From 374b30f27f1ae5a88c7f2868ec4abff9fc14d679 Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda Date: Thu, 24 Nov 2022 13:39:07 +0100 Subject: earlycon: Let users set the clock frequency Some platforms, namely AMD Picasso, use non standard uart clocks (48M), witch makes it impossible to use with earlycon. Let the user select its own frequency. Signed-off-by: Ricardo Ribalda Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123-serial-clk-v3-1-49c516980ae0@chromium.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/earlycon.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/earlycon.c b/drivers/tty/serial/earlycon.c index 4f6e9bf57169..a5fbb6ed38ae 100644 --- a/drivers/tty/serial/earlycon.c +++ b/drivers/tty/serial/earlycon.c @@ -120,7 +120,13 @@ static int __init parse_options(struct earlycon_device *device, char *options) } if (options) { + char *uartclk; + device->baud = simple_strtoul(options, NULL, 0); + uartclk = strchr(options, ','); + if (uartclk && kstrtouint(uartclk + 1, 0, &port->uartclk) < 0) + pr_warn("[%s] unsupported earlycon uart clkrate option\n", + options); length = min(strcspn(options, " ") + 1, (size_t)(sizeof(device->options))); strscpy(device->options, options, length); @@ -139,7 +145,8 @@ static int __init register_earlycon(char *buf, const struct earlycon_id *match) buf = NULL; spin_lock_init(&port->lock); - port->uartclk = BASE_BAUD * 16; + if (!port->uartclk) + port->uartclk = BASE_BAUD * 16; if (port->mapbase) port->membase = earlycon_map(port->mapbase, 64); -- cgit v1.2.3 From 8890717526c8e13801f7e866329a2bfce3a62240 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Fri, 9 Dec 2022 23:04:35 +0800 Subject: serial: earlycon-arm-semihost: Move smh_putc() variants in respective arch's semihost.h Move smh_putc() variants in respective arch/*/include/asm/semihost.h, in preparation to add RISC-V support. Signed-off-by: Bin Meng Tested-by: Sergey Matyukevich Acked-by: Palmer Dabbelt Link: https://lore.kernel.org/r/20221209150437.795918-2-bmeng@tinylab.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/earlycon-arm-semihost.c | 25 +------------------------ 1 file changed, 1 insertion(+), 24 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/earlycon-arm-semihost.c b/drivers/tty/serial/earlycon-arm-semihost.c index fcdec5f42376..e4692a8433f9 100644 --- a/drivers/tty/serial/earlycon-arm-semihost.c +++ b/drivers/tty/serial/earlycon-arm-semihost.c @@ -11,30 +11,7 @@ #include #include #include - -#ifdef CONFIG_THUMB2_KERNEL -#define SEMIHOST_SWI "0xab" -#else -#define SEMIHOST_SWI "0x123456" -#endif - -/* - * Semihosting-based debug console - */ -static void smh_putc(struct uart_port *port, unsigned char c) -{ -#ifdef CONFIG_ARM64 - asm volatile("mov x1, %0\n" - "mov x0, #3\n" - "hlt 0xf000\n" - : : "r" (&c) : "x0", "x1", "memory"); -#else - asm volatile("mov r1, %0\n" - "mov r0, #3\n" - "svc " SEMIHOST_SWI "\n" - : : "r" (&c) : "r0", "r1", "memory"); -#endif -} +#include static void smh_write(struct console *con, const char *s, unsigned n) { -- cgit v1.2.3 From db5489f4be000cbb7e7ce9cc1a264c5d3d25b56f Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Fri, 9 Dec 2022 23:04:36 +0800 Subject: riscv: Implement semihost.h for earlycon semihost driver Per RISC-V semihosting spec [1], implement semihost.h for the existing Arm semihosting earlycon driver to work on RISC-V. Link: https://github.com/riscv/riscv-semihosting-spec/blob/main/riscv-semihosting-spec.adoc [1] Signed-off-by: Bin Meng Tested-by: Sergey Matyukevich Acked-by: Palmer Dabbelt Link: https://lore.kernel.org/r/20221209150437.795918-3-bmeng@tinylab.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index c55b947f3cdb..5a2cf9686b20 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -75,7 +75,7 @@ config SERIAL_AMBA_PL011_CONSOLE config SERIAL_EARLYCON_ARM_SEMIHOST bool "Early console using ARM semihosting" - depends on ARM64 || ARM + depends on ARM64 || ARM || RISCV select SERIAL_CORE select SERIAL_CORE_CONSOLE select SERIAL_EARLYCON -- cgit v1.2.3 From 359fb3f870465cc3b9a77728d09e033a248b40b6 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Fri, 9 Dec 2022 23:04:37 +0800 Subject: serial: Rename earlycon semihost driver Now that earlycon semihost driver works on RISC-V too, let's use a much more generic name for the driver. Signed-off-by: Bin Meng Tested-by: Sergey Matyukevich Acked-by: Palmer Dabbelt Link: https://lore.kernel.org/r/20221209150437.795918-4-bmeng@tinylab.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/Kconfig | 12 ++++++------ drivers/tty/serial/Makefile | 2 +- drivers/tty/serial/earlycon-arm-semihost.c | 28 ---------------------------- drivers/tty/serial/earlycon-semihost.c | 28 ++++++++++++++++++++++++++++ 4 files changed, 35 insertions(+), 35 deletions(-) delete mode 100644 drivers/tty/serial/earlycon-arm-semihost.c create mode 100644 drivers/tty/serial/earlycon-semihost.c (limited to 'drivers/tty') diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 5a2cf9686b20..fc99bb09e045 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -73,17 +73,17 @@ config SERIAL_AMBA_PL011_CONSOLE your boot loader (lilo or loadlin) about how to pass options to the kernel at boot time.) -config SERIAL_EARLYCON_ARM_SEMIHOST - bool "Early console using ARM semihosting" +config SERIAL_EARLYCON_SEMIHOST + bool "Early console using Arm compatible semihosting" depends on ARM64 || ARM || RISCV select SERIAL_CORE select SERIAL_CORE_CONSOLE select SERIAL_EARLYCON help - Support for early debug console using ARM semihosting. This enables - the console before standard serial driver is probed. This is enabled - with "earlycon=smh" on the kernel command line. The console is - enabled when early_param is processed. + Support for early debug console using Arm compatible semihosting. + This enables the console before standard serial driver is probed. + This is enabled with "earlycon=smh" on the kernel command line. + The console is enabled when early_param is processed. config SERIAL_EARLYCON_RISCV_SBI bool "Early console using RISC-V SBI" diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 238a9557b487..cd9afd9e3018 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_SERIAL_CORE) += serial_core.o obj-$(CONFIG_SERIAL_EARLYCON) += earlycon.o -obj-$(CONFIG_SERIAL_EARLYCON_ARM_SEMIHOST) += earlycon-arm-semihost.o +obj-$(CONFIG_SERIAL_EARLYCON_SEMIHOST) += earlycon-semihost.o obj-$(CONFIG_SERIAL_EARLYCON_RISCV_SBI) += earlycon-riscv-sbi.o # These Sparc drivers have to appear before others such as 8250 diff --git a/drivers/tty/serial/earlycon-arm-semihost.c b/drivers/tty/serial/earlycon-arm-semihost.c deleted file mode 100644 index e4692a8433f9..000000000000 --- a/drivers/tty/serial/earlycon-arm-semihost.c +++ /dev/null @@ -1,28 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2012 ARM Ltd. - * Author: Marc Zyngier - * - * Adapted for ARM and earlycon: - * Copyright (C) 2014 Linaro Ltd. - * Author: Rob Herring - */ -#include -#include -#include -#include -#include - -static void smh_write(struct console *con, const char *s, unsigned n) -{ - struct earlycon_device *dev = con->data; - uart_console_write(&dev->port, s, n, smh_putc); -} - -static int -__init early_smh_setup(struct earlycon_device *device, const char *opt) -{ - device->con->write = smh_write; - return 0; -} -EARLYCON_DECLARE(smh, early_smh_setup); diff --git a/drivers/tty/serial/earlycon-semihost.c b/drivers/tty/serial/earlycon-semihost.c new file mode 100644 index 000000000000..e4692a8433f9 --- /dev/null +++ b/drivers/tty/serial/earlycon-semihost.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2012 ARM Ltd. + * Author: Marc Zyngier + * + * Adapted for ARM and earlycon: + * Copyright (C) 2014 Linaro Ltd. + * Author: Rob Herring + */ +#include +#include +#include +#include +#include + +static void smh_write(struct console *con, const char *s, unsigned n) +{ + struct earlycon_device *dev = con->data; + uart_console_write(&dev->port, s, n, smh_putc); +} + +static int +__init early_smh_setup(struct earlycon_device *device, const char *opt) +{ + device->con->write = smh_write; + return 0; +} +EARLYCON_DECLARE(smh, early_smh_setup); -- cgit v1.2.3 From 2696216becbe2db3eb8dba38008a5a222317167e Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:47 -0500 Subject: serial: liteuart: use KBUILD_MODNAME as driver name Replace hard-coded instances of "liteuart" with KBUILD_MODNAME. Signed-off-by: Gabriel Somlo Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-2-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 062812fe1b09..db898751ffe3 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -57,7 +57,7 @@ static struct console liteuart_console; static struct uart_driver liteuart_driver = { .owner = THIS_MODULE, - .driver_name = "liteuart", + .driver_name = KBUILD_MODNAME, .dev_name = "ttyLXU", .major = 0, .minor = 0, @@ -321,7 +321,7 @@ static struct platform_driver liteuart_platform_driver = { .probe = liteuart_probe, .remove = liteuart_remove, .driver = { - .name = "liteuart", + .name = KBUILD_MODNAME, .of_match_table = liteuart_of_match, }, }; @@ -367,7 +367,7 @@ static int liteuart_console_setup(struct console *co, char *options) } static struct console liteuart_console = { - .name = "liteuart", + .name = KBUILD_MODNAME, .write = liteuart_console_write, .device = uart_console_device, .setup = liteuart_console_setup, -- cgit v1.2.3 From 5996b2e338eae69aa40c9692bfd896abebc75798 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:48 -0500 Subject: serial: liteuart: use bit number macros Replace magic bit constants (e.g., 1, 2, 4) with BIT(x) expressions. Signed-off-by: Gabriel Somlo Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-3-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index db898751ffe3..18c1eb315ee9 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -5,6 +5,7 @@ * Copyright (C) 2019-2020 Antmicro */ +#include #include #include #include @@ -38,8 +39,8 @@ #define OFF_EV_ENABLE 0x14 /* events */ -#define EV_TX 0x1 -#define EV_RX 0x2 +#define EV_TX BIT(0) +#define EV_RX BIT(1) struct liteuart_port { struct uart_port port; -- cgit v1.2.3 From 380596228d21f25027b5bb8770eef587f9f742f5 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:49 -0500 Subject: serial: liteuart: remove unused uart_ops stubs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Remove stub uart_ops methods that are not called unconditionally from serial_core. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-4-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 18c1eb315ee9..989a4f8d5bd4 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -154,11 +154,6 @@ static void liteuart_stop_rx(struct uart_port *port) del_timer(&uart->timer); } -static void liteuart_break_ctl(struct uart_port *port, int break_state) -{ - /* LiteUART doesn't support sending break signal */ -} - static int liteuart_startup(struct uart_port *port) { struct liteuart_port *uart = to_liteuart_port(port); @@ -197,15 +192,6 @@ static const char *liteuart_type(struct uart_port *port) return "liteuart"; } -static void liteuart_release_port(struct uart_port *port) -{ -} - -static int liteuart_request_port(struct uart_port *port) -{ - return 0; -} - static void liteuart_config_port(struct uart_port *port, int flags) { /* @@ -232,13 +218,10 @@ static const struct uart_ops liteuart_ops = { .stop_tx = liteuart_stop_tx, .start_tx = liteuart_start_tx, .stop_rx = liteuart_stop_rx, - .break_ctl = liteuart_break_ctl, .startup = liteuart_startup, .shutdown = liteuart_shutdown, .set_termios = liteuart_set_termios, .type = liteuart_type, - .release_port = liteuart_release_port, - .request_port = liteuart_request_port, .config_port = liteuart_config_port, .verify_port = liteuart_verify_port, }; -- cgit v1.2.3 From 7378beacbb3357b76f26938749b009e01e5ab00b Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:50 -0500 Subject: serial: liteuart: don't set unused port fields Remove regshift and iobase port fields, since they are unused by the driver. Signed-off-by: Gabriel Somlo Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-5-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 989a4f8d5bd4..c6eb7eba5af8 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -263,9 +263,7 @@ static int liteuart_probe(struct platform_device *pdev) port->iotype = UPIO_MEM; port->flags = UPF_BOOT_AUTOCONF; port->ops = &liteuart_ops; - port->regshift = 2; port->fifosize = 16; - port->iobase = 1; port->type = PORT_UNKNOWN; port->line = dev_id; spin_lock_init(&port->lock); -- cgit v1.2.3 From b9f5a18a9d7c4c41325c72971abec19278c7c6e6 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:51 -0500 Subject: serial: liteuart: minor style fix in liteuart_init() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-6-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index c6eb7eba5af8..1e3429bcc2ad 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -397,12 +397,10 @@ static int __init liteuart_init(void) return res; res = platform_driver_register(&liteuart_platform_driver); - if (res) { + if (res) uart_unregister_driver(&liteuart_driver); - return res; - } - return 0; + return res; } static void __exit liteuart_exit(void) -- cgit v1.2.3 From 2ee91d42bf5ac2f2f2862d06f7344ffe89d4a032 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:52 -0500 Subject: serial: liteuart: move tty_flip_buffer_push() out of rx loop MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Calling tty_flip_buffer_push() for each individual received character is overkill. Move it out of the rx loop, and only call it once per set of characters received together. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-7-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 1e3429bcc2ad..81a86c5eb393 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -87,10 +87,10 @@ static void liteuart_timer(struct timer_list *t) /* no overflow bits in status */ if (!(uart_handle_sysrq_char(port, ch))) uart_insert_char(port, status, 0, ch, flg); - - tty_flip_buffer_push(&port->state->port); } + tty_flip_buffer_push(&port->state->port); + mod_timer(&uart->timer, jiffies + uart_poll_timeout(port)); } -- cgit v1.2.3 From 771268843caa3ecd3fa43b05a6d1d74700785ad8 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:53 -0500 Subject: serial: liteuart: rx loop should only ack rx events While receiving characters, it is necessary to acknowledge each one by writing to the EV_PENDING register's EV_RX bit. Ensure we do not also gratuitously set the EV_TX bit in the process. Signed-off-by: Gabriel Somlo Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-8-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 81a86c5eb393..c90ab65fbdcf 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -82,7 +82,7 @@ static void liteuart_timer(struct timer_list *t) port->icount.rx++; /* necessary for RXEMPTY to refresh its value */ - litex_write8(membase + OFF_EV_PENDING, EV_TX | EV_RX); + litex_write8(membase + OFF_EV_PENDING, EV_RX); /* no overflow bits in status */ if (!(uart_handle_sysrq_char(port, ch))) -- cgit v1.2.3 From ca538cc7271dea86773712b84ed02b22aaed1a12 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:54 -0500 Subject: serial: liteuart: simplify passing of uart_insert_char() flag MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Simply provide the hard-coded TTY_NORMAL flag to uart_insert_char() directly -- no need to dedicate a variable for that exclusive purpose. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-9-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index c90ab65fbdcf..81aa7c1da73c 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -73,7 +73,6 @@ static void liteuart_timer(struct timer_list *t) struct liteuart_port *uart = from_timer(uart, t, timer); struct uart_port *port = &uart->port; unsigned char __iomem *membase = port->membase; - unsigned int flg = TTY_NORMAL; int ch; unsigned long status; @@ -86,7 +85,7 @@ static void liteuart_timer(struct timer_list *t) /* no overflow bits in status */ if (!(uart_handle_sysrq_char(port, ch))) - uart_insert_char(port, status, 0, ch, flg); + uart_insert_char(port, status, 0, ch, TTY_NORMAL); } tty_flip_buffer_push(&port->state->port); -- cgit v1.2.3 From a774aa4580d4339a37e4810f303b6a39ddc745ea Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:55 -0500 Subject: serial: liteuart: clean up rx loop variables MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The `status` variable will always be `1` when passed into the call to `uart_insert_char()`, so it can be eliminated altogether. Use `u8` as the type for `ch`, as it matches the return type of the `litex_read8()` call which produces its value. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-10-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 81aa7c1da73c..62bfd2ed9051 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -73,10 +73,9 @@ static void liteuart_timer(struct timer_list *t) struct liteuart_port *uart = from_timer(uart, t, timer); struct uart_port *port = &uart->port; unsigned char __iomem *membase = port->membase; - int ch; - unsigned long status; + u8 ch; - while ((status = !litex_read8(membase + OFF_RXEMPTY)) == 1) { + while (!litex_read8(membase + OFF_RXEMPTY)) { ch = litex_read8(membase + OFF_RXTX); port->icount.rx++; @@ -85,7 +84,7 @@ static void liteuart_timer(struct timer_list *t) /* no overflow bits in status */ if (!(uart_handle_sysrq_char(port, ch))) - uart_insert_char(port, status, 0, ch, TTY_NORMAL); + uart_insert_char(port, 1, 0, ch, TTY_NORMAL); } tty_flip_buffer_push(&port->state->port); -- cgit v1.2.3 From 5dcceabe8e2a72845e3cf7c73ab2302bf5deb69a Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:56 -0500 Subject: serial: liteuart: separate rx loop from poll timer MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert the rx loop into its own dedicated function, and (for now) call it from the poll timer. This is in preparation for adding irq support to the receive path. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-11-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 62bfd2ed9051..ab6837f3e40d 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -68,10 +68,8 @@ static struct uart_driver liteuart_driver = { #endif }; -static void liteuart_timer(struct timer_list *t) +static void liteuart_rx_chars(struct uart_port *port) { - struct liteuart_port *uart = from_timer(uart, t, timer); - struct uart_port *port = &uart->port; unsigned char __iomem *membase = port->membase; u8 ch; @@ -88,6 +86,14 @@ static void liteuart_timer(struct timer_list *t) } tty_flip_buffer_push(&port->state->port); +} + +static void liteuart_timer(struct timer_list *t) +{ + struct liteuart_port *uart = from_timer(uart, t, timer); + struct uart_port *port = &uart->port; + + liteuart_rx_chars(port); mod_timer(&uart->timer, jiffies + uart_poll_timeout(port)); } -- cgit v1.2.3 From 7121d86effddc28dc21fec38d59923ea12d5a873 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:57 -0500 Subject: serial: liteuart: move function definitions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Move definitions for liteuart_[stop|start]_tx(), liteuart_stop_rx(), and liteuart_putchar() to a more convenient location in preparation for adding IRQ support. This patch contains no functional changes. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Geert Uytterhoeven Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-12-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 82 +++++++++++++++++++++---------------------- 1 file changed, 41 insertions(+), 41 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index ab6837f3e40d..0b9d96e5efcf 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -68,6 +68,47 @@ static struct uart_driver liteuart_driver = { #endif }; +static void liteuart_putchar(struct uart_port *port, unsigned char ch) +{ + while (litex_read8(port->membase + OFF_TXFULL)) + cpu_relax(); + + litex_write8(port->membase + OFF_RXTX, ch); +} + +static void liteuart_stop_tx(struct uart_port *port) +{ +} + +static void liteuart_start_tx(struct uart_port *port) +{ + struct circ_buf *xmit = &port->state->xmit; + unsigned char ch; + + if (unlikely(port->x_char)) { + litex_write8(port->membase + OFF_RXTX, port->x_char); + port->icount.tx++; + port->x_char = 0; + } else if (!uart_circ_empty(xmit)) { + while (xmit->head != xmit->tail) { + ch = xmit->buf[xmit->tail]; + uart_xmit_advance(port, 1); + liteuart_putchar(port, ch); + } + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); +} + +static void liteuart_stop_rx(struct uart_port *port) +{ + struct liteuart_port *uart = to_liteuart_port(port); + + /* just delete timer */ + del_timer(&uart->timer); +} + static void liteuart_rx_chars(struct uart_port *port) { unsigned char __iomem *membase = port->membase; @@ -98,14 +139,6 @@ static void liteuart_timer(struct timer_list *t) mod_timer(&uart->timer, jiffies + uart_poll_timeout(port)); } -static void liteuart_putchar(struct uart_port *port, unsigned char ch) -{ - while (litex_read8(port->membase + OFF_TXFULL)) - cpu_relax(); - - litex_write8(port->membase + OFF_RXTX, ch); -} - static unsigned int liteuart_tx_empty(struct uart_port *port) { /* not really tx empty, just checking if tx is not full */ @@ -125,39 +158,6 @@ static unsigned int liteuart_get_mctrl(struct uart_port *port) return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR; } -static void liteuart_stop_tx(struct uart_port *port) -{ -} - -static void liteuart_start_tx(struct uart_port *port) -{ - struct circ_buf *xmit = &port->state->xmit; - unsigned char ch; - - if (unlikely(port->x_char)) { - litex_write8(port->membase + OFF_RXTX, port->x_char); - port->icount.tx++; - port->x_char = 0; - } else if (!uart_circ_empty(xmit)) { - while (xmit->head != xmit->tail) { - ch = xmit->buf[xmit->tail]; - uart_xmit_advance(port, 1); - liteuart_putchar(port, ch); - } - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); -} - -static void liteuart_stop_rx(struct uart_port *port) -{ - struct liteuart_port *uart = to_liteuart_port(port); - - /* just delete timer */ - del_timer(&uart->timer); -} - static int liteuart_startup(struct uart_port *port) { struct liteuart_port *uart = to_liteuart_port(port); -- cgit v1.2.3 From 5602cf99dcdcc0bf8f9a5979b7443fbe46686995 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:58 -0500 Subject: serial: liteuart: add IRQ support for the RX path MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add support for IRQ-driven RX. Support for the TX path will be added in a separate commit. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-13-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 81 +++++++++++++++++++++++++++++++++++++++---- 1 file changed, 74 insertions(+), 7 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 0b9d96e5efcf..8685c97d391e 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -46,6 +47,7 @@ struct liteuart_port { struct uart_port port; struct timer_list timer; u32 id; + u8 irq_reg; }; #define to_liteuart_port(port) container_of(port, struct liteuart_port, port) @@ -76,6 +78,19 @@ static void liteuart_putchar(struct uart_port *port, unsigned char ch) litex_write8(port->membase + OFF_RXTX, ch); } +static void liteuart_update_irq_reg(struct uart_port *port, bool set, u8 mask) +{ + struct liteuart_port *uart = to_liteuart_port(port); + + if (set) + uart->irq_reg |= mask; + else + uart->irq_reg &= ~mask; + + if (port->irq) + litex_write8(port->membase + OFF_EV_ENABLE, uart->irq_reg); +} + static void liteuart_stop_tx(struct uart_port *port) { } @@ -129,13 +144,32 @@ static void liteuart_rx_chars(struct uart_port *port) tty_flip_buffer_push(&port->state->port); } +static irqreturn_t liteuart_interrupt(int irq, void *data) +{ + struct liteuart_port *uart = data; + struct uart_port *port = &uart->port; + unsigned long flags; + u8 isr; + + /* + * if polling, the context would be "in_serving_softirq", so use + * irq[save|restore] spin_lock variants to cover all possibilities + */ + spin_lock_irqsave(&port->lock, flags); + isr = litex_read8(port->membase + OFF_EV_PENDING) & uart->irq_reg; + if (isr & EV_RX) + liteuart_rx_chars(port); + spin_unlock_irqrestore(&port->lock, flags); + + return IRQ_RETVAL(isr); +} + static void liteuart_timer(struct timer_list *t) { struct liteuart_port *uart = from_timer(uart, t, timer); struct uart_port *port = &uart->port; - liteuart_rx_chars(port); - + liteuart_interrupt(0, port); mod_timer(&uart->timer, jiffies + uart_poll_timeout(port)); } @@ -161,19 +195,46 @@ static unsigned int liteuart_get_mctrl(struct uart_port *port) static int liteuart_startup(struct uart_port *port) { struct liteuart_port *uart = to_liteuart_port(port); + unsigned long flags; + int ret; + + if (port->irq) { + ret = request_irq(port->irq, liteuart_interrupt, 0, + KBUILD_MODNAME, uart); + if (ret) { + dev_warn(port->dev, + "line %d irq %d failed: switch to polling\n", + port->line, port->irq); + port->irq = 0; + } + } - /* disable events */ - litex_write8(port->membase + OFF_EV_ENABLE, 0); + spin_lock_irqsave(&port->lock, flags); + /* only enabling rx irqs during startup */ + liteuart_update_irq_reg(port, true, EV_RX); + spin_unlock_irqrestore(&port->lock, flags); - /* prepare timer for polling */ - timer_setup(&uart->timer, liteuart_timer, 0); - mod_timer(&uart->timer, jiffies + uart_poll_timeout(port)); + if (!port->irq) { + timer_setup(&uart->timer, liteuart_timer, 0); + mod_timer(&uart->timer, jiffies + uart_poll_timeout(port)); + } return 0; } static void liteuart_shutdown(struct uart_port *port) { + struct liteuart_port *uart = to_liteuart_port(port); + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + liteuart_update_irq_reg(port, false, EV_RX | EV_TX); + spin_unlock_irqrestore(&port->lock, flags); + + if (port->irq) + free_irq(port->irq, port); + else + del_timer_sync(&uart->timer); } static void liteuart_set_termios(struct uart_port *port, struct ktermios *new, @@ -262,6 +323,12 @@ static int liteuart_probe(struct platform_device *pdev) goto err_erase_id; } + ret = platform_get_irq_optional(pdev, 0); + if (ret < 0 && ret != -ENXIO) + return ret; + if (ret > 0) + port->irq = ret; + /* values not from device tree */ port->dev = &pdev->dev; port->iotype = UPIO_MEM; -- cgit v1.2.3 From 01a305a36639a438e27503202a46f191b74bd168 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:04:59 -0500 Subject: serial: liteuart: add IRQ support for the TX path MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Switch the TX path to IRQ-driven operation, while maintaining support for polling mode via the poll timer. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-14-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 30 +++++++++++++----------------- 1 file changed, 13 insertions(+), 17 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 8685c97d391e..6e9f58d3957c 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -93,27 +93,12 @@ static void liteuart_update_irq_reg(struct uart_port *port, bool set, u8 mask) static void liteuart_stop_tx(struct uart_port *port) { + liteuart_update_irq_reg(port, false, EV_TX); } static void liteuart_start_tx(struct uart_port *port) { - struct circ_buf *xmit = &port->state->xmit; - unsigned char ch; - - if (unlikely(port->x_char)) { - litex_write8(port->membase + OFF_RXTX, port->x_char); - port->icount.tx++; - port->x_char = 0; - } else if (!uart_circ_empty(xmit)) { - while (xmit->head != xmit->tail) { - ch = xmit->buf[xmit->tail]; - uart_xmit_advance(port, 1); - liteuart_putchar(port, ch); - } - } - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(port); + liteuart_update_irq_reg(port, true, EV_TX); } static void liteuart_stop_rx(struct uart_port *port) @@ -144,6 +129,15 @@ static void liteuart_rx_chars(struct uart_port *port) tty_flip_buffer_push(&port->state->port); } +static void liteuart_tx_chars(struct uart_port *port) +{ + u8 ch; + + uart_port_tx(port, ch, + !litex_read8(port->membase + OFF_TXFULL), + litex_write8(port->membase + OFF_RXTX, ch)); +} + static irqreturn_t liteuart_interrupt(int irq, void *data) { struct liteuart_port *uart = data; @@ -159,6 +153,8 @@ static irqreturn_t liteuart_interrupt(int irq, void *data) isr = litex_read8(port->membase + OFF_EV_PENDING) & uart->irq_reg; if (isr & EV_RX) liteuart_rx_chars(port); + if (isr & EV_TX) + liteuart_tx_chars(port); spin_unlock_irqrestore(&port->lock, flags); return IRQ_RETVAL(isr); -- cgit v1.2.3 From f1c6c8b1b42dd72bd54adec003463650b84893d8 Mon Sep 17 00:00:00 2001 From: Gabriel Somlo Date: Wed, 23 Nov 2022 08:05:00 -0500 Subject: serial: liteuart: move polling putchar() function MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The polling liteuart_putchar() function is only called from methods conditionally enabled by CONFIG_SERIAL_LITEUART_CONSOLE. Move its definition closer to the console code where it is dependent on the same config option. Signed-off-by: Gabriel Somlo Reviewed-by: Ilpo Järvinen Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221123130500.1030189-15-gsomlo@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 6e9f58d3957c..ef557d59e4c8 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -70,14 +70,6 @@ static struct uart_driver liteuart_driver = { #endif }; -static void liteuart_putchar(struct uart_port *port, unsigned char ch) -{ - while (litex_read8(port->membase + OFF_TXFULL)) - cpu_relax(); - - litex_write8(port->membase + OFF_RXTX, ch); -} - static void liteuart_update_irq_reg(struct uart_port *port, bool set, u8 mask) { struct liteuart_port *uart = to_liteuart_port(port); @@ -377,6 +369,14 @@ static struct platform_driver liteuart_platform_driver = { #ifdef CONFIG_SERIAL_LITEUART_CONSOLE +static void liteuart_putchar(struct uart_port *port, unsigned char ch) +{ + while (litex_read8(port->membase + OFF_TXFULL)) + cpu_relax(); + + litex_write8(port->membase + OFF_RXTX, ch); +} + static void liteuart_console_write(struct console *co, const char *s, unsigned int count) { -- cgit v1.2.3 From 98a59cd26e22e34ecae6af769cfc9f3b4ecd6c72 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Fri, 25 Nov 2022 14:27:56 +0100 Subject: serial: liteuart: drop obsolete dependency on COMPILE_TEST Since commit 0166dc11be91 ("of: make CONFIG_OF user selectable"), it is possible to test-build any driver which depends on OF on any architecture by explicitly selecting OF. Therefore depending on COMPILE_TEST as an alternative is no longer needed. It is actually better to always build such drivers with OF enabled, so that the test builds are closer to how each driver will actually be built on its intended target. Building them without OF may not test much as the compiler will optimize out potentially large parts of the code. In the worst case, this could even pop false positive warnings. Dropping COMPILE_TEST here improves the quality of our testing and avoids wasting time on non-existent issues. Signed-off-by: Jean Delvare Cc: Karol Gugala Cc: Mateusz Holenko Cc: Gabriel Somlo Cc: Joel Stanley Cc: Greg Kroah-Hartman Acked-by: Gabriel Somlo Link: https://lore.kernel.org/r/20221125142756.3e51a28d@endymion.delvare Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index fc99bb09e045..eb236f7ca7f9 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1507,7 +1507,7 @@ config SERIAL_MILBEAUT_USIO_CONSOLE config SERIAL_LITEUART tristate "LiteUART serial port support" depends on HAS_IOMEM - depends on OF || COMPILE_TEST + depends on OF depends on LITEX || COMPILE_TEST select SERIAL_CORE help -- cgit v1.2.3 From ef460db2a7c1df5eda2ea6011e7586e54e23b8c4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 25 Nov 2022 15:05:04 +0200 Subject: serial: 8250: Use defined IER bits MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Instead of literal 0x0f, add a define for enabling all IER bits the 8250 driver is interested in. Don't make the define for combined flags part of UAPI. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_port.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index beba8f38b3dc..8676f8b7f2e3 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1236,14 +1236,14 @@ static void autoconfig(struct uart_8250_port *up) * Mask out IER[7:4] bits for test as some UARTs (e.g. TL * 16C754B) allow only to modify them if an EFR bit is set. */ - scratch2 = serial_in(up, UART_IER) & 0x0f; - serial_out(up, UART_IER, 0x0F); + scratch2 = serial_in(up, UART_IER) & UART_IER_ALL_INTR; + serial_out(up, UART_IER, UART_IER_ALL_INTR); #ifdef __i386__ outb(0, 0x080); #endif - scratch3 = serial_in(up, UART_IER) & 0x0f; + scratch3 = serial_in(up, UART_IER) & UART_IER_ALL_INTR; serial_out(up, UART_IER, scratch); - if (scratch2 != 0 || scratch3 != 0x0F) { + if (scratch2 != 0 || scratch3 != UART_IER_ALL_INTR) { /* * We failed; there's nothing here */ @@ -1394,7 +1394,7 @@ static void autoconfig_irq(struct uart_8250_port *up) serial8250_out_MCR(up, UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2); } - serial_out(up, UART_IER, 0x0f); /* enable all intrs */ + serial_out(up, UART_IER, UART_IER_ALL_INTR); serial_in(up, UART_LSR); serial_in(up, UART_RX); serial_in(up, UART_IIR); -- cgit v1.2.3 From d9c1d3cbdeec94f077679b73ed5ce3a4fe4bf4b8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 25 Nov 2022 15:05:05 +0200 Subject: serial: 8250: Name MSR literals MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add UART_MSR_STATUS_BITS for CD, RI, DSR & CTS. Use names for the literal. Don't make the define for combined flags part of UAPI. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_port.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 8676f8b7f2e3..c870ee8e80b6 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1268,9 +1268,9 @@ static void autoconfig(struct uart_8250_port *up) */ if (!(port->flags & UPF_SKIP_TEST)) { serial8250_out_MCR(up, UART_MCR_LOOP | 0x0A); - status1 = serial_in(up, UART_MSR) & 0xF0; + status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS; serial8250_out_MCR(up, save_mcr); - if (status1 != 0x90) { + if (status1 != (UART_MSR_DCD | UART_MSR_CTS)) { spin_unlock_irqrestore(&port->lock, flags); DEBUG_AUTOCONF("LOOP test failed (%02x) ", status1); -- cgit v1.2.3 From 67a9aee7815d10e9227e32c3c7ea26726284eaef Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 25 Nov 2022 15:05:06 +0200 Subject: serial: 8250: Cleanup MCR literals MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use proper names from MCR bits. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-4-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_port.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index c870ee8e80b6..e79bf2afd9be 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1267,7 +1267,7 @@ static void autoconfig(struct uart_8250_port *up) * that conflicts with COM 1-4 --- we hope! */ if (!(port->flags & UPF_SKIP_TEST)) { - serial8250_out_MCR(up, UART_MCR_LOOP | 0x0A); + serial8250_out_MCR(up, UART_MCR_LOOP | UART_MCR_OUT2 | UART_MCR_RTS); status1 = serial_in(up, UART_MSR) & UART_MSR_STATUS_BITS; serial8250_out_MCR(up, save_mcr); if (status1 != (UART_MSR_DCD | UART_MSR_CTS)) { -- cgit v1.2.3 From 3398cc4f2b1592148a2ebabc5a2df3e303d4e77c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 25 Nov 2022 15:05:07 +0200 Subject: serial: 8250: Add IIR FIFOs enabled field properly MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Don't use magic literals & comments but define a real field instead for UART_IIR_FIFO_ENABLED and name also the values. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-5-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_port.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index e79bf2afd9be..a47ce3e974a2 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1293,22 +1293,19 @@ static void autoconfig(struct uart_8250_port *up) serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); - /* Assign this as it is to truncate any bits above 7. */ - scratch = serial_in(up, UART_IIR); - - switch (scratch >> 6) { - case 0: + switch (serial_in(up, UART_IIR) & UART_IIR_FIFO_ENABLED) { + case UART_IIR_FIFO_ENABLED_8250: autoconfig_8250(up); break; - case 1: - port->type = PORT_UNKNOWN; - break; - case 2: + case UART_IIR_FIFO_ENABLED_16550: port->type = PORT_16550; break; - case 3: + case UART_IIR_FIFO_ENABLED_16550A: autoconfig_16550a(up); break; + default: + port->type = PORT_UNKNOWN; + break; } #ifdef CONFIG_SERIAL_8250_RSA -- cgit v1.2.3 From afd216ca17b1fd24f6b73a1490752c22ab42598c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 25 Nov 2022 15:05:08 +0200 Subject: serial: 8250: Define IIR 64 byte bit & cleanup related code MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 16750 indicates 64 bytes FIFO with a IIR bit. Add define for it and make related code more obvious. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-6-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_port.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index a47ce3e974a2..33be7aad11ef 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1050,11 +1050,12 @@ static void autoconfig_16550a(struct uart_8250_port *up) serial_out(up, UART_LCR, 0); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - status1 = serial_in(up, UART_IIR) >> 5; + status1 = serial_in(up, UART_IIR) & (UART_IIR_64BYTE_FIFO | + UART_IIR_FIFO_ENABLED); serial_out(up, UART_FCR, 0); serial_out(up, UART_LCR, 0); - if (status1 == 7) + if (status1 == (UART_IIR_64BYTE_FIFO | UART_IIR_FIFO_ENABLED)) up->port.type = PORT_16550A_FSL64; else DEBUG_AUTOCONF("Motorola 8xxx DUART "); @@ -1122,17 +1123,20 @@ static void autoconfig_16550a(struct uart_8250_port *up) */ serial_out(up, UART_LCR, 0); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - status1 = serial_in(up, UART_IIR) >> 5; + status1 = serial_in(up, UART_IIR) & (UART_IIR_64BYTE_FIFO | UART_IIR_FIFO_ENABLED); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); + serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); - status2 = serial_in(up, UART_IIR) >> 5; + status2 = serial_in(up, UART_IIR) & (UART_IIR_64BYTE_FIFO | UART_IIR_FIFO_ENABLED); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); + serial_out(up, UART_LCR, 0); DEBUG_AUTOCONF("iir1=%d iir2=%d ", status1, status2); - if (status1 == 6 && status2 == 7) { + if (status1 == UART_IIR_FIFO_ENABLED_16550A && + status2 == (UART_IIR_64BYTE_FIFO | UART_IIR_FIFO_ENABLED_16550A)) { up->port.type = PORT_16750; up->capabilities |= UART_CAP_AFE | UART_CAP_SLEEP; return; -- cgit v1.2.3 From 8573b2ebcea3f16680ba294bad1478eecc5de601 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Fri, 25 Nov 2022 15:05:09 +0200 Subject: serial: 8250_early: Convert literals to use defines MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use existing defines for the serial register values in 8250_early. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-7-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_early.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c index f271becfc46c..0ebde0ab8167 100644 --- a/drivers/tty/serial/8250/8250_early.c +++ b/drivers/tty/serial/8250/8250_early.c @@ -136,11 +136,11 @@ static void __init init_port(struct earlycon_device *device) unsigned char c; unsigned int ier; - serial8250_early_out(port, UART_LCR, 0x3); /* 8n1 */ + serial8250_early_out(port, UART_LCR, UART_LCR_WLEN8); /* 8n1 */ ier = serial8250_early_in(port, UART_IER); serial8250_early_out(port, UART_IER, ier & UART_IER_UUE); /* no interrupt */ serial8250_early_out(port, UART_FCR, 0); /* no fifo */ - serial8250_early_out(port, UART_MCR, 0x3); /* DTR + RTS */ + serial8250_early_out(port, UART_MCR, UART_MCR_DTR | UART_MCR_RTS); if (port->uartclk) { divisor = DIV_ROUND_CLOSEST(port->uartclk, 16 * device->baud); -- cgit v1.2.3 From db4df8e9d79e7d37732c1a1b560958e8dadfefa1 Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Fri, 9 Dec 2022 12:27:36 +0100 Subject: tty: fix out-of-bounds access in tty_driver_lookup_tty() When specifying an invalid console= device like console=tty3270, tty_driver_lookup_tty() returns the tty struct without checking whether index is a valid number. To reproduce: qemu-system-x86_64 -enable-kvm -nographic -serial mon:stdio \ -kernel ../linux-build-x86/arch/x86/boot/bzImage \ -append "console=ttyS0 console=tty3270" This crashes with: [ 0.770599] BUG: kernel NULL pointer dereference, address: 00000000000000ef [ 0.771265] #PF: supervisor read access in kernel mode [ 0.771773] #PF: error_code(0x0000) - not-present page [ 0.772609] Oops: 0000 [#1] PREEMPT SMP PTI [ 0.774878] RIP: 0010:tty_open+0x268/0x6f0 [ 0.784013] chrdev_open+0xbd/0x230 [ 0.784444] ? cdev_device_add+0x80/0x80 [ 0.784920] do_dentry_open+0x1e0/0x410 [ 0.785389] path_openat+0xca9/0x1050 [ 0.785813] do_filp_open+0xaa/0x150 [ 0.786240] file_open_name+0x133/0x1b0 [ 0.786746] filp_open+0x27/0x50 [ 0.787244] console_on_rootfs+0x14/0x4d [ 0.787800] kernel_init_freeable+0x1e4/0x20d [ 0.788383] ? rest_init+0xc0/0xc0 [ 0.788881] kernel_init+0x11/0x120 [ 0.789356] ret_from_fork+0x22/0x30 Signed-off-by: Sven Schnelle Reviewed-by: Jiri Slaby Link: https://lore.kernel.org/r/20221209112737.3222509-2-svens@linux.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 3149114bf130..36fb945fdad4 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1224,14 +1224,16 @@ static struct tty_struct *tty_driver_lookup_tty(struct tty_driver *driver, { struct tty_struct *tty; - if (driver->ops->lookup) + if (driver->ops->lookup) { if (!file) tty = ERR_PTR(-EIO); else tty = driver->ops->lookup(driver, file, idx); - else + } else { + if (idx >= driver->num) + return ERR_PTR(-EINVAL); tty = driver->ttys[idx]; - + } if (!IS_ERR(tty)) tty_kref_get(tty); return tty; -- cgit v1.2.3 From 7370a25f9315e732ab7538d6c7e85208176d8fa2 Mon Sep 17 00:00:00 2001 From: Sven Schnelle Date: Fri, 9 Dec 2022 12:27:37 +0100 Subject: tty/vt: prevent registration of console with invalid number If a user specifies an invalid console like 'console=tty3000', the vt driver should prevent setting up a vt entry for that. Suggested-by: Jiri Slaby Signed-off-by: Sven Schnelle Link: https://lore.kernel.org/r/20221209112737.3222509-3-svens@linux.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 981d2bfcf9a5..62c8a45ad731 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -3156,8 +3156,14 @@ static struct tty_driver *vt_console_device(struct console *c, int *index) return console_driver; } +static int vt_console_setup(struct console *co, char *options) +{ + return co->index >= MAX_NR_CONSOLES ? -EINVAL : 0; +} + static struct console vt_console_driver = { .name = "tty", + .setup = vt_console_setup, .write = vt_console_print, .device = vt_console_device, .unblank = unblank_screen, -- cgit v1.2.3 From e1d91dda0bd1b96c10ea5d85fee94021c70dd55b Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Fri, 25 Nov 2022 18:19:51 +0800 Subject: tty: serial: fsl_lpuart: only enable Idle Line Interrupt for non-dma case For the lpuart driver, the Idle Line Interrupt Enable now is only needed for the CPU mode, so enable the UARTCTRL_ILIE at the correct place, and clear it when shutdown. Also need to configure the suitable UARTCTRL_IDLECFG, now the value is 0x7, represent 128 idle characters will trigger the Idle Line Interrupt. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20221125101953.18753-2-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 5e69fb73f570..9b8d32262f1e 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -5,6 +5,8 @@ * Copyright 2012-2014 Freescale Semiconductor, Inc. */ +#include +#include #include #include #include @@ -181,7 +183,7 @@ #define UARTCTRL_SBK 0x00010000 #define UARTCTRL_MA1IE 0x00008000 #define UARTCTRL_MA2IE 0x00004000 -#define UARTCTRL_IDLECFG 0x00000100 +#define UARTCTRL_IDLECFG GENMASK(10, 8) #define UARTCTRL_LOOPS 0x00000080 #define UARTCTRL_DOZEEN 0x00000040 #define UARTCTRL_RSRC 0x00000020 @@ -1523,7 +1525,7 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport) ctrl = lpuart32_read(&sport->port, UARTCTRL); ctrl_saved = ctrl; ctrl &= ~(UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_TE | - UARTCTRL_RIE | UARTCTRL_RE); + UARTCTRL_RIE | UARTCTRL_RE | UARTCTRL_ILIE); lpuart32_write(&sport->port, ctrl, UARTCTRL); /* enable FIFO mode */ @@ -1547,7 +1549,8 @@ static void lpuart32_setup_watermark_enable(struct lpuart_port *sport) lpuart32_setup_watermark(sport); temp = lpuart32_read(&sport->port, UARTCTRL); - temp |= UARTCTRL_RE | UARTCTRL_TE | UARTCTRL_ILIE; + temp |= UARTCTRL_RE | UARTCTRL_TE; + temp |= FIELD_PREP(UARTCTRL_IDLECFG, 0x7); lpuart32_write(&sport->port, temp, UARTCTRL); } @@ -1691,7 +1694,7 @@ static void lpuart32_configure(struct lpuart_port *sport) } temp = lpuart32_read(&sport->port, UARTCTRL); if (!sport->lpuart_dma_rx_use) - temp |= UARTCTRL_RIE; + temp |= UARTCTRL_RIE | UARTCTRL_ILIE; if (!sport->lpuart_dma_tx_use) temp |= UARTCTRL_TIE; lpuart32_write(&sport->port, temp, UARTCTRL); @@ -1798,7 +1801,7 @@ static void lpuart32_shutdown(struct uart_port *port) /* disable Rx/Tx and interrupts */ temp = lpuart32_read(port, UARTCTRL); - temp &= ~(UARTCTRL_TE | UARTCTRL_RE | + temp &= ~(UARTCTRL_TE | UARTCTRL_RE | UARTCTRL_ILIE | UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE); lpuart32_write(port, temp, UARTCTRL); -- cgit v1.2.3 From 1d4bd0e4ae4ba95892bef919a8d4d3f08f122d7e Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Fri, 25 Nov 2022 18:19:52 +0800 Subject: tty: serial: fsl_lpuart: disable Rx/Tx DMA in lpuart32_shutdown() UARTBAUD_RDMAE and UARTBAUD_TDMAE are enabled in lpuart32_startup(), but lpuart32_shutdown() not disable them, only free the dma ring buffer and release the dma channels, so here disable the Rx/Tx DMA first in lpuart32_shutdown(). Fixes: 42b68768e51b ("serial: fsl_lpuart: DMA support for 32-bit variant") Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20221125101953.18753-3-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 9b8d32262f1e..88697ddcd8c4 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1799,6 +1799,11 @@ static void lpuart32_shutdown(struct uart_port *port) spin_lock_irqsave(&port->lock, flags); + /* disable Rx/Tx DMA */ + temp = lpuart32_read(port, UARTBAUD); + temp &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE); + lpuart32_write(port, temp, UARTBAUD); + /* disable Rx/Tx and interrupts */ temp = lpuart32_read(port, UARTCTRL); temp &= ~(UARTCTRL_TE | UARTCTRL_RE | UARTCTRL_ILIE | -- cgit v1.2.3 From 4029dfc034febb54f6dd8ea83568accc943bc088 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Fri, 25 Nov 2022 18:19:53 +0800 Subject: tty: serial: fsl_lpuart: clear LPUART Status Register in lpuart32_shutdown() The LPUART Status Register needs to be cleared when closing the uart port to get a clean environment when reopening the uart. Fixes: 380c966c093e ("tty: serial: fsl_lpuart: add 32-bit register interface support") Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20221125101953.18753-4-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 88697ddcd8c4..8918e08bb19e 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1799,6 +1799,10 @@ static void lpuart32_shutdown(struct uart_port *port) spin_lock_irqsave(&port->lock, flags); + /* clear status */ + temp = lpuart32_read(&sport->port, UARTSTAT); + lpuart32_write(&sport->port, temp, UARTSTAT); + /* disable Rx/Tx DMA */ temp = lpuart32_read(port, UARTBAUD); temp &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE); -- cgit v1.2.3 From c4c81db5cf8bc53d6160c3abf26d382c841aa434 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Wed, 14 Dec 2022 11:11:35 +0800 Subject: tty: serial: fsl_lpuart: disable the CTS when send break signal LPUART IP has a bug that it treats the CTS as higher priority than the break signal, which cause the break signal sending through UARTCTRL_SBK may impacted by the CTS input if the HW flow control is enabled. Add this workaround patch to fix the IP bug, we can disable CTS before asserting SBK to avoid any interference from CTS, and re-enable it when break off. Such as for the bluetooth chip power save feature, host can let the BT chip get into sleep state by sending a UART break signal, and wake it up by turning off the UART break. If the BT chip enters the sleep mode successfully, it will pull up the CTS line, if the BT chip is woken up, it will pull down the CTS line. If without this workaround patch, the UART TX pin cannot send the break signal successfully as it affected by the BT CTS pin. After adding this patch, the BT power save feature can work well. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20221214031137.28815-2-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 8918e08bb19e..abe452f1a4bb 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1464,12 +1464,32 @@ static void lpuart_break_ctl(struct uart_port *port, int break_state) static void lpuart32_break_ctl(struct uart_port *port, int break_state) { - unsigned long temp; + unsigned long temp, modem; + struct tty_struct *tty; + unsigned int cflag = 0; + + tty = tty_port_tty_get(&port->state->port); + if (tty) { + cflag = tty->termios.c_cflag; + tty_kref_put(tty); + } temp = lpuart32_read(port, UARTCTRL) & ~UARTCTRL_SBK; + modem = lpuart32_read(port, UARTMODIR); - if (break_state != 0) + if (break_state != 0) { temp |= UARTCTRL_SBK; + /* + * LPUART CTS has higher priority than SBK, need to disable CTS before + * asserting SBK to avoid any interference if flow control is enabled. + */ + if (cflag & CRTSCTS && modem & UARTMODIR_TXCTSE) + lpuart32_write(port, modem & ~UARTMODIR_TXCTSE, UARTMODIR); + } else { + /* Re-enable the CTS when break off. */ + if (cflag & CRTSCTS && !(modem & UARTMODIR_TXCTSE)) + lpuart32_write(port, modem | UARTMODIR_TXCTSE, UARTMODIR); + } lpuart32_write(port, temp, UARTCTRL); } -- cgit v1.2.3 From 10929eac4144a656a966da69d8a5491395dc0a99 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Wed, 14 Dec 2022 11:11:36 +0800 Subject: tty: serial: fsl_lpuart: disable the break condition when shutdown the uart port Need to disable the break condition for lpuart driver when closing the uart port like other uart drivers do. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20221214031137.28815-3-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index abe452f1a4bb..63dff6184459 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1828,10 +1828,10 @@ static void lpuart32_shutdown(struct uart_port *port) temp &= ~(UARTBAUD_TDMAE | UARTBAUD_RDMAE); lpuart32_write(port, temp, UARTBAUD); - /* disable Rx/Tx and interrupts */ + /* disable Rx/Tx and interrupts and break condition */ temp = lpuart32_read(port, UARTCTRL); temp &= ~(UARTCTRL_TE | UARTCTRL_RE | UARTCTRL_ILIE | - UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE); + UARTCTRL_TIE | UARTCTRL_TCIE | UARTCTRL_RIE | UARTCTRL_SBK); lpuart32_write(port, temp, UARTCTRL); spin_unlock_irqrestore(&port->lock, flags); -- cgit v1.2.3 From 509597ebcac4d61fc012ea3ccd364581a8ca3926 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Wed, 14 Dec 2022 11:11:37 +0800 Subject: tty: serial: imx: disable the break condition when shutdown the uart port The comment in imx_uart_shutdown() says to disable the break condition, but it doesn't actually do that, here fix this by disabling UCR1_SNDBRK when closing the uart port like other uart drivers do. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20221214031137.28815-4-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 757825edb0cd..74c9e68fc3bd 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1564,7 +1564,8 @@ static void imx_uart_shutdown(struct uart_port *port) spin_lock_irqsave(&sport->port.lock, flags); ucr1 = imx_uart_readl(sport, UCR1); - ucr1 &= ~(UCR1_TRDYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_RXDMAEN | UCR1_ATDMAEN); + ucr1 &= ~(UCR1_TRDYEN | UCR1_RRDYEN | UCR1_RTSDEN | UCR1_RXDMAEN | + UCR1_ATDMAEN | UCR1_SNDBRK); /* See SER_RS485_ENABLED/UTS_LOOP comment in imx_uart_probe() */ if (port->rs485.flags & SER_RS485_ENABLED && port->rs485.flags & SER_RS485_RTS_ON_SEND && -- cgit v1.2.3 From 885692ae3c17e6ef3962c826eea6bcfe871d8e5a Mon Sep 17 00:00:00 2001 From: Nate Drude Date: Thu, 22 Dec 2022 08:56:34 -0600 Subject: tty: serial: fsl_lpuart: increase maximum uart_nr to eight Some SoCs like the i.MX93 have aliases for up to eight UARTs, see: https://github.com/torvalds/linux/blob/v6.1/arch/arm64/boot/dts/freescale/imx93.dtsi#L31-L38 Increase UART_NR from 6 to 8 to support lpuart7 and lpuart8 and avoid initialization failures like the following: [ 0.837146] fsl-lpuart 42690000.serial: serial6 out of range [ 0.842814] fsl-lpuart: probe of 42690000.serial failed with error -22 Signed-off-by: Nate Drude Reviewed-by: Sherry Sun Link: https://lore.kernel.org/r/20221222145634.2217793-1-nate.d@variscite.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 63dff6184459..04fecff2fa5f 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -240,7 +240,7 @@ #define DRIVER_NAME "fsl-lpuart" #define DEV_NAME "ttyLP" -#define UART_NR 6 +#define UART_NR 8 /* IMX lpuart has four extra unused regs located at the beginning */ #define IMX_REG_OFF 0x10 -- cgit v1.2.3 From 3831c2a454a1034944374391526515bd7debb1e4 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:26 +0100 Subject: tty: vt: remove vc_uniscr_debug_check() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit VC_UNI_SCREEN_DEBUG is always defined as 0, so this code is never executed. Drop it along with VC_UNI_SCREEN_DEBUG. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-1-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 40 ---------------------------------------- 1 file changed, 40 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 62c8a45ad731..a51e87578902 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -323,8 +323,6 @@ void schedule_console_callback(void) #define get_vc_uniscr(vc) vc->vc_uni_screen #endif -#define VC_UNI_SCREEN_DEBUG 0 - typedef uint32_t char32_t; /* @@ -580,43 +578,6 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, } } -/* this is for validation and debugging only */ -static void vc_uniscr_debug_check(struct vc_data *vc) -{ - struct uni_screen *uniscr = get_vc_uniscr(vc); - unsigned short *p; - int x, y, mask; - - if (!VC_UNI_SCREEN_DEBUG || !uniscr) - return; - - WARN_CONSOLE_UNLOCKED(); - - /* - * Make sure our unicode screen translates into the same glyphs - * as the actual screen. This is brutal indeed. - */ - p = (unsigned short *)vc->vc_origin; - mask = vc->vc_hi_font_mask | 0xff; - for (y = 0; y < vc->vc_rows; y++) { - char32_t *line = uniscr->lines[y]; - for (x = 0; x < vc->vc_cols; x++) { - u16 glyph = scr_readw(p++) & mask; - char32_t uc = line[x]; - int tc = conv_uni_to_pc(vc, uc); - if (tc == -4) - tc = conv_uni_to_pc(vc, 0xfffd); - if (tc == -4) - tc = conv_uni_to_pc(vc, '?'); - if (tc != glyph) - pr_err_ratelimited( - "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n", - __func__, x, y, glyph, tc); - } - } -} - - static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b, enum con_scroll dir, unsigned int nr) { @@ -2959,7 +2920,6 @@ rescan_last_byte: goto rescan_last_byte; } con_flush(vc, &draw); - vc_uniscr_debug_check(vc); console_conditional_schedule(); notify_update(vc); console_unlock(); -- cgit v1.2.3 From 3b140fbbbb18ffcfa3906229789aa417a5af35b3 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:27 +0100 Subject: tty: vt: drop get_vc_uniscr() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Its definition depends on the NO_VC_UNI_SCREEN macro. But that is never defined, so remove all this completely. I.e. expand the macro to vc->vc_uni_screen everywhere. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-2-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 27 ++++++++++----------------- 1 file changed, 10 insertions(+), 17 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index a51e87578902..a8fa63cd3d93 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -316,13 +316,6 @@ void schedule_console_callback(void) * Code to manage unicode-based screen buffers */ -#ifdef NO_VC_UNI_SCREEN -/* this disables and optimizes related code away at compile time */ -#define get_vc_uniscr(vc) NULL -#else -#define get_vc_uniscr(vc) vc->vc_uni_screen -#endif - typedef uint32_t char32_t; /* @@ -369,7 +362,7 @@ static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr) static void vc_uniscr_putc(struct vc_data *vc, char32_t uc) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) uniscr->lines[vc->state.y][vc->state.x] = uc; @@ -377,7 +370,7 @@ static void vc_uniscr_putc(struct vc_data *vc, char32_t uc) static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { char32_t *ln = uniscr->lines[vc->state.y]; @@ -390,7 +383,7 @@ static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { char32_t *ln = uniscr->lines[vc->state.y]; @@ -404,7 +397,7 @@ static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, unsigned int nr) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { char32_t *ln = uniscr->lines[vc->state.y]; @@ -416,7 +409,7 @@ static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, unsigned int nr) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { unsigned int cols = vc->vc_cols; @@ -429,7 +422,7 @@ static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, enum con_scroll dir, unsigned int nr) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { unsigned int i, j, k, sz, d, clear; @@ -545,7 +538,7 @@ int vc_uniscr_check(struct vc_data *vc) void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, unsigned int row, unsigned int col, unsigned int nr) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; int offset = row * vc->vc_size_row + col * 2; unsigned long pos; @@ -1206,7 +1199,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, if (!newscreen) return -ENOMEM; - if (get_vc_uniscr(vc)) { + if (vc->vc_uni_screen) { new_uniscr = vc_uniscr_alloc(new_cols, new_rows); if (!new_uniscr) { kfree(newscreen); @@ -1258,7 +1251,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, end = old_origin + old_row_size * min(old_rows, new_rows); vc_uniscr_copy_area(new_uniscr, new_cols, new_rows, - get_vc_uniscr(vc), rlth/2, first_copied_row, + vc->vc_uni_screen, rlth/2, first_copied_row, min(old_rows, new_rows)); vc_uniscr_set(vc, new_uniscr); @@ -4706,7 +4699,7 @@ EXPORT_SYMBOL_GPL(screen_glyph); u32 screen_glyph_unicode(const struct vc_data *vc, int n) { - struct uni_screen *uniscr = get_vc_uniscr(vc); + struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; -- cgit v1.2.3 From 70caeac76d1c3274f3bd16093c5a5f61517ab2a2 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:28 +0100 Subject: tty: vt: remove reference to undefined NO_VC_UNI_SCREEN MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit NO_VC_UNI_SCREEN is defined nowhere. Remove the last reference to it. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-3-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 3 --- 1 file changed, 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index a8fa63cd3d93..85eaa17e37fb 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -495,9 +495,6 @@ int vc_uniscr_check(struct vc_data *vc) unsigned short *p; int x, y, mask; - if (__is_defined(NO_VC_UNI_SCREEN)) - return -EOPNOTSUPP; - WARN_CONSOLE_UNLOCKED(); if (!vc->vc_utf) -- cgit v1.2.3 From 4ba77bfbad9e85a629f1e126f86ed4f3b5f09f83 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:29 +0100 Subject: tty: vt: use sizeof(*variable) where possible Instead of sizeof(type), use sizeof(*variable) which is preferred. We are going to remove the unicode's char32_t typedef, so this makes the switch easier. Signed-off-by: Jiri Slaby (SUSE) Link: https://lore.kernel.org/r/20230112080136.4929-4-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 85eaa17e37fb..3b3213f7478a 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -330,11 +330,11 @@ static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) { struct uni_screen *uniscr; void *p; - unsigned int memsize, i; + unsigned int memsize, i, col_size = cols * sizeof(**uniscr->lines); /* allocate everything in one go */ - memsize = cols * rows * sizeof(char32_t); - memsize += rows * sizeof(char32_t *); + memsize = col_size * rows; + memsize += rows * sizeof(*uniscr->lines); p = vzalloc(memsize); if (!p) return NULL; @@ -344,7 +344,7 @@ static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) p = uniscr->lines + rows; for (i = 0; i < rows; i++) { uniscr->lines[i] = p; - p += cols * sizeof(char32_t); + p += col_size; } return uniscr; } @@ -469,7 +469,7 @@ static void vc_uniscr_copy_area(struct uni_screen *dst, char32_t *src_line = src->lines[src_top_row]; char32_t *dst_line = dst->lines[dst_row]; - memcpy(dst_line, src_line, src_cols * sizeof(char32_t)); + memcpy(dst_line, src_line, src_cols * sizeof(*src_line)); if (dst_cols - src_cols) memset32(dst_line + src_cols, ' ', dst_cols - src_cols); src_top_row++; -- cgit v1.2.3 From 0c8414a68272d98889e21f8d130dc6e03689c289 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:30 +0100 Subject: tty: vt: remove char32_t typedef MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It boils down to uint32_t, so use u32 directly, instead. This makes the code more obvious. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-5-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 26 ++++++++++++-------------- 1 file changed, 12 insertions(+), 14 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 3b3213f7478a..4a0ea4cf7752 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -316,14 +316,12 @@ void schedule_console_callback(void) * Code to manage unicode-based screen buffers */ -typedef uint32_t char32_t; - /* * Our screen buffer is preceded by an array of line pointers so that * scrolling only implies some pointer shuffling. */ struct uni_screen { - char32_t *lines[0]; + u32 *lines[0]; }; static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) @@ -360,7 +358,7 @@ static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr) vc->vc_uni_screen = new_uniscr; } -static void vc_uniscr_putc(struct vc_data *vc, char32_t uc) +static void vc_uniscr_putc(struct vc_data *vc, u32 uc) { struct uni_screen *uniscr = vc->vc_uni_screen; @@ -373,7 +371,7 @@ static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { - char32_t *ln = uniscr->lines[vc->state.y]; + u32 *ln = uniscr->lines[vc->state.y]; unsigned int x = vc->state.x, cols = vc->vc_cols; memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln)); @@ -386,7 +384,7 @@ static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { - char32_t *ln = uniscr->lines[vc->state.y]; + u32 *ln = uniscr->lines[vc->state.y]; unsigned int x = vc->state.x, cols = vc->vc_cols; memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln)); @@ -400,7 +398,7 @@ static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, struct uni_screen *uniscr = vc->vc_uni_screen; if (uniscr) { - char32_t *ln = uniscr->lines[vc->state.y]; + u32 *ln = uniscr->lines[vc->state.y]; memset32(&ln[x], ' ', nr); } @@ -435,7 +433,7 @@ static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, d = sz - nr; } for (i = 0; i < gcd(d, sz); i++) { - char32_t *tmp = uniscr->lines[t + i]; + u32 *tmp = uniscr->lines[t + i]; j = i; while (1) { k = j + d; @@ -466,8 +464,8 @@ static void vc_uniscr_copy_area(struct uni_screen *dst, return; while (src_top_row < src_bot_row) { - char32_t *src_line = src->lines[src_top_row]; - char32_t *dst_line = dst->lines[dst_row]; + u32 *src_line = src->lines[src_top_row]; + u32 *dst_line = dst->lines[dst_row]; memcpy(dst_line, src_line, src_cols * sizeof(*src_line)); if (dst_cols - src_cols) @@ -476,7 +474,7 @@ static void vc_uniscr_copy_area(struct uni_screen *dst, dst_row++; } while (dst_row < dst_rows) { - char32_t *dst_line = dst->lines[dst_row]; + u32 *dst_line = dst->lines[dst_row]; memset32(dst_line, ' ', dst_cols); dst_row++; @@ -516,7 +514,7 @@ int vc_uniscr_check(struct vc_data *vc) p = (unsigned short *)vc->vc_origin; mask = vc->vc_hi_font_mask | 0xff; for (y = 0; y < vc->vc_rows; y++) { - char32_t *line = uniscr->lines[y]; + u32 *line = uniscr->lines[y]; for (x = 0; x < vc->vc_cols; x++) { u16 glyph = scr_readw(p++) & mask; line[x] = inverse_translate(vc, glyph, true); @@ -550,7 +548,7 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, */ row = (pos - vc->vc_origin) / vc->vc_size_row; col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2; - memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t)); + memcpy(dest, &uniscr->lines[row][col], nr * sizeof(u32)); } else { /* * Scrollback is active. For now let's simply backtranslate @@ -560,7 +558,7 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, */ u16 *p = (u16 *)pos; int mask = vc->vc_hi_font_mask | 0xff; - char32_t *uni_buf = dest; + u32 *uni_buf = dest; while (nr--) { u16 glyph = scr_readw(p++) & mask; *uni_buf++ = inverse_translate(vc, glyph, true); -- cgit v1.2.3 From feb36abbedea2644bf31693aa287a33a3a9fbd7c Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:31 +0100 Subject: tty: vt: remove struct uni_screen MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It contains only lines with pointers to characters (u32s). So use simple clear 'u32 **lines' all over the code. This avoids zero-length arrays. It also makes the allocation less error-prone (size of the struct wasn't taken into account at all). Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-6-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 117 ++++++++++++++++++++++++++-------------------------- 1 file changed, 58 insertions(+), 59 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 4a0ea4cf7752..0487d7d20f73 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -320,58 +320,55 @@ void schedule_console_callback(void) * Our screen buffer is preceded by an array of line pointers so that * scrolling only implies some pointer shuffling. */ -struct uni_screen { - u32 *lines[0]; -}; -static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows) +static u32 **vc_uniscr_alloc(unsigned int cols, unsigned int rows) { - struct uni_screen *uniscr; + u32 **uni_lines; void *p; - unsigned int memsize, i, col_size = cols * sizeof(**uniscr->lines); + unsigned int memsize, i, col_size = cols * sizeof(**uni_lines); /* allocate everything in one go */ memsize = col_size * rows; - memsize += rows * sizeof(*uniscr->lines); - p = vzalloc(memsize); - if (!p) + memsize += rows * sizeof(*uni_lines); + uni_lines = vzalloc(memsize); + if (!uni_lines) return NULL; /* initial line pointers */ - uniscr = p; - p = uniscr->lines + rows; + p = uni_lines + rows; for (i = 0; i < rows; i++) { - uniscr->lines[i] = p; + uni_lines[i] = p; p += col_size; } - return uniscr; + + return uni_lines; } -static void vc_uniscr_free(struct uni_screen *uniscr) +static void vc_uniscr_free(u32 **uni_lines) { - vfree(uniscr); + vfree(uni_lines); } -static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr) +static void vc_uniscr_set(struct vc_data *vc, u32 **new_uni_lines) { - vc_uniscr_free(vc->vc_uni_screen); - vc->vc_uni_screen = new_uniscr; + vc_uniscr_free(vc->vc_uni_lines); + vc->vc_uni_lines = new_uni_lines; } static void vc_uniscr_putc(struct vc_data *vc, u32 uc) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; - if (uniscr) - uniscr->lines[vc->state.y][vc->state.x] = uc; + if (uni_lines) + uni_lines[vc->state.y][vc->state.x] = uc; } static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; - if (uniscr) { - u32 *ln = uniscr->lines[vc->state.y]; + if (uni_lines) { + u32 *ln = uni_lines[vc->state.y]; unsigned int x = vc->state.x, cols = vc->vc_cols; memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln)); @@ -381,10 +378,10 @@ static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; - if (uniscr) { - u32 *ln = uniscr->lines[vc->state.y]; + if (uni_lines) { + u32 *ln = uni_lines[vc->state.y]; unsigned int x = vc->state.x, cols = vc->vc_cols; memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln)); @@ -395,10 +392,10 @@ static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, unsigned int nr) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; - if (uniscr) { - u32 *ln = uniscr->lines[vc->state.y]; + if (uni_lines) { + u32 *ln = uni_lines[vc->state.y]; memset32(&ln[x], ' ', nr); } @@ -407,22 +404,22 @@ static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, unsigned int nr) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; - if (uniscr) { + if (uni_lines) { unsigned int cols = vc->vc_cols; while (nr--) - memset32(uniscr->lines[y++], ' ', cols); + memset32(uni_lines[y++], ' ', cols); } } static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, enum con_scroll dir, unsigned int nr) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; - if (uniscr) { + if (uni_lines) { unsigned int i, j, k, sz, d, clear; sz = b - t; @@ -433,7 +430,7 @@ static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, d = sz - nr; } for (i = 0; i < gcd(d, sz); i++) { - u32 *tmp = uniscr->lines[t + i]; + u32 *tmp = uni_lines[t + i]; j = i; while (1) { k = j + d; @@ -441,31 +438,31 @@ static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, k -= sz; if (k == i) break; - uniscr->lines[t + j] = uniscr->lines[t + k]; + uni_lines[t + j] = uni_lines[t + k]; j = k; } - uniscr->lines[t + j] = tmp; + uni_lines[t + j] = tmp; } vc_uniscr_clear_lines(vc, clear, nr); } } -static void vc_uniscr_copy_area(struct uni_screen *dst, +static void vc_uniscr_copy_area(u32 **dst_lines, unsigned int dst_cols, unsigned int dst_rows, - struct uni_screen *src, + u32 **src_lines, unsigned int src_cols, unsigned int src_top_row, unsigned int src_bot_row) { unsigned int dst_row = 0; - if (!dst) + if (!dst_lines) return; while (src_top_row < src_bot_row) { - u32 *src_line = src->lines[src_top_row]; - u32 *dst_line = dst->lines[dst_row]; + u32 *src_line = src_lines[src_top_row]; + u32 *dst_line = dst_lines[dst_row]; memcpy(dst_line, src_line, src_cols * sizeof(*src_line)); if (dst_cols - src_cols) @@ -474,7 +471,7 @@ static void vc_uniscr_copy_area(struct uni_screen *dst, dst_row++; } while (dst_row < dst_rows) { - u32 *dst_line = dst->lines[dst_row]; + u32 *dst_line = dst_lines[dst_row]; memset32(dst_line, ' ', dst_cols); dst_row++; @@ -489,7 +486,7 @@ static void vc_uniscr_copy_area(struct uni_screen *dst, */ int vc_uniscr_check(struct vc_data *vc) { - struct uni_screen *uniscr; + u32 **uni_lines; unsigned short *p; int x, y, mask; @@ -498,11 +495,11 @@ int vc_uniscr_check(struct vc_data *vc) if (!vc->vc_utf) return -ENODATA; - if (vc->vc_uni_screen) + if (vc->vc_uni_lines) return 0; - uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows); - if (!uniscr) + uni_lines = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows); + if (!uni_lines) return -ENOMEM; /* @@ -514,14 +511,15 @@ int vc_uniscr_check(struct vc_data *vc) p = (unsigned short *)vc->vc_origin; mask = vc->vc_hi_font_mask | 0xff; for (y = 0; y < vc->vc_rows; y++) { - u32 *line = uniscr->lines[y]; + u32 *line = uni_lines[y]; for (x = 0; x < vc->vc_cols; x++) { u16 glyph = scr_readw(p++) & mask; line[x] = inverse_translate(vc, glyph, true); } } - vc->vc_uni_screen = uniscr; + vc->vc_uni_lines = uni_lines; + return 0; } @@ -533,11 +531,11 @@ int vc_uniscr_check(struct vc_data *vc) void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, unsigned int row, unsigned int col, unsigned int nr) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; int offset = row * vc->vc_size_row + col * 2; unsigned long pos; - BUG_ON(!uniscr); + BUG_ON(!uni_lines); pos = (unsigned long)screenpos(vc, offset, viewed); if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { @@ -548,7 +546,7 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, */ row = (pos - vc->vc_origin) / vc->vc_size_row; col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2; - memcpy(dest, &uniscr->lines[row][col], nr * sizeof(u32)); + memcpy(dest, &uni_lines[row][col], nr * sizeof(u32)); } else { /* * Scrollback is active. For now let's simply backtranslate @@ -1150,7 +1148,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, unsigned int new_cols, new_rows, new_row_size, new_screen_size; unsigned int user; unsigned short *oldscreen, *newscreen; - struct uni_screen *new_uniscr = NULL; + u32 **new_uniscr = NULL; WARN_CONSOLE_UNLOCKED(); @@ -1194,7 +1192,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, if (!newscreen) return -ENOMEM; - if (vc->vc_uni_screen) { + if (vc->vc_uni_lines) { new_uniscr = vc_uniscr_alloc(new_cols, new_rows); if (!new_uniscr) { kfree(newscreen); @@ -1246,7 +1244,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, end = old_origin + old_row_size * min(old_rows, new_rows); vc_uniscr_copy_area(new_uniscr, new_cols, new_rows, - vc->vc_uni_screen, rlth/2, first_copied_row, + vc->vc_uni_lines, rlth/2, first_copied_row, min(old_rows, new_rows)); vc_uniscr_set(vc, new_uniscr); @@ -4694,10 +4692,11 @@ EXPORT_SYMBOL_GPL(screen_glyph); u32 screen_glyph_unicode(const struct vc_data *vc, int n) { - struct uni_screen *uniscr = vc->vc_uni_screen; + u32 **uni_lines = vc->vc_uni_lines; + + if (uni_lines) + return uni_lines[n / vc->vc_cols][n % vc->vc_cols]; - if (uniscr) - return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols]; return inverse_translate(vc, screen_glyph(vc, n * 2), true); } EXPORT_SYMBOL_GPL(screen_glyph_unicode); -- cgit v1.2.3 From 441c938168afdb747801d22adc1f2f21b5e204d7 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:32 +0100 Subject: tty: vt: replace BUG_ON() by WARN_ON_ONCE() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit No need to panic in vc_uniscr_copy_line(), just warn. This should never happen though, as vc_uniscr_check() is supposed to be called before vc_uniscr_copy_line(). And the former checks vc->vc_uni_lines already. In any case, use _ONCE as vc_uniscr_copy_line() is called repeatedly for each line. So don't flood the logs, just in case. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-7-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 0487d7d20f73..f81f77464f85 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -535,7 +535,8 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, int offset = row * vc->vc_size_row + col * 2; unsigned long pos; - BUG_ON(!uni_lines); + if (WARN_ON_ONCE(!uni_lines)) + return; pos = (unsigned long)screenpos(vc, offset, viewed); if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { -- cgit v1.2.3 From 287696d5b4112bb7d78bdeda713cc44f93f30765 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:33 +0100 Subject: tty: vt: simplify some unicode conditions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit After previous patches, we can simply test vc->vc_uni_lines, so do so in many unicode functions. This makes the code more compact. And even use if (!) return; in vc_uniscr_scroll(), so that the whole code is indented on the left. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-8-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 85 +++++++++++++++++++++++------------------------------ 1 file changed, 36 insertions(+), 49 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index f81f77464f85..40d71cfdec32 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -357,18 +357,14 @@ static void vc_uniscr_set(struct vc_data *vc, u32 **new_uni_lines) static void vc_uniscr_putc(struct vc_data *vc, u32 uc) { - u32 **uni_lines = vc->vc_uni_lines; - - if (uni_lines) - uni_lines[vc->state.y][vc->state.x] = uc; + if (vc->vc_uni_lines) + vc->vc_uni_lines[vc->state.y][vc->state.x] = uc; } static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) { - u32 **uni_lines = vc->vc_uni_lines; - - if (uni_lines) { - u32 *ln = uni_lines[vc->state.y]; + if (vc->vc_uni_lines) { + u32 *ln = vc->vc_uni_lines[vc->state.y]; unsigned int x = vc->state.x, cols = vc->vc_cols; memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln)); @@ -378,10 +374,8 @@ static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr) static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) { - u32 **uni_lines = vc->vc_uni_lines; - - if (uni_lines) { - u32 *ln = uni_lines[vc->state.y]; + if (vc->vc_uni_lines) { + u32 *ln = vc->vc_uni_lines[vc->state.y]; unsigned int x = vc->state.x, cols = vc->vc_cols; memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln)); @@ -392,59 +386,52 @@ static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr) static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x, unsigned int nr) { - u32 **uni_lines = vc->vc_uni_lines; - - if (uni_lines) { - u32 *ln = uni_lines[vc->state.y]; - - memset32(&ln[x], ' ', nr); - } + if (vc->vc_uni_lines) + memset32(&vc->vc_uni_lines[vc->state.y][x], ' ', nr); } static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, unsigned int nr) { - u32 **uni_lines = vc->vc_uni_lines; - - if (uni_lines) { - unsigned int cols = vc->vc_cols; - + if (vc->vc_uni_lines) while (nr--) - memset32(uni_lines[y++], ' ', cols); - } + memset32(vc->vc_uni_lines[y++], ' ', vc->vc_cols); } static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, enum con_scroll dir, unsigned int nr) { u32 **uni_lines = vc->vc_uni_lines; + unsigned int i, j, k, sz, d, clear; - if (uni_lines) { - unsigned int i, j, k, sz, d, clear; + if (!uni_lines) + return; - sz = b - t; - clear = b - nr; - d = nr; - if (dir == SM_DOWN) { - clear = t; - d = sz - nr; - } - for (i = 0; i < gcd(d, sz); i++) { - u32 *tmp = uni_lines[t + i]; - j = i; - while (1) { - k = j + d; - if (k >= sz) - k -= sz; - if (k == i) - break; - uni_lines[t + j] = uni_lines[t + k]; - j = k; - } - uni_lines[t + j] = tmp; + sz = b - t; + clear = b - nr; + d = nr; + + if (dir == SM_DOWN) { + clear = t; + d = sz - nr; + } + + for (i = 0; i < gcd(d, sz); i++) { + u32 *tmp = uni_lines[t + i]; + j = i; + while (1) { + k = j + d; + if (k >= sz) + k -= sz; + if (k == i) + break; + uni_lines[t + j] = uni_lines[t + k]; + j = k; } - vc_uniscr_clear_lines(vc, clear, nr); + uni_lines[t + j] = tmp; } + + vc_uniscr_clear_lines(vc, clear, nr); } static void vc_uniscr_copy_area(u32 **dst_lines, -- cgit v1.2.3 From 8aad24ad9d0498747e55aa89879a96cedb926be2 Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:34 +0100 Subject: tty: vt: separate array juggling to juggle_array() The algorithm used for scrolling is the array juggling. It has complexity O(N) and space complexity O(1). I.e. quite fast w/o requirements for temporary storage. Move the algorithm to a separate function so it is obvious what it is. It is almost generic (except the array type), so if anyone else wants array rotation, feel free to make it generic and move it to include/. And rename all the variables from i, j, k, sz, d, and so on to something saner. Signed-off-by: Jiri Slaby (SUSE) Link: https://lore.kernel.org/r/20230112080136.4929-9-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 52 ++++++++++++++++++++++++++++------------------------ 1 file changed, 28 insertions(+), 24 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 40d71cfdec32..f5d71f0ead59 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -398,40 +398,44 @@ static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y, memset32(vc->vc_uni_lines[y++], ' ', vc->vc_cols); } +/* juggling array rotation algorithm (complexity O(N), size complexity O(1)) */ +static void juggle_array(u32 **array, unsigned int size, unsigned int nr) +{ + unsigned int gcd_idx; + + for (gcd_idx = 0; gcd_idx < gcd(nr, size); gcd_idx++) { + u32 *gcd_idx_val = array[gcd_idx]; + unsigned int dst_idx = gcd_idx; + + while (1) { + unsigned int src_idx = (dst_idx + nr) % size; + if (src_idx == gcd_idx) + break; + + array[dst_idx] = array[src_idx]; + dst_idx = src_idx; + } + + array[dst_idx] = gcd_idx_val; + } +} + static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, enum con_scroll dir, unsigned int nr) { u32 **uni_lines = vc->vc_uni_lines; - unsigned int i, j, k, sz, d, clear; + unsigned int size = b - t; if (!uni_lines) return; - sz = b - t; - clear = b - nr; - d = nr; - if (dir == SM_DOWN) { - clear = t; - d = sz - nr; - } - - for (i = 0; i < gcd(d, sz); i++) { - u32 *tmp = uni_lines[t + i]; - j = i; - while (1) { - k = j + d; - if (k >= sz) - k -= sz; - if (k == i) - break; - uni_lines[t + j] = uni_lines[t + k]; - j = k; - } - uni_lines[t + j] = tmp; + juggle_array(&uni_lines[top], size, size - nr); + vc_uniscr_clear_lines(vc, t, nr); + } else { + juggle_array(&uni_lines[top], size, nr); + vc_uniscr_clear_lines(vc, b - nr, nr); } - - vc_uniscr_clear_lines(vc, clear, nr); } static void vc_uniscr_copy_area(u32 **dst_lines, -- cgit v1.2.3 From 424c82af26b1b8ca6c0be06987a4e6d18c9a92dd Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:35 +0100 Subject: tty: vt: saner names for more scroll variables MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Rename more variables (t, b, s, d) -> (top, bottom, src, dst) to make them more obvious. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-10-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 40 ++++++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 18 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index f5d71f0ead59..e3f62fffbdd5 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -420,21 +420,22 @@ static void juggle_array(u32 **array, unsigned int size, unsigned int nr) } } -static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b, - enum con_scroll dir, unsigned int nr) +static void vc_uniscr_scroll(struct vc_data *vc, unsigned int top, + unsigned int bottom, enum con_scroll dir, + unsigned int nr) { u32 **uni_lines = vc->vc_uni_lines; - unsigned int size = b - t; + unsigned int size = bottom - top; if (!uni_lines) return; if (dir == SM_DOWN) { juggle_array(&uni_lines[top], size, size - nr); - vc_uniscr_clear_lines(vc, t, nr); + vc_uniscr_clear_lines(vc, top, nr); } else { juggle_array(&uni_lines[top], size, nr); - vc_uniscr_clear_lines(vc, b - nr, nr); + vc_uniscr_clear_lines(vc, bottom - nr, nr); } } @@ -556,27 +557,30 @@ void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed, } } -static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b, - enum con_scroll dir, unsigned int nr) +static void con_scroll(struct vc_data *vc, unsigned int top, + unsigned int bottom, enum con_scroll dir, + unsigned int nr) { - u16 *clear, *d, *s; + u16 *clear, *dst, *src; - if (t + nr >= b) - nr = b - t - 1; - if (b > vc->vc_rows || t >= b || nr < 1) + if (top + nr >= bottom) + nr = bottom - top - 1; + if (bottom > vc->vc_rows || top >= bottom || nr < 1) return; - vc_uniscr_scroll(vc, t, b, dir, nr); - if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr)) + + vc_uniscr_scroll(vc, top, bottom, dir, nr); + if (con_is_visible(vc) && + vc->vc_sw->con_scroll(vc, top, bottom, dir, nr)) return; - s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t); - d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr)); + src = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * top); + dst = (u16 *)(vc->vc_origin + vc->vc_size_row * (top + nr)); if (dir == SM_UP) { - clear = s + (b - t - nr) * vc->vc_cols; - swap(s, d); + clear = src + (bottom - top - nr) * vc->vc_cols; + swap(src, dst); } - scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); + scr_memmovew(dst, src, (bottom - top - nr) * vc->vc_size_row); scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr); } -- cgit v1.2.3 From bf8baa00668dbc4fcfca5ac49ae8a3059c795e4e Mon Sep 17 00:00:00 2001 From: "Jiri Slaby (SUSE)" Date: Thu, 12 Jan 2023 09:01:36 +0100 Subject: tty: vt: cache row count in con_scroll() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit It's used on few places, so make the code easier to follow by caching the subtraction result. Signed-off-by: Jiri Slaby (SUSE) Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230112080136.4929-11-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index e3f62fffbdd5..71f182416835 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -561,10 +561,11 @@ static void con_scroll(struct vc_data *vc, unsigned int top, unsigned int bottom, enum con_scroll dir, unsigned int nr) { + unsigned int rows = bottom - top; u16 *clear, *dst, *src; if (top + nr >= bottom) - nr = bottom - top - 1; + nr = rows - 1; if (bottom > vc->vc_rows || top >= bottom || nr < 1) return; @@ -577,10 +578,10 @@ static void con_scroll(struct vc_data *vc, unsigned int top, dst = (u16 *)(vc->vc_origin + vc->vc_size_row * (top + nr)); if (dir == SM_UP) { - clear = src + (bottom - top - nr) * vc->vc_cols; + clear = src + (rows - nr) * vc->vc_cols; swap(src, dst); } - scr_memmovew(dst, src, (bottom - top - nr) * vc->vc_size_row); + scr_memmovew(dst, src, (rows - nr) * vc->vc_size_row); scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr); } -- cgit v1.2.3 From d8aca2f96813d51df574a811eda9a2cbed00f261 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:17 +0100 Subject: tty: serial: qcom-geni-serial: stop operations in progress at shutdown We don't stop transmissions in progress at shutdown. This is fine with FIFO SE mode but with DMA (support for which we'll introduce later) it causes trouble so fix it now. Fixes: e83766334f96 ("tty: serial: qcom_geni_serial: No need to stop tx/rx on UART shutdown") Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-2-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index b487823f0e61..4f4c12f3c433 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -880,6 +880,8 @@ static void get_tx_fifo_size(struct qcom_geni_serial_port *port) static void qcom_geni_serial_shutdown(struct uart_port *uport) { disable_irq(uport->irq); + qcom_geni_serial_stop_tx(uport); + qcom_geni_serial_stop_rx(uport); } static int qcom_geni_serial_port_setup(struct uart_port *uport) -- cgit v1.2.3 From d0fabb0dc1a6237fc93250114916abc3fb286e98 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:18 +0100 Subject: tty: serial: qcom-geni-serial: drop unneeded forward definitions If we shuffle the code a bit, we can drop all forward definitions of various static functions. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-3-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 79 ++++++++++++++++------------------- 1 file changed, 37 insertions(+), 42 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 4f4c12f3c433..31e0faf702a3 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -147,11 +147,6 @@ static const struct uart_ops qcom_geni_console_pops; static const struct uart_ops qcom_geni_uart_pops; static struct uart_driver qcom_geni_console_driver; static struct uart_driver qcom_geni_uart_driver; -static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop); -static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop); -static unsigned int qcom_geni_serial_tx_empty(struct uart_port *port); -static void qcom_geni_serial_stop_rx(struct uart_port *uport); -static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop); #define to_dev_port(ptr, member) \ container_of(ptr, struct qcom_geni_serial_port, member) @@ -590,6 +585,11 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) return ret; } +static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport) +{ + return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS); +} + static void qcom_geni_serial_start_tx(struct uart_port *uport) { u32 irq_en; @@ -635,25 +635,29 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport) writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); } -static void qcom_geni_serial_start_rx(struct uart_port *uport) +static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) { - u32 irq_en; u32 status; + u32 word_cnt; + u32 last_word_byte_cnt; + u32 last_word_partial; + u32 total_bytes; struct qcom_geni_serial_port *port = to_dev_port(uport, uport); - status = readl(uport->membase + SE_GENI_STATUS); - if (status & S_GENI_CMD_ACTIVE) - qcom_geni_serial_stop_rx(uport); - - geni_se_setup_s_cmd(&port->se, UART_START_READ, 0); - - irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN); - irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN; - writel(irq_en, uport->membase + SE_GENI_S_IRQ_EN); + status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS); + word_cnt = status & RX_FIFO_WC_MSK; + last_word_partial = status & RX_LAST; + last_word_byte_cnt = (status & RX_LAST_BYTE_VALID_MSK) >> + RX_LAST_BYTE_VALID_SHFT; - irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); - irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN; - writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); + if (!word_cnt) + return; + total_bytes = BYTES_PER_FIFO_WORD * (word_cnt - 1); + if (last_word_partial && last_word_byte_cnt) + total_bytes += last_word_byte_cnt; + else + total_bytes += BYTES_PER_FIFO_WORD; + port->handle_rx(uport, total_bytes, drop); } static void qcom_geni_serial_stop_rx(struct uart_port *uport) @@ -694,29 +698,25 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport) qcom_geni_serial_abort_rx(uport); } -static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) +static void qcom_geni_serial_start_rx(struct uart_port *uport) { + u32 irq_en; u32 status; - u32 word_cnt; - u32 last_word_byte_cnt; - u32 last_word_partial; - u32 total_bytes; struct qcom_geni_serial_port *port = to_dev_port(uport, uport); - status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS); - word_cnt = status & RX_FIFO_WC_MSK; - last_word_partial = status & RX_LAST; - last_word_byte_cnt = (status & RX_LAST_BYTE_VALID_MSK) >> - RX_LAST_BYTE_VALID_SHFT; + status = readl(uport->membase + SE_GENI_STATUS); + if (status & S_GENI_CMD_ACTIVE) + qcom_geni_serial_stop_rx(uport); - if (!word_cnt) - return; - total_bytes = BYTES_PER_FIFO_WORD * (word_cnt - 1); - if (last_word_partial && last_word_byte_cnt) - total_bytes += last_word_byte_cnt; - else - total_bytes += BYTES_PER_FIFO_WORD; - port->handle_rx(uport, total_bytes, drop); + geni_se_setup_s_cmd(&port->se, UART_START_READ, 0); + + irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN); + irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN; + writel(irq_en, uport->membase + SE_GENI_S_IRQ_EN); + + irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); + irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN; + writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, @@ -1125,11 +1125,6 @@ out_restart_rx: qcom_geni_serial_start_rx(uport); } -static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport) -{ - return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS); -} - #ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE static int qcom_geni_console_setup(struct console *co, char *options) { -- cgit v1.2.3 From 68c6bd92c86cbc4937834c79963b27c77ee3bf51 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:19 +0100 Subject: tty: serial: qcom-geni-serial: remove unused symbols Drop all unused symbols from the driver. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-4-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 15 --------------- 1 file changed, 15 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 31e0faf702a3..359d9f0ba6ee 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -42,20 +42,11 @@ #define UART_TX_PAR_EN BIT(0) #define UART_CTS_MASK BIT(1) -/* SE_UART_TX_WORD_LEN */ -#define TX_WORD_LEN_MSK GENMASK(9, 0) - /* SE_UART_TX_STOP_BIT_LEN */ -#define TX_STOP_BIT_LEN_MSK GENMASK(23, 0) #define TX_STOP_BIT_LEN_1 0 -#define TX_STOP_BIT_LEN_1_5 1 #define TX_STOP_BIT_LEN_2 2 -/* SE_UART_TX_TRANS_LEN */ -#define TX_TRANS_LEN_MSK GENMASK(23, 0) - /* SE_UART_RX_TRANS_CFG */ -#define UART_RX_INS_STATUS_BIT BIT(2) #define UART_RX_PAR_EN BIT(3) /* SE_UART_RX_WORD_LEN */ @@ -66,12 +57,9 @@ /* SE_UART_TX_PARITY_CFG/RX_PARITY_CFG */ #define PAR_CALC_EN BIT(0) -#define PAR_MODE_MSK GENMASK(2, 1) -#define PAR_MODE_SHFT 1 #define PAR_EVEN 0x00 #define PAR_ODD 0x01 #define PAR_SPACE 0x10 -#define PAR_MARK 0x11 /* SE_UART_MANUAL_RFR register fields */ #define UART_MANUAL_RFR_EN BIT(31) @@ -80,11 +68,8 @@ /* UART M_CMD OP codes */ #define UART_START_TX 0x1 -#define UART_START_BREAK 0x4 -#define UART_STOP_BREAK 0x5 /* UART S_CMD OP codes */ #define UART_START_READ 0x1 -#define UART_PARAM 0x1 #define UART_OVERSAMPLING 32 #define STALE_TIMEOUT 16 -- cgit v1.2.3 From 6cde11dbf4b65170eeefba48df730c93d75e01a3 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:20 +0100 Subject: tty: serial: qcom-geni-serial: align #define values Keep the #define symbols aligned for better readability. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-5-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 62 +++++++++++++++++------------------ 1 file changed, 31 insertions(+), 31 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 359d9f0ba6ee..a4a50f2a6554 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -39,57 +39,57 @@ #define SE_UART_MANUAL_RFR 0x2ac /* SE_UART_TRANS_CFG */ -#define UART_TX_PAR_EN BIT(0) -#define UART_CTS_MASK BIT(1) +#define UART_TX_PAR_EN BIT(0) +#define UART_CTS_MASK BIT(1) /* SE_UART_TX_STOP_BIT_LEN */ -#define TX_STOP_BIT_LEN_1 0 -#define TX_STOP_BIT_LEN_2 2 +#define TX_STOP_BIT_LEN_1 0 +#define TX_STOP_BIT_LEN_2 2 /* SE_UART_RX_TRANS_CFG */ -#define UART_RX_PAR_EN BIT(3) +#define UART_RX_PAR_EN BIT(3) /* SE_UART_RX_WORD_LEN */ -#define RX_WORD_LEN_MASK GENMASK(9, 0) +#define RX_WORD_LEN_MASK GENMASK(9, 0) /* SE_UART_RX_STALE_CNT */ -#define RX_STALE_CNT GENMASK(23, 0) +#define RX_STALE_CNT GENMASK(23, 0) /* SE_UART_TX_PARITY_CFG/RX_PARITY_CFG */ -#define PAR_CALC_EN BIT(0) -#define PAR_EVEN 0x00 -#define PAR_ODD 0x01 -#define PAR_SPACE 0x10 +#define PAR_CALC_EN BIT(0) +#define PAR_EVEN 0x00 +#define PAR_ODD 0x01 +#define PAR_SPACE 0x10 /* SE_UART_MANUAL_RFR register fields */ -#define UART_MANUAL_RFR_EN BIT(31) -#define UART_RFR_NOT_READY BIT(1) -#define UART_RFR_READY BIT(0) +#define UART_MANUAL_RFR_EN BIT(31) +#define UART_RFR_NOT_READY BIT(1) +#define UART_RFR_READY BIT(0) /* UART M_CMD OP codes */ -#define UART_START_TX 0x1 +#define UART_START_TX 0x1 /* UART S_CMD OP codes */ -#define UART_START_READ 0x1 - -#define UART_OVERSAMPLING 32 -#define STALE_TIMEOUT 16 -#define DEFAULT_BITS_PER_CHAR 10 -#define GENI_UART_CONS_PORTS 1 -#define GENI_UART_PORTS 3 -#define DEF_FIFO_DEPTH_WORDS 16 -#define DEF_TX_WM 2 -#define DEF_FIFO_WIDTH_BITS 32 -#define UART_RX_WM 2 +#define UART_START_READ 0x1 + +#define UART_OVERSAMPLING 32 +#define STALE_TIMEOUT 16 +#define DEFAULT_BITS_PER_CHAR 10 +#define GENI_UART_CONS_PORTS 1 +#define GENI_UART_PORTS 3 +#define DEF_FIFO_DEPTH_WORDS 16 +#define DEF_TX_WM 2 +#define DEF_FIFO_WIDTH_BITS 32 +#define UART_RX_WM 2 /* SE_UART_LOOPBACK_CFG */ -#define RX_TX_SORTED BIT(0) -#define CTS_RTS_SORTED BIT(1) -#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED) +#define RX_TX_SORTED BIT(0) +#define CTS_RTS_SORTED BIT(1) +#define RX_TX_CTS_RTS_SORTED (RX_TX_SORTED | CTS_RTS_SORTED) /* UART pin swap value */ -#define DEFAULT_IO_MACRO_IO0_IO1_MASK GENMASK(3, 0) +#define DEFAULT_IO_MACRO_IO0_IO1_MASK GENMASK(3, 0) #define IO_MACRO_IO0_SEL 0x3 -#define DEFAULT_IO_MACRO_IO2_IO3_MASK GENMASK(15, 4) +#define DEFAULT_IO_MACRO_IO2_IO3_MASK GENMASK(15, 4) #define IO_MACRO_IO2_IO3_SWAP 0x4640 /* We always configure 4 bytes per FIFO word */ -- cgit v1.2.3 From 00ce7c6e86b5d1f04c4feb9e010b0408c7be1002 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:21 +0100 Subject: tty: serial: qcom-geni-serial: improve the to_dev_port() macro The member we want to resolve in struct qcom_geni_serial_port is called uport so we don't need an additional redundant parameter in this macro. While at it: turn the macro into a static inline function. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-6-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 36 ++++++++++++++++++----------------- 1 file changed, 19 insertions(+), 17 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index a4a50f2a6554..803a46ce4179 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -133,8 +133,10 @@ static const struct uart_ops qcom_geni_uart_pops; static struct uart_driver qcom_geni_console_driver; static struct uart_driver qcom_geni_uart_driver; -#define to_dev_port(ptr, member) \ - container_of(ptr, struct qcom_geni_serial_port, member) +static inline struct qcom_geni_serial_port *to_dev_port(struct uart_port *uport) +{ + return container_of(uport, struct qcom_geni_serial_port, uport); +} static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = { [0] = { @@ -175,7 +177,7 @@ static struct qcom_geni_serial_port qcom_geni_console_port = { static int qcom_geni_serial_request_port(struct uart_port *uport) { struct platform_device *pdev = to_platform_device(uport->dev); - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); uport->membase = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(uport->membase)) @@ -212,7 +214,7 @@ static void qcom_geni_serial_set_mctrl(struct uart_port *uport, unsigned int mctrl) { u32 uart_manual_rfr = 0; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); if (uart_console(uport)) return; @@ -253,7 +255,7 @@ static bool qcom_geni_serial_poll_bit(struct uart_port *uport, struct qcom_geni_private_data *private_data = uport->private_data; if (private_data->drv) { - port = to_dev_port(uport, uport); + port = to_dev_port(uport); baud = port->baud; if (!baud) baud = 115200; @@ -506,7 +508,7 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) u32 i; unsigned char buf[sizeof(u32)]; struct tty_port *tport; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); tport = &uport->state->port; for (i = 0; i < bytes; ) { @@ -549,7 +551,7 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) { struct tty_port *tport; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); u32 num_bytes_pw = port->tx_fifo_width / BITS_PER_BYTE; u32 words = ALIGN(bytes, num_bytes_pw) / num_bytes_pw; int ret; @@ -598,7 +600,7 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport) { u32 irq_en; u32 status; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); irq_en &= ~(M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN); @@ -627,7 +629,7 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) u32 last_word_byte_cnt; u32 last_word_partial; u32 total_bytes; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS); word_cnt = status & RX_FIFO_WC_MSK; @@ -649,7 +651,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport) { u32 irq_en; u32 status; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); u32 s_irq_status; irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN); @@ -687,7 +689,7 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) { u32 irq_en; u32 status; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); status = readl(uport->membase + SE_GENI_STATUS); if (status & S_GENI_CMD_ACTIVE) @@ -707,7 +709,7 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, bool active) { - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); struct circ_buf *xmit = &uport->state->xmit; size_t avail; size_t remaining; @@ -803,7 +805,7 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) struct uart_port *uport = dev; bool drop_rx = false; struct tty_port *tport = &uport->state->port; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); if (uport->suspended) return IRQ_NONE; @@ -871,7 +873,7 @@ static void qcom_geni_serial_shutdown(struct uart_port *uport) static int qcom_geni_serial_port_setup(struct uart_port *uport) { - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); u32 rxstale = DEFAULT_BITS_PER_CHAR * STALE_TIMEOUT; u32 proto; u32 pin_swap; @@ -920,7 +922,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport) static int qcom_geni_serial_startup(struct uart_port *uport) { int ret; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); if (!port->setup) { ret = qcom_geni_serial_port_setup(uport); @@ -1006,7 +1008,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport, u32 stop_bit_len; unsigned int clk_div; u32 ser_clk_cfg; - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); unsigned long clk_rate; u32 ver, sampling_rate; unsigned int avg_bw_core; @@ -1291,7 +1293,7 @@ static struct uart_driver qcom_geni_uart_driver = { static void qcom_geni_serial_pm(struct uart_port *uport, unsigned int new_state, unsigned int old_state) { - struct qcom_geni_serial_port *port = to_dev_port(uport, uport); + struct qcom_geni_serial_port *port = to_dev_port(uport); /* If we've never been called, treat it as off */ if (old_state == UART_PM_STATE_UNDEFINED) -- cgit v1.2.3 From 2f853f83f4bae34887723c7b32db8277bd489ca2 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:22 +0100 Subject: tty: serial: qcom-geni-serial: remove stray newlines Remove stray newlines around #ifdefs for consistency with the rest of the driver code. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-7-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 803a46ce4179..f4e2486b2115 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -320,7 +320,6 @@ static void qcom_geni_serial_abort_rx(struct uart_port *uport) } #ifdef CONFIG_CONSOLE_POLL - static int qcom_geni_serial_get_char(struct uart_port *uport) { struct qcom_geni_private_data *private_data = uport->private_data; @@ -545,7 +544,6 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) { return -EPERM; } - #endif /* CONFIG_SERIAL_QCOM_GENI_CONSOLE */ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) -- cgit v1.2.3 From fe6a00e8fcbecc8af36f8ba3b7bd5c8d28b10f05 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:23 +0100 Subject: tty: serial: qcom-geni-serial: refactor qcom_geni_serial_isr() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Simplify the conditions in qcom_geni_serial_isr() and fix indentation. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221229155030.418800-8-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index f4e2486b2115..92aefd4f8527 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -827,20 +827,18 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) if (m_irq_status & m_irq_en & (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN)) qcom_geni_serial_handle_tx(uport, m_irq_status & M_CMD_DONE_EN, - geni_status & M_GENI_CMD_ACTIVE); + geni_status & M_GENI_CMD_ACTIVE); - if (s_irq_status & S_GP_IRQ_0_EN || s_irq_status & S_GP_IRQ_1_EN) { + if (s_irq_status & (S_GP_IRQ_0_EN | S_GP_IRQ_1_EN)) { if (s_irq_status & S_GP_IRQ_0_EN) uport->icount.parity++; drop_rx = true; - } else if (s_irq_status & S_GP_IRQ_2_EN || - s_irq_status & S_GP_IRQ_3_EN) { + } else if (s_irq_status & (S_GP_IRQ_2_EN | S_GP_IRQ_3_EN)) { uport->icount.brk++; port->brk = true; } - if (s_irq_status & S_RX_FIFO_WATERMARK_EN || - s_irq_status & S_RX_FIFO_LAST_EN) + if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN)) qcom_geni_serial_handle_rx(uport, drop_rx); out_unlock: -- cgit v1.2.3 From 3931b8fdecbfc6ec901e7586e1770d73df636535 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:24 +0100 Subject: tty: serial: qcom-geni-serial: remove unneeded tabs Remove redundant indentation in struct member assignment. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-9-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 92aefd4f8527..e34fe56247d9 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -141,26 +141,26 @@ static inline struct qcom_geni_serial_port *to_dev_port(struct uart_port *uport) static struct qcom_geni_serial_port qcom_geni_uart_ports[GENI_UART_PORTS] = { [0] = { .uport = { - .iotype = UPIO_MEM, - .ops = &qcom_geni_uart_pops, - .flags = UPF_BOOT_AUTOCONF, - .line = 0, + .iotype = UPIO_MEM, + .ops = &qcom_geni_uart_pops, + .flags = UPF_BOOT_AUTOCONF, + .line = 0, }, }, [1] = { .uport = { - .iotype = UPIO_MEM, - .ops = &qcom_geni_uart_pops, - .flags = UPF_BOOT_AUTOCONF, - .line = 1, + .iotype = UPIO_MEM, + .ops = &qcom_geni_uart_pops, + .flags = UPF_BOOT_AUTOCONF, + .line = 1, }, }, [2] = { .uport = { - .iotype = UPIO_MEM, - .ops = &qcom_geni_uart_pops, - .flags = UPF_BOOT_AUTOCONF, - .line = 2, + .iotype = UPIO_MEM, + .ops = &qcom_geni_uart_pops, + .flags = UPF_BOOT_AUTOCONF, + .line = 2, }, }, }; -- cgit v1.2.3 From d420fb491cbcd948e6aa6057616a128d7697ade0 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:25 +0100 Subject: tty: serial: qcom-geni-serial: split out the FIFO tx code qcom_geni_serial_handle_tx() is pretty big, let's move the code that handles the actual writing of data to a separate function which makes sense in preparation for introducing a dma variant of handle_tx(). Signed-off-by: Bartosz Golaszewski Link: https://lore.kernel.org/r/20221229155030.418800-10-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 60 +++++++++++++++++++---------------- 1 file changed, 33 insertions(+), 27 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index e34fe56247d9..bd91a6a5ad37 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -704,19 +704,48 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } +static int qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, + unsigned int chunk) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + struct circ_buf *xmit = &uport->state->xmit; + size_t remaining = chunk; + int i, tail = xmit->tail; + + for (i = 0; i < chunk; ) { + unsigned int tx_bytes; + u8 buf[sizeof(u32)]; + int c; + + memset(buf, 0, sizeof(buf)); + tx_bytes = min_t(size_t, remaining, BYTES_PER_FIFO_WORD); + + for (c = 0; c < tx_bytes ; c++) { + buf[c] = xmit->buf[tail++]; + tail &= UART_XMIT_SIZE - 1; + } + + iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1); + + i += tx_bytes; + uport->icount.tx += tx_bytes; + remaining -= tx_bytes; + port->tx_remaining -= tx_bytes; + } + + return tail; +} + static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, bool active) { struct qcom_geni_serial_port *port = to_dev_port(uport); struct circ_buf *xmit = &uport->state->xmit; size_t avail; - size_t remaining; size_t pending; - int i; u32 status; u32 irq_en; unsigned int chunk; - int tail; status = readl(uport->membase + SE_GENI_TX_FIFO_STATUS); @@ -735,7 +764,6 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, avail = port->tx_fifo_depth - (status & TX_FIFO_WC); avail *= BYTES_PER_FIFO_WORD; - tail = xmit->tail; chunk = min(avail, pending); if (!chunk) goto out_write_wakeup; @@ -750,29 +778,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, uport->membase + SE_GENI_M_IRQ_EN); } - remaining = chunk; - for (i = 0; i < chunk; ) { - unsigned int tx_bytes; - u8 buf[sizeof(u32)]; - int c; - - memset(buf, 0, sizeof(buf)); - tx_bytes = min_t(size_t, remaining, BYTES_PER_FIFO_WORD); - - for (c = 0; c < tx_bytes ; c++) { - buf[c] = xmit->buf[tail++]; - tail &= UART_XMIT_SIZE - 1; - } - - iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1); - - i += tx_bytes; - uport->icount.tx += tx_bytes; - remaining -= tx_bytes; - port->tx_remaining -= tx_bytes; - } - - xmit->tail = tail; + xmit->tail = qcom_geni_serial_send_chunk_fifo(uport, chunk); /* * The tx fifo watermark is level triggered and latched. Though we had -- cgit v1.2.3 From bd7955840cbefd0efffd0e2e9c14b2e6f77eb94c Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:26 +0100 Subject: tty: serial: qcom-geni-serial: refactor qcom_geni_serial_send_chunk_fifo() Shuffle the code a bit, drop unneeded variables, make types of others more consistent and use uart_xmit_advance() instead of handling tail->xmit manually. Signed-off-by: Bartosz Golaszewski Link: https://lore.kernel.org/r/20221229155030.418800-11-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 28 ++++++++++------------------ 1 file changed, 10 insertions(+), 18 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index bd91a6a5ad37..3705c0f893a4 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -93,7 +93,7 @@ #define IO_MACRO_IO2_IO3_SWAP 0x4640 /* We always configure 4 bytes per FIFO word */ -#define BYTES_PER_FIFO_WORD 4 +#define BYTES_PER_FIFO_WORD 4U struct qcom_geni_private_data { /* NOTE: earlycon port will have NULL here */ @@ -704,36 +704,28 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } -static int qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, - unsigned int chunk) +static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, + unsigned int chunk) { struct qcom_geni_serial_port *port = to_dev_port(uport); struct circ_buf *xmit = &uport->state->xmit; - size_t remaining = chunk; - int i, tail = xmit->tail; - - for (i = 0; i < chunk; ) { - unsigned int tx_bytes; - u8 buf[sizeof(u32)]; - int c; + unsigned int tx_bytes, c, remaining = chunk; + u8 buf[BYTES_PER_FIFO_WORD]; + while (remaining) { memset(buf, 0, sizeof(buf)); - tx_bytes = min_t(size_t, remaining, BYTES_PER_FIFO_WORD); + tx_bytes = min(remaining, BYTES_PER_FIFO_WORD); for (c = 0; c < tx_bytes ; c++) { - buf[c] = xmit->buf[tail++]; - tail &= UART_XMIT_SIZE - 1; + buf[c] = xmit->buf[xmit->tail]; + uart_xmit_advance(uport, 1); } iowrite32_rep(uport->membase + SE_GENI_TX_FIFOn, buf, 1); - i += tx_bytes; - uport->icount.tx += tx_bytes; remaining -= tx_bytes; port->tx_remaining -= tx_bytes; } - - return tail; } static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, @@ -778,7 +770,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, uport->membase + SE_GENI_M_IRQ_EN); } - xmit->tail = qcom_geni_serial_send_chunk_fifo(uport, chunk); + qcom_geni_serial_send_chunk_fifo(uport, chunk); /* * The tx fifo watermark is level triggered and latched. Though we had -- cgit v1.2.3 From 0626afe57b1f02a961e18802ea445dc562bdf77b Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:27 +0100 Subject: tty: serial: qcom-geni-serial: drop the return value from handle_rx The return value of the handle_rx() callback is never checked. Drop it. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-12-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 14 ++++++-------- 1 file changed, 6 insertions(+), 8 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 3705c0f893a4..6daa3e205fc9 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -114,7 +114,7 @@ struct qcom_geni_serial_port { u32 tx_fifo_width; u32 rx_fifo_depth; bool setup; - int (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); + void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); unsigned int baud; void *rx_fifo; u32 loopback; @@ -502,7 +502,7 @@ static void qcom_geni_serial_console_write(struct console *co, const char *s, spin_unlock_irqrestore(&uport->lock, flags); } -static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) +static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) { u32 i; unsigned char buf[sizeof(u32)]; @@ -537,16 +537,15 @@ static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) } if (!drop) tty_flip_buffer_push(tport); - return 0; } #else -static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) +static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) { - return -EPERM; + } #endif /* CONFIG_SERIAL_QCOM_GENI_CONSOLE */ -static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) +static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) { struct tty_port *tport; struct qcom_geni_serial_port *port = to_dev_port(uport); @@ -557,7 +556,7 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) tport = &uport->state->port; ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words); if (drop) - return 0; + return; ret = tty_insert_flip_string(tport, port->rx_fifo, bytes); if (ret != bytes) { @@ -567,7 +566,6 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) } uport->icount.rx += ret; tty_flip_buffer_push(tport); - return ret; } static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport) -- cgit v1.2.3 From 40ec6d41c841e27a1e12ac7766a5361e3ff0cb5b Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:28 +0100 Subject: tty: serial: qcom-geni-serial: use of_device_id data Instead of checking the device compatible in probe(), assign the device-specific data to struct of_device_id. We'll use it later when providing SE DMA support. Signed-off-by: Bartosz Golaszewski Reviewed-by: Konrad Dybcio Link: https://lore.kernel.org/r/20221229155030.418800-13-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 46 ++++++++++++++++++++++++++--------- 1 file changed, 34 insertions(+), 12 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 6daa3e205fc9..0b3786040bfb 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -95,6 +95,11 @@ /* We always configure 4 bytes per FIFO word */ #define BYTES_PER_FIFO_WORD 4U +struct qcom_geni_device_data { + bool console; + void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); +}; + struct qcom_geni_private_data { /* NOTE: earlycon port will have NULL here */ struct uart_driver *drv; @@ -114,7 +119,6 @@ struct qcom_geni_serial_port { u32 tx_fifo_width; u32 rx_fifo_depth; bool setup; - void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); unsigned int baud; void *rx_fifo; u32 loopback; @@ -126,6 +130,7 @@ struct qcom_geni_serial_port { bool cts_rts_swap; struct qcom_geni_private_data private_data; + const struct qcom_geni_device_data *dev_data; }; static const struct uart_ops qcom_geni_console_pops; @@ -640,7 +645,7 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) total_bytes += last_word_byte_cnt; else total_bytes += BYTES_PER_FIFO_WORD; - port->handle_rx(uport, total_bytes, drop); + port->dev_data->handle_rx(uport, total_bytes, drop); } static void qcom_geni_serial_stop_rx(struct uart_port *uport) @@ -1346,13 +1351,14 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) struct uart_port *uport; struct resource *res; int irq; - bool console = false; struct uart_driver *drv; + const struct qcom_geni_device_data *data; - if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart")) - console = true; + data = of_device_get_match_data(&pdev->dev); + if (!data) + return -EINVAL; - if (console) { + if (data->console) { drv = &qcom_geni_console_driver; line = of_alias_get_id(pdev->dev.of_node, "serial"); } else { @@ -1362,7 +1368,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) line = of_alias_get_id(pdev->dev.of_node, "hsuart"); } - port = get_port_from_line(line, console); + port = get_port_from_line(line, data->console); if (IS_ERR(port)) { dev_err(&pdev->dev, "Invalid line %d\n", line); return PTR_ERR(port); @@ -1374,6 +1380,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) return -ENODEV; uport->dev = &pdev->dev; + port->dev_data = data; port->se.dev = &pdev->dev; port->se.wrapper = dev_get_drvdata(pdev->dev.parent); port->se.clk = devm_clk_get(&pdev->dev, "se"); @@ -1392,7 +1399,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS; port->tx_fifo_width = DEF_FIFO_WIDTH_BITS; - if (!console) { + if (!data->console) { port->rx_fifo = devm_kcalloc(uport->dev, port->rx_fifo_depth, sizeof(u32), GFP_KERNEL); if (!port->rx_fifo) @@ -1422,7 +1429,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) uport->irq = irq; uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE); - if (!console) + if (!data->console) port->wakeup_irq = platform_get_irq_optional(pdev, 1); if (of_property_read_bool(pdev->dev.of_node, "rx-tx-swap")) @@ -1444,7 +1451,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) port->private_data.drv = drv; uport->private_data = &port->private_data; platform_set_drvdata(pdev, port); - port->handle_rx = console ? handle_rx_console : handle_rx_uart; ret = uart_add_one_port(drv, uport); if (ret) @@ -1556,6 +1562,16 @@ static int qcom_geni_serial_sys_hib_resume(struct device *dev) return ret; } +static const struct qcom_geni_device_data qcom_geni_console_data = { + .console = true, + .handle_rx = handle_rx_console, +}; + +static const struct qcom_geni_device_data qcom_geni_uart_data = { + .console = false, + .handle_rx = handle_rx_uart, +}; + static const struct dev_pm_ops qcom_geni_serial_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend, qcom_geni_serial_sys_resume) @@ -1564,8 +1580,14 @@ static const struct dev_pm_ops qcom_geni_serial_pm_ops = { }; static const struct of_device_id qcom_geni_serial_match_table[] = { - { .compatible = "qcom,geni-debug-uart", }, - { .compatible = "qcom,geni-uart", }, + { + .compatible = "qcom,geni-debug-uart", + .data = &qcom_geni_console_data, + }, + { + .compatible = "qcom,geni-uart", + .data = &qcom_geni_uart_data, + }, {} }; MODULE_DEVICE_TABLE(of, qcom_geni_serial_match_table); -- cgit v1.2.3 From 2aaa43c7077833301c237684cd7bc9ae5e3dec95 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Thu, 29 Dec 2022 16:50:30 +0100 Subject: tty: serial: qcom-geni-serial: add support for serial engine DMA The qcom-geni-serial driver currently only works in SE FIFO mode. This limits the UART speed to around 180 kB/s. In order to achieve higher speeds we need to use SE DMA mode. Keep the console port working in FIFO mode but extend the code to use DMA for the high-speed port. Signed-off-by: Bartosz Golaszewski Link: https://lore.kernel.org/r/20221229155030.418800-15-brgl@bgdev.pl Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 314 +++++++++++++++++++++++++++------- 1 file changed, 255 insertions(+), 59 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 0b3786040bfb..c1aea9d1dc16 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -70,6 +70,8 @@ #define UART_START_TX 0x1 /* UART S_CMD OP codes */ #define UART_START_READ 0x1 +#define UART_PARAM 0x1 +#define UART_PARAM_RFR_OPEN BIT(7) #define UART_OVERSAMPLING 32 #define STALE_TIMEOUT 16 @@ -95,9 +97,11 @@ /* We always configure 4 bytes per FIFO word */ #define BYTES_PER_FIFO_WORD 4U +#define DMA_RX_BUF_SIZE 2048 + struct qcom_geni_device_data { bool console; - void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop); + enum geni_se_xfer_mode mode; }; struct qcom_geni_private_data { @@ -118,9 +122,11 @@ struct qcom_geni_serial_port { u32 tx_fifo_depth; u32 tx_fifo_width; u32 rx_fifo_depth; + dma_addr_t tx_dma_addr; + dma_addr_t rx_dma_addr; bool setup; unsigned int baud; - void *rx_fifo; + void *rx_buf; u32 loopback; bool brk; @@ -249,6 +255,16 @@ static struct qcom_geni_serial_port *get_port_from_line(int line, bool console) return port; } +static bool qcom_geni_serial_main_active(struct uart_port *uport) +{ + return readl(uport->membase + SE_GENI_STATUS) & M_GENI_CMD_ACTIVE; +} + +static bool qcom_geni_serial_secondary_active(struct uart_port *uport) +{ + return readl(uport->membase + SE_GENI_STATUS) & S_GENI_CMD_ACTIVE; +} + static bool qcom_geni_serial_poll_bit(struct uart_port *uport, int offset, int field, bool set) { @@ -552,18 +568,11 @@ static void handle_rx_console(struct uart_port *uport, u32 bytes, bool drop) static void handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop) { - struct tty_port *tport; struct qcom_geni_serial_port *port = to_dev_port(uport); - u32 num_bytes_pw = port->tx_fifo_width / BITS_PER_BYTE; - u32 words = ALIGN(bytes, num_bytes_pw) / num_bytes_pw; + struct tty_port *tport = &uport->state->port; int ret; - tport = &uport->state->port; - ioread32_rep(uport->membase + SE_GENI_RX_FIFOn, port->rx_fifo, words); - if (drop) - return; - - ret = tty_insert_flip_string(tport, port->rx_fifo, bytes); + ret = tty_insert_flip_string(tport, port->rx_buf, bytes); if (ret != bytes) { dev_err(uport->dev, "%s:Unable to push data ret %d_bytes %d\n", __func__, ret, bytes); @@ -578,16 +587,75 @@ static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport) return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS); } -static void qcom_geni_serial_start_tx(struct uart_port *uport) +static void qcom_geni_serial_stop_tx_dma(struct uart_port *uport) { - u32 irq_en; - u32 status; + struct qcom_geni_serial_port *port = to_dev_port(uport); + bool done; + u32 m_irq_en; + + if (!qcom_geni_serial_main_active(uport)) + return; + + if (port->rx_dma_addr) { + geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr, + port->tx_remaining); + port->tx_dma_addr = 0; + port->tx_remaining = 0; + } + + m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); + writel(m_irq_en, uport->membase + SE_GENI_M_IRQ_EN); + geni_se_cancel_m_cmd(&port->se); + + done = qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS, + S_CMD_CANCEL_EN, true); + if (!done) { + geni_se_abort_m_cmd(&port->se); + done = qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS, + M_CMD_ABORT_EN, true); + if (!done) + dev_err_ratelimited(uport->dev, "M_CMD_ABORT_EN not set"); + writel(M_CMD_ABORT_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); + } + + writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); +} + +static void qcom_geni_serial_start_tx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + struct circ_buf *xmit = &uport->state->xmit; + unsigned int xmit_size; + int ret; + + if (port->tx_dma_addr) + return; + + xmit_size = uart_circ_chars_pending(xmit); + if (xmit_size < WAKEUP_CHARS) + uart_write_wakeup(uport); - status = readl(uport->membase + SE_GENI_STATUS); - if (status & M_GENI_CMD_ACTIVE) + xmit_size = CIRC_CNT_TO_END(xmit->head, xmit->tail, UART_XMIT_SIZE); + + qcom_geni_serial_setup_tx(uport, xmit_size); + + ret = geni_se_tx_dma_prep(&port->se, &xmit->buf[xmit->tail], + xmit_size, &port->tx_dma_addr); + if (ret) { + dev_err(uport->dev, "unable to start TX SE DMA: %d\n", ret); + qcom_geni_serial_stop_tx_dma(uport); return; + } + + port->tx_remaining = xmit_size; +} + +static void qcom_geni_serial_start_tx_fifo(struct uart_port *uport) +{ + u32 irq_en; - if (!qcom_geni_serial_tx_empty(uport)) + if (qcom_geni_serial_main_active(uport) || + !qcom_geni_serial_tx_empty(uport)) return; irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); @@ -597,19 +665,17 @@ static void qcom_geni_serial_start_tx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } -static void qcom_geni_serial_stop_tx(struct uart_port *uport) +static void qcom_geni_serial_stop_tx_fifo(struct uart_port *uport) { u32 irq_en; - u32 status; struct qcom_geni_serial_port *port = to_dev_port(uport); irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); irq_en &= ~(M_CMD_DONE_EN | M_TX_FIFO_WATERMARK_EN); writel(0, uport->membase + SE_GENI_TX_WATERMARK_REG); writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); - status = readl(uport->membase + SE_GENI_STATUS); /* Possible stop tx is called multiple times. */ - if (!(status & M_GENI_CMD_ACTIVE)) + if (!qcom_geni_serial_main_active(uport)) return; geni_se_cancel_m_cmd(&port->se); @@ -623,14 +689,13 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport) writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR); } -static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) +static void qcom_geni_serial_handle_rx_fifo(struct uart_port *uport, bool drop) { u32 status; u32 word_cnt; u32 last_word_byte_cnt; u32 last_word_partial; u32 total_bytes; - struct qcom_geni_serial_port *port = to_dev_port(uport); status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS); word_cnt = status & RX_FIFO_WC_MSK; @@ -645,13 +710,12 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop) total_bytes += last_word_byte_cnt; else total_bytes += BYTES_PER_FIFO_WORD; - port->dev_data->handle_rx(uport, total_bytes, drop); + handle_rx_console(uport, total_bytes, drop); } -static void qcom_geni_serial_stop_rx(struct uart_port *uport) +static void qcom_geni_serial_stop_rx_fifo(struct uart_port *uport) { u32 irq_en; - u32 status; struct qcom_geni_serial_port *port = to_dev_port(uport); u32 s_irq_status; @@ -663,9 +727,7 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport) irq_en &= ~(M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN); writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); - status = readl(uport->membase + SE_GENI_STATUS); - /* Possible stop rx is called multiple times. */ - if (!(status & S_GENI_CMD_ACTIVE)) + if (!qcom_geni_serial_secondary_active(uport)) return; geni_se_cancel_s_cmd(&port->se); @@ -678,23 +740,20 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport) s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS); /* Flush the Rx buffer */ if (s_irq_status & S_RX_FIFO_LAST_EN) - qcom_geni_serial_handle_rx(uport, true); + qcom_geni_serial_handle_rx_fifo(uport, true); writel(s_irq_status, uport->membase + SE_GENI_S_IRQ_CLEAR); - status = readl(uport->membase + SE_GENI_STATUS); - if (status & S_GENI_CMD_ACTIVE) + if (qcom_geni_serial_secondary_active(uport)) qcom_geni_serial_abort_rx(uport); } -static void qcom_geni_serial_start_rx(struct uart_port *uport) +static void qcom_geni_serial_start_rx_fifo(struct uart_port *uport) { u32 irq_en; - u32 status; struct qcom_geni_serial_port *port = to_dev_port(uport); - status = readl(uport->membase + SE_GENI_STATUS); - if (status & S_GENI_CMD_ACTIVE) - qcom_geni_serial_stop_rx(uport); + if (qcom_geni_serial_secondary_active(uport)) + qcom_geni_serial_stop_rx_fifo(uport); geni_se_setup_s_cmd(&port->se, UART_START_READ, 0); @@ -707,6 +766,94 @@ static void qcom_geni_serial_start_rx(struct uart_port *uport) writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN); } +static void qcom_geni_serial_stop_rx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + + if (!qcom_geni_serial_secondary_active(uport)) + return; + + geni_se_cancel_s_cmd(&port->se); + qcom_geni_serial_poll_bit(uport, SE_GENI_S_IRQ_STATUS, + S_CMD_CANCEL_EN, true); + + if (qcom_geni_serial_secondary_active(uport)) + qcom_geni_serial_abort_rx(uport); + + if (port->rx_dma_addr) { + geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr, + DMA_RX_BUF_SIZE); + port->rx_dma_addr = 0; + } +} + +static void qcom_geni_serial_start_rx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + int ret; + + if (qcom_geni_serial_secondary_active(uport)) + qcom_geni_serial_stop_rx_dma(uport); + + geni_se_setup_s_cmd(&port->se, UART_START_READ, UART_PARAM_RFR_OPEN); + + ret = geni_se_rx_dma_prep(&port->se, port->rx_buf, + DMA_RX_BUF_SIZE, + &port->rx_dma_addr); + if (ret) { + dev_err(uport->dev, "unable to start RX SE DMA: %d\n", ret); + qcom_geni_serial_stop_rx_dma(uport); + } +} + +static void qcom_geni_serial_handle_rx_dma(struct uart_port *uport, bool drop) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + u32 rx_in; + int ret; + + if (!qcom_geni_serial_secondary_active(uport)) + return; + + if (!port->rx_dma_addr) + return; + + geni_se_rx_dma_unprep(&port->se, port->rx_dma_addr, DMA_RX_BUF_SIZE); + port->rx_dma_addr = 0; + + rx_in = readl(uport->membase + SE_DMA_RX_LEN_IN); + if (!rx_in) { + dev_warn(uport->dev, "serial engine reports 0 RX bytes in!\n"); + return; + } + + if (!drop) + handle_rx_uart(uport, rx_in, drop); + + ret = geni_se_rx_dma_prep(&port->se, port->rx_buf, + DMA_RX_BUF_SIZE, + &port->rx_dma_addr); + if (ret) { + dev_err(uport->dev, "unable to start RX SE DMA: %d\n", ret); + qcom_geni_serial_stop_rx_dma(uport); + } +} + +static void qcom_geni_serial_start_rx(struct uart_port *uport) +{ + uport->ops->start_rx(uport); +} + +static void qcom_geni_serial_stop_rx(struct uart_port *uport) +{ + uport->ops->stop_rx(uport); +} + +static void qcom_geni_serial_stop_tx(struct uart_port *uport) +{ + uport->ops->stop_tx(uport); +} + static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, unsigned int chunk) { @@ -731,8 +878,8 @@ static void qcom_geni_serial_send_chunk_fifo(struct uart_port *uport, } } -static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, - bool active) +static void qcom_geni_serial_handle_tx_fifo(struct uart_port *uport, + bool done, bool active) { struct qcom_geni_serial_port *port = to_dev_port(uport); struct circ_buf *xmit = &uport->state->xmit; @@ -752,7 +899,7 @@ static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done, /* All data has been transmitted and acknowledged as received */ if (!pending && !status && done) { - qcom_geni_serial_stop_tx(uport); + qcom_geni_serial_stop_tx_fifo(uport); goto out_write_wakeup; } @@ -795,12 +942,32 @@ out_write_wakeup: uart_write_wakeup(uport); } +static void qcom_geni_serial_handle_tx_dma(struct uart_port *uport) +{ + struct qcom_geni_serial_port *port = to_dev_port(uport); + struct circ_buf *xmit = &uport->state->xmit; + + uart_xmit_advance(uport, port->tx_remaining); + geni_se_tx_dma_unprep(&port->se, port->tx_dma_addr, port->tx_remaining); + port->tx_dma_addr = 0; + port->tx_remaining = 0; + + if (!uart_circ_empty(xmit)) + qcom_geni_serial_start_tx_dma(uport); + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(uport); +} + static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) { u32 m_irq_en; u32 m_irq_status; u32 s_irq_status; u32 geni_status; + u32 dma; + u32 dma_tx_status; + u32 dma_rx_status; struct uart_port *uport = dev; bool drop_rx = false; struct tty_port *tport = &uport->state->port; @@ -813,10 +980,15 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) m_irq_status = readl(uport->membase + SE_GENI_M_IRQ_STATUS); s_irq_status = readl(uport->membase + SE_GENI_S_IRQ_STATUS); + dma_tx_status = readl(uport->membase + SE_DMA_TX_IRQ_STAT); + dma_rx_status = readl(uport->membase + SE_DMA_RX_IRQ_STAT); geni_status = readl(uport->membase + SE_GENI_STATUS); + dma = readl(uport->membase + SE_GENI_DMA_MODE_EN); m_irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN); writel(m_irq_status, uport->membase + SE_GENI_M_IRQ_CLEAR); writel(s_irq_status, uport->membase + SE_GENI_S_IRQ_CLEAR); + writel(dma_tx_status, uport->membase + SE_DMA_TX_IRQ_CLR); + writel(dma_rx_status, uport->membase + SE_DMA_RX_IRQ_CLR); if (WARN_ON(m_irq_status & M_ILLEGAL_CMD_EN)) goto out_unlock; @@ -826,10 +998,6 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) tty_insert_flip_char(tport, 0, TTY_OVERRUN); } - if (m_irq_status & m_irq_en & (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN)) - qcom_geni_serial_handle_tx(uport, m_irq_status & M_CMD_DONE_EN, - geni_status & M_GENI_CMD_ACTIVE); - if (s_irq_status & (S_GP_IRQ_0_EN | S_GP_IRQ_1_EN)) { if (s_irq_status & S_GP_IRQ_0_EN) uport->icount.parity++; @@ -839,8 +1007,35 @@ static irqreturn_t qcom_geni_serial_isr(int isr, void *dev) port->brk = true; } - if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN)) - qcom_geni_serial_handle_rx(uport, drop_rx); + if (dma) { + if (dma_tx_status & TX_DMA_DONE) + qcom_geni_serial_handle_tx_dma(uport); + + if (dma_rx_status) { + if (dma_rx_status & RX_RESET_DONE) + goto out_unlock; + + if (dma_rx_status & RX_DMA_PARITY_ERR) { + uport->icount.parity++; + drop_rx = true; + } + + if (dma_rx_status & RX_DMA_BREAK) + uport->icount.brk++; + + if (dma_rx_status & (RX_DMA_DONE | RX_EOT)) + qcom_geni_serial_handle_rx_dma(uport, drop_rx); + } + } else { + if (m_irq_status & m_irq_en & + (M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN)) + qcom_geni_serial_handle_tx_fifo(uport, + m_irq_status & M_CMD_DONE_EN, + geni_status & M_GENI_CMD_ACTIVE); + + if (s_irq_status & (S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN)) + qcom_geni_serial_handle_rx_fifo(uport, drop_rx); + } out_unlock: uart_unlock_and_check_sysrq(uport); @@ -909,7 +1104,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport) geni_se_config_packing(&port->se, BITS_PER_BYTE, BYTES_PER_FIFO_WORD, false, true, true); geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2); - geni_se_select_mode(&port->se, GENI_SE_FIFO); + geni_se_select_mode(&port->se, port->dev_data->mode); qcom_geni_serial_start_rx(uport); port->setup = true; @@ -1308,10 +1503,10 @@ static void qcom_geni_serial_pm(struct uart_port *uport, static const struct uart_ops qcom_geni_console_pops = { .tx_empty = qcom_geni_serial_tx_empty, - .stop_tx = qcom_geni_serial_stop_tx, - .start_tx = qcom_geni_serial_start_tx, - .stop_rx = qcom_geni_serial_stop_rx, - .start_rx = qcom_geni_serial_start_rx, + .stop_tx = qcom_geni_serial_stop_tx_fifo, + .start_tx = qcom_geni_serial_start_tx_fifo, + .stop_rx = qcom_geni_serial_stop_rx_fifo, + .start_rx = qcom_geni_serial_start_rx_fifo, .set_termios = qcom_geni_serial_set_termios, .startup = qcom_geni_serial_startup, .request_port = qcom_geni_serial_request_port, @@ -1329,9 +1524,10 @@ static const struct uart_ops qcom_geni_console_pops = { static const struct uart_ops qcom_geni_uart_pops = { .tx_empty = qcom_geni_serial_tx_empty, - .stop_tx = qcom_geni_serial_stop_tx, - .start_tx = qcom_geni_serial_start_tx, - .stop_rx = qcom_geni_serial_stop_rx, + .stop_tx = qcom_geni_serial_stop_tx_dma, + .start_tx = qcom_geni_serial_start_tx_dma, + .start_rx = qcom_geni_serial_start_rx_dma, + .stop_rx = qcom_geni_serial_stop_rx_dma, .set_termios = qcom_geni_serial_set_termios, .startup = qcom_geni_serial_startup, .request_port = qcom_geni_serial_request_port, @@ -1400,9 +1596,9 @@ static int qcom_geni_serial_probe(struct platform_device *pdev) port->tx_fifo_width = DEF_FIFO_WIDTH_BITS; if (!data->console) { - port->rx_fifo = devm_kcalloc(uport->dev, - port->rx_fifo_depth, sizeof(u32), GFP_KERNEL); - if (!port->rx_fifo) + port->rx_buf = devm_kzalloc(uport->dev, + DMA_RX_BUF_SIZE, GFP_KERNEL); + if (!port->rx_buf) return -ENOMEM; } @@ -1564,12 +1760,12 @@ static int qcom_geni_serial_sys_hib_resume(struct device *dev) static const struct qcom_geni_device_data qcom_geni_console_data = { .console = true, - .handle_rx = handle_rx_console, + .mode = GENI_SE_FIFO, }; static const struct qcom_geni_device_data qcom_geni_uart_data = { .console = false, - .handle_rx = handle_rx_uart, + .mode = GENI_SE_DMA, }; static const struct dev_pm_ops qcom_geni_serial_pm_ops = { -- cgit v1.2.3 From 6e054678ff5c10840ce801dfdb2d4898decb2b63 Mon Sep 17 00:00:00 2001 From: Liang He Date: Mon, 5 Dec 2022 16:54:37 +0800 Subject: serial: ucc_uart: Add of_node_put() in ucc_uart_remove() In ucc_uart_probe(), we have added proper of_node_put() in the failure paths. However, we miss it before we free *qe_port* in the remove() function. Signed-off-by: Liang He Link: https://lore.kernel.org/r/20221205085437.1163682-1-windhl@126.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/ucc_uart.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/ucc_uart.c b/drivers/tty/serial/ucc_uart.c index b09b6496ee3e..32c7a5b43f8e 100644 --- a/drivers/tty/serial/ucc_uart.c +++ b/drivers/tty/serial/ucc_uart.c @@ -1468,6 +1468,8 @@ static int ucc_uart_remove(struct platform_device *ofdev) uart_remove_one_port(&ucc_uart_driver, &qe_port->port); + of_node_put(qe_port->np); + kfree(qe_port); return 0; -- cgit v1.2.3 From 03e30f06e5286bc91ba4785d33c1d3fa03e8a442 Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Fri, 30 Dec 2022 17:59:56 +0100 Subject: serial: sccnxp: Use devm_clk_get_enabled() helper The devm_clk_get_enabled() helper: - calls devm_clk_get() - calls clk_prepare_enable() and registers what is needed in order to call clk_disable_unprepare() when needed, as a managed resource. This simplifies the code. This also avoids some other warnings/issues. (see [1]) [1]: https://lore.kernel.org/all/20221118233101.never.215-kees@kernel.org/ Signed-off-by: Christophe JAILLET Link: https://lore.kernel.org/r/735a807c2df835aa436dcbc76b374f983f89a9af.1672419577.git.christophe.jaillet@wanadoo.fr Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sccnxp.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index 7df687822634..4f2fc5f7bb19 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -913,23 +913,13 @@ static int sccnxp_probe(struct platform_device *pdev) } else if (PTR_ERR(s->regulator) == -EPROBE_DEFER) return -EPROBE_DEFER; - clk = devm_clk_get(&pdev->dev, NULL); + clk = devm_clk_get_enabled(&pdev->dev, NULL); if (IS_ERR(clk)) { ret = PTR_ERR(clk); if (ret == -EPROBE_DEFER) goto err_out; uartclk = 0; } else { - ret = clk_prepare_enable(clk); - if (ret) - goto err_out; - - ret = devm_add_action_or_reset(&pdev->dev, - (void(*)(void *))clk_disable_unprepare, - clk); - if (ret) - goto err_out; - uartclk = clk_get_rate(clk); } -- cgit v1.2.3 From 7aa34bb3ae9efa11ae3df2c90990715278d52971 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Mon, 9 Jan 2023 16:22:12 +0100 Subject: serial: msm: add lock annotation to msm_set_baud_rate() msm_set_baud_rate() releases and re-acquires the port->lock, thus add lock annotation for Sparse static code checks. Signed-off-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20230109152212.343476-1-krzysztof.kozlowski@linaro.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/msm_serial.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index 843798e63084..90953e679e38 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -1120,6 +1120,7 @@ msm_find_best_baud(struct uart_port *port, unsigned int baud, static int msm_set_baud_rate(struct uart_port *port, unsigned int baud, unsigned long *saved_flags) + __must_hold(&port->lock) { unsigned int rxstale, watermark, mask; struct msm_port *msm_port = to_msm_port(port); -- cgit v1.2.3 From c8f71b49ee4d28930c4a6798d1969fa91dc4ef3e Mon Sep 17 00:00:00 2001 From: Isaac True Date: Wed, 30 Nov 2022 11:55:30 +0100 Subject: serial: sc16is7xx: setup GPIO controller later in probe The GPIO controller component of the sc16is7xx driver is setup too early, which can result in a race condition where another device tries to utilise the GPIO lines before the sc16is7xx device has finished initialising. This issue manifests itself as an Oops when the GPIO lines are configured: Unable to handle kernel read from unreadable memory at virtual address ... pc : sc16is7xx_gpio_direction_output+0x68/0x108 [sc16is7xx] lr : sc16is7xx_gpio_direction_output+0x4c/0x108 [sc16is7xx] ... Call trace: sc16is7xx_gpio_direction_output+0x68/0x108 [sc16is7xx] gpiod_direction_output_raw_commit+0x64/0x318 gpiod_direction_output+0xb0/0x170 create_gpio_led+0xec/0x198 gpio_led_probe+0x16c/0x4f0 platform_drv_probe+0x5c/0xb0 really_probe+0xe8/0x448 driver_probe_device+0xe8/0x138 __device_attach_driver+0x94/0x118 bus_for_each_drv+0x8c/0xe0 __device_attach+0x100/0x1b8 device_initial_probe+0x28/0x38 bus_probe_device+0xa4/0xb0 deferred_probe_work_func+0x90/0xe0 process_one_work+0x1c4/0x480 worker_thread+0x54/0x430 kthread+0x138/0x150 ret_from_fork+0x10/0x1c This patch moves the setup of the GPIO controller functions to later in the probe function, ensuring the sc16is7xx device has already finished initialising by the time other devices try to make use of the GPIO lines. The error handling has also been reordered to reflect the new initialisation order. Co-developed-by: Wen-chien Jesse Sung Signed-off-by: Wen-chien Jesse Sung Signed-off-by: Isaac True Link: https://lore.kernel.org/r/20221130105529.698385-1-isaac.true@canonical.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sc16is7xx.c | 51 +++++++++++++++++++++--------------------- 1 file changed, 26 insertions(+), 25 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c index 39f92eb1e698..29c94be09159 100644 --- a/drivers/tty/serial/sc16is7xx.c +++ b/drivers/tty/serial/sc16is7xx.c @@ -1423,25 +1423,6 @@ static int sc16is7xx_probe(struct device *dev, } sched_set_fifo(s->kworker_task); -#ifdef CONFIG_GPIOLIB - if (devtype->nr_gpio) { - /* Setup GPIO cotroller */ - s->gpio.owner = THIS_MODULE; - s->gpio.parent = dev; - s->gpio.label = dev_name(dev); - s->gpio.direction_input = sc16is7xx_gpio_direction_input; - s->gpio.get = sc16is7xx_gpio_get; - s->gpio.direction_output = sc16is7xx_gpio_direction_output; - s->gpio.set = sc16is7xx_gpio_set; - s->gpio.base = -1; - s->gpio.ngpio = devtype->nr_gpio; - s->gpio.can_sleep = 1; - ret = gpiochip_add_data(&s->gpio, s); - if (ret) - goto out_thread; - } -#endif - /* reset device, purging any pending irq / data */ regmap_write(s->regmap, SC16IS7XX_IOCONTROL_REG << SC16IS7XX_REG_SHIFT, SC16IS7XX_IOCONTROL_SRESET_BIT); @@ -1518,6 +1499,25 @@ static int sc16is7xx_probe(struct device *dev, s->p[u].irda_mode = true; } +#ifdef CONFIG_GPIOLIB + if (devtype->nr_gpio) { + /* Setup GPIO cotroller */ + s->gpio.owner = THIS_MODULE; + s->gpio.parent = dev; + s->gpio.label = dev_name(dev); + s->gpio.direction_input = sc16is7xx_gpio_direction_input; + s->gpio.get = sc16is7xx_gpio_get; + s->gpio.direction_output = sc16is7xx_gpio_direction_output; + s->gpio.set = sc16is7xx_gpio_set; + s->gpio.base = -1; + s->gpio.ngpio = devtype->nr_gpio; + s->gpio.can_sleep = 1; + ret = gpiochip_add_data(&s->gpio, s); + if (ret) + goto out_thread; + } +#endif + /* * Setup interrupt. We first try to acquire the IRQ line as level IRQ. * If that succeeds, we can allow sharing the interrupt as well. @@ -1537,18 +1537,19 @@ static int sc16is7xx_probe(struct device *dev, if (!ret) return 0; -out_ports: - for (i--; i >= 0; i--) { - uart_remove_one_port(&sc16is7xx_uart, &s->p[i].port); - clear_bit(s->p[i].port.line, &sc16is7xx_lines); - } - #ifdef CONFIG_GPIOLIB if (devtype->nr_gpio) gpiochip_remove(&s->gpio); out_thread: #endif + +out_ports: + for (i--; i >= 0; i--) { + uart_remove_one_port(&sc16is7xx_uart, &s->p[i].port); + clear_bit(s->p[i].port.line, &sc16is7xx_lines); + } + kthread_stop(s->kworker_task); out_clk: -- cgit v1.2.3 From 38f28cfe9d08e3a47ef008798b275fef8118fc20 Mon Sep 17 00:00:00 2001 From: Yi Yang Date: Sat, 26 Nov 2022 10:08:52 +0800 Subject: serial: tegra: Add missing clk_disable_unprepare() in tegra_uart_hw_init() Add the missing clk_disable_unprepare() before return from tegra_uart_hw_init() in the error handling path. When request_irq() fails in tegra_uart_startup(), 'tup->uart_clk' has been enabled, fix it by adding clk_disable_unprepare(). Fixes: cc9ca4d95846 ("serial: tegra: Only print FIFO error message when an error occurs") Fixes: d781ec21bae6 ("serial: tegra: report clk rate errors") Signed-off-by: Yi Yang Link: https://lore.kernel.org/r/20221126020852.113378-1-yiyang13@huawei.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial-tegra.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c index e5b9773db5e3..1cf08b33456c 100644 --- a/drivers/tty/serial/serial-tegra.c +++ b/drivers/tty/serial/serial-tegra.c @@ -1046,6 +1046,7 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup) if (tup->cdata->fifo_mode_enable_status) { ret = tegra_uart_wait_fifo_mode_enabled(tup); if (ret < 0) { + clk_disable_unprepare(tup->uart_clk); dev_err(tup->uport.dev, "Failed to enable FIFO mode: %d\n", ret); return ret; @@ -1067,6 +1068,7 @@ static int tegra_uart_hw_init(struct tegra_uart_port *tup) */ ret = tegra_set_baudrate(tup, TEGRA_UART_DEFAULT_BAUD); if (ret < 0) { + clk_disable_unprepare(tup->uart_clk); dev_err(tup->uport.dev, "Failed to set baud rate\n"); return ret; } @@ -1226,10 +1228,13 @@ static int tegra_uart_startup(struct uart_port *u) dev_name(u->dev), tup); if (ret < 0) { dev_err(u->dev, "Failed to register ISR for IRQ %d\n", u->irq); - goto fail_hw_init; + goto fail_request_irq; } return 0; +fail_request_irq: + /* tup->uart_clk is already enabled in tegra_uart_hw_init */ + clk_disable_unprepare(tup->uart_clk); fail_hw_init: if (!tup->use_rx_pio) tegra_uart_dma_channel_free(tup, true); -- cgit v1.2.3 From 163f080eb717d237f02d9a8c179b07ed31fdd6ad Mon Sep 17 00:00:00 2001 From: Christoph Niedermaier Date: Fri, 2 Dec 2022 11:41:25 +0100 Subject: serial: core: Add option to output RS485 RX_DURING_TX state via GPIO This patch provides a generic GPIO variable for outputting the state of RS485 RX_DURING_TX. The GPIO is defined by the devicetree property "rs485-rx-during-tx-gpios". To use it in a low level serial driver, the evaluation of this variable must be implemented there accordingly. Signed-off-by: Christoph Niedermaier Link: https://lore.kernel.org/r/20221202104127.122761-2-cniedermaier@dh-electronics.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index b9fbbee598b8..867f2675caca 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3410,6 +3410,7 @@ int uart_get_rs485_mode(struct uart_port *port) struct device *dev = port->dev; u32 rs485_delay[2]; int ret; + int rx_during_tx_gpio_flag; ret = device_property_read_u32_array(dev, "rs485-rts-delay", rs485_delay, 2); @@ -3458,6 +3459,17 @@ int uart_get_rs485_mode(struct uart_port *port) if (port->rs485_term_gpio) port->rs485_supported.flags |= SER_RS485_TERMINATE_BUS; + rx_during_tx_gpio_flag = (rs485conf->flags & SER_RS485_RX_DURING_TX) ? + GPIOD_OUT_HIGH : GPIOD_OUT_LOW; + port->rs485_rx_during_tx_gpio = devm_gpiod_get_optional(dev, + "rs485-rx-during-tx", + rx_during_tx_gpio_flag); + if (IS_ERR(port->rs485_rx_during_tx_gpio)) { + ret = PTR_ERR(port->rs485_rx_during_tx_gpio); + port->rs485_rx_during_tx_gpio = NULL; + return dev_err_probe(dev, ret, "Cannot get rs485-rx-during-tx-gpios\n"); + } + return 0; } EXPORT_SYMBOL_GPL(uart_get_rs485_mode); -- cgit v1.2.3 From ca530cfa968c6fa197ee7df877a277954b87bad5 Mon Sep 17 00:00:00 2001 From: Christoph Niedermaier Date: Fri, 2 Dec 2022 11:41:26 +0100 Subject: serial: imx: Add support for RS485 RX_DURING_TX output GPIO If a RX_DURING_TX GPIO is defined by the DT property "rs485-rx-during-tx-gpios" this patch switches this GPIO accordingly to the RS485 flag RX_DURING_TX in user space. In addition, the i.MX UART receiver is no longer turned on and off during sending, because now the hardware is responsible for connecting or disconnecting RX during TX controlled by this GPIO. Signed-off-by: Christoph Niedermaier Link: https://lore.kernel.org/r/20221202104127.122761-3-cniedermaier@dh-electronics.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 74c9e68fc3bd..f2b43fb497ff 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -476,7 +476,8 @@ static void imx_uart_stop_tx(struct uart_port *port) imx_uart_rts_inactive(sport, &ucr2); imx_uart_writel(sport, ucr2, UCR2); - imx_uart_start_rx(port); + if (!port->rs485_rx_during_tx_gpio) + imx_uart_start_rx(port); sport->tx_state = OFF; } @@ -705,7 +706,8 @@ static void imx_uart_start_tx(struct uart_port *port) imx_uart_rts_inactive(sport, &ucr2); imx_uart_writel(sport, ucr2, UCR2); - if (!(port->rs485.flags & SER_RS485_RX_DURING_TX)) + if (!(port->rs485.flags & SER_RS485_RX_DURING_TX) && + !port->rs485_rx_during_tx_gpio) imx_uart_stop_rx(port); sport->tx_state = WAIT_AFTER_RTS; @@ -1956,6 +1958,10 @@ static int imx_uart_rs485_config(struct uart_port *port, struct ktermios *termio rs485conf->flags & SER_RS485_RX_DURING_TX) imx_uart_start_rx(port); + if (port->rs485_rx_during_tx_gpio) + gpiod_set_value_cansleep(port->rs485_rx_during_tx_gpio, + !!(rs485conf->flags & SER_RS485_RX_DURING_TX)); + return 0; } -- cgit v1.2.3 From c54d48543689f821f6a5ade7e7fa828ada6a1195 Mon Sep 17 00:00:00 2001 From: Christoph Niedermaier Date: Fri, 2 Dec 2022 11:41:27 +0100 Subject: serial: stm32: Add support for rs485 RX_DURING_TX output GPIO If a RX_DURING_TX GPIO is defined by the DT property "rs485-rx-during-tx-gpios" this patch switches this GPIO accordingly to the RS485 flag RX_DURING_TX in user space. Controlled by this GPIO, now the hardware is responsible for connecting or disconnecting RX during TX. Signed-off-by: Christoph Niedermaier Link: https://lore.kernel.org/r/20221202104127.122761-4-cniedermaier@dh-electronics.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/stm32-usart.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c index a1490033aa16..f1b1df78118f 100644 --- a/drivers/tty/serial/stm32-usart.c +++ b/drivers/tty/serial/stm32-usart.c @@ -226,7 +226,11 @@ static int stm32_usart_config_rs485(struct uart_port *port, struct ktermios *ter stm32_usart_clr_bits(port, ofs->cr1, BIT(cfg->uart_enable_bit)); - rs485conf->flags |= SER_RS485_RX_DURING_TX; + if (port->rs485_rx_during_tx_gpio) + gpiod_set_value_cansleep(port->rs485_rx_during_tx_gpio, + !!(rs485conf->flags & SER_RS485_RX_DURING_TX)); + else + rs485conf->flags |= SER_RS485_RX_DURING_TX; if (rs485conf->flags & SER_RS485_ENABLED) { cr1 = readl_relaxed(port->membase + ofs->cr1); -- cgit v1.2.3 From 3bec2f77f1029ac8549aa1f0223b46a987c49855 Mon Sep 17 00:00:00 2001 From: Yuan Can Date: Fri, 25 Nov 2022 09:38:32 +0000 Subject: serial: pic32: Add checks for devm_clk_get() in pic32_uart_probe() As the devm_clk_get() may return ERR_PTR, its return value needs to be checked to avoid invalid poineter dereference. Signed-off-by: Yuan Can Link: https://lore.kernel.org/r/20221125093832.33386-1-yuancan@huawei.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pic32_uart.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c index ba3435263c1f..196a4e678451 100644 --- a/drivers/tty/serial/pic32_uart.c +++ b/drivers/tty/serial/pic32_uart.c @@ -889,6 +889,8 @@ static int pic32_uart_probe(struct platform_device *pdev) sport->irq_rx = irq_of_parse_and_map(np, 1); sport->irq_tx = irq_of_parse_and_map(np, 2); sport->clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(sport->clk)) + return PTR_ERR(sport->clk); sport->dev = &pdev->dev; /* Hardware flow control: gpios -- cgit v1.2.3 From 515be7baeddb04d786e3a7f4072791087c25bb04 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:47 +0200 Subject: tty: Cleanup tty_port_set_initialized() bool parameter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make callers pass true/false consistently for bool val. Reviewed-by: Samuel Iglesias Gonsalvez Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 4 ++-- drivers/tty/moxa.c | 2 +- drivers/tty/mxser.c | 2 +- drivers/tty/n_gsm.c | 4 ++-- drivers/tty/serial/serial_core.c | 6 +++--- drivers/tty/synclink_gt.c | 4 ++-- drivers/tty/tty_port.c | 4 ++-- 7 files changed, 13 insertions(+), 13 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index f52266766df9..f8cdce1626cb 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -502,7 +502,7 @@ static int startup(struct tty_struct *tty, struct serial_state *info) */ change_speed(tty, info, NULL); - tty_port_set_initialized(port, 1); + tty_port_set_initialized(port, true); local_irq_restore(flags); return 0; @@ -556,7 +556,7 @@ static void shutdown(struct tty_struct *tty, struct serial_state *info) set_bit(TTY_IO_ERROR, &tty->flags); - tty_port_set_initialized(&info->tport, 0); + tty_port_set_initialized(&info->tport, false); local_irq_restore(flags); } diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 35b6fddf0341..bc474f3c3f8f 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -1484,7 +1484,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp) MoxaPortLineCtrl(ch, 1, 1); MoxaPortEnable(ch); MoxaSetFifo(ch, ch->type == PORT_16550A); - tty_port_set_initialized(&ch->port, 1); + tty_port_set_initialized(&ch->port, true); } mutex_unlock(&ch->port.mutex); mutex_unlock(&moxa_openlock); diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 2436e0b10f9a..2926a831727d 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -1063,7 +1063,7 @@ static int mxser_set_serial_info(struct tty_struct *tty, } else { retval = mxser_activate(port, tty); if (retval == 0) - tty_port_set_initialized(port, 1); + tty_port_set_initialized(port, true); } mutex_unlock(&port->mutex); return retval; diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 348d85c13f91..ced0e6dc179d 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2059,7 +2059,7 @@ static void gsm_dlci_close(struct gsm_dlci *dlci) tty_port_tty_hangup(&dlci->port, false); gsm_dlci_clear_queues(dlci->gsm, dlci); /* Ensure that gsmtty_open() can return. */ - tty_port_set_initialized(&dlci->port, 0); + tty_port_set_initialized(&dlci->port, false); wake_up_interruptible(&dlci->port.open_wait); } else dlci->gsm->dead = true; @@ -3880,7 +3880,7 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) dlci->modem_rx = 0; /* We could in theory open and close before we wait - eg if we get a DM straight back. This is ok as that will have caused a hangup */ - tty_port_set_initialized(port, 1); + tty_port_set_initialized(port, true); /* Start sending off SABM messages */ if (gsm->initiator) gsm_dlci_begin_open(dlci); diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 867f2675caca..ebc3de0e83a8 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -290,7 +290,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) set_bit(TTY_IO_ERROR, &tty->flags); if (tty_port_initialized(port)) { - tty_port_set_initialized(port, 0); + tty_port_set_initialized(port, false); /* * Turn off DTR and RTS early. @@ -2347,7 +2347,7 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) unsigned int mctrl; tty_port_set_suspended(port, 1); - tty_port_set_initialized(port, 0); + tty_port_set_initialized(port, false); spin_lock_irq(&uport->lock); ops->stop_tx(uport); @@ -2458,7 +2458,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) uart_rs485_config(uport); ops->start_tx(uport); spin_unlock_irq(&uport->lock); - tty_port_set_initialized(port, 1); + tty_port_set_initialized(port, true); } else { /* * Failed to resume - maybe hardware went away? diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 72b76cdde534..2b96bf0ecafb 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -2354,7 +2354,7 @@ static int startup(struct slgt_info *info) if (info->port.tty) clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - tty_port_set_initialized(&info->port, 1); + tty_port_set_initialized(&info->port, true); return 0; } @@ -2401,7 +2401,7 @@ static void shutdown(struct slgt_info *info) if (info->port.tty) set_bit(TTY_IO_ERROR, &info->port.tty->flags); - tty_port_set_initialized(&info->port, 0); + tty_port_set_initialized(&info->port, false); } static void program_hw(struct slgt_info *info) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index dce08a6d7b5e..0c00d5bd6c88 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -367,7 +367,7 @@ static void tty_port_shutdown(struct tty_port *port, struct tty_struct *tty) goto out; if (tty_port_initialized(port)) { - tty_port_set_initialized(port, 0); + tty_port_set_initialized(port, false); /* * Drop DTR/RTS if HUPCL is set. This causes any attached * modem to hang up the line. @@ -788,7 +788,7 @@ int tty_port_open(struct tty_port *port, struct tty_struct *tty, return retval; } } - tty_port_set_initialized(port, 1); + tty_port_set_initialized(port, true); } mutex_unlock(&port->mutex); return tty_port_block_til_ready(port, tty, filp); -- cgit v1.2.3 From 75b20a2ac425b94f06957fb9963e89123a51866c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:48 +0200 Subject: tty: Cleamup tty_port_set_suspended() bool parameter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make callers pass true/false consistently for bool val. Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index ebc3de0e83a8..b06879af2248 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -312,7 +312,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) * a DCD drop (hangup) at just the right time. Clear suspended bit so * we don't try to resume a port that has been shutdown. */ - tty_port_set_suspended(port, 0); + tty_port_set_suspended(port, false); /* * Do not free() the transmit buffer page under the port lock since @@ -1725,7 +1725,7 @@ static void uart_tty_port_shutdown(struct tty_port *port) * a DCD drop (hangup) at just the right time. Clear suspended bit so * we don't try to resume a port that has been shutdown. */ - tty_port_set_suspended(port, 0); + tty_port_set_suspended(port, false); /* * Free the transmit buffer. @@ -2346,7 +2346,7 @@ int uart_suspend_port(struct uart_driver *drv, struct uart_port *uport) int tries; unsigned int mctrl; - tty_port_set_suspended(port, 1); + tty_port_set_suspended(port, true); tty_port_set_initialized(port, false); spin_lock_irq(&uport->lock); @@ -2469,7 +2469,7 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) } } - tty_port_set_suspended(port, 0); + tty_port_set_suspended(port, false); } mutex_unlock(&port->mutex); -- cgit v1.2.3 From 9b5aa54986fc85f5e10045348a8a45894aeb18db Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:49 +0200 Subject: tty: Cleanup tty_port_set_active() bool parameter MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make callers pass true/false consistently for bool val. Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-4-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 2 +- drivers/tty/serial/serial_core.c | 4 ++-- drivers/tty/synclink_gt.c | 6 +++--- drivers/tty/tty_port.c | 10 +++++----- 4 files changed, 11 insertions(+), 11 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index f8cdce1626cb..460d33a1e70b 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1329,7 +1329,7 @@ static void rs_hangup(struct tty_struct *tty) rs_flush_buffer(tty); shutdown(tty, info); info->tport.count = 0; - tty_port_set_active(&info->tport, 0); + tty_port_set_active(&info->tport, false); info->tport.tty = NULL; wake_up_interruptible(&info->tport.open_wait); } diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index b06879af2248..7752bdb680e7 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1827,7 +1827,7 @@ static void uart_hangup(struct tty_struct *tty) spin_lock_irqsave(&port->lock, flags); port->count = 0; spin_unlock_irqrestore(&port->lock, flags); - tty_port_set_active(port, 0); + tty_port_set_active(port, false); tty_port_tty_set(port, NULL); if (uport && !uart_console(uport)) uart_change_pm(state, UART_PM_STATE_OFF); @@ -1945,7 +1945,7 @@ static int uart_port_activate(struct tty_port *port, struct tty_struct *tty) */ ret = uart_startup(tty, state, 0); if (ret > 0) - tty_port_set_active(port, 1); + tty_port_set_active(port, true); return ret; } diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 2b96bf0ecafb..81c94906f06e 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -694,7 +694,7 @@ static void hangup(struct tty_struct *tty) info->port.count = 0; info->port.tty = NULL; spin_unlock_irqrestore(&info->port.lock, flags); - tty_port_set_active(&info->port, 0); + tty_port_set_active(&info->port, false); mutex_unlock(&info->port.mutex); wake_up_interruptible(&info->port.open_wait); @@ -3169,7 +3169,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, if (filp->f_flags & O_NONBLOCK || tty_io_error(tty)) { /* nonblock mode is set or port is not enabled */ - tty_port_set_active(port, 1); + tty_port_set_active(port, true); return 0; } @@ -3226,7 +3226,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, port->blocked_open--; if (!retval) - tty_port_set_active(port, 1); + tty_port_set_active(port, true); DBGINFO(("%s block_til_ready ready, rc=%d\n", tty->driver->name, retval)); return retval; diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 0c00d5bd6c88..469de3c010b8 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -403,7 +403,7 @@ void tty_port_hangup(struct tty_port *port) set_bit(TTY_IO_ERROR, &tty->flags); port->tty = NULL; spin_unlock_irqrestore(&port->lock, flags); - tty_port_set_active(port, 0); + tty_port_set_active(port, false); tty_port_shutdown(port, tty); tty_kref_put(tty); wake_up_interruptible(&port->open_wait); @@ -518,14 +518,14 @@ int tty_port_block_til_ready(struct tty_port *port, * the port has just hung up or is in another error state. */ if (tty_io_error(tty)) { - tty_port_set_active(port, 1); + tty_port_set_active(port, true); return 0; } if (filp == NULL || (filp->f_flags & O_NONBLOCK)) { /* Indicate we are open */ if (C_BAUD(tty)) tty_port_raise_dtr_rts(port); - tty_port_set_active(port, 1); + tty_port_set_active(port, true); return 0; } @@ -588,7 +588,7 @@ int tty_port_block_til_ready(struct tty_port *port, port->blocked_open--; spin_unlock_irqrestore(&port->lock, flags); if (retval == 0) - tty_port_set_active(port, 1); + tty_port_set_active(port, true); return retval; } EXPORT_SYMBOL(tty_port_block_til_ready); @@ -695,7 +695,7 @@ void tty_port_close_end(struct tty_port *port, struct tty_struct *tty) wake_up_interruptible(&port->open_wait); } spin_unlock_irqrestore(&port->lock, flags); - tty_port_set_active(port, 0); + tty_port_set_active(port, false); } EXPORT_SYMBOL(tty_port_close_end); -- cgit v1.2.3 From c2ac4bfa04d19ea23a48fe6045a3740a7e4c7b8b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:50 +0200 Subject: tty: moxa: Make local var storing tty_port_initialized() bool MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return type of tty_port_initialized() is bool, use matching type for the local variable. Also reorder the local vars to reverse-xmas-tree while at it. Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-5-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/moxa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index bc474f3c3f8f..2d9635e14ded 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -1664,8 +1664,8 @@ static int moxa_poll_port(struct moxa_port *p, unsigned int handle, u16 __iomem *ip) { struct tty_struct *tty = tty_port_tty_get(&p->port); + bool inited = tty_port_initialized(&p->port); void __iomem *ofsAddr; - unsigned int inited = tty_port_initialized(&p->port); u16 intr; if (tty) { -- cgit v1.2.3 From dcd794c6ed631b14b5dcfa5afb589ec4f7d0c411 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:51 +0200 Subject: serial: Convert uart_{,port_}startup() init_hw param to bool MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert init_hw parameter in uart_startup() and uart_port_startup() to bool as code treats them like bool. Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-6-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 7752bdb680e7..84a53f6761be 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -182,7 +182,7 @@ static void uart_port_dtr_rts(struct uart_port *uport, int raise) * will be serialised by the per-port mutex. */ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, - int init_hw) + bool init_hw) { struct uart_port *uport = uart_port_check(state); unsigned long flags; @@ -254,7 +254,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, } static int uart_startup(struct tty_struct *tty, struct uart_state *state, - int init_hw) + bool init_hw) { struct tty_port *port = &state->port; int retval; @@ -997,7 +997,7 @@ static int uart_set_info(struct tty_struct *tty, struct tty_port *port, uart_change_speed(tty, state, NULL); } } else { - retval = uart_startup(tty, state, 1); + retval = uart_startup(tty, state, true); if (retval == 0) tty_port_set_initialized(port, true); if (retval > 0) @@ -1165,7 +1165,7 @@ static int uart_do_autoconfig(struct tty_struct *tty, struct uart_state *state) */ uport->ops->config_port(uport, flags); - ret = uart_startup(tty, state, 1); + ret = uart_startup(tty, state, true); if (ret == 0) tty_port_set_initialized(port, true); if (ret > 0) @@ -1943,7 +1943,7 @@ static int uart_port_activate(struct tty_port *port, struct tty_struct *tty) /* * Start up the serial port. */ - ret = uart_startup(tty, state, 0); + ret = uart_startup(tty, state, false); if (ret > 0) tty_port_set_active(port, true); -- cgit v1.2.3 From b300fb26c59a749bf49559932fa8a85eb916b5a7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:52 +0200 Subject: tty: Convert ->carrier_raised() and callchains to bool MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Return boolean from ->carrier_raised() instead of 0 and 1. Make the return type change also to tty_port_carrier_raised() that makes the ->carrier_raised() call (+ cd variable in moxa into which its return value is stored). Also cleans up a few unnecessary constructs related to this change: return xx ? 1 : 0; -> return xx; if (xx) return 1; return 0; -> return xx; Reviewed-by: Jiri Slaby Acked-by: Ulf Hansson # For MMC Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-7-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 2 +- drivers/tty/moxa.c | 4 ++-- drivers/tty/mxser.c | 5 +++-- drivers/tty/n_gsm.c | 8 ++++---- drivers/tty/serial/serial_core.c | 9 ++++----- drivers/tty/synclink_gt.c | 7 ++++--- drivers/tty/tty_port.c | 4 ++-- 7 files changed, 20 insertions(+), 19 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 460d33a1e70b..01c4fd3ce7c8 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1454,7 +1454,7 @@ static const struct tty_operations serial_ops = { .proc_show = rs_proc_show, }; -static int amiga_carrier_raised(struct tty_port *port) +static bool amiga_carrier_raised(struct tty_port *port) { return !(ciab.pra & SER_DCD); } diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 2d9635e14ded..6a1e78e33a2c 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -501,7 +501,7 @@ static int moxa_tiocmset(struct tty_struct *tty, static void moxa_poll(struct timer_list *); static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *); static void moxa_shutdown(struct tty_port *); -static int moxa_carrier_raised(struct tty_port *); +static bool moxa_carrier_raised(struct tty_port *); static void moxa_dtr_rts(struct tty_port *, int); /* * moxa board interface functions: @@ -1432,7 +1432,7 @@ static void moxa_shutdown(struct tty_port *port) MoxaPortFlushData(ch, 2); } -static int moxa_carrier_raised(struct tty_port *port) +static bool moxa_carrier_raised(struct tty_port *port) { struct moxa_port *ch = container_of(port, struct moxa_port, port); int dcd; diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 2926a831727d..96c72e691cd7 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -458,10 +458,11 @@ static void __mxser_stop_tx(struct mxser_port *info) outb(info->IER, info->ioaddr + UART_IER); } -static int mxser_carrier_raised(struct tty_port *port) +static bool mxser_carrier_raised(struct tty_port *port) { struct mxser_port *mp = container_of(port, struct mxser_port, port); - return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0; + + return inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD; } static void mxser_dtr_rts(struct tty_port *port, int on) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index ced0e6dc179d..64abc5fbf2c1 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -3770,16 +3770,16 @@ static int gsm_modem_update(struct gsm_dlci *dlci, u8 brk) return -EPROTONOSUPPORT; } -static int gsm_carrier_raised(struct tty_port *port) +static bool gsm_carrier_raised(struct tty_port *port) { struct gsm_dlci *dlci = container_of(port, struct gsm_dlci, port); struct gsm_mux *gsm = dlci->gsm; /* Not yet open so no carrier info */ if (dlci->state != DLCI_OPEN) - return 0; + return false; if (debug & DBG_CD_ON) - return 1; + return true; /* * Basic mode with control channel in ADM mode may not respond @@ -3787,7 +3787,7 @@ static int gsm_carrier_raised(struct tty_port *port) */ if (gsm->encoding == GSM_BASIC_OPT && gsm->dlci[0]->mode == DLCI_MODE_ADM && !dlci->modem_rx) - return 1; + return true; return dlci->modem_rx & TIOCM_CD; } diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 84a53f6761be..ddf14c4f4bf5 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -1861,7 +1861,7 @@ static void uart_port_shutdown(struct tty_port *port) } } -static int uart_carrier_raised(struct tty_port *port) +static bool uart_carrier_raised(struct tty_port *port) { struct uart_state *state = container_of(port, struct uart_state, port); struct uart_port *uport; @@ -1875,15 +1875,14 @@ static int uart_carrier_raised(struct tty_port *port) * continue and not sleep */ if (WARN_ON(!uport)) - return 1; + return true; spin_lock_irq(&uport->lock); uart_enable_ms(uport); mctrl = uport->ops->get_mctrl(uport); spin_unlock_irq(&uport->lock); uart_port_deref(uport); - if (mctrl & TIOCM_CAR) - return 1; - return 0; + + return mctrl & TIOCM_CAR; } static void uart_dtr_rts(struct tty_port *port, int raise) diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 81c94906f06e..4ba71ec764f7 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3126,7 +3126,7 @@ static int tiocmset(struct tty_struct *tty, return 0; } -static int carrier_raised(struct tty_port *port) +static bool carrier_raised(struct tty_port *port) { unsigned long flags; struct slgt_info *info = container_of(port, struct slgt_info, port); @@ -3134,7 +3134,8 @@ static int carrier_raised(struct tty_port *port) spin_lock_irqsave(&info->lock,flags); get_gtsignals(info); spin_unlock_irqrestore(&info->lock,flags); - return (info->signals & SerialSignal_DCD) ? 1 : 0; + + return info->signals & SerialSignal_DCD; } static void dtr_rts(struct tty_port *port, int on) @@ -3162,7 +3163,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, int retval; bool do_clocal = false; unsigned long flags; - int cd; + bool cd; struct tty_port *port = &info->port; DBGINFO(("%s block_til_ready\n", tty->driver->name)); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 469de3c010b8..a573c500f95b 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -444,10 +444,10 @@ EXPORT_SYMBOL_GPL(tty_port_tty_wakeup); * to hide some internal details. This will eventually become entirely * internal to the tty port. */ -int tty_port_carrier_raised(struct tty_port *port) +bool tty_port_carrier_raised(struct tty_port *port) { if (port->ops->carrier_raised == NULL) - return 1; + return true; return port->ops->carrier_raised(port); } EXPORT_SYMBOL(tty_port_carrier_raised); -- cgit v1.2.3 From 5d420399073770134d2b03e004b2c0201c7fa26f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:53 +0200 Subject: tty: Convert ->dtr_rts() to take bool argument MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert the raise/on parameter in ->dtr_rts() to bool through the callchain. The parameter is used like bool. In USB serial, there remains a few implicit bool -> larger type conversions because some devices use u8 in their control messages. In moxa_tiocmget(), dtr variable was reused for line status which requires int so use a separate variable for status. Reviewed-by: Jiri Slaby Acked-by: Ulf Hansson # For MMC Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-8-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 2 +- drivers/tty/hvc/hvc_console.c | 4 +-- drivers/tty/hvc/hvc_console.h | 2 +- drivers/tty/hvc/hvc_iucv.c | 4 +-- drivers/tty/moxa.c | 54 +++++++++++++++++++++------------------- drivers/tty/mxser.c | 2 +- drivers/tty/n_gsm.c | 2 +- drivers/tty/serial/serial_core.c | 8 +++--- drivers/tty/synclink_gt.c | 2 +- drivers/tty/tty_port.c | 4 +-- 10 files changed, 43 insertions(+), 41 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 01c4fd3ce7c8..29d4c554f6b8 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1459,7 +1459,7 @@ static bool amiga_carrier_raised(struct tty_port *port) return !(ciab.pra & SER_DCD); } -static void amiga_dtr_rts(struct tty_port *port, int raise) +static void amiga_dtr_rts(struct tty_port *port, bool raise) { struct serial_state *info = container_of(port, struct serial_state, tport); diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index a683e21df19c..10c10cfdf92a 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -376,7 +376,7 @@ static int hvc_open(struct tty_struct *tty, struct file * filp) /* We are ready... raise DTR/RTS */ if (C_BAUD(tty)) if (hp->ops->dtr_rts) - hp->ops->dtr_rts(hp, 1); + hp->ops->dtr_rts(hp, true); tty_port_set_initialized(&hp->port, true); } @@ -406,7 +406,7 @@ static void hvc_close(struct tty_struct *tty, struct file * filp) if (C_HUPCL(tty)) if (hp->ops->dtr_rts) - hp->ops->dtr_rts(hp, 0); + hp->ops->dtr_rts(hp, false); if (hp->ops->notifier_del) hp->ops->notifier_del(hp, hp->data); diff --git a/drivers/tty/hvc/hvc_console.h b/drivers/tty/hvc/hvc_console.h index 18d005814e4b..6d3428bf868f 100644 --- a/drivers/tty/hvc/hvc_console.h +++ b/drivers/tty/hvc/hvc_console.h @@ -66,7 +66,7 @@ struct hv_ops { int (*tiocmset)(struct hvc_struct *hp, unsigned int set, unsigned int clear); /* Callbacks to handle tty ports */ - void (*dtr_rts)(struct hvc_struct *hp, int raise); + void (*dtr_rts)(struct hvc_struct *hp, bool raise); }; /* Register a vterm and a slot index for use as a console (console_init) */ diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index 7d49a872de48..fe862a6882d6 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -658,13 +658,13 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id) /** * hvc_iucv_dtr_rts() - HVC notifier for handling DTR/RTS * @hp: Pointer the HVC device (struct hvc_struct) - * @raise: Non-zero to raise or zero to lower DTR/RTS lines + * @raise: True to raise or false to lower DTR/RTS lines * * This routine notifies the HVC back-end to raise or lower DTR/RTS * lines. Raising DTR/RTS is ignored. Lowering DTR/RTS indicates to * drop the IUCV connection (similar to hang up the modem). */ -static void hvc_iucv_dtr_rts(struct hvc_struct *hp, int raise) +static void hvc_iucv_dtr_rts(struct hvc_struct *hp, bool raise) { struct hvc_iucv_private *priv; struct iucv_path *path; diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 6a1e78e33a2c..9be3d585d5a9 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -502,15 +502,15 @@ static void moxa_poll(struct timer_list *); static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *); static void moxa_shutdown(struct tty_port *); static bool moxa_carrier_raised(struct tty_port *); -static void moxa_dtr_rts(struct tty_port *, int); +static void moxa_dtr_rts(struct tty_port *, bool); /* * moxa board interface functions: */ static void MoxaPortEnable(struct moxa_port *); static void MoxaPortDisable(struct moxa_port *); static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); -static int MoxaPortGetLineOut(struct moxa_port *, int *, int *); -static void MoxaPortLineCtrl(struct moxa_port *, int, int); +static int MoxaPortGetLineOut(struct moxa_port *, bool *, bool *); +static void MoxaPortLineCtrl(struct moxa_port *, bool, bool); static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); static int MoxaPortLineStatus(struct moxa_port *); static void MoxaPortFlushData(struct moxa_port *, int); @@ -1443,7 +1443,7 @@ static bool moxa_carrier_raised(struct tty_port *port) return dcd; } -static void moxa_dtr_rts(struct tty_port *port, int onoff) +static void moxa_dtr_rts(struct tty_port *port, bool onoff) { struct moxa_port *ch = container_of(port, struct moxa_port, port); MoxaPortLineCtrl(ch, onoff, onoff); @@ -1481,7 +1481,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp) if (!tty_port_initialized(&ch->port)) { ch->statusflags = 0; moxa_set_tty_param(tty, &tty->termios); - MoxaPortLineCtrl(ch, 1, 1); + MoxaPortLineCtrl(ch, true, true); MoxaPortEnable(ch); MoxaSetFifo(ch, ch->type == PORT_16550A); tty_port_set_initialized(&ch->port, true); @@ -1557,19 +1557,21 @@ static unsigned int moxa_chars_in_buffer(struct tty_struct *tty) static int moxa_tiocmget(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; - int flag = 0, dtr, rts; + bool dtr, rts; + int flag = 0; + int status; MoxaPortGetLineOut(ch, &dtr, &rts); if (dtr) flag |= TIOCM_DTR; if (rts) flag |= TIOCM_RTS; - dtr = MoxaPortLineStatus(ch); - if (dtr & 1) + status = MoxaPortLineStatus(ch); + if (status & 1) flag |= TIOCM_CTS; - if (dtr & 2) + if (status & 2) flag |= TIOCM_DSR; - if (dtr & 4) + if (status & 4) flag |= TIOCM_CD; return flag; } @@ -1578,7 +1580,7 @@ static int moxa_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { struct moxa_port *ch; - int dtr, rts; + bool dtr, rts; mutex_lock(&moxa_openlock); ch = tty->driver_data; @@ -1589,13 +1591,13 @@ static int moxa_tiocmset(struct tty_struct *tty, MoxaPortGetLineOut(ch, &dtr, &rts); if (set & TIOCM_RTS) - rts = 1; + rts = true; if (set & TIOCM_DTR) - dtr = 1; + dtr = true; if (clear & TIOCM_RTS) - rts = 0; + rts = false; if (clear & TIOCM_DTR) - dtr = 0; + dtr = false; MoxaPortLineCtrl(ch, dtr, rts); mutex_unlock(&moxa_openlock); return 0; @@ -1877,12 +1879,12 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode) * * Function 13: Get the DTR/RTS state of this port. * Syntax: - * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); + * int MoxaPortGetLineOut(int port, bool *dtrState, bool *rtsState); * int port : port number (0 - 127) - * int * dtrState : pointer to INT to receive the current DTR + * bool * dtrState : pointer to bool to receive the current DTR * state. (if NULL, this function will not * write to this address) - * int * rtsState : pointer to INT to receive the current RTS + * bool * rtsState : pointer to bool to receive the current RTS * state. (if NULL, this function will not * write to this address) * @@ -1892,10 +1894,10 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode) * * Function 14: Setting the DTR/RTS output state of this port. * Syntax: - * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); + * void MoxaPortLineCtrl(int port, bool dtrState, bool rtsState); * int port : port number (0 - 127) - * int dtrState : DTR output state (0: off, 1: on) - * int rtsState : RTS output state (0: off, 1: on) + * bool dtrState : DTR output state + * bool rtsState : RTS output state * * * Function 15: Setting the flow control of this port. @@ -2103,18 +2105,18 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, return baud; } -static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState, - int *rtsState) +static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtrState, + bool *rtsState) { if (dtrState) - *dtrState = !!(port->lineCtrl & DTR_ON); + *dtrState = port->lineCtrl & DTR_ON; if (rtsState) - *rtsState = !!(port->lineCtrl & RTS_ON); + *rtsState = port->lineCtrl & RTS_ON; return 0; } -static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts) +static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr, bool rts) { u8 mode = 0; diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 96c72e691cd7..d4fb11e39bb1 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -465,7 +465,7 @@ static bool mxser_carrier_raised(struct tty_port *port) return inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD; } -static void mxser_dtr_rts(struct tty_port *port, int on) +static void mxser_dtr_rts(struct tty_port *port, bool on) { struct mxser_port *mp = container_of(port, struct mxser_port, port); unsigned long flags; diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 64abc5fbf2c1..12b734b1b556 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -3792,7 +3792,7 @@ static bool gsm_carrier_raised(struct tty_port *port) return dlci->modem_rx & TIOCM_CD; } -static void gsm_dtr_rts(struct tty_port *port, int onoff) +static void gsm_dtr_rts(struct tty_port *port, bool onoff) { struct gsm_dlci *dlci = container_of(port, struct gsm_dlci, port); unsigned int modem_tx = dlci->modem_tx; diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index ddf14c4f4bf5..c09c17cf6af6 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -169,7 +169,7 @@ uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear) #define uart_set_mctrl(port, set) uart_update_mctrl(port, set, 0) #define uart_clear_mctrl(port, clear) uart_update_mctrl(port, 0, clear) -static void uart_port_dtr_rts(struct uart_port *uport, int raise) +static void uart_port_dtr_rts(struct uart_port *uport, bool raise) { if (raise) uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS); @@ -239,7 +239,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, * port is open and ready to respond. */ if (init_hw && C_BAUD(tty)) - uart_port_dtr_rts(uport, 1); + uart_port_dtr_rts(uport, true); } /* @@ -302,7 +302,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) } if (!tty || C_HUPCL(tty)) - uart_port_dtr_rts(uport, 0); + uart_port_dtr_rts(uport, false); uart_port_shutdown(port); } @@ -1885,7 +1885,7 @@ static bool uart_carrier_raised(struct tty_port *port) return mctrl & TIOCM_CAR; } -static void uart_dtr_rts(struct tty_port *port, int raise) +static void uart_dtr_rts(struct tty_port *port, bool raise) { struct uart_state *state = container_of(port, struct uart_state, port); struct uart_port *uport; diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 4ba71ec764f7..2b786265ce7b 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3138,7 +3138,7 @@ static bool carrier_raised(struct tty_port *port) return info->signals & SerialSignal_DCD; } -static void dtr_rts(struct tty_port *port, int on) +static void dtr_rts(struct tty_port *port, bool on) { unsigned long flags; struct slgt_info *info = container_of(port, struct slgt_info, port); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index a573c500f95b..a788a6bf487d 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -463,7 +463,7 @@ EXPORT_SYMBOL(tty_port_carrier_raised); void tty_port_raise_dtr_rts(struct tty_port *port) { if (port->ops->dtr_rts) - port->ops->dtr_rts(port, 1); + port->ops->dtr_rts(port, true); } EXPORT_SYMBOL(tty_port_raise_dtr_rts); @@ -478,7 +478,7 @@ EXPORT_SYMBOL(tty_port_raise_dtr_rts); void tty_port_lower_dtr_rts(struct tty_port *port) { if (port->ops->dtr_rts) - port->ops->dtr_rts(port, 0); + port->ops->dtr_rts(port, false); } EXPORT_SYMBOL(tty_port_lower_dtr_rts); -- cgit v1.2.3 From 0388a152fc5544be82e736343496f99c4eef8d62 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:54 +0200 Subject: tty/serial: Make ->dcd_change()+uart_handle_dcd_change() status bool active MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert status parameter for ->dcd_change() and uart_handle_dcd_change() to bool which matches to how the parameter is used. Rename status to active to better describe what the parameter means. Acked-by: Rodolfo Giometti Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-9-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 8 ++++---- drivers/tty/serial/sunhv.c | 8 ++++---- 2 files changed, 8 insertions(+), 8 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index c09c17cf6af6..7319a6f55013 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3252,11 +3252,11 @@ EXPORT_SYMBOL(uart_match_port); /** * uart_handle_dcd_change - handle a change of carrier detect state * @uport: uart_port structure for the open port - * @status: new carrier detect status, nonzero if active + * @active: new carrier detect status * * Caller must hold uport->lock. */ -void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) +void uart_handle_dcd_change(struct uart_port *uport, bool active) { struct tty_port *port = &uport->state->port; struct tty_struct *tty = port->tty; @@ -3268,7 +3268,7 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) ld = tty_ldisc_ref(tty); if (ld) { if (ld->ops->dcd_change) - ld->ops->dcd_change(tty, status); + ld->ops->dcd_change(tty, active); tty_ldisc_deref(ld); } } @@ -3276,7 +3276,7 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) uport->icount.dcd++; if (uart_dcd_enabled(uport)) { - if (status) + if (active) wake_up_interruptible(&port->open_wait); else if (tty) tty_hangup(tty); diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index 16c746a63258..7d38c33ef506 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -87,10 +87,10 @@ static int receive_chars_getchar(struct uart_port *port) if (c == CON_HUP) { hung_up = 1; - uart_handle_dcd_change(port, 0); + uart_handle_dcd_change(port, false); } else if (hung_up) { hung_up = 0; - uart_handle_dcd_change(port, 1); + uart_handle_dcd_change(port, true); } if (port->state == NULL) { @@ -133,7 +133,7 @@ static int receive_chars_read(struct uart_port *port) bytes_read = 1; } else if (stat == CON_HUP) { hung_up = 1; - uart_handle_dcd_change(port, 0); + uart_handle_dcd_change(port, false); continue; } else { /* HV_EWOULDBLOCK, etc. */ @@ -143,7 +143,7 @@ static int receive_chars_read(struct uart_port *port) if (hung_up) { hung_up = 0; - uart_handle_dcd_change(port, 1); + uart_handle_dcd_change(port, true); } if (port->sysrq != 0 && *con_read_page) { -- cgit v1.2.3 From 968d64578ec92968e8c79d766eb966efd1f68d7e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:55 +0200 Subject: serial: Make uart_handle_cts_change() status param bool active MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert uart_handle_cts_change() to bool which is more appropriate than unsigned int. Rename status to active to better describe what the parameter means. While at it, make the comment about the active parameter easier to parse. Cleanup callsites from operations that are not necessary with bool. Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-10-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 2 +- drivers/tty/serial/max3100.c | 2 +- drivers/tty/serial/max310x.c | 3 +-- drivers/tty/serial/serial_core.c | 8 ++++---- 4 files changed, 7 insertions(+), 8 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index f2b43fb497ff..ae75135dccb8 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -773,7 +773,7 @@ static irqreturn_t __imx_uart_rtsint(int irq, void *dev_id) imx_uart_writel(sport, USR1_RTSD, USR1); usr1 = imx_uart_readl(sport, USR1) & USR1_RTSS; - uart_handle_cts_change(&sport->port, !!usr1); + uart_handle_cts_change(&sport->port, usr1); wake_up_interruptible(&sport->port.state->port.delta_msr_wait); return IRQ_HANDLED; diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c index bb74f23251fe..86dcbff8faa3 100644 --- a/drivers/tty/serial/max3100.c +++ b/drivers/tty/serial/max3100.c @@ -247,7 +247,7 @@ static int max3100_handlerx(struct max3100_port *s, u16 rx) cts = (rx & MAX3100_CTS) > 0; if (s->cts != cts) { s->cts = cts; - uart_handle_cts_change(&s->port, cts ? TIOCM_CTS : 0); + uart_handle_cts_change(&s->port, cts); } return ret; diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 4eb24e3407f8..e9cacfe7e032 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -819,8 +819,7 @@ static irqreturn_t max310x_port_irq(struct max310x_port *s, int portno) if (ists & MAX310X_IRQ_CTS_BIT) { lsr = max310x_port_read(port, MAX310X_LSR_IRQSTS_REG); - uart_handle_cts_change(port, - !!(lsr & MAX310X_LSR_CTS_BIT)); + uart_handle_cts_change(port, lsr & MAX310X_LSR_CTS_BIT); } if (rxlen) max310x_handle_rx(port, rxlen); diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 7319a6f55013..371440faa14c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3287,11 +3287,11 @@ EXPORT_SYMBOL_GPL(uart_handle_dcd_change); /** * uart_handle_cts_change - handle a change of clear-to-send state * @uport: uart_port structure for the open port - * @status: new clear to send status, nonzero if active + * @active: new clear-to-send status * * Caller must hold uport->lock. */ -void uart_handle_cts_change(struct uart_port *uport, unsigned int status) +void uart_handle_cts_change(struct uart_port *uport, bool active) { lockdep_assert_held_once(&uport->lock); @@ -3299,13 +3299,13 @@ void uart_handle_cts_change(struct uart_port *uport, unsigned int status) if (uart_softcts_mode(uport)) { if (uport->hw_stopped) { - if (status) { + if (active) { uport->hw_stopped = 0; uport->ops->start_tx(uport); uart_write_wakeup(uport); } } else { - if (!status) { + if (!active) { uport->hw_stopped = 1; uport->ops->stop_tx(uport); } -- cgit v1.2.3 From 87f22db4c251ff92d588c2cc710031a59d5e4ec0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:56 +0200 Subject: tty: Return bool from tty_termios_hw_change() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Change tty_termios_hw_change() to return bool. Reviewed-by: Jiri Slaby Reviewed-by: Johan Hovold Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-11-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_ioctl.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index ce511557b98b..12983ce4e43e 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -270,13 +270,13 @@ EXPORT_SYMBOL(tty_termios_copy_hw); * between the two termios structures, or a speed change is needed. */ -int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b) +bool tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b) { if (a->c_ispeed != b->c_ispeed || a->c_ospeed != b->c_ospeed) - return 1; + return true; if ((a->c_cflag ^ b->c_cflag) & ~(HUPCL | CREAD | CLOCAL)) - return 1; - return 0; + return true; + return false; } EXPORT_SYMBOL(tty_termios_hw_change); -- cgit v1.2.3 From 5701cb8bf50e1c723553344b3f731b308da8ea21 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:57 +0200 Subject: tty: Call ->dtr_rts() parameter active consistently MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Convert various parameter names for ->dtr_rts() and related functions from onoff, on, and raise to active. Reviewed-by: Jiri Slaby Acked-by: Ulf Hansson # For MMC Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-12-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 4 ++-- drivers/tty/hvc/hvc_console.h | 2 +- drivers/tty/hvc/hvc_iucv.c | 6 +++--- drivers/tty/mxser.c | 4 ++-- drivers/tty/n_gsm.c | 4 ++-- drivers/tty/serial/serial_core.c | 8 ++++---- drivers/tty/synclink_gt.c | 4 ++-- 7 files changed, 16 insertions(+), 16 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 29d4c554f6b8..d7515d61659e 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1459,13 +1459,13 @@ static bool amiga_carrier_raised(struct tty_port *port) return !(ciab.pra & SER_DCD); } -static void amiga_dtr_rts(struct tty_port *port, bool raise) +static void amiga_dtr_rts(struct tty_port *port, bool active) { struct serial_state *info = container_of(port, struct serial_state, tport); unsigned long flags; - if (raise) + if (active) info->MCR |= SER_DTR|SER_RTS; else info->MCR &= ~(SER_DTR|SER_RTS); diff --git a/drivers/tty/hvc/hvc_console.h b/drivers/tty/hvc/hvc_console.h index 6d3428bf868f..9668f821db01 100644 --- a/drivers/tty/hvc/hvc_console.h +++ b/drivers/tty/hvc/hvc_console.h @@ -66,7 +66,7 @@ struct hv_ops { int (*tiocmset)(struct hvc_struct *hp, unsigned int set, unsigned int clear); /* Callbacks to handle tty ports */ - void (*dtr_rts)(struct hvc_struct *hp, bool raise); + void (*dtr_rts)(struct hvc_struct *hp, bool active); }; /* Register a vterm and a slot index for use as a console (console_init) */ diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index fe862a6882d6..543f35ddf523 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -658,13 +658,13 @@ static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id) /** * hvc_iucv_dtr_rts() - HVC notifier for handling DTR/RTS * @hp: Pointer the HVC device (struct hvc_struct) - * @raise: True to raise or false to lower DTR/RTS lines + * @active: True to raise or false to lower DTR/RTS lines * * This routine notifies the HVC back-end to raise or lower DTR/RTS * lines. Raising DTR/RTS is ignored. Lowering DTR/RTS indicates to * drop the IUCV connection (similar to hang up the modem). */ -static void hvc_iucv_dtr_rts(struct hvc_struct *hp, bool raise) +static void hvc_iucv_dtr_rts(struct hvc_struct *hp, bool active) { struct hvc_iucv_private *priv; struct iucv_path *path; @@ -672,7 +672,7 @@ static void hvc_iucv_dtr_rts(struct hvc_struct *hp, bool raise) /* Raising the DTR/RTS is ignored as IUCV connections can be * established at any times. */ - if (raise) + if (active) return; priv = hvc_iucv_get_private(hp->vtermno); diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index d4fb11e39bb1..ef3116e87975 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -465,7 +465,7 @@ static bool mxser_carrier_raised(struct tty_port *port) return inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD; } -static void mxser_dtr_rts(struct tty_port *port, bool on) +static void mxser_dtr_rts(struct tty_port *port, bool active) { struct mxser_port *mp = container_of(port, struct mxser_port, port); unsigned long flags; @@ -473,7 +473,7 @@ static void mxser_dtr_rts(struct tty_port *port, bool on) spin_lock_irqsave(&mp->slock, flags); mcr = inb(mp->ioaddr + UART_MCR); - if (on) + if (active) mcr |= UART_MCR_DTR | UART_MCR_RTS; else mcr &= ~(UART_MCR_DTR | UART_MCR_RTS); diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 12b734b1b556..5783801d6524 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -3792,11 +3792,11 @@ static bool gsm_carrier_raised(struct tty_port *port) return dlci->modem_rx & TIOCM_CD; } -static void gsm_dtr_rts(struct tty_port *port, bool onoff) +static void gsm_dtr_rts(struct tty_port *port, bool active) { struct gsm_dlci *dlci = container_of(port, struct gsm_dlci, port); unsigned int modem_tx = dlci->modem_tx; - if (onoff) + if (active) modem_tx |= TIOCM_DTR | TIOCM_RTS; else modem_tx &= ~(TIOCM_DTR | TIOCM_RTS); diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 371440faa14c..8633252339f4 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -169,9 +169,9 @@ uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear) #define uart_set_mctrl(port, set) uart_update_mctrl(port, set, 0) #define uart_clear_mctrl(port, clear) uart_update_mctrl(port, 0, clear) -static void uart_port_dtr_rts(struct uart_port *uport, bool raise) +static void uart_port_dtr_rts(struct uart_port *uport, bool active) { - if (raise) + if (active) uart_set_mctrl(uport, TIOCM_DTR | TIOCM_RTS); else uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); @@ -1885,7 +1885,7 @@ static bool uart_carrier_raised(struct tty_port *port) return mctrl & TIOCM_CAR; } -static void uart_dtr_rts(struct tty_port *port, bool raise) +static void uart_dtr_rts(struct tty_port *port, bool active) { struct uart_state *state = container_of(port, struct uart_state, port); struct uart_port *uport; @@ -1893,7 +1893,7 @@ static void uart_dtr_rts(struct tty_port *port, bool raise) uport = uart_port_ref(state); if (!uport) return; - uart_port_dtr_rts(uport, raise); + uart_port_dtr_rts(uport, active); uart_port_deref(uport); } diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 2b786265ce7b..33f258d6fef9 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3138,13 +3138,13 @@ static bool carrier_raised(struct tty_port *port) return info->signals & SerialSignal_DCD; } -static void dtr_rts(struct tty_port *port, bool on) +static void dtr_rts(struct tty_port *port, bool active) { unsigned long flags; struct slgt_info *info = container_of(port, struct slgt_info, port); spin_lock_irqsave(&info->lock,flags); - if (on) + if (active) info->signals |= SerialSignal_RTS | SerialSignal_DTR; else info->signals &= ~(SerialSignal_RTS | SerialSignal_DTR); -- cgit v1.2.3 From 2d762dab66fa2788cee5e7657610b073e45c41eb Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Tue, 17 Jan 2023 11:03:58 +0200 Subject: tty: moxa: Rename dtr/rts parameters/variables to active MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Use active consistently for naming parameters and variables. Reviewed-by: Jiri Slaby Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230117090358.4796-13-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/moxa.c | 52 ++++++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 26 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 9be3d585d5a9..42fa4c878b2e 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -1443,10 +1443,10 @@ static bool moxa_carrier_raised(struct tty_port *port) return dcd; } -static void moxa_dtr_rts(struct tty_port *port, bool onoff) +static void moxa_dtr_rts(struct tty_port *port, bool active) { struct moxa_port *ch = container_of(port, struct moxa_port, port); - MoxaPortLineCtrl(ch, onoff, onoff); + MoxaPortLineCtrl(ch, active, active); } @@ -1557,14 +1557,14 @@ static unsigned int moxa_chars_in_buffer(struct tty_struct *tty) static int moxa_tiocmget(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; - bool dtr, rts; + bool dtr_active, rts_active; int flag = 0; int status; - MoxaPortGetLineOut(ch, &dtr, &rts); - if (dtr) + MoxaPortGetLineOut(ch, &dtr_active, &rts_active); + if (dtr_active) flag |= TIOCM_DTR; - if (rts) + if (rts_active) flag |= TIOCM_RTS; status = MoxaPortLineStatus(ch); if (status & 1) @@ -1579,8 +1579,8 @@ static int moxa_tiocmget(struct tty_struct *tty) static int moxa_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { + bool dtr_active, rts_active; struct moxa_port *ch; - bool dtr, rts; mutex_lock(&moxa_openlock); ch = tty->driver_data; @@ -1589,16 +1589,16 @@ static int moxa_tiocmset(struct tty_struct *tty, return -EINVAL; } - MoxaPortGetLineOut(ch, &dtr, &rts); + MoxaPortGetLineOut(ch, &dtr_active, &rts_active); if (set & TIOCM_RTS) - rts = true; + rts_active = true; if (set & TIOCM_DTR) - dtr = true; + dtr_active = true; if (clear & TIOCM_RTS) - rts = false; + rts_active = false; if (clear & TIOCM_DTR) - dtr = false; - MoxaPortLineCtrl(ch, dtr, rts); + dtr_active = false; + MoxaPortLineCtrl(ch, dtr_active, rts_active); mutex_unlock(&moxa_openlock); return 0; } @@ -1881,10 +1881,10 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode) * Syntax: * int MoxaPortGetLineOut(int port, bool *dtrState, bool *rtsState); * int port : port number (0 - 127) - * bool * dtrState : pointer to bool to receive the current DTR + * bool * dtr_active : pointer to bool to receive the current DTR * state. (if NULL, this function will not * write to this address) - * bool * rtsState : pointer to bool to receive the current RTS + * bool * rts_active : pointer to bool to receive the current RTS * state. (if NULL, this function will not * write to this address) * @@ -1896,8 +1896,8 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode) * Syntax: * void MoxaPortLineCtrl(int port, bool dtrState, bool rtsState); * int port : port number (0 - 127) - * bool dtrState : DTR output state - * bool rtsState : RTS output state + * bool dtr_active : DTR output state + * bool rts_active : RTS output state * * * Function 15: Setting the flow control of this port. @@ -2105,24 +2105,24 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, return baud; } -static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtrState, - bool *rtsState) +static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtr_active, + bool *rts_active) { - if (dtrState) - *dtrState = port->lineCtrl & DTR_ON; - if (rtsState) - *rtsState = port->lineCtrl & RTS_ON; + if (dtr_active) + *dtr_active = port->lineCtrl & DTR_ON; + if (rts_active) + *rts_active = port->lineCtrl & RTS_ON; return 0; } -static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr, bool rts) +static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr_active, bool rts_active) { u8 mode = 0; - if (dtr) + if (dtr_active) mode |= DTR_ON; - if (rts) + if (rts_active) mode |= RTS_ON; port->lineCtrl = mode; moxafunc(port->tableAddr, FC_LineControl, mode); -- cgit v1.2.3 From e34a79d0b320ea8248e1ee3482eb5c388a27d303 Mon Sep 17 00:00:00 2001 From: Matthew Gerlach Date: Sun, 15 Jan 2023 07:14:47 -0800 Subject: tty: serial: 8250: add DFL bus driver for Altera 16550. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a Device Feature List (DFL) bus driver for the Altera 16550 implementation of UART. Signed-off-by: Matthew Gerlach Reviewed-by: Ilpo Järvinen Reviewed-by: Andy Shevchenko Reviewed-by: Marco Pagani Link: https://lore.kernel.org/r/20230115151447.1353428-5-matthew.gerlach@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_dfl.c | 167 +++++++++++++++++++++++++++++++++++++ drivers/tty/serial/8250/Kconfig | 12 +++ drivers/tty/serial/8250/Makefile | 1 + 3 files changed, 180 insertions(+) create mode 100644 drivers/tty/serial/8250/8250_dfl.c (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_dfl.c b/drivers/tty/serial/8250/8250_dfl.c new file mode 100644 index 000000000000..6c5ff019df4b --- /dev/null +++ b/drivers/tty/serial/8250/8250_dfl.c @@ -0,0 +1,167 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for FPGA UART + * + * Copyright (C) 2022 Intel Corporation. + * + * Authors: + * Ananda Ravuri + * Matthew Gerlach + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define DFHv1_PARAM_ID_CLK_FRQ 0x2 +#define DFHv1_PARAM_ID_FIFO_LEN 0x3 + +#define DFHv1_PARAM_ID_REG_LAYOUT 0x4 +#define DFHv1_PARAM_REG_LAYOUT_WIDTH GENMASK_ULL(63, 32) +#define DFHv1_PARAM_REG_LAYOUT_SHIFT GENMASK_ULL(31, 0) + +struct dfl_uart { + int line; +}; + +static int dfh_get_u64_param_val(struct dfl_device *dfl_dev, int param_id, u64 *pval) +{ + size_t psize; + u64 *p; + + p = dfh_find_param(dfl_dev, param_id, &psize); + if (IS_ERR(p)) + return PTR_ERR(p); + + if (psize != sizeof(*pval)) + return -EINVAL; + + *pval = *p; + + return 0; +} + +static int dfl_uart_get_params(struct dfl_device *dfl_dev, struct uart_8250_port *uart) +{ + struct device *dev = &dfl_dev->dev; + u64 fifo_len, clk_freq, reg_layout; + u32 reg_width; + int ret; + + ret = dfh_get_u64_param_val(dfl_dev, DFHv1_PARAM_ID_CLK_FRQ, &clk_freq); + if (ret) + return dev_err_probe(dev, ret, "missing CLK_FRQ param\n"); + + uart->port.uartclk = clk_freq; + + ret = dfh_get_u64_param_val(dfl_dev, DFHv1_PARAM_ID_FIFO_LEN, &fifo_len); + if (ret) + return dev_err_probe(dev, ret, "missing FIFO_LEN param\n"); + + switch (fifo_len) { + case 32: + uart->port.type = PORT_ALTR_16550_F32; + break; + + case 64: + uart->port.type = PORT_ALTR_16550_F64; + break; + + case 128: + uart->port.type = PORT_ALTR_16550_F128; + break; + + default: + return dev_err_probe(dev, -EINVAL, "unsupported FIFO_LEN %llu\n", fifo_len); + } + + ret = dfh_get_u64_param_val(dfl_dev, DFHv1_PARAM_ID_REG_LAYOUT, ®_layout); + if (ret) + return dev_err_probe(dev, ret, "missing REG_LAYOUT param\n"); + + uart->port.regshift = FIELD_GET(DFHv1_PARAM_REG_LAYOUT_SHIFT, reg_layout); + reg_width = FIELD_GET(DFHv1_PARAM_REG_LAYOUT_WIDTH, reg_layout); + switch (reg_width) { + case 4: + uart->port.iotype = UPIO_MEM32; + break; + + case 2: + uart->port.iotype = UPIO_MEM16; + break; + + default: + return dev_err_probe(dev, -EINVAL, "unsupported reg-width %u\n", reg_width); + + } + + return 0; +} + +static int dfl_uart_probe(struct dfl_device *dfl_dev) +{ + struct device *dev = &dfl_dev->dev; + struct uart_8250_port uart = { }; + struct dfl_uart *dfluart; + int ret; + + uart.port.flags = UPF_IOREMAP; + uart.port.mapbase = dfl_dev->mmio_res.start; + uart.port.mapsize = resource_size(&dfl_dev->mmio_res); + + ret = dfl_uart_get_params(dfl_dev, &uart); + if (ret < 0) + return dev_err_probe(dev, ret, "failed uart feature walk\n"); + + if (dfl_dev->num_irqs == 1) + uart.port.irq = dfl_dev->irqs[0]; + + dfluart = devm_kzalloc(dev, sizeof(*dfluart), GFP_KERNEL); + if (!dfluart) + return -ENOMEM; + + dfluart->line = serial8250_register_8250_port(&uart); + if (dfluart->line < 0) + return dev_err_probe(dev, dfluart->line, "unable to register 8250 port.\n"); + + dev_set_drvdata(dev, dfluart); + + return 0; +} + +static void dfl_uart_remove(struct dfl_device *dfl_dev) +{ + struct dfl_uart *dfluart = dev_get_drvdata(&dfl_dev->dev); + + serial8250_unregister_port(dfluart->line); +} + +#define FME_FEATURE_ID_UART 0x24 + +static const struct dfl_device_id dfl_uart_ids[] = { + { FME_ID, FME_FEATURE_ID_UART }, + { } +}; +MODULE_DEVICE_TABLE(dfl, dfl_uart_ids); + +static struct dfl_driver dfl_uart_driver = { + .drv = { + .name = "dfl-uart", + }, + .id_table = dfl_uart_ids, + .probe = dfl_uart_probe, + .remove = dfl_uart_remove, +}; +module_dfl_driver(dfl_uart_driver); + +MODULE_DESCRIPTION("DFL Intel UART driver"); +MODULE_AUTHOR("Intel Corporation"); +MODULE_LICENSE("GPL"); diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index b0f62345bc84..020ef532940d 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -370,6 +370,18 @@ config SERIAL_8250_FSL erratum for Freescale 16550 UARTs in the 8250 driver. It also enables support for ACPI enumeration. +config SERIAL_8250_DFL + tristate "DFL bus driver for Altera 16550 UART" + depends on SERIAL_8250 && FPGA_DFL + help + This option enables support for a Device Feature List (DFL) bus + driver for the Altera 16550 UART. One or more Altera 16550 UARTs + can be instantiated in a FPGA and then be discovered during + enumeration of the DFL bus. + + To compile this driver as a module, chose M here: the + module will be called 8250_dfl. + config SERIAL_8250_DW tristate "Support for Synopsys DesignWare 8250 quirks" depends on SERIAL_8250 diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index 1615bfdde2a0..4e1a32812683 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -28,6 +28,7 @@ obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o obj-$(CONFIG_SERIAL_8250_MEN_MCB) += 8250_men_mcb.o +obj-$(CONFIG_SERIAL_8250_DFL) += 8250_dfl.o obj-$(CONFIG_SERIAL_8250_DW) += 8250_dw.o obj-$(CONFIG_SERIAL_8250_EM) += 8250_em.o obj-$(CONFIG_SERIAL_8250_IOC3) += 8250_ioc3.o -- cgit v1.2.3 From ffc1e089725e3f8a15ddfdce283db42f7d0fa147 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Thu, 19 Jan 2023 16:19:15 +0100 Subject: VT: Add height parameter to con_font_get/set consw operations The current con_font_get/set API currently hardcodes a 32-pixel-tall limitation, which only dates from the old VGA hardware which could not handle taller fonts than that. This change just adds a vpitch parameter to release this constraint. Drivers which do not support vpitch != 32 can just return EINVAL when it is not 32, font loading tools will revert to trying 32 and succeed. This change makes the fbcon driver consider vpitch appropriately, thus making it able to load large fonts. Signed-off-by: Samuel Thibault Link: https://lore.kernel.org/r/20230119151934.932642243@ens-lyon.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 71f182416835..268d0f57fdd4 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -4552,7 +4552,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) if (vc->vc_mode != KD_TEXT) rc = -EINVAL; else if (vc->vc_sw->con_font_get) - rc = vc->vc_sw->con_font_get(vc, &font); + rc = vc->vc_sw->con_font_get(vc, &font, 32); else rc = -ENOSYS; console_unlock(); @@ -4613,7 +4613,7 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op) else if (vc->vc_sw->con_font_set) { if (vc_is_sel(vc)) clear_selection(); - rc = vc->vc_sw->con_font_set(vc, &font, op->flags); + rc = vc->vc_sw->con_font_set(vc, &font, 32, op->flags); } else rc = -ENOSYS; console_unlock(); -- cgit v1.2.3 From 24d69384bcd34b9dcaf5dab744bf7096e84d1abd Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Thu, 19 Jan 2023 16:19:16 +0100 Subject: VT: Add KD_FONT_OP_SET/GET_TALL operations The KD_FONT_OP_SET/GET operations hardcode vpitch to be 32 pixels, which only dates from the old VGA hardware which as asserting this. Drivers such as fbcon however do not have such limitation, so this introduces KD_FONT_OP_SET/GET_TALL operations, which userland can try to use to avoid this limitation, thus opening the patch to >32 pixels font height. Signed-off-by: Samuel Thibault Link: https://lore.kernel.org/r/20230119151935.013597162@ens-lyon.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 268d0f57fdd4..8da7ab34b8fd 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -4540,6 +4540,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) struct console_font font; int rc = -EINVAL; int c; + unsigned int vpitch = op->op == KD_FONT_OP_GET_TALL ? op->height : 32; if (op->data) { font.data = kmalloc(max_font_size, GFP_KERNEL); @@ -4552,7 +4553,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) if (vc->vc_mode != KD_TEXT) rc = -EINVAL; else if (vc->vc_sw->con_font_get) - rc = vc->vc_sw->con_font_get(vc, &font, 32); + rc = vc->vc_sw->con_font_get(vc, &font, vpitch); else rc = -ENOSYS; console_unlock(); @@ -4560,7 +4561,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) if (rc) goto out; - c = (font.width+7)/8 * 32 * font.charcount; + c = (font.width+7)/8 * vpitch * font.charcount; if (op->data && font.charcount > op->charcount) rc = -ENOSPC; @@ -4586,6 +4587,7 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op) struct console_font font; int rc = -EINVAL; int size; + unsigned int vpitch = op->op == KD_FONT_OP_SET_TALL ? op->height : 32; if (vc->vc_mode != KD_TEXT) return -EINVAL; @@ -4595,7 +4597,9 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op) return -EINVAL; if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32) return -EINVAL; - size = (op->width+7)/8 * 32 * op->charcount; + if (vpitch < op->height) + return -EINVAL; + size = (op->width+7)/8 * vpitch * op->charcount; if (size > max_font_size) return -ENOSPC; @@ -4613,7 +4617,7 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op) else if (vc->vc_sw->con_font_set) { if (vc_is_sel(vc)) clear_selection(); - rc = vc->vc_sw->con_font_set(vc, &font, 32, op->flags); + rc = vc->vc_sw->con_font_set(vc, &font, vpitch, op->flags); } else rc = -ENOSYS; console_unlock(); @@ -4659,8 +4663,10 @@ int con_font_op(struct vc_data *vc, struct console_font_op *op) { switch (op->op) { case KD_FONT_OP_SET: + case KD_FONT_OP_SET_TALL: return con_font_set(vc, op); case KD_FONT_OP_GET: + case KD_FONT_OP_GET_TALL: return con_font_get(vc, op); case KD_FONT_OP_SET_DEFAULT: return con_font_default(vc, op); -- cgit v1.2.3 From 05e2600cb0a4d73b0779cf29512819616252aeeb Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Thu, 19 Jan 2023 16:19:17 +0100 Subject: VT: Bump font size limitation to 64x128 pixels This moves 32x32 font size limitation checking down to drivers, so that fbcon can allow large fonts. We still keep a limitation to 64x128 pixels so as to have a simple bounded allocation for con_font_get and in the userland kbd tool. That glyph size will however be enough to have 128x36 characters on a "16/9 8K display". Signed-off-by: Samuel Thibault Link: https://lore.kernel.org/r/20230119151935.112415738@ens-lyon.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 8da7ab34b8fd..57a5c23b51d4 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -4523,17 +4523,20 @@ void reset_palette(struct vc_data *vc) /* * Font switching * - * Currently we only support fonts up to 32 pixels wide, at a maximum height - * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, - * depending on width) reserved for each character which is kinda wasty, but - * this is done in order to maintain compatibility with the EGA/VGA fonts. It - * is up to the actual low-level console-driver convert data into its favorite - * format (maybe we should add a `fontoffset' field to the `display' - * structure so we won't have to convert the fontdata all the time. + * Currently we only support fonts up to 128 pixels wide, at a maximum height + * of 128 pixels. Userspace fontdata may have to be stored with 32 bytes + * (shorts/ints, depending on width) reserved for each character which is + * kinda wasty, but this is done in order to maintain compatibility with the + * EGA/VGA fonts. It is up to the actual low-level console-driver convert data + * into its favorite format (maybe we should add a `fontoffset' field to the + * `display' structure so we won't have to convert the fontdata all the time. * /Jes */ -#define max_font_size 65536 +#define max_font_width 64 +#define max_font_height 128 +#define max_font_glyphs 512 +#define max_font_size (max_font_glyphs*max_font_width*max_font_height) static int con_font_get(struct vc_data *vc, struct console_font_op *op) { @@ -4543,7 +4546,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) unsigned int vpitch = op->op == KD_FONT_OP_GET_TALL ? op->height : 32; if (op->data) { - font.data = kmalloc(max_font_size, GFP_KERNEL); + font.data = kvmalloc(max_font_size, GFP_KERNEL); if (!font.data) return -ENOMEM; } else @@ -4578,7 +4581,7 @@ static int con_font_get(struct vc_data *vc, struct console_font_op *op) rc = -EFAULT; out: - kfree(font.data); + kvfree(font.data); return rc; } @@ -4593,9 +4596,10 @@ static int con_font_set(struct vc_data *vc, struct console_font_op *op) return -EINVAL; if (!op->data) return -EINVAL; - if (op->charcount > 512) + if (op->charcount > max_font_glyphs) return -EINVAL; - if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32) + if (op->width <= 0 || op->width > max_font_width || !op->height || + op->height > max_font_height) return -EINVAL; if (vpitch < op->height) return -EINVAL; -- cgit v1.2.3 From a3cf6b946e7eddaab7a2c2f61caf9c1763dcbed7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Mon, 23 Jan 2023 19:38:56 +0200 Subject: serial: qcom_geni: Fix variable naming MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit 2aaa43c70778 ("tty: serial: qcom-geni-serial: add support for serial engine DMA") renamed rx_fifo member to rf_buf which caused a build failure when b8caf69a6946 ("tty: serial: qcom-geni-serial: fix slab-out-of-bounds on RX FIFO buffer") from tty-linus was merged into tty-next. Fix the member variable name. Fixes: 7a6aa989f2e8 ("Merge 6.2-rc5 into tty-next") Reported-by: Stephen Rothwell Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230123173857.40695-2-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index d98e0a8aae7c..7c49194ec8ac 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -1055,11 +1055,11 @@ static int setup_fifos(struct qcom_geni_serial_port *port) uport->fifosize = (port->tx_fifo_depth * port->tx_fifo_width) / BITS_PER_BYTE; - if (port->rx_fifo && (old_rx_fifo_depth != port->rx_fifo_depth) && port->rx_fifo_depth) { - port->rx_fifo = devm_krealloc(uport->dev, port->rx_fifo, - port->rx_fifo_depth * sizeof(u32), - GFP_KERNEL); - if (!port->rx_fifo) + if (port->rx_buf && (old_rx_fifo_depth != port->rx_fifo_depth) && port->rx_fifo_depth) { + port->rx_buf = devm_krealloc(uport->dev, port->rx_buf, + port->rx_fifo_depth * sizeof(u32), + GFP_KERNEL); + if (!port->rx_buf) return -ENOMEM; } -- cgit v1.2.3 From ed0400ad547c0b88d2f06ecf22a089eb2e84c9b7 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= Date: Mon, 23 Jan 2023 19:38:57 +0200 Subject: serial: liteuart: Correct error rollback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Goto to the correct rollback label instead of directly returning. Fixes: 5602cf99dcdc ("serial: liteuart: add IRQ support for the RX path") Reported-by: Stephen Rothwell Reported-by: kernel test robot Reported-by: Dan Carpenter Signed-off-by: Ilpo Järvinen Reviewed-by: Gabriel Somlo Link: https://lore.kernel.org/r/20230123173857.40695-3-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index ef557d59e4c8..192ad681de35 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -313,7 +313,7 @@ static int liteuart_probe(struct platform_device *pdev) ret = platform_get_irq_optional(pdev, 0); if (ret < 0 && ret != -ENXIO) - return ret; + goto err_erase_id; if (ret > 0) port->irq = ret; -- cgit v1.2.3 From 8a79052c329ed7d738411286dba8c5896fa96140 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 13:41:07 +0800 Subject: tty: serial: fsl_lpuart: don't enable receiver/transmitter before rx/tx dma ready lpuart32_setup_watermark_enable() will configure the UART FIFO and watermark, also enable the receiver and transmitter, this should be done after the rx/tx dma steup ready. Also add lpuart32_hw_disable() to make sure the receiver/transmitter and interrupts are disabled during the dma steup. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130054107.9119-1-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 04fecff2fa5f..eac5243a9db0 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1702,6 +1702,16 @@ static int lpuart_startup(struct uart_port *port) return 0; } +static void lpuart32_hw_disable(struct lpuart_port *sport) +{ + unsigned long temp; + + temp = lpuart32_read(&sport->port, UARTCTRL); + temp &= ~(UARTCTRL_RIE | UARTCTRL_ILIE | UARTCTRL_RE | + UARTCTRL_TIE | UARTCTRL_TE); + lpuart32_write(&sport->port, temp, UARTCTRL); +} + static void lpuart32_configure(struct lpuart_port *sport) { unsigned long temp; @@ -1726,11 +1736,12 @@ static void lpuart32_hw_setup(struct lpuart_port *sport) spin_lock_irqsave(&sport->port.lock, flags); - lpuart32_setup_watermark_enable(sport); + lpuart32_hw_disable(sport); lpuart_rx_dma_startup(sport); lpuart_tx_dma_startup(sport); + lpuart32_setup_watermark_enable(sport); lpuart32_configure(sport); spin_unlock_irqrestore(&sport->port.lock, flags); -- cgit v1.2.3 From 34ebb26f12a84b744f43c5c4869516f122a2dfaa Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 14:44:44 +0800 Subject: tty: serial: fsl_lpuart: make rx_watermark configurable for different platforms Add rx_watermark parameter for struct lpuart_port to make the receive watermark configurable for different platforms. No function changed. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130064449.9564-2-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index eac5243a9db0..e4aa161e61bf 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -262,6 +262,7 @@ struct lpuart_port { unsigned int txfifo_size; unsigned int rxfifo_size; + u8 rx_watermark; bool lpuart_dma_tx_use; bool lpuart_dma_rx_use; struct dma_chan *dma_tx_chan; @@ -288,38 +289,45 @@ struct lpuart_soc_data { enum lpuart_type devtype; char iotype; u8 reg_off; + u8 rx_watermark; }; static const struct lpuart_soc_data vf_data = { .devtype = VF610_LPUART, .iotype = UPIO_MEM, + .rx_watermark = 1, }; static const struct lpuart_soc_data ls1021a_data = { .devtype = LS1021A_LPUART, .iotype = UPIO_MEM32BE, + .rx_watermark = 1, }; static const struct lpuart_soc_data ls1028a_data = { .devtype = LS1028A_LPUART, .iotype = UPIO_MEM32, + .rx_watermark = 1, }; static struct lpuart_soc_data imx7ulp_data = { .devtype = IMX7ULP_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, + .rx_watermark = 1, }; static struct lpuart_soc_data imx8qxp_data = { .devtype = IMX8QXP_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, + .rx_watermark = 1, }; static struct lpuart_soc_data imxrt1050_data = { .devtype = IMXRT1050_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, + .rx_watermark = 1, }; static const struct of_device_id lpuart_dt_ids[] = { @@ -1520,7 +1528,7 @@ static void lpuart_setup_watermark(struct lpuart_port *sport) } writeb(0, sport->port.membase + UARTTWFIFO); - writeb(1, sport->port.membase + UARTRWFIFO); + writeb(sport->rx_watermark, sport->port.membase + UARTRWFIFO); /* Restore cr2 */ writeb(cr2_saved, sport->port.membase + UARTCR2); @@ -1555,7 +1563,8 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport) lpuart32_write(&sport->port, val, UARTFIFO); /* set the watermark */ - val = (0x1 << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF); + val = (sport->rx_watermark << UARTWATER_RXWATER_OFF) | + (0x0 << UARTWATER_TXWATER_OFF); lpuart32_write(&sport->port, val, UARTWATER); /* Restore cr2 */ @@ -2731,6 +2740,7 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.dev = &pdev->dev; sport->port.type = PORT_LPUART; sport->devtype = sdata->devtype; + sport->rx_watermark = sdata->rx_watermark; ret = platform_get_irq(pdev, 0); if (ret < 0) return ret; -- cgit v1.2.3 From 7c0105901778500f6d11ddfd99f6efa1987c37a6 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 14:44:45 +0800 Subject: tty: serial: fsl_lpuart: set receive watermark for imx8qxp platform Since imx8qxp RX FIFO depth is 64 datawords, it will be better to set the rx watermark as 31, which means when the number of datawords in the receive FIFO(>= 32) is greater than the watermark, an interrupt or a DMA request is generated. Also keep the console rx watermark as 1 to make sure it responsive. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130064449.9564-3-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index e4aa161e61bf..868c2783d2c7 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -321,7 +321,7 @@ static struct lpuart_soc_data imx8qxp_data = { .devtype = IMX8QXP_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, - .rx_watermark = 1, + .rx_watermark = 31, }; static struct lpuart_soc_data imxrt1050_data = { .devtype = IMXRT1050_LPUART, @@ -1527,6 +1527,8 @@ static void lpuart_setup_watermark(struct lpuart_port *sport) writeb(UARTSFIFO_RXUF, sport->port.membase + UARTSFIFO); } + if (uart_console(&sport->port)) + sport->rx_watermark = 1; writeb(0, sport->port.membase + UARTTWFIFO); writeb(sport->rx_watermark, sport->port.membase + UARTRWFIFO); @@ -1563,6 +1565,8 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport) lpuart32_write(&sport->port, val, UARTFIFO); /* set the watermark */ + if (uart_console(&sport->port)) + sport->rx_watermark = 1; val = (sport->rx_watermark << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF); lpuart32_write(&sport->port, val, UARTWATER); -- cgit v1.2.3 From 9ad9df8447547febe9dd09b040f4528a09e495f0 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 14:44:46 +0800 Subject: tty: serial: fsl_lpuart: Fix the wrong RXWATER setting for rx dma case The RXWATER value must be greater than 0 according to the LPUART reference manual. And when the number of datawords in the receive FIFO is greater than RXWATER, an interrupt or a DMA request is generated, so no need to set the different value for lpuart interrupt case and dma case. Here delete the wrong RXWATER setting for dma case directly. Fixes: 42b68768e51b ("serial: fsl_lpuart: DMA support for 32-bit variant") Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130064449.9564-4-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 868c2783d2c7..ba6ade784ac5 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1729,12 +1729,6 @@ static void lpuart32_configure(struct lpuart_port *sport) { unsigned long temp; - if (sport->lpuart_dma_rx_use) { - /* RXWATER must be 0 */ - temp = lpuart32_read(&sport->port, UARTWATER); - temp &= ~(UARTWATER_WATER_MASK << UARTWATER_RXWATER_OFF); - lpuart32_write(&sport->port, temp, UARTWATER); - } temp = lpuart32_read(&sport->port, UARTCTRL); if (!sport->lpuart_dma_rx_use) temp |= UARTCTRL_RIE | UARTCTRL_ILIE; -- cgit v1.2.3 From 96f54fd4894711b0dce6a1c8c26c882295dc9234 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 14:44:47 +0800 Subject: tty: serial: fsl_lpuart: Enable Receiver Idle Empty function for LPUART With the growth of rx watermark, it's useful to enable the Receiver Idle Empty function, it can assert the RDRF(Receive Data Register Full Flag) when the receiver is idle for a number of idle characters and the FIFO is not empty. It will generate a DMA request or interrupt, which can avoid receive data being trapped in the RX FIFO since the number of words received is less than the watermark. Here set the RXIDEN as 0x3 which enable the RDRF assertion due to partially filled FIFO when receiver is idle for 4 characters. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130064449.9564-5-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index ba6ade784ac5..2789749d3d0d 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -214,6 +214,7 @@ #define UARTFIFO_RXUF 0x00010000 #define UARTFIFO_TXFLUSH 0x00008000 #define UARTFIFO_RXFLUSH 0x00004000 +#define UARTFIFO_RXIDEN GENMASK(12, 10) #define UARTFIFO_TXOFE 0x00000200 #define UARTFIFO_RXUFE 0x00000100 #define UARTFIFO_TXFE 0x00000080 @@ -1562,6 +1563,7 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport) val = lpuart32_read(&sport->port, UARTFIFO); val |= UARTFIFO_TXFE | UARTFIFO_RXFE; val |= UARTFIFO_TXFLUSH | UARTFIFO_RXFLUSH; + val |= FIELD_PREP(UARTFIFO_RXIDEN, 0x3); lpuart32_write(&sport->port, val, UARTFIFO); /* set the watermark */ -- cgit v1.2.3 From ecba98f9ddf426af337fb8b63d7581c254fe6e87 Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 14:44:48 +0800 Subject: tty: serial: fsl_lpuart: set RTS watermark for lpuart Add RTS watermark support for LPUART. The RX RTS_B output negates when the number of empty words in the receive FIFO is greater or equal to RTSWATER. Here set the RTSWATER to half of the rxfifo_size. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130064449.9564-6-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 2789749d3d0d..c35e49a09bcc 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -201,6 +201,7 @@ #define UARTDATA_MASK 0x3ff #define UARTMODIR_IREN 0x00020000 +#define UARTMODIR_RTSWATER GENMASK(10, 8) #define UARTMODIR_TXCTSSRC 0x00000020 #define UARTMODIR_TXCTSC 0x00000010 #define UARTMODIR_RXRTSE 0x00000008 @@ -1573,6 +1574,13 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport) (0x0 << UARTWATER_TXWATER_OFF); lpuart32_write(&sport->port, val, UARTWATER); + /* set RTS watermark */ + if (!uart_console(&sport->port)) { + val = lpuart32_read(&sport->port, UARTMODIR); + val |= FIELD_PREP(UARTMODIR_RTSWATER, sport->rxfifo_size >> 1); + lpuart32_write(&sport->port, val, UARTMODIR); + } + /* Restore cr2 */ lpuart32_write(&sport->port, ctrl_saved, UARTCTRL); } -- cgit v1.2.3 From ed35d9dc3a80f874b511c2dd6fea7112a779dacc Mon Sep 17 00:00:00 2001 From: Sherry Sun Date: Mon, 30 Jan 2023 14:44:49 +0800 Subject: tty: serial: fsl_lpuart: add imx8ulp support The lpuart of imx8ulp is basically the same as imx7ulp, but it supports some new features based on imx7ulp, such as it can assert the DMA request on EOP(end-of-packet). Here add lpuart support for imx8ulp, and rx_watermark is set to 3 as imx8ulp RX FIFO depth is 8. Signed-off-by: Sherry Sun Link: https://lore.kernel.org/r/20230130064449.9564-7-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index c35e49a09bcc..644827e97cb0 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -252,6 +252,7 @@ enum lpuart_type { LS1021A_LPUART, LS1028A_LPUART, IMX7ULP_LPUART, + IMX8ULP_LPUART, IMX8QXP_LPUART, IMXRT1050_LPUART, }; @@ -319,6 +320,13 @@ static struct lpuart_soc_data imx7ulp_data = { .rx_watermark = 1, }; +static struct lpuart_soc_data imx8ulp_data = { + .devtype = IMX8ULP_LPUART, + .iotype = UPIO_MEM32, + .reg_off = IMX_REG_OFF, + .rx_watermark = 3, +}; + static struct lpuart_soc_data imx8qxp_data = { .devtype = IMX8QXP_LPUART, .iotype = UPIO_MEM32, @@ -337,6 +345,7 @@ static const struct of_device_id lpuart_dt_ids[] = { { .compatible = "fsl,ls1021a-lpuart", .data = &ls1021a_data, }, { .compatible = "fsl,ls1028a-lpuart", .data = &ls1028a_data, }, { .compatible = "fsl,imx7ulp-lpuart", .data = &imx7ulp_data, }, + { .compatible = "fsl,imx8ulp-lpuart", .data = &imx8ulp_data, }, { .compatible = "fsl,imx8qxp-lpuart", .data = &imx8qxp_data, }, { .compatible = "fsl,imxrt1050-lpuart", .data = &imxrt1050_data}, { /* sentinel */ } @@ -357,6 +366,11 @@ static inline bool is_imx7ulp_lpuart(struct lpuart_port *sport) return sport->devtype == IMX7ULP_LPUART; } +static inline bool is_imx8ulp_lpuart(struct lpuart_port *sport) +{ + return sport->devtype == IMX8ULP_LPUART; +} + static inline bool is_imx8qxp_lpuart(struct lpuart_port *sport) { return sport->devtype == IMX8QXP_LPUART; @@ -2691,7 +2705,7 @@ static int lpuart_global_reset(struct lpuart_port *sport) return ret; } - if (is_imx7ulp_lpuart(sport) || is_imx8qxp_lpuart(sport)) { + if (is_imx7ulp_lpuart(sport) || is_imx8ulp_lpuart(sport) || is_imx8qxp_lpuart(sport)) { /* * If the transmitter is used by earlycon, wait for transmit engine to * complete and then reset. -- cgit v1.2.3 From 297cb3f0b94bfedd781426814f1798a5c5658050 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 23 Jan 2023 21:17:41 +0200 Subject: serial: liteuart: Don't mix devm_*() with non-devm_*() calls In the probe we need to call all devm_*() first followed by non-devm_*() calls. This is due to reversed clean up that may happen in a wrong order otherwise. The driver currently allocates xarray before calling devm_platform_get_and_ioremap_resource(). While it's not an issue in this certain case, it's still better to be pedantic. Signed-off-by: Andy Shevchenko Reviewed-by: Gabriel Somlo Link: https://lore.kernel.org/r/20230123191741.79751-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 192ad681de35..562892395570 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -286,37 +286,35 @@ static int liteuart_probe(struct platform_device *pdev) struct xa_limit limit; int dev_id, ret; - /* look for aliases; auto-enumerate for free index if not found */ - dev_id = of_alias_get_id(pdev->dev.of_node, "serial"); - if (dev_id < 0) - limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS); - else - limit = XA_LIMIT(dev_id, dev_id); - uart = devm_kzalloc(&pdev->dev, sizeof(struct liteuart_port), GFP_KERNEL); if (!uart) return -ENOMEM; - ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL); - if (ret) - return ret; - - uart->id = dev_id; port = &uart->port; /* get membase */ port->membase = devm_platform_get_and_ioremap_resource(pdev, 0, NULL); - if (IS_ERR(port->membase)) { - ret = PTR_ERR(port->membase); - goto err_erase_id; - } + if (IS_ERR(port->membase)) + return PTR_ERR(port->membase); ret = platform_get_irq_optional(pdev, 0); if (ret < 0 && ret != -ENXIO) - goto err_erase_id; + return ret; if (ret > 0) port->irq = ret; + /* look for aliases; auto-enumerate for free index if not found */ + dev_id = of_alias_get_id(pdev->dev.of_node, "serial"); + if (dev_id < 0) + limit = XA_LIMIT(0, CONFIG_SERIAL_LITEUART_MAX_PORTS); + else + limit = XA_LIMIT(dev_id, dev_id); + + ret = xa_alloc(&liteuart_array, &dev_id, uart, limit, GFP_KERNEL); + if (ret) + return ret; + + uart->id = dev_id; /* values not from device tree */ port->dev = &pdev->dev; port->iotype = UPIO_MEM; -- cgit v1.2.3 From 646b4cd9909aaf2bfb9e05897e9c3871a7385219 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 23 Jan 2023 21:26:04 +0200 Subject: serial: liteuart: Remove a copy of UART id in private structure The struct liteuart_port keeps tracking of UART ID which is also saved in the struct uart_port as line member. Drop the former one and use the latter everywhere. Signed-off-by: Andy Shevchenko Reviewed-by: Gabriel Somlo Link: https://lore.kernel.org/r/20230123192604.81452-1-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/liteuart.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/liteuart.c b/drivers/tty/serial/liteuart.c index 562892395570..80de3a42b67b 100644 --- a/drivers/tty/serial/liteuart.c +++ b/drivers/tty/serial/liteuart.c @@ -46,7 +46,6 @@ struct liteuart_port { struct uart_port port; struct timer_list timer; - u32 id; u8 irq_reg; }; @@ -314,7 +313,6 @@ static int liteuart_probe(struct platform_device *pdev) if (ret) return ret; - uart->id = dev_id; /* values not from device tree */ port->dev = &pdev->dev; port->iotype = UPIO_MEM; @@ -334,7 +332,7 @@ static int liteuart_probe(struct platform_device *pdev) return 0; err_erase_id: - xa_erase(&liteuart_array, uart->id); + xa_erase(&liteuart_array, dev_id); return ret; } @@ -342,10 +340,10 @@ err_erase_id: static int liteuart_remove(struct platform_device *pdev) { struct uart_port *port = platform_get_drvdata(pdev); - struct liteuart_port *uart = to_liteuart_port(port); + unsigned int line = port->line; uart_remove_one_port(&liteuart_driver, port); - xa_erase(&liteuart_array, uart->id); + xa_erase(&liteuart_array, line); return 0; } -- cgit v1.2.3 From 6a9a733edd46732e906d976dc21a42dd361e53cc Mon Sep 17 00:00:00 2001 From: Brian King Date: Wed, 1 Feb 2023 13:57:38 -0600 Subject: hvcs: Fix hvcs port reference counting The hvcs driver only ever gets two references to the port. One at initialization time, and one at install time. Remove the code that was trying to do multiple port puts for each open, which would result in more puts than gets. Signed-off-by: Brian King Link: https://lore.kernel.org/r/20230201195743.303163-2-brking@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 18 ------------------ 1 file changed, 18 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 4ba24963685e..faf5ccfc561e 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -1215,12 +1215,9 @@ static void hvcs_hangup(struct tty_struct * tty) { struct hvcs_struct *hvcsd = tty->driver_data; unsigned long flags; - int temp_open_count; int irq; spin_lock_irqsave(&hvcsd->lock, flags); - /* Preserve this so that we know how many kref refs to put */ - temp_open_count = hvcsd->port.count; /* * Don't kref put inside the spinlock because the destruction @@ -1247,21 +1244,6 @@ static void hvcs_hangup(struct tty_struct * tty) spin_unlock_irqrestore(&hvcsd->lock, flags); free_irq(irq, hvcsd); - - /* - * We need to kref_put() for every open_count we have since the - * tty_hangup() function doesn't invoke a close per open connection on a - * non-console device. - */ - while(temp_open_count) { - --temp_open_count; - /* - * The final put will trigger destruction of the hvcs_struct. - * NOTE: If this hangup was signaled from user space then the - * final put will never happen. - */ - tty_port_put(&hvcsd->port); - } } /* -- cgit v1.2.3 From fbe7e38f3e57e38916ae7f248fd6efafeb9ecdd3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Thu, 2 Feb 2023 11:45:01 +0100 Subject: serial: 8250: Fix mismerge regarding serial_lsr_in() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The relevant history introducing serial_lsr_in() looks as follows: $ git log --graph --oneline --boundary 9fafe733514b..df36f3e3fbb7 -- drivers/tty/serial/8250/8250_port.c * df36f3e3fbb7 Merge tag 'v5.19-rc3' into tty-next |\ | * be03b0651ffd serial: 8250: Store to lsr_save_flags after lsr read * | ... * | bdb70c424df1 serial: 8250: Create serial_lsr_in() * | ce338e4477cf serial: 8250: Store to lsr_save_flags after lsr read * | ... |/ o 9fafe733514b tty: remove CMSPAR ifdefs So the patch "serial: 8250: Store to lsr_save_flags after lsr read" was introduced twice and in one branch it was followed up by commit bdb70c424df1 ("serial: 8250: Create serial_lsr_in()") which moved explicit lsr_saved_flags handling into a new function serial_lsr_in(). When the two branches were merged in commit df36f3e3fbb7, we got both, serial_lsr_in() and the explicit lsr_saved_flags handling. So drop the explicit lsr_saved_flags handling. Signed-off-by: Uwe Kleine-König Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230202104501.264686-1-u.kleine-koenig@pengutronix.de Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_port.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index 33be7aad11ef..e61753c295d5 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -1512,8 +1512,6 @@ static inline void __stop_tx(struct uart_8250_port *p) u16 lsr = serial_lsr_in(p); u64 stop_delay = 0; - p->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS; - if (!(lsr & UART_LSR_THRE)) return; /* -- cgit v1.2.3 From 3957b9501a5a8fa709ae4a47483714491471f6db Mon Sep 17 00:00:00 2001 From: Shenwei Wang Date: Tue, 7 Feb 2023 10:24:20 -0600 Subject: serial: fsl_lpuart: fix RS485 RTS polariy inverse issue The previous 'commit 846651eca073 ("serial: fsl_lpuart: RS485 RTS polariy is inverse")' only fixed the inverse issue on lpuart 8bit platforms. This is a follow-up patch to fix the RS485 polarity inverse issue on lpuart 32bit platforms. Fixes: 03895cf41d18 ("tty: serial: fsl_lpuart: Add support for RS-485") Reported-by: Sherry Sun Signed-off-by: Shenwei Wang Link: https://lore.kernel.org/r/20230207162420.3647904-1-shenwei.wang@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/fsl_lpuart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index 644827e97cb0..e945f41b93d4 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -1413,9 +1413,9 @@ static int lpuart32_config_rs485(struct uart_port *port, struct ktermios *termio * Note: UART is assumed to be active high. */ if (rs485->flags & SER_RS485_RTS_ON_SEND) - modem &= ~UARTMODEM_TXRTSPOL; - else if (rs485->flags & SER_RS485_RTS_AFTER_SEND) modem |= UARTMODEM_TXRTSPOL; + else if (rs485->flags & SER_RS485_RTS_AFTER_SEND) + modem &= ~UARTMODEM_TXRTSPOL; } lpuart32_write(&sport->port, modem, UARTMODIR); -- cgit v1.2.3 From ef25e16ea9674b713a68c3bda821556ce9901254 Mon Sep 17 00:00:00 2001 From: Peng Fan Date: Mon, 6 Feb 2023 09:30:16 +0800 Subject: tty: serial: imx: disable Ageing Timer interrupt request irq There maybe pending USR interrupt before requesting irq, however uart_add_one_port has not executed, so there will be kernel panic: [ 0.795668] Unable to handle kernel NULL pointer dereference at virtual addre ss 0000000000000080 [ 0.802701] Mem abort info: [ 0.805367] ESR = 0x0000000096000004 [ 0.808950] EC = 0x25: DABT (current EL), IL = 32 bits [ 0.814033] SET = 0, FnV = 0 [ 0.816950] EA = 0, S1PTW = 0 [ 0.819950] FSC = 0x04: level 0 translation fault [ 0.824617] Data abort info: [ 0.827367] ISV = 0, ISS = 0x00000004 [ 0.831033] CM = 0, WnR = 0 [ 0.833866] [0000000000000080] user address but active_mm is swapper [ 0.839951] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP [ 0.845953] Modules linked in: [ 0.848869] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.1.1+g56321e101aca #1 [ 0.855617] Hardware name: Freescale i.MX8MP EVK (DT) [ 0.860452] pstate: 000000c5 (nzcv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 0.867117] pc : __imx_uart_rxint.constprop.0+0x11c/0x2c0 [ 0.872283] lr : imx_uart_int+0xf8/0x1ec The issue only happends in the inmate linux when Jailhouse hypervisor enabled. The test procedure is: while true; do jailhouse enable imx8mp.cell jailhouse cell linux xxxx sleep 10 jailhouse cell destroy 1 jailhouse disable sleep 5 done And during the upper test, press keys to the 2nd linux console. When `jailhouse cell destroy 1`, the 2nd linux has no chance to put the uart to a quiese state, so USR1/2 may has pending interrupts. Then when `jailhosue cell linux xx` to start 2nd linux again, the issue trigger. In order to disable irqs before requesting them, both UCR1 and UCR2 irqs should be disabled, so here fix that, disable the Ageing Timer interrupt in UCR2 as UCR1 does. Fixes: 8a61f0c70ae6 ("serial: imx: Disable irqs before requesting them") Suggested-by: Sherry Sun Reviewed-by: Sherry Sun Signed-off-by: Peng Fan Acked-by: Jason Liu Link: https://lore.kernel.org/r/20230206013016.29352-1-sherry.sun@nxp.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index ae75135dccb8..0e0590d1b123 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -2381,6 +2381,11 @@ static int imx_uart_probe(struct platform_device *pdev) ucr1 &= ~(UCR1_ADEN | UCR1_TRDYEN | UCR1_IDEN | UCR1_RRDYEN | UCR1_RTSDEN); imx_uart_writel(sport, ucr1, UCR1); + /* Disable Ageing Timer interrupt */ + ucr2 = imx_uart_readl(sport, UCR2); + ucr2 &= ~UCR2_ATEN; + imx_uart_writel(sport, ucr2, UCR2); + /* * In case RS485 is enabled without GPIO RTS control, the UART IP * is used to control CTS signal. Keep both the UART and Receiver -- cgit v1.2.3 From 760aa5e81f33e0da82512c4288489739a6d1c556 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 3 Feb 2023 09:57:58 -0600 Subject: hvcs: Use dev_groups to manage hvcs device attributes Use the dev_groups functionality to manage the attribute groups for hvcs devices. This simplifies the code and also eliminates errors coming from kernfs when attempting to remove a console device that is in use. Signed-off-by: Brian King Link: https://lore.kernel.org/r/20230203155802.404324-2-brking@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index faf5ccfc561e..0416601357e1 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -432,7 +432,7 @@ static ssize_t hvcs_index_show(struct device *dev, struct device_attribute *attr static DEVICE_ATTR(index, S_IRUGO, hvcs_index_show, NULL); -static struct attribute *hvcs_attrs[] = { +static struct attribute *hvcs_dev_attrs[] = { &dev_attr_partner_vtys.attr, &dev_attr_partner_clcs.attr, &dev_attr_current_vty.attr, @@ -441,9 +441,7 @@ static struct attribute *hvcs_attrs[] = { NULL, }; -static struct attribute_group hvcs_attr_group = { - .attrs = hvcs_attrs, -}; +ATTRIBUTE_GROUPS(hvcs_dev); static ssize_t rescan_show(struct device_driver *ddp, char *buf) { @@ -688,8 +686,6 @@ static void hvcs_destruct_port(struct tty_port *p) spin_unlock_irqrestore(&hvcsd->lock, flags); spin_unlock(&hvcs_structs_lock); - sysfs_remove_group(&vdev->dev.kobj, &hvcs_attr_group); - kfree(hvcsd); } @@ -721,7 +717,6 @@ static int hvcs_probe( { struct hvcs_struct *hvcsd; int index, rc; - int retval; if (!dev || !id) { printk(KERN_ERR "HVCS: probed with invalid parameter.\n"); @@ -778,13 +773,6 @@ static int hvcs_probe( list_add_tail(&(hvcsd->next), &hvcs_structs); spin_unlock(&hvcs_structs_lock); - retval = sysfs_create_group(&dev->dev.kobj, &hvcs_attr_group); - if (retval) { - printk(KERN_ERR "HVCS: Can't create sysfs attrs for vty-server@%X\n", - hvcsd->vdev->unit_address); - return retval; - } - printk(KERN_INFO "HVCS: vty-server@%X added to the vio bus.\n", dev->unit_address); /* @@ -831,6 +819,9 @@ static struct vio_driver hvcs_vio_driver = { .probe = hvcs_probe, .remove = hvcs_remove, .name = hvcs_driver_name, + .driver = { + .dev_groups = hvcs_dev_groups, + }, }; /* Only called from hvcs_get_pi please */ -- cgit v1.2.3 From 503a90dd619d52dcac2cc68bd742aa914c7cd47a Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 3 Feb 2023 09:57:59 -0600 Subject: hvcs: Use driver groups to manage driver attributes Rather than manually creating attributes for the hvcs driver, let the driver core do this for us. This also fixes some hotplug remove issues and ensures that cleanup of these attributes is done in the right order. Signed-off-by: Brian King Link: https://lore.kernel.org/r/20230203155802.404324-3-brking@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 0416601357e1..522910716025 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -466,6 +466,13 @@ static ssize_t rescan_store(struct device_driver *ddp, const char * buf, static DRIVER_ATTR_RW(rescan); +static struct attribute *hvcs_attrs[] = { + &driver_attr_rescan.attr, + NULL, +}; + +ATTRIBUTE_GROUPS(hvcs); + static void hvcs_kick(void) { hvcs_kicked = 1; @@ -820,6 +827,7 @@ static struct vio_driver hvcs_vio_driver = { .remove = hvcs_remove, .name = hvcs_driver_name, .driver = { + .groups = hvcs_groups, .dev_groups = hvcs_dev_groups, }, }; @@ -1498,13 +1506,6 @@ static int __init hvcs_module_init(void) pr_info("HVCS: Driver registered.\n"); - /* This needs to be done AFTER the vio_register_driver() call or else - * the kobjects won't be initialized properly. - */ - rc = driver_create_file(&(hvcs_vio_driver.driver), &driver_attr_rescan); - if (rc) - pr_warn("HVCS: Failed to create rescan file (err %d)\n", rc); - return 0; } @@ -1529,8 +1530,6 @@ static void __exit hvcs_module_exit(void) hvcs_pi_buff = NULL; spin_unlock(&hvcs_pi_lock); - driver_remove_file(&hvcs_vio_driver.driver, &driver_attr_rescan); - tty_unregister_driver(hvcs_tty_driver); hvcs_free_index_list(); -- cgit v1.2.3 From 3a8d3b366ce47024bf274eac783f8af5df2780f5 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 3 Feb 2023 09:58:00 -0600 Subject: hvcs: Get reference to tty in remove Grab a reference to the tty when removing the hvcs to ensure it does not get freed unexpectedly. Signed-off-by: Brian King Link: https://lore.kernel.org/r/20230203155802.404324-4-brking@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 522910716025..8d40b20de277 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -799,7 +799,7 @@ static void hvcs_remove(struct vio_dev *dev) spin_lock_irqsave(&hvcsd->lock, flags); - tty = hvcsd->port.tty; + tty = tty_port_tty_get(&hvcsd->port); spin_unlock_irqrestore(&hvcsd->lock, flags); @@ -814,8 +814,10 @@ static void hvcs_remove(struct vio_dev *dev) * hvcs_hangup. The tty should always be valid at this time unless a * simultaneous tty close already cleaned up the hvcs_struct. */ - if (tty) + if (tty) { tty_hangup(tty); + tty_kref_put(tty); + } printk(KERN_INFO "HVCS: vty-server@%X removed from the" " vio bus.\n", dev->unit_address); -- cgit v1.2.3 From d432228bc7b1b3f0ed06510278ff5a77b3749fe6 Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 3 Feb 2023 09:58:01 -0600 Subject: hvcs: Use vhangup in hotplug remove When hotplug removing an hvcs device, we need to ensure the hangup processing is done prior to exiting the remove function, so use tty_vhangup to do the hangup processing directly rather than using tty_hangup which simply schedules the hangup work for later execution. Signed-off-by: Brian King Link: https://lore.kernel.org/r/20230203155802.404324-5-brking@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 8d40b20de277..ecf24195b1e9 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -810,12 +810,11 @@ static void hvcs_remove(struct vio_dev *dev) tty_port_put(&hvcsd->port); /* - * The hangup is a scheduled function which will auto chain call - * hvcs_hangup. The tty should always be valid at this time unless a + * The tty should always be valid at this time unless a * simultaneous tty close already cleaned up the hvcs_struct. */ if (tty) { - tty_hangup(tty); + tty_vhangup(tty); tty_kref_put(tty); } -- cgit v1.2.3 From 28d49f8cbe9c7966f91ee1b5ec2f997f6e55bf9f Mon Sep 17 00:00:00 2001 From: Brian King Date: Fri, 3 Feb 2023 09:58:02 -0600 Subject: hvcs: Synchronize hotplug remove with port free Synchronizes hotplug remove with the freeing of the port. This ensures we have freed all the memory associated with this port and are not leaking memory. Signed-off-by: Brian King Link: https://lore.kernel.org/r/20230203155802.404324-6-brking@linux.vnet.ibm.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 26 +++++++++++++++----------- 1 file changed, 15 insertions(+), 11 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index ecf24195b1e9..1de1a09bf82d 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -52,6 +52,7 @@ #include #include +#include #include #include #include @@ -285,6 +286,7 @@ struct hvcs_struct { char p_location_code[HVCS_CLC_LENGTH + 1]; /* CLC + Null Term */ struct list_head next; /* list management */ struct vio_dev *vdev; + struct completion *destroyed; }; static LIST_HEAD(hvcs_structs); @@ -663,11 +665,13 @@ static void hvcs_destruct_port(struct tty_port *p) { struct hvcs_struct *hvcsd = container_of(p, struct hvcs_struct, port); struct vio_dev *vdev; + struct completion *comp; unsigned long flags; spin_lock(&hvcs_structs_lock); spin_lock_irqsave(&hvcsd->lock, flags); + comp = hvcsd->destroyed; /* the list_del poisons the pointers */ list_del(&(hvcsd->next)); @@ -687,6 +691,7 @@ static void hvcs_destruct_port(struct tty_port *p) hvcsd->p_unit_address = 0; hvcsd->p_partition_ID = 0; + hvcsd->destroyed = NULL; hvcs_return_index(hvcsd->index); memset(&hvcsd->p_location_code[0], 0x00, HVCS_CLC_LENGTH + 1); @@ -694,6 +699,8 @@ static void hvcs_destruct_port(struct tty_port *p) spin_unlock(&hvcs_structs_lock); kfree(hvcsd); + if (comp) + complete(comp); } static const struct tty_port_operations hvcs_port_ops = { @@ -792,6 +799,7 @@ static int hvcs_probe( static void hvcs_remove(struct vio_dev *dev) { struct hvcs_struct *hvcsd = dev_get_drvdata(&dev->dev); + DECLARE_COMPLETION_ONSTACK(comp); unsigned long flags; struct tty_struct *tty; @@ -799,16 +807,11 @@ static void hvcs_remove(struct vio_dev *dev) spin_lock_irqsave(&hvcsd->lock, flags); + hvcsd->destroyed = ∁ tty = tty_port_tty_get(&hvcsd->port); spin_unlock_irqrestore(&hvcsd->lock, flags); - /* - * Let the last holder of this object cause it to be removed, which - * would probably be tty_hangup below. - */ - tty_port_put(&hvcsd->port); - /* * The tty should always be valid at this time unless a * simultaneous tty close already cleaned up the hvcs_struct. @@ -818,6 +821,8 @@ static void hvcs_remove(struct vio_dev *dev) tty_kref_put(tty); } + tty_port_put(&hvcsd->port); + wait_for_completion(&comp); printk(KERN_INFO "HVCS: vty-server@%X removed from the" " vio bus.\n", dev->unit_address); }; @@ -1171,7 +1176,10 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) hvcsd = tty->driver_data; spin_lock_irqsave(&hvcsd->lock, flags); - if (--hvcsd->port.count == 0) { + if (hvcsd->port.count == 0) { + spin_unlock_irqrestore(&hvcsd->lock, flags); + return; + } else if (--hvcsd->port.count == 0) { vio_disable_interrupts(hvcsd->vdev); @@ -1227,11 +1235,7 @@ static void hvcs_hangup(struct tty_struct * tty) vio_disable_interrupts(hvcsd->vdev); hvcsd->todo_mask = 0; - - /* I don't think the tty needs the hvcs_struct pointer after a hangup */ - tty->driver_data = NULL; hvcsd->port.tty = NULL; - hvcsd->port.count = 0; /* This will drop any buffered data on the floor which is OK in a hangup -- cgit v1.2.3 From 04a189c720aa2b6091442113ce9b9bc93552dff8 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 2 Feb 2023 15:12:21 +0100 Subject: tty: pcn_uart: fix memory leak with using debugfs_lookup() When calling debugfs_lookup() the result must have dput() called on it, otherwise the memory will leak over time. To make things simpler, just call debugfs_lookup_and_remove() instead which handles all of the logic at once. Cc: Jiri Slaby Link: https://lore.kernel.org/r/20230202141221.2293012-1-gregkh@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 9576ba8bbc40..cc83b772b7ca 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1775,7 +1775,7 @@ static void pch_uart_exit_port(struct eg20t_port *priv) char name[32]; snprintf(name, sizeof(name), "uart%d_regs", priv->port.line); - debugfs_remove(debugfs_lookup(name, NULL)); + debugfs_lookup_and_remove(name, NULL); uart_remove_one_port(&pch_uart_driver, &priv->port); free_page((unsigned long)priv->rxbuf.buf); } -- cgit v1.2.3 From 0348386dab3711b8caa0422c2a4852913b8bf4d7 Mon Sep 17 00:00:00 2001 From: Kumaravel Thiagarajan Date: Tue, 7 Feb 2023 22:18:11 +0530 Subject: serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Move implementation of setup_port func() to serial8250_pci_setup_port. Co-developed-by: Tharun Kumar P Signed-off-by: Tharun Kumar P Signed-off-by: Kumaravel Thiagarajan Reviewed-by: Ilpo Järvinen Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20230207164814.3104605-2-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 25 +++------------------- drivers/tty/serial/8250/8250_pcilib.c | 40 +++++++++++++++++++++++++++++++++++ drivers/tty/serial/8250/8250_pcilib.h | 15 +++++++++++++ drivers/tty/serial/8250/Kconfig | 4 ++++ drivers/tty/serial/8250/Makefile | 1 + 5 files changed, 63 insertions(+), 22 deletions(-) create mode 100644 drivers/tty/serial/8250/8250_pcilib.c create mode 100644 drivers/tty/serial/8250/8250_pcilib.h (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 8e9f247590bd..c55be6fda0ca 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -24,6 +24,7 @@ #include #include "8250.h" +#include "8250_pcilib.h" /* * init function returns: @@ -89,28 +90,7 @@ static int setup_port(struct serial_private *priv, struct uart_8250_port *port, u8 bar, unsigned int offset, int regshift) { - struct pci_dev *dev = priv->dev; - - if (bar >= PCI_STD_NUM_BARS) - return -EINVAL; - - if (pci_resource_flags(dev, bar) & IORESOURCE_MEM) { - if (!pcim_iomap(dev, bar, 0) && !pcim_iomap_table(dev)) - return -ENOMEM; - - port->port.iotype = UPIO_MEM; - port->port.iobase = 0; - port->port.mapbase = pci_resource_start(dev, bar) + offset; - port->port.membase = pcim_iomap_table(dev)[bar] + offset; - port->port.regshift = regshift; - } else { - port->port.iotype = UPIO_PORT; - port->port.iobase = pci_resource_start(dev, bar) + offset; - port->port.mapbase = 0; - port->port.membase = NULL; - port->port.regshift = 0; - } - return 0; + return serial8250_pci_setup_port(priv->dev, port, bar, offset, regshift); } /* @@ -5757,3 +5737,4 @@ module_pci_driver(serial_pci_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Generic 8250/16x50 PCI serial probe module"); MODULE_DEVICE_TABLE(pci, serial_pci_tbl); +MODULE_IMPORT_NS(SERIAL_8250_PCI); diff --git a/drivers/tty/serial/8250/8250_pcilib.c b/drivers/tty/serial/8250/8250_pcilib.c new file mode 100644 index 000000000000..d234e9194feb --- /dev/null +++ b/drivers/tty/serial/8250/8250_pcilib.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * 8250 PCI library. + * + * Copyright (C) 2001 Russell King, All Rights Reserved. + */ +#include +#include +#include +#include + +#include "8250.h" +#include "8250_pcilib.h" + +int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, + u8 bar, unsigned int offset, int regshift) +{ + if (bar >= PCI_STD_NUM_BARS) + return -EINVAL; + + if (pci_resource_flags(dev, bar) & IORESOURCE_MEM) { + if (!pcim_iomap(dev, bar, 0) && !pcim_iomap_table(dev)) + return -ENOMEM; + + port->port.iotype = UPIO_MEM; + port->port.iobase = 0; + port->port.mapbase = pci_resource_start(dev, bar) + offset; + port->port.membase = pcim_iomap_table(dev)[bar] + offset; + port->port.regshift = regshift; + } else { + port->port.iotype = UPIO_PORT; + port->port.iobase = pci_resource_start(dev, bar) + offset; + port->port.mapbase = 0; + port->port.membase = NULL; + port->port.regshift = 0; + } + return 0; +} +EXPORT_SYMBOL_NS_GPL(serial8250_pci_setup_port, SERIAL_8250_PCI); +MODULE_LICENSE("GPL"); diff --git a/drivers/tty/serial/8250/8250_pcilib.h b/drivers/tty/serial/8250/8250_pcilib.h new file mode 100644 index 000000000000..1aaf1b50ce9c --- /dev/null +++ b/drivers/tty/serial/8250/8250_pcilib.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 8250 PCI library header file. + * + * Copyright (C) 2001 Russell King, All Rights Reserved. + */ + +#include + +struct pci_dev; + +struct uart_8250_port; + +int serial8250_pci_setup_port(struct pci_dev *dev, struct uart_8250_port *port, u8 bar, + unsigned int offset, int regshift); diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 020ef532940d..9b3ba28cc562 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -129,9 +129,13 @@ config SERIAL_8250_DMA This builds DMA support that can be used with 8250/16650 compatible UART controllers that support DMA signaling. +config SERIAL_8250_PCILIB + bool + config SERIAL_8250_PCI tristate "8250/16550 PCI device support" depends on SERIAL_8250 && PCI + select SERIAL_8250_PCILIB default SERIAL_8250 help This builds standard PCI serial support. You may be able to diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index 4e1a32812683..ce63a250da3b 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_SERIAL_8250) += 8250.o 8250_base.o 8250_base-$(CONFIG_SERIAL_8250_DMA) += 8250_dma.o 8250_base-$(CONFIG_SERIAL_8250_DWLIB) += 8250_dwlib.o 8250_base-$(CONFIG_SERIAL_8250_FINTEK) += 8250_fintek.o +8250_base-$(CONFIG_SERIAL_8250_PCILIB) += 8250_pcilib.o obj-$(CONFIG_SERIAL_8250_PARISC) += 8250_parisc.o obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o obj-$(CONFIG_SERIAL_8250_EXAR) += 8250_exar.o -- cgit v1.2.3 From 32bb477fa7bf386ce87837691c4672854a5231e4 Mon Sep 17 00:00:00 2001 From: Kumaravel Thiagarajan Date: Tue, 7 Feb 2023 22:18:12 +0530 Subject: serial: 8250_pci1xxxx: Add driver for quad-uart support pci1xxxx is a PCIe switch with a multi-function endpoint on one of its downstream ports. Quad-uart is one of the functions in the multi-function endpoint. This driver loads for the quad-uart and enumerates single or multiple instances of uart based on the PCIe subsystem device ID. Co-developed-by: Tharun Kumar P Signed-off-by: Tharun Kumar P Signed-off-by: Kumaravel Thiagarajan Reviewed-by: Andy Shevchenko Link: https://lore.kernel.org/r/20230207164814.3104605-3-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci1xxxx.c | 329 ++++++++++++++++++++++++++++++++ drivers/tty/serial/8250/8250_port.c | 8 + drivers/tty/serial/8250/Kconfig | 11 ++ drivers/tty/serial/8250/Makefile | 1 + 4 files changed, 349 insertions(+) create mode 100644 drivers/tty/serial/8250/8250_pci1xxxx.c (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci1xxxx.c b/drivers/tty/serial/8250/8250_pci1xxxx.c new file mode 100644 index 000000000000..ea04c014edb9 --- /dev/null +++ b/drivers/tty/serial/8250/8250_pci1xxxx.c @@ -0,0 +1,329 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Probe module for 8250/16550-type MCHP PCI serial ports. + * + * Based on drivers/tty/serial/8250/8250_pci.c, + * + * Copyright (C) 2022 Microchip Technology Inc., All Rights Reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "8250.h" +#include "8250_pcilib.h" + +#define PCI_DEVICE_ID_EFAR_PCI12000 0xa002 +#define PCI_DEVICE_ID_EFAR_PCI11010 0xa012 +#define PCI_DEVICE_ID_EFAR_PCI11101 0xa022 +#define PCI_DEVICE_ID_EFAR_PCI11400 0xa032 +#define PCI_DEVICE_ID_EFAR_PCI11414 0xa042 + +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_4p 0x0001 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p012 0x0002 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p013 0x0003 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p023 0x0004 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p123 0x0005 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p01 0x0006 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p02 0x0007 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p03 0x0008 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p12 0x0009 +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p13 0x000a +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p23 0x000b +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p0 0x000c +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p1 0x000d +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p2 0x000e +#define PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p3 0x000f + +#define PCI_SUBDEVICE_ID_EFAR_PCI12000 PCI_DEVICE_ID_EFAR_PCI12000 +#define PCI_SUBDEVICE_ID_EFAR_PCI11010 PCI_DEVICE_ID_EFAR_PCI11010 +#define PCI_SUBDEVICE_ID_EFAR_PCI11101 PCI_DEVICE_ID_EFAR_PCI11101 +#define PCI_SUBDEVICE_ID_EFAR_PCI11400 PCI_DEVICE_ID_EFAR_PCI11400 +#define PCI_SUBDEVICE_ID_EFAR_PCI11414 PCI_DEVICE_ID_EFAR_PCI11414 + +#define UART_ACTV_REG 0x11 +#define UART_BLOCK_SET_ACTIVE BIT(0) + +#define UART_PCI_CTRL_REG 0x80 +#define UART_PCI_CTRL_SET_MULTIPLE_MSI BIT(4) +#define UART_PCI_CTRL_D3_CLK_ENABLE BIT(0) + +#define ADCL_CFG_REG 0x40 +#define ADCL_CFG_POL_SEL BIT(2) +#define ADCL_CFG_PIN_SEL BIT(1) +#define ADCL_CFG_EN BIT(0) + +#define UART_BIT_SAMPLE_CNT 16 +#define BAUD_CLOCK_DIV_INT_MSK GENMASK(31, 8) +#define ADCL_CFG_RTS_DELAY_MASK GENMASK(11, 8) +#define UART_CLOCK_DEFAULT (62500 * HZ_PER_KHZ) + +#define UART_WAKE_REG 0x8C +#define UART_WAKE_MASK_REG 0x90 +#define UART_WAKE_N_PIN BIT(2) +#define UART_WAKE_NCTS BIT(1) +#define UART_WAKE_INT BIT(0) +#define UART_WAKE_SRCS \ + (UART_WAKE_N_PIN | UART_WAKE_NCTS | UART_WAKE_INT) + +#define UART_BAUD_CLK_DIVISOR_REG 0x54 + +#define UART_RESET_REG 0x94 +#define UART_RESET_D3_RESET_DISABLE BIT(16) + +#define MAX_PORTS 4 +#define PORT_OFFSET 0x100 + +static const int logical_to_physical_port_idx[][MAX_PORTS] = { + {0, 1, 2, 3}, /* PCI12000, PCI11010, PCI11101, PCI11400, PCI11414 */ + {0, 1, 2, 3}, /* PCI4p */ + {0, 1, 2, -1}, /* PCI3p012 */ + {0, 1, 3, -1}, /* PCI3p013 */ + {0, 2, 3, -1}, /* PCI3p023 */ + {1, 2, 3, -1}, /* PCI3p123 */ + {0, 1, -1, -1}, /* PCI2p01 */ + {0, 2, -1, -1}, /* PCI2p02 */ + {0, 3, -1, -1}, /* PCI2p03 */ + {1, 2, -1, -1}, /* PCI2p12 */ + {1, 3, -1, -1}, /* PCI2p13 */ + {2, 3, -1, -1}, /* PCI2p23 */ + {0, -1, -1, -1}, /* PCI1p0 */ + {1, -1, -1, -1}, /* PCI1p1 */ + {2, -1, -1, -1}, /* PCI1p2 */ + {3, -1, -1, -1}, /* PCI1p3 */ +}; + +struct pci1xxxx_8250 { + unsigned int nr; + void __iomem *membase; + int line[]; +}; + +static int pci1xxxx_get_num_ports(struct pci_dev *dev) +{ + switch (dev->subsystem_device) { + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p0: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p1: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p2: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p3: + case PCI_SUBDEVICE_ID_EFAR_PCI12000: + case PCI_SUBDEVICE_ID_EFAR_PCI11010: + case PCI_SUBDEVICE_ID_EFAR_PCI11101: + case PCI_SUBDEVICE_ID_EFAR_PCI11400: + default: + return 1; + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p01: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p02: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p03: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p12: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p13: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_2p23: + return 2; + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p012: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p123: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p013: + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_3p023: + return 3; + case PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_4p: + case PCI_SUBDEVICE_ID_EFAR_PCI11414: + return 4; + } +} + +static unsigned int pci1xxxx_get_divisor(struct uart_port *port, + unsigned int baud, unsigned int *frac) +{ + unsigned int quot; + + /* + * Calculate baud rate sampling period in nanoseconds. + * Fractional part x denotes x/255 parts of a nanosecond. + */ + quot = NSEC_PER_SEC / (baud * UART_BIT_SAMPLE_CNT); + *frac = (NSEC_PER_SEC - quot * baud * UART_BIT_SAMPLE_CNT) * + 255 / UART_BIT_SAMPLE_CNT / baud; + + return quot; +} + +static void pci1xxxx_set_divisor(struct uart_port *port, unsigned int baud, + unsigned int quot, unsigned int frac) +{ + writel(FIELD_PREP(BAUD_CLOCK_DIV_INT_MSK, quot) | frac, + port->membase + UART_BAUD_CLK_DIVISOR_REG); +} + +static int pci1xxxx_setup(struct pci_dev *pdev, + struct uart_8250_port *port, int port_idx) +{ + int ret; + + port->port.flags |= UPF_FIXED_TYPE | UPF_SKIP_TEST; + port->port.type = PORT_MCHP16550A; + port->port.set_termios = serial8250_do_set_termios; + port->port.get_divisor = pci1xxxx_get_divisor; + port->port.set_divisor = pci1xxxx_set_divisor; + + ret = serial8250_pci_setup_port(pdev, port, 0, PORT_OFFSET * port_idx, 0); + if (ret < 0) + return ret; + + writeb(UART_BLOCK_SET_ACTIVE, port->port.membase + UART_ACTV_REG); + writeb(UART_WAKE_SRCS, port->port.membase + UART_WAKE_REG); + writeb(UART_WAKE_N_PIN, port->port.membase + UART_WAKE_MASK_REG); + + return 0; +} + +static unsigned int pci1xxxx_get_max_port(int subsys_dev) +{ + unsigned int i = MAX_PORTS; + + if (subsys_dev < ARRAY_SIZE(logical_to_physical_port_idx)) + while (i--) { + if (logical_to_physical_port_idx[subsys_dev][i] != -1) + return logical_to_physical_port_idx[subsys_dev][i] + 1; + } + + if (subsys_dev == PCI_SUBDEVICE_ID_EFAR_PCI11414) + return 4; + + return 1; +} + +static int pci1xxxx_logical_to_physical_port_translate(int subsys_dev, int port) +{ + if (subsys_dev < ARRAY_SIZE(logical_to_physical_port_idx)) + return logical_to_physical_port_idx[subsys_dev][port]; + + return logical_to_physical_port_idx[0][port]; +} + +static int pci1xxxx_serial_probe(struct pci_dev *pdev, + const struct pci_device_id *id) +{ + struct device *dev = &pdev->dev; + struct pci1xxxx_8250 *priv; + struct uart_8250_port uart; + unsigned int max_vec_reqd; + unsigned int nr_ports, i; + int num_vectors; + int subsys_dev; + int port_idx; + int rc; + + rc = pcim_enable_device(pdev); + if (rc) + return rc; + + nr_ports = pci1xxxx_get_num_ports(pdev); + + priv = devm_kzalloc(dev, struct_size(priv, line, nr_ports), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->membase = pci_ioremap_bar(pdev, 0); + if (!priv->membase) + return -ENOMEM; + + pci_set_master(pdev); + + priv->nr = nr_ports; + + subsys_dev = pdev->subsystem_device; + max_vec_reqd = pci1xxxx_get_max_port(subsys_dev); + + num_vectors = pci_alloc_irq_vectors(pdev, 1, max_vec_reqd, PCI_IRQ_ALL_TYPES); + if (num_vectors < 0) { + pci_iounmap(pdev, priv->membase); + return num_vectors; + } + + memset(&uart, 0, sizeof(uart)); + uart.port.flags = UPF_SHARE_IRQ | UPF_FIXED_PORT; + uart.port.uartclk = UART_CLOCK_DEFAULT; + uart.port.dev = dev; + + if (num_vectors == max_vec_reqd) + writeb(UART_PCI_CTRL_SET_MULTIPLE_MSI, priv->membase + UART_PCI_CTRL_REG); + + for (i = 0; i < nr_ports; i++) { + priv->line[i] = -ENODEV; + + port_idx = pci1xxxx_logical_to_physical_port_translate(subsys_dev, i); + + if (num_vectors == max_vec_reqd) + uart.port.irq = pci_irq_vector(pdev, port_idx); + else + uart.port.irq = pci_irq_vector(pdev, 0); + + rc = pci1xxxx_setup(pdev, &uart, port_idx); + if (rc) { + dev_warn(dev, "Failed to setup port %u\n", i); + continue; + } + + priv->line[i] = serial8250_register_8250_port(&uart); + if (priv->line[i] < 0) { + dev_warn(dev, + "Couldn't register serial port %lx, irq %d, type %d, error %d\n", + uart.port.iobase, uart.port.irq, uart.port.iotype, + priv->line[i]); + } + } + + pci_set_drvdata(pdev, priv); + + return 0; +} + +static void pci1xxxx_serial_remove(struct pci_dev *dev) +{ + struct pci1xxxx_8250 *priv = pci_get_drvdata(dev); + unsigned int i; + + for (i = 0; i < priv->nr; i++) { + if (priv->line[i] >= 0) + serial8250_unregister_port(priv->line[i]); + } + + pci_free_irq_vectors(dev); + pci_iounmap(dev, priv->membase); +} + +static const struct pci_device_id pci1xxxx_pci_tbl[] = { + { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI11010) }, + { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI11101) }, + { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI11400) }, + { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI11414) }, + { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI12000) }, + {} +}; +MODULE_DEVICE_TABLE(pci, pci1xxxx_pci_tbl); + +static struct pci_driver pci1xxxx_pci_driver = { + .name = "pci1xxxx serial", + .probe = pci1xxxx_serial_probe, + .remove = pci1xxxx_serial_remove, + .id_table = pci1xxxx_pci_tbl, +}; +module_pci_driver(pci1xxxx_pci_driver); + +static_assert((ARRAY_SIZE(logical_to_physical_port_idx) == PCI_SUBDEVICE_ID_EFAR_PCI1XXXX_1p3 + 1)); + +MODULE_IMPORT_NS(SERIAL_8250_PCI); +MODULE_DESCRIPTION("Microchip Technology Inc. PCIe to UART module"); +MODULE_AUTHOR("Kumaravel Thiagarajan "); +MODULE_AUTHOR("Tharun Kumar P "); +MODULE_LICENSE("GPL"); diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index e61753c295d5..fa43df05342b 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -313,6 +313,14 @@ static const struct serial8250_config uart_config[] = { .rxtrig_bytes = {1, 4, 8, 14}, .flags = UART_CAP_FIFO, }, + [PORT_MCHP16550A] = { + .name = "MCHP16550A", + .fifo_size = 256, + .tx_loadsz = 256, + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01, + .rxtrig_bytes = {2, 66, 130, 194}, + .flags = UART_CAP_FIFO, + }, }; /* Uart divisor latch read */ diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index 9b3ba28cc562..978dc196c29b 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -295,6 +295,17 @@ config SERIAL_8250_HUB6 To compile this driver as a module, choose M here: the module will be called 8250_hub6. +config SERIAL_8250_PCI1XXXX + tristate "Microchip 8250 based serial port" + depends on SERIAL_8250 && PCI + select SERIAL_8250_PCILIB + default SERIAL_8250 + help + Select this option if you have a setup with Microchip PCIe + Switch with serial port enabled and wish to enable 8250 + serial driver for the serial interface. This driver support + will ensure to support baud rates upto 1.5Mpbs. + # # Misc. options/drivers. # diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index ce63a250da3b..4fc2fc1f41b6 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -27,6 +27,7 @@ obj-$(CONFIG_SERIAL_8250_ACCENT) += 8250_accent.o obj-$(CONFIG_SERIAL_8250_BOCA) += 8250_boca.o obj-$(CONFIG_SERIAL_8250_EXAR_ST16C554) += 8250_exar_st16c554.o obj-$(CONFIG_SERIAL_8250_HUB6) += 8250_hub6.o +obj-$(CONFIG_SERIAL_8250_PCI1XXXX) += 8250_pci1xxxx.o obj-$(CONFIG_SERIAL_8250_FSL) += 8250_fsl.o obj-$(CONFIG_SERIAL_8250_MEN_MCB) += 8250_men_mcb.o obj-$(CONFIG_SERIAL_8250_DFL) += 8250_dfl.o -- cgit v1.2.3 From 08cedda0b3852c0f47a94e64eb586b5507d797f1 Mon Sep 17 00:00:00 2001 From: Kumaravel Thiagarajan Date: Tue, 7 Feb 2023 22:18:13 +0530 Subject: serial: 8250_pci1xxxx: Add RS485 support to quad-uart driver MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit pci1xxxx uart supports RS485 mode of operation in the hardware with auto-direction control with configurable delay for releasing RTS after the transmission. This patch adds support for the RS485 mode. Co-developed-by: Tharun Kumar P Signed-off-by: Tharun Kumar P Signed-off-by: Kumaravel Thiagarajan Reviewed-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20230207164814.3104605-4-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci1xxxx.c | 50 +++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci1xxxx.c b/drivers/tty/serial/8250/8250_pci1xxxx.c index ea04c014edb9..58f47d18f7d8 100644 --- a/drivers/tty/serial/8250/8250_pci1xxxx.c +++ b/drivers/tty/serial/8250/8250_pci1xxxx.c @@ -164,6 +164,54 @@ static void pci1xxxx_set_divisor(struct uart_port *port, unsigned int baud, port->membase + UART_BAUD_CLK_DIVISOR_REG); } +static int pci1xxxx_rs485_config(struct uart_port *port, + struct ktermios *termios, + struct serial_rs485 *rs485) +{ + u32 delay_in_baud_periods; + u32 baud_period_in_ns; + u32 mode_cfg = 0; + u32 clock_div; + + /* + * pci1xxxx's uart hardware supports only RTS delay after + * Tx and in units of bit times to a maximum of 15 + */ + if (rs485->flags & SER_RS485_ENABLED) { + mode_cfg = ADCL_CFG_EN | ADCL_CFG_PIN_SEL; + + if (!(rs485->flags & SER_RS485_RTS_ON_SEND)) + mode_cfg |= ADCL_CFG_POL_SEL; + + if (rs485->delay_rts_after_send) { + clock_div = readl(port->membase + UART_BAUD_CLK_DIVISOR_REG); + baud_period_in_ns = + FIELD_GET(BAUD_CLOCK_DIV_INT_MSK, clock_div) * + UART_BIT_SAMPLE_CNT; + delay_in_baud_periods = + rs485->delay_rts_after_send * NSEC_PER_MSEC / + baud_period_in_ns; + delay_in_baud_periods = + min_t(u32, delay_in_baud_periods, + FIELD_MAX(ADCL_CFG_RTS_DELAY_MASK)); + mode_cfg |= FIELD_PREP(ADCL_CFG_RTS_DELAY_MASK, + delay_in_baud_periods); + rs485->delay_rts_after_send = + baud_period_in_ns * delay_in_baud_periods / + NSEC_PER_MSEC; + } + } + writel(mode_cfg, port->membase + ADCL_CFG_REG); + return 0; +} + +static const struct serial_rs485 pci1xxxx_rs485_supported = { + .flags = SER_RS485_ENABLED | SER_RS485_RTS_ON_SEND | + SER_RS485_RTS_AFTER_SEND, + .delay_rts_after_send = 1, + /* Delay RTS before send is not supported */ +}; + static int pci1xxxx_setup(struct pci_dev *pdev, struct uart_8250_port *port, int port_idx) { @@ -174,6 +222,8 @@ static int pci1xxxx_setup(struct pci_dev *pdev, port->port.set_termios = serial8250_do_set_termios; port->port.get_divisor = pci1xxxx_get_divisor; port->port.set_divisor = pci1xxxx_set_divisor; + port->port.rs485_config = pci1xxxx_rs485_config; + port->port.rs485_supported = pci1xxxx_rs485_supported; ret = serial8250_pci_setup_port(pdev, port, 0, PORT_OFFSET * port_idx, 0); if (ret < 0) -- cgit v1.2.3 From 8cf31a99d3a53a68f7032452cb7de3203b8200c8 Mon Sep 17 00:00:00 2001 From: Kumaravel Thiagarajan Date: Tue, 7 Feb 2023 22:18:14 +0530 Subject: serial: 8250_pci1xxxx: Add power management functions to quad-uart driver pci1xxxx's quad-uart function has the capability to wake up UART from suspend state. Enable wakeup before entering into suspend and disable wakeup on resume. Co-developed-by: Tharun Kumar P Signed-off-by: Tharun Kumar P Signed-off-by: Kumaravel Thiagarajan Link: https://lore.kernel.org/r/20230207164814.3104605-5-kumaravel.thiagarajan@microchip.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci1xxxx.c | 115 ++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/8250/8250_pci1xxxx.c b/drivers/tty/serial/8250/8250_pci1xxxx.c index 58f47d18f7d8..a3b25779d921 100644 --- a/drivers/tty/serial/8250/8250_pci1xxxx.c +++ b/drivers/tty/serial/8250/8250_pci1xxxx.c @@ -212,6 +212,116 @@ static const struct serial_rs485 pci1xxxx_rs485_supported = { /* Delay RTS before send is not supported */ }; +static bool pci1xxxx_port_suspend(int line) +{ + struct uart_8250_port *up = serial8250_get_port(line); + struct uart_port *port = &up->port; + struct tty_port *tport = &port->state->port; + unsigned long flags; + bool ret = false; + u8 wakeup_mask; + + mutex_lock(&tport->mutex); + if (port->suspended == 0 && port->dev) { + wakeup_mask = readb(up->port.membase + UART_WAKE_MASK_REG); + + spin_lock_irqsave(&port->lock, flags); + port->mctrl &= ~TIOCM_OUT2; + port->ops->set_mctrl(port, port->mctrl); + spin_unlock_irqrestore(&port->lock, flags); + + ret = (wakeup_mask & UART_WAKE_SRCS) != UART_WAKE_SRCS; + } + + writeb(UART_WAKE_SRCS, port->membase + UART_WAKE_REG); + mutex_unlock(&tport->mutex); + + return ret; +} + +static void pci1xxxx_port_resume(int line) +{ + struct uart_8250_port *up = serial8250_get_port(line); + struct uart_port *port = &up->port; + struct tty_port *tport = &port->state->port; + unsigned long flags; + + mutex_lock(&tport->mutex); + writeb(UART_BLOCK_SET_ACTIVE, port->membase + UART_ACTV_REG); + writeb(UART_WAKE_SRCS, port->membase + UART_WAKE_REG); + + if (port->suspended == 0) { + spin_lock_irqsave(&port->lock, flags); + port->mctrl |= TIOCM_OUT2; + port->ops->set_mctrl(port, port->mctrl); + spin_unlock_irqrestore(&port->lock, flags); + } + mutex_unlock(&tport->mutex); +} + +static int pci1xxxx_suspend(struct device *dev) +{ + struct pci1xxxx_8250 *priv = dev_get_drvdata(dev); + struct pci_dev *pcidev = to_pci_dev(dev); + bool wakeup = false; + unsigned int data; + void __iomem *p; + int i; + + for (i = 0; i < priv->nr; i++) { + if (priv->line[i] >= 0) { + serial8250_suspend_port(priv->line[i]); + wakeup |= pci1xxxx_port_suspend(priv->line[i]); + } + } + + p = pci_ioremap_bar(pcidev, 0); + if (!p) { + dev_err(dev, "remapping of bar 0 memory failed"); + return -ENOMEM; + } + + data = readl(p + UART_RESET_REG); + writel(data | UART_RESET_D3_RESET_DISABLE, p + UART_RESET_REG); + + if (wakeup) + writeb(UART_PCI_CTRL_D3_CLK_ENABLE, p + UART_PCI_CTRL_REG); + + iounmap(p); + device_set_wakeup_enable(dev, true); + pci_wake_from_d3(pcidev, true); + + return 0; +} + +static int pci1xxxx_resume(struct device *dev) +{ + struct pci1xxxx_8250 *priv = dev_get_drvdata(dev); + struct pci_dev *pcidev = to_pci_dev(dev); + unsigned int data; + void __iomem *p; + int i; + + p = pci_ioremap_bar(pcidev, 0); + if (!p) { + dev_err(dev, "remapping of bar 0 memory failed"); + return -ENOMEM; + } + + data = readl(p + UART_RESET_REG); + writel(data & ~UART_RESET_D3_RESET_DISABLE, p + UART_RESET_REG); + iounmap(p); + + for (i = 0; i < priv->nr; i++) { + if (priv->line[i] >= 0) { + pci1xxxx_port_resume(priv->line[i]); + serial8250_resume_port(priv->line[i]); + } + } + + return 0; +} + static int pci1xxxx_setup(struct pci_dev *pdev, struct uart_8250_port *port, int port_idx) { @@ -352,6 +462,8 @@ static void pci1xxxx_serial_remove(struct pci_dev *dev) pci_iounmap(dev, priv->membase); } +static DEFINE_SIMPLE_DEV_PM_OPS(pci1xxxx_pm_ops, pci1xxxx_suspend, pci1xxxx_resume); + static const struct pci_device_id pci1xxxx_pci_tbl[] = { { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI11010) }, { PCI_VDEVICE(EFAR, PCI_DEVICE_ID_EFAR_PCI11101) }, @@ -366,6 +478,9 @@ static struct pci_driver pci1xxxx_pci_driver = { .name = "pci1xxxx serial", .probe = pci1xxxx_serial_probe, .remove = pci1xxxx_serial_remove, + .driver = { + .pm = pm_sleep_ptr(&pci1xxxx_pm_ops), + }, .id_table = pci1xxxx_pci_tbl, }; module_pci_driver(pci1xxxx_pci_driver); -- cgit v1.2.3 From d45fb2e430e54fac6af3cabb39c36171c4bf3f52 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:26:54 +0300 Subject: serial: imx: factor-out common code to imx_uart_soft_reset() We perform soft reset in 2 places, slightly differently for no sufficient reasons, so move more generic variant to a function, and re-use the code. Out of 2 repeat counters, 10 and 100, select 10, as the code works at interrupts disabled, and in practice the reset happens immediately. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-2-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 73 ++++++++++++++++++++++++------------------------ 1 file changed, 37 insertions(+), 36 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 0e0590d1b123..e7c88e7528d7 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -397,6 +397,39 @@ static void start_hrtimer_ms(struct hrtimer *hrt, unsigned long msec) hrtimer_start(hrt, ms_to_ktime(msec), HRTIMER_MODE_REL); } +/* called with port.lock taken and irqs off */ +static void imx_uart_soft_reset(struct imx_port *sport) +{ + int i = 10; + u32 ucr2, ubir, ubmr, uts; + + /* + * According to the Reference Manual description of the UART SRST bit: + * + * "Reset the transmit and receive state machines, + * all FIFOs and register USR1, USR2, UBIR, UBMR, UBRC, URXD, UTXD + * and UTS[6-3]". + * + * We don't need to restore the old values from USR1, USR2, URXD and + * UTXD. UBRC is read only, so only save/restore the other three + * registers. + */ + ubir = imx_uart_readl(sport, UBIR); + ubmr = imx_uart_readl(sport, UBMR); + uts = imx_uart_readl(sport, IMX21_UTS); + + ucr2 = imx_uart_readl(sport, UCR2); + imx_uart_writel(sport, ucr2 & ~UCR2_SRST, UCR2); + + while (!(imx_uart_readl(sport, UCR2) & UCR2_SRST) && (--i > 0)) + udelay(1); + + /* Restore the registers */ + imx_uart_writel(sport, ubir, UBIR); + imx_uart_writel(sport, ubmr, UBMR); + imx_uart_writel(sport, uts, IMX21_UTS); +} + /* called with port.lock taken and irqs off */ static void imx_uart_start_rx(struct uart_port *port) { @@ -1400,7 +1433,7 @@ static void imx_uart_disable_dma(struct imx_port *sport) static int imx_uart_startup(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; - int retval, i; + int retval; unsigned long flags; int dma_is_inited = 0; u32 ucr1, ucr2, ucr3, ucr4, uts; @@ -1432,15 +1465,9 @@ static int imx_uart_startup(struct uart_port *port) dma_is_inited = 1; spin_lock_irqsave(&sport->port.lock, flags); - /* Reset fifo's and state machines */ - i = 100; - ucr2 = imx_uart_readl(sport, UCR2); - ucr2 &= ~UCR2_SRST; - imx_uart_writel(sport, ucr2, UCR2); - - while (!(imx_uart_readl(sport, UCR2) & UCR2_SRST) && (--i > 0)) - udelay(1); + /* Reset fifo's and state machines */ + imx_uart_soft_reset(sport); /* * Finally, clear and enable interrupts @@ -1596,8 +1623,6 @@ static void imx_uart_flush_buffer(struct uart_port *port) { struct imx_port *sport = (struct imx_port *)port; struct scatterlist *sgl = &sport->tx_sgl[0]; - u32 ucr2; - int i = 100, ubir, ubmr, uts; if (!sport->dma_chan_tx) return; @@ -1615,32 +1640,8 @@ static void imx_uart_flush_buffer(struct uart_port *port) sport->dma_is_txing = 0; } - /* - * According to the Reference Manual description of the UART SRST bit: - * - * "Reset the transmit and receive state machines, - * all FIFOs and register USR1, USR2, UBIR, UBMR, UBRC, URXD, UTXD - * and UTS[6-3]". - * - * We don't need to restore the old values from USR1, USR2, URXD and - * UTXD. UBRC is read only, so only save/restore the other three - * registers. - */ - ubir = imx_uart_readl(sport, UBIR); - ubmr = imx_uart_readl(sport, UBMR); - uts = imx_uart_readl(sport, IMX21_UTS); - - ucr2 = imx_uart_readl(sport, UCR2); - ucr2 &= ~UCR2_SRST; - imx_uart_writel(sport, ucr2, UCR2); + imx_uart_soft_reset(sport); - while (!(imx_uart_readl(sport, UCR2) & UCR2_SRST) && (--i > 0)) - udelay(1); - - /* Restore the registers */ - imx_uart_writel(sport, ubir, UBIR); - imx_uart_writel(sport, ubmr, UBMR); - imx_uart_writel(sport, uts, IMX21_UTS); } static void -- cgit v1.2.3 From 496a4471b7c3ae5c0be1a3fccd69e7debc127e08 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:26:55 +0300 Subject: serial: imx: work-around for hardware RX flood Check if hardware Rx flood is in progress, and issue soft reset to UART to stop the flood. A way to reproduce the flood (checked on iMX6SX) is: open iMX UART at 9600 8N1, and from external source send 0xf0 char at 115200 8N1. In about 90% of cases this starts a flood of "receiving" of 0xff characters by the iMX UART that is terminated by any activity on RxD line, or could be stopped by issuing soft reset to the UART (just stop/start of RX does not help). Note that in essence what we did here is sending isolated start bit about 2.4 times shorter than it is to be if issued on the UART configured baud rate. There was earlier attempt to fix similar issue in: 'commit b38cb7d25711 ("serial: imx: Disable new features of autobaud detection")', but apparently it only gets harder to reproduce the issue after that commit. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-3-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 123 ++++++++++++++++++++++++++++++++++++----------- 1 file changed, 95 insertions(+), 28 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index e7c88e7528d7..2812222b53b7 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -210,6 +210,9 @@ struct imx_port { struct mctrl_gpios *gpios; + /* counter to stop 0xff flood */ + int idle_counter; + /* shadow registers */ unsigned int ucr1; unsigned int ucr2; @@ -428,6 +431,8 @@ static void imx_uart_soft_reset(struct imx_port *sport) imx_uart_writel(sport, ubir, UBIR); imx_uart_writel(sport, ubmr, UBMR); imx_uart_writel(sport, uts, IMX21_UTS); + + sport->idle_counter = 0; } /* called with port.lock taken and irqs off */ @@ -836,15 +841,66 @@ static irqreturn_t imx_uart_txint(int irq, void *dev_id) return IRQ_HANDLED; } +/* Check if hardware Rx flood is in progress, and issue soft reset to stop it. + * This is to be called from Rx ISRs only when some bytes were actually + * received. + * + * A way to reproduce the flood (checked on iMX6SX) is: open iMX UART at 9600 + * 8N1, and from external source send 0xf0 char at 115200 8N1. In about 90% of + * cases this starts a flood of "receiving" of 0xff characters by the iMX6 UART + * that is terminated by any activity on RxD line, or could be stopped by + * issuing soft reset to the UART (just stop/start of RX does not help). Note + * that what we do here is sending isolated start bit about 2.4 times shorter + * than it is to be on UART configured baud rate. + */ +static void imx_uart_check_flood(struct imx_port *sport, u32 usr2) +{ + /* To detect hardware 0xff flood we monitor RxD line between RX + * interrupts to isolate "receiving" of char(s) with no activity + * on RxD line, that'd never happen on actual data transfers. + * + * We use USR2_WAKE bit to check for activity on RxD line, but we have a + * race here if we clear USR2_WAKE when receiving of a char is in + * progress, so we might get RX interrupt later with USR2_WAKE bit + * cleared. Note though that as we don't try to clear USR2_WAKE when we + * detected no activity, this race may hide actual activity only once. + * + * Yet another case where receive interrupt may occur without RxD + * activity is expiration of aging timer, so we consider this as well. + * + * We use 'idle_counter' to ensure that we got at least so many RX + * interrupts without any detected activity on RxD line. 2 cases + * described plus 1 to be on the safe side gives us a margin of 3, + * below. In practice I was not able to produce a false positive to + * induce soft reset at regular data transfers even using 1 as the + * margin, so 3 is actually very strong. + * + * We count interrupts, not chars in 'idle-counter' for simplicity. + */ + + if (usr2 & USR2_WAKE) { + imx_uart_writel(sport, USR2_WAKE, USR2); + sport->idle_counter = 0; + } else if (++sport->idle_counter > 3) { + dev_warn(sport->port.dev, "RX flood detected: soft reset."); + imx_uart_soft_reset(sport); /* also clears 'sport->idle_counter' */ + } +} + static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) { struct imx_port *sport = dev_id; unsigned int rx, flg, ignored = 0; struct tty_port *port = &sport->port.state->port; + u32 usr2; + + usr2 = imx_uart_readl(sport, USR2); - while (imx_uart_readl(sport, USR2) & USR2_RDR) { - u32 usr2; + /* If we received something, check for 0xff flood */ + if (usr2 & USR2_RDR) + imx_uart_check_flood(sport, usr2); + for ( ; usr2 & USR2_RDR; usr2 = imx_uart_readl(sport, USR2)) { flg = TTY_NORMAL; sport->port.icount.rx++; @@ -1182,55 +1238,64 @@ static void imx_uart_dma_rx_callback(void *data) status = dmaengine_tx_status(chan, sport->rx_cookie, &state); if (status == DMA_ERROR) { + spin_lock(&sport->port.lock); imx_uart_clear_rx_errors(sport); + spin_unlock(&sport->port.lock); return; } - if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ)) { + /* + * The state-residue variable represents the empty space + * relative to the entire buffer. Taking this in consideration + * the head is always calculated base on the buffer total + * length - DMA transaction residue. The UART script from the + * SDMA firmware will jump to the next buffer descriptor, + * once a DMA transaction if finalized (IMX53 RM - A.4.1.2.4). + * Taking this in consideration the tail is always at the + * beginning of the buffer descriptor that contains the head. + */ - /* - * The state-residue variable represents the empty space - * relative to the entire buffer. Taking this in consideration - * the head is always calculated base on the buffer total - * length - DMA transaction residue. The UART script from the - * SDMA firmware will jump to the next buffer descriptor, - * once a DMA transaction if finalized (IMX53 RM - A.4.1.2.4). - * Taking this in consideration the tail is always at the - * beginning of the buffer descriptor that contains the head. - */ + /* Calculate the head */ + rx_ring->head = sg_dma_len(sgl) - state.residue; - /* Calculate the head */ - rx_ring->head = sg_dma_len(sgl) - state.residue; + /* Calculate the tail. */ + bd_size = sg_dma_len(sgl) / sport->rx_periods; + rx_ring->tail = ((rx_ring->head-1) / bd_size) * bd_size; - /* Calculate the tail. */ - bd_size = sg_dma_len(sgl) / sport->rx_periods; - rx_ring->tail = ((rx_ring->head-1) / bd_size) * bd_size; + if (rx_ring->head <= sg_dma_len(sgl) && + rx_ring->head > rx_ring->tail) { - if (rx_ring->head <= sg_dma_len(sgl) && - rx_ring->head > rx_ring->tail) { + /* Move data from tail to head */ + r_bytes = rx_ring->head - rx_ring->tail; - /* Move data from tail to head */ - r_bytes = rx_ring->head - rx_ring->tail; + /* If we received something, check for 0xff flood */ + if (r_bytes > 0) { + spin_lock(&sport->port.lock); + imx_uart_check_flood(sport, imx_uart_readl(sport, USR2)); + spin_unlock(&sport->port.lock); + } + + if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ)) { /* CPU claims ownership of RX DMA buffer */ dma_sync_sg_for_cpu(sport->port.dev, sgl, 1, - DMA_FROM_DEVICE); + DMA_FROM_DEVICE); w_bytes = tty_insert_flip_string(port, - sport->rx_buf + rx_ring->tail, r_bytes); + sport->rx_buf + rx_ring->tail, r_bytes); /* UART retrieves ownership of RX DMA buffer */ dma_sync_sg_for_device(sport->port.dev, sgl, 1, - DMA_FROM_DEVICE); + DMA_FROM_DEVICE); if (w_bytes != r_bytes) sport->port.icount.buf_overrun++; sport->port.icount.rx += w_bytes; - } else { - WARN_ON(rx_ring->head > sg_dma_len(sgl)); - WARN_ON(rx_ring->head <= rx_ring->tail); } + } else { + WARN_ON(rx_ring->head > sg_dma_len(sgl)); + WARN_ON(rx_ring->head <= rx_ring->tail); } if (w_bytes) { @@ -1306,6 +1371,8 @@ static void imx_uart_clear_rx_errors(struct imx_port *sport) imx_uart_writel(sport, USR2_ORE, USR2); } + sport->idle_counter = 0; + } #define TXTL_DEFAULT 2 /* reset default */ -- cgit v1.2.3 From e1c6a7e5f87d66fce5c6890845400f8425acda4f Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:26:56 +0300 Subject: serial: imx: do not sysrq broken chars Do not call uart_handle_sysrq_char() if we got any receive error along with the character, as we don't want random junk to be considered a sysrq. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-4-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 2812222b53b7..bd5d426c28fb 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -913,9 +913,6 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) continue; } - if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx)) - continue; - if (unlikely(rx & URXD_ERR)) { if (rx & URXD_BRK) sport->port.icount.brk++; @@ -944,6 +941,8 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) flg = TTY_OVERRUN; sport->port.sysrq = 0; + } else if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx)) { + continue; } if (sport->port.ignore_status_mask & URXD_DUMMY_READ) -- cgit v1.2.3 From fbf971701d03ede858f5ca8b8b8e328671ab04f4 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:26:57 +0300 Subject: serial: imx: do not break from FIFO reading loop prematurely There is no reason to prematurely break out of FIFO reading loop, and it might cause needless reenters into ISR, so keep reading until FIFO is empty. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-5-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index bd5d426c28fb..ef0b9d353617 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -890,7 +890,7 @@ static void imx_uart_check_flood(struct imx_port *sport, u32 usr2) static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) { struct imx_port *sport = dev_id; - unsigned int rx, flg, ignored = 0; + unsigned int rx, flg; struct tty_port *port = &sport->port.state->port; u32 usr2; @@ -923,11 +923,8 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) if (rx & URXD_OVRRUN) sport->port.icount.overrun++; - if (rx & sport->port.ignore_status_mask) { - if (++ignored > 100) - goto out; + if (rx & sport->port.ignore_status_mask) continue; - } rx &= (sport->port.read_status_mask | 0xFF); @@ -946,13 +943,12 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) } if (sport->port.ignore_status_mask & URXD_DUMMY_READ) - goto out; + continue; if (tty_insert_flip_char(port, rx, flg) == 0) sport->port.icount.buf_overrun++; } -out: tty_flip_buffer_push(port); return IRQ_HANDLED; -- cgit v1.2.3 From 0fbca4798af88c20a2b9e4c98ac762408a24b668 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:26:58 +0300 Subject: serial: imx: remove redundant USR2 read from FIFO reading loop There is no need to read USR2 twice at every loop iteration: get rid of the second read. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-6-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index ef0b9d353617..c578cdc6d8da 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -906,7 +906,6 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) rx = imx_uart_readl(sport, URXD0); - usr2 = imx_uart_readl(sport, USR2); if (usr2 & USR2_BRCD) { imx_uart_writel(sport, USR2_BRCD, USR2); if (uart_handle_break(&sport->port)) -- cgit v1.2.3 From 53701b6d2ce7202cff88943ee812917c896a8e90 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:26:59 +0300 Subject: serial: imx: stop using USR2 in FIFO reading loop The chip provides all the needed bits in the URXD0 register that we read anyway for data, so get rid of reading USR2 and use only URXD0 bits instead. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-7-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index c578cdc6d8da..a662f48a2146 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -894,27 +894,21 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) struct tty_port *port = &sport->port.state->port; u32 usr2; - usr2 = imx_uart_readl(sport, USR2); - /* If we received something, check for 0xff flood */ + usr2 = imx_uart_readl(sport, USR2); if (usr2 & USR2_RDR) imx_uart_check_flood(sport, usr2); - for ( ; usr2 & USR2_RDR; usr2 = imx_uart_readl(sport, USR2)) { + while ((rx = imx_uart_readl(sport, URXD0)) & URXD_CHARRDY) { flg = TTY_NORMAL; sport->port.icount.rx++; - rx = imx_uart_readl(sport, URXD0); - - if (usr2 & USR2_BRCD) { - imx_uart_writel(sport, USR2_BRCD, USR2); - if (uart_handle_break(&sport->port)) - continue; - } - if (unlikely(rx & URXD_ERR)) { - if (rx & URXD_BRK) + if (rx & URXD_BRK) { sport->port.icount.brk++; + if (uart_handle_break(&sport->port)) + continue; + } else if (rx & URXD_PRERR) sport->port.icount.parity++; else if (rx & URXD_FRMERR) -- cgit v1.2.3 From 2af4b918848b4102f0bf5761057e2506258e0bb8 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:27:00 +0300 Subject: serial: imx: refine local variables in rxint() The 'rx' is chip register, similar to 'usr2', so let it be of 'u32' type as well. Move 'flg' to be FIFO read loop local as it's not used outside. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201142700.4346-8-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index a662f48a2146..e2a89b920637 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -890,9 +890,8 @@ static void imx_uart_check_flood(struct imx_port *sport, u32 usr2) static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) { struct imx_port *sport = dev_id; - unsigned int rx, flg; struct tty_port *port = &sport->port.state->port; - u32 usr2; + u32 usr2, rx; /* If we received something, check for 0xff flood */ usr2 = imx_uart_readl(sport, USR2); @@ -900,7 +899,7 @@ static irqreturn_t __imx_uart_rxint(int irq, void *dev_id) imx_uart_check_flood(sport, usr2); while ((rx = imx_uart_readl(sport, URXD0)) & URXD_CHARRDY) { - flg = TTY_NORMAL; + unsigned int flg = TTY_NORMAL; sport->port.icount.rx++; if (unlikely(rx & URXD_ERR)) { -- cgit v1.2.3 From f2d9fbb6f4a7175ce41afe292d46685ef7752a67 Mon Sep 17 00:00:00 2001 From: Sergey Organov Date: Wed, 1 Feb 2023 17:16:03 +0300 Subject: serial: imx: get rid of registers shadowing Neither registers shadowing is functionally needed as all the registers are read-write, nor the shadowing makes much sense for speed-up, as most speed critical reads/writes (of data Rx/Tx registers) are not shadowed anyway. Moreover, the shadowing code is obviously pure overhead on the write path. Get rid of the shadowing code and variables due to above considerations. Signed-off-by: Sergey Organov Link: https://lore.kernel.org/r/20230201141603.4205-1-sorganov@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 67 +++--------------------------------------------- 1 file changed, 4 insertions(+), 63 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index e2a89b920637..363c77a140f0 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -213,13 +213,6 @@ struct imx_port { /* counter to stop 0xff flood */ int idle_counter; - /* shadow registers */ - unsigned int ucr1; - unsigned int ucr2; - unsigned int ucr3; - unsigned int ucr4; - unsigned int ufcr; - /* DMA fields */ unsigned int dma_is_enabled:1; unsigned int dma_is_rxing:1; @@ -276,59 +269,14 @@ static const struct of_device_id imx_uart_dt_ids[] = { }; MODULE_DEVICE_TABLE(of, imx_uart_dt_ids); -static void imx_uart_writel(struct imx_port *sport, u32 val, u32 offset) -{ - switch (offset) { - case UCR1: - sport->ucr1 = val; - break; - case UCR2: - sport->ucr2 = val; - break; - case UCR3: - sport->ucr3 = val; - break; - case UCR4: - sport->ucr4 = val; - break; - case UFCR: - sport->ufcr = val; - break; - default: - break; - } +static inline void imx_uart_writel(struct imx_port *sport, u32 val, u32 offset) +{ writel(val, sport->port.membase + offset); } -static u32 imx_uart_readl(struct imx_port *sport, u32 offset) +static inline u32 imx_uart_readl(struct imx_port *sport, u32 offset) { - switch (offset) { - case UCR1: - return sport->ucr1; - break; - case UCR2: - /* - * UCR2_SRST is the only bit in the cached registers that might - * differ from the value that was last written. As it only - * automatically becomes one after being cleared, reread - * conditionally. - */ - if (!(sport->ucr2 & UCR2_SRST)) - sport->ucr2 = readl(sport->port.membase + offset); - return sport->ucr2; - break; - case UCR3: - return sport->ucr3; - break; - case UCR4: - return sport->ucr4; - break; - case UFCR: - return sport->ufcr; - break; - default: - return readl(sport->port.membase + offset); - } + return readl(sport->port.membase + offset); } static inline unsigned imx_uart_uts_reg(struct imx_port *sport) @@ -2402,13 +2350,6 @@ static int imx_uart_probe(struct platform_device *pdev) return ret; } - /* initialize shadow register values */ - sport->ucr1 = readl(sport->port.membase + UCR1); - sport->ucr2 = readl(sport->port.membase + UCR2); - sport->ucr3 = readl(sport->port.membase + UCR3); - sport->ucr4 = readl(sport->port.membase + UCR4); - sport->ufcr = readl(sport->port.membase + UFCR); - ret = uart_get_rs485_mode(&sport->port); if (ret) { clk_disable_unprepare(sport->clk_ipg); -- cgit v1.2.3 From 42ec0b93e47f72bc701799330e67e4cef2df02c5 Mon Sep 17 00:00:00 2001 From: Daniel Starke Date: Mon, 6 Feb 2023 12:46:05 +0100 Subject: tty: n_gsm: add RING/CD control support The status lines ring and carrier detect are used by the modem to signal incoming calls (RING) or an established connection (CD). This is implemented as physical lines on a standard RS232 connection. However, the muxer protocol encodes these status lines as modem bits IC and DV. These incoming lines are masked by tty driver (see tty_io.c) and cannot be set by a user application. Allow setting RING via TIOCM_OUT1 and CD via TIOCM_OUT2 to allow implementation of a modem or modem emulator. Signed-off-by: Daniel Starke Link: https://lore.kernel.org/r/20230206114606.2133-3-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers/tty') diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 5783801d6524..c6c8ee9cbdc3 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -540,6 +540,11 @@ static u8 gsm_encode_modem(const struct gsm_dlci *dlci) modembits |= MDM_IC; if (dlci->modem_tx & TIOCM_CD || dlci->gsm->initiator) modembits |= MDM_DV; + /* special mappings for passive side to operate as UE */ + if (dlci->modem_tx & TIOCM_OUT1) + modembits |= MDM_IC; + if (dlci->modem_tx & TIOCM_OUT2) + modembits |= MDM_DV; return modembits; } -- cgit v1.2.3 From 684ae4f9513c2bb9443794608b7fc754c4ca2483 Mon Sep 17 00:00:00 2001 From: Daniel Starke Date: Mon, 6 Feb 2023 12:46:06 +0100 Subject: tty: n_gsm: add TIOCMIWAIT support Add support for the TIOCMIWAIT ioctl on the virtual ttys. This enables the user to wait for virtual modem signals like RING. More work is needed to support also TIOCGICOUNT. Signed-off-by: Daniel Starke Link: https://lore.kernel.org/r/20230206114606.2133-4-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 33 ++++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index c6c8ee9cbdc3..58ea30fd6576 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1536,6 +1536,7 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci, if (brk & 0x01) tty_insert_flip_char(&dlci->port, 0, TTY_BREAK); dlci->modem_rx = mlines; + wake_up_interruptible(&dlci->gsm->event); } /** @@ -2071,7 +2072,7 @@ static void gsm_dlci_close(struct gsm_dlci *dlci) /* A DLCI 0 close is a MUX termination so we need to kick that back to userspace somehow */ gsm_dlci_data_kick(dlci); - wake_up(&dlci->gsm->event); + wake_up_all(&dlci->gsm->event); } /** @@ -2272,6 +2273,7 @@ static void gsm_dlci_begin_close(struct gsm_dlci *dlci) dlci->state = DLCI_CLOSING; gsm_command(dlci->gsm, dlci->addr, DISC|PF); mod_timer(&dlci->t1, jiffies + gsm->t1 * HZ / 100); + wake_up_interruptible(&gsm->event); } /** @@ -3775,6 +3777,33 @@ static int gsm_modem_update(struct gsm_dlci *dlci, u8 brk) return -EPROTONOSUPPORT; } +/** + * gsm_wait_modem_change - wait for modem status line change + * @dlci: channel + * @mask: modem status line bits + * + * The function returns if: + * - any given modem status line bit changed + * - the wait event function got interrupted (e.g. by a signal) + * - the underlying DLCI was closed + * - the underlying ldisc device was removed + */ +static int gsm_wait_modem_change(struct gsm_dlci *dlci, u32 mask) +{ + struct gsm_mux *gsm = dlci->gsm; + u32 old = dlci->modem_rx; + int ret; + + ret = wait_event_interruptible(gsm->event, gsm->dead || + dlci->state != DLCI_OPEN || + (old ^ dlci->modem_rx) & mask); + if (gsm->dead) + return -ENODEV; + if (dlci->state != DLCI_OPEN) + return -EL2NSYNC; + return ret; +} + static bool gsm_carrier_raised(struct tty_port *port) { struct gsm_dlci *dlci = container_of(port, struct gsm_dlci, port); @@ -4034,6 +4063,8 @@ static int gsmtty_ioctl(struct tty_struct *tty, gsm_destroy_network(dlci); mutex_unlock(&dlci->mutex); return 0; + case TIOCMIWAIT: + return gsm_wait_modem_change(dlci, (u32)arg); default: return -ENOIOCTLCMD; } -- cgit v1.2.3 From 491581f40e4c52c4b36c83e8c75b2210ed7c358a Mon Sep 17 00:00:00 2001 From: Elliot Berman Date: Fri, 3 Feb 2023 13:01:32 -0800 Subject: soc: qcom: geni-se: Move qcom-geni-se.h to linux/soc/qcom/geni-se.h Move include/linux/qcom-geni-se.h to include/linux/soc/qcom/geni-se.h. This removes 1 of a few remaining Qualcomm-specific headers into a more approciate subdirectory under include/. Signed-off-by: Elliot Berman Acked-by: Bjorn Andersson Acked-by: Wolfram Sang # for I2C Reviewed-by: Guru Das Srinagesh Link: https://lore.kernel.org/r/20230203210133.3552796-1-quic_eberman@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/qcom_geni_serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 7c49194ec8ac..d69592e5e2ec 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -16,7 +16,7 @@ #include #include #include -#include +#include #include #include #include -- cgit v1.2.3 From 3f92730eed57f8057e1e120a0a2e8ad04ba155d4 Mon Sep 17 00:00:00 2001 From: Tom Rix Date: Sat, 11 Feb 2023 07:45:50 -0800 Subject: serial: imx: remove a redundant check cpp_check reports drivers/tty/serial/imx.c:1207:15: style: Condition 'r_bytes>0' is always true [knownConditionTrueFalse] if (r_bytes > 0) { r_byte is set to r_bytes = rx_ring->head - rx_ring->tail; The head - tail calculation is also done by the earlier check if (rx_ring->head <= sg_dma_len(sgl) && rx_ring->head > rx_ring->tail) { so r_bytes will always be > 0, so the second check is not needed. Signed-off-by: Tom Rix Reviewed-by: Iuliana Prodan Link: https://lore.kernel.org/r/20230211154550.2130670-1-trix@redhat.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 363c77a140f0..523f296d5747 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1204,11 +1204,9 @@ static void imx_uart_dma_rx_callback(void *data) r_bytes = rx_ring->head - rx_ring->tail; /* If we received something, check for 0xff flood */ - if (r_bytes > 0) { - spin_lock(&sport->port.lock); - imx_uart_check_flood(sport, imx_uart_readl(sport, USR2)); - spin_unlock(&sport->port.lock); - } + spin_lock(&sport->port.lock); + imx_uart_check_flood(sport, imx_uart_readl(sport, USR2)); + spin_unlock(&sport->port.lock); if (!(sport->port.ignore_status_mask & URXD_DUMMY_READ)) { -- cgit v1.2.3 From 72206cc730b5c9208e9a99ace1c619f542035312 Mon Sep 17 00:00:00 2001 From: Daniel Starke Date: Tue, 14 Feb 2023 13:27:37 +0100 Subject: tty: n_gsm: add keep alive support n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010. See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516 The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to the newer 27.010 here. Chapters 5.4.6.3.4 and 5.1.8.1.3 describe the test command which can be used to test the mux connection between both sides. Currently, no algorithm is implemented to make use of this command. This requires that each multiplexed upper layer protocol supervises the underlying muxer connection to handle possible connection losses. Introduce ioctl commands and functions to optionally enable keep alive handling via the test command as described in chapter 5.4.6.3.4. A single incrementing octet "ka_num" is being used for unique identification of each single keep alive packet. Retries will use the same "ka_num" value as the original packet. Retry count and interval are taken from the general parameters N2 and T2. Add usage description and basic example for the new ioctl to the n_gsm documentation. Note that support for the test command is mandatory and already present in the muxer implementation since the very first version. Also note that the previous ioctl structure gsm_config cannot be extended due to missing checks against zero of the field "unused". Signed-off-by: Daniel Starke Link: https://lore.kernel.org/r/20230214122737.1976-1-daniel.starke@siemens.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 106 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 104 insertions(+), 2 deletions(-) (limited to 'drivers/tty') diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 58ea30fd6576..7aa05ebed8e1 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -318,6 +318,11 @@ struct gsm_mux { struct gsm_control *pending_cmd;/* Our current pending command */ spinlock_t control_lock; /* Protects the pending command */ + /* Keep-alive */ + struct timer_list ka_timer; /* Keep-alive response timer */ + u8 ka_num; /* Keep-alive match pattern */ + signed int ka_retries; /* Keep-alive retry counter, -1 if not yet initialized */ + /* Configuration */ int adaption; /* 1 or 2 supported */ u8 ftype; /* UI or UIH */ @@ -325,6 +330,7 @@ struct gsm_mux { unsigned int t3; /* Power wake-up timer in seconds. */ int n2; /* Retry count */ u8 k; /* Window size */ + u32 keep_alive; /* Control channel keep-alive in 10ms */ /* Statistics (not currently exposed) */ unsigned long bad_fcs; @@ -1903,11 +1909,13 @@ static void gsm_control_response(struct gsm_mux *gsm, unsigned int command, const u8 *data, int clen) { struct gsm_control *ctrl; + struct gsm_dlci *dlci; unsigned long flags; spin_lock_irqsave(&gsm->control_lock, flags); ctrl = gsm->pending_cmd; + dlci = gsm->dlci[0]; command |= 1; /* Does the reply match our command */ if (ctrl != NULL && (command == ctrl->cmd || command == CMD_NSC)) { @@ -1922,6 +1930,53 @@ static void gsm_control_response(struct gsm_mux *gsm, unsigned int command, /* Or did we receive the PN response to our PN command */ } else if (command == CMD_PN) { gsm_control_negotiation(gsm, 0, data, clen); + /* Or did we receive the TEST response to our TEST command */ + } else if (command == CMD_TEST && clen == 1 && *data == gsm->ka_num) { + gsm->ka_retries = -1; /* trigger new keep-alive message */ + if (dlci && !dlci->dead) + mod_timer(&gsm->ka_timer, jiffies + gsm->keep_alive * HZ / 100); + } + spin_unlock_irqrestore(&gsm->control_lock, flags); +} + +/** + * gsm_control_keep_alive - check timeout or start keep-alive + * @t: timer contained in our gsm object + * + * Called off the keep-alive timer expiry signaling that our link + * partner is not responding anymore. Link will be closed. + * This is also called to startup our timer. + */ + +static void gsm_control_keep_alive(struct timer_list *t) +{ + struct gsm_mux *gsm = from_timer(gsm, t, ka_timer); + unsigned long flags; + + spin_lock_irqsave(&gsm->control_lock, flags); + if (gsm->ka_num && gsm->ka_retries == 0) { + /* Keep-alive expired -> close the link */ + if (debug & DBG_ERRORS) + pr_debug("%s keep-alive timed out\n", __func__); + spin_unlock_irqrestore(&gsm->control_lock, flags); + if (gsm->dlci[0]) + gsm_dlci_begin_close(gsm->dlci[0]); + return; + } else if (gsm->keep_alive && gsm->dlci[0] && !gsm->dlci[0]->dead) { + if (gsm->ka_retries > 0) { + /* T2 expired for keep-alive -> resend */ + gsm->ka_retries--; + } else { + /* Start keep-alive timer */ + gsm->ka_num++; + if (!gsm->ka_num) + gsm->ka_num++; + gsm->ka_retries = (signed int)gsm->n2; + } + gsm_control_command(gsm, CMD_TEST, &gsm->ka_num, + sizeof(gsm->ka_num)); + mod_timer(&gsm->ka_timer, + jiffies + gsm->t2 * HZ / 100); } spin_unlock_irqrestore(&gsm->control_lock, flags); } @@ -2067,8 +2122,10 @@ static void gsm_dlci_close(struct gsm_dlci *dlci) /* Ensure that gsmtty_open() can return. */ tty_port_set_initialized(&dlci->port, false); wake_up_interruptible(&dlci->port.open_wait); - } else + } else { + del_timer(&dlci->gsm->ka_timer); dlci->gsm->dead = true; + } /* A DLCI 0 close is a MUX termination so we need to kick that back to userspace somehow */ gsm_dlci_data_kick(dlci); @@ -2084,6 +2141,8 @@ static void gsm_dlci_close(struct gsm_dlci *dlci) static void gsm_dlci_open(struct gsm_dlci *dlci) { + struct gsm_mux *gsm = dlci->gsm; + /* Note that SABM UA .. SABM UA first UA lost can mean that we go open -> open */ del_timer(&dlci->t1); @@ -2093,8 +2152,15 @@ static void gsm_dlci_open(struct gsm_dlci *dlci) if (debug & DBG_ERRORS) pr_debug("DLCI %d goes open.\n", dlci->addr); /* Send current modem state */ - if (dlci->addr) + if (dlci->addr) { gsm_modem_update(dlci, 0); + } else { + /* Start keep-alive control */ + gsm->ka_num = 0; + gsm->ka_retries = -1; + mod_timer(&gsm->ka_timer, + jiffies + gsm->keep_alive * HZ / 100); + } gsm_dlci_data_kick(dlci); wake_up(&dlci->gsm->event); } @@ -2847,6 +2913,7 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm, bool disc) /* Finish outstanding timers, making sure they are done */ del_timer_sync(&gsm->kick_timer); del_timer_sync(&gsm->t2_timer); + del_timer_sync(&gsm->ka_timer); /* Finish writing to ldisc */ flush_work(&gsm->tx_work); @@ -2994,6 +3061,7 @@ static struct gsm_mux *gsm_alloc_mux(void) INIT_LIST_HEAD(&gsm->tx_data_list); timer_setup(&gsm->kick_timer, gsm_kick_timer, 0); timer_setup(&gsm->t2_timer, gsm_control_retransmit, 0); + timer_setup(&gsm->ka_timer, gsm_control_keep_alive, 0); INIT_WORK(&gsm->tx_work, gsmld_write_task); init_waitqueue_head(&gsm->event); spin_lock_init(&gsm->control_lock); @@ -3010,6 +3078,7 @@ static struct gsm_mux *gsm_alloc_mux(void) gsm->mru = 64; /* Default to encoding 1 so these should be 64 */ gsm->mtu = 64; gsm->dead = true; /* Avoid early tty opens */ + gsm->keep_alive = 0; /* Disabled */ /* Store the instance to the mux array or abort if no space is * available. @@ -3145,6 +3214,29 @@ static int gsm_config(struct gsm_mux *gsm, struct gsm_config *c) return 0; } +static void gsm_copy_config_ext_values(struct gsm_mux *gsm, + struct gsm_config_ext *ce) +{ + memset(ce, 0, sizeof(*ce)); + ce->keep_alive = gsm->keep_alive; +} + +static int gsm_config_ext(struct gsm_mux *gsm, struct gsm_config_ext *ce) +{ + unsigned int i; + + /* + * Check that userspace doesn't put stuff in here to prevent breakages + * in the future. + */ + for (i = 0; i < ARRAY_SIZE(ce->reserved); i++) + if (ce->reserved[i]) + return -EINVAL; + + gsm->keep_alive = ce->keep_alive; + return 0; +} + /** * gsmld_output - write to link * @gsm: our mux @@ -3463,6 +3555,7 @@ static int gsmld_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { struct gsm_config c; + struct gsm_config_ext ce; struct gsm_mux *gsm = tty->disc_data; unsigned int base; @@ -3479,6 +3572,15 @@ static int gsmld_ioctl(struct tty_struct *tty, unsigned int cmd, case GSMIOC_GETFIRST: base = mux_num_to_base(gsm); return put_user(base + 1, (__u32 __user *)arg); + case GSMIOC_GETCONF_EXT: + gsm_copy_config_ext_values(gsm, &ce); + if (copy_to_user((void __user *)arg, &ce, sizeof(ce))) + return -EFAULT; + return 0; + case GSMIOC_SETCONF_EXT: + if (copy_from_user(&ce, (void __user *)arg, sizeof(ce))) + return -EFAULT; + return gsm_config_ext(gsm, &ce); default: return n_tty_ioctl_helper(tty, cmd, arg); } -- cgit v1.2.3