diff options
Diffstat (limited to 'drivers/staging/cxt1e1/pmc93x6_eeprom.c')
| -rw-r--r-- | drivers/staging/cxt1e1/pmc93x6_eeprom.c | 532 |
1 files changed, 0 insertions, 532 deletions
diff --git a/drivers/staging/cxt1e1/pmc93x6_eeprom.c b/drivers/staging/cxt1e1/pmc93x6_eeprom.c deleted file mode 100644 index ba588f1b2110..000000000000 --- a/drivers/staging/cxt1e1/pmc93x6_eeprom.c +++ /dev/null @@ -1,532 +0,0 @@ -/* pmc93x6_eeprom.c - PMC's 93LC46 EEPROM Device - * - * The 93LC46 is a low-power, serial Electrically Erasable and - * Programmable Read Only Memory organized as 128 8-bit bytes. - * - * Accesses to the 93LC46 are done in a bit serial stream, organized - * in a 3 wire format. Writes are internally timed by the device - * (the In data bit is pulled low until the write is complete and - * then is pulled high) and take about 6 milliseconds. - * - * Copyright (C) 2003-2005 SBE, Inc. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/types.h> -#include "pmcc4_sysdep.h" -#include "sbecom_inline_linux.h" -#include "pmcc4.h" -#include "sbe_promformat.h" -#include "pmc93x6_eeprom.h" - -#ifndef TRUE -#define TRUE 1 -#define FALSE 0 -#endif - -/*------------------------------------------------------------------------ - * EEPROM address definitions - *------------------------------------------------------------------------ - * - * The offset in the definitions below allows the test to skip over - * areas of the EEPROM that other programs (such a VxWorks) are - * using. - */ - -#define EE_MFG (long)0 /* Index to manufacturing record */ -#define EE_FIRST 0x28 /* Index to start testing at */ -#define EE_LIMIT 128 /* Index to end testing at */ - -/* Bit Ordering for Instructions - * - * A0, A1, A2, A3, A4, A5, A6, OP0, OP1, SB (lsb, or 1st bit out) - * - */ - -#define EPROM_EWEN 0x0019 /* Erase/Write enable (reversed) */ -#define EPROM_EWDS 0x0001 /* Erase/Write disable (reversed) */ -#define EPROM_READ 0x0003 /* Read (reversed) */ -#define EPROM_WRITE 0x0005 /* Write (reversed) */ -#define EPROM_ERASE 0x0007 /* Erase (reversed) */ -#define EPROM_ERAL 0x0009 /* Erase All (reversed) */ -#define EPROM_WRAL 0x0011 /* Write All (reversed) */ - -#define EPROM_ADR_SZ 7 /* Number of bits in offset address */ -#define EPROM_OP_SZ 3 /* Number of bits in command */ -#define SIZE_ADDR_OP (EPROM_ADR_SZ + EPROM_OP_SZ) -#define LC46A_MAX_OPS 10 /* Number of bits in Instruction */ -#define NUM_OF_BITS 8 /* Number of bits in data */ - -/* EEPROM signal bits */ -#define EPROM_ACTIVE_OUT_BIT 0x0001 /* Out data bit */ -#define EPROM_ACTIVE_IN_BIT 0x0002 /* In data bit */ -#define ACTIVE_IN_BIT_SHIFT 0x0001 /* Shift In data bit to LSB */ -#define EPROM_ENCS 0x0004 /* Set EEPROM CS during operation */ - -/*------------------------------------------------------------------------ - * The ByteReverse table is used to reverses the 8 bits within a byte - *------------------------------------------------------------------------ - */ - -static unsigned char ByteReverse[256]; -static int ByteReverseBuilt = FALSE; - -/*------------------------------------------------------------------------ - * mfg_template - initial serial EEPROM data structure - *------------------------------------------------------------------------ - */ - -static u8 mfg_template[sizeof(FLD_TYPE2)] = { - PROM_FORMAT_TYPE2, /* type; */ - 0x00, 0x1A, /* length[2]; */ - 0x00, 0x00, 0x00, 0x00, /* Crc32[4]; */ - 0x11, 0x76, /* Id[2]; */ - 0x07, 0x05, /* SubId[2] E1; */ - 0x00, 0xA0, 0xD6, 0x00, 0x00, 0x00, /* Serial[6]; */ - 0x00, 0x00, 0x00, 0x00, /* CreateTime[4]; */ - 0x00, 0x00, 0x00, 0x00, /* HeatRunTime[4]; */ - 0x00, 0x00, 0x00, 0x00, /* HeatRunIterations[4]; */ - 0x00, 0x00, 0x00, 0x00, /* HeatRunErrors[4]; */ -}; - -/*------------------------------------------------------------------------ - * BuildByteReverse - build the 8-bit reverse table - *------------------------------------------------------------------------ - * - * The 'ByteReverse' table reverses the 8 bits within a byte - * (the MSB becomes the LSB etc.). - */ - -static void BuildByteReverse(void) -{ - /* Used to build by powers to 2 */ - long half; - int i; - - ByteReverse[0] = 0; - - for (half = 1; half < sizeof(ByteReverse); half <<= 1) - for (i = 0; i < half; i++) - ByteReverse[half + i] = - (char)(ByteReverse[i] | (0x80 / half)); - - ByteReverseBuilt = TRUE; -} - -/*------------------------------------------------------------------------ - * eeprom_delay - small delay for EEPROM timing - *------------------------------------------------------------------------ - */ - -static void eeprom_delay(void) -{ - int timeout; - - for (timeout = 20; timeout; --timeout) - OS_uwait_dummy(); -} - -/*------------------------------------------------------------------------ - * eeprom_put_byte - Send a byte to the EEPROM serially - *------------------------------------------------------------------------ - * - * Given the PCI address and the data, this routine serially sends - * the data to the EEPROM. - */ - -static void eeprom_put_byte(long addr, long data, int count) -{ - u_int32_t output; - - while (--count >= 0) { - /* Get next data bit */ - output = (data & EPROM_ACTIVE_OUT_BIT) ? 1 : 0; - /* Add Chip Select */ - output |= EPROM_ENCS; - data >>= 1; - - eeprom_delay(); - /* Output it */ - pci_write_32((u_int32_t *) addr, output); - } -} - -/*------------------------------------------------------------------------ - * eeprom_get_byte - Receive a byte from the EEPROM serially - *------------------------------------------------------------------------ - * - * Given the PCI address, this routine serially fetches the data - * from the EEPROM. - */ - -static u_int32_t eeprom_get_byte(long addr) -{ - u_int32_t input; - u_int32_t data; - int count; - -/* Start the Reading of DATA - * - * The first read is a dummy as the data is latched in the - * EPLD and read on the next read access to the EEPROM. - */ - - input = pci_read_32((u_int32_t *) addr); - - data = 0; - count = NUM_OF_BITS; - while (--count >= 0) { - eeprom_delay(); - input = pci_read_32((u_int32_t *) addr); - - /* Shift data over */ - data <<= 1; - data |= (input & EPROM_ACTIVE_IN_BIT) ? 1 : 0; - - } - - return data; -} - -/*------------------------------------------------------------------------ - * disable_pmc_eeprom - Disable writes to the EEPROM - *------------------------------------------------------------------------ - * - * Issue the EEPROM command to disable writes. - */ - -static void disable_pmc_eeprom(long addr) -{ - eeprom_put_byte(addr, EPROM_EWDS, SIZE_ADDR_OP); - - /* this removes Chip Select from EEPROM */ - pci_write_32((u_int32_t *) addr, 0); -} - -/*------------------------------------------------------------------------ - * enable_pmc_eeprom - Enable writes to the EEPROM - *------------------------------------------------------------------------ - * - * Issue the EEPROM command to enable writes. - */ - -static void enable_pmc_eeprom(long addr) -{ - eeprom_put_byte(addr, EPROM_EWEN, SIZE_ADDR_OP); - - /* this removes Chip Select from EEPROM */ - pci_write_32((u_int32_t *) addr, 0); -} - -/*------------------------------------------------------------------------ - * pmc_eeprom_read - EEPROM location read - *------------------------------------------------------------------------ - * - * Given a EEPROM PCI address and location offset, this routine returns - * the contents of the specified location to the calling routine. - */ - -static u_int32_t pmc_eeprom_read(long addr, long mem_offset) -{ - /* Data from chip */ - u_int32_t data; - - if (!ByteReverseBuilt) - BuildByteReverse(); - - /* Reverse address */ - mem_offset = ByteReverse[0x7F & mem_offset]; - - /* - * NOTE: The max offset address is 128 or half the reversal table. So - * the LSB is always zero and counts as a built in shift of one bit. - * So even though we need to shift 3 bits to make room for the command, - * we only need to shift twice more because of the built in shift. - */ - - /* Shift for command */ - mem_offset <<= 2; - /* Add command */ - mem_offset |= EPROM_READ; - - /* Output chip address */ - eeprom_put_byte(addr, mem_offset, SIZE_ADDR_OP); - - /* Read chip data */ - data = eeprom_get_byte(addr); - - /* Remove Chip Select from EEPROM */ - pci_write_32((u_int32_t *) addr, 0); - - return (data & 0x000000FF); -} - -/*------------------------------------------------------------------------ - * pmc_eeprom_write - EEPROM location write - *------------------------------------------------------------------------ - * - * Given a EEPROM PCI address, location offset and value, this - * routine writes the value to the specified location. - * - * Note: it is up to the caller to determine if the write - * operation succeeded. - */ - -static int pmc_eeprom_write(long addr, long mem_offset, u_int32_t data) -{ - u_int32_t temp; - int count; - - if (!ByteReverseBuilt) - BuildByteReverse(); - - /* Reverse address */ - mem_offset = ByteReverse[0x7F & mem_offset]; - - /* - * NOTE: The max offset address is 128 or half the reversal table. So - * the LSB is always zero and counts as a built in shift of one bit. - * So even though we need to shift 3 bits to make room for the command, - * we only need to shift twice more because of the built in shift. - */ - - /* Shift for command */ - mem_offset <<= 2; - /* Add command */ - mem_offset |= EPROM_WRITE; - - /* Output chip address */ - eeprom_put_byte(addr, mem_offset, SIZE_ADDR_OP); - - /* Reverse data */ - data = ByteReverse[0xFF & data]; - /* Output chip data */ - eeprom_put_byte(addr, data, NUM_OF_BITS); - - /* Remove Chip Select from EEPROM */ - pci_write_32((u_int32_t *) addr, 0); - -/* - * Must see Data In at a low state before completing this transaction. - * - * Afterwards, the data bit will return to a high state, ~6 ms, terminating - * the operation. - */ - /* Re-enable Chip Select */ - pci_write_32((u_int32_t *) addr, EPROM_ENCS); - /* discard first read */ - temp = pci_read_32((u_int32_t *) addr); - temp = pci_read_32((u_int32_t *) addr); - if (temp & EPROM_ACTIVE_IN_BIT) { - temp = pci_read_32((u_int32_t *) addr); - if (temp & EPROM_ACTIVE_IN_BIT) { - /* Remove Chip Select from EEPROM */ - pci_write_32((u_int32_t *) addr, 0); - return 1; - } - } - count = 1000; - while (count--) { - for (temp = 0; temp < 0x10; temp++) - OS_uwait_dummy(); - - if (pci_read_32((u_int32_t *) addr) & EPROM_ACTIVE_IN_BIT) - break; - } - - if (count == -1) - return 2; - - return 0; -} - -/*------------------------------------------------------------------------ - * pmcGetBuffValue - read the specified value from buffer - *------------------------------------------------------------------------ - */ - -static long pmcGetBuffValue(char *ptr, int size) -{ - long value = 0; - int index; - - for (index = 0; index < size; ++index) { - value <<= 8; - value |= ptr[index] & 0xFF; - } - - return value; -} - -/*------------------------------------------------------------------------ - * pmcSetBuffValue - save the specified value to buffer - *------------------------------------------------------------------------ - */ - -static void pmcSetBuffValue(char *ptr, long value, int size) -{ - int index = size; - - while (--index >= 0) { - ptr[index] = (char)(value & 0xFF); - value >>= 8; - } -} - -/*------------------------------------------------------------------------ - * pmc_eeprom_read_buffer - read EEPROM data into specified buffer - *------------------------------------------------------------------------ - */ - -void -pmc_eeprom_read_buffer(long addr, long mem_offset, char *dest_ptr, int size) -{ - while (--size >= 0) - *dest_ptr++ = (char)pmc_eeprom_read(addr, mem_offset++); -} - -/*------------------------------------------------------------------------ - * pmc_eeprom_write_buffer - write EEPROM data from specified buffer - *------------------------------------------------------------------------ - */ - -void -pmc_eeprom_write_buffer(long addr, long mem_offset, char *dest_ptr, int size) -{ - enable_pmc_eeprom(addr); - - while (--size >= 0) - pmc_eeprom_write(addr, mem_offset++, *dest_ptr++); - - disable_pmc_eeprom(addr); -} - -/*------------------------------------------------------------------------ - * pmcCalcCrc - calculate the CRC for the serial EEPROM structure - *------------------------------------------------------------------------ - */ - -static u_int32_t pmcCalcCrc_T01(void *bufp) -{ - FLD_TYPE2 *buf = bufp; - /* CRC of the structure */ - u_int32_t crc; - - /* Calc CRC for type and length fields */ - sbeCrc((u_int8_t *) &buf->type, - (u_int32_t) STRUCT_OFFSET(FLD_TYPE1, Crc32), - (u_int32_t) 0, (u_int32_t *) &crc); - -#ifdef EEPROM_TYPE_DEBUG - /* RLD DEBUG */ - pr_info("sbeCrc: crc 1 calculated as %08x\n", crc); -#endif - return ~crc; -} - -static u_int32_t pmcCalcCrc_T02(void *bufp) -{ - FLD_TYPE2 *buf = bufp; - /* CRC of the structure */ - u_int32_t crc; - - /* Calc CRC for type and length fields */ - sbeCrc((u_int8_t *) &buf->type, - (u_int32_t) STRUCT_OFFSET(FLD_TYPE2, Crc32), - (u_int32_t) 0, (u_int32_t *) &crc); - - /* Calc CRC for remaining fields */ - sbeCrc((u_int8_t *) &buf->Id[0], - (u_int32_t) (sizeof(FLD_TYPE2) - STRUCT_OFFSET(FLD_TYPE2, Id)), - (u_int32_t) crc, (u_int32_t *) &crc); - -#ifdef EEPROM_TYPE_DEBUG - /* RLD DEBUG */ - pr_info("sbeCrc: crc 2 calculated as %08x\n", crc); -#endif - return crc; -} - -/*------------------------------------------------------------------------ - * pmc_init_seeprom - initialize the serial EEPROM structure - *------------------------------------------------------------------------ - * - * At the front of the serial EEPROM there is a record that contains - * manufacturing information. If the info does not already exist, it - * is created. The only field modifiable by the operator is the - * serial number field. - */ - -void pmc_init_seeprom(u_int32_t addr, u_int32_t serialNum) -{ - /* Memory image of structure */ - PROMFORMAT buffer; - /* CRC of structure */ - u_int32_t crc; - time_t createTime; - - createTime = get_seconds(); - - /* use template data */ - memcpy(&buffer.fldType2, mfg_template, sizeof(buffer.fldType2)); - - /* Update serial number field in buffer */ - pmcSetBuffValue(&buffer.fldType2.Serial[3], serialNum, 3); - - /* Update create time field in buffer */ - pmcSetBuffValue(&buffer.fldType2.CreateTime[0], createTime, 4); - - /* Update CRC field in buffer */ - crc = pmcCalcCrc_T02(&buffer); - pmcSetBuffValue(&buffer.fldType2.Crc32[0], crc, 4); - -#ifdef DEBUG - for (i = 0; i < sizeof(FLD_TYPE2); ++i) - pr_info("[%02X] = %02X\n", i, buffer.bytes[i] & 0xFF); -#endif - - /* Write structure to serial EEPROM */ - pmc_eeprom_write_buffer(addr, EE_MFG, (char *)&buffer, - sizeof(FLD_TYPE2)); -} - -char pmc_verify_cksum(void *bufp) -{ - FLD_TYPE1 *buf1 = bufp; - FLD_TYPE2 *buf2 = bufp; - /* CRC read from EEPROM */ - u_int32_t crc1, crc2; - - /* Retrieve contents of CRC field */ - crc1 = pmcGetBuffValue(&buf1->Crc32[0], sizeof(buf1->Crc32)); -#ifdef EEPROM_TYPE_DEBUG - /* RLD DEBUG */ - pr_info("EEPROM: chksum 1 reads as %08x\n", crc1); -#endif - if ((buf1->type == PROM_FORMAT_TYPE1) && - (pmcCalcCrc_T01((void *)buf1) == crc1)) - return PROM_FORMAT_TYPE1; /* checksum type 1 verified */ - - crc2 = pmcGetBuffValue(&buf2->Crc32[0], sizeof(buf2->Crc32)); -#ifdef EEPROM_TYPE_DEBUG - /* RLD DEBUG */ - pr_info("EEPROM: chksum 2 reads as %08x\n", crc2); -#endif - if ((buf2->type == PROM_FORMAT_TYPE2) && - (pmcCalcCrc_T02((void *)buf2) == crc2)) - return PROM_FORMAT_TYPE2; /* checksum type 2 verified */ - - /* failed to validate */ - return PROM_FORMAT_Unk; -} |