diff options
author | 2005-04-16 15:20:36 -0700 | |
---|---|---|
committer | 2005-04-16 15:20:36 -0700 | |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/oss/dmasound/dmasound_q40.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/oss/dmasound/dmasound_q40.c')
-rw-r--r-- | sound/oss/dmasound/dmasound_q40.c | 634 |
1 files changed, 634 insertions, 0 deletions
diff --git a/sound/oss/dmasound/dmasound_q40.c b/sound/oss/dmasound/dmasound_q40.c new file mode 100644 index 000000000000..92c25a0174db --- /dev/null +++ b/sound/oss/dmasound/dmasound_q40.c @@ -0,0 +1,634 @@ +/* + * linux/sound/oss/dmasound/dmasound_q40.c + * + * Q40 DMA Sound Driver + * + * See linux/sound/oss/dmasound/dmasound_core.c for copyright and credits + * prior to 28/01/2001 + * + * 28/01/2001 [0.1] Iain Sandoe + * - added versioning + * - put in and populated the hardware_afmts field. + * [0.2] - put in SNDCTL_DSP_GETCAPS value. + * [0.3] - put in default hard/soft settings. + */ + + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/soundcard.h> +#include <linux/interrupt.h> + +#include <asm/uaccess.h> +#include <asm/q40ints.h> +#include <asm/q40_master.h> + +#include "dmasound.h" + +#define DMASOUND_Q40_REVISION 0 +#define DMASOUND_Q40_EDITION 3 + +static int expand_bal; /* Balance factor for expanding (not volume!) */ +static int expand_data; /* Data for expanding */ + + +/*** Low level stuff *********************************************************/ + + +static void *Q40Alloc(unsigned int size, int flags); +static void Q40Free(void *, unsigned int); +static int Q40IrqInit(void); +#ifdef MODULE +static void Q40IrqCleanUp(void); +#endif +static void Q40Silence(void); +static void Q40Init(void); +static int Q40SetFormat(int format); +static int Q40SetVolume(int volume); +static void Q40PlayNextFrame(int index); +static void Q40Play(void); +static irqreturn_t Q40StereoInterrupt(int irq, void *dummy, struct pt_regs *fp); +static irqreturn_t Q40MonoInterrupt(int irq, void *dummy, struct pt_regs *fp); +static void Q40Interrupt(void); + + +/*** Mid level stuff *********************************************************/ + + + +/* userCount, frameUsed, frameLeft == byte counts */ +static ssize_t q40_ct_law(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + char *table = dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8: dmasound_alaw2dma8; + ssize_t count, used; + u_char *p = (u_char *) &frame[*frameUsed]; + + used = count = min_t(size_t, userCount, frameLeft); + if (copy_from_user(p,userPtr,count)) + return -EFAULT; + while (count > 0) { + *p = table[*p]+128; + p++; + count--; + } + *frameUsed += used ; + return used; +} + + +static ssize_t q40_ct_s8(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + ssize_t count, used; + u_char *p = (u_char *) &frame[*frameUsed]; + + used = count = min_t(size_t, userCount, frameLeft); + if (copy_from_user(p,userPtr,count)) + return -EFAULT; + while (count > 0) { + *p = *p + 128; + p++; + count--; + } + *frameUsed += used; + return used; +} + +static ssize_t q40_ct_u8(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + ssize_t count, used; + u_char *p = (u_char *) &frame[*frameUsed]; + + used = count = min_t(size_t, userCount, frameLeft); + if (copy_from_user(p,userPtr,count)) + return -EFAULT; + *frameUsed += used; + return used; +} + + +/* a bit too complicated to optimise right now ..*/ +static ssize_t q40_ctx_law(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + unsigned char *table = (unsigned char *) + (dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8: dmasound_alaw2dma8); + unsigned int data = expand_data; + u_char *p = (u_char *) &frame[*frameUsed]; + int bal = expand_bal; + int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed; + int utotal, ftotal; + + ftotal = frameLeft; + utotal = userCount; + while (frameLeft) { + u_char c; + if (bal < 0) { + if (userCount == 0) + break; + if (get_user(c, userPtr++)) + return -EFAULT; + data = table[c]; + data += 0x80; + userCount--; + bal += hSpeed; + } + *p++ = data; + frameLeft--; + bal -= sSpeed; + } + expand_bal = bal; + expand_data = data; + *frameUsed += (ftotal - frameLeft); + utotal -= userCount; + return utotal; +} + + +static ssize_t q40_ctx_s8(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + u_char *p = (u_char *) &frame[*frameUsed]; + unsigned int data = expand_data; + int bal = expand_bal; + int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed; + int utotal, ftotal; + + + ftotal = frameLeft; + utotal = userCount; + while (frameLeft) { + u_char c; + if (bal < 0) { + if (userCount == 0) + break; + if (get_user(c, userPtr++)) + return -EFAULT; + data = c ; + data += 0x80; + userCount--; + bal += hSpeed; + } + *p++ = data; + frameLeft--; + bal -= sSpeed; + } + expand_bal = bal; + expand_data = data; + *frameUsed += (ftotal - frameLeft); + utotal -= userCount; + return utotal; +} + + +static ssize_t q40_ctx_u8(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + u_char *p = (u_char *) &frame[*frameUsed]; + unsigned int data = expand_data; + int bal = expand_bal; + int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed; + int utotal, ftotal; + + ftotal = frameLeft; + utotal = userCount; + while (frameLeft) { + u_char c; + if (bal < 0) { + if (userCount == 0) + break; + if (get_user(c, userPtr++)) + return -EFAULT; + data = c ; + userCount--; + bal += hSpeed; + } + *p++ = data; + frameLeft--; + bal -= sSpeed; + } + expand_bal = bal; + expand_data = data; + *frameUsed += (ftotal - frameLeft) ; + utotal -= userCount; + return utotal; +} + +/* compressing versions */ +static ssize_t q40_ctc_law(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + unsigned char *table = (unsigned char *) + (dmasound.soft.format == AFMT_MU_LAW ? dmasound_ulaw2dma8: dmasound_alaw2dma8); + unsigned int data = expand_data; + u_char *p = (u_char *) &frame[*frameUsed]; + int bal = expand_bal; + int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed; + int utotal, ftotal; + + ftotal = frameLeft; + utotal = userCount; + while (frameLeft) { + u_char c; + while(bal<0) { + if (userCount == 0) + goto lout; + if (!(bal<(-hSpeed))) { + if (get_user(c, userPtr)) + return -EFAULT; + data = 0x80 + table[c]; + } + userPtr++; + userCount--; + bal += hSpeed; + } + *p++ = data; + frameLeft--; + bal -= sSpeed; + } + lout: + expand_bal = bal; + expand_data = data; + *frameUsed += (ftotal - frameLeft); + utotal -= userCount; + return utotal; +} + + +static ssize_t q40_ctc_s8(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + u_char *p = (u_char *) &frame[*frameUsed]; + unsigned int data = expand_data; + int bal = expand_bal; + int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed; + int utotal, ftotal; + + ftotal = frameLeft; + utotal = userCount; + while (frameLeft) { + u_char c; + while (bal < 0) { + if (userCount == 0) + goto lout; + if (!(bal<(-hSpeed))) { + if (get_user(c, userPtr)) + return -EFAULT; + data = c + 0x80; + } + userPtr++; + userCount--; + bal += hSpeed; + } + *p++ = data; + frameLeft--; + bal -= sSpeed; + } + lout: + expand_bal = bal; + expand_data = data; + *frameUsed += (ftotal - frameLeft); + utotal -= userCount; + return utotal; +} + + +static ssize_t q40_ctc_u8(const u_char *userPtr, size_t userCount, + u_char frame[], ssize_t *frameUsed, + ssize_t frameLeft) +{ + u_char *p = (u_char *) &frame[*frameUsed]; + unsigned int data = expand_data; + int bal = expand_bal; + int hSpeed = dmasound.hard.speed, sSpeed = dmasound.soft.speed; + int utotal, ftotal; + + ftotal = frameLeft; + utotal = userCount; + while (frameLeft) { + u_char c; + while (bal < 0) { + if (userCount == 0) + goto lout; + if (!(bal<(-hSpeed))) { + if (get_user(c, userPtr)) + return -EFAULT; + data = c ; + } + userPtr++; + userCount--; + bal += hSpeed; + } + *p++ = data; + frameLeft--; + bal -= sSpeed; + } + lout: + expand_bal = bal; + expand_data = data; + *frameUsed += (ftotal - frameLeft) ; + utotal -= userCount; + return utotal; +} + + +static TRANS transQ40Normal = { + q40_ct_law, q40_ct_law, q40_ct_s8, q40_ct_u8, NULL, NULL, NULL, NULL +}; + +static TRANS transQ40Expanding = { + q40_ctx_law, q40_ctx_law, q40_ctx_s8, q40_ctx_u8, NULL, NULL, NULL, NULL +}; + +static TRANS transQ40Compressing = { + q40_ctc_law, q40_ctc_law, q40_ctc_s8, q40_ctc_u8, NULL, NULL, NULL, NULL +}; + + +/*** Low level stuff *********************************************************/ + +static void *Q40Alloc(unsigned int size, int flags) +{ + return kmalloc(size, flags); /* change to vmalloc */ +} + +static void Q40Free(void *ptr, unsigned int size) +{ + kfree(ptr); +} + +static int __init Q40IrqInit(void) +{ + /* Register interrupt handler. */ + request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0, + "DMA sound", Q40Interrupt); + + return(1); +} + + +#ifdef MODULE +static void Q40IrqCleanUp(void) +{ + master_outb(0,SAMPLE_ENABLE_REG); + free_irq(Q40_IRQ_SAMPLE, Q40Interrupt); +} +#endif /* MODULE */ + + +static void Q40Silence(void) +{ + master_outb(0,SAMPLE_ENABLE_REG); + *DAC_LEFT=*DAC_RIGHT=127; +} + +static char *q40_pp; +static unsigned int q40_sc; + +static void Q40PlayNextFrame(int index) +{ + u_char *start; + u_long size; + u_char speed; + + /* used by Q40Play() if all doubts whether there really is something + * to be played are already wiped out. + */ + start = write_sq.buffers[write_sq.front]; + size = (write_sq.count == index ? write_sq.rear_size : write_sq.block_size); + + q40_pp=start; + q40_sc=size; + + write_sq.front = (write_sq.front+1) % write_sq.max_count; + write_sq.active++; + + speed=(dmasound.hard.speed==10000 ? 0 : 1); + + master_outb( 0,SAMPLE_ENABLE_REG); + free_irq(Q40_IRQ_SAMPLE, Q40Interrupt); + if (dmasound.soft.stereo) + request_irq(Q40_IRQ_SAMPLE, Q40StereoInterrupt, 0, + "Q40 sound", Q40Interrupt); + else + request_irq(Q40_IRQ_SAMPLE, Q40MonoInterrupt, 0, + "Q40 sound", Q40Interrupt); + + master_outb( speed, SAMPLE_RATE_REG); + master_outb( 1,SAMPLE_CLEAR_REG); + master_outb( 1,SAMPLE_ENABLE_REG); +} + +static void Q40Play(void) +{ + unsigned long flags; + + if (write_sq.active || write_sq.count<=0 ) { + /* There's already a frame loaded */ + return; + } + + /* nothing in the queue */ + if (write_sq.count <= 1 && write_sq.rear_size < write_sq.block_size && !write_sq.syncing) { + /* hmmm, the only existing frame is not + * yet filled and we're not syncing? + */ + return; + } + spin_lock_irqsave(&dmasound.lock, flags); + Q40PlayNextFrame(1); + spin_unlock_irqrestore(&dmasound.lock, flags); +} + +static irqreturn_t Q40StereoInterrupt(int irq, void *dummy, struct pt_regs *fp) +{ + spin_lock(&dmasound.lock); + if (q40_sc>1){ + *DAC_LEFT=*q40_pp++; + *DAC_RIGHT=*q40_pp++; + q40_sc -=2; + master_outb(1,SAMPLE_CLEAR_REG); + }else Q40Interrupt(); + spin_unlock(&dmasound.lock); + return IRQ_HANDLED; +} +static irqreturn_t Q40MonoInterrupt(int irq, void *dummy, struct pt_regs *fp) +{ + spin_lock(&dmasound.lock); + if (q40_sc>0){ + *DAC_LEFT=*q40_pp; + *DAC_RIGHT=*q40_pp++; + q40_sc --; + master_outb(1,SAMPLE_CLEAR_REG); + }else Q40Interrupt(); + spin_unlock(&dmasound.lock); + return IRQ_HANDLED; +} +static void Q40Interrupt(void) +{ + if (!write_sq.active) { + /* playing was interrupted and sq_reset() has already cleared + * the sq variables, so better don't do anything here. + */ + WAKE_UP(write_sq.sync_queue); + master_outb(0,SAMPLE_ENABLE_REG); /* better safe */ + goto exit; + } else write_sq.active=0; + write_sq.count--; + Q40Play(); + + if (q40_sc<2) + { /* there was nothing to play, disable irq */ + master_outb(0,SAMPLE_ENABLE_REG); + *DAC_LEFT=*DAC_RIGHT=127; + } + WAKE_UP(write_sq.action_queue); + + exit: + master_outb(1,SAMPLE_CLEAR_REG); +} + + +static void Q40Init(void) +{ + int i, idx; + const int freq[] = {10000, 20000}; + + /* search a frequency that fits into the allowed error range */ + + idx = -1; + for (i = 0; i < 2; i++) + if ((100 * abs(dmasound.soft.speed - freq[i]) / freq[i]) <= catchRadius) + idx = i; + + dmasound.hard = dmasound.soft; + /*sound.hard.stereo=1;*/ /* no longer true */ + dmasound.hard.size=8; + + if (idx > -1) { + dmasound.soft.speed = freq[idx]; + dmasound.trans_write = &transQ40Normal; + } else + dmasound.trans_write = &transQ40Expanding; + + Q40Silence(); + + if (dmasound.hard.speed > 20200) { + /* squeeze the sound, we do that */ + dmasound.hard.speed = 20000; + dmasound.trans_write = &transQ40Compressing; + } else if (dmasound.hard.speed > 10000) { + dmasound.hard.speed = 20000; + } else { + dmasound.hard.speed = 10000; + } + expand_bal = -dmasound.soft.speed; +} + + +static int Q40SetFormat(int format) +{ + /* Q40 sound supports only 8bit modes */ + + switch (format) { + case AFMT_QUERY: + return(dmasound.soft.format); + case AFMT_MU_LAW: + case AFMT_A_LAW: + case AFMT_S8: + case AFMT_U8: + break; + default: + format = AFMT_S8; + } + + dmasound.soft.format = format; + dmasound.soft.size = 8; + if (dmasound.minDev == SND_DEV_DSP) { + dmasound.dsp.format = format; + dmasound.dsp.size = 8; + } + Q40Init(); + + return(format); +} + +static int Q40SetVolume(int volume) +{ + return 0; +} + + +/*** Machine definitions *****************************************************/ + +static SETTINGS def_hard = { + .format = AFMT_U8, + .stereo = 0, + .size = 8, + .speed = 10000 +} ; + +static SETTINGS def_soft = { + .format = AFMT_U8, + .stereo = 0, + .size = 8, + .speed = 8000 +} ; + +static MACHINE machQ40 = { + .name = "Q40", + .name2 = "Q40", + .owner = THIS_MODULE, + .dma_alloc = Q40Alloc, + .dma_free = Q40Free, + .irqinit = Q40IrqInit, +#ifdef MODULE + .irqcleanup = Q40IrqCleanUp, +#endif /* MODULE */ + .init = Q40Init, + .silence = Q40Silence, + .setFormat = Q40SetFormat, + .setVolume = Q40SetVolume, + .play = Q40Play, + .min_dsp_speed = 10000, + .version = ((DMASOUND_Q40_REVISION<<8) | DMASOUND_Q40_EDITION), + .hardware_afmts = AFMT_U8, /* h'ware-supported formats *only* here */ + .capabilities = DSP_CAP_BATCH /* As per SNDCTL_DSP_GETCAPS */ +}; + + +/*** Config & Setup **********************************************************/ + + +int __init dmasound_q40_init(void) +{ + if (MACH_IS_Q40) { + dmasound.mach = machQ40; + dmasound.mach.default_hard = def_hard ; + dmasound.mach.default_soft = def_soft ; + return dmasound_init(); + } else + return -ENODEV; +} + +static void __exit dmasound_q40_cleanup(void) +{ + dmasound_deinit(); +} + +module_init(dmasound_q40_init); +module_exit(dmasound_q40_cleanup); + +MODULE_DESCRIPTION("Q40/Q60 sound driver"); +MODULE_LICENSE("GPL"); |