/*
* sound/sb_audio.c
*
* Audio routines for Sound Blaster compatible cards.
*
*
* Copyright (C) by Hannu Savolainen 1993-1997
*
* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
* Version 2 (June 1991). See the "COPYING" file distributed with this software
* for more info.
*
* Changes
* Alan Cox : Formatting and clean ups
*
* Status
* Mostly working. mmap bug still present (swaps channels)
*/
#include <linux/config.h>
#include "sound_config.h"
#ifdef CONFIG_SBDSP
#include "sb_mixer.h"
#include "sb.h"
static int sb_audio_open(int dev, int mode)
{
sb_devc *devc = audio_devs[dev]->devc;
unsigned long flags;
if (devc == NULL)
{
printk(KERN_ERR "SB: Incomplete initialization\n");
return -ENXIO;
}
if (devc->caps & SB_NO_RECORDING && mode & OPEN_READ)
{
if (mode == OPEN_READ)
return -EPERM;
}
save_flags(flags);
cli();
if (devc->opened)
{
restore_flags(flags);
return -EBUSY;
}
if (devc->dma16 != -1 && devc->dma16 != devc->dma8)
{
if (sound_open_dma(devc->dma16, "Sound Blaster 16 bit"))
{
restore_flags(flags);
return -EBUSY;
}
}
devc->opened = mode;
restore_flags(flags);
devc->irq_mode = IMODE_NONE;
sb_dsp_reset(devc);
/* The ALS007 seems to require that the DSP be removed from the output */
/* in order for recording to be activated properly. This is done by */
/* setting the appropriate bits of the output control register 4ch to */
/* zero. This code assumes that the output control registers are not */
/* used anywhere else and therefore the DSP bits are *always* ON for */
/* output and OFF for sampling. */
if (devc->submodel == SUBMDL_ALS007)
{
if (mode & OPEN_READ)
sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
sb_getmixer(devc,ALS007_OUTPUT_CTRL2) & 0xf9);
else
sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
sb_getmixer(devc,ALS007_OUTPUT_CTRL2) | 0x06);
}
return 0;
}
static void sb_audio_close(int dev)
{
sb_devc *devc = audio_devs[dev]->devc;
audio_devs[dev]->dmap_in->dma = audio_devs[dev]->dmap_out->dma = devc->dma8;
if (devc->dma16 != -1 && devc->dma16 != devc->dma8)
sound_close_dma(devc->dma16);
/* For ALS007, turn DSP output back on if closing the device for read */
if ((devc->submodel == SUBMDL_ALS007) && (devc->opened & OPEN_READ))
{
sb_setmixer(devc,ALS007_OUTPUT_CTRL2,
sb_getmixer(devc,ALS007_OUTPUT_CTRL2) | 0x06);
}
devc->opened = 0;
}
static void sb_set_output_parms(int dev, unsigned long buf, int nr_bytes,
int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
devc->trg_buf = buf;
devc->trg_bytes = nr_bytes;
devc->trg_intrflag = intrflag;
devc->irq_mode = IMODE_OUTPUT;
}
static void sb_set_input_parms(int dev, unsigned long buf, int count, int intrflag)
{
sb_devc *devc = audio_devs[dev]->devc;
devc->trg_buf = buf;
devc->trg_bytes = count;
devc->trg_intrflag = intrflag;
devc->irq_mode = IMODE_INPUT;
}
/*
* SB1.x compatible routines
*/
static void sb1_audio_output_block(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
unsigned long flags;
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_OUTPUT;
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x14)) /* 8 bit DAC using DMA */
{
sb_dsp_command(devc, (unsigned char) (count & 0xff));
sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
}
else
printk(KERN_WARNING "soundblaster: Unable to start DAC\n");
restore_flags(flags);
devc->intr_active = 1;
}
static void sb1_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
unsigned long flags;
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
/*
* Start a DMA input to the buffer pointed by dmaqtail
*/
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_INPUT;
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x24)) /* 8 bit ADC using DMA */
{
sb_dsp_command(devc, (unsigned char) (count & 0xff));
sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
}
else
printk(KERN_ERR "soundblaster: Unable to start ADC\n");
restore_flags(flags);
devc->intr_active = 1;
}
static void sb1_audio_trigger(int dev, int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
bits &= devc->irq_mode;
if (!bits)
sb_dsp_command(devc, 0xd0); /* Halt DMA */
else
{
switch (devc->irq_mode)
{
case IMODE_INPUT:
sb1_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
case IMODE_OUTPUT:
sb1_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
}
}
devc->trigger_bits = bits;
}
static int sb1_audio_prepare_for_input(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
unsigned long flags;
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x40))
sb_dsp_command(devc, devc->tconst);
sb_dsp_command(devc, DSP_CMD_SPKOFF);
restore_flags(flags);
devc->trigger_bits = 0;
return 0;
}
static int sb1_audio_prepare_for_output(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
unsigned long flags;
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x40))
sb_dsp_command(devc, devc->tconst);
sb_dsp_command(devc, DSP_CMD_SPKON);
restore_flags(flags);
devc->trigger_bits = 0;
return 0;
}
static int sb1_audio_set_speed(int dev, int speed)
{
int max_speed = 23000;
sb_devc *devc = audio_devs[dev]->devc;
int tmp;
if (devc->opened & OPEN_READ)
max_speed = 13000;
if (speed > 0)
{
if (speed < 4000)
speed = 4000;
if (speed > max_speed)
speed = max_speed;
devc->tconst = (256 - ((1000000 + speed / 2) / speed)) & 0xff;
tmp = 256 - devc->tconst;
speed = (1000000 + tmp / 2) / tmp;
devc->speed = speed;
}
return devc->speed;
}
static short sb1_audio_set_channels(int dev, short channels)
{
sb_devc *devc = audio_devs[dev]->devc;
return devc->channels = 1;
}
static unsigned int sb1_audio_set_bits(int dev, unsigned int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
return devc->bits = 8;
}
static void sb1_audio_halt_xfer(int dev)
{
unsigned long flags;
sb_devc *devc = audio_devs[dev]->devc;
save_flags(flags);
cli();
sb_dsp_reset(devc);
restore_flags(flags);
}
/*
* SB 2.0 and SB 2.01 compatible routines
*/
static void sb20_audio_output_block(int dev, unsigned long buf, int nr_bytes,
int intrflag)
{
unsigned long flags;
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
unsigned char cmd;
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_OUTPUT;
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x48)) /* DSP Block size */
{
sb_dsp_command(devc, (unsigned char) (count & 0xff));
sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
if (devc->speed * devc->channels <= 23000)
cmd = 0x1c; /* 8 bit PCM output */
else
cmd = 0x90; /* 8 bit high speed PCM output (SB2.01/Pro) */
if (!sb_dsp_command(devc, cmd))
printk(KERN_ERR "soundblaster: Unable to start DAC\n");
}
else
printk(KERN_ERR "soundblaster: Unable to start DAC\n");
restore_flags(flags);
devc->intr_active = 1;
}
static void sb20_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
unsigned long flags;
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
unsigned char cmd;
/*
* Start a DMA input to the buffer pointed by dmaqtail
*/
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_INPUT;
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x48)) /* DSP Block size */
{
sb_dsp_command(devc, (unsigned char) (count & 0xff));
sb_dsp_command(devc, (unsigned char) ((count >> 8) & 0xff));
if (devc->speed * devc->channels <= (devc->major == 3 ? 23000 : 13000))
cmd = 0x2c; /* 8 bit PCM input */
else
cmd = 0x98; /* 8 bit high speed PCM input (SB2.01/Pro) */
if (!sb_dsp_command(devc, cmd))
printk(KERN_ERR "soundblaster: Unable to start ADC\n");
}
else
printk(KERN_ERR "soundblaster: Unable to start ADC\n");
restore_flags(flags);
devc->intr_active = 1;
}
static void sb20_audio_trigger(int dev, int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
bits &= devc->irq_mode;
if (!bits)
sb_dsp_command(devc, 0xd0); /* Halt DMA */
else
{
switch (devc->irq_mode)
{
case IMODE_INPUT:
sb20_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
case IMODE_OUTPUT:
sb20_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
}
}
devc->trigger_bits = bits;
}
/*
* SB2.01 specific speed setup
*/
static int sb201_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
int tmp;
int s = speed * devc->channels;
if (speed > 0)
{
if (speed < 4000)
speed = 4000;
if (speed > 44100)
speed = 44100;
if (devc->opened & OPEN_READ && speed > 15000)
speed = 15000;
devc->tconst = ((65536 - ((256000000 + s / 2) / s)) >> 8) & 0xff;
tmp = 256 - devc->tconst;
speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
devc->speed = speed;
}
return devc->speed;
}
/*
* SB Pro specific routines
*/
static int sbpro_audio_prepare_for_input(int dev, int bsize, int bcount)
{ /* For SB Pro and Jazz16 */
sb_devc *devc = audio_devs[dev]->devc;
unsigned long flags;
unsigned char bits = 0;
if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma =
devc->bits == 16 ? devc->dma16 : devc->dma8;
if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
if (devc->bits == AFMT_S16_LE)
bits = 0x04; /* 16 bit mode */
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x40))
sb_dsp_command(devc, devc->tconst);
sb_dsp_command(devc, DSP_CMD_SPKOFF);
if (devc->channels == 1)
sb_dsp_command(devc, 0xa0 | bits); /* Mono input */
else
sb_dsp_command(devc, 0xa8 | bits); /* Stereo input */
restore_flags(flags);
devc->trigger_bits = 0;
return 0;
}
static int sbpro_audio_prepare_for_output(int dev, int bsize, int bcount)
{ /* For SB Pro and Jazz16 */
sb_devc *devc = audio_devs[dev]->devc;
unsigned long flags;
unsigned char tmp;
unsigned char bits = 0;
if (devc->dma16 >= 0 && devc->dma16 != devc->dma8)
audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma = devc->bits == 16 ? devc->dma16 : devc->dma8;
if (devc->model == MDL_SBPRO)
sb_mixer_set_stereo(devc, devc->channels == 2);
save_flags(flags);
cli();
if (sb_dsp_command(devc, 0x40))
sb_dsp_command(devc, devc->tconst);
sb_dsp_command(devc, DSP_CMD_SPKON);
if (devc->model == MDL_JAZZ || devc->model == MDL_SMW)
{
if (devc->bits == AFMT_S16_LE)
bits = 0x04; /* 16 bit mode */
if (devc->channels == 1)
sb_dsp_command(devc, 0xa0 | bits); /* Mono output */
else
sb_dsp_command(devc, 0xa8 | bits); /* Stereo output */
}
else
{
tmp = sb_getmixer(devc, 0x0e);
if (devc->channels == 1)
tmp &= ~0x02;
else
tmp |= 0x02;
sb_setmixer(devc, 0x0e, tmp);
}
restore_flags(flags);
devc->trigger_bits = 0;
return 0;
}
static int sbpro_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
if (speed > 0)
{
if (speed < 4000)
speed = 4000;
if (speed > 44100)
speed = 44100;
if (devc->channels > 1 && speed > 22050)
speed = 22050;
sb201_audio_set_speed(dev, speed);
}
return devc->speed;
}
static short sbpro_audio_set_channels(int dev, short channels)
{
sb_devc *devc = audio_devs[dev]->devc;
if (channels == 1 || channels == 2)
{
if (channels != devc->channels)
{
devc->channels = channels;
if (devc->model == MDL_SBPRO && devc->channels == 2)
sbpro_audio_set_speed(dev, devc->speed);
}
}
return devc->channels;
}
static int jazz16_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
if (speed > 0)
{
int tmp;
int s = speed * devc->channels;
if (speed < 5000)
speed = 5000;
if (speed > 44100)
speed = 44100;
devc->tconst = ((65536 - ((256000000 + s / 2) / s)) >> 8) & 0xff;
tmp = 256 - devc->tconst;
speed = ((1000000 + tmp / 2) / tmp) / devc->channels;
devc->speed = speed;
}
return devc->speed;
}
/*
* ESS specific routines
*/
static int ess_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
int divider;
if (speed > 0)
{
if (speed < 5000)
speed = 5000;
if (speed > 48000)
speed = 48000;
if (speed > 22000)
{
divider = (795500 + speed / 2) / speed;
speed = (795500 + divider / 2) / divider;
}
else
{
divider = (397700 + speed / 2) / speed;
speed = (397700 + divider / 2) / divider;
}
devc->speed = speed;
}
return devc->speed;
}
static void ess_speed(sb_devc * devc)
{
int divider;
unsigned char bits = 0;
int speed = devc->speed;
if (speed < 4000)
speed = 4000;
else if (speed > 48000)
speed = 48000;
if (speed > 22000)
{
bits = 0x80;
divider = 256 - (795500 + speed / 2) / speed;
}
else
{
divider = 128 - (397700 + speed / 2) / speed;
}
bits |= (unsigned char) divider;
ess_write(devc, 0xa1, bits);
/*
* Set filter divider register
*/
speed = (speed * 9) / 20; /* Set filter roll-off to 90% of speed/2 */
divider = 256 - 7160000 / (speed * 82);
ess_write(devc, 0xa2, divider);
return;
}
static int ess_audio_prepare_for_input(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
ess_speed(devc);
sb_dsp_command(devc, DSP_CMD_SPKOFF);
ess_write(devc, 0xb8, 0x0e); /* Auto init DMA mode */
ess_write(devc, 0xa8, (ess_read(devc, 0xa8) & ~0x03) | (3 - devc->channels)); /* Mono/stereo */
ess_write(devc, 0xb9, 2); /* Demand mode (4 bytes/DMA request) */
if (devc->channels == 1)
{
if (devc->bits == AFMT_U8)
{
/* 8 bit mono */
ess_write(devc, 0xb7, 0x51);
ess_write(devc, 0xb7, 0xd0);
}
else
{
/* 16 bit mono */
ess_write(devc, 0xb7, 0x71);
ess_write(devc, 0xb7, 0xf4);
}
}
else
{
/* Stereo */
if (devc->bits == AFMT_U8)
{
/* 8 bit stereo */
ess_write(devc, 0xb7, 0x51);
ess_write(devc, 0xb7, 0x98);
}
else
{
/* 16 bit stereo */
ess_write(devc, 0xb7, 0x71);
ess_write(devc, 0xb7, 0xbc);
}
}
ess_write(devc, 0xb1, (ess_read(devc, 0xb1) & 0x0f) | 0x50);
ess_write(devc, 0xb2, (ess_read(devc, 0xb2) & 0x0f) | 0x50);
devc->trigger_bits = 0;
return 0;
}
static int ess_audio_prepare_for_output(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
sb_dsp_reset(devc);
ess_speed(devc);
ess_write(devc, 0xb8, 4); /* Auto init DMA mode */
ess_write(devc, 0xa8, (ess_read(devc, 0xa8) & ~0x03) | (3 - devc->channels)); /* Mono/stereo */
ess_write(devc, 0xb9, 2); /* Demand mode (4 bytes/request) */
if (devc->channels == 1)
{
if (devc->bits == AFMT_U8)
{ /* 8 bit mono */
ess_write(devc, 0xb6, 0x80);
ess_write(devc, 0xb7, 0x51);
ess_write(devc, 0xb7, 0xd0);
}
else
{ /* 16 bit mono */
ess_write(devc, 0xb6, 0x00);
ess_write(devc, 0xb7, 0x71);
ess_write(devc, 0xb7, 0xf4);
}
}
else
{ /* Stereo */
if (devc->bits == AFMT_U8)
{ /* 8 bit stereo */
ess_write(devc, 0xb6, 0x80);
ess_write(devc, 0xb7, 0x51);
ess_write(devc, 0xb7, 0x98);
}
else
{ /* 16 bit stereo */
ess_write(devc, 0xb6, 0x00);
ess_write(devc, 0xb7, 0x71);
ess_write(devc, 0xb7, 0xbc);
}
}
ess_write(devc, 0xb1, (ess_read(devc, 0xb1) & 0x0f) | 0x50);
ess_write(devc, 0xb2, (ess_read(devc, 0xb2) & 0x0f) | 0x50);
sb_dsp_command(devc, DSP_CMD_SPKON);
devc->trigger_bits = 0;
return 0;
}
static void ess_audio_output_block(int dev, unsigned long buf, int nr_bytes,
int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_OUTPUT;
ess_write(devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
ess_write(devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_write(devc, 0xb8, ess_read(devc, 0xb8) | 0x05); /* Go */
devc->intr_active = 1;
}
static void ess_audio_start_input(int dev, unsigned long buf, int nr_bytes, int intrflag)
{
int count = nr_bytes;
sb_devc *devc = audio_devs[dev]->devc;
short c = -nr_bytes;
/*
* Start a DMA input to the buffer pointed by dmaqtail
*/
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
if (audio_devs[dev]->dmap_out->dma > 3)
count >>= 1;
count--;
devc->irq_mode = IMODE_INPUT;
ess_write(devc, 0xa4, (unsigned char) ((unsigned short) c & 0xff));
ess_write(devc, 0xa5, (unsigned char) (((unsigned short) c >> 8) & 0xff));
ess_write(devc, 0xb8, ess_read(devc, 0xb8) | 0x0f); /* Go */
devc->intr_active = 1;
}
static void ess_audio_trigger(int dev, int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
bits &= devc->irq_mode;
if (!bits)
sb_dsp_command(devc, 0xd0); /* Halt DMA */
else
{
switch (devc->irq_mode)
{
case IMODE_INPUT:
ess_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
case IMODE_OUTPUT:
ess_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
}
}
devc->trigger_bits = bits;
}
/*
* SB16 specific routines
*/
static int sb16_audio_set_speed(int dev, int speed)
{
sb_devc *devc = audio_devs[dev]->devc;
if (speed > 0)
{
if (speed < 5000)
speed = 4000;
if (speed > 44100)
speed = 44100;
devc->speed = speed;
}
return devc->speed;
}
static unsigned int sb16_audio_set_bits(int dev, unsigned int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
if (bits != 0)
{
if (bits == AFMT_U8 || bits == AFMT_S16_LE)
devc->bits = bits;
else
devc->bits = AFMT_U8;
}
return devc->bits;
}
static int sb16_audio_prepare_for_input(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
audio_devs[dev]->dmap_out->dma =
audio_devs[dev]->dmap_in->dma =
devc->bits == AFMT_S16_LE ? devc->dma16 : devc->dma8;
devc->trigger_bits = 0;
return 0;
}
static int sb16_audio_prepare_for_output(int dev, int bsize, int bcount)
{
sb_devc *devc = audio_devs[dev]->devc;
audio_devs[dev]->dmap_out->dma = audio_devs[dev]->dmap_in->dma =
devc->bits == AFMT_S16_LE ? devc->dma16 : devc->dma8;
devc->trigger_bits = 0;
return 0;
}
static void sb16_audio_output_block(int dev, unsigned long buf, int count,
int intrflag)
{
unsigned long flags, cnt;
sb_devc *devc = audio_devs[dev]->devc;
devc->irq_mode = IMODE_OUTPUT;
devc->intr_active = 1;
cnt = count;
if (devc->bits == AFMT_S16_LE)
cnt >>= 1;
cnt--;
save_flags(flags);
cli();
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
sb_dsp_command(devc, 0x41);
sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xb6 : 0xc6));
sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
(devc->bits == AFMT_S16_LE ? 0x10 : 0)));
sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
sb_dsp_command(devc, (unsigned char) (cnt >> 8));
restore_flags(flags);
}
static void sb16_audio_start_input(int dev, unsigned long buf, int count, int intrflag)
{
unsigned long flags, cnt;
sb_devc *devc = audio_devs[dev]->devc;
devc->irq_mode = IMODE_INPUT;
devc->intr_active = 1;
cnt = count;
if (devc->bits == AFMT_S16_LE)
cnt >>= 1;
cnt--;
save_flags(flags);
cli();
/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
sb_dsp_command(devc, 0x42);
sb_dsp_command(devc, (unsigned char) ((devc->speed >> 8) & 0xff));
sb_dsp_command(devc, (unsigned char) (devc->speed & 0xff));
sb_dsp_command(devc, (devc->bits == AFMT_S16_LE ? 0xbe : 0xce));
sb_dsp_command(devc, ((devc->channels == 2 ? 0x20 : 0) +
(devc->bits == AFMT_S16_LE ? 0x10 : 0)));
sb_dsp_command(devc, (unsigned char) (cnt & 0xff));
sb_dsp_command(devc, (unsigned char) (cnt >> 8));
restore_flags(flags);
}
static void sb16_audio_trigger(int dev, int bits)
{
sb_devc *devc = audio_devs[dev]->devc;
bits &= devc->irq_mode;
if (!bits)
sb_dsp_command(devc, 0xd0); /* Halt DMA */
else
{
switch (devc->irq_mode)
{
case IMODE_INPUT:
sb16_audio_start_input(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
case IMODE_OUTPUT:
sb16_audio_output_block(dev, devc->trg_buf, devc->trg_bytes,
devc->trg_intrflag);
break;
}
}
devc->trigger_bits = bits;
}
static struct audio_driver sb1_audio_driver = /* SB1.x */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL, /* ioctl */
sb1_audio_prepare_for_input,
sb1_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
sb1_audio_trigger,
sb1_audio_set_speed,
sb1_audio_set_bits,
sb1_audio_set_channels
};
static struct audio_driver sb20_audio_driver = /* SB2.0 */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL,
sb1_audio_prepare_for_input,
sb1_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
sb20_audio_trigger,
sb1_audio_set_speed,
sb1_audio_set_bits,
sb1_audio_set_channels
};
static struct audio_driver sb201_audio_driver = /* SB2.01 */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL,
sb1_audio_prepare_for_input,
sb1_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
sb20_audio_trigger,
sb201_audio_set_speed,
sb1_audio_set_bits,
sb1_audio_set_channels
};
static struct audio_driver sbpro_audio_driver = /* SB Pro */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL,
sbpro_audio_prepare_for_input,
sbpro_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
sb20_audio_trigger,
sbpro_audio_set_speed,
sb1_audio_set_bits,
sbpro_audio_set_channels
};
static struct audio_driver jazz16_audio_driver = /* Jazz16 and SM Wave */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL,
sbpro_audio_prepare_for_input,
sbpro_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
sb20_audio_trigger,
jazz16_audio_set_speed,
sb16_audio_set_bits,
sbpro_audio_set_channels
};
static struct audio_driver sb16_audio_driver = /* SB16 */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL,
sb16_audio_prepare_for_input,
sb16_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
sb16_audio_trigger,
sb16_audio_set_speed,
sb16_audio_set_bits,
sbpro_audio_set_channels
};
static struct audio_driver ess_audio_driver = /* ESS ES688/1688 */
{
sb_audio_open,
sb_audio_close,
sb_set_output_parms,
sb_set_input_parms,
NULL,
ess_audio_prepare_for_input,
ess_audio_prepare_for_output,
sb1_audio_halt_xfer,
NULL, /* local_qlen */
NULL, /* copy_from_user */
NULL,
NULL,
ess_audio_trigger,
ess_audio_set_speed,
sb16_audio_set_bits,
sbpro_audio_set_channels
};
void sb_audio_init(sb_devc * devc, char *name)
{
int audio_flags = 0;
int format_mask = AFMT_U8;
struct audio_driver *driver = &sb1_audio_driver;
switch (devc->model)
{
case MDL_SB1: /* SB1.0 or SB 1.5 */
DDB(printk("Will use standard SB1.x driver\n"));
audio_flags = DMA_HARDSTOP;
break;
case MDL_SB2:
DDB(printk("Will use SB2.0 driver\n"));
audio_flags = DMA_AUTOMODE;
driver = &sb20_audio_driver;
break;
case MDL_SB201:
DDB(printk("Will use SB2.01 (high speed) driver\n"));
audio_flags = DMA_AUTOMODE;
driver = &sb201_audio_driver;
break;
case MDL_JAZZ:
case MDL_SMW:
DDB(printk("Will use Jazz16 driver\n"));
audio_flags = DMA_AUTOMODE;
format_mask |= AFMT_S16_LE;
driver = &jazz16_audio_driver;
break;
case MDL_ESS:
DDB(printk("Will use ESS ES688/1688 driver\n"));
audio_flags = DMA_AUTOMODE;
format_mask |= AFMT_S16_LE;
driver = &ess_audio_driver;
break;
case MDL_SB16:
DDB(printk("Will use SB16 driver\n"));
audio_flags = DMA_AUTOMODE;
format_mask |= AFMT_S16_LE;
driver = &sb16_audio_driver;
break;
default:
DDB(printk("Will use SB Pro driver\n"));
audio_flags = DMA_AUTOMODE;
driver = &sbpro_audio_driver;
}
if ((devc->my_dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
name,driver, sizeof(struct audio_driver),
audio_flags, format_mask, devc,
devc->dma8, devc->dma8)) < 0)
{
printk(KERN_ERR "sb: unable to install audio.\n");
return;
}
audio_devs[devc->my_dev]->mixer_dev = devc->my_mixerdev;
audio_devs[devc->my_dev]->min_fragment = 5;
}
#endif
