diff options
Diffstat (limited to 'sound/oss/sb_audio.c')
| -rw-r--r-- | sound/oss/sb_audio.c | 1101 |
1 files changed, 1101 insertions, 0 deletions
diff --git a/sound/oss/sb_audio.c b/sound/oss/sb_audio.c new file mode 100644 index 000000000..048439a16 --- /dev/null +++ b/sound/oss/sb_audio.c @@ -0,0 +1,1101 @@ +/* + * sound/oss/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. Weird uart bug causing irq storms + * + * Daniel J. Rodriksson: Changes to make sb16 work full duplex. + * Maybe other 16 bit cards in this code could behave + * the same. + * Chris Rankin: Use spinlocks instead of CLI/STI + */ + +#include <linux/spinlock.h> + +#include "sound_config.h" + +#include "sb_mixer.h" +#include "sb.h" + +#include "sb_ess.h" + +int sb_audio_open(int dev, int mode) +{ + sb_devc *devc = audio_devs[dev]->devc; + unsigned long flags; + + if (devc == NULL) + { + printk(KERN_ERR "Sound Blaster: incomplete initialization.\n"); + return -ENXIO; + } + if (devc->caps & SB_NO_RECORDING && mode & OPEN_READ) + { + if (mode == OPEN_READ) + return -EPERM; + } + spin_lock_irqsave(&devc->lock, flags); + if (devc->opened) + { + spin_unlock_irqrestore(&devc->lock, flags); + return -EBUSY; + } + if (devc->dma16 != -1 && devc->dma16 != devc->dma8 && !devc->duplex) + { + if (sound_open_dma(devc->dma16, "Sound Blaster 16 bit")) + { + spin_unlock_irqrestore(&devc->lock, flags); + return -EBUSY; + } + } + devc->opened = mode; + spin_unlock_irqrestore(&devc->lock, flags); + + devc->irq_mode = IMODE_NONE; + devc->irq_mode_16 = IMODE_NONE; + devc->fullduplex = devc->duplex && + ((mode & OPEN_READ) && (mode & OPEN_WRITE)); + sb_dsp_reset(devc); + + /* At first glance this check isn't enough, some ESS chips might not + * have a RECLEV. However if they don't common_mixer_set will refuse + * cause devc->iomap has no register mapping for RECLEV + */ + if (devc->model == MDL_ESS) ess_mixer_reload (devc, SOUND_MIXER_RECLEV); + + /* 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; +} + +void sb_audio_close(int dev) +{ + sb_devc *devc = audio_devs[dev]->devc; + + /* fix things if mmap turned off fullduplex */ + if(devc->duplex + && !devc->fullduplex + && (devc->opened & OPEN_READ) && (devc->opened & OPEN_WRITE)) + { + struct dma_buffparms *dmap_temp; + dmap_temp = audio_devs[dev]->dmap_out; + audio_devs[dev]->dmap_out = audio_devs[dev]->dmap_in; + audio_devs[dev]->dmap_in = dmap_temp; + } + audio_devs[dev]->dmap_out->dma = devc->dma8; + audio_devs[dev]->dmap_in->dma = ( devc->duplex ) ? + devc->dma16 : devc->dma8; + + if (devc->dma16 != -1 && devc->dma16 != devc->dma8 && !devc->duplex) + 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; + + if (!devc->fullduplex || devc->bits == AFMT_S16_LE) + { + devc->trg_buf = buf; + devc->trg_bytes = nr_bytes; + devc->trg_intrflag = intrflag; + devc->irq_mode = IMODE_OUTPUT; + } + else + { + devc->trg_buf_16 = buf; + devc->trg_bytes_16 = nr_bytes; + devc->trg_intrflag_16 = intrflag; + devc->irq_mode_16 = IMODE_OUTPUT; + } +} + +static void sb_set_input_parms(int dev, unsigned long buf, int count, int intrflag) +{ + sb_devc *devc = audio_devs[dev]->devc; + + if (!devc->fullduplex || devc->bits != AFMT_S16_LE) + { + devc->trg_buf = buf; + devc->trg_bytes = count; + devc->trg_intrflag = intrflag; + devc->irq_mode = IMODE_INPUT; + } + else + { + devc->trg_buf_16 = buf; + devc->trg_bytes_16 = count; + devc->trg_intrflag_16 = intrflag; + devc->irq_mode_16 = 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; + + spin_lock_irqsave(&devc->lock, flags); + 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 "Sound Blaster: unable to start DAC.\n"); + spin_unlock_irqrestore(&devc->lock, 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; + + spin_lock_irqsave(&devc->lock, flags); + 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 "Sound Blaster: unable to start ADC.\n"); + spin_unlock_irqrestore(&devc->lock, 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; + + spin_lock_irqsave(&devc->lock, flags); + if (sb_dsp_command(devc, 0x40)) + sb_dsp_command(devc, devc->tconst); + sb_dsp_command(devc, DSP_CMD_SPKOFF); + spin_unlock_irqrestore(&devc->lock, 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; + + spin_lock_irqsave(&devc->lock, flags); + if (sb_dsp_command(devc, 0x40)) + sb_dsp_command(devc, devc->tconst); + sb_dsp_command(devc, DSP_CMD_SPKON); + spin_unlock_irqrestore(&devc->lock, 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; + + spin_lock_irqsave(&devc->lock, flags); + sb_dsp_reset(devc); + spin_unlock_irqrestore(&devc->lock, 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; + + spin_lock_irqsave(&devc->lock, flags); + 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 "Sound Blaster: unable to start DAC.\n"); + } + else + printk(KERN_ERR "Sound Blaster: unable to start DAC.\n"); + spin_unlock_irqrestore(&devc->lock, 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; + + spin_lock_irqsave(&devc->lock, flags); + 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 "Sound Blaster: unable to start ADC.\n"); + } + else + printk(KERN_ERR "Sound Blaster: unable to start ADC.\n"); + spin_unlock_irqrestore(&devc->lock, 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; + + if (speed > 0) + { + if (speed < 4000) + speed = 4000; + if (speed > 44100) + speed = 44100; + if (devc->opened & OPEN_READ && speed > 15000) + speed = 15000; + s = speed * devc->channels; + devc->tconst = (256 - ((1000000 + s / 2) / s)) & 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 */ + + spin_lock_irqsave(&devc->lock, flags); + 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 */ + spin_unlock_irqrestore(&devc->lock, 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); + + spin_lock_irqsave(&devc->lock, flags); + 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 */ + spin_unlock_irqrestore(&devc->lock, flags); + } + else + { + spin_unlock_irqrestore(&devc->lock, flags); + tmp = sb_getmixer(devc, 0x0e); + if (devc->channels == 1) + tmp &= ~0x02; + else + tmp |= 0x02; + sb_setmixer(devc, 0x0e, tmp); + } + 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; + + if (speed < 5000) + speed = 5000; + if (speed > 44100) + speed = 44100; + + s = speed * devc->channels; + + devc->tconst = (256 - ((1000000 + s / 2) / s)) & 0xff; + + tmp = 256 - devc->tconst; + speed = ((1000000 + tmp / 2) / tmp) / devc->channels; + + devc->speed = speed; + } + return devc->speed; +} + +/* + * SB16 specific routines + */ + +static int sb16_audio_set_speed(int dev, int speed) +{ + sb_devc *devc = audio_devs[dev]->devc; + int max_speed = devc->submodel == SUBMDL_ALS100 ? 48000 : 44100; + + if (speed > 0) + { + if (speed < 5000) + speed = 5000; + + if (speed > max_speed) + speed = max_speed; + + 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; + + if (!devc->fullduplex) + { + audio_devs[dev]->dmap_out->dma = + audio_devs[dev]->dmap_in->dma = + devc->bits == AFMT_S16_LE ? + devc->dma16 : devc->dma8; + } + else if (devc->bits == AFMT_S16_LE) + { + audio_devs[dev]->dmap_out->dma = devc->dma8; + audio_devs[dev]->dmap_in->dma = devc->dma16; + } + else + { + audio_devs[dev]->dmap_out->dma = devc->dma16; + audio_devs[dev]->dmap_in->dma = 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; + + if (!devc->fullduplex) + { + audio_devs[dev]->dmap_out->dma = + audio_devs[dev]->dmap_in->dma = + devc->bits == AFMT_S16_LE ? + devc->dma16 : devc->dma8; + } + else if (devc->bits == AFMT_S16_LE) + { + audio_devs[dev]->dmap_out->dma = devc->dma8; + audio_devs[dev]->dmap_in->dma = devc->dma16; + } + else + { + audio_devs[dev]->dmap_out->dma = devc->dma16; + audio_devs[dev]->dmap_in->dma = 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; + unsigned long bits; + + if (!devc->fullduplex || devc->bits == AFMT_S16_LE) + { + devc->irq_mode = IMODE_OUTPUT; + devc->intr_active = 1; + } + else + { + devc->irq_mode_16 = IMODE_OUTPUT; + devc->intr_active_16 = 1; + } + + /* save value */ + spin_lock_irqsave(&devc->lock, flags); + bits = devc->bits; + if (devc->fullduplex) + devc->bits = (devc->bits == AFMT_S16_LE) ? + AFMT_U8 : AFMT_S16_LE; + spin_unlock_irqrestore(&devc->lock, flags); + + cnt = count; + if (devc->bits == AFMT_S16_LE) + cnt >>= 1; + cnt--; + + spin_lock_irqsave(&devc->lock, flags); + + /* 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 real value after all programming */ + devc->bits = bits; + spin_unlock_irqrestore(&devc->lock, flags); +} + + +/* + * This fails on the Cyrix MediaGX. If you don't have the DMA enabled + * before the first sample arrives it locks up. However even if you + * do enable the DMA in time you just get DMA timeouts and missing + * interrupts and stuff, so for now I've not bothered fixing this either. + */ + +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; + + if (!devc->fullduplex || devc->bits != AFMT_S16_LE) + { + devc->irq_mode = IMODE_INPUT; + devc->intr_active = 1; + } + else + { + devc->irq_mode_16 = IMODE_INPUT; + devc->intr_active_16 = 1; + } + + cnt = count; + if (devc->bits == AFMT_S16_LE) + cnt >>= 1; + cnt--; + + spin_lock_irqsave(&devc->lock, flags); + + /* 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)); + + spin_unlock_irqrestore(&devc->lock, flags); +} + +static void sb16_audio_trigger(int dev, int bits) +{ + sb_devc *devc = audio_devs[dev]->devc; + + int bits_16 = bits & devc->irq_mode_16; + bits &= devc->irq_mode; + + if (!bits && !bits_16) + sb_dsp_command(devc, 0xd0); /* Halt DMA */ + else + { + if (bits) + { + 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; + } + } + if (bits_16) + { + switch (devc->irq_mode_16) + { + case IMODE_INPUT: + sb16_audio_start_input(dev, + devc->trg_buf_16, + devc->trg_bytes_16, + devc->trg_intrflag_16); + break; + + case IMODE_OUTPUT: + sb16_audio_output_block(dev, + devc->trg_buf_16, + devc->trg_bytes_16, + devc->trg_intrflag_16); + break; + } + } + } + + devc->trigger_bits = bits | bits_16; +} + +static unsigned char lbuf8[2048]; +static signed short *lbuf16 = (signed short *)lbuf8; +#define LBUFCOPYSIZE 1024 +static void +sb16_copy_from_user(int dev, + char *localbuf, int localoffs, + const char __user *userbuf, int useroffs, + int max_in, int max_out, + int *used, int *returned, + int len) +{ + sb_devc *devc = audio_devs[dev]->devc; + int i, c, p, locallen; + unsigned char *buf8; + signed short *buf16; + + /* if not duplex no conversion */ + if (!devc->fullduplex) + { + if (copy_from_user(localbuf + localoffs, + userbuf + useroffs, len)) + return; + *used = len; + *returned = len; + } + else if (devc->bits == AFMT_S16_LE) + { + /* 16 -> 8 */ + /* max_in >> 1, max number of samples in ( 16 bits ) */ + /* max_out, max number of samples out ( 8 bits ) */ + /* len, number of samples that will be taken ( 16 bits )*/ + /* c, count of samples remaining in buffer ( 16 bits )*/ + /* p, count of samples already processed ( 16 bits )*/ + len = ( (max_in >> 1) > max_out) ? max_out : (max_in >> 1); + c = len; + p = 0; + buf8 = (unsigned char *)(localbuf + localoffs); + while (c) + { + locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c); + /* << 1 in order to get 16 bit samples */ + if (copy_from_user(lbuf16, + userbuf + useroffs + (p << 1), + locallen << 1)) + return; + for (i = 0; i < locallen; i++) + { + buf8[p+i] = ~((lbuf16[i] >> 8) & 0xff) ^ 0x80; + } + c -= locallen; p += locallen; + } + /* used = ( samples * 16 bits size ) */ + *used = max_in > ( max_out << 1) ? (max_out << 1) : max_in; + /* returned = ( samples * 8 bits size ) */ + *returned = len; + } + else + { + /* 8 -> 16 */ + /* max_in, max number of samples in ( 8 bits ) */ + /* max_out >> 1, max number of samples out ( 16 bits ) */ + /* len, number of samples that will be taken ( 8 bits )*/ + /* c, count of samples remaining in buffer ( 8 bits )*/ + /* p, count of samples already processed ( 8 bits )*/ + len = max_in > (max_out >> 1) ? (max_out >> 1) : max_in; + c = len; + p = 0; + buf16 = (signed short *)(localbuf + localoffs); + while (c) + { + locallen = (c >= LBUFCOPYSIZE ? LBUFCOPYSIZE : c); + if (copy_from_user(lbuf8, + userbuf+useroffs + p, + locallen)) + return; + for (i = 0; i < locallen; i++) + { + buf16[p+i] = (~lbuf8[i] ^ 0x80) << 8; + } + c -= locallen; p += locallen; + } + /* used = ( samples * 8 bits size ) */ + *used = len; + /* returned = ( samples * 16 bits size ) */ + *returned = len << 1; + } +} + +static void +sb16_audio_mmap(int dev) +{ + sb_devc *devc = audio_devs[dev]->devc; + devc->fullduplex = 0; +} + +static struct audio_driver sb1_audio_driver = /* SB1.x */ +{ + .owner = THIS_MODULE, + .open = sb_audio_open, + .close = sb_audio_close, + .output_block = sb_set_output_parms, + .start_input = sb_set_input_parms, + .prepare_for_input = sb1_audio_prepare_for_input, + .prepare_for_output = sb1_audio_prepare_for_output, + .halt_io = sb1_audio_halt_xfer, + .trigger = sb1_audio_trigger, + .set_speed = sb1_audio_set_speed, + .set_bits = sb1_audio_set_bits, + .set_channels = sb1_audio_set_channels +}; + +static struct audio_driver sb20_audio_driver = /* SB2.0 */ +{ + .owner = THIS_MODULE, + .open = sb_audio_open, + .close = sb_audio_close, + .output_block = sb_set_output_parms, + .start_input = sb_set_input_parms, + .prepare_for_input = sb1_audio_prepare_for_input, + .prepare_for_output = sb1_audio_prepare_for_output, + .halt_io = sb1_audio_halt_xfer, + .trigger = sb20_audio_trigger, + .set_speed = sb1_audio_set_speed, + .set_bits = sb1_audio_set_bits, + .set_channels = sb1_audio_set_channels +}; + +static struct audio_driver sb201_audio_driver = /* SB2.01 */ +{ + .owner = THIS_MODULE, + .open = sb_audio_open, + .close = sb_audio_close, + .output_block = sb_set_output_parms, + .start_input = sb_set_input_parms, + .prepare_for_input = sb1_audio_prepare_for_input, + .prepare_for_output = sb1_audio_prepare_for_output, + .halt_io = sb1_audio_halt_xfer, + .trigger = sb20_audio_trigger, + .set_speed = sb201_audio_set_speed, + .set_bits = sb1_audio_set_bits, + .set_channels = sb1_audio_set_channels +}; + +static struct audio_driver sbpro_audio_driver = /* SB Pro */ +{ + .owner = THIS_MODULE, + .open = sb_audio_open, + .close = sb_audio_close, + .output_block = sb_set_output_parms, + .start_input = sb_set_input_parms, + .prepare_for_input = sbpro_audio_prepare_for_input, + .prepare_for_output = sbpro_audio_prepare_for_output, + .halt_io = sb1_audio_halt_xfer, + .trigger = sb20_audio_trigger, + .set_speed = sbpro_audio_set_speed, + .set_bits = sb1_audio_set_bits, + .set_channels = sbpro_audio_set_channels +}; + +static struct audio_driver jazz16_audio_driver = /* Jazz16 and SM Wave */ +{ + .owner = THIS_MODULE, + .open = sb_audio_open, + .close = sb_audio_close, + .output_block = sb_set_output_parms, + .start_input = sb_set_input_parms, + .prepare_for_input = sbpro_audio_prepare_for_input, + .prepare_for_output = sbpro_audio_prepare_for_output, + .halt_io = sb1_audio_halt_xfer, + .trigger = sb20_audio_trigger, + .set_speed = jazz16_audio_set_speed, + .set_bits = sb16_audio_set_bits, + .set_channels = sbpro_audio_set_channels +}; + +static struct audio_driver sb16_audio_driver = /* SB16 */ +{ + .owner = THIS_MODULE, + .open = sb_audio_open, + .close = sb_audio_close, + .output_block = sb_set_output_parms, + .start_input = sb_set_input_parms, + .prepare_for_input = sb16_audio_prepare_for_input, + .prepare_for_output = sb16_audio_prepare_for_output, + .halt_io = sb1_audio_halt_xfer, + .copy_user = sb16_copy_from_user, + .trigger = sb16_audio_trigger, + .set_speed = sb16_audio_set_speed, + .set_bits = sb16_audio_set_bits, + .set_channels = sbpro_audio_set_channels, + .mmap = sb16_audio_mmap +}; + +void sb_audio_init(sb_devc * devc, char *name, struct module *owner) +{ + 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")); + driver = ess_audio_init (devc, &audio_flags, &format_mask); + break; + + case MDL_SB16: + DDB(printk("Will use SB16 driver\n")); + audio_flags = DMA_AUTOMODE; + format_mask |= AFMT_S16_LE; + if (devc->dma8 != devc->dma16 && devc->dma16 != -1) + { + audio_flags |= DMA_DUPLEX; + devc->duplex = 1; + } + driver = &sb16_audio_driver; + break; + + default: + DDB(printk("Will use SB Pro driver\n")); + audio_flags = DMA_AUTOMODE; + driver = &sbpro_audio_driver; + } + + if (owner) + driver->owner = owner; + + if ((devc->dev = sound_install_audiodrv(AUDIO_DRIVER_VERSION, + name,driver, sizeof(struct audio_driver), + audio_flags, format_mask, devc, + devc->dma8, + devc->duplex ? devc->dma16 : devc->dma8)) < 0) + { + printk(KERN_ERR "Sound Blaster: unable to install audio.\n"); + return; + } + audio_devs[devc->dev]->mixer_dev = devc->my_mixerdev; + audio_devs[devc->dev]->min_fragment = 5; +} |