| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
| * Uros Bizjak <uros@kss-loka.si> |
| * |
| * Routines for control of 8-bit SoundBlaster cards and clones |
| * Please note: I don't have access to old SB8 soundcards. |
| * |
| * -- |
| * |
| * Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk> |
| * DSP can't respond to commands whilst in "high speed" mode. Caused |
| * glitching during playback. Fixed. |
| * |
| * Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si> |
| * Cleaned up and rewrote lowlevel routines. |
| */ |
| |
| #include <linux/io.h> |
| #include <asm/dma.h> |
| #include <linux/init.h> |
| #include <linux/time.h> |
| #include <linux/module.h> |
| #include <sound/core.h> |
| #include <sound/sb.h> |
| |
| MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>"); |
| MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones"); |
| MODULE_LICENSE("GPL"); |
| |
| #define SB8_CLOCK 1000000 |
| #define SB8_DEN(v) ((SB8_CLOCK + (v) / 2) / (v)) |
| #define SB8_RATE(v) (SB8_CLOCK / SB8_DEN(v)) |
| |
| static const struct snd_ratnum clock = { |
| .num = SB8_CLOCK, |
| .den_min = 1, |
| .den_max = 256, |
| .den_step = 1, |
| }; |
| |
| static const struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = { |
| .nrats = 1, |
| .rats = &clock, |
| }; |
| |
| static const struct snd_ratnum stereo_clocks[] = { |
| { |
| .num = SB8_CLOCK, |
| .den_min = SB8_DEN(22050), |
| .den_max = SB8_DEN(22050), |
| .den_step = 1, |
| }, |
| { |
| .num = SB8_CLOCK, |
| .den_min = SB8_DEN(11025), |
| .den_max = SB8_DEN(11025), |
| .den_step = 1, |
| } |
| }; |
| |
| static int snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
| if (c->min > 1) { |
| unsigned int num = 0, den = 0; |
| int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE), |
| 2, stereo_clocks, &num, &den); |
| if (err >= 0 && den) { |
| params->rate_num = num; |
| params->rate_den = den; |
| } |
| return err; |
| } |
| return 0; |
| } |
| |
| static int snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params *params, |
| struct snd_pcm_hw_rule *rule) |
| { |
| struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
| if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) { |
| struct snd_interval t = { .min = 1, .max = 1 }; |
| return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t); |
| } |
| return 0; |
| } |
| |
| static int snd_sb8_playback_prepare(struct snd_pcm_substream *substream) |
| { |
| unsigned long flags; |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| unsigned int mixreg, rate, size, count; |
| unsigned char format; |
| unsigned char stereo = runtime->channels > 1; |
| int dma; |
| |
| rate = runtime->rate; |
| switch (chip->hardware) { |
| case SB_HW_JAZZ16: |
| if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) { |
| if (chip->mode & SB_MODE_CAPTURE_16) |
| return -EBUSY; |
| else |
| chip->mode |= SB_MODE_PLAYBACK_16; |
| } |
| chip->playback_format = SB_DSP_LO_OUTPUT_AUTO; |
| break; |
| case SB_HW_PRO: |
| if (runtime->channels > 1) { |
| if (snd_BUG_ON(rate != SB8_RATE(11025) && |
| rate != SB8_RATE(22050))) |
| return -EINVAL; |
| chip->playback_format = SB_DSP_HI_OUTPUT_AUTO; |
| break; |
| } |
| /* fall through */ |
| case SB_HW_201: |
| if (rate > 23000) { |
| chip->playback_format = SB_DSP_HI_OUTPUT_AUTO; |
| break; |
| } |
| /* fall through */ |
| case SB_HW_20: |
| chip->playback_format = SB_DSP_LO_OUTPUT_AUTO; |
| break; |
| case SB_HW_10: |
| chip->playback_format = SB_DSP_OUTPUT; |
| break; |
| default: |
| return -EINVAL; |
| } |
| if (chip->mode & SB_MODE_PLAYBACK_16) { |
| format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT; |
| dma = chip->dma16; |
| } else { |
| format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT; |
| chip->mode |= SB_MODE_PLAYBACK_8; |
| dma = chip->dma8; |
| } |
| size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream); |
| count = chip->p_period_size = snd_pcm_lib_period_bytes(substream); |
| spin_lock_irqsave(&chip->reg_lock, flags); |
| snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); |
| if (chip->hardware == SB_HW_JAZZ16) |
| snd_sbdsp_command(chip, format); |
| else if (stereo) { |
| /* set playback stereo mode */ |
| spin_lock(&chip->mixer_lock); |
| mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW); |
| snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02); |
| spin_unlock(&chip->mixer_lock); |
| |
| /* Soundblaster hardware programming reference guide, 3-23 */ |
| snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT); |
| runtime->dma_area[0] = 0x80; |
| snd_dma_program(dma, runtime->dma_addr, 1, DMA_MODE_WRITE); |
| /* force interrupt */ |
| snd_sbdsp_command(chip, SB_DSP_OUTPUT); |
| snd_sbdsp_command(chip, 0); |
| snd_sbdsp_command(chip, 0); |
| } |
| snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE); |
| if (stereo) { |
| snd_sbdsp_command(chip, 256 - runtime->rate_den / 2); |
| spin_lock(&chip->mixer_lock); |
| /* save output filter status and turn it off */ |
| mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT); |
| snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20); |
| spin_unlock(&chip->mixer_lock); |
| /* just use force_mode16 for temporary storate... */ |
| chip->force_mode16 = mixreg; |
| } else { |
| snd_sbdsp_command(chip, 256 - runtime->rate_den); |
| } |
| if (chip->playback_format != SB_DSP_OUTPUT) { |
| if (chip->mode & SB_MODE_PLAYBACK_16) |
| count /= 2; |
| count--; |
| snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE); |
| snd_sbdsp_command(chip, count & 0xff); |
| snd_sbdsp_command(chip, count >> 8); |
| } |
| spin_unlock_irqrestore(&chip->reg_lock, flags); |
| snd_dma_program(dma, runtime->dma_addr, |
| size, DMA_MODE_WRITE | DMA_AUTOINIT); |
| return 0; |
| } |
| |
| static int snd_sb8_playback_trigger(struct snd_pcm_substream *substream, |
| int cmd) |
| { |
| unsigned long flags; |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| unsigned int count; |
| |
| spin_lock_irqsave(&chip->reg_lock, flags); |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| snd_sbdsp_command(chip, chip->playback_format); |
| if (chip->playback_format == SB_DSP_OUTPUT) { |
| count = chip->p_period_size - 1; |
| snd_sbdsp_command(chip, count & 0xff); |
| snd_sbdsp_command(chip, count >> 8); |
| } |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| snd_sbdsp_reset(chip); |
| if (runtime->channels > 1) { |
| spin_lock(&chip->mixer_lock); |
| /* restore output filter and set hardware to mono mode */ |
| snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02); |
| spin_unlock(&chip->mixer_lock); |
| } |
| } else { |
| snd_sbdsp_command(chip, SB_DSP_DMA8_OFF); |
| } |
| snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF); |
| } |
| spin_unlock_irqrestore(&chip->reg_lock, flags); |
| return 0; |
| } |
| |
| static int snd_sb8_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *hw_params) |
| { |
| return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params)); |
| } |
| |
| static int snd_sb8_hw_free(struct snd_pcm_substream *substream) |
| { |
| snd_pcm_lib_free_pages(substream); |
| return 0; |
| } |
| |
| static int snd_sb8_capture_prepare(struct snd_pcm_substream *substream) |
| { |
| unsigned long flags; |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| unsigned int mixreg, rate, size, count; |
| unsigned char format; |
| unsigned char stereo = runtime->channels > 1; |
| int dma; |
| |
| rate = runtime->rate; |
| switch (chip->hardware) { |
| case SB_HW_JAZZ16: |
| if (runtime->format == SNDRV_PCM_FORMAT_S16_LE) { |
| if (chip->mode & SB_MODE_PLAYBACK_16) |
| return -EBUSY; |
| else |
| chip->mode |= SB_MODE_CAPTURE_16; |
| } |
| chip->capture_format = SB_DSP_LO_INPUT_AUTO; |
| break; |
| case SB_HW_PRO: |
| if (runtime->channels > 1) { |
| if (snd_BUG_ON(rate != SB8_RATE(11025) && |
| rate != SB8_RATE(22050))) |
| return -EINVAL; |
| chip->capture_format = SB_DSP_HI_INPUT_AUTO; |
| break; |
| } |
| chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO; |
| break; |
| case SB_HW_201: |
| if (rate > 13000) { |
| chip->capture_format = SB_DSP_HI_INPUT_AUTO; |
| break; |
| } |
| /* fall through */ |
| case SB_HW_20: |
| chip->capture_format = SB_DSP_LO_INPUT_AUTO; |
| break; |
| case SB_HW_10: |
| chip->capture_format = SB_DSP_INPUT; |
| break; |
| default: |
| return -EINVAL; |
| } |
| if (chip->mode & SB_MODE_CAPTURE_16) { |
| format = stereo ? SB_DSP_STEREO_16BIT : SB_DSP_MONO_16BIT; |
| dma = chip->dma16; |
| } else { |
| format = stereo ? SB_DSP_STEREO_8BIT : SB_DSP_MONO_8BIT; |
| chip->mode |= SB_MODE_CAPTURE_8; |
| dma = chip->dma8; |
| } |
| size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream); |
| count = chip->c_period_size = snd_pcm_lib_period_bytes(substream); |
| spin_lock_irqsave(&chip->reg_lock, flags); |
| snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF); |
| if (chip->hardware == SB_HW_JAZZ16) |
| snd_sbdsp_command(chip, format); |
| else if (stereo) |
| snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT); |
| snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE); |
| if (stereo) { |
| snd_sbdsp_command(chip, 256 - runtime->rate_den / 2); |
| spin_lock(&chip->mixer_lock); |
| /* save input filter status and turn it off */ |
| mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT); |
| snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20); |
| spin_unlock(&chip->mixer_lock); |
| /* just use force_mode16 for temporary storate... */ |
| chip->force_mode16 = mixreg; |
| } else { |
| snd_sbdsp_command(chip, 256 - runtime->rate_den); |
| } |
| if (chip->capture_format != SB_DSP_INPUT) { |
| if (chip->mode & SB_MODE_PLAYBACK_16) |
| count /= 2; |
| count--; |
| snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE); |
| snd_sbdsp_command(chip, count & 0xff); |
| snd_sbdsp_command(chip, count >> 8); |
| } |
| spin_unlock_irqrestore(&chip->reg_lock, flags); |
| snd_dma_program(dma, runtime->dma_addr, |
| size, DMA_MODE_READ | DMA_AUTOINIT); |
| return 0; |
| } |
| |
| static int snd_sb8_capture_trigger(struct snd_pcm_substream *substream, |
| int cmd) |
| { |
| unsigned long flags; |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| unsigned int count; |
| |
| spin_lock_irqsave(&chip->reg_lock, flags); |
| switch (cmd) { |
| case SNDRV_PCM_TRIGGER_START: |
| snd_sbdsp_command(chip, chip->capture_format); |
| if (chip->capture_format == SB_DSP_INPUT) { |
| count = chip->c_period_size - 1; |
| snd_sbdsp_command(chip, count & 0xff); |
| snd_sbdsp_command(chip, count >> 8); |
| } |
| break; |
| case SNDRV_PCM_TRIGGER_STOP: |
| if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| snd_sbdsp_reset(chip); |
| if (runtime->channels > 1) { |
| /* restore input filter status */ |
| spin_lock(&chip->mixer_lock); |
| snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16); |
| spin_unlock(&chip->mixer_lock); |
| /* set hardware to mono mode */ |
| snd_sbdsp_command(chip, SB_DSP_MONO_8BIT); |
| } |
| } else { |
| snd_sbdsp_command(chip, SB_DSP_DMA8_OFF); |
| } |
| snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF); |
| } |
| spin_unlock_irqrestore(&chip->reg_lock, flags); |
| return 0; |
| } |
| |
| irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip) |
| { |
| struct snd_pcm_substream *substream; |
| |
| snd_sb_ack_8bit(chip); |
| switch (chip->mode) { |
| case SB_MODE_PLAYBACK_16: /* ok.. playback is active */ |
| if (chip->hardware != SB_HW_JAZZ16) |
| break; |
| /* fall through */ |
| case SB_MODE_PLAYBACK_8: |
| substream = chip->playback_substream; |
| if (chip->playback_format == SB_DSP_OUTPUT) |
| snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START); |
| snd_pcm_period_elapsed(substream); |
| break; |
| case SB_MODE_CAPTURE_16: |
| if (chip->hardware != SB_HW_JAZZ16) |
| break; |
| /* fall through */ |
| case SB_MODE_CAPTURE_8: |
| substream = chip->capture_substream; |
| if (chip->capture_format == SB_DSP_INPUT) |
| snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START); |
| snd_pcm_period_elapsed(substream); |
| break; |
| } |
| return IRQ_HANDLED; |
| } |
| |
| static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream) |
| { |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| size_t ptr; |
| int dma; |
| |
| if (chip->mode & SB_MODE_PLAYBACK_8) |
| dma = chip->dma8; |
| else if (chip->mode & SB_MODE_PLAYBACK_16) |
| dma = chip->dma16; |
| else |
| return 0; |
| ptr = snd_dma_pointer(dma, chip->p_dma_size); |
| return bytes_to_frames(substream->runtime, ptr); |
| } |
| |
| static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream) |
| { |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| size_t ptr; |
| int dma; |
| |
| if (chip->mode & SB_MODE_CAPTURE_8) |
| dma = chip->dma8; |
| else if (chip->mode & SB_MODE_CAPTURE_16) |
| dma = chip->dma16; |
| else |
| return 0; |
| ptr = snd_dma_pointer(dma, chip->c_dma_size); |
| return bytes_to_frames(substream->runtime, ptr); |
| } |
| |
| /* |
| |
| */ |
| |
| static const struct snd_pcm_hardware snd_sb8_playback = |
| { |
| .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_MMAP_VALID), |
| .formats = SNDRV_PCM_FMTBIT_U8, |
| .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 | |
| SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050), |
| .rate_min = 4000, |
| .rate_max = 23000, |
| .channels_min = 1, |
| .channels_max = 1, |
| .buffer_bytes_max = 65536, |
| .period_bytes_min = 64, |
| .period_bytes_max = 65536, |
| .periods_min = 1, |
| .periods_max = 1024, |
| .fifo_size = 0, |
| }; |
| |
| static const struct snd_pcm_hardware snd_sb8_capture = |
| { |
| .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_MMAP_VALID), |
| .formats = SNDRV_PCM_FMTBIT_U8, |
| .rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 | |
| SNDRV_PCM_RATE_11025), |
| .rate_min = 4000, |
| .rate_max = 13000, |
| .channels_min = 1, |
| .channels_max = 1, |
| .buffer_bytes_max = 65536, |
| .period_bytes_min = 64, |
| .period_bytes_max = 65536, |
| .periods_min = 1, |
| .periods_max = 1024, |
| .fifo_size = 0, |
| }; |
| |
| /* |
| * |
| */ |
| |
| static int snd_sb8_open(struct snd_pcm_substream *substream) |
| { |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&chip->open_lock, flags); |
| if (chip->open) { |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| return -EAGAIN; |
| } |
| chip->open |= SB_OPEN_PCM; |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| chip->playback_substream = substream; |
| runtime->hw = snd_sb8_playback; |
| } else { |
| chip->capture_substream = substream; |
| runtime->hw = snd_sb8_capture; |
| } |
| switch (chip->hardware) { |
| case SB_HW_JAZZ16: |
| if (chip->dma16 == 5 || chip->dma16 == 7) |
| runtime->hw.formats |= SNDRV_PCM_FMTBIT_S16_LE; |
| runtime->hw.rates |= SNDRV_PCM_RATE_8000_48000; |
| runtime->hw.rate_min = 4000; |
| runtime->hw.rate_max = 50000; |
| runtime->hw.channels_max = 2; |
| break; |
| case SB_HW_PRO: |
| runtime->hw.rate_max = 44100; |
| runtime->hw.channels_max = 2; |
| snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| snd_sb8_hw_constraint_rate_channels, NULL, |
| SNDRV_PCM_HW_PARAM_CHANNELS, |
| SNDRV_PCM_HW_PARAM_RATE, -1); |
| snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
| snd_sb8_hw_constraint_channels_rate, NULL, |
| SNDRV_PCM_HW_PARAM_RATE, -1); |
| break; |
| case SB_HW_201: |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| runtime->hw.rate_max = 44100; |
| } else { |
| runtime->hw.rate_max = 15000; |
| } |
| default: |
| break; |
| } |
| snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
| &hw_constraints_clock); |
| if (chip->dma8 > 3 || chip->dma16 >= 0) { |
| snd_pcm_hw_constraint_step(runtime, 0, |
| SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 2); |
| snd_pcm_hw_constraint_step(runtime, 0, |
| SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 2); |
| runtime->hw.buffer_bytes_max = 128 * 1024 * 1024; |
| runtime->hw.period_bytes_max = 128 * 1024 * 1024; |
| } |
| return 0; |
| } |
| |
| static int snd_sb8_close(struct snd_pcm_substream *substream) |
| { |
| unsigned long flags; |
| struct snd_sb *chip = snd_pcm_substream_chip(substream); |
| |
| chip->playback_substream = NULL; |
| chip->capture_substream = NULL; |
| spin_lock_irqsave(&chip->open_lock, flags); |
| chip->open &= ~SB_OPEN_PCM; |
| if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| chip->mode &= ~SB_MODE_PLAYBACK; |
| else |
| chip->mode &= ~SB_MODE_CAPTURE; |
| spin_unlock_irqrestore(&chip->open_lock, flags); |
| return 0; |
| } |
| |
| /* |
| * Initialization part |
| */ |
| |
| static const struct snd_pcm_ops snd_sb8_playback_ops = { |
| .open = snd_sb8_open, |
| .close = snd_sb8_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .hw_params = snd_sb8_hw_params, |
| .hw_free = snd_sb8_hw_free, |
| .prepare = snd_sb8_playback_prepare, |
| .trigger = snd_sb8_playback_trigger, |
| .pointer = snd_sb8_playback_pointer, |
| }; |
| |
| static const struct snd_pcm_ops snd_sb8_capture_ops = { |
| .open = snd_sb8_open, |
| .close = snd_sb8_close, |
| .ioctl = snd_pcm_lib_ioctl, |
| .hw_params = snd_sb8_hw_params, |
| .hw_free = snd_sb8_hw_free, |
| .prepare = snd_sb8_capture_prepare, |
| .trigger = snd_sb8_capture_trigger, |
| .pointer = snd_sb8_capture_pointer, |
| }; |
| |
| int snd_sb8dsp_pcm(struct snd_sb *chip, int device) |
| { |
| struct snd_card *card = chip->card; |
| struct snd_pcm *pcm; |
| int err; |
| size_t max_prealloc = 64 * 1024; |
| |
| if ((err = snd_pcm_new(card, "SB8 DSP", device, 1, 1, &pcm)) < 0) |
| return err; |
| sprintf(pcm->name, "DSP v%i.%i", chip->version >> 8, chip->version & 0xff); |
| pcm->info_flags = SNDRV_PCM_INFO_HALF_DUPLEX; |
| pcm->private_data = chip; |
| |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sb8_playback_ops); |
| snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sb8_capture_ops); |
| |
| if (chip->dma8 > 3 || chip->dma16 >= 0) |
| max_prealloc = 128 * 1024; |
| snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, |
| card->dev, |
| 64*1024, max_prealloc); |
| |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(snd_sb8dsp_pcm); |
| EXPORT_SYMBOL(snd_sb8dsp_interrupt); |
| /* sb8_midi.c */ |
| EXPORT_SYMBOL(snd_sb8dsp_midi_interrupt); |
| EXPORT_SYMBOL(snd_sb8dsp_midi); |