/* * Copyright (c) by Jaroslav Kysela * Uros Bizjak * * Routines for control of 8-bit SoundBlaster cards and clones * Please note: I don't have access to old SB8 soundcards. * * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * -- * * Thu Apr 29 20:36:17 BST 1999 George David Morrison * 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 * Cleaned up and rewrote lowlevel routines. */ #include #include #include #include #include #include MODULE_AUTHOR("Jaroslav Kysela , Uros Bizjak "); 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 struct snd_ratnum clock = { .num = SB8_CLOCK, .den_min = 1, .den_max = 256, .den_step = 1, }; static struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = { .nrats = 1, .rats = &clock, }; static 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; rate = runtime->rate; switch (chip->hardware) { case SB_HW_PRO: if (runtime->channels > 1) { snd_assert(rate == SB8_RATE(11025) || rate == SB8_RATE(22050), return -EINVAL); chip->playback_format = SB_DSP_HI_OUTPUT_AUTO; break; } /* fallthru */ case SB_HW_201: if (rate > 23000) { chip->playback_format = SB_DSP_HI_OUTPUT_AUTO; break; } /* fallthru */ 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; } 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 (runtime->channels > 1) { /* 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(chip->dma8, runtime->dma_addr, 1, DMA_MODE_WRITE); /* force interrupt */ chip->mode = SB_MODE_HALT; 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 (runtime->channels > 1) { 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) { 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(chip->dma8, 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); chip->mode = (cmd == SNDRV_PCM_TRIGGER_START) ? SB_MODE_PLAYBACK_8 : SB_MODE_HALT; 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; rate = runtime->rate; switch (chip->hardware) { case SB_HW_PRO: if (runtime->channels > 1) { snd_assert(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; } /* fallthru */ 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; } 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 (runtime->channels > 1) snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT); snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE); if (runtime->channels > 1) { 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_OUTPUT) { 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(chip->dma8, 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); chip->mode = (cmd == SNDRV_PCM_TRIGGER_START) ? SB_MODE_CAPTURE_8 : SB_MODE_HALT; return 0; } irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip) { struct snd_pcm_substream *substream; struct snd_pcm_runtime *runtime; snd_sb_ack_8bit(chip); switch (chip->mode) { case SB_MODE_PLAYBACK_8: /* ok.. playback is active */ substream = chip->playback_substream; runtime = substream->runtime; 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_8: substream = chip->capture_substream; runtime = substream->runtime; 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; if (chip->mode != SB_MODE_PLAYBACK_8) return 0; ptr = snd_dma_pointer(chip->dma8, 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; if (chip->mode != SB_MODE_CAPTURE_8) return 0; ptr = snd_dma_pointer(chip->dma8, chip->c_dma_size); return bytes_to_frames(substream->runtime, ptr); } /* */ static 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 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_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); 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; spin_unlock_irqrestore(&chip->open_lock, flags); return 0; } /* * Initialization part */ static 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 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_pcm ** rpcm) { struct snd_card *card = chip->card; struct snd_pcm *pcm; int err; if (rpcm) *rpcm = NULL; 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); snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_isa_data(), 64*1024, 64*1024); if (rpcm) *rpcm = pcm; 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); /* * INIT part */ static int __init alsa_sb8_init(void) { return 0; } static void __exit alsa_sb8_exit(void) { } module_init(alsa_sb8_init) module_exit(alsa_sb8_exit)