560 lines
16 KiB
C
560 lines
16 KiB
C
/*
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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* Uros Bizjak <uros@kss-loka.si>
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*
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* Routines for control of 8-bit SoundBlaster cards and clones
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* Please note: I don't have access to old SB8 soundcards.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* --
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*
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* Thu Apr 29 20:36:17 BST 1999 George David Morrison <gdm@gedamo.demon.co.uk>
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* DSP can't respond to commands whilst in "high speed" mode. Caused
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* glitching during playback. Fixed.
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*
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* Wed Jul 12 22:02:55 CEST 2000 Uros Bizjak <uros@kss-loka.si>
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* Cleaned up and rewrote lowlevel routines.
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*/
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <linux/init.h>
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#include <linux/time.h>
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#include <sound/core.h>
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#include <sound/sb.h>
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MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Uros Bizjak <uros@kss-loka.si>");
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MODULE_DESCRIPTION("Routines for control of 8-bit SoundBlaster cards and clones");
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MODULE_LICENSE("GPL");
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#define SB8_CLOCK 1000000
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#define SB8_DEN(v) ((SB8_CLOCK + (v) / 2) / (v))
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#define SB8_RATE(v) (SB8_CLOCK / SB8_DEN(v))
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static struct snd_ratnum clock = {
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.num = SB8_CLOCK,
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.den_min = 1,
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.den_max = 256,
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.den_step = 1,
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};
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static struct snd_pcm_hw_constraint_ratnums hw_constraints_clock = {
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.nrats = 1,
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.rats = &clock,
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};
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static struct snd_ratnum stereo_clocks[] = {
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{
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.num = SB8_CLOCK,
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.den_min = SB8_DEN(22050),
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.den_max = SB8_DEN(22050),
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.den_step = 1,
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},
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{
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.num = SB8_CLOCK,
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.den_min = SB8_DEN(11025),
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.den_max = SB8_DEN(11025),
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.den_step = 1,
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}
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};
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static int snd_sb8_hw_constraint_rate_channels(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule)
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{
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struct snd_interval *c = hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
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if (c->min > 1) {
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unsigned int num = 0, den = 0;
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int err = snd_interval_ratnum(hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE),
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2, stereo_clocks, &num, &den);
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if (err >= 0 && den) {
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params->rate_num = num;
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params->rate_den = den;
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}
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return err;
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}
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return 0;
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}
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static int snd_sb8_hw_constraint_channels_rate(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule)
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{
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struct snd_interval *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
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if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
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struct snd_interval t = { .min = 1, .max = 1 };
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return snd_interval_refine(hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS), &t);
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}
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return 0;
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}
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static int snd_sb8_playback_prepare(struct snd_pcm_substream *substream)
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{
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unsigned long flags;
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned int mixreg, rate, size, count;
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rate = runtime->rate;
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switch (chip->hardware) {
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case SB_HW_PRO:
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if (runtime->channels > 1) {
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if (snd_BUG_ON(rate != SB8_RATE(11025) &&
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rate != SB8_RATE(22050)))
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return -EINVAL;
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chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
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break;
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}
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/* fallthru */
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case SB_HW_201:
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if (rate > 23000) {
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chip->playback_format = SB_DSP_HI_OUTPUT_AUTO;
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break;
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}
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/* fallthru */
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case SB_HW_20:
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chip->playback_format = SB_DSP_LO_OUTPUT_AUTO;
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break;
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case SB_HW_10:
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chip->playback_format = SB_DSP_OUTPUT;
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break;
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default:
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return -EINVAL;
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}
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size = chip->p_dma_size = snd_pcm_lib_buffer_bytes(substream);
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count = chip->p_period_size = snd_pcm_lib_period_bytes(substream);
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spin_lock_irqsave(&chip->reg_lock, flags);
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snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON);
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if (runtime->channels > 1) {
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/* set playback stereo mode */
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spin_lock(&chip->mixer_lock);
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mixreg = snd_sbmixer_read(chip, SB_DSP_STEREO_SW);
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snd_sbmixer_write(chip, SB_DSP_STEREO_SW, mixreg | 0x02);
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spin_unlock(&chip->mixer_lock);
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/* Soundblaster hardware programming reference guide, 3-23 */
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snd_sbdsp_command(chip, SB_DSP_DMA8_EXIT);
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runtime->dma_area[0] = 0x80;
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snd_dma_program(chip->dma8, runtime->dma_addr, 1, DMA_MODE_WRITE);
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/* force interrupt */
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chip->mode = SB_MODE_HALT;
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snd_sbdsp_command(chip, SB_DSP_OUTPUT);
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snd_sbdsp_command(chip, 0);
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snd_sbdsp_command(chip, 0);
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}
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snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
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if (runtime->channels > 1) {
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snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
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spin_lock(&chip->mixer_lock);
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/* save output filter status and turn it off */
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mixreg = snd_sbmixer_read(chip, SB_DSP_PLAYBACK_FILT);
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snd_sbmixer_write(chip, SB_DSP_PLAYBACK_FILT, mixreg | 0x20);
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spin_unlock(&chip->mixer_lock);
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/* just use force_mode16 for temporary storate... */
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chip->force_mode16 = mixreg;
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} else {
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snd_sbdsp_command(chip, 256 - runtime->rate_den);
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}
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if (chip->playback_format != SB_DSP_OUTPUT) {
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count--;
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snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
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snd_sbdsp_command(chip, count & 0xff);
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snd_sbdsp_command(chip, count >> 8);
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}
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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snd_dma_program(chip->dma8, runtime->dma_addr,
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size, DMA_MODE_WRITE | DMA_AUTOINIT);
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return 0;
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}
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static int snd_sb8_playback_trigger(struct snd_pcm_substream *substream,
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int cmd)
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{
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unsigned long flags;
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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unsigned int count;
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spin_lock_irqsave(&chip->reg_lock, flags);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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snd_sbdsp_command(chip, chip->playback_format);
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if (chip->playback_format == SB_DSP_OUTPUT) {
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count = chip->p_period_size - 1;
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snd_sbdsp_command(chip, count & 0xff);
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snd_sbdsp_command(chip, count >> 8);
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}
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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if (chip->playback_format == SB_DSP_HI_OUTPUT_AUTO) {
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struct snd_pcm_runtime *runtime = substream->runtime;
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snd_sbdsp_reset(chip);
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if (runtime->channels > 1) {
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spin_lock(&chip->mixer_lock);
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/* restore output filter and set hardware to mono mode */
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snd_sbmixer_write(chip, SB_DSP_STEREO_SW, chip->force_mode16 & ~0x02);
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spin_unlock(&chip->mixer_lock);
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}
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} else {
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snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
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}
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snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
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}
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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chip->mode = (cmd == SNDRV_PCM_TRIGGER_START) ? SB_MODE_PLAYBACK_8 : SB_MODE_HALT;
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return 0;
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}
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static int snd_sb8_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *hw_params)
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{
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return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
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}
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static int snd_sb8_hw_free(struct snd_pcm_substream *substream)
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{
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snd_pcm_lib_free_pages(substream);
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return 0;
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}
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static int snd_sb8_capture_prepare(struct snd_pcm_substream *substream)
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{
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unsigned long flags;
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned int mixreg, rate, size, count;
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rate = runtime->rate;
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switch (chip->hardware) {
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case SB_HW_PRO:
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if (runtime->channels > 1) {
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if (snd_BUG_ON(rate != SB8_RATE(11025) &&
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rate != SB8_RATE(22050)))
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return -EINVAL;
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chip->capture_format = SB_DSP_HI_INPUT_AUTO;
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break;
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}
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chip->capture_format = (rate > 23000) ? SB_DSP_HI_INPUT_AUTO : SB_DSP_LO_INPUT_AUTO;
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break;
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case SB_HW_201:
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if (rate > 13000) {
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chip->capture_format = SB_DSP_HI_INPUT_AUTO;
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break;
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}
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/* fallthru */
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case SB_HW_20:
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chip->capture_format = SB_DSP_LO_INPUT_AUTO;
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break;
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case SB_HW_10:
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chip->capture_format = SB_DSP_INPUT;
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break;
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default:
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return -EINVAL;
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}
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size = chip->c_dma_size = snd_pcm_lib_buffer_bytes(substream);
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count = chip->c_period_size = snd_pcm_lib_period_bytes(substream);
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spin_lock_irqsave(&chip->reg_lock, flags);
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snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
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if (runtime->channels > 1)
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snd_sbdsp_command(chip, SB_DSP_STEREO_8BIT);
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snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE);
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if (runtime->channels > 1) {
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snd_sbdsp_command(chip, 256 - runtime->rate_den / 2);
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spin_lock(&chip->mixer_lock);
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/* save input filter status and turn it off */
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mixreg = snd_sbmixer_read(chip, SB_DSP_CAPTURE_FILT);
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snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, mixreg | 0x20);
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spin_unlock(&chip->mixer_lock);
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/* just use force_mode16 for temporary storate... */
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chip->force_mode16 = mixreg;
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} else {
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snd_sbdsp_command(chip, 256 - runtime->rate_den);
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}
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if (chip->capture_format != SB_DSP_INPUT) {
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count--;
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snd_sbdsp_command(chip, SB_DSP_BLOCK_SIZE);
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snd_sbdsp_command(chip, count & 0xff);
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snd_sbdsp_command(chip, count >> 8);
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}
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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snd_dma_program(chip->dma8, runtime->dma_addr,
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size, DMA_MODE_READ | DMA_AUTOINIT);
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return 0;
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}
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static int snd_sb8_capture_trigger(struct snd_pcm_substream *substream,
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int cmd)
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{
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unsigned long flags;
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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unsigned int count;
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spin_lock_irqsave(&chip->reg_lock, flags);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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snd_sbdsp_command(chip, chip->capture_format);
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if (chip->capture_format == SB_DSP_INPUT) {
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count = chip->c_period_size - 1;
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snd_sbdsp_command(chip, count & 0xff);
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snd_sbdsp_command(chip, count >> 8);
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}
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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if (chip->capture_format == SB_DSP_HI_INPUT_AUTO) {
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struct snd_pcm_runtime *runtime = substream->runtime;
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snd_sbdsp_reset(chip);
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if (runtime->channels > 1) {
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/* restore input filter status */
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spin_lock(&chip->mixer_lock);
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snd_sbmixer_write(chip, SB_DSP_CAPTURE_FILT, chip->force_mode16);
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spin_unlock(&chip->mixer_lock);
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/* set hardware to mono mode */
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snd_sbdsp_command(chip, SB_DSP_MONO_8BIT);
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}
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} else {
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snd_sbdsp_command(chip, SB_DSP_DMA8_OFF);
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}
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snd_sbdsp_command(chip, SB_DSP_SPEAKER_OFF);
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}
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spin_unlock_irqrestore(&chip->reg_lock, flags);
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chip->mode = (cmd == SNDRV_PCM_TRIGGER_START) ? SB_MODE_CAPTURE_8 : SB_MODE_HALT;
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return 0;
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}
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irqreturn_t snd_sb8dsp_interrupt(struct snd_sb *chip)
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{
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struct snd_pcm_substream *substream;
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struct snd_pcm_runtime *runtime;
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snd_sb_ack_8bit(chip);
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switch (chip->mode) {
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case SB_MODE_PLAYBACK_8: /* ok.. playback is active */
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substream = chip->playback_substream;
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runtime = substream->runtime;
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if (chip->playback_format == SB_DSP_OUTPUT)
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snd_sb8_playback_trigger(substream, SNDRV_PCM_TRIGGER_START);
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snd_pcm_period_elapsed(substream);
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break;
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case SB_MODE_CAPTURE_8:
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substream = chip->capture_substream;
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runtime = substream->runtime;
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if (chip->capture_format == SB_DSP_INPUT)
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snd_sb8_capture_trigger(substream, SNDRV_PCM_TRIGGER_START);
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snd_pcm_period_elapsed(substream);
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break;
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}
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return IRQ_HANDLED;
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}
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static snd_pcm_uframes_t snd_sb8_playback_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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size_t ptr;
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if (chip->mode != SB_MODE_PLAYBACK_8)
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return 0;
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ptr = snd_dma_pointer(chip->dma8, chip->p_dma_size);
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return bytes_to_frames(substream->runtime, ptr);
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}
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static snd_pcm_uframes_t snd_sb8_capture_pointer(struct snd_pcm_substream *substream)
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{
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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size_t ptr;
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if (chip->mode != SB_MODE_CAPTURE_8)
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return 0;
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ptr = snd_dma_pointer(chip->dma8, chip->c_dma_size);
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return bytes_to_frames(substream->runtime, ptr);
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}
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/*
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*/
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static struct snd_pcm_hardware snd_sb8_playback =
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{
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP_VALID),
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.formats = SNDRV_PCM_FMTBIT_U8,
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.rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
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SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_22050),
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.rate_min = 4000,
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.rate_max = 23000,
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.channels_min = 1,
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.channels_max = 1,
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.buffer_bytes_max = 65536,
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.period_bytes_min = 64,
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.period_bytes_max = 65536,
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.periods_min = 1,
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.periods_max = 1024,
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.fifo_size = 0,
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};
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static struct snd_pcm_hardware snd_sb8_capture =
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{
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.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_MMAP_VALID),
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.formats = SNDRV_PCM_FMTBIT_U8,
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.rates = (SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000 |
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SNDRV_PCM_RATE_11025),
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.rate_min = 4000,
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.rate_max = 13000,
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.channels_min = 1,
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.channels_max = 1,
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.buffer_bytes_max = 65536,
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.period_bytes_min = 64,
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.period_bytes_max = 65536,
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.periods_min = 1,
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.periods_max = 1024,
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.fifo_size = 0,
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};
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/*
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*
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*/
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static int snd_sb8_open(struct snd_pcm_substream *substream)
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{
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struct snd_sb *chip = snd_pcm_substream_chip(substream);
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struct snd_pcm_runtime *runtime = substream->runtime;
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unsigned long flags;
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spin_lock_irqsave(&chip->open_lock, flags);
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if (chip->open) {
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spin_unlock_irqrestore(&chip->open_lock, flags);
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return -EAGAIN;
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}
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chip->open |= SB_OPEN_PCM;
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spin_unlock_irqrestore(&chip->open_lock, flags);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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chip->playback_substream = substream;
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runtime->hw = snd_sb8_playback;
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} else {
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chip->capture_substream = substream;
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runtime->hw = snd_sb8_capture;
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}
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switch (chip->hardware) {
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case SB_HW_PRO:
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runtime->hw.rate_max = 44100;
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runtime->hw.channels_max = 2;
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snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
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snd_sb8_hw_constraint_rate_channels, NULL,
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SNDRV_PCM_HW_PARAM_CHANNELS,
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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)
|