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-rw-r--r--sound/isa/sb/sb8_main.c565
1 files changed, 565 insertions, 0 deletions
diff --git a/sound/isa/sb/sb8_main.c b/sound/isa/sb/sb8_main.c
new file mode 100644
index 000000000000..87c9b1ba06cf
--- /dev/null
+++ b/sound/isa/sb/sb8_main.c
@@ -0,0 +1,565 @@
+/*
+ * Copyright (c) by Jaroslav Kysela <perex@suse.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.
+ *
+ *
+ * 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 <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 <sound/driver.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/init.h>
+#include <linux/time.h>
+#include <sound/core.h>
+#include <sound/sb.h>
+
+MODULE_AUTHOR("Jaroslav Kysela <perex@suse.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 ratnum_t clock = {
+ .num = SB8_CLOCK,
+ .den_min = 1,
+ .den_max = 256,
+ .den_step = 1,
+};
+
+static snd_pcm_hw_constraint_ratnums_t hw_constraints_clock = {
+ .nrats = 1,
+ .rats = &clock,
+};
+
+static ratnum_t 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(snd_pcm_hw_params_t *params,
+ snd_pcm_hw_rule_t *rule)
+{
+ snd_interval_t *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(snd_pcm_hw_params_t *params,
+ snd_pcm_hw_rule_t *rule)
+{
+ snd_interval_t *r = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
+ if (r->min > SB8_RATE(22050) || r->max <= SB8_RATE(11025)) {
+ snd_interval_t 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(snd_pcm_substream_t * substream)
+{
+ unsigned long flags;
+ sb_t *chip = snd_pcm_substream_chip(substream);
+ snd_pcm_runtime_t *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(snd_pcm_substream_t * substream,
+ int cmd)
+{
+ unsigned long flags;
+ sb_t *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) {
+ snd_pcm_runtime_t *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(snd_pcm_substream_t * substream,
+ snd_pcm_hw_params_t * hw_params)
+{
+ return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
+}
+
+static int snd_sb8_hw_free(snd_pcm_substream_t * substream)
+{
+ snd_pcm_lib_free_pages(substream);
+ return 0;
+}
+
+static int snd_sb8_capture_prepare(snd_pcm_substream_t * substream)
+{
+ unsigned long flags;
+ sb_t *chip = snd_pcm_substream_chip(substream);
+ snd_pcm_runtime_t *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(snd_pcm_substream_t * substream,
+ int cmd)
+{
+ unsigned long flags;
+ sb_t *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) {
+ snd_pcm_runtime_t *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(sb_t *chip)
+{
+ snd_pcm_substream_t *substream;
+ snd_pcm_runtime_t *runtime;
+
+#if 0
+ snd_printk("sb8: interrupt\n");
+#endif
+ 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(snd_pcm_substream_t * substream)
+{
+ sb_t *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(snd_pcm_substream_t * substream)
+{
+ sb_t *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 snd_pcm_hardware_t 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 snd_pcm_hardware_t 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(snd_pcm_substream_t *substream)
+{
+ sb_t *chip = snd_pcm_substream_chip(substream);
+ snd_pcm_runtime_t *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(snd_pcm_substream_t *substream)
+{
+ unsigned long flags;
+ sb_t *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 snd_pcm_ops_t 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 snd_pcm_ops_t 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,
+};
+
+static void snd_sb8dsp_pcm_free(snd_pcm_t *pcm)
+{
+ snd_pcm_lib_preallocate_free_for_all(pcm);
+}
+
+int snd_sb8dsp_pcm(sb_t *chip, int device, snd_pcm_t ** rpcm)
+{
+ snd_card_t *card = chip->card;
+ snd_pcm_t *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;
+ pcm->private_free = snd_sb8dsp_pcm_free;
+
+ 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)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 06:24:33 +0000