372 lines
8.9 KiB
C
372 lines
8.9 KiB
C
/*
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* digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family
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*
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* Copyright (c) 2014-2015 Takashi Sakamoto
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "digi00x.h"
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static int hw_rule_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 =
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hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
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const struct snd_interval *c =
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hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS);
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struct snd_interval t = {
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.min = UINT_MAX, .max = 0, .integer = 1,
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};
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unsigned int i;
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for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
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if (!snd_interval_test(c,
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snd_dg00x_stream_pcm_channels[i]))
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continue;
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t.min = min(t.min, snd_dg00x_stream_rates[i]);
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t.max = max(t.max, snd_dg00x_stream_rates[i]);
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}
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return snd_interval_refine(r, &t);
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}
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static int hw_rule_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 =
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hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
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const struct snd_interval *r =
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hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE);
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struct snd_interval t = {
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.min = UINT_MAX, .max = 0, .integer = 1,
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};
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unsigned int i;
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for (i = 0; i < SND_DG00X_RATE_COUNT; i++) {
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if (!snd_interval_test(r, snd_dg00x_stream_rates[i]))
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continue;
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t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]);
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t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]);
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}
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return snd_interval_refine(c, &t);
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}
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static int pcm_init_hw_params(struct snd_dg00x *dg00x,
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struct snd_pcm_substream *substream)
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{
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_pcm_hardware *hw = &runtime->hw;
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struct amdtp_stream *s;
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int err;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
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s = &dg00x->tx_stream;
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} else {
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substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
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s = &dg00x->rx_stream;
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}
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hw->channels_min = 10;
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hw->channels_max = 18;
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hw->rates = SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000;
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snd_pcm_limit_hw_rates(runtime);
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err = snd_pcm_hw_rule_add(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_CHANNELS,
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hw_rule_channels, NULL,
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SNDRV_PCM_HW_PARAM_RATE, -1);
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if (err < 0)
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return err;
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err = snd_pcm_hw_rule_add(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE,
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hw_rule_rate, NULL,
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SNDRV_PCM_HW_PARAM_CHANNELS, -1);
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if (err < 0)
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return err;
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return amdtp_dot_add_pcm_hw_constraints(s, substream->runtime);
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}
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static int pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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enum snd_dg00x_clock clock;
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bool detect;
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unsigned int rate;
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int err;
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err = snd_dg00x_stream_lock_try(dg00x);
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if (err < 0)
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goto end;
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err = pcm_init_hw_params(dg00x, substream);
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if (err < 0)
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goto err_locked;
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/* Check current clock source. */
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err = snd_dg00x_stream_get_clock(dg00x, &clock);
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if (err < 0)
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goto err_locked;
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if (clock != SND_DG00X_CLOCK_INTERNAL) {
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err = snd_dg00x_stream_check_external_clock(dg00x, &detect);
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if (err < 0)
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goto err_locked;
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if (!detect) {
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err = -EBUSY;
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goto err_locked;
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}
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}
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if ((clock != SND_DG00X_CLOCK_INTERNAL) ||
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amdtp_stream_pcm_running(&dg00x->rx_stream) ||
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amdtp_stream_pcm_running(&dg00x->tx_stream)) {
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err = snd_dg00x_stream_get_external_rate(dg00x, &rate);
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if (err < 0)
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goto err_locked;
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substream->runtime->hw.rate_min = rate;
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substream->runtime->hw.rate_max = rate;
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}
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snd_pcm_set_sync(substream);
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end:
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return err;
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err_locked:
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snd_dg00x_stream_lock_release(dg00x);
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return err;
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}
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static int pcm_close(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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snd_dg00x_stream_lock_release(dg00x);
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return 0;
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}
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static int pcm_capture_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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struct snd_dg00x *dg00x = substream->private_data;
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int err;
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err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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if (err < 0)
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return err;
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&dg00x->mutex);
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dg00x->substreams_counter++;
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mutex_unlock(&dg00x->mutex);
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}
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return 0;
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}
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static int pcm_playback_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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struct snd_dg00x *dg00x = substream->private_data;
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int err;
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err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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if (err < 0)
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return err;
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&dg00x->mutex);
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dg00x->substreams_counter++;
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mutex_unlock(&dg00x->mutex);
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}
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return 0;
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}
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static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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mutex_lock(&dg00x->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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dg00x->substreams_counter--;
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snd_dg00x_stream_stop_duplex(dg00x);
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mutex_unlock(&dg00x->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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mutex_lock(&dg00x->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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dg00x->substreams_counter--;
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snd_dg00x_stream_stop_duplex(dg00x);
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mutex_unlock(&dg00x->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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static int pcm_capture_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&dg00x->mutex);
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err = snd_dg00x_stream_start_duplex(dg00x, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&dg00x->tx_stream);
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mutex_unlock(&dg00x->mutex);
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return err;
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}
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static int pcm_playback_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&dg00x->mutex);
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err = snd_dg00x_stream_start_duplex(dg00x, runtime->rate);
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if (err >= 0) {
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amdtp_stream_pcm_prepare(&dg00x->rx_stream);
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amdtp_dot_reset(&dg00x->rx_stream);
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}
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mutex_unlock(&dg00x->mutex);
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return err;
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}
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static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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amdtp_stream_pcm_trigger(&dg00x->tx_stream, substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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amdtp_stream_pcm_trigger(&dg00x->tx_stream, NULL);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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amdtp_stream_pcm_trigger(&dg00x->rx_stream, substream);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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amdtp_stream_pcm_trigger(&dg00x->rx_stream, NULL);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
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{
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struct snd_dg00x *dg00x = sbstrm->private_data;
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return amdtp_stream_pcm_pointer(&dg00x->tx_stream);
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}
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static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
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{
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struct snd_dg00x *dg00x = sbstrm->private_data;
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return amdtp_stream_pcm_pointer(&dg00x->rx_stream);
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}
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static int pcm_capture_ack(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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return amdtp_stream_pcm_ack(&dg00x->tx_stream);
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}
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static int pcm_playback_ack(struct snd_pcm_substream *substream)
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{
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struct snd_dg00x *dg00x = substream->private_data;
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return amdtp_stream_pcm_ack(&dg00x->rx_stream);
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}
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int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x)
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{
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static const struct snd_pcm_ops capture_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = pcm_capture_hw_params,
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.hw_free = pcm_capture_hw_free,
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.prepare = pcm_capture_prepare,
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.trigger = pcm_capture_trigger,
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.pointer = pcm_capture_pointer,
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.ack = pcm_capture_ack,
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.page = snd_pcm_lib_get_vmalloc_page,
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};
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static const struct snd_pcm_ops playback_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = pcm_playback_hw_params,
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.hw_free = pcm_playback_hw_free,
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.prepare = pcm_playback_prepare,
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.trigger = pcm_playback_trigger,
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.pointer = pcm_playback_pointer,
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.ack = pcm_playback_ack,
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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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};
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struct snd_pcm *pcm;
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int err;
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err = snd_pcm_new(dg00x->card, dg00x->card->driver, 0, 1, 1, &pcm);
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if (err < 0)
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return err;
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pcm->private_data = dg00x;
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snprintf(pcm->name, sizeof(pcm->name),
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"%s PCM", dg00x->card->shortname);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
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return 0;
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}
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