290 lines
7.1 KiB
C
290 lines
7.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* tascam-pcm.c - a part of driver for TASCAM FireWire series
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*
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* Copyright (c) 2015 Takashi Sakamoto
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*/
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#include "tascam.h"
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static int pcm_init_hw_params(struct snd_tscm *tscm,
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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 *stream;
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unsigned int pcm_channels;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
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stream = &tscm->tx_stream;
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pcm_channels = tscm->spec->pcm_capture_analog_channels;
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} else {
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
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stream = &tscm->rx_stream;
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pcm_channels = tscm->spec->pcm_playback_analog_channels;
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}
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if (tscm->spec->has_adat)
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pcm_channels += 8;
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if (tscm->spec->has_spdif)
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pcm_channels += 2;
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runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
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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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return amdtp_tscm_add_pcm_hw_constraints(stream, 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_tscm *tscm = substream->private_data;
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struct amdtp_domain *d = &tscm->domain;
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enum snd_tscm_clock clock;
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int err;
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err = snd_tscm_stream_lock_try(tscm);
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if (err < 0)
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return err;
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err = pcm_init_hw_params(tscm, substream);
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if (err < 0)
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goto err_locked;
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err = snd_tscm_stream_get_clock(tscm, &clock);
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if (err < 0)
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goto err_locked;
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mutex_lock(&tscm->mutex);
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// When source of clock is not internal or any stream is reserved for
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// transmission of PCM frames, the available sampling rate is limited
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// at current one.
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if (clock != SND_TSCM_CLOCK_INTERNAL || tscm->substreams_counter > 0) {
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unsigned int frames_per_period = d->events_per_period;
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unsigned int frames_per_buffer = d->events_per_buffer;
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unsigned int rate;
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err = snd_tscm_stream_get_rate(tscm, &rate);
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if (err < 0) {
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mutex_unlock(&tscm->mutex);
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goto err_locked;
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}
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substream->runtime->hw.rate_min = rate;
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substream->runtime->hw.rate_max = rate;
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err = snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
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frames_per_period, frames_per_period);
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if (err < 0) {
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mutex_unlock(&tscm->mutex);
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goto err_locked;
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}
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err = snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
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frames_per_buffer, frames_per_buffer);
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if (err < 0) {
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mutex_unlock(&tscm->mutex);
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goto err_locked;
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}
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}
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mutex_unlock(&tscm->mutex);
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snd_pcm_set_sync(substream);
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return 0;
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err_locked:
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snd_tscm_stream_lock_release(tscm);
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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_tscm *tscm = substream->private_data;
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snd_tscm_stream_lock_release(tscm);
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return 0;
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}
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static int pcm_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_tscm *tscm = substream->private_data;
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int err = 0;
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if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
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unsigned int rate = params_rate(hw_params);
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unsigned int frames_per_period = params_period_size(hw_params);
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unsigned int frames_per_buffer = params_buffer_size(hw_params);
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mutex_lock(&tscm->mutex);
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err = snd_tscm_stream_reserve_duplex(tscm, rate,
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frames_per_period, frames_per_buffer);
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if (err >= 0)
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++tscm->substreams_counter;
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mutex_unlock(&tscm->mutex);
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}
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return err;
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}
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static int pcm_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_tscm *tscm = substream->private_data;
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mutex_lock(&tscm->mutex);
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if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
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--tscm->substreams_counter;
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snd_tscm_stream_stop_duplex(tscm);
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mutex_unlock(&tscm->mutex);
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return 0;
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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_tscm *tscm = 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(&tscm->mutex);
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err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&tscm->tx_stream);
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mutex_unlock(&tscm->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_tscm *tscm = 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(&tscm->mutex);
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err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&tscm->rx_stream);
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mutex_unlock(&tscm->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_tscm *tscm = 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(&tscm->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(&tscm->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_tscm *tscm = 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(&tscm->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(&tscm->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_tscm *tscm = sbstrm->private_data;
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return amdtp_domain_stream_pcm_pointer(&tscm->domain, &tscm->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_tscm *tscm = sbstrm->private_data;
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return amdtp_domain_stream_pcm_pointer(&tscm->domain, &tscm->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_tscm *tscm = substream->private_data;
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return amdtp_domain_stream_pcm_ack(&tscm->domain, &tscm->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_tscm *tscm = substream->private_data;
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return amdtp_domain_stream_pcm_ack(&tscm->domain, &tscm->rx_stream);
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}
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int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
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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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.hw_params = pcm_hw_params,
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.hw_free = pcm_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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};
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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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.hw_params = pcm_hw_params,
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.hw_free = pcm_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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};
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struct snd_pcm *pcm;
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int err;
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err = snd_pcm_new(tscm->card, tscm->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 = tscm;
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snprintf(pcm->name, sizeof(pcm->name),
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"%s PCM", tscm->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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snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
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return 0;
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}
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