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// SPDX-License-Identifier: GPL-2.0-only
/*
* tascam-pcm.c - a part of driver for TASCAM FireWire series
*
* Copyright (c) 2015 Takashi Sakamoto
*/
#include "tascam.h"
static int pcm_init_hw_params(struct snd_tscm *tscm,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_pcm_hardware *hw = &runtime->hw;
struct amdtp_stream *stream;
unsigned int pcm_channels;
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
stream = &tscm->tx_stream;
pcm_channels = tscm->spec->pcm_capture_analog_channels;
} else {
runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
stream = &tscm->rx_stream;
pcm_channels = tscm->spec->pcm_playback_analog_channels;
}
if (tscm->spec->has_adat)
pcm_channels += 8;
if (tscm->spec->has_spdif)
pcm_channels += 2;
runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
hw->rates = SNDRV_PCM_RATE_44100 |
SNDRV_PCM_RATE_48000 |
SNDRV_PCM_RATE_88200 |
SNDRV_PCM_RATE_96000;
snd_pcm_limit_hw_rates(runtime);
return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
}
static int pcm_open(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
struct amdtp_domain *d = &tscm->domain;
enum snd_tscm_clock clock;
int err;
err = snd_tscm_stream_lock_try(tscm);
if (err < 0)
return err;
err = pcm_init_hw_params(tscm, substream);
if (err < 0)
goto err_locked;
err = snd_tscm_stream_get_clock(tscm, &clock);
if (err < 0)
goto err_locked;
mutex_lock(&tscm->mutex);
// When source of clock is not internal or any stream is reserved for
// transmission of PCM frames, the available sampling rate is limited
// at current one.
if (clock != SND_TSCM_CLOCK_INTERNAL || tscm->substreams_counter > 0) {
unsigned int frames_per_period = d->events_per_period;
unsigned int frames_per_buffer = d->events_per_buffer;
unsigned int rate;
err = snd_tscm_stream_get_rate(tscm, &rate);
if (err < 0) {
mutex_unlock(&tscm->mutex);
goto err_locked;
}
substream->runtime->hw.rate_min = rate;
substream->runtime->hw.rate_max = rate;
err = snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
frames_per_period, frames_per_period);
if (err < 0) {
mutex_unlock(&tscm->mutex);
goto err_locked;
}
err = snd_pcm_hw_constraint_minmax(substream->runtime,
SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
frames_per_buffer, frames_per_buffer);
if (err < 0) {
mutex_unlock(&tscm->mutex);
goto err_locked;
}
}
mutex_unlock(&tscm->mutex);
snd_pcm_set_sync(substream);
return 0;
err_locked:
snd_tscm_stream_lock_release(tscm);
return err;
}
static int pcm_close(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
snd_tscm_stream_lock_release(tscm);
return 0;
}
static int pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
struct snd_tscm *tscm = substream->private_data;
int err = 0;
if (substream->runtime->state == SNDRV_PCM_STATE_OPEN) {
unsigned int rate = params_rate(hw_params);
unsigned int frames_per_period = params_period_size(hw_params);
unsigned int frames_per_buffer = params_buffer_size(hw_params);
mutex_lock(&tscm->mutex);
err = snd_tscm_stream_reserve_duplex(tscm, rate,
frames_per_period, frames_per_buffer);
if (err >= 0)
++tscm->substreams_counter;
mutex_unlock(&tscm->mutex);
}
return err;
}
static int pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
mutex_lock(&tscm->mutex);
if (substream->runtime->state != SNDRV_PCM_STATE_OPEN)
--tscm->substreams_counter;
snd_tscm_stream_stop_duplex(tscm);
mutex_unlock(&tscm->mutex);
return 0;
}
static int pcm_capture_prepare(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
mutex_lock(&tscm->mutex);
err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
if (err >= 0)
amdtp_stream_pcm_prepare(&tscm->tx_stream);
mutex_unlock(&tscm->mutex);
return err;
}
static int pcm_playback_prepare(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
struct snd_pcm_runtime *runtime = substream->runtime;
int err;
mutex_lock(&tscm->mutex);
err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
if (err >= 0)
amdtp_stream_pcm_prepare(&tscm->rx_stream);
mutex_unlock(&tscm->mutex);
return err;
}
static int pcm_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_tscm *tscm = substream->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
amdtp_stream_pcm_trigger(&tscm->tx_stream, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
amdtp_stream_pcm_trigger(&tscm->tx_stream, NULL);
break;
default:
return -EINVAL;
}
return 0;
}
static int pcm_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_tscm *tscm = substream->private_data;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
amdtp_stream_pcm_trigger(&tscm->rx_stream, substream);
break;
case SNDRV_PCM_TRIGGER_STOP:
amdtp_stream_pcm_trigger(&tscm->rx_stream, NULL);
break;
default:
return -EINVAL;
}
return 0;
}
static snd_pcm_uframes_t pcm_capture_pointer(struct snd_pcm_substream *sbstrm)
{
struct snd_tscm *tscm = sbstrm->private_data;
return amdtp_domain_stream_pcm_pointer(&tscm->domain, &tscm->tx_stream);
}
static snd_pcm_uframes_t pcm_playback_pointer(struct snd_pcm_substream *sbstrm)
{
struct snd_tscm *tscm = sbstrm->private_data;
return amdtp_domain_stream_pcm_pointer(&tscm->domain, &tscm->rx_stream);
}
static int pcm_capture_ack(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
return amdtp_domain_stream_pcm_ack(&tscm->domain, &tscm->tx_stream);
}
static int pcm_playback_ack(struct snd_pcm_substream *substream)
{
struct snd_tscm *tscm = substream->private_data;
return amdtp_domain_stream_pcm_ack(&tscm->domain, &tscm->rx_stream);
}
int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
{
static const struct snd_pcm_ops capture_ops = {
.open = pcm_open,
.close = pcm_close,
.hw_params = pcm_hw_params,
.hw_free = pcm_hw_free,
.prepare = pcm_capture_prepare,
.trigger = pcm_capture_trigger,
.pointer = pcm_capture_pointer,
.ack = pcm_capture_ack,
};
static const struct snd_pcm_ops playback_ops = {
.open = pcm_open,
.close = pcm_close,
.hw_params = pcm_hw_params,
.hw_free = pcm_hw_free,
.prepare = pcm_playback_prepare,
.trigger = pcm_playback_trigger,
.pointer = pcm_playback_pointer,
.ack = pcm_playback_ack,
};
struct snd_pcm *pcm;
int err;
err = snd_pcm_new(tscm->card, tscm->card->driver, 0, 1, 1, &pcm);
if (err < 0)
return err;
pcm->private_data = tscm;
snprintf(pcm->name, sizeof(pcm->name),
"%s PCM", tscm->card->shortname);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
return 0;
}
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