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-rw-r--r--sound/firewire/tascam/tascam-pcm.c289
1 files changed, 289 insertions, 0 deletions
diff --git a/sound/firewire/tascam/tascam-pcm.c b/sound/firewire/tascam/tascam-pcm.c
new file mode 100644
index 0000000000..f6da571707
--- /dev/null
+++ b/sound/firewire/tascam/tascam-pcm.c
@@ -0,0 +1,289 @@
+// 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;
+}