diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/firewire/tascam/tascam-pcm.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/sound/firewire/tascam/tascam-pcm.c b/sound/firewire/tascam/tascam-pcm.c new file mode 100644 index 000000000..9e58633e2 --- /dev/null +++ b/sound/firewire/tascam/tascam-pcm.c @@ -0,0 +1,300 @@ +/* + * tascam-pcm.c - a part of driver for TASCAM FireWire series + * + * Copyright (c) 2015 Takashi Sakamoto + * + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#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; + enum snd_tscm_clock clock; + unsigned int rate; + int err; + + err = snd_tscm_stream_lock_try(tscm); + if (err < 0) + goto end; + + 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; + + if (clock != SND_TSCM_CLOCK_INTERNAL || + amdtp_stream_pcm_running(&tscm->rx_stream) || + amdtp_stream_pcm_running(&tscm->tx_stream)) { + err = snd_tscm_stream_get_rate(tscm, &rate); + if (err < 0) + goto err_locked; + substream->runtime->hw.rate_min = rate; + substream->runtime->hw.rate_max = rate; + } + + snd_pcm_set_sync(substream); +end: + return err; +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_capture_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_tscm *tscm = substream->private_data; + int err; + + err = snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); + if (err < 0) + return err; + + if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { + mutex_lock(&tscm->mutex); + tscm->substreams_counter++; + mutex_unlock(&tscm->mutex); + } + + return 0; +} + +static int pcm_playback_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_tscm *tscm = substream->private_data; + int err; + + err = snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); + if (err < 0) + return err; + + if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { + mutex_lock(&tscm->mutex); + tscm->substreams_counter++; + mutex_unlock(&tscm->mutex); + } + + return 0; +} + +static int pcm_capture_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_tscm *tscm = substream->private_data; + + mutex_lock(&tscm->mutex); + + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) + tscm->substreams_counter--; + + snd_tscm_stream_stop_duplex(tscm); + + mutex_unlock(&tscm->mutex); + + return snd_pcm_lib_free_vmalloc_buffer(substream); +} + +static int pcm_playback_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_tscm *tscm = substream->private_data; + + mutex_lock(&tscm->mutex); + + if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) + tscm->substreams_counter--; + + snd_tscm_stream_stop_duplex(tscm); + + mutex_unlock(&tscm->mutex); + + return snd_pcm_lib_free_vmalloc_buffer(substream); +} + +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_stream_pcm_pointer(&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_stream_pcm_pointer(&tscm->rx_stream); +} + +static int pcm_capture_ack(struct snd_pcm_substream *substream) +{ + struct snd_tscm *tscm = substream->private_data; + + return amdtp_stream_pcm_ack(&tscm->tx_stream); +} + +static int pcm_playback_ack(struct snd_pcm_substream *substream) +{ + struct snd_tscm *tscm = substream->private_data; + + return amdtp_stream_pcm_ack(&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, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = pcm_capture_hw_params, + .hw_free = pcm_capture_hw_free, + .prepare = pcm_capture_prepare, + .trigger = pcm_capture_trigger, + .pointer = pcm_capture_pointer, + .ack = pcm_capture_ack, + .page = snd_pcm_lib_get_vmalloc_page, + }; + static const struct snd_pcm_ops playback_ops = { + .open = pcm_open, + .close = pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = pcm_playback_hw_params, + .hw_free = pcm_playback_hw_free, + .prepare = pcm_playback_prepare, + .trigger = pcm_playback_trigger, + .pointer = pcm_playback_pointer, + .ack = pcm_playback_ack, + .page = snd_pcm_lib_get_vmalloc_page, + }; + 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); + + return 0; +} |