| /* |
| * 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 void set_buffer_params(struct snd_pcm_hardware *hw) |
| { |
| hw->period_bytes_min = 4 * hw->channels_min; |
| hw->period_bytes_max = hw->period_bytes_min * 2048; |
| hw->buffer_bytes_max = hw->period_bytes_max * 2; |
| |
| hw->periods_min = 2; |
| hw->periods_max = UINT_MAX; |
| } |
| |
| static int pcm_init_hw_params(struct snd_tscm *tscm, |
| struct snd_pcm_substream *substream) |
| { |
| static const struct snd_pcm_hardware hardware = { |
| .info = SNDRV_PCM_INFO_BATCH | |
| SNDRV_PCM_INFO_BLOCK_TRANSFER | |
| SNDRV_PCM_INFO_INTERLEAVED | |
| SNDRV_PCM_INFO_JOINT_DUPLEX | |
| SNDRV_PCM_INFO_MMAP | |
| SNDRV_PCM_INFO_MMAP_VALID, |
| .rates = SNDRV_PCM_RATE_44100 | |
| SNDRV_PCM_RATE_48000 | |
| SNDRV_PCM_RATE_88200 | |
| SNDRV_PCM_RATE_96000, |
| .rate_min = 44100, |
| .rate_max = 96000, |
| .channels_min = 10, |
| .channels_max = 18, |
| }; |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct amdtp_stream *stream; |
| unsigned int pcm_channels; |
| |
| runtime->hw = hardware; |
| |
| 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_S16 | 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; |
| |
| set_buffer_params(&runtime->hw); |
| |
| 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 (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); |
| } |
| |
| amdtp_tscm_set_pcm_format(&tscm->tx_stream, params_format(hw_params)); |
| |
| 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); |
| } |
| |
| amdtp_tscm_set_pcm_format(&tscm->rx_stream, params_format(hw_params)); |
| |
| 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); |
| } |
| |
| 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, |
| .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, |
| .page = snd_pcm_lib_get_vmalloc_page, |
| .mmap = snd_pcm_lib_mmap_vmalloc, |
| }; |
| 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; |
| } |