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289 lines
7.1 KiB
289 lines
7.1 KiB
// 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->status->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->status->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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