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360 lines
8.8 KiB
360 lines
8.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* digi00x-pcm.c - a part of driver for Digidesign Digi 002/003 family |
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* |
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* Copyright (c) 2014-2015 Takashi Sakamoto |
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*/ |
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#include "digi00x.h" |
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static int hw_rule_rate(struct snd_pcm_hw_params *params, |
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struct snd_pcm_hw_rule *rule) |
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{ |
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struct snd_interval *r = |
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hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
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const struct snd_interval *c = |
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hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
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struct snd_interval t = { |
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.min = UINT_MAX, .max = 0, .integer = 1, |
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}; |
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unsigned int i; |
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for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { |
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if (!snd_interval_test(c, |
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snd_dg00x_stream_pcm_channels[i])) |
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continue; |
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t.min = min(t.min, snd_dg00x_stream_rates[i]); |
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t.max = max(t.max, snd_dg00x_stream_rates[i]); |
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} |
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return snd_interval_refine(r, &t); |
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} |
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static int hw_rule_channels(struct snd_pcm_hw_params *params, |
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struct snd_pcm_hw_rule *rule) |
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{ |
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struct snd_interval *c = |
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hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
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const struct snd_interval *r = |
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hw_param_interval_c(params, SNDRV_PCM_HW_PARAM_RATE); |
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struct snd_interval t = { |
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.min = UINT_MAX, .max = 0, .integer = 1, |
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}; |
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unsigned int i; |
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for (i = 0; i < SND_DG00X_RATE_COUNT; i++) { |
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if (!snd_interval_test(r, snd_dg00x_stream_rates[i])) |
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continue; |
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t.min = min(t.min, snd_dg00x_stream_pcm_channels[i]); |
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t.max = max(t.max, snd_dg00x_stream_pcm_channels[i]); |
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} |
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return snd_interval_refine(c, &t); |
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} |
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static int pcm_init_hw_params(struct snd_dg00x *dg00x, |
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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 *s; |
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int err; |
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
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substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; |
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s = &dg00x->tx_stream; |
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} else { |
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substream->runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; |
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s = &dg00x->rx_stream; |
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} |
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hw->channels_min = 10; |
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hw->channels_max = 18; |
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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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err = snd_pcm_hw_rule_add(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_CHANNELS, |
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hw_rule_channels, NULL, |
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SNDRV_PCM_HW_PARAM_RATE, -1); |
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if (err < 0) |
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return err; |
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err = snd_pcm_hw_rule_add(substream->runtime, 0, |
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SNDRV_PCM_HW_PARAM_RATE, |
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hw_rule_rate, NULL, |
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SNDRV_PCM_HW_PARAM_CHANNELS, -1); |
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if (err < 0) |
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return err; |
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return amdtp_dot_add_pcm_hw_constraints(s, substream->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_dg00x *dg00x = substream->private_data; |
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struct amdtp_domain *d = &dg00x->domain; |
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enum snd_dg00x_clock clock; |
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bool detect; |
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int err; |
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err = snd_dg00x_stream_lock_try(dg00x); |
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if (err < 0) |
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return err; |
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err = pcm_init_hw_params(dg00x, substream); |
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if (err < 0) |
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goto err_locked; |
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/* Check current clock source. */ |
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err = snd_dg00x_stream_get_clock(dg00x, &clock); |
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if (err < 0) |
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goto err_locked; |
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if (clock != SND_DG00X_CLOCK_INTERNAL) { |
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err = snd_dg00x_stream_check_external_clock(dg00x, &detect); |
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if (err < 0) |
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goto err_locked; |
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if (!detect) { |
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err = -EBUSY; |
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goto err_locked; |
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} |
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} |
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mutex_lock(&dg00x->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_DG00X_CLOCK_INTERNAL) || |
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(dg00x->substreams_counter > 0 && d->events_per_period > 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_dg00x_stream_get_external_rate(dg00x, &rate); |
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if (err < 0) { |
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mutex_unlock(&dg00x->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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if (frames_per_period > 0) { |
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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(&dg00x->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(&dg00x->mutex); |
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goto err_locked; |
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} |
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} |
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} |
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mutex_unlock(&dg00x->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_dg00x_stream_lock_release(dg00x); |
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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_dg00x *dg00x = substream->private_data; |
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snd_dg00x_stream_lock_release(dg00x); |
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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_dg00x *dg00x = 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(&dg00x->mutex); |
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err = snd_dg00x_stream_reserve_duplex(dg00x, rate, |
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frames_per_period, frames_per_buffer); |
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if (err >= 0) |
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++dg00x->substreams_counter; |
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mutex_unlock(&dg00x->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_dg00x *dg00x = substream->private_data; |
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mutex_lock(&dg00x->mutex); |
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) |
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--dg00x->substreams_counter; |
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snd_dg00x_stream_stop_duplex(dg00x); |
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mutex_unlock(&dg00x->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_dg00x *dg00x = substream->private_data; |
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int err; |
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mutex_lock(&dg00x->mutex); |
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err = snd_dg00x_stream_start_duplex(dg00x); |
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if (err >= 0) |
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amdtp_stream_pcm_prepare(&dg00x->tx_stream); |
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mutex_unlock(&dg00x->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_dg00x *dg00x = substream->private_data; |
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int err; |
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mutex_lock(&dg00x->mutex); |
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err = snd_dg00x_stream_start_duplex(dg00x); |
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if (err >= 0) { |
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amdtp_stream_pcm_prepare(&dg00x->rx_stream); |
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amdtp_dot_reset(&dg00x->rx_stream); |
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} |
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mutex_unlock(&dg00x->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_dg00x *dg00x = 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(&dg00x->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(&dg00x->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_dg00x *dg00x = 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(&dg00x->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(&dg00x->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_dg00x *dg00x = sbstrm->private_data; |
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return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->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_dg00x *dg00x = sbstrm->private_data; |
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return amdtp_domain_stream_pcm_pointer(&dg00x->domain, &dg00x->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_dg00x *dg00x = substream->private_data; |
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return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->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_dg00x *dg00x = substream->private_data; |
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return amdtp_domain_stream_pcm_ack(&dg00x->domain, &dg00x->rx_stream); |
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} |
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int snd_dg00x_create_pcm_devices(struct snd_dg00x *dg00x) |
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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(dg00x->card, dg00x->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 = dg00x; |
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snprintf(pcm->name, sizeof(pcm->name), |
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"%s PCM", dg00x->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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