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459 lines
12 KiB
459 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* dice_pcm.c - a part of driver for DICE based devices |
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* |
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* Copyright (c) Clemens Ladisch <[email protected]> |
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* Copyright (c) 2014 Takashi Sakamoto <[email protected]> |
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*/ |
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#include "dice.h" |
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static int dice_rate_constraint(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_pcm_substream *substream = rule->private; |
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struct snd_dice *dice = substream->private_data; |
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unsigned int index = substream->pcm->device; |
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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 *r = |
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hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); |
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struct snd_interval rates = { |
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.min = UINT_MAX, .max = 0, .integer = 1 |
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}; |
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unsigned int *pcm_channels; |
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enum snd_dice_rate_mode mode; |
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unsigned int i, rate; |
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
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pcm_channels = dice->tx_pcm_chs[index]; |
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else |
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pcm_channels = dice->rx_pcm_chs[index]; |
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for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { |
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rate = snd_dice_rates[i]; |
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if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0) |
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continue; |
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if (!snd_interval_test(c, pcm_channels[mode])) |
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continue; |
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rates.min = min(rates.min, rate); |
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rates.max = max(rates.max, rate); |
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} |
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return snd_interval_refine(r, &rates); |
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} |
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static int dice_channels_constraint(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_pcm_substream *substream = rule->private; |
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struct snd_dice *dice = substream->private_data; |
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unsigned int index = substream->pcm->device; |
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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 *c = |
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hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); |
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struct snd_interval channels = { |
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.min = UINT_MAX, .max = 0, .integer = 1 |
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}; |
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unsigned int *pcm_channels; |
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enum snd_dice_rate_mode mode; |
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unsigned int i, rate; |
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
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pcm_channels = dice->tx_pcm_chs[index]; |
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else |
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pcm_channels = dice->rx_pcm_chs[index]; |
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for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { |
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rate = snd_dice_rates[i]; |
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if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0) |
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continue; |
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if (!snd_interval_test(r, rate)) |
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continue; |
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channels.min = min(channels.min, pcm_channels[mode]); |
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channels.max = max(channels.max, pcm_channels[mode]); |
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} |
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return snd_interval_refine(c, &channels); |
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} |
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static int limit_channels_and_rates(struct snd_dice *dice, |
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struct snd_pcm_runtime *runtime, |
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enum amdtp_stream_direction dir, |
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unsigned int index) |
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{ |
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struct snd_pcm_hardware *hw = &runtime->hw; |
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unsigned int *pcm_channels; |
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unsigned int i; |
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if (dir == AMDTP_IN_STREAM) |
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pcm_channels = dice->tx_pcm_chs[index]; |
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else |
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pcm_channels = dice->rx_pcm_chs[index]; |
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hw->channels_min = UINT_MAX; |
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hw->channels_max = 0; |
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for (i = 0; i < ARRAY_SIZE(snd_dice_rates); ++i) { |
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enum snd_dice_rate_mode mode; |
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unsigned int rate, channels; |
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rate = snd_dice_rates[i]; |
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if (snd_dice_stream_get_rate_mode(dice, rate, &mode) < 0) |
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continue; |
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hw->rates |= snd_pcm_rate_to_rate_bit(rate); |
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channels = pcm_channels[mode]; |
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if (channels == 0) |
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continue; |
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hw->channels_min = min(hw->channels_min, channels); |
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hw->channels_max = max(hw->channels_max, channels); |
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} |
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snd_pcm_limit_hw_rates(runtime); |
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return 0; |
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} |
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static int init_hw_info(struct snd_dice *dice, |
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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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unsigned int index = substream->pcm->device; |
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enum amdtp_stream_direction dir; |
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struct amdtp_stream *stream; |
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int err; |
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
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hw->formats = AM824_IN_PCM_FORMAT_BITS; |
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dir = AMDTP_IN_STREAM; |
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stream = &dice->tx_stream[index]; |
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} else { |
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hw->formats = AM824_OUT_PCM_FORMAT_BITS; |
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dir = AMDTP_OUT_STREAM; |
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stream = &dice->rx_stream[index]; |
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} |
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err = limit_channels_and_rates(dice, substream->runtime, dir, |
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index); |
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if (err < 0) |
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return err; |
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err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, |
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dice_rate_constraint, substream, |
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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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err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, |
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dice_channels_constraint, substream, |
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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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return amdtp_am824_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_dice *dice = substream->private_data; |
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struct amdtp_domain *d = &dice->domain; |
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unsigned int source; |
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bool internal; |
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int err; |
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err = snd_dice_stream_lock_try(dice); |
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if (err < 0) |
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return err; |
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err = init_hw_info(dice, substream); |
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if (err < 0) |
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goto err_locked; |
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err = snd_dice_transaction_get_clock_source(dice, &source); |
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if (err < 0) |
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goto err_locked; |
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switch (source) { |
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case CLOCK_SOURCE_AES1: |
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case CLOCK_SOURCE_AES2: |
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case CLOCK_SOURCE_AES3: |
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case CLOCK_SOURCE_AES4: |
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case CLOCK_SOURCE_AES_ANY: |
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case CLOCK_SOURCE_ADAT: |
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case CLOCK_SOURCE_TDIF: |
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case CLOCK_SOURCE_WC: |
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internal = false; |
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break; |
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default: |
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internal = true; |
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break; |
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} |
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mutex_lock(&dice->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 (!internal || |
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(dice->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_dice_transaction_get_rate(dice, &rate); |
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if (err < 0) { |
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mutex_unlock(&dice->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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// For double_pcm_frame quirk. |
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if (rate > 96000) { |
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frames_per_period *= 2; |
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frames_per_buffer *= 2; |
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} |
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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(&dice->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(&dice->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(&dice->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_dice_stream_lock_release(dice); |
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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_dice *dice = substream->private_data; |
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snd_dice_stream_lock_release(dice); |
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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_dice *dice = 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 events_per_period = params_period_size(hw_params); |
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unsigned int events_per_buffer = params_buffer_size(hw_params); |
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mutex_lock(&dice->mutex); |
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// For double_pcm_frame quirk. |
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if (rate > 96000) { |
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events_per_period /= 2; |
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events_per_buffer /= 2; |
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} |
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err = snd_dice_stream_reserve_duplex(dice, rate, |
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events_per_period, events_per_buffer); |
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if (err >= 0) |
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++dice->substreams_counter; |
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mutex_unlock(&dice->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_dice *dice = substream->private_data; |
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mutex_lock(&dice->mutex); |
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN) |
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--dice->substreams_counter; |
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snd_dice_stream_stop_duplex(dice); |
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mutex_unlock(&dice->mutex); |
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return 0; |
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} |
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static int capture_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; |
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int err; |
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mutex_lock(&dice->mutex); |
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err = snd_dice_stream_start_duplex(dice); |
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mutex_unlock(&dice->mutex); |
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if (err >= 0) |
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amdtp_stream_pcm_prepare(stream); |
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return 0; |
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} |
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static int playback_prepare(struct snd_pcm_substream *substream) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; |
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int err; |
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mutex_lock(&dice->mutex); |
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err = snd_dice_stream_start_duplex(dice); |
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mutex_unlock(&dice->mutex); |
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if (err >= 0) |
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amdtp_stream_pcm_prepare(stream); |
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return err; |
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} |
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static int capture_trigger(struct snd_pcm_substream *substream, int cmd) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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amdtp_stream_pcm_trigger(stream, substream); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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amdtp_stream_pcm_trigger(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 playback_trigger(struct snd_pcm_substream *substream, int cmd) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; |
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switch (cmd) { |
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case SNDRV_PCM_TRIGGER_START: |
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amdtp_stream_pcm_trigger(stream, substream); |
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break; |
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case SNDRV_PCM_TRIGGER_STOP: |
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amdtp_stream_pcm_trigger(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 capture_pointer(struct snd_pcm_substream *substream) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; |
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return amdtp_domain_stream_pcm_pointer(&dice->domain, stream); |
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} |
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static snd_pcm_uframes_t playback_pointer(struct snd_pcm_substream *substream) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; |
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return amdtp_domain_stream_pcm_pointer(&dice->domain, stream); |
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} |
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static int capture_ack(struct snd_pcm_substream *substream) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->tx_stream[substream->pcm->device]; |
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return amdtp_domain_stream_pcm_ack(&dice->domain, stream); |
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} |
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static int playback_ack(struct snd_pcm_substream *substream) |
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{ |
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struct snd_dice *dice = substream->private_data; |
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struct amdtp_stream *stream = &dice->rx_stream[substream->pcm->device]; |
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return amdtp_domain_stream_pcm_ack(&dice->domain, stream); |
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} |
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int snd_dice_create_pcm(struct snd_dice *dice) |
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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 = capture_prepare, |
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.trigger = capture_trigger, |
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.pointer = capture_pointer, |
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.ack = 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 = playback_prepare, |
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.trigger = playback_trigger, |
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.pointer = playback_pointer, |
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.ack = playback_ack, |
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}; |
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struct snd_pcm *pcm; |
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unsigned int capture, playback; |
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int i, j; |
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int err; |
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for (i = 0; i < MAX_STREAMS; i++) { |
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capture = playback = 0; |
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for (j = 0; j < SND_DICE_RATE_MODE_COUNT; ++j) { |
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if (dice->tx_pcm_chs[i][j] > 0) |
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capture = 1; |
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if (dice->rx_pcm_chs[i][j] > 0) |
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playback = 1; |
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} |
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err = snd_pcm_new(dice->card, "DICE", i, playback, capture, |
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&pcm); |
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if (err < 0) |
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return err; |
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pcm->private_data = dice; |
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strcpy(pcm->name, dice->card->shortname); |
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if (capture > 0) |
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
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&capture_ops); |
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if (playback > 0) |
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
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&playback_ops); |
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snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, |
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NULL, 0, 0); |
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} |
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return 0; |
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}
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