2014-11-28 22:59:15 +07:00
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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 <clemens@ladisch.de>
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* Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
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*
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* Licensed under the terms of the GNU General Public License, version 2.
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*/
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#include "dice.h"
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2016-02-08 20:54:15 +07:00
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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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struct amdtp_stream *stream)
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2014-11-28 22:59:15 +07:00
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{
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2014-11-28 22:59:18 +07:00
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struct snd_pcm_hardware *hw = &runtime->hw;
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2016-02-08 20:54:15 +07:00
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unsigned int rate;
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__be32 reg[2];
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int err;
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2014-11-28 22:59:15 +07:00
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2016-02-08 20:54:15 +07:00
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/*
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* Retrieve current Multi Bit Linear Audio data channel and limit to
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* it.
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*/
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if (stream == &dice->tx_stream) {
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err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO,
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reg, sizeof(reg));
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} else {
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err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO,
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reg, sizeof(reg));
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}
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if (err < 0)
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return err;
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2014-11-28 22:59:15 +07:00
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2016-02-08 20:54:15 +07:00
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hw->channels_min = hw->channels_max = be32_to_cpu(reg[0]);
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2014-11-28 22:59:18 +07:00
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2016-02-08 20:54:15 +07:00
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/* Retrieve current sampling transfer frequency and limit to it. */
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err = snd_dice_transaction_get_rate(dice, &rate);
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if (err < 0)
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return err;
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2014-11-28 22:59:18 +07:00
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2016-02-08 20:54:15 +07:00
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hw->rates = snd_pcm_rate_to_rate_bit(rate);
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2014-11-28 22:59:15 +07:00
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snd_pcm_limit_hw_rates(runtime);
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2016-02-08 20:54:15 +07:00
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return 0;
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2014-11-28 22:59:18 +07:00
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}
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2014-11-28 22:59:15 +07:00
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2014-11-28 22:59:18 +07:00
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static void limit_period_and_buffer(struct snd_pcm_hardware *hw)
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{
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hw->periods_min = 2; /* SNDRV_PCM_INFO_BATCH */
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hw->periods_max = UINT_MAX;
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hw->period_bytes_min = 4 * hw->channels_max; /* byte for a frame */
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/* Just to prevent from allocating much pages. */
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hw->period_bytes_max = hw->period_bytes_min * 2048;
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hw->buffer_bytes_max = hw->period_bytes_max * hw->periods_min;
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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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2014-12-08 22:10:38 +07:00
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struct amdtp_stream *stream;
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2014-11-28 22:59:18 +07:00
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int err;
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hw->info = SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID |
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SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_INTERLEAVED |
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2014-12-08 22:10:38 +07:00
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SNDRV_PCM_INFO_JOINT_DUPLEX |
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2014-11-28 22:59:18 +07:00
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SNDRV_PCM_INFO_BLOCK_TRANSFER;
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2014-12-08 22:10:38 +07:00
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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2015-09-19 09:22:01 +07:00
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hw->formats = AM824_IN_PCM_FORMAT_BITS;
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2014-12-08 22:10:38 +07:00
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stream = &dice->tx_stream;
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} else {
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2015-09-19 09:22:01 +07:00
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hw->formats = AM824_OUT_PCM_FORMAT_BITS;
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2014-12-08 22:10:38 +07:00
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stream = &dice->rx_stream;
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}
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2016-02-08 20:54:15 +07:00
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err = limit_channels_and_rates(dice, runtime, stream);
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2014-11-28 22:59:15 +07:00
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if (err < 0)
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2016-02-08 20:54:15 +07:00
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return err;
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limit_period_and_buffer(hw);
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2014-11-28 22:59:15 +07:00
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2016-02-08 20:54:15 +07:00
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return amdtp_am824_add_pcm_hw_constraints(stream, runtime);
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2014-11-28 22:59:18 +07:00
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}
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2014-11-28 22:59:15 +07:00
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2014-11-28 22:59:18 +07:00
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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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int err;
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2014-11-28 22:59:15 +07:00
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2014-11-28 22:59:18 +07:00
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err = snd_dice_stream_lock_try(dice);
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if (err < 0)
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goto end;
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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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2014-12-08 22:10:37 +07:00
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snd_pcm_set_sync(substream);
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2014-11-28 22:59:18 +07:00
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end:
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return err;
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err_locked:
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2014-11-28 22:59:15 +07:00
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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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2014-12-08 22:10:38 +07:00
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static int capture_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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2015-08-29 08:38:46 +07:00
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int err;
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err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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if (err < 0)
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return err;
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2014-12-08 22:10:38 +07:00
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&dice->mutex);
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dice->substreams_counter++;
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mutex_unlock(&dice->mutex);
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}
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2015-09-19 09:22:00 +07:00
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amdtp_am824_set_pcm_format(&dice->tx_stream, params_format(hw_params));
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2014-12-08 22:10:38 +07:00
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2015-08-29 08:38:46 +07:00
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return 0;
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2014-12-08 22:10:38 +07:00
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}
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2014-11-28 22:59:15 +07:00
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static int playback_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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2015-08-29 08:38:46 +07:00
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int err;
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err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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if (err < 0)
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return err;
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2014-12-08 22:10:38 +07:00
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&dice->mutex);
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dice->substreams_counter++;
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mutex_unlock(&dice->mutex);
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}
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2015-09-19 09:22:00 +07:00
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amdtp_am824_set_pcm_format(&dice->rx_stream, params_format(hw_params));
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2014-11-28 22:59:15 +07:00
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2015-08-29 08:38:46 +07:00
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return 0;
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2014-11-28 22:59:15 +07:00
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}
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2014-12-08 22:10:38 +07:00
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static int capture_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 snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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2014-11-28 22:59:15 +07:00
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static int playback_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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2014-12-08 22:10:38 +07:00
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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dice->substreams_counter--;
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2014-12-08 22:10:36 +07:00
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snd_dice_stream_stop_duplex(dice);
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2014-12-08 22:10:38 +07:00
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2014-11-28 22:59:15 +07:00
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mutex_unlock(&dice->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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2014-12-08 22:10:38 +07:00
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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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int err;
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mutex_lock(&dice->mutex);
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err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
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mutex_unlock(&dice->mutex);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&dice->tx_stream);
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return 0;
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}
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2014-11-28 22:59:15 +07:00
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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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int err;
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mutex_lock(&dice->mutex);
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2014-12-08 22:10:36 +07:00
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err = snd_dice_stream_start_duplex(dice, substream->runtime->rate);
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2014-11-28 22:59:15 +07:00
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mutex_unlock(&dice->mutex);
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2014-12-08 22:10:35 +07:00
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if (err >= 0)
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amdtp_stream_pcm_prepare(&dice->rx_stream);
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2014-11-28 22:59:15 +07:00
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2014-12-08 22:10:35 +07:00
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return err;
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2014-11-28 22:59:15 +07:00
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}
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2014-12-08 22:10:38 +07:00
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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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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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amdtp_stream_pcm_trigger(&dice->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(&dice->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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2014-11-28 22:59:15 +07:00
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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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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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amdtp_stream_pcm_trigger(&dice->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(&dice->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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2014-12-08 22:10:38 +07:00
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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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return amdtp_stream_pcm_pointer(&dice->tx_stream);
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}
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2014-11-28 22:59:15 +07:00
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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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return amdtp_stream_pcm_pointer(&dice->rx_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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2014-12-08 22:10:38 +07:00
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static struct snd_pcm_ops capture_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = capture_hw_params,
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.hw_free = capture_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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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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};
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2014-11-28 22:59:15 +07:00
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static struct snd_pcm_ops playback_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.ioctl = snd_pcm_lib_ioctl,
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.hw_params = playback_hw_params,
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.hw_free = playback_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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.page = snd_pcm_lib_get_vmalloc_page,
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.mmap = snd_pcm_lib_mmap_vmalloc,
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};
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2016-02-08 20:54:18 +07:00
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__be32 reg;
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2014-11-28 22:59:15 +07:00
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struct snd_pcm *pcm;
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2016-02-08 20:54:18 +07:00
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unsigned int capture, playback;
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2014-11-28 22:59:15 +07:00
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int err;
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2016-02-08 20:54:18 +07:00
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/*
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* Check whether PCM substreams are required.
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*
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* TODO: in the case that any PCM substreams are not avail at a certain
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* sampling transfer frequency?
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*/
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err = snd_dice_transaction_read_tx(dice, TX_NUMBER_AUDIO,
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®, sizeof(reg));
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if (err < 0)
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return err;
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if (be32_to_cpu(reg) > 0)
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capture = 1;
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err = snd_dice_transaction_read_rx(dice, RX_NUMBER_AUDIO,
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®, sizeof(reg));
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if (err < 0)
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return err;
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if (be32_to_cpu(reg) > 0)
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playback = 1;
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2014-12-08 22:10:38 +07:00
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err = snd_pcm_new(dice->card, "DICE", 0, playback, capture, &pcm);
|
2014-11-28 22:59:15 +07:00
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
pcm->private_data = dice;
|
|
|
|
strcpy(pcm->name, dice->card->shortname);
|
2014-12-08 22:10:38 +07:00
|
|
|
|
|
|
|
if (capture > 0)
|
|
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &capture_ops);
|
|
|
|
|
|
|
|
if (playback > 0)
|
|
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
|
2014-11-28 22:59:15 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|