423 lines
11 KiB
C
423 lines
11 KiB
C
/*
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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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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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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 i, rate, mode, *pcm_channels;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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pcm_channels = dice->tx_channels;
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else
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pcm_channels = dice->rx_channels;
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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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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 i, rate, mode, *pcm_channels;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
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pcm_channels = dice->tx_channels;
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else
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pcm_channels = dice->rx_channels;
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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 void limit_channels_and_rates(struct snd_dice *dice,
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struct snd_pcm_runtime *runtime,
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unsigned int *pcm_channels)
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{
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struct snd_pcm_hardware *hw = &runtime->hw;
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unsigned int i, rate, mode;
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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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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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if (pcm_channels[mode] == 0)
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continue;
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hw->channels_min = min(hw->channels_min, pcm_channels[mode]);
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hw->channels_max = max(hw->channels_max, pcm_channels[mode]);
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}
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snd_pcm_limit_hw_rates(runtime);
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}
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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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struct amdtp_stream *stream;
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unsigned int *pcm_channels;
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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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SNDRV_PCM_INFO_JOINT_DUPLEX |
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SNDRV_PCM_INFO_BLOCK_TRANSFER;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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hw->formats = AMDTP_IN_PCM_FORMAT_BITS;
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stream = &dice->tx_stream;
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pcm_channels = dice->tx_channels;
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} else {
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hw->formats = AMDTP_OUT_PCM_FORMAT_BITS;
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stream = &dice->rx_stream;
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pcm_channels = dice->rx_channels;
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}
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limit_channels_and_rates(dice, runtime, pcm_channels);
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limit_period_and_buffer(hw);
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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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goto end;
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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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goto end;
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err = amdtp_stream_add_pcm_hw_constraints(stream, runtime);
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end:
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return err;
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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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unsigned int source, rate;
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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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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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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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/*
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* When source of clock is not internal or any PCM streams are running,
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* available sampling rate is limited at current sampling rate.
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*/
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if (!internal ||
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amdtp_stream_pcm_running(&dice->tx_stream) ||
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amdtp_stream_pcm_running(&dice->rx_stream)) {
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err = snd_dice_transaction_get_rate(dice, &rate);
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if (err < 0)
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goto err_locked;
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substream->runtime->hw.rate_min = rate;
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substream->runtime->hw.rate_max = rate;
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}
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snd_pcm_set_sync(substream);
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end:
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return err;
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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 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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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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amdtp_stream_set_pcm_format(&dice->tx_stream,
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params_format(hw_params));
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return snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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}
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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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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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amdtp_stream_set_pcm_format(&dice->rx_stream,
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params_format(hw_params));
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return snd_pcm_lib_alloc_vmalloc_buffer(substream,
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params_buffer_bytes(hw_params));
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}
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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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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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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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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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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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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->rx_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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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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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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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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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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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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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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struct snd_pcm *pcm;
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unsigned int i, capture, playback;
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int err;
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capture = playback = 0;
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for (i = 0; i < 3; i++) {
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if (dice->tx_channels[i] > 0)
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capture = 1;
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if (dice->rx_channels[i] > 0)
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playback = 1;
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}
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err = snd_pcm_new(dice->card, "DICE", 0, playback, capture, &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, &capture_ops);
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if (playback > 0)
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &playback_ops);
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return 0;
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}
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