402 lines
9.5 KiB
C
402 lines
9.5 KiB
C
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/*
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* ff-pcm.c - a part of driver for RME Fireface series
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*
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* Copyright (c) 2015-2017 Takashi Sakamoto
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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 "ff.h"
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static inline unsigned int get_multiplier_mode_with_index(unsigned int index)
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{
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return ((int)index - 1) / 2;
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}
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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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const unsigned int *pcm_channels = rule->private;
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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, mode;
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for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
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mode = get_multiplier_mode_with_index(i);
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if (!snd_interval_test(c, pcm_channels[mode]))
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continue;
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t.min = min(t.min, amdtp_rate_table[i]);
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t.max = max(t.max, amdtp_rate_table[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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const unsigned int *pcm_channels = rule->private;
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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, mode;
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for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
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mode = get_multiplier_mode_with_index(i);
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if (!snd_interval_test(r, amdtp_rate_table[i]))
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continue;
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t.min = min(t.min, pcm_channels[mode]);
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t.max = max(t.max, pcm_channels[mode]);
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}
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return snd_interval_refine(c, &t);
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}
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static void limit_channels_and_rates(struct snd_pcm_hardware *hw,
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const unsigned int *pcm_channels)
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{
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unsigned int mode;
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unsigned int rate, channels;
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int i;
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hw->channels_min = UINT_MAX;
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hw->channels_max = 0;
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hw->rate_min = UINT_MAX;
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hw->rate_max = 0;
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for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
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mode = get_multiplier_mode_with_index(i);
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channels = pcm_channels[mode];
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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, channels);
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hw->channels_max = max(hw->channels_max, channels);
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rate = amdtp_rate_table[i];
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hw->rates |= snd_pcm_rate_to_rate_bit(rate);
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hw->rate_min = min(hw->rate_min, rate);
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hw->rate_max = max(hw->rate_max, rate);
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}
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}
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static int pcm_init_hw_params(struct snd_ff *ff,
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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 amdtp_stream *s;
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const unsigned int *pcm_channels;
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int err;
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if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
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s = &ff->tx_stream;
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pcm_channels = ff->spec->pcm_capture_channels;
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} else {
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runtime->hw.formats = SNDRV_PCM_FMTBIT_S32;
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s = &ff->rx_stream;
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pcm_channels = ff->spec->pcm_playback_channels;
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}
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limit_channels_and_rates(&runtime->hw, pcm_channels);
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err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
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hw_rule_channels, (void *)pcm_channels,
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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(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
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hw_rule_rate, (void *)pcm_channels,
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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_ff_add_pcm_hw_constraints(s, 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_ff *ff = substream->private_data;
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unsigned int rate;
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enum snd_ff_clock_src src;
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int i, err;
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err = snd_ff_stream_lock_try(ff);
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if (err < 0)
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return err;
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err = pcm_init_hw_params(ff, substream);
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if (err < 0)
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goto release_lock;
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err = ff->spec->protocol->get_clock(ff, &rate, &src);
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if (err < 0)
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goto release_lock;
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if (src != SND_FF_CLOCK_SRC_INTERNAL) {
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for (i = 0; i < CIP_SFC_COUNT; ++i) {
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if (amdtp_rate_table[i] == rate)
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break;
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}
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/*
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* The unit is configured at sampling frequency which packet
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* streaming engine can't support.
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*/
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if (i >= CIP_SFC_COUNT) {
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err = -EIO;
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goto release_lock;
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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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} else {
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if (amdtp_stream_pcm_running(&ff->rx_stream) ||
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amdtp_stream_pcm_running(&ff->tx_stream)) {
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rate = amdtp_rate_table[ff->rx_stream.sfc];
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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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}
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snd_pcm_set_sync(substream);
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return 0;
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release_lock:
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snd_ff_stream_lock_release(ff);
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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_ff *ff = substream->private_data;
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snd_ff_stream_lock_release(ff);
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return 0;
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}
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static int pcm_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_ff *ff = substream->private_data;
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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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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&ff->mutex);
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ff->substreams_counter++;
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mutex_unlock(&ff->mutex);
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}
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return 0;
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}
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static int pcm_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_ff *ff = substream->private_data;
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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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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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mutex_lock(&ff->mutex);
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ff->substreams_counter++;
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mutex_unlock(&ff->mutex);
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}
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return 0;
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}
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static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_ff *ff = substream->private_data;
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mutex_lock(&ff->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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ff->substreams_counter--;
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snd_ff_stream_stop_duplex(ff);
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mutex_unlock(&ff->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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}
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static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
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{
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struct snd_ff *ff = substream->private_data;
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mutex_lock(&ff->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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ff->substreams_counter--;
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snd_ff_stream_stop_duplex(ff);
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mutex_unlock(&ff->mutex);
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return snd_pcm_lib_free_vmalloc_buffer(substream);
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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_ff *ff = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&ff->mutex);
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err = snd_ff_stream_start_duplex(ff, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&ff->tx_stream);
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mutex_unlock(&ff->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_ff *ff = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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int err;
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mutex_lock(&ff->mutex);
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err = snd_ff_stream_start_duplex(ff, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&ff->rx_stream);
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mutex_unlock(&ff->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_ff *ff = 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(&ff->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(&ff->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_ff *ff = 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(&ff->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(&ff->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_ff *ff = sbstrm->private_data;
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return amdtp_stream_pcm_pointer(&ff->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_ff *ff = sbstrm->private_data;
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return amdtp_stream_pcm_pointer(&ff->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_ff *ff = substream->private_data;
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return amdtp_stream_pcm_ack(&ff->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_ff *ff = substream->private_data;
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return amdtp_stream_pcm_ack(&ff->rx_stream);
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}
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int snd_ff_create_pcm_devices(struct snd_ff *ff)
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{
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static const struct snd_pcm_ops pcm_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 = pcm_capture_hw_params,
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.hw_free = pcm_capture_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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.page = snd_pcm_lib_get_vmalloc_page,
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};
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static const struct snd_pcm_ops pcm_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 = pcm_playback_hw_params,
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.hw_free = pcm_playback_hw_free,
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|
|
.prepare = pcm_playback_prepare,
|
||
|
|
.trigger = pcm_playback_trigger,
|
||
|
|
.pointer = pcm_playback_pointer,
|
||
|
|
.ack = pcm_playback_ack,
|
||
|
|
.page = snd_pcm_lib_get_vmalloc_page,
|
||
|
|
};
|
||
|
|
struct snd_pcm *pcm;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
err = snd_pcm_new(ff->card, ff->card->driver, 0, 1, 1, &pcm);
|
||
|
|
if (err < 0)
|
||
|
|
return err;
|
||
|
|
|
||
|
|
pcm->private_data = ff;
|
||
|
|
snprintf(pcm->name, sizeof(pcm->name),
|
||
|
|
"%s PCM", ff->card->shortname);
|
||
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
|
||
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|