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![Takashi Iwai](/assets/img/avatar_default.png)
All the PCM ioctl ops of ALSA FireWire drivers do nothing but calling
the default handler.
Now PCM core accepts NULL as the default ioctl ops(*), so let's drop
altogether.
(*) commit fc033cbf6f
("ALSA: pcm: Allow NULL ioctl ops")
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191210061145.24641-6-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
400 lines
9.6 KiB
C
400 lines
9.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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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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#include "ff.h"
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static int hw_rule_rate(struct snd_pcm_hw_params *params,
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struct snd_pcm_hw_rule *rule)
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{
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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;
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for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
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enum snd_ff_stream_mode mode;
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int err;
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err = snd_ff_stream_get_multiplier_mode(i, &mode);
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if (err < 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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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;
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for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); i++) {
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enum snd_ff_stream_mode mode;
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int err;
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err = snd_ff_stream_get_multiplier_mode(i, &mode);
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if (err < 0)
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continue;
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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 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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enum snd_ff_stream_mode mode;
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int err;
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err = snd_ff_stream_get_multiplier_mode(i, &mode);
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if (err < 0)
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continue;
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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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struct amdtp_domain *d = &ff->domain;
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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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mutex_lock(&ff->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 (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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// The unit is configured at sampling frequency which packet
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// streaming engine can't support.
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if (i >= CIP_SFC_COUNT) {
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mutex_unlock(&ff->mutex);
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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 (ff->substreams_counter > 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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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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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(&ff->mutex);
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goto release_lock;
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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(&ff->mutex);
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goto release_lock;
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}
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}
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}
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mutex_unlock(&ff->mutex);
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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_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 = 0;
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if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
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unsigned int rate = params_rate(hw_params);
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unsigned int frames_per_period = params_period_size(hw_params);
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unsigned int frames_per_buffer = params_buffer_size(hw_params);
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mutex_lock(&ff->mutex);
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err = snd_ff_stream_reserve_duplex(ff, rate, frames_per_period,
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frames_per_buffer);
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if (err >= 0)
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++ff->substreams_counter;
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mutex_unlock(&ff->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_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 0;
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}
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static int pcm_capture_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_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_domain_stream_pcm_pointer(&ff->domain, &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_domain_stream_pcm_pointer(&ff->domain, &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_domain_stream_pcm_ack(&ff->domain, &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_domain_stream_pcm_ack(&ff->domain, &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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.hw_params = pcm_hw_params,
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.hw_free = pcm_hw_free,
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.prepare = pcm_capture_prepare,
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.trigger = pcm_capture_trigger,
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.pointer = pcm_capture_pointer,
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.ack = pcm_capture_ack,
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};
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static const struct snd_pcm_ops pcm_playback_ops = {
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.open = pcm_open,
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.close = pcm_close,
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.hw_params = pcm_hw_params,
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.hw_free = pcm_hw_free,
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.prepare = pcm_playback_prepare,
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.trigger = pcm_playback_trigger,
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.pointer = pcm_playback_pointer,
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.ack = pcm_playback_ack,
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};
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struct snd_pcm *pcm;
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int err;
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err = snd_pcm_new(ff->card, ff->card->driver, 0, 1, 1, &pcm);
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if (err < 0)
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return err;
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pcm->private_data = ff;
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snprintf(pcm->name, sizeof(pcm->name),
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"%s PCM", ff->card->shortname);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &pcm_playback_ops);
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snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pcm_capture_ops);
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snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);
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return 0;
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}
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