![Julia Lawall](/assets/img/avatar_default.png)
Check for snd_pcm_ops structures that are only stored in the ops field of a snd_soc_platform_driver structure or passed as the third argument to snd_pcm_set_ops. The corresponding field or parameter is declared const, so snd_pcm_ops structures that have this property can be declared as const also. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r disable optional_qualifier@ identifier i; position p; @@ static struct snd_pcm_ops i@p = { ... }; @ok1@ identifier r.i; struct snd_soc_platform_driver e; position p; @@ e.ops = &i@p; @ok2@ identifier r.i; expression e1, e2; position p; @@ snd_pcm_set_ops(e1, e2, &i@p) @bad@ position p != {r.p,ok1.p,ok2.p}; identifier r.i; struct snd_pcm_ops e; @@ e@i@p @depends on !bad disable optional_qualifier@ identifier r.i; @@ static +const struct snd_pcm_ops i = { ... }; // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
313 lines
7.4 KiB
C
313 lines
7.4 KiB
C
/*
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* tascam-pcm.c - a part of driver for TASCAM FireWire series
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*
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* Copyright (c) 2015 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 "tascam.h"
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static void set_buffer_params(struct snd_pcm_hardware *hw)
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{
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hw->period_bytes_min = 4 * hw->channels_min;
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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 * 2;
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hw->periods_min = 2;
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hw->periods_max = UINT_MAX;
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}
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static int pcm_init_hw_params(struct snd_tscm *tscm,
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struct snd_pcm_substream *substream)
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{
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static const struct snd_pcm_hardware hardware = {
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.info = SNDRV_PCM_INFO_BATCH |
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SNDRV_PCM_INFO_BLOCK_TRANSFER |
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SNDRV_PCM_INFO_INTERLEAVED |
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SNDRV_PCM_INFO_JOINT_DUPLEX |
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SNDRV_PCM_INFO_MMAP |
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SNDRV_PCM_INFO_MMAP_VALID,
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.rates = SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000,
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.rate_min = 44100,
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.rate_max = 96000,
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.channels_min = 10,
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.channels_max = 18,
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};
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct amdtp_stream *stream;
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unsigned int pcm_channels;
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runtime->hw = hardware;
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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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stream = &tscm->tx_stream;
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pcm_channels = tscm->spec->pcm_capture_analog_channels;
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} else {
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runtime->hw.formats =
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SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_S32;
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stream = &tscm->rx_stream;
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pcm_channels = tscm->spec->pcm_playback_analog_channels;
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}
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if (tscm->spec->has_adat)
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pcm_channels += 8;
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if (tscm->spec->has_spdif)
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pcm_channels += 2;
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runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels;
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set_buffer_params(&runtime->hw);
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return amdtp_tscm_add_pcm_hw_constraints(stream, runtime);
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}
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static int pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_tscm *tscm = substream->private_data;
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enum snd_tscm_clock clock;
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unsigned int rate;
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int err;
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err = snd_tscm_stream_lock_try(tscm);
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if (err < 0)
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goto end;
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err = pcm_init_hw_params(tscm, substream);
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if (err < 0)
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goto err_locked;
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err = snd_tscm_stream_get_clock(tscm, &clock);
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if (clock != SND_TSCM_CLOCK_INTERNAL ||
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amdtp_stream_pcm_running(&tscm->rx_stream) ||
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amdtp_stream_pcm_running(&tscm->tx_stream)) {
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err = snd_tscm_stream_get_rate(tscm, &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_tscm_stream_lock_release(tscm);
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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_tscm *tscm = substream->private_data;
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snd_tscm_stream_lock_release(tscm);
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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_tscm *tscm = 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(&tscm->mutex);
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tscm->substreams_counter++;
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mutex_unlock(&tscm->mutex);
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}
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amdtp_tscm_set_pcm_format(&tscm->tx_stream, params_format(hw_params));
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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_tscm *tscm = 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(&tscm->mutex);
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tscm->substreams_counter++;
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mutex_unlock(&tscm->mutex);
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}
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amdtp_tscm_set_pcm_format(&tscm->rx_stream, params_format(hw_params));
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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_tscm *tscm = substream->private_data;
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mutex_lock(&tscm->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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tscm->substreams_counter--;
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snd_tscm_stream_stop_duplex(tscm);
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mutex_unlock(&tscm->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_tscm *tscm = substream->private_data;
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mutex_lock(&tscm->mutex);
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if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
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tscm->substreams_counter--;
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snd_tscm_stream_stop_duplex(tscm);
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mutex_unlock(&tscm->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_tscm *tscm = 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(&tscm->mutex);
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err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&tscm->tx_stream);
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mutex_unlock(&tscm->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_tscm *tscm = 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(&tscm->mutex);
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err = snd_tscm_stream_start_duplex(tscm, runtime->rate);
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if (err >= 0)
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amdtp_stream_pcm_prepare(&tscm->rx_stream);
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mutex_unlock(&tscm->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_tscm *tscm = 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(&tscm->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(&tscm->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_tscm *tscm = 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(&tscm->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(&tscm->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_tscm *tscm = sbstrm->private_data;
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return amdtp_stream_pcm_pointer(&tscm->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_tscm *tscm = sbstrm->private_data;
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return amdtp_stream_pcm_pointer(&tscm->rx_stream);
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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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.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,
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.trigger = pcm_playback_trigger,
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.pointer = pcm_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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int snd_tscm_create_pcm_devices(struct snd_tscm *tscm)
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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(tscm->card, tscm->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 = tscm;
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snprintf(pcm->name, sizeof(pcm->name),
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"%s PCM", tscm->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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return 0;
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}
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