*参照元 [#t742c843]
#backlinks
*説明 [#a91463a3]
-パス: [[linux-4.4.1/sound/soc/soc-pcm.c]]
-FIXME: これは何？
--説明
**引数 [#u121d27c]
-struct snd_soc_pcm_runtime *rtd
--
--[[linux-4.4.1/snd_soc_pcm_runtime]]
-int num
--
**返り値 [#c40a7465]
-int
--
**参考 [#l12ecab6]
*実装 [#s740e0bf]
/* create a new pcm */
int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
{
struct snd_soc_platform *platform = rtd->platform;
struct snd_soc_dai *codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_pcm *pcm;
char new_name[64];
int ret = 0, playback = 0, capture = 0;
int i;
-
--[[linux-4.4.1/snd_soc_platform]]
--[[linux-4.4.1/snd_soc_dai]]
--[[linux-4.4.1/snd_pcm]]
if (rtd->dai_link->dynamic || rtd->dai_link->no_pcm) {
-
--rtd->dai_link は struct snd_soc_dai_link * 型
--[[linux-4.4.1/snd_soc_dai_link]]
playback = rtd->dai_link->dpcm_playback;
capture = rtd->dai_link->dpcm_capture;
} else {
for (i = 0; i < rtd->num_codecs; i++) {
codec_dai = rtd->codec_dais[i];
if (codec_dai->driver->playback.channels_min)
playback = 1;
if (codec_dai->driver->capture.channels_min)
capture = 1;
}
-
--rtd->codec_dais[i]->driver は struct snd_soc_dai_driver * 型
--rtd->codec_dais[i]->driver->playback は struct snd_soc_pcm_stream 型
--[[linux-4.4.1/snd_soc_dai_driver]]
--[[linux-4.4.1/snd_soc_pcm_stream]]
capture = capture && cpu_dai->driver->capture.channels_min;
playback = playback && cpu_dai->driver->playback.channels_min;
}
if (rtd->dai_link->playback_only) {
playback = 1;
capture = 0;
}
if (rtd->dai_link->capture_only) {
playback = 0;
capture = 1;
}
/* create the PCM */
if (rtd->dai_link->no_pcm) {
snprintf(new_name, sizeof(new_name), "(%s)",
rtd->dai_link->stream_name);
ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
playback, capture, &pcm);
-
--rtd->card は struct snd_soc_card * 型
--[[linux-4.4.1/snd_soc_card]]
--[[linux-4.4.1/snprintf()]]
--[[linux-4.4.1/snd_pcm_new_internal()]]
} else {
if (rtd->dai_link->dynamic)
snprintf(new_name, sizeof(new_name), "%s (*)",
rtd->dai_link->stream_name);
else
snprintf(new_name, sizeof(new_name), "%s %s-%d",
rtd->dai_link->stream_name,
(rtd->num_codecs > 1) ?
"multicodec" : rtd->codec_dai->name, num);
ret = snd_pcm_new(rtd->card->snd_card, new_name, num, playback,
capture, &pcm);
-
--rtd->card は struct snd_soc_card * 型
--[[linux-4.4.1/snd_soc_card]]
--[[linux-4.4.1/snd_pcm_new()]]
}
if (ret < 0) {
dev_err(rtd->card->dev, "ASoC: can't create pcm for %s\n",
rtd->dai_link->name);
return ret;
}
dev_dbg(rtd->card->dev, "ASoC: registered pcm #%d %s\n",num, new_name);
-
--[[linux-4.4.1/dev_err()]]
--[[linux-4.4.1/dev_dbg()]]
/* DAPM dai link stream work */
INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
-
--[[linux-4.4.1/INIT_DELAYED_WORK()]]
--[[linux-4.4.1/close_delayed_work()]]
pcm->nonatomic = rtd->dai_link->nonatomic;
rtd->pcm = pcm;
pcm->private_data = rtd;
if (rtd->dai_link->no_pcm) {
if (playback)
pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
if (capture)
pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
goto out;
}
-
--rtd->ops は struct snd_pcm_ops 型
--[[linux-4.4.1/snd_pcm_ops]]
/* ASoC PCM operations */
if (rtd->dai_link->dynamic) {
rtd->ops.open = dpcm_fe_dai_open;
rtd->ops.hw_params = dpcm_fe_dai_hw_params;
rtd->ops.prepare = dpcm_fe_dai_prepare;
rtd->ops.trigger = dpcm_fe_dai_trigger;
rtd->ops.hw_free = dpcm_fe_dai_hw_free;
rtd->ops.close = dpcm_fe_dai_close;
rtd->ops.pointer = soc_pcm_pointer;
rtd->ops.ioctl = soc_pcm_ioctl;
-
--[[linux-4.4.1/dpcm_fe_dai_open()]]
--[[linux-4.4.1/dpcm_fe_dai_hw_params()]]
--[[linux-4.4.1/dpcm_fe_dai_prepare()]]
--[[linux-4.4.1/dpcm_fe_dai_trigger()]]
--[[linux-4.4.1/dpcm_fe_dai_hw_free()]]
--[[linux-4.4.1/dpcm_fe_dai_close()]]
--[[linux-4.4.1/soc_pcm_pointer()]]
--[[linux-4.4.1/soc_pcm_ioctl()]]
} else {
rtd->ops.open = soc_pcm_open;
rtd->ops.hw_params = soc_pcm_hw_params;
rtd->ops.prepare = soc_pcm_prepare;
rtd->ops.trigger = soc_pcm_trigger;
rtd->ops.hw_free = soc_pcm_hw_free;
rtd->ops.close = soc_pcm_close;
rtd->ops.pointer = soc_pcm_pointer;
rtd->ops.ioctl = soc_pcm_ioctl;
-
--[[linux-4.4.1/soc_pcm_open()]]
--[[linux-4.4.1/soc_pcm_hw_params()]]
--[[linux-4.4.1/soc_pcm_prepare()]]
--[[linux-4.4.1/soc_pcm_trigger()]]
--[[linux-4.4.1/soc_pcm_hw_free()]]
--[[linux-4.4.1/soc_pcm_close()]]
--[[linux-4.4.1/soc_pcm_pointer()]]
--[[linux-4.4.1/soc_pcm_ioctl()]]
}
if (platform->driver->ops) {
rtd->ops.ack = platform->driver->ops->ack;
rtd->ops.copy = platform->driver->ops->copy;
rtd->ops.silence = platform->driver->ops->silence;
rtd->ops.page = platform->driver->ops->page;
rtd->ops.mmap = platform->driver->ops->mmap;
}
-
--platform->driver は const struct snd_soc_platform_driver * 型
--platform->driver->ops は const struct snd_pcm_ops * 型
--[[linux-4.4.1/snd_soc_platform_driver]]
--[[linux-4.4.1/snd_pcm_ops]]
if (playback)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &rtd->ops);
if (capture)
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &rtd->ops);
-
--[[linux-4.4.1/snd_pcm_set_ops()]]
if (platform->driver->pcm_new) {
ret = platform->driver->pcm_new(rtd);
if (ret < 0) {
dev_err(platform->dev,
"ASoC: pcm constructor failed: %d\n",
ret);
return ret;
}
}
pcm->private_free = platform->driver->pcm_free;
out:
dev_info(rtd->card->dev, "%s <-> %s mapping ok\n",
(rtd->num_codecs > 1) ? "multicodec" : rtd->codec_dai->name,
cpu_dai->name);
-
--rtd->codec_dai は struct snd_soc_dai * 型
--[[linux-4.4.1/snd_soc_dai]]
--[[linux-4.4.1/dev_info()]]
return ret;
}
*コメント [#r3067906]
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