mirror of https://gitee.com/openkylin/linux.git
643 lines
19 KiB
C
643 lines
19 KiB
C
/*
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* soc-pcm.c -- ALSA SoC PCM
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*
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* Copyright 2005 Wolfson Microelectronics PLC.
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* Copyright 2005 Openedhand Ltd.
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* Copyright (C) 2010 Slimlogic Ltd.
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* Copyright (C) 2010 Texas Instruments Inc.
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*
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* Authors: Liam Girdwood <lrg@ti.com>
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* Mark Brown <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/workqueue.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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static DEFINE_MUTEX(pcm_mutex);
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static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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int ret;
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if (!codec_dai->driver->symmetric_rates &&
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!cpu_dai->driver->symmetric_rates &&
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!rtd->dai_link->symmetric_rates)
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return 0;
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/* This can happen if multiple streams are starting simultaneously -
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* the second can need to get its constraints before the first has
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* picked a rate. Complain and allow the application to carry on.
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*/
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if (!rtd->rate) {
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dev_warn(&rtd->dev,
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"Not enforcing symmetric_rates due to race\n");
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return 0;
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}
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dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
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ret = snd_pcm_hw_constraint_minmax(substream->runtime,
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SNDRV_PCM_HW_PARAM_RATE,
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rtd->rate, rtd->rate);
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if (ret < 0) {
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dev_err(&rtd->dev,
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"Unable to apply rate symmetry constraint: %d\n", ret);
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return ret;
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}
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return 0;
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}
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/*
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* Called by ALSA when a PCM substream is opened, the runtime->hw record is
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* then initialized and any private data can be allocated. This also calls
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* startup for the cpu DAI, platform, machine and codec DAI.
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*/
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static int soc_pcm_open(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_pcm_runtime *runtime = substream->runtime;
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struct snd_soc_platform *platform = rtd->platform;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
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struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
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int ret = 0;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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/* startup the audio subsystem */
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if (cpu_dai->driver->ops->startup) {
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ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
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if (ret < 0) {
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printk(KERN_ERR "asoc: can't open interface %s\n",
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cpu_dai->name);
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goto out;
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}
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}
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if (platform->driver->ops && platform->driver->ops->open) {
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ret = platform->driver->ops->open(substream);
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if (ret < 0) {
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printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
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goto platform_err;
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}
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}
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if (codec_dai->driver->ops->startup) {
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ret = codec_dai->driver->ops->startup(substream, codec_dai);
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if (ret < 0) {
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printk(KERN_ERR "asoc: can't open codec %s\n",
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codec_dai->name);
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goto codec_dai_err;
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}
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}
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if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
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ret = rtd->dai_link->ops->startup(substream);
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if (ret < 0) {
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printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
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goto machine_err;
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}
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}
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/* Check that the codec and cpu DAIs are compatible */
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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runtime->hw.rate_min =
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max(codec_dai_drv->playback.rate_min,
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cpu_dai_drv->playback.rate_min);
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runtime->hw.rate_max =
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min(codec_dai_drv->playback.rate_max,
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cpu_dai_drv->playback.rate_max);
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runtime->hw.channels_min =
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max(codec_dai_drv->playback.channels_min,
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cpu_dai_drv->playback.channels_min);
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runtime->hw.channels_max =
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min(codec_dai_drv->playback.channels_max,
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cpu_dai_drv->playback.channels_max);
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runtime->hw.formats =
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codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
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runtime->hw.rates =
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codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
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if (codec_dai_drv->playback.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= cpu_dai_drv->playback.rates;
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if (cpu_dai_drv->playback.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= codec_dai_drv->playback.rates;
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} else {
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runtime->hw.rate_min =
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max(codec_dai_drv->capture.rate_min,
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cpu_dai_drv->capture.rate_min);
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runtime->hw.rate_max =
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min(codec_dai_drv->capture.rate_max,
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cpu_dai_drv->capture.rate_max);
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runtime->hw.channels_min =
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max(codec_dai_drv->capture.channels_min,
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cpu_dai_drv->capture.channels_min);
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runtime->hw.channels_max =
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min(codec_dai_drv->capture.channels_max,
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cpu_dai_drv->capture.channels_max);
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runtime->hw.formats =
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codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
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runtime->hw.rates =
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codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
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if (codec_dai_drv->capture.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= cpu_dai_drv->capture.rates;
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if (cpu_dai_drv->capture.rates
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& (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
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runtime->hw.rates |= codec_dai_drv->capture.rates;
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}
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ret = -EINVAL;
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snd_pcm_limit_hw_rates(runtime);
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if (!runtime->hw.rates) {
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printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
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codec_dai->name, cpu_dai->name);
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goto config_err;
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}
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if (!runtime->hw.formats) {
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printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
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codec_dai->name, cpu_dai->name);
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goto config_err;
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}
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if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
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runtime->hw.channels_min > runtime->hw.channels_max) {
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printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
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codec_dai->name, cpu_dai->name);
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goto config_err;
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}
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/* Symmetry only applies if we've already got an active stream. */
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if (cpu_dai->active || codec_dai->active) {
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ret = soc_pcm_apply_symmetry(substream);
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if (ret != 0)
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goto config_err;
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}
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pr_debug("asoc: %s <-> %s info:\n",
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codec_dai->name, cpu_dai->name);
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pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
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pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
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runtime->hw.channels_max);
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pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
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runtime->hw.rate_max);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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cpu_dai->playback_active++;
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codec_dai->playback_active++;
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} else {
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cpu_dai->capture_active++;
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codec_dai->capture_active++;
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}
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cpu_dai->active++;
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codec_dai->active++;
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rtd->codec->active++;
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mutex_unlock(&rtd->pcm_mutex);
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return 0;
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config_err:
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if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
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rtd->dai_link->ops->shutdown(substream);
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machine_err:
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if (codec_dai->driver->ops->shutdown)
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codec_dai->driver->ops->shutdown(substream, codec_dai);
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codec_dai_err:
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if (platform->driver->ops && platform->driver->ops->close)
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platform->driver->ops->close(substream);
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platform_err:
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if (cpu_dai->driver->ops->shutdown)
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cpu_dai->driver->ops->shutdown(substream, cpu_dai);
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out:
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mutex_unlock(&rtd->pcm_mutex);
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return ret;
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}
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/*
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* Power down the audio subsystem pmdown_time msecs after close is called.
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* This is to ensure there are no pops or clicks in between any music tracks
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* due to DAPM power cycling.
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*/
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static void close_delayed_work(struct work_struct *work)
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{
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struct snd_soc_pcm_runtime *rtd =
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container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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pr_debug("pop wq checking: %s status: %s waiting: %s\n",
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codec_dai->driver->playback.stream_name,
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codec_dai->playback_active ? "active" : "inactive",
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codec_dai->pop_wait ? "yes" : "no");
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/* are we waiting on this codec DAI stream */
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if (codec_dai->pop_wait == 1) {
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codec_dai->pop_wait = 0;
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snd_soc_dapm_stream_event(rtd,
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codec_dai->driver->playback.stream_name,
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SND_SOC_DAPM_STREAM_STOP);
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}
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mutex_unlock(&rtd->pcm_mutex);
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}
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/*
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* Called by ALSA when a PCM substream is closed. Private data can be
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* freed here. The cpu DAI, codec DAI, machine and platform are also
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* shutdown.
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*/
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static int soc_pcm_close(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_platform *platform = rtd->platform;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_codec *codec = rtd->codec;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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cpu_dai->playback_active--;
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codec_dai->playback_active--;
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} else {
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cpu_dai->capture_active--;
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codec_dai->capture_active--;
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}
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cpu_dai->active--;
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codec_dai->active--;
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codec->active--;
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if (!cpu_dai->active && !codec_dai->active)
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rtd->rate = 0;
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/* Muting the DAC suppresses artifacts caused during digital
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* shutdown, for example from stopping clocks.
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*/
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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snd_soc_dai_digital_mute(codec_dai, 1);
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if (cpu_dai->driver->ops->shutdown)
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cpu_dai->driver->ops->shutdown(substream, cpu_dai);
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if (codec_dai->driver->ops->shutdown)
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codec_dai->driver->ops->shutdown(substream, codec_dai);
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if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
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rtd->dai_link->ops->shutdown(substream);
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if (platform->driver->ops && platform->driver->ops->close)
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platform->driver->ops->close(substream);
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cpu_dai->runtime = NULL;
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
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/* start delayed pop wq here for playback streams */
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codec_dai->pop_wait = 1;
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schedule_delayed_work(&rtd->delayed_work,
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msecs_to_jiffies(rtd->pmdown_time));
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} else {
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/* capture streams can be powered down now */
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snd_soc_dapm_stream_event(rtd,
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codec_dai->driver->capture.stream_name,
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SND_SOC_DAPM_STREAM_STOP);
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}
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mutex_unlock(&rtd->pcm_mutex);
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return 0;
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}
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/*
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* Called by ALSA when the PCM substream is prepared, can set format, sample
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* rate, etc. This function is non atomic and can be called multiple times,
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* it can refer to the runtime info.
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*/
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static int soc_pcm_prepare(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_platform *platform = rtd->platform;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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int ret = 0;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
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ret = rtd->dai_link->ops->prepare(substream);
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if (ret < 0) {
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printk(KERN_ERR "asoc: machine prepare error\n");
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goto out;
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}
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}
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if (platform->driver->ops && platform->driver->ops->prepare) {
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ret = platform->driver->ops->prepare(substream);
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if (ret < 0) {
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printk(KERN_ERR "asoc: platform prepare error\n");
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goto out;
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}
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}
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if (codec_dai->driver->ops->prepare) {
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ret = codec_dai->driver->ops->prepare(substream, codec_dai);
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if (ret < 0) {
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printk(KERN_ERR "asoc: codec DAI prepare error\n");
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goto out;
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}
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}
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if (cpu_dai->driver->ops->prepare) {
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ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
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if (ret < 0) {
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printk(KERN_ERR "asoc: cpu DAI prepare error\n");
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goto out;
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}
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}
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/* cancel any delayed stream shutdown that is pending */
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
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codec_dai->pop_wait) {
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codec_dai->pop_wait = 0;
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cancel_delayed_work(&rtd->delayed_work);
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}
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if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
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snd_soc_dapm_stream_event(rtd,
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codec_dai->driver->playback.stream_name,
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SND_SOC_DAPM_STREAM_START);
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else
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snd_soc_dapm_stream_event(rtd,
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codec_dai->driver->capture.stream_name,
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SND_SOC_DAPM_STREAM_START);
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snd_soc_dai_digital_mute(codec_dai, 0);
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out:
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mutex_unlock(&rtd->pcm_mutex);
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return ret;
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}
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/*
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* Called by ALSA when the hardware params are set by application. This
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* function can also be called multiple times and can allocate buffers
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* (using snd_pcm_lib_* ). It's non-atomic.
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*/
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static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_platform *platform = rtd->platform;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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int ret = 0;
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mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
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if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
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ret = rtd->dai_link->ops->hw_params(substream, params);
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if (ret < 0) {
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printk(KERN_ERR "asoc: machine hw_params failed\n");
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goto out;
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}
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}
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if (codec_dai->driver->ops->hw_params) {
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ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
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if (ret < 0) {
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printk(KERN_ERR "asoc: can't set codec %s hw params\n",
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codec_dai->name);
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goto codec_err;
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}
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}
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if (cpu_dai->driver->ops->hw_params) {
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ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
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if (ret < 0) {
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printk(KERN_ERR "asoc: interface %s hw params failed\n",
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cpu_dai->name);
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goto interface_err;
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}
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}
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if (platform->driver->ops && platform->driver->ops->hw_params) {
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ret = platform->driver->ops->hw_params(substream, params);
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if (ret < 0) {
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printk(KERN_ERR "asoc: platform %s hw params failed\n",
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platform->name);
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goto platform_err;
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}
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}
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rtd->rate = params_rate(params);
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out:
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mutex_unlock(&rtd->pcm_mutex);
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return ret;
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platform_err:
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if (cpu_dai->driver->ops->hw_free)
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cpu_dai->driver->ops->hw_free(substream, cpu_dai);
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interface_err:
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if (codec_dai->driver->ops->hw_free)
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codec_dai->driver->ops->hw_free(substream, codec_dai);
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codec_err:
|
|
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
|
|
rtd->dai_link->ops->hw_free(substream);
|
|
|
|
mutex_unlock(&rtd->pcm_mutex);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Frees resources allocated by hw_params, can be called multiple times
|
|
*/
|
|
static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_soc_platform *platform = rtd->platform;
|
|
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
|
struct snd_soc_dai *codec_dai = rtd->codec_dai;
|
|
struct snd_soc_codec *codec = rtd->codec;
|
|
|
|
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
|
|
|
|
/* apply codec digital mute */
|
|
if (!codec->active)
|
|
snd_soc_dai_digital_mute(codec_dai, 1);
|
|
|
|
/* free any machine hw params */
|
|
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
|
|
rtd->dai_link->ops->hw_free(substream);
|
|
|
|
/* free any DMA resources */
|
|
if (platform->driver->ops && platform->driver->ops->hw_free)
|
|
platform->driver->ops->hw_free(substream);
|
|
|
|
/* now free hw params for the DAIs */
|
|
if (codec_dai->driver->ops->hw_free)
|
|
codec_dai->driver->ops->hw_free(substream, codec_dai);
|
|
|
|
if (cpu_dai->driver->ops->hw_free)
|
|
cpu_dai->driver->ops->hw_free(substream, cpu_dai);
|
|
|
|
mutex_unlock(&rtd->pcm_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_soc_platform *platform = rtd->platform;
|
|
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
|
struct snd_soc_dai *codec_dai = rtd->codec_dai;
|
|
int ret;
|
|
|
|
if (codec_dai->driver->ops->trigger) {
|
|
ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (platform->driver->ops && platform->driver->ops->trigger) {
|
|
ret = platform->driver->ops->trigger(substream, cmd);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
if (cpu_dai->driver->ops->trigger) {
|
|
ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* soc level wrapper for pointer callback
|
|
* If cpu_dai, codec_dai, platform driver has the delay callback, than
|
|
* the runtime->delay will be updated accordingly.
|
|
*/
|
|
static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
struct snd_soc_platform *platform = rtd->platform;
|
|
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
|
|
struct snd_soc_dai *codec_dai = rtd->codec_dai;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
snd_pcm_uframes_t offset = 0;
|
|
snd_pcm_sframes_t delay = 0;
|
|
|
|
if (platform->driver->ops && platform->driver->ops->pointer)
|
|
offset = platform->driver->ops->pointer(substream);
|
|
|
|
if (cpu_dai->driver->ops->delay)
|
|
delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
|
|
|
|
if (codec_dai->driver->ops->delay)
|
|
delay += codec_dai->driver->ops->delay(substream, codec_dai);
|
|
|
|
if (platform->driver->delay)
|
|
delay += platform->driver->delay(substream, codec_dai);
|
|
|
|
runtime->delay = delay;
|
|
|
|
return offset;
|
|
}
|
|
|
|
/* ASoC PCM operations */
|
|
static struct snd_pcm_ops soc_pcm_ops = {
|
|
.open = soc_pcm_open,
|
|
.close = soc_pcm_close,
|
|
.hw_params = soc_pcm_hw_params,
|
|
.hw_free = soc_pcm_hw_free,
|
|
.prepare = soc_pcm_prepare,
|
|
.trigger = soc_pcm_trigger,
|
|
.pointer = soc_pcm_pointer,
|
|
};
|
|
|
|
/* create a new pcm */
|
|
int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
|
|
{
|
|
struct snd_soc_codec *codec = rtd->codec;
|
|
struct snd_soc_platform *platform = rtd->platform;
|
|
struct snd_soc_dai *codec_dai = rtd->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;
|
|
|
|
/* check client and interface hw capabilities */
|
|
snprintf(new_name, sizeof(new_name), "%s %s-%d",
|
|
rtd->dai_link->stream_name, codec_dai->name, num);
|
|
|
|
if (codec_dai->driver->playback.channels_min)
|
|
playback = 1;
|
|
if (codec_dai->driver->capture.channels_min)
|
|
capture = 1;
|
|
|
|
dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
|
|
ret = snd_pcm_new(rtd->card->snd_card, new_name,
|
|
num, playback, capture, &pcm);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
|
|
return ret;
|
|
}
|
|
|
|
/* DAPM dai link stream work */
|
|
INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
|
|
|
|
rtd->pcm = pcm;
|
|
pcm->private_data = rtd;
|
|
if (platform->driver->ops) {
|
|
soc_pcm_ops.mmap = platform->driver->ops->mmap;
|
|
soc_pcm_ops.pointer = platform->driver->ops->pointer;
|
|
soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
|
|
soc_pcm_ops.copy = platform->driver->ops->copy;
|
|
soc_pcm_ops.silence = platform->driver->ops->silence;
|
|
soc_pcm_ops.ack = platform->driver->ops->ack;
|
|
soc_pcm_ops.page = platform->driver->ops->page;
|
|
}
|
|
|
|
if (playback)
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
|
|
|
|
if (capture)
|
|
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
|
|
|
|
if (platform->driver->pcm_new) {
|
|
ret = platform->driver->pcm_new(rtd);
|
|
if (ret < 0) {
|
|
pr_err("asoc: platform pcm constructor failed\n");
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
pcm->private_free = platform->driver->pcm_free;
|
|
printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
|
|
cpu_dai->name);
|
|
return ret;
|
|
}
|