soc-core.c 75.2 KB
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/*
 * soc-core.c  --  ALSA SoC Audio Layer
 *
 * Copyright 2005 Wolfson Microelectronics PLC.
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 * Copyright 2005 Openedhand Ltd.
 *
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 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
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 *         with code, comments and ideas from :-
 *         Richard Purdie <richard@openedhand.com>
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 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  TODO:
 *   o Add hw rules to enforce rates, etc.
 *   o More testing with other codecs/machines.
 *   o Add more codecs and platforms to ensure good API coverage.
 *   o Support TDM on PCM and I2S
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/bitops.h>
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#include <linux/debugfs.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <sound/ac97_codec.h>
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#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>

static DEFINE_MUTEX(pcm_mutex);
static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);

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#ifdef CONFIG_DEBUG_FS
static struct dentry *debugfs_root;
#endif

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static DEFINE_MUTEX(client_mutex);
static LIST_HEAD(card_list);
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static LIST_HEAD(dai_list);
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static LIST_HEAD(platform_list);
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static LIST_HEAD(codec_list);
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static int snd_soc_register_card(struct snd_soc_card *card);
static int snd_soc_unregister_card(struct snd_soc_card *card);

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/*
 * This is a timeout to do a DAPM powerdown after a stream is closed().
 * It can be used to eliminate pops between different playback streams, e.g.
 * between two audio tracks.
 */
static int pmdown_time = 5000;
module_param(pmdown_time, int, 0);
MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");

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/*
 * This function forces any delayed work to be queued and run.
 */
static int run_delayed_work(struct delayed_work *dwork)
{
	int ret;

	/* cancel any work waiting to be queued. */
	ret = cancel_delayed_work(dwork);

	/* if there was any work waiting then we run it now and
	 * wait for it's completion */
	if (ret) {
		schedule_delayed_work(dwork, 0);
		flush_scheduled_work();
	}
	return ret;
}

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/* codec register dump */
static ssize_t soc_codec_reg_show(struct snd_soc_codec *codec, char *buf)
{
	int i, step = 1, count = 0;

	if (!codec->reg_cache_size)
		return 0;

	if (codec->reg_cache_step)
		step = codec->reg_cache_step;

	count += sprintf(buf, "%s registers\n", codec->name);
	for (i = 0; i < codec->reg_cache_size; i += step) {
		if (codec->readable_register && !codec->readable_register(i))
			continue;

		count += sprintf(buf + count, "%2x: ", i);
		if (count >= PAGE_SIZE - 1)
			break;

		if (codec->display_register)
			count += codec->display_register(codec, buf + count,
							 PAGE_SIZE - count, i);
		else
			count += snprintf(buf + count, PAGE_SIZE - count,
					  "%4x", codec->read(codec, i));

		if (count >= PAGE_SIZE - 1)
			break;

		count += snprintf(buf + count, PAGE_SIZE - count, "\n");
		if (count >= PAGE_SIZE - 1)
			break;
	}

	/* Truncate count; min() would cause a warning */
	if (count >= PAGE_SIZE)
		count = PAGE_SIZE - 1;

	return count;
}
static ssize_t codec_reg_show(struct device *dev,
	struct device_attribute *attr, char *buf)
{
	struct snd_soc_device *devdata = dev_get_drvdata(dev);
	return soc_codec_reg_show(devdata->card->codec, buf);
}

static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);

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static ssize_t pmdown_time_show(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct snd_soc_device *socdev = dev_get_drvdata(dev);
	struct snd_soc_card *card = socdev->card;

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	return sprintf(buf, "%ld\n", card->pmdown_time);
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}

static ssize_t pmdown_time_set(struct device *dev,
			       struct device_attribute *attr,
			       const char *buf, size_t count)
{
	struct snd_soc_device *socdev = dev_get_drvdata(dev);
	struct snd_soc_card *card = socdev->card;

	strict_strtol(buf, 10, &card->pmdown_time);

	return count;
}

static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);

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#ifdef CONFIG_DEBUG_FS
static int codec_reg_open_file(struct inode *inode, struct file *file)
{
	file->private_data = inode->i_private;
	return 0;
}

static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
			       size_t count, loff_t *ppos)
{
	ssize_t ret;
	struct snd_soc_codec *codec = file->private_data;
	char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;
	ret = soc_codec_reg_show(codec, buf);
	if (ret >= 0)
		ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
	kfree(buf);
	return ret;
}

static ssize_t codec_reg_write_file(struct file *file,
		const char __user *user_buf, size_t count, loff_t *ppos)
{
	char buf[32];
	int buf_size;
	char *start = buf;
	unsigned long reg, value;
	int step = 1;
	struct snd_soc_codec *codec = file->private_data;

	buf_size = min(count, (sizeof(buf)-1));
	if (copy_from_user(buf, user_buf, buf_size))
		return -EFAULT;
	buf[buf_size] = 0;

	if (codec->reg_cache_step)
		step = codec->reg_cache_step;

	while (*start == ' ')
		start++;
	reg = simple_strtoul(start, &start, 16);
	if ((reg >= codec->reg_cache_size) || (reg % step))
		return -EINVAL;
	while (*start == ' ')
		start++;
	if (strict_strtoul(start, 16, &value))
		return -EINVAL;
	codec->write(codec, reg, value);
	return buf_size;
}

static const struct file_operations codec_reg_fops = {
	.open = codec_reg_open_file,
	.read = codec_reg_read_file,
	.write = codec_reg_write_file,
};

static void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
	char codec_root[128];

	if (codec->dev)
		snprintf(codec_root, sizeof(codec_root),
			"%s.%s", codec->name, dev_name(codec->dev));
	else
		snprintf(codec_root, sizeof(codec_root),
			"%s", codec->name);

	codec->debugfs_codec_root = debugfs_create_dir(codec_root,
						       debugfs_root);
	if (!codec->debugfs_codec_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create codec debugfs directory\n");
		return;
	}

	codec->debugfs_reg = debugfs_create_file("codec_reg", 0644,
						 codec->debugfs_codec_root,
						 codec, &codec_reg_fops);
	if (!codec->debugfs_reg)
		printk(KERN_WARNING
		       "ASoC: Failed to create codec register debugfs file\n");

	codec->debugfs_pop_time = debugfs_create_u32("dapm_pop_time", 0744,
						     codec->debugfs_codec_root,
						     &codec->pop_time);
	if (!codec->debugfs_pop_time)
		printk(KERN_WARNING
		       "Failed to create pop time debugfs file\n");

	codec->debugfs_dapm = debugfs_create_dir("dapm",
						 codec->debugfs_codec_root);
	if (!codec->debugfs_dapm)
		printk(KERN_WARNING
		       "Failed to create DAPM debugfs directory\n");

	snd_soc_dapm_debugfs_init(codec);
}

static void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
	debugfs_remove_recursive(codec->debugfs_codec_root);
}

#else

static inline void soc_init_codec_debugfs(struct snd_soc_codec *codec)
{
}

static inline void soc_cleanup_codec_debugfs(struct snd_soc_codec *codec)
{
}
#endif

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#ifdef CONFIG_SND_SOC_AC97_BUS
/* unregister ac97 codec */
static int soc_ac97_dev_unregister(struct snd_soc_codec *codec)
{
	if (codec->ac97->dev.bus)
		device_unregister(&codec->ac97->dev);
	return 0;
}

/* stop no dev release warning */
static void soc_ac97_device_release(struct device *dev){}

/* register ac97 codec to bus */
static int soc_ac97_dev_register(struct snd_soc_codec *codec)
{
	int err;

	codec->ac97->dev.bus = &ac97_bus_type;
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	codec->ac97->dev.parent = codec->card->dev;
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	codec->ac97->dev.release = soc_ac97_device_release;

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	dev_set_name(&codec->ac97->dev, "%d-%d:%s",
		     codec->card->number, 0, codec->name);
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	err = device_register(&codec->ac97->dev);
	if (err < 0) {
		snd_printk(KERN_ERR "Can't register ac97 bus\n");
		codec->ac97->dev.bus = NULL;
		return err;
	}
	return 0;
}
#endif

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static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_dai_link *machine = rtd->dai;
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
	int ret;

	if (codec_dai->symmetric_rates || cpu_dai->symmetric_rates ||
	    machine->symmetric_rates) {
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		dev_dbg(card->dev, "Symmetry forces %dHz rate\n",
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			machine->rate);

		ret = snd_pcm_hw_constraint_minmax(substream->runtime,
						   SNDRV_PCM_HW_PARAM_RATE,
						   machine->rate,
						   machine->rate);
		if (ret < 0) {
			dev_err(card->dev,
				"Unable to apply rate symmetry constraint: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

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/*
 * Called by ALSA when a PCM substream is opened, the runtime->hw record is
 * then initialized and any private data can be allocated. This also calls
 * startup for the cpu DAI, platform, machine and codec DAI.
 */
static int soc_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
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	struct snd_soc_card *card = socdev->card;
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	struct snd_pcm_runtime *runtime = substream->runtime;
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	struct snd_soc_dai_link *machine = rtd->dai;
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	struct snd_soc_platform *platform = card->platform;
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	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
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	int ret = 0;

	mutex_lock(&pcm_mutex);

	/* startup the audio subsystem */
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	if (cpu_dai->ops->startup) {
		ret = cpu_dai->ops->startup(substream, cpu_dai);
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		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open interface %s\n",
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				cpu_dai->name);
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			goto out;
		}
	}

	if (platform->pcm_ops->open) {
		ret = platform->pcm_ops->open(substream);
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
			goto platform_err;
		}
	}

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	if (codec_dai->ops->startup) {
		ret = codec_dai->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",
				codec_dai->name);
			goto codec_dai_err;
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		}
	}

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	if (machine->ops && machine->ops->startup) {
		ret = machine->ops->startup(substream);
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		if (ret < 0) {
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			printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
			goto machine_err;
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		}
	}

	/* Check that the codec and cpu DAI's are compatible */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		runtime->hw.rate_min =
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			max(codec_dai->playback.rate_min,
			    cpu_dai->playback.rate_min);
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		runtime->hw.rate_max =
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			min(codec_dai->playback.rate_max,
			    cpu_dai->playback.rate_max);
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		runtime->hw.channels_min =
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			max(codec_dai->playback.channels_min,
				cpu_dai->playback.channels_min);
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		runtime->hw.channels_max =
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			min(codec_dai->playback.channels_max,
				cpu_dai->playback.channels_max);
		runtime->hw.formats =
			codec_dai->playback.formats & cpu_dai->playback.formats;
		runtime->hw.rates =
			codec_dai->playback.rates & cpu_dai->playback.rates;
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		if (codec_dai->playback.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= cpu_dai->playback.rates;
		if (cpu_dai->playback.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= codec_dai->playback.rates;
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	} else {
		runtime->hw.rate_min =
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			max(codec_dai->capture.rate_min,
			    cpu_dai->capture.rate_min);
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		runtime->hw.rate_max =
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			min(codec_dai->capture.rate_max,
			    cpu_dai->capture.rate_max);
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		runtime->hw.channels_min =
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			max(codec_dai->capture.channels_min,
				cpu_dai->capture.channels_min);
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		runtime->hw.channels_max =
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			min(codec_dai->capture.channels_max,
				cpu_dai->capture.channels_max);
		runtime->hw.formats =
			codec_dai->capture.formats & cpu_dai->capture.formats;
		runtime->hw.rates =
			codec_dai->capture.rates & cpu_dai->capture.rates;
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		if (codec_dai->capture.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= cpu_dai->capture.rates;
		if (cpu_dai->capture.rates
			   & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
			runtime->hw.rates |= codec_dai->capture.rates;
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	}

	snd_pcm_limit_hw_rates(runtime);
	if (!runtime->hw.rates) {
		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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	}
	if (!runtime->hw.formats) {
		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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	}
	if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
		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. */
	if (cpu_dai->active || codec_dai->active) {
		ret = soc_pcm_apply_symmetry(substream);
		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", codec_dai->name, cpu_dai->name);
	pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
	pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
		 runtime->hw.channels_max);
	pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
		 runtime->hw.rate_max);
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	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		cpu_dai->playback.active++;
		codec_dai->playback.active++;
	} else {
		cpu_dai->capture.active++;
		codec_dai->capture.active++;
	}
	cpu_dai->active++;
	codec_dai->active++;
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	card->codec->active++;
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	mutex_unlock(&pcm_mutex);
	return 0;

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config_err:
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	if (machine->ops && machine->ops->shutdown)
		machine->ops->shutdown(substream);

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machine_err:
	if (codec_dai->ops->shutdown)
		codec_dai->ops->shutdown(substream, codec_dai);

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codec_dai_err:
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	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);

platform_err:
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	if (cpu_dai->ops->shutdown)
		cpu_dai->ops->shutdown(substream, cpu_dai);
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out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
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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
 * due to DAPM power cycling.
 */
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static void close_delayed_work(struct work_struct *work)
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{
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	struct snd_soc_card *card = container_of(work, struct snd_soc_card,
						 delayed_work.work);
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	struct snd_soc_codec *codec = card->codec;
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	struct snd_soc_dai *codec_dai;
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	int i;

	mutex_lock(&pcm_mutex);
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	for (i = 0; i < codec->num_dai; i++) {
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		codec_dai = &codec->dai[i];

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		pr_debug("pop wq checking: %s status: %s waiting: %s\n",
			 codec_dai->playback.stream_name,
			 codec_dai->playback.active ? "active" : "inactive",
			 codec_dai->pop_wait ? "yes" : "no");
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		/* are we waiting on this codec DAI stream */
		if (codec_dai->pop_wait == 1) {
			codec_dai->pop_wait = 0;
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			snd_soc_dapm_stream_event(codec,
				codec_dai->playback.stream_name,
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				SND_SOC_DAPM_STREAM_STOP);
		}
	}
	mutex_unlock(&pcm_mutex);
}

/*
 * Called by ALSA when a PCM substream is closed. Private data can be
 * freed here. The cpu DAI, codec DAI, machine and platform are also
 * shutdown.
 */
static int soc_codec_close(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
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	struct snd_soc_card *card = socdev->card;
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	struct snd_soc_dai_link *machine = rtd->dai;
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	struct snd_soc_platform *platform = card->platform;
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	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
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	struct snd_soc_codec *codec = card->codec;
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	mutex_lock(&pcm_mutex);

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	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		cpu_dai->playback.active--;
		codec_dai->playback.active--;
	} else {
		cpu_dai->capture.active--;
		codec_dai->capture.active--;
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	}
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	cpu_dai->active--;
	codec_dai->active--;
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	codec->active--;

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	/* Muting the DAC suppresses artifacts caused during digital
	 * shutdown, for example from stopping clocks.
	 */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		snd_soc_dai_digital_mute(codec_dai, 1);

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	if (cpu_dai->ops->shutdown)
		cpu_dai->ops->shutdown(substream, cpu_dai);
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	if (codec_dai->ops->shutdown)
		codec_dai->ops->shutdown(substream, codec_dai);
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	if (machine->ops && machine->ops->shutdown)
		machine->ops->shutdown(substream);

	if (platform->pcm_ops->close)
		platform->pcm_ops->close(substream);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		/* start delayed pop wq here for playback streams */
586
		codec_dai->pop_wait = 1;
587
		schedule_delayed_work(&card->delayed_work,
588
			msecs_to_jiffies(card->pmdown_time));
F
Frank Mandarino 已提交
589 590
	} else {
		/* capture streams can be powered down now */
591
		snd_soc_dapm_stream_event(codec,
592 593
			codec_dai->capture.stream_name,
			SND_SOC_DAPM_STREAM_STOP);
F
Frank Mandarino 已提交
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608
	}

	mutex_unlock(&pcm_mutex);
	return 0;
}

/*
 * Called by ALSA when the PCM substream is prepared, can set format, sample
 * rate, etc.  This function is non atomic and can be called multiple times,
 * it can refer to the runtime info.
 */
static int soc_pcm_prepare(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
609
	struct snd_soc_card *card = socdev->card;
610
	struct snd_soc_dai_link *machine = rtd->dai;
611
	struct snd_soc_platform *platform = card->platform;
612 613
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
614
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
615 616 617
	int ret = 0;

	mutex_lock(&pcm_mutex);
618 619 620 621 622 623 624 625 626

	if (machine->ops && machine->ops->prepare) {
		ret = machine->ops->prepare(substream);
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine prepare error\n");
			goto out;
		}
	}

F
Frank Mandarino 已提交
627 628
	if (platform->pcm_ops->prepare) {
		ret = platform->pcm_ops->prepare(substream);
629 630
		if (ret < 0) {
			printk(KERN_ERR "asoc: platform prepare error\n");
F
Frank Mandarino 已提交
631
			goto out;
632
		}
F
Frank Mandarino 已提交
633 634
	}

635 636
	if (codec_dai->ops->prepare) {
		ret = codec_dai->ops->prepare(substream, codec_dai);
637 638
		if (ret < 0) {
			printk(KERN_ERR "asoc: codec DAI prepare error\n");
F
Frank Mandarino 已提交
639
			goto out;
640
		}
F
Frank Mandarino 已提交
641 642
	}

643 644
	if (cpu_dai->ops->prepare) {
		ret = cpu_dai->ops->prepare(substream, cpu_dai);
645 646 647 648 649
		if (ret < 0) {
			printk(KERN_ERR "asoc: cpu DAI prepare error\n");
			goto out;
		}
	}
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650

651 652 653 654
	/* cancel any delayed stream shutdown that is pending */
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
	    codec_dai->pop_wait) {
		codec_dai->pop_wait = 0;
655
		cancel_delayed_work(&card->delayed_work);
656
	}
F
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657

658 659 660 661 662 663 664 665
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		snd_soc_dapm_stream_event(codec,
					  codec_dai->playback.stream_name,
					  SND_SOC_DAPM_STREAM_START);
	else
		snd_soc_dapm_stream_event(codec,
					  codec_dai->capture.stream_name,
					  SND_SOC_DAPM_STREAM_START);
666

667
	snd_soc_dai_digital_mute(codec_dai, 0);
F
Frank Mandarino 已提交
668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683

out:
	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Called by ALSA when the hardware params are set by application. This
 * function can also be called multiple times and can allocate buffers
 * (using snd_pcm_lib_* ). It's non-atomic.
 */
static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_device *socdev = rtd->socdev;
684
	struct snd_soc_dai_link *machine = rtd->dai;
685 686
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
687 688
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
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689 690 691 692
	int ret = 0;

	mutex_lock(&pcm_mutex);

693 694 695 696
	if (machine->ops && machine->ops->hw_params) {
		ret = machine->ops->hw_params(substream, params);
		if (ret < 0) {
			printk(KERN_ERR "asoc: machine hw_params failed\n");
F
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697
			goto out;
698
		}
F
Frank Mandarino 已提交
699 700
	}

701 702
	if (codec_dai->ops->hw_params) {
		ret = codec_dai->ops->hw_params(substream, params, codec_dai);
F
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703 704
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't set codec %s hw params\n",
705 706
				codec_dai->name);
			goto codec_err;
F
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707 708 709
		}
	}

710 711
	if (cpu_dai->ops->hw_params) {
		ret = cpu_dai->ops->hw_params(substream, params, cpu_dai);
F
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712
		if (ret < 0) {
713
			printk(KERN_ERR "asoc: interface %s hw params failed\n",
714
				cpu_dai->name);
F
Frank Mandarino 已提交
715 716 717 718 719 720 721
			goto interface_err;
		}
	}

	if (platform->pcm_ops->hw_params) {
		ret = platform->pcm_ops->hw_params(substream, params);
		if (ret < 0) {
722
			printk(KERN_ERR "asoc: platform %s hw params failed\n",
F
Frank Mandarino 已提交
723 724 725 726 727
				platform->name);
			goto platform_err;
		}
	}

728 729
	machine->rate = params_rate(params);

F
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730 731 732 733 734
out:
	mutex_unlock(&pcm_mutex);
	return ret;

platform_err:
735 736
	if (cpu_dai->ops->hw_free)
		cpu_dai->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
737 738

interface_err:
739 740
	if (codec_dai->ops->hw_free)
		codec_dai->ops->hw_free(substream, codec_dai);
741 742

codec_err:
743
	if (machine->ops && machine->ops->hw_free)
744
		machine->ops->hw_free(substream);
F
Frank Mandarino 已提交
745 746 747 748 749 750 751 752 753 754 755 756

	mutex_unlock(&pcm_mutex);
	return ret;
}

/*
 * Free's 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_device *socdev = rtd->socdev;
757
	struct snd_soc_dai_link *machine = rtd->dai;
758 759
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
760 761
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
762
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
763 764 765 766

	mutex_lock(&pcm_mutex);

	/* apply codec digital mute */
767 768
	if (!codec->active)
		snd_soc_dai_digital_mute(codec_dai, 1);
F
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769 770 771 772 773 774 775 776 777 778

	/* free any machine hw params */
	if (machine->ops && machine->ops->hw_free)
		machine->ops->hw_free(substream);

	/* free any DMA resources */
	if (platform->pcm_ops->hw_free)
		platform->pcm_ops->hw_free(substream);

	/* now free hw params for the DAI's  */
779 780
	if (codec_dai->ops->hw_free)
		codec_dai->ops->hw_free(substream, codec_dai);
F
Frank Mandarino 已提交
781

782 783
	if (cpu_dai->ops->hw_free)
		cpu_dai->ops->hw_free(substream, cpu_dai);
F
Frank Mandarino 已提交
784 785 786 787 788 789 790 791 792

	mutex_unlock(&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_device *socdev = rtd->socdev;
793
	struct snd_soc_card *card= socdev->card;
794
	struct snd_soc_dai_link *machine = rtd->dai;
795
	struct snd_soc_platform *platform = card->platform;
796 797
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
F
Frank Mandarino 已提交
798 799
	int ret;

800 801
	if (codec_dai->ops->trigger) {
		ret = codec_dai->ops->trigger(substream, cmd, codec_dai);
F
Frank Mandarino 已提交
802 803 804 805 806 807 808 809 810 811
		if (ret < 0)
			return ret;
	}

	if (platform->pcm_ops->trigger) {
		ret = platform->pcm_ops->trigger(substream, cmd);
		if (ret < 0)
			return ret;
	}

812 813
	if (cpu_dai->ops->trigger) {
		ret = cpu_dai->ops->trigger(substream, cmd, cpu_dai);
F
Frank Mandarino 已提交
814 815 816 817 818 819
		if (ret < 0)
			return ret;
	}
	return 0;
}

820 821
/*
 * soc level wrapper for pointer callback
822 823
 * If cpu_dai, codec_dai, platform driver has the delay callback, than
 * the runtime->delay will be updated accordingly.
824 825 826 827 828 829 830
 */
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_device *socdev = rtd->socdev;
	struct snd_soc_card *card = socdev->card;
	struct snd_soc_platform *platform = card->platform;
831 832 833 834
	struct snd_soc_dai_link *machine = rtd->dai;
	struct snd_soc_dai *cpu_dai = machine->cpu_dai;
	struct snd_soc_dai *codec_dai = machine->codec_dai;
	struct snd_pcm_runtime *runtime = substream->runtime;
835
	snd_pcm_uframes_t offset = 0;
836
	snd_pcm_sframes_t delay = 0;
837 838 839 840

	if (platform->pcm_ops->pointer)
		offset = platform->pcm_ops->pointer(substream);

841 842 843 844 845 846 847 848 849 850 851
	if (cpu_dai->ops->delay)
		delay += cpu_dai->ops->delay(substream, cpu_dai);

	if (codec_dai->ops->delay)
		delay += codec_dai->ops->delay(substream, codec_dai);

	if (platform->delay)
		delay += platform->delay(substream, codec_dai);

	runtime->delay = delay;

852 853 854
	return offset;
}

F
Frank Mandarino 已提交
855 856 857 858 859 860 861 862
/* ASoC PCM operations */
static struct snd_pcm_ops soc_pcm_ops = {
	.open		= soc_pcm_open,
	.close		= soc_codec_close,
	.hw_params	= soc_pcm_hw_params,
	.hw_free	= soc_pcm_hw_free,
	.prepare	= soc_pcm_prepare,
	.trigger	= soc_pcm_trigger,
863
	.pointer	= soc_pcm_pointer,
F
Frank Mandarino 已提交
864 865 866 867
};

#ifdef CONFIG_PM
/* powers down audio subsystem for suspend */
M
Mark Brown 已提交
868
static int soc_suspend(struct device *dev)
F
Frank Mandarino 已提交
869
{
M
Mark Brown 已提交
870
	struct platform_device *pdev = to_platform_device(dev);
871
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
872
	struct snd_soc_card *card = socdev->card;
873
	struct snd_soc_platform *platform = card->platform;
874
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
875
	struct snd_soc_codec *codec = card->codec;
F
Frank Mandarino 已提交
876 877
	int i;

878 879 880 881 882 883
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
	if (!codec)
		return 0;

884 885 886 887 888 889 890 891 892 893
	/* Due to the resume being scheduled into a workqueue we could
	* suspend before that's finished - wait for it to complete.
	 */
	snd_power_lock(codec->card);
	snd_power_wait(codec->card, SNDRV_CTL_POWER_D0);
	snd_power_unlock(codec->card);

	/* we're going to block userspace touching us until resume completes */
	snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);

F
Frank Mandarino 已提交
894
	/* mute any active DAC's */
895 896
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
897 898 899 900

		if (card->dai_link[i].ignore_suspend)
			continue;

901 902
		if (dai->ops->digital_mute && dai->playback.active)
			dai->ops->digital_mute(dai, 1);
F
Frank Mandarino 已提交
903 904
	}

905
	/* suspend all pcms */
906 907 908 909
	for (i = 0; i < card->num_links; i++) {
		if (card->dai_link[i].ignore_suspend)
			continue;

910
		snd_pcm_suspend_all(card->dai_link[i].pcm);
911
	}
912

913
	if (card->suspend_pre)
M
Mark Brown 已提交
914
		card->suspend_pre(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
915

916 917
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai  *cpu_dai = card->dai_link[i].cpu_dai;
918 919 920 921

		if (card->dai_link[i].ignore_suspend)
			continue;

M
Mark Brown 已提交
922
		if (cpu_dai->suspend && !cpu_dai->ac97_control)
923
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
924
		if (platform->suspend)
925
			platform->suspend(&card->dai_link[i]);
F
Frank Mandarino 已提交
926 927 928
	}

	/* close any waiting streams and save state */
929
	run_delayed_work(&card->delayed_work);
930
	codec->suspend_bias_level = codec->bias_level;
F
Frank Mandarino 已提交
931

932
	for (i = 0; i < codec->num_dai; i++) {
F
Frank Mandarino 已提交
933
		char *stream = codec->dai[i].playback.stream_name;
934 935 936 937

		if (card->dai_link[i].ignore_suspend)
			continue;

F
Frank Mandarino 已提交
938 939 940 941 942 943 944 945 946
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_SUSPEND);
		stream = codec->dai[i].capture.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_SUSPEND);
	}

947 948 949 950 951 952 953 954 955 956 957 958 959
	/* If there are paths active then the CODEC will be held with
	 * bias _ON and should not be suspended. */
	if (codec_dev->suspend) {
		switch (codec->bias_level) {
		case SND_SOC_BIAS_STANDBY:
		case SND_SOC_BIAS_OFF:
			codec_dev->suspend(pdev, PMSG_SUSPEND);
			break;
		default:
			dev_dbg(socdev->dev, "CODEC is on over suspend\n");
			break;
		}
	}
F
Frank Mandarino 已提交
960

961 962
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
963 964 965 966

		if (card->dai_link[i].ignore_suspend)
			continue;

M
Mark Brown 已提交
967
		if (cpu_dai->suspend && cpu_dai->ac97_control)
968
			cpu_dai->suspend(cpu_dai);
F
Frank Mandarino 已提交
969 970
	}

971
	if (card->suspend_post)
M
Mark Brown 已提交
972
		card->suspend_post(pdev, PMSG_SUSPEND);
F
Frank Mandarino 已提交
973 974 975 976

	return 0;
}

977 978 979 980
/* deferred resume work, so resume can complete before we finished
 * setting our codec back up, which can be very slow on I2C
 */
static void soc_resume_deferred(struct work_struct *work)
F
Frank Mandarino 已提交
981
{
982 983 984 985
	struct snd_soc_card *card = container_of(work,
						 struct snd_soc_card,
						 deferred_resume_work);
	struct snd_soc_device *socdev = card->socdev;
986
	struct snd_soc_platform *platform = card->platform;
987
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
988
	struct snd_soc_codec *codec = card->codec;
989
	struct platform_device *pdev = to_platform_device(socdev->dev);
F
Frank Mandarino 已提交
990 991
	int i;

992 993 994 995
	/* our power state is still SNDRV_CTL_POWER_D3hot from suspend time,
	 * so userspace apps are blocked from touching us
	 */

996
	dev_dbg(socdev->dev, "starting resume work\n");
997

998 999 1000
	/* Bring us up into D2 so that DAPM starts enabling things */
	snd_power_change_state(codec->card, SNDRV_CTL_POWER_D2);

1001 1002
	if (card->resume_pre)
		card->resume_pre(pdev);
F
Frank Mandarino 已提交
1003

1004 1005
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1006 1007 1008 1009

		if (card->dai_link[i].ignore_suspend)
			continue;

M
Mark Brown 已提交
1010
		if (cpu_dai->resume && cpu_dai->ac97_control)
1011
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
1012 1013
	}

1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028
	/* If the CODEC was idle over suspend then it will have been
	 * left with bias OFF or STANDBY and suspended so we must now
	 * resume.  Otherwise the suspend was suppressed.
	 */
	if (codec_dev->resume) {
		switch (codec->bias_level) {
		case SND_SOC_BIAS_STANDBY:
		case SND_SOC_BIAS_OFF:
			codec_dev->resume(pdev);
			break;
		default:
			dev_dbg(socdev->dev, "CODEC was on over suspend\n");
			break;
		}
	}
F
Frank Mandarino 已提交
1029

1030 1031
	for (i = 0; i < codec->num_dai; i++) {
		char *stream = codec->dai[i].playback.stream_name;
1032 1033 1034 1035

		if (card->dai_link[i].ignore_suspend)
			continue;

F
Frank Mandarino 已提交
1036 1037 1038 1039 1040 1041 1042 1043 1044
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_RESUME);
		stream = codec->dai[i].capture.stream_name;
		if (stream != NULL)
			snd_soc_dapm_stream_event(codec, stream,
				SND_SOC_DAPM_STREAM_RESUME);
	}

1045
	/* unmute any active DACs */
1046 1047
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *dai = card->dai_link[i].codec_dai;
1048 1049 1050 1051

		if (card->dai_link[i].ignore_suspend)
			continue;

1052 1053
		if (dai->ops->digital_mute && dai->playback.active)
			dai->ops->digital_mute(dai, 0);
F
Frank Mandarino 已提交
1054 1055
	}

1056 1057
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
1058 1059 1060 1061

		if (card->dai_link[i].ignore_suspend)
			continue;

M
Mark Brown 已提交
1062
		if (cpu_dai->resume && !cpu_dai->ac97_control)
1063
			cpu_dai->resume(cpu_dai);
F
Frank Mandarino 已提交
1064
		if (platform->resume)
1065
			platform->resume(&card->dai_link[i]);
F
Frank Mandarino 已提交
1066 1067
	}

1068 1069
	if (card->resume_post)
		card->resume_post(pdev);
F
Frank Mandarino 已提交
1070

1071
	dev_dbg(socdev->dev, "resume work completed\n");
1072 1073 1074 1075 1076 1077

	/* userspace can access us now we are back as we were before */
	snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
}

/* powers up audio subsystem after a suspend */
M
Mark Brown 已提交
1078
static int soc_resume(struct device *dev)
1079
{
M
Mark Brown 已提交
1080
	struct platform_device *pdev = to_platform_device(dev);
1081
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1082
	struct snd_soc_card *card = socdev->card;
1083
	struct snd_soc_dai *cpu_dai = card->dai_link[0].cpu_dai;
1084

1085 1086 1087 1088 1089 1090
	/* If the initialization of this soc device failed, there is no codec
	 * associated with it. Just bail out in this case.
	 */
	if (!card->codec)
		return 0;

1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103
	/* AC97 devices might have other drivers hanging off them so
	 * need to resume immediately.  Other drivers don't have that
	 * problem and may take a substantial amount of time to resume
	 * due to I/O costs and anti-pop so handle them out of line.
	 */
	if (cpu_dai->ac97_control) {
		dev_dbg(socdev->dev, "Resuming AC97 immediately\n");
		soc_resume_deferred(&card->deferred_resume_work);
	} else {
		dev_dbg(socdev->dev, "Scheduling resume work\n");
		if (!schedule_work(&card->deferred_resume_work))
			dev_err(socdev->dev, "resume work item may be lost\n");
	}
1104

F
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1105 1106 1107 1108 1109 1110 1111
	return 0;
}
#else
#define soc_suspend	NULL
#define soc_resume	NULL
#endif

1112 1113 1114
static struct snd_soc_dai_ops null_dai_ops = {
};

1115
static void snd_soc_instantiate_card(struct snd_soc_card *card)
F
Frank Mandarino 已提交
1116
{
1117 1118 1119 1120
	struct platform_device *pdev = container_of(card->dev,
						    struct platform_device,
						    dev);
	struct snd_soc_codec_device *codec_dev = card->socdev->codec_dev;
M
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1121
	struct snd_soc_codec *codec;
1122 1123
	struct snd_soc_platform *platform;
	struct snd_soc_dai *dai;
1124
	int i, found, ret, ac97;
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139

	if (card->instantiated)
		return;

	found = 0;
	list_for_each_entry(platform, &platform_list, list)
		if (card->platform == platform) {
			found = 1;
			break;
		}
	if (!found) {
		dev_dbg(card->dev, "Platform %s not registered\n",
			card->platform->name);
		return;
	}
1140

1141
	ac97 = 0;
1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
	for (i = 0; i < card->num_links; i++) {
		found = 0;
		list_for_each_entry(dai, &dai_list, list)
			if (card->dai_link[i].cpu_dai == dai) {
				found = 1;
				break;
			}
		if (!found) {
			dev_dbg(card->dev, "DAI %s not registered\n",
				card->dai_link[i].cpu_dai->name);
			return;
		}
1154 1155 1156

		if (card->dai_link[i].cpu_dai->ac97_control)
			ac97 = 1;
M
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1157 1158
	}

1159 1160 1161 1162 1163
	for (i = 0; i < card->num_links; i++) {
		if (!card->dai_link[i].codec_dai->ops)
			card->dai_link[i].codec_dai->ops = &null_dai_ops;
	}

1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184
	/* If we have AC97 in the system then don't wait for the
	 * codec.  This will need revisiting if we have to handle
	 * systems with mixed AC97 and non-AC97 parts.  Only check for
	 * DAIs currently; we can't do this per link since some AC97
	 * codecs have non-AC97 DAIs.
	 */
	if (!ac97)
		for (i = 0; i < card->num_links; i++) {
			found = 0;
			list_for_each_entry(dai, &dai_list, list)
				if (card->dai_link[i].codec_dai == dai) {
					found = 1;
					break;
				}
			if (!found) {
				dev_dbg(card->dev, "DAI %s not registered\n",
					card->dai_link[i].codec_dai->name);
				return;
			}
		}

1185 1186 1187 1188 1189
	/* Note that we do not current check for codec components */

	dev_dbg(card->dev, "All components present, instantiating\n");

	/* Found everything, bring it up */
1190 1191
	card->pmdown_time = pmdown_time;

1192 1193
	if (card->probe) {
		ret = card->probe(pdev);
1194
		if (ret < 0)
1195
			return;
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1196 1197
	}

1198 1199
	for (i = 0; i < card->num_links; i++) {
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
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1200
		if (cpu_dai->probe) {
1201
			ret = cpu_dai->probe(pdev, cpu_dai);
1202
			if (ret < 0)
F
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1203 1204 1205 1206 1207 1208
				goto cpu_dai_err;
		}
	}

	if (codec_dev->probe) {
		ret = codec_dev->probe(pdev);
1209
		if (ret < 0)
F
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1210 1211
			goto cpu_dai_err;
	}
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1212
	codec = card->codec;
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1213 1214 1215

	if (platform->probe) {
		ret = platform->probe(pdev);
1216
		if (ret < 0)
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1217 1218 1219 1220
			goto platform_err;
	}

	/* DAPM stream work */
1221
	INIT_DELAYED_WORK(&card->delayed_work, close_delayed_work);
R
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1222
#ifdef CONFIG_PM
1223
	/* deferred resume work */
1224
	INIT_WORK(&card->deferred_resume_work, soc_resume_deferred);
R
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1225
#endif
1226

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1227 1228 1229 1230 1231 1232 1233 1234 1235
	for (i = 0; i < card->num_links; i++) {
		if (card->dai_link[i].init) {
			ret = card->dai_link[i].init(codec);
			if (ret < 0) {
				printk(KERN_ERR "asoc: failed to init %s\n",
					card->dai_link[i].stream_name);
				continue;
			}
		}
1236
		if (card->dai_link[i].codec_dai->ac97_control)
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1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
			ac97 = 1;
	}

	snprintf(codec->card->shortname, sizeof(codec->card->shortname),
		 "%s",  card->name);
	snprintf(codec->card->longname, sizeof(codec->card->longname),
		 "%s (%s)", card->name, codec->name);

	/* Make sure all DAPM widgets are instantiated */
	snd_soc_dapm_new_widgets(codec);

	ret = snd_card_register(codec->card);
	if (ret < 0) {
		printk(KERN_ERR "asoc: failed to register soundcard for %s\n",
				codec->name);
		goto card_err;
	}

	mutex_lock(&codec->mutex);
#ifdef CONFIG_SND_SOC_AC97_BUS
	/* Only instantiate AC97 if not already done by the adaptor
	 * for the generic AC97 subsystem.
	 */
	if (ac97 && strcmp(codec->name, "AC97") != 0) {
		ret = soc_ac97_dev_register(codec);
		if (ret < 0) {
			printk(KERN_ERR "asoc: AC97 device register failed\n");
			snd_card_free(codec->card);
			mutex_unlock(&codec->mutex);
			goto card_err;
		}
	}
#endif

	ret = snd_soc_dapm_sys_add(card->socdev->dev);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");

1275 1276 1277 1278
	ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");

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1279 1280 1281 1282 1283 1284 1285
	ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
	if (ret < 0)
		printk(KERN_WARNING "asoc: failed to add codec sysfs files\n");

	soc_init_codec_debugfs(codec);
	mutex_unlock(&codec->mutex);

1286 1287 1288
	card->instantiated = 1;

	return;
F
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1289

M
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1290 1291 1292 1293
card_err:
	if (platform->remove)
		platform->remove(pdev);

F
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1294 1295 1296 1297 1298
platform_err:
	if (codec_dev->remove)
		codec_dev->remove(pdev);

cpu_dai_err:
1299
	for (i--; i >= 0; i--) {
1300
		struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
F
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1301
		if (cpu_dai->remove)
1302
			cpu_dai->remove(pdev, cpu_dai);
F
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1303 1304
	}

1305 1306
	if (card->remove)
		card->remove(pdev);
1307
}
F
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1308

1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338
/*
 * Attempt to initialise any uninitalised cards.  Must be called with
 * client_mutex.
 */
static void snd_soc_instantiate_cards(void)
{
	struct snd_soc_card *card;
	list_for_each_entry(card, &card_list, list)
		snd_soc_instantiate_card(card);
}

/* probes a new socdev */
static int soc_probe(struct platform_device *pdev)
{
	int ret = 0;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_card *card = socdev->card;

	/* Bodge while we push things out of socdev */
	card->socdev = socdev;

	/* Bodge while we unpick instantiation */
	card->dev = &pdev->dev;
	ret = snd_soc_register_card(card);
	if (ret != 0) {
		dev_err(&pdev->dev, "Failed to register card\n");
		return ret;
	}

	return 0;
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1339 1340 1341 1342 1343 1344 1345
}

/* removes a socdev */
static int soc_remove(struct platform_device *pdev)
{
	int i;
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
1346
	struct snd_soc_card *card = socdev->card;
1347
	struct snd_soc_platform *platform = card->platform;
F
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1348 1349
	struct snd_soc_codec_device *codec_dev = socdev->codec_dev;

1350 1351
	if (card->instantiated) {
		run_delayed_work(&card->delayed_work);
1352

1353 1354
		if (platform->remove)
			platform->remove(pdev);
1355

1356 1357
		if (codec_dev->remove)
			codec_dev->remove(pdev);
F
Frank Mandarino 已提交
1358

1359 1360 1361 1362 1363
		for (i = 0; i < card->num_links; i++) {
			struct snd_soc_dai *cpu_dai = card->dai_link[i].cpu_dai;
			if (cpu_dai->remove)
				cpu_dai->remove(pdev, cpu_dai);
		}
F
Frank Mandarino 已提交
1364

1365 1366
		if (card->remove)
			card->remove(pdev);
F
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1367 1368
	}

M
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1369 1370
	snd_soc_unregister_card(card);

F
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1371 1372 1373
	return 0;
}

M
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1374
static int soc_poweroff(struct device *dev)
M
Mark Brown 已提交
1375
{
M
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1376
	struct platform_device *pdev = to_platform_device(dev);
M
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1377 1378 1379 1380
	struct snd_soc_device *socdev = platform_get_drvdata(pdev);
	struct snd_soc_card *card = socdev->card;

	if (!card->instantiated)
M
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1381
		return 0;
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1382 1383 1384 1385 1386 1387

	/* Flush out pmdown_time work - we actually do want to run it
	 * now, we're shutting down so no imminent restart. */
	run_delayed_work(&card->delayed_work);

	snd_soc_dapm_shutdown(socdev);
M
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1388 1389

	return 0;
M
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1390 1391
}

1392
static const struct dev_pm_ops soc_pm_ops = {
M
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1393 1394 1395 1396 1397
	.suspend = soc_suspend,
	.resume = soc_resume,
	.poweroff = soc_poweroff,
};

F
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1398 1399 1400 1401
/* ASoC platform driver */
static struct platform_driver soc_driver = {
	.driver		= {
		.name		= "soc-audio",
1402
		.owner		= THIS_MODULE,
M
Mark Brown 已提交
1403
		.pm		= &soc_pm_ops,
F
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1404 1405 1406 1407 1408 1409 1410 1411 1412
	},
	.probe		= soc_probe,
	.remove		= soc_remove,
};

/* create a new pcm */
static int soc_new_pcm(struct snd_soc_device *socdev,
	struct snd_soc_dai_link *dai_link, int num)
{
1413
	struct snd_soc_card *card = socdev->card;
1414
	struct snd_soc_codec *codec = card->codec;
1415
	struct snd_soc_platform *platform = card->platform;
1416 1417
	struct snd_soc_dai *codec_dai = dai_link->codec_dai;
	struct snd_soc_dai *cpu_dai = dai_link->cpu_dai;
F
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1418 1419 1420 1421 1422 1423 1424 1425
	struct snd_soc_pcm_runtime *rtd;
	struct snd_pcm *pcm;
	char new_name[64];
	int ret = 0, playback = 0, capture = 0;

	rtd = kzalloc(sizeof(struct snd_soc_pcm_runtime), GFP_KERNEL);
	if (rtd == NULL)
		return -ENOMEM;
1426 1427

	rtd->dai = dai_link;
F
Frank Mandarino 已提交
1428
	rtd->socdev = socdev;
1429
	codec_dai->codec = card->codec;
F
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1430 1431

	/* check client and interface hw capabilities */
1432 1433
	snprintf(new_name, sizeof(new_name), "%s %s-%d",
		 dai_link->stream_name, codec_dai->name, num);
F
Frank Mandarino 已提交
1434 1435 1436 1437 1438 1439 1440 1441 1442

	if (codec_dai->playback.channels_min)
		playback = 1;
	if (codec_dai->capture.channels_min)
		capture = 1;

	ret = snd_pcm_new(codec->card, new_name, codec->pcm_devs++, playback,
		capture, &pcm);
	if (ret < 0) {
1443 1444
		printk(KERN_ERR "asoc: can't create pcm for codec %s\n",
			codec->name);
F
Frank Mandarino 已提交
1445 1446 1447 1448
		kfree(rtd);
		return ret;
	}

1449
	dai_link->pcm = pcm;
F
Frank Mandarino 已提交
1450
	pcm->private_data = rtd;
1451 1452 1453 1454 1455 1456
	soc_pcm_ops.mmap = platform->pcm_ops->mmap;
	soc_pcm_ops.ioctl = platform->pcm_ops->ioctl;
	soc_pcm_ops.copy = platform->pcm_ops->copy;
	soc_pcm_ops.silence = platform->pcm_ops->silence;
	soc_pcm_ops.ack = platform->pcm_ops->ack;
	soc_pcm_ops.page = platform->pcm_ops->page;
F
Frank Mandarino 已提交
1457 1458 1459 1460 1461 1462 1463

	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);

1464
	ret = platform->pcm_new(codec->card, codec_dai, pcm);
F
Frank Mandarino 已提交
1465 1466 1467 1468 1469 1470
	if (ret < 0) {
		printk(KERN_ERR "asoc: platform pcm constructor failed\n");
		kfree(rtd);
		return ret;
	}

1471
	pcm->private_free = platform->pcm_free;
F
Frank Mandarino 已提交
1472 1473 1474 1475 1476
	printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
		cpu_dai->name);
	return ret;
}

1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493
/**
 * snd_soc_codec_volatile_register: Report if a register is volatile.
 *
 * @codec: CODEC to query.
 * @reg: Register to query.
 *
 * Boolean function indiciating if a CODEC register is volatile.
 */
int snd_soc_codec_volatile_register(struct snd_soc_codec *codec, int reg)
{
	if (codec->volatile_register)
		return codec->volatile_register(reg);
	else
		return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_codec_volatile_register);

F
Frank Mandarino 已提交
1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
/**
 * snd_soc_new_ac97_codec - initailise AC97 device
 * @codec: audio codec
 * @ops: AC97 bus operations
 * @num: AC97 codec number
 *
 * Initialises AC97 codec resources for use by ad-hoc devices only.
 */
int snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
	struct snd_ac97_bus_ops *ops, int num)
{
	mutex_lock(&codec->mutex);

	codec->ac97 = kzalloc(sizeof(struct snd_ac97), GFP_KERNEL);
	if (codec->ac97 == NULL) {
		mutex_unlock(&codec->mutex);
		return -ENOMEM;
	}

	codec->ac97->bus = kzalloc(sizeof(struct snd_ac97_bus), GFP_KERNEL);
	if (codec->ac97->bus == NULL) {
		kfree(codec->ac97);
		codec->ac97 = NULL;
		mutex_unlock(&codec->mutex);
		return -ENOMEM;
	}

	codec->ac97->bus->ops = ops;
	codec->ac97->num = num;
1523
	codec->dev = &codec->ac97->dev;
F
Frank Mandarino 已提交
1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556
	mutex_unlock(&codec->mutex);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);

/**
 * snd_soc_free_ac97_codec - free AC97 codec device
 * @codec: audio codec
 *
 * Frees AC97 codec device resources.
 */
void snd_soc_free_ac97_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&codec->mutex);
	kfree(codec->ac97->bus);
	kfree(codec->ac97);
	codec->ac97 = NULL;
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_ac97_codec);

/**
 * snd_soc_update_bits - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_update_bits(struct snd_soc_codec *codec, unsigned short reg,
1557
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1558 1559
{
	int change;
1560
	unsigned int old, new;
F
Frank Mandarino 已提交
1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571

	old = snd_soc_read(codec, reg);
	new = (old & ~mask) | value;
	change = old != new;
	if (change)
		snd_soc_write(codec, reg, new);

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_update_bits);

1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582
/**
 * snd_soc_update_bits_locked - update codec register bits
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Writes new register value, and takes the codec mutex.
 *
 * Returns 1 for change else 0.
 */
1583 1584 1585
int snd_soc_update_bits_locked(struct snd_soc_codec *codec,
			       unsigned short reg, unsigned int mask,
			       unsigned int value)
1586 1587 1588 1589 1590 1591 1592 1593 1594
{
	int change;

	mutex_lock(&codec->mutex);
	change = snd_soc_update_bits(codec, reg, mask, value);
	mutex_unlock(&codec->mutex);

	return change;
}
1595
EXPORT_SYMBOL_GPL(snd_soc_update_bits_locked);
1596

F
Frank Mandarino 已提交
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609
/**
 * snd_soc_test_bits - test register for change
 * @codec: audio codec
 * @reg: codec register
 * @mask: register mask
 * @value: new value
 *
 * Tests a register with a new value and checks if the new value is
 * different from the old value.
 *
 * Returns 1 for change else 0.
 */
int snd_soc_test_bits(struct snd_soc_codec *codec, unsigned short reg,
1610
				unsigned int mask, unsigned int value)
F
Frank Mandarino 已提交
1611 1612
{
	int change;
1613
	unsigned int old, new;
F
Frank Mandarino 已提交
1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625

	old = snd_soc_read(codec, reg);
	new = (old & ~mask) | value;
	change = old != new;

	return change;
}
EXPORT_SYMBOL_GPL(snd_soc_test_bits);

/**
 * snd_soc_new_pcms - create new sound card and pcms
 * @socdev: the SoC audio device
M
Mark Brown 已提交
1626 1627
 * @idx: ALSA card index
 * @xid: card identification
F
Frank Mandarino 已提交
1628 1629 1630 1631 1632
 *
 * Create a new sound card based upon the codec and interface pcms.
 *
 * Returns 0 for success, else error.
 */
1633
int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
F
Frank Mandarino 已提交
1634
{
1635
	struct snd_soc_card *card = socdev->card;
1636
	struct snd_soc_codec *codec = card->codec;
1637
	int ret, i;
F
Frank Mandarino 已提交
1638 1639 1640 1641

	mutex_lock(&codec->mutex);

	/* register a sound card */
1642 1643
	ret = snd_card_create(idx, xid, codec->owner, 0, &codec->card);
	if (ret < 0) {
F
Frank Mandarino 已提交
1644 1645 1646
		printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
			codec->name);
		mutex_unlock(&codec->mutex);
1647
		return ret;
F
Frank Mandarino 已提交
1648 1649
	}

1650
	codec->socdev = socdev;
F
Frank Mandarino 已提交
1651 1652 1653 1654 1655
	codec->card->dev = socdev->dev;
	codec->card->private_data = codec;
	strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));

	/* create the pcms */
1656 1657
	for (i = 0; i < card->num_links; i++) {
		ret = soc_new_pcm(socdev, &card->dai_link[i], i);
F
Frank Mandarino 已提交
1658 1659
		if (ret < 0) {
			printk(KERN_ERR "asoc: can't create pcm %s\n",
1660
				card->dai_link[i].stream_name);
F
Frank Mandarino 已提交
1661 1662 1663
			mutex_unlock(&codec->mutex);
			return ret;
		}
1664 1665
		/* Check for codec->ac97 to handle the ac97.c fun */
		if (card->dai_link[i].codec_dai->ac97_control && codec->ac97) {
1666 1667 1668
			snd_ac97_dev_add_pdata(codec->ac97,
				card->dai_link[i].cpu_dai->ac97_pdata);
		}
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Frank Mandarino 已提交
1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684
	}

	mutex_unlock(&codec->mutex);
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_new_pcms);

/**
 * snd_soc_free_pcms - free sound card and pcms
 * @socdev: the SoC audio device
 *
 * Frees sound card and pcms associated with the socdev.
 * Also unregister the codec if it is an AC97 device.
 */
void snd_soc_free_pcms(struct snd_soc_device *socdev)
{
1685
	struct snd_soc_codec *codec = socdev->card->codec;
1686
#ifdef CONFIG_SND_SOC_AC97_BUS
1687
	struct snd_soc_dai *codec_dai;
1688 1689
	int i;
#endif
F
Frank Mandarino 已提交
1690 1691

	mutex_lock(&codec->mutex);
1692
	soc_cleanup_codec_debugfs(codec);
F
Frank Mandarino 已提交
1693
#ifdef CONFIG_SND_SOC_AC97_BUS
1694
	for (i = 0; i < codec->num_dai; i++) {
1695
		codec_dai = &codec->dai[i];
1696 1697
		if (codec_dai->ac97_control && codec->ac97 &&
		    strcmp(codec->name, "AC97") != 0) {
1698 1699 1700 1701 1702
			soc_ac97_dev_unregister(codec);
			goto free_card;
		}
	}
free_card:
F
Frank Mandarino 已提交
1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738
#endif

	if (codec->card)
		snd_card_free(codec->card);
	device_remove_file(socdev->dev, &dev_attr_codec_reg);
	mutex_unlock(&codec->mutex);
}
EXPORT_SYMBOL_GPL(snd_soc_free_pcms);

/**
 * snd_soc_set_runtime_hwparams - set the runtime hardware parameters
 * @substream: the pcm substream
 * @hw: the hardware parameters
 *
 * Sets the substream runtime hardware parameters.
 */
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
	const struct snd_pcm_hardware *hw)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	runtime->hw.info = hw->info;
	runtime->hw.formats = hw->formats;
	runtime->hw.period_bytes_min = hw->period_bytes_min;
	runtime->hw.period_bytes_max = hw->period_bytes_max;
	runtime->hw.periods_min = hw->periods_min;
	runtime->hw.periods_max = hw->periods_max;
	runtime->hw.buffer_bytes_max = hw->buffer_bytes_max;
	runtime->hw.fifo_size = hw->fifo_size;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_set_runtime_hwparams);

/**
 * snd_soc_cnew - create new control
 * @_template: control template
 * @data: control private data
M
Mark Brown 已提交
1739
 * @long_name: control long name
F
Frank Mandarino 已提交
1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758
 *
 * Create a new mixer control from a template control.
 *
 * Returns 0 for success, else error.
 */
struct snd_kcontrol *snd_soc_cnew(const struct snd_kcontrol_new *_template,
	void *data, char *long_name)
{
	struct snd_kcontrol_new template;

	memcpy(&template, _template, sizeof(template));
	if (long_name)
		template.name = long_name;
	template.index = 0;

	return snd_ctl_new1(&template, data);
}
EXPORT_SYMBOL_GPL(snd_soc_cnew);

I
Ian Molton 已提交
1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789
/**
 * snd_soc_add_controls - add an array of controls to a codec.
 * Convienience function to add a list of controls. Many codecs were
 * duplicating this code.
 *
 * @codec: codec to add controls to
 * @controls: array of controls to add
 * @num_controls: number of elements in the array
 *
 * Return 0 for success, else error.
 */
int snd_soc_add_controls(struct snd_soc_codec *codec,
	const struct snd_kcontrol_new *controls, int num_controls)
{
	struct snd_card *card = codec->card;
	int err, i;

	for (i = 0; i < num_controls; i++) {
		const struct snd_kcontrol_new *control = &controls[i];
		err = snd_ctl_add(card, snd_soc_cnew(control, codec, NULL));
		if (err < 0) {
			dev_err(codec->dev, "%s: Failed to add %s\n",
				codec->name, control->name);
			return err;
		}
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_add_controls);

F
Frank Mandarino 已提交
1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806
/**
 * snd_soc_info_enum_double - enumerated double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double enumerated
 * mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = e->shift_l == e->shift_r ? 1 : 2;
1807
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1808

1809 1810
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1811 1812 1813 1814 1815 1816 1817 1818 1819
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_double);

/**
 * snd_soc_get_enum_double - enumerated double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
1820
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1821 1822 1823 1824 1825 1826 1827 1828 1829 1830
 *
 * Callback to get the value of a double enumerated mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_get_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1831
	unsigned int val, bitmask;
F
Frank Mandarino 已提交
1832

1833
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1834 1835
		;
	val = snd_soc_read(codec, e->reg);
1836 1837
	ucontrol->value.enumerated.item[0]
		= (val >> e->shift_l) & (bitmask - 1);
F
Frank Mandarino 已提交
1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848
	if (e->shift_l != e->shift_r)
		ucontrol->value.enumerated.item[1] =
			(val >> e->shift_r) & (bitmask - 1);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_enum_double);

/**
 * snd_soc_put_enum_double - enumerated double mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
1849
 * @ucontrol: control element information
F
Frank Mandarino 已提交
1850 1851 1852 1853 1854 1855 1856 1857 1858 1859
 *
 * Callback to set the value of a double enumerated mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_put_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1860 1861
	unsigned int val;
	unsigned int mask, bitmask;
F
Frank Mandarino 已提交
1862

1863
	for (bitmask = 1; bitmask < e->max; bitmask <<= 1)
F
Frank Mandarino 已提交
1864
		;
1865
	if (ucontrol->value.enumerated.item[0] > e->max - 1)
F
Frank Mandarino 已提交
1866 1867 1868 1869
		return -EINVAL;
	val = ucontrol->value.enumerated.item[0] << e->shift_l;
	mask = (bitmask - 1) << e->shift_l;
	if (e->shift_l != e->shift_r) {
1870
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
F
Frank Mandarino 已提交
1871 1872 1873 1874 1875
			return -EINVAL;
		val |= ucontrol->value.enumerated.item[1] << e->shift_r;
		mask |= (bitmask - 1) << e->shift_r;
	}

1876
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
F
Frank Mandarino 已提交
1877 1878 1879
}
EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);

P
Peter Ujfalusi 已提交
1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895
/**
 * snd_soc_get_value_enum_double - semi enumerated double mixer get callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to get the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_get_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1896
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1897
	unsigned int reg_val, val, mux;
P
Peter Ujfalusi 已提交
1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934

	reg_val = snd_soc_read(codec, e->reg);
	val = (reg_val >> e->shift_l) & e->mask;
	for (mux = 0; mux < e->max; mux++) {
		if (val == e->values[mux])
			break;
	}
	ucontrol->value.enumerated.item[0] = mux;
	if (e->shift_l != e->shift_r) {
		val = (reg_val >> e->shift_r) & e->mask;
		for (mux = 0; mux < e->max; mux++) {
			if (val == e->values[mux])
				break;
		}
		ucontrol->value.enumerated.item[1] = mux;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_value_enum_double);

/**
 * snd_soc_put_value_enum_double - semi enumerated double mixer put callback
 * @kcontrol: mixer control
 * @ucontrol: control element information
 *
 * Callback to set the value of a double semi enumerated mixer.
 *
 * Semi enumerated mixer: the enumerated items are referred as values. Can be
 * used for handling bitfield coded enumeration for example.
 *
 * Returns 0 for success.
 */
int snd_soc_put_value_enum_double(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
1935
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
1936 1937
	unsigned int val;
	unsigned int mask;
P
Peter Ujfalusi 已提交
1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949

	if (ucontrol->value.enumerated.item[0] > e->max - 1)
		return -EINVAL;
	val = e->values[ucontrol->value.enumerated.item[0]] << e->shift_l;
	mask = e->mask << e->shift_l;
	if (e->shift_l != e->shift_r) {
		if (ucontrol->value.enumerated.item[1] > e->max - 1)
			return -EINVAL;
		val |= e->values[ucontrol->value.enumerated.item[1]] << e->shift_r;
		mask |= e->mask << e->shift_r;
	}

1950
	return snd_soc_update_bits_locked(codec, e->reg, mask, val);
P
Peter Ujfalusi 已提交
1951 1952 1953
}
EXPORT_SYMBOL_GPL(snd_soc_put_value_enum_double);

F
Frank Mandarino 已提交
1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970
/**
 * snd_soc_info_enum_ext - external enumerated single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about an external enumerated
 * single mixer.
 *
 * Returns 0 for success.
 */
int snd_soc_info_enum_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
1971
	uinfo->value.enumerated.items = e->max;
F
Frank Mandarino 已提交
1972

1973 1974
	if (uinfo->value.enumerated.item > e->max - 1)
		uinfo->value.enumerated.item = e->max - 1;
F
Frank Mandarino 已提交
1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992
	strcpy(uinfo->value.enumerated.name,
		e->texts[uinfo->value.enumerated.item]);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_enum_ext);

/**
 * snd_soc_info_volsw_ext - external single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single external mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_ext(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
P
Philipp Zabel 已提交
1993 1994
	int max = kcontrol->private_value;

1995
	if (max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
1996 1997 1998
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
1999 2000 2001

	uinfo->count = 1;
	uinfo->value.integer.min = 0;
P
Philipp Zabel 已提交
2002
	uinfo->value.integer.max = max;
F
Frank Mandarino 已提交
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);

/**
 * snd_soc_info_volsw - single mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2019 2020
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2021
	int platform_max;
2022
	unsigned int shift = mc->shift;
2023
	unsigned int rshift = mc->rshift;
F
Frank Mandarino 已提交
2024

2025 2026 2027 2028 2029
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2030 2031 2032 2033
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;

F
Frank Mandarino 已提交
2034 2035
	uinfo->count = shift == rshift ? 1 : 2;
	uinfo->value.integer.min = 0;
2036
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2037 2038 2039 2040 2041 2042 2043
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw);

/**
 * snd_soc_get_volsw - single mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2044
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2045 2046 2047 2048 2049 2050 2051 2052
 *
 * Callback to get the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2053 2054
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2055
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2056 2057 2058
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2059
	int max = mc->max;
2060 2061
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2062 2063 2064 2065 2066 2067 2068 2069

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	if (shift != rshift)
		ucontrol->value.integer.value[1] =
			(snd_soc_read(codec, reg) >> rshift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2070
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2071 2072
		if (shift != rshift)
			ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2073
				max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2074 2075 2076 2077 2078 2079 2080 2081 2082
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw);

/**
 * snd_soc_put_volsw - single mixer put callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2083
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2084 2085 2086 2087 2088 2089 2090 2091
 *
 * Callback to set the value of a single mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2092 2093
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2094
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2095 2096 2097
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int rshift = mc->rshift;
2098
	int max = mc->max;
2099 2100
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
2101
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2102 2103 2104

	val = (ucontrol->value.integer.value[0] & mask);
	if (invert)
P
Philipp Zabel 已提交
2105
		val = max - val;
F
Frank Mandarino 已提交
2106 2107 2108 2109 2110
	val_mask = mask << shift;
	val = val << shift;
	if (shift != rshift) {
		val2 = (ucontrol->value.integer.value[1] & mask);
		if (invert)
P
Philipp Zabel 已提交
2111
			val2 = max - val2;
F
Frank Mandarino 已提交
2112 2113 2114
		val_mask |= mask << rshift;
		val |= val2 << rshift;
	}
2115
	return snd_soc_update_bits_locked(codec, reg, val_mask, val);
F
Frank Mandarino 已提交
2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw);

/**
 * snd_soc_info_volsw_2r - double mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a double mixer control that
 * spans 2 codec registers.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2132 2133
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2134
	int platform_max;
P
Philipp Zabel 已提交
2135

2136 2137 2138 2139 2140
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

	if (platform_max == 1 && !strstr(kcontrol->id.name, " Volume"))
P
Philipp Zabel 已提交
2141 2142 2143
		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	else
		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
F
Frank Mandarino 已提交
2144 2145 2146

	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2147
	uinfo->value.integer.max = platform_max;
F
Frank Mandarino 已提交
2148 2149 2150 2151 2152 2153 2154
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);

/**
 * snd_soc_get_volsw_2r - double mixer get callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2155
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2156 2157 2158 2159 2160 2161 2162 2163
 *
 * Callback to get the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2164 2165
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2166
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2167 2168 2169
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2170
	int max = mc->max;
2171
	unsigned int mask = (1 << fls(max)) - 1;
2172
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2173 2174 2175 2176 2177 2178 2179

	ucontrol->value.integer.value[0] =
		(snd_soc_read(codec, reg) >> shift) & mask;
	ucontrol->value.integer.value[1] =
		(snd_soc_read(codec, reg2) >> shift) & mask;
	if (invert) {
		ucontrol->value.integer.value[0] =
P
Philipp Zabel 已提交
2180
			max - ucontrol->value.integer.value[0];
F
Frank Mandarino 已提交
2181
		ucontrol->value.integer.value[1] =
P
Philipp Zabel 已提交
2182
			max - ucontrol->value.integer.value[1];
F
Frank Mandarino 已提交
2183 2184 2185 2186 2187 2188 2189 2190 2191
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);

/**
 * snd_soc_put_volsw_2r - double mixer set callback
 * @kcontrol: mixer control
M
Mark Brown 已提交
2192
 * @ucontrol: control element information
F
Frank Mandarino 已提交
2193 2194 2195 2196 2197 2198 2199 2200
 *
 * Callback to set the value of a double mixer control that spans 2 registers.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2201 2202
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
F
Frank Mandarino 已提交
2203
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2204 2205 2206
	unsigned int reg = mc->reg;
	unsigned int reg2 = mc->rreg;
	unsigned int shift = mc->shift;
2207
	int max = mc->max;
2208 2209
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
F
Frank Mandarino 已提交
2210
	int err;
2211
	unsigned int val, val2, val_mask;
F
Frank Mandarino 已提交
2212 2213 2214 2215 2216 2217

	val_mask = mask << shift;
	val = (ucontrol->value.integer.value[0] & mask);
	val2 = (ucontrol->value.integer.value[1] & mask);

	if (invert) {
P
Philipp Zabel 已提交
2218 2219
		val = max - val;
		val2 = max - val2;
F
Frank Mandarino 已提交
2220 2221 2222 2223 2224
	}

	val = val << shift;
	val2 = val2 << shift;

2225
	err = snd_soc_update_bits_locked(codec, reg, val_mask, val);
2226
	if (err < 0)
F
Frank Mandarino 已提交
2227 2228
		return err;

2229
	err = snd_soc_update_bits_locked(codec, reg2, val_mask, val2);
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2230 2231 2232 2233
	return err;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);

2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245
/**
 * snd_soc_info_volsw_s8 - signed mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Callback to provide information about a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_info *uinfo)
{
2246 2247
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2248
	int platform_max;
2249
	int min = mc->min;
2250

2251 2252 2253 2254
	if (!mc->platform_max)
		mc->platform_max = mc->max;
	platform_max = mc->platform_max;

2255 2256 2257
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
2258
	uinfo->value.integer.max = platform_max - min;
2259 2260 2261 2262 2263 2264 2265
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_s8);

/**
 * snd_soc_get_volsw_s8 - signed mixer get callback
 * @kcontrol: mixer control
M
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2266
 * @ucontrol: control element information
2267 2268 2269 2270 2271 2272 2273 2274
 *
 * Callback to get the value of a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2275 2276
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2277
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2278
	unsigned int reg = mc->reg;
2279
	int min = mc->min;
2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292
	int val = snd_soc_read(codec, reg);

	ucontrol->value.integer.value[0] =
		((signed char)(val & 0xff))-min;
	ucontrol->value.integer.value[1] =
		((signed char)((val >> 8) & 0xff))-min;
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_s8);

/**
 * snd_soc_put_volsw_sgn - signed mixer put callback
 * @kcontrol: mixer control
M
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2293
 * @ucontrol: control element information
2294 2295 2296 2297 2298 2299 2300 2301
 *
 * Callback to set the value of a signed mixer control.
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_s8(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
2302 2303
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
2304
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
2305
	unsigned int reg = mc->reg;
2306
	int min = mc->min;
2307
	unsigned int val;
2308 2309 2310 2311

	val = (ucontrol->value.integer.value[0]+min) & 0xff;
	val |= ((ucontrol->value.integer.value[1]+min) & 0xff) << 8;

2312
	return snd_soc_update_bits_locked(codec, reg, 0xffff, val);
2313 2314 2315
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_s8);

2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346
/**
 * snd_soc_limit_volume - Set new limit to an existing volume control.
 *
 * @codec: where to look for the control
 * @name: Name of the control
 * @max: new maximum limit
 *
 * Return 0 for success, else error.
 */
int snd_soc_limit_volume(struct snd_soc_codec *codec,
	const char *name, int max)
{
	struct snd_card *card = codec->card;
	struct snd_kcontrol *kctl;
	struct soc_mixer_control *mc;
	int found = 0;
	int ret = -EINVAL;

	/* Sanity check for name and max */
	if (unlikely(!name || max <= 0))
		return -EINVAL;

	list_for_each_entry(kctl, &card->controls, list) {
		if (!strncmp(kctl->id.name, name, sizeof(kctl->id.name))) {
			found = 1;
			break;
		}
	}
	if (found) {
		mc = (struct soc_mixer_control *)kctl->private_value;
		if (max <= mc->max) {
2347
			mc->platform_max = max;
2348 2349 2350 2351 2352 2353 2354
			ret = 0;
		}
	}
	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_limit_volume);

2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435
/**
 * snd_soc_info_volsw_2r_sx - double with tlv and variable data size
 *  mixer info callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_info_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_info *uinfo)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	int max = mc->max;
	int min = mc->min;

	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = max-min;

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r_sx);

/**
 * snd_soc_get_volsw_2r_sx - double with tlv and variable data size
 *  mixer get callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int mask = (1<<mc->shift)-1;
	int min = mc->min;
	int val = snd_soc_read(codec, mc->reg) & mask;
	int valr = snd_soc_read(codec, mc->rreg) & mask;

	ucontrol->value.integer.value[0] = ((val & 0xff)-min);
	ucontrol->value.integer.value[1] = ((valr & 0xff)-min);
	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r_sx);

/**
 * snd_soc_put_volsw_2r_sx - double with tlv and variable data size
 *  mixer put callback
 * @kcontrol: mixer control
 * @uinfo: control element information
 *
 * Returns 0 for success.
 */
int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol,
			struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
	unsigned int mask = (1<<mc->shift)-1;
	int min = mc->min;
	int ret;
	unsigned int val, valr, oval, ovalr;

	val = ((ucontrol->value.integer.value[0]+min) & 0xff);
	val &= mask;
	valr = ((ucontrol->value.integer.value[1]+min) & 0xff);
	valr &= mask;

	oval = snd_soc_read(codec, mc->reg) & mask;
	ovalr = snd_soc_read(codec, mc->rreg) & mask;

	ret = 0;
	if (oval != val) {
		ret = snd_soc_write(codec, mc->reg, val);
		if (ret < 0)
2436
			return ret;
2437 2438 2439 2440
	}
	if (ovalr != valr) {
		ret = snd_soc_write(codec, mc->rreg, valr);
		if (ret < 0)
2441
			return ret;
2442 2443 2444 2445 2446 2447
	}

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r_sx);

2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459
/**
 * snd_soc_dai_set_sysclk - configure DAI system or master clock.
 * @dai: DAI
 * @clk_id: DAI specific clock ID
 * @freq: new clock frequency in Hz
 * @dir: new clock direction - input/output.
 *
 * Configures the DAI master (MCLK) or system (SYSCLK) clocking.
 */
int snd_soc_dai_set_sysclk(struct snd_soc_dai *dai, int clk_id,
	unsigned int freq, int dir)
{
2460
	if (dai->ops && dai->ops->set_sysclk)
2461
		return dai->ops->set_sysclk(dai, clk_id, freq, dir);
2462 2463 2464 2465 2466 2467 2468 2469
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_sysclk);

/**
 * snd_soc_dai_set_clkdiv - configure DAI clock dividers.
 * @dai: DAI
M
Mark Brown 已提交
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 * @div_id: DAI specific clock divider ID
2471 2472 2473 2474 2475 2476 2477 2478 2479
 * @div: new clock divisor.
 *
 * Configures the clock dividers. This is used to derive the best DAI bit and
 * frame clocks from the system or master clock. It's best to set the DAI bit
 * and frame clocks as low as possible to save system power.
 */
int snd_soc_dai_set_clkdiv(struct snd_soc_dai *dai,
	int div_id, int div)
{
2480
	if (dai->ops && dai->ops->set_clkdiv)
2481
		return dai->ops->set_clkdiv(dai, div_id, div);
2482 2483 2484 2485 2486 2487 2488 2489 2490
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_clkdiv);

/**
 * snd_soc_dai_set_pll - configure DAI PLL.
 * @dai: DAI
 * @pll_id: DAI specific PLL ID
2491
 * @source: DAI specific source for the PLL
2492 2493 2494 2495 2496
 * @freq_in: PLL input clock frequency in Hz
 * @freq_out: requested PLL output clock frequency in Hz
 *
 * Configures and enables PLL to generate output clock based on input clock.
 */
2497 2498
int snd_soc_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
	unsigned int freq_in, unsigned int freq_out)
2499
{
2500
	if (dai->ops && dai->ops->set_pll)
2501 2502
		return dai->ops->set_pll(dai, pll_id, source,
					 freq_in, freq_out);
2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_pll);

/**
 * snd_soc_dai_set_fmt - configure DAI hardware audio format.
 * @dai: DAI
 * @fmt: SND_SOC_DAIFMT_ format value.
 *
 * Configures the DAI hardware format and clocking.
 */
int snd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
2517
	if (dai->ops && dai->ops->set_fmt)
2518
		return dai->ops->set_fmt(dai, fmt);
2519 2520 2521 2522 2523 2524 2525 2526
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_fmt);

/**
 * snd_soc_dai_set_tdm_slot - configure DAI TDM.
 * @dai: DAI
2527 2528
 * @tx_mask: bitmask representing active TX slots.
 * @rx_mask: bitmask representing active RX slots.
2529
 * @slots: Number of slots in use.
2530
 * @slot_width: Width in bits for each slot.
2531 2532 2533 2534 2535
 *
 * Configures a DAI for TDM operation. Both mask and slots are codec and DAI
 * specific.
 */
int snd_soc_dai_set_tdm_slot(struct snd_soc_dai *dai,
2536
	unsigned int tx_mask, unsigned int rx_mask, int slots, int slot_width)
2537
{
2538
	if (dai->ops && dai->ops->set_tdm_slot)
2539 2540
		return dai->ops->set_tdm_slot(dai, tx_mask, rx_mask,
				slots, slot_width);
2541 2542 2543 2544 2545
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tdm_slot);

2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569
/**
 * snd_soc_dai_set_channel_map - configure DAI audio channel map
 * @dai: DAI
 * @tx_num: how many TX channels
 * @tx_slot: pointer to an array which imply the TX slot number channel
 *           0~num-1 uses
 * @rx_num: how many RX channels
 * @rx_slot: pointer to an array which imply the RX slot number channel
 *           0~num-1 uses
 *
 * configure the relationship between channel number and TDM slot number.
 */
int snd_soc_dai_set_channel_map(struct snd_soc_dai *dai,
	unsigned int tx_num, unsigned int *tx_slot,
	unsigned int rx_num, unsigned int *rx_slot)
{
	if (dai->ops && dai->ops->set_channel_map)
		return dai->ops->set_channel_map(dai, tx_num, tx_slot,
			rx_num, rx_slot);
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_channel_map);

2570 2571 2572 2573 2574 2575 2576 2577 2578
/**
 * snd_soc_dai_set_tristate - configure DAI system or master clock.
 * @dai: DAI
 * @tristate: tristate enable
 *
 * Tristates the DAI so that others can use it.
 */
int snd_soc_dai_set_tristate(struct snd_soc_dai *dai, int tristate)
{
2579
	if (dai->ops && dai->ops->set_tristate)
2580
		return dai->ops->set_tristate(dai, tristate);
2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_set_tristate);

/**
 * snd_soc_dai_digital_mute - configure DAI system or master clock.
 * @dai: DAI
 * @mute: mute enable
 *
 * Mutes the DAI DAC.
 */
int snd_soc_dai_digital_mute(struct snd_soc_dai *dai, int mute)
{
2595
	if (dai->ops && dai->ops->digital_mute)
2596
		return dai->ops->digital_mute(dai, mute);
2597 2598 2599 2600 2601
	else
		return -EINVAL;
}
EXPORT_SYMBOL_GPL(snd_soc_dai_digital_mute);

M
Mark Brown 已提交
2602 2603 2604
/**
 * snd_soc_register_card - Register a card with the ASoC core
 *
M
Mark Brown 已提交
2605
 * @card: Card to register
M
Mark Brown 已提交
2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_register_card(struct snd_soc_card *card)
{
	if (!card->name || !card->dev)
		return -EINVAL;

	INIT_LIST_HEAD(&card->list);
	card->instantiated = 0;

	mutex_lock(&client_mutex);
	list_add(&card->list, &card_list);
2621
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2622 2623 2624 2625 2626 2627 2628 2629 2630 2631
	mutex_unlock(&client_mutex);

	dev_dbg(card->dev, "Registered card '%s'\n", card->name);

	return 0;
}

/**
 * snd_soc_unregister_card - Unregister a card with the ASoC core
 *
M
Mark Brown 已提交
2632
 * @card: Card to unregister
M
Mark Brown 已提交
2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648
 *
 * Note that currently this is an internal only function: it will be
 * exposed to machine drivers after further backporting of ASoC v2
 * registration APIs.
 */
static int snd_soc_unregister_card(struct snd_soc_card *card)
{
	mutex_lock(&client_mutex);
	list_del(&card->list);
	mutex_unlock(&client_mutex);

	dev_dbg(card->dev, "Unregistered card '%s'\n", card->name);

	return 0;
}

M
Mark Brown 已提交
2649 2650 2651
/**
 * snd_soc_register_dai - Register a DAI with the ASoC core
 *
M
Mark Brown 已提交
2652
 * @dai: DAI to register
M
Mark Brown 已提交
2653 2654 2655 2656 2657 2658 2659 2660 2661 2662
 */
int snd_soc_register_dai(struct snd_soc_dai *dai)
{
	if (!dai->name)
		return -EINVAL;

	/* The device should become mandatory over time */
	if (!dai->dev)
		printk(KERN_WARNING "No device for DAI %s\n", dai->name);

2663 2664 2665
	if (!dai->ops)
		dai->ops = &null_dai_ops;

M
Mark Brown 已提交
2666 2667 2668 2669
	INIT_LIST_HEAD(&dai->list);

	mutex_lock(&client_mutex);
	list_add(&dai->list, &dai_list);
2670
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681
	mutex_unlock(&client_mutex);

	pr_debug("Registered DAI '%s'\n", dai->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dai);

/**
 * snd_soc_unregister_dai - Unregister a DAI from the ASoC core
 *
M
Mark Brown 已提交
2682
 * @dai: DAI to unregister
M
Mark Brown 已提交
2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696
 */
void snd_soc_unregister_dai(struct snd_soc_dai *dai)
{
	mutex_lock(&client_mutex);
	list_del(&dai->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered DAI '%s'\n", dai->name);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dai);

/**
 * snd_soc_register_dais - Register multiple DAIs with the ASoC core
 *
M
Mark Brown 已提交
2697 2698
 * @dai: Array of DAIs to register
 * @count: Number of DAIs
M
Mark Brown 已提交
2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722
 */
int snd_soc_register_dais(struct snd_soc_dai *dai, size_t count)
{
	int i, ret;

	for (i = 0; i < count; i++) {
		ret = snd_soc_register_dai(&dai[i]);
		if (ret != 0)
			goto err;
	}

	return 0;

err:
	for (i--; i >= 0; i--)
		snd_soc_unregister_dai(&dai[i]);

	return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_register_dais);

/**
 * snd_soc_unregister_dais - Unregister multiple DAIs from the ASoC core
 *
M
Mark Brown 已提交
2723 2724
 * @dai: Array of DAIs to unregister
 * @count: Number of DAIs
M
Mark Brown 已提交
2725 2726 2727 2728 2729 2730 2731 2732 2733 2734
 */
void snd_soc_unregister_dais(struct snd_soc_dai *dai, size_t count)
{
	int i;

	for (i = 0; i < count; i++)
		snd_soc_unregister_dai(&dai[i]);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_dais);

M
Mark Brown 已提交
2735 2736 2737
/**
 * snd_soc_register_platform - Register a platform with the ASoC core
 *
M
Mark Brown 已提交
2738
 * @platform: platform to register
M
Mark Brown 已提交
2739 2740 2741 2742 2743 2744 2745 2746 2747 2748
 */
int snd_soc_register_platform(struct snd_soc_platform *platform)
{
	if (!platform->name)
		return -EINVAL;

	INIT_LIST_HEAD(&platform->list);

	mutex_lock(&client_mutex);
	list_add(&platform->list, &platform_list);
2749
	snd_soc_instantiate_cards();
M
Mark Brown 已提交
2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760
	mutex_unlock(&client_mutex);

	pr_debug("Registered platform '%s'\n", platform->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_platform);

/**
 * snd_soc_unregister_platform - Unregister a platform from the ASoC core
 *
M
Mark Brown 已提交
2761
 * @platform: platform to unregister
M
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2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772
 */
void snd_soc_unregister_platform(struct snd_soc_platform *platform)
{
	mutex_lock(&client_mutex);
	list_del(&platform->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered platform '%s'\n", platform->name);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_platform);

2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805
static u64 codec_format_map[] = {
	SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE,
	SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE,
	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE,
	SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE,
	SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
	SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_U32_BE,
	SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
	SNDRV_PCM_FMTBIT_U24_3LE | SNDRV_PCM_FMTBIT_U24_3BE,
	SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE,
	SNDRV_PCM_FMTBIT_U20_3LE | SNDRV_PCM_FMTBIT_U20_3BE,
	SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE,
	SNDRV_PCM_FMTBIT_U18_3LE | SNDRV_PCM_FMTBIT_U18_3BE,
	SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE,
	SNDRV_PCM_FMTBIT_FLOAT64_LE | SNDRV_PCM_FMTBIT_FLOAT64_BE,
	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE
	| SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_BE,
};

/* Fix up the DAI formats for endianness: codecs don't actually see
 * the endianness of the data but we're using the CPU format
 * definitions which do need to include endianness so we ensure that
 * codec DAIs always have both big and little endian variants set.
 */
static void fixup_codec_formats(struct snd_soc_pcm_stream *stream)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(codec_format_map); i++)
		if (stream->formats & codec_format_map[i])
			stream->formats |= codec_format_map[i];
}

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/**
 * snd_soc_register_codec - Register a codec with the ASoC core
 *
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 * @codec: codec to register
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 */
int snd_soc_register_codec(struct snd_soc_codec *codec)
{
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	int i;

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	if (!codec->name)
		return -EINVAL;

	/* The device should become mandatory over time */
	if (!codec->dev)
		printk(KERN_WARNING "No device for codec %s\n", codec->name);

	INIT_LIST_HEAD(&codec->list);

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	for (i = 0; i < codec->num_dai; i++) {
		fixup_codec_formats(&codec->dai[i].playback);
		fixup_codec_formats(&codec->dai[i].capture);
	}

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	mutex_lock(&client_mutex);
	list_add(&codec->list, &codec_list);
	snd_soc_instantiate_cards();
	mutex_unlock(&client_mutex);

	pr_debug("Registered codec '%s'\n", codec->name);

	return 0;
}
EXPORT_SYMBOL_GPL(snd_soc_register_codec);

/**
 * snd_soc_unregister_codec - Unregister a codec from the ASoC core
 *
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 * @codec: codec to unregister
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 */
void snd_soc_unregister_codec(struct snd_soc_codec *codec)
{
	mutex_lock(&client_mutex);
	list_del(&codec->list);
	mutex_unlock(&client_mutex);

	pr_debug("Unregistered codec '%s'\n", codec->name);
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);

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static int __init snd_soc_init(void)
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{
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#ifdef CONFIG_DEBUG_FS
	debugfs_root = debugfs_create_dir("asoc", NULL);
	if (IS_ERR(debugfs_root) || !debugfs_root) {
		printk(KERN_WARNING
		       "ASoC: Failed to create debugfs directory\n");
		debugfs_root = NULL;
	}
#endif

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	return platform_driver_register(&soc_driver);
}

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static void __exit snd_soc_exit(void)
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{
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#ifdef CONFIG_DEBUG_FS
	debugfs_remove_recursive(debugfs_root);
#endif
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	platform_driver_unregister(&soc_driver);
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}

module_init(snd_soc_init);
module_exit(snd_soc_exit);

/* Module information */
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MODULE_AUTHOR("Liam Girdwood, lrg@slimlogic.co.uk");
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MODULE_DESCRIPTION("ALSA SoC Core");
MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:soc-audio");