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- /*
- * soc-core.c -- ALSA SoC Audio Layer
- *
- * Copyright 2005 Wolfson Microelectronics PLC.
- * Copyright 2005 Openedhand Ltd.
- *
- * Author: Liam Girdwood
- * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com
- * with code, comments and ideas from :-
- * Richard Purdie <richard@openedhand.com>
- *
- * 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.
- *
- * Revision history
- * 12th Aug 2005 Initial version.
- * 25th Oct 2005 Working Codec, Interface and Platform registration.
- *
- * 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>
- #include <linux/platform_device.h>
- #include <sound/driver.h>
- #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>
- /* debug */
- #define SOC_DEBUG 0
- #if SOC_DEBUG
- #define dbg(format, arg...) printk(format, ## arg)
- #else
- #define dbg(format, arg...)
- #endif
- static DEFINE_MUTEX(pcm_mutex);
- static DEFINE_MUTEX(io_mutex);
- static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
- /*
- * 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;
- static int pmdown_time = 100;
- module_param(pmdown_time, int, 0);
- MODULE_PARM_DESC(pmdown_time, "DAPM stream powerdown time (msecs)");
- /*
- * 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;
- }
- #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;
- codec->ac97->dev.parent = NULL;
- codec->ac97->dev.release = soc_ac97_device_release;
- snprintf(codec->ac97->dev.bus_id, BUS_ID_SIZE, "%d-%d:%s",
- codec->card->number, 0, codec->name);
- 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
- static inline const char* get_dai_name(int type)
- {
- switch(type) {
- case SND_SOC_DAI_AC97_BUS:
- case SND_SOC_DAI_AC97:
- return "AC97";
- case SND_SOC_DAI_I2S:
- return "I2S";
- case SND_SOC_DAI_PCM:
- return "PCM";
- }
- return NULL;
- }
- /*
- * 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;
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct snd_soc_dai_link *machine = rtd->dai;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
- struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
- int ret = 0;
- mutex_lock(&pcm_mutex);
- /* startup the audio subsystem */
- if (cpu_dai->ops.startup) {
- ret = cpu_dai->ops.startup(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: can't open interface %s\n",
- cpu_dai->name);
- 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;
- }
- }
- if (codec_dai->ops.startup) {
- ret = codec_dai->ops.startup(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: can't open codec %s\n",
- codec_dai->name);
- goto codec_dai_err;
- }
- }
- if (machine->ops && machine->ops->startup) {
- ret = machine->ops->startup(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: %s startup failed\n", machine->name);
- goto machine_err;
- }
- }
- /* Check that the codec and cpu DAI's are compatible */
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- runtime->hw.rate_min =
- max(codec_dai->playback.rate_min, cpu_dai->playback.rate_min);
- runtime->hw.rate_max =
- min(codec_dai->playback.rate_max, cpu_dai->playback.rate_max);
- runtime->hw.channels_min =
- max(codec_dai->playback.channels_min,
- cpu_dai->playback.channels_min);
- runtime->hw.channels_max =
- 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;
- } else {
- runtime->hw.rate_min =
- max(codec_dai->capture.rate_min, cpu_dai->capture.rate_min);
- runtime->hw.rate_max =
- min(codec_dai->capture.rate_max, cpu_dai->capture.rate_max);
- runtime->hw.channels_min =
- max(codec_dai->capture.channels_min,
- cpu_dai->capture.channels_min);
- runtime->hw.channels_max =
- 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;
- }
- snd_pcm_limit_hw_rates(runtime);
- if (!runtime->hw.rates) {
- printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
- codec_dai->name, cpu_dai->name);
- goto machine_err;
- }
- if (!runtime->hw.formats) {
- printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
- codec_dai->name, cpu_dai->name);
- goto machine_err;
- }
- if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
- printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
- codec_dai->name, cpu_dai->name);
- goto machine_err;
- }
- dbg("asoc: %s <-> %s info:\n",codec_dai->name, cpu_dai->name);
- dbg("asoc: rate mask 0x%x\n", runtime->hw.rates);
- dbg("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
- runtime->hw.channels_max);
- dbg("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
- runtime->hw.rate_max);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- cpu_dai->playback.active = codec_dai->playback.active = 1;
- else
- cpu_dai->capture.active = codec_dai->capture.active = 1;
- cpu_dai->active = codec_dai->active = 1;
- cpu_dai->runtime = runtime;
- socdev->codec->active++;
- mutex_unlock(&pcm_mutex);
- return 0;
- machine_err:
- if (machine->ops && machine->ops->shutdown)
- machine->ops->shutdown(substream);
- codec_dai_err:
- if (platform->pcm_ops->close)
- platform->pcm_ops->close(substream);
- platform_err:
- if (cpu_dai->ops.shutdown)
- cpu_dai->ops.shutdown(substream);
- out:
- mutex_unlock(&pcm_mutex);
- return ret;
- }
- /*
- * Power down the audio subsytem pmdown_time msecs after close is called.
- * This is to ensure there are no pops or clicks in between any music tracks
- * due to DAPM power cycling.
- */
- static void close_delayed_work(struct work_struct *work)
- {
- struct snd_soc_device *socdev =
- container_of(work, struct snd_soc_device, delayed_work.work);
- struct snd_soc_codec *codec = socdev->codec;
- struct snd_soc_codec_dai *codec_dai;
- int i;
- mutex_lock(&pcm_mutex);
- for(i = 0; i < codec->num_dai; i++) {
- codec_dai = &codec->dai[i];
- dbg("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");
- /* are we waiting on this codec DAI stream */
- if (codec_dai->pop_wait == 1) {
- /* power down the codec to D1 if no longer active */
- if (codec->active == 0) {
- dbg("pop wq D1 %s %s\n", codec->name,
- codec_dai->playback.stream_name);
- snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D1);
- }
- codec_dai->pop_wait = 0;
- snd_soc_dapm_stream_event(codec, codec_dai->playback.stream_name,
- SND_SOC_DAPM_STREAM_STOP);
- /* power down the codec power domain if no longer active */
- if (codec->active == 0) {
- dbg("pop wq D3 %s %s\n", codec->name,
- codec_dai->playback.stream_name);
- snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D3hot);
- }
- }
- }
- 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;
- struct snd_soc_dai_link *machine = rtd->dai;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
- struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
- struct snd_soc_codec *codec = socdev->codec;
- mutex_lock(&pcm_mutex);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- {
- dbg("%s,%d : current stream = playback\n",__FUNCTION__,__LINE__);
- cpu_dai->playback.active = codec_dai->playback.active = 0;
- }
- else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- {
- dbg("%s,%d : current stream = capture\n",__FUNCTION__,__LINE__);
- cpu_dai->capture.active = codec_dai->capture.active = 0;
- }
- if (codec_dai->playback.active == 0 &&
- codec_dai->capture.active == 0) {
- cpu_dai->active = codec_dai->active = 0;
- }
-
- if (!cpu_dai->playback.active && !cpu_dai->capture.active)
- {
- dbg("%s,%d : Background work is not active.. shutdown DAIs..\n",__FUNCTION__,__LINE__);
- codec->active--;
- if (cpu_dai->ops.shutdown)
- cpu_dai->ops.shutdown(substream);
- if (codec_dai->ops.shutdown)
- codec_dai->ops.shutdown(substream);
- if (machine->ops && machine->ops->shutdown)
- machine->ops->shutdown(substream);
- if (platform->pcm_ops->close)
- platform->pcm_ops->close(substream);
-
- cpu_dai->runtime = NULL;
- }
- else
- {
- dbg("%s,%d : Background work is active..\n",__FUNCTION__,__LINE__);
- }
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- // start delayed pop wq here for playback streams
- codec_dai->pop_wait = 1;
- schedule_delayed_work(&socdev->delayed_work,
- msecs_to_jiffies(pmdown_time));
- } else if (substream->stream == SNDRV_PCM_STREAM_CAPTURE){
- // capture streams can be powered down now
- snd_soc_dapm_stream_event(codec,
- codec_dai->capture.stream_name, SND_SOC_DAPM_STREAM_STOP);
- if (codec->active == 0 && codec_dai->pop_wait == 0)
- snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D3hot);
- }
- 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;
- struct snd_soc_dai_link *machine = rtd->dai;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
- struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
- struct snd_soc_codec *codec = socdev->codec;
- int ret = 0;
- mutex_lock(&pcm_mutex);
- if (machine->ops && machine->ops->prepare) {
- ret = machine->ops->prepare(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: machine prepare error\n");
- goto out;
- }
- }
- if (platform->pcm_ops->prepare) {
- ret = platform->pcm_ops->prepare(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: platform prepare error\n");
- goto out;
- }
- }
- if (codec_dai->ops.prepare) {
- ret = codec_dai->ops.prepare(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: codec DAI prepare error\n");
- goto out;
- }
- }
- if (cpu_dai->ops.prepare) {
- ret = cpu_dai->ops.prepare(substream);
- if (ret < 0) {
- printk(KERN_ERR "asoc: cpu DAI prepare error\n");
- goto out;
- }
- }
- /* we only want to start a DAPM playback stream if we are not waiting
- * on an existing one stopping */
- if (codec_dai->pop_wait) {
- /* we are waiting for the delayed work to start */
- if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
- snd_soc_dapm_stream_event(socdev->codec,
- codec_dai->capture.stream_name,
- SND_SOC_DAPM_STREAM_START);
- else {
- codec_dai->pop_wait = 0;
- cancel_delayed_work(&socdev->delayed_work);
- if (codec_dai->dai_ops.digital_mute)
- codec_dai->dai_ops.digital_mute(codec_dai, 0);
- }
- } else {
- /* no delayed work - do we need to power up codec */
- if (codec->dapm_state != SNDRV_CTL_POWER_D0) {
- snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D1);
- 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);
- snd_soc_dapm_device_event(socdev, SNDRV_CTL_POWER_D0);
- if (codec_dai->dai_ops.digital_mute)
- codec_dai->dai_ops.digital_mute(codec_dai, 0);
- } else {
- /* codec already powered - power on widgets */
- 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);
- if (codec_dai->dai_ops.digital_mute)
- codec_dai->dai_ops.digital_mute(codec_dai, 0);
- }
- }
- 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;
- struct snd_soc_dai_link *machine = rtd->dai;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
- struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
- int ret = 0;
- mutex_lock(&pcm_mutex);
- 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");
- goto out;
- }
- }
- if (codec_dai->ops.hw_params) {
- ret = codec_dai->ops.hw_params(substream, params);
- if (ret < 0) {
- printk(KERN_ERR "asoc: can't set codec %s hw params\n",
- codec_dai->name);
- goto codec_err;
- }
- }
- if (cpu_dai->ops.hw_params) {
- ret = cpu_dai->ops.hw_params(substream, params);
- if (ret < 0) {
- printk(KERN_ERR "asoc: can't set interface %s hw params\n",
- cpu_dai->name);
- goto interface_err;
- }
- }
- if (platform->pcm_ops->hw_params) {
- ret = platform->pcm_ops->hw_params(substream, params);
- if (ret < 0) {
- printk(KERN_ERR "asoc: can't set platform %s hw params\n",
- platform->name);
- goto platform_err;
- }
- }
- out:
- mutex_unlock(&pcm_mutex);
- return ret;
- platform_err:
- if (cpu_dai->ops.hw_free)
- cpu_dai->ops.hw_free(substream);
- interface_err:
- if (codec_dai->ops.hw_free)
- codec_dai->ops.hw_free(substream);
- codec_err:
- if(machine->ops && machine->ops->hw_free)
- machine->ops->hw_free(substream);
- 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;
- struct snd_soc_dai_link *machine = rtd->dai;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
- struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
- struct snd_soc_codec *codec = socdev->codec;
- mutex_lock(&pcm_mutex);
- /* apply codec digital mute */
- if (!codec->active && codec_dai->dai_ops.digital_mute)
- codec_dai->dai_ops.digital_mute(codec_dai, 1);
- /* 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 */
- if (codec_dai->ops.hw_free)
- codec_dai->ops.hw_free(substream);
- if (cpu_dai->ops.hw_free)
- cpu_dai->ops.hw_free(substream);
- 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;
- struct snd_soc_dai_link *machine = rtd->dai;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_cpu_dai *cpu_dai = machine->cpu_dai;
- struct snd_soc_codec_dai *codec_dai = machine->codec_dai;
- int ret;
- if (codec_dai->ops.trigger) {
- ret = codec_dai->ops.trigger(substream, cmd);
- if (ret < 0)
- return ret;
- }
- if (platform->pcm_ops->trigger) {
- ret = platform->pcm_ops->trigger(substream, cmd);
- if (ret < 0)
- return ret;
- }
- if (cpu_dai->ops.trigger) {
- ret = cpu_dai->ops.trigger(substream, cmd);
- if (ret < 0)
- return ret;
- }
- return 0;
- }
- /* 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,
- };
- #ifdef CONFIG_PM
- /* powers down audio subsystem for suspend */
- static int soc_suspend(struct platform_device *pdev, pm_message_t state)
- {
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_machine *machine = socdev->machine;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
- struct snd_soc_codec *codec = socdev->codec;
- int i;
- /* mute any active DAC's */
- for(i = 0; i < machine->num_links; i++) {
- struct snd_soc_codec_dai *dai = machine->dai_link[i].codec_dai;
- if (dai->dai_ops.digital_mute && dai->playback.active)
- dai->dai_ops.digital_mute(dai, 1);
- }
- snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3cold);
-
- /* suspend all pcm's */
- for(i = 0; i < machine->num_links; i++)
- snd_pcm_suspend_all(machine->dai_link[i].pcm);
- if (machine->suspend_pre)
- machine->suspend_pre(pdev, state);
- for(i = 0; i < machine->num_links; i++) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->suspend && cpu_dai->type != SND_SOC_DAI_AC97)
- cpu_dai->suspend(pdev, cpu_dai);
- if (platform->suspend)
- platform->suspend(pdev, cpu_dai);
- }
- /* close any waiting streams and save state */
- run_delayed_work(&socdev->delayed_work);
- codec->suspend_dapm_state = codec->dapm_state;
- for(i = 0; i < codec->num_dai; i++) {
- char *stream = codec->dai[i].playback.stream_name;
- 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);
- }
- if (codec_dev->suspend)
- codec_dev->suspend(pdev, state);
- for(i = 0; i < machine->num_links; i++) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->suspend && cpu_dai->type == SND_SOC_DAI_AC97)
- cpu_dai->suspend(pdev, cpu_dai);
- }
- if (machine->suspend_post)
- machine->suspend_post(pdev, state);
- return 0;
- }
- /* powers up audio subsystem after a suspend */
- static int soc_resume(struct platform_device *pdev)
- {
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_machine *machine = socdev->machine;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
- struct snd_soc_codec *codec = socdev->codec;
- int i;
- if (machine->resume_pre)
- machine->resume_pre(pdev);
- for(i = 0; i < machine->num_links; i++) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->resume && cpu_dai->type == SND_SOC_DAI_AC97)
- cpu_dai->resume(pdev, cpu_dai);
- }
- if (codec_dev->resume)
- codec_dev->resume(pdev);
- for(i = 0; i < codec->num_dai; i++) {
- char* stream = codec->dai[i].playback.stream_name;
- 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);
- }
- /* unmute any active DAC's */
- for(i = 0; i < machine->num_links; i++) {
- struct snd_soc_codec_dai *dai = machine->dai_link[i].codec_dai;
- if (dai->dai_ops.digital_mute && dai->playback.active)
- dai->dai_ops.digital_mute(dai, 0);
- }
- for(i = 0; i < machine->num_links; i++) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->resume && cpu_dai->type != SND_SOC_DAI_AC97)
- cpu_dai->resume(pdev, cpu_dai);
- if (platform->resume)
- platform->resume(pdev, cpu_dai);
- }
- if (machine->resume_post)
- machine->resume_post(pdev);
- #ifndef CONFIG_SND_S3C_SOC
- snd_power_change_state(codec->card, SNDRV_CTL_POWER_D3hot);
- #else
- snd_power_change_state(codec->card, SNDRV_CTL_POWER_D0);
- #endif
- return 0;
- }
- #else
- #define soc_suspend NULL
- #define soc_resume NULL
- #endif
- /* probes a new socdev */
- static int soc_probe(struct platform_device *pdev)
- {
- int ret = 0, i;
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_machine *machine = socdev->machine;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
- if (machine->probe) {
- ret = machine->probe(pdev);
- if(ret < 0)
- return ret;
- }
- for (i = 0; i < machine->num_links; i++) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->probe) {
- ret = cpu_dai->probe(pdev);
- if(ret < 0)
- goto cpu_dai_err;
- }
- }
- if (codec_dev->probe) {
- ret = codec_dev->probe(pdev);
- if(ret < 0)
- goto cpu_dai_err;
- }
- if (platform->probe) {
- ret = platform->probe(pdev);
- if(ret < 0)
- goto platform_err;
- }
- /* DAPM stream work */
- INIT_DELAYED_WORK(&socdev->delayed_work, close_delayed_work);
- return 0;
- platform_err:
- if (codec_dev->remove)
- codec_dev->remove(pdev);
- cpu_dai_err:
- for (i--; i >= 0; i--) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->remove)
- cpu_dai->remove(pdev);
- }
- if (machine->remove)
- machine->remove(pdev);
- return ret;
- }
- /* removes a socdev */
- static int soc_remove(struct platform_device *pdev)
- {
- int i;
- struct snd_soc_device *socdev = platform_get_drvdata(pdev);
- struct snd_soc_machine *machine = socdev->machine;
- struct snd_soc_platform *platform = socdev->platform;
- struct snd_soc_codec_device *codec_dev = socdev->codec_dev;
- run_delayed_work(&socdev->delayed_work);
- if (platform->remove)
- platform->remove(pdev);
- if (codec_dev->remove)
- codec_dev->remove(pdev);
- for (i = 0; i < machine->num_links; i++) {
- struct snd_soc_cpu_dai *cpu_dai = machine->dai_link[i].cpu_dai;
- if (cpu_dai->remove)
- cpu_dai->remove(pdev);
- }
- if (machine->remove)
- machine->remove(pdev);
- return 0;
- }
- /* ASoC platform driver */
- static struct platform_driver soc_driver = {
- .driver = {
- .name = "soc-audio",
- },
- .probe = soc_probe,
- .remove = soc_remove,
- .suspend = soc_suspend,
- .resume = soc_resume,
- };
- /* create a new pcm */
- static int soc_new_pcm(struct snd_soc_device *socdev,
- struct snd_soc_dai_link *dai_link, int num)
- {
- struct snd_soc_codec *codec = socdev->codec;
- struct snd_soc_codec_dai *codec_dai = dai_link->codec_dai;
- struct snd_soc_cpu_dai *cpu_dai = dai_link->cpu_dai;
- 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;
- rtd->dai = dai_link;
- rtd->socdev = socdev;
- codec_dai->codec = socdev->codec;
- /* check client and interface hw capabilities */
- sprintf(new_name, "%s %s-%s-%d",dai_link->stream_name, codec_dai->name,
- get_dai_name(cpu_dai->type), num);
- 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) {
- printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
- kfree(rtd);
- return ret;
- }
- dai_link->pcm = pcm;
- pcm->private_data = rtd;
- soc_pcm_ops.mmap = socdev->platform->pcm_ops->mmap;
- soc_pcm_ops.pointer = socdev->platform->pcm_ops->pointer;
- soc_pcm_ops.ioctl = socdev->platform->pcm_ops->ioctl;
- soc_pcm_ops.copy = socdev->platform->pcm_ops->copy;
- soc_pcm_ops.silence = socdev->platform->pcm_ops->silence;
- soc_pcm_ops.ack = socdev->platform->pcm_ops->ack;
- soc_pcm_ops.page = socdev->platform->pcm_ops->page;
- if (playback)
- {
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
- }
- if (capture)
- {
- snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
- }
- ret = socdev->platform->pcm_new(codec->card, codec_dai, pcm);
- if (ret < 0) {
- printk(KERN_ERR "asoc: platform pcm constructor failed\n");
- kfree(rtd);
- return ret;
- }
- pcm->private_free = socdev->platform->pcm_free;
- printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
- cpu_dai->name);
- return ret;
- }
- /* codec register dump */
- static ssize_t codec_reg_show(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct snd_soc_device *devdata = dev_get_drvdata(dev);
- struct snd_soc_codec *codec = devdata->codec;
- 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)
- count += sprintf(buf + count, "%2x: %4x\n", i, codec->read(codec, i));
- return count;
- }
- static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
- /**
- * 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;
- 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,
- unsigned short mask, unsigned short value)
- {
- int change;
- unsigned short old, new;
- mutex_lock(&io_mutex);
- old = snd_soc_read(codec, reg);
- new = (old & ~mask) | value;
- change = old != new;
- if (change)
- snd_soc_write(codec, reg, new);
- mutex_unlock(&io_mutex);
- return change;
- }
- EXPORT_SYMBOL_GPL(snd_soc_update_bits);
- /**
- * 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,
- unsigned short mask, unsigned short value)
- {
- int change;
- unsigned short old, new;
- mutex_lock(&io_mutex);
- old = snd_soc_read(codec, reg);
- new = (old & ~mask) | value;
- change = old != new;
- mutex_unlock(&io_mutex);
- return change;
- }
- EXPORT_SYMBOL_GPL(snd_soc_test_bits);
- /**
- * snd_soc_new_pcms - create new sound card and pcms
- * @socdev: the SoC audio device
- *
- * Create a new sound card based upon the codec and interface pcms.
- *
- * Returns 0 for success, else error.
- */
- int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid)
- {
- struct snd_soc_codec *codec = socdev->codec;
- struct snd_soc_machine *machine = socdev->machine;
- int ret = 0, i;
- mutex_lock(&codec->mutex);
- /* register a sound card */
- codec->card = snd_card_new(idx, xid, codec->owner, 0);
- if (!codec->card) {
- printk(KERN_ERR "asoc: can't create sound card for codec %s\n",
- codec->name);
- mutex_unlock(&codec->mutex);
- return -ENODEV;
- }
- codec->card->dev = socdev->dev;
- codec->card->private_data = codec;
- strncpy(codec->card->driver, codec->name, sizeof(codec->card->driver));
- /* create the pcms */
- for(i = 0; i < machine->num_links; i++) {
- ret = soc_new_pcm(socdev, &machine->dai_link[i], i);
- if (ret < 0) {
- printk(KERN_ERR "asoc: can't create pcm %s\n",
- machine->dai_link[i].stream_name);
- mutex_unlock(&codec->mutex);
- return ret;
- }
- }
- mutex_unlock(&codec->mutex);
- return ret;
- }
- EXPORT_SYMBOL_GPL(snd_soc_new_pcms);
- /**
- * snd_soc_register_card - register sound card
- * @socdev: the SoC audio device
- *
- * Register a SoC sound card. Also registers an AC97 device if the
- * codec is AC97 for ad hoc devices.
- *
- * Returns 0 for success, else error.
- */
- int snd_soc_register_card(struct snd_soc_device *socdev)
- {
- struct snd_soc_codec *codec = socdev->codec;
- struct snd_soc_machine *machine = socdev->machine;
- int ret = 0, i, ac97 = 0, err = 0;
- mutex_lock(&codec->mutex);
- for(i = 0; i < machine->num_links; i++) {
- if (socdev->machine->dai_link[i].init) {
- err = socdev->machine->dai_link[i].init(codec);
- if (err < 0) {
- printk(KERN_ERR "asoc: failed to init %s\n",
- socdev->machine->dai_link[i].stream_name);
- continue;
- }
- }
- if (socdev->machine->dai_link[i].codec_dai->type ==
- SND_SOC_DAI_AC97_BUS)
- ac97 = 1;
- }
- snprintf(codec->card->shortname, sizeof(codec->card->shortname),
- "%s", machine->name);
- snprintf(codec->card->longname, sizeof(codec->card->longname),
- "%s (%s)", machine->name, codec->name);
- ret = snd_card_register(codec->card);
- if (ret < 0) {
- printk(KERN_ERR "asoc: failed to register soundcard for codec %s\n",
- codec->name);
- goto out;
- }
- #ifdef CONFIG_SND_SOC_AC97_BUS
- if (ac97) {
- ret = soc_ac97_dev_register(codec);
- if (ret < 0) {
- printk(KERN_ERR "asoc: AC97 device register failed\n");
- snd_card_free(codec->card);
- goto out;
- }
- }
- #endif
- err = snd_soc_dapm_sys_add(socdev->dev);
- if (err < 0)
- printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
- err = device_create_file(socdev->dev, &dev_attr_codec_reg);
- if (err < 0)
- printk(KERN_WARNING "asoc: failed to add codec sysfs entries\n");
- out:
- mutex_unlock(&codec->mutex);
- return ret;
- }
- EXPORT_SYMBOL_GPL(snd_soc_register_card);
- /**
- * 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)
- {
- struct snd_soc_codec *codec = socdev->codec;
- #ifdef CONFIG_SND_SOC_AC97_BUS
- struct snd_soc_codec_dai *codec_dai;
- int i;
- #endif
- mutex_lock(&codec->mutex);
- #ifdef CONFIG_SND_SOC_AC97_BUS
- for(i = 0; i < codec->num_dai; i++) {
- codec_dai = &codec->dai[i];
- if (codec_dai->type == SND_SOC_DAI_AC97_BUS && codec->ac97) {
- soc_ac97_dev_unregister(codec);
- goto free_card;
- }
- }
- free_card:
- #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
- * @lnng_name: control long name
- *
- * 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);
- /**
- * 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;
- uinfo->value.enumerated.items = e->mask;
- if (uinfo->value.enumerated.item > e->mask - 1)
- uinfo->value.enumerated.item = e->mask - 1;
- 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
- * @uinfo: control element information
- *
- * 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;
- unsigned short val, bitmask;
- for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
- ;
- val = snd_soc_read(codec, e->reg);
- ucontrol->value.enumerated.item[0] = (val >> e->shift_l) & (bitmask - 1);
- 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
- * @uinfo: control element information
- *
- * 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;
- unsigned short val;
- unsigned short mask, bitmask;
- for (bitmask = 1; bitmask < e->mask; bitmask <<= 1)
- ;
- if (ucontrol->value.enumerated.item[0] > e->mask - 1)
- return -EINVAL;
- val = ucontrol->value.enumerated.item[0] << e->shift_l;
- mask = (bitmask - 1) << e->shift_l;
- if (e->shift_l != e->shift_r) {
- if (ucontrol->value.enumerated.item[1] > e->mask - 1)
- return -EINVAL;
- val |= ucontrol->value.enumerated.item[1] << e->shift_r;
- mask |= (bitmask - 1) << e->shift_r;
- }
- return snd_soc_update_bits(codec, e->reg, mask, val);
- }
- EXPORT_SYMBOL_GPL(snd_soc_put_enum_double);
- /**
- * 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;
- uinfo->value.enumerated.items = e->mask;
- if (uinfo->value.enumerated.item > e->mask - 1)
- uinfo->value.enumerated.item = e->mask - 1;
- 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)
- {
- int max = kcontrol->private_value;
- uinfo->type =
- max == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = 1;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = max;
- return 0;
- }
- EXPORT_SYMBOL_GPL(snd_soc_info_volsw_ext);
- /**
- * snd_soc_info_bool_ext - external single boolean mixer info callback
- * @kcontrol: mixer control
- * @uinfo: control element information
- *
- * Callback to provide information about a single boolean external mixer control.
- *
- * Returns 0 for success.
- */
- int snd_soc_info_bool_ext(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
- {
- uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
- uinfo->count = 1;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = 1;
- return 0;
- }
- EXPORT_SYMBOL_GPL(snd_soc_info_bool_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)
- {
- int max = (kcontrol->private_value >> 16) & 0xff;
- int shift = (kcontrol->private_value >> 8) & 0x0f;
- int rshift = (kcontrol->private_value >> 12) & 0x0f;
- uinfo->type =
- max == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = shift == rshift ? 1 : 2;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = max;
- return 0;
- }
- EXPORT_SYMBOL_GPL(snd_soc_info_volsw);
- /**
- * snd_soc_get_volsw - single mixer get callback
- * @kcontrol: mixer control
- * @uinfo: control element information
- *
- * 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)
- {
- struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- int reg = kcontrol->private_value & 0xff;
- int shift = (kcontrol->private_value >> 8) & 0x0f;
- int rshift = (kcontrol->private_value >> 12) & 0x0f;
- int max = (kcontrol->private_value >> 16) & 0xff;
- int mask = (1 << fls(max)) - 1;
- int invert = (kcontrol->private_value >> 24) & 0x01;
- 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] =
- max - ucontrol->value.integer.value[0];
- if (shift != rshift)
- ucontrol->value.integer.value[1] =
- max - ucontrol->value.integer.value[1];
- }
- return 0;
- }
- EXPORT_SYMBOL_GPL(snd_soc_get_volsw);
- /**
- * snd_soc_put_volsw - single mixer put callback
- * @kcontrol: mixer control
- * @uinfo: control element information
- *
- * 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)
- {
- struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- int reg = kcontrol->private_value & 0xff;
- int shift = (kcontrol->private_value >> 8) & 0x0f;
- int rshift = (kcontrol->private_value >> 12) & 0x0f;
- int max = (kcontrol->private_value >> 16) & 0xff;
- int mask = (1 << fls(max)) - 1;
- int invert = (kcontrol->private_value >> 24) & 0x01;
- unsigned short val, val2, val_mask;
- val = (ucontrol->value.integer.value[0] & mask);
- if (invert)
- val = max - val;
- val_mask = mask << shift;
- val = val << shift;
- if (shift != rshift) {
- val2 = (ucontrol->value.integer.value[1] & mask);
- if (invert)
- val2 = max - val2;
- val_mask |= mask << rshift;
- val |= val2 << rshift;
- }
- return snd_soc_update_bits(codec, reg, val_mask, val);
- }
- 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)
- {
- int max = (kcontrol->private_value >> 12) & 0xff;
- uinfo->type =
- max == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
- uinfo->count = 2;
- uinfo->value.integer.min = 0;
- uinfo->value.integer.max = max;
- return 0;
- }
- EXPORT_SYMBOL_GPL(snd_soc_info_volsw_2r);
- /**
- * snd_soc_get_volsw_2r - double mixer get callback
- * @kcontrol: mixer control
- * @uinfo: control element information
- *
- * 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)
- {
- struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- int reg = kcontrol->private_value & 0xff;
- int reg2 = (kcontrol->private_value >> 24) & 0xff;
- int shift = (kcontrol->private_value >> 8) & 0x0f;
- int max = (kcontrol->private_value >> 12) & 0xff;
- int mask = (1<<fls(max))-1;
- int invert = (kcontrol->private_value >> 20) & 0x01;
- 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] =
- max - ucontrol->value.integer.value[0];
- ucontrol->value.integer.value[1] =
- max - ucontrol->value.integer.value[1];
- }
- return 0;
- }
- EXPORT_SYMBOL_GPL(snd_soc_get_volsw_2r);
- /**
- * snd_soc_put_volsw_2r - double mixer set callback
- * @kcontrol: mixer control
- * @uinfo: control element information
- *
- * 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)
- {
- struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
- int reg = kcontrol->private_value & 0xff;
- int reg2 = (kcontrol->private_value >> 24) & 0xff;
- int shift = (kcontrol->private_value >> 8) & 0x0f;
- int max = (kcontrol->private_value >> 12) & 0xff;
- int mask = (1 << fls(max)) - 1;
- int invert = (kcontrol->private_value >> 20) & 0x01;
- int err;
- unsigned short val, val2, val_mask;
- val_mask = mask << shift;
- val = (ucontrol->value.integer.value[0] & mask);
- val2 = (ucontrol->value.integer.value[1] & mask);
- if (invert) {
- val = max - val;
- val2 = max - val2;
- }
- val = val << shift;
- val2 = val2 << shift;
- if ((err = snd_soc_update_bits(codec, reg, val_mask, val)) < 0)
- return err;
- err = snd_soc_update_bits(codec, reg2, val_mask, val2);
- return err;
- }
- EXPORT_SYMBOL_GPL(snd_soc_put_volsw_2r);
- static int __devinit snd_soc_init(void)
- {
- printk(KERN_INFO "ASoC version %s\n", SND_SOC_VERSION);
- return platform_driver_register(&soc_driver);
- }
- static void snd_soc_exit(void)
- {
- platform_driver_unregister(&soc_driver);
- }
- module_init(snd_soc_init);
- module_exit(snd_soc_exit);
- /* Module information */
- MODULE_AUTHOR("Liam Girdwood, liam.girdwood@wolfsonmicro.com, www.wolfsonmicro.com");
- MODULE_DESCRIPTION("ALSA SoC Core");
- MODULE_LICENSE("GPL");
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