--- /dev/null
+/*
+ * soc-core.c -- ALSA SoC Audio Layer
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Author: Liam Girdwood
+ * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.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
+/* debug DAI capabilities matching */
+#define SOC_DEBUG_DAI 0
+#if SOC_DEBUG_DAI
+#define dbgc(format, arg...) printk(format, ## arg)
+#else
+#define dbgc(format, arg...)
+#endif
+
+static DEFINE_MUTEX(pcm_mutex);
+static DEFINE_MUTEX(io_mutex);
+static struct workqueue_struct *soc_workq;
+static struct work_struct soc_stream_work;
+static DECLARE_WAIT_QUEUE_HEAD(soc_pm_waitq);
+
+/* supported sample rates */
+/* ATTENTION: these values depend on the definition in pcm.h! */
+static const unsigned int rates[] = {
+ 5512, 8000, 11025, 16000, 22050, 32000, 44100,
+ 48000, 64000, 88200, 96000, 176400, 192000
+};
+
+/*
+ * 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)");
+
+#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:
+ return "AC97";
+ case SND_SOC_DAI_I2S:
+ return "I2S";
+ case SND_SOC_DAI_PCM:
+ return "PCM";
+ }
+ return NULL;
+}
+
+/* get rate format from rate */
+static inline int soc_get_rate_format(int rate)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(rates); i++) {
+ if (rates[i] == rate)
+ return 1 << i;
+ }
+ return 0;
+}
+
+/* gets the audio system mclk/sysclk for the given parameters */
+static unsigned inline int soc_get_mclk(struct snd_soc_pcm_runtime *rtd,
+ struct snd_soc_clock_info *info)
+{
+ struct snd_soc_device *socdev = rtd->socdev;
+ struct snd_soc_machine *machine = socdev->machine;
+ int i;
+
+ /* find the matching machine config and get it's mclk for the given
+ * sample rate and hardware format */
+ for(i = 0; i < machine->num_links; i++) {
+ if (machine->dai_link[i].cpu_dai == rtd->cpu_dai &&
+ machine->dai_link[i].config_sysclk)
+ return machine->dai_link[i].config_sysclk(rtd, info);
+ }
+ return 0;
+}
+
+/* changes a bitclk multiplier mask to a divider mask */
+static u16 soc_bfs_mult_to_div(u16 bfs, int rate, unsigned int mclk,
+ unsigned int pcmfmt, unsigned int chn)
+{
+ int i, j;
+ u16 bfs_ = 0;
+ int size = snd_pcm_format_physical_width(pcmfmt), min = 0;
+
+ if (size <= 0)
+ return 0;
+
+ /* the minimum bit clock that has enough bandwidth */
+ min = size * rate * chn;
+ dbgc("mult --> div min bclk %d with mclk %d\n", min, mclk);
+
+ for (i = 0; i < 16; i++) {
+ if ((bfs >> i) & 0x1) {
+ j = rate * SND_SOC_FSB_REAL(1<<i);
+
+ if (j >= min) {
+ bfs_ |= SND_SOC_FSBD(mclk/j);
+ dbgc("mult --> div support mult %d\n",
+ SND_SOC_FSB_REAL(1<<i));
+ }
+ }
+ }
+
+ return bfs_;
+}
+
+/* changes a bitclk divider mask to a multiplier mask */
+static u16 soc_bfs_div_to_mult(u16 bfs, int rate, unsigned int mclk,
+ unsigned int pcmfmt, unsigned int chn)
+{
+ int i, j;
+ u16 bfs_ = 0;
+
+ int size = snd_pcm_format_physical_width(pcmfmt), min = 0;
+
+ if (size <= 0)
+ return 0;
+
+ /* the minimum bit clock that has enough bandwidth */
+ min = size * rate * chn;
+ dbgc("div to mult min bclk %d with mclk %d\n", min, mclk);
+
+ for (i = 0; i < 16; i++) {
+ if ((bfs >> i) & 0x1) {
+ j = mclk / (SND_SOC_FSBD_REAL(1<<i));
+ if (j >= min) {
+ bfs_ |= SND_SOC_FSB(j/rate);
+ dbgc("div --> mult support div %d\n",
+ SND_SOC_FSBD_REAL(1<<i));
+ }
+ }
+ }
+
+ return bfs_;
+}
+
+/* Matches codec DAI and SoC CPU DAI hardware parameters */
+static int soc_hw_match_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai_mode *codec_dai_mode = NULL;
+ struct snd_soc_dai_mode *cpu_dai_mode = NULL;
+ struct snd_soc_clock_info clk_info;
+ unsigned int fs, mclk, codec_bfs, cpu_bfs, rate = params_rate(params),
+ chn, j, k, cpu_bclk, codec_bclk, pcmrate;
+ u16 fmt = 0;
+
+ dbg("asoc: match version %s\n", SND_SOC_VERSION);
+ clk_info.rate = rate;
+ pcmrate = soc_get_rate_format(rate);
+
+ /* try and find a match from the codec and cpu DAI capabilities */
+ for (j = 0; j < rtd->codec_dai->caps.num_modes; j++) {
+ for (k = 0; k < rtd->cpu_dai->caps.num_modes; k++) {
+ codec_dai_mode = &rtd->codec_dai->caps.mode[j];
+ cpu_dai_mode = &rtd->cpu_dai->caps.mode[k];
+
+ if (!(codec_dai_mode->pcmrate & cpu_dai_mode->pcmrate &
+ pcmrate)) {
+ dbgc("asoc: DAI[%d:%d] failed to match rate\n", j, k);
+ continue;
+ }
+
+ fmt = codec_dai_mode->fmt & cpu_dai_mode->fmt;
+ if (!(fmt & SND_SOC_DAIFMT_FORMAT_MASK)) {
+ dbgc("asoc: DAI[%d:%d] failed to match format\n", j, k);
+ continue;
+ }
+
+ if (!(fmt & SND_SOC_DAIFMT_CLOCK_MASK)) {
+ dbgc("asoc: DAI[%d:%d] failed to match clock masters\n",
+ j, k);
+ continue;
+ }
+
+ if (!(fmt & SND_SOC_DAIFMT_INV_MASK)) {
+ dbgc("asoc: DAI[%d:%d] failed to match invert\n", j, k);
+ continue;
+ }
+
+ if (!(codec_dai_mode->pcmfmt & cpu_dai_mode->pcmfmt)) {
+ dbgc("asoc: DAI[%d:%d] failed to match pcm format\n", j, k);
+ continue;
+ }
+
+ if (!(codec_dai_mode->pcmdir & cpu_dai_mode->pcmdir)) {
+ dbgc("asoc: DAI[%d:%d] failed to match direction\n", j, k);
+ continue;
+ }
+
+ /* todo - still need to add tdm selection */
+ rtd->cpu_dai->dai_runtime.fmt =
+ rtd->codec_dai->dai_runtime.fmt =
+ 1 << (ffs(fmt & SND_SOC_DAIFMT_FORMAT_MASK) -1) |
+ 1 << (ffs(fmt & SND_SOC_DAIFMT_CLOCK_MASK) - 1) |
+ 1 << (ffs(fmt & SND_SOC_DAIFMT_INV_MASK) - 1);
+ clk_info.bclk_master =
+ rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK;
+
+ /* make sure the ratio between rate and master
+ * clock is acceptable*/
+ fs = (cpu_dai_mode->fs & codec_dai_mode->fs);
+ if (fs == 0) {
+ dbgc("asoc: DAI[%d:%d] failed to match FS\n", j, k);
+ continue;
+ }
+ clk_info.fs = rtd->cpu_dai->dai_runtime.fs =
+ rtd->codec_dai->dai_runtime.fs = fs;
+
+ /* calculate audio system clocking using slowest clocks possible*/
+ mclk = soc_get_mclk(rtd, &clk_info);
+ if (mclk == 0) {
+ dbgc("asoc: DAI[%d:%d] configuration not clockable\n", j, k);
+ dbgc("asoc: rate %d fs %d master %x\n", rate, fs,
+ clk_info.bclk_master);
+ continue;
+ }
+
+ /* calculate word size (per channel) and frame size */
+ rtd->codec_dai->dai_runtime.pcmfmt =
+ rtd->cpu_dai->dai_runtime.pcmfmt =
+ 1 << params_format(params);
+
+ chn = params_channels(params);
+ /* i2s always has left and right */
+ if (params_channels(params) == 1 &&
+ rtd->cpu_dai->dai_runtime.fmt & (SND_SOC_DAIFMT_I2S |
+ SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_LEFT_J))
+ chn <<= 1;
+
+ /* Calculate bfs - the ratio between bitclock and the sample rate
+ * We must take into consideration the dividers and multipliers
+ * used in the codec and cpu DAI modes. We always choose the
+ * lowest possible clocks to reduce power.
+ */
+ if (codec_dai_mode->flags & cpu_dai_mode->flags &
+ SND_SOC_DAI_BFS_DIV) {
+ /* cpu & codec bfs dividers */
+ rtd->cpu_dai->dai_runtime.bfs =
+ rtd->codec_dai->dai_runtime.bfs =
+ 1 << (fls(codec_dai_mode->bfs & cpu_dai_mode->bfs) - 1);
+ } else if (codec_dai_mode->flags & SND_SOC_DAI_BFS_DIV) {
+ /* normalise bfs codec divider & cpu mult */
+ codec_bfs = soc_bfs_div_to_mult(codec_dai_mode->bfs, rate,
+ mclk, rtd->codec_dai->dai_runtime.pcmfmt, chn);
+ rtd->cpu_dai->dai_runtime.bfs =
+ 1 << (ffs(codec_bfs & cpu_dai_mode->bfs) - 1);
+ cpu_bfs = soc_bfs_mult_to_div(cpu_dai_mode->bfs, rate, mclk,
+ rtd->codec_dai->dai_runtime.pcmfmt, chn);
+ rtd->codec_dai->dai_runtime.bfs =
+ 1 << (fls(codec_dai_mode->bfs & cpu_bfs) - 1);
+ } else if (cpu_dai_mode->flags & SND_SOC_DAI_BFS_DIV) {
+ /* normalise bfs codec mult & cpu divider */
+ codec_bfs = soc_bfs_mult_to_div(codec_dai_mode->bfs, rate,
+ mclk, rtd->codec_dai->dai_runtime.pcmfmt, chn);
+ rtd->cpu_dai->dai_runtime.bfs =
+ 1 << (fls(codec_bfs & cpu_dai_mode->bfs) -1);
+ cpu_bfs = soc_bfs_div_to_mult(cpu_dai_mode->bfs, rate, mclk,
+ rtd->codec_dai->dai_runtime.pcmfmt, chn);
+ rtd->codec_dai->dai_runtime.bfs =
+ 1 << (ffs(codec_dai_mode->bfs & cpu_bfs) -1);
+ } else {
+ /* codec & cpu bfs rate multipliers */
+ rtd->cpu_dai->dai_runtime.bfs =
+ rtd->codec_dai->dai_runtime.bfs =
+ 1 << (ffs(codec_dai_mode->bfs & cpu_dai_mode->bfs) -1);
+ }
+
+ /* make sure the bit clock speed is acceptable */
+ if (!rtd->cpu_dai->dai_runtime.bfs ||
+ !rtd->codec_dai->dai_runtime.bfs) {
+ dbgc("asoc: DAI[%d:%d] failed to match BFS\n", j, k);
+ dbgc("asoc: cpu_dai %x codec %x\n",
+ rtd->cpu_dai->dai_runtime.bfs,
+ rtd->codec_dai->dai_runtime.bfs);
+ dbgc("asoc: mclk %d hwfmt %x\n", mclk, fmt);
+ continue;
+ }
+
+ goto found;
+ }
+ }
+ printk(KERN_ERR "asoc: no matching DAI found between codec and CPU\n");
+ return -EINVAL;
+
+found:
+ /* we have matching DAI's, so complete the runtime info */
+ rtd->codec_dai->dai_runtime.pcmrate =
+ rtd->cpu_dai->dai_runtime.pcmrate =
+ soc_get_rate_format(rate);
+
+ rtd->codec_dai->dai_runtime.priv = codec_dai_mode->priv;
+ rtd->cpu_dai->dai_runtime.priv = cpu_dai_mode->priv;
+ rtd->codec_dai->dai_runtime.flags = codec_dai_mode->flags;
+ rtd->cpu_dai->dai_runtime.flags = cpu_dai_mode->flags;
+
+ /* for debug atm */
+ dbg("asoc: DAI[%d:%d] Match OK\n", j, k);
+ if (rtd->codec_dai->dai_runtime.flags == SND_SOC_DAI_BFS_DIV) {
+ codec_bclk = (rtd->codec_dai->dai_runtime.fs * params_rate(params)) /
+ SND_SOC_FSBD_REAL(rtd->codec_dai->dai_runtime.bfs);
+ dbg("asoc: codec fs %d mclk %d bfs div %d bclk %d\n",
+ rtd->codec_dai->dai_runtime.fs, mclk,
+ SND_SOC_FSBD_REAL(rtd->codec_dai->dai_runtime.bfs), codec_bclk);
+ } else {
+ codec_bclk = params_rate(params) *
+ SND_SOC_FSB_REAL(rtd->codec_dai->dai_runtime.bfs);
+ dbg("asoc: codec fs %d mclk %d bfs mult %d bclk %d\n",
+ rtd->codec_dai->dai_runtime.fs, mclk,
+ SND_SOC_FSB_REAL(rtd->codec_dai->dai_runtime.bfs), codec_bclk);
+ }
+ if (rtd->cpu_dai->dai_runtime.flags == SND_SOC_DAI_BFS_DIV) {
+ cpu_bclk = (rtd->cpu_dai->dai_runtime.fs * params_rate(params)) /
+ SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs);
+ dbg("asoc: cpu fs %d mclk %d bfs div %d bclk %d\n",
+ rtd->cpu_dai->dai_runtime.fs, mclk,
+ SND_SOC_FSBD_REAL(rtd->cpu_dai->dai_runtime.bfs), cpu_bclk);
+ } else {
+ cpu_bclk = params_rate(params) *
+ SND_SOC_FSB_REAL(rtd->cpu_dai->dai_runtime.bfs);
+ dbg("asoc: cpu fs %d mclk %d bfs mult %d bclk %d\n",
+ rtd->cpu_dai->dai_runtime.fs, mclk,
+ SND_SOC_FSB_REAL(rtd->cpu_dai->dai_runtime.bfs), cpu_bclk);
+ }
+
+ /*
+ * Check we have matching bitclocks. If we don't then it means the
+ * sysclock returned by either the codec or cpu DAI (selected by the
+ * machine sysclock function) is wrong compared with the supported DAI
+ * modes for the codec or cpu DAI.
+ */
+ if (cpu_bclk != codec_bclk){
+ printk(KERN_ERR
+ "asoc: codec and cpu bitclocks differ, audio may be wrong speed\n"
+ );
+ printk(KERN_ERR "asoc: codec %d != cpu %d\n", codec_bclk, cpu_bclk);
+ }
+
+ switch(rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_CLOCK_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ dbg("asoc: DAI codec BCLK master, LRC master\n");
+ break;
+ case SND_SOC_DAIFMT_CBS_CFM:
+ dbg("asoc: DAI codec BCLK slave, LRC master\n");
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ dbg("asoc: DAI codec BCLK master, LRC slave\n");
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ dbg("asoc: DAI codec BCLK slave, LRC slave\n");
+ break;
+ }
+ dbg("asoc: mode %x, invert %x\n",
+ rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_FORMAT_MASK,
+ rtd->cpu_dai->dai_runtime.fmt & SND_SOC_DAIFMT_INV_MASK);
+ dbg("asoc: audio rate %d chn %d fmt %x\n", params_rate(params),
+ params_channels(params), params_format(params));
+
+ return 0;
+}
+
+static inline u32 get_rates(struct snd_soc_dai_mode *modes, int nmodes)
+{
+ int i;
+ u32 rates = 0;
+
+ for(i = 0; i < nmodes; i++)
+ rates |= modes[i].pcmrate;
+
+ return rates;
+}
+
+static inline u64 get_formats(struct snd_soc_dai_mode *modes, int nmodes)
+{
+ int i;
+ u64 formats = 0;
+
+ for(i = 0; i < nmodes; i++)
+ formats |= modes[i].pcmfmt;
+
+ return formats;
+}
+
+/*
+ * 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_machine *machine = socdev->machine;
+ struct snd_soc_platform *platform = socdev->platform;
+ struct snd_soc_codec_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_cpu_dai *cpu_dai = rtd->cpu_dai;
+ int ret = 0;
+
+ mutex_lock(&pcm_mutex);
+
+ /* startup the audio subsystem */
+ if (rtd->cpu_dai->ops.startup) {
+ ret = rtd->cpu_dai->ops.startup(substream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't open interface %s\n",
+ rtd->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 (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;
+ }
+ }
+
+ if (rtd->codec_dai->ops.startup) {
+ ret = rtd->codec_dai->ops.startup(substream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't open codec %s\n",
+ rtd->codec_dai->name);
+ goto codec_dai_err;
+ }
+ }
+
+ /* create runtime params from DMA, codec and cpu DAI */
+ if (runtime->hw.rates)
+ runtime->hw.rates &=
+ get_rates(codec_dai->caps.mode, codec_dai->caps.num_modes) &
+ get_rates(cpu_dai->caps.mode, cpu_dai->caps.num_modes);
+ else
+ runtime->hw.rates =
+ get_rates(codec_dai->caps.mode, codec_dai->caps.num_modes) &
+ get_rates(cpu_dai->caps.mode, cpu_dai->caps.num_modes);
+ if (runtime->hw.formats)
+ runtime->hw.formats &=
+ get_formats(codec_dai->caps.mode, codec_dai->caps.num_modes) &
+ get_formats(cpu_dai->caps.mode, cpu_dai->caps.num_modes);
+ else
+ runtime->hw.formats =
+ get_formats(codec_dai->caps.mode, codec_dai->caps.num_modes) &
+ get_formats(cpu_dai->caps.mode, cpu_dai->caps.num_modes);
+
+ /* Check that the codec and cpu DAI's are compatible */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ runtime->hw.rate_min =
+ max(rtd->codec_dai->playback.rate_min,
+ rtd->cpu_dai->playback.rate_min);
+ runtime->hw.rate_max =
+ min(rtd->codec_dai->playback.rate_max,
+ rtd->cpu_dai->playback.rate_max);
+ runtime->hw.channels_min =
+ max(rtd->codec_dai->playback.channels_min,
+ rtd->cpu_dai->playback.channels_min);
+ runtime->hw.channels_max =
+ min(rtd->codec_dai->playback.channels_max,
+ rtd->cpu_dai->playback.channels_max);
+ } else {
+ runtime->hw.rate_min =
+ max(rtd->codec_dai->capture.rate_min,
+ rtd->cpu_dai->capture.rate_min);
+ runtime->hw.rate_max =
+ min(rtd->codec_dai->capture.rate_max,
+ rtd->cpu_dai->capture.rate_max);
+ runtime->hw.channels_min =
+ max(rtd->codec_dai->capture.channels_min,
+ rtd->cpu_dai->capture.channels_min);
+ runtime->hw.channels_max =
+ min(rtd->codec_dai->capture.channels_max,
+ rtd->cpu_dai->capture.channels_max);
+ }
+
+ snd_pcm_limit_hw_rates(runtime);
+ if (!runtime->hw.rates) {
+ printk(KERN_ERR "asoc: %s <-> %s No matching rates\n",
+ rtd->codec_dai->name, rtd->cpu_dai->name);
+ goto codec_dai_err;
+ }
+ if (!runtime->hw.formats) {
+ printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
+ rtd->codec_dai->name, rtd->cpu_dai->name);
+ goto codec_dai_err;
+ }
+ if (!runtime->hw.channels_min || !runtime->hw.channels_max) {
+ printk(KERN_ERR "asoc: %s <-> %s No matching channels\n",
+ rtd->codec_dai->name, rtd->cpu_dai->name);
+ goto codec_dai_err;
+ }
+
+ dbg("asoc: %s <-> %s info:\n", rtd->codec_dai->name, rtd->cpu_dai->name);
+ dbg("asoc: rate mask 0x%x \nasoc: min ch %d max ch %d\n
+ asoc: min rate %d max rate %d\n",
+ runtime->hw.rates, runtime->hw.channels_min,
+ runtime->hw.channels_max, runtime->hw.rate_min, runtime->hw.rate_max);
+
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ rtd->cpu_dai->playback.active = rtd->codec_dai->playback.active = 1;
+ else
+ rtd->cpu_dai->capture.active = rtd->codec_dai->capture.active = 1;
+ rtd->cpu_dai->active = rtd->codec_dai->active = 1;
+ rtd->cpu_dai->runtime = runtime;
+ socdev->codec->active++;
+ mutex_unlock(&pcm_mutex);
+ return 0;
+
+codec_dai_err:
+ if (machine->ops && machine->ops->shutdown)
+ machine->ops->shutdown(substream);
+
+machine_err:
+ if (platform->pcm_ops->close)
+ platform->pcm_ops->close(substream);
+
+platform_err:
+ if (rtd->cpu_dai->ops.shutdown)
+ rtd->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(void *data)
+{
+ struct snd_soc_device *socdev = data;
+ 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) {
+
+ 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);
+ if (codec->dapm_event)
+ codec->dapm_event(codec, 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_machine *machine = socdev->machine;
+ struct snd_soc_platform *platform = socdev->platform;
+ struct snd_soc_codec *codec = socdev->codec;
+
+ mutex_lock(&pcm_mutex);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ rtd->cpu_dai->playback.active = rtd->codec_dai->playback.active = 0;
+ else
+ rtd->cpu_dai->capture.active = rtd->codec_dai->capture.active = 0;
+
+ if (rtd->codec_dai->playback.active == 0 &&
+ rtd->codec_dai->capture.active == 0) {
+ rtd->cpu_dai->active = rtd->codec_dai->active = 0;
+ }
+ codec->active--;
+
+ if (rtd->cpu_dai->ops.shutdown)
+ rtd->cpu_dai->ops.shutdown(substream);
+
+ if (rtd->codec_dai->ops.shutdown)
+ rtd->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);
+ rtd->cpu_dai->runtime = NULL;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* start delayed pop wq here for playback streams */
+ rtd->codec_dai->pop_wait = 1;
+ queue_delayed_work(soc_workq, &soc_stream_work,
+ msecs_to_jiffies(pmdown_time));
+ } else {
+ /* capture streams can be powered down now */
+ snd_soc_dapm_stream_event(codec, rtd->codec_dai->capture.stream_name,
+ SND_SOC_DAPM_STREAM_STOP);
+
+ if (codec->active == 0 && rtd->codec_dai->pop_wait == 0){
+ if (codec->dapm_event)
+ codec->dapm_event(codec, 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_platform *platform = socdev->platform;
+ struct snd_soc_codec *codec = socdev->codec;
+ int ret = 0;
+
+ mutex_lock(&pcm_mutex);
+ if (platform->pcm_ops->prepare) {
+ ret = platform->pcm_ops->prepare(substream);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (rtd->codec_dai->ops.prepare) {
+ ret = rtd->codec_dai->ops.prepare(substream);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (rtd->cpu_dai->ops.prepare)
+ ret = rtd->cpu_dai->ops.prepare(substream);
+
+ /* we only want to start a DAPM playback stream if we are not waiting
+ * on an existing one stopping */
+ if (rtd->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(codec,
+ rtd->codec_dai->capture.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+ else {
+ rtd->codec_dai->pop_wait = 0;
+ cancel_delayed_work(&soc_stream_work);
+ if (rtd->codec_dai->digital_mute)
+ rtd->codec_dai->digital_mute(codec, rtd->codec_dai, 0);
+ }
+ } else {
+ /* no delayed work - do we need to power up codec */
+ if (codec->dapm_state != SNDRV_CTL_POWER_D0) {
+
+ if (codec->dapm_event)
+ codec->dapm_event(codec, SNDRV_CTL_POWER_D1);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_dapm_stream_event(codec,
+ rtd->codec_dai->playback.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+ else
+ snd_soc_dapm_stream_event(codec,
+ rtd->codec_dai->capture.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+
+ if (codec->dapm_event)
+ codec->dapm_event(codec, SNDRV_CTL_POWER_D0);
+ if (rtd->codec_dai->digital_mute)
+ rtd->codec_dai->digital_mute(codec, rtd->codec_dai, 0);
+
+ } else {
+ /* codec already powered - power on widgets */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_dapm_stream_event(codec,
+ rtd->codec_dai->playback.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+ else
+ snd_soc_dapm_stream_event(codec,
+ rtd->codec_dai->capture.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+ if (rtd->codec_dai->digital_mute)
+ rtd->codec_dai->digital_mute(codec, rtd->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_platform *platform = socdev->platform;
+ struct snd_soc_machine *machine = socdev->machine;
+ int ret = 0;
+
+ mutex_lock(&pcm_mutex);
+
+ /* we don't need to match any AC97 params */
+ if (rtd->cpu_dai->type != SND_SOC_DAI_AC97) {
+ ret = soc_hw_match_params(substream, params);
+ if (ret < 0)
+ goto out;
+ } else {
+ struct snd_soc_clock_info clk_info;
+ clk_info.rate = params_rate(params);
+ ret = soc_get_mclk(rtd, &clk_info);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (rtd->codec_dai->ops.hw_params) {
+ ret = rtd->codec_dai->ops.hw_params(substream, params);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't set codec %s hw params\n",
+ rtd->codec_dai->name);
+ goto out;
+ }
+ }
+
+ if (rtd->cpu_dai->ops.hw_params) {
+ ret = rtd->cpu_dai->ops.hw_params(substream, params);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't set interface %s hw params\n",
+ rtd->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;
+ }
+ }
+
+ 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 machine_err;
+ }
+ }
+
+out:
+ mutex_unlock(&pcm_mutex);
+ return ret;
+
+machine_err:
+ if (platform->pcm_ops->hw_free)
+ platform->pcm_ops->hw_free(substream);
+
+platform_err:
+ if (rtd->cpu_dai->ops.hw_free)
+ rtd->cpu_dai->ops.hw_free(substream);
+
+interface_err:
+ if (rtd->codec_dai->ops.hw_free)
+ rtd->codec_dai->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_platform *platform = socdev->platform;
+ struct snd_soc_codec *codec = socdev->codec;
+ struct snd_soc_machine *machine = socdev->machine;
+
+ mutex_lock(&pcm_mutex);
+
+ /* apply codec digital mute */
+ if (!codec->active && rtd->codec_dai->digital_mute)
+ rtd->codec_dai->digital_mute(codec, rtd->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 (rtd->codec_dai->ops.hw_free)
+ rtd->codec_dai->ops.hw_free(substream);
+
+ if (rtd->cpu_dai->ops.hw_free)
+ rtd->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_platform *platform = socdev->platform;
+ int ret;
+
+ if (rtd->codec_dai->ops.trigger) {
+ ret = rtd->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 (rtd->cpu_dai->ops.trigger) {
+ ret = rtd->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->digital_mute && dai->playback.active)
+ dai->digital_mute(codec, dai, 1);
+ }
+
+ 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 */
+ flush_workqueue(soc_workq);
+ 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->digital_mute && dai->playback.active)
+ dai->digital_mute(codec, 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);
+
+ 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 */
+ soc_workq = create_workqueue("kdapm");
+ if (soc_workq == NULL)
+ goto work_err;
+ INIT_WORK(&soc_stream_work, close_delayed_work, socdev);
+ return 0;
+
+work_err:
+ if (platform->remove)
+ platform->remove(pdev);
+
+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;
+
+ if (soc_workq)
+ destroy_workqueue(soc_workq);
+
+ 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->cpu_dai = cpu_dai;
+ rtd->codec_dai = codec_dai;
+ rtd->socdev = socdev;
+
+ /* 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;
+ }
+
+ 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_get_rate - get int sample rate
+ * @hwpcmrate: the hardware pcm rate
+ *
+ * Returns the audio rate integaer value, else 0.
+ */
+int snd_soc_get_rate(int hwpcmrate)
+{
+ int rate = ffs(hwpcmrate) - 1;
+
+ if (rate > ARRAY_SIZE(rates))
+ return 0;
+ return rates[rate];
+}
+EXPORT_SYMBOL_GPL(snd_soc_get_rate);
+
+/**
+ * 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;
+
+ mutex_lock(&codec->mutex);
+ for(i = 0; i < machine->num_links; i++) {
+ if (socdev->machine->dai_link[i].init)
+ socdev->machine->dai_link[i].init(codec);
+ if (socdev->machine->dai_link[i].cpu_dai->type == SND_SOC_DAI_AC97)
+ 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);
+ mutex_unlock(&codec->mutex);
+ return ret;
+ }
+
+#ifdef CONFIG_SND_SOC_AC97_BUS
+ if (ac97)
+ soc_ac97_dev_register(codec);
+#endif
+
+ snd_soc_dapm_sys_add(socdev->dev);
+ device_create_file(socdev->dev, &dev_attr_codec_reg);
+ 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;
+
+ mutex_lock(&codec->mutex);
+#ifdef CONFIG_SND_SOC_AC97_BUS
+ if (codec->ac97)
+ soc_ac97_dev_unregister(codec);
+#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.access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
+ 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 mask = kcontrol->private_value;
+
+ uinfo->type =
+ mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = mask;
+ 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 mask = (kcontrol->private_value >> 16) & 0xff;
+ int shift = (kcontrol->private_value >> 8) & 0x0f;
+ int rshift = (kcontrol->private_value >> 12) & 0x0f;
+
+ uinfo->type =
+ mask == 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 = mask;
+ 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 mask = (kcontrol->private_value >> 16) & 0xff;
+ 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] =
+ mask - ucontrol->value.integer.value[0];
+ if (shift != rshift)
+ ucontrol->value.integer.value[1] =
+ mask - 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 mask = (kcontrol->private_value >> 16) & 0xff;
+ int invert = (kcontrol->private_value >> 24) & 0x01;
+ int err;
+ unsigned short val, val2, val_mask;
+
+ val = (ucontrol->value.integer.value[0] & mask);
+ if (invert)
+ val = mask - val;
+ val_mask = mask << shift;
+ val = val << shift;
+ if (shift != rshift) {
+ val2 = (ucontrol->value.integer.value[1] & mask);
+ if (invert)
+ val2 = mask - val2;
+ val_mask |= mask << rshift;
+ val |= val2 << rshift;
+ }
+ err = snd_soc_update_bits(codec, reg, val_mask, val);
+ return err;
+}
+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 mask = (kcontrol->private_value >> 12) & 0xff;
+
+ uinfo->type =
+ mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 2;
+ uinfo->value.integer.min = 0;
+ uinfo->value.integer.max = mask;
+ 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 mask = (kcontrol->private_value >> 12) & 0xff;
+ 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] =
+ mask - ucontrol->value.integer.value[0];
+ ucontrol->value.integer.value[1] =
+ mask - 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 mask = (kcontrol->private_value >> 12) & 0xff;
+ 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 = mask - val;
+ val2 = mask - 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");
projects / linux-2.6 / commitdiff