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-rw-r--r--sound/soc/soc-pcm.c639
1 files changed, 639 insertions, 0 deletions
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
new file mode 100644
index 000000000000..b5759397afa3
--- /dev/null
+++ b/sound/soc/soc-pcm.c
@@ -0,0 +1,639 @@
+/*
+ * soc-pcm.c -- ALSA SoC PCM
+ *
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ * Copyright (C) 2010 Slimlogic Ltd.
+ * Copyright (C) 2010 Texas Instruments Inc.
+ *
+ * Authors: Liam Girdwood <lrg@ti.com>
+ * Mark Brown <broonie@opensource.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.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+static DEFINE_MUTEX(pcm_mutex);
+
+static int soc_pcm_apply_symmetry(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret;
+
+ if (!codec_dai->driver->symmetric_rates &&
+ !cpu_dai->driver->symmetric_rates &&
+ !rtd->dai_link->symmetric_rates)
+ return 0;
+
+ /* This can happen if multiple streams are starting simultaneously -
+ * the second can need to get its constraints before the first has
+ * picked a rate. Complain and allow the application to carry on.
+ */
+ if (!rtd->rate) {
+ dev_warn(&rtd->dev,
+ "Not enforcing symmetric_rates due to race\n");
+ return 0;
+ }
+
+ dev_dbg(&rtd->dev, "Symmetry forces %dHz rate\n", rtd->rate);
+
+ ret = snd_pcm_hw_constraint_minmax(substream->runtime,
+ SNDRV_PCM_HW_PARAM_RATE,
+ rtd->rate, rtd->rate);
+ if (ret < 0) {
+ dev_err(&rtd->dev,
+ "Unable to apply rate symmetry constraint: %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * 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_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai_driver *cpu_dai_drv = cpu_dai->driver;
+ struct snd_soc_dai_driver *codec_dai_drv = codec_dai->driver;
+ int ret = 0;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ /* startup the audio subsystem */
+ if (cpu_dai->driver->ops->startup) {
+ ret = cpu_dai->driver->ops->startup(substream, cpu_dai);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't open interface %s\n",
+ cpu_dai->name);
+ goto out;
+ }
+ }
+
+ if (platform->driver->ops && platform->driver->ops->open) {
+ ret = platform->driver->ops->open(substream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't open platform %s\n", platform->name);
+ goto platform_err;
+ }
+ }
+
+ if (codec_dai->driver->ops->startup) {
+ ret = codec_dai->driver->ops->startup(substream, codec_dai);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't open codec %s\n",
+ codec_dai->name);
+ goto codec_dai_err;
+ }
+ }
+
+ if (rtd->dai_link->ops && rtd->dai_link->ops->startup) {
+ ret = rtd->dai_link->ops->startup(substream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: %s startup failed\n", rtd->dai_link->name);
+ goto machine_err;
+ }
+ }
+
+ /* Check that the codec and cpu DAIs are compatible */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ runtime->hw.rate_min =
+ max(codec_dai_drv->playback.rate_min,
+ cpu_dai_drv->playback.rate_min);
+ runtime->hw.rate_max =
+ min(codec_dai_drv->playback.rate_max,
+ cpu_dai_drv->playback.rate_max);
+ runtime->hw.channels_min =
+ max(codec_dai_drv->playback.channels_min,
+ cpu_dai_drv->playback.channels_min);
+ runtime->hw.channels_max =
+ min(codec_dai_drv->playback.channels_max,
+ cpu_dai_drv->playback.channels_max);
+ runtime->hw.formats =
+ codec_dai_drv->playback.formats & cpu_dai_drv->playback.formats;
+ runtime->hw.rates =
+ codec_dai_drv->playback.rates & cpu_dai_drv->playback.rates;
+ if (codec_dai_drv->playback.rates
+ & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
+ runtime->hw.rates |= cpu_dai_drv->playback.rates;
+ if (cpu_dai_drv->playback.rates
+ & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
+ runtime->hw.rates |= codec_dai_drv->playback.rates;
+ } else {
+ runtime->hw.rate_min =
+ max(codec_dai_drv->capture.rate_min,
+ cpu_dai_drv->capture.rate_min);
+ runtime->hw.rate_max =
+ min(codec_dai_drv->capture.rate_max,
+ cpu_dai_drv->capture.rate_max);
+ runtime->hw.channels_min =
+ max(codec_dai_drv->capture.channels_min,
+ cpu_dai_drv->capture.channels_min);
+ runtime->hw.channels_max =
+ min(codec_dai_drv->capture.channels_max,
+ cpu_dai_drv->capture.channels_max);
+ runtime->hw.formats =
+ codec_dai_drv->capture.formats & cpu_dai_drv->capture.formats;
+ runtime->hw.rates =
+ codec_dai_drv->capture.rates & cpu_dai_drv->capture.rates;
+ if (codec_dai_drv->capture.rates
+ & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
+ runtime->hw.rates |= cpu_dai_drv->capture.rates;
+ if (cpu_dai_drv->capture.rates
+ & (SNDRV_PCM_RATE_KNOT | SNDRV_PCM_RATE_CONTINUOUS))
+ runtime->hw.rates |= codec_dai_drv->capture.rates;
+ }
+
+ ret = -EINVAL;
+ 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 config_err;
+ }
+ if (!runtime->hw.formats) {
+ printk(KERN_ERR "asoc: %s <-> %s No matching formats\n",
+ codec_dai->name, cpu_dai->name);
+ goto config_err;
+ }
+ if (!runtime->hw.channels_min || !runtime->hw.channels_max ||
+ 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 config_err;
+ }
+
+ /* Symmetry only applies if we've already got an active stream. */
+ if (cpu_dai->active || codec_dai->active) {
+ ret = soc_pcm_apply_symmetry(substream);
+ if (ret != 0)
+ goto config_err;
+ }
+
+ pr_debug("asoc: %s <-> %s info:\n",
+ codec_dai->name, cpu_dai->name);
+ pr_debug("asoc: rate mask 0x%x\n", runtime->hw.rates);
+ pr_debug("asoc: min ch %d max ch %d\n", runtime->hw.channels_min,
+ runtime->hw.channels_max);
+ pr_debug("asoc: min rate %d max rate %d\n", runtime->hw.rate_min,
+ runtime->hw.rate_max);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ cpu_dai->playback_active++;
+ codec_dai->playback_active++;
+ } else {
+ cpu_dai->capture_active++;
+ codec_dai->capture_active++;
+ }
+ cpu_dai->active++;
+ codec_dai->active++;
+ rtd->codec->active++;
+ mutex_unlock(&rtd->pcm_mutex);
+ return 0;
+
+config_err:
+ if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
+ rtd->dai_link->ops->shutdown(substream);
+
+machine_err:
+ if (codec_dai->driver->ops->shutdown)
+ codec_dai->driver->ops->shutdown(substream, codec_dai);
+
+codec_dai_err:
+ if (platform->driver->ops && platform->driver->ops->close)
+ platform->driver->ops->close(substream);
+
+platform_err:
+ if (cpu_dai->driver->ops->shutdown)
+ cpu_dai->driver->ops->shutdown(substream, cpu_dai);
+out:
+ mutex_unlock(&rtd->pcm_mutex);
+ return ret;
+}
+
+/*
+ * Power down the audio subsystem 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_pcm_runtime *rtd =
+ container_of(work, struct snd_soc_pcm_runtime, delayed_work.work);
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ pr_debug("pop wq checking: %s status: %s waiting: %s\n",
+ codec_dai->driver->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(rtd,
+ codec_dai->driver->playback.stream_name,
+ SND_SOC_DAPM_STREAM_STOP);
+ }
+
+ mutex_unlock(&rtd->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_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = rtd->codec;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ cpu_dai->playback_active--;
+ codec_dai->playback_active--;
+ } else {
+ cpu_dai->capture_active--;
+ codec_dai->capture_active--;
+ }
+
+ cpu_dai->active--;
+ codec_dai->active--;
+ codec->active--;
+
+ /* Muting the DAC suppresses artifacts caused during digital
+ * shutdown, for example from stopping clocks.
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_dai_digital_mute(codec_dai, 1);
+
+ if (cpu_dai->driver->ops->shutdown)
+ cpu_dai->driver->ops->shutdown(substream, cpu_dai);
+
+ if (codec_dai->driver->ops->shutdown)
+ codec_dai->driver->ops->shutdown(substream, codec_dai);
+
+ if (rtd->dai_link->ops && rtd->dai_link->ops->shutdown)
+ rtd->dai_link->ops->shutdown(substream);
+
+ if (platform->driver->ops && platform->driver->ops->close)
+ platform->driver->ops->close(substream);
+ cpu_dai->runtime = NULL;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* start delayed pop wq here for playback streams */
+ codec_dai->pop_wait = 1;
+ schedule_delayed_work(&rtd->delayed_work,
+ msecs_to_jiffies(rtd->pmdown_time));
+ } else {
+ /* capture streams can be powered down now */
+ snd_soc_dapm_stream_event(rtd,
+ codec_dai->driver->capture.stream_name,
+ SND_SOC_DAPM_STREAM_STOP);
+ }
+
+ mutex_unlock(&rtd->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_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret = 0;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ if (rtd->dai_link->ops && rtd->dai_link->ops->prepare) {
+ ret = rtd->dai_link->ops->prepare(substream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: machine prepare error\n");
+ goto out;
+ }
+ }
+
+ if (platform->driver->ops && platform->driver->ops->prepare) {
+ ret = platform->driver->ops->prepare(substream);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: platform prepare error\n");
+ goto out;
+ }
+ }
+
+ if (codec_dai->driver->ops->prepare) {
+ ret = codec_dai->driver->ops->prepare(substream, codec_dai);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: codec DAI prepare error\n");
+ goto out;
+ }
+ }
+
+ if (cpu_dai->driver->ops->prepare) {
+ ret = cpu_dai->driver->ops->prepare(substream, cpu_dai);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: cpu DAI prepare error\n");
+ goto out;
+ }
+ }
+
+ /* cancel any delayed stream shutdown that is pending */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+ codec_dai->pop_wait) {
+ codec_dai->pop_wait = 0;
+ cancel_delayed_work(&rtd->delayed_work);
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ snd_soc_dapm_stream_event(rtd,
+ codec_dai->driver->playback.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+ else
+ snd_soc_dapm_stream_event(rtd,
+ codec_dai->driver->capture.stream_name,
+ SND_SOC_DAPM_STREAM_START);
+
+ snd_soc_dai_digital_mute(codec_dai, 0);
+
+out:
+ mutex_unlock(&rtd->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_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret = 0;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
+ ret = rtd->dai_link->ops->hw_params(substream, params);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: machine hw_params failed\n");
+ goto out;
+ }
+ }
+
+ if (codec_dai->driver->ops->hw_params) {
+ ret = codec_dai->driver->ops->hw_params(substream, params, codec_dai);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't set codec %s hw params\n",
+ codec_dai->name);
+ goto codec_err;
+ }
+ }
+
+ if (cpu_dai->driver->ops->hw_params) {
+ ret = cpu_dai->driver->ops->hw_params(substream, params, cpu_dai);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: interface %s hw params failed\n",
+ cpu_dai->name);
+ goto interface_err;
+ }
+ }
+
+ if (platform->driver->ops && platform->driver->ops->hw_params) {
+ ret = platform->driver->ops->hw_params(substream, params);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: platform %s hw params failed\n",
+ platform->name);
+ goto platform_err;
+ }
+ }
+
+ rtd->rate = params_rate(params);
+
+out:
+ mutex_unlock(&rtd->pcm_mutex);
+ return ret;
+
+platform_err:
+ if (cpu_dai->driver->ops->hw_free)
+ cpu_dai->driver->ops->hw_free(substream, cpu_dai);
+
+interface_err:
+ if (codec_dai->driver->ops->hw_free)
+ codec_dai->driver->ops->hw_free(substream, codec_dai);
+
+codec_err:
+ if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
+ rtd->dai_link->ops->hw_free(substream);
+
+ mutex_unlock(&rtd->pcm_mutex);
+ return ret;
+}
+
+/*
+ * Frees resources allocated by hw_params, can be called multiple times
+ */
+static int soc_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_codec *codec = rtd->codec;
+
+ mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
+
+ /* apply codec digital mute */
+ if (!codec->active)
+ snd_soc_dai_digital_mute(codec_dai, 1);
+
+ /* free any machine hw params */
+ if (rtd->dai_link->ops && rtd->dai_link->ops->hw_free)
+ rtd->dai_link->ops->hw_free(substream);
+
+ /* free any DMA resources */
+ if (platform->driver->ops && platform->driver->ops->hw_free)
+ platform->driver->ops->hw_free(substream);
+
+ /* now free hw params for the DAIs */
+ if (codec_dai->driver->ops->hw_free)
+ codec_dai->driver->ops->hw_free(substream, codec_dai);
+
+ if (cpu_dai->driver->ops->hw_free)
+ cpu_dai->driver->ops->hw_free(substream, cpu_dai);
+
+ mutex_unlock(&rtd->pcm_mutex);
+ return 0;
+}
+
+static int soc_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret;
+
+ if (codec_dai->driver->ops->trigger) {
+ ret = codec_dai->driver->ops->trigger(substream, cmd, codec_dai);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (platform->driver->ops && platform->driver->ops->trigger) {
+ ret = platform->driver->ops->trigger(substream, cmd);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (cpu_dai->driver->ops->trigger) {
+ ret = cpu_dai->driver->ops->trigger(substream, cmd, cpu_dai);
+ if (ret < 0)
+ return ret;
+ }
+ return 0;
+}
+
+/*
+ * soc level wrapper for pointer callback
+ * If cpu_dai, codec_dai, platform driver has the delay callback, than
+ * the runtime->delay will be updated accordingly.
+ */
+static snd_pcm_uframes_t soc_pcm_pointer(struct snd_pcm_substream *substream)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_pcm_uframes_t offset = 0;
+ snd_pcm_sframes_t delay = 0;
+
+ if (platform->driver->ops && platform->driver->ops->pointer)
+ offset = platform->driver->ops->pointer(substream);
+
+ if (cpu_dai->driver->ops->delay)
+ delay += cpu_dai->driver->ops->delay(substream, cpu_dai);
+
+ if (codec_dai->driver->ops->delay)
+ delay += codec_dai->driver->ops->delay(substream, codec_dai);
+
+ if (platform->driver->delay)
+ delay += platform->driver->delay(substream, codec_dai);
+
+ runtime->delay = delay;
+
+ return offset;
+}
+
+/* ASoC PCM operations */
+static struct snd_pcm_ops soc_pcm_ops = {
+ .open = soc_pcm_open,
+ .close = soc_pcm_close,
+ .hw_params = soc_pcm_hw_params,
+ .hw_free = soc_pcm_hw_free,
+ .prepare = soc_pcm_prepare,
+ .trigger = soc_pcm_trigger,
+ .pointer = soc_pcm_pointer,
+};
+
+/* create a new pcm */
+int soc_new_pcm(struct snd_soc_pcm_runtime *rtd, int num)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_pcm *pcm;
+ char new_name[64];
+ int ret = 0, playback = 0, capture = 0;
+
+ /* check client and interface hw capabilities */
+ snprintf(new_name, sizeof(new_name), "%s %s-%d",
+ rtd->dai_link->stream_name, codec_dai->name, num);
+
+ if (codec_dai->driver->playback.channels_min)
+ playback = 1;
+ if (codec_dai->driver->capture.channels_min)
+ capture = 1;
+
+ dev_dbg(rtd->card->dev, "registered pcm #%d %s\n",num,new_name);
+ ret = snd_pcm_new(rtd->card->snd_card, new_name,
+ num, playback, capture, &pcm);
+ if (ret < 0) {
+ printk(KERN_ERR "asoc: can't create pcm for codec %s\n", codec->name);
+ return ret;
+ }
+
+ /* DAPM dai link stream work */
+ INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
+
+ rtd->pcm = pcm;
+ pcm->private_data = rtd;
+ if (platform->driver->ops) {
+ soc_pcm_ops.mmap = platform->driver->ops->mmap;
+ soc_pcm_ops.pointer = platform->driver->ops->pointer;
+ soc_pcm_ops.ioctl = platform->driver->ops->ioctl;
+ soc_pcm_ops.copy = platform->driver->ops->copy;
+ soc_pcm_ops.silence = platform->driver->ops->silence;
+ soc_pcm_ops.ack = platform->driver->ops->ack;
+ soc_pcm_ops.page = platform->driver->ops->page;
+ }
+
+ if (playback)
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &soc_pcm_ops);
+
+ if (capture)
+ snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &soc_pcm_ops);
+
+ if (platform->driver->pcm_new) {
+ ret = platform->driver->pcm_new(rtd);
+ if (ret < 0) {
+ pr_err("asoc: platform pcm constructor failed\n");
+ return ret;
+ }
+ }
+
+ pcm->private_free = platform->driver->pcm_free;
+ printk(KERN_INFO "asoc: %s <-> %s mapping ok\n", codec_dai->name,
+ cpu_dai->name);
+ return ret;
+}