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-rw-r--r--sound/soc/soc-compress.c294
1 files changed, 294 insertions, 0 deletions
diff --git a/sound/soc/soc-compress.c b/sound/soc/soc-compress.c
new file mode 100644
index 000000000000..967d0e173e1b
--- /dev/null
+++ b/sound/soc/soc-compress.c
@@ -0,0 +1,294 @@
+/*
+ * soc-compress.c -- ALSA SoC Compress
+ *
+ * Copyright (C) 2012 Intel Corp.
+ *
+ * Authors: Namarta Kohli <namartax.kohli@intel.com>
+ * Ramesh Babu K V <ramesh.babu@linux.intel.com>
+ * Vinod Koul <vinod.koul@linux.intel.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/compress_params.h>
+#include <sound/compress_driver.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+static int soc_compr_open(struct snd_compr_stream *cstream)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->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;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->open) {
+ ret = platform->driver->compr_ops->open(cstream);
+ if (ret < 0) {
+ pr_err("compress asoc: can't open platform %s\n", platform->name);
+ goto out;
+ }
+ }
+
+ if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->startup) {
+ ret = rtd->dai_link->compr_ops->startup(cstream);
+ if (ret < 0) {
+ pr_err("compress asoc: %s startup failed\n", rtd->dai_link->name);
+ goto machine_err;
+ }
+ }
+
+ if (cstream->direction == SND_COMPRESS_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++;
+
+ return 0;
+
+machine_err:
+ if (platform->driver->compr_ops && platform->driver->compr_ops->free)
+ platform->driver->compr_ops->free(cstream);
+out:
+ return ret;
+}
+
+static int soc_compr_free(struct snd_compr_stream *cstream)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->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;
+
+ if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+ cpu_dai->playback_active--;
+ codec_dai->playback_active--;
+ } else {
+ cpu_dai->capture_active--;
+ codec_dai->capture_active--;
+ }
+
+ snd_soc_dai_digital_mute(codec_dai, 1);
+
+ cpu_dai->active--;
+ codec_dai->active--;
+ codec->active--;
+
+ if (!cpu_dai->active)
+ cpu_dai->rate = 0;
+
+ if (!codec_dai->active)
+ codec_dai->rate = 0;
+
+
+ if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->shutdown)
+ rtd->dai_link->compr_ops->shutdown(cstream);
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->free)
+ platform->driver->compr_ops->free(cstream);
+ cpu_dai->runtime = NULL;
+
+ if (cstream->direction == SND_COMPRESS_PLAYBACK) {
+ if (!rtd->pmdown_time || codec->ignore_pmdown_time ||
+ rtd->dai_link->ignore_pmdown_time) {
+ snd_soc_dapm_stream_event(rtd,
+ SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_STOP);
+ } else
+ 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,
+ SNDRV_PCM_STREAM_CAPTURE,
+ SND_SOC_DAPM_STREAM_STOP);
+ }
+
+ return 0;
+}
+
+static int soc_compr_trigger(struct snd_compr_stream *cstream, int cmd)
+{
+
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
+ ret = platform->driver->compr_ops->trigger(cstream, cmd);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (cmd == SNDRV_PCM_TRIGGER_START)
+ snd_soc_dai_digital_mute(codec_dai, 0);
+ else if (cmd == SNDRV_PCM_TRIGGER_STOP)
+ snd_soc_dai_digital_mute(codec_dai, 1);
+
+ return ret;
+}
+
+static int soc_compr_set_params(struct snd_compr_stream *cstream,
+ struct snd_compr_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ /* first we call set_params for the platform driver
+ * this should configure the soc side
+ * if the machine has compressed ops then we call that as well
+ * expectation is that platform and machine will configure everything
+ * for this compress path, like configuring pcm port for codec
+ */
+ if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
+ ret = platform->driver->compr_ops->set_params(cstream, params);
+ if (ret < 0)
+ return ret;
+ }
+
+ if (rtd->dai_link->compr_ops && rtd->dai_link->compr_ops->set_params) {
+ ret = rtd->dai_link->compr_ops->set_params(cstream);
+ if (ret < 0)
+ return ret;
+ }
+
+ snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
+ SND_SOC_DAPM_STREAM_START);
+
+ return ret;
+}
+
+static int soc_compr_get_params(struct snd_compr_stream *cstream,
+ struct snd_codec *params)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
+ ret = platform->driver->compr_ops->get_params(cstream, params);
+
+ return ret;
+}
+
+static int soc_compr_get_caps(struct snd_compr_stream *cstream,
+ struct snd_compr_caps *caps)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
+ ret = platform->driver->compr_ops->get_caps(cstream, caps);
+
+ return ret;
+}
+
+static int soc_compr_get_codec_caps(struct snd_compr_stream *cstream,
+ struct snd_compr_codec_caps *codec)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
+ ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
+
+ return ret;
+}
+
+static int soc_compr_ack(struct snd_compr_stream *cstream, size_t bytes)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+ int ret = 0;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
+ ret = platform->driver->compr_ops->ack(cstream, bytes);
+
+ return ret;
+}
+
+static int soc_compr_pointer(struct snd_compr_stream *cstream,
+ struct snd_compr_tstamp *tstamp)
+{
+ struct snd_soc_pcm_runtime *rtd = cstream->private_data;
+ struct snd_soc_platform *platform = rtd->platform;
+
+ if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
+ platform->driver->compr_ops->pointer(cstream, tstamp);
+
+ return 0;
+}
+
+/* ASoC Compress operations */
+static struct snd_compr_ops soc_compr_ops = {
+ .open = soc_compr_open,
+ .free = soc_compr_free,
+ .set_params = soc_compr_set_params,
+ .get_params = soc_compr_get_params,
+ .trigger = soc_compr_trigger,
+ .pointer = soc_compr_pointer,
+ .ack = soc_compr_ack,
+ .get_caps = soc_compr_get_caps,
+ .get_codec_caps = soc_compr_get_codec_caps
+};
+
+/* create a new compress */
+int soc_new_compress(struct snd_soc_pcm_runtime *rtd, int num)
+{
+ struct snd_soc_codec *codec = rtd->codec;
+ struct snd_soc_dai *codec_dai = rtd->codec_dai;
+ struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+ struct snd_compr *compr;
+ char new_name[64];
+ int ret = 0, direction = 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);
+ direction = SND_COMPRESS_PLAYBACK;
+ compr = kzalloc(sizeof(*compr), GFP_KERNEL);
+ if (compr == NULL) {
+ snd_printk(KERN_ERR "Cannot allocate compr\n");
+ return -ENOMEM;
+ }
+
+ compr->ops = &soc_compr_ops;
+ mutex_init(&compr->lock);
+ ret = snd_compress_new(rtd->card->snd_card, num, direction, compr);
+ if (ret < 0) {
+ pr_err("compress asoc: can't create compress for codec %s\n",
+ codec->name);
+ kfree(compr);
+ return ret;
+ }
+
+ rtd->compr = compr;
+ compr->private_data = rtd;
+
+ printk(KERN_INFO "compress asoc: %s <-> %s mapping ok\n", codec_dai->name,
+ cpu_dai->name);
+ return ret;
+}