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/*
* 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;
}
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