/*
   * 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>
  #include <sound/soc-dpcm.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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	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
  ", 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
  ", 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++;
  
  	mutex_unlock(&rtd->pcm_mutex);
  
  	return 0;
  
  machine_err:
  	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
  		platform->driver->compr_ops->free(cstream);
  out:
  	mutex_unlock(&rtd->pcm_mutex);
  	return ret;
  }
  
  static int soc_compr_open_fe(struct snd_compr_stream *cstream)
  {
  	struct snd_soc_pcm_runtime *fe = cstream->private_data;
  	struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
  	struct snd_soc_platform *platform = fe->platform;
  	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
  	struct snd_soc_dai *codec_dai = fe->codec_dai;
  	struct snd_soc_dpcm *dpcm;
  	struct snd_soc_dapm_widget_list *list;
  	int stream;
  	int ret = 0;
  
  	if (cstream->direction == SND_COMPRESS_PLAYBACK)
  		stream = SNDRV_PCM_STREAM_PLAYBACK;
  	else
  		stream = SNDRV_PCM_STREAM_CAPTURE;
  
  	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
  
  	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
  ", platform->name);
  			goto out;
  		}
  	}
  
  	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->startup) {
  		ret = fe->dai_link->compr_ops->startup(cstream);
  		if (ret < 0) {
  			pr_err("compress asoc: %s startup failed
  ", fe->dai_link->name);
  			goto machine_err;
  		}
  	}
  
  	fe->dpcm[stream].runtime = fe_substream->runtime;
  
  	if (dpcm_path_get(fe, stream, &list) <= 0) {
  		dev_dbg(fe->dev, "ASoC: %s no valid %s route
  ",
  			fe->dai_link->name, stream ? "capture" : "playback");
  	}
  
  	/* calculate valid and active FE <-> BE dpcms */
  	dpcm_process_paths(fe, stream, &list, 1);
  
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
  
  	ret = dpcm_be_dai_startup(fe, stream);
  	if (ret < 0) {
  		/* clean up all links */
  		list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
  			dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
  
  		dpcm_be_disconnect(fe, stream);
  		fe->dpcm[stream].runtime = NULL;
  		goto fe_err;
  	}
  
  	dpcm_clear_pending_state(fe, stream);
  	dpcm_path_put(&list);
  
  	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_OPEN;
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
  
  	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++;
  	fe->codec->active++;
  
  	mutex_unlock(&fe->card->mutex);
  
  	return 0;
  
  fe_err:
  	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
  		fe->dai_link->compr_ops->shutdown(cstream);
  machine_err:
  	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
  		platform->driver->compr_ops->free(cstream);
  out:
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
  	mutex_unlock(&fe->card->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);
  
  	dev_dbg(rtd->dev, "ASoC: pop wq checking: %s status: %s waiting: %s
  ",
  		 codec_dai->driver->playback.stream_name,
  		 codec_dai->playback_active ? "active" : "inactive",
  		 rtd->pop_wait ? "yes" : "no");
  
  	/* are we waiting on this codec DAI stream */
  	if (rtd->pop_wait == 1) {
  		rtd->pop_wait = 0;
  		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
  					  SND_SOC_DAPM_STREAM_STOP);
  	}
  
  	mutex_unlock(&rtd->pcm_mutex);
  }
  
  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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	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, cstream->direction);
  
  	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 {
  			rtd->pop_wait = 1;
  			queue_delayed_work(system_power_efficient_wq,
  					   &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);
  	}
  
  	mutex_unlock(&rtd->pcm_mutex);
  	return 0;
  }
  
  static int soc_compr_free_fe(struct snd_compr_stream *cstream)
  {
  	struct snd_soc_pcm_runtime *fe = cstream->private_data;
  	struct snd_soc_platform *platform = fe->platform;
  	struct snd_soc_dai *cpu_dai = fe->cpu_dai;
  	struct snd_soc_dai *codec_dai = fe->codec_dai;
  	struct snd_soc_dpcm *dpcm;
  	int stream, ret;
  
  	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
  
  	if (cstream->direction == SND_COMPRESS_PLAYBACK) {
  		stream = SNDRV_PCM_STREAM_PLAYBACK;
  		cpu_dai->playback_active--;
  		codec_dai->playback_active--;
  	} else {
  		stream = SNDRV_PCM_STREAM_CAPTURE;
  		cpu_dai->capture_active--;
  		codec_dai->capture_active--;
  	}
  
  	cpu_dai->active--;
  	codec_dai->active--;
  	fe->codec->active--;
  
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
  
  	ret = dpcm_be_dai_hw_free(fe, stream);
  	if (ret < 0)
  		dev_err(fe->dev, "compressed hw_free failed %d
  ", ret);
  
  	ret = dpcm_be_dai_shutdown(fe, stream);
  
  	/* mark FE's links ready to prune */
  	list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be)
  		dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
  
  	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
  		dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
  	else
  		dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_STOP);
  
  	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
  
  	dpcm_be_disconnect(fe, stream);
  
  	fe->dpcm[stream].runtime = NULL;
  
  	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->shutdown)
  		fe->dai_link->compr_ops->shutdown(cstream);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->free)
  		platform->driver->compr_ops->free(cstream);
  
  	mutex_unlock(&fe->card->mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
  		ret = platform->driver->compr_ops->trigger(cstream, cmd);
  		if (ret < 0)
  			goto out;
  	}
  
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  		snd_soc_dai_digital_mute(codec_dai, 0, cstream->direction);
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  		snd_soc_dai_digital_mute(codec_dai, 1, cstream->direction);
  		break;
  	}
  
  out:
  	mutex_unlock(&rtd->pcm_mutex);
  	return ret;
  }
  
  static int soc_compr_trigger_fe(struct snd_compr_stream *cstream, int cmd)
  {
  	struct snd_soc_pcm_runtime *fe = cstream->private_data;
  	struct snd_soc_platform *platform = fe->platform;
  	int ret = 0, stream;
  
  	if (cmd == SND_COMPR_TRIGGER_PARTIAL_DRAIN ||
  		cmd == SND_COMPR_TRIGGER_DRAIN) {
  
  		if (platform->driver->compr_ops &&
  			platform->driver->compr_ops->trigger)
  		return platform->driver->compr_ops->trigger(cstream, cmd);
  	}
  
  	if (cstream->direction == SND_COMPRESS_PLAYBACK)
  		stream = SNDRV_PCM_STREAM_PLAYBACK;
  	else
  		stream = SNDRV_PCM_STREAM_CAPTURE;
  
  
  	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->trigger) {
  		ret = platform->driver->compr_ops->trigger(cstream, cmd);
  		if (ret < 0)
  			goto out;
  	}
  
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
  
  	ret = dpcm_be_dai_trigger(fe, stream, cmd);
  
  	switch (cmd) {
  	case SNDRV_PCM_TRIGGER_START:
  	case SNDRV_PCM_TRIGGER_RESUME:
  	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_START;
  		break;
  	case SNDRV_PCM_TRIGGER_STOP:
  	case SNDRV_PCM_TRIGGER_SUSPEND:
  		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_STOP;
  		break;
  	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  		fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PAUSED;
  		break;
  	}
  
  out:
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
  	mutex_unlock(&fe->card->mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	/* 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)
  			goto err;
  	}
  
  	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)
  			goto err;
  	}
  
  	if (cstream->direction == SND_COMPRESS_PLAYBACK)
  		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_PLAYBACK,
  					SND_SOC_DAPM_STREAM_START);
  	else
  		snd_soc_dapm_stream_event(rtd, SNDRV_PCM_STREAM_CAPTURE,
  					SND_SOC_DAPM_STREAM_START);
  
  	/* cancel any delayed stream shutdown that is pending */
  	rtd->pop_wait = 0;
  	mutex_unlock(&rtd->pcm_mutex);
  
  	cancel_delayed_work_sync(&rtd->delayed_work);
  
  	return ret;
  
  err:
  	mutex_unlock(&rtd->pcm_mutex);
  	return ret;
  }
  
  static int soc_compr_set_params_fe(struct snd_compr_stream *cstream,
  					struct snd_compr_params *params)
  {
  	struct snd_soc_pcm_runtime *fe = cstream->private_data;
  	struct snd_pcm_substream *fe_substream = fe->pcm->streams[0].substream;
  	struct snd_soc_platform *platform = fe->platform;
  	int ret = 0, stream;
  
  	if (cstream->direction == SND_COMPRESS_PLAYBACK)
  		stream = SNDRV_PCM_STREAM_PLAYBACK;
  	else
  		stream = SNDRV_PCM_STREAM_CAPTURE;
  
  	mutex_lock_nested(&fe->card->mutex, SND_SOC_CARD_CLASS_RUNTIME);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->set_params) {
  		ret = platform->driver->compr_ops->set_params(cstream, params);
  		if (ret < 0)
  			goto out;
  	}
  
  	if (fe->dai_link->compr_ops && fe->dai_link->compr_ops->set_params) {
  		ret = fe->dai_link->compr_ops->set_params(cstream);
  		if (ret < 0)
  			goto out;
  	}
  
  	/*
  	 * Create an empty hw_params for the BE as the machine driver must
  	 * fix this up to match DSP decoder and ASRC configuration.
  	 * I.e. machine driver fixup for compressed BE is mandatory.
  	 */
  	memset(&fe->dpcm[fe_substream->stream].hw_params, 0,
  		sizeof(struct snd_pcm_hw_params));
  
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_FE;
  
  	ret = dpcm_be_dai_hw_params(fe, stream);
  	if (ret < 0)
  		goto out;
  
  	ret = dpcm_be_dai_prepare(fe, stream);
  	if (ret < 0)
  		goto out;
  
  	if (stream == SNDRV_PCM_STREAM_PLAYBACK)
  		dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
  	else
  		dpcm_dapm_stream_event(fe, stream, SND_SOC_DAPM_STREAM_START);
  
  	fe->dpcm[stream].state = SND_SOC_DPCM_STATE_PREPARE;
  
  out:
  	fe->dpcm[stream].runtime_update = SND_SOC_DPCM_UPDATE_NO;
  	mutex_unlock(&fe->card->mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->get_params)
  		ret = platform->driver->compr_ops->get_params(cstream, params);
  
  	mutex_unlock(&rtd->pcm_mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->get_caps)
  		ret = platform->driver->compr_ops->get_caps(cstream, caps);
  
  	mutex_unlock(&rtd->pcm_mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->get_codec_caps)
  		ret = platform->driver->compr_ops->get_codec_caps(cstream, codec);
  
  	mutex_unlock(&rtd->pcm_mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->ack)
  		ret = platform->driver->compr_ops->ack(cstream, bytes);
  
  	mutex_unlock(&rtd->pcm_mutex);
  	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;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->pointer)
  		 platform->driver->compr_ops->pointer(cstream, tstamp);
  
  	mutex_unlock(&rtd->pcm_mutex);
  	return 0;
  }
  
  static int soc_compr_copy(struct snd_compr_stream *cstream,
  			  char __user *buf, size_t count)
  {
  	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
  	struct snd_soc_platform *platform = rtd->platform;
  	int ret = 0;
  
  	mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
  
  	if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
  		ret = platform->driver->compr_ops->copy(cstream, buf, count);
  
  	mutex_unlock(&rtd->pcm_mutex);
  	return ret;
  }
  
  static int soc_compr_set_metadata(struct snd_compr_stream *cstream,
  				struct snd_compr_metadata *metadata)
  {
  	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->set_metadata)
  		ret = platform->driver->compr_ops->set_metadata(cstream, metadata);
  
  	return ret;
  }
  
  static int soc_compr_get_metadata(struct snd_compr_stream *cstream,
  				struct snd_compr_metadata *metadata)
  {
  	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_metadata)
  		ret = platform->driver->compr_ops->get_metadata(cstream, metadata);
  
  	return ret;
  }
  
  /* 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,
  	.set_metadata   = soc_compr_set_metadata,
  	.get_metadata	= soc_compr_get_metadata,
  	.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
  };
  
  /* ASoC Dynamic Compress operations */
  static struct snd_compr_ops soc_compr_dyn_ops = {
  	.open		= soc_compr_open_fe,
  	.free		= soc_compr_free_fe,
  	.set_params	= soc_compr_set_params_fe,
  	.get_params	= soc_compr_get_params,
  	.set_metadata   = soc_compr_set_metadata,
  	.get_metadata	= soc_compr_get_metadata,
  	.trigger	= soc_compr_trigger_fe,
  	.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_platform *platform = rtd->platform;
  	struct snd_soc_dai *codec_dai = rtd->codec_dai;
  	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  	struct snd_compr *compr;
  	struct snd_pcm *be_pcm;
  	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);
  
  	if (codec_dai->driver->playback.channels_min)
  		direction = SND_COMPRESS_PLAYBACK;
  	else if (codec_dai->driver->capture.channels_min)
  		direction = SND_COMPRESS_CAPTURE;
  	else
  		return -EINVAL;
  
  	compr = kzalloc(sizeof(*compr), GFP_KERNEL);
  	if (compr == NULL) {
  		snd_printk(KERN_ERR "Cannot allocate compr
  ");
  		return -ENOMEM;
  	}
  
  	compr->ops = devm_kzalloc(rtd->card->dev, sizeof(soc_compr_ops),
  				  GFP_KERNEL);
  	if (compr->ops == NULL) {
  		dev_err(rtd->card->dev, "Cannot allocate compressed ops
  ");
  		ret = -ENOMEM;
  		goto compr_err;
  	}
  
  	if (rtd->dai_link->dynamic) {
  		snprintf(new_name, sizeof(new_name), "(%s)",
  			rtd->dai_link->stream_name);
  
  		ret = snd_pcm_new_internal(rtd->card->snd_card, new_name, num,
  				1, 0, &be_pcm);
  		if (ret < 0) {
  			dev_err(rtd->card->dev, "ASoC: can't create compressed for %s
  ",
  				rtd->dai_link->name);
  			goto compr_err;
  		}
  
  		rtd->pcm = be_pcm;
  		rtd->fe_compr = 1;
  		be_pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream->private_data = rtd;
  		be_pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream->private_data = rtd;
  		memcpy(compr->ops, &soc_compr_dyn_ops, sizeof(soc_compr_dyn_ops));
  	} else
  		memcpy(compr->ops, &soc_compr_ops, sizeof(soc_compr_ops));
  
  	/* Add copy callback for not memory mapped DSPs */
  	if (platform->driver->compr_ops && platform->driver->compr_ops->copy)
  		compr->ops->copy = soc_compr_copy;
  
  	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
  ",
  			codec->name);
  		goto compr_err;
  	}
  
  	/* DAPM dai link stream work */
  	INIT_DELAYED_WORK(&rtd->delayed_work, close_delayed_work);
  
  	rtd->compr = compr;
  	compr->private_data = rtd;
  
  	printk(KERN_INFO "compress asoc: %s <-> %s mapping ok
  ", codec_dai->name,
  		cpu_dai->name);
  	return ret;
  
  compr_err:
  	kfree(compr);
  	return ret;
  }