[deliverable/linux.git] / sound / soc / intel / sst-mfld-platform-pcm.c

/*
 *  sst_mfld_platform.c - Intel MID Platform driver
 *
 *  Copyright (C) 2010-2014 Intel Corp
 *  Author: Vinod Koul <vinod.koul@intel.com>
 *  Author: Harsha Priya <priya.harsha@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; version 2 of the License.
 *
 *  This program is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/slab.h>
#include <linux/io.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/compress_driver.h>
#include <asm/platform_sst_audio.h>
#include "sst-mfld-platform.h"
#include "sst-atom-controls.h"

struct sst_device *sst;
static DEFINE_MUTEX(sst_lock);
extern struct snd_compr_ops sst_platform_compr_ops;

int sst_register_dsp(struct sst_device *dev)
{
	if (WARN_ON(!dev))
		return -EINVAL;
	if (!try_module_get(dev->dev->driver->owner))
		return -ENODEV;
	mutex_lock(&sst_lock);
	if (sst) {
		pr_err("we already have a device %s\n", sst->name);
		module_put(dev->dev->driver->owner);
		mutex_unlock(&sst_lock);
		return -EEXIST;
	}
	pr_debug("registering device %s\n", dev->name);
	sst = dev;
	mutex_unlock(&sst_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_register_dsp);

int sst_unregister_dsp(struct sst_device *dev)
{
	if (WARN_ON(!dev))
		return -EINVAL;
	if (dev != sst)
		return -EINVAL;

	mutex_lock(&sst_lock);

	if (!sst) {
		mutex_unlock(&sst_lock);
		return -EIO;
	}

	module_put(sst->dev->driver->owner);
	pr_debug("unreg %s\n", sst->name);
	sst = NULL;
	mutex_unlock(&sst_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_unregister_dsp);

static struct snd_pcm_hardware sst_platform_pcm_hw = {
	.info =	(SNDRV_PCM_INFO_INTERLEAVED |
			SNDRV_PCM_INFO_DOUBLE |
			SNDRV_PCM_INFO_PAUSE |
			SNDRV_PCM_INFO_RESUME |
			SNDRV_PCM_INFO_MMAP|
			SNDRV_PCM_INFO_MMAP_VALID |
			SNDRV_PCM_INFO_BLOCK_TRANSFER |
			SNDRV_PCM_INFO_SYNC_START),
	.buffer_bytes_max = SST_MAX_BUFFER,
	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	.periods_min = SST_MIN_PERIODS,
	.periods_max = SST_MAX_PERIODS,
	.fifo_size = SST_FIFO_SIZE,
};

static struct sst_dev_stream_map dpcm_strm_map[] = {
	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
};

/* MFLD - MSIC */
static struct snd_soc_dai_driver sst_platform_dai[] = {
{
	.name = "Headset-cpu-dai",
	.id = 0,
	.playback = {
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S24_LE,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 5,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S24_LE,
	},
},
{
	.name = "Compress-cpu-dai",
	.compress_dai = 1,
	.playback = {
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
},
};

/* helper functions */
void sst_set_stream_status(struct sst_runtime_stream *stream,
					int state)
{
	unsigned long flags;
	spin_lock_irqsave(&stream->status_lock, flags);
	stream->stream_status = state;
	spin_unlock_irqrestore(&stream->status_lock, flags);
}

static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
{
	int state;
	unsigned long flags;

	spin_lock_irqsave(&stream->status_lock, flags);
	state = stream->stream_status;
	spin_unlock_irqrestore(&stream->status_lock, flags);
	return state;
}

static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
				struct snd_sst_alloc_params_ext *alloc_param)
{
	unsigned int channels;
	snd_pcm_uframes_t period_size;
	ssize_t periodbytes;
	ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
	u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);

	channels = substream->runtime->channels;
	period_size = substream->runtime->period_size;
	periodbytes = samples_to_bytes(substream->runtime, period_size);
	alloc_param->ring_buf_info[0].addr = buffer_addr;
	alloc_param->ring_buf_info[0].size = buffer_bytes;
	alloc_param->sg_count = 1;
	alloc_param->reserved = 0;
	alloc_param->frag_size = periodbytes * channels;

}
static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
				struct snd_sst_stream_params *param)
{
	param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
	param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
	param->uc.pcm_params.sfreq = substream->runtime->rate;

	/* PCM stream via ALSA interface */
	param->uc.pcm_params.use_offload_path = 0;
	param->uc.pcm_params.reserved2 = 0;
	memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));

}

static int sst_get_stream_mapping(int dev, int sdev, int dir,
	struct sst_dev_stream_map *map, int size)
{
	int i;

	if (map == NULL)
		return -EINVAL;


	/* index 0 is not used in stream map */
	for (i = 1; i < size; i++) {
		if ((map[i].dev_num == dev) && (map[i].direction == dir))
			return i;
	}
	return 0;
}

int sst_fill_stream_params(void *substream,
	const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
{
	int map_size;
	int index;
	struct sst_dev_stream_map *map;
	struct snd_pcm_substream *pstream = NULL;
	struct snd_compr_stream *cstream = NULL;

	map = ctx->pdata->pdev_strm_map;
	map_size = ctx->pdata->strm_map_size;

	if (is_compress == true)
		cstream = (struct snd_compr_stream *)substream;
	else
		pstream = (struct snd_pcm_substream *)substream;

	str_params->stream_type = SST_STREAM_TYPE_MUSIC;

	/* For pcm streams */
	if (pstream) {
		index = sst_get_stream_mapping(pstream->pcm->device,
					  pstream->number, pstream->stream,
					  map, map_size);
		if (index <= 0)
			return -EINVAL;

		str_params->stream_id = index;
		str_params->device_type = map[index].device_id;
		str_params->task = map[index].task_id;

		str_params->ops = (u8)pstream->stream;
	}

	if (cstream) {
		index = sst_get_stream_mapping(cstream->device->device,
					       0, cstream->direction,
					       map, map_size);
		if (index <= 0)
			return -EINVAL;
		str_params->stream_id = index;
		str_params->device_type = map[index].device_id;
		str_params->task = map[index].task_id;

		str_params->ops = (u8)cstream->direction;
	}
	return 0;
}

static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
		struct snd_soc_platform *platform)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct snd_sst_stream_params param = {{{0,},},};
	struct snd_sst_params str_params = {0};
	struct snd_sst_alloc_params_ext alloc_params = {0};
	int ret_val = 0;
	struct sst_data *ctx = snd_soc_platform_get_drvdata(platform);

	/* set codec params and inform SST driver the same */
	sst_fill_pcm_params(substream, &param);
	sst_fill_alloc_params(substream, &alloc_params);
	substream->runtime->dma_area = substream->dma_buffer.area;
	str_params.sparams = param;
	str_params.aparams = alloc_params;
	str_params.codec = SST_CODEC_TYPE_PCM;

	/* fill the device type and stream id to pass to SST driver */
	ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
	if (ret_val < 0)
		return ret_val;

	stream->stream_info.str_id = str_params.stream_id;

	ret_val = stream->ops->open(sst->dev, &str_params);
	if (ret_val <= 0)
		return ret_val;


	return ret_val;
}

static void sst_period_elapsed(void *arg)
{
	struct snd_pcm_substream *substream = arg;
	struct sst_runtime_stream *stream;
	int status;

	if (!substream || !substream->runtime)
		return;
	stream = substream->runtime->private_data;
	if (!stream)
		return;
	status = sst_get_stream_status(stream);
	if (status != SST_PLATFORM_RUNNING)
		return;
	snd_pcm_period_elapsed(substream);
}

static int sst_platform_init_stream(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	int ret_val;

	pr_debug("setting buffer ptr param\n");
	sst_set_stream_status(stream, SST_PLATFORM_INIT);
	stream->stream_info.period_elapsed = sst_period_elapsed;
	stream->stream_info.arg = substream;
	stream->stream_info.buffer_ptr = 0;
	stream->stream_info.sfreq = substream->runtime->rate;
	ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
	if (ret_val)
		pr_err("control_set ret error %d\n", ret_val);
	return ret_val;

}

static int sst_media_open(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	int ret_val = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sst_runtime_stream *stream;

	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	if (!stream)
		return -ENOMEM;
	spin_lock_init(&stream->status_lock);

	/* get the sst ops */
	mutex_lock(&sst_lock);
	if (!sst ||
	    !try_module_get(sst->dev->driver->owner)) {
		pr_err("no device available to run\n");
		ret_val = -ENODEV;
		goto out_ops;
	}
	stream->ops = sst->ops;
	mutex_unlock(&sst_lock);

	stream->stream_info.str_id = 0;

	stream->stream_info.arg = substream;
	/* allocate memory for SST API set */
	runtime->private_data = stream;

	/* Make sure, that the period size is always even */
	snd_pcm_hw_constraint_step(substream->runtime, 0,
			   SNDRV_PCM_HW_PARAM_PERIODS, 2);

	return snd_pcm_hw_constraint_integer(runtime,
			 SNDRV_PCM_HW_PARAM_PERIODS);
out_ops:
	kfree(stream);
	mutex_unlock(&sst_lock);
	return ret_val;
}

static void sst_media_close(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct sst_runtime_stream *stream;
	int ret_val = 0, str_id;

	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (str_id)
		ret_val = stream->ops->close(sst->dev, str_id);
	module_put(sst->dev->driver->owner);
	kfree(stream);
}

static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
					       struct snd_pcm_substream *substream)
{
	struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
	struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	u32 str_id = stream->stream_info.str_id;
	unsigned int pipe_id;
	pipe_id = map[str_id].device_id;

	pr_debug("%s: got pipe_id = %#x for str_id = %d\n",
		 __func__, pipe_id, str_id);
	return pipe_id;
}

static int sst_media_prepare(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct sst_runtime_stream *stream;
	int ret_val = 0, str_id;

	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (stream->stream_info.str_id) {
		ret_val = stream->ops->stream_drop(sst->dev, str_id);
		return ret_val;
	}

	ret_val = sst_platform_alloc_stream(substream, dai->platform);
	if (ret_val <= 0)
		return ret_val;
	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
			"%d", stream->stream_info.str_id);

	ret_val = sst_platform_init_stream(substream);
	if (ret_val)
		return ret_val;
	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	return ret_val;
}

static int sst_media_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	return 0;
}

static int sst_media_hw_free(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	return snd_pcm_lib_free_pages(substream);
}

static struct snd_soc_dai_ops sst_media_dai_ops = {
	.startup = sst_media_open,
	.shutdown = sst_media_close,
	.prepare = sst_media_prepare,
	.hw_params = sst_media_hw_params,
	.hw_free = sst_media_hw_free,
};

static int sst_platform_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime;

	if (substream->pcm->internal)
		return 0;

	runtime = substream->runtime;
	runtime->hw = sst_platform_pcm_hw;
	return 0;
}

static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
					int cmd)
{
	int ret_val = 0, str_id;
	struct sst_runtime_stream *stream;
	int status;

	pr_debug("sst_platform_pcm_trigger called\n");
	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		pr_debug("sst: Trigger Start\n");
		status = SST_PLATFORM_RUNNING;
		stream->stream_info.arg = substream;
		ret_val = stream->ops->stream_start(sst->dev, str_id);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		pr_debug("sst: in stop\n");
		status = SST_PLATFORM_DROPPED;
		ret_val = stream->ops->stream_drop(sst->dev, str_id);
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		pr_debug("sst: in pause\n");
		status = SST_PLATFORM_PAUSED;
		ret_val = stream->ops->stream_pause(sst->dev, str_id);
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		pr_debug("sst: in pause release\n");
		status = SST_PLATFORM_RUNNING;
		ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
		break;
	default:
		return -EINVAL;
	}

	if (!ret_val)
		sst_set_stream_status(stream, status);

	return ret_val;
}


static snd_pcm_uframes_t sst_platform_pcm_pointer
			(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream;
	int ret_val, status;
	struct pcm_stream_info *str_info;

	stream = substream->runtime->private_data;
	status = sst_get_stream_status(stream);
	if (status == SST_PLATFORM_INIT)
		return 0;
	str_info = &stream->stream_info;
	ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
	if (ret_val) {
		pr_err("sst: error code = %d\n", ret_val);
		return ret_val;
	}
	substream->runtime->delay = str_info->pcm_delay;
	return str_info->buffer_ptr;
}

static struct snd_pcm_ops sst_platform_ops = {
	.open = sst_platform_open,
	.ioctl = snd_pcm_lib_ioctl,
	.trigger = sst_platform_pcm_trigger,
	.pointer = sst_platform_pcm_pointer,
};

static void sst_pcm_free(struct snd_pcm *pcm)
{
	pr_debug("sst_pcm_free called\n");
	snd_pcm_lib_preallocate_free_for_all(pcm);
}

static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *dai = rtd->cpu_dai;
	struct snd_pcm *pcm = rtd->pcm;
	int retval = 0;

	if (dai->driver->playback.channels_min ||
			dai->driver->capture.channels_min) {
		retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
			SNDRV_DMA_TYPE_CONTINUOUS,
			snd_dma_continuous_data(GFP_DMA),
			SST_MIN_BUFFER, SST_MAX_BUFFER);
		if (retval) {
			pr_err("dma buffer allocationf fail\n");
			return retval;
		}
	}
	return retval;
}

static int sst_soc_probe(struct snd_soc_platform *platform)
{
	return sst_dsp_init_v2_dpcm(platform);
}

static struct snd_soc_platform_driver sst_soc_platform_drv  = {
	.probe		= sst_soc_probe,
	.ops		= &sst_platform_ops,
	.compr_ops	= &sst_platform_compr_ops,
	.pcm_new	= sst_pcm_new,
	.pcm_free	= sst_pcm_free,
};

static const struct snd_soc_component_driver sst_component = {
	.name		= "sst",
};


static int sst_platform_probe(struct platform_device *pdev)
{
	struct sst_data *drv;
	int ret;
	struct sst_platform_data *pdata;

	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
	if (drv == NULL) {
		pr_err("kzalloc failed\n");
		return -ENOMEM;
	}

	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	if (pdata == NULL) {
		pr_err("kzalloc failed for pdata\n");
		return -ENOMEM;
	}

	pdata->pdev_strm_map = dpcm_strm_map;
	pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
	drv->pdata = pdata;
	mutex_init(&drv->lock);
	dev_set_drvdata(&pdev->dev, drv);

	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	if (ret) {
		pr_err("registering soc platform failed\n");
		return ret;
	}

	ret = snd_soc_register_component(&pdev->dev, &sst_component,
				sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	if (ret) {
		pr_err("registering cpu dais failed\n");
		snd_soc_unregister_platform(&pdev->dev);
	}
	return ret;
}

static int sst_platform_remove(struct platform_device *pdev)
{

	snd_soc_unregister_component(&pdev->dev);
	snd_soc_unregister_platform(&pdev->dev);
	pr_debug("sst_platform_remove success\n");
	return 0;
}

static struct platform_driver sst_platform_driver = {
	.driver		= {
		.name		= "sst-mfld-platform",
		.owner		= THIS_MODULE,
	},
	.probe		= sst_platform_probe,
	.remove		= sst_platform_remove,
};

module_platform_driver(sst_platform_driver);

MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sst-mfld-platform");
Commit	Line	Data
d927fdae	1	/*
a4b12990	2	* sst_mfld_platform.c - Intel MID Platform driver
d927fdae	3	*
61b165ca	4	* Copyright (C) 2010-2014 Intel Corp
d927fdae VK	5	* Author: Vinod Koul <vinod.koul@intel.com>
	6	* Author: Harsha Priya <priya.harsha@intel.com>
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; version 2 of the License.
	12	*
	13	* This program is distributed in the hope that it will be useful, but
	14	* WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	16	* General Public License for more details.
	17	*
d927fdae	18	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
d927fdae VK	19	*/
	20	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	21
	22	#include <linux/slab.h>
	23	#include <linux/io.h>
da155d5b	24	#include <linux/module.h>
d927fdae VK	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
c514a911	29	#include <sound/compress_driver.h>
61b165ca	30	#include <asm/platform_sst_audio.h>
a4b12990	31	#include "sst-mfld-platform.h"
61b165ca	32	#include "sst-atom-controls.h"
d927fdae	33
4b68b4e1	34	struct sst_device *sst;
03c33042	35	static DEFINE_MUTEX(sst_lock);
4b68b4e1	36	extern struct snd_compr_ops sst_platform_compr_ops;
03c33042 VK	37
	38	int sst_register_dsp(struct sst_device *dev)
	39	{
656a22a1 TI	40	if (WARN_ON(!dev))
656a22a1 TI	41	return -EINVAL;
03c33042 VK	42	if (!try_module_get(dev->dev->driver->owner))
	43	return -ENODEV;
	44	mutex_lock(&sst_lock);
	45	if (sst) {
	46	pr_err("we already have a device %s\n", sst->name);
	47	module_put(dev->dev->driver->owner);
	48	mutex_unlock(&sst_lock);
	49	return -EEXIST;
	50	}
	51	pr_debug("registering device %s\n", dev->name);
	52	sst = dev;
	53	mutex_unlock(&sst_lock);
	54	return 0;
	55	}
	56	EXPORT_SYMBOL_GPL(sst_register_dsp);
	57
	58	int sst_unregister_dsp(struct sst_device *dev)
	59	{
656a22a1 TI	60	if (WARN_ON(!dev))
656a22a1 TI	61	return -EINVAL;
03c33042 VK	62	if (dev != sst)
	63	return -EINVAL;
	64
	65	mutex_lock(&sst_lock);
	66
	67	if (!sst) {
	68	mutex_unlock(&sst_lock);
	69	return -EIO;
	70	}
	71
	72	module_put(sst->dev->driver->owner);
	73	pr_debug("unreg %s\n", sst->name);
	74	sst = NULL;
	75	mutex_unlock(&sst_lock);
	76	return 0;
	77	}
	78	EXPORT_SYMBOL_GPL(sst_unregister_dsp);
	79
d927fdae VK	80	static struct snd_pcm_hardware sst_platform_pcm_hw = {
	81	.info = (SNDRV_PCM_INFO_INTERLEAVED \|
	82	SNDRV_PCM_INFO_DOUBLE \|
	83	SNDRV_PCM_INFO_PAUSE \|
	84	SNDRV_PCM_INFO_RESUME \|
	85	SNDRV_PCM_INFO_MMAP\|
	86	SNDRV_PCM_INFO_MMAP_VALID \|
	87	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	88	SNDRV_PCM_INFO_SYNC_START),
d927fdae VK	89	.buffer_bytes_max = SST_MAX_BUFFER,
	90	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	91	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	92	.periods_min = SST_MIN_PERIODS,
	93	.periods_max = SST_MAX_PERIODS,
	94	.fifo_size = SST_FIFO_SIZE,
	95	};
	96
61b165ca VK	97	static struct sst_dev_stream_map dpcm_strm_map[] = {
	98	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
	99	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
	100	{MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
	101	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
	102	};
	103
d927fdae	104	/* MFLD - MSIC */
d1b73287	105	static struct snd_soc_dai_driver sst_platform_dai[] = {
d927fdae	106	{
5106f5a1	107	.name = "Headset-cpu-dai",
d927fdae VK	108	.id = 0,
	109	.playback = {
	110	.channels_min = SST_STEREO,
	111	.channels_max = SST_STEREO,
	112	.rates = SNDRV_PCM_RATE_48000,
	113	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	114	},
a7bffdf7 HP	115	.capture = {
	116	.channels_min = 1,
	117	.channels_max = 5,
	118	.rates = SNDRV_PCM_RATE_48000,
	119	.formats = SNDRV_PCM_FMTBIT_S24_LE,
d927fdae VK	120	},
d927fdae VK	121	},
c514a911 VK	122	{
	123	.name = "Compress-cpu-dai",
	124	.compress_dai = 1,
	125	.playback = {
	126	.channels_min = SST_STEREO,
	127	.channels_max = SST_STEREO,
	128	.rates = SNDRV_PCM_RATE_44100\|SNDRV_PCM_RATE_48000,
	129	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	130	},
	131	},
d927fdae	132	};
5c68536f	133
d927fdae	134	/* helper functions */
4496ffab	135	void sst_set_stream_status(struct sst_runtime_stream *stream,
5c68536f HP	136	int state)
5c68536f HP	137	{
d89b0a13 LG	138	unsigned long flags;
d89b0a13 LG	139	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	140	stream->stream_status = state;
d89b0a13	141	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	142	}
	143
	144	static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
	145	{
	146	int state;
d89b0a13	147	unsigned long flags;
5c68536f	148
d89b0a13	149	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	150	state = stream->stream_status;
d89b0a13	151	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	152	return state;
	153	}
	154
a870cdce VK	155	static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
	156	struct snd_sst_alloc_params_ext *alloc_param)
	157	{
	158	unsigned int channels;
	159	snd_pcm_uframes_t period_size;
	160	ssize_t periodbytes;
	161	ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
	162	u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
	163
	164	channels = substream->runtime->channels;
	165	period_size = substream->runtime->period_size;
	166	periodbytes = samples_to_bytes(substream->runtime, period_size);
	167	alloc_param->ring_buf_info[0].addr = buffer_addr;
	168	alloc_param->ring_buf_info[0].size = buffer_bytes;
	169	alloc_param->sg_count = 1;
	170	alloc_param->reserved = 0;
	171	alloc_param->frag_size = periodbytes * channels;
	172
	173	}
5c68536f	174	static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
a870cdce	175	struct snd_sst_stream_params *param)
5c68536f	176	{
a870cdce VK	177	param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
	178	param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
	179	param->uc.pcm_params.sfreq = substream->runtime->rate;
5c68536f	180
a870cdce VK	181	/* PCM stream via ALSA interface */
	182	param->uc.pcm_params.use_offload_path = 0;
	183	param->uc.pcm_params.reserved2 = 0;
	184	memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
	185
	186	}
61b165ca VK	187
	188	static int sst_get_stream_mapping(int dev, int sdev, int dir,
	189	struct sst_dev_stream_map *map, int size)
	190	{
	191	int i;
	192
	193	if (map == NULL)
	194	return -EINVAL;
	195
	196
	197	/* index 0 is not used in stream map */
	198	for (i = 1; i < size; i++) {
	199	if ((map[i].dev_num == dev) && (map[i].direction == dir))
	200	return i;
	201	}
	202	return 0;
	203	}
	204
a870cdce	205	int sst_fill_stream_params(void *substream,
61b165ca	206	const struct sst_data ctx, struct snd_sst_params str_params, bool is_compress)
a870cdce	207	{
61b165ca VK	208	int map_size;
	209	int index;
	210	struct sst_dev_stream_map *map;
a870cdce VK	211	struct snd_pcm_substream *pstream = NULL;
	212	struct snd_compr_stream *cstream = NULL;
	213
61b165ca VK	214	map = ctx->pdata->pdev_strm_map;
	215	map_size = ctx->pdata->strm_map_size;
	216
a870cdce VK	217	if (is_compress == true)
	218	cstream = (struct snd_compr_stream *)substream;
	219	else
	220	pstream = (struct snd_pcm_substream *)substream;
	221
	222	str_params->stream_type = SST_STREAM_TYPE_MUSIC;
	223
	224	/* For pcm streams */
61b165ca VK	225	if (pstream) {
	226	index = sst_get_stream_mapping(pstream->pcm->device,
	227	pstream->number, pstream->stream,
	228	map, map_size);
	229	if (index <= 0)
	230	return -EINVAL;
	231
	232	str_params->stream_id = index;
	233	str_params->device_type = map[index].device_id;
	234	str_params->task = map[index].task_id;
	235
a870cdce	236	str_params->ops = (u8)pstream->stream;
61b165ca VK	237	}
	238
	239	if (cstream) {
	240	index = sst_get_stream_mapping(cstream->device->device,
	241	0, cstream->direction,
	242	map, map_size);
	243	if (index <= 0)
	244	return -EINVAL;
	245	str_params->stream_id = index;
	246	str_params->device_type = map[index].device_id;
	247	str_params->task = map[index].task_id;
a870cdce	248
61b165ca VK	249	str_params->ops = (u8)cstream->direction;
61b165ca VK	250	}
a870cdce	251	return 0;
5c68536f HP	252	}
5c68536f HP	253
a870cdce VK	254	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
a870cdce VK	255	struct snd_soc_platform *platform)
d927fdae VK	256	{
	257	struct sst_runtime_stream *stream =
	258	substream->runtime->private_data;
a870cdce VK	259	struct snd_sst_stream_params param = {{{0,},},};
	260	struct snd_sst_params str_params = {0};
	261	struct snd_sst_alloc_params_ext alloc_params = {0};
	262	int ret_val = 0;
61b165ca	263	struct sst_data *ctx = snd_soc_platform_get_drvdata(platform);
d927fdae VK	264
d927fdae VK	265	/* set codec params and inform SST driver the same */
5c68536f	266	sst_fill_pcm_params(substream, &param);
a870cdce	267	sst_fill_alloc_params(substream, &alloc_params);
d927fdae	268	substream->runtime->dma_area = substream->dma_buffer.area;
d927fdae	269	str_params.sparams = param;
a870cdce VK	270	str_params.aparams = alloc_params;
	271	str_params.codec = SST_CODEC_TYPE_PCM;
	272
	273	/* fill the device type and stream id to pass to SST driver */
61b165ca	274	ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
d927fdae VK	275	if (ret_val < 0)
	276	return ret_val;
	277
a870cdce VK	278	stream->stream_info.str_id = str_params.stream_id;
a870cdce VK	279
b12b087c	280	ret_val = stream->ops->open(sst->dev, &str_params);
a870cdce VK	281	if (ret_val <= 0)
	282	return ret_val;
	283
	284
d927fdae VK	285	return ret_val;
	286	}
	287
9daa5bd3	288	static void sst_period_elapsed(void *arg)
d927fdae	289	{
9daa5bd3	290	struct snd_pcm_substream *substream = arg;
d927fdae	291	struct sst_runtime_stream *stream;
5c68536f	292	int status;
d927fdae VK	293
	294	if (!substream \|\| !substream->runtime)
	295	return;
	296	stream = substream->runtime->private_data;
	297	if (!stream)
	298	return;
5c68536f HP	299	status = sst_get_stream_status(stream);
5c68536f HP	300	if (status != SST_PLATFORM_RUNNING)
d927fdae	301	return;
d927fdae	302	snd_pcm_period_elapsed(substream);
d927fdae VK	303	}
	304
	305	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	306	{
	307	struct sst_runtime_stream *stream =
	308	substream->runtime->private_data;
	309	int ret_val;
	310
	311	pr_debug("setting buffer ptr param\n");
5c68536f	312	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae	313	stream->stream_info.period_elapsed = sst_period_elapsed;
9daa5bd3	314	stream->stream_info.arg = substream;
d927fdae VK	315	stream->stream_info.buffer_ptr = 0;
d927fdae VK	316	stream->stream_info.sfreq = substream->runtime->rate;
b12b087c	317	ret_val = stream->ops->stream_init(sst->dev, &stream->stream_info);
d927fdae VK	318	if (ret_val)
	319	pr_err("control_set ret error %d\n", ret_val);
	320	return ret_val;
	321
	322	}
d927fdae	323
6cc0f4e6 VK	324	static int sst_media_open(struct snd_pcm_substream *substream,
6cc0f4e6 VK	325	struct snd_soc_dai *dai)
d927fdae	326	{
6cc0f4e6	327	int ret_val = 0;
22be504a	328	struct snd_pcm_runtime *runtime = substream->runtime;
d927fdae	329	struct sst_runtime_stream *stream;
22be504a	330
d927fdae VK	331	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	332	if (!stream)
	333	return -ENOMEM;
d927fdae	334	spin_lock_init(&stream->status_lock);
03c33042 VK	335
	336	/* get the sst ops */
	337	mutex_lock(&sst_lock);
6cc0f4e6 VK	338	if (!sst \|\|
6cc0f4e6 VK	339	!try_module_get(sst->dev->driver->owner)) {
03c33042	340	pr_err("no device available to run\n");
6cc0f4e6 VK	341	ret_val = -ENODEV;
6cc0f4e6 VK	342	goto out_ops;
d927fdae	343	}
03c33042 VK	344	stream->ops = sst->ops;
	345	mutex_unlock(&sst_lock);
	346
	347	stream->stream_info.str_id = 0;
6cc0f4e6	348
9daa5bd3	349	stream->stream_info.arg = substream;
03c33042	350	/* allocate memory for SST API set */
d927fdae	351	runtime->private_data = stream;
283e42e0	352
6cc0f4e6 VK	353	/* Make sure, that the period size is always even */
	354	snd_pcm_hw_constraint_step(substream->runtime, 0,
	355	SNDRV_PCM_HW_PARAM_PERIODS, 2);
	356
	357	return snd_pcm_hw_constraint_integer(runtime,
	358	SNDRV_PCM_HW_PARAM_PERIODS);
	359	out_ops:
	360	kfree(stream);
	361	mutex_unlock(&sst_lock);
	362	return ret_val;
d927fdae VK	363	}
d927fdae VK	364
6cc0f4e6 VK	365	static void sst_media_close(struct snd_pcm_substream *substream,
6cc0f4e6 VK	366	struct snd_soc_dai *dai)
d927fdae VK	367	{
	368	struct sst_runtime_stream *stream;
	369	int ret_val = 0, str_id;
	370
d927fdae VK	371	stream = substream->runtime->private_data;
d927fdae VK	372	str_id = stream->stream_info.str_id;
d927fdae	373	if (str_id)
b12b087c	374	ret_val = stream->ops->close(sst->dev, str_id);
03c33042	375	module_put(sst->dev->driver->owner);
d927fdae	376	kfree(stream);
61b165ca VK	377	}
	378
	379	static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
	380	struct snd_pcm_substream *substream)
	381	{
	382	struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
	383	struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
	384	struct sst_runtime_stream *stream =
	385	substream->runtime->private_data;
	386	u32 str_id = stream->stream_info.str_id;
	387	unsigned int pipe_id;
	388	pipe_id = map[str_id].device_id;
	389
	390	pr_debug("%s: got pipe_id = %#x for str_id = %d\n",
	391	__func__, pipe_id, str_id);
	392	return pipe_id;
d927fdae VK	393	}
d927fdae VK	394
6cc0f4e6 VK	395	static int sst_media_prepare(struct snd_pcm_substream *substream,
6cc0f4e6 VK	396	struct snd_soc_dai *dai)
d927fdae VK	397	{
	398	struct sst_runtime_stream *stream;
	399	int ret_val = 0, str_id;
	400
d927fdae VK	401	stream = substream->runtime->private_data;
	402	str_id = stream->stream_info.str_id;
	403	if (stream->stream_info.str_id) {
b12b087c	404	ret_val = stream->ops->stream_drop(sst->dev, str_id);
d927fdae VK	405	return ret_val;
	406	}
	407
a870cdce VK	408	ret_val = sst_platform_alloc_stream(substream, dai->platform);
a870cdce VK	409	if (ret_val <= 0)
d927fdae VK	410	return ret_val;
	411	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	412	"%d", stream->stream_info.str_id);
	413
	414	ret_val = sst_platform_init_stream(substream);
	415	if (ret_val)
	416	return ret_val;
	417	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	418	return ret_val;
	419	}
	420
6cc0f4e6 VK	421	static int sst_media_hw_params(struct snd_pcm_substream *substream,
	422	struct snd_pcm_hw_params *params,
	423	struct snd_soc_dai *dai)
	424	{
	425	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	426	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	427	return 0;
	428	}
	429
	430	static int sst_media_hw_free(struct snd_pcm_substream *substream,
	431	struct snd_soc_dai *dai)
	432	{
	433	return snd_pcm_lib_free_pages(substream);
	434	}
	435
	436	static struct snd_soc_dai_ops sst_media_dai_ops = {
	437	.startup = sst_media_open,
	438	.shutdown = sst_media_close,
	439	.prepare = sst_media_prepare,
	440	.hw_params = sst_media_hw_params,
	441	.hw_free = sst_media_hw_free,
	442	};
	443
	444	static int sst_platform_open(struct snd_pcm_substream *substream)
	445	{
	446	struct snd_pcm_runtime *runtime;
	447
	448	if (substream->pcm->internal)
	449	return 0;
	450
	451	runtime = substream->runtime;
	452	runtime->hw = sst_platform_pcm_hw;
	453	return 0;
	454	}
	455
5106f5a1	456	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
d927fdae VK	457	int cmd)
	458	{
	459	int ret_val = 0, str_id;
	460	struct sst_runtime_stream *stream;
5981c2d6	461	int status;
d927fdae	462
5106f5a1	463	pr_debug("sst_platform_pcm_trigger called\n");
d927fdae	464	stream = substream->runtime->private_data;
d927fdae	465	str_id = stream->stream_info.str_id;
d927fdae VK	466	switch (cmd) {
	467	case SNDRV_PCM_TRIGGER_START:
	468	pr_debug("sst: Trigger Start\n");
a211701e	469	status = SST_PLATFORM_RUNNING;
9daa5bd3	470	stream->stream_info.arg = substream;
b12b087c	471	ret_val = stream->ops->stream_start(sst->dev, str_id);
d927fdae VK	472	break;
	473	case SNDRV_PCM_TRIGGER_STOP:
	474	pr_debug("sst: in stop\n");
a211701e	475	status = SST_PLATFORM_DROPPED;
b12b087c	476	ret_val = stream->ops->stream_drop(sst->dev, str_id);
d927fdae VK	477	break;
	478	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	479	pr_debug("sst: in pause\n");
a211701e	480	status = SST_PLATFORM_PAUSED;
b12b087c	481	ret_val = stream->ops->stream_pause(sst->dev, str_id);
d927fdae VK	482	break;
	483	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	484	pr_debug("sst: in pause release\n");
a211701e	485	status = SST_PLATFORM_RUNNING;
b12b087c	486	ret_val = stream->ops->stream_pause_release(sst->dev, str_id);
d927fdae VK	487	break;
d927fdae VK	488	default:
a211701e	489	return -EINVAL;
d927fdae	490	}
5981c2d6	491
a211701e HP	492	if (!ret_val)
	493	sst_set_stream_status(stream, status);
	494
d927fdae VK	495	return ret_val;
	496	}
	497
	498
5106f5a1	499	static snd_pcm_uframes_t sst_platform_pcm_pointer
d927fdae VK	500	(struct snd_pcm_substream *substream)
	501	{
	502	struct sst_runtime_stream *stream;
5c68536f	503	int ret_val, status;
d927fdae VK	504	struct pcm_stream_info *str_info;
d927fdae VK	505
d927fdae	506	stream = substream->runtime->private_data;
5c68536f HP	507	status = sst_get_stream_status(stream);
5c68536f HP	508	if (status == SST_PLATFORM_INIT)
d927fdae	509	return 0;
d927fdae	510	str_info = &stream->stream_info;
b12b087c	511	ret_val = stream->ops->stream_read_tstamp(sst->dev, str_info);
d927fdae VK	512	if (ret_val) {
	513	pr_err("sst: error code = %d\n", ret_val);
	514	return ret_val;
	515	}
2a635825	516	substream->runtime->delay = str_info->pcm_delay;
6cc0f4e6	517	return str_info->buffer_ptr;
9ab88434	518	}
9ab88434	519
d927fdae	520	static struct snd_pcm_ops sst_platform_ops = {
5106f5a1	521	.open = sst_platform_open,
d927fdae	522	.ioctl = snd_pcm_lib_ioctl,
5106f5a1 VK	523	.trigger = sst_platform_pcm_trigger,
5106f5a1 VK	524	.pointer = sst_platform_pcm_pointer,
d927fdae VK	525	};
	526
	527	static void sst_pcm_free(struct snd_pcm *pcm)
	528	{
	529	pr_debug("sst_pcm_free called\n");
	530	snd_pcm_lib_preallocate_free_for_all(pcm);
	531	}
	532
8faa8c1a	533	static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
d927fdae	534	{
6cc0f4e6	535	struct snd_soc_dai *dai = rtd->cpu_dai;
552d1ef6	536	struct snd_pcm *pcm = rtd->pcm;
d927fdae VK	537	int retval = 0;
d927fdae VK	538
6cc0f4e6 VK	539	if (dai->driver->playback.channels_min \|\|
6cc0f4e6 VK	540	dai->driver->capture.channels_min) {
d927fdae VK	541	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
d927fdae VK	542	SNDRV_DMA_TYPE_CONTINUOUS,
6cc0f4e6	543	snd_dma_continuous_data(GFP_DMA),
d927fdae VK	544	SST_MIN_BUFFER, SST_MAX_BUFFER);
	545	if (retval) {
	546	pr_err("dma buffer allocationf fail\n");
	547	return retval;
	548	}
	549	}
d927fdae VK	550	return retval;
d927fdae VK	551	}
c514a911	552
d8499c9b VK	553	static int sst_soc_probe(struct snd_soc_platform *platform)
	554	{
	555	return sst_dsp_init_v2_dpcm(platform);
	556	}
	557
	558	static struct snd_soc_platform_driver sst_soc_platform_drv = {
	559	.probe = sst_soc_probe,
d927fdae	560	.ops = &sst_platform_ops,
c514a911	561	.compr_ops = &sst_platform_compr_ops,
d927fdae VK	562	.pcm_new = sst_pcm_new,
	563	.pcm_free = sst_pcm_free,
	564	};
	565
2b4c78df VK	566	static const struct snd_soc_component_driver sst_component = {
	567	.name = "sst",
	568	};
	569
	570
d927fdae VK	571	static int sst_platform_probe(struct platform_device *pdev)
d927fdae VK	572	{
61b165ca	573	struct sst_data *drv;
d927fdae	574	int ret;
2741d43a	575	struct sst_platform_data *pdata;
61b165ca VK	576
61b165ca VK	577	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
19a23a5d	578	if (drv == NULL) {
61b165ca VK	579	pr_err("kzalloc failed\n");
	580	return -ENOMEM;
	581	}
	582
2741d43a SP	583	pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
	584	if (pdata == NULL) {
	585	pr_err("kzalloc failed for pdata\n");
	586	return -ENOMEM;
	587	}
	588
61b165ca VK	589	pdata->pdev_strm_map = dpcm_strm_map;
	590	pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
	591	drv->pdata = pdata;
	592	mutex_init(&drv->lock);
	593	dev_set_drvdata(&pdev->dev, drv);
d927fdae	594
d927fdae VK	595	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	596	if (ret) {
	597	pr_err("registering soc platform failed\n");
	598	return ret;
	599	}
5c68536f	600
b1c36861	601	ret = snd_soc_register_component(&pdev->dev, &sst_component,
d927fdae VK	602	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	603	if (ret) {
	604	pr_err("registering cpu dais failed\n");
	605	snd_soc_unregister_platform(&pdev->dev);
	606	}
	607	return ret;
	608	}
	609
	610	static int sst_platform_remove(struct platform_device *pdev)
	611	{
	612
b1c36861	613	snd_soc_unregister_component(&pdev->dev);
d927fdae	614	snd_soc_unregister_platform(&pdev->dev);
25985edc	615	pr_debug("sst_platform_remove success\n");
d927fdae VK	616	return 0;
	617	}
	618
	619	static struct platform_driver sst_platform_driver = {
	620	.driver = {
a4b12990	621	.name = "sst-mfld-platform",
d927fdae VK	622	.owner = THIS_MODULE,
	623	},
	624	.probe = sst_platform_probe,
	625	.remove = sst_platform_remove,
	626	};
	627
29515d62	628	module_platform_driver(sst_platform_driver);
d927fdae VK	629
	630	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	631	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	632	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	633	MODULE_LICENSE("GPL v2");
a4b12990	634	MODULE_ALIAS("platform:sst-mfld-platform");