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

/*
 *  sst_mfld_platform.c - Intel MID Platform driver
 *
 *  Copyright (C) 2010-2013 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 "sst-mfld-platform.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,
};

/* MFLD - MSIC */
static struct snd_soc_dai_driver sst_platform_dai[] = {
{
	.name = "media-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_pcm_params(struct snd_pcm_substream *substream,
				struct sst_pcm_params *param)
{

	param->codec = SST_CODEC_TYPE_PCM;
	param->num_chan = (u8) substream->runtime->channels;
	param->pcm_wd_sz = substream->runtime->sample_bits;
	param->reserved = 0;
	param->sfreq = substream->runtime->rate;
	param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	param->period_count = substream->runtime->period_size;
	param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
	pr_debug("period_cnt = %d\n", param->period_count);
	pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
}

static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct sst_pcm_params param = {0};
	struct sst_stream_params str_params = {0};
	int ret_val;

	/* set codec params and inform SST driver the same */
	sst_fill_pcm_params(substream, &param);
	substream->runtime->dma_area = substream->dma_buffer.area;
	str_params.sparams = param;
	str_params.codec =  param.codec;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		str_params.ops = STREAM_OPS_PLAYBACK;
		str_params.device_type = substream->pcm->device + 1;
		pr_debug("Playbck stream,Device %d\n",
					substream->pcm->device);
	} else {
		str_params.ops = STREAM_OPS_CAPTURE;
		str_params.device_type = SND_SST_DEVICE_CAPTURE;
		pr_debug("Capture stream,Device %d\n",
					substream->pcm->device);
	}
	ret_val = stream->ops->open(&str_params);
	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	if (ret_val < 0)
		return ret_val;

	stream->stream_info.str_id = ret_val;
	pr_debug("str id :  %d\n", stream->stream_info.str_id);
	return ret_val;
}

static void sst_period_elapsed(void *mad_substream)
{
	struct snd_pcm_substream *substream = mad_substream;
	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.mad_substream = substream;
	stream->stream_info.buffer_ptr = 0;
	stream->stream_info.sfreq = substream->runtime->rate;
	ret_val = stream->ops->device_control(
			SST_SND_STREAM_INIT, &stream->stream_info);
	if (ret_val)
		pr_err("control_set ret error %d\n", ret_val);
	return ret_val;

}
/* end -- helper functions */

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

	pr_debug("sst_platform_media_open called\n");

	snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
	ret_val = snd_pcm_hw_constraint_integer(runtime,
						SNDRV_PCM_HW_PARAM_PERIODS);
	if (ret_val < 0)
		return ret_val;

	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) {
		pr_err("no device available to run\n");
		mutex_unlock(&sst_lock);
		kfree(stream);
		return -ENODEV;
	}
	if (!try_module_get(sst->dev->driver->owner)) {
		mutex_unlock(&sst_lock);
		kfree(stream);
		return -ENODEV;
	}
	stream->ops = sst->ops;
	mutex_unlock(&sst_lock);

	stream->stream_info.str_id = 0;
	sst_set_stream_status(stream, SST_PLATFORM_INIT);
	stream->stream_info.mad_substream = substream;
	/* allocate memory for SST API set */
	runtime->private_data = stream;

	return 0;
}

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

	pr_debug("sst_platform_media_close called\n");
	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (str_id)
		ret_val = stream->ops->close(str_id);
	module_put(sst->dev->driver->owner);
	kfree(stream);
	return ret_val;
}

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

	pr_debug("sst_platform_pcm_media_prepare called\n");
	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (stream->stream_info.str_id) {
		ret_val = stream->ops->device_control(
				SST_SND_DROP, &str_id);
		return ret_val;
	}

	ret_val = sst_platform_alloc_stream(substream);
	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_platform_pcm_media_trigger(struct snd_pcm_substream *substream,
					int cmd)
{
	int ret_val = 0, str_id;
	struct sst_runtime_stream *stream;
	int str_cmd, status;

	pr_debug("sst_platform_pcm_media_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");
		str_cmd = SST_SND_START;
		status = SST_PLATFORM_RUNNING;
		stream->stream_info.mad_substream = substream;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		pr_debug("sst: in stop\n");
		str_cmd = SST_SND_DROP;
		status = SST_PLATFORM_DROPPED;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		pr_debug("sst: in pause\n");
		str_cmd = SST_SND_PAUSE;
		status = SST_PLATFORM_PAUSED;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		pr_debug("sst: in pause release\n");
		str_cmd = SST_SND_RESUME;
		status = SST_PLATFORM_RUNNING;
		break;
	default:
		return -EINVAL;
	}
	ret_val = stream->ops->device_control(str_cmd, &str_id);
	if (!ret_val)
		sst_set_stream_status(stream, status);

	return ret_val;
}


static snd_pcm_uframes_t sst_platform_pcm_media_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->device_control(
				SST_SND_BUFFER_POINTER, str_info);
	if (ret_val) {
		pr_err("sst: error code = %d\n", ret_val);
		return ret_val;
	}
	return stream->stream_info.buffer_ptr;
}

static int sst_platform_pcm_media_hw_params(struct snd_pcm_substream *substream,
		struct snd_pcm_hw_params *params)
{
	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_platform_pcm_media_hw_free(struct snd_pcm_substream *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

static struct snd_pcm_ops sst_platform_ops = {
	.open = sst_platform_media_open,
	.close = sst_platform_media_close,
	.ioctl = snd_pcm_lib_ioctl,
	.prepare = sst_platform_pcm_media_prepare,
	.trigger = sst_platform_pcm_media_trigger,
	.pointer = sst_platform_pcm_media_pointer,
	.hw_params = sst_platform_pcm_media_hw_params,
	.hw_free = sst_platform_pcm_media_hw_free,
};

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_pcm *pcm = rtd->pcm;
	int retval = 0;

	pr_debug("sst_pcm_new called\n");
	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
			pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		retval =  snd_pcm_lib_preallocate_pages_for_all(pcm,
			SNDRV_DMA_TYPE_CONTINUOUS,
			snd_dma_continuous_data(GFP_KERNEL),
			SST_MIN_BUFFER, SST_MAX_BUFFER);
		if (retval) {
			pr_err("dma buffer allocationf fail\n");
			return retval;
		}
	}
	return retval;
}

static struct snd_soc_platform_driver sst_soc_platform_drv = {
	.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)
{
	int ret;

	pr_debug("sst_platform_probe called\n");
	sst = NULL;
	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	*
0cd5751a	4	* Copyright (C) 2010-2013 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>
a4b12990	30	#include "sst-mfld-platform.h"
d927fdae	31
4b68b4e1	32	struct sst_device *sst;
03c33042	33	static DEFINE_MUTEX(sst_lock);
4b68b4e1	34	extern struct snd_compr_ops sst_platform_compr_ops;
03c33042 VK	35
	36	int sst_register_dsp(struct sst_device *dev)
	37	{
656a22a1 TI	38	if (WARN_ON(!dev))
656a22a1 TI	39	return -EINVAL;
03c33042 VK	40	if (!try_module_get(dev->dev->driver->owner))
	41	return -ENODEV;
	42	mutex_lock(&sst_lock);
	43	if (sst) {
	44	pr_err("we already have a device %s\n", sst->name);
	45	module_put(dev->dev->driver->owner);
	46	mutex_unlock(&sst_lock);
	47	return -EEXIST;
	48	}
	49	pr_debug("registering device %s\n", dev->name);
	50	sst = dev;
	51	mutex_unlock(&sst_lock);
	52	return 0;
	53	}
	54	EXPORT_SYMBOL_GPL(sst_register_dsp);
	55
	56	int sst_unregister_dsp(struct sst_device *dev)
	57	{
656a22a1 TI	58	if (WARN_ON(!dev))
656a22a1 TI	59	return -EINVAL;
03c33042 VK	60	if (dev != sst)
	61	return -EINVAL;
	62
	63	mutex_lock(&sst_lock);
	64
	65	if (!sst) {
	66	mutex_unlock(&sst_lock);
	67	return -EIO;
	68	}
	69
	70	module_put(sst->dev->driver->owner);
	71	pr_debug("unreg %s\n", sst->name);
	72	sst = NULL;
	73	mutex_unlock(&sst_lock);
	74	return 0;
	75	}
	76	EXPORT_SYMBOL_GPL(sst_unregister_dsp);
	77
d927fdae VK	78	static struct snd_pcm_hardware sst_platform_pcm_hw = {
	79	.info = (SNDRV_PCM_INFO_INTERLEAVED \|
	80	SNDRV_PCM_INFO_DOUBLE \|
	81	SNDRV_PCM_INFO_PAUSE \|
	82	SNDRV_PCM_INFO_RESUME \|
	83	SNDRV_PCM_INFO_MMAP\|
	84	SNDRV_PCM_INFO_MMAP_VALID \|
	85	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	86	SNDRV_PCM_INFO_SYNC_START),
d927fdae VK	87	.buffer_bytes_max = SST_MAX_BUFFER,
	88	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	89	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	90	.periods_min = SST_MIN_PERIODS,
	91	.periods_max = SST_MAX_PERIODS,
	92	.fifo_size = SST_FIFO_SIZE,
	93	};
	94
	95	/* MFLD - MSIC */
d1b73287	96	static struct snd_soc_dai_driver sst_platform_dai[] = {
d927fdae	97	{
0cac6fc3	98	.name = "media-cpu-dai",
d927fdae VK	99	.id = 0,
	100	.playback = {
	101	.channels_min = SST_STEREO,
	102	.channels_max = SST_STEREO,
	103	.rates = SNDRV_PCM_RATE_48000,
	104	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	105	},
a7bffdf7 HP	106	.capture = {
	107	.channels_min = 1,
	108	.channels_max = 5,
	109	.rates = SNDRV_PCM_RATE_48000,
	110	.formats = SNDRV_PCM_FMTBIT_S24_LE,
d927fdae VK	111	},
d927fdae VK	112	},
c514a911 VK	113	{
	114	.name = "Compress-cpu-dai",
	115	.compress_dai = 1,
	116	.playback = {
	117	.channels_min = SST_STEREO,
	118	.channels_max = SST_STEREO,
	119	.rates = SNDRV_PCM_RATE_44100\|SNDRV_PCM_RATE_48000,
	120	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	121	},
	122	},
d927fdae	123	};
5c68536f	124
d927fdae	125	/* helper functions */
4496ffab	126	void sst_set_stream_status(struct sst_runtime_stream *stream,
5c68536f HP	127	int state)
5c68536f HP	128	{
d89b0a13 LG	129	unsigned long flags;
d89b0a13 LG	130	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	131	stream->stream_status = state;
d89b0a13	132	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	133	}
	134
	135	static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
	136	{
	137	int state;
d89b0a13	138	unsigned long flags;
5c68536f	139
d89b0a13	140	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	141	state = stream->stream_status;
d89b0a13	142	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	143	return state;
	144	}
	145
	146	static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
03c33042	147	struct sst_pcm_params *param)
5c68536f HP	148	{
5c68536f HP	149
03c33042 VK	150	param->codec = SST_CODEC_TYPE_PCM;
	151	param->num_chan = (u8) substream->runtime->channels;
	152	param->pcm_wd_sz = substream->runtime->sample_bits;
	153	param->reserved = 0;
	154	param->sfreq = substream->runtime->rate;
	155	param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	156	param->period_count = substream->runtime->period_size;
	157	param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
	158	pr_debug("period_cnt = %d\n", param->period_count);
	159	pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
5c68536f HP	160	}
5c68536f HP	161
d927fdae VK	162	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
	163	{
	164	struct sst_runtime_stream *stream =
	165	substream->runtime->private_data;
03c33042 VK	166	struct sst_pcm_params param = {0};
03c33042 VK	167	struct sst_stream_params str_params = {0};
d927fdae VK	168	int ret_val;
	169
	170	/* set codec params and inform SST driver the same */
5c68536f	171	sst_fill_pcm_params(substream, &param);
d927fdae	172	substream->runtime->dma_area = substream->dma_buffer.area;
d927fdae	173	str_params.sparams = param;
03c33042	174	str_params.codec = param.codec;
d927fdae VK	175	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	176	str_params.ops = STREAM_OPS_PLAYBACK;
	177	str_params.device_type = substream->pcm->device + 1;
	178	pr_debug("Playbck stream,Device %d\n",
	179	substream->pcm->device);
	180	} else {
	181	str_params.ops = STREAM_OPS_CAPTURE;
	182	str_params.device_type = SND_SST_DEVICE_CAPTURE;
	183	pr_debug("Capture stream,Device %d\n",
	184	substream->pcm->device);
	185	}
03c33042	186	ret_val = stream->ops->open(&str_params);
d927fdae VK	187	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	188	if (ret_val < 0)
	189	return ret_val;
	190
	191	stream->stream_info.str_id = ret_val;
	192	pr_debug("str id : %d\n", stream->stream_info.str_id);
d927fdae VK	193	return ret_val;
	194	}
	195
d927fdae VK	196	static void sst_period_elapsed(void *mad_substream)
	197	{
	198	struct snd_pcm_substream *substream = mad_substream;
	199	struct sst_runtime_stream *stream;
5c68536f	200	int status;
d927fdae VK	201
	202	if (!substream \|\| !substream->runtime)
	203	return;
	204	stream = substream->runtime->private_data;
	205	if (!stream)
	206	return;
5c68536f HP	207	status = sst_get_stream_status(stream);
5c68536f HP	208	if (status != SST_PLATFORM_RUNNING)
d927fdae	209	return;
d927fdae	210	snd_pcm_period_elapsed(substream);
d927fdae VK	211	}
	212
	213	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	214	{
	215	struct sst_runtime_stream *stream =
	216	substream->runtime->private_data;
	217	int ret_val;
	218
	219	pr_debug("setting buffer ptr param\n");
5c68536f	220	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae VK	221	stream->stream_info.period_elapsed = sst_period_elapsed;
	222	stream->stream_info.mad_substream = substream;
	223	stream->stream_info.buffer_ptr = 0;
	224	stream->stream_info.sfreq = substream->runtime->rate;
03c33042	225	ret_val = stream->ops->device_control(
a211701e	226	SST_SND_STREAM_INIT, &stream->stream_info);
d927fdae VK	227	if (ret_val)
	228	pr_err("control_set ret error %d\n", ret_val);
	229	return ret_val;
	230
	231	}
	232	/* end -- helper functions */
	233
0cac6fc3	234	static int sst_platform_media_open(struct snd_pcm_substream *substream)
d927fdae	235	{
22be504a	236	struct snd_pcm_runtime *runtime = substream->runtime;
d927fdae	237	struct sst_runtime_stream *stream;
c45471ea	238	int ret_val;
d927fdae	239
0cac6fc3	240	pr_debug("sst_platform_media_open called\n");
22be504a LG	241
22be504a LG	242	snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
283e42e0 LG	243	ret_val = snd_pcm_hw_constraint_integer(runtime,
	244	SNDRV_PCM_HW_PARAM_PERIODS);
	245	if (ret_val < 0)
	246	return ret_val;
22be504a	247
d927fdae VK	248	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	249	if (!stream)
	250	return -ENOMEM;
d927fdae	251	spin_lock_init(&stream->status_lock);
03c33042 VK	252
	253	/* get the sst ops */
	254	mutex_lock(&sst_lock);
	255	if (!sst) {
	256	pr_err("no device available to run\n");
	257	mutex_unlock(&sst_lock);
d927fdae	258	kfree(stream);
03c33042	259	return -ENODEV;
d927fdae	260	}
03c33042 VK	261	if (!try_module_get(sst->dev->driver->owner)) {
03c33042 VK	262	mutex_unlock(&sst_lock);
83a3fd3c	263	kfree(stream);
03c33042	264	return -ENODEV;
d927fdae	265	}
03c33042 VK	266	stream->ops = sst->ops;
	267	mutex_unlock(&sst_lock);
	268
	269	stream->stream_info.str_id = 0;
	270	sst_set_stream_status(stream, SST_PLATFORM_INIT);
	271	stream->stream_info.mad_substream = substream;
	272	/* allocate memory for SST API set */
d927fdae	273	runtime->private_data = stream;
283e42e0 LG	274
283e42e0 LG	275	return 0;
d927fdae VK	276	}
d927fdae VK	277
0cac6fc3	278	static int sst_platform_media_close(struct snd_pcm_substream *substream)
d927fdae VK	279	{
	280	struct sst_runtime_stream *stream;
	281	int ret_val = 0, str_id;
	282
0cac6fc3	283	pr_debug("sst_platform_media_close called\n");
d927fdae VK	284	stream = substream->runtime->private_data;
d927fdae VK	285	str_id = stream->stream_info.str_id;
d927fdae	286	if (str_id)
03c33042 VK	287	ret_val = stream->ops->close(str_id);
03c33042 VK	288	module_put(sst->dev->driver->owner);
d927fdae VK	289	kfree(stream);
	290	return ret_val;
	291	}
	292
0cac6fc3	293	static int sst_platform_pcm_media_prepare(struct snd_pcm_substream *substream)
d927fdae VK	294	{
	295	struct sst_runtime_stream *stream;
	296	int ret_val = 0, str_id;
	297
0cac6fc3	298	pr_debug("sst_platform_pcm_media_prepare called\n");
d927fdae VK	299	stream = substream->runtime->private_data;
	300	str_id = stream->stream_info.str_id;
	301	if (stream->stream_info.str_id) {
03c33042 VK	302	ret_val = stream->ops->device_control(
03c33042 VK	303	SST_SND_DROP, &str_id);
d927fdae VK	304	return ret_val;
	305	}
	306
	307	ret_val = sst_platform_alloc_stream(substream);
	308	if (ret_val < 0)
	309	return ret_val;
	310	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	311	"%d", stream->stream_info.str_id);
	312
	313	ret_val = sst_platform_init_stream(substream);
	314	if (ret_val)
	315	return ret_val;
	316	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	317	return ret_val;
	318	}
	319
0cac6fc3	320	static int sst_platform_pcm_media_trigger(struct snd_pcm_substream *substream,
d927fdae VK	321	int cmd)
	322	{
	323	int ret_val = 0, str_id;
	324	struct sst_runtime_stream *stream;
a211701e	325	int str_cmd, status;
d927fdae	326
0cac6fc3	327	pr_debug("sst_platform_pcm_media_trigger called\n");
d927fdae	328	stream = substream->runtime->private_data;
d927fdae	329	str_id = stream->stream_info.str_id;
d927fdae VK	330	switch (cmd) {
	331	case SNDRV_PCM_TRIGGER_START:
	332	pr_debug("sst: Trigger Start\n");
a211701e HP	333	str_cmd = SST_SND_START;
a211701e HP	334	status = SST_PLATFORM_RUNNING;
d927fdae VK	335	stream->stream_info.mad_substream = substream;
	336	break;
	337	case SNDRV_PCM_TRIGGER_STOP:
	338	pr_debug("sst: in stop\n");
a211701e HP	339	str_cmd = SST_SND_DROP;
a211701e HP	340	status = SST_PLATFORM_DROPPED;
d927fdae VK	341	break;
	342	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	343	pr_debug("sst: in pause\n");
a211701e HP	344	str_cmd = SST_SND_PAUSE;
a211701e HP	345	status = SST_PLATFORM_PAUSED;
d927fdae VK	346	break;
	347	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	348	pr_debug("sst: in pause release\n");
a211701e HP	349	str_cmd = SST_SND_RESUME;
a211701e HP	350	status = SST_PLATFORM_RUNNING;
d927fdae VK	351	break;
d927fdae VK	352	default:
a211701e	353	return -EINVAL;
d927fdae	354	}
03c33042	355	ret_val = stream->ops->device_control(str_cmd, &str_id);
a211701e HP	356	if (!ret_val)
	357	sst_set_stream_status(stream, status);
	358
d927fdae VK	359	return ret_val;
	360	}
	361
	362
0cac6fc3	363	static snd_pcm_uframes_t sst_platform_pcm_media_pointer
d927fdae VK	364	(struct snd_pcm_substream *substream)
	365	{
	366	struct sst_runtime_stream *stream;
5c68536f	367	int ret_val, status;
d927fdae VK	368	struct pcm_stream_info *str_info;
d927fdae VK	369
d927fdae	370	stream = substream->runtime->private_data;
5c68536f HP	371	status = sst_get_stream_status(stream);
5c68536f HP	372	if (status == SST_PLATFORM_INIT)
d927fdae	373	return 0;
d927fdae	374	str_info = &stream->stream_info;
03c33042	375	ret_val = stream->ops->device_control(
d927fdae VK	376	SST_SND_BUFFER_POINTER, str_info);
	377	if (ret_val) {
	378	pr_err("sst: error code = %d\n", ret_val);
	379	return ret_val;
	380	}
d927fdae VK	381	return stream->stream_info.buffer_ptr;
	382	}
	383
0cac6fc3	384	static int sst_platform_pcm_media_hw_params(struct snd_pcm_substream *substream,
5b499f8b VK	385	struct snd_pcm_hw_params *params)
	386	{
	387	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	388	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	389
	390	return 0;
	391	}
d927fdae	392
0cac6fc3	393	static int sst_platform_pcm_media_hw_free(struct snd_pcm_substream *substream)
9ab88434	394	{
	395	return snd_pcm_lib_free_pages(substream);
	396	}
	397
d927fdae	398	static struct snd_pcm_ops sst_platform_ops = {
0cac6fc3 VK	399	.open = sst_platform_media_open,
0cac6fc3 VK	400	.close = sst_platform_media_close,
d927fdae	401	.ioctl = snd_pcm_lib_ioctl,
0cac6fc3 VK	402	.prepare = sst_platform_pcm_media_prepare,
	403	.trigger = sst_platform_pcm_media_trigger,
	404	.pointer = sst_platform_pcm_media_pointer,
	405	.hw_params = sst_platform_pcm_media_hw_params,
	406	.hw_free = sst_platform_pcm_media_hw_free,
d927fdae VK	407	};
	408
	409	static void sst_pcm_free(struct snd_pcm *pcm)
	410	{
	411	pr_debug("sst_pcm_free called\n");
	412	snd_pcm_lib_preallocate_free_for_all(pcm);
	413	}
	414
8faa8c1a	415	static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
d927fdae	416	{
552d1ef6	417	struct snd_pcm *pcm = rtd->pcm;
d927fdae VK	418	int retval = 0;
	419
	420	pr_debug("sst_pcm_new called\n");
25e9e756 JE	421	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream \|\|
25e9e756 JE	422	pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
d927fdae VK	423	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
	424	SNDRV_DMA_TYPE_CONTINUOUS,
	425	snd_dma_continuous_data(GFP_KERNEL),
	426	SST_MIN_BUFFER, SST_MAX_BUFFER);
	427	if (retval) {
	428	pr_err("dma buffer allocationf fail\n");
	429	return retval;
	430	}
	431	}
d927fdae VK	432	return retval;
d927fdae VK	433	}
c514a911	434
8faa8c1a	435	static struct snd_soc_platform_driver sst_soc_platform_drv = {
d927fdae	436	.ops = &sst_platform_ops,
c514a911	437	.compr_ops = &sst_platform_compr_ops,
d927fdae VK	438	.pcm_new = sst_pcm_new,
	439	.pcm_free = sst_pcm_free,
	440	};
	441
2b4c78df VK	442	static const struct snd_soc_component_driver sst_component = {
	443	.name = "sst",
	444	};
	445
	446
d927fdae VK	447	static int sst_platform_probe(struct platform_device *pdev)
	448	{
	449	int ret;
	450
	451	pr_debug("sst_platform_probe called\n");
03c33042	452	sst = NULL;
d927fdae VK	453	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	454	if (ret) {
	455	pr_err("registering soc platform failed\n");
	456	return ret;
	457	}
5c68536f	458
b1c36861	459	ret = snd_soc_register_component(&pdev->dev, &sst_component,
d927fdae VK	460	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	461	if (ret) {
	462	pr_err("registering cpu dais failed\n");
	463	snd_soc_unregister_platform(&pdev->dev);
	464	}
	465	return ret;
	466	}
	467
	468	static int sst_platform_remove(struct platform_device *pdev)
	469	{
	470
b1c36861	471	snd_soc_unregister_component(&pdev->dev);
d927fdae	472	snd_soc_unregister_platform(&pdev->dev);
25985edc	473	pr_debug("sst_platform_remove success\n");
d927fdae VK	474	return 0;
	475	}
	476
	477	static struct platform_driver sst_platform_driver = {
	478	.driver = {
a4b12990	479	.name = "sst-mfld-platform",
d927fdae VK	480	.owner = THIS_MODULE,
	481	},
	482	.probe = sst_platform_probe,
	483	.remove = sst_platform_remove,
	484	};
	485
29515d62	486	module_platform_driver(sst_platform_driver);
d927fdae VK	487
	488	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	489	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	490	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	491	MODULE_LICENSE("GPL v2");
a4b12990	492	MODULE_ALIAS("platform:sst-mfld-platform");