[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 = "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_pcm_params(struct snd_pcm_substream *substream,
				struct sst_pcm_params *param)
{

	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 *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->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_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(str_id);
	module_put(sst->dev->driver->owner);
	kfree(stream);
	return;
}

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->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_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 str_cmd, 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");
		str_cmd = SST_SND_START;
		status = SST_PLATFORM_RUNNING;
		stream->stream_info.arg = 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_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 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 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	{
5106f5a1	98	.name = "Headset-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->num_chan = (u8) substream->runtime->channels;
	151	param->pcm_wd_sz = substream->runtime->sample_bits;
	152	param->reserved = 0;
	153	param->sfreq = substream->runtime->rate;
	154	param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	155	param->period_count = substream->runtime->period_size;
	156	param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
	157	pr_debug("period_cnt = %d\n", param->period_count);
	158	pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
5c68536f HP	159	}
5c68536f HP	160
d927fdae VK	161	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
	162	{
	163	struct sst_runtime_stream *stream =
	164	substream->runtime->private_data;
03c33042 VK	165	struct sst_pcm_params param = {0};
03c33042 VK	166	struct sst_stream_params str_params = {0};
d927fdae VK	167	int ret_val;
	168
	169	/* set codec params and inform SST driver the same */
5c68536f	170	sst_fill_pcm_params(substream, &param);
d927fdae	171	substream->runtime->dma_area = substream->dma_buffer.area;
d927fdae	172	str_params.sparams = param;
03c33042	173	str_params.codec = param.codec;
d927fdae VK	174	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	175	str_params.ops = STREAM_OPS_PLAYBACK;
	176	str_params.device_type = substream->pcm->device + 1;
	177	pr_debug("Playbck stream,Device %d\n",
	178	substream->pcm->device);
	179	} else {
	180	str_params.ops = STREAM_OPS_CAPTURE;
	181	str_params.device_type = SND_SST_DEVICE_CAPTURE;
	182	pr_debug("Capture stream,Device %d\n",
	183	substream->pcm->device);
	184	}
03c33042	185	ret_val = stream->ops->open(&str_params);
d927fdae VK	186	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	187	if (ret_val < 0)
	188	return ret_val;
	189
	190	stream->stream_info.str_id = ret_val;
	191	pr_debug("str id : %d\n", stream->stream_info.str_id);
d927fdae VK	192	return ret_val;
	193	}
	194
9daa5bd3	195	static void sst_period_elapsed(void *arg)
d927fdae	196	{
9daa5bd3	197	struct snd_pcm_substream *substream = arg;
d927fdae	198	struct sst_runtime_stream *stream;
5c68536f	199	int status;
d927fdae VK	200
	201	if (!substream \|\| !substream->runtime)
	202	return;
	203	stream = substream->runtime->private_data;
	204	if (!stream)
	205	return;
5c68536f HP	206	status = sst_get_stream_status(stream);
5c68536f HP	207	if (status != SST_PLATFORM_RUNNING)
d927fdae	208	return;
d927fdae	209	snd_pcm_period_elapsed(substream);
d927fdae VK	210	}
	211
	212	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	213	{
	214	struct sst_runtime_stream *stream =
	215	substream->runtime->private_data;
	216	int ret_val;
	217
	218	pr_debug("setting buffer ptr param\n");
5c68536f	219	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae	220	stream->stream_info.period_elapsed = sst_period_elapsed;
9daa5bd3	221	stream->stream_info.arg = substream;
d927fdae VK	222	stream->stream_info.buffer_ptr = 0;
d927fdae VK	223	stream->stream_info.sfreq = substream->runtime->rate;
03c33042	224	ret_val = stream->ops->device_control(
a211701e	225	SST_SND_STREAM_INIT, &stream->stream_info);
d927fdae VK	226	if (ret_val)
	227	pr_err("control_set ret error %d\n", ret_val);
	228	return ret_val;
	229
	230	}
	231	/* end -- helper functions */
	232
6cc0f4e6 VK	233	static int sst_media_open(struct snd_pcm_substream *substream,
6cc0f4e6 VK	234	struct snd_soc_dai *dai)
d927fdae	235	{
6cc0f4e6	236	int ret_val = 0;
22be504a	237	struct snd_pcm_runtime *runtime = substream->runtime;
d927fdae	238	struct sst_runtime_stream *stream;
22be504a	239
d927fdae VK	240	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	241	if (!stream)
	242	return -ENOMEM;
d927fdae	243	spin_lock_init(&stream->status_lock);
03c33042 VK	244
	245	/* get the sst ops */
	246	mutex_lock(&sst_lock);
6cc0f4e6 VK	247	if (!sst \|\|
6cc0f4e6 VK	248	!try_module_get(sst->dev->driver->owner)) {
03c33042	249	pr_err("no device available to run\n");
6cc0f4e6 VK	250	ret_val = -ENODEV;
6cc0f4e6 VK	251	goto out_ops;
d927fdae	252	}
03c33042 VK	253	stream->ops = sst->ops;
	254	mutex_unlock(&sst_lock);
	255
	256	stream->stream_info.str_id = 0;
6cc0f4e6	257
9daa5bd3	258	stream->stream_info.arg = substream;
03c33042	259	/* allocate memory for SST API set */
d927fdae	260	runtime->private_data = stream;
283e42e0	261
6cc0f4e6 VK	262	/* Make sure, that the period size is always even */
	263	snd_pcm_hw_constraint_step(substream->runtime, 0,
	264	SNDRV_PCM_HW_PARAM_PERIODS, 2);
	265
	266	return snd_pcm_hw_constraint_integer(runtime,
	267	SNDRV_PCM_HW_PARAM_PERIODS);
	268	out_ops:
	269	kfree(stream);
	270	mutex_unlock(&sst_lock);
	271	return ret_val;
d927fdae VK	272	}
d927fdae VK	273
6cc0f4e6 VK	274	static void sst_media_close(struct snd_pcm_substream *substream,
6cc0f4e6 VK	275	struct snd_soc_dai *dai)
d927fdae VK	276	{
	277	struct sst_runtime_stream *stream;
	278	int ret_val = 0, str_id;
	279
d927fdae VK	280	stream = substream->runtime->private_data;
d927fdae VK	281	str_id = stream->stream_info.str_id;
d927fdae	282	if (str_id)
03c33042 VK	283	ret_val = stream->ops->close(str_id);
03c33042 VK	284	module_put(sst->dev->driver->owner);
d927fdae	285	kfree(stream);
6cc0f4e6	286	return;
d927fdae VK	287	}
d927fdae VK	288
6cc0f4e6 VK	289	static int sst_media_prepare(struct snd_pcm_substream *substream,
6cc0f4e6 VK	290	struct snd_soc_dai *dai)
d927fdae VK	291	{
	292	struct sst_runtime_stream *stream;
	293	int ret_val = 0, str_id;
	294
d927fdae VK	295	stream = substream->runtime->private_data;
	296	str_id = stream->stream_info.str_id;
	297	if (stream->stream_info.str_id) {
03c33042 VK	298	ret_val = stream->ops->device_control(
03c33042 VK	299	SST_SND_DROP, &str_id);
d927fdae VK	300	return ret_val;
	301	}
	302
	303	ret_val = sst_platform_alloc_stream(substream);
	304	if (ret_val < 0)
	305	return ret_val;
	306	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	307	"%d", stream->stream_info.str_id);
	308
	309	ret_val = sst_platform_init_stream(substream);
	310	if (ret_val)
	311	return ret_val;
	312	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	313	return ret_val;
	314	}
	315
6cc0f4e6 VK	316	static int sst_media_hw_params(struct snd_pcm_substream *substream,
	317	struct snd_pcm_hw_params *params,
	318	struct snd_soc_dai *dai)
	319	{
	320	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	321	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	322	return 0;
	323	}
	324
	325	static int sst_media_hw_free(struct snd_pcm_substream *substream,
	326	struct snd_soc_dai *dai)
	327	{
	328	return snd_pcm_lib_free_pages(substream);
	329	}
	330
	331	static struct snd_soc_dai_ops sst_media_dai_ops = {
	332	.startup = sst_media_open,
	333	.shutdown = sst_media_close,
	334	.prepare = sst_media_prepare,
	335	.hw_params = sst_media_hw_params,
	336	.hw_free = sst_media_hw_free,
	337	};
	338
	339	static int sst_platform_open(struct snd_pcm_substream *substream)
	340	{
	341	struct snd_pcm_runtime *runtime;
	342
	343	if (substream->pcm->internal)
	344	return 0;
	345
	346	runtime = substream->runtime;
	347	runtime->hw = sst_platform_pcm_hw;
	348	return 0;
	349	}
	350
5106f5a1	351	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
d927fdae VK	352	int cmd)
	353	{
	354	int ret_val = 0, str_id;
	355	struct sst_runtime_stream *stream;
a211701e	356	int str_cmd, status;
d927fdae	357
5106f5a1	358	pr_debug("sst_platform_pcm_trigger called\n");
d927fdae	359	stream = substream->runtime->private_data;
d927fdae	360	str_id = stream->stream_info.str_id;
d927fdae VK	361	switch (cmd) {
	362	case SNDRV_PCM_TRIGGER_START:
	363	pr_debug("sst: Trigger Start\n");
a211701e HP	364	str_cmd = SST_SND_START;
a211701e HP	365	status = SST_PLATFORM_RUNNING;
9daa5bd3	366	stream->stream_info.arg = substream;
d927fdae VK	367	break;
	368	case SNDRV_PCM_TRIGGER_STOP:
	369	pr_debug("sst: in stop\n");
a211701e HP	370	str_cmd = SST_SND_DROP;
a211701e HP	371	status = SST_PLATFORM_DROPPED;
d927fdae VK	372	break;
	373	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	374	pr_debug("sst: in pause\n");
a211701e HP	375	str_cmd = SST_SND_PAUSE;
a211701e HP	376	status = SST_PLATFORM_PAUSED;
d927fdae VK	377	break;
	378	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	379	pr_debug("sst: in pause release\n");
a211701e HP	380	str_cmd = SST_SND_RESUME;
a211701e HP	381	status = SST_PLATFORM_RUNNING;
d927fdae VK	382	break;
d927fdae VK	383	default:
a211701e	384	return -EINVAL;
d927fdae	385	}
03c33042	386	ret_val = stream->ops->device_control(str_cmd, &str_id);
a211701e HP	387	if (!ret_val)
	388	sst_set_stream_status(stream, status);
	389
d927fdae VK	390	return ret_val;
	391	}
	392
	393
5106f5a1	394	static snd_pcm_uframes_t sst_platform_pcm_pointer
d927fdae VK	395	(struct snd_pcm_substream *substream)
	396	{
	397	struct sst_runtime_stream *stream;
5c68536f	398	int ret_val, status;
d927fdae VK	399	struct pcm_stream_info *str_info;
d927fdae VK	400
d927fdae	401	stream = substream->runtime->private_data;
5c68536f HP	402	status = sst_get_stream_status(stream);
5c68536f HP	403	if (status == SST_PLATFORM_INIT)
d927fdae	404	return 0;
d927fdae	405	str_info = &stream->stream_info;
03c33042	406	ret_val = stream->ops->device_control(
d927fdae VK	407	SST_SND_BUFFER_POINTER, str_info);
	408	if (ret_val) {
	409	pr_err("sst: error code = %d\n", ret_val);
	410	return ret_val;
	411	}
6cc0f4e6	412	return str_info->buffer_ptr;
9ab88434	413	}
9ab88434	414
d927fdae	415	static struct snd_pcm_ops sst_platform_ops = {
5106f5a1	416	.open = sst_platform_open,
d927fdae	417	.ioctl = snd_pcm_lib_ioctl,
5106f5a1 VK	418	.trigger = sst_platform_pcm_trigger,
5106f5a1 VK	419	.pointer = sst_platform_pcm_pointer,
d927fdae VK	420	};
	421
	422	static void sst_pcm_free(struct snd_pcm *pcm)
	423	{
	424	pr_debug("sst_pcm_free called\n");
	425	snd_pcm_lib_preallocate_free_for_all(pcm);
	426	}
	427
8faa8c1a	428	static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
d927fdae	429	{
6cc0f4e6	430	struct snd_soc_dai *dai = rtd->cpu_dai;
552d1ef6	431	struct snd_pcm *pcm = rtd->pcm;
d927fdae VK	432	int retval = 0;
d927fdae VK	433
6cc0f4e6 VK	434	if (dai->driver->playback.channels_min \|\|
6cc0f4e6 VK	435	dai->driver->capture.channels_min) {
d927fdae VK	436	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
d927fdae VK	437	SNDRV_DMA_TYPE_CONTINUOUS,
6cc0f4e6	438	snd_dma_continuous_data(GFP_DMA),
d927fdae VK	439	SST_MIN_BUFFER, SST_MAX_BUFFER);
	440	if (retval) {
	441	pr_err("dma buffer allocationf fail\n");
	442	return retval;
	443	}
	444	}
d927fdae VK	445	return retval;
d927fdae VK	446	}
c514a911	447
8faa8c1a	448	static struct snd_soc_platform_driver sst_soc_platform_drv = {
d927fdae	449	.ops = &sst_platform_ops,
c514a911	450	.compr_ops = &sst_platform_compr_ops,
d927fdae VK	451	.pcm_new = sst_pcm_new,
	452	.pcm_free = sst_pcm_free,
	453	};
	454
2b4c78df VK	455	static const struct snd_soc_component_driver sst_component = {
	456	.name = "sst",
	457	};
	458
	459
d927fdae VK	460	static int sst_platform_probe(struct platform_device *pdev)
	461	{
	462	int ret;
	463
	464	pr_debug("sst_platform_probe called\n");
03c33042	465	sst = NULL;
d927fdae VK	466	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	467	if (ret) {
	468	pr_err("registering soc platform failed\n");
	469	return ret;
	470	}
5c68536f	471
b1c36861	472	ret = snd_soc_register_component(&pdev->dev, &sst_component,
d927fdae VK	473	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	474	if (ret) {
	475	pr_err("registering cpu dais failed\n");
	476	snd_soc_unregister_platform(&pdev->dev);
	477	}
	478	return ret;
	479	}
	480
	481	static int sst_platform_remove(struct platform_device *pdev)
	482	{
	483
b1c36861	484	snd_soc_unregister_component(&pdev->dev);
d927fdae	485	snd_soc_unregister_platform(&pdev->dev);
25985edc	486	pr_debug("sst_platform_remove success\n");
d927fdae VK	487	return 0;
	488	}
	489
	490	static struct platform_driver sst_platform_driver = {
	491	.driver = {
a4b12990	492	.name = "sst-mfld-platform",
d927fdae VK	493	.owner = THIS_MODULE,
	494	},
	495	.probe = sst_platform_probe,
	496	.remove = sst_platform_remove,
	497	};
	498
29515d62	499	module_platform_driver(sst_platform_driver);
d927fdae VK	500
	501	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	502	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	503	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	504	MODULE_LICENSE("GPL v2");
a4b12990	505	MODULE_ALIAS("platform:sst-mfld-platform");