[deliverable/linux.git] / sound / soc / mid-x86 / sst_platform.c

/*
 *  sst_platform.c - Intel MID Platform driver
 *
 *  Copyright (C) 2010 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.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *
 */
#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 "../../../drivers/staging/intel_sst/intel_sst_ioctl.h"
#include "../../../drivers/staging/intel_sst/intel_sst.h"
#include "sst_platform.h"

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),
	.formats = (SNDRV_PCM_FMTBIT_S16 | SNDRV_PCM_FMTBIT_U16 |
			SNDRV_PCM_FMTBIT_S24 | SNDRV_PCM_FMTBIT_U24 |
			SNDRV_PCM_FMTBIT_S32 | SNDRV_PCM_FMTBIT_U32),
	.rates = (SNDRV_PCM_RATE_8000|
			SNDRV_PCM_RATE_44100 |
			SNDRV_PCM_RATE_48000),
	.rate_min = SST_MIN_RATE,
	.rate_max = SST_MAX_RATE,
	.channels_min =	SST_MIN_CHANNEL,
	.channels_max =	SST_MAX_CHANNEL,
	.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 = "Speaker-cpu-dai",
	.id = 1,
	.playback = {
		.channels_min = SST_MONO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S24_LE,
	},
},
{
	.name = "Vibra1-cpu-dai",
	.id = 2,
	.playback = {
		.channels_min = SST_MONO,
		.channels_max = SST_MONO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S24_LE,
	},
},
{
	.name = "Vibra2-cpu-dai",
	.id = 3,
	.playback = {
		.channels_min = SST_MONO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S24_LE,
	},
},
};

/* helper functions */
static inline 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 snd_sst_stream_params *param)
{

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

static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct snd_sst_stream_params param = {{{0,},},};
	struct snd_sst_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.uc.pcm_params.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->sstdrv_ops->pcm_control->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->sstdrv_ops->pcm_control->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_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sst_runtime_stream *stream;
	int ret_val = 0;

	pr_debug("sst_platform_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);
	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 */
	stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
							GFP_KERNEL);
	if (!stream->sstdrv_ops) {
		pr_err("sst: mem allocation for ops fail\n");
		kfree(stream);
		return -ENOMEM;
	}
	stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
	stream->sstdrv_ops->module_name = SST_CARD_NAMES;
	/* registering with SST driver to get access to SST APIs to use */
	ret_val = register_sst_card(stream->sstdrv_ops);
	if (ret_val) {
		pr_err("sst: sst card registration failed\n");
		kfree(stream->sstdrv_ops);
		kfree(stream);
		return ret_val;
	}
	runtime->private_data = stream;

	return 0;
}

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

	pr_debug("sst_platform_close called\n");
	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (str_id)
		ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
	unregister_sst_card(stream->sstdrv_ops);
	kfree(stream->sstdrv_ops);
	kfree(stream);
	return ret_val;
}

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

	pr_debug("sst_platform_pcm_prepare called\n");
	stream = substream->runtime->private_data;
	str_id = stream->stream_info.str_id;
	if (stream->stream_info.str_id) {
		ret_val = stream->sstdrv_ops->pcm_control->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_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.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->sstdrv_ops->pcm_control->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->sstdrv_ops->pcm_control->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_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_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_open,
	.close = sst_platform_close,
	.ioctl = snd_pcm_lib_ioctl,
	.prepare = sst_platform_pcm_prepare,
	.trigger = sst_platform_pcm_trigger,
	.pointer = sst_platform_pcm_pointer,
	.hw_params = sst_platform_pcm_hw_params,
	.hw_free = sst_platform_pcm_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);
}

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;

	pr_debug("sst_pcm_new called\n");
	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_KERNEL),
			SST_MIN_BUFFER, SST_MAX_BUFFER);
		if (retval) {
			pr_err("dma buffer allocationf fail\n");
			return retval;
		}
	}
	return retval;
}
struct snd_soc_platform_driver sst_soc_platform_drv = {
	.ops		= &sst_platform_ops,
	.pcm_new	= sst_pcm_new,
	.pcm_free	= sst_pcm_free,
};

static int sst_platform_probe(struct platform_device *pdev)
{
	int ret;

	pr_debug("sst_platform_probe called\n");
	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_dais(&pdev->dev,
				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_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
	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-platform",
		.owner		= THIS_MODULE,
	},
	.probe		= sst_platform_probe,
	.remove		= sst_platform_remove,
};

static int __init sst_soc_platform_init(void)
{
	pr_debug("sst_soc_platform_init called\n");
	return platform_driver_register(&sst_platform_driver);
}
module_init(sst_soc_platform_init);

static void __exit sst_soc_platform_exit(void)
{
	platform_driver_unregister(&sst_platform_driver);
	pr_debug("sst_soc_platform_exit success\n");
}
module_exit(sst_soc_platform_exit);

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-platform");
Commit	Line	Data
d927fdae VK	1	/*
	2	* sst_platform.c - Intel MID Platform driver
	3	*
	4	* Copyright (C) 2010 Intel Corp
	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	*
	18	* You should have received a copy of the GNU General Public License along
	19	* with this program; if not, write to the Free Software Foundation, Inc.,
	20	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	21	*
	22	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	23	*
	24	*
	25	*/
	26	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	27
	28	#include <linux/slab.h>
	29	#include <linux/io.h>
da155d5b	30	#include <linux/module.h>
d927fdae VK	31	#include <sound/core.h>
	32	#include <sound/pcm.h>
	33	#include <sound/pcm_params.h>
	34	#include <sound/soc.h>
	35	#include "../../../drivers/staging/intel_sst/intel_sst_ioctl.h"
	36	#include "../../../drivers/staging/intel_sst/intel_sst.h"
	37	#include "sst_platform.h"
	38
	39	static struct snd_pcm_hardware sst_platform_pcm_hw = {
	40	.info = (SNDRV_PCM_INFO_INTERLEAVED \|
	41	SNDRV_PCM_INFO_DOUBLE \|
	42	SNDRV_PCM_INFO_PAUSE \|
	43	SNDRV_PCM_INFO_RESUME \|
	44	SNDRV_PCM_INFO_MMAP\|
	45	SNDRV_PCM_INFO_MMAP_VALID \|
	46	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	47	SNDRV_PCM_INFO_SYNC_START),
	48	.formats = (SNDRV_PCM_FMTBIT_S16 \| SNDRV_PCM_FMTBIT_U16 \|
	49	SNDRV_PCM_FMTBIT_S24 \| SNDRV_PCM_FMTBIT_U24 \|
	50	SNDRV_PCM_FMTBIT_S32 \| SNDRV_PCM_FMTBIT_U32),
	51	.rates = (SNDRV_PCM_RATE_8000\|
	52	SNDRV_PCM_RATE_44100 \|
	53	SNDRV_PCM_RATE_48000),
	54	.rate_min = SST_MIN_RATE,
	55	.rate_max = SST_MAX_RATE,
	56	.channels_min = SST_MIN_CHANNEL,
	57	.channels_max = SST_MAX_CHANNEL,
	58	.buffer_bytes_max = SST_MAX_BUFFER,
	59	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	60	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	61	.periods_min = SST_MIN_PERIODS,
	62	.periods_max = SST_MAX_PERIODS,
	63	.fifo_size = SST_FIFO_SIZE,
	64	};
	65
	66	/* MFLD - MSIC */
d1b73287	67	static struct snd_soc_dai_driver sst_platform_dai[] = {
d927fdae VK	68	{
	69	.name = "Headset-cpu-dai",
	70	.id = 0,
	71	.playback = {
	72	.channels_min = SST_STEREO,
	73	.channels_max = SST_STEREO,
	74	.rates = SNDRV_PCM_RATE_48000,
	75	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	76	},
a7bffdf7 HP	77	.capture = {
	78	.channels_min = 1,
	79	.channels_max = 5,
	80	.rates = SNDRV_PCM_RATE_48000,
	81	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	82	},
d927fdae VK	83	},
	84	{
	85	.name = "Speaker-cpu-dai",
	86	.id = 1,
	87	.playback = {
	88	.channels_min = SST_MONO,
	89	.channels_max = SST_STEREO,
	90	.rates = SNDRV_PCM_RATE_48000,
	91	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	92	},
	93	},
	94	{
	95	.name = "Vibra1-cpu-dai",
	96	.id = 2,
	97	.playback = {
	98	.channels_min = SST_MONO,
	99	.channels_max = SST_MONO,
	100	.rates = SNDRV_PCM_RATE_48000,
	101	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	102	},
	103	},
	104	{
	105	.name = "Vibra2-cpu-dai",
	106	.id = 3,
	107	.playback = {
	108	.channels_min = SST_MONO,
	109	.channels_max = SST_STEREO,
	110	.rates = SNDRV_PCM_RATE_48000,
	111	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	112	},
	113	},
	114	};
5c68536f	115
d927fdae	116	/* helper functions */
5c68536f HP	117	static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
	118	int state)
	119	{
d89b0a13 LG	120	unsigned long flags;
d89b0a13 LG	121	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	122	stream->stream_status = state;
d89b0a13	123	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	124	}
	125
	126	static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
	127	{
	128	int state;
d89b0a13	129	unsigned long flags;
5c68536f	130
d89b0a13	131	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	132	state = stream->stream_status;
d89b0a13	133	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	134	return state;
	135	}
	136
	137	static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
	138	struct snd_sst_stream_params *param)
	139	{
	140
	141	param->uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
	142	param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
	143	param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
	144	param->uc.pcm_params.reserved = 0;
	145	param->uc.pcm_params.sfreq = substream->runtime->rate;
	146	param->uc.pcm_params.ring_buffer_size =
	147	snd_pcm_lib_buffer_bytes(substream);
	148	param->uc.pcm_params.period_count = substream->runtime->period_size;
	149	param->uc.pcm_params.ring_buffer_addr =
	150	virt_to_phys(substream->dma_buffer.area);
	151	pr_debug("period_cnt = %d\n", param->uc.pcm_params.period_count);
	152	pr_debug("sfreq= %d, wd_sz = %d\n",
	153	param->uc.pcm_params.sfreq, param->uc.pcm_params.pcm_wd_sz);
	154	}
	155
d927fdae VK	156	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
	157	{
	158	struct sst_runtime_stream *stream =
	159	substream->runtime->private_data;
	160	struct snd_sst_stream_params param = {{{0,},},};
	161	struct snd_sst_params str_params = {0};
	162	int ret_val;
	163
	164	/* set codec params and inform SST driver the same */
5c68536f	165	sst_fill_pcm_params(substream, &param);
d927fdae	166	substream->runtime->dma_area = substream->dma_buffer.area;
d927fdae	167	str_params.sparams = param;
5c68536f	168	str_params.codec = param.uc.pcm_params.codec;
d927fdae VK	169	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	170	str_params.ops = STREAM_OPS_PLAYBACK;
	171	str_params.device_type = substream->pcm->device + 1;
	172	pr_debug("Playbck stream,Device %d\n",
	173	substream->pcm->device);
	174	} else {
	175	str_params.ops = STREAM_OPS_CAPTURE;
	176	str_params.device_type = SND_SST_DEVICE_CAPTURE;
	177	pr_debug("Capture stream,Device %d\n",
	178	substream->pcm->device);
	179	}
a211701e	180	ret_val = stream->sstdrv_ops->pcm_control->open(&str_params);
d927fdae VK	181	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	182	if (ret_val < 0)
	183	return ret_val;
	184
	185	stream->stream_info.str_id = ret_val;
	186	pr_debug("str id : %d\n", stream->stream_info.str_id);
d927fdae VK	187	return ret_val;
	188	}
	189
d927fdae VK	190	static void sst_period_elapsed(void *mad_substream)
	191	{
	192	struct snd_pcm_substream *substream = mad_substream;
	193	struct sst_runtime_stream *stream;
5c68536f	194	int status;
d927fdae VK	195
	196	if (!substream \|\| !substream->runtime)
	197	return;
	198	stream = substream->runtime->private_data;
	199	if (!stream)
	200	return;
5c68536f HP	201	status = sst_get_stream_status(stream);
5c68536f HP	202	if (status != SST_PLATFORM_RUNNING)
d927fdae	203	return;
d927fdae	204	snd_pcm_period_elapsed(substream);
d927fdae VK	205	}
	206
	207	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	208	{
	209	struct sst_runtime_stream *stream =
	210	substream->runtime->private_data;
	211	int ret_val;
	212
	213	pr_debug("setting buffer ptr param\n");
5c68536f	214	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae VK	215	stream->stream_info.period_elapsed = sst_period_elapsed;
	216	stream->stream_info.mad_substream = substream;
	217	stream->stream_info.buffer_ptr = 0;
	218	stream->stream_info.sfreq = substream->runtime->rate;
a211701e HP	219	ret_val = stream->sstdrv_ops->pcm_control->device_control(
a211701e HP	220	SST_SND_STREAM_INIT, &stream->stream_info);
d927fdae VK	221	if (ret_val)
	222	pr_err("control_set ret error %d\n", ret_val);
	223	return ret_val;
	224
	225	}
	226	/* end -- helper functions */
	227
	228	static int sst_platform_open(struct snd_pcm_substream *substream)
	229	{
22be504a	230	struct snd_pcm_runtime *runtime = substream->runtime;
d927fdae VK	231	struct sst_runtime_stream *stream;
	232	int ret_val = 0;
	233
	234	pr_debug("sst_platform_open called\n");
22be504a LG	235
22be504a LG	236	snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
283e42e0 LG	237	ret_val = snd_pcm_hw_constraint_integer(runtime,
	238	SNDRV_PCM_HW_PARAM_PERIODS);
	239	if (ret_val < 0)
	240	return ret_val;
22be504a	241
d927fdae VK	242	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	243	if (!stream)
	244	return -ENOMEM;
d927fdae VK	245	spin_lock_init(&stream->status_lock);
d927fdae VK	246	stream->stream_info.str_id = 0;
5c68536f	247	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae VK	248	stream->stream_info.mad_substream = substream;
	249	/* allocate memory for SST API set */
	250	stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
	251	GFP_KERNEL);
	252	if (!stream->sstdrv_ops) {
	253	pr_err("sst: mem allocation for ops fail\n");
	254	kfree(stream);
	255	return -ENOMEM;
	256	}
	257	stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
0d1d7ce9	258	stream->sstdrv_ops->module_name = SST_CARD_NAMES;
d927fdae VK	259	/* registering with SST driver to get access to SST APIs to use */
	260	ret_val = register_sst_card(stream->sstdrv_ops);
	261	if (ret_val) {
	262	pr_err("sst: sst card registration failed\n");
83a3fd3c LG	263	kfree(stream->sstdrv_ops);
83a3fd3c LG	264	kfree(stream);
d927fdae VK	265	return ret_val;
	266	}
	267	runtime->private_data = stream;
283e42e0 LG	268
283e42e0 LG	269	return 0;
d927fdae VK	270	}
	271
	272	static int sst_platform_close(struct snd_pcm_substream *substream)
	273	{
	274	struct sst_runtime_stream *stream;
	275	int ret_val = 0, str_id;
	276
	277	pr_debug("sst_platform_close called\n");
d927fdae VK	278	stream = substream->runtime->private_data;
d927fdae VK	279	str_id = stream->stream_info.str_id;
d927fdae	280	if (str_id)
a211701e	281	ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
fb631eae	282	unregister_sst_card(stream->sstdrv_ops);
d927fdae VK	283	kfree(stream->sstdrv_ops);
	284	kfree(stream);
	285	return ret_val;
	286	}
	287
	288	static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
	289	{
	290	struct sst_runtime_stream *stream;
	291	int ret_val = 0, str_id;
	292
	293	pr_debug("sst_platform_pcm_prepare called\n");
d927fdae VK	294	stream = substream->runtime->private_data;
	295	str_id = stream->stream_info.str_id;
	296	if (stream->stream_info.str_id) {
a211701e	297	ret_val = stream->sstdrv_ops->pcm_control->device_control(
d927fdae VK	298	SST_SND_DROP, &str_id);
	299	return ret_val;
	300	}
	301
	302	ret_val = sst_platform_alloc_stream(substream);
	303	if (ret_val < 0)
	304	return ret_val;
	305	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	306	"%d", stream->stream_info.str_id);
	307
	308	ret_val = sst_platform_init_stream(substream);
	309	if (ret_val)
	310	return ret_val;
	311	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	312	return ret_val;
	313	}
	314
	315	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
	316	int cmd)
	317	{
	318	int ret_val = 0, str_id;
	319	struct sst_runtime_stream *stream;
a211701e	320	int str_cmd, status;
d927fdae VK	321
d927fdae VK	322	pr_debug("sst_platform_pcm_trigger called\n");
d927fdae	323	stream = substream->runtime->private_data;
d927fdae	324	str_id = stream->stream_info.str_id;
d927fdae VK	325	switch (cmd) {
	326	case SNDRV_PCM_TRIGGER_START:
	327	pr_debug("sst: Trigger Start\n");
a211701e HP	328	str_cmd = SST_SND_START;
a211701e HP	329	status = SST_PLATFORM_RUNNING;
d927fdae VK	330	stream->stream_info.mad_substream = substream;
	331	break;
	332	case SNDRV_PCM_TRIGGER_STOP:
	333	pr_debug("sst: in stop\n");
a211701e HP	334	str_cmd = SST_SND_DROP;
a211701e HP	335	status = SST_PLATFORM_DROPPED;
d927fdae VK	336	break;
	337	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	338	pr_debug("sst: in pause\n");
a211701e HP	339	str_cmd = SST_SND_PAUSE;
a211701e HP	340	status = SST_PLATFORM_PAUSED;
d927fdae VK	341	break;
	342	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	343	pr_debug("sst: in pause release\n");
a211701e HP	344	str_cmd = SST_SND_RESUME;
a211701e HP	345	status = SST_PLATFORM_RUNNING;
d927fdae VK	346	break;
d927fdae VK	347	default:
a211701e	348	return -EINVAL;
d927fdae	349	}
a211701e HP	350	ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
	351	&str_id);
	352	if (!ret_val)
	353	sst_set_stream_status(stream, status);
	354
d927fdae VK	355	return ret_val;
	356	}
	357
	358
	359	static snd_pcm_uframes_t sst_platform_pcm_pointer
	360	(struct snd_pcm_substream *substream)
	361	{
	362	struct sst_runtime_stream *stream;
5c68536f	363	int ret_val, status;
d927fdae VK	364	struct pcm_stream_info *str_info;
d927fdae VK	365
d927fdae	366	stream = substream->runtime->private_data;
5c68536f HP	367	status = sst_get_stream_status(stream);
5c68536f HP	368	if (status == SST_PLATFORM_INIT)
d927fdae	369	return 0;
d927fdae	370	str_info = &stream->stream_info;
a211701e	371	ret_val = stream->sstdrv_ops->pcm_control->device_control(
d927fdae VK	372	SST_SND_BUFFER_POINTER, str_info);
	373	if (ret_val) {
	374	pr_err("sst: error code = %d\n", ret_val);
	375	return ret_val;
	376	}
d927fdae VK	377	return stream->stream_info.buffer_ptr;
	378	}
	379
5b499f8b VK	380	static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
	381	struct snd_pcm_hw_params *params)
	382	{
	383	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	384	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	385
	386	return 0;
	387	}
d927fdae	388
9ab88434	389	static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
	390	{
	391	return snd_pcm_lib_free_pages(substream);
	392	}
	393
d927fdae VK	394	static struct snd_pcm_ops sst_platform_ops = {
	395	.open = sst_platform_open,
	396	.close = sst_platform_close,
	397	.ioctl = snd_pcm_lib_ioctl,
	398	.prepare = sst_platform_pcm_prepare,
	399	.trigger = sst_platform_pcm_trigger,
	400	.pointer = sst_platform_pcm_pointer,
5b499f8b	401	.hw_params = sst_platform_pcm_hw_params,
9ab88434	402	.hw_free = sst_platform_pcm_hw_free,
d927fdae VK	403	};
	404
	405	static void sst_pcm_free(struct snd_pcm *pcm)
	406	{
	407	pr_debug("sst_pcm_free called\n");
	408	snd_pcm_lib_preallocate_free_for_all(pcm);
	409	}
	410
552d1ef6	411	int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
d927fdae	412	{
552d1ef6 LG	413	struct snd_soc_dai *dai = rtd->cpu_dai;
552d1ef6 LG	414	struct snd_pcm *pcm = rtd->pcm;
d927fdae VK	415	int retval = 0;
	416
	417	pr_debug("sst_pcm_new called\n");
d927fdae VK	418	if (dai->driver->playback.channels_min \|\|
	419	dai->driver->capture.channels_min) {
	420	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
	421	SNDRV_DMA_TYPE_CONTINUOUS,
	422	snd_dma_continuous_data(GFP_KERNEL),
	423	SST_MIN_BUFFER, SST_MAX_BUFFER);
	424	if (retval) {
	425	pr_err("dma buffer allocationf fail\n");
	426	return retval;
	427	}
	428	}
d927fdae VK	429	return retval;
	430	}
	431	struct snd_soc_platform_driver sst_soc_platform_drv = {
	432	.ops = &sst_platform_ops,
	433	.pcm_new = sst_pcm_new,
	434	.pcm_free = sst_pcm_free,
	435	};
	436
	437	static int sst_platform_probe(struct platform_device *pdev)
	438	{
	439	int ret;
	440
	441	pr_debug("sst_platform_probe called\n");
	442	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	443	if (ret) {
	444	pr_err("registering soc platform failed\n");
	445	return ret;
	446	}
5c68536f	447
d927fdae VK	448	ret = snd_soc_register_dais(&pdev->dev,
	449	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	450	if (ret) {
	451	pr_err("registering cpu dais failed\n");
	452	snd_soc_unregister_platform(&pdev->dev);
	453	}
	454	return ret;
	455	}
	456
	457	static int sst_platform_remove(struct platform_device *pdev)
	458	{
	459
	460	snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
d927fdae	461	snd_soc_unregister_platform(&pdev->dev);
25985edc	462	pr_debug("sst_platform_remove success\n");
d927fdae VK	463	return 0;
	464	}
	465
	466	static struct platform_driver sst_platform_driver = {
	467	.driver = {
	468	.name = "sst-platform",
	469	.owner = THIS_MODULE,
	470	},
	471	.probe = sst_platform_probe,
	472	.remove = sst_platform_remove,
	473	};
	474
	475	static int __init sst_soc_platform_init(void)
	476	{
	477	pr_debug("sst_soc_platform_init called\n");
c2f6fce3	478	return platform_driver_register(&sst_platform_driver);
d927fdae VK	479	}
	480	module_init(sst_soc_platform_init);
	481
	482	static void __exit sst_soc_platform_exit(void)
	483	{
	484	platform_driver_unregister(&sst_platform_driver);
25985edc	485	pr_debug("sst_soc_platform_exit success\n");
d927fdae VK	486	}
	487	module_exit(sst_soc_platform_exit);
	488
	489	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	490	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	491	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	492	MODULE_LICENSE("GPL v2");
f5c6b2aa	493	MODULE_ALIAS("platform:sst-platform");