[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 <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 */
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)
{
	spin_lock(&stream->status_lock);
	stream->stream_status = state;
	spin_unlock(&stream->status_lock);
}

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

	spin_lock(&stream->status_lock);
	state = stream->stream_status;
	spin_unlock(&stream->status_lock);
	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;
	struct sst_runtime_stream *stream;
	int ret_val = 0;

	pr_debug("sst_platform_open called\n");
	runtime = substream->runtime;
	runtime->hw = sst_platform_pcm_hw;
	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 snd_pcm_hw_constraint_integer(runtime,
			 SNDRV_PCM_HW_PARAM_PERIODS);
}

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);
	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 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,
};

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