[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,
	},
},
{
	.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->control_set(SST_SND_ALLOC, &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->control_set(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;
	/* 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");
		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->control_set(
					SST_SND_FREE, &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->control_set(
					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;

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

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