[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)
{
	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);

	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);
	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>
	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	{
d89b0a13 LG	119	unsigned long flags;
d89b0a13 LG	120	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	121	stream->stream_status = state;
d89b0a13	122	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	123	}
	124
	125	static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
	126	{
	127	int state;
d89b0a13	128	unsigned long flags;
5c68536f	129
d89b0a13	130	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	131	state = stream->stream_status;
d89b0a13	132	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	133	return state;
	134	}
	135
	136	static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
	137	struct snd_sst_stream_params *param)
	138	{
	139
	140	param->uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
	141	param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
	142	param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
	143	param->uc.pcm_params.reserved = 0;
	144	param->uc.pcm_params.sfreq = substream->runtime->rate;
	145	param->uc.pcm_params.ring_buffer_size =
	146	snd_pcm_lib_buffer_bytes(substream);
	147	param->uc.pcm_params.period_count = substream->runtime->period_size;
	148	param->uc.pcm_params.ring_buffer_addr =
	149	virt_to_phys(substream->dma_buffer.area);
	150	pr_debug("period_cnt = %d\n", param->uc.pcm_params.period_count);
	151	pr_debug("sfreq= %d, wd_sz = %d\n",
	152	param->uc.pcm_params.sfreq, param->uc.pcm_params.pcm_wd_sz);
	153	}
	154
d927fdae VK	155	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
	156	{
	157	struct sst_runtime_stream *stream =
	158	substream->runtime->private_data;
	159	struct snd_sst_stream_params param = {{{0,},},};
	160	struct snd_sst_params str_params = {0};
	161	int ret_val;
	162
	163	/* set codec params and inform SST driver the same */
5c68536f	164	sst_fill_pcm_params(substream, &param);
d927fdae	165	substream->runtime->dma_area = substream->dma_buffer.area;
d927fdae	166	str_params.sparams = param;
5c68536f	167	str_params.codec = param.uc.pcm_params.codec;
d927fdae VK	168	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	169	str_params.ops = STREAM_OPS_PLAYBACK;
	170	str_params.device_type = substream->pcm->device + 1;
	171	pr_debug("Playbck stream,Device %d\n",
	172	substream->pcm->device);
	173	} else {
	174	str_params.ops = STREAM_OPS_CAPTURE;
	175	str_params.device_type = SND_SST_DEVICE_CAPTURE;
	176	pr_debug("Capture stream,Device %d\n",
	177	substream->pcm->device);
	178	}
a211701e	179	ret_val = stream->sstdrv_ops->pcm_control->open(&str_params);
d927fdae VK	180	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	181	if (ret_val < 0)
	182	return ret_val;
	183
	184	stream->stream_info.str_id = ret_val;
	185	pr_debug("str id : %d\n", stream->stream_info.str_id);
d927fdae VK	186	return ret_val;
	187	}
	188
d927fdae VK	189	static void sst_period_elapsed(void *mad_substream)
	190	{
	191	struct snd_pcm_substream *substream = mad_substream;
	192	struct sst_runtime_stream *stream;
5c68536f	193	int status;
d927fdae VK	194
	195	if (!substream \|\| !substream->runtime)
	196	return;
	197	stream = substream->runtime->private_data;
	198	if (!stream)
	199	return;
5c68536f HP	200	status = sst_get_stream_status(stream);
5c68536f HP	201	if (status != SST_PLATFORM_RUNNING)
d927fdae	202	return;
d927fdae	203	snd_pcm_period_elapsed(substream);
d927fdae VK	204	}
	205
	206	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	207	{
	208	struct sst_runtime_stream *stream =
	209	substream->runtime->private_data;
	210	int ret_val;
	211
	212	pr_debug("setting buffer ptr param\n");
5c68536f	213	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae VK	214	stream->stream_info.period_elapsed = sst_period_elapsed;
	215	stream->stream_info.mad_substream = substream;
	216	stream->stream_info.buffer_ptr = 0;
	217	stream->stream_info.sfreq = substream->runtime->rate;
a211701e HP	218	ret_val = stream->sstdrv_ops->pcm_control->device_control(
a211701e HP	219	SST_SND_STREAM_INIT, &stream->stream_info);
d927fdae VK	220	if (ret_val)
	221	pr_err("control_set ret error %d\n", ret_val);
	222	return ret_val;
	223
	224	}
	225	/* end -- helper functions */
	226
	227	static int sst_platform_open(struct snd_pcm_substream *substream)
	228	{
22be504a	229	struct snd_pcm_runtime *runtime = substream->runtime;
d927fdae VK	230	struct sst_runtime_stream *stream;
	231	int ret_val = 0;
	232
	233	pr_debug("sst_platform_open called\n");
22be504a LG	234
	235	snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
	236
d927fdae VK	237	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	238	if (!stream)
	239	return -ENOMEM;
d927fdae VK	240	spin_lock_init(&stream->status_lock);
d927fdae VK	241	stream->stream_info.str_id = 0;
5c68536f	242	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae VK	243	stream->stream_info.mad_substream = substream;
	244	/* allocate memory for SST API set */
	245	stream->sstdrv_ops = kzalloc(sizeof(*stream->sstdrv_ops),
	246	GFP_KERNEL);
	247	if (!stream->sstdrv_ops) {
	248	pr_err("sst: mem allocation for ops fail\n");
	249	kfree(stream);
	250	return -ENOMEM;
	251	}
	252	stream->sstdrv_ops->vendor_id = MSIC_VENDOR_ID;
0d1d7ce9	253	stream->sstdrv_ops->module_name = SST_CARD_NAMES;
d927fdae VK	254	/* registering with SST driver to get access to SST APIs to use */
	255	ret_val = register_sst_card(stream->sstdrv_ops);
	256	if (ret_val) {
	257	pr_err("sst: sst card registration failed\n");
83a3fd3c LG	258	kfree(stream->sstdrv_ops);
83a3fd3c LG	259	kfree(stream);
d927fdae VK	260	return ret_val;
	261	}
	262	runtime->private_data = stream;
	263	return snd_pcm_hw_constraint_integer(runtime,
	264	SNDRV_PCM_HW_PARAM_PERIODS);
	265	}
	266
	267	static int sst_platform_close(struct snd_pcm_substream *substream)
	268	{
	269	struct sst_runtime_stream *stream;
	270	int ret_val = 0, str_id;
	271
	272	pr_debug("sst_platform_close called\n");
d927fdae VK	273	stream = substream->runtime->private_data;
d927fdae VK	274	str_id = stream->stream_info.str_id;
d927fdae	275	if (str_id)
a211701e	276	ret_val = stream->sstdrv_ops->pcm_control->close(str_id);
fb631eae	277	unregister_sst_card(stream->sstdrv_ops);
d927fdae VK	278	kfree(stream->sstdrv_ops);
	279	kfree(stream);
	280	return ret_val;
	281	}
	282
	283	static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
	284	{
	285	struct sst_runtime_stream *stream;
	286	int ret_val = 0, str_id;
	287
	288	pr_debug("sst_platform_pcm_prepare called\n");
d927fdae VK	289	stream = substream->runtime->private_data;
	290	str_id = stream->stream_info.str_id;
	291	if (stream->stream_info.str_id) {
a211701e	292	ret_val = stream->sstdrv_ops->pcm_control->device_control(
d927fdae VK	293	SST_SND_DROP, &str_id);
	294	return ret_val;
	295	}
	296
	297	ret_val = sst_platform_alloc_stream(substream);
	298	if (ret_val < 0)
	299	return ret_val;
	300	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	301	"%d", stream->stream_info.str_id);
	302
	303	ret_val = sst_platform_init_stream(substream);
	304	if (ret_val)
	305	return ret_val;
	306	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	307	return ret_val;
	308	}
	309
	310	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
	311	int cmd)
	312	{
	313	int ret_val = 0, str_id;
	314	struct sst_runtime_stream *stream;
a211701e	315	int str_cmd, status;
d927fdae VK	316
d927fdae VK	317	pr_debug("sst_platform_pcm_trigger called\n");
d927fdae	318	stream = substream->runtime->private_data;
d927fdae	319	str_id = stream->stream_info.str_id;
d927fdae VK	320	switch (cmd) {
	321	case SNDRV_PCM_TRIGGER_START:
	322	pr_debug("sst: Trigger Start\n");
a211701e HP	323	str_cmd = SST_SND_START;
a211701e HP	324	status = SST_PLATFORM_RUNNING;
d927fdae VK	325	stream->stream_info.mad_substream = substream;
	326	break;
	327	case SNDRV_PCM_TRIGGER_STOP:
	328	pr_debug("sst: in stop\n");
a211701e HP	329	str_cmd = SST_SND_DROP;
a211701e HP	330	status = SST_PLATFORM_DROPPED;
d927fdae VK	331	break;
	332	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	333	pr_debug("sst: in pause\n");
a211701e HP	334	str_cmd = SST_SND_PAUSE;
a211701e HP	335	status = SST_PLATFORM_PAUSED;
d927fdae VK	336	break;
	337	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	338	pr_debug("sst: in pause release\n");
a211701e HP	339	str_cmd = SST_SND_RESUME;
a211701e HP	340	status = SST_PLATFORM_RUNNING;
d927fdae VK	341	break;
d927fdae VK	342	default:
a211701e	343	return -EINVAL;
d927fdae	344	}
a211701e HP	345	ret_val = stream->sstdrv_ops->pcm_control->device_control(str_cmd,
	346	&str_id);
	347	if (!ret_val)
	348	sst_set_stream_status(stream, status);
	349
d927fdae VK	350	return ret_val;
	351	}
	352
	353
	354	static snd_pcm_uframes_t sst_platform_pcm_pointer
	355	(struct snd_pcm_substream *substream)
	356	{
	357	struct sst_runtime_stream *stream;
5c68536f	358	int ret_val, status;
d927fdae VK	359	struct pcm_stream_info *str_info;
d927fdae VK	360
d927fdae	361	stream = substream->runtime->private_data;
5c68536f HP	362	status = sst_get_stream_status(stream);
5c68536f HP	363	if (status == SST_PLATFORM_INIT)
d927fdae	364	return 0;
d927fdae	365	str_info = &stream->stream_info;
a211701e	366	ret_val = stream->sstdrv_ops->pcm_control->device_control(
d927fdae VK	367	SST_SND_BUFFER_POINTER, str_info);
	368	if (ret_val) {
	369	pr_err("sst: error code = %d\n", ret_val);
	370	return ret_val;
	371	}
d927fdae VK	372	return stream->stream_info.buffer_ptr;
	373	}
	374
5b499f8b VK	375	static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
	376	struct snd_pcm_hw_params *params)
	377	{
	378	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	379	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	380
	381	return 0;
	382	}
d927fdae	383
9ab88434	384	static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
	385	{
	386	return snd_pcm_lib_free_pages(substream);
	387	}
	388
d927fdae VK	389	static struct snd_pcm_ops sst_platform_ops = {
	390	.open = sst_platform_open,
	391	.close = sst_platform_close,
	392	.ioctl = snd_pcm_lib_ioctl,
	393	.prepare = sst_platform_pcm_prepare,
	394	.trigger = sst_platform_pcm_trigger,
	395	.pointer = sst_platform_pcm_pointer,
5b499f8b	396	.hw_params = sst_platform_pcm_hw_params,
9ab88434	397	.hw_free = sst_platform_pcm_hw_free,
d927fdae VK	398	};
	399
	400	static void sst_pcm_free(struct snd_pcm *pcm)
	401	{
	402	pr_debug("sst_pcm_free called\n");
	403	snd_pcm_lib_preallocate_free_for_all(pcm);
	404	}
	405
552d1ef6	406	int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
d927fdae	407	{
552d1ef6 LG	408	struct snd_soc_dai *dai = rtd->cpu_dai;
552d1ef6 LG	409	struct snd_pcm *pcm = rtd->pcm;
d927fdae VK	410	int retval = 0;
	411
	412	pr_debug("sst_pcm_new called\n");
d927fdae VK	413	if (dai->driver->playback.channels_min \|\|
	414	dai->driver->capture.channels_min) {
	415	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
	416	SNDRV_DMA_TYPE_CONTINUOUS,
	417	snd_dma_continuous_data(GFP_KERNEL),
	418	SST_MIN_BUFFER, SST_MAX_BUFFER);
	419	if (retval) {
	420	pr_err("dma buffer allocationf fail\n");
	421	return retval;
	422	}
	423	}
d927fdae VK	424	return retval;
	425	}
	426	struct snd_soc_platform_driver sst_soc_platform_drv = {
	427	.ops = &sst_platform_ops,
	428	.pcm_new = sst_pcm_new,
	429	.pcm_free = sst_pcm_free,
	430	};
	431
	432	static int sst_platform_probe(struct platform_device *pdev)
	433	{
	434	int ret;
	435
	436	pr_debug("sst_platform_probe called\n");
	437	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	438	if (ret) {
	439	pr_err("registering soc platform failed\n");
	440	return ret;
	441	}
5c68536f	442
d927fdae VK	443	ret = snd_soc_register_dais(&pdev->dev,
	444	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	445	if (ret) {
	446	pr_err("registering cpu dais failed\n");
	447	snd_soc_unregister_platform(&pdev->dev);
	448	}
	449	return ret;
	450	}
	451
	452	static int sst_platform_remove(struct platform_device *pdev)
	453	{
	454
	455	snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
d927fdae	456	snd_soc_unregister_platform(&pdev->dev);
25985edc	457	pr_debug("sst_platform_remove success\n");
d927fdae VK	458	return 0;
	459	}
	460
	461	static struct platform_driver sst_platform_driver = {
	462	.driver = {
	463	.name = "sst-platform",
	464	.owner = THIS_MODULE,
	465	},
	466	.probe = sst_platform_probe,
	467	.remove = sst_platform_remove,
	468	};
	469
	470	static int __init sst_soc_platform_init(void)
	471	{
	472	pr_debug("sst_soc_platform_init called\n");
c2f6fce3	473	return platform_driver_register(&sst_platform_driver);
d927fdae VK	474	}
	475	module_init(sst_soc_platform_init);
	476
	477	static void __exit sst_soc_platform_exit(void)
	478	{
	479	platform_driver_unregister(&sst_platform_driver);
25985edc	480	pr_debug("sst_soc_platform_exit success\n");
d927fdae VK	481	}
	482	module_exit(sst_soc_platform_exit);
	483
	484	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	485	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	486	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	487	MODULE_LICENSE("GPL v2");
f5c6b2aa	488	MODULE_ALIAS("platform:sst-platform");