[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 "sst_platform.h"

static struct sst_device *sst;
static DEFINE_MUTEX(sst_lock);

int sst_register_dsp(struct sst_device *dev)
{
	BUG_ON(!dev);
	if (!try_module_get(dev->dev->driver->owner))
		return -ENODEV;
	mutex_lock(&sst_lock);
	if (sst) {
		pr_err("we already have a device %s\n", sst->name);
		module_put(dev->dev->driver->owner);
		mutex_unlock(&sst_lock);
		return -EEXIST;
	}
	pr_debug("registering device %s\n", dev->name);
	sst = dev;
	mutex_unlock(&sst_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_register_dsp);

int sst_unregister_dsp(struct sst_device *dev)
{
	BUG_ON(!dev);
	if (dev != sst)
		return -EINVAL;

	mutex_lock(&sst_lock);

	if (!sst) {
		mutex_unlock(&sst_lock);
		return -EIO;
	}

	module_put(sst->dev->driver->owner);
	pr_debug("unreg %s\n", sst->name);
	sst = NULL;
	mutex_unlock(&sst_lock);
	return 0;
}
EXPORT_SYMBOL_GPL(sst_unregister_dsp);

static struct snd_pcm_hardware sst_platform_pcm_hw = {
	.info =	(SNDRV_PCM_INFO_INTERLEAVED |
			SNDRV_PCM_INFO_DOUBLE |
			SNDRV_PCM_INFO_PAUSE |
			SNDRV_PCM_INFO_RESUME |
			SNDRV_PCM_INFO_MMAP|
			SNDRV_PCM_INFO_MMAP_VALID |
			SNDRV_PCM_INFO_BLOCK_TRANSFER |
			SNDRV_PCM_INFO_SYNC_START),
	.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 sst_pcm_params *param)
{

	param->codec = SST_CODEC_TYPE_PCM;
	param->num_chan = (u8) substream->runtime->channels;
	param->pcm_wd_sz = substream->runtime->sample_bits;
	param->reserved = 0;
	param->sfreq = substream->runtime->rate;
	param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	param->period_count = substream->runtime->period_size;
	param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
	pr_debug("period_cnt = %d\n", param->period_count);
	pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
}

static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct sst_pcm_params param = {0};
	struct sst_stream_params str_params = {0};
	int ret_val;

	/* set codec params and inform SST driver the same */
	sst_fill_pcm_params(substream, &param);
	substream->runtime->dma_area = substream->dma_buffer.area;
	str_params.sparams = param;
	str_params.codec =  param.codec;
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		str_params.ops = STREAM_OPS_PLAYBACK;
		str_params.device_type = substream->pcm->device + 1;
		pr_debug("Playbck stream,Device %d\n",
					substream->pcm->device);
	} else {
		str_params.ops = STREAM_OPS_CAPTURE;
		str_params.device_type = SND_SST_DEVICE_CAPTURE;
		pr_debug("Capture stream,Device %d\n",
					substream->pcm->device);
	}
	ret_val = stream->ops->open(&str_params);
	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	if (ret_val < 0)
		return ret_val;

	stream->stream_info.str_id = ret_val;
	pr_debug("str id :  %d\n", stream->stream_info.str_id);
	return ret_val;
}

static void sst_period_elapsed(void *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->ops->device_control(
			SST_SND_STREAM_INIT, &stream->stream_info);
	if (ret_val)
		pr_err("control_set ret error %d\n", ret_val);
	return ret_val;

}
/* end -- helper functions */

static int sst_platform_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sst_runtime_stream *stream;
	int ret_val;

	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);

	/* get the sst ops */
	mutex_lock(&sst_lock);
	if (!sst) {
		pr_err("no device available to run\n");
		mutex_unlock(&sst_lock);
		kfree(stream);
		return -ENODEV;
	}
	if (!try_module_get(sst->dev->driver->owner)) {
		mutex_unlock(&sst_lock);
		kfree(stream);
		return -ENODEV;
	}
	stream->ops = sst->ops;
	mutex_unlock(&sst_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 */
	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->ops->close(str_id);
	module_put(sst->dev->driver->owner);
	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->ops->device_control(
				SST_SND_DROP, &str_id);
		return ret_val;
	}

	ret_val = sst_platform_alloc_stream(substream);
	if (ret_val < 0)
		return ret_val;
	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
			"%d", stream->stream_info.str_id);

	ret_val = sst_platform_init_stream(substream);
	if (ret_val)
		return ret_val;
	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	return ret_val;
}

static int sst_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->ops->device_control(str_cmd, &str_id);
	if (!ret_val)
		sst_set_stream_status(stream, status);

	return ret_val;
}


static snd_pcm_uframes_t sst_platform_pcm_pointer
			(struct snd_pcm_substream *substream)
{
	struct sst_runtime_stream *stream;
	int ret_val, status;
	struct pcm_stream_info *str_info;

	stream = substream->runtime->private_data;
	status = sst_get_stream_status(stream);
	if (status == SST_PLATFORM_INIT)
		return 0;
	str_info = &stream->stream_info;
	ret_val = stream->ops->device_control(
				SST_SND_BUFFER_POINTER, str_info);
	if (ret_val) {
		pr_err("sst: error code = %d\n", ret_val);
		return ret_val;
	}
	return 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);
}

static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_pcm *pcm = rtd->pcm;
	int retval = 0;

	pr_debug("sst_pcm_new called\n");
	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream ||
			pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		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;
}
static 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");
	sst = NULL;
	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	if (ret) {
		pr_err("registering soc platform failed\n");
		return ret;
	}

	ret = snd_soc_register_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,
};

module_platform_driver(sst_platform_driver);

MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:sst-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>
d927fdae VK	35	#include "sst_platform.h"
d927fdae VK	36
03c33042 VK	37	static struct sst_device *sst;
	38	static DEFINE_MUTEX(sst_lock);
	39
	40	int sst_register_dsp(struct sst_device *dev)
	41	{
	42	BUG_ON(!dev);
	43	if (!try_module_get(dev->dev->driver->owner))
	44	return -ENODEV;
	45	mutex_lock(&sst_lock);
	46	if (sst) {
	47	pr_err("we already have a device %s\n", sst->name);
	48	module_put(dev->dev->driver->owner);
	49	mutex_unlock(&sst_lock);
	50	return -EEXIST;
	51	}
	52	pr_debug("registering device %s\n", dev->name);
	53	sst = dev;
	54	mutex_unlock(&sst_lock);
	55	return 0;
	56	}
	57	EXPORT_SYMBOL_GPL(sst_register_dsp);
	58
	59	int sst_unregister_dsp(struct sst_device *dev)
	60	{
	61	BUG_ON(!dev);
	62	if (dev != sst)
	63	return -EINVAL;
	64
	65	mutex_lock(&sst_lock);
	66
	67	if (!sst) {
	68	mutex_unlock(&sst_lock);
	69	return -EIO;
	70	}
	71
	72	module_put(sst->dev->driver->owner);
	73	pr_debug("unreg %s\n", sst->name);
	74	sst = NULL;
	75	mutex_unlock(&sst_lock);
	76	return 0;
	77	}
	78	EXPORT_SYMBOL_GPL(sst_unregister_dsp);
	79
d927fdae VK	80	static struct snd_pcm_hardware sst_platform_pcm_hw = {
	81	.info = (SNDRV_PCM_INFO_INTERLEAVED \|
	82	SNDRV_PCM_INFO_DOUBLE \|
	83	SNDRV_PCM_INFO_PAUSE \|
	84	SNDRV_PCM_INFO_RESUME \|
	85	SNDRV_PCM_INFO_MMAP\|
	86	SNDRV_PCM_INFO_MMAP_VALID \|
	87	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	88	SNDRV_PCM_INFO_SYNC_START),
	89	.formats = (SNDRV_PCM_FMTBIT_S16 \| SNDRV_PCM_FMTBIT_U16 \|
	90	SNDRV_PCM_FMTBIT_S24 \| SNDRV_PCM_FMTBIT_U24 \|
	91	SNDRV_PCM_FMTBIT_S32 \| SNDRV_PCM_FMTBIT_U32),
	92	.rates = (SNDRV_PCM_RATE_8000\|
	93	SNDRV_PCM_RATE_44100 \|
	94	SNDRV_PCM_RATE_48000),
	95	.rate_min = SST_MIN_RATE,
	96	.rate_max = SST_MAX_RATE,
	97	.channels_min = SST_MIN_CHANNEL,
	98	.channels_max = SST_MAX_CHANNEL,
	99	.buffer_bytes_max = SST_MAX_BUFFER,
	100	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	101	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	102	.periods_min = SST_MIN_PERIODS,
	103	.periods_max = SST_MAX_PERIODS,
	104	.fifo_size = SST_FIFO_SIZE,
	105	};
	106
	107	/* MFLD - MSIC */
d1b73287	108	static struct snd_soc_dai_driver sst_platform_dai[] = {
d927fdae VK	109	{
	110	.name = "Headset-cpu-dai",
	111	.id = 0,
	112	.playback = {
	113	.channels_min = SST_STEREO,
	114	.channels_max = SST_STEREO,
	115	.rates = SNDRV_PCM_RATE_48000,
	116	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	117	},
a7bffdf7 HP	118	.capture = {
	119	.channels_min = 1,
	120	.channels_max = 5,
	121	.rates = SNDRV_PCM_RATE_48000,
	122	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	123	},
d927fdae VK	124	},
	125	{
	126	.name = "Speaker-cpu-dai",
	127	.id = 1,
	128	.playback = {
	129	.channels_min = SST_MONO,
	130	.channels_max = SST_STEREO,
	131	.rates = SNDRV_PCM_RATE_48000,
	132	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	133	},
	134	},
	135	{
	136	.name = "Vibra1-cpu-dai",
	137	.id = 2,
	138	.playback = {
	139	.channels_min = SST_MONO,
	140	.channels_max = SST_MONO,
	141	.rates = SNDRV_PCM_RATE_48000,
	142	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	143	},
	144	},
	145	{
	146	.name = "Vibra2-cpu-dai",
	147	.id = 3,
	148	.playback = {
	149	.channels_min = SST_MONO,
	150	.channels_max = SST_STEREO,
	151	.rates = SNDRV_PCM_RATE_48000,
	152	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	153	},
	154	},
	155	};
5c68536f	156
d927fdae	157	/* helper functions */
5c68536f HP	158	static inline void sst_set_stream_status(struct sst_runtime_stream *stream,
	159	int state)
	160	{
d89b0a13 LG	161	unsigned long flags;
d89b0a13 LG	162	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	163	stream->stream_status = state;
d89b0a13	164	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	165	}
	166
	167	static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
	168	{
	169	int state;
d89b0a13	170	unsigned long flags;
5c68536f	171
d89b0a13	172	spin_lock_irqsave(&stream->status_lock, flags);
5c68536f	173	state = stream->stream_status;
d89b0a13	174	spin_unlock_irqrestore(&stream->status_lock, flags);
5c68536f HP	175	return state;
	176	}
	177
	178	static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
03c33042	179	struct sst_pcm_params *param)
5c68536f HP	180	{
5c68536f HP	181
03c33042 VK	182	param->codec = SST_CODEC_TYPE_PCM;
	183	param->num_chan = (u8) substream->runtime->channels;
	184	param->pcm_wd_sz = substream->runtime->sample_bits;
	185	param->reserved = 0;
	186	param->sfreq = substream->runtime->rate;
	187	param->ring_buffer_size = snd_pcm_lib_buffer_bytes(substream);
	188	param->period_count = substream->runtime->period_size;
	189	param->ring_buffer_addr = virt_to_phys(substream->dma_buffer.area);
	190	pr_debug("period_cnt = %d\n", param->period_count);
	191	pr_debug("sfreq= %d, wd_sz = %d\n", param->sfreq, param->pcm_wd_sz);
5c68536f HP	192	}
5c68536f HP	193
d927fdae VK	194	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream)
	195	{
	196	struct sst_runtime_stream *stream =
	197	substream->runtime->private_data;
03c33042 VK	198	struct sst_pcm_params param = {0};
03c33042 VK	199	struct sst_stream_params str_params = {0};
d927fdae VK	200	int ret_val;
	201
	202	/* set codec params and inform SST driver the same */
5c68536f	203	sst_fill_pcm_params(substream, &param);
d927fdae	204	substream->runtime->dma_area = substream->dma_buffer.area;
d927fdae	205	str_params.sparams = param;
03c33042	206	str_params.codec = param.codec;
d927fdae VK	207	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
	208	str_params.ops = STREAM_OPS_PLAYBACK;
	209	str_params.device_type = substream->pcm->device + 1;
	210	pr_debug("Playbck stream,Device %d\n",
	211	substream->pcm->device);
	212	} else {
	213	str_params.ops = STREAM_OPS_CAPTURE;
	214	str_params.device_type = SND_SST_DEVICE_CAPTURE;
	215	pr_debug("Capture stream,Device %d\n",
	216	substream->pcm->device);
	217	}
03c33042	218	ret_val = stream->ops->open(&str_params);
d927fdae VK	219	pr_debug("SST_SND_PLAY/CAPTURE ret_val = %x\n", ret_val);
	220	if (ret_val < 0)
	221	return ret_val;
	222
	223	stream->stream_info.str_id = ret_val;
	224	pr_debug("str id : %d\n", stream->stream_info.str_id);
d927fdae VK	225	return ret_val;
	226	}
	227
d927fdae VK	228	static void sst_period_elapsed(void *mad_substream)
	229	{
	230	struct snd_pcm_substream *substream = mad_substream;
	231	struct sst_runtime_stream *stream;
5c68536f	232	int status;
d927fdae VK	233
	234	if (!substream \|\| !substream->runtime)
	235	return;
	236	stream = substream->runtime->private_data;
	237	if (!stream)
	238	return;
5c68536f HP	239	status = sst_get_stream_status(stream);
5c68536f HP	240	if (status != SST_PLATFORM_RUNNING)
d927fdae	241	return;
d927fdae	242	snd_pcm_period_elapsed(substream);
d927fdae VK	243	}
	244
	245	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	246	{
	247	struct sst_runtime_stream *stream =
	248	substream->runtime->private_data;
	249	int ret_val;
	250
	251	pr_debug("setting buffer ptr param\n");
5c68536f	252	sst_set_stream_status(stream, SST_PLATFORM_INIT);
d927fdae VK	253	stream->stream_info.period_elapsed = sst_period_elapsed;
	254	stream->stream_info.mad_substream = substream;
	255	stream->stream_info.buffer_ptr = 0;
	256	stream->stream_info.sfreq = substream->runtime->rate;
03c33042	257	ret_val = stream->ops->device_control(
a211701e	258	SST_SND_STREAM_INIT, &stream->stream_info);
d927fdae VK	259	if (ret_val)
	260	pr_err("control_set ret error %d\n", ret_val);
	261	return ret_val;
	262
	263	}
	264	/* end -- helper functions */
	265
	266	static int sst_platform_open(struct snd_pcm_substream *substream)
	267	{
22be504a	268	struct snd_pcm_runtime *runtime = substream->runtime;
d927fdae	269	struct sst_runtime_stream *stream;
c45471ea	270	int ret_val;
d927fdae VK	271
d927fdae VK	272	pr_debug("sst_platform_open called\n");
22be504a LG	273
22be504a LG	274	snd_soc_set_runtime_hwparams(substream, &sst_platform_pcm_hw);
283e42e0 LG	275	ret_val = snd_pcm_hw_constraint_integer(runtime,
	276	SNDRV_PCM_HW_PARAM_PERIODS);
	277	if (ret_val < 0)
	278	return ret_val;
22be504a	279
d927fdae VK	280	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	281	if (!stream)
	282	return -ENOMEM;
d927fdae	283	spin_lock_init(&stream->status_lock);
03c33042 VK	284
	285	/* get the sst ops */
	286	mutex_lock(&sst_lock);
	287	if (!sst) {
	288	pr_err("no device available to run\n");
	289	mutex_unlock(&sst_lock);
d927fdae	290	kfree(stream);
03c33042	291	return -ENODEV;
d927fdae	292	}
03c33042 VK	293	if (!try_module_get(sst->dev->driver->owner)) {
03c33042 VK	294	mutex_unlock(&sst_lock);
83a3fd3c	295	kfree(stream);
03c33042	296	return -ENODEV;
d927fdae	297	}
03c33042 VK	298	stream->ops = sst->ops;
	299	mutex_unlock(&sst_lock);
	300
	301	stream->stream_info.str_id = 0;
	302	sst_set_stream_status(stream, SST_PLATFORM_INIT);
	303	stream->stream_info.mad_substream = substream;
	304	/* allocate memory for SST API set */
d927fdae	305	runtime->private_data = stream;
283e42e0 LG	306
283e42e0 LG	307	return 0;
d927fdae VK	308	}
	309
	310	static int sst_platform_close(struct snd_pcm_substream *substream)
	311	{
	312	struct sst_runtime_stream *stream;
	313	int ret_val = 0, str_id;
	314
	315	pr_debug("sst_platform_close called\n");
d927fdae VK	316	stream = substream->runtime->private_data;
d927fdae VK	317	str_id = stream->stream_info.str_id;
d927fdae	318	if (str_id)
03c33042 VK	319	ret_val = stream->ops->close(str_id);
03c33042 VK	320	module_put(sst->dev->driver->owner);
d927fdae VK	321	kfree(stream);
	322	return ret_val;
	323	}
	324
	325	static int sst_platform_pcm_prepare(struct snd_pcm_substream *substream)
	326	{
	327	struct sst_runtime_stream *stream;
	328	int ret_val = 0, str_id;
	329
	330	pr_debug("sst_platform_pcm_prepare called\n");
d927fdae VK	331	stream = substream->runtime->private_data;
	332	str_id = stream->stream_info.str_id;
	333	if (stream->stream_info.str_id) {
03c33042 VK	334	ret_val = stream->ops->device_control(
03c33042 VK	335	SST_SND_DROP, &str_id);
d927fdae VK	336	return ret_val;
	337	}
	338
	339	ret_val = sst_platform_alloc_stream(substream);
	340	if (ret_val < 0)
	341	return ret_val;
	342	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	343	"%d", stream->stream_info.str_id);
	344
	345	ret_val = sst_platform_init_stream(substream);
	346	if (ret_val)
	347	return ret_val;
	348	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	349	return ret_val;
	350	}
	351
	352	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
	353	int cmd)
	354	{
	355	int ret_val = 0, str_id;
	356	struct sst_runtime_stream *stream;
a211701e	357	int str_cmd, status;
d927fdae VK	358
d927fdae VK	359	pr_debug("sst_platform_pcm_trigger called\n");
d927fdae	360	stream = substream->runtime->private_data;
d927fdae	361	str_id = stream->stream_info.str_id;
d927fdae VK	362	switch (cmd) {
	363	case SNDRV_PCM_TRIGGER_START:
	364	pr_debug("sst: Trigger Start\n");
a211701e HP	365	str_cmd = SST_SND_START;
a211701e HP	366	status = SST_PLATFORM_RUNNING;
d927fdae VK	367	stream->stream_info.mad_substream = substream;
	368	break;
	369	case SNDRV_PCM_TRIGGER_STOP:
	370	pr_debug("sst: in stop\n");
a211701e HP	371	str_cmd = SST_SND_DROP;
a211701e HP	372	status = SST_PLATFORM_DROPPED;
d927fdae VK	373	break;
	374	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	375	pr_debug("sst: in pause\n");
a211701e HP	376	str_cmd = SST_SND_PAUSE;
a211701e HP	377	status = SST_PLATFORM_PAUSED;
d927fdae VK	378	break;
	379	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	380	pr_debug("sst: in pause release\n");
a211701e HP	381	str_cmd = SST_SND_RESUME;
a211701e HP	382	status = SST_PLATFORM_RUNNING;
d927fdae VK	383	break;
d927fdae VK	384	default:
a211701e	385	return -EINVAL;
d927fdae	386	}
03c33042	387	ret_val = stream->ops->device_control(str_cmd, &str_id);
a211701e HP	388	if (!ret_val)
	389	sst_set_stream_status(stream, status);
	390
d927fdae VK	391	return ret_val;
	392	}
	393
	394
	395	static snd_pcm_uframes_t sst_platform_pcm_pointer
	396	(struct snd_pcm_substream *substream)
	397	{
	398	struct sst_runtime_stream *stream;
5c68536f	399	int ret_val, status;
d927fdae VK	400	struct pcm_stream_info *str_info;
d927fdae VK	401
d927fdae	402	stream = substream->runtime->private_data;
5c68536f HP	403	status = sst_get_stream_status(stream);
5c68536f HP	404	if (status == SST_PLATFORM_INIT)
d927fdae	405	return 0;
d927fdae	406	str_info = &stream->stream_info;
03c33042	407	ret_val = stream->ops->device_control(
d927fdae VK	408	SST_SND_BUFFER_POINTER, str_info);
	409	if (ret_val) {
	410	pr_err("sst: error code = %d\n", ret_val);
	411	return ret_val;
	412	}
d927fdae VK	413	return stream->stream_info.buffer_ptr;
	414	}
	415
5b499f8b VK	416	static int sst_platform_pcm_hw_params(struct snd_pcm_substream *substream,
	417	struct snd_pcm_hw_params *params)
	418	{
	419	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	420	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	421
	422	return 0;
	423	}
d927fdae	424
9ab88434	425	static int sst_platform_pcm_hw_free(struct snd_pcm_substream *substream)
	426	{
	427	return snd_pcm_lib_free_pages(substream);
	428	}
	429
d927fdae VK	430	static struct snd_pcm_ops sst_platform_ops = {
	431	.open = sst_platform_open,
	432	.close = sst_platform_close,
	433	.ioctl = snd_pcm_lib_ioctl,
	434	.prepare = sst_platform_pcm_prepare,
	435	.trigger = sst_platform_pcm_trigger,
	436	.pointer = sst_platform_pcm_pointer,
5b499f8b	437	.hw_params = sst_platform_pcm_hw_params,
9ab88434	438	.hw_free = sst_platform_pcm_hw_free,
d927fdae VK	439	};
	440
	441	static void sst_pcm_free(struct snd_pcm *pcm)
	442	{
	443	pr_debug("sst_pcm_free called\n");
	444	snd_pcm_lib_preallocate_free_for_all(pcm);
	445	}
	446
8faa8c1a	447	static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
d927fdae	448	{
552d1ef6	449	struct snd_pcm *pcm = rtd->pcm;
d927fdae VK	450	int retval = 0;
	451
	452	pr_debug("sst_pcm_new called\n");
25e9e756 JE	453	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream \|\|
25e9e756 JE	454	pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
d927fdae VK	455	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
	456	SNDRV_DMA_TYPE_CONTINUOUS,
	457	snd_dma_continuous_data(GFP_KERNEL),
	458	SST_MIN_BUFFER, SST_MAX_BUFFER);
	459	if (retval) {
	460	pr_err("dma buffer allocationf fail\n");
	461	return retval;
	462	}
	463	}
d927fdae VK	464	return retval;
d927fdae VK	465	}
8faa8c1a	466	static struct snd_soc_platform_driver sst_soc_platform_drv = {
d927fdae VK	467	.ops = &sst_platform_ops,
	468	.pcm_new = sst_pcm_new,
	469	.pcm_free = sst_pcm_free,
	470	};
	471
	472	static int sst_platform_probe(struct platform_device *pdev)
	473	{
	474	int ret;
	475
	476	pr_debug("sst_platform_probe called\n");
03c33042	477	sst = NULL;
d927fdae VK	478	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	479	if (ret) {
	480	pr_err("registering soc platform failed\n");
	481	return ret;
	482	}
5c68536f	483
d927fdae VK	484	ret = snd_soc_register_dais(&pdev->dev,
	485	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	486	if (ret) {
	487	pr_err("registering cpu dais failed\n");
	488	snd_soc_unregister_platform(&pdev->dev);
	489	}
	490	return ret;
	491	}
	492
	493	static int sst_platform_remove(struct platform_device *pdev)
	494	{
	495
	496	snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(sst_platform_dai));
d927fdae	497	snd_soc_unregister_platform(&pdev->dev);
25985edc	498	pr_debug("sst_platform_remove success\n");
d927fdae VK	499	return 0;
	500	}
	501
	502	static struct platform_driver sst_platform_driver = {
	503	.driver = {
	504	.name = "sst-platform",
	505	.owner = THIS_MODULE,
	506	},
	507	.probe = sst_platform_probe,
	508	.remove = sst_platform_remove,
	509	};
	510
29515d62	511	module_platform_driver(sst_platform_driver);
d927fdae VK	512
	513	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	514	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	515	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	516	MODULE_LICENSE("GPL v2");
f5c6b2aa	517	MODULE_ALIAS("platform:sst-platform");