[deliverable/linux.git] / sound / soc / intel / sst-mfld-platform-pcm.c

/*
 *  sst_mfld_platform.c - Intel MID Platform driver
 *
 *  Copyright (C) 2010-2014 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.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#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 <sound/compress_driver.h>
#include <asm/platform_sst_audio.h>
#include "sst-mfld-platform.h"
#include "sst-atom-controls.h"

struct sst_device *sst;
static DEFINE_MUTEX(sst_lock);
extern struct snd_compr_ops sst_platform_compr_ops;

int sst_register_dsp(struct sst_device *dev)
{
	if (WARN_ON(!dev))
		return -EINVAL;
	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)
{
	if (WARN_ON(!dev))
		return -EINVAL;
	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),
	.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,
};

static struct sst_dev_stream_map dpcm_strm_map[] = {
	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
};

/* 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 = "Compress-cpu-dai",
	.compress_dai = 1,
	.playback = {
		.channels_min = SST_STEREO,
		.channels_max = SST_STEREO,
		.rates = SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
},
};

/* helper functions */
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_alloc_params(struct snd_pcm_substream *substream,
				struct snd_sst_alloc_params_ext *alloc_param)
{
	unsigned int channels;
	snd_pcm_uframes_t period_size;
	ssize_t periodbytes;
	ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
	u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);

	channels = substream->runtime->channels;
	period_size = substream->runtime->period_size;
	periodbytes = samples_to_bytes(substream->runtime, period_size);
	alloc_param->ring_buf_info[0].addr = buffer_addr;
	alloc_param->ring_buf_info[0].size = buffer_bytes;
	alloc_param->sg_count = 1;
	alloc_param->reserved = 0;
	alloc_param->frag_size = periodbytes * channels;

}
static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
				struct snd_sst_stream_params *param)
{
	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.sfreq = substream->runtime->rate;

	/* PCM stream via ALSA interface */
	param->uc.pcm_params.use_offload_path = 0;
	param->uc.pcm_params.reserved2 = 0;
	memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));

}

static int sst_get_stream_mapping(int dev, int sdev, int dir,
	struct sst_dev_stream_map *map, int size)
{
	int i;

	if (map == NULL)
		return -EINVAL;


	/* index 0 is not used in stream map */
	for (i = 1; i < size; i++) {
		if ((map[i].dev_num == dev) && (map[i].direction == dir))
			return i;
	}
	return 0;
}

int sst_fill_stream_params(void *substream,
	const struct sst_data *ctx, struct snd_sst_params *str_params, bool is_compress)
{
	int map_size;
	int index;
	struct sst_dev_stream_map *map;
	struct snd_pcm_substream *pstream = NULL;
	struct snd_compr_stream *cstream = NULL;

	map = ctx->pdata->pdev_strm_map;
	map_size = ctx->pdata->strm_map_size;

	if (is_compress == true)
		cstream = (struct snd_compr_stream *)substream;
	else
		pstream = (struct snd_pcm_substream *)substream;

	str_params->stream_type = SST_STREAM_TYPE_MUSIC;

	/* For pcm streams */
	if (pstream) {
		index = sst_get_stream_mapping(pstream->pcm->device,
					  pstream->number, pstream->stream,
					  map, map_size);
		if (index <= 0)
			return -EINVAL;

		str_params->stream_id = index;
		str_params->device_type = map[index].device_id;
		str_params->task = map[index].task_id;

		str_params->ops = (u8)pstream->stream;
	}

	if (cstream) {
		index = sst_get_stream_mapping(cstream->device->device,
					       0, cstream->direction,
					       map, map_size);
		if (index <= 0)
			return -EINVAL;
		str_params->stream_id = index;
		str_params->device_type = map[index].device_id;
		str_params->task = map[index].task_id;

		str_params->ops = (u8)cstream->direction;
	}
	return 0;
}

static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
		struct snd_soc_platform *platform)
{
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	struct snd_sst_stream_params param = {{{0,},},};
	struct snd_sst_params str_params = {0};
	struct snd_sst_alloc_params_ext alloc_params = {0};
	int ret_val = 0;
	struct sst_data *ctx = snd_soc_platform_get_drvdata(platform);

	/* set codec params and inform SST driver the same */
	sst_fill_pcm_params(substream, &param);
	sst_fill_alloc_params(substream, &alloc_params);
	substream->runtime->dma_area = substream->dma_buffer.area;
	str_params.sparams = param;
	str_params.aparams = alloc_params;
	str_params.codec = SST_CODEC_TYPE_PCM;

	/* fill the device type and stream id to pass to SST driver */
	ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
	if (ret_val < 0)
		return ret_val;

	stream->stream_info.str_id = str_params.stream_id;

	ret_val = stream->ops->open(&str_params);
	if (ret_val <= 0)
		return ret_val;


	return ret_val;
}

static void sst_period_elapsed(void *arg)
{
	struct snd_pcm_substream *substream = arg;
	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.arg = 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_media_open(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	int ret_val = 0;
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct sst_runtime_stream *stream;

	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 ||
	    !try_module_get(sst->dev->driver->owner)) {
		pr_err("no device available to run\n");
		ret_val = -ENODEV;
		goto out_ops;
	}
	stream->ops = sst->ops;
	mutex_unlock(&sst_lock);

	stream->stream_info.str_id = 0;

	stream->stream_info.arg = substream;
	/* allocate memory for SST API set */
	runtime->private_data = stream;

	/* Make sure, that the period size is always even */
	snd_pcm_hw_constraint_step(substream->runtime, 0,
			   SNDRV_PCM_HW_PARAM_PERIODS, 2);

	return snd_pcm_hw_constraint_integer(runtime,
			 SNDRV_PCM_HW_PARAM_PERIODS);
out_ops:
	kfree(stream);
	mutex_unlock(&sst_lock);
	return ret_val;
}

static void sst_media_close(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	struct sst_runtime_stream *stream;
	int ret_val = 0, str_id;

	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);
}

static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
					       struct snd_pcm_substream *substream)
{
	struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
	struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
	struct sst_runtime_stream *stream =
			substream->runtime->private_data;
	u32 str_id = stream->stream_info.str_id;
	unsigned int pipe_id;
	pipe_id = map[str_id].device_id;

	pr_debug("%s: got pipe_id = %#x for str_id = %d\n",
		 __func__, pipe_id, str_id);
	return pipe_id;
}

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

	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, dai->platform);
	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_media_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	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_media_hw_free(struct snd_pcm_substream *substream,
		struct snd_soc_dai *dai)
{
	return snd_pcm_lib_free_pages(substream);
}

static struct snd_soc_dai_ops sst_media_dai_ops = {
	.startup = sst_media_open,
	.shutdown = sst_media_close,
	.prepare = sst_media_prepare,
	.hw_params = sst_media_hw_params,
	.hw_free = sst_media_hw_free,
};

static int sst_platform_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime;

	if (substream->pcm->internal)
		return 0;

	runtime = substream->runtime;
	runtime->hw = sst_platform_pcm_hw;
	return 0;
}

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.arg = 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;
	}
	substream->runtime->delay = str_info->pcm_delay;
	return str_info->buffer_ptr;
}

static struct snd_pcm_ops sst_platform_ops = {
	.open = sst_platform_open,
	.ioctl = snd_pcm_lib_ioctl,
	.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);
}

static 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;

	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_DMA),
			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,
	.compr_ops	= &sst_platform_compr_ops,
	.pcm_new	= sst_pcm_new,
	.pcm_free	= sst_pcm_free,
};

static const struct snd_soc_component_driver sst_component = {
	.name		= "sst",
};


static int sst_platform_probe(struct platform_device *pdev)
{
	struct sst_data *drv;
	int ret;
	struct sst_platform_data *pdata = pdev->dev.platform_data;

	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
	if (sst == NULL) {
		pr_err("kzalloc failed\n");
		return -ENOMEM;
	}

	pdata->pdev_strm_map = dpcm_strm_map;
	pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
	drv->pdata = pdata;
	mutex_init(&drv->lock);
	dev_set_drvdata(&pdev->dev, drv);

	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_component(&pdev->dev, &sst_component,
				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_component(&pdev->dev);
	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-mfld-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-mfld-platform");
Commit	Line	Data
	1	/*
	2	* sst_mfld_platform.c - Intel MID Platform driver
	3	*
	4	* Copyright (C) 2010-2014 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	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	19	*/
	20	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	21
	22	#include <linux/slab.h>
	23	#include <linux/io.h>
	24	#include <linux/module.h>
	25	#include <sound/core.h>
	26	#include <sound/pcm.h>
	27	#include <sound/pcm_params.h>
	28	#include <sound/soc.h>
	29	#include <sound/compress_driver.h>
	30	#include <asm/platform_sst_audio.h>
	31	#include "sst-mfld-platform.h"
	32	#include "sst-atom-controls.h"
	33
	34	struct sst_device *sst;
	35	static DEFINE_MUTEX(sst_lock);
	36	extern struct snd_compr_ops sst_platform_compr_ops;
	37
	38	int sst_register_dsp(struct sst_device *dev)
	39	{
	40	if (WARN_ON(!dev))
	41	return -EINVAL;
	42	if (!try_module_get(dev->dev->driver->owner))
	43	return -ENODEV;
	44	mutex_lock(&sst_lock);
	45	if (sst) {
	46	pr_err("we already have a device %s\n", sst->name);
	47	module_put(dev->dev->driver->owner);
	48	mutex_unlock(&sst_lock);
	49	return -EEXIST;
	50	}
	51	pr_debug("registering device %s\n", dev->name);
	52	sst = dev;
	53	mutex_unlock(&sst_lock);
	54	return 0;
	55	}
	56	EXPORT_SYMBOL_GPL(sst_register_dsp);
	57
	58	int sst_unregister_dsp(struct sst_device *dev)
	59	{
	60	if (WARN_ON(!dev))
	61	return -EINVAL;
	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
	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	.buffer_bytes_max = SST_MAX_BUFFER,
	90	.period_bytes_min = SST_MIN_PERIOD_BYTES,
	91	.period_bytes_max = SST_MAX_PERIOD_BYTES,
	92	.periods_min = SST_MIN_PERIODS,
	93	.periods_max = SST_MAX_PERIODS,
	94	.fifo_size = SST_FIFO_SIZE,
	95	};
	96
	97	static struct sst_dev_stream_map dpcm_strm_map[] = {
	98	{0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}, /* Reserved, not in use */
	99	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA1_IN, SST_TASK_ID_MEDIA, 0},
	100	{MERR_DPCM_COMPR, 0, SNDRV_PCM_STREAM_PLAYBACK, PIPE_MEDIA0_IN, SST_TASK_ID_MEDIA, 0},
	101	{MERR_DPCM_AUDIO, 0, SNDRV_PCM_STREAM_CAPTURE, PIPE_PCM1_OUT, SST_TASK_ID_MEDIA, 0},
	102	};
	103
	104	/* MFLD - MSIC */
	105	static struct snd_soc_dai_driver sst_platform_dai[] = {
	106	{
	107	.name = "Headset-cpu-dai",
	108	.id = 0,
	109	.playback = {
	110	.channels_min = SST_STEREO,
	111	.channels_max = SST_STEREO,
	112	.rates = SNDRV_PCM_RATE_48000,
	113	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	114	},
	115	.capture = {
	116	.channels_min = 1,
	117	.channels_max = 5,
	118	.rates = SNDRV_PCM_RATE_48000,
	119	.formats = SNDRV_PCM_FMTBIT_S24_LE,
	120	},
	121	},
	122	{
	123	.name = "Compress-cpu-dai",
	124	.compress_dai = 1,
	125	.playback = {
	126	.channels_min = SST_STEREO,
	127	.channels_max = SST_STEREO,
	128	.rates = SNDRV_PCM_RATE_44100\|SNDRV_PCM_RATE_48000,
	129	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	130	},
	131	},
	132	};
	133
	134	/* helper functions */
	135	void sst_set_stream_status(struct sst_runtime_stream *stream,
	136	int state)
	137	{
	138	unsigned long flags;
	139	spin_lock_irqsave(&stream->status_lock, flags);
	140	stream->stream_status = state;
	141	spin_unlock_irqrestore(&stream->status_lock, flags);
	142	}
	143
	144	static inline int sst_get_stream_status(struct sst_runtime_stream *stream)
	145	{
	146	int state;
	147	unsigned long flags;
	148
	149	spin_lock_irqsave(&stream->status_lock, flags);
	150	state = stream->stream_status;
	151	spin_unlock_irqrestore(&stream->status_lock, flags);
	152	return state;
	153	}
	154
	155	static void sst_fill_alloc_params(struct snd_pcm_substream *substream,
	156	struct snd_sst_alloc_params_ext *alloc_param)
	157	{
	158	unsigned int channels;
	159	snd_pcm_uframes_t period_size;
	160	ssize_t periodbytes;
	161	ssize_t buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
	162	u32 buffer_addr = virt_to_phys(substream->dma_buffer.area);
	163
	164	channels = substream->runtime->channels;
	165	period_size = substream->runtime->period_size;
	166	periodbytes = samples_to_bytes(substream->runtime, period_size);
	167	alloc_param->ring_buf_info[0].addr = buffer_addr;
	168	alloc_param->ring_buf_info[0].size = buffer_bytes;
	169	alloc_param->sg_count = 1;
	170	alloc_param->reserved = 0;
	171	alloc_param->frag_size = periodbytes * channels;
	172
	173	}
	174	static void sst_fill_pcm_params(struct snd_pcm_substream *substream,
	175	struct snd_sst_stream_params *param)
	176	{
	177	param->uc.pcm_params.num_chan = (u8) substream->runtime->channels;
	178	param->uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
	179	param->uc.pcm_params.sfreq = substream->runtime->rate;
	180
	181	/* PCM stream via ALSA interface */
	182	param->uc.pcm_params.use_offload_path = 0;
	183	param->uc.pcm_params.reserved2 = 0;
	184	memset(param->uc.pcm_params.channel_map, 0, sizeof(u8));
	185
	186	}
	187
	188	static int sst_get_stream_mapping(int dev, int sdev, int dir,
	189	struct sst_dev_stream_map *map, int size)
	190	{
	191	int i;
	192
	193	if (map == NULL)
	194	return -EINVAL;
	195
	196
	197	/* index 0 is not used in stream map */
	198	for (i = 1; i < size; i++) {
	199	if ((map[i].dev_num == dev) && (map[i].direction == dir))
	200	return i;
	201	}
	202	return 0;
	203	}
	204
	205	int sst_fill_stream_params(void *substream,
	206	const struct sst_data ctx, struct snd_sst_params str_params, bool is_compress)
	207	{
	208	int map_size;
	209	int index;
	210	struct sst_dev_stream_map *map;
	211	struct snd_pcm_substream *pstream = NULL;
	212	struct snd_compr_stream *cstream = NULL;
	213
	214	map = ctx->pdata->pdev_strm_map;
	215	map_size = ctx->pdata->strm_map_size;
	216
	217	if (is_compress == true)
	218	cstream = (struct snd_compr_stream *)substream;
	219	else
	220	pstream = (struct snd_pcm_substream *)substream;
	221
	222	str_params->stream_type = SST_STREAM_TYPE_MUSIC;
	223
	224	/* For pcm streams */
	225	if (pstream) {
	226	index = sst_get_stream_mapping(pstream->pcm->device,
	227	pstream->number, pstream->stream,
	228	map, map_size);
	229	if (index <= 0)
	230	return -EINVAL;
	231
	232	str_params->stream_id = index;
	233	str_params->device_type = map[index].device_id;
	234	str_params->task = map[index].task_id;
	235
	236	str_params->ops = (u8)pstream->stream;
	237	}
	238
	239	if (cstream) {
	240	index = sst_get_stream_mapping(cstream->device->device,
	241	0, cstream->direction,
	242	map, map_size);
	243	if (index <= 0)
	244	return -EINVAL;
	245	str_params->stream_id = index;
	246	str_params->device_type = map[index].device_id;
	247	str_params->task = map[index].task_id;
	248
	249	str_params->ops = (u8)cstream->direction;
	250	}
	251	return 0;
	252	}
	253
	254	static int sst_platform_alloc_stream(struct snd_pcm_substream *substream,
	255	struct snd_soc_platform *platform)
	256	{
	257	struct sst_runtime_stream *stream =
	258	substream->runtime->private_data;
	259	struct snd_sst_stream_params param = {{{0,},},};
	260	struct snd_sst_params str_params = {0};
	261	struct snd_sst_alloc_params_ext alloc_params = {0};
	262	int ret_val = 0;
	263	struct sst_data *ctx = snd_soc_platform_get_drvdata(platform);
	264
	265	/* set codec params and inform SST driver the same */
	266	sst_fill_pcm_params(substream, &param);
	267	sst_fill_alloc_params(substream, &alloc_params);
	268	substream->runtime->dma_area = substream->dma_buffer.area;
	269	str_params.sparams = param;
	270	str_params.aparams = alloc_params;
	271	str_params.codec = SST_CODEC_TYPE_PCM;
	272
	273	/* fill the device type and stream id to pass to SST driver */
	274	ret_val = sst_fill_stream_params(substream, ctx, &str_params, false);
	275	if (ret_val < 0)
	276	return ret_val;
	277
	278	stream->stream_info.str_id = str_params.stream_id;
	279
	280	ret_val = stream->ops->open(&str_params);
	281	if (ret_val <= 0)
	282	return ret_val;
	283
	284
	285	return ret_val;
	286	}
	287
	288	static void sst_period_elapsed(void *arg)
	289	{
	290	struct snd_pcm_substream *substream = arg;
	291	struct sst_runtime_stream *stream;
	292	int status;
	293
	294	if (!substream \|\| !substream->runtime)
	295	return;
	296	stream = substream->runtime->private_data;
	297	if (!stream)
	298	return;
	299	status = sst_get_stream_status(stream);
	300	if (status != SST_PLATFORM_RUNNING)
	301	return;
	302	snd_pcm_period_elapsed(substream);
	303	}
	304
	305	static int sst_platform_init_stream(struct snd_pcm_substream *substream)
	306	{
	307	struct sst_runtime_stream *stream =
	308	substream->runtime->private_data;
	309	int ret_val;
	310
	311	pr_debug("setting buffer ptr param\n");
	312	sst_set_stream_status(stream, SST_PLATFORM_INIT);
	313	stream->stream_info.period_elapsed = sst_period_elapsed;
	314	stream->stream_info.arg = substream;
	315	stream->stream_info.buffer_ptr = 0;
	316	stream->stream_info.sfreq = substream->runtime->rate;
	317	ret_val = stream->ops->device_control(
	318	SST_SND_STREAM_INIT, &stream->stream_info);
	319	if (ret_val)
	320	pr_err("control_set ret error %d\n", ret_val);
	321	return ret_val;
	322
	323	}
	324	/* end -- helper functions */
	325
	326	static int sst_media_open(struct snd_pcm_substream *substream,
	327	struct snd_soc_dai *dai)
	328	{
	329	int ret_val = 0;
	330	struct snd_pcm_runtime *runtime = substream->runtime;
	331	struct sst_runtime_stream *stream;
	332
	333	stream = kzalloc(sizeof(*stream), GFP_KERNEL);
	334	if (!stream)
	335	return -ENOMEM;
	336	spin_lock_init(&stream->status_lock);
	337
	338	/* get the sst ops */
	339	mutex_lock(&sst_lock);
	340	if (!sst \|\|
	341	!try_module_get(sst->dev->driver->owner)) {
	342	pr_err("no device available to run\n");
	343	ret_val = -ENODEV;
	344	goto out_ops;
	345	}
	346	stream->ops = sst->ops;
	347	mutex_unlock(&sst_lock);
	348
	349	stream->stream_info.str_id = 0;
	350
	351	stream->stream_info.arg = substream;
	352	/* allocate memory for SST API set */
	353	runtime->private_data = stream;
	354
	355	/* Make sure, that the period size is always even */
	356	snd_pcm_hw_constraint_step(substream->runtime, 0,
	357	SNDRV_PCM_HW_PARAM_PERIODS, 2);
	358
	359	return snd_pcm_hw_constraint_integer(runtime,
	360	SNDRV_PCM_HW_PARAM_PERIODS);
	361	out_ops:
	362	kfree(stream);
	363	mutex_unlock(&sst_lock);
	364	return ret_val;
	365	}
	366
	367	static void sst_media_close(struct snd_pcm_substream *substream,
	368	struct snd_soc_dai *dai)
	369	{
	370	struct sst_runtime_stream *stream;
	371	int ret_val = 0, str_id;
	372
	373	stream = substream->runtime->private_data;
	374	str_id = stream->stream_info.str_id;
	375	if (str_id)
	376	ret_val = stream->ops->close(str_id);
	377	module_put(sst->dev->driver->owner);
	378	kfree(stream);
	379	}
	380
	381	static inline unsigned int get_current_pipe_id(struct snd_soc_platform *platform,
	382	struct snd_pcm_substream *substream)
	383	{
	384	struct sst_data *sst = snd_soc_platform_get_drvdata(platform);
	385	struct sst_dev_stream_map *map = sst->pdata->pdev_strm_map;
	386	struct sst_runtime_stream *stream =
	387	substream->runtime->private_data;
	388	u32 str_id = stream->stream_info.str_id;
	389	unsigned int pipe_id;
	390	pipe_id = map[str_id].device_id;
	391
	392	pr_debug("%s: got pipe_id = %#x for str_id = %d\n",
	393	__func__, pipe_id, str_id);
	394	return pipe_id;
	395	}
	396
	397	static int sst_media_prepare(struct snd_pcm_substream *substream,
	398	struct snd_soc_dai *dai)
	399	{
	400	struct sst_runtime_stream *stream;
	401	int ret_val = 0, str_id;
	402
	403	stream = substream->runtime->private_data;
	404	str_id = stream->stream_info.str_id;
	405	if (stream->stream_info.str_id) {
	406	ret_val = stream->ops->device_control(
	407	SST_SND_DROP, &str_id);
	408	return ret_val;
	409	}
	410
	411	ret_val = sst_platform_alloc_stream(substream, dai->platform);
	412	if (ret_val <= 0)
	413	return ret_val;
	414	snprintf(substream->pcm->id, sizeof(substream->pcm->id),
	415	"%d", stream->stream_info.str_id);
	416
	417	ret_val = sst_platform_init_stream(substream);
	418	if (ret_val)
	419	return ret_val;
	420	substream->runtime->hw.info = SNDRV_PCM_INFO_BLOCK_TRANSFER;
	421	return ret_val;
	422	}
	423
	424	static int sst_media_hw_params(struct snd_pcm_substream *substream,
	425	struct snd_pcm_hw_params *params,
	426	struct snd_soc_dai *dai)
	427	{
	428	snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
	429	memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
	430	return 0;
	431	}
	432
	433	static int sst_media_hw_free(struct snd_pcm_substream *substream,
	434	struct snd_soc_dai *dai)
	435	{
	436	return snd_pcm_lib_free_pages(substream);
	437	}
	438
	439	static struct snd_soc_dai_ops sst_media_dai_ops = {
	440	.startup = sst_media_open,
	441	.shutdown = sst_media_close,
	442	.prepare = sst_media_prepare,
	443	.hw_params = sst_media_hw_params,
	444	.hw_free = sst_media_hw_free,
	445	};
	446
	447	static int sst_platform_open(struct snd_pcm_substream *substream)
	448	{
	449	struct snd_pcm_runtime *runtime;
	450
	451	if (substream->pcm->internal)
	452	return 0;
	453
	454	runtime = substream->runtime;
	455	runtime->hw = sst_platform_pcm_hw;
	456	return 0;
	457	}
	458
	459	static int sst_platform_pcm_trigger(struct snd_pcm_substream *substream,
	460	int cmd)
	461	{
	462	int ret_val = 0, str_id;
	463	struct sst_runtime_stream *stream;
	464	int str_cmd, status;
	465
	466	pr_debug("sst_platform_pcm_trigger called\n");
	467	stream = substream->runtime->private_data;
	468	str_id = stream->stream_info.str_id;
	469	switch (cmd) {
	470	case SNDRV_PCM_TRIGGER_START:
	471	pr_debug("sst: Trigger Start\n");
	472	str_cmd = SST_SND_START;
	473	status = SST_PLATFORM_RUNNING;
	474	stream->stream_info.arg = substream;
	475	break;
	476	case SNDRV_PCM_TRIGGER_STOP:
	477	pr_debug("sst: in stop\n");
	478	str_cmd = SST_SND_DROP;
	479	status = SST_PLATFORM_DROPPED;
	480	break;
	481	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	482	pr_debug("sst: in pause\n");
	483	str_cmd = SST_SND_PAUSE;
	484	status = SST_PLATFORM_PAUSED;
	485	break;
	486	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	487	pr_debug("sst: in pause release\n");
	488	str_cmd = SST_SND_RESUME;
	489	status = SST_PLATFORM_RUNNING;
	490	break;
	491	default:
	492	return -EINVAL;
	493	}
	494	ret_val = stream->ops->device_control(str_cmd, &str_id);
	495	if (!ret_val)
	496	sst_set_stream_status(stream, status);
	497
	498	return ret_val;
	499	}
	500
	501
	502	static snd_pcm_uframes_t sst_platform_pcm_pointer
	503	(struct snd_pcm_substream *substream)
	504	{
	505	struct sst_runtime_stream *stream;
	506	int ret_val, status;
	507	struct pcm_stream_info *str_info;
	508
	509	stream = substream->runtime->private_data;
	510	status = sst_get_stream_status(stream);
	511	if (status == SST_PLATFORM_INIT)
	512	return 0;
	513	str_info = &stream->stream_info;
	514	ret_val = stream->ops->device_control(
	515	SST_SND_BUFFER_POINTER, str_info);
	516	if (ret_val) {
	517	pr_err("sst: error code = %d\n", ret_val);
	518	return ret_val;
	519	}
	520	substream->runtime->delay = str_info->pcm_delay;
	521	return str_info->buffer_ptr;
	522	}
	523
	524	static struct snd_pcm_ops sst_platform_ops = {
	525	.open = sst_platform_open,
	526	.ioctl = snd_pcm_lib_ioctl,
	527	.trigger = sst_platform_pcm_trigger,
	528	.pointer = sst_platform_pcm_pointer,
	529	};
	530
	531	static void sst_pcm_free(struct snd_pcm *pcm)
	532	{
	533	pr_debug("sst_pcm_free called\n");
	534	snd_pcm_lib_preallocate_free_for_all(pcm);
	535	}
	536
	537	static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd)
	538	{
	539	struct snd_soc_dai *dai = rtd->cpu_dai;
	540	struct snd_pcm *pcm = rtd->pcm;
	541	int retval = 0;
	542
	543	if (dai->driver->playback.channels_min \|\|
	544	dai->driver->capture.channels_min) {
	545	retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
	546	SNDRV_DMA_TYPE_CONTINUOUS,
	547	snd_dma_continuous_data(GFP_DMA),
	548	SST_MIN_BUFFER, SST_MAX_BUFFER);
	549	if (retval) {
	550	pr_err("dma buffer allocationf fail\n");
	551	return retval;
	552	}
	553	}
	554	return retval;
	555	}
	556
	557	static struct snd_soc_platform_driver sst_soc_platform_drv = {
	558	.ops = &sst_platform_ops,
	559	.compr_ops = &sst_platform_compr_ops,
	560	.pcm_new = sst_pcm_new,
	561	.pcm_free = sst_pcm_free,
	562	};
	563
	564	static const struct snd_soc_component_driver sst_component = {
	565	.name = "sst",
	566	};
	567
	568
	569	static int sst_platform_probe(struct platform_device *pdev)
	570	{
	571	struct sst_data *drv;
	572	int ret;
	573	struct sst_platform_data *pdata = pdev->dev.platform_data;
	574
	575	drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
	576	if (sst == NULL) {
	577	pr_err("kzalloc failed\n");
	578	return -ENOMEM;
	579	}
	580
	581	pdata->pdev_strm_map = dpcm_strm_map;
	582	pdata->strm_map_size = ARRAY_SIZE(dpcm_strm_map);
	583	drv->pdata = pdata;
	584	mutex_init(&drv->lock);
	585	dev_set_drvdata(&pdev->dev, drv);
	586
	587	ret = snd_soc_register_platform(&pdev->dev, &sst_soc_platform_drv);
	588	if (ret) {
	589	pr_err("registering soc platform failed\n");
	590	return ret;
	591	}
	592
	593	ret = snd_soc_register_component(&pdev->dev, &sst_component,
	594	sst_platform_dai, ARRAY_SIZE(sst_platform_dai));
	595	if (ret) {
	596	pr_err("registering cpu dais failed\n");
	597	snd_soc_unregister_platform(&pdev->dev);
	598	}
	599	return ret;
	600	}
	601
	602	static int sst_platform_remove(struct platform_device *pdev)
	603	{
	604
	605	snd_soc_unregister_component(&pdev->dev);
	606	snd_soc_unregister_platform(&pdev->dev);
	607	pr_debug("sst_platform_remove success\n");
	608	return 0;
	609	}
	610
	611	static struct platform_driver sst_platform_driver = {
	612	.driver = {
	613	.name = "sst-mfld-platform",
	614	.owner = THIS_MODULE,
	615	},
	616	.probe = sst_platform_probe,
	617	.remove = sst_platform_remove,
	618	};
	619
	620	module_platform_driver(sst_platform_driver);
	621
	622	MODULE_DESCRIPTION("ASoC Intel(R) MID Platform driver");
	623	MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
	624	MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
	625	MODULE_LICENSE("GPL v2");
	626	MODULE_ALIAS("platform:sst-mfld-platform");