[deliverable/linux.git] / sound / soc / pxa / mmp-pcm.c

/*
 * linux/sound/soc/pxa/mmp-pcm.c
 *
 * Copyright (C) 2011 Marvell International Ltd.
 *
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/platform_data/dma-mmp_tdma.h>
#include <linux/platform_data/mmp_audio.h>
#include <linux/dmaengine.h>

#include <sound/pxa2xx-lib.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/dmaengine_pcm.h>

struct mmp_dma_data {
	int ssp_id;
	struct resource *dma_res;
};

#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP |	\
		SNDRV_PCM_INFO_MMAP_VALID |	\
		SNDRV_PCM_INFO_INTERLEAVED |	\
		SNDRV_PCM_INFO_PAUSE |		\
		SNDRV_PCM_INFO_RESUME)

#define MMP_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
			 SNDRV_PCM_FMTBIT_S24_LE | \
			 SNDRV_PCM_FMTBIT_S32_LE)

static struct snd_pcm_hardware mmp_pcm_hardware[] = {
	{
		.info			= MMP_PCM_INFO,
		.formats		= MMP_PCM_FORMATS,
		.period_bytes_min	= 1024,
		.period_bytes_max	= 2048,
		.periods_min		= 2,
		.periods_max		= 32,
		.buffer_bytes_max	= 4096,
		.fifo_size		= 32,
	},
	{
		.info			= MMP_PCM_INFO,
		.formats		= MMP_PCM_FORMATS,
		.period_bytes_min	= 1024,
		.period_bytes_max	= 2048,
		.periods_min		= 2,
		.periods_max		= 32,
		.buffer_bytes_max	= 4096,
		.fifo_size		= 32,
	},
};

static int mmp_pcm_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *params)
{
	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_dmaengine_dai_dma_data *dma_params;
	struct dma_slave_config slave_config;
	int ret;

	dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
	if (!dma_params)
		return 0;

	ret = snd_hwparams_to_dma_slave_config(substream, params, &slave_config);
	if (ret)
		return ret;

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
		slave_config.dst_addr     = dma_params->addr;
		slave_config.dst_maxburst = 4;
	} else {
		slave_config.src_addr	  = dma_params->addr;
		slave_config.src_maxburst = 4;
	}

	ret = dmaengine_slave_config(chan, &slave_config);
	if (ret)
		return ret;

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);

	return 0;
}

static bool filter(struct dma_chan *chan, void *param)
{
	struct mmp_dma_data *dma_data = param;
	bool found = false;
	char *devname;

	devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
		dma_data->ssp_id);
	if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
		(chan->chan_id == dma_data->dma_res->start)) {
		found = true;
	}

	kfree(devname);
	return found;
}

static int mmp_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct platform_device *pdev = to_platform_device(rtd->platform->dev);
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct mmp_dma_data dma_data;
	struct resource *r;

	r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
	if (!r)
		return -EBUSY;

	snd_soc_set_runtime_hwparams(substream,
				&mmp_pcm_hardware[substream->stream]);

	dma_data.dma_res = r;
	dma_data.ssp_id = cpu_dai->id;

	return snd_dmaengine_pcm_open_request_chan(substream, filter,
		    &dma_data);
}

static int mmp_pcm_mmap(struct snd_pcm_substream *substream,
			 struct vm_area_struct *vma)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	unsigned long off = vma->vm_pgoff;

	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	return remap_pfn_range(vma, vma->vm_start,
		__phys_to_pfn(runtime->dma_addr) + off,
		vma->vm_end - vma->vm_start, vma->vm_page_prot);
}

static struct snd_pcm_ops mmp_pcm_ops = {
	.open		= mmp_pcm_open,
	.close		= snd_dmaengine_pcm_close_release_chan,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= mmp_pcm_hw_params,
	.trigger	= snd_dmaengine_pcm_trigger,
	.pointer	= snd_dmaengine_pcm_pointer,
	.mmap		= mmp_pcm_mmap,
};

static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
	struct snd_pcm_substream *substream;
	struct snd_dma_buffer *buf;
	int stream;
	struct gen_pool *gpool;

	gpool = sram_get_gpool("asram");
	if (!gpool)
		return;

	for (stream = 0; stream < 2; stream++) {
		size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;

		substream = pcm->streams[stream].substream;
		if (!substream)
			continue;

		buf = &substream->dma_buffer;
		if (!buf->area)
			continue;
		gen_pool_free(gpool, (unsigned long)buf->area, size);
		buf->area = NULL;
	}

	return;
}

static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
								int stream)
{
	struct snd_dma_buffer *buf = &substream->dma_buffer;
	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	struct gen_pool *gpool;

	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	buf->dev.dev = substream->pcm->card->dev;
	buf->private_data = NULL;

	gpool = sram_get_gpool("asram");
	if (!gpool)
		return -ENOMEM;

	buf->area = (unsigned char *)gen_pool_alloc(gpool, size);
	if (!buf->area)
		return -ENOMEM;
	buf->addr = gen_pool_virt_to_phys(gpool, (unsigned long)buf->area);
	buf->bytes = size;
	return 0;
}

static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_pcm_substream *substream;
	struct snd_pcm *pcm = rtd->pcm;
	int ret = 0, stream;

	for (stream = 0; stream < 2; stream++) {
		substream = pcm->streams[stream].substream;

		ret = mmp_pcm_preallocate_dma_buffer(substream,	stream);
		if (ret)
			goto err;
	}

	return 0;

err:
	mmp_pcm_free_dma_buffers(pcm);
	return ret;
}

static struct snd_soc_platform_driver mmp_soc_platform = {
	.ops		= &mmp_pcm_ops,
	.pcm_new	= mmp_pcm_new,
	.pcm_free	= mmp_pcm_free_dma_buffers,
};

static int mmp_pcm_probe(struct platform_device *pdev)
{
	struct mmp_audio_platdata *pdata = pdev->dev.platform_data;

	if (pdata) {
		mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
						pdata->buffer_max_playback;
		mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
						pdata->period_max_playback;
		mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
						pdata->buffer_max_capture;
		mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
						pdata->period_max_capture;
	}
	return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform);
}

static int mmp_pcm_remove(struct platform_device *pdev)
{
	snd_soc_unregister_platform(&pdev->dev);
	return 0;
}

static struct platform_driver mmp_pcm_driver = {
	.driver = {
		.name = "mmp-pcm-audio",
		.owner = THIS_MODULE,
	},

	.probe = mmp_pcm_probe,
	.remove = mmp_pcm_remove,
};

module_platform_driver(mmp_pcm_driver);

MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP Soc Audio DMA module");
MODULE_LICENSE("GPL");
Commit	Line	Data
7a824e21 ZG	1	/*
	2	* linux/sound/soc/pxa/mmp-pcm.c
	3	*
	4	* Copyright (C) 2011 Marvell International Ltd.
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	*/
	12	#include <linux/module.h>
	13	#include <linux/init.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/slab.h>
	16	#include <linux/dma-mapping.h>
	17	#include <linux/dmaengine.h>
ca057410	18	#include <linux/platform_data/dma-mmp_tdma.h>
7a824e21	19	#include <linux/platform_data/mmp_audio.h>
d65a1458 DM	20	#include <linux/dmaengine.h>
d65a1458 DM	21
7a824e21 ZG	22	#include <sound/pxa2xx-lib.h>
	23	#include <sound/core.h>
	24	#include <sound/pcm.h>
	25	#include <sound/pcm_params.h>
	26	#include <sound/soc.h>
7a824e21 ZG	27	#include <sound/dmaengine_pcm.h>
	28
	29	struct mmp_dma_data {
	30	int ssp_id;
	31	struct resource *dma_res;
	32	};
	33
	34	#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP \| \
	35	SNDRV_PCM_INFO_MMAP_VALID \| \
	36	SNDRV_PCM_INFO_INTERLEAVED \| \
	37	SNDRV_PCM_INFO_PAUSE \| \
	38	SNDRV_PCM_INFO_RESUME)
	39
	40	#define MMP_PCM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| \
	41	SNDRV_PCM_FMTBIT_S24_LE \| \
	42	SNDRV_PCM_FMTBIT_S32_LE)
	43
	44	static struct snd_pcm_hardware mmp_pcm_hardware[] = {
	45	{
	46	.info = MMP_PCM_INFO,
	47	.formats = MMP_PCM_FORMATS,
	48	.period_bytes_min = 1024,
	49	.period_bytes_max = 2048,
	50	.periods_min = 2,
	51	.periods_max = 32,
	52	.buffer_bytes_max = 4096,
	53	.fifo_size = 32,
	54	},
	55	{
	56	.info = MMP_PCM_INFO,
	57	.formats = MMP_PCM_FORMATS,
	58	.period_bytes_min = 1024,
	59	.period_bytes_max = 2048,
	60	.periods_min = 2,
	61	.periods_max = 32,
	62	.buffer_bytes_max = 4096,
	63	.fifo_size = 32,
	64	},
	65	};
	66
	67	static int mmp_pcm_hw_params(struct snd_pcm_substream *substream,
	68	struct snd_pcm_hw_params *params)
	69	{
	70	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
	71	struct snd_soc_pcm_runtime *rtd = substream->private_data;
d65a1458	72	struct snd_dmaengine_dai_dma_data *dma_params;
7a824e21 ZG	73	struct dma_slave_config slave_config;
	74	int ret;
	75
	76	dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
	77	if (!dma_params)
	78	return 0;
	79
	80	ret = snd_hwparams_to_dma_slave_config(substream, params, &slave_config);
	81	if (ret)
	82	return ret;
	83
	84	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
d65a1458	85	slave_config.dst_addr = dma_params->addr;
7a824e21 ZG	86	slave_config.dst_maxburst = 4;
7a824e21 ZG	87	} else {
d65a1458	88	slave_config.src_addr = dma_params->addr;
7a824e21 ZG	89	slave_config.src_maxburst = 4;
	90	}
	91
	92	ret = dmaengine_slave_config(chan, &slave_config);
	93	if (ret)
	94	return ret;
	95
	96	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	97
	98	return 0;
	99	}
	100
	101	static bool filter(struct dma_chan chan, void param)
	102	{
	103	struct mmp_dma_data *dma_data = param;
	104	bool found = false;
	105	char *devname;
	106
	107	devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
	108	dma_data->ssp_id);
	109	if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
	110	(chan->chan_id == dma_data->dma_res->start)) {
	111	found = true;
	112	}
	113
	114	kfree(devname);
	115	return found;
	116	}
	117
	118	static int mmp_pcm_open(struct snd_pcm_substream *substream)
	119	{
	120	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	121	struct platform_device *pdev = to_platform_device(rtd->platform->dev);
	122	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
ac581e60	123	struct mmp_dma_data dma_data;
7a824e21	124	struct resource *r;
7a824e21 ZG	125
	126	r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
	127	if (!r)
	128	return -EBUSY;
	129
	130	snd_soc_set_runtime_hwparams(substream,
	131	&mmp_pcm_hardware[substream->stream]);
7a824e21	132
ac581e60 LPC	133	dma_data.dma_res = r;
ac581e60 LPC	134	dma_data.ssp_id = cpu_dai->id;
7a824e21	135
7c1c1d4a LPC	136	return snd_dmaengine_pcm_open_request_chan(substream, filter,
7c1c1d4a LPC	137	&dma_data);
7a824e21 ZG	138	}
	139
	140	static int mmp_pcm_mmap(struct snd_pcm_substream *substream,
	141	struct vm_area_struct *vma)
	142	{
	143	struct snd_pcm_runtime *runtime = substream->runtime;
	144	unsigned long off = vma->vm_pgoff;
	145
	146	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	147	return remap_pfn_range(vma, vma->vm_start,
	148	__phys_to_pfn(runtime->dma_addr) + off,
	149	vma->vm_end - vma->vm_start, vma->vm_page_prot);
	150	}
	151
60e10d2f	152	static struct snd_pcm_ops mmp_pcm_ops = {
7a824e21	153	.open = mmp_pcm_open,
7c1c1d4a	154	.close = snd_dmaengine_pcm_close_release_chan,
7a824e21 ZG	155	.ioctl = snd_pcm_lib_ioctl,
	156	.hw_params = mmp_pcm_hw_params,
	157	.trigger = snd_dmaengine_pcm_trigger,
	158	.pointer = snd_dmaengine_pcm_pointer,
	159	.mmap = mmp_pcm_mmap,
	160	};
	161
	162	static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm)
	163	{
	164	struct snd_pcm_substream *substream;
	165	struct snd_dma_buffer *buf;
	166	int stream;
	167	struct gen_pool *gpool;
	168
	169	gpool = sram_get_gpool("asram");
	170	if (!gpool)
	171	return;
	172
	173	for (stream = 0; stream < 2; stream++) {
	174	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	175
	176	substream = pcm->streams[stream].substream;
	177	if (!substream)
	178	continue;
	179
	180	buf = &substream->dma_buffer;
	181	if (!buf->area)
	182	continue;
	183	gen_pool_free(gpool, (unsigned long)buf->area, size);
	184	buf->area = NULL;
	185	}
	186
	187	return;
	188	}
	189
	190	static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
	191	int stream)
	192	{
	193	struct snd_dma_buffer *buf = &substream->dma_buffer;
	194	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	195	struct gen_pool *gpool;
	196
	197	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	198	buf->dev.dev = substream->pcm->card->dev;
	199	buf->private_data = NULL;
	200
	201	gpool = sram_get_gpool("asram");
	202	if (!gpool)
	203	return -ENOMEM;
	204
	205	buf->area = (unsigned char *)gen_pool_alloc(gpool, size);
	206	if (!buf->area)
	207	return -ENOMEM;
	208	buf->addr = gen_pool_virt_to_phys(gpool, (unsigned long)buf->area);
	209	buf->bytes = size;
	210	return 0;
	211	}
	212
60e10d2f	213	static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd)
7a824e21 ZG	214	{
	215	struct snd_pcm_substream *substream;
	216	struct snd_pcm *pcm = rtd->pcm;
	217	int ret = 0, stream;
	218
	219	for (stream = 0; stream < 2; stream++) {
	220	substream = pcm->streams[stream].substream;
	221
	222	ret = mmp_pcm_preallocate_dma_buffer(substream, stream);
	223	if (ret)
	224	goto err;
	225	}
	226
	227	return 0;
	228
	229	err:
	230	mmp_pcm_free_dma_buffers(pcm);
	231	return ret;
	232	}
	233
60e10d2f	234	static struct snd_soc_platform_driver mmp_soc_platform = {
7a824e21 ZG	235	.ops = &mmp_pcm_ops,
	236	.pcm_new = mmp_pcm_new,
	237	.pcm_free = mmp_pcm_free_dma_buffers,
	238	};
	239
570f6fe1	240	static int mmp_pcm_probe(struct platform_device *pdev)
7a824e21 ZG	241	{
	242	struct mmp_audio_platdata *pdata = pdev->dev.platform_data;
	243
	244	if (pdata) {
	245	mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
	246	pdata->buffer_max_playback;
	247	mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
	248	pdata->period_max_playback;
	249	mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
	250	pdata->buffer_max_capture;
	251	mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
	252	pdata->period_max_capture;
	253	}
	254	return snd_soc_register_platform(&pdev->dev, &mmp_soc_platform);
	255	}
	256
570f6fe1	257	static int mmp_pcm_remove(struct platform_device *pdev)
7a824e21 ZG	258	{
	259	snd_soc_unregister_platform(&pdev->dev);
	260	return 0;
	261	}
	262
	263	static struct platform_driver mmp_pcm_driver = {
	264	.driver = {
	265	.name = "mmp-pcm-audio",
	266	.owner = THIS_MODULE,
	267	},
	268
	269	.probe = mmp_pcm_probe,
570f6fe1	270	.remove = mmp_pcm_remove,
7a824e21 ZG	271	};
	272
	273	module_platform_driver(mmp_pcm_driver);
	274
	275	MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
	276	MODULE_DESCRIPTION("MMP Soc Audio DMA module");
	277	MODULE_LICENSE("GPL");