[linux-2.6-block.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 <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>

#define DRV_NAME "mmp-pcm"

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 |		\
		SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)

static struct snd_pcm_hardware mmp_pcm_hardware[] = {
	{
		.info			= MMP_PCM_INFO,
		.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,
		.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 dma_slave_config slave_config;
	int ret;

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

	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 snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
	struct platform_device *pdev = to_platform_device(component->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 const 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;
	}

}

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 = gen_pool_dma_alloc(gpool, size, &buf->addr);
	if (!buf->area)
		return -ENOMEM;
	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 const struct snd_soc_component_driver mmp_soc_component = {
	.name		= DRV_NAME,
	.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 devm_snd_soc_register_component(&pdev->dev, &mmp_soc_component,
					       NULL, 0);
}

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

	.probe = mmp_pcm_probe,
};

module_platform_driver(mmp_pcm_driver);

MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP Soc Audio DMA module");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mmp-pcm-audio");
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	20
7a824e21 ZG	21	#include <sound/pxa2xx-lib.h>
	22	#include <sound/core.h>
	23	#include <sound/pcm.h>
	24	#include <sound/pcm_params.h>
	25	#include <sound/soc.h>
7a824e21 ZG	26	#include <sound/dmaengine_pcm.h>
7a824e21 ZG	27
797d1697 KM	28	#define DRV_NAME "mmp-pcm"
797d1697 KM	29
7a824e21 ZG	30	struct mmp_dma_data {
	31	int ssp_id;
	32	struct resource *dma_res;
	33	};
	34
	35	#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP \| \
	36	SNDRV_PCM_INFO_MMAP_VALID \| \
	37	SNDRV_PCM_INFO_INTERLEAVED \| \
	38	SNDRV_PCM_INFO_PAUSE \| \
a22e2922 QZ	39	SNDRV_PCM_INFO_RESUME \| \
a22e2922 QZ	40	SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
7a824e21	41
7a824e21 ZG	42	static struct snd_pcm_hardware mmp_pcm_hardware[] = {
	43	{
	44	.info = MMP_PCM_INFO,
7a824e21 ZG	45	.period_bytes_min = 1024,
	46	.period_bytes_max = 2048,
	47	.periods_min = 2,
	48	.periods_max = 32,
	49	.buffer_bytes_max = 4096,
	50	.fifo_size = 32,
	51	},
	52	{
	53	.info = MMP_PCM_INFO,
7a824e21 ZG	54	.period_bytes_min = 1024,
	55	.period_bytes_max = 2048,
	56	.periods_min = 2,
	57	.periods_max = 32,
	58	.buffer_bytes_max = 4096,
	59	.fifo_size = 32,
	60	},
	61	};
	62
	63	static int mmp_pcm_hw_params(struct snd_pcm_substream *substream,
	64	struct snd_pcm_hw_params *params)
	65	{
	66	struct dma_chan *chan = snd_dmaengine_pcm_get_chan(substream);
7a824e21 ZG	67	struct dma_slave_config slave_config;
	68	int ret;
	69
48b752ac QZ	70	ret =
	71	snd_dmaengine_pcm_prepare_slave_config(substream, params,
	72	&slave_config);
7a824e21 ZG	73	if (ret)
	74	return ret;
	75
7a824e21 ZG	76	ret = dmaengine_slave_config(chan, &slave_config);
	77	if (ret)
	78	return ret;
	79
	80	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	81
	82	return 0;
	83	}
	84
	85	static bool filter(struct dma_chan chan, void param)
	86	{
	87	struct mmp_dma_data *dma_data = param;
	88	bool found = false;
	89	char *devname;
	90
	91	devname = kasprintf(GFP_KERNEL, "%s.%d", dma_data->dma_res->name,
	92	dma_data->ssp_id);
	93	if ((strcmp(dev_name(chan->device->dev), devname) == 0) &&
	94	(chan->chan_id == dma_data->dma_res->start)) {
	95	found = true;
	96	}
	97
	98	kfree(devname);
	99	return found;
	100	}
	101
	102	static int mmp_pcm_open(struct snd_pcm_substream *substream)
	103	{
	104	struct snd_soc_pcm_runtime *rtd = substream->private_data;
797d1697 KM	105	struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd, DRV_NAME);
797d1697 KM	106	struct platform_device *pdev = to_platform_device(component->dev);
7a824e21	107	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
ac581e60	108	struct mmp_dma_data dma_data;
7a824e21	109	struct resource *r;
7a824e21 ZG	110
	111	r = platform_get_resource(pdev, IORESOURCE_DMA, substream->stream);
	112	if (!r)
	113	return -EBUSY;
	114
	115	snd_soc_set_runtime_hwparams(substream,
	116	&mmp_pcm_hardware[substream->stream]);
7a824e21	117
ac581e60 LPC	118	dma_data.dma_res = r;
ac581e60 LPC	119	dma_data.ssp_id = cpu_dai->id;
7a824e21	120
7c1c1d4a LPC	121	return snd_dmaengine_pcm_open_request_chan(substream, filter,
7c1c1d4a LPC	122	&dma_data);
7a824e21 ZG	123	}
	124
	125	static int mmp_pcm_mmap(struct snd_pcm_substream *substream,
	126	struct vm_area_struct *vma)
	127	{
	128	struct snd_pcm_runtime *runtime = substream->runtime;
	129	unsigned long off = vma->vm_pgoff;
	130
	131	vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
	132	return remap_pfn_range(vma, vma->vm_start,
	133	__phys_to_pfn(runtime->dma_addr) + off,
	134	vma->vm_end - vma->vm_start, vma->vm_page_prot);
	135	}
	136
d7622fa7	137	static const struct snd_pcm_ops mmp_pcm_ops = {
7a824e21	138	.open = mmp_pcm_open,
7c1c1d4a	139	.close = snd_dmaengine_pcm_close_release_chan,
7a824e21 ZG	140	.ioctl = snd_pcm_lib_ioctl,
	141	.hw_params = mmp_pcm_hw_params,
	142	.trigger = snd_dmaengine_pcm_trigger,
	143	.pointer = snd_dmaengine_pcm_pointer,
	144	.mmap = mmp_pcm_mmap,
	145	};
	146
	147	static void mmp_pcm_free_dma_buffers(struct snd_pcm *pcm)
	148	{
	149	struct snd_pcm_substream *substream;
	150	struct snd_dma_buffer *buf;
	151	int stream;
	152	struct gen_pool *gpool;
	153
	154	gpool = sram_get_gpool("asram");
	155	if (!gpool)
	156	return;
	157
	158	for (stream = 0; stream < 2; stream++) {
	159	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	160
	161	substream = pcm->streams[stream].substream;
	162	if (!substream)
	163	continue;
	164
	165	buf = &substream->dma_buffer;
	166	if (!buf->area)
	167	continue;
	168	gen_pool_free(gpool, (unsigned long)buf->area, size);
	169	buf->area = NULL;
	170	}
	171
7a824e21 ZG	172	}
	173
	174	static int mmp_pcm_preallocate_dma_buffer(struct snd_pcm_substream *substream,
	175	int stream)
	176	{
	177	struct snd_dma_buffer *buf = &substream->dma_buffer;
	178	size_t size = mmp_pcm_hardware[stream].buffer_bytes_max;
	179	struct gen_pool *gpool;
	180
	181	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	182	buf->dev.dev = substream->pcm->card->dev;
	183	buf->private_data = NULL;
	184
	185	gpool = sram_get_gpool("asram");
	186	if (!gpool)
	187	return -ENOMEM;
	188
92a2e1cb	189	buf->area = gen_pool_dma_alloc(gpool, size, &buf->addr);
7a824e21 ZG	190	if (!buf->area)
7a824e21 ZG	191	return -ENOMEM;
7a824e21 ZG	192	buf->bytes = size;
	193	return 0;
	194	}
	195
60e10d2f	196	static int mmp_pcm_new(struct snd_soc_pcm_runtime *rtd)
7a824e21 ZG	197	{
	198	struct snd_pcm_substream *substream;
	199	struct snd_pcm *pcm = rtd->pcm;
	200	int ret = 0, stream;
	201
	202	for (stream = 0; stream < 2; stream++) {
	203	substream = pcm->streams[stream].substream;
	204
	205	ret = mmp_pcm_preallocate_dma_buffer(substream, stream);
	206	if (ret)
	207	goto err;
	208	}
	209
	210	return 0;
	211
	212	err:
	213	mmp_pcm_free_dma_buffers(pcm);
	214	return ret;
	215	}
	216
797d1697 KM	217	static const struct snd_soc_component_driver mmp_soc_component = {
797d1697 KM	218	.name = DRV_NAME,
7a824e21 ZG	219	.ops = &mmp_pcm_ops,
	220	.pcm_new = mmp_pcm_new,
	221	.pcm_free = mmp_pcm_free_dma_buffers,
	222	};
	223
570f6fe1	224	static int mmp_pcm_probe(struct platform_device *pdev)
7a824e21 ZG	225	{
	226	struct mmp_audio_platdata *pdata = pdev->dev.platform_data;
	227
	228	if (pdata) {
	229	mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].buffer_bytes_max =
	230	pdata->buffer_max_playback;
	231	mmp_pcm_hardware[SNDRV_PCM_STREAM_PLAYBACK].period_bytes_max =
	232	pdata->period_max_playback;
	233	mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].buffer_bytes_max =
	234	pdata->buffer_max_capture;
	235	mmp_pcm_hardware[SNDRV_PCM_STREAM_CAPTURE].period_bytes_max =
	236	pdata->period_max_capture;
	237	}
797d1697 KM	238	return devm_snd_soc_register_component(&pdev->dev, &mmp_soc_component,
797d1697 KM	239	NULL, 0);
7a824e21 ZG	240	}
	241
	242	static struct platform_driver mmp_pcm_driver = {
	243	.driver = {
	244	.name = "mmp-pcm-audio",
7a824e21 ZG	245	},
	246
	247	.probe = mmp_pcm_probe,
7a824e21 ZG	248	};
	249
	250	module_platform_driver(mmp_pcm_driver);
	251
	252	MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
	253	MODULE_DESCRIPTION("MMP Soc Audio DMA module");
	254	MODULE_LICENSE("GPL");
e5b7d71a	255	MODULE_ALIAS("platform:mmp-pcm-audio");