[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>

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