[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / ep93xx / ep93xx-pcm.c

/*
 * linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
 *
 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
 * Copyright (C) 2006 Applied Data Systems
 *
 * Rewritten for the SoC audio subsystem (Based on PXA2xx code):
 *   Copyright (c) 2008 Ryan Mallon
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>

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

#include <mach/dma.h>
#include <mach/hardware.h>
#include <mach/ep93xx-regs.h>

#include "ep93xx-pcm.h"

static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
	.info			= (SNDRV_PCM_INFO_MMAP		|
				   SNDRV_PCM_INFO_MMAP_VALID	|
				   SNDRV_PCM_INFO_INTERLEAVED	|
				   SNDRV_PCM_INFO_BLOCK_TRANSFER),
				   
	.rates			= SNDRV_PCM_RATE_8000_192000,
	.rate_min		= SNDRV_PCM_RATE_8000,
	.rate_max		= SNDRV_PCM_RATE_192000,
	
	.formats		= (SNDRV_PCM_FMTBIT_S16_LE |
				   SNDRV_PCM_FMTBIT_S24_LE |
				   SNDRV_PCM_FMTBIT_S32_LE),
	
	.buffer_bytes_max	= 131072,
	.period_bytes_min	= 32,
	.period_bytes_max	= 32768,
	.periods_min		= 1,
	.periods_max		= 32,
	.fifo_size		= 32,
};

static bool ep93xx_pcm_dma_filter(struct dma_chan *chan, void *filter_param)
{
	struct ep93xx_dma_data *data = filter_param;

	if (data->direction == ep93xx_dma_chan_direction(chan)) {
		chan->private = data;
		return true;
	}

	return false;
}

static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	struct ep93xx_pcm_dma_params *dma_params;
	struct ep93xx_dma_data *dma_data;
	int ret;

	snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);

	dma_data = kmalloc(sizeof(*dma_data), GFP_KERNEL);
	if (!dma_data)
		return -ENOMEM;

	dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
	dma_data->port = dma_params->dma_port;
	dma_data->name = dma_params->name;
	dma_data->direction = snd_pcm_substream_to_dma_direction(substream);

	ret = snd_dmaengine_pcm_open(substream, ep93xx_pcm_dma_filter, dma_data);
	if (ret) {
		kfree(dma_data);
		return ret;
	}

	snd_dmaengine_pcm_set_data(substream, dma_data);

	return 0;
}

static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
{
	struct dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);

	snd_dmaengine_pcm_close(substream);
	kfree(dma_data);
	return 0;
}

static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params)
{
	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);

	return 0;
}

static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
{
	snd_pcm_set_runtime_buffer(substream, NULL);
	return 0;
}

static int ep93xx_pcm_mmap(struct snd_pcm_substream *substream,
			   struct vm_area_struct *vma)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	return dma_mmap_writecombine(substream->pcm->card->dev, vma,
				     runtime->dma_area,
				     runtime->dma_addr,
				     runtime->dma_bytes);
}

static struct snd_pcm_ops ep93xx_pcm_ops = {
	.open		= ep93xx_pcm_open,
	.close		= ep93xx_pcm_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= ep93xx_pcm_hw_params,
	.hw_free	= ep93xx_pcm_hw_free,
	.trigger	= snd_dmaengine_pcm_trigger,
	.pointer	= snd_dmaengine_pcm_pointer_no_residue,
	.mmap		= ep93xx_pcm_mmap,
};

static int ep93xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
{
	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	struct snd_dma_buffer *buf = &substream->dma_buffer;
	size_t size = ep93xx_pcm_hardware.buffer_bytes_max;

	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	buf->dev.dev = pcm->card->dev;
	buf->private_data = NULL;
	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
					   &buf->addr, GFP_KERNEL);
	buf->bytes = size;

	return (buf->area == NULL) ? -ENOMEM : 0;
}

static void ep93xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
{
	struct snd_pcm_substream *substream;
	struct snd_dma_buffer *buf;
	int stream;

	for (stream = 0; stream < 2; stream++) {		
		substream = pcm->streams[stream].substream;
		if (!substream)
			continue;
		
		buf = &substream->dma_buffer;
		if (!buf->area)
			continue;

		dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area,
				      buf->addr);
		buf->area = NULL;
	}
}

static u64 ep93xx_pcm_dmamask = DMA_BIT_MASK(32);

static int ep93xx_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_pcm *pcm = rtd->pcm;
	int ret = 0;

	if (!card->dev->dma_mask)
		card->dev->dma_mask = &ep93xx_pcm_dmamask;
	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
		ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
					SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
			return ret;
	}

	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
					SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
			return ret;
	}

	return 0;
}

static struct snd_soc_platform_driver ep93xx_soc_platform = {
	.ops		= &ep93xx_pcm_ops,
	.pcm_new	= &ep93xx_pcm_new,
	.pcm_free	= &ep93xx_pcm_free_dma_buffers,
};

static int __devinit ep93xx_soc_platform_probe(struct platform_device *pdev)
{
	return snd_soc_register_platform(&pdev->dev, &ep93xx_soc_platform);
}

static int __devexit ep93xx_soc_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_platform(&pdev->dev);
	return 0;
}

static struct platform_driver ep93xx_pcm_driver = {
	.driver = {
			.name = "ep93xx-pcm-audio",
			.owner = THIS_MODULE,
	},

	.probe = ep93xx_soc_platform_probe,
	.remove = __devexit_p(ep93xx_soc_platform_remove),
};

module_platform_driver(ep93xx_pcm_driver);

MODULE_AUTHOR("Ryan Mallon");
MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:ep93xx-pcm-audio");
Commit	Line	Data
db5bf412 RM	1	/*
	2	* linux/sound/arm/ep93xx-pcm.c - EP93xx ALSA PCM interface
	3	*
	4	* Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
	5	* Copyright (C) 2006 Applied Data Systems
	6	*
	7	* Rewritten for the SoC audio subsystem (Based on PXA2xx code):
1c5454ee	8	* Copyright (c) 2008 Ryan Mallon
db5bf412 RM	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/init.h>
	17	#include <linux/device.h>
	18	#include <linux/slab.h>
51e2cc0c	19	#include <linux/dmaengine.h>
db5bf412 RM	20	#include <linux/dma-mapping.h>
	21
	22	#include <sound/core.h>
	23	#include <sound/pcm.h>
	24	#include <sound/pcm_params.h>
	25	#include <sound/soc.h>
d7a42e10	26	#include <sound/dmaengine_pcm.h>
db5bf412 RM	27
	28	#include <mach/dma.h>
	29	#include <mach/hardware.h>
	30	#include <mach/ep93xx-regs.h>
	31
	32	#include "ep93xx-pcm.h"
	33
	34	static const struct snd_pcm_hardware ep93xx_pcm_hardware = {
	35	.info = (SNDRV_PCM_INFO_MMAP \|
	36	SNDRV_PCM_INFO_MMAP_VALID \|
	37	SNDRV_PCM_INFO_INTERLEAVED \|
	38	SNDRV_PCM_INFO_BLOCK_TRANSFER),
	39
4cfeb695	40	.rates = SNDRV_PCM_RATE_8000_192000,
db5bf412	41	.rate_min = SNDRV_PCM_RATE_8000,
4cfeb695	42	.rate_max = SNDRV_PCM_RATE_192000,
db5bf412 RM	43
	44	.formats = (SNDRV_PCM_FMTBIT_S16_LE \|
	45	SNDRV_PCM_FMTBIT_S24_LE \|
	46	SNDRV_PCM_FMTBIT_S32_LE),
	47
	48	.buffer_bytes_max = 131072,
	49	.period_bytes_min = 32,
	50	.period_bytes_max = 32768,
	51	.periods_min = 1,
	52	.periods_max = 32,
	53	.fifo_size = 32,
	54	};
	55
51e2cc0c	56	static bool ep93xx_pcm_dma_filter(struct dma_chan chan, void filter_param)
db5bf412	57	{
51e2cc0c	58	struct ep93xx_dma_data *data = filter_param;
db5bf412	59
51e2cc0c MW	60	if (data->direction == ep93xx_dma_chan_direction(chan)) {
	61	chan->private = data;
	62	return true;
db5bf412	63	}
51e2cc0c MW	64
51e2cc0c MW	65	return false;
db5bf412 RM	66	}
	67
	68	static int ep93xx_pcm_open(struct snd_pcm_substream *substream)
	69	{
d7a42e10 LPC	70	struct snd_soc_pcm_runtime *rtd = substream->private_data;
d7a42e10 LPC	71	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
db5bf412	72	struct ep93xx_pcm_dma_params *dma_params;
d7a42e10	73	struct ep93xx_dma_data *dma_data;
db5bf412 RM	74	int ret;
db5bf412 RM	75
db5bf412 RM	76	snd_soc_set_runtime_hwparams(substream, &ep93xx_pcm_hardware);
db5bf412 RM	77
d7a42e10 LPC	78	dma_data = kmalloc(sizeof(*dma_data), GFP_KERNEL);
d7a42e10 LPC	79	if (!dma_data)
db5bf412 RM	80	return -ENOMEM;
db5bf412 RM	81
51e2cc0c	82	dma_params = snd_soc_dai_get_dma_data(cpu_dai, substream);
d7a42e10 LPC	83	dma_data->port = dma_params->dma_port;
	84	dma_data->name = dma_params->name;
	85	dma_data->direction = snd_pcm_substream_to_dma_direction(substream);
51e2cc0c	86
d7a42e10 LPC	87	ret = snd_dmaengine_pcm_open(substream, ep93xx_pcm_dma_filter, dma_data);
	88	if (ret) {
	89	kfree(dma_data);
	90	return ret;
db5bf412	91	}
db5bf412	92
d7a42e10	93	snd_dmaengine_pcm_set_data(substream, dma_data);
db5bf412	94
db5bf412 RM	95	return 0;
	96	}
	97
d7a42e10	98	static int ep93xx_pcm_close(struct snd_pcm_substream *substream)
51e2cc0c	99	{
d7a42e10	100	struct dma_data *dma_data = snd_dmaengine_pcm_get_data(substream);
51e2cc0c	101
d7a42e10 LPC	102	snd_dmaengine_pcm_close(substream);
d7a42e10 LPC	103	kfree(dma_data);
51e2cc0c MW	104	return 0;
	105	}
	106
db5bf412 RM	107	static int ep93xx_pcm_hw_params(struct snd_pcm_substream *substream,
	108	struct snd_pcm_hw_params *params)
	109	{
db5bf412	110	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
db5bf412 RM	111
	112	return 0;
	113	}
	114
	115	static int ep93xx_pcm_hw_free(struct snd_pcm_substream *substream)
	116	{
	117	snd_pcm_set_runtime_buffer(substream, NULL);
	118	return 0;
	119	}
	120
db5bf412 RM	121	static int ep93xx_pcm_mmap(struct snd_pcm_substream *substream,
	122	struct vm_area_struct *vma)
	123	{
	124	struct snd_pcm_runtime *runtime = substream->runtime;
	125
	126	return dma_mmap_writecombine(substream->pcm->card->dev, vma,
	127	runtime->dma_area,
	128	runtime->dma_addr,
	129	runtime->dma_bytes);
	130	}
	131
	132	static struct snd_pcm_ops ep93xx_pcm_ops = {
	133	.open = ep93xx_pcm_open,
	134	.close = ep93xx_pcm_close,
	135	.ioctl = snd_pcm_lib_ioctl,
	136	.hw_params = ep93xx_pcm_hw_params,
	137	.hw_free = ep93xx_pcm_hw_free,
d7a42e10	138	.trigger = snd_dmaengine_pcm_trigger,
9883ab22	139	.pointer = snd_dmaengine_pcm_pointer_no_residue,
db5bf412 RM	140	.mmap = ep93xx_pcm_mmap,
	141	};
	142
	143	static int ep93xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
	144	{
	145	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	146	struct snd_dma_buffer *buf = &substream->dma_buffer;
	147	size_t size = ep93xx_pcm_hardware.buffer_bytes_max;
	148
	149	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	150	buf->dev.dev = pcm->card->dev;
	151	buf->private_data = NULL;
	152	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
	153	&buf->addr, GFP_KERNEL);
	154	buf->bytes = size;
	155
	156	return (buf->area == NULL) ? -ENOMEM : 0;
	157	}
	158
	159	static void ep93xx_pcm_free_dma_buffers(struct snd_pcm *pcm)
	160	{
	161	struct snd_pcm_substream *substream;
	162	struct snd_dma_buffer *buf;
	163	int stream;
	164
	165	for (stream = 0; stream < 2; stream++) {
	166	substream = pcm->streams[stream].substream;
	167	if (!substream)
	168	continue;
	169
	170	buf = &substream->dma_buffer;
	171	if (!buf->area)
	172	continue;
	173
	174	dma_free_writecombine(pcm->card->dev, buf->bytes, buf->area,
	175	buf->addr);
	176	buf->area = NULL;
	177	}
	178	}
	179
350e16d5	180	static u64 ep93xx_pcm_dmamask = DMA_BIT_MASK(32);
db5bf412	181
552d1ef6	182	static int ep93xx_pcm_new(struct snd_soc_pcm_runtime *rtd)
db5bf412	183	{
552d1ef6	184	struct snd_card *card = rtd->card->snd_card;
552d1ef6	185	struct snd_pcm *pcm = rtd->pcm;
db5bf412 RM	186	int ret = 0;
	187
	188	if (!card->dev->dma_mask)
	189	card->dev->dma_mask = &ep93xx_pcm_dmamask;
	190	if (!card->dev->coherent_dma_mask)
350e16d5	191	card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
db5bf412	192
25e9e756	193	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
db5bf412 RM	194	ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
	195	SNDRV_PCM_STREAM_PLAYBACK);
	196	if (ret)
	197	return ret;
	198	}
	199
25e9e756	200	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
db5bf412 RM	201	ret = ep93xx_pcm_preallocate_dma_buffer(pcm,
	202	SNDRV_PCM_STREAM_CAPTURE);
	203	if (ret)
	204	return ret;
	205	}
	206
	207	return 0;
	208	}
	209
f0fba2ad LG	210	static struct snd_soc_platform_driver ep93xx_soc_platform = {
f0fba2ad LG	211	.ops = &ep93xx_pcm_ops,
db5bf412 RM	212	.pcm_new = &ep93xx_pcm_new,
	213	.pcm_free = &ep93xx_pcm_free_dma_buffers,
	214	};
f0fba2ad LG	215
	216	static int __devinit ep93xx_soc_platform_probe(struct platform_device *pdev)
	217	{
	218	return snd_soc_register_platform(&pdev->dev, &ep93xx_soc_platform);
	219	}
	220
	221	static int __devexit ep93xx_soc_platform_remove(struct platform_device *pdev)
	222	{
	223	snd_soc_unregister_platform(&pdev->dev);
	224	return 0;
	225	}
	226
	227	static struct platform_driver ep93xx_pcm_driver = {
	228	.driver = {
	229	.name = "ep93xx-pcm-audio",
	230	.owner = THIS_MODULE,
	231	},
	232
	233	.probe = ep93xx_soc_platform_probe,
	234	.remove = __devexit_p(ep93xx_soc_platform_remove),
	235	};
db5bf412	236
ee18f631	237	module_platform_driver(ep93xx_pcm_driver);
db5bf412	238
1c5454ee	239	MODULE_AUTHOR("Ryan Mallon");
db5bf412 RM	240	MODULE_DESCRIPTION("EP93xx ALSA PCM interface");
db5bf412 RM	241	MODULE_LICENSE("GPL");
93068169	242	MODULE_ALIAS("platform:ep93xx-pcm-audio");