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

/*
 * omap-pcm.c  --  ALSA PCM interface for the OMAP SoC
 *
 * Copyright (C) 2008 Nokia Corporation
 *
 * Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
 *          Peter Ujfalusi <peter.ujfalusi@ti.com>
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/omap-dma.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include <sound/soc.h>

#ifdef CONFIG_ARCH_OMAP1
#define pcm_omap1510()	cpu_is_omap1510()
#else
#define pcm_omap1510()	0
#endif

static const struct snd_pcm_hardware omap_pcm_hardware = {
	.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,
	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
				  SNDRV_PCM_FMTBIT_S32_LE,
	.period_bytes_min	= 32,
	.period_bytes_max	= 64 * 1024,
	.periods_min		= 2,
	.periods_max		= 255,
	.buffer_bytes_max	= 128 * 1024,
};

/* this may get called several times by oss emulation */
static int omap_pcm_hw_params(struct snd_pcm_substream *substream,
			      struct snd_pcm_hw_params *params)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct omap_pcm_dma_data *dma_data;
	struct dma_slave_config config;
	struct dma_chan *chan;
	int err = 0;

	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);

	/* return if this is a bufferless transfer e.g.
	 * codec <--> BT codec or GSM modem -- lg FIXME */
	if (!dma_data)
		return 0;

	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	runtime->dma_bytes = params_buffer_bytes(params);

	chan = snd_dmaengine_pcm_get_chan(substream);
	if (!chan)
		return -EINVAL;

	/* fills in addr_width and direction */
	err = snd_hwparams_to_dma_slave_config(substream, params, &config);
	if (err)
		return err;

	snd_dmaengine_pcm_set_config_from_dai_data(substream,
			snd_soc_dai_get_dma_data(rtd->cpu_dai, substream),
			&config);

	return dmaengine_slave_config(chan, &config);
}

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

static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
{
	snd_pcm_uframes_t offset;

	if (pcm_omap1510())
		offset = snd_dmaengine_pcm_pointer_no_residue(substream);
	else
		offset = snd_dmaengine_pcm_pointer(substream);

	return offset;
}

static int omap_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_dmaengine_dai_dma_data *dma_data;
	int ret;

	snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware);

	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);

	/* DT boot: filter_data is the DMA name */
	if (rtd->cpu_dai->dev->of_node) {
		struct dma_chan *chan;

		chan = dma_request_slave_channel(rtd->cpu_dai->dev,
						 dma_data->filter_data);
		ret = snd_dmaengine_pcm_open(substream, chan);
	} else {
		ret = snd_dmaengine_pcm_open_request_chan(substream,
							  omap_dma_filter_fn,
							  dma_data->filter_data);
	}
	return ret;
}

static int omap_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 omap_pcm_ops = {
	.open		= omap_pcm_open,
	.close		= snd_dmaengine_pcm_close_release_chan,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= omap_pcm_hw_params,
	.hw_free	= omap_pcm_hw_free,
	.trigger	= snd_dmaengine_pcm_trigger,
	.pointer	= omap_pcm_pointer,
	.mmap		= omap_pcm_mmap,
};

static u64 omap_pcm_dmamask = DMA_BIT_MASK(64);

static int omap_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 = omap_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);
	if (!buf->area)
		return -ENOMEM;

	buf->bytes = size;
	return 0;
}

static void omap_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 int omap_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 = &omap_pcm_dmamask;
	if (!card->dev->coherent_dma_mask)
		card->dev->coherent_dma_mask = DMA_BIT_MASK(64);

	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
		ret = omap_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_PLAYBACK);
		if (ret)
			goto out;
	}

	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
		ret = omap_pcm_preallocate_dma_buffer(pcm,
			SNDRV_PCM_STREAM_CAPTURE);
		if (ret)
			goto out;
	}

out:
	/* free preallocated buffers in case of error */
	if (ret)
		omap_pcm_free_dma_buffers(pcm);

	return ret;
}

static struct snd_soc_platform_driver omap_soc_platform = {
	.ops		= &omap_pcm_ops,
	.pcm_new	= omap_pcm_new,
	.pcm_free	= omap_pcm_free_dma_buffers,
};

static int omap_pcm_probe(struct platform_device *pdev)
{
	return snd_soc_register_platform(&pdev->dev,
			&omap_soc_platform);
}

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

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

	.probe = omap_pcm_probe,
	.remove = omap_pcm_remove,
};

module_platform_driver(omap_pcm_driver);

MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
MODULE_DESCRIPTION("OMAP PCM DMA module");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:omap-pcm-audio");
Commit	Line	Data
2e74796a JN	1	/*
	2	* omap-pcm.c -- ALSA PCM interface for the OMAP SoC
	3	*
	4	* Copyright (C) 2008 Nokia Corporation
	5	*
7ec41ee5	6	* Contact: Jarkko Nikula <jarkko.nikula@bitmer.com>
1c7687b9	7	* Peter Ujfalusi <peter.ujfalusi@ti.com>
2e74796a JN	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License
	11	* version 2 as published by the Free Software Foundation.
	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	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	21	* 02110-1301 USA
	22	*
	23	*/
	24
	25	#include <linux/dma-mapping.h>
5a0e3ad6	26	#include <linux/slab.h>
da155d5b	27	#include <linux/module.h>
946cc36a	28	#include <linux/omap-dma.h>
2e74796a JN	29	#include <sound/core.h>
	30	#include <sound/pcm.h>
	31	#include <sound/pcm_params.h>
946cc36a	32	#include <sound/dmaengine_pcm.h>
2e74796a JN	33	#include <sound/soc.h>
2e74796a JN	34
27615a97 TL	35	#ifdef CONFIG_ARCH_OMAP1
	36	#define pcm_omap1510() cpu_is_omap1510()
	37	#else
	38	#define pcm_omap1510() 0
	39	#endif
	40
2e74796a JN	41	static const struct snd_pcm_hardware omap_pcm_hardware = {
	42	.info = SNDRV_PCM_INFO_MMAP \|
	43	SNDRV_PCM_INFO_MMAP_VALID \|
	44	SNDRV_PCM_INFO_INTERLEAVED \|
	45	SNDRV_PCM_INFO_PAUSE \|
b4173824 PU	46	SNDRV_PCM_INFO_RESUME \|
b4173824 PU	47	SNDRV_PCM_INFO_NO_PERIOD_WAKEUP,
e17dd32f MLC	48	.formats = SNDRV_PCM_FMTBIT_S16_LE \|
e17dd32f MLC	49	SNDRV_PCM_FMTBIT_S32_LE,
2e74796a JN	50	.period_bytes_min = 32,
	51	.period_bytes_max = 64 * 1024,
	52	.periods_min = 2,
	53	.periods_max = 255,
	54	.buffer_bytes_max = 128 * 1024,
	55	};
	56
2e74796a JN	57	/* this may get called several times by oss emulation */
	58	static int omap_pcm_hw_params(struct snd_pcm_substream *substream,
	59	struct snd_pcm_hw_params *params)
	60	{
	61	struct snd_pcm_runtime *runtime = substream->runtime;
	62	struct snd_soc_pcm_runtime *rtd = substream->private_data;
5f712b2b	63	struct omap_pcm_dma_data *dma_data;
946cc36a PU	64	struct dma_slave_config config;
946cc36a PU	65	struct dma_chan *chan;
2e74796a JN	66	int err = 0;
2e74796a JN	67
f0fba2ad	68	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
5f712b2b	69
1b4246a1 JS	70	/* return if this is a bufferless transfer e.g.
1b4246a1 JS	71	* codec <--> BT codec or GSM modem -- lg FIXME */
2e74796a	72	if (!dma_data)
1b4246a1	73	return 0;
2e74796a JN	74
	75	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
	76	runtime->dma_bytes = params_buffer_bytes(params);
	77
946cc36a PU	78	chan = snd_dmaengine_pcm_get_chan(substream);
	79	if (!chan)
	80	return -EINVAL;
2e74796a	81
946cc36a PU	82	/* fills in addr_width and direction */
	83	err = snd_hwparams_to_dma_slave_config(substream, params, &config);
	84	if (err)
	85	return err;
2e74796a	86
09ae3aaf LPC	87	snd_dmaengine_pcm_set_config_from_dai_data(substream,
	88	snd_soc_dai_get_dma_data(rtd->cpu_dai, substream),
	89	&config);
2e74796a	90
946cc36a	91	return dmaengine_slave_config(chan, &config);
2e74796a JN	92	}
2e74796a JN	93
946cc36a	94	static int omap_pcm_hw_free(struct snd_pcm_substream *substream)
2e74796a	95	{
946cc36a	96	snd_pcm_set_runtime_buffer(substream, NULL);
2e74796a JN	97	return 0;
	98	}
	99
2e74796a JN	100	static snd_pcm_uframes_t omap_pcm_pointer(struct snd_pcm_substream *substream)
2e74796a JN	101	{
2e74796a JN	102	snd_pcm_uframes_t offset;
2e74796a JN	103
27615a97	104	if (pcm_omap1510())
946cc36a PU	105	offset = snd_dmaengine_pcm_pointer_no_residue(substream);
	106	else
	107	offset = snd_dmaengine_pcm_pointer(substream);
2e74796a JN	108
	109	return offset;
	110	}
	111
	112	static int omap_pcm_open(struct snd_pcm_substream *substream)
	113	{
946cc36a	114	struct snd_soc_pcm_runtime *rtd = substream->private_data;
09ae3aaf	115	struct snd_dmaengine_dai_dma_data *dma_data;
f6becf0b	116	int ret;
2e74796a JN	117
	118	snd_soc_set_runtime_hwparams(substream, &omap_pcm_hardware);
	119
946cc36a	120	dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
a92b5317	121
f6becf0b PU	122	/* DT boot: filter_data is the DMA name */
	123	if (rtd->cpu_dai->dev->of_node) {
	124	struct dma_chan *chan;
	125
	126	chan = dma_request_slave_channel(rtd->cpu_dai->dev,
	127	dma_data->filter_data);
	128	ret = snd_dmaengine_pcm_open(substream, chan);
	129	} else {
	130	ret = snd_dmaengine_pcm_open_request_chan(substream,
	131	omap_dma_filter_fn,
	132	dma_data->filter_data);
	133	}
	134	return ret;
2e74796a JN	135	}
2e74796a JN	136
2e74796a JN	137	static int omap_pcm_mmap(struct snd_pcm_substream *substream,
	138	struct vm_area_struct *vma)
	139	{
	140	struct snd_pcm_runtime *runtime = substream->runtime;
	141
	142	return dma_mmap_writecombine(substream->pcm->card->dev, vma,
	143	runtime->dma_area,
	144	runtime->dma_addr,
	145	runtime->dma_bytes);
	146	}
	147
b2a19d02	148	static struct snd_pcm_ops omap_pcm_ops = {
2e74796a	149	.open = omap_pcm_open,
7c1c1d4a	150	.close = snd_dmaengine_pcm_close_release_chan,
2e74796a JN	151	.ioctl = snd_pcm_lib_ioctl,
	152	.hw_params = omap_pcm_hw_params,
	153	.hw_free = omap_pcm_hw_free,
abe99370	154	.trigger = snd_dmaengine_pcm_trigger,
2e74796a JN	155	.pointer = omap_pcm_pointer,
	156	.mmap = omap_pcm_mmap,
	157	};
	158
a152ff24	159	static u64 omap_pcm_dmamask = DMA_BIT_MASK(64);
2e74796a JN	160
	161	static int omap_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
	162	int stream)
	163	{
	164	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
	165	struct snd_dma_buffer *buf = &substream->dma_buffer;
	166	size_t size = omap_pcm_hardware.buffer_bytes_max;
	167
	168	buf->dev.type = SNDRV_DMA_TYPE_DEV;
	169	buf->dev.dev = pcm->card->dev;
	170	buf->private_data = NULL;
	171	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
	172	&buf->addr, GFP_KERNEL);
	173	if (!buf->area)
	174	return -ENOMEM;
	175
	176	buf->bytes = size;
	177	return 0;
	178	}
	179
	180	static void omap_pcm_free_dma_buffers(struct snd_pcm *pcm)
	181	{
	182	struct snd_pcm_substream *substream;
	183	struct snd_dma_buffer *buf;
	184	int stream;
	185
	186	for (stream = 0; stream < 2; stream++) {
	187	substream = pcm->streams[stream].substream;
	188	if (!substream)
	189	continue;
	190
	191	buf = &substream->dma_buffer;
	192	if (!buf->area)
	193	continue;
	194
	195	dma_free_writecombine(pcm->card->dev, buf->bytes,
	196	buf->area, buf->addr);
	197	buf->area = NULL;
	198	}
	199	}
	200
552d1ef6	201	static int omap_pcm_new(struct snd_soc_pcm_runtime *rtd)
2e74796a	202	{
552d1ef6	203	struct snd_card *card = rtd->card->snd_card;
552d1ef6	204	struct snd_pcm *pcm = rtd->pcm;
2e74796a JN	205	int ret = 0;
	206
	207	if (!card->dev->dma_mask)
	208	card->dev->dma_mask = &omap_pcm_dmamask;
	209	if (!card->dev->coherent_dma_mask)
a152ff24	210	card->dev->coherent_dma_mask = DMA_BIT_MASK(64);
2e74796a	211
25e9e756	212	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
2e74796a JN	213	ret = omap_pcm_preallocate_dma_buffer(pcm,
	214	SNDRV_PCM_STREAM_PLAYBACK);
	215	if (ret)
	216	goto out;
	217	}
	218
25e9e756	219	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
2e74796a JN	220	ret = omap_pcm_preallocate_dma_buffer(pcm,
	221	SNDRV_PCM_STREAM_CAPTURE);
	222	if (ret)
	223	goto out;
	224	}
	225
	226	out:
fad9365b OM	227	/* free preallocated buffers in case of error */
	228	if (ret)
	229	omap_pcm_free_dma_buffers(pcm);
	230
2e74796a JN	231	return ret;
	232	}
	233
f0fba2ad LG	234	static struct snd_soc_platform_driver omap_soc_platform = {
f0fba2ad LG	235	.ops = &omap_pcm_ops,
2e74796a JN	236	.pcm_new = omap_pcm_new,
	237	.pcm_free = omap_pcm_free_dma_buffers,
	238	};
2e74796a	239
7ff60006	240	static int omap_pcm_probe(struct platform_device *pdev)
f0fba2ad LG	241	{
	242	return snd_soc_register_platform(&pdev->dev,
	243	&omap_soc_platform);
	244	}
	245
7ff60006	246	static int omap_pcm_remove(struct platform_device *pdev)
f0fba2ad LG	247	{
	248	snd_soc_unregister_platform(&pdev->dev);
	249	return 0;
	250	}
	251
	252	static struct platform_driver omap_pcm_driver = {
	253	.driver = {
	254	.name = "omap-pcm-audio",
	255	.owner = THIS_MODULE,
	256	},
	257
	258	.probe = omap_pcm_probe,
7ff60006	259	.remove = omap_pcm_remove,
f0fba2ad LG	260	};
f0fba2ad LG	261
beda5bf5	262	module_platform_driver(omap_pcm_driver);
958e792c	263
7ec41ee5	264	MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
2e74796a JN	265	MODULE_DESCRIPTION("OMAP PCM DMA module");
2e74796a JN	266	MODULE_LICENSE("GPL");
5e70b7fc	267	MODULE_ALIAS("platform:omap-pcm-audio");