[net-next-2.6.git] / sound / soc / omap / omap-mcpdm.c

/*
 * omap-mcpdm.c  --  OMAP ALSA SoC DAI driver using McPDM port
 *
 * Copyright (C) 2009 Texas Instruments
 *
 * Author: Misael Lopez Cruz <x0052729@ti.com>
 * Contact: Jorge Eduardo Candelaria <x0107209@ti.com>
 *          Margarita Olaya <magi.olaya@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/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>

#include <plat/dma.h>
#include <plat/mcbsp.h>
#include "mcpdm.h"
#include "omap-pcm.h"

struct omap_mcpdm_data {
	struct omap_mcpdm_link *links;
	int active;
};

static struct omap_mcpdm_link omap_mcpdm_links[] = {
	/* downlink */
	{
		.irq_mask = MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL,
		.threshold = 1,
		.format = PDMOUTFORMAT_LJUST,
	},
	/* uplink */
	{
		.irq_mask = MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL,
		.threshold = 1,
		.format = PDMOUTFORMAT_LJUST,
	},
};

static struct omap_mcpdm_data mcpdm_data = {
	.links = omap_mcpdm_links,
	.active = 0,
};

/*
 * Stream DMA parameters
 */
static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
	{
		.name = "Audio playback",
		.dma_req = OMAP44XX_DMA_MCPDM_DL,
		.data_type = OMAP_DMA_DATA_TYPE_S32,
		.sync_mode = OMAP_DMA_SYNC_PACKET,
		.packet_size = 16,
		.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
	},
	{
		.name = "Audio capture",
		.dma_req = OMAP44XX_DMA_MCPDM_UP,
		.data_type = OMAP_DMA_DATA_TYPE_S32,
		.sync_mode = OMAP_DMA_SYNC_PACKET,
		.packet_size = 16,
		.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA,
	},
};

static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
				  struct snd_soc_dai *dai)
{
	int err = 0;

	if (!dai->active)
		err = omap_mcpdm_request();

	return err;
}

static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
				    struct snd_soc_dai *dai)
{
	if (!dai->active)
		omap_mcpdm_free();
}

static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
				  struct snd_soc_dai *dai)
{
	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
	int stream = substream->stream;
	int err = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		if (!mcpdm_priv->active++)
			omap_mcpdm_start(stream);
		break;

	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		if (!--mcpdm_priv->active)
			omap_mcpdm_stop(stream);
		break;
	default:
		err = -EINVAL;
	}

	return err;
}

static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
				    struct snd_pcm_hw_params *params,
				    struct snd_soc_dai *dai)
{
	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
	struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
	int stream = substream->stream;
	int channels, err, link_mask = 0;

	snd_soc_dai_set_dma_data(dai, substream,
				 &omap_mcpdm_dai_dma_params[stream]);

	channels = params_channels(params);
	switch (channels) {
	case 4:
		if (stream == SNDRV_PCM_STREAM_CAPTURE)
			/* up to 2 channels for capture */
			return -EINVAL;
		link_mask |= 1 << 3;
	case 3:
		if (stream == SNDRV_PCM_STREAM_CAPTURE)
			/* up to 2 channels for capture */
			return -EINVAL;
		link_mask |= 1 << 2;
	case 2:
		link_mask |= 1 << 1;
	case 1:
		link_mask |= 1 << 0;
		break;
	default:
		/* unsupported number of channels */
		return -EINVAL;
	}

	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
		mcpdm_links[stream].channels = link_mask << 3;
		err = omap_mcpdm_playback_open(&mcpdm_links[stream]);
	} else {
		mcpdm_links[stream].channels = link_mask << 0;
		err = omap_mcpdm_capture_open(&mcpdm_links[stream]);
	}

	return err;
}

static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream,
				  struct snd_soc_dai *dai)
{
	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
	struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
	int stream = substream->stream;
	int err;

	if (substream->stream ==  SNDRV_PCM_STREAM_PLAYBACK)
		err = omap_mcpdm_playback_close(&mcpdm_links[stream]);
	else
		err = omap_mcpdm_capture_close(&mcpdm_links[stream]);

	return err;
}

static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
	.startup	= omap_mcpdm_dai_startup,
	.shutdown	= omap_mcpdm_dai_shutdown,
	.trigger	= omap_mcpdm_dai_trigger,
	.hw_params	= omap_mcpdm_dai_hw_params,
	.hw_free	= omap_mcpdm_dai_hw_free,
};

#define OMAP_MCPDM_RATES	(SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define OMAP_MCPDM_FORMATS	(SNDRV_PCM_FMTBIT_S32_LE)

static int omap_mcpdm_dai_probe(struct snd_soc_dai *dai)
{
	snd_soc_dai_set_drvdata(dai, &mcpdm_data);
	return 0;
}

static struct snd_soc_dai_driver omap_mcpdm_dai = {
	.probe = omap_mcpdm_dai_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 4,
		.rates = OMAP_MCPDM_RATES,
		.formats = OMAP_MCPDM_FORMATS,
	},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = OMAP_MCPDM_RATES,
		.formats = OMAP_MCPDM_FORMATS,
	},
	.ops = &omap_mcpdm_dai_ops,
};

static __devinit int asoc_mcpdm_probe(struct platform_device *pdev)
{
	int ret;

	ret = omap_mcpdm_probe(pdev);
	if (ret < 0)
		return ret;
	ret = snd_soc_register_dai(&pdev->dev, &omap_mcpdm_dai);
	if (ret < 0)
		omap_mcpdm_remove(pdev);
	return ret;
}

static int __devexit asoc_mcpdm_remove(struct platform_device *pdev)
{
	snd_soc_unregister_dai(&pdev->dev);
	omap_mcpdm_remove(pdev);
	return 0;
}

static struct platform_driver asoc_mcpdm_driver = {
	.driver = {
			.name = "omap-mcpdm-dai",
			.owner = THIS_MODULE,
	},

	.probe = asoc_mcpdm_probe,
	.remove = __devexit_p(asoc_mcpdm_remove),
};

static int __init snd_omap_mcpdm_init(void)
{
	return platform_driver_register(&asoc_mcpdm_driver);
}
module_init(snd_omap_mcpdm_init);

static void __exit snd_omap_mcpdm_exit(void)
{
	platform_driver_unregister(&asoc_mcpdm_driver);
}
module_exit(snd_omap_mcpdm_exit);

MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
MODULE_DESCRIPTION("OMAP PDM SoC Interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
db72c2f8 MLC	1	/*
	2	* omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port
	3	*
	4	* Copyright (C) 2009 Texas Instruments
	5	*
	6	* Author: Misael Lopez Cruz <x0052729@ti.com>
	7	* Contact: Jorge Eduardo Candelaria <x0107209@ti.com>
	8	* Margarita Olaya <magi.olaya@ti.com>
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public License
	12	* version 2 as published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	22	* 02110-1301 USA
	23	*
	24	*/
	25
	26	#include <linux/init.h>
	27	#include <linux/module.h>
	28	#include <linux/device.h>
	29	#include <sound/core.h>
	30	#include <sound/pcm.h>
	31	#include <sound/pcm_params.h>
	32	#include <sound/initval.h>
	33	#include <sound/soc.h>
	34
db72c2f8 MLC	35	#include <plat/dma.h>
	36	#include <plat/mcbsp.h>
	37	#include "mcpdm.h"
db72c2f8 MLC	38	#include "omap-pcm.h"
	39
	40	struct omap_mcpdm_data {
	41	struct omap_mcpdm_link *links;
	42	int active;
	43	};
	44
	45	static struct omap_mcpdm_link omap_mcpdm_links[] = {
	46	/* downlink */
	47	{
	48	.irq_mask = MCPDM_DN_IRQ_EMPTY \| MCPDM_DN_IRQ_FULL,
	49	.threshold = 1,
	50	.format = PDMOUTFORMAT_LJUST,
	51	},
	52	/* uplink */
	53	{
	54	.irq_mask = MCPDM_UP_IRQ_EMPTY \| MCPDM_UP_IRQ_FULL,
	55	.threshold = 1,
	56	.format = PDMOUTFORMAT_LJUST,
	57	},
	58	};
	59
	60	static struct omap_mcpdm_data mcpdm_data = {
	61	.links = omap_mcpdm_links,
	62	.active = 0,
	63	};
	64
	65	/*
	66	* Stream DMA parameters
	67	*/
	68	static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
	69	{
	70	.name = "Audio playback",
	71	.dma_req = OMAP44XX_DMA_MCPDM_DL,
	72	.data_type = OMAP_DMA_DATA_TYPE_S32,
	73	.sync_mode = OMAP_DMA_SYNC_PACKET,
	74	.packet_size = 16,
	75	.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
	76	},
	77	{
	78	.name = "Audio capture",
	79	.dma_req = OMAP44XX_DMA_MCPDM_UP,
	80	.data_type = OMAP_DMA_DATA_TYPE_S32,
	81	.sync_mode = OMAP_DMA_SYNC_PACKET,
	82	.packet_size = 16,
	83	.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA,
	84	},
	85	};
	86
	87	static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
	88	struct snd_soc_dai *dai)
	89	{
db72c2f8 MLC	90	int err = 0;
db72c2f8 MLC	91
f0fba2ad	92	if (!dai->active)
db72c2f8 MLC	93	err = omap_mcpdm_request();
	94
	95	return err;
	96	}
	97
	98	static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
	99	struct snd_soc_dai *dai)
	100	{
f0fba2ad	101	if (!dai->active)
db72c2f8 MLC	102	omap_mcpdm_free();
	103	}
	104
	105	static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	106	struct snd_soc_dai *dai)
	107	{
f0fba2ad	108	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
db72c2f8 MLC	109	int stream = substream->stream;
	110	int err = 0;
	111
	112	switch (cmd) {
	113	case SNDRV_PCM_TRIGGER_START:
	114	case SNDRV_PCM_TRIGGER_RESUME:
	115	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	116	if (!mcpdm_priv->active++)
	117	omap_mcpdm_start(stream);
	118	break;
	119
	120	case SNDRV_PCM_TRIGGER_STOP:
	121	case SNDRV_PCM_TRIGGER_SUSPEND:
	122	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	123	if (!--mcpdm_priv->active)
	124	omap_mcpdm_stop(stream);
	125	break;
	126	default:
	127	err = -EINVAL;
	128	}
	129
	130	return err;
	131	}
	132
	133	static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
	134	struct snd_pcm_hw_params *params,
	135	struct snd_soc_dai *dai)
	136	{
f0fba2ad	137	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
db72c2f8 MLC	138	struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
	139	int stream = substream->stream;
	140	int channels, err, link_mask = 0;
	141
f0fba2ad	142	snd_soc_dai_set_dma_data(dai, substream,
5f712b2b	143	&omap_mcpdm_dai_dma_params[stream]);
db72c2f8 MLC	144
	145	channels = params_channels(params);
	146	switch (channels) {
	147	case 4:
	148	if (stream == SNDRV_PCM_STREAM_CAPTURE)
	149	/* up to 2 channels for capture */
	150	return -EINVAL;
	151	link_mask \|= 1 << 3;
	152	case 3:
	153	if (stream == SNDRV_PCM_STREAM_CAPTURE)
	154	/* up to 2 channels for capture */
	155	return -EINVAL;
	156	link_mask \|= 1 << 2;
	157	case 2:
	158	link_mask \|= 1 << 1;
	159	case 1:
	160	link_mask \|= 1 << 0;
	161	break;
	162	default:
	163	/* unsupported number of channels */
	164	return -EINVAL;
	165	}
	166
	167	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
	168	mcpdm_links[stream].channels = link_mask << 3;
	169	err = omap_mcpdm_playback_open(&mcpdm_links[stream]);
	170	} else {
	171	mcpdm_links[stream].channels = link_mask << 0;
	172	err = omap_mcpdm_capture_open(&mcpdm_links[stream]);
	173	}
	174
	175	return err;
	176	}
	177
	178	static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream,
	179	struct snd_soc_dai *dai)
	180	{
f0fba2ad	181	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
db72c2f8 MLC	182	struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
	183	int stream = substream->stream;
	184	int err;
	185
	186	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	187	err = omap_mcpdm_playback_close(&mcpdm_links[stream]);
	188	else
	189	err = omap_mcpdm_capture_close(&mcpdm_links[stream]);
	190
	191	return err;
	192	}
	193
	194	static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
	195	.startup = omap_mcpdm_dai_startup,
	196	.shutdown = omap_mcpdm_dai_shutdown,
	197	.trigger = omap_mcpdm_dai_trigger,
	198	.hw_params = omap_mcpdm_dai_hw_params,
	199	.hw_free = omap_mcpdm_dai_hw_free,
	200	};
	201
	202	#define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
	203	#define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE)
	204
f0fba2ad LG	205	static int omap_mcpdm_dai_probe(struct snd_soc_dai *dai)
	206	{
	207	snd_soc_dai_set_drvdata(dai, &mcpdm_data);
	208	return 0;
	209	}
	210
	211	static struct snd_soc_dai_driver omap_mcpdm_dai = {
	212	.probe = omap_mcpdm_dai_probe,
db72c2f8 MLC	213	.playback = {
	214	.channels_min = 1,
	215	.channels_max = 4,
	216	.rates = OMAP_MCPDM_RATES,
	217	.formats = OMAP_MCPDM_FORMATS,
	218	},
	219	.capture = {
	220	.channels_min = 1,
	221	.channels_max = 2,
	222	.rates = OMAP_MCPDM_RATES,
	223	.formats = OMAP_MCPDM_FORMATS,
	224	},
	225	.ops = &omap_mcpdm_dai_ops,
db72c2f8	226	};
f0fba2ad LG	227
	228	static __devinit int asoc_mcpdm_probe(struct platform_device *pdev)
	229	{
	230	int ret;
	231
	232	ret = omap_mcpdm_probe(pdev);
	233	if (ret < 0)
	234	return ret;
	235	ret = snd_soc_register_dai(&pdev->dev, &omap_mcpdm_dai);
	236	if (ret < 0)
	237	omap_mcpdm_remove(pdev);
	238	return ret;
	239	}
	240
	241	static int __devexit asoc_mcpdm_remove(struct platform_device *pdev)
	242	{
	243	snd_soc_unregister_dai(&pdev->dev);
	244	omap_mcpdm_remove(pdev);
	245	return 0;
	246	}
	247
	248	static struct platform_driver asoc_mcpdm_driver = {
	249	.driver = {
	250	.name = "omap-mcpdm-dai",
	251	.owner = THIS_MODULE,
	252	},
	253
	254	.probe = asoc_mcpdm_probe,
	255	.remove = __devexit_p(asoc_mcpdm_remove),
	256	};
db72c2f8 MLC	257
	258	static int __init snd_omap_mcpdm_init(void)
	259	{
f0fba2ad	260	return platform_driver_register(&asoc_mcpdm_driver);
db72c2f8 MLC	261	}
	262	module_init(snd_omap_mcpdm_init);
	263
	264	static void __exit snd_omap_mcpdm_exit(void)
	265	{
f0fba2ad	266	platform_driver_unregister(&asoc_mcpdm_driver);
db72c2f8 MLC	267	}
	268	module_exit(snd_omap_mcpdm_exit);
	269
	270	MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
	271	MODULE_DESCRIPTION("OMAP PDM SoC Interface");
	272	MODULE_LICENSE("GPL");