[deliverable/linux.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/control.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
	35	#include <plat/control.h>
	36	#include <plat/dma.h>
	37	#include <plat/mcbsp.h>
	38	#include "mcpdm.h"
db72c2f8 MLC	39	#include "omap-pcm.h"
	40
	41	struct omap_mcpdm_data {
	42	struct omap_mcpdm_link *links;
	43	int active;
	44	};
	45
	46	static struct omap_mcpdm_link omap_mcpdm_links[] = {
	47	/* downlink */
	48	{
	49	.irq_mask = MCPDM_DN_IRQ_EMPTY \| MCPDM_DN_IRQ_FULL,
	50	.threshold = 1,
	51	.format = PDMOUTFORMAT_LJUST,
	52	},
	53	/* uplink */
	54	{
	55	.irq_mask = MCPDM_UP_IRQ_EMPTY \| MCPDM_UP_IRQ_FULL,
	56	.threshold = 1,
	57	.format = PDMOUTFORMAT_LJUST,
	58	},
	59	};
	60
	61	static struct omap_mcpdm_data mcpdm_data = {
	62	.links = omap_mcpdm_links,
	63	.active = 0,
	64	};
	65
	66	/*
	67	* Stream DMA parameters
	68	*/
	69	static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
	70	{
	71	.name = "Audio playback",
	72	.dma_req = OMAP44XX_DMA_MCPDM_DL,
	73	.data_type = OMAP_DMA_DATA_TYPE_S32,
	74	.sync_mode = OMAP_DMA_SYNC_PACKET,
	75	.packet_size = 16,
	76	.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
	77	},
	78	{
	79	.name = "Audio capture",
	80	.dma_req = OMAP44XX_DMA_MCPDM_UP,
	81	.data_type = OMAP_DMA_DATA_TYPE_S32,
	82	.sync_mode = OMAP_DMA_SYNC_PACKET,
	83	.packet_size = 16,
	84	.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA,
	85	},
	86	};
	87
	88	static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
	89	struct snd_soc_dai *dai)
	90	{
db72c2f8 MLC	91	int err = 0;
db72c2f8 MLC	92
f0fba2ad	93	if (!dai->active)
db72c2f8 MLC	94	err = omap_mcpdm_request();
	95
	96	return err;
	97	}
	98
	99	static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
	100	struct snd_soc_dai *dai)
	101	{
f0fba2ad	102	if (!dai->active)
db72c2f8 MLC	103	omap_mcpdm_free();
	104	}
	105
	106	static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
	107	struct snd_soc_dai *dai)
	108	{
f0fba2ad	109	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
db72c2f8 MLC	110	int stream = substream->stream;
	111	int err = 0;
	112
	113	switch (cmd) {
	114	case SNDRV_PCM_TRIGGER_START:
	115	case SNDRV_PCM_TRIGGER_RESUME:
	116	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	117	if (!mcpdm_priv->active++)
	118	omap_mcpdm_start(stream);
	119	break;
	120
	121	case SNDRV_PCM_TRIGGER_STOP:
	122	case SNDRV_PCM_TRIGGER_SUSPEND:
	123	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	124	if (!--mcpdm_priv->active)
	125	omap_mcpdm_stop(stream);
	126	break;
	127	default:
	128	err = -EINVAL;
	129	}
	130
	131	return err;
	132	}
	133
	134	static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
	135	struct snd_pcm_hw_params *params,
	136	struct snd_soc_dai *dai)
	137	{
f0fba2ad	138	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
db72c2f8 MLC	139	struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
	140	int stream = substream->stream;
	141	int channels, err, link_mask = 0;
	142
f0fba2ad	143	snd_soc_dai_set_dma_data(dai, substream,
5f712b2b	144	&omap_mcpdm_dai_dma_params[stream]);
db72c2f8 MLC	145
	146	channels = params_channels(params);
	147	switch (channels) {
	148	case 4:
	149	if (stream == SNDRV_PCM_STREAM_CAPTURE)
	150	/* up to 2 channels for capture */
	151	return -EINVAL;
	152	link_mask \|= 1 << 3;
	153	case 3:
	154	if (stream == SNDRV_PCM_STREAM_CAPTURE)
	155	/* up to 2 channels for capture */
	156	return -EINVAL;
	157	link_mask \|= 1 << 2;
	158	case 2:
	159	link_mask \|= 1 << 1;
	160	case 1:
	161	link_mask \|= 1 << 0;
	162	break;
	163	default:
	164	/* unsupported number of channels */
	165	return -EINVAL;
	166	}
	167
	168	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
	169	mcpdm_links[stream].channels = link_mask << 3;
	170	err = omap_mcpdm_playback_open(&mcpdm_links[stream]);
	171	} else {
	172	mcpdm_links[stream].channels = link_mask << 0;
	173	err = omap_mcpdm_capture_open(&mcpdm_links[stream]);
	174	}
	175
	176	return err;
	177	}
	178
	179	static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream,
	180	struct snd_soc_dai *dai)
	181	{
f0fba2ad	182	struct omap_mcpdm_data *mcpdm_priv = snd_soc_dai_get_drvdata(dai);
db72c2f8 MLC	183	struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
	184	int stream = substream->stream;
	185	int err;
	186
	187	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	188	err = omap_mcpdm_playback_close(&mcpdm_links[stream]);
	189	else
	190	err = omap_mcpdm_capture_close(&mcpdm_links[stream]);
	191
	192	return err;
	193	}
	194
	195	static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
	196	.startup = omap_mcpdm_dai_startup,
	197	.shutdown = omap_mcpdm_dai_shutdown,
	198	.trigger = omap_mcpdm_dai_trigger,
	199	.hw_params = omap_mcpdm_dai_hw_params,
	200	.hw_free = omap_mcpdm_dai_hw_free,
	201	};
	202
	203	#define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 \| SNDRV_PCM_RATE_96000)
	204	#define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE)
	205
f0fba2ad LG	206	static int omap_mcpdm_dai_probe(struct snd_soc_dai *dai)
	207	{
	208	snd_soc_dai_set_drvdata(dai, &mcpdm_data);
	209	return 0;
	210	}
	211
	212	static struct snd_soc_dai_driver omap_mcpdm_dai = {
	213	.probe = omap_mcpdm_dai_probe,
db72c2f8 MLC	214	.playback = {
	215	.channels_min = 1,
	216	.channels_max = 4,
	217	.rates = OMAP_MCPDM_RATES,
	218	.formats = OMAP_MCPDM_FORMATS,
	219	},
	220	.capture = {
	221	.channels_min = 1,
	222	.channels_max = 2,
	223	.rates = OMAP_MCPDM_RATES,
	224	.formats = OMAP_MCPDM_FORMATS,
	225	},
	226	.ops = &omap_mcpdm_dai_ops,
db72c2f8	227	};
f0fba2ad LG	228
	229	static __devinit int asoc_mcpdm_probe(struct platform_device *pdev)
	230	{
	231	int ret;
	232
	233	ret = omap_mcpdm_probe(pdev);
	234	if (ret < 0)
	235	return ret;
	236	ret = snd_soc_register_dai(&pdev->dev, &omap_mcpdm_dai);
	237	if (ret < 0)
	238	omap_mcpdm_remove(pdev);
	239	return ret;
	240	}
	241
	242	static int __devexit asoc_mcpdm_remove(struct platform_device *pdev)
	243	{
	244	snd_soc_unregister_dai(&pdev->dev);
	245	omap_mcpdm_remove(pdev);
	246	return 0;
	247	}
	248
	249	static struct platform_driver asoc_mcpdm_driver = {
	250	.driver = {
	251	.name = "omap-mcpdm-dai",
	252	.owner = THIS_MODULE,
	253	},
	254
	255	.probe = asoc_mcpdm_probe,
	256	.remove = __devexit_p(asoc_mcpdm_remove),
	257	};
db72c2f8 MLC	258
	259	static int __init snd_omap_mcpdm_init(void)
	260	{
f0fba2ad	261	return platform_driver_register(&asoc_mcpdm_driver);
db72c2f8 MLC	262	}
	263	module_init(snd_omap_mcpdm_init);
	264
	265	static void __exit snd_omap_mcpdm_exit(void)
	266	{
f0fba2ad	267	platform_driver_unregister(&asoc_mcpdm_driver);
db72c2f8 MLC	268	}
	269	module_exit(snd_omap_mcpdm_exit);
	270
	271	MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
	272	MODULE_DESCRIPTION("OMAP PDM SoC Interface");
	273	MODULE_LICENSE("GPL");