[deliverable/linux.git] / sound / soc / davinci / davinci-vcif.c

/*
 * ALSA SoC Voice Codec Interface for TI DAVINCI processor
 *
 * Copyright (C) 2010 Texas Instruments.
 *
 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
 *
 * 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.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/mfd/davinci_voicecodec.h>

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

#include "edma-pcm.h"
#include "davinci-i2s.h"

#define MOD_REG_BIT(val, mask, set) do { \
	if (set) { \
		val |= mask; \
	} else { \
		val &= ~mask; \
	} \
} while (0)

struct davinci_vcif_dev {
	struct davinci_vc *davinci_vc;
	struct snd_dmaengine_dai_dma_data dma_data[2];
	int dma_request[2];
};

static void davinci_vcif_start(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct davinci_vcif_dev *davinci_vcif_dev =
			snd_soc_dai_get_drvdata(rtd->cpu_dai);
	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	u32 w;

	/* Start the sample generator and enable transmitter/receiver */
	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);

	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
	else
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);

	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
}

static void davinci_vcif_stop(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct davinci_vcif_dev *davinci_vcif_dev =
			snd_soc_dai_get_drvdata(rtd->cpu_dai);
	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	u32 w;

	/* Reset transmitter/receiver and sample rate/frame sync generators */
	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
	else
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);

	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
}

static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
				  struct snd_pcm_hw_params *params,
				  struct snd_soc_dai *dai)
{
	struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai);
	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	u32 w;

	/* Restart the codec before setup */
	davinci_vcif_stop(substream);
	davinci_vcif_start(substream);

	/* General line settings */
	writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);

	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);

	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);

	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);

	/* Determine xfer data type */
	switch (params_format(params)) {
	case SNDRV_PCM_FORMAT_U8:
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
			    DAVINCI_VC_CTRL_RD_UNSIGNED |
			    DAVINCI_VC_CTRL_WD_BITS_8 |
			    DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
		break;
	case SNDRV_PCM_FORMAT_S8:
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
			    DAVINCI_VC_CTRL_WD_BITS_8, 1);

		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED |
			    DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
		break;
	case SNDRV_PCM_FORMAT_S16_LE:
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 |
			    DAVINCI_VC_CTRL_RD_UNSIGNED |
			    DAVINCI_VC_CTRL_WD_BITS_8 |
			    DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
		break;
	default:
		printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
		return -EINVAL;
	}

	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);

	return 0;
}

static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
				struct snd_soc_dai *dai)
{
	int ret = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		davinci_vcif_start(substream);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		davinci_vcif_stop(substream);
		break;
	default:
		ret = -EINVAL;
	}

	return ret;
}

#define DAVINCI_VCIF_RATES	SNDRV_PCM_RATE_8000_48000

static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
	.trigger	= davinci_vcif_trigger,
	.hw_params	= davinci_vcif_hw_params,
};

static int davinci_vcif_dai_probe(struct snd_soc_dai *dai)
{
	struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);

	dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
	dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE];

	return 0;
}

static struct snd_soc_dai_driver davinci_vcif_dai = {
	.probe = davinci_vcif_dai_probe,
	.playback = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = DAVINCI_VCIF_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.capture = {
		.channels_min = 1,
		.channels_max = 2,
		.rates = DAVINCI_VCIF_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	.ops = &davinci_vcif_dai_ops,

};

static const struct snd_soc_component_driver davinci_vcif_component = {
	.name		= "davinci-vcif",
};

static int davinci_vcif_probe(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc = pdev->dev.platform_data;
	struct davinci_vcif_dev *davinci_vcif_dev;
	int ret;

	davinci_vcif_dev = devm_kzalloc(&pdev->dev,
					sizeof(struct davinci_vcif_dev),
					GFP_KERNEL);
	if (!davinci_vcif_dev) {
		dev_dbg(&pdev->dev,
			"could not allocate memory for private data\n");
		return -ENOMEM;
	}

	/* DMA tx params */
	davinci_vcif_dev->davinci_vc = davinci_vc;
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data =
				&davinci_vc->davinci_vcif.dma_tx_channel;
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr =
				davinci_vc->davinci_vcif.dma_tx_addr;

	/* DMA rx params */
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data =
				&davinci_vc->davinci_vcif.dma_rx_channel;
	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr =
				davinci_vc->davinci_vcif.dma_rx_addr;

	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);

	ret = devm_snd_soc_register_component(&pdev->dev,
					      &davinci_vcif_component,
					      &davinci_vcif_dai, 1);
	if (ret != 0) {
		dev_err(&pdev->dev, "could not register dai\n");
		return ret;
	}

	ret = edma_pcm_platform_register(&pdev->dev);
	if (ret) {
		dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
		return ret;
	}

	return 0;
}

static struct platform_driver davinci_vcif_driver = {
	.probe		= davinci_vcif_probe,
	.driver		= {
		.name	= "davinci-vcif",
	},
};

module_platform_driver(davinci_vcif_driver);

MODULE_AUTHOR("Miguel Aguilar");
MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
MODULE_LICENSE("GPL");
Commit	Line	Data
e155fcc2 MA	1	/*
	2	* ALSA SoC Voice Codec Interface for TI DAVINCI processor
	3	*
	4	* Copyright (C) 2010 Texas Instruments.
	5	*
	6	* Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*/
	22
	23	#include <linux/init.h>
	24	#include <linux/module.h>
	25	#include <linux/device.h>
	26	#include <linux/delay.h>
923a0042	27	#include <linux/slab.h>
e155fcc2 MA	28	#include <linux/io.h>
	29	#include <linux/mfd/davinci_voicecodec.h>
	30
	31	#include <sound/core.h>
	32	#include <sound/pcm.h>
	33	#include <sound/pcm_params.h>
	34	#include <sound/initval.h>
	35	#include <sound/soc.h>
62731d33	36	#include <sound/dmaengine_pcm.h>
e155fcc2	37
62731d33	38	#include "edma-pcm.h"
e155fcc2	39	#include "davinci-i2s.h"
e155fcc2 MA	40
	41	#define MOD_REG_BIT(val, mask, set) do { \
	42	if (set) { \
	43	val \|= mask; \
	44	} else { \
	45	val &= ~mask; \
	46	} \
	47	} while (0)
	48
	49	struct davinci_vcif_dev {
	50	struct davinci_vc *davinci_vc;
62731d33 PU	51	struct snd_dmaengine_dai_dma_data dma_data[2];
62731d33 PU	52	int dma_request[2];
e155fcc2 MA	53	};
	54
	55	static void davinci_vcif_start(struct snd_pcm_substream *substream)
	56	{
	57	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	58	struct davinci_vcif_dev *davinci_vcif_dev =
f0fba2ad	59	snd_soc_dai_get_drvdata(rtd->cpu_dai);
e155fcc2 MA	60	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	61	u32 w;
	62
	63	/* Start the sample generator and enable transmitter/receiver */
	64	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	65
	66	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3012f43e	67	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
e155fcc2	68	else
3012f43e	69	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
e155fcc2 MA	70
	71	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	72	}
	73
	74	static void davinci_vcif_stop(struct snd_pcm_substream *substream)
	75	{
	76	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	77	struct davinci_vcif_dev *davinci_vcif_dev =
f0fba2ad	78	snd_soc_dai_get_drvdata(rtd->cpu_dai);
e155fcc2 MA	79	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	80	u32 w;
	81
	82	/* Reset transmitter/receiver and sample rate/frame sync generators */
	83	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	84	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
3012f43e	85	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
e155fcc2	86	else
3012f43e	87	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
e155fcc2 MA	88
	89	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	90	}
	91
	92	static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
	93	struct snd_pcm_hw_params *params,
	94	struct snd_soc_dai *dai)
	95	{
f0fba2ad	96	struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai);
e155fcc2	97	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
e155fcc2 MA	98	u32 w;
	99
	100	/* Restart the codec before setup */
	101	davinci_vcif_stop(substream);
	102	davinci_vcif_start(substream);
	103
	104	/* General line settings */
	105	writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
	106
	107	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
	108
	109	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
	110
	111	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	112
	113	/* Determine xfer data type */
	114	switch (params_format(params)) {
	115	case SNDRV_PCM_FORMAT_U8:
e155fcc2 MA	116	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	117	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	118	DAVINCI_VC_CTRL_WD_BITS_8 \|
	119	DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
	120	break;
	121	case SNDRV_PCM_FORMAT_S8:
e155fcc2 MA	122	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	123	DAVINCI_VC_CTRL_WD_BITS_8, 1);
	124
	125	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED \|
	126	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	127	break;
	128	case SNDRV_PCM_FORMAT_S16_LE:
e155fcc2 MA	129	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	130	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	131	DAVINCI_VC_CTRL_WD_BITS_8 \|
	132	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	133	break;
	134	default:
	135	printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
	136	return -EINVAL;
	137	}
	138
e155fcc2 MA	139	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	140
	141	return 0;
	142	}
	143
	144	static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
	145	struct snd_soc_dai *dai)
	146	{
	147	int ret = 0;
	148
	149	switch (cmd) {
	150	case SNDRV_PCM_TRIGGER_START:
	151	case SNDRV_PCM_TRIGGER_RESUME:
	152	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	153	davinci_vcif_start(substream);
82d1d521	154	break;
e155fcc2 MA	155	case SNDRV_PCM_TRIGGER_STOP:
	156	case SNDRV_PCM_TRIGGER_SUSPEND:
	157	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	158	davinci_vcif_stop(substream);
	159	break;
	160	default:
	161	ret = -EINVAL;
	162	}
	163
	164	return ret;
	165	}
	166
	167	#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
	168
85e7652d	169	static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
e155fcc2 MA	170	.trigger = davinci_vcif_trigger,
	171	.hw_params = davinci_vcif_hw_params,
	172	};
	173
62731d33 PU	174	static int davinci_vcif_dai_probe(struct snd_soc_dai *dai)
	175	{
	176	struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);
	177
	178	dai->playback_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK];
	179	dai->capture_dma_data = &dev->dma_data[SNDRV_PCM_STREAM_CAPTURE];
	180
	181	return 0;
	182	}
	183
f0fba2ad	184	static struct snd_soc_dai_driver davinci_vcif_dai = {
62731d33	185	.probe = davinci_vcif_dai_probe,
e155fcc2 MA	186	.playback = {
	187	.channels_min = 1,
	188	.channels_max = 2,
	189	.rates = DAVINCI_VCIF_RATES,
	190	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	191	.capture = {
	192	.channels_min = 1,
	193	.channels_max = 2,
	194	.rates = DAVINCI_VCIF_RATES,
	195	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	196	.ops = &davinci_vcif_dai_ops,
	197
	198	};
e155fcc2	199
ee226ce1 KM	200	static const struct snd_soc_component_driver davinci_vcif_component = {
	201	.name = "davinci-vcif",
	202	};
	203
e155fcc2 MA	204	static int davinci_vcif_probe(struct platform_device *pdev)
e155fcc2 MA	205	{
cb5811cf	206	struct davinci_vc *davinci_vc = pdev->dev.platform_data;
e155fcc2 MA	207	struct davinci_vcif_dev *davinci_vcif_dev;
	208	int ret;
	209
a3bb8f3f JL	210	davinci_vcif_dev = devm_kzalloc(&pdev->dev,
	211	sizeof(struct davinci_vcif_dev),
	212	GFP_KERNEL);
55938b10	213	if (!davinci_vcif_dev) {
e155fcc2 MA	214	dev_dbg(&pdev->dev,
	215	"could not allocate memory for private data\n");
	216	return -ENOMEM;
	217	}
	218
	219	/* DMA tx params */
	220	davinci_vcif_dev->davinci_vc = davinci_vc;
62731d33 PU	221	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].filter_data =
	222	&davinci_vc->davinci_vcif.dma_tx_channel;
	223	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_PLAYBACK].addr =
	224	davinci_vc->davinci_vcif.dma_tx_addr;
e155fcc2 MA	225
e155fcc2 MA	226	/* DMA rx params */
62731d33 PU	227	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].filter_data =
	228	&davinci_vc->davinci_vcif.dma_rx_channel;
	229	davinci_vcif_dev->dma_data[SNDRV_PCM_STREAM_CAPTURE].addr =
	230	davinci_vc->davinci_vcif.dma_rx_addr;
e155fcc2	231
f0fba2ad	232	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);
e155fcc2	233
553de19a VT	234	ret = devm_snd_soc_register_component(&pdev->dev,
	235	&davinci_vcif_component,
	236	&davinci_vcif_dai, 1);
e155fcc2 MA	237	if (ret != 0) {
e155fcc2 MA	238	dev_err(&pdev->dev, "could not register dai\n");
a3bb8f3f	239	return ret;
e155fcc2 MA	240	}
e155fcc2 MA	241
62731d33	242	ret = edma_pcm_platform_register(&pdev->dev);
f08095a4 HG	243	if (ret) {
f08095a4 HG	244	dev_err(&pdev->dev, "register PCM failed: %d\n", ret);
f08095a4 HG	245	return ret;
	246	}
	247
e155fcc2	248	return 0;
e155fcc2 MA	249	}
e155fcc2 MA	250
e155fcc2 MA	251	static struct platform_driver davinci_vcif_driver = {
e155fcc2 MA	252	.probe = davinci_vcif_probe,
e155fcc2	253	.driver = {
f0fba2ad	254	.name = "davinci-vcif",
e155fcc2 MA	255	},
	256	};
	257
f9b8a514	258	module_platform_driver(davinci_vcif_driver);
e155fcc2 MA	259
	260	MODULE_AUTHOR("Miguel Aguilar");
	261	MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
	262	MODULE_LICENSE("GPL");