[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 "davinci-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 davinci_pcm_dma_params	dma_params[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, 1);
	else
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);

	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, 0);
	else
		MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);

	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;
	struct davinci_pcm_dma_params *dma_params =
			&davinci_vcif_dev->dma_params[substream->stream];
	u32 w;

	dai->capture_dma_data = davinci_vcif_dev->dma_params;
	dai->playback_dma_data = davinci_vcif_dev->dma_params;

	/* 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:
		dma_params->data_type = 0;

		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:
		dma_params->data_type = 1;

		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:
		dma_params->data_type = 2;

		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;
	}

	dma_params->acnt  = dma_params->data_type;

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

static struct snd_soc_dai_driver davinci_vcif_dai = {
	.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 int davinci_vcif_probe(struct platform_device *pdev)
{
	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
	struct davinci_vcif_dev *davinci_vcif_dev;
	int ret;

	davinci_vcif_dev = kzalloc(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_params[SNDRV_PCM_STREAM_PLAYBACK].channel =
					davinci_vc->davinci_vcif.dma_tx_channel;
	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr =
					davinci_vc->davinci_vcif.dma_tx_addr;

	/* DMA rx params */
	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel =
					davinci_vc->davinci_vcif.dma_rx_channel;
	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr =
					davinci_vc->davinci_vcif.dma_rx_addr;

	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);

	ret = snd_soc_register_dai(&pdev->dev, &davinci_vcif_dai);
	if (ret != 0) {
		dev_err(&pdev->dev, "could not register dai\n");
		goto fail;
	}

	return 0;

fail:
	kfree(davinci_vcif_dev);

	return ret;
}

static int davinci_vcif_remove(struct platform_device *pdev)
{
	snd_soc_unregister_dai(&pdev->dev);

	return 0;
}

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

static int __init davinci_vcif_init(void)
{
	return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe);
}
module_init(davinci_vcif_init);

static void __exit davinci_vcif_exit(void)
{
	platform_driver_unregister(&davinci_vcif_driver);
}
module_exit(davinci_vcif_exit);

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>
	36
	37	#include "davinci-pcm.h"
	38	#include "davinci-i2s.h"
e155fcc2 MA	39
	40	#define MOD_REG_BIT(val, mask, set) do { \
	41	if (set) { \
	42	val \|= mask; \
	43	} else { \
	44	val &= ~mask; \
	45	} \
	46	} while (0)
	47
	48	struct davinci_vcif_dev {
	49	struct davinci_vc *davinci_vc;
	50	struct davinci_pcm_dma_params dma_params[2];
	51	};
	52
	53	static void davinci_vcif_start(struct snd_pcm_substream *substream)
	54	{
	55	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	56	struct davinci_vcif_dev *davinci_vcif_dev =
f0fba2ad	57	snd_soc_dai_get_drvdata(rtd->cpu_dai);
e155fcc2 MA	58	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	59	u32 w;
	60
	61	/* Start the sample generator and enable transmitter/receiver */
	62	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	63
	64	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	65	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
	66	else
	67	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
	68
	69	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	70	}
	71
	72	static void davinci_vcif_stop(struct snd_pcm_substream *substream)
	73	{
	74	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	75	struct davinci_vcif_dev *davinci_vcif_dev =
f0fba2ad	76	snd_soc_dai_get_drvdata(rtd->cpu_dai);
e155fcc2 MA	77	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	78	u32 w;
	79
	80	/* Reset transmitter/receiver and sample rate/frame sync generators */
	81	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	82	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	83	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
	84	else
	85	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
	86
	87	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	88	}
	89
	90	static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
	91	struct snd_pcm_hw_params *params,
	92	struct snd_soc_dai *dai)
	93	{
f0fba2ad	94	struct davinci_vcif_dev *davinci_vcif_dev = snd_soc_dai_get_drvdata(dai);
e155fcc2 MA	95	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	96	struct davinci_pcm_dma_params *dma_params =
	97	&davinci_vcif_dev->dma_params[substream->stream];
	98	u32 w;
	99
f0fba2ad LG	100	dai->capture_dma_data = davinci_vcif_dev->dma_params;
	101	dai->playback_dma_data = davinci_vcif_dev->dma_params;
	102
e155fcc2 MA	103	/* Restart the codec before setup */
	104	davinci_vcif_stop(substream);
	105	davinci_vcif_start(substream);
	106
	107	/* General line settings */
	108	writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
	109
	110	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
	111
	112	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
	113
	114	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	115
	116	/* Determine xfer data type */
	117	switch (params_format(params)) {
	118	case SNDRV_PCM_FORMAT_U8:
	119	dma_params->data_type = 0;
	120
	121	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	122	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	123	DAVINCI_VC_CTRL_WD_BITS_8 \|
	124	DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
	125	break;
	126	case SNDRV_PCM_FORMAT_S8:
	127	dma_params->data_type = 1;
	128
	129	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	130	DAVINCI_VC_CTRL_WD_BITS_8, 1);
	131
	132	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED \|
	133	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	134	break;
	135	case SNDRV_PCM_FORMAT_S16_LE:
	136	dma_params->data_type = 2;
	137
	138	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	139	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	140	DAVINCI_VC_CTRL_WD_BITS_8 \|
	141	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	142	break;
	143	default:
	144	printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
	145	return -EINVAL;
	146	}
	147
	148	dma_params->acnt = dma_params->data_type;
	149
	150	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	151
	152	return 0;
	153	}
	154
	155	static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
	156	struct snd_soc_dai *dai)
	157	{
	158	int ret = 0;
	159
	160	switch (cmd) {
	161	case SNDRV_PCM_TRIGGER_START:
	162	case SNDRV_PCM_TRIGGER_RESUME:
	163	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	164	davinci_vcif_start(substream);
	165	case SNDRV_PCM_TRIGGER_STOP:
	166	case SNDRV_PCM_TRIGGER_SUSPEND:
167	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
168	davinci_vcif_stop(substream);
169	break;
170	default:
171	ret = -EINVAL;
172	}
173
174	return ret;
175	}
176
177	#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
178
179	static struct snd_soc_dai_ops davinci_vcif_dai_ops = {
180	.trigger = davinci_vcif_trigger,
181	.hw_params = davinci_vcif_hw_params,
182	};
183
f0fba2ad	184	static struct snd_soc_dai_driver davinci_vcif_dai = {
e155fcc2 MA	185	.playback = {
	186	.channels_min = 1,
	187	.channels_max = 2,
	188	.rates = DAVINCI_VCIF_RATES,
	189	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	190	.capture = {
	191	.channels_min = 1,
	192	.channels_max = 2,
	193	.rates = DAVINCI_VCIF_RATES,
	194	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	195	.ops = &davinci_vcif_dai_ops,
	196
	197	};
e155fcc2 MA	198
	199	static int davinci_vcif_probe(struct platform_device *pdev)
	200	{
	201	struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
	202	struct davinci_vcif_dev *davinci_vcif_dev;
	203	int ret;
	204
	205	davinci_vcif_dev = kzalloc(sizeof(struct davinci_vcif_dev), GFP_KERNEL);
55938b10	206	if (!davinci_vcif_dev) {
e155fcc2 MA	207	dev_dbg(&pdev->dev,
	208	"could not allocate memory for private data\n");
	209	return -ENOMEM;
	210	}
	211
	212	/* DMA tx params */
	213	davinci_vcif_dev->davinci_vc = davinci_vc;
	214	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel =
	215	davinci_vc->davinci_vcif.dma_tx_channel;
	216	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr =
	217	davinci_vc->davinci_vcif.dma_tx_addr;
	218
	219	/* DMA rx params */
	220	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel =
	221	davinci_vc->davinci_vcif.dma_rx_channel;
	222	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr =
	223	davinci_vc->davinci_vcif.dma_rx_addr;
	224
f0fba2ad	225	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);
e155fcc2	226
f0fba2ad	227	ret = snd_soc_register_dai(&pdev->dev, &davinci_vcif_dai);
e155fcc2 MA	228	if (ret != 0) {
	229	dev_err(&pdev->dev, "could not register dai\n");
	230	goto fail;
	231	}
	232
	233	return 0;
	234
	235	fail:
	236	kfree(davinci_vcif_dev);
	237
	238	return ret;
	239	}
	240
	241	static int davinci_vcif_remove(struct platform_device *pdev)
	242	{
f0fba2ad	243	snd_soc_unregister_dai(&pdev->dev);
e155fcc2 MA	244
	245	return 0;
	246	}
	247
	248	static struct platform_driver davinci_vcif_driver = {
	249	.probe = davinci_vcif_probe,
	250	.remove = davinci_vcif_remove,
	251	.driver = {
f0fba2ad	252	.name = "davinci-vcif",
e155fcc2 MA	253	.owner = THIS_MODULE,
	254	},
	255	};
	256
	257	static int __init davinci_vcif_init(void)
	258	{
	259	return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe);
	260	}
	261	module_init(davinci_vcif_init);
	262
	263	static void __exit davinci_vcif_exit(void)
	264	{
	265	platform_driver_unregister(&davinci_vcif_driver);
	266	}
	267	module_exit(davinci_vcif_exit);
	268
	269	MODULE_AUTHOR("Miguel Aguilar");
	270	MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
	271	MODULE_LICENSE("GPL");