[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, 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;
	struct davinci_pcm_dma_params *dma_params =
			&davinci_vcif_dev->dma_params[substream->stream];
	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:
		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);
		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;
}

static int davinci_vcif_startup(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);

	snd_soc_dai_set_dma_data(dai, substream, dev->dma_params);
	return 0;
}

#define DAVINCI_VCIF_RATES	SNDRV_PCM_RATE_8000_48000

static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
	.startup	= davinci_vcif_startup,
	.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 = 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_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");
		return ret;
	}

	return 0;
}

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,
	},
};

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>
	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)
3012f43e	65	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
e155fcc2	66	else
3012f43e	67	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
e155fcc2 MA	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)
3012f43e	83	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
e155fcc2	84	else
3012f43e	85	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
e155fcc2 MA	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
	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:
	116	dma_params->data_type = 0;
	117
	118	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	119	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	120	DAVINCI_VC_CTRL_WD_BITS_8 \|
	121	DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
	122	break;
	123	case SNDRV_PCM_FORMAT_S8:
	124	dma_params->data_type = 1;
	125
	126	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	127	DAVINCI_VC_CTRL_WD_BITS_8, 1);
	128
	129	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED \|
	130	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	131	break;
	132	case SNDRV_PCM_FORMAT_S16_LE:
	133	dma_params->data_type = 2;
	134
	135	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
	136	DAVINCI_VC_CTRL_RD_UNSIGNED \|
	137	DAVINCI_VC_CTRL_WD_BITS_8 \|
	138	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
	139	break;
	140	default:
	141	printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
	142	return -EINVAL;
	143	}
	144
	145	dma_params->acnt = dma_params->data_type;
	146
	147	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	148
	149	return 0;
	150	}
	151
	152	static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
	153	struct snd_soc_dai *dai)
	154	{
	155	int ret = 0;
	156
	157	switch (cmd) {
	158	case SNDRV_PCM_TRIGGER_START:
159	case SNDRV_PCM_TRIGGER_RESUME:
160	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
161	davinci_vcif_start(substream);
82d1d521	162	break;
e155fcc2 MA	163	case SNDRV_PCM_TRIGGER_STOP:
	164	case SNDRV_PCM_TRIGGER_SUSPEND:
	165	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	166	davinci_vcif_stop(substream);
	167	break;
	168	default:
	169	ret = -EINVAL;
	170	}
	171
	172	return ret;
	173	}
	174
bedad0ca CPE	175	static int davinci_vcif_startup(struct snd_pcm_substream *substream,
	176	struct snd_soc_dai *dai)
	177	{
	178	struct davinci_vcif_dev *dev = snd_soc_dai_get_drvdata(dai);
	179
	180	snd_soc_dai_set_dma_data(dai, substream, dev->dma_params);
	181	return 0;
	182	}
	183
e155fcc2 MA	184	#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
e155fcc2 MA	185
85e7652d	186	static const struct snd_soc_dai_ops davinci_vcif_dai_ops = {
bedad0ca	187	.startup = davinci_vcif_startup,
e155fcc2 MA	188	.trigger = davinci_vcif_trigger,
	189	.hw_params = davinci_vcif_hw_params,
	190	};
	191
f0fba2ad	192	static struct snd_soc_dai_driver davinci_vcif_dai = {
e155fcc2 MA	193	.playback = {
	194	.channels_min = 1,
	195	.channels_max = 2,
	196	.rates = DAVINCI_VCIF_RATES,
	197	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	198	.capture = {
	199	.channels_min = 1,
	200	.channels_max = 2,
	201	.rates = DAVINCI_VCIF_RATES,
	202	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
	203	.ops = &davinci_vcif_dai_ops,
	204
	205	};
e155fcc2 MA	206
	207	static int davinci_vcif_probe(struct platform_device *pdev)
	208	{
cb5811cf	209	struct davinci_vc *davinci_vc = pdev->dev.platform_data;
e155fcc2 MA	210	struct davinci_vcif_dev *davinci_vcif_dev;
	211	int ret;
	212
a3bb8f3f JL	213	davinci_vcif_dev = devm_kzalloc(&pdev->dev,
	214	sizeof(struct davinci_vcif_dev),
	215	GFP_KERNEL);
55938b10	216	if (!davinci_vcif_dev) {
e155fcc2 MA	217	dev_dbg(&pdev->dev,
	218	"could not allocate memory for private data\n");
	219	return -ENOMEM;
	220	}
	221
	222	/* DMA tx params */
	223	davinci_vcif_dev->davinci_vc = davinci_vc;
	224	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].channel =
	225	davinci_vc->davinci_vcif.dma_tx_channel;
	226	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_PLAYBACK].dma_addr =
	227	davinci_vc->davinci_vcif.dma_tx_addr;
	228
	229	/* DMA rx params */
	230	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].channel =
	231	davinci_vc->davinci_vcif.dma_rx_channel;
	232	davinci_vcif_dev->dma_params[SNDRV_PCM_STREAM_CAPTURE].dma_addr =
	233	davinci_vc->davinci_vcif.dma_rx_addr;
	234
f0fba2ad	235	dev_set_drvdata(&pdev->dev, davinci_vcif_dev);
e155fcc2	236
f0fba2ad	237	ret = snd_soc_register_dai(&pdev->dev, &davinci_vcif_dai);
e155fcc2 MA	238	if (ret != 0) {
e155fcc2 MA	239	dev_err(&pdev->dev, "could not register dai\n");
a3bb8f3f	240	return ret;
e155fcc2 MA	241	}
	242
	243	return 0;
e155fcc2 MA	244	}
	245
	246	static int davinci_vcif_remove(struct platform_device *pdev)
	247	{
f0fba2ad	248	snd_soc_unregister_dai(&pdev->dev);
e155fcc2 MA	249
	250	return 0;
	251	}
	252
	253	static struct platform_driver davinci_vcif_driver = {
	254	.probe = davinci_vcif_probe,
	255	.remove = davinci_vcif_remove,
	256	.driver = {
f0fba2ad	257	.name = "davinci-vcif",
e155fcc2 MA	258	.owner = THIS_MODULE,
	259	},
	260	};
	261
f9b8a514	262	module_platform_driver(davinci_vcif_driver);
e155fcc2 MA	263
	264	MODULE_AUTHOR("Miguel Aguilar");
	265	MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
	266	MODULE_LICENSE("GPL");