[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"
#include "davinci-vcif.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 =
					rtd->dai->cpu_dai->private_data;
	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 =
					rtd->dai->cpu_dai->private_data;
	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 = dai->private_data;
	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);
	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,
};

struct snd_soc_dai davinci_vcif_dai = {
	.name = "davinci-vcif",
	.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,

};
EXPORT_SYMBOL_GPL(davinci_vcif_dai);

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_vc) {
		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;

	davinci_vcif_dai.dev = &pdev->dev;
	davinci_vcif_dai.capture.dma_data = davinci_vcif_dev->dma_params;
	davinci_vcif_dai.playback.dma_data = davinci_vcif_dev->dma_params;
	davinci_vcif_dai.private_data = davinci_vcif_dev;

	ret = snd_soc_register_dai(&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(&davinci_vcif_dai);

	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"
	39	#include "davinci-vcif.h"
	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;
	51	struct davinci_pcm_dma_params dma_params[2];
	52	};
	53
	54	static void davinci_vcif_start(struct snd_pcm_substream *substream)
	55	{
	56	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	57	struct davinci_vcif_dev *davinci_vcif_dev =
	58	rtd->dai->cpu_dai->private_data;
	59	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	60	u32 w;
	61
	62	/* Start the sample generator and enable transmitter/receiver */
	63	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	64
	65	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	66	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
	67	else
	68	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
	69
	70	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	71	}
	72
	73	static void davinci_vcif_stop(struct snd_pcm_substream *substream)
	74	{
	75	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	76	struct davinci_vcif_dev *davinci_vcif_dev =
	77	rtd->dai->cpu_dai->private_data;
	78	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
	79	u32 w;
	80
	81	/* Reset transmitter/receiver and sample rate/frame sync generators */
	82	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
	83	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
	84	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
	85	else
	86	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
	87
	88	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
	89	}
	90
	91	static int davinci_vcif_hw_params(struct snd_pcm_substream *substream,
92	struct snd_pcm_hw_params *params,
93	struct snd_soc_dai *dai)
94	{
95	struct davinci_vcif_dev *davinci_vcif_dev = dai->private_data;
96	struct davinci_vc *davinci_vc = davinci_vcif_dev->davinci_vc;
97	struct davinci_pcm_dma_params *dma_params =
98	&davinci_vcif_dev->dma_params[substream->stream];
99	u32 w;
100
101	/* Restart the codec before setup */
102	davinci_vcif_stop(substream);
103	davinci_vcif_start(substream);
104
105	/* General line settings */
106	writel(DAVINCI_VC_CTRL_MASK, davinci_vc->base + DAVINCI_VC_CTRL);
107
108	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTCLR);
109
110	writel(DAVINCI_VC_INT_MASK, davinci_vc->base + DAVINCI_VC_INTEN);
111
112	w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
113
114	/* Determine xfer data type */
115	switch (params_format(params)) {
116	case SNDRV_PCM_FORMAT_U8:
117	dma_params->data_type = 0;
118
119	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
120	DAVINCI_VC_CTRL_RD_UNSIGNED \|
121	DAVINCI_VC_CTRL_WD_BITS_8 \|
122	DAVINCI_VC_CTRL_WD_UNSIGNED, 1);
123	break;
124	case SNDRV_PCM_FORMAT_S8:
125	dma_params->data_type = 1;
126
127	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
128	DAVINCI_VC_CTRL_WD_BITS_8, 1);
129
130	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_UNSIGNED \|
131	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
132	break;
133	case SNDRV_PCM_FORMAT_S16_LE:
134	dma_params->data_type = 2;
135
136	MOD_REG_BIT(w, DAVINCI_VC_CTRL_RD_BITS_8 \|
137	DAVINCI_VC_CTRL_RD_UNSIGNED \|
138	DAVINCI_VC_CTRL_WD_BITS_8 \|
139	DAVINCI_VC_CTRL_WD_UNSIGNED, 0);
140	break;
141	default:
142	printk(KERN_WARNING "davinci-vcif: unsupported PCM format");
143	return -EINVAL;
144	}
145
146	dma_params->acnt = dma_params->data_type;
147
148	writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
149
150	return 0;
151	}
152
153	static int davinci_vcif_trigger(struct snd_pcm_substream *substream, int cmd,
154	struct snd_soc_dai *dai)
155	{
156	int ret = 0;
157
158	switch (cmd) {
159	case SNDRV_PCM_TRIGGER_START:
160	case SNDRV_PCM_TRIGGER_RESUME:
161	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
162	davinci_vcif_start(substream);
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
175	#define DAVINCI_VCIF_RATES SNDRV_PCM_RATE_8000_48000
176
177	static struct snd_soc_dai_ops davinci_vcif_dai_ops = {
178	.trigger = davinci_vcif_trigger,
179	.hw_params = davinci_vcif_hw_params,
180	};
181
182	struct snd_soc_dai davinci_vcif_dai = {
183	.name = "davinci-vcif",
184	.playback = {
185	.channels_min = 1,
186	.channels_max = 2,
187	.rates = DAVINCI_VCIF_RATES,
188	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
189	.capture = {
190	.channels_min = 1,
191	.channels_max = 2,
192	.rates = DAVINCI_VCIF_RATES,
193	.formats = SNDRV_PCM_FMTBIT_S16_LE,},
194	.ops = &davinci_vcif_dai_ops,
195
196	};
197	EXPORT_SYMBOL_GPL(davinci_vcif_dai);
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);
206	if (!davinci_vc) {
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
225	davinci_vcif_dai.dev = &pdev->dev;
fd23b7de DM	226	davinci_vcif_dai.capture.dma_data = davinci_vcif_dev->dma_params;
fd23b7de DM	227	davinci_vcif_dai.playback.dma_data = davinci_vcif_dev->dma_params;
e155fcc2 MA	228	davinci_vcif_dai.private_data = davinci_vcif_dev;
	229
	230	ret = snd_soc_register_dai(&davinci_vcif_dai);
	231	if (ret != 0) {
	232	dev_err(&pdev->dev, "could not register dai\n");
	233	goto fail;
	234	}
	235
	236	return 0;
	237
	238	fail:
	239	kfree(davinci_vcif_dev);
	240
	241	return ret;
	242	}
	243
	244	static int davinci_vcif_remove(struct platform_device *pdev)
	245	{
	246	snd_soc_unregister_dai(&davinci_vcif_dai);
	247
	248	return 0;
	249	}
	250
	251	static struct platform_driver davinci_vcif_driver = {
	252	.probe = davinci_vcif_probe,
	253	.remove = davinci_vcif_remove,
	254	.driver = {
	255	.name = "davinci_vcif",
	256	.owner = THIS_MODULE,
	257	},
	258	};
	259
	260	static int __init davinci_vcif_init(void)
	261	{
	262	return platform_driver_probe(&davinci_vcif_driver, davinci_vcif_probe);
	263	}
	264	module_init(davinci_vcif_init);
	265
	266	static void __exit davinci_vcif_exit(void)
	267	{
	268	platform_driver_unregister(&davinci_vcif_driver);
	269	}
	270	module_exit(davinci_vcif_exit);
	271
	272	MODULE_AUTHOR("Miguel Aguilar");
	273	MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC Voice Codec Interface");
	274	MODULE_LICENSE("GPL");