sound/soc/davinci/davinci-vcif.c - arm/linux - Git at Google

 /*
  * 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;

 	/* 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;
 }

 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 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 = 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)
 {
 	struct davinci_vcif_dev *davinci_vcif_dev = dev_get_drvdata(&pdev->dev);

 	snd_soc_unregister_dai(&pdev->dev);
 	kfree(davinci_vcif_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");
	/*
	* 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;

	/* 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;
	}

	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 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 = 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)
	{
	struct davinci_vcif_dev *davinci_vcif_dev = dev_get_drvdata(&pdev->dev);

	snd_soc_unregister_dai(&pdev->dev);
	kfree(davinci_vcif_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");