sound/soc/atmel/sam9g20_wm8731.c - maze/linux - Git at Google

 /*
  * sam9g20_wm8731  --  SoC audio for AT91SAM9G20-based
  * 			ATMEL AT91SAM9G20ek board.
  *
  *  Copyright (C) 2005 SAN People
  *  Copyright (C) 2008 Atmel
  *
  * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
  *
  * Based on ati_b1_wm8731.c by:
  * Frank Mandarino <fmandarino@endrelia.com>
  * Copyright 2006 Endrelia Technologies Inc.
  * Based on corgi.c by:
  * Copyright 2005 Wolfson Microelectronics PLC.
  * Copyright 2005 Openedhand Ltd.
  *
  * 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/module.h>
 #include <linux/moduleparam.h>
 #include <linux/kernel.h>
 #include <linux/clk.h>
 #include <linux/timer.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>

 #include <linux/atmel-ssc.h>

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

 #include <asm/mach-types.h>
 #include <mach/hardware.h>
 #include <mach/gpio.h>

 #include "../codecs/wm8731.h"
 #include "atmel-pcm.h"
 #include "atmel_ssc_dai.h"

 #define MCLK_RATE 12000000

 /*
  * As shipped the board does not have inputs.  However, it is relatively
  * straightforward to modify the board to hook them up so support is left
  * in the driver.
  */
 #undef ENABLE_MIC_INPUT

 static struct clk *mclk;

 static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
 	struct snd_pcm_hw_params *params)
 {
 	struct snd_soc_pcm_runtime *rtd = substream->private_data;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	int ret;

 	/* set codec DAI configuration */
 	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
 		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 	if (ret < 0)
 		return ret;

 	/* set cpu DAI configuration */
 	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
 		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
 	if (ret < 0)
 		return ret;

 	return 0;
 }

 static struct snd_soc_ops at91sam9g20ek_ops = {
 	.hw_params = at91sam9g20ek_hw_params,
 };

 static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
 					enum snd_soc_bias_level level)
 {
 	static int mclk_on;
 	int ret = 0;

 	switch (level) {
 	case SND_SOC_BIAS_ON:
 	case SND_SOC_BIAS_PREPARE:
 		if (!mclk_on)
 			ret = clk_enable(mclk);
 		if (ret == 0)
 			mclk_on = 1;
 		break;

 	case SND_SOC_BIAS_OFF:
 	case SND_SOC_BIAS_STANDBY:
 		if (mclk_on)
 			clk_disable(mclk);
 		mclk_on = 0;
 		break;
 	}

 	return ret;
 }

 static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
 	SND_SOC_DAPM_MIC("Int Mic", NULL),
 	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 };

 static const struct snd_soc_dapm_route intercon[] = {

 	/* speaker connected to LHPOUT */
 	{"Ext Spk", NULL, "LHPOUT"},

 	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
 	{"MICIN", NULL, "Mic Bias"},
 	{"Mic Bias", NULL, "Int Mic"},
 };

 /*
  * Logic for a wm8731 as connected on a at91sam9g20ek board.
  */
 static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
 {
 	struct snd_soc_codec *codec = rtd->codec;
 	struct snd_soc_dai *codec_dai = rtd->codec_dai;
 	struct snd_soc_dapm_context *dapm = &codec->dapm;
 	int ret;

 	printk(KERN_DEBUG
 			"at91sam9g20ek_wm8731 "
 			": at91sam9g20ek_wm8731_init() called\n");

 	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
 		MCLK_RATE, SND_SOC_CLOCK_IN);
 	if (ret < 0) {
 		printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
 		return ret;
 	}

 	/* Add specific widgets */
 	snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
 				  ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
 	/* Set up specific audio path interconnects */
 	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));

 	/* not connected */
 	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
 	snd_soc_dapm_nc_pin(dapm, "LLINEIN");

 #ifdef ENABLE_MIC_INPUT
 	snd_soc_dapm_enable_pin(dapm, "Int Mic");
 #else
 	snd_soc_dapm_nc_pin(dapm, "Int Mic");
 #endif

 	/* always connected */
 	snd_soc_dapm_enable_pin(dapm, "Ext Spk");

 	snd_soc_dapm_sync(dapm);

 	return 0;
 }

 static struct snd_soc_dai_link at91sam9g20ek_dai = {
 	.name = "WM8731",
 	.stream_name = "WM8731 PCM",
 	.cpu_dai_name = "atmel-ssc-dai.0",
 	.codec_dai_name = "wm8731-hifi",
 	.init = at91sam9g20ek_wm8731_init,
 	.platform_name = "atmel-pcm-audio",
 	.codec_name = "wm8731.0-001b",
 	.ops = &at91sam9g20ek_ops,
 };

 static struct snd_soc_card snd_soc_at91sam9g20ek = {
 	.name = "AT91SAMG20-EK",
 	.dai_link = &at91sam9g20ek_dai,
 	.num_links = 1,
 	.set_bias_level = at91sam9g20ek_set_bias_level,
 };

 static struct platform_device *at91sam9g20ek_snd_device;

 static int __init at91sam9g20ek_init(void)
 {
 	struct clk *pllb;
 	int ret;

 	if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
 		return -ENODEV;

 	ret = atmel_ssc_set_audio(0);
 	if (ret != 0) {
 		pr_err("Failed to set SSC 0 for audio: %d\n", ret);
 		return ret;
 	}

 	/*
 	 * Codec MCLK is supplied by PCK0 - set it up.
 	 */
 	mclk = clk_get(NULL, "pck0");
 	if (IS_ERR(mclk)) {
 		printk(KERN_ERR "ASoC: Failed to get MCLK\n");
 		ret = PTR_ERR(mclk);
 		goto err;
 	}

 	pllb = clk_get(NULL, "pllb");
 	if (IS_ERR(pllb)) {
 		printk(KERN_ERR "ASoC: Failed to get PLLB\n");
 		ret = PTR_ERR(pllb);
 		goto err_mclk;
 	}
 	ret = clk_set_parent(mclk, pllb);
 	clk_put(pllb);
 	if (ret != 0) {
 		printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
 		goto err_mclk;
 	}

 	clk_set_rate(mclk, MCLK_RATE);

 	at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
 	if (!at91sam9g20ek_snd_device) {
 		printk(KERN_ERR "ASoC: Platform device allocation failed\n");
 		ret = -ENOMEM;
 		goto err_mclk;
 	}

 	platform_set_drvdata(at91sam9g20ek_snd_device,
 			&snd_soc_at91sam9g20ek);

 	ret = platform_device_add(at91sam9g20ek_snd_device);
 	if (ret) {
 		printk(KERN_ERR "ASoC: Platform device allocation failed\n");
 		goto err_device_add;
 	}

 	return ret;

 err_device_add:
 	platform_device_put(at91sam9g20ek_snd_device);
 err_mclk:
 	clk_put(mclk);
 	mclk = NULL;
 err:
 	return ret;
 }

 static void __exit at91sam9g20ek_exit(void)
 {
 	platform_device_unregister(at91sam9g20ek_snd_device);
 	at91sam9g20ek_snd_device = NULL;
 	clk_put(mclk);
 	mclk = NULL;
 }

 module_init(at91sam9g20ek_init);
 module_exit(at91sam9g20ek_exit);

 /* Module information */
 MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
 MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
 MODULE_LICENSE("GPL");
	/*
	* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
	* ATMEL AT91SAM9G20ek board.
	*
	* Copyright (C) 2005 SAN People
	* Copyright (C) 2008 Atmel
	*
	* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
	*
	* Based on ati_b1_wm8731.c by:
	* Frank Mandarino <fmandarino@endrelia.com>
	* Copyright 2006 Endrelia Technologies Inc.
	* Based on corgi.c by:
	* Copyright 2005 Wolfson Microelectronics PLC.
	* Copyright 2005 Openedhand Ltd.
	*
	* 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/module.h>
	#include <linux/moduleparam.h>
	#include <linux/kernel.h>
	#include <linux/clk.h>
	#include <linux/timer.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/i2c.h>

	#include <linux/atmel-ssc.h>

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

	#include <asm/mach-types.h>
	#include <mach/hardware.h>
	#include <mach/gpio.h>

	#include "../codecs/wm8731.h"
	#include "atmel-pcm.h"
	#include "atmel_ssc_dai.h"

	#define MCLK_RATE 12000000

	/*
	* As shipped the board does not have inputs. However, it is relatively
	* straightforward to modify the board to hook them up so support is left
	* in the driver.
	*/
	#undef ENABLE_MIC_INPUT

	static struct clk *mclk;

	static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
	struct snd_pcm_hw_params *params)
	{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	int ret;

	/* set codec DAI configuration */
	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S \|
	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
	return ret;

	/* set cpu DAI configuration */
	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBM_CFM);
	if (ret < 0)
	return ret;

	return 0;
	}

	static struct snd_soc_ops at91sam9g20ek_ops = {
	.hw_params = at91sam9g20ek_hw_params,
	};

	static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
	enum snd_soc_bias_level level)
	{
	static int mclk_on;
	int ret = 0;

	switch (level) {
	case SND_SOC_BIAS_ON:
	case SND_SOC_BIAS_PREPARE:
	if (!mclk_on)
	ret = clk_enable(mclk);
	if (ret == 0)
	mclk_on = 1;
	break;

	case SND_SOC_BIAS_OFF:
	case SND_SOC_BIAS_STANDBY:
	if (mclk_on)
	clk_disable(mclk);
	mclk_on = 0;
	break;
	}

	return ret;
	}

	static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
	SND_SOC_DAPM_MIC("Int Mic", NULL),
	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	};

	static const struct snd_soc_dapm_route intercon[] = {

	/* speaker connected to LHPOUT */
	{"Ext Spk", NULL, "LHPOUT"},

	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	{"MICIN", NULL, "Mic Bias"},
	{"Mic Bias", NULL, "Int Mic"},
	};

	/*
	* Logic for a wm8731 as connected on a at91sam9g20ek board.
	*/
	static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
	{
	struct snd_soc_codec *codec = rtd->codec;
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct snd_soc_dapm_context *dapm = &codec->dapm;
	int ret;

	printk(KERN_DEBUG
	"at91sam9g20ek_wm8731 "
	": at91sam9g20ek_wm8731_init() called\n");

	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
	MCLK_RATE, SND_SOC_CLOCK_IN);
	if (ret < 0) {
	printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
	return ret;
	}

	/* Add specific widgets */
	snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
	ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
	/* Set up specific audio path interconnects */
	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));

	/* not connected */
	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
	snd_soc_dapm_nc_pin(dapm, "LLINEIN");

	#ifdef ENABLE_MIC_INPUT
	snd_soc_dapm_enable_pin(dapm, "Int Mic");
	#else
	snd_soc_dapm_nc_pin(dapm, "Int Mic");
	#endif

	/* always connected */
	snd_soc_dapm_enable_pin(dapm, "Ext Spk");

	snd_soc_dapm_sync(dapm);

	return 0;
	}

	static struct snd_soc_dai_link at91sam9g20ek_dai = {
	.name = "WM8731",
	.stream_name = "WM8731 PCM",
	.cpu_dai_name = "atmel-ssc-dai.0",
	.codec_dai_name = "wm8731-hifi",
	.init = at91sam9g20ek_wm8731_init,
	.platform_name = "atmel-pcm-audio",
	.codec_name = "wm8731.0-001b",
	.ops = &at91sam9g20ek_ops,
	};

	static struct snd_soc_card snd_soc_at91sam9g20ek = {
	.name = "AT91SAMG20-EK",
	.dai_link = &at91sam9g20ek_dai,
	.num_links = 1,
	.set_bias_level = at91sam9g20ek_set_bias_level,
	};

	static struct platform_device *at91sam9g20ek_snd_device;

	static int __init at91sam9g20ek_init(void)
	{
	struct clk *pllb;
	int ret;

	if (!(machine_is_at91sam9g20ek() \|\| machine_is_at91sam9g20ek_2mmc()))
	return -ENODEV;

	ret = atmel_ssc_set_audio(0);
	if (ret != 0) {
	pr_err("Failed to set SSC 0 for audio: %d\n", ret);
	return ret;
	}

	/*
	* Codec MCLK is supplied by PCK0 - set it up.
	*/
	mclk = clk_get(NULL, "pck0");
	if (IS_ERR(mclk)) {
	printk(KERN_ERR "ASoC: Failed to get MCLK\n");
	ret = PTR_ERR(mclk);
	goto err;
	}

	pllb = clk_get(NULL, "pllb");
	if (IS_ERR(pllb)) {
	printk(KERN_ERR "ASoC: Failed to get PLLB\n");
	ret = PTR_ERR(pllb);
	goto err_mclk;
	}
	ret = clk_set_parent(mclk, pllb);
	clk_put(pllb);
	if (ret != 0) {
	printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
	goto err_mclk;
	}

	clk_set_rate(mclk, MCLK_RATE);

	at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
	if (!at91sam9g20ek_snd_device) {
	printk(KERN_ERR "ASoC: Platform device allocation failed\n");
	ret = -ENOMEM;
	goto err_mclk;
	}

	platform_set_drvdata(at91sam9g20ek_snd_device,
	&snd_soc_at91sam9g20ek);

	ret = platform_device_add(at91sam9g20ek_snd_device);
	if (ret) {
	printk(KERN_ERR "ASoC: Platform device allocation failed\n");
	goto err_device_add;
	}

	return ret;

	err_device_add:
	platform_device_put(at91sam9g20ek_snd_device);
	err_mclk:
	clk_put(mclk);
	mclk = NULL;
	err:
	return ret;
	}

	static void __exit at91sam9g20ek_exit(void)
	{
	platform_device_unregister(at91sam9g20ek_snd_device);
	at91sam9g20ek_snd_device = NULL;
	clk_put(mclk);
	mclk = NULL;
	}

	module_init(at91sam9g20ek_init);
	module_exit(at91sam9g20ek_exit);

	/* Module information */
	MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
	MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
	MODULE_LICENSE("GPL");