[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / soc / atmel / sam9g20_wm8731.c

/*
 * 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 <sound/soc-dapm.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;
	int ret;

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

	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
		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(codec, at91sam9g20ek_dapm_widgets,
				  ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
	/* Set up specific audio path interconnects */
	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));

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

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

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

	snd_soc_dapm_sync(codec);

	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-codec.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");
Commit	Line	Data
5b99e6cc SG	1	/*
	2	* sam9g20_wm8731 -- SoC audio for AT91SAM9G20-based
	3	* ATMEL AT91SAM9G20ek board.
	4	*
	5	* Copyright (C) 2005 SAN People
	6	* Copyright (C) 2008 Atmel
	7	*
	8	* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
	9	*
	10	* Based on ati_b1_wm8731.c by:
	11	* Frank Mandarino <fmandarino@endrelia.com>
	12	* Copyright 2006 Endrelia Technologies Inc.
	13	* Based on corgi.c by:
	14	* Copyright 2005 Wolfson Microelectronics PLC.
	15	* Copyright 2005 Openedhand Ltd.
	16	*
	17	* This program is free software; you can redistribute it and/or modify
	18	* it under the terms of the GNU General Public License as published by
	19	* the Free Software Foundation; either version 2 of the License, or
	20	* (at your option) any later version.
	21	*
	22	* This program is distributed in the hope that it will be useful,
	23	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	25	* GNU General Public License for more details.
	26	*
	27	* You should have received a copy of the GNU General Public License
	28	* along with this program; if not, write to the Free Software
	29	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	30	*/
	31
	32	#include <linux/module.h>
	33	#include <linux/moduleparam.h>
5b99e6cc SG	34	#include <linux/kernel.h>
	35	#include <linux/clk.h>
	36	#include <linux/timer.h>
	37	#include <linux/interrupt.h>
	38	#include <linux/platform_device.h>
5998102b	39	#include <linux/i2c.h>
5b99e6cc SG	40
	41	#include <linux/atmel-ssc.h>
	42
	43	#include <sound/core.h>
	44	#include <sound/pcm.h>
	45	#include <sound/pcm_params.h>
	46	#include <sound/soc.h>
	47	#include <sound/soc-dapm.h>
	48
40135ea0	49	#include <asm/mach-types.h>
5b99e6cc SG	50	#include <mach/hardware.h>
	51	#include <mach/gpio.h>
	52
	53	#include "../codecs/wm8731.h"
	54	#include "atmel-pcm.h"
	55	#include "atmel_ssc_dai.h"
	56
5de7f9b2 MB	57	#define MCLK_RATE 12000000
5de7f9b2 MB	58
22df8eb4 MB	59	/*
	60	* As shipped the board does not have inputs. However, it is relatively
	61	* straightforward to modify the board to hook them up so support is left
	62	* in the driver.
	63	*/
	64	#undef ENABLE_MIC_INPUT
	65
5de7f9b2	66	static struct clk *mclk;
5b99e6cc	67
5b99e6cc SG	68	static int at91sam9g20ek_hw_params(struct snd_pcm_substream *substream,
	69	struct snd_pcm_hw_params *params)
	70	{
	71	struct snd_soc_pcm_runtime *rtd = substream->private_data;
f0fba2ad LG	72	struct snd_soc_dai *codec_dai = rtd->codec_dai;
f0fba2ad LG	73	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
5b99e6cc SG	74	int ret;
5b99e6cc SG	75
5b99e6cc SG	76	/* set codec DAI configuration */
5b99e6cc SG	77	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S \|
2a01e5f3	78	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBM_CFM);
5b99e6cc SG	79	if (ret < 0)
	80	return ret;
	81
	82	/* set cpu DAI configuration */
	83	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S \|
2a01e5f3	84	SND_SOC_DAIFMT_NB_NF \| SND_SOC_DAIFMT_CBM_CFM);
5b99e6cc SG	85	if (ret < 0)
	86	return ret;
	87
	88	return 0;
	89	}
	90
	91	static struct snd_soc_ops at91sam9g20ek_ops = {
5b99e6cc	92	.hw_params = at91sam9g20ek_hw_params,
5b99e6cc SG	93	};
5b99e6cc SG	94
5de7f9b2 MB	95	static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
	96	enum snd_soc_bias_level level)
	97	{
	98	static int mclk_on;
	99	int ret = 0;
	100
	101	switch (level) {
	102	case SND_SOC_BIAS_ON:
	103	case SND_SOC_BIAS_PREPARE:
	104	if (!mclk_on)
	105	ret = clk_enable(mclk);
	106	if (ret == 0)
	107	mclk_on = 1;
	108	break;
	109
	110	case SND_SOC_BIAS_OFF:
	111	case SND_SOC_BIAS_STANDBY:
	112	if (mclk_on)
	113	clk_disable(mclk);
	114	mclk_on = 0;
	115	break;
	116	}
	117
	118	return ret;
	119	}
5b99e6cc SG	120
	121	static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
	122	SND_SOC_DAPM_MIC("Int Mic", NULL),
	123	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	124	};
	125
	126	static const struct snd_soc_dapm_route intercon[] = {
	127
	128	/* speaker connected to LHPOUT */
	129	{"Ext Spk", NULL, "LHPOUT"},
	130
	131	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	132	{"MICIN", NULL, "Mic Bias"},
	133	{"Mic Bias", NULL, "Int Mic"},
	134	};
	135
	136	/*
	137	* Logic for a wm8731 as connected on a at91sam9g20ek board.
	138	*/
f0fba2ad	139	static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
5b99e6cc	140	{
f0fba2ad LG	141	struct snd_soc_codec *codec = rtd->codec;
f0fba2ad LG	142	struct snd_soc_dai *codec_dai = rtd->codec_dai;
96fd6d47 MB	143	int ret;
96fd6d47 MB	144
5b99e6cc SG	145	printk(KERN_DEBUG
	146	"at91sam9g20ek_wm8731 "
	147	": at91sam9g20ek_wm8731_init() called\n");
	148
e7712510	149	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
96fd6d47 MB	150	MCLK_RATE, SND_SOC_CLOCK_IN);
	151	if (ret < 0) {
	152	printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
	153	return ret;
	154	}
	155
5b99e6cc SG	156	/* Add specific widgets */
	157	snd_soc_dapm_new_controls(codec, at91sam9g20ek_dapm_widgets,
	158	ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
	159	/* Set up specific audio path interconnects */
	160	snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
	161
	162	/* not connected */
8c0bad7f MB	163	snd_soc_dapm_nc_pin(codec, "RLINEIN");
8c0bad7f MB	164	snd_soc_dapm_nc_pin(codec, "LLINEIN");
5b99e6cc	165
22df8eb4	166	#ifdef ENABLE_MIC_INPUT
5b99e6cc	167	snd_soc_dapm_enable_pin(codec, "Int Mic");
22df8eb4 MB	168	#else
	169	snd_soc_dapm_nc_pin(codec, "Int Mic");
	170	#endif
	171
	172	/* always connected */
5b99e6cc SG	173	snd_soc_dapm_enable_pin(codec, "Ext Spk");
	174
	175	snd_soc_dapm_sync(codec);
	176
	177	return 0;
	178	}
	179
	180	static struct snd_soc_dai_link at91sam9g20ek_dai = {
	181	.name = "WM8731",
	182	.stream_name = "WM8731 PCM",
f0fba2ad LG	183	.cpu_dai_name = "atmel-ssc-dai.0",
f0fba2ad LG	184	.codec_dai_name = "wm8731-hifi",
5b99e6cc	185	.init = at91sam9g20ek_wm8731_init,
dad965f0 MB	186	.platform_name = "atmel-pcm-audio",
dad965f0 MB	187	.codec_name = "wm8731-codec.0-001b",
5b99e6cc SG	188	.ops = &at91sam9g20ek_ops,
	189	};
	190
87506549	191	static struct snd_soc_card snd_soc_at91sam9g20ek = {
7ee75380	192	.name = "AT91SAMG20-EK",
5b99e6cc SG	193	.dai_link = &at91sam9g20ek_dai,
5b99e6cc SG	194	.num_links = 1,
5de7f9b2	195	.set_bias_level = at91sam9g20ek_set_bias_level,
5b99e6cc SG	196	};
5b99e6cc SG	197
5b99e6cc SG	198	static struct platform_device *at91sam9g20ek_snd_device;
	199
	200	static int __init at91sam9g20ek_init(void)
	201	{
5de7f9b2	202	struct clk *pllb;
5b99e6cc SG	203	int ret;
5b99e6cc SG	204
69d2c2ae	205	if (!(machine_is_at91sam9g20ek() \|\| machine_is_at91sam9g20ek_2mmc()))
40135ea0 MB	206	return -ENODEV;
40135ea0 MB	207
abfa4eae MB	208	ret = atmel_ssc_set_audio(0);
	209	if (ret != 0) {
	210	pr_err("Failed to set SSC 0 for audio: %d\n", ret);
	211	return ret;
	212	}
	213
5de7f9b2 MB	214	/*
	215	* Codec MCLK is supplied by PCK0 - set it up.
	216	*/
	217	mclk = clk_get(NULL, "pck0");
	218	if (IS_ERR(mclk)) {
	219	printk(KERN_ERR "ASoC: Failed to get MCLK\n");
	220	ret = PTR_ERR(mclk);
	221	goto err;
	222	}
	223
	224	pllb = clk_get(NULL, "pllb");
b3915d1f	225	if (IS_ERR(pllb)) {
5de7f9b2	226	printk(KERN_ERR "ASoC: Failed to get PLLB\n");
b3915d1f	227	ret = PTR_ERR(pllb);
5de7f9b2 MB	228	goto err_mclk;
	229	}
	230	ret = clk_set_parent(mclk, pllb);
	231	clk_put(pllb);
	232	if (ret != 0) {
	233	printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
	234	goto err_mclk;
	235	}
	236
	237	clk_set_rate(mclk, MCLK_RATE);
	238
5b99e6cc SG	239	at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
5b99e6cc SG	240	if (!at91sam9g20ek_snd_device) {
d6943541	241	printk(KERN_ERR "ASoC: Platform device allocation failed\n");
5b99e6cc	242	ret = -ENOMEM;
c7a734e5	243	goto err_mclk;
5b99e6cc SG	244	}
	245
	246	platform_set_drvdata(at91sam9g20ek_snd_device,
f0fba2ad	247	&snd_soc_at91sam9g20ek);
5b99e6cc SG	248
	249	ret = platform_device_add(at91sam9g20ek_snd_device);
	250	if (ret) {
d6943541	251	printk(KERN_ERR "ASoC: Platform device allocation failed\n");
c7a734e5	252	goto err_device_add;
5b99e6cc SG	253	}
	254
	255	return ret;
	256
c7a734e5 AL	257	err_device_add:
c7a734e5 AL	258	platform_device_put(at91sam9g20ek_snd_device);
5de7f9b2 MB	259	err_mclk:
	260	clk_put(mclk);
	261	mclk = NULL;
	262	err:
5b99e6cc SG	263	return ret;
	264	}
	265
	266	static void __exit at91sam9g20ek_exit(void)
	267	{
5b99e6cc SG	268	platform_device_unregister(at91sam9g20ek_snd_device);
5b99e6cc SG	269	at91sam9g20ek_snd_device = NULL;
5de7f9b2 MB	270	clk_put(mclk);
5de7f9b2 MB	271	mclk = NULL;
5b99e6cc SG	272	}
	273
	274	module_init(at91sam9g20ek_init);
	275	module_exit(at91sam9g20ek_exit);
	276
	277	/* Module information */
	278	MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
	279	MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
	280	MODULE_LICENSE("GPL");