[mirror_ubuntu-zesty-kernel.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/of.h>

#include <linux/atmel-ssc.h>

#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.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_set_bias_level(struct snd_soc_card *card,
					struct snd_soc_dapm_context *dapm,
					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/RHPOUT */
	{"Ext Spk", NULL, "LHPOUT"},
	{"Ext Spk", NULL, "RHPOUT"},

	/* 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_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_MCLK,
		MCLK_RATE, SND_SOC_CLOCK_IN);
	if (ret < 0) {
		printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
		return ret;
	}

#ifndef ENABLE_MIC_INPUT
	snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
#endif

	return 0;
}

static struct snd_soc_dai_link at91sam9g20ek_dai = {
	.name = "WM8731",
	.stream_name = "WM8731 PCM",
	.cpu_dai_name = "at91rm9200_ssc.0",
	.codec_dai_name = "wm8731-hifi",
	.init = at91sam9g20ek_wm8731_init,
	.platform_name = "at91rm9200_ssc.0",
	.codec_name = "wm8731.0-001b",
	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
		   SND_SOC_DAIFMT_CBM_CFM,
};

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

	.dapm_widgets = at91sam9g20ek_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
	.dapm_routes = intercon,
	.num_dapm_routes = ARRAY_SIZE(intercon),
	.fully_routed = true,
};

static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct device_node *codec_np, *cpu_np;
	struct clk *pllb;
	struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
	int ret;

	if (!np) {
		return -ENODEV;
	}

	ret = atmel_ssc_set_audio(0);
	if (ret) {
		dev_err(&pdev->dev, "ssc channel is not valid\n");
		return -EINVAL;
	}

	/*
	 * 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);

	card->dev = &pdev->dev;

	/* Parse device node info */
	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	if (ret)
		goto err;

	ret = snd_soc_of_parse_audio_routing(card,
		"atmel,audio-routing");
	if (ret)
		goto err;

	/* Parse codec info */
	at91sam9g20ek_dai.codec_name = NULL;
	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	if (!codec_np) {
		dev_err(&pdev->dev, "codec info missing\n");
		return -EINVAL;
	}
	at91sam9g20ek_dai.codec_of_node = codec_np;

	/* Parse dai and platform info */
	at91sam9g20ek_dai.cpu_dai_name = NULL;
	at91sam9g20ek_dai.platform_name = NULL;
	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	if (!cpu_np) {
		dev_err(&pdev->dev, "dai and pcm info missing\n");
		return -EINVAL;
	}
	at91sam9g20ek_dai.cpu_of_node = cpu_np;
	at91sam9g20ek_dai.platform_of_node = cpu_np;

	of_node_put(codec_np);
	of_node_put(cpu_np);

	ret = snd_soc_register_card(card);
	if (ret) {
		printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
	}

	return ret;

err_mclk:
	clk_put(mclk);
	mclk = NULL;
err:
	atmel_ssc_put_audio(0);
	return ret;
}

static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	clk_disable(mclk);
	mclk = NULL;
	snd_soc_unregister_card(card);
	atmel_ssc_put_audio(0);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
	{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
	{ }
};
MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
#endif

static struct platform_driver at91sam9g20ek_audio_driver = {
	.driver = {
		.name	= "at91sam9g20ek-audio",
		.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
	},
	.probe	= at91sam9g20ek_audio_probe,
	.remove	= at91sam9g20ek_audio_remove,
};

module_platform_driver(at91sam9g20ek_audio_driver);

/* Module information */
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
MODULE_ALIAS("platform:at91sam9g20ek-audio");
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>
8aa99652	40	#include <linux/of.h>
5b99e6cc SG	41
	42	#include <linux/atmel-ssc.h>
	43
	44	#include <sound/core.h>
	45	#include <sound/pcm.h>
	46	#include <sound/pcm_params.h>
	47	#include <sound/soc.h>
5b99e6cc	48
5b99e6cc SG	49	#include "../codecs/wm8731.h"
	50	#include "atmel-pcm.h"
	51	#include "atmel_ssc_dai.h"
	52
5de7f9b2 MB	53	#define MCLK_RATE 12000000
5de7f9b2 MB	54
22df8eb4 MB	55	/*
	56	* As shipped the board does not have inputs. However, it is relatively
	57	* straightforward to modify the board to hook them up so support is left
	58	* in the driver.
	59	*/
	60	#undef ENABLE_MIC_INPUT
	61
5de7f9b2	62	static struct clk *mclk;
5b99e6cc	63
5de7f9b2	64	static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
d4c6005f	65	struct snd_soc_dapm_context *dapm,
5de7f9b2 MB	66	enum snd_soc_bias_level level)
	67	{
	68	static int mclk_on;
	69	int ret = 0;
	70
	71	switch (level) {
	72	case SND_SOC_BIAS_ON:
	73	case SND_SOC_BIAS_PREPARE:
	74	if (!mclk_on)
	75	ret = clk_enable(mclk);
	76	if (ret == 0)
	77	mclk_on = 1;
	78	break;
	79
	80	case SND_SOC_BIAS_OFF:
	81	case SND_SOC_BIAS_STANDBY:
	82	if (mclk_on)
	83	clk_disable(mclk);
	84	mclk_on = 0;
	85	break;
	86	}
	87
	88	return ret;
	89	}
5b99e6cc SG	90
	91	static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
	92	SND_SOC_DAPM_MIC("Int Mic", NULL),
	93	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	94	};
	95
	96	static const struct snd_soc_dapm_route intercon[] = {
	97
a1677e39	98	/* speaker connected to LHPOUT/RHPOUT */
5b99e6cc	99	{"Ext Spk", NULL, "LHPOUT"},
a1677e39	100	{"Ext Spk", NULL, "RHPOUT"},
5b99e6cc SG	101
	102	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	103	{"MICIN", NULL, "Mic Bias"},
	104	{"Mic Bias", NULL, "Int Mic"},
	105	};
	106
	107	/*
	108	* Logic for a wm8731 as connected on a at91sam9g20ek board.
	109	*/
f0fba2ad	110	static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
5b99e6cc	111	{
f0fba2ad	112	struct snd_soc_dai *codec_dai = rtd->codec_dai;
96fd6d47 MB	113	int ret;
96fd6d47 MB	114
5b99e6cc SG	115	printk(KERN_DEBUG
	116	"at91sam9g20ek_wm8731 "
	117	": at91sam9g20ek_wm8731_init() called\n");
	118
6bb74a72	119	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
96fd6d47 MB	120	MCLK_RATE, SND_SOC_CLOCK_IN);
	121	if (ret < 0) {
	122	printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
	123	return ret;
	124	}
	125
b0ffe9b1 LPC	126	#ifndef ENABLE_MIC_INPUT
b0ffe9b1 LPC	127	snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
22df8eb4 MB	128	#endif
22df8eb4 MB	129
5b99e6cc SG	130	return 0;
	131	}
	132
	133	static struct snd_soc_dai_link at91sam9g20ek_dai = {
	134	.name = "WM8731",
	135	.stream_name = "WM8731 PCM",
3310b57d	136	.cpu_dai_name = "at91rm9200_ssc.0",
f0fba2ad	137	.codec_dai_name = "wm8731-hifi",
5b99e6cc	138	.init = at91sam9g20ek_wm8731_init,
3310b57d	139	.platform_name = "at91rm9200_ssc.0",
99b59f3c	140	.codec_name = "wm8731.0-001b",
059d3dc6 LPC	141	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF \|
059d3dc6 LPC	142	SND_SOC_DAIFMT_CBM_CFM,
5b99e6cc SG	143	};
5b99e6cc SG	144
87506549	145	static struct snd_soc_card snd_soc_at91sam9g20ek = {
7ee75380	146	.name = "AT91SAMG20-EK",
338d68db	147	.owner = THIS_MODULE,
5b99e6cc SG	148	.dai_link = &at91sam9g20ek_dai,
5b99e6cc SG	149	.num_links = 1,
5de7f9b2	150	.set_bias_level = at91sam9g20ek_set_bias_level,
b0ffe9b1 LPC	151
	152	.dapm_widgets = at91sam9g20ek_dapm_widgets,
	153	.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
	154	.dapm_routes = intercon,
	155	.num_dapm_routes = ARRAY_SIZE(intercon),
a1677e39	156	.fully_routed = true,
5b99e6cc SG	157	};
5b99e6cc SG	158
71d14ea6	159	static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
5b99e6cc	160	{
531f67e4 BS	161	struct device_node *np = pdev->dev.of_node;
531f67e4 BS	162	struct device_node codec_np, cpu_np;
5de7f9b2	163	struct clk *pllb;
242b9bb8	164	struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
5b99e6cc SG	165	int ret;
5b99e6cc SG	166
531f67e4	167	if (!np) {
d7a6fe01	168	return -ENODEV;
531f67e4	169	}
40135ea0	170
3310b57d BS	171	ret = atmel_ssc_set_audio(0);
	172	if (ret) {
	173	dev_err(&pdev->dev, "ssc channel is not valid\n");
	174	return -EINVAL;
	175	}
	176
5de7f9b2 MB	177	/*
	178	* Codec MCLK is supplied by PCK0 - set it up.
	179	*/
	180	mclk = clk_get(NULL, "pck0");
	181	if (IS_ERR(mclk)) {
	182	printk(KERN_ERR "ASoC: Failed to get MCLK\n");
	183	ret = PTR_ERR(mclk);
	184	goto err;
	185	}
	186
	187	pllb = clk_get(NULL, "pllb");
b3915d1f	188	if (IS_ERR(pllb)) {
5de7f9b2	189	printk(KERN_ERR "ASoC: Failed to get PLLB\n");
b3915d1f	190	ret = PTR_ERR(pllb);
5de7f9b2 MB	191	goto err_mclk;
	192	}
	193	ret = clk_set_parent(mclk, pllb);
	194	clk_put(pllb);
	195	if (ret != 0) {
	196	printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
	197	goto err_mclk;
	198	}
	199
	200	clk_set_rate(mclk, MCLK_RATE);
	201
242b9bb8	202	card->dev = &pdev->dev;
531f67e4 BS	203
531f67e4 BS	204	/* Parse device node info */
d7a6fe01 AB	205	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	206	if (ret)
	207	goto err;
	208
	209	ret = snd_soc_of_parse_audio_routing(card,
	210	"atmel,audio-routing");
	211	if (ret)
	212	goto err;
	213
	214	/* Parse codec info */
	215	at91sam9g20ek_dai.codec_name = NULL;
	216	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	217	if (!codec_np) {
	218	dev_err(&pdev->dev, "codec info missing\n");
	219	return -EINVAL;
	220	}
	221	at91sam9g20ek_dai.codec_of_node = codec_np;
	222
	223	/* Parse dai and platform info */
	224	at91sam9g20ek_dai.cpu_dai_name = NULL;
	225	at91sam9g20ek_dai.platform_name = NULL;
	226	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	227	if (!cpu_np) {
	228	dev_err(&pdev->dev, "dai and pcm info missing\n");
	229	return -EINVAL;
531f67e4	230	}
d7a6fe01 AB	231	at91sam9g20ek_dai.cpu_of_node = cpu_np;
	232	at91sam9g20ek_dai.platform_of_node = cpu_np;
	233
	234	of_node_put(codec_np);
	235	of_node_put(cpu_np);
531f67e4	236
242b9bb8	237	ret = snd_soc_register_card(card);
5b99e6cc	238	if (ret) {
242b9bb8	239	printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
5b99e6cc SG	240	}
	241
	242	return ret;
	243
5de7f9b2 MB	244	err_mclk:
	245	clk_put(mclk);
	246	mclk = NULL;
	247	err:
3310b57d	248	atmel_ssc_put_audio(0);
5b99e6cc SG	249	return ret;
	250	}
	251
71d14ea6	252	static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
5b99e6cc	253	{
242b9bb8 BS	254	struct snd_soc_card *card = platform_get_drvdata(pdev);
242b9bb8 BS	255
151edfc7	256	clk_disable(mclk);
5de7f9b2	257	mclk = NULL;
151edfc7 BS	258	snd_soc_unregister_card(card);
151edfc7 BS	259	atmel_ssc_put_audio(0);
242b9bb8 BS	260
242b9bb8 BS	261	return 0;
5b99e6cc SG	262	}
5b99e6cc SG	263
531f67e4 BS	264	#ifdef CONFIG_OF
	265	static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
	266	{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
	267	{ }
	268	};
	269	MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
	270	#endif
	271
242b9bb8 BS	272	static struct platform_driver at91sam9g20ek_audio_driver = {
	273	.driver = {
	274	.name = "at91sam9g20ek-audio",
531f67e4	275	.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
242b9bb8 BS	276	},
242b9bb8 BS	277	.probe = at91sam9g20ek_audio_probe,
71d14ea6	278	.remove = at91sam9g20ek_audio_remove,
242b9bb8 BS	279	};
	280
	281	module_platform_driver(at91sam9g20ek_audio_driver);
5b99e6cc SG	282
	283	/* Module information */
	284	MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
	285	MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
242b9bb8	286	MODULE_ALIAS("platform:at91sam9g20ek-audio");
5b99e6cc	287	MODULE_LICENSE("GPL");