[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 <asm/mach-types.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 */
	{"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;
	}

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

#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),
};

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) {
		if (!(machine_is_at91sam9g20ek() ||
			machine_is_at91sam9g20ek_2mmc()))
			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 */
	if (np) {
		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
40135ea0	49	#include <asm/mach-types.h>
5b99e6cc SG	50
	51	#include "../codecs/wm8731.h"
	52	#include "atmel-pcm.h"
	53	#include "atmel_ssc_dai.h"
	54
5de7f9b2 MB	55	#define MCLK_RATE 12000000
5de7f9b2 MB	56
22df8eb4 MB	57	/*
	58	* As shipped the board does not have inputs. However, it is relatively
	59	* straightforward to modify the board to hook them up so support is left
	60	* in the driver.
	61	*/
	62	#undef ENABLE_MIC_INPUT
	63
5de7f9b2	64	static struct clk *mclk;
5b99e6cc	65
5de7f9b2	66	static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
d4c6005f	67	struct snd_soc_dapm_context *dapm,
5de7f9b2 MB	68	enum snd_soc_bias_level level)
	69	{
	70	static int mclk_on;
	71	int ret = 0;
	72
	73	switch (level) {
	74	case SND_SOC_BIAS_ON:
	75	case SND_SOC_BIAS_PREPARE:
	76	if (!mclk_on)
	77	ret = clk_enable(mclk);
	78	if (ret == 0)
	79	mclk_on = 1;
	80	break;
	81
	82	case SND_SOC_BIAS_OFF:
	83	case SND_SOC_BIAS_STANDBY:
	84	if (mclk_on)
	85	clk_disable(mclk);
	86	mclk_on = 0;
	87	break;
	88	}
	89
	90	return ret;
	91	}
5b99e6cc SG	92
	93	static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
	94	SND_SOC_DAPM_MIC("Int Mic", NULL),
	95	SND_SOC_DAPM_SPK("Ext Spk", NULL),
	96	};
	97
	98	static const struct snd_soc_dapm_route intercon[] = {
	99
	100	/* speaker connected to LHPOUT */
	101	{"Ext Spk", NULL, "LHPOUT"},
	102
	103	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
	104	{"MICIN", NULL, "Mic Bias"},
	105	{"Mic Bias", NULL, "Int Mic"},
	106	};
	107
	108	/*
	109	* Logic for a wm8731 as connected on a at91sam9g20ek board.
	110	*/
f0fba2ad	111	static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
5b99e6cc	112	{
f0fba2ad LG	113	struct snd_soc_codec *codec = rtd->codec;
f0fba2ad LG	114	struct snd_soc_dai *codec_dai = rtd->codec_dai;
ce6120cc	115	struct snd_soc_dapm_context *dapm = &codec->dapm;
96fd6d47 MB	116	int ret;
96fd6d47 MB	117
5b99e6cc SG	118	printk(KERN_DEBUG
	119	"at91sam9g20ek_wm8731 "
	120	": at91sam9g20ek_wm8731_init() called\n");
	121
6bb74a72	122	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
96fd6d47 MB	123	MCLK_RATE, SND_SOC_CLOCK_IN);
	124	if (ret < 0) {
	125	printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
	126	return ret;
	127	}
	128
5b99e6cc	129	/* not connected */
ce6120cc LG	130	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
ce6120cc LG	131	snd_soc_dapm_nc_pin(dapm, "LLINEIN");
5b99e6cc	132
b0ffe9b1 LPC	133	#ifndef ENABLE_MIC_INPUT
b0ffe9b1 LPC	134	snd_soc_dapm_nc_pin(&rtd->card->dapm, "Int Mic");
22df8eb4 MB	135	#endif
22df8eb4 MB	136
5b99e6cc SG	137	return 0;
	138	}
	139
	140	static struct snd_soc_dai_link at91sam9g20ek_dai = {
	141	.name = "WM8731",
	142	.stream_name = "WM8731 PCM",
3310b57d	143	.cpu_dai_name = "at91rm9200_ssc.0",
f0fba2ad	144	.codec_dai_name = "wm8731-hifi",
5b99e6cc	145	.init = at91sam9g20ek_wm8731_init,
3310b57d	146	.platform_name = "at91rm9200_ssc.0",
99b59f3c	147	.codec_name = "wm8731.0-001b",
059d3dc6 LPC	148	.dai_fmt = SND_SOC_DAIFMT_I2S \| SND_SOC_DAIFMT_NB_NF \|
059d3dc6 LPC	149	SND_SOC_DAIFMT_CBM_CFM,
5b99e6cc SG	150	};
5b99e6cc SG	151
87506549	152	static struct snd_soc_card snd_soc_at91sam9g20ek = {
7ee75380	153	.name = "AT91SAMG20-EK",
338d68db	154	.owner = THIS_MODULE,
5b99e6cc SG	155	.dai_link = &at91sam9g20ek_dai,
5b99e6cc SG	156	.num_links = 1,
5de7f9b2	157	.set_bias_level = at91sam9g20ek_set_bias_level,
b0ffe9b1 LPC	158
	159	.dapm_widgets = at91sam9g20ek_dapm_widgets,
	160	.num_dapm_widgets = ARRAY_SIZE(at91sam9g20ek_dapm_widgets),
	161	.dapm_routes = intercon,
	162	.num_dapm_routes = ARRAY_SIZE(intercon),
5b99e6cc SG	163	};
5b99e6cc SG	164
71d14ea6	165	static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
5b99e6cc	166	{
531f67e4 BS	167	struct device_node *np = pdev->dev.of_node;
531f67e4 BS	168	struct device_node codec_np, cpu_np;
5de7f9b2	169	struct clk *pllb;
242b9bb8	170	struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
5b99e6cc SG	171	int ret;
5b99e6cc SG	172
531f67e4 BS	173	if (!np) {
	174	if (!(machine_is_at91sam9g20ek() \|\|
	175	machine_is_at91sam9g20ek_2mmc()))
	176	return -ENODEV;
	177	}
40135ea0	178
3310b57d BS	179	ret = atmel_ssc_set_audio(0);
	180	if (ret) {
	181	dev_err(&pdev->dev, "ssc channel is not valid\n");
	182	return -EINVAL;
	183	}
	184
5de7f9b2 MB	185	/*
	186	* Codec MCLK is supplied by PCK0 - set it up.
	187	*/
	188	mclk = clk_get(NULL, "pck0");
	189	if (IS_ERR(mclk)) {
	190	printk(KERN_ERR "ASoC: Failed to get MCLK\n");
	191	ret = PTR_ERR(mclk);
	192	goto err;
	193	}
	194
	195	pllb = clk_get(NULL, "pllb");
b3915d1f	196	if (IS_ERR(pllb)) {
5de7f9b2	197	printk(KERN_ERR "ASoC: Failed to get PLLB\n");
b3915d1f	198	ret = PTR_ERR(pllb);
5de7f9b2 MB	199	goto err_mclk;
	200	}
	201	ret = clk_set_parent(mclk, pllb);
	202	clk_put(pllb);
	203	if (ret != 0) {
	204	printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
	205	goto err_mclk;
	206	}
	207
	208	clk_set_rate(mclk, MCLK_RATE);
	209
242b9bb8	210	card->dev = &pdev->dev;
531f67e4 BS	211
	212	/* Parse device node info */
	213	if (np) {
	214	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	215	if (ret)
	216	goto err;
	217
	218	ret = snd_soc_of_parse_audio_routing(card,
	219	"atmel,audio-routing");
	220	if (ret)
	221	goto err;
	222
	223	/* Parse codec info */
	224	at91sam9g20ek_dai.codec_name = NULL;
	225	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	226	if (!codec_np) {
	227	dev_err(&pdev->dev, "codec info missing\n");
	228	return -EINVAL;
	229	}
	230	at91sam9g20ek_dai.codec_of_node = codec_np;
	231
	232	/* Parse dai and platform info */
	233	at91sam9g20ek_dai.cpu_dai_name = NULL;
	234	at91sam9g20ek_dai.platform_name = NULL;
	235	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	236	if (!cpu_np) {
	237	dev_err(&pdev->dev, "dai and pcm info missing\n");
	238	return -EINVAL;
	239	}
	240	at91sam9g20ek_dai.cpu_of_node = cpu_np;
	241	at91sam9g20ek_dai.platform_of_node = cpu_np;
	242
	243	of_node_put(codec_np);
	244	of_node_put(cpu_np);
	245	}
	246
242b9bb8	247	ret = snd_soc_register_card(card);
5b99e6cc	248	if (ret) {
242b9bb8	249	printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
5b99e6cc SG	250	}
	251
	252	return ret;
	253
5de7f9b2 MB	254	err_mclk:
	255	clk_put(mclk);
	256	mclk = NULL;
	257	err:
3310b57d	258	atmel_ssc_put_audio(0);
5b99e6cc SG	259	return ret;
	260	}
	261
71d14ea6	262	static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
5b99e6cc	263	{
242b9bb8 BS	264	struct snd_soc_card *card = platform_get_drvdata(pdev);
242b9bb8 BS	265
151edfc7	266	clk_disable(mclk);
5de7f9b2	267	mclk = NULL;
151edfc7 BS	268	snd_soc_unregister_card(card);
151edfc7 BS	269	atmel_ssc_put_audio(0);
242b9bb8 BS	270
242b9bb8 BS	271	return 0;
5b99e6cc SG	272	}
5b99e6cc SG	273
531f67e4 BS	274	#ifdef CONFIG_OF
	275	static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
	276	{ .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
	277	{ }
	278	};
	279	MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
	280	#endif
	281
242b9bb8 BS	282	static struct platform_driver at91sam9g20ek_audio_driver = {
	283	.driver = {
	284	.name = "at91sam9g20ek-audio",
531f67e4	285	.of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
242b9bb8 BS	286	},
242b9bb8 BS	287	.probe = at91sam9g20ek_audio_probe,
71d14ea6	288	.remove = at91sam9g20ek_audio_remove,
242b9bb8 BS	289	};
	290
	291	module_platform_driver(at91sam9g20ek_audio_driver);
5b99e6cc SG	292
	293	/* Module information */
	294	MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
	295	MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
242b9bb8	296	MODULE_ALIAS("platform:at91sam9g20ek-audio");
5b99e6cc	297	MODULE_LICENSE("GPL");