[mirror_ubuntu-zesty-kernel.git] / sound / soc / atmel / sam9x5_wm8731.c

/*
 * sam9x5_wm8731   --	SoC audio for AT91SAM9X5-based boards
 *			that are using WM8731 as codec.
 *
 *  Copyright (C) 2011 Atmel,
 *		  Nicolas Ferre <nicolas.ferre@atmel.com>
 *
 *  Copyright (C) 2013 Paratronic,
 *		  Richard Genoud <richard.genoud@gmail.com>
 *
 * Based on sam9g20_wm8731.c by:
 * Sedji Gaouaou <sedji.gaouaou@atmel.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.
 *
 */
#include <linux/of.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>
#include <linux/device.h>

#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>

#include "../codecs/wm8731.h"
#include "atmel_ssc_dai.h"


#define MCLK_RATE 12288000

#define DRV_NAME "sam9x5-snd-wm8731"

struct sam9x5_drvdata {
	int ssc_id;
};

/*
 * Logic for a wm8731 as connected on a at91sam9x5ek based board.
 */
static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
{
	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	struct device *dev = rtd->dev;
	int ret;

	dev_dbg(dev, "ASoC: %s called\n", __func__);

	/* set the codec system clock for DAC and ADC */
	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
				     MCLK_RATE, SND_SOC_CLOCK_IN);
	if (ret < 0) {
		dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret);
		return ret;
	}

	return 0;
}

/*
 * Audio paths on at91sam9x5ek board:
 *
 *  |A| ------------> |      | ---R----> Headphone Jack
 *  |T| <----\        |  WM  | ---L--/
 *  |9| ---> CLK <--> | 8731 | <--R----- Line In Jack
 *  |1| <------------ |      | <--L--/
 */
static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
	SND_SOC_DAPM_HP("Headphone Jack", NULL),
	SND_SOC_DAPM_LINE("Line In Jack", NULL),
};

static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct device_node *codec_np, *cpu_np;
	struct snd_soc_card *card;
	struct snd_soc_dai_link *dai;
	struct sam9x5_drvdata *priv;
	int ret;

	if (!np) {
		dev_err(&pdev->dev, "No device node supplied\n");
		return -EINVAL;
	}

	card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
	dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
	if (!dai || !card || !priv) {
		ret = -ENOMEM;
		goto out;
	}

	snd_soc_card_set_drvdata(card, priv);

	card->dev = &pdev->dev;
	card->owner = THIS_MODULE;
	card->dai_link = dai;
	card->num_links = 1;
	card->dapm_widgets = sam9x5_dapm_widgets;
	card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
	dai->name = "WM8731";
	dai->stream_name = "WM8731 PCM";
	dai->codec_dai_name = "wm8731-hifi";
	dai->init = sam9x5_wm8731_init;
	dai->dai_fmt = SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_NB_NF
		| SND_SOC_DAIFMT_CBM_CFM;

	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	if (ret) {
		dev_err(&pdev->dev, "atmel,model node missing\n");
		goto out;
	}

	ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
	if (ret) {
		dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
		goto out;
	}

	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	if (!codec_np) {
		dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
		ret = -EINVAL;
		goto out;
	}

	dai->codec_of_node = codec_np;

	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	if (!cpu_np) {
		dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
		ret = -EINVAL;
		goto out;
	}
	dai->cpu_of_node = cpu_np;
	dai->platform_of_node = cpu_np;

	priv->ssc_id = of_alias_get_id(cpu_np, "ssc");

	ret = atmel_ssc_set_audio(priv->ssc_id);
	if (ret != 0) {
		dev_err(&pdev->dev,
			"ASoC: Failed to set SSC %d for audio: %d\n",
			ret, priv->ssc_id);
		goto out;
	}

	of_node_put(codec_np);
	of_node_put(cpu_np);

	ret = snd_soc_register_card(card);
	if (ret) {
		dev_err(&pdev->dev,
			"ASoC: Platform device allocation failed\n");
		goto out_put_audio;
	}

	dev_dbg(&pdev->dev, "ASoC: %s ok\n", __func__);

	return ret;

out_put_audio:
	atmel_ssc_put_audio(priv->ssc_id);
out:
	return ret;
}

static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);
	struct sam9x5_drvdata *priv = card->drvdata;

	snd_soc_unregister_card(card);
	atmel_ssc_put_audio(priv->ssc_id);

	return 0;
}

static const struct of_device_id sam9x5_wm8731_of_match[] = {
	{ .compatible = "atmel,sam9x5-wm8731-audio", },
	{},
};
MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);

static struct platform_driver sam9x5_wm8731_driver = {
	.driver = {
		.name = DRV_NAME,
		.of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
	},
	.probe = sam9x5_wm8731_driver_probe,
	.remove = sam9x5_wm8731_driver_remove,
};
module_platform_driver(sam9x5_wm8731_driver);

/* Module information */
MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
Commit	Line	Data
fdbcb3cb NF	1	/*
	2	* sam9x5_wm8731 -- SoC audio for AT91SAM9X5-based boards
	3	* that are using WM8731 as codec.
	4	*
	5	* Copyright (C) 2011 Atmel,
	6	* Nicolas Ferre <nicolas.ferre@atmel.com>
	7	*
	8	* Copyright (C) 2013 Paratronic,
	9	* Richard Genoud <richard.genoud@gmail.com>
	10	*
	11	* Based on sam9g20_wm8731.c by:
	12	* Sedji Gaouaou <sedji.gaouaou@atmel.com>
	13	*
	14	* This program is free software; you can redistribute it and/or modify it
	15	* under the terms of the GNU General Public License as published by the
	16	* Free Software Foundation; either version 2 of the License, or (at your
	17	* option) any later version.
	18	*
	19	*/
	20	#include <linux/of.h>
	21	#include <linux/export.h>
	22	#include <linux/module.h>
	23	#include <linux/mod_devicetable.h>
	24	#include <linux/platform_device.h>
	25	#include <linux/device.h>
	26
	27	#include <sound/soc.h>
	28	#include <sound/soc-dai.h>
	29	#include <sound/soc-dapm.h>
	30
	31	#include "../codecs/wm8731.h"
	32	#include "atmel_ssc_dai.h"
	33
	34
	35	#define MCLK_RATE 12288000
	36
	37	#define DRV_NAME "sam9x5-snd-wm8731"
	38
	39	struct sam9x5_drvdata {
	40	int ssc_id;
	41	};
	42
	43	/*
	44	* Logic for a wm8731 as connected on a at91sam9x5ek based board.
	45	*/
	46	static int sam9x5_wm8731_init(struct snd_soc_pcm_runtime *rtd)
	47	{
	48	struct snd_soc_dai *codec_dai = rtd->codec_dai;
	49	struct device *dev = rtd->dev;
	50	int ret;
	51
	52	dev_dbg(dev, "ASoC: %s called\n", __func__);
	53
	54	/* set the codec system clock for DAC and ADC */
	55	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
	56	MCLK_RATE, SND_SOC_CLOCK_IN);
	57	if (ret < 0) {
	58	dev_err(dev, "ASoC: Failed to set WM8731 SYSCLK: %d\n", ret);
	59	return ret;
	60	}
	61
	62	return 0;
	63	}
	64
65	/*
66	* Audio paths on at91sam9x5ek board:
67	*
68	* \|A\| ------------> \| \| ---R----> Headphone Jack
69	* \|T\| <----\ \| WM \| ---L--/
70	* \|9\| ---> CLK <--> \| 8731 \| <--R----- Line In Jack
71	* \|1\| <------------ \| \| <--L--/
72	*/
73	static const struct snd_soc_dapm_widget sam9x5_dapm_widgets[] = {
74	SND_SOC_DAPM_HP("Headphone Jack", NULL),
75	SND_SOC_DAPM_LINE("Line In Jack", NULL),
76	};
77
78	static int sam9x5_wm8731_driver_probe(struct platform_device *pdev)
79	{
80	struct device_node *np = pdev->dev.of_node;
81	struct device_node codec_np, cpu_np;
82	struct snd_soc_card *card;
83	struct snd_soc_dai_link *dai;
84	struct sam9x5_drvdata *priv;
85	int ret;
86
87	if (!np) {
88	dev_err(&pdev->dev, "No device node supplied\n");
89	return -EINVAL;
90	}
91
92	card = devm_kzalloc(&pdev->dev, sizeof(*card), GFP_KERNEL);
93	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
94	dai = devm_kzalloc(&pdev->dev, sizeof(*dai), GFP_KERNEL);
95	if (!dai \|\| !card \|\| !priv) {
96	ret = -ENOMEM;
97	goto out;
98	}
99
46bec25d BS	100	snd_soc_card_set_drvdata(card, priv);
46bec25d BS	101
fdbcb3cb NF	102	card->dev = &pdev->dev;
	103	card->owner = THIS_MODULE;
	104	card->dai_link = dai;
	105	card->num_links = 1;
	106	card->dapm_widgets = sam9x5_dapm_widgets;
	107	card->num_dapm_widgets = ARRAY_SIZE(sam9x5_dapm_widgets);
	108	dai->name = "WM8731";
	109	dai->stream_name = "WM8731 PCM";
	110	dai->codec_dai_name = "wm8731-hifi";
	111	dai->init = sam9x5_wm8731_init;
bc567a93	112	dai->dai_fmt = SND_SOC_DAIFMT_DSP_A \| SND_SOC_DAIFMT_NB_NF
fdbcb3cb NF	113	\| SND_SOC_DAIFMT_CBM_CFM;
	114
	115	ret = snd_soc_of_parse_card_name(card, "atmel,model");
	116	if (ret) {
	117	dev_err(&pdev->dev, "atmel,model node missing\n");
	118	goto out;
	119	}
	120
	121	ret = snd_soc_of_parse_audio_routing(card, "atmel,audio-routing");
	122	if (ret) {
	123	dev_err(&pdev->dev, "atmel,audio-routing node missing\n");
	124	goto out;
	125	}
	126
	127	codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
	128	if (!codec_np) {
	129	dev_err(&pdev->dev, "atmel,audio-codec node missing\n");
	130	ret = -EINVAL;
	131	goto out;
	132	}
	133
	134	dai->codec_of_node = codec_np;
	135
	136	cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
	137	if (!cpu_np) {
	138	dev_err(&pdev->dev, "atmel,ssc-controller node missing\n");
	139	ret = -EINVAL;
	140	goto out;
	141	}
	142	dai->cpu_of_node = cpu_np;
	143	dai->platform_of_node = cpu_np;
	144
	145	priv->ssc_id = of_alias_get_id(cpu_np, "ssc");
	146
	147	ret = atmel_ssc_set_audio(priv->ssc_id);
	148	if (ret != 0) {
	149	dev_err(&pdev->dev,
	150	"ASoC: Failed to set SSC %d for audio: %d\n",
	151	ret, priv->ssc_id);
	152	goto out;
	153	}
	154
	155	of_node_put(codec_np);
	156	of_node_put(cpu_np);
	157
fdbcb3cb NF	158	ret = snd_soc_register_card(card);
	159	if (ret) {
	160	dev_err(&pdev->dev,
	161	"ASoC: Platform device allocation failed\n");
	162	goto out_put_audio;
	163	}
	164
	165	dev_dbg(&pdev->dev, "ASoC: %s ok\n", __func__);
	166
	167	return ret;
	168
	169	out_put_audio:
	170	atmel_ssc_put_audio(priv->ssc_id);
	171	out:
	172	return ret;
	173	}
	174
	175	static int sam9x5_wm8731_driver_remove(struct platform_device *pdev)
	176	{
	177	struct snd_soc_card *card = platform_get_drvdata(pdev);
	178	struct sam9x5_drvdata *priv = card->drvdata;
	179
	180	snd_soc_unregister_card(card);
	181	atmel_ssc_put_audio(priv->ssc_id);
	182
	183	return 0;
	184	}
	185
	186	static const struct of_device_id sam9x5_wm8731_of_match[] = {
	187	{ .compatible = "atmel,sam9x5-wm8731-audio", },
	188	{},
	189	};
	190	MODULE_DEVICE_TABLE(of, sam9x5_wm8731_of_match);
	191
	192	static struct platform_driver sam9x5_wm8731_driver = {
	193	.driver = {
	194	.name = DRV_NAME,
fdbcb3cb NF	195	.of_match_table = of_match_ptr(sam9x5_wm8731_of_match),
	196	},
	197	.probe = sam9x5_wm8731_driver_probe,
	198	.remove = sam9x5_wm8731_driver_remove,
	199	};
	200	module_platform_driver(sam9x5_wm8731_driver);
	201
	202	/* Module information */
	203	MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
	204	MODULE_AUTHOR("Richard Genoud <richard.genoud@gmail.com>");
	205	MODULE_DESCRIPTION("ALSA SoC machine driver for AT91SAM9x5 - WM8731");
	206	MODULE_LICENSE("GPL");
	207	MODULE_ALIAS("platform:" DRV_NAME);