[deliverable/linux.git] / sound / soc / codecs / max98357a.c

/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * 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.
 *
 * max98357a.c -- MAX98357A ALSA SoC Codec driver
 */

#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dai.h>
#include <sound/soc-dapm.h>

static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
		int cmd, struct snd_soc_dai *dai)
{
	struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);

	if (!sdmode)
		return 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
	case SNDRV_PCM_TRIGGER_RESUME:
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		gpiod_set_value(sdmode, 1);
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	case SNDRV_PCM_TRIGGER_SUSPEND:
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		gpiod_set_value(sdmode, 0);
		break;
	}

	return 0;
}

static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("Speaker"),
};

static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
	{"Speaker", NULL, "HiFi Playback"},
};

static int max98357a_codec_probe(struct snd_soc_codec *codec)
{
	struct gpio_desc *sdmode;

	sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
	if (IS_ERR(sdmode)) {
		dev_err(codec->dev, "%s() unable to get sdmode GPIO: %ld\n",
				__func__, PTR_ERR(sdmode));
		return PTR_ERR(sdmode);
	}
	snd_soc_codec_set_drvdata(codec, sdmode);

	return 0;
}

static struct snd_soc_codec_driver max98357a_codec_driver = {
	.probe			= max98357a_codec_probe,
	.dapm_widgets		= max98357a_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(max98357a_dapm_widgets),
	.dapm_routes		= max98357a_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(max98357a_dapm_routes),
};

static struct snd_soc_dai_ops max98357a_dai_ops = {
	.trigger	= max98357a_daiops_trigger,
};

static struct snd_soc_dai_driver max98357a_dai_driver = {
	.name = "HiFi",
	.playback = {
		.stream_name	= "HiFi Playback",
		.formats	= SNDRV_PCM_FMTBIT_S16 |
					SNDRV_PCM_FMTBIT_S24 |
					SNDRV_PCM_FMTBIT_S32,
		.rates		= SNDRV_PCM_RATE_8000 |
					SNDRV_PCM_RATE_16000 |
					SNDRV_PCM_RATE_48000 |
					SNDRV_PCM_RATE_96000,
		.rate_min	= 8000,
		.rate_max	= 96000,
		.channels_min	= 1,
		.channels_max	= 2,
	},
	.ops    = &max98357a_dai_ops,
};

static int max98357a_platform_probe(struct platform_device *pdev)
{
	int ret;

	ret = snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver,
			&max98357a_dai_driver, 1);
	if (ret)
		dev_err(&pdev->dev, "%s() error registering codec driver: %d\n",
				__func__, ret);

	return ret;
}

static int max98357a_platform_remove(struct platform_device *pdev)
{
	snd_soc_unregister_codec(&pdev->dev);

	return 0;
}

#ifdef CONFIG_OF
static const struct of_device_id max98357a_device_id[] = {
	{ .compatible = "maxim,max98357a" },
	{}
};
MODULE_DEVICE_TABLE(of, max98357a_device_id);
#endif

static struct platform_driver max98357a_platform_driver = {
	.driver = {
		.name = "max98357a",
		.of_match_table = of_match_ptr(max98357a_device_id),
	},
	.probe	= max98357a_platform_probe,
	.remove = max98357a_platform_remove,
};
module_platform_driver(max98357a_platform_driver);

MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
af5adf12 KW	1	/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
	2	*
	3	* This program is free software; you can redistribute it and/or modify
	4	* it under the terms of the GNU General Public License version 2 and
	5	* only version 2 as published by the Free Software Foundation.
	6	*
	7	* This program is distributed in the hope that it will be useful,
	8	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	9	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	10	* GNU General Public License for more details.
	11	*
	12	* max98357a.c -- MAX98357A ALSA SoC Codec driver
	13	*/
	14
08d0a55c KW	15	#include <linux/device.h>
08d0a55c KW	16	#include <linux/err.h>
af5adf12	17	#include <linux/gpio.h>
5c8be987	18	#include <linux/gpio/consumer.h>
08d0a55c KW	19	#include <linux/kernel.h>
	20	#include <linux/mod_devicetable.h>
	21	#include <linux/module.h>
	22	#include <linux/of.h>
	23	#include <linux/platform_device.h>
	24	#include <sound/pcm.h>
af5adf12	25	#include <sound/soc.h>
08d0a55c KW	26	#include <sound/soc-dai.h>
08d0a55c KW	27	#include <sound/soc-dapm.h>
af5adf12	28
af5adf12 KW	29	static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
	30	int cmd, struct snd_soc_dai *dai)
	31	{
	32	struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);
	33
5119222f AP	34	if (!sdmode)
	35	return 0;
	36
af5adf12 KW	37	switch (cmd) {
	38	case SNDRV_PCM_TRIGGER_START:
	39	case SNDRV_PCM_TRIGGER_RESUME:
	40	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
	41	gpiod_set_value(sdmode, 1);
	42	break;
	43	case SNDRV_PCM_TRIGGER_STOP:
	44	case SNDRV_PCM_TRIGGER_SUSPEND:
	45	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
	46	gpiod_set_value(sdmode, 0);
	47	break;
	48	}
	49
	50	return 0;
	51	}
	52
	53	static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
af5adf12 KW	54	SND_SOC_DAPM_OUTPUT("Speaker"),
	55	};
	56
	57	static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
508e6195	58	{"Speaker", NULL, "HiFi Playback"},
af5adf12 KW	59	};
	60
	61	static int max98357a_codec_probe(struct snd_soc_codec *codec)
	62	{
	63	struct gpio_desc *sdmode;
	64
5119222f	65	sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
af5adf12 KW	66	if (IS_ERR(sdmode)) {
	67	dev_err(codec->dev, "%s() unable to get sdmode GPIO: %ld\n",
	68	__func__, PTR_ERR(sdmode));
	69	return PTR_ERR(sdmode);
	70	}
af5adf12 KW	71	snd_soc_codec_set_drvdata(codec, sdmode);
	72
	73	return 0;
	74	}
	75
	76	static struct snd_soc_codec_driver max98357a_codec_driver = {
	77	.probe = max98357a_codec_probe,
	78	.dapm_widgets = max98357a_dapm_widgets,
	79	.num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets),
	80	.dapm_routes = max98357a_dapm_routes,
	81	.num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes),
	82	};
	83
	84	static struct snd_soc_dai_ops max98357a_dai_ops = {
	85	.trigger = max98357a_daiops_trigger,
	86	};
	87
	88	static struct snd_soc_dai_driver max98357a_dai_driver = {
92b2ad2c	89	.name = "HiFi",
af5adf12	90	.playback = {
92b2ad2c	91	.stream_name = "HiFi Playback",
af5adf12 KW	92	.formats = SNDRV_PCM_FMTBIT_S16 \|
	93	SNDRV_PCM_FMTBIT_S24 \|
	94	SNDRV_PCM_FMTBIT_S32,
	95	.rates = SNDRV_PCM_RATE_8000 \|
	96	SNDRV_PCM_RATE_16000 \|
	97	SNDRV_PCM_RATE_48000 \|
	98	SNDRV_PCM_RATE_96000,
	99	.rate_min = 8000,
	100	.rate_max = 96000,
	101	.channels_min = 1,
	102	.channels_max = 2,
	103	},
	104	.ops = &max98357a_dai_ops,
	105	};
	106
	107	static int max98357a_platform_probe(struct platform_device *pdev)
	108	{
	109	int ret;
	110
	111	ret = snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver,
	112	&max98357a_dai_driver, 1);
	113	if (ret)
	114	dev_err(&pdev->dev, "%s() error registering codec driver: %d\n",
	115	__func__, ret);
	116
	117	return ret;
	118	}
	119
	120	static int max98357a_platform_remove(struct platform_device *pdev)
	121	{
	122	snd_soc_unregister_codec(&pdev->dev);
	123
	124	return 0;
	125	}
	126
	127	#ifdef CONFIG_OF
	128	static const struct of_device_id max98357a_device_id[] = {
7ff5eabc	129	{ .compatible = "maxim,max98357a" },
af5adf12 KW	130	{}
af5adf12 KW	131	};
3efa130d	132	MODULE_DEVICE_TABLE(of, max98357a_device_id);
af5adf12 KW	133	#endif
	134
	135	static struct platform_driver max98357a_platform_driver = {
	136	.driver = {
7ff5eabc	137	.name = "max98357a",
af5adf12 KW	138	.of_match_table = of_match_ptr(max98357a_device_id),
	139	},
	140	.probe = max98357a_platform_probe,
	141	.remove = max98357a_platform_remove,
	142	};
	143	module_platform_driver(max98357a_platform_driver);
	144
	145	MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
	146	MODULE_LICENSE("GPL v2");