[deliverable/linux.git] / sound / soc / codecs / wm1250-ev1.c

/*
 * Driver for the 1250-EV1 audio I/O module
 *
 * Copyright 2011 Wolfson Microelectronics plc
 *
 *  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/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/gpio.h>

#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/wm1250-ev1.h>

static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
	"WM1250 CLK_ENA",
	"WM1250 CLK_SEL0",
	"WM1250 CLK_SEL1",
	"WM1250 OSR",
	"WM1250 MASTER",
};

struct wm1250_priv {
	struct gpio gpios[WM1250_EV1_NUM_GPIOS];
};

static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec,
				     enum snd_soc_bias_level level)
{
	struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev);
	int ena;

	if (wm1250)
		ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
	else
		ena = -1;

	switch (level) {
	case SND_SOC_BIAS_ON:
		break;

	case SND_SOC_BIAS_PREPARE:
		break;

	case SND_SOC_BIAS_STANDBY:
		if (ena >= 0)
			gpio_set_value_cansleep(ena, 1);
		break;

	case SND_SOC_BIAS_OFF:
		if (ena >= 0)
			gpio_set_value_cansleep(ena, 0);
		break;
	}

	codec->dapm.bias_level = level;

	return 0;
}

static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),

SND_SOC_DAPM_INPUT("WM1250 Input"),
SND_SOC_DAPM_OUTPUT("WM1250 Output"),
};

static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
	{ "ADC", NULL, "WM1250 Input" },
	{ "WM1250 Output", NULL, "DAC" },
};

static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *params,
				struct snd_soc_dai *dai)
{
	struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec);

	switch (params_rate(params)) {
	case 8000:
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
			       1);
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
			       1);
		break;
	case 16000:
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
			       0);
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
			       1);
		break;
	case 32000:
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
			       1);
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
			       0);
		break;
	case 64000:
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
			       0);
		gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
			       0);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static const struct snd_soc_dai_ops wm1250_ev1_ops = {
	.hw_params = wm1250_ev1_hw_params,
};

#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |\
			  SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_64000)

static struct snd_soc_dai_driver wm1250_ev1_dai = {
	.name = "wm1250-ev1",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = WM1250_EV1_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = WM1250_EV1_RATES,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.ops = &wm1250_ev1_ops,
};

static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
	.dapm_widgets = wm1250_ev1_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
	.dapm_routes = wm1250_ev1_dapm_routes,
	.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),

	.set_bias_level = wm1250_ev1_set_bias_level,
	.idle_bias_off = true,
};

static int wm1250_ev1_pdata(struct i2c_client *i2c)
{
	struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
	struct wm1250_priv *wm1250;
	int i, ret;

	if (!pdata)
		return 0;

	wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
	if (!wm1250) {
		dev_err(&i2c->dev, "Unable to allocate private data\n");
		ret = -ENOMEM;
		goto err;
	}

	for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
		wm1250->gpios[i].gpio = pdata->gpios[i];
		wm1250->gpios[i].label = wm1250_gpio_names[i];
		wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
	}
	wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
	wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;

	ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
		goto err;
	}

	dev_set_drvdata(&i2c->dev, wm1250);

	return ret;

err:
	return ret;
}

static void wm1250_ev1_free(struct i2c_client *i2c)
{
	struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);

	if (wm1250)
		gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
}

static int wm1250_ev1_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *i2c_id)
{
	int id, board, rev, ret;

	dev_set_drvdata(&i2c->dev, NULL);

	board = i2c_smbus_read_byte_data(i2c, 0);
	if (board < 0) {
		dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
		return board;
	}

	id = (board & 0xfe) >> 2;
	rev = board & 0x3;

	if (id != 1) {
		dev_err(&i2c->dev, "Unknown board ID %d\n", id);
		return -ENODEV;
	}

	dev_info(&i2c->dev, "revision %d\n", rev + 1);

	ret = wm1250_ev1_pdata(i2c);
	if (ret != 0)
		return ret;

	ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
				     &wm1250_ev1_dai, 1);
	if (ret != 0) {
		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
		wm1250_ev1_free(i2c);
		return ret;
	}

	return 0;
}

static int wm1250_ev1_remove(struct i2c_client *i2c)
{
	snd_soc_unregister_codec(&i2c->dev);
	wm1250_ev1_free(i2c);

	return 0;
}

static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
	{ "wm1250-ev1", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);

static struct i2c_driver wm1250_ev1_i2c_driver = {
	.driver = {
		.name = "wm1250-ev1",
		.owner = THIS_MODULE,
	},
	.probe =    wm1250_ev1_probe,
	.remove =   wm1250_ev1_remove,
	.id_table = wm1250_ev1_i2c_id,
};

module_i2c_driver(wm1250_ev1_i2c_driver);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
4bb3f43c MB	1	/*
	2	* Driver for the 1250-EV1 audio I/O module
	3	*
	4	* Copyright 2011 Wolfson Microelectronics plc
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	*/
	12
	13	#include <linux/init.h>
	14	#include <linux/module.h>
213eb0fb	15	#include <linux/slab.h>
4bb3f43c	16	#include <linux/i2c.h>
213eb0fb	17	#include <linux/gpio.h>
4bb3f43c MB	18
	19	#include <sound/soc.h>
	20	#include <sound/soc-dapm.h>
213eb0fb MB	21	#include <sound/wm1250-ev1.h>
	22
	23	static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
	24	"WM1250 CLK_ENA",
	25	"WM1250 CLK_SEL0",
	26	"WM1250 CLK_SEL1",
	27	"WM1250 OSR",
	28	"WM1250 MASTER",
	29	};
	30
	31	struct wm1250_priv {
	32	struct gpio gpios[WM1250_EV1_NUM_GPIOS];
	33	};
	34
	35	static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec,
	36	enum snd_soc_bias_level level)
	37	{
	38	struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev);
	39	int ena;
	40
	41	if (wm1250)
	42	ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
	43	else
	44	ena = -1;
	45
	46	switch (level) {
	47	case SND_SOC_BIAS_ON:
	48	break;
	49
	50	case SND_SOC_BIAS_PREPARE:
	51	break;
	52
	53	case SND_SOC_BIAS_STANDBY:
	54	if (ena >= 0)
	55	gpio_set_value_cansleep(ena, 1);
	56	break;
	57
	58	case SND_SOC_BIAS_OFF:
	59	if (ena >= 0)
	60	gpio_set_value_cansleep(ena, 0);
	61	break;
	62	}
	63
	64	codec->dapm.bias_level = level;
	65
	66	return 0;
	67	}
4bb3f43c MB	68
	69	static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
	70	SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
	71	SND_SOC_DAPM_DAC("DAC", "wm1250-ev1 Playback", SND_SOC_NOPM, 0, 0),
	72
	73	SND_SOC_DAPM_INPUT("WM1250 Input"),
979f4869	74	SND_SOC_DAPM_OUTPUT("WM1250 Output"),
4bb3f43c MB	75	};
	76
	77	static const struct snd_soc_dapm_route wm1250_ev1_dapm_routes[] = {
	78	{ "ADC", NULL, "WM1250 Input" },
	79	{ "WM1250 Output", NULL, "DAC" },
	80	};
	81
fde39a6b MB	82	static int wm1250_ev1_hw_params(struct snd_pcm_substream *substream,
	83	struct snd_pcm_hw_params *params,
	84	struct snd_soc_dai *dai)
	85	{
	86	struct wm1250_priv *wm1250 = snd_soc_codec_get_drvdata(dai->codec);
	87
	88	switch (params_rate(params)) {
	89	case 8000:
	90	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
	91	1);
	92	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
	93	1);
	94	break;
	95	case 16000:
	96	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
	97	0);
	98	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
	99	1);
	100	break;
	101	case 32000:
	102	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
	103	1);
	104	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
	105	0);
	106	break;
	107	case 64000:
	108	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].gpio,
	109	0);
	110	gpio_set_value(wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].gpio,
	111	0);
	112	break;
	113	default:
	114	return -EINVAL;
	115	}
	116
	117	return 0;
	118	}
	119
	120	static const struct snd_soc_dai_ops wm1250_ev1_ops = {
	121	.hw_params = wm1250_ev1_hw_params,
	122	};
	123
bcbf4a69 MB	124	#define WM1250_EV1_RATES (SNDRV_PCM_RATE_8000 \| SNDRV_PCM_RATE_16000 \|\
	125	SNDRV_PCM_RATE_32000 \| SNDRV_PCM_RATE_64000)
	126
4bb3f43c MB	127	static struct snd_soc_dai_driver wm1250_ev1_dai = {
	128	.name = "wm1250-ev1",
	129	.playback = {
	130	.stream_name = "Playback",
	131	.channels_min = 1,
5f6ac59f	132	.channels_max = 2,
bcbf4a69	133	.rates = WM1250_EV1_RATES,
4bb3f43c MB	134	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	135	},
	136	.capture = {
	137	.stream_name = "Capture",
	138	.channels_min = 1,
5f6ac59f	139	.channels_max = 2,
bcbf4a69	140	.rates = WM1250_EV1_RATES,
4bb3f43c MB	141	.formats = SNDRV_PCM_FMTBIT_S16_LE,
4bb3f43c MB	142	},
fde39a6b	143	.ops = &wm1250_ev1_ops,
4bb3f43c MB	144	};
	145
	146	static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
	147	.dapm_widgets = wm1250_ev1_dapm_widgets,
	148	.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
	149	.dapm_routes = wm1250_ev1_dapm_routes,
	150	.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),
213eb0fb MB	151
213eb0fb MB	152	.set_bias_level = wm1250_ev1_set_bias_level,
a850260e	153	.idle_bias_off = true,
4bb3f43c MB	154	};
4bb3f43c MB	155
7a79e94e	156	static int wm1250_ev1_pdata(struct i2c_client *i2c)
213eb0fb MB	157	{
	158	struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
	159	struct wm1250_priv *wm1250;
	160	int i, ret;
	161
	162	if (!pdata)
	163	return 0;
	164
5fe803f5	165	wm1250 = devm_kzalloc(&i2c->dev, sizeof(*wm1250), GFP_KERNEL);
213eb0fb MB	166	if (!wm1250) {
	167	dev_err(&i2c->dev, "Unable to allocate private data\n");
	168	ret = -ENOMEM;
	169	goto err;
	170	}
	171
	172	for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
	173	wm1250->gpios[i].gpio = pdata->gpios[i];
	174	wm1250->gpios[i].label = wm1250_gpio_names[i];
	175	wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
	176	}
	177	wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
	178	wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;
	179
	180	ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
	181	if (ret != 0) {
	182	dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
5fe803f5	183	goto err;
213eb0fb MB	184	}
	185
	186	dev_set_drvdata(&i2c->dev, wm1250);
	187
	188	return ret;
	189
213eb0fb MB	190	err:
	191	return ret;
	192	}
	193
	194	static void wm1250_ev1_free(struct i2c_client *i2c)
	195	{
	196	struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);
	197
5fe803f5	198	if (wm1250)
213eb0fb	199	gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
213eb0fb MB	200	}
213eb0fb MB	201
7a79e94e BP	202	static int wm1250_ev1_probe(struct i2c_client *i2c,
7a79e94e BP	203	const struct i2c_device_id *i2c_id)
4bb3f43c	204	{
213eb0fb MB	205	int id, board, rev, ret;
	206
	207	dev_set_drvdata(&i2c->dev, NULL);
eaefb38f MB	208
	209	board = i2c_smbus_read_byte_data(i2c, 0);
	210	if (board < 0) {
c38071c0 MB	211	dev_err(&i2c->dev, "Failed to read ID: %d\n", board);
c38071c0 MB	212	return board;
eaefb38f MB	213	}
	214
	215	id = (board & 0xfe) >> 2;
	216	rev = board & 0x3;
	217
	218	if (id != 1) {
	219	dev_err(&i2c->dev, "Unknown board ID %d\n", id);
	220	return -ENODEV;
	221	}
	222
5c58b739	223	dev_info(&i2c->dev, "revision %d\n", rev + 1);
eaefb38f	224
213eb0fb MB	225	ret = wm1250_ev1_pdata(i2c);
	226	if (ret != 0)
	227	return ret;
	228
	229	ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
	230	&wm1250_ev1_dai, 1);
	231	if (ret != 0) {
	232	dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
	233	wm1250_ev1_free(i2c);
	234	return ret;
	235	}
	236
	237	return 0;
4bb3f43c MB	238	}
4bb3f43c MB	239
7a79e94e	240	static int wm1250_ev1_remove(struct i2c_client *i2c)
4bb3f43c MB	241	{
4bb3f43c MB	242	snd_soc_unregister_codec(&i2c->dev);
213eb0fb	243	wm1250_ev1_free(i2c);
4bb3f43c MB	244
	245	return 0;
	246	}
	247
	248	static const struct i2c_device_id wm1250_ev1_i2c_id[] = {
	249	{ "wm1250-ev1", 0 },
	250	{ }
	251	};
420dd718	252	MODULE_DEVICE_TABLE(i2c, wm1250_ev1_i2c_id);
4bb3f43c MB	253
	254	static struct i2c_driver wm1250_ev1_i2c_driver = {
	255	.driver = {
	256	.name = "wm1250-ev1",
	257	.owner = THIS_MODULE,
	258	},
	259	.probe = wm1250_ev1_probe,
7a79e94e	260	.remove = wm1250_ev1_remove,
4bb3f43c MB	261	.id_table = wm1250_ev1_i2c_id,
	262	};
	263
bbdd3915	264	module_i2c_driver(wm1250_ev1_i2c_driver);
4bb3f43c MB	265
	266	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	267	MODULE_DESCRIPTION("WM1250-EV1 audio I/O module driver");
	268	MODULE_LICENSE("GPL");