[deliverable/linux.git] / sound / soc / codecs / tpa6130a2.c

/*
 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
 *
 * Copyright (C) Nokia Corporation
 *
 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * 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.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <sound/tpa6130a2-plat.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/tlv.h>

#include "tpa6130a2.h"

static struct i2c_client *tpa6130a2_client;

#define TPA6130A2_NUM_SUPPLIES 2
static const char *tpa6130a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
	"CPVSS",
	"Vdd",
};

static const char *tpa6140a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
	"HPVdd",
	"AVdd",
};

/* This struct is used to save the context */
struct tpa6130a2_data {
	struct mutex mutex;
	unsigned char regs[TPA6130A2_CACHEREGNUM];
	struct regulator_bulk_data supplies[TPA6130A2_NUM_SUPPLIES];
	int power_gpio;
	unsigned char power_state;
	enum tpa_model id;
};

static int tpa6130a2_i2c_read(int reg)
{
	struct tpa6130a2_data *data;
	int val;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	/* If powered off, return the cached value */
	if (data->power_state) {
		val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
		if (val < 0)
			dev_err(&tpa6130a2_client->dev, "Read failed\n");
		else
			data->regs[reg] = val;
	} else {
		val = data->regs[reg];
	}

	return val;
}

static int tpa6130a2_i2c_write(int reg, u8 value)
{
	struct tpa6130a2_data *data;
	int val = 0;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	if (data->power_state) {
		val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
		if (val < 0)
			dev_err(&tpa6130a2_client->dev, "Write failed\n");
	}

	/* Either powered on or off, we save the context */
	data->regs[reg] = value;

	return val;
}

static u8 tpa6130a2_read(int reg)
{
	struct tpa6130a2_data *data;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	return data->regs[reg];
}

static void tpa6130a2_initialize(void)
{
	struct tpa6130a2_data *data;
	int i;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	for (i = 1; i < TPA6130A2_REG_VERSION; i++)
		tpa6130a2_i2c_write(i, data->regs[i]);
}

static int tpa6130a2_power(int power)
{
	struct	tpa6130a2_data *data;
	u8	val;
	int	ret;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	mutex_lock(&data->mutex);
	if (power) {
		/* Power on */
		if (data->power_gpio >= 0)
			gpio_set_value(data->power_gpio, 1);

		ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies),
					    data->supplies);
		if (ret != 0) {
			dev_err(&tpa6130a2_client->dev,
				"Failed to enable supplies: %d\n", ret);
			goto exit;
		}

		data->power_state = 1;
		tpa6130a2_initialize();

		/* Clear SWS */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val &= ~TPA6130A2_SWS;
		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	} else {
		/* set SWS */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val |= TPA6130A2_SWS;
		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);

		/* Power off */
		if (data->power_gpio >= 0)
			gpio_set_value(data->power_gpio, 0);

		ret = regulator_bulk_disable(ARRAY_SIZE(data->supplies),
					     data->supplies);
		if (ret != 0) {
			dev_err(&tpa6130a2_client->dev,
				"Failed to disable supplies: %d\n", ret);
			goto exit;
		}

		data->power_state = 0;
	}

exit:
	mutex_unlock(&data->mutex);
	return ret;
}

static int tpa6130a2_get_reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct tpa6130a2_data *data;
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int mask = mc->max;
	unsigned int invert = mc->invert;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	mutex_lock(&data->mutex);

	ucontrol->value.integer.value[0] =
		(tpa6130a2_read(reg) >> shift) & mask;

	if (invert)
		ucontrol->value.integer.value[0] =
			mask - ucontrol->value.integer.value[0];

	mutex_unlock(&data->mutex);
	return 0;
}

static int tpa6130a2_set_reg(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct tpa6130a2_data *data;
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	unsigned int mask = mc->max;
	unsigned int invert = mc->invert;
	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	unsigned int val_reg;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	if (invert)
		val = mask - val;

	mutex_lock(&data->mutex);

	val_reg = tpa6130a2_read(reg);
	if (((val_reg >> shift) & mask) == val) {
		mutex_unlock(&data->mutex);
		return 0;
	}

	val_reg &= ~(mask << shift);
	val_reg |= val << shift;
	tpa6130a2_i2c_write(reg, val_reg);

	mutex_unlock(&data->mutex);

	return 1;
}

/*
 * TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
 * down in gain.
 */
static const unsigned int tpa6130_tlv[] = {
	TLV_DB_RANGE_HEAD(10),
	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
};

static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
		       TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
		       tpa6130a2_get_reg, tpa6130a2_set_reg,
		       tpa6130_tlv),
};

static const unsigned int tpa6140_tlv[] = {
	TLV_DB_RANGE_HEAD(3),
	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
};

static const struct snd_kcontrol_new tpa6140a2_controls[] = {
	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
		       TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
		       tpa6130a2_get_reg, tpa6130a2_set_reg,
		       tpa6140_tlv),
};

/*
 * Enable or disable channel (left or right)
 * The bit number for mute and amplifier are the same per channel:
 * bit 6: Right channel
 * bit 7: Left channel
 * in both registers.
 */
static void tpa6130a2_channel_enable(u8 channel, int enable)
{
	u8	val;

	if (enable) {
		/* Enable channel */
		/* Enable amplifier */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val |= channel;
		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);

		/* Unmute channel */
		val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
		val &= ~channel;
		tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	} else {
		/* Disable channel */
		/* Mute channel */
		val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
		val |= channel;
		tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);

		/* Disable amplifier */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val &= ~channel;
		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	}
}

static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *kcontrol, int event)
{
	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
		tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
		break;
	case SND_SOC_DAPM_POST_PMD:
		tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
		break;
	}
	return 0;
}

static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *kcontrol, int event)
{
	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
		tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
		break;
	case SND_SOC_DAPM_POST_PMD:
		tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
		break;
	}
	return 0;
}

static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
		struct snd_kcontrol *kcontrol, int event)
{
	int ret = 0;

	switch (event) {
	case SND_SOC_DAPM_POST_PMU:
		ret = tpa6130a2_power(1);
		break;
	case SND_SOC_DAPM_POST_PMD:
		ret = tpa6130a2_power(0);
		break;
	}
	return ret;
}

static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
			0, 0, NULL, 0, tpa6130a2_left_event,
			SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
			0, 0, NULL, 0, tpa6130a2_right_event,
			SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
			0, 0, tpa6130a2_supply_event,
			SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
	/* Outputs */
	SND_SOC_DAPM_HP("TPA6130A2 Headphone Left", NULL),
	SND_SOC_DAPM_HP("TPA6130A2 Headphone Right", NULL),
};

static const struct snd_soc_dapm_route audio_map[] = {
	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},

	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
};

int tpa6130a2_add_controls(struct snd_soc_codec *codec)
{
	struct	tpa6130a2_data *data;

	BUG_ON(tpa6130a2_client == NULL);
	data = i2c_get_clientdata(tpa6130a2_client);

	snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets,
				ARRAY_SIZE(tpa6130a2_dapm_widgets));

	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));

	if (data->id == TPA6140A2)
		return snd_soc_add_controls(codec, tpa6140a2_controls,
						ARRAY_SIZE(tpa6140a2_controls));
	else
		return snd_soc_add_controls(codec, tpa6130a2_controls,
						ARRAY_SIZE(tpa6130a2_controls));

}
EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);

static int __devinit tpa6130a2_probe(struct i2c_client *client,
				     const struct i2c_device_id *id)
{
	struct device *dev;
	struct tpa6130a2_data *data;
	struct tpa6130a2_platform_data *pdata;
	int i, ret;

	dev = &client->dev;

	if (client->dev.platform_data == NULL) {
		dev_err(dev, "Platform data not set\n");
		dump_stack();
		return -ENODEV;
	}

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (data == NULL) {
		dev_err(dev, "Can not allocate memory\n");
		return -ENOMEM;
	}

	tpa6130a2_client = client;

	i2c_set_clientdata(tpa6130a2_client, data);

	pdata = client->dev.platform_data;
	data->power_gpio = pdata->power_gpio;
	data->id = pdata->id;

	mutex_init(&data->mutex);

	/* Set default register values */
	data->regs[TPA6130A2_REG_CONTROL] =	TPA6130A2_SWS;
	data->regs[TPA6130A2_REG_VOL_MUTE] =	TPA6130A2_MUTE_R |
						TPA6130A2_MUTE_L;

	if (data->power_gpio >= 0) {
		ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
		if (ret < 0) {
			dev_err(dev, "Failed to request power GPIO (%d)\n",
				data->power_gpio);
			goto err_gpio;
		}
		gpio_direction_output(data->power_gpio, 0);
	}

	switch (data->id) {
	case TPA6130A2:
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
			data->supplies[i].supply = tpa6130a2_supply_names[i];
		break;
	case TPA6140A2:
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
			data->supplies[i].supply = tpa6140a2_supply_names[i];;
		break;
	default:
		dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
			 pdata->id);
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
			data->supplies[i].supply = tpa6130a2_supply_names[i];
	}

	ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
				 data->supplies);
	if (ret != 0) {
		dev_err(dev, "Failed to request supplies: %d\n", ret);
		goto err_regulator;
	}

	ret = tpa6130a2_power(1);
	if (ret != 0)
		goto err_power;


	/* Read version */
	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
				 TPA6130A2_VERSION_MASK;
	if ((ret != 1) && (ret != 2))
		dev_warn(dev, "UNTESTED version detected (%d)\n", ret);

	/* Disable the chip */
	ret = tpa6130a2_power(0);
	if (ret != 0)
		goto err_power;

	return 0;

err_power:
	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
err_regulator:
	if (data->power_gpio >= 0)
		gpio_free(data->power_gpio);
err_gpio:
	kfree(data);
	i2c_set_clientdata(tpa6130a2_client, NULL);
	tpa6130a2_client = NULL;

	return ret;
}

static int __devexit tpa6130a2_remove(struct i2c_client *client)
{
	struct tpa6130a2_data *data = i2c_get_clientdata(client);

	tpa6130a2_power(0);

	if (data->power_gpio >= 0)
		gpio_free(data->power_gpio);

	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);

	kfree(data);
	tpa6130a2_client = NULL;

	return 0;
}

static const struct i2c_device_id tpa6130a2_id[] = {
	{ "tpa6130a2", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);

static struct i2c_driver tpa6130a2_i2c_driver = {
	.driver = {
		.name = "tpa6130a2",
		.owner = THIS_MODULE,
	},
	.probe = tpa6130a2_probe,
	.remove = __devexit_p(tpa6130a2_remove),
	.id_table = tpa6130a2_id,
};

static int __init tpa6130a2_init(void)
{
	return i2c_add_driver(&tpa6130a2_i2c_driver);
}

static void __exit tpa6130a2_exit(void)
{
	i2c_del_driver(&tpa6130a2_i2c_driver);
}

MODULE_AUTHOR("Peter Ujfalusi");
MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
MODULE_LICENSE("GPL");

module_init(tpa6130a2_init);
module_exit(tpa6130a2_exit);
Commit	Line	Data
493b67ef PU	1	/*
	2	* ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
	3	*
	4	* Copyright (C) Nokia Corporation
	5	*
	6	* Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License
	10	* version 2 as published by the Free Software Foundation.
	11	*
	12	* This program is distributed in the hope that it will be useful, but
	13	* WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	20	* 02110-1301 USA
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/errno.h>
	25	#include <linux/device.h>
	26	#include <linux/i2c.h>
	27	#include <linux/gpio.h>
7c4e6492	28	#include <linux/regulator/consumer.h>
493b67ef PU	29	#include <sound/tpa6130a2-plat.h>
	30	#include <sound/soc.h>
	31	#include <sound/soc-dapm.h>
	32	#include <sound/tlv.h>
	33
	34	#include "tpa6130a2.h"
	35
ebab1b1d	36	static struct i2c_client *tpa6130a2_client;
493b67ef	37
7c4e6492 IK	38	#define TPA6130A2_NUM_SUPPLIES 2
	39	static const char *tpa6130a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
	40	"CPVSS",
	41	"Vdd",
	42	};
	43
2138301e IK	44	static const char *tpa6140a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
	45	"HPVdd",
	46	"AVdd",
	47	};
	48
493b67ef PU	49	/* This struct is used to save the context */
	50	struct tpa6130a2_data {
	51	struct mutex mutex;
	52	unsigned char regs[TPA6130A2_CACHEREGNUM];
7c4e6492	53	struct regulator_bulk_data supplies[TPA6130A2_NUM_SUPPLIES];
493b67ef PU	54	int power_gpio;
493b67ef PU	55	unsigned char power_state;
e5e5b31e	56	enum tpa_model id;
493b67ef PU	57	};
	58
	59	static int tpa6130a2_i2c_read(int reg)
	60	{
	61	struct tpa6130a2_data *data;
	62	int val;
	63
	64	BUG_ON(tpa6130a2_client == NULL);
	65	data = i2c_get_clientdata(tpa6130a2_client);
	66
	67	/* If powered off, return the cached value */
	68	if (data->power_state) {
	69	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	70	if (val < 0)
	71	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	72	else
	73	data->regs[reg] = val;
	74	} else {
	75	val = data->regs[reg];
	76	}
	77
	78	return val;
	79	}
	80
	81	static int tpa6130a2_i2c_write(int reg, u8 value)
	82	{
	83	struct tpa6130a2_data *data;
	84	int val = 0;
	85
	86	BUG_ON(tpa6130a2_client == NULL);
	87	data = i2c_get_clientdata(tpa6130a2_client);
	88
	89	if (data->power_state) {
	90	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
	91	if (val < 0)
	92	dev_err(&tpa6130a2_client->dev, "Write failed\n");
	93	}
	94
	95	/* Either powered on or off, we save the context */
	96	data->regs[reg] = value;
	97
	98	return val;
	99	}
	100
	101	static u8 tpa6130a2_read(int reg)
	102	{
	103	struct tpa6130a2_data *data;
	104
	105	BUG_ON(tpa6130a2_client == NULL);
	106	data = i2c_get_clientdata(tpa6130a2_client);
	107
	108	return data->regs[reg];
	109	}
	110
	111	static void tpa6130a2_initialize(void)
	112	{
	113	struct tpa6130a2_data *data;
	114	int i;
	115
	116	BUG_ON(tpa6130a2_client == NULL);
	117	data = i2c_get_clientdata(tpa6130a2_client);
	118
	119	for (i = 1; i < TPA6130A2_REG_VERSION; i++)
	120	tpa6130a2_i2c_write(i, data->regs[i]);
121	}
122
7c4e6492	123	static int tpa6130a2_power(int power)
493b67ef PU	124	{
	125	struct tpa6130a2_data *data;
	126	u8 val;
7c4e6492	127	int ret;
493b67ef PU	128
	129	BUG_ON(tpa6130a2_client == NULL);
	130	data = i2c_get_clientdata(tpa6130a2_client);
	131
	132	mutex_lock(&data->mutex);
	133	if (power) {
	134	/* Power on */
7c4e6492	135	if (data->power_gpio >= 0)
493b67ef	136	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	137
	138	ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies),
	139	data->supplies);
	140	if (ret != 0) {
	141	dev_err(&tpa6130a2_client->dev,
	142	"Failed to enable supplies: %d\n", ret);
	143	goto exit;
493b67ef	144	}
7c4e6492 IK	145
	146	data->power_state = 1;
	147	tpa6130a2_initialize();
	148
493b67ef PU	149	/* Clear SWS */
	150	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	151	val &= ~TPA6130A2_SWS;
	152	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	153	} else {
	154	/* set SWS */
	155	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	156	val \|= TPA6130A2_SWS;
	157	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	158
493b67ef	159	/* Power off */
7c4e6492	160	if (data->power_gpio >= 0)
493b67ef	161	gpio_set_value(data->power_gpio, 0);
7c4e6492 IK	162
	163	ret = regulator_bulk_disable(ARRAY_SIZE(data->supplies),
	164	data->supplies);
	165	if (ret != 0) {
	166	dev_err(&tpa6130a2_client->dev,
	167	"Failed to disable supplies: %d\n", ret);
	168	goto exit;
493b67ef	169	}
7c4e6492 IK	170
7c4e6492 IK	171	data->power_state = 0;
493b67ef	172	}
7c4e6492 IK	173
7c4e6492 IK	174	exit:
493b67ef	175	mutex_unlock(&data->mutex);
7c4e6492	176	return ret;
493b67ef PU	177	}
	178
	179	static int tpa6130a2_get_reg(struct snd_kcontrol *kcontrol,
	180	struct snd_ctl_elem_value *ucontrol)
	181	{
	182	struct soc_mixer_control *mc =
	183	(struct soc_mixer_control *)kcontrol->private_value;
	184	struct tpa6130a2_data *data;
	185	unsigned int reg = mc->reg;
	186	unsigned int shift = mc->shift;
	187	unsigned int mask = mc->max;
	188	unsigned int invert = mc->invert;
	189
	190	BUG_ON(tpa6130a2_client == NULL);
	191	data = i2c_get_clientdata(tpa6130a2_client);
	192
	193	mutex_lock(&data->mutex);
	194
	195	ucontrol->value.integer.value[0] =
	196	(tpa6130a2_read(reg) >> shift) & mask;
	197
	198	if (invert)
	199	ucontrol->value.integer.value[0] =
	200	mask - ucontrol->value.integer.value[0];
	201
	202	mutex_unlock(&data->mutex);
	203	return 0;
	204	}
	205
	206	static int tpa6130a2_set_reg(struct snd_kcontrol *kcontrol,
	207	struct snd_ctl_elem_value *ucontrol)
	208	{
	209	struct soc_mixer_control *mc =
	210	(struct soc_mixer_control *)kcontrol->private_value;
	211	struct tpa6130a2_data *data;
	212	unsigned int reg = mc->reg;
	213	unsigned int shift = mc->shift;
	214	unsigned int mask = mc->max;
	215	unsigned int invert = mc->invert;
	216	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	217	unsigned int val_reg;
	218
	219	BUG_ON(tpa6130a2_client == NULL);
	220	data = i2c_get_clientdata(tpa6130a2_client);
	221
	222	if (invert)
	223	val = mask - val;
	224
	225	mutex_lock(&data->mutex);
	226
	227	val_reg = tpa6130a2_read(reg);
	228	if (((val_reg >> shift) & mask) == val) {
	229	mutex_unlock(&data->mutex);
	230	return 0;
	231	}
	232
	233	val_reg &= ~(mask << shift);
	234	val_reg \|= val << shift;
	235	tpa6130a2_i2c_write(reg, val_reg);
	236
	237	mutex_unlock(&data->mutex);
	238
	239	return 1;
	240	}
241
242	/*
243	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
244	* down in gain.
245	*/
246	static const unsigned int tpa6130_tlv[] = {
247	TLV_DB_RANGE_HEAD(10),
248	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
249	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
250	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
251	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
252	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
253	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
254	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
255	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
256	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
257	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
258	};
259
260	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
826e962c PU	261	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	262	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
	263	tpa6130a2_get_reg, tpa6130a2_set_reg,
	264	tpa6130_tlv),
493b67ef PU	265	};
493b67ef PU	266
e5e5b31e PU	267	static const unsigned int tpa6140_tlv[] = {
	268	TLV_DB_RANGE_HEAD(3),
	269	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	270	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	271	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	272	};
	273
	274	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	275	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
	276	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
	277	tpa6130a2_get_reg, tpa6130a2_set_reg,
	278	tpa6140_tlv),
e5e5b31e PU	279	};
e5e5b31e PU	280
493b67ef PU	281	/*
	282	* Enable or disable channel (left or right)
	283	* The bit number for mute and amplifier are the same per channel:
	284	* bit 6: Right channel
	285	* bit 7: Left channel
	286	* in both registers.
	287	*/
	288	static void tpa6130a2_channel_enable(u8 channel, int enable)
	289	{
493b67ef PU	290	u8 val;
493b67ef PU	291
493b67ef PU	292	if (enable) {
	293	/* Enable channel */
	294	/* Enable amplifier */
	295	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	296	val \|= channel;
	297	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	298
	299	/* Unmute channel */
	300	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	301	val &= ~channel;
	302	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	303	} else {
	304	/* Disable channel */
	305	/* Mute channel */
	306	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	307	val \|= channel;
	308	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	309
	310	/* Disable amplifier */
	311	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	312	val &= ~channel;
	313	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	314	}
	315	}
	316
	317	static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
	318	struct snd_kcontrol *kcontrol, int event)
	319	{
	320	switch (event) {
	321	case SND_SOC_DAPM_POST_PMU:
	322	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
	323	break;
	324	case SND_SOC_DAPM_POST_PMD:
	325	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
	326	break;
	327	}
	328	return 0;
	329	}
	330
	331	static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
	332	struct snd_kcontrol *kcontrol, int event)
	333	{
	334	switch (event) {
	335	case SND_SOC_DAPM_POST_PMU:
	336	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
	337	break;
	338	case SND_SOC_DAPM_POST_PMD:
	339	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
	340	break;
	341	}
	342	return 0;
	343	}
	344
	345	static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
	346	struct snd_kcontrol *kcontrol, int event)
	347	{
7c4e6492 IK	348	int ret = 0;
7c4e6492 IK	349
493b67ef PU	350	switch (event) {
493b67ef PU	351	case SND_SOC_DAPM_POST_PMU:
7c4e6492	352	ret = tpa6130a2_power(1);
493b67ef PU	353	break;
493b67ef PU	354	case SND_SOC_DAPM_POST_PMD:
7c4e6492	355	ret = tpa6130a2_power(0);
493b67ef PU	356	break;
493b67ef PU	357	}
7c4e6492	358	return ret;
493b67ef PU	359	}
	360
	361	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	362	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
	363	0, 0, NULL, 0, tpa6130a2_left_event,
	364	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	365	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
	366	0, 0, NULL, 0, tpa6130a2_right_event,
	367	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	368	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
	369	0, 0, tpa6130a2_supply_event,
	370	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	371	/* Outputs */
	372	SND_SOC_DAPM_HP("TPA6130A2 Headphone Left", NULL),
	373	SND_SOC_DAPM_HP("TPA6130A2 Headphone Right", NULL),
	374	};
	375
	376	static const struct snd_soc_dapm_route audio_map[] = {
	377	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	378	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},
	379
	380	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	381	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
	382	};
	383
	384	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	385	{
e5e5b31e PU	386	struct tpa6130a2_data *data;
	387
	388	BUG_ON(tpa6130a2_client == NULL);
	389	data = i2c_get_clientdata(tpa6130a2_client);
	390
493b67ef PU	391	snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets,
	392	ARRAY_SIZE(tpa6130a2_dapm_widgets));
	393
	394	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
	395
e5e5b31e PU	396	if (data->id == TPA6140A2)
	397	return snd_soc_add_controls(codec, tpa6140a2_controls,
	398	ARRAY_SIZE(tpa6140a2_controls));
	399	else
	400	return snd_soc_add_controls(codec, tpa6130a2_controls,
	401	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	402
	403	}
	404	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	405
735fe4cf MB	406	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	407	const struct i2c_device_id *id)
493b67ef PU	408	{
	409	struct device *dev;
	410	struct tpa6130a2_data *data;
	411	struct tpa6130a2_platform_data *pdata;
7c4e6492	412	int i, ret;
493b67ef PU	413
	414	dev = &client->dev;
	415
	416	if (client->dev.platform_data == NULL) {
	417	dev_err(dev, "Platform data not set\n");
	418	dump_stack();
	419	return -ENODEV;
	420	}
	421
	422	data = kzalloc(sizeof(*data), GFP_KERNEL);
	423	if (data == NULL) {
	424	dev_err(dev, "Can not allocate memory\n");
	425	return -ENOMEM;
	426	}
	427
	428	tpa6130a2_client = client;
	429
	430	i2c_set_clientdata(tpa6130a2_client, data);
	431
ebab1b1d	432	pdata = client->dev.platform_data;
493b67ef	433	data->power_gpio = pdata->power_gpio;
e5e5b31e	434	data->id = pdata->id;
493b67ef PU	435
	436	mutex_init(&data->mutex);
	437
	438	/* Set default register values */
	439	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	440	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	441	TPA6130A2_MUTE_L;
	442
	443	if (data->power_gpio >= 0) {
	444	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	445	if (ret < 0) {
	446	dev_err(dev, "Failed to request power GPIO (%d)\n",
	447	data->power_gpio);
7c4e6492	448	goto err_gpio;
493b67ef PU	449	}
493b67ef PU	450	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	451	}
493b67ef PU	452
e5e5b31e	453	switch (data->id) {
2138301e IK	454	case TPA6130A2:
	455	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	456	data->supplies[i].supply = tpa6130a2_supply_names[i];
	457	break;
	458	case TPA6140A2:
	459	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	460	data->supplies[i].supply = tpa6140a2_supply_names[i];;
	461	break;
	462	default:
	463	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	464	pdata->id);
	465	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	466	data->supplies[i].supply = tpa6130a2_supply_names[i];
	467	}
7c4e6492 IK	468
	469	ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
	470	data->supplies);
	471	if (ret != 0) {
	472	dev_err(dev, "Failed to request supplies: %d\n", ret);
	473	goto err_regulator;
	474	}
	475
	476	ret = tpa6130a2_power(1);
	477	if (ret != 0)
	478	goto err_power;
	479
493b67ef PU	480
	481	/* Read version */
	482	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	483	TPA6130A2_VERSION_MASK;
	484	if ((ret != 1) && (ret != 2))
	485	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	486
	487	/* Disable the chip */
7c4e6492 IK	488	ret = tpa6130a2_power(0);
	489	if (ret != 0)
	490	goto err_power;
493b67ef PU	491
493b67ef PU	492	return 0;
7c4e6492 IK	493
	494	err_power:
	495	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
	496	err_regulator:
	497	if (data->power_gpio >= 0)
	498	gpio_free(data->power_gpio);
	499	err_gpio:
493b67ef PU	500	kfree(data);
493b67ef PU	501	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	502	tpa6130a2_client = NULL;
493b67ef PU	503
	504	return ret;
	505	}
	506
735fe4cf	507	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	508	{
	509	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	510
	511	tpa6130a2_power(0);
	512
	513	if (data->power_gpio >= 0)
	514	gpio_free(data->power_gpio);
7c4e6492 IK	515
	516	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
	517
493b67ef	518	kfree(data);
ebab1b1d	519	tpa6130a2_client = NULL;
493b67ef PU	520
	521	return 0;
	522	}
	523
	524	static const struct i2c_device_id tpa6130a2_id[] = {
	525	{ "tpa6130a2", 0 },
	526	{ }
	527	};
	528	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	529
	530	static struct i2c_driver tpa6130a2_i2c_driver = {
	531	.driver = {
	532	.name = "tpa6130a2",
	533	.owner = THIS_MODULE,
	534	},
	535	.probe = tpa6130a2_probe,
	536	.remove = __devexit_p(tpa6130a2_remove),
	537	.id_table = tpa6130a2_id,
	538	};
	539
	540	static int __init tpa6130a2_init(void)
	541	{
	542	return i2c_add_driver(&tpa6130a2_i2c_driver);
	543	}
	544
	545	static void __exit tpa6130a2_exit(void)
	546	{
	547	i2c_del_driver(&tpa6130a2_i2c_driver);
	548	}
	549
	550	MODULE_AUTHOR("Peter Ujfalusi");
	551	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	552	MODULE_LICENSE("GPL");
	553
	554	module_init(tpa6130a2_init);
	555	module_exit(tpa6130a2_exit);