[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 <linux/slab.h>
#include <sound/tpa6130a2-plat.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#include "tpa6130a2.h"

static struct i2c_client *tpa6130a2_client;

/* This struct is used to save the context */
struct tpa6130a2_data {
	struct mutex mutex;
	unsigned char regs[TPA6130A2_CACHEREGNUM];
	struct regulator *supply;
	int power_gpio;
	u8 power_state:1;
	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");
			return val;
		}
	}

	/* 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 int tpa6130a2_initialize(void)
{
	struct tpa6130a2_data *data;
	int i, ret = 0;

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

	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
		ret = tpa6130a2_i2c_write(i, data->regs[i]);
		if (ret < 0)
			break;
	}

	return ret;
}

static int tpa6130a2_power(u8 power)
{
	struct	tpa6130a2_data *data;
	u8	val;
	int	ret = 0;

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

	mutex_lock(&data->mutex);
	if (power == data->power_state)
		goto exit;

	if (power) {
		ret = regulator_enable(data->supply);
		if (ret != 0) {
			dev_err(&tpa6130a2_client->dev,
				"Failed to enable supply: %d\n", ret);
			goto exit;
		}
		/* Power on */
		if (data->power_gpio >= 0)
			gpio_set_value(data->power_gpio, 1);

		data->power_state = 1;
		ret = tpa6130a2_initialize();
		if (ret < 0) {
			dev_err(&tpa6130a2_client->dev,
				"Failed to initialize chip\n");
			if (data->power_gpio >= 0)
				gpio_set_value(data->power_gpio, 0);
			regulator_disable(data->supply);
			data->power_state = 0;
			goto exit;
		}
	} 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_disable(data->supply);
		if (ret != 0) {
			dev_err(&tpa6130a2_client->dev,
				"Failed to disable supply: %d\n", ret);
			goto exit;
		}

		data->power_state = 0;
	}

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

static int tpa6130a2_get_volsw(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;
	int max = mc->max;
	unsigned int mask = (1 << fls(max)) - 1;
	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] =
			max - ucontrol->value.integer.value[0];

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

static int tpa6130a2_put_volsw(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;
	int max = mc->max;
	unsigned int mask = (1 << fls(max)) - 1;
	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 = max - 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_volsw, tpa6130a2_put_volsw,
		       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_volsw, tpa6130a2_put_volsw,
		       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;
		val &= ~TPA6130A2_SWS;
		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);
	}
}

int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
{
	int ret = 0;
	if (enable) {
		ret = tpa6130a2_power(1);
		if (ret < 0)
			return ret;
		tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
					 1);
	} else {
		tpa6130a2_channel_enable(TPA6130A2_HP_EN_R | TPA6130A2_HP_EN_L,
					 0);
		ret = tpa6130a2_power(0);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);

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

	if (tpa6130a2_client == NULL)
		return -ENODEV;

	data = i2c_get_clientdata(tpa6130a2_client);

	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;
	const char *regulator;
	int 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) {
	default:
		dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
			 pdata->id);
	case TPA6130A2:
		regulator = "Vdd";
		break;
	case TPA6140A2:
		regulator = "AVdd";
		break;
	}

	data->supply = regulator_get(dev, regulator);
	if (IS_ERR(data->supply)) {
		ret = PTR_ERR(data->supply);
		dev_err(dev, "Failed to request supply: %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_put(data->supply);
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_put(data->supply);

	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>
5a0e3ad6	29	#include <linux/slab.h>
493b67ef PU	30	#include <sound/tpa6130a2-plat.h>
493b67ef PU	31	#include <sound/soc.h>
493b67ef PU	32	#include <sound/tlv.h>
	33
	34	#include "tpa6130a2.h"
	35
ebab1b1d	36	static struct i2c_client *tpa6130a2_client;
493b67ef PU	37
	38	/* This struct is used to save the context */
	39	struct tpa6130a2_data {
	40	struct mutex mutex;
	41	unsigned char regs[TPA6130A2_CACHEREGNUM];
ad8332c1	42	struct regulator *supply;
493b67ef	43	int power_gpio;
d5876ce1	44	u8 power_state:1;
e5e5b31e	45	enum tpa_model id;
493b67ef PU	46	};
	47
	48	static int tpa6130a2_i2c_read(int reg)
	49	{
	50	struct tpa6130a2_data *data;
	51	int val;
	52
	53	BUG_ON(tpa6130a2_client == NULL);
	54	data = i2c_get_clientdata(tpa6130a2_client);
	55
	56	/* If powered off, return the cached value */
	57	if (data->power_state) {
	58	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	59	if (val < 0)
	60	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	61	else
	62	data->regs[reg] = val;
	63	} else {
	64	val = data->regs[reg];
	65	}
	66
	67	return val;
	68	}
	69
	70	static int tpa6130a2_i2c_write(int reg, u8 value)
	71	{
	72	struct tpa6130a2_data *data;
	73	int val = 0;
	74
	75	BUG_ON(tpa6130a2_client == NULL);
	76	data = i2c_get_clientdata(tpa6130a2_client);
	77
	78	if (data->power_state) {
	79	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
7a479b02	80	if (val < 0) {
493b67ef	81	dev_err(&tpa6130a2_client->dev, "Write failed\n");
7a479b02 AL	82	return val;
7a479b02 AL	83	}
493b67ef PU	84	}
	85
	86	/* Either powered on or off, we save the context */
	87	data->regs[reg] = value;
	88
	89	return val;
	90	}
	91
	92	static u8 tpa6130a2_read(int reg)
	93	{
	94	struct tpa6130a2_data *data;
	95
	96	BUG_ON(tpa6130a2_client == NULL);
	97	data = i2c_get_clientdata(tpa6130a2_client);
	98
	99	return data->regs[reg];
	100	}
	101
872a64d7	102	static int tpa6130a2_initialize(void)
493b67ef PU	103	{
493b67ef PU	104	struct tpa6130a2_data *data;
872a64d7	105	int i, ret = 0;
493b67ef PU	106
	107	BUG_ON(tpa6130a2_client == NULL);
	108	data = i2c_get_clientdata(tpa6130a2_client);
	109
872a64d7 PU	110	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
	111	ret = tpa6130a2_i2c_write(i, data->regs[i]);
	112	if (ret < 0)
	113	break;
	114	}
	115
	116	return ret;
493b67ef PU	117	}
493b67ef PU	118
d5876ce1	119	static int tpa6130a2_power(u8 power)
493b67ef PU	120	{
	121	struct tpa6130a2_data *data;
	122	u8 val;
75e3f313	123	int ret = 0;
493b67ef PU	124
	125	BUG_ON(tpa6130a2_client == NULL);
	126	data = i2c_get_clientdata(tpa6130a2_client);
	127
	128	mutex_lock(&data->mutex);
d5876ce1 PU	129	if (power == data->power_state)
d5876ce1 PU	130	goto exit;
7c4e6492	131
d5876ce1	132	if (power) {
ad8332c1	133	ret = regulator_enable(data->supply);
7c4e6492 IK	134	if (ret != 0) {
7c4e6492 IK	135	dev_err(&tpa6130a2_client->dev,
ad8332c1	136	"Failed to enable supply: %d\n", ret);
7c4e6492	137	goto exit;
493b67ef	138	}
0656f6cf JN	139	/* Power on */
	140	if (data->power_gpio >= 0)
	141	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	142
7c4e6492 IK	143	data->power_state = 1;
872a64d7 PU	144	ret = tpa6130a2_initialize();
	145	if (ret < 0) {
	146	dev_err(&tpa6130a2_client->dev,
	147	"Failed to initialize chip\n");
	148	if (data->power_gpio >= 0)
	149	gpio_set_value(data->power_gpio, 0);
	150	regulator_disable(data->supply);
	151	data->power_state = 0;
	152	goto exit;
	153	}
d5876ce1	154	} else {
493b67ef PU	155	/* set SWS */
	156	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	157	val \|= TPA6130A2_SWS;
	158	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	159
493b67ef	160	/* Power off */
7c4e6492	161	if (data->power_gpio >= 0)
493b67ef	162	gpio_set_value(data->power_gpio, 0);
7c4e6492	163
ad8332c1	164	ret = regulator_disable(data->supply);
7c4e6492 IK	165	if (ret != 0) {
7c4e6492 IK	166	dev_err(&tpa6130a2_client->dev,
ad8332c1	167	"Failed to disable supply: %d\n", ret);
7c4e6492	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	}
493b67ef PU	178
bd843edf	179	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	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;
bd843edf PU	187	int max = mc->max;
bd843edf PU	188	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	189	unsigned int invert = mc->invert;
	190
	191	BUG_ON(tpa6130a2_client == NULL);
	192	data = i2c_get_clientdata(tpa6130a2_client);
	193
	194	mutex_lock(&data->mutex);
	195
	196	ucontrol->value.integer.value[0] =
	197	(tpa6130a2_read(reg) >> shift) & mask;
	198
	199	if (invert)
	200	ucontrol->value.integer.value[0] =
bd843edf	201	max - ucontrol->value.integer.value[0];
493b67ef PU	202
	203	mutex_unlock(&data->mutex);
	204	return 0;
	205	}
	206
bd843edf	207	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	208	struct snd_ctl_elem_value *ucontrol)
	209	{
	210	struct soc_mixer_control *mc =
	211	(struct soc_mixer_control *)kcontrol->private_value;
	212	struct tpa6130a2_data *data;
	213	unsigned int reg = mc->reg;
	214	unsigned int shift = mc->shift;
bd843edf PU	215	int max = mc->max;
bd843edf PU	216	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	217	unsigned int invert = mc->invert;
	218	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	219	unsigned int val_reg;
	220
	221	BUG_ON(tpa6130a2_client == NULL);
	222	data = i2c_get_clientdata(tpa6130a2_client);
	223
	224	if (invert)
bd843edf	225	val = max - val;
493b67ef PU	226
	227	mutex_lock(&data->mutex);
	228
	229	val_reg = tpa6130a2_read(reg);
	230	if (((val_reg >> shift) & mask) == val) {
	231	mutex_unlock(&data->mutex);
	232	return 0;
	233	}
	234
	235	val_reg &= ~(mask << shift);
	236	val_reg \|= val << shift;
	237	tpa6130a2_i2c_write(reg, val_reg);
	238
	239	mutex_unlock(&data->mutex);
	240
	241	return 1;
	242	}
	243
	244	/*
	245	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	246	* down in gain.
	247	*/
	248	static const unsigned int tpa6130_tlv[] = {
	249	TLV_DB_RANGE_HEAD(10),
	250	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	251	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	252	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	253	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	254	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	255	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	256	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	257	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	258	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	259	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	260	};
	261
	262	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	263	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	264	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	265	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	266	tpa6130_tlv),
	267	};
	268
e5e5b31e PU	269	static const unsigned int tpa6140_tlv[] = {
	270	TLV_DB_RANGE_HEAD(3),
	271	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	272	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	273	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	274	};
	275
	276	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	277	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	278	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	279	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	280	tpa6140_tlv),
e5e5b31e PU	281	};
e5e5b31e PU	282
493b67ef PU	283	/*
	284	* Enable or disable channel (left or right)
	285	* The bit number for mute and amplifier are the same per channel:
	286	* bit 6: Right channel
	287	* bit 7: Left channel
	288	* in both registers.
	289	*/
	290	static void tpa6130a2_channel_enable(u8 channel, int enable)
	291	{
493b67ef PU	292	u8 val;
493b67ef PU	293
493b67ef PU	294	if (enable) {
	295	/* Enable channel */
	296	/* Enable amplifier */
	297	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	298	val \|= channel;
d534bacd	299	val &= ~TPA6130A2_SWS;
493b67ef PU	300	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	301
	302	/* Unmute channel */
	303	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	304	val &= ~channel;
	305	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	306	} else {
	307	/* Disable channel */
	308	/* Mute channel */
	309	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	310	val \|= channel;
	311	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	312
	313	/* Disable amplifier */
	314	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	315	val &= ~channel;
	316	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	317	}
	318	}
	319
39646871	320	int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
493b67ef	321	{
7c4e6492	322	int ret = 0;
39646871	323	if (enable) {
7c4e6492	324	ret = tpa6130a2_power(1);
39646871 PU	325	if (ret < 0)
	326	return ret;
	327	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	328	1);
	329	} else {
	330	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	331	0);
7c4e6492	332	ret = tpa6130a2_power(0);
493b67ef	333	}
39646871	334
7c4e6492	335	return ret;
493b67ef	336	}
39646871	337	EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
493b67ef PU	338
	339	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	340	{
e5e5b31e PU	341	struct tpa6130a2_data *data;
e5e5b31e PU	342
872a64d7 PU	343	if (tpa6130a2_client == NULL)
	344	return -ENODEV;
	345
e5e5b31e PU	346	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	347
e5e5b31e PU	348	if (data->id == TPA6140A2)
	349	return snd_soc_add_controls(codec, tpa6140a2_controls,
	350	ARRAY_SIZE(tpa6140a2_controls));
	351	else
	352	return snd_soc_add_controls(codec, tpa6130a2_controls,
	353	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	354	}
	355	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	356
735fe4cf MB	357	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	358	const struct i2c_device_id *id)
493b67ef PU	359	{
	360	struct device *dev;
	361	struct tpa6130a2_data *data;
	362	struct tpa6130a2_platform_data *pdata;
ad8332c1 JN	363	const char *regulator;
ad8332c1 JN	364	int ret;
493b67ef PU	365
	366	dev = &client->dev;
	367
	368	if (client->dev.platform_data == NULL) {
	369	dev_err(dev, "Platform data not set\n");
	370	dump_stack();
	371	return -ENODEV;
	372	}
	373
	374	data = kzalloc(sizeof(*data), GFP_KERNEL);
	375	if (data == NULL) {
	376	dev_err(dev, "Can not allocate memory\n");
	377	return -ENOMEM;
	378	}
	379
	380	tpa6130a2_client = client;
	381
	382	i2c_set_clientdata(tpa6130a2_client, data);
	383
ebab1b1d	384	pdata = client->dev.platform_data;
493b67ef	385	data->power_gpio = pdata->power_gpio;
e5e5b31e	386	data->id = pdata->id;
493b67ef PU	387
	388	mutex_init(&data->mutex);
	389
	390	/* Set default register values */
	391	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	392	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	393	TPA6130A2_MUTE_L;
	394
	395	if (data->power_gpio >= 0) {
	396	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	397	if (ret < 0) {
	398	dev_err(dev, "Failed to request power GPIO (%d)\n",
	399	data->power_gpio);
7c4e6492	400	goto err_gpio;
493b67ef PU	401	}
493b67ef PU	402	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	403	}
493b67ef PU	404
e5e5b31e	405	switch (data->id) {
ad8332c1 JN	406	default:
	407	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	408	pdata->id);
2138301e	409	case TPA6130A2:
ad8332c1	410	regulator = "Vdd";
2138301e IK	411	break;
2138301e IK	412	case TPA6140A2:
ad8332c1	413	regulator = "AVdd";
2138301e	414	break;
2138301e	415	}
7c4e6492	416
ad8332c1 JN	417	data->supply = regulator_get(dev, regulator);
	418	if (IS_ERR(data->supply)) {
	419	ret = PTR_ERR(data->supply);
	420	dev_err(dev, "Failed to request supply: %d\n", ret);
7c4e6492 IK	421	goto err_regulator;
	422	}
	423
	424	ret = tpa6130a2_power(1);
	425	if (ret != 0)
	426	goto err_power;
	427
493b67ef PU	428
	429	/* Read version */
	430	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	431	TPA6130A2_VERSION_MASK;
	432	if ((ret != 1) && (ret != 2))
	433	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	434
	435	/* Disable the chip */
7c4e6492 IK	436	ret = tpa6130a2_power(0);
	437	if (ret != 0)
	438	goto err_power;
493b67ef PU	439
493b67ef PU	440	return 0;
7c4e6492 IK	441
7c4e6492 IK	442	err_power:
ad8332c1	443	regulator_put(data->supply);
7c4e6492 IK	444	err_regulator:
	445	if (data->power_gpio >= 0)
	446	gpio_free(data->power_gpio);
	447	err_gpio:
493b67ef PU	448	kfree(data);
493b67ef PU	449	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	450	tpa6130a2_client = NULL;
493b67ef PU	451
	452	return ret;
	453	}
	454
735fe4cf	455	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	456	{
	457	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	458
	459	tpa6130a2_power(0);
	460
	461	if (data->power_gpio >= 0)
	462	gpio_free(data->power_gpio);
7c4e6492	463
ad8332c1	464	regulator_put(data->supply);
7c4e6492	465
493b67ef	466	kfree(data);
ebab1b1d	467	tpa6130a2_client = NULL;
493b67ef PU	468
	469	return 0;
	470	}
	471
	472	static const struct i2c_device_id tpa6130a2_id[] = {
	473	{ "tpa6130a2", 0 },
	474	{ }
	475	};
	476	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	477
	478	static struct i2c_driver tpa6130a2_i2c_driver = {
	479	.driver = {
	480	.name = "tpa6130a2",
	481	.owner = THIS_MODULE,
	482	},
	483	.probe = tpa6130a2_probe,
	484	.remove = __devexit_p(tpa6130a2_remove),
	485	.id_table = tpa6130a2_id,
	486	};
	487
	488	static int __init tpa6130a2_init(void)
	489	{
	490	return i2c_add_driver(&tpa6130a2_i2c_driver);
	491	}
	492
	493	static void __exit tpa6130a2_exit(void)
	494	{
	495	i2c_del_driver(&tpa6130a2_i2c_driver);
	496	}
	497
	498	MODULE_AUTHOR("Peter Ujfalusi");
	499	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	500	MODULE_LICENSE("GPL");
	501
	502	module_init(tpa6130a2_init);
	503	module_exit(tpa6130a2_exit);