[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@ti.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"

enum tpa_model {
	TPA6130A2,
	TPA6140A2,
};

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 = id->driver_data;

	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",
			 data->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);
	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", TPA6130A2 },
	{ "tpa6140a2", TPA6140A2 },
	{ }
};
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 <peter.ujfalusi@ti.com>");
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	*
b4079ef4	6	* Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
493b67ef PU	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
0722d055 PU	36	enum tpa_model {
	37	TPA6130A2,
	38	TPA6140A2,
	39	};
	40
ebab1b1d	41	static struct i2c_client *tpa6130a2_client;
493b67ef PU	42
	43	/* This struct is used to save the context */
	44	struct tpa6130a2_data {
	45	struct mutex mutex;
	46	unsigned char regs[TPA6130A2_CACHEREGNUM];
ad8332c1	47	struct regulator *supply;
493b67ef	48	int power_gpio;
d5876ce1	49	u8 power_state:1;
e5e5b31e	50	enum tpa_model id;
493b67ef PU	51	};
	52
	53	static int tpa6130a2_i2c_read(int reg)
	54	{
	55	struct tpa6130a2_data *data;
	56	int val;
	57
	58	BUG_ON(tpa6130a2_client == NULL);
	59	data = i2c_get_clientdata(tpa6130a2_client);
	60
	61	/* If powered off, return the cached value */
	62	if (data->power_state) {
	63	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	64	if (val < 0)
	65	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	66	else
	67	data->regs[reg] = val;
	68	} else {
	69	val = data->regs[reg];
	70	}
	71
	72	return val;
	73	}
	74
	75	static int tpa6130a2_i2c_write(int reg, u8 value)
	76	{
	77	struct tpa6130a2_data *data;
	78	int val = 0;
	79
	80	BUG_ON(tpa6130a2_client == NULL);
	81	data = i2c_get_clientdata(tpa6130a2_client);
	82
	83	if (data->power_state) {
	84	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
7a479b02	85	if (val < 0) {
493b67ef	86	dev_err(&tpa6130a2_client->dev, "Write failed\n");
7a479b02 AL	87	return val;
7a479b02 AL	88	}
493b67ef PU	89	}
	90
	91	/* Either powered on or off, we save the context */
	92	data->regs[reg] = value;
	93
	94	return val;
	95	}
	96
	97	static u8 tpa6130a2_read(int reg)
	98	{
	99	struct tpa6130a2_data *data;
	100
	101	BUG_ON(tpa6130a2_client == NULL);
	102	data = i2c_get_clientdata(tpa6130a2_client);
	103
	104	return data->regs[reg];
	105	}
	106
872a64d7	107	static int tpa6130a2_initialize(void)
493b67ef PU	108	{
493b67ef PU	109	struct tpa6130a2_data *data;
872a64d7	110	int i, ret = 0;
493b67ef PU	111
	112	BUG_ON(tpa6130a2_client == NULL);
	113	data = i2c_get_clientdata(tpa6130a2_client);
	114
872a64d7 PU	115	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
	116	ret = tpa6130a2_i2c_write(i, data->regs[i]);
	117	if (ret < 0)
	118	break;
	119	}
	120
	121	return ret;
493b67ef PU	122	}
493b67ef PU	123
d5876ce1	124	static int tpa6130a2_power(u8 power)
493b67ef PU	125	{
	126	struct tpa6130a2_data *data;
	127	u8 val;
75e3f313	128	int ret = 0;
493b67ef PU	129
	130	BUG_ON(tpa6130a2_client == NULL);
	131	data = i2c_get_clientdata(tpa6130a2_client);
	132
	133	mutex_lock(&data->mutex);
d5876ce1 PU	134	if (power == data->power_state)
d5876ce1 PU	135	goto exit;
7c4e6492	136
d5876ce1	137	if (power) {
ad8332c1	138	ret = regulator_enable(data->supply);
7c4e6492 IK	139	if (ret != 0) {
7c4e6492 IK	140	dev_err(&tpa6130a2_client->dev,
ad8332c1	141	"Failed to enable supply: %d\n", ret);
7c4e6492	142	goto exit;
493b67ef	143	}
0656f6cf JN	144	/* Power on */
	145	if (data->power_gpio >= 0)
	146	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	147
7c4e6492 IK	148	data->power_state = 1;
872a64d7 PU	149	ret = tpa6130a2_initialize();
	150	if (ret < 0) {
	151	dev_err(&tpa6130a2_client->dev,
	152	"Failed to initialize chip\n");
	153	if (data->power_gpio >= 0)
	154	gpio_set_value(data->power_gpio, 0);
	155	regulator_disable(data->supply);
	156	data->power_state = 0;
	157	goto exit;
	158	}
d5876ce1	159	} else {
493b67ef PU	160	/* set SWS */
	161	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	162	val \|= TPA6130A2_SWS;
	163	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	164
493b67ef	165	/* Power off */
7c4e6492	166	if (data->power_gpio >= 0)
493b67ef	167	gpio_set_value(data->power_gpio, 0);
7c4e6492	168
ad8332c1	169	ret = regulator_disable(data->supply);
7c4e6492 IK	170	if (ret != 0) {
7c4e6492 IK	171	dev_err(&tpa6130a2_client->dev,
ad8332c1	172	"Failed to disable supply: %d\n", ret);
7c4e6492	173	goto exit;
493b67ef	174	}
7c4e6492 IK	175
7c4e6492 IK	176	data->power_state = 0;
493b67ef	177	}
7c4e6492 IK	178
7c4e6492 IK	179	exit:
493b67ef	180	mutex_unlock(&data->mutex);
7c4e6492	181	return ret;
493b67ef PU	182	}
493b67ef PU	183
bd843edf	184	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	185	struct snd_ctl_elem_value *ucontrol)
	186	{
	187	struct soc_mixer_control *mc =
	188	(struct soc_mixer_control *)kcontrol->private_value;
	189	struct tpa6130a2_data *data;
	190	unsigned int reg = mc->reg;
	191	unsigned int shift = mc->shift;
bd843edf PU	192	int max = mc->max;
bd843edf PU	193	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	194	unsigned int invert = mc->invert;
	195
	196	BUG_ON(tpa6130a2_client == NULL);
	197	data = i2c_get_clientdata(tpa6130a2_client);
	198
	199	mutex_lock(&data->mutex);
	200
	201	ucontrol->value.integer.value[0] =
	202	(tpa6130a2_read(reg) >> shift) & mask;
	203
	204	if (invert)
	205	ucontrol->value.integer.value[0] =
bd843edf	206	max - ucontrol->value.integer.value[0];
493b67ef PU	207
	208	mutex_unlock(&data->mutex);
	209	return 0;
	210	}
	211
bd843edf	212	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	213	struct snd_ctl_elem_value *ucontrol)
	214	{
	215	struct soc_mixer_control *mc =
	216	(struct soc_mixer_control *)kcontrol->private_value;
	217	struct tpa6130a2_data *data;
	218	unsigned int reg = mc->reg;
	219	unsigned int shift = mc->shift;
bd843edf PU	220	int max = mc->max;
bd843edf PU	221	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	222	unsigned int invert = mc->invert;
	223	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	224	unsigned int val_reg;
	225
	226	BUG_ON(tpa6130a2_client == NULL);
	227	data = i2c_get_clientdata(tpa6130a2_client);
	228
	229	if (invert)
bd843edf	230	val = max - val;
493b67ef PU	231
	232	mutex_lock(&data->mutex);
	233
	234	val_reg = tpa6130a2_read(reg);
	235	if (((val_reg >> shift) & mask) == val) {
	236	mutex_unlock(&data->mutex);
	237	return 0;
	238	}
	239
	240	val_reg &= ~(mask << shift);
	241	val_reg \|= val << shift;
	242	tpa6130a2_i2c_write(reg, val_reg);
	243
	244	mutex_unlock(&data->mutex);
	245
	246	return 1;
	247	}
	248
	249	/*
	250	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	251	* down in gain.
	252	*/
	253	static const unsigned int tpa6130_tlv[] = {
	254	TLV_DB_RANGE_HEAD(10),
	255	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	256	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	257	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	258	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	259	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	260	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	261	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	262	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	263	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	264	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	265	};
	266
	267	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	268	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	269	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	270	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	271	tpa6130_tlv),
	272	};
	273
e5e5b31e PU	274	static const unsigned int tpa6140_tlv[] = {
	275	TLV_DB_RANGE_HEAD(3),
	276	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	277	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	278	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	279	};
	280
	281	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	282	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	283	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	284	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	285	tpa6140_tlv),
e5e5b31e PU	286	};
e5e5b31e PU	287
493b67ef PU	288	/*
	289	* Enable or disable channel (left or right)
	290	* The bit number for mute and amplifier are the same per channel:
	291	* bit 6: Right channel
	292	* bit 7: Left channel
	293	* in both registers.
	294	*/
	295	static void tpa6130a2_channel_enable(u8 channel, int enable)
	296	{
493b67ef PU	297	u8 val;
493b67ef PU	298
493b67ef PU	299	if (enable) {
	300	/* Enable channel */
	301	/* Enable amplifier */
	302	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	303	val \|= channel;
d534bacd	304	val &= ~TPA6130A2_SWS;
493b67ef PU	305	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	306
	307	/* Unmute channel */
	308	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	309	val &= ~channel;
	310	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	311	} else {
	312	/* Disable channel */
	313	/* Mute channel */
	314	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	315	val \|= channel;
	316	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	317
	318	/* Disable amplifier */
	319	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	320	val &= ~channel;
	321	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	322	}
	323	}
	324
39646871	325	int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
493b67ef	326	{
7c4e6492	327	int ret = 0;
39646871	328	if (enable) {
7c4e6492	329	ret = tpa6130a2_power(1);
39646871 PU	330	if (ret < 0)
	331	return ret;
	332	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	333	1);
	334	} else {
	335	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	336	0);
7c4e6492	337	ret = tpa6130a2_power(0);
493b67ef	338	}
39646871	339
7c4e6492	340	return ret;
493b67ef	341	}
39646871	342	EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
493b67ef PU	343
	344	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	345	{
e5e5b31e PU	346	struct tpa6130a2_data *data;
e5e5b31e PU	347
872a64d7 PU	348	if (tpa6130a2_client == NULL)
	349	return -ENODEV;
	350
e5e5b31e PU	351	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	352
e5e5b31e PU	353	if (data->id == TPA6140A2)
	354	return snd_soc_add_controls(codec, tpa6140a2_controls,
	355	ARRAY_SIZE(tpa6140a2_controls));
	356	else
	357	return snd_soc_add_controls(codec, tpa6130a2_controls,
	358	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	359	}
	360	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	361
735fe4cf MB	362	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	363	const struct i2c_device_id *id)
493b67ef PU	364	{
	365	struct device *dev;
	366	struct tpa6130a2_data *data;
	367	struct tpa6130a2_platform_data *pdata;
ad8332c1 JN	368	const char *regulator;
ad8332c1 JN	369	int ret;
493b67ef PU	370
	371	dev = &client->dev;
	372
	373	if (client->dev.platform_data == NULL) {
	374	dev_err(dev, "Platform data not set\n");
	375	dump_stack();
	376	return -ENODEV;
	377	}
	378
	379	data = kzalloc(sizeof(*data), GFP_KERNEL);
	380	if (data == NULL) {
	381	dev_err(dev, "Can not allocate memory\n");
	382	return -ENOMEM;
	383	}
	384
	385	tpa6130a2_client = client;
	386
	387	i2c_set_clientdata(tpa6130a2_client, data);
	388
ebab1b1d	389	pdata = client->dev.platform_data;
493b67ef	390	data->power_gpio = pdata->power_gpio;
07441006	391	data->id = id->driver_data;
493b67ef PU	392
	393	mutex_init(&data->mutex);
	394
	395	/* Set default register values */
	396	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	397	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	398	TPA6130A2_MUTE_L;
	399
	400	if (data->power_gpio >= 0) {
	401	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	402	if (ret < 0) {
	403	dev_err(dev, "Failed to request power GPIO (%d)\n",
	404	data->power_gpio);
7c4e6492	405	goto err_gpio;
493b67ef PU	406	}
493b67ef PU	407	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	408	}
493b67ef PU	409
e5e5b31e	410	switch (data->id) {
ad8332c1 JN	411	default:
ad8332c1 JN	412	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
07441006	413	data->id);
2138301e	414	case TPA6130A2:
ad8332c1	415	regulator = "Vdd";
2138301e IK	416	break;
2138301e IK	417	case TPA6140A2:
ad8332c1	418	regulator = "AVdd";
2138301e	419	break;
2138301e	420	}
7c4e6492	421
ad8332c1 JN	422	data->supply = regulator_get(dev, regulator);
	423	if (IS_ERR(data->supply)) {
	424	ret = PTR_ERR(data->supply);
	425	dev_err(dev, "Failed to request supply: %d\n", ret);
7c4e6492 IK	426	goto err_regulator;
	427	}
	428
	429	ret = tpa6130a2_power(1);
	430	if (ret != 0)
	431	goto err_power;
	432
493b67ef PU	433
	434	/* Read version */
	435	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	436	TPA6130A2_VERSION_MASK;
	437	if ((ret != 1) && (ret != 2))
	438	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	439
	440	/* Disable the chip */
7c4e6492 IK	441	ret = tpa6130a2_power(0);
	442	if (ret != 0)
	443	goto err_power;
493b67ef PU	444
493b67ef PU	445	return 0;
7c4e6492 IK	446
7c4e6492 IK	447	err_power:
ad8332c1	448	regulator_put(data->supply);
7c4e6492 IK	449	err_regulator:
	450	if (data->power_gpio >= 0)
	451	gpio_free(data->power_gpio);
	452	err_gpio:
493b67ef	453	kfree(data);
ebab1b1d	454	tpa6130a2_client = NULL;
493b67ef PU	455
	456	return ret;
	457	}
	458
735fe4cf	459	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	460	{
	461	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	462
	463	tpa6130a2_power(0);
	464
	465	if (data->power_gpio >= 0)
	466	gpio_free(data->power_gpio);
7c4e6492	467
ad8332c1	468	regulator_put(data->supply);
7c4e6492	469
493b67ef	470	kfree(data);
ebab1b1d	471	tpa6130a2_client = NULL;
493b67ef PU	472
	473	return 0;
	474	}
	475
	476	static const struct i2c_device_id tpa6130a2_id[] = {
07441006 PU	477	{ "tpa6130a2", TPA6130A2 },
07441006 PU	478	{ "tpa6140a2", TPA6140A2 },
493b67ef PU	479	{ }
	480	};
	481	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	482
	483	static struct i2c_driver tpa6130a2_i2c_driver = {
	484	.driver = {
	485	.name = "tpa6130a2",
	486	.owner = THIS_MODULE,
	487	},
	488	.probe = tpa6130a2_probe,
	489	.remove = __devexit_p(tpa6130a2_remove),
	490	.id_table = tpa6130a2_id,
	491	};
	492
	493	static int __init tpa6130a2_init(void)
	494	{
	495	return i2c_add_driver(&tpa6130a2_i2c_driver);
	496	}
	497
	498	static void __exit tpa6130a2_exit(void)
	499	{
	500	i2c_del_driver(&tpa6130a2_i2c_driver);
	501	}
	502
b4079ef4	503	MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
493b67ef PU	504	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	505	MODULE_LICENSE("GPL");
	506
	507	module_init(tpa6130a2_init);
	508	module_exit(tpa6130a2_exit);