[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 <linux/of.h>
#include <linux/of_gpio.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;

	if (WARN_ON(!tpa6130a2_client))
		return -EINVAL;
	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;

	if (WARN_ON(!tpa6130a2_client))
		return -EINVAL;
	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;

	if (WARN_ON(!tpa6130a2_client))
		return 0;
	data = i2c_get_clientdata(tpa6130a2_client);

	return data->regs[reg];
}

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

	if (WARN_ON(!tpa6130a2_client))
		return -EINVAL;
	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;

	if (WARN_ON(!tpa6130a2_client))
		return -EINVAL;
	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;

	if (WARN_ON(!tpa6130a2_client))
		return -EINVAL;
	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;

	if (WARN_ON(!tpa6130a2_client))
		return -EINVAL;
	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_codec_controls(codec, tpa6140a2_controls,
						ARRAY_SIZE(tpa6140a2_controls));
	else
		return snd_soc_add_codec_controls(codec, tpa6130a2_controls,
						ARRAY_SIZE(tpa6130a2_controls));
}
EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);

static int tpa6130a2_probe(struct i2c_client *client,
			   const struct i2c_device_id *id)
{
	struct device *dev;
	struct tpa6130a2_data *data;
	struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
	struct device_node *np = client->dev.of_node;
	const char *regulator;
	int ret;

	dev = &client->dev;

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

	if (pdata) {
		data->power_gpio = pdata->power_gpio;
	} else if (np) {
		data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
	} else {
		dev_err(dev, "Platform data not set\n");
		dump_stack();
		return -ENODEV;
	}

	tpa6130a2_client = client;

	i2c_set_clientdata(tpa6130a2_client, data);

	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 = devm_gpio_request(dev, 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 = devm_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_gpio;
	}

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


	/* 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_gpio;

	return 0;

err_gpio:
	tpa6130a2_client = NULL;

	return ret;
}

static int tpa6130a2_remove(struct i2c_client *client)
{
	tpa6130a2_power(0);
	tpa6130a2_client = NULL;

	return 0;
}

static const struct i2c_device_id tpa6130a2_id[] = {
	{ "tpa6130a2", TPA6130A2 },
	{ "tpa6140a2", TPA6140A2 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);

#if IS_ENABLED(CONFIG_OF)
static const struct of_device_id tpa6130a2_of_match[] = {
	{ .compatible = "ti,tpa6130a2", },
	{ .compatible = "ti,tpa6140a2" },
	{},
};
MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
#endif

static struct i2c_driver tpa6130a2_i2c_driver = {
	.driver = {
		.name = "tpa6130a2",
		.owner = THIS_MODULE,
		.of_match_table = of_match_ptr(tpa6130a2_of_match),
	},
	.probe = tpa6130a2_probe,
	.remove = tpa6130a2_remove,
	.id_table = tpa6130a2_id,
};

module_i2c_driver(tpa6130a2_i2c_driver);

MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
MODULE_LICENSE("GPL");
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	32	#include <sound/tlv.h>
ee5e4534	33	#include <linux/of.h>
f95a4883	34	#include <linux/of_gpio.h>
493b67ef PU	35
	36	#include "tpa6130a2.h"
	37
0722d055 PU	38	enum tpa_model {
	39	TPA6130A2,
	40	TPA6140A2,
	41	};
	42
ebab1b1d	43	static struct i2c_client *tpa6130a2_client;
493b67ef PU	44
	45	/* This struct is used to save the context */
	46	struct tpa6130a2_data {
	47	struct mutex mutex;
	48	unsigned char regs[TPA6130A2_CACHEREGNUM];
ad8332c1	49	struct regulator *supply;
493b67ef	50	int power_gpio;
d5876ce1	51	u8 power_state:1;
e5e5b31e	52	enum tpa_model id;
493b67ef PU	53	};
	54
	55	static int tpa6130a2_i2c_read(int reg)
	56	{
	57	struct tpa6130a2_data *data;
	58	int val;
	59
773392b2 TI	60	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	61	return -EINVAL;
493b67ef PU	62	data = i2c_get_clientdata(tpa6130a2_client);
	63
	64	/* If powered off, return the cached value */
	65	if (data->power_state) {
	66	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	67	if (val < 0)
	68	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	69	else
	70	data->regs[reg] = val;
	71	} else {
	72	val = data->regs[reg];
	73	}
	74
	75	return val;
	76	}
	77
	78	static int tpa6130a2_i2c_write(int reg, u8 value)
	79	{
	80	struct tpa6130a2_data *data;
	81	int val = 0;
	82
773392b2 TI	83	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	84	return -EINVAL;
493b67ef PU	85	data = i2c_get_clientdata(tpa6130a2_client);
	86
	87	if (data->power_state) {
	88	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
7a479b02	89	if (val < 0) {
493b67ef	90	dev_err(&tpa6130a2_client->dev, "Write failed\n");
7a479b02 AL	91	return val;
7a479b02 AL	92	}
493b67ef PU	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
773392b2 TI	105	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	106	return 0;
493b67ef PU	107	data = i2c_get_clientdata(tpa6130a2_client);
	108
	109	return data->regs[reg];
	110	}
	111
872a64d7	112	static int tpa6130a2_initialize(void)
493b67ef PU	113	{
493b67ef PU	114	struct tpa6130a2_data *data;
872a64d7	115	int i, ret = 0;
493b67ef	116
773392b2 TI	117	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	118	return -EINVAL;
493b67ef PU	119	data = i2c_get_clientdata(tpa6130a2_client);
493b67ef PU	120
872a64d7 PU	121	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
	122	ret = tpa6130a2_i2c_write(i, data->regs[i]);
	123	if (ret < 0)
	124	break;
	125	}
	126
	127	return ret;
493b67ef PU	128	}
493b67ef PU	129
d5876ce1	130	static int tpa6130a2_power(u8 power)
493b67ef PU	131	{
	132	struct tpa6130a2_data *data;
	133	u8 val;
75e3f313	134	int ret = 0;
493b67ef	135
773392b2 TI	136	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	137	return -EINVAL;
493b67ef PU	138	data = i2c_get_clientdata(tpa6130a2_client);
	139
	140	mutex_lock(&data->mutex);
d5876ce1 PU	141	if (power == data->power_state)
d5876ce1 PU	142	goto exit;
7c4e6492	143
d5876ce1	144	if (power) {
ad8332c1	145	ret = regulator_enable(data->supply);
7c4e6492 IK	146	if (ret != 0) {
7c4e6492 IK	147	dev_err(&tpa6130a2_client->dev,
ad8332c1	148	"Failed to enable supply: %d\n", ret);
7c4e6492	149	goto exit;
493b67ef	150	}
0656f6cf JN	151	/* Power on */
	152	if (data->power_gpio >= 0)
	153	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	154
7c4e6492 IK	155	data->power_state = 1;
872a64d7 PU	156	ret = tpa6130a2_initialize();
	157	if (ret < 0) {
	158	dev_err(&tpa6130a2_client->dev,
	159	"Failed to initialize chip\n");
	160	if (data->power_gpio >= 0)
	161	gpio_set_value(data->power_gpio, 0);
	162	regulator_disable(data->supply);
	163	data->power_state = 0;
	164	goto exit;
	165	}
d5876ce1	166	} else {
493b67ef PU	167	/* set SWS */
	168	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	169	val \|= TPA6130A2_SWS;
	170	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	171
493b67ef	172	/* Power off */
7c4e6492	173	if (data->power_gpio >= 0)
493b67ef	174	gpio_set_value(data->power_gpio, 0);
7c4e6492	175
ad8332c1	176	ret = regulator_disable(data->supply);
7c4e6492 IK	177	if (ret != 0) {
7c4e6492 IK	178	dev_err(&tpa6130a2_client->dev,
ad8332c1	179	"Failed to disable supply: %d\n", ret);
7c4e6492	180	goto exit;
493b67ef	181	}
7c4e6492 IK	182
7c4e6492 IK	183	data->power_state = 0;
493b67ef	184	}
7c4e6492 IK	185
7c4e6492 IK	186	exit:
493b67ef	187	mutex_unlock(&data->mutex);
7c4e6492	188	return ret;
493b67ef PU	189	}
493b67ef PU	190
bd843edf	191	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	192	struct snd_ctl_elem_value *ucontrol)
	193	{
	194	struct soc_mixer_control *mc =
	195	(struct soc_mixer_control *)kcontrol->private_value;
	196	struct tpa6130a2_data *data;
	197	unsigned int reg = mc->reg;
	198	unsigned int shift = mc->shift;
bd843edf PU	199	int max = mc->max;
bd843edf PU	200	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	201	unsigned int invert = mc->invert;
493b67ef PU	202
773392b2 TI	203	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	204	return -EINVAL;
493b67ef PU	205	data = i2c_get_clientdata(tpa6130a2_client);
	206
	207	mutex_lock(&data->mutex);
	208
	209	ucontrol->value.integer.value[0] =
	210	(tpa6130a2_read(reg) >> shift) & mask;
	211
	212	if (invert)
	213	ucontrol->value.integer.value[0] =
bd843edf	214	max - ucontrol->value.integer.value[0];
493b67ef PU	215
	216	mutex_unlock(&data->mutex);
	217	return 0;
	218	}
	219
bd843edf	220	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	221	struct snd_ctl_elem_value *ucontrol)
	222	{
	223	struct soc_mixer_control *mc =
	224	(struct soc_mixer_control *)kcontrol->private_value;
	225	struct tpa6130a2_data *data;
	226	unsigned int reg = mc->reg;
	227	unsigned int shift = mc->shift;
bd843edf PU	228	int max = mc->max;
bd843edf PU	229	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	230	unsigned int invert = mc->invert;
	231	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	232	unsigned int val_reg;
	233
773392b2 TI	234	if (WARN_ON(!tpa6130a2_client))
773392b2 TI	235	return -EINVAL;
493b67ef PU	236	data = i2c_get_clientdata(tpa6130a2_client);
	237
	238	if (invert)
bd843edf	239	val = max - val;
493b67ef PU	240
	241	mutex_lock(&data->mutex);
	242
	243	val_reg = tpa6130a2_read(reg);
	244	if (((val_reg >> shift) & mask) == val) {
	245	mutex_unlock(&data->mutex);
	246	return 0;
	247	}
	248
	249	val_reg &= ~(mask << shift);
	250	val_reg \|= val << shift;
	251	tpa6130a2_i2c_write(reg, val_reg);
	252
	253	mutex_unlock(&data->mutex);
	254
	255	return 1;
	256	}
	257
	258	/*
	259	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	260	* down in gain.
	261	*/
	262	static const unsigned int tpa6130_tlv[] = {
	263	TLV_DB_RANGE_HEAD(10),
	264	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	265	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	266	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	267	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	268	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	269	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	270	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	271	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	272	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	273	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	274	};
	275
	276	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	277	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	278	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	279	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	280	tpa6130_tlv),
	281	};
	282
e5e5b31e PU	283	static const unsigned int tpa6140_tlv[] = {
	284	TLV_DB_RANGE_HEAD(3),
	285	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	286	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	287	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	288	};
	289
	290	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	291	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	292	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	293	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	294	tpa6140_tlv),
e5e5b31e PU	295	};
e5e5b31e PU	296
493b67ef PU	297	/*
	298	* Enable or disable channel (left or right)
	299	* The bit number for mute and amplifier are the same per channel:
	300	* bit 6: Right channel
	301	* bit 7: Left channel
	302	* in both registers.
	303	*/
	304	static void tpa6130a2_channel_enable(u8 channel, int enable)
	305	{
493b67ef PU	306	u8 val;
493b67ef PU	307
493b67ef PU	308	if (enable) {
	309	/* Enable channel */
	310	/* Enable amplifier */
	311	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	312	val \|= channel;
d534bacd	313	val &= ~TPA6130A2_SWS;
493b67ef PU	314	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	315
	316	/* Unmute channel */
	317	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	318	val &= ~channel;
	319	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	320	} else {
	321	/* Disable channel */
	322	/* Mute channel */
	323	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	324	val \|= channel;
	325	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	326
	327	/* Disable amplifier */
	328	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	329	val &= ~channel;
	330	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	331	}
	332	}
	333
39646871	334	int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
493b67ef	335	{
7c4e6492	336	int ret = 0;
39646871	337	if (enable) {
7c4e6492	338	ret = tpa6130a2_power(1);
39646871 PU	339	if (ret < 0)
	340	return ret;
	341	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	342	1);
	343	} else {
	344	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	345	0);
7c4e6492	346	ret = tpa6130a2_power(0);
493b67ef	347	}
39646871	348
7c4e6492	349	return ret;
493b67ef	350	}
39646871	351	EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
493b67ef PU	352
	353	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	354	{
e5e5b31e PU	355	struct tpa6130a2_data *data;
e5e5b31e PU	356
872a64d7 PU	357	if (tpa6130a2_client == NULL)
	358	return -ENODEV;
	359
e5e5b31e PU	360	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	361
e5e5b31e	362	if (data->id == TPA6140A2)
022658be	363	return snd_soc_add_codec_controls(codec, tpa6140a2_controls,
e5e5b31e PU	364	ARRAY_SIZE(tpa6140a2_controls));
e5e5b31e PU	365	else
022658be	366	return snd_soc_add_codec_controls(codec, tpa6130a2_controls,
e5e5b31e	367	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	368	}
	369	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	370
7a79e94e BP	371	static int tpa6130a2_probe(struct i2c_client *client,
7a79e94e BP	372	const struct i2c_device_id *id)
493b67ef PU	373	{
	374	struct device *dev;
	375	struct tpa6130a2_data *data;
f95a4883 SR	376	struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
f95a4883 SR	377	struct device_node *np = client->dev.of_node;
ad8332c1 JN	378	const char *regulator;
ad8332c1 JN	379	int ret;
493b67ef PU	380
	381	dev = &client->dev;
	382
6945e9f9	383	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
493b67ef PU	384	if (data == NULL) {
	385	dev_err(dev, "Can not allocate memory\n");
	386	return -ENOMEM;
	387	}
	388
f95a4883 SR	389	if (pdata) {
	390	data->power_gpio = pdata->power_gpio;
	391	} else if (np) {
	392	data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
	393	} else {
	394	dev_err(dev, "Platform data not set\n");
	395	dump_stack();
	396	return -ENODEV;
	397	}
	398
493b67ef PU	399	tpa6130a2_client = client;
	400
	401	i2c_set_clientdata(tpa6130a2_client, data);
	402
07441006	403	data->id = id->driver_data;
493b67ef PU	404
	405	mutex_init(&data->mutex);
	406
	407	/* Set default register values */
	408	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	409	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	410	TPA6130A2_MUTE_L;
	411
	412	if (data->power_gpio >= 0) {
d06080cf SK	413	ret = devm_gpio_request(dev, data->power_gpio,
d06080cf SK	414	"tpa6130a2 enable");
493b67ef PU	415	if (ret < 0) {
	416	dev_err(dev, "Failed to request power GPIO (%d)\n",
	417	data->power_gpio);
7c4e6492	418	goto err_gpio;
493b67ef PU	419	}
493b67ef PU	420	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	421	}
493b67ef PU	422
e5e5b31e	423	switch (data->id) {
ad8332c1 JN	424	default:
ad8332c1 JN	425	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
07441006	426	data->id);
2138301e	427	case TPA6130A2:
ad8332c1	428	regulator = "Vdd";
2138301e IK	429	break;
2138301e IK	430	case TPA6140A2:
ad8332c1	431	regulator = "AVdd";
2138301e	432	break;
2138301e	433	}
7c4e6492	434
d06080cf	435	data->supply = devm_regulator_get(dev, regulator);
ad8332c1 JN	436	if (IS_ERR(data->supply)) {
	437	ret = PTR_ERR(data->supply);
	438	dev_err(dev, "Failed to request supply: %d\n", ret);
d06080cf	439	goto err_gpio;
7c4e6492 IK	440	}
	441
	442	ret = tpa6130a2_power(1);
	443	if (ret != 0)
d06080cf	444	goto err_gpio;
7c4e6492	445
493b67ef PU	446
	447	/* Read version */
	448	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	449	TPA6130A2_VERSION_MASK;
	450	if ((ret != 1) && (ret != 2))
	451	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	452
	453	/* Disable the chip */
7c4e6492 IK	454	ret = tpa6130a2_power(0);
7c4e6492 IK	455	if (ret != 0)
d06080cf	456	goto err_gpio;
493b67ef PU	457
493b67ef PU	458	return 0;
7c4e6492	459
7c4e6492	460	err_gpio:
ebab1b1d	461	tpa6130a2_client = NULL;
493b67ef PU	462
	463	return ret;
	464	}
	465
7a79e94e	466	static int tpa6130a2_remove(struct i2c_client *client)
493b67ef	467	{
493b67ef	468	tpa6130a2_power(0);
ebab1b1d	469	tpa6130a2_client = NULL;
493b67ef PU	470
	471	return 0;
	472	}
	473
	474	static const struct i2c_device_id tpa6130a2_id[] = {
07441006 PU	475	{ "tpa6130a2", TPA6130A2 },
07441006 PU	476	{ "tpa6140a2", TPA6140A2 },
493b67ef PU	477	{ }
	478	};
	479	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	480
f95a4883 SR	481	#if IS_ENABLED(CONFIG_OF)
	482	static const struct of_device_id tpa6130a2_of_match[] = {
	483	{ .compatible = "ti,tpa6130a2", },
	484	{ .compatible = "ti,tpa6140a2" },
	485	{},
	486	};
	487	MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
	488	#endif
	489
493b67ef PU	490	static struct i2c_driver tpa6130a2_i2c_driver = {
	491	.driver = {
	492	.name = "tpa6130a2",
	493	.owner = THIS_MODULE,
f95a4883	494	.of_match_table = of_match_ptr(tpa6130a2_of_match),
493b67ef PU	495	},
493b67ef PU	496	.probe = tpa6130a2_probe,
7a79e94e	497	.remove = tpa6130a2_remove,
493b67ef PU	498	.id_table = tpa6130a2_id,
	499	};
	500
f062e2b6	501	module_i2c_driver(tpa6130a2_i2c_driver);
493b67ef	502
b4079ef4	503	MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
493b67ef PU	504	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
493b67ef PU	505	MODULE_LICENSE("GPL");