[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 DECLARE_TLV_DB_RANGE(tpa6130_tlv,
	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 DECLARE_TLV_DB_RANGE(tpa6140_tlv,
	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)
		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",
		.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	*/
4e0e5f80	262	static const DECLARE_TLV_DB_RANGE(tpa6130_tlv,
493b67ef PU	263	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	264	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	265	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	266	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	267	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	268	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	269	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	270	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	271	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
4e0e5f80 LPC	272	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0)
4e0e5f80 LPC	273	);
493b67ef PU	274
	275	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	276	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	277	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	278	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	279	tpa6130_tlv),
	280	};
	281
4e0e5f80	282	static const DECLARE_TLV_DB_RANGE(tpa6140_tlv,
e5e5b31e PU	283	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
e5e5b31e PU	284	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
4e0e5f80 LPC	285	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0)
4e0e5f80 LPC	286	);
e5e5b31e PU	287
e5e5b31e PU	288	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	289	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	290	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	291	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	292	tpa6140_tlv),
e5e5b31e PU	293	};
e5e5b31e PU	294
493b67ef PU	295	/*
	296	* Enable or disable channel (left or right)
	297	* The bit number for mute and amplifier are the same per channel:
	298	* bit 6: Right channel
	299	* bit 7: Left channel
	300	* in both registers.
	301	*/
	302	static void tpa6130a2_channel_enable(u8 channel, int enable)
	303	{
493b67ef PU	304	u8 val;
493b67ef PU	305
493b67ef PU	306	if (enable) {
	307	/* Enable channel */
	308	/* Enable amplifier */
	309	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	310	val \|= channel;
d534bacd	311	val &= ~TPA6130A2_SWS;
493b67ef PU	312	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	313
	314	/* Unmute channel */
	315	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	316	val &= ~channel;
	317	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	318	} else {
	319	/* Disable channel */
	320	/* Mute channel */
	321	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	322	val \|= channel;
	323	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	324
	325	/* Disable amplifier */
	326	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	327	val &= ~channel;
	328	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	329	}
	330	}
	331
39646871	332	int tpa6130a2_stereo_enable(struct snd_soc_codec *codec, int enable)
493b67ef	333	{
7c4e6492	334	int ret = 0;
39646871	335	if (enable) {
7c4e6492	336	ret = tpa6130a2_power(1);
39646871 PU	337	if (ret < 0)
	338	return ret;
	339	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	340	1);
	341	} else {
	342	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R \| TPA6130A2_HP_EN_L,
	343	0);
7c4e6492	344	ret = tpa6130a2_power(0);
493b67ef	345	}
39646871	346
7c4e6492	347	return ret;
493b67ef	348	}
39646871	349	EXPORT_SYMBOL_GPL(tpa6130a2_stereo_enable);
493b67ef PU	350
	351	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	352	{
e5e5b31e PU	353	struct tpa6130a2_data *data;
e5e5b31e PU	354
872a64d7 PU	355	if (tpa6130a2_client == NULL)
	356	return -ENODEV;
	357
e5e5b31e PU	358	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	359
e5e5b31e	360	if (data->id == TPA6140A2)
022658be	361	return snd_soc_add_codec_controls(codec, tpa6140a2_controls,
e5e5b31e PU	362	ARRAY_SIZE(tpa6140a2_controls));
e5e5b31e PU	363	else
022658be	364	return snd_soc_add_codec_controls(codec, tpa6130a2_controls,
e5e5b31e	365	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	366	}
	367	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	368
7a79e94e BP	369	static int tpa6130a2_probe(struct i2c_client *client,
7a79e94e BP	370	const struct i2c_device_id *id)
493b67ef PU	371	{
	372	struct device *dev;
	373	struct tpa6130a2_data *data;
f95a4883 SR	374	struct tpa6130a2_platform_data *pdata = client->dev.platform_data;
f95a4883 SR	375	struct device_node *np = client->dev.of_node;
ad8332c1 JN	376	const char *regulator;
ad8332c1 JN	377	int ret;
493b67ef PU	378
	379	dev = &client->dev;
	380
6945e9f9	381	data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
656e3435	382	if (!data)
493b67ef	383	return -ENOMEM;
493b67ef	384
f95a4883 SR	385	if (pdata) {
	386	data->power_gpio = pdata->power_gpio;
	387	} else if (np) {
	388	data->power_gpio = of_get_named_gpio(np, "power-gpio", 0);
	389	} else {
	390	dev_err(dev, "Platform data not set\n");
	391	dump_stack();
	392	return -ENODEV;
	393	}
	394
493b67ef PU	395	tpa6130a2_client = client;
	396
	397	i2c_set_clientdata(tpa6130a2_client, data);
	398
07441006	399	data->id = id->driver_data;
493b67ef PU	400
	401	mutex_init(&data->mutex);
	402
	403	/* Set default register values */
	404	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	405	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	406	TPA6130A2_MUTE_L;
	407
	408	if (data->power_gpio >= 0) {
d06080cf SK	409	ret = devm_gpio_request(dev, data->power_gpio,
d06080cf SK	410	"tpa6130a2 enable");
493b67ef PU	411	if (ret < 0) {
	412	dev_err(dev, "Failed to request power GPIO (%d)\n",
	413	data->power_gpio);
7c4e6492	414	goto err_gpio;
493b67ef PU	415	}
493b67ef PU	416	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	417	}
493b67ef PU	418
e5e5b31e	419	switch (data->id) {
ad8332c1 JN	420	default:
ad8332c1 JN	421	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
07441006	422	data->id);
2138301e	423	case TPA6130A2:
ad8332c1	424	regulator = "Vdd";
2138301e IK	425	break;
2138301e IK	426	case TPA6140A2:
ad8332c1	427	regulator = "AVdd";
2138301e	428	break;
2138301e	429	}
7c4e6492	430
d06080cf	431	data->supply = devm_regulator_get(dev, regulator);
ad8332c1 JN	432	if (IS_ERR(data->supply)) {
	433	ret = PTR_ERR(data->supply);
	434	dev_err(dev, "Failed to request supply: %d\n", ret);
d06080cf	435	goto err_gpio;
7c4e6492 IK	436	}
	437
	438	ret = tpa6130a2_power(1);
	439	if (ret != 0)
d06080cf	440	goto err_gpio;
7c4e6492	441
493b67ef PU	442
	443	/* Read version */
	444	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	445	TPA6130A2_VERSION_MASK;
	446	if ((ret != 1) && (ret != 2))
	447	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	448
	449	/* Disable the chip */
7c4e6492 IK	450	ret = tpa6130a2_power(0);
7c4e6492 IK	451	if (ret != 0)
d06080cf	452	goto err_gpio;
493b67ef PU	453
493b67ef PU	454	return 0;
7c4e6492	455
7c4e6492	456	err_gpio:
ebab1b1d	457	tpa6130a2_client = NULL;
493b67ef PU	458
	459	return ret;
	460	}
	461
7a79e94e	462	static int tpa6130a2_remove(struct i2c_client *client)
493b67ef	463	{
493b67ef	464	tpa6130a2_power(0);
ebab1b1d	465	tpa6130a2_client = NULL;
493b67ef PU	466
	467	return 0;
	468	}
	469
	470	static const struct i2c_device_id tpa6130a2_id[] = {
07441006 PU	471	{ "tpa6130a2", TPA6130A2 },
07441006 PU	472	{ "tpa6140a2", TPA6140A2 },
493b67ef PU	473	{ }
	474	};
	475	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	476
f95a4883 SR	477	#if IS_ENABLED(CONFIG_OF)
	478	static const struct of_device_id tpa6130a2_of_match[] = {
	479	{ .compatible = "ti,tpa6130a2", },
	480	{ .compatible = "ti,tpa6140a2" },
	481	{},
	482	};
	483	MODULE_DEVICE_TABLE(of, tpa6130a2_of_match);
	484	#endif
	485
493b67ef PU	486	static struct i2c_driver tpa6130a2_i2c_driver = {
	487	.driver = {
	488	.name = "tpa6130a2",
f95a4883	489	.of_match_table = of_match_ptr(tpa6130a2_of_match),
493b67ef PU	490	},
493b67ef PU	491	.probe = tpa6130a2_probe,
7a79e94e	492	.remove = tpa6130a2_remove,
493b67ef PU	493	.id_table = tpa6130a2_id,
	494	};
	495
f062e2b6	496	module_i2c_driver(tpa6130a2_i2c_driver);
493b67ef	497
b4079ef4	498	MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
493b67ef PU	499	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
493b67ef PU	500	MODULE_LICENSE("GPL");