[mirror_ubuntu-hirsute-kernel.git] / sound / soc / codecs / tpa6130a2.c

/*
 * ALSA SoC Texas Instruments TPA6130A2 headset stereo amplifier driver
 *
 * Copyright (C) Nokia Corporation
 *
 * Author: Peter Ujfalusi <peter.ujfalusi@nokia.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

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

#include "tpa6130a2.h"

static struct i2c_client *tpa6130a2_client;

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

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

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

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

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

	return val;
}

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

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

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

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

	return val;
}

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

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

	return data->regs[reg];
}

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

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

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

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

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

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

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

		data->power_state = 1;
		tpa6130a2_initialize();

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

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

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

		data->power_state = 0;
	}

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

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

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

	mutex_lock(&data->mutex);

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

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

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

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

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

	if (invert)
		val = mask - val;

	mutex_lock(&data->mutex);

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

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

	mutex_unlock(&data->mutex);

	return 1;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

int tpa6130a2_add_controls(struct snd_soc_codec *codec)
{
	snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets,
				ARRAY_SIZE(tpa6130a2_dapm_widgets));

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

	return snd_soc_add_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;
	int i, ret;

	dev = &client->dev;

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

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

	tpa6130a2_client = client;

	i2c_set_clientdata(tpa6130a2_client, data);

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

	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);
	}

	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
		data->supplies[i].supply = tpa6130a2_supply_names[i];

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

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


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

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

	return 0;

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

	return ret;
}

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

	tpa6130a2_power(0);

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

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

	kfree(data);
	tpa6130a2_client = NULL;

	return 0;
}

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

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

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

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

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

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