[deliverable/linux.git] / sound / soc / codecs / tpa6130a2.c

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

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/regulator/consumer.h>
#include <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",
};

static const char *tpa6140a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
	"HPVdd",
	"AVdd",
};

/* 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 __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;
	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);
	}

	switch (pdata->id) {
	case TPA6130A2:
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
			data->supplies[i].supply = tpa6130a2_supply_names[i];
		break;
	case TPA6140A2:
		for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
			data->supplies[i].supply = tpa6140a2_supply_names[i];;
		break;
	default:
		dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
			 pdata->id);
		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 __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_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
2138301e IK	44	static const char *tpa6140a2_supply_names[TPA6130A2_NUM_SUPPLIES] = {
	45	"HPVdd",
	46	"AVdd",
	47	};
	48
493b67ef PU	49	/* This struct is used to save the context */
	50	struct tpa6130a2_data {
	51	struct mutex mutex;
	52	unsigned char regs[TPA6130A2_CACHEREGNUM];
7c4e6492	53	struct regulator_bulk_data supplies[TPA6130A2_NUM_SUPPLIES];
493b67ef PU	54	int power_gpio;
	55	unsigned char power_state;
	56	};
	57
	58	static int tpa6130a2_i2c_read(int reg)
	59	{
	60	struct tpa6130a2_data *data;
	61	int val;
	62
	63	BUG_ON(tpa6130a2_client == NULL);
	64	data = i2c_get_clientdata(tpa6130a2_client);
	65
	66	/* If powered off, return the cached value */
	67	if (data->power_state) {
	68	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	69	if (val < 0)
	70	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	71	else
	72	data->regs[reg] = val;
	73	} else {
	74	val = data->regs[reg];
	75	}
	76
	77	return val;
	78	}
	79
	80	static int tpa6130a2_i2c_write(int reg, u8 value)
	81	{
	82	struct tpa6130a2_data *data;
	83	int val = 0;
	84
	85	BUG_ON(tpa6130a2_client == NULL);
	86	data = i2c_get_clientdata(tpa6130a2_client);
	87
	88	if (data->power_state) {
	89	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
	90	if (val < 0)
	91	dev_err(&tpa6130a2_client->dev, "Write failed\n");
	92	}
	93
	94	/* Either powered on or off, we save the context */
	95	data->regs[reg] = value;
	96
	97	return val;
	98	}
	99
	100	static u8 tpa6130a2_read(int reg)
	101	{
	102	struct tpa6130a2_data *data;
	103
	104	BUG_ON(tpa6130a2_client == NULL);
	105	data = i2c_get_clientdata(tpa6130a2_client);
	106
	107	return data->regs[reg];
	108	}
	109
	110	static void tpa6130a2_initialize(void)
	111	{
	112	struct tpa6130a2_data *data;
	113	int i;
	114
	115	BUG_ON(tpa6130a2_client == NULL);
	116	data = i2c_get_clientdata(tpa6130a2_client);
	117
118	for (i = 1; i < TPA6130A2_REG_VERSION; i++)
119	tpa6130a2_i2c_write(i, data->regs[i]);
120	}
121
7c4e6492	122	static int tpa6130a2_power(int power)
493b67ef PU	123	{
	124	struct tpa6130a2_data *data;
	125	u8 val;
7c4e6492	126	int ret;
493b67ef PU	127
	128	BUG_ON(tpa6130a2_client == NULL);
	129	data = i2c_get_clientdata(tpa6130a2_client);
	130
	131	mutex_lock(&data->mutex);
	132	if (power) {
	133	/* Power on */
7c4e6492	134	if (data->power_gpio >= 0)
493b67ef	135	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	136
	137	ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies),
	138	data->supplies);
	139	if (ret != 0) {
	140	dev_err(&tpa6130a2_client->dev,
	141	"Failed to enable supplies: %d\n", ret);
	142	goto exit;
493b67ef	143	}
7c4e6492 IK	144
	145	data->power_state = 1;
	146	tpa6130a2_initialize();
	147
493b67ef PU	148	/* Clear SWS */
	149	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	150	val &= ~TPA6130A2_SWS;
	151	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	152	} else {
	153	/* set SWS */
	154	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	155	val \|= TPA6130A2_SWS;
	156	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	157
493b67ef	158	/* Power off */
7c4e6492	159	if (data->power_gpio >= 0)
493b67ef	160	gpio_set_value(data->power_gpio, 0);
7c4e6492 IK	161
	162	ret = regulator_bulk_disable(ARRAY_SIZE(data->supplies),
	163	data->supplies);
	164	if (ret != 0) {
	165	dev_err(&tpa6130a2_client->dev,
	166	"Failed to disable supplies: %d\n", ret);
	167	goto exit;
493b67ef	168	}
7c4e6492 IK	169
7c4e6492 IK	170	data->power_state = 0;
493b67ef	171	}
7c4e6492 IK	172
7c4e6492 IK	173	exit:
493b67ef	174	mutex_unlock(&data->mutex);
7c4e6492	175	return ret;
493b67ef PU	176	}
	177
	178	static int tpa6130a2_get_reg(struct snd_kcontrol *kcontrol,
	179	struct snd_ctl_elem_value *ucontrol)
	180	{
	181	struct soc_mixer_control *mc =
	182	(struct soc_mixer_control *)kcontrol->private_value;
	183	struct tpa6130a2_data *data;
	184	unsigned int reg = mc->reg;
	185	unsigned int shift = mc->shift;
	186	unsigned int mask = mc->max;
	187	unsigned int invert = mc->invert;
	188
	189	BUG_ON(tpa6130a2_client == NULL);
	190	data = i2c_get_clientdata(tpa6130a2_client);
	191
	192	mutex_lock(&data->mutex);
	193
	194	ucontrol->value.integer.value[0] =
	195	(tpa6130a2_read(reg) >> shift) & mask;
	196
	197	if (invert)
	198	ucontrol->value.integer.value[0] =
	199	mask - ucontrol->value.integer.value[0];
	200
	201	mutex_unlock(&data->mutex);
	202	return 0;
	203	}
	204
	205	static int tpa6130a2_set_reg(struct snd_kcontrol *kcontrol,
	206	struct snd_ctl_elem_value *ucontrol)
	207	{
	208	struct soc_mixer_control *mc =
	209	(struct soc_mixer_control *)kcontrol->private_value;
	210	struct tpa6130a2_data *data;
	211	unsigned int reg = mc->reg;
	212	unsigned int shift = mc->shift;
	213	unsigned int mask = mc->max;
	214	unsigned int invert = mc->invert;
	215	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	216	unsigned int val_reg;
	217
	218	BUG_ON(tpa6130a2_client == NULL);
	219	data = i2c_get_clientdata(tpa6130a2_client);
	220
	221	if (invert)
	222	val = mask - val;
	223
	224	mutex_lock(&data->mutex);
	225
	226	val_reg = tpa6130a2_read(reg);
	227	if (((val_reg >> shift) & mask) == val) {
	228	mutex_unlock(&data->mutex);
	229	return 0;
	230	}
	231
	232	val_reg &= ~(mask << shift);
	233	val_reg \|= val << shift;
	234	tpa6130a2_i2c_write(reg, val_reg);
	235
	236	mutex_unlock(&data->mutex);
	237
	238	return 1;
	239	}
240
241	/*
242	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
243	* down in gain.
244	*/
245	static const unsigned int tpa6130_tlv[] = {
246	TLV_DB_RANGE_HEAD(10),
247	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
248	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
249	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
250	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
251	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
252	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
253	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
254	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
255	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
256	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
257	};
258
259	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
260	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
261	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
262	tpa6130a2_get_reg, tpa6130a2_set_reg,
263	tpa6130_tlv),
264	};
265
266	/*
267	* Enable or disable channel (left or right)
268	* The bit number for mute and amplifier are the same per channel:
269	* bit 6: Right channel
270	* bit 7: Left channel
271	* in both registers.
272	*/
273	static void tpa6130a2_channel_enable(u8 channel, int enable)
274	{
493b67ef PU	275	u8 val;
493b67ef PU	276
493b67ef PU	277	if (enable) {
	278	/* Enable channel */
	279	/* Enable amplifier */
	280	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	281	val \|= channel;
	282	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	283
	284	/* Unmute channel */
	285	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	286	val &= ~channel;
	287	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	288	} else {
	289	/* Disable channel */
	290	/* Mute channel */
	291	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	292	val \|= channel;
	293	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	294
	295	/* Disable amplifier */
	296	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	297	val &= ~channel;
	298	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	299	}
	300	}
	301
	302	static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
	303	struct snd_kcontrol *kcontrol, int event)
	304	{
	305	switch (event) {
	306	case SND_SOC_DAPM_POST_PMU:
	307	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
	308	break;
	309	case SND_SOC_DAPM_POST_PMD:
	310	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
	311	break;
	312	}
	313	return 0;
	314	}
	315
	316	static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
	317	struct snd_kcontrol *kcontrol, int event)
	318	{
	319	switch (event) {
	320	case SND_SOC_DAPM_POST_PMU:
	321	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
	322	break;
	323	case SND_SOC_DAPM_POST_PMD:
	324	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
	325	break;
	326	}
	327	return 0;
	328	}
	329
	330	static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
	331	struct snd_kcontrol *kcontrol, int event)
	332	{
7c4e6492 IK	333	int ret = 0;
7c4e6492 IK	334
493b67ef PU	335	switch (event) {
493b67ef PU	336	case SND_SOC_DAPM_POST_PMU:
7c4e6492	337	ret = tpa6130a2_power(1);
493b67ef PU	338	break;
493b67ef PU	339	case SND_SOC_DAPM_POST_PMD:
7c4e6492	340	ret = tpa6130a2_power(0);
493b67ef PU	341	break;
493b67ef PU	342	}
7c4e6492	343	return ret;
493b67ef PU	344	}
	345
	346	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	347	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
	348	0, 0, NULL, 0, tpa6130a2_left_event,
	349	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	350	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
	351	0, 0, NULL, 0, tpa6130a2_right_event,
	352	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	353	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
	354	0, 0, tpa6130a2_supply_event,
	355	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	356	/* Outputs */
	357	SND_SOC_DAPM_HP("TPA6130A2 Headphone Left", NULL),
	358	SND_SOC_DAPM_HP("TPA6130A2 Headphone Right", NULL),
	359	};
	360
	361	static const struct snd_soc_dapm_route audio_map[] = {
	362	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	363	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},
	364
	365	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	366	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
	367	};
	368
	369	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	370	{
	371	snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets,
	372	ARRAY_SIZE(tpa6130a2_dapm_widgets));
	373
	374	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
	375
	376	return snd_soc_add_controls(codec, tpa6130a2_controls,
	377	ARRAY_SIZE(tpa6130a2_controls));
	378
	379	}
	380	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	381
735fe4cf MB	382	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	383	const struct i2c_device_id *id)
493b67ef PU	384	{
	385	struct device *dev;
	386	struct tpa6130a2_data *data;
	387	struct tpa6130a2_platform_data *pdata;
7c4e6492	388	int i, ret;
493b67ef PU	389
	390	dev = &client->dev;
	391
	392	if (client->dev.platform_data == NULL) {
	393	dev_err(dev, "Platform data not set\n");
	394	dump_stack();
	395	return -ENODEV;
	396	}
	397
	398	data = kzalloc(sizeof(*data), GFP_KERNEL);
	399	if (data == NULL) {
	400	dev_err(dev, "Can not allocate memory\n");
	401	return -ENOMEM;
	402	}
	403
	404	tpa6130a2_client = client;
	405
	406	i2c_set_clientdata(tpa6130a2_client, data);
	407
ebab1b1d	408	pdata = client->dev.platform_data;
493b67ef PU	409	data->power_gpio = pdata->power_gpio;
	410
	411	mutex_init(&data->mutex);
	412
	413	/* Set default register values */
	414	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	415	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	416	TPA6130A2_MUTE_L;
	417
	418	if (data->power_gpio >= 0) {
	419	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	420	if (ret < 0) {
	421	dev_err(dev, "Failed to request power GPIO (%d)\n",
	422	data->power_gpio);
7c4e6492	423	goto err_gpio;
493b67ef PU	424	}
493b67ef PU	425	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	426	}
493b67ef PU	427
2138301e IK	428	switch (pdata->id) {
	429	case TPA6130A2:
	430	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	431	data->supplies[i].supply = tpa6130a2_supply_names[i];
	432	break;
	433	case TPA6140A2:
	434	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	435	data->supplies[i].supply = tpa6140a2_supply_names[i];;
	436	break;
	437	default:
	438	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	439	pdata->id);
	440	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	441	data->supplies[i].supply = tpa6130a2_supply_names[i];
	442	}
7c4e6492 IK	443
	444	ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
	445	data->supplies);
	446	if (ret != 0) {
	447	dev_err(dev, "Failed to request supplies: %d\n", ret);
	448	goto err_regulator;
	449	}
	450
	451	ret = tpa6130a2_power(1);
	452	if (ret != 0)
	453	goto err_power;
	454
493b67ef PU	455
	456	/* Read version */
	457	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	458	TPA6130A2_VERSION_MASK;
	459	if ((ret != 1) && (ret != 2))
	460	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	461
	462	/* Disable the chip */
7c4e6492 IK	463	ret = tpa6130a2_power(0);
	464	if (ret != 0)
	465	goto err_power;
493b67ef PU	466
493b67ef PU	467	return 0;
7c4e6492 IK	468
	469	err_power:
	470	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
	471	err_regulator:
	472	if (data->power_gpio >= 0)
	473	gpio_free(data->power_gpio);
	474	err_gpio:
493b67ef PU	475	kfree(data);
493b67ef PU	476	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	477	tpa6130a2_client = NULL;
493b67ef PU	478
	479	return ret;
	480	}
	481
735fe4cf	482	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	483	{
	484	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	485
	486	tpa6130a2_power(0);
	487
	488	if (data->power_gpio >= 0)
	489	gpio_free(data->power_gpio);
7c4e6492 IK	490
	491	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
	492
493b67ef	493	kfree(data);
ebab1b1d	494	tpa6130a2_client = NULL;
493b67ef PU	495
	496	return 0;
	497	}
	498
	499	static const struct i2c_device_id tpa6130a2_id[] = {
	500	{ "tpa6130a2", 0 },
	501	{ }
	502	};
	503	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	504
	505	static struct i2c_driver tpa6130a2_i2c_driver = {
	506	.driver = {
	507	.name = "tpa6130a2",
	508	.owner = THIS_MODULE,
	509	},
	510	.probe = tpa6130a2_probe,
	511	.remove = __devexit_p(tpa6130a2_remove),
	512	.id_table = tpa6130a2_id,
	513	};
	514
	515	static int __init tpa6130a2_init(void)
	516	{
	517	return i2c_add_driver(&tpa6130a2_i2c_driver);
	518	}
	519
	520	static void __exit tpa6130a2_exit(void)
	521	{
	522	i2c_del_driver(&tpa6130a2_i2c_driver);
	523	}
	524
	525	MODULE_AUTHOR("Peter Ujfalusi");
	526	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	527	MODULE_LICENSE("GPL");
	528
	529	module_init(tpa6130a2_init);
	530	module_exit(tpa6130a2_exit);