[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 <linux/slab.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;

/* 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;
	unsigned char power_state;
	enum tpa_model id;
};

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

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

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

	return val;
}

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

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

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

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

	return val;
}

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

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

	return data->regs[reg];
}

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

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

	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
		ret = tpa6130a2_i2c_write(i, data->regs[i]);
		if (ret < 0)
			break;
	}

	return ret;
}

static int tpa6130a2_power(int power)
{
	struct	tpa6130a2_data *data;
	u8	val;
	int	ret = 0;

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

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

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

		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;
		}

		/* Clear SWS */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val &= ~TPA6130A2_SWS;
		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	} else if (!power && data->power_state) {
		/* set SWS */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val |= TPA6130A2_SWS;
		tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);

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

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

		data->power_state = 0;
	}

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

static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct tpa6130a2_data *data;
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	int max = mc->max;
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;

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

	mutex_lock(&data->mutex);

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

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

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

static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
		struct snd_ctl_elem_value *ucontrol)
{
	struct soc_mixer_control *mc =
		(struct soc_mixer_control *)kcontrol->private_value;
	struct tpa6130a2_data *data;
	unsigned int reg = mc->reg;
	unsigned int shift = mc->shift;
	int max = mc->max;
	unsigned int mask = (1 << fls(max)) - 1;
	unsigned int invert = mc->invert;
	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	unsigned int val_reg;

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

	if (invert)
		val = max - val;

	mutex_lock(&data->mutex);

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

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

	mutex_unlock(&data->mutex);

	return 1;
}

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

static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
		       TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
		       tpa6130a2_get_volsw, tpa6130a2_put_volsw,
		       tpa6130_tlv),
};

static const unsigned int tpa6140_tlv[] = {
	TLV_DB_RANGE_HEAD(3),
	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
};

static const struct snd_kcontrol_new tpa6140a2_controls[] = {
	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
		       TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
		       tpa6130a2_get_volsw, tpa6130a2_put_volsw,
		       tpa6140_tlv),
};

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

	if (enable) {
		/* Enable channel */
		/* Enable amplifier */
		val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
		val |= channel;
		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_OUTPUT("TPA6130A2 Headphone Left"),
	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"),
};

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)
{
	struct	tpa6130a2_data *data;
	struct snd_soc_dapm_context *dapm = &codec->dapm;

	if (tpa6130a2_client == NULL)
		return -ENODEV;

	data = i2c_get_clientdata(tpa6130a2_client);

	snd_soc_dapm_new_controls(dapm, tpa6130a2_dapm_widgets,
				ARRAY_SIZE(tpa6130a2_dapm_widgets));

	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));

	if (data->id == TPA6140A2)
		return snd_soc_add_controls(codec, tpa6140a2_controls,
						ARRAY_SIZE(tpa6140a2_controls));
	else
		return snd_soc_add_controls(codec, tpa6130a2_controls,
						ARRAY_SIZE(tpa6130a2_controls));

}
EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);

static int __devinit tpa6130a2_probe(struct i2c_client *client,
				     const struct i2c_device_id *id)
{
	struct device *dev;
	struct tpa6130a2_data *data;
	struct tpa6130a2_platform_data *pdata;
	const char *regulator;
	int ret;

	dev = &client->dev;

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

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

	tpa6130a2_client = client;

	i2c_set_clientdata(tpa6130a2_client, data);

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

	mutex_init(&data->mutex);

	/* Set default register values */
	data->regs[TPA6130A2_REG_CONTROL] =	TPA6130A2_SWS;
	data->regs[TPA6130A2_REG_VOL_MUTE] =	TPA6130A2_MUTE_R |
						TPA6130A2_MUTE_L;

	if (data->power_gpio >= 0) {
		ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
		if (ret < 0) {
			dev_err(dev, "Failed to request power GPIO (%d)\n",
				data->power_gpio);
			goto err_gpio;
		}
		gpio_direction_output(data->power_gpio, 0);
	}

	switch (data->id) {
	default:
		dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
			 pdata->id);
	case TPA6130A2:
		regulator = "Vdd";
		break;
	case TPA6140A2:
		regulator = "AVdd";
		break;
	}

	data->supply = regulator_get(dev, regulator);
	if (IS_ERR(data->supply)) {
		ret = PTR_ERR(data->supply);
		dev_err(dev, "Failed to request supply: %d\n", ret);
		goto err_regulator;
	}

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


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

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

	return 0;

err_power:
	regulator_put(data->supply);
err_regulator:
	if (data->power_gpio >= 0)
		gpio_free(data->power_gpio);
err_gpio:
	kfree(data);
	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_put(data->supply);

	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>
5a0e3ad6	29	#include <linux/slab.h>
493b67ef PU	30	#include <sound/tpa6130a2-plat.h>
	31	#include <sound/soc.h>
	32	#include <sound/soc-dapm.h>
	33	#include <sound/tlv.h>
	34
	35	#include "tpa6130a2.h"
	36
ebab1b1d	37	static struct i2c_client *tpa6130a2_client;
493b67ef PU	38
	39	/* This struct is used to save the context */
	40	struct tpa6130a2_data {
	41	struct mutex mutex;
	42	unsigned char regs[TPA6130A2_CACHEREGNUM];
ad8332c1	43	struct regulator *supply;
493b67ef PU	44	int power_gpio;
493b67ef PU	45	unsigned char power_state;
e5e5b31e	46	enum tpa_model id;
493b67ef PU	47	};
	48
	49	static int tpa6130a2_i2c_read(int reg)
	50	{
	51	struct tpa6130a2_data *data;
	52	int val;
	53
	54	BUG_ON(tpa6130a2_client == NULL);
	55	data = i2c_get_clientdata(tpa6130a2_client);
	56
	57	/* If powered off, return the cached value */
	58	if (data->power_state) {
	59	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	60	if (val < 0)
	61	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	62	else
	63	data->regs[reg] = val;
	64	} else {
	65	val = data->regs[reg];
	66	}
	67
	68	return val;
	69	}
	70
	71	static int tpa6130a2_i2c_write(int reg, u8 value)
	72	{
	73	struct tpa6130a2_data *data;
	74	int val = 0;
	75
	76	BUG_ON(tpa6130a2_client == NULL);
	77	data = i2c_get_clientdata(tpa6130a2_client);
	78
	79	if (data->power_state) {
	80	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
	81	if (val < 0)
	82	dev_err(&tpa6130a2_client->dev, "Write failed\n");
	83	}
	84
	85	/* Either powered on or off, we save the context */
	86	data->regs[reg] = value;
	87
	88	return val;
	89	}
	90
	91	static u8 tpa6130a2_read(int reg)
	92	{
	93	struct tpa6130a2_data *data;
	94
	95	BUG_ON(tpa6130a2_client == NULL);
	96	data = i2c_get_clientdata(tpa6130a2_client);
	97
	98	return data->regs[reg];
	99	}
	100
872a64d7	101	static int tpa6130a2_initialize(void)
493b67ef PU	102	{
493b67ef PU	103	struct tpa6130a2_data *data;
872a64d7	104	int i, ret = 0;
493b67ef PU	105
	106	BUG_ON(tpa6130a2_client == NULL);
	107	data = i2c_get_clientdata(tpa6130a2_client);
	108
872a64d7 PU	109	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
	110	ret = tpa6130a2_i2c_write(i, data->regs[i]);
	111	if (ret < 0)
	112	break;
	113	}
	114
	115	return ret;
493b67ef PU	116	}
493b67ef PU	117
7c4e6492	118	static int tpa6130a2_power(int power)
493b67ef PU	119	{
	120	struct tpa6130a2_data *data;
	121	u8 val;
75e3f313	122	int ret = 0;
493b67ef PU	123
	124	BUG_ON(tpa6130a2_client == NULL);
	125	data = i2c_get_clientdata(tpa6130a2_client);
	126
	127	mutex_lock(&data->mutex);
63f7526f	128	if (power && !data->power_state) {
493b67ef	129	/* Power on */
7c4e6492	130	if (data->power_gpio >= 0)
493b67ef	131	gpio_set_value(data->power_gpio, 1);
7c4e6492	132
ad8332c1	133	ret = regulator_enable(data->supply);
7c4e6492 IK	134	if (ret != 0) {
7c4e6492 IK	135	dev_err(&tpa6130a2_client->dev,
ad8332c1	136	"Failed to enable supply: %d\n", ret);
7c4e6492	137	goto exit;
493b67ef	138	}
7c4e6492 IK	139
7c4e6492 IK	140	data->power_state = 1;
872a64d7 PU	141	ret = tpa6130a2_initialize();
	142	if (ret < 0) {
	143	dev_err(&tpa6130a2_client->dev,
	144	"Failed to initialize chip\n");
	145	if (data->power_gpio >= 0)
	146	gpio_set_value(data->power_gpio, 0);
	147	regulator_disable(data->supply);
	148	data->power_state = 0;
	149	goto exit;
	150	}
7c4e6492	151
493b67ef PU	152	/* Clear SWS */
	153	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	154	val &= ~TPA6130A2_SWS;
	155	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
63f7526f	156	} else if (!power && data->power_state) {
493b67ef PU	157	/* set SWS */
	158	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	159	val \|= TPA6130A2_SWS;
	160	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	161
493b67ef	162	/* Power off */
7c4e6492	163	if (data->power_gpio >= 0)
493b67ef	164	gpio_set_value(data->power_gpio, 0);
7c4e6492	165
ad8332c1	166	ret = regulator_disable(data->supply);
7c4e6492 IK	167	if (ret != 0) {
7c4e6492 IK	168	dev_err(&tpa6130a2_client->dev,
ad8332c1	169	"Failed to disable supply: %d\n", ret);
7c4e6492	170	goto exit;
493b67ef	171	}
7c4e6492 IK	172
7c4e6492 IK	173	data->power_state = 0;
493b67ef	174	}
7c4e6492 IK	175
7c4e6492 IK	176	exit:
493b67ef	177	mutex_unlock(&data->mutex);
7c4e6492	178	return ret;
493b67ef PU	179	}
493b67ef PU	180
bd843edf	181	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	182	struct snd_ctl_elem_value *ucontrol)
	183	{
	184	struct soc_mixer_control *mc =
	185	(struct soc_mixer_control *)kcontrol->private_value;
	186	struct tpa6130a2_data *data;
	187	unsigned int reg = mc->reg;
	188	unsigned int shift = mc->shift;
bd843edf PU	189	int max = mc->max;
bd843edf PU	190	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	191	unsigned int invert = mc->invert;
	192
	193	BUG_ON(tpa6130a2_client == NULL);
	194	data = i2c_get_clientdata(tpa6130a2_client);
	195
	196	mutex_lock(&data->mutex);
	197
	198	ucontrol->value.integer.value[0] =
	199	(tpa6130a2_read(reg) >> shift) & mask;
	200
	201	if (invert)
	202	ucontrol->value.integer.value[0] =
bd843edf	203	max - ucontrol->value.integer.value[0];
493b67ef PU	204
	205	mutex_unlock(&data->mutex);
	206	return 0;
	207	}
	208
bd843edf	209	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	210	struct snd_ctl_elem_value *ucontrol)
	211	{
	212	struct soc_mixer_control *mc =
	213	(struct soc_mixer_control *)kcontrol->private_value;
	214	struct tpa6130a2_data *data;
	215	unsigned int reg = mc->reg;
	216	unsigned int shift = mc->shift;
bd843edf PU	217	int max = mc->max;
bd843edf PU	218	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	219	unsigned int invert = mc->invert;
	220	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	221	unsigned int val_reg;
	222
	223	BUG_ON(tpa6130a2_client == NULL);
	224	data = i2c_get_clientdata(tpa6130a2_client);
	225
	226	if (invert)
bd843edf	227	val = max - val;
493b67ef PU	228
	229	mutex_lock(&data->mutex);
	230
	231	val_reg = tpa6130a2_read(reg);
	232	if (((val_reg >> shift) & mask) == val) {
	233	mutex_unlock(&data->mutex);
	234	return 0;
	235	}
	236
	237	val_reg &= ~(mask << shift);
	238	val_reg \|= val << shift;
	239	tpa6130a2_i2c_write(reg, val_reg);
	240
	241	mutex_unlock(&data->mutex);
	242
	243	return 1;
	244	}
	245
	246	/*
	247	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	248	* down in gain.
	249	*/
	250	static const unsigned int tpa6130_tlv[] = {
	251	TLV_DB_RANGE_HEAD(10),
	252	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	253	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	254	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	255	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	256	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	257	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	258	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	259	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	260	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	261	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	262	};
	263
	264	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	265	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	266	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	267	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	268	tpa6130_tlv),
	269	};
	270
e5e5b31e PU	271	static const unsigned int tpa6140_tlv[] = {
	272	TLV_DB_RANGE_HEAD(3),
	273	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	274	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	275	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	276	};
	277
	278	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	279	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	280	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	281	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	282	tpa6140_tlv),
e5e5b31e PU	283	};
e5e5b31e PU	284
493b67ef PU	285	/*
	286	* Enable or disable channel (left or right)
	287	* The bit number for mute and amplifier are the same per channel:
	288	* bit 6: Right channel
	289	* bit 7: Left channel
	290	* in both registers.
	291	*/
	292	static void tpa6130a2_channel_enable(u8 channel, int enable)
	293	{
493b67ef PU	294	u8 val;
493b67ef PU	295
493b67ef PU	296	if (enable) {
	297	/* Enable channel */
	298	/* Enable amplifier */
	299	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	300	val \|= channel;
	301	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	302
	303	/* Unmute channel */
	304	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	305	val &= ~channel;
	306	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	307	} else {
	308	/* Disable channel */
	309	/* Mute channel */
	310	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	311	val \|= channel;
	312	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	313
	314	/* Disable amplifier */
	315	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	316	val &= ~channel;
	317	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	318	}
	319	}
	320
	321	static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
	322	struct snd_kcontrol *kcontrol, int event)
	323	{
	324	switch (event) {
	325	case SND_SOC_DAPM_POST_PMU:
	326	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
	327	break;
	328	case SND_SOC_DAPM_POST_PMD:
	329	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
	330	break;
	331	}
	332	return 0;
	333	}
	334
	335	static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
	336	struct snd_kcontrol *kcontrol, int event)
	337	{
	338	switch (event) {
	339	case SND_SOC_DAPM_POST_PMU:
	340	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
	341	break;
	342	case SND_SOC_DAPM_POST_PMD:
	343	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
	344	break;
	345	}
	346	return 0;
	347	}
	348
	349	static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
	350	struct snd_kcontrol *kcontrol, int event)
	351	{
7c4e6492 IK	352	int ret = 0;
7c4e6492 IK	353
493b67ef PU	354	switch (event) {
493b67ef PU	355	case SND_SOC_DAPM_POST_PMU:
7c4e6492	356	ret = tpa6130a2_power(1);
493b67ef PU	357	break;
493b67ef PU	358	case SND_SOC_DAPM_POST_PMD:
7c4e6492	359	ret = tpa6130a2_power(0);
493b67ef PU	360	break;
493b67ef PU	361	}
7c4e6492	362	return ret;
493b67ef PU	363	}
	364
	365	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	366	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
	367	0, 0, NULL, 0, tpa6130a2_left_event,
	368	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	369	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
	370	0, 0, NULL, 0, tpa6130a2_right_event,
	371	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	372	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
	373	0, 0, tpa6130a2_supply_event,
	374	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	375	/* Outputs */
266d38c8 JN	376	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"),
266d38c8 JN	377	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"),
493b67ef PU	378	};
	379
	380	static const struct snd_soc_dapm_route audio_map[] = {
	381	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	382	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},
	383
	384	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	385	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
	386	};
	387
	388	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	389	{
e5e5b31e	390	struct tpa6130a2_data *data;
ce6120cc	391	struct snd_soc_dapm_context *dapm = &codec->dapm;
e5e5b31e	392
872a64d7 PU	393	if (tpa6130a2_client == NULL)
	394	return -ENODEV;
	395
e5e5b31e PU	396	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	397
ce6120cc	398	snd_soc_dapm_new_controls(dapm, tpa6130a2_dapm_widgets,
493b67ef PU	399	ARRAY_SIZE(tpa6130a2_dapm_widgets));
493b67ef PU	400
ce6120cc	401	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
493b67ef	402
e5e5b31e PU	403	if (data->id == TPA6140A2)
	404	return snd_soc_add_controls(codec, tpa6140a2_controls,
	405	ARRAY_SIZE(tpa6140a2_controls));
	406	else
	407	return snd_soc_add_controls(codec, tpa6130a2_controls,
	408	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	409
	410	}
	411	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	412
735fe4cf MB	413	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	414	const struct i2c_device_id *id)
493b67ef PU	415	{
	416	struct device *dev;
	417	struct tpa6130a2_data *data;
	418	struct tpa6130a2_platform_data *pdata;
ad8332c1 JN	419	const char *regulator;
ad8332c1 JN	420	int ret;
493b67ef PU	421
	422	dev = &client->dev;
	423
	424	if (client->dev.platform_data == NULL) {
	425	dev_err(dev, "Platform data not set\n");
	426	dump_stack();
	427	return -ENODEV;
	428	}
	429
	430	data = kzalloc(sizeof(*data), GFP_KERNEL);
	431	if (data == NULL) {
	432	dev_err(dev, "Can not allocate memory\n");
	433	return -ENOMEM;
	434	}
	435
	436	tpa6130a2_client = client;
	437
	438	i2c_set_clientdata(tpa6130a2_client, data);
	439
ebab1b1d	440	pdata = client->dev.platform_data;
493b67ef	441	data->power_gpio = pdata->power_gpio;
e5e5b31e	442	data->id = pdata->id;
493b67ef PU	443
	444	mutex_init(&data->mutex);
	445
	446	/* Set default register values */
	447	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	448	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	449	TPA6130A2_MUTE_L;
	450
	451	if (data->power_gpio >= 0) {
	452	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	453	if (ret < 0) {
	454	dev_err(dev, "Failed to request power GPIO (%d)\n",
	455	data->power_gpio);
7c4e6492	456	goto err_gpio;
493b67ef PU	457	}
493b67ef PU	458	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	459	}
493b67ef PU	460
e5e5b31e	461	switch (data->id) {
ad8332c1 JN	462	default:
	463	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	464	pdata->id);
2138301e	465	case TPA6130A2:
ad8332c1	466	regulator = "Vdd";
2138301e IK	467	break;
2138301e IK	468	case TPA6140A2:
ad8332c1	469	regulator = "AVdd";
2138301e	470	break;
2138301e	471	}
7c4e6492	472
ad8332c1 JN	473	data->supply = regulator_get(dev, regulator);
	474	if (IS_ERR(data->supply)) {
	475	ret = PTR_ERR(data->supply);
	476	dev_err(dev, "Failed to request supply: %d\n", ret);
7c4e6492 IK	477	goto err_regulator;
	478	}
	479
	480	ret = tpa6130a2_power(1);
	481	if (ret != 0)
	482	goto err_power;
	483
493b67ef PU	484
	485	/* Read version */
	486	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	487	TPA6130A2_VERSION_MASK;
	488	if ((ret != 1) && (ret != 2))
	489	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	490
	491	/* Disable the chip */
7c4e6492 IK	492	ret = tpa6130a2_power(0);
	493	if (ret != 0)
	494	goto err_power;
493b67ef PU	495
493b67ef PU	496	return 0;
7c4e6492 IK	497
7c4e6492 IK	498	err_power:
ad8332c1	499	regulator_put(data->supply);
7c4e6492 IK	500	err_regulator:
	501	if (data->power_gpio >= 0)
	502	gpio_free(data->power_gpio);
	503	err_gpio:
493b67ef PU	504	kfree(data);
493b67ef PU	505	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	506	tpa6130a2_client = NULL;
493b67ef PU	507
	508	return ret;
	509	}
	510
735fe4cf	511	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	512	{
	513	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	514
	515	tpa6130a2_power(0);
	516
	517	if (data->power_gpio >= 0)
	518	gpio_free(data->power_gpio);
7c4e6492	519
ad8332c1	520	regulator_put(data->supply);
7c4e6492	521
493b67ef	522	kfree(data);
ebab1b1d	523	tpa6130a2_client = NULL;
493b67ef PU	524
	525	return 0;
	526	}
	527
	528	static const struct i2c_device_id tpa6130a2_id[] = {
	529	{ "tpa6130a2", 0 },
	530	{ }
	531	};
	532	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	533
	534	static struct i2c_driver tpa6130a2_i2c_driver = {
	535	.driver = {
	536	.name = "tpa6130a2",
	537	.owner = THIS_MODULE,
	538	},
	539	.probe = tpa6130a2_probe,
	540	.remove = __devexit_p(tpa6130a2_remove),
	541	.id_table = tpa6130a2_id,
	542	};
	543
	544	static int __init tpa6130a2_init(void)
	545	{
	546	return i2c_add_driver(&tpa6130a2_i2c_driver);
	547	}
	548
	549	static void __exit tpa6130a2_exit(void)
	550	{
	551	i2c_del_driver(&tpa6130a2_i2c_driver);
	552	}
	553
	554	MODULE_AUTHOR("Peter Ujfalusi");
	555	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	556	MODULE_LICENSE("GPL");
	557
	558	module_init(tpa6130a2_init);
	559	module_exit(tpa6130a2_exit);