[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");
			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;

	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;

	if (tpa6130a2_client == NULL)
		return -ENODEV;

	data = i2c_get_clientdata(tpa6130a2_client);

	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));

	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);
7a479b02	81	if (val < 0) {
493b67ef	82	dev_err(&tpa6130a2_client->dev, "Write failed\n");
7a479b02 AL	83	return val;
7a479b02 AL	84	}
493b67ef PU	85	}
	86
	87	/* Either powered on or off, we save the context */
	88	data->regs[reg] = value;
	89
	90	return val;
	91	}
	92
	93	static u8 tpa6130a2_read(int reg)
	94	{
	95	struct tpa6130a2_data *data;
	96
	97	BUG_ON(tpa6130a2_client == NULL);
	98	data = i2c_get_clientdata(tpa6130a2_client);
	99
	100	return data->regs[reg];
	101	}
	102
872a64d7	103	static int tpa6130a2_initialize(void)
493b67ef PU	104	{
493b67ef PU	105	struct tpa6130a2_data *data;
872a64d7	106	int i, ret = 0;
493b67ef PU	107
	108	BUG_ON(tpa6130a2_client == NULL);
	109	data = i2c_get_clientdata(tpa6130a2_client);
	110
872a64d7 PU	111	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
	112	ret = tpa6130a2_i2c_write(i, data->regs[i]);
	113	if (ret < 0)
	114	break;
	115	}
	116
	117	return ret;
493b67ef PU	118	}
493b67ef PU	119
7c4e6492	120	static int tpa6130a2_power(int power)
493b67ef PU	121	{
	122	struct tpa6130a2_data *data;
	123	u8 val;
75e3f313	124	int ret = 0;
493b67ef PU	125
	126	BUG_ON(tpa6130a2_client == NULL);
	127	data = i2c_get_clientdata(tpa6130a2_client);
	128
	129	mutex_lock(&data->mutex);
63f7526f	130	if (power && !data->power_state) {
493b67ef	131	/* Power on */
7c4e6492	132	if (data->power_gpio >= 0)
493b67ef	133	gpio_set_value(data->power_gpio, 1);
7c4e6492	134
ad8332c1	135	ret = regulator_enable(data->supply);
7c4e6492 IK	136	if (ret != 0) {
7c4e6492 IK	137	dev_err(&tpa6130a2_client->dev,
ad8332c1	138	"Failed to enable supply: %d\n", ret);
7c4e6492	139	goto exit;
493b67ef	140	}
7c4e6492 IK	141
7c4e6492 IK	142	data->power_state = 1;
872a64d7 PU	143	ret = tpa6130a2_initialize();
	144	if (ret < 0) {
	145	dev_err(&tpa6130a2_client->dev,
	146	"Failed to initialize chip\n");
	147	if (data->power_gpio >= 0)
	148	gpio_set_value(data->power_gpio, 0);
	149	regulator_disable(data->supply);
	150	data->power_state = 0;
	151	goto exit;
	152	}
7c4e6492	153
493b67ef PU	154	/* Clear SWS */
	155	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	156	val &= ~TPA6130A2_SWS;
	157	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
63f7526f	158	} else if (!power && data->power_state) {
493b67ef PU	159	/* set SWS */
	160	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	161	val \|= TPA6130A2_SWS;
	162	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	163
493b67ef	164	/* Power off */
7c4e6492	165	if (data->power_gpio >= 0)
493b67ef	166	gpio_set_value(data->power_gpio, 0);
7c4e6492	167
ad8332c1	168	ret = regulator_disable(data->supply);
7c4e6492 IK	169	if (ret != 0) {
7c4e6492 IK	170	dev_err(&tpa6130a2_client->dev,
ad8332c1	171	"Failed to disable supply: %d\n", ret);
7c4e6492	172	goto exit;
493b67ef	173	}
7c4e6492 IK	174
7c4e6492 IK	175	data->power_state = 0;
493b67ef	176	}
7c4e6492 IK	177
7c4e6492 IK	178	exit:
493b67ef	179	mutex_unlock(&data->mutex);
7c4e6492	180	return ret;
493b67ef PU	181	}
493b67ef PU	182
bd843edf	183	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	184	struct snd_ctl_elem_value *ucontrol)
	185	{
	186	struct soc_mixer_control *mc =
	187	(struct soc_mixer_control *)kcontrol->private_value;
	188	struct tpa6130a2_data *data;
	189	unsigned int reg = mc->reg;
	190	unsigned int shift = mc->shift;
bd843edf PU	191	int max = mc->max;
bd843edf PU	192	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	193	unsigned int invert = mc->invert;
	194
	195	BUG_ON(tpa6130a2_client == NULL);
	196	data = i2c_get_clientdata(tpa6130a2_client);
	197
	198	mutex_lock(&data->mutex);
	199
	200	ucontrol->value.integer.value[0] =
	201	(tpa6130a2_read(reg) >> shift) & mask;
	202
	203	if (invert)
	204	ucontrol->value.integer.value[0] =
bd843edf	205	max - ucontrol->value.integer.value[0];
493b67ef PU	206
	207	mutex_unlock(&data->mutex);
	208	return 0;
	209	}
	210
bd843edf	211	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	212	struct snd_ctl_elem_value *ucontrol)
	213	{
	214	struct soc_mixer_control *mc =
	215	(struct soc_mixer_control *)kcontrol->private_value;
	216	struct tpa6130a2_data *data;
	217	unsigned int reg = mc->reg;
	218	unsigned int shift = mc->shift;
bd843edf PU	219	int max = mc->max;
bd843edf PU	220	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	221	unsigned int invert = mc->invert;
	222	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	223	unsigned int val_reg;
	224
	225	BUG_ON(tpa6130a2_client == NULL);
	226	data = i2c_get_clientdata(tpa6130a2_client);
	227
	228	if (invert)
bd843edf	229	val = max - val;
493b67ef PU	230
	231	mutex_lock(&data->mutex);
	232
	233	val_reg = tpa6130a2_read(reg);
	234	if (((val_reg >> shift) & mask) == val) {
	235	mutex_unlock(&data->mutex);
	236	return 0;
	237	}
	238
	239	val_reg &= ~(mask << shift);
	240	val_reg \|= val << shift;
	241	tpa6130a2_i2c_write(reg, val_reg);
	242
	243	mutex_unlock(&data->mutex);
	244
	245	return 1;
	246	}
	247
	248	/*
	249	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	250	* down in gain.
	251	*/
	252	static const unsigned int tpa6130_tlv[] = {
	253	TLV_DB_RANGE_HEAD(10),
	254	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	255	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	256	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	257	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	258	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	259	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	260	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	261	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	262	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	263	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	264	};
	265
	266	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	267	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	268	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	269	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	270	tpa6130_tlv),
	271	};
	272
e5e5b31e PU	273	static const unsigned int tpa6140_tlv[] = {
	274	TLV_DB_RANGE_HEAD(3),
	275	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	276	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	277	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	278	};
	279
	280	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	281	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	282	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	283	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	284	tpa6140_tlv),
e5e5b31e PU	285	};
e5e5b31e PU	286
493b67ef PU	287	/*
	288	* Enable or disable channel (left or right)
	289	* The bit number for mute and amplifier are the same per channel:
	290	* bit 6: Right channel
	291	* bit 7: Left channel
	292	* in both registers.
	293	*/
	294	static void tpa6130a2_channel_enable(u8 channel, int enable)
	295	{
493b67ef PU	296	u8 val;
493b67ef PU	297
493b67ef PU	298	if (enable) {
	299	/* Enable channel */
	300	/* Enable amplifier */
	301	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	302	val \|= channel;
	303	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	304
	305	/* Unmute channel */
	306	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	307	val &= ~channel;
	308	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	309	} else {
	310	/* Disable channel */
	311	/* Mute channel */
	312	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	313	val \|= channel;
	314	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	315
	316	/* Disable amplifier */
	317	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	318	val &= ~channel;
	319	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	320	}
	321	}
	322
	323	static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
	324	struct snd_kcontrol *kcontrol, int event)
	325	{
	326	switch (event) {
	327	case SND_SOC_DAPM_POST_PMU:
	328	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
	329	break;
	330	case SND_SOC_DAPM_POST_PMD:
	331	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
	332	break;
	333	}
	334	return 0;
	335	}
	336
	337	static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
	338	struct snd_kcontrol *kcontrol, int event)
	339	{
	340	switch (event) {
	341	case SND_SOC_DAPM_POST_PMU:
	342	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
	343	break;
	344	case SND_SOC_DAPM_POST_PMD:
	345	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
	346	break;
	347	}
	348	return 0;
	349	}
	350
	351	static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
	352	struct snd_kcontrol *kcontrol, int event)
	353	{
7c4e6492 IK	354	int ret = 0;
7c4e6492 IK	355
493b67ef PU	356	switch (event) {
493b67ef PU	357	case SND_SOC_DAPM_POST_PMU:
7c4e6492	358	ret = tpa6130a2_power(1);
493b67ef PU	359	break;
493b67ef PU	360	case SND_SOC_DAPM_POST_PMD:
7c4e6492	361	ret = tpa6130a2_power(0);
493b67ef PU	362	break;
493b67ef PU	363	}
7c4e6492	364	return ret;
493b67ef PU	365	}
	366
	367	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	368	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
	369	0, 0, NULL, 0, tpa6130a2_left_event,
	370	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	371	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
	372	0, 0, NULL, 0, tpa6130a2_right_event,
	373	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	374	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
	375	0, 0, tpa6130a2_supply_event,
	376	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	377	/* Outputs */
266d38c8 JN	378	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"),
266d38c8 JN	379	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"),
493b67ef PU	380	};
	381
	382	static const struct snd_soc_dapm_route audio_map[] = {
	383	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	384	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},
	385
	386	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	387	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
	388	};
	389
	390	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	391	{
e5e5b31e PU	392	struct tpa6130a2_data *data;
e5e5b31e PU	393
872a64d7 PU	394	if (tpa6130a2_client == NULL)
	395	return -ENODEV;
	396
e5e5b31e PU	397	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	398
493b67ef PU	399	snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets,
	400	ARRAY_SIZE(tpa6130a2_dapm_widgets));
	401
	402	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
	403
e5e5b31e PU	404	if (data->id == TPA6140A2)
	405	return snd_soc_add_controls(codec, tpa6140a2_controls,
	406	ARRAY_SIZE(tpa6140a2_controls));
	407	else
	408	return snd_soc_add_controls(codec, tpa6130a2_controls,
	409	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	410
	411	}
	412	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	413
735fe4cf MB	414	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	415	const struct i2c_device_id *id)
493b67ef PU	416	{
	417	struct device *dev;
	418	struct tpa6130a2_data *data;
	419	struct tpa6130a2_platform_data *pdata;
ad8332c1 JN	420	const char *regulator;
ad8332c1 JN	421	int ret;
493b67ef PU	422
	423	dev = &client->dev;
	424
	425	if (client->dev.platform_data == NULL) {
	426	dev_err(dev, "Platform data not set\n");
	427	dump_stack();
	428	return -ENODEV;
	429	}
	430
	431	data = kzalloc(sizeof(*data), GFP_KERNEL);
	432	if (data == NULL) {
	433	dev_err(dev, "Can not allocate memory\n");
	434	return -ENOMEM;
	435	}
	436
	437	tpa6130a2_client = client;
	438
	439	i2c_set_clientdata(tpa6130a2_client, data);
	440
ebab1b1d	441	pdata = client->dev.platform_data;
493b67ef	442	data->power_gpio = pdata->power_gpio;
e5e5b31e	443	data->id = pdata->id;
493b67ef PU	444
	445	mutex_init(&data->mutex);
	446
	447	/* Set default register values */
	448	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	449	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	450	TPA6130A2_MUTE_L;
	451
	452	if (data->power_gpio >= 0) {
	453	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	454	if (ret < 0) {
	455	dev_err(dev, "Failed to request power GPIO (%d)\n",
	456	data->power_gpio);
7c4e6492	457	goto err_gpio;
493b67ef PU	458	}
493b67ef PU	459	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	460	}
493b67ef PU	461
e5e5b31e	462	switch (data->id) {
ad8332c1 JN	463	default:
	464	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	465	pdata->id);
2138301e	466	case TPA6130A2:
ad8332c1	467	regulator = "Vdd";
2138301e IK	468	break;
2138301e IK	469	case TPA6140A2:
ad8332c1	470	regulator = "AVdd";
2138301e	471	break;
2138301e	472	}
7c4e6492	473
ad8332c1 JN	474	data->supply = regulator_get(dev, regulator);
	475	if (IS_ERR(data->supply)) {
	476	ret = PTR_ERR(data->supply);
	477	dev_err(dev, "Failed to request supply: %d\n", ret);
7c4e6492 IK	478	goto err_regulator;
	479	}
	480
	481	ret = tpa6130a2_power(1);
	482	if (ret != 0)
	483	goto err_power;
	484
493b67ef PU	485
	486	/* Read version */
	487	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	488	TPA6130A2_VERSION_MASK;
	489	if ((ret != 1) && (ret != 2))
	490	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	491
	492	/* Disable the chip */
7c4e6492 IK	493	ret = tpa6130a2_power(0);
	494	if (ret != 0)
	495	goto err_power;
493b67ef PU	496
493b67ef PU	497	return 0;
7c4e6492 IK	498
7c4e6492 IK	499	err_power:
ad8332c1	500	regulator_put(data->supply);
7c4e6492 IK	501	err_regulator:
	502	if (data->power_gpio >= 0)
	503	gpio_free(data->power_gpio);
	504	err_gpio:
493b67ef PU	505	kfree(data);
493b67ef PU	506	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	507	tpa6130a2_client = NULL;
493b67ef PU	508
	509	return ret;
	510	}
	511
735fe4cf	512	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	513	{
	514	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	515
	516	tpa6130a2_power(0);
	517
	518	if (data->power_gpio >= 0)
	519	gpio_free(data->power_gpio);
7c4e6492	520
ad8332c1	521	regulator_put(data->supply);
7c4e6492	522
493b67ef	523	kfree(data);
ebab1b1d	524	tpa6130a2_client = NULL;
493b67ef PU	525
	526	return 0;
	527	}
	528
	529	static const struct i2c_device_id tpa6130a2_id[] = {
	530	{ "tpa6130a2", 0 },
	531	{ }
	532	};
	533	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	534
	535	static struct i2c_driver tpa6130a2_i2c_driver = {
	536	.driver = {
	537	.name = "tpa6130a2",
	538	.owner = THIS_MODULE,
	539	},
	540	.probe = tpa6130a2_probe,
	541	.remove = __devexit_p(tpa6130a2_remove),
	542	.id_table = tpa6130a2_id,
	543	};
	544
	545	static int __init tpa6130a2_init(void)
	546	{
	547	return i2c_add_driver(&tpa6130a2_i2c_driver);
	548	}
	549
	550	static void __exit tpa6130a2_exit(void)
	551	{
	552	i2c_del_driver(&tpa6130a2_i2c_driver);
	553	}
	554
	555	MODULE_AUTHOR("Peter Ujfalusi");
	556	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	557	MODULE_LICENSE("GPL");
	558
	559	module_init(tpa6130a2_init);
	560	module_exit(tpa6130a2_exit);