[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;
	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 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_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;

	BUG_ON(tpa6130a2_client == NULL);
	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;
	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;
	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) {
	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;
493b67ef PU	55	unsigned char power_state;
e5e5b31e	56	enum tpa_model id;
493b67ef PU	57	};
	58
	59	static int tpa6130a2_i2c_read(int reg)
	60	{
	61	struct tpa6130a2_data *data;
	62	int val;
	63
	64	BUG_ON(tpa6130a2_client == NULL);
	65	data = i2c_get_clientdata(tpa6130a2_client);
	66
	67	/* If powered off, return the cached value */
	68	if (data->power_state) {
	69	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	70	if (val < 0)
	71	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	72	else
	73	data->regs[reg] = val;
	74	} else {
	75	val = data->regs[reg];
	76	}
	77
	78	return val;
	79	}
	80
	81	static int tpa6130a2_i2c_write(int reg, u8 value)
	82	{
	83	struct tpa6130a2_data *data;
	84	int val = 0;
	85
	86	BUG_ON(tpa6130a2_client == NULL);
	87	data = i2c_get_clientdata(tpa6130a2_client);
	88
	89	if (data->power_state) {
	90	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
	91	if (val < 0)
	92	dev_err(&tpa6130a2_client->dev, "Write failed\n");
	93	}
	94
	95	/* Either powered on or off, we save the context */
	96	data->regs[reg] = value;
	97
	98	return val;
	99	}
	100
	101	static u8 tpa6130a2_read(int reg)
	102	{
	103	struct tpa6130a2_data *data;
	104
	105	BUG_ON(tpa6130a2_client == NULL);
	106	data = i2c_get_clientdata(tpa6130a2_client);
	107
	108	return data->regs[reg];
	109	}
	110
	111	static void tpa6130a2_initialize(void)
	112	{
	113	struct tpa6130a2_data *data;
	114	int i;
	115
	116	BUG_ON(tpa6130a2_client == NULL);
	117	data = i2c_get_clientdata(tpa6130a2_client);
	118
	119	for (i = 1; i < TPA6130A2_REG_VERSION; i++)
	120	tpa6130a2_i2c_write(i, data->regs[i]);
121	}
122
7c4e6492	123	static int tpa6130a2_power(int power)
493b67ef PU	124	{
	125	struct tpa6130a2_data *data;
	126	u8 val;
7c4e6492	127	int ret;
493b67ef PU	128
	129	BUG_ON(tpa6130a2_client == NULL);
	130	data = i2c_get_clientdata(tpa6130a2_client);
	131
	132	mutex_lock(&data->mutex);
	133	if (power) {
	134	/* Power on */
7c4e6492	135	if (data->power_gpio >= 0)
493b67ef	136	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	137
	138	ret = regulator_bulk_enable(ARRAY_SIZE(data->supplies),
	139	data->supplies);
	140	if (ret != 0) {
	141	dev_err(&tpa6130a2_client->dev,
	142	"Failed to enable supplies: %d\n", ret);
	143	goto exit;
493b67ef	144	}
7c4e6492 IK	145
	146	data->power_state = 1;
	147	tpa6130a2_initialize();
	148
493b67ef PU	149	/* Clear SWS */
	150	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	151	val &= ~TPA6130A2_SWS;
	152	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	153	} else {
	154	/* set SWS */
	155	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	156	val \|= TPA6130A2_SWS;
	157	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	158
493b67ef	159	/* Power off */
7c4e6492	160	if (data->power_gpio >= 0)
493b67ef	161	gpio_set_value(data->power_gpio, 0);
7c4e6492 IK	162
	163	ret = regulator_bulk_disable(ARRAY_SIZE(data->supplies),
	164	data->supplies);
	165	if (ret != 0) {
	166	dev_err(&tpa6130a2_client->dev,
	167	"Failed to disable supplies: %d\n", ret);
	168	goto exit;
493b67ef	169	}
7c4e6492 IK	170
7c4e6492 IK	171	data->power_state = 0;
493b67ef	172	}
7c4e6492 IK	173
7c4e6492 IK	174	exit:
493b67ef	175	mutex_unlock(&data->mutex);
7c4e6492	176	return ret;
493b67ef PU	177	}
493b67ef PU	178
bd843edf	179	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	180	struct snd_ctl_elem_value *ucontrol)
	181	{
	182	struct soc_mixer_control *mc =
	183	(struct soc_mixer_control *)kcontrol->private_value;
	184	struct tpa6130a2_data *data;
	185	unsigned int reg = mc->reg;
	186	unsigned int shift = mc->shift;
bd843edf PU	187	int max = mc->max;
bd843edf PU	188	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	189	unsigned int invert = mc->invert;
	190
	191	BUG_ON(tpa6130a2_client == NULL);
	192	data = i2c_get_clientdata(tpa6130a2_client);
	193
	194	mutex_lock(&data->mutex);
	195
	196	ucontrol->value.integer.value[0] =
	197	(tpa6130a2_read(reg) >> shift) & mask;
	198
	199	if (invert)
	200	ucontrol->value.integer.value[0] =
bd843edf	201	max - ucontrol->value.integer.value[0];
493b67ef PU	202
	203	mutex_unlock(&data->mutex);
	204	return 0;
	205	}
	206
bd843edf	207	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	208	struct snd_ctl_elem_value *ucontrol)
	209	{
	210	struct soc_mixer_control *mc =
	211	(struct soc_mixer_control *)kcontrol->private_value;
	212	struct tpa6130a2_data *data;
	213	unsigned int reg = mc->reg;
	214	unsigned int shift = mc->shift;
bd843edf PU	215	int max = mc->max;
bd843edf PU	216	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	217	unsigned int invert = mc->invert;
	218	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	219	unsigned int val_reg;
	220
	221	BUG_ON(tpa6130a2_client == NULL);
	222	data = i2c_get_clientdata(tpa6130a2_client);
	223
	224	if (invert)
bd843edf	225	val = max - val;
493b67ef PU	226
	227	mutex_lock(&data->mutex);
	228
	229	val_reg = tpa6130a2_read(reg);
	230	if (((val_reg >> shift) & mask) == val) {
	231	mutex_unlock(&data->mutex);
	232	return 0;
	233	}
	234
	235	val_reg &= ~(mask << shift);
	236	val_reg \|= val << shift;
	237	tpa6130a2_i2c_write(reg, val_reg);
	238
	239	mutex_unlock(&data->mutex);
	240
	241	return 1;
	242	}
	243
	244	/*
	245	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	246	* down in gain.
	247	*/
	248	static const unsigned int tpa6130_tlv[] = {
	249	TLV_DB_RANGE_HEAD(10),
	250	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	251	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	252	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	253	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	254	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	255	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	256	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	257	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	258	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	259	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	260	};
	261
	262	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
826e962c PU	263	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
826e962c PU	264	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	265	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	266	tpa6130_tlv),
493b67ef PU	267	};
493b67ef PU	268
e5e5b31e PU	269	static const unsigned int tpa6140_tlv[] = {
	270	TLV_DB_RANGE_HEAD(3),
	271	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	272	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	273	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	274	};
	275
	276	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	277	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	278	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	279	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	280	tpa6140_tlv),
e5e5b31e PU	281	};
e5e5b31e PU	282
493b67ef PU	283	/*
	284	* Enable or disable channel (left or right)
	285	* The bit number for mute and amplifier are the same per channel:
	286	* bit 6: Right channel
	287	* bit 7: Left channel
	288	* in both registers.
	289	*/
	290	static void tpa6130a2_channel_enable(u8 channel, int enable)
	291	{
493b67ef PU	292	u8 val;
493b67ef PU	293
493b67ef PU	294	if (enable) {
	295	/* Enable channel */
	296	/* Enable amplifier */
	297	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	298	val \|= channel;
	299	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	300
	301	/* Unmute channel */
	302	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	303	val &= ~channel;
	304	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	305	} else {
	306	/* Disable channel */
	307	/* Mute channel */
	308	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	309	val \|= channel;
	310	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	311
	312	/* Disable amplifier */
	313	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	314	val &= ~channel;
	315	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	316	}
	317	}
	318
	319	static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
	320	struct snd_kcontrol *kcontrol, int event)
	321	{
	322	switch (event) {
	323	case SND_SOC_DAPM_POST_PMU:
	324	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
	325	break;
	326	case SND_SOC_DAPM_POST_PMD:
	327	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
	328	break;
	329	}
	330	return 0;
	331	}
	332
	333	static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
	334	struct snd_kcontrol *kcontrol, int event)
	335	{
	336	switch (event) {
	337	case SND_SOC_DAPM_POST_PMU:
	338	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
	339	break;
	340	case SND_SOC_DAPM_POST_PMD:
	341	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
	342	break;
	343	}
	344	return 0;
	345	}
	346
	347	static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
	348	struct snd_kcontrol *kcontrol, int event)
	349	{
7c4e6492 IK	350	int ret = 0;
7c4e6492 IK	351
493b67ef PU	352	switch (event) {
493b67ef PU	353	case SND_SOC_DAPM_POST_PMU:
7c4e6492	354	ret = tpa6130a2_power(1);
493b67ef PU	355	break;
493b67ef PU	356	case SND_SOC_DAPM_POST_PMD:
7c4e6492	357	ret = tpa6130a2_power(0);
493b67ef PU	358	break;
493b67ef PU	359	}
7c4e6492	360	return ret;
493b67ef PU	361	}
	362
	363	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	364	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
	365	0, 0, NULL, 0, tpa6130a2_left_event,
	366	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	367	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
	368	0, 0, NULL, 0, tpa6130a2_right_event,
	369	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	370	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
	371	0, 0, tpa6130a2_supply_event,
	372	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	373	/* Outputs */
266d38c8 JN	374	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"),
266d38c8 JN	375	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"),
493b67ef PU	376	};
	377
	378	static const struct snd_soc_dapm_route audio_map[] = {
	379	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	380	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},
	381
	382	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	383	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
	384	};
	385
	386	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	387	{
e5e5b31e PU	388	struct tpa6130a2_data *data;
	389
	390	BUG_ON(tpa6130a2_client == NULL);
	391	data = i2c_get_clientdata(tpa6130a2_client);
	392
493b67ef PU	393	snd_soc_dapm_new_controls(codec, tpa6130a2_dapm_widgets,
	394	ARRAY_SIZE(tpa6130a2_dapm_widgets));
	395
	396	snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
	397
e5e5b31e PU	398	if (data->id == TPA6140A2)
	399	return snd_soc_add_controls(codec, tpa6140a2_controls,
	400	ARRAY_SIZE(tpa6140a2_controls));
	401	else
	402	return snd_soc_add_controls(codec, tpa6130a2_controls,
	403	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	404
	405	}
	406	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	407
735fe4cf MB	408	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	409	const struct i2c_device_id *id)
493b67ef PU	410	{
	411	struct device *dev;
	412	struct tpa6130a2_data *data;
	413	struct tpa6130a2_platform_data *pdata;
7c4e6492	414	int i, ret;
493b67ef PU	415
	416	dev = &client->dev;
	417
	418	if (client->dev.platform_data == NULL) {
	419	dev_err(dev, "Platform data not set\n");
	420	dump_stack();
	421	return -ENODEV;
	422	}
	423
	424	data = kzalloc(sizeof(*data), GFP_KERNEL);
	425	if (data == NULL) {
	426	dev_err(dev, "Can not allocate memory\n");
	427	return -ENOMEM;
	428	}
	429
	430	tpa6130a2_client = client;
	431
	432	i2c_set_clientdata(tpa6130a2_client, data);
	433
ebab1b1d	434	pdata = client->dev.platform_data;
493b67ef	435	data->power_gpio = pdata->power_gpio;
e5e5b31e	436	data->id = pdata->id;
493b67ef PU	437
	438	mutex_init(&data->mutex);
	439
	440	/* Set default register values */
	441	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	442	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	443	TPA6130A2_MUTE_L;
	444
	445	if (data->power_gpio >= 0) {
	446	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	447	if (ret < 0) {
	448	dev_err(dev, "Failed to request power GPIO (%d)\n",
	449	data->power_gpio);
7c4e6492	450	goto err_gpio;
493b67ef PU	451	}
493b67ef PU	452	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	453	}
493b67ef PU	454
e5e5b31e	455	switch (data->id) {
2138301e IK	456	case TPA6130A2:
	457	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	458	data->supplies[i].supply = tpa6130a2_supply_names[i];
	459	break;
	460	case TPA6140A2:
	461	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	462	data->supplies[i].supply = tpa6140a2_supply_names[i];;
	463	break;
	464	default:
	465	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	466	pdata->id);
	467	for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
	468	data->supplies[i].supply = tpa6130a2_supply_names[i];
	469	}
7c4e6492 IK	470
	471	ret = regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
	472	data->supplies);
	473	if (ret != 0) {
	474	dev_err(dev, "Failed to request supplies: %d\n", ret);
	475	goto err_regulator;
	476	}
	477
	478	ret = tpa6130a2_power(1);
	479	if (ret != 0)
	480	goto err_power;
	481
493b67ef PU	482
	483	/* Read version */
	484	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	485	TPA6130A2_VERSION_MASK;
	486	if ((ret != 1) && (ret != 2))
	487	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	488
	489	/* Disable the chip */
7c4e6492 IK	490	ret = tpa6130a2_power(0);
	491	if (ret != 0)
	492	goto err_power;
493b67ef PU	493
493b67ef PU	494	return 0;
7c4e6492 IK	495
	496	err_power:
	497	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
	498	err_regulator:
	499	if (data->power_gpio >= 0)
	500	gpio_free(data->power_gpio);
	501	err_gpio:
493b67ef PU	502	kfree(data);
493b67ef PU	503	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	504	tpa6130a2_client = NULL;
493b67ef PU	505
	506	return ret;
	507	}
	508
735fe4cf	509	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	510	{
	511	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	512
	513	tpa6130a2_power(0);
	514
	515	if (data->power_gpio >= 0)
	516	gpio_free(data->power_gpio);
7c4e6492 IK	517
	518	regulator_bulk_free(ARRAY_SIZE(data->supplies), data->supplies);
	519
493b67ef	520	kfree(data);
ebab1b1d	521	tpa6130a2_client = NULL;
493b67ef PU	522
	523	return 0;
	524	}
	525
	526	static const struct i2c_device_id tpa6130a2_id[] = {
	527	{ "tpa6130a2", 0 },
	528	{ }
	529	};
	530	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	531
	532	static struct i2c_driver tpa6130a2_i2c_driver = {
	533	.driver = {
	534	.name = "tpa6130a2",
	535	.owner = THIS_MODULE,
	536	},
	537	.probe = tpa6130a2_probe,
	538	.remove = __devexit_p(tpa6130a2_remove),
	539	.id_table = tpa6130a2_id,
	540	};
	541
	542	static int __init tpa6130a2_init(void)
	543	{
	544	return i2c_add_driver(&tpa6130a2_i2c_driver);
	545	}
	546
	547	static void __exit tpa6130a2_exit(void)
	548	{
	549	i2c_del_driver(&tpa6130a2_i2c_driver);
	550	}
	551
	552	MODULE_AUTHOR("Peter Ujfalusi");
	553	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	554	MODULE_LICENSE("GPL");
	555
	556	module_init(tpa6130a2_init);
	557	module_exit(tpa6130a2_exit);