[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/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;
	u8 power_state:1;
	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(u8 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)
		goto exit;

	if (power) {
		ret = regulator_enable(data->supply);
		if (ret != 0) {
			dev_err(&tpa6130a2_client->dev,
				"Failed to enable supply: %d\n", ret);
			goto exit;
		}
		/* Power on */
		if (data->power_gpio >= 0)
			gpio_set_value(data->power_gpio, 1);

		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 {
		/* 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>
493b67ef PU	31	#include <sound/soc.h>
493b67ef PU	32	#include <sound/tlv.h>
	33
	34	#include "tpa6130a2.h"
	35
ebab1b1d	36	static struct i2c_client *tpa6130a2_client;
493b67ef PU	37
	38	/* This struct is used to save the context */
	39	struct tpa6130a2_data {
	40	struct mutex mutex;
	41	unsigned char regs[TPA6130A2_CACHEREGNUM];
ad8332c1	42	struct regulator *supply;
493b67ef	43	int power_gpio;
d5876ce1	44	u8 power_state:1;
e5e5b31e	45	enum tpa_model id;
493b67ef PU	46	};
	47
	48	static int tpa6130a2_i2c_read(int reg)
	49	{
	50	struct tpa6130a2_data *data;
	51	int val;
	52
	53	BUG_ON(tpa6130a2_client == NULL);
	54	data = i2c_get_clientdata(tpa6130a2_client);
	55
	56	/* If powered off, return the cached value */
	57	if (data->power_state) {
	58	val = i2c_smbus_read_byte_data(tpa6130a2_client, reg);
	59	if (val < 0)
	60	dev_err(&tpa6130a2_client->dev, "Read failed\n");
	61	else
	62	data->regs[reg] = val;
	63	} else {
	64	val = data->regs[reg];
	65	}
	66
	67	return val;
	68	}
	69
	70	static int tpa6130a2_i2c_write(int reg, u8 value)
	71	{
	72	struct tpa6130a2_data *data;
	73	int val = 0;
	74
	75	BUG_ON(tpa6130a2_client == NULL);
	76	data = i2c_get_clientdata(tpa6130a2_client);
	77
	78	if (data->power_state) {
	79	val = i2c_smbus_write_byte_data(tpa6130a2_client, reg, value);
7a479b02	80	if (val < 0) {
493b67ef	81	dev_err(&tpa6130a2_client->dev, "Write failed\n");
7a479b02 AL	82	return val;
7a479b02 AL	83	}
493b67ef PU	84	}
	85
	86	/* Either powered on or off, we save the context */
	87	data->regs[reg] = value;
	88
	89	return val;
	90	}
	91
	92	static u8 tpa6130a2_read(int reg)
	93	{
	94	struct tpa6130a2_data *data;
	95
	96	BUG_ON(tpa6130a2_client == NULL);
	97	data = i2c_get_clientdata(tpa6130a2_client);
	98
	99	return data->regs[reg];
	100	}
	101
872a64d7	102	static int tpa6130a2_initialize(void)
493b67ef PU	103	{
493b67ef PU	104	struct tpa6130a2_data *data;
872a64d7	105	int i, ret = 0;
493b67ef PU	106
	107	BUG_ON(tpa6130a2_client == NULL);
	108	data = i2c_get_clientdata(tpa6130a2_client);
	109
872a64d7 PU	110	for (i = 1; i < TPA6130A2_REG_VERSION; i++) {
	111	ret = tpa6130a2_i2c_write(i, data->regs[i]);
	112	if (ret < 0)
	113	break;
	114	}
	115
	116	return ret;
493b67ef PU	117	}
493b67ef PU	118
d5876ce1	119	static int tpa6130a2_power(u8 power)
493b67ef PU	120	{
	121	struct tpa6130a2_data *data;
	122	u8 val;
75e3f313	123	int ret = 0;
493b67ef PU	124
	125	BUG_ON(tpa6130a2_client == NULL);
	126	data = i2c_get_clientdata(tpa6130a2_client);
	127
	128	mutex_lock(&data->mutex);
d5876ce1 PU	129	if (power == data->power_state)
d5876ce1 PU	130	goto exit;
7c4e6492	131
d5876ce1	132	if (power) {
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	}
0656f6cf JN	139	/* Power on */
	140	if (data->power_gpio >= 0)
	141	gpio_set_value(data->power_gpio, 1);
7c4e6492 IK	142
7c4e6492 IK	143	data->power_state = 1;
872a64d7 PU	144	ret = tpa6130a2_initialize();
	145	if (ret < 0) {
	146	dev_err(&tpa6130a2_client->dev,
	147	"Failed to initialize chip\n");
	148	if (data->power_gpio >= 0)
	149	gpio_set_value(data->power_gpio, 0);
	150	regulator_disable(data->supply);
	151	data->power_state = 0;
	152	goto exit;
	153	}
7c4e6492	154
493b67ef PU	155	/* Clear SWS */
	156	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	157	val &= ~TPA6130A2_SWS;
	158	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
d5876ce1	159	} else {
493b67ef PU	160	/* set SWS */
	161	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	162	val \|= TPA6130A2_SWS;
	163	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
7c4e6492	164
493b67ef	165	/* Power off */
7c4e6492	166	if (data->power_gpio >= 0)
493b67ef	167	gpio_set_value(data->power_gpio, 0);
7c4e6492	168
ad8332c1	169	ret = regulator_disable(data->supply);
7c4e6492 IK	170	if (ret != 0) {
7c4e6492 IK	171	dev_err(&tpa6130a2_client->dev,
ad8332c1	172	"Failed to disable supply: %d\n", ret);
7c4e6492	173	goto exit;
493b67ef	174	}
7c4e6492 IK	175
7c4e6492 IK	176	data->power_state = 0;
493b67ef	177	}
7c4e6492 IK	178
7c4e6492 IK	179	exit:
493b67ef	180	mutex_unlock(&data->mutex);
7c4e6492	181	return ret;
493b67ef PU	182	}
493b67ef PU	183
bd843edf	184	static int tpa6130a2_get_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	185	struct snd_ctl_elem_value *ucontrol)
	186	{
	187	struct soc_mixer_control *mc =
	188	(struct soc_mixer_control *)kcontrol->private_value;
	189	struct tpa6130a2_data *data;
	190	unsigned int reg = mc->reg;
	191	unsigned int shift = mc->shift;
bd843edf PU	192	int max = mc->max;
bd843edf PU	193	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	194	unsigned int invert = mc->invert;
	195
	196	BUG_ON(tpa6130a2_client == NULL);
	197	data = i2c_get_clientdata(tpa6130a2_client);
	198
	199	mutex_lock(&data->mutex);
	200
	201	ucontrol->value.integer.value[0] =
	202	(tpa6130a2_read(reg) >> shift) & mask;
	203
	204	if (invert)
	205	ucontrol->value.integer.value[0] =
bd843edf	206	max - ucontrol->value.integer.value[0];
493b67ef PU	207
	208	mutex_unlock(&data->mutex);
	209	return 0;
	210	}
	211
bd843edf	212	static int tpa6130a2_put_volsw(struct snd_kcontrol *kcontrol,
493b67ef PU	213	struct snd_ctl_elem_value *ucontrol)
	214	{
	215	struct soc_mixer_control *mc =
	216	(struct soc_mixer_control *)kcontrol->private_value;
	217	struct tpa6130a2_data *data;
	218	unsigned int reg = mc->reg;
	219	unsigned int shift = mc->shift;
bd843edf PU	220	int max = mc->max;
bd843edf PU	221	unsigned int mask = (1 << fls(max)) - 1;
493b67ef PU	222	unsigned int invert = mc->invert;
	223	unsigned int val = (ucontrol->value.integer.value[0] & mask);
	224	unsigned int val_reg;
	225
	226	BUG_ON(tpa6130a2_client == NULL);
	227	data = i2c_get_clientdata(tpa6130a2_client);
	228
	229	if (invert)
bd843edf	230	val = max - val;
493b67ef PU	231
	232	mutex_lock(&data->mutex);
	233
	234	val_reg = tpa6130a2_read(reg);
	235	if (((val_reg >> shift) & mask) == val) {
	236	mutex_unlock(&data->mutex);
	237	return 0;
	238	}
	239
	240	val_reg &= ~(mask << shift);
	241	val_reg \|= val << shift;
	242	tpa6130a2_i2c_write(reg, val_reg);
	243
	244	mutex_unlock(&data->mutex);
	245
	246	return 1;
	247	}
	248
	249	/*
	250	* TPA6130 volume. From -59.5 to 4 dB with increasing step size when going
	251	* down in gain.
	252	*/
	253	static const unsigned int tpa6130_tlv[] = {
	254	TLV_DB_RANGE_HEAD(10),
	255	0, 1, TLV_DB_SCALE_ITEM(-5950, 600, 0),
	256	2, 3, TLV_DB_SCALE_ITEM(-5000, 250, 0),
	257	4, 5, TLV_DB_SCALE_ITEM(-4550, 160, 0),
	258	6, 7, TLV_DB_SCALE_ITEM(-4140, 190, 0),
	259	8, 9, TLV_DB_SCALE_ITEM(-3650, 120, 0),
	260	10, 11, TLV_DB_SCALE_ITEM(-3330, 160, 0),
	261	12, 13, TLV_DB_SCALE_ITEM(-3040, 180, 0),
	262	14, 20, TLV_DB_SCALE_ITEM(-2710, 110, 0),
	263	21, 37, TLV_DB_SCALE_ITEM(-1960, 74, 0),
	264	38, 63, TLV_DB_SCALE_ITEM(-720, 45, 0),
	265	};
	266
	267	static const struct snd_kcontrol_new tpa6130a2_controls[] = {
	268	SOC_SINGLE_EXT_TLV("TPA6130A2 Headphone Playback Volume",
	269	TPA6130A2_REG_VOL_MUTE, 0, 0x3f, 0,
bd843edf	270	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
493b67ef PU	271	tpa6130_tlv),
	272	};
	273
e5e5b31e PU	274	static const unsigned int tpa6140_tlv[] = {
	275	TLV_DB_RANGE_HEAD(3),
	276	0, 8, TLV_DB_SCALE_ITEM(-5900, 400, 0),
	277	9, 16, TLV_DB_SCALE_ITEM(-2500, 200, 0),
	278	17, 31, TLV_DB_SCALE_ITEM(-1000, 100, 0),
	279	};
	280
	281	static const struct snd_kcontrol_new tpa6140a2_controls[] = {
826e962c PU	282	SOC_SINGLE_EXT_TLV("TPA6140A2 Headphone Playback Volume",
826e962c PU	283	TPA6130A2_REG_VOL_MUTE, 1, 0x1f, 0,
bd843edf	284	tpa6130a2_get_volsw, tpa6130a2_put_volsw,
826e962c	285	tpa6140_tlv),
e5e5b31e PU	286	};
e5e5b31e PU	287
493b67ef PU	288	/*
	289	* Enable or disable channel (left or right)
	290	* The bit number for mute and amplifier are the same per channel:
	291	* bit 6: Right channel
	292	* bit 7: Left channel
	293	* in both registers.
	294	*/
	295	static void tpa6130a2_channel_enable(u8 channel, int enable)
	296	{
493b67ef PU	297	u8 val;
493b67ef PU	298
493b67ef PU	299	if (enable) {
	300	/* Enable channel */
	301	/* Enable amplifier */
	302	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	303	val \|= channel;
	304	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	305
	306	/* Unmute channel */
	307	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	308	val &= ~channel;
	309	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	310	} else {
	311	/* Disable channel */
	312	/* Mute channel */
	313	val = tpa6130a2_read(TPA6130A2_REG_VOL_MUTE);
	314	val \|= channel;
	315	tpa6130a2_i2c_write(TPA6130A2_REG_VOL_MUTE, val);
	316
	317	/* Disable amplifier */
	318	val = tpa6130a2_read(TPA6130A2_REG_CONTROL);
	319	val &= ~channel;
	320	tpa6130a2_i2c_write(TPA6130A2_REG_CONTROL, val);
	321	}
	322	}
	323
	324	static int tpa6130a2_left_event(struct snd_soc_dapm_widget *w,
	325	struct snd_kcontrol *kcontrol, int event)
	326	{
	327	switch (event) {
	328	case SND_SOC_DAPM_POST_PMU:
	329	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 1);
	330	break;
	331	case SND_SOC_DAPM_POST_PMD:
	332	tpa6130a2_channel_enable(TPA6130A2_HP_EN_L, 0);
	333	break;
	334	}
	335	return 0;
	336	}
	337
	338	static int tpa6130a2_right_event(struct snd_soc_dapm_widget *w,
	339	struct snd_kcontrol *kcontrol, int event)
	340	{
	341	switch (event) {
	342	case SND_SOC_DAPM_POST_PMU:
	343	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 1);
	344	break;
	345	case SND_SOC_DAPM_POST_PMD:
	346	tpa6130a2_channel_enable(TPA6130A2_HP_EN_R, 0);
	347	break;
	348	}
	349	return 0;
	350	}
	351
	352	static int tpa6130a2_supply_event(struct snd_soc_dapm_widget *w,
	353	struct snd_kcontrol *kcontrol, int event)
	354	{
7c4e6492 IK	355	int ret = 0;
7c4e6492 IK	356
493b67ef PU	357	switch (event) {
493b67ef PU	358	case SND_SOC_DAPM_POST_PMU:
7c4e6492	359	ret = tpa6130a2_power(1);
493b67ef PU	360	break;
493b67ef PU	361	case SND_SOC_DAPM_POST_PMD:
7c4e6492	362	ret = tpa6130a2_power(0);
493b67ef PU	363	break;
493b67ef PU	364	}
7c4e6492	365	return ret;
493b67ef PU	366	}
	367
	368	static const struct snd_soc_dapm_widget tpa6130a2_dapm_widgets[] = {
	369	SND_SOC_DAPM_PGA_E("TPA6130A2 Left", SND_SOC_NOPM,
	370	0, 0, NULL, 0, tpa6130a2_left_event,
	371	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	372	SND_SOC_DAPM_PGA_E("TPA6130A2 Right", SND_SOC_NOPM,
	373	0, 0, NULL, 0, tpa6130a2_right_event,
	374	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	375	SND_SOC_DAPM_SUPPLY("TPA6130A2 Enable", SND_SOC_NOPM,
	376	0, 0, tpa6130a2_supply_event,
	377	SND_SOC_DAPM_POST_PMU\|SND_SOC_DAPM_POST_PMD),
	378	/* Outputs */
266d38c8 JN	379	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Left"),
266d38c8 JN	380	SND_SOC_DAPM_OUTPUT("TPA6130A2 Headphone Right"),
493b67ef PU	381	};
	382
	383	static const struct snd_soc_dapm_route audio_map[] = {
	384	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Left"},
	385	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Right"},
	386
	387	{"TPA6130A2 Headphone Left", NULL, "TPA6130A2 Enable"},
	388	{"TPA6130A2 Headphone Right", NULL, "TPA6130A2 Enable"},
	389	};
	390
	391	int tpa6130a2_add_controls(struct snd_soc_codec *codec)
	392	{
e5e5b31e	393	struct tpa6130a2_data *data;
ce6120cc	394	struct snd_soc_dapm_context *dapm = &codec->dapm;
e5e5b31e	395
872a64d7 PU	396	if (tpa6130a2_client == NULL)
	397	return -ENODEV;
	398
e5e5b31e PU	399	data = i2c_get_clientdata(tpa6130a2_client);
e5e5b31e PU	400
ce6120cc	401	snd_soc_dapm_new_controls(dapm, tpa6130a2_dapm_widgets,
493b67ef PU	402	ARRAY_SIZE(tpa6130a2_dapm_widgets));
493b67ef PU	403
ce6120cc	404	snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
493b67ef	405
e5e5b31e PU	406	if (data->id == TPA6140A2)
	407	return snd_soc_add_controls(codec, tpa6140a2_controls,
	408	ARRAY_SIZE(tpa6140a2_controls));
	409	else
	410	return snd_soc_add_controls(codec, tpa6130a2_controls,
	411	ARRAY_SIZE(tpa6130a2_controls));
493b67ef PU	412
	413	}
	414	EXPORT_SYMBOL_GPL(tpa6130a2_add_controls);
	415
735fe4cf MB	416	static int __devinit tpa6130a2_probe(struct i2c_client *client,
735fe4cf MB	417	const struct i2c_device_id *id)
493b67ef PU	418	{
	419	struct device *dev;
	420	struct tpa6130a2_data *data;
	421	struct tpa6130a2_platform_data *pdata;
ad8332c1 JN	422	const char *regulator;
ad8332c1 JN	423	int ret;
493b67ef PU	424
	425	dev = &client->dev;
	426
	427	if (client->dev.platform_data == NULL) {
	428	dev_err(dev, "Platform data not set\n");
	429	dump_stack();
	430	return -ENODEV;
	431	}
	432
	433	data = kzalloc(sizeof(*data), GFP_KERNEL);
	434	if (data == NULL) {
	435	dev_err(dev, "Can not allocate memory\n");
	436	return -ENOMEM;
	437	}
	438
	439	tpa6130a2_client = client;
	440
	441	i2c_set_clientdata(tpa6130a2_client, data);
	442
ebab1b1d	443	pdata = client->dev.platform_data;
493b67ef	444	data->power_gpio = pdata->power_gpio;
e5e5b31e	445	data->id = pdata->id;
493b67ef PU	446
	447	mutex_init(&data->mutex);
	448
	449	/* Set default register values */
	450	data->regs[TPA6130A2_REG_CONTROL] = TPA6130A2_SWS;
	451	data->regs[TPA6130A2_REG_VOL_MUTE] = TPA6130A2_MUTE_R \|
	452	TPA6130A2_MUTE_L;
	453
	454	if (data->power_gpio >= 0) {
	455	ret = gpio_request(data->power_gpio, "tpa6130a2 enable");
	456	if (ret < 0) {
	457	dev_err(dev, "Failed to request power GPIO (%d)\n",
	458	data->power_gpio);
7c4e6492	459	goto err_gpio;
493b67ef PU	460	}
493b67ef PU	461	gpio_direction_output(data->power_gpio, 0);
493b67ef PU	462	}
493b67ef PU	463
e5e5b31e	464	switch (data->id) {
ad8332c1 JN	465	default:
	466	dev_warn(dev, "Unknown TPA model (%d). Assuming 6130A2\n",
	467	pdata->id);
2138301e	468	case TPA6130A2:
ad8332c1	469	regulator = "Vdd";
2138301e IK	470	break;
2138301e IK	471	case TPA6140A2:
ad8332c1	472	regulator = "AVdd";
2138301e	473	break;
2138301e	474	}
7c4e6492	475
ad8332c1 JN	476	data->supply = regulator_get(dev, regulator);
	477	if (IS_ERR(data->supply)) {
	478	ret = PTR_ERR(data->supply);
	479	dev_err(dev, "Failed to request supply: %d\n", ret);
7c4e6492 IK	480	goto err_regulator;
	481	}
	482
	483	ret = tpa6130a2_power(1);
	484	if (ret != 0)
	485	goto err_power;
	486
493b67ef PU	487
	488	/* Read version */
	489	ret = tpa6130a2_i2c_read(TPA6130A2_REG_VERSION) &
	490	TPA6130A2_VERSION_MASK;
	491	if ((ret != 1) && (ret != 2))
	492	dev_warn(dev, "UNTESTED version detected (%d)\n", ret);
	493
	494	/* Disable the chip */
7c4e6492 IK	495	ret = tpa6130a2_power(0);
	496	if (ret != 0)
	497	goto err_power;
493b67ef PU	498
493b67ef PU	499	return 0;
7c4e6492 IK	500
7c4e6492 IK	501	err_power:
ad8332c1	502	regulator_put(data->supply);
7c4e6492 IK	503	err_regulator:
	504	if (data->power_gpio >= 0)
	505	gpio_free(data->power_gpio);
	506	err_gpio:
493b67ef PU	507	kfree(data);
493b67ef PU	508	i2c_set_clientdata(tpa6130a2_client, NULL);
ebab1b1d	509	tpa6130a2_client = NULL;
493b67ef PU	510
	511	return ret;
	512	}
	513
735fe4cf	514	static int __devexit tpa6130a2_remove(struct i2c_client *client)
493b67ef PU	515	{
	516	struct tpa6130a2_data *data = i2c_get_clientdata(client);
	517
	518	tpa6130a2_power(0);
	519
	520	if (data->power_gpio >= 0)
	521	gpio_free(data->power_gpio);
7c4e6492	522
ad8332c1	523	regulator_put(data->supply);
7c4e6492	524
493b67ef	525	kfree(data);
ebab1b1d	526	tpa6130a2_client = NULL;
493b67ef PU	527
	528	return 0;
	529	}
	530
	531	static const struct i2c_device_id tpa6130a2_id[] = {
	532	{ "tpa6130a2", 0 },
	533	{ }
	534	};
	535	MODULE_DEVICE_TABLE(i2c, tpa6130a2_id);
	536
	537	static struct i2c_driver tpa6130a2_i2c_driver = {
	538	.driver = {
	539	.name = "tpa6130a2",
	540	.owner = THIS_MODULE,
	541	},
	542	.probe = tpa6130a2_probe,
	543	.remove = __devexit_p(tpa6130a2_remove),
	544	.id_table = tpa6130a2_id,
	545	};
	546
	547	static int __init tpa6130a2_init(void)
	548	{
	549	return i2c_add_driver(&tpa6130a2_i2c_driver);
	550	}
	551
	552	static void __exit tpa6130a2_exit(void)
	553	{
	554	i2c_del_driver(&tpa6130a2_i2c_driver);
	555	}
	556
	557	MODULE_AUTHOR("Peter Ujfalusi");
	558	MODULE_DESCRIPTION("TPA6130A2 Headphone amplifier driver");
	559	MODULE_LICENSE("GPL");
	560
	561	module_init(tpa6130a2_init);
	562	module_exit(tpa6130a2_exit);