[deliverable/linux.git] / drivers / input / misc / twl6040-vibra.c

/*
 * twl6040-vibra.c - TWL6040 Vibrator driver
 *
 * Author:      Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
 * Author:      Misael Lopez Cruz <misael.lopez@ti.com>
 *
 * Copyright:   (C) 2011 Texas Instruments, Inc.
 *
 * Based on twl4030-vibra.c by Henrik Saari <henrik.saari@nokia.com>
 *				Felipe Balbi <felipe.balbi@nokia.com>
 *				Jari Vanhala <ext-javi.vanhala@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/platform_device.h>
#include <linux/workqueue.h>
#include <linux/input.h>
#include <linux/mfd/twl6040.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>

#define EFFECT_DIR_180_DEG	0x8000

/* Recommended modulation index 85% */
#define TWL6040_VIBRA_MOD	85

#define TWL6040_NUM_SUPPLIES 2

struct vibra_info {
	struct device *dev;
	struct input_dev *input_dev;
	struct workqueue_struct *workqueue;
	struct work_struct play_work;
	struct mutex mutex;
	int irq;

	bool enabled;
	int weak_speed;
	int strong_speed;
	int direction;

	unsigned int vibldrv_res;
	unsigned int vibrdrv_res;
	unsigned int viblmotor_res;
	unsigned int vibrmotor_res;

	struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];

	struct twl6040 *twl6040;
};

static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
{
	struct vibra_info *info = data;
	struct twl6040 *twl6040 = info->twl6040;
	u8 status;

	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
	if (status & TWL6040_VIBLOCDET) {
		dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
		twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
				   TWL6040_VIBENA);
	}
	if (status & TWL6040_VIBROCDET) {
		dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
		twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
				   TWL6040_VIBENA);
	}

	return IRQ_HANDLED;
}

static void twl6040_vibra_enable(struct vibra_info *info)
{
	struct twl6040 *twl6040 = info->twl6040;
	int ret;

	ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
	if (ret) {
		dev_err(info->dev, "failed to enable regulators %d\n", ret);
		return;
	}

	twl6040_power(info->twl6040, 1);
	if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) {
		/*
		 * ERRATA: Disable overcurrent protection for at least
		 * 3ms when enabling vibrator drivers to avoid false
		 * overcurrent detection
		 */
		twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
				  TWL6040_VIBENA | TWL6040_VIBCTRL);
		twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
				  TWL6040_VIBENA | TWL6040_VIBCTRL);
		usleep_range(3000, 3500);
	}

	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
			  TWL6040_VIBENA);
	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
			  TWL6040_VIBENA);

	info->enabled = true;
}

static void twl6040_vibra_disable(struct vibra_info *info)
{
	struct twl6040 *twl6040 = info->twl6040;

	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
	twl6040_power(info->twl6040, 0);

	regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);

	info->enabled = false;
}

static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
			     int speed, int direction)
{
	int vpk, max_code;
	u8 vibdat;

	/* output swing */
	vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
		(100 * (vibdrv_res + motor_res));

	/* 50mV per VIBDAT code step */
	max_code = vpk / 50;
	if (max_code > TWL6040_VIBDAT_MAX)
		max_code = TWL6040_VIBDAT_MAX;

	/* scale speed to max allowed code */
	vibdat = (u8)((speed * max_code) / USHRT_MAX);

	/* 2's complement for direction > 180 degrees */
	vibdat *= direction;

	return vibdat;
}

static void twl6040_vibra_set_effect(struct vibra_info *info)
{
	struct twl6040 *twl6040 = info->twl6040;
	u8 vibdatl, vibdatr;
	int volt;

	/* weak motor */
	volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
	vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
				     info->viblmotor_res,
				     info->weak_speed, info->direction);

	/* strong motor */
	volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
	vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
				     info->vibrmotor_res,
				     info->strong_speed, info->direction);

	twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
	twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
}

static void vibra_play_work(struct work_struct *work)
{
	struct vibra_info *info = container_of(work,
				struct vibra_info, play_work);

	mutex_lock(&info->mutex);

	if (info->weak_speed || info->strong_speed) {
		if (!info->enabled)
			twl6040_vibra_enable(info);

		twl6040_vibra_set_effect(info);
	} else if (info->enabled)
		twl6040_vibra_disable(info);

	mutex_unlock(&info->mutex);
}

static int vibra_play(struct input_dev *input, void *data,
		      struct ff_effect *effect)
{
	struct vibra_info *info = input_get_drvdata(input);
	int ret;

	/* Do not allow effect, while the routing is set to use audio */
	ret = twl6040_get_vibralr_status(info->twl6040);
	if (ret & TWL6040_VIBSEL) {
		dev_info(&input->dev, "Vibra is configured for audio\n");
		return -EBUSY;
	}

	info->weak_speed = effect->u.rumble.weak_magnitude;
	info->strong_speed = effect->u.rumble.strong_magnitude;
	info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;

	ret = queue_work(info->workqueue, &info->play_work);
	if (!ret) {
		dev_info(&input->dev, "work is already on queue\n");
		return ret;
	}

	return 0;
}

static void twl6040_vibra_close(struct input_dev *input)
{
	struct vibra_info *info = input_get_drvdata(input);

	cancel_work_sync(&info->play_work);

	mutex_lock(&info->mutex);

	if (info->enabled)
		twl6040_vibra_disable(info);

	mutex_unlock(&info->mutex);
}

#ifdef CONFIG_PM_SLEEP
static int twl6040_vibra_suspend(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct vibra_info *info = platform_get_drvdata(pdev);

	mutex_lock(&info->mutex);

	if (info->enabled)
		twl6040_vibra_disable(info);

	mutex_unlock(&info->mutex);

	return 0;
}

#endif

static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);

static int __devinit twl6040_vibra_probe(struct platform_device *pdev)
{
	struct twl6040_vibra_data *pdata = pdev->dev.platform_data;
	struct vibra_info *info;
	int ret;

	if (!pdata) {
		dev_err(&pdev->dev, "platform_data not available\n");
		return -EINVAL;
	}

	info = kzalloc(sizeof(*info), GFP_KERNEL);
	if (!info) {
		dev_err(&pdev->dev, "couldn't allocate memory\n");
		return -ENOMEM;
	}

	info->dev = &pdev->dev;
	info->twl6040 = dev_get_drvdata(pdev->dev.parent);
	info->vibldrv_res = pdata->vibldrv_res;
	info->vibrdrv_res = pdata->vibrdrv_res;
	info->viblmotor_res = pdata->viblmotor_res;
	info->vibrmotor_res = pdata->vibrmotor_res;
	if ((!info->vibldrv_res && !info->viblmotor_res) ||
	    (!info->vibrdrv_res && !info->vibrmotor_res)) {
		dev_err(info->dev, "invalid vibra driver/motor resistance\n");
		ret = -EINVAL;
		goto err_kzalloc;
	}

	info->irq = platform_get_irq(pdev, 0);
	if (info->irq < 0) {
		dev_err(info->dev, "invalid irq\n");
		ret = -EINVAL;
		goto err_kzalloc;
	}

	mutex_init(&info->mutex);

	info->input_dev = input_allocate_device();
	if (info->input_dev == NULL) {
		dev_err(info->dev, "couldn't allocate input device\n");
		ret = -ENOMEM;
		goto err_kzalloc;
	}

	input_set_drvdata(info->input_dev, info);

	info->input_dev->name = "twl6040:vibrator";
	info->input_dev->id.version = 1;
	info->input_dev->dev.parent = pdev->dev.parent;
	info->input_dev->close = twl6040_vibra_close;
	__set_bit(FF_RUMBLE, info->input_dev->ffbit);

	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
	if (ret < 0) {
		dev_err(info->dev, "couldn't register vibrator to FF\n");
		goto err_ialloc;
	}

	ret = input_register_device(info->input_dev);
	if (ret < 0) {
		dev_err(info->dev, "couldn't register input device\n");
		goto err_iff;
	}

	platform_set_drvdata(pdev, info);

	ret = request_threaded_irq(info->irq, NULL, twl6040_vib_irq_handler, 0,
				   "twl6040_irq_vib", info);
	if (ret) {
		dev_err(info->dev, "VIB IRQ request failed: %d\n", ret);
		goto err_irq;
	}

	info->supplies[0].supply = "vddvibl";
	info->supplies[1].supply = "vddvibr";
	ret = regulator_bulk_get(info->dev, ARRAY_SIZE(info->supplies),
				 info->supplies);
	if (ret) {
		dev_err(info->dev, "couldn't get regulators %d\n", ret);
		goto err_regulator;
	}

	if (pdata->vddvibl_uV) {
		ret = regulator_set_voltage(info->supplies[0].consumer,
					    pdata->vddvibl_uV,
					    pdata->vddvibl_uV);
		if (ret) {
			dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
				ret);
			goto err_voltage;
		}
	}

	if (pdata->vddvibr_uV) {
		ret = regulator_set_voltage(info->supplies[1].consumer,
					    pdata->vddvibr_uV,
					    pdata->vddvibr_uV);
		if (ret) {
			dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
				ret);
			goto err_voltage;
		}
	}

	info->workqueue = alloc_workqueue("twl6040-vibra", 0, 0);
	if (info->workqueue == NULL) {
		dev_err(info->dev, "couldn't create workqueue\n");
		ret = -ENOMEM;
		goto err_voltage;
	}
	INIT_WORK(&info->play_work, vibra_play_work);

	return 0;

err_voltage:
	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
err_regulator:
	free_irq(info->irq, info);
err_irq:
	input_unregister_device(info->input_dev);
	info->input_dev = NULL;
err_iff:
	if (info->input_dev)
		input_ff_destroy(info->input_dev);
err_ialloc:
	input_free_device(info->input_dev);
err_kzalloc:
	kfree(info);
	return ret;
}

static int __devexit twl6040_vibra_remove(struct platform_device *pdev)
{
	struct vibra_info *info = platform_get_drvdata(pdev);

	input_unregister_device(info->input_dev);
	free_irq(info->irq, info);
	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
	destroy_workqueue(info->workqueue);
	kfree(info);

	return 0;
}

static struct platform_driver twl6040_vibra_driver = {
	.probe		= twl6040_vibra_probe,
	.remove		= __devexit_p(twl6040_vibra_remove),
	.driver		= {
		.name	= "twl6040-vibra",
		.owner	= THIS_MODULE,
		.pm	= &twl6040_vibra_pm_ops,
	},
};
module_platform_driver(twl6040_vibra_driver);

MODULE_ALIAS("platform:twl6040-vibra");
MODULE_DESCRIPTION("TWL6040 Vibra driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
Commit	Line	Data
cc697d38 MLC	1	/*
	2	* twl6040-vibra.c - TWL6040 Vibrator driver
	3	*
	4	* Author: Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
	5	* Author: Misael Lopez Cruz <misael.lopez@ti.com>
	6	*
	7	* Copyright: (C) 2011 Texas Instruments, Inc.
	8	*
	9	* Based on twl4030-vibra.c by Henrik Saari <henrik.saari@nokia.com>
	10	* Felipe Balbi <felipe.balbi@nokia.com>
	11	* Jari Vanhala <ext-javi.vanhala@nokia.com>
	12	*
	13	* This program is free software; you can redistribute it and/or modify
	14	* it under the terms of the GNU General Public License version 2 as
	15	* published by the Free Software Foundation.
	16	*
	17	* This program is distributed in the hope that it will be useful, but
	18	* WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	20	* General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, write to the Free Software
	24	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	25	* 02110-1301 USA
	26	*
	27	*/
	28	#include <linux/module.h>
	29	#include <linux/platform_device.h>
	30	#include <linux/workqueue.h>
8eaeb939	31	#include <linux/input.h>
cc697d38 MLC	32	#include <linux/mfd/twl6040.h>
	33	#include <linux/slab.h>
	34	#include <linux/delay.h>
	35	#include <linux/regulator/consumer.h>
	36
	37	#define EFFECT_DIR_180_DEG 0x8000
	38
	39	/* Recommended modulation index 85% */
	40	#define TWL6040_VIBRA_MOD 85
	41
	42	#define TWL6040_NUM_SUPPLIES 2
	43
	44	struct vibra_info {
	45	struct device *dev;
	46	struct input_dev *input_dev;
	47	struct workqueue_struct *workqueue;
	48	struct work_struct play_work;
	49	struct mutex mutex;
625cbe46	50	int irq;
cc697d38 MLC	51
	52	bool enabled;
	53	int weak_speed;
	54	int strong_speed;
	55	int direction;
	56
	57	unsigned int vibldrv_res;
	58	unsigned int vibrdrv_res;
	59	unsigned int viblmotor_res;
	60	unsigned int vibrmotor_res;
	61
	62	struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];
	63
	64	struct twl6040 *twl6040;
	65	};
	66
	67	static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
	68	{
	69	struct vibra_info *info = data;
	70	struct twl6040 *twl6040 = info->twl6040;
	71	u8 status;
	72
	73	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
	74	if (status & TWL6040_VIBLOCDET) {
	75	dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
	76	twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
1e036f65	77	TWL6040_VIBENA);
cc697d38 MLC	78	}
	79	if (status & TWL6040_VIBROCDET) {
	80	dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
	81	twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
1e036f65	82	TWL6040_VIBENA);
cc697d38 MLC	83	}
	84
	85	return IRQ_HANDLED;
	86	}
	87
	88	static void twl6040_vibra_enable(struct vibra_info *info)
	89	{
	90	struct twl6040 *twl6040 = info->twl6040;
	91	int ret;
	92
	93	ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
	94	if (ret) {
	95	dev_err(info->dev, "failed to enable regulators %d\n", ret);
	96	return;
	97	}
	98
	99	twl6040_power(info->twl6040, 1);
7e968985	100	if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) {
cc697d38 MLC	101	/*
	102	* ERRATA: Disable overcurrent protection for at least
	103	* 3ms when enabling vibrator drivers to avoid false
	104	* overcurrent detection
	105	*/
	106	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
1e036f65	107	TWL6040_VIBENA \| TWL6040_VIBCTRL);
cc697d38	108	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
1e036f65	109	TWL6040_VIBENA \| TWL6040_VIBCTRL);
cc697d38 MLC	110	usleep_range(3000, 3500);
	111	}
	112
	113	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
1e036f65	114	TWL6040_VIBENA);
cc697d38	115	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
1e036f65	116	TWL6040_VIBENA);
cc697d38 MLC	117
	118	info->enabled = true;
	119	}
	120
	121	static void twl6040_vibra_disable(struct vibra_info *info)
	122	{
	123	struct twl6040 *twl6040 = info->twl6040;
	124
	125	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
	126	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
	127	twl6040_power(info->twl6040, 0);
	128
	129	regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);
	130
	131	info->enabled = false;
	132	}
	133
	134	static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
	135	int speed, int direction)
	136	{
	137	int vpk, max_code;
	138	u8 vibdat;
	139
	140	/* output swing */
	141	vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
	142	(100 * (vibdrv_res + motor_res));
	143
	144	/* 50mV per VIBDAT code step */
	145	max_code = vpk / 50;
	146	if (max_code > TWL6040_VIBDAT_MAX)
	147	max_code = TWL6040_VIBDAT_MAX;
	148
	149	/* scale speed to max allowed code */
	150	vibdat = (u8)((speed * max_code) / USHRT_MAX);
	151
	152	/* 2's complement for direction > 180 degrees */
	153	vibdat *= direction;
	154
	155	return vibdat;
	156	}
	157
	158	static void twl6040_vibra_set_effect(struct vibra_info *info)
	159	{
	160	struct twl6040 *twl6040 = info->twl6040;
	161	u8 vibdatl, vibdatr;
	162	int volt;
	163
	164	/* weak motor */
	165	volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
	166	vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
	167	info->viblmotor_res,
	168	info->weak_speed, info->direction);
	169
	170	/* strong motor */
	171	volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
	172	vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
	173	info->vibrmotor_res,
	174	info->strong_speed, info->direction);
	175
	176	twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
	177	twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
	178	}
	179
	180	static void vibra_play_work(struct work_struct *work)
181	{
182	struct vibra_info *info = container_of(work,
183	struct vibra_info, play_work);
184
185	mutex_lock(&info->mutex);
186
187	if (info->weak_speed \|\| info->strong_speed) {
188	if (!info->enabled)
189	twl6040_vibra_enable(info);
190
191	twl6040_vibra_set_effect(info);
192	} else if (info->enabled)
193	twl6040_vibra_disable(info);
194
195	mutex_unlock(&info->mutex);
196	}
197
198	static int vibra_play(struct input_dev input, void data,
199	struct ff_effect *effect)
200	{
201	struct vibra_info *info = input_get_drvdata(input);
202	int ret;
203
5f07c32e PU	204	/* Do not allow effect, while the routing is set to use audio */
	205	ret = twl6040_get_vibralr_status(info->twl6040);
	206	if (ret & TWL6040_VIBSEL) {
	207	dev_info(&input->dev, "Vibra is configured for audio\n");
	208	return -EBUSY;
	209	}
	210
cc697d38 MLC	211	info->weak_speed = effect->u.rumble.weak_magnitude;
	212	info->strong_speed = effect->u.rumble.strong_magnitude;
	213	info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;
	214
	215	ret = queue_work(info->workqueue, &info->play_work);
	216	if (!ret) {
	217	dev_info(&input->dev, "work is already on queue\n");
	218	return ret;
	219	}
	220
	221	return 0;
	222	}
	223
	224	static void twl6040_vibra_close(struct input_dev *input)
	225	{
	226	struct vibra_info *info = input_get_drvdata(input);
	227
	228	cancel_work_sync(&info->play_work);
	229
	230	mutex_lock(&info->mutex);
	231
	232	if (info->enabled)
	233	twl6040_vibra_disable(info);
	234
	235	mutex_unlock(&info->mutex);
	236	}
	237
b6b1e927	238	#ifdef CONFIG_PM_SLEEP
cc697d38 MLC	239	static int twl6040_vibra_suspend(struct device *dev)
	240	{
	241	struct platform_device *pdev = to_platform_device(dev);
	242	struct vibra_info *info = platform_get_drvdata(pdev);
	243
	244	mutex_lock(&info->mutex);
	245
	246	if (info->enabled)
	247	twl6040_vibra_disable(info);
	248
	249	mutex_unlock(&info->mutex);
	250
	251	return 0;
	252	}
	253
	254	#endif
	255
	256	static SIMPLE_DEV_PM_OPS(twl6040_vibra_pm_ops, twl6040_vibra_suspend, NULL);
	257
	258	static int __devinit twl6040_vibra_probe(struct platform_device *pdev)
	259	{
8eaeb939	260	struct twl6040_vibra_data *pdata = pdev->dev.platform_data;
cc697d38 MLC	261	struct vibra_info *info;
	262	int ret;
	263
	264	if (!pdata) {
	265	dev_err(&pdev->dev, "platform_data not available\n");
	266	return -EINVAL;
	267	}
	268
	269	info = kzalloc(sizeof(*info), GFP_KERNEL);
	270	if (!info) {
	271	dev_err(&pdev->dev, "couldn't allocate memory\n");
	272	return -ENOMEM;
	273	}
	274
	275	info->dev = &pdev->dev;
	276	info->twl6040 = dev_get_drvdata(pdev->dev.parent);
	277	info->vibldrv_res = pdata->vibldrv_res;
	278	info->vibrdrv_res = pdata->vibrdrv_res;
	279	info->viblmotor_res = pdata->viblmotor_res;
	280	info->vibrmotor_res = pdata->vibrmotor_res;
	281	if ((!info->vibldrv_res && !info->viblmotor_res) \|\|
	282	(!info->vibrdrv_res && !info->vibrmotor_res)) {
	283	dev_err(info->dev, "invalid vibra driver/motor resistance\n");
	284	ret = -EINVAL;
	285	goto err_kzalloc;
	286	}
	287
625cbe46 PU	288	info->irq = platform_get_irq(pdev, 0);
	289	if (info->irq < 0) {
	290	dev_err(info->dev, "invalid irq\n");
	291	ret = -EINVAL;
	292	goto err_kzalloc;
	293	}
	294
cc697d38 MLC	295	mutex_init(&info->mutex);
	296
	297	info->input_dev = input_allocate_device();
	298	if (info->input_dev == NULL) {
	299	dev_err(info->dev, "couldn't allocate input device\n");
	300	ret = -ENOMEM;
	301	goto err_kzalloc;
	302	}
	303
	304	input_set_drvdata(info->input_dev, info);
	305
	306	info->input_dev->name = "twl6040:vibrator";
	307	info->input_dev->id.version = 1;
	308	info->input_dev->dev.parent = pdev->dev.parent;
	309	info->input_dev->close = twl6040_vibra_close;
	310	__set_bit(FF_RUMBLE, info->input_dev->ffbit);
	311
	312	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
	313	if (ret < 0) {
	314	dev_err(info->dev, "couldn't register vibrator to FF\n");
	315	goto err_ialloc;
	316	}
	317
	318	ret = input_register_device(info->input_dev);
	319	if (ret < 0) {
	320	dev_err(info->dev, "couldn't register input device\n");
	321	goto err_iff;
	322	}
	323
	324	platform_set_drvdata(pdev, info);
	325
625cbe46 PU	326	ret = request_threaded_irq(info->irq, NULL, twl6040_vib_irq_handler, 0,
625cbe46 PU	327	"twl6040_irq_vib", info);
cc697d38 MLC	328	if (ret) {
	329	dev_err(info->dev, "VIB IRQ request failed: %d\n", ret);
	330	goto err_irq;
	331	}
	332
	333	info->supplies[0].supply = "vddvibl";
	334	info->supplies[1].supply = "vddvibr";
	335	ret = regulator_bulk_get(info->dev, ARRAY_SIZE(info->supplies),
	336	info->supplies);
	337	if (ret) {
	338	dev_err(info->dev, "couldn't get regulators %d\n", ret);
	339	goto err_regulator;
	340	}
	341
	342	if (pdata->vddvibl_uV) {
	343	ret = regulator_set_voltage(info->supplies[0].consumer,
	344	pdata->vddvibl_uV,
	345	pdata->vddvibl_uV);
	346	if (ret) {
	347	dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
	348	ret);
	349	goto err_voltage;
	350	}
	351	}
	352
	353	if (pdata->vddvibr_uV) {
	354	ret = regulator_set_voltage(info->supplies[1].consumer,
	355	pdata->vddvibr_uV,
	356	pdata->vddvibr_uV);
	357	if (ret) {
	358	dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
	359	ret);
	360	goto err_voltage;
	361	}
	362	}
	363
	364	info->workqueue = alloc_workqueue("twl6040-vibra", 0, 0);
	365	if (info->workqueue == NULL) {
	366	dev_err(info->dev, "couldn't create workqueue\n");
	367	ret = -ENOMEM;
	368	goto err_voltage;
	369	}
	370	INIT_WORK(&info->play_work, vibra_play_work);
	371
	372	return 0;
	373
	374	err_voltage:
	375	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
	376	err_regulator:
625cbe46	377	free_irq(info->irq, info);
cc697d38 MLC	378	err_irq:
	379	input_unregister_device(info->input_dev);
	380	info->input_dev = NULL;
	381	err_iff:
	382	if (info->input_dev)
	383	input_ff_destroy(info->input_dev);
	384	err_ialloc:
	385	input_free_device(info->input_dev);
	386	err_kzalloc:
	387	kfree(info);
	388	return ret;
	389	}
	390
	391	static int __devexit twl6040_vibra_remove(struct platform_device *pdev)
	392	{
	393	struct vibra_info *info = platform_get_drvdata(pdev);
	394
	395	input_unregister_device(info->input_dev);
625cbe46	396	free_irq(info->irq, info);
cc697d38 MLC	397	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
	398	destroy_workqueue(info->workqueue);
	399	kfree(info);
	400
	401	return 0;
	402	}
	403
	404	static struct platform_driver twl6040_vibra_driver = {
	405	.probe = twl6040_vibra_probe,
	406	.remove = __devexit_p(twl6040_vibra_remove),
	407	.driver = {
	408	.name = "twl6040-vibra",
	409	.owner = THIS_MODULE,
	410	.pm = &twl6040_vibra_pm_ops,
	411	},
	412	};
840a746b	413	module_platform_driver(twl6040_vibra_driver);
cc697d38 MLC	414
	415	MODULE_ALIAS("platform:twl6040-vibra");
	416	MODULE_DESCRIPTION("TWL6040 Vibra driver");
	417	MODULE_LICENSE("GPL");
	418	MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
	419	MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");