[mirror_ubuntu-jammy-kernel.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/of.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 device *twl6040_core_dev = pdev->dev.parent;
	struct device_node *twl6040_core_node = NULL;
	struct vibra_info *info;
	int vddvibl_uV = 0;
	int vddvibr_uV = 0;
	int ret;

#ifdef CONFIG_OF
	twl6040_core_node = of_find_node_by_name(twl6040_core_dev->of_node,
						 "vibra");
#endif

	if (!pdata && !twl6040_core_node) {
		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);
	if (pdata) {
		info->vibldrv_res = pdata->vibldrv_res;
		info->vibrdrv_res = pdata->vibrdrv_res;
		info->viblmotor_res = pdata->viblmotor_res;
		info->vibrmotor_res = pdata->vibrmotor_res;
		vddvibl_uV = pdata->vddvibl_uV;
		vddvibr_uV = pdata->vddvibr_uV;
	} else {
		of_property_read_u32(twl6040_core_node, "ti,vibldrv-res",
				     &info->vibldrv_res);
		of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res",
				     &info->vibrdrv_res);
		of_property_read_u32(twl6040_core_node, "ti,viblmotor-res",
				     &info->viblmotor_res);
		of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res",
				     &info->vibrmotor_res);
		of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV",
				     &vddvibl_uV);
		of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV",
				     &vddvibr_uV);
	}

	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";
	/*
	 * When booted with Device tree the regulators are attached to the
	 * parent device (twl6040 MFD core)
	 */
	ret = regulator_bulk_get(pdata ? info->dev : twl6040_core_dev,
				 ARRAY_SIZE(info->supplies), info->supplies);
	if (ret) {
		dev_err(info->dev, "couldn't get regulators %d\n", ret);
		goto err_regulator;
	}

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

	if (vddvibr_uV) {
		ret = regulator_set_voltage(info->supplies[1].consumer,
					    vddvibr_uV, 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		= 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>
9ac7b1a3	30	#include <linux/of.h>
cc697d38	31	#include <linux/workqueue.h>
8eaeb939	32	#include <linux/input.h>
cc697d38 MLC	33	#include <linux/mfd/twl6040.h>
	34	#include <linux/slab.h>
	35	#include <linux/delay.h>
	36	#include <linux/regulator/consumer.h>
	37
	38	#define EFFECT_DIR_180_DEG 0x8000
	39
	40	/* Recommended modulation index 85% */
	41	#define TWL6040_VIBRA_MOD 85
	42
	43	#define TWL6040_NUM_SUPPLIES 2
	44
	45	struct vibra_info {
	46	struct device *dev;
	47	struct input_dev *input_dev;
	48	struct workqueue_struct *workqueue;
	49	struct work_struct play_work;
	50	struct mutex mutex;
625cbe46	51	int irq;
cc697d38 MLC	52
	53	bool enabled;
	54	int weak_speed;
	55	int strong_speed;
	56	int direction;
	57
	58	unsigned int vibldrv_res;
	59	unsigned int vibrdrv_res;
	60	unsigned int viblmotor_res;
	61	unsigned int vibrmotor_res;
	62
	63	struct regulator_bulk_data supplies[TWL6040_NUM_SUPPLIES];
	64
	65	struct twl6040 *twl6040;
	66	};
	67
	68	static irqreturn_t twl6040_vib_irq_handler(int irq, void *data)
	69	{
	70	struct vibra_info *info = data;
	71	struct twl6040 *twl6040 = info->twl6040;
	72	u8 status;
	73
	74	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
	75	if (status & TWL6040_VIBLOCDET) {
	76	dev_warn(info->dev, "Left Vibrator overcurrent detected\n");
	77	twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLL,
1e036f65	78	TWL6040_VIBENA);
cc697d38 MLC	79	}
	80	if (status & TWL6040_VIBROCDET) {
	81	dev_warn(info->dev, "Right Vibrator overcurrent detected\n");
	82	twl6040_clear_bits(twl6040, TWL6040_REG_VIBCTLR,
1e036f65	83	TWL6040_VIBENA);
cc697d38 MLC	84	}
	85
	86	return IRQ_HANDLED;
	87	}
	88
	89	static void twl6040_vibra_enable(struct vibra_info *info)
	90	{
	91	struct twl6040 *twl6040 = info->twl6040;
	92	int ret;
	93
	94	ret = regulator_bulk_enable(ARRAY_SIZE(info->supplies), info->supplies);
	95	if (ret) {
	96	dev_err(info->dev, "failed to enable regulators %d\n", ret);
	97	return;
	98	}
	99
	100	twl6040_power(info->twl6040, 1);
7e968985	101	if (twl6040_get_revid(twl6040) <= TWL6040_REV_ES1_1) {
cc697d38 MLC	102	/*
	103	* ERRATA: Disable overcurrent protection for at least
	104	* 3ms when enabling vibrator drivers to avoid false
	105	* overcurrent detection
	106	*/
	107	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
1e036f65	108	TWL6040_VIBENA \| TWL6040_VIBCTRL);
cc697d38	109	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
1e036f65	110	TWL6040_VIBENA \| TWL6040_VIBCTRL);
cc697d38 MLC	111	usleep_range(3000, 3500);
	112	}
	113
	114	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL,
1e036f65	115	TWL6040_VIBENA);
cc697d38	116	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR,
1e036f65	117	TWL6040_VIBENA);
cc697d38 MLC	118
	119	info->enabled = true;
	120	}
	121
	122	static void twl6040_vibra_disable(struct vibra_info *info)
	123	{
	124	struct twl6040 *twl6040 = info->twl6040;
	125
	126	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLL, 0x00);
	127	twl6040_reg_write(twl6040, TWL6040_REG_VIBCTLR, 0x00);
	128	twl6040_power(info->twl6040, 0);
	129
	130	regulator_bulk_disable(ARRAY_SIZE(info->supplies), info->supplies);
	131
	132	info->enabled = false;
	133	}
	134
	135	static u8 twl6040_vibra_code(int vddvib, int vibdrv_res, int motor_res,
	136	int speed, int direction)
	137	{
	138	int vpk, max_code;
	139	u8 vibdat;
	140
	141	/* output swing */
	142	vpk = (vddvib * motor_res * TWL6040_VIBRA_MOD) /
	143	(100 * (vibdrv_res + motor_res));
	144
	145	/* 50mV per VIBDAT code step */
	146	max_code = vpk / 50;
	147	if (max_code > TWL6040_VIBDAT_MAX)
	148	max_code = TWL6040_VIBDAT_MAX;
	149
	150	/* scale speed to max allowed code */
	151	vibdat = (u8)((speed * max_code) / USHRT_MAX);
	152
	153	/* 2's complement for direction > 180 degrees */
	154	vibdat *= direction;
	155
	156	return vibdat;
	157	}
	158
	159	static void twl6040_vibra_set_effect(struct vibra_info *info)
	160	{
	161	struct twl6040 *twl6040 = info->twl6040;
	162	u8 vibdatl, vibdatr;
	163	int volt;
	164
	165	/* weak motor */
	166	volt = regulator_get_voltage(info->supplies[0].consumer) / 1000;
	167	vibdatl = twl6040_vibra_code(volt, info->vibldrv_res,
	168	info->viblmotor_res,
	169	info->weak_speed, info->direction);
	170
	171	/* strong motor */
	172	volt = regulator_get_voltage(info->supplies[1].consumer) / 1000;
	173	vibdatr = twl6040_vibra_code(volt, info->vibrdrv_res,
	174	info->vibrmotor_res,
	175	info->strong_speed, info->direction);
	176
	177	twl6040_reg_write(twl6040, TWL6040_REG_VIBDATL, vibdatl);
	178	twl6040_reg_write(twl6040, TWL6040_REG_VIBDATR, vibdatr);
	179	}
	180
	181	static void vibra_play_work(struct work_struct *work)
182	{
183	struct vibra_info *info = container_of(work,
184	struct vibra_info, play_work);
185
186	mutex_lock(&info->mutex);
187
188	if (info->weak_speed \|\| info->strong_speed) {
189	if (!info->enabled)
190	twl6040_vibra_enable(info);
191
192	twl6040_vibra_set_effect(info);
193	} else if (info->enabled)
194	twl6040_vibra_disable(info);
195
196	mutex_unlock(&info->mutex);
197	}
198
199	static int vibra_play(struct input_dev input, void data,
200	struct ff_effect *effect)
201	{
202	struct vibra_info *info = input_get_drvdata(input);
203	int ret;
204
5f07c32e PU	205	/* Do not allow effect, while the routing is set to use audio */
	206	ret = twl6040_get_vibralr_status(info->twl6040);
	207	if (ret & TWL6040_VIBSEL) {
	208	dev_info(&input->dev, "Vibra is configured for audio\n");
	209	return -EBUSY;
	210	}
	211
cc697d38 MLC	212	info->weak_speed = effect->u.rumble.weak_magnitude;
	213	info->strong_speed = effect->u.rumble.strong_magnitude;
	214	info->direction = effect->direction < EFFECT_DIR_180_DEG ? 1 : -1;
	215
	216	ret = queue_work(info->workqueue, &info->play_work);
	217	if (!ret) {
	218	dev_info(&input->dev, "work is already on queue\n");
	219	return ret;
	220	}
	221
	222	return 0;
	223	}
	224
	225	static void twl6040_vibra_close(struct input_dev *input)
	226	{
	227	struct vibra_info *info = input_get_drvdata(input);
	228
	229	cancel_work_sync(&info->play_work);
	230
	231	mutex_lock(&info->mutex);
	232
	233	if (info->enabled)
	234	twl6040_vibra_disable(info);
	235
	236	mutex_unlock(&info->mutex);
	237	}
	238
b6b1e927	239	#ifdef CONFIG_PM_SLEEP
cc697d38 MLC	240	static int twl6040_vibra_suspend(struct device *dev)
	241	{
	242	struct platform_device *pdev = to_platform_device(dev);
	243	struct vibra_info *info = platform_get_drvdata(pdev);
	244
	245	mutex_lock(&info->mutex);
	246
	247	if (info->enabled)
	248	twl6040_vibra_disable(info);
	249
	250	mutex_unlock(&info->mutex);
	251
	252	return 0;
	253	}
cc697d38 MLC	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;
e7ec014a PU	261	struct device *twl6040_core_dev = pdev->dev.parent;
e7ec014a PU	262	struct device_node *twl6040_core_node = NULL;
cc697d38	263	struct vibra_info *info;
9ac7b1a3 PU	264	int vddvibl_uV = 0;
9ac7b1a3 PU	265	int vddvibr_uV = 0;
cc697d38 MLC	266	int ret;
cc697d38 MLC	267
e7ec014a PU	268	#ifdef CONFIG_OF
	269	twl6040_core_node = of_find_node_by_name(twl6040_core_dev->of_node,
	270	"vibra");
	271	#endif
	272
	273	if (!pdata && !twl6040_core_node) {
cc697d38 MLC	274	dev_err(&pdev->dev, "platform_data not available\n");
	275	return -EINVAL;
	276	}
	277
	278	info = kzalloc(sizeof(*info), GFP_KERNEL);
	279	if (!info) {
	280	dev_err(&pdev->dev, "couldn't allocate memory\n");
	281	return -ENOMEM;
	282	}
	283
	284	info->dev = &pdev->dev;
9ac7b1a3	285
cc697d38	286	info->twl6040 = dev_get_drvdata(pdev->dev.parent);
9ac7b1a3 PU	287	if (pdata) {
	288	info->vibldrv_res = pdata->vibldrv_res;
	289	info->vibrdrv_res = pdata->vibrdrv_res;
	290	info->viblmotor_res = pdata->viblmotor_res;
	291	info->vibrmotor_res = pdata->vibrmotor_res;
	292	vddvibl_uV = pdata->vddvibl_uV;
	293	vddvibr_uV = pdata->vddvibr_uV;
	294	} else {
e7ec014a PU	295	of_property_read_u32(twl6040_core_node, "ti,vibldrv-res",
	296	&info->vibldrv_res);
	297	of_property_read_u32(twl6040_core_node, "ti,vibrdrv-res",
	298	&info->vibrdrv_res);
	299	of_property_read_u32(twl6040_core_node, "ti,viblmotor-res",
9ac7b1a3	300	&info->viblmotor_res);
e7ec014a	301	of_property_read_u32(twl6040_core_node, "ti,vibrmotor-res",
9ac7b1a3	302	&info->vibrmotor_res);
e7ec014a PU	303	of_property_read_u32(twl6040_core_node, "ti,vddvibl-uV",
	304	&vddvibl_uV);
	305	of_property_read_u32(twl6040_core_node, "ti,vddvibr-uV",
	306	&vddvibr_uV);
9ac7b1a3 PU	307	}
9ac7b1a3 PU	308
cc697d38 MLC	309	if ((!info->vibldrv_res && !info->viblmotor_res) \|\|
	310	(!info->vibrdrv_res && !info->vibrmotor_res)) {
	311	dev_err(info->dev, "invalid vibra driver/motor resistance\n");
	312	ret = -EINVAL;
	313	goto err_kzalloc;
	314	}
	315
625cbe46 PU	316	info->irq = platform_get_irq(pdev, 0);
	317	if (info->irq < 0) {
	318	dev_err(info->dev, "invalid irq\n");
	319	ret = -EINVAL;
	320	goto err_kzalloc;
	321	}
	322
cc697d38 MLC	323	mutex_init(&info->mutex);
	324
	325	info->input_dev = input_allocate_device();
	326	if (info->input_dev == NULL) {
	327	dev_err(info->dev, "couldn't allocate input device\n");
	328	ret = -ENOMEM;
	329	goto err_kzalloc;
	330	}
	331
	332	input_set_drvdata(info->input_dev, info);
	333
	334	info->input_dev->name = "twl6040:vibrator";
	335	info->input_dev->id.version = 1;
	336	info->input_dev->dev.parent = pdev->dev.parent;
	337	info->input_dev->close = twl6040_vibra_close;
	338	__set_bit(FF_RUMBLE, info->input_dev->ffbit);
	339
	340	ret = input_ff_create_memless(info->input_dev, NULL, vibra_play);
	341	if (ret < 0) {
	342	dev_err(info->dev, "couldn't register vibrator to FF\n");
	343	goto err_ialloc;
	344	}
	345
	346	ret = input_register_device(info->input_dev);
	347	if (ret < 0) {
	348	dev_err(info->dev, "couldn't register input device\n");
	349	goto err_iff;
	350	}
	351
	352	platform_set_drvdata(pdev, info);
	353
625cbe46 PU	354	ret = request_threaded_irq(info->irq, NULL, twl6040_vib_irq_handler, 0,
625cbe46 PU	355	"twl6040_irq_vib", info);
cc697d38 MLC	356	if (ret) {
	357	dev_err(info->dev, "VIB IRQ request failed: %d\n", ret);
	358	goto err_irq;
	359	}
	360
	361	info->supplies[0].supply = "vddvibl";
	362	info->supplies[1].supply = "vddvibr";
e7ec014a PU	363	/*
	364	* When booted with Device tree the regulators are attached to the
	365	* parent device (twl6040 MFD core)
	366	*/
	367	ret = regulator_bulk_get(pdata ? info->dev : twl6040_core_dev,
	368	ARRAY_SIZE(info->supplies), info->supplies);
cc697d38 MLC	369	if (ret) {
	370	dev_err(info->dev, "couldn't get regulators %d\n", ret);
	371	goto err_regulator;
	372	}
	373
9ac7b1a3	374	if (vddvibl_uV) {
cc697d38	375	ret = regulator_set_voltage(info->supplies[0].consumer,
9ac7b1a3	376	vddvibl_uV, vddvibl_uV);
cc697d38 MLC	377	if (ret) {
	378	dev_err(info->dev, "failed to set VDDVIBL volt %d\n",
	379	ret);
	380	goto err_voltage;
	381	}
	382	}
	383
9ac7b1a3	384	if (vddvibr_uV) {
cc697d38	385	ret = regulator_set_voltage(info->supplies[1].consumer,
9ac7b1a3	386	vddvibr_uV, vddvibr_uV);
cc697d38 MLC	387	if (ret) {
	388	dev_err(info->dev, "failed to set VDDVIBR volt %d\n",
	389	ret);
	390	goto err_voltage;
	391	}
	392	}
	393
	394	info->workqueue = alloc_workqueue("twl6040-vibra", 0, 0);
	395	if (info->workqueue == NULL) {
	396	dev_err(info->dev, "couldn't create workqueue\n");
	397	ret = -ENOMEM;
	398	goto err_voltage;
	399	}
	400	INIT_WORK(&info->play_work, vibra_play_work);
	401
	402	return 0;
	403
	404	err_voltage:
	405	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
	406	err_regulator:
625cbe46	407	free_irq(info->irq, info);
cc697d38 MLC	408	err_irq:
	409	input_unregister_device(info->input_dev);
	410	info->input_dev = NULL;
	411	err_iff:
	412	if (info->input_dev)
	413	input_ff_destroy(info->input_dev);
	414	err_ialloc:
	415	input_free_device(info->input_dev);
	416	err_kzalloc:
	417	kfree(info);
	418	return ret;
	419	}
	420
	421	static int __devexit twl6040_vibra_remove(struct platform_device *pdev)
	422	{
	423	struct vibra_info *info = platform_get_drvdata(pdev);
	424
	425	input_unregister_device(info->input_dev);
625cbe46	426	free_irq(info->irq, info);
cc697d38 MLC	427	regulator_bulk_free(ARRAY_SIZE(info->supplies), info->supplies);
	428	destroy_workqueue(info->workqueue);
	429	kfree(info);
	430
	431	return 0;
	432	}
	433
	434	static struct platform_driver twl6040_vibra_driver = {
	435	.probe = twl6040_vibra_probe,
1cb0aa88	436	.remove = twl6040_vibra_remove,
cc697d38 MLC	437	.driver = {
	438	.name = "twl6040-vibra",
	439	.owner = THIS_MODULE,
	440	.pm = &twl6040_vibra_pm_ops,
	441	},
	442	};
840a746b	443	module_platform_driver(twl6040_vibra_driver);
cc697d38 MLC	444
	445	MODULE_ALIAS("platform:twl6040-vibra");
	446	MODULE_DESCRIPTION("TWL6040 Vibra driver");
	447	MODULE_LICENSE("GPL");
	448	MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
	449	MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");