[deliverable/linux.git] / drivers / input / mouse / synaptics_i2c.c

/*
 * Synaptics touchpad with I2C interface
 *
 * Copyright (C) 2009 Compulab, Ltd.
 * Mike Rapoport <mike@compulab.co.il>
 * Igor Grinberg <grinberg@compulab.co.il>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive for
 * more details.
 */

#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/slab.h>
#include <linux/pm.h>

#define DRIVER_NAME		"synaptics_i2c"
/* maximum product id is 15 characters */
#define PRODUCT_ID_LENGTH	15
#define REGISTER_LENGTH		8

/*
 * after soft reset, we should wait for 1 ms
 * before the device becomes operational
 */
#define SOFT_RESET_DELAY_MS	3
/* and after hard reset, we should wait for max 500ms */
#define HARD_RESET_DELAY_MS	500

/* Registers by SMBus address */
#define PAGE_SEL_REG		0xff
#define DEVICE_STATUS_REG	0x09

/* Registers by RMI address */
#define DEV_CONTROL_REG		0x0000
#define INTERRUPT_EN_REG	0x0001
#define ERR_STAT_REG		0x0002
#define INT_REQ_STAT_REG	0x0003
#define DEV_COMMAND_REG		0x0004

#define RMI_PROT_VER_REG	0x0200
#define MANUFACT_ID_REG		0x0201
#define PHYS_INT_VER_REG	0x0202
#define PROD_PROPERTY_REG	0x0203
#define INFO_QUERY_REG0		0x0204
#define INFO_QUERY_REG1		(INFO_QUERY_REG0 + 1)
#define INFO_QUERY_REG2		(INFO_QUERY_REG0 + 2)
#define INFO_QUERY_REG3		(INFO_QUERY_REG0 + 3)

#define PRODUCT_ID_REG0		0x0210
#define PRODUCT_ID_REG1		(PRODUCT_ID_REG0 + 1)
#define PRODUCT_ID_REG2		(PRODUCT_ID_REG0 + 2)
#define PRODUCT_ID_REG3		(PRODUCT_ID_REG0 + 3)
#define PRODUCT_ID_REG4		(PRODUCT_ID_REG0 + 4)
#define PRODUCT_ID_REG5		(PRODUCT_ID_REG0 + 5)
#define PRODUCT_ID_REG6		(PRODUCT_ID_REG0 + 6)
#define PRODUCT_ID_REG7		(PRODUCT_ID_REG0 + 7)
#define PRODUCT_ID_REG8		(PRODUCT_ID_REG0 + 8)
#define PRODUCT_ID_REG9		(PRODUCT_ID_REG0 + 9)
#define PRODUCT_ID_REG10	(PRODUCT_ID_REG0 + 10)
#define PRODUCT_ID_REG11	(PRODUCT_ID_REG0 + 11)
#define PRODUCT_ID_REG12	(PRODUCT_ID_REG0 + 12)
#define PRODUCT_ID_REG13	(PRODUCT_ID_REG0 + 13)
#define PRODUCT_ID_REG14	(PRODUCT_ID_REG0 + 14)
#define PRODUCT_ID_REG15	(PRODUCT_ID_REG0 + 15)

#define DATA_REG0		0x0400
#define ABS_PRESSURE_REG	0x0401
#define ABS_MSB_X_REG		0x0402
#define ABS_LSB_X_REG		(ABS_MSB_X_REG + 1)
#define ABS_MSB_Y_REG		0x0404
#define ABS_LSB_Y_REG		(ABS_MSB_Y_REG + 1)
#define REL_X_REG		0x0406
#define REL_Y_REG		0x0407

#define DEV_QUERY_REG0		0x1000
#define DEV_QUERY_REG1		(DEV_QUERY_REG0 + 1)
#define DEV_QUERY_REG2		(DEV_QUERY_REG0 + 2)
#define DEV_QUERY_REG3		(DEV_QUERY_REG0 + 3)
#define DEV_QUERY_REG4		(DEV_QUERY_REG0 + 4)
#define DEV_QUERY_REG5		(DEV_QUERY_REG0 + 5)
#define DEV_QUERY_REG6		(DEV_QUERY_REG0 + 6)
#define DEV_QUERY_REG7		(DEV_QUERY_REG0 + 7)
#define DEV_QUERY_REG8		(DEV_QUERY_REG0 + 8)

#define GENERAL_2D_CONTROL_REG	0x1041
#define SENSOR_SENSITIVITY_REG	0x1044
#define SENS_MAX_POS_MSB_REG	0x1046
#define SENS_MAX_POS_LSB_REG	(SENS_MAX_POS_UPPER_REG + 1)

/* Register bits */
/* Device Control Register Bits */
#define REPORT_RATE_1ST_BIT	6

/* Interrupt Enable Register Bits (INTERRUPT_EN_REG) */
#define F10_ABS_INT_ENA		0
#define F10_REL_INT_ENA		1
#define F20_INT_ENA		2

/* Interrupt Request Register Bits (INT_REQ_STAT_REG | DEVICE_STATUS_REG) */
#define F10_ABS_INT_REQ		0
#define F10_REL_INT_REQ		1
#define F20_INT_REQ		2
/* Device Status Register Bits (DEVICE_STATUS_REG) */
#define STAT_CONFIGURED		6
#define STAT_ERROR		7

/* Device Command Register Bits (DEV_COMMAND_REG) */
#define RESET_COMMAND		0x01
#define REZERO_COMMAND		0x02

/* Data Register 0 Bits (DATA_REG0) */
#define GESTURE			3

/* Device Query Registers Bits */
/* DEV_QUERY_REG3 */
#define HAS_PALM_DETECT		1
#define HAS_MULTI_FING		2
#define HAS_SCROLLER		4
#define HAS_2D_SCROLL		5

/* General 2D Control Register Bits (GENERAL_2D_CONTROL_REG) */
#define NO_DECELERATION		1
#define REDUCE_REPORTING	3
#define NO_FILTER		5

/* Function Masks */
/* Device Control Register Masks (DEV_CONTROL_REG) */
#define REPORT_RATE_MSK		0xc0
#define SLEEP_MODE_MSK		0x07

/* Device Sleep Modes */
#define FULL_AWAKE		0x0
#define NORMAL_OP		0x1
#define LOW_PWR_OP		0x2
#define VERY_LOW_PWR_OP		0x3
#define SENS_SLEEP		0x4
#define SLEEP_MOD		0x5
#define DEEP_SLEEP		0x6
#define HIBERNATE		0x7

/* Interrupt Register Mask */
/* (INT_REQ_STAT_REG | DEVICE_STATUS_REG | INTERRUPT_EN_REG) */
#define INT_ENA_REQ_MSK		0x07
#define INT_ENA_ABS_MSK		0x01
#define INT_ENA_REL_MSK		0x02
#define INT_ENA_F20_MSK		0x04

/* Device Status Register Masks (DEVICE_STATUS_REG) */
#define CONFIGURED_MSK		0x40
#define ERROR_MSK		0x80

/* Data Register 0 Masks */
#define FINGER_WIDTH_MSK	0xf0
#define GESTURE_MSK		0x08
#define SENSOR_STATUS_MSK	0x07

/*
 * MSB Position Register Masks
 * ABS_MSB_X_REG | ABS_MSB_Y_REG | SENS_MAX_POS_MSB_REG |
 * DEV_QUERY_REG3 | DEV_QUERY_REG5
 */
#define MSB_POSITION_MSK	0x1f

/* Device Query Registers Masks */

/* DEV_QUERY_REG2 */
#define NUM_EXTRA_POS_MSK	0x07

/* When in IRQ mode read the device every THREAD_IRQ_SLEEP_SECS */
#define THREAD_IRQ_SLEEP_SECS	2
#define THREAD_IRQ_SLEEP_MSECS	(THREAD_IRQ_SLEEP_SECS * MSEC_PER_SEC)

/*
 * When in Polling mode and no data received for NO_DATA_THRES msecs
 * reduce the polling rate to NO_DATA_SLEEP_MSECS
 */
#define NO_DATA_THRES		(MSEC_PER_SEC)
#define NO_DATA_SLEEP_MSECS	(MSEC_PER_SEC / 4)

/* Control touchpad's No Deceleration option */
static bool no_decel = true;
module_param(no_decel, bool, 0644);
MODULE_PARM_DESC(no_decel, "No Deceleration. Default = 1 (on)");

/* Control touchpad's Reduced Reporting option */
static bool reduce_report;
module_param(reduce_report, bool, 0644);
MODULE_PARM_DESC(reduce_report, "Reduced Reporting. Default = 0 (off)");

/* Control touchpad's No Filter option */
static bool no_filter;
module_param(no_filter, bool, 0644);
MODULE_PARM_DESC(no_filter, "No Filter. Default = 0 (off)");

/*
 * touchpad Attention line is Active Low and Open Drain,
 * therefore should be connected to pulled up line
 * and the irq configuration should be set to Falling Edge Trigger
 */
/* Control IRQ / Polling option */
static bool polling_req;
module_param(polling_req, bool, 0444);
MODULE_PARM_DESC(polling_req, "Request Polling. Default = 0 (use irq)");

/* Control Polling Rate */
static int scan_rate = 80;
module_param(scan_rate, int, 0644);
MODULE_PARM_DESC(scan_rate, "Polling rate in times/sec. Default = 80");

/* The main device structure */
struct synaptics_i2c {
	struct i2c_client	*client;
	struct input_dev	*input;
	struct delayed_work	dwork;
	spinlock_t		lock;
	int			no_data_count;
	int			no_decel_param;
	int			reduce_report_param;
	int			no_filter_param;
	int			scan_rate_param;
	int			scan_ms;
};

static inline void set_scan_rate(struct synaptics_i2c *touch, int scan_rate)
{
	touch->scan_ms = MSEC_PER_SEC / scan_rate;
	touch->scan_rate_param = scan_rate;
}

/*
 * Driver's initial design makes no race condition possible on i2c bus,
 * so there is no need in any locking.
 * Keep it in mind, while playing with the code.
 */
static s32 synaptics_i2c_reg_get(struct i2c_client *client, u16 reg)
{
	int ret;

	ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
	if (ret == 0)
		ret = i2c_smbus_read_byte_data(client, reg & 0xff);

	return ret;
}

static s32 synaptics_i2c_reg_set(struct i2c_client *client, u16 reg, u8 val)
{
	int ret;

	ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
	if (ret == 0)
		ret = i2c_smbus_write_byte_data(client, reg & 0xff, val);

	return ret;
}

static s32 synaptics_i2c_word_get(struct i2c_client *client, u16 reg)
{
	int ret;

	ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
	if (ret == 0)
		ret = i2c_smbus_read_word_data(client, reg & 0xff);

	return ret;
}

static int synaptics_i2c_config(struct i2c_client *client)
{
	int ret, control;
	u8 int_en;

	/* set Report Rate to Device Highest (>=80) and Sleep to normal */
	ret = synaptics_i2c_reg_set(client, DEV_CONTROL_REG, 0xc1);
	if (ret)
		return ret;

	/* set Interrupt Disable to Func20 / Enable to Func10) */
	int_en = (polling_req) ? 0 : INT_ENA_ABS_MSK | INT_ENA_REL_MSK;
	ret = synaptics_i2c_reg_set(client, INTERRUPT_EN_REG, int_en);
	if (ret)
		return ret;

	control = synaptics_i2c_reg_get(client, GENERAL_2D_CONTROL_REG);
	/* No Deceleration */
	control |= no_decel ? 1 << NO_DECELERATION : 0;
	/* Reduced Reporting */
	control |= reduce_report ? 1 << REDUCE_REPORTING : 0;
	/* No Filter */
	control |= no_filter ? 1 << NO_FILTER : 0;
	ret = synaptics_i2c_reg_set(client, GENERAL_2D_CONTROL_REG, control);
	if (ret)
		return ret;

	return 0;
}

static int synaptics_i2c_reset_config(struct i2c_client *client)
{
	int ret;

	/* Reset the Touchpad */
	ret = synaptics_i2c_reg_set(client, DEV_COMMAND_REG, RESET_COMMAND);
	if (ret) {
		dev_err(&client->dev, "Unable to reset device\n");
	} else {
		msleep(SOFT_RESET_DELAY_MS);
		ret = synaptics_i2c_config(client);
		if (ret)
			dev_err(&client->dev, "Unable to config device\n");
	}

	return ret;
}

static int synaptics_i2c_check_error(struct i2c_client *client)
{
	int status, ret = 0;

	status = i2c_smbus_read_byte_data(client, DEVICE_STATUS_REG) &
		(CONFIGURED_MSK | ERROR_MSK);

	if (status != CONFIGURED_MSK)
		ret = synaptics_i2c_reset_config(client);

	return ret;
}

static bool synaptics_i2c_get_input(struct synaptics_i2c *touch)
{
	struct input_dev *input = touch->input;
	int xy_delta, gesture;
	s32 data;
	s8 x_delta, y_delta;

	/* Deal with spontaneous resets and errors */
	if (synaptics_i2c_check_error(touch->client))
		return false;

	/* Get Gesture Bit */
	data = synaptics_i2c_reg_get(touch->client, DATA_REG0);
	gesture = (data >> GESTURE) & 0x1;

	/*
	 * Get Relative axes. we have to get them in one shot,
	 * so we get 2 bytes starting from REL_X_REG.
	 */
	xy_delta = synaptics_i2c_word_get(touch->client, REL_X_REG) & 0xffff;

	/* Separate X from Y */
	x_delta = xy_delta & 0xff;
	y_delta = (xy_delta >> REGISTER_LENGTH) & 0xff;

	/* Report the button event */
	input_report_key(input, BTN_LEFT, gesture);

	/* Report the deltas */
	input_report_rel(input, REL_X, x_delta);
	input_report_rel(input, REL_Y, -y_delta);
	input_sync(input);

	return xy_delta || gesture;
}

static void synaptics_i2c_reschedule_work(struct synaptics_i2c *touch,
					  unsigned long delay)
{
	unsigned long flags;

	spin_lock_irqsave(&touch->lock, flags);

	mod_delayed_work(system_wq, &touch->dwork, delay);

	spin_unlock_irqrestore(&touch->lock, flags);
}

static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id)
{
	struct synaptics_i2c *touch = dev_id;

	synaptics_i2c_reschedule_work(touch, 0);

	return IRQ_HANDLED;
}

static void synaptics_i2c_check_params(struct synaptics_i2c *touch)
{
	bool reset = false;

	if (scan_rate != touch->scan_rate_param)
		set_scan_rate(touch, scan_rate);

	if (no_decel != touch->no_decel_param) {
		touch->no_decel_param = no_decel;
		reset = true;
	}

	if (no_filter != touch->no_filter_param) {
		touch->no_filter_param = no_filter;
		reset = true;
	}

	if (reduce_report != touch->reduce_report_param) {
		touch->reduce_report_param = reduce_report;
		reset = true;
	}

	if (reset)
		synaptics_i2c_reset_config(touch->client);
}

/* Control the Device polling rate / Work Handler sleep time */
static unsigned long synaptics_i2c_adjust_delay(struct synaptics_i2c *touch,
						bool have_data)
{
	unsigned long delay, nodata_count_thres;

	if (polling_req) {
		delay = touch->scan_ms;
		if (have_data) {
			touch->no_data_count = 0;
		} else {
			nodata_count_thres = NO_DATA_THRES / touch->scan_ms;
			if (touch->no_data_count < nodata_count_thres)
				touch->no_data_count++;
			else
				delay = NO_DATA_SLEEP_MSECS;
		}
		return msecs_to_jiffies(delay);
	} else {
		delay = msecs_to_jiffies(THREAD_IRQ_SLEEP_MSECS);
		return round_jiffies_relative(delay);
	}
}

/* Work Handler */
static void synaptics_i2c_work_handler(struct work_struct *work)
{
	bool have_data;
	struct synaptics_i2c *touch =
			container_of(work, struct synaptics_i2c, dwork.work);
	unsigned long delay;

	synaptics_i2c_check_params(touch);

	have_data = synaptics_i2c_get_input(touch);
	delay = synaptics_i2c_adjust_delay(touch, have_data);

	/*
	 * While interrupt driven, there is no real need to poll the device.
	 * But touchpads are very sensitive, so there could be errors
	 * related to physical environment and the attention line isn't
	 * necessarily asserted. In such case we can lose the touchpad.
	 * We poll the device once in THREAD_IRQ_SLEEP_SECS and
	 * if error is detected, we try to reset and reconfigure the touchpad.
	 */
	synaptics_i2c_reschedule_work(touch, delay);
}

static int synaptics_i2c_open(struct input_dev *input)
{
	struct synaptics_i2c *touch = input_get_drvdata(input);
	int ret;

	ret = synaptics_i2c_reset_config(touch->client);
	if (ret)
		return ret;

	if (polling_req)
		synaptics_i2c_reschedule_work(touch,
				msecs_to_jiffies(NO_DATA_SLEEP_MSECS));

	return 0;
}

static void synaptics_i2c_close(struct input_dev *input)
{
	struct synaptics_i2c *touch = input_get_drvdata(input);

	if (!polling_req)
		synaptics_i2c_reg_set(touch->client, INTERRUPT_EN_REG, 0);

	cancel_delayed_work_sync(&touch->dwork);

	/* Save some power */
	synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
}

static void synaptics_i2c_set_input_params(struct synaptics_i2c *touch)
{
	struct input_dev *input = touch->input;

	input->name = touch->client->name;
	input->phys = touch->client->adapter->name;
	input->id.bustype = BUS_I2C;
	input->id.version = synaptics_i2c_word_get(touch->client,
						   INFO_QUERY_REG0);
	input->dev.parent = &touch->client->dev;
	input->open = synaptics_i2c_open;
	input->close = synaptics_i2c_close;
	input_set_drvdata(input, touch);

	/* Register the device as mouse */
	__set_bit(EV_REL, input->evbit);
	__set_bit(REL_X, input->relbit);
	__set_bit(REL_Y, input->relbit);

	/* Register device's buttons and keys */
	__set_bit(EV_KEY, input->evbit);
	__set_bit(BTN_LEFT, input->keybit);
}

static struct synaptics_i2c *synaptics_i2c_touch_create(struct i2c_client *client)
{
	struct synaptics_i2c *touch;

	touch = kzalloc(sizeof(struct synaptics_i2c), GFP_KERNEL);
	if (!touch)
		return NULL;

	touch->client = client;
	touch->no_decel_param = no_decel;
	touch->scan_rate_param = scan_rate;
	set_scan_rate(touch, scan_rate);
	INIT_DELAYED_WORK(&touch->dwork, synaptics_i2c_work_handler);
	spin_lock_init(&touch->lock);

	return touch;
}

static int synaptics_i2c_probe(struct i2c_client *client,
			       const struct i2c_device_id *dev_id)
{
	int ret;
	struct synaptics_i2c *touch;

	touch = synaptics_i2c_touch_create(client);
	if (!touch)
		return -ENOMEM;

	ret = synaptics_i2c_reset_config(client);
	if (ret)
		goto err_mem_free;

	if (client->irq < 1)
		polling_req = true;

	touch->input = input_allocate_device();
	if (!touch->input) {
		ret = -ENOMEM;
		goto err_mem_free;
	}

	synaptics_i2c_set_input_params(touch);

	if (!polling_req) {
		dev_dbg(&touch->client->dev,
			 "Requesting IRQ: %d\n", touch->client->irq);

		ret = request_irq(touch->client->irq, synaptics_i2c_irq,
				  IRQ_TYPE_EDGE_FALLING,
				  DRIVER_NAME, touch);
		if (ret) {
			dev_warn(&touch->client->dev,
				  "IRQ request failed: %d, "
				  "falling back to polling\n", ret);
			polling_req = true;
			synaptics_i2c_reg_set(touch->client,
					      INTERRUPT_EN_REG, 0);
		}
	}

	if (polling_req)
		dev_dbg(&touch->client->dev,
			 "Using polling at rate: %d times/sec\n", scan_rate);

	/* Register the device in input subsystem */
	ret = input_register_device(touch->input);
	if (ret) {
		dev_err(&client->dev,
			 "Input device register failed: %d\n", ret);
		goto err_input_free;
	}

	i2c_set_clientdata(client, touch);

	return 0;

err_input_free:
	input_free_device(touch->input);
err_mem_free:
	kfree(touch);

	return ret;
}

static int synaptics_i2c_remove(struct i2c_client *client)
{
	struct synaptics_i2c *touch = i2c_get_clientdata(client);

	if (!polling_req)
		free_irq(client->irq, touch);

	input_unregister_device(touch->input);
	kfree(touch);

	return 0;
}

static int __maybe_unused synaptics_i2c_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct synaptics_i2c *touch = i2c_get_clientdata(client);

	cancel_delayed_work_sync(&touch->dwork);

	/* Save some power */
	synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);

	return 0;
}

static int __maybe_unused synaptics_i2c_resume(struct device *dev)
{
	int ret;
	struct i2c_client *client = to_i2c_client(dev);
	struct synaptics_i2c *touch = i2c_get_clientdata(client);

	ret = synaptics_i2c_reset_config(client);
	if (ret)
		return ret;

	synaptics_i2c_reschedule_work(touch,
				msecs_to_jiffies(NO_DATA_SLEEP_MSECS));

	return 0;
}

static SIMPLE_DEV_PM_OPS(synaptics_i2c_pm, synaptics_i2c_suspend,
			 synaptics_i2c_resume);

static const struct i2c_device_id synaptics_i2c_id_table[] = {
	{ "synaptics_i2c", 0 },
	{ },
};
MODULE_DEVICE_TABLE(i2c, synaptics_i2c_id_table);

static struct i2c_driver synaptics_i2c_driver = {
	.driver = {
		.name	= DRIVER_NAME,
		.pm	= &synaptics_i2c_pm,
	},

	.probe		= synaptics_i2c_probe,
	.remove		= synaptics_i2c_remove,

	.id_table	= synaptics_i2c_id_table,
};

module_i2c_driver(synaptics_i2c_driver);

MODULE_DESCRIPTION("Synaptics I2C touchpad driver");
MODULE_AUTHOR("Mike Rapoport, Igor Grinberg, Compulab");
MODULE_LICENSE("GPL");
Commit	Line	Data
eef3e4ca MR	1	/*
	2	* Synaptics touchpad with I2C interface
	3	*
	4	* Copyright (C) 2009 Compulab, Ltd.
	5	* Mike Rapoport <mike@compulab.co.il>
	6	* Igor Grinberg <grinberg@compulab.co.il>
	7	*
	8	* This file is subject to the terms and conditions of the GNU General Public
	9	* License. See the file COPYING in the main directory of this archive for
	10	* more details.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/i2c.h>
	15	#include <linux/irq.h>
	16	#include <linux/interrupt.h>
	17	#include <linux/input.h>
	18	#include <linux/delay.h>
	19	#include <linux/workqueue.h>
5a0e3ad6	20	#include <linux/slab.h>
87b2c7df	21	#include <linux/pm.h>
eef3e4ca MR	22
	23	#define DRIVER_NAME "synaptics_i2c"
	24	/* maximum product id is 15 characters */
	25	#define PRODUCT_ID_LENGTH 15
	26	#define REGISTER_LENGTH 8
	27
	28	/*
	29	* after soft reset, we should wait for 1 ms
	30	* before the device becomes operational
	31	*/
	32	#define SOFT_RESET_DELAY_MS 3
	33	/* and after hard reset, we should wait for max 500ms */
	34	#define HARD_RESET_DELAY_MS 500
	35
	36	/* Registers by SMBus address */
	37	#define PAGE_SEL_REG 0xff
	38	#define DEVICE_STATUS_REG 0x09
	39
	40	/* Registers by RMI address */
	41	#define DEV_CONTROL_REG 0x0000
	42	#define INTERRUPT_EN_REG 0x0001
	43	#define ERR_STAT_REG 0x0002
	44	#define INT_REQ_STAT_REG 0x0003
	45	#define DEV_COMMAND_REG 0x0004
	46
	47	#define RMI_PROT_VER_REG 0x0200
	48	#define MANUFACT_ID_REG 0x0201
	49	#define PHYS_INT_VER_REG 0x0202
	50	#define PROD_PROPERTY_REG 0x0203
	51	#define INFO_QUERY_REG0 0x0204
	52	#define INFO_QUERY_REG1 (INFO_QUERY_REG0 + 1)
	53	#define INFO_QUERY_REG2 (INFO_QUERY_REG0 + 2)
	54	#define INFO_QUERY_REG3 (INFO_QUERY_REG0 + 3)
	55
	56	#define PRODUCT_ID_REG0 0x0210
	57	#define PRODUCT_ID_REG1 (PRODUCT_ID_REG0 + 1)
	58	#define PRODUCT_ID_REG2 (PRODUCT_ID_REG0 + 2)
	59	#define PRODUCT_ID_REG3 (PRODUCT_ID_REG0 + 3)
	60	#define PRODUCT_ID_REG4 (PRODUCT_ID_REG0 + 4)
	61	#define PRODUCT_ID_REG5 (PRODUCT_ID_REG0 + 5)
	62	#define PRODUCT_ID_REG6 (PRODUCT_ID_REG0 + 6)
	63	#define PRODUCT_ID_REG7 (PRODUCT_ID_REG0 + 7)
	64	#define PRODUCT_ID_REG8 (PRODUCT_ID_REG0 + 8)
	65	#define PRODUCT_ID_REG9 (PRODUCT_ID_REG0 + 9)
	66	#define PRODUCT_ID_REG10 (PRODUCT_ID_REG0 + 10)
	67	#define PRODUCT_ID_REG11 (PRODUCT_ID_REG0 + 11)
	68	#define PRODUCT_ID_REG12 (PRODUCT_ID_REG0 + 12)
	69	#define PRODUCT_ID_REG13 (PRODUCT_ID_REG0 + 13)
	70	#define PRODUCT_ID_REG14 (PRODUCT_ID_REG0 + 14)
	71	#define PRODUCT_ID_REG15 (PRODUCT_ID_REG0 + 15)
	72
	73	#define DATA_REG0 0x0400
	74	#define ABS_PRESSURE_REG 0x0401
	75	#define ABS_MSB_X_REG 0x0402
	76	#define ABS_LSB_X_REG (ABS_MSB_X_REG + 1)
	77	#define ABS_MSB_Y_REG 0x0404
	78	#define ABS_LSB_Y_REG (ABS_MSB_Y_REG + 1)
	79	#define REL_X_REG 0x0406
	80	#define REL_Y_REG 0x0407
	81
	82	#define DEV_QUERY_REG0 0x1000
	83	#define DEV_QUERY_REG1 (DEV_QUERY_REG0 + 1)
	84	#define DEV_QUERY_REG2 (DEV_QUERY_REG0 + 2)
	85	#define DEV_QUERY_REG3 (DEV_QUERY_REG0 + 3)
86	#define DEV_QUERY_REG4 (DEV_QUERY_REG0 + 4)
87	#define DEV_QUERY_REG5 (DEV_QUERY_REG0 + 5)
88	#define DEV_QUERY_REG6 (DEV_QUERY_REG0 + 6)
89	#define DEV_QUERY_REG7 (DEV_QUERY_REG0 + 7)
90	#define DEV_QUERY_REG8 (DEV_QUERY_REG0 + 8)
91
92	#define GENERAL_2D_CONTROL_REG 0x1041
93	#define SENSOR_SENSITIVITY_REG 0x1044
94	#define SENS_MAX_POS_MSB_REG 0x1046
95	#define SENS_MAX_POS_LSB_REG (SENS_MAX_POS_UPPER_REG + 1)
96
97	/* Register bits */
98	/* Device Control Register Bits */
99	#define REPORT_RATE_1ST_BIT 6
100
101	/* Interrupt Enable Register Bits (INTERRUPT_EN_REG) */
102	#define F10_ABS_INT_ENA 0
103	#define F10_REL_INT_ENA 1
104	#define F20_INT_ENA 2
105
106	/* Interrupt Request Register Bits (INT_REQ_STAT_REG \| DEVICE_STATUS_REG) */
107	#define F10_ABS_INT_REQ 0
108	#define F10_REL_INT_REQ 1
109	#define F20_INT_REQ 2
110	/* Device Status Register Bits (DEVICE_STATUS_REG) */
111	#define STAT_CONFIGURED 6
112	#define STAT_ERROR 7
113
114	/* Device Command Register Bits (DEV_COMMAND_REG) */
115	#define RESET_COMMAND 0x01
116	#define REZERO_COMMAND 0x02
117
118	/* Data Register 0 Bits (DATA_REG0) */
119	#define GESTURE 3
120
121	/* Device Query Registers Bits */
122	/* DEV_QUERY_REG3 */
123	#define HAS_PALM_DETECT 1
124	#define HAS_MULTI_FING 2
125	#define HAS_SCROLLER 4
126	#define HAS_2D_SCROLL 5
127
128	/* General 2D Control Register Bits (GENERAL_2D_CONTROL_REG) */
129	#define NO_DECELERATION 1
130	#define REDUCE_REPORTING 3
131	#define NO_FILTER 5
132
133	/* Function Masks */
134	/* Device Control Register Masks (DEV_CONTROL_REG) */
135	#define REPORT_RATE_MSK 0xc0
136	#define SLEEP_MODE_MSK 0x07
137
138	/* Device Sleep Modes */
139	#define FULL_AWAKE 0x0
140	#define NORMAL_OP 0x1
141	#define LOW_PWR_OP 0x2
142	#define VERY_LOW_PWR_OP 0x3
143	#define SENS_SLEEP 0x4
144	#define SLEEP_MOD 0x5
145	#define DEEP_SLEEP 0x6
146	#define HIBERNATE 0x7
147
148	/* Interrupt Register Mask */
149	/* (INT_REQ_STAT_REG \| DEVICE_STATUS_REG \| INTERRUPT_EN_REG) */
150	#define INT_ENA_REQ_MSK 0x07
151	#define INT_ENA_ABS_MSK 0x01
152	#define INT_ENA_REL_MSK 0x02
153	#define INT_ENA_F20_MSK 0x04
154
155	/* Device Status Register Masks (DEVICE_STATUS_REG) */
156	#define CONFIGURED_MSK 0x40
157	#define ERROR_MSK 0x80
158
159	/* Data Register 0 Masks */
160	#define FINGER_WIDTH_MSK 0xf0
161	#define GESTURE_MSK 0x08
162	#define SENSOR_STATUS_MSK 0x07
163
164	/*
165	* MSB Position Register Masks
166	* ABS_MSB_X_REG \| ABS_MSB_Y_REG \| SENS_MAX_POS_MSB_REG \|
167	* DEV_QUERY_REG3 \| DEV_QUERY_REG5
168	*/
169	#define MSB_POSITION_MSK 0x1f
170
171	/* Device Query Registers Masks */
172
173	/* DEV_QUERY_REG2 */
174	#define NUM_EXTRA_POS_MSK 0x07
175
176	/* When in IRQ mode read the device every THREAD_IRQ_SLEEP_SECS */
177	#define THREAD_IRQ_SLEEP_SECS 2
178	#define THREAD_IRQ_SLEEP_MSECS (THREAD_IRQ_SLEEP_SECS * MSEC_PER_SEC)
179
180	/*
181	* When in Polling mode and no data received for NO_DATA_THRES msecs
182	* reduce the polling rate to NO_DATA_SLEEP_MSECS
183	*/
184	#define NO_DATA_THRES (MSEC_PER_SEC)
185	#define NO_DATA_SLEEP_MSECS (MSEC_PER_SEC / 4)
186
187	/* Control touchpad's No Deceleration option */
e002273b	188	static bool no_decel = true;
eef3e4ca MR	189	module_param(no_decel, bool, 0644);
	190	MODULE_PARM_DESC(no_decel, "No Deceleration. Default = 1 (on)");
	191
	192	/* Control touchpad's Reduced Reporting option */
90ab5ee9	193	static bool reduce_report;
eef3e4ca MR	194	module_param(reduce_report, bool, 0644);
	195	MODULE_PARM_DESC(reduce_report, "Reduced Reporting. Default = 0 (off)");
	196
	197	/* Control touchpad's No Filter option */
90ab5ee9	198	static bool no_filter;
eef3e4ca MR	199	module_param(no_filter, bool, 0644);
	200	MODULE_PARM_DESC(no_filter, "No Filter. Default = 0 (off)");
	201
	202	/*
	203	* touchpad Attention line is Active Low and Open Drain,
	204	* therefore should be connected to pulled up line
	205	* and the irq configuration should be set to Falling Edge Trigger
	206	*/
	207	/* Control IRQ / Polling option */
30b37131	208	static bool polling_req;
eef3e4ca MR	209	module_param(polling_req, bool, 0444);
	210	MODULE_PARM_DESC(polling_req, "Request Polling. Default = 0 (use irq)");
	211
	212	/* Control Polling Rate */
	213	static int scan_rate = 80;
	214	module_param(scan_rate, int, 0644);
	215	MODULE_PARM_DESC(scan_rate, "Polling rate in times/sec. Default = 80");
	216
	217	/* The main device structure */
	218	struct synaptics_i2c {
	219	struct i2c_client *client;
	220	struct input_dev *input;
	221	struct delayed_work dwork;
30b37131	222	spinlock_t lock;
eef3e4ca MR	223	int no_data_count;
	224	int no_decel_param;
	225	int reduce_report_param;
	226	int no_filter_param;
	227	int scan_rate_param;
	228	int scan_ms;
	229	};
	230
	231	static inline void set_scan_rate(struct synaptics_i2c *touch, int scan_rate)
	232	{
	233	touch->scan_ms = MSEC_PER_SEC / scan_rate;
	234	touch->scan_rate_param = scan_rate;
	235	}
	236
	237	/*
	238	* Driver's initial design makes no race condition possible on i2c bus,
	239	* so there is no need in any locking.
	240	* Keep it in mind, while playing with the code.
	241	*/
	242	static s32 synaptics_i2c_reg_get(struct i2c_client *client, u16 reg)
	243	{
	244	int ret;
	245
	246	ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
	247	if (ret == 0)
	248	ret = i2c_smbus_read_byte_data(client, reg & 0xff);
	249
	250	return ret;
	251	}
	252
	253	static s32 synaptics_i2c_reg_set(struct i2c_client *client, u16 reg, u8 val)
	254	{
	255	int ret;
	256
	257	ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
	258	if (ret == 0)
	259	ret = i2c_smbus_write_byte_data(client, reg & 0xff, val);
	260
	261	return ret;
	262	}
	263
	264	static s32 synaptics_i2c_word_get(struct i2c_client *client, u16 reg)
	265	{
	266	int ret;
	267
	268	ret = i2c_smbus_write_byte_data(client, PAGE_SEL_REG, reg >> 8);
	269	if (ret == 0)
	270	ret = i2c_smbus_read_word_data(client, reg & 0xff);
	271
	272	return ret;
	273	}
	274
	275	static int synaptics_i2c_config(struct i2c_client *client)
	276	{
	277	int ret, control;
	278	u8 int_en;
	279
	280	/* set Report Rate to Device Highest (>=80) and Sleep to normal */
	281	ret = synaptics_i2c_reg_set(client, DEV_CONTROL_REG, 0xc1);
	282	if (ret)
	283	return ret;
	284
	285	/* set Interrupt Disable to Func20 / Enable to Func10) */
	286	int_en = (polling_req) ? 0 : INT_ENA_ABS_MSK \| INT_ENA_REL_MSK;
287	ret = synaptics_i2c_reg_set(client, INTERRUPT_EN_REG, int_en);
288	if (ret)
289	return ret;
290
291	control = synaptics_i2c_reg_get(client, GENERAL_2D_CONTROL_REG);
292	/* No Deceleration */
293	control \|= no_decel ? 1 << NO_DECELERATION : 0;
294	/* Reduced Reporting */
295	control \|= reduce_report ? 1 << REDUCE_REPORTING : 0;
296	/* No Filter */
297	control \|= no_filter ? 1 << NO_FILTER : 0;
298	ret = synaptics_i2c_reg_set(client, GENERAL_2D_CONTROL_REG, control);
299	if (ret)
300	return ret;
301
302	return 0;
303	}
304
305	static int synaptics_i2c_reset_config(struct i2c_client *client)
306	{
307	int ret;
308
309	/* Reset the Touchpad */
310	ret = synaptics_i2c_reg_set(client, DEV_COMMAND_REG, RESET_COMMAND);
311	if (ret) {
312	dev_err(&client->dev, "Unable to reset device\n");
313	} else {
314	msleep(SOFT_RESET_DELAY_MS);
315	ret = synaptics_i2c_config(client);
316	if (ret)
317	dev_err(&client->dev, "Unable to config device\n");
318	}
319
320	return ret;
321	}
322
323	static int synaptics_i2c_check_error(struct i2c_client *client)
324	{
325	int status, ret = 0;
326
327	status = i2c_smbus_read_byte_data(client, DEVICE_STATUS_REG) &
328	(CONFIGURED_MSK \| ERROR_MSK);
329
330	if (status != CONFIGURED_MSK)
331	ret = synaptics_i2c_reset_config(client);
332
333	return ret;
334	}
335
336	static bool synaptics_i2c_get_input(struct synaptics_i2c *touch)
337	{
338	struct input_dev *input = touch->input;
339	int xy_delta, gesture;
340	s32 data;
341	s8 x_delta, y_delta;
342
e002273b	343	/* Deal with spontaneous resets and errors */
eef3e4ca	344	if (synaptics_i2c_check_error(touch->client))
e002273b	345	return false;
eef3e4ca MR	346
	347	/* Get Gesture Bit */
	348	data = synaptics_i2c_reg_get(touch->client, DATA_REG0);
	349	gesture = (data >> GESTURE) & 0x1;
	350
	351	/*
	352	* Get Relative axes. we have to get them in one shot,
	353	* so we get 2 bytes starting from REL_X_REG.
	354	*/
	355	xy_delta = synaptics_i2c_word_get(touch->client, REL_X_REG) & 0xffff;
	356
	357	/* Separate X from Y */
	358	x_delta = xy_delta & 0xff;
	359	y_delta = (xy_delta >> REGISTER_LENGTH) & 0xff;
	360
	361	/* Report the button event */
	362	input_report_key(input, BTN_LEFT, gesture);
	363
	364	/* Report the deltas */
	365	input_report_rel(input, REL_X, x_delta);
	366	input_report_rel(input, REL_Y, -y_delta);
	367	input_sync(input);
	368
	369	return xy_delta \|\| gesture;
	370	}
	371
30b37131 DT	372	static void synaptics_i2c_reschedule_work(struct synaptics_i2c *touch,
30b37131 DT	373	unsigned long delay)
eef3e4ca	374	{
30b37131 DT	375	unsigned long flags;
	376
	377	spin_lock_irqsave(&touch->lock, flags);
eef3e4ca	378
e7c2f967	379	mod_delayed_work(system_wq, &touch->dwork, delay);
30b37131 DT	380
	381	spin_unlock_irqrestore(&touch->lock, flags);
	382	}
	383
	384	static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id)
	385	{
	386	struct synaptics_i2c *touch = dev_id;
	387
	388	synaptics_i2c_reschedule_work(touch, 0);
eef3e4ca MR	389
	390	return IRQ_HANDLED;
	391	}
	392
	393	static void synaptics_i2c_check_params(struct synaptics_i2c *touch)
	394	{
	395	bool reset = false;
	396
	397	if (scan_rate != touch->scan_rate_param)
	398	set_scan_rate(touch, scan_rate);
	399
	400	if (no_decel != touch->no_decel_param) {
	401	touch->no_decel_param = no_decel;
	402	reset = true;
	403	}
	404
	405	if (no_filter != touch->no_filter_param) {
	406	touch->no_filter_param = no_filter;
	407	reset = true;
	408	}
	409
	410	if (reduce_report != touch->reduce_report_param) {
	411	touch->reduce_report_param = reduce_report;
	412	reset = true;
	413	}
	414
	415	if (reset)
	416	synaptics_i2c_reset_config(touch->client);
	417	}
	418
	419	/* Control the Device polling rate / Work Handler sleep time */
f5ba3502 DT	420	static unsigned long synaptics_i2c_adjust_delay(struct synaptics_i2c *touch,
f5ba3502 DT	421	bool have_data)
eef3e4ca MR	422	{
	423	unsigned long delay, nodata_count_thres;
	424
	425	if (polling_req) {
	426	delay = touch->scan_ms;
	427	if (have_data) {
	428	touch->no_data_count = 0;
	429	} else {
	430	nodata_count_thres = NO_DATA_THRES / touch->scan_ms;
	431	if (touch->no_data_count < nodata_count_thres)
	432	touch->no_data_count++;
	433	else
	434	delay = NO_DATA_SLEEP_MSECS;
	435	}
	436	return msecs_to_jiffies(delay);
	437	} else {
	438	delay = msecs_to_jiffies(THREAD_IRQ_SLEEP_MSECS);
	439	return round_jiffies_relative(delay);
	440	}
	441	}
	442
	443	/* Work Handler */
	444	static void synaptics_i2c_work_handler(struct work_struct *work)
	445	{
	446	bool have_data;
	447	struct synaptics_i2c *touch =
	448	container_of(work, struct synaptics_i2c, dwork.work);
	449	unsigned long delay;
	450
	451	synaptics_i2c_check_params(touch);
	452
	453	have_data = synaptics_i2c_get_input(touch);
	454	delay = synaptics_i2c_adjust_delay(touch, have_data);
	455
	456	/*
	457	* While interrupt driven, there is no real need to poll the device.
	458	* But touchpads are very sensitive, so there could be errors
	459	* related to physical environment and the attention line isn't
25985edc	460	* necessarily asserted. In such case we can lose the touchpad.
eef3e4ca MR	461	* We poll the device once in THREAD_IRQ_SLEEP_SECS and
	462	* if error is detected, we try to reset and reconfigure the touchpad.
	463	*/
30b37131	464	synaptics_i2c_reschedule_work(touch, delay);
eef3e4ca MR	465	}
	466
	467	static int synaptics_i2c_open(struct input_dev *input)
	468	{
	469	struct synaptics_i2c *touch = input_get_drvdata(input);
	470	int ret;
	471
	472	ret = synaptics_i2c_reset_config(touch->client);
	473	if (ret)
	474	return ret;
	475
	476	if (polling_req)
30b37131 DT	477	synaptics_i2c_reschedule_work(touch,
30b37131 DT	478	msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
eef3e4ca MR	479
	480	return 0;
	481	}
	482
	483	static void synaptics_i2c_close(struct input_dev *input)
	484	{
	485	struct synaptics_i2c *touch = input_get_drvdata(input);
	486
	487	if (!polling_req)
	488	synaptics_i2c_reg_set(touch->client, INTERRUPT_EN_REG, 0);
	489
	490	cancel_delayed_work_sync(&touch->dwork);
	491
	492	/* Save some power */
	493	synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
	494	}
	495
	496	static void synaptics_i2c_set_input_params(struct synaptics_i2c *touch)
	497	{
	498	struct input_dev *input = touch->input;
	499
	500	input->name = touch->client->name;
	501	input->phys = touch->client->adapter->name;
	502	input->id.bustype = BUS_I2C;
	503	input->id.version = synaptics_i2c_word_get(touch->client,
	504	INFO_QUERY_REG0);
	505	input->dev.parent = &touch->client->dev;
	506	input->open = synaptics_i2c_open;
	507	input->close = synaptics_i2c_close;
	508	input_set_drvdata(input, touch);
	509
	510	/* Register the device as mouse */
	511	__set_bit(EV_REL, input->evbit);
	512	__set_bit(REL_X, input->relbit);
	513	__set_bit(REL_Y, input->relbit);
	514
	515	/* Register device's buttons and keys */
	516	__set_bit(EV_KEY, input->evbit);
	517	__set_bit(BTN_LEFT, input->keybit);
	518	}
	519
f5ba3502	520	static struct synaptics_i2c synaptics_i2c_touch_create(struct i2c_client client)
eef3e4ca MR	521	{
	522	struct synaptics_i2c *touch;
	523
	524	touch = kzalloc(sizeof(struct synaptics_i2c), GFP_KERNEL);
	525	if (!touch)
	526	return NULL;
	527
	528	touch->client = client;
	529	touch->no_decel_param = no_decel;
	530	touch->scan_rate_param = scan_rate;
	531	set_scan_rate(touch, scan_rate);
	532	INIT_DELAYED_WORK(&touch->dwork, synaptics_i2c_work_handler);
30b37131	533	spin_lock_init(&touch->lock);
eef3e4ca MR	534
	535	return touch;
	536	}
	537
5298cc4c	538	static int synaptics_i2c_probe(struct i2c_client *client,
eef3e4ca MR	539	const struct i2c_device_id *dev_id)
	540	{
	541	int ret;
	542	struct synaptics_i2c *touch;
	543
	544	touch = synaptics_i2c_touch_create(client);
	545	if (!touch)
	546	return -ENOMEM;
	547
eef3e4ca MR	548	ret = synaptics_i2c_reset_config(client);
	549	if (ret)
	550	goto err_mem_free;
	551
	552	if (client->irq < 1)
30b37131	553	polling_req = true;
eef3e4ca MR	554
	555	touch->input = input_allocate_device();
	556	if (!touch->input) {
	557	ret = -ENOMEM;
	558	goto err_mem_free;
	559	}
	560
	561	synaptics_i2c_set_input_params(touch);
	562
	563	if (!polling_req) {
	564	dev_dbg(&touch->client->dev,
	565	"Requesting IRQ: %d\n", touch->client->irq);
	566
	567	ret = request_irq(touch->client->irq, synaptics_i2c_irq,
ec4665c4	568	IRQ_TYPE_EDGE_FALLING,
eef3e4ca MR	569	DRIVER_NAME, touch);
	570	if (ret) {
	571	dev_warn(&touch->client->dev,
	572	"IRQ request failed: %d, "
	573	"falling back to polling\n", ret);
30b37131	574	polling_req = true;
eef3e4ca MR	575	synaptics_i2c_reg_set(touch->client,
	576	INTERRUPT_EN_REG, 0);
	577	}
	578	}
	579
	580	if (polling_req)
	581	dev_dbg(&touch->client->dev,
	582	"Using polling at rate: %d times/sec\n", scan_rate);
	583
	584	/* Register the device in input subsystem */
	585	ret = input_register_device(touch->input);
	586	if (ret) {
	587	dev_err(&client->dev,
	588	"Input device register failed: %d\n", ret);
	589	goto err_input_free;
	590	}
30b37131 DT	591
	592	i2c_set_clientdata(client, touch);
	593
eef3e4ca MR	594	return 0;
	595
	596	err_input_free:
	597	input_free_device(touch->input);
	598	err_mem_free:
eef3e4ca MR	599	kfree(touch);
	600
	601	return ret;
	602	}
	603
e2619cf7	604	static int synaptics_i2c_remove(struct i2c_client *client)
eef3e4ca MR	605	{
	606	struct synaptics_i2c *touch = i2c_get_clientdata(client);
	607
	608	if (!polling_req)
30b37131	609	free_irq(client->irq, touch);
eef3e4ca MR	610
eef3e4ca MR	611	input_unregister_device(touch->input);
eef3e4ca MR	612	kfree(touch);
	613
	614	return 0;
	615	}
	616
572081a4	617	static int __maybe_unused synaptics_i2c_suspend(struct device *dev)
eef3e4ca	618	{
87b2c7df	619	struct i2c_client *client = to_i2c_client(dev);
eef3e4ca MR	620	struct synaptics_i2c *touch = i2c_get_clientdata(client);
	621
	622	cancel_delayed_work_sync(&touch->dwork);
	623
	624	/* Save some power */
	625	synaptics_i2c_reg_set(touch->client, DEV_CONTROL_REG, DEEP_SLEEP);
	626
	627	return 0;
	628	}
	629
572081a4	630	static int __maybe_unused synaptics_i2c_resume(struct device *dev)
eef3e4ca MR	631	{
eef3e4ca MR	632	int ret;
87b2c7df	633	struct i2c_client *client = to_i2c_client(dev);
eef3e4ca MR	634	struct synaptics_i2c *touch = i2c_get_clientdata(client);
	635
	636	ret = synaptics_i2c_reset_config(client);
	637	if (ret)
	638	return ret;
	639
30b37131 DT	640	synaptics_i2c_reschedule_work(touch,
30b37131 DT	641	msecs_to_jiffies(NO_DATA_SLEEP_MSECS));
eef3e4ca MR	642
	643	return 0;
	644	}
eef3e4ca	645
87b2c7df MB	646	static SIMPLE_DEV_PM_OPS(synaptics_i2c_pm, synaptics_i2c_suspend,
	647	synaptics_i2c_resume);
	648
eef3e4ca MR	649	static const struct i2c_device_id synaptics_i2c_id_table[] = {
	650	{ "synaptics_i2c", 0 },
	651	{ },
	652	};
	653	MODULE_DEVICE_TABLE(i2c, synaptics_i2c_id_table);
	654
	655	static struct i2c_driver synaptics_i2c_driver = {
	656	.driver = {
	657	.name = DRIVER_NAME,
87b2c7df	658	.pm = &synaptics_i2c_pm,
eef3e4ca MR	659	},
	660
	661	.probe = synaptics_i2c_probe,
1cb0aa88	662	.remove = synaptics_i2c_remove,
eef3e4ca	663
eef3e4ca MR	664	.id_table = synaptics_i2c_id_table,
	665	};
	666
1b92c1cf	667	module_i2c_driver(synaptics_i2c_driver);
eef3e4ca MR	668
	669	MODULE_DESCRIPTION("Synaptics I2C touchpad driver");
	670	MODULE_AUTHOR("Mike Rapoport, Igor Grinberg, Compulab");
	671	MODULE_LICENSE("GPL");
	672