[mirror_ubuntu-jammy-kernel.git] / drivers / input / touchscreen / auo-pixcir-ts.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Driver for AUO in-cell touchscreens
 *
 * Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de>
 *
 * loosely based on auo_touch.c from Dell Streak vendor-kernel
 *
 * Copyright (c) 2008 QUALCOMM Incorporated.
 * Copyright (c) 2008 QUALCOMM USA, INC.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/input/auo-pixcir-ts.h>
#include <linux/of.h>
#include <linux/of_gpio.h>

/*
 * Coordinate calculation:
 * X1 = X1_LSB + X1_MSB*256
 * Y1 = Y1_LSB + Y1_MSB*256
 * X2 = X2_LSB + X2_MSB*256
 * Y2 = Y2_LSB + Y2_MSB*256
 */
#define AUO_PIXCIR_REG_X1_LSB		0x00
#define AUO_PIXCIR_REG_X1_MSB		0x01
#define AUO_PIXCIR_REG_Y1_LSB		0x02
#define AUO_PIXCIR_REG_Y1_MSB		0x03
#define AUO_PIXCIR_REG_X2_LSB		0x04
#define AUO_PIXCIR_REG_X2_MSB		0x05
#define AUO_PIXCIR_REG_Y2_LSB		0x06
#define AUO_PIXCIR_REG_Y2_MSB		0x07

#define AUO_PIXCIR_REG_STRENGTH		0x0d
#define AUO_PIXCIR_REG_STRENGTH_X1_LSB	0x0e
#define AUO_PIXCIR_REG_STRENGTH_X1_MSB	0x0f

#define AUO_PIXCIR_REG_RAW_DATA_X	0x2b
#define AUO_PIXCIR_REG_RAW_DATA_Y	0x4f

#define AUO_PIXCIR_REG_X_SENSITIVITY	0x6f
#define AUO_PIXCIR_REG_Y_SENSITIVITY	0x70
#define AUO_PIXCIR_REG_INT_SETTING	0x71
#define AUO_PIXCIR_REG_INT_WIDTH	0x72
#define AUO_PIXCIR_REG_POWER_MODE	0x73

#define AUO_PIXCIR_REG_VERSION		0x77
#define AUO_PIXCIR_REG_CALIBRATE	0x78

#define AUO_PIXCIR_REG_TOUCHAREA_X1	0x1e
#define AUO_PIXCIR_REG_TOUCHAREA_Y1	0x1f
#define AUO_PIXCIR_REG_TOUCHAREA_X2	0x20
#define AUO_PIXCIR_REG_TOUCHAREA_Y2	0x21

#define AUO_PIXCIR_REG_EEPROM_CALIB_X	0x42
#define AUO_PIXCIR_REG_EEPROM_CALIB_Y	0xad

#define AUO_PIXCIR_INT_TPNUM_MASK	0xe0
#define AUO_PIXCIR_INT_TPNUM_SHIFT	5
#define AUO_PIXCIR_INT_RELEASE		(1 << 4)
#define AUO_PIXCIR_INT_ENABLE		(1 << 3)
#define AUO_PIXCIR_INT_POL_HIGH		(1 << 2)
#define AUO_PIXCIR_INT_MODE_MASK	0x03

/*
 * Power modes:
 * active:	scan speed 60Hz
 * sleep:	scan speed 10Hz can be auto-activated, wakeup on 1st touch
 * deep sleep:	scan speed 1Hz can only be entered or left manually.
 */
#define AUO_PIXCIR_POWER_ACTIVE		0x00
#define AUO_PIXCIR_POWER_SLEEP		0x01
#define AUO_PIXCIR_POWER_DEEP_SLEEP	0x02
#define AUO_PIXCIR_POWER_MASK		0x03

#define AUO_PIXCIR_POWER_ALLOW_SLEEP	(1 << 2)
#define AUO_PIXCIR_POWER_IDLE_TIME(ms)	((ms & 0xf) << 4)

#define AUO_PIXCIR_CALIBRATE		0x03

#define AUO_PIXCIR_EEPROM_CALIB_X_LEN	62
#define AUO_PIXCIR_EEPROM_CALIB_Y_LEN	36

#define AUO_PIXCIR_RAW_DATA_X_LEN	18
#define AUO_PIXCIR_RAW_DATA_Y_LEN	11

#define AUO_PIXCIR_STRENGTH_ENABLE	(1 << 0)

/* Touchscreen absolute values */
#define AUO_PIXCIR_REPORT_POINTS	2
#define AUO_PIXCIR_MAX_AREA		0xff
#define AUO_PIXCIR_PENUP_TIMEOUT_MS	10

struct auo_pixcir_ts {
	struct i2c_client	*client;
	struct input_dev	*input;
	const struct auo_pixcir_ts_platdata *pdata;
	char			phys[32];

	/* special handling for touch_indicate interupt mode */
	bool			touch_ind_mode;

	wait_queue_head_t	wait;
	bool			stopped;
};

struct auo_point_t {
	int	coord_x;
	int	coord_y;
	int	area_major;
	int	area_minor;
	int	orientation;
};

static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts,
				   struct auo_point_t *point)
{
	struct i2c_client *client = ts->client;
	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
	uint8_t raw_coord[8];
	uint8_t raw_area[4];
	int i, ret;

	/* touch coordinates */
	ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB,
					    8, raw_coord);
	if (ret < 0) {
		dev_err(&client->dev, "failed to read coordinate, %d\n", ret);
		return ret;
	}

	/* touch area */
	ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1,
					    4, raw_area);
	if (ret < 0) {
		dev_err(&client->dev, "could not read touch area, %d\n", ret);
		return ret;
	}

	for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) {
		point[i].coord_x =
			raw_coord[4 * i + 1] << 8 | raw_coord[4 * i];
		point[i].coord_y =
			raw_coord[4 * i + 3] << 8 | raw_coord[4 * i + 2];

		if (point[i].coord_x > pdata->x_max ||
		    point[i].coord_y > pdata->y_max) {
			dev_warn(&client->dev, "coordinates (%d,%d) invalid\n",
				point[i].coord_x, point[i].coord_y);
			point[i].coord_x = point[i].coord_y = 0;
		}

		/* determine touch major, minor and orientation */
		point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]);
		point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]);
		point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1];
	}

	return 0;
}

static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id)
{
	struct auo_pixcir_ts *ts = dev_id;
	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
	struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS];
	int i;
	int ret;
	int fingers = 0;
	int abs = -1;

	while (!ts->stopped) {

		/* check for up event in touch touch_ind_mode */
		if (ts->touch_ind_mode) {
			if (gpio_get_value(pdata->gpio_int) == 0) {
				input_mt_sync(ts->input);
				input_report_key(ts->input, BTN_TOUCH, 0);
				input_sync(ts->input);
				break;
			}
		}

		ret = auo_pixcir_collect_data(ts, point);
		if (ret < 0) {
			/* we want to loop only in touch_ind_mode */
			if (!ts->touch_ind_mode)
				break;

			wait_event_timeout(ts->wait, ts->stopped,
				msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS));
			continue;
		}

		for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) {
			if (point[i].coord_x > 0 || point[i].coord_y > 0) {
				input_report_abs(ts->input, ABS_MT_POSITION_X,
						 point[i].coord_x);
				input_report_abs(ts->input, ABS_MT_POSITION_Y,
						 point[i].coord_y);
				input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR,
						 point[i].area_major);
				input_report_abs(ts->input, ABS_MT_TOUCH_MINOR,
						 point[i].area_minor);
				input_report_abs(ts->input, ABS_MT_ORIENTATION,
						 point[i].orientation);
				input_mt_sync(ts->input);

				/* use first finger as source for singletouch */
				if (fingers == 0)
					abs = i;

				/* number of touch points could also be queried
				 * via i2c but would require an additional call
				 */
				fingers++;
			}
		}

		input_report_key(ts->input, BTN_TOUCH, fingers > 0);

		if (abs > -1) {
			input_report_abs(ts->input, ABS_X, point[abs].coord_x);
			input_report_abs(ts->input, ABS_Y, point[abs].coord_y);
		}

		input_sync(ts->input);

		/* we want to loop only in touch_ind_mode */
		if (!ts->touch_ind_mode)
			break;

		wait_event_timeout(ts->wait, ts->stopped,
				 msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS));
	}

	return IRQ_HANDLED;
}

/*
 * Set the power mode of the device.
 * Valid modes are
 * - AUO_PIXCIR_POWER_ACTIVE
 * - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch
 * - AUO_PIXCIR_POWER_DEEP_SLEEP
 */
static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode)
{
	struct i2c_client *client = ts->client;
	int ret;

	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE);
	if (ret < 0) {
		dev_err(&client->dev, "unable to read reg %Xh, %d\n",
			AUO_PIXCIR_REG_POWER_MODE, ret);
		return ret;
	}

	ret &= ~AUO_PIXCIR_POWER_MASK;
	ret |= mode;

	ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret);
	if (ret) {
		dev_err(&client->dev, "unable to write reg %Xh, %d\n",
			AUO_PIXCIR_REG_POWER_MODE, ret);
		return ret;
	}

	return 0;
}

static int auo_pixcir_int_config(struct auo_pixcir_ts *ts,
					   int int_setting)
{
	struct i2c_client *client = ts->client;
	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
	int ret;

	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
	if (ret < 0) {
		dev_err(&client->dev, "unable to read reg %Xh, %d\n",
			AUO_PIXCIR_REG_INT_SETTING, ret);
		return ret;
	}

	ret &= ~AUO_PIXCIR_INT_MODE_MASK;
	ret |= int_setting;
	ret |= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */

	ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING,
					ret);
	if (ret < 0) {
		dev_err(&client->dev, "unable to write reg %Xh, %d\n",
			AUO_PIXCIR_REG_INT_SETTING, ret);
		return ret;
	}

	ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND;

	return 0;
}

/* control the generation of interrupts on the device side */
static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable)
{
	struct i2c_client *client = ts->client;
	int ret;

	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
	if (ret < 0) {
		dev_err(&client->dev, "unable to read reg %Xh, %d\n",
			AUO_PIXCIR_REG_INT_SETTING, ret);
		return ret;
	}

	if (enable)
		ret |= AUO_PIXCIR_INT_ENABLE;
	else
		ret &= ~AUO_PIXCIR_INT_ENABLE;

	ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING,
					ret);
	if (ret < 0) {
		dev_err(&client->dev, "unable to write reg %Xh, %d\n",
			AUO_PIXCIR_REG_INT_SETTING, ret);
		return ret;
	}

	return 0;
}

static int auo_pixcir_start(struct auo_pixcir_ts *ts)
{
	struct i2c_client *client = ts->client;
	int ret;

	ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE);
	if (ret < 0) {
		dev_err(&client->dev, "could not set power mode, %d\n",
			ret);
		return ret;
	}

	ts->stopped = false;
	mb();
	enable_irq(client->irq);

	ret = auo_pixcir_int_toggle(ts, 1);
	if (ret < 0) {
		dev_err(&client->dev, "could not enable interrupt, %d\n",
			ret);
		disable_irq(client->irq);
		return ret;
	}

	return 0;
}

static int auo_pixcir_stop(struct auo_pixcir_ts *ts)
{
	struct i2c_client *client = ts->client;
	int ret;

	ret = auo_pixcir_int_toggle(ts, 0);
	if (ret < 0) {
		dev_err(&client->dev, "could not disable interrupt, %d\n",
			ret);
		return ret;
	}

	/* disable receiving of interrupts */
	disable_irq(client->irq);
	ts->stopped = true;
	mb();
	wake_up(&ts->wait);

	return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP);
}

static int auo_pixcir_input_open(struct input_dev *dev)
{
	struct auo_pixcir_ts *ts = input_get_drvdata(dev);

	return auo_pixcir_start(ts);
}

static void auo_pixcir_input_close(struct input_dev *dev)
{
	struct auo_pixcir_ts *ts = input_get_drvdata(dev);

	auo_pixcir_stop(ts);
}

static int __maybe_unused auo_pixcir_suspend(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
	struct input_dev *input = ts->input;
	int ret = 0;

	mutex_lock(&input->mutex);

	/* when configured as wakeup source, device should always wake system
	 * therefore start device if necessary
	 */
	if (device_may_wakeup(&client->dev)) {
		/* need to start device if not open, to be wakeup source */
		if (!input_device_enabled(input)) {
			ret = auo_pixcir_start(ts);
			if (ret)
				goto unlock;
		}

		enable_irq_wake(client->irq);
		ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP);
	} else if (input_device_enabled(input)) {
		ret = auo_pixcir_stop(ts);
	}

unlock:
	mutex_unlock(&input->mutex);

	return ret;
}

static int __maybe_unused auo_pixcir_resume(struct device *dev)
{
	struct i2c_client *client = to_i2c_client(dev);
	struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
	struct input_dev *input = ts->input;
	int ret = 0;

	mutex_lock(&input->mutex);

	if (device_may_wakeup(&client->dev)) {
		disable_irq_wake(client->irq);

		/* need to stop device if it was not open on suspend */
		if (!input_device_enabled(input)) {
			ret = auo_pixcir_stop(ts);
			if (ret)
				goto unlock;
		}

		/* device wakes automatically from SLEEP */
	} else if (input_device_enabled(input)) {
		ret = auo_pixcir_start(ts);
	}

unlock:
	mutex_unlock(&input->mutex);

	return ret;
}

static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops,
			 auo_pixcir_suspend, auo_pixcir_resume);

#ifdef CONFIG_OF
static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
{
	struct auo_pixcir_ts_platdata *pdata;
	struct device_node *np = dev->of_node;

	if (!np)
		return ERR_PTR(-ENOENT);

	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
	if (!pdata)
		return ERR_PTR(-ENOMEM);

	pdata->gpio_int = of_get_gpio(np, 0);
	if (!gpio_is_valid(pdata->gpio_int)) {
		dev_err(dev, "failed to get interrupt gpio\n");
		return ERR_PTR(-EINVAL);
	}

	pdata->gpio_rst = of_get_gpio(np, 1);
	if (!gpio_is_valid(pdata->gpio_rst)) {
		dev_err(dev, "failed to get reset gpio\n");
		return ERR_PTR(-EINVAL);
	}

	if (of_property_read_u32(np, "x-size", &pdata->x_max)) {
		dev_err(dev, "failed to get x-size property\n");
		return ERR_PTR(-EINVAL);
	}

	if (of_property_read_u32(np, "y-size", &pdata->y_max)) {
		dev_err(dev, "failed to get y-size property\n");
		return ERR_PTR(-EINVAL);
	}

	/* default to asserting the interrupt when the screen is touched */
	pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND;

	return pdata;
}
#else
static struct auo_pixcir_ts_platdata *auo_pixcir_parse_dt(struct device *dev)
{
	return ERR_PTR(-EINVAL);
}
#endif

static void auo_pixcir_reset(void *data)
{
	struct auo_pixcir_ts *ts = data;

	gpio_set_value(ts->pdata->gpio_rst, 0);
}

static int auo_pixcir_probe(struct i2c_client *client,
			    const struct i2c_device_id *id)
{
	const struct auo_pixcir_ts_platdata *pdata;
	struct auo_pixcir_ts *ts;
	struct input_dev *input_dev;
	int version;
	int error;

	pdata = dev_get_platdata(&client->dev);
	if (!pdata) {
		pdata = auo_pixcir_parse_dt(&client->dev);
		if (IS_ERR(pdata))
			return PTR_ERR(pdata);
	}

	ts = devm_kzalloc(&client->dev,
			  sizeof(struct auo_pixcir_ts), GFP_KERNEL);
	if (!ts)
		return -ENOMEM;

	input_dev = devm_input_allocate_device(&client->dev);
	if (!input_dev) {
		dev_err(&client->dev, "could not allocate input device\n");
		return -ENOMEM;
	}

	ts->pdata = pdata;
	ts->client = client;
	ts->input = input_dev;
	ts->touch_ind_mode = 0;
	ts->stopped = true;
	init_waitqueue_head(&ts->wait);

	snprintf(ts->phys, sizeof(ts->phys),
		 "%s/input0", dev_name(&client->dev));

	input_dev->name = "AUO-Pixcir touchscreen";
	input_dev->phys = ts->phys;
	input_dev->id.bustype = BUS_I2C;

	input_dev->open = auo_pixcir_input_open;
	input_dev->close = auo_pixcir_input_close;

	__set_bit(EV_ABS, input_dev->evbit);
	__set_bit(EV_KEY, input_dev->evbit);

	__set_bit(BTN_TOUCH, input_dev->keybit);

	/* For single touch */
	input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0);
	input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0);

	/* For multi touch */
	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
			     pdata->x_max, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
			     pdata->y_max, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0,
			     AUO_PIXCIR_MAX_AREA, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0,
			     AUO_PIXCIR_MAX_AREA, 0, 0);
	input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);

	input_set_drvdata(ts->input, ts);

	error = devm_gpio_request_one(&client->dev, pdata->gpio_int,
				      GPIOF_DIR_IN, "auo_pixcir_ts_int");
	if (error) {
		dev_err(&client->dev, "request of gpio %d failed, %d\n",
			pdata->gpio_int, error);
		return error;
	}

	error = devm_gpio_request_one(&client->dev, pdata->gpio_rst,
				      GPIOF_DIR_OUT | GPIOF_INIT_HIGH,
				      "auo_pixcir_ts_rst");
	if (error) {
		dev_err(&client->dev, "request of gpio %d failed, %d\n",
			pdata->gpio_rst, error);
		return error;
	}

	error = devm_add_action_or_reset(&client->dev, auo_pixcir_reset, ts);
	if (error) {
		dev_err(&client->dev, "failed to register reset action, %d\n",
			error);
		return error;
	}

	msleep(200);

	version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION);
	if (version < 0) {
		error = version;
		return error;
	}

	dev_info(&client->dev, "firmware version 0x%X\n", version);

	error = auo_pixcir_int_config(ts, pdata->int_setting);
	if (error)
		return error;

	error = devm_request_threaded_irq(&client->dev, client->irq,
					  NULL, auo_pixcir_interrupt,
					  IRQF_TRIGGER_RISING | IRQF_ONESHOT,
					  input_dev->name, ts);
	if (error) {
		dev_err(&client->dev, "irq %d requested failed, %d\n",
			client->irq, error);
		return error;
	}

	/* stop device and put it into deep sleep until it is opened */
	error = auo_pixcir_stop(ts);
	if (error)
		return error;

	error = input_register_device(input_dev);
	if (error) {
		dev_err(&client->dev, "could not register input device, %d\n",
			error);
		return error;
	}

	i2c_set_clientdata(client, ts);

	return 0;
}

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

#ifdef CONFIG_OF
static const struct of_device_id auo_pixcir_ts_dt_idtable[] = {
	{ .compatible = "auo,auo_pixcir_ts" },
	{},
};
MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable);
#endif

static struct i2c_driver auo_pixcir_driver = {
	.driver = {
		.name	= "auo_pixcir_ts",
		.pm	= &auo_pixcir_pm_ops,
		.of_match_table	= of_match_ptr(auo_pixcir_ts_dt_idtable),
	},
	.probe		= auo_pixcir_probe,
	.id_table	= auo_pixcir_idtable,
};

module_i2c_driver(auo_pixcir_driver);

MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver");
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");
Commit	Line	Data
9c92ab61	1	// SPDX-License-Identifier: GPL-2.0-only
5245db49 HS	2	/*
	3	* Driver for AUO in-cell touchscreens
	4	*
	5	* Copyright (c) 2011 Heiko Stuebner <heiko@sntech.de>
	6	*
	7	* loosely based on auo_touch.c from Dell Streak vendor-kernel
	8	*
	9	* Copyright (c) 2008 QUALCOMM Incorporated.
	10	* Copyright (c) 2008 QUALCOMM USA, INC.
5245db49 HS	11	*/
	12
	13	#include <linux/kernel.h>
	14	#include <linux/module.h>
	15	#include <linux/interrupt.h>
	16	#include <linux/slab.h>
	17	#include <linux/input.h>
	18	#include <linux/jiffies.h>
	19	#include <linux/i2c.h>
	20	#include <linux/mutex.h>
	21	#include <linux/delay.h>
	22	#include <linux/gpio.h>
	23	#include <linux/input/auo-pixcir-ts.h>
7241443f HS	24	#include <linux/of.h>
7241443f HS	25	#include <linux/of_gpio.h>
5245db49 HS	26
	27	/*
	28	* Coordinate calculation:
	29	* X1 = X1_LSB + X1_MSB*256
	30	* Y1 = Y1_LSB + Y1_MSB*256
	31	* X2 = X2_LSB + X2_MSB*256
	32	* Y2 = Y2_LSB + Y2_MSB*256
	33	*/
	34	#define AUO_PIXCIR_REG_X1_LSB 0x00
	35	#define AUO_PIXCIR_REG_X1_MSB 0x01
	36	#define AUO_PIXCIR_REG_Y1_LSB 0x02
	37	#define AUO_PIXCIR_REG_Y1_MSB 0x03
	38	#define AUO_PIXCIR_REG_X2_LSB 0x04
	39	#define AUO_PIXCIR_REG_X2_MSB 0x05
	40	#define AUO_PIXCIR_REG_Y2_LSB 0x06
	41	#define AUO_PIXCIR_REG_Y2_MSB 0x07
	42
	43	#define AUO_PIXCIR_REG_STRENGTH 0x0d
	44	#define AUO_PIXCIR_REG_STRENGTH_X1_LSB 0x0e
	45	#define AUO_PIXCIR_REG_STRENGTH_X1_MSB 0x0f
	46
	47	#define AUO_PIXCIR_REG_RAW_DATA_X 0x2b
	48	#define AUO_PIXCIR_REG_RAW_DATA_Y 0x4f
	49
	50	#define AUO_PIXCIR_REG_X_SENSITIVITY 0x6f
	51	#define AUO_PIXCIR_REG_Y_SENSITIVITY 0x70
	52	#define AUO_PIXCIR_REG_INT_SETTING 0x71
	53	#define AUO_PIXCIR_REG_INT_WIDTH 0x72
	54	#define AUO_PIXCIR_REG_POWER_MODE 0x73
	55
	56	#define AUO_PIXCIR_REG_VERSION 0x77
	57	#define AUO_PIXCIR_REG_CALIBRATE 0x78
	58
	59	#define AUO_PIXCIR_REG_TOUCHAREA_X1 0x1e
	60	#define AUO_PIXCIR_REG_TOUCHAREA_Y1 0x1f
	61	#define AUO_PIXCIR_REG_TOUCHAREA_X2 0x20
	62	#define AUO_PIXCIR_REG_TOUCHAREA_Y2 0x21
	63
	64	#define AUO_PIXCIR_REG_EEPROM_CALIB_X 0x42
	65	#define AUO_PIXCIR_REG_EEPROM_CALIB_Y 0xad
	66
	67	#define AUO_PIXCIR_INT_TPNUM_MASK 0xe0
	68	#define AUO_PIXCIR_INT_TPNUM_SHIFT 5
	69	#define AUO_PIXCIR_INT_RELEASE (1 << 4)
	70	#define AUO_PIXCIR_INT_ENABLE (1 << 3)
	71	#define AUO_PIXCIR_INT_POL_HIGH (1 << 2)
	72	#define AUO_PIXCIR_INT_MODE_MASK 0x03
	73
	74	/*
	75	* Power modes:
	76	* active: scan speed 60Hz
	77	* sleep: scan speed 10Hz can be auto-activated, wakeup on 1st touch
	78	* deep sleep: scan speed 1Hz can only be entered or left manually.
	79	*/
	80	#define AUO_PIXCIR_POWER_ACTIVE 0x00
	81	#define AUO_PIXCIR_POWER_SLEEP 0x01
	82	#define AUO_PIXCIR_POWER_DEEP_SLEEP 0x02
	83	#define AUO_PIXCIR_POWER_MASK 0x03
	84
	85	#define AUO_PIXCIR_POWER_ALLOW_SLEEP (1 << 2)
	86	#define AUO_PIXCIR_POWER_IDLE_TIME(ms) ((ms & 0xf) << 4)
	87
	88	#define AUO_PIXCIR_CALIBRATE 0x03
	89
90	#define AUO_PIXCIR_EEPROM_CALIB_X_LEN 62
91	#define AUO_PIXCIR_EEPROM_CALIB_Y_LEN 36
92
93	#define AUO_PIXCIR_RAW_DATA_X_LEN 18
94	#define AUO_PIXCIR_RAW_DATA_Y_LEN 11
95
96	#define AUO_PIXCIR_STRENGTH_ENABLE (1 << 0)
97
98	/* Touchscreen absolute values */
99	#define AUO_PIXCIR_REPORT_POINTS 2
100	#define AUO_PIXCIR_MAX_AREA 0xff
101	#define AUO_PIXCIR_PENUP_TIMEOUT_MS 10
102
103	struct auo_pixcir_ts {
104	struct i2c_client *client;
105	struct input_dev *input;
38e83f7f	106	const struct auo_pixcir_ts_platdata *pdata;
5245db49 HS	107	char phys[32];
	108
	109	/* special handling for touch_indicate interupt mode */
	110	bool touch_ind_mode;
	111
	112	wait_queue_head_t wait;
	113	bool stopped;
	114	};
	115
	116	struct auo_point_t {
	117	int coord_x;
	118	int coord_y;
	119	int area_major;
	120	int area_minor;
	121	int orientation;
	122	};
	123
	124	static int auo_pixcir_collect_data(struct auo_pixcir_ts *ts,
	125	struct auo_point_t *point)
	126	{
	127	struct i2c_client *client = ts->client;
38e83f7f	128	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
5245db49 HS	129	uint8_t raw_coord[8];
	130	uint8_t raw_area[4];
	131	int i, ret;
	132
	133	/* touch coordinates */
	134	ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_X1_LSB,
	135	8, raw_coord);
	136	if (ret < 0) {
	137	dev_err(&client->dev, "failed to read coordinate, %d\n", ret);
	138	return ret;
	139	}
	140
	141	/* touch area */
	142	ret = i2c_smbus_read_i2c_block_data(client, AUO_PIXCIR_REG_TOUCHAREA_X1,
	143	4, raw_area);
	144	if (ret < 0) {
	145	dev_err(&client->dev, "could not read touch area, %d\n", ret);
	146	return ret;
	147	}
	148
	149	for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) {
	150	point[i].coord_x =
	151	raw_coord[4 * i + 1] << 8 \| raw_coord[4 * i];
	152	point[i].coord_y =
	153	raw_coord[4 * i + 3] << 8 \| raw_coord[4 * i + 2];
	154
	155	if (point[i].coord_x > pdata->x_max \|\|
	156	point[i].coord_y > pdata->y_max) {
	157	dev_warn(&client->dev, "coordinates (%d,%d) invalid\n",
	158	point[i].coord_x, point[i].coord_y);
	159	point[i].coord_x = point[i].coord_y = 0;
	160	}
	161
	162	/* determine touch major, minor and orientation */
	163	point[i].area_major = max(raw_area[2 * i], raw_area[2 * i + 1]);
	164	point[i].area_minor = min(raw_area[2 * i], raw_area[2 * i + 1]);
	165	point[i].orientation = raw_area[2 * i] > raw_area[2 * i + 1];
	166	}
	167
	168	return 0;
	169	}
	170
	171	static irqreturn_t auo_pixcir_interrupt(int irq, void *dev_id)
	172	{
	173	struct auo_pixcir_ts *ts = dev_id;
38e83f7f	174	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
5245db49 HS	175	struct auo_point_t point[AUO_PIXCIR_REPORT_POINTS];
	176	int i;
	177	int ret;
	178	int fingers = 0;
	179	int abs = -1;
	180
	181	while (!ts->stopped) {
	182
	183	/* check for up event in touch touch_ind_mode */
	184	if (ts->touch_ind_mode) {
	185	if (gpio_get_value(pdata->gpio_int) == 0) {
	186	input_mt_sync(ts->input);
	187	input_report_key(ts->input, BTN_TOUCH, 0);
	188	input_sync(ts->input);
	189	break;
	190	}
	191	}
	192
	193	ret = auo_pixcir_collect_data(ts, point);
	194	if (ret < 0) {
	195	/* we want to loop only in touch_ind_mode */
	196	if (!ts->touch_ind_mode)
	197	break;
	198
	199	wait_event_timeout(ts->wait, ts->stopped,
	200	msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS));
	201	continue;
	202	}
	203
	204	for (i = 0; i < AUO_PIXCIR_REPORT_POINTS; i++) {
	205	if (point[i].coord_x > 0 \|\| point[i].coord_y > 0) {
	206	input_report_abs(ts->input, ABS_MT_POSITION_X,
	207	point[i].coord_x);
	208	input_report_abs(ts->input, ABS_MT_POSITION_Y,
	209	point[i].coord_y);
	210	input_report_abs(ts->input, ABS_MT_TOUCH_MAJOR,
	211	point[i].area_major);
	212	input_report_abs(ts->input, ABS_MT_TOUCH_MINOR,
	213	point[i].area_minor);
	214	input_report_abs(ts->input, ABS_MT_ORIENTATION,
	215	point[i].orientation);
	216	input_mt_sync(ts->input);
	217
	218	/* use first finger as source for singletouch */
	219	if (fingers == 0)
	220	abs = i;
	221
	222	/* number of touch points could also be queried
	223	* via i2c but would require an additional call
	224	*/
	225	fingers++;
	226	}
	227	}
	228
	229	input_report_key(ts->input, BTN_TOUCH, fingers > 0);
	230
	231	if (abs > -1) {
	232	input_report_abs(ts->input, ABS_X, point[abs].coord_x);
	233	input_report_abs(ts->input, ABS_Y, point[abs].coord_y);
	234	}
	235
	236	input_sync(ts->input);
	237
	238	/* we want to loop only in touch_ind_mode */
239	if (!ts->touch_ind_mode)
240	break;
241
242	wait_event_timeout(ts->wait, ts->stopped,
243	msecs_to_jiffies(AUO_PIXCIR_PENUP_TIMEOUT_MS));
244	}
245
246	return IRQ_HANDLED;
247	}
248
249	/*
250	* Set the power mode of the device.
251	* Valid modes are
252	* - AUO_PIXCIR_POWER_ACTIVE
253	* - AUO_PIXCIR_POWER_SLEEP - automatically left on first touch
254	* - AUO_PIXCIR_POWER_DEEP_SLEEP
255	*/
256	static int auo_pixcir_power_mode(struct auo_pixcir_ts *ts, int mode)
257	{
258	struct i2c_client *client = ts->client;
259	int ret;
260
261	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_POWER_MODE);
262	if (ret < 0) {
263	dev_err(&client->dev, "unable to read reg %Xh, %d\n",
264	AUO_PIXCIR_REG_POWER_MODE, ret);
265	return ret;
266	}
267
268	ret &= ~AUO_PIXCIR_POWER_MASK;
269	ret \|= mode;
270
271	ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_POWER_MODE, ret);
272	if (ret) {
273	dev_err(&client->dev, "unable to write reg %Xh, %d\n",
274	AUO_PIXCIR_REG_POWER_MODE, ret);
275	return ret;
276	}
277
278	return 0;
279	}
280
5298cc4c	281	static int auo_pixcir_int_config(struct auo_pixcir_ts *ts,
5245db49 HS	282	int int_setting)
	283	{
	284	struct i2c_client *client = ts->client;
38e83f7f	285	const struct auo_pixcir_ts_platdata *pdata = ts->pdata;
5245db49 HS	286	int ret;
	287
	288	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
	289	if (ret < 0) {
	290	dev_err(&client->dev, "unable to read reg %Xh, %d\n",
	291	AUO_PIXCIR_REG_INT_SETTING, ret);
	292	return ret;
	293	}
	294
	295	ret &= ~AUO_PIXCIR_INT_MODE_MASK;
	296	ret \|= int_setting;
	297	ret \|= AUO_PIXCIR_INT_POL_HIGH; /* always use high for interrupts */
	298
	299	ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING,
	300	ret);
	301	if (ret < 0) {
	302	dev_err(&client->dev, "unable to write reg %Xh, %d\n",
	303	AUO_PIXCIR_REG_INT_SETTING, ret);
	304	return ret;
	305	}
	306
	307	ts->touch_ind_mode = pdata->int_setting == AUO_PIXCIR_INT_TOUCH_IND;
	308
	309	return 0;
	310	}
	311
	312	/* control the generation of interrupts on the device side */
	313	static int auo_pixcir_int_toggle(struct auo_pixcir_ts *ts, bool enable)
	314	{
	315	struct i2c_client *client = ts->client;
	316	int ret;
	317
	318	ret = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_INT_SETTING);
	319	if (ret < 0) {
	320	dev_err(&client->dev, "unable to read reg %Xh, %d\n",
	321	AUO_PIXCIR_REG_INT_SETTING, ret);
	322	return ret;
	323	}
	324
	325	if (enable)
	326	ret \|= AUO_PIXCIR_INT_ENABLE;
	327	else
	328	ret &= ~AUO_PIXCIR_INT_ENABLE;
	329
	330	ret = i2c_smbus_write_byte_data(client, AUO_PIXCIR_REG_INT_SETTING,
	331	ret);
	332	if (ret < 0) {
	333	dev_err(&client->dev, "unable to write reg %Xh, %d\n",
	334	AUO_PIXCIR_REG_INT_SETTING, ret);
	335	return ret;
	336	}
	337
	338	return 0;
	339	}
	340
	341	static int auo_pixcir_start(struct auo_pixcir_ts *ts)
	342	{
	343	struct i2c_client *client = ts->client;
	344	int ret;
	345
	346	ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_ACTIVE);
	347	if (ret < 0) {
	348	dev_err(&client->dev, "could not set power mode, %d\n",
	349	ret);
350	return ret;
351	}
352
353	ts->stopped = false;
354	mb();
355	enable_irq(client->irq);
356
357	ret = auo_pixcir_int_toggle(ts, 1);
358	if (ret < 0) {
359	dev_err(&client->dev, "could not enable interrupt, %d\n",
360	ret);
361	disable_irq(client->irq);
362	return ret;
363	}
364
365	return 0;
366	}
367
368	static int auo_pixcir_stop(struct auo_pixcir_ts *ts)
369	{
370	struct i2c_client *client = ts->client;
371	int ret;
372
373	ret = auo_pixcir_int_toggle(ts, 0);
374	if (ret < 0) {
375	dev_err(&client->dev, "could not disable interrupt, %d\n",
376	ret);
377	return ret;
378	}
379
380	/* disable receiving of interrupts */
381	disable_irq(client->irq);
382	ts->stopped = true;
383	mb();
384	wake_up(&ts->wait);
385
386	return auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_DEEP_SLEEP);
387	}
388
389	static int auo_pixcir_input_open(struct input_dev *dev)
390	{
391	struct auo_pixcir_ts *ts = input_get_drvdata(dev);
5245db49	392
901ea5e3	393	return auo_pixcir_start(ts);
5245db49 HS	394	}
	395
	396	static void auo_pixcir_input_close(struct input_dev *dev)
	397	{
	398	struct auo_pixcir_ts *ts = input_get_drvdata(dev);
	399
	400	auo_pixcir_stop(ts);
5245db49 HS	401	}
5245db49 HS	402
02b6a58b	403	static int __maybe_unused auo_pixcir_suspend(struct device *dev)
5245db49 HS	404	{
	405	struct i2c_client *client = to_i2c_client(dev);
	406	struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
	407	struct input_dev *input = ts->input;
	408	int ret = 0;
	409
	410	mutex_lock(&input->mutex);
	411
	412	/* when configured as wakeup source, device should always wake system
	413	* therefore start device if necessary
	414	*/
	415	if (device_may_wakeup(&client->dev)) {
	416	/* need to start device if not open, to be wakeup source */
d69f0a43	417	if (!input_device_enabled(input)) {
5245db49 HS	418	ret = auo_pixcir_start(ts);
	419	if (ret)
	420	goto unlock;
	421	}
	422
	423	enable_irq_wake(client->irq);
	424	ret = auo_pixcir_power_mode(ts, AUO_PIXCIR_POWER_SLEEP);
d69f0a43	425	} else if (input_device_enabled(input)) {
5245db49 HS	426	ret = auo_pixcir_stop(ts);
	427	}
	428
	429	unlock:
	430	mutex_unlock(&input->mutex);
	431
	432	return ret;
	433	}
	434
02b6a58b	435	static int __maybe_unused auo_pixcir_resume(struct device *dev)
5245db49 HS	436	{
	437	struct i2c_client *client = to_i2c_client(dev);
	438	struct auo_pixcir_ts *ts = i2c_get_clientdata(client);
	439	struct input_dev *input = ts->input;
	440	int ret = 0;
	441
	442	mutex_lock(&input->mutex);
	443
	444	if (device_may_wakeup(&client->dev)) {
	445	disable_irq_wake(client->irq);
	446
	447	/* need to stop device if it was not open on suspend */
d69f0a43	448	if (!input_device_enabled(input)) {
5245db49 HS	449	ret = auo_pixcir_stop(ts);
	450	if (ret)
	451	goto unlock;
	452	}
	453
	454	/* device wakes automatically from SLEEP */
d69f0a43	455	} else if (input_device_enabled(input)) {
5245db49 HS	456	ret = auo_pixcir_start(ts);
	457	}
	458
	459	unlock:
	460	mutex_unlock(&input->mutex);
	461
	462	return ret;
	463	}
5245db49	464
7241443f HS	465	static SIMPLE_DEV_PM_OPS(auo_pixcir_pm_ops,
	466	auo_pixcir_suspend, auo_pixcir_resume);
	467
	468	#ifdef CONFIG_OF
	469	static struct auo_pixcir_ts_platdata auo_pixcir_parse_dt(struct device dev)
	470	{
	471	struct auo_pixcir_ts_platdata *pdata;
	472	struct device_node *np = dev->of_node;
	473
	474	if (!np)
	475	return ERR_PTR(-ENOENT);
	476
	477	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
eae7d90c	478	if (!pdata)
7241443f	479	return ERR_PTR(-ENOMEM);
7241443f HS	480
	481	pdata->gpio_int = of_get_gpio(np, 0);
	482	if (!gpio_is_valid(pdata->gpio_int)) {
	483	dev_err(dev, "failed to get interrupt gpio\n");
	484	return ERR_PTR(-EINVAL);
	485	}
	486
	487	pdata->gpio_rst = of_get_gpio(np, 1);
	488	if (!gpio_is_valid(pdata->gpio_rst)) {
	489	dev_err(dev, "failed to get reset gpio\n");
	490	return ERR_PTR(-EINVAL);
	491	}
	492
	493	if (of_property_read_u32(np, "x-size", &pdata->x_max)) {
	494	dev_err(dev, "failed to get x-size property\n");
	495	return ERR_PTR(-EINVAL);
	496	}
	497
	498	if (of_property_read_u32(np, "y-size", &pdata->y_max)) {
	499	dev_err(dev, "failed to get y-size property\n");
	500	return ERR_PTR(-EINVAL);
	501	}
	502
	503	/* default to asserting the interrupt when the screen is touched */
	504	pdata->int_setting = AUO_PIXCIR_INT_TOUCH_IND;
	505
	506	return pdata;
	507	}
	508	#else
	509	static struct auo_pixcir_ts_platdata auo_pixcir_parse_dt(struct device dev)
	510	{
	511	return ERR_PTR(-EINVAL);
	512	}
	513	#endif
5245db49	514
bfc29e95 DT	515	static void auo_pixcir_reset(void *data)
	516	{
	517	struct auo_pixcir_ts *ts = data;
	518
	519	gpio_set_value(ts->pdata->gpio_rst, 0);
	520	}
	521
5298cc4c	522	static int auo_pixcir_probe(struct i2c_client *client,
bfc29e95	523	const struct i2c_device_id *id)
5245db49	524	{
7241443f	525	const struct auo_pixcir_ts_platdata *pdata;
5245db49 HS	526	struct auo_pixcir_ts *ts;
5245db49 HS	527	struct input_dev *input_dev;
bfc29e95 DT	528	int version;
bfc29e95 DT	529	int error;
5245db49	530
7241443f HS	531	pdata = dev_get_platdata(&client->dev);
	532	if (!pdata) {
	533	pdata = auo_pixcir_parse_dt(&client->dev);
	534	if (IS_ERR(pdata))
	535	return PTR_ERR(pdata);
	536	}
5245db49	537
bfc29e95 DT	538	ts = devm_kzalloc(&client->dev,
bfc29e95 DT	539	sizeof(struct auo_pixcir_ts), GFP_KERNEL);
5245db49 HS	540	if (!ts)
	541	return -ENOMEM;
	542
bfc29e95 DT	543	input_dev = devm_input_allocate_device(&client->dev);
	544	if (!input_dev) {
	545	dev_err(&client->dev, "could not allocate input device\n");
	546	return -ENOMEM;
27cef8b4 HS	547	}
27cef8b4 HS	548
38e83f7f	549	ts->pdata = pdata;
5245db49	550	ts->client = client;
bfc29e95	551	ts->input = input_dev;
5245db49	552	ts->touch_ind_mode = 0;
bfc29e95	553	ts->stopped = true;
5245db49 HS	554	init_waitqueue_head(&ts->wait);
	555
	556	snprintf(ts->phys, sizeof(ts->phys),
	557	"%s/input0", dev_name(&client->dev));
	558
5245db49 HS	559	input_dev->name = "AUO-Pixcir touchscreen";
	560	input_dev->phys = ts->phys;
	561	input_dev->id.bustype = BUS_I2C;
5245db49 HS	562
	563	input_dev->open = auo_pixcir_input_open;
	564	input_dev->close = auo_pixcir_input_close;
	565
	566	__set_bit(EV_ABS, input_dev->evbit);
	567	__set_bit(EV_KEY, input_dev->evbit);
	568
	569	__set_bit(BTN_TOUCH, input_dev->keybit);
	570
	571	/* For single touch */
	572	input_set_abs_params(input_dev, ABS_X, 0, pdata->x_max, 0, 0);
	573	input_set_abs_params(input_dev, ABS_Y, 0, pdata->y_max, 0, 0);
	574
	575	/* For multi touch */
	576	input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
	577	pdata->x_max, 0, 0);
	578	input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
	579	pdata->y_max, 0, 0);
	580	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0,
	581	AUO_PIXCIR_MAX_AREA, 0, 0);
	582	input_set_abs_params(input_dev, ABS_MT_TOUCH_MINOR, 0,
	583	AUO_PIXCIR_MAX_AREA, 0, 0);
	584	input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
	585
5245db49	586	input_set_drvdata(ts->input, ts);
5245db49	587
bfc29e95 DT	588	error = devm_gpio_request_one(&client->dev, pdata->gpio_int,
	589	GPIOF_DIR_IN, "auo_pixcir_ts_int");
	590	if (error) {
	591	dev_err(&client->dev, "request of gpio %d failed, %d\n",
	592	pdata->gpio_int, error);
	593	return error;
5245db49 HS	594	}
5245db49 HS	595
bfc29e95 DT	596	error = devm_gpio_request_one(&client->dev, pdata->gpio_rst,
	597	GPIOF_DIR_OUT \| GPIOF_INIT_HIGH,
	598	"auo_pixcir_ts_rst");
	599	if (error) {
	600	dev_err(&client->dev, "request of gpio %d failed, %d\n",
	601	pdata->gpio_rst, error);
	602	return error;
5245db49 HS	603	}
5245db49 HS	604
e2c063c8	605	error = devm_add_action_or_reset(&client->dev, auo_pixcir_reset, ts);
bfc29e95	606	if (error) {
bfc29e95 DT	607	dev_err(&client->dev, "failed to register reset action, %d\n",
	608	error);
	609	return error;
	610	}
5245db49	611
bfc29e95	612	msleep(200);
5245db49	613
bfc29e95 DT	614	version = i2c_smbus_read_byte_data(client, AUO_PIXCIR_REG_VERSION);
	615	if (version < 0) {
	616	error = version;
	617	return error;
	618	}
5245db49	619
bfc29e95	620	dev_info(&client->dev, "firmware version 0x%X\n", version);
5245db49	621
bfc29e95 DT	622	error = auo_pixcir_int_config(ts, pdata->int_setting);
	623	if (error)
	624	return error;
5245db49	625
bfc29e95 DT	626	error = devm_request_threaded_irq(&client->dev, client->irq,
	627	NULL, auo_pixcir_interrupt,
	628	IRQF_TRIGGER_RISING \| IRQF_ONESHOT,
	629	input_dev->name, ts);
	630	if (error) {
	631	dev_err(&client->dev, "irq %d requested failed, %d\n",
	632	client->irq, error);
	633	return error;
	634	}
5245db49	635
bfc29e95 DT	636	/* stop device and put it into deep sleep until it is opened */
	637	error = auo_pixcir_stop(ts);
	638	if (error)
	639	return error;
	640
	641	error = input_register_device(input_dev);
	642	if (error) {
	643	dev_err(&client->dev, "could not register input device, %d\n",
	644	error);
	645	return error;
	646	}
5245db49	647
bfc29e95	648	i2c_set_clientdata(client, ts);
5245db49 HS	649
	650	return 0;
	651	}
	652
	653	static const struct i2c_device_id auo_pixcir_idtable[] = {
	654	{ "auo_pixcir_ts", 0 },
	655	{ }
	656	};
	657	MODULE_DEVICE_TABLE(i2c, auo_pixcir_idtable);
	658
7241443f	659	#ifdef CONFIG_OF
69f8cafd	660	static const struct of_device_id auo_pixcir_ts_dt_idtable[] = {
7241443f HS	661	{ .compatible = "auo,auo_pixcir_ts" },
	662	{},
	663	};
	664	MODULE_DEVICE_TABLE(of, auo_pixcir_ts_dt_idtable);
	665	#endif
	666
5245db49 HS	667	static struct i2c_driver auo_pixcir_driver = {
5245db49 HS	668	.driver = {
5245db49 HS	669	.name = "auo_pixcir_ts",
5245db49 HS	670	.pm = &auo_pixcir_pm_ops,
7241443f	671	.of_match_table = of_match_ptr(auo_pixcir_ts_dt_idtable),
5245db49 HS	672	},
5245db49 HS	673	.probe = auo_pixcir_probe,
5245db49 HS	674	.id_table = auo_pixcir_idtable,
	675	};
	676
4a533835	677	module_i2c_driver(auo_pixcir_driver);
5245db49 HS	678
	679	MODULE_DESCRIPTION("AUO-PIXCIR touchscreen driver");
	680	MODULE_LICENSE("GPL v2");
	681	MODULE_AUTHOR("Heiko Stuebner <heiko@sntech.de>");