drivers/input/touchscreen/touch_synaptics.c

/* Touch_synaptics.c
 *
 * Copyright (C) 2011 LGE.
 *
 * Author: yehan.ahn@lge.com, hyesung.shin@lge.com
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * 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.
 *
 */

#include <linux/err.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/slab.h>

#include <linux/gpio.h>

#include <linux/earlysuspend.h>
#include <linux/input/mt.h>
#include <linux/input/lge_touch_core.h>
#include <linux/input/touch_synaptics.h>

#include "SynaImage.h"
#include <linux/regulator/machine.h>

/* RMI4 spec from (RMI4 spec)511-000136-01_revD
 * Function     Purpose                                      See page
 * $01          RMI Device Control                              29
 * $08          BIST(Built-in Self Test)                        38
 * $09          BIST(Built-in Self Test)                        42
 * $11          2-D TouchPad sensors                            46
 * $19          0-D capacitive button sensors                   69
 * $30          GPIO/LEDs (includes mechanical buttons)         76
 * $32          Timer                                           89
 * $34          Flash Memory Management                         93
 */
#define RMI_DEVICE_CONTROL                      0x01
#define TOUCHPAD_SENSORS                        0x11
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
#define CAPACITIVE_BUTTON_SENSORS               0x1A
#define GPIO_LEDS                               0x31
#define ANALOG_CONTROL                          0x54
#else
#define CAPACITIVE_BUTTON_SENSORS               0x19
#define GPIO_LEDS                               0x30
#endif
#define TIMER                                   0x32
#define FLASH_MEMORY_MANAGEMENT                 0x34

/* Register Map & Register bit mask
 * - Please check "One time" this map before using this device driver
 */

#define MANUFACTURER_ID_REG (ts->common_dsc.query_base)    /* Manufacturer ID */
#define FW_REVISION_REG     (ts->common_dsc.query_base+3)  /* FW revision */
#define PRODUCT_ID_REG      (ts->common_dsc.query_base+11) /* Product ID */
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
#define FW_VERSION          (ts->flash_dsc.control_base)
#endif

#define DEVICE_CONTROL_REG (ts->common_dsc.control_base)  /* Device Control */
#define DEVICE_CONTROL_NORMAL_OP    0x00    /* sleep mode : go to doze mode after 500 ms */
#define DEVICE_CONTROL_SLEEP        0x01    /* sleep mode : go to sleep */
#define DEVICE_CONTROL_SPECIFIC     0x02    /* sleep mode : go to doze mode after 5 sec */
#define DEVICE_CONTROL_NOSLEEP      0x04
#define DEVICE_CONTROL_CONFIGURED   0x80

#define INTERRUPT_ENABLE_REG (ts->common_dsc.control_base+1) /* Interrupt Enable 0 */

#define DEVICE_STATUS_REG    (ts->common_dsc.data_base)    /* Device Status */
#define DEVICE_FAILURE_MASK         0x03
#define DEVICE_CRC_ERROR_MASK       0x04
#define DEVICE_STATUS_FLASH_PROG    0x40
#define DEVICE_STATUS_UNCONFIGURED  0x80

#define INTERRUPT_STATUS_REG  (ts->common_dsc.data_base+1) /* Interrupt Status */
#define BUTTON_DATA_REG       (ts->button_dsc.data_base)   /* Button Data */
#define MAX_NUM_OF_BUTTON 4

#define FINGER_STATE_REG      (ts->finger_dsc.data_base)   /* Finger State */
#define FINGER_DATA_REG_START (ts->finger_dsc.data_base+3) /* Finger Data Register */
#define FINGER_STATE_MASK           0x03
#define REG_X_POSITION              0
#define REG_Y_POSITION              1
#define REG_YX_POSITION             2
#define REG_WY_WX                   3
#define REG_Z                       4

#define TWO_D_REPORTING_MODE (ts->finger_dsc.control_base+0) /* 2D Reporting Mode */
#define REPORT_MODE_CONTINUOUS      0x00
#define REPORT_MODE_REDUCED         0x01
#define ABS_FILTER                  0x08
#define PALM_DETECT_REG      (ts->finger_dsc.control_base+1) /* Palm Detect */
#define DELTA_X_THRESH_REG  (ts->finger_dsc.control_base+2) /* Delta-X Thresh */
#define DELTA_Y_THRESH_REG   (ts->finger_dsc.control_base+3) /* Delta-Y Thresh */
#define SENSOR_MAX_X_POS     (ts->finger_dsc.control_base+6) /* SensorMaxXPos */
#define SENSOR_MAX_Y_POS     (ts->finger_dsc.control_base+8) /* SensorMaxYPos */
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
/*do nothing*/
#else
#define GESTURE_ENABLE_1_REG (ts->finger_dsc.control_base+10) /* Gesture Enables 1 */
#define GESTURE_ENABLE_2_REG (ts->finger_dsc.control_base+11) /* Gesture Enables 2 */
#endif

#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
#define PAGE_SELECT_REG             0xFF           /* Button exists Page 02 */
#define ANALOG_CONTROL_REG          (ts->analog_dsc.control_base)
#define ANALOG_COMMAND_REG          (ts->analog_dsc.command_base)
#define FAST_RELAXATION_RATE        (ts->analog_dsc.control_base+16)
#define FORCE_FAST_RELAXATION       0x04
#define FORCE_UPDATE                0x04
#else
#define MELT_CONTROL_REG            0xF0
#define MELT_CONTROL_NO_MELT        0x00
#define MELT_CONTROL_MELT           0x01
#define MELT_CONTROL_NUKE_MELT      0x80
#endif

#define DEVICE_COMMAND_REG          (ts->common_dsc.command_base)
#define FINGER_COMMAND_REG          (ts->finger_dsc.command_base)
#define BUTTON_COMMAND_REG          (ts->button_dsc.command_base)

#define FLASH_CONTROL_REG           (ts->flash_dsc.data_base+18)     /* Flash Control */
#define FLASH_STATUS_MASK           0xF0
#define FW_OFFSET_PRODUCT_ID        0x40
#define FW_OFFSET_IMAGE_VERSION     0xB100

/* Get user-finger-data from register.
 */
#define TS_SNTS_GET_X_POSITION(_high_reg, _low_reg) \
	(((u16)(((_high_reg) << 4) & 0x0FF0) | (u16)((_low_reg) & 0x0F)))
#define TS_SNTS_GET_Y_POSITION(_high_reg, _low_reg) \
	(((u16)(((_high_reg) << 4) & 0x0FF0) | (u16)(((_low_reg) >> 4) & 0x0F)))
#define TS_SNTS_GET_WIDTH_MAJOR(_width) \
	((((((_width) & 0xF0) >> 4) - ((_width) & 0x0F)) > 0) ? \
		((_width) & 0xF0) >> 4 : (_width) & 0x0F)
#define TS_SNTS_GET_WIDTH_MINOR(_width) \
	((((((_width) & 0xF0) >> 4) - ((_width) & 0x0F)) > 0) ? \
		(_width) & 0x0F : ((_width) & 0xF0) >> 4)
#define TS_SNTS_GET_ORIENTATION(_width) \
	((((((_width) & 0xF0) >> 4) - ((_width) & 0x0F)) > 0) ? 0 : 1)
#define TS_SNTS_GET_PRESSURE(_pressure) (_pressure)

#define FINGER_STATE_NO_PRESENT         0
#define FINGER_STATE_PRESENT_VALID      1
#define FINGER_STATE_PRESENT_NOVALID    2
#define FINGER_STATE_REVSERVED          3

int synaptics_ts_get_data(struct i2c_client *client, struct t_data* data,
					struct b_data* button, u8* total_num)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);

	u32 finger_status=0;
	u8 finger_index=0;
	u8 id=0;
	u8 cnt;

	if (unlikely(touch_debug_mask & DEBUG_TRACE))
		TOUCH_DEBUG_MSG("\n");

	if (unlikely(touch_i2c_read(client, DEVICE_STATUS_REG,
			sizeof(ts->ts_data.device_status_reg),
			&ts->ts_data.device_status_reg) < 0)) {
		TOUCH_ERR_MSG("DEVICE_STATUS_REG read fail\n");
		goto err_synaptics_getdata;
	}

	/* ESD damage check */
	if ((ts->ts_data.device_status_reg & DEVICE_FAILURE_MASK) ==
							DEVICE_FAILURE_MASK) {
		TOUCH_ERR_MSG("ESD damage occured. Reset Touch IC\n");
		goto err_synaptics_device_damage;
	}

	/* Internal reset check */
	if (((ts->ts_data.device_status_reg & DEVICE_STATUS_UNCONFIGURED) >> 7) == 1) {
		TOUCH_ERR_MSG("Touch IC resetted internally. "
				"Reconfigure register setting\n");
		goto err_synaptics_device_damage;
	}

	if (unlikely(touch_i2c_read(client, INTERRUPT_STATUS_REG,
			sizeof(ts->ts_data.interrupt_status_reg),
			&ts->ts_data.interrupt_status_reg) < 0)) {
		TOUCH_ERR_MSG("INTERRUPT_STATUS_REG read fail\n");
		goto err_synaptics_getdata;
	}

	if (unlikely(touch_debug_mask & DEBUG_GET_DATA))
		TOUCH_INFO_MSG("Interrupt_status : 0x%x\n",
					ts->ts_data.interrupt_status_reg);

	/* IC bug Exception handling - Interrupt status reg is 0 when interrupt occur */
	if (ts->ts_data.interrupt_status_reg == 0) {
		TOUCH_ERR_MSG("Interrupt_status reg is 0. "
				"Something is wrong in IC\n");
		goto err_synaptics_device_damage;
	}

	/* Because of ESD damage... */
	if (unlikely(ts->ts_data.interrupt_status_reg & ts->interrupt_mask.flash)) {
		TOUCH_ERR_MSG("Impossible Interrupt\n");
		goto err_synaptics_device_damage;
	}

	/* Finger */
	if (likely(ts->ts_data.interrupt_status_reg & ts->interrupt_mask.abs)) {
		if (unlikely(touch_i2c_read(client, FINGER_STATE_REG,
				sizeof(ts->ts_data.finger.finger_status_reg),
				ts->ts_data.finger.finger_status_reg) < 0)) {
			TOUCH_ERR_MSG("FINGER_STATE_REG read fail\n");
			goto err_synaptics_getdata;
		}

		finger_status = ts->ts_data.finger.finger_status_reg[0] |
			ts->ts_data.finger.finger_status_reg[1] << 8 |
			(ts->ts_data.finger.finger_status_reg[2] & 0xF) << 16;

		if (unlikely(touch_debug_mask & DEBUG_GET_DATA)) {
			TOUCH_INFO_MSG("Finger_status : 0x%x, 0x%x, 0x%x\n",
				ts->ts_data.finger.finger_status_reg[0],
				ts->ts_data.finger.finger_status_reg[1],
				ts->ts_data.finger.finger_status_reg[2]);
			TOUCH_INFO_MSG("Touch_bit_mask: 0x%x\n", finger_status);
		}

		for (id = 0; id < ts->pdata->caps->max_id; id++) {
			switch (((finger_status >> (id*2)) & 0x3)) {
			case FINGER_STATE_PRESENT_VALID:
				touch_i2c_read(ts->client,
					FINGER_DATA_REG_START + NUM_OF_EACH_FINGER_DATA_REG * id,
					NUM_OF_EACH_FINGER_DATA_REG,
					ts->ts_data.finger.finger_reg[id]);
				data[id].state = ABS_PRESS;
				data[id].x_position = TS_SNTS_GET_X_POSITION(
					ts->ts_data.finger.finger_reg[id][REG_X_POSITION],
					ts->ts_data.finger.finger_reg[id][REG_YX_POSITION]);
				data[id].y_position = TS_SNTS_GET_Y_POSITION(ts->ts_data.finger.finger_reg[id][REG_Y_POSITION], ts->ts_data.finger.finger_reg[id][REG_YX_POSITION]);
				data[id].width_major = TS_SNTS_GET_WIDTH_MAJOR(ts->ts_data.finger.finger_reg[id][REG_WY_WX]);
				data[id].width_minor = TS_SNTS_GET_WIDTH_MINOR(ts->ts_data.finger.finger_reg[id][REG_WY_WX]);
				data[id].tool_type = (data[id].width_major == 0 && data[id].width_minor == 0) ? MT_TOOL_PEN : MT_TOOL_FINGER;
				data[id].width_orientation = TS_SNTS_GET_ORIENTATION(ts->ts_data.finger.finger_reg[id][REG_WY_WX]);
				data[id].pressure = TS_SNTS_GET_PRESSURE(ts->ts_data.finger.finger_reg[id][REG_Z]);

				if (unlikely(touch_debug_mask & DEBUG_GET_DATA))
					TOUCH_INFO_MSG("[%d] pos(%4d,%4d) w_m[%2d] w_n[%2d] w_o[%2d] p[%2d]\n",
						finger_index,
						data[id].x_position,
						data[id].y_position,
						data[id].width_major,
						data[id].width_minor,
						data[id].width_orientation,
						data[id].pressure);
				(*total_num)++;
				break;

			case FINGER_STATE_NO_PRESENT:
				if (data[id].state == ABS_PRESS)
					data[id].state = ABS_RELEASE;
				break;

			default:
				/* Do nothing including inacurate data */
				break;
			}

		}
		if (unlikely(touch_debug_mask & DEBUG_GET_DATA))
			TOUCH_INFO_MSG("Total_num: %d\n", *total_num);
	}

	 /* Button */
	if ((ts->button_dsc.id != 0) && (ts->ts_data.interrupt_status_reg &
						ts->interrupt_mask.button)) {

		if (unlikely(touch_i2c_write_byte(client,
					PAGE_SELECT_REG, 0x02) < 0)) {
			TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
			return -EIO;
		}

		if (unlikely(touch_i2c_read(client, BUTTON_DATA_REG,
				sizeof(ts->ts_data.button_data_reg),
				&ts->ts_data.button_data_reg) < 0)) {
			TOUCH_ERR_MSG("BUTTON_DATA_REG read fail\n");
			goto err_synaptics_getdata;
		}

		if (unlikely(touch_i2c_write_byte(client,
				PAGE_SELECT_REG, 0x00) < 0)) {
			TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
			return -EIO;
		}

		if (unlikely(touch_debug_mask & DEBUG_BUTTON))
			TOUCH_DEBUG_MSG("Button register: 0x%x\n",
					ts->ts_data.button_data_reg);

		if (ts->ts_data.button_data_reg) {
			/* pressed - find first one */
			for (cnt = 0; cnt < ts->pdata->caps->number_of_button; cnt++) {
				if ((ts->ts_data.button_data_reg >> cnt) & 1)
				{
					ts->ts_data.button.key_code =
						ts->pdata->caps->button_name[cnt];
					button->key_code =
						ts->ts_data.button.key_code;
					button->state = 1;
					break;
				}
			}
		} else {
			/* release */
			button->key_code = ts->ts_data.button.key_code;
			button->state = 0;
		}
	}

	return 0;

err_synaptics_device_damage:
err_synaptics_getdata:
	return -EIO;
}

static int read_page_description_table(struct i2c_client* client)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);
	struct ts_function_descriptor buffer;
	unsigned short u_address;

	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	memset(&buffer, 0x0, sizeof(struct ts_function_descriptor));

	ts->common_dsc.id = 0;
	ts->finger_dsc.id = 0;
	ts->button_dsc.id = 0;
	ts->flash_dsc.id  = 0;
	ts->analog_dsc.id = 0;

	for (u_address = DESCRIPTION_TABLE_START; u_address > 10;
			u_address -= sizeof(struct ts_function_descriptor)) {
		if (unlikely(touch_i2c_read(client, u_address, sizeof(buffer),
					(unsigned char *)&buffer) < 0)) {
			TOUCH_ERR_MSG("RMI4 Function Descriptor read fail\n");
			return -EIO;
		}

		if (buffer.id == 0)
			break;

		switch (buffer.id) {
		case RMI_DEVICE_CONTROL:
			ts->common_dsc = buffer;
			break;
		case TOUCHPAD_SENSORS:
			ts->finger_dsc = buffer;
			break;
		case FLASH_MEMORY_MANAGEMENT:
			ts->flash_dsc = buffer;
			break;
		}
	}

#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
	if (unlikely(touch_i2c_write_byte(client, PAGE_SELECT_REG, 0x01) < 0)) {
		TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(client, ANALOG_TABLE_START, sizeof(buffer), (unsigned char *)&buffer) < 0)) {
		TOUCH_ERR_MSG("RMI4 Function Descriptor read fail\n");
		return -EIO;
	}

	if (buffer.id == ANALOG_CONTROL) {
		ts->analog_dsc = buffer;
	}

	if (unlikely(touch_i2c_write_byte(client, PAGE_SELECT_REG, 0x02) < 0)) {
		TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(ts->client, BUTTON_TABLE_START, sizeof(buffer), (unsigned char *)&buffer))) {
		TOUCH_ERR_MSG("Button ts_function_descriptor read fail\n");
		return -EIO;
	}

	if (buffer.id == CAPACITIVE_BUTTON_SENSORS)
		ts->button_dsc = buffer;

	if (unlikely(touch_i2c_write_byte(client, PAGE_SELECT_REG, 0x00) < 0)) {
		TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
		return -EIO;
	}
#endif

	/* set interrupt mask */
	ts->interrupt_mask.flash = 0x1;
	ts->interrupt_mask.status = 0x2;

	if (ts->button_dsc.id == 0) {
		ts->interrupt_mask.abs = 0x4;
	} else {
		if (ts->finger_dsc.data_base > ts->button_dsc.data_base) {
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
			ts->interrupt_mask.abs = 0x4;
			ts->interrupt_mask.button = 0x20;
#else
			ts->interrupt_mask.abs = 0x8;
			ts->interrupt_mask.button = 0x4;
#endif
		} else {
			ts->interrupt_mask.abs = 0x4;
			ts->interrupt_mask.button = 0x8;
		}
	}

	if (ts->common_dsc.id == 0 || ts->finger_dsc.id == 0 ||
						ts->flash_dsc.id == 0) {
		TOUCH_ERR_MSG("common_dsc/finger_dsc/flash_dsc are not initiailized\n");
		return -EPERM;
	}

	if (touch_debug_mask & DEBUG_BASE_INFO)
		TOUCH_INFO_MSG("common[%d] finger[%d] flash[%d] button[%d]\n",
				ts->common_dsc.id, ts->finger_dsc.id,
				ts->flash_dsc.id, ts->button_dsc.id);

	return 0;
}

int get_ic_info(struct synaptics_ts_data* ts, struct touch_fw_info* fw_info)
{
#if defined(ARRAYED_TOUCH_FW_BIN)
	int cnt;
#endif
	u8 device_status = 0;
	u8 flash_control = 0;

	read_page_description_table(ts->client);

	memset(fw_info, 0, sizeof(fw_info));

	if (unlikely(touch_i2c_read(ts->client, FW_REVISION_REG,
			sizeof(fw_info->fw_rev), &fw_info->fw_rev) < 0)) {
		TOUCH_ERR_MSG("FW_REVISION_REG read fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(ts->client, MANUFACTURER_ID_REG,
					sizeof(fw_info->manufacturer_id),
					&fw_info->manufacturer_id) < 0)) {
		TOUCH_ERR_MSG("MANUFACTURER_ID_REG read fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(ts->client, PRODUCT_ID_REG,
					sizeof(fw_info->product_id) - 1,
					fw_info->product_id) < 0)) {
		TOUCH_ERR_MSG("PRODUCT_ID_REG read fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(ts->client, FW_VERSION,
					sizeof(fw_info->fw_version) - 1,
					fw_info->fw_version) < 0)) {
		TOUCH_ERR_MSG("FW_VERSION read fail\n");
		return -EIO;
	}

	ts->ic_panel_type = IC7020_G2_H_PTN;
	TOUCH_INFO_MSG("IC is 7020, H pattern, panel is G2.");

#if defined(ARRAYED_TOUCH_FW_BIN)
	for (cnt = 0; cnt < sizeof(SynaFirmware)/sizeof(SynaFirmware[0]); cnt++) {
		strncpy(fw_info->fw_image_product_id,
				&SynaFirmware[cnt][FW_OFFSET_PRODUCT_ID], 10);
		if (!(strncmp(fw_info->product_id,
				fw_info->fw_image_product_id, 10)))
			break;
	}
	fw_info->fw_start = (unsigned char *)&SynaFirmware[cnt][0];
	fw_info->fw_size = sizeof(SynaFirmware[0]);
#else
	fw_info->fw_start = (unsigned char *)&SynaFirmware[0];
	fw_info->fw_size = sizeof(SynaFirmware);
#endif

	strncpy(fw_info->fw_image_product_id,
				&fw_info->fw_start[FW_OFFSET_PRODUCT_ID], 10);
	strncpy(fw_info->fw_image_version,
					&fw_info->fw_start[FW_OFFSET_IMAGE_VERSION],4);

	if (unlikely(touch_i2c_read(ts->client, FLASH_CONTROL_REG,
				sizeof(flash_control), &flash_control) < 0)) {
		TOUCH_ERR_MSG("FLASH_CONTROL_REG read fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(ts->client, DEVICE_STATUS_REG,
				sizeof(device_status), &device_status) < 0)) {
		TOUCH_ERR_MSG("DEVICE_STATUS_REG read fail\n");
		return -EIO;
	}

	/* Firmware has a problem, so we should firmware-upgrade */
	if (device_status & DEVICE_STATUS_FLASH_PROG
			|| (device_status & DEVICE_CRC_ERROR_MASK) != 0
			|| (flash_control & FLASH_STATUS_MASK) != 0) {
		TOUCH_ERR_MSG("Firmware has a unknown-problem, "
				"so it needs firmware-upgrade.\n");
		TOUCH_ERR_MSG("FLASH_CONTROL[%x] DEVICE_STATUS_REG[%x]\n",
				(u32)flash_control, (u32)device_status);

		fw_info->fw_rev = 0;
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
		fw_info->fw_force_rework = true;
#endif
	}

	ts->fw_info = fw_info;

	return 0;
}

int synaptics_ts_init(struct i2c_client* client, struct touch_fw_info* fw_info)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);
	struct lge_touch_data *lg_ts =
			(struct lge_touch_data *) i2c_get_clientdata(client);
	u8 buf;

	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	if (!ts->is_probed)
		if (unlikely(get_ic_info(ts, fw_info) < 0))
			return -EIO;

	if (unlikely(touch_i2c_write_byte(client, DEVICE_CONTROL_REG,
		DEVICE_CONTROL_NOSLEEP | DEVICE_CONTROL_CONFIGURED) < 0)) {
		TOUCH_ERR_MSG("DEVICE_CONTROL_REG write fail\n");
		return -EIO;
	}

	if (unlikely(touch_i2c_read(client, INTERRUPT_ENABLE_REG,
		1, &buf) < 0)) {
		TOUCH_ERR_MSG("INTERRUPT_ENABLE_REG read fail\n");
		return -EIO;
	}

	if (!lg_ts->pdata->caps->button_support) {
		buf &= ~ts->interrupt_mask.button;
		ts->interrupt_mask.button = 0;
	}

	if (unlikely(touch_i2c_write_byte(client, INTERRUPT_ENABLE_REG,
		buf | ts->interrupt_mask.abs | ts->interrupt_mask.button) < 0)) {
		TOUCH_ERR_MSG("INTERRUPT_ENABLE_REG write fail\n");
		return -EIO;
	}

#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
	if (ts->pdata->role->report_mode == CONTINUOUS_REPORT_MODE) {
		if (unlikely(touch_i2c_write_byte(client, TWO_D_REPORTING_MODE,
				REPORT_MODE_CONTINUOUS) < 0)) {
			TOUCH_ERR_MSG("TWO_D_REPORTING_MODE write fail\n");
			return -EIO;
		}
	} else {	/* REDUCED_REPORT_MODE */
		if (unlikely(touch_i2c_write_byte(client, TWO_D_REPORTING_MODE,
				REPORT_MODE_REDUCED) < 0)) {
			TOUCH_ERR_MSG("TWO_D_REPORTING_MODE write fail\n");
			return -EIO;
		}

		if (unlikely(touch_i2c_write_byte(client, DELTA_X_THRESH_REG,
				ts->pdata->role->delta_pos_threshold) < 0)) {
			TOUCH_ERR_MSG("DELTA_X_THRESH_REG write fail\n");
			return -EIO;
		}
		if (unlikely(touch_i2c_write_byte(client, DELTA_Y_THRESH_REG,
				ts->pdata->role->delta_pos_threshold) < 0)) {
			TOUCH_ERR_MSG("DELTA_Y_THRESH_REG write fail\n");
			return -EIO;
		}
	}
#else
	if (unlikely(touch_i2c_write_byte(client,
					GESTURE_ENABLE_1_REG, 0x00) < 0)) {
		TOUCH_ERR_MSG("GESTURE_ENABLE_1_REG write fail\n");
		return -EIO;
	}
	if (unlikely(touch_i2c_write_byte(client, GESTURE_ENABLE_2_REG, 0x00) < 0)) {
		TOUCH_ERR_MSG("GESTURE_ENABLE_2_REG write fail\n");
		return -EIO;
	}

	if (ts->pdata->role->report_mode == CONTINUOUS_REPORT_MODE) {
		if (unlikely(touch_i2c_write_byte(client, TWO_D_REPORTING_MODE,
				REPORT_MODE_CONTINUOUS) < 0)) {
			TOUCH_ERR_MSG("TWO_D_REPORTING_MODE write fail\n");
			return -EIO;
		}
	} else {	/* REDUCED_REPORT_MODE */
		if (unlikely(touch_i2c_write_byte(client, TWO_D_REPORTING_MODE,
				REPORT_MODE_REDUCED) < 0)) {
			TOUCH_ERR_MSG("TWO_D_REPORTING_MODE write fail\n");
			return -EIO;
		}

		if (unlikely(touch_i2c_write_byte(client, DELTA_X_THRESH_REG,
				ts->pdata->role->delta_pos_threshold) < 0)) {
			TOUCH_ERR_MSG("DELTA_X_THRESH_REG write fail\n");
			return -EIO;
		}
		if (unlikely(touch_i2c_write_byte(client, DELTA_Y_THRESH_REG,
				ts->pdata->role->delta_pos_threshold) < 0)) {
			TOUCH_ERR_MSG("DELTA_Y_THRESH_REG write fail\n");
			return -EIO;
		}
	}
#endif

	if (unlikely(touch_i2c_read(client, INTERRUPT_STATUS_REG, 1, &buf) < 0)) {
		TOUCH_ERR_MSG("INTERRUPT_STATUS_REG read fail\n");
		return -EIO;	/* it is critical problem because interrupt will not occur. */
	}

	if (unlikely(touch_i2c_read(client, FINGER_STATE_REG,
				sizeof(ts->ts_data.finger.finger_status_reg),
				ts->ts_data.finger.finger_status_reg) < 0)) {
		TOUCH_ERR_MSG("FINGER_STATE_REG read fail\n");
		/* it is critical problem because interrupt will not occur on some FW. */
		return -EIO;
	}

	ts->is_probed = 1;

	return 0;
}

int synaptics_ts_power(struct i2c_client* client, int power_ctrl)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);

	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	switch (power_ctrl) {
	case POWER_OFF:
		if (ts->pdata->reset_pin > 0)
			gpio_set_value(ts->pdata->reset_pin, 0);

		if (ts->pdata->pwr->use_regulator) {
			regulator_disable(ts->regulator_vio);
			regulator_disable(ts->regulator_vdd);
		}
		else
			ts->pdata->pwr->power(0);
		break;
	case POWER_ON:
		if (ts->pdata->pwr->use_regulator) {
			regulator_enable(ts->regulator_vdd);
			regulator_enable(ts->regulator_vio);
		}
		else
			ts->pdata->pwr->power(1);

		if (ts->pdata->reset_pin > 0)
			gpio_set_value(ts->pdata->reset_pin, 1);
		break;
	case POWER_SLEEP:
		if (unlikely(touch_i2c_write_byte(client, DEVICE_CONTROL_REG,
					DEVICE_CONTROL_SLEEP |
					DEVICE_CONTROL_CONFIGURED) < 0)) {
			TOUCH_ERR_MSG("DEVICE_CONTROL_REG write fail\n");
			return -EIO;
		}
		break;
	case POWER_WAKE:
		if (unlikely(touch_i2c_write_byte(client, DEVICE_CONTROL_REG,
					DEVICE_CONTROL_SPECIFIC |
					DEVICE_CONTROL_CONFIGURED) < 0)) {
			TOUCH_ERR_MSG("DEVICE_CONTROL_REG write fail\n");
			return -EIO;
		}
		break;
	default:
		return -EIO;
		break;
	}

	return 0;
}

int synaptics_ts_probe(struct i2c_client* client)
{
	struct synaptics_ts_data* ts;
	int ret = 0;

	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	ts = kzalloc(sizeof(struct synaptics_ts_data), GFP_KERNEL);
	if (!ts) {
		TOUCH_ERR_MSG("Can not allocate memory\n");
		ret = -ENOMEM;
		goto err_alloc_data_failed;
	}

	set_touch_handle(client, ts);

	ts->client = client;
	ts->pdata = client->dev.platform_data;
#if defined(CONFIG_TOUCH_REG_MAP_TM2000)
	ts->ic_panel_type = IC7020_G2_H_PTN;
#elif defined(CONFIG_TOUCH_REG_MAP_TM2372)
	ts->ic_panel_type = IC7020_GFF_H_PTN;
#endif

	if (ts->pdata->pwr->use_regulator) {
		ts->regulator_vdd =
			regulator_get_exclusive(NULL, ts->pdata->pwr->vdd);
		if (IS_ERR(ts->regulator_vdd)) {
			TOUCH_ERR_MSG("FAIL: regulator_get_vdd - %s\n",
							ts->pdata->pwr->vdd);
			ret = -EPERM;
			goto err_get_vdd_failed;
		}

		ts->regulator_vio = regulator_get_exclusive(NULL,
							ts->pdata->pwr->vio);
		if (IS_ERR(ts->regulator_vio)) {
			TOUCH_ERR_MSG("FAIL: regulator_get_vio - %s\n",
							ts->pdata->pwr->vio);
			ret = -EPERM;
			goto err_get_vio_failed;
		}

		if (ts->pdata->pwr->vdd_voltage > 0) {
			ret = regulator_set_voltage(ts->regulator_vdd,
						ts->pdata->pwr->vdd_voltage,
						ts->pdata->pwr->vdd_voltage);
			if (ret < 0) {
				TOUCH_ERR_MSG("FAIL: VDD voltage setting"
						" - (%duV)\n",
						ts->pdata->pwr->vdd_voltage);
				ret = -EPERM;
				goto err_set_voltage;
			}
		}

		if (ts->pdata->pwr->vio_voltage > 0) {
			ret = regulator_set_voltage(ts->regulator_vio,
						ts->pdata->pwr->vio_voltage,
						ts->pdata->pwr->vio_voltage);
			if (ret < 0) {
				TOUCH_ERR_MSG("FAIL: VIO voltage setting"
						" - (%duV)\n",
						ts->pdata->pwr->vio_voltage);
				ret = -EPERM;
				goto err_set_voltage;
			}
		}
	}

	return ret;

err_set_voltage:
	if (ts->pdata->pwr->use_regulator) {
		regulator_put(ts->regulator_vio);
	}
err_get_vio_failed:
	if (ts->pdata->pwr->use_regulator) {
		regulator_put(ts->regulator_vdd);
	}
err_get_vdd_failed:
	kfree(ts);
err_alloc_data_failed:
	return ret;
}

void synaptics_ts_remove(struct i2c_client* client)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);

	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	if (ts->pdata->pwr->use_regulator) {
		regulator_put(ts->regulator_vio);
		regulator_put(ts->regulator_vdd);
	}

	kfree(ts);
}

int synaptics_ts_fw_upgrade(struct i2c_client* client, const char* fw_path)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);
	int ret = 0;

	ts->is_probed = 0;

	ret = FirmwareUpgrade(ts, fw_path);

	/* update IC info */
	get_ic_info(ts, ts->fw_info);

	return ret;
}

int synaptics_ts_ic_ctrl(struct i2c_client *client, u8 code, u16 value)
{
	struct synaptics_ts_data* ts =
			(struct synaptics_ts_data*)get_touch_handle(client);
	u8 buf = 0;

	switch (code) {
	case IC_CTRL_BASELINE:
		switch (value) {
		case BASELINE_OPEN:
			if (!ts->analog_dsc.id) /* If not supported, ignore */
				break;

#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
			if (unlikely(touch_i2c_write_byte(client,
						PAGE_SELECT_REG, 0x01) < 0)) {
				TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
				return -EIO;
			}

			if (unlikely(touch_i2c_write_byte(client,
						ANALOG_CONTROL_REG,
						FORCE_FAST_RELAXATION) < 0)) {
				TOUCH_ERR_MSG("ANALOG_CONTROL_REG write fail\n");
				return -EIO;
			}

			msleep(10);

			if (unlikely(touch_i2c_write_byte(client,
						ANALOG_COMMAND_REG,
						FORCE_UPDATE) < 0)) {
				TOUCH_ERR_MSG("force fast relaxation command write fail\n");
				return -EIO;
			}

			if (unlikely(touch_i2c_write_byte(client,
						PAGE_SELECT_REG, 0x00) < 0)) {
				TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
				return -EIO;
			}

			if (unlikely(touch_debug_mask & DEBUG_GHOST))
				TOUCH_INFO_MSG("BASELINE_OPEN  ~~~~~~~~\n");
#else
			if (unlikely(touch_i2c_write_byte(client,
						MELT_CONTROL_REG,
						MELT_CONTROL_MELT) < 0)) {
				TOUCH_ERR_MSG("MELT_CONTROL_REG write fail\n");
				return -EIO;
			}
#endif
			break;
		case BASELINE_FIX:
			if (!ts->analog_dsc.id) /* If not supported, ignore */
				break;

#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
			if (unlikely(touch_i2c_write_byte(client,
						PAGE_SELECT_REG, 0x01) < 0)) {
				TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
				return -EIO;
			}

			if (unlikely(touch_i2c_write_byte(client,
						ANALOG_CONTROL_REG, 0x0) < 0)) {
				TOUCH_ERR_MSG("ANALOG_CONTROL_REG write fail\n");
				return -EIO;
			}

			msleep(10);

			if (unlikely(touch_i2c_write_byte(client,
						ANALOG_COMMAND_REG,
						FORCE_UPDATE) < 0)) {
				TOUCH_ERR_MSG("force fast relaxation command write fail\n");
				return -EIO;
			}

			if (unlikely(touch_i2c_write_byte(client,
						PAGE_SELECT_REG, 0x00) < 0)) {
				TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
				return -EIO;
			}

			if (unlikely(touch_debug_mask & DEBUG_GHOST))
				TOUCH_INFO_MSG("BASELINE_FIX  ~~~~~~~~\n");
#else
			if (unlikely(touch_i2c_write_byte(client,
						MELT_CONTROL_REG,
						MELT_CONTROL_NO_MELT) < 0)) {
				TOUCH_ERR_MSG("MELT_CONTROL_REG write fail\n");
				return -EIO;
			}
#endif
			break;
		case BASELINE_REBASE:
			/* rebase base line */
			if (likely(ts->finger_dsc.id != 0)) {
				if (unlikely(touch_i2c_write_byte(client,
						FINGER_COMMAND_REG, 0x1) < 0)) {
					TOUCH_ERR_MSG("finger baseline reset "
							"command write fail\n");
					return -EIO;
				}
			}

#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
/* do nothing */
#else
			if (unlikely(ts->button_dsc.id != 0)) {
				if (unlikely(touch_i2c_write_byte(client,
						BUTTON_COMMAND_REG, 0x1) < 0)) {
					TOUCH_ERR_MSG("finger baseline reset "
							"command write fail\n");
					return -EIO;
				}
			}
#endif
			break;
		default:
			break;
		}
		break;
	case IC_CTRL_READ:
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
		if (unlikely(touch_i2c_write_byte(client,
			PAGE_SELECT_REG, ((value & 0xFF00) >> 8)) < 0)) {
			TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
			return -EIO;
		}

		if (touch_i2c_read(client, (value & 0xFF), 1, &buf) < 0) {
			TOUCH_ERR_MSG("IC register read fail\n");
			return -EIO;
		}

		if (unlikely(touch_i2c_write_byte(client,
						PAGE_SELECT_REG, 0x00) < 0)) {
			TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
			return -EIO;
		}
#else
		if (touch_i2c_read(client, value, 1, &buf) < 0) {
			TOUCH_ERR_MSG("IC register read fail\n");
			return -EIO;
		}
#endif
		break;
	case IC_CTRL_WRITE:
#if defined(CONFIG_TOUCH_REG_MAP_TM2000) || defined(CONFIG_TOUCH_REG_MAP_TM2372)
		if (unlikely(touch_i2c_write_byte(client,
			PAGE_SELECT_REG, ((value & 0xFF0000) >> 16)) < 0)) {
			TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
			return -EIO;
		}

		if (touch_i2c_write_byte(client,
				((value & 0xFF00) >> 8), (value & 0xFF)) < 0) {
			TOUCH_ERR_MSG("IC register write fail\n");
			return -EIO;
		}

		if (unlikely(touch_i2c_write_byte(client,
						PAGE_SELECT_REG, 0x00) < 0)) {
			TOUCH_ERR_MSG("PAGE_SELECT_REG write fail\n");
			return -EIO;
		}
#else
		if (touch_i2c_write_byte(client,
				((value & 0xFF00) >> 8), (value & 0xFF)) < 0) {
			TOUCH_ERR_MSG("IC register write fail\n");
			return -EIO;
		}
#endif
		break;
	case IC_CTRL_RESET_CMD:
		if (unlikely(touch_i2c_write_byte(client,
						DEVICE_COMMAND_REG, 0x1) < 0)) {
			TOUCH_ERR_MSG("IC Reset command write fail\n");
			return -EIO;
		}
		break;
	default:
		break;
	}

	return buf;
}

int synaptics_ts_fw_upgrade_check(struct lge_touch_data *ts)
{
	if (ts->fw_info.fw_force_rework || ts->fw_upgrade.fw_force_upgrade) {
		TOUCH_INFO_MSG("FW-upgrade Force Rework.\n");
	} else {
		if (((int)simple_strtoul(&ts->fw_info.fw_version[1], NULL, 10) >= (int)simple_strtoul(&ts->fw_info.fw_image_version[1], NULL, 10))) {
			TOUCH_INFO_MSG("DO NOT UPDATE 7020 G2 H " "pattern FW-upgrade is not executed\n");
			return -1;
		} else {
			TOUCH_INFO_MSG("7020 G2 H pattern FW-upgrade " "is executed\n");
		}
	}

	return 0;
}

struct touch_device_driver synaptics_ts_driver = {
	.probe            = synaptics_ts_probe,
	.remove           = synaptics_ts_remove,
	.init             = synaptics_ts_init,
	.data             = synaptics_ts_get_data,
	.power            = synaptics_ts_power,
	.fw_upgrade       = synaptics_ts_fw_upgrade,
	.ic_ctrl          = synaptics_ts_ic_ctrl,
	.fw_upgrade_check = synaptics_ts_fw_upgrade_check,
};

static int __devinit touch_init(void)
{
	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	return touch_driver_register(&synaptics_ts_driver);
}

static void __exit touch_exit(void)
{
	if (touch_debug_mask & DEBUG_TRACE)
		TOUCH_DEBUG_MSG("\n");

	touch_driver_unregister();
}

module_init(touch_init);
module_exit(touch_exit);

MODULE_AUTHOR("yehan.ahn@lge.com, hyesung.shin@lge.com");
MODULE_DESCRIPTION("LGE Touch Driver");
MODULE_LICENSE("GPL");