Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (64 commits)
  Input: tsc2005 - remove 'disable' sysfs attribute
  Input: tsc2005 - add open/close
  Input: tsc2005 - handle read errors from SPI layer
  Input: tsc2005 - do not rearm timer in hardirq handler
  Input: tsc2005 - don't use work for 'pen up' handling
  Input: tsc2005 - do not use 0 in place of NULL
  Input: tsc2005 - use true/false for boolean variables
  Input: tsc2005 - hide selftest attribute if we can't reset
  Input: tsc2005 - rework driver initialization code
  Input: tsc2005 - set up bus type in input device
  Input: tsc2005 - set up parent device
  Input: tsc2005 - clear driver data after unbinding
  Input: tsc2005 - add module description
  Input: tsc2005 - remove driver banner message
  Input: tsc2005 - remove incorrect module alias
  Input: tsc2005 - convert to using dev_pm_ops
  Input: tsc2005 - use spi_get/set_drvdata()
  Input: introduce tsc2005 driver
  Input: xen-kbdfront - move to drivers/input/misc
  Input: xen-kbdfront - add grant reference for shared page
  ...

1 files changed, 1211 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
new file mode 100644
index 000000000000..4012436633b1
--- /dev/null
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -0,0 +1,1211 @@
+/*
+ * Atmel maXTouch Touchscreen driver
+ *
+ * Copyright (C) 2010 Samsung Electronics Co.Ltd
+ * Author: Joonyoung Shim <jy0922.shim@samsung.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/i2c/atmel_mxt_ts.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+
+/* Version */
+#define MXT_VER_20              20
+#define MXT_VER_21              21
+#define MXT_VER_22              22
+
+/* Slave addresses */
+#define MXT_APP_LOW             0x4a
+#define MXT_APP_HIGH            0x4b
+#define MXT_BOOT_LOW            0x24
+#define MXT_BOOT_HIGH           0x25
+
+/* Firmware */
+#define MXT_FW_NAME             "maxtouch.fw"
+
+/* Registers */
+#define MXT_FAMILY_ID           0x00
+#define MXT_VARIANT_ID          0x01
+#define MXT_VERSION             0x02
+#define MXT_BUILD               0x03
+#define MXT_MATRIX_X_SIZE       0x04
+#define MXT_MATRIX_Y_SIZE       0x05
+#define MXT_OBJECT_NUM          0x06
+#define MXT_OBJECT_START        0x07
+
+#define MXT_OBJECT_SIZE         6
+
+/* Object types */
+#define MXT_DEBUG_DIAGNOSTIC    37
+#define MXT_GEN_MESSAGE         5
+#define MXT_GEN_COMMAND         6
+#define MXT_GEN_POWER           7
+#define MXT_GEN_ACQUIRE         8
+#define MXT_TOUCH_MULTI         9
+#define MXT_TOUCH_KEYARRAY      15
+#define MXT_TOUCH_PROXIMITY     23
+#define MXT_PROCI_GRIPFACE      20
+#define MXT_PROCG_NOISE         22
+#define MXT_PROCI_ONETOUCH      24
+#define MXT_PROCI_TWOTOUCH      27
+#define MXT_PROCI_GRIP          40
+#define MXT_PROCI_PALM          41
+#define MXT_SPT_COMMSCONFIG     18
+#define MXT_SPT_GPIOPWM         19
+#define MXT_SPT_SELFTEST        25
+#define MXT_SPT_CTECONFIG       28
+#define MXT_SPT_USERDATA        38
+#define MXT_SPT_DIGITIZER       43
+#define MXT_SPT_MESSAGECOUNT    44
+
+/* MXT_GEN_COMMAND field */
+#define MXT_COMMAND_RESET       0
+#define MXT_COMMAND_BACKUPNV    1
+#define MXT_COMMAND_CALIBRATE   2
+#define MXT_COMMAND_REPORTALL   3
+#define MXT_COMMAND_DIAGNOSTIC  5
+
+/* MXT_GEN_POWER field */
+#define MXT_POWER_IDLEACQINT    0
+#define MXT_POWER_ACTVACQINT    1
+#define MXT_POWER_ACTV2IDLETO   2
+
+/* MXT_GEN_ACQUIRE field */
+#define MXT_ACQUIRE_CHRGTIME    0
+#define MXT_ACQUIRE_TCHDRIFT    2
+#define MXT_ACQUIRE_DRIFTST     3
+#define MXT_ACQUIRE_TCHAUTOCAL  4
+#define MXT_ACQUIRE_SYNC        5
+#define MXT_ACQUIRE_ATCHCALST   6
+#define MXT_ACQUIRE_ATCHCALSTHR 7
+
+/* MXT_TOUCH_MULTI field */
+#define MXT_TOUCH_CTRL          0
+#define MXT_TOUCH_XORIGIN       1
+#define MXT_TOUCH_YORIGIN       2
+#define MXT_TOUCH_XSIZE         3
+#define MXT_TOUCH_YSIZE         4
+#define MXT_TOUCH_BLEN          6
+#define MXT_TOUCH_TCHTHR        7
+#define MXT_TOUCH_TCHDI         8
+#define MXT_TOUCH_ORIENT        9
+#define MXT_TOUCH_MOVHYSTI      11
+#define MXT_TOUCH_MOVHYSTN      12
+#define MXT_TOUCH_NUMTOUCH      14
+#define MXT_TOUCH_MRGHYST       15
+#define MXT_TOUCH_MRGTHR        16
+#define MXT_TOUCH_AMPHYST       17
+#define MXT_TOUCH_XRANGE_LSB    18
+#define MXT_TOUCH_XRANGE_MSB    19
+#define MXT_TOUCH_YRANGE_LSB    20
+#define MXT_TOUCH_YRANGE_MSB    21
+#define MXT_TOUCH_XLOCLIP       22
+#define MXT_TOUCH_XHICLIP       23
+#define MXT_TOUCH_YLOCLIP       24
+#define MXT_TOUCH_YHICLIP       25
+#define MXT_TOUCH_XEDGECTRL     26
+#define MXT_TOUCH_XEDGEDIST     27
+#define MXT_TOUCH_YEDGECTRL     28
+#define MXT_TOUCH_YEDGEDIST     29
+#define MXT_TOUCH_JUMPLIMIT     30
+
+/* MXT_PROCI_GRIPFACE field */
+#define MXT_GRIPFACE_CTRL       0
+#define MXT_GRIPFACE_XLOGRIP    1
+#define MXT_GRIPFACE_XHIGRIP    2
+#define MXT_GRIPFACE_YLOGRIP    3
+#define MXT_GRIPFACE_YHIGRIP    4
+#define MXT_GRIPFACE_MAXTCHS    5
+#define MXT_GRIPFACE_SZTHR1     7
+#define MXT_GRIPFACE_SZTHR2     8
+#define MXT_GRIPFACE_SHPTHR1    9
+#define MXT_GRIPFACE_SHPTHR2    10
+#define MXT_GRIPFACE_SUPEXTTO   11
+
+/* MXT_PROCI_NOISE field */
+#define MXT_NOISE_CTRL          0
+#define MXT_NOISE_OUTFLEN       1
+#define MXT_NOISE_GCAFUL_LSB    3
+#define MXT_NOISE_GCAFUL_MSB    4
+#define MXT_NOISE_GCAFLL_LSB    5
+#define MXT_NOISE_GCAFLL_MSB    6
+#define MXT_NOISE_ACTVGCAFVALID 7
+#define MXT_NOISE_NOISETHR      8
+#define MXT_NOISE_FREQHOPSCALE  10
+#define MXT_NOISE_FREQ0         11
+#define MXT_NOISE_FREQ1         12
+#define MXT_NOISE_FREQ2         13
+#define MXT_NOISE_FREQ3         14
+#define MXT_NOISE_FREQ4         15
+#define MXT_NOISE_IDLEGCAFVALID 16
+
+/* MXT_SPT_COMMSCONFIG */
+#define MXT_COMMS_CTRL          0
+#define MXT_COMMS_CMD           1
+
+/* MXT_SPT_CTECONFIG field */
+#define MXT_CTE_CTRL            0
+#define MXT_CTE_CMD             1
+#define MXT_CTE_MODE            2
+#define MXT_CTE_IDLEGCAFDEPTH   3
+#define MXT_CTE_ACTVGCAFDEPTH   4
+#define MXT_CTE_VOLTAGE         5
+
+#define MXT_VOLTAGE_DEFAULT     2700000
+#define MXT_VOLTAGE_STEP        10000
+
+/* Define for MXT_GEN_COMMAND */
+#define MXT_BOOT_VALUE          0xa5
+#define MXT_BACKUP_VALUE        0x55
+#define MXT_BACKUP_TIME         25      /* msec */
+#define MXT_RESET_TIME          65      /* msec */
+
+#define MXT_FWRESET_TIME        175     /* msec */
+
+/* Command to unlock bootloader */
+#define MXT_UNLOCK_CMD_MSB      0xaa
+#define MXT_UNLOCK_CMD_LSB      0xdc
+
+/* Bootloader mode status */
+#define MXT_WAITING_BOOTLOAD_CMD        0xc0    /* valid 7 6 bit only */
+#define MXT_WAITING_FRAME_DATA  0x80    /* valid 7 6 bit only */
+#define MXT_FRAME_CRC_CHECK     0x02
+#define MXT_FRAME_CRC_FAIL      0x03
+#define MXT_FRAME_CRC_PASS      0x04
+#define MXT_APP_CRC_FAIL        0x40    /* valid 7 8 bit only */
+#define MXT_BOOT_STATUS_MASK    0x3f
+
+/* Touch status */
+#define MXT_SUPPRESS            (1 << 1)
+#define MXT_AMP                 (1 << 2)
+#define MXT_VECTOR              (1 << 3)
+#define MXT_MOVE                (1 << 4)
+#define MXT_RELEASE             (1 << 5)
+#define MXT_PRESS               (1 << 6)
+#define MXT_DETECT              (1 << 7)
+
+/* Touchscreen absolute values */
+#define MXT_MAX_XC              0x3ff
+#define MXT_MAX_YC              0x3ff
+#define MXT_MAX_AREA            0xff
+
+#define MXT_MAX_FINGER          10
+
+struct mxt_info {
+        u8 family_id;
+        u8 variant_id;
+        u8 version;
+        u8 build;
+        u8 matrix_xsize;
+        u8 matrix_ysize;
+        u8 object_num;
+};
+
+struct mxt_object {
+        u8 type;
+        u16 start_address;
+        u8 size;
+        u8 instances;
+        u8 num_report_ids;
+
+        /* to map object and message */
+        u8 max_reportid;
+};
+
+struct mxt_message {
+        u8 reportid;
+        u8 message[7];
+        u8 checksum;
+};
+
+struct mxt_finger {
+        int status;
+        int x;
+        int y;
+        int area;
+};
+
+/* Each client has this additional data */
+struct mxt_data {
+        struct i2c_client *client;
+        struct input_dev *input_dev;
+        const struct mxt_platform_data *pdata;
+        struct mxt_object *object_table;
+        struct mxt_info info;
+        struct mxt_finger finger[MXT_MAX_FINGER];
+        unsigned int irq;
+};
+
+static bool mxt_object_readable(unsigned int type)
+{
+        switch (type) {
+        case MXT_GEN_MESSAGE:
+        case MXT_GEN_COMMAND:
+        case MXT_GEN_POWER:
+        case MXT_GEN_ACQUIRE:
+        case MXT_TOUCH_MULTI:
+        case MXT_TOUCH_KEYARRAY:
+        case MXT_TOUCH_PROXIMITY:
+        case MXT_PROCI_GRIPFACE:
+        case MXT_PROCG_NOISE:
+        case MXT_PROCI_ONETOUCH:
+        case MXT_PROCI_TWOTOUCH:
+        case MXT_PROCI_GRIP:
+        case MXT_PROCI_PALM:
+        case MXT_SPT_COMMSCONFIG:
+        case MXT_SPT_GPIOPWM:
+        case MXT_SPT_SELFTEST:
+        case MXT_SPT_CTECONFIG:
+        case MXT_SPT_USERDATA:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static bool mxt_object_writable(unsigned int type)
+{
+        switch (type) {
+        case MXT_GEN_COMMAND:
+        case MXT_GEN_POWER:
+        case MXT_GEN_ACQUIRE:
+        case MXT_TOUCH_MULTI:
+        case MXT_TOUCH_KEYARRAY:
+        case MXT_TOUCH_PROXIMITY:
+        case MXT_PROCI_GRIPFACE:
+        case MXT_PROCG_NOISE:
+        case MXT_PROCI_ONETOUCH:
+        case MXT_PROCI_TWOTOUCH:
+        case MXT_PROCI_GRIP:
+        case MXT_PROCI_PALM:
+        case MXT_SPT_GPIOPWM:
+        case MXT_SPT_SELFTEST:
+        case MXT_SPT_CTECONFIG:
+                return true;
+        default:
+                return false;
+        }
+}
+
+static void mxt_dump_message(struct device *dev,
+                                  struct mxt_message *message)
+{
+        dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
+        dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
+        dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
+        dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
+        dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
+        dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
+        dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
+        dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
+        dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
+}
+
+static int mxt_check_bootloader(struct i2c_client *client,
+                                     unsigned int state)
+{
+        u8 val;
+
+recheck:
+        if (i2c_master_recv(client, &val, 1) != 1) {
+                dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
+                return -EIO;
+        }
+
+        switch (state) {
+        case MXT_WAITING_BOOTLOAD_CMD:
+        case MXT_WAITING_FRAME_DATA:
+                val &= ~MXT_BOOT_STATUS_MASK;
+                break;
+        case MXT_FRAME_CRC_PASS:
+                if (val == MXT_FRAME_CRC_CHECK)
+                        goto recheck;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        if (val != state) {
+                dev_err(&client->dev, "Unvalid bootloader mode state\n");
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static int mxt_unlock_bootloader(struct i2c_client *client)
+{
+        u8 buf[2];
+
+        buf[0] = MXT_UNLOCK_CMD_LSB;
+        buf[1] = MXT_UNLOCK_CMD_MSB;
+
+        if (i2c_master_send(client, buf, 2) != 2) {
+                dev_err(&client->dev, "%s: i2c send failed\n", __func__);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static int mxt_fw_write(struct i2c_client *client,
+                             const u8 *data, unsigned int frame_size)
+{
+        if (i2c_master_send(client, data, frame_size) != frame_size) {
+                dev_err(&client->dev, "%s: i2c send failed\n", __func__);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static int __mxt_read_reg(struct i2c_client *client,
+                               u16 reg, u16 len, void *val)
+{
+        struct i2c_msg xfer[2];
+        u8 buf[2];
+
+        buf[0] = reg & 0xff;
+        buf[1] = (reg >> 8) & 0xff;
+
+        /* Write register */
+        xfer[0].addr = client->addr;
+        xfer[0].flags = 0;
+        xfer[0].len = 2;
+        xfer[0].buf = buf;
+
+        /* Read data */
+        xfer[1].addr = client->addr;
+        xfer[1].flags = I2C_M_RD;
+        xfer[1].len = len;
+        xfer[1].buf = val;
+
+        if (i2c_transfer(client->adapter, xfer, 2) != 2) {
+                dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
+{
+        return __mxt_read_reg(client, reg, 1, val);
+}
+
+static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
+{
+        u8 buf[3];
+
+        buf[0] = reg & 0xff;
+        buf[1] = (reg >> 8) & 0xff;
+        buf[2] = val;
+
+        if (i2c_master_send(client, buf, 3) != 3) {
+                dev_err(&client->dev, "%s: i2c send failed\n", __func__);
+                return -EIO;
+        }
+
+        return 0;
+}
+
+static int mxt_read_object_table(struct i2c_client *client,
+                                      u16 reg, u8 *object_buf)
+{
+        return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
+                                   object_buf);
+}
+
+static struct mxt_object *
+mxt_get_object(struct mxt_data *data, u8 type)
+{
+        struct mxt_object *object;
+        int i;
+
+        for (i = 0; i < data->info.object_num; i++) {
+                object = data->object_table + i;
+                if (object->type == type)
+                        return object;
+        }
+
+        dev_err(&data->client->dev, "Invalid object type\n");
+        return NULL;
+}
+
+static int mxt_read_message(struct mxt_data *data,
+                                 struct mxt_message *message)
+{
+        struct mxt_object *object;
+        u16 reg;
+
+        object = mxt_get_object(data, MXT_GEN_MESSAGE);
+        if (!object)
+                return -EINVAL;
+
+        reg = object->start_address;
+        return __mxt_read_reg(data->client, reg,
+                        sizeof(struct mxt_message), message);
+}
+
+static int mxt_read_object(struct mxt_data *data,
+                                u8 type, u8 offset, u8 *val)
+{
+        struct mxt_object *object;
+        u16 reg;
+
+        object = mxt_get_object(data, type);
+        if (!object)
+                return -EINVAL;
+
+        reg = object->start_address;
+        return __mxt_read_reg(data->client, reg + offset, 1, val);
+}
+
+static int mxt_write_object(struct mxt_data *data,
+                                 u8 type, u8 offset, u8 val)
+{
+        struct mxt_object *object;
+        u16 reg;
+
+        object = mxt_get_object(data, type);
+        if (!object)
+                return -EINVAL;
+
+        reg = object->start_address;
+        return mxt_write_reg(data->client, reg + offset, val);
+}
+
+static void mxt_input_report(struct mxt_data *data, int single_id)
+{
+        struct mxt_finger *finger = data->finger;
+        struct input_dev *input_dev = data->input_dev;
+        int status = finger[single_id].status;
+        int finger_num = 0;
+        int id;
+
+        for (id = 0; id < MXT_MAX_FINGER; id++) {
+                if (!finger[id].status)
+                        continue;
+
+                input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
+                                finger[id].status != MXT_RELEASE ?
+                                finger[id].area : 0);
+                input_report_abs(input_dev, ABS_MT_POSITION_X,
+                                finger[id].x);
+                input_report_abs(input_dev, ABS_MT_POSITION_Y,
+                                finger[id].y);
+                input_mt_sync(input_dev);
+
+                if (finger[id].status == MXT_RELEASE)
+                        finger[id].status = 0;
+                else
+                        finger_num++;
+        }
+
+        input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
+
+        if (status != MXT_RELEASE) {
+                input_report_abs(input_dev, ABS_X, finger[single_id].x);
+                input_report_abs(input_dev, ABS_Y, finger[single_id].y);
+        }
+
+        input_sync(input_dev);
+}
+
+static void mxt_input_touchevent(struct mxt_data *data,
+                                      struct mxt_message *message, int id)
+{
+        struct mxt_finger *finger = data->finger;
+        struct device *dev = &data->client->dev;
+        u8 status = message->message[0];
+        int x;
+        int y;
+        int area;
+
+        /* Check the touch is present on the screen */
+        if (!(status & MXT_DETECT)) {
+                if (status & MXT_RELEASE) {
+                        dev_dbg(dev, "[%d] released\n", id);
+
+                        finger[id].status = MXT_RELEASE;
+                        mxt_input_report(data, id);
+                }
+                return;
+        }
+
+        /* Check only AMP detection */
+        if (!(status & (MXT_PRESS | MXT_MOVE)))
+                return;
+
+        x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
+        y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
+        area = message->message[4];
+
+        dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
+                status & MXT_MOVE ? "moved" : "pressed",
+                x, y, area);
+
+        finger[id].status = status & MXT_MOVE ?
+                                MXT_MOVE : MXT_PRESS;
+        finger[id].x = x;
+        finger[id].y = y;
+        finger[id].area = area;
+
+        mxt_input_report(data, id);
+}
+
+static irqreturn_t mxt_interrupt(int irq, void *dev_id)
+{
+        struct mxt_data *data = dev_id;
+        struct mxt_message message;
+        struct mxt_object *object;
+        struct device *dev = &data->client->dev;
+        int id;
+        u8 reportid;
+        u8 max_reportid;
+        u8 min_reportid;
+
+        do {
+                if (mxt_read_message(data, &message)) {
+                        dev_err(dev, "Failed to read message\n");
+                        goto end;
+                }
+
+                reportid = message.reportid;
+
+                /* whether reportid is thing of MXT_TOUCH_MULTI */
+                object = mxt_get_object(data, MXT_TOUCH_MULTI);
+                if (!object)
+                        goto end;
+
+                max_reportid = object->max_reportid;
+                min_reportid = max_reportid - object->num_report_ids + 1;
+                id = reportid - min_reportid;
+
+                if (reportid >= min_reportid && reportid <= max_reportid)
+                        mxt_input_touchevent(data, &message, id);
+                else
+                        mxt_dump_message(dev, &message);
+        } while (reportid != 0xff);
+
+end:
+        return IRQ_HANDLED;
+}
+
+static int mxt_check_reg_init(struct mxt_data *data)
+{
+        const struct mxt_platform_data *pdata = data->pdata;
+        struct mxt_object *object;
+        struct device *dev = &data->client->dev;
+        int index = 0;
+        int i, j, config_offset;
+
+        if (!pdata->config) {
+                dev_dbg(dev, "No cfg data defined, skipping reg init\n");
+                return 0;
+        }
+
+        for (i = 0; i < data->info.object_num; i++) {
+                object = data->object_table + i;
+
+                if (!mxt_object_writable(object->type))
+                        continue;
+
+                for (j = 0; j < object->size + 1; j++) {
+                        config_offset = index + j;
+                        if (config_offset > pdata->config_length) {
+                                dev_err(dev, "Not enough config data!\n");
+                                return -EINVAL;
+                        }
+                        mxt_write_object(data, object->type, j,
+                                         pdata->config[config_offset]);
+                }
+                index += object->size + 1;
+        }
+
+        return 0;
+}
+
+static int mxt_make_highchg(struct mxt_data *data)
+{
+        struct device *dev = &data->client->dev;
+        struct mxt_message message;
+        int count = 10;
+        int error;
+
+        /* Read dummy message to make high CHG pin */
+        do {
+                error = mxt_read_message(data, &message);
+                if (error)
+                        return error;
+        } while (message.reportid != 0xff && --count);
+
+        if (!count) {
+                dev_err(dev, "CHG pin isn't cleared\n");
+                return -EBUSY;
+        }
+
+        return 0;
+}
+
+static void mxt_handle_pdata(struct mxt_data *data)
+{
+        const struct mxt_platform_data *pdata = data->pdata;
+        u8 voltage;
+
+        /* Set touchscreen lines */
+        mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
+                        pdata->x_line);
+        mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
+                        pdata->y_line);
+
+        /* Set touchscreen orient */
+        mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
+                        pdata->orient);
+
+        /* Set touchscreen burst length */
+        mxt_write_object(data, MXT_TOUCH_MULTI,
+                        MXT_TOUCH_BLEN, pdata->blen);
+
+        /* Set touchscreen threshold */
+        mxt_write_object(data, MXT_TOUCH_MULTI,
+                        MXT_TOUCH_TCHTHR, pdata->threshold);
+
+        /* Set touchscreen resolution */
+        mxt_write_object(data, MXT_TOUCH_MULTI,
+                        MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
+        mxt_write_object(data, MXT_TOUCH_MULTI,
+                        MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
+        mxt_write_object(data, MXT_TOUCH_MULTI,
+                        MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
+        mxt_write_object(data, MXT_TOUCH_MULTI,
+                        MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
+
+        /* Set touchscreen voltage */
+        if (pdata->voltage) {
+                if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
+                        voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
+                                MXT_VOLTAGE_STEP;
+                        voltage = 0xff - voltage + 1;
+                } else
+                        voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
+                                MXT_VOLTAGE_STEP;
+
+                mxt_write_object(data, MXT_SPT_CTECONFIG,
+                                MXT_CTE_VOLTAGE, voltage);
+        }
+}
+
+static int mxt_get_info(struct mxt_data *data)
+{
+        struct i2c_client *client = data->client;
+        struct mxt_info *info = &data->info;
+        int error;
+        u8 val;
+
+        error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
+        if (error)
+                return error;
+        info->family_id = val;
+
+        error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
+        if (error)
+                return error;
+        info->variant_id = val;
+
+        error = mxt_read_reg(client, MXT_VERSION, &val);
+        if (error)
+                return error;
+        info->version = val;
+
+        error = mxt_read_reg(client, MXT_BUILD, &val);
+        if (error)
+                return error;
+        info->build = val;
+
+        error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
+        if (error)
+                return error;
+        info->object_num = val;
+
+        return 0;
+}
+
+static int mxt_get_object_table(struct mxt_data *data)
+{
+        int error;
+        int i;
+        u16 reg;
+        u8 reportid = 0;
+        u8 buf[MXT_OBJECT_SIZE];
+
+        for (i = 0; i < data->info.object_num; i++) {
+                struct mxt_object *object = data->object_table + i;
+
+                reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
+                error = mxt_read_object_table(data->client, reg, buf);
+                if (error)
+                        return error;
+
+                object->type = buf[0];
+                object->start_address = (buf[2] << 8) | buf[1];
+                object->size = buf[3];
+                object->instances = buf[4];
+                object->num_report_ids = buf[5];
+
+                if (object->num_report_ids) {
+                        reportid += object->num_report_ids *
+                                        (object->instances + 1);
+                        object->max_reportid = reportid;
+                }
+        }
+
+        return 0;
+}
+
+static int mxt_initialize(struct mxt_data *data)
+{
+        struct i2c_client *client = data->client;
+        struct mxt_info *info = &data->info;
+        int error;
+        u8 val;
+
+        error = mxt_get_info(data);
+        if (error)
+                return error;
+
+        data->object_table = kcalloc(info->object_num,
+                                     sizeof(struct mxt_object),
+                                     GFP_KERNEL);
+        if (!data->object_table) {
+                dev_err(&client->dev, "Failed to allocate memory\n");
+                return -ENOMEM;
+        }
+
+        /* Get object table information */
+        error = mxt_get_object_table(data);
+        if (error)
+                return error;
+
+        /* Check register init values */
+        error = mxt_check_reg_init(data);
+        if (error)
+                return error;
+
+        error = mxt_make_highchg(data);
+        if (error)
+                return error;
+
+        mxt_handle_pdata(data);
+
+        /* Backup to memory */
+        mxt_write_object(data, MXT_GEN_COMMAND,
+                        MXT_COMMAND_BACKUPNV,
+                        MXT_BACKUP_VALUE);
+        msleep(MXT_BACKUP_TIME);
+
+        /* Soft reset */
+        mxt_write_object(data, MXT_GEN_COMMAND,
+                        MXT_COMMAND_RESET, 1);
+        msleep(MXT_RESET_TIME);
+
+        /* Update matrix size at info struct */
+        error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
+        if (error)
+                return error;
+        info->matrix_xsize = val;
+
+        error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
+        if (error)
+                return error;
+        info->matrix_ysize = val;
+
+        dev_info(&client->dev,
+                        "Family ID: %d Variant ID: %d Version: %d Build: %d\n",
+                        info->family_id, info->variant_id, info->version,
+                        info->build);
+
+        dev_info(&client->dev,
+                        "Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
+                        info->matrix_xsize, info->matrix_ysize,
+                        info->object_num);
+
+        return 0;
+}
+
+static ssize_t mxt_object_show(struct device *dev,
+                                    struct device_attribute *attr, char *buf)
+{
+        struct mxt_data *data = dev_get_drvdata(dev);
+        struct mxt_object *object;
+        int count = 0;
+        int i, j;
+        int error;
+        u8 val;
+
+        for (i = 0; i < data->info.object_num; i++) {
+                object = data->object_table + i;
+
+                count += sprintf(buf + count,
+                                "Object Table Element %d(Type %d)\n",
+                                i + 1, object->type);
+
+                if (!mxt_object_readable(object->type)) {
+                        count += sprintf(buf + count, "\n");
+                        continue;
+                }
+
+                for (j = 0; j < object->size + 1; j++) {
+                        error = mxt_read_object(data,
+                                                object->type, j, &val);
+                        if (error)
+                                return error;
+
+                        count += sprintf(buf + count,
+                                        "  Byte %d: 0x%x (%d)\n", j, val, val);
+                }
+
+                count += sprintf(buf + count, "\n");
+        }
+
+        return count;
+}
+
+static int mxt_load_fw(struct device *dev, const char *fn)
+{
+        struct mxt_data *data = dev_get_drvdata(dev);
+        struct i2c_client *client = data->client;
+        const struct firmware *fw = NULL;
+        unsigned int frame_size;
+        unsigned int pos = 0;
+        int ret;
+
+        ret = request_firmware(&fw, fn, dev);
+        if (ret) {
+                dev_err(dev, "Unable to open firmware %s\n", fn);
+                return ret;
+        }
+
+        /* Change to the bootloader mode */
+        mxt_write_object(data, MXT_GEN_COMMAND,
+                        MXT_COMMAND_RESET, MXT_BOOT_VALUE);
+        msleep(MXT_RESET_TIME);
+
+        /* Change to slave address of bootloader */
+        if (client->addr == MXT_APP_LOW)
+                client->addr = MXT_BOOT_LOW;
+        else
+                client->addr = MXT_BOOT_HIGH;
+
+        ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
+        if (ret)
+                goto out;
+
+        /* Unlock bootloader */
+        mxt_unlock_bootloader(client);
+
+        while (pos < fw->size) {
+                ret = mxt_check_bootloader(client,
+                                                MXT_WAITING_FRAME_DATA);
+                if (ret)
+                        goto out;
+
+                frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
+
+                /* We should add 2 at frame size as the the firmware data is not
+                 * included the CRC bytes.
+                 */
+                frame_size += 2;
+
+                /* Write one frame to device */
+                mxt_fw_write(client, fw->data + pos, frame_size);
+
+                ret = mxt_check_bootloader(client,
+                                                MXT_FRAME_CRC_PASS);
+                if (ret)
+                        goto out;
+
+                pos += frame_size;
+
+                dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
+        }
+
+out:
+        release_firmware(fw);
+
+        /* Change to slave address of application */
+        if (client->addr == MXT_BOOT_LOW)
+                client->addr = MXT_APP_LOW;
+        else
+                client->addr = MXT_APP_HIGH;
+
+        return ret;
+}
+
+static ssize_t mxt_update_fw_store(struct device *dev,
+                                        struct device_attribute *attr,
+                                        const char *buf, size_t count)
+{
+        struct mxt_data *data = dev_get_drvdata(dev);
+        int error;
+
+        disable_irq(data->irq);
+
+        error = mxt_load_fw(dev, MXT_FW_NAME);
+        if (error) {
+                dev_err(dev, "The firmware update failed(%d)\n", error);
+                count = error;
+        } else {
+                dev_dbg(dev, "The firmware update succeeded\n");
+
+                /* Wait for reset */
+                msleep(MXT_FWRESET_TIME);
+
+                kfree(data->object_table);
+                data->object_table = NULL;
+
+                mxt_initialize(data);
+        }
+
+        enable_irq(data->irq);
+
+        return count;
+}
+
+static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
+static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
+
+static struct attribute *mxt_attrs[] = {
+        &dev_attr_object.attr,
+        &dev_attr_update_fw.attr,
+        NULL
+};
+
+static const struct attribute_group mxt_attr_group = {
+        .attrs = mxt_attrs,
+};
+
+static void mxt_start(struct mxt_data *data)
+{
+        /* Touch enable */
+        mxt_write_object(data,
+                        MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
+}
+
+static void mxt_stop(struct mxt_data *data)
+{
+        /* Touch disable */
+        mxt_write_object(data,
+                        MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
+}
+
+static int mxt_input_open(struct input_dev *dev)
+{
+        struct mxt_data *data = input_get_drvdata(dev);
+
+        mxt_start(data);
+
+        return 0;
+}
+
+static void mxt_input_close(struct input_dev *dev)
+{
+        struct mxt_data *data = input_get_drvdata(dev);
+
+        mxt_stop(data);
+}
+
+static int __devinit mxt_probe(struct i2c_client *client,
+                const struct i2c_device_id *id)
+{
+        const struct mxt_platform_data *pdata = client->dev.platform_data;
+        struct mxt_data *data;
+        struct input_dev *input_dev;
+        int error;
+
+        if (!pdata)
+                return -EINVAL;
+
+        data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
+        input_dev = input_allocate_device();
+        if (!data || !input_dev) {
+                dev_err(&client->dev, "Failed to allocate memory\n");
+                error = -ENOMEM;
+                goto err_free_mem;
+        }
+
+        input_dev->name = "Atmel maXTouch Touchscreen";
+        input_dev->id.bustype = BUS_I2C;
+        input_dev->dev.parent = &client->dev;
+        input_dev->open = mxt_input_open;
+        input_dev->close = mxt_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, MXT_MAX_XC, 0, 0);
+        input_set_abs_params(input_dev, ABS_Y,
+                             0, MXT_MAX_YC, 0, 0);
+
+        /* For multi touch */
+        input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
+                             0, MXT_MAX_AREA, 0, 0);
+        input_set_abs_params(input_dev, ABS_MT_POSITION_X,
+                             0, MXT_MAX_XC, 0, 0);
+        input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+                             0, MXT_MAX_YC, 0, 0);
+
+        input_set_drvdata(input_dev, data);
+
+        data->client = client;
+        data->input_dev = input_dev;
+        data->pdata = pdata;
+        data->irq = client->irq;
+
+        i2c_set_clientdata(client, data);
+
+        error = mxt_initialize(data);
+        if (error)
+                goto err_free_object;
+
+        error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
+                        pdata->irqflags, client->dev.driver->name, data);
+        if (error) {
+                dev_err(&client->dev, "Failed to register interrupt\n");
+                goto err_free_object;
+        }
+
+        error = input_register_device(input_dev);
+        if (error)
+                goto err_free_irq;
+
+        error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
+        if (error)
+                goto err_unregister_device;
+
+        return 0;
+
+err_unregister_device:
+        input_unregister_device(input_dev);
+        input_dev = NULL;
+err_free_irq:
+        free_irq(client->irq, data);
+err_free_object:
+        kfree(data->object_table);
+err_free_mem:
+        input_free_device(input_dev);
+        kfree(data);
+        return error;
+}
+
+static int __devexit mxt_remove(struct i2c_client *client)
+{
+        struct mxt_data *data = i2c_get_clientdata(client);
+
+        sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
+        free_irq(data->irq, data);
+        input_unregister_device(data->input_dev);
+        kfree(data->object_table);
+        kfree(data);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int mxt_suspend(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct mxt_data *data = i2c_get_clientdata(client);
+        struct input_dev *input_dev = data->input_dev;
+
+        mutex_lock(&input_dev->mutex);
+
+        if (input_dev->users)
+                mxt_stop(data);
+
+        mutex_unlock(&input_dev->mutex);
+
+        return 0;
+}
+
+static int mxt_resume(struct device *dev)
+{
+        struct i2c_client *client = to_i2c_client(dev);
+        struct mxt_data *data = i2c_get_clientdata(client);
+        struct input_dev *input_dev = data->input_dev;
+
+        /* Soft reset */
+        mxt_write_object(data, MXT_GEN_COMMAND,
+                        MXT_COMMAND_RESET, 1);
+
+        msleep(MXT_RESET_TIME);
+
+        mutex_lock(&input_dev->mutex);
+
+        if (input_dev->users)
+                mxt_start(data);
+
+        mutex_unlock(&input_dev->mutex);
+
+        return 0;
+}
+
+static const struct dev_pm_ops mxt_pm_ops = {
+        .suspend        = mxt_suspend,
+        .resume         = mxt_resume,
+};
+#endif
+
+static const struct i2c_device_id mxt_id[] = {
+        { "qt602240_ts", 0 },
+        { "atmel_mxt_ts", 0 },
+        { "mXT224", 0 },
+        { }
+};
+MODULE_DEVICE_TABLE(i2c, mxt_id);
+
+static struct i2c_driver mxt_driver = {
+        .driver = {
+                .name   = "atmel_mxt_ts",
+                .owner  = THIS_MODULE,
+#ifdef CONFIG_PM
+                .pm     = &mxt_pm_ops,
+#endif
+        },
+        .probe          = mxt_probe,
+        .remove         = __devexit_p(mxt_remove),
+        .id_table       = mxt_id,
+};
+
+static int __init mxt_init(void)
+{
+        return i2c_add_driver(&mxt_driver);
+}
+
+static void __exit mxt_exit(void)
+{
+        i2c_del_driver(&mxt_driver);
+}
+
+module_init(mxt_init);
+module_exit(mxt_exit);
+
+/* Module information */
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
+MODULE_LICENSE("GPL");