Initial file dump from open source releaseHEADmaster

1 files changed, 1342 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 00000000..59aa2400
--- /dev/null
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -0,0 +1,1342 @@
+/*
+ * 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/mt.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_INFO		0x00
+#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_T37	37
+#define MXT_GEN_MESSAGE_T5		5
+#define MXT_GEN_COMMAND_T6		6
+#define MXT_GEN_POWER_T7		7
+#define MXT_GEN_ACQUIRE_T8		8
+#define MXT_GEN_DATASOURCE_T53		53
+#define MXT_TOUCH_MULTI_T9		9
+#define MXT_TOUCH_KEYARRAY_T15		15
+#define MXT_TOUCH_PROXIMITY_T23		23
+#define MXT_TOUCH_PROXKEY_T52		52
+#define MXT_PROCI_GRIPFACE_T20		20
+#define MXT_PROCG_NOISE_T22		22
+#define MXT_PROCI_ONETOUCH_T24		24
+#define MXT_PROCI_TWOTOUCH_T27		27
+#define MXT_PROCI_GRIP_T40		40
+#define MXT_PROCI_PALM_T41		41
+#define MXT_PROCI_TOUCHSUPPRESSION_T42	42
+#define MXT_PROCI_STYLUS_T47		47
+#define MXT_PROCG_NOISESUPPRESSION_T48	48
+#define MXT_SPT_COMMSCONFIG_T18		18
+#define MXT_SPT_GPIOPWM_T19		19
+#define MXT_SPT_SELFTEST_T25		25
+#define MXT_SPT_CTECONFIG_T28		28
+#define MXT_SPT_USERDATA_T38		38
+#define MXT_SPT_DIGITIZER_T43		43
+#define MXT_SPT_MESSAGECOUNT_T44	44
+#define MXT_SPT_CTECONFIG_T46		46
+
+/* MXT_GEN_COMMAND_T6 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_T7 field */
+#define MXT_POWER_IDLEACQINT	0
+#define MXT_POWER_ACTVACQINT	1
+#define MXT_POWER_ACTV2IDLETO	2
+
+/* MXT_GEN_ACQUIRE_T8 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_T9 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_T20 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_T18 */
+#define MXT_COMMS_CTRL		0
+#define MXT_COMMS_CMD		1
+
+/* MXT_SPT_CTECONFIG_T28 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_T6 */
+#define MXT_BOOT_VALUE		0xa5
+#define MXT_BACKUP_VALUE	0x55
+#define MXT_BACKUP_TIME		50	/* msec */
+#define MXT_RESET_TIME		200	/* msec */
+
+#define MXT_FWRESET_TIME	175	/* msec */
+
+/* MXT_SPT_GPIOPWM_T19 field */
+#define MXT_GPIO0_MASK		0x04
+#define MXT_GPIO1_MASK		0x08
+#define MXT_GPIO2_MASK		0x10
+#define MXT_GPIO3_MASK		0x20
+
+/* 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_UNGRIP		(1 << 0)
+#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)
+
+/* Touch orient bits */
+#define MXT_XY_SWITCH		(1 << 0)
+#define MXT_X_INVERT		(1 << 1)
+#define MXT_Y_INVERT		(1 << 2)
+
+/* Touchscreen absolute values */
+#define MXT_MAX_AREA		0xff
+
+#define MXT_PIXELS_PER_MM	20
+
+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;		/* Size of each instance - 1 */
+	u8 instances;		/* Number of instances - 1 */
+	u8 num_report_ids;
+} __packed;
+
+struct mxt_message {
+	u8 reportid;
+	u8 message[7];
+};
+
+/* Each client has this additional data */
+struct mxt_data {
+	struct i2c_client *client;
+	struct input_dev *input_dev;
+	char phys[64];		/* device physical location */
+	const struct mxt_platform_data *pdata;
+	struct mxt_object *object_table;
+	struct mxt_info info;
+	bool is_tp;
+
+	unsigned int irq;
+	unsigned int max_x;
+	unsigned int max_y;
+
+	/* Cached parameters from object table */
+	u8 T6_reportid;
+	u8 T9_reportid_min;
+	u8 T9_reportid_max;
+	u8 T19_reportid;
+};
+
+static bool mxt_object_readable(unsigned int type)
+{
+	switch (type) {
+	case MXT_GEN_COMMAND_T6:
+	case MXT_GEN_POWER_T7:
+	case MXT_GEN_ACQUIRE_T8:
+	case MXT_GEN_DATASOURCE_T53:
+	case MXT_TOUCH_MULTI_T9:
+	case MXT_TOUCH_KEYARRAY_T15:
+	case MXT_TOUCH_PROXIMITY_T23:
+	case MXT_TOUCH_PROXKEY_T52:
+	case MXT_PROCI_GRIPFACE_T20:
+	case MXT_PROCG_NOISE_T22:
+	case MXT_PROCI_ONETOUCH_T24:
+	case MXT_PROCI_TWOTOUCH_T27:
+	case MXT_PROCI_GRIP_T40:
+	case MXT_PROCI_PALM_T41:
+	case MXT_PROCI_TOUCHSUPPRESSION_T42:
+	case MXT_PROCI_STYLUS_T47:
+	case MXT_PROCG_NOISESUPPRESSION_T48:
+	case MXT_SPT_COMMSCONFIG_T18:
+	case MXT_SPT_GPIOPWM_T19:
+	case MXT_SPT_SELFTEST_T25:
+	case MXT_SPT_CTECONFIG_T28:
+	case MXT_SPT_USERDATA_T38:
+	case MXT_SPT_DIGITIZER_T43:
+	case MXT_SPT_CTECONFIG_T46:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool mxt_object_writable(unsigned int type)
+{
+	switch (type) {
+	case MXT_GEN_COMMAND_T6:
+	case MXT_GEN_POWER_T7:
+	case MXT_GEN_ACQUIRE_T8:
+	case MXT_TOUCH_MULTI_T9:
+	case MXT_TOUCH_KEYARRAY_T15:
+	case MXT_TOUCH_PROXIMITY_T23:
+	case MXT_TOUCH_PROXKEY_T52:
+	case MXT_PROCI_GRIPFACE_T20:
+	case MXT_PROCG_NOISE_T22:
+	case MXT_PROCI_ONETOUCH_T24:
+	case MXT_PROCI_TWOTOUCH_T27:
+	case MXT_PROCI_GRIP_T40:
+	case MXT_PROCI_PALM_T41:
+	case MXT_PROCI_TOUCHSUPPRESSION_T42:
+	case MXT_PROCI_STYLUS_T47:
+	case MXT_PROCG_NOISESUPPRESSION_T48:
+	case MXT_SPT_COMMSCONFIG_T18:
+	case MXT_SPT_GPIOPWM_T19:
+	case MXT_SPT_SELFTEST_T25:
+	case MXT_SPT_CTECONFIG_T28:
+	case MXT_SPT_DIGITIZER_T43:
+	case MXT_SPT_CTECONFIG_T46:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static void mxt_dump_message(struct device *dev,
+			     struct mxt_message *message)
+{
+	dev_dbg(dev, "reportid: %u\tmessage: %*ph\n",
+		message->reportid, 7, message->message);
+}
+
+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];
+	int ret;
+
+	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;
+
+	ret = i2c_transfer(client->adapter, xfer, 2);
+	if (ret == 2) {
+		ret = 0;
+	} else {
+		if (ret >= 0)
+			ret = -EIO;
+		dev_err(&client->dev, "%s: i2c transfer failed (%d)\n",
+			__func__, ret);
+	}
+
+	return ret;
+}
+
+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, u16 len,
+			   const void *val)
+{
+	u8 *buf;
+	size_t count;
+	int ret;
+
+	count = len + 2;
+	buf = kmalloc(count, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	buf[0] = reg & 0xff;
+	buf[1] = (reg >> 8) & 0xff;
+	memcpy(&buf[2], val, len);
+
+	ret = i2c_master_send(client, buf, count);
+	if (ret == count) {
+		ret = 0;
+	} else {
+		if (ret >= 0)
+			ret = -EIO;
+		dev_err(&client->dev, "%s: i2c send failed (%d)\n",
+			__func__, ret);
+	}
+
+	kfree(buf);
+	return ret;
+}
+
+static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
+{
+	return __mxt_write_reg(client, reg, 1, &val);
+}
+
+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_T5);
+	if (!object)
+		return -EINVAL;
+
+	reg = object->start_address;
+	return __mxt_read_reg(data->client, reg,
+			sizeof(struct mxt_message), message);
+}
+
+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 || offset >= object->size + 1)
+		return -EINVAL;
+
+	reg = object->start_address;
+	return mxt_write_reg(data->client, reg + offset, val);
+}
+
+static void mxt_input_button(struct mxt_data *data, struct mxt_message *message)
+{
+	struct input_dev *input = data->input_dev;
+	bool button;
+	int i;
+
+	/* Active-low switch */
+	for (i = 0; i < MXT_NUM_GPIO; i++) {
+		if (data->pdata->key_map[i] == KEY_RESERVED)
+			continue;
+		button = !(message->message[0] & MXT_GPIO0_MASK << i);
+		input_report_key(input, data->pdata->key_map[i], button);
+	}
+}
+
+static void mxt_input_touchevent(struct mxt_data *data,
+				      struct mxt_message *message, int id)
+{
+	struct device *dev = &data->client->dev;
+	u8 status = message->message[0];
+	struct input_dev *input_dev = data->input_dev;
+	int x;
+	int y;
+	int area;
+	int pressure;
+
+	x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
+	y = (message->message[2] << 4) | ((message->message[3] & 0xf));
+	if (data->max_x < 1024)
+		x = x >> 2;
+	if (data->max_y < 1024)
+		y = y >> 2;
+
+	area = message->message[4];
+	pressure = message->message[5];
+
+	dev_dbg(dev,
+		"[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n",
+		id,
+		(status & MXT_DETECT) ? 'D' : '.',
+		(status & MXT_PRESS) ? 'P' : '.',
+		(status & MXT_RELEASE) ? 'R' : '.',
+		(status & MXT_MOVE) ? 'M' : '.',
+		(status & MXT_VECTOR) ? 'V' : '.',
+		(status & MXT_AMP) ? 'A' : '.',
+		(status & MXT_SUPPRESS) ? 'S' : '.',
+		(status & MXT_UNGRIP) ? 'U' : '.',
+		x, y, area, pressure);
+
+	input_mt_slot(input_dev, id);
+	input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
+				   status & MXT_DETECT);
+
+	if (status & MXT_DETECT) {
+		input_report_abs(input_dev, ABS_MT_POSITION_X, x);
+		input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
+		input_report_abs(input_dev, ABS_MT_PRESSURE, pressure);
+		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area);
+	}
+}
+
+static unsigned mxt_extract_T6_csum(const u8 *csum)
+{
+	return csum[0] | (csum[1] << 8) | (csum[2] << 16);
+}
+
+static bool mxt_is_T9_message(struct mxt_data *data, struct mxt_message *msg)
+{
+	u8 id = msg->reportid;
+	return (id >= data->T9_reportid_min && id <= data->T9_reportid_max);
+}
+
+static irqreturn_t mxt_interrupt(int irq, void *dev_id)
+{
+	struct mxt_data *data = dev_id;
+	struct mxt_message message;
+	const u8 *payload = &message.message[0];
+	struct device *dev = &data->client->dev;
+	u8 reportid;
+	bool update_input = false;
+
+	do {
+		if (mxt_read_message(data, &message)) {
+			dev_err(dev, "Failed to read message\n");
+			goto end;
+		}
+
+		reportid = message.reportid;
+
+		if (reportid == data->T6_reportid) {
+			u8 status = payload[0];
+			unsigned csum = mxt_extract_T6_csum(&payload[1]);
+			dev_dbg(dev, "Status: %02x Config Checksum: %06x\n",
+				status, csum);
+		} else if (mxt_is_T9_message(data, &message)) {
+			int id = reportid - data->T9_reportid_min;
+			mxt_input_touchevent(data, &message, id);
+			update_input = true;
+		} else if (message.reportid == data->T19_reportid) {
+			mxt_input_button(data, &message);
+			update_input = true;
+		} else {
+			mxt_dump_message(dev, &message);
+		}
+	} while (reportid != 0xff);
+
+	if (update_input) {
+		input_mt_report_pointer_emulation(data->input_dev, false);
+		input_sync(data->input_dev);
+	}
+
+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, size;
+	int ret;
+
+	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;
+
+		size = (object->size + 1) * (object->instances + 1);
+		if (index + size > pdata->config_length) {
+			dev_err(dev, "Not enough config data!\n");
+			return -EINVAL;
+		}
+
+		ret = __mxt_write_reg(data->client, object->start_address,
+				size, &pdata->config[index]);
+		if (ret)
+			return ret;
+		index += size;
+	}
+
+	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_T9, MXT_TOUCH_XSIZE,
+			pdata->x_line);
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_YSIZE,
+			pdata->y_line);
+
+	/* Set touchscreen orient */
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9, MXT_TOUCH_ORIENT,
+			pdata->orient);
+
+	/* Set touchscreen burst length */
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9,
+			MXT_TOUCH_BLEN, pdata->blen);
+
+	/* Set touchscreen threshold */
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9,
+			MXT_TOUCH_TCHTHR, pdata->threshold);
+
+	/* Set touchscreen resolution */
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9,
+			MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9,
+			MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9,
+			MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
+	mxt_write_object(data, MXT_TOUCH_MULTI_T9,
+			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_T28,
+				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;
+
+	/* Read 7-byte info block starting at address 0 */
+	error = __mxt_read_reg(client, MXT_INFO, sizeof(*info), info);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+static int mxt_get_object_table(struct mxt_data *data)
+{
+	struct i2c_client *client = data->client;
+	size_t table_size;
+	int error;
+	int i;
+	u8 reportid;
+
+	table_size = data->info.object_num * sizeof(struct mxt_object);
+	error = __mxt_read_reg(client, MXT_OBJECT_START, table_size,
+			data->object_table);
+	if (error)
+		return error;
+
+	/* Valid Report IDs start counting from 1 */
+	reportid = 1;
+	for (i = 0; i < data->info.object_num; i++) {
+		struct mxt_object *object = data->object_table + i;
+		u8 min_id, max_id;
+
+		le16_to_cpus(&object->start_address);
+
+		if (object->num_report_ids) {
+			min_id = reportid;
+			reportid += object->num_report_ids *
+					(object->instances + 1);
+			max_id = reportid - 1;
+		} else {
+			min_id = 0;
+			max_id = 0;
+		}
+
+		dev_dbg(&data->client->dev,
+			"Type %2d Start %3d Size %3d Instances %2d ReportIDs %3u : %3u\n",
+			object->type, object->start_address, object->size + 1,
+			object->instances + 1, min_id, max_id);
+
+		switch (object->type) {
+		case MXT_GEN_COMMAND_T6:
+			data->T6_reportid = min_id;
+			break;
+		case MXT_TOUCH_MULTI_T9:
+			data->T9_reportid_min = min_id;
+			data->T9_reportid_max = max_id;
+			break;
+		case MXT_SPT_GPIOPWM_T19:
+			data->T19_reportid = min_id;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static void mxt_free_object_table(struct mxt_data *data)
+{
+	kfree(data->object_table);
+	data->object_table = NULL;
+	data->T6_reportid = 0;
+	data->T9_reportid_min = 0;
+	data->T9_reportid_max = 0;
+	data->T19_reportid = 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)
+		goto err_free_object_table;
+
+	/* Check register init values */
+	error = mxt_check_reg_init(data);
+	if (error)
+		goto err_free_object_table;
+
+	mxt_handle_pdata(data);
+
+	/* Backup to memory */
+	mxt_write_object(data, MXT_GEN_COMMAND_T6,
+			MXT_COMMAND_BACKUPNV,
+			MXT_BACKUP_VALUE);
+	msleep(MXT_BACKUP_TIME);
+
+	/* Soft reset */
+	mxt_write_object(data, MXT_GEN_COMMAND_T6,
+			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)
+		goto err_free_object_table;
+	info->matrix_xsize = val;
+
+	error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
+	if (error)
+		goto err_free_object_table;
+	info->matrix_ysize = val;
+
+	dev_info(&client->dev,
+			"Family ID: %u Variant ID: %u Major.Minor.Build: %u.%u.%02X\n",
+			info->family_id, info->variant_id, info->version >> 4,
+			info->version & 0xf, info->build);
+
+	dev_info(&client->dev,
+			"Matrix X Size: %u Matrix Y Size: %u Object Num: %u\n",
+			info->matrix_xsize, info->matrix_ysize,
+			info->object_num);
+
+	return 0;
+
+err_free_object_table:
+	mxt_free_object_table(data);
+	return error;
+}
+
+static void mxt_calc_resolution(struct mxt_data *data)
+{
+	unsigned int max_x = data->pdata->x_size - 1;
+	unsigned int max_y = data->pdata->y_size - 1;
+
+	if (data->pdata->orient & MXT_XY_SWITCH) {
+		data->max_x = max_y;
+		data->max_y = max_x;
+	} else {
+		data->max_x = max_x;
+		data->max_y = max_y;
+	}
+}
+
+/* Firmware Version is returned as Major.Minor.Build */
+static ssize_t mxt_fw_version_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct mxt_data *data = dev_get_drvdata(dev);
+	struct mxt_info *info = &data->info;
+	return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n",
+			 info->version >> 4, info->version & 0xf, info->build);
+}
+
+/* Hardware Version is returned as FamilyID.VariantID */
+static ssize_t mxt_hw_version_show(struct device *dev,
+				   struct device_attribute *attr, char *buf)
+{
+	struct mxt_data *data = dev_get_drvdata(dev);
+	struct mxt_info *info = &data->info;
+	return scnprintf(buf, PAGE_SIZE, "%u.%u\n",
+			 info->family_id, info->variant_id);
+}
+
+static ssize_t mxt_show_instance(char *buf, int count,
+				 struct mxt_object *object, int instance,
+				 const u8 *val)
+{
+	int i;
+
+	if (object->instances > 0)
+		count += scnprintf(buf + count, PAGE_SIZE - count,
+				   "Instance %u\n", instance);
+
+	for (i = 0; i < object->size + 1; i++)
+		count += scnprintf(buf + count, PAGE_SIZE - count,
+				"\t[%2u]: %02x (%d)\n", i, val[i], val[i]);
+	count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
+
+	return count;
+}
+
+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 *obuf;
+
+	/* Pre-allocate buffer large enough to hold max sized object. */
+	obuf = kmalloc(256, GFP_KERNEL);
+	if (!obuf)
+		return -ENOMEM;
+
+	error = 0;
+	for (i = 0; i < data->info.object_num; i++) {
+		object = data->object_table + i;
+
+		if (!mxt_object_readable(object->type))
+			continue;
+
+		count += scnprintf(buf + count, PAGE_SIZE - count,
+				"T%u:\n", object->type);
+
+		for (j = 0; j < object->instances + 1; j++) {
+			u16 size = object->size + 1;
+			u16 addr = object->start_address + j * size;
+
+			error = __mxt_read_reg(data->client, addr, size, obuf);
+			if (error)
+				goto done;
+
+			count = mxt_show_instance(buf, count, object, j, obuf);
+		}
+	}
+
+done:
+	kfree(obuf);
+	return error ?: 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_T6,
+			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);
+
+		mxt_free_object_table(data);
+
+		mxt_initialize(data);
+	}
+
+	enable_irq(data->irq);
+
+	error = mxt_make_highchg(data);
+	if (error)
+		return error;
+
+	return count;
+}
+
+static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL);
+static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL);
+static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL);
+static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store);
+
+static struct attribute *mxt_attrs[] = {
+	&dev_attr_fw_version.attr,
+	&dev_attr_hw_version.attr,
+	&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_T9, MXT_TOUCH_CTRL, 0x83);
+}
+
+static void mxt_stop(struct mxt_data *data)
+{
+	/* Touch disable */
+	mxt_write_object(data,
+			MXT_TOUCH_MULTI_T9, 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 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;
+	unsigned int num_mt_slots;
+
+	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;
+	}
+
+	data->is_tp = pdata && pdata->is_tp;
+
+	input_dev->name = (data->is_tp) ? "Atmel maXTouch Touchpad" :
+					  "Atmel maXTouch Touchscreen";
+	snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0",
+		 client->adapter->nr, client->addr);
+
+	input_dev->phys = data->phys;
+
+	input_dev->id.bustype = BUS_I2C;
+	input_dev->dev.parent = &client->dev;
+	input_dev->open = mxt_input_open;
+	input_dev->close = mxt_input_close;
+
+	data->client = client;
+	data->input_dev = input_dev;
+	data->pdata = pdata;
+	data->irq = client->irq;
+
+	mxt_calc_resolution(data);
+
+	error = mxt_initialize(data);
+	if (error)
+		goto err_free_mem;
+
+	__set_bit(EV_ABS, input_dev->evbit);
+	__set_bit(EV_KEY, input_dev->evbit);
+	__set_bit(BTN_TOUCH, input_dev->keybit);
+
+	if (data->is_tp) {
+		int i;
+		__set_bit(INPUT_PROP_POINTER, input_dev->propbit);
+		__set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit);
+
+		for (i = 0; i < MXT_NUM_GPIO; i++)
+			if (pdata->key_map[i] != KEY_RESERVED)
+				__set_bit(pdata->key_map[i], input_dev->keybit);
+
+		__set_bit(BTN_TOOL_FINGER, input_dev->keybit);
+		__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
+		__set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
+		__set_bit(BTN_TOOL_QUADTAP, input_dev->keybit);
+		__set_bit(BTN_TOOL_QUINTTAP, input_dev->keybit);
+
+		input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM);
+		input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM);
+		input_abs_set_res(input_dev, ABS_MT_POSITION_X,
+				  MXT_PIXELS_PER_MM);
+		input_abs_set_res(input_dev, ABS_MT_POSITION_Y,
+				  MXT_PIXELS_PER_MM);
+	}
+
+	/* For single touch */
+	input_set_abs_params(input_dev, ABS_X,
+			     0, data->max_x, 0, 0);
+	input_set_abs_params(input_dev, ABS_Y,
+			     0, data->max_y, 0, 0);
+	input_set_abs_params(input_dev, ABS_PRESSURE,
+			     0, 255, 0, 0);
+
+	/* For multi touch */
+	num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
+	error = input_mt_init_slots(input_dev, num_mt_slots, 0);
+	if (error)
+		goto err_free_object;
+	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, data->max_x, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
+			     0, data->max_y, 0, 0);
+	input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+			     0, 255, 0, 0);
+
+	input_set_drvdata(input_dev, data);
+	i2c_set_clientdata(client, data);
+
+	error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
+				     pdata->irqflags | IRQF_ONESHOT,
+				     client->name, data);
+	if (error) {
+		dev_err(&client->dev, "Failed to register interrupt\n");
+		goto err_free_object;
+	}
+
+	error = mxt_make_highchg(data);
+	if (error)
+		goto err_free_irq;
+
+	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 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_SLEEP
+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_T6,
+			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;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume);
+
+static const struct i2c_device_id mxt_id[] = {
+	{ "qt602240_ts", 0 },
+	{ "atmel_mxt_ts", 0 },
+	{ "atmel_mxt_tp", 0 },
+	{ "mXT224", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, mxt_id);
+
+static struct i2c_driver mxt_driver = {
+	.driver = {
+		.name	= "atmel_mxt_ts",
+		.owner	= THIS_MODULE,
+		.pm	= &mxt_pm_ops,
+	},
+	.probe		= mxt_probe,
+	.remove		= mxt_remove,
+	.id_table	= mxt_id,
+};
+
+module_i2c_driver(mxt_driver);
+
+/* Module information */
+MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
+MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
+MODULE_LICENSE("GPL");