atmel_mxt_ts.c 27.5 KB
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/*
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 * Atmel maXTouch Touchscreen driver
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 *
 * 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>
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#include <linux/i2c/atmel_mxt_ts.h>
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#include <linux/input/mt.h>
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#include <linux/interrupt.h>
#include <linux/slab.h>

/* Version */
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#define MXT_VER_20		20
#define MXT_VER_21		21
#define MXT_VER_22		22
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/* Slave addresses */
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#define MXT_APP_LOW		0x4a
#define MXT_APP_HIGH		0x4b
#define MXT_BOOT_LOW		0x24
#define MXT_BOOT_HIGH		0x25
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/* Firmware */
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#define MXT_FW_NAME		"maxtouch.fw"
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/* Registers */
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#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
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#define MXT_OBJECT_SIZE		6
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/* Object types */
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#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
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#define MXT_PROCI_GRIP		40
#define MXT_PROCI_PALM		41
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#define MXT_SPT_COMMSCONFIG	18
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#define MXT_SPT_GPIOPWM		19
#define MXT_SPT_SELFTEST	25
#define MXT_SPT_CTECONFIG	28
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#define MXT_SPT_USERDATA	38
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#define MXT_SPT_DIGITIZER	43
#define MXT_SPT_MESSAGECOUNT	44
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/* 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
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#define MXT_TOUCH_JUMPLIMIT	30
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/* 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
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#define MXT_CTE_VOLTAGE		5
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#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 */
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/* Command to unlock bootloader */
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#define MXT_UNLOCK_CMD_MSB	0xaa
#define MXT_UNLOCK_CMD_LSB	0xdc
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/* Bootloader mode status */
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#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
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/* Touch status */
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#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)
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/* Touch orient bits */
#define MXT_XY_SWITCH		(1 << 0)
#define MXT_X_INVERT		(1 << 1)
#define MXT_Y_INVERT		(1 << 2)

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/* Touchscreen absolute values */
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#define MXT_MAX_AREA		0xff
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#define MXT_MAX_FINGER		10
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209
struct mxt_info {
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	u8 family_id;
	u8 variant_id;
	u8 version;
	u8 build;
	u8 matrix_xsize;
	u8 matrix_ysize;
	u8 object_num;
};

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struct mxt_object {
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	u8 type;
	u16 start_address;
	u8 size;
	u8 instances;
	u8 num_report_ids;

	/* to map object and message */
	u8 max_reportid;
};

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struct mxt_message {
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	u8 reportid;
	u8 message[7];
	u8 checksum;
};

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struct mxt_finger {
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	int status;
	int x;
	int y;
	int area;
};

/* Each client has this additional data */
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struct mxt_data {
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	struct i2c_client *client;
	struct input_dev *input_dev;
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	const struct mxt_platform_data *pdata;
	struct mxt_object *object_table;
	struct mxt_info info;
	struct mxt_finger finger[MXT_MAX_FINGER];
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	unsigned int irq;
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	unsigned int max_x;
	unsigned int max_y;
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};

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static bool mxt_object_readable(unsigned int type)
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{
	switch (type) {
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	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:
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	case MXT_PROCI_GRIP:
	case MXT_PROCI_PALM:
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	case MXT_SPT_COMMSCONFIG:
	case MXT_SPT_GPIOPWM:
	case MXT_SPT_SELFTEST:
	case MXT_SPT_CTECONFIG:
	case MXT_SPT_USERDATA:
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		return true;
	default:
		return false;
	}
}

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static bool mxt_object_writable(unsigned int type)
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{
	switch (type) {
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	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:
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	case MXT_PROCI_GRIP:
	case MXT_PROCI_PALM:
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	case MXT_SPT_GPIOPWM:
	case MXT_SPT_SELFTEST:
	case MXT_SPT_CTECONFIG:
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		return true;
	default:
		return false;
	}
}

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static void mxt_dump_message(struct device *dev,
				  struct mxt_message *message)
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{
	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);
}

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static int mxt_check_bootloader(struct i2c_client *client,
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				     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) {
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	case MXT_WAITING_BOOTLOAD_CMD:
	case MXT_WAITING_FRAME_DATA:
		val &= ~MXT_BOOT_STATUS_MASK;
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		break;
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	case MXT_FRAME_CRC_PASS:
		if (val == MXT_FRAME_CRC_CHECK)
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			goto recheck;
		break;
	default:
		return -EINVAL;
	}

	if (val != state) {
		dev_err(&client->dev, "Unvalid bootloader mode state\n");
		return -EINVAL;
	}

	return 0;
}

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static int mxt_unlock_bootloader(struct i2c_client *client)
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{
	u8 buf[2];

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	buf[0] = MXT_UNLOCK_CMD_LSB;
	buf[1] = MXT_UNLOCK_CMD_MSB;
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	if (i2c_master_send(client, buf, 2) != 2) {
		dev_err(&client->dev, "%s: i2c send failed\n", __func__);
		return -EIO;
	}

	return 0;
}

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static int mxt_fw_write(struct i2c_client *client,
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			     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;
}

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static int __mxt_read_reg(struct i2c_client *client,
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			       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;
}

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static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
409
{
410
	return __mxt_read_reg(client, reg, 1, val);
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}

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static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
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{
	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;
}

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static int mxt_read_object_table(struct i2c_client *client,
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				      u16 reg, u8 *object_buf)
{
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	return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
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				   object_buf);
}

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static struct mxt_object *
mxt_get_object(struct mxt_data *data, u8 type)
438
{
439
	struct mxt_object *object;
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	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;
}

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static int mxt_read_message(struct mxt_data *data,
				 struct mxt_message *message)
454
{
455
	struct mxt_object *object;
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	u16 reg;

458
	object = mxt_get_object(data, MXT_GEN_MESSAGE);
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	if (!object)
		return -EINVAL;

	reg = object->start_address;
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	return __mxt_read_reg(data->client, reg,
			sizeof(struct mxt_message), message);
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}

467
static int mxt_read_object(struct mxt_data *data,
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				u8 type, u8 offset, u8 *val)
{
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	struct mxt_object *object;
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	u16 reg;

473
	object = mxt_get_object(data, type);
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	if (!object)
		return -EINVAL;

	reg = object->start_address;
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	return __mxt_read_reg(data->client, reg + offset, 1, val);
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}

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static int mxt_write_object(struct mxt_data *data,
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				 u8 type, u8 offset, u8 val)
{
484
	struct mxt_object *object;
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	u16 reg;

487
	object = mxt_get_object(data, type);
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	if (!object)
		return -EINVAL;

	reg = object->start_address;
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	return mxt_write_reg(data->client, reg + offset, val);
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}

495
static void mxt_input_report(struct mxt_data *data, int single_id)
496
{
497
	struct mxt_finger *finger = data->finger;
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	struct input_dev *input_dev = data->input_dev;
	int status = finger[single_id].status;
	int finger_num = 0;
	int id;

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	for (id = 0; id < MXT_MAX_FINGER; id++) {
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		if (!finger[id].status)
			continue;

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		input_mt_slot(input_dev, id);
		input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
				finger[id].status != MXT_RELEASE);
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511
		if (finger[id].status != MXT_RELEASE) {
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			finger_num++;
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			input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
					finger[id].area);
			input_report_abs(input_dev, ABS_MT_POSITION_X,
					finger[id].x);
			input_report_abs(input_dev, ABS_MT_POSITION_Y,
					finger[id].y);
		} else {
			finger[id].status = 0;
		}
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	}

	input_report_key(input_dev, BTN_TOUCH, finger_num > 0);

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	if (status != MXT_RELEASE) {
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		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);
}

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static void mxt_input_touchevent(struct mxt_data *data,
				      struct mxt_message *message, int id)
536
{
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	struct mxt_finger *finger = data->finger;
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	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 */
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	if (!(status & MXT_DETECT)) {
		if (status & MXT_RELEASE) {
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			dev_dbg(dev, "[%d] released\n", id);

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			finger[id].status = MXT_RELEASE;
			mxt_input_report(data, id);
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		}
		return;
	}

	/* Check only AMP detection */
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	if (!(status & (MXT_PRESS | MXT_MOVE)))
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		return;

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	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;

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	area = message->message[4];

	dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
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		status & MXT_MOVE ? "moved" : "pressed",
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		x, y, area);

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	finger[id].status = status & MXT_MOVE ?
				MXT_MOVE : MXT_PRESS;
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	finger[id].x = x;
	finger[id].y = y;
	finger[id].area = area;

578
	mxt_input_report(data, id);
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}

581
static irqreturn_t mxt_interrupt(int irq, void *dev_id)
582
{
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	struct mxt_data *data = dev_id;
	struct mxt_message message;
	struct mxt_object *object;
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	struct device *dev = &data->client->dev;
	int id;
	u8 reportid;
	u8 max_reportid;
	u8 min_reportid;

	do {
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		if (mxt_read_message(data, &message)) {
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			dev_err(dev, "Failed to read message\n");
			goto end;
		}

		reportid = message.reportid;

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		/* whether reportid is thing of MXT_TOUCH_MULTI */
		object = mxt_get_object(data, MXT_TOUCH_MULTI);
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		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)
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			mxt_input_touchevent(data, &message, id);
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		else
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			mxt_dump_message(dev, &message);
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	} while (reportid != 0xff);

end:
	return IRQ_HANDLED;
}

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static int mxt_check_reg_init(struct mxt_data *data)
620
{
621
	const struct mxt_platform_data *pdata = data->pdata;
622
	struct mxt_object *object;
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	struct device *dev = &data->client->dev;
	int index = 0;
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	int i, j, config_offset;
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	if (!pdata->config) {
		dev_dbg(dev, "No cfg data defined, skipping reg init\n");
		return 0;
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	}

	for (i = 0; i < data->info.object_num; i++) {
		object = data->object_table + i;

635
		if (!mxt_object_writable(object->type))
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			continue;

638 639 640 641 642 643
		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;
			}
644
			mxt_write_object(data, object->type, j,
645 646
					 pdata->config[config_offset]);
		}
647 648 649 650 651 652
		index += object->size + 1;
	}

	return 0;
}

653
static int mxt_make_highchg(struct mxt_data *data)
654 655
{
	struct device *dev = &data->client->dev;
656
	struct mxt_message message;
657 658 659 660 661
	int count = 10;
	int error;

	/* Read dummy message to make high CHG pin */
	do {
662
		error = mxt_read_message(data, &message);
663 664
		if (error)
			return error;
665
	} while (message.reportid != 0xff && --count);
666 667 668 669 670 671 672 673 674

	if (!count) {
		dev_err(dev, "CHG pin isn't cleared\n");
		return -EBUSY;
	}

	return 0;
}

675
static void mxt_handle_pdata(struct mxt_data *data)
676
{
677
	const struct mxt_platform_data *pdata = data->pdata;
678 679 680
	u8 voltage;

	/* Set touchscreen lines */
681
	mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
682
			pdata->x_line);
683
	mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
684 685 686
			pdata->y_line);

	/* Set touchscreen orient */
687
	mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
688 689 690
			pdata->orient);

	/* Set touchscreen burst length */
691 692
	mxt_write_object(data, MXT_TOUCH_MULTI,
			MXT_TOUCH_BLEN, pdata->blen);
693 694

	/* Set touchscreen threshold */
695 696
	mxt_write_object(data, MXT_TOUCH_MULTI,
			MXT_TOUCH_TCHTHR, pdata->threshold);
697 698

	/* Set touchscreen resolution */
699 700 701 702 703 704 705 706
	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);
707 708

	/* Set touchscreen voltage */
709
	if (pdata->voltage) {
710 711 712
		if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
			voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
				MXT_VOLTAGE_STEP;
713 714
			voltage = 0xff - voltage + 1;
		} else
715 716
			voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
				MXT_VOLTAGE_STEP;
717

718 719
		mxt_write_object(data, MXT_SPT_CTECONFIG,
				MXT_CTE_VOLTAGE, voltage);
720 721 722
	}
}

723
static int mxt_get_info(struct mxt_data *data)
724 725
{
	struct i2c_client *client = data->client;
726
	struct mxt_info *info = &data->info;
727 728 729
	int error;
	u8 val;

730
	error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
731 732 733 734
	if (error)
		return error;
	info->family_id = val;

735
	error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
736 737 738 739
	if (error)
		return error;
	info->variant_id = val;

740
	error = mxt_read_reg(client, MXT_VERSION, &val);
741 742 743 744
	if (error)
		return error;
	info->version = val;

745
	error = mxt_read_reg(client, MXT_BUILD, &val);
746 747 748 749
	if (error)
		return error;
	info->build = val;

750
	error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
751 752 753 754 755 756 757
	if (error)
		return error;
	info->object_num = val;

	return 0;
}

758
static int mxt_get_object_table(struct mxt_data *data)
759 760 761 762 763
{
	int error;
	int i;
	u16 reg;
	u8 reportid = 0;
764
	u8 buf[MXT_OBJECT_SIZE];
765 766

	for (i = 0; i < data->info.object_num; i++) {
767
		struct mxt_object *object = data->object_table + i;
768

769 770
		reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
		error = mxt_read_object_table(data->client, reg, buf);
771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789
		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;
}

790
static int mxt_initialize(struct mxt_data *data)
791 792
{
	struct i2c_client *client = data->client;
793
	struct mxt_info *info = &data->info;
794 795 796
	int error;
	u8 val;

797
	error = mxt_get_info(data);
798 799 800 801
	if (error)
		return error;

	data->object_table = kcalloc(info->object_num,
802
				     sizeof(struct mxt_object),
803 804 805 806 807 808 809
				     GFP_KERNEL);
	if (!data->object_table) {
		dev_err(&client->dev, "Failed to allocate memory\n");
		return -ENOMEM;
	}

	/* Get object table information */
810
	error = mxt_get_object_table(data);
811 812 813 814
	if (error)
		return error;

	/* Check register init values */
815
	error = mxt_check_reg_init(data);
816 817 818
	if (error)
		return error;

819
	mxt_handle_pdata(data);
820 821

	/* Backup to memory */
822 823 824 825
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_BACKUPNV,
			MXT_BACKUP_VALUE);
	msleep(MXT_BACKUP_TIME);
826 827

	/* Soft reset */
828 829 830
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_RESET, 1);
	msleep(MXT_RESET_TIME);
831 832

	/* Update matrix size at info struct */
833
	error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
834 835 836 837
	if (error)
		return error;
	info->matrix_xsize = val;

838
	error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855
	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;
}

856 857 858 859 860 861 862 863 864 865 866 867 868 869
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;
	}
}

870
static ssize_t mxt_object_show(struct device *dev,
871 872
				    struct device_attribute *attr, char *buf)
{
873 874
	struct mxt_data *data = dev_get_drvdata(dev);
	struct mxt_object *object;
875 876 877 878 879 880 881 882 883 884 885 886
	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);

887
		if (!mxt_object_readable(object->type)) {
888 889 890 891 892
			count += sprintf(buf + count, "\n");
			continue;
		}

		for (j = 0; j < object->size + 1; j++) {
893
			error = mxt_read_object(data,
894 895 896 897 898 899 900 901 902 903 904 905 906 907
						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;
}

908
static int mxt_load_fw(struct device *dev, const char *fn)
909
{
910
	struct mxt_data *data = dev_get_drvdata(dev);
911 912 913 914 915 916 917 918 919 920 921 922 923
	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 */
924 925 926
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_RESET, MXT_BOOT_VALUE);
	msleep(MXT_RESET_TIME);
927 928

	/* Change to slave address of bootloader */
929 930
	if (client->addr == MXT_APP_LOW)
		client->addr = MXT_BOOT_LOW;
931
	else
932
		client->addr = MXT_BOOT_HIGH;
933

934
	ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
935 936 937 938
	if (ret)
		goto out;

	/* Unlock bootloader */
939
	mxt_unlock_bootloader(client);
940 941

	while (pos < fw->size) {
942 943
		ret = mxt_check_bootloader(client,
						MXT_WAITING_FRAME_DATA);
944 945 946 947 948 949 950 951 952 953 954
		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 */
955
		mxt_fw_write(client, fw->data + pos, frame_size);
956

957 958
		ret = mxt_check_bootloader(client,
						MXT_FRAME_CRC_PASS);
959 960 961 962 963 964 965 966 967 968 969 970
		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 */
971 972
	if (client->addr == MXT_BOOT_LOW)
		client->addr = MXT_APP_LOW;
973
	else
974
		client->addr = MXT_APP_HIGH;
975 976 977 978

	return ret;
}

979
static ssize_t mxt_update_fw_store(struct device *dev,
980 981 982
					struct device_attribute *attr,
					const char *buf, size_t count)
{
983
	struct mxt_data *data = dev_get_drvdata(dev);
984 985 986 987
	int error;

	disable_irq(data->irq);

988
	error = mxt_load_fw(dev, MXT_FW_NAME);
989 990 991 992 993 994 995
	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 */
996
		msleep(MXT_FWRESET_TIME);
997 998 999 1000

		kfree(data->object_table);
		data->object_table = NULL;

1001
		mxt_initialize(data);
1002 1003 1004 1005
	}

	enable_irq(data->irq);

1006 1007 1008 1009
	error = mxt_make_highchg(data);
	if (error)
		return error;

1010 1011 1012
	return count;
}

1013 1014
static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
1015

1016
static struct attribute *mxt_attrs[] = {
1017 1018 1019 1020 1021
	&dev_attr_object.attr,
	&dev_attr_update_fw.attr,
	NULL
};

1022 1023
static const struct attribute_group mxt_attr_group = {
	.attrs = mxt_attrs,
1024 1025
};

1026
static void mxt_start(struct mxt_data *data)
1027 1028
{
	/* Touch enable */
1029 1030
	mxt_write_object(data,
			MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
1031 1032
}

1033
static void mxt_stop(struct mxt_data *data)
1034 1035
{
	/* Touch disable */
1036 1037
	mxt_write_object(data,
			MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
1038 1039
}

1040
static int mxt_input_open(struct input_dev *dev)
1041
{
1042
	struct mxt_data *data = input_get_drvdata(dev);
1043

1044
	mxt_start(data);
1045 1046 1047 1048

	return 0;
}

1049
static void mxt_input_close(struct input_dev *dev)
1050
{
1051
	struct mxt_data *data = input_get_drvdata(dev);
1052

1053
	mxt_stop(data);
1054 1055
}

1056
static int __devinit mxt_probe(struct i2c_client *client,
1057 1058
		const struct i2c_device_id *id)
{
1059
	const struct mxt_platform_data *pdata = client->dev.platform_data;
1060
	struct mxt_data *data;
1061 1062 1063
	struct input_dev *input_dev;
	int error;

1064
	if (!pdata)
1065 1066
		return -EINVAL;

1067
	data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1068 1069 1070 1071 1072 1073 1074
	input_dev = input_allocate_device();
	if (!data || !input_dev) {
		dev_err(&client->dev, "Failed to allocate memory\n");
		error = -ENOMEM;
		goto err_free_mem;
	}

1075
	input_dev->name = "Atmel maXTouch Touchscreen";
1076 1077
	input_dev->id.bustype = BUS_I2C;
	input_dev->dev.parent = &client->dev;
1078 1079
	input_dev->open = mxt_input_open;
	input_dev->close = mxt_input_close;
1080

1081 1082 1083 1084 1085 1086 1087
	data->client = client;
	data->input_dev = input_dev;
	data->pdata = pdata;
	data->irq = client->irq;

	mxt_calc_resolution(data);

1088 1089 1090 1091 1092 1093
	__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,
1094
			     0, data->max_x, 0, 0);
1095
	input_set_abs_params(input_dev, ABS_Y,
1096
			     0, data->max_y, 0, 0);
1097 1098

	/* For multi touch */
1099
	input_mt_init_slots(input_dev, MXT_MAX_FINGER);
1100
	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1101
			     0, MXT_MAX_AREA, 0, 0);
1102
	input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1103
			     0, data->max_x, 0, 0);
1104
	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1105
			     0, data->max_y, 0, 0);
1106 1107 1108 1109

	input_set_drvdata(input_dev, data);
	i2c_set_clientdata(client, data);

1110
	error = mxt_initialize(data);
1111 1112 1113
	if (error)
		goto err_free_object;

1114
	error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1115
			pdata->irqflags, client->dev.driver->name, data);
1116 1117 1118 1119 1120
	if (error) {
		dev_err(&client->dev, "Failed to register interrupt\n");
		goto err_free_object;
	}

1121 1122 1123 1124
	error = mxt_make_highchg(data);
	if (error)
		goto err_free_irq;

1125 1126 1127 1128
	error = input_register_device(input_dev);
	if (error)
		goto err_free_irq;

1129
	error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147
	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;
}

1148
static int __devexit mxt_remove(struct i2c_client *client)
1149
{
1150
	struct mxt_data *data = i2c_get_clientdata(client);
1151

1152
	sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1153 1154 1155 1156 1157 1158 1159 1160 1161
	free_irq(data->irq, data);
	input_unregister_device(data->input_dev);
	kfree(data->object_table);
	kfree(data);

	return 0;
}

#ifdef CONFIG_PM
1162
static int mxt_suspend(struct device *dev)
1163
{
1164
	struct i2c_client *client = to_i2c_client(dev);
1165
	struct mxt_data *data = i2c_get_clientdata(client);
1166 1167 1168 1169 1170
	struct input_dev *input_dev = data->input_dev;

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
1171
		mxt_stop(data);
1172 1173 1174 1175 1176 1177

	mutex_unlock(&input_dev->mutex);

	return 0;
}

1178
static int mxt_resume(struct device *dev)
1179
{
1180
	struct i2c_client *client = to_i2c_client(dev);
1181
	struct mxt_data *data = i2c_get_clientdata(client);
1182 1183 1184
	struct input_dev *input_dev = data->input_dev;

	/* Soft reset */
1185 1186
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_RESET, 1);
1187

1188
	msleep(MXT_RESET_TIME);
1189 1190 1191 1192

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
1193
		mxt_start(data);
1194 1195 1196 1197 1198

	mutex_unlock(&input_dev->mutex);

	return 0;
}
1199

1200 1201 1202
static const struct dev_pm_ops mxt_pm_ops = {
	.suspend	= mxt_suspend,
	.resume		= mxt_resume,
1203
};
1204 1205
#endif

1206
static const struct i2c_device_id mxt_id[] = {
1207
	{ "qt602240_ts", 0 },
1208
	{ "atmel_mxt_ts", 0 },
1209
	{ "mXT224", 0 },
1210 1211
	{ }
};
1212
MODULE_DEVICE_TABLE(i2c, mxt_id);
1213

1214
static struct i2c_driver mxt_driver = {
1215
	.driver = {
1216
		.name	= "atmel_mxt_ts",
1217
		.owner	= THIS_MODULE,
1218
#ifdef CONFIG_PM
1219
		.pm	= &mxt_pm_ops,
1220
#endif
1221
	},
1222 1223 1224
	.probe		= mxt_probe,
	.remove		= __devexit_p(mxt_remove),
	.id_table	= mxt_id,
1225 1226
};

1227
static int __init mxt_init(void)
1228
{
1229
	return i2c_add_driver(&mxt_driver);
1230 1231
}

1232
static void __exit mxt_exit(void)
1233
{
1234
	i2c_del_driver(&mxt_driver);
1235 1236
}

1237 1238
module_init(mxt_init);
module_exit(mxt_exit);
1239 1240 1241

/* Module information */
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1242
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1243
MODULE_LICENSE("GPL");