atmel_mxt_ts.c 32.6 KB
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1
/*
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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.h>
#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"
37 38

/* 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
49 50

/* 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
#define MXT_SPT_COMMSCONFIG	18	/* firmware ver 21 over */
#define MXT_SPT_GPIOPWM		19
#define MXT_SPT_SELFTEST	25
#define MXT_SPT_CTECONFIG	28
#define MXT_SPT_USERDATA	38	/* firmware ver 21 over */

/* 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	/* firmware ver 22 over */

/* 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	/* firmware ver 21 over */

#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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/* Touchscreen absolute values */
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#define MXT_MAX_XC		0x3ff
#define MXT_MAX_YC		0x3ff
#define MXT_MAX_AREA		0xff
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#define MXT_MAX_FINGER		10
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/* Initial register values recommended from chip vendor */
static const u8 init_vals_ver_20[] = {
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	/* MXT_GEN_COMMAND(6) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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	/* MXT_GEN_POWER(7) */
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	0x20, 0xff, 0x32,
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	/* MXT_GEN_ACQUIRE(8) */
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	0x08, 0x05, 0x05, 0x00, 0x00, 0x00, 0x05, 0x14,
210
	/* MXT_TOUCH_MULTI(9) */
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	0x00, 0x00, 0x00, 0x11, 0x0a, 0x00, 0x00, 0x00, 0x02, 0x00,
	0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x64,
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	/* MXT_TOUCH_KEYARRAY(15) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00,
217
	/* MXT_SPT_GPIOPWM(19) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00,
220
	/* MXT_PROCI_GRIPFACE(20) */
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	0x00, 0x64, 0x64, 0x64, 0x64, 0x00, 0x00, 0x1e, 0x14, 0x04,
	0x1e, 0x00,
223
	/* MXT_PROCG_NOISE(22) */
224 225
	0x05, 0x00, 0x00, 0x19, 0x00, 0xe7, 0xff, 0x04, 0x32, 0x00,
	0x01, 0x0a, 0x0f, 0x14, 0x00, 0x00, 0xe8,
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	/* MXT_TOUCH_PROXIMITY(23) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00,
229
	/* MXT_PROCI_ONETOUCH(24) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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	/* MXT_SPT_SELFTEST(25) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
235
	/* MXT_PROCI_TWOTOUCH(27) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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	/* MXT_SPT_CTECONFIG(28) */
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	0x00, 0x00, 0x00, 0x04, 0x08,
};

static const u8 init_vals_ver_21[] = {
242
	/* MXT_GEN_COMMAND(6) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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	/* MXT_GEN_POWER(7) */
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	0x20, 0xff, 0x32,
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	/* MXT_GEN_ACQUIRE(8) */
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	0x0a, 0x00, 0x05, 0x00, 0x00, 0x00, 0x09, 0x23,
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	/* MXT_TOUCH_MULTI(9) */
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	0x00, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x00, 0x02, 0x00,
	0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
252
	/* MXT_TOUCH_KEYARRAY(15) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00,
255
	/* MXT_SPT_GPIOPWM(19) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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	/* MXT_PROCI_GRIPFACE(20) */
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	0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x28, 0x04,
	0x0f, 0x0a,
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	/* MXT_PROCG_NOISE(22) */
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	0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00,
	0x00, 0x05, 0x0f, 0x19, 0x23, 0x2d, 0x03,
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	/* MXT_TOUCH_PROXIMITY(23) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00,
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	/* MXT_PROCI_ONETOUCH(24) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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	/* MXT_SPT_SELFTEST(25) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
273
	/* MXT_PROCI_TWOTOUCH(27) */
274
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
275
	/* MXT_SPT_CTECONFIG(28) */
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	0x00, 0x00, 0x00, 0x08, 0x10, 0x00,
};

static const u8 init_vals_ver_22[] = {
280
	/* MXT_GEN_COMMAND(6) */
281
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
282
	/* MXT_GEN_POWER(7) */
283
	0x20, 0xff, 0x32,
284
	/* MXT_GEN_ACQUIRE(8) */
285
	0x0a, 0x00, 0x05, 0x00, 0x00, 0x00, 0x09, 0x23,
286
	/* MXT_TOUCH_MULTI(9) */
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	0x00, 0x00, 0x00, 0x13, 0x0b, 0x00, 0x00, 0x00, 0x02, 0x00,
	0x00, 0x01, 0x01, 0x0e, 0x0a, 0x0a, 0x0a, 0x0a, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00,
291
	/* MXT_TOUCH_KEYARRAY(15) */
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	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00,
294
	/* MXT_SPT_GPIOPWM(19) */
295 296
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
297
	/* MXT_PROCI_GRIPFACE(20) */
298 299
	0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x50, 0x28, 0x04,
	0x0f, 0x0a,
300
	/* MXT_PROCG_NOISE(22) */
301 302
	0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x23, 0x00,
	0x00, 0x05, 0x0f, 0x19, 0x23, 0x2d, 0x03,
303
	/* MXT_TOUCH_PROXIMITY(23) */
304 305
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00,
306
	/* MXT_PROCI_ONETOUCH(24) */
307 308
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
309
	/* MXT_SPT_SELFTEST(25) */
310 311
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00,
312
	/* MXT_PROCI_TWOTOUCH(27) */
313
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
314
	/* MXT_SPT_CTECONFIG(28) */
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	0x00, 0x00, 0x00, 0x08, 0x10, 0x00,
};

318
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;
};

328
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;
};

339
struct mxt_message {
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	u8 reportid;
	u8 message[7];
	u8 checksum;
};

345
struct mxt_finger {
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	int status;
	int x;
	int y;
	int area;
};

/* Each client has this additional data */
353
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;
};

363
static bool mxt_object_readable(unsigned int type)
364 365
{
	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:
	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;
	}
}

388
static bool mxt_object_writable(unsigned int type)
389 390
{
	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:
	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);
}

424
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;
439
		break;
440 441
	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;
}

456
static int mxt_unlock_bootloader(struct i2c_client *client)
457 458 459
{
	u8 buf[2];

460 461
	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;
}

471
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;
}

482
static int __mxt_read_reg(struct i2c_client *client,
483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510
			       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;
}

511
static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
512
{
513
	return __mxt_read_reg(client, reg, 1, val);
514 515
}

516
static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val)
517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
{
	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;
}

532
static int mxt_read_object_table(struct i2c_client *client,
533 534
				      u16 reg, u8 *object_buf)
{
535
	return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
536 537 538
				   object_buf);
}

539 540
static struct mxt_object *
mxt_get_object(struct mxt_data *data, u8 type)
541
{
542
	struct mxt_object *object;
543 544 545 546 547 548 549 550 551 552 553 554
	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;
}

555 556
static int mxt_read_message(struct mxt_data *data,
				 struct mxt_message *message)
557
{
558
	struct mxt_object *object;
559 560
	u16 reg;

561
	object = mxt_get_object(data, MXT_GEN_MESSAGE);
562 563 564 565
	if (!object)
		return -EINVAL;

	reg = object->start_address;
566 567
	return __mxt_read_reg(data->client, reg,
			sizeof(struct mxt_message), message);
568 569
}

570
static int mxt_read_object(struct mxt_data *data,
571 572
				u8 type, u8 offset, u8 *val)
{
573
	struct mxt_object *object;
574 575
	u16 reg;

576
	object = mxt_get_object(data, type);
577 578 579 580
	if (!object)
		return -EINVAL;

	reg = object->start_address;
581
	return __mxt_read_reg(data->client, reg + offset, 1, val);
582 583
}

584
static int mxt_write_object(struct mxt_data *data,
585 586
				 u8 type, u8 offset, u8 val)
{
587
	struct mxt_object *object;
588 589
	u16 reg;

590
	object = mxt_get_object(data, type);
591 592 593 594
	if (!object)
		return -EINVAL;

	reg = object->start_address;
595
	return mxt_write_reg(data->client, reg + offset, val);
596 597
}

598
static void mxt_input_report(struct mxt_data *data, int single_id)
599
{
600
	struct mxt_finger *finger = data->finger;
601 602 603 604 605
	struct input_dev *input_dev = data->input_dev;
	int status = finger[single_id].status;
	int finger_num = 0;
	int id;

606
	for (id = 0; id < MXT_MAX_FINGER; id++) {
607 608 609 610
		if (!finger[id].status)
			continue;

		input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
611
				finger[id].status != MXT_RELEASE ?
612 613 614 615 616 617 618
				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);

619
		if (finger[id].status == MXT_RELEASE)
620 621 622 623 624 625 626
			finger[id].status = 0;
		else
			finger_num++;
	}

	input_report_key(input_dev, BTN_TOUCH, finger_num > 0);

627
	if (status != MXT_RELEASE) {
628 629 630 631 632 633 634
		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);
}

635 636
static void mxt_input_touchevent(struct mxt_data *data,
				      struct mxt_message *message, int id)
637
{
638
	struct mxt_finger *finger = data->finger;
639 640 641 642 643 644 645
	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 */
646 647
	if (!(status & MXT_DETECT)) {
		if (status & MXT_RELEASE) {
648 649
			dev_dbg(dev, "[%d] released\n", id);

650 651
			finger[id].status = MXT_RELEASE;
			mxt_input_report(data, id);
652 653 654 655 656
		}
		return;
	}

	/* Check only AMP detection */
657
	if (!(status & (MXT_PRESS | MXT_MOVE)))
658 659 660 661 662 663 664
		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,
665
		status & MXT_MOVE ? "moved" : "pressed",
666 667
		x, y, area);

668 669
	finger[id].status = status & MXT_MOVE ?
				MXT_MOVE : MXT_PRESS;
670 671 672 673
	finger[id].x = x;
	finger[id].y = y;
	finger[id].area = area;

674
	mxt_input_report(data, id);
675 676
}

677
static irqreturn_t mxt_interrupt(int irq, void *dev_id)
678
{
679 680 681
	struct mxt_data *data = dev_id;
	struct mxt_message message;
	struct mxt_object *object;
682 683 684 685 686 687 688
	struct device *dev = &data->client->dev;
	int id;
	u8 reportid;
	u8 max_reportid;
	u8 min_reportid;

	do {
689
		if (mxt_read_message(data, &message)) {
690 691 692 693 694 695
			dev_err(dev, "Failed to read message\n");
			goto end;
		}

		reportid = message.reportid;

696 697
		/* whether reportid is thing of MXT_TOUCH_MULTI */
		object = mxt_get_object(data, MXT_TOUCH_MULTI);
698 699 700 701 702 703 704 705
		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)
706
			mxt_input_touchevent(data, &message, id);
707
		else
708
			mxt_dump_message(dev, &message);
709 710 711 712 713 714
	} while (reportid != 0xff);

end:
	return IRQ_HANDLED;
}

715
static int mxt_check_reg_init(struct mxt_data *data)
716
{
717
	struct mxt_object *object;
718 719 720 721 722 723 724
	struct device *dev = &data->client->dev;
	int index = 0;
	int i, j;
	u8 version = data->info.version;
	u8 *init_vals;

	switch (version) {
725
	case MXT_VER_20:
726 727
		init_vals = (u8 *)init_vals_ver_20;
		break;
728
	case MXT_VER_21:
729 730
		init_vals = (u8 *)init_vals_ver_21;
		break;
731
	case MXT_VER_22:
732 733 734 735 736 737 738 739 740 741
		init_vals = (u8 *)init_vals_ver_22;
		break;
	default:
		dev_err(dev, "Firmware version %d doesn't support\n", version);
		return -EINVAL;
	}

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

742
		if (!mxt_object_writable(object->type))
743 744 745
			continue;

		for (j = 0; j < object->size + 1; j++)
746
			mxt_write_object(data, object->type, j,
747 748 749 750 751 752 753 754
					init_vals[index + j]);

		index += object->size + 1;
	}

	return 0;
}

755
static int mxt_check_matrix_size(struct mxt_data *data)
756
{
757
	const struct mxt_platform_data *pdata = data->pdata;
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803
	struct device *dev = &data->client->dev;
	int mode = -1;
	int error;
	u8 val;

	dev_dbg(dev, "Number of X lines: %d\n", pdata->x_line);
	dev_dbg(dev, "Number of Y lines: %d\n", pdata->y_line);

	switch (pdata->x_line) {
	case 0 ... 15:
		if (pdata->y_line <= 14)
			mode = 0;
		break;
	case 16:
		if (pdata->y_line <= 12)
			mode = 1;
		if (pdata->y_line == 13 || pdata->y_line == 14)
			mode = 0;
		break;
	case 17:
		if (pdata->y_line <= 11)
			mode = 2;
		if (pdata->y_line == 12 || pdata->y_line == 13)
			mode = 1;
		break;
	case 18:
		if (pdata->y_line <= 10)
			mode = 3;
		if (pdata->y_line == 11 || pdata->y_line == 12)
			mode = 2;
		break;
	case 19:
		if (pdata->y_line <= 9)
			mode = 4;
		if (pdata->y_line == 10 || pdata->y_line == 11)
			mode = 3;
		break;
	case 20:
		mode = 4;
	}

	if (mode < 0) {
		dev_err(dev, "Invalid X/Y lines\n");
		return -EINVAL;
	}

804 805
	error = mxt_read_object(data, MXT_SPT_CTECONFIG,
				MXT_CTE_MODE, &val);
806 807 808 809 810 811 812
	if (error)
		return error;

	if (mode == val)
		return 0;

	/* Change the CTE configuration */
813 814 815 816 817 818
	mxt_write_object(data, MXT_SPT_CTECONFIG,
			MXT_CTE_CTRL, 1);
	mxt_write_object(data, MXT_SPT_CTECONFIG,
			MXT_CTE_MODE, mode);
	mxt_write_object(data, MXT_SPT_CTECONFIG,
			MXT_CTE_CTRL, 0);
819 820 821 822

	return 0;
}

823
static int mxt_make_highchg(struct mxt_data *data)
824 825
{
	struct device *dev = &data->client->dev;
826
	struct mxt_message message;
827 828 829 830 831
	int count = 10;
	int error;

	/* Read dummy message to make high CHG pin */
	do {
832
		error = mxt_read_message(data, &message);
833 834
		if (error)
			return error;
835
	} while (message.reportid != 0xff && --count);
836 837 838 839 840 841 842 843 844

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

	return 0;
}

845
static void mxt_handle_pdata(struct mxt_data *data)
846
{
847
	const struct mxt_platform_data *pdata = data->pdata;
848 849 850
	u8 voltage;

	/* Set touchscreen lines */
851
	mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
852
			pdata->x_line);
853
	mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
854 855 856
			pdata->y_line);

	/* Set touchscreen orient */
857
	mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
858 859 860
			pdata->orient);

	/* Set touchscreen burst length */
861 862
	mxt_write_object(data, MXT_TOUCH_MULTI,
			MXT_TOUCH_BLEN, pdata->blen);
863 864

	/* Set touchscreen threshold */
865 866
	mxt_write_object(data, MXT_TOUCH_MULTI,
			MXT_TOUCH_TCHTHR, pdata->threshold);
867 868

	/* Set touchscreen resolution */
869 870 871 872 873 874 875 876
	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);
877 878

	/* Set touchscreen voltage */
879 880 881 882
	if (data->info.version >= MXT_VER_21 && pdata->voltage) {
		if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
			voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
				MXT_VOLTAGE_STEP;
883 884
			voltage = 0xff - voltage + 1;
		} else
885 886
			voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
				MXT_VOLTAGE_STEP;
887

888 889
		mxt_write_object(data, MXT_SPT_CTECONFIG,
				MXT_CTE_VOLTAGE, voltage);
890 891 892
	}
}

893
static int mxt_get_info(struct mxt_data *data)
894 895
{
	struct i2c_client *client = data->client;
896
	struct mxt_info *info = &data->info;
897 898 899
	int error;
	u8 val;

900
	error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
901 902 903 904
	if (error)
		return error;
	info->family_id = val;

905
	error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
906 907 908 909
	if (error)
		return error;
	info->variant_id = val;

910
	error = mxt_read_reg(client, MXT_VERSION, &val);
911 912 913 914
	if (error)
		return error;
	info->version = val;

915
	error = mxt_read_reg(client, MXT_BUILD, &val);
916 917 918 919
	if (error)
		return error;
	info->build = val;

920
	error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
921 922 923 924 925 926 927
	if (error)
		return error;
	info->object_num = val;

	return 0;
}

928
static int mxt_get_object_table(struct mxt_data *data)
929 930 931 932 933
{
	int error;
	int i;
	u16 reg;
	u8 reportid = 0;
934
	u8 buf[MXT_OBJECT_SIZE];
935 936

	for (i = 0; i < data->info.object_num; i++) {
937
		struct mxt_object *object = data->object_table + i;
938

939 940
		reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
		error = mxt_read_object_table(data->client, reg, buf);
941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959
		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;
}

960
static int mxt_initialize(struct mxt_data *data)
961 962
{
	struct i2c_client *client = data->client;
963
	struct mxt_info *info = &data->info;
964 965 966
	int error;
	u8 val;

967
	error = mxt_get_info(data);
968 969 970 971
	if (error)
		return error;

	data->object_table = kcalloc(info->object_num,
972
				     sizeof(struct mxt_object),
973 974 975 976 977 978 979
				     GFP_KERNEL);
	if (!data->object_table) {
		dev_err(&client->dev, "Failed to allocate memory\n");
		return -ENOMEM;
	}

	/* Get object table information */
980
	error = mxt_get_object_table(data);
981 982 983 984
	if (error)
		return error;

	/* Check register init values */
985
	error = mxt_check_reg_init(data);
986 987 988 989
	if (error)
		return error;

	/* Check X/Y matrix size */
990
	error = mxt_check_matrix_size(data);
991 992 993
	if (error)
		return error;

994
	error = mxt_make_highchg(data);
995 996 997
	if (error)
		return error;

998
	mxt_handle_pdata(data);
999 1000

	/* Backup to memory */
1001 1002 1003 1004
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_BACKUPNV,
			MXT_BACKUP_VALUE);
	msleep(MXT_BACKUP_TIME);
1005 1006

	/* Soft reset */
1007 1008 1009
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_RESET, 1);
	msleep(MXT_RESET_TIME);
1010 1011

	/* Update matrix size at info struct */
1012
	error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
1013 1014 1015 1016
	if (error)
		return error;
	info->matrix_xsize = val;

1017
	error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
	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;
}

1035
static ssize_t mxt_object_show(struct device *dev,
1036 1037
				    struct device_attribute *attr, char *buf)
{
1038 1039
	struct mxt_data *data = dev_get_drvdata(dev);
	struct mxt_object *object;
1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051
	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);

1052
		if (!mxt_object_readable(object->type)) {
1053 1054 1055 1056 1057
			count += sprintf(buf + count, "\n");
			continue;
		}

		for (j = 0; j < object->size + 1; j++) {
1058
			error = mxt_read_object(data,
1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072
						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;
}

1073
static int mxt_load_fw(struct device *dev, const char *fn)
1074
{
1075
	struct mxt_data *data = dev_get_drvdata(dev);
1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088
	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 */
1089 1090 1091
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_RESET, MXT_BOOT_VALUE);
	msleep(MXT_RESET_TIME);
1092 1093

	/* Change to slave address of bootloader */
1094 1095
	if (client->addr == MXT_APP_LOW)
		client->addr = MXT_BOOT_LOW;
1096
	else
1097
		client->addr = MXT_BOOT_HIGH;
1098

1099
	ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
1100 1101 1102 1103
	if (ret)
		goto out;

	/* Unlock bootloader */
1104
	mxt_unlock_bootloader(client);
1105 1106

	while (pos < fw->size) {
1107 1108
		ret = mxt_check_bootloader(client,
						MXT_WAITING_FRAME_DATA);
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
		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 */
1120
		mxt_fw_write(client, fw->data + pos, frame_size);
1121

1122 1123
		ret = mxt_check_bootloader(client,
						MXT_FRAME_CRC_PASS);
1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135
		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 */
1136 1137
	if (client->addr == MXT_BOOT_LOW)
		client->addr = MXT_APP_LOW;
1138
	else
1139
		client->addr = MXT_APP_HIGH;
1140 1141 1142 1143

	return ret;
}

1144
static ssize_t mxt_update_fw_store(struct device *dev,
1145 1146 1147
					struct device_attribute *attr,
					const char *buf, size_t count)
{
1148
	struct mxt_data *data = dev_get_drvdata(dev);
1149 1150 1151 1152 1153 1154 1155 1156
	unsigned int version;
	int error;

	if (sscanf(buf, "%u", &version) != 1) {
		dev_err(dev, "Invalid values\n");
		return -EINVAL;
	}

1157
	if (data->info.version < MXT_VER_21 || version < MXT_VER_21) {
1158 1159 1160 1161 1162 1163
		dev_err(dev, "FW update supported starting with version 21\n");
		return -EINVAL;
	}

	disable_irq(data->irq);

1164
	error = mxt_load_fw(dev, MXT_FW_NAME);
1165 1166 1167 1168 1169 1170 1171
	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 */
1172
		msleep(MXT_FWRESET_TIME);
1173 1174 1175 1176

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

1177
		mxt_initialize(data);
1178 1179 1180 1181 1182 1183 1184
	}

	enable_irq(data->irq);

	return count;
}

1185 1186
static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
1187

1188
static struct attribute *mxt_attrs[] = {
1189 1190 1191 1192 1193
	&dev_attr_object.attr,
	&dev_attr_update_fw.attr,
	NULL
};

1194 1195
static const struct attribute_group mxt_attr_group = {
	.attrs = mxt_attrs,
1196 1197
};

1198
static void mxt_start(struct mxt_data *data)
1199 1200
{
	/* Touch enable */
1201 1202
	mxt_write_object(data,
			MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
1203 1204
}

1205
static void mxt_stop(struct mxt_data *data)
1206 1207
{
	/* Touch disable */
1208 1209
	mxt_write_object(data,
			MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
1210 1211
}

1212
static int mxt_input_open(struct input_dev *dev)
1213
{
1214
	struct mxt_data *data = input_get_drvdata(dev);
1215

1216
	mxt_start(data);
1217 1218 1219 1220

	return 0;
}

1221
static void mxt_input_close(struct input_dev *dev)
1222
{
1223
	struct mxt_data *data = input_get_drvdata(dev);
1224

1225
	mxt_stop(data);
1226 1227
}

1228
static int __devinit mxt_probe(struct i2c_client *client,
1229 1230
		const struct i2c_device_id *id)
{
1231
	struct mxt_data *data;
1232 1233 1234 1235 1236 1237
	struct input_dev *input_dev;
	int error;

	if (!client->dev.platform_data)
		return -EINVAL;

1238
	data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
1239 1240 1241 1242 1243 1244 1245
	input_dev = input_allocate_device();
	if (!data || !input_dev) {
		dev_err(&client->dev, "Failed to allocate memory\n");
		error = -ENOMEM;
		goto err_free_mem;
	}

1246
	input_dev->name = "Atmel maXTouch Touchscreen";
1247 1248
	input_dev->id.bustype = BUS_I2C;
	input_dev->dev.parent = &client->dev;
1249 1250
	input_dev->open = mxt_input_open;
	input_dev->close = mxt_input_close;
1251 1252 1253 1254 1255 1256 1257

	__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,
1258
			     0, MXT_MAX_XC, 0, 0);
1259
	input_set_abs_params(input_dev, ABS_Y,
1260
			     0, MXT_MAX_YC, 0, 0);
1261 1262 1263

	/* For multi touch */
	input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
1264
			     0, MXT_MAX_AREA, 0, 0);
1265
	input_set_abs_params(input_dev, ABS_MT_POSITION_X,
1266
			     0, MXT_MAX_XC, 0, 0);
1267
	input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
1268
			     0, MXT_MAX_YC, 0, 0);
1269 1270 1271 1272 1273 1274 1275 1276 1277 1278

	input_set_drvdata(input_dev, data);

	data->client = client;
	data->input_dev = input_dev;
	data->pdata = client->dev.platform_data;
	data->irq = client->irq;

	i2c_set_clientdata(client, data);

1279
	error = mxt_initialize(data);
1280 1281 1282
	if (error)
		goto err_free_object;

1283
	error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
1284 1285 1286 1287 1288 1289 1290 1291 1292 1293
			IRQF_TRIGGER_FALLING, 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;

1294
	error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312
	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;
}

1313
static int __devexit mxt_remove(struct i2c_client *client)
1314
{
1315
	struct mxt_data *data = i2c_get_clientdata(client);
1316

1317
	sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
1318 1319 1320 1321 1322 1323 1324 1325 1326
	free_irq(data->irq, data);
	input_unregister_device(data->input_dev);
	kfree(data->object_table);
	kfree(data);

	return 0;
}

#ifdef CONFIG_PM
1327
static int mxt_suspend(struct device *dev)
1328
{
1329
	struct i2c_client *client = to_i2c_client(dev);
1330
	struct mxt_data *data = i2c_get_clientdata(client);
1331 1332 1333 1334 1335
	struct input_dev *input_dev = data->input_dev;

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
1336
		mxt_stop(data);
1337 1338 1339 1340 1341 1342

	mutex_unlock(&input_dev->mutex);

	return 0;
}

1343
static int mxt_resume(struct device *dev)
1344
{
1345
	struct i2c_client *client = to_i2c_client(dev);
1346
	struct mxt_data *data = i2c_get_clientdata(client);
1347 1348 1349
	struct input_dev *input_dev = data->input_dev;

	/* Soft reset */
1350 1351
	mxt_write_object(data, MXT_GEN_COMMAND,
			MXT_COMMAND_RESET, 1);
1352

1353
	msleep(MXT_RESET_TIME);
1354 1355 1356 1357

	mutex_lock(&input_dev->mutex);

	if (input_dev->users)
1358
		mxt_start(data);
1359 1360 1361 1362 1363

	mutex_unlock(&input_dev->mutex);

	return 0;
}
1364

1365 1366 1367
static const struct dev_pm_ops mxt_pm_ops = {
	.suspend	= mxt_suspend,
	.resume		= mxt_resume,
1368
};
1369 1370
#endif

1371
static const struct i2c_device_id mxt_id[] = {
1372
	{ "qt602240_ts", 0 },
1373
	{ "atmel_mxt_ts", 0 },
1374
	{ "mXT224", 0 },
1375 1376
	{ }
};
1377
MODULE_DEVICE_TABLE(i2c, mxt_id);
1378

1379
static struct i2c_driver mxt_driver = {
1380
	.driver = {
1381
		.name	= "atmel_mxt_ts",
1382
		.owner	= THIS_MODULE,
1383
#ifdef CONFIG_PM
1384
		.pm	= &mxt_pm_ops,
1385
#endif
1386
	},
1387 1388 1389
	.probe		= mxt_probe,
	.remove		= __devexit_p(mxt_remove),
	.id_table	= mxt_id,
1390 1391
};

1392
static int __init mxt_init(void)
1393
{
1394
	return i2c_add_driver(&mxt_driver);
1395 1396
}

1397
static void __exit mxt_exit(void)
1398
{
1399
	i2c_del_driver(&mxt_driver);
1400 1401
}

1402 1403
module_init(mxt_init);
module_exit(mxt_exit);
1404 1405 1406

/* Module information */
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
1407
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
1408
MODULE_LICENSE("GPL");