1215 lines
27 KiB
C
1215 lines
27 KiB
C
/*
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* Atmel maXTouch Touchscreen driver
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*
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* Copyright (C) 2010 Samsung Electronics Co.Ltd
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* Author: Joonyoung Shim <jy0922.shim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/firmware.h>
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#include <linux/i2c.h>
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#include <linux/i2c/atmel_mxt_ts.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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/* Version */
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#define MXT_VER_20 20
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#define MXT_VER_21 21
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#define MXT_VER_22 22
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/* Slave addresses */
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#define MXT_APP_LOW 0x4a
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#define MXT_APP_HIGH 0x4b
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#define MXT_BOOT_LOW 0x24
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#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
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#define MXT_VARIANT_ID 0x01
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#define MXT_VERSION 0x02
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#define MXT_BUILD 0x03
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#define MXT_MATRIX_X_SIZE 0x04
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#define MXT_MATRIX_Y_SIZE 0x05
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#define MXT_OBJECT_NUM 0x06
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#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
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#define MXT_GEN_MESSAGE 5
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#define MXT_GEN_COMMAND 6
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#define MXT_GEN_POWER 7
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#define MXT_GEN_ACQUIRE 8
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#define MXT_TOUCH_MULTI 9
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#define MXT_TOUCH_KEYARRAY 15
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#define MXT_TOUCH_PROXIMITY 23
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#define MXT_PROCI_GRIPFACE 20
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#define MXT_PROCG_NOISE 22
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#define MXT_PROCI_ONETOUCH 24
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#define MXT_PROCI_TWOTOUCH 27
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#define MXT_SPT_COMMSCONFIG 18 /* firmware ver 21 over */
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#define MXT_SPT_GPIOPWM 19
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#define MXT_SPT_SELFTEST 25
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#define MXT_SPT_CTECONFIG 28
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#define MXT_SPT_USERDATA 38 /* firmware ver 21 over */
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/* MXT_GEN_COMMAND field */
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#define MXT_COMMAND_RESET 0
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#define MXT_COMMAND_BACKUPNV 1
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#define MXT_COMMAND_CALIBRATE 2
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#define MXT_COMMAND_REPORTALL 3
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#define MXT_COMMAND_DIAGNOSTIC 5
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/* MXT_GEN_POWER field */
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#define MXT_POWER_IDLEACQINT 0
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#define MXT_POWER_ACTVACQINT 1
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#define MXT_POWER_ACTV2IDLETO 2
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/* MXT_GEN_ACQUIRE field */
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#define MXT_ACQUIRE_CHRGTIME 0
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#define MXT_ACQUIRE_TCHDRIFT 2
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#define MXT_ACQUIRE_DRIFTST 3
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#define MXT_ACQUIRE_TCHAUTOCAL 4
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#define MXT_ACQUIRE_SYNC 5
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#define MXT_ACQUIRE_ATCHCALST 6
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#define MXT_ACQUIRE_ATCHCALSTHR 7
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/* MXT_TOUCH_MULTI field */
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#define MXT_TOUCH_CTRL 0
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#define MXT_TOUCH_XORIGIN 1
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#define MXT_TOUCH_YORIGIN 2
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#define MXT_TOUCH_XSIZE 3
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#define MXT_TOUCH_YSIZE 4
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#define MXT_TOUCH_BLEN 6
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#define MXT_TOUCH_TCHTHR 7
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#define MXT_TOUCH_TCHDI 8
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#define MXT_TOUCH_ORIENT 9
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#define MXT_TOUCH_MOVHYSTI 11
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#define MXT_TOUCH_MOVHYSTN 12
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#define MXT_TOUCH_NUMTOUCH 14
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#define MXT_TOUCH_MRGHYST 15
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#define MXT_TOUCH_MRGTHR 16
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#define MXT_TOUCH_AMPHYST 17
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#define MXT_TOUCH_XRANGE_LSB 18
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#define MXT_TOUCH_XRANGE_MSB 19
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#define MXT_TOUCH_YRANGE_LSB 20
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#define MXT_TOUCH_YRANGE_MSB 21
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#define MXT_TOUCH_XLOCLIP 22
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#define MXT_TOUCH_XHICLIP 23
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#define MXT_TOUCH_YLOCLIP 24
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#define MXT_TOUCH_YHICLIP 25
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#define MXT_TOUCH_XEDGECTRL 26
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#define MXT_TOUCH_XEDGEDIST 27
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#define MXT_TOUCH_YEDGECTRL 28
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#define MXT_TOUCH_YEDGEDIST 29
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#define MXT_TOUCH_JUMPLIMIT 30 /* firmware ver 22 over */
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/* MXT_PROCI_GRIPFACE field */
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#define MXT_GRIPFACE_CTRL 0
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#define MXT_GRIPFACE_XLOGRIP 1
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#define MXT_GRIPFACE_XHIGRIP 2
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#define MXT_GRIPFACE_YLOGRIP 3
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#define MXT_GRIPFACE_YHIGRIP 4
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#define MXT_GRIPFACE_MAXTCHS 5
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#define MXT_GRIPFACE_SZTHR1 7
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#define MXT_GRIPFACE_SZTHR2 8
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#define MXT_GRIPFACE_SHPTHR1 9
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#define MXT_GRIPFACE_SHPTHR2 10
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#define MXT_GRIPFACE_SUPEXTTO 11
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/* MXT_PROCI_NOISE field */
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#define MXT_NOISE_CTRL 0
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#define MXT_NOISE_OUTFLEN 1
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#define MXT_NOISE_GCAFUL_LSB 3
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#define MXT_NOISE_GCAFUL_MSB 4
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#define MXT_NOISE_GCAFLL_LSB 5
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#define MXT_NOISE_GCAFLL_MSB 6
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#define MXT_NOISE_ACTVGCAFVALID 7
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#define MXT_NOISE_NOISETHR 8
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#define MXT_NOISE_FREQHOPSCALE 10
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#define MXT_NOISE_FREQ0 11
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#define MXT_NOISE_FREQ1 12
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#define MXT_NOISE_FREQ2 13
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#define MXT_NOISE_FREQ3 14
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#define MXT_NOISE_FREQ4 15
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#define MXT_NOISE_IDLEGCAFVALID 16
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/* MXT_SPT_COMMSCONFIG */
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#define MXT_COMMS_CTRL 0
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#define MXT_COMMS_CMD 1
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/* MXT_SPT_CTECONFIG field */
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#define MXT_CTE_CTRL 0
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#define MXT_CTE_CMD 1
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#define MXT_CTE_MODE 2
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#define MXT_CTE_IDLEGCAFDEPTH 3
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#define MXT_CTE_ACTVGCAFDEPTH 4
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#define MXT_CTE_VOLTAGE 5 /* firmware ver 21 over */
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#define MXT_VOLTAGE_DEFAULT 2700000
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#define MXT_VOLTAGE_STEP 10000
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/* Define for MXT_GEN_COMMAND */
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#define MXT_BOOT_VALUE 0xa5
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#define MXT_BACKUP_VALUE 0x55
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#define MXT_BACKUP_TIME 25 /* msec */
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#define MXT_RESET_TIME 65 /* msec */
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#define MXT_FWRESET_TIME 175 /* msec */
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/* Command to unlock bootloader */
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#define MXT_UNLOCK_CMD_MSB 0xaa
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#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 */
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#define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */
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#define MXT_FRAME_CRC_CHECK 0x02
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#define MXT_FRAME_CRC_FAIL 0x03
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#define MXT_FRAME_CRC_PASS 0x04
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#define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */
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#define MXT_BOOT_STATUS_MASK 0x3f
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/* Touch status */
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#define MXT_SUPPRESS (1 << 1)
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#define MXT_AMP (1 << 2)
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#define MXT_VECTOR (1 << 3)
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#define MXT_MOVE (1 << 4)
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#define MXT_RELEASE (1 << 5)
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#define MXT_PRESS (1 << 6)
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#define MXT_DETECT (1 << 7)
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/* Touchscreen absolute values */
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#define MXT_MAX_XC 0x3ff
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#define MXT_MAX_YC 0x3ff
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#define MXT_MAX_AREA 0xff
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#define MXT_MAX_FINGER 10
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struct mxt_info {
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u8 family_id;
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u8 variant_id;
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u8 version;
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u8 build;
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u8 matrix_xsize;
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u8 matrix_ysize;
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u8 object_num;
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};
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struct mxt_object {
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u8 type;
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u16 start_address;
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u8 size;
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u8 instances;
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u8 num_report_ids;
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/* to map object and message */
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u8 max_reportid;
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};
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struct mxt_message {
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u8 reportid;
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u8 message[7];
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u8 checksum;
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};
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struct mxt_finger {
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int status;
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int x;
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int y;
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int area;
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};
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/* Each client has this additional data */
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struct mxt_data {
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struct i2c_client *client;
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struct input_dev *input_dev;
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const struct mxt_platform_data *pdata;
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struct mxt_object *object_table;
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struct mxt_info info;
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struct mxt_finger finger[MXT_MAX_FINGER];
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unsigned int irq;
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};
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static bool mxt_object_readable(unsigned int type)
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{
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switch (type) {
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case MXT_GEN_MESSAGE:
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case MXT_GEN_COMMAND:
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case MXT_GEN_POWER:
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case MXT_GEN_ACQUIRE:
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case MXT_TOUCH_MULTI:
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case MXT_TOUCH_KEYARRAY:
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case MXT_TOUCH_PROXIMITY:
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case MXT_PROCI_GRIPFACE:
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case MXT_PROCG_NOISE:
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case MXT_PROCI_ONETOUCH:
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case MXT_PROCI_TWOTOUCH:
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case MXT_SPT_COMMSCONFIG:
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case MXT_SPT_GPIOPWM:
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case MXT_SPT_SELFTEST:
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case MXT_SPT_CTECONFIG:
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case MXT_SPT_USERDATA:
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return true;
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default:
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return false;
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}
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}
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static bool mxt_object_writable(unsigned int type)
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{
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switch (type) {
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case MXT_GEN_COMMAND:
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case MXT_GEN_POWER:
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case MXT_GEN_ACQUIRE:
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case MXT_TOUCH_MULTI:
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case MXT_TOUCH_KEYARRAY:
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case MXT_TOUCH_PROXIMITY:
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case MXT_PROCI_GRIPFACE:
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case MXT_PROCG_NOISE:
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case MXT_PROCI_ONETOUCH:
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case MXT_PROCI_TWOTOUCH:
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case MXT_SPT_GPIOPWM:
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case MXT_SPT_SELFTEST:
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case MXT_SPT_CTECONFIG:
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return true;
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default:
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return false;
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}
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}
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static void mxt_dump_message(struct device *dev,
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struct mxt_message *message)
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{
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dev_dbg(dev, "reportid:\t0x%x\n", message->reportid);
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dev_dbg(dev, "message1:\t0x%x\n", message->message[0]);
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dev_dbg(dev, "message2:\t0x%x\n", message->message[1]);
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dev_dbg(dev, "message3:\t0x%x\n", message->message[2]);
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dev_dbg(dev, "message4:\t0x%x\n", message->message[3]);
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dev_dbg(dev, "message5:\t0x%x\n", message->message[4]);
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dev_dbg(dev, "message6:\t0x%x\n", message->message[5]);
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dev_dbg(dev, "message7:\t0x%x\n", message->message[6]);
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dev_dbg(dev, "checksum:\t0x%x\n", message->checksum);
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}
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static int mxt_check_bootloader(struct i2c_client *client,
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unsigned int state)
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{
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u8 val;
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recheck:
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if (i2c_master_recv(client, &val, 1) != 1) {
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dev_err(&client->dev, "%s: i2c recv failed\n", __func__);
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return -EIO;
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}
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switch (state) {
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case MXT_WAITING_BOOTLOAD_CMD:
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case MXT_WAITING_FRAME_DATA:
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val &= ~MXT_BOOT_STATUS_MASK;
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break;
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case MXT_FRAME_CRC_PASS:
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if (val == MXT_FRAME_CRC_CHECK)
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goto recheck;
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break;
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default:
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return -EINVAL;
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}
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if (val != state) {
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dev_err(&client->dev, "Unvalid bootloader mode state\n");
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return -EINVAL;
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}
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return 0;
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}
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static int mxt_unlock_bootloader(struct i2c_client *client)
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{
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u8 buf[2];
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buf[0] = MXT_UNLOCK_CMD_LSB;
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buf[1] = MXT_UNLOCK_CMD_MSB;
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if (i2c_master_send(client, buf, 2) != 2) {
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dev_err(&client->dev, "%s: i2c send failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static int mxt_fw_write(struct i2c_client *client,
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const u8 *data, unsigned int frame_size)
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{
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if (i2c_master_send(client, data, frame_size) != frame_size) {
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dev_err(&client->dev, "%s: i2c send failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static int __mxt_read_reg(struct i2c_client *client,
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u16 reg, u16 len, void *val)
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{
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struct i2c_msg xfer[2];
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u8 buf[2];
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buf[0] = reg & 0xff;
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buf[1] = (reg >> 8) & 0xff;
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/* Write register */
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xfer[0].addr = client->addr;
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xfer[0].flags = 0;
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xfer[0].len = 2;
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xfer[0].buf = buf;
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/* Read data */
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xfer[1].addr = client->addr;
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xfer[1].flags = I2C_M_RD;
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xfer[1].len = len;
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xfer[1].buf = val;
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if (i2c_transfer(client->adapter, xfer, 2) != 2) {
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dev_err(&client->dev, "%s: i2c transfer failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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static int mxt_read_reg(struct i2c_client *client, u16 reg, u8 *val)
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{
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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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{
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u8 buf[3];
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buf[0] = reg & 0xff;
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buf[1] = (reg >> 8) & 0xff;
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buf[2] = val;
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if (i2c_master_send(client, buf, 3) != 3) {
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dev_err(&client->dev, "%s: i2c send failed\n", __func__);
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return -EIO;
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}
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return 0;
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}
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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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{
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return __mxt_read_reg(client, reg, MXT_OBJECT_SIZE,
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object_buf);
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}
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static struct mxt_object *
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mxt_get_object(struct mxt_data *data, u8 type)
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{
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struct mxt_object *object;
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int i;
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for (i = 0; i < data->info.object_num; i++) {
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object = data->object_table + i;
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if (object->type == type)
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return object;
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}
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dev_err(&data->client->dev, "Invalid object type\n");
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return NULL;
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}
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static int mxt_read_message(struct mxt_data *data,
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struct mxt_message *message)
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{
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struct mxt_object *object;
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u16 reg;
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object = mxt_get_object(data, MXT_GEN_MESSAGE);
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if (!object)
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return -EINVAL;
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reg = object->start_address;
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return __mxt_read_reg(data->client, reg,
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sizeof(struct mxt_message), message);
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}
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static int mxt_read_object(struct mxt_data *data,
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u8 type, u8 offset, u8 *val)
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{
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struct mxt_object *object;
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u16 reg;
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object = mxt_get_object(data, type);
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if (!object)
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return -EINVAL;
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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)
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{
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struct mxt_object *object;
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u16 reg;
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object = mxt_get_object(data, type);
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if (!object)
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return -EINVAL;
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reg = object->start_address;
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return mxt_write_reg(data->client, reg + offset, val);
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}
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static void mxt_input_report(struct mxt_data *data, int single_id)
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{
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struct mxt_finger *finger = data->finger;
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struct input_dev *input_dev = data->input_dev;
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int status = finger[single_id].status;
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int finger_num = 0;
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int id;
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for (id = 0; id < MXT_MAX_FINGER; id++) {
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if (!finger[id].status)
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continue;
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input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
|
|
finger[id].status != MXT_RELEASE ?
|
|
finger[id].area : 0);
|
|
input_report_abs(input_dev, ABS_MT_POSITION_X,
|
|
finger[id].x);
|
|
input_report_abs(input_dev, ABS_MT_POSITION_Y,
|
|
finger[id].y);
|
|
input_mt_sync(input_dev);
|
|
|
|
if (finger[id].status == MXT_RELEASE)
|
|
finger[id].status = 0;
|
|
else
|
|
finger_num++;
|
|
}
|
|
|
|
input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
|
|
|
|
if (status != MXT_RELEASE) {
|
|
input_report_abs(input_dev, ABS_X, finger[single_id].x);
|
|
input_report_abs(input_dev, ABS_Y, finger[single_id].y);
|
|
}
|
|
|
|
input_sync(input_dev);
|
|
}
|
|
|
|
static void mxt_input_touchevent(struct mxt_data *data,
|
|
struct mxt_message *message, int id)
|
|
{
|
|
struct mxt_finger *finger = data->finger;
|
|
struct device *dev = &data->client->dev;
|
|
u8 status = message->message[0];
|
|
int x;
|
|
int y;
|
|
int area;
|
|
|
|
/* Check the touch is present on the screen */
|
|
if (!(status & MXT_DETECT)) {
|
|
if (status & MXT_RELEASE) {
|
|
dev_dbg(dev, "[%d] released\n", id);
|
|
|
|
finger[id].status = MXT_RELEASE;
|
|
mxt_input_report(data, id);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/* Check only AMP detection */
|
|
if (!(status & (MXT_PRESS | MXT_MOVE)))
|
|
return;
|
|
|
|
x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
|
|
y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
|
|
area = message->message[4];
|
|
|
|
dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
|
|
status & MXT_MOVE ? "moved" : "pressed",
|
|
x, y, area);
|
|
|
|
finger[id].status = status & MXT_MOVE ?
|
|
MXT_MOVE : MXT_PRESS;
|
|
finger[id].x = x;
|
|
finger[id].y = y;
|
|
finger[id].area = area;
|
|
|
|
mxt_input_report(data, id);
|
|
}
|
|
|
|
static irqreturn_t mxt_interrupt(int irq, void *dev_id)
|
|
{
|
|
struct mxt_data *data = dev_id;
|
|
struct mxt_message message;
|
|
struct mxt_object *object;
|
|
struct device *dev = &data->client->dev;
|
|
int id;
|
|
u8 reportid;
|
|
u8 max_reportid;
|
|
u8 min_reportid;
|
|
|
|
do {
|
|
if (mxt_read_message(data, &message)) {
|
|
dev_err(dev, "Failed to read message\n");
|
|
goto end;
|
|
}
|
|
|
|
reportid = message.reportid;
|
|
|
|
/* whether reportid is thing of MXT_TOUCH_MULTI */
|
|
object = mxt_get_object(data, MXT_TOUCH_MULTI);
|
|
if (!object)
|
|
goto end;
|
|
|
|
max_reportid = object->max_reportid;
|
|
min_reportid = max_reportid - object->num_report_ids + 1;
|
|
id = reportid - min_reportid;
|
|
|
|
if (reportid >= min_reportid && reportid <= max_reportid)
|
|
mxt_input_touchevent(data, &message, id);
|
|
else
|
|
mxt_dump_message(dev, &message);
|
|
} while (reportid != 0xff);
|
|
|
|
end:
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int mxt_check_reg_init(struct mxt_data *data)
|
|
{
|
|
const struct mxt_platform_data *pdata = data->pdata;
|
|
struct mxt_object *object;
|
|
struct device *dev = &data->client->dev;
|
|
int index = 0;
|
|
int i, j, config_offset;
|
|
|
|
if (!pdata->config) {
|
|
dev_dbg(dev, "No cfg data defined, skipping reg init\n");
|
|
return 0;
|
|
}
|
|
|
|
for (i = 0; i < data->info.object_num; i++) {
|
|
object = data->object_table + i;
|
|
|
|
if (!mxt_object_writable(object->type))
|
|
continue;
|
|
|
|
for (j = 0; j < object->size + 1; j++) {
|
|
config_offset = index + j;
|
|
if (config_offset > pdata->config_length) {
|
|
dev_err(dev, "Not enough config data!\n");
|
|
return -EINVAL;
|
|
}
|
|
mxt_write_object(data, object->type, j,
|
|
pdata->config[config_offset]);
|
|
}
|
|
index += object->size + 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxt_make_highchg(struct mxt_data *data)
|
|
{
|
|
struct device *dev = &data->client->dev;
|
|
struct mxt_message message;
|
|
int count = 10;
|
|
int error;
|
|
|
|
/* Read dummy message to make high CHG pin */
|
|
do {
|
|
error = mxt_read_message(data, &message);
|
|
if (error)
|
|
return error;
|
|
} while (message.reportid != 0xff && --count);
|
|
|
|
if (!count) {
|
|
dev_err(dev, "CHG pin isn't cleared\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mxt_handle_pdata(struct mxt_data *data)
|
|
{
|
|
const struct mxt_platform_data *pdata = data->pdata;
|
|
u8 voltage;
|
|
|
|
/* Set touchscreen lines */
|
|
mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_XSIZE,
|
|
pdata->x_line);
|
|
mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_YSIZE,
|
|
pdata->y_line);
|
|
|
|
/* Set touchscreen orient */
|
|
mxt_write_object(data, MXT_TOUCH_MULTI, MXT_TOUCH_ORIENT,
|
|
pdata->orient);
|
|
|
|
/* Set touchscreen burst length */
|
|
mxt_write_object(data, MXT_TOUCH_MULTI,
|
|
MXT_TOUCH_BLEN, pdata->blen);
|
|
|
|
/* Set touchscreen threshold */
|
|
mxt_write_object(data, MXT_TOUCH_MULTI,
|
|
MXT_TOUCH_TCHTHR, pdata->threshold);
|
|
|
|
/* Set touchscreen resolution */
|
|
mxt_write_object(data, MXT_TOUCH_MULTI,
|
|
MXT_TOUCH_XRANGE_LSB, (pdata->x_size - 1) & 0xff);
|
|
mxt_write_object(data, MXT_TOUCH_MULTI,
|
|
MXT_TOUCH_XRANGE_MSB, (pdata->x_size - 1) >> 8);
|
|
mxt_write_object(data, MXT_TOUCH_MULTI,
|
|
MXT_TOUCH_YRANGE_LSB, (pdata->y_size - 1) & 0xff);
|
|
mxt_write_object(data, MXT_TOUCH_MULTI,
|
|
MXT_TOUCH_YRANGE_MSB, (pdata->y_size - 1) >> 8);
|
|
|
|
/* Set touchscreen voltage */
|
|
if (data->info.version >= MXT_VER_21 && pdata->voltage) {
|
|
if (pdata->voltage < MXT_VOLTAGE_DEFAULT) {
|
|
voltage = (MXT_VOLTAGE_DEFAULT - pdata->voltage) /
|
|
MXT_VOLTAGE_STEP;
|
|
voltage = 0xff - voltage + 1;
|
|
} else
|
|
voltage = (pdata->voltage - MXT_VOLTAGE_DEFAULT) /
|
|
MXT_VOLTAGE_STEP;
|
|
|
|
mxt_write_object(data, MXT_SPT_CTECONFIG,
|
|
MXT_CTE_VOLTAGE, voltage);
|
|
}
|
|
}
|
|
|
|
static int mxt_get_info(struct mxt_data *data)
|
|
{
|
|
struct i2c_client *client = data->client;
|
|
struct mxt_info *info = &data->info;
|
|
int error;
|
|
u8 val;
|
|
|
|
error = mxt_read_reg(client, MXT_FAMILY_ID, &val);
|
|
if (error)
|
|
return error;
|
|
info->family_id = val;
|
|
|
|
error = mxt_read_reg(client, MXT_VARIANT_ID, &val);
|
|
if (error)
|
|
return error;
|
|
info->variant_id = val;
|
|
|
|
error = mxt_read_reg(client, MXT_VERSION, &val);
|
|
if (error)
|
|
return error;
|
|
info->version = val;
|
|
|
|
error = mxt_read_reg(client, MXT_BUILD, &val);
|
|
if (error)
|
|
return error;
|
|
info->build = val;
|
|
|
|
error = mxt_read_reg(client, MXT_OBJECT_NUM, &val);
|
|
if (error)
|
|
return error;
|
|
info->object_num = val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxt_get_object_table(struct mxt_data *data)
|
|
{
|
|
int error;
|
|
int i;
|
|
u16 reg;
|
|
u8 reportid = 0;
|
|
u8 buf[MXT_OBJECT_SIZE];
|
|
|
|
for (i = 0; i < data->info.object_num; i++) {
|
|
struct mxt_object *object = data->object_table + i;
|
|
|
|
reg = MXT_OBJECT_START + MXT_OBJECT_SIZE * i;
|
|
error = mxt_read_object_table(data->client, reg, buf);
|
|
if (error)
|
|
return error;
|
|
|
|
object->type = buf[0];
|
|
object->start_address = (buf[2] << 8) | buf[1];
|
|
object->size = buf[3];
|
|
object->instances = buf[4];
|
|
object->num_report_ids = buf[5];
|
|
|
|
if (object->num_report_ids) {
|
|
reportid += object->num_report_ids *
|
|
(object->instances + 1);
|
|
object->max_reportid = reportid;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxt_initialize(struct mxt_data *data)
|
|
{
|
|
struct i2c_client *client = data->client;
|
|
struct mxt_info *info = &data->info;
|
|
int error;
|
|
u8 val;
|
|
|
|
error = mxt_get_info(data);
|
|
if (error)
|
|
return error;
|
|
|
|
data->object_table = kcalloc(info->object_num,
|
|
sizeof(struct mxt_object),
|
|
GFP_KERNEL);
|
|
if (!data->object_table) {
|
|
dev_err(&client->dev, "Failed to allocate memory\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Get object table information */
|
|
error = mxt_get_object_table(data);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Check register init values */
|
|
error = mxt_check_reg_init(data);
|
|
if (error)
|
|
return error;
|
|
|
|
error = mxt_make_highchg(data);
|
|
if (error)
|
|
return error;
|
|
|
|
mxt_handle_pdata(data);
|
|
|
|
/* Backup to memory */
|
|
mxt_write_object(data, MXT_GEN_COMMAND,
|
|
MXT_COMMAND_BACKUPNV,
|
|
MXT_BACKUP_VALUE);
|
|
msleep(MXT_BACKUP_TIME);
|
|
|
|
/* Soft reset */
|
|
mxt_write_object(data, MXT_GEN_COMMAND,
|
|
MXT_COMMAND_RESET, 1);
|
|
msleep(MXT_RESET_TIME);
|
|
|
|
/* Update matrix size at info struct */
|
|
error = mxt_read_reg(client, MXT_MATRIX_X_SIZE, &val);
|
|
if (error)
|
|
return error;
|
|
info->matrix_xsize = val;
|
|
|
|
error = mxt_read_reg(client, MXT_MATRIX_Y_SIZE, &val);
|
|
if (error)
|
|
return error;
|
|
info->matrix_ysize = val;
|
|
|
|
dev_info(&client->dev,
|
|
"Family ID: %d Variant ID: %d Version: %d Build: %d\n",
|
|
info->family_id, info->variant_id, info->version,
|
|
info->build);
|
|
|
|
dev_info(&client->dev,
|
|
"Matrix X Size: %d Matrix Y Size: %d Object Num: %d\n",
|
|
info->matrix_xsize, info->matrix_ysize,
|
|
info->object_num);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t mxt_object_show(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct mxt_data *data = dev_get_drvdata(dev);
|
|
struct mxt_object *object;
|
|
int count = 0;
|
|
int i, j;
|
|
int error;
|
|
u8 val;
|
|
|
|
for (i = 0; i < data->info.object_num; i++) {
|
|
object = data->object_table + i;
|
|
|
|
count += sprintf(buf + count,
|
|
"Object Table Element %d(Type %d)\n",
|
|
i + 1, object->type);
|
|
|
|
if (!mxt_object_readable(object->type)) {
|
|
count += sprintf(buf + count, "\n");
|
|
continue;
|
|
}
|
|
|
|
for (j = 0; j < object->size + 1; j++) {
|
|
error = mxt_read_object(data,
|
|
object->type, j, &val);
|
|
if (error)
|
|
return error;
|
|
|
|
count += sprintf(buf + count,
|
|
" Byte %d: 0x%x (%d)\n", j, val, val);
|
|
}
|
|
|
|
count += sprintf(buf + count, "\n");
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int mxt_load_fw(struct device *dev, const char *fn)
|
|
{
|
|
struct mxt_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
const struct firmware *fw = NULL;
|
|
unsigned int frame_size;
|
|
unsigned int pos = 0;
|
|
int ret;
|
|
|
|
ret = request_firmware(&fw, fn, dev);
|
|
if (ret) {
|
|
dev_err(dev, "Unable to open firmware %s\n", fn);
|
|
return ret;
|
|
}
|
|
|
|
/* Change to the bootloader mode */
|
|
mxt_write_object(data, MXT_GEN_COMMAND,
|
|
MXT_COMMAND_RESET, MXT_BOOT_VALUE);
|
|
msleep(MXT_RESET_TIME);
|
|
|
|
/* Change to slave address of bootloader */
|
|
if (client->addr == MXT_APP_LOW)
|
|
client->addr = MXT_BOOT_LOW;
|
|
else
|
|
client->addr = MXT_BOOT_HIGH;
|
|
|
|
ret = mxt_check_bootloader(client, MXT_WAITING_BOOTLOAD_CMD);
|
|
if (ret)
|
|
goto out;
|
|
|
|
/* Unlock bootloader */
|
|
mxt_unlock_bootloader(client);
|
|
|
|
while (pos < fw->size) {
|
|
ret = mxt_check_bootloader(client,
|
|
MXT_WAITING_FRAME_DATA);
|
|
if (ret)
|
|
goto out;
|
|
|
|
frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1));
|
|
|
|
/* We should add 2 at frame size as the the firmware data is not
|
|
* included the CRC bytes.
|
|
*/
|
|
frame_size += 2;
|
|
|
|
/* Write one frame to device */
|
|
mxt_fw_write(client, fw->data + pos, frame_size);
|
|
|
|
ret = mxt_check_bootloader(client,
|
|
MXT_FRAME_CRC_PASS);
|
|
if (ret)
|
|
goto out;
|
|
|
|
pos += frame_size;
|
|
|
|
dev_dbg(dev, "Updated %d bytes / %zd bytes\n", pos, fw->size);
|
|
}
|
|
|
|
out:
|
|
release_firmware(fw);
|
|
|
|
/* Change to slave address of application */
|
|
if (client->addr == MXT_BOOT_LOW)
|
|
client->addr = MXT_APP_LOW;
|
|
else
|
|
client->addr = MXT_APP_HIGH;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t mxt_update_fw_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct mxt_data *data = dev_get_drvdata(dev);
|
|
unsigned int version;
|
|
int error;
|
|
|
|
if (sscanf(buf, "%u", &version) != 1) {
|
|
dev_err(dev, "Invalid values\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (data->info.version < MXT_VER_21 || version < MXT_VER_21) {
|
|
dev_err(dev, "FW update supported starting with version 21\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
disable_irq(data->irq);
|
|
|
|
error = mxt_load_fw(dev, MXT_FW_NAME);
|
|
if (error) {
|
|
dev_err(dev, "The firmware update failed(%d)\n", error);
|
|
count = error;
|
|
} else {
|
|
dev_dbg(dev, "The firmware update succeeded\n");
|
|
|
|
/* Wait for reset */
|
|
msleep(MXT_FWRESET_TIME);
|
|
|
|
kfree(data->object_table);
|
|
data->object_table = NULL;
|
|
|
|
mxt_initialize(data);
|
|
}
|
|
|
|
enable_irq(data->irq);
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(object, 0444, mxt_object_show, NULL);
|
|
static DEVICE_ATTR(update_fw, 0664, NULL, mxt_update_fw_store);
|
|
|
|
static struct attribute *mxt_attrs[] = {
|
|
&dev_attr_object.attr,
|
|
&dev_attr_update_fw.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group mxt_attr_group = {
|
|
.attrs = mxt_attrs,
|
|
};
|
|
|
|
static void mxt_start(struct mxt_data *data)
|
|
{
|
|
/* Touch enable */
|
|
mxt_write_object(data,
|
|
MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0x83);
|
|
}
|
|
|
|
static void mxt_stop(struct mxt_data *data)
|
|
{
|
|
/* Touch disable */
|
|
mxt_write_object(data,
|
|
MXT_TOUCH_MULTI, MXT_TOUCH_CTRL, 0);
|
|
}
|
|
|
|
static int mxt_input_open(struct input_dev *dev)
|
|
{
|
|
struct mxt_data *data = input_get_drvdata(dev);
|
|
|
|
mxt_start(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mxt_input_close(struct input_dev *dev)
|
|
{
|
|
struct mxt_data *data = input_get_drvdata(dev);
|
|
|
|
mxt_stop(data);
|
|
}
|
|
|
|
static int __devinit mxt_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
const struct mxt_platform_data *pdata = client->dev.platform_data;
|
|
struct mxt_data *data;
|
|
struct input_dev *input_dev;
|
|
int error;
|
|
|
|
if (!pdata)
|
|
return -EINVAL;
|
|
|
|
data = kzalloc(sizeof(struct mxt_data), GFP_KERNEL);
|
|
input_dev = input_allocate_device();
|
|
if (!data || !input_dev) {
|
|
dev_err(&client->dev, "Failed to allocate memory\n");
|
|
error = -ENOMEM;
|
|
goto err_free_mem;
|
|
}
|
|
|
|
input_dev->name = "Atmel maXTouch Touchscreen";
|
|
input_dev->id.bustype = BUS_I2C;
|
|
input_dev->dev.parent = &client->dev;
|
|
input_dev->open = mxt_input_open;
|
|
input_dev->close = mxt_input_close;
|
|
|
|
__set_bit(EV_ABS, input_dev->evbit);
|
|
__set_bit(EV_KEY, input_dev->evbit);
|
|
__set_bit(BTN_TOUCH, input_dev->keybit);
|
|
|
|
/* For single touch */
|
|
input_set_abs_params(input_dev, ABS_X,
|
|
0, MXT_MAX_XC, 0, 0);
|
|
input_set_abs_params(input_dev, ABS_Y,
|
|
0, MXT_MAX_YC, 0, 0);
|
|
|
|
/* For multi touch */
|
|
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
|
|
0, MXT_MAX_AREA, 0, 0);
|
|
input_set_abs_params(input_dev, ABS_MT_POSITION_X,
|
|
0, MXT_MAX_XC, 0, 0);
|
|
input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
|
|
0, MXT_MAX_YC, 0, 0);
|
|
|
|
input_set_drvdata(input_dev, data);
|
|
|
|
data->client = client;
|
|
data->input_dev = input_dev;
|
|
data->pdata = pdata;
|
|
data->irq = client->irq;
|
|
|
|
i2c_set_clientdata(client, data);
|
|
|
|
error = mxt_initialize(data);
|
|
if (error)
|
|
goto err_free_object;
|
|
|
|
error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
|
|
pdata->irqflags, client->dev.driver->name, data);
|
|
if (error) {
|
|
dev_err(&client->dev, "Failed to register interrupt\n");
|
|
goto err_free_object;
|
|
}
|
|
|
|
error = input_register_device(input_dev);
|
|
if (error)
|
|
goto err_free_irq;
|
|
|
|
error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group);
|
|
if (error)
|
|
goto err_unregister_device;
|
|
|
|
return 0;
|
|
|
|
err_unregister_device:
|
|
input_unregister_device(input_dev);
|
|
input_dev = NULL;
|
|
err_free_irq:
|
|
free_irq(client->irq, data);
|
|
err_free_object:
|
|
kfree(data->object_table);
|
|
err_free_mem:
|
|
input_free_device(input_dev);
|
|
kfree(data);
|
|
return error;
|
|
}
|
|
|
|
static int __devexit mxt_remove(struct i2c_client *client)
|
|
{
|
|
struct mxt_data *data = i2c_get_clientdata(client);
|
|
|
|
sysfs_remove_group(&client->dev.kobj, &mxt_attr_group);
|
|
free_irq(data->irq, data);
|
|
input_unregister_device(data->input_dev);
|
|
kfree(data->object_table);
|
|
kfree(data);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int mxt_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct mxt_data *data = i2c_get_clientdata(client);
|
|
struct input_dev *input_dev = data->input_dev;
|
|
|
|
mutex_lock(&input_dev->mutex);
|
|
|
|
if (input_dev->users)
|
|
mxt_stop(data);
|
|
|
|
mutex_unlock(&input_dev->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mxt_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct mxt_data *data = i2c_get_clientdata(client);
|
|
struct input_dev *input_dev = data->input_dev;
|
|
|
|
/* Soft reset */
|
|
mxt_write_object(data, MXT_GEN_COMMAND,
|
|
MXT_COMMAND_RESET, 1);
|
|
|
|
msleep(MXT_RESET_TIME);
|
|
|
|
mutex_lock(&input_dev->mutex);
|
|
|
|
if (input_dev->users)
|
|
mxt_start(data);
|
|
|
|
mutex_unlock(&input_dev->mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops mxt_pm_ops = {
|
|
.suspend = mxt_suspend,
|
|
.resume = mxt_resume,
|
|
};
|
|
#endif
|
|
|
|
static const struct i2c_device_id mxt_id[] = {
|
|
{ "qt602240_ts", 0 },
|
|
{ "atmel_mxt_ts", 0 },
|
|
{ "mXT224", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, mxt_id);
|
|
|
|
static struct i2c_driver mxt_driver = {
|
|
.driver = {
|
|
.name = "atmel_mxt_ts",
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_PM
|
|
.pm = &mxt_pm_ops,
|
|
#endif
|
|
},
|
|
.probe = mxt_probe,
|
|
.remove = __devexit_p(mxt_remove),
|
|
.id_table = mxt_id,
|
|
};
|
|
|
|
static int __init mxt_init(void)
|
|
{
|
|
return i2c_add_driver(&mxt_driver);
|
|
}
|
|
|
|
static void __exit mxt_exit(void)
|
|
{
|
|
i2c_del_driver(&mxt_driver);
|
|
}
|
|
|
|
module_init(mxt_init);
|
|
module_exit(mxt_exit);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
|
|
MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver");
|
|
MODULE_LICENSE("GPL");
|