1219 lines
28 KiB
C
1219 lines
28 KiB
C
/*
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* ROHM BU21023/24 Dual touch support resistive touch screen driver
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* Copyright (C) 2012 ROHM CO.,LTD.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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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/input.h>
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#include <linux/input/mt.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#define BU21023_NAME "bu21023_ts"
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#define BU21023_FIRMWARE_NAME "bu21023.bin"
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#define MAX_CONTACTS 2
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#define AXIS_ADJUST 4
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#define AXIS_OFFSET 8
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#define FIRMWARE_BLOCK_SIZE 32U
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#define FIRMWARE_RETRY_MAX 4
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#define SAMPLING_DELAY 12 /* msec */
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#define CALIBRATION_RETRY_MAX 6
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#define ROHM_TS_ABS_X_MIN 40
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#define ROHM_TS_ABS_X_MAX 990
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#define ROHM_TS_ABS_Y_MIN 160
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#define ROHM_TS_ABS_Y_MAX 920
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#define ROHM_TS_DISPLACEMENT_MAX 0 /* zero for infinite */
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/*
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* BU21023GUL/BU21023MUV/BU21024FV-M registers map
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*/
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#define VADOUT_YP_H 0x00
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#define VADOUT_YP_L 0x01
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#define VADOUT_XP_H 0x02
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#define VADOUT_XP_L 0x03
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#define VADOUT_YN_H 0x04
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#define VADOUT_YN_L 0x05
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#define VADOUT_XN_H 0x06
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#define VADOUT_XN_L 0x07
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#define PRM1_X_H 0x08
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#define PRM1_X_L 0x09
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#define PRM1_Y_H 0x0a
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#define PRM1_Y_L 0x0b
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#define PRM2_X_H 0x0c
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#define PRM2_X_L 0x0d
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#define PRM2_Y_H 0x0e
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#define PRM2_Y_L 0x0f
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#define MLT_PRM_MONI_X 0x10
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#define MLT_PRM_MONI_Y 0x11
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#define DEBUG_MONI_1 0x12
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#define DEBUG_MONI_2 0x13
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#define VADOUT_ZX_H 0x14
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#define VADOUT_ZX_L 0x15
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#define VADOUT_ZY_H 0x16
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#define VADOUT_ZY_L 0x17
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#define Z_PARAM_H 0x18
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#define Z_PARAM_L 0x19
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/*
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* Value for VADOUT_*_L
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*/
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#define VADOUT_L_MASK 0x01
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/*
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* Value for PRM*_*_L
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*/
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#define PRM_L_MASK 0x01
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#define POS_X1_H 0x20
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#define POS_X1_L 0x21
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#define POS_Y1_H 0x22
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#define POS_Y1_L 0x23
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#define POS_X2_H 0x24
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#define POS_X2_L 0x25
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#define POS_Y2_H 0x26
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#define POS_Y2_L 0x27
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/*
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* Value for POS_*_L
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*/
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#define POS_L_MASK 0x01
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#define TOUCH 0x28
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#define TOUCH_DETECT 0x01
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#define TOUCH_GESTURE 0x29
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#define SINGLE_TOUCH 0x01
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#define DUAL_TOUCH 0x03
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#define TOUCH_MASK 0x03
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#define CALIBRATION_REQUEST 0x04
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#define CALIBRATION_STATUS 0x08
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#define CALIBRATION_MASK 0x0c
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#define GESTURE_SPREAD 0x10
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#define GESTURE_PINCH 0x20
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#define GESTURE_ROTATE_R 0x40
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#define GESTURE_ROTATE_L 0x80
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#define INT_STATUS 0x2a
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#define INT_MASK 0x3d
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#define INT_CLEAR 0x3e
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/*
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* Values for INT_*
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*/
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#define COORD_UPDATE 0x01
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#define CALIBRATION_DONE 0x02
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#define SLEEP_IN 0x04
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#define SLEEP_OUT 0x08
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#define PROGRAM_LOAD_DONE 0x10
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#define ERROR 0x80
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#define INT_ALL 0x9f
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#define ERR_STATUS 0x2b
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#define ERR_MASK 0x3f
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/*
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* Values for ERR_*
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*/
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#define ADC_TIMEOUT 0x01
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#define CPU_TIMEOUT 0x02
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#define CALIBRATION_ERR 0x04
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#define PROGRAM_LOAD_ERR 0x10
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#define COMMON_SETUP1 0x30
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#define PROGRAM_LOAD_HOST 0x02
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#define PROGRAM_LOAD_EEPROM 0x03
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#define CENSOR_4PORT 0x04
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#define CENSOR_8PORT 0x00 /* Not supported by BU21023 */
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#define CALIBRATION_TYPE_DEFAULT 0x08
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#define CALIBRATION_TYPE_SPECIAL 0x00
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#define INT_ACTIVE_HIGH 0x10
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#define INT_ACTIVE_LOW 0x00
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#define AUTO_CALIBRATION 0x40
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#define MANUAL_CALIBRATION 0x00
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#define COMMON_SETUP1_DEFAULT 0x4e
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#define COMMON_SETUP2 0x31
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#define MAF_NONE 0x00
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#define MAF_1SAMPLE 0x01
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#define MAF_3SAMPLES 0x02
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#define MAF_5SAMPLES 0x03
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#define INV_Y 0x04
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#define INV_X 0x08
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#define SWAP_XY 0x10
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#define COMMON_SETUP3 0x32
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#define EN_SLEEP 0x01
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#define EN_MULTI 0x02
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#define EN_GESTURE 0x04
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#define EN_INTVL 0x08
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#define SEL_STEP 0x10
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#define SEL_MULTI 0x20
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#define SEL_TBL_DEFAULT 0x40
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#define INTERVAL_TIME 0x33
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#define INTERVAL_TIME_DEFAULT 0x10
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#define STEP_X 0x34
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#define STEP_X_DEFAULT 0x41
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#define STEP_Y 0x35
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#define STEP_Y_DEFAULT 0x8d
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#define OFFSET_X 0x38
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#define OFFSET_X_DEFAULT 0x0c
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#define OFFSET_Y 0x39
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#define OFFSET_Y_DEFAULT 0x0c
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#define THRESHOLD_TOUCH 0x3a
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#define THRESHOLD_TOUCH_DEFAULT 0xa0
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#define THRESHOLD_GESTURE 0x3b
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#define THRESHOLD_GESTURE_DEFAULT 0x17
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#define SYSTEM 0x40
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#define ANALOG_POWER_ON 0x01
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#define ANALOG_POWER_OFF 0x00
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#define CPU_POWER_ON 0x02
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#define CPU_POWER_OFF 0x00
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#define FORCE_CALIBRATION 0x42
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#define FORCE_CALIBRATION_ON 0x01
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#define FORCE_CALIBRATION_OFF 0x00
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#define CPU_FREQ 0x50 /* 10 / (reg + 1) MHz */
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#define CPU_FREQ_10MHZ 0x00
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#define CPU_FREQ_5MHZ 0x01
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#define CPU_FREQ_1MHZ 0x09
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#define EEPROM_ADDR 0x51
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#define CALIBRATION_ADJUST 0x52
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#define CALIBRATION_ADJUST_DEFAULT 0x00
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#define THRESHOLD_SLEEP_IN 0x53
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#define EVR_XY 0x56
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#define EVR_XY_DEFAULT 0x10
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#define PRM_SWOFF_TIME 0x57
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#define PRM_SWOFF_TIME_DEFAULT 0x04
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#define PROGRAM_VERSION 0x5f
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#define ADC_CTRL 0x60
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#define ADC_DIV_MASK 0x1f /* The minimum value is 4 */
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#define ADC_DIV_DEFAULT 0x08
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#define ADC_WAIT 0x61
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#define ADC_WAIT_DEFAULT 0x0a
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#define SWCONT 0x62
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#define SWCONT_DEFAULT 0x0f
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#define EVR_X 0x63
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#define EVR_X_DEFAULT 0x86
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#define EVR_Y 0x64
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#define EVR_Y_DEFAULT 0x64
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#define TEST1 0x65
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#define DUALTOUCH_STABILIZE_ON 0x01
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#define DUALTOUCH_STABILIZE_OFF 0x00
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#define DUALTOUCH_REG_ON 0x20
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#define DUALTOUCH_REG_OFF 0x00
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#define CALIBRATION_REG1 0x68
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#define CALIBRATION_REG1_DEFAULT 0xd9
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#define CALIBRATION_REG2 0x69
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#define CALIBRATION_REG2_DEFAULT 0x36
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#define CALIBRATION_REG3 0x6a
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#define CALIBRATION_REG3_DEFAULT 0x32
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#define EX_ADDR_H 0x70
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#define EX_ADDR_L 0x71
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#define EX_WDAT 0x72
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#define EX_RDAT 0x73
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#define EX_CHK_SUM1 0x74
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#define EX_CHK_SUM2 0x75
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#define EX_CHK_SUM3 0x76
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struct rohm_ts_data {
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struct i2c_client *client;
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struct input_dev *input;
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bool initialized;
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unsigned int contact_count[MAX_CONTACTS + 1];
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int finger_count;
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u8 setup2;
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};
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/*
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* rohm_i2c_burst_read - execute combined I2C message for ROHM BU21023/24
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* @client: Handle to ROHM BU21023/24
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* @start: Where to start read address from ROHM BU21023/24
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* @buf: Where to store read data from ROHM BU21023/24
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* @len: How many bytes to read
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*
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* Returns negative errno, else zero on success.
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*
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* Note
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* In BU21023/24 burst read, stop condition is needed after "address write".
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* Therefore, transmission is performed in 2 steps.
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*/
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static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf,
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size_t len)
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{
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struct i2c_adapter *adap = client->adapter;
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struct i2c_msg msg[2];
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int i, ret = 0;
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msg[0].addr = client->addr;
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msg[0].flags = 0;
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msg[0].len = 1;
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msg[0].buf = &start;
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msg[1].addr = client->addr;
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msg[1].flags = I2C_M_RD;
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msg[1].len = len;
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msg[1].buf = buf;
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i2c_lock_bus(adap, I2C_LOCK_SEGMENT);
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for (i = 0; i < 2; i++) {
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if (__i2c_transfer(adap, &msg[i], 1) < 0) {
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ret = -EIO;
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break;
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}
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}
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i2c_unlock_bus(adap, I2C_LOCK_SEGMENT);
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return ret;
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}
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static int rohm_ts_manual_calibration(struct rohm_ts_data *ts)
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{
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struct i2c_client *client = ts->client;
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struct device *dev = &client->dev;
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u8 buf[33]; /* for PRM1_X_H(0x08)-TOUCH(0x28) */
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int retry;
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bool success = false;
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bool first_time = true;
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bool calibration_done;
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u8 reg1, reg2, reg3;
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s32 reg1_orig, reg2_orig, reg3_orig;
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s32 val;
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int calib_x = 0, calib_y = 0;
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int reg_x, reg_y;
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int err_x, err_y;
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int error, error2;
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int i;
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reg1_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG1);
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if (reg1_orig < 0)
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return reg1_orig;
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reg2_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG2);
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if (reg2_orig < 0)
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return reg2_orig;
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reg3_orig = i2c_smbus_read_byte_data(client, CALIBRATION_REG3);
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if (reg3_orig < 0)
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return reg3_orig;
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error = i2c_smbus_write_byte_data(client, INT_MASK,
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COORD_UPDATE | SLEEP_IN | SLEEP_OUT |
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PROGRAM_LOAD_DONE);
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if (error)
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goto out;
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error = i2c_smbus_write_byte_data(client, TEST1,
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DUALTOUCH_STABILIZE_ON);
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if (error)
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goto out;
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for (retry = 0; retry < CALIBRATION_RETRY_MAX; retry++) {
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/* wait 2 sampling for update */
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mdelay(2 * SAMPLING_DELAY);
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#define READ_CALIB_BUF(reg) buf[((reg) - PRM1_X_H)]
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error = rohm_i2c_burst_read(client, PRM1_X_H, buf, sizeof(buf));
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if (error)
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goto out;
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if (READ_CALIB_BUF(TOUCH) & TOUCH_DETECT)
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continue;
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if (first_time) {
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/* generate calibration parameter */
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calib_x = ((int)READ_CALIB_BUF(PRM1_X_H) << 2 |
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READ_CALIB_BUF(PRM1_X_L)) - AXIS_OFFSET;
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calib_y = ((int)READ_CALIB_BUF(PRM1_Y_H) << 2 |
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READ_CALIB_BUF(PRM1_Y_L)) - AXIS_OFFSET;
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error = i2c_smbus_write_byte_data(client, TEST1,
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DUALTOUCH_STABILIZE_ON | DUALTOUCH_REG_ON);
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if (error)
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goto out;
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first_time = false;
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} else {
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/* generate adjustment parameter */
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err_x = (int)READ_CALIB_BUF(PRM1_X_H) << 2 |
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READ_CALIB_BUF(PRM1_X_L);
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err_y = (int)READ_CALIB_BUF(PRM1_Y_H) << 2 |
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READ_CALIB_BUF(PRM1_Y_L);
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/* X axis ajust */
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if (err_x <= 4)
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calib_x -= AXIS_ADJUST;
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else if (err_x >= 60)
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calib_x += AXIS_ADJUST;
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/* Y axis ajust */
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if (err_y <= 4)
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calib_y -= AXIS_ADJUST;
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else if (err_y >= 60)
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calib_y += AXIS_ADJUST;
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}
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/* generate calibration setting value */
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reg_x = calib_x + ((calib_x & 0x200) << 1);
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reg_y = calib_y + ((calib_y & 0x200) << 1);
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/* convert for register format */
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reg1 = reg_x >> 3;
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reg2 = (reg_y & 0x7) << 4 | (reg_x & 0x7);
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reg3 = reg_y >> 3;
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error = i2c_smbus_write_byte_data(client,
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CALIBRATION_REG1, reg1);
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if (error)
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goto out;
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error = i2c_smbus_write_byte_data(client,
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CALIBRATION_REG2, reg2);
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if (error)
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goto out;
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error = i2c_smbus_write_byte_data(client,
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CALIBRATION_REG3, reg3);
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if (error)
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goto out;
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/*
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* force calibration sequcence
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*/
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error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
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FORCE_CALIBRATION_OFF);
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if (error)
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goto out;
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error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
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FORCE_CALIBRATION_ON);
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if (error)
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goto out;
|
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|
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/* clear all interrupts */
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error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
|
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if (error)
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goto out;
|
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|
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/*
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* Wait for the status change of calibration, max 10 sampling
|
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*/
|
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calibration_done = false;
|
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for (i = 0; i < 10; i++) {
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mdelay(SAMPLING_DELAY);
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val = i2c_smbus_read_byte_data(client, TOUCH_GESTURE);
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if (!(val & CALIBRATION_MASK)) {
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calibration_done = true;
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break;
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} else if (val < 0) {
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error = val;
|
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goto out;
|
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}
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}
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|
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if (calibration_done) {
|
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val = i2c_smbus_read_byte_data(client, INT_STATUS);
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if (val == CALIBRATION_DONE) {
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success = true;
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break;
|
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} else if (val < 0) {
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error = val;
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goto out;
|
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}
|
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} else {
|
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dev_warn(dev, "calibration timeout\n");
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}
|
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}
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|
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if (!success) {
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error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1,
|
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reg1_orig);
|
|
if (error)
|
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goto out;
|
|
|
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error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2,
|
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reg2_orig);
|
|
if (error)
|
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goto out;
|
|
|
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error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3,
|
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reg3_orig);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* calibration data enable */
|
|
error = i2c_smbus_write_byte_data(client, TEST1,
|
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DUALTOUCH_STABILIZE_ON |
|
|
DUALTOUCH_REG_ON);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* wait 10 sampling */
|
|
mdelay(10 * SAMPLING_DELAY);
|
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|
|
error = -EBUSY;
|
|
}
|
|
|
|
out:
|
|
error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL);
|
|
if (!error2)
|
|
/* Clear all interrupts */
|
|
error2 = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
|
|
|
|
return error ? error : error2;
|
|
}
|
|
|
|
static const unsigned int untouch_threshold[3] = { 0, 1, 5 };
|
|
static const unsigned int single_touch_threshold[3] = { 0, 0, 4 };
|
|
static const unsigned int dual_touch_threshold[3] = { 10, 8, 0 };
|
|
|
|
static irqreturn_t rohm_ts_soft_irq(int irq, void *dev_id)
|
|
{
|
|
struct rohm_ts_data *ts = dev_id;
|
|
struct i2c_client *client = ts->client;
|
|
struct input_dev *input_dev = ts->input;
|
|
struct device *dev = &client->dev;
|
|
|
|
u8 buf[10]; /* for POS_X1_H(0x20)-TOUCH_GESTURE(0x29) */
|
|
|
|
struct input_mt_pos pos[MAX_CONTACTS];
|
|
int slots[MAX_CONTACTS];
|
|
u8 touch_flags;
|
|
unsigned int threshold;
|
|
int finger_count = -1;
|
|
int prev_finger_count = ts->finger_count;
|
|
int count;
|
|
int error;
|
|
int i;
|
|
|
|
error = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL);
|
|
if (error)
|
|
return IRQ_HANDLED;
|
|
|
|
/* Clear all interrupts */
|
|
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
|
|
if (error)
|
|
return IRQ_HANDLED;
|
|
|
|
#define READ_POS_BUF(reg) buf[((reg) - POS_X1_H)]
|
|
|
|
error = rohm_i2c_burst_read(client, POS_X1_H, buf, sizeof(buf));
|
|
if (error)
|
|
return IRQ_HANDLED;
|
|
|
|
touch_flags = READ_POS_BUF(TOUCH_GESTURE) & TOUCH_MASK;
|
|
if (touch_flags) {
|
|
/* generate coordinates */
|
|
pos[0].x = ((s16)READ_POS_BUF(POS_X1_H) << 2) |
|
|
READ_POS_BUF(POS_X1_L);
|
|
pos[0].y = ((s16)READ_POS_BUF(POS_Y1_H) << 2) |
|
|
READ_POS_BUF(POS_Y1_L);
|
|
pos[1].x = ((s16)READ_POS_BUF(POS_X2_H) << 2) |
|
|
READ_POS_BUF(POS_X2_L);
|
|
pos[1].y = ((s16)READ_POS_BUF(POS_Y2_H) << 2) |
|
|
READ_POS_BUF(POS_Y2_L);
|
|
}
|
|
|
|
switch (touch_flags) {
|
|
case 0:
|
|
threshold = untouch_threshold[prev_finger_count];
|
|
if (++ts->contact_count[0] >= threshold)
|
|
finger_count = 0;
|
|
break;
|
|
|
|
case SINGLE_TOUCH:
|
|
threshold = single_touch_threshold[prev_finger_count];
|
|
if (++ts->contact_count[1] >= threshold)
|
|
finger_count = 1;
|
|
|
|
if (finger_count == 1) {
|
|
if (pos[1].x != 0 && pos[1].y != 0) {
|
|
pos[0].x = pos[1].x;
|
|
pos[0].y = pos[1].y;
|
|
pos[1].x = 0;
|
|
pos[1].y = 0;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case DUAL_TOUCH:
|
|
threshold = dual_touch_threshold[prev_finger_count];
|
|
if (++ts->contact_count[2] >= threshold)
|
|
finger_count = 2;
|
|
break;
|
|
|
|
default:
|
|
dev_dbg(dev,
|
|
"Three or more touches are not supported\n");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
if (finger_count >= 0) {
|
|
if (prev_finger_count != finger_count) {
|
|
count = ts->contact_count[finger_count];
|
|
memset(ts->contact_count, 0, sizeof(ts->contact_count));
|
|
ts->contact_count[finger_count] = count;
|
|
}
|
|
|
|
input_mt_assign_slots(input_dev, slots, pos,
|
|
finger_count, ROHM_TS_DISPLACEMENT_MAX);
|
|
|
|
for (i = 0; i < finger_count; i++) {
|
|
input_mt_slot(input_dev, slots[i]);
|
|
input_mt_report_slot_state(input_dev,
|
|
MT_TOOL_FINGER, true);
|
|
input_report_abs(input_dev,
|
|
ABS_MT_POSITION_X, pos[i].x);
|
|
input_report_abs(input_dev,
|
|
ABS_MT_POSITION_Y, pos[i].y);
|
|
}
|
|
|
|
input_mt_sync_frame(input_dev);
|
|
input_mt_report_pointer_emulation(input_dev, true);
|
|
input_sync(input_dev);
|
|
|
|
ts->finger_count = finger_count;
|
|
}
|
|
|
|
if (READ_POS_BUF(TOUCH_GESTURE) & CALIBRATION_REQUEST) {
|
|
error = rohm_ts_manual_calibration(ts);
|
|
if (error)
|
|
dev_warn(dev, "manual calibration failed: %d\n",
|
|
error);
|
|
}
|
|
|
|
i2c_smbus_write_byte_data(client, INT_MASK,
|
|
CALIBRATION_DONE | SLEEP_OUT | SLEEP_IN |
|
|
PROGRAM_LOAD_DONE);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int rohm_ts_load_firmware(struct i2c_client *client,
|
|
const char *firmware_name)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
const struct firmware *fw;
|
|
s32 status;
|
|
unsigned int offset, len, xfer_len;
|
|
unsigned int retry = 0;
|
|
int error, error2;
|
|
|
|
error = request_firmware(&fw, firmware_name, dev);
|
|
if (error) {
|
|
dev_err(dev, "unable to retrieve firmware %s: %d\n",
|
|
firmware_name, error);
|
|
return error;
|
|
}
|
|
|
|
error = i2c_smbus_write_byte_data(client, INT_MASK,
|
|
COORD_UPDATE | CALIBRATION_DONE |
|
|
SLEEP_IN | SLEEP_OUT);
|
|
if (error)
|
|
goto out;
|
|
|
|
do {
|
|
if (retry) {
|
|
dev_warn(dev, "retrying firmware load\n");
|
|
|
|
/* settings for retry */
|
|
error = i2c_smbus_write_byte_data(client, EX_WDAT, 0);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
|
|
error = i2c_smbus_write_byte_data(client, EX_ADDR_H, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = i2c_smbus_write_byte_data(client, EX_ADDR_L, 0);
|
|
if (error)
|
|
goto out;
|
|
|
|
error = i2c_smbus_write_byte_data(client, COMMON_SETUP1,
|
|
COMMON_SETUP1_DEFAULT);
|
|
if (error)
|
|
goto out;
|
|
|
|
/* firmware load to the device */
|
|
offset = 0;
|
|
len = fw->size;
|
|
|
|
while (len) {
|
|
xfer_len = min(FIRMWARE_BLOCK_SIZE, len);
|
|
|
|
error = i2c_smbus_write_i2c_block_data(client, EX_WDAT,
|
|
xfer_len, &fw->data[offset]);
|
|
if (error)
|
|
goto out;
|
|
|
|
len -= xfer_len;
|
|
offset += xfer_len;
|
|
}
|
|
|
|
/* check firmware load result */
|
|
status = i2c_smbus_read_byte_data(client, INT_STATUS);
|
|
if (status < 0) {
|
|
error = status;
|
|
goto out;
|
|
}
|
|
|
|
/* clear all interrupts */
|
|
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (status == PROGRAM_LOAD_DONE)
|
|
break;
|
|
|
|
error = -EIO;
|
|
} while (++retry <= FIRMWARE_RETRY_MAX);
|
|
|
|
out:
|
|
error2 = i2c_smbus_write_byte_data(client, INT_MASK, INT_ALL);
|
|
|
|
release_firmware(fw);
|
|
|
|
return error ? error : error2;
|
|
}
|
|
|
|
static ssize_t swap_xy_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rohm_ts_data *ts = i2c_get_clientdata(client);
|
|
|
|
return sprintf(buf, "%d\n", !!(ts->setup2 & SWAP_XY));
|
|
}
|
|
|
|
static ssize_t swap_xy_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rohm_ts_data *ts = i2c_get_clientdata(client);
|
|
unsigned int val;
|
|
int error;
|
|
|
|
error = kstrtouint(buf, 0, &val);
|
|
if (error)
|
|
return error;
|
|
|
|
error = mutex_lock_interruptible(&ts->input->mutex);
|
|
if (error)
|
|
return error;
|
|
|
|
if (val)
|
|
ts->setup2 |= SWAP_XY;
|
|
else
|
|
ts->setup2 &= ~SWAP_XY;
|
|
|
|
if (ts->initialized)
|
|
error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2,
|
|
ts->setup2);
|
|
|
|
mutex_unlock(&ts->input->mutex);
|
|
|
|
return error ? error : count;
|
|
}
|
|
|
|
static ssize_t inv_x_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rohm_ts_data *ts = i2c_get_clientdata(client);
|
|
|
|
return sprintf(buf, "%d\n", !!(ts->setup2 & INV_X));
|
|
}
|
|
|
|
static ssize_t inv_x_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rohm_ts_data *ts = i2c_get_clientdata(client);
|
|
unsigned int val;
|
|
int error;
|
|
|
|
error = kstrtouint(buf, 0, &val);
|
|
if (error)
|
|
return error;
|
|
|
|
error = mutex_lock_interruptible(&ts->input->mutex);
|
|
if (error)
|
|
return error;
|
|
|
|
if (val)
|
|
ts->setup2 |= INV_X;
|
|
else
|
|
ts->setup2 &= ~INV_X;
|
|
|
|
if (ts->initialized)
|
|
error = i2c_smbus_write_byte_data(ts->client, COMMON_SETUP2,
|
|
ts->setup2);
|
|
|
|
mutex_unlock(&ts->input->mutex);
|
|
|
|
return error ? error : count;
|
|
}
|
|
|
|
static ssize_t inv_y_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rohm_ts_data *ts = i2c_get_clientdata(client);
|
|
|
|
return sprintf(buf, "%d\n", !!(ts->setup2 & INV_Y));
|
|
}
|
|
|
|
static ssize_t inv_y_store(struct device *dev, struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct rohm_ts_data *ts = i2c_get_clientdata(client);
|
|
unsigned int val;
|
|
int error;
|
|
|
|
error = kstrtouint(buf, 0, &val);
|
|
if (error)
|
|
return error;
|
|
|
|
error = mutex_lock_interruptible(&ts->input->mutex);
|
|
if (error)
|
|
return error;
|
|
|
|
if (val)
|
|
ts->setup2 |= INV_Y;
|
|
else
|
|
ts->setup2 &= ~INV_Y;
|
|
|
|
if (ts->initialized)
|
|
error = i2c_smbus_write_byte_data(client, COMMON_SETUP2,
|
|
ts->setup2);
|
|
|
|
mutex_unlock(&ts->input->mutex);
|
|
|
|
return error ? error : count;
|
|
}
|
|
|
|
static DEVICE_ATTR_RW(swap_xy);
|
|
static DEVICE_ATTR_RW(inv_x);
|
|
static DEVICE_ATTR_RW(inv_y);
|
|
|
|
static struct attribute *rohm_ts_attrs[] = {
|
|
&dev_attr_swap_xy.attr,
|
|
&dev_attr_inv_x.attr,
|
|
&dev_attr_inv_y.attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct attribute_group rohm_ts_attr_group = {
|
|
.attrs = rohm_ts_attrs,
|
|
};
|
|
|
|
static int rohm_ts_device_init(struct i2c_client *client, u8 setup2)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
int error;
|
|
|
|
disable_irq(client->irq);
|
|
|
|
/*
|
|
* Wait 200usec for reset
|
|
*/
|
|
udelay(200);
|
|
|
|
/* Release analog reset */
|
|
error = i2c_smbus_write_byte_data(client, SYSTEM,
|
|
ANALOG_POWER_ON | CPU_POWER_OFF);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Waiting for the analog warm-up, max. 200usec */
|
|
udelay(200);
|
|
|
|
/* clear all interrupts */
|
|
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, EX_WDAT, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, COMMON_SETUP1, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, COMMON_SETUP2, setup2);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, COMMON_SETUP3,
|
|
SEL_TBL_DEFAULT | EN_MULTI);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, THRESHOLD_GESTURE,
|
|
THRESHOLD_GESTURE_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, INTERVAL_TIME,
|
|
INTERVAL_TIME_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, CPU_FREQ, CPU_FREQ_10MHZ);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, PRM_SWOFF_TIME,
|
|
PRM_SWOFF_TIME_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, ADC_CTRL, ADC_DIV_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, ADC_WAIT, ADC_WAIT_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Panel setup, these values change with the panel.
|
|
*/
|
|
error = i2c_smbus_write_byte_data(client, STEP_X, STEP_X_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, STEP_Y, STEP_Y_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, OFFSET_X, OFFSET_X_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, OFFSET_Y, OFFSET_Y_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, THRESHOLD_TOUCH,
|
|
THRESHOLD_TOUCH_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, EVR_XY, EVR_XY_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, EVR_X, EVR_X_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, EVR_Y, EVR_Y_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Fixed value settings */
|
|
error = i2c_smbus_write_byte_data(client, CALIBRATION_ADJUST,
|
|
CALIBRATION_ADJUST_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, SWCONT, SWCONT_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, TEST1,
|
|
DUALTOUCH_STABILIZE_ON |
|
|
DUALTOUCH_REG_ON);
|
|
if (error)
|
|
return error;
|
|
|
|
error = rohm_ts_load_firmware(client, BU21023_FIRMWARE_NAME);
|
|
if (error) {
|
|
dev_err(dev, "failed to load firmware: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Manual calibration results are not changed in same environment.
|
|
* If the force calibration is performed,
|
|
* the controller will not require calibration request interrupt
|
|
* when the typical values are set to the calibration registers.
|
|
*/
|
|
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG1,
|
|
CALIBRATION_REG1_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG2,
|
|
CALIBRATION_REG2_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, CALIBRATION_REG3,
|
|
CALIBRATION_REG3_DEFAULT);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
|
|
FORCE_CALIBRATION_OFF);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, FORCE_CALIBRATION,
|
|
FORCE_CALIBRATION_ON);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Clear all interrupts */
|
|
error = i2c_smbus_write_byte_data(client, INT_CLEAR, 0xff);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Enable coordinates update interrupt */
|
|
error = i2c_smbus_write_byte_data(client, INT_MASK,
|
|
CALIBRATION_DONE | SLEEP_OUT |
|
|
SLEEP_IN | PROGRAM_LOAD_DONE);
|
|
if (error)
|
|
return error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, ERR_MASK,
|
|
PROGRAM_LOAD_ERR | CPU_TIMEOUT |
|
|
ADC_TIMEOUT);
|
|
if (error)
|
|
return error;
|
|
|
|
/* controller CPU power on */
|
|
error = i2c_smbus_write_byte_data(client, SYSTEM,
|
|
ANALOG_POWER_ON | CPU_POWER_ON);
|
|
|
|
enable_irq(client->irq);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int rohm_ts_power_off(struct i2c_client *client)
|
|
{
|
|
int error;
|
|
|
|
error = i2c_smbus_write_byte_data(client, SYSTEM,
|
|
ANALOG_POWER_ON | CPU_POWER_OFF);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"failed to power off device CPU: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = i2c_smbus_write_byte_data(client, SYSTEM,
|
|
ANALOG_POWER_OFF | CPU_POWER_OFF);
|
|
if (error)
|
|
dev_err(&client->dev,
|
|
"failed to power off the device: %d\n", error);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int rohm_ts_open(struct input_dev *input_dev)
|
|
{
|
|
struct rohm_ts_data *ts = input_get_drvdata(input_dev);
|
|
struct i2c_client *client = ts->client;
|
|
int error;
|
|
|
|
if (!ts->initialized) {
|
|
error = rohm_ts_device_init(client, ts->setup2);
|
|
if (error) {
|
|
dev_err(&client->dev,
|
|
"device initialization failed: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
ts->initialized = true;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rohm_ts_close(struct input_dev *input_dev)
|
|
{
|
|
struct rohm_ts_data *ts = input_get_drvdata(input_dev);
|
|
|
|
rohm_ts_power_off(ts->client);
|
|
|
|
ts->initialized = false;
|
|
}
|
|
|
|
static void rohm_ts_remove_sysfs_group(void *_dev)
|
|
{
|
|
struct device *dev = _dev;
|
|
|
|
sysfs_remove_group(&dev->kobj, &rohm_ts_attr_group);
|
|
}
|
|
|
|
static int rohm_bu21023_i2c_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct rohm_ts_data *ts;
|
|
struct input_dev *input;
|
|
int error;
|
|
|
|
if (!client->irq) {
|
|
dev_err(dev, "IRQ is not assigned\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!client->adapter->algo->master_xfer) {
|
|
dev_err(dev, "I2C level transfers not supported\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
/* Turn off CPU just in case */
|
|
error = rohm_ts_power_off(client);
|
|
if (error)
|
|
return error;
|
|
|
|
ts = devm_kzalloc(dev, sizeof(struct rohm_ts_data), GFP_KERNEL);
|
|
if (!ts)
|
|
return -ENOMEM;
|
|
|
|
ts->client = client;
|
|
ts->setup2 = MAF_1SAMPLE;
|
|
i2c_set_clientdata(client, ts);
|
|
|
|
input = devm_input_allocate_device(dev);
|
|
if (!input)
|
|
return -ENOMEM;
|
|
|
|
input->name = BU21023_NAME;
|
|
input->id.bustype = BUS_I2C;
|
|
input->open = rohm_ts_open;
|
|
input->close = rohm_ts_close;
|
|
|
|
ts->input = input;
|
|
input_set_drvdata(input, ts);
|
|
|
|
input_set_abs_params(input, ABS_MT_POSITION_X,
|
|
ROHM_TS_ABS_X_MIN, ROHM_TS_ABS_X_MAX, 0, 0);
|
|
input_set_abs_params(input, ABS_MT_POSITION_Y,
|
|
ROHM_TS_ABS_Y_MIN, ROHM_TS_ABS_Y_MAX, 0, 0);
|
|
|
|
error = input_mt_init_slots(input, MAX_CONTACTS,
|
|
INPUT_MT_DIRECT | INPUT_MT_TRACK |
|
|
INPUT_MT_DROP_UNUSED);
|
|
if (error) {
|
|
dev_err(dev, "failed to multi touch slots initialization\n");
|
|
return error;
|
|
}
|
|
|
|
error = devm_request_threaded_irq(dev, client->irq,
|
|
NULL, rohm_ts_soft_irq,
|
|
IRQF_ONESHOT, client->name, ts);
|
|
if (error) {
|
|
dev_err(dev, "failed to request IRQ: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = input_register_device(input);
|
|
if (error) {
|
|
dev_err(dev, "failed to register input device: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = sysfs_create_group(&dev->kobj, &rohm_ts_attr_group);
|
|
if (error) {
|
|
dev_err(dev, "failed to create sysfs group: %d\n", error);
|
|
return error;
|
|
}
|
|
|
|
error = devm_add_action(dev, rohm_ts_remove_sysfs_group, dev);
|
|
if (error) {
|
|
rohm_ts_remove_sysfs_group(dev);
|
|
dev_err(&client->dev,
|
|
"Failed to add sysfs cleanup action: %d\n",
|
|
error);
|
|
return error;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
static const struct i2c_device_id rohm_bu21023_i2c_id[] = {
|
|
{ BU21023_NAME, 0 },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, rohm_bu21023_i2c_id);
|
|
|
|
static struct i2c_driver rohm_bu21023_i2c_driver = {
|
|
.driver = {
|
|
.name = BU21023_NAME,
|
|
},
|
|
.probe = rohm_bu21023_i2c_probe,
|
|
.id_table = rohm_bu21023_i2c_id,
|
|
};
|
|
module_i2c_driver(rohm_bu21023_i2c_driver);
|
|
|
|
MODULE_DESCRIPTION("ROHM BU21023/24 Touchscreen driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_AUTHOR("ROHM Co., Ltd.");
|