// SPDX-License-Identifier: GPL-2.0-only /* * ROHM BU21023/24 Dual touch support resistive touch screen driver * Copyright (C) 2012 ROHM CO.,LTD. */ #include <linux/delay.h> #include <linux/firmware.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/input/mt.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/slab.h> #define BU21023_NAME … #define BU21023_FIRMWARE_NAME … #define MAX_CONTACTS … #define AXIS_ADJUST … #define AXIS_OFFSET … #define FIRMWARE_BLOCK_SIZE … #define FIRMWARE_RETRY_MAX … #define SAMPLING_DELAY … #define CALIBRATION_RETRY_MAX … #define ROHM_TS_ABS_X_MIN … #define ROHM_TS_ABS_X_MAX … #define ROHM_TS_ABS_Y_MIN … #define ROHM_TS_ABS_Y_MAX … #define ROHM_TS_DISPLACEMENT_MAX … /* * BU21023GUL/BU21023MUV/BU21024FV-M registers map */ #define VADOUT_YP_H … #define VADOUT_YP_L … #define VADOUT_XP_H … #define VADOUT_XP_L … #define VADOUT_YN_H … #define VADOUT_YN_L … #define VADOUT_XN_H … #define VADOUT_XN_L … #define PRM1_X_H … #define PRM1_X_L … #define PRM1_Y_H … #define PRM1_Y_L … #define PRM2_X_H … #define PRM2_X_L … #define PRM2_Y_H … #define PRM2_Y_L … #define MLT_PRM_MONI_X … #define MLT_PRM_MONI_Y … #define DEBUG_MONI_1 … #define DEBUG_MONI_2 … #define VADOUT_ZX_H … #define VADOUT_ZX_L … #define VADOUT_ZY_H … #define VADOUT_ZY_L … #define Z_PARAM_H … #define Z_PARAM_L … /* * Value for VADOUT_*_L */ #define VADOUT_L_MASK … /* * Value for PRM*_*_L */ #define PRM_L_MASK … #define POS_X1_H … #define POS_X1_L … #define POS_Y1_H … #define POS_Y1_L … #define POS_X2_H … #define POS_X2_L … #define POS_Y2_H … #define POS_Y2_L … /* * Value for POS_*_L */ #define POS_L_MASK … #define TOUCH … #define TOUCH_DETECT … #define TOUCH_GESTURE … #define SINGLE_TOUCH … #define DUAL_TOUCH … #define TOUCH_MASK … #define CALIBRATION_REQUEST … #define CALIBRATION_STATUS … #define CALIBRATION_MASK … #define GESTURE_SPREAD … #define GESTURE_PINCH … #define GESTURE_ROTATE_R … #define GESTURE_ROTATE_L … #define INT_STATUS … #define INT_MASK … #define INT_CLEAR … /* * Values for INT_* */ #define COORD_UPDATE … #define CALIBRATION_DONE … #define SLEEP_IN … #define SLEEP_OUT … #define PROGRAM_LOAD_DONE … #define ERROR … #define INT_ALL … #define ERR_STATUS … #define ERR_MASK … /* * Values for ERR_* */ #define ADC_TIMEOUT … #define CPU_TIMEOUT … #define CALIBRATION_ERR … #define PROGRAM_LOAD_ERR … #define COMMON_SETUP1 … #define PROGRAM_LOAD_HOST … #define PROGRAM_LOAD_EEPROM … #define CENSOR_4PORT … #define CENSOR_8PORT … #define CALIBRATION_TYPE_DEFAULT … #define CALIBRATION_TYPE_SPECIAL … #define INT_ACTIVE_HIGH … #define INT_ACTIVE_LOW … #define AUTO_CALIBRATION … #define MANUAL_CALIBRATION … #define COMMON_SETUP1_DEFAULT … #define COMMON_SETUP2 … #define MAF_NONE … #define MAF_1SAMPLE … #define MAF_3SAMPLES … #define MAF_5SAMPLES … #define INV_Y … #define INV_X … #define SWAP_XY … #define COMMON_SETUP3 … #define EN_SLEEP … #define EN_MULTI … #define EN_GESTURE … #define EN_INTVL … #define SEL_STEP … #define SEL_MULTI … #define SEL_TBL_DEFAULT … #define INTERVAL_TIME … #define INTERVAL_TIME_DEFAULT … #define STEP_X … #define STEP_X_DEFAULT … #define STEP_Y … #define STEP_Y_DEFAULT … #define OFFSET_X … #define OFFSET_X_DEFAULT … #define OFFSET_Y … #define OFFSET_Y_DEFAULT … #define THRESHOLD_TOUCH … #define THRESHOLD_TOUCH_DEFAULT … #define THRESHOLD_GESTURE … #define THRESHOLD_GESTURE_DEFAULT … #define SYSTEM … #define ANALOG_POWER_ON … #define ANALOG_POWER_OFF … #define CPU_POWER_ON … #define CPU_POWER_OFF … #define FORCE_CALIBRATION … #define FORCE_CALIBRATION_ON … #define FORCE_CALIBRATION_OFF … #define CPU_FREQ … #define CPU_FREQ_10MHZ … #define CPU_FREQ_5MHZ … #define CPU_FREQ_1MHZ … #define EEPROM_ADDR … #define CALIBRATION_ADJUST … #define CALIBRATION_ADJUST_DEFAULT … #define THRESHOLD_SLEEP_IN … #define EVR_XY … #define EVR_XY_DEFAULT … #define PRM_SWOFF_TIME … #define PRM_SWOFF_TIME_DEFAULT … #define PROGRAM_VERSION … #define ADC_CTRL … #define ADC_DIV_MASK … #define ADC_DIV_DEFAULT … #define ADC_WAIT … #define ADC_WAIT_DEFAULT … #define SWCONT … #define SWCONT_DEFAULT … #define EVR_X … #define EVR_X_DEFAULT … #define EVR_Y … #define EVR_Y_DEFAULT … #define TEST1 … #define DUALTOUCH_STABILIZE_ON … #define DUALTOUCH_STABILIZE_OFF … #define DUALTOUCH_REG_ON … #define DUALTOUCH_REG_OFF … #define CALIBRATION_REG1 … #define CALIBRATION_REG1_DEFAULT … #define CALIBRATION_REG2 … #define CALIBRATION_REG2_DEFAULT … #define CALIBRATION_REG3 … #define CALIBRATION_REG3_DEFAULT … #define EX_ADDR_H … #define EX_ADDR_L … #define EX_WDAT … #define EX_RDAT … #define EX_CHK_SUM1 … #define EX_CHK_SUM2 … #define EX_CHK_SUM3 … struct rohm_ts_data { … }; /* * rohm_i2c_burst_read - execute combined I2C message for ROHM BU21023/24 * @client: Handle to ROHM BU21023/24 * @start: Where to start read address from ROHM BU21023/24 * @buf: Where to store read data from ROHM BU21023/24 * @len: How many bytes to read * * Returns negative errno, else zero on success. * * Note * In BU21023/24 burst read, stop condition is needed after "address write". * Therefore, transmission is performed in 2 steps. */ static int rohm_i2c_burst_read(struct i2c_client *client, u8 start, void *buf, size_t len) { … } static int rohm_ts_manual_calibration(struct rohm_ts_data *ts) { … } static const unsigned int untouch_threshold[3] = …; static const unsigned int single_touch_threshold[3] = …; static const unsigned int dual_touch_threshold[3] = …; static irqreturn_t rohm_ts_soft_irq(int irq, void *dev_id) { … } static int rohm_ts_load_firmware(struct i2c_client *client, const char *firmware_name) { … } static int rohm_ts_update_setting(struct rohm_ts_data *ts, unsigned int setting_bit, bool on) { … } static ssize_t swap_xy_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t swap_xy_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t inv_x_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t inv_x_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t inv_y_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t inv_y_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t 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[] = …; ATTRIBUTE_GROUPS(…); static int rohm_ts_device_init(struct i2c_client *client, u8 setup2) { … } static int rohm_ts_power_off(struct i2c_client *client) { … } static int rohm_ts_open(struct input_dev *input_dev) { … } static void rohm_ts_close(struct input_dev *input_dev) { … } static int rohm_bu21023_i2c_probe(struct i2c_client *client) { … } static const struct i2c_device_id rohm_bu21023_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, rohm_bu21023_i2c_id); static struct i2c_driver rohm_bu21023_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …;
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