^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) ST-Ericsson SA 2010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/input/touchscreen.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/property.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/regulator/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define MAX_FINGERS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define RESET_DELAY 30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define PENUP_TIMEOUT (10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #define DELTA_MIN 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define MASK_BITS 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define SHIFT_8 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define SHIFT_2 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define LENGTH_OF_BUFFER 11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define I2C_RETRY_COUNT 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define BU21013_SENSORS_BTN_0_7_REG 0x70
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define BU21013_SENSORS_BTN_8_15_REG 0x71
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define BU21013_SENSORS_BTN_16_23_REG 0x72
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define BU21013_X1_POS_MSB_REG 0x73
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define BU21013_X1_POS_LSB_REG 0x74
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #define BU21013_Y1_POS_MSB_REG 0x75
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define BU21013_Y1_POS_LSB_REG 0x76
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define BU21013_X2_POS_MSB_REG 0x77
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define BU21013_X2_POS_LSB_REG 0x78
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #define BU21013_Y2_POS_MSB_REG 0x79
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define BU21013_Y2_POS_LSB_REG 0x7A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #define BU21013_INT_CLR_REG 0xE8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define BU21013_INT_MODE_REG 0xE9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define BU21013_GAIN_REG 0xEA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define BU21013_OFFSET_MODE_REG 0xEB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define BU21013_XY_EDGE_REG 0xEC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define BU21013_RESET_REG 0xED
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define BU21013_CALIB_REG 0xEE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define BU21013_DONE_REG 0xEF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define BU21013_SENSOR_0_7_REG 0xF0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #define BU21013_SENSOR_8_15_REG 0xF1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define BU21013_SENSOR_16_23_REG 0xF2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) #define BU21013_POS_MODE1_REG 0xF3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define BU21013_POS_MODE2_REG 0xF4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define BU21013_CLK_MODE_REG 0xF5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define BU21013_IDLE_REG 0xFA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define BU21013_FILTER_REG 0xFB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define BU21013_TH_ON_REG 0xFC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define BU21013_TH_OFF_REG 0xFD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) #define BU21013_RESET_ENABLE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define BU21013_SENSORS_EN_0_7 0x3F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define BU21013_SENSORS_EN_8_15 0xFC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define BU21013_SENSORS_EN_16_23 0x1F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define BU21013_POS_MODE1_0 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define BU21013_POS_MODE1_1 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define BU21013_POS_MODE1_2 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define BU21013_POS_MODE2_ZERO 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define BU21013_POS_MODE2_AVG1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define BU21013_POS_MODE2_AVG2 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define BU21013_POS_MODE2_EN_XY 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define BU21013_POS_MODE2_EN_RAW 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) #define BU21013_POS_MODE2_MULTI 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) #define BU21013_CLK_MODE_DIV 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) #define BU21013_CLK_MODE_EXT 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define BU21013_CLK_MODE_CALIB 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define BU21013_IDLET_0 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define BU21013_IDLET_1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define BU21013_IDLET_2 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define BU21013_IDLET_3 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define BU21013_IDLE_INTERMIT_EN 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define BU21013_DELTA_0_6 0x7F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define BU21013_FILTER_EN 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #define BU21013_INT_MODE_LEVEL 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) #define BU21013_INT_MODE_EDGE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define BU21013_GAIN_0 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) #define BU21013_GAIN_1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #define BU21013_GAIN_2 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #define BU21013_OFFSET_MODE_DEFAULT 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) #define BU21013_OFFSET_MODE_MOVE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) #define BU21013_OFFSET_MODE_DISABLE 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) #define BU21013_TH_ON_0 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #define BU21013_TH_ON_1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #define BU21013_TH_ON_2 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define BU21013_TH_ON_3 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define BU21013_TH_ON_4 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define BU21013_TH_ON_5 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define BU21013_TH_ON_6 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define BU21013_TH_ON_7 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define BU21013_TH_ON_MAX 0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define BU21013_TH_OFF_0 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define BU21013_TH_OFF_1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define BU21013_TH_OFF_2 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define BU21013_TH_OFF_3 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define BU21013_TH_OFF_4 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define BU21013_TH_OFF_5 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define BU21013_TH_OFF_6 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define BU21013_TH_OFF_7 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #define BU21013_TH_OFF_MAX 0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) #define BU21013_X_EDGE_0 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #define BU21013_X_EDGE_1 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) #define BU21013_X_EDGE_2 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #define BU21013_X_EDGE_3 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) #define BU21013_Y_EDGE_0 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #define BU21013_Y_EDGE_1 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #define BU21013_Y_EDGE_2 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #define BU21013_Y_EDGE_3 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) #define BU21013_DONE 0x01
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #define BU21013_NUMBER_OF_X_SENSORS (6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #define BU21013_NUMBER_OF_Y_SENSORS (11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #define DRIVER_TP "bu21013_tp"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) * struct bu21013_ts - touch panel data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) * @client: pointer to the i2c client
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) * @in_dev: pointer to the input device structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * @props: the device coordinate transformation properties
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) * @regulator: pointer to the Regulator used for touch screen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) * @cs_gpiod: chip select GPIO line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * @int_gpiod: touch interrupt GPIO line
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * @touch_x_max: maximum X coordinate reported by the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * @touch_y_max: maximum Y coordinate reported by the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * @x_flip: indicates that the driver should invert X coordinate before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * reporting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) * @y_flip: indicates that the driver should invert Y coordinate before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) * reporting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) * @touch_stopped: touch stop flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) * Touch panel device data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) struct bu21013_ts {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) struct input_dev *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) struct touchscreen_properties props;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) struct regulator *regulator;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) struct gpio_desc *cs_gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) struct gpio_desc *int_gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) u32 touch_x_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) u32 touch_y_max;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) bool x_flip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) bool y_flip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) bool touch_stopped;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int bu21013_read_block_data(struct bu21013_ts *ts, u8 *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) for (i = 0; i < I2C_RETRY_COUNT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) ret = i2c_smbus_read_i2c_block_data(ts->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) BU21013_SENSORS_BTN_0_7_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) LENGTH_OF_BUFFER, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (ret == LENGTH_OF_BUFFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) static int bu21013_do_touch_report(struct bu21013_ts *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) struct input_dev *input = ts->in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) struct input_mt_pos pos[MAX_FINGERS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) int slots[MAX_FINGERS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) u8 buf[LENGTH_OF_BUFFER];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) bool has_x_sensors, has_y_sensors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) int finger_down_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (bu21013_read_block_data(ts, buf) < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) has_x_sensors = hweight32(buf[0] & BU21013_SENSORS_EN_0_7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) has_y_sensors = hweight32(((buf[1] & BU21013_SENSORS_EN_8_15) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) ((buf[2] & BU21013_SENSORS_EN_16_23) << SHIFT_8)) >> SHIFT_2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) if (!has_x_sensors || !has_y_sensors)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) for (i = 0; i < MAX_FINGERS; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) const u8 *data = &buf[4 * i + 3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) unsigned int x, y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) x = data[0] << SHIFT_2 | (data[1] & MASK_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) y = data[2] << SHIFT_2 | (data[3] & MASK_BITS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (x != 0 && y != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) touchscreen_set_mt_pos(&pos[finger_down_count++],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) &ts->props, x, y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (finger_down_count == 2 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) (abs(pos[0].x - pos[1].x) < DELTA_MIN ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) abs(pos[0].y - pos[1].y) < DELTA_MIN)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) input_mt_assign_slots(input, slots, pos, finger_down_count, DELTA_MIN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) for (i = 0; i < finger_down_count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) input_mt_slot(input, slots[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) input_report_abs(input, ABS_MT_POSITION_X, pos[i].x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) input_report_abs(input, ABS_MT_POSITION_Y, pos[i].y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) input_mt_sync_frame(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) input_sync(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static irqreturn_t bu21013_gpio_irq(int irq, void *device_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct bu21013_ts *ts = device_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) int keep_polling;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) error = bu21013_do_touch_report(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) dev_err(&ts->client->dev, "%s failed\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (unlikely(ts->touch_stopped))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) keep_polling = ts->int_gpiod ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) gpiod_get_value(ts->int_gpiod) : false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (keep_polling)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) usleep_range(2000, 2500);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) } while (keep_polling);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int bu21013_init_chip(struct bu21013_ts *ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) struct i2c_client *client = ts->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) error = i2c_smbus_write_byte_data(client, BU21013_RESET_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) BU21013_RESET_ENABLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) dev_err(&client->dev, "BU21013_RESET reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) msleep(RESET_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) error = i2c_smbus_write_byte_data(client, BU21013_SENSOR_0_7_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) BU21013_SENSORS_EN_0_7);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) dev_err(&client->dev, "BU21013_SENSOR_0_7 reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) error = i2c_smbus_write_byte_data(client, BU21013_SENSOR_8_15_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) BU21013_SENSORS_EN_8_15);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dev_err(&client->dev, "BU21013_SENSOR_8_15 reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) error = i2c_smbus_write_byte_data(client, BU21013_SENSOR_16_23_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) BU21013_SENSORS_EN_16_23);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) dev_err(&client->dev, "BU21013_SENSOR_16_23 reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) error = i2c_smbus_write_byte_data(client, BU21013_POS_MODE1_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) BU21013_POS_MODE1_0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) BU21013_POS_MODE1_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) dev_err(&client->dev, "BU21013_POS_MODE1 reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) error = i2c_smbus_write_byte_data(client, BU21013_POS_MODE2_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) BU21013_POS_MODE2_ZERO |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) BU21013_POS_MODE2_AVG1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) BU21013_POS_MODE2_AVG2 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) BU21013_POS_MODE2_EN_RAW |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) BU21013_POS_MODE2_MULTI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) dev_err(&client->dev, "BU21013_POS_MODE2 reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) error = i2c_smbus_write_byte_data(client, BU21013_CLK_MODE_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) BU21013_CLK_MODE_DIV |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) BU21013_CLK_MODE_CALIB);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) dev_err(&client->dev, "BU21013_CLK_MODE reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) error = i2c_smbus_write_byte_data(client, BU21013_IDLE_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) BU21013_IDLET_0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) BU21013_IDLE_INTERMIT_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) dev_err(&client->dev, "BU21013_IDLE reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) error = i2c_smbus_write_byte_data(client, BU21013_INT_MODE_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) BU21013_INT_MODE_LEVEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) dev_err(&client->dev, "BU21013_INT_MODE reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) error = i2c_smbus_write_byte_data(client, BU21013_FILTER_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) BU21013_DELTA_0_6 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) BU21013_FILTER_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) dev_err(&client->dev, "BU21013_FILTER reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) error = i2c_smbus_write_byte_data(client, BU21013_TH_ON_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) BU21013_TH_ON_5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) dev_err(&client->dev, "BU21013_TH_ON reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) error = i2c_smbus_write_byte_data(client, BU21013_TH_OFF_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) BU21013_TH_OFF_4 | BU21013_TH_OFF_3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) dev_err(&client->dev, "BU21013_TH_OFF reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) error = i2c_smbus_write_byte_data(client, BU21013_GAIN_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) BU21013_GAIN_0 | BU21013_GAIN_1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) dev_err(&client->dev, "BU21013_GAIN reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) error = i2c_smbus_write_byte_data(client, BU21013_OFFSET_MODE_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) BU21013_OFFSET_MODE_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) dev_err(&client->dev, "BU21013_OFFSET_MODE reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) error = i2c_smbus_write_byte_data(client, BU21013_XY_EDGE_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) BU21013_X_EDGE_0 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) BU21013_X_EDGE_2 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) BU21013_Y_EDGE_1 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) BU21013_Y_EDGE_3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) dev_err(&client->dev, "BU21013_XY_EDGE reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) error = i2c_smbus_write_byte_data(client, BU21013_DONE_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) BU21013_DONE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) dev_err(&client->dev, "BU21013_REG_DONE reg write failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) static void bu21013_power_off(void *_ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) struct bu21013_ts *ts = _ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) regulator_disable(ts->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) static void bu21013_disable_chip(void *_ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) struct bu21013_ts *ts = _ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) gpiod_set_value(ts->cs_gpiod, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static int bu21013_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) struct bu21013_ts *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) struct input_dev *in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) struct input_absinfo *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) u32 max_x = 0, max_y = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (!i2c_check_functionality(client->adapter,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) I2C_FUNC_SMBUS_BYTE_DATA)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) dev_err(&client->dev, "i2c smbus byte data not supported\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!client->irq) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) dev_err(&client->dev, "No IRQ set up\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (!ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) ts->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) ts->x_flip = device_property_read_bool(&client->dev, "rohm,flip-x");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) ts->y_flip = device_property_read_bool(&client->dev, "rohm,flip-y");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) in_dev = devm_input_allocate_device(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (!in_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) dev_err(&client->dev, "device memory alloc failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) ts->in_dev = in_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) input_set_drvdata(in_dev, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* register the device to input subsystem */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) in_dev->name = DRIVER_TP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) in_dev->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) device_property_read_u32(&client->dev, "rohm,touch-max-x", &max_x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) device_property_read_u32(&client->dev, "rohm,touch-max-y", &max_y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) input_set_abs_params(in_dev, ABS_MT_POSITION_X, 0, max_x, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) input_set_abs_params(in_dev, ABS_MT_POSITION_Y, 0, max_y, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) touchscreen_parse_properties(in_dev, true, &ts->props);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) /* Adjust for the legacy "flip" properties, if present */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (!ts->props.invert_x &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) device_property_read_bool(&client->dev, "rohm,flip-x")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) info = &in_dev->absinfo[ABS_MT_POSITION_X];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) info->maximum -= info->minimum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) info->minimum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) if (!ts->props.invert_y &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) device_property_read_bool(&client->dev, "rohm,flip-y")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) info = &in_dev->absinfo[ABS_MT_POSITION_Y];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) info->maximum -= info->minimum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) info->minimum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) error = input_mt_init_slots(in_dev, MAX_FINGERS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) INPUT_MT_DIRECT | INPUT_MT_TRACK |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) INPUT_MT_DROP_UNUSED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) dev_err(&client->dev, "failed to initialize MT slots");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) ts->regulator = devm_regulator_get(&client->dev, "avdd");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) if (IS_ERR(ts->regulator)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) dev_err(&client->dev, "regulator_get failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) return PTR_ERR(ts->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) error = regulator_enable(ts->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) dev_err(&client->dev, "regulator enable failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) error = devm_add_action_or_reset(&client->dev, bu21013_power_off, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) dev_err(&client->dev, "failed to install power off handler\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) /* Named "CS" on the chip, DT binding is "reset" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) ts->cs_gpiod = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_HIGH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) error = PTR_ERR_OR_ZERO(ts->cs_gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) dev_err(&client->dev, "failed to get CS GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) gpiod_set_consumer_name(ts->cs_gpiod, "BU21013 CS");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) error = devm_add_action_or_reset(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) bu21013_disable_chip, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) "failed to install chip disable handler\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /* Named "INT" on the chip, DT binding is "touch" */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) ts->int_gpiod = devm_gpiod_get_optional(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) "touch", GPIOD_IN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) error = PTR_ERR_OR_ZERO(ts->int_gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if (error != -EPROBE_DEFER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) dev_err(&client->dev, "failed to get INT GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if (ts->int_gpiod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) gpiod_set_consumer_name(ts->int_gpiod, "BU21013 INT");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) /* configure the touch panel controller */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) error = bu21013_init_chip(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) dev_err(&client->dev, "error in bu21013 config\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) error = devm_request_threaded_irq(&client->dev, client->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) NULL, bu21013_gpio_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) IRQF_ONESHOT, DRIVER_TP, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) dev_err(&client->dev, "request irq %d failed\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) error = input_register_device(in_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) dev_err(&client->dev, "failed to register input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) i2c_set_clientdata(client, ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) static int bu21013_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) struct bu21013_ts *ts = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) /* Make sure IRQ will exit quickly even if there is contact */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) ts->touch_stopped = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) /* The resources will be freed by devm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) static int __maybe_unused bu21013_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) struct bu21013_ts *ts = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) ts->touch_stopped = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) disable_irq(client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (!device_may_wakeup(&client->dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) regulator_disable(ts->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) static int __maybe_unused bu21013_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) struct bu21013_ts *ts = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) if (!device_may_wakeup(&client->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) error = regulator_enable(ts->regulator);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) "failed to re-enable regulator when resuming\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) error = bu21013_init_chip(ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) "failed to reinitialize chip when resuming\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) ts->touch_stopped = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) enable_irq(client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) static SIMPLE_DEV_PM_OPS(bu21013_dev_pm_ops, bu21013_suspend, bu21013_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) static const struct i2c_device_id bu21013_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) { DRIVER_TP, 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) MODULE_DEVICE_TABLE(i2c, bu21013_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) static struct i2c_driver bu21013_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) .name = DRIVER_TP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) .pm = &bu21013_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) .probe = bu21013_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) .remove = bu21013_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) .id_table = bu21013_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) module_i2c_driver(bu21013_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) MODULE_AUTHOR("Naveen Kumar G <naveen.gaddipati@stericsson.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) MODULE_DESCRIPTION("bu21013 touch screen controller driver");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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