1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Register constants and other forward declarations needed by the bma400 4 * sources. 5 * 6 * Copyright 2019 Dan Robertson <dan@dlrobertson.com> 7 */ 8 9 #ifndef _BMA400_H_ 10 #define _BMA400_H_ 11 12 #include <linux/bits.h> 13 #include <linux/regmap.h> 14 15 /* 16 * Read-Only Registers 17 */ 18 19 /* Status and ID registers */ 20 #define BMA400_CHIP_ID_REG 0x00 21 #define BMA400_ERR_REG 0x02 22 #define BMA400_STATUS_REG 0x03 23 24 /* Acceleration registers */ 25 #define BMA400_X_AXIS_LSB_REG 0x04 26 #define BMA400_X_AXIS_MSB_REG 0x05 27 #define BMA400_Y_AXIS_LSB_REG 0x06 28 #define BMA400_Y_AXIS_MSB_REG 0x07 29 #define BMA400_Z_AXIS_LSB_REG 0x08 30 #define BMA400_Z_AXIS_MSB_REG 0x09 31 32 /* Sensor time registers */ 33 #define BMA400_SENSOR_TIME0 0x0a 34 #define BMA400_SENSOR_TIME1 0x0b 35 #define BMA400_SENSOR_TIME2 0x0c 36 37 /* Event and interrupt registers */ 38 #define BMA400_EVENT_REG 0x0d 39 #define BMA400_INT_STAT0_REG 0x0e 40 #define BMA400_INT_STAT1_REG 0x0f 41 #define BMA400_INT_STAT2_REG 0x10 42 #define BMA400_INT12_MAP_REG 0x23 43 #define BMA400_INT_ENG_OVRUN_MSK BIT(4) 44 45 /* Temperature register */ 46 #define BMA400_TEMP_DATA_REG 0x11 47 48 /* FIFO length and data registers */ 49 #define BMA400_FIFO_LENGTH0_REG 0x12 50 #define BMA400_FIFO_LENGTH1_REG 0x13 51 #define BMA400_FIFO_DATA_REG 0x14 52 53 /* Step count registers */ 54 #define BMA400_STEP_CNT0_REG 0x15 55 #define BMA400_STEP_CNT1_REG 0x16 56 #define BMA400_STEP_CNT3_REG 0x17 57 #define BMA400_STEP_STAT_REG 0x18 58 #define BMA400_STEP_INT_MSK BIT(0) 59 #define BMA400_STEP_RAW_LEN 0x03 60 #define BMA400_STEP_STAT_MASK GENMASK(9, 8) 61 62 /* 63 * Read-write configuration registers 64 */ 65 #define BMA400_ACC_CONFIG0_REG 0x19 66 #define BMA400_ACC_CONFIG1_REG 0x1a 67 #define BMA400_ACC_CONFIG2_REG 0x1b 68 #define BMA400_CMD_REG 0x7e 69 70 /* Interrupt registers */ 71 #define BMA400_INT_CONFIG0_REG 0x1f 72 #define BMA400_INT_CONFIG1_REG 0x20 73 #define BMA400_INT1_MAP_REG 0x21 74 #define BMA400_INT_IO_CTRL_REG 0x24 75 #define BMA400_INT_DRDY_MSK BIT(7) 76 77 /* Chip ID of BMA 400 devices found in the chip ID register. */ 78 #define BMA400_ID_REG_VAL 0x90 79 80 #define BMA400_LP_OSR_SHIFT 5 81 #define BMA400_NP_OSR_SHIFT 4 82 #define BMA400_SCALE_SHIFT 6 83 84 #define BMA400_TWO_BITS_MASK GENMASK(1, 0) 85 #define BMA400_LP_OSR_MASK GENMASK(6, 5) 86 #define BMA400_NP_OSR_MASK GENMASK(5, 4) 87 #define BMA400_ACC_ODR_MASK GENMASK(3, 0) 88 #define BMA400_ACC_SCALE_MASK GENMASK(7, 6) 89 90 #define BMA400_ACC_ODR_MIN_RAW 0x05 91 #define BMA400_ACC_ODR_LP_RAW 0x06 92 #define BMA400_ACC_ODR_MAX_RAW 0x0b 93 94 #define BMA400_ACC_ODR_MAX_HZ 800 95 #define BMA400_ACC_ODR_MIN_WHOLE_HZ 25 96 #define BMA400_ACC_ODR_MIN_HZ 12 97 98 /* Generic interrupts register */ 99 #define BMA400_GEN1INT_CONFIG0 0x3f 100 #define BMA400_GEN2INT_CONFIG0 0x4A 101 #define BMA400_GEN_CONFIG1_OFF 0x01 102 #define BMA400_GEN_CONFIG2_OFF 0x02 103 #define BMA400_GEN_CONFIG3_OFF 0x03 104 #define BMA400_GEN_CONFIG31_OFF 0x04 105 #define BMA400_INT_GEN1_MSK BIT(2) 106 #define BMA400_INT_GEN2_MSK BIT(3) 107 #define BMA400_GEN_HYST_MSK GENMASK(1, 0) 108 109 /* TAP config registers */ 110 #define BMA400_TAP_CONFIG 0x57 111 #define BMA400_TAP_CONFIG1 0x58 112 #define BMA400_S_TAP_MSK BIT(2) 113 #define BMA400_D_TAP_MSK BIT(3) 114 #define BMA400_INT_S_TAP_MSK BIT(10) 115 #define BMA400_INT_D_TAP_MSK BIT(11) 116 #define BMA400_TAP_SEN_MSK GENMASK(2, 0) 117 #define BMA400_TAP_TICSTH_MSK GENMASK(1, 0) 118 #define BMA400_TAP_QUIET_MSK GENMASK(3, 2) 119 #define BMA400_TAP_QUIETDT_MSK GENMASK(5, 4) 120 #define BMA400_TAP_TIM_LIST_LEN 4 121 122 /* 123 * BMA400_SCALE_MIN macro value represents m/s^2 for 1 LSB before 124 * converting to micro values for +-2g range. 125 * 126 * For +-2g - 1 LSB = 0.976562 milli g = 0.009576 m/s^2 127 * For +-4g - 1 LSB = 1.953125 milli g = 0.019153 m/s^2 128 * For +-16g - 1 LSB = 7.8125 milli g = 0.076614 m/s^2 129 * 130 * The raw value which is used to select the different ranges is determined 131 * by the first bit set position from the scale value, so BMA400_SCALE_MIN 132 * should be odd. 133 * 134 * Scale values for +-2g, +-4g, +-8g and +-16g are populated into bma400_scales 135 * array by left shifting BMA400_SCALE_MIN. 136 * e.g.: 137 * To select +-2g = 9577 << 0 = raw value to write is 0. 138 * To select +-8g = 9577 << 2 = raw value to write is 2. 139 * To select +-16g = 9577 << 3 = raw value to write is 3. 140 */ 141 #define BMA400_SCALE_MIN 9577 142 #define BMA400_SCALE_MAX 76617 143 144 extern const struct regmap_config bma400_regmap_config; 145 146 int bma400_probe(struct device *dev, struct regmap *regmap, int irq, 147 const char *name); 148 149 #endif 150