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-rw-r--r--drivers/iio/imu/bmi323/bmi323.h209
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/iio/imu/bmi323/bmi323.h b/drivers/iio/imu/bmi323/bmi323.h
new file mode 100644
index 0000000000..dff126d416
--- /dev/null
+++ b/drivers/iio/imu/bmi323/bmi323.h
@@ -0,0 +1,209 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * IIO driver for Bosch BMI323 6-Axis IMU
+ *
+ * Copyright (C) 2023, Jagath Jog J <jagathjog1996@gmail.com>
+ */
+
+#ifndef _BMI323_H_
+#define _BMI323_H_
+
+#include <linux/bits.h>
+#include <linux/regmap.h>
+#include <linux/units.h>
+
+#define BMI323_I2C_DUMMY 2
+#define BMI323_SPI_DUMMY 1
+
+/* Register map */
+
+#define BMI323_CHIP_ID_REG 0x00
+#define BMI323_CHIP_ID_VAL 0x0043
+#define BMI323_CHIP_ID_MSK GENMASK(7, 0)
+#define BMI323_ERR_REG 0x01
+#define BMI323_STATUS_REG 0x02
+#define BMI323_STATUS_POR_MSK BIT(0)
+
+/* Accelero/Gyro/Temp data registers */
+#define BMI323_ACCEL_X_REG 0x03
+#define BMI323_GYRO_X_REG 0x06
+#define BMI323_TEMP_REG 0x09
+#define BMI323_ALL_CHAN_MSK GENMASK(5, 0)
+
+/* Status registers */
+#define BMI323_STATUS_INT1_REG 0x0D
+#define BMI323_STATUS_INT2_REG 0x0E
+#define BMI323_STATUS_NOMOTION_MSK BIT(0)
+#define BMI323_STATUS_MOTION_MSK BIT(1)
+#define BMI323_STATUS_STP_WTR_MSK BIT(5)
+#define BMI323_STATUS_TAP_MSK BIT(8)
+#define BMI323_STATUS_ERROR_MSK BIT(10)
+#define BMI323_STATUS_TMP_DRDY_MSK BIT(11)
+#define BMI323_STATUS_GYR_DRDY_MSK BIT(12)
+#define BMI323_STATUS_ACC_DRDY_MSK BIT(13)
+#define BMI323_STATUS_ACC_GYR_DRDY_MSK GENMASK(13, 12)
+#define BMI323_STATUS_FIFO_WTRMRK_MSK BIT(14)
+#define BMI323_STATUS_FIFO_FULL_MSK BIT(15)
+
+/* Feature registers */
+#define BMI323_FEAT_IO0_REG 0x10
+#define BMI323_FEAT_IO0_XYZ_NOMOTION_MSK GENMASK(2, 0)
+#define BMI323_FEAT_IO0_XYZ_MOTION_MSK GENMASK(5, 3)
+#define BMI323_FEAT_XYZ_MSK GENMASK(2, 0)
+#define BMI323_FEAT_IO0_STP_CNT_MSK BIT(9)
+#define BMI323_FEAT_IO0_S_TAP_MSK BIT(12)
+#define BMI323_FEAT_IO0_D_TAP_MSK BIT(13)
+#define BMI323_FEAT_IO1_REG 0x11
+#define BMI323_FEAT_IO1_ERR_MSK GENMASK(3, 0)
+#define BMI323_FEAT_IO2_REG 0x12
+#define BMI323_FEAT_IO_STATUS_REG 0x14
+#define BMI323_FEAT_IO_STATUS_MSK BIT(0)
+#define BMI323_FEAT_ENG_POLL 2000
+#define BMI323_FEAT_ENG_TIMEOUT 10000
+
+/* FIFO registers */
+#define BMI323_FIFO_FILL_LEVEL_REG 0x15
+#define BMI323_FIFO_DATA_REG 0x16
+
+/* Accelero/Gyro config registers */
+#define BMI323_ACC_CONF_REG 0x20
+#define BMI323_GYRO_CONF_REG 0x21
+#define BMI323_ACC_GYRO_CONF_MODE_MSK GENMASK(14, 12)
+#define BMI323_ACC_GYRO_CONF_ODR_MSK GENMASK(3, 0)
+#define BMI323_ACC_GYRO_CONF_SCL_MSK GENMASK(6, 4)
+#define BMI323_ACC_GYRO_CONF_BW_MSK BIT(7)
+#define BMI323_ACC_GYRO_CONF_AVG_MSK GENMASK(10, 8)
+
+/* FIFO registers */
+#define BMI323_FIFO_WTRMRK_REG 0x35
+#define BMI323_FIFO_CONF_REG 0x36
+#define BMI323_FIFO_CONF_STP_FUL_MSK BIT(0)
+#define BMI323_FIFO_CONF_ACC_GYR_EN_MSK GENMASK(10, 9)
+#define BMI323_FIFO_ACC_GYR_MSK GENMASK(1, 0)
+#define BMI323_FIFO_CTRL_REG 0x37
+#define BMI323_FIFO_FLUSH_MSK BIT(0)
+
+/* Interrupt pin config registers */
+#define BMI323_IO_INT_CTR_REG 0x38
+#define BMI323_IO_INT1_LVL_MSK BIT(0)
+#define BMI323_IO_INT1_OD_MSK BIT(1)
+#define BMI323_IO_INT1_OP_EN_MSK BIT(2)
+#define BMI323_IO_INT1_LVL_OD_OP_MSK GENMASK(2, 0)
+#define BMI323_IO_INT2_LVL_MSK BIT(8)
+#define BMI323_IO_INT2_OD_MSK BIT(9)
+#define BMI323_IO_INT2_OP_EN_MSK BIT(10)
+#define BMI323_IO_INT2_LVL_OD_OP_MSK GENMASK(10, 8)
+#define BMI323_IO_INT_CONF_REG 0x39
+#define BMI323_IO_INT_LTCH_MSK BIT(0)
+#define BMI323_INT_MAP1_REG 0x3A
+#define BMI323_INT_MAP2_REG 0x3B
+#define BMI323_NOMOTION_MSK GENMASK(1, 0)
+#define BMI323_MOTION_MSK GENMASK(3, 2)
+#define BMI323_STEP_CNT_MSK GENMASK(11, 10)
+#define BMI323_TAP_MSK GENMASK(1, 0)
+#define BMI323_TMP_DRDY_MSK GENMASK(7, 6)
+#define BMI323_GYR_DRDY_MSK GENMASK(9, 8)
+#define BMI323_ACC_DRDY_MSK GENMASK(11, 10)
+#define BMI323_FIFO_WTRMRK_MSK GENMASK(13, 12)
+#define BMI323_FIFO_FULL_MSK GENMASK(15, 14)
+
+/* Feature registers */
+#define BMI323_FEAT_CTRL_REG 0x40
+#define BMI323_FEAT_ENG_EN_MSK BIT(0)
+#define BMI323_FEAT_DATA_ADDR 0x41
+#define BMI323_FEAT_DATA_TX 0x42
+#define BMI323_FEAT_DATA_STATUS 0x43
+#define BMI323_FEAT_DATA_TX_RDY_MSK BIT(1)
+#define BMI323_FEAT_EVNT_EXT_REG 0x47
+#define BMI323_FEAT_EVNT_EXT_S_MSK BIT(3)
+#define BMI323_FEAT_EVNT_EXT_D_MSK BIT(4)
+
+#define BMI323_CMD_REG 0x7E
+#define BMI323_RST_VAL 0xDEAF
+#define BMI323_CFG_RES_REG 0x7F
+
+/* Extended registers */
+#define BMI323_GEN_SET1_REG 0x02
+#define BMI323_GEN_SET1_MODE_MSK BIT(0)
+#define BMI323_GEN_HOLD_DUR_MSK GENMASK(4, 1)
+
+/* Any Motion/No Motion config registers */
+#define BMI323_ANYMO1_REG 0x05
+#define BMI323_NOMO1_REG 0x08
+#define BMI323_MO2_OFFSET 0x01
+#define BMI323_MO3_OFFSET 0x02
+#define BMI323_MO1_REF_UP_MSK BIT(12)
+#define BMI323_MO1_SLOPE_TH_MSK GENMASK(11, 0)
+#define BMI323_MO2_HYSTR_MSK GENMASK(9, 0)
+#define BMI323_MO3_DURA_MSK GENMASK(12, 0)
+
+/* Step counter config registers */
+#define BMI323_STEP_SC1_REG 0x10
+#define BMI323_STEP_SC1_WTRMRK_MSK GENMASK(9, 0)
+#define BMI323_STEP_SC1_RST_CNT_MSK BIT(10)
+#define BMI323_STEP_SC1_REG 0x10
+#define BMI323_STEP_LEN 2
+
+/* Tap gesture config registers */
+#define BMI323_TAP1_REG 0x1E
+#define BMI323_TAP1_AXIS_SEL_MSK GENMASK(1, 0)
+#define BMI323_AXIS_XYZ_MSK GENMASK(1, 0)
+#define BMI323_TAP1_TIMOUT_MSK BIT(2)
+#define BMI323_TAP1_MAX_PEAKS_MSK GENMASK(5, 3)
+#define BMI323_TAP1_MODE_MSK GENMASK(7, 6)
+#define BMI323_TAP2_REG 0x1F
+#define BMI323_TAP2_THRES_MSK GENMASK(9, 0)
+#define BMI323_TAP2_MAX_DUR_MSK GENMASK(15, 10)
+#define BMI323_TAP3_REG 0x20
+#define BMI323_TAP3_QUIET_TIM_MSK GENMASK(15, 12)
+#define BMI323_TAP3_QT_BW_TAP_MSK GENMASK(11, 8)
+#define BMI323_TAP3_QT_AFT_GES_MSK GENMASK(15, 12)
+
+#define BMI323_MOTION_THRES_SCALE 512
+#define BMI323_MOTION_HYSTR_SCALE 512
+#define BMI323_MOTION_DURAT_SCALE 50
+#define BMI323_TAP_THRES_SCALE 512
+#define BMI323_DUR_BW_TAP_SCALE 200
+#define BMI323_QUITE_TIM_GES_SCALE 25
+#define BMI323_MAX_GES_DUR_SCALE 25
+
+/*
+ * The formula to calculate temperature in C.
+ * See datasheet section 6.1.1, Register Map Overview
+ *
+ * T_C = (temp_raw / 512) + 23
+ */
+#define BMI323_TEMP_OFFSET 11776
+#define BMI323_TEMP_SCALE 1953125
+
+/*
+ * The BMI323 features a FIFO with a capacity of 2048 bytes. Each frame
+ * consists of accelerometer (X, Y, Z) data and gyroscope (X, Y, Z) data,
+ * totaling 6 words or 12 bytes. The FIFO buffer can hold a total of
+ * 170 frames.
+ *
+ * If a watermark interrupt is configured for 170 frames, the interrupt will
+ * trigger when the FIFO reaches 169 frames, so limit the maximum watermark
+ * level to 169 frames. In terms of data, 169 frames would equal 1014 bytes,
+ * which is approximately 2 frames before the FIFO reaches its full capacity.
+ * See datasheet section 5.7.3 FIFO Buffer Interrupts
+ */
+#define BMI323_BYTES_PER_SAMPLE 2
+#define BMI323_FIFO_LENGTH_IN_BYTES 2048
+#define BMI323_FIFO_FRAME_LENGTH 6
+#define BMI323_FIFO_FULL_IN_FRAMES \
+ ((BMI323_FIFO_LENGTH_IN_BYTES / \
+ (BMI323_BYTES_PER_SAMPLE * BMI323_FIFO_FRAME_LENGTH)) - 1)
+#define BMI323_FIFO_FULL_IN_WORDS \
+ (BMI323_FIFO_FULL_IN_FRAMES * BMI323_FIFO_FRAME_LENGTH)
+
+#define BMI323_INT_MICRO_TO_RAW(val, val2, scale) ((val) * (scale) + \
+ ((val2) * (scale)) / MEGA)
+
+#define BMI323_RAW_TO_MICRO(raw, scale) ((((raw) % (scale)) * MEGA) / scale)
+
+struct device;
+int bmi323_core_probe(struct device *dev);
+extern const struct regmap_config bmi323_regmap_config;
+
+#endif