/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/iio/iio.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
/* BMP580 specific registers */
#define BMP580_REG_CMD 0x7E
#define BMP580_REG_EFF_OSR 0x38
#define BMP580_REG_ODR_CONFIG 0x37
#define BMP580_REG_OSR_CONFIG 0x36
#define BMP580_REG_IF_CONFIG 0x13
#define BMP580_REG_REV_ID 0x02
#define BMP580_REG_CHIP_ID 0x01
/* OOR allows to configure a pressure alarm */
#define BMP580_REG_OOR_CONFIG 0x35
#define BMP580_REG_OOR_RANGE 0x34
#define BMP580_REG_OOR_THR_MSB 0x33
#define BMP580_REG_OOR_THR_LSB 0x32
/* DSP registers (IIR filters) */
#define BMP580_REG_DSP_IIR 0x31
#define BMP580_REG_DSP_CONFIG 0x30
/* NVM access registers */
#define BMP580_REG_NVM_DATA_MSB 0x2D
#define BMP580_REG_NVM_DATA_LSB 0x2C
#define BMP580_REG_NVM_ADDR 0x2B
/* Status registers */
#define BMP580_REG_STATUS 0x28
#define BMP580_REG_INT_STATUS 0x27
#define BMP580_REG_CHIP_STATUS 0x11
/* Data registers */
#define BMP580_REG_FIFO_DATA 0x29
#define BMP580_REG_PRESS_MSB 0x22
#define BMP580_REG_PRESS_LSB 0x21
#define BMP580_REG_PRESS_XLSB 0x20
#define BMP580_REG_TEMP_MSB 0x1F
#define BMP580_REG_TEMP_LSB 0x1E
#define BMP580_REG_TEMP_XLSB 0x1D
/* FIFO config registers */
#define BMP580_REG_FIFO_SEL 0x18
#define BMP580_REG_FIFO_COUNT 0x17
#define BMP580_REG_FIFO_CONFIG 0x16
/* Interruptions config registers */
#define BMP580_REG_INT_SOURCE 0x15
#define BMP580_REG_INT_CONFIG 0x14
#define BMP580_CMD_NOOP 0x00
#define BMP580_CMD_EXTMODE_SEQ_0 0x73
#define BMP580_CMD_EXTMODE_SEQ_1 0xB4
#define BMP580_CMD_EXTMODE_SEQ_2 0x69
#define BMP580_CMD_NVM_OP_SEQ_0 0x5D
#define BMP580_CMD_NVM_READ_SEQ_1 0xA5
#define BMP580_CMD_NVM_WRITE_SEQ_1 0xA0
#define BMP580_CMD_SOFT_RESET 0xB6
#define BMP580_INT_STATUS_POR_MASK BIT(4)
#define BMP580_STATUS_CORE_RDY_MASK BIT(0)
#define BMP580_STATUS_NVM_RDY_MASK BIT(1)
#define BMP580_STATUS_NVM_ERR_MASK BIT(2)
#define BMP580_STATUS_NVM_CMD_ERR_MASK BIT(3)
#define BMP580_OSR_PRESS_MASK GENMASK(5, 3)
#define BMP580_OSR_TEMP_MASK GENMASK(2, 0)
#define BMP580_OSR_PRESS_EN BIT(6)
#define BMP580_EFF_OSR_PRESS_MASK GENMASK(5, 3)
#define BMP580_EFF_OSR_TEMP_MASK GENMASK(2, 0)
#define BMP580_EFF_OSR_VALID_ODR BIT(7)
#define BMP580_ODR_MASK GENMASK(6, 2)
#define BMP580_MODE_MASK GENMASK(1, 0)
#define BMP580_MODE_SLEEP 0
#define BMP580_MODE_NORMAL 1
#define BMP580_MODE_FORCED 2
#define BMP580_MODE_CONTINOUS 3
#define BMP580_ODR_DEEPSLEEP_DIS BIT(7)
#define BMP580_DSP_COMP_MASK GENMASK(1, 0)
#define BMP580_DSP_COMP_DIS 0
#define BMP580_DSP_TEMP_COMP_EN 1
/*
* In section 7.27 of datasheet, modes 2 and 3 are technically the same.
* Pressure compensation means also enabling temperature compensation
*/
#define BMP580_DSP_PRESS_COMP_EN 2
#define BMP580_DSP_PRESS_TEMP_COMP_EN 3
#define BMP580_DSP_IIR_FORCED_FLUSH BIT(2)
#define BMP580_DSP_SHDW_IIR_TEMP_EN BIT(3)
#define BMP580_DSP_FIFO_IIR_TEMP_EN BIT(4)
#define BMP580_DSP_SHDW_IIR_PRESS_EN BIT(5)
#define BMP580_DSP_FIFO_IIR_PRESS_EN BIT(6)
#define BMP580_DSP_OOR_IIR_PRESS_EN BIT(7)
#define BMP580_DSP_IIR_PRESS_MASK GENMASK(5, 3)
#define BMP580_DSP_IIR_TEMP_MASK GENMASK(2, 0)
#define BMP580_FILTER_OFF 0
#define BMP580_FILTER_1X 1
#define BMP580_FILTER_3X 2
#define BMP580_FILTER_7X 3
#define BMP580_FILTER_15X 4
#define BMP580_FILTER_31X 5
#define BMP580_FILTER_63X 6
#define BMP580_FILTER_127X 7
#define BMP580_NVM_ROW_ADDR_MASK GENMASK(5, 0)
#define BMP580_NVM_PROG_EN BIT(6)
#define BMP580_TEMP_SKIPPED 0x7f7f7f
#define BMP580_PRESS_SKIPPED 0x7f7f7f
/* BMP380 specific registers */
#define BMP380_REG_CMD 0x7E
#define BMP380_REG_CONFIG 0x1F
#define BMP380_REG_ODR 0x1D
#define BMP380_REG_OSR 0x1C
#define BMP380_REG_POWER_CONTROL 0x1B
#define BMP380_REG_IF_CONFIG 0x1A
#define BMP380_REG_INT_CONTROL 0x19
#define BMP380_REG_INT_STATUS 0x11
#define BMP380_REG_EVENT 0x10
#define BMP380_REG_STATUS 0x03
#define BMP380_REG_ERROR 0x02
#define BMP380_REG_ID 0x00
#define BMP380_REG_FIFO_CONFIG_1 0x18
#define BMP380_REG_FIFO_CONFIG_2 0x17
#define BMP380_REG_FIFO_WATERMARK_MSB 0x16
#define BMP380_REG_FIFO_WATERMARK_LSB 0x15
#define BMP380_REG_FIFO_DATA 0x14
#define BMP380_REG_FIFO_LENGTH_MSB 0x13
#define BMP380_REG_FIFO_LENGTH_LSB 0x12
#define BMP380_REG_SENSOR_TIME_MSB 0x0E
#define BMP380_REG_SENSOR_TIME_LSB 0x0D
#define BMP380_REG_SENSOR_TIME_XLSB 0x0C
#define BMP380_REG_TEMP_MSB 0x09
#define BMP380_REG_TEMP_LSB 0x08
#define BMP380_REG_TEMP_XLSB 0x07
#define BMP380_REG_PRESS_MSB 0x06
#define BMP380_REG_PRESS_LSB 0x05
#define BMP380_REG_PRESS_XLSB 0x04
#define BMP380_REG_CALIB_TEMP_START 0x31
#define BMP380_CALIB_REG_COUNT 21
#define BMP380_FILTER_MASK GENMASK(3, 1)
#define BMP380_FILTER_OFF 0
#define BMP380_FILTER_1X 1
#define BMP380_FILTER_3X 2
#define BMP380_FILTER_7X 3
#define BMP380_FILTER_15X 4
#define BMP380_FILTER_31X 5
#define BMP380_FILTER_63X 6
#define BMP380_FILTER_127X 7
#define BMP380_OSRS_TEMP_MASK GENMASK(5, 3)
#define BMP380_OSRS_PRESS_MASK GENMASK(2, 0)
#define BMP380_ODRS_MASK GENMASK(4, 0)
#define BMP380_CTRL_SENSORS_MASK GENMASK(1, 0)
#define BMP380_CTRL_SENSORS_PRESS_EN BIT(0)
#define BMP380_CTRL_SENSORS_TEMP_EN BIT(1)
#define BMP380_MODE_MASK GENMASK(5, 4)
#define BMP380_MODE_SLEEP 0
#define BMP380_MODE_FORCED 1
#define BMP380_MODE_NORMAL 3
#define BMP380_MIN_TEMP -4000
#define BMP380_MAX_TEMP 8500
#define BMP380_MIN_PRES 3000000
#define BMP380_MAX_PRES 12500000
#define BMP380_CMD_NOOP 0x00
#define BMP380_CMD_EXTMODE_EN_MID 0x34
#define BMP380_CMD_FIFO_FLUSH 0xB0
#define BMP380_CMD_SOFT_RESET 0xB6
#define BMP380_STATUS_CMD_RDY_MASK BIT(4)
#define BMP380_STATUS_DRDY_PRESS_MASK BIT(5)
#define BMP380_STATUS_DRDY_TEMP_MASK BIT(6)
#define BMP380_ERR_FATAL_MASK BIT(0)
#define BMP380_ERR_CMD_MASK BIT(1)
#define BMP380_ERR_CONF_MASK BIT(2)
#define BMP380_TEMP_SKIPPED 0x800000
#define BMP380_PRESS_SKIPPED 0x800000
/* BMP280 specific registers */
#define BMP280_REG_HUMIDITY_LSB 0xFE
#define BMP280_REG_HUMIDITY_MSB 0xFD
#define BMP280_REG_TEMP_XLSB 0xFC
#define BMP280_REG_TEMP_LSB 0xFB
#define BMP280_REG_TEMP_MSB 0xFA
#define BMP280_REG_PRESS_XLSB 0xF9
#define BMP280_REG_PRESS_LSB 0xF8
#define BMP280_REG_PRESS_MSB 0xF7
/* Helper mask to truncate excess 4 bits on pressure and temp readings */
#define BMP280_MEAS_TRIM_MASK GENMASK(24, 4)
#define BMP280_REG_CONFIG 0xF5
#define BMP280_REG_CTRL_MEAS 0xF4
#define BMP280_REG_STATUS 0xF3
#define BMP280_REG_CTRL_HUMIDITY 0xF2
/* Due to non linear mapping, and data sizes we can't do a bulk read */
#define BMP280_REG_COMP_H1 0xA1
#define BMP280_REG_COMP_H2 0xE1
#define BMP280_REG_COMP_H3 0xE3
#define BMP280_REG_COMP_H4 0xE4
#define BMP280_REG_COMP_H5 0xE5
#define BMP280_REG_COMP_H6 0xE7
#define BMP280_REG_COMP_TEMP_START 0x88
#define BMP280_COMP_TEMP_REG_COUNT 6
#define BMP280_REG_COMP_PRESS_START 0x8E
#define BMP280_COMP_PRESS_REG_COUNT 18
#define BMP280_COMP_H5_MASK GENMASK(15, 4)
#define BMP280_CONTIGUOUS_CALIB_REGS (BMP280_COMP_TEMP_REG_COUNT + \
BMP280_COMP_PRESS_REG_COUNT)
#define BMP280_FILTER_MASK GENMASK(4, 2)
#define BMP280_FILTER_OFF 0
#define BMP280_FILTER_2X 1
#define BMP280_FILTER_4X 2
#define BMP280_FILTER_8X 3
#define BMP280_FILTER_16X 4
#define BMP280_OSRS_HUMIDITY_MASK GENMASK(2, 0)
#define BMP280_OSRS_HUMIDITY_SKIP 0
#define BMP280_OSRS_HUMIDITY_1X 1
#define BMP280_OSRS_HUMIDITY_2X 2
#define BMP280_OSRS_HUMIDITY_4X 3
#define BMP280_OSRS_HUMIDITY_8X 4
#define BMP280_OSRS_HUMIDITY_16X 5
#define BMP280_OSRS_TEMP_MASK GENMASK(7, 5)
#define BMP280_OSRS_TEMP_SKIP 0
#define BMP280_OSRS_TEMP_1X 1
#define BMP280_OSRS_TEMP_2X 2
#define BMP280_OSRS_TEMP_4X 3
#define BMP280_OSRS_TEMP_8X 4
#define BMP280_OSRS_TEMP_16X 5
#define BMP280_OSRS_PRESS_MASK GENMASK(4, 2)
#define BMP280_OSRS_PRESS_SKIP 0
#define BMP280_OSRS_PRESS_1X 1
#define BMP280_OSRS_PRESS_2X 2
#define BMP280_OSRS_PRESS_4X 3
#define BMP280_OSRS_PRESS_8X 4
#define BMP280_OSRS_PRESS_16X 5
#define BMP280_MODE_MASK GENMASK(1, 0)
#define BMP280_MODE_SLEEP 0
#define BMP280_MODE_FORCED 1
#define BMP280_MODE_NORMAL 3
/* BMP180 specific registers */
#define BMP180_REG_OUT_XLSB 0xF8
#define BMP180_REG_OUT_LSB 0xF7
#define BMP180_REG_OUT_MSB 0xF6
#define BMP180_REG_CALIB_START 0xAA
#define BMP180_REG_CALIB_COUNT 22
#define BMP180_MEAS_CTRL_MASK GENMASK(4, 0)
#define BMP180_MEAS_TEMP 0x0E
#define BMP180_MEAS_PRESS 0x14
#define BMP180_MEAS_SCO BIT(5)
#define BMP180_OSRS_PRESS_MASK GENMASK(7, 6)
#define BMP180_MEAS_PRESS_1X 0
#define BMP180_MEAS_PRESS_2X 1
#define BMP180_MEAS_PRESS_4X 2
#define BMP180_MEAS_PRESS_8X 3
/* BMP180 and BMP280 common registers */
#define BMP280_REG_CTRL_MEAS 0xF4
#define BMP280_REG_RESET 0xE0
#define BMP280_REG_ID 0xD0
#define BMP380_CHIP_ID 0x50
#define BMP580_CHIP_ID 0x50
#define BMP580_CHIP_ID_ALT 0x51
#define BMP180_CHIP_ID 0x55
#define BMP280_CHIP_ID 0x58
#define BME280_CHIP_ID 0x60
#define BMP280_SOFT_RESET_VAL 0xB6
/* BMP280 register skipped special values */
#define BMP280_TEMP_SKIPPED 0x80000
#define BMP280_PRESS_SKIPPED 0x80000
#define BMP280_HUMIDITY_SKIPPED 0x8000
/* Core exported structs */
static const char *const bmp280_supply_names[] = {
"vddd", "vdda"
};
#define BMP280_NUM_SUPPLIES ARRAY_SIZE(bmp280_supply_names)
struct bmp180_calib {
s16 AC1;
s16 AC2;
s16 AC3;
u16 AC4;
u16 AC5;
u16 AC6;
s16 B1;
s16 B2;
s16 MB;
s16 MC;
s16 MD;
};
/* See datasheet Section 4.2.2. */
struct bmp280_calib {
u16 T1;
s16 T2;
s16 T3;
u16 P1;
s16 P2;
s16 P3;
s16 P4;
s16 P5;
s16 P6;
s16 P7;
s16 P8;
s16 P9;
u8 H1;
s16 H2;
u8 H3;
s16 H4;
s16 H5;
s8 H6;
};
/* See datasheet Section 3.11.1. */
struct bmp380_calib {
u16 T1;
u16 T2;
s8 T3;
s16 P1;
s16 P2;
s8 P3;
s8 P4;
u16 P5;
u16 P6;
s8 P7;
s8 P8;
s16 P9;
s8 P10;
s8 P11;
};
struct bmp280_data {
struct device *dev;
struct mutex lock;
struct regmap *regmap;
struct completion done;
bool use_eoc;
const struct bmp280_chip_info *chip_info;
union {
struct bmp180_calib bmp180;
struct bmp280_calib bmp280;
struct bmp380_calib bmp380;
} calib;
struct regulator_bulk_data supplies[BMP280_NUM_SUPPLIES];
unsigned int start_up_time; /* in microseconds */
/* log of base 2 of oversampling rate */
u8 oversampling_press;
u8 oversampling_temp;
u8 oversampling_humid;
u8 iir_filter_coeff;
/*
* BMP380 devices introduce sampling frequency configuration. See
* datasheet sections 3.3.3. and 4.3.19 for more details.
*
* BMx280 devices allowed indirect configuration of sampling frequency
* changing the t_standby duration between measurements, as detailed on
* section 3.6.3 of the datasheet.
*/
int sampling_freq;
/*
* Carryover value from temperature conversion, used in pressure
* calculation.
*/
s32 t_fine;
/*
* DMA (thus cache coherency maintenance) may require the
* transfer buffers to live in their own cache lines.
*/
union {
/* Sensor data buffer */
u8 buf[3];
/* Calibration data buffers */
__le16 bmp280_cal_buf[BMP280_CONTIGUOUS_CALIB_REGS / 2];
__be16 bmp180_cal_buf[BMP180_REG_CALIB_COUNT / 2];
u8 bmp380_cal_buf[BMP380_CALIB_REG_COUNT];
/* Miscellaneous, endianess-aware data buffers */
__le16 le16;
__be16 be16;
} __aligned(IIO_DMA_MINALIGN);
};
struct bmp280_chip_info {
unsigned int id_reg;
const unsigned int chip_id;
const struct regmap_config *regmap_config;
const struct iio_chan_spec *channels;
int num_channels;
unsigned int start_up_time;
const int *oversampling_temp_avail;
int num_oversampling_temp_avail;
int oversampling_temp_default;
const int *oversampling_press_avail;
int num_oversampling_press_avail;
int oversampling_press_default;
const int *oversampling_humid_avail;
int num_oversampling_humid_avail;
int oversampling_humid_default;
const int *iir_filter_coeffs_avail;
int num_iir_filter_coeffs_avail;
int iir_filter_coeff_default;
const int (*sampling_freq_avail)[2];
int num_sampling_freq_avail;
int sampling_freq_default;
int (*chip_config)(struct bmp280_data *);
int (*read_temp)(struct bmp280_data *, int *, int *);
int (*read_press)(struct bmp280_data *, int *, int *);
int (*read_humid)(struct bmp280_data *, int *, int *);
int (*read_calib)(struct bmp280_data *);
int (*preinit)(struct bmp280_data *);
};
/* Chip infos for each variant */
extern const struct bmp280_chip_info bmp180_chip_info;
extern const struct bmp280_chip_info bmp280_chip_info;
extern const struct bmp280_chip_info bme280_chip_info;
extern const struct bmp280_chip_info bmp380_chip_info;
extern const struct bmp280_chip_info bmp580_chip_info;
/* Regmap configurations */
extern const struct regmap_config bmp180_regmap_config;
extern const struct regmap_config bmp280_regmap_config;
extern const struct regmap_config bmp380_regmap_config;
extern const struct regmap_config bmp580_regmap_config;
/* Probe called from different transports */
int bmp280_common_probe(struct device *dev,
struct regmap *regmap,
const struct bmp280_chip_info *,
const char *name,
int irq);
/* PM ops */
extern const struct dev_pm_ops bmp280_dev_pm_ops;
