| /* 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; |
