119 lines
4 KiB
C
119 lines
4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/bitops.h>
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#include <linux/device.h>
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#include <linux/regmap.h>
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/* BMP280 specific registers */
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#define BMP280_REG_HUMIDITY_LSB 0xFE
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#define BMP280_REG_HUMIDITY_MSB 0xFD
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#define BMP280_REG_TEMP_XLSB 0xFC
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#define BMP280_REG_TEMP_LSB 0xFB
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#define BMP280_REG_TEMP_MSB 0xFA
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#define BMP280_REG_PRESS_XLSB 0xF9
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#define BMP280_REG_PRESS_LSB 0xF8
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#define BMP280_REG_PRESS_MSB 0xF7
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#define BMP280_REG_CONFIG 0xF5
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#define BMP280_REG_CTRL_MEAS 0xF4
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#define BMP280_REG_STATUS 0xF3
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#define BMP280_REG_CTRL_HUMIDITY 0xF2
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/* Due to non linear mapping, and data sizes we can't do a bulk read */
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#define BMP280_REG_COMP_H1 0xA1
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#define BMP280_REG_COMP_H2 0xE1
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#define BMP280_REG_COMP_H3 0xE3
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#define BMP280_REG_COMP_H4 0xE4
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#define BMP280_REG_COMP_H5 0xE5
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#define BMP280_REG_COMP_H6 0xE7
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#define BMP280_REG_COMP_TEMP_START 0x88
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#define BMP280_COMP_TEMP_REG_COUNT 6
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#define BMP280_REG_COMP_PRESS_START 0x8E
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#define BMP280_COMP_PRESS_REG_COUNT 18
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#define BMP280_FILTER_MASK (BIT(4) | BIT(3) | BIT(2))
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#define BMP280_FILTER_OFF 0
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#define BMP280_FILTER_2X BIT(2)
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#define BMP280_FILTER_4X BIT(3)
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#define BMP280_FILTER_8X (BIT(3) | BIT(2))
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#define BMP280_FILTER_16X BIT(4)
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#define BMP280_OSRS_HUMIDITY_MASK (BIT(2) | BIT(1) | BIT(0))
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#define BMP280_OSRS_HUMIDITIY_X(osrs_h) ((osrs_h) << 0)
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#define BMP280_OSRS_HUMIDITY_SKIP 0
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#define BMP280_OSRS_HUMIDITY_1X BMP280_OSRS_HUMIDITIY_X(1)
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#define BMP280_OSRS_HUMIDITY_2X BMP280_OSRS_HUMIDITIY_X(2)
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#define BMP280_OSRS_HUMIDITY_4X BMP280_OSRS_HUMIDITIY_X(3)
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#define BMP280_OSRS_HUMIDITY_8X BMP280_OSRS_HUMIDITIY_X(4)
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#define BMP280_OSRS_HUMIDITY_16X BMP280_OSRS_HUMIDITIY_X(5)
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#define BMP280_OSRS_TEMP_MASK (BIT(7) | BIT(6) | BIT(5))
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#define BMP280_OSRS_TEMP_SKIP 0
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#define BMP280_OSRS_TEMP_X(osrs_t) ((osrs_t) << 5)
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#define BMP280_OSRS_TEMP_1X BMP280_OSRS_TEMP_X(1)
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#define BMP280_OSRS_TEMP_2X BMP280_OSRS_TEMP_X(2)
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#define BMP280_OSRS_TEMP_4X BMP280_OSRS_TEMP_X(3)
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#define BMP280_OSRS_TEMP_8X BMP280_OSRS_TEMP_X(4)
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#define BMP280_OSRS_TEMP_16X BMP280_OSRS_TEMP_X(5)
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#define BMP280_OSRS_PRESS_MASK (BIT(4) | BIT(3) | BIT(2))
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#define BMP280_OSRS_PRESS_SKIP 0
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#define BMP280_OSRS_PRESS_X(osrs_p) ((osrs_p) << 2)
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#define BMP280_OSRS_PRESS_1X BMP280_OSRS_PRESS_X(1)
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#define BMP280_OSRS_PRESS_2X BMP280_OSRS_PRESS_X(2)
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#define BMP280_OSRS_PRESS_4X BMP280_OSRS_PRESS_X(3)
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#define BMP280_OSRS_PRESS_8X BMP280_OSRS_PRESS_X(4)
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#define BMP280_OSRS_PRESS_16X BMP280_OSRS_PRESS_X(5)
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#define BMP280_MODE_MASK (BIT(1) | BIT(0))
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#define BMP280_MODE_SLEEP 0
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#define BMP280_MODE_FORCED BIT(0)
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#define BMP280_MODE_NORMAL (BIT(1) | BIT(0))
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/* BMP180 specific registers */
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#define BMP180_REG_OUT_XLSB 0xF8
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#define BMP180_REG_OUT_LSB 0xF7
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#define BMP180_REG_OUT_MSB 0xF6
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#define BMP180_REG_CALIB_START 0xAA
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#define BMP180_REG_CALIB_COUNT 22
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#define BMP180_MEAS_SCO BIT(5)
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#define BMP180_MEAS_TEMP (0x0E | BMP180_MEAS_SCO)
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#define BMP180_MEAS_PRESS_X(oss) ((oss) << 6 | 0x14 | BMP180_MEAS_SCO)
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#define BMP180_MEAS_PRESS_1X BMP180_MEAS_PRESS_X(0)
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#define BMP180_MEAS_PRESS_2X BMP180_MEAS_PRESS_X(1)
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#define BMP180_MEAS_PRESS_4X BMP180_MEAS_PRESS_X(2)
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#define BMP180_MEAS_PRESS_8X BMP180_MEAS_PRESS_X(3)
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/* BMP180 and BMP280 common registers */
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#define BMP280_REG_CTRL_MEAS 0xF4
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#define BMP280_REG_RESET 0xE0
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#define BMP280_REG_ID 0xD0
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#define BMP180_CHIP_ID 0x55
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#define BMP280_CHIP_ID 0x58
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#define BME280_CHIP_ID 0x60
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#define BMP280_SOFT_RESET_VAL 0xB6
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/* BMP280 register skipped special values */
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#define BMP280_TEMP_SKIPPED 0x80000
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#define BMP280_PRESS_SKIPPED 0x80000
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#define BMP280_HUMIDITY_SKIPPED 0x8000
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/* Regmap configurations */
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extern const struct regmap_config bmp180_regmap_config;
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extern const struct regmap_config bmp280_regmap_config;
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/* Probe called from different transports */
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int bmp280_common_probe(struct device *dev,
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struct regmap *regmap,
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unsigned int chip,
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const char *name,
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int irq);
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int bmp280_common_remove(struct device *dev);
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/* PM ops */
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extern const struct dev_pm_ops bmp280_dev_pm_ops;
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