1 /* SPDX-License-Identifier: GPL-2.0 */
2 #include <linux/bitops.h>
3 #include <linux/device.h>
4 #include <linux/iio/iio.h>
5 #include <linux/regmap.h>
6 #include <linux/regulator/consumer.h>
9 /* BMP580 specific registers */
10 #define BMP580_REG_CMD 0x7E
11 #define BMP580_REG_EFF_OSR 0x38
12 #define BMP580_REG_ODR_CONFIG 0x37
13 #define BMP580_REG_OSR_CONFIG 0x36
14 #define BMP580_REG_IF_CONFIG 0x13
15 #define BMP580_REG_REV_ID 0x02
16 #define BMP580_REG_CHIP_ID 0x01
17 /* OOR allows to configure a pressure alarm */
18 #define BMP580_REG_OOR_CONFIG 0x35
19 #define BMP580_REG_OOR_RANGE 0x34
20 #define BMP580_REG_OOR_THR_MSB 0x33
21 #define BMP580_REG_OOR_THR_LSB 0x32
22 /* DSP registers (IIR filters) */
23 #define BMP580_REG_DSP_IIR 0x31
24 #define BMP580_REG_DSP_CONFIG 0x30
25 /* NVM access registers */
26 #define BMP580_REG_NVM_DATA_MSB 0x2D
27 #define BMP580_REG_NVM_DATA_LSB 0x2C
28 #define BMP580_REG_NVM_ADDR 0x2B
29 /* Status registers */
30 #define BMP580_REG_STATUS 0x28
31 #define BMP580_REG_INT_STATUS 0x27
32 #define BMP580_REG_CHIP_STATUS 0x11
34 #define BMP580_REG_FIFO_DATA 0x29
35 #define BMP580_REG_PRESS_MSB 0x22
36 #define BMP580_REG_PRESS_LSB 0x21
37 #define BMP580_REG_PRESS_XLSB 0x20
38 #define BMP580_REG_TEMP_MSB 0x1F
39 #define BMP580_REG_TEMP_LSB 0x1E
40 #define BMP580_REG_TEMP_XLSB 0x1D
41 /* FIFO config registers */
42 #define BMP580_REG_FIFO_SEL 0x18
43 #define BMP580_REG_FIFO_COUNT 0x17
44 #define BMP580_REG_FIFO_CONFIG 0x16
45 /* Interruptions config registers */
46 #define BMP580_REG_INT_SOURCE 0x15
47 #define BMP580_REG_INT_CONFIG 0x14
49 #define BMP580_CMD_NOOP 0x00
50 #define BMP580_CMD_EXTMODE_SEQ_0 0x73
51 #define BMP580_CMD_EXTMODE_SEQ_1 0xB4
52 #define BMP580_CMD_EXTMODE_SEQ_2 0x69
53 #define BMP580_CMD_NVM_OP_SEQ_0 0x5D
54 #define BMP580_CMD_NVM_READ_SEQ_1 0xA5
55 #define BMP580_CMD_NVM_WRITE_SEQ_1 0xA0
56 #define BMP580_CMD_SOFT_RESET 0xB6
58 #define BMP580_INT_STATUS_POR_MASK BIT(4)
60 #define BMP580_STATUS_CORE_RDY_MASK BIT(0)
61 #define BMP580_STATUS_NVM_RDY_MASK BIT(1)
62 #define BMP580_STATUS_NVM_ERR_MASK BIT(2)
63 #define BMP580_STATUS_NVM_CMD_ERR_MASK BIT(3)
65 #define BMP580_OSR_PRESS_MASK GENMASK(5, 3)
66 #define BMP580_OSR_TEMP_MASK GENMASK(2, 0)
67 #define BMP580_OSR_PRESS_EN BIT(6)
68 #define BMP580_EFF_OSR_PRESS_MASK GENMASK(5, 3)
69 #define BMP580_EFF_OSR_TEMP_MASK GENMASK(2, 0)
70 #define BMP580_EFF_OSR_VALID_ODR BIT(7)
72 #define BMP580_ODR_MASK GENMASK(6, 2)
73 #define BMP580_MODE_MASK GENMASK(1, 0)
74 #define BMP580_MODE_SLEEP 0
75 #define BMP580_MODE_NORMAL 1
76 #define BMP580_MODE_FORCED 2
77 #define BMP580_MODE_CONTINOUS 3
78 #define BMP580_ODR_DEEPSLEEP_DIS BIT(7)
80 #define BMP580_DSP_COMP_MASK GENMASK(1, 0)
81 #define BMP580_DSP_COMP_DIS 0
82 #define BMP580_DSP_TEMP_COMP_EN 1
84 * In section 7.27 of datasheet, modes 2 and 3 are technically the same.
85 * Pressure compensation means also enabling temperature compensation
87 #define BMP580_DSP_PRESS_COMP_EN 2
88 #define BMP580_DSP_PRESS_TEMP_COMP_EN 3
89 #define BMP580_DSP_IIR_FORCED_FLUSH BIT(2)
90 #define BMP580_DSP_SHDW_IIR_TEMP_EN BIT(3)
91 #define BMP580_DSP_FIFO_IIR_TEMP_EN BIT(4)
92 #define BMP580_DSP_SHDW_IIR_PRESS_EN BIT(5)
93 #define BMP580_DSP_FIFO_IIR_PRESS_EN BIT(6)
94 #define BMP580_DSP_OOR_IIR_PRESS_EN BIT(7)
96 #define BMP580_DSP_IIR_PRESS_MASK GENMASK(5, 3)
97 #define BMP580_DSP_IIR_TEMP_MASK GENMASK(2, 0)
98 #define BMP580_FILTER_OFF 0
99 #define BMP580_FILTER_1X 1
100 #define BMP580_FILTER_3X 2
101 #define BMP580_FILTER_7X 3
102 #define BMP580_FILTER_15X 4
103 #define BMP580_FILTER_31X 5
104 #define BMP580_FILTER_63X 6
105 #define BMP580_FILTER_127X 7
107 #define BMP580_NVM_ROW_ADDR_MASK GENMASK(5, 0)
108 #define BMP580_NVM_PROG_EN BIT(6)
110 #define BMP580_TEMP_SKIPPED 0x7f7f7f
111 #define BMP580_PRESS_SKIPPED 0x7f7f7f
113 /* BMP380 specific registers */
114 #define BMP380_REG_CMD 0x7E
115 #define BMP380_REG_CONFIG 0x1F
116 #define BMP380_REG_ODR 0x1D
117 #define BMP380_REG_OSR 0x1C
118 #define BMP380_REG_POWER_CONTROL 0x1B
119 #define BMP380_REG_IF_CONFIG 0x1A
120 #define BMP380_REG_INT_CONTROL 0x19
121 #define BMP380_REG_INT_STATUS 0x11
122 #define BMP380_REG_EVENT 0x10
123 #define BMP380_REG_STATUS 0x03
124 #define BMP380_REG_ERROR 0x02
125 #define BMP380_REG_ID 0x00
127 #define BMP380_REG_FIFO_CONFIG_1 0x18
128 #define BMP380_REG_FIFO_CONFIG_2 0x17
129 #define BMP380_REG_FIFO_WATERMARK_MSB 0x16
130 #define BMP380_REG_FIFO_WATERMARK_LSB 0x15
131 #define BMP380_REG_FIFO_DATA 0x14
132 #define BMP380_REG_FIFO_LENGTH_MSB 0x13
133 #define BMP380_REG_FIFO_LENGTH_LSB 0x12
135 #define BMP380_REG_SENSOR_TIME_MSB 0x0E
136 #define BMP380_REG_SENSOR_TIME_LSB 0x0D
137 #define BMP380_REG_SENSOR_TIME_XLSB 0x0C
139 #define BMP380_REG_TEMP_MSB 0x09
140 #define BMP380_REG_TEMP_LSB 0x08
141 #define BMP380_REG_TEMP_XLSB 0x07
143 #define BMP380_REG_PRESS_MSB 0x06
144 #define BMP380_REG_PRESS_LSB 0x05
145 #define BMP380_REG_PRESS_XLSB 0x04
147 #define BMP380_REG_CALIB_TEMP_START 0x31
148 #define BMP380_CALIB_REG_COUNT 21
150 #define BMP380_FILTER_MASK GENMASK(3, 1)
151 #define BMP380_FILTER_OFF 0
152 #define BMP380_FILTER_1X 1
153 #define BMP380_FILTER_3X 2
154 #define BMP380_FILTER_7X 3
155 #define BMP380_FILTER_15X 4
156 #define BMP380_FILTER_31X 5
157 #define BMP380_FILTER_63X 6
158 #define BMP380_FILTER_127X 7
160 #define BMP380_OSRS_TEMP_MASK GENMASK(5, 3)
161 #define BMP380_OSRS_PRESS_MASK GENMASK(2, 0)
163 #define BMP380_ODRS_MASK GENMASK(4, 0)
165 #define BMP380_CTRL_SENSORS_MASK GENMASK(1, 0)
166 #define BMP380_CTRL_SENSORS_PRESS_EN BIT(0)
167 #define BMP380_CTRL_SENSORS_TEMP_EN BIT(1)
168 #define BMP380_MODE_MASK GENMASK(5, 4)
169 #define BMP380_MODE_SLEEP 0
170 #define BMP380_MODE_FORCED 1
171 #define BMP380_MODE_NORMAL 3
173 #define BMP380_MIN_TEMP -4000
174 #define BMP380_MAX_TEMP 8500
175 #define BMP380_MIN_PRES 3000000
176 #define BMP380_MAX_PRES 12500000
178 #define BMP380_CMD_NOOP 0x00
179 #define BMP380_CMD_EXTMODE_EN_MID 0x34
180 #define BMP380_CMD_FIFO_FLUSH 0xB0
181 #define BMP380_CMD_SOFT_RESET 0xB6
183 #define BMP380_STATUS_CMD_RDY_MASK BIT(4)
184 #define BMP380_STATUS_DRDY_PRESS_MASK BIT(5)
185 #define BMP380_STATUS_DRDY_TEMP_MASK BIT(6)
187 #define BMP380_ERR_FATAL_MASK BIT(0)
188 #define BMP380_ERR_CMD_MASK BIT(1)
189 #define BMP380_ERR_CONF_MASK BIT(2)
191 #define BMP380_TEMP_SKIPPED 0x800000
192 #define BMP380_PRESS_SKIPPED 0x800000
194 /* BMP280 specific registers */
195 #define BMP280_REG_HUMIDITY_LSB 0xFE
196 #define BMP280_REG_HUMIDITY_MSB 0xFD
197 #define BMP280_REG_TEMP_XLSB 0xFC
198 #define BMP280_REG_TEMP_LSB 0xFB
199 #define BMP280_REG_TEMP_MSB 0xFA
200 #define BMP280_REG_PRESS_XLSB 0xF9
201 #define BMP280_REG_PRESS_LSB 0xF8
202 #define BMP280_REG_PRESS_MSB 0xF7
204 /* Helper mask to truncate excess 4 bits on pressure and temp readings */
205 #define BMP280_MEAS_TRIM_MASK GENMASK(24, 4)
207 #define BMP280_REG_CONFIG 0xF5
208 #define BMP280_REG_CTRL_MEAS 0xF4
209 #define BMP280_REG_STATUS 0xF3
210 #define BMP280_REG_CTRL_HUMIDITY 0xF2
212 /* Due to non linear mapping, and data sizes we can't do a bulk read */
213 #define BMP280_REG_COMP_H1 0xA1
214 #define BMP280_REG_COMP_H2 0xE1
215 #define BMP280_REG_COMP_H3 0xE3
216 #define BMP280_REG_COMP_H4 0xE4
217 #define BMP280_REG_COMP_H5 0xE5
218 #define BMP280_REG_COMP_H6 0xE7
220 #define BMP280_REG_COMP_TEMP_START 0x88
221 #define BMP280_COMP_TEMP_REG_COUNT 6
223 #define BMP280_REG_COMP_PRESS_START 0x8E
224 #define BMP280_COMP_PRESS_REG_COUNT 18
226 #define BMP280_COMP_H5_MASK GENMASK(15, 4)
228 #define BMP280_CONTIGUOUS_CALIB_REGS (BMP280_COMP_TEMP_REG_COUNT + \
229 BMP280_COMP_PRESS_REG_COUNT)
231 #define BMP280_FILTER_MASK GENMASK(4, 2)
232 #define BMP280_FILTER_OFF 0
233 #define BMP280_FILTER_2X 1
234 #define BMP280_FILTER_4X 2
235 #define BMP280_FILTER_8X 3
236 #define BMP280_FILTER_16X 4
238 #define BMP280_OSRS_HUMIDITY_MASK GENMASK(2, 0)
239 #define BMP280_OSRS_HUMIDITY_SKIP 0
240 #define BMP280_OSRS_HUMIDITY_1X 1
241 #define BMP280_OSRS_HUMIDITY_2X 2
242 #define BMP280_OSRS_HUMIDITY_4X 3
243 #define BMP280_OSRS_HUMIDITY_8X 4
244 #define BMP280_OSRS_HUMIDITY_16X 5
246 #define BMP280_OSRS_TEMP_MASK GENMASK(7, 5)
247 #define BMP280_OSRS_TEMP_SKIP 0
248 #define BMP280_OSRS_TEMP_1X 1
249 #define BMP280_OSRS_TEMP_2X 2
250 #define BMP280_OSRS_TEMP_4X 3
251 #define BMP280_OSRS_TEMP_8X 4
252 #define BMP280_OSRS_TEMP_16X 5
254 #define BMP280_OSRS_PRESS_MASK GENMASK(4, 2)
255 #define BMP280_OSRS_PRESS_SKIP 0
256 #define BMP280_OSRS_PRESS_1X 1
257 #define BMP280_OSRS_PRESS_2X 2
258 #define BMP280_OSRS_PRESS_4X 3
259 #define BMP280_OSRS_PRESS_8X 4
260 #define BMP280_OSRS_PRESS_16X 5
262 #define BMP280_MODE_MASK GENMASK(1, 0)
263 #define BMP280_MODE_SLEEP 0
264 #define BMP280_MODE_FORCED 1
265 #define BMP280_MODE_NORMAL 3
267 /* BMP180 specific registers */
268 #define BMP180_REG_OUT_XLSB 0xF8
269 #define BMP180_REG_OUT_LSB 0xF7
270 #define BMP180_REG_OUT_MSB 0xF6
272 #define BMP180_REG_CALIB_START 0xAA
273 #define BMP180_REG_CALIB_COUNT 22
275 #define BMP180_MEAS_CTRL_MASK GENMASK(4, 0)
276 #define BMP180_MEAS_TEMP 0x0E
277 #define BMP180_MEAS_PRESS 0x14
278 #define BMP180_MEAS_SCO BIT(5)
279 #define BMP180_OSRS_PRESS_MASK GENMASK(7, 6)
280 #define BMP180_MEAS_PRESS_1X 0
281 #define BMP180_MEAS_PRESS_2X 1
282 #define BMP180_MEAS_PRESS_4X 2
283 #define BMP180_MEAS_PRESS_8X 3
285 /* BMP180 and BMP280 common registers */
286 #define BMP280_REG_CTRL_MEAS 0xF4
287 #define BMP280_REG_RESET 0xE0
288 #define BMP280_REG_ID 0xD0
290 #define BMP380_CHIP_ID 0x50
291 #define BMP580_CHIP_ID 0x50
292 #define BMP580_CHIP_ID_ALT 0x51
293 #define BMP180_CHIP_ID 0x55
294 #define BMP280_CHIP_ID 0x58
295 #define BME280_CHIP_ID 0x60
296 #define BMP280_SOFT_RESET_VAL 0xB6
298 /* BMP280 register skipped special values */
299 #define BMP280_TEMP_SKIPPED 0x80000
300 #define BMP280_PRESS_SKIPPED 0x80000
301 #define BMP280_HUMIDITY_SKIPPED 0x8000
303 /* Core exported structs */
305 static const char *const bmp280_supply_names[] = {
309 #define BMP280_NUM_SUPPLIES ARRAY_SIZE(bmp280_supply_names)
311 struct bmp180_calib {
325 /* See datasheet Section 4.2.2. */
326 struct bmp280_calib {
347 /* See datasheet Section 3.11.1. */
348 struct bmp380_calib {
368 struct regmap *regmap;
369 struct completion done;
371 const struct bmp280_chip_info *chip_info;
373 struct bmp180_calib bmp180;
374 struct bmp280_calib bmp280;
375 struct bmp380_calib bmp380;
377 struct regulator_bulk_data supplies[BMP280_NUM_SUPPLIES];
378 unsigned int start_up_time; /* in microseconds */
380 /* log of base 2 of oversampling rate */
381 u8 oversampling_press;
382 u8 oversampling_temp;
383 u8 oversampling_humid;
387 * BMP380 devices introduce sampling frequency configuration. See
388 * datasheet sections 3.3.3. and 4.3.19 for more details.
390 * BMx280 devices allowed indirect configuration of sampling frequency
391 * changing the t_standby duration between measurements, as detailed on
392 * section 3.6.3 of the datasheet.
397 * Carryover value from temperature conversion, used in pressure
403 * DMA (thus cache coherency maintenance) may require the
404 * transfer buffers to live in their own cache lines.
407 /* Sensor data buffer */
409 /* Calibration data buffers */
410 __le16 bmp280_cal_buf[BMP280_CONTIGUOUS_CALIB_REGS / 2];
411 __be16 bmp180_cal_buf[BMP180_REG_CALIB_COUNT / 2];
412 u8 bmp380_cal_buf[BMP380_CALIB_REG_COUNT];
413 /* Miscellaneous, endianess-aware data buffers */
416 } __aligned(IIO_DMA_MINALIGN);
419 struct bmp280_chip_info {
421 const unsigned int chip_id;
423 const struct regmap_config *regmap_config;
425 const struct iio_chan_spec *channels;
427 unsigned int start_up_time;
429 const int *oversampling_temp_avail;
430 int num_oversampling_temp_avail;
431 int oversampling_temp_default;
433 const int *oversampling_press_avail;
434 int num_oversampling_press_avail;
435 int oversampling_press_default;
437 const int *oversampling_humid_avail;
438 int num_oversampling_humid_avail;
439 int oversampling_humid_default;
441 const int *iir_filter_coeffs_avail;
442 int num_iir_filter_coeffs_avail;
443 int iir_filter_coeff_default;
445 const int (*sampling_freq_avail)[2];
446 int num_sampling_freq_avail;
447 int sampling_freq_default;
449 int (*chip_config)(struct bmp280_data *);
450 int (*read_temp)(struct bmp280_data *, int *, int *);
451 int (*read_press)(struct bmp280_data *, int *, int *);
452 int (*read_humid)(struct bmp280_data *, int *, int *);
453 int (*read_calib)(struct bmp280_data *);
454 int (*preinit)(struct bmp280_data *);
457 /* Chip infos for each variant */
458 extern const struct bmp280_chip_info bmp180_chip_info;
459 extern const struct bmp280_chip_info bmp280_chip_info;
460 extern const struct bmp280_chip_info bme280_chip_info;
461 extern const struct bmp280_chip_info bmp380_chip_info;
462 extern const struct bmp280_chip_info bmp580_chip_info;
464 /* Regmap configurations */
465 extern const struct regmap_config bmp180_regmap_config;
466 extern const struct regmap_config bmp280_regmap_config;
467 extern const struct regmap_config bmp380_regmap_config;
468 extern const struct regmap_config bmp580_regmap_config;
470 /* Probe called from different transports */
471 int bmp280_common_probe(struct device *dev,
472 struct regmap *regmap,
473 const struct bmp280_chip_info *,
478 extern const struct dev_pm_ops bmp280_dev_pm_ops;