2 * STMicroelectronics pressures driver
4 * Copyright 2013 STMicroelectronics Inc.
6 * Denis Ciocca <denis.ciocca@st.com>
8 * Licensed under the GPL-2.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/errno.h>
15 #include <linux/types.h>
16 #include <linux/mutex.h>
17 #include <linux/interrupt.h>
18 #include <linux/i2c.h>
19 #include <linux/gpio.h>
20 #include <linux/irq.h>
21 #include <linux/delay.h>
22 #include <linux/iio/iio.h>
23 #include <linux/iio/sysfs.h>
24 #include <linux/iio/trigger.h>
25 #include <linux/iio/buffer.h>
26 #include <asm/unaligned.h>
28 #include <linux/iio/common/st_sensors.h>
29 #include "st_pressure.h"
31 #define ST_PRESS_LSB_PER_MBAR 4096UL
32 #define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
33 ST_PRESS_LSB_PER_MBAR)
34 #define ST_PRESS_LSB_PER_CELSIUS 480UL
35 #define ST_PRESS_CELSIUS_NANO_SCALE (1000000000UL / \
36 ST_PRESS_LSB_PER_CELSIUS)
37 #define ST_PRESS_NUMBER_DATA_CHANNELS 1
40 #define ST_PRESS_FS_AVL_1260MB 1260
42 #define ST_PRESS_1_OUT_XL_ADDR 0x28
43 #define ST_TEMP_1_OUT_L_ADDR 0x2b
45 /* CUSTOM VALUES FOR LPS331AP SENSOR */
46 #define ST_PRESS_LPS331AP_WAI_EXP 0xbb
47 #define ST_PRESS_LPS331AP_ODR_ADDR 0x20
48 #define ST_PRESS_LPS331AP_ODR_MASK 0x70
49 #define ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL 0x01
50 #define ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL 0x05
51 #define ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL 0x06
52 #define ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL 0x07
53 #define ST_PRESS_LPS331AP_PW_ADDR 0x20
54 #define ST_PRESS_LPS331AP_PW_MASK 0x80
55 #define ST_PRESS_LPS331AP_FS_ADDR 0x23
56 #define ST_PRESS_LPS331AP_FS_MASK 0x30
57 #define ST_PRESS_LPS331AP_FS_AVL_1260_VAL 0x00
58 #define ST_PRESS_LPS331AP_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
59 #define ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
60 #define ST_PRESS_LPS331AP_BDU_ADDR 0x20
61 #define ST_PRESS_LPS331AP_BDU_MASK 0x04
62 #define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22
63 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04
64 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20
65 #define ST_PRESS_LPS331AP_IHL_IRQ_ADDR 0x22
66 #define ST_PRESS_LPS331AP_IHL_IRQ_MASK 0x80
67 #define ST_PRESS_LPS331AP_OD_IRQ_ADDR 0x22
68 #define ST_PRESS_LPS331AP_OD_IRQ_MASK 0x40
69 #define ST_PRESS_LPS331AP_MULTIREAD_BIT true
70 #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
72 /* CUSTOM VALUES FOR LPS001WP SENSOR */
73 #define ST_PRESS_LPS001WP_WAI_EXP 0xba
74 #define ST_PRESS_LPS001WP_ODR_ADDR 0x20
75 #define ST_PRESS_LPS001WP_ODR_MASK 0x30
76 #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
77 #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
78 #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
79 #define ST_PRESS_LPS001WP_PW_ADDR 0x20
80 #define ST_PRESS_LPS001WP_PW_MASK 0x40
81 #define ST_PRESS_LPS001WP_BDU_ADDR 0x20
82 #define ST_PRESS_LPS001WP_BDU_MASK 0x04
83 #define ST_PRESS_LPS001WP_MULTIREAD_BIT true
84 #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
85 #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
87 /* CUSTOM VALUES FOR LPS25H SENSOR */
88 #define ST_PRESS_LPS25H_WAI_EXP 0xbd
89 #define ST_PRESS_LPS25H_ODR_ADDR 0x20
90 #define ST_PRESS_LPS25H_ODR_MASK 0x70
91 #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
92 #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
93 #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
94 #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
95 #define ST_PRESS_LPS25H_PW_ADDR 0x20
96 #define ST_PRESS_LPS25H_PW_MASK 0x80
97 #define ST_PRESS_LPS25H_FS_ADDR 0x00
98 #define ST_PRESS_LPS25H_FS_MASK 0x00
99 #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
100 #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
101 #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
102 #define ST_PRESS_LPS25H_BDU_ADDR 0x20
103 #define ST_PRESS_LPS25H_BDU_MASK 0x04
104 #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
105 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
106 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
107 #define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22
108 #define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80
109 #define ST_PRESS_LPS25H_OD_IRQ_ADDR 0x22
110 #define ST_PRESS_LPS25H_OD_IRQ_MASK 0x40
111 #define ST_PRESS_LPS25H_MULTIREAD_BIT true
112 #define ST_PRESS_LPS25H_TEMP_OFFSET 42500
113 #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
114 #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
116 static const struct iio_chan_spec st_press_1_channels[] = {
118 .type = IIO_PRESSURE,
119 .channel2 = IIO_NO_MOD,
120 .address = ST_PRESS_1_OUT_XL_ADDR,
121 .scan_index = ST_SENSORS_SCAN_X,
126 .endianness = IIO_LE,
128 .info_mask_separate =
129 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
134 .channel2 = IIO_NO_MOD,
135 .address = ST_TEMP_1_OUT_L_ADDR,
141 .endianness = IIO_LE,
143 .info_mask_separate =
144 BIT(IIO_CHAN_INFO_RAW) |
145 BIT(IIO_CHAN_INFO_SCALE) |
146 BIT(IIO_CHAN_INFO_OFFSET),
149 IIO_CHAN_SOFT_TIMESTAMP(1)
152 static const struct iio_chan_spec st_press_lps001wp_channels[] = {
154 .type = IIO_PRESSURE,
155 .channel2 = IIO_NO_MOD,
156 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
157 .scan_index = ST_SENSORS_SCAN_X,
162 .endianness = IIO_LE,
164 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
169 .channel2 = IIO_NO_MOD,
170 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
176 .endianness = IIO_LE,
178 .info_mask_separate =
179 BIT(IIO_CHAN_INFO_RAW) |
180 BIT(IIO_CHAN_INFO_OFFSET),
183 IIO_CHAN_SOFT_TIMESTAMP(1)
186 static const struct st_sensor_settings st_press_sensors_settings[] = {
188 .wai = ST_PRESS_LPS331AP_WAI_EXP,
189 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
190 .sensors_supported = {
191 [0] = LPS331AP_PRESS_DEV_NAME,
193 .ch = (struct iio_chan_spec *)st_press_1_channels,
194 .num_ch = ARRAY_SIZE(st_press_1_channels),
196 .addr = ST_PRESS_LPS331AP_ODR_ADDR,
197 .mask = ST_PRESS_LPS331AP_ODR_MASK,
199 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
200 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
201 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
202 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
206 .addr = ST_PRESS_LPS331AP_PW_ADDR,
207 .mask = ST_PRESS_LPS331AP_PW_MASK,
208 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
209 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
212 .addr = ST_PRESS_LPS331AP_FS_ADDR,
213 .mask = ST_PRESS_LPS331AP_FS_MASK,
216 .num = ST_PRESS_FS_AVL_1260MB,
217 .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
218 .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
219 .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
224 .addr = ST_PRESS_LPS331AP_BDU_ADDR,
225 .mask = ST_PRESS_LPS331AP_BDU_MASK,
228 .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
229 .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
230 .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
231 .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR,
232 .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK,
233 .addr_od = ST_PRESS_LPS331AP_OD_IRQ_ADDR,
234 .mask_od = ST_PRESS_LPS331AP_OD_IRQ_MASK,
235 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
237 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
241 .wai = ST_PRESS_LPS001WP_WAI_EXP,
242 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
243 .sensors_supported = {
244 [0] = LPS001WP_PRESS_DEV_NAME,
246 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
247 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
249 .addr = ST_PRESS_LPS001WP_ODR_ADDR,
250 .mask = ST_PRESS_LPS001WP_ODR_MASK,
252 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
253 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
254 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
258 .addr = ST_PRESS_LPS001WP_PW_ADDR,
259 .mask = ST_PRESS_LPS001WP_PW_MASK,
260 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
261 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
267 .addr = ST_PRESS_LPS001WP_BDU_ADDR,
268 .mask = ST_PRESS_LPS001WP_BDU_MASK,
273 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
277 .wai = ST_PRESS_LPS25H_WAI_EXP,
278 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
279 .sensors_supported = {
280 [0] = LPS25H_PRESS_DEV_NAME,
282 .ch = (struct iio_chan_spec *)st_press_1_channels,
283 .num_ch = ARRAY_SIZE(st_press_1_channels),
285 .addr = ST_PRESS_LPS25H_ODR_ADDR,
286 .mask = ST_PRESS_LPS25H_ODR_MASK,
288 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
289 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
290 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
291 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
295 .addr = ST_PRESS_LPS25H_PW_ADDR,
296 .mask = ST_PRESS_LPS25H_PW_MASK,
297 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
298 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
301 .addr = ST_PRESS_LPS25H_FS_ADDR,
302 .mask = ST_PRESS_LPS25H_FS_MASK,
305 .num = ST_PRESS_FS_AVL_1260MB,
306 .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
307 .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
308 .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
313 .addr = ST_PRESS_LPS25H_BDU_ADDR,
314 .mask = ST_PRESS_LPS25H_BDU_MASK,
317 .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
318 .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
319 .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
320 .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR,
321 .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK,
322 .addr_od = ST_PRESS_LPS25H_OD_IRQ_ADDR,
323 .mask_od = ST_PRESS_LPS25H_OD_IRQ_MASK,
324 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
326 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
331 static int st_press_write_raw(struct iio_dev *indio_dev,
332 struct iio_chan_spec const *ch,
340 case IIO_CHAN_INFO_SAMP_FREQ:
343 mutex_lock(&indio_dev->mlock);
344 err = st_sensors_set_odr(indio_dev, val);
345 mutex_unlock(&indio_dev->mlock);
352 static int st_press_read_raw(struct iio_dev *indio_dev,
353 struct iio_chan_spec const *ch, int *val,
354 int *val2, long mask)
357 struct st_sensor_data *press_data = iio_priv(indio_dev);
360 case IIO_CHAN_INFO_RAW:
361 err = st_sensors_read_info_raw(indio_dev, ch, val);
366 case IIO_CHAN_INFO_SCALE:
371 *val2 = press_data->current_fullscale->gain;
374 *val2 = press_data->current_fullscale->gain2;
381 return IIO_VAL_INT_PLUS_NANO;
382 case IIO_CHAN_INFO_OFFSET:
393 return IIO_VAL_FRACTIONAL;
394 case IIO_CHAN_INFO_SAMP_FREQ:
395 *val = press_data->odr;
405 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
407 static struct attribute *st_press_attributes[] = {
408 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
412 static const struct attribute_group st_press_attribute_group = {
413 .attrs = st_press_attributes,
416 static const struct iio_info press_info = {
417 .driver_module = THIS_MODULE,
418 .attrs = &st_press_attribute_group,
419 .read_raw = &st_press_read_raw,
420 .write_raw = &st_press_write_raw,
421 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
424 #ifdef CONFIG_IIO_TRIGGER
425 static const struct iio_trigger_ops st_press_trigger_ops = {
426 .owner = THIS_MODULE,
427 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
429 #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
431 #define ST_PRESS_TRIGGER_OPS NULL
434 int st_press_common_probe(struct iio_dev *indio_dev)
436 struct st_sensor_data *press_data = iio_priv(indio_dev);
437 int irq = press_data->get_irq_data_ready(indio_dev);
440 indio_dev->modes = INDIO_DIRECT_MODE;
441 indio_dev->info = &press_info;
442 mutex_init(&press_data->tb.buf_lock);
444 st_sensors_power_enable(indio_dev);
446 err = st_sensors_check_device_support(indio_dev,
447 ARRAY_SIZE(st_press_sensors_settings),
448 st_press_sensors_settings);
452 press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
453 press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
454 indio_dev->channels = press_data->sensor_settings->ch;
455 indio_dev->num_channels = press_data->sensor_settings->num_ch;
457 if (press_data->sensor_settings->fs.addr != 0)
458 press_data->current_fullscale =
459 (struct st_sensor_fullscale_avl *)
460 &press_data->sensor_settings->fs.fs_avl[0];
462 press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
464 /* Some devices don't support a data ready pin. */
465 if (!press_data->dev->platform_data &&
466 press_data->sensor_settings->drdy_irq.addr)
467 press_data->dev->platform_data =
468 (struct st_sensors_platform_data *)&default_press_pdata;
470 err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
474 err = st_press_allocate_ring(indio_dev);
479 err = st_sensors_allocate_trigger(indio_dev,
480 ST_PRESS_TRIGGER_OPS);
482 goto st_press_probe_trigger_error;
485 err = iio_device_register(indio_dev);
487 goto st_press_device_register_error;
489 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
494 st_press_device_register_error:
496 st_sensors_deallocate_trigger(indio_dev);
497 st_press_probe_trigger_error:
498 st_press_deallocate_ring(indio_dev);
502 EXPORT_SYMBOL(st_press_common_probe);
504 void st_press_common_remove(struct iio_dev *indio_dev)
506 struct st_sensor_data *press_data = iio_priv(indio_dev);
508 st_sensors_power_disable(indio_dev);
510 iio_device_unregister(indio_dev);
511 if (press_data->get_irq_data_ready(indio_dev) > 0)
512 st_sensors_deallocate_trigger(indio_dev);
514 st_press_deallocate_ring(indio_dev);
516 EXPORT_SYMBOL(st_press_common_remove);
518 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
519 MODULE_DESCRIPTION("STMicroelectronics pressures driver");
520 MODULE_LICENSE("GPL v2");