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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>
27
28#include <linux/iio/common/st_sensors.h>
29#include "st_pressure.h"
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96
97#define MCELSIUS_PER_CELSIUS 1000
98
99
100#define ST_PRESS_LSB_PER_MBAR 4096UL
101#define ST_PRESS_KPASCAL_NANO_SCALE (100000000UL / \
102 ST_PRESS_LSB_PER_MBAR)
103
104
105#define ST_PRESS_LSB_PER_CELSIUS 480UL
106#define ST_PRESS_MILLI_CELSIUS_OFFSET 42500UL
107
108
109#define ST_PRESS_FS_AVL_1100MB 1100
110#define ST_PRESS_FS_AVL_1260MB 1260
111
112#define ST_PRESS_1_OUT_XL_ADDR 0x28
113#define ST_TEMP_1_OUT_L_ADDR 0x2b
114
115
116#define ST_PRESS_LPS001WP_LSB_PER_MBAR 16UL
117
118#define ST_PRESS_LPS001WP_LSB_PER_CELSIUS 64UL
119
120#define ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN \
121 (100000000UL / ST_PRESS_LPS001WP_LSB_PER_MBAR)
122
123#define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
124#define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
125
126
127#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
128#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
129
130
131#define ST_PRESS_LPS22HB_LSB_PER_CELSIUS 100UL
132
133static const struct iio_chan_spec st_press_1_channels[] = {
134 {
135 .type = IIO_PRESSURE,
136 .address = ST_PRESS_1_OUT_XL_ADDR,
137 .scan_index = 0,
138 .scan_type = {
139 .sign = 's',
140 .realbits = 24,
141 .storagebits = 32,
142 .endianness = IIO_LE,
143 },
144 .info_mask_separate =
145 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
146 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
147 },
148 {
149 .type = IIO_TEMP,
150 .address = ST_TEMP_1_OUT_L_ADDR,
151 .scan_index = 1,
152 .scan_type = {
153 .sign = 's',
154 .realbits = 16,
155 .storagebits = 16,
156 .endianness = IIO_LE,
157 },
158 .info_mask_separate =
159 BIT(IIO_CHAN_INFO_RAW) |
160 BIT(IIO_CHAN_INFO_SCALE) |
161 BIT(IIO_CHAN_INFO_OFFSET),
162 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
163 },
164 IIO_CHAN_SOFT_TIMESTAMP(2)
165};
166
167static const struct iio_chan_spec st_press_lps001wp_channels[] = {
168 {
169 .type = IIO_PRESSURE,
170 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
171 .scan_index = 0,
172 .scan_type = {
173 .sign = 's',
174 .realbits = 16,
175 .storagebits = 16,
176 .endianness = IIO_LE,
177 },
178 .info_mask_separate =
179 BIT(IIO_CHAN_INFO_RAW) |
180 BIT(IIO_CHAN_INFO_SCALE),
181 },
182 {
183 .type = IIO_TEMP,
184 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
185 .scan_index = 1,
186 .scan_type = {
187 .sign = 's',
188 .realbits = 16,
189 .storagebits = 16,
190 .endianness = IIO_LE,
191 },
192 .info_mask_separate =
193 BIT(IIO_CHAN_INFO_RAW) |
194 BIT(IIO_CHAN_INFO_SCALE),
195 },
196 IIO_CHAN_SOFT_TIMESTAMP(2)
197};
198
199static const struct iio_chan_spec st_press_lps22hb_channels[] = {
200 {
201 .type = IIO_PRESSURE,
202 .address = ST_PRESS_1_OUT_XL_ADDR,
203 .scan_index = 0,
204 .scan_type = {
205 .sign = 's',
206 .realbits = 24,
207 .storagebits = 32,
208 .endianness = IIO_LE,
209 },
210 .info_mask_separate =
211 BIT(IIO_CHAN_INFO_RAW) |
212 BIT(IIO_CHAN_INFO_SCALE),
213 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
214 },
215 {
216 .type = IIO_TEMP,
217 .address = ST_TEMP_1_OUT_L_ADDR,
218 .scan_index = 1,
219 .scan_type = {
220 .sign = 's',
221 .realbits = 16,
222 .storagebits = 16,
223 .endianness = IIO_LE,
224 },
225 .info_mask_separate =
226 BIT(IIO_CHAN_INFO_RAW) |
227 BIT(IIO_CHAN_INFO_SCALE),
228 .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
229 },
230 IIO_CHAN_SOFT_TIMESTAMP(2)
231};
232
233static const struct st_sensor_settings st_press_sensors_settings[] = {
234 {
235
236
237
238
239
240 .wai = 0xbb,
241 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
242 .sensors_supported = {
243 [0] = LPS331AP_PRESS_DEV_NAME,
244 },
245 .ch = (struct iio_chan_spec *)st_press_1_channels,
246 .num_ch = ARRAY_SIZE(st_press_1_channels),
247 .odr = {
248 .addr = 0x20,
249 .mask = 0x70,
250 .odr_avl = {
251 { .hz = 1, .value = 0x01 },
252 { .hz = 7, .value = 0x05 },
253 { .hz = 13, .value = 0x06 },
254 { .hz = 25, .value = 0x07 },
255 },
256 },
257 .pw = {
258 .addr = 0x20,
259 .mask = 0x80,
260 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
261 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
262 },
263 .fs = {
264 .addr = 0x23,
265 .mask = 0x30,
266 .fs_avl = {
267
268
269
270
271 [0] = {
272 .num = ST_PRESS_FS_AVL_1260MB,
273 .gain = ST_PRESS_KPASCAL_NANO_SCALE,
274 .gain2 = ST_PRESS_LSB_PER_CELSIUS,
275 },
276 },
277 },
278 .bdu = {
279 .addr = 0x20,
280 .mask = 0x04,
281 },
282 .drdy_irq = {
283 .addr = 0x22,
284 .mask_int1 = 0x04,
285 .mask_int2 = 0x20,
286 .addr_ihl = 0x22,
287 .mask_ihl = 0x80,
288 .addr_od = 0x22,
289 .mask_od = 0x40,
290 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
291 },
292 .multi_read_bit = true,
293 .bootime = 2,
294 },
295 {
296
297
298
299 .wai = 0xba,
300 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
301 .sensors_supported = {
302 [0] = LPS001WP_PRESS_DEV_NAME,
303 },
304 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
305 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
306 .odr = {
307 .addr = 0x20,
308 .mask = 0x30,
309 .odr_avl = {
310 { .hz = 1, .value = 0x01 },
311 { .hz = 7, .value = 0x02 },
312 { .hz = 13, .value = 0x03 },
313 },
314 },
315 .pw = {
316 .addr = 0x20,
317 .mask = 0x40,
318 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
319 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
320 },
321 .fs = {
322 .fs_avl = {
323
324
325
326
327 [0] = {
328 .num = ST_PRESS_FS_AVL_1100MB,
329 .gain = ST_PRESS_LPS001WP_FS_AVL_PRESS_GAIN,
330 .gain2 = ST_PRESS_LPS001WP_LSB_PER_CELSIUS,
331 },
332 },
333 },
334 .bdu = {
335 .addr = 0x20,
336 .mask = 0x04,
337 },
338 .drdy_irq = {
339 .addr = 0,
340 },
341 .multi_read_bit = true,
342 .bootime = 2,
343 },
344 {
345
346
347
348
349
350 .wai = 0xbd,
351 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
352 .sensors_supported = {
353 [0] = LPS25H_PRESS_DEV_NAME,
354 },
355 .ch = (struct iio_chan_spec *)st_press_1_channels,
356 .num_ch = ARRAY_SIZE(st_press_1_channels),
357 .odr = {
358 .addr = 0x20,
359 .mask = 0x70,
360 .odr_avl = {
361 { .hz = 1, .value = 0x01 },
362 { .hz = 7, .value = 0x02 },
363 { .hz = 13, .value = 0x03 },
364 { .hz = 25, .value = 0x04 },
365 },
366 },
367 .pw = {
368 .addr = 0x20,
369 .mask = 0x80,
370 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
371 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
372 },
373 .fs = {
374 .fs_avl = {
375
376
377
378
379 [0] = {
380 .num = ST_PRESS_FS_AVL_1260MB,
381 .gain = ST_PRESS_KPASCAL_NANO_SCALE,
382 .gain2 = ST_PRESS_LSB_PER_CELSIUS,
383 },
384 },
385 },
386 .bdu = {
387 .addr = 0x20,
388 .mask = 0x04,
389 },
390 .drdy_irq = {
391 .addr = 0x23,
392 .mask_int1 = 0x01,
393 .mask_int2 = 0x10,
394 .addr_ihl = 0x22,
395 .mask_ihl = 0x80,
396 .addr_od = 0x22,
397 .mask_od = 0x40,
398 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
399 },
400 .multi_read_bit = true,
401 .bootime = 2,
402 },
403 {
404
405
406
407
408
409 .wai = 0xb1,
410 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
411 .sensors_supported = {
412 [0] = LPS22HB_PRESS_DEV_NAME,
413 },
414 .ch = (struct iio_chan_spec *)st_press_lps22hb_channels,
415 .num_ch = ARRAY_SIZE(st_press_lps22hb_channels),
416 .odr = {
417 .addr = 0x10,
418 .mask = 0x70,
419 .odr_avl = {
420 { .hz = 1, .value = 0x01 },
421 { .hz = 10, .value = 0x02 },
422 { .hz = 25, .value = 0x03 },
423 { .hz = 50, .value = 0x04 },
424 { .hz = 75, .value = 0x05 },
425 },
426 },
427 .pw = {
428 .addr = 0x10,
429 .mask = 0x70,
430 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
431 },
432 .fs = {
433 .fs_avl = {
434
435
436
437
438 [0] = {
439 .num = ST_PRESS_FS_AVL_1260MB,
440 .gain = ST_PRESS_KPASCAL_NANO_SCALE,
441 .gain2 = ST_PRESS_LPS22HB_LSB_PER_CELSIUS,
442 },
443 },
444 },
445 .bdu = {
446 .addr = 0x10,
447 .mask = 0x02,
448 },
449 .drdy_irq = {
450 .addr = 0x12,
451 .mask_int1 = 0x04,
452 .mask_int2 = 0x08,
453 .addr_ihl = 0x12,
454 .mask_ihl = 0x80,
455 .addr_od = 0x12,
456 .mask_od = 0x40,
457 .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
458 },
459 .multi_read_bit = false,
460 .bootime = 2,
461 },
462};
463
464static int st_press_write_raw(struct iio_dev *indio_dev,
465 struct iio_chan_spec const *ch,
466 int val,
467 int val2,
468 long mask)
469{
470 int err;
471
472 switch (mask) {
473 case IIO_CHAN_INFO_SAMP_FREQ:
474 if (val2)
475 return -EINVAL;
476 mutex_lock(&indio_dev->mlock);
477 err = st_sensors_set_odr(indio_dev, val);
478 mutex_unlock(&indio_dev->mlock);
479 return err;
480 default:
481 return -EINVAL;
482 }
483}
484
485static int st_press_read_raw(struct iio_dev *indio_dev,
486 struct iio_chan_spec const *ch, int *val,
487 int *val2, long mask)
488{
489 int err;
490 struct st_sensor_data *press_data = iio_priv(indio_dev);
491
492 switch (mask) {
493 case IIO_CHAN_INFO_RAW:
494 err = st_sensors_read_info_raw(indio_dev, ch, val);
495 if (err < 0)
496 goto read_error;
497
498 return IIO_VAL_INT;
499 case IIO_CHAN_INFO_SCALE:
500 switch (ch->type) {
501 case IIO_PRESSURE:
502 *val = 0;
503 *val2 = press_data->current_fullscale->gain;
504 return IIO_VAL_INT_PLUS_NANO;
505 case IIO_TEMP:
506 *val = MCELSIUS_PER_CELSIUS;
507 *val2 = press_data->current_fullscale->gain2;
508 return IIO_VAL_FRACTIONAL;
509 default:
510 err = -EINVAL;
511 goto read_error;
512 }
513
514 case IIO_CHAN_INFO_OFFSET:
515 switch (ch->type) {
516 case IIO_TEMP:
517 *val = ST_PRESS_MILLI_CELSIUS_OFFSET *
518 press_data->current_fullscale->gain2;
519 *val2 = MCELSIUS_PER_CELSIUS;
520 break;
521 default:
522 err = -EINVAL;
523 goto read_error;
524 }
525
526 return IIO_VAL_FRACTIONAL;
527 case IIO_CHAN_INFO_SAMP_FREQ:
528 *val = press_data->odr;
529 return IIO_VAL_INT;
530 default:
531 return -EINVAL;
532 }
533
534read_error:
535 return err;
536}
537
538static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
539
540static struct attribute *st_press_attributes[] = {
541 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
542 NULL,
543};
544
545static const struct attribute_group st_press_attribute_group = {
546 .attrs = st_press_attributes,
547};
548
549static const struct iio_info press_info = {
550 .driver_module = THIS_MODULE,
551 .attrs = &st_press_attribute_group,
552 .read_raw = &st_press_read_raw,
553 .write_raw = &st_press_write_raw,
554 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
555};
556
557#ifdef CONFIG_IIO_TRIGGER
558static const struct iio_trigger_ops st_press_trigger_ops = {
559 .owner = THIS_MODULE,
560 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
561 .validate_device = st_sensors_validate_device,
562};
563#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
564#else
565#define ST_PRESS_TRIGGER_OPS NULL
566#endif
567
568int st_press_common_probe(struct iio_dev *indio_dev)
569{
570 struct st_sensor_data *press_data = iio_priv(indio_dev);
571 struct st_sensors_platform_data *pdata =
572 (struct st_sensors_platform_data *)press_data->dev->platform_data;
573 int irq = press_data->get_irq_data_ready(indio_dev);
574 int err;
575
576 indio_dev->modes = INDIO_DIRECT_MODE;
577 indio_dev->info = &press_info;
578 mutex_init(&press_data->tb.buf_lock);
579
580 err = st_sensors_power_enable(indio_dev);
581 if (err)
582 return err;
583
584 err = st_sensors_check_device_support(indio_dev,
585 ARRAY_SIZE(st_press_sensors_settings),
586 st_press_sensors_settings);
587 if (err < 0)
588 goto st_press_power_off;
589
590
591
592
593
594
595
596 press_data->num_data_channels = press_data->sensor_settings->num_ch - 1;
597 press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
598 indio_dev->channels = press_data->sensor_settings->ch;
599 indio_dev->num_channels = press_data->sensor_settings->num_ch;
600
601 press_data->current_fullscale =
602 (struct st_sensor_fullscale_avl *)
603 &press_data->sensor_settings->fs.fs_avl[0];
604
605 press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
606
607
608 if (!pdata && press_data->sensor_settings->drdy_irq.addr)
609 pdata = (struct st_sensors_platform_data *)&default_press_pdata;
610
611 err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
612 if (err < 0)
613 goto st_press_power_off;
614
615 err = st_press_allocate_ring(indio_dev);
616 if (err < 0)
617 goto st_press_power_off;
618
619 if (irq > 0) {
620 err = st_sensors_allocate_trigger(indio_dev,
621 ST_PRESS_TRIGGER_OPS);
622 if (err < 0)
623 goto st_press_probe_trigger_error;
624 }
625
626 err = iio_device_register(indio_dev);
627 if (err)
628 goto st_press_device_register_error;
629
630 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
631 indio_dev->name);
632
633 return err;
634
635st_press_device_register_error:
636 if (irq > 0)
637 st_sensors_deallocate_trigger(indio_dev);
638st_press_probe_trigger_error:
639 st_press_deallocate_ring(indio_dev);
640st_press_power_off:
641 st_sensors_power_disable(indio_dev);
642
643 return err;
644}
645EXPORT_SYMBOL(st_press_common_probe);
646
647void st_press_common_remove(struct iio_dev *indio_dev)
648{
649 struct st_sensor_data *press_data = iio_priv(indio_dev);
650
651 st_sensors_power_disable(indio_dev);
652
653 iio_device_unregister(indio_dev);
654 if (press_data->get_irq_data_ready(indio_dev) > 0)
655 st_sensors_deallocate_trigger(indio_dev);
656
657 st_press_deallocate_ring(indio_dev);
658}
659EXPORT_SYMBOL(st_press_common_remove);
660
661MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
662MODULE_DESCRIPTION("STMicroelectronics pressures driver");
663MODULE_LICENSE("GPL v2");
664