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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"
30
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
38
39
40#define ST_PRESS_FS_AVL_1260MB 1260
41
42#define ST_PRESS_1_OUT_XL_ADDR 0x28
43#define ST_TEMP_1_OUT_L_ADDR 0x2b
44
45
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_MULTIREAD_BIT true
68#define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
69
70
71#define ST_PRESS_LPS001WP_WAI_EXP 0xba
72#define ST_PRESS_LPS001WP_ODR_ADDR 0x20
73#define ST_PRESS_LPS001WP_ODR_MASK 0x30
74#define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
75#define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
76#define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
77#define ST_PRESS_LPS001WP_PW_ADDR 0x20
78#define ST_PRESS_LPS001WP_PW_MASK 0x40
79#define ST_PRESS_LPS001WP_BDU_ADDR 0x20
80#define ST_PRESS_LPS001WP_BDU_MASK 0x04
81#define ST_PRESS_LPS001WP_MULTIREAD_BIT true
82#define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
83#define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
84
85
86#define ST_PRESS_LPS25H_WAI_EXP 0xbd
87#define ST_PRESS_LPS25H_ODR_ADDR 0x20
88#define ST_PRESS_LPS25H_ODR_MASK 0x70
89#define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
90#define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
91#define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
92#define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
93#define ST_PRESS_LPS25H_PW_ADDR 0x20
94#define ST_PRESS_LPS25H_PW_MASK 0x80
95#define ST_PRESS_LPS25H_FS_ADDR 0x00
96#define ST_PRESS_LPS25H_FS_MASK 0x00
97#define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
98#define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
99#define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
100#define ST_PRESS_LPS25H_BDU_ADDR 0x20
101#define ST_PRESS_LPS25H_BDU_MASK 0x04
102#define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
103#define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
104#define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
105#define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22
106#define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80
107#define ST_PRESS_LPS25H_MULTIREAD_BIT true
108#define ST_PRESS_LPS25H_TEMP_OFFSET 42500
109#define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
110#define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
111
112static const struct iio_chan_spec st_press_1_channels[] = {
113 {
114 .type = IIO_PRESSURE,
115 .channel2 = IIO_NO_MOD,
116 .address = ST_PRESS_1_OUT_XL_ADDR,
117 .scan_index = ST_SENSORS_SCAN_X,
118 .scan_type = {
119 .sign = 'u',
120 .realbits = 24,
121 .storagebits = 24,
122 .endianness = IIO_LE,
123 },
124 .info_mask_separate =
125 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
126 .modified = 0,
127 },
128 {
129 .type = IIO_TEMP,
130 .channel2 = IIO_NO_MOD,
131 .address = ST_TEMP_1_OUT_L_ADDR,
132 .scan_index = -1,
133 .scan_type = {
134 .sign = 'u',
135 .realbits = 16,
136 .storagebits = 16,
137 .endianness = IIO_LE,
138 },
139 .info_mask_separate =
140 BIT(IIO_CHAN_INFO_RAW) |
141 BIT(IIO_CHAN_INFO_SCALE) |
142 BIT(IIO_CHAN_INFO_OFFSET),
143 .modified = 0,
144 },
145 IIO_CHAN_SOFT_TIMESTAMP(1)
146};
147
148static const struct iio_chan_spec st_press_lps001wp_channels[] = {
149 {
150 .type = IIO_PRESSURE,
151 .channel2 = IIO_NO_MOD,
152 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
153 .scan_index = ST_SENSORS_SCAN_X,
154 .scan_type = {
155 .sign = 'u',
156 .realbits = 16,
157 .storagebits = 16,
158 .endianness = IIO_LE,
159 },
160 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
161 .modified = 0,
162 },
163 {
164 .type = IIO_TEMP,
165 .channel2 = IIO_NO_MOD,
166 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
167 .scan_index = -1,
168 .scan_type = {
169 .sign = 'u',
170 .realbits = 16,
171 .storagebits = 16,
172 .endianness = IIO_LE,
173 },
174 .info_mask_separate =
175 BIT(IIO_CHAN_INFO_RAW) |
176 BIT(IIO_CHAN_INFO_OFFSET),
177 .modified = 0,
178 },
179 IIO_CHAN_SOFT_TIMESTAMP(1)
180};
181
182static const struct st_sensor_settings st_press_sensors_settings[] = {
183 {
184 .wai = ST_PRESS_LPS331AP_WAI_EXP,
185 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
186 .sensors_supported = {
187 [0] = LPS331AP_PRESS_DEV_NAME,
188 },
189 .ch = (struct iio_chan_spec *)st_press_1_channels,
190 .num_ch = ARRAY_SIZE(st_press_1_channels),
191 .odr = {
192 .addr = ST_PRESS_LPS331AP_ODR_ADDR,
193 .mask = ST_PRESS_LPS331AP_ODR_MASK,
194 .odr_avl = {
195 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
196 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
197 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
198 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
199 },
200 },
201 .pw = {
202 .addr = ST_PRESS_LPS331AP_PW_ADDR,
203 .mask = ST_PRESS_LPS331AP_PW_MASK,
204 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
205 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
206 },
207 .fs = {
208 .addr = ST_PRESS_LPS331AP_FS_ADDR,
209 .mask = ST_PRESS_LPS331AP_FS_MASK,
210 .fs_avl = {
211 [0] = {
212 .num = ST_PRESS_FS_AVL_1260MB,
213 .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
214 .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
215 .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
216 },
217 },
218 },
219 .bdu = {
220 .addr = ST_PRESS_LPS331AP_BDU_ADDR,
221 .mask = ST_PRESS_LPS331AP_BDU_MASK,
222 },
223 .drdy_irq = {
224 .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
225 .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
226 .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
227 .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR,
228 .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK,
229 },
230 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
231 .bootime = 2,
232 },
233 {
234 .wai = ST_PRESS_LPS001WP_WAI_EXP,
235 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
236 .sensors_supported = {
237 [0] = LPS001WP_PRESS_DEV_NAME,
238 },
239 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
240 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
241 .odr = {
242 .addr = ST_PRESS_LPS001WP_ODR_ADDR,
243 .mask = ST_PRESS_LPS001WP_ODR_MASK,
244 .odr_avl = {
245 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
246 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
247 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
248 },
249 },
250 .pw = {
251 .addr = ST_PRESS_LPS001WP_PW_ADDR,
252 .mask = ST_PRESS_LPS001WP_PW_MASK,
253 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
254 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
255 },
256 .fs = {
257 .addr = 0,
258 },
259 .bdu = {
260 .addr = ST_PRESS_LPS001WP_BDU_ADDR,
261 .mask = ST_PRESS_LPS001WP_BDU_MASK,
262 },
263 .drdy_irq = {
264 .addr = 0,
265 },
266 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
267 .bootime = 2,
268 },
269 {
270 .wai = ST_PRESS_LPS25H_WAI_EXP,
271 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
272 .sensors_supported = {
273 [0] = LPS25H_PRESS_DEV_NAME,
274 },
275 .ch = (struct iio_chan_spec *)st_press_1_channels,
276 .num_ch = ARRAY_SIZE(st_press_1_channels),
277 .odr = {
278 .addr = ST_PRESS_LPS25H_ODR_ADDR,
279 .mask = ST_PRESS_LPS25H_ODR_MASK,
280 .odr_avl = {
281 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
282 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
283 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
284 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
285 },
286 },
287 .pw = {
288 .addr = ST_PRESS_LPS25H_PW_ADDR,
289 .mask = ST_PRESS_LPS25H_PW_MASK,
290 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
291 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
292 },
293 .fs = {
294 .addr = ST_PRESS_LPS25H_FS_ADDR,
295 .mask = ST_PRESS_LPS25H_FS_MASK,
296 .fs_avl = {
297 [0] = {
298 .num = ST_PRESS_FS_AVL_1260MB,
299 .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
300 .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
301 .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
302 },
303 },
304 },
305 .bdu = {
306 .addr = ST_PRESS_LPS25H_BDU_ADDR,
307 .mask = ST_PRESS_LPS25H_BDU_MASK,
308 },
309 .drdy_irq = {
310 .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
311 .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
312 .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
313 .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR,
314 .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK,
315 },
316 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
317 .bootime = 2,
318 },
319};
320
321static int st_press_write_raw(struct iio_dev *indio_dev,
322 struct iio_chan_spec const *ch,
323 int val,
324 int val2,
325 long mask)
326{
327 int err;
328
329 switch (mask) {
330 case IIO_CHAN_INFO_SAMP_FREQ:
331 if (val2)
332 return -EINVAL;
333 mutex_lock(&indio_dev->mlock);
334 err = st_sensors_set_odr(indio_dev, val);
335 mutex_unlock(&indio_dev->mlock);
336 return err;
337 default:
338 return -EINVAL;
339 }
340}
341
342static int st_press_read_raw(struct iio_dev *indio_dev,
343 struct iio_chan_spec const *ch, int *val,
344 int *val2, long mask)
345{
346 int err;
347 struct st_sensor_data *press_data = iio_priv(indio_dev);
348
349 switch (mask) {
350 case IIO_CHAN_INFO_RAW:
351 err = st_sensors_read_info_raw(indio_dev, ch, val);
352 if (err < 0)
353 goto read_error;
354
355 return IIO_VAL_INT;
356 case IIO_CHAN_INFO_SCALE:
357 *val = 0;
358
359 switch (ch->type) {
360 case IIO_PRESSURE:
361 *val2 = press_data->current_fullscale->gain;
362 break;
363 case IIO_TEMP:
364 *val2 = press_data->current_fullscale->gain2;
365 break;
366 default:
367 err = -EINVAL;
368 goto read_error;
369 }
370
371 return IIO_VAL_INT_PLUS_NANO;
372 case IIO_CHAN_INFO_OFFSET:
373 switch (ch->type) {
374 case IIO_TEMP:
375 *val = 425;
376 *val2 = 10;
377 break;
378 default:
379 err = -EINVAL;
380 goto read_error;
381 }
382
383 return IIO_VAL_FRACTIONAL;
384 case IIO_CHAN_INFO_SAMP_FREQ:
385 *val = press_data->odr;
386 return IIO_VAL_INT;
387 default:
388 return -EINVAL;
389 }
390
391read_error:
392 return err;
393}
394
395static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
396
397static struct attribute *st_press_attributes[] = {
398 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
399 NULL,
400};
401
402static const struct attribute_group st_press_attribute_group = {
403 .attrs = st_press_attributes,
404};
405
406static const struct iio_info press_info = {
407 .driver_module = THIS_MODULE,
408 .attrs = &st_press_attribute_group,
409 .read_raw = &st_press_read_raw,
410 .write_raw = &st_press_write_raw,
411 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
412};
413
414#ifdef CONFIG_IIO_TRIGGER
415static const struct iio_trigger_ops st_press_trigger_ops = {
416 .owner = THIS_MODULE,
417 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
418};
419#define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
420#else
421#define ST_PRESS_TRIGGER_OPS NULL
422#endif
423
424int st_press_common_probe(struct iio_dev *indio_dev)
425{
426 struct st_sensor_data *press_data = iio_priv(indio_dev);
427 int irq = press_data->get_irq_data_ready(indio_dev);
428 int err;
429
430 indio_dev->modes = INDIO_DIRECT_MODE;
431 indio_dev->info = &press_info;
432 mutex_init(&press_data->tb.buf_lock);
433
434 st_sensors_power_enable(indio_dev);
435
436 err = st_sensors_check_device_support(indio_dev,
437 ARRAY_SIZE(st_press_sensors_settings),
438 st_press_sensors_settings);
439 if (err < 0)
440 return err;
441
442 press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
443 press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
444 indio_dev->channels = press_data->sensor_settings->ch;
445 indio_dev->num_channels = press_data->sensor_settings->num_ch;
446
447 if (press_data->sensor_settings->fs.addr != 0)
448 press_data->current_fullscale =
449 (struct st_sensor_fullscale_avl *)
450 &press_data->sensor_settings->fs.fs_avl[0];
451
452 press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
453
454
455 if (!press_data->dev->platform_data &&
456 press_data->sensor_settings->drdy_irq.addr)
457 press_data->dev->platform_data =
458 (struct st_sensors_platform_data *)&default_press_pdata;
459
460 err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
461 if (err < 0)
462 return err;
463
464 err = st_press_allocate_ring(indio_dev);
465 if (err < 0)
466 return err;
467
468 if (irq > 0) {
469 err = st_sensors_allocate_trigger(indio_dev,
470 ST_PRESS_TRIGGER_OPS);
471 if (err < 0)
472 goto st_press_probe_trigger_error;
473 }
474
475 err = iio_device_register(indio_dev);
476 if (err)
477 goto st_press_device_register_error;
478
479 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
480 indio_dev->name);
481
482 return err;
483
484st_press_device_register_error:
485 if (irq > 0)
486 st_sensors_deallocate_trigger(indio_dev);
487st_press_probe_trigger_error:
488 st_press_deallocate_ring(indio_dev);
489
490 return err;
491}
492EXPORT_SYMBOL(st_press_common_probe);
493
494void st_press_common_remove(struct iio_dev *indio_dev)
495{
496 struct st_sensor_data *press_data = iio_priv(indio_dev);
497
498 st_sensors_power_disable(indio_dev);
499
500 iio_device_unregister(indio_dev);
501 if (press_data->get_irq_data_ready(indio_dev) > 0)
502 st_sensors_deallocate_trigger(indio_dev);
503
504 st_press_deallocate_ring(indio_dev);
505}
506EXPORT_SYMBOL(st_press_common_remove);
507
508MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
509MODULE_DESCRIPTION("STMicroelectronics pressures driver");
510MODULE_LICENSE("GPL v2");
511
