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Bluetooth: hci_uart: Use generic functionality from Broadcom module
[linux/fpc-iii.git] / drivers / iio / pressure / st_pressure_core.c
blob97baf40d424bd599687b124062081364f94b487e
1 /*
2 * STMicroelectronics pressures driver
3 *
4 * Copyright 2013 STMicroelectronics Inc.
5 *
6 * Denis Ciocca <denis.ciocca@st.com>
7 *
8 * Licensed under the GPL-2.
9 */
10
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 /* FULLSCALE */
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 /* 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_MULTIREAD_BIT true
66 #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500
67
68 /* CUSTOM VALUES FOR LPS001WP SENSOR */
69 #define ST_PRESS_LPS001WP_WAI_EXP 0xba
70 #define ST_PRESS_LPS001WP_ODR_ADDR 0x20
71 #define ST_PRESS_LPS001WP_ODR_MASK 0x30
72 #define ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL 0x01
73 #define ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL 0x02
74 #define ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL 0x03
75 #define ST_PRESS_LPS001WP_PW_ADDR 0x20
76 #define ST_PRESS_LPS001WP_PW_MASK 0x40
77 #define ST_PRESS_LPS001WP_BDU_ADDR 0x20
78 #define ST_PRESS_LPS001WP_BDU_MASK 0x04
79 #define ST_PRESS_LPS001WP_MULTIREAD_BIT true
80 #define ST_PRESS_LPS001WP_OUT_L_ADDR 0x28
81 #define ST_TEMP_LPS001WP_OUT_L_ADDR 0x2a
82
83 /* CUSTOM VALUES FOR LPS25H SENSOR */
84 #define ST_PRESS_LPS25H_WAI_EXP 0xbd
85 #define ST_PRESS_LPS25H_ODR_ADDR 0x20
86 #define ST_PRESS_LPS25H_ODR_MASK 0x70
87 #define ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL 0x01
88 #define ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL 0x02
89 #define ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL 0x03
90 #define ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL 0x04
91 #define ST_PRESS_LPS25H_PW_ADDR 0x20
92 #define ST_PRESS_LPS25H_PW_MASK 0x80
93 #define ST_PRESS_LPS25H_FS_ADDR 0x00
94 #define ST_PRESS_LPS25H_FS_MASK 0x00
95 #define ST_PRESS_LPS25H_FS_AVL_1260_VAL 0x00
96 #define ST_PRESS_LPS25H_FS_AVL_1260_GAIN ST_PRESS_KPASCAL_NANO_SCALE
97 #define ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN ST_PRESS_CELSIUS_NANO_SCALE
98 #define ST_PRESS_LPS25H_BDU_ADDR 0x20
99 #define ST_PRESS_LPS25H_BDU_MASK 0x04
100 #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23
101 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01
102 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10
103 #define ST_PRESS_LPS25H_MULTIREAD_BIT true
104 #define ST_PRESS_LPS25H_TEMP_OFFSET 42500
105 #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28
106 #define ST_TEMP_LPS25H_OUT_L_ADDR 0x2b
107
108 static const struct iio_chan_spec st_press_1_channels[] = {
109 {
110 .type = IIO_PRESSURE,
111 .channel2 = IIO_NO_MOD,
112 .address = ST_PRESS_1_OUT_XL_ADDR,
113 .scan_index = ST_SENSORS_SCAN_X,
114 .scan_type = {
115 .sign = 'u',
116 .realbits = 24,
117 .storagebits = 24,
118 .endianness = IIO_LE,
119 },
120 .info_mask_separate =
121 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
122 .modified = 0,
123 },
124 {
125 .type = IIO_TEMP,
126 .channel2 = IIO_NO_MOD,
127 .address = ST_TEMP_1_OUT_L_ADDR,
128 .scan_index = -1,
129 .scan_type = {
130 .sign = 'u',
131 .realbits = 16,
132 .storagebits = 16,
133 .endianness = IIO_LE,
134 },
135 .info_mask_separate =
136 BIT(IIO_CHAN_INFO_RAW) |
137 BIT(IIO_CHAN_INFO_SCALE) |
138 BIT(IIO_CHAN_INFO_OFFSET),
139 .modified = 0,
140 },
141 IIO_CHAN_SOFT_TIMESTAMP(1)
142 };
143
144 static const struct iio_chan_spec st_press_lps001wp_channels[] = {
145 {
146 .type = IIO_PRESSURE,
147 .channel2 = IIO_NO_MOD,
148 .address = ST_PRESS_LPS001WP_OUT_L_ADDR,
149 .scan_index = ST_SENSORS_SCAN_X,
150 .scan_type = {
151 .sign = 'u',
152 .realbits = 16,
153 .storagebits = 16,
154 .endianness = IIO_LE,
155 },
156 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
157 .modified = 0,
158 },
159 {
160 .type = IIO_TEMP,
161 .channel2 = IIO_NO_MOD,
162 .address = ST_TEMP_LPS001WP_OUT_L_ADDR,
163 .scan_index = -1,
164 .scan_type = {
165 .sign = 'u',
166 .realbits = 16,
167 .storagebits = 16,
168 .endianness = IIO_LE,
169 },
170 .info_mask_separate =
171 BIT(IIO_CHAN_INFO_RAW) |
172 BIT(IIO_CHAN_INFO_OFFSET),
173 .modified = 0,
174 },
175 IIO_CHAN_SOFT_TIMESTAMP(1)
176 };
177
178 static const struct st_sensor_settings st_press_sensors_settings[] = {
179 {
180 .wai = ST_PRESS_LPS331AP_WAI_EXP,
181 .sensors_supported = {
182 [0] = LPS331AP_PRESS_DEV_NAME,
183 },
184 .ch = (struct iio_chan_spec *)st_press_1_channels,
185 .num_ch = ARRAY_SIZE(st_press_1_channels),
186 .odr = {
187 .addr = ST_PRESS_LPS331AP_ODR_ADDR,
188 .mask = ST_PRESS_LPS331AP_ODR_MASK,
189 .odr_avl = {
190 { 1, ST_PRESS_LPS331AP_ODR_AVL_1HZ_VAL, },
191 { 7, ST_PRESS_LPS331AP_ODR_AVL_7HZ_VAL, },
192 { 13, ST_PRESS_LPS331AP_ODR_AVL_13HZ_VAL, },
193 { 25, ST_PRESS_LPS331AP_ODR_AVL_25HZ_VAL, },
194 },
195 },
196 .pw = {
197 .addr = ST_PRESS_LPS331AP_PW_ADDR,
198 .mask = ST_PRESS_LPS331AP_PW_MASK,
199 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
200 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
201 },
202 .fs = {
203 .addr = ST_PRESS_LPS331AP_FS_ADDR,
204 .mask = ST_PRESS_LPS331AP_FS_MASK,
205 .fs_avl = {
206 [0] = {
207 .num = ST_PRESS_FS_AVL_1260MB,
208 .value = ST_PRESS_LPS331AP_FS_AVL_1260_VAL,
209 .gain = ST_PRESS_LPS331AP_FS_AVL_1260_GAIN,
210 .gain2 = ST_PRESS_LPS331AP_FS_AVL_TEMP_GAIN,
211 },
212 },
213 },
214 .bdu = {
215 .addr = ST_PRESS_LPS331AP_BDU_ADDR,
216 .mask = ST_PRESS_LPS331AP_BDU_MASK,
217 },
218 .drdy_irq = {
219 .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR,
220 .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK,
221 .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK,
222 },
223 .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT,
224 .bootime = 2,
225 },
226 {
227 .wai = ST_PRESS_LPS001WP_WAI_EXP,
228 .sensors_supported = {
229 [0] = LPS001WP_PRESS_DEV_NAME,
230 },
231 .ch = (struct iio_chan_spec *)st_press_lps001wp_channels,
232 .num_ch = ARRAY_SIZE(st_press_lps001wp_channels),
233 .odr = {
234 .addr = ST_PRESS_LPS001WP_ODR_ADDR,
235 .mask = ST_PRESS_LPS001WP_ODR_MASK,
236 .odr_avl = {
237 { 1, ST_PRESS_LPS001WP_ODR_AVL_1HZ_VAL, },
238 { 7, ST_PRESS_LPS001WP_ODR_AVL_7HZ_VAL, },
239 { 13, ST_PRESS_LPS001WP_ODR_AVL_13HZ_VAL, },
240 },
241 },
242 .pw = {
243 .addr = ST_PRESS_LPS001WP_PW_ADDR,
244 .mask = ST_PRESS_LPS001WP_PW_MASK,
245 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
246 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
247 },
248 .fs = {
249 .addr = 0,
250 },
251 .bdu = {
252 .addr = ST_PRESS_LPS001WP_BDU_ADDR,
253 .mask = ST_PRESS_LPS001WP_BDU_MASK,
254 },
255 .drdy_irq = {
256 .addr = 0,
257 },
258 .multi_read_bit = ST_PRESS_LPS001WP_MULTIREAD_BIT,
259 .bootime = 2,
260 },
261 {
262 .wai = ST_PRESS_LPS25H_WAI_EXP,
263 .sensors_supported = {
264 [0] = LPS25H_PRESS_DEV_NAME,
265 },
266 .ch = (struct iio_chan_spec *)st_press_1_channels,
267 .num_ch = ARRAY_SIZE(st_press_1_channels),
268 .odr = {
269 .addr = ST_PRESS_LPS25H_ODR_ADDR,
270 .mask = ST_PRESS_LPS25H_ODR_MASK,
271 .odr_avl = {
272 { 1, ST_PRESS_LPS25H_ODR_AVL_1HZ_VAL, },
273 { 7, ST_PRESS_LPS25H_ODR_AVL_7HZ_VAL, },
274 { 13, ST_PRESS_LPS25H_ODR_AVL_13HZ_VAL, },
275 { 25, ST_PRESS_LPS25H_ODR_AVL_25HZ_VAL, },
276 },
277 },
278 .pw = {
279 .addr = ST_PRESS_LPS25H_PW_ADDR,
280 .mask = ST_PRESS_LPS25H_PW_MASK,
281 .value_on = ST_SENSORS_DEFAULT_POWER_ON_VALUE,
282 .value_off = ST_SENSORS_DEFAULT_POWER_OFF_VALUE,
283 },
284 .fs = {
285 .addr = ST_PRESS_LPS25H_FS_ADDR,
286 .mask = ST_PRESS_LPS25H_FS_MASK,
287 .fs_avl = {
288 [0] = {
289 .num = ST_PRESS_FS_AVL_1260MB,
290 .value = ST_PRESS_LPS25H_FS_AVL_1260_VAL,
291 .gain = ST_PRESS_LPS25H_FS_AVL_1260_GAIN,
292 .gain2 = ST_PRESS_LPS25H_FS_AVL_TEMP_GAIN,
293 },
294 },
295 },
296 .bdu = {
297 .addr = ST_PRESS_LPS25H_BDU_ADDR,
298 .mask = ST_PRESS_LPS25H_BDU_MASK,
299 },
300 .drdy_irq = {
301 .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR,
302 .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK,
303 .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK,
304 },
305 .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT,
306 .bootime = 2,
307 },
308 };
309
310 static int st_press_write_raw(struct iio_dev *indio_dev,
311 struct iio_chan_spec const *ch,
312 int val,
313 int val2,
314 long mask)
315 {
316 int err;
317
318 switch (mask) {
319 case IIO_CHAN_INFO_SAMP_FREQ:
320 if (val2)
321 return -EINVAL;
322 mutex_lock(&indio_dev->mlock);
323 err = st_sensors_set_odr(indio_dev, val);
324 mutex_unlock(&indio_dev->mlock);
325 return err;
326 default:
327 return -EINVAL;
328 }
329 }
330
331 static int st_press_read_raw(struct iio_dev *indio_dev,
332 struct iio_chan_spec const *ch, int *val,
333 int *val2, long mask)
334 {
335 int err;
336 struct st_sensor_data *press_data = iio_priv(indio_dev);
337
338 switch (mask) {
339 case IIO_CHAN_INFO_RAW:
340 err = st_sensors_read_info_raw(indio_dev, ch, val);
341 if (err < 0)
342 goto read_error;
343
344 return IIO_VAL_INT;
345 case IIO_CHAN_INFO_SCALE:
346 *val = 0;
347
348 switch (ch->type) {
349 case IIO_PRESSURE:
350 *val2 = press_data->current_fullscale->gain;
351 break;
352 case IIO_TEMP:
353 *val2 = press_data->current_fullscale->gain2;
354 break;
355 default:
356 err = -EINVAL;
357 goto read_error;
358 }
359
360 return IIO_VAL_INT_PLUS_NANO;
361 case IIO_CHAN_INFO_OFFSET:
362 switch (ch->type) {
363 case IIO_TEMP:
364 *val = 425;
365 *val2 = 10;
366 break;
367 default:
368 err = -EINVAL;
369 goto read_error;
370 }
371
372 return IIO_VAL_FRACTIONAL;
373 case IIO_CHAN_INFO_SAMP_FREQ:
374 *val = press_data->odr;
375 return IIO_VAL_INT;
376 default:
377 return -EINVAL;
378 }
379
380 read_error:
381 return err;
382 }
383
384 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
385
386 static struct attribute *st_press_attributes[] = {
387 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
388 NULL,
389 };
390
391 static const struct attribute_group st_press_attribute_group = {
392 .attrs = st_press_attributes,
393 };
394
395 static const struct iio_info press_info = {
396 .driver_module = THIS_MODULE,
397 .attrs = &st_press_attribute_group,
398 .read_raw = &st_press_read_raw,
399 .write_raw = &st_press_write_raw,
400 };
401
402 #ifdef CONFIG_IIO_TRIGGER
403 static const struct iio_trigger_ops st_press_trigger_ops = {
404 .owner = THIS_MODULE,
405 .set_trigger_state = ST_PRESS_TRIGGER_SET_STATE,
406 };
407 #define ST_PRESS_TRIGGER_OPS (&st_press_trigger_ops)
408 #else
409 #define ST_PRESS_TRIGGER_OPS NULL
410 #endif
411
412 int st_press_common_probe(struct iio_dev *indio_dev)
413 {
414 struct st_sensor_data *press_data = iio_priv(indio_dev);
415 int irq = press_data->get_irq_data_ready(indio_dev);
416 int err;
417
418 indio_dev->modes = INDIO_DIRECT_MODE;
419 indio_dev->info = &press_info;
420
421 st_sensors_power_enable(indio_dev);
422
423 err = st_sensors_check_device_support(indio_dev,
424 ARRAY_SIZE(st_press_sensors_settings),
425 st_press_sensors_settings);
426 if (err < 0)
427 return err;
428
429 press_data->num_data_channels = ST_PRESS_NUMBER_DATA_CHANNELS;
430 press_data->multiread_bit = press_data->sensor_settings->multi_read_bit;
431 indio_dev->channels = press_data->sensor_settings->ch;
432 indio_dev->num_channels = press_data->sensor_settings->num_ch;
433
434 if (press_data->sensor_settings->fs.addr != 0)
435 press_data->current_fullscale =
436 (struct st_sensor_fullscale_avl *)
437 &press_data->sensor_settings->fs.fs_avl[0];
438
439 press_data->odr = press_data->sensor_settings->odr.odr_avl[0].hz;
440
441 /* Some devices don't support a data ready pin. */
442 if (!press_data->dev->platform_data &&
443 press_data->sensor_settings->drdy_irq.addr)
444 press_data->dev->platform_data =
445 (struct st_sensors_platform_data *)&default_press_pdata;
446
447 err = st_sensors_init_sensor(indio_dev, press_data->dev->platform_data);
448 if (err < 0)
449 return err;
450
451 err = st_press_allocate_ring(indio_dev);
452 if (err < 0)
453 return err;
454
455 if (irq > 0) {
456 err = st_sensors_allocate_trigger(indio_dev,
457 ST_PRESS_TRIGGER_OPS);
458 if (err < 0)
459 goto st_press_probe_trigger_error;
460 }
461
462 err = iio_device_register(indio_dev);
463 if (err)
464 goto st_press_device_register_error;
465
466 dev_info(&indio_dev->dev, "registered pressure sensor %s\n",
467 indio_dev->name);
468
469 return err;
470
471 st_press_device_register_error:
472 if (irq > 0)
473 st_sensors_deallocate_trigger(indio_dev);
474 st_press_probe_trigger_error:
475 st_press_deallocate_ring(indio_dev);
476
477 return err;
478 }
479 EXPORT_SYMBOL(st_press_common_probe);
480
481 void st_press_common_remove(struct iio_dev *indio_dev)
482 {
483 struct st_sensor_data *press_data = iio_priv(indio_dev);
484
485 st_sensors_power_disable(indio_dev);
486
487 iio_device_unregister(indio_dev);
488 if (press_data->get_irq_data_ready(indio_dev) > 0)
489 st_sensors_deallocate_trigger(indio_dev);
490
491 st_press_deallocate_ring(indio_dev);
492 }
493 EXPORT_SYMBOL(st_press_common_remove);
494
495 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
496 MODULE_DESCRIPTION("STMicroelectronics pressures driver");
497 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support