This source file includes following definitions.
- st_magn_read_raw
- st_magn_write_raw
- st_magn_get_settings
- st_magn_common_probe
- st_magn_common_remove
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10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <linux/errno.h>
14 #include <linux/types.h>
15 #include <linux/interrupt.h>
16 #include <linux/i2c.h>
17 #include <linux/gpio.h>
18 #include <linux/irq.h>
19 #include <linux/delay.h>
20 #include <linux/iio/iio.h>
21 #include <linux/iio/sysfs.h>
22 #include <linux/iio/buffer.h>
23
24 #include <linux/iio/common/st_sensors.h>
25 #include "st_magn.h"
26
27 #define ST_MAGN_NUMBER_DATA_CHANNELS 3
28
29
30 #define ST_MAGN_DEFAULT_OUT_X_H_ADDR 0x03
31 #define ST_MAGN_DEFAULT_OUT_Y_H_ADDR 0x07
32 #define ST_MAGN_DEFAULT_OUT_Z_H_ADDR 0x05
33
34
35 #define ST_MAGN_FS_AVL_1300MG 1300
36 #define ST_MAGN_FS_AVL_1900MG 1900
37 #define ST_MAGN_FS_AVL_2500MG 2500
38 #define ST_MAGN_FS_AVL_4000MG 4000
39 #define ST_MAGN_FS_AVL_4700MG 4700
40 #define ST_MAGN_FS_AVL_5600MG 5600
41 #define ST_MAGN_FS_AVL_8000MG 8000
42 #define ST_MAGN_FS_AVL_8100MG 8100
43 #define ST_MAGN_FS_AVL_12000MG 12000
44 #define ST_MAGN_FS_AVL_15000MG 15000
45 #define ST_MAGN_FS_AVL_16000MG 16000
46
47
48 #define ST_MAGN_2_OUT_X_L_ADDR 0x28
49 #define ST_MAGN_2_OUT_Y_L_ADDR 0x2a
50 #define ST_MAGN_2_OUT_Z_L_ADDR 0x2c
51
52
53 #define ST_MAGN_3_OUT_X_L_ADDR 0x68
54 #define ST_MAGN_3_OUT_Y_L_ADDR 0x6a
55 #define ST_MAGN_3_OUT_Z_L_ADDR 0x6c
56
57 static const struct iio_chan_spec st_magn_16bit_channels[] = {
58 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
59 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
60 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_BE, 16, 16,
61 ST_MAGN_DEFAULT_OUT_X_H_ADDR),
62 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
63 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
64 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_BE, 16, 16,
65 ST_MAGN_DEFAULT_OUT_Y_H_ADDR),
66 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
67 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
68 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_BE, 16, 16,
69 ST_MAGN_DEFAULT_OUT_Z_H_ADDR),
70 IIO_CHAN_SOFT_TIMESTAMP(3)
71 };
72
73 static const struct iio_chan_spec st_magn_2_16bit_channels[] = {
74 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
75 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
76 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
77 ST_MAGN_2_OUT_X_L_ADDR),
78 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
79 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
80 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
81 ST_MAGN_2_OUT_Y_L_ADDR),
82 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
83 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
84 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
85 ST_MAGN_2_OUT_Z_L_ADDR),
86 IIO_CHAN_SOFT_TIMESTAMP(3)
87 };
88
89 static const struct iio_chan_spec st_magn_3_16bit_channels[] = {
90 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
91 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
92 ST_SENSORS_SCAN_X, 1, IIO_MOD_X, 's', IIO_LE, 16, 16,
93 ST_MAGN_3_OUT_X_L_ADDR),
94 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
95 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
96 ST_SENSORS_SCAN_Y, 1, IIO_MOD_Y, 's', IIO_LE, 16, 16,
97 ST_MAGN_3_OUT_Y_L_ADDR),
98 ST_SENSORS_LSM_CHANNELS(IIO_MAGN,
99 BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
100 ST_SENSORS_SCAN_Z, 1, IIO_MOD_Z, 's', IIO_LE, 16, 16,
101 ST_MAGN_3_OUT_Z_L_ADDR),
102 IIO_CHAN_SOFT_TIMESTAMP(3)
103 };
104
105 static const struct st_sensor_settings st_magn_sensors_settings[] = {
106 {
107 .wai = 0,
108 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
109 .sensors_supported = {
110 [0] = LSM303DLH_MAGN_DEV_NAME,
111 },
112 .ch = (struct iio_chan_spec *)st_magn_16bit_channels,
113 .odr = {
114 .addr = 0x00,
115 .mask = 0x1c,
116 .odr_avl = {
117 { .hz = 1, .value = 0x00 },
118 { .hz = 2, .value = 0x01 },
119 { .hz = 3, .value = 0x02 },
120 { .hz = 8, .value = 0x03 },
121 { .hz = 15, .value = 0x04 },
122 { .hz = 30, .value = 0x05 },
123 { .hz = 75, .value = 0x06 },
124
125 },
126 },
127 .pw = {
128 .addr = 0x02,
129 .mask = 0x03,
130 .value_on = 0x00,
131 .value_off = 0x03,
132 },
133 .fs = {
134 .addr = 0x01,
135 .mask = 0xe0,
136 .fs_avl = {
137 [0] = {
138 .num = ST_MAGN_FS_AVL_1300MG,
139 .value = 0x01,
140 .gain = 1100,
141 .gain2 = 980,
142 },
143 [1] = {
144 .num = ST_MAGN_FS_AVL_1900MG,
145 .value = 0x02,
146 .gain = 855,
147 .gain2 = 760,
148 },
149 [2] = {
150 .num = ST_MAGN_FS_AVL_2500MG,
151 .value = 0x03,
152 .gain = 670,
153 .gain2 = 600,
154 },
155 [3] = {
156 .num = ST_MAGN_FS_AVL_4000MG,
157 .value = 0x04,
158 .gain = 450,
159 .gain2 = 400,
160 },
161 [4] = {
162 .num = ST_MAGN_FS_AVL_4700MG,
163 .value = 0x05,
164 .gain = 400,
165 .gain2 = 355,
166 },
167 [5] = {
168 .num = ST_MAGN_FS_AVL_5600MG,
169 .value = 0x06,
170 .gain = 330,
171 .gain2 = 295,
172 },
173 [6] = {
174 .num = ST_MAGN_FS_AVL_8100MG,
175 .value = 0x07,
176 .gain = 230,
177 .gain2 = 205,
178 },
179 },
180 },
181 .multi_read_bit = false,
182 .bootime = 2,
183 },
184 {
185 .wai = 0x3c,
186 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
187 .sensors_supported = {
188 [0] = LSM303DLHC_MAGN_DEV_NAME,
189 [1] = LSM303DLM_MAGN_DEV_NAME,
190 },
191 .ch = (struct iio_chan_spec *)st_magn_16bit_channels,
192 .odr = {
193 .addr = 0x00,
194 .mask = 0x1c,
195 .odr_avl = {
196 { .hz = 1, .value = 0x00 },
197 { .hz = 2, .value = 0x01 },
198 { .hz = 3, .value = 0x02 },
199 { .hz = 8, .value = 0x03 },
200 { .hz = 15, .value = 0x04 },
201 { .hz = 30, .value = 0x05 },
202 { .hz = 75, .value = 0x06 },
203 { .hz = 220, .value = 0x07 },
204 },
205 },
206 .pw = {
207 .addr = 0x02,
208 .mask = 0x03,
209 .value_on = 0x00,
210 .value_off = 0x03,
211 },
212 .fs = {
213 .addr = 0x01,
214 .mask = 0xe0,
215 .fs_avl = {
216 [0] = {
217 .num = ST_MAGN_FS_AVL_1300MG,
218 .value = 0x01,
219 .gain = 909,
220 .gain2 = 1020,
221 },
222 [1] = {
223 .num = ST_MAGN_FS_AVL_1900MG,
224 .value = 0x02,
225 .gain = 1169,
226 .gain2 = 1315,
227 },
228 [2] = {
229 .num = ST_MAGN_FS_AVL_2500MG,
230 .value = 0x03,
231 .gain = 1492,
232 .gain2 = 1666,
233 },
234 [3] = {
235 .num = ST_MAGN_FS_AVL_4000MG,
236 .value = 0x04,
237 .gain = 2222,
238 .gain2 = 2500,
239 },
240 [4] = {
241 .num = ST_MAGN_FS_AVL_4700MG,
242 .value = 0x05,
243 .gain = 2500,
244 .gain2 = 2816,
245 },
246 [5] = {
247 .num = ST_MAGN_FS_AVL_5600MG,
248 .value = 0x06,
249 .gain = 3030,
250 .gain2 = 3389,
251 },
252 [6] = {
253 .num = ST_MAGN_FS_AVL_8100MG,
254 .value = 0x07,
255 .gain = 4347,
256 .gain2 = 4878,
257 },
258 },
259 },
260 .multi_read_bit = false,
261 .bootime = 2,
262 },
263 {
264 .wai = 0x3d,
265 .wai_addr = ST_SENSORS_DEFAULT_WAI_ADDRESS,
266 .sensors_supported = {
267 [0] = LIS3MDL_MAGN_DEV_NAME,
268 [1] = LSM9DS1_MAGN_DEV_NAME,
269 },
270 .ch = (struct iio_chan_spec *)st_magn_2_16bit_channels,
271 .odr = {
272 .addr = 0x20,
273 .mask = 0x1c,
274 .odr_avl = {
275 { .hz = 1, .value = 0x00 },
276 { .hz = 2, .value = 0x01 },
277 { .hz = 3, .value = 0x02 },
278 { .hz = 5, .value = 0x03 },
279 { .hz = 10, .value = 0x04 },
280 { .hz = 20, .value = 0x05 },
281 { .hz = 40, .value = 0x06 },
282 { .hz = 80, .value = 0x07 },
283 },
284 },
285 .pw = {
286 .addr = 0x22,
287 .mask = 0x03,
288 .value_on = 0x00,
289 .value_off = 0x03,
290 },
291 .fs = {
292 .addr = 0x21,
293 .mask = 0x60,
294 .fs_avl = {
295 [0] = {
296 .num = ST_MAGN_FS_AVL_4000MG,
297 .value = 0x00,
298 .gain = 146,
299 },
300 [1] = {
301 .num = ST_MAGN_FS_AVL_8000MG,
302 .value = 0x01,
303 .gain = 292,
304 },
305 [2] = {
306 .num = ST_MAGN_FS_AVL_12000MG,
307 .value = 0x02,
308 .gain = 438,
309 },
310 [3] = {
311 .num = ST_MAGN_FS_AVL_16000MG,
312 .value = 0x03,
313 .gain = 584,
314 },
315 },
316 },
317 .bdu = {
318 .addr = 0x24,
319 .mask = 0x40,
320 },
321 .drdy_irq = {
322
323 .stat_drdy = {
324 .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
325 .mask = 0x07,
326 },
327 },
328 .sim = {
329 .addr = 0x22,
330 .value = BIT(2),
331 },
332 .multi_read_bit = true,
333 .bootime = 2,
334 },
335 {
336 .wai = 0x40,
337 .wai_addr = 0x4f,
338 .sensors_supported = {
339 [0] = LSM303AGR_MAGN_DEV_NAME,
340 [1] = LIS2MDL_MAGN_DEV_NAME,
341 },
342 .ch = (struct iio_chan_spec *)st_magn_3_16bit_channels,
343 .odr = {
344 .addr = 0x60,
345 .mask = 0x0c,
346 .odr_avl = {
347 { .hz = 10, .value = 0x00 },
348 { .hz = 20, .value = 0x01 },
349 { .hz = 50, .value = 0x02 },
350 { .hz = 100, .value = 0x03 },
351 },
352 },
353 .pw = {
354 .addr = 0x60,
355 .mask = 0x03,
356 .value_on = 0x00,
357 .value_off = 0x03,
358 },
359 .fs = {
360 .fs_avl = {
361 [0] = {
362 .num = ST_MAGN_FS_AVL_15000MG,
363 .gain = 1500,
364 },
365 },
366 },
367 .bdu = {
368 .addr = 0x62,
369 .mask = 0x10,
370 },
371 .drdy_irq = {
372 .int1 = {
373 .addr = 0x62,
374 .mask = 0x01,
375 },
376 .stat_drdy = {
377 .addr = 0x67,
378 .mask = 0x07,
379 },
380 },
381 .multi_read_bit = false,
382 .bootime = 2,
383 },
384 };
385
386 static int st_magn_read_raw(struct iio_dev *indio_dev,
387 struct iio_chan_spec const *ch, int *val,
388 int *val2, long mask)
389 {
390 int err;
391 struct st_sensor_data *mdata = iio_priv(indio_dev);
392
393 switch (mask) {
394 case IIO_CHAN_INFO_RAW:
395 err = st_sensors_read_info_raw(indio_dev, ch, val);
396 if (err < 0)
397 goto read_error;
398
399 return IIO_VAL_INT;
400 case IIO_CHAN_INFO_SCALE:
401 *val = 0;
402 if ((ch->scan_index == ST_SENSORS_SCAN_Z) &&
403 (mdata->current_fullscale->gain2 != 0))
404 *val2 = mdata->current_fullscale->gain2;
405 else
406 *val2 = mdata->current_fullscale->gain;
407 return IIO_VAL_INT_PLUS_MICRO;
408 case IIO_CHAN_INFO_SAMP_FREQ:
409 *val = mdata->odr;
410 return IIO_VAL_INT;
411 default:
412 return -EINVAL;
413 }
414
415 read_error:
416 return err;
417 }
418
419 static int st_magn_write_raw(struct iio_dev *indio_dev,
420 struct iio_chan_spec const *chan, int val, int val2, long mask)
421 {
422 int err;
423
424 switch (mask) {
425 case IIO_CHAN_INFO_SCALE:
426 err = st_sensors_set_fullscale_by_gain(indio_dev, val2);
427 break;
428 case IIO_CHAN_INFO_SAMP_FREQ:
429 if (val2)
430 return -EINVAL;
431 mutex_lock(&indio_dev->mlock);
432 err = st_sensors_set_odr(indio_dev, val);
433 mutex_unlock(&indio_dev->mlock);
434 return err;
435 default:
436 err = -EINVAL;
437 }
438
439 return err;
440 }
441
442 static ST_SENSORS_DEV_ATTR_SAMP_FREQ_AVAIL();
443 static ST_SENSORS_DEV_ATTR_SCALE_AVAIL(in_magn_scale_available);
444
445 static struct attribute *st_magn_attributes[] = {
446 &iio_dev_attr_sampling_frequency_available.dev_attr.attr,
447 &iio_dev_attr_in_magn_scale_available.dev_attr.attr,
448 NULL,
449 };
450
451 static const struct attribute_group st_magn_attribute_group = {
452 .attrs = st_magn_attributes,
453 };
454
455 static const struct iio_info magn_info = {
456 .attrs = &st_magn_attribute_group,
457 .read_raw = &st_magn_read_raw,
458 .write_raw = &st_magn_write_raw,
459 .debugfs_reg_access = &st_sensors_debugfs_reg_access,
460 };
461
462 #ifdef CONFIG_IIO_TRIGGER
463 static const struct iio_trigger_ops st_magn_trigger_ops = {
464 .set_trigger_state = ST_MAGN_TRIGGER_SET_STATE,
465 .validate_device = st_sensors_validate_device,
466 };
467 #define ST_MAGN_TRIGGER_OPS (&st_magn_trigger_ops)
468 #else
469 #define ST_MAGN_TRIGGER_OPS NULL
470 #endif
471
472
473
474
475
476
477
478 const struct st_sensor_settings *st_magn_get_settings(const char *name)
479 {
480 int index = st_sensors_get_settings_index(name,
481 st_magn_sensors_settings,
482 ARRAY_SIZE(st_magn_sensors_settings));
483 if (index < 0)
484 return NULL;
485
486 return &st_magn_sensors_settings[index];
487 }
488 EXPORT_SYMBOL(st_magn_get_settings);
489
490 int st_magn_common_probe(struct iio_dev *indio_dev)
491 {
492 struct st_sensor_data *mdata = iio_priv(indio_dev);
493 int err;
494
495 indio_dev->modes = INDIO_DIRECT_MODE;
496 indio_dev->info = &magn_info;
497
498 err = st_sensors_power_enable(indio_dev);
499 if (err)
500 return err;
501
502 err = st_sensors_verify_id(indio_dev);
503 if (err < 0)
504 goto st_magn_power_off;
505
506 mdata->num_data_channels = ST_MAGN_NUMBER_DATA_CHANNELS;
507 indio_dev->channels = mdata->sensor_settings->ch;
508 indio_dev->num_channels = ST_SENSORS_NUMBER_ALL_CHANNELS;
509
510 mdata->current_fullscale = (struct st_sensor_fullscale_avl *)
511 &mdata->sensor_settings->fs.fs_avl[0];
512 mdata->odr = mdata->sensor_settings->odr.odr_avl[0].hz;
513
514 err = st_sensors_init_sensor(indio_dev, NULL);
515 if (err < 0)
516 goto st_magn_power_off;
517
518 err = st_magn_allocate_ring(indio_dev);
519 if (err < 0)
520 goto st_magn_power_off;
521
522 if (mdata->irq > 0) {
523 err = st_sensors_allocate_trigger(indio_dev,
524 ST_MAGN_TRIGGER_OPS);
525 if (err < 0)
526 goto st_magn_probe_trigger_error;
527 }
528
529 err = iio_device_register(indio_dev);
530 if (err)
531 goto st_magn_device_register_error;
532
533 dev_info(&indio_dev->dev, "registered magnetometer %s\n",
534 indio_dev->name);
535
536 return 0;
537
538 st_magn_device_register_error:
539 if (mdata->irq > 0)
540 st_sensors_deallocate_trigger(indio_dev);
541 st_magn_probe_trigger_error:
542 st_magn_deallocate_ring(indio_dev);
543 st_magn_power_off:
544 st_sensors_power_disable(indio_dev);
545
546 return err;
547 }
548 EXPORT_SYMBOL(st_magn_common_probe);
549
550 void st_magn_common_remove(struct iio_dev *indio_dev)
551 {
552 struct st_sensor_data *mdata = iio_priv(indio_dev);
553
554 st_sensors_power_disable(indio_dev);
555
556 iio_device_unregister(indio_dev);
557 if (mdata->irq > 0)
558 st_sensors_deallocate_trigger(indio_dev);
559
560 st_magn_deallocate_ring(indio_dev);
561 }
562 EXPORT_SYMBOL(st_magn_common_remove);
563
564 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
565 MODULE_DESCRIPTION("STMicroelectronics magnetometers driver");
566 MODULE_LICENSE("GPL v2");