Commit | Line | Data |
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23491b51 DC |
1 | /* |
2 | * STMicroelectronics sensors core library driver | |
3 | * | |
4 | * Copyright 2012-2013 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/delay.h> | |
15 | #include <linux/iio/iio.h> | |
ea7e586b | 16 | #include <linux/regulator/consumer.h> |
3ce85cc4 | 17 | #include <linux/of.h> |
23491b51 | 18 | #include <asm/unaligned.h> |
23491b51 DC |
19 | #include <linux/iio/common/st_sensors.h> |
20 | ||
a9fd053b LW |
21 | #include "st_sensors_core.h" |
22 | ||
607a568a DC |
23 | static inline u32 st_sensors_get_unaligned_le24(const u8 *p) |
24 | { | |
23cde4d6 | 25 | return (s32)((p[0] | p[1] << 8 | p[2] << 16) << 8) >> 8; |
607a568a DC |
26 | } |
27 | ||
a9fd053b LW |
28 | int st_sensors_write_data_with_mask(struct iio_dev *indio_dev, |
29 | u8 reg_addr, u8 mask, u8 data) | |
23491b51 DC |
30 | { |
31 | int err; | |
32 | u8 new_data; | |
33 | struct st_sensor_data *sdata = iio_priv(indio_dev); | |
34 | ||
35 | err = sdata->tf->read_byte(&sdata->tb, sdata->dev, reg_addr, &new_data); | |
36 | if (err < 0) | |
37 | goto st_sensors_write_data_with_mask_error; | |
38 | ||
39 | new_data = ((new_data & (~mask)) | ((data << __ffs(mask)) & mask)); | |
40 | err = sdata->tf->write_byte(&sdata->tb, sdata->dev, reg_addr, new_data); | |
41 | ||
42 | st_sensors_write_data_with_mask_error: | |
43 | return err; | |
44 | } | |
45 | ||
a0175b9c LW |
46 | int st_sensors_debugfs_reg_access(struct iio_dev *indio_dev, |
47 | unsigned reg, unsigned writeval, | |
48 | unsigned *readval) | |
49 | { | |
50 | struct st_sensor_data *sdata = iio_priv(indio_dev); | |
51 | u8 readdata; | |
52 | int err; | |
53 | ||
54 | if (!readval) | |
55 | return sdata->tf->write_byte(&sdata->tb, sdata->dev, | |
56 | (u8)reg, (u8)writeval); | |
57 | ||
58 | err = sdata->tf->read_byte(&sdata->tb, sdata->dev, (u8)reg, &readdata); | |
59 | if (err < 0) | |
60 | return err; | |
61 | ||
62 | *readval = (unsigned)readdata; | |
63 | ||
64 | return 0; | |
65 | } | |
66 | EXPORT_SYMBOL(st_sensors_debugfs_reg_access); | |
67 | ||
a7ee8839 | 68 | static int st_sensors_match_odr(struct st_sensor_settings *sensor_settings, |
23491b51 DC |
69 | unsigned int odr, struct st_sensor_odr_avl *odr_out) |
70 | { | |
71 | int i, ret = -EINVAL; | |
72 | ||
73 | for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) { | |
a7ee8839 | 74 | if (sensor_settings->odr.odr_avl[i].hz == 0) |
23491b51 DC |
75 | goto st_sensors_match_odr_error; |
76 | ||
a7ee8839 DC |
77 | if (sensor_settings->odr.odr_avl[i].hz == odr) { |
78 | odr_out->hz = sensor_settings->odr.odr_avl[i].hz; | |
79 | odr_out->value = sensor_settings->odr.odr_avl[i].value; | |
23491b51 DC |
80 | ret = 0; |
81 | break; | |
82 | } | |
83 | } | |
84 | ||
85 | st_sensors_match_odr_error: | |
86 | return ret; | |
87 | } | |
88 | ||
89 | int st_sensors_set_odr(struct iio_dev *indio_dev, unsigned int odr) | |
90 | { | |
91 | int err; | |
852afe99 | 92 | struct st_sensor_odr_avl odr_out = {0, 0}; |
23491b51 DC |
93 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
94 | ||
a7ee8839 | 95 | err = st_sensors_match_odr(sdata->sensor_settings, odr, &odr_out); |
23491b51 DC |
96 | if (err < 0) |
97 | goto st_sensors_match_odr_error; | |
98 | ||
a7ee8839 DC |
99 | if ((sdata->sensor_settings->odr.addr == |
100 | sdata->sensor_settings->pw.addr) && | |
101 | (sdata->sensor_settings->odr.mask == | |
102 | sdata->sensor_settings->pw.mask)) { | |
23491b51 DC |
103 | if (sdata->enabled == true) { |
104 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
105 | sdata->sensor_settings->odr.addr, |
106 | sdata->sensor_settings->odr.mask, | |
23491b51 DC |
107 | odr_out.value); |
108 | } else { | |
109 | err = 0; | |
110 | } | |
111 | } else { | |
112 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
113 | sdata->sensor_settings->odr.addr, |
114 | sdata->sensor_settings->odr.mask, | |
23491b51 DC |
115 | odr_out.value); |
116 | } | |
117 | if (err >= 0) | |
118 | sdata->odr = odr_out.hz; | |
119 | ||
120 | st_sensors_match_odr_error: | |
121 | return err; | |
122 | } | |
123 | EXPORT_SYMBOL(st_sensors_set_odr); | |
124 | ||
a7ee8839 | 125 | static int st_sensors_match_fs(struct st_sensor_settings *sensor_settings, |
23491b51 DC |
126 | unsigned int fs, int *index_fs_avl) |
127 | { | |
128 | int i, ret = -EINVAL; | |
129 | ||
130 | for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { | |
a7ee8839 | 131 | if (sensor_settings->fs.fs_avl[i].num == 0) |
23491b51 DC |
132 | goto st_sensors_match_odr_error; |
133 | ||
a7ee8839 | 134 | if (sensor_settings->fs.fs_avl[i].num == fs) { |
23491b51 DC |
135 | *index_fs_avl = i; |
136 | ret = 0; | |
137 | break; | |
138 | } | |
139 | } | |
140 | ||
141 | st_sensors_match_odr_error: | |
142 | return ret; | |
143 | } | |
144 | ||
a7ee8839 | 145 | static int st_sensors_set_fullscale(struct iio_dev *indio_dev, unsigned int fs) |
23491b51 | 146 | { |
852afe99 | 147 | int err, i = 0; |
23491b51 DC |
148 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
149 | ||
bb602f8c GB |
150 | if (sdata->sensor_settings->fs.addr == 0) |
151 | return 0; | |
152 | ||
a7ee8839 | 153 | err = st_sensors_match_fs(sdata->sensor_settings, fs, &i); |
23491b51 DC |
154 | if (err < 0) |
155 | goto st_accel_set_fullscale_error; | |
156 | ||
157 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
158 | sdata->sensor_settings->fs.addr, |
159 | sdata->sensor_settings->fs.mask, | |
160 | sdata->sensor_settings->fs.fs_avl[i].value); | |
23491b51 DC |
161 | if (err < 0) |
162 | goto st_accel_set_fullscale_error; | |
163 | ||
164 | sdata->current_fullscale = (struct st_sensor_fullscale_avl *) | |
a7ee8839 | 165 | &sdata->sensor_settings->fs.fs_avl[i]; |
23491b51 DC |
166 | return err; |
167 | ||
168 | st_accel_set_fullscale_error: | |
169 | dev_err(&indio_dev->dev, "failed to set new fullscale.\n"); | |
170 | return err; | |
171 | } | |
172 | ||
173 | int st_sensors_set_enable(struct iio_dev *indio_dev, bool enable) | |
174 | { | |
23491b51 DC |
175 | u8 tmp_value; |
176 | int err = -EINVAL; | |
852afe99 DC |
177 | bool found = false; |
178 | struct st_sensor_odr_avl odr_out = {0, 0}; | |
23491b51 DC |
179 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
180 | ||
181 | if (enable) { | |
a7ee8839 DC |
182 | tmp_value = sdata->sensor_settings->pw.value_on; |
183 | if ((sdata->sensor_settings->odr.addr == | |
184 | sdata->sensor_settings->pw.addr) && | |
185 | (sdata->sensor_settings->odr.mask == | |
186 | sdata->sensor_settings->pw.mask)) { | |
187 | err = st_sensors_match_odr(sdata->sensor_settings, | |
23491b51 DC |
188 | sdata->odr, &odr_out); |
189 | if (err < 0) | |
190 | goto set_enable_error; | |
191 | tmp_value = odr_out.value; | |
192 | found = true; | |
193 | } | |
194 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
195 | sdata->sensor_settings->pw.addr, |
196 | sdata->sensor_settings->pw.mask, tmp_value); | |
23491b51 DC |
197 | if (err < 0) |
198 | goto set_enable_error; | |
199 | ||
200 | sdata->enabled = true; | |
201 | ||
202 | if (found) | |
203 | sdata->odr = odr_out.hz; | |
204 | } else { | |
205 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
206 | sdata->sensor_settings->pw.addr, |
207 | sdata->sensor_settings->pw.mask, | |
208 | sdata->sensor_settings->pw.value_off); | |
23491b51 DC |
209 | if (err < 0) |
210 | goto set_enable_error; | |
211 | ||
212 | sdata->enabled = false; | |
213 | } | |
214 | ||
215 | set_enable_error: | |
216 | return err; | |
217 | } | |
218 | EXPORT_SYMBOL(st_sensors_set_enable); | |
219 | ||
220 | int st_sensors_set_axis_enable(struct iio_dev *indio_dev, u8 axis_enable) | |
221 | { | |
222 | struct st_sensor_data *sdata = iio_priv(indio_dev); | |
223 | ||
224 | return st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
225 | sdata->sensor_settings->enable_axis.addr, |
226 | sdata->sensor_settings->enable_axis.mask, | |
227 | axis_enable); | |
23491b51 DC |
228 | } |
229 | EXPORT_SYMBOL(st_sensors_set_axis_enable); | |
230 | ||
ea7e586b LW |
231 | void st_sensors_power_enable(struct iio_dev *indio_dev) |
232 | { | |
233 | struct st_sensor_data *pdata = iio_priv(indio_dev); | |
234 | int err; | |
235 | ||
236 | /* Regulators not mandatory, but if requested we should enable them. */ | |
237 | pdata->vdd = devm_regulator_get_optional(indio_dev->dev.parent, "vdd"); | |
238 | if (!IS_ERR(pdata->vdd)) { | |
239 | err = regulator_enable(pdata->vdd); | |
240 | if (err != 0) | |
241 | dev_warn(&indio_dev->dev, | |
242 | "Failed to enable specified Vdd supply\n"); | |
243 | } | |
244 | ||
245 | pdata->vdd_io = devm_regulator_get_optional(indio_dev->dev.parent, "vddio"); | |
246 | if (!IS_ERR(pdata->vdd_io)) { | |
247 | err = regulator_enable(pdata->vdd_io); | |
248 | if (err != 0) | |
249 | dev_warn(&indio_dev->dev, | |
250 | "Failed to enable specified Vdd_IO supply\n"); | |
251 | } | |
252 | } | |
253 | EXPORT_SYMBOL(st_sensors_power_enable); | |
254 | ||
255 | void st_sensors_power_disable(struct iio_dev *indio_dev) | |
256 | { | |
257 | struct st_sensor_data *pdata = iio_priv(indio_dev); | |
258 | ||
259 | if (!IS_ERR(pdata->vdd)) | |
260 | regulator_disable(pdata->vdd); | |
261 | ||
262 | if (!IS_ERR(pdata->vdd_io)) | |
263 | regulator_disable(pdata->vdd_io); | |
264 | } | |
265 | EXPORT_SYMBOL(st_sensors_power_disable); | |
266 | ||
38d1c6a9 | 267 | static int st_sensors_set_drdy_int_pin(struct iio_dev *indio_dev, |
a7ee8839 | 268 | struct st_sensors_platform_data *pdata) |
23491b51 | 269 | { |
23491b51 DC |
270 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
271 | ||
d2bc4318 LW |
272 | /* Sensor does not support interrupts */ |
273 | if (sdata->sensor_settings->drdy_irq.addr == 0) { | |
274 | if (pdata->drdy_int_pin) | |
275 | dev_info(&indio_dev->dev, | |
276 | "DRDY on pin INT%d specified, but sensor " | |
277 | "does not support interrupts\n", | |
278 | pdata->drdy_int_pin); | |
279 | return 0; | |
280 | } | |
281 | ||
23cde4d6 DC |
282 | switch (pdata->drdy_int_pin) { |
283 | case 1: | |
a7ee8839 | 284 | if (sdata->sensor_settings->drdy_irq.mask_int1 == 0) { |
23cde4d6 DC |
285 | dev_err(&indio_dev->dev, |
286 | "DRDY on INT1 not available.\n"); | |
38d1c6a9 | 287 | return -EINVAL; |
23cde4d6 DC |
288 | } |
289 | sdata->drdy_int_pin = 1; | |
290 | break; | |
291 | case 2: | |
a7ee8839 | 292 | if (sdata->sensor_settings->drdy_irq.mask_int2 == 0) { |
23cde4d6 DC |
293 | dev_err(&indio_dev->dev, |
294 | "DRDY on INT2 not available.\n"); | |
38d1c6a9 | 295 | return -EINVAL; |
23cde4d6 DC |
296 | } |
297 | sdata->drdy_int_pin = 2; | |
298 | break; | |
299 | default: | |
300 | dev_err(&indio_dev->dev, "DRDY on pdata not valid.\n"); | |
38d1c6a9 | 301 | return -EINVAL; |
23cde4d6 DC |
302 | } |
303 | ||
0e6f6871 LW |
304 | if (pdata->open_drain) { |
305 | if (!sdata->sensor_settings->drdy_irq.addr_od) | |
306 | dev_err(&indio_dev->dev, | |
307 | "open drain requested but unsupported.\n"); | |
308 | else | |
309 | sdata->int_pin_open_drain = true; | |
310 | } | |
311 | ||
38d1c6a9 LJ |
312 | return 0; |
313 | } | |
314 | ||
3ce85cc4 LW |
315 | #ifdef CONFIG_OF |
316 | static struct st_sensors_platform_data *st_sensors_of_probe(struct device *dev, | |
317 | struct st_sensors_platform_data *defdata) | |
318 | { | |
319 | struct st_sensors_platform_data *pdata; | |
320 | struct device_node *np = dev->of_node; | |
321 | u32 val; | |
322 | ||
323 | if (!np) | |
324 | return NULL; | |
325 | ||
326 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
327 | if (!of_property_read_u32(np, "st,drdy-int-pin", &val) && (val <= 2)) | |
328 | pdata->drdy_int_pin = (u8) val; | |
329 | else | |
d2bc4318 | 330 | pdata->drdy_int_pin = defdata ? defdata->drdy_int_pin : 0; |
3ce85cc4 | 331 | |
0e6f6871 LW |
332 | pdata->open_drain = of_property_read_bool(np, "drive-open-drain"); |
333 | ||
3ce85cc4 LW |
334 | return pdata; |
335 | } | |
336 | #else | |
337 | static struct st_sensors_platform_data *st_sensors_of_probe(struct device *dev, | |
338 | struct st_sensors_platform_data *defdata) | |
339 | { | |
340 | return NULL; | |
341 | } | |
342 | #endif | |
343 | ||
38d1c6a9 LJ |
344 | int st_sensors_init_sensor(struct iio_dev *indio_dev, |
345 | struct st_sensors_platform_data *pdata) | |
346 | { | |
347 | struct st_sensor_data *sdata = iio_priv(indio_dev); | |
3ce85cc4 | 348 | struct st_sensors_platform_data *of_pdata; |
38d1c6a9 LJ |
349 | int err = 0; |
350 | ||
3ce85cc4 LW |
351 | /* If OF/DT pdata exists, it will take precedence of anything else */ |
352 | of_pdata = st_sensors_of_probe(indio_dev->dev.parent, pdata); | |
353 | if (of_pdata) | |
354 | pdata = of_pdata; | |
355 | ||
3c8bf223 | 356 | if (pdata) { |
38d1c6a9 | 357 | err = st_sensors_set_drdy_int_pin(indio_dev, pdata); |
3c8bf223 LJ |
358 | if (err < 0) |
359 | return err; | |
360 | } | |
38d1c6a9 | 361 | |
23491b51 DC |
362 | err = st_sensors_set_enable(indio_dev, false); |
363 | if (err < 0) | |
efd9566f | 364 | return err; |
23491b51 | 365 | |
99147606 CDL |
366 | /* Disable DRDY, this might be still be enabled after reboot. */ |
367 | err = st_sensors_set_dataready_irq(indio_dev, false); | |
368 | if (err < 0) | |
369 | return err; | |
370 | ||
362f2f86 LJ |
371 | if (sdata->current_fullscale) { |
372 | err = st_sensors_set_fullscale(indio_dev, | |
a7ee8839 | 373 | sdata->current_fullscale->num); |
362f2f86 | 374 | if (err < 0) |
efd9566f | 375 | return err; |
362f2f86 LJ |
376 | } else |
377 | dev_info(&indio_dev->dev, "Full-scale not possible\n"); | |
23491b51 DC |
378 | |
379 | err = st_sensors_set_odr(indio_dev, sdata->odr); | |
380 | if (err < 0) | |
efd9566f | 381 | return err; |
23491b51 DC |
382 | |
383 | /* set BDU */ | |
bb60646c LW |
384 | if (sdata->sensor_settings->bdu.addr) { |
385 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
386 | sdata->sensor_settings->bdu.addr, |
387 | sdata->sensor_settings->bdu.mask, true); | |
bb60646c LW |
388 | if (err < 0) |
389 | return err; | |
390 | } | |
23491b51 | 391 | |
0e6f6871 LW |
392 | if (sdata->int_pin_open_drain) { |
393 | dev_info(&indio_dev->dev, | |
394 | "set interrupt line to open drain mode\n"); | |
395 | err = st_sensors_write_data_with_mask(indio_dev, | |
396 | sdata->sensor_settings->drdy_irq.addr_od, | |
397 | sdata->sensor_settings->drdy_irq.mask_od, 1); | |
398 | if (err < 0) | |
399 | return err; | |
400 | } | |
401 | ||
23491b51 DC |
402 | err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); |
403 | ||
23491b51 DC |
404 | return err; |
405 | } | |
406 | EXPORT_SYMBOL(st_sensors_init_sensor); | |
407 | ||
408 | int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable) | |
409 | { | |
410 | int err; | |
23cde4d6 | 411 | u8 drdy_mask; |
23491b51 DC |
412 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
413 | ||
a7ee8839 | 414 | if (!sdata->sensor_settings->drdy_irq.addr) |
38d1c6a9 LJ |
415 | return 0; |
416 | ||
23491b51 | 417 | /* Enable/Disable the interrupt generator 1. */ |
a7ee8839 | 418 | if (sdata->sensor_settings->drdy_irq.ig1.en_addr > 0) { |
23491b51 | 419 | err = st_sensors_write_data_with_mask(indio_dev, |
a7ee8839 DC |
420 | sdata->sensor_settings->drdy_irq.ig1.en_addr, |
421 | sdata->sensor_settings->drdy_irq.ig1.en_mask, | |
422 | (int)enable); | |
23491b51 DC |
423 | if (err < 0) |
424 | goto st_accel_set_dataready_irq_error; | |
425 | } | |
426 | ||
23cde4d6 | 427 | if (sdata->drdy_int_pin == 1) |
a7ee8839 | 428 | drdy_mask = sdata->sensor_settings->drdy_irq.mask_int1; |
23cde4d6 | 429 | else |
a7ee8839 | 430 | drdy_mask = sdata->sensor_settings->drdy_irq.mask_int2; |
23cde4d6 | 431 | |
65925b65 LW |
432 | /* Flag to the poll function that the hardware trigger is in use */ |
433 | sdata->hw_irq_trigger = enable; | |
434 | ||
23491b51 DC |
435 | /* Enable/Disable the interrupt generator for data ready. */ |
436 | err = st_sensors_write_data_with_mask(indio_dev, | |
a7ee8839 DC |
437 | sdata->sensor_settings->drdy_irq.addr, |
438 | drdy_mask, (int)enable); | |
23491b51 DC |
439 | |
440 | st_accel_set_dataready_irq_error: | |
441 | return err; | |
442 | } | |
443 | EXPORT_SYMBOL(st_sensors_set_dataready_irq); | |
444 | ||
445 | int st_sensors_set_fullscale_by_gain(struct iio_dev *indio_dev, int scale) | |
446 | { | |
447 | int err = -EINVAL, i; | |
448 | struct st_sensor_data *sdata = iio_priv(indio_dev); | |
449 | ||
450 | for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { | |
a7ee8839 DC |
451 | if ((sdata->sensor_settings->fs.fs_avl[i].gain == scale) && |
452 | (sdata->sensor_settings->fs.fs_avl[i].gain != 0)) { | |
23491b51 DC |
453 | err = 0; |
454 | break; | |
455 | } | |
456 | } | |
457 | if (err < 0) | |
458 | goto st_sensors_match_scale_error; | |
459 | ||
460 | err = st_sensors_set_fullscale(indio_dev, | |
a7ee8839 | 461 | sdata->sensor_settings->fs.fs_avl[i].num); |
23491b51 DC |
462 | |
463 | st_sensors_match_scale_error: | |
464 | return err; | |
465 | } | |
466 | EXPORT_SYMBOL(st_sensors_set_fullscale_by_gain); | |
467 | ||
468 | static int st_sensors_read_axis_data(struct iio_dev *indio_dev, | |
607a568a | 469 | struct iio_chan_spec const *ch, int *data) |
23491b51 DC |
470 | { |
471 | int err; | |
607a568a | 472 | u8 *outdata; |
23491b51 | 473 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
607a568a DC |
474 | unsigned int byte_for_channel = ch->scan_type.storagebits >> 3; |
475 | ||
476 | outdata = kmalloc(byte_for_channel, GFP_KERNEL); | |
caf5ca12 LJ |
477 | if (!outdata) |
478 | return -ENOMEM; | |
23491b51 DC |
479 | |
480 | err = sdata->tf->read_multiple_byte(&sdata->tb, sdata->dev, | |
607a568a | 481 | ch->address, byte_for_channel, |
23491b51 DC |
482 | outdata, sdata->multiread_bit); |
483 | if (err < 0) | |
607a568a | 484 | goto st_sensors_free_memory; |
23491b51 | 485 | |
4861a007 LW |
486 | if (byte_for_channel == 1) |
487 | *data = (s8)*outdata; | |
488 | else if (byte_for_channel == 2) | |
607a568a DC |
489 | *data = (s16)get_unaligned_le16(outdata); |
490 | else if (byte_for_channel == 3) | |
491 | *data = (s32)st_sensors_get_unaligned_le24(outdata); | |
23491b51 | 492 | |
607a568a DC |
493 | st_sensors_free_memory: |
494 | kfree(outdata); | |
caf5ca12 | 495 | |
23491b51 DC |
496 | return err; |
497 | } | |
498 | ||
499 | int st_sensors_read_info_raw(struct iio_dev *indio_dev, | |
500 | struct iio_chan_spec const *ch, int *val) | |
501 | { | |
502 | int err; | |
503 | struct st_sensor_data *sdata = iio_priv(indio_dev); | |
504 | ||
505 | mutex_lock(&indio_dev->mlock); | |
506 | if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) { | |
507 | err = -EBUSY; | |
5bb8e72d | 508 | goto out; |
23491b51 DC |
509 | } else { |
510 | err = st_sensors_set_enable(indio_dev, true); | |
511 | if (err < 0) | |
5bb8e72d | 512 | goto out; |
23491b51 | 513 | |
a7ee8839 | 514 | msleep((sdata->sensor_settings->bootime * 1000) / sdata->odr); |
607a568a | 515 | err = st_sensors_read_axis_data(indio_dev, ch, val); |
23491b51 | 516 | if (err < 0) |
5bb8e72d | 517 | goto out; |
23491b51 DC |
518 | |
519 | *val = *val >> ch->scan_type.shift; | |
d61a04dc DC |
520 | |
521 | err = st_sensors_set_enable(indio_dev, false); | |
23491b51 | 522 | } |
5bb8e72d | 523 | out: |
23491b51 DC |
524 | mutex_unlock(&indio_dev->mlock); |
525 | ||
526 | return err; | |
23491b51 DC |
527 | } |
528 | EXPORT_SYMBOL(st_sensors_read_info_raw); | |
529 | ||
530 | int st_sensors_check_device_support(struct iio_dev *indio_dev, | |
a7ee8839 DC |
531 | int num_sensors_list, |
532 | const struct st_sensor_settings *sensor_settings) | |
23491b51 | 533 | { |
23491b51 | 534 | int i, n, err; |
bc27381e | 535 | u8 wai; |
23491b51 DC |
536 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
537 | ||
23491b51 | 538 | for (i = 0; i < num_sensors_list; i++) { |
bc27381e GB |
539 | for (n = 0; n < ST_SENSORS_MAX_4WAI; n++) { |
540 | if (strcmp(indio_dev->name, | |
541 | sensor_settings[i].sensors_supported[n]) == 0) { | |
542 | break; | |
543 | } | |
544 | } | |
545 | if (n < ST_SENSORS_MAX_4WAI) | |
23491b51 DC |
546 | break; |
547 | } | |
bc27381e GB |
548 | if (i == num_sensors_list) { |
549 | dev_err(&indio_dev->dev, "device name %s not recognized.\n", | |
550 | indio_dev->name); | |
551 | return -ENODEV; | |
552 | } | |
23491b51 | 553 | |
bc27381e GB |
554 | err = sdata->tf->read_byte(&sdata->tb, sdata->dev, |
555 | sensor_settings[i].wai_addr, &wai); | |
556 | if (err < 0) { | |
557 | dev_err(&indio_dev->dev, "failed to read Who-Am-I register.\n"); | |
558 | return err; | |
23491b51 | 559 | } |
bc27381e GB |
560 | |
561 | if (sensor_settings[i].wai != wai) { | |
562 | dev_err(&indio_dev->dev, "%s: WhoAmI mismatch (0x%x).\n", | |
563 | indio_dev->name, wai); | |
564 | return -EINVAL; | |
23491b51 DC |
565 | } |
566 | ||
a7ee8839 DC |
567 | sdata->sensor_settings = |
568 | (struct st_sensor_settings *)&sensor_settings[i]; | |
23491b51 DC |
569 | |
570 | return i; | |
23491b51 DC |
571 | } |
572 | EXPORT_SYMBOL(st_sensors_check_device_support); | |
573 | ||
23491b51 DC |
574 | ssize_t st_sensors_sysfs_sampling_frequency_avail(struct device *dev, |
575 | struct device_attribute *attr, char *buf) | |
576 | { | |
4d2e4fc2 | 577 | int i, len = 0; |
23491b51 | 578 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
4d2e4fc2 DC |
579 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
580 | ||
581 | mutex_lock(&indio_dev->mlock); | |
582 | for (i = 0; i < ST_SENSORS_ODR_LIST_MAX; i++) { | |
a7ee8839 | 583 | if (sdata->sensor_settings->odr.odr_avl[i].hz == 0) |
4d2e4fc2 DC |
584 | break; |
585 | ||
586 | len += scnprintf(buf + len, PAGE_SIZE - len, "%d ", | |
a7ee8839 | 587 | sdata->sensor_settings->odr.odr_avl[i].hz); |
4d2e4fc2 DC |
588 | } |
589 | mutex_unlock(&indio_dev->mlock); | |
590 | buf[len - 1] = '\n'; | |
23491b51 | 591 | |
4d2e4fc2 | 592 | return len; |
23491b51 DC |
593 | } |
594 | EXPORT_SYMBOL(st_sensors_sysfs_sampling_frequency_avail); | |
595 | ||
596 | ssize_t st_sensors_sysfs_scale_avail(struct device *dev, | |
597 | struct device_attribute *attr, char *buf) | |
598 | { | |
4d2e4fc2 | 599 | int i, len = 0; |
23491b51 | 600 | struct iio_dev *indio_dev = dev_get_drvdata(dev); |
4d2e4fc2 DC |
601 | struct st_sensor_data *sdata = iio_priv(indio_dev); |
602 | ||
603 | mutex_lock(&indio_dev->mlock); | |
604 | for (i = 0; i < ST_SENSORS_FULLSCALE_AVL_MAX; i++) { | |
a7ee8839 | 605 | if (sdata->sensor_settings->fs.fs_avl[i].num == 0) |
4d2e4fc2 DC |
606 | break; |
607 | ||
608 | len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06u ", | |
a7ee8839 | 609 | sdata->sensor_settings->fs.fs_avl[i].gain); |
4d2e4fc2 DC |
610 | } |
611 | mutex_unlock(&indio_dev->mlock); | |
612 | buf[len - 1] = '\n'; | |
23491b51 | 613 | |
4d2e4fc2 | 614 | return len; |
23491b51 DC |
615 | } |
616 | EXPORT_SYMBOL(st_sensors_sysfs_scale_avail); | |
617 | ||
618 | MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); | |
619 | MODULE_DESCRIPTION("STMicroelectronics ST-sensors core"); | |
620 | MODULE_LICENSE("GPL v2"); |