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20ffac27 DB |
1 | /* |
2 | * KMX61 - Kionix 6-axis Accelerometer/Magnetometer | |
3 | * | |
4 | * Copyright (c) 2014, Intel Corporation. | |
5 | * | |
6 | * This file is subject to the terms and conditions of version 2 of | |
7 | * the GNU General Public License. See the file COPYING in the main | |
8 | * directory of this archive for more details. | |
9 | * | |
10 | * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F). | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/i2c.h> | |
b25862c5 | 16 | #include <linux/acpi.h> |
aff8609a | 17 | #include <linux/interrupt.h> |
3b9c40e6 | 18 | #include <linux/pm.h> |
aff8609a | 19 | #include <linux/pm_runtime.h> |
20ffac27 DB |
20 | #include <linux/iio/iio.h> |
21 | #include <linux/iio/sysfs.h> | |
fd3ae7a9 | 22 | #include <linux/iio/events.h> |
c3a23ecc DB |
23 | #include <linux/iio/trigger.h> |
24 | #include <linux/iio/buffer.h> | |
25 | #include <linux/iio/triggered_buffer.h> | |
26 | #include <linux/iio/trigger_consumer.h> | |
20ffac27 DB |
27 | |
28 | #define KMX61_DRV_NAME "kmx61" | |
c3a23ecc | 29 | #define KMX61_IRQ_NAME "kmx61_event" |
20ffac27 DB |
30 | |
31 | #define KMX61_REG_WHO_AM_I 0x00 | |
fd3ae7a9 DB |
32 | #define KMX61_REG_INS1 0x01 |
33 | #define KMX61_REG_INS2 0x02 | |
20ffac27 DB |
34 | |
35 | /* | |
36 | * three 16-bit accelerometer output registers for X/Y/Z axis | |
37 | * we use only XOUT_L as a base register, all other addresses | |
38 | * can be obtained by applying an offset and are provided here | |
39 | * only for clarity. | |
40 | */ | |
41 | #define KMX61_ACC_XOUT_L 0x0A | |
42 | #define KMX61_ACC_XOUT_H 0x0B | |
43 | #define KMX61_ACC_YOUT_L 0x0C | |
44 | #define KMX61_ACC_YOUT_H 0x0D | |
45 | #define KMX61_ACC_ZOUT_L 0x0E | |
46 | #define KMX61_ACC_ZOUT_H 0x0F | |
47 | ||
48 | /* | |
49 | * one 16-bit temperature output register | |
50 | */ | |
51 | #define KMX61_TEMP_L 0x10 | |
52 | #define KMX61_TEMP_H 0x11 | |
53 | ||
54 | /* | |
55 | * three 16-bit magnetometer output registers for X/Y/Z axis | |
56 | */ | |
57 | #define KMX61_MAG_XOUT_L 0x12 | |
58 | #define KMX61_MAG_XOUT_H 0x13 | |
59 | #define KMX61_MAG_YOUT_L 0x14 | |
60 | #define KMX61_MAG_YOUT_H 0x15 | |
61 | #define KMX61_MAG_ZOUT_L 0x16 | |
62 | #define KMX61_MAG_ZOUT_H 0x17 | |
63 | ||
c3a23ecc | 64 | #define KMX61_REG_INL 0x28 |
20ffac27 DB |
65 | #define KMX61_REG_STBY 0x29 |
66 | #define KMX61_REG_CTRL1 0x2A | |
fd3ae7a9 | 67 | #define KMX61_REG_CTRL2 0x2B |
20ffac27 | 68 | #define KMX61_REG_ODCNTL 0x2C |
c3a23ecc | 69 | #define KMX61_REG_INC1 0x2D |
20ffac27 | 70 | |
fd3ae7a9 DB |
71 | #define KMX61_REG_WUF_THRESH 0x3D |
72 | #define KMX61_REG_WUF_TIMER 0x3E | |
73 | ||
20ffac27 DB |
74 | #define KMX61_ACC_STBY_BIT BIT(0) |
75 | #define KMX61_MAG_STBY_BIT BIT(1) | |
76 | #define KMX61_ACT_STBY_BIT BIT(7) | |
77 | ||
78 | #define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT) | |
79 | ||
fd3ae7a9 DB |
80 | #define KMX61_REG_INS1_BIT_WUFS BIT(1) |
81 | ||
82 | #define KMX61_REG_INS2_BIT_ZP BIT(0) | |
83 | #define KMX61_REG_INS2_BIT_ZN BIT(1) | |
84 | #define KMX61_REG_INS2_BIT_YP BIT(2) | |
85 | #define KMX61_REG_INS2_BIT_YN BIT(3) | |
86 | #define KMX61_REG_INS2_BIT_XP BIT(4) | |
87 | #define KMX61_REG_INS2_BIT_XN BIT(5) | |
88 | ||
20ffac27 DB |
89 | #define KMX61_REG_CTRL1_GSEL_MASK 0x03 |
90 | ||
c3a23ecc DB |
91 | #define KMX61_REG_CTRL1_BIT_RES BIT(4) |
92 | #define KMX61_REG_CTRL1_BIT_DRDYE BIT(5) | |
fd3ae7a9 DB |
93 | #define KMX61_REG_CTRL1_BIT_WUFE BIT(6) |
94 | #define KMX61_REG_CTRL1_BIT_BTSE BIT(7) | |
c3a23ecc | 95 | |
fd3ae7a9 | 96 | #define KMX61_REG_INC1_BIT_WUFS BIT(0) |
c3a23ecc DB |
97 | #define KMX61_REG_INC1_BIT_DRDYM BIT(1) |
98 | #define KMX61_REG_INC1_BIT_DRDYA BIT(2) | |
99 | #define KMX61_REG_INC1_BIT_IEN BIT(5) | |
100 | ||
20ffac27 DB |
101 | #define KMX61_ACC_ODR_SHIFT 0 |
102 | #define KMX61_MAG_ODR_SHIFT 4 | |
103 | #define KMX61_ACC_ODR_MASK 0x0F | |
104 | #define KMX61_MAG_ODR_MASK 0xF0 | |
105 | ||
fd3ae7a9 DB |
106 | #define KMX61_OWUF_MASK 0x7 |
107 | ||
108 | #define KMX61_DEFAULT_WAKE_THRESH 1 | |
109 | #define KMX61_DEFAULT_WAKE_DURATION 1 | |
110 | ||
aff8609a DB |
111 | #define KMX61_SLEEP_DELAY_MS 2000 |
112 | ||
20ffac27 DB |
113 | #define KMX61_CHIP_ID 0x12 |
114 | ||
115 | /* KMX61 devices */ | |
116 | #define KMX61_ACC 0x01 | |
117 | #define KMX61_MAG 0x02 | |
118 | ||
119 | struct kmx61_data { | |
120 | struct i2c_client *client; | |
121 | ||
122 | /* serialize access to non-atomic ops, e.g set_mode */ | |
123 | struct mutex lock; | |
124 | ||
125 | /* standby state */ | |
126 | bool acc_stby; | |
127 | bool mag_stby; | |
128 | ||
aff8609a DB |
129 | /* power state */ |
130 | bool acc_ps; | |
131 | bool mag_ps; | |
132 | ||
20ffac27 DB |
133 | /* config bits */ |
134 | u8 range; | |
135 | u8 odr_bits; | |
fd3ae7a9 DB |
136 | u8 wake_thresh; |
137 | u8 wake_duration; | |
20ffac27 DB |
138 | |
139 | /* accelerometer specific data */ | |
140 | struct iio_dev *acc_indio_dev; | |
c3a23ecc | 141 | struct iio_trigger *acc_dready_trig; |
fd3ae7a9 | 142 | struct iio_trigger *motion_trig; |
c3a23ecc | 143 | bool acc_dready_trig_on; |
fd3ae7a9 DB |
144 | bool motion_trig_on; |
145 | bool ev_enable_state; | |
20ffac27 DB |
146 | |
147 | /* magnetometer specific data */ | |
148 | struct iio_dev *mag_indio_dev; | |
c3a23ecc DB |
149 | struct iio_trigger *mag_dready_trig; |
150 | bool mag_dready_trig_on; | |
20ffac27 DB |
151 | }; |
152 | ||
153 | enum kmx61_range { | |
154 | KMX61_RANGE_2G, | |
155 | KMX61_RANGE_4G, | |
156 | KMX61_RANGE_8G, | |
157 | }; | |
158 | ||
159 | enum kmx61_axis { | |
160 | KMX61_AXIS_X, | |
161 | KMX61_AXIS_Y, | |
162 | KMX61_AXIS_Z, | |
163 | }; | |
164 | ||
165 | static const u16 kmx61_uscale_table[] = {9582, 19163, 38326}; | |
166 | ||
167 | static const struct { | |
168 | int val; | |
169 | int val2; | |
a36385a2 DB |
170 | } kmx61_samp_freq_table[] = { {12, 500000}, |
171 | {25, 0}, | |
172 | {50, 0}, | |
173 | {100, 0}, | |
174 | {200, 0}, | |
175 | {400, 0}, | |
176 | {800, 0}, | |
177 | {1600, 0}, | |
178 | {0, 781000}, | |
179 | {1, 563000}, | |
180 | {3, 125000}, | |
181 | {6, 250000} }; | |
20ffac27 | 182 | |
fd3ae7a9 DB |
183 | static const struct { |
184 | int val; | |
185 | int val2; | |
186 | int odr_bits; | |
187 | } kmx61_wake_up_odr_table[] = { {0, 781000, 0x00}, | |
188 | {1, 563000, 0x01}, | |
189 | {3, 125000, 0x02}, | |
190 | {6, 250000, 0x03}, | |
191 | {12, 500000, 0x04}, | |
192 | {25, 0, 0x05}, | |
193 | {50, 0, 0x06}, | |
194 | {100, 0, 0x06}, | |
195 | {200, 0, 0x06}, | |
196 | {400, 0, 0x06}, | |
197 | {800, 0, 0x06}, | |
198 | {1600, 0, 0x06} }; | |
199 | ||
20ffac27 DB |
200 | static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326"); |
201 | static IIO_CONST_ATTR(magn_scale_available, "0.001465"); | |
202 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( | |
203 | "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800"); | |
204 | ||
205 | static struct attribute *kmx61_acc_attributes[] = { | |
206 | &iio_const_attr_accel_scale_available.dev_attr.attr, | |
207 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
208 | NULL, | |
209 | }; | |
210 | ||
211 | static struct attribute *kmx61_mag_attributes[] = { | |
212 | &iio_const_attr_magn_scale_available.dev_attr.attr, | |
213 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, | |
214 | NULL, | |
215 | }; | |
216 | ||
217 | static const struct attribute_group kmx61_acc_attribute_group = { | |
218 | .attrs = kmx61_acc_attributes, | |
219 | }; | |
220 | ||
221 | static const struct attribute_group kmx61_mag_attribute_group = { | |
222 | .attrs = kmx61_mag_attributes, | |
223 | }; | |
224 | ||
fd3ae7a9 DB |
225 | static const struct iio_event_spec kmx61_event = { |
226 | .type = IIO_EV_TYPE_THRESH, | |
227 | .dir = IIO_EV_DIR_EITHER, | |
228 | .mask_separate = BIT(IIO_EV_INFO_VALUE) | | |
229 | BIT(IIO_EV_INFO_ENABLE) | | |
230 | BIT(IIO_EV_INFO_PERIOD), | |
231 | }; | |
232 | ||
20ffac27 DB |
233 | #define KMX61_ACC_CHAN(_axis) { \ |
234 | .type = IIO_ACCEL, \ | |
235 | .modified = 1, \ | |
236 | .channel2 = IIO_MOD_ ## _axis, \ | |
237 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
238 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ | |
239 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
240 | .address = KMX61_ACC, \ | |
241 | .scan_index = KMX61_AXIS_ ## _axis, \ | |
242 | .scan_type = { \ | |
243 | .sign = 's', \ | |
244 | .realbits = 12, \ | |
245 | .storagebits = 16, \ | |
246 | .shift = 4, \ | |
247 | .endianness = IIO_LE, \ | |
248 | }, \ | |
fd3ae7a9 DB |
249 | .event_spec = &kmx61_event, \ |
250 | .num_event_specs = 1 \ | |
20ffac27 DB |
251 | } |
252 | ||
253 | #define KMX61_MAG_CHAN(_axis) { \ | |
254 | .type = IIO_MAGN, \ | |
255 | .modified = 1, \ | |
256 | .channel2 = IIO_MOD_ ## _axis, \ | |
257 | .address = KMX61_MAG, \ | |
258 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ | |
259 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ | |
260 | BIT(IIO_CHAN_INFO_SAMP_FREQ), \ | |
261 | .scan_index = KMX61_AXIS_ ## _axis, \ | |
262 | .scan_type = { \ | |
263 | .sign = 's', \ | |
264 | .realbits = 14, \ | |
265 | .storagebits = 16, \ | |
266 | .shift = 2, \ | |
267 | .endianness = IIO_LE, \ | |
268 | }, \ | |
269 | } | |
270 | ||
271 | static const struct iio_chan_spec kmx61_acc_channels[] = { | |
272 | KMX61_ACC_CHAN(X), | |
273 | KMX61_ACC_CHAN(Y), | |
274 | KMX61_ACC_CHAN(Z), | |
275 | }; | |
276 | ||
277 | static const struct iio_chan_spec kmx61_mag_channels[] = { | |
278 | KMX61_MAG_CHAN(X), | |
279 | KMX61_MAG_CHAN(Y), | |
280 | KMX61_MAG_CHAN(Z), | |
281 | }; | |
282 | ||
283 | static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data) | |
284 | { | |
285 | struct kmx61_data **priv = iio_priv(indio_dev); | |
286 | ||
287 | *priv = data; | |
288 | } | |
289 | ||
290 | static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev) | |
291 | { | |
292 | return *(struct kmx61_data **)iio_priv(indio_dev); | |
293 | } | |
294 | ||
295 | static int kmx61_convert_freq_to_bit(int val, int val2) | |
296 | { | |
297 | int i; | |
298 | ||
299 | for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) | |
300 | if (val == kmx61_samp_freq_table[i].val && | |
301 | val2 == kmx61_samp_freq_table[i].val2) | |
a36385a2 | 302 | return i; |
fd3ae7a9 DB |
303 | return -EINVAL; |
304 | } | |
305 | ||
fd3ae7a9 DB |
306 | static int kmx61_convert_wake_up_odr_to_bit(int val, int val2) |
307 | { | |
308 | int i; | |
309 | ||
310 | for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i) | |
311 | if (kmx61_wake_up_odr_table[i].val == val && | |
312 | kmx61_wake_up_odr_table[i].val2 == val2) | |
313 | return kmx61_wake_up_odr_table[i].odr_bits; | |
314 | return -EINVAL; | |
315 | } | |
316 | ||
20ffac27 DB |
317 | /** |
318 | * kmx61_set_mode() - set KMX61 device operating mode | |
319 | * @data - kmx61 device private data pointer | |
320 | * @mode - bitmask, indicating operating mode for @device | |
321 | * @device - bitmask, indicating device for which @mode needs to be set | |
322 | * @update - update stby bits stored in device's private @data | |
323 | * | |
324 | * For each sensor (accelerometer/magnetometer) there are two operating modes | |
325 | * STANDBY and OPERATION. Neither accel nor magn can be disabled independently | |
326 | * if they are both enabled. Internal sensors state is saved in acc_stby and | |
327 | * mag_stby members of driver's private @data. | |
328 | */ | |
329 | static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device, | |
330 | bool update) | |
331 | { | |
332 | int ret; | |
333 | int acc_stby = -1, mag_stby = -1; | |
334 | ||
335 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); | |
336 | if (ret < 0) { | |
337 | dev_err(&data->client->dev, "Error reading reg_stby\n"); | |
338 | return ret; | |
339 | } | |
340 | if (device & KMX61_ACC) { | |
341 | if (mode & KMX61_ACC_STBY_BIT) { | |
342 | ret |= KMX61_ACC_STBY_BIT; | |
343 | acc_stby = 1; | |
344 | } else { | |
345 | ret &= ~KMX61_ACC_STBY_BIT; | |
346 | acc_stby = 0; | |
347 | } | |
348 | } | |
349 | ||
350 | if (device & KMX61_MAG) { | |
351 | if (mode & KMX61_MAG_STBY_BIT) { | |
352 | ret |= KMX61_MAG_STBY_BIT; | |
353 | mag_stby = 1; | |
354 | } else { | |
355 | ret &= ~KMX61_MAG_STBY_BIT; | |
356 | mag_stby = 0; | |
357 | } | |
358 | } | |
359 | ||
360 | if (mode & KMX61_ACT_STBY_BIT) | |
361 | ret |= KMX61_ACT_STBY_BIT; | |
362 | ||
363 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret); | |
364 | if (ret < 0) { | |
365 | dev_err(&data->client->dev, "Error writing reg_stby\n"); | |
366 | return ret; | |
367 | } | |
368 | ||
369 | if (acc_stby != -1 && update) | |
370 | data->acc_stby = acc_stby; | |
371 | if (mag_stby != -1 && update) | |
372 | data->mag_stby = mag_stby; | |
373 | ||
374 | return 0; | |
375 | } | |
376 | ||
377 | static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device) | |
378 | { | |
379 | int ret; | |
380 | ||
381 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); | |
382 | if (ret < 0) { | |
383 | dev_err(&data->client->dev, "Error reading reg_stby\n"); | |
384 | return ret; | |
385 | } | |
386 | *mode = 0; | |
387 | ||
388 | if (device & KMX61_ACC) { | |
389 | if (ret & KMX61_ACC_STBY_BIT) | |
390 | *mode |= KMX61_ACC_STBY_BIT; | |
391 | else | |
392 | *mode &= ~KMX61_ACC_STBY_BIT; | |
393 | } | |
394 | ||
395 | if (device & KMX61_MAG) { | |
396 | if (ret & KMX61_MAG_STBY_BIT) | |
397 | *mode |= KMX61_MAG_STBY_BIT; | |
398 | else | |
399 | *mode &= ~KMX61_MAG_STBY_BIT; | |
400 | } | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
ebd16366 | 405 | static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2) |
fd3ae7a9 DB |
406 | { |
407 | int ret, odr_bits; | |
408 | ||
409 | odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2); | |
410 | if (odr_bits < 0) | |
411 | return odr_bits; | |
412 | ||
413 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2, | |
414 | odr_bits); | |
415 | if (ret < 0) | |
416 | dev_err(&data->client->dev, "Error writing reg_ctrl2\n"); | |
417 | return ret; | |
418 | } | |
419 | ||
20ffac27 DB |
420 | static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device) |
421 | { | |
422 | int ret; | |
423 | u8 mode; | |
424 | int lodr_bits, odr_bits; | |
425 | ||
426 | ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); | |
427 | if (ret < 0) | |
428 | return ret; | |
429 | ||
430 | lodr_bits = kmx61_convert_freq_to_bit(val, val2); | |
431 | if (lodr_bits < 0) | |
432 | return lodr_bits; | |
433 | ||
434 | /* To change ODR, accel and magn must be in STDBY */ | |
435 | ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, | |
436 | true); | |
437 | if (ret < 0) | |
438 | return ret; | |
439 | ||
440 | odr_bits = 0; | |
441 | if (device & KMX61_ACC) | |
442 | odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT; | |
443 | if (device & KMX61_MAG) | |
444 | odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT; | |
445 | ||
446 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL, | |
447 | odr_bits); | |
448 | if (ret < 0) | |
449 | return ret; | |
450 | ||
4e843977 DB |
451 | data->odr_bits = odr_bits; |
452 | ||
fd3ae7a9 DB |
453 | if (device & KMX61_ACC) { |
454 | ret = kmx61_set_wake_up_odr(data, val, val2); | |
455 | if (ret) | |
456 | return ret; | |
457 | } | |
458 | ||
20ffac27 DB |
459 | return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
460 | } | |
461 | ||
462 | static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2, | |
463 | u8 device) | |
a36385a2 | 464 | { |
20ffac27 DB |
465 | u8 lodr_bits; |
466 | ||
467 | if (device & KMX61_ACC) | |
468 | lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) & | |
469 | KMX61_ACC_ODR_MASK; | |
470 | else if (device & KMX61_MAG) | |
471 | lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) & | |
472 | KMX61_MAG_ODR_MASK; | |
473 | else | |
474 | return -EINVAL; | |
475 | ||
a36385a2 DB |
476 | if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table)) |
477 | return -EINVAL; | |
478 | ||
479 | *val = kmx61_samp_freq_table[lodr_bits].val; | |
480 | *val2 = kmx61_samp_freq_table[lodr_bits].val2; | |
481 | ||
482 | return 0; | |
20ffac27 DB |
483 | } |
484 | ||
485 | static int kmx61_set_range(struct kmx61_data *data, u8 range) | |
486 | { | |
487 | int ret; | |
488 | ||
489 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); | |
490 | if (ret < 0) { | |
491 | dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); | |
492 | return ret; | |
493 | } | |
494 | ||
495 | ret &= ~KMX61_REG_CTRL1_GSEL_MASK; | |
496 | ret |= range & KMX61_REG_CTRL1_GSEL_MASK; | |
497 | ||
498 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); | |
499 | if (ret < 0) { | |
500 | dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); | |
501 | return ret; | |
502 | } | |
503 | ||
504 | data->range = range; | |
505 | ||
506 | return 0; | |
507 | } | |
508 | ||
509 | static int kmx61_set_scale(struct kmx61_data *data, u16 uscale) | |
510 | { | |
511 | int ret, i; | |
512 | u8 mode; | |
513 | ||
514 | for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) { | |
515 | if (kmx61_uscale_table[i] == uscale) { | |
516 | ret = kmx61_get_mode(data, &mode, | |
517 | KMX61_ACC | KMX61_MAG); | |
518 | if (ret < 0) | |
519 | return ret; | |
520 | ||
521 | ret = kmx61_set_mode(data, KMX61_ALL_STBY, | |
522 | KMX61_ACC | KMX61_MAG, true); | |
523 | if (ret < 0) | |
524 | return ret; | |
525 | ||
526 | ret = kmx61_set_range(data, i); | |
527 | if (ret < 0) | |
528 | return ret; | |
529 | ||
530 | return kmx61_set_mode(data, mode, | |
531 | KMX61_ACC | KMX61_MAG, true); | |
532 | } | |
533 | } | |
534 | return -EINVAL; | |
535 | } | |
536 | ||
537 | static int kmx61_chip_init(struct kmx61_data *data) | |
538 | { | |
fd3ae7a9 | 539 | int ret, val, val2; |
20ffac27 DB |
540 | |
541 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I); | |
542 | if (ret < 0) { | |
543 | dev_err(&data->client->dev, "Error reading who_am_i\n"); | |
544 | return ret; | |
545 | } | |
546 | ||
547 | if (ret != KMX61_CHIP_ID) { | |
548 | dev_err(&data->client->dev, | |
549 | "Wrong chip id, got %x expected %x\n", | |
550 | ret, KMX61_CHIP_ID); | |
551 | return -EINVAL; | |
552 | } | |
553 | ||
554 | /* set accel 12bit, 4g range */ | |
555 | ret = kmx61_set_range(data, KMX61_RANGE_4G); | |
556 | if (ret < 0) | |
557 | return ret; | |
558 | ||
559 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL); | |
560 | if (ret < 0) { | |
561 | dev_err(&data->client->dev, "Error reading reg_odcntl\n"); | |
562 | return ret; | |
563 | } | |
564 | data->odr_bits = ret; | |
565 | ||
a36385a2 DB |
566 | /* |
567 | * set output data rate for wake up (motion detection) function | |
568 | * to match data rate for accelerometer sampling | |
569 | */ | |
570 | ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC); | |
fd3ae7a9 DB |
571 | if (ret < 0) |
572 | return ret; | |
573 | ||
574 | ret = kmx61_set_wake_up_odr(data, val, val2); | |
575 | if (ret < 0) | |
576 | return ret; | |
577 | ||
20ffac27 DB |
578 | /* set acc/magn to OPERATION mode */ |
579 | ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true); | |
580 | if (ret < 0) | |
581 | return ret; | |
582 | ||
fd3ae7a9 DB |
583 | data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH; |
584 | data->wake_duration = KMX61_DEFAULT_WAKE_DURATION; | |
585 | ||
20ffac27 DB |
586 | return 0; |
587 | } | |
588 | ||
c3a23ecc DB |
589 | static int kmx61_setup_new_data_interrupt(struct kmx61_data *data, |
590 | bool status, u8 device) | |
591 | { | |
592 | u8 mode; | |
593 | int ret; | |
594 | ||
595 | ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); | |
596 | if (ret < 0) | |
597 | return ret; | |
598 | ||
599 | ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); | |
600 | if (ret < 0) | |
601 | return ret; | |
602 | ||
603 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); | |
604 | if (ret < 0) { | |
605 | dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); | |
606 | return ret; | |
607 | } | |
608 | ||
609 | if (status) { | |
610 | ret |= KMX61_REG_INC1_BIT_IEN; | |
611 | if (device & KMX61_ACC) | |
612 | ret |= KMX61_REG_INC1_BIT_DRDYA; | |
613 | if (device & KMX61_MAG) | |
614 | ret |= KMX61_REG_INC1_BIT_DRDYM; | |
615 | } else { | |
616 | ret &= ~KMX61_REG_INC1_BIT_IEN; | |
617 | if (device & KMX61_ACC) | |
618 | ret &= ~KMX61_REG_INC1_BIT_DRDYA; | |
619 | if (device & KMX61_MAG) | |
620 | ret &= ~KMX61_REG_INC1_BIT_DRDYM; | |
621 | } | |
622 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); | |
623 | if (ret < 0) { | |
624 | dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n"); | |
625 | return ret; | |
626 | } | |
627 | ||
628 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); | |
629 | if (ret < 0) { | |
630 | dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); | |
631 | return ret; | |
632 | } | |
633 | ||
634 | if (status) | |
635 | ret |= KMX61_REG_CTRL1_BIT_DRDYE; | |
636 | else | |
637 | ret &= ~KMX61_REG_CTRL1_BIT_DRDYE; | |
638 | ||
639 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); | |
640 | if (ret < 0) { | |
641 | dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); | |
642 | return ret; | |
643 | } | |
644 | ||
28ff344e | 645 | return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
c3a23ecc DB |
646 | } |
647 | ||
fd3ae7a9 DB |
648 | static int kmx61_chip_update_thresholds(struct kmx61_data *data) |
649 | { | |
650 | int ret; | |
651 | ||
652 | ret = i2c_smbus_write_byte_data(data->client, | |
653 | KMX61_REG_WUF_TIMER, | |
654 | data->wake_duration); | |
655 | if (ret < 0) { | |
656 | dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n"); | |
657 | return ret; | |
658 | } | |
659 | ||
660 | ret = i2c_smbus_write_byte_data(data->client, | |
661 | KMX61_REG_WUF_THRESH, | |
662 | data->wake_thresh); | |
28ff344e | 663 | if (ret < 0) |
fd3ae7a9 | 664 | dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n"); |
fd3ae7a9 | 665 | |
28ff344e | 666 | return ret; |
fd3ae7a9 DB |
667 | } |
668 | ||
669 | static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data, | |
0475c685 | 670 | bool status) |
fd3ae7a9 DB |
671 | { |
672 | u8 mode; | |
673 | int ret; | |
674 | ||
675 | ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); | |
676 | if (ret < 0) | |
677 | return ret; | |
678 | ||
679 | ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); | |
680 | if (ret < 0) | |
681 | return ret; | |
682 | ||
683 | ret = kmx61_chip_update_thresholds(data); | |
684 | if (ret < 0) | |
685 | return ret; | |
686 | ||
687 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); | |
688 | if (ret < 0) { | |
689 | dev_err(&data->client->dev, "Error reading reg_inc1\n"); | |
690 | return ret; | |
691 | } | |
692 | if (status) | |
693 | ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); | |
694 | else | |
695 | ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); | |
696 | ||
697 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); | |
698 | if (ret < 0) { | |
699 | dev_err(&data->client->dev, "Error writing reg_inc1\n"); | |
700 | return ret; | |
701 | } | |
702 | ||
703 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); | |
704 | if (ret < 0) { | |
705 | dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); | |
706 | return ret; | |
707 | } | |
708 | ||
709 | if (status) | |
710 | ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE; | |
711 | else | |
712 | ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE); | |
713 | ||
714 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); | |
715 | if (ret < 0) { | |
716 | dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); | |
717 | return ret; | |
718 | } | |
719 | mode |= KMX61_ACT_STBY_BIT; | |
28ff344e | 720 | return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
fd3ae7a9 DB |
721 | } |
722 | ||
aff8609a DB |
723 | /** |
724 | * kmx61_set_power_state() - set power state for kmx61 @device | |
725 | * @data - kmx61 device private pointer | |
726 | * @on - power state to be set for @device | |
727 | * @device - bitmask indicating device for which @on state needs to be set | |
728 | * | |
729 | * Notice that when ACC power state needs to be set to ON and MAG is in | |
730 | * OPERATION then we know that kmx61_runtime_resume was already called | |
731 | * so we must set ACC OPERATION mode here. The same happens when MAG power | |
732 | * state needs to be set to ON and ACC is in OPERATION. | |
733 | */ | |
734 | static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device) | |
735 | { | |
df1fad80 | 736 | #ifdef CONFIG_PM |
aff8609a DB |
737 | int ret; |
738 | ||
739 | if (device & KMX61_ACC) { | |
740 | if (on && !data->acc_ps && !data->mag_stby) { | |
741 | ret = kmx61_set_mode(data, 0, KMX61_ACC, true); | |
742 | if (ret < 0) | |
743 | return ret; | |
744 | } | |
745 | data->acc_ps = on; | |
746 | } | |
747 | if (device & KMX61_MAG) { | |
748 | if (on && !data->mag_ps && !data->acc_stby) { | |
749 | ret = kmx61_set_mode(data, 0, KMX61_MAG, true); | |
750 | if (ret < 0) | |
751 | return ret; | |
752 | } | |
753 | data->mag_ps = on; | |
754 | } | |
755 | ||
756 | if (on) { | |
757 | ret = pm_runtime_get_sync(&data->client->dev); | |
758 | } else { | |
759 | pm_runtime_mark_last_busy(&data->client->dev); | |
760 | ret = pm_runtime_put_autosuspend(&data->client->dev); | |
761 | } | |
762 | if (ret < 0) { | |
763 | dev_err(&data->client->dev, | |
764 | "Failed: kmx61_set_power_state for %d, ret %d\n", | |
765 | on, ret); | |
766 | if (on) | |
767 | pm_runtime_put_noidle(&data->client->dev); | |
768 | ||
769 | return ret; | |
770 | } | |
771 | #endif | |
772 | return 0; | |
773 | } | |
774 | ||
20ffac27 DB |
775 | static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset) |
776 | { | |
777 | int ret; | |
778 | u8 reg = base + offset * 2; | |
779 | ||
780 | ret = i2c_smbus_read_word_data(data->client, reg); | |
781 | if (ret < 0) | |
782 | dev_err(&data->client->dev, "failed to read reg at %x\n", reg); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
787 | static int kmx61_read_raw(struct iio_dev *indio_dev, | |
788 | struct iio_chan_spec const *chan, int *val, | |
789 | int *val2, long mask) | |
790 | { | |
791 | int ret; | |
792 | u8 base_reg; | |
793 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
794 | ||
795 | switch (mask) { | |
796 | case IIO_CHAN_INFO_RAW: | |
797 | switch (chan->type) { | |
798 | case IIO_ACCEL: | |
799 | base_reg = KMX61_ACC_XOUT_L; | |
800 | break; | |
801 | case IIO_MAGN: | |
802 | base_reg = KMX61_MAG_XOUT_L; | |
803 | break; | |
804 | default: | |
805 | return -EINVAL; | |
806 | } | |
807 | mutex_lock(&data->lock); | |
808 | ||
a3da4fa3 DB |
809 | ret = kmx61_set_power_state(data, true, chan->address); |
810 | if (ret) { | |
811 | mutex_unlock(&data->lock); | |
812 | return ret; | |
813 | } | |
814 | ||
20ffac27 DB |
815 | ret = kmx61_read_measurement(data, base_reg, chan->scan_index); |
816 | if (ret < 0) { | |
aff8609a | 817 | kmx61_set_power_state(data, false, chan->address); |
20ffac27 DB |
818 | mutex_unlock(&data->lock); |
819 | return ret; | |
820 | } | |
821 | *val = sign_extend32(ret >> chan->scan_type.shift, | |
822 | chan->scan_type.realbits - 1); | |
a3da4fa3 | 823 | ret = kmx61_set_power_state(data, false, chan->address); |
20ffac27 DB |
824 | |
825 | mutex_unlock(&data->lock); | |
a3da4fa3 DB |
826 | if (ret) |
827 | return ret; | |
20ffac27 DB |
828 | return IIO_VAL_INT; |
829 | case IIO_CHAN_INFO_SCALE: | |
830 | switch (chan->type) { | |
831 | case IIO_ACCEL: | |
832 | *val = 0; | |
833 | *val2 = kmx61_uscale_table[data->range]; | |
834 | return IIO_VAL_INT_PLUS_MICRO; | |
835 | case IIO_MAGN: | |
836 | /* 14 bits res, 1465 microGauss per magn count */ | |
837 | *val = 0; | |
838 | *val2 = 1465; | |
839 | return IIO_VAL_INT_PLUS_MICRO; | |
840 | default: | |
841 | return -EINVAL; | |
842 | } | |
843 | case IIO_CHAN_INFO_SAMP_FREQ: | |
844 | if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) | |
845 | return -EINVAL; | |
846 | ||
847 | mutex_lock(&data->lock); | |
848 | ret = kmx61_get_odr(data, val, val2, chan->address); | |
849 | mutex_unlock(&data->lock); | |
850 | if (ret) | |
851 | return -EINVAL; | |
852 | return IIO_VAL_INT_PLUS_MICRO; | |
853 | } | |
854 | return -EINVAL; | |
855 | } | |
856 | ||
857 | static int kmx61_write_raw(struct iio_dev *indio_dev, | |
858 | struct iio_chan_spec const *chan, int val, | |
859 | int val2, long mask) | |
860 | { | |
861 | int ret; | |
862 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
863 | ||
864 | switch (mask) { | |
865 | case IIO_CHAN_INFO_SAMP_FREQ: | |
866 | if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) | |
867 | return -EINVAL; | |
868 | ||
869 | mutex_lock(&data->lock); | |
870 | ret = kmx61_set_odr(data, val, val2, chan->address); | |
871 | mutex_unlock(&data->lock); | |
872 | return ret; | |
873 | case IIO_CHAN_INFO_SCALE: | |
874 | switch (chan->type) { | |
875 | case IIO_ACCEL: | |
876 | if (val != 0) | |
877 | return -EINVAL; | |
878 | mutex_lock(&data->lock); | |
879 | ret = kmx61_set_scale(data, val2); | |
880 | mutex_unlock(&data->lock); | |
881 | return ret; | |
882 | default: | |
883 | return -EINVAL; | |
884 | } | |
885 | default: | |
886 | return -EINVAL; | |
887 | } | |
888 | } | |
889 | ||
fd3ae7a9 DB |
890 | static int kmx61_read_event(struct iio_dev *indio_dev, |
891 | const struct iio_chan_spec *chan, | |
892 | enum iio_event_type type, | |
893 | enum iio_event_direction dir, | |
894 | enum iio_event_info info, | |
895 | int *val, int *val2) | |
896 | { | |
897 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
898 | ||
899 | *val2 = 0; | |
900 | switch (info) { | |
901 | case IIO_EV_INFO_VALUE: | |
902 | *val = data->wake_thresh; | |
28ff344e | 903 | return IIO_VAL_INT; |
fd3ae7a9 DB |
904 | case IIO_EV_INFO_PERIOD: |
905 | *val = data->wake_duration; | |
28ff344e | 906 | return IIO_VAL_INT; |
fd3ae7a9 DB |
907 | default: |
908 | return -EINVAL; | |
909 | } | |
fd3ae7a9 DB |
910 | } |
911 | ||
912 | static int kmx61_write_event(struct iio_dev *indio_dev, | |
dfb12ede DB |
913 | const struct iio_chan_spec *chan, |
914 | enum iio_event_type type, | |
915 | enum iio_event_direction dir, | |
916 | enum iio_event_info info, | |
917 | int val, int val2) | |
fd3ae7a9 DB |
918 | { |
919 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
920 | ||
921 | if (data->ev_enable_state) | |
922 | return -EBUSY; | |
923 | ||
924 | switch (info) { | |
925 | case IIO_EV_INFO_VALUE: | |
926 | data->wake_thresh = val; | |
28ff344e | 927 | return IIO_VAL_INT; |
fd3ae7a9 DB |
928 | case IIO_EV_INFO_PERIOD: |
929 | data->wake_duration = val; | |
28ff344e | 930 | return IIO_VAL_INT; |
fd3ae7a9 DB |
931 | default: |
932 | return -EINVAL; | |
933 | } | |
fd3ae7a9 DB |
934 | } |
935 | ||
936 | static int kmx61_read_event_config(struct iio_dev *indio_dev, | |
937 | const struct iio_chan_spec *chan, | |
938 | enum iio_event_type type, | |
939 | enum iio_event_direction dir) | |
940 | { | |
941 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
942 | ||
943 | return data->ev_enable_state; | |
944 | } | |
945 | ||
946 | static int kmx61_write_event_config(struct iio_dev *indio_dev, | |
dfb12ede DB |
947 | const struct iio_chan_spec *chan, |
948 | enum iio_event_type type, | |
949 | enum iio_event_direction dir, | |
950 | int state) | |
fd3ae7a9 DB |
951 | { |
952 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
28ff344e | 953 | int ret = 0; |
fd3ae7a9 DB |
954 | |
955 | if (state && data->ev_enable_state) | |
956 | return 0; | |
957 | ||
958 | mutex_lock(&data->lock); | |
959 | ||
960 | if (!state && data->motion_trig_on) { | |
d4a4ae04 | 961 | data->ev_enable_state = false; |
28ff344e | 962 | goto err_unlock; |
fd3ae7a9 DB |
963 | } |
964 | ||
965 | ret = kmx61_set_power_state(data, state, KMX61_ACC); | |
28ff344e DB |
966 | if (ret < 0) |
967 | goto err_unlock; | |
fd3ae7a9 | 968 | |
0475c685 | 969 | ret = kmx61_setup_any_motion_interrupt(data, state); |
fd3ae7a9 DB |
970 | if (ret < 0) { |
971 | kmx61_set_power_state(data, false, KMX61_ACC); | |
28ff344e | 972 | goto err_unlock; |
fd3ae7a9 DB |
973 | } |
974 | ||
975 | data->ev_enable_state = state; | |
28ff344e DB |
976 | |
977 | err_unlock: | |
fd3ae7a9 DB |
978 | mutex_unlock(&data->lock); |
979 | ||
28ff344e | 980 | return ret; |
fd3ae7a9 DB |
981 | } |
982 | ||
c3a23ecc DB |
983 | static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev, |
984 | struct iio_trigger *trig) | |
985 | { | |
986 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
987 | ||
fd3ae7a9 | 988 | if (data->acc_dready_trig != trig && data->motion_trig != trig) |
c3a23ecc DB |
989 | return -EINVAL; |
990 | ||
991 | return 0; | |
992 | } | |
993 | ||
994 | static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev, | |
995 | struct iio_trigger *trig) | |
996 | { | |
997 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
998 | ||
999 | if (data->mag_dready_trig != trig) | |
1000 | return -EINVAL; | |
1001 | ||
1002 | return 0; | |
1003 | } | |
1004 | ||
20ffac27 | 1005 | static const struct iio_info kmx61_acc_info = { |
20ffac27 DB |
1006 | .read_raw = kmx61_read_raw, |
1007 | .write_raw = kmx61_write_raw, | |
1008 | .attrs = &kmx61_acc_attribute_group, | |
fd3ae7a9 DB |
1009 | .read_event_value = kmx61_read_event, |
1010 | .write_event_value = kmx61_write_event, | |
1011 | .read_event_config = kmx61_read_event_config, | |
1012 | .write_event_config = kmx61_write_event_config, | |
c3a23ecc | 1013 | .validate_trigger = kmx61_acc_validate_trigger, |
20ffac27 DB |
1014 | }; |
1015 | ||
1016 | static const struct iio_info kmx61_mag_info = { | |
20ffac27 DB |
1017 | .read_raw = kmx61_read_raw, |
1018 | .write_raw = kmx61_write_raw, | |
1019 | .attrs = &kmx61_mag_attribute_group, | |
c3a23ecc | 1020 | .validate_trigger = kmx61_mag_validate_trigger, |
20ffac27 DB |
1021 | }; |
1022 | ||
c3a23ecc DB |
1023 | |
1024 | static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig, | |
1025 | bool state) | |
1026 | { | |
1027 | int ret = 0; | |
1028 | u8 device; | |
1029 | ||
1030 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
fd3ae7a9 | 1031 | struct kmx61_data *data = kmx61_get_data(indio_dev); |
c3a23ecc DB |
1032 | |
1033 | mutex_lock(&data->lock); | |
1034 | ||
fd3ae7a9 DB |
1035 | if (!state && data->ev_enable_state && data->motion_trig_on) { |
1036 | data->motion_trig_on = false; | |
28ff344e | 1037 | goto err_unlock; |
fd3ae7a9 DB |
1038 | } |
1039 | ||
dbdd0e2d | 1040 | if (data->acc_dready_trig == trig || data->motion_trig == trig) |
c3a23ecc DB |
1041 | device = KMX61_ACC; |
1042 | else | |
1043 | device = KMX61_MAG; | |
1044 | ||
1045 | ret = kmx61_set_power_state(data, state, device); | |
28ff344e DB |
1046 | if (ret < 0) |
1047 | goto err_unlock; | |
c3a23ecc | 1048 | |
fd3ae7a9 DB |
1049 | if (data->acc_dready_trig == trig || data->mag_dready_trig == trig) |
1050 | ret = kmx61_setup_new_data_interrupt(data, state, device); | |
1051 | else | |
0475c685 | 1052 | ret = kmx61_setup_any_motion_interrupt(data, state); |
c3a23ecc DB |
1053 | if (ret < 0) { |
1054 | kmx61_set_power_state(data, false, device); | |
28ff344e | 1055 | goto err_unlock; |
c3a23ecc DB |
1056 | } |
1057 | ||
1058 | if (data->acc_dready_trig == trig) | |
1059 | data->acc_dready_trig_on = state; | |
fd3ae7a9 | 1060 | else if (data->mag_dready_trig == trig) |
c3a23ecc | 1061 | data->mag_dready_trig_on = state; |
fd3ae7a9 DB |
1062 | else |
1063 | data->motion_trig_on = state; | |
28ff344e | 1064 | err_unlock: |
c3a23ecc DB |
1065 | mutex_unlock(&data->lock); |
1066 | ||
28ff344e | 1067 | return ret; |
c3a23ecc DB |
1068 | } |
1069 | ||
1070 | static int kmx61_trig_try_reenable(struct iio_trigger *trig) | |
1071 | { | |
1072 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); | |
1073 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
1074 | int ret; | |
1075 | ||
1076 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); | |
1077 | if (ret < 0) { | |
1078 | dev_err(&data->client->dev, "Error reading reg_inl\n"); | |
1079 | return ret; | |
1080 | } | |
1081 | ||
1082 | return 0; | |
1083 | } | |
1084 | ||
1085 | static const struct iio_trigger_ops kmx61_trigger_ops = { | |
1086 | .set_trigger_state = kmx61_data_rdy_trigger_set_state, | |
1087 | .try_reenable = kmx61_trig_try_reenable, | |
c3a23ecc DB |
1088 | }; |
1089 | ||
fd3ae7a9 DB |
1090 | static irqreturn_t kmx61_event_handler(int irq, void *private) |
1091 | { | |
1092 | struct kmx61_data *data = private; | |
1093 | struct iio_dev *indio_dev = data->acc_indio_dev; | |
1094 | int ret; | |
1095 | ||
1096 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1); | |
1097 | if (ret < 0) { | |
1098 | dev_err(&data->client->dev, "Error reading reg_ins1\n"); | |
1099 | goto ack_intr; | |
1100 | } | |
1101 | ||
1102 | if (ret & KMX61_REG_INS1_BIT_WUFS) { | |
1103 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2); | |
1104 | if (ret < 0) { | |
1105 | dev_err(&data->client->dev, "Error reading reg_ins2\n"); | |
1106 | goto ack_intr; | |
1107 | } | |
1108 | ||
1109 | if (ret & KMX61_REG_INS2_BIT_XN) | |
1110 | iio_push_event(indio_dev, | |
1111 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1112 | 0, | |
1113 | IIO_MOD_X, | |
1114 | IIO_EV_TYPE_THRESH, | |
1115 | IIO_EV_DIR_FALLING), | |
1116 | 0); | |
1117 | ||
1118 | if (ret & KMX61_REG_INS2_BIT_XP) | |
1119 | iio_push_event(indio_dev, | |
1120 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1121 | 0, | |
1122 | IIO_MOD_X, | |
1123 | IIO_EV_TYPE_THRESH, | |
1124 | IIO_EV_DIR_RISING), | |
1125 | 0); | |
1126 | ||
1127 | if (ret & KMX61_REG_INS2_BIT_YN) | |
1128 | iio_push_event(indio_dev, | |
1129 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1130 | 0, | |
1131 | IIO_MOD_Y, | |
1132 | IIO_EV_TYPE_THRESH, | |
1133 | IIO_EV_DIR_FALLING), | |
1134 | 0); | |
1135 | ||
1136 | if (ret & KMX61_REG_INS2_BIT_YP) | |
1137 | iio_push_event(indio_dev, | |
1138 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1139 | 0, | |
1140 | IIO_MOD_Y, | |
1141 | IIO_EV_TYPE_THRESH, | |
1142 | IIO_EV_DIR_RISING), | |
1143 | 0); | |
1144 | ||
1145 | if (ret & KMX61_REG_INS2_BIT_ZN) | |
1146 | iio_push_event(indio_dev, | |
1147 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1148 | 0, | |
1149 | IIO_MOD_Z, | |
1150 | IIO_EV_TYPE_THRESH, | |
1151 | IIO_EV_DIR_FALLING), | |
1152 | 0); | |
1153 | ||
1154 | if (ret & KMX61_REG_INS2_BIT_ZP) | |
1155 | iio_push_event(indio_dev, | |
1156 | IIO_MOD_EVENT_CODE(IIO_ACCEL, | |
1157 | 0, | |
1158 | IIO_MOD_Z, | |
1159 | IIO_EV_TYPE_THRESH, | |
1160 | IIO_EV_DIR_RISING), | |
1161 | 0); | |
1162 | } | |
1163 | ||
1164 | ack_intr: | |
1165 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); | |
1166 | if (ret < 0) | |
1167 | dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); | |
1168 | ||
1169 | ret |= KMX61_REG_CTRL1_BIT_RES; | |
1170 | ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); | |
1171 | if (ret < 0) | |
28ff344e | 1172 | dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); |
fd3ae7a9 DB |
1173 | |
1174 | ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); | |
1175 | if (ret < 0) | |
1176 | dev_err(&data->client->dev, "Error reading reg_inl\n"); | |
1177 | ||
fd3ae7a9 DB |
1178 | return IRQ_HANDLED; |
1179 | } | |
1180 | ||
c3a23ecc DB |
1181 | static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private) |
1182 | { | |
1183 | struct kmx61_data *data = private; | |
1184 | ||
1185 | if (data->acc_dready_trig_on) | |
1186 | iio_trigger_poll(data->acc_dready_trig); | |
1187 | if (data->mag_dready_trig_on) | |
1188 | iio_trigger_poll(data->mag_dready_trig); | |
1189 | ||
fd3ae7a9 DB |
1190 | if (data->motion_trig_on) |
1191 | iio_trigger_poll(data->motion_trig); | |
1192 | ||
1193 | if (data->ev_enable_state) | |
1194 | return IRQ_WAKE_THREAD; | |
c3a23ecc DB |
1195 | return IRQ_HANDLED; |
1196 | } | |
1197 | ||
1198 | static irqreturn_t kmx61_trigger_handler(int irq, void *p) | |
1199 | { | |
1200 | struct iio_poll_func *pf = p; | |
1201 | struct iio_dev *indio_dev = pf->indio_dev; | |
1202 | struct kmx61_data *data = kmx61_get_data(indio_dev); | |
1203 | int bit, ret, i = 0; | |
6a191c70 | 1204 | u8 base; |
c3a23ecc DB |
1205 | s16 buffer[8]; |
1206 | ||
6a191c70 DB |
1207 | if (indio_dev == data->acc_indio_dev) |
1208 | base = KMX61_ACC_XOUT_L; | |
1209 | else | |
1210 | base = KMX61_MAG_XOUT_L; | |
1211 | ||
c3a23ecc | 1212 | mutex_lock(&data->lock); |
70dddeee | 1213 | for_each_set_bit(bit, indio_dev->active_scan_mask, |
c3a23ecc | 1214 | indio_dev->masklength) { |
6a191c70 | 1215 | ret = kmx61_read_measurement(data, base, bit); |
c3a23ecc DB |
1216 | if (ret < 0) { |
1217 | mutex_unlock(&data->lock); | |
1218 | goto err; | |
1219 | } | |
1220 | buffer[i++] = ret; | |
1221 | } | |
1222 | mutex_unlock(&data->lock); | |
1223 | ||
1224 | iio_push_to_buffers(indio_dev, buffer); | |
1225 | err: | |
1226 | iio_trigger_notify_done(indio_dev->trig); | |
1227 | ||
1228 | return IRQ_HANDLED; | |
1229 | } | |
1230 | ||
b25862c5 DB |
1231 | static const char *kmx61_match_acpi_device(struct device *dev) |
1232 | { | |
1233 | const struct acpi_device_id *id; | |
1234 | ||
1235 | id = acpi_match_device(dev->driver->acpi_match_table, dev); | |
1236 | if (!id) | |
1237 | return NULL; | |
1238 | return dev_name(dev); | |
1239 | } | |
1240 | ||
20ffac27 DB |
1241 | static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data, |
1242 | const struct iio_info *info, | |
1243 | const struct iio_chan_spec *chan, | |
1244 | int num_channels, | |
1245 | const char *name) | |
1246 | { | |
1247 | struct iio_dev *indio_dev; | |
1248 | ||
1249 | indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data)); | |
1250 | if (!indio_dev) | |
1251 | return ERR_PTR(-ENOMEM); | |
1252 | ||
1253 | kmx61_set_data(indio_dev, data); | |
1254 | ||
1255 | indio_dev->dev.parent = &data->client->dev; | |
1256 | indio_dev->channels = chan; | |
1257 | indio_dev->num_channels = num_channels; | |
1258 | indio_dev->name = name; | |
1259 | indio_dev->modes = INDIO_DIRECT_MODE; | |
1260 | indio_dev->info = info; | |
1261 | ||
1262 | return indio_dev; | |
1263 | } | |
1264 | ||
c3a23ecc DB |
1265 | static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data, |
1266 | struct iio_dev *indio_dev, | |
1267 | const char *tag) | |
1268 | { | |
1269 | struct iio_trigger *trig; | |
1270 | int ret; | |
1271 | ||
1272 | trig = devm_iio_trigger_alloc(&data->client->dev, | |
1273 | "%s-%s-dev%d", | |
1274 | indio_dev->name, | |
1275 | tag, | |
1276 | indio_dev->id); | |
1277 | if (!trig) | |
1278 | return ERR_PTR(-ENOMEM); | |
1279 | ||
1280 | trig->dev.parent = &data->client->dev; | |
1281 | trig->ops = &kmx61_trigger_ops; | |
1282 | iio_trigger_set_drvdata(trig, indio_dev); | |
1283 | ||
1284 | ret = iio_trigger_register(trig); | |
1285 | if (ret) | |
1286 | return ERR_PTR(ret); | |
1287 | ||
1288 | return trig; | |
1289 | } | |
1290 | ||
20ffac27 DB |
1291 | static int kmx61_probe(struct i2c_client *client, |
1292 | const struct i2c_device_id *id) | |
1293 | { | |
1294 | int ret; | |
1295 | struct kmx61_data *data; | |
1296 | const char *name = NULL; | |
1297 | ||
1298 | data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); | |
1299 | if (!data) | |
1300 | return -ENOMEM; | |
1301 | ||
1302 | i2c_set_clientdata(client, data); | |
1303 | data->client = client; | |
1304 | ||
1305 | mutex_init(&data->lock); | |
1306 | ||
b25862c5 DB |
1307 | if (id) |
1308 | name = id->name; | |
1309 | else if (ACPI_HANDLE(&client->dev)) | |
1310 | name = kmx61_match_acpi_device(&client->dev); | |
1311 | else | |
1312 | return -ENODEV; | |
1313 | ||
20ffac27 DB |
1314 | data->acc_indio_dev = |
1315 | kmx61_indiodev_setup(data, &kmx61_acc_info, | |
1316 | kmx61_acc_channels, | |
1317 | ARRAY_SIZE(kmx61_acc_channels), | |
1318 | name); | |
1319 | if (IS_ERR(data->acc_indio_dev)) | |
1320 | return PTR_ERR(data->acc_indio_dev); | |
1321 | ||
1322 | data->mag_indio_dev = | |
1323 | kmx61_indiodev_setup(data, &kmx61_mag_info, | |
1324 | kmx61_mag_channels, | |
1325 | ARRAY_SIZE(kmx61_mag_channels), | |
1326 | name); | |
1327 | if (IS_ERR(data->mag_indio_dev)) | |
1328 | return PTR_ERR(data->mag_indio_dev); | |
1329 | ||
1330 | ret = kmx61_chip_init(data); | |
1331 | if (ret < 0) | |
1332 | return ret; | |
1333 | ||
c176becd | 1334 | if (client->irq > 0) { |
c3a23ecc DB |
1335 | ret = devm_request_threaded_irq(&client->dev, client->irq, |
1336 | kmx61_data_rdy_trig_poll, | |
fd3ae7a9 | 1337 | kmx61_event_handler, |
c3a23ecc DB |
1338 | IRQF_TRIGGER_RISING, |
1339 | KMX61_IRQ_NAME, | |
1340 | data); | |
1341 | if (ret) | |
1342 | goto err_chip_uninit; | |
1343 | ||
1344 | data->acc_dready_trig = | |
1345 | kmx61_trigger_setup(data, data->acc_indio_dev, | |
1346 | "dready"); | |
28ff344e DB |
1347 | if (IS_ERR(data->acc_dready_trig)) { |
1348 | ret = PTR_ERR(data->acc_dready_trig); | |
1349 | goto err_chip_uninit; | |
1350 | } | |
c3a23ecc DB |
1351 | |
1352 | data->mag_dready_trig = | |
1353 | kmx61_trigger_setup(data, data->mag_indio_dev, | |
1354 | "dready"); | |
1355 | if (IS_ERR(data->mag_dready_trig)) { | |
1356 | ret = PTR_ERR(data->mag_dready_trig); | |
28ff344e | 1357 | goto err_trigger_unregister_acc_dready; |
c3a23ecc DB |
1358 | } |
1359 | ||
fd3ae7a9 DB |
1360 | data->motion_trig = |
1361 | kmx61_trigger_setup(data, data->acc_indio_dev, | |
1362 | "any-motion"); | |
1363 | if (IS_ERR(data->motion_trig)) { | |
1364 | ret = PTR_ERR(data->motion_trig); | |
28ff344e | 1365 | goto err_trigger_unregister_mag_dready; |
fd3ae7a9 DB |
1366 | } |
1367 | ||
c3a23ecc DB |
1368 | ret = iio_triggered_buffer_setup(data->acc_indio_dev, |
1369 | &iio_pollfunc_store_time, | |
1370 | kmx61_trigger_handler, | |
1371 | NULL); | |
1372 | if (ret < 0) { | |
1373 | dev_err(&data->client->dev, | |
1374 | "Failed to setup acc triggered buffer\n"); | |
28ff344e | 1375 | goto err_trigger_unregister_motion; |
c3a23ecc DB |
1376 | } |
1377 | ||
1378 | ret = iio_triggered_buffer_setup(data->mag_indio_dev, | |
1379 | &iio_pollfunc_store_time, | |
1380 | kmx61_trigger_handler, | |
1381 | NULL); | |
1382 | if (ret < 0) { | |
1383 | dev_err(&data->client->dev, | |
1384 | "Failed to setup mag triggered buffer\n"); | |
28ff344e | 1385 | goto err_buffer_cleanup_acc; |
c3a23ecc DB |
1386 | } |
1387 | } | |
1388 | ||
7d0ead5c AR |
1389 | ret = pm_runtime_set_active(&client->dev); |
1390 | if (ret < 0) | |
1391 | goto err_buffer_cleanup_mag; | |
1392 | ||
1393 | pm_runtime_enable(&client->dev); | |
1394 | pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS); | |
1395 | pm_runtime_use_autosuspend(&client->dev); | |
1396 | ||
20ffac27 DB |
1397 | ret = iio_device_register(data->acc_indio_dev); |
1398 | if (ret < 0) { | |
1399 | dev_err(&client->dev, "Failed to register acc iio device\n"); | |
28ff344e | 1400 | goto err_buffer_cleanup_mag; |
20ffac27 DB |
1401 | } |
1402 | ||
1403 | ret = iio_device_register(data->mag_indio_dev); | |
1404 | if (ret < 0) { | |
1405 | dev_err(&client->dev, "Failed to register mag iio device\n"); | |
aff8609a | 1406 | goto err_iio_unregister_acc; |
20ffac27 DB |
1407 | } |
1408 | ||
1409 | return 0; | |
1410 | ||
aff8609a | 1411 | err_iio_unregister_acc: |
20ffac27 | 1412 | iio_device_unregister(data->acc_indio_dev); |
28ff344e | 1413 | err_buffer_cleanup_mag: |
c176becd | 1414 | if (client->irq > 0) |
c3a23ecc | 1415 | iio_triggered_buffer_cleanup(data->mag_indio_dev); |
28ff344e | 1416 | err_buffer_cleanup_acc: |
c176becd | 1417 | if (client->irq > 0) |
28ff344e DB |
1418 | iio_triggered_buffer_cleanup(data->acc_indio_dev); |
1419 | err_trigger_unregister_motion: | |
1420 | iio_trigger_unregister(data->motion_trig); | |
1421 | err_trigger_unregister_mag_dready: | |
1422 | iio_trigger_unregister(data->mag_dready_trig); | |
1423 | err_trigger_unregister_acc_dready: | |
1424 | iio_trigger_unregister(data->acc_dready_trig); | |
20ffac27 DB |
1425 | err_chip_uninit: |
1426 | kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); | |
1427 | return ret; | |
1428 | } | |
1429 | ||
1430 | static int kmx61_remove(struct i2c_client *client) | |
1431 | { | |
1432 | struct kmx61_data *data = i2c_get_clientdata(client); | |
1433 | ||
7d0ead5c AR |
1434 | iio_device_unregister(data->acc_indio_dev); |
1435 | iio_device_unregister(data->mag_indio_dev); | |
1436 | ||
aff8609a DB |
1437 | pm_runtime_disable(&client->dev); |
1438 | pm_runtime_set_suspended(&client->dev); | |
1439 | pm_runtime_put_noidle(&client->dev); | |
1440 | ||
c176becd | 1441 | if (client->irq > 0) { |
c3a23ecc DB |
1442 | iio_triggered_buffer_cleanup(data->acc_indio_dev); |
1443 | iio_triggered_buffer_cleanup(data->mag_indio_dev); | |
1444 | iio_trigger_unregister(data->acc_dready_trig); | |
1445 | iio_trigger_unregister(data->mag_dready_trig); | |
fd3ae7a9 | 1446 | iio_trigger_unregister(data->motion_trig); |
c3a23ecc DB |
1447 | } |
1448 | ||
20ffac27 DB |
1449 | mutex_lock(&data->lock); |
1450 | kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); | |
1451 | mutex_unlock(&data->lock); | |
1452 | ||
1453 | return 0; | |
1454 | } | |
1455 | ||
3b9c40e6 DB |
1456 | #ifdef CONFIG_PM_SLEEP |
1457 | static int kmx61_suspend(struct device *dev) | |
1458 | { | |
1459 | int ret; | |
1460 | struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); | |
1461 | ||
1462 | mutex_lock(&data->lock); | |
1463 | ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, | |
1464 | false); | |
1465 | mutex_unlock(&data->lock); | |
1466 | ||
1467 | return ret; | |
1468 | } | |
1469 | ||
1470 | static int kmx61_resume(struct device *dev) | |
1471 | { | |
1472 | u8 stby = 0; | |
1473 | struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); | |
1474 | ||
1475 | if (data->acc_stby) | |
1476 | stby |= KMX61_ACC_STBY_BIT; | |
1477 | if (data->mag_stby) | |
1478 | stby |= KMX61_MAG_STBY_BIT; | |
1479 | ||
1480 | return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); | |
1481 | } | |
1482 | #endif | |
aff8609a | 1483 | |
df1fad80 | 1484 | #ifdef CONFIG_PM |
aff8609a DB |
1485 | static int kmx61_runtime_suspend(struct device *dev) |
1486 | { | |
1487 | struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); | |
1488 | int ret; | |
1489 | ||
1490 | mutex_lock(&data->lock); | |
1491 | ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); | |
1492 | mutex_unlock(&data->lock); | |
1493 | ||
1494 | return ret; | |
1495 | } | |
1496 | ||
1497 | static int kmx61_runtime_resume(struct device *dev) | |
1498 | { | |
1499 | struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); | |
1500 | u8 stby = 0; | |
1501 | ||
1502 | if (!data->acc_ps) | |
1503 | stby |= KMX61_ACC_STBY_BIT; | |
1504 | if (!data->mag_ps) | |
1505 | stby |= KMX61_MAG_STBY_BIT; | |
1506 | ||
1507 | return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); | |
1508 | } | |
1509 | #endif | |
1510 | ||
1511 | static const struct dev_pm_ops kmx61_pm_ops = { | |
3b9c40e6 | 1512 | SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume) |
aff8609a DB |
1513 | SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL) |
1514 | }; | |
1515 | ||
b25862c5 DB |
1516 | static const struct acpi_device_id kmx61_acpi_match[] = { |
1517 | {"KMX61021", 0}, | |
1518 | {} | |
1519 | }; | |
1520 | ||
1521 | MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match); | |
1522 | ||
20ffac27 DB |
1523 | static const struct i2c_device_id kmx61_id[] = { |
1524 | {"kmx611021", 0}, | |
1525 | {} | |
1526 | }; | |
1527 | ||
1528 | MODULE_DEVICE_TABLE(i2c, kmx61_id); | |
1529 | ||
1530 | static struct i2c_driver kmx61_driver = { | |
1531 | .driver = { | |
1532 | .name = KMX61_DRV_NAME, | |
b25862c5 | 1533 | .acpi_match_table = ACPI_PTR(kmx61_acpi_match), |
aff8609a | 1534 | .pm = &kmx61_pm_ops, |
20ffac27 DB |
1535 | }, |
1536 | .probe = kmx61_probe, | |
1537 | .remove = kmx61_remove, | |
1538 | .id_table = kmx61_id, | |
1539 | }; | |
1540 | ||
1541 | module_i2c_driver(kmx61_driver); | |
1542 | ||
1543 | MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); | |
1544 | MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver"); | |
1545 | MODULE_LICENSE("GPL v2"); |