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15#include <linux/module.h>
16#include <linux/i2c.h>
17#include <linux/interrupt.h>
18#include <linux/delay.h>
19#include <linux/bitops.h>
20#include <linux/slab.h>
21#include <linux/string.h>
22#include <linux/acpi.h>
23#include <linux/pm.h>
24#include <linux/pm_runtime.h>
25#include <linux/iio/iio.h>
26#include <linux/iio/sysfs.h>
27#include <linux/iio/buffer.h>
28#include <linux/iio/trigger.h>
29#include <linux/iio/events.h>
30#include <linux/iio/trigger_consumer.h>
31#include <linux/iio/triggered_buffer.h>
32#include <linux/iio/accel/kxcjk_1013.h>
33
34#define KXCJK1013_DRV_NAME "kxcjk1013"
35#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
36
37#define KXCJK1013_REG_XOUT_L 0x06
38
39
40
41
42
43#define KXCJK1013_REG_XOUT_H 0x07
44#define KXCJK1013_REG_YOUT_L 0x08
45#define KXCJK1013_REG_YOUT_H 0x09
46#define KXCJK1013_REG_ZOUT_L 0x0A
47#define KXCJK1013_REG_ZOUT_H 0x0B
48
49#define KXCJK1013_REG_DCST_RESP 0x0C
50#define KXCJK1013_REG_WHO_AM_I 0x0F
51#define KXCJK1013_REG_INT_SRC1 0x16
52#define KXCJK1013_REG_INT_SRC2 0x17
53#define KXCJK1013_REG_STATUS_REG 0x18
54#define KXCJK1013_REG_INT_REL 0x1A
55#define KXCJK1013_REG_CTRL1 0x1B
56#define KXCJK1013_REG_CTRL2 0x1D
57#define KXCJK1013_REG_INT_CTRL1 0x1E
58#define KXCJK1013_REG_INT_CTRL2 0x1F
59#define KXCJK1013_REG_DATA_CTRL 0x21
60#define KXCJK1013_REG_WAKE_TIMER 0x29
61#define KXCJK1013_REG_SELF_TEST 0x3A
62#define KXCJK1013_REG_WAKE_THRES 0x6A
63
64#define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
65#define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
66#define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
67#define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
68#define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
69#define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
70#define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4)
71#define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5)
72
73#define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
74#define KXCJK1013_MAX_STARTUP_TIME_US 100000
75
76#define KXCJK1013_SLEEP_DELAY_MS 2000
77
78#define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
79#define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
80#define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
81#define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
82#define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
83#define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
84
85#define KXCJK1013_DEFAULT_WAKE_THRES 1
86
87enum kx_chipset {
88 KXCJK1013,
89 KXCJ91008,
90 KXTJ21009,
91 KX_MAX_CHIPS
92};
93
94struct kxcjk1013_data {
95 struct i2c_client *client;
96 struct iio_trigger *dready_trig;
97 struct iio_trigger *motion_trig;
98 struct mutex mutex;
99 s16 buffer[8];
100 u8 odr_bits;
101 u8 range;
102 int wake_thres;
103 int wake_dur;
104 bool active_high_intr;
105 bool dready_trigger_on;
106 int ev_enable_state;
107 bool motion_trigger_on;
108 int64_t timestamp;
109 enum kx_chipset chipset;
110 bool is_smo8500_device;
111};
112
113enum kxcjk1013_axis {
114 AXIS_X,
115 AXIS_Y,
116 AXIS_Z,
117 AXIS_MAX,
118};
119
120enum kxcjk1013_mode {
121 STANDBY,
122 OPERATION,
123};
124
125enum kxcjk1013_range {
126 KXCJK1013_RANGE_2G,
127 KXCJK1013_RANGE_4G,
128 KXCJK1013_RANGE_8G,
129};
130
131static const struct {
132 int val;
133 int val2;
134 int odr_bits;
135} samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
136 {3, 125000, 0x0A}, {6, 250000, 0x0B}, {12, 500000, 0},
137 {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
138 {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
139 {1600, 0, 0x07} };
140
141
142static const struct {
143 int odr_bits;
144 int usec;
145} odr_start_up_times[KX_MAX_CHIPS][12] = {
146
147 {
148 {0x08, 100000},
149 {0x09, 100000},
150 {0x0A, 100000},
151 {0x0B, 100000},
152 {0, 80000},
153 {0x01, 41000},
154 {0x02, 21000},
155 {0x03, 11000},
156 {0x04, 6400},
157 {0x05, 3900},
158 {0x06, 2700},
159 {0x07, 2100},
160 },
161
162 {
163 {0x08, 100000},
164 {0x09, 100000},
165 {0x0A, 100000},
166 {0x0B, 100000},
167 {0, 80000},
168 {0x01, 41000},
169 {0x02, 21000},
170 {0x03, 11000},
171 {0x04, 6400},
172 {0x05, 3900},
173 {0x06, 2700},
174 {0x07, 2100},
175 },
176
177 {
178 {0x08, 1240000},
179 {0x09, 621000},
180 {0x0A, 309000},
181 {0x0B, 151000},
182 {0, 80000},
183 {0x01, 41000},
184 {0x02, 21000},
185 {0x03, 11000},
186 {0x04, 6000},
187 {0x05, 4000},
188 {0x06, 3000},
189 {0x07, 2000},
190 },
191};
192
193static const struct {
194 u16 scale;
195 u8 gsel_0;
196 u8 gsel_1;
197} KXCJK1013_scale_table[] = { {9582, 0, 0},
198 {19163, 1, 0},
199 {38326, 0, 1} };
200
201static const struct {
202 int val;
203 int val2;
204 int odr_bits;
205} wake_odr_data_rate_table[] = { {0, 781000, 0x00},
206 {1, 563000, 0x01},
207 {3, 125000, 0x02},
208 {6, 250000, 0x03},
209 {12, 500000, 0x04},
210 {25, 0, 0x05},
211 {50, 0, 0x06},
212 {100, 0, 0x06},
213 {200, 0, 0x06},
214 {400, 0, 0x06},
215 {800, 0, 0x06},
216 {1600, 0, 0x06} };
217
218static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
219 enum kxcjk1013_mode mode)
220{
221 int ret;
222
223 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
224 if (ret < 0) {
225 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
226 return ret;
227 }
228
229 if (mode == STANDBY)
230 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
231 else
232 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
233
234 ret = i2c_smbus_write_byte_data(data->client,
235 KXCJK1013_REG_CTRL1, ret);
236 if (ret < 0) {
237 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
238 return ret;
239 }
240
241 return 0;
242}
243
244static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
245 enum kxcjk1013_mode *mode)
246{
247 int ret;
248
249 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
250 if (ret < 0) {
251 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
252 return ret;
253 }
254
255 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
256 *mode = OPERATION;
257 else
258 *mode = STANDBY;
259
260 return 0;
261}
262
263static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
264{
265 int ret;
266
267 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
268 if (ret < 0) {
269 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
270 return ret;
271 }
272
273 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
274 KXCJK1013_REG_CTRL1_BIT_GSEL1);
275 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
276 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
277
278 ret = i2c_smbus_write_byte_data(data->client,
279 KXCJK1013_REG_CTRL1,
280 ret);
281 if (ret < 0) {
282 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
283 return ret;
284 }
285
286 data->range = range_index;
287
288 return 0;
289}
290
291static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
292{
293 int ret;
294
295 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
296 if (ret < 0) {
297 dev_err(&data->client->dev, "Error reading who_am_i\n");
298 return ret;
299 }
300
301 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
302
303 ret = kxcjk1013_set_mode(data, STANDBY);
304 if (ret < 0)
305 return ret;
306
307 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
308 if (ret < 0) {
309 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
310 return ret;
311 }
312
313
314 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
315
316 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
317 ret);
318 if (ret < 0) {
319 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
320 return ret;
321 }
322
323
324 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
325 if (ret < 0)
326 return ret;
327
328 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
329 if (ret < 0) {
330 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
331 return ret;
332 }
333
334 data->odr_bits = ret;
335
336
337 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
338 if (ret < 0) {
339 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
340 return ret;
341 }
342
343 if (data->active_high_intr)
344 ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
345 else
346 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
347
348 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
349 ret);
350 if (ret < 0) {
351 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
352 return ret;
353 }
354
355 ret = kxcjk1013_set_mode(data, OPERATION);
356 if (ret < 0)
357 return ret;
358
359 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
360
361 return 0;
362}
363
364#ifdef CONFIG_PM
365static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
366{
367 int i;
368 int idx = data->chipset;
369
370 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
371 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
372 return odr_start_up_times[idx][i].usec;
373 }
374
375 return KXCJK1013_MAX_STARTUP_TIME_US;
376}
377#endif
378
379static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
380{
381#ifdef CONFIG_PM
382 int ret;
383
384 if (on)
385 ret = pm_runtime_get_sync(&data->client->dev);
386 else {
387 pm_runtime_mark_last_busy(&data->client->dev);
388 ret = pm_runtime_put_autosuspend(&data->client->dev);
389 }
390 if (ret < 0) {
391 dev_err(&data->client->dev,
392 "Failed: kxcjk1013_set_power_state for %d\n", on);
393 if (on)
394 pm_runtime_put_noidle(&data->client->dev);
395 return ret;
396 }
397#endif
398
399 return 0;
400}
401
402static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
403{
404 int ret;
405
406 ret = i2c_smbus_write_byte_data(data->client,
407 KXCJK1013_REG_WAKE_TIMER,
408 data->wake_dur);
409 if (ret < 0) {
410 dev_err(&data->client->dev,
411 "Error writing reg_wake_timer\n");
412 return ret;
413 }
414
415 ret = i2c_smbus_write_byte_data(data->client,
416 KXCJK1013_REG_WAKE_THRES,
417 data->wake_thres);
418 if (ret < 0) {
419 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
420 return ret;
421 }
422
423 return 0;
424}
425
426static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
427 bool status)
428{
429 int ret;
430 enum kxcjk1013_mode store_mode;
431
432 ret = kxcjk1013_get_mode(data, &store_mode);
433 if (ret < 0)
434 return ret;
435
436
437 ret = kxcjk1013_set_mode(data, STANDBY);
438 if (ret < 0)
439 return ret;
440
441 ret = kxcjk1013_chip_update_thresholds(data);
442 if (ret < 0)
443 return ret;
444
445 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
446 if (ret < 0) {
447 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
448 return ret;
449 }
450
451 if (status)
452 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
453 else
454 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
455
456 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
457 ret);
458 if (ret < 0) {
459 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
460 return ret;
461 }
462
463 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
464 if (ret < 0) {
465 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
466 return ret;
467 }
468
469 if (status)
470 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
471 else
472 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
473
474 ret = i2c_smbus_write_byte_data(data->client,
475 KXCJK1013_REG_CTRL1, ret);
476 if (ret < 0) {
477 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
478 return ret;
479 }
480
481 if (store_mode == OPERATION) {
482 ret = kxcjk1013_set_mode(data, OPERATION);
483 if (ret < 0)
484 return ret;
485 }
486
487 return 0;
488}
489
490static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
491 bool status)
492{
493 int ret;
494 enum kxcjk1013_mode store_mode;
495
496 ret = kxcjk1013_get_mode(data, &store_mode);
497 if (ret < 0)
498 return ret;
499
500
501 ret = kxcjk1013_set_mode(data, STANDBY);
502 if (ret < 0)
503 return ret;
504
505 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
506 if (ret < 0) {
507 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
508 return ret;
509 }
510
511 if (status)
512 ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
513 else
514 ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
515
516 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
517 ret);
518 if (ret < 0) {
519 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
520 return ret;
521 }
522
523 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
524 if (ret < 0) {
525 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
526 return ret;
527 }
528
529 if (status)
530 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
531 else
532 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
533
534 ret = i2c_smbus_write_byte_data(data->client,
535 KXCJK1013_REG_CTRL1, ret);
536 if (ret < 0) {
537 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
538 return ret;
539 }
540
541 if (store_mode == OPERATION) {
542 ret = kxcjk1013_set_mode(data, OPERATION);
543 if (ret < 0)
544 return ret;
545 }
546
547 return 0;
548}
549
550static int kxcjk1013_convert_freq_to_bit(int val, int val2)
551{
552 int i;
553
554 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
555 if (samp_freq_table[i].val == val &&
556 samp_freq_table[i].val2 == val2) {
557 return samp_freq_table[i].odr_bits;
558 }
559 }
560
561 return -EINVAL;
562}
563
564static int kxcjk1013_convert_wake_odr_to_bit(int val, int val2)
565{
566 int i;
567
568 for (i = 0; i < ARRAY_SIZE(wake_odr_data_rate_table); ++i) {
569 if (wake_odr_data_rate_table[i].val == val &&
570 wake_odr_data_rate_table[i].val2 == val2) {
571 return wake_odr_data_rate_table[i].odr_bits;
572 }
573 }
574
575 return -EINVAL;
576}
577
578static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
579{
580 int ret;
581 int odr_bits;
582 enum kxcjk1013_mode store_mode;
583
584 ret = kxcjk1013_get_mode(data, &store_mode);
585 if (ret < 0)
586 return ret;
587
588 odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
589 if (odr_bits < 0)
590 return odr_bits;
591
592
593 ret = kxcjk1013_set_mode(data, STANDBY);
594 if (ret < 0)
595 return ret;
596
597 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
598 odr_bits);
599 if (ret < 0) {
600 dev_err(&data->client->dev, "Error writing data_ctrl\n");
601 return ret;
602 }
603
604 data->odr_bits = odr_bits;
605
606 odr_bits = kxcjk1013_convert_wake_odr_to_bit(val, val2);
607 if (odr_bits < 0)
608 return odr_bits;
609
610 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
611 odr_bits);
612 if (ret < 0) {
613 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
614 return ret;
615 }
616
617 if (store_mode == OPERATION) {
618 ret = kxcjk1013_set_mode(data, OPERATION);
619 if (ret < 0)
620 return ret;
621 }
622
623 return 0;
624}
625
626static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
627{
628 int i;
629
630 for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
631 if (samp_freq_table[i].odr_bits == data->odr_bits) {
632 *val = samp_freq_table[i].val;
633 *val2 = samp_freq_table[i].val2;
634 return IIO_VAL_INT_PLUS_MICRO;
635 }
636 }
637
638 return -EINVAL;
639}
640
641static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
642{
643 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
644 int ret;
645
646 ret = i2c_smbus_read_word_data(data->client, reg);
647 if (ret < 0) {
648 dev_err(&data->client->dev,
649 "failed to read accel_%c registers\n", 'x' + axis);
650 return ret;
651 }
652
653 return ret;
654}
655
656static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
657{
658 int ret, i;
659 enum kxcjk1013_mode store_mode;
660
661 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
662 if (KXCJK1013_scale_table[i].scale == val) {
663 ret = kxcjk1013_get_mode(data, &store_mode);
664 if (ret < 0)
665 return ret;
666
667 ret = kxcjk1013_set_mode(data, STANDBY);
668 if (ret < 0)
669 return ret;
670
671 ret = kxcjk1013_set_range(data, i);
672 if (ret < 0)
673 return ret;
674
675 if (store_mode == OPERATION) {
676 ret = kxcjk1013_set_mode(data, OPERATION);
677 if (ret)
678 return ret;
679 }
680
681 return 0;
682 }
683 }
684
685 return -EINVAL;
686}
687
688static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
689 struct iio_chan_spec const *chan, int *val,
690 int *val2, long mask)
691{
692 struct kxcjk1013_data *data = iio_priv(indio_dev);
693 int ret;
694
695 switch (mask) {
696 case IIO_CHAN_INFO_RAW:
697 mutex_lock(&data->mutex);
698 if (iio_buffer_enabled(indio_dev))
699 ret = -EBUSY;
700 else {
701 ret = kxcjk1013_set_power_state(data, true);
702 if (ret < 0) {
703 mutex_unlock(&data->mutex);
704 return ret;
705 }
706 ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
707 if (ret < 0) {
708 kxcjk1013_set_power_state(data, false);
709 mutex_unlock(&data->mutex);
710 return ret;
711 }
712 *val = sign_extend32(ret >> 4, 11);
713 ret = kxcjk1013_set_power_state(data, false);
714 }
715 mutex_unlock(&data->mutex);
716
717 if (ret < 0)
718 return ret;
719
720 return IIO_VAL_INT;
721
722 case IIO_CHAN_INFO_SCALE:
723 *val = 0;
724 *val2 = KXCJK1013_scale_table[data->range].scale;
725 return IIO_VAL_INT_PLUS_MICRO;
726
727 case IIO_CHAN_INFO_SAMP_FREQ:
728 mutex_lock(&data->mutex);
729 ret = kxcjk1013_get_odr(data, val, val2);
730 mutex_unlock(&data->mutex);
731 return ret;
732
733 default:
734 return -EINVAL;
735 }
736}
737
738static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
739 struct iio_chan_spec const *chan, int val,
740 int val2, long mask)
741{
742 struct kxcjk1013_data *data = iio_priv(indio_dev);
743 int ret;
744
745 switch (mask) {
746 case IIO_CHAN_INFO_SAMP_FREQ:
747 mutex_lock(&data->mutex);
748 ret = kxcjk1013_set_odr(data, val, val2);
749 mutex_unlock(&data->mutex);
750 break;
751 case IIO_CHAN_INFO_SCALE:
752 if (val)
753 return -EINVAL;
754
755 mutex_lock(&data->mutex);
756 ret = kxcjk1013_set_scale(data, val2);
757 mutex_unlock(&data->mutex);
758 break;
759 default:
760 ret = -EINVAL;
761 }
762
763 return ret;
764}
765
766static int kxcjk1013_read_event(struct iio_dev *indio_dev,
767 const struct iio_chan_spec *chan,
768 enum iio_event_type type,
769 enum iio_event_direction dir,
770 enum iio_event_info info,
771 int *val, int *val2)
772{
773 struct kxcjk1013_data *data = iio_priv(indio_dev);
774
775 *val2 = 0;
776 switch (info) {
777 case IIO_EV_INFO_VALUE:
778 *val = data->wake_thres;
779 break;
780 case IIO_EV_INFO_PERIOD:
781 *val = data->wake_dur;
782 break;
783 default:
784 return -EINVAL;
785 }
786
787 return IIO_VAL_INT;
788}
789
790static int kxcjk1013_write_event(struct iio_dev *indio_dev,
791 const struct iio_chan_spec *chan,
792 enum iio_event_type type,
793 enum iio_event_direction dir,
794 enum iio_event_info info,
795 int val, int val2)
796{
797 struct kxcjk1013_data *data = iio_priv(indio_dev);
798
799 if (data->ev_enable_state)
800 return -EBUSY;
801
802 switch (info) {
803 case IIO_EV_INFO_VALUE:
804 data->wake_thres = val;
805 break;
806 case IIO_EV_INFO_PERIOD:
807 data->wake_dur = val;
808 break;
809 default:
810 return -EINVAL;
811 }
812
813 return 0;
814}
815
816static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
817 const struct iio_chan_spec *chan,
818 enum iio_event_type type,
819 enum iio_event_direction dir)
820{
821 struct kxcjk1013_data *data = iio_priv(indio_dev);
822
823 return data->ev_enable_state;
824}
825
826static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
827 const struct iio_chan_spec *chan,
828 enum iio_event_type type,
829 enum iio_event_direction dir,
830 int state)
831{
832 struct kxcjk1013_data *data = iio_priv(indio_dev);
833 int ret;
834
835 if (state && data->ev_enable_state)
836 return 0;
837
838 mutex_lock(&data->mutex);
839
840 if (!state && data->motion_trigger_on) {
841 data->ev_enable_state = 0;
842 mutex_unlock(&data->mutex);
843 return 0;
844 }
845
846
847
848
849
850
851
852
853
854
855 ret = kxcjk1013_set_power_state(data, state);
856 if (ret < 0) {
857 mutex_unlock(&data->mutex);
858 return ret;
859 }
860
861 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
862 if (ret < 0) {
863 kxcjk1013_set_power_state(data, false);
864 data->ev_enable_state = 0;
865 mutex_unlock(&data->mutex);
866 return ret;
867 }
868
869 data->ev_enable_state = state;
870 mutex_unlock(&data->mutex);
871
872 return 0;
873}
874
875static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
876{
877 struct kxcjk1013_data *data = iio_priv(indio_dev);
878
879 return kxcjk1013_set_power_state(data, true);
880}
881
882static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
883{
884 struct kxcjk1013_data *data = iio_priv(indio_dev);
885
886 return kxcjk1013_set_power_state(data, false);
887}
888
889static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
890 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
891
892static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
893
894static struct attribute *kxcjk1013_attributes[] = {
895 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
896 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
897 NULL,
898};
899
900static const struct attribute_group kxcjk1013_attrs_group = {
901 .attrs = kxcjk1013_attributes,
902};
903
904static const struct iio_event_spec kxcjk1013_event = {
905 .type = IIO_EV_TYPE_THRESH,
906 .dir = IIO_EV_DIR_EITHER,
907 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
908 BIT(IIO_EV_INFO_ENABLE) |
909 BIT(IIO_EV_INFO_PERIOD)
910};
911
912#define KXCJK1013_CHANNEL(_axis) { \
913 .type = IIO_ACCEL, \
914 .modified = 1, \
915 .channel2 = IIO_MOD_##_axis, \
916 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
917 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
918 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
919 .scan_index = AXIS_##_axis, \
920 .scan_type = { \
921 .sign = 's', \
922 .realbits = 12, \
923 .storagebits = 16, \
924 .shift = 4, \
925 .endianness = IIO_LE, \
926 }, \
927 .event_spec = &kxcjk1013_event, \
928 .num_event_specs = 1 \
929}
930
931static const struct iio_chan_spec kxcjk1013_channels[] = {
932 KXCJK1013_CHANNEL(X),
933 KXCJK1013_CHANNEL(Y),
934 KXCJK1013_CHANNEL(Z),
935 IIO_CHAN_SOFT_TIMESTAMP(3),
936};
937
938static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
939 .preenable = kxcjk1013_buffer_preenable,
940 .postenable = iio_triggered_buffer_postenable,
941 .postdisable = kxcjk1013_buffer_postdisable,
942 .predisable = iio_triggered_buffer_predisable,
943};
944
945static const struct iio_info kxcjk1013_info = {
946 .attrs = &kxcjk1013_attrs_group,
947 .read_raw = kxcjk1013_read_raw,
948 .write_raw = kxcjk1013_write_raw,
949 .read_event_value = kxcjk1013_read_event,
950 .write_event_value = kxcjk1013_write_event,
951 .write_event_config = kxcjk1013_write_event_config,
952 .read_event_config = kxcjk1013_read_event_config,
953 .driver_module = THIS_MODULE,
954};
955
956static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
957
958static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
959{
960 struct iio_poll_func *pf = p;
961 struct iio_dev *indio_dev = pf->indio_dev;
962 struct kxcjk1013_data *data = iio_priv(indio_dev);
963 int ret;
964
965 mutex_lock(&data->mutex);
966 ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
967 KXCJK1013_REG_XOUT_L,
968 AXIS_MAX * 2,
969 (u8 *)data->buffer);
970 mutex_unlock(&data->mutex);
971 if (ret < 0)
972 goto err;
973
974 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
975 data->timestamp);
976err:
977 iio_trigger_notify_done(indio_dev->trig);
978
979 return IRQ_HANDLED;
980}
981
982static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
983{
984 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
985 struct kxcjk1013_data *data = iio_priv(indio_dev);
986 int ret;
987
988 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
989 if (ret < 0) {
990 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
991 return ret;
992 }
993
994 return 0;
995}
996
997static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
998 bool state)
999{
1000 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1001 struct kxcjk1013_data *data = iio_priv(indio_dev);
1002 int ret;
1003
1004 mutex_lock(&data->mutex);
1005
1006 if (!state && data->ev_enable_state && data->motion_trigger_on) {
1007 data->motion_trigger_on = false;
1008 mutex_unlock(&data->mutex);
1009 return 0;
1010 }
1011
1012 ret = kxcjk1013_set_power_state(data, state);
1013 if (ret < 0) {
1014 mutex_unlock(&data->mutex);
1015 return ret;
1016 }
1017 if (data->motion_trig == trig)
1018 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1019 else
1020 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1021 if (ret < 0) {
1022 kxcjk1013_set_power_state(data, false);
1023 mutex_unlock(&data->mutex);
1024 return ret;
1025 }
1026 if (data->motion_trig == trig)
1027 data->motion_trigger_on = state;
1028 else
1029 data->dready_trigger_on = state;
1030
1031 mutex_unlock(&data->mutex);
1032
1033 return 0;
1034}
1035
1036static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1037 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1038 .try_reenable = kxcjk1013_trig_try_reen,
1039 .owner = THIS_MODULE,
1040};
1041
1042static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1043{
1044 struct iio_dev *indio_dev = private;
1045 struct kxcjk1013_data *data = iio_priv(indio_dev);
1046 int ret;
1047
1048 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1049 if (ret < 0) {
1050 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1051 goto ack_intr;
1052 }
1053
1054 if (ret & 0x02) {
1055 ret = i2c_smbus_read_byte_data(data->client,
1056 KXCJK1013_REG_INT_SRC2);
1057 if (ret < 0) {
1058 dev_err(&data->client->dev,
1059 "Error reading reg_int_src2\n");
1060 goto ack_intr;
1061 }
1062
1063 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1064 iio_push_event(indio_dev,
1065 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1066 0,
1067 IIO_MOD_X,
1068 IIO_EV_TYPE_THRESH,
1069 IIO_EV_DIR_FALLING),
1070 data->timestamp);
1071 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1072 iio_push_event(indio_dev,
1073 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1074 0,
1075 IIO_MOD_X,
1076 IIO_EV_TYPE_THRESH,
1077 IIO_EV_DIR_RISING),
1078 data->timestamp);
1079
1080
1081 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1082 iio_push_event(indio_dev,
1083 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1084 0,
1085 IIO_MOD_Y,
1086 IIO_EV_TYPE_THRESH,
1087 IIO_EV_DIR_FALLING),
1088 data->timestamp);
1089 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1090 iio_push_event(indio_dev,
1091 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1092 0,
1093 IIO_MOD_Y,
1094 IIO_EV_TYPE_THRESH,
1095 IIO_EV_DIR_RISING),
1096 data->timestamp);
1097
1098 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1099 iio_push_event(indio_dev,
1100 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1101 0,
1102 IIO_MOD_Z,
1103 IIO_EV_TYPE_THRESH,
1104 IIO_EV_DIR_FALLING),
1105 data->timestamp);
1106 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1107 iio_push_event(indio_dev,
1108 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1109 0,
1110 IIO_MOD_Z,
1111 IIO_EV_TYPE_THRESH,
1112 IIO_EV_DIR_RISING),
1113 data->timestamp);
1114 }
1115
1116ack_intr:
1117 if (data->dready_trigger_on)
1118 return IRQ_HANDLED;
1119
1120 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1121 if (ret < 0)
1122 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1123
1124 return IRQ_HANDLED;
1125}
1126
1127static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1128{
1129 struct iio_dev *indio_dev = private;
1130 struct kxcjk1013_data *data = iio_priv(indio_dev);
1131
1132 data->timestamp = iio_get_time_ns(indio_dev);
1133
1134 if (data->dready_trigger_on)
1135 iio_trigger_poll(data->dready_trig);
1136 else if (data->motion_trigger_on)
1137 iio_trigger_poll(data->motion_trig);
1138
1139 if (data->ev_enable_state)
1140 return IRQ_WAKE_THREAD;
1141 else
1142 return IRQ_HANDLED;
1143}
1144
1145static const char *kxcjk1013_match_acpi_device(struct device *dev,
1146 enum kx_chipset *chipset,
1147 bool *is_smo8500_device)
1148{
1149 const struct acpi_device_id *id;
1150
1151 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1152 if (!id)
1153 return NULL;
1154
1155 if (strcmp(id->id, "SMO8500") == 0)
1156 *is_smo8500_device = true;
1157
1158 *chipset = (enum kx_chipset)id->driver_data;
1159
1160 return dev_name(dev);
1161}
1162
1163static int kxcjk1013_probe(struct i2c_client *client,
1164 const struct i2c_device_id *id)
1165{
1166 struct kxcjk1013_data *data;
1167 struct iio_dev *indio_dev;
1168 struct kxcjk_1013_platform_data *pdata;
1169 const char *name;
1170 int ret;
1171
1172 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1173 if (!indio_dev)
1174 return -ENOMEM;
1175
1176 data = iio_priv(indio_dev);
1177 i2c_set_clientdata(client, indio_dev);
1178 data->client = client;
1179
1180 pdata = dev_get_platdata(&client->dev);
1181 if (pdata)
1182 data->active_high_intr = pdata->active_high_intr;
1183 else
1184 data->active_high_intr = true;
1185
1186 if (id) {
1187 data->chipset = (enum kx_chipset)(id->driver_data);
1188 name = id->name;
1189 } else if (ACPI_HANDLE(&client->dev)) {
1190 name = kxcjk1013_match_acpi_device(&client->dev,
1191 &data->chipset,
1192 &data->is_smo8500_device);
1193 } else
1194 return -ENODEV;
1195
1196 ret = kxcjk1013_chip_init(data);
1197 if (ret < 0)
1198 return ret;
1199
1200 mutex_init(&data->mutex);
1201
1202 indio_dev->dev.parent = &client->dev;
1203 indio_dev->channels = kxcjk1013_channels;
1204 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1205 indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1206 indio_dev->name = name;
1207 indio_dev->modes = INDIO_DIRECT_MODE;
1208 indio_dev->info = &kxcjk1013_info;
1209
1210 if (client->irq > 0 && !data->is_smo8500_device) {
1211 ret = devm_request_threaded_irq(&client->dev, client->irq,
1212 kxcjk1013_data_rdy_trig_poll,
1213 kxcjk1013_event_handler,
1214 IRQF_TRIGGER_RISING,
1215 KXCJK1013_IRQ_NAME,
1216 indio_dev);
1217 if (ret)
1218 goto err_poweroff;
1219
1220 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1221 "%s-dev%d",
1222 indio_dev->name,
1223 indio_dev->id);
1224 if (!data->dready_trig) {
1225 ret = -ENOMEM;
1226 goto err_poweroff;
1227 }
1228
1229 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1230 "%s-any-motion-dev%d",
1231 indio_dev->name,
1232 indio_dev->id);
1233 if (!data->motion_trig) {
1234 ret = -ENOMEM;
1235 goto err_poweroff;
1236 }
1237
1238 data->dready_trig->dev.parent = &client->dev;
1239 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1240 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1241 indio_dev->trig = data->dready_trig;
1242 iio_trigger_get(indio_dev->trig);
1243 ret = iio_trigger_register(data->dready_trig);
1244 if (ret)
1245 goto err_poweroff;
1246
1247 data->motion_trig->dev.parent = &client->dev;
1248 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1249 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1250 ret = iio_trigger_register(data->motion_trig);
1251 if (ret) {
1252 data->motion_trig = NULL;
1253 goto err_trigger_unregister;
1254 }
1255 }
1256
1257 ret = iio_triggered_buffer_setup(indio_dev,
1258 &iio_pollfunc_store_time,
1259 kxcjk1013_trigger_handler,
1260 &kxcjk1013_buffer_setup_ops);
1261 if (ret < 0) {
1262 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1263 goto err_trigger_unregister;
1264 }
1265
1266 ret = pm_runtime_set_active(&client->dev);
1267 if (ret)
1268 goto err_buffer_cleanup;
1269
1270 pm_runtime_enable(&client->dev);
1271 pm_runtime_set_autosuspend_delay(&client->dev,
1272 KXCJK1013_SLEEP_DELAY_MS);
1273 pm_runtime_use_autosuspend(&client->dev);
1274
1275 ret = iio_device_register(indio_dev);
1276 if (ret < 0) {
1277 dev_err(&client->dev, "unable to register iio device\n");
1278 goto err_buffer_cleanup;
1279 }
1280
1281 return 0;
1282
1283err_buffer_cleanup:
1284 if (data->dready_trig)
1285 iio_triggered_buffer_cleanup(indio_dev);
1286err_trigger_unregister:
1287 if (data->dready_trig)
1288 iio_trigger_unregister(data->dready_trig);
1289 if (data->motion_trig)
1290 iio_trigger_unregister(data->motion_trig);
1291err_poweroff:
1292 kxcjk1013_set_mode(data, STANDBY);
1293
1294 return ret;
1295}
1296
1297static int kxcjk1013_remove(struct i2c_client *client)
1298{
1299 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1300 struct kxcjk1013_data *data = iio_priv(indio_dev);
1301
1302 iio_device_unregister(indio_dev);
1303
1304 pm_runtime_disable(&client->dev);
1305 pm_runtime_set_suspended(&client->dev);
1306 pm_runtime_put_noidle(&client->dev);
1307
1308 if (data->dready_trig) {
1309 iio_triggered_buffer_cleanup(indio_dev);
1310 iio_trigger_unregister(data->dready_trig);
1311 iio_trigger_unregister(data->motion_trig);
1312 }
1313
1314 mutex_lock(&data->mutex);
1315 kxcjk1013_set_mode(data, STANDBY);
1316 mutex_unlock(&data->mutex);
1317
1318 return 0;
1319}
1320
1321#ifdef CONFIG_PM_SLEEP
1322static int kxcjk1013_suspend(struct device *dev)
1323{
1324 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1325 struct kxcjk1013_data *data = iio_priv(indio_dev);
1326 int ret;
1327
1328 mutex_lock(&data->mutex);
1329 ret = kxcjk1013_set_mode(data, STANDBY);
1330 mutex_unlock(&data->mutex);
1331
1332 return ret;
1333}
1334
1335static int kxcjk1013_resume(struct device *dev)
1336{
1337 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1338 struct kxcjk1013_data *data = iio_priv(indio_dev);
1339 int ret = 0;
1340
1341 mutex_lock(&data->mutex);
1342 ret = kxcjk1013_set_mode(data, OPERATION);
1343 mutex_unlock(&data->mutex);
1344
1345 return ret;
1346}
1347#endif
1348
1349#ifdef CONFIG_PM
1350static int kxcjk1013_runtime_suspend(struct device *dev)
1351{
1352 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1353 struct kxcjk1013_data *data = iio_priv(indio_dev);
1354 int ret;
1355
1356 ret = kxcjk1013_set_mode(data, STANDBY);
1357 if (ret < 0) {
1358 dev_err(&data->client->dev, "powering off device failed\n");
1359 return -EAGAIN;
1360 }
1361 return 0;
1362}
1363
1364static int kxcjk1013_runtime_resume(struct device *dev)
1365{
1366 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1367 struct kxcjk1013_data *data = iio_priv(indio_dev);
1368 int ret;
1369 int sleep_val;
1370
1371 ret = kxcjk1013_set_mode(data, OPERATION);
1372 if (ret < 0)
1373 return ret;
1374
1375 sleep_val = kxcjk1013_get_startup_times(data);
1376 if (sleep_val < 20000)
1377 usleep_range(sleep_val, 20000);
1378 else
1379 msleep_interruptible(sleep_val/1000);
1380
1381 return 0;
1382}
1383#endif
1384
1385static const struct dev_pm_ops kxcjk1013_pm_ops = {
1386 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1387 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1388 kxcjk1013_runtime_resume, NULL)
1389};
1390
1391static const struct acpi_device_id kx_acpi_match[] = {
1392 {"KXCJ1013", KXCJK1013},
1393 {"KXCJ1008", KXCJ91008},
1394 {"KXCJ9000", KXCJ91008},
1395 {"KIOX000A", KXCJ91008},
1396 {"KXTJ1009", KXTJ21009},
1397 {"SMO8500", KXCJ91008},
1398 { },
1399};
1400MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1401
1402static const struct i2c_device_id kxcjk1013_id[] = {
1403 {"kxcjk1013", KXCJK1013},
1404 {"kxcj91008", KXCJ91008},
1405 {"kxtj21009", KXTJ21009},
1406 {"SMO8500", KXCJ91008},
1407 {}
1408};
1409
1410MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1411
1412static struct i2c_driver kxcjk1013_driver = {
1413 .driver = {
1414 .name = KXCJK1013_DRV_NAME,
1415 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1416 .pm = &kxcjk1013_pm_ops,
1417 },
1418 .probe = kxcjk1013_probe,
1419 .remove = kxcjk1013_remove,
1420 .id_table = kxcjk1013_id,
1421};
1422module_i2c_driver(kxcjk1013_driver);
1423
1424MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1425MODULE_LICENSE("GPL v2");
1426MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
1427
