1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * KXCJK-1013 3-axis accelerometer driver
4 * Copyright (c) 2014, Intel Corporation.
5 */
6
7 #include <linux/module.h>
8 #include <linux/i2c.h>
9 #include <linux/interrupt.h>
10 #include <linux/delay.h>
11 #include <linux/bitops.h>
12 #include <linux/slab.h>
13 #include <linux/string.h>
14 #include <linux/acpi.h>
15 #include <linux/pm.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/iio/iio.h>
18 #include <linux/iio/sysfs.h>
19 #include <linux/iio/buffer.h>
20 #include <linux/iio/trigger.h>
21 #include <linux/iio/events.h>
22 #include <linux/iio/trigger_consumer.h>
23 #include <linux/iio/triggered_buffer.h>
24 #include <linux/iio/accel/kxcjk_1013.h>
25
26 #define KXCJK1013_DRV_NAME "kxcjk1013"
27 #define KXCJK1013_IRQ_NAME "kxcjk1013_event"
28
29 #define KXTF9_REG_HP_XOUT_L 0x00
30 #define KXTF9_REG_HP_XOUT_H 0x01
31 #define KXTF9_REG_HP_YOUT_L 0x02
32 #define KXTF9_REG_HP_YOUT_H 0x03
33 #define KXTF9_REG_HP_ZOUT_L 0x04
34 #define KXTF9_REG_HP_ZOUT_H 0x05
35
36 #define KXCJK1013_REG_XOUT_L 0x06
37 /*
38 * From low byte X axis register, all the other addresses of Y and Z can be
39 * obtained by just applying axis offset. The following axis defines are just
40 * provide clarity, but not used.
41 */
42 #define KXCJK1013_REG_XOUT_H 0x07
43 #define KXCJK1013_REG_YOUT_L 0x08
44 #define KXCJK1013_REG_YOUT_H 0x09
45 #define KXCJK1013_REG_ZOUT_L 0x0A
46 #define KXCJK1013_REG_ZOUT_H 0x0B
47
48 #define KXCJK1013_REG_DCST_RESP 0x0C
49 #define KXCJK1013_REG_WHO_AM_I 0x0F
50 #define KXTF9_REG_TILT_POS_CUR 0x10
51 #define KXTF9_REG_TILT_POS_PREV 0x11
52 #define KXTF9_REG_INT_SRC1 0x15
53 #define KXCJK1013_REG_INT_SRC1 0x16 /* compatible, but called INT_SRC2 in KXTF9 ds */
54 #define KXCJK1013_REG_INT_SRC2 0x17
55 #define KXCJK1013_REG_STATUS_REG 0x18
56 #define KXCJK1013_REG_INT_REL 0x1A
57 #define KXCJK1013_REG_CTRL1 0x1B
58 #define KXTF9_REG_CTRL2 0x1C
59 #define KXCJK1013_REG_CTRL2 0x1D /* mostly compatible, CTRL_REG3 in KTXF9 ds */
60 #define KXCJK1013_REG_INT_CTRL1 0x1E
61 #define KXCJK1013_REG_INT_CTRL2 0x1F
62 #define KXTF9_REG_INT_CTRL3 0x20
63 #define KXCJK1013_REG_DATA_CTRL 0x21
64 #define KXTF9_REG_TILT_TIMER 0x28
65 #define KXCJK1013_REG_WAKE_TIMER 0x29
66 #define KXTF9_REG_TDT_TIMER 0x2B
67 #define KXTF9_REG_TDT_THRESH_H 0x2C
68 #define KXTF9_REG_TDT_THRESH_L 0x2D
69 #define KXTF9_REG_TDT_TAP_TIMER 0x2E
70 #define KXTF9_REG_TDT_TOTAL_TIMER 0x2F
71 #define KXTF9_REG_TDT_LATENCY_TIMER 0x30
72 #define KXTF9_REG_TDT_WINDOW_TIMER 0x31
73 #define KXCJK1013_REG_SELF_TEST 0x3A
74 #define KXTF9_REG_WAKE_THRESH 0x5A
75 #define KXTF9_REG_TILT_ANGLE 0x5C
76 #define KXTF9_REG_HYST_SET 0x5F
77 #define KXCJK1013_REG_WAKE_THRES 0x6A
78
79 #define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
80 #define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
81 #define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
82 #define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
83 #define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
84 #define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
85
86 #define KXCJK1013_REG_INT_CTRL1_BIT_IEU BIT(2) /* KXTF9 */
87 #define KXCJK1013_REG_INT_CTRL1_BIT_IEL BIT(3)
88 #define KXCJK1013_REG_INT_CTRL1_BIT_IEA BIT(4)
89 #define KXCJK1013_REG_INT_CTRL1_BIT_IEN BIT(5)
90
91 #define KXTF9_REG_TILT_BIT_LEFT_EDGE BIT(5)
92 #define KXTF9_REG_TILT_BIT_RIGHT_EDGE BIT(4)
93 #define KXTF9_REG_TILT_BIT_LOWER_EDGE BIT(3)
94 #define KXTF9_REG_TILT_BIT_UPPER_EDGE BIT(2)
95 #define KXTF9_REG_TILT_BIT_FACE_DOWN BIT(1)
96 #define KXTF9_REG_TILT_BIT_FACE_UP BIT(0)
97
98 #define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
99 #define KXCJK1013_MAX_STARTUP_TIME_US 100000
100
101 #define KXCJK1013_SLEEP_DELAY_MS 2000
102
103 #define KXCJK1013_REG_INT_SRC1_BIT_TPS BIT(0) /* KXTF9 */
104 #define KXCJK1013_REG_INT_SRC1_BIT_WUFS BIT(1)
105 #define KXCJK1013_REG_INT_SRC1_MASK_TDTS (BIT(2) | BIT(3)) /* KXTF9 */
106 #define KXCJK1013_REG_INT_SRC1_TAP_NONE 0
107 #define KXCJK1013_REG_INT_SRC1_TAP_SINGLE BIT(2)
108 #define KXCJK1013_REG_INT_SRC1_TAP_DOUBLE BIT(3)
109 #define KXCJK1013_REG_INT_SRC1_BIT_DRDY BIT(4)
110
111 /* KXCJK: INT_SOURCE2: motion detect, KXTF9: INT_SRC_REG1: tap detect */
112 #define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
113 #define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
114 #define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
115 #define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
116 #define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
117 #define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
118
119 #define KXCJK1013_DEFAULT_WAKE_THRES 1
120
121 enum kx_chipset {
122 KXCJK1013,
123 KXCJ91008,
124 KXTJ21009,
125 KXTF9,
126 KX_MAX_CHIPS /* this must be last */
127 };
128
129 enum kx_acpi_type {
130 ACPI_GENERIC,
131 ACPI_SMO8500,
132 ACPI_KIOX010A,
133 };
134
135 enum kxcjk1013_axis {
136 AXIS_X,
137 AXIS_Y,
138 AXIS_Z,
139 AXIS_MAX
140 };
141
142 struct kxcjk1013_data {
143 struct i2c_client *client;
144 struct iio_trigger *dready_trig;
145 struct iio_trigger *motion_trig;
146 struct iio_mount_matrix orientation;
147 struct mutex mutex;
148 /* Ensure timestamp naturally aligned */
149 struct {
150 s16 chans[AXIS_MAX];
151 s64 timestamp __aligned(8);
152 } scan;
153 u8 odr_bits;
154 u8 range;
155 int wake_thres;
156 int wake_dur;
157 bool active_high_intr;
158 bool dready_trigger_on;
159 int ev_enable_state;
160 bool motion_trigger_on;
161 int64_t timestamp;
162 enum kx_chipset chipset;
163 enum kx_acpi_type acpi_type;
164 };
165
166 enum kxcjk1013_mode {
167 STANDBY,
168 OPERATION,
169 };
170
171 enum kxcjk1013_range {
172 KXCJK1013_RANGE_2G,
173 KXCJK1013_RANGE_4G,
174 KXCJK1013_RANGE_8G,
175 };
176
177 struct kx_odr_map {
178 int val;
179 int val2;
180 int odr_bits;
181 int wuf_bits;
182 };
183
184 static const struct kx_odr_map samp_freq_table[] = {
185 { 0, 781000, 0x08, 0x00 },
186 { 1, 563000, 0x09, 0x01 },
187 { 3, 125000, 0x0A, 0x02 },
188 { 6, 250000, 0x0B, 0x03 },
189 { 12, 500000, 0x00, 0x04 },
190 { 25, 0, 0x01, 0x05 },
191 { 50, 0, 0x02, 0x06 },
192 { 100, 0, 0x03, 0x06 },
193 { 200, 0, 0x04, 0x06 },
194 { 400, 0, 0x05, 0x06 },
195 { 800, 0, 0x06, 0x06 },
196 { 1600, 0, 0x07, 0x06 },
197 };
198
199 static const char *const kxcjk1013_samp_freq_avail =
200 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600";
201
202 static const struct kx_odr_map kxtf9_samp_freq_table[] = {
203 { 25, 0, 0x01, 0x00 },
204 { 50, 0, 0x02, 0x01 },
205 { 100, 0, 0x03, 0x01 },
206 { 200, 0, 0x04, 0x01 },
207 { 400, 0, 0x05, 0x01 },
208 { 800, 0, 0x06, 0x01 },
209 };
210
211 static const char *const kxtf9_samp_freq_avail =
212 "25 50 100 200 400 800";
213
214 /* Refer to section 4 of the specification */
215 static const struct {
216 int odr_bits;
217 int usec;
218 } odr_start_up_times[KX_MAX_CHIPS][12] = {
219 /* KXCJK-1013 */
220 {
221 {0x08, 100000},
222 {0x09, 100000},
223 {0x0A, 100000},
224 {0x0B, 100000},
225 {0, 80000},
226 {0x01, 41000},
227 {0x02, 21000},
228 {0x03, 11000},
229 {0x04, 6400},
230 {0x05, 3900},
231 {0x06, 2700},
232 {0x07, 2100},
233 },
234 /* KXCJ9-1008 */
235 {
236 {0x08, 100000},
237 {0x09, 100000},
238 {0x0A, 100000},
239 {0x0B, 100000},
240 {0, 80000},
241 {0x01, 41000},
242 {0x02, 21000},
243 {0x03, 11000},
244 {0x04, 6400},
245 {0x05, 3900},
246 {0x06, 2700},
247 {0x07, 2100},
248 },
249 /* KXCTJ2-1009 */
250 {
251 {0x08, 1240000},
252 {0x09, 621000},
253 {0x0A, 309000},
254 {0x0B, 151000},
255 {0, 80000},
256 {0x01, 41000},
257 {0x02, 21000},
258 {0x03, 11000},
259 {0x04, 6000},
260 {0x05, 4000},
261 {0x06, 3000},
262 {0x07, 2000},
263 },
264 /* KXTF9 */
265 {
266 {0x01, 81000},
267 {0x02, 41000},
268 {0x03, 21000},
269 {0x04, 11000},
270 {0x05, 5100},
271 {0x06, 2700},
272 },
273 };
274
275 static const struct {
276 u16 scale;
277 u8 gsel_0;
278 u8 gsel_1;
279 } KXCJK1013_scale_table[] = { {9582, 0, 0},
280 {19163, 1, 0},
281 {38326, 0, 1} };
282
283 #ifdef CONFIG_ACPI
284 enum kiox010a_fn_index {
285 KIOX010A_SET_LAPTOP_MODE = 1,
286 KIOX010A_SET_TABLET_MODE = 2,
287 };
288
kiox010a_dsm(struct device * dev,int fn_index)289 static int kiox010a_dsm(struct device *dev, int fn_index)
290 {
291 acpi_handle handle = ACPI_HANDLE(dev);
292 guid_t kiox010a_dsm_guid;
293 union acpi_object *obj;
294
295 if (!handle)
296 return -ENODEV;
297
298 guid_parse("1f339696-d475-4e26-8cad-2e9f8e6d7a91", &kiox010a_dsm_guid);
299
300 obj = acpi_evaluate_dsm(handle, &kiox010a_dsm_guid, 1, fn_index, NULL);
301 if (!obj)
302 return -EIO;
303
304 ACPI_FREE(obj);
305 return 0;
306 }
307 #endif
308
kxcjk1013_set_mode(struct kxcjk1013_data * data,enum kxcjk1013_mode mode)309 static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
310 enum kxcjk1013_mode mode)
311 {
312 int ret;
313
314 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
315 if (ret < 0) {
316 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
317 return ret;
318 }
319
320 if (mode == STANDBY)
321 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
322 else
323 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
324
325 ret = i2c_smbus_write_byte_data(data->client,
326 KXCJK1013_REG_CTRL1, ret);
327 if (ret < 0) {
328 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
329 return ret;
330 }
331
332 return 0;
333 }
334
kxcjk1013_get_mode(struct kxcjk1013_data * data,enum kxcjk1013_mode * mode)335 static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
336 enum kxcjk1013_mode *mode)
337 {
338 int ret;
339
340 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
341 if (ret < 0) {
342 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
343 return ret;
344 }
345
346 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
347 *mode = OPERATION;
348 else
349 *mode = STANDBY;
350
351 return 0;
352 }
353
kxcjk1013_set_range(struct kxcjk1013_data * data,int range_index)354 static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
355 {
356 int ret;
357
358 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
359 if (ret < 0) {
360 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
361 return ret;
362 }
363
364 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
365 KXCJK1013_REG_CTRL1_BIT_GSEL1);
366 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
367 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
368
369 ret = i2c_smbus_write_byte_data(data->client,
370 KXCJK1013_REG_CTRL1,
371 ret);
372 if (ret < 0) {
373 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
374 return ret;
375 }
376
377 data->range = range_index;
378
379 return 0;
380 }
381
kxcjk1013_chip_init(struct kxcjk1013_data * data)382 static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
383 {
384 int ret;
385
386 #ifdef CONFIG_ACPI
387 if (data->acpi_type == ACPI_KIOX010A) {
388 /* Make sure the kbd and touchpad on 2-in-1s using 2 KXCJ91008-s work */
389 kiox010a_dsm(&data->client->dev, KIOX010A_SET_LAPTOP_MODE);
390 }
391 #endif
392
393 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
394 if (ret < 0) {
395 dev_err(&data->client->dev, "Error reading who_am_i\n");
396 return ret;
397 }
398
399 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
400
401 ret = kxcjk1013_set_mode(data, STANDBY);
402 if (ret < 0)
403 return ret;
404
405 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
406 if (ret < 0) {
407 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
408 return ret;
409 }
410
411 /* Set 12 bit mode */
412 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
413
414 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
415 ret);
416 if (ret < 0) {
417 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
418 return ret;
419 }
420
421 /* Setting range to 4G */
422 ret = kxcjk1013_set_range(data, KXCJK1013_RANGE_4G);
423 if (ret < 0)
424 return ret;
425
426 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
427 if (ret < 0) {
428 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
429 return ret;
430 }
431
432 data->odr_bits = ret;
433
434 /* Set up INT polarity */
435 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
436 if (ret < 0) {
437 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
438 return ret;
439 }
440
441 if (data->active_high_intr)
442 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEA;
443 else
444 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEA;
445
446 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
447 ret);
448 if (ret < 0) {
449 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
450 return ret;
451 }
452
453 ret = kxcjk1013_set_mode(data, OPERATION);
454 if (ret < 0)
455 return ret;
456
457 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
458
459 return 0;
460 }
461
462 #ifdef CONFIG_PM
kxcjk1013_get_startup_times(struct kxcjk1013_data * data)463 static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
464 {
465 int i;
466 int idx = data->chipset;
467
468 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
469 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
470 return odr_start_up_times[idx][i].usec;
471 }
472
473 return KXCJK1013_MAX_STARTUP_TIME_US;
474 }
475 #endif
476
kxcjk1013_set_power_state(struct kxcjk1013_data * data,bool on)477 static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
478 {
479 #ifdef CONFIG_PM
480 int ret;
481
482 if (on)
483 ret = pm_runtime_get_sync(&data->client->dev);
484 else {
485 pm_runtime_mark_last_busy(&data->client->dev);
486 ret = pm_runtime_put_autosuspend(&data->client->dev);
487 }
488 if (ret < 0) {
489 dev_err(&data->client->dev,
490 "Failed: %s for %d\n", __func__, on);
491 if (on)
492 pm_runtime_put_noidle(&data->client->dev);
493 return ret;
494 }
495 #endif
496
497 return 0;
498 }
499
kxcjk1013_chip_update_thresholds(struct kxcjk1013_data * data)500 static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
501 {
502 int waketh_reg, ret;
503
504 ret = i2c_smbus_write_byte_data(data->client,
505 KXCJK1013_REG_WAKE_TIMER,
506 data->wake_dur);
507 if (ret < 0) {
508 dev_err(&data->client->dev,
509 "Error writing reg_wake_timer\n");
510 return ret;
511 }
512
513 waketh_reg = data->chipset == KXTF9 ?
514 KXTF9_REG_WAKE_THRESH : KXCJK1013_REG_WAKE_THRES;
515 ret = i2c_smbus_write_byte_data(data->client, waketh_reg,
516 data->wake_thres);
517 if (ret < 0) {
518 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
519 return ret;
520 }
521
522 return 0;
523 }
524
kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data * data,bool status)525 static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
526 bool status)
527 {
528 int ret;
529 enum kxcjk1013_mode store_mode;
530
531 ret = kxcjk1013_get_mode(data, &store_mode);
532 if (ret < 0)
533 return ret;
534
535 /* This is requirement by spec to change state to STANDBY */
536 ret = kxcjk1013_set_mode(data, STANDBY);
537 if (ret < 0)
538 return ret;
539
540 ret = kxcjk1013_chip_update_thresholds(data);
541 if (ret < 0)
542 return ret;
543
544 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
545 if (ret < 0) {
546 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
547 return ret;
548 }
549
550 if (status)
551 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
552 else
553 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
554
555 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
556 ret);
557 if (ret < 0) {
558 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
559 return ret;
560 }
561
562 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
563 if (ret < 0) {
564 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
565 return ret;
566 }
567
568 if (status)
569 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
570 else
571 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
572
573 ret = i2c_smbus_write_byte_data(data->client,
574 KXCJK1013_REG_CTRL1, ret);
575 if (ret < 0) {
576 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
577 return ret;
578 }
579
580 if (store_mode == OPERATION) {
581 ret = kxcjk1013_set_mode(data, OPERATION);
582 if (ret < 0)
583 return ret;
584 }
585
586 return 0;
587 }
588
kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data * data,bool status)589 static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
590 bool status)
591 {
592 int ret;
593 enum kxcjk1013_mode store_mode;
594
595 ret = kxcjk1013_get_mode(data, &store_mode);
596 if (ret < 0)
597 return ret;
598
599 /* This is requirement by spec to change state to STANDBY */
600 ret = kxcjk1013_set_mode(data, STANDBY);
601 if (ret < 0)
602 return ret;
603
604 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
605 if (ret < 0) {
606 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
607 return ret;
608 }
609
610 if (status)
611 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
612 else
613 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
614
615 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
616 ret);
617 if (ret < 0) {
618 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
619 return ret;
620 }
621
622 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
623 if (ret < 0) {
624 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
625 return ret;
626 }
627
628 if (status)
629 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
630 else
631 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
632
633 ret = i2c_smbus_write_byte_data(data->client,
634 KXCJK1013_REG_CTRL1, ret);
635 if (ret < 0) {
636 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
637 return ret;
638 }
639
640 if (store_mode == OPERATION) {
641 ret = kxcjk1013_set_mode(data, OPERATION);
642 if (ret < 0)
643 return ret;
644 }
645
646 return 0;
647 }
648
kxcjk1013_find_odr_value(const struct kx_odr_map * map,size_t map_size,int val,int val2)649 static const struct kx_odr_map *kxcjk1013_find_odr_value(
650 const struct kx_odr_map *map, size_t map_size, int val, int val2)
651 {
652 int i;
653
654 for (i = 0; i < map_size; ++i) {
655 if (map[i].val == val && map[i].val2 == val2)
656 return &map[i];
657 }
658
659 return ERR_PTR(-EINVAL);
660 }
661
kxcjk1013_convert_odr_value(const struct kx_odr_map * map,size_t map_size,int odr_bits,int * val,int * val2)662 static int kxcjk1013_convert_odr_value(const struct kx_odr_map *map,
663 size_t map_size, int odr_bits,
664 int *val, int *val2)
665 {
666 int i;
667
668 for (i = 0; i < map_size; ++i) {
669 if (map[i].odr_bits == odr_bits) {
670 *val = map[i].val;
671 *val2 = map[i].val2;
672 return IIO_VAL_INT_PLUS_MICRO;
673 }
674 }
675
676 return -EINVAL;
677 }
678
kxcjk1013_set_odr(struct kxcjk1013_data * data,int val,int val2)679 static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
680 {
681 int ret;
682 enum kxcjk1013_mode store_mode;
683 const struct kx_odr_map *odr_setting;
684
685 ret = kxcjk1013_get_mode(data, &store_mode);
686 if (ret < 0)
687 return ret;
688
689 if (data->chipset == KXTF9)
690 odr_setting = kxcjk1013_find_odr_value(kxtf9_samp_freq_table,
691 ARRAY_SIZE(kxtf9_samp_freq_table),
692 val, val2);
693 else
694 odr_setting = kxcjk1013_find_odr_value(samp_freq_table,
695 ARRAY_SIZE(samp_freq_table),
696 val, val2);
697
698 if (IS_ERR(odr_setting))
699 return PTR_ERR(odr_setting);
700
701 /* To change ODR, the chip must be set to STANDBY as per spec */
702 ret = kxcjk1013_set_mode(data, STANDBY);
703 if (ret < 0)
704 return ret;
705
706 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
707 odr_setting->odr_bits);
708 if (ret < 0) {
709 dev_err(&data->client->dev, "Error writing data_ctrl\n");
710 return ret;
711 }
712
713 data->odr_bits = odr_setting->odr_bits;
714
715 ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL2,
716 odr_setting->wuf_bits);
717 if (ret < 0) {
718 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
719 return ret;
720 }
721
722 if (store_mode == OPERATION) {
723 ret = kxcjk1013_set_mode(data, OPERATION);
724 if (ret < 0)
725 return ret;
726 }
727
728 return 0;
729 }
730
kxcjk1013_get_odr(struct kxcjk1013_data * data,int * val,int * val2)731 static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
732 {
733 if (data->chipset == KXTF9)
734 return kxcjk1013_convert_odr_value(kxtf9_samp_freq_table,
735 ARRAY_SIZE(kxtf9_samp_freq_table),
736 data->odr_bits, val, val2);
737 else
738 return kxcjk1013_convert_odr_value(samp_freq_table,
739 ARRAY_SIZE(samp_freq_table),
740 data->odr_bits, val, val2);
741 }
742
kxcjk1013_get_acc_reg(struct kxcjk1013_data * data,int axis)743 static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
744 {
745 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
746 int ret;
747
748 ret = i2c_smbus_read_word_data(data->client, reg);
749 if (ret < 0) {
750 dev_err(&data->client->dev,
751 "failed to read accel_%c registers\n", 'x' + axis);
752 return ret;
753 }
754
755 return ret;
756 }
757
kxcjk1013_set_scale(struct kxcjk1013_data * data,int val)758 static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
759 {
760 int ret, i;
761 enum kxcjk1013_mode store_mode;
762
763 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
764 if (KXCJK1013_scale_table[i].scale == val) {
765 ret = kxcjk1013_get_mode(data, &store_mode);
766 if (ret < 0)
767 return ret;
768
769 ret = kxcjk1013_set_mode(data, STANDBY);
770 if (ret < 0)
771 return ret;
772
773 ret = kxcjk1013_set_range(data, i);
774 if (ret < 0)
775 return ret;
776
777 if (store_mode == OPERATION) {
778 ret = kxcjk1013_set_mode(data, OPERATION);
779 if (ret)
780 return ret;
781 }
782
783 return 0;
784 }
785 }
786
787 return -EINVAL;
788 }
789
kxcjk1013_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long mask)790 static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
791 struct iio_chan_spec const *chan, int *val,
792 int *val2, long mask)
793 {
794 struct kxcjk1013_data *data = iio_priv(indio_dev);
795 int ret;
796
797 switch (mask) {
798 case IIO_CHAN_INFO_RAW:
799 mutex_lock(&data->mutex);
800 if (iio_buffer_enabled(indio_dev))
801 ret = -EBUSY;
802 else {
803 ret = kxcjk1013_set_power_state(data, true);
804 if (ret < 0) {
805 mutex_unlock(&data->mutex);
806 return ret;
807 }
808 ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
809 if (ret < 0) {
810 kxcjk1013_set_power_state(data, false);
811 mutex_unlock(&data->mutex);
812 return ret;
813 }
814 *val = sign_extend32(ret >> 4, 11);
815 ret = kxcjk1013_set_power_state(data, false);
816 }
817 mutex_unlock(&data->mutex);
818
819 if (ret < 0)
820 return ret;
821
822 return IIO_VAL_INT;
823
824 case IIO_CHAN_INFO_SCALE:
825 *val = 0;
826 *val2 = KXCJK1013_scale_table[data->range].scale;
827 return IIO_VAL_INT_PLUS_MICRO;
828
829 case IIO_CHAN_INFO_SAMP_FREQ:
830 mutex_lock(&data->mutex);
831 ret = kxcjk1013_get_odr(data, val, val2);
832 mutex_unlock(&data->mutex);
833 return ret;
834
835 default:
836 return -EINVAL;
837 }
838 }
839
kxcjk1013_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long mask)840 static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
841 struct iio_chan_spec const *chan, int val,
842 int val2, long mask)
843 {
844 struct kxcjk1013_data *data = iio_priv(indio_dev);
845 int ret;
846
847 switch (mask) {
848 case IIO_CHAN_INFO_SAMP_FREQ:
849 mutex_lock(&data->mutex);
850 ret = kxcjk1013_set_odr(data, val, val2);
851 mutex_unlock(&data->mutex);
852 break;
853 case IIO_CHAN_INFO_SCALE:
854 if (val)
855 return -EINVAL;
856
857 mutex_lock(&data->mutex);
858 ret = kxcjk1013_set_scale(data, val2);
859 mutex_unlock(&data->mutex);
860 break;
861 default:
862 ret = -EINVAL;
863 }
864
865 return ret;
866 }
867
kxcjk1013_read_event(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,enum iio_event_info info,int * val,int * val2)868 static int kxcjk1013_read_event(struct iio_dev *indio_dev,
869 const struct iio_chan_spec *chan,
870 enum iio_event_type type,
871 enum iio_event_direction dir,
872 enum iio_event_info info,
873 int *val, int *val2)
874 {
875 struct kxcjk1013_data *data = iio_priv(indio_dev);
876
877 *val2 = 0;
878 switch (info) {
879 case IIO_EV_INFO_VALUE:
880 *val = data->wake_thres;
881 break;
882 case IIO_EV_INFO_PERIOD:
883 *val = data->wake_dur;
884 break;
885 default:
886 return -EINVAL;
887 }
888
889 return IIO_VAL_INT;
890 }
891
kxcjk1013_write_event(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,enum iio_event_info info,int val,int val2)892 static int kxcjk1013_write_event(struct iio_dev *indio_dev,
893 const struct iio_chan_spec *chan,
894 enum iio_event_type type,
895 enum iio_event_direction dir,
896 enum iio_event_info info,
897 int val, int val2)
898 {
899 struct kxcjk1013_data *data = iio_priv(indio_dev);
900
901 if (data->ev_enable_state)
902 return -EBUSY;
903
904 switch (info) {
905 case IIO_EV_INFO_VALUE:
906 data->wake_thres = val;
907 break;
908 case IIO_EV_INFO_PERIOD:
909 data->wake_dur = val;
910 break;
911 default:
912 return -EINVAL;
913 }
914
915 return 0;
916 }
917
kxcjk1013_read_event_config(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir)918 static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
919 const struct iio_chan_spec *chan,
920 enum iio_event_type type,
921 enum iio_event_direction dir)
922 {
923 struct kxcjk1013_data *data = iio_priv(indio_dev);
924
925 return data->ev_enable_state;
926 }
927
kxcjk1013_write_event_config(struct iio_dev * indio_dev,const struct iio_chan_spec * chan,enum iio_event_type type,enum iio_event_direction dir,int state)928 static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
929 const struct iio_chan_spec *chan,
930 enum iio_event_type type,
931 enum iio_event_direction dir,
932 int state)
933 {
934 struct kxcjk1013_data *data = iio_priv(indio_dev);
935 int ret;
936
937 if (state && data->ev_enable_state)
938 return 0;
939
940 mutex_lock(&data->mutex);
941
942 if (!state && data->motion_trigger_on) {
943 data->ev_enable_state = 0;
944 mutex_unlock(&data->mutex);
945 return 0;
946 }
947
948 /*
949 * We will expect the enable and disable to do operation in
950 * in reverse order. This will happen here anyway as our
951 * resume operation uses sync mode runtime pm calls, the
952 * suspend operation will be delayed by autosuspend delay
953 * So the disable operation will still happen in reverse of
954 * enable operation. When runtime pm is disabled the mode
955 * is always on so sequence doesn't matter
956 */
957 ret = kxcjk1013_set_power_state(data, state);
958 if (ret < 0) {
959 mutex_unlock(&data->mutex);
960 return ret;
961 }
962
963 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
964 if (ret < 0) {
965 kxcjk1013_set_power_state(data, false);
966 data->ev_enable_state = 0;
967 mutex_unlock(&data->mutex);
968 return ret;
969 }
970
971 data->ev_enable_state = state;
972 mutex_unlock(&data->mutex);
973
974 return 0;
975 }
976
kxcjk1013_buffer_preenable(struct iio_dev * indio_dev)977 static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
978 {
979 struct kxcjk1013_data *data = iio_priv(indio_dev);
980
981 return kxcjk1013_set_power_state(data, true);
982 }
983
kxcjk1013_buffer_postdisable(struct iio_dev * indio_dev)984 static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
985 {
986 struct kxcjk1013_data *data = iio_priv(indio_dev);
987
988 return kxcjk1013_set_power_state(data, false);
989 }
990
kxcjk1013_get_samp_freq_avail(struct device * dev,struct device_attribute * attr,char * buf)991 static ssize_t kxcjk1013_get_samp_freq_avail(struct device *dev,
992 struct device_attribute *attr,
993 char *buf)
994 {
995 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
996 struct kxcjk1013_data *data = iio_priv(indio_dev);
997 const char *str;
998
999 if (data->chipset == KXTF9)
1000 str = kxtf9_samp_freq_avail;
1001 else
1002 str = kxcjk1013_samp_freq_avail;
1003
1004 return sprintf(buf, "%s\n", str);
1005 }
1006
1007 static IIO_DEVICE_ATTR(in_accel_sampling_frequency_available, S_IRUGO,
1008 kxcjk1013_get_samp_freq_avail, NULL, 0);
1009
1010 static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
1011
1012 static struct attribute *kxcjk1013_attributes[] = {
1013 &iio_dev_attr_in_accel_sampling_frequency_available.dev_attr.attr,
1014 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
1015 NULL,
1016 };
1017
1018 static const struct attribute_group kxcjk1013_attrs_group = {
1019 .attrs = kxcjk1013_attributes,
1020 };
1021
1022 static const struct iio_event_spec kxcjk1013_event = {
1023 .type = IIO_EV_TYPE_THRESH,
1024 .dir = IIO_EV_DIR_EITHER,
1025 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1026 BIT(IIO_EV_INFO_ENABLE) |
1027 BIT(IIO_EV_INFO_PERIOD)
1028 };
1029
1030 static const struct iio_mount_matrix *
kxcjk1013_get_mount_matrix(const struct iio_dev * indio_dev,const struct iio_chan_spec * chan)1031 kxcjk1013_get_mount_matrix(const struct iio_dev *indio_dev,
1032 const struct iio_chan_spec *chan)
1033 {
1034 struct kxcjk1013_data *data = iio_priv(indio_dev);
1035
1036 return &data->orientation;
1037 }
1038
1039 static const struct iio_chan_spec_ext_info kxcjk1013_ext_info[] = {
1040 IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, kxcjk1013_get_mount_matrix),
1041 { }
1042 };
1043
1044 #define KXCJK1013_CHANNEL(_axis) { \
1045 .type = IIO_ACCEL, \
1046 .modified = 1, \
1047 .channel2 = IIO_MOD_##_axis, \
1048 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
1049 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
1050 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1051 .scan_index = AXIS_##_axis, \
1052 .scan_type = { \
1053 .sign = 's', \
1054 .realbits = 12, \
1055 .storagebits = 16, \
1056 .shift = 4, \
1057 .endianness = IIO_LE, \
1058 }, \
1059 .event_spec = &kxcjk1013_event, \
1060 .ext_info = kxcjk1013_ext_info, \
1061 .num_event_specs = 1 \
1062 }
1063
1064 static const struct iio_chan_spec kxcjk1013_channels[] = {
1065 KXCJK1013_CHANNEL(X),
1066 KXCJK1013_CHANNEL(Y),
1067 KXCJK1013_CHANNEL(Z),
1068 IIO_CHAN_SOFT_TIMESTAMP(3),
1069 };
1070
1071 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
1072 .preenable = kxcjk1013_buffer_preenable,
1073 .postdisable = kxcjk1013_buffer_postdisable,
1074 };
1075
1076 static const struct iio_info kxcjk1013_info = {
1077 .attrs = &kxcjk1013_attrs_group,
1078 .read_raw = kxcjk1013_read_raw,
1079 .write_raw = kxcjk1013_write_raw,
1080 .read_event_value = kxcjk1013_read_event,
1081 .write_event_value = kxcjk1013_write_event,
1082 .write_event_config = kxcjk1013_write_event_config,
1083 .read_event_config = kxcjk1013_read_event_config,
1084 };
1085
1086 static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
1087
kxcjk1013_trigger_handler(int irq,void * p)1088 static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
1089 {
1090 struct iio_poll_func *pf = p;
1091 struct iio_dev *indio_dev = pf->indio_dev;
1092 struct kxcjk1013_data *data = iio_priv(indio_dev);
1093 int ret;
1094
1095 mutex_lock(&data->mutex);
1096 ret = i2c_smbus_read_i2c_block_data_or_emulated(data->client,
1097 KXCJK1013_REG_XOUT_L,
1098 AXIS_MAX * 2,
1099 (u8 *)data->scan.chans);
1100 mutex_unlock(&data->mutex);
1101 if (ret < 0)
1102 goto err;
1103
1104 iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
1105 data->timestamp);
1106 err:
1107 iio_trigger_notify_done(indio_dev->trig);
1108
1109 return IRQ_HANDLED;
1110 }
1111
kxcjk1013_trig_try_reen(struct iio_trigger * trig)1112 static int kxcjk1013_trig_try_reen(struct iio_trigger *trig)
1113 {
1114 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1115 struct kxcjk1013_data *data = iio_priv(indio_dev);
1116 int ret;
1117
1118 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1119 if (ret < 0) {
1120 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1121 return ret;
1122 }
1123
1124 return 0;
1125 }
1126
kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger * trig,bool state)1127 static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
1128 bool state)
1129 {
1130 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1131 struct kxcjk1013_data *data = iio_priv(indio_dev);
1132 int ret;
1133
1134 mutex_lock(&data->mutex);
1135
1136 if (!state && data->ev_enable_state && data->motion_trigger_on) {
1137 data->motion_trigger_on = false;
1138 mutex_unlock(&data->mutex);
1139 return 0;
1140 }
1141
1142 ret = kxcjk1013_set_power_state(data, state);
1143 if (ret < 0) {
1144 mutex_unlock(&data->mutex);
1145 return ret;
1146 }
1147 if (data->motion_trig == trig)
1148 ret = kxcjk1013_setup_any_motion_interrupt(data, state);
1149 else
1150 ret = kxcjk1013_setup_new_data_interrupt(data, state);
1151 if (ret < 0) {
1152 kxcjk1013_set_power_state(data, false);
1153 mutex_unlock(&data->mutex);
1154 return ret;
1155 }
1156 if (data->motion_trig == trig)
1157 data->motion_trigger_on = state;
1158 else
1159 data->dready_trigger_on = state;
1160
1161 mutex_unlock(&data->mutex);
1162
1163 return 0;
1164 }
1165
1166 static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1167 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1168 .try_reenable = kxcjk1013_trig_try_reen,
1169 };
1170
kxcjk1013_report_motion_event(struct iio_dev * indio_dev)1171 static void kxcjk1013_report_motion_event(struct iio_dev *indio_dev)
1172 {
1173 struct kxcjk1013_data *data = iio_priv(indio_dev);
1174
1175 int ret = i2c_smbus_read_byte_data(data->client,
1176 KXCJK1013_REG_INT_SRC2);
1177 if (ret < 0) {
1178 dev_err(&data->client->dev, "Error reading reg_int_src2\n");
1179 return;
1180 }
1181
1182 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1183 iio_push_event(indio_dev,
1184 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1185 0,
1186 IIO_MOD_X,
1187 IIO_EV_TYPE_THRESH,
1188 IIO_EV_DIR_FALLING),
1189 data->timestamp);
1190
1191 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1192 iio_push_event(indio_dev,
1193 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1194 0,
1195 IIO_MOD_X,
1196 IIO_EV_TYPE_THRESH,
1197 IIO_EV_DIR_RISING),
1198 data->timestamp);
1199
1200 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1201 iio_push_event(indio_dev,
1202 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1203 0,
1204 IIO_MOD_Y,
1205 IIO_EV_TYPE_THRESH,
1206 IIO_EV_DIR_FALLING),
1207 data->timestamp);
1208
1209 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1210 iio_push_event(indio_dev,
1211 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1212 0,
1213 IIO_MOD_Y,
1214 IIO_EV_TYPE_THRESH,
1215 IIO_EV_DIR_RISING),
1216 data->timestamp);
1217
1218 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1219 iio_push_event(indio_dev,
1220 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1221 0,
1222 IIO_MOD_Z,
1223 IIO_EV_TYPE_THRESH,
1224 IIO_EV_DIR_FALLING),
1225 data->timestamp);
1226
1227 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1228 iio_push_event(indio_dev,
1229 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1230 0,
1231 IIO_MOD_Z,
1232 IIO_EV_TYPE_THRESH,
1233 IIO_EV_DIR_RISING),
1234 data->timestamp);
1235 }
1236
kxcjk1013_event_handler(int irq,void * private)1237 static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1238 {
1239 struct iio_dev *indio_dev = private;
1240 struct kxcjk1013_data *data = iio_priv(indio_dev);
1241 int ret;
1242
1243 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_SRC1);
1244 if (ret < 0) {
1245 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1246 goto ack_intr;
1247 }
1248
1249 if (ret & KXCJK1013_REG_INT_SRC1_BIT_WUFS) {
1250 if (data->chipset == KXTF9)
1251 iio_push_event(indio_dev,
1252 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1253 0,
1254 IIO_MOD_X_AND_Y_AND_Z,
1255 IIO_EV_TYPE_THRESH,
1256 IIO_EV_DIR_RISING),
1257 data->timestamp);
1258 else
1259 kxcjk1013_report_motion_event(indio_dev);
1260 }
1261
1262 ack_intr:
1263 if (data->dready_trigger_on)
1264 return IRQ_HANDLED;
1265
1266 ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
1267 if (ret < 0)
1268 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1269
1270 return IRQ_HANDLED;
1271 }
1272
kxcjk1013_data_rdy_trig_poll(int irq,void * private)1273 static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1274 {
1275 struct iio_dev *indio_dev = private;
1276 struct kxcjk1013_data *data = iio_priv(indio_dev);
1277
1278 data->timestamp = iio_get_time_ns(indio_dev);
1279
1280 if (data->dready_trigger_on)
1281 iio_trigger_poll(data->dready_trig);
1282 else if (data->motion_trigger_on)
1283 iio_trigger_poll(data->motion_trig);
1284
1285 if (data->ev_enable_state)
1286 return IRQ_WAKE_THREAD;
1287 else
1288 return IRQ_HANDLED;
1289 }
1290
kxcjk1013_match_acpi_device(struct device * dev,enum kx_chipset * chipset,enum kx_acpi_type * acpi_type)1291 static const char *kxcjk1013_match_acpi_device(struct device *dev,
1292 enum kx_chipset *chipset,
1293 enum kx_acpi_type *acpi_type)
1294 {
1295 const struct acpi_device_id *id;
1296
1297 id = acpi_match_device(dev->driver->acpi_match_table, dev);
1298 if (!id)
1299 return NULL;
1300
1301 if (strcmp(id->id, "SMO8500") == 0)
1302 *acpi_type = ACPI_SMO8500;
1303 else if (strcmp(id->id, "KIOX010A") == 0)
1304 *acpi_type = ACPI_KIOX010A;
1305
1306 *chipset = (enum kx_chipset)id->driver_data;
1307
1308 return dev_name(dev);
1309 }
1310
kxcjk1013_probe(struct i2c_client * client,const struct i2c_device_id * id)1311 static int kxcjk1013_probe(struct i2c_client *client,
1312 const struct i2c_device_id *id)
1313 {
1314 struct kxcjk1013_data *data;
1315 struct iio_dev *indio_dev;
1316 struct kxcjk_1013_platform_data *pdata;
1317 const char *name;
1318 int ret;
1319
1320 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
1321 if (!indio_dev)
1322 return -ENOMEM;
1323
1324 data = iio_priv(indio_dev);
1325 i2c_set_clientdata(client, indio_dev);
1326 data->client = client;
1327
1328 pdata = dev_get_platdata(&client->dev);
1329 if (pdata) {
1330 data->active_high_intr = pdata->active_high_intr;
1331 data->orientation = pdata->orientation;
1332 } else {
1333 data->active_high_intr = true; /* default polarity */
1334
1335 ret = iio_read_mount_matrix(&client->dev, "mount-matrix",
1336 &data->orientation);
1337 if (ret)
1338 return ret;
1339 }
1340
1341 if (id) {
1342 data->chipset = (enum kx_chipset)(id->driver_data);
1343 name = id->name;
1344 } else if (ACPI_HANDLE(&client->dev)) {
1345 name = kxcjk1013_match_acpi_device(&client->dev,
1346 &data->chipset,
1347 &data->acpi_type);
1348 } else
1349 return -ENODEV;
1350
1351 ret = kxcjk1013_chip_init(data);
1352 if (ret < 0)
1353 return ret;
1354
1355 mutex_init(&data->mutex);
1356
1357 indio_dev->channels = kxcjk1013_channels;
1358 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1359 indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1360 indio_dev->name = name;
1361 indio_dev->modes = INDIO_DIRECT_MODE;
1362 indio_dev->info = &kxcjk1013_info;
1363
1364 if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
1365 ret = devm_request_threaded_irq(&client->dev, client->irq,
1366 kxcjk1013_data_rdy_trig_poll,
1367 kxcjk1013_event_handler,
1368 IRQF_TRIGGER_RISING,
1369 KXCJK1013_IRQ_NAME,
1370 indio_dev);
1371 if (ret)
1372 goto err_poweroff;
1373
1374 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1375 "%s-dev%d",
1376 indio_dev->name,
1377 indio_dev->id);
1378 if (!data->dready_trig) {
1379 ret = -ENOMEM;
1380 goto err_poweroff;
1381 }
1382
1383 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1384 "%s-any-motion-dev%d",
1385 indio_dev->name,
1386 indio_dev->id);
1387 if (!data->motion_trig) {
1388 ret = -ENOMEM;
1389 goto err_poweroff;
1390 }
1391
1392 data->dready_trig->dev.parent = &client->dev;
1393 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1394 iio_trigger_set_drvdata(data->dready_trig, indio_dev);
1395 indio_dev->trig = data->dready_trig;
1396 iio_trigger_get(indio_dev->trig);
1397 ret = iio_trigger_register(data->dready_trig);
1398 if (ret)
1399 goto err_poweroff;
1400
1401 data->motion_trig->dev.parent = &client->dev;
1402 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1403 iio_trigger_set_drvdata(data->motion_trig, indio_dev);
1404 ret = iio_trigger_register(data->motion_trig);
1405 if (ret) {
1406 data->motion_trig = NULL;
1407 goto err_trigger_unregister;
1408 }
1409 }
1410
1411 ret = iio_triggered_buffer_setup(indio_dev,
1412 &iio_pollfunc_store_time,
1413 kxcjk1013_trigger_handler,
1414 &kxcjk1013_buffer_setup_ops);
1415 if (ret < 0) {
1416 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1417 goto err_trigger_unregister;
1418 }
1419
1420 ret = pm_runtime_set_active(&client->dev);
1421 if (ret)
1422 goto err_buffer_cleanup;
1423
1424 pm_runtime_enable(&client->dev);
1425 pm_runtime_set_autosuspend_delay(&client->dev,
1426 KXCJK1013_SLEEP_DELAY_MS);
1427 pm_runtime_use_autosuspend(&client->dev);
1428
1429 ret = iio_device_register(indio_dev);
1430 if (ret < 0) {
1431 dev_err(&client->dev, "unable to register iio device\n");
1432 goto err_buffer_cleanup;
1433 }
1434
1435 return 0;
1436
1437 err_buffer_cleanup:
1438 iio_triggered_buffer_cleanup(indio_dev);
1439 err_trigger_unregister:
1440 if (data->dready_trig)
1441 iio_trigger_unregister(data->dready_trig);
1442 if (data->motion_trig)
1443 iio_trigger_unregister(data->motion_trig);
1444 err_poweroff:
1445 kxcjk1013_set_mode(data, STANDBY);
1446
1447 return ret;
1448 }
1449
kxcjk1013_remove(struct i2c_client * client)1450 static int kxcjk1013_remove(struct i2c_client *client)
1451 {
1452 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1453 struct kxcjk1013_data *data = iio_priv(indio_dev);
1454
1455 iio_device_unregister(indio_dev);
1456
1457 pm_runtime_disable(&client->dev);
1458 pm_runtime_set_suspended(&client->dev);
1459 pm_runtime_put_noidle(&client->dev);
1460
1461 iio_triggered_buffer_cleanup(indio_dev);
1462 if (data->dready_trig) {
1463 iio_trigger_unregister(data->dready_trig);
1464 iio_trigger_unregister(data->motion_trig);
1465 }
1466
1467 mutex_lock(&data->mutex);
1468 kxcjk1013_set_mode(data, STANDBY);
1469 mutex_unlock(&data->mutex);
1470
1471 return 0;
1472 }
1473
1474 #ifdef CONFIG_PM_SLEEP
kxcjk1013_suspend(struct device * dev)1475 static int kxcjk1013_suspend(struct device *dev)
1476 {
1477 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1478 struct kxcjk1013_data *data = iio_priv(indio_dev);
1479 int ret;
1480
1481 mutex_lock(&data->mutex);
1482 ret = kxcjk1013_set_mode(data, STANDBY);
1483 mutex_unlock(&data->mutex);
1484
1485 return ret;
1486 }
1487
kxcjk1013_resume(struct device * dev)1488 static int kxcjk1013_resume(struct device *dev)
1489 {
1490 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1491 struct kxcjk1013_data *data = iio_priv(indio_dev);
1492 int ret = 0;
1493
1494 mutex_lock(&data->mutex);
1495 ret = kxcjk1013_set_mode(data, OPERATION);
1496 if (ret == 0)
1497 ret = kxcjk1013_set_range(data, data->range);
1498 mutex_unlock(&data->mutex);
1499
1500 return ret;
1501 }
1502 #endif
1503
1504 #ifdef CONFIG_PM
kxcjk1013_runtime_suspend(struct device * dev)1505 static int kxcjk1013_runtime_suspend(struct device *dev)
1506 {
1507 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1508 struct kxcjk1013_data *data = iio_priv(indio_dev);
1509 int ret;
1510
1511 ret = kxcjk1013_set_mode(data, STANDBY);
1512 if (ret < 0) {
1513 dev_err(&data->client->dev, "powering off device failed\n");
1514 return -EAGAIN;
1515 }
1516 return 0;
1517 }
1518
kxcjk1013_runtime_resume(struct device * dev)1519 static int kxcjk1013_runtime_resume(struct device *dev)
1520 {
1521 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1522 struct kxcjk1013_data *data = iio_priv(indio_dev);
1523 int ret;
1524 int sleep_val;
1525
1526 ret = kxcjk1013_set_mode(data, OPERATION);
1527 if (ret < 0)
1528 return ret;
1529
1530 sleep_val = kxcjk1013_get_startup_times(data);
1531 if (sleep_val < 20000)
1532 usleep_range(sleep_val, 20000);
1533 else
1534 msleep_interruptible(sleep_val/1000);
1535
1536 return 0;
1537 }
1538 #endif
1539
1540 static const struct dev_pm_ops kxcjk1013_pm_ops = {
1541 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1542 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1543 kxcjk1013_runtime_resume, NULL)
1544 };
1545
1546 static const struct acpi_device_id kx_acpi_match[] = {
1547 {"KXCJ1013", KXCJK1013},
1548 {"KXCJ1008", KXCJ91008},
1549 {"KXCJ9000", KXCJ91008},
1550 {"KIOX0008", KXCJ91008},
1551 {"KIOX0009", KXTJ21009},
1552 {"KIOX000A", KXCJ91008},
1553 {"KIOX010A", KXCJ91008}, /* KXCJ91008 in the display of a yoga 2-in-1 */
1554 {"KIOX020A", KXCJ91008}, /* KXCJ91008 in the base of a yoga 2-in-1 */
1555 {"KXTJ1009", KXTJ21009},
1556 {"KXJ2109", KXTJ21009},
1557 {"SMO8500", KXCJ91008},
1558 { },
1559 };
1560 MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
1561
1562 static const struct i2c_device_id kxcjk1013_id[] = {
1563 {"kxcjk1013", KXCJK1013},
1564 {"kxcj91008", KXCJ91008},
1565 {"kxtj21009", KXTJ21009},
1566 {"kxtf9", KXTF9},
1567 {"SMO8500", KXCJ91008},
1568 {}
1569 };
1570
1571 MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1572
1573 static const struct of_device_id kxcjk1013_of_match[] = {
1574 { .compatible = "kionix,kxcjk1013", },
1575 { .compatible = "kionix,kxcj91008", },
1576 { .compatible = "kionix,kxtj21009", },
1577 { .compatible = "kionix,kxtf9", },
1578 { }
1579 };
1580 MODULE_DEVICE_TABLE(of, kxcjk1013_of_match);
1581
1582 static struct i2c_driver kxcjk1013_driver = {
1583 .driver = {
1584 .name = KXCJK1013_DRV_NAME,
1585 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1586 .of_match_table = kxcjk1013_of_match,
1587 .pm = &kxcjk1013_pm_ops,
1588 },
1589 .probe = kxcjk1013_probe,
1590 .remove = kxcjk1013_remove,
1591 .id_table = kxcjk1013_id,
1592 };
1593 module_i2c_driver(kxcjk1013_driver);
1594
1595 MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1596 MODULE_LICENSE("GPL v2");
1597 MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
1598