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/regulator/consumer.h>
18#include <linux/iio/iio.h>
19#include <linux/iio/sysfs.h>
20#include <linux/iio/buffer.h>
21#include <linux/iio/trigger.h>
22#include <linux/iio/events.h>
23#include <linux/iio/trigger_consumer.h>
24#include <linux/iio/triggered_buffer.h>
25#include <linux/iio/accel/kxcjk_1013.h>
26
27#define KXCJK1013_DRV_NAME "kxcjk1013"
28#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
29
30#define KXTF9_REG_HP_XOUT_L 0x00
31#define KXTF9_REG_HP_XOUT_H 0x01
32#define KXTF9_REG_HP_YOUT_L 0x02
33#define KXTF9_REG_HP_YOUT_H 0x03
34#define KXTF9_REG_HP_ZOUT_L 0x04
35#define KXTF9_REG_HP_ZOUT_H 0x05
36
37#define KXCJK1013_REG_XOUT_L 0x06
38/*
39 * From low byte X axis register, all the other addresses of Y and Z can be
40 * obtained by just applying axis offset. The following axis defines are just
41 * provide clarity, but not used.
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 KXTF9_REG_TILT_POS_CUR 0x10
52#define KXTF9_REG_TILT_POS_PREV 0x11
53#define KXTF9_REG_INT_SRC1 0x15
54#define KXTF9_REG_INT_SRC2 0x16
55#define KXCJK1013_REG_INT_SRC1 0x16
56#define KXCJK1013_REG_INT_SRC2 0x17
57#define KXCJK1013_REG_STATUS_REG 0x18
58#define KXCJK1013_REG_INT_REL 0x1A
59#define KXCJK1013_REG_CTRL1 0x1B
60#define KXTF9_REG_CTRL2 0x1C
61#define KXTF9_REG_CTRL3 0x1D
62#define KXCJK1013_REG_CTRL2 0x1D
63#define KXCJK1013_REG_INT_CTRL1 0x1E
64#define KXCJK1013_REG_INT_CTRL2 0x1F
65#define KXTF9_REG_INT_CTRL3 0x20
66#define KXCJK1013_REG_DATA_CTRL 0x21
67#define KXTF9_REG_TILT_TIMER 0x28
68#define KXCJK1013_REG_WAKE_TIMER 0x29
69#define KXTF9_REG_TDT_TIMER 0x2B
70#define KXTF9_REG_TDT_THRESH_H 0x2C
71#define KXTF9_REG_TDT_THRESH_L 0x2D
72#define KXTF9_REG_TDT_TAP_TIMER 0x2E
73#define KXTF9_REG_TDT_TOTAL_TIMER 0x2F
74#define KXTF9_REG_TDT_LATENCY_TIMER 0x30
75#define KXTF9_REG_TDT_WINDOW_TIMER 0x31
76#define KXCJK1013_REG_SELF_TEST 0x3A
77#define KXTF9_REG_WAKE_THRESH 0x5A
78#define KXTF9_REG_TILT_ANGLE 0x5C
79#define KXTF9_REG_HYST_SET 0x5F
80#define KXCJK1013_REG_WAKE_THRES 0x6A
81
82/* Everything up to 0x11 is equal to KXCJK1013/KXTF9 above */
83#define KX023_REG_INS1 0x12
84#define KX023_REG_INS2 0x13
85#define KX023_REG_INS3 0x14
86#define KX023_REG_STAT 0x15
87#define KX023_REG_INT_REL 0x17
88#define KX023_REG_CNTL1 0x18
89#define KX023_REG_CNTL2 0x19
90#define KX023_REG_CNTL3 0x1A
91#define KX023_REG_ODCNTL 0x1B
92#define KX023_REG_INC1 0x1C
93#define KX023_REG_INC2 0x1D
94#define KX023_REG_INC3 0x1E
95#define KX023_REG_INC4 0x1F
96#define KX023_REG_INC5 0x20
97#define KX023_REG_INC6 0x21
98#define KX023_REG_TILT_TIMER 0x22
99#define KX023_REG_WUFC 0x23
100#define KX023_REG_TDTRC 0x24
101#define KX023_REG_TDTC 0x25
102#define KX023_REG_TTH 0x26
103#define KX023_REG_TTL 0x27
104#define KX023_REG_FTD 0x28
105#define KX023_REG_STD 0x29
106#define KX023_REG_TLT 0x2A
107#define KX023_REG_TWS 0x2B
108#define KX023_REG_ATH 0x30
109#define KX023_REG_TILT_ANGLE_LL 0x32
110#define KX023_REG_TILT_ANGLE_HL 0x33
111#define KX023_REG_HYST_SET 0x34
112#define KX023_REG_LP_CNTL 0x35
113#define KX023_REG_BUF_CNTL1 0x3A
114#define KX023_REG_BUF_CNTL2 0x3B
115#define KX023_REG_BUF_STATUS_1 0x3C
116#define KX023_REG_BUF_STATUS_2 0x3D
117#define KX023_REG_BUF_CLEAR 0x3E
118#define KX023_REG_BUF_READ 0x3F
119#define KX023_REG_SELF_TEST 0x60
120
121#define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
122#define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
123#define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
124#define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
125#define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
126#define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
127
128#define KXCJK1013_REG_INT_CTRL1_BIT_IEU BIT(2) /* KXTF9 */
129#define KXCJK1013_REG_INT_CTRL1_BIT_IEL BIT(3)
130#define KXCJK1013_REG_INT_CTRL1_BIT_IEA BIT(4)
131#define KXCJK1013_REG_INT_CTRL1_BIT_IEN BIT(5)
132
133#define KXTF9_REG_TILT_BIT_LEFT_EDGE BIT(5)
134#define KXTF9_REG_TILT_BIT_RIGHT_EDGE BIT(4)
135#define KXTF9_REG_TILT_BIT_LOWER_EDGE BIT(3)
136#define KXTF9_REG_TILT_BIT_UPPER_EDGE BIT(2)
137#define KXTF9_REG_TILT_BIT_FACE_DOWN BIT(1)
138#define KXTF9_REG_TILT_BIT_FACE_UP BIT(0)
139
140#define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
141#define KXCJK1013_MAX_STARTUP_TIME_US 100000
142
143#define KXCJK1013_SLEEP_DELAY_MS 2000
144
145#define KXCJK1013_REG_INT_SRC1_BIT_TPS BIT(0) /* KXTF9 */
146#define KXCJK1013_REG_INT_SRC1_BIT_WUFS BIT(1)
147#define KXCJK1013_REG_INT_SRC1_MASK_TDTS (BIT(2) | BIT(3)) /* KXTF9 */
148#define KXCJK1013_REG_INT_SRC1_TAP_NONE 0
149#define KXCJK1013_REG_INT_SRC1_TAP_SINGLE BIT(2)
150#define KXCJK1013_REG_INT_SRC1_TAP_DOUBLE BIT(3)
151#define KXCJK1013_REG_INT_SRC1_BIT_DRDY BIT(4)
152
153/* KXCJK: INT_SOURCE2: motion detect, KXTF9: INT_SRC_REG1: tap detect */
154#define KXCJK1013_REG_INT_SRC2_BIT_ZP BIT(0)
155#define KXCJK1013_REG_INT_SRC2_BIT_ZN BIT(1)
156#define KXCJK1013_REG_INT_SRC2_BIT_YP BIT(2)
157#define KXCJK1013_REG_INT_SRC2_BIT_YN BIT(3)
158#define KXCJK1013_REG_INT_SRC2_BIT_XP BIT(4)
159#define KXCJK1013_REG_INT_SRC2_BIT_XN BIT(5)
160
161/* KX023 interrupt routing to INT1. INT2 can be configured with INC6 */
162#define KX023_REG_INC4_BFI1 BIT(6)
163#define KX023_REG_INC4_WMI1 BIT(5)
164#define KX023_REG_INC4_DRDY1 BIT(4)
165#define KX023_REG_INC4_TDTI1 BIT(2)
166#define KX023_REG_INC4_WUFI1 BIT(1)
167#define KX023_REG_INC4_TPI1 BIT(0)
168
169#define KXCJK1013_DEFAULT_WAKE_THRES 1
170
171enum kx_chipset {
172 KXCJK1013,
173 KXCJ91008,
174 KXTJ21009,
175 KXTF9,
176 KX0231025,
177 KX_MAX_CHIPS /* this must be last */
178};
179
180enum kx_acpi_type {
181 ACPI_GENERIC,
182 ACPI_SMO8500,
183 ACPI_KIOX010A,
184};
185
186struct kx_chipset_regs {
187 u8 int_src1;
188 u8 int_src2;
189 u8 int_rel;
190 u8 ctrl1;
191 u8 wuf_ctrl;
192 u8 int_ctrl1;
193 u8 data_ctrl;
194 u8 wake_timer;
195 u8 wake_thres;
196};
197
198static const struct kx_chipset_regs kxcjk1013_regs = {
199 .int_src1 = KXCJK1013_REG_INT_SRC1,
200 .int_src2 = KXCJK1013_REG_INT_SRC2,
201 .int_rel = KXCJK1013_REG_INT_REL,
202 .ctrl1 = KXCJK1013_REG_CTRL1,
203 .wuf_ctrl = KXCJK1013_REG_CTRL2,
204 .int_ctrl1 = KXCJK1013_REG_INT_CTRL1,
205 .data_ctrl = KXCJK1013_REG_DATA_CTRL,
206 .wake_timer = KXCJK1013_REG_WAKE_TIMER,
207 .wake_thres = KXCJK1013_REG_WAKE_THRES,
208};
209
210static const struct kx_chipset_regs kxtf9_regs = {
211 /* .int_src1 was moved to INT_SRC2 on KXTF9 */
212 .int_src1 = KXTF9_REG_INT_SRC2,
213 /* .int_src2 is not available */
214 .int_rel = KXCJK1013_REG_INT_REL,
215 .ctrl1 = KXCJK1013_REG_CTRL1,
216 .wuf_ctrl = KXTF9_REG_CTRL3,
217 .int_ctrl1 = KXCJK1013_REG_INT_CTRL1,
218 .data_ctrl = KXCJK1013_REG_DATA_CTRL,
219 .wake_timer = KXCJK1013_REG_WAKE_TIMER,
220 .wake_thres = KXTF9_REG_WAKE_THRESH,
221};
222
223/* The registers have totally different names but the bits are compatible */
224static const struct kx_chipset_regs kx0231025_regs = {
225 .int_src1 = KX023_REG_INS2,
226 .int_src2 = KX023_REG_INS3,
227 .int_rel = KX023_REG_INT_REL,
228 .ctrl1 = KX023_REG_CNTL1,
229 .wuf_ctrl = KX023_REG_CNTL3,
230 .int_ctrl1 = KX023_REG_INC1,
231 .data_ctrl = KX023_REG_ODCNTL,
232 .wake_timer = KX023_REG_WUFC,
233 .wake_thres = KX023_REG_ATH,
234};
235
236enum kxcjk1013_axis {
237 AXIS_X,
238 AXIS_Y,
239 AXIS_Z,
240 AXIS_MAX
241};
242
243struct kxcjk1013_data {
244 struct i2c_client *client;
245 struct iio_trigger *dready_trig;
246 struct iio_trigger *motion_trig;
247 struct iio_mount_matrix orientation;
248 struct mutex mutex;
249 /* Ensure timestamp naturally aligned */
250 struct {
251 s16 chans[AXIS_MAX];
252 s64 timestamp __aligned(8);
253 } scan;
254 u8 odr_bits;
255 u8 range;
256 int wake_thres;
257 int wake_dur;
258 bool active_high_intr;
259 bool dready_trigger_on;
260 int ev_enable_state;
261 bool motion_trigger_on;
262 int64_t timestamp;
263 enum kx_chipset chipset;
264 enum kx_acpi_type acpi_type;
265 const struct kx_chipset_regs *regs;
266};
267
268enum kxcjk1013_mode {
269 STANDBY,
270 OPERATION,
271};
272
273enum kxcjk1013_range {
274 KXCJK1013_RANGE_2G,
275 KXCJK1013_RANGE_4G,
276 KXCJK1013_RANGE_8G,
277};
278
279struct kx_odr_map {
280 int val;
281 int val2;
282 int odr_bits;
283 int wuf_bits;
284};
285
286static const struct kx_odr_map samp_freq_table[] = {
287 { 0, 781000, 0x08, 0x00 },
288 { 1, 563000, 0x09, 0x01 },
289 { 3, 125000, 0x0A, 0x02 },
290 { 6, 250000, 0x0B, 0x03 },
291 { 12, 500000, 0x00, 0x04 },
292 { 25, 0, 0x01, 0x05 },
293 { 50, 0, 0x02, 0x06 },
294 { 100, 0, 0x03, 0x06 },
295 { 200, 0, 0x04, 0x06 },
296 { 400, 0, 0x05, 0x06 },
297 { 800, 0, 0x06, 0x06 },
298 { 1600, 0, 0x07, 0x06 },
299};
300
301static const char *const kxcjk1013_samp_freq_avail =
302 "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600";
303
304static const struct kx_odr_map kxtf9_samp_freq_table[] = {
305 { 25, 0, 0x01, 0x00 },
306 { 50, 0, 0x02, 0x01 },
307 { 100, 0, 0x03, 0x01 },
308 { 200, 0, 0x04, 0x01 },
309 { 400, 0, 0x05, 0x01 },
310 { 800, 0, 0x06, 0x01 },
311};
312
313static const char *const kxtf9_samp_freq_avail =
314 "25 50 100 200 400 800";
315
316/* Refer to section 4 of the specification */
317static __maybe_unused const struct {
318 int odr_bits;
319 int usec;
320} odr_start_up_times[KX_MAX_CHIPS][12] = {
321 /* KXCJK-1013 */
322 {
323 {0x08, 100000},
324 {0x09, 100000},
325 {0x0A, 100000},
326 {0x0B, 100000},
327 {0, 80000},
328 {0x01, 41000},
329 {0x02, 21000},
330 {0x03, 11000},
331 {0x04, 6400},
332 {0x05, 3900},
333 {0x06, 2700},
334 {0x07, 2100},
335 },
336 /* KXCJ9-1008 */
337 {
338 {0x08, 100000},
339 {0x09, 100000},
340 {0x0A, 100000},
341 {0x0B, 100000},
342 {0, 80000},
343 {0x01, 41000},
344 {0x02, 21000},
345 {0x03, 11000},
346 {0x04, 6400},
347 {0x05, 3900},
348 {0x06, 2700},
349 {0x07, 2100},
350 },
351 /* KXCTJ2-1009 */
352 {
353 {0x08, 1240000},
354 {0x09, 621000},
355 {0x0A, 309000},
356 {0x0B, 151000},
357 {0, 80000},
358 {0x01, 41000},
359 {0x02, 21000},
360 {0x03, 11000},
361 {0x04, 6000},
362 {0x05, 4000},
363 {0x06, 3000},
364 {0x07, 2000},
365 },
366 /* KXTF9 */
367 {
368 {0x01, 81000},
369 {0x02, 41000},
370 {0x03, 21000},
371 {0x04, 11000},
372 {0x05, 5100},
373 {0x06, 2700},
374 },
375 /* KX023-1025 */
376 {
377 /* First 4 are not in datasheet, taken from KXCTJ2-1009 */
378 {0x08, 1240000},
379 {0x09, 621000},
380 {0x0A, 309000},
381 {0x0B, 151000},
382 {0, 81000},
383 {0x01, 40000},
384 {0x02, 22000},
385 {0x03, 12000},
386 {0x04, 7000},
387 {0x05, 4400},
388 {0x06, 3000},
389 {0x07, 3000},
390 },
391};
392
393static const struct {
394 u16 scale;
395 u8 gsel_0;
396 u8 gsel_1;
397} KXCJK1013_scale_table[] = { {9582, 0, 0},
398 {19163, 1, 0},
399 {38326, 0, 1} };
400
401#ifdef CONFIG_ACPI
402enum kiox010a_fn_index {
403 KIOX010A_SET_LAPTOP_MODE = 1,
404 KIOX010A_SET_TABLET_MODE = 2,
405};
406
407static int kiox010a_dsm(struct device *dev, int fn_index)
408{
409 acpi_handle handle = ACPI_HANDLE(dev);
410 guid_t kiox010a_dsm_guid;
411 union acpi_object *obj;
412
413 if (!handle)
414 return -ENODEV;
415
416 guid_parse(uuid: "1f339696-d475-4e26-8cad-2e9f8e6d7a91", u: &kiox010a_dsm_guid);
417
418 obj = acpi_evaluate_dsm(handle, guid: &kiox010a_dsm_guid, rev: 1, func: fn_index, NULL);
419 if (!obj)
420 return -EIO;
421
422 ACPI_FREE(obj);
423 return 0;
424}
425
426static const struct acpi_device_id kx_acpi_match[] = {
427 {"KXCJ1013", KXCJK1013},
428 {"KXCJ1008", KXCJ91008},
429 {"KXCJ9000", KXCJ91008},
430 {"KIOX0008", KXCJ91008},
431 {"KIOX0009", KXTJ21009},
432 {"KIOX000A", KXCJ91008},
433 {"KIOX010A", KXCJ91008}, /* KXCJ91008 in the display of a yoga 2-in-1 */
434 {"KIOX020A", KXCJ91008}, /* KXCJ91008 in the base of a yoga 2-in-1 */
435 {"KXTJ1009", KXTJ21009},
436 {"KXJ2109", KXTJ21009},
437 {"SMO8500", KXCJ91008},
438 { }
439};
440MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
441
442#endif
443
444static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
445 enum kxcjk1013_mode mode)
446{
447 int ret;
448
449 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->ctrl1);
450 if (ret < 0) {
451 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
452 return ret;
453 }
454
455 if (mode == STANDBY)
456 ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
457 else
458 ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
459
460 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->ctrl1, value: ret);
461 if (ret < 0) {
462 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
463 return ret;
464 }
465
466 return 0;
467}
468
469static int kxcjk1013_get_mode(struct kxcjk1013_data *data,
470 enum kxcjk1013_mode *mode)
471{
472 int ret;
473
474 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->ctrl1);
475 if (ret < 0) {
476 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
477 return ret;
478 }
479
480 if (ret & KXCJK1013_REG_CTRL1_BIT_PC1)
481 *mode = OPERATION;
482 else
483 *mode = STANDBY;
484
485 return 0;
486}
487
488static int kxcjk1013_set_range(struct kxcjk1013_data *data, int range_index)
489{
490 int ret;
491
492 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->ctrl1);
493 if (ret < 0) {
494 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
495 return ret;
496 }
497
498 ret &= ~(KXCJK1013_REG_CTRL1_BIT_GSEL0 |
499 KXCJK1013_REG_CTRL1_BIT_GSEL1);
500 ret |= (KXCJK1013_scale_table[range_index].gsel_0 << 3);
501 ret |= (KXCJK1013_scale_table[range_index].gsel_1 << 4);
502
503 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->ctrl1, value: ret);
504 if (ret < 0) {
505 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
506 return ret;
507 }
508
509 data->range = range_index;
510
511 return 0;
512}
513
514static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
515{
516 int ret;
517
518#ifdef CONFIG_ACPI
519 if (data->acpi_type == ACPI_KIOX010A) {
520 /* Make sure the kbd and touchpad on 2-in-1s using 2 KXCJ91008-s work */
521 kiox010a_dsm(dev: &data->client->dev, fn_index: KIOX010A_SET_LAPTOP_MODE);
522 }
523#endif
524
525 ret = i2c_smbus_read_byte_data(client: data->client, KXCJK1013_REG_WHO_AM_I);
526 if (ret < 0) {
527 dev_err(&data->client->dev, "Error reading who_am_i\n");
528 return ret;
529 }
530
531 dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
532
533 ret = kxcjk1013_set_mode(data, mode: STANDBY);
534 if (ret < 0)
535 return ret;
536
537 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->ctrl1);
538 if (ret < 0) {
539 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
540 return ret;
541 }
542
543 /* Set 12 bit mode */
544 ret |= KXCJK1013_REG_CTRL1_BIT_RES;
545
546 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->ctrl1, value: ret);
547 if (ret < 0) {
548 dev_err(&data->client->dev, "Error reading reg_ctrl\n");
549 return ret;
550 }
551
552 /* Setting range to 4G */
553 ret = kxcjk1013_set_range(data, range_index: KXCJK1013_RANGE_4G);
554 if (ret < 0)
555 return ret;
556
557 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->data_ctrl);
558 if (ret < 0) {
559 dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
560 return ret;
561 }
562
563 data->odr_bits = ret;
564
565 /* Set up INT polarity */
566 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_ctrl1);
567 if (ret < 0) {
568 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
569 return ret;
570 }
571
572 if (data->active_high_intr)
573 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEA;
574 else
575 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEA;
576
577 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->int_ctrl1, value: ret);
578 if (ret < 0) {
579 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
580 return ret;
581 }
582
583 /* On KX023, route all used interrupts to INT1 for now */
584 if (data->chipset == KX0231025 && data->client->irq > 0) {
585 ret = i2c_smbus_write_byte_data(client: data->client, KX023_REG_INC4,
586 KX023_REG_INC4_DRDY1 |
587 KX023_REG_INC4_WUFI1);
588 if (ret < 0) {
589 dev_err(&data->client->dev, "Error writing reg_inc4\n");
590 return ret;
591 }
592 }
593
594 ret = kxcjk1013_set_mode(data, mode: OPERATION);
595 if (ret < 0)
596 return ret;
597
598 data->wake_thres = KXCJK1013_DEFAULT_WAKE_THRES;
599
600 return 0;
601}
602
603#ifdef CONFIG_PM
604static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
605{
606 int i;
607 int idx = data->chipset;
608
609 for (i = 0; i < ARRAY_SIZE(odr_start_up_times[idx]); ++i) {
610 if (odr_start_up_times[idx][i].odr_bits == data->odr_bits)
611 return odr_start_up_times[idx][i].usec;
612 }
613
614 return KXCJK1013_MAX_STARTUP_TIME_US;
615}
616#endif
617
618static int kxcjk1013_set_power_state(struct kxcjk1013_data *data, bool on)
619{
620#ifdef CONFIG_PM
621 int ret;
622
623 if (on)
624 ret = pm_runtime_resume_and_get(dev: &data->client->dev);
625 else {
626 pm_runtime_mark_last_busy(dev: &data->client->dev);
627 ret = pm_runtime_put_autosuspend(dev: &data->client->dev);
628 }
629 if (ret < 0) {
630 dev_err(&data->client->dev,
631 "Failed: %s for %d\n", __func__, on);
632 return ret;
633 }
634#endif
635
636 return 0;
637}
638
639#ifdef CONFIG_ACPI
640static bool kxj_acpi_orientation(struct device *dev,
641 struct iio_mount_matrix *orientation)
642{
643 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
644 struct acpi_device *adev = ACPI_COMPANION(dev);
645 char *str;
646 union acpi_object *obj, *elements;
647 acpi_status status;
648 int i, j, val[3];
649 bool ret = false;
650
651 if (!acpi_has_method(handle: adev->handle, name: "ROTM"))
652 return false;
653
654 status = acpi_evaluate_object(object: adev->handle, pathname: "ROTM", NULL, return_object_buffer: &buffer);
655 if (ACPI_FAILURE(status)) {
656 dev_err(dev, "Failed to get ACPI mount matrix: %d\n", status);
657 return false;
658 }
659
660 obj = buffer.pointer;
661 if (obj->type != ACPI_TYPE_PACKAGE || obj->package.count != 3) {
662 dev_err(dev, "Unknown ACPI mount matrix package format\n");
663 goto out_free_buffer;
664 }
665
666 elements = obj->package.elements;
667 for (i = 0; i < 3; i++) {
668 if (elements[i].type != ACPI_TYPE_STRING) {
669 dev_err(dev, "Unknown ACPI mount matrix element format\n");
670 goto out_free_buffer;
671 }
672
673 str = elements[i].string.pointer;
674 if (sscanf(str, "%d %d %d", &val[0], &val[1], &val[2]) != 3) {
675 dev_err(dev, "Incorrect ACPI mount matrix string format\n");
676 goto out_free_buffer;
677 }
678
679 for (j = 0; j < 3; j++) {
680 switch (val[j]) {
681 case -1: str = "-1"; break;
682 case 0: str = "0"; break;
683 case 1: str = "1"; break;
684 default:
685 dev_err(dev, "Invalid value in ACPI mount matrix: %d\n", val[j]);
686 goto out_free_buffer;
687 }
688 orientation->rotation[i * 3 + j] = str;
689 }
690 }
691
692 ret = true;
693
694out_free_buffer:
695 kfree(objp: buffer.pointer);
696 return ret;
697}
698
699static bool kxj1009_apply_acpi_orientation(struct device *dev,
700 struct iio_mount_matrix *orientation)
701{
702 struct acpi_device *adev = ACPI_COMPANION(dev);
703
704 if (adev && acpi_dev_hid_uid_match(adev, "KIOX000A", NULL))
705 return kxj_acpi_orientation(dev, orientation);
706
707 return false;
708}
709#else
710static bool kxj1009_apply_acpi_orientation(struct device *dev,
711 struct iio_mount_matrix *orientation)
712{
713 return false;
714}
715#endif
716
717static int kxcjk1013_chip_update_thresholds(struct kxcjk1013_data *data)
718{
719 int ret;
720
721 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->wake_timer,
722 value: data->wake_dur);
723 if (ret < 0) {
724 dev_err(&data->client->dev,
725 "Error writing reg_wake_timer\n");
726 return ret;
727 }
728
729 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->wake_thres,
730 value: data->wake_thres);
731 if (ret < 0) {
732 dev_err(&data->client->dev, "Error writing reg_wake_thres\n");
733 return ret;
734 }
735
736 return 0;
737}
738
739static int kxcjk1013_setup_any_motion_interrupt(struct kxcjk1013_data *data,
740 bool status)
741{
742 int ret;
743 enum kxcjk1013_mode store_mode;
744
745 ret = kxcjk1013_get_mode(data, mode: &store_mode);
746 if (ret < 0)
747 return ret;
748
749 /* This is requirement by spec to change state to STANDBY */
750 ret = kxcjk1013_set_mode(data, mode: STANDBY);
751 if (ret < 0)
752 return ret;
753
754 ret = kxcjk1013_chip_update_thresholds(data);
755 if (ret < 0)
756 return ret;
757
758 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_ctrl1);
759 if (ret < 0) {
760 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
761 return ret;
762 }
763
764 if (status)
765 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
766 else
767 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
768
769 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->int_ctrl1, value: ret);
770 if (ret < 0) {
771 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
772 return ret;
773 }
774
775 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->ctrl1);
776 if (ret < 0) {
777 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
778 return ret;
779 }
780
781 if (status)
782 ret |= KXCJK1013_REG_CTRL1_BIT_WUFE;
783 else
784 ret &= ~KXCJK1013_REG_CTRL1_BIT_WUFE;
785
786 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->ctrl1, value: ret);
787 if (ret < 0) {
788 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
789 return ret;
790 }
791
792 if (store_mode == OPERATION) {
793 ret = kxcjk1013_set_mode(data, mode: OPERATION);
794 if (ret < 0)
795 return ret;
796 }
797
798 return 0;
799}
800
801static int kxcjk1013_setup_new_data_interrupt(struct kxcjk1013_data *data,
802 bool status)
803{
804 int ret;
805 enum kxcjk1013_mode store_mode;
806
807 ret = kxcjk1013_get_mode(data, mode: &store_mode);
808 if (ret < 0)
809 return ret;
810
811 /* This is requirement by spec to change state to STANDBY */
812 ret = kxcjk1013_set_mode(data, mode: STANDBY);
813 if (ret < 0)
814 return ret;
815
816 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_ctrl1);
817 if (ret < 0) {
818 dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
819 return ret;
820 }
821
822 if (status)
823 ret |= KXCJK1013_REG_INT_CTRL1_BIT_IEN;
824 else
825 ret &= ~KXCJK1013_REG_INT_CTRL1_BIT_IEN;
826
827 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->int_ctrl1, value: ret);
828 if (ret < 0) {
829 dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
830 return ret;
831 }
832
833 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->ctrl1);
834 if (ret < 0) {
835 dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
836 return ret;
837 }
838
839 if (status)
840 ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
841 else
842 ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
843
844 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->ctrl1, value: ret);
845 if (ret < 0) {
846 dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
847 return ret;
848 }
849
850 if (store_mode == OPERATION) {
851 ret = kxcjk1013_set_mode(data, mode: OPERATION);
852 if (ret < 0)
853 return ret;
854 }
855
856 return 0;
857}
858
859static const struct kx_odr_map *kxcjk1013_find_odr_value(
860 const struct kx_odr_map *map, size_t map_size, int val, int val2)
861{
862 int i;
863
864 for (i = 0; i < map_size; ++i) {
865 if (map[i].val == val && map[i].val2 == val2)
866 return &map[i];
867 }
868
869 return ERR_PTR(error: -EINVAL);
870}
871
872static int kxcjk1013_convert_odr_value(const struct kx_odr_map *map,
873 size_t map_size, int odr_bits,
874 int *val, int *val2)
875{
876 int i;
877
878 for (i = 0; i < map_size; ++i) {
879 if (map[i].odr_bits == odr_bits) {
880 *val = map[i].val;
881 *val2 = map[i].val2;
882 return IIO_VAL_INT_PLUS_MICRO;
883 }
884 }
885
886 return -EINVAL;
887}
888
889static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
890{
891 int ret;
892 enum kxcjk1013_mode store_mode;
893 const struct kx_odr_map *odr_setting;
894
895 ret = kxcjk1013_get_mode(data, mode: &store_mode);
896 if (ret < 0)
897 return ret;
898
899 if (data->chipset == KXTF9)
900 odr_setting = kxcjk1013_find_odr_value(map: kxtf9_samp_freq_table,
901 ARRAY_SIZE(kxtf9_samp_freq_table),
902 val, val2);
903 else
904 odr_setting = kxcjk1013_find_odr_value(map: samp_freq_table,
905 ARRAY_SIZE(samp_freq_table),
906 val, val2);
907
908 if (IS_ERR(ptr: odr_setting))
909 return PTR_ERR(ptr: odr_setting);
910
911 /* To change ODR, the chip must be set to STANDBY as per spec */
912 ret = kxcjk1013_set_mode(data, mode: STANDBY);
913 if (ret < 0)
914 return ret;
915
916 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->data_ctrl,
917 value: odr_setting->odr_bits);
918 if (ret < 0) {
919 dev_err(&data->client->dev, "Error writing data_ctrl\n");
920 return ret;
921 }
922
923 data->odr_bits = odr_setting->odr_bits;
924
925 ret = i2c_smbus_write_byte_data(client: data->client, command: data->regs->wuf_ctrl,
926 value: odr_setting->wuf_bits);
927 if (ret < 0) {
928 dev_err(&data->client->dev, "Error writing reg_ctrl2\n");
929 return ret;
930 }
931
932 if (store_mode == OPERATION) {
933 ret = kxcjk1013_set_mode(data, mode: OPERATION);
934 if (ret < 0)
935 return ret;
936 }
937
938 return 0;
939}
940
941static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
942{
943 if (data->chipset == KXTF9)
944 return kxcjk1013_convert_odr_value(map: kxtf9_samp_freq_table,
945 ARRAY_SIZE(kxtf9_samp_freq_table),
946 odr_bits: data->odr_bits, val, val2);
947 else
948 return kxcjk1013_convert_odr_value(map: samp_freq_table,
949 ARRAY_SIZE(samp_freq_table),
950 odr_bits: data->odr_bits, val, val2);
951}
952
953static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
954{
955 u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
956 int ret;
957
958 ret = i2c_smbus_read_word_data(client: data->client, command: reg);
959 if (ret < 0) {
960 dev_err(&data->client->dev,
961 "failed to read accel_%c registers\n", 'x' + axis);
962 return ret;
963 }
964
965 return ret;
966}
967
968static int kxcjk1013_set_scale(struct kxcjk1013_data *data, int val)
969{
970 int ret, i;
971 enum kxcjk1013_mode store_mode;
972
973 for (i = 0; i < ARRAY_SIZE(KXCJK1013_scale_table); ++i) {
974 if (KXCJK1013_scale_table[i].scale == val) {
975 ret = kxcjk1013_get_mode(data, mode: &store_mode);
976 if (ret < 0)
977 return ret;
978
979 ret = kxcjk1013_set_mode(data, mode: STANDBY);
980 if (ret < 0)
981 return ret;
982
983 ret = kxcjk1013_set_range(data, range_index: i);
984 if (ret < 0)
985 return ret;
986
987 if (store_mode == OPERATION) {
988 ret = kxcjk1013_set_mode(data, mode: OPERATION);
989 if (ret)
990 return ret;
991 }
992
993 return 0;
994 }
995 }
996
997 return -EINVAL;
998}
999
1000static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
1001 struct iio_chan_spec const *chan, int *val,
1002 int *val2, long mask)
1003{
1004 struct kxcjk1013_data *data = iio_priv(indio_dev);
1005 int ret;
1006
1007 switch (mask) {
1008 case IIO_CHAN_INFO_RAW:
1009 mutex_lock(&data->mutex);
1010 if (iio_buffer_enabled(indio_dev))
1011 ret = -EBUSY;
1012 else {
1013 ret = kxcjk1013_set_power_state(data, on: true);
1014 if (ret < 0) {
1015 mutex_unlock(lock: &data->mutex);
1016 return ret;
1017 }
1018 ret = kxcjk1013_get_acc_reg(data, axis: chan->scan_index);
1019 if (ret < 0) {
1020 kxcjk1013_set_power_state(data, on: false);
1021 mutex_unlock(lock: &data->mutex);
1022 return ret;
1023 }
1024 *val = sign_extend32(value: ret >> chan->scan_type.shift,
1025 index: chan->scan_type.realbits - 1);
1026 ret = kxcjk1013_set_power_state(data, on: false);
1027 }
1028 mutex_unlock(lock: &data->mutex);
1029
1030 if (ret < 0)
1031 return ret;
1032
1033 return IIO_VAL_INT;
1034
1035 case IIO_CHAN_INFO_SCALE:
1036 *val = 0;
1037 *val2 = KXCJK1013_scale_table[data->range].scale;
1038 return IIO_VAL_INT_PLUS_MICRO;
1039
1040 case IIO_CHAN_INFO_SAMP_FREQ:
1041 mutex_lock(&data->mutex);
1042 ret = kxcjk1013_get_odr(data, val, val2);
1043 mutex_unlock(lock: &data->mutex);
1044 return ret;
1045
1046 default:
1047 return -EINVAL;
1048 }
1049}
1050
1051static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
1052 struct iio_chan_spec const *chan, int val,
1053 int val2, long mask)
1054{
1055 struct kxcjk1013_data *data = iio_priv(indio_dev);
1056 int ret;
1057
1058 switch (mask) {
1059 case IIO_CHAN_INFO_SAMP_FREQ:
1060 mutex_lock(&data->mutex);
1061 ret = kxcjk1013_set_odr(data, val, val2);
1062 mutex_unlock(lock: &data->mutex);
1063 break;
1064 case IIO_CHAN_INFO_SCALE:
1065 if (val)
1066 return -EINVAL;
1067
1068 mutex_lock(&data->mutex);
1069 ret = kxcjk1013_set_scale(data, val: val2);
1070 mutex_unlock(lock: &data->mutex);
1071 break;
1072 default:
1073 ret = -EINVAL;
1074 }
1075
1076 return ret;
1077}
1078
1079static int kxcjk1013_read_event(struct iio_dev *indio_dev,
1080 const struct iio_chan_spec *chan,
1081 enum iio_event_type type,
1082 enum iio_event_direction dir,
1083 enum iio_event_info info,
1084 int *val, int *val2)
1085{
1086 struct kxcjk1013_data *data = iio_priv(indio_dev);
1087
1088 *val2 = 0;
1089 switch (info) {
1090 case IIO_EV_INFO_VALUE:
1091 *val = data->wake_thres;
1092 break;
1093 case IIO_EV_INFO_PERIOD:
1094 *val = data->wake_dur;
1095 break;
1096 default:
1097 return -EINVAL;
1098 }
1099
1100 return IIO_VAL_INT;
1101}
1102
1103static int kxcjk1013_write_event(struct iio_dev *indio_dev,
1104 const struct iio_chan_spec *chan,
1105 enum iio_event_type type,
1106 enum iio_event_direction dir,
1107 enum iio_event_info info,
1108 int val, int val2)
1109{
1110 struct kxcjk1013_data *data = iio_priv(indio_dev);
1111
1112 if (data->ev_enable_state)
1113 return -EBUSY;
1114
1115 switch (info) {
1116 case IIO_EV_INFO_VALUE:
1117 data->wake_thres = val;
1118 break;
1119 case IIO_EV_INFO_PERIOD:
1120 data->wake_dur = val;
1121 break;
1122 default:
1123 return -EINVAL;
1124 }
1125
1126 return 0;
1127}
1128
1129static int kxcjk1013_read_event_config(struct iio_dev *indio_dev,
1130 const struct iio_chan_spec *chan,
1131 enum iio_event_type type,
1132 enum iio_event_direction dir)
1133{
1134 struct kxcjk1013_data *data = iio_priv(indio_dev);
1135
1136 return data->ev_enable_state;
1137}
1138
1139static int kxcjk1013_write_event_config(struct iio_dev *indio_dev,
1140 const struct iio_chan_spec *chan,
1141 enum iio_event_type type,
1142 enum iio_event_direction dir,
1143 int state)
1144{
1145 struct kxcjk1013_data *data = iio_priv(indio_dev);
1146 int ret;
1147
1148 if (state && data->ev_enable_state)
1149 return 0;
1150
1151 mutex_lock(&data->mutex);
1152
1153 if (!state && data->motion_trigger_on) {
1154 data->ev_enable_state = 0;
1155 mutex_unlock(lock: &data->mutex);
1156 return 0;
1157 }
1158
1159 /*
1160 * We will expect the enable and disable to do operation in
1161 * reverse order. This will happen here anyway as our
1162 * resume operation uses sync mode runtime pm calls, the
1163 * suspend operation will be delayed by autosuspend delay
1164 * So the disable operation will still happen in reverse of
1165 * enable operation. When runtime pm is disabled the mode
1166 * is always on so sequence doesn't matter
1167 */
1168 ret = kxcjk1013_set_power_state(data, on: state);
1169 if (ret < 0) {
1170 mutex_unlock(lock: &data->mutex);
1171 return ret;
1172 }
1173
1174 ret = kxcjk1013_setup_any_motion_interrupt(data, status: state);
1175 if (ret < 0) {
1176 kxcjk1013_set_power_state(data, on: false);
1177 data->ev_enable_state = 0;
1178 mutex_unlock(lock: &data->mutex);
1179 return ret;
1180 }
1181
1182 data->ev_enable_state = state;
1183 mutex_unlock(lock: &data->mutex);
1184
1185 return 0;
1186}
1187
1188static int kxcjk1013_buffer_preenable(struct iio_dev *indio_dev)
1189{
1190 struct kxcjk1013_data *data = iio_priv(indio_dev);
1191
1192 return kxcjk1013_set_power_state(data, on: true);
1193}
1194
1195static int kxcjk1013_buffer_postdisable(struct iio_dev *indio_dev)
1196{
1197 struct kxcjk1013_data *data = iio_priv(indio_dev);
1198
1199 return kxcjk1013_set_power_state(data, on: false);
1200}
1201
1202static ssize_t kxcjk1013_get_samp_freq_avail(struct device *dev,
1203 struct device_attribute *attr,
1204 char *buf)
1205{
1206 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
1207 struct kxcjk1013_data *data = iio_priv(indio_dev);
1208 const char *str;
1209
1210 if (data->chipset == KXTF9)
1211 str = kxtf9_samp_freq_avail;
1212 else
1213 str = kxcjk1013_samp_freq_avail;
1214
1215 return sprintf(buf, fmt: "%s\n", str);
1216}
1217
1218static IIO_DEVICE_ATTR(in_accel_sampling_frequency_available, S_IRUGO,
1219 kxcjk1013_get_samp_freq_avail, NULL, 0);
1220
1221static IIO_CONST_ATTR(in_accel_scale_available, "0.009582 0.019163 0.038326");
1222
1223static struct attribute *kxcjk1013_attributes[] = {
1224 &iio_dev_attr_in_accel_sampling_frequency_available.dev_attr.attr,
1225 &iio_const_attr_in_accel_scale_available.dev_attr.attr,
1226 NULL,
1227};
1228
1229static const struct attribute_group kxcjk1013_attrs_group = {
1230 .attrs = kxcjk1013_attributes,
1231};
1232
1233static const struct iio_event_spec kxcjk1013_event = {
1234 .type = IIO_EV_TYPE_THRESH,
1235 .dir = IIO_EV_DIR_EITHER,
1236 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
1237 BIT(IIO_EV_INFO_ENABLE) |
1238 BIT(IIO_EV_INFO_PERIOD)
1239};
1240
1241static const struct iio_mount_matrix *
1242kxcjk1013_get_mount_matrix(const struct iio_dev *indio_dev,
1243 const struct iio_chan_spec *chan)
1244{
1245 struct kxcjk1013_data *data = iio_priv(indio_dev);
1246
1247 return &data->orientation;
1248}
1249
1250static const struct iio_chan_spec_ext_info kxcjk1013_ext_info[] = {
1251 IIO_MOUNT_MATRIX(IIO_SHARED_BY_TYPE, kxcjk1013_get_mount_matrix),
1252 { }
1253};
1254
1255#define KXCJK1013_CHANNEL(_axis) { \
1256 .type = IIO_ACCEL, \
1257 .modified = 1, \
1258 .channel2 = IIO_MOD_##_axis, \
1259 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
1260 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
1261 BIT(IIO_CHAN_INFO_SAMP_FREQ), \
1262 .scan_index = AXIS_##_axis, \
1263 .scan_type = { \
1264 .sign = 's', \
1265 .realbits = 12, \
1266 .storagebits = 16, \
1267 .shift = 4, \
1268 .endianness = IIO_LE, \
1269 }, \
1270 .event_spec = &kxcjk1013_event, \
1271 .ext_info = kxcjk1013_ext_info, \
1272 .num_event_specs = 1 \
1273}
1274
1275static const struct iio_chan_spec kxcjk1013_channels[] = {
1276 KXCJK1013_CHANNEL(X),
1277 KXCJK1013_CHANNEL(Y),
1278 KXCJK1013_CHANNEL(Z),
1279 IIO_CHAN_SOFT_TIMESTAMP(3),
1280};
1281
1282static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
1283 .preenable = kxcjk1013_buffer_preenable,
1284 .postdisable = kxcjk1013_buffer_postdisable,
1285};
1286
1287static const struct iio_info kxcjk1013_info = {
1288 .attrs = &kxcjk1013_attrs_group,
1289 .read_raw = kxcjk1013_read_raw,
1290 .write_raw = kxcjk1013_write_raw,
1291 .read_event_value = kxcjk1013_read_event,
1292 .write_event_value = kxcjk1013_write_event,
1293 .write_event_config = kxcjk1013_write_event_config,
1294 .read_event_config = kxcjk1013_read_event_config,
1295};
1296
1297static const unsigned long kxcjk1013_scan_masks[] = {0x7, 0};
1298
1299static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
1300{
1301 struct iio_poll_func *pf = p;
1302 struct iio_dev *indio_dev = pf->indio_dev;
1303 struct kxcjk1013_data *data = iio_priv(indio_dev);
1304 int ret;
1305
1306 mutex_lock(&data->mutex);
1307 ret = i2c_smbus_read_i2c_block_data_or_emulated(client: data->client,
1308 KXCJK1013_REG_XOUT_L,
1309 length: AXIS_MAX * 2,
1310 values: (u8 *)data->scan.chans);
1311 mutex_unlock(lock: &data->mutex);
1312 if (ret < 0)
1313 goto err;
1314
1315 iio_push_to_buffers_with_timestamp(indio_dev, data: &data->scan,
1316 timestamp: data->timestamp);
1317err:
1318 iio_trigger_notify_done(trig: indio_dev->trig);
1319
1320 return IRQ_HANDLED;
1321}
1322
1323static void kxcjk1013_trig_reen(struct iio_trigger *trig)
1324{
1325 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1326 struct kxcjk1013_data *data = iio_priv(indio_dev);
1327 int ret;
1328
1329 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_rel);
1330 if (ret < 0)
1331 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1332}
1333
1334static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
1335 bool state)
1336{
1337 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
1338 struct kxcjk1013_data *data = iio_priv(indio_dev);
1339 int ret;
1340
1341 mutex_lock(&data->mutex);
1342
1343 if (!state && data->ev_enable_state && data->motion_trigger_on) {
1344 data->motion_trigger_on = false;
1345 mutex_unlock(lock: &data->mutex);
1346 return 0;
1347 }
1348
1349 ret = kxcjk1013_set_power_state(data, on: state);
1350 if (ret < 0) {
1351 mutex_unlock(lock: &data->mutex);
1352 return ret;
1353 }
1354 if (data->motion_trig == trig)
1355 ret = kxcjk1013_setup_any_motion_interrupt(data, status: state);
1356 else
1357 ret = kxcjk1013_setup_new_data_interrupt(data, status: state);
1358 if (ret < 0) {
1359 kxcjk1013_set_power_state(data, on: false);
1360 mutex_unlock(lock: &data->mutex);
1361 return ret;
1362 }
1363 if (data->motion_trig == trig)
1364 data->motion_trigger_on = state;
1365 else
1366 data->dready_trigger_on = state;
1367
1368 mutex_unlock(lock: &data->mutex);
1369
1370 return 0;
1371}
1372
1373static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
1374 .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
1375 .reenable = kxcjk1013_trig_reen,
1376};
1377
1378static void kxcjk1013_report_motion_event(struct iio_dev *indio_dev)
1379{
1380 struct kxcjk1013_data *data = iio_priv(indio_dev);
1381
1382 int ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_src2);
1383 if (ret < 0) {
1384 dev_err(&data->client->dev, "Error reading reg_int_src2\n");
1385 return;
1386 }
1387
1388 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XN)
1389 iio_push_event(indio_dev,
1390 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1391 0,
1392 IIO_MOD_X,
1393 IIO_EV_TYPE_THRESH,
1394 IIO_EV_DIR_FALLING),
1395 timestamp: data->timestamp);
1396
1397 if (ret & KXCJK1013_REG_INT_SRC2_BIT_XP)
1398 iio_push_event(indio_dev,
1399 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1400 0,
1401 IIO_MOD_X,
1402 IIO_EV_TYPE_THRESH,
1403 IIO_EV_DIR_RISING),
1404 timestamp: data->timestamp);
1405
1406 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YN)
1407 iio_push_event(indio_dev,
1408 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1409 0,
1410 IIO_MOD_Y,
1411 IIO_EV_TYPE_THRESH,
1412 IIO_EV_DIR_FALLING),
1413 timestamp: data->timestamp);
1414
1415 if (ret & KXCJK1013_REG_INT_SRC2_BIT_YP)
1416 iio_push_event(indio_dev,
1417 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1418 0,
1419 IIO_MOD_Y,
1420 IIO_EV_TYPE_THRESH,
1421 IIO_EV_DIR_RISING),
1422 timestamp: data->timestamp);
1423
1424 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZN)
1425 iio_push_event(indio_dev,
1426 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1427 0,
1428 IIO_MOD_Z,
1429 IIO_EV_TYPE_THRESH,
1430 IIO_EV_DIR_FALLING),
1431 timestamp: data->timestamp);
1432
1433 if (ret & KXCJK1013_REG_INT_SRC2_BIT_ZP)
1434 iio_push_event(indio_dev,
1435 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1436 0,
1437 IIO_MOD_Z,
1438 IIO_EV_TYPE_THRESH,
1439 IIO_EV_DIR_RISING),
1440 timestamp: data->timestamp);
1441}
1442
1443static irqreturn_t kxcjk1013_event_handler(int irq, void *private)
1444{
1445 struct iio_dev *indio_dev = private;
1446 struct kxcjk1013_data *data = iio_priv(indio_dev);
1447 int ret;
1448
1449 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_src1);
1450 if (ret < 0) {
1451 dev_err(&data->client->dev, "Error reading reg_int_src1\n");
1452 goto ack_intr;
1453 }
1454
1455 if (ret & KXCJK1013_REG_INT_SRC1_BIT_WUFS) {
1456 if (data->chipset == KXTF9)
1457 iio_push_event(indio_dev,
1458 IIO_MOD_EVENT_CODE(IIO_ACCEL,
1459 0,
1460 IIO_MOD_X_AND_Y_AND_Z,
1461 IIO_EV_TYPE_THRESH,
1462 IIO_EV_DIR_RISING),
1463 timestamp: data->timestamp);
1464 else
1465 kxcjk1013_report_motion_event(indio_dev);
1466 }
1467
1468ack_intr:
1469 if (data->dready_trigger_on)
1470 return IRQ_HANDLED;
1471
1472 ret = i2c_smbus_read_byte_data(client: data->client, command: data->regs->int_rel);
1473 if (ret < 0)
1474 dev_err(&data->client->dev, "Error reading reg_int_rel\n");
1475
1476 return IRQ_HANDLED;
1477}
1478
1479static irqreturn_t kxcjk1013_data_rdy_trig_poll(int irq, void *private)
1480{
1481 struct iio_dev *indio_dev = private;
1482 struct kxcjk1013_data *data = iio_priv(indio_dev);
1483
1484 data->timestamp = iio_get_time_ns(indio_dev);
1485
1486 if (data->dready_trigger_on)
1487 iio_trigger_poll(trig: data->dready_trig);
1488 else if (data->motion_trigger_on)
1489 iio_trigger_poll(trig: data->motion_trig);
1490
1491 if (data->ev_enable_state)
1492 return IRQ_WAKE_THREAD;
1493 else
1494 return IRQ_HANDLED;
1495}
1496
1497static const char *kxcjk1013_match_acpi_device(struct device *dev,
1498 enum kx_chipset *chipset,
1499 enum kx_acpi_type *acpi_type,
1500 const char **label)
1501{
1502 const struct acpi_device_id *id;
1503
1504 id = acpi_match_device(ids: dev->driver->acpi_match_table, dev);
1505 if (!id)
1506 return NULL;
1507
1508 if (strcmp(id->id, "SMO8500") == 0) {
1509 *acpi_type = ACPI_SMO8500;
1510 } else if (strcmp(id->id, "KIOX010A") == 0) {
1511 *acpi_type = ACPI_KIOX010A;
1512 *label = "accel-display";
1513 } else if (strcmp(id->id, "KIOX020A") == 0) {
1514 *label = "accel-base";
1515 }
1516
1517 *chipset = (enum kx_chipset)id->driver_data;
1518
1519 return dev_name(dev);
1520}
1521
1522static int kxcjk1013_probe(struct i2c_client *client)
1523{
1524 const struct i2c_device_id *id = i2c_client_get_device_id(client);
1525 static const char * const regulator_names[] = { "vdd", "vddio" };
1526 struct kxcjk1013_data *data;
1527 struct iio_dev *indio_dev;
1528 struct kxcjk_1013_platform_data *pdata;
1529 const char *name;
1530 int ret;
1531
1532 indio_dev = devm_iio_device_alloc(parent: &client->dev, sizeof_priv: sizeof(*data));
1533 if (!indio_dev)
1534 return -ENOMEM;
1535
1536 data = iio_priv(indio_dev);
1537 i2c_set_clientdata(client, data: indio_dev);
1538 data->client = client;
1539
1540 pdata = dev_get_platdata(dev: &client->dev);
1541 if (pdata) {
1542 data->active_high_intr = pdata->active_high_intr;
1543 data->orientation = pdata->orientation;
1544 } else {
1545 data->active_high_intr = true; /* default polarity */
1546
1547 if (!kxj1009_apply_acpi_orientation(dev: &client->dev, orientation: &data->orientation)) {
1548 ret = iio_read_mount_matrix(dev: &client->dev, matrix: &data->orientation);
1549 if (ret)
1550 return ret;
1551 }
1552
1553 }
1554
1555 ret = devm_regulator_bulk_get_enable(dev: &client->dev,
1556 ARRAY_SIZE(regulator_names),
1557 id: regulator_names);
1558 if (ret)
1559 return dev_err_probe(dev: &client->dev, err: ret, fmt: "Failed to get regulators\n");
1560
1561 /*
1562 * A typical delay of 10ms is required for powering up
1563 * according to the data sheets of supported chips.
1564 * Hence double that to play safe.
1565 */
1566 msleep(msecs: 20);
1567
1568 if (id) {
1569 data->chipset = (enum kx_chipset)(id->driver_data);
1570 name = id->name;
1571 } else if (ACPI_HANDLE(&client->dev)) {
1572 name = kxcjk1013_match_acpi_device(dev: &client->dev,
1573 chipset: &data->chipset,
1574 acpi_type: &data->acpi_type,
1575 label: &indio_dev->label);
1576 } else
1577 return -ENODEV;
1578
1579 switch (data->chipset) {
1580 case KXCJK1013:
1581 case KXCJ91008:
1582 case KXTJ21009:
1583 data->regs = &kxcjk1013_regs;
1584 break;
1585 case KXTF9:
1586 data->regs = &kxtf9_regs;
1587 break;
1588 case KX0231025:
1589 data->regs = &kx0231025_regs;
1590 break;
1591 default:
1592 return -EINVAL;
1593 }
1594
1595 ret = kxcjk1013_chip_init(data);
1596 if (ret < 0)
1597 return ret;
1598
1599 mutex_init(&data->mutex);
1600
1601 indio_dev->channels = kxcjk1013_channels;
1602 indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
1603 indio_dev->available_scan_masks = kxcjk1013_scan_masks;
1604 indio_dev->name = name;
1605 indio_dev->modes = INDIO_DIRECT_MODE;
1606 indio_dev->info = &kxcjk1013_info;
1607
1608 if (client->irq > 0 && data->acpi_type != ACPI_SMO8500) {
1609 ret = devm_request_threaded_irq(dev: &client->dev, irq: client->irq,
1610 handler: kxcjk1013_data_rdy_trig_poll,
1611 thread_fn: kxcjk1013_event_handler,
1612 IRQF_TRIGGER_RISING,
1613 KXCJK1013_IRQ_NAME,
1614 dev_id: indio_dev);
1615 if (ret)
1616 goto err_poweroff;
1617
1618 data->dready_trig = devm_iio_trigger_alloc(&client->dev,
1619 "%s-dev%d",
1620 indio_dev->name,
1621 iio_device_id(indio_dev));
1622 if (!data->dready_trig) {
1623 ret = -ENOMEM;
1624 goto err_poweroff;
1625 }
1626
1627 data->motion_trig = devm_iio_trigger_alloc(&client->dev,
1628 "%s-any-motion-dev%d",
1629 indio_dev->name,
1630 iio_device_id(indio_dev));
1631 if (!data->motion_trig) {
1632 ret = -ENOMEM;
1633 goto err_poweroff;
1634 }
1635
1636 data->dready_trig->ops = &kxcjk1013_trigger_ops;
1637 iio_trigger_set_drvdata(trig: data->dready_trig, data: indio_dev);
1638 ret = iio_trigger_register(trig_info: data->dready_trig);
1639 if (ret)
1640 goto err_poweroff;
1641
1642 indio_dev->trig = iio_trigger_get(trig: data->dready_trig);
1643
1644 data->motion_trig->ops = &kxcjk1013_trigger_ops;
1645 iio_trigger_set_drvdata(trig: data->motion_trig, data: indio_dev);
1646 ret = iio_trigger_register(trig_info: data->motion_trig);
1647 if (ret) {
1648 data->motion_trig = NULL;
1649 goto err_trigger_unregister;
1650 }
1651 }
1652
1653 ret = iio_triggered_buffer_setup(indio_dev,
1654 &iio_pollfunc_store_time,
1655 kxcjk1013_trigger_handler,
1656 &kxcjk1013_buffer_setup_ops);
1657 if (ret < 0) {
1658 dev_err(&client->dev, "iio triggered buffer setup failed\n");
1659 goto err_trigger_unregister;
1660 }
1661
1662 ret = pm_runtime_set_active(dev: &client->dev);
1663 if (ret)
1664 goto err_buffer_cleanup;
1665
1666 pm_runtime_enable(dev: &client->dev);
1667 pm_runtime_set_autosuspend_delay(dev: &client->dev,
1668 KXCJK1013_SLEEP_DELAY_MS);
1669 pm_runtime_use_autosuspend(dev: &client->dev);
1670
1671 ret = iio_device_register(indio_dev);
1672 if (ret < 0) {
1673 dev_err(&client->dev, "unable to register iio device\n");
1674 goto err_pm_cleanup;
1675 }
1676
1677 return 0;
1678
1679err_pm_cleanup:
1680 pm_runtime_dont_use_autosuspend(dev: &client->dev);
1681 pm_runtime_disable(dev: &client->dev);
1682err_buffer_cleanup:
1683 iio_triggered_buffer_cleanup(indio_dev);
1684err_trigger_unregister:
1685 if (data->dready_trig)
1686 iio_trigger_unregister(trig_info: data->dready_trig);
1687 if (data->motion_trig)
1688 iio_trigger_unregister(trig_info: data->motion_trig);
1689err_poweroff:
1690 kxcjk1013_set_mode(data, mode: STANDBY);
1691
1692 return ret;
1693}
1694
1695static void kxcjk1013_remove(struct i2c_client *client)
1696{
1697 struct iio_dev *indio_dev = i2c_get_clientdata(client);
1698 struct kxcjk1013_data *data = iio_priv(indio_dev);
1699
1700 iio_device_unregister(indio_dev);
1701
1702 pm_runtime_disable(dev: &client->dev);
1703 pm_runtime_set_suspended(dev: &client->dev);
1704
1705 iio_triggered_buffer_cleanup(indio_dev);
1706 if (data->dready_trig) {
1707 iio_trigger_unregister(trig_info: data->dready_trig);
1708 iio_trigger_unregister(trig_info: data->motion_trig);
1709 }
1710
1711 mutex_lock(&data->mutex);
1712 kxcjk1013_set_mode(data, mode: STANDBY);
1713 mutex_unlock(lock: &data->mutex);
1714}
1715
1716#ifdef CONFIG_PM_SLEEP
1717static int kxcjk1013_suspend(struct device *dev)
1718{
1719 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1720 struct kxcjk1013_data *data = iio_priv(indio_dev);
1721 int ret;
1722
1723 mutex_lock(&data->mutex);
1724 ret = kxcjk1013_set_mode(data, mode: STANDBY);
1725 mutex_unlock(lock: &data->mutex);
1726
1727 return ret;
1728}
1729
1730static int kxcjk1013_resume(struct device *dev)
1731{
1732 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1733 struct kxcjk1013_data *data = iio_priv(indio_dev);
1734 int ret = 0;
1735
1736 mutex_lock(&data->mutex);
1737 ret = kxcjk1013_set_mode(data, mode: OPERATION);
1738 if (ret == 0)
1739 ret = kxcjk1013_set_range(data, range_index: data->range);
1740 mutex_unlock(lock: &data->mutex);
1741
1742 return ret;
1743}
1744#endif
1745
1746#ifdef CONFIG_PM
1747static int kxcjk1013_runtime_suspend(struct device *dev)
1748{
1749 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1750 struct kxcjk1013_data *data = iio_priv(indio_dev);
1751 int ret;
1752
1753 ret = kxcjk1013_set_mode(data, mode: STANDBY);
1754 if (ret < 0) {
1755 dev_err(&data->client->dev, "powering off device failed\n");
1756 return -EAGAIN;
1757 }
1758 return 0;
1759}
1760
1761static int kxcjk1013_runtime_resume(struct device *dev)
1762{
1763 struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
1764 struct kxcjk1013_data *data = iio_priv(indio_dev);
1765 int ret;
1766 int sleep_val;
1767
1768 ret = kxcjk1013_set_mode(data, mode: OPERATION);
1769 if (ret < 0)
1770 return ret;
1771
1772 sleep_val = kxcjk1013_get_startup_times(data);
1773 if (sleep_val < 20000)
1774 usleep_range(min: sleep_val, max: 20000);
1775 else
1776 msleep_interruptible(msecs: sleep_val/1000);
1777
1778 return 0;
1779}
1780#endif
1781
1782static const struct dev_pm_ops kxcjk1013_pm_ops = {
1783 SET_SYSTEM_SLEEP_PM_OPS(kxcjk1013_suspend, kxcjk1013_resume)
1784 SET_RUNTIME_PM_OPS(kxcjk1013_runtime_suspend,
1785 kxcjk1013_runtime_resume, NULL)
1786};
1787
1788static const struct i2c_device_id kxcjk1013_id[] = {
1789 {"kxcjk1013", KXCJK1013},
1790 {"kxcj91008", KXCJ91008},
1791 {"kxtj21009", KXTJ21009},
1792 {"kxtf9", KXTF9},
1793 {"kx023-1025", KX0231025},
1794 {"SMO8500", KXCJ91008},
1795 {}
1796};
1797
1798MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
1799
1800static const struct of_device_id kxcjk1013_of_match[] = {
1801 { .compatible = "kionix,kxcjk1013", },
1802 { .compatible = "kionix,kxcj91008", },
1803 { .compatible = "kionix,kxtj21009", },
1804 { .compatible = "kionix,kxtf9", },
1805 { .compatible = "kionix,kx023-1025", },
1806 { }
1807};
1808MODULE_DEVICE_TABLE(of, kxcjk1013_of_match);
1809
1810static struct i2c_driver kxcjk1013_driver = {
1811 .driver = {
1812 .name = KXCJK1013_DRV_NAME,
1813 .acpi_match_table = ACPI_PTR(kx_acpi_match),
1814 .of_match_table = kxcjk1013_of_match,
1815 .pm = &kxcjk1013_pm_ops,
1816 },
1817 .probe = kxcjk1013_probe,
1818 .remove = kxcjk1013_remove,
1819 .id_table = kxcjk1013_id,
1820};
1821module_i2c_driver(kxcjk1013_driver);
1822
1823MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
1824MODULE_LICENSE("GPL v2");
1825MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
1826

source code of linux/drivers/iio/accel/kxcjk-1013.c