1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
|
/*
* DRV260X haptics driver family
*
* Author: Dan Murphy <dmurphy@ti.com>
*
* Copyright: (C) 2014 Texas Instruments, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <dt-bindings/input/ti-drv260x.h>
#include <linux/platform_data/drv260x-pdata.h>
#define DRV260X_STATUS 0x0
#define DRV260X_MODE 0x1
#define DRV260X_RT_PB_IN 0x2
#define DRV260X_LIB_SEL 0x3
#define DRV260X_WV_SEQ_1 0x4
#define DRV260X_WV_SEQ_2 0x5
#define DRV260X_WV_SEQ_3 0x6
#define DRV260X_WV_SEQ_4 0x7
#define DRV260X_WV_SEQ_5 0x8
#define DRV260X_WV_SEQ_6 0x9
#define DRV260X_WV_SEQ_7 0xa
#define DRV260X_WV_SEQ_8 0xb
#define DRV260X_GO 0xc
#define DRV260X_OVERDRIVE_OFF 0xd
#define DRV260X_SUSTAIN_P_OFF 0xe
#define DRV260X_SUSTAIN_N_OFF 0xf
#define DRV260X_BRAKE_OFF 0x10
#define DRV260X_A_TO_V_CTRL 0x11
#define DRV260X_A_TO_V_MIN_INPUT 0x12
#define DRV260X_A_TO_V_MAX_INPUT 0x13
#define DRV260X_A_TO_V_MIN_OUT 0x14
#define DRV260X_A_TO_V_MAX_OUT 0x15
#define DRV260X_RATED_VOLT 0x16
#define DRV260X_OD_CLAMP_VOLT 0x17
#define DRV260X_CAL_COMP 0x18
#define DRV260X_CAL_BACK_EMF 0x19
#define DRV260X_FEEDBACK_CTRL 0x1a
#define DRV260X_CTRL1 0x1b
#define DRV260X_CTRL2 0x1c
#define DRV260X_CTRL3 0x1d
#define DRV260X_CTRL4 0x1e
#define DRV260X_CTRL5 0x1f
#define DRV260X_LRA_LOOP_PERIOD 0x20
#define DRV260X_VBAT_MON 0x21
#define DRV260X_LRA_RES_PERIOD 0x22
#define DRV260X_MAX_REG 0x23
#define DRV260X_GO_BIT 0x01
/* Library Selection */
#define DRV260X_LIB_SEL_MASK 0x07
#define DRV260X_LIB_SEL_RAM 0x0
#define DRV260X_LIB_SEL_OD 0x1
#define DRV260X_LIB_SEL_40_60 0x2
#define DRV260X_LIB_SEL_60_80 0x3
#define DRV260X_LIB_SEL_100_140 0x4
#define DRV260X_LIB_SEL_140_PLUS 0x5
#define DRV260X_LIB_SEL_HIZ_MASK 0x10
#define DRV260X_LIB_SEL_HIZ_EN 0x01
#define DRV260X_LIB_SEL_HIZ_DIS 0
/* Mode register */
#define DRV260X_STANDBY (1 << 6)
#define DRV260X_STANDBY_MASK 0x40
#define DRV260X_INTERNAL_TRIGGER 0x00
#define DRV260X_EXT_TRIGGER_EDGE 0x01
#define DRV260X_EXT_TRIGGER_LEVEL 0x02
#define DRV260X_PWM_ANALOG_IN 0x03
#define DRV260X_AUDIOHAPTIC 0x04
#define DRV260X_RT_PLAYBACK 0x05
#define DRV260X_DIAGNOSTICS 0x06
#define DRV260X_AUTO_CAL 0x07
/* Audio to Haptics Control */
#define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2)
#define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2)
#define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2)
#define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2)
#define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00
#define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01
#define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02
#define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03
/* Min/Max Input/Output Voltages */
#define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19
#define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64
#define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19
#define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF
/* Feedback register */
#define DRV260X_FB_REG_ERM_MODE 0x7f
#define DRV260X_FB_REG_LRA_MODE (1 << 7)
#define DRV260X_BRAKE_FACTOR_MASK 0x1f
#define DRV260X_BRAKE_FACTOR_2X (1 << 0)
#define DRV260X_BRAKE_FACTOR_3X (2 << 4)
#define DRV260X_BRAKE_FACTOR_4X (3 << 4)
#define DRV260X_BRAKE_FACTOR_6X (4 << 4)
#define DRV260X_BRAKE_FACTOR_8X (5 << 4)
#define DRV260X_BRAKE_FACTOR_16 (6 << 4)
#define DRV260X_BRAKE_FACTOR_DIS (7 << 4)
#define DRV260X_LOOP_GAIN_LOW 0xf3
#define DRV260X_LOOP_GAIN_MED (1 << 2)
#define DRV260X_LOOP_GAIN_HIGH (2 << 2)
#define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2)
#define DRV260X_BEMF_GAIN_0 0xfc
#define DRV260X_BEMF_GAIN_1 (1 << 0)
#define DRV260X_BEMF_GAIN_2 (2 << 0)
#define DRV260X_BEMF_GAIN_3 (3 << 0)
/* Control 1 register */
#define DRV260X_AC_CPLE_EN (1 << 5)
#define DRV260X_STARTUP_BOOST (1 << 7)
/* Control 2 register */
#define DRV260X_IDISS_TIME_45 0
#define DRV260X_IDISS_TIME_75 (1 << 0)
#define DRV260X_IDISS_TIME_150 (1 << 1)
#define DRV260X_IDISS_TIME_225 0x03
#define DRV260X_BLANK_TIME_45 (0 << 2)
#define DRV260X_BLANK_TIME_75 (1 << 2)
#define DRV260X_BLANK_TIME_150 (2 << 2)
#define DRV260X_BLANK_TIME_225 (3 << 2)
#define DRV260X_SAMP_TIME_150 (0 << 4)
#define DRV260X_SAMP_TIME_200 (1 << 4)
#define DRV260X_SAMP_TIME_250 (2 << 4)
#define DRV260X_SAMP_TIME_300 (3 << 4)
#define DRV260X_BRAKE_STABILIZER (1 << 6)
#define DRV260X_UNIDIR_IN (0 << 7)
#define DRV260X_BIDIR_IN (1 << 7)
/* Control 3 Register */
#define DRV260X_LRA_OPEN_LOOP (1 << 0)
#define DRV260X_ANANLOG_IN (1 << 1)
#define DRV260X_LRA_DRV_MODE (1 << 2)
#define DRV260X_RTP_UNSIGNED_DATA (1 << 3)
#define DRV260X_SUPPLY_COMP_DIS (1 << 4)
#define DRV260X_ERM_OPEN_LOOP (1 << 5)
#define DRV260X_NG_THRESH_0 (0 << 6)
#define DRV260X_NG_THRESH_2 (1 << 6)
#define DRV260X_NG_THRESH_4 (2 << 6)
#define DRV260X_NG_THRESH_8 (3 << 6)
/* Control 4 Register */
#define DRV260X_AUTOCAL_TIME_150MS (0 << 4)
#define DRV260X_AUTOCAL_TIME_250MS (1 << 4)
#define DRV260X_AUTOCAL_TIME_500MS (2 << 4)
#define DRV260X_AUTOCAL_TIME_1000MS (3 << 4)
/**
* struct drv260x_data -
* @input_dev - Pointer to the input device
* @client - Pointer to the I2C client
* @regmap - Register map of the device
* @work - Work item used to off load the enable/disable of the vibration
* @enable_gpio - Pointer to the gpio used for enable/disabling
* @regulator - Pointer to the regulator for the IC
* @magnitude - Magnitude of the vibration event
* @mode - The operating mode of the IC (LRA_NO_CAL, ERM or LRA)
* @library - The vibration library to be used
* @rated_voltage - The rated_voltage of the actuator
* @overdriver_voltage - The over drive voltage of the actuator
**/
struct drv260x_data {
struct input_dev *input_dev;
struct i2c_client *client;
struct regmap *regmap;
struct work_struct work;
struct gpio_desc *enable_gpio;
struct regulator *regulator;
u32 magnitude;
u32 mode;
u32 library;
int rated_voltage;
int overdrive_voltage;
};
static struct reg_default drv260x_reg_defs[] = {
{ DRV260X_STATUS, 0xe0 },
{ DRV260X_MODE, 0x40 },
{ DRV260X_RT_PB_IN, 0x00 },
{ DRV260X_LIB_SEL, 0x00 },
{ DRV260X_WV_SEQ_1, 0x01 },
{ DRV260X_WV_SEQ_2, 0x00 },
{ DRV260X_WV_SEQ_3, 0x00 },
{ DRV260X_WV_SEQ_4, 0x00 },
{ DRV260X_WV_SEQ_5, 0x00 },
{ DRV260X_WV_SEQ_6, 0x00 },
{ DRV260X_WV_SEQ_7, 0x00 },
{ DRV260X_WV_SEQ_8, 0x00 },
{ DRV260X_GO, 0x00 },
{ DRV260X_OVERDRIVE_OFF, 0x00 },
{ DRV260X_SUSTAIN_P_OFF, 0x00 },
{ DRV260X_SUSTAIN_N_OFF, 0x00 },
{ DRV260X_BRAKE_OFF, 0x00 },
{ DRV260X_A_TO_V_CTRL, 0x05 },
{ DRV260X_A_TO_V_MIN_INPUT, 0x19 },
{ DRV260X_A_TO_V_MAX_INPUT, 0xff },
{ DRV260X_A_TO_V_MIN_OUT, 0x19 },
{ DRV260X_A_TO_V_MAX_OUT, 0xff },
{ DRV260X_RATED_VOLT, 0x3e },
{ DRV260X_OD_CLAMP_VOLT, 0x8c },
{ DRV260X_CAL_COMP, 0x0c },
{ DRV260X_CAL_BACK_EMF, 0x6c },
{ DRV260X_FEEDBACK_CTRL, 0x36 },
{ DRV260X_CTRL1, 0x93 },
{ DRV260X_CTRL2, 0xfa },
{ DRV260X_CTRL3, 0xa0 },
{ DRV260X_CTRL4, 0x20 },
{ DRV260X_CTRL5, 0x80 },
{ DRV260X_LRA_LOOP_PERIOD, 0x33 },
{ DRV260X_VBAT_MON, 0x00 },
{ DRV260X_LRA_RES_PERIOD, 0x00 },
};
#define DRV260X_DEF_RATED_VOLT 0x90
#define DRV260X_DEF_OD_CLAMP_VOLT 0x90
/**
* Rated and Overdriver Voltages:
* Calculated using the formula r = v * 255 / 5.6
* where r is what will be written to the register
* and v is the rated or overdriver voltage of the actuator
**/
static int drv260x_calculate_voltage(unsigned int voltage)
{
return (voltage * 255 / 5600);
}
static void drv260x_worker(struct work_struct *work)
{
struct drv260x_data *haptics = container_of(work, struct drv260x_data, work);
int error;
gpiod_set_value(haptics->enable_gpio, 1);
/* Data sheet says to wait 250us before trying to communicate */
udelay(250);
error = regmap_write(haptics->regmap,
DRV260X_MODE, DRV260X_RT_PLAYBACK);
if (error) {
dev_err(&haptics->client->dev,
"Failed to write set mode: %d\n", error);
} else {
error = regmap_write(haptics->regmap,
DRV260X_RT_PB_IN, haptics->magnitude);
if (error)
dev_err(&haptics->client->dev,
"Failed to set magnitude: %d\n", error);
}
}
static int drv260x_haptics_play(struct input_dev *input, void *data,
struct ff_effect *effect)
{
struct drv260x_data *haptics = input_get_drvdata(input);
haptics->mode = DRV260X_LRA_NO_CAL_MODE;
if (effect->u.rumble.strong_magnitude > 0)
haptics->magnitude = effect->u.rumble.strong_magnitude;
else if (effect->u.rumble.weak_magnitude > 0)
haptics->magnitude = effect->u.rumble.weak_magnitude;
else
haptics->magnitude = 0;
schedule_work(&haptics->work);
return 0;
}
static void drv260x_close(struct input_dev *input)
{
struct drv260x_data *haptics = input_get_drvdata(input);
int error;
cancel_work_sync(&haptics->work);
error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY);
if (error)
dev_err(&haptics->client->dev,
"Failed to enter standby mode: %d\n", error);
gpiod_set_value(haptics->enable_gpio, 0);
}
static const struct reg_default drv260x_lra_cal_regs[] = {
{ DRV260X_MODE, DRV260X_AUTO_CAL },
{ DRV260X_CTRL3, DRV260X_NG_THRESH_2 },
{ DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE |
DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH },
};
static const struct reg_default drv260x_lra_init_regs[] = {
{ DRV260X_MODE, DRV260X_RT_PLAYBACK },
{ DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS |
DRV260X_AUDIO_HAPTICS_FILTER_125HZ },
{ DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT },
{ DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT },
{ DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT },
{ DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT },
{ DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE |
DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED |
DRV260X_BEMF_GAIN_3 },
{ DRV260X_CTRL1, DRV260X_STARTUP_BOOST },
{ DRV260X_CTRL2, DRV260X_SAMP_TIME_250 },
{ DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN },
{ DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS },
};
static const struct reg_default drv260x_erm_cal_regs[] = {
{ DRV260X_MODE, DRV260X_AUTO_CAL },
{ DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT },
{ DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT },
{ DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT },
{ DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT },
{ DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X |
DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 },
{ DRV260X_CTRL1, DRV260X_STARTUP_BOOST },
{ DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 |
DRV260X_IDISS_TIME_75 },
{ DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP },
{ DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS },
};
static int drv260x_init(struct drv260x_data *haptics)
{
int error;
unsigned int cal_buf;
error = regmap_write(haptics->regmap,
DRV260X_RATED_VOLT, haptics->rated_voltage);
if (error) {
dev_err(&haptics->client->dev,
"Failed to write DRV260X_RATED_VOLT register: %d\n",
error);
return error;
}
error = regmap_write(haptics->regmap,
DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage);
if (error) {
dev_err(&haptics->client->dev,
"Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n",
error);
return error;
}
switch (haptics->mode) {
case DRV260X_LRA_MODE:
error = regmap_register_patch(haptics->regmap,
drv260x_lra_cal_regs,
ARRAY_SIZE(drv260x_lra_cal_regs));
if (error) {
dev_err(&haptics->client->dev,
"Failed to write LRA calibration registers: %d\n",
error);
return error;
}
break;
case DRV260X_ERM_MODE:
error = regmap_register_patch(haptics->regmap,
drv260x_erm_cal_regs,
ARRAY_SIZE(drv260x_erm_cal_regs));
if (error) {
dev_err(&haptics->client->dev,
"Failed to write ERM calibration registers: %d\n",
error);
return error;
}
error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL,
DRV260X_LIB_SEL_MASK,
haptics->library);
if (error) {
dev_err(&haptics->client->dev,
"Failed to write DRV260X_LIB_SEL register: %d\n",
error);
return error;
}
break;
default:
error = regmap_register_patch(haptics->regmap,
drv260x_lra_init_regs,
ARRAY_SIZE(drv260x_lra_init_regs));
if (error) {
dev_err(&haptics->client->dev,
"Failed to write LRA init registers: %d\n",
error);
return error;
}
error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL,
DRV260X_LIB_SEL_MASK,
haptics->library);
if (error) {
dev_err(&haptics->client->dev,
"Failed to write DRV260X_LIB_SEL register: %d\n",
error);
return error;
}
/* No need to set GO bit here */
return 0;
}
error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT);
if (error) {
dev_err(&haptics->client->dev,
"Failed to write GO register: %d\n",
error);
return error;
}
do {
error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf);
if (error) {
dev_err(&haptics->client->dev,
"Failed to read GO register: %d\n",
error);
return error;
}
} while (cal_buf == DRV260X_GO_BIT);
return 0;
}
static const struct regmap_config drv260x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = DRV260X_MAX_REG,
.reg_defaults = drv260x_reg_defs,
.num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs),
.cache_type = REGCACHE_NONE,
};
#ifdef CONFIG_OF
static int drv260x_parse_dt(struct device *dev,
struct drv260x_data *haptics)
{
struct device_node *np = dev->of_node;
unsigned int voltage;
int error;
error = of_property_read_u32(np, "mode", &haptics->mode);
if (error) {
dev_err(dev, "%s: No entry for mode\n", __func__);
return error;
}
error = of_property_read_u32(np, "library-sel", &haptics->library);
if (error) {
dev_err(dev, "%s: No entry for library selection\n",
__func__);
return error;
}
error = of_property_read_u32(np, "vib-rated-mv", &voltage);
if (!error)
haptics->rated_voltage = drv260x_calculate_voltage(voltage);
error = of_property_read_u32(np, "vib-overdrive-mv", &voltage);
if (!error)
haptics->overdrive_voltage = drv260x_calculate_voltage(voltage);
return 0;
}
#else
static inline int drv260x_parse_dt(struct device *dev,
struct drv260x_data *haptics)
{
dev_err(dev, "no platform data defined\n");
return -EINVAL;
}
#endif
static int drv260x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
const struct drv260x_platform_data *pdata = dev_get_platdata(&client->dev);
struct drv260x_data *haptics;
int error;
haptics = devm_kzalloc(&client->dev, sizeof(*haptics), GFP_KERNEL);
if (!haptics)
return -ENOMEM;
haptics->rated_voltage = DRV260X_DEF_OD_CLAMP_VOLT;
haptics->rated_voltage = DRV260X_DEF_RATED_VOLT;
if (pdata) {
haptics->mode = pdata->mode;
haptics->library = pdata->library_selection;
if (pdata->vib_overdrive_voltage)
haptics->overdrive_voltage = drv260x_calculate_voltage(pdata->vib_overdrive_voltage);
if (pdata->vib_rated_voltage)
haptics->rated_voltage = drv260x_calculate_voltage(pdata->vib_rated_voltage);
} else if (client->dev.of_node) {
error = drv260x_parse_dt(&client->dev, haptics);
if (error)
return error;
} else {
dev_err(&client->dev, "Platform data not set\n");
return -ENODEV;
}
if (haptics->mode < DRV260X_LRA_MODE ||
haptics->mode > DRV260X_ERM_MODE) {
dev_err(&client->dev,
"Vibrator mode is invalid: %i\n",
haptics->mode);
return -EINVAL;
}
if (haptics->library < DRV260X_LIB_EMPTY ||
haptics->library > DRV260X_ERM_LIB_F) {
dev_err(&client->dev,
"Library value is invalid: %i\n", haptics->library);
return -EINVAL;
}
if (haptics->mode == DRV260X_LRA_MODE &&
haptics->library != DRV260X_LIB_EMPTY &&
haptics->library != DRV260X_LIB_LRA) {
dev_err(&client->dev,
"LRA Mode with ERM Library mismatch\n");
return -EINVAL;
}
if (haptics->mode == DRV260X_ERM_MODE &&
(haptics->library == DRV260X_LIB_EMPTY ||
haptics->library == DRV260X_LIB_LRA)) {
dev_err(&client->dev,
"ERM Mode with LRA Library mismatch\n");
return -EINVAL;
}
haptics->regulator = devm_regulator_get(&client->dev, "vbat");
if (IS_ERR(haptics->regulator)) {
error = PTR_ERR(haptics->regulator);
dev_err(&client->dev,
"unable to get regulator, error: %d\n", error);
return error;
}
haptics->enable_gpio = devm_gpiod_get(&client->dev, "enable");
if (IS_ERR(haptics->enable_gpio)) {
error = PTR_ERR(haptics->enable_gpio);
if (error != -ENOENT && error != -ENOSYS)
return error;
haptics->enable_gpio = NULL;
} else {
gpiod_direction_output(haptics->enable_gpio, 1);
}
haptics->input_dev = devm_input_allocate_device(&client->dev);
if (!haptics->input_dev) {
dev_err(&client->dev, "Failed to allocate input device\n");
return -ENOMEM;
}
haptics->input_dev->name = "drv260x:haptics";
haptics->input_dev->dev.parent = client->dev.parent;
haptics->input_dev->close = drv260x_close;
input_set_drvdata(haptics->input_dev, haptics);
input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE);
error = input_ff_create_memless(haptics->input_dev, NULL,
drv260x_haptics_play);
if (error) {
dev_err(&client->dev, "input_ff_create() failed: %d\n",
error);
return error;
}
INIT_WORK(&haptics->work, drv260x_worker);
haptics->client = client;
i2c_set_clientdata(client, haptics);
haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config);
if (IS_ERR(haptics->regmap)) {
error = PTR_ERR(haptics->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
error);
return error;
}
error = drv260x_init(haptics);
if (error) {
dev_err(&client->dev, "Device init failed: %d\n", error);
return error;
}
error = input_register_device(haptics->input_dev);
if (error) {
dev_err(&client->dev, "couldn't register input device: %d\n",
error);
return error;
}
return 0;
}
static int __maybe_unused drv260x_suspend(struct device *dev)
{
struct drv260x_data *haptics = dev_get_drvdata(dev);
int ret = 0;
mutex_lock(&haptics->input_dev->mutex);
if (haptics->input_dev->users) {
ret = regmap_update_bits(haptics->regmap,
DRV260X_MODE,
DRV260X_STANDBY_MASK,
DRV260X_STANDBY);
if (ret) {
dev_err(dev, "Failed to set standby mode\n");
goto out;
}
gpiod_set_value(haptics->enable_gpio, 0);
ret = regulator_disable(haptics->regulator);
if (ret) {
dev_err(dev, "Failed to disable regulator\n");
regmap_update_bits(haptics->regmap,
DRV260X_MODE,
DRV260X_STANDBY_MASK, 0);
}
}
out:
mutex_unlock(&haptics->input_dev->mutex);
return ret;
}
static int __maybe_unused drv260x_resume(struct device *dev)
{
struct drv260x_data *haptics = dev_get_drvdata(dev);
int ret = 0;
mutex_lock(&haptics->input_dev->mutex);
if (haptics->input_dev->users) {
ret = regulator_enable(haptics->regulator);
if (ret) {
dev_err(dev, "Failed to enable regulator\n");
goto out;
}
ret = regmap_update_bits(haptics->regmap,
DRV260X_MODE,
DRV260X_STANDBY_MASK, 0);
if (ret) {
dev_err(dev, "Failed to unset standby mode\n");
regulator_disable(haptics->regulator);
goto out;
}
gpiod_set_value(haptics->enable_gpio, 1);
}
out:
mutex_unlock(&haptics->input_dev->mutex);
return ret;
}
static SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume);
static const struct i2c_device_id drv260x_id[] = {
{ "drv2605l", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, drv260x_id);
#ifdef CONFIG_OF
static const struct of_device_id drv260x_of_match[] = {
{ .compatible = "ti,drv2604", },
{ .compatible = "ti,drv2604l", },
{ .compatible = "ti,drv2605", },
{ .compatible = "ti,drv2605l", },
{ }
};
MODULE_DEVICE_TABLE(of, drv260x_of_match);
#endif
static struct i2c_driver drv260x_driver = {
.probe = drv260x_probe,
.driver = {
.name = "drv260x-haptics",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(drv260x_of_match),
.pm = &drv260x_pm_ops,
},
.id_table = drv260x_id,
};
module_i2c_driver(drv260x_driver);
MODULE_ALIAS("platform:drv260x-haptics");
MODULE_DESCRIPTION("TI DRV260x haptics driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
|