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7
8#include <linux/devm-helpers.h>
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/i2c.h>
12#include <linux/slab.h>
13#include <linux/input.h>
14#include <linux/interrupt.h>
15#include <linux/err.h>
16#include <linux/platform_device.h>
17#include <linux/mfd/max77693.h>
18#include <linux/mfd/max77693-common.h>
19#include <linux/mfd/max77693-private.h>
20#include <linux/extcon-provider.h>
21#include <linux/regmap.h>
22#include <linux/irqdomain.h>
23
24#define DEV_NAME "max77693-muic"
25#define DELAY_MS_DEFAULT 20000
26
27
28
29
30
31
32
33static struct max77693_reg_data default_init_data[] = {
34 {
35
36 .addr = MAX77693_MUIC_REG_STATUS2,
37 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
38 }, {
39
40 .addr = MAX77693_MUIC_REG_INTMASK1,
41 .data = INTMASK1_ADC1K_MASK
42 | INTMASK1_ADC_MASK,
43 }, {
44
45 .addr = MAX77693_MUIC_REG_INTMASK2,
46 .data = INTMASK2_CHGTYP_MASK,
47 }, {
48
49 .addr = MAX77693_MUIC_REG_INTMASK3,
50 .data = 0x0,
51 }, {
52
53 .addr = MAX77693_MUIC_REG_CDETCTRL2,
54 .data = CDETCTRL2_VIDRMEN_MASK
55 | CDETCTRL2_DXOVPEN_MASK,
56 },
57};
58
59enum max77693_muic_adc_debounce_time {
60 ADC_DEBOUNCE_TIME_5MS = 0,
61 ADC_DEBOUNCE_TIME_10MS,
62 ADC_DEBOUNCE_TIME_25MS,
63 ADC_DEBOUNCE_TIME_38_62MS,
64};
65
66struct max77693_muic_info {
67 struct device *dev;
68 struct max77693_dev *max77693;
69 struct extcon_dev *edev;
70 int prev_cable_type;
71 int prev_cable_type_gnd;
72 int prev_chg_type;
73 int prev_button_type;
74 u8 status[2];
75
76 int irq;
77 struct work_struct irq_work;
78 struct mutex mutex;
79
80
81
82
83
84
85
86 struct delayed_work wq_detcable;
87
88
89 struct input_dev *dock;
90
91
92
93
94
95 int path_usb;
96 int path_uart;
97};
98
99enum max77693_muic_cable_group {
100 MAX77693_CABLE_GROUP_ADC = 0,
101 MAX77693_CABLE_GROUP_ADC_GND,
102 MAX77693_CABLE_GROUP_CHG,
103 MAX77693_CABLE_GROUP_VBVOLT,
104};
105
106enum max77693_muic_charger_type {
107 MAX77693_CHARGER_TYPE_NONE = 0,
108 MAX77693_CHARGER_TYPE_USB,
109 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
110 MAX77693_CHARGER_TYPE_DEDICATED_CHG,
111 MAX77693_CHARGER_TYPE_APPLE_500MA,
112 MAX77693_CHARGER_TYPE_APPLE_1A_2A,
113 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
114};
115
116
117
118
119
120
121
122struct max77693_muic_irq {
123 unsigned int irq;
124 const char *name;
125 unsigned int virq;
126};
127
128static struct max77693_muic_irq muic_irqs[] = {
129 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
130 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
131 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
132 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
133 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
134 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
135 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
136 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
137 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
138 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
139 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
140 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
141 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
142 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
143 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
144 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
145};
146
147
148enum max77693_muic_acc_type {
149 MAX77693_MUIC_ADC_GROUND = 0x0,
150 MAX77693_MUIC_ADC_SEND_END_BUTTON,
151 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
152 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
153 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
154 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
155 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
156 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
157 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
158 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
159 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
160 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
161 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
162 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
163 MAX77693_MUIC_ADC_RESERVED_ACC_1,
164 MAX77693_MUIC_ADC_RESERVED_ACC_2,
165 MAX77693_MUIC_ADC_RESERVED_ACC_3,
166 MAX77693_MUIC_ADC_RESERVED_ACC_4,
167 MAX77693_MUIC_ADC_RESERVED_ACC_5,
168 MAX77693_MUIC_ADC_CEA936_AUDIO,
169 MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
170 MAX77693_MUIC_ADC_TTY_CONVERTER,
171 MAX77693_MUIC_ADC_UART_CABLE,
172 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
173 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
174 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
175 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
176 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
177 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
178 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
179 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
180 MAX77693_MUIC_ADC_OPEN,
181
182
183
184
185
186
187 MAX77693_MUIC_GND_USB_HOST = 0x100,
188 MAX77693_MUIC_GND_USB_HOST_VB = 0x104,
189 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,
190 MAX77693_MUIC_GND_MHL = 0x103,
191 MAX77693_MUIC_GND_MHL_VB = 0x107,
192};
193
194
195
196
197static const unsigned int max77693_extcon_cable[] = {
198 EXTCON_USB,
199 EXTCON_USB_HOST,
200 EXTCON_CHG_USB_SDP,
201 EXTCON_CHG_USB_DCP,
202 EXTCON_CHG_USB_FAST,
203 EXTCON_CHG_USB_SLOW,
204 EXTCON_CHG_USB_CDP,
205 EXTCON_DISP_MHL,
206 EXTCON_JIG,
207 EXTCON_DOCK,
208 EXTCON_NONE,
209};
210
211
212
213
214
215
216static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
217 enum max77693_muic_adc_debounce_time time)
218{
219 int ret;
220
221 switch (time) {
222 case ADC_DEBOUNCE_TIME_5MS:
223 case ADC_DEBOUNCE_TIME_10MS:
224 case ADC_DEBOUNCE_TIME_25MS:
225 case ADC_DEBOUNCE_TIME_38_62MS:
226
227
228
229
230
231 ret = regmap_write(info->max77693->regmap_muic,
232 MAX77693_MUIC_REG_CTRL3,
233 time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
234 if (ret) {
235 dev_err(info->dev, "failed to set ADC debounce time\n");
236 return ret;
237 }
238 break;
239 default:
240 dev_err(info->dev, "invalid ADC debounce time\n");
241 return -EINVAL;
242 }
243
244 return 0;
245};
246
247
248
249
250
251
252
253
254
255
256
257static int max77693_muic_set_path(struct max77693_muic_info *info,
258 u8 val, bool attached)
259{
260 int ret;
261 unsigned int ctrl1, ctrl2 = 0;
262
263 if (attached)
264 ctrl1 = val;
265 else
266 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
267
268 ret = regmap_update_bits(info->max77693->regmap_muic,
269 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
270 if (ret < 0) {
271 dev_err(info->dev, "failed to update MUIC register\n");
272 return ret;
273 }
274
275 if (attached)
276 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;
277 else
278 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK;
279
280 ret = regmap_update_bits(info->max77693->regmap_muic,
281 MAX77693_MUIC_REG_CTRL2,
282 MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
283 ctrl2);
284 if (ret < 0) {
285 dev_err(info->dev, "failed to update MUIC register\n");
286 return ret;
287 }
288
289 dev_info(info->dev,
290 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
291 ctrl1, ctrl2, attached ? "attached" : "detached");
292
293 return 0;
294}
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
310 enum max77693_muic_cable_group group, bool *attached)
311{
312 int cable_type = 0;
313 int adc;
314 int adc1k;
315 int adclow;
316 int vbvolt;
317 int chg_type;
318
319 switch (group) {
320 case MAX77693_CABLE_GROUP_ADC:
321
322
323
324
325 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
326 adc >>= MAX77693_STATUS1_ADC_SHIFT;
327
328
329
330
331
332
333 if (adc == MAX77693_MUIC_ADC_OPEN) {
334 *attached = false;
335
336 cable_type = info->prev_cable_type;
337 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
338 } else {
339 *attached = true;
340
341 cable_type = info->prev_cable_type = adc;
342 }
343 break;
344 case MAX77693_CABLE_GROUP_ADC_GND:
345
346
347
348
349 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
350 adc >>= MAX77693_STATUS1_ADC_SHIFT;
351
352
353
354
355
356
357 if (adc == MAX77693_MUIC_ADC_OPEN) {
358 *attached = false;
359
360 cable_type = info->prev_cable_type_gnd;
361 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
362 } else {
363 *attached = true;
364
365 adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
366 adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
367 adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
368 adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
369
370 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
371 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
372
373
374
375
376
377
378
379
380
381 cable_type = ((0x1 << 8)
382 | (vbvolt << 2)
383 | (adclow << 1)
384 | adc1k);
385
386 info->prev_cable_type = adc;
387 info->prev_cable_type_gnd = cable_type;
388 }
389
390 break;
391 case MAX77693_CABLE_GROUP_CHG:
392
393
394
395
396 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
397 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
398
399 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
400 *attached = false;
401
402 cable_type = info->prev_chg_type;
403 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
404 } else {
405 *attached = true;
406
407
408
409
410
411
412 cable_type = info->prev_chg_type = chg_type;
413 }
414
415 break;
416 case MAX77693_CABLE_GROUP_VBVOLT:
417
418
419
420
421 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
422 adc >>= MAX77693_STATUS1_ADC_SHIFT;
423 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
424 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
425
426 if (adc == MAX77693_MUIC_ADC_OPEN
427 && chg_type == MAX77693_CHARGER_TYPE_NONE)
428 *attached = false;
429 else
430 *attached = true;
431
432
433
434
435
436 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
437 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
438
439 cable_type = vbvolt;
440 break;
441 default:
442 dev_err(info->dev, "Unknown cable group (%d)\n", group);
443 cable_type = -EINVAL;
444 break;
445 }
446
447 return cable_type;
448}
449
450static int max77693_muic_dock_handler(struct max77693_muic_info *info,
451 int cable_type, bool attached)
452{
453 int ret = 0;
454 int vbvolt;
455 bool cable_attached;
456 unsigned int dock_id;
457
458 dev_info(info->dev,
459 "external connector is %s (adc:0x%02x)\n",
460 attached ? "attached" : "detached", cable_type);
461
462 switch (cable_type) {
463 case MAX77693_MUIC_ADC_RESERVED_ACC_3:
464
465
466
467
468
469
470 vbvolt = max77693_muic_get_cable_type(info,
471 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
472 if (attached && !vbvolt) {
473 dev_warn(info->dev,
474 "Cannot detect external power supply\n");
475 return 0;
476 }
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497 ret = max77693_muic_set_path(info, info->path_usb, attached);
498 if (ret < 0)
499 return ret;
500
501 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
502 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
503 goto out;
504 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
505 dock_id = EXTCON_DOCK;
506 break;
507 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
508 dock_id = EXTCON_DOCK;
509 if (!attached) {
510 extcon_set_state_sync(info->edev, EXTCON_USB, false);
511 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
512 false);
513 }
514 break;
515 default:
516 dev_err(info->dev, "failed to detect %s dock device\n",
517 attached ? "attached" : "detached");
518 return -EINVAL;
519 }
520
521
522 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
523 attached);
524 if (ret < 0)
525 return ret;
526 extcon_set_state_sync(info->edev, dock_id, attached);
527
528out:
529 return 0;
530}
531
532static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
533 int button_type, bool attached)
534{
535 struct input_dev *dock = info->dock;
536 unsigned int code;
537
538 switch (button_type) {
539 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
540 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
541
542 code = KEY_PREVIOUSSONG;
543 break;
544 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
545 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
546
547 code = KEY_NEXTSONG;
548 break;
549 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
550
551 code = KEY_VOLUMEDOWN;
552 break;
553 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
554
555 code = KEY_VOLUMEUP;
556 break;
557 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
558 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
559
560 code = KEY_PLAYPAUSE;
561 break;
562 default:
563 dev_err(info->dev,
564 "failed to detect %s key (adc:0x%x)\n",
565 attached ? "pressed" : "released", button_type);
566 return -EINVAL;
567 }
568
569 input_event(dock, EV_KEY, code, attached);
570 input_sync(dock);
571
572 return 0;
573}
574
575static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
576{
577 int cable_type_gnd;
578 int ret = 0;
579 bool attached;
580
581 cable_type_gnd = max77693_muic_get_cable_type(info,
582 MAX77693_CABLE_GROUP_ADC_GND, &attached);
583
584 switch (cable_type_gnd) {
585 case MAX77693_MUIC_GND_USB_HOST:
586 case MAX77693_MUIC_GND_USB_HOST_VB:
587
588 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
589 attached);
590 if (ret < 0)
591 return ret;
592 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
593 break;
594 case MAX77693_MUIC_GND_AV_CABLE_LOAD:
595
596 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
597 attached);
598 if (ret < 0)
599 return ret;
600 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
601 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
602 attached);
603 break;
604 case MAX77693_MUIC_GND_MHL:
605 case MAX77693_MUIC_GND_MHL_VB:
606
607 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
608 break;
609 default:
610 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
611 attached ? "attached" : "detached");
612 return -EINVAL;
613 }
614
615 return 0;
616}
617
618static int max77693_muic_jig_handler(struct max77693_muic_info *info,
619 int cable_type, bool attached)
620{
621 int ret = 0;
622 u8 path = MAX77693_CONTROL1_SW_OPEN;
623
624 dev_info(info->dev,
625 "external connector is %s (adc:0x%02x)\n",
626 attached ? "attached" : "detached", cable_type);
627
628 switch (cable_type) {
629 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
630 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
631
632 path = MAX77693_CONTROL1_SW_USB;
633 break;
634 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
635 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
636
637 path = MAX77693_CONTROL1_SW_UART;
638 break;
639 default:
640 dev_err(info->dev, "failed to detect %s jig cable\n",
641 attached ? "attached" : "detached");
642 return -EINVAL;
643 }
644
645 ret = max77693_muic_set_path(info, path, attached);
646 if (ret < 0)
647 return ret;
648
649 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
650
651 return 0;
652}
653
654static int max77693_muic_adc_handler(struct max77693_muic_info *info)
655{
656 int cable_type;
657 int button_type;
658 bool attached;
659 int ret = 0;
660
661
662 cable_type = max77693_muic_get_cable_type(info,
663 MAX77693_CABLE_GROUP_ADC, &attached);
664
665 dev_info(info->dev,
666 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
667 attached ? "attached" : "detached", cable_type,
668 info->prev_cable_type);
669
670 switch (cable_type) {
671 case MAX77693_MUIC_ADC_GROUND:
672
673 max77693_muic_adc_ground_handler(info);
674 break;
675 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
676 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
677 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
678 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
679
680 ret = max77693_muic_jig_handler(info, cable_type, attached);
681 if (ret < 0)
682 return ret;
683 break;
684 case MAX77693_MUIC_ADC_RESERVED_ACC_3:
685 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
686 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
687
688
689
690
691
692
693
694
695
696 ret = max77693_muic_dock_handler(info, cable_type, attached);
697 if (ret < 0)
698 return ret;
699 break;
700 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
701 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
702 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
703 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
704 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
705
706
707
708
709
710
711
712
713
714
715 if (attached)
716 button_type = info->prev_button_type = cable_type;
717 else
718 button_type = info->prev_button_type;
719
720 ret = max77693_muic_dock_button_handler(info, button_type,
721 attached);
722 if (ret < 0)
723 return ret;
724 break;
725 case MAX77693_MUIC_ADC_SEND_END_BUTTON:
726 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
727 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
728 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
729 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
730 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
731 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
732 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
733 case MAX77693_MUIC_ADC_RESERVED_ACC_1:
734 case MAX77693_MUIC_ADC_RESERVED_ACC_2:
735 case MAX77693_MUIC_ADC_RESERVED_ACC_4:
736 case MAX77693_MUIC_ADC_RESERVED_ACC_5:
737 case MAX77693_MUIC_ADC_CEA936_AUDIO:
738 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
739 case MAX77693_MUIC_ADC_TTY_CONVERTER:
740 case MAX77693_MUIC_ADC_UART_CABLE:
741 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
742 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
743
744
745
746
747
748 dev_info(info->dev,
749 "accessory is %s but it isn't used (adc:0x%x)\n",
750 attached ? "attached" : "detached", cable_type);
751 return -EAGAIN;
752 default:
753 dev_err(info->dev,
754 "failed to detect %s accessory (adc:0x%x)\n",
755 attached ? "attached" : "detached", cable_type);
756 return -EINVAL;
757 }
758
759 return 0;
760}
761
762static int max77693_muic_chg_handler(struct max77693_muic_info *info)
763{
764 int chg_type;
765 int cable_type_gnd;
766 int cable_type;
767 bool attached;
768 bool cable_attached;
769 int ret = 0;
770
771 chg_type = max77693_muic_get_cable_type(info,
772 MAX77693_CABLE_GROUP_CHG, &attached);
773
774 dev_info(info->dev,
775 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
776 attached ? "attached" : "detached",
777 chg_type, info->prev_chg_type);
778
779 switch (chg_type) {
780 case MAX77693_CHARGER_TYPE_USB:
781 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
782 case MAX77693_CHARGER_TYPE_NONE:
783
784 cable_type_gnd = max77693_muic_get_cable_type(info,
785 MAX77693_CABLE_GROUP_ADC_GND,
786 &cable_attached);
787 switch (cable_type_gnd) {
788 case MAX77693_MUIC_GND_MHL:
789 case MAX77693_MUIC_GND_MHL_VB:
790
791
792
793
794
795
796
797
798
799
800
801
802
803 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
804 attached);
805 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
806 cable_attached);
807 break;
808 }
809
810
811 cable_type = max77693_muic_get_cable_type(info,
812 MAX77693_CABLE_GROUP_ADC,
813 &cable_attached);
814 switch (cable_type) {
815 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
816
817
818
819
820
821
822
823
824
825
826
827
828
829 extcon_set_state_sync(info->edev, EXTCON_USB,
830 attached);
831 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
832 attached);
833
834 if (!cable_attached)
835 extcon_set_state_sync(info->edev, EXTCON_DOCK,
836 cable_attached);
837 break;
838 case MAX77693_MUIC_ADC_RESERVED_ACC_3:
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859 ret = max77693_muic_set_path(info, info->path_usb,
860 attached);
861 if (ret < 0)
862 return ret;
863
864 extcon_set_state_sync(info->edev, EXTCON_DOCK,
865 attached);
866 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
867 attached);
868 break;
869 }
870
871
872 switch (chg_type) {
873 case MAX77693_CHARGER_TYPE_NONE:
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892 break;
893 case MAX77693_CHARGER_TYPE_USB:
894
895 ret = max77693_muic_set_path(info, info->path_usb,
896 attached);
897 if (ret < 0)
898 return ret;
899
900 extcon_set_state_sync(info->edev, EXTCON_USB,
901 attached);
902 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
903 attached);
904 break;
905 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
906
907 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
908 attached);
909 break;
910 }
911 break;
912 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
913 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
914 attached);
915 break;
916 case MAX77693_CHARGER_TYPE_APPLE_500MA:
917 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
918 attached);
919 break;
920 case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
921 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
922 attached);
923 break;
924 case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
925 break;
926 default:
927 dev_err(info->dev,
928 "failed to detect %s accessory (chg_type:0x%x)\n",
929 attached ? "attached" : "detached", chg_type);
930 return -EINVAL;
931 }
932
933 return 0;
934}
935
936static void max77693_muic_irq_work(struct work_struct *work)
937{
938 struct max77693_muic_info *info = container_of(work,
939 struct max77693_muic_info, irq_work);
940 int irq_type = -1;
941 int i, ret = 0;
942
943 if (!info->edev)
944 return;
945
946 mutex_lock(&info->mutex);
947
948 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
949 if (info->irq == muic_irqs[i].virq)
950 irq_type = muic_irqs[i].irq;
951
952 ret = regmap_bulk_read(info->max77693->regmap_muic,
953 MAX77693_MUIC_REG_STATUS1, info->status, 2);
954 if (ret) {
955 dev_err(info->dev, "failed to read MUIC register\n");
956 mutex_unlock(&info->mutex);
957 return;
958 }
959
960 switch (irq_type) {
961 case MAX77693_MUIC_IRQ_INT1_ADC:
962 case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
963 case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
964 case MAX77693_MUIC_IRQ_INT1_ADC1K:
965
966
967
968
969 ret = max77693_muic_adc_handler(info);
970 break;
971 case MAX77693_MUIC_IRQ_INT2_CHGTYP:
972 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
973 case MAX77693_MUIC_IRQ_INT2_DCDTMR:
974 case MAX77693_MUIC_IRQ_INT2_DXOVP:
975 case MAX77693_MUIC_IRQ_INT2_VBVOLT:
976 case MAX77693_MUIC_IRQ_INT2_VIDRM:
977
978 ret = max77693_muic_chg_handler(info);
979 break;
980 case MAX77693_MUIC_IRQ_INT3_EOC:
981 case MAX77693_MUIC_IRQ_INT3_CGMBC:
982 case MAX77693_MUIC_IRQ_INT3_OVP:
983 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
984 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
985 case MAX77693_MUIC_IRQ_INT3_BAT_DET:
986 break;
987 default:
988 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
989 irq_type);
990 mutex_unlock(&info->mutex);
991 return;
992 }
993
994 if (ret < 0)
995 dev_err(info->dev, "failed to handle MUIC interrupt\n");
996
997 mutex_unlock(&info->mutex);
998}
999
1000static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1001{
1002 struct max77693_muic_info *info = data;
1003
1004 info->irq = irq;
1005 schedule_work(&info->irq_work);
1006
1007 return IRQ_HANDLED;
1008}
1009
1010static const struct regmap_config max77693_muic_regmap_config = {
1011 .reg_bits = 8,
1012 .val_bits = 8,
1013};
1014
1015static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1016{
1017 int ret = 0;
1018 int adc;
1019 int chg_type;
1020 bool attached;
1021
1022 mutex_lock(&info->mutex);
1023
1024
1025 ret = regmap_bulk_read(info->max77693->regmap_muic,
1026 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1027 if (ret) {
1028 dev_err(info->dev, "failed to read MUIC register\n");
1029 mutex_unlock(&info->mutex);
1030 return ret;
1031 }
1032
1033 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1034 &attached);
1035 if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1036 ret = max77693_muic_adc_handler(info);
1037 if (ret < 0) {
1038 dev_err(info->dev, "Cannot detect accessory\n");
1039 mutex_unlock(&info->mutex);
1040 return ret;
1041 }
1042 }
1043
1044 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1045 &attached);
1046 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1047 ret = max77693_muic_chg_handler(info);
1048 if (ret < 0) {
1049 dev_err(info->dev, "Cannot detect charger accessory\n");
1050 mutex_unlock(&info->mutex);
1051 return ret;
1052 }
1053 }
1054
1055 mutex_unlock(&info->mutex);
1056
1057 return 0;
1058}
1059
1060static void max77693_muic_detect_cable_wq(struct work_struct *work)
1061{
1062 struct max77693_muic_info *info = container_of(to_delayed_work(work),
1063 struct max77693_muic_info, wq_detcable);
1064
1065 max77693_muic_detect_accessory(info);
1066}
1067
1068static int max77693_muic_probe(struct platform_device *pdev)
1069{
1070 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1071 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1072 struct max77693_muic_info *info;
1073 struct max77693_reg_data *init_data;
1074 int num_init_data;
1075 int delay_jiffies;
1076 int cable_type;
1077 bool attached;
1078 int ret;
1079 int i;
1080 unsigned int id;
1081
1082 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1083 GFP_KERNEL);
1084 if (!info)
1085 return -ENOMEM;
1086
1087 info->dev = &pdev->dev;
1088 info->max77693 = max77693;
1089 if (info->max77693->regmap_muic) {
1090 dev_dbg(&pdev->dev, "allocate register map\n");
1091 } else {
1092 info->max77693->regmap_muic = devm_regmap_init_i2c(
1093 info->max77693->i2c_muic,
1094 &max77693_muic_regmap_config);
1095 if (IS_ERR(info->max77693->regmap_muic)) {
1096 ret = PTR_ERR(info->max77693->regmap_muic);
1097 dev_err(max77693->dev,
1098 "failed to allocate register map: %d\n", ret);
1099 return ret;
1100 }
1101 }
1102
1103
1104 info->dock = devm_input_allocate_device(&pdev->dev);
1105 if (!info->dock) {
1106 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1107 return -ENOMEM;
1108 }
1109 info->dock->name = "max77693-muic/dock";
1110 info->dock->phys = "max77693-muic/extcon";
1111 info->dock->dev.parent = &pdev->dev;
1112
1113 __set_bit(EV_REP, info->dock->evbit);
1114
1115 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1116 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1117 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1118 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1119 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1120
1121 ret = input_register_device(info->dock);
1122 if (ret < 0) {
1123 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1124 ret);
1125 return ret;
1126 }
1127
1128 platform_set_drvdata(pdev, info);
1129 mutex_init(&info->mutex);
1130
1131 ret = devm_work_autocancel(&pdev->dev, &info->irq_work,
1132 max77693_muic_irq_work);
1133 if (ret)
1134 return ret;
1135
1136
1137 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1138 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1139 int virq;
1140
1141 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1142 muic_irq->irq);
1143 if (virq <= 0)
1144 return -EINVAL;
1145 muic_irq->virq = virq;
1146
1147 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1148 max77693_muic_irq_handler,
1149 IRQF_NO_SUSPEND,
1150 muic_irq->name, info);
1151 if (ret) {
1152 dev_err(&pdev->dev,
1153 "failed: irq request (IRQ: %d, error :%d)\n",
1154 muic_irq->irq, ret);
1155 return ret;
1156 }
1157 }
1158
1159
1160 info->edev = devm_extcon_dev_allocate(&pdev->dev,
1161 max77693_extcon_cable);
1162 if (IS_ERR(info->edev)) {
1163 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1164 return PTR_ERR(info->edev);
1165 }
1166
1167 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1168 if (ret) {
1169 dev_err(&pdev->dev, "failed to register extcon device\n");
1170 return ret;
1171 }
1172
1173
1174 if (pdata && pdata->muic_data) {
1175 init_data = pdata->muic_data->init_data;
1176 num_init_data = pdata->muic_data->num_init_data;
1177 } else {
1178 init_data = default_init_data;
1179 num_init_data = ARRAY_SIZE(default_init_data);
1180 }
1181
1182 for (i = 0; i < num_init_data; i++) {
1183 regmap_write(info->max77693->regmap_muic,
1184 init_data[i].addr,
1185 init_data[i].data);
1186 }
1187
1188 if (pdata && pdata->muic_data) {
1189 struct max77693_muic_platform_data *muic_pdata
1190 = pdata->muic_data;
1191
1192
1193
1194
1195
1196 if (muic_pdata->path_uart)
1197 info->path_uart = muic_pdata->path_uart;
1198 else
1199 info->path_uart = MAX77693_CONTROL1_SW_UART;
1200
1201 if (muic_pdata->path_usb)
1202 info->path_usb = muic_pdata->path_usb;
1203 else
1204 info->path_usb = MAX77693_CONTROL1_SW_USB;
1205
1206
1207
1208
1209
1210 if (muic_pdata->detcable_delay_ms)
1211 delay_jiffies =
1212 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1213 else
1214 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1215 } else {
1216 info->path_usb = MAX77693_CONTROL1_SW_USB;
1217 info->path_uart = MAX77693_CONTROL1_SW_UART;
1218 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1219 }
1220
1221
1222 ret = regmap_bulk_read(info->max77693->regmap_muic,
1223 MAX77693_MUIC_REG_STATUS1, info->status, 2);
1224 if (ret) {
1225 dev_err(info->dev, "failed to read MUIC register\n");
1226 return ret;
1227 }
1228 cable_type = max77693_muic_get_cable_type(info,
1229 MAX77693_CABLE_GROUP_ADC, &attached);
1230 if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON ||
1231 cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF))
1232 max77693_muic_set_path(info, info->path_uart, true);
1233
1234
1235 ret = regmap_read(info->max77693->regmap_muic,
1236 MAX77693_MUIC_REG_ID, &id);
1237 if (ret < 0) {
1238 dev_err(&pdev->dev, "failed to read revision number\n");
1239 return ret;
1240 }
1241 dev_info(info->dev, "device ID : 0x%x\n", id);
1242
1243
1244 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1255 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1256 delay_jiffies);
1257
1258 return ret;
1259}
1260
1261static struct platform_driver max77693_muic_driver = {
1262 .driver = {
1263 .name = DEV_NAME,
1264 },
1265 .probe = max77693_muic_probe,
1266};
1267
1268module_platform_driver(max77693_muic_driver);
1269
1270MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1271MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1272MODULE_LICENSE("GPL");
1273MODULE_ALIAS("platform:max77693-muic");
1274