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1// SPDX-License-Identifier: GPL-2.0+
2//
3// extcon-max77843.c - Maxim MAX77843 extcon driver to support
4// MUIC(Micro USB Interface Controller)
5//
6// Copyright (C) 2015 Samsung Electronics
7// Author: Jaewon Kim <[email protected]>
8
9#include <linux/extcon-provider.h>
10#include <linux/i2c.h>
11#include <linux/interrupt.h>
12#include <linux/kernel.h>
13#include <linux/mfd/max77693-common.h>
14#include <linux/mfd/max77843-private.h>
15#include <linux/module.h>
16#include <linux/platform_device.h>
17#include <linux/workqueue.h>
18
19#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */
20
21enum max77843_muic_status {
22 MAX77843_MUIC_STATUS1 = 0,
23 MAX77843_MUIC_STATUS2,
24 MAX77843_MUIC_STATUS3,
25
26 MAX77843_MUIC_STATUS_NUM,
27};
28
29struct max77843_muic_info {
30 struct device *dev;
31 struct max77693_dev *max77843;
32 struct extcon_dev *edev;
33
34 struct mutex mutex;
35 struct work_struct irq_work;
36 struct delayed_work wq_detcable;
37
38 u8 status[MAX77843_MUIC_STATUS_NUM];
39 int prev_cable_type;
40 int prev_chg_type;
41 int prev_gnd_type;
42
43 bool irq_adc;
44 bool irq_chg;
45};
46
47enum max77843_muic_cable_group {
48 MAX77843_CABLE_GROUP_ADC = 0,
49 MAX77843_CABLE_GROUP_ADC_GND,
50 MAX77843_CABLE_GROUP_CHG,
51};
52
53enum max77843_muic_adc_debounce_time {
54 MAX77843_DEBOUNCE_TIME_5MS = 0,
55 MAX77843_DEBOUNCE_TIME_10MS,
56 MAX77843_DEBOUNCE_TIME_25MS,
57 MAX77843_DEBOUNCE_TIME_38_62MS,
58};
59
60/* Define accessory cable type */
61enum max77843_muic_accessory_type {
62 MAX77843_MUIC_ADC_GROUND = 0,
63 MAX77843_MUIC_ADC_SEND_END_BUTTON,
64 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
65 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
66 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
67 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
68 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
69 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
70 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
71 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
72 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
73 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
74 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
75 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
76 MAX77843_MUIC_ADC_RESERVED_ACC_1,
77 MAX77843_MUIC_ADC_RESERVED_ACC_2,
78 MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */
79 MAX77843_MUIC_ADC_RESERVED_ACC_4,
80 MAX77843_MUIC_ADC_RESERVED_ACC_5,
81 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
82 MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
83 MAX77843_MUIC_ADC_TTY_CONVERTER,
84 MAX77843_MUIC_ADC_UART_CABLE,
85 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
86 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
87 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
88 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
89 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
90 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
91 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
92 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
93 MAX77843_MUIC_ADC_OPEN,
94
95 /*
96 * The below accessories should check
97 * not only ADC value but also ADC1K and VBVolt value.
98 */
99 /* Offset|ADC1K|VBVolt| */
100 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */
101 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */
102 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */
103 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */
104};
105
106/* Define charger cable type */
107enum max77843_muic_charger_type {
108 MAX77843_MUIC_CHG_NONE = 0,
109 MAX77843_MUIC_CHG_USB,
110 MAX77843_MUIC_CHG_DOWNSTREAM,
111 MAX77843_MUIC_CHG_DEDICATED,
112 MAX77843_MUIC_CHG_SPECIAL_500MA,
113 MAX77843_MUIC_CHG_SPECIAL_1A,
114 MAX77843_MUIC_CHG_SPECIAL_BIAS,
115 MAX77843_MUIC_CHG_RESERVED,
116 MAX77843_MUIC_CHG_GND,
117 MAX77843_MUIC_CHG_DOCK,
118};
119
120static const unsigned int max77843_extcon_cable[] = {
121 EXTCON_USB,
122 EXTCON_USB_HOST,
123 EXTCON_CHG_USB_SDP,
124 EXTCON_CHG_USB_DCP,
125 EXTCON_CHG_USB_CDP,
126 EXTCON_CHG_USB_FAST,
127 EXTCON_CHG_USB_SLOW,
128 EXTCON_DISP_MHL,
129 EXTCON_DOCK,
130 EXTCON_JIG,
131 EXTCON_NONE,
132};
133
134struct max77843_muic_irq {
135 unsigned int irq;
136 const char *name;
137 unsigned int virq;
138};
139
140static struct max77843_muic_irq max77843_muic_irqs[] = {
141 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
142 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
143 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
144 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
145 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
146 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
147 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
148 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
149 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
150 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
151 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
152 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
153 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
154 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
155 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
156 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
157};
158
159static const struct regmap_config max77843_muic_regmap_config = {
160 .reg_bits = 8,
161 .val_bits = 8,
162 .max_register = MAX77843_MUIC_REG_END,
163};
164
165static const struct regmap_irq max77843_muic_irq[] = {
166 /* INT1 interrupt */
167 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
168 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
169 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
170
171 /* INT2 interrupt */
172 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
173 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
174 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
175 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
176 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
177
178 /* INT3 interrupt */
179 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
180 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
181 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
182 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
183 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
184 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
185 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
186 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
187};
188
189static const struct regmap_irq_chip max77843_muic_irq_chip = {
190 .name = "max77843-muic",
191 .status_base = MAX77843_MUIC_REG_INT1,
192 .unmask_base = MAX77843_MUIC_REG_INTMASK1,
193 .num_regs = 3,
194 .irqs = max77843_muic_irq,
195 .num_irqs = ARRAY_SIZE(max77843_muic_irq),
196};
197
198static int max77843_muic_set_path(struct max77843_muic_info *info,
199 u8 val, bool attached, bool nobccomp)
200{
201 struct max77693_dev *max77843 = info->max77843;
202 int ret = 0;
203 unsigned int ctrl1, ctrl2;
204
205 if (attached)
206 ctrl1 = val;
207 else
208 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
209 if (nobccomp) {
210 /* Disable BC1.2 protocol and force manual switch control */
211 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;
212 }
213
214 ret = regmap_update_bits(max77843->regmap_muic,
215 MAX77843_MUIC_REG_CONTROL1,
216 MAX77843_MUIC_CONTROL1_COM_SW |
217 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,
218 ctrl1);
219 if (ret < 0) {
220 dev_err(info->dev, "Cannot switch MUIC port\n");
221 return ret;
222 }
223
224 if (attached)
225 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
226 else
227 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
228
229 ret = regmap_update_bits(max77843->regmap_muic,
230 MAX77843_MUIC_REG_CONTROL2,
231 MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
232 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
233 if (ret < 0) {
234 dev_err(info->dev, "Cannot update lowpower mode\n");
235 return ret;
236 }
237
238 dev_dbg(info->dev,
239 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
240 ctrl1, ctrl2, attached ? "attached" : "detached");
241
242 return 0;
243}
244
245static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,
246 bool on)
247{
248 struct max77693_dev *max77843 = info->max77843;
249 unsigned int cnfg00;
250
251 if (on)
252 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;
253 else
254 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;
255
256 regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,
257 MAX77843_CHG_MODE_MASK, cnfg00);
258}
259
260static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
261 enum max77843_muic_cable_group group, bool *attached)
262{
263 int adc, chg_type, cable_type, gnd_type;
264
265 adc = info->status[MAX77843_MUIC_STATUS1] &
266 MAX77843_MUIC_STATUS1_ADC_MASK;
267 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
268
269 switch (group) {
270 case MAX77843_CABLE_GROUP_ADC:
271 if (adc == MAX77843_MUIC_ADC_OPEN) {
272 *attached = false;
273 cable_type = info->prev_cable_type;
274 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
275 } else {
276 *attached = true;
277 cable_type = info->prev_cable_type = adc;
278 }
279 break;
280 case MAX77843_CABLE_GROUP_CHG:
281 chg_type = info->status[MAX77843_MUIC_STATUS2] &
282 MAX77843_MUIC_STATUS2_CHGTYP_MASK;
283
284 /* Check GROUND accessory with charger cable */
285 if (adc == MAX77843_MUIC_ADC_GROUND) {
286 if (chg_type == MAX77843_MUIC_CHG_NONE) {
287 /*
288 * The following state when charger cable is
289 * disconnected but the GROUND accessory still
290 * connected.
291 */
292 *attached = false;
293 cable_type = info->prev_chg_type;
294 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
295 } else {
296
297 /*
298 * The following state when charger cable is
299 * connected on the GROUND accessory.
300 */
301 *attached = true;
302 cable_type = MAX77843_MUIC_CHG_GND;
303 info->prev_chg_type = MAX77843_MUIC_CHG_GND;
304 }
305 break;
306 }
307
308 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */
309 if (chg_type == MAX77843_MUIC_CHG_NONE) {
310 *attached = false;
311 cable_type = info->prev_chg_type;
312 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
313 } else {
314 *attached = true;
315 cable_type = MAX77843_MUIC_CHG_DOCK;
316 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;
317 }
318 break;
319 }
320
321 if (chg_type == MAX77843_MUIC_CHG_NONE) {
322 *attached = false;
323 cable_type = info->prev_chg_type;
324 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
325 } else {
326 *attached = true;
327 cable_type = info->prev_chg_type = chg_type;
328 }
329 break;
330 case MAX77843_CABLE_GROUP_ADC_GND:
331 if (adc == MAX77843_MUIC_ADC_OPEN) {
332 *attached = false;
333 cable_type = info->prev_gnd_type;
334 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
335 } else {
336 *attached = true;
337
338 /*
339 * Offset|ADC1K|VBVolt|
340 * 0x1| 0| 0| USB-HOST
341 * 0x1| 0| 1| USB-HOST with VB
342 * 0x1| 1| 0| MHL
343 * 0x1| 1| 1| MHL with VB
344 */
345 /* Get ADC1K register bit */
346 gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
347 MAX77843_MUIC_STATUS1_ADC1K_MASK);
348
349 /* Get VBVolt register bit */
350 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
351 MAX77843_MUIC_STATUS2_VBVOLT_MASK);
352 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
353
354 /* Offset of GND cable */
355 gnd_type |= MAX77843_MUIC_GND_USB_HOST;
356 cable_type = info->prev_gnd_type = gnd_type;
357 }
358 break;
359 default:
360 dev_err(info->dev, "Unknown cable group (%d)\n", group);
361 cable_type = -EINVAL;
362 break;
363 }
364
365 return cable_type;
366}
367
368static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
369{
370 int ret, gnd_cable_type;
371 bool attached;
372
373 gnd_cable_type = max77843_muic_get_cable_type(info,
374 MAX77843_CABLE_GROUP_ADC_GND, &attached);
375 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
376 attached ? "attached" : "detached", gnd_cable_type);
377
378 switch (gnd_cable_type) {
379 case MAX77843_MUIC_GND_USB_HOST:
380 case MAX77843_MUIC_GND_USB_HOST_VB:
381 ret = max77843_muic_set_path(info,
382 MAX77843_MUIC_CONTROL1_SW_USB,
383 attached, false);
384 if (ret < 0)
385 return ret;
386
387 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
388 max77843_charger_set_otg_vbus(info, attached);
389 break;
390 case MAX77843_MUIC_GND_MHL_VB:
391 case MAX77843_MUIC_GND_MHL:
392 ret = max77843_muic_set_path(info,
393 MAX77843_MUIC_CONTROL1_SW_OPEN,
394 attached, false);
395 if (ret < 0)
396 return ret;
397
398 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
399 break;
400 default:
401 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
402 attached ? "attached" : "detached", gnd_cable_type);
403 return -EINVAL;
404 }
405
406 return 0;
407}
408
409static int max77843_muic_jig_handler(struct max77843_muic_info *info,
410 int cable_type, bool attached)
411{
412 int ret;
413 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
414
415 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
416 attached ? "attached" : "detached", cable_type);
417
418 switch (cable_type) {
419 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
420 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
421 path = MAX77843_MUIC_CONTROL1_SW_USB;
422 break;
423 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
424 path = MAX77843_MUIC_CONTROL1_SW_UART;
425 break;
426 default:
427 return -EINVAL;
428 }
429
430 ret = max77843_muic_set_path(info, path, attached, false);
431 if (ret < 0)
432 return ret;
433
434 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
435
436 return 0;
437}
438
439static int max77843_muic_dock_handler(struct max77843_muic_info *info,
440 bool attached)
441{
442 int ret;
443
444 dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",
445 attached ? "attached" : "detached");
446
447 ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,
448 attached, attached);
449 if (ret < 0)
450 return ret;
451
452 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
453 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
454 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
455
456 return 0;
457}
458
459static int max77843_muic_adc_handler(struct max77843_muic_info *info)
460{
461 int ret, cable_type;
462 bool attached;
463
464 cable_type = max77843_muic_get_cable_type(info,
465 MAX77843_CABLE_GROUP_ADC, &attached);
466
467 dev_dbg(info->dev,
468 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
469 attached ? "attached" : "detached", cable_type,
470 info->prev_cable_type);
471
472 switch (cable_type) {
473 case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */
474 ret = max77843_muic_dock_handler(info, attached);
475 if (ret < 0)
476 return ret;
477 break;
478 case MAX77843_MUIC_ADC_GROUND:
479 ret = max77843_muic_adc_gnd_handler(info);
480 if (ret < 0)
481 return ret;
482 break;
483 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
484 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
485 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
486 ret = max77843_muic_jig_handler(info, cable_type, attached);
487 if (ret < 0)
488 return ret;
489 break;
490 case MAX77843_MUIC_ADC_SEND_END_BUTTON:
491 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
492 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
493 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
494 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
495 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
496 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
497 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
498 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
499 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
500 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
501 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
502 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
503 case MAX77843_MUIC_ADC_RESERVED_ACC_1:
504 case MAX77843_MUIC_ADC_RESERVED_ACC_2:
505 case MAX77843_MUIC_ADC_RESERVED_ACC_4:
506 case MAX77843_MUIC_ADC_RESERVED_ACC_5:
507 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
508 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
509 case MAX77843_MUIC_ADC_TTY_CONVERTER:
510 case MAX77843_MUIC_ADC_UART_CABLE:
511 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
512 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
513 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
514 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
515 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
516 case MAX77843_MUIC_ADC_OPEN:
517 dev_err(info->dev,
518 "accessory is %s but it isn't used (adc:0x%x)\n",
519 attached ? "attached" : "detached", cable_type);
520 return -EAGAIN;
521 default:
522 dev_err(info->dev,
523 "failed to detect %s accessory (adc:0x%x)\n",
524 attached ? "attached" : "detached", cable_type);
525 return -EINVAL;
526 }
527
528 return 0;
529}
530
531static int max77843_muic_chg_handler(struct max77843_muic_info *info)
532{
533 int ret, chg_type, gnd_type;
534 bool attached;
535
536 chg_type = max77843_muic_get_cable_type(info,
537 MAX77843_CABLE_GROUP_CHG, &attached);
538
539 dev_dbg(info->dev,
540 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
541 attached ? "attached" : "detached",
542 chg_type, info->prev_chg_type);
543
544 switch (chg_type) {
545 case MAX77843_MUIC_CHG_USB:
546 ret = max77843_muic_set_path(info,
547 MAX77843_MUIC_CONTROL1_SW_USB,
548 attached, false);
549 if (ret < 0)
550 return ret;
551
552 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
553 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
554 attached);
555 break;
556 case MAX77843_MUIC_CHG_DOWNSTREAM:
557 ret = max77843_muic_set_path(info,
558 MAX77843_MUIC_CONTROL1_SW_OPEN,
559 attached, false);
560 if (ret < 0)
561 return ret;
562
563 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
564 attached);
565 break;
566 case MAX77843_MUIC_CHG_DEDICATED:
567 ret = max77843_muic_set_path(info,
568 MAX77843_MUIC_CONTROL1_SW_OPEN,
569 attached, false);
570 if (ret < 0)
571 return ret;
572
573 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
574 attached);
575 break;
576 case MAX77843_MUIC_CHG_SPECIAL_500MA:
577 ret = max77843_muic_set_path(info,
578 MAX77843_MUIC_CONTROL1_SW_OPEN,
579 attached, false);
580 if (ret < 0)
581 return ret;
582
583 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
584 attached);
585 break;
586 case MAX77843_MUIC_CHG_SPECIAL_1A:
587 ret = max77843_muic_set_path(info,
588 MAX77843_MUIC_CONTROL1_SW_OPEN,
589 attached, false);
590 if (ret < 0)
591 return ret;
592
593 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
594 attached);
595 break;
596 case MAX77843_MUIC_CHG_GND:
597 gnd_type = max77843_muic_get_cable_type(info,
598 MAX77843_CABLE_GROUP_ADC_GND, &attached);
599
600 /* Charger cable on MHL accessory is attach or detach */
601 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
602 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
603 true);
604 else if (gnd_type == MAX77843_MUIC_GND_MHL)
605 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
606 false);
607 break;
608 case MAX77843_MUIC_CHG_DOCK:
609 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
610 break;
611 case MAX77843_MUIC_CHG_NONE:
612 break;
613 default:
614 dev_err(info->dev,
615 "failed to detect %s accessory (chg_type:0x%x)\n",
616 attached ? "attached" : "detached", chg_type);
617
618 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
619 attached, false);
620 return -EINVAL;
621 }
622
623 return 0;
624}
625
626static void max77843_muic_irq_work(struct work_struct *work)
627{
628 struct max77843_muic_info *info = container_of(work,
629 struct max77843_muic_info, irq_work);
630 struct max77693_dev *max77843 = info->max77843;
631 int ret = 0;
632
633 mutex_lock(&info->mutex);
634
635 ret = regmap_bulk_read(max77843->regmap_muic,
636 MAX77843_MUIC_REG_STATUS1, info->status,
637 MAX77843_MUIC_STATUS_NUM);
638 if (ret) {
639 dev_err(info->dev, "Cannot read STATUS registers\n");
640 mutex_unlock(&info->mutex);
641 return;
642 }
643
644 if (info->irq_adc) {
645 ret = max77843_muic_adc_handler(info);
646 if (ret)
647 dev_err(info->dev, "Unknown cable type\n");
648 info->irq_adc = false;
649 }
650
651 if (info->irq_chg) {
652 ret = max77843_muic_chg_handler(info);
653 if (ret)
654 dev_err(info->dev, "Unknown charger type\n");
655 info->irq_chg = false;
656 }
657
658 mutex_unlock(&info->mutex);
659}
660
661static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
662{
663 struct max77843_muic_info *info = data;
664 int i, irq_type = -1;
665
666 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
667 if (irq == max77843_muic_irqs[i].virq)
668 irq_type = max77843_muic_irqs[i].irq;
669
670 switch (irq_type) {
671 case MAX77843_MUIC_IRQ_INT1_ADC:
672 case MAX77843_MUIC_IRQ_INT1_ADCERROR:
673 case MAX77843_MUIC_IRQ_INT1_ADC1K:
674 info->irq_adc = true;
675 break;
676 case MAX77843_MUIC_IRQ_INT2_CHGTYP:
677 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
678 case MAX77843_MUIC_IRQ_INT2_DCDTMR:
679 case MAX77843_MUIC_IRQ_INT2_DXOVP:
680 case MAX77843_MUIC_IRQ_INT2_VBVOLT:
681 info->irq_chg = true;
682 break;
683 case MAX77843_MUIC_IRQ_INT3_VBADC:
684 case MAX77843_MUIC_IRQ_INT3_VDNMON:
685 case MAX77843_MUIC_IRQ_INT3_DNRES:
686 case MAX77843_MUIC_IRQ_INT3_MPNACK:
687 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
688 case MAX77843_MUIC_IRQ_INT3_MRXTRF:
689 case MAX77843_MUIC_IRQ_INT3_MRXPERR:
690 case MAX77843_MUIC_IRQ_INT3_MRXRDY:
691 break;
692 default:
693 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
694 break;
695 }
696
697 schedule_work(&info->irq_work);
698
699 return IRQ_HANDLED;
700}
701
702static void max77843_muic_detect_cable_wq(struct work_struct *work)
703{
704 struct max77843_muic_info *info = container_of(to_delayed_work(work),
705 struct max77843_muic_info, wq_detcable);
706 struct max77693_dev *max77843 = info->max77843;
707 int chg_type, adc, ret;
708 bool attached;
709
710 mutex_lock(&info->mutex);
711
712 ret = regmap_bulk_read(max77843->regmap_muic,
713 MAX77843_MUIC_REG_STATUS1, info->status,
714 MAX77843_MUIC_STATUS_NUM);
715 if (ret) {
716 dev_err(info->dev, "Cannot read STATUS registers\n");
717 goto err_cable_wq;
718 }
719
720 adc = max77843_muic_get_cable_type(info,
721 MAX77843_CABLE_GROUP_ADC, &attached);
722 if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
723 ret = max77843_muic_adc_handler(info);
724 if (ret < 0) {
725 dev_err(info->dev, "Cannot detect accessory\n");
726 goto err_cable_wq;
727 }
728 }
729
730 chg_type = max77843_muic_get_cable_type(info,
731 MAX77843_CABLE_GROUP_CHG, &attached);
732 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
733 ret = max77843_muic_chg_handler(info);
734 if (ret < 0) {
735 dev_err(info->dev, "Cannot detect charger accessory\n");
736 goto err_cable_wq;
737 }
738 }
739
740err_cable_wq:
741 mutex_unlock(&info->mutex);
742}
743
744static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
745 enum max77843_muic_adc_debounce_time time)
746{
747 struct max77693_dev *max77843 = info->max77843;
748 int ret;
749
750 switch (time) {
751 case MAX77843_DEBOUNCE_TIME_5MS:
752 case MAX77843_DEBOUNCE_TIME_10MS:
753 case MAX77843_DEBOUNCE_TIME_25MS:
754 case MAX77843_DEBOUNCE_TIME_38_62MS:
755 ret = regmap_update_bits(max77843->regmap_muic,
756 MAX77843_MUIC_REG_CONTROL4,
757 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
758 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
759 if (ret < 0) {
760 dev_err(info->dev, "Cannot write MUIC regmap\n");
761 return ret;
762 }
763 break;
764 default:
765 dev_err(info->dev, "Invalid ADC debounce time\n");
766 return -EINVAL;
767 }
768
769 return 0;
770}
771
772static int max77843_init_muic_regmap(struct max77693_dev *max77843)
773{
774 int ret;
775
776 max77843->i2c_muic = i2c_new_dummy_device(max77843->i2c->adapter,
777 I2C_ADDR_MUIC);
778 if (IS_ERR(max77843->i2c_muic)) {
779 dev_err(&max77843->i2c->dev,
780 "Cannot allocate I2C device for MUIC\n");
781 return PTR_ERR(max77843->i2c_muic);
782 }
783
784 i2c_set_clientdata(max77843->i2c_muic, max77843);
785
786 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
787 &max77843_muic_regmap_config);
788 if (IS_ERR(max77843->regmap_muic)) {
789 ret = PTR_ERR(max77843->regmap_muic);
790 goto err_muic_i2c;
791 }
792
793 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
794 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
795 0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
796 if (ret < 0) {
797 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
798 goto err_muic_i2c;
799 }
800
801 return 0;
802
803err_muic_i2c:
804 i2c_unregister_device(max77843->i2c_muic);
805
806 return ret;
807}
808
809static int max77843_muic_probe(struct platform_device *pdev)
810{
811 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
812 struct max77843_muic_info *info;
813 unsigned int id;
814 int cable_type;
815 bool attached;
816 int i, ret;
817
818 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
819 if (!info)
820 return -ENOMEM;
821
822 info->dev = &pdev->dev;
823 info->max77843 = max77843;
824
825 platform_set_drvdata(pdev, info);
826 mutex_init(&info->mutex);
827
828 /* Initialize i2c and regmap */
829 ret = max77843_init_muic_regmap(max77843);
830 if (ret) {
831 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
832 return ret;
833 }
834
835 /* Turn off auto detection configuration */
836 ret = regmap_update_bits(max77843->regmap_muic,
837 MAX77843_MUIC_REG_CONTROL4,
838 MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
839 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
840 CONTROL4_AUTO_DISABLE);
841
842 /* Initialize extcon device */
843 info->edev = devm_extcon_dev_allocate(&pdev->dev,
844 max77843_extcon_cable);
845 if (IS_ERR(info->edev)) {
846 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
847 ret = PTR_ERR(info->edev);
848 goto err_muic_irq;
849 }
850
851 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
852 if (ret) {
853 dev_err(&pdev->dev, "Failed to register extcon device\n");
854 goto err_muic_irq;
855 }
856
857 /* Set ADC debounce time */
858 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
859
860 /* Set initial path for UART when JIG is connected to get serial logs */
861 ret = regmap_bulk_read(max77843->regmap_muic,
862 MAX77843_MUIC_REG_STATUS1, info->status,
863 MAX77843_MUIC_STATUS_NUM);
864 if (ret) {
865 dev_err(info->dev, "Cannot read STATUS registers\n");
866 goto err_muic_irq;
867 }
868 cable_type = max77843_muic_get_cable_type(info, MAX77843_CABLE_GROUP_ADC,
869 &attached);
870 if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF)
871 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART,
872 true, false);
873
874 /* Check revision number of MUIC device */
875 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
876 if (ret < 0) {
877 dev_err(&pdev->dev, "Failed to read revision number\n");
878 goto err_muic_irq;
879 }
880 dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
881
882 /* Support virtual irq domain for max77843 MUIC device */
883 INIT_WORK(&info->irq_work, max77843_muic_irq_work);
884
885 /* Clear IRQ bits before request IRQs */
886 ret = regmap_bulk_read(max77843->regmap_muic,
887 MAX77843_MUIC_REG_INT1, info->status,
888 MAX77843_MUIC_STATUS_NUM);
889 if (ret) {
890 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
891 goto err_muic_irq;
892 }
893
894 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
895 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
896 int virq = 0;
897
898 virq = regmap_irq_get_virq(max77843->irq_data_muic,
899 muic_irq->irq);
900 if (virq <= 0) {
901 ret = -EINVAL;
902 goto err_muic_irq;
903 }
904 muic_irq->virq = virq;
905
906 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
907 max77843_muic_irq_handler, IRQF_NO_SUSPEND,
908 muic_irq->name, info);
909 if (ret) {
910 dev_err(&pdev->dev,
911 "Failed to request irq (IRQ: %d, error: %d)\n",
912 muic_irq->irq, ret);
913 goto err_muic_irq;
914 }
915 }
916
917 /* Detect accessory after completing the initialization of platform */
918 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
919 queue_delayed_work(system_power_efficient_wq,
920 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
921
922 return 0;
923
924err_muic_irq:
925 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
926 i2c_unregister_device(max77843->i2c_muic);
927
928 return ret;
929}
930
931static void max77843_muic_remove(struct platform_device *pdev)
932{
933 struct max77843_muic_info *info = platform_get_drvdata(pdev);
934 struct max77693_dev *max77843 = info->max77843;
935
936 cancel_work_sync(&info->irq_work);
937 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
938 i2c_unregister_device(max77843->i2c_muic);
939}
940
941static const struct platform_device_id max77843_muic_id[] = {
942 { "max77843-muic", },
943 { /* sentinel */ },
944};
945MODULE_DEVICE_TABLE(platform, max77843_muic_id);
946
947static const struct of_device_id of_max77843_muic_dt_match[] = {
948 { .compatible = "maxim,max77843-muic", },
949 { /* sentinel */ },
950};
951MODULE_DEVICE_TABLE(of, of_max77843_muic_dt_match);
952
953static struct platform_driver max77843_muic_driver = {
954 .driver = {
955 .name = "max77843-muic",
956 .of_match_table = of_max77843_muic_dt_match,
957 },
958 .probe = max77843_muic_probe,
959 .remove = max77843_muic_remove,
960 .id_table = max77843_muic_id,
961};
962
963static int __init max77843_muic_init(void)
964{
965 return platform_driver_register(&max77843_muic_driver);
966}
967subsys_initcall(max77843_muic_init);
968
969MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
970MODULE_AUTHOR("Jaewon Kim <[email protected]>");
971MODULE_LICENSE("GPL");