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1/*
2 * extcon-max77843.c - Maxim MAX77843 extcon driver to support
3 * MUIC(Micro USB Interface Controller)
4 *
5 * Copyright (C) 2015 Samsung Electronics
6 * Author: Jaewon Kim <jaewon02.kim@samsung.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14#include <linux/extcon.h>
15#include <linux/i2c.h>
16#include <linux/interrupt.h>
17#include <linux/kernel.h>
18#include <linux/mfd/max77693-common.h>
19#include <linux/mfd/max77843-private.h>
20#include <linux/module.h>
21#include <linux/platform_device.h>
22#include <linux/workqueue.h>
23
24#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */
25
26enum max77843_muic_status {
27 MAX77843_MUIC_STATUS1 = 0,
28 MAX77843_MUIC_STATUS2,
29 MAX77843_MUIC_STATUS3,
30
31 MAX77843_MUIC_STATUS_NUM,
32};
33
34struct max77843_muic_info {
35 struct device *dev;
36 struct max77693_dev *max77843;
37 struct extcon_dev *edev;
38
39 struct mutex mutex;
40 struct work_struct irq_work;
41 struct delayed_work wq_detcable;
42
43 u8 status[MAX77843_MUIC_STATUS_NUM];
44 int prev_cable_type;
45 int prev_chg_type;
46 int prev_gnd_type;
47
48 bool irq_adc;
49 bool irq_chg;
50};
51
52enum max77843_muic_cable_group {
53 MAX77843_CABLE_GROUP_ADC = 0,
54 MAX77843_CABLE_GROUP_ADC_GND,
55 MAX77843_CABLE_GROUP_CHG,
56};
57
58enum max77843_muic_adc_debounce_time {
59 MAX77843_DEBOUNCE_TIME_5MS = 0,
60 MAX77843_DEBOUNCE_TIME_10MS,
61 MAX77843_DEBOUNCE_TIME_25MS,
62 MAX77843_DEBOUNCE_TIME_38_62MS,
63};
64
65/* Define accessory cable type */
66enum max77843_muic_accessory_type {
67 MAX77843_MUIC_ADC_GROUND = 0,
68 MAX77843_MUIC_ADC_SEND_END_BUTTON,
69 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
70 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
71 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
72 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
73 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
74 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
75 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
76 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
77 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
78 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
79 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
80 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
81 MAX77843_MUIC_ADC_RESERVED_ACC_1,
82 MAX77843_MUIC_ADC_RESERVED_ACC_2,
83 MAX77843_MUIC_ADC_RESERVED_ACC_3,
84 MAX77843_MUIC_ADC_RESERVED_ACC_4,
85 MAX77843_MUIC_ADC_RESERVED_ACC_5,
86 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
87 MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
88 MAX77843_MUIC_ADC_TTY_CONVERTER,
89 MAX77843_MUIC_ADC_UART_CABLE,
90 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
91 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
92 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
93 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
94 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
95 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
96 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
97 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
98 MAX77843_MUIC_ADC_OPEN,
99
100 /* The blow accessories should check
101 not only ADC value but also ADC1K and VBVolt value. */
102 /* Offset|ADC1K|VBVolt| */
103 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */
104 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */
105 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */
106 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */
107};
108
109/* Define charger cable type */
110enum max77843_muic_charger_type {
111 MAX77843_MUIC_CHG_NONE = 0,
112 MAX77843_MUIC_CHG_USB,
113 MAX77843_MUIC_CHG_DOWNSTREAM,
114 MAX77843_MUIC_CHG_DEDICATED,
115 MAX77843_MUIC_CHG_SPECIAL_500MA,
116 MAX77843_MUIC_CHG_SPECIAL_1A,
117 MAX77843_MUIC_CHG_SPECIAL_BIAS,
118 MAX77843_MUIC_CHG_RESERVED,
119 MAX77843_MUIC_CHG_GND,
120};
121
122static const unsigned int max77843_extcon_cable[] = {
123 EXTCON_USB,
124 EXTCON_USB_HOST,
125 EXTCON_CHG_USB_SDP,
126 EXTCON_CHG_USB_DCP,
127 EXTCON_CHG_USB_CDP,
128 EXTCON_CHG_USB_FAST,
129 EXTCON_CHG_USB_SLOW,
130 EXTCON_DISP_MHL,
131 EXTCON_JIG,
132 EXTCON_NONE,
133};
134
135struct max77843_muic_irq {
136 unsigned int irq;
137 const char *name;
138 unsigned int virq;
139};
140
141static struct max77843_muic_irq max77843_muic_irqs[] = {
142 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
143 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
144 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
145 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
146 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
147 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
148 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
149 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
150 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
151 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
152 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
153 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
154 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
155 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
156 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
157 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
158};
159
160static const struct regmap_config max77843_muic_regmap_config = {
161 .reg_bits = 8,
162 .val_bits = 8,
163 .max_register = MAX77843_MUIC_REG_END,
164};
165
166static const struct regmap_irq max77843_muic_irq[] = {
167 /* INT1 interrupt */
168 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
169 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
170 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
171
172 /* INT2 interrupt */
173 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
174 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
175 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
176 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
177 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
178
179 /* INT3 interrupt */
180 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
181 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
182 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
183 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
184 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
185 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
186 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
187 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
188};
189
190static const struct regmap_irq_chip max77843_muic_irq_chip = {
191 .name = "max77843-muic",
192 .status_base = MAX77843_MUIC_REG_INT1,
193 .mask_base = MAX77843_MUIC_REG_INTMASK1,
194 .mask_invert = true,
195 .num_regs = 3,
196 .irqs = max77843_muic_irq,
197 .num_irqs = ARRAY_SIZE(max77843_muic_irq),
198};
199
200static int max77843_muic_set_path(struct max77843_muic_info *info,
201 u8 val, bool attached)
202{
203 struct max77693_dev *max77843 = info->max77843;
204 int ret = 0;
205 unsigned int ctrl1, ctrl2;
206
207 if (attached)
208 ctrl1 = val;
209 else
210 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
211
212 ret = regmap_update_bits(max77843->regmap_muic,
213 MAX77843_MUIC_REG_CONTROL1,
214 MAX77843_MUIC_CONTROL1_COM_SW, ctrl1);
215 if (ret < 0) {
216 dev_err(info->dev, "Cannot switch MUIC port\n");
217 return ret;
218 }
219
220 if (attached)
221 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
222 else
223 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
224
225 ret = regmap_update_bits(max77843->regmap_muic,
226 MAX77843_MUIC_REG_CONTROL2,
227 MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
228 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
229 if (ret < 0) {
230 dev_err(info->dev, "Cannot update lowpower mode\n");
231 return ret;
232 }
233
234 dev_dbg(info->dev,
235 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
236 ctrl1, ctrl2, attached ? "attached" : "detached");
237
238 return 0;
239}
240
241static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
242 enum max77843_muic_cable_group group, bool *attached)
243{
244 int adc, chg_type, cable_type, gnd_type;
245
246 adc = info->status[MAX77843_MUIC_STATUS1] &
247 MAX77843_MUIC_STATUS1_ADC_MASK;
248 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
249
250 switch (group) {
251 case MAX77843_CABLE_GROUP_ADC:
252 if (adc == MAX77843_MUIC_ADC_OPEN) {
253 *attached = false;
254 cable_type = info->prev_cable_type;
255 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
256 } else {
257 *attached = true;
258 cable_type = info->prev_cable_type = adc;
259 }
260 break;
261 case MAX77843_CABLE_GROUP_CHG:
262 chg_type = info->status[MAX77843_MUIC_STATUS2] &
263 MAX77843_MUIC_STATUS2_CHGTYP_MASK;
264
265 /* Check GROUND accessory with charger cable */
266 if (adc == MAX77843_MUIC_ADC_GROUND) {
267 if (chg_type == MAX77843_MUIC_CHG_NONE) {
268 /* The following state when charger cable is
269 * disconnected but the GROUND accessory still
270 * connected */
271 *attached = false;
272 cable_type = info->prev_chg_type;
273 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
274 } else {
275
276 /* The following state when charger cable is
277 * connected on the GROUND accessory */
278 *attached = true;
279 cable_type = MAX77843_MUIC_CHG_GND;
280 info->prev_chg_type = MAX77843_MUIC_CHG_GND;
281 }
282 break;
283 }
284
285 if (chg_type == MAX77843_MUIC_CHG_NONE) {
286 *attached = false;
287 cable_type = info->prev_chg_type;
288 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
289 } else {
290 *attached = true;
291 cable_type = info->prev_chg_type = chg_type;
292 }
293 break;
294 case MAX77843_CABLE_GROUP_ADC_GND:
295 if (adc == MAX77843_MUIC_ADC_OPEN) {
296 *attached = false;
297 cable_type = info->prev_gnd_type;
298 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
299 } else {
300 *attached = true;
301
302 /* Offset|ADC1K|VBVolt|
303 * 0x1| 0| 0| USB-HOST
304 * 0x1| 0| 1| USB-HOST with VB
305 * 0x1| 1| 0| MHL
306 * 0x1| 1| 1| MHL with VB */
307 /* Get ADC1K register bit */
308 gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
309 MAX77843_MUIC_STATUS1_ADC1K_MASK);
310
311 /* Get VBVolt register bit */
312 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
313 MAX77843_MUIC_STATUS2_VBVOLT_MASK);
314 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
315
316 /* Offset of GND cable */
317 gnd_type |= MAX77843_MUIC_GND_USB_HOST;
318 cable_type = info->prev_gnd_type = gnd_type;
319 }
320 break;
321 default:
322 dev_err(info->dev, "Unknown cable group (%d)\n", group);
323 cable_type = -EINVAL;
324 break;
325 }
326
327 return cable_type;
328}
329
330static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
331{
332 int ret, gnd_cable_type;
333 bool attached;
334
335 gnd_cable_type = max77843_muic_get_cable_type(info,
336 MAX77843_CABLE_GROUP_ADC_GND, &attached);
337 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
338 attached ? "attached" : "detached", gnd_cable_type);
339
340 switch (gnd_cable_type) {
341 case MAX77843_MUIC_GND_USB_HOST:
342 case MAX77843_MUIC_GND_USB_HOST_VB:
343 ret = max77843_muic_set_path(info,
344 MAX77843_MUIC_CONTROL1_SW_USB,
345 attached);
346 if (ret < 0)
347 return ret;
348
349 extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
350 break;
351 case MAX77843_MUIC_GND_MHL_VB:
352 case MAX77843_MUIC_GND_MHL:
353 ret = max77843_muic_set_path(info,
354 MAX77843_MUIC_CONTROL1_SW_OPEN,
355 attached);
356 if (ret < 0)
357 return ret;
358
359 extcon_set_cable_state_(info->edev, EXTCON_DISP_MHL, attached);
360 break;
361 default:
362 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
363 attached ? "attached" : "detached", gnd_cable_type);
364 return -EINVAL;
365 }
366
367 return 0;
368}
369
370static int max77843_muic_jig_handler(struct max77843_muic_info *info,
371 int cable_type, bool attached)
372{
373 int ret;
374 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
375
376 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
377 attached ? "attached" : "detached", cable_type);
378
379 switch (cable_type) {
380 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
381 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
382 path = MAX77843_MUIC_CONTROL1_SW_USB;
383 break;
384 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
385 path = MAX77843_MUIC_CONTROL1_SW_UART;
386 break;
387 default:
388 return -EINVAL;
389 }
390
391 ret = max77843_muic_set_path(info, path, attached);
392 if (ret < 0)
393 return ret;
394
395 extcon_set_cable_state_(info->edev, EXTCON_JIG, attached);
396
397 return 0;
398}
399
400static int max77843_muic_adc_handler(struct max77843_muic_info *info)
401{
402 int ret, cable_type;
403 bool attached;
404
405 cable_type = max77843_muic_get_cable_type(info,
406 MAX77843_CABLE_GROUP_ADC, &attached);
407
408 dev_dbg(info->dev,
409 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
410 attached ? "attached" : "detached", cable_type,
411 info->prev_cable_type);
412
413 switch (cable_type) {
414 case MAX77843_MUIC_ADC_GROUND:
415 ret = max77843_muic_adc_gnd_handler(info);
416 if (ret < 0)
417 return ret;
418 break;
419 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
420 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
421 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
422 ret = max77843_muic_jig_handler(info, cable_type, attached);
423 if (ret < 0)
424 return ret;
425 break;
426 case MAX77843_MUIC_ADC_SEND_END_BUTTON:
427 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
428 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
429 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
430 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
431 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
432 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
433 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
434 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
435 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
436 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
437 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
438 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
439 case MAX77843_MUIC_ADC_RESERVED_ACC_1:
440 case MAX77843_MUIC_ADC_RESERVED_ACC_2:
441 case MAX77843_MUIC_ADC_RESERVED_ACC_3:
442 case MAX77843_MUIC_ADC_RESERVED_ACC_4:
443 case MAX77843_MUIC_ADC_RESERVED_ACC_5:
444 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
445 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
446 case MAX77843_MUIC_ADC_TTY_CONVERTER:
447 case MAX77843_MUIC_ADC_UART_CABLE:
448 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
449 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
450 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
451 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
452 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
453 case MAX77843_MUIC_ADC_OPEN:
454 dev_err(info->dev,
455 "accessory is %s but it isn't used (adc:0x%x)\n",
456 attached ? "attached" : "detached", cable_type);
457 return -EAGAIN;
458 default:
459 dev_err(info->dev,
460 "failed to detect %s accessory (adc:0x%x)\n",
461 attached ? "attached" : "detached", cable_type);
462 return -EINVAL;
463 }
464
465 return 0;
466}
467
468static int max77843_muic_chg_handler(struct max77843_muic_info *info)
469{
470 int ret, chg_type, gnd_type;
471 bool attached;
472
473 chg_type = max77843_muic_get_cable_type(info,
474 MAX77843_CABLE_GROUP_CHG, &attached);
475
476 dev_dbg(info->dev,
477 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
478 attached ? "attached" : "detached",
479 chg_type, info->prev_chg_type);
480
481 switch (chg_type) {
482 case MAX77843_MUIC_CHG_USB:
483 ret = max77843_muic_set_path(info,
484 MAX77843_MUIC_CONTROL1_SW_USB,
485 attached);
486 if (ret < 0)
487 return ret;
488
489 extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
490 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SDP,
491 attached);
492 break;
493 case MAX77843_MUIC_CHG_DOWNSTREAM:
494 ret = max77843_muic_set_path(info,
495 MAX77843_MUIC_CONTROL1_SW_OPEN,
496 attached);
497 if (ret < 0)
498 return ret;
499
500 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_CDP,
501 attached);
502 break;
503 case MAX77843_MUIC_CHG_DEDICATED:
504 ret = max77843_muic_set_path(info,
505 MAX77843_MUIC_CONTROL1_SW_OPEN,
506 attached);
507 if (ret < 0)
508 return ret;
509
510 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
511 attached);
512 break;
513 case MAX77843_MUIC_CHG_SPECIAL_500MA:
514 ret = max77843_muic_set_path(info,
515 MAX77843_MUIC_CONTROL1_SW_OPEN,
516 attached);
517 if (ret < 0)
518 return ret;
519
520 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SLOW,
521 attached);
522 break;
523 case MAX77843_MUIC_CHG_SPECIAL_1A:
524 ret = max77843_muic_set_path(info,
525 MAX77843_MUIC_CONTROL1_SW_OPEN,
526 attached);
527 if (ret < 0)
528 return ret;
529
530 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_FAST,
531 attached);
532 break;
533 case MAX77843_MUIC_CHG_GND:
534 gnd_type = max77843_muic_get_cable_type(info,
535 MAX77843_CABLE_GROUP_ADC_GND, &attached);
536
537 /* Charger cable on MHL accessory is attach or detach */
538 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
539 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
540 true);
541 else if (gnd_type == MAX77843_MUIC_GND_MHL)
542 extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
543 false);
544 break;
545 case MAX77843_MUIC_CHG_NONE:
546 break;
547 default:
548 dev_err(info->dev,
549 "failed to detect %s accessory (chg_type:0x%x)\n",
550 attached ? "attached" : "detached", chg_type);
551
552 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
553 attached);
554 return -EINVAL;
555 }
556
557 return 0;
558}
559
560static void max77843_muic_irq_work(struct work_struct *work)
561{
562 struct max77843_muic_info *info = container_of(work,
563 struct max77843_muic_info, irq_work);
564 struct max77693_dev *max77843 = info->max77843;
565 int ret = 0;
566
567 mutex_lock(&info->mutex);
568
569 ret = regmap_bulk_read(max77843->regmap_muic,
570 MAX77843_MUIC_REG_STATUS1, info->status,
571 MAX77843_MUIC_STATUS_NUM);
572 if (ret) {
573 dev_err(info->dev, "Cannot read STATUS registers\n");
574 mutex_unlock(&info->mutex);
575 return;
576 }
577
578 if (info->irq_adc) {
579 ret = max77843_muic_adc_handler(info);
580 if (ret)
581 dev_err(info->dev, "Unknown cable type\n");
582 info->irq_adc = false;
583 }
584
585 if (info->irq_chg) {
586 ret = max77843_muic_chg_handler(info);
587 if (ret)
588 dev_err(info->dev, "Unknown charger type\n");
589 info->irq_chg = false;
590 }
591
592 mutex_unlock(&info->mutex);
593}
594
595static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
596{
597 struct max77843_muic_info *info = data;
598 int i, irq_type = -1;
599
600 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
601 if (irq == max77843_muic_irqs[i].virq)
602 irq_type = max77843_muic_irqs[i].irq;
603
604 switch (irq_type) {
605 case MAX77843_MUIC_IRQ_INT1_ADC:
606 case MAX77843_MUIC_IRQ_INT1_ADCERROR:
607 case MAX77843_MUIC_IRQ_INT1_ADC1K:
608 info->irq_adc = true;
609 break;
610 case MAX77843_MUIC_IRQ_INT2_CHGTYP:
611 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
612 case MAX77843_MUIC_IRQ_INT2_DCDTMR:
613 case MAX77843_MUIC_IRQ_INT2_DXOVP:
614 case MAX77843_MUIC_IRQ_INT2_VBVOLT:
615 info->irq_chg = true;
616 break;
617 case MAX77843_MUIC_IRQ_INT3_VBADC:
618 case MAX77843_MUIC_IRQ_INT3_VDNMON:
619 case MAX77843_MUIC_IRQ_INT3_DNRES:
620 case MAX77843_MUIC_IRQ_INT3_MPNACK:
621 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
622 case MAX77843_MUIC_IRQ_INT3_MRXTRF:
623 case MAX77843_MUIC_IRQ_INT3_MRXPERR:
624 case MAX77843_MUIC_IRQ_INT3_MRXRDY:
625 break;
626 default:
627 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
628 break;
629 }
630
631 schedule_work(&info->irq_work);
632
633 return IRQ_HANDLED;
634}
635
636static void max77843_muic_detect_cable_wq(struct work_struct *work)
637{
638 struct max77843_muic_info *info = container_of(to_delayed_work(work),
639 struct max77843_muic_info, wq_detcable);
640 struct max77693_dev *max77843 = info->max77843;
641 int chg_type, adc, ret;
642 bool attached;
643
644 mutex_lock(&info->mutex);
645
646 ret = regmap_bulk_read(max77843->regmap_muic,
647 MAX77843_MUIC_REG_STATUS1, info->status,
648 MAX77843_MUIC_STATUS_NUM);
649 if (ret) {
650 dev_err(info->dev, "Cannot read STATUS registers\n");
651 goto err_cable_wq;
652 }
653
654 adc = max77843_muic_get_cable_type(info,
655 MAX77843_CABLE_GROUP_ADC, &attached);
656 if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
657 ret = max77843_muic_adc_handler(info);
658 if (ret < 0) {
659 dev_err(info->dev, "Cannot detect accessory\n");
660 goto err_cable_wq;
661 }
662 }
663
664 chg_type = max77843_muic_get_cable_type(info,
665 MAX77843_CABLE_GROUP_CHG, &attached);
666 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
667 ret = max77843_muic_chg_handler(info);
668 if (ret < 0) {
669 dev_err(info->dev, "Cannot detect charger accessory\n");
670 goto err_cable_wq;
671 }
672 }
673
674err_cable_wq:
675 mutex_unlock(&info->mutex);
676}
677
678static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
679 enum max77843_muic_adc_debounce_time time)
680{
681 struct max77693_dev *max77843 = info->max77843;
682 int ret;
683
684 switch (time) {
685 case MAX77843_DEBOUNCE_TIME_5MS:
686 case MAX77843_DEBOUNCE_TIME_10MS:
687 case MAX77843_DEBOUNCE_TIME_25MS:
688 case MAX77843_DEBOUNCE_TIME_38_62MS:
689 ret = regmap_update_bits(max77843->regmap_muic,
690 MAX77843_MUIC_REG_CONTROL4,
691 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
692 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
693 if (ret < 0) {
694 dev_err(info->dev, "Cannot write MUIC regmap\n");
695 return ret;
696 }
697 break;
698 default:
699 dev_err(info->dev, "Invalid ADC debounce time\n");
700 return -EINVAL;
701 }
702
703 return 0;
704}
705
706static int max77843_init_muic_regmap(struct max77693_dev *max77843)
707{
708 int ret;
709
710 max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
711 I2C_ADDR_MUIC);
712 if (!max77843->i2c_muic) {
713 dev_err(&max77843->i2c->dev,
714 "Cannot allocate I2C device for MUIC\n");
715 return -ENOMEM;
716 }
717
718 i2c_set_clientdata(max77843->i2c_muic, max77843);
719
720 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
721 &max77843_muic_regmap_config);
722 if (IS_ERR(max77843->regmap_muic)) {
723 ret = PTR_ERR(max77843->regmap_muic);
724 goto err_muic_i2c;
725 }
726
727 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
728 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
729 0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
730 if (ret < 0) {
731 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
732 goto err_muic_i2c;
733 }
734
735 return 0;
736
737err_muic_i2c:
738 i2c_unregister_device(max77843->i2c_muic);
739
740 return ret;
741}
742
743static int max77843_muic_probe(struct platform_device *pdev)
744{
745 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
746 struct max77843_muic_info *info;
747 unsigned int id;
748 int i, ret;
749
750 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
751 if (!info)
752 return -ENOMEM;
753
754 info->dev = &pdev->dev;
755 info->max77843 = max77843;
756
757 platform_set_drvdata(pdev, info);
758 mutex_init(&info->mutex);
759
760 /* Initialize i2c and regmap */
761 ret = max77843_init_muic_regmap(max77843);
762 if (ret) {
763 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
764 return ret;
765 }
766
767 /* Turn off auto detection configuration */
768 ret = regmap_update_bits(max77843->regmap_muic,
769 MAX77843_MUIC_REG_CONTROL4,
770 MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
771 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
772 CONTROL4_AUTO_DISABLE);
773
774 /* Initialize extcon device */
775 info->edev = devm_extcon_dev_allocate(&pdev->dev,
776 max77843_extcon_cable);
777 if (IS_ERR(info->edev)) {
778 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
779 ret = -ENODEV;
780 goto err_muic_irq;
781 }
782
783 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
784 if (ret) {
785 dev_err(&pdev->dev, "Failed to register extcon device\n");
786 goto err_muic_irq;
787 }
788
789 /* Set ADC debounce time */
790 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
791
792 /* Set initial path for UART */
793 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true);
794
795 /* Check revision number of MUIC device */
796 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
797 if (ret < 0) {
798 dev_err(&pdev->dev, "Failed to read revision number\n");
799 goto err_muic_irq;
800 }
801 dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
802
803 /* Support virtual irq domain for max77843 MUIC device */
804 INIT_WORK(&info->irq_work, max77843_muic_irq_work);
805
806 /* Clear IRQ bits before request IRQs */
807 ret = regmap_bulk_read(max77843->regmap_muic,
808 MAX77843_MUIC_REG_INT1, info->status,
809 MAX77843_MUIC_STATUS_NUM);
810 if (ret) {
811 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
812 goto err_muic_irq;
813 }
814
815 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
816 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
817 int virq = 0;
818
819 virq = regmap_irq_get_virq(max77843->irq_data_muic,
820 muic_irq->irq);
821 if (virq <= 0) {
822 ret = -EINVAL;
823 goto err_muic_irq;
824 }
825 muic_irq->virq = virq;
826
827 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
828 max77843_muic_irq_handler, IRQF_NO_SUSPEND,
829 muic_irq->name, info);
830 if (ret) {
831 dev_err(&pdev->dev,
832 "Failed to request irq (IRQ: %d, error: %d)\n",
833 muic_irq->irq, ret);
834 goto err_muic_irq;
835 }
836 }
837
838 /* Detect accessory after completing the initialization of platform */
839 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
840 queue_delayed_work(system_power_efficient_wq,
841 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
842
843 return 0;
844
845err_muic_irq:
846 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
847 i2c_unregister_device(max77843->i2c_muic);
848
849 return ret;
850}
851
852static int max77843_muic_remove(struct platform_device *pdev)
853{
854 struct max77843_muic_info *info = platform_get_drvdata(pdev);
855 struct max77693_dev *max77843 = info->max77843;
856
857 cancel_work_sync(&info->irq_work);
858 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
859 i2c_unregister_device(max77843->i2c_muic);
860
861 return 0;
862}
863
864static const struct platform_device_id max77843_muic_id[] = {
865 { "max77843-muic", },
866 { /* sentinel */ },
867};
868MODULE_DEVICE_TABLE(platform, max77843_muic_id);
869
870static struct platform_driver max77843_muic_driver = {
871 .driver = {
872 .name = "max77843-muic",
873 },
874 .probe = max77843_muic_probe,
875 .remove = max77843_muic_remove,
876 .id_table = max77843_muic_id,
877};
878
879static int __init max77843_muic_init(void)
880{
881 return platform_driver_register(&max77843_muic_driver);
882}
883subsys_initcall(max77843_muic_init);
884
885MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
886MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
887MODULE_LICENSE("GPL");