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Linux 4.16.11
[linux/fpc-iii.git] / drivers / extcon / extcon-max77843.c
blobc9fcd6cd41cbda238fedc31bcc676e45d12935be
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-provider.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
26 enum max77843_muic_status {
27 MAX77843_MUIC_STATUS1 = 0,
28 MAX77843_MUIC_STATUS2,
29 MAX77843_MUIC_STATUS3,
30
31 MAX77843_MUIC_STATUS_NUM,
32 };
33
34 struct 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
52 enum max77843_muic_cable_group {
53 MAX77843_CABLE_GROUP_ADC = 0,
54 MAX77843_CABLE_GROUP_ADC_GND,
55 MAX77843_CABLE_GROUP_CHG,
56 };
57
58 enum 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 */
66 enum 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, /* SmartDock */
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 /*
101 * The below accessories should check
102 * not only ADC value but also ADC1K and VBVolt value.
103 */
104 /* Offset|ADC1K|VBVolt| */
105 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */
106 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */
107 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */
108 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */
109 };
110
111 /* Define charger cable type */
112 enum max77843_muic_charger_type {
113 MAX77843_MUIC_CHG_NONE = 0,
114 MAX77843_MUIC_CHG_USB,
115 MAX77843_MUIC_CHG_DOWNSTREAM,
116 MAX77843_MUIC_CHG_DEDICATED,
117 MAX77843_MUIC_CHG_SPECIAL_500MA,
118 MAX77843_MUIC_CHG_SPECIAL_1A,
119 MAX77843_MUIC_CHG_SPECIAL_BIAS,
120 MAX77843_MUIC_CHG_RESERVED,
121 MAX77843_MUIC_CHG_GND,
122 MAX77843_MUIC_CHG_DOCK,
123 };
124
125 static const unsigned int max77843_extcon_cable[] = {
126 EXTCON_USB,
127 EXTCON_USB_HOST,
128 EXTCON_CHG_USB_SDP,
129 EXTCON_CHG_USB_DCP,
130 EXTCON_CHG_USB_CDP,
131 EXTCON_CHG_USB_FAST,
132 EXTCON_CHG_USB_SLOW,
133 EXTCON_DISP_MHL,
134 EXTCON_DOCK,
135 EXTCON_JIG,
136 EXTCON_NONE,
137 };
138
139 struct max77843_muic_irq {
140 unsigned int irq;
141 const char *name;
142 unsigned int virq;
143 };
144
145 static struct max77843_muic_irq max77843_muic_irqs[] = {
146 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" },
147 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" },
148 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" },
149 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" },
150 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" },
151 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" },
152 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" },
153 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" },
154 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" },
155 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" },
156 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" },
157 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"},
158 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"},
159 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"},
160 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"},
161 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"},
162 };
163
164 static const struct regmap_config max77843_muic_regmap_config = {
165 .reg_bits = 8,
166 .val_bits = 8,
167 .max_register = MAX77843_MUIC_REG_END,
168 };
169
170 static const struct regmap_irq max77843_muic_irq[] = {
171 /* INT1 interrupt */
172 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
173 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
174 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
175
176 /* INT2 interrupt */
177 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
178 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
179 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
180 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
181 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
182
183 /* INT3 interrupt */
184 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
185 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
186 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
187 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
188 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
189 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
190 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
191 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
192 };
193
194 static const struct regmap_irq_chip max77843_muic_irq_chip = {
195 .name = "max77843-muic",
196 .status_base = MAX77843_MUIC_REG_INT1,
197 .mask_base = MAX77843_MUIC_REG_INTMASK1,
198 .mask_invert = true,
199 .num_regs = 3,
200 .irqs = max77843_muic_irq,
201 .num_irqs = ARRAY_SIZE(max77843_muic_irq),
202 };
203
204 static int max77843_muic_set_path(struct max77843_muic_info *info,
205 u8 val, bool attached, bool nobccomp)
206 {
207 struct max77693_dev *max77843 = info->max77843;
208 int ret = 0;
209 unsigned int ctrl1, ctrl2;
210
211 if (attached)
212 ctrl1 = val;
213 else
214 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
215 if (nobccomp) {
216 /* Disable BC1.2 protocol and force manual switch control */
217 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;
218 }
219
220 ret = regmap_update_bits(max77843->regmap_muic,
221 MAX77843_MUIC_REG_CONTROL1,
222 MAX77843_MUIC_CONTROL1_COM_SW |
223 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,
224 ctrl1);
225 if (ret < 0) {
226 dev_err(info->dev, "Cannot switch MUIC port\n");
227 return ret;
228 }
229
230 if (attached)
231 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
232 else
233 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
234
235 ret = regmap_update_bits(max77843->regmap_muic,
236 MAX77843_MUIC_REG_CONTROL2,
237 MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
238 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
239 if (ret < 0) {
240 dev_err(info->dev, "Cannot update lowpower mode\n");
241 return ret;
242 }
243
244 dev_dbg(info->dev,
245 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
246 ctrl1, ctrl2, attached ? "attached" : "detached");
247
248 return 0;
249 }
250
251 static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,
252 bool on)
253 {
254 struct max77693_dev *max77843 = info->max77843;
255 unsigned int cnfg00;
256
257 if (on)
258 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;
259 else
260 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;
261
262 regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,
263 MAX77843_CHG_MODE_MASK, cnfg00);
264 }
265
266 static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
267 enum max77843_muic_cable_group group, bool *attached)
268 {
269 int adc, chg_type, cable_type, gnd_type;
270
271 adc = info->status[MAX77843_MUIC_STATUS1] &
272 MAX77843_MUIC_STATUS1_ADC_MASK;
273 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
274
275 switch (group) {
276 case MAX77843_CABLE_GROUP_ADC:
277 if (adc == MAX77843_MUIC_ADC_OPEN) {
278 *attached = false;
279 cable_type = info->prev_cable_type;
280 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
281 } else {
282 *attached = true;
283 cable_type = info->prev_cable_type = adc;
284 }
285 break;
286 case MAX77843_CABLE_GROUP_CHG:
287 chg_type = info->status[MAX77843_MUIC_STATUS2] &
288 MAX77843_MUIC_STATUS2_CHGTYP_MASK;
289
290 /* Check GROUND accessory with charger cable */
291 if (adc == MAX77843_MUIC_ADC_GROUND) {
292 if (chg_type == MAX77843_MUIC_CHG_NONE) {
293 /*
294 * The following state when charger cable is
295 * disconnected but the GROUND accessory still
296 * connected.
297 */
298 *attached = false;
299 cable_type = info->prev_chg_type;
300 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
301 } else {
302
303 /*
304 * The following state when charger cable is
305 * connected on the GROUND accessory.
306 */
307 *attached = true;
308 cable_type = MAX77843_MUIC_CHG_GND;
309 info->prev_chg_type = MAX77843_MUIC_CHG_GND;
310 }
311 break;
312 }
313
314 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */
315 if (chg_type == MAX77843_MUIC_CHG_NONE) {
316 *attached = false;
317 cable_type = info->prev_chg_type;
318 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
319 } else {
320 *attached = true;
321 cable_type = MAX77843_MUIC_CHG_DOCK;
322 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;
323 }
324 break;
325 }
326
327 if (chg_type == MAX77843_MUIC_CHG_NONE) {
328 *attached = false;
329 cable_type = info->prev_chg_type;
330 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
331 } else {
332 *attached = true;
333 cable_type = info->prev_chg_type = chg_type;
334 }
335 break;
336 case MAX77843_CABLE_GROUP_ADC_GND:
337 if (adc == MAX77843_MUIC_ADC_OPEN) {
338 *attached = false;
339 cable_type = info->prev_gnd_type;
340 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
341 } else {
342 *attached = true;
343
344 /*
345 * Offset|ADC1K|VBVolt|
346 * 0x1| 0| 0| USB-HOST
347 * 0x1| 0| 1| USB-HOST with VB
348 * 0x1| 1| 0| MHL
349 * 0x1| 1| 1| MHL with VB
350 */
351 /* Get ADC1K register bit */
352 gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
353 MAX77843_MUIC_STATUS1_ADC1K_MASK);
354
355 /* Get VBVolt register bit */
356 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
357 MAX77843_MUIC_STATUS2_VBVOLT_MASK);
358 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
359
360 /* Offset of GND cable */
361 gnd_type |= MAX77843_MUIC_GND_USB_HOST;
362 cable_type = info->prev_gnd_type = gnd_type;
363 }
364 break;
365 default:
366 dev_err(info->dev, "Unknown cable group (%d)\n", group);
367 cable_type = -EINVAL;
368 break;
369 }
370
371 return cable_type;
372 }
373
374 static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
375 {
376 int ret, gnd_cable_type;
377 bool attached;
378
379 gnd_cable_type = max77843_muic_get_cable_type(info,
380 MAX77843_CABLE_GROUP_ADC_GND, &attached);
381 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
382 attached ? "attached" : "detached", gnd_cable_type);
383
384 switch (gnd_cable_type) {
385 case MAX77843_MUIC_GND_USB_HOST:
386 case MAX77843_MUIC_GND_USB_HOST_VB:
387 ret = max77843_muic_set_path(info,
388 MAX77843_MUIC_CONTROL1_SW_USB,
389 attached, false);
390 if (ret < 0)
391 return ret;
392
393 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
394 max77843_charger_set_otg_vbus(info, attached);
395 break;
396 case MAX77843_MUIC_GND_MHL_VB:
397 case MAX77843_MUIC_GND_MHL:
398 ret = max77843_muic_set_path(info,
399 MAX77843_MUIC_CONTROL1_SW_OPEN,
400 attached, false);
401 if (ret < 0)
402 return ret;
403
404 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
405 break;
406 default:
407 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
408 attached ? "attached" : "detached", gnd_cable_type);
409 return -EINVAL;
410 }
411
412 return 0;
413 }
414
415 static int max77843_muic_jig_handler(struct max77843_muic_info *info,
416 int cable_type, bool attached)
417 {
418 int ret;
419 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
420
421 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
422 attached ? "attached" : "detached", cable_type);
423
424 switch (cable_type) {
425 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
426 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
427 path = MAX77843_MUIC_CONTROL1_SW_USB;
428 break;
429 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
430 path = MAX77843_MUIC_CONTROL1_SW_UART;
431 break;
432 default:
433 return -EINVAL;
434 }
435
436 ret = max77843_muic_set_path(info, path, attached, false);
437 if (ret < 0)
438 return ret;
439
440 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
441
442 return 0;
443 }
444
445 static int max77843_muic_dock_handler(struct max77843_muic_info *info,
446 bool attached)
447 {
448 int ret;
449
450 dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",
451 attached ? "attached" : "detached");
452
453 ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,
454 attached, attached);
455 if (ret < 0)
456 return ret;
457
458 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
459 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
460 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
461
462 return 0;
463 }
464
465 static int max77843_muic_adc_handler(struct max77843_muic_info *info)
466 {
467 int ret, cable_type;
468 bool attached;
469
470 cable_type = max77843_muic_get_cable_type(info,
471 MAX77843_CABLE_GROUP_ADC, &attached);
472
473 dev_dbg(info->dev,
474 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
475 attached ? "attached" : "detached", cable_type,
476 info->prev_cable_type);
477
478 switch (cable_type) {
479 case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */
480 ret = max77843_muic_dock_handler(info, attached);
481 if (ret < 0)
482 return ret;
483 break;
484 case MAX77843_MUIC_ADC_GROUND:
485 ret = max77843_muic_adc_gnd_handler(info);
486 if (ret < 0)
487 return ret;
488 break;
489 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
490 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
491 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
492 ret = max77843_muic_jig_handler(info, cable_type, attached);
493 if (ret < 0)
494 return ret;
495 break;
496 case MAX77843_MUIC_ADC_SEND_END_BUTTON:
497 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
498 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
499 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
500 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
501 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
502 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
503 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
504 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
505 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
506 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
507 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
508 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
509 case MAX77843_MUIC_ADC_RESERVED_ACC_1:
510 case MAX77843_MUIC_ADC_RESERVED_ACC_2:
511 case MAX77843_MUIC_ADC_RESERVED_ACC_4:
512 case MAX77843_MUIC_ADC_RESERVED_ACC_5:
513 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
514 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
515 case MAX77843_MUIC_ADC_TTY_CONVERTER:
516 case MAX77843_MUIC_ADC_UART_CABLE:
517 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
518 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
519 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
520 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
521 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
522 case MAX77843_MUIC_ADC_OPEN:
523 dev_err(info->dev,
524 "accessory is %s but it isn't used (adc:0x%x)\n",
525 attached ? "attached" : "detached", cable_type);
526 return -EAGAIN;
527 default:
528 dev_err(info->dev,
529 "failed to detect %s accessory (adc:0x%x)\n",
530 attached ? "attached" : "detached", cable_type);
531 return -EINVAL;
532 }
533
534 return 0;
535 }
536
537 static int max77843_muic_chg_handler(struct max77843_muic_info *info)
538 {
539 int ret, chg_type, gnd_type;
540 bool attached;
541
542 chg_type = max77843_muic_get_cable_type(info,
543 MAX77843_CABLE_GROUP_CHG, &attached);
544
545 dev_dbg(info->dev,
546 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
547 attached ? "attached" : "detached",
548 chg_type, info->prev_chg_type);
549
550 switch (chg_type) {
551 case MAX77843_MUIC_CHG_USB:
552 ret = max77843_muic_set_path(info,
553 MAX77843_MUIC_CONTROL1_SW_USB,
554 attached, false);
555 if (ret < 0)
556 return ret;
557
558 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
559 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
560 attached);
561 break;
562 case MAX77843_MUIC_CHG_DOWNSTREAM:
563 ret = max77843_muic_set_path(info,
564 MAX77843_MUIC_CONTROL1_SW_OPEN,
565 attached, false);
566 if (ret < 0)
567 return ret;
568
569 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
570 attached);
571 break;
572 case MAX77843_MUIC_CHG_DEDICATED:
573 ret = max77843_muic_set_path(info,
574 MAX77843_MUIC_CONTROL1_SW_OPEN,
575 attached, false);
576 if (ret < 0)
577 return ret;
578
579 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
580 attached);
581 break;
582 case MAX77843_MUIC_CHG_SPECIAL_500MA:
583 ret = max77843_muic_set_path(info,
584 MAX77843_MUIC_CONTROL1_SW_OPEN,
585 attached, false);
586 if (ret < 0)
587 return ret;
588
589 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
590 attached);
591 break;
592 case MAX77843_MUIC_CHG_SPECIAL_1A:
593 ret = max77843_muic_set_path(info,
594 MAX77843_MUIC_CONTROL1_SW_OPEN,
595 attached, false);
596 if (ret < 0)
597 return ret;
598
599 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
600 attached);
601 break;
602 case MAX77843_MUIC_CHG_GND:
603 gnd_type = max77843_muic_get_cable_type(info,
604 MAX77843_CABLE_GROUP_ADC_GND, &attached);
605
606 /* Charger cable on MHL accessory is attach or detach */
607 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
608 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
609 true);
610 else if (gnd_type == MAX77843_MUIC_GND_MHL)
611 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
612 false);
613 break;
614 case MAX77843_MUIC_CHG_DOCK:
615 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
616 break;
617 case MAX77843_MUIC_CHG_NONE:
618 break;
619 default:
620 dev_err(info->dev,
621 "failed to detect %s accessory (chg_type:0x%x)\n",
622 attached ? "attached" : "detached", chg_type);
623
624 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
625 attached, false);
626 return -EINVAL;
627 }
628
629 return 0;
630 }
631
632 static void max77843_muic_irq_work(struct work_struct *work)
633 {
634 struct max77843_muic_info *info = container_of(work,
635 struct max77843_muic_info, irq_work);
636 struct max77693_dev *max77843 = info->max77843;
637 int ret = 0;
638
639 mutex_lock(&info->mutex);
640
641 ret = regmap_bulk_read(max77843->regmap_muic,
642 MAX77843_MUIC_REG_STATUS1, info->status,
643 MAX77843_MUIC_STATUS_NUM);
644 if (ret) {
645 dev_err(info->dev, "Cannot read STATUS registers\n");
646 mutex_unlock(&info->mutex);
647 return;
648 }
649
650 if (info->irq_adc) {
651 ret = max77843_muic_adc_handler(info);
652 if (ret)
653 dev_err(info->dev, "Unknown cable type\n");
654 info->irq_adc = false;
655 }
656
657 if (info->irq_chg) {
658 ret = max77843_muic_chg_handler(info);
659 if (ret)
660 dev_err(info->dev, "Unknown charger type\n");
661 info->irq_chg = false;
662 }
663
664 mutex_unlock(&info->mutex);
665 }
666
667 static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
668 {
669 struct max77843_muic_info *info = data;
670 int i, irq_type = -1;
671
672 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
673 if (irq == max77843_muic_irqs[i].virq)
674 irq_type = max77843_muic_irqs[i].irq;
675
676 switch (irq_type) {
677 case MAX77843_MUIC_IRQ_INT1_ADC:
678 case MAX77843_MUIC_IRQ_INT1_ADCERROR:
679 case MAX77843_MUIC_IRQ_INT1_ADC1K:
680 info->irq_adc = true;
681 break;
682 case MAX77843_MUIC_IRQ_INT2_CHGTYP:
683 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
684 case MAX77843_MUIC_IRQ_INT2_DCDTMR:
685 case MAX77843_MUIC_IRQ_INT2_DXOVP:
686 case MAX77843_MUIC_IRQ_INT2_VBVOLT:
687 info->irq_chg = true;
688 break;
689 case MAX77843_MUIC_IRQ_INT3_VBADC:
690 case MAX77843_MUIC_IRQ_INT3_VDNMON:
691 case MAX77843_MUIC_IRQ_INT3_DNRES:
692 case MAX77843_MUIC_IRQ_INT3_MPNACK:
693 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
694 case MAX77843_MUIC_IRQ_INT3_MRXTRF:
695 case MAX77843_MUIC_IRQ_INT3_MRXPERR:
696 case MAX77843_MUIC_IRQ_INT3_MRXRDY:
697 break;
698 default:
699 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
700 break;
701 }
702
703 schedule_work(&info->irq_work);
704
705 return IRQ_HANDLED;
706 }
707
708 static void max77843_muic_detect_cable_wq(struct work_struct *work)
709 {
710 struct max77843_muic_info *info = container_of(to_delayed_work(work),
711 struct max77843_muic_info, wq_detcable);
712 struct max77693_dev *max77843 = info->max77843;
713 int chg_type, adc, ret;
714 bool attached;
715
716 mutex_lock(&info->mutex);
717
718 ret = regmap_bulk_read(max77843->regmap_muic,
719 MAX77843_MUIC_REG_STATUS1, info->status,
720 MAX77843_MUIC_STATUS_NUM);
721 if (ret) {
722 dev_err(info->dev, "Cannot read STATUS registers\n");
723 goto err_cable_wq;
724 }
725
726 adc = max77843_muic_get_cable_type(info,
727 MAX77843_CABLE_GROUP_ADC, &attached);
728 if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
729 ret = max77843_muic_adc_handler(info);
730 if (ret < 0) {
731 dev_err(info->dev, "Cannot detect accessory\n");
732 goto err_cable_wq;
733 }
734 }
735
736 chg_type = max77843_muic_get_cable_type(info,
737 MAX77843_CABLE_GROUP_CHG, &attached);
738 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
739 ret = max77843_muic_chg_handler(info);
740 if (ret < 0) {
741 dev_err(info->dev, "Cannot detect charger accessory\n");
742 goto err_cable_wq;
743 }
744 }
745
746 err_cable_wq:
747 mutex_unlock(&info->mutex);
748 }
749
750 static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
751 enum max77843_muic_adc_debounce_time time)
752 {
753 struct max77693_dev *max77843 = info->max77843;
754 int ret;
755
756 switch (time) {
757 case MAX77843_DEBOUNCE_TIME_5MS:
758 case MAX77843_DEBOUNCE_TIME_10MS:
759 case MAX77843_DEBOUNCE_TIME_25MS:
760 case MAX77843_DEBOUNCE_TIME_38_62MS:
761 ret = regmap_update_bits(max77843->regmap_muic,
762 MAX77843_MUIC_REG_CONTROL4,
763 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
764 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
765 if (ret < 0) {
766 dev_err(info->dev, "Cannot write MUIC regmap\n");
767 return ret;
768 }
769 break;
770 default:
771 dev_err(info->dev, "Invalid ADC debounce time\n");
772 return -EINVAL;
773 }
774
775 return 0;
776 }
777
778 static int max77843_init_muic_regmap(struct max77693_dev *max77843)
779 {
780 int ret;
781
782 max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
783 I2C_ADDR_MUIC);
784 if (!max77843->i2c_muic) {
785 dev_err(&max77843->i2c->dev,
786 "Cannot allocate I2C device for MUIC\n");
787 return -ENOMEM;
788 }
789
790 i2c_set_clientdata(max77843->i2c_muic, max77843);
791
792 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
793 &max77843_muic_regmap_config);
794 if (IS_ERR(max77843->regmap_muic)) {
795 ret = PTR_ERR(max77843->regmap_muic);
796 goto err_muic_i2c;
797 }
798
799 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
800 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
801 0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
802 if (ret < 0) {
803 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
804 goto err_muic_i2c;
805 }
806
807 return 0;
808
809 err_muic_i2c:
810 i2c_unregister_device(max77843->i2c_muic);
811
812 return ret;
813 }
814
815 static int max77843_muic_probe(struct platform_device *pdev)
816 {
817 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
818 struct max77843_muic_info *info;
819 unsigned int id;
820 int i, ret;
821
822 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
823 if (!info)
824 return -ENOMEM;
825
826 info->dev = &pdev->dev;
827 info->max77843 = max77843;
828
829 platform_set_drvdata(pdev, info);
830 mutex_init(&info->mutex);
831
832 /* Initialize i2c and regmap */
833 ret = max77843_init_muic_regmap(max77843);
834 if (ret) {
835 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
836 return ret;
837 }
838
839 /* Turn off auto detection configuration */
840 ret = regmap_update_bits(max77843->regmap_muic,
841 MAX77843_MUIC_REG_CONTROL4,
842 MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
843 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
844 CONTROL4_AUTO_DISABLE);
845
846 /* Initialize extcon device */
847 info->edev = devm_extcon_dev_allocate(&pdev->dev,
848 max77843_extcon_cable);
849 if (IS_ERR(info->edev)) {
850 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
851 ret = -ENODEV;
852 goto err_muic_irq;
853 }
854
855 ret = devm_extcon_dev_register(&pdev->dev, info->edev);
856 if (ret) {
857 dev_err(&pdev->dev, "Failed to register extcon device\n");
858 goto err_muic_irq;
859 }
860
861 /* Set ADC debounce time */
862 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
863
864 /* Set initial path for UART */
865 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true,
866 false);
867
868 /* Check revision number of MUIC device */
869 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
870 if (ret < 0) {
871 dev_err(&pdev->dev, "Failed to read revision number\n");
872 goto err_muic_irq;
873 }
874 dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
875
876 /* Support virtual irq domain for max77843 MUIC device */
877 INIT_WORK(&info->irq_work, max77843_muic_irq_work);
878
879 /* Clear IRQ bits before request IRQs */
880 ret = regmap_bulk_read(max77843->regmap_muic,
881 MAX77843_MUIC_REG_INT1, info->status,
882 MAX77843_MUIC_STATUS_NUM);
883 if (ret) {
884 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
885 goto err_muic_irq;
886 }
887
888 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
889 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
890 int virq = 0;
891
892 virq = regmap_irq_get_virq(max77843->irq_data_muic,
893 muic_irq->irq);
894 if (virq <= 0) {
895 ret = -EINVAL;
896 goto err_muic_irq;
897 }
898 muic_irq->virq = virq;
899
900 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
901 max77843_muic_irq_handler, IRQF_NO_SUSPEND,
902 muic_irq->name, info);
903 if (ret) {
904 dev_err(&pdev->dev,
905 "Failed to request irq (IRQ: %d, error: %d)\n",
906 muic_irq->irq, ret);
907 goto err_muic_irq;
908 }
909 }
910
911 /* Detect accessory after completing the initialization of platform */
912 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
913 queue_delayed_work(system_power_efficient_wq,
914 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
915
916 return 0;
917
918 err_muic_irq:
919 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
920 i2c_unregister_device(max77843->i2c_muic);
921
922 return ret;
923 }
924
925 static int max77843_muic_remove(struct platform_device *pdev)
926 {
927 struct max77843_muic_info *info = platform_get_drvdata(pdev);
928 struct max77693_dev *max77843 = info->max77843;
929
930 cancel_work_sync(&info->irq_work);
931 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
932 i2c_unregister_device(max77843->i2c_muic);
933
934 return 0;
935 }
936
937 static const struct platform_device_id max77843_muic_id[] = {
938 { "max77843-muic", },
939 { /* sentinel */ },
940 };
941 MODULE_DEVICE_TABLE(platform, max77843_muic_id);
942
943 static struct platform_driver max77843_muic_driver = {
944 .driver = {
945 .name = "max77843-muic",
946 },
947 .probe = max77843_muic_probe,
948 .remove = max77843_muic_remove,
949 .id_table = max77843_muic_id,
950 };
951
952 static int __init max77843_muic_init(void)
953 {
954 return platform_driver_register(&max77843_muic_driver);
955 }
956 subsys_initcall(max77843_muic_init);
957
958 MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
959 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
960 MODULE_LICENSE("GPL");
Linux with added FPC-III support