1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
4 //
5 // Copyright (C) 2012 Samsung Electrnoics
6 // Chanwoo Choi <cw00.choi@samsung.com>
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 /* unit: millisecond */
26
27 /*
28 * Default value of MAX77693 register to bring up MUIC device.
29 * If user don't set some initial value for MUIC device through platform data,
30 * extcon-max77693 driver use 'default_init_data' to bring up base operation
31 * of MAX77693 MUIC device.
32 */
33 static struct max77693_reg_data default_init_data[] = {
34 {
35 /* STATUS2 - [3]ChgDetRun */
36 .addr = MAX77693_MUIC_REG_STATUS2,
37 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
38 }, {
39 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
40 .addr = MAX77693_MUIC_REG_INTMASK1,
41 .data = INTMASK1_ADC1K_MASK
42 | INTMASK1_ADC_MASK,
43 }, {
44 /* INTMASK2 - Unmask [0]ChgTypM */
45 .addr = MAX77693_MUIC_REG_INTMASK2,
46 .data = INTMASK2_CHGTYP_MASK,
47 }, {
48 /* INTMASK3 - Mask all of interrupts */
49 .addr = MAX77693_MUIC_REG_INTMASK3,
50 .data = 0x0,
51 }, {
52 /* CDETCTRL2 */
53 .addr = MAX77693_MUIC_REG_CDETCTRL2,
54 .data = CDETCTRL2_VIDRMEN_MASK
55 | CDETCTRL2_DXOVPEN_MASK,
56 },
57 };
58
59 enum 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
66 struct 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 * Use delayed workqueue to detect cable state and then
82 * notify cable state to notifiee/platform through uevent.
83 * After completing the booting of platform, the extcon provider
84 * driver should notify cable state to upper layer.
85 */
86 struct delayed_work wq_detcable;
87
88 /* Button of dock device */
89 struct input_dev *dock;
90
91 /*
92 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
93 * h/w path of COMP2/COMN1 on CONTROL1 register.
94 */
95 int path_usb;
96 int path_uart;
97 };
98
99 enum 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
106 enum 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 * struct max77693_muic_irq
118 * @irq: the index of irq list of MUIC device.
119 * @name: the name of irq.
120 * @virq: the virtual irq to use irq domain
121 */
122 struct max77693_muic_irq {
123 unsigned int irq;
124 const char *name;
125 unsigned int virq;
126 };
127
128 static 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 /* Define supported accessory type */
148 enum 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 * The below accessories have same ADC value so ADCLow and
184 * ADC1K bit is used to separate specific accessory.
185 */
186 /* ADC|VBVolot|ADCLow|ADC1K| */
187 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
188 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
189 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
190 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
191 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
192 };
193
194 /*
195 * MAX77693 MUIC device support below list of accessories(external connector)
196 */
197 static 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 * max77693_muic_set_debounce_time - Set the debounce time of ADC
213 * @info: the instance including private data of max77693 MUIC
214 * @time: the debounce time of ADC
215 */
max77693_muic_set_debounce_time(struct max77693_muic_info * info,enum max77693_muic_adc_debounce_time time)216 static 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 * Don't touch BTLDset, JIGset when you want to change adc
228 * debounce time. If it writes other than 0 to BTLDset, JIGset
229 * muic device will be reset and loose current state.
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 * max77693_muic_set_path - Set hardware line according to attached cable
249 * @info: the instance including private data of max77693 MUIC
250 * @value: the path according to attached cable
251 * @attached: the state of cable (true:attached, false:detached)
252 *
253 * The max77693 MUIC device share outside H/W line among a varity of cables
254 * so, this function set internal path of H/W line according to the type of
255 * attached cable.
256 */
max77693_muic_set_path(struct max77693_muic_info * info,u8 val,bool attached)257 static 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; /* LowPwr=0, CPEn=1 */
277 else
278 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
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 * max77693_muic_get_cable_type - Return cable type and check cable state
298 * @info: the instance including private data of max77693 MUIC
299 * @group: the path according to attached cable
300 * @attached: store cable state and return
301 *
302 * This function check the cable state either attached or detached,
303 * and then divide precise type of cable according to cable group.
304 * - MAX77693_CABLE_GROUP_ADC
305 * - MAX77693_CABLE_GROUP_ADC_GND
306 * - MAX77693_CABLE_GROUP_CHG
307 * - MAX77693_CABLE_GROUP_VBVOLT
308 */
max77693_muic_get_cable_type(struct max77693_muic_info * info,enum max77693_muic_cable_group group,bool * attached)309 static 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 * Read ADC value to check cable type and decide cable state
323 * according to cable type
324 */
325 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
326 adc >>= MAX77693_STATUS1_ADC_SHIFT;
327
328 /*
329 * Check current cable state/cable type and store cable type
330 * (info->prev_cable_type) for handling cable when cable is
331 * detached.
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 * Read ADC value to check cable type and decide cable state
347 * according to cable type
348 */
349 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
350 adc >>= MAX77693_STATUS1_ADC_SHIFT;
351
352 /*
353 * Check current cable state/cable type and store cable type
354 * (info->prev_cable_type/_gnd) for handling cable when cable
355 * is detached.
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 * [0x1|VBVolt|ADCLow|ADC1K]
375 * [0x1| 0| 0| 0] USB_HOST
376 * [0x1| 1| 0| 0] USB_HSOT_VB
377 * [0x1| 0| 1| 0] Audio Video cable with load
378 * [0x1| 0| 1| 1] MHL without charging cable
379 * [0x1| 1| 1| 1] MHL with charging cable
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 * Read charger type to check cable type and decide cable state
394 * according to type of charger cable.
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 * Check current cable state/cable type and store cable
409 * type(info->prev_chg_type) for handling cable when
410 * charger cable is detached.
411 */
412 cable_type = info->prev_chg_type = chg_type;
413 }
414
415 break;
416 case MAX77693_CABLE_GROUP_VBVOLT:
417 /*
418 * Read ADC value to check cable type and decide cable state
419 * according to cable type
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 * Read vbvolt field, if vbvolt is 1,
434 * this cable is used for charging.
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
max77693_muic_dock_handler(struct max77693_muic_info * info,int cable_type,bool attached)450 static 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: /* Dock-Smart */
464 /*
465 * Check power cable whether attached or detached state.
466 * The Dock-Smart device need surely external power supply.
467 * If power cable(USB/TA) isn't connected to Dock device,
468 * user can't use Dock-Smart for desktop mode.
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 * Notify Dock/MHL state.
480 * - Dock device include three type of cable which
481 * are HDMI, USB for mouse/keyboard and micro-usb port
482 * for USB/TA cable. Dock device need always exteranl
483 * power supply(USB/TA cable through micro-usb cable). Dock
484 * device support screen output of target to separate
485 * monitor and mouse/keyboard for desktop mode.
486 *
487 * Features of 'USB/TA cable with Dock device'
488 * - Support MHL
489 * - Support external output feature of audio
490 * - Support charging through micro-usb port without data
491 * connection if TA cable is connected to target.
492 * - Support charging and data connection through micro-usb port
493 * if USB cable is connected between target and host
494 * device.
495 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
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: /* Dock-Desk */
505 dock_id = EXTCON_DOCK;
506 break;
507 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
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 /* Dock-Car/Desk/Audio, PATH:AUDIO */
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
528 out:
529 return 0;
530 }
531
max77693_muic_dock_button_handler(struct max77693_muic_info * info,int button_type,bool attached)532 static 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 /* DOCK_KEY_PREV */
542 code = KEY_PREVIOUSSONG;
543 break;
544 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
545 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
546 /* DOCK_KEY_NEXT */
547 code = KEY_NEXTSONG;
548 break;
549 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
550 /* DOCK_VOL_DOWN */
551 code = KEY_VOLUMEDOWN;
552 break;
553 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
554 /* DOCK_VOL_UP */
555 code = KEY_VOLUMEUP;
556 break;
557 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
558 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
559 /* DOCK_KEY_PLAY_PAUSE */
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
max77693_muic_adc_ground_handler(struct max77693_muic_info * info)575 static 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 /* USB_HOST, PATH: AP_USB */
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 /* Audio Video Cable with load, PATH:AUDIO */
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 /* MHL or MHL with USB/TA cable */
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
max77693_muic_jig_handler(struct max77693_muic_info * info,int cable_type,bool attached)618 static 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: /* ADC_JIG_USB_OFF */
630 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
631 /* PATH:AP_USB */
632 path = MAX77693_CONTROL1_SW_USB;
633 break;
634 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
635 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
636 /* PATH:AP_UART */
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
max77693_muic_adc_handler(struct max77693_muic_info * info)654 static 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 /* Check accessory state which is either detached or attached */
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 /* USB_HOST/MHL/Audio */
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 /* JIG */
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: /* Dock-Smart */
685 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
686 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
687 /*
688 * DOCK device
689 *
690 * The MAX77693 MUIC device can detect total 34 cable type
691 * except of charger cable and MUIC device didn't define
692 * specfic role of cable in the range of from 0x01 to 0x12
693 * of ADC value. So, can use/define cable with no role according
694 * to schema of hardware board.
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: /* DOCK_KEY_PREV */
701 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
702 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
703 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
704 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
705 /*
706 * Button of DOCK device
707 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
708 *
709 * The MAX77693 MUIC device can detect total 34 cable type
710 * except of charger cable and MUIC device didn't define
711 * specfic role of cable in the range of from 0x01 to 0x12
712 * of ADC value. So, can use/define cable with no role according
713 * to schema of hardware board.
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 * This accessory isn't used in general case if it is specially
745 * needed to detect additional accessory, should implement
746 * proper operation when this accessory is attached/detached.
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
max77693_muic_chg_handler(struct max77693_muic_info * info)762 static 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 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
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 * MHL cable with USB/TA cable
792 * - MHL cable include two port(HDMI line and separate
793 * micro-usb port. When the target connect MHL cable,
794 * extcon driver check whether USB/TA cable is
795 * connected. If USB/TA cable is connected, extcon
796 * driver notify state to notifiee for charging battery.
797 *
798 * Features of 'USB/TA with MHL cable'
799 * - Support MHL
800 * - Support charging through micro-usb port without
801 * data connection
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 /* Check MAX77693_CABLE_GROUP_ADC type */
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: /* Dock-Audio */
816 /*
817 * Dock-Audio device with USB/TA cable
818 * - Dock device include two port(Dock-Audio and micro-
819 * usb port). When the target connect Dock-Audio device,
820 * extcon driver check whether USB/TA cable is connected
821 * or not. If USB/TA cable is connected, extcon driver
822 * notify state to notifiee for charging battery.
823 *
824 * Features of 'USB/TA cable with Dock-Audio device'
825 * - Support external output feature of audio.
826 * - Support charging through micro-usb port without
827 * data connection.
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: /* Dock-Smart */
839 /*
840 * Dock-Smart device with USB/TA cable
841 * - Dock-Desk device include three type of cable which
842 * are HDMI, USB for mouse/keyboard and micro-usb port
843 * for USB/TA cable. Dock-Smart device need always
844 * exteranl power supply(USB/TA cable through micro-usb
845 * cable). Dock-Smart device support screen output of
846 * target to separate monitor and mouse/keyboard for
847 * desktop mode.
848 *
849 * Features of 'USB/TA cable with Dock-Smart device'
850 * - Support MHL
851 * - Support external output feature of audio
852 * - Support charging through micro-usb port without
853 * data connection if TA cable is connected to target.
854 * - Support charging and data connection through micro-
855 * usb port if USB cable is connected between target
856 * and host device
857 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
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 /* Check MAX77693_CABLE_GROUP_CHG type */
872 switch (chg_type) {
873 case MAX77693_CHARGER_TYPE_NONE:
874 /*
875 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
876 * cable is attached, muic device happen below two irq.
877 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
878 * MHL/Dock-Audio.
879 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
880 * USB/TA cable connected to MHL or Dock-Audio.
881 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
882 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
883 *
884 * If user attach MHL (with USB/TA cable and immediately
885 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
886 * _INT2_CHGTYP irq is happened, USB/TA cable remain
887 * connected state to target. But USB/TA cable isn't
888 * connected to target. The user be face with unusual
889 * action. So, driver should check this situation in
890 * spite of, that previous charger type is N/A.
891 */
892 break;
893 case MAX77693_CHARGER_TYPE_USB:
894 /* Only USB cable, PATH:AP_USB */
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 /* Only TA cable */
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
max77693_muic_irq_work(struct work_struct * work)936 static 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 * Handle all of accessory except for
967 * type of charger accessory.
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 /* Handle charger accessory */
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
max77693_muic_irq_handler(int irq,void * data)1000 static 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
1010 static const struct regmap_config max77693_muic_regmap_config = {
1011 .reg_bits = 8,
1012 .val_bits = 8,
1013 };
1014
max77693_muic_detect_accessory(struct max77693_muic_info * info)1015 static 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 /* Read STATUSx register to detect accessory */
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
max77693_muic_detect_cable_wq(struct work_struct * work)1060 static 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
max77693_muic_probe(struct platform_device * pdev)1068 static 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 /* Register input device for button of dock device */
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 /* Support irq domain for MAX77693 MUIC device */
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 /* Initialize extcon device */
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 /* Initialize MUIC register by using platform data or default data */
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 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1194 * h/w path of COMP2/COMN1 on CONTROL1 register.
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 * Default delay time for detecting cable state
1208 * after certain time.
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 /* Set initial path for UART when JIG is connected to get serial logs */
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 /* Check revision number of MUIC device*/
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 /* Set ADC debounce time */
1244 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1245
1246 /*
1247 * Detect accessory after completing the initialization of platform
1248 *
1249 * - Use delayed workqueue to detect cable state and then
1250 * notify cable state to notifiee/platform through uevent.
1251 * After completing the booting of platform, the extcon provider
1252 * driver should notify cable state to upper layer.
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
1261 static const struct of_device_id of_max77693_muic_dt_match[] = {
1262 { .compatible = "maxim,max77693-muic", },
1263 { /* sentinel */ },
1264 };
1265 MODULE_DEVICE_TABLE(of, of_max77693_muic_dt_match);
1266
1267 static struct platform_driver max77693_muic_driver = {
1268 .driver = {
1269 .name = DEV_NAME,
1270 .of_match_table = of_max77693_muic_dt_match,
1271 },
1272 .probe = max77693_muic_probe,
1273 };
1274
1275 module_platform_driver(max77693_muic_driver);
1276
1277 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1278 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1279 MODULE_LICENSE("GPL");
1280 MODULE_ALIAS("platform:max77693-muic");
1281