alpha: Replace sg++ with sg = sg_next(sg)
[linux-2.6-microblaze.git] / drivers / extcon / extcon-max77693.c
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/kernel.h>
9 #include <linux/module.h>
10 #include <linux/i2c.h>
11 #include <linux/slab.h>
12 #include <linux/input.h>
13 #include <linux/interrupt.h>
14 #include <linux/err.h>
15 #include <linux/platform_device.h>
16 #include <linux/mfd/max77693.h>
17 #include <linux/mfd/max77693-common.h>
18 #include <linux/mfd/max77693-private.h>
19 #include <linux/extcon-provider.h>
20 #include <linux/regmap.h>
21 #include <linux/irqdomain.h>
22
23 #define DEV_NAME                        "max77693-muic"
24 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
25
26 /*
27  * Default value of MAX77693 register to bring up MUIC device.
28  * If user don't set some initial value for MUIC device through platform data,
29  * extcon-max77693 driver use 'default_init_data' to bring up base operation
30  * of MAX77693 MUIC device.
31  */
32 static struct max77693_reg_data default_init_data[] = {
33         {
34                 /* STATUS2 - [3]ChgDetRun */
35                 .addr = MAX77693_MUIC_REG_STATUS2,
36                 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
37         }, {
38                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
39                 .addr = MAX77693_MUIC_REG_INTMASK1,
40                 .data = INTMASK1_ADC1K_MASK
41                         | INTMASK1_ADC_MASK,
42         }, {
43                 /* INTMASK2 - Unmask [0]ChgTypM */
44                 .addr = MAX77693_MUIC_REG_INTMASK2,
45                 .data = INTMASK2_CHGTYP_MASK,
46         }, {
47                 /* INTMASK3 - Mask all of interrupts */
48                 .addr = MAX77693_MUIC_REG_INTMASK3,
49                 .data = 0x0,
50         }, {
51                 /* CDETCTRL2 */
52                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
53                 .data = CDETCTRL2_VIDRMEN_MASK
54                         | CDETCTRL2_DXOVPEN_MASK,
55         },
56 };
57
58 enum max77693_muic_adc_debounce_time {
59         ADC_DEBOUNCE_TIME_5MS = 0,
60         ADC_DEBOUNCE_TIME_10MS,
61         ADC_DEBOUNCE_TIME_25MS,
62         ADC_DEBOUNCE_TIME_38_62MS,
63 };
64
65 struct max77693_muic_info {
66         struct device *dev;
67         struct max77693_dev *max77693;
68         struct extcon_dev *edev;
69         int prev_cable_type;
70         int prev_cable_type_gnd;
71         int prev_chg_type;
72         int prev_button_type;
73         u8 status[2];
74
75         int irq;
76         struct work_struct irq_work;
77         struct mutex mutex;
78
79         /*
80          * Use delayed workqueue to detect cable state and then
81          * notify cable state to notifiee/platform through uevent.
82          * After completing the booting of platform, the extcon provider
83          * driver should notify cable state to upper layer.
84          */
85         struct delayed_work wq_detcable;
86
87         /* Button of dock device */
88         struct input_dev *dock;
89
90         /*
91          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
92          * h/w path of COMP2/COMN1 on CONTROL1 register.
93          */
94         int path_usb;
95         int path_uart;
96 };
97
98 enum max77693_muic_cable_group {
99         MAX77693_CABLE_GROUP_ADC = 0,
100         MAX77693_CABLE_GROUP_ADC_GND,
101         MAX77693_CABLE_GROUP_CHG,
102         MAX77693_CABLE_GROUP_VBVOLT,
103 };
104
105 enum max77693_muic_charger_type {
106         MAX77693_CHARGER_TYPE_NONE = 0,
107         MAX77693_CHARGER_TYPE_USB,
108         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
109         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
110         MAX77693_CHARGER_TYPE_APPLE_500MA,
111         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
112         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
113 };
114
115 /**
116  * struct max77693_muic_irq
117  * @irq: the index of irq list of MUIC device.
118  * @name: the name of irq.
119  * @virq: the virtual irq to use irq domain
120  */
121 struct max77693_muic_irq {
122         unsigned int irq;
123         const char *name;
124         unsigned int virq;
125 };
126
127 static struct max77693_muic_irq muic_irqs[] = {
128         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
129         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
130         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
131         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
132         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
133         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
134         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
135         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
136         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
137         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
138         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
139         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
140         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
141         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
142         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
143         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
144 };
145
146 /* Define supported accessory type */
147 enum max77693_muic_acc_type {
148         MAX77693_MUIC_ADC_GROUND = 0x0,
149         MAX77693_MUIC_ADC_SEND_END_BUTTON,
150         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
151         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
152         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
153         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
154         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
155         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
156         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
157         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
158         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
159         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
160         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
161         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
162         MAX77693_MUIC_ADC_RESERVED_ACC_1,
163         MAX77693_MUIC_ADC_RESERVED_ACC_2,
164         MAX77693_MUIC_ADC_RESERVED_ACC_3,
165         MAX77693_MUIC_ADC_RESERVED_ACC_4,
166         MAX77693_MUIC_ADC_RESERVED_ACC_5,
167         MAX77693_MUIC_ADC_CEA936_AUDIO,
168         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
169         MAX77693_MUIC_ADC_TTY_CONVERTER,
170         MAX77693_MUIC_ADC_UART_CABLE,
171         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
172         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
173         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
174         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
175         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
176         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
177         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
178         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
179         MAX77693_MUIC_ADC_OPEN,
180
181         /*
182          * The below accessories have same ADC value so ADCLow and
183          * ADC1K bit is used to separate specific accessory.
184          */
185                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
186         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
187         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
188         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
189         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
190         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
191 };
192
193 /*
194  * MAX77693 MUIC device support below list of accessories(external connector)
195  */
196 static const unsigned int max77693_extcon_cable[] = {
197         EXTCON_USB,
198         EXTCON_USB_HOST,
199         EXTCON_CHG_USB_SDP,
200         EXTCON_CHG_USB_DCP,
201         EXTCON_CHG_USB_FAST,
202         EXTCON_CHG_USB_SLOW,
203         EXTCON_CHG_USB_CDP,
204         EXTCON_DISP_MHL,
205         EXTCON_JIG,
206         EXTCON_DOCK,
207         EXTCON_NONE,
208 };
209
210 /*
211  * max77693_muic_set_debounce_time - Set the debounce time of ADC
212  * @info: the instance including private data of max77693 MUIC
213  * @time: the debounce time of ADC
214  */
215 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
216                 enum max77693_muic_adc_debounce_time time)
217 {
218         int ret;
219
220         switch (time) {
221         case ADC_DEBOUNCE_TIME_5MS:
222         case ADC_DEBOUNCE_TIME_10MS:
223         case ADC_DEBOUNCE_TIME_25MS:
224         case ADC_DEBOUNCE_TIME_38_62MS:
225                 /*
226                  * Don't touch BTLDset, JIGset when you want to change adc
227                  * debounce time. If it writes other than 0 to BTLDset, JIGset
228                  * muic device will be reset and loose current state.
229                  */
230                 ret = regmap_write(info->max77693->regmap_muic,
231                                   MAX77693_MUIC_REG_CTRL3,
232                                   time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
233                 if (ret) {
234                         dev_err(info->dev, "failed to set ADC debounce time\n");
235                         return ret;
236                 }
237                 break;
238         default:
239                 dev_err(info->dev, "invalid ADC debounce time\n");
240                 return -EINVAL;
241         }
242
243         return 0;
244 };
245
246 /*
247  * max77693_muic_set_path - Set hardware line according to attached cable
248  * @info: the instance including private data of max77693 MUIC
249  * @value: the path according to attached cable
250  * @attached: the state of cable (true:attached, false:detached)
251  *
252  * The max77693 MUIC device share outside H/W line among a varity of cables
253  * so, this function set internal path of H/W line according to the type of
254  * attached cable.
255  */
256 static int max77693_muic_set_path(struct max77693_muic_info *info,
257                 u8 val, bool attached)
258 {
259         int ret;
260         unsigned int ctrl1, ctrl2 = 0;
261
262         if (attached)
263                 ctrl1 = val;
264         else
265                 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
266
267         ret = regmap_update_bits(info->max77693->regmap_muic,
268                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
269         if (ret < 0) {
270                 dev_err(info->dev, "failed to update MUIC register\n");
271                 return ret;
272         }
273
274         if (attached)
275                 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;   /* LowPwr=0, CPEn=1 */
276         else
277                 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
278
279         ret = regmap_update_bits(info->max77693->regmap_muic,
280                         MAX77693_MUIC_REG_CTRL2,
281                         MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
282                         ctrl2);
283         if (ret < 0) {
284                 dev_err(info->dev, "failed to update MUIC register\n");
285                 return ret;
286         }
287
288         dev_info(info->dev,
289                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
290                 ctrl1, ctrl2, attached ? "attached" : "detached");
291
292         return 0;
293 }
294
295 /*
296  * max77693_muic_get_cable_type - Return cable type and check cable state
297  * @info: the instance including private data of max77693 MUIC
298  * @group: the path according to attached cable
299  * @attached: store cable state and return
300  *
301  * This function check the cable state either attached or detached,
302  * and then divide precise type of cable according to cable group.
303  *      - MAX77693_CABLE_GROUP_ADC
304  *      - MAX77693_CABLE_GROUP_ADC_GND
305  *      - MAX77693_CABLE_GROUP_CHG
306  *      - MAX77693_CABLE_GROUP_VBVOLT
307  */
308 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
309                 enum max77693_muic_cable_group group, bool *attached)
310 {
311         int cable_type = 0;
312         int adc;
313         int adc1k;
314         int adclow;
315         int vbvolt;
316         int chg_type;
317
318         switch (group) {
319         case MAX77693_CABLE_GROUP_ADC:
320                 /*
321                  * Read ADC value to check cable type and decide cable state
322                  * according to cable type
323                  */
324                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
325                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
326
327                 /*
328                  * Check current cable state/cable type and store cable type
329                  * (info->prev_cable_type) for handling cable when cable is
330                  * detached.
331                  */
332                 if (adc == MAX77693_MUIC_ADC_OPEN) {
333                         *attached = false;
334
335                         cable_type = info->prev_cable_type;
336                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
337                 } else {
338                         *attached = true;
339
340                         cable_type = info->prev_cable_type = adc;
341                 }
342                 break;
343         case MAX77693_CABLE_GROUP_ADC_GND:
344                 /*
345                  * Read ADC value to check cable type and decide cable state
346                  * according to cable type
347                  */
348                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
349                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
350
351                 /*
352                  * Check current cable state/cable type and store cable type
353                  * (info->prev_cable_type/_gnd) for handling cable when cable
354                  * is detached.
355                  */
356                 if (adc == MAX77693_MUIC_ADC_OPEN) {
357                         *attached = false;
358
359                         cable_type = info->prev_cable_type_gnd;
360                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
361                 } else {
362                         *attached = true;
363
364                         adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
365                         adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
366                         adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
367                         adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
368
369                         vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
370                         vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
371
372                         /**
373                          * [0x1|VBVolt|ADCLow|ADC1K]
374                          * [0x1|     0|     0|    0] USB_HOST
375                          * [0x1|     1|     0|    0] USB_HSOT_VB
376                          * [0x1|     0|     1|    0] Audio Video cable with load
377                          * [0x1|     0|     1|    1] MHL without charging cable
378                          * [0x1|     1|     1|    1] MHL with charging cable
379                          */
380                         cable_type = ((0x1 << 8)
381                                         | (vbvolt << 2)
382                                         | (adclow << 1)
383                                         | adc1k);
384
385                         info->prev_cable_type = adc;
386                         info->prev_cable_type_gnd = cable_type;
387                 }
388
389                 break;
390         case MAX77693_CABLE_GROUP_CHG:
391                 /*
392                  * Read charger type to check cable type and decide cable state
393                  * according to type of charger cable.
394                  */
395                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
396                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
397
398                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
399                         *attached = false;
400
401                         cable_type = info->prev_chg_type;
402                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
403                 } else {
404                         *attached = true;
405
406                         /*
407                          * Check current cable state/cable type and store cable
408                          * type(info->prev_chg_type) for handling cable when
409                          * charger cable is detached.
410                          */
411                         cable_type = info->prev_chg_type = chg_type;
412                 }
413
414                 break;
415         case MAX77693_CABLE_GROUP_VBVOLT:
416                 /*
417                  * Read ADC value to check cable type and decide cable state
418                  * according to cable type
419                  */
420                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
421                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
422                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
423                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
424
425                 if (adc == MAX77693_MUIC_ADC_OPEN
426                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
427                         *attached = false;
428                 else
429                         *attached = true;
430
431                 /*
432                  * Read vbvolt field, if vbvolt is 1,
433                  * this cable is used for charging.
434                  */
435                 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
436                 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
437
438                 cable_type = vbvolt;
439                 break;
440         default:
441                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
442                 cable_type = -EINVAL;
443                 break;
444         }
445
446         return cable_type;
447 }
448
449 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
450                 int cable_type, bool attached)
451 {
452         int ret = 0;
453         int vbvolt;
454         bool cable_attached;
455         unsigned int dock_id;
456
457         dev_info(info->dev,
458                 "external connector is %s (adc:0x%02x)\n",
459                 attached ? "attached" : "detached", cable_type);
460
461         switch (cable_type) {
462         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
463                 /*
464                  * Check power cable whether attached or detached state.
465                  * The Dock-Smart device need surely external power supply.
466                  * If power cable(USB/TA) isn't connected to Dock device,
467                  * user can't use Dock-Smart for desktop mode.
468                  */
469                 vbvolt = max77693_muic_get_cable_type(info,
470                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
471                 if (attached && !vbvolt) {
472                         dev_warn(info->dev,
473                                 "Cannot detect external power supply\n");
474                         return 0;
475                 }
476
477                 /*
478                  * Notify Dock/MHL state.
479                  * - Dock device include three type of cable which
480                  * are HDMI, USB for mouse/keyboard and micro-usb port
481                  * for USB/TA cable. Dock device need always exteranl
482                  * power supply(USB/TA cable through micro-usb cable). Dock
483                  * device support screen output of target to separate
484                  * monitor and mouse/keyboard for desktop mode.
485                  *
486                  * Features of 'USB/TA cable with Dock device'
487                  * - Support MHL
488                  * - Support external output feature of audio
489                  * - Support charging through micro-usb port without data
490                  *           connection if TA cable is connected to target.
491                  * - Support charging and data connection through micro-usb port
492                  *           if USB cable is connected between target and host
493                  *           device.
494                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
495                  */
496                 ret = max77693_muic_set_path(info, info->path_usb, attached);
497                 if (ret < 0)
498                         return ret;
499
500                 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
501                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
502                 goto out;
503         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
504                 dock_id = EXTCON_DOCK;
505                 break;
506         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
507                 dock_id = EXTCON_DOCK;
508                 if (!attached) {
509                         extcon_set_state_sync(info->edev, EXTCON_USB, false);
510                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
511                                                 false);
512                 }
513                 break;
514         default:
515                 dev_err(info->dev, "failed to detect %s dock device\n",
516                         attached ? "attached" : "detached");
517                 return -EINVAL;
518         }
519
520         /* Dock-Car/Desk/Audio, PATH:AUDIO */
521         ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
522                                         attached);
523         if (ret < 0)
524                 return ret;
525         extcon_set_state_sync(info->edev, dock_id, attached);
526
527 out:
528         return 0;
529 }
530
531 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
532                 int button_type, bool attached)
533 {
534         struct input_dev *dock = info->dock;
535         unsigned int code;
536
537         switch (button_type) {
538         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
539                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
540                 /* DOCK_KEY_PREV */
541                 code = KEY_PREVIOUSSONG;
542                 break;
543         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
544                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
545                 /* DOCK_KEY_NEXT */
546                 code = KEY_NEXTSONG;
547                 break;
548         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
549                 /* DOCK_VOL_DOWN */
550                 code = KEY_VOLUMEDOWN;
551                 break;
552         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
553                 /* DOCK_VOL_UP */
554                 code = KEY_VOLUMEUP;
555                 break;
556         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
557                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
558                 /* DOCK_KEY_PLAY_PAUSE */
559                 code = KEY_PLAYPAUSE;
560                 break;
561         default:
562                 dev_err(info->dev,
563                         "failed to detect %s key (adc:0x%x)\n",
564                         attached ? "pressed" : "released", button_type);
565                 return -EINVAL;
566         }
567
568         input_event(dock, EV_KEY, code, attached);
569         input_sync(dock);
570
571         return 0;
572 }
573
574 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
575 {
576         int cable_type_gnd;
577         int ret = 0;
578         bool attached;
579
580         cable_type_gnd = max77693_muic_get_cable_type(info,
581                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
582
583         switch (cable_type_gnd) {
584         case MAX77693_MUIC_GND_USB_HOST:
585         case MAX77693_MUIC_GND_USB_HOST_VB:
586                 /* USB_HOST, PATH: AP_USB */
587                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
588                                                 attached);
589                 if (ret < 0)
590                         return ret;
591                 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
592                 break;
593         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
594                 /* Audio Video Cable with load, PATH:AUDIO */
595                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
596                                                 attached);
597                 if (ret < 0)
598                         return ret;
599                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
600                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
601                                         attached);
602                 break;
603         case MAX77693_MUIC_GND_MHL:
604         case MAX77693_MUIC_GND_MHL_VB:
605                 /* MHL or MHL with USB/TA cable */
606                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
607                 break;
608         default:
609                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
610                         attached ? "attached" : "detached");
611                 return -EINVAL;
612         }
613
614         return 0;
615 }
616
617 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
618                 int cable_type, bool attached)
619 {
620         int ret = 0;
621         u8 path = MAX77693_CONTROL1_SW_OPEN;
622
623         dev_info(info->dev,
624                 "external connector is %s (adc:0x%02x)\n",
625                 attached ? "attached" : "detached", cable_type);
626
627         switch (cable_type) {
628         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
629         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
630                 /* PATH:AP_USB */
631                 path = MAX77693_CONTROL1_SW_USB;
632                 break;
633         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
634         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
635                 /* PATH:AP_UART */
636                 path = MAX77693_CONTROL1_SW_UART;
637                 break;
638         default:
639                 dev_err(info->dev, "failed to detect %s jig cable\n",
640                         attached ? "attached" : "detached");
641                 return -EINVAL;
642         }
643
644         ret = max77693_muic_set_path(info, path, attached);
645         if (ret < 0)
646                 return ret;
647
648         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
649
650         return 0;
651 }
652
653 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
654 {
655         int cable_type;
656         int button_type;
657         bool attached;
658         int ret = 0;
659
660         /* Check accessory state which is either detached or attached */
661         cable_type = max77693_muic_get_cable_type(info,
662                                 MAX77693_CABLE_GROUP_ADC, &attached);
663
664         dev_info(info->dev,
665                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
666                 attached ? "attached" : "detached", cable_type,
667                 info->prev_cable_type);
668
669         switch (cable_type) {
670         case MAX77693_MUIC_ADC_GROUND:
671                 /* USB_HOST/MHL/Audio */
672                 max77693_muic_adc_ground_handler(info);
673                 break;
674         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
675         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
676         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
677         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
678                 /* JIG */
679                 ret = max77693_muic_jig_handler(info, cable_type, attached);
680                 if (ret < 0)
681                         return ret;
682                 break;
683         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
684         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
685         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
686                 /*
687                  * DOCK device
688                  *
689                  * The MAX77693 MUIC device can detect total 34 cable type
690                  * except of charger cable and MUIC device didn't define
691                  * specfic role of cable in the range of from 0x01 to 0x12
692                  * of ADC value. So, can use/define cable with no role according
693                  * to schema of hardware board.
694                  */
695                 ret = max77693_muic_dock_handler(info, cable_type, attached);
696                 if (ret < 0)
697                         return ret;
698                 break;
699         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
700         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
701         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
702         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
703         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
704                 /*
705                  * Button of DOCK device
706                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
707                  *
708                  * The MAX77693 MUIC device can detect total 34 cable type
709                  * except of charger cable and MUIC device didn't define
710                  * specfic role of cable in the range of from 0x01 to 0x12
711                  * of ADC value. So, can use/define cable with no role according
712                  * to schema of hardware board.
713                  */
714                 if (attached)
715                         button_type = info->prev_button_type = cable_type;
716                 else
717                         button_type = info->prev_button_type;
718
719                 ret = max77693_muic_dock_button_handler(info, button_type,
720                                                         attached);
721                 if (ret < 0)
722                         return ret;
723                 break;
724         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
725         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
726         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
727         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
728         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
729         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
730         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
731         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
732         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
733         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
734         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
735         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
736         case MAX77693_MUIC_ADC_CEA936_AUDIO:
737         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
738         case MAX77693_MUIC_ADC_TTY_CONVERTER:
739         case MAX77693_MUIC_ADC_UART_CABLE:
740         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
741         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
742                 /*
743                  * This accessory isn't used in general case if it is specially
744                  * needed to detect additional accessory, should implement
745                  * proper operation when this accessory is attached/detached.
746                  */
747                 dev_info(info->dev,
748                         "accessory is %s but it isn't used (adc:0x%x)\n",
749                         attached ? "attached" : "detached", cable_type);
750                 return -EAGAIN;
751         default:
752                 dev_err(info->dev,
753                         "failed to detect %s accessory (adc:0x%x)\n",
754                         attached ? "attached" : "detached", cable_type);
755                 return -EINVAL;
756         }
757
758         return 0;
759 }
760
761 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
762 {
763         int chg_type;
764         int cable_type_gnd;
765         int cable_type;
766         bool attached;
767         bool cable_attached;
768         int ret = 0;
769
770         chg_type = max77693_muic_get_cable_type(info,
771                                 MAX77693_CABLE_GROUP_CHG, &attached);
772
773         dev_info(info->dev,
774                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
775                         attached ? "attached" : "detached",
776                         chg_type, info->prev_chg_type);
777
778         switch (chg_type) {
779         case MAX77693_CHARGER_TYPE_USB:
780         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
781         case MAX77693_CHARGER_TYPE_NONE:
782                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
783                 cable_type_gnd = max77693_muic_get_cable_type(info,
784                                         MAX77693_CABLE_GROUP_ADC_GND,
785                                         &cable_attached);
786                 switch (cable_type_gnd) {
787                 case MAX77693_MUIC_GND_MHL:
788                 case MAX77693_MUIC_GND_MHL_VB:
789                         /*
790                          * MHL cable with USB/TA cable
791                          * - MHL cable include two port(HDMI line and separate
792                          * micro-usb port. When the target connect MHL cable,
793                          * extcon driver check whether USB/TA cable is
794                          * connected. If USB/TA cable is connected, extcon
795                          * driver notify state to notifiee for charging battery.
796                          *
797                          * Features of 'USB/TA with MHL cable'
798                          * - Support MHL
799                          * - Support charging through micro-usb port without
800                          *   data connection
801                          */
802                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
803                                                 attached);
804                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
805                                                 cable_attached);
806                         break;
807                 }
808
809                 /* Check MAX77693_CABLE_GROUP_ADC type */
810                 cable_type = max77693_muic_get_cable_type(info,
811                                         MAX77693_CABLE_GROUP_ADC,
812                                         &cable_attached);
813                 switch (cable_type) {
814                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
815                         /*
816                          * Dock-Audio device with USB/TA cable
817                          * - Dock device include two port(Dock-Audio and micro-
818                          * usb port). When the target connect Dock-Audio device,
819                          * extcon driver check whether USB/TA cable is connected
820                          * or not. If USB/TA cable is connected, extcon driver
821                          * notify state to notifiee for charging battery.
822                          *
823                          * Features of 'USB/TA cable with Dock-Audio device'
824                          * - Support external output feature of audio.
825                          * - Support charging through micro-usb port without
826                          *   data connection.
827                          */
828                         extcon_set_state_sync(info->edev, EXTCON_USB,
829                                                 attached);
830                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
831                                                 attached);
832
833                         if (!cable_attached)
834                                 extcon_set_state_sync(info->edev, EXTCON_DOCK,
835                                                         cable_attached);
836                         break;
837                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
838                         /*
839                          * Dock-Smart device with USB/TA cable
840                          * - Dock-Desk device include three type of cable which
841                          * are HDMI, USB for mouse/keyboard and micro-usb port
842                          * for USB/TA cable. Dock-Smart device need always
843                          * exteranl power supply(USB/TA cable through micro-usb
844                          * cable). Dock-Smart device support screen output of
845                          * target to separate monitor and mouse/keyboard for
846                          * desktop mode.
847                          *
848                          * Features of 'USB/TA cable with Dock-Smart device'
849                          * - Support MHL
850                          * - Support external output feature of audio
851                          * - Support charging through micro-usb port without
852                          *   data connection if TA cable is connected to target.
853                          * - Support charging and data connection through micro-
854                          *   usb port if USB cable is connected between target
855                          *   and host device
856                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
857                          */
858                         ret = max77693_muic_set_path(info, info->path_usb,
859                                                     attached);
860                         if (ret < 0)
861                                 return ret;
862
863                         extcon_set_state_sync(info->edev, EXTCON_DOCK,
864                                                 attached);
865                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
866                                                 attached);
867                         break;
868                 }
869
870                 /* Check MAX77693_CABLE_GROUP_CHG type */
871                 switch (chg_type) {
872                 case MAX77693_CHARGER_TYPE_NONE:
873                         /*
874                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
875                          * cable is attached, muic device happen below two irq.
876                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
877                          *    MHL/Dock-Audio.
878                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
879                          *    USB/TA cable connected to MHL or Dock-Audio.
880                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
881                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
882                          *
883                          * If user attach MHL (with USB/TA cable and immediately
884                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
885                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
886                          * connected state to target. But USB/TA cable isn't
887                          * connected to target. The user be face with unusual
888                          * action. So, driver should check this situation in
889                          * spite of, that previous charger type is N/A.
890                          */
891                         break;
892                 case MAX77693_CHARGER_TYPE_USB:
893                         /* Only USB cable, PATH:AP_USB */
894                         ret = max77693_muic_set_path(info, info->path_usb,
895                                                     attached);
896                         if (ret < 0)
897                                 return ret;
898
899                         extcon_set_state_sync(info->edev, EXTCON_USB,
900                                                 attached);
901                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
902                                                 attached);
903                         break;
904                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
905                         /* Only TA cable */
906                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
907                                                 attached);
908                         break;
909                 }
910                 break;
911         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
912                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
913                                         attached);
914                 break;
915         case MAX77693_CHARGER_TYPE_APPLE_500MA:
916                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
917                                         attached);
918                 break;
919         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
920                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
921                                         attached);
922                 break;
923         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
924                 break;
925         default:
926                 dev_err(info->dev,
927                         "failed to detect %s accessory (chg_type:0x%x)\n",
928                         attached ? "attached" : "detached", chg_type);
929                 return -EINVAL;
930         }
931
932         return 0;
933 }
934
935 static void max77693_muic_irq_work(struct work_struct *work)
936 {
937         struct max77693_muic_info *info = container_of(work,
938                         struct max77693_muic_info, irq_work);
939         int irq_type = -1;
940         int i, ret = 0;
941
942         if (!info->edev)
943                 return;
944
945         mutex_lock(&info->mutex);
946
947         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
948                 if (info->irq == muic_irqs[i].virq)
949                         irq_type = muic_irqs[i].irq;
950
951         ret = regmap_bulk_read(info->max77693->regmap_muic,
952                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
953         if (ret) {
954                 dev_err(info->dev, "failed to read MUIC register\n");
955                 mutex_unlock(&info->mutex);
956                 return;
957         }
958
959         switch (irq_type) {
960         case MAX77693_MUIC_IRQ_INT1_ADC:
961         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
962         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
963         case MAX77693_MUIC_IRQ_INT1_ADC1K:
964                 /*
965                  * Handle all of accessory except for
966                  * type of charger accessory.
967                  */
968                 ret = max77693_muic_adc_handler(info);
969                 break;
970         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
971         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
972         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
973         case MAX77693_MUIC_IRQ_INT2_DXOVP:
974         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
975         case MAX77693_MUIC_IRQ_INT2_VIDRM:
976                 /* Handle charger accessory */
977                 ret = max77693_muic_chg_handler(info);
978                 break;
979         case MAX77693_MUIC_IRQ_INT3_EOC:
980         case MAX77693_MUIC_IRQ_INT3_CGMBC:
981         case MAX77693_MUIC_IRQ_INT3_OVP:
982         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
983         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
984         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
985                 break;
986         default:
987                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
988                                 irq_type);
989                 mutex_unlock(&info->mutex);
990                 return;
991         }
992
993         if (ret < 0)
994                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
995
996         mutex_unlock(&info->mutex);
997 }
998
999 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1000 {
1001         struct max77693_muic_info *info = data;
1002
1003         info->irq = irq;
1004         schedule_work(&info->irq_work);
1005
1006         return IRQ_HANDLED;
1007 }
1008
1009 static const struct regmap_config max77693_muic_regmap_config = {
1010         .reg_bits = 8,
1011         .val_bits = 8,
1012 };
1013
1014 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1015 {
1016         int ret = 0;
1017         int adc;
1018         int chg_type;
1019         bool attached;
1020
1021         mutex_lock(&info->mutex);
1022
1023         /* Read STATUSx register to detect accessory */
1024         ret = regmap_bulk_read(info->max77693->regmap_muic,
1025                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1026         if (ret) {
1027                 dev_err(info->dev, "failed to read MUIC register\n");
1028                 mutex_unlock(&info->mutex);
1029                 return ret;
1030         }
1031
1032         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1033                                         &attached);
1034         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1035                 ret = max77693_muic_adc_handler(info);
1036                 if (ret < 0) {
1037                         dev_err(info->dev, "Cannot detect accessory\n");
1038                         mutex_unlock(&info->mutex);
1039                         return ret;
1040                 }
1041         }
1042
1043         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1044                                         &attached);
1045         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1046                 ret = max77693_muic_chg_handler(info);
1047                 if (ret < 0) {
1048                         dev_err(info->dev, "Cannot detect charger accessory\n");
1049                         mutex_unlock(&info->mutex);
1050                         return ret;
1051                 }
1052         }
1053
1054         mutex_unlock(&info->mutex);
1055
1056         return 0;
1057 }
1058
1059 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1060 {
1061         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1062                                 struct max77693_muic_info, wq_detcable);
1063
1064         max77693_muic_detect_accessory(info);
1065 }
1066
1067 static int max77693_muic_probe(struct platform_device *pdev)
1068 {
1069         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1070         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1071         struct max77693_muic_info *info;
1072         struct max77693_reg_data *init_data;
1073         int num_init_data;
1074         int delay_jiffies;
1075         int cable_type;
1076         bool attached;
1077         int ret;
1078         int i;
1079         unsigned int id;
1080
1081         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1082                                    GFP_KERNEL);
1083         if (!info)
1084                 return -ENOMEM;
1085
1086         info->dev = &pdev->dev;
1087         info->max77693 = max77693;
1088         if (info->max77693->regmap_muic) {
1089                 dev_dbg(&pdev->dev, "allocate register map\n");
1090         } else {
1091                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1092                                                 info->max77693->i2c_muic,
1093                                                 &max77693_muic_regmap_config);
1094                 if (IS_ERR(info->max77693->regmap_muic)) {
1095                         ret = PTR_ERR(info->max77693->regmap_muic);
1096                         dev_err(max77693->dev,
1097                                 "failed to allocate register map: %d\n", ret);
1098                         return ret;
1099                 }
1100         }
1101
1102         /* Register input device for button of dock device */
1103         info->dock = devm_input_allocate_device(&pdev->dev);
1104         if (!info->dock) {
1105                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1106                 return -ENOMEM;
1107         }
1108         info->dock->name = "max77693-muic/dock";
1109         info->dock->phys = "max77693-muic/extcon";
1110         info->dock->dev.parent = &pdev->dev;
1111
1112         __set_bit(EV_REP, info->dock->evbit);
1113
1114         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1115         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1116         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1117         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1118         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1119
1120         ret = input_register_device(info->dock);
1121         if (ret < 0) {
1122                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1123                                 ret);
1124                 return ret;
1125         }
1126
1127         platform_set_drvdata(pdev, info);
1128         mutex_init(&info->mutex);
1129
1130         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1131
1132         /* Support irq domain for MAX77693 MUIC device */
1133         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1134                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1135                 int virq;
1136
1137                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1138                                         muic_irq->irq);
1139                 if (virq <= 0)
1140                         return -EINVAL;
1141                 muic_irq->virq = virq;
1142
1143                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1144                                 max77693_muic_irq_handler,
1145                                 IRQF_NO_SUSPEND,
1146                                 muic_irq->name, info);
1147                 if (ret) {
1148                         dev_err(&pdev->dev,
1149                                 "failed: irq request (IRQ: %d, error :%d)\n",
1150                                 muic_irq->irq, ret);
1151                         return ret;
1152                 }
1153         }
1154
1155         /* Initialize extcon device */
1156         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1157                                               max77693_extcon_cable);
1158         if (IS_ERR(info->edev)) {
1159                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1160                 return -ENOMEM;
1161         }
1162
1163         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1164         if (ret) {
1165                 dev_err(&pdev->dev, "failed to register extcon device\n");
1166                 return ret;
1167         }
1168
1169         /* Initialize MUIC register by using platform data or default data */
1170         if (pdata && pdata->muic_data) {
1171                 init_data = pdata->muic_data->init_data;
1172                 num_init_data = pdata->muic_data->num_init_data;
1173         } else {
1174                 init_data = default_init_data;
1175                 num_init_data = ARRAY_SIZE(default_init_data);
1176         }
1177
1178         for (i = 0; i < num_init_data; i++) {
1179                 regmap_write(info->max77693->regmap_muic,
1180                                 init_data[i].addr,
1181                                 init_data[i].data);
1182         }
1183
1184         if (pdata && pdata->muic_data) {
1185                 struct max77693_muic_platform_data *muic_pdata
1186                                                    = pdata->muic_data;
1187
1188                 /*
1189                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1190                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1191                  */
1192                 if (muic_pdata->path_uart)
1193                         info->path_uart = muic_pdata->path_uart;
1194                 else
1195                         info->path_uart = MAX77693_CONTROL1_SW_UART;
1196
1197                 if (muic_pdata->path_usb)
1198                         info->path_usb = muic_pdata->path_usb;
1199                 else
1200                         info->path_usb = MAX77693_CONTROL1_SW_USB;
1201
1202                 /*
1203                  * Default delay time for detecting cable state
1204                  * after certain time.
1205                  */
1206                 if (muic_pdata->detcable_delay_ms)
1207                         delay_jiffies =
1208                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1209                 else
1210                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1211         } else {
1212                 info->path_usb = MAX77693_CONTROL1_SW_USB;
1213                 info->path_uart = MAX77693_CONTROL1_SW_UART;
1214                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1215         }
1216
1217         /* Set initial path for UART when JIG is connected to get serial logs */
1218         ret = regmap_bulk_read(info->max77693->regmap_muic,
1219                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1220         if (ret) {
1221                 dev_err(info->dev, "failed to read MUIC register\n");
1222                 return ret;
1223         }
1224         cable_type = max77693_muic_get_cable_type(info,
1225                                            MAX77693_CABLE_GROUP_ADC, &attached);
1226         if (attached && (cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON ||
1227                          cable_type == MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF))
1228                 max77693_muic_set_path(info, info->path_uart, true);
1229
1230         /* Check revision number of MUIC device*/
1231         ret = regmap_read(info->max77693->regmap_muic,
1232                         MAX77693_MUIC_REG_ID, &id);
1233         if (ret < 0) {
1234                 dev_err(&pdev->dev, "failed to read revision number\n");
1235                 return ret;
1236         }
1237         dev_info(info->dev, "device ID : 0x%x\n", id);
1238
1239         /* Set ADC debounce time */
1240         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1241
1242         /*
1243          * Detect accessory after completing the initialization of platform
1244          *
1245          * - Use delayed workqueue to detect cable state and then
1246          * notify cable state to notifiee/platform through uevent.
1247          * After completing the booting of platform, the extcon provider
1248          * driver should notify cable state to upper layer.
1249          */
1250         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1251         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1252                         delay_jiffies);
1253
1254         return ret;
1255 }
1256
1257 static int max77693_muic_remove(struct platform_device *pdev)
1258 {
1259         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1260
1261         cancel_work_sync(&info->irq_work);
1262         input_unregister_device(info->dock);
1263
1264         return 0;
1265 }
1266
1267 static struct platform_driver max77693_muic_driver = {
1268         .driver         = {
1269                 .name   = DEV_NAME,
1270         },
1271         .probe          = max77693_muic_probe,
1272         .remove         = max77693_muic_remove,
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:extcon-max77693");