Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

Linux/drivers/extcon/extcon-max77693.c

  1 /*
  2  * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
  3  *
  4  * Copyright (C) 2012 Samsung Electrnoics
  5  * Chanwoo Choi <cw00.choi@samsung.com>
  6  *
  7  * This program is free software; you can redistribute it and/or modify
  8  * it under the terms of the GNU General Public License as published by
  9  * the Free Software Foundation; either version 2 of the License, or
 10  * (at your option) any later version.
 11  *
 12  * This program is distributed in the hope that it will be useful,
 13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  * GNU General Public License for more details.
 16  */
 17 
 18 #include <linux/kernel.h>
 19 #include <linux/module.h>
 20 #include <linux/i2c.h>
 21 #include <linux/slab.h>
 22 #include <linux/input.h>
 23 #include <linux/interrupt.h>
 24 #include <linux/err.h>
 25 #include <linux/platform_device.h>
 26 #include <linux/mfd/max77693.h>
 27 #include <linux/mfd/max77693-private.h>
 28 #include <linux/extcon.h>
 29 #include <linux/regmap.h>
 30 #include <linux/irqdomain.h>
 31 
 32 #define DEV_NAME                        "max77693-muic"
 33 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
 34 
 35 /*
 36  * Default value of MAX77693 register to bring up MUIC device.
 37  * If user don't set some initial value for MUIC device through platform data,
 38  * extcon-max77693 driver use 'default_init_data' to bring up base operation
 39  * of MAX77693 MUIC device.
 40  */
 41 static struct max77693_reg_data default_init_data[] = {
 42         {
 43                 /* STATUS2 - [3]ChgDetRun */
 44                 .addr = MAX77693_MUIC_REG_STATUS2,
 45                 .data = STATUS2_CHGDETRUN_MASK,
 46         }, {
 47                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
 48                 .addr = MAX77693_MUIC_REG_INTMASK1,
 49                 .data = INTMASK1_ADC1K_MASK
 50                         | INTMASK1_ADC_MASK,
 51         }, {
 52                 /* INTMASK2 - Unmask [0]ChgTypM */
 53                 .addr = MAX77693_MUIC_REG_INTMASK2,
 54                 .data = INTMASK2_CHGTYP_MASK,
 55         }, {
 56                 /* INTMASK3 - Mask all of interrupts */
 57                 .addr = MAX77693_MUIC_REG_INTMASK3,
 58                 .data = 0x0,
 59         }, {
 60                 /* CDETCTRL2 */
 61                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
 62                 .data = CDETCTRL2_VIDRMEN_MASK
 63                         | CDETCTRL2_DXOVPEN_MASK,
 64         },
 65 };
 66 
 67 enum max77693_muic_adc_debounce_time {
 68         ADC_DEBOUNCE_TIME_5MS = 0,
 69         ADC_DEBOUNCE_TIME_10MS,
 70         ADC_DEBOUNCE_TIME_25MS,
 71         ADC_DEBOUNCE_TIME_38_62MS,
 72 };
 73 
 74 struct max77693_muic_info {
 75         struct device *dev;
 76         struct max77693_dev *max77693;
 77         struct extcon_dev *edev;
 78         int prev_cable_type;
 79         int prev_cable_type_gnd;
 80         int prev_chg_type;
 81         int prev_button_type;
 82         u8 status[2];
 83 
 84         int irq;
 85         struct work_struct irq_work;
 86         struct mutex mutex;
 87 
 88         /*
 89          * Use delayed workqueue to detect cable state and then
 90          * notify cable state to notifiee/platform through uevent.
 91          * After completing the booting of platform, the extcon provider
 92          * driver should notify cable state to upper layer.
 93          */
 94         struct delayed_work wq_detcable;
 95 
 96         /* Button of dock device */
 97         struct input_dev *dock;
 98 
 99         /*
100          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
101          * h/w path of COMP2/COMN1 on CONTROL1 register.
102          */
103         int path_usb;
104         int path_uart;
105 };
106 
107 enum max77693_muic_cable_group {
108         MAX77693_CABLE_GROUP_ADC = 0,
109         MAX77693_CABLE_GROUP_ADC_GND,
110         MAX77693_CABLE_GROUP_CHG,
111         MAX77693_CABLE_GROUP_VBVOLT,
112 };
113 
114 enum max77693_muic_charger_type {
115         MAX77693_CHARGER_TYPE_NONE = 0,
116         MAX77693_CHARGER_TYPE_USB,
117         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
118         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
119         MAX77693_CHARGER_TYPE_APPLE_500MA,
120         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
121         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
122 };
123 
124 /**
125  * struct max77693_muic_irq
126  * @irq: the index of irq list of MUIC device.
127  * @name: the name of irq.
128  * @virq: the virtual irq to use irq domain
129  */
130 struct max77693_muic_irq {
131         unsigned int irq;
132         const char *name;
133         unsigned int virq;
134 };
135 
136 static struct max77693_muic_irq muic_irqs[] = {
137         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
138         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
139         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
140         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
141         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
142         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
143         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
144         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
145         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
146         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
147         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
148         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
149         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
150         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
151         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
152         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
153 };
154 
155 /* Define supported accessory type */
156 enum max77693_muic_acc_type {
157         MAX77693_MUIC_ADC_GROUND = 0x0,
158         MAX77693_MUIC_ADC_SEND_END_BUTTON,
159         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
160         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
161         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
162         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
163         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
164         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
165         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
166         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
167         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
168         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
169         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
170         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
171         MAX77693_MUIC_ADC_RESERVED_ACC_1,
172         MAX77693_MUIC_ADC_RESERVED_ACC_2,
173         MAX77693_MUIC_ADC_RESERVED_ACC_3,
174         MAX77693_MUIC_ADC_RESERVED_ACC_4,
175         MAX77693_MUIC_ADC_RESERVED_ACC_5,
176         MAX77693_MUIC_ADC_CEA936_AUDIO,
177         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
178         MAX77693_MUIC_ADC_TTY_CONVERTER,
179         MAX77693_MUIC_ADC_UART_CABLE,
180         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
181         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
182         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
183         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
184         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
185         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
186         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
187         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
188         MAX77693_MUIC_ADC_OPEN,
189 
190         /* The below accessories have same ADC value so ADCLow and
191            ADC1K bit is used to separate specific accessory */
192                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
193         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
194         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
195         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
196         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
197         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
198 };
199 
200 /*
201  * MAX77693 MUIC device support below list of accessories(external connector)
202  */
203 static const unsigned int max77693_extcon_cable[] = {
204         EXTCON_USB,
205         EXTCON_USB_HOST,
206         EXTCON_TA,
207         EXTCON_FAST_CHARGER,
208         EXTCON_SLOW_CHARGER,
209         EXTCON_CHARGE_DOWNSTREAM,
210         EXTCON_MHL,
211         EXTCON_JIG,
212         EXTCON_DOCK,
213         EXTCON_NONE,
214 };
215 
216 /*
217  * max77693_muic_set_debounce_time - Set the debounce time of ADC
218  * @info: the instance including private data of max77693 MUIC
219  * @time: the debounce time of ADC
220  */
221 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
222                 enum max77693_muic_adc_debounce_time time)
223 {
224         int ret;
225 
226         switch (time) {
227         case ADC_DEBOUNCE_TIME_5MS:
228         case ADC_DEBOUNCE_TIME_10MS:
229         case ADC_DEBOUNCE_TIME_25MS:
230         case ADC_DEBOUNCE_TIME_38_62MS:
231                 /*
232                  * Don't touch BTLDset, JIGset when you want to change adc
233                  * debounce time. If it writes other than 0 to BTLDset, JIGset
234                  * muic device will be reset and loose current state.
235                  */
236                 ret = regmap_write(info->max77693->regmap_muic,
237                                   MAX77693_MUIC_REG_CTRL3,
238                                   time << CONTROL3_ADCDBSET_SHIFT);
239                 if (ret) {
240                         dev_err(info->dev, "failed to set ADC debounce time\n");
241                         return ret;
242                 }
243                 break;
244         default:
245                 dev_err(info->dev, "invalid ADC debounce time\n");
246                 return -EINVAL;
247         }
248 
249         return 0;
250 };
251 
252 /*
253  * max77693_muic_set_path - Set hardware line according to attached cable
254  * @info: the instance including private data of max77693 MUIC
255  * @value: the path according to attached cable
256  * @attached: the state of cable (true:attached, false:detached)
257  *
258  * The max77693 MUIC device share outside H/W line among a varity of cables
259  * so, this function set internal path of H/W line according to the type of
260  * attached cable.
261  */
262 static int max77693_muic_set_path(struct max77693_muic_info *info,
263                 u8 val, bool attached)
264 {
265         int ret = 0;
266         unsigned int ctrl1, ctrl2 = 0;
267 
268         if (attached)
269                 ctrl1 = val;
270         else
271                 ctrl1 = CONTROL1_SW_OPEN;
272 
273         ret = regmap_update_bits(info->max77693->regmap_muic,
274                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
275         if (ret < 0) {
276                 dev_err(info->dev, "failed to update MUIC register\n");
277                 return ret;
278         }
279 
280         if (attached)
281                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
282         else
283                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
284 
285         ret = regmap_update_bits(info->max77693->regmap_muic,
286                         MAX77693_MUIC_REG_CTRL2,
287                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
288         if (ret < 0) {
289                 dev_err(info->dev, "failed to update MUIC register\n");
290                 return ret;
291         }
292 
293         dev_info(info->dev,
294                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
295                 ctrl1, ctrl2, attached ? "attached" : "detached");
296 
297         return 0;
298 }
299 
300 /*
301  * max77693_muic_get_cable_type - Return cable type and check cable state
302  * @info: the instance including private data of max77693 MUIC
303  * @group: the path according to attached cable
304  * @attached: store cable state and return
305  *
306  * This function check the cable state either attached or detached,
307  * and then divide precise type of cable according to cable group.
308  *      - MAX77693_CABLE_GROUP_ADC
309  *      - MAX77693_CABLE_GROUP_ADC_GND
310  *      - MAX77693_CABLE_GROUP_CHG
311  *      - MAX77693_CABLE_GROUP_VBVOLT
312  */
313 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
314                 enum max77693_muic_cable_group group, bool *attached)
315 {
316         int cable_type = 0;
317         int adc;
318         int adc1k;
319         int adclow;
320         int vbvolt;
321         int chg_type;
322 
323         switch (group) {
324         case MAX77693_CABLE_GROUP_ADC:
325                 /*
326                  * Read ADC value to check cable type and decide cable state
327                  * according to cable type
328                  */
329                 adc = info->status[0] & STATUS1_ADC_MASK;
330                 adc >>= STATUS1_ADC_SHIFT;
331 
332                 /*
333                  * Check current cable state/cable type and store cable type
334                  * (info->prev_cable_type) for handling cable when cable is
335                  * detached.
336                  */
337                 if (adc == MAX77693_MUIC_ADC_OPEN) {
338                         *attached = false;
339 
340                         cable_type = info->prev_cable_type;
341                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
342                 } else {
343                         *attached = true;
344 
345                         cable_type = info->prev_cable_type = adc;
346                 }
347                 break;
348         case MAX77693_CABLE_GROUP_ADC_GND:
349                 /*
350                  * Read ADC value to check cable type and decide cable state
351                  * according to cable type
352                  */
353                 adc = info->status[0] & STATUS1_ADC_MASK;
354                 adc >>= STATUS1_ADC_SHIFT;
355 
356                 /*
357                  * Check current cable state/cable type and store cable type
358                  * (info->prev_cable_type/_gnd) for handling cable when cable
359                  * is detached.
360                  */
361                 if (adc == MAX77693_MUIC_ADC_OPEN) {
362                         *attached = false;
363 
364                         cable_type = info->prev_cable_type_gnd;
365                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
366                 } else {
367                         *attached = true;
368 
369                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
370                         adclow >>= STATUS1_ADCLOW_SHIFT;
371                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
372                         adc1k >>= STATUS1_ADC1K_SHIFT;
373 
374                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
375                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
376 
377                         /**
378                          * [0x1|VBVolt|ADCLow|ADC1K]
379                          * [0x1|     0|     0|    0] USB_HOST
380                          * [0x1|     1|     0|    0] USB_HSOT_VB
381                          * [0x1|     0|     1|    0] Audio Video cable with load
382                          * [0x1|     0|     1|    1] MHL without charging cable
383                          * [0x1|     1|     1|    1] MHL with charging cable
384                          */
385                         cable_type = ((0x1 << 8)
386                                         | (vbvolt << 2)
387                                         | (adclow << 1)
388                                         | adc1k);
389 
390                         info->prev_cable_type = adc;
391                         info->prev_cable_type_gnd = cable_type;
392                 }
393 
394                 break;
395         case MAX77693_CABLE_GROUP_CHG:
396                 /*
397                  * Read charger type to check cable type and decide cable state
398                  * according to type of charger cable.
399                  */
400                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
401                 chg_type >>= STATUS2_CHGTYP_SHIFT;
402 
403                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
404                         *attached = false;
405 
406                         cable_type = info->prev_chg_type;
407                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
408                 } else {
409                         *attached = true;
410 
411                         /*
412                          * Check current cable state/cable type and store cable
413                          * type(info->prev_chg_type) for handling cable when
414                          * charger cable is detached.
415                          */
416                         cable_type = info->prev_chg_type = chg_type;
417                 }
418 
419                 break;
420         case MAX77693_CABLE_GROUP_VBVOLT:
421                 /*
422                  * Read ADC value to check cable type and decide cable state
423                  * according to cable type
424                  */
425                 adc = info->status[0] & STATUS1_ADC_MASK;
426                 adc >>= STATUS1_ADC_SHIFT;
427                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
428                 chg_type >>= STATUS2_CHGTYP_SHIFT;
429 
430                 if (adc == MAX77693_MUIC_ADC_OPEN
431                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
432                         *attached = false;
433                 else
434                         *attached = true;
435 
436                 /*
437                  * Read vbvolt field, if vbvolt is 1,
438                  * this cable is used for charging.
439                  */
440                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
441                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
442 
443                 cable_type = vbvolt;
444                 break;
445         default:
446                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
447                 cable_type = -EINVAL;
448                 break;
449         }
450 
451         return cable_type;
452 }
453 
454 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
455                 int cable_type, bool attached)
456 {
457         int ret = 0;
458         int vbvolt;
459         bool cable_attached;
460         unsigned int dock_id;
461 
462         dev_info(info->dev,
463                 "external connector is %s (adc:0x%02x)\n",
464                 attached ? "attached" : "detached", cable_type);
465 
466         switch (cable_type) {
467         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
468                 /*
469                  * Check power cable whether attached or detached state.
470                  * The Dock-Smart device need surely external power supply.
471                  * If power cable(USB/TA) isn't connected to Dock device,
472                  * user can't use Dock-Smart for desktop mode.
473                  */
474                 vbvolt = max77693_muic_get_cable_type(info,
475                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
476                 if (attached && !vbvolt) {
477                         dev_warn(info->dev,
478                                 "Cannot detect external power supply\n");
479                         return 0;
480                 }
481 
482                 /*
483                  * Notify Dock/MHL state.
484                  * - Dock device include three type of cable which
485                  * are HDMI, USB for mouse/keyboard and micro-usb port
486                  * for USB/TA cable. Dock device need always exteranl
487                  * power supply(USB/TA cable through micro-usb cable). Dock
488                  * device support screen output of target to separate
489                  * monitor and mouse/keyboard for desktop mode.
490                  *
491                  * Features of 'USB/TA cable with Dock device'
492                  * - Support MHL
493                  * - Support external output feature of audio
494                  * - Support charging through micro-usb port without data
495                  *           connection if TA cable is connected to target.
496                  * - Support charging and data connection through micro-usb port
497                  *           if USB cable is connected between target and host
498                  *           device.
499                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
500                  */
501                 ret = max77693_muic_set_path(info, info->path_usb, attached);
502                 if (ret < 0)
503                         return ret;
504 
505                 extcon_set_cable_state_(info->edev, EXTCON_DOCK, attached);
506                 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
507                 goto out;
508         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
509                 dock_id = EXTCON_DOCK;
510                 break;
511         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
512                 dock_id = EXTCON_DOCK;
513                 if (!attached)
514                         extcon_set_cable_state_(info->edev, EXTCON_USB, false);
515                 break;
516         default:
517                 dev_err(info->dev, "failed to detect %s dock device\n",
518                         attached ? "attached" : "detached");
519                 return -EINVAL;
520         }
521 
522         /* Dock-Car/Desk/Audio, PATH:AUDIO */
523         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
524         if (ret < 0)
525                 return ret;
526         extcon_set_cable_state_(info->edev, dock_id, attached);
527 
528 out:
529         return 0;
530 }
531 
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 
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, CONTROL1_SW_USB, attached);
589                 if (ret < 0)
590                         return ret;
591                 extcon_set_cable_state_(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, CONTROL1_SW_AUDIO, attached);
596                 if (ret < 0)
597                         return ret;
598                 extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
599                 break;
600         case MAX77693_MUIC_GND_MHL:
601         case MAX77693_MUIC_GND_MHL_VB:
602                 /* MHL or MHL with USB/TA cable */
603                 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
604                 break;
605         default:
606                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
607                         attached ? "attached" : "detached");
608                 return -EINVAL;
609         }
610 
611         return 0;
612 }
613 
614 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
615                 int cable_type, bool attached)
616 {
617         int ret = 0;
618         u8 path = CONTROL1_SW_OPEN;
619 
620         dev_info(info->dev,
621                 "external connector is %s (adc:0x%02x)\n",
622                 attached ? "attached" : "detached", cable_type);
623 
624         switch (cable_type) {
625         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
626         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
627                 /* PATH:AP_USB */
628                 path = CONTROL1_SW_USB;
629                 break;
630         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
631         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
632                 /* PATH:AP_UART */
633                 path = CONTROL1_SW_UART;
634                 break;
635         default:
636                 dev_err(info->dev, "failed to detect %s jig cable\n",
637                         attached ? "attached" : "detached");
638                 return -EINVAL;
639         }
640 
641         ret = max77693_muic_set_path(info, path, attached);
642         if (ret < 0)
643                 return ret;
644 
645         extcon_set_cable_state_(info->edev, EXTCON_JIG, attached);
646 
647         return 0;
648 }
649 
650 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
651 {
652         int cable_type;
653         int button_type;
654         bool attached;
655         int ret = 0;
656 
657         /* Check accessory state which is either detached or attached */
658         cable_type = max77693_muic_get_cable_type(info,
659                                 MAX77693_CABLE_GROUP_ADC, &attached);
660 
661         dev_info(info->dev,
662                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
663                 attached ? "attached" : "detached", cable_type,
664                 info->prev_cable_type);
665 
666         switch (cable_type) {
667         case MAX77693_MUIC_ADC_GROUND:
668                 /* USB_HOST/MHL/Audio */
669                 max77693_muic_adc_ground_handler(info);
670                 break;
671         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
672         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
673         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
674         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
675                 /* JIG */
676                 ret = max77693_muic_jig_handler(info, cable_type, attached);
677                 if (ret < 0)
678                         return ret;
679                 break;
680         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
681         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
682         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
683                 /*
684                  * DOCK device
685                  *
686                  * The MAX77693 MUIC device can detect total 34 cable type
687                  * except of charger cable and MUIC device didn't define
688                  * specfic role of cable in the range of from 0x01 to 0x12
689                  * of ADC value. So, can use/define cable with no role according
690                  * to schema of hardware board.
691                  */
692                 ret = max77693_muic_dock_handler(info, cable_type, attached);
693                 if (ret < 0)
694                         return ret;
695                 break;
696         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
697         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
698         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
699         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
700         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
701                 /*
702                  * Button of DOCK device
703                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
704                  *
705                  * The MAX77693 MUIC device can detect total 34 cable type
706                  * except of charger cable and MUIC device didn't define
707                  * specfic role of cable in the range of from 0x01 to 0x12
708                  * of ADC value. So, can use/define cable with no role according
709                  * to schema of hardware board.
710                  */
711                 if (attached)
712                         button_type = info->prev_button_type = cable_type;
713                 else
714                         button_type = info->prev_button_type;
715 
716                 ret = max77693_muic_dock_button_handler(info, button_type,
717                                                         attached);
718                 if (ret < 0)
719                         return ret;
720                 break;
721         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
722         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
723         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
724         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
725         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
726         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
727         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
728         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
729         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
730         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
731         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
732         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
733         case MAX77693_MUIC_ADC_CEA936_AUDIO:
734         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
735         case MAX77693_MUIC_ADC_TTY_CONVERTER:
736         case MAX77693_MUIC_ADC_UART_CABLE:
737         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
738         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
739                 /*
740                  * This accessory isn't used in general case if it is specially
741                  * needed to detect additional accessory, should implement
742                  * proper operation when this accessory is attached/detached.
743                  */
744                 dev_info(info->dev,
745                         "accessory is %s but it isn't used (adc:0x%x)\n",
746                         attached ? "attached" : "detached", cable_type);
747                 return -EAGAIN;
748         default:
749                 dev_err(info->dev,
750                         "failed to detect %s accessory (adc:0x%x)\n",
751                         attached ? "attached" : "detached", cable_type);
752                 return -EINVAL;
753         }
754 
755         return 0;
756 }
757 
758 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
759 {
760         int chg_type;
761         int cable_type_gnd;
762         int cable_type;
763         bool attached;
764         bool cable_attached;
765         int ret = 0;
766 
767         chg_type = max77693_muic_get_cable_type(info,
768                                 MAX77693_CABLE_GROUP_CHG, &attached);
769 
770         dev_info(info->dev,
771                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
772                         attached ? "attached" : "detached",
773                         chg_type, info->prev_chg_type);
774 
775         switch (chg_type) {
776         case MAX77693_CHARGER_TYPE_USB:
777         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
778         case MAX77693_CHARGER_TYPE_NONE:
779                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
780                 cable_type_gnd = max77693_muic_get_cable_type(info,
781                                         MAX77693_CABLE_GROUP_ADC_GND,
782                                         &cable_attached);
783                 switch (cable_type_gnd) {
784                 case MAX77693_MUIC_GND_MHL:
785                 case MAX77693_MUIC_GND_MHL_VB:
786                         /*
787                          * MHL cable with USB/TA cable
788                          * - MHL cable include two port(HDMI line and separate
789                          * micro-usb port. When the target connect MHL cable,
790                          * extcon driver check whether USB/TA cable is
791                          * connected. If USB/TA cable is connected, extcon
792                          * driver notify state to notifiee for charging battery.
793                          *
794                          * Features of 'USB/TA with MHL cable'
795                          * - Support MHL
796                          * - Support charging through micro-usb port without
797                          *   data connection
798                          */
799                         extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
800                         if (!cable_attached)
801                                 extcon_set_cable_state_(info->edev, EXTCON_MHL,
802                                                         cable_attached);
803                         break;
804                 }
805 
806                 /* Check MAX77693_CABLE_GROUP_ADC type */
807                 cable_type = max77693_muic_get_cable_type(info,
808                                         MAX77693_CABLE_GROUP_ADC,
809                                         &cable_attached);
810                 switch (cable_type) {
811                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
812                         /*
813                          * Dock-Audio device with USB/TA cable
814                          * - Dock device include two port(Dock-Audio and micro-
815                          * usb port). When the target connect Dock-Audio device,
816                          * extcon driver check whether USB/TA cable is connected
817                          * or not. If USB/TA cable is connected, extcon driver
818                          * notify state to notifiee for charging battery.
819                          *
820                          * Features of 'USB/TA cable with Dock-Audio device'
821                          * - Support external output feature of audio.
822                          * - Support charging through micro-usb port without
823                          *   data connection.
824                          */
825                         extcon_set_cable_state_(info->edev, EXTCON_USB,
826                                                 attached);
827 
828                         if (!cable_attached)
829                                 extcon_set_cable_state_(info->edev, EXTCON_DOCK,
830                                                         cable_attached);
831                         break;
832                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
833                         /*
834                          * Dock-Smart device with USB/TA cable
835                          * - Dock-Desk device include three type of cable which
836                          * are HDMI, USB for mouse/keyboard and micro-usb port
837                          * for USB/TA cable. Dock-Smart device need always
838                          * exteranl power supply(USB/TA cable through micro-usb
839                          * cable). Dock-Smart device support screen output of
840                          * target to separate monitor and mouse/keyboard for
841                          * desktop mode.
842                          *
843                          * Features of 'USB/TA cable with Dock-Smart device'
844                          * - Support MHL
845                          * - Support external output feature of audio
846                          * - Support charging through micro-usb port without
847                          *   data connection if TA cable is connected to target.
848                          * - Support charging and data connection through micro-
849                          *   usb port if USB cable is connected between target
850                          *   and host device
851                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
852                          */
853                         ret = max77693_muic_set_path(info, info->path_usb,
854                                                     attached);
855                         if (ret < 0)
856                                 return ret;
857 
858                         extcon_set_cable_state_(info->edev, EXTCON_DOCK,
859                                                 attached);
860                         extcon_set_cable_state_(info->edev, EXTCON_MHL,
861                                                 attached);
862                         break;
863                 }
864 
865                 /* Check MAX77693_CABLE_GROUP_CHG type */
866                 switch (chg_type) {
867                 case MAX77693_CHARGER_TYPE_NONE:
868                         /*
869                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
870                          * cable is attached, muic device happen below two irq.
871                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
872                          *    MHL/Dock-Audio.
873                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
874                          *    USB/TA cable connected to MHL or Dock-Audio.
875                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
876                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
877                          *
878                          * If user attach MHL (with USB/TA cable and immediately
879                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
880                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
881                          * connected state to target. But USB/TA cable isn't
882                          * connected to target. The user be face with unusual
883                          * action. So, driver should check this situation in
884                          * spite of, that previous charger type is N/A.
885                          */
886                         break;
887                 case MAX77693_CHARGER_TYPE_USB:
888                         /* Only USB cable, PATH:AP_USB */
889                         ret = max77693_muic_set_path(info, info->path_usb,
890                                                     attached);
891                         if (ret < 0)
892                                 return ret;
893 
894                         extcon_set_cable_state_(info->edev, EXTCON_USB,
895                                                 attached);
896                         break;
897                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
898                         /* Only TA cable */
899                         extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
900                         break;
901                 }
902                 break;
903         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
904                 extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM,
905                                         attached);
906                 break;
907         case MAX77693_CHARGER_TYPE_APPLE_500MA:
908                 extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER,
909                                         attached);
910                 break;
911         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
912                 extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER,
913                                         attached);
914                 break;
915         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
916                 break;
917         default:
918                 dev_err(info->dev,
919                         "failed to detect %s accessory (chg_type:0x%x)\n",
920                         attached ? "attached" : "detached", chg_type);
921                 return -EINVAL;
922         }
923 
924         return 0;
925 }
926 
927 static void max77693_muic_irq_work(struct work_struct *work)
928 {
929         struct max77693_muic_info *info = container_of(work,
930                         struct max77693_muic_info, irq_work);
931         int irq_type = -1;
932         int i, ret = 0;
933 
934         if (!info->edev)
935                 return;
936 
937         mutex_lock(&info->mutex);
938 
939         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
940                 if (info->irq == muic_irqs[i].virq)
941                         irq_type = muic_irqs[i].irq;
942 
943         ret = regmap_bulk_read(info->max77693->regmap_muic,
944                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
945         if (ret) {
946                 dev_err(info->dev, "failed to read MUIC register\n");
947                 mutex_unlock(&info->mutex);
948                 return;
949         }
950 
951         switch (irq_type) {
952         case MAX77693_MUIC_IRQ_INT1_ADC:
953         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
954         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
955         case MAX77693_MUIC_IRQ_INT1_ADC1K:
956                 /* Handle all of accessory except for
957                    type of charger accessory */
958                 ret = max77693_muic_adc_handler(info);
959                 break;
960         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
961         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
962         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
963         case MAX77693_MUIC_IRQ_INT2_DXOVP:
964         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
965         case MAX77693_MUIC_IRQ_INT2_VIDRM:
966                 /* Handle charger accessory */
967                 ret = max77693_muic_chg_handler(info);
968                 break;
969         case MAX77693_MUIC_IRQ_INT3_EOC:
970         case MAX77693_MUIC_IRQ_INT3_CGMBC:
971         case MAX77693_MUIC_IRQ_INT3_OVP:
972         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
973         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
974         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
975                 break;
976         default:
977                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
978                                 irq_type);
979                 mutex_unlock(&info->mutex);
980                 return;
981         }
982 
983         if (ret < 0)
984                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
985 
986         mutex_unlock(&info->mutex);
987 }
988 
989 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
990 {
991         struct max77693_muic_info *info = data;
992 
993         info->irq = irq;
994         schedule_work(&info->irq_work);
995 
996         return IRQ_HANDLED;
997 }
998 
999 static const struct regmap_config max77693_muic_regmap_config = {
1000         .reg_bits = 8,
1001         .val_bits = 8,
1002 };
1003 
1004 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1005 {
1006         int ret = 0;
1007         int adc;
1008         int chg_type;
1009         bool attached;
1010 
1011         mutex_lock(&info->mutex);
1012 
1013         /* Read STATUSx register to detect accessory */
1014         ret = regmap_bulk_read(info->max77693->regmap_muic,
1015                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1016         if (ret) {
1017                 dev_err(info->dev, "failed to read MUIC register\n");
1018                 mutex_unlock(&info->mutex);
1019                 return ret;
1020         }
1021 
1022         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1023                                         &attached);
1024         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1025                 ret = max77693_muic_adc_handler(info);
1026                 if (ret < 0) {
1027                         dev_err(info->dev, "Cannot detect accessory\n");
1028                         mutex_unlock(&info->mutex);
1029                         return ret;
1030                 }
1031         }
1032 
1033         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1034                                         &attached);
1035         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1036                 ret = max77693_muic_chg_handler(info);
1037                 if (ret < 0) {
1038                         dev_err(info->dev, "Cannot detect charger accessory\n");
1039                         mutex_unlock(&info->mutex);
1040                         return ret;
1041                 }
1042         }
1043 
1044         mutex_unlock(&info->mutex);
1045 
1046         return 0;
1047 }
1048 
1049 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1050 {
1051         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1052                                 struct max77693_muic_info, wq_detcable);
1053 
1054         max77693_muic_detect_accessory(info);
1055 }
1056 
1057 static int max77693_muic_probe(struct platform_device *pdev)
1058 {
1059         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1060         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1061         struct max77693_muic_info *info;
1062         struct max77693_reg_data *init_data;
1063         int num_init_data;
1064         int delay_jiffies;
1065         int ret;
1066         int i;
1067         unsigned int id;
1068 
1069         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1070                                    GFP_KERNEL);
1071         if (!info)
1072                 return -ENOMEM;
1073 
1074         info->dev = &pdev->dev;
1075         info->max77693 = max77693;
1076         if (info->max77693->regmap_muic) {
1077                 dev_dbg(&pdev->dev, "allocate register map\n");
1078         } else {
1079                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1080                                                 info->max77693->muic,
1081                                                 &max77693_muic_regmap_config);
1082                 if (IS_ERR(info->max77693->regmap_muic)) {
1083                         ret = PTR_ERR(info->max77693->regmap_muic);
1084                         dev_err(max77693->dev,
1085                                 "failed to allocate register map: %d\n", ret);
1086                         return ret;
1087                 }
1088         }
1089 
1090         /* Register input device for button of dock device */
1091         info->dock = devm_input_allocate_device(&pdev->dev);
1092         if (!info->dock) {
1093                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1094                 return -ENOMEM;
1095         }
1096         info->dock->name = "max77693-muic/dock";
1097         info->dock->phys = "max77693-muic/extcon";
1098         info->dock->dev.parent = &pdev->dev;
1099 
1100         __set_bit(EV_REP, info->dock->evbit);
1101 
1102         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1103         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1104         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1105         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1106         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1107 
1108         ret = input_register_device(info->dock);
1109         if (ret < 0) {
1110                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1111                                 ret);
1112                 return ret;
1113         }
1114 
1115         platform_set_drvdata(pdev, info);
1116         mutex_init(&info->mutex);
1117 
1118         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1119 
1120         /* Support irq domain for MAX77693 MUIC device */
1121         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1122                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1123                 unsigned int virq = 0;
1124 
1125                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1126                                         muic_irq->irq);
1127                 if (!virq)
1128                         return -EINVAL;
1129                 muic_irq->virq = virq;
1130 
1131                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1132                                 max77693_muic_irq_handler,
1133                                 IRQF_NO_SUSPEND,
1134                                 muic_irq->name, info);
1135                 if (ret) {
1136                         dev_err(&pdev->dev,
1137                                 "failed: irq request (IRQ: %d, error :%d)\n",
1138                                 muic_irq->irq, ret);
1139                         return ret;
1140                 }
1141         }
1142 
1143         /* Initialize extcon device */
1144         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1145                                               max77693_extcon_cable);
1146         if (IS_ERR(info->edev)) {
1147                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1148                 return -ENOMEM;
1149         }
1150 
1151         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1152         if (ret) {
1153                 dev_err(&pdev->dev, "failed to register extcon device\n");
1154                 return ret;
1155         }
1156 
1157         /* Initialize MUIC register by using platform data or default data */
1158         if (pdata && pdata->muic_data) {
1159                 init_data = pdata->muic_data->init_data;
1160                 num_init_data = pdata->muic_data->num_init_data;
1161         } else {
1162                 init_data = default_init_data;
1163                 num_init_data = ARRAY_SIZE(default_init_data);
1164         }
1165 
1166         for (i = 0; i < num_init_data; i++) {
1167                 enum max77693_irq_source irq_src
1168                                 = MAX77693_IRQ_GROUP_NR;
1169 
1170                 regmap_write(info->max77693->regmap_muic,
1171                                 init_data[i].addr,
1172                                 init_data[i].data);
1173 
1174                 switch (init_data[i].addr) {
1175                 case MAX77693_MUIC_REG_INTMASK1:
1176                         irq_src = MUIC_INT1;
1177                         break;
1178                 case MAX77693_MUIC_REG_INTMASK2:
1179                         irq_src = MUIC_INT2;
1180                         break;
1181                 case MAX77693_MUIC_REG_INTMASK3:
1182                         irq_src = MUIC_INT3;
1183                         break;
1184                 }
1185 
1186                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1187                         info->max77693->irq_masks_cur[irq_src]
1188                                 = init_data[i].data;
1189         }
1190 
1191         if (pdata && pdata->muic_data) {
1192                 struct max77693_muic_platform_data *muic_pdata
1193                                                    = pdata->muic_data;
1194 
1195                 /*
1196                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1197                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1198                  */
1199                 if (muic_pdata->path_uart)
1200                         info->path_uart = muic_pdata->path_uart;
1201                 else
1202                         info->path_uart = CONTROL1_SW_UART;
1203 
1204                 if (muic_pdata->path_usb)
1205                         info->path_usb = muic_pdata->path_usb;
1206                 else
1207                         info->path_usb = CONTROL1_SW_USB;
1208 
1209                 /*
1210                  * Default delay time for detecting cable state
1211                  * after certain time.
1212                  */
1213                 if (muic_pdata->detcable_delay_ms)
1214                         delay_jiffies =
1215                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1216                 else
1217                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1218         } else {
1219                 info->path_usb = CONTROL1_SW_USB;
1220                 info->path_uart = CONTROL1_SW_UART;
1221                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1222         }
1223 
1224         /* Set initial path for UART */
1225          max77693_muic_set_path(info, info->path_uart, true);
1226 
1227         /* Check revision number of MUIC device*/
1228         ret = regmap_read(info->max77693->regmap_muic,
1229                         MAX77693_MUIC_REG_ID, &id);
1230         if (ret < 0) {
1231                 dev_err(&pdev->dev, "failed to read revision number\n");
1232                 return ret;
1233         }
1234         dev_info(info->dev, "device ID : 0x%x\n", id);
1235 
1236         /* Set ADC debounce time */
1237         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1238 
1239         /*
1240          * Detect accessory after completing the initialization of platform
1241          *
1242          * - Use delayed workqueue to detect cable state and then
1243          * notify cable state to notifiee/platform through uevent.
1244          * After completing the booting of platform, the extcon provider
1245          * driver should notify cable state to upper layer.
1246          */
1247         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1248         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1249                         delay_jiffies);
1250 
1251         return ret;
1252 }
1253 
1254 static int max77693_muic_remove(struct platform_device *pdev)
1255 {
1256         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1257 
1258         cancel_work_sync(&info->irq_work);
1259         input_unregister_device(info->dock);
1260 
1261         return 0;
1262 }
1263 
1264 static struct platform_driver max77693_muic_driver = {
1265         .driver         = {
1266                 .name   = DEV_NAME,
1267         },
1268         .probe          = max77693_muic_probe,
1269         .remove         = max77693_muic_remove,
1270 };
1271 
1272 module_platform_driver(max77693_muic_driver);
1273 
1274 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1275 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1276 MODULE_LICENSE("GPL");
1277 MODULE_ALIAS("platform:extcon-max77693");
1278 

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