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 enum {
 204         EXTCON_CABLE_USB = 0,
 205         EXTCON_CABLE_USB_HOST,
 206         EXTCON_CABLE_TA,
 207         EXTCON_CABLE_FAST_CHARGER,
 208         EXTCON_CABLE_SLOW_CHARGER,
 209         EXTCON_CABLE_CHARGE_DOWNSTREAM,
 210         EXTCON_CABLE_MHL,
 211         EXTCON_CABLE_MHL_TA,
 212         EXTCON_CABLE_JIG,
 213         EXTCON_CABLE_DOCK_SMART,
 214         EXTCON_CABLE_DOCK_DESK,
 215         EXTCON_CABLE_DOCK_AUDIO,
 216
 217         _EXTCON_CABLE_NUM,
 218 };
 219
 220 static const char *max77693_extcon_cable[] = {
 221         [EXTCON_CABLE_USB]                      = "USB",
 222         [EXTCON_CABLE_USB_HOST]                 = "USB-Host",
 223         [EXTCON_CABLE_TA]                       = "TA",
 224         [EXTCON_CABLE_FAST_CHARGER]             = "Fast-charger",
 225         [EXTCON_CABLE_SLOW_CHARGER]             = "Slow-charger",
 226         [EXTCON_CABLE_CHARGE_DOWNSTREAM]        = "Charge-downstream",
 227         [EXTCON_CABLE_MHL]                      = "MHL",
 228         [EXTCON_CABLE_MHL_TA]                   = "MHL-TA",
 229         [EXTCON_CABLE_JIG]                      = "JIG",
 230         [EXTCON_CABLE_DOCK_SMART]               = "Dock-Smart",
 231         [EXTCON_CABLE_DOCK_DESK]                = "Dock-Desk",
 232         [EXTCON_CABLE_DOCK_AUDIO]               = "Dock-Audio",
 233
 234         NULL,
 235 };
 236
 237 /*
 238  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 239  * @info: the instance including private data of max77693 MUIC
 240  * @time: the debounce time of ADC
 241  */
 242 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 243                 enum max77693_muic_adc_debounce_time time)
 244 {
 245         int ret;
 246
 247         switch (time) {
 248         case ADC_DEBOUNCE_TIME_5MS:
 249         case ADC_DEBOUNCE_TIME_10MS:
 250         case ADC_DEBOUNCE_TIME_25MS:
 251         case ADC_DEBOUNCE_TIME_38_62MS:
 252                 /*
 253                  * Don't touch BTLDset, JIGset when you want to change adc
 254                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 255                  * muic device will be reset and loose current state.
 256                  */
 257                 ret = regmap_write(info->max77693->regmap_muic,
 258                                   MAX77693_MUIC_REG_CTRL3,
 259                                   time << CONTROL3_ADCDBSET_SHIFT);
 260                 if (ret) {
 261                         dev_err(info->dev, "failed to set ADC debounce time\n");
 262                         return ret;
 263                 }
 264                 break;
 265         default:
 266                 dev_err(info->dev, "invalid ADC debounce time\n");
 267                 return -EINVAL;
 268         }
 269
 270         return 0;
 271 };
 272
 273 /*
 274  * max77693_muic_set_path - Set hardware line according to attached cable
 275  * @info: the instance including private data of max77693 MUIC
 276  * @value: the path according to attached cable
 277  * @attached: the state of cable (true:attached, false:detached)
 278  *
 279  * The max77693 MUIC device share outside H/W line among a varity of cables
 280  * so, this function set internal path of H/W line according to the type of
 281  * attached cable.
 282  */
 283 static int max77693_muic_set_path(struct max77693_muic_info *info,
 284                 u8 val, bool attached)
 285 {
 286         int ret = 0;
 287         unsigned int ctrl1, ctrl2 = 0;
 288
 289         if (attached)
 290                 ctrl1 = val;
 291         else
 292                 ctrl1 = CONTROL1_SW_OPEN;
 293
 294         ret = regmap_update_bits(info->max77693->regmap_muic,
 295                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 296         if (ret < 0) {
 297                 dev_err(info->dev, "failed to update MUIC register\n");
 298                 return ret;
 299         }
 300
 301         if (attached)
 302                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 303         else
 304                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 305
 306         ret = regmap_update_bits(info->max77693->regmap_muic,
 307                         MAX77693_MUIC_REG_CTRL2,
 308                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
 309         if (ret < 0) {
 310                 dev_err(info->dev, "failed to update MUIC register\n");
 311                 return ret;
 312         }
 313
 314         dev_info(info->dev,
 315                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 316                 ctrl1, ctrl2, attached ? "attached" : "detached");
 317
 318         return 0;
 319 }
 320
 321 /*
 322  * max77693_muic_get_cable_type - Return cable type and check cable state
 323  * @info: the instance including private data of max77693 MUIC
 324  * @group: the path according to attached cable
 325  * @attached: store cable state and return
 326  *
 327  * This function check the cable state either attached or detached,
 328  * and then divide precise type of cable according to cable group.
 329  *      - MAX77693_CABLE_GROUP_ADC
 330  *      - MAX77693_CABLE_GROUP_ADC_GND
 331  *      - MAX77693_CABLE_GROUP_CHG
 332  *      - MAX77693_CABLE_GROUP_VBVOLT
 333  */
 334 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 335                 enum max77693_muic_cable_group group, bool *attached)
 336 {
 337         int cable_type = 0;
 338         int adc;
 339         int adc1k;
 340         int adclow;
 341         int vbvolt;
 342         int chg_type;
 343
 344         switch (group) {
 345         case MAX77693_CABLE_GROUP_ADC:
 346                 /*
 347                  * Read ADC value to check cable type and decide cable state
 348                  * according to cable type
 349                  */
 350                 adc = info->status[0] & STATUS1_ADC_MASK;
 351                 adc >>= STATUS1_ADC_SHIFT;
 352
 353                 /*
 354                  * Check current cable state/cable type and store cable type
 355                  * (info->prev_cable_type) for handling cable when cable is
 356                  * detached.
 357                  */
 358                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 359                         *attached = false;
 360
 361                         cable_type = info->prev_cable_type;
 362                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 363                 } else {
 364                         *attached = true;
 365
 366                         cable_type = info->prev_cable_type = adc;
 367                 }
 368                 break;
 369         case MAX77693_CABLE_GROUP_ADC_GND:
 370                 /*
 371                  * Read ADC value to check cable type and decide cable state
 372                  * according to cable type
 373                  */
 374                 adc = info->status[0] & STATUS1_ADC_MASK;
 375                 adc >>= STATUS1_ADC_SHIFT;
 376
 377                 /*
 378                  * Check current cable state/cable type and store cable type
 379                  * (info->prev_cable_type/_gnd) for handling cable when cable
 380                  * is detached.
 381                  */
 382                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 383                         *attached = false;
 384
 385                         cable_type = info->prev_cable_type_gnd;
 386                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 387                 } else {
 388                         *attached = true;
 389
 390                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 391                         adclow >>= STATUS1_ADCLOW_SHIFT;
 392                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 393                         adc1k >>= STATUS1_ADC1K_SHIFT;
 394
 395                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 396                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
 397
 398                         /**
 399                          * [0x1|VBVolt|ADCLow|ADC1K]
 400                          * [0x1|     0|     0|    0] USB_HOST
 401                          * [0x1|     1|     0|    0] USB_HSOT_VB
 402                          * [0x1|     0|     1|    0] Audio Video cable with load
 403                          * [0x1|     0|     1|    1] MHL without charging cable
 404                          * [0x1|     1|     1|    1] MHL with charging cable
 405                          */
 406                         cable_type = ((0x1 << 8)
 407                                         | (vbvolt << 2)
 408                                         | (adclow << 1)
 409                                         | adc1k);
 410
 411                         info->prev_cable_type = adc;
 412                         info->prev_cable_type_gnd = cable_type;
 413                 }
 414
 415                 break;
 416         case MAX77693_CABLE_GROUP_CHG:
 417                 /*
 418                  * Read charger type to check cable type and decide cable state
 419                  * according to type of charger cable.
 420                  */
 421                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 422                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 423
 424                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 425                         *attached = false;
 426
 427                         cable_type = info->prev_chg_type;
 428                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 429                 } else {
 430                         *attached = true;
 431
 432                         /*
 433                          * Check current cable state/cable type and store cable
 434                          * type(info->prev_chg_type) for handling cable when
 435                          * charger cable is detached.
 436                          */
 437                         cable_type = info->prev_chg_type = chg_type;
 438                 }
 439
 440                 break;
 441         case MAX77693_CABLE_GROUP_VBVOLT:
 442                 /*
 443                  * Read ADC value to check cable type and decide cable state
 444                  * according to cable type
 445                  */
 446                 adc = info->status[0] & STATUS1_ADC_MASK;
 447                 adc >>= STATUS1_ADC_SHIFT;
 448                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 449                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 450
 451                 if (adc == MAX77693_MUIC_ADC_OPEN
 452                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 453                         *attached = false;
 454                 else
 455                         *attached = true;
 456
 457                 /*
 458                  * Read vbvolt field, if vbvolt is 1,
 459                  * this cable is used for charging.
 460                  */
 461                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 462                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
 463
 464                 cable_type = vbvolt;
 465                 break;
 466         default:
 467                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 468                 cable_type = -EINVAL;
 469                 break;
 470         }
 471
 472         return cable_type;
 473 }
 474
 475 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 476                 int cable_type, bool attached)
 477 {
 478         int ret = 0;
 479         int vbvolt;
 480         bool cable_attached;
 481         char dock_name[CABLE_NAME_MAX];
 482
 483         dev_info(info->dev,
 484                 "external connector is %s (adc:0x%02x)\n",
 485                 attached ? "attached" : "detached", cable_type);
 486
 487         switch (cable_type) {
 488         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 489                 /*
 490                  * Check power cable whether attached or detached state.
 491                  * The Dock-Smart device need surely external power supply.
 492                  * If power cable(USB/TA) isn't connected to Dock device,
 493                  * user can't use Dock-Smart for desktop mode.
 494                  */
 495                 vbvolt = max77693_muic_get_cable_type(info,
 496                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 497                 if (attached && !vbvolt) {
 498                         dev_warn(info->dev,
 499                                 "Cannot detect external power supply\n");
 500                         return 0;
 501                 }
 502
 503                 /*
 504                  * Notify Dock-Smart/MHL state.
 505                  * - Dock-Smart device include three type of cable which
 506                  * are HDMI, USB for mouse/keyboard and micro-usb port
 507                  * for USB/TA cable. Dock-Smart device need always exteranl
 508                  * power supply(USB/TA cable through micro-usb cable). Dock-
 509                  * Smart device support screen output of target to separate
 510                  * monitor and mouse/keyboard for desktop mode.
 511                  *
 512                  * Features of 'USB/TA cable with Dock-Smart device'
 513                  * - Support MHL
 514                  * - Support external output feature of audio
 515                  * - Support charging through micro-usb port without data
 516                  *           connection if TA cable is connected to target.
 517                  * - Support charging and data connection through micro-usb port
 518                  *           if USB cable is connected between target and host
 519                  *           device.
 520                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 521                  */
 522                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 523                 if (ret < 0)
 524                         return ret;
 525
 526                 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
 527                 extcon_set_cable_state(info->edev, "MHL", attached);
 528                 goto out;
 529         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 530                 strcpy(dock_name, "Dock-Desk");
 531                 break;
 532         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 533                 strcpy(dock_name, "Dock-Audio");
 534                 if (!attached)
 535                         extcon_set_cable_state(info->edev, "USB", false);
 536                 break;
 537         default:
 538                 dev_err(info->dev, "failed to detect %s dock device\n",
 539                         attached ? "attached" : "detached");
 540                 return -EINVAL;
 541         }
 542
 543         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 544         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 545         if (ret < 0)
 546                 return ret;
 547         extcon_set_cable_state(info->edev, dock_name, attached);
 548
 549 out:
 550         return 0;
 551 }
 552
 553 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 554                 int button_type, bool attached)
 555 {
 556         struct input_dev *dock = info->dock;
 557         unsigned int code;
 558
 559         switch (button_type) {
 560         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 561                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 562                 /* DOCK_KEY_PREV */
 563                 code = KEY_PREVIOUSSONG;
 564                 break;
 565         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 566                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 567                 /* DOCK_KEY_NEXT */
 568                 code = KEY_NEXTSONG;
 569                 break;
 570         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 571                 /* DOCK_VOL_DOWN */
 572                 code = KEY_VOLUMEDOWN;
 573                 break;
 574         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 575                 /* DOCK_VOL_UP */
 576                 code = KEY_VOLUMEUP;
 577                 break;
 578         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 579                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 580                 /* DOCK_KEY_PLAY_PAUSE */
 581                 code = KEY_PLAYPAUSE;
 582                 break;
 583         default:
 584                 dev_err(info->dev,
 585                         "failed to detect %s key (adc:0x%x)\n",
 586                         attached ? "pressed" : "released", button_type);
 587                 return -EINVAL;
 588         }
 589
 590         input_event(dock, EV_KEY, code, attached);
 591         input_sync(dock);
 592
 593         return 0;
 594 }
 595
 596 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 597 {
 598         int cable_type_gnd;
 599         int ret = 0;
 600         bool attached;
 601
 602         cable_type_gnd = max77693_muic_get_cable_type(info,
 603                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 604
 605         switch (cable_type_gnd) {
 606         case MAX77693_MUIC_GND_USB_HOST:
 607         case MAX77693_MUIC_GND_USB_HOST_VB:
 608                 /* USB_HOST, PATH: AP_USB */
 609                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 610                 if (ret < 0)
 611                         return ret;
 612                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 613                 break;
 614         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 615                 /* Audio Video Cable with load, PATH:AUDIO */
 616                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 617                 if (ret < 0)
 618                         return ret;
 619                 extcon_set_cable_state(info->edev,
 620                                 "Audio-video-load", attached);
 621                 break;
 622         case MAX77693_MUIC_GND_MHL:
 623         case MAX77693_MUIC_GND_MHL_VB:
 624                 /* MHL or MHL with USB/TA cable */
 625                 extcon_set_cable_state(info->edev, "MHL", attached);
 626                 break;
 627         default:
 628                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 629                         attached ? "attached" : "detached");
 630                 return -EINVAL;
 631         }
 632
 633         return 0;
 634 }
 635
 636 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 637                 int cable_type, bool attached)
 638 {
 639         int ret = 0;
 640         u8 path = CONTROL1_SW_OPEN;
 641
 642         dev_info(info->dev,
 643                 "external connector is %s (adc:0x%02x)\n",
 644                 attached ? "attached" : "detached", cable_type);
 645
 646         switch (cable_type) {
 647         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 648         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 649                 /* PATH:AP_USB */
 650                 path = CONTROL1_SW_USB;
 651                 break;
 652         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 653         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 654                 /* PATH:AP_UART */
 655                 path = CONTROL1_SW_UART;
 656                 break;
 657         default:
 658                 dev_err(info->dev, "failed to detect %s jig cable\n",
 659                         attached ? "attached" : "detached");
 660                 return -EINVAL;
 661         }
 662
 663         ret = max77693_muic_set_path(info, path, attached);
 664         if (ret < 0)
 665                 return ret;
 666
 667         extcon_set_cable_state(info->edev, "JIG", attached);
 668
 669         return 0;
 670 }
 671
 672 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 673 {
 674         int cable_type;
 675         int button_type;
 676         bool attached;
 677         int ret = 0;
 678
 679         /* Check accessory state which is either detached or attached */
 680         cable_type = max77693_muic_get_cable_type(info,
 681                                 MAX77693_CABLE_GROUP_ADC, &attached);
 682
 683         dev_info(info->dev,
 684                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 685                 attached ? "attached" : "detached", cable_type,
 686                 info->prev_cable_type);
 687
 688         switch (cable_type) {
 689         case MAX77693_MUIC_ADC_GROUND:
 690                 /* USB_HOST/MHL/Audio */
 691                 max77693_muic_adc_ground_handler(info);
 692                 break;
 693         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 694         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 695         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 696         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 697                 /* JIG */
 698                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 699                 if (ret < 0)
 700                         return ret;
 701                 break;
 702         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 703         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 704         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 705                 /*
 706                  * DOCK device
 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                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 715                 if (ret < 0)
 716                         return ret;
 717                 break;
 718         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 719         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 720         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 721         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 722         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 723                 /*
 724                  * Button of DOCK device
 725                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 726                  *
 727                  * The MAX77693 MUIC device can detect total 34 cable type
 728                  * except of charger cable and MUIC device didn't define
 729                  * specfic role of cable in the range of from 0x01 to 0x12
 730                  * of ADC value. So, can use/define cable with no role according
 731                  * to schema of hardware board.
 732                  */
 733                 if (attached)
 734                         button_type = info->prev_button_type = cable_type;
 735                 else
 736                         button_type = info->prev_button_type;
 737
 738                 ret = max77693_muic_dock_button_handler(info, button_type,
 739                                                         attached);
 740                 if (ret < 0)
 741                         return ret;
 742                 break;
 743         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 744         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 745         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 746         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 747         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 748         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 749         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 750         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 751         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 752         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 753         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 754         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 755         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 756         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 757         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 758         case MAX77693_MUIC_ADC_UART_CABLE:
 759         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 760         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 761                 /*
 762                  * This accessory isn't used in general case if it is specially
 763                  * needed to detect additional accessory, should implement
 764                  * proper operation when this accessory is attached/detached.
 765                  */
 766                 dev_info(info->dev,
 767                         "accessory is %s but it isn't used (adc:0x%x)\n",
 768                         attached ? "attached" : "detached", cable_type);
 769                 return -EAGAIN;
 770         default:
 771                 dev_err(info->dev,
 772                         "failed to detect %s accessory (adc:0x%x)\n",
 773                         attached ? "attached" : "detached", cable_type);
 774                 return -EINVAL;
 775         }
 776
 777         return 0;
 778 }
 779
 780 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 781 {
 782         int chg_type;
 783         int cable_type_gnd;
 784         int cable_type;
 785         bool attached;
 786         bool cable_attached;
 787         int ret = 0;
 788
 789         chg_type = max77693_muic_get_cable_type(info,
 790                                 MAX77693_CABLE_GROUP_CHG, &attached);
 791
 792         dev_info(info->dev,
 793                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 794                         attached ? "attached" : "detached",
 795                         chg_type, info->prev_chg_type);
 796
 797         switch (chg_type) {
 798         case MAX77693_CHARGER_TYPE_USB:
 799         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 800         case MAX77693_CHARGER_TYPE_NONE:
 801                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 802                 cable_type_gnd = max77693_muic_get_cable_type(info,
 803                                         MAX77693_CABLE_GROUP_ADC_GND,
 804                                         &cable_attached);
 805                 switch (cable_type_gnd) {
 806                 case MAX77693_MUIC_GND_MHL:
 807                 case MAX77693_MUIC_GND_MHL_VB:
 808                         /*
 809                          * MHL cable with MHL-TA(USB/TA) cable
 810                          * - MHL cable include two port(HDMI line and separate
 811                          * micro-usb port. When the target connect MHL cable,
 812                          * extcon driver check whether MHL-TA(USB/TA) cable is
 813                          * connected. If MHL-TA cable is connected, extcon
 814                          * driver notify state to notifiee for charging battery.
 815                          *
 816                          * Features of 'MHL-TA(USB/TA) with MHL cable'
 817                          * - Support MHL
 818                          * - Support charging through micro-usb port without
 819                          *   data connection
 820                          */
 821                         extcon_set_cable_state(info->edev, "MHL-TA", attached);
 822                         if (!cable_attached)
 823                                 extcon_set_cable_state(info->edev,
 824                                                       "MHL", cable_attached);
 825                         break;
 826                 }
 827
 828                 /* Check MAX77693_CABLE_GROUP_ADC type */
 829                 cable_type = max77693_muic_get_cable_type(info,
 830                                         MAX77693_CABLE_GROUP_ADC,
 831                                         &cable_attached);
 832                 switch (cable_type) {
 833                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 834                         /*
 835                          * Dock-Audio device with USB/TA cable
 836                          * - Dock device include two port(Dock-Audio and micro-
 837                          * usb port). When the target connect Dock-Audio device,
 838                          * extcon driver check whether USB/TA cable is connected
 839                          * or not. If USB/TA cable is connected, extcon driver
 840                          * notify state to notifiee for charging battery.
 841                          *
 842                          * Features of 'USB/TA cable with Dock-Audio device'
 843                          * - Support external output feature of audio.
 844                          * - Support charging through micro-usb port without
 845                          *   data connection.
 846                          */
 847                         extcon_set_cable_state(info->edev, "USB", attached);
 848
 849                         if (!cable_attached)
 850                                 extcon_set_cable_state(info->edev, "Dock-Audio",
 851                                                       cable_attached);
 852                         break;
 853                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 854                         /*
 855                          * Dock-Smart device with USB/TA cable
 856                          * - Dock-Desk device include three type of cable which
 857                          * are HDMI, USB for mouse/keyboard and micro-usb port
 858                          * for USB/TA cable. Dock-Smart device need always
 859                          * exteranl power supply(USB/TA cable through micro-usb
 860                          * cable). Dock-Smart device support screen output of
 861                          * target to separate monitor and mouse/keyboard for
 862                          * desktop mode.
 863                          *
 864                          * Features of 'USB/TA cable with Dock-Smart device'
 865                          * - Support MHL
 866                          * - Support external output feature of audio
 867                          * - Support charging through micro-usb port without
 868                          *   data connection if TA cable is connected to target.
 869                          * - Support charging and data connection through micro-
 870                          *   usb port if USB cable is connected between target
 871                          *   and host device
 872                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 873                          */
 874                         ret = max77693_muic_set_path(info, info->path_usb,
 875                                                     attached);
 876                         if (ret < 0)
 877                                 return ret;
 878
 879                         extcon_set_cable_state(info->edev, "Dock-Smart",
 880                                               attached);
 881                         extcon_set_cable_state(info->edev, "MHL", attached);
 882
 883                         break;
 884                 }
 885
 886                 /* Check MAX77693_CABLE_GROUP_CHG type */
 887                 switch (chg_type) {
 888                 case MAX77693_CHARGER_TYPE_NONE:
 889                         /*
 890                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 891                          * cable is attached, muic device happen below two irq.
 892                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 893                          *    MHL/Dock-Audio.
 894                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 895                          *    USB/TA cable connected to MHL or Dock-Audio.
 896                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 897                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 898                          *
 899                          * If user attach MHL (with USB/TA cable and immediately
 900                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 901                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 902                          * connected state to target. But USB/TA cable isn't
 903                          * connected to target. The user be face with unusual
 904                          * action. So, driver should check this situation in
 905                          * spite of, that previous charger type is N/A.
 906                          */
 907                         break;
 908                 case MAX77693_CHARGER_TYPE_USB:
 909                         /* Only USB cable, PATH:AP_USB */
 910                         ret = max77693_muic_set_path(info, info->path_usb,
 911                                                     attached);
 912                         if (ret < 0)
 913                                 return ret;
 914
 915                         extcon_set_cable_state(info->edev, "USB", attached);
 916                         break;
 917                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 918                         /* Only TA cable */
 919                         extcon_set_cable_state(info->edev, "TA", attached);
 920                         break;
 921                 }
 922                 break;
 923         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 924                 extcon_set_cable_state(info->edev,
 925                                 "Charge-downstream", attached);
 926                 break;
 927         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 928                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 929                 break;
 930         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 931                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 932                 break;
 933         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 934                 break;
 935         default:
 936                 dev_err(info->dev,
 937                         "failed to detect %s accessory (chg_type:0x%x)\n",
 938                         attached ? "attached" : "detached", chg_type);
 939                 return -EINVAL;
 940         }
 941
 942         return 0;
 943 }
 944
 945 static void max77693_muic_irq_work(struct work_struct *work)
 946 {
 947         struct max77693_muic_info *info = container_of(work,
 948                         struct max77693_muic_info, irq_work);
 949         int irq_type = -1;
 950         int i, ret = 0;
 951
 952         if (!info->edev)
 953                 return;
 954
 955         mutex_lock(&info->mutex);
 956
 957         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 958                 if (info->irq == muic_irqs[i].virq)
 959                         irq_type = muic_irqs[i].irq;
 960
 961         ret = regmap_bulk_read(info->max77693->regmap_muic,
 962                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 963         if (ret) {
 964                 dev_err(info->dev, "failed to read MUIC register\n");
 965                 mutex_unlock(&info->mutex);
 966                 return;
 967         }
 968
 969         switch (irq_type) {
 970         case MAX77693_MUIC_IRQ_INT1_ADC:
 971         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 972         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 973         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 974                 /* Handle all of accessory except for
 975                    type of charger accessory */
 976                 ret = max77693_muic_adc_handler(info);
 977                 break;
 978         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 979         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 980         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 981         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 982         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 983         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 984                 /* Handle charger accessory */
 985                 ret = max77693_muic_chg_handler(info);
 986                 break;
 987         case MAX77693_MUIC_IRQ_INT3_EOC:
 988         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 989         case MAX77693_MUIC_IRQ_INT3_OVP:
 990         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 991         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 992         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 993                 break;
 994         default:
 995                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 996                                 irq_type);
 997                 mutex_unlock(&info->mutex);
 998                 return;
 999         }
1000
1001         if (ret < 0)
1002                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1003
1004         mutex_unlock(&info->mutex);
1005 }
1006
1007 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1008 {
1009         struct max77693_muic_info *info = data;
1010
1011         info->irq = irq;
1012         schedule_work(&info->irq_work);
1013
1014         return IRQ_HANDLED;
1015 }
1016
1017 static const struct regmap_config max77693_muic_regmap_config = {
1018         .reg_bits = 8,
1019         .val_bits = 8,
1020 };
1021
1022 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1023 {
1024         int ret = 0;
1025         int adc;
1026         int chg_type;
1027         bool attached;
1028
1029         mutex_lock(&info->mutex);
1030
1031         /* Read STATUSx register to detect accessory */
1032         ret = regmap_bulk_read(info->max77693->regmap_muic,
1033                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1034         if (ret) {
1035                 dev_err(info->dev, "failed to read MUIC register\n");
1036                 mutex_unlock(&info->mutex);
1037                 return ret;
1038         }
1039
1040         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1041                                         &attached);
1042         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1043                 ret = max77693_muic_adc_handler(info);
1044                 if (ret < 0) {
1045                         dev_err(info->dev, "Cannot detect accessory\n");
1046                         mutex_unlock(&info->mutex);
1047                         return ret;
1048                 }
1049         }
1050
1051         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1052                                         &attached);
1053         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1054                 ret = max77693_muic_chg_handler(info);
1055                 if (ret < 0) {
1056                         dev_err(info->dev, "Cannot detect charger accessory\n");
1057                         mutex_unlock(&info->mutex);
1058                         return ret;
1059                 }
1060         }
1061
1062         mutex_unlock(&info->mutex);
1063
1064         return 0;
1065 }
1066
1067 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1068 {
1069         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1070                                 struct max77693_muic_info, wq_detcable);
1071
1072         max77693_muic_detect_accessory(info);
1073 }
1074
1075 static int max77693_muic_probe(struct platform_device *pdev)
1076 {
1077         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1078         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1079         struct max77693_muic_info *info;
1080         struct max77693_reg_data *init_data;
1081         int num_init_data;
1082         int delay_jiffies;
1083         int ret;
1084         int i;
1085         unsigned int id;
1086
1087         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1088                                    GFP_KERNEL);
1089         if (!info)
1090                 return -ENOMEM;
1091
1092         info->dev = &pdev->dev;
1093         info->max77693 = max77693;
1094         if (info->max77693->regmap_muic) {
1095                 dev_dbg(&pdev->dev, "allocate register map\n");
1096         } else {
1097                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1098                                                 info->max77693->muic,
1099                                                 &max77693_muic_regmap_config);
1100                 if (IS_ERR(info->max77693->regmap_muic)) {
1101                         ret = PTR_ERR(info->max77693->regmap_muic);
1102                         dev_err(max77693->dev,
1103                                 "failed to allocate register map: %d\n", ret);
1104                         return ret;
1105                 }
1106         }
1107
1108         /* Register input device for button of dock device */
1109         info->dock = devm_input_allocate_device(&pdev->dev);
1110         if (!info->dock) {
1111                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1112                 return -ENOMEM;
1113         }
1114         info->dock->name = "max77693-muic/dock";
1115         info->dock->phys = "max77693-muic/extcon";
1116         info->dock->dev.parent = &pdev->dev;
1117
1118         __set_bit(EV_REP, info->dock->evbit);
1119
1120         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1121         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1122         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1123         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1124         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1125
1126         ret = input_register_device(info->dock);
1127         if (ret < 0) {
1128                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1129                                 ret);
1130                 return ret;
1131         }
1132
1133         platform_set_drvdata(pdev, info);
1134         mutex_init(&info->mutex);
1135
1136         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1137
1138         /* Support irq domain for MAX77693 MUIC device */
1139         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1140                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1141                 unsigned int virq = 0;
1142
1143                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1144                                         muic_irq->irq);
1145                 if (!virq)
1146                         return -EINVAL;
1147                 muic_irq->virq = virq;
1148
1149                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1150                                 max77693_muic_irq_handler,
1151                                 IRQF_NO_SUSPEND,
1152                                 muic_irq->name, info);
1153                 if (ret) {
1154                         dev_err(&pdev->dev,
1155                                 "failed: irq request (IRQ: %d, error :%d)\n",
1156                                 muic_irq->irq, ret);
1157                         return ret;
1158                 }
1159         }
1160
1161         /* Initialize extcon device */
1162         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1163                                               max77693_extcon_cable);
1164         if (IS_ERR(info->edev)) {
1165                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1166                 return -ENOMEM;
1167         }
1168         info->edev->name = DEV_NAME;
1169
1170         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1171         if (ret) {
1172                 dev_err(&pdev->dev, "failed to register extcon device\n");
1173                 return ret;
1174         }
1175
1176         /* Initialize MUIC register by using platform data or default data */
1177         if (pdata && pdata->muic_data) {
1178                 init_data = pdata->muic_data->init_data;
1179                 num_init_data = pdata->muic_data->num_init_data;
1180         } else {
1181                 init_data = default_init_data;
1182                 num_init_data = ARRAY_SIZE(default_init_data);
1183         }
1184
1185         for (i = 0; i < num_init_data; i++) {
1186                 enum max77693_irq_source irq_src
1187                                 = MAX77693_IRQ_GROUP_NR;
1188
1189                 regmap_write(info->max77693->regmap_muic,
1190                                 init_data[i].addr,
1191                                 init_data[i].data);
1192
1193                 switch (init_data[i].addr) {
1194                 case MAX77693_MUIC_REG_INTMASK1:
1195                         irq_src = MUIC_INT1;
1196                         break;
1197                 case MAX77693_MUIC_REG_INTMASK2:
1198                         irq_src = MUIC_INT2;
1199                         break;
1200                 case MAX77693_MUIC_REG_INTMASK3:
1201                         irq_src = MUIC_INT3;
1202                         break;
1203                 }
1204
1205                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1206                         info->max77693->irq_masks_cur[irq_src]
1207                                 = init_data[i].data;
1208         }
1209
1210         if (pdata && pdata->muic_data) {
1211                 struct max77693_muic_platform_data *muic_pdata
1212                                                    = pdata->muic_data;
1213
1214                 /*
1215                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1216                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1217                  */
1218                 if (muic_pdata->path_uart)
1219                         info->path_uart = muic_pdata->path_uart;
1220                 else
1221                         info->path_uart = CONTROL1_SW_UART;
1222
1223                 if (muic_pdata->path_usb)
1224                         info->path_usb = muic_pdata->path_usb;
1225                 else
1226                         info->path_usb = CONTROL1_SW_USB;
1227
1228                 /*
1229                  * Default delay time for detecting cable state
1230                  * after certain time.
1231                  */
1232                 if (muic_pdata->detcable_delay_ms)
1233                         delay_jiffies =
1234                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1235                 else
1236                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1237         } else {
1238                 info->path_usb = CONTROL1_SW_USB;
1239                 info->path_uart = CONTROL1_SW_UART;
1240                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1241         }
1242
1243         /* Set initial path for UART */
1244          max77693_muic_set_path(info, info->path_uart, true);
1245
1246         /* Check revision number of MUIC device*/
1247         ret = regmap_read(info->max77693->regmap_muic,
1248                         MAX77693_MUIC_REG_ID, &id);
1249         if (ret < 0) {
1250                 dev_err(&pdev->dev, "failed to read revision number\n");
1251                 return ret;
1252         }
1253         dev_info(info->dev, "device ID : 0x%x\n", id);
1254
1255         /* Set ADC debounce time */
1256         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1257
1258         /*
1259          * Detect accessory after completing the initialization of platform
1260          *
1261          * - Use delayed workqueue to detect cable state and then
1262          * notify cable state to notifiee/platform through uevent.
1263          * After completing the booting of platform, the extcon provider
1264          * driver should notify cable state to upper layer.
1265          */
1266         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1267         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1268                         delay_jiffies);
1269
1270         return ret;
1271 }
1272
1273 static int max77693_muic_remove(struct platform_device *pdev)
1274 {
1275         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1276
1277         cancel_work_sync(&info->irq_work);
1278         input_unregister_device(info->dock);
1279
1280         return 0;
1281 }
1282
1283 static struct platform_driver max77693_muic_driver = {
1284         .driver         = {
1285                 .name   = DEV_NAME,
1286         },
1287         .probe          = max77693_muic_probe,
1288         .remove         = max77693_muic_remove,
1289 };
1290
1291 module_platform_driver(max77693_muic_driver);
1292
1293 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1294 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1295 MODULE_LICENSE("GPL");
1296 MODULE_ALIAS("platform:extcon-max77693");