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_OTG = 0x100,      /* 0x0|      0|     0|    0| */
 194         MAX77693_MUIC_GND_USB_OTG_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_USB_ON,
 213         EXTCON_CABLE_JIG_USB_OFF,
 214         EXTCON_CABLE_JIG_UART_OFF,
 215         EXTCON_CABLE_JIG_UART_ON,
 216         EXTCON_CABLE_DOCK_SMART,
 217         EXTCON_CABLE_DOCK_DESK,
 218         EXTCON_CABLE_DOCK_AUDIO,
 219
 220         _EXTCON_CABLE_NUM,
 221 };
 222
 223 static const char *max77693_extcon_cable[] = {
 224         [EXTCON_CABLE_USB]                      = "USB",
 225         [EXTCON_CABLE_USB_HOST]                 = "USB-Host",
 226         [EXTCON_CABLE_TA]                       = "TA",
 227         [EXTCON_CABLE_FAST_CHARGER]             = "Fast-charger",
 228         [EXTCON_CABLE_SLOW_CHARGER]             = "Slow-charger",
 229         [EXTCON_CABLE_CHARGE_DOWNSTREAM]        = "Charge-downstream",
 230         [EXTCON_CABLE_MHL]                      = "MHL",
 231         [EXTCON_CABLE_MHL_TA]                   = "MHL_TA",
 232         [EXTCON_CABLE_JIG_USB_ON]               = "JIG-USB-ON",
 233         [EXTCON_CABLE_JIG_USB_OFF]              = "JIG-USB-OFF",
 234         [EXTCON_CABLE_JIG_UART_OFF]             = "JIG-UART-OFF",
 235         [EXTCON_CABLE_JIG_UART_ON]              = "Dock-Car",
 236         [EXTCON_CABLE_DOCK_SMART]               = "Dock-Smart",
 237         [EXTCON_CABLE_DOCK_DESK]                = "Dock-Desk",
 238         [EXTCON_CABLE_DOCK_AUDIO]               = "Dock-Audio",
 239
 240         NULL,
 241 };
 242
 243 /*
 244  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 245  * @info: the instance including private data of max77693 MUIC
 246  * @time: the debounce time of ADC
 247  */
 248 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 249                 enum max77693_muic_adc_debounce_time time)
 250 {
 251         int ret;
 252
 253         switch (time) {
 254         case ADC_DEBOUNCE_TIME_5MS:
 255         case ADC_DEBOUNCE_TIME_10MS:
 256         case ADC_DEBOUNCE_TIME_25MS:
 257         case ADC_DEBOUNCE_TIME_38_62MS:
 258                 ret = regmap_update_bits(info->max77693->regmap_muic,
 259                                           MAX77693_MUIC_REG_CTRL3,
 260                                           CONTROL3_ADCDBSET_MASK,
 261                                           time << CONTROL3_ADCDBSET_SHIFT);
 262                 if (ret) {
 263                         dev_err(info->dev, "failed to set ADC debounce time\n");
 264                         return ret;
 265                 }
 266                 break;
 267         default:
 268                 dev_err(info->dev, "invalid ADC debounce time\n");
 269                 return -EINVAL;
 270         }
 271
 272         return 0;
 273 };
 274
 275 /*
 276  * max77693_muic_set_path - Set hardware line according to attached cable
 277  * @info: the instance including private data of max77693 MUIC
 278  * @value: the path according to attached cable
 279  * @attached: the state of cable (true:attached, false:detached)
 280  *
 281  * The max77693 MUIC device share outside H/W line among a varity of cables
 282  * so, this function set internal path of H/W line according to the type of
 283  * attached cable.
 284  */
 285 static int max77693_muic_set_path(struct max77693_muic_info *info,
 286                 u8 val, bool attached)
 287 {
 288         int ret = 0;
 289         unsigned int ctrl1, ctrl2 = 0;
 290
 291         if (attached)
 292                 ctrl1 = val;
 293         else
 294                 ctrl1 = CONTROL1_SW_OPEN;
 295
 296         ret = regmap_update_bits(info->max77693->regmap_muic,
 297                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 298         if (ret < 0) {
 299                 dev_err(info->dev, "failed to update MUIC register\n");
 300                 return ret;
 301         }
 302
 303         if (attached)
 304                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 305         else
 306                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 307
 308         ret = regmap_update_bits(info->max77693->regmap_muic,
 309                         MAX77693_MUIC_REG_CTRL2,
 310                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
 311         if (ret < 0) {
 312                 dev_err(info->dev, "failed to update MUIC register\n");
 313                 return ret;
 314         }
 315
 316         dev_info(info->dev,
 317                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 318                 ctrl1, ctrl2, attached ? "attached" : "detached");
 319
 320         return 0;
 321 }
 322
 323 /*
 324  * max77693_muic_get_cable_type - Return cable type and check cable state
 325  * @info: the instance including private data of max77693 MUIC
 326  * @group: the path according to attached cable
 327  * @attached: store cable state and return
 328  *
 329  * This function check the cable state either attached or detached,
 330  * and then divide precise type of cable according to cable group.
 331  *      - MAX77693_CABLE_GROUP_ADC
 332  *      - MAX77693_CABLE_GROUP_ADC_GND
 333  *      - MAX77693_CABLE_GROUP_CHG
 334  *      - MAX77693_CABLE_GROUP_VBVOLT
 335  */
 336 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 337                 enum max77693_muic_cable_group group, bool *attached)
 338 {
 339         int cable_type = 0;
 340         int adc;
 341         int adc1k;
 342         int adclow;
 343         int vbvolt;
 344         int chg_type;
 345
 346         switch (group) {
 347         case MAX77693_CABLE_GROUP_ADC:
 348                 /*
 349                  * Read ADC value to check cable type and decide cable state
 350                  * according to cable type
 351                  */
 352                 adc = info->status[0] & STATUS1_ADC_MASK;
 353                 adc >>= STATUS1_ADC_SHIFT;
 354
 355                 /*
 356                  * Check current cable state/cable type and store cable type
 357                  * (info->prev_cable_type) for handling cable when cable is
 358                  * detached.
 359                  */
 360                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 361                         *attached = false;
 362
 363                         cable_type = info->prev_cable_type;
 364                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 365                 } else {
 366                         *attached = true;
 367
 368                         cable_type = info->prev_cable_type = adc;
 369                 }
 370                 break;
 371         case MAX77693_CABLE_GROUP_ADC_GND:
 372                 /*
 373                  * Read ADC value to check cable type and decide cable state
 374                  * according to cable type
 375                  */
 376                 adc = info->status[0] & STATUS1_ADC_MASK;
 377                 adc >>= STATUS1_ADC_SHIFT;
 378
 379                 /*
 380                  * Check current cable state/cable type and store cable type
 381                  * (info->prev_cable_type/_gnd) for handling cable when cable
 382                  * is detached.
 383                  */
 384                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 385                         *attached = false;
 386
 387                         cable_type = info->prev_cable_type_gnd;
 388                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 389                 } else {
 390                         *attached = true;
 391
 392                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 393                         adclow >>= STATUS1_ADCLOW_SHIFT;
 394                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 395                         adc1k >>= STATUS1_ADC1K_SHIFT;
 396
 397                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 398                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
 399
 400                         /**
 401                          * [0x1|VBVolt|ADCLow|ADC1K]
 402                          * [0x1|     0|     0|    0] USB_OTG
 403                          * [0x1|     1|     0|    0] USB_OTG_VB
 404                          * [0x1|     0|     1|    0] Audio Video cable with load
 405                          * [0x1|     0|     1|    1] MHL without charging cable
 406                          * [0x1|     1|     1|    1] MHL with charging cable
 407                          */
 408                         cable_type = ((0x1 << 8)
 409                                         | (vbvolt << 2)
 410                                         | (adclow << 1)
 411                                         | adc1k);
 412
 413                         info->prev_cable_type = adc;
 414                         info->prev_cable_type_gnd = cable_type;
 415                 }
 416
 417                 break;
 418         case MAX77693_CABLE_GROUP_CHG:
 419                 /*
 420                  * Read charger type to check cable type and decide cable state
 421                  * according to type of charger cable.
 422                  */
 423                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 424                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 425
 426                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 427                         *attached = false;
 428
 429                         cable_type = info->prev_chg_type;
 430                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 431                 } else {
 432                         *attached = true;
 433
 434                         /*
 435                          * Check current cable state/cable type and store cable
 436                          * type(info->prev_chg_type) for handling cable when
 437                          * charger cable is detached.
 438                          */
 439                         cable_type = info->prev_chg_type = chg_type;
 440                 }
 441
 442                 break;
 443         case MAX77693_CABLE_GROUP_VBVOLT:
 444                 /*
 445                  * Read ADC value to check cable type and decide cable state
 446                  * according to cable type
 447                  */
 448                 adc = info->status[0] & STATUS1_ADC_MASK;
 449                 adc >>= STATUS1_ADC_SHIFT;
 450                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 451                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 452
 453                 if (adc == MAX77693_MUIC_ADC_OPEN
 454                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 455                         *attached = false;
 456                 else
 457                         *attached = true;
 458
 459                 /*
 460                  * Read vbvolt field, if vbvolt is 1,
 461                  * this cable is used for charging.
 462                  */
 463                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 464                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
 465
 466                 cable_type = vbvolt;
 467                 break;
 468         default:
 469                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 470                 cable_type = -EINVAL;
 471                 break;
 472         }
 473
 474         return cable_type;
 475 }
 476
 477 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 478                 int cable_type, bool attached)
 479 {
 480         int ret = 0;
 481         int vbvolt;
 482         bool cable_attached;
 483         char dock_name[CABLE_NAME_MAX];
 484
 485         dev_info(info->dev,
 486                 "external connector is %s (adc:0x%02x)\n",
 487                 attached ? "attached" : "detached", cable_type);
 488
 489         switch (cable_type) {
 490         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 491                 /*
 492                  * Check power cable whether attached or detached state.
 493                  * The Dock-Smart device need surely external power supply.
 494                  * If power cable(USB/TA) isn't connected to Dock device,
 495                  * user can't use Dock-Smart for desktop mode.
 496                  */
 497                 vbvolt = max77693_muic_get_cable_type(info,
 498                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 499                 if (attached && !vbvolt) {
 500                         dev_warn(info->dev,
 501                                 "Cannot detect external power supply\n");
 502                         return 0;
 503                 }
 504
 505                 /*
 506                  * Notify Dock-Smart/MHL state.
 507                  * - Dock-Smart device include three type of cable which
 508                  * are HDMI, USB for mouse/keyboard and micro-usb port
 509                  * for USB/TA cable. Dock-Smart device need always exteranl
 510                  * power supply(USB/TA cable through micro-usb cable). Dock-
 511                  * Smart device support screen output of target to separate
 512                  * monitor and mouse/keyboard for desktop mode.
 513                  *
 514                  * Features of 'USB/TA cable with Dock-Smart device'
 515                  * - Support MHL
 516                  * - Support external output feature of audio
 517                  * - Support charging through micro-usb port without data
 518                  *           connection if TA cable is connected to target.
 519                  * - Support charging and data connection through micro-usb port
 520                  *           if USB cable is connected between target and host
 521                  *           device.
 522                  * - Support OTG device (Mouse/Keyboard)
 523                  */
 524                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 525                 if (ret < 0)
 526                         return ret;
 527
 528                 extcon_set_cable_state(info->edev, "Dock-Smart", attached);
 529                 extcon_set_cable_state(info->edev, "MHL", attached);
 530                 goto out;
 531         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
 532                 strcpy(dock_name, "Dock-Car");
 533                 break;
 534         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 535                 strcpy(dock_name, "Dock-Desk");
 536                 break;
 537         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 538                 strcpy(dock_name, "Dock-Audio");
 539                 if (!attached)
 540                         extcon_set_cable_state(info->edev, "USB", false);
 541                 break;
 542         default:
 543                 dev_err(info->dev, "failed to detect %s dock device\n",
 544                         attached ? "attached" : "detached");
 545                 return -EINVAL;
 546         }
 547
 548         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 549         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 550         if (ret < 0)
 551                 return ret;
 552         extcon_set_cable_state(info->edev, dock_name, attached);
 553
 554 out:
 555         return 0;
 556 }
 557
 558 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 559                 int button_type, bool attached)
 560 {
 561         struct input_dev *dock = info->dock;
 562         unsigned int code;
 563
 564         switch (button_type) {
 565         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 566                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 567                 /* DOCK_KEY_PREV */
 568                 code = KEY_PREVIOUSSONG;
 569                 break;
 570         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 571                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 572                 /* DOCK_KEY_NEXT */
 573                 code = KEY_NEXTSONG;
 574                 break;
 575         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 576                 /* DOCK_VOL_DOWN */
 577                 code = KEY_VOLUMEDOWN;
 578                 break;
 579         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 580                 /* DOCK_VOL_UP */
 581                 code = KEY_VOLUMEUP;
 582                 break;
 583         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 584                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 585                 /* DOCK_KEY_PLAY_PAUSE */
 586                 code = KEY_PLAYPAUSE;
 587                 break;
 588         default:
 589                 dev_err(info->dev,
 590                         "failed to detect %s key (adc:0x%x)\n",
 591                         attached ? "pressed" : "released", button_type);
 592                 return -EINVAL;
 593         }
 594
 595         input_event(dock, EV_KEY, code, attached);
 596         input_sync(dock);
 597
 598         return 0;
 599 }
 600
 601 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 602 {
 603         int cable_type_gnd;
 604         int ret = 0;
 605         bool attached;
 606
 607         cable_type_gnd = max77693_muic_get_cable_type(info,
 608                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 609
 610         switch (cable_type_gnd) {
 611         case MAX77693_MUIC_GND_USB_OTG:
 612         case MAX77693_MUIC_GND_USB_OTG_VB:
 613                 /* USB_OTG, PATH: AP_USB */
 614                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 615                 if (ret < 0)
 616                         return ret;
 617                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 618                 break;
 619         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 620                 /* Audio Video Cable with load, PATH:AUDIO */
 621                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 622                 if (ret < 0)
 623                         return ret;
 624                 extcon_set_cable_state(info->edev,
 625                                 "Audio-video-load", attached);
 626                 break;
 627         case MAX77693_MUIC_GND_MHL:
 628         case MAX77693_MUIC_GND_MHL_VB:
 629                 /* MHL or MHL with USB/TA cable */
 630                 extcon_set_cable_state(info->edev, "MHL", attached);
 631                 break;
 632         default:
 633                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 634                         attached ? "attached" : "detached");
 635                 return -EINVAL;
 636         }
 637
 638         return 0;
 639 }
 640
 641 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 642                 int cable_type, bool attached)
 643 {
 644         char cable_name[32];
 645         int ret = 0;
 646         u8 path = CONTROL1_SW_OPEN;
 647
 648         dev_info(info->dev,
 649                 "external connector is %s (adc:0x%02x)\n",
 650                 attached ? "attached" : "detached", cable_type);
 651
 652         switch (cable_type) {
 653         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 654                 /* PATH:AP_USB */
 655                 strcpy(cable_name, "JIG-USB-OFF");
 656                 path = CONTROL1_SW_USB;
 657                 break;
 658         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 659                 /* PATH:AP_USB */
 660                 strcpy(cable_name, "JIG-USB-ON");
 661                 path = CONTROL1_SW_USB;
 662                 break;
 663         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 664                 /* PATH:AP_UART */
 665                 strcpy(cable_name, "JIG-UART-OFF");
 666                 path = CONTROL1_SW_UART;
 667                 break;
 668         default:
 669                 dev_err(info->dev, "failed to detect %s jig cable\n",
 670                         attached ? "attached" : "detached");
 671                 return -EINVAL;
 672         }
 673
 674         ret = max77693_muic_set_path(info, path, attached);
 675         if (ret < 0)
 676                 return ret;
 677
 678         extcon_set_cable_state(info->edev, cable_name, attached);
 679
 680         return 0;
 681 }
 682
 683 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 684 {
 685         int cable_type;
 686         int button_type;
 687         bool attached;
 688         int ret = 0;
 689
 690         /* Check accessory state which is either detached or attached */
 691         cable_type = max77693_muic_get_cable_type(info,
 692                                 MAX77693_CABLE_GROUP_ADC, &attached);
 693
 694         dev_info(info->dev,
 695                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 696                 attached ? "attached" : "detached", cable_type,
 697                 info->prev_cable_type);
 698
 699         switch (cable_type) {
 700         case MAX77693_MUIC_ADC_GROUND:
 701                 /* USB_OTG/MHL/Audio */
 702                 max77693_muic_adc_ground_handler(info);
 703                 break;
 704         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 705         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 706         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 707                 /* JIG */
 708                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 709                 if (ret < 0)
 710                         return ret;
 711                 break;
 712         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 713         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* Dock-Car */
 714         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 715         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 716                 /*
 717                  * DOCK device
 718                  *
 719                  * The MAX77693 MUIC device can detect total 34 cable type
 720                  * except of charger cable and MUIC device didn't define
 721                  * specfic role of cable in the range of from 0x01 to 0x12
 722                  * of ADC value. So, can use/define cable with no role according
 723                  * to schema of hardware board.
 724                  */
 725                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 726                 if (ret < 0)
 727                         return ret;
 728                 break;
 729         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 730         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 731         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 732         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 733         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 734                 /*
 735                  * Button of DOCK device
 736                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 737                  *
 738                  * The MAX77693 MUIC device can detect total 34 cable type
 739                  * except of charger cable and MUIC device didn't define
 740                  * specfic role of cable in the range of from 0x01 to 0x12
 741                  * of ADC value. So, can use/define cable with no role according
 742                  * to schema of hardware board.
 743                  */
 744                 if (attached)
 745                         button_type = info->prev_button_type = cable_type;
 746                 else
 747                         button_type = info->prev_button_type;
 748
 749                 ret = max77693_muic_dock_button_handler(info, button_type,
 750                                                         attached);
 751                 if (ret < 0)
 752                         return ret;
 753                 break;
 754         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 755         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 756         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 757         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 758         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 759         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 760         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 761         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 762         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 763         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 764         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 765         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 766         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 767         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 768         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 769         case MAX77693_MUIC_ADC_UART_CABLE:
 770         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 771         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 772                 /*
 773                  * This accessory isn't used in general case if it is specially
 774                  * needed to detect additional accessory, should implement
 775                  * proper operation when this accessory is attached/detached.
 776                  */
 777                 dev_info(info->dev,
 778                         "accessory is %s but it isn't used (adc:0x%x)\n",
 779                         attached ? "attached" : "detached", cable_type);
 780                 return -EAGAIN;
 781         default:
 782                 dev_err(info->dev,
 783                         "failed to detect %s accessory (adc:0x%x)\n",
 784                         attached ? "attached" : "detached", cable_type);
 785                 return -EINVAL;
 786         }
 787
 788         return 0;
 789 }
 790
 791 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 792 {
 793         int chg_type;
 794         int cable_type_gnd;
 795         int cable_type;
 796         bool attached;
 797         bool cable_attached;
 798         int ret = 0;
 799
 800         chg_type = max77693_muic_get_cable_type(info,
 801                                 MAX77693_CABLE_GROUP_CHG, &attached);
 802
 803         dev_info(info->dev,
 804                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 805                         attached ? "attached" : "detached",
 806                         chg_type, info->prev_chg_type);
 807
 808         switch (chg_type) {
 809         case MAX77693_CHARGER_TYPE_USB:
 810         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 811         case MAX77693_CHARGER_TYPE_NONE:
 812                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 813                 cable_type_gnd = max77693_muic_get_cable_type(info,
 814                                         MAX77693_CABLE_GROUP_ADC_GND,
 815                                         &cable_attached);
 816                 switch (cable_type_gnd) {
 817                 case MAX77693_MUIC_GND_MHL:
 818                 case MAX77693_MUIC_GND_MHL_VB:
 819                         /*
 820                          * MHL cable with MHL_TA(USB/TA) cable
 821                          * - MHL cable include two port(HDMI line and separate
 822                          * micro-usb port. When the target connect MHL cable,
 823                          * extcon driver check whether MHL_TA(USB/TA) cable is
 824                          * connected. If MHL_TA cable is connected, extcon
 825                          * driver notify state to notifiee for charging battery.
 826                          *
 827                          * Features of 'MHL_TA(USB/TA) with MHL cable'
 828                          * - Support MHL
 829                          * - Support charging through micro-usb port without
 830                          *   data connection
 831                          */
 832                         extcon_set_cable_state(info->edev, "MHL_TA", attached);
 833                         if (!cable_attached)
 834                                 extcon_set_cable_state(info->edev,
 835                                                       "MHL", cable_attached);
 836                         break;
 837                 }
 838
 839                 /* Check MAX77693_CABLE_GROUP_ADC type */
 840                 cable_type = max77693_muic_get_cable_type(info,
 841                                         MAX77693_CABLE_GROUP_ADC,
 842                                         &cable_attached);
 843                 switch (cable_type) {
 844                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 845                         /*
 846                          * Dock-Audio device with USB/TA cable
 847                          * - Dock device include two port(Dock-Audio and micro-
 848                          * usb port). When the target connect Dock-Audio device,
 849                          * extcon driver check whether USB/TA cable is connected
 850                          * or not. If USB/TA cable is connected, extcon driver
 851                          * notify state to notifiee for charging battery.
 852                          *
 853                          * Features of 'USB/TA cable with Dock-Audio device'
 854                          * - Support external output feature of audio.
 855                          * - Support charging through micro-usb port without
 856                          *   data connection.
 857                          */
 858                         extcon_set_cable_state(info->edev, "USB", attached);
 859
 860                         if (!cable_attached)
 861                                 extcon_set_cable_state(info->edev, "Dock-Audio",
 862                                                       cable_attached);
 863                         break;
 864                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 865                         /*
 866                          * Dock-Smart device with USB/TA cable
 867                          * - Dock-Desk device include three type of cable which
 868                          * are HDMI, USB for mouse/keyboard and micro-usb port
 869                          * for USB/TA cable. Dock-Smart device need always
 870                          * exteranl power supply(USB/TA cable through micro-usb
 871                          * cable). Dock-Smart device support screen output of
 872                          * target to separate monitor and mouse/keyboard for
 873                          * desktop mode.
 874                          *
 875                          * Features of 'USB/TA cable with Dock-Smart device'
 876                          * - Support MHL
 877                          * - Support external output feature of audio
 878                          * - Support charging through micro-usb port without
 879                          *   data connection if TA cable is connected to target.
 880                          * - Support charging and data connection through micro-
 881                          *   usb port if USB cable is connected between target
 882                          *   and host device
 883                          * - Support OTG device (Mouse/Keyboard)
 884                          */
 885                         ret = max77693_muic_set_path(info, info->path_usb,
 886                                                     attached);
 887                         if (ret < 0)
 888                                 return ret;
 889
 890                         extcon_set_cable_state(info->edev, "Dock-Smart",
 891                                               attached);
 892                         extcon_set_cable_state(info->edev, "MHL", attached);
 893
 894                         break;
 895                 }
 896
 897                 /* Check MAX77693_CABLE_GROUP_CHG type */
 898                 switch (chg_type) {
 899                 case MAX77693_CHARGER_TYPE_NONE:
 900                         /*
 901                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 902                          * cable is attached, muic device happen below two irq.
 903                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 904                          *    MHL/Dock-Audio.
 905                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 906                          *    USB/TA cable connected to MHL or Dock-Audio.
 907                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 908                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 909                          *
 910                          * If user attach MHL (with USB/TA cable and immediately
 911                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 912                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 913                          * connected state to target. But USB/TA cable isn't
 914                          * connected to target. The user be face with unusual
 915                          * action. So, driver should check this situation in
 916                          * spite of, that previous charger type is N/A.
 917                          */
 918                         break;
 919                 case MAX77693_CHARGER_TYPE_USB:
 920                         /* Only USB cable, PATH:AP_USB */
 921                         ret = max77693_muic_set_path(info, info->path_usb,
 922                                                     attached);
 923                         if (ret < 0)
 924                                 return ret;
 925
 926                         extcon_set_cable_state(info->edev, "USB", attached);
 927                         break;
 928                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 929                         /* Only TA cable */
 930                         extcon_set_cable_state(info->edev, "TA", attached);
 931                         break;
 932                 }
 933                 break;
 934         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 935                 extcon_set_cable_state(info->edev,
 936                                 "Charge-downstream", attached);
 937                 break;
 938         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 939                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 940                 break;
 941         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 942                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 943                 break;
 944         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 945                 break;
 946         default:
 947                 dev_err(info->dev,
 948                         "failed to detect %s accessory (chg_type:0x%x)\n",
 949                         attached ? "attached" : "detached", chg_type);
 950                 return -EINVAL;
 951         }
 952
 953         return 0;
 954 }
 955
 956 static void max77693_muic_irq_work(struct work_struct *work)
 957 {
 958         struct max77693_muic_info *info = container_of(work,
 959                         struct max77693_muic_info, irq_work);
 960         int irq_type = -1;
 961         int i, ret = 0;
 962
 963         if (!info->edev)
 964                 return;
 965
 966         mutex_lock(&info->mutex);
 967
 968         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 969                 if (info->irq == muic_irqs[i].virq)
 970                         irq_type = muic_irqs[i].irq;
 971
 972         ret = regmap_bulk_read(info->max77693->regmap_muic,
 973                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 974         if (ret) {
 975                 dev_err(info->dev, "failed to read MUIC register\n");
 976                 mutex_unlock(&info->mutex);
 977                 return;
 978         }
 979
 980         switch (irq_type) {
 981         case MAX77693_MUIC_IRQ_INT1_ADC:
 982         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 983         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 984         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 985                 /* Handle all of accessory except for
 986                    type of charger accessory */
 987                 ret = max77693_muic_adc_handler(info);
 988                 break;
 989         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 990         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 991         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 992         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 993         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 994         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 995                 /* Handle charger accessory */
 996                 ret = max77693_muic_chg_handler(info);
 997                 break;
 998         case MAX77693_MUIC_IRQ_INT3_EOC:
 999         case MAX77693_MUIC_IRQ_INT3_CGMBC:
1000         case MAX77693_MUIC_IRQ_INT3_OVP:
1001         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
1002         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
1003         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
1004                 break;
1005         default:
1006                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
1007                                 irq_type);
1008                 mutex_unlock(&info->mutex);
1009                 return;
1010         }
1011
1012         if (ret < 0)
1013                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1014
1015         mutex_unlock(&info->mutex);
1016
1017         return;
1018 }
1019
1020 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1021 {
1022         struct max77693_muic_info *info = data;
1023
1024         info->irq = irq;
1025         schedule_work(&info->irq_work);
1026
1027         return IRQ_HANDLED;
1028 }
1029
1030 static struct regmap_config max77693_muic_regmap_config = {
1031         .reg_bits = 8,
1032         .val_bits = 8,
1033 };
1034
1035 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1036 {
1037         int ret = 0;
1038         int adc;
1039         int chg_type;
1040         bool attached;
1041
1042         mutex_lock(&info->mutex);
1043
1044         /* Read STATUSx register to detect accessory */
1045         ret = regmap_bulk_read(info->max77693->regmap_muic,
1046                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1047         if (ret) {
1048                 dev_err(info->dev, "failed to read MUIC register\n");
1049                 mutex_unlock(&info->mutex);
1050                 return ret;
1051         }
1052
1053         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1054                                         &attached);
1055         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1056                 ret = max77693_muic_adc_handler(info);
1057                 if (ret < 0) {
1058                         dev_err(info->dev, "Cannot detect accessory\n");
1059                         mutex_unlock(&info->mutex);
1060                         return ret;
1061                 }
1062         }
1063
1064         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1065                                         &attached);
1066         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1067                 ret = max77693_muic_chg_handler(info);
1068                 if (ret < 0) {
1069                         dev_err(info->dev, "Cannot detect charger accessory\n");
1070                         mutex_unlock(&info->mutex);
1071                         return ret;
1072                 }
1073         }
1074
1075         mutex_unlock(&info->mutex);
1076
1077         return 0;
1078 }
1079
1080 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1081 {
1082         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1083                                 struct max77693_muic_info, wq_detcable);
1084
1085         max77693_muic_detect_accessory(info);
1086 }
1087
1088 static int max77693_muic_probe(struct platform_device *pdev)
1089 {
1090         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1091         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1092         struct max77693_muic_info *info;
1093         struct max77693_reg_data *init_data;
1094         int num_init_data;
1095         int delay_jiffies;
1096         int ret;
1097         int i;
1098         unsigned int id;
1099
1100         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1101                                    GFP_KERNEL);
1102         if (!info)
1103                 return -ENOMEM;
1104
1105         info->dev = &pdev->dev;
1106         info->max77693 = max77693;
1107         if (info->max77693->regmap_muic) {
1108                 dev_dbg(&pdev->dev, "allocate register map\n");
1109         } else {
1110                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1111                                                 info->max77693->muic,
1112                                                 &max77693_muic_regmap_config);
1113                 if (IS_ERR(info->max77693->regmap_muic)) {
1114                         ret = PTR_ERR(info->max77693->regmap_muic);
1115                         dev_err(max77693->dev,
1116                                 "failed to allocate register map: %d\n", ret);
1117                         return ret;
1118                 }
1119         }
1120
1121         /* Register input device for button of dock device */
1122         info->dock = devm_input_allocate_device(&pdev->dev);
1123         if (!info->dock) {
1124                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1125                 return -ENOMEM;
1126         }
1127         info->dock->name = "max77693-muic/dock";
1128         info->dock->phys = "max77693-muic/extcon";
1129         info->dock->dev.parent = &pdev->dev;
1130
1131         __set_bit(EV_REP, info->dock->evbit);
1132
1133         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1134         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1135         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1136         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1137         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1138
1139         ret = input_register_device(info->dock);
1140         if (ret < 0) {
1141                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1142                                 ret);
1143                 return ret;
1144         }
1145
1146         platform_set_drvdata(pdev, info);
1147         mutex_init(&info->mutex);
1148
1149         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1150
1151         /* Support irq domain for MAX77693 MUIC device */
1152         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1153                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1154                 unsigned int virq = 0;
1155
1156                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1157                                         muic_irq->irq);
1158                 if (!virq) {
1159                         ret = -EINVAL;
1160                         goto err_irq;
1161                 }
1162                 muic_irq->virq = virq;
1163
1164                 ret = request_threaded_irq(virq, NULL,
1165                                 max77693_muic_irq_handler,
1166                                 IRQF_NO_SUSPEND,
1167                                 muic_irq->name, info);
1168                 if (ret) {
1169                         dev_err(&pdev->dev,
1170                                 "failed: irq request (IRQ: %d,"
1171                                 " error :%d)\n",
1172                                 muic_irq->irq, ret);
1173                         goto err_irq;
1174                 }
1175         }
1176
1177         /* Initialize extcon device */
1178         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1179                                               max77693_extcon_cable);
1180         if (IS_ERR(info->edev)) {
1181                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1182                 ret = -ENOMEM;
1183                 goto err_irq;
1184         }
1185         info->edev->name = DEV_NAME;
1186
1187         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1188         if (ret) {
1189                 dev_err(&pdev->dev, "failed to register extcon device\n");
1190                 goto err_irq;
1191         }
1192
1193         /* Initialize MUIC register by using platform data or default data */
1194         if (pdata && pdata->muic_data) {
1195                 init_data = pdata->muic_data->init_data;
1196                 num_init_data = pdata->muic_data->num_init_data;
1197         } else {
1198                 init_data = default_init_data;
1199                 num_init_data = ARRAY_SIZE(default_init_data);
1200         }
1201
1202         for (i = 0; i < num_init_data; i++) {
1203                 enum max77693_irq_source irq_src
1204                                 = MAX77693_IRQ_GROUP_NR;
1205
1206                 regmap_write(info->max77693->regmap_muic,
1207                                 init_data[i].addr,
1208                                 init_data[i].data);
1209
1210                 switch (init_data[i].addr) {
1211                 case MAX77693_MUIC_REG_INTMASK1:
1212                         irq_src = MUIC_INT1;
1213                         break;
1214                 case MAX77693_MUIC_REG_INTMASK2:
1215                         irq_src = MUIC_INT2;
1216                         break;
1217                 case MAX77693_MUIC_REG_INTMASK3:
1218                         irq_src = MUIC_INT3;
1219                         break;
1220                 }
1221
1222                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1223                         info->max77693->irq_masks_cur[irq_src]
1224                                 = init_data[i].data;
1225         }
1226
1227         if (pdata && pdata->muic_data) {
1228                 struct max77693_muic_platform_data *muic_pdata
1229                                                    = pdata->muic_data;
1230
1231                 /*
1232                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1233                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1234                  */
1235                 if (muic_pdata->path_uart)
1236                         info->path_uart = muic_pdata->path_uart;
1237                 else
1238                         info->path_uart = CONTROL1_SW_UART;
1239
1240                 if (muic_pdata->path_usb)
1241                         info->path_usb = muic_pdata->path_usb;
1242                 else
1243                         info->path_usb = CONTROL1_SW_USB;
1244
1245                 /*
1246                  * Default delay time for detecting cable state
1247                  * after certain time.
1248                  */
1249                 if (muic_pdata->detcable_delay_ms)
1250                         delay_jiffies =
1251                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1252                 else
1253                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1254         } else {
1255                 info->path_usb = CONTROL1_SW_USB;
1256                 info->path_uart = CONTROL1_SW_UART;
1257                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1258         }
1259
1260         /* Set initial path for UART */
1261          max77693_muic_set_path(info, info->path_uart, true);
1262
1263         /* Check revision number of MUIC device*/
1264         ret = regmap_read(info->max77693->regmap_muic,
1265                         MAX77693_MUIC_REG_ID, &id);
1266         if (ret < 0) {
1267                 dev_err(&pdev->dev, "failed to read revision number\n");
1268                 goto err_irq;
1269         }
1270         dev_info(info->dev, "device ID : 0x%x\n", id);
1271
1272         /* Set ADC debounce time */
1273         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1274
1275         /*
1276          * Detect accessory after completing the initialization of platform
1277          *
1278          * - Use delayed workqueue to detect cable state and then
1279          * notify cable state to notifiee/platform through uevent.
1280          * After completing the booting of platform, the extcon provider
1281          * driver should notify cable state to upper layer.
1282          */
1283         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1284         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1285                         delay_jiffies);
1286
1287         return ret;
1288
1289 err_irq:
1290         while (--i >= 0)
1291                 free_irq(muic_irqs[i].virq, info);
1292         return ret;
1293 }
1294
1295 static int max77693_muic_remove(struct platform_device *pdev)
1296 {
1297         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1298         int i;
1299
1300         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
1301                 free_irq(muic_irqs[i].virq, info);
1302         cancel_work_sync(&info->irq_work);
1303         input_unregister_device(info->dock);
1304
1305         return 0;
1306 }
1307
1308 static struct platform_driver max77693_muic_driver = {
1309         .driver         = {
1310                 .name   = DEV_NAME,
1311                 .owner  = THIS_MODULE,
1312         },
1313         .probe          = max77693_muic_probe,
1314         .remove         = max77693_muic_remove,
1315 };
1316
1317 module_platform_driver(max77693_muic_driver);
1318
1319 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1320 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1321 MODULE_LICENSE("GPL");
1322 MODULE_ALIAS("platform:extcon-max77693");