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_JIG,
 212         EXTCON_CABLE_DOCK,
 213
 214         _EXTCON_CABLE_NUM,
 215 };
 216
 217 static const char *max77693_extcon_cable[] = {
 218         [EXTCON_CABLE_USB]                      = "USB",
 219         [EXTCON_CABLE_USB_HOST]                 = "USB-Host",
 220         [EXTCON_CABLE_TA]                       = "TA",
 221         [EXTCON_CABLE_FAST_CHARGER]             = "Fast-charger",
 222         [EXTCON_CABLE_SLOW_CHARGER]             = "Slow-charger",
 223         [EXTCON_CABLE_CHARGE_DOWNSTREAM]        = "Charge-downstream",
 224         [EXTCON_CABLE_MHL]                      = "MHL",
 225         [EXTCON_CABLE_JIG]                      = "JIG",
 226         [EXTCON_CABLE_DOCK]                     = "DOCK",
 227
 228         NULL,
 229 };
 230
 231 /*
 232  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 233  * @info: the instance including private data of max77693 MUIC
 234  * @time: the debounce time of ADC
 235  */
 236 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 237                 enum max77693_muic_adc_debounce_time time)
 238 {
 239         int ret;
 240
 241         switch (time) {
 242         case ADC_DEBOUNCE_TIME_5MS:
 243         case ADC_DEBOUNCE_TIME_10MS:
 244         case ADC_DEBOUNCE_TIME_25MS:
 245         case ADC_DEBOUNCE_TIME_38_62MS:
 246                 /*
 247                  * Don't touch BTLDset, JIGset when you want to change adc
 248                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 249                  * muic device will be reset and loose current state.
 250                  */
 251                 ret = regmap_write(info->max77693->regmap_muic,
 252                                   MAX77693_MUIC_REG_CTRL3,
 253                                   time << CONTROL3_ADCDBSET_SHIFT);
 254                 if (ret) {
 255                         dev_err(info->dev, "failed to set ADC debounce time\n");
 256                         return ret;
 257                 }
 258                 break;
 259         default:
 260                 dev_err(info->dev, "invalid ADC debounce time\n");
 261                 return -EINVAL;
 262         }
 263
 264         return 0;
 265 };
 266
 267 /*
 268  * max77693_muic_set_path - Set hardware line according to attached cable
 269  * @info: the instance including private data of max77693 MUIC
 270  * @value: the path according to attached cable
 271  * @attached: the state of cable (true:attached, false:detached)
 272  *
 273  * The max77693 MUIC device share outside H/W line among a varity of cables
 274  * so, this function set internal path of H/W line according to the type of
 275  * attached cable.
 276  */
 277 static int max77693_muic_set_path(struct max77693_muic_info *info,
 278                 u8 val, bool attached)
 279 {
 280         int ret = 0;
 281         unsigned int ctrl1, ctrl2 = 0;
 282
 283         if (attached)
 284                 ctrl1 = val;
 285         else
 286                 ctrl1 = CONTROL1_SW_OPEN;
 287
 288         ret = regmap_update_bits(info->max77693->regmap_muic,
 289                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 290         if (ret < 0) {
 291                 dev_err(info->dev, "failed to update MUIC register\n");
 292                 return ret;
 293         }
 294
 295         if (attached)
 296                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 297         else
 298                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 299
 300         ret = regmap_update_bits(info->max77693->regmap_muic,
 301                         MAX77693_MUIC_REG_CTRL2,
 302                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
 303         if (ret < 0) {
 304                 dev_err(info->dev, "failed to update MUIC register\n");
 305                 return ret;
 306         }
 307
 308         dev_info(info->dev,
 309                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 310                 ctrl1, ctrl2, attached ? "attached" : "detached");
 311
 312         return 0;
 313 }
 314
 315 /*
 316  * max77693_muic_get_cable_type - Return cable type and check cable state
 317  * @info: the instance including private data of max77693 MUIC
 318  * @group: the path according to attached cable
 319  * @attached: store cable state and return
 320  *
 321  * This function check the cable state either attached or detached,
 322  * and then divide precise type of cable according to cable group.
 323  *      - MAX77693_CABLE_GROUP_ADC
 324  *      - MAX77693_CABLE_GROUP_ADC_GND
 325  *      - MAX77693_CABLE_GROUP_CHG
 326  *      - MAX77693_CABLE_GROUP_VBVOLT
 327  */
 328 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 329                 enum max77693_muic_cable_group group, bool *attached)
 330 {
 331         int cable_type = 0;
 332         int adc;
 333         int adc1k;
 334         int adclow;
 335         int vbvolt;
 336         int chg_type;
 337
 338         switch (group) {
 339         case MAX77693_CABLE_GROUP_ADC:
 340                 /*
 341                  * Read ADC value to check cable type and decide cable state
 342                  * according to cable type
 343                  */
 344                 adc = info->status[0] & STATUS1_ADC_MASK;
 345                 adc >>= STATUS1_ADC_SHIFT;
 346
 347                 /*
 348                  * Check current cable state/cable type and store cable type
 349                  * (info->prev_cable_type) for handling cable when cable is
 350                  * detached.
 351                  */
 352                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 353                         *attached = false;
 354
 355                         cable_type = info->prev_cable_type;
 356                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 357                 } else {
 358                         *attached = true;
 359
 360                         cable_type = info->prev_cable_type = adc;
 361                 }
 362                 break;
 363         case MAX77693_CABLE_GROUP_ADC_GND:
 364                 /*
 365                  * Read ADC value to check cable type and decide cable state
 366                  * according to cable type
 367                  */
 368                 adc = info->status[0] & STATUS1_ADC_MASK;
 369                 adc >>= STATUS1_ADC_SHIFT;
 370
 371                 /*
 372                  * Check current cable state/cable type and store cable type
 373                  * (info->prev_cable_type/_gnd) for handling cable when cable
 374                  * is detached.
 375                  */
 376                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 377                         *attached = false;
 378
 379                         cable_type = info->prev_cable_type_gnd;
 380                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 381                 } else {
 382                         *attached = true;
 383
 384                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 385                         adclow >>= STATUS1_ADCLOW_SHIFT;
 386                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 387                         adc1k >>= STATUS1_ADC1K_SHIFT;
 388
 389                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 390                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
 391
 392                         /**
 393                          * [0x1|VBVolt|ADCLow|ADC1K]
 394                          * [0x1|     0|     0|    0] USB_HOST
 395                          * [0x1|     1|     0|    0] USB_HSOT_VB
 396                          * [0x1|     0|     1|    0] Audio Video cable with load
 397                          * [0x1|     0|     1|    1] MHL without charging cable
 398                          * [0x1|     1|     1|    1] MHL with charging cable
 399                          */
 400                         cable_type = ((0x1 << 8)
 401                                         | (vbvolt << 2)
 402                                         | (adclow << 1)
 403                                         | adc1k);
 404
 405                         info->prev_cable_type = adc;
 406                         info->prev_cable_type_gnd = cable_type;
 407                 }
 408
 409                 break;
 410         case MAX77693_CABLE_GROUP_CHG:
 411                 /*
 412                  * Read charger type to check cable type and decide cable state
 413                  * according to type of charger cable.
 414                  */
 415                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 416                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 417
 418                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 419                         *attached = false;
 420
 421                         cable_type = info->prev_chg_type;
 422                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 423                 } else {
 424                         *attached = true;
 425
 426                         /*
 427                          * Check current cable state/cable type and store cable
 428                          * type(info->prev_chg_type) for handling cable when
 429                          * charger cable is detached.
 430                          */
 431                         cable_type = info->prev_chg_type = chg_type;
 432                 }
 433
 434                 break;
 435         case MAX77693_CABLE_GROUP_VBVOLT:
 436                 /*
 437                  * Read ADC value to check cable type and decide cable state
 438                  * according to cable type
 439                  */
 440                 adc = info->status[0] & STATUS1_ADC_MASK;
 441                 adc >>= STATUS1_ADC_SHIFT;
 442                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 443                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 444
 445                 if (adc == MAX77693_MUIC_ADC_OPEN
 446                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 447                         *attached = false;
 448                 else
 449                         *attached = true;
 450
 451                 /*
 452                  * Read vbvolt field, if vbvolt is 1,
 453                  * this cable is used for charging.
 454                  */
 455                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 456                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
 457
 458                 cable_type = vbvolt;
 459                 break;
 460         default:
 461                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 462                 cable_type = -EINVAL;
 463                 break;
 464         }
 465
 466         return cable_type;
 467 }
 468
 469 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 470                 int cable_type, bool attached)
 471 {
 472         int ret = 0;
 473         int vbvolt;
 474         bool cable_attached;
 475         char dock_name[CABLE_NAME_MAX];
 476
 477         dev_info(info->dev,
 478                 "external connector is %s (adc:0x%02x)\n",
 479                 attached ? "attached" : "detached", cable_type);
 480
 481         switch (cable_type) {
 482         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 483                 /*
 484                  * Check power cable whether attached or detached state.
 485                  * The Dock-Smart device need surely external power supply.
 486                  * If power cable(USB/TA) isn't connected to Dock device,
 487                  * user can't use Dock-Smart for desktop mode.
 488                  */
 489                 vbvolt = max77693_muic_get_cable_type(info,
 490                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 491                 if (attached && !vbvolt) {
 492                         dev_warn(info->dev,
 493                                 "Cannot detect external power supply\n");
 494                         return 0;
 495                 }
 496
 497                 /*
 498                  * Notify Dock/MHL state.
 499                  * - Dock device include three type of cable which
 500                  * are HDMI, USB for mouse/keyboard and micro-usb port
 501                  * for USB/TA cable. Dock device need always exteranl
 502                  * power supply(USB/TA cable through micro-usb cable). Dock
 503                  * device support screen output of target to separate
 504                  * monitor and mouse/keyboard for desktop mode.
 505                  *
 506                  * Features of 'USB/TA cable with Dock device'
 507                  * - Support MHL
 508                  * - Support external output feature of audio
 509                  * - Support charging through micro-usb port without data
 510                  *           connection if TA cable is connected to target.
 511                  * - Support charging and data connection through micro-usb port
 512                  *           if USB cable is connected between target and host
 513                  *           device.
 514                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 515                  */
 516                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 517                 if (ret < 0)
 518                         return ret;
 519
 520                 extcon_set_cable_state(info->edev, "DOCK", attached);
 521                 extcon_set_cable_state(info->edev, "MHL", attached);
 522                 goto out;
 523         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 524                 strcpy(dock_name, "DOCK");
 525                 break;
 526         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 527                 strcpy(dock_name, "DOCK");
 528                 if (!attached)
 529                         extcon_set_cable_state(info->edev, "USB", false);
 530                 break;
 531         default:
 532                 dev_err(info->dev, "failed to detect %s dock device\n",
 533                         attached ? "attached" : "detached");
 534                 return -EINVAL;
 535         }
 536
 537         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 538         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 539         if (ret < 0)
 540                 return ret;
 541         extcon_set_cable_state(info->edev, dock_name, attached);
 542
 543 out:
 544         return 0;
 545 }
 546
 547 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 548                 int button_type, bool attached)
 549 {
 550         struct input_dev *dock = info->dock;
 551         unsigned int code;
 552
 553         switch (button_type) {
 554         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 555                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 556                 /* DOCK_KEY_PREV */
 557                 code = KEY_PREVIOUSSONG;
 558                 break;
 559         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 560                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 561                 /* DOCK_KEY_NEXT */
 562                 code = KEY_NEXTSONG;
 563                 break;
 564         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 565                 /* DOCK_VOL_DOWN */
 566                 code = KEY_VOLUMEDOWN;
 567                 break;
 568         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 569                 /* DOCK_VOL_UP */
 570                 code = KEY_VOLUMEUP;
 571                 break;
 572         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 573                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 574                 /* DOCK_KEY_PLAY_PAUSE */
 575                 code = KEY_PLAYPAUSE;
 576                 break;
 577         default:
 578                 dev_err(info->dev,
 579                         "failed to detect %s key (adc:0x%x)\n",
 580                         attached ? "pressed" : "released", button_type);
 581                 return -EINVAL;
 582         }
 583
 584         input_event(dock, EV_KEY, code, attached);
 585         input_sync(dock);
 586
 587         return 0;
 588 }
 589
 590 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 591 {
 592         int cable_type_gnd;
 593         int ret = 0;
 594         bool attached;
 595
 596         cable_type_gnd = max77693_muic_get_cable_type(info,
 597                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 598
 599         switch (cable_type_gnd) {
 600         case MAX77693_MUIC_GND_USB_HOST:
 601         case MAX77693_MUIC_GND_USB_HOST_VB:
 602                 /* USB_HOST, PATH: AP_USB */
 603                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 604                 if (ret < 0)
 605                         return ret;
 606                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 607                 break;
 608         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 609                 /* Audio Video Cable with load, PATH:AUDIO */
 610                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 611                 if (ret < 0)
 612                         return ret;
 613                 extcon_set_cable_state(info->edev,
 614                                 "Audio-video-load", attached);
 615                 break;
 616         case MAX77693_MUIC_GND_MHL:
 617         case MAX77693_MUIC_GND_MHL_VB:
 618                 /* MHL or MHL with USB/TA cable */
 619                 extcon_set_cable_state(info->edev, "MHL", attached);
 620                 break;
 621         default:
 622                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 623                         attached ? "attached" : "detached");
 624                 return -EINVAL;
 625         }
 626
 627         return 0;
 628 }
 629
 630 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 631                 int cable_type, bool attached)
 632 {
 633         int ret = 0;
 634         u8 path = CONTROL1_SW_OPEN;
 635
 636         dev_info(info->dev,
 637                 "external connector is %s (adc:0x%02x)\n",
 638                 attached ? "attached" : "detached", cable_type);
 639
 640         switch (cable_type) {
 641         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 642         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 643                 /* PATH:AP_USB */
 644                 path = CONTROL1_SW_USB;
 645                 break;
 646         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 647         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 648                 /* PATH:AP_UART */
 649                 path = CONTROL1_SW_UART;
 650                 break;
 651         default:
 652                 dev_err(info->dev, "failed to detect %s jig cable\n",
 653                         attached ? "attached" : "detached");
 654                 return -EINVAL;
 655         }
 656
 657         ret = max77693_muic_set_path(info, path, attached);
 658         if (ret < 0)
 659                 return ret;
 660
 661         extcon_set_cable_state(info->edev, "JIG", attached);
 662
 663         return 0;
 664 }
 665
 666 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 667 {
 668         int cable_type;
 669         int button_type;
 670         bool attached;
 671         int ret = 0;
 672
 673         /* Check accessory state which is either detached or attached */
 674         cable_type = max77693_muic_get_cable_type(info,
 675                                 MAX77693_CABLE_GROUP_ADC, &attached);
 676
 677         dev_info(info->dev,
 678                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 679                 attached ? "attached" : "detached", cable_type,
 680                 info->prev_cable_type);
 681
 682         switch (cable_type) {
 683         case MAX77693_MUIC_ADC_GROUND:
 684                 /* USB_HOST/MHL/Audio */
 685                 max77693_muic_adc_ground_handler(info);
 686                 break;
 687         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 688         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 689         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 690         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 691                 /* JIG */
 692                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 693                 if (ret < 0)
 694                         return ret;
 695                 break;
 696         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 697         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 698         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 699                 /*
 700                  * DOCK device
 701                  *
 702                  * The MAX77693 MUIC device can detect total 34 cable type
 703                  * except of charger cable and MUIC device didn't define
 704                  * specfic role of cable in the range of from 0x01 to 0x12
 705                  * of ADC value. So, can use/define cable with no role according
 706                  * to schema of hardware board.
 707                  */
 708                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 709                 if (ret < 0)
 710                         return ret;
 711                 break;
 712         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 713         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 714         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 715         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 716         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 717                 /*
 718                  * Button of DOCK device
 719                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 720                  *
 721                  * The MAX77693 MUIC device can detect total 34 cable type
 722                  * except of charger cable and MUIC device didn't define
 723                  * specfic role of cable in the range of from 0x01 to 0x12
 724                  * of ADC value. So, can use/define cable with no role according
 725                  * to schema of hardware board.
 726                  */
 727                 if (attached)
 728                         button_type = info->prev_button_type = cable_type;
 729                 else
 730                         button_type = info->prev_button_type;
 731
 732                 ret = max77693_muic_dock_button_handler(info, button_type,
 733                                                         attached);
 734                 if (ret < 0)
 735                         return ret;
 736                 break;
 737         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 738         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 739         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 740         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 741         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 742         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 743         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 744         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 745         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 746         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 747         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 748         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 749         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 750         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 751         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 752         case MAX77693_MUIC_ADC_UART_CABLE:
 753         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 754         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 755                 /*
 756                  * This accessory isn't used in general case if it is specially
 757                  * needed to detect additional accessory, should implement
 758                  * proper operation when this accessory is attached/detached.
 759                  */
 760                 dev_info(info->dev,
 761                         "accessory is %s but it isn't used (adc:0x%x)\n",
 762                         attached ? "attached" : "detached", cable_type);
 763                 return -EAGAIN;
 764         default:
 765                 dev_err(info->dev,
 766                         "failed to detect %s accessory (adc:0x%x)\n",
 767                         attached ? "attached" : "detached", cable_type);
 768                 return -EINVAL;
 769         }
 770
 771         return 0;
 772 }
 773
 774 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 775 {
 776         int chg_type;
 777         int cable_type_gnd;
 778         int cable_type;
 779         bool attached;
 780         bool cable_attached;
 781         int ret = 0;
 782
 783         chg_type = max77693_muic_get_cable_type(info,
 784                                 MAX77693_CABLE_GROUP_CHG, &attached);
 785
 786         dev_info(info->dev,
 787                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 788                         attached ? "attached" : "detached",
 789                         chg_type, info->prev_chg_type);
 790
 791         switch (chg_type) {
 792         case MAX77693_CHARGER_TYPE_USB:
 793         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 794         case MAX77693_CHARGER_TYPE_NONE:
 795                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 796                 cable_type_gnd = max77693_muic_get_cable_type(info,
 797                                         MAX77693_CABLE_GROUP_ADC_GND,
 798                                         &cable_attached);
 799                 switch (cable_type_gnd) {
 800                 case MAX77693_MUIC_GND_MHL:
 801                 case MAX77693_MUIC_GND_MHL_VB:
 802                         /*
 803                          * MHL cable with USB/TA cable
 804                          * - MHL cable include two port(HDMI line and separate
 805                          * micro-usb port. When the target connect MHL cable,
 806                          * extcon driver check whether USB/TA cable is
 807                          * connected. If USB/TA cable is connected, extcon
 808                          * driver notify state to notifiee for charging battery.
 809                          *
 810                          * Features of 'USB/TA with MHL cable'
 811                          * - Support MHL
 812                          * - Support charging through micro-usb port without
 813                          *   data connection
 814                          */
 815                         extcon_set_cable_state(info->edev, "TA", attached);
 816                         if (!cable_attached)
 817                                 extcon_set_cable_state(info->edev,
 818                                                       "MHL", cable_attached);
 819                         break;
 820                 }
 821
 822                 /* Check MAX77693_CABLE_GROUP_ADC type */
 823                 cable_type = max77693_muic_get_cable_type(info,
 824                                         MAX77693_CABLE_GROUP_ADC,
 825                                         &cable_attached);
 826                 switch (cable_type) {
 827                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 828                         /*
 829                          * Dock-Audio device with USB/TA cable
 830                          * - Dock device include two port(Dock-Audio and micro-
 831                          * usb port). When the target connect Dock-Audio device,
 832                          * extcon driver check whether USB/TA cable is connected
 833                          * or not. If USB/TA cable is connected, extcon driver
 834                          * notify state to notifiee for charging battery.
 835                          *
 836                          * Features of 'USB/TA cable with Dock-Audio device'
 837                          * - Support external output feature of audio.
 838                          * - Support charging through micro-usb port without
 839                          *   data connection.
 840                          */
 841                         extcon_set_cable_state(info->edev, "USB", attached);
 842
 843                         if (!cable_attached)
 844                                 extcon_set_cable_state(info->edev, "DOCK",
 845                                                       cable_attached);
 846                         break;
 847                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 848                         /*
 849                          * Dock-Smart device with USB/TA cable
 850                          * - Dock-Desk device include three type of cable which
 851                          * are HDMI, USB for mouse/keyboard and micro-usb port
 852                          * for USB/TA cable. Dock-Smart device need always
 853                          * exteranl power supply(USB/TA cable through micro-usb
 854                          * cable). Dock-Smart device support screen output of
 855                          * target to separate monitor and mouse/keyboard for
 856                          * desktop mode.
 857                          *
 858                          * Features of 'USB/TA cable with Dock-Smart device'
 859                          * - Support MHL
 860                          * - Support external output feature of audio
 861                          * - Support charging through micro-usb port without
 862                          *   data connection if TA cable is connected to target.
 863                          * - Support charging and data connection through micro-
 864                          *   usb port if USB cable is connected between target
 865                          *   and host device
 866                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 867                          */
 868                         ret = max77693_muic_set_path(info, info->path_usb,
 869                                                     attached);
 870                         if (ret < 0)
 871                                 return ret;
 872
 873                         extcon_set_cable_state(info->edev, "DOCK", attached);
 874                         extcon_set_cable_state(info->edev, "MHL", attached);
 875
 876                         break;
 877                 }
 878
 879                 /* Check MAX77693_CABLE_GROUP_CHG type */
 880                 switch (chg_type) {
 881                 case MAX77693_CHARGER_TYPE_NONE:
 882                         /*
 883                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 884                          * cable is attached, muic device happen below two irq.
 885                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 886                          *    MHL/Dock-Audio.
 887                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 888                          *    USB/TA cable connected to MHL or Dock-Audio.
 889                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 890                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 891                          *
 892                          * If user attach MHL (with USB/TA cable and immediately
 893                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 894                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 895                          * connected state to target. But USB/TA cable isn't
 896                          * connected to target. The user be face with unusual
 897                          * action. So, driver should check this situation in
 898                          * spite of, that previous charger type is N/A.
 899                          */
 900                         break;
 901                 case MAX77693_CHARGER_TYPE_USB:
 902                         /* Only USB cable, PATH:AP_USB */
 903                         ret = max77693_muic_set_path(info, info->path_usb,
 904                                                     attached);
 905                         if (ret < 0)
 906                                 return ret;
 907
 908                         extcon_set_cable_state(info->edev, "USB", attached);
 909                         break;
 910                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 911                         /* Only TA cable */
 912                         extcon_set_cable_state(info->edev, "TA", attached);
 913                         break;
 914                 }
 915                 break;
 916         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 917                 extcon_set_cable_state(info->edev,
 918                                 "Charge-downstream", attached);
 919                 break;
 920         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 921                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 922                 break;
 923         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 924                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 925                 break;
 926         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 927                 break;
 928         default:
 929                 dev_err(info->dev,
 930                         "failed to detect %s accessory (chg_type:0x%x)\n",
 931                         attached ? "attached" : "detached", chg_type);
 932                 return -EINVAL;
 933         }
 934
 935         return 0;
 936 }
 937
 938 static void max77693_muic_irq_work(struct work_struct *work)
 939 {
 940         struct max77693_muic_info *info = container_of(work,
 941                         struct max77693_muic_info, irq_work);
 942         int irq_type = -1;
 943         int i, ret = 0;
 944
 945         if (!info->edev)
 946                 return;
 947
 948         mutex_lock(&info->mutex);
 949
 950         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 951                 if (info->irq == muic_irqs[i].virq)
 952                         irq_type = muic_irqs[i].irq;
 953
 954         ret = regmap_bulk_read(info->max77693->regmap_muic,
 955                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 956         if (ret) {
 957                 dev_err(info->dev, "failed to read MUIC register\n");
 958                 mutex_unlock(&info->mutex);
 959                 return;
 960         }
 961
 962         switch (irq_type) {
 963         case MAX77693_MUIC_IRQ_INT1_ADC:
 964         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 965         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 966         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 967                 /* Handle all of accessory except for
 968                    type of charger accessory */
 969                 ret = max77693_muic_adc_handler(info);
 970                 break;
 971         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 972         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 973         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 974         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 975         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 976         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 977                 /* Handle charger accessory */
 978                 ret = max77693_muic_chg_handler(info);
 979                 break;
 980         case MAX77693_MUIC_IRQ_INT3_EOC:
 981         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 982         case MAX77693_MUIC_IRQ_INT3_OVP:
 983         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 984         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 985         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 986                 break;
 987         default:
 988                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 989                                 irq_type);
 990                 mutex_unlock(&info->mutex);
 991                 return;
 992         }
 993
 994         if (ret < 0)
 995                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 996
 997         mutex_unlock(&info->mutex);
 998 }
 999
1000 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1001 {
1002         struct max77693_muic_info *info = data;
1003
1004         info->irq = irq;
1005         schedule_work(&info->irq_work);
1006
1007         return IRQ_HANDLED;
1008 }
1009
1010 static const struct regmap_config max77693_muic_regmap_config = {
1011         .reg_bits = 8,
1012         .val_bits = 8,
1013 };
1014
1015 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1016 {
1017         int ret = 0;
1018         int adc;
1019         int chg_type;
1020         bool attached;
1021
1022         mutex_lock(&info->mutex);
1023
1024         /* Read STATUSx register to detect accessory */
1025         ret = regmap_bulk_read(info->max77693->regmap_muic,
1026                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1027         if (ret) {
1028                 dev_err(info->dev, "failed to read MUIC register\n");
1029                 mutex_unlock(&info->mutex);
1030                 return ret;
1031         }
1032
1033         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1034                                         &attached);
1035         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1036                 ret = max77693_muic_adc_handler(info);
1037                 if (ret < 0) {
1038                         dev_err(info->dev, "Cannot detect accessory\n");
1039                         mutex_unlock(&info->mutex);
1040                         return ret;
1041                 }
1042         }
1043
1044         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1045                                         &attached);
1046         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1047                 ret = max77693_muic_chg_handler(info);
1048                 if (ret < 0) {
1049                         dev_err(info->dev, "Cannot detect charger accessory\n");
1050                         mutex_unlock(&info->mutex);
1051                         return ret;
1052                 }
1053         }
1054
1055         mutex_unlock(&info->mutex);
1056
1057         return 0;
1058 }
1059
1060 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1061 {
1062         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1063                                 struct max77693_muic_info, wq_detcable);
1064
1065         max77693_muic_detect_accessory(info);
1066 }
1067
1068 static int max77693_muic_probe(struct platform_device *pdev)
1069 {
1070         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1071         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1072         struct max77693_muic_info *info;
1073         struct max77693_reg_data *init_data;
1074         int num_init_data;
1075         int delay_jiffies;
1076         int ret;
1077         int i;
1078         unsigned int id;
1079
1080         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1081                                    GFP_KERNEL);
1082         if (!info)
1083                 return -ENOMEM;
1084
1085         info->dev = &pdev->dev;
1086         info->max77693 = max77693;
1087         if (info->max77693->regmap_muic) {
1088                 dev_dbg(&pdev->dev, "allocate register map\n");
1089         } else {
1090                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1091                                                 info->max77693->muic,
1092                                                 &max77693_muic_regmap_config);
1093                 if (IS_ERR(info->max77693->regmap_muic)) {
1094                         ret = PTR_ERR(info->max77693->regmap_muic);
1095                         dev_err(max77693->dev,
1096                                 "failed to allocate register map: %d\n", ret);
1097                         return ret;
1098                 }
1099         }
1100
1101         /* Register input device for button of dock device */
1102         info->dock = devm_input_allocate_device(&pdev->dev);
1103         if (!info->dock) {
1104                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1105                 return -ENOMEM;
1106         }
1107         info->dock->name = "max77693-muic/dock";
1108         info->dock->phys = "max77693-muic/extcon";
1109         info->dock->dev.parent = &pdev->dev;
1110
1111         __set_bit(EV_REP, info->dock->evbit);
1112
1113         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1114         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1115         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1116         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1117         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1118
1119         ret = input_register_device(info->dock);
1120         if (ret < 0) {
1121                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1122                                 ret);
1123                 return ret;
1124         }
1125
1126         platform_set_drvdata(pdev, info);
1127         mutex_init(&info->mutex);
1128
1129         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1130
1131         /* Support irq domain for MAX77693 MUIC device */
1132         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1133                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1134                 unsigned int virq = 0;
1135
1136                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1137                                         muic_irq->irq);
1138                 if (!virq)
1139                         return -EINVAL;
1140                 muic_irq->virq = virq;
1141
1142                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1143                                 max77693_muic_irq_handler,
1144                                 IRQF_NO_SUSPEND,
1145                                 muic_irq->name, info);
1146                 if (ret) {
1147                         dev_err(&pdev->dev,
1148                                 "failed: irq request (IRQ: %d, error :%d)\n",
1149                                 muic_irq->irq, ret);
1150                         return ret;
1151                 }
1152         }
1153
1154         /* Initialize extcon device */
1155         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1156                                               max77693_extcon_cable);
1157         if (IS_ERR(info->edev)) {
1158                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1159                 return -ENOMEM;
1160         }
1161
1162         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1163         if (ret) {
1164                 dev_err(&pdev->dev, "failed to register extcon device\n");
1165                 return ret;
1166         }
1167
1168         /* Initialize MUIC register by using platform data or default data */
1169         if (pdata && pdata->muic_data) {
1170                 init_data = pdata->muic_data->init_data;
1171                 num_init_data = pdata->muic_data->num_init_data;
1172         } else {
1173                 init_data = default_init_data;
1174                 num_init_data = ARRAY_SIZE(default_init_data);
1175         }
1176
1177         for (i = 0; i < num_init_data; i++) {
1178                 enum max77693_irq_source irq_src
1179                                 = MAX77693_IRQ_GROUP_NR;
1180
1181                 regmap_write(info->max77693->regmap_muic,
1182                                 init_data[i].addr,
1183                                 init_data[i].data);
1184
1185                 switch (init_data[i].addr) {
1186                 case MAX77693_MUIC_REG_INTMASK1:
1187                         irq_src = MUIC_INT1;
1188                         break;
1189                 case MAX77693_MUIC_REG_INTMASK2:
1190                         irq_src = MUIC_INT2;
1191                         break;
1192                 case MAX77693_MUIC_REG_INTMASK3:
1193                         irq_src = MUIC_INT3;
1194                         break;
1195                 }
1196
1197                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1198                         info->max77693->irq_masks_cur[irq_src]
1199                                 = init_data[i].data;
1200         }
1201
1202         if (pdata && pdata->muic_data) {
1203                 struct max77693_muic_platform_data *muic_pdata
1204                                                    = pdata->muic_data;
1205
1206                 /*
1207                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1208                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1209                  */
1210                 if (muic_pdata->path_uart)
1211                         info->path_uart = muic_pdata->path_uart;
1212                 else
1213                         info->path_uart = CONTROL1_SW_UART;
1214
1215                 if (muic_pdata->path_usb)
1216                         info->path_usb = muic_pdata->path_usb;
1217                 else
1218                         info->path_usb = CONTROL1_SW_USB;
1219
1220                 /*
1221                  * Default delay time for detecting cable state
1222                  * after certain time.
1223                  */
1224                 if (muic_pdata->detcable_delay_ms)
1225                         delay_jiffies =
1226                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1227                 else
1228                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1229         } else {
1230                 info->path_usb = CONTROL1_SW_USB;
1231                 info->path_uart = CONTROL1_SW_UART;
1232                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1233         }
1234
1235         /* Set initial path for UART */
1236          max77693_muic_set_path(info, info->path_uart, true);
1237
1238         /* Check revision number of MUIC device*/
1239         ret = regmap_read(info->max77693->regmap_muic,
1240                         MAX77693_MUIC_REG_ID, &id);
1241         if (ret < 0) {
1242                 dev_err(&pdev->dev, "failed to read revision number\n");
1243                 return ret;
1244         }
1245         dev_info(info->dev, "device ID : 0x%x\n", id);
1246
1247         /* Set ADC debounce time */
1248         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1249
1250         /*
1251          * Detect accessory after completing the initialization of platform
1252          *
1253          * - Use delayed workqueue to detect cable state and then
1254          * notify cable state to notifiee/platform through uevent.
1255          * After completing the booting of platform, the extcon provider
1256          * driver should notify cable state to upper layer.
1257          */
1258         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1259         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1260                         delay_jiffies);
1261
1262         return ret;
1263 }
1264
1265 static int max77693_muic_remove(struct platform_device *pdev)
1266 {
1267         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1268
1269         cancel_work_sync(&info->irq_work);
1270         input_unregister_device(info->dock);
1271
1272         return 0;
1273 }
1274
1275 static struct platform_driver max77693_muic_driver = {
1276         .driver         = {
1277                 .name   = DEV_NAME,
1278         },
1279         .probe          = max77693_muic_probe,
1280         .remove         = max77693_muic_remove,
1281 };
1282
1283 module_platform_driver(max77693_muic_driver);
1284
1285 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1286 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1287 MODULE_LICENSE("GPL");
1288 MODULE_ALIAS("platform:extcon-max77693");