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