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-common.h>
  28 #include <linux/mfd/max77693-private.h>
  29 #include <linux/extcon.h>
  30 #include <linux/regmap.h>
  31 #include <linux/irqdomain.h>
  32
  33 #define DEV_NAME                        "max77693-muic"
  34 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
  35
  36 /*
  37  * Default value of MAX77693 register to bring up MUIC device.
  38  * If user don't set some initial value for MUIC device through platform data,
  39  * extcon-max77693 driver use 'default_init_data' to bring up base operation
  40  * of MAX77693 MUIC device.
  41  */
  42 static struct max77693_reg_data default_init_data[] = {
  43         {
  44                 /* STATUS2 - [3]ChgDetRun */
  45                 .addr = MAX77693_MUIC_REG_STATUS2,
  46                 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
  47         }, {
  48                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
  49                 .addr = MAX77693_MUIC_REG_INTMASK1,
  50                 .data = INTMASK1_ADC1K_MASK
  51                         | INTMASK1_ADC_MASK,
  52         }, {
  53                 /* INTMASK2 - Unmask [0]ChgTypM */
  54                 .addr = MAX77693_MUIC_REG_INTMASK2,
  55                 .data = INTMASK2_CHGTYP_MASK,
  56         }, {
  57                 /* INTMASK3 - Mask all of interrupts */
  58                 .addr = MAX77693_MUIC_REG_INTMASK3,
  59                 .data = 0x0,
  60         }, {
  61                 /* CDETCTRL2 */
  62                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
  63                 .data = CDETCTRL2_VIDRMEN_MASK
  64                         | CDETCTRL2_DXOVPEN_MASK,
  65         },
  66 };
  67
  68 enum max77693_muic_adc_debounce_time {
  69         ADC_DEBOUNCE_TIME_5MS = 0,
  70         ADC_DEBOUNCE_TIME_10MS,
  71         ADC_DEBOUNCE_TIME_25MS,
  72         ADC_DEBOUNCE_TIME_38_62MS,
  73 };
  74
  75 struct max77693_muic_info {
  76         struct device *dev;
  77         struct max77693_dev *max77693;
  78         struct extcon_dev *edev;
  79         int prev_cable_type;
  80         int prev_cable_type_gnd;
  81         int prev_chg_type;
  82         int prev_button_type;
  83         u8 status[2];
  84
  85         int irq;
  86         struct work_struct irq_work;
  87         struct mutex mutex;
  88
  89         /*
  90          * Use delayed workqueue to detect cable state and then
  91          * notify cable state to notifiee/platform through uevent.
  92          * After completing the booting of platform, the extcon provider
  93          * driver should notify cable state to upper layer.
  94          */
  95         struct delayed_work wq_detcable;
  96
  97         /* Button of dock device */
  98         struct input_dev *dock;
  99
 100         /*
 101          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
 102          * h/w path of COMP2/COMN1 on CONTROL1 register.
 103          */
 104         int path_usb;
 105         int path_uart;
 106 };
 107
 108 enum max77693_muic_cable_group {
 109         MAX77693_CABLE_GROUP_ADC = 0,
 110         MAX77693_CABLE_GROUP_ADC_GND,
 111         MAX77693_CABLE_GROUP_CHG,
 112         MAX77693_CABLE_GROUP_VBVOLT,
 113 };
 114
 115 enum max77693_muic_charger_type {
 116         MAX77693_CHARGER_TYPE_NONE = 0,
 117         MAX77693_CHARGER_TYPE_USB,
 118         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 119         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 120         MAX77693_CHARGER_TYPE_APPLE_500MA,
 121         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 122         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 123 };
 124
 125 /**
 126  * struct max77693_muic_irq
 127  * @irq: the index of irq list of MUIC device.
 128  * @name: the name of irq.
 129  * @virq: the virtual irq to use irq domain
 130  */
 131 struct max77693_muic_irq {
 132         unsigned int irq;
 133         const char *name;
 134         unsigned int virq;
 135 };
 136
 137 static struct max77693_muic_irq muic_irqs[] = {
 138         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 139         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 140         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 141         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 142         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 143         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 144         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 145         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 146         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 147         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 148         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 149         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 150         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 151         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 152         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 153         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 154 };
 155
 156 /* Define supported accessory type */
 157 enum max77693_muic_acc_type {
 158         MAX77693_MUIC_ADC_GROUND = 0x0,
 159         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 160         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 161         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 162         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 163         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 164         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 165         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 166         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 167         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 168         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 169         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 170         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 171         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 172         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 173         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 174         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 175         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 176         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 177         MAX77693_MUIC_ADC_CEA936_AUDIO,
 178         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 179         MAX77693_MUIC_ADC_TTY_CONVERTER,
 180         MAX77693_MUIC_ADC_UART_CABLE,
 181         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 182         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 183         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 184         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 185         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 186         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 187         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 188         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 189         MAX77693_MUIC_ADC_OPEN,
 190
 191         /* The below accessories have same ADC value so ADCLow and
 192            ADC1K bit is used to separate specific accessory */
 193                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
 194         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
 195         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
 196         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
 197         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
 198         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
 199 };
 200
 201 /*
 202  * MAX77693 MUIC device support below list of accessories(external connector)
 203  */
 204 static const unsigned int max77693_extcon_cable[] = {
 205         EXTCON_USB,
 206         EXTCON_USB_HOST,
 207         EXTCON_CHG_USB_SDP,
 208         EXTCON_CHG_USB_DCP,
 209         EXTCON_CHG_USB_FAST,
 210         EXTCON_CHG_USB_SLOW,
 211         EXTCON_CHG_USB_CDP,
 212         EXTCON_DISP_MHL,
 213         EXTCON_JIG,
 214         EXTCON_DOCK,
 215         EXTCON_NONE,
 216 };
 217
 218 /*
 219  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 220  * @info: the instance including private data of max77693 MUIC
 221  * @time: the debounce time of ADC
 222  */
 223 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 224                 enum max77693_muic_adc_debounce_time time)
 225 {
 226         int ret;
 227
 228         switch (time) {
 229         case ADC_DEBOUNCE_TIME_5MS:
 230         case ADC_DEBOUNCE_TIME_10MS:
 231         case ADC_DEBOUNCE_TIME_25MS:
 232         case ADC_DEBOUNCE_TIME_38_62MS:
 233                 /*
 234                  * Don't touch BTLDset, JIGset when you want to change adc
 235                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 236                  * muic device will be reset and loose current state.
 237                  */
 238                 ret = regmap_write(info->max77693->regmap_muic,
 239                                   MAX77693_MUIC_REG_CTRL3,
 240                                   time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
 241                 if (ret) {
 242                         dev_err(info->dev, "failed to set ADC debounce time\n");
 243                         return ret;
 244                 }
 245                 break;
 246         default:
 247                 dev_err(info->dev, "invalid ADC debounce time\n");
 248                 return -EINVAL;
 249         }
 250
 251         return 0;
 252 };
 253
 254 /*
 255  * max77693_muic_set_path - Set hardware line according to attached cable
 256  * @info: the instance including private data of max77693 MUIC
 257  * @value: the path according to attached cable
 258  * @attached: the state of cable (true:attached, false:detached)
 259  *
 260  * The max77693 MUIC device share outside H/W line among a varity of cables
 261  * so, this function set internal path of H/W line according to the type of
 262  * attached cable.
 263  */
 264 static int max77693_muic_set_path(struct max77693_muic_info *info,
 265                 u8 val, bool attached)
 266 {
 267         int ret = 0;
 268         unsigned int ctrl1, ctrl2 = 0;
 269
 270         if (attached)
 271                 ctrl1 = val;
 272         else
 273                 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
 274
 275         ret = regmap_update_bits(info->max77693->regmap_muic,
 276                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 277         if (ret < 0) {
 278                 dev_err(info->dev, "failed to update MUIC register\n");
 279                 return ret;
 280         }
 281
 282         if (attached)
 283                 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;   /* LowPwr=0, CPEn=1 */
 284         else
 285                 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
 286
 287         ret = regmap_update_bits(info->max77693->regmap_muic,
 288                         MAX77693_MUIC_REG_CTRL2,
 289                         MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
 290                         ctrl2);
 291         if (ret < 0) {
 292                 dev_err(info->dev, "failed to update MUIC register\n");
 293                 return ret;
 294         }
 295
 296         dev_info(info->dev,
 297                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 298                 ctrl1, ctrl2, attached ? "attached" : "detached");
 299
 300         return 0;
 301 }
 302
 303 /*
 304  * max77693_muic_get_cable_type - Return cable type and check cable state
 305  * @info: the instance including private data of max77693 MUIC
 306  * @group: the path according to attached cable
 307  * @attached: store cable state and return
 308  *
 309  * This function check the cable state either attached or detached,
 310  * and then divide precise type of cable according to cable group.
 311  *      - MAX77693_CABLE_GROUP_ADC
 312  *      - MAX77693_CABLE_GROUP_ADC_GND
 313  *      - MAX77693_CABLE_GROUP_CHG
 314  *      - MAX77693_CABLE_GROUP_VBVOLT
 315  */
 316 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 317                 enum max77693_muic_cable_group group, bool *attached)
 318 {
 319         int cable_type = 0;
 320         int adc;
 321         int adc1k;
 322         int adclow;
 323         int vbvolt;
 324         int chg_type;
 325
 326         switch (group) {
 327         case MAX77693_CABLE_GROUP_ADC:
 328                 /*
 329                  * Read ADC value to check cable type and decide cable state
 330                  * according to cable type
 331                  */
 332                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 333                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 334
 335                 /*
 336                  * Check current cable state/cable type and store cable type
 337                  * (info->prev_cable_type) for handling cable when cable is
 338                  * detached.
 339                  */
 340                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 341                         *attached = false;
 342
 343                         cable_type = info->prev_cable_type;
 344                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 345                 } else {
 346                         *attached = true;
 347
 348                         cable_type = info->prev_cable_type = adc;
 349                 }
 350                 break;
 351         case MAX77693_CABLE_GROUP_ADC_GND:
 352                 /*
 353                  * Read ADC value to check cable type and decide cable state
 354                  * according to cable type
 355                  */
 356                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 357                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 358
 359                 /*
 360                  * Check current cable state/cable type and store cable type
 361                  * (info->prev_cable_type/_gnd) for handling cable when cable
 362                  * is detached.
 363                  */
 364                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 365                         *attached = false;
 366
 367                         cable_type = info->prev_cable_type_gnd;
 368                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 369                 } else {
 370                         *attached = true;
 371
 372                         adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
 373                         adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
 374                         adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
 375                         adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
 376
 377                         vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 378                         vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 379
 380                         /**
 381                          * [0x1|VBVolt|ADCLow|ADC1K]
 382                          * [0x1|     0|     0|    0] USB_HOST
 383                          * [0x1|     1|     0|    0] USB_HSOT_VB
 384                          * [0x1|     0|     1|    0] Audio Video cable with load
 385                          * [0x1|     0|     1|    1] MHL without charging cable
 386                          * [0x1|     1|     1|    1] MHL with charging cable
 387                          */
 388                         cable_type = ((0x1 << 8)
 389                                         | (vbvolt << 2)
 390                                         | (adclow << 1)
 391                                         | adc1k);
 392
 393                         info->prev_cable_type = adc;
 394                         info->prev_cable_type_gnd = cable_type;
 395                 }
 396
 397                 break;
 398         case MAX77693_CABLE_GROUP_CHG:
 399                 /*
 400                  * Read charger type to check cable type and decide cable state
 401                  * according to type of charger cable.
 402                  */
 403                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 404                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 405
 406                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 407                         *attached = false;
 408
 409                         cable_type = info->prev_chg_type;
 410                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 411                 } else {
 412                         *attached = true;
 413
 414                         /*
 415                          * Check current cable state/cable type and store cable
 416                          * type(info->prev_chg_type) for handling cable when
 417                          * charger cable is detached.
 418                          */
 419                         cable_type = info->prev_chg_type = chg_type;
 420                 }
 421
 422                 break;
 423         case MAX77693_CABLE_GROUP_VBVOLT:
 424                 /*
 425                  * Read ADC value to check cable type and decide cable state
 426                  * according to cable type
 427                  */
 428                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 429                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 430                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 431                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 432
 433                 if (adc == MAX77693_MUIC_ADC_OPEN
 434                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 435                         *attached = false;
 436                 else
 437                         *attached = true;
 438
 439                 /*
 440                  * Read vbvolt field, if vbvolt is 1,
 441                  * this cable is used for charging.
 442                  */
 443                 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 444                 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 445
 446                 cable_type = vbvolt;
 447                 break;
 448         default:
 449                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 450                 cable_type = -EINVAL;
 451                 break;
 452         }
 453
 454         return cable_type;
 455 }
 456
 457 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 458                 int cable_type, bool attached)
 459 {
 460         int ret = 0;
 461         int vbvolt;
 462         bool cable_attached;
 463         unsigned int dock_id;
 464
 465         dev_info(info->dev,
 466                 "external connector is %s (adc:0x%02x)\n",
 467                 attached ? "attached" : "detached", cable_type);
 468
 469         switch (cable_type) {
 470         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 471                 /*
 472                  * Check power cable whether attached or detached state.
 473                  * The Dock-Smart device need surely external power supply.
 474                  * If power cable(USB/TA) isn't connected to Dock device,
 475                  * user can't use Dock-Smart for desktop mode.
 476                  */
 477                 vbvolt = max77693_muic_get_cable_type(info,
 478                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 479                 if (attached && !vbvolt) {
 480                         dev_warn(info->dev,
 481                                 "Cannot detect external power supply\n");
 482                         return 0;
 483                 }
 484
 485                 /*
 486                  * Notify Dock/MHL state.
 487                  * - Dock device include three type of cable which
 488                  * are HDMI, USB for mouse/keyboard and micro-usb port
 489                  * for USB/TA cable. Dock device need always exteranl
 490                  * power supply(USB/TA cable through micro-usb cable). Dock
 491                  * device support screen output of target to separate
 492                  * monitor and mouse/keyboard for desktop mode.
 493                  *
 494                  * Features of 'USB/TA cable with Dock device'
 495                  * - Support MHL
 496                  * - Support external output feature of audio
 497                  * - Support charging through micro-usb port without data
 498                  *           connection if TA cable is connected to target.
 499                  * - Support charging and data connection through micro-usb port
 500                  *           if USB cable is connected between target and host
 501                  *           device.
 502                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 503                  */
 504                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 505                 if (ret < 0)
 506                         return ret;
 507
 508                 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
 509                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 510                 goto out;
 511         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 512                 dock_id = EXTCON_DOCK;
 513                 break;
 514         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 515                 dock_id = EXTCON_DOCK;
 516                 if (!attached) {
 517                         extcon_set_state_sync(info->edev, EXTCON_USB, false);
 518                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 519                                                 false);
 520                 }
 521                 break;
 522         default:
 523                 dev_err(info->dev, "failed to detect %s dock device\n",
 524                         attached ? "attached" : "detached");
 525                 return -EINVAL;
 526         }
 527
 528         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 529         ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 530                                         attached);
 531         if (ret < 0)
 532                 return ret;
 533         extcon_set_state_sync(info->edev, dock_id, attached);
 534
 535 out:
 536         return 0;
 537 }
 538
 539 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 540                 int button_type, bool attached)
 541 {
 542         struct input_dev *dock = info->dock;
 543         unsigned int code;
 544
 545         switch (button_type) {
 546         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 547                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 548                 /* DOCK_KEY_PREV */
 549                 code = KEY_PREVIOUSSONG;
 550                 break;
 551         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 552                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 553                 /* DOCK_KEY_NEXT */
 554                 code = KEY_NEXTSONG;
 555                 break;
 556         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 557                 /* DOCK_VOL_DOWN */
 558                 code = KEY_VOLUMEDOWN;
 559                 break;
 560         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 561                 /* DOCK_VOL_UP */
 562                 code = KEY_VOLUMEUP;
 563                 break;
 564         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 565                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 566                 /* DOCK_KEY_PLAY_PAUSE */
 567                 code = KEY_PLAYPAUSE;
 568                 break;
 569         default:
 570                 dev_err(info->dev,
 571                         "failed to detect %s key (adc:0x%x)\n",
 572                         attached ? "pressed" : "released", button_type);
 573                 return -EINVAL;
 574         }
 575
 576         input_event(dock, EV_KEY, code, attached);
 577         input_sync(dock);
 578
 579         return 0;
 580 }
 581
 582 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 583 {
 584         int cable_type_gnd;
 585         int ret = 0;
 586         bool attached;
 587
 588         cable_type_gnd = max77693_muic_get_cable_type(info,
 589                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 590
 591         switch (cable_type_gnd) {
 592         case MAX77693_MUIC_GND_USB_HOST:
 593         case MAX77693_MUIC_GND_USB_HOST_VB:
 594                 /* USB_HOST, PATH: AP_USB */
 595                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
 596                                                 attached);
 597                 if (ret < 0)
 598                         return ret;
 599                 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 600                 break;
 601         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 602                 /* Audio Video Cable with load, PATH:AUDIO */
 603                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 604                                                 attached);
 605                 if (ret < 0)
 606                         return ret;
 607                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
 608                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 609                                         attached);
 610                 break;
 611         case MAX77693_MUIC_GND_MHL:
 612         case MAX77693_MUIC_GND_MHL_VB:
 613                 /* MHL or MHL with USB/TA cable */
 614                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 615                 break;
 616         default:
 617                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 618                         attached ? "attached" : "detached");
 619                 return -EINVAL;
 620         }
 621
 622         return 0;
 623 }
 624
 625 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 626                 int cable_type, bool attached)
 627 {
 628         int ret = 0;
 629         u8 path = MAX77693_CONTROL1_SW_OPEN;
 630
 631         dev_info(info->dev,
 632                 "external connector is %s (adc:0x%02x)\n",
 633                 attached ? "attached" : "detached", cable_type);
 634
 635         switch (cable_type) {
 636         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 637         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 638                 /* PATH:AP_USB */
 639                 path = MAX77693_CONTROL1_SW_USB;
 640                 break;
 641         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 642         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 643                 /* PATH:AP_UART */
 644                 path = MAX77693_CONTROL1_SW_UART;
 645                 break;
 646         default:
 647                 dev_err(info->dev, "failed to detect %s jig cable\n",
 648                         attached ? "attached" : "detached");
 649                 return -EINVAL;
 650         }
 651
 652         ret = max77693_muic_set_path(info, path, attached);
 653         if (ret < 0)
 654                 return ret;
 655
 656         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
 657
 658         return 0;
 659 }
 660
 661 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 662 {
 663         int cable_type;
 664         int button_type;
 665         bool attached;
 666         int ret = 0;
 667
 668         /* Check accessory state which is either detached or attached */
 669         cable_type = max77693_muic_get_cable_type(info,
 670                                 MAX77693_CABLE_GROUP_ADC, &attached);
 671
 672         dev_info(info->dev,
 673                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 674                 attached ? "attached" : "detached", cable_type,
 675                 info->prev_cable_type);
 676
 677         switch (cable_type) {
 678         case MAX77693_MUIC_ADC_GROUND:
 679                 /* USB_HOST/MHL/Audio */
 680                 max77693_muic_adc_ground_handler(info);
 681                 break;
 682         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 683         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 684         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 685         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 686                 /* JIG */
 687                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 688                 if (ret < 0)
 689                         return ret;
 690                 break;
 691         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 692         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 693         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 694                 /*
 695                  * DOCK device
 696                  *
 697                  * The MAX77693 MUIC device can detect total 34 cable type
 698                  * except of charger cable and MUIC device didn't define
 699                  * specfic role of cable in the range of from 0x01 to 0x12
 700                  * of ADC value. So, can use/define cable with no role according
 701                  * to schema of hardware board.
 702                  */
 703                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 704                 if (ret < 0)
 705                         return ret;
 706                 break;
 707         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 708         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 709         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 710         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 711         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 712                 /*
 713                  * Button of DOCK device
 714                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 715                  *
 716                  * The MAX77693 MUIC device can detect total 34 cable type
 717                  * except of charger cable and MUIC device didn't define
 718                  * specfic role of cable in the range of from 0x01 to 0x12
 719                  * of ADC value. So, can use/define cable with no role according
 720                  * to schema of hardware board.
 721                  */
 722                 if (attached)
 723                         button_type = info->prev_button_type = cable_type;
 724                 else
 725                         button_type = info->prev_button_type;
 726
 727                 ret = max77693_muic_dock_button_handler(info, button_type,
 728                                                         attached);
 729                 if (ret < 0)
 730                         return ret;
 731                 break;
 732         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 733         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 734         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 735         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 736         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 737         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 738         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 739         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 740         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 741         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 742         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 743         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 744         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 745         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 746         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 747         case MAX77693_MUIC_ADC_UART_CABLE:
 748         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 749         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 750                 /*
 751                  * This accessory isn't used in general case if it is specially
 752                  * needed to detect additional accessory, should implement
 753                  * proper operation when this accessory is attached/detached.
 754                  */
 755                 dev_info(info->dev,
 756                         "accessory is %s but it isn't used (adc:0x%x)\n",
 757                         attached ? "attached" : "detached", cable_type);
 758                 return -EAGAIN;
 759         default:
 760                 dev_err(info->dev,
 761                         "failed to detect %s accessory (adc:0x%x)\n",
 762                         attached ? "attached" : "detached", cable_type);
 763                 return -EINVAL;
 764         }
 765
 766         return 0;
 767 }
 768
 769 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 770 {
 771         int chg_type;
 772         int cable_type_gnd;
 773         int cable_type;
 774         bool attached;
 775         bool cable_attached;
 776         int ret = 0;
 777
 778         chg_type = max77693_muic_get_cable_type(info,
 779                                 MAX77693_CABLE_GROUP_CHG, &attached);
 780
 781         dev_info(info->dev,
 782                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 783                         attached ? "attached" : "detached",
 784                         chg_type, info->prev_chg_type);
 785
 786         switch (chg_type) {
 787         case MAX77693_CHARGER_TYPE_USB:
 788         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 789         case MAX77693_CHARGER_TYPE_NONE:
 790                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 791                 cable_type_gnd = max77693_muic_get_cable_type(info,
 792                                         MAX77693_CABLE_GROUP_ADC_GND,
 793                                         &cable_attached);
 794                 switch (cable_type_gnd) {
 795                 case MAX77693_MUIC_GND_MHL:
 796                 case MAX77693_MUIC_GND_MHL_VB:
 797                         /*
 798                          * MHL cable with USB/TA cable
 799                          * - MHL cable include two port(HDMI line and separate
 800                          * micro-usb port. When the target connect MHL cable,
 801                          * extcon driver check whether USB/TA cable is
 802                          * connected. If USB/TA cable is connected, extcon
 803                          * driver notify state to notifiee for charging battery.
 804                          *
 805                          * Features of 'USB/TA with MHL cable'
 806                          * - Support MHL
 807                          * - Support charging through micro-usb port without
 808                          *   data connection
 809                          */
 810                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 811                                                 attached);
 812                         if (!cable_attached)
 813                                 extcon_set_state_sync(info->edev,
 814                                         EXTCON_DISP_MHL, cable_attached);
 815                         break;
 816                 }
 817
 818                 /* Check MAX77693_CABLE_GROUP_ADC type */
 819                 cable_type = max77693_muic_get_cable_type(info,
 820                                         MAX77693_CABLE_GROUP_ADC,
 821                                         &cable_attached);
 822                 switch (cable_type) {
 823                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 824                         /*
 825                          * Dock-Audio device with USB/TA cable
 826                          * - Dock device include two port(Dock-Audio and micro-
 827                          * usb port). When the target connect Dock-Audio device,
 828                          * extcon driver check whether USB/TA cable is connected
 829                          * or not. If USB/TA cable is connected, extcon driver
 830                          * notify state to notifiee for charging battery.
 831                          *
 832                          * Features of 'USB/TA cable with Dock-Audio device'
 833                          * - Support external output feature of audio.
 834                          * - Support charging through micro-usb port without
 835                          *   data connection.
 836                          */
 837                         extcon_set_state_sync(info->edev, EXTCON_USB,
 838                                                 attached);
 839                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 840                                                 attached);
 841
 842                         if (!cable_attached)
 843                                 extcon_set_state_sync(info->edev, EXTCON_DOCK,
 844                                                         cable_attached);
 845                         break;
 846                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 847                         /*
 848                          * Dock-Smart device with USB/TA cable
 849                          * - Dock-Desk device include three type of cable which
 850                          * are HDMI, USB for mouse/keyboard and micro-usb port
 851                          * for USB/TA cable. Dock-Smart device need always
 852                          * exteranl power supply(USB/TA cable through micro-usb
 853                          * cable). Dock-Smart device support screen output of
 854                          * target to separate monitor and mouse/keyboard for
 855                          * desktop mode.
 856                          *
 857                          * Features of 'USB/TA cable with Dock-Smart device'
 858                          * - Support MHL
 859                          * - Support external output feature of audio
 860                          * - Support charging through micro-usb port without
 861                          *   data connection if TA cable is connected to target.
 862                          * - Support charging and data connection through micro-
 863                          *   usb port if USB cable is connected between target
 864                          *   and host device
 865                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 866                          */
 867                         ret = max77693_muic_set_path(info, info->path_usb,
 868                                                     attached);
 869                         if (ret < 0)
 870                                 return ret;
 871
 872                         extcon_set_state_sync(info->edev, EXTCON_DOCK,
 873                                                 attached);
 874                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 875                                                 attached);
 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_state_sync(info->edev, EXTCON_USB,
 909                                                 attached);
 910                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 911                                                 attached);
 912                         break;
 913                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 914                         /* Only TA cable */
 915                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 916                                                 attached);
 917                         break;
 918                 }
 919                 break;
 920         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 921                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
 922                                         attached);
 923                 break;
 924         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 925                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
 926                                         attached);
 927                 break;
 928         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 929                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
 930                                         attached);
 931                 break;
 932         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 933                 break;
 934         default:
 935                 dev_err(info->dev,
 936                         "failed to detect %s accessory (chg_type:0x%x)\n",
 937                         attached ? "attached" : "detached", chg_type);
 938                 return -EINVAL;
 939         }
 940
 941         return 0;
 942 }
 943
 944 static void max77693_muic_irq_work(struct work_struct *work)
 945 {
 946         struct max77693_muic_info *info = container_of(work,
 947                         struct max77693_muic_info, irq_work);
 948         int irq_type = -1;
 949         int i, ret = 0;
 950
 951         if (!info->edev)
 952                 return;
 953
 954         mutex_lock(&info->mutex);
 955
 956         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 957                 if (info->irq == muic_irqs[i].virq)
 958                         irq_type = muic_irqs[i].irq;
 959
 960         ret = regmap_bulk_read(info->max77693->regmap_muic,
 961                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 962         if (ret) {
 963                 dev_err(info->dev, "failed to read MUIC register\n");
 964                 mutex_unlock(&info->mutex);
 965                 return;
 966         }
 967
 968         switch (irq_type) {
 969         case MAX77693_MUIC_IRQ_INT1_ADC:
 970         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 971         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 972         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 973                 /* Handle all of accessory except for
 974                    type of charger accessory */
 975                 ret = max77693_muic_adc_handler(info);
 976                 break;
 977         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 978         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 979         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 980         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 981         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 982         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 983                 /* Handle charger accessory */
 984                 ret = max77693_muic_chg_handler(info);
 985                 break;
 986         case MAX77693_MUIC_IRQ_INT3_EOC:
 987         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 988         case MAX77693_MUIC_IRQ_INT3_OVP:
 989         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 990         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 991         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 992                 break;
 993         default:
 994                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 995                                 irq_type);
 996                 mutex_unlock(&info->mutex);
 997                 return;
 998         }
 999
1000         if (ret < 0)
1001                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1002
1003         mutex_unlock(&info->mutex);
1004 }
1005
1006 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1007 {
1008         struct max77693_muic_info *info = data;
1009
1010         info->irq = irq;
1011         schedule_work(&info->irq_work);
1012
1013         return IRQ_HANDLED;
1014 }
1015
1016 static const struct regmap_config max77693_muic_regmap_config = {
1017         .reg_bits = 8,
1018         .val_bits = 8,
1019 };
1020
1021 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1022 {
1023         int ret = 0;
1024         int adc;
1025         int chg_type;
1026         bool attached;
1027
1028         mutex_lock(&info->mutex);
1029
1030         /* Read STATUSx register to detect accessory */
1031         ret = regmap_bulk_read(info->max77693->regmap_muic,
1032                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1033         if (ret) {
1034                 dev_err(info->dev, "failed to read MUIC register\n");
1035                 mutex_unlock(&info->mutex);
1036                 return ret;
1037         }
1038
1039         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1040                                         &attached);
1041         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1042                 ret = max77693_muic_adc_handler(info);
1043                 if (ret < 0) {
1044                         dev_err(info->dev, "Cannot detect accessory\n");
1045                         mutex_unlock(&info->mutex);
1046                         return ret;
1047                 }
1048         }
1049
1050         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1051                                         &attached);
1052         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1053                 ret = max77693_muic_chg_handler(info);
1054                 if (ret < 0) {
1055                         dev_err(info->dev, "Cannot detect charger accessory\n");
1056                         mutex_unlock(&info->mutex);
1057                         return ret;
1058                 }
1059         }
1060
1061         mutex_unlock(&info->mutex);
1062
1063         return 0;
1064 }
1065
1066 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1067 {
1068         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1069                                 struct max77693_muic_info, wq_detcable);
1070
1071         max77693_muic_detect_accessory(info);
1072 }
1073
1074 static int max77693_muic_probe(struct platform_device *pdev)
1075 {
1076         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1077         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1078         struct max77693_muic_info *info;
1079         struct max77693_reg_data *init_data;
1080         int num_init_data;
1081         int delay_jiffies;
1082         int ret;
1083         int i;
1084         unsigned int id;
1085
1086         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1087                                    GFP_KERNEL);
1088         if (!info)
1089                 return -ENOMEM;
1090
1091         info->dev = &pdev->dev;
1092         info->max77693 = max77693;
1093         if (info->max77693->regmap_muic) {
1094                 dev_dbg(&pdev->dev, "allocate register map\n");
1095         } else {
1096                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1097                                                 info->max77693->i2c_muic,
1098                                                 &max77693_muic_regmap_config);
1099                 if (IS_ERR(info->max77693->regmap_muic)) {
1100                         ret = PTR_ERR(info->max77693->regmap_muic);
1101                         dev_err(max77693->dev,
1102                                 "failed to allocate register map: %d\n", ret);
1103                         return ret;
1104                 }
1105         }
1106
1107         /* Register input device for button of dock device */
1108         info->dock = devm_input_allocate_device(&pdev->dev);
1109         if (!info->dock) {
1110                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1111                 return -ENOMEM;
1112         }
1113         info->dock->name = "max77693-muic/dock";
1114         info->dock->phys = "max77693-muic/extcon";
1115         info->dock->dev.parent = &pdev->dev;
1116
1117         __set_bit(EV_REP, info->dock->evbit);
1118
1119         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1120         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1121         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1122         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1123         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1124
1125         ret = input_register_device(info->dock);
1126         if (ret < 0) {
1127                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1128                                 ret);
1129                 return ret;
1130         }
1131
1132         platform_set_drvdata(pdev, info);
1133         mutex_init(&info->mutex);
1134
1135         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1136
1137         /* Support irq domain for MAX77693 MUIC device */
1138         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1139                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1140                 int virq;
1141
1142                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1143                                         muic_irq->irq);
1144                 if (virq <= 0)
1145                         return -EINVAL;
1146                 muic_irq->virq = virq;
1147
1148                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1149                                 max77693_muic_irq_handler,
1150                                 IRQF_NO_SUSPEND,
1151                                 muic_irq->name, info);
1152                 if (ret) {
1153                         dev_err(&pdev->dev,
1154                                 "failed: irq request (IRQ: %d, error :%d)\n",
1155                                 muic_irq->irq, ret);
1156                         return ret;
1157                 }
1158         }
1159
1160         /* Initialize extcon device */
1161         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1162                                               max77693_extcon_cable);
1163         if (IS_ERR(info->edev)) {
1164                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1165                 return -ENOMEM;
1166         }
1167
1168         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1169         if (ret) {
1170                 dev_err(&pdev->dev, "failed to register extcon device\n");
1171                 return ret;
1172         }
1173
1174         /* Initialize MUIC register by using platform data or default data */
1175         if (pdata && pdata->muic_data) {
1176                 init_data = pdata->muic_data->init_data;
1177                 num_init_data = pdata->muic_data->num_init_data;
1178         } else {
1179                 init_data = default_init_data;
1180                 num_init_data = ARRAY_SIZE(default_init_data);
1181         }
1182
1183         for (i = 0; i < num_init_data; i++) {
1184                 regmap_write(info->max77693->regmap_muic,
1185                                 init_data[i].addr,
1186                                 init_data[i].data);
1187         }
1188
1189         if (pdata && pdata->muic_data) {
1190                 struct max77693_muic_platform_data *muic_pdata
1191                                                    = pdata->muic_data;
1192
1193                 /*
1194                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1195                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1196                  */
1197                 if (muic_pdata->path_uart)
1198                         info->path_uart = muic_pdata->path_uart;
1199                 else
1200                         info->path_uart = MAX77693_CONTROL1_SW_UART;
1201
1202                 if (muic_pdata->path_usb)
1203                         info->path_usb = muic_pdata->path_usb;
1204                 else
1205                         info->path_usb = MAX77693_CONTROL1_SW_USB;
1206
1207                 /*
1208                  * Default delay time for detecting cable state
1209                  * after certain time.
1210                  */
1211                 if (muic_pdata->detcable_delay_ms)
1212                         delay_jiffies =
1213                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1214                 else
1215                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1216         } else {
1217                 info->path_usb = MAX77693_CONTROL1_SW_USB;
1218                 info->path_uart = MAX77693_CONTROL1_SW_UART;
1219                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1220         }
1221
1222         /* Set initial path for UART */
1223          max77693_muic_set_path(info, info->path_uart, true);
1224
1225         /* Check revision number of MUIC device*/
1226         ret = regmap_read(info->max77693->regmap_muic,
1227                         MAX77693_MUIC_REG_ID, &id);
1228         if (ret < 0) {
1229                 dev_err(&pdev->dev, "failed to read revision number\n");
1230                 return ret;
1231         }
1232         dev_info(info->dev, "device ID : 0x%x\n", id);
1233
1234         /* Set ADC debounce time */
1235         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1236
1237         /*
1238          * Detect accessory after completing the initialization of platform
1239          *
1240          * - Use delayed workqueue to detect cable state and then
1241          * notify cable state to notifiee/platform through uevent.
1242          * After completing the booting of platform, the extcon provider
1243          * driver should notify cable state to upper layer.
1244          */
1245         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1246         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1247                         delay_jiffies);
1248
1249         return ret;
1250 }
1251
1252 static int max77693_muic_remove(struct platform_device *pdev)
1253 {
1254         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1255
1256         cancel_work_sync(&info->irq_work);
1257         input_unregister_device(info->dock);
1258
1259         return 0;
1260 }
1261
1262 static struct platform_driver max77693_muic_driver = {
1263         .driver         = {
1264                 .name   = DEV_NAME,
1265         },
1266         .probe          = max77693_muic_probe,
1267         .remove         = max77693_muic_remove,
1268 };
1269
1270 module_platform_driver(max77693_muic_driver);
1271
1272 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1273 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1274 MODULE_LICENSE("GPL");
1275 MODULE_ALIAS("platform:extcon-max77693");