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 <[email protected]>
   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_TA,
 208         EXTCON_FAST_CHARGER,
 209         EXTCON_SLOW_CHARGER,
 210         EXTCON_CHARGE_DOWNSTREAM,
 211         EXTCON_MHL,
 212         EXTCON_JIG,
 213         EXTCON_DOCK,
 214         EXTCON_NONE,
 215 };
 216
 217 /*
 218  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 219  * @info: the instance including private data of max77693 MUIC
 220  * @time: the debounce time of ADC
 221  */
 222 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 223                 enum max77693_muic_adc_debounce_time time)
 224 {
 225         int ret;
 226
 227         switch (time) {
 228         case ADC_DEBOUNCE_TIME_5MS:
 229         case ADC_DEBOUNCE_TIME_10MS:
 230         case ADC_DEBOUNCE_TIME_25MS:
 231         case ADC_DEBOUNCE_TIME_38_62MS:
 232                 /*
 233                  * Don't touch BTLDset, JIGset when you want to change adc
 234                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 235                  * muic device will be reset and loose current state.
 236                  */
 237                 ret = regmap_write(info->max77693->regmap_muic,
 238                                   MAX77693_MUIC_REG_CTRL3,
 239                                   time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
 240                 if (ret) {
 241                         dev_err(info->dev, "failed to set ADC debounce time\n");
 242                         return ret;
 243                 }
 244                 break;
 245         default:
 246                 dev_err(info->dev, "invalid ADC debounce time\n");
 247                 return -EINVAL;
 248         }
 249
 250         return 0;
 251 };
 252
 253 /*
 254  * max77693_muic_set_path - Set hardware line according to attached cable
 255  * @info: the instance including private data of max77693 MUIC
 256  * @value: the path according to attached cable
 257  * @attached: the state of cable (true:attached, false:detached)
 258  *
 259  * The max77693 MUIC device share outside H/W line among a varity of cables
 260  * so, this function set internal path of H/W line according to the type of
 261  * attached cable.
 262  */
 263 static int max77693_muic_set_path(struct max77693_muic_info *info,
 264                 u8 val, bool attached)
 265 {
 266         int ret = 0;
 267         unsigned int ctrl1, ctrl2 = 0;
 268
 269         if (attached)
 270                 ctrl1 = val;
 271         else
 272                 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
 273
 274         ret = regmap_update_bits(info->max77693->regmap_muic,
 275                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 276         if (ret < 0) {
 277                 dev_err(info->dev, "failed to update MUIC register\n");
 278                 return ret;
 279         }
 280
 281         if (attached)
 282                 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;   /* LowPwr=0, CPEn=1 */
 283         else
 284                 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
 285
 286         ret = regmap_update_bits(info->max77693->regmap_muic,
 287                         MAX77693_MUIC_REG_CTRL2,
 288                         MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
 289                         ctrl2);
 290         if (ret < 0) {
 291                 dev_err(info->dev, "failed to update MUIC register\n");
 292                 return ret;
 293         }
 294
 295         dev_info(info->dev,
 296                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 297                 ctrl1, ctrl2, attached ? "attached" : "detached");
 298
 299         return 0;
 300 }
 301
 302 /*
 303  * max77693_muic_get_cable_type - Return cable type and check cable state
 304  * @info: the instance including private data of max77693 MUIC
 305  * @group: the path according to attached cable
 306  * @attached: store cable state and return
 307  *
 308  * This function check the cable state either attached or detached,
 309  * and then divide precise type of cable according to cable group.
 310  *      - MAX77693_CABLE_GROUP_ADC
 311  *      - MAX77693_CABLE_GROUP_ADC_GND
 312  *      - MAX77693_CABLE_GROUP_CHG
 313  *      - MAX77693_CABLE_GROUP_VBVOLT
 314  */
 315 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 316                 enum max77693_muic_cable_group group, bool *attached)
 317 {
 318         int cable_type = 0;
 319         int adc;
 320         int adc1k;
 321         int adclow;
 322         int vbvolt;
 323         int chg_type;
 324
 325         switch (group) {
 326         case MAX77693_CABLE_GROUP_ADC:
 327                 /*
 328                  * Read ADC value to check cable type and decide cable state
 329                  * according to cable type
 330                  */
 331                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 332                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 333
 334                 /*
 335                  * Check current cable state/cable type and store cable type
 336                  * (info->prev_cable_type) for handling cable when cable is
 337                  * detached.
 338                  */
 339                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 340                         *attached = false;
 341
 342                         cable_type = info->prev_cable_type;
 343                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 344                 } else {
 345                         *attached = true;
 346
 347                         cable_type = info->prev_cable_type = adc;
 348                 }
 349                 break;
 350         case MAX77693_CABLE_GROUP_ADC_GND:
 351                 /*
 352                  * Read ADC value to check cable type and decide cable state
 353                  * according to cable type
 354                  */
 355                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 356                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 357
 358                 /*
 359                  * Check current cable state/cable type and store cable type
 360                  * (info->prev_cable_type/_gnd) for handling cable when cable
 361                  * is detached.
 362                  */
 363                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 364                         *attached = false;
 365
 366                         cable_type = info->prev_cable_type_gnd;
 367                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 368                 } else {
 369                         *attached = true;
 370
 371                         adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
 372                         adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
 373                         adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
 374                         adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
 375
 376                         vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 377                         vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 378
 379                         /**
 380                          * [0x1|VBVolt|ADCLow|ADC1K]
 381                          * [0x1|     0|     0|    0] USB_HOST
 382                          * [0x1|     1|     0|    0] USB_HSOT_VB
 383                          * [0x1|     0|     1|    0] Audio Video cable with load
 384                          * [0x1|     0|     1|    1] MHL without charging cable
 385                          * [0x1|     1|     1|    1] MHL with charging cable
 386                          */
 387                         cable_type = ((0x1 << 8)
 388                                         | (vbvolt << 2)
 389                                         | (adclow << 1)
 390                                         | adc1k);
 391
 392                         info->prev_cable_type = adc;
 393                         info->prev_cable_type_gnd = cable_type;
 394                 }
 395
 396                 break;
 397         case MAX77693_CABLE_GROUP_CHG:
 398                 /*
 399                  * Read charger type to check cable type and decide cable state
 400                  * according to type of charger cable.
 401                  */
 402                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 403                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 404
 405                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 406                         *attached = false;
 407
 408                         cable_type = info->prev_chg_type;
 409                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 410                 } else {
 411                         *attached = true;
 412
 413                         /*
 414                          * Check current cable state/cable type and store cable
 415                          * type(info->prev_chg_type) for handling cable when
 416                          * charger cable is detached.
 417                          */
 418                         cable_type = info->prev_chg_type = chg_type;
 419                 }
 420
 421                 break;
 422         case MAX77693_CABLE_GROUP_VBVOLT:
 423                 /*
 424                  * Read ADC value to check cable type and decide cable state
 425                  * according to cable type
 426                  */
 427                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 428                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 429                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 430                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 431
 432                 if (adc == MAX77693_MUIC_ADC_OPEN
 433                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 434                         *attached = false;
 435                 else
 436                         *attached = true;
 437
 438                 /*
 439                  * Read vbvolt field, if vbvolt is 1,
 440                  * this cable is used for charging.
 441                  */
 442                 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 443                 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 444
 445                 cable_type = vbvolt;
 446                 break;
 447         default:
 448                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 449                 cable_type = -EINVAL;
 450                 break;
 451         }
 452
 453         return cable_type;
 454 }
 455
 456 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 457                 int cable_type, bool attached)
 458 {
 459         int ret = 0;
 460         int vbvolt;
 461         bool cable_attached;
 462         unsigned int dock_id;
 463
 464         dev_info(info->dev,
 465                 "external connector is %s (adc:0x%02x)\n",
 466                 attached ? "attached" : "detached", cable_type);
 467
 468         switch (cable_type) {
 469         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 470                 /*
 471                  * Check power cable whether attached or detached state.
 472                  * The Dock-Smart device need surely external power supply.
 473                  * If power cable(USB/TA) isn't connected to Dock device,
 474                  * user can't use Dock-Smart for desktop mode.
 475                  */
 476                 vbvolt = max77693_muic_get_cable_type(info,
 477                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 478                 if (attached && !vbvolt) {
 479                         dev_warn(info->dev,
 480                                 "Cannot detect external power supply\n");
 481                         return 0;
 482                 }
 483
 484                 /*
 485                  * Notify Dock/MHL state.
 486                  * - Dock device include three type of cable which
 487                  * are HDMI, USB for mouse/keyboard and micro-usb port
 488                  * for USB/TA cable. Dock device need always exteranl
 489                  * power supply(USB/TA cable through micro-usb cable). Dock
 490                  * device support screen output of target to separate
 491                  * monitor and mouse/keyboard for desktop mode.
 492                  *
 493                  * Features of 'USB/TA cable with Dock device'
 494                  * - Support MHL
 495                  * - Support external output feature of audio
 496                  * - Support charging through micro-usb port without data
 497                  *           connection if TA cable is connected to target.
 498                  * - Support charging and data connection through micro-usb port
 499                  *           if USB cable is connected between target and host
 500                  *           device.
 501                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 502                  */
 503                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 504                 if (ret < 0)
 505                         return ret;
 506
 507                 extcon_set_cable_state_(info->edev, EXTCON_DOCK, attached);
 508                 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
 509                 goto out;
 510         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 511                 dock_id = EXTCON_DOCK;
 512                 break;
 513         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 514                 dock_id = EXTCON_DOCK;
 515                 if (!attached)
 516                         extcon_set_cable_state_(info->edev, EXTCON_USB, false);
 517                 break;
 518         default:
 519                 dev_err(info->dev, "failed to detect %s dock device\n",
 520                         attached ? "attached" : "detached");
 521                 return -EINVAL;
 522         }
 523
 524         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 525         ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 526                                         attached);
 527         if (ret < 0)
 528                 return ret;
 529         extcon_set_cable_state_(info->edev, dock_id, attached);
 530
 531 out:
 532         return 0;
 533 }
 534
 535 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 536                 int button_type, bool attached)
 537 {
 538         struct input_dev *dock = info->dock;
 539         unsigned int code;
 540
 541         switch (button_type) {
 542         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 543                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 544                 /* DOCK_KEY_PREV */
 545                 code = KEY_PREVIOUSSONG;
 546                 break;
 547         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 548                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 549                 /* DOCK_KEY_NEXT */
 550                 code = KEY_NEXTSONG;
 551                 break;
 552         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 553                 /* DOCK_VOL_DOWN */
 554                 code = KEY_VOLUMEDOWN;
 555                 break;
 556         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 557                 /* DOCK_VOL_UP */
 558                 code = KEY_VOLUMEUP;
 559                 break;
 560         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 561                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 562                 /* DOCK_KEY_PLAY_PAUSE */
 563                 code = KEY_PLAYPAUSE;
 564                 break;
 565         default:
 566                 dev_err(info->dev,
 567                         "failed to detect %s key (adc:0x%x)\n",
 568                         attached ? "pressed" : "released", button_type);
 569                 return -EINVAL;
 570         }
 571
 572         input_event(dock, EV_KEY, code, attached);
 573         input_sync(dock);
 574
 575         return 0;
 576 }
 577
 578 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 579 {
 580         int cable_type_gnd;
 581         int ret = 0;
 582         bool attached;
 583
 584         cable_type_gnd = max77693_muic_get_cable_type(info,
 585                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 586
 587         switch (cable_type_gnd) {
 588         case MAX77693_MUIC_GND_USB_HOST:
 589         case MAX77693_MUIC_GND_USB_HOST_VB:
 590                 /* USB_HOST, PATH: AP_USB */
 591                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
 592                                                 attached);
 593                 if (ret < 0)
 594                         return ret;
 595                 extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
 596                 break;
 597         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 598                 /* Audio Video Cable with load, PATH:AUDIO */
 599                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 600                                                 attached);
 601                 if (ret < 0)
 602                         return ret;
 603                 extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
 604                 break;
 605         case MAX77693_MUIC_GND_MHL:
 606         case MAX77693_MUIC_GND_MHL_VB:
 607                 /* MHL or MHL with USB/TA cable */
 608                 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
 609                 break;
 610         default:
 611                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 612                         attached ? "attached" : "detached");
 613                 return -EINVAL;
 614         }
 615
 616         return 0;
 617 }
 618
 619 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 620                 int cable_type, bool attached)
 621 {
 622         int ret = 0;
 623         u8 path = MAX77693_CONTROL1_SW_OPEN;
 624
 625         dev_info(info->dev,
 626                 "external connector is %s (adc:0x%02x)\n",
 627                 attached ? "attached" : "detached", cable_type);
 628
 629         switch (cable_type) {
 630         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 631         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 632                 /* PATH:AP_USB */
 633                 path = MAX77693_CONTROL1_SW_USB;
 634                 break;
 635         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 636         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 637                 /* PATH:AP_UART */
 638                 path = MAX77693_CONTROL1_SW_UART;
 639                 break;
 640         default:
 641                 dev_err(info->dev, "failed to detect %s jig cable\n",
 642                         attached ? "attached" : "detached");
 643                 return -EINVAL;
 644         }
 645
 646         ret = max77693_muic_set_path(info, path, attached);
 647         if (ret < 0)
 648                 return ret;
 649
 650         extcon_set_cable_state_(info->edev, EXTCON_JIG, attached);
 651
 652         return 0;
 653 }
 654
 655 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 656 {
 657         int cable_type;
 658         int button_type;
 659         bool attached;
 660         int ret = 0;
 661
 662         /* Check accessory state which is either detached or attached */
 663         cable_type = max77693_muic_get_cable_type(info,
 664                                 MAX77693_CABLE_GROUP_ADC, &attached);
 665
 666         dev_info(info->dev,
 667                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 668                 attached ? "attached" : "detached", cable_type,
 669                 info->prev_cable_type);
 670
 671         switch (cable_type) {
 672         case MAX77693_MUIC_ADC_GROUND:
 673                 /* USB_HOST/MHL/Audio */
 674                 max77693_muic_adc_ground_handler(info);
 675                 break;
 676         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 677         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 678         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 679         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 680                 /* JIG */
 681                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 682                 if (ret < 0)
 683                         return ret;
 684                 break;
 685         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 686         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 687         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 688                 /*
 689                  * DOCK device
 690                  *
 691                  * The MAX77693 MUIC device can detect total 34 cable type
 692                  * except of charger cable and MUIC device didn't define
 693                  * specfic role of cable in the range of from 0x01 to 0x12
 694                  * of ADC value. So, can use/define cable with no role according
 695                  * to schema of hardware board.
 696                  */
 697                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 698                 if (ret < 0)
 699                         return ret;
 700                 break;
 701         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 702         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 703         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 704         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 705         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 706                 /*
 707                  * Button of DOCK device
 708                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 709                  *
 710                  * The MAX77693 MUIC device can detect total 34 cable type
 711                  * except of charger cable and MUIC device didn't define
 712                  * specfic role of cable in the range of from 0x01 to 0x12
 713                  * of ADC value. So, can use/define cable with no role according
 714                  * to schema of hardware board.
 715                  */
 716                 if (attached)
 717                         button_type = info->prev_button_type = cable_type;
 718                 else
 719                         button_type = info->prev_button_type;
 720
 721                 ret = max77693_muic_dock_button_handler(info, button_type,
 722                                                         attached);
 723                 if (ret < 0)
 724                         return ret;
 725                 break;
 726         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 727         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 728         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 729         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 730         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 731         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 732         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 733         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 734         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 735         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 736         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 737         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 738         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 739         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 740         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 741         case MAX77693_MUIC_ADC_UART_CABLE:
 742         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 743         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 744                 /*
 745                  * This accessory isn't used in general case if it is specially
 746                  * needed to detect additional accessory, should implement
 747                  * proper operation when this accessory is attached/detached.
 748                  */
 749                 dev_info(info->dev,
 750                         "accessory is %s but it isn't used (adc:0x%x)\n",
 751                         attached ? "attached" : "detached", cable_type);
 752                 return -EAGAIN;
 753         default:
 754                 dev_err(info->dev,
 755                         "failed to detect %s accessory (adc:0x%x)\n",
 756                         attached ? "attached" : "detached", cable_type);
 757                 return -EINVAL;
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 764 {
 765         int chg_type;
 766         int cable_type_gnd;
 767         int cable_type;
 768         bool attached;
 769         bool cable_attached;
 770         int ret = 0;
 771
 772         chg_type = max77693_muic_get_cable_type(info,
 773                                 MAX77693_CABLE_GROUP_CHG, &attached);
 774
 775         dev_info(info->dev,
 776                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 777                         attached ? "attached" : "detached",
 778                         chg_type, info->prev_chg_type);
 779
 780         switch (chg_type) {
 781         case MAX77693_CHARGER_TYPE_USB:
 782         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 783         case MAX77693_CHARGER_TYPE_NONE:
 784                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 785                 cable_type_gnd = max77693_muic_get_cable_type(info,
 786                                         MAX77693_CABLE_GROUP_ADC_GND,
 787                                         &cable_attached);
 788                 switch (cable_type_gnd) {
 789                 case MAX77693_MUIC_GND_MHL:
 790                 case MAX77693_MUIC_GND_MHL_VB:
 791                         /*
 792                          * MHL cable with USB/TA cable
 793                          * - MHL cable include two port(HDMI line and separate
 794                          * micro-usb port. When the target connect MHL cable,
 795                          * extcon driver check whether USB/TA cable is
 796                          * connected. If USB/TA cable is connected, extcon
 797                          * driver notify state to notifiee for charging battery.
 798                          *
 799                          * Features of 'USB/TA with MHL cable'
 800                          * - Support MHL
 801                          * - Support charging through micro-usb port without
 802                          *   data connection
 803                          */
 804                         extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
 805                         if (!cable_attached)
 806                                 extcon_set_cable_state_(info->edev, EXTCON_MHL,
 807                                                         cable_attached);
 808                         break;
 809                 }
 810
 811                 /* Check MAX77693_CABLE_GROUP_ADC type */
 812                 cable_type = max77693_muic_get_cable_type(info,
 813                                         MAX77693_CABLE_GROUP_ADC,
 814                                         &cable_attached);
 815                 switch (cable_type) {
 816                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 817                         /*
 818                          * Dock-Audio device with USB/TA cable
 819                          * - Dock device include two port(Dock-Audio and micro-
 820                          * usb port). When the target connect Dock-Audio device,
 821                          * extcon driver check whether USB/TA cable is connected
 822                          * or not. If USB/TA cable is connected, extcon driver
 823                          * notify state to notifiee for charging battery.
 824                          *
 825                          * Features of 'USB/TA cable with Dock-Audio device'
 826                          * - Support external output feature of audio.
 827                          * - Support charging through micro-usb port without
 828                          *   data connection.
 829                          */
 830                         extcon_set_cable_state_(info->edev, EXTCON_USB,
 831                                                 attached);
 832
 833                         if (!cable_attached)
 834                                 extcon_set_cable_state_(info->edev, EXTCON_DOCK,
 835                                                         cable_attached);
 836                         break;
 837                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 838                         /*
 839                          * Dock-Smart device with USB/TA cable
 840                          * - Dock-Desk device include three type of cable which
 841                          * are HDMI, USB for mouse/keyboard and micro-usb port
 842                          * for USB/TA cable. Dock-Smart device need always
 843                          * exteranl power supply(USB/TA cable through micro-usb
 844                          * cable). Dock-Smart device support screen output of
 845                          * target to separate monitor and mouse/keyboard for
 846                          * desktop mode.
 847                          *
 848                          * Features of 'USB/TA cable with Dock-Smart device'
 849                          * - Support MHL
 850                          * - Support external output feature of audio
 851                          * - Support charging through micro-usb port without
 852                          *   data connection if TA cable is connected to target.
 853                          * - Support charging and data connection through micro-
 854                          *   usb port if USB cable is connected between target
 855                          *   and host device
 856                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 857                          */
 858                         ret = max77693_muic_set_path(info, info->path_usb,
 859                                                     attached);
 860                         if (ret < 0)
 861                                 return ret;
 862
 863                         extcon_set_cable_state_(info->edev, EXTCON_DOCK,
 864                                                 attached);
 865                         extcon_set_cable_state_(info->edev, EXTCON_MHL,
 866                                                 attached);
 867                         break;
 868                 }
 869
 870                 /* Check MAX77693_CABLE_GROUP_CHG type */
 871                 switch (chg_type) {
 872                 case MAX77693_CHARGER_TYPE_NONE:
 873                         /*
 874                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 875                          * cable is attached, muic device happen below two irq.
 876                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 877                          *    MHL/Dock-Audio.
 878                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 879                          *    USB/TA cable connected to MHL or Dock-Audio.
 880                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 881                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 882                          *
 883                          * If user attach MHL (with USB/TA cable and immediately
 884                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 885                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 886                          * connected state to target. But USB/TA cable isn't
 887                          * connected to target. The user be face with unusual
 888                          * action. So, driver should check this situation in
 889                          * spite of, that previous charger type is N/A.
 890                          */
 891                         break;
 892                 case MAX77693_CHARGER_TYPE_USB:
 893                         /* Only USB cable, PATH:AP_USB */
 894                         ret = max77693_muic_set_path(info, info->path_usb,
 895                                                     attached);
 896                         if (ret < 0)
 897                                 return ret;
 898
 899                         extcon_set_cable_state_(info->edev, EXTCON_USB,
 900                                                 attached);
 901                         break;
 902                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 903                         /* Only TA cable */
 904                         extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
 905                         break;
 906                 }
 907                 break;
 908         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 909                 extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM,
 910                                         attached);
 911                 break;
 912         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 913                 extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER,
 914                                         attached);
 915                 break;
 916         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 917                 extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER,
 918                                         attached);
 919                 break;
 920         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 921                 break;
 922         default:
 923                 dev_err(info->dev,
 924                         "failed to detect %s accessory (chg_type:0x%x)\n",
 925                         attached ? "attached" : "detached", chg_type);
 926                 return -EINVAL;
 927         }
 928
 929         return 0;
 930 }
 931
 932 static void max77693_muic_irq_work(struct work_struct *work)
 933 {
 934         struct max77693_muic_info *info = container_of(work,
 935                         struct max77693_muic_info, irq_work);
 936         int irq_type = -1;
 937         int i, ret = 0;
 938
 939         if (!info->edev)
 940                 return;
 941
 942         mutex_lock(&info->mutex);
 943
 944         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 945                 if (info->irq == muic_irqs[i].virq)
 946                         irq_type = muic_irqs[i].irq;
 947
 948         ret = regmap_bulk_read(info->max77693->regmap_muic,
 949                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 950         if (ret) {
 951                 dev_err(info->dev, "failed to read MUIC register\n");
 952                 mutex_unlock(&info->mutex);
 953                 return;
 954         }
 955
 956         switch (irq_type) {
 957         case MAX77693_MUIC_IRQ_INT1_ADC:
 958         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 959         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 960         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 961                 /* Handle all of accessory except for
 962                    type of charger accessory */
 963                 ret = max77693_muic_adc_handler(info);
 964                 break;
 965         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 966         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 967         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 968         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 969         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 970         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 971                 /* Handle charger accessory */
 972                 ret = max77693_muic_chg_handler(info);
 973                 break;
 974         case MAX77693_MUIC_IRQ_INT3_EOC:
 975         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 976         case MAX77693_MUIC_IRQ_INT3_OVP:
 977         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 978         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 979         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 980                 break;
 981         default:
 982                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 983                                 irq_type);
 984                 mutex_unlock(&info->mutex);
 985                 return;
 986         }
 987
 988         if (ret < 0)
 989                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 990
 991         mutex_unlock(&info->mutex);
 992 }
 993
 994 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
 995 {
 996         struct max77693_muic_info *info = data;
 997
 998         info->irq = irq;
 999         schedule_work(&info->irq_work);
1000
1001         return IRQ_HANDLED;
1002 }
1003
1004 static const struct regmap_config max77693_muic_regmap_config = {
1005         .reg_bits = 8,
1006         .val_bits = 8,
1007 };
1008
1009 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1010 {
1011         int ret = 0;
1012         int adc;
1013         int chg_type;
1014         bool attached;
1015
1016         mutex_lock(&info->mutex);
1017
1018         /* Read STATUSx register to detect accessory */
1019         ret = regmap_bulk_read(info->max77693->regmap_muic,
1020                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1021         if (ret) {
1022                 dev_err(info->dev, "failed to read MUIC register\n");
1023                 mutex_unlock(&info->mutex);
1024                 return ret;
1025         }
1026
1027         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1028                                         &attached);
1029         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1030                 ret = max77693_muic_adc_handler(info);
1031                 if (ret < 0) {
1032                         dev_err(info->dev, "Cannot detect accessory\n");
1033                         mutex_unlock(&info->mutex);
1034                         return ret;
1035                 }
1036         }
1037
1038         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1039                                         &attached);
1040         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1041                 ret = max77693_muic_chg_handler(info);
1042                 if (ret < 0) {
1043                         dev_err(info->dev, "Cannot detect charger accessory\n");
1044                         mutex_unlock(&info->mutex);
1045                         return ret;
1046                 }
1047         }
1048
1049         mutex_unlock(&info->mutex);
1050
1051         return 0;
1052 }
1053
1054 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1055 {
1056         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1057                                 struct max77693_muic_info, wq_detcable);
1058
1059         max77693_muic_detect_accessory(info);
1060 }
1061
1062 static int max77693_muic_probe(struct platform_device *pdev)
1063 {
1064         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1065         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1066         struct max77693_muic_info *info;
1067         struct max77693_reg_data *init_data;
1068         int num_init_data;
1069         int delay_jiffies;
1070         int ret;
1071         int i;
1072         unsigned int id;
1073
1074         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1075                                    GFP_KERNEL);
1076         if (!info)
1077                 return -ENOMEM;
1078
1079         info->dev = &pdev->dev;
1080         info->max77693 = max77693;
1081         if (info->max77693->regmap_muic) {
1082                 dev_dbg(&pdev->dev, "allocate register map\n");
1083         } else {
1084                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1085                                                 info->max77693->i2c_muic,
1086                                                 &max77693_muic_regmap_config);
1087                 if (IS_ERR(info->max77693->regmap_muic)) {
1088                         ret = PTR_ERR(info->max77693->regmap_muic);
1089                         dev_err(max77693->dev,
1090                                 "failed to allocate register map: %d\n", ret);
1091                         return ret;
1092                 }
1093         }
1094
1095         /* Register input device for button of dock device */
1096         info->dock = devm_input_allocate_device(&pdev->dev);
1097         if (!info->dock) {
1098                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1099                 return -ENOMEM;
1100         }
1101         info->dock->name = "max77693-muic/dock";
1102         info->dock->phys = "max77693-muic/extcon";
1103         info->dock->dev.parent = &pdev->dev;
1104
1105         __set_bit(EV_REP, info->dock->evbit);
1106
1107         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1108         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1109         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1110         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1111         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1112
1113         ret = input_register_device(info->dock);
1114         if (ret < 0) {
1115                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1116                                 ret);
1117                 return ret;
1118         }
1119
1120         platform_set_drvdata(pdev, info);
1121         mutex_init(&info->mutex);
1122
1123         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1124
1125         /* Support irq domain for MAX77693 MUIC device */
1126         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1127                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1128                 unsigned int virq = 0;
1129
1130                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1131                                         muic_irq->irq);
1132                 if (!virq)
1133                         return -EINVAL;
1134                 muic_irq->virq = virq;
1135
1136                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1137                                 max77693_muic_irq_handler,
1138                                 IRQF_NO_SUSPEND,
1139                                 muic_irq->name, info);
1140                 if (ret) {
1141                         dev_err(&pdev->dev,
1142                                 "failed: irq request (IRQ: %d, error :%d)\n",
1143                                 muic_irq->irq, ret);
1144                         return ret;
1145                 }
1146         }
1147
1148         /* Initialize extcon device */
1149         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1150                                               max77693_extcon_cable);
1151         if (IS_ERR(info->edev)) {
1152                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1153                 return -ENOMEM;
1154         }
1155
1156         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1157         if (ret) {
1158                 dev_err(&pdev->dev, "failed to register extcon device\n");
1159                 return ret;
1160         }
1161
1162         /* Initialize MUIC register by using platform data or default data */
1163         if (pdata && pdata->muic_data) {
1164                 init_data = pdata->muic_data->init_data;
1165                 num_init_data = pdata->muic_data->num_init_data;
1166         } else {
1167                 init_data = default_init_data;
1168                 num_init_data = ARRAY_SIZE(default_init_data);
1169         }
1170
1171         for (i = 0; i < num_init_data; i++) {
1172                 regmap_write(info->max77693->regmap_muic,
1173                                 init_data[i].addr,
1174                                 init_data[i].data);
1175         }
1176
1177         if (pdata && pdata->muic_data) {
1178                 struct max77693_muic_platform_data *muic_pdata
1179                                                    = pdata->muic_data;
1180
1181                 /*
1182                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1183                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1184                  */
1185                 if (muic_pdata->path_uart)
1186                         info->path_uart = muic_pdata->path_uart;
1187                 else
1188                         info->path_uart = MAX77693_CONTROL1_SW_UART;
1189
1190                 if (muic_pdata->path_usb)
1191                         info->path_usb = muic_pdata->path_usb;
1192                 else
1193                         info->path_usb = MAX77693_CONTROL1_SW_USB;
1194
1195                 /*
1196                  * Default delay time for detecting cable state
1197                  * after certain time.
1198                  */
1199                 if (muic_pdata->detcable_delay_ms)
1200                         delay_jiffies =
1201                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1202                 else
1203                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1204         } else {
1205                 info->path_usb = MAX77693_CONTROL1_SW_USB;
1206                 info->path_uart = MAX77693_CONTROL1_SW_UART;
1207                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1208         }
1209
1210         /* Set initial path for UART */
1211          max77693_muic_set_path(info, info->path_uart, true);
1212
1213         /* Check revision number of MUIC device*/
1214         ret = regmap_read(info->max77693->regmap_muic,
1215                         MAX77693_MUIC_REG_ID, &id);
1216         if (ret < 0) {
1217                 dev_err(&pdev->dev, "failed to read revision number\n");
1218                 return ret;
1219         }
1220         dev_info(info->dev, "device ID : 0x%x\n", id);
1221
1222         /* Set ADC debounce time */
1223         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1224
1225         /*
1226          * Detect accessory after completing the initialization of platform
1227          *
1228          * - Use delayed workqueue to detect cable state and then
1229          * notify cable state to notifiee/platform through uevent.
1230          * After completing the booting of platform, the extcon provider
1231          * driver should notify cable state to upper layer.
1232          */
1233         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1234         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1235                         delay_jiffies);
1236
1237         return ret;
1238 }
1239
1240 static int max77693_muic_remove(struct platform_device *pdev)
1241 {
1242         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1243
1244         cancel_work_sync(&info->irq_work);
1245         input_unregister_device(info->dock);
1246
1247         return 0;
1248 }
1249
1250 static struct platform_driver max77693_muic_driver = {
1251         .driver         = {
1252                 .name   = DEV_NAME,
1253         },
1254         .probe          = max77693_muic_probe,
1255         .remove         = max77693_muic_remove,
1256 };
1257
1258 module_platform_driver(max77693_muic_driver);
1259
1260 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1261 MODULE_AUTHOR("Chanwoo Choi <[email protected]>");
1262 MODULE_LICENSE("GPL");
1263 MODULE_ALIAS("platform:extcon-max77693");