drivers/extcon/extcon-max77693.c

   1 /*
   2  * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
   3  *
   4  * Copyright (C) 2012 Samsung Electrnoics
   5  * Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/i2c.h>
  21 #include <linux/slab.h>
  22 #include <linux/input.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/err.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/mfd/max77693.h>
  27 #include <linux/mfd/max77693-private.h>
  28 #include <linux/extcon.h>
  29 #include <linux/regmap.h>
  30 #include <linux/irqdomain.h>
  31
  32 #define DEV_NAME                        "max77693-muic"
  33 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
  34
  35 /*
  36  * Default value of MAX77693 register to bring up MUIC device.
  37  * If user don't set some initial value for MUIC device through platform data,
  38  * extcon-max77693 driver use 'default_init_data' to bring up base operation
  39  * of MAX77693 MUIC device.
  40  */
  41 static struct max77693_reg_data default_init_data[] = {
  42         {
  43                 /* STATUS2 - [3]ChgDetRun */
  44                 .addr = MAX77693_MUIC_REG_STATUS2,
  45                 .data = STATUS2_CHGDETRUN_MASK,
  46         }, {
  47                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
  48                 .addr = MAX77693_MUIC_REG_INTMASK1,
  49                 .data = INTMASK1_ADC1K_MASK
  50                         | INTMASK1_ADC_MASK,
  51         }, {
  52                 /* INTMASK2 - Unmask [0]ChgTypM */
  53                 .addr = MAX77693_MUIC_REG_INTMASK2,
  54                 .data = INTMASK2_CHGTYP_MASK,
  55         }, {
  56                 /* INTMASK3 - Mask all of interrupts */
  57                 .addr = MAX77693_MUIC_REG_INTMASK3,
  58                 .data = 0x0,
  59         }, {
  60                 /* CDETCTRL2 */
  61                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
  62                 .data = CDETCTRL2_VIDRMEN_MASK
  63                         | CDETCTRL2_DXOVPEN_MASK,
  64         },
  65 };
  66
  67 enum max77693_muic_adc_debounce_time {
  68         ADC_DEBOUNCE_TIME_5MS = 0,
  69         ADC_DEBOUNCE_TIME_10MS,
  70         ADC_DEBOUNCE_TIME_25MS,
  71         ADC_DEBOUNCE_TIME_38_62MS,
  72 };
  73
  74 struct max77693_muic_info {
  75         struct device *dev;
  76         struct max77693_dev *max77693;
  77         struct extcon_dev *edev;
  78         int prev_cable_type;
  79         int prev_cable_type_gnd;
  80         int prev_chg_type;
  81         int prev_button_type;
  82         u8 status[2];
  83
  84         int irq;
  85         struct work_struct irq_work;
  86         struct mutex mutex;
  87
  88         /*
  89          * Use delayed workqueue to detect cable state and then
  90          * notify cable state to notifiee/platform through uevent.
  91          * After completing the booting of platform, the extcon provider
  92          * driver should notify cable state to upper layer.
  93          */
  94         struct delayed_work wq_detcable;
  95
  96         /* Button of dock device */
  97         struct input_dev *dock;
  98
  99         /*
 100          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
 101          * h/w path of COMP2/COMN1 on CONTROL1 register.
 102          */
 103         int path_usb;
 104         int path_uart;
 105 };
 106
 107 enum max77693_muic_cable_group {
 108         MAX77693_CABLE_GROUP_ADC = 0,
 109         MAX77693_CABLE_GROUP_ADC_GND,
 110         MAX77693_CABLE_GROUP_CHG,
 111         MAX77693_CABLE_GROUP_VBVOLT,
 112 };
 113
 114 enum max77693_muic_charger_type {
 115         MAX77693_CHARGER_TYPE_NONE = 0,
 116         MAX77693_CHARGER_TYPE_USB,
 117         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 118         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 119         MAX77693_CHARGER_TYPE_APPLE_500MA,
 120         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 121         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 122 };
 123
 124 /**
 125  * struct max77693_muic_irq
 126  * @irq: the index of irq list of MUIC device.
 127  * @name: the name of irq.
 128  * @virq: the virtual irq to use irq domain
 129  */
 130 struct max77693_muic_irq {
 131         unsigned int irq;
 132         const char *name;
 133         unsigned int virq;
 134 };
 135
 136 static struct max77693_muic_irq muic_irqs[] = {
 137         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 138         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 139         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 140         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 141         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 142         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 143         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 144         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 145         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 146         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 147         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 148         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 149         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 150         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 151         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 152         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 153 };
 154
 155 /* Define supported accessory type */
 156 enum max77693_muic_acc_type {
 157         MAX77693_MUIC_ADC_GROUND = 0x0,
 158         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 159         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 160         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 161         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 162         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 163         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 164         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 165         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 166         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 167         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 168         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 169         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 170         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 171         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 172         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 173         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 174         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 175         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 176         MAX77693_MUIC_ADC_CEA936_AUDIO,
 177         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 178         MAX77693_MUIC_ADC_TTY_CONVERTER,
 179         MAX77693_MUIC_ADC_UART_CABLE,
 180         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 181         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 182         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 183         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 184         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 185         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 186         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 187         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 188         MAX77693_MUIC_ADC_OPEN,
 189
 190         /* The below accessories have same ADC value so ADCLow and
 191            ADC1K bit is used to separate specific accessory */
 192                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
 193         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
 194         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
 195         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
 196         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
 197         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
 198 };
 199
 200 /*
 201  * MAX77693 MUIC device support below list of accessories(external connector)
 202  */
 203 static const unsigned int max77693_extcon_cable[] = {
 204         EXTCON_USB,
 205         EXTCON_USB_HOST,
 206         EXTCON_TA,
 207         EXTCON_FAST_CHARGER,
 208         EXTCON_SLOW_CHARGER,
 209         EXTCON_CHARGE_DOWNSTREAM,
 210         EXTCON_MHL,
 211         EXTCON_JIG,
 212         EXTCON_DOCK,
 213         EXTCON_NONE,
 214 };
 215
 216 /*
 217  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 218  * @info: the instance including private data of max77693 MUIC
 219  * @time: the debounce time of ADC
 220  */
 221 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 222                 enum max77693_muic_adc_debounce_time time)
 223 {
 224         int ret;
 225
 226         switch (time) {
 227         case ADC_DEBOUNCE_TIME_5MS:
 228         case ADC_DEBOUNCE_TIME_10MS:
 229         case ADC_DEBOUNCE_TIME_25MS:
 230         case ADC_DEBOUNCE_TIME_38_62MS:
 231                 /*
 232                  * Don't touch BTLDset, JIGset when you want to change adc
 233                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 234                  * muic device will be reset and loose current state.
 235                  */
 236                 ret = regmap_write(info->max77693->regmap_muic,
 237                                   MAX77693_MUIC_REG_CTRL3,
 238                                   time << CONTROL3_ADCDBSET_SHIFT);
 239                 if (ret) {
 240                         dev_err(info->dev, "failed to set ADC debounce time\n");
 241                         return ret;
 242                 }
 243                 break;
 244         default:
 245                 dev_err(info->dev, "invalid ADC debounce time\n");
 246                 return -EINVAL;
 247         }
 248
 249         return 0;
 250 };
 251
 252 /*
 253  * max77693_muic_set_path - Set hardware line according to attached cable
 254  * @info: the instance including private data of max77693 MUIC
 255  * @value: the path according to attached cable
 256  * @attached: the state of cable (true:attached, false:detached)
 257  *
 258  * The max77693 MUIC device share outside H/W line among a varity of cables
 259  * so, this function set internal path of H/W line according to the type of
 260  * attached cable.
 261  */
 262 static int max77693_muic_set_path(struct max77693_muic_info *info,
 263                 u8 val, bool attached)
 264 {
 265         int ret = 0;
 266         unsigned int ctrl1, ctrl2 = 0;
 267
 268         if (attached)
 269                 ctrl1 = val;
 270         else
 271                 ctrl1 = CONTROL1_SW_OPEN;
 272
 273         ret = regmap_update_bits(info->max77693->regmap_muic,
 274                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 275         if (ret < 0) {
 276                 dev_err(info->dev, "failed to update MUIC register\n");
 277                 return ret;
 278         }
 279
 280         if (attached)
 281                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 282         else
 283                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 284
 285         ret = regmap_update_bits(info->max77693->regmap_muic,
 286                         MAX77693_MUIC_REG_CTRL2,
 287                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK, ctrl2);
 288         if (ret < 0) {
 289                 dev_err(info->dev, "failed to update MUIC register\n");
 290                 return ret;
 291         }
 292
 293         dev_info(info->dev,
 294                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 295                 ctrl1, ctrl2, attached ? "attached" : "detached");
 296
 297         return 0;
 298 }
 299
 300 /*
 301  * max77693_muic_get_cable_type - Return cable type and check cable state
 302  * @info: the instance including private data of max77693 MUIC
 303  * @group: the path according to attached cable
 304  * @attached: store cable state and return
 305  *
 306  * This function check the cable state either attached or detached,
 307  * and then divide precise type of cable according to cable group.
 308  *      - MAX77693_CABLE_GROUP_ADC
 309  *      - MAX77693_CABLE_GROUP_ADC_GND
 310  *      - MAX77693_CABLE_GROUP_CHG
 311  *      - MAX77693_CABLE_GROUP_VBVOLT
 312  */
 313 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 314                 enum max77693_muic_cable_group group, bool *attached)
 315 {
 316         int cable_type = 0;
 317         int adc;
 318         int adc1k;
 319         int adclow;
 320         int vbvolt;
 321         int chg_type;
 322
 323         switch (group) {
 324         case MAX77693_CABLE_GROUP_ADC:
 325                 /*
 326                  * Read ADC value to check cable type and decide cable state
 327                  * according to cable type
 328                  */
 329                 adc = info->status[0] & STATUS1_ADC_MASK;
 330                 adc >>= STATUS1_ADC_SHIFT;
 331
 332                 /*
 333                  * Check current cable state/cable type and store cable type
 334                  * (info->prev_cable_type) for handling cable when cable is
 335                  * detached.
 336                  */
 337                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 338                         *attached = false;
 339
 340                         cable_type = info->prev_cable_type;
 341                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 342                 } else {
 343                         *attached = true;
 344
 345                         cable_type = info->prev_cable_type = adc;
 346                 }
 347                 break;
 348         case MAX77693_CABLE_GROUP_ADC_GND:
 349                 /*
 350                  * Read ADC value to check cable type and decide cable state
 351                  * according to cable type
 352                  */
 353                 adc = info->status[0] & STATUS1_ADC_MASK;
 354                 adc >>= STATUS1_ADC_SHIFT;
 355
 356                 /*
 357                  * Check current cable state/cable type and store cable type
 358                  * (info->prev_cable_type/_gnd) for handling cable when cable
 359                  * is detached.
 360                  */
 361                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 362                         *attached = false;
 363
 364                         cable_type = info->prev_cable_type_gnd;
 365                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 366                 } else {
 367                         *attached = true;
 368
 369                         adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 370                         adclow >>= STATUS1_ADCLOW_SHIFT;
 371                         adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 372                         adc1k >>= STATUS1_ADC1K_SHIFT;
 373
 374                         vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 375                         vbvolt >>= STATUS2_VBVOLT_SHIFT;
 376
 377                         /**
 378                          * [0x1|VBVolt|ADCLow|ADC1K]
 379                          * [0x1|     0|     0|    0] USB_HOST
 380                          * [0x1|     1|     0|    0] USB_HSOT_VB
 381                          * [0x1|     0|     1|    0] Audio Video cable with load
 382                          * [0x1|     0|     1|    1] MHL without charging cable
 383                          * [0x1|     1|     1|    1] MHL with charging cable
 384                          */
 385                         cable_type = ((0x1 << 8)
 386                                         | (vbvolt << 2)
 387                                         | (adclow << 1)
 388                                         | adc1k);
 389
 390                         info->prev_cable_type = adc;
 391                         info->prev_cable_type_gnd = cable_type;
 392                 }
 393
 394                 break;
 395         case MAX77693_CABLE_GROUP_CHG:
 396                 /*
 397                  * Read charger type to check cable type and decide cable state
 398                  * according to type of charger cable.
 399                  */
 400                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 401                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 402
 403                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 404                         *attached = false;
 405
 406                         cable_type = info->prev_chg_type;
 407                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 408                 } else {
 409                         *attached = true;
 410
 411                         /*
 412                          * Check current cable state/cable type and store cable
 413                          * type(info->prev_chg_type) for handling cable when
 414                          * charger cable is detached.
 415                          */
 416                         cable_type = info->prev_chg_type = chg_type;
 417                 }
 418
 419                 break;
 420         case MAX77693_CABLE_GROUP_VBVOLT:
 421                 /*
 422                  * Read ADC value to check cable type and decide cable state
 423                  * according to cable type
 424                  */
 425                 adc = info->status[0] & STATUS1_ADC_MASK;
 426                 adc >>= STATUS1_ADC_SHIFT;
 427                 chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 428                 chg_type >>= STATUS2_CHGTYP_SHIFT;
 429
 430                 if (adc == MAX77693_MUIC_ADC_OPEN
 431                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 432                         *attached = false;
 433                 else
 434                         *attached = true;
 435
 436                 /*
 437                  * Read vbvolt field, if vbvolt is 1,
 438                  * this cable is used for charging.
 439                  */
 440                 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
 441                 vbvolt >>= STATUS2_VBVOLT_SHIFT;
 442
 443                 cable_type = vbvolt;
 444                 break;
 445         default:
 446                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 447                 cable_type = -EINVAL;
 448                 break;
 449         }
 450
 451         return cable_type;
 452 }
 453
 454 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 455                 int cable_type, bool attached)
 456 {
 457         int ret = 0;
 458         int vbvolt;
 459         bool cable_attached;
 460         unsigned int dock_id;
 461
 462         dev_info(info->dev,
 463                 "external connector is %s (adc:0x%02x)\n",
 464                 attached ? "attached" : "detached", cable_type);
 465
 466         switch (cable_type) {
 467         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 468                 /*
 469                  * Check power cable whether attached or detached state.
 470                  * The Dock-Smart device need surely external power supply.
 471                  * If power cable(USB/TA) isn't connected to Dock device,
 472                  * user can't use Dock-Smart for desktop mode.
 473                  */
 474                 vbvolt = max77693_muic_get_cable_type(info,
 475                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 476                 if (attached && !vbvolt) {
 477                         dev_warn(info->dev,
 478                                 "Cannot detect external power supply\n");
 479                         return 0;
 480                 }
 481
 482                 /*
 483                  * Notify Dock/MHL state.
 484                  * - Dock device include three type of cable which
 485                  * are HDMI, USB for mouse/keyboard and micro-usb port
 486                  * for USB/TA cable. Dock device need always exteranl
 487                  * power supply(USB/TA cable through micro-usb cable). Dock
 488                  * device support screen output of target to separate
 489                  * monitor and mouse/keyboard for desktop mode.
 490                  *
 491                  * Features of 'USB/TA cable with Dock device'
 492                  * - Support MHL
 493                  * - Support external output feature of audio
 494                  * - Support charging through micro-usb port without data
 495                  *           connection if TA cable is connected to target.
 496                  * - Support charging and data connection through micro-usb port
 497                  *           if USB cable is connected between target and host
 498                  *           device.
 499                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 500                  */
 501                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 502                 if (ret < 0)
 503                         return ret;
 504
 505                 extcon_set_cable_state_(info->edev, EXTCON_DOCK, attached);
 506                 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
 507                 goto out;
 508         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 509                 dock_id = EXTCON_DOCK;
 510                 break;
 511         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 512                 dock_id = EXTCON_DOCK;
 513                 if (!attached)
 514                         extcon_set_cable_state_(info->edev, EXTCON_USB, false);
 515                 break;
 516         default:
 517                 dev_err(info->dev, "failed to detect %s dock device\n",
 518                         attached ? "attached" : "detached");
 519                 return -EINVAL;
 520         }
 521
 522         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 523         ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 524         if (ret < 0)
 525                 return ret;
 526         extcon_set_cable_state_(info->edev, dock_id, attached);
 527
 528 out:
 529         return 0;
 530 }
 531
 532 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 533                 int button_type, bool attached)
 534 {
 535         struct input_dev *dock = info->dock;
 536         unsigned int code;
 537
 538         switch (button_type) {
 539         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 540                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 541                 /* DOCK_KEY_PREV */
 542                 code = KEY_PREVIOUSSONG;
 543                 break;
 544         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 545                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 546                 /* DOCK_KEY_NEXT */
 547                 code = KEY_NEXTSONG;
 548                 break;
 549         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 550                 /* DOCK_VOL_DOWN */
 551                 code = KEY_VOLUMEDOWN;
 552                 break;
 553         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 554                 /* DOCK_VOL_UP */
 555                 code = KEY_VOLUMEUP;
 556                 break;
 557         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 558                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 559                 /* DOCK_KEY_PLAY_PAUSE */
 560                 code = KEY_PLAYPAUSE;
 561                 break;
 562         default:
 563                 dev_err(info->dev,
 564                         "failed to detect %s key (adc:0x%x)\n",
 565                         attached ? "pressed" : "released", button_type);
 566                 return -EINVAL;
 567         }
 568
 569         input_event(dock, EV_KEY, code, attached);
 570         input_sync(dock);
 571
 572         return 0;
 573 }
 574
 575 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 576 {
 577         int cable_type_gnd;
 578         int ret = 0;
 579         bool attached;
 580
 581         cable_type_gnd = max77693_muic_get_cable_type(info,
 582                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 583
 584         switch (cable_type_gnd) {
 585         case MAX77693_MUIC_GND_USB_HOST:
 586         case MAX77693_MUIC_GND_USB_HOST_VB:
 587                 /* USB_HOST, PATH: AP_USB */
 588                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 589                 if (ret < 0)
 590                         return ret;
 591                 extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
 592                 break;
 593         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 594                 /* Audio Video Cable with load, PATH:AUDIO */
 595                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 596                 if (ret < 0)
 597                         return ret;
 598                 extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
 599                 break;
 600         case MAX77693_MUIC_GND_MHL:
 601         case MAX77693_MUIC_GND_MHL_VB:
 602                 /* MHL or MHL with USB/TA cable */
 603                 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached);
 604                 break;
 605         default:
 606                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 607                         attached ? "attached" : "detached");
 608                 return -EINVAL;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 615                 int cable_type, bool attached)
 616 {
 617         int ret = 0;
 618         u8 path = CONTROL1_SW_OPEN;
 619
 620         dev_info(info->dev,
 621                 "external connector is %s (adc:0x%02x)\n",
 622                 attached ? "attached" : "detached", cable_type);
 623
 624         switch (cable_type) {
 625         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 626         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 627                 /* PATH:AP_USB */
 628                 path = CONTROL1_SW_USB;
 629                 break;
 630         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 631         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 632                 /* PATH:AP_UART */
 633                 path = CONTROL1_SW_UART;
 634                 break;
 635         default:
 636                 dev_err(info->dev, "failed to detect %s jig cable\n",
 637                         attached ? "attached" : "detached");
 638                 return -EINVAL;
 639         }
 640
 641         ret = max77693_muic_set_path(info, path, attached);
 642         if (ret < 0)
 643                 return ret;
 644
 645         extcon_set_cable_state_(info->edev, EXTCON_JIG, attached);
 646
 647         return 0;
 648 }
 649
 650 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 651 {
 652         int cable_type;
 653         int button_type;
 654         bool attached;
 655         int ret = 0;
 656
 657         /* Check accessory state which is either detached or attached */
 658         cable_type = max77693_muic_get_cable_type(info,
 659                                 MAX77693_CABLE_GROUP_ADC, &attached);
 660
 661         dev_info(info->dev,
 662                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 663                 attached ? "attached" : "detached", cable_type,
 664                 info->prev_cable_type);
 665
 666         switch (cable_type) {
 667         case MAX77693_MUIC_ADC_GROUND:
 668                 /* USB_HOST/MHL/Audio */
 669                 max77693_muic_adc_ground_handler(info);
 670                 break;
 671         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 672         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 673         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 674         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 675                 /* JIG */
 676                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 677                 if (ret < 0)
 678                         return ret;
 679                 break;
 680         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 681         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 682         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 683                 /*
 684                  * DOCK device
 685                  *
 686                  * The MAX77693 MUIC device can detect total 34 cable type
 687                  * except of charger cable and MUIC device didn't define
 688                  * specfic role of cable in the range of from 0x01 to 0x12
 689                  * of ADC value. So, can use/define cable with no role according
 690                  * to schema of hardware board.
 691                  */
 692                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 693                 if (ret < 0)
 694                         return ret;
 695                 break;
 696         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 697         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 698         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 699         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 700         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 701                 /*
 702                  * Button of DOCK device
 703                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 704                  *
 705                  * The MAX77693 MUIC device can detect total 34 cable type
 706                  * except of charger cable and MUIC device didn't define
 707                  * specfic role of cable in the range of from 0x01 to 0x12
 708                  * of ADC value. So, can use/define cable with no role according
 709                  * to schema of hardware board.
 710                  */
 711                 if (attached)
 712                         button_type = info->prev_button_type = cable_type;
 713                 else
 714                         button_type = info->prev_button_type;
 715
 716                 ret = max77693_muic_dock_button_handler(info, button_type,
 717                                                         attached);
 718                 if (ret < 0)
 719                         return ret;
 720                 break;
 721         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 722         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 723         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 724         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 725         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 726         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 727         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 728         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 729         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 730         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 731         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 732         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 733         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 734         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 735         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 736         case MAX77693_MUIC_ADC_UART_CABLE:
 737         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 738         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 739                 /*
 740                  * This accessory isn't used in general case if it is specially
 741                  * needed to detect additional accessory, should implement
 742                  * proper operation when this accessory is attached/detached.
 743                  */
 744                 dev_info(info->dev,
 745                         "accessory is %s but it isn't used (adc:0x%x)\n",
 746                         attached ? "attached" : "detached", cable_type);
 747                 return -EAGAIN;
 748         default:
 749                 dev_err(info->dev,
 750                         "failed to detect %s accessory (adc:0x%x)\n",
 751                         attached ? "attached" : "detached", cable_type);
 752                 return -EINVAL;
 753         }
 754
 755         return 0;
 756 }
 757
 758 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 759 {
 760         int chg_type;
 761         int cable_type_gnd;
 762         int cable_type;
 763         bool attached;
 764         bool cable_attached;
 765         int ret = 0;
 766
 767         chg_type = max77693_muic_get_cable_type(info,
 768                                 MAX77693_CABLE_GROUP_CHG, &attached);
 769
 770         dev_info(info->dev,
 771                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 772                         attached ? "attached" : "detached",
 773                         chg_type, info->prev_chg_type);
 774
 775         switch (chg_type) {
 776         case MAX77693_CHARGER_TYPE_USB:
 777         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 778         case MAX77693_CHARGER_TYPE_NONE:
 779                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 780                 cable_type_gnd = max77693_muic_get_cable_type(info,
 781                                         MAX77693_CABLE_GROUP_ADC_GND,
 782                                         &cable_attached);
 783                 switch (cable_type_gnd) {
 784                 case MAX77693_MUIC_GND_MHL:
 785                 case MAX77693_MUIC_GND_MHL_VB:
 786                         /*
 787                          * MHL cable with USB/TA cable
 788                          * - MHL cable include two port(HDMI line and separate
 789                          * micro-usb port. When the target connect MHL cable,
 790                          * extcon driver check whether USB/TA cable is
 791                          * connected. If USB/TA cable is connected, extcon
 792                          * driver notify state to notifiee for charging battery.
 793                          *
 794                          * Features of 'USB/TA with MHL cable'
 795                          * - Support MHL
 796                          * - Support charging through micro-usb port without
 797                          *   data connection
 798                          */
 799                         extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
 800                         if (!cable_attached)
 801                                 extcon_set_cable_state_(info->edev, EXTCON_MHL,
 802                                                         cable_attached);
 803                         break;
 804                 }
 805
 806                 /* Check MAX77693_CABLE_GROUP_ADC type */
 807                 cable_type = max77693_muic_get_cable_type(info,
 808                                         MAX77693_CABLE_GROUP_ADC,
 809                                         &cable_attached);
 810                 switch (cable_type) {
 811                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 812                         /*
 813                          * Dock-Audio device with USB/TA cable
 814                          * - Dock device include two port(Dock-Audio and micro-
 815                          * usb port). When the target connect Dock-Audio device,
 816                          * extcon driver check whether USB/TA cable is connected
 817                          * or not. If USB/TA cable is connected, extcon driver
 818                          * notify state to notifiee for charging battery.
 819                          *
 820                          * Features of 'USB/TA cable with Dock-Audio device'
 821                          * - Support external output feature of audio.
 822                          * - Support charging through micro-usb port without
 823                          *   data connection.
 824                          */
 825                         extcon_set_cable_state_(info->edev, EXTCON_USB,
 826                                                 attached);
 827
 828                         if (!cable_attached)
 829                                 extcon_set_cable_state_(info->edev, EXTCON_DOCK,
 830                                                         cable_attached);
 831                         break;
 832                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 833                         /*
 834                          * Dock-Smart device with USB/TA cable
 835                          * - Dock-Desk device include three type of cable which
 836                          * are HDMI, USB for mouse/keyboard and micro-usb port
 837                          * for USB/TA cable. Dock-Smart device need always
 838                          * exteranl power supply(USB/TA cable through micro-usb
 839                          * cable). Dock-Smart device support screen output of
 840                          * target to separate monitor and mouse/keyboard for
 841                          * desktop mode.
 842                          *
 843                          * Features of 'USB/TA cable with Dock-Smart device'
 844                          * - Support MHL
 845                          * - Support external output feature of audio
 846                          * - Support charging through micro-usb port without
 847                          *   data connection if TA cable is connected to target.
 848                          * - Support charging and data connection through micro-
 849                          *   usb port if USB cable is connected between target
 850                          *   and host device
 851                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 852                          */
 853                         ret = max77693_muic_set_path(info, info->path_usb,
 854                                                     attached);
 855                         if (ret < 0)
 856                                 return ret;
 857
 858                         extcon_set_cable_state_(info->edev, EXTCON_DOCK,
 859                                                 attached);
 860                         extcon_set_cable_state_(info->edev, EXTCON_MHL,
 861                                                 attached);
 862                         break;
 863                 }
 864
 865                 /* Check MAX77693_CABLE_GROUP_CHG type */
 866                 switch (chg_type) {
 867                 case MAX77693_CHARGER_TYPE_NONE:
 868                         /*
 869                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 870                          * cable is attached, muic device happen below two irq.
 871                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 872                          *    MHL/Dock-Audio.
 873                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 874                          *    USB/TA cable connected to MHL or Dock-Audio.
 875                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 876                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 877                          *
 878                          * If user attach MHL (with USB/TA cable and immediately
 879                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 880                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 881                          * connected state to target. But USB/TA cable isn't
 882                          * connected to target. The user be face with unusual
 883                          * action. So, driver should check this situation in
 884                          * spite of, that previous charger type is N/A.
 885                          */
 886                         break;
 887                 case MAX77693_CHARGER_TYPE_USB:
 888                         /* Only USB cable, PATH:AP_USB */
 889                         ret = max77693_muic_set_path(info, info->path_usb,
 890                                                     attached);
 891                         if (ret < 0)
 892                                 return ret;
 893
 894                         extcon_set_cable_state_(info->edev, EXTCON_USB,
 895                                                 attached);
 896                         break;
 897                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 898                         /* Only TA cable */
 899                         extcon_set_cable_state_(info->edev, EXTCON_TA, attached);
 900                         break;
 901                 }
 902                 break;
 903         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 904                 extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM,
 905                                         attached);
 906                 break;
 907         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 908                 extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER,
 909                                         attached);
 910                 break;
 911         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 912                 extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER,
 913                                         attached);
 914                 break;
 915         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 916                 break;
 917         default:
 918                 dev_err(info->dev,
 919                         "failed to detect %s accessory (chg_type:0x%x)\n",
 920                         attached ? "attached" : "detached", chg_type);
 921                 return -EINVAL;
 922         }
 923
 924         return 0;
 925 }
 926
 927 static void max77693_muic_irq_work(struct work_struct *work)
 928 {
 929         struct max77693_muic_info *info = container_of(work,
 930                         struct max77693_muic_info, irq_work);
 931         int irq_type = -1;
 932         int i, ret = 0;
 933
 934         if (!info->edev)
 935                 return;
 936
 937         mutex_lock(&info->mutex);
 938
 939         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 940                 if (info->irq == muic_irqs[i].virq)
 941                         irq_type = muic_irqs[i].irq;
 942
 943         ret = regmap_bulk_read(info->max77693->regmap_muic,
 944                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 945         if (ret) {
 946                 dev_err(info->dev, "failed to read MUIC register\n");
 947                 mutex_unlock(&info->mutex);
 948                 return;
 949         }
 950
 951         switch (irq_type) {
 952         case MAX77693_MUIC_IRQ_INT1_ADC:
 953         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 954         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 955         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 956                 /* Handle all of accessory except for
 957                    type of charger accessory */
 958                 ret = max77693_muic_adc_handler(info);
 959                 break;
 960         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 961         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 962         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 963         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 964         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 965         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 966                 /* Handle charger accessory */
 967                 ret = max77693_muic_chg_handler(info);
 968                 break;
 969         case MAX77693_MUIC_IRQ_INT3_EOC:
 970         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 971         case MAX77693_MUIC_IRQ_INT3_OVP:
 972         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 973         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 974         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 975                 break;
 976         default:
 977                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 978                                 irq_type);
 979                 mutex_unlock(&info->mutex);
 980                 return;
 981         }
 982
 983         if (ret < 0)
 984                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 985
 986         mutex_unlock(&info->mutex);
 987 }
 988
 989 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
 990 {
 991         struct max77693_muic_info *info = data;
 992
 993         info->irq = irq;
 994         schedule_work(&info->irq_work);
 995
 996         return IRQ_HANDLED;
 997 }
 998
 999 static const struct regmap_config max77693_muic_regmap_config = {
1000         .reg_bits = 8,
1001         .val_bits = 8,
1002 };
1003
1004 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1005 {
1006         int ret = 0;
1007         int adc;
1008         int chg_type;
1009         bool attached;
1010
1011         mutex_lock(&info->mutex);
1012
1013         /* Read STATUSx register to detect accessory */
1014         ret = regmap_bulk_read(info->max77693->regmap_muic,
1015                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1016         if (ret) {
1017                 dev_err(info->dev, "failed to read MUIC register\n");
1018                 mutex_unlock(&info->mutex);
1019                 return ret;
1020         }
1021
1022         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1023                                         &attached);
1024         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1025                 ret = max77693_muic_adc_handler(info);
1026                 if (ret < 0) {
1027                         dev_err(info->dev, "Cannot detect accessory\n");
1028                         mutex_unlock(&info->mutex);
1029                         return ret;
1030                 }
1031         }
1032
1033         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1034                                         &attached);
1035         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1036                 ret = max77693_muic_chg_handler(info);
1037                 if (ret < 0) {
1038                         dev_err(info->dev, "Cannot detect charger accessory\n");
1039                         mutex_unlock(&info->mutex);
1040                         return ret;
1041                 }
1042         }
1043
1044         mutex_unlock(&info->mutex);
1045
1046         return 0;
1047 }
1048
1049 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1050 {
1051         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1052                                 struct max77693_muic_info, wq_detcable);
1053
1054         max77693_muic_detect_accessory(info);
1055 }
1056
1057 static int max77693_muic_probe(struct platform_device *pdev)
1058 {
1059         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1060         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1061         struct max77693_muic_info *info;
1062         struct max77693_reg_data *init_data;
1063         int num_init_data;
1064         int delay_jiffies;
1065         int ret;
1066         int i;
1067         unsigned int id;
1068
1069         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1070                                    GFP_KERNEL);
1071         if (!info)
1072                 return -ENOMEM;
1073
1074         info->dev = &pdev->dev;
1075         info->max77693 = max77693;
1076         if (info->max77693->regmap_muic) {
1077                 dev_dbg(&pdev->dev, "allocate register map\n");
1078         } else {
1079                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1080                                                 info->max77693->muic,
1081                                                 &max77693_muic_regmap_config);
1082                 if (IS_ERR(info->max77693->regmap_muic)) {
1083                         ret = PTR_ERR(info->max77693->regmap_muic);
1084                         dev_err(max77693->dev,
1085                                 "failed to allocate register map: %d\n", ret);
1086                         return ret;
1087                 }
1088         }
1089
1090         /* Register input device for button of dock device */
1091         info->dock = devm_input_allocate_device(&pdev->dev);
1092         if (!info->dock) {
1093                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1094                 return -ENOMEM;
1095         }
1096         info->dock->name = "max77693-muic/dock";
1097         info->dock->phys = "max77693-muic/extcon";
1098         info->dock->dev.parent = &pdev->dev;
1099
1100         __set_bit(EV_REP, info->dock->evbit);
1101
1102         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1103         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1104         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1105         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1106         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1107
1108         ret = input_register_device(info->dock);
1109         if (ret < 0) {
1110                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1111                                 ret);
1112                 return ret;
1113         }
1114
1115         platform_set_drvdata(pdev, info);
1116         mutex_init(&info->mutex);
1117
1118         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1119
1120         /* Support irq domain for MAX77693 MUIC device */
1121         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1122                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1123                 unsigned int virq = 0;
1124
1125                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1126                                         muic_irq->irq);
1127                 if (!virq)
1128                         return -EINVAL;
1129                 muic_irq->virq = virq;
1130
1131                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1132                                 max77693_muic_irq_handler,
1133                                 IRQF_NO_SUSPEND,
1134                                 muic_irq->name, info);
1135                 if (ret) {
1136                         dev_err(&pdev->dev,
1137                                 "failed: irq request (IRQ: %d, error :%d)\n",
1138                                 muic_irq->irq, ret);
1139                         return ret;
1140                 }
1141         }
1142
1143         /* Initialize extcon device */
1144         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1145                                               max77693_extcon_cable);
1146         if (IS_ERR(info->edev)) {
1147                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1148                 return -ENOMEM;
1149         }
1150
1151         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1152         if (ret) {
1153                 dev_err(&pdev->dev, "failed to register extcon device\n");
1154                 return ret;
1155         }
1156
1157         /* Initialize MUIC register by using platform data or default data */
1158         if (pdata && pdata->muic_data) {
1159                 init_data = pdata->muic_data->init_data;
1160                 num_init_data = pdata->muic_data->num_init_data;
1161         } else {
1162                 init_data = default_init_data;
1163                 num_init_data = ARRAY_SIZE(default_init_data);
1164         }
1165
1166         for (i = 0; i < num_init_data; i++) {
1167                 enum max77693_irq_source irq_src
1168                                 = MAX77693_IRQ_GROUP_NR;
1169
1170                 regmap_write(info->max77693->regmap_muic,
1171                                 init_data[i].addr,
1172                                 init_data[i].data);
1173
1174                 switch (init_data[i].addr) {
1175                 case MAX77693_MUIC_REG_INTMASK1:
1176                         irq_src = MUIC_INT1;
1177                         break;
1178                 case MAX77693_MUIC_REG_INTMASK2:
1179                         irq_src = MUIC_INT2;
1180                         break;
1181                 case MAX77693_MUIC_REG_INTMASK3:
1182                         irq_src = MUIC_INT3;
1183                         break;
1184                 }
1185
1186                 if (irq_src < MAX77693_IRQ_GROUP_NR)
1187                         info->max77693->irq_masks_cur[irq_src]
1188                                 = init_data[i].data;
1189         }
1190
1191         if (pdata && pdata->muic_data) {
1192                 struct max77693_muic_platform_data *muic_pdata
1193                                                    = pdata->muic_data;
1194
1195                 /*
1196                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1197                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1198                  */
1199                 if (muic_pdata->path_uart)
1200                         info->path_uart = muic_pdata->path_uart;
1201                 else
1202                         info->path_uart = CONTROL1_SW_UART;
1203
1204                 if (muic_pdata->path_usb)
1205                         info->path_usb = muic_pdata->path_usb;
1206                 else
1207                         info->path_usb = CONTROL1_SW_USB;
1208
1209                 /*
1210                  * Default delay time for detecting cable state
1211                  * after certain time.
1212                  */
1213                 if (muic_pdata->detcable_delay_ms)
1214                         delay_jiffies =
1215                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1216                 else
1217                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1218         } else {
1219                 info->path_usb = CONTROL1_SW_USB;
1220                 info->path_uart = CONTROL1_SW_UART;
1221                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1222         }
1223
1224         /* Set initial path for UART */
1225          max77693_muic_set_path(info, info->path_uart, true);
1226
1227         /* Check revision number of MUIC device*/
1228         ret = regmap_read(info->max77693->regmap_muic,
1229                         MAX77693_MUIC_REG_ID, &id);
1230         if (ret < 0) {
1231                 dev_err(&pdev->dev, "failed to read revision number\n");
1232                 return ret;
1233         }
1234         dev_info(info->dev, "device ID : 0x%x\n", id);
1235
1236         /* Set ADC debounce time */
1237         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1238
1239         /*
1240          * Detect accessory after completing the initialization of platform
1241          *
1242          * - Use delayed workqueue to detect cable state and then
1243          * notify cable state to notifiee/platform through uevent.
1244          * After completing the booting of platform, the extcon provider
1245          * driver should notify cable state to upper layer.
1246          */
1247         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1248         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1249                         delay_jiffies);
1250
1251         return ret;
1252 }
1253
1254 static int max77693_muic_remove(struct platform_device *pdev)
1255 {
1256         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1257
1258         cancel_work_sync(&info->irq_work);
1259         input_unregister_device(info->dock);
1260
1261         return 0;
1262 }
1263
1264 static struct platform_driver max77693_muic_driver = {
1265         .driver         = {
1266                 .name   = DEV_NAME,
1267         },
1268         .probe          = max77693_muic_probe,
1269         .remove         = max77693_muic_remove,
1270 };
1271
1272 module_platform_driver(max77693_muic_driver);
1273
1274 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1275 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1276 MODULE_LICENSE("GPL");
1277 MODULE_ALIAS("platform:extcon-max77693");