drivers/extcon/extcon-max77693.c

   1 /*
   2  * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
   3  *
   4  * Copyright (C) 2012 Samsung Electrnoics
   5  * Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/i2c.h>
  21 #include <linux/slab.h>
  22 #include <linux/input.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/err.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/mfd/max77693.h>
  27 #include <linux/mfd/max77693-common.h>
  28 #include <linux/mfd/max77693-private.h>
  29 #include <linux/extcon.h>
  30 #include <linux/regmap.h>
  31 #include <linux/irqdomain.h>
  32
  33 #define DEV_NAME                        "max77693-muic"
  34 #define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
  35
  36 /*
  37  * Default value of MAX77693 register to bring up MUIC device.
  38  * If user don't set some initial value for MUIC device through platform data,
  39  * extcon-max77693 driver use 'default_init_data' to bring up base operation
  40  * of MAX77693 MUIC device.
  41  */
  42 static struct max77693_reg_data default_init_data[] = {
  43         {
  44                 /* STATUS2 - [3]ChgDetRun */
  45                 .addr = MAX77693_MUIC_REG_STATUS2,
  46                 .data = MAX77693_STATUS2_CHGDETRUN_MASK,
  47         }, {
  48                 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
  49                 .addr = MAX77693_MUIC_REG_INTMASK1,
  50                 .data = INTMASK1_ADC1K_MASK
  51                         | INTMASK1_ADC_MASK,
  52         }, {
  53                 /* INTMASK2 - Unmask [0]ChgTypM */
  54                 .addr = MAX77693_MUIC_REG_INTMASK2,
  55                 .data = INTMASK2_CHGTYP_MASK,
  56         }, {
  57                 /* INTMASK3 - Mask all of interrupts */
  58                 .addr = MAX77693_MUIC_REG_INTMASK3,
  59                 .data = 0x0,
  60         }, {
  61                 /* CDETCTRL2 */
  62                 .addr = MAX77693_MUIC_REG_CDETCTRL2,
  63                 .data = CDETCTRL2_VIDRMEN_MASK
  64                         | CDETCTRL2_DXOVPEN_MASK,
  65         },
  66 };
  67
  68 enum max77693_muic_adc_debounce_time {
  69         ADC_DEBOUNCE_TIME_5MS = 0,
  70         ADC_DEBOUNCE_TIME_10MS,
  71         ADC_DEBOUNCE_TIME_25MS,
  72         ADC_DEBOUNCE_TIME_38_62MS,
  73 };
  74
  75 struct max77693_muic_info {
  76         struct device *dev;
  77         struct max77693_dev *max77693;
  78         struct extcon_dev *edev;
  79         int prev_cable_type;
  80         int prev_cable_type_gnd;
  81         int prev_chg_type;
  82         int prev_button_type;
  83         u8 status[2];
  84
  85         int irq;
  86         struct work_struct irq_work;
  87         struct mutex mutex;
  88
  89         /*
  90          * Use delayed workqueue to detect cable state and then
  91          * notify cable state to notifiee/platform through uevent.
  92          * After completing the booting of platform, the extcon provider
  93          * driver should notify cable state to upper layer.
  94          */
  95         struct delayed_work wq_detcable;
  96
  97         /* Button of dock device */
  98         struct input_dev *dock;
  99
 100         /*
 101          * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
 102          * h/w path of COMP2/COMN1 on CONTROL1 register.
 103          */
 104         int path_usb;
 105         int path_uart;
 106 };
 107
 108 enum max77693_muic_cable_group {
 109         MAX77693_CABLE_GROUP_ADC = 0,
 110         MAX77693_CABLE_GROUP_ADC_GND,
 111         MAX77693_CABLE_GROUP_CHG,
 112         MAX77693_CABLE_GROUP_VBVOLT,
 113 };
 114
 115 enum max77693_muic_charger_type {
 116         MAX77693_CHARGER_TYPE_NONE = 0,
 117         MAX77693_CHARGER_TYPE_USB,
 118         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 119         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 120         MAX77693_CHARGER_TYPE_APPLE_500MA,
 121         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 122         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 123 };
 124
 125 /**
 126  * struct max77693_muic_irq
 127  * @irq: the index of irq list of MUIC device.
 128  * @name: the name of irq.
 129  * @virq: the virtual irq to use irq domain
 130  */
 131 struct max77693_muic_irq {
 132         unsigned int irq;
 133         const char *name;
 134         unsigned int virq;
 135 };
 136
 137 static struct max77693_muic_irq muic_irqs[] = {
 138         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 139         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 140         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 141         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 142         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 143         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 144         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 145         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 146         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 147         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 148         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 149         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 150         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 151         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 152         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 153         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 154 };
 155
 156 /* Define supported accessory type */
 157 enum max77693_muic_acc_type {
 158         MAX77693_MUIC_ADC_GROUND = 0x0,
 159         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 160         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 161         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 162         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 163         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 164         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 165         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 166         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 167         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 168         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 169         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 170         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 171         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 172         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 173         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 174         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 175         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 176         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 177         MAX77693_MUIC_ADC_CEA936_AUDIO,
 178         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 179         MAX77693_MUIC_ADC_TTY_CONVERTER,
 180         MAX77693_MUIC_ADC_UART_CABLE,
 181         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 182         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 183         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 184         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 185         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 186         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 187         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 188         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 189         MAX77693_MUIC_ADC_OPEN,
 190
 191         /*
 192          * The below accessories have same ADC value so ADCLow and
 193          * ADC1K bit is used to separate specific accessory.
 194          */
 195                                                 /* ADC|VBVolot|ADCLow|ADC1K| */
 196         MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
 197         MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
 198         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
 199         MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
 200         MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
 201 };
 202
 203 /*
 204  * MAX77693 MUIC device support below list of accessories(external connector)
 205  */
 206 static const unsigned int max77693_extcon_cable[] = {
 207         EXTCON_USB,
 208         EXTCON_USB_HOST,
 209         EXTCON_CHG_USB_SDP,
 210         EXTCON_CHG_USB_DCP,
 211         EXTCON_CHG_USB_FAST,
 212         EXTCON_CHG_USB_SLOW,
 213         EXTCON_CHG_USB_CDP,
 214         EXTCON_DISP_MHL,
 215         EXTCON_JIG,
 216         EXTCON_DOCK,
 217         EXTCON_NONE,
 218 };
 219
 220 /*
 221  * max77693_muic_set_debounce_time - Set the debounce time of ADC
 222  * @info: the instance including private data of max77693 MUIC
 223  * @time: the debounce time of ADC
 224  */
 225 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 226                 enum max77693_muic_adc_debounce_time time)
 227 {
 228         int ret;
 229
 230         switch (time) {
 231         case ADC_DEBOUNCE_TIME_5MS:
 232         case ADC_DEBOUNCE_TIME_10MS:
 233         case ADC_DEBOUNCE_TIME_25MS:
 234         case ADC_DEBOUNCE_TIME_38_62MS:
 235                 /*
 236                  * Don't touch BTLDset, JIGset when you want to change adc
 237                  * debounce time. If it writes other than 0 to BTLDset, JIGset
 238                  * muic device will be reset and loose current state.
 239                  */
 240                 ret = regmap_write(info->max77693->regmap_muic,
 241                                   MAX77693_MUIC_REG_CTRL3,
 242                                   time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
 243                 if (ret) {
 244                         dev_err(info->dev, "failed to set ADC debounce time\n");
 245                         return ret;
 246                 }
 247                 break;
 248         default:
 249                 dev_err(info->dev, "invalid ADC debounce time\n");
 250                 return -EINVAL;
 251         }
 252
 253         return 0;
 254 };
 255
 256 /*
 257  * max77693_muic_set_path - Set hardware line according to attached cable
 258  * @info: the instance including private data of max77693 MUIC
 259  * @value: the path according to attached cable
 260  * @attached: the state of cable (true:attached, false:detached)
 261  *
 262  * The max77693 MUIC device share outside H/W line among a varity of cables
 263  * so, this function set internal path of H/W line according to the type of
 264  * attached cable.
 265  */
 266 static int max77693_muic_set_path(struct max77693_muic_info *info,
 267                 u8 val, bool attached)
 268 {
 269         int ret = 0;
 270         unsigned int ctrl1, ctrl2 = 0;
 271
 272         if (attached)
 273                 ctrl1 = val;
 274         else
 275                 ctrl1 = MAX77693_CONTROL1_SW_OPEN;
 276
 277         ret = regmap_update_bits(info->max77693->regmap_muic,
 278                         MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 279         if (ret < 0) {
 280                 dev_err(info->dev, "failed to update MUIC register\n");
 281                 return ret;
 282         }
 283
 284         if (attached)
 285                 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;   /* LowPwr=0, CPEn=1 */
 286         else
 287                 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
 288
 289         ret = regmap_update_bits(info->max77693->regmap_muic,
 290                         MAX77693_MUIC_REG_CTRL2,
 291                         MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
 292                         ctrl2);
 293         if (ret < 0) {
 294                 dev_err(info->dev, "failed to update MUIC register\n");
 295                 return ret;
 296         }
 297
 298         dev_info(info->dev,
 299                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 300                 ctrl1, ctrl2, attached ? "attached" : "detached");
 301
 302         return 0;
 303 }
 304
 305 /*
 306  * max77693_muic_get_cable_type - Return cable type and check cable state
 307  * @info: the instance including private data of max77693 MUIC
 308  * @group: the path according to attached cable
 309  * @attached: store cable state and return
 310  *
 311  * This function check the cable state either attached or detached,
 312  * and then divide precise type of cable according to cable group.
 313  *      - MAX77693_CABLE_GROUP_ADC
 314  *      - MAX77693_CABLE_GROUP_ADC_GND
 315  *      - MAX77693_CABLE_GROUP_CHG
 316  *      - MAX77693_CABLE_GROUP_VBVOLT
 317  */
 318 static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 319                 enum max77693_muic_cable_group group, bool *attached)
 320 {
 321         int cable_type = 0;
 322         int adc;
 323         int adc1k;
 324         int adclow;
 325         int vbvolt;
 326         int chg_type;
 327
 328         switch (group) {
 329         case MAX77693_CABLE_GROUP_ADC:
 330                 /*
 331                  * Read ADC value to check cable type and decide cable state
 332                  * according to cable type
 333                  */
 334                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 335                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 336
 337                 /*
 338                  * Check current cable state/cable type and store cable type
 339                  * (info->prev_cable_type) for handling cable when cable is
 340                  * detached.
 341                  */
 342                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 343                         *attached = false;
 344
 345                         cable_type = info->prev_cable_type;
 346                         info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 347                 } else {
 348                         *attached = true;
 349
 350                         cable_type = info->prev_cable_type = adc;
 351                 }
 352                 break;
 353         case MAX77693_CABLE_GROUP_ADC_GND:
 354                 /*
 355                  * Read ADC value to check cable type and decide cable state
 356                  * according to cable type
 357                  */
 358                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 359                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 360
 361                 /*
 362                  * Check current cable state/cable type and store cable type
 363                  * (info->prev_cable_type/_gnd) for handling cable when cable
 364                  * is detached.
 365                  */
 366                 if (adc == MAX77693_MUIC_ADC_OPEN) {
 367                         *attached = false;
 368
 369                         cable_type = info->prev_cable_type_gnd;
 370                         info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 371                 } else {
 372                         *attached = true;
 373
 374                         adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
 375                         adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
 376                         adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
 377                         adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
 378
 379                         vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 380                         vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 381
 382                         /**
 383                          * [0x1|VBVolt|ADCLow|ADC1K]
 384                          * [0x1|     0|     0|    0] USB_HOST
 385                          * [0x1|     1|     0|    0] USB_HSOT_VB
 386                          * [0x1|     0|     1|    0] Audio Video cable with load
 387                          * [0x1|     0|     1|    1] MHL without charging cable
 388                          * [0x1|     1|     1|    1] MHL with charging cable
 389                          */
 390                         cable_type = ((0x1 << 8)
 391                                         | (vbvolt << 2)
 392                                         | (adclow << 1)
 393                                         | adc1k);
 394
 395                         info->prev_cable_type = adc;
 396                         info->prev_cable_type_gnd = cable_type;
 397                 }
 398
 399                 break;
 400         case MAX77693_CABLE_GROUP_CHG:
 401                 /*
 402                  * Read charger type to check cable type and decide cable state
 403                  * according to type of charger cable.
 404                  */
 405                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 406                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 407
 408                 if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 409                         *attached = false;
 410
 411                         cable_type = info->prev_chg_type;
 412                         info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 413                 } else {
 414                         *attached = true;
 415
 416                         /*
 417                          * Check current cable state/cable type and store cable
 418                          * type(info->prev_chg_type) for handling cable when
 419                          * charger cable is detached.
 420                          */
 421                         cable_type = info->prev_chg_type = chg_type;
 422                 }
 423
 424                 break;
 425         case MAX77693_CABLE_GROUP_VBVOLT:
 426                 /*
 427                  * Read ADC value to check cable type and decide cable state
 428                  * according to cable type
 429                  */
 430                 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 431                 adc >>= MAX77693_STATUS1_ADC_SHIFT;
 432                 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 433                 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 434
 435                 if (adc == MAX77693_MUIC_ADC_OPEN
 436                                 && chg_type == MAX77693_CHARGER_TYPE_NONE)
 437                         *attached = false;
 438                 else
 439                         *attached = true;
 440
 441                 /*
 442                  * Read vbvolt field, if vbvolt is 1,
 443                  * this cable is used for charging.
 444                  */
 445                 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 446                 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 447
 448                 cable_type = vbvolt;
 449                 break;
 450         default:
 451                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 452                 cable_type = -EINVAL;
 453                 break;
 454         }
 455
 456         return cable_type;
 457 }
 458
 459 static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 460                 int cable_type, bool attached)
 461 {
 462         int ret = 0;
 463         int vbvolt;
 464         bool cable_attached;
 465         unsigned int dock_id;
 466
 467         dev_info(info->dev,
 468                 "external connector is %s (adc:0x%02x)\n",
 469                 attached ? "attached" : "detached", cable_type);
 470
 471         switch (cable_type) {
 472         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 473                 /*
 474                  * Check power cable whether attached or detached state.
 475                  * The Dock-Smart device need surely external power supply.
 476                  * If power cable(USB/TA) isn't connected to Dock device,
 477                  * user can't use Dock-Smart for desktop mode.
 478                  */
 479                 vbvolt = max77693_muic_get_cable_type(info,
 480                                 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 481                 if (attached && !vbvolt) {
 482                         dev_warn(info->dev,
 483                                 "Cannot detect external power supply\n");
 484                         return 0;
 485                 }
 486
 487                 /*
 488                  * Notify Dock/MHL state.
 489                  * - Dock device include three type of cable which
 490                  * are HDMI, USB for mouse/keyboard and micro-usb port
 491                  * for USB/TA cable. Dock device need always exteranl
 492                  * power supply(USB/TA cable through micro-usb cable). Dock
 493                  * device support screen output of target to separate
 494                  * monitor and mouse/keyboard for desktop mode.
 495                  *
 496                  * Features of 'USB/TA cable with Dock device'
 497                  * - Support MHL
 498                  * - Support external output feature of audio
 499                  * - Support charging through micro-usb port without data
 500                  *           connection if TA cable is connected to target.
 501                  * - Support charging and data connection through micro-usb port
 502                  *           if USB cable is connected between target and host
 503                  *           device.
 504                  * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 505                  */
 506                 ret = max77693_muic_set_path(info, info->path_usb, attached);
 507                 if (ret < 0)
 508                         return ret;
 509
 510                 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
 511                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 512                 goto out;
 513         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 514                 dock_id = EXTCON_DOCK;
 515                 break;
 516         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 517                 dock_id = EXTCON_DOCK;
 518                 if (!attached) {
 519                         extcon_set_state_sync(info->edev, EXTCON_USB, false);
 520                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 521                                                 false);
 522                 }
 523                 break;
 524         default:
 525                 dev_err(info->dev, "failed to detect %s dock device\n",
 526                         attached ? "attached" : "detached");
 527                 return -EINVAL;
 528         }
 529
 530         /* Dock-Car/Desk/Audio, PATH:AUDIO */
 531         ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 532                                         attached);
 533         if (ret < 0)
 534                 return ret;
 535         extcon_set_state_sync(info->edev, dock_id, attached);
 536
 537 out:
 538         return 0;
 539 }
 540
 541 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 542                 int button_type, bool attached)
 543 {
 544         struct input_dev *dock = info->dock;
 545         unsigned int code;
 546
 547         switch (button_type) {
 548         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 549                 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 550                 /* DOCK_KEY_PREV */
 551                 code = KEY_PREVIOUSSONG;
 552                 break;
 553         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 554                 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 555                 /* DOCK_KEY_NEXT */
 556                 code = KEY_NEXTSONG;
 557                 break;
 558         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 559                 /* DOCK_VOL_DOWN */
 560                 code = KEY_VOLUMEDOWN;
 561                 break;
 562         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 563                 /* DOCK_VOL_UP */
 564                 code = KEY_VOLUMEUP;
 565                 break;
 566         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 567                 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 568                 /* DOCK_KEY_PLAY_PAUSE */
 569                 code = KEY_PLAYPAUSE;
 570                 break;
 571         default:
 572                 dev_err(info->dev,
 573                         "failed to detect %s key (adc:0x%x)\n",
 574                         attached ? "pressed" : "released", button_type);
 575                 return -EINVAL;
 576         }
 577
 578         input_event(dock, EV_KEY, code, attached);
 579         input_sync(dock);
 580
 581         return 0;
 582 }
 583
 584 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 585 {
 586         int cable_type_gnd;
 587         int ret = 0;
 588         bool attached;
 589
 590         cable_type_gnd = max77693_muic_get_cable_type(info,
 591                                 MAX77693_CABLE_GROUP_ADC_GND, &attached);
 592
 593         switch (cable_type_gnd) {
 594         case MAX77693_MUIC_GND_USB_HOST:
 595         case MAX77693_MUIC_GND_USB_HOST_VB:
 596                 /* USB_HOST, PATH: AP_USB */
 597                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
 598                                                 attached);
 599                 if (ret < 0)
 600                         return ret;
 601                 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 602                 break;
 603         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 604                 /* Audio Video Cable with load, PATH:AUDIO */
 605                 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 606                                                 attached);
 607                 if (ret < 0)
 608                         return ret;
 609                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
 610                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 611                                         attached);
 612                 break;
 613         case MAX77693_MUIC_GND_MHL:
 614         case MAX77693_MUIC_GND_MHL_VB:
 615                 /* MHL or MHL with USB/TA cable */
 616                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 617                 break;
 618         default:
 619                 dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 620                         attached ? "attached" : "detached");
 621                 return -EINVAL;
 622         }
 623
 624         return 0;
 625 }
 626
 627 static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 628                 int cable_type, bool attached)
 629 {
 630         int ret = 0;
 631         u8 path = MAX77693_CONTROL1_SW_OPEN;
 632
 633         dev_info(info->dev,
 634                 "external connector is %s (adc:0x%02x)\n",
 635                 attached ? "attached" : "detached", cable_type);
 636
 637         switch (cable_type) {
 638         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 639         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 640                 /* PATH:AP_USB */
 641                 path = MAX77693_CONTROL1_SW_USB;
 642                 break;
 643         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 644         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 645                 /* PATH:AP_UART */
 646                 path = MAX77693_CONTROL1_SW_UART;
 647                 break;
 648         default:
 649                 dev_err(info->dev, "failed to detect %s jig cable\n",
 650                         attached ? "attached" : "detached");
 651                 return -EINVAL;
 652         }
 653
 654         ret = max77693_muic_set_path(info, path, attached);
 655         if (ret < 0)
 656                 return ret;
 657
 658         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
 659
 660         return 0;
 661 }
 662
 663 static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 664 {
 665         int cable_type;
 666         int button_type;
 667         bool attached;
 668         int ret = 0;
 669
 670         /* Check accessory state which is either detached or attached */
 671         cable_type = max77693_muic_get_cable_type(info,
 672                                 MAX77693_CABLE_GROUP_ADC, &attached);
 673
 674         dev_info(info->dev,
 675                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 676                 attached ? "attached" : "detached", cable_type,
 677                 info->prev_cable_type);
 678
 679         switch (cable_type) {
 680         case MAX77693_MUIC_ADC_GROUND:
 681                 /* USB_HOST/MHL/Audio */
 682                 max77693_muic_adc_ground_handler(info);
 683                 break;
 684         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 685         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 686         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 687         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 688                 /* JIG */
 689                 ret = max77693_muic_jig_handler(info, cable_type, attached);
 690                 if (ret < 0)
 691                         return ret;
 692                 break;
 693         case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 694         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 695         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 696                 /*
 697                  * DOCK device
 698                  *
 699                  * The MAX77693 MUIC device can detect total 34 cable type
 700                  * except of charger cable and MUIC device didn't define
 701                  * specfic role of cable in the range of from 0x01 to 0x12
 702                  * of ADC value. So, can use/define cable with no role according
 703                  * to schema of hardware board.
 704                  */
 705                 ret = max77693_muic_dock_handler(info, cable_type, attached);
 706                 if (ret < 0)
 707                         return ret;
 708                 break;
 709         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 710         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 711         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 712         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 713         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 714                 /*
 715                  * Button of DOCK device
 716                  * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 717                  *
 718                  * The MAX77693 MUIC device can detect total 34 cable type
 719                  * except of charger cable and MUIC device didn't define
 720                  * specfic role of cable in the range of from 0x01 to 0x12
 721                  * of ADC value. So, can use/define cable with no role according
 722                  * to schema of hardware board.
 723                  */
 724                 if (attached)
 725                         button_type = info->prev_button_type = cable_type;
 726                 else
 727                         button_type = info->prev_button_type;
 728
 729                 ret = max77693_muic_dock_button_handler(info, button_type,
 730                                                         attached);
 731                 if (ret < 0)
 732                         return ret;
 733                 break;
 734         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 735         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 736         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 737         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 738         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 739         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 740         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 741         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 742         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 743         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 744         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 745         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 746         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 747         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 748         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 749         case MAX77693_MUIC_ADC_UART_CABLE:
 750         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 751         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 752                 /*
 753                  * This accessory isn't used in general case if it is specially
 754                  * needed to detect additional accessory, should implement
 755                  * proper operation when this accessory is attached/detached.
 756                  */
 757                 dev_info(info->dev,
 758                         "accessory is %s but it isn't used (adc:0x%x)\n",
 759                         attached ? "attached" : "detached", cable_type);
 760                 return -EAGAIN;
 761         default:
 762                 dev_err(info->dev,
 763                         "failed to detect %s accessory (adc:0x%x)\n",
 764                         attached ? "attached" : "detached", cable_type);
 765                 return -EINVAL;
 766         }
 767
 768         return 0;
 769 }
 770
 771 static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 772 {
 773         int chg_type;
 774         int cable_type_gnd;
 775         int cable_type;
 776         bool attached;
 777         bool cable_attached;
 778         int ret = 0;
 779
 780         chg_type = max77693_muic_get_cable_type(info,
 781                                 MAX77693_CABLE_GROUP_CHG, &attached);
 782
 783         dev_info(info->dev,
 784                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 785                         attached ? "attached" : "detached",
 786                         chg_type, info->prev_chg_type);
 787
 788         switch (chg_type) {
 789         case MAX77693_CHARGER_TYPE_USB:
 790         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 791         case MAX77693_CHARGER_TYPE_NONE:
 792                 /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 793                 cable_type_gnd = max77693_muic_get_cable_type(info,
 794                                         MAX77693_CABLE_GROUP_ADC_GND,
 795                                         &cable_attached);
 796                 switch (cable_type_gnd) {
 797                 case MAX77693_MUIC_GND_MHL:
 798                 case MAX77693_MUIC_GND_MHL_VB:
 799                         /*
 800                          * MHL cable with USB/TA cable
 801                          * - MHL cable include two port(HDMI line and separate
 802                          * micro-usb port. When the target connect MHL cable,
 803                          * extcon driver check whether USB/TA cable is
 804                          * connected. If USB/TA cable is connected, extcon
 805                          * driver notify state to notifiee for charging battery.
 806                          *
 807                          * Features of 'USB/TA with MHL cable'
 808                          * - Support MHL
 809                          * - Support charging through micro-usb port without
 810                          *   data connection
 811                          */
 812                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 813                                                 attached);
 814                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 815                                                 cable_attached);
 816                         break;
 817                 }
 818
 819                 /* Check MAX77693_CABLE_GROUP_ADC type */
 820                 cable_type = max77693_muic_get_cable_type(info,
 821                                         MAX77693_CABLE_GROUP_ADC,
 822                                         &cable_attached);
 823                 switch (cable_type) {
 824                 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 825                         /*
 826                          * Dock-Audio device with USB/TA cable
 827                          * - Dock device include two port(Dock-Audio and micro-
 828                          * usb port). When the target connect Dock-Audio device,
 829                          * extcon driver check whether USB/TA cable is connected
 830                          * or not. If USB/TA cable is connected, extcon driver
 831                          * notify state to notifiee for charging battery.
 832                          *
 833                          * Features of 'USB/TA cable with Dock-Audio device'
 834                          * - Support external output feature of audio.
 835                          * - Support charging through micro-usb port without
 836                          *   data connection.
 837                          */
 838                         extcon_set_state_sync(info->edev, EXTCON_USB,
 839                                                 attached);
 840                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 841                                                 attached);
 842
 843                         if (!cable_attached)
 844                                 extcon_set_state_sync(info->edev, EXTCON_DOCK,
 845                                                         cable_attached);
 846                         break;
 847                 case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 848                         /*
 849                          * Dock-Smart device with USB/TA cable
 850                          * - Dock-Desk device include three type of cable which
 851                          * are HDMI, USB for mouse/keyboard and micro-usb port
 852                          * for USB/TA cable. Dock-Smart device need always
 853                          * exteranl power supply(USB/TA cable through micro-usb
 854                          * cable). Dock-Smart device support screen output of
 855                          * target to separate monitor and mouse/keyboard for
 856                          * desktop mode.
 857                          *
 858                          * Features of 'USB/TA cable with Dock-Smart device'
 859                          * - Support MHL
 860                          * - Support external output feature of audio
 861                          * - Support charging through micro-usb port without
 862                          *   data connection if TA cable is connected to target.
 863                          * - Support charging and data connection through micro-
 864                          *   usb port if USB cable is connected between target
 865                          *   and host device
 866                          * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 867                          */
 868                         ret = max77693_muic_set_path(info, info->path_usb,
 869                                                     attached);
 870                         if (ret < 0)
 871                                 return ret;
 872
 873                         extcon_set_state_sync(info->edev, EXTCON_DOCK,
 874                                                 attached);
 875                         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 876                                                 attached);
 877                         break;
 878                 }
 879
 880                 /* Check MAX77693_CABLE_GROUP_CHG type */
 881                 switch (chg_type) {
 882                 case MAX77693_CHARGER_TYPE_NONE:
 883                         /*
 884                          * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 885                          * cable is attached, muic device happen below two irq.
 886                          * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 887                          *    MHL/Dock-Audio.
 888                          * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 889                          *    USB/TA cable connected to MHL or Dock-Audio.
 890                          * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 891                          * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 892                          *
 893                          * If user attach MHL (with USB/TA cable and immediately
 894                          * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 895                          * _INT2_CHGTYP irq is happened, USB/TA cable remain
 896                          * connected state to target. But USB/TA cable isn't
 897                          * connected to target. The user be face with unusual
 898                          * action. So, driver should check this situation in
 899                          * spite of, that previous charger type is N/A.
 900                          */
 901                         break;
 902                 case MAX77693_CHARGER_TYPE_USB:
 903                         /* Only USB cable, PATH:AP_USB */
 904                         ret = max77693_muic_set_path(info, info->path_usb,
 905                                                     attached);
 906                         if (ret < 0)
 907                                 return ret;
 908
 909                         extcon_set_state_sync(info->edev, EXTCON_USB,
 910                                                 attached);
 911                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 912                                                 attached);
 913                         break;
 914                 case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 915                         /* Only TA cable */
 916                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 917                                                 attached);
 918                         break;
 919                 }
 920                 break;
 921         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 922                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
 923                                         attached);
 924                 break;
 925         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 926                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
 927                                         attached);
 928                 break;
 929         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 930                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
 931                                         attached);
 932                 break;
 933         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 934                 break;
 935         default:
 936                 dev_err(info->dev,
 937                         "failed to detect %s accessory (chg_type:0x%x)\n",
 938                         attached ? "attached" : "detached", chg_type);
 939                 return -EINVAL;
 940         }
 941
 942         return 0;
 943 }
 944
 945 static void max77693_muic_irq_work(struct work_struct *work)
 946 {
 947         struct max77693_muic_info *info = container_of(work,
 948                         struct max77693_muic_info, irq_work);
 949         int irq_type = -1;
 950         int i, ret = 0;
 951
 952         if (!info->edev)
 953                 return;
 954
 955         mutex_lock(&info->mutex);
 956
 957         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 958                 if (info->irq == muic_irqs[i].virq)
 959                         irq_type = muic_irqs[i].irq;
 960
 961         ret = regmap_bulk_read(info->max77693->regmap_muic,
 962                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
 963         if (ret) {
 964                 dev_err(info->dev, "failed to read MUIC register\n");
 965                 mutex_unlock(&info->mutex);
 966                 return;
 967         }
 968
 969         switch (irq_type) {
 970         case MAX77693_MUIC_IRQ_INT1_ADC:
 971         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 972         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 973         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 974                 /*
 975                  * Handle all of accessory except for
 976                  * type of charger accessory.
 977                  */
 978                 ret = max77693_muic_adc_handler(info);
 979                 break;
 980         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 981         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 982         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 983         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 984         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 985         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 986                 /* Handle charger accessory */
 987                 ret = max77693_muic_chg_handler(info);
 988                 break;
 989         case MAX77693_MUIC_IRQ_INT3_EOC:
 990         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 991         case MAX77693_MUIC_IRQ_INT3_OVP:
 992         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 993         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 994         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 995                 break;
 996         default:
 997                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 998                                 irq_type);
 999                 mutex_unlock(&info->mutex);
1000                 return;
1001         }
1002
1003         if (ret < 0)
1004                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
1005
1006         mutex_unlock(&info->mutex);
1007 }
1008
1009 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1010 {
1011         struct max77693_muic_info *info = data;
1012
1013         info->irq = irq;
1014         schedule_work(&info->irq_work);
1015
1016         return IRQ_HANDLED;
1017 }
1018
1019 static const struct regmap_config max77693_muic_regmap_config = {
1020         .reg_bits = 8,
1021         .val_bits = 8,
1022 };
1023
1024 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1025 {
1026         int ret = 0;
1027         int adc;
1028         int chg_type;
1029         bool attached;
1030
1031         mutex_lock(&info->mutex);
1032
1033         /* Read STATUSx register to detect accessory */
1034         ret = regmap_bulk_read(info->max77693->regmap_muic,
1035                         MAX77693_MUIC_REG_STATUS1, info->status, 2);
1036         if (ret) {
1037                 dev_err(info->dev, "failed to read MUIC register\n");
1038                 mutex_unlock(&info->mutex);
1039                 return ret;
1040         }
1041
1042         adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1043                                         &attached);
1044         if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1045                 ret = max77693_muic_adc_handler(info);
1046                 if (ret < 0) {
1047                         dev_err(info->dev, "Cannot detect accessory\n");
1048                         mutex_unlock(&info->mutex);
1049                         return ret;
1050                 }
1051         }
1052
1053         chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1054                                         &attached);
1055         if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1056                 ret = max77693_muic_chg_handler(info);
1057                 if (ret < 0) {
1058                         dev_err(info->dev, "Cannot detect charger accessory\n");
1059                         mutex_unlock(&info->mutex);
1060                         return ret;
1061                 }
1062         }
1063
1064         mutex_unlock(&info->mutex);
1065
1066         return 0;
1067 }
1068
1069 static void max77693_muic_detect_cable_wq(struct work_struct *work)
1070 {
1071         struct max77693_muic_info *info = container_of(to_delayed_work(work),
1072                                 struct max77693_muic_info, wq_detcable);
1073
1074         max77693_muic_detect_accessory(info);
1075 }
1076
1077 static int max77693_muic_probe(struct platform_device *pdev)
1078 {
1079         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1080         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1081         struct max77693_muic_info *info;
1082         struct max77693_reg_data *init_data;
1083         int num_init_data;
1084         int delay_jiffies;
1085         int ret;
1086         int i;
1087         unsigned int id;
1088
1089         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1090                                    GFP_KERNEL);
1091         if (!info)
1092                 return -ENOMEM;
1093
1094         info->dev = &pdev->dev;
1095         info->max77693 = max77693;
1096         if (info->max77693->regmap_muic) {
1097                 dev_dbg(&pdev->dev, "allocate register map\n");
1098         } else {
1099                 info->max77693->regmap_muic = devm_regmap_init_i2c(
1100                                                 info->max77693->i2c_muic,
1101                                                 &max77693_muic_regmap_config);
1102                 if (IS_ERR(info->max77693->regmap_muic)) {
1103                         ret = PTR_ERR(info->max77693->regmap_muic);
1104                         dev_err(max77693->dev,
1105                                 "failed to allocate register map: %d\n", ret);
1106                         return ret;
1107                 }
1108         }
1109
1110         /* Register input device for button of dock device */
1111         info->dock = devm_input_allocate_device(&pdev->dev);
1112         if (!info->dock) {
1113                 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1114                 return -ENOMEM;
1115         }
1116         info->dock->name = "max77693-muic/dock";
1117         info->dock->phys = "max77693-muic/extcon";
1118         info->dock->dev.parent = &pdev->dev;
1119
1120         __set_bit(EV_REP, info->dock->evbit);
1121
1122         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1123         input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1124         input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1125         input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1126         input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1127
1128         ret = input_register_device(info->dock);
1129         if (ret < 0) {
1130                 dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1131                                 ret);
1132                 return ret;
1133         }
1134
1135         platform_set_drvdata(pdev, info);
1136         mutex_init(&info->mutex);
1137
1138         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1139
1140         /* Support irq domain for MAX77693 MUIC device */
1141         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1142                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1143                 int virq;
1144
1145                 virq = regmap_irq_get_virq(max77693->irq_data_muic,
1146                                         muic_irq->irq);
1147                 if (virq <= 0)
1148                         return -EINVAL;
1149                 muic_irq->virq = virq;
1150
1151                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1152                                 max77693_muic_irq_handler,
1153                                 IRQF_NO_SUSPEND,
1154                                 muic_irq->name, info);
1155                 if (ret) {
1156                         dev_err(&pdev->dev,
1157                                 "failed: irq request (IRQ: %d, error :%d)\n",
1158                                 muic_irq->irq, ret);
1159                         return ret;
1160                 }
1161         }
1162
1163         /* Initialize extcon device */
1164         info->edev = devm_extcon_dev_allocate(&pdev->dev,
1165                                               max77693_extcon_cable);
1166         if (IS_ERR(info->edev)) {
1167                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1168                 return -ENOMEM;
1169         }
1170
1171         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1172         if (ret) {
1173                 dev_err(&pdev->dev, "failed to register extcon device\n");
1174                 return ret;
1175         }
1176
1177         /* Initialize MUIC register by using platform data or default data */
1178         if (pdata && pdata->muic_data) {
1179                 init_data = pdata->muic_data->init_data;
1180                 num_init_data = pdata->muic_data->num_init_data;
1181         } else {
1182                 init_data = default_init_data;
1183                 num_init_data = ARRAY_SIZE(default_init_data);
1184         }
1185
1186         for (i = 0; i < num_init_data; i++) {
1187                 regmap_write(info->max77693->regmap_muic,
1188                                 init_data[i].addr,
1189                                 init_data[i].data);
1190         }
1191
1192         if (pdata && pdata->muic_data) {
1193                 struct max77693_muic_platform_data *muic_pdata
1194                                                    = pdata->muic_data;
1195
1196                 /*
1197                  * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1198                  * h/w path of COMP2/COMN1 on CONTROL1 register.
1199                  */
1200                 if (muic_pdata->path_uart)
1201                         info->path_uart = muic_pdata->path_uart;
1202                 else
1203                         info->path_uart = MAX77693_CONTROL1_SW_UART;
1204
1205                 if (muic_pdata->path_usb)
1206                         info->path_usb = muic_pdata->path_usb;
1207                 else
1208                         info->path_usb = MAX77693_CONTROL1_SW_USB;
1209
1210                 /*
1211                  * Default delay time for detecting cable state
1212                  * after certain time.
1213                  */
1214                 if (muic_pdata->detcable_delay_ms)
1215                         delay_jiffies =
1216                                 msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1217                 else
1218                         delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1219         } else {
1220                 info->path_usb = MAX77693_CONTROL1_SW_USB;
1221                 info->path_uart = MAX77693_CONTROL1_SW_UART;
1222                 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1223         }
1224
1225         /* Set initial path for UART */
1226          max77693_muic_set_path(info, info->path_uart, true);
1227
1228         /* Check revision number of MUIC device*/
1229         ret = regmap_read(info->max77693->regmap_muic,
1230                         MAX77693_MUIC_REG_ID, &id);
1231         if (ret < 0) {
1232                 dev_err(&pdev->dev, "failed to read revision number\n");
1233                 return ret;
1234         }
1235         dev_info(info->dev, "device ID : 0x%x\n", id);
1236
1237         /* Set ADC debounce time */
1238         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1239
1240         /*
1241          * Detect accessory after completing the initialization of platform
1242          *
1243          * - Use delayed workqueue to detect cable state and then
1244          * notify cable state to notifiee/platform through uevent.
1245          * After completing the booting of platform, the extcon provider
1246          * driver should notify cable state to upper layer.
1247          */
1248         INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1249         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1250                         delay_jiffies);
1251
1252         return ret;
1253 }
1254
1255 static int max77693_muic_remove(struct platform_device *pdev)
1256 {
1257         struct max77693_muic_info *info = platform_get_drvdata(pdev);
1258
1259         cancel_work_sync(&info->irq_work);
1260         input_unregister_device(info->dock);
1261
1262         return 0;
1263 }
1264
1265 static struct platform_driver max77693_muic_driver = {
1266         .driver         = {
1267                 .name   = DEV_NAME,
1268         },
1269         .probe          = max77693_muic_probe,
1270         .remove         = max77693_muic_remove,
1271 };
1272
1273 module_platform_driver(max77693_muic_driver);
1274
1275 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1276 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1277 MODULE_LICENSE("GPL");
1278 MODULE_ALIAS("platform:max77693-muic");