drivers/extcon/extcon-max77843.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // extcon-max77843.c - Maxim MAX77843 extcon driver to support
   4 //                      MUIC(Micro USB Interface Controller)
   5 //
   6 // Copyright (C) 2015 Samsung Electronics
   7 // Author: Jaewon Kim <jaewon02.kim@samsung.com>
   8
   9 #include <linux/extcon-provider.h>
  10 #include <linux/i2c.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/kernel.h>
  13 #include <linux/mfd/max77693-common.h>
  14 #include <linux/mfd/max77843-private.h>
  15 #include <linux/module.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/workqueue.h>
  18
  19 #define DELAY_MS_DEFAULT                15000   /* unit: millisecond */
  20
  21 enum max77843_muic_status {
  22         MAX77843_MUIC_STATUS1 = 0,
  23         MAX77843_MUIC_STATUS2,
  24         MAX77843_MUIC_STATUS3,
  25
  26         MAX77843_MUIC_STATUS_NUM,
  27 };
  28
  29 struct max77843_muic_info {
  30         struct device *dev;
  31         struct max77693_dev *max77843;
  32         struct extcon_dev *edev;
  33
  34         struct mutex mutex;
  35         struct work_struct irq_work;
  36         struct delayed_work wq_detcable;
  37
  38         u8 status[MAX77843_MUIC_STATUS_NUM];
  39         int prev_cable_type;
  40         int prev_chg_type;
  41         int prev_gnd_type;
  42
  43         bool irq_adc;
  44         bool irq_chg;
  45 };
  46
  47 enum max77843_muic_cable_group {
  48         MAX77843_CABLE_GROUP_ADC = 0,
  49         MAX77843_CABLE_GROUP_ADC_GND,
  50         MAX77843_CABLE_GROUP_CHG,
  51 };
  52
  53 enum max77843_muic_adc_debounce_time {
  54         MAX77843_DEBOUNCE_TIME_5MS = 0,
  55         MAX77843_DEBOUNCE_TIME_10MS,
  56         MAX77843_DEBOUNCE_TIME_25MS,
  57         MAX77843_DEBOUNCE_TIME_38_62MS,
  58 };
  59
  60 /* Define accessory cable type */
  61 enum max77843_muic_accessory_type {
  62         MAX77843_MUIC_ADC_GROUND = 0,
  63         MAX77843_MUIC_ADC_SEND_END_BUTTON,
  64         MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
  65         MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
  66         MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
  67         MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
  68         MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
  69         MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
  70         MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
  71         MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
  72         MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
  73         MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
  74         MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
  75         MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
  76         MAX77843_MUIC_ADC_RESERVED_ACC_1,
  77         MAX77843_MUIC_ADC_RESERVED_ACC_2,
  78         MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */
  79         MAX77843_MUIC_ADC_RESERVED_ACC_4,
  80         MAX77843_MUIC_ADC_RESERVED_ACC_5,
  81         MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
  82         MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
  83         MAX77843_MUIC_ADC_TTY_CONVERTER,
  84         MAX77843_MUIC_ADC_UART_CABLE,
  85         MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
  86         MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
  87         MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
  88         MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
  89         MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
  90         MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
  91         MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
  92         MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
  93         MAX77843_MUIC_ADC_OPEN,
  94
  95         /*
  96          * The below accessories should check
  97          * not only ADC value but also ADC1K and VBVolt value.
  98          */
  99                                                 /* Offset|ADC1K|VBVolt| */
 100         MAX77843_MUIC_GND_USB_HOST = 0x100,     /*    0x1|    0|     0| */
 101         MAX77843_MUIC_GND_USB_HOST_VB = 0x101,  /*    0x1|    0|     1| */
 102         MAX77843_MUIC_GND_MHL = 0x102,          /*    0x1|    1|     0| */
 103         MAX77843_MUIC_GND_MHL_VB = 0x103,       /*    0x1|    1|     1| */
 104 };
 105
 106 /* Define charger cable type */
 107 enum max77843_muic_charger_type {
 108         MAX77843_MUIC_CHG_NONE = 0,
 109         MAX77843_MUIC_CHG_USB,
 110         MAX77843_MUIC_CHG_DOWNSTREAM,
 111         MAX77843_MUIC_CHG_DEDICATED,
 112         MAX77843_MUIC_CHG_SPECIAL_500MA,
 113         MAX77843_MUIC_CHG_SPECIAL_1A,
 114         MAX77843_MUIC_CHG_SPECIAL_BIAS,
 115         MAX77843_MUIC_CHG_RESERVED,
 116         MAX77843_MUIC_CHG_GND,
 117         MAX77843_MUIC_CHG_DOCK,
 118 };
 119
 120 static const unsigned int max77843_extcon_cable[] = {
 121         EXTCON_USB,
 122         EXTCON_USB_HOST,
 123         EXTCON_CHG_USB_SDP,
 124         EXTCON_CHG_USB_DCP,
 125         EXTCON_CHG_USB_CDP,
 126         EXTCON_CHG_USB_FAST,
 127         EXTCON_CHG_USB_SLOW,
 128         EXTCON_DISP_MHL,
 129         EXTCON_DOCK,
 130         EXTCON_JIG,
 131         EXTCON_NONE,
 132 };
 133
 134 struct max77843_muic_irq {
 135         unsigned int irq;
 136         const char *name;
 137         unsigned int virq;
 138 };
 139
 140 static struct max77843_muic_irq max77843_muic_irqs[] = {
 141         { MAX77843_MUIC_IRQ_INT1_ADC,           "MUIC-ADC" },
 142         { MAX77843_MUIC_IRQ_INT1_ADCERROR,      "MUIC-ADC_ERROR" },
 143         { MAX77843_MUIC_IRQ_INT1_ADC1K,         "MUIC-ADC1K" },
 144         { MAX77843_MUIC_IRQ_INT2_CHGTYP,        "MUIC-CHGTYP" },
 145         { MAX77843_MUIC_IRQ_INT2_CHGDETRUN,     "MUIC-CHGDETRUN" },
 146         { MAX77843_MUIC_IRQ_INT2_DCDTMR,        "MUIC-DCDTMR" },
 147         { MAX77843_MUIC_IRQ_INT2_DXOVP,         "MUIC-DXOVP" },
 148         { MAX77843_MUIC_IRQ_INT2_VBVOLT,        "MUIC-VBVOLT" },
 149         { MAX77843_MUIC_IRQ_INT3_VBADC,         "MUIC-VBADC" },
 150         { MAX77843_MUIC_IRQ_INT3_VDNMON,        "MUIC-VDNMON" },
 151         { MAX77843_MUIC_IRQ_INT3_DNRES,         "MUIC-DNRES" },
 152         { MAX77843_MUIC_IRQ_INT3_MPNACK,        "MUIC-MPNACK"},
 153         { MAX77843_MUIC_IRQ_INT3_MRXBUFOW,      "MUIC-MRXBUFOW"},
 154         { MAX77843_MUIC_IRQ_INT3_MRXTRF,        "MUIC-MRXTRF"},
 155         { MAX77843_MUIC_IRQ_INT3_MRXPERR,       "MUIC-MRXPERR"},
 156         { MAX77843_MUIC_IRQ_INT3_MRXRDY,        "MUIC-MRXRDY"},
 157 };
 158
 159 static const struct regmap_config max77843_muic_regmap_config = {
 160         .reg_bits       = 8,
 161         .val_bits       = 8,
 162         .max_register   = MAX77843_MUIC_REG_END,
 163 };
 164
 165 static const struct regmap_irq max77843_muic_irq[] = {
 166         /* INT1 interrupt */
 167         { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
 168         { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
 169         { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
 170
 171         /* INT2 interrupt */
 172         { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
 173         { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
 174         { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
 175         { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
 176         { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
 177
 178         /* INT3 interrupt */
 179         { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
 180         { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
 181         { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
 182         { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
 183         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
 184         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
 185         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
 186         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
 187 };
 188
 189 static const struct regmap_irq_chip max77843_muic_irq_chip = {
 190         .name           = "max77843-muic",
 191         .status_base    = MAX77843_MUIC_REG_INT1,
 192         .mask_base      = MAX77843_MUIC_REG_INTMASK1,
 193         .mask_invert    = true,
 194         .num_regs       = 3,
 195         .irqs           = max77843_muic_irq,
 196         .num_irqs       = ARRAY_SIZE(max77843_muic_irq),
 197 };
 198
 199 static int max77843_muic_set_path(struct max77843_muic_info *info,
 200                 u8 val, bool attached, bool nobccomp)
 201 {
 202         struct max77693_dev *max77843 = info->max77843;
 203         int ret = 0;
 204         unsigned int ctrl1, ctrl2;
 205
 206         if (attached)
 207                 ctrl1 = val;
 208         else
 209                 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
 210         if (nobccomp) {
 211                 /* Disable BC1.2 protocol and force manual switch control */
 212                 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;
 213         }
 214
 215         ret = regmap_update_bits(max77843->regmap_muic,
 216                         MAX77843_MUIC_REG_CONTROL1,
 217                         MAX77843_MUIC_CONTROL1_COM_SW |
 218                                 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,
 219                         ctrl1);
 220         if (ret < 0) {
 221                 dev_err(info->dev, "Cannot switch MUIC port\n");
 222                 return ret;
 223         }
 224
 225         if (attached)
 226                 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
 227         else
 228                 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
 229
 230         ret = regmap_update_bits(max77843->regmap_muic,
 231                         MAX77843_MUIC_REG_CONTROL2,
 232                         MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
 233                         MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
 234         if (ret < 0) {
 235                 dev_err(info->dev, "Cannot update lowpower mode\n");
 236                 return ret;
 237         }
 238
 239         dev_dbg(info->dev,
 240                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 241                 ctrl1, ctrl2, attached ? "attached" : "detached");
 242
 243         return 0;
 244 }
 245
 246 static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,
 247                  bool on)
 248 {
 249         struct max77693_dev *max77843 = info->max77843;
 250         unsigned int cnfg00;
 251
 252         if (on)
 253                 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;
 254         else
 255                 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;
 256
 257         regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,
 258                            MAX77843_CHG_MODE_MASK, cnfg00);
 259 }
 260
 261 static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
 262                 enum max77843_muic_cable_group group, bool *attached)
 263 {
 264         int adc, chg_type, cable_type, gnd_type;
 265
 266         adc = info->status[MAX77843_MUIC_STATUS1] &
 267                         MAX77843_MUIC_STATUS1_ADC_MASK;
 268         adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
 269
 270         switch (group) {
 271         case MAX77843_CABLE_GROUP_ADC:
 272                 if (adc == MAX77843_MUIC_ADC_OPEN) {
 273                         *attached = false;
 274                         cable_type = info->prev_cable_type;
 275                         info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
 276                 } else {
 277                         *attached = true;
 278                         cable_type = info->prev_cable_type = adc;
 279                 }
 280                 break;
 281         case MAX77843_CABLE_GROUP_CHG:
 282                 chg_type = info->status[MAX77843_MUIC_STATUS2] &
 283                                 MAX77843_MUIC_STATUS2_CHGTYP_MASK;
 284
 285                 /* Check GROUND accessory with charger cable */
 286                 if (adc == MAX77843_MUIC_ADC_GROUND) {
 287                         if (chg_type == MAX77843_MUIC_CHG_NONE) {
 288                                 /*
 289                                  * The following state when charger cable is
 290                                  * disconnected but the GROUND accessory still
 291                                  * connected.
 292                                  */
 293                                 *attached = false;
 294                                 cable_type = info->prev_chg_type;
 295                                 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
 296                         } else {
 297
 298                                 /*
 299                                  * The following state when charger cable is
 300                                  * connected on the GROUND accessory.
 301                                  */
 302                                 *attached = true;
 303                                 cable_type = MAX77843_MUIC_CHG_GND;
 304                                 info->prev_chg_type = MAX77843_MUIC_CHG_GND;
 305                         }
 306                         break;
 307                 }
 308
 309                 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */
 310                         if (chg_type == MAX77843_MUIC_CHG_NONE) {
 311                                 *attached = false;
 312                                 cable_type = info->prev_chg_type;
 313                                 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
 314                         } else {
 315                                 *attached = true;
 316                                 cable_type = MAX77843_MUIC_CHG_DOCK;
 317                                 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;
 318                         }
 319                         break;
 320                 }
 321
 322                 if (chg_type == MAX77843_MUIC_CHG_NONE) {
 323                         *attached = false;
 324                         cable_type = info->prev_chg_type;
 325                         info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
 326                 } else {
 327                         *attached = true;
 328                         cable_type = info->prev_chg_type = chg_type;
 329                 }
 330                 break;
 331         case MAX77843_CABLE_GROUP_ADC_GND:
 332                 if (adc == MAX77843_MUIC_ADC_OPEN) {
 333                         *attached = false;
 334                         cable_type = info->prev_gnd_type;
 335                         info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
 336                 } else {
 337                         *attached = true;
 338
 339                         /*
 340                          * Offset|ADC1K|VBVolt|
 341                          *    0x1|    0|     0| USB-HOST
 342                          *    0x1|    0|     1| USB-HOST with VB
 343                          *    0x1|    1|     0| MHL
 344                          *    0x1|    1|     1| MHL with VB
 345                          */
 346                         /* Get ADC1K register bit */
 347                         gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
 348                                         MAX77843_MUIC_STATUS1_ADC1K_MASK);
 349
 350                         /* Get VBVolt register bit */
 351                         gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
 352                                         MAX77843_MUIC_STATUS2_VBVOLT_MASK);
 353                         gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
 354
 355                         /* Offset of GND cable */
 356                         gnd_type |= MAX77843_MUIC_GND_USB_HOST;
 357                         cable_type = info->prev_gnd_type = gnd_type;
 358                 }
 359                 break;
 360         default:
 361                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 362                 cable_type = -EINVAL;
 363                 break;
 364         }
 365
 366         return cable_type;
 367 }
 368
 369 static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
 370 {
 371         int ret, gnd_cable_type;
 372         bool attached;
 373
 374         gnd_cable_type = max77843_muic_get_cable_type(info,
 375                         MAX77843_CABLE_GROUP_ADC_GND, &attached);
 376         dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
 377                         attached ? "attached" : "detached", gnd_cable_type);
 378
 379         switch (gnd_cable_type) {
 380         case MAX77843_MUIC_GND_USB_HOST:
 381         case MAX77843_MUIC_GND_USB_HOST_VB:
 382                 ret = max77843_muic_set_path(info,
 383                                              MAX77843_MUIC_CONTROL1_SW_USB,
 384                                              attached, false);
 385                 if (ret < 0)
 386                         return ret;
 387
 388                 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 389                 max77843_charger_set_otg_vbus(info, attached);
 390                 break;
 391         case MAX77843_MUIC_GND_MHL_VB:
 392         case MAX77843_MUIC_GND_MHL:
 393                 ret = max77843_muic_set_path(info,
 394                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 395                                              attached, false);
 396                 if (ret < 0)
 397                         return ret;
 398
 399                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 400                 break;
 401         default:
 402                 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
 403                         attached ? "attached" : "detached", gnd_cable_type);
 404                 return -EINVAL;
 405         }
 406
 407         return 0;
 408 }
 409
 410 static int max77843_muic_jig_handler(struct max77843_muic_info *info,
 411                 int cable_type, bool attached)
 412 {
 413         int ret;
 414         u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
 415
 416         dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
 417                         attached ? "attached" : "detached", cable_type);
 418
 419         switch (cable_type) {
 420         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
 421         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
 422                 path = MAX77843_MUIC_CONTROL1_SW_USB;
 423                 break;
 424         case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
 425                 path = MAX77843_MUIC_CONTROL1_SW_UART;
 426                 break;
 427         default:
 428                 return -EINVAL;
 429         }
 430
 431         ret = max77843_muic_set_path(info, path, attached, false);
 432         if (ret < 0)
 433                 return ret;
 434
 435         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
 436
 437         return 0;
 438 }
 439
 440 static int max77843_muic_dock_handler(struct max77843_muic_info *info,
 441                 bool attached)
 442 {
 443         int ret;
 444
 445         dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",
 446                         attached ? "attached" : "detached");
 447
 448         ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,
 449                                      attached, attached);
 450         if (ret < 0)
 451                 return ret;
 452
 453         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 454         extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 455         extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
 456
 457         return 0;
 458 }
 459
 460 static int max77843_muic_adc_handler(struct max77843_muic_info *info)
 461 {
 462         int ret, cable_type;
 463         bool attached;
 464
 465         cable_type = max77843_muic_get_cable_type(info,
 466                         MAX77843_CABLE_GROUP_ADC, &attached);
 467
 468         dev_dbg(info->dev,
 469                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 470                 attached ? "attached" : "detached", cable_type,
 471                 info->prev_cable_type);
 472
 473         switch (cable_type) {
 474         case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */
 475                 ret = max77843_muic_dock_handler(info, attached);
 476                 if (ret < 0)
 477                         return ret;
 478                 break;
 479         case MAX77843_MUIC_ADC_GROUND:
 480                 ret = max77843_muic_adc_gnd_handler(info);
 481                 if (ret < 0)
 482                         return ret;
 483                 break;
 484         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
 485         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
 486         case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
 487                 ret = max77843_muic_jig_handler(info, cable_type, attached);
 488                 if (ret < 0)
 489                         return ret;
 490                 break;
 491         case MAX77843_MUIC_ADC_SEND_END_BUTTON:
 492         case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
 493         case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
 494         case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
 495         case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
 496         case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
 497         case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
 498         case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
 499         case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
 500         case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
 501         case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
 502         case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
 503         case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
 504         case MAX77843_MUIC_ADC_RESERVED_ACC_1:
 505         case MAX77843_MUIC_ADC_RESERVED_ACC_2:
 506         case MAX77843_MUIC_ADC_RESERVED_ACC_4:
 507         case MAX77843_MUIC_ADC_RESERVED_ACC_5:
 508         case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
 509         case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
 510         case MAX77843_MUIC_ADC_TTY_CONVERTER:
 511         case MAX77843_MUIC_ADC_UART_CABLE:
 512         case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
 513         case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
 514         case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
 515         case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
 516         case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
 517         case MAX77843_MUIC_ADC_OPEN:
 518                 dev_err(info->dev,
 519                         "accessory is %s but it isn't used (adc:0x%x)\n",
 520                         attached ? "attached" : "detached", cable_type);
 521                 return -EAGAIN;
 522         default:
 523                 dev_err(info->dev,
 524                         "failed to detect %s accessory (adc:0x%x)\n",
 525                         attached ? "attached" : "detached", cable_type);
 526                 return -EINVAL;
 527         }
 528
 529         return 0;
 530 }
 531
 532 static int max77843_muic_chg_handler(struct max77843_muic_info *info)
 533 {
 534         int ret, chg_type, gnd_type;
 535         bool attached;
 536
 537         chg_type = max77843_muic_get_cable_type(info,
 538                         MAX77843_CABLE_GROUP_CHG, &attached);
 539
 540         dev_dbg(info->dev,
 541                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 542                 attached ? "attached" : "detached",
 543                 chg_type, info->prev_chg_type);
 544
 545         switch (chg_type) {
 546         case MAX77843_MUIC_CHG_USB:
 547                 ret = max77843_muic_set_path(info,
 548                                              MAX77843_MUIC_CONTROL1_SW_USB,
 549                                              attached, false);
 550                 if (ret < 0)
 551                         return ret;
 552
 553                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
 554                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 555                                         attached);
 556                 break;
 557         case MAX77843_MUIC_CHG_DOWNSTREAM:
 558                 ret = max77843_muic_set_path(info,
 559                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 560                                              attached, false);
 561                 if (ret < 0)
 562                         return ret;
 563
 564                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
 565                                         attached);
 566                 break;
 567         case MAX77843_MUIC_CHG_DEDICATED:
 568                 ret = max77843_muic_set_path(info,
 569                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 570                                              attached, false);
 571                 if (ret < 0)
 572                         return ret;
 573
 574                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 575                                         attached);
 576                 break;
 577         case MAX77843_MUIC_CHG_SPECIAL_500MA:
 578                 ret = max77843_muic_set_path(info,
 579                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 580                                              attached, false);
 581                 if (ret < 0)
 582                         return ret;
 583
 584                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
 585                                         attached);
 586                 break;
 587         case MAX77843_MUIC_CHG_SPECIAL_1A:
 588                 ret = max77843_muic_set_path(info,
 589                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 590                                              attached, false);
 591                 if (ret < 0)
 592                         return ret;
 593
 594                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
 595                                         attached);
 596                 break;
 597         case MAX77843_MUIC_CHG_GND:
 598                 gnd_type = max77843_muic_get_cable_type(info,
 599                                 MAX77843_CABLE_GROUP_ADC_GND, &attached);
 600
 601                 /* Charger cable on MHL accessory is attach or detach */
 602                 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
 603                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 604                                                 true);
 605                 else if (gnd_type == MAX77843_MUIC_GND_MHL)
 606                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 607                                                 false);
 608                 break;
 609         case MAX77843_MUIC_CHG_DOCK:
 610                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
 611                 break;
 612         case MAX77843_MUIC_CHG_NONE:
 613                 break;
 614         default:
 615                 dev_err(info->dev,
 616                         "failed to detect %s accessory (chg_type:0x%x)\n",
 617                         attached ? "attached" : "detached", chg_type);
 618
 619                 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
 620                                        attached, false);
 621                 return -EINVAL;
 622         }
 623
 624         return 0;
 625 }
 626
 627 static void max77843_muic_irq_work(struct work_struct *work)
 628 {
 629         struct max77843_muic_info *info = container_of(work,
 630                         struct max77843_muic_info, irq_work);
 631         struct max77693_dev *max77843 = info->max77843;
 632         int ret = 0;
 633
 634         mutex_lock(&info->mutex);
 635
 636         ret = regmap_bulk_read(max77843->regmap_muic,
 637                         MAX77843_MUIC_REG_STATUS1, info->status,
 638                         MAX77843_MUIC_STATUS_NUM);
 639         if (ret) {
 640                 dev_err(info->dev, "Cannot read STATUS registers\n");
 641                 mutex_unlock(&info->mutex);
 642                 return;
 643         }
 644
 645         if (info->irq_adc) {
 646                 ret = max77843_muic_adc_handler(info);
 647                 if (ret)
 648                         dev_err(info->dev, "Unknown cable type\n");
 649                 info->irq_adc = false;
 650         }
 651
 652         if (info->irq_chg) {
 653                 ret = max77843_muic_chg_handler(info);
 654                 if (ret)
 655                         dev_err(info->dev, "Unknown charger type\n");
 656                 info->irq_chg = false;
 657         }
 658
 659         mutex_unlock(&info->mutex);
 660 }
 661
 662 static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
 663 {
 664         struct max77843_muic_info *info = data;
 665         int i, irq_type = -1;
 666
 667         for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
 668                 if (irq == max77843_muic_irqs[i].virq)
 669                         irq_type = max77843_muic_irqs[i].irq;
 670
 671         switch (irq_type) {
 672         case MAX77843_MUIC_IRQ_INT1_ADC:
 673         case MAX77843_MUIC_IRQ_INT1_ADCERROR:
 674         case MAX77843_MUIC_IRQ_INT1_ADC1K:
 675                 info->irq_adc = true;
 676                 break;
 677         case MAX77843_MUIC_IRQ_INT2_CHGTYP:
 678         case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
 679         case MAX77843_MUIC_IRQ_INT2_DCDTMR:
 680         case MAX77843_MUIC_IRQ_INT2_DXOVP:
 681         case MAX77843_MUIC_IRQ_INT2_VBVOLT:
 682                 info->irq_chg = true;
 683                 break;
 684         case MAX77843_MUIC_IRQ_INT3_VBADC:
 685         case MAX77843_MUIC_IRQ_INT3_VDNMON:
 686         case MAX77843_MUIC_IRQ_INT3_DNRES:
 687         case MAX77843_MUIC_IRQ_INT3_MPNACK:
 688         case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
 689         case MAX77843_MUIC_IRQ_INT3_MRXTRF:
 690         case MAX77843_MUIC_IRQ_INT3_MRXPERR:
 691         case MAX77843_MUIC_IRQ_INT3_MRXRDY:
 692                 break;
 693         default:
 694                 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
 695                 break;
 696         }
 697
 698         schedule_work(&info->irq_work);
 699
 700         return IRQ_HANDLED;
 701 }
 702
 703 static void max77843_muic_detect_cable_wq(struct work_struct *work)
 704 {
 705         struct max77843_muic_info *info = container_of(to_delayed_work(work),
 706                         struct max77843_muic_info, wq_detcable);
 707         struct max77693_dev *max77843 = info->max77843;
 708         int chg_type, adc, ret;
 709         bool attached;
 710
 711         mutex_lock(&info->mutex);
 712
 713         ret = regmap_bulk_read(max77843->regmap_muic,
 714                         MAX77843_MUIC_REG_STATUS1, info->status,
 715                         MAX77843_MUIC_STATUS_NUM);
 716         if (ret) {
 717                 dev_err(info->dev, "Cannot read STATUS registers\n");
 718                 goto err_cable_wq;
 719         }
 720
 721         adc = max77843_muic_get_cable_type(info,
 722                         MAX77843_CABLE_GROUP_ADC, &attached);
 723         if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
 724                 ret = max77843_muic_adc_handler(info);
 725                 if (ret < 0) {
 726                         dev_err(info->dev, "Cannot detect accessory\n");
 727                         goto err_cable_wq;
 728                 }
 729         }
 730
 731         chg_type = max77843_muic_get_cable_type(info,
 732                         MAX77843_CABLE_GROUP_CHG, &attached);
 733         if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
 734                 ret = max77843_muic_chg_handler(info);
 735                 if (ret < 0) {
 736                         dev_err(info->dev, "Cannot detect charger accessory\n");
 737                         goto err_cable_wq;
 738                 }
 739         }
 740
 741 err_cable_wq:
 742         mutex_unlock(&info->mutex);
 743 }
 744
 745 static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
 746                 enum max77843_muic_adc_debounce_time time)
 747 {
 748         struct max77693_dev *max77843 = info->max77843;
 749         int ret;
 750
 751         switch (time) {
 752         case MAX77843_DEBOUNCE_TIME_5MS:
 753         case MAX77843_DEBOUNCE_TIME_10MS:
 754         case MAX77843_DEBOUNCE_TIME_25MS:
 755         case MAX77843_DEBOUNCE_TIME_38_62MS:
 756                 ret = regmap_update_bits(max77843->regmap_muic,
 757                                 MAX77843_MUIC_REG_CONTROL4,
 758                                 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
 759                                 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
 760                 if (ret < 0) {
 761                         dev_err(info->dev, "Cannot write MUIC regmap\n");
 762                         return ret;
 763                 }
 764                 break;
 765         default:
 766                 dev_err(info->dev, "Invalid ADC debounce time\n");
 767                 return -EINVAL;
 768         }
 769
 770         return 0;
 771 }
 772
 773 static int max77843_init_muic_regmap(struct max77693_dev *max77843)
 774 {
 775         int ret;
 776
 777         max77843->i2c_muic = i2c_new_dummy_device(max77843->i2c->adapter,
 778                         I2C_ADDR_MUIC);
 779         if (IS_ERR(max77843->i2c_muic)) {
 780                 dev_err(&max77843->i2c->dev,
 781                                 "Cannot allocate I2C device for MUIC\n");
 782                 return PTR_ERR(max77843->i2c_muic);
 783         }
 784
 785         i2c_set_clientdata(max77843->i2c_muic, max77843);
 786
 787         max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
 788                         &max77843_muic_regmap_config);
 789         if (IS_ERR(max77843->regmap_muic)) {
 790                 ret = PTR_ERR(max77843->regmap_muic);
 791                 goto err_muic_i2c;
 792         }
 793
 794         ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
 795                         IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
 796                         0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
 797         if (ret < 0) {
 798                 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
 799                 goto err_muic_i2c;
 800         }
 801
 802         return 0;
 803
 804 err_muic_i2c:
 805         i2c_unregister_device(max77843->i2c_muic);
 806
 807         return ret;
 808 }
 809
 810 static int max77843_muic_probe(struct platform_device *pdev)
 811 {
 812         struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
 813         struct max77843_muic_info *info;
 814         unsigned int id;
 815         int cable_type;
 816         bool attached;
 817         int i, ret;
 818
 819         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 820         if (!info)
 821                 return -ENOMEM;
 822
 823         info->dev = &pdev->dev;
 824         info->max77843 = max77843;
 825
 826         platform_set_drvdata(pdev, info);
 827         mutex_init(&info->mutex);
 828
 829         /* Initialize i2c and regmap */
 830         ret = max77843_init_muic_regmap(max77843);
 831         if (ret) {
 832                 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
 833                 return ret;
 834         }
 835
 836         /* Turn off auto detection configuration */
 837         ret = regmap_update_bits(max77843->regmap_muic,
 838                         MAX77843_MUIC_REG_CONTROL4,
 839                         MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
 840                         MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
 841                         CONTROL4_AUTO_DISABLE);
 842
 843         /* Initialize extcon device */
 844         info->edev = devm_extcon_dev_allocate(&pdev->dev,
 845                         max77843_extcon_cable);
 846         if (IS_ERR(info->edev)) {
 847                 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
 848                 ret = PTR_ERR(info->edev);
 849                 goto err_muic_irq;
 850         }
 851
 852         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
 853         if (ret) {
 854                 dev_err(&pdev->dev, "Failed to register extcon device\n");
 855                 goto err_muic_irq;
 856         }
 857
 858         /* Set ADC debounce time */
 859         max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
 860
 861         /* Set initial path for UART when JIG is connected to get serial logs */
 862         ret = regmap_bulk_read(max77843->regmap_muic,
 863                         MAX77843_MUIC_REG_STATUS1, info->status,
 864                         MAX77843_MUIC_STATUS_NUM);
 865         if (ret) {
 866                 dev_err(info->dev, "Cannot read STATUS registers\n");
 867                 goto err_muic_irq;
 868         }
 869         cable_type = max77843_muic_get_cable_type(info, MAX77843_CABLE_GROUP_ADC,
 870                                          &attached);
 871         if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF)
 872                 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART,
 873                                        true, false);
 874
 875         /* Check revision number of MUIC device */
 876         ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
 877         if (ret < 0) {
 878                 dev_err(&pdev->dev, "Failed to read revision number\n");
 879                 goto err_muic_irq;
 880         }
 881         dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
 882
 883         /* Support virtual irq domain for max77843 MUIC device */
 884         INIT_WORK(&info->irq_work, max77843_muic_irq_work);
 885
 886         /* Clear IRQ bits before request IRQs */
 887         ret = regmap_bulk_read(max77843->regmap_muic,
 888                         MAX77843_MUIC_REG_INT1, info->status,
 889                         MAX77843_MUIC_STATUS_NUM);
 890         if (ret) {
 891                 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
 892                 goto err_muic_irq;
 893         }
 894
 895         for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
 896                 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
 897                 int virq = 0;
 898
 899                 virq = regmap_irq_get_virq(max77843->irq_data_muic,
 900                                 muic_irq->irq);
 901                 if (virq <= 0) {
 902                         ret = -EINVAL;
 903                         goto err_muic_irq;
 904                 }
 905                 muic_irq->virq = virq;
 906
 907                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
 908                                 max77843_muic_irq_handler, IRQF_NO_SUSPEND,
 909                                 muic_irq->name, info);
 910                 if (ret) {
 911                         dev_err(&pdev->dev,
 912                                 "Failed to request irq (IRQ: %d, error: %d)\n",
 913                                 muic_irq->irq, ret);
 914                         goto err_muic_irq;
 915                 }
 916         }
 917
 918         /* Detect accessory after completing the initialization of platform */
 919         INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
 920         queue_delayed_work(system_power_efficient_wq,
 921                         &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
 922
 923         return 0;
 924
 925 err_muic_irq:
 926         regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
 927         i2c_unregister_device(max77843->i2c_muic);
 928
 929         return ret;
 930 }
 931
 932 static int max77843_muic_remove(struct platform_device *pdev)
 933 {
 934         struct max77843_muic_info *info = platform_get_drvdata(pdev);
 935         struct max77693_dev *max77843 = info->max77843;
 936
 937         cancel_work_sync(&info->irq_work);
 938         regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
 939         i2c_unregister_device(max77843->i2c_muic);
 940
 941         return 0;
 942 }
 943
 944 static const struct platform_device_id max77843_muic_id[] = {
 945         { "max77843-muic", },
 946         { /* sentinel */ },
 947 };
 948 MODULE_DEVICE_TABLE(platform, max77843_muic_id);
 949
 950 static struct platform_driver max77843_muic_driver = {
 951         .driver         = {
 952                 .name           = "max77843-muic",
 953         },
 954         .probe          = max77843_muic_probe,
 955         .remove         = max77843_muic_remove,
 956         .id_table       = max77843_muic_id,
 957 };
 958
 959 static int __init max77843_muic_init(void)
 960 {
 961         return platform_driver_register(&max77843_muic_driver);
 962 }
 963 subsys_initcall(max77843_muic_init);
 964
 965 MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
 966 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
 967 MODULE_LICENSE("GPL");