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