drivers/extcon/extcon-max77843.c

   1 /*
   2  * extcon-max77843.c - Maxim MAX77843 extcon driver to support
   3  *                      MUIC(Micro USB Interface Controller)
   4  *
   5  * Copyright (C) 2015 Samsung Electronics
   6  * Author: Jaewon Kim <jaewon02.kim@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/extcon-provider.h>
  15 #include <linux/i2c.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/kernel.h>
  18 #include <linux/mfd/max77693-common.h>
  19 #include <linux/mfd/max77843-private.h>
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/workqueue.h>
  23
  24 #define DELAY_MS_DEFAULT                15000   /* unit: millisecond */
  25
  26 enum max77843_muic_status {
  27         MAX77843_MUIC_STATUS1 = 0,
  28         MAX77843_MUIC_STATUS2,
  29         MAX77843_MUIC_STATUS3,
  30
  31         MAX77843_MUIC_STATUS_NUM,
  32 };
  33
  34 struct max77843_muic_info {
  35         struct device *dev;
  36         struct max77693_dev *max77843;
  37         struct extcon_dev *edev;
  38
  39         struct mutex mutex;
  40         struct work_struct irq_work;
  41         struct delayed_work wq_detcable;
  42
  43         u8 status[MAX77843_MUIC_STATUS_NUM];
  44         int prev_cable_type;
  45         int prev_chg_type;
  46         int prev_gnd_type;
  47
  48         bool irq_adc;
  49         bool irq_chg;
  50 };
  51
  52 enum max77843_muic_cable_group {
  53         MAX77843_CABLE_GROUP_ADC = 0,
  54         MAX77843_CABLE_GROUP_ADC_GND,
  55         MAX77843_CABLE_GROUP_CHG,
  56 };
  57
  58 enum max77843_muic_adc_debounce_time {
  59         MAX77843_DEBOUNCE_TIME_5MS = 0,
  60         MAX77843_DEBOUNCE_TIME_10MS,
  61         MAX77843_DEBOUNCE_TIME_25MS,
  62         MAX77843_DEBOUNCE_TIME_38_62MS,
  63 };
  64
  65 /* Define accessory cable type */
  66 enum max77843_muic_accessory_type {
  67         MAX77843_MUIC_ADC_GROUND = 0,
  68         MAX77843_MUIC_ADC_SEND_END_BUTTON,
  69         MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,
  70         MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,
  71         MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,
  72         MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,
  73         MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,
  74         MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,
  75         MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,
  76         MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,
  77         MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,
  78         MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,
  79         MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,
  80         MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,
  81         MAX77843_MUIC_ADC_RESERVED_ACC_1,
  82         MAX77843_MUIC_ADC_RESERVED_ACC_2,
  83         MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */
  84         MAX77843_MUIC_ADC_RESERVED_ACC_4,
  85         MAX77843_MUIC_ADC_RESERVED_ACC_5,
  86         MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,
  87         MAX77843_MUIC_ADC_PHONE_POWERED_DEV,
  88         MAX77843_MUIC_ADC_TTY_CONVERTER,
  89         MAX77843_MUIC_ADC_UART_CABLE,
  90         MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,
  91         MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,
  92         MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,
  93         MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,
  94         MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,
  95         MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,
  96         MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,
  97         MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,
  98         MAX77843_MUIC_ADC_OPEN,
  99
 100         /*
 101          * The below accessories should check
 102          * not only ADC value but also ADC1K and VBVolt value.
 103          */
 104                                                 /* Offset|ADC1K|VBVolt| */
 105         MAX77843_MUIC_GND_USB_HOST = 0x100,     /*    0x1|    0|     0| */
 106         MAX77843_MUIC_GND_USB_HOST_VB = 0x101,  /*    0x1|    0|     1| */
 107         MAX77843_MUIC_GND_MHL = 0x102,          /*    0x1|    1|     0| */
 108         MAX77843_MUIC_GND_MHL_VB = 0x103,       /*    0x1|    1|     1| */
 109 };
 110
 111 /* Define charger cable type */
 112 enum max77843_muic_charger_type {
 113         MAX77843_MUIC_CHG_NONE = 0,
 114         MAX77843_MUIC_CHG_USB,
 115         MAX77843_MUIC_CHG_DOWNSTREAM,
 116         MAX77843_MUIC_CHG_DEDICATED,
 117         MAX77843_MUIC_CHG_SPECIAL_500MA,
 118         MAX77843_MUIC_CHG_SPECIAL_1A,
 119         MAX77843_MUIC_CHG_SPECIAL_BIAS,
 120         MAX77843_MUIC_CHG_RESERVED,
 121         MAX77843_MUIC_CHG_GND,
 122         MAX77843_MUIC_CHG_DOCK,
 123 };
 124
 125 static const unsigned int max77843_extcon_cable[] = {
 126         EXTCON_USB,
 127         EXTCON_USB_HOST,
 128         EXTCON_CHG_USB_SDP,
 129         EXTCON_CHG_USB_DCP,
 130         EXTCON_CHG_USB_CDP,
 131         EXTCON_CHG_USB_FAST,
 132         EXTCON_CHG_USB_SLOW,
 133         EXTCON_DISP_MHL,
 134         EXTCON_DOCK,
 135         EXTCON_JIG,
 136         EXTCON_NONE,
 137 };
 138
 139 struct max77843_muic_irq {
 140         unsigned int irq;
 141         const char *name;
 142         unsigned int virq;
 143 };
 144
 145 static struct max77843_muic_irq max77843_muic_irqs[] = {
 146         { MAX77843_MUIC_IRQ_INT1_ADC,           "MUIC-ADC" },
 147         { MAX77843_MUIC_IRQ_INT1_ADCERROR,      "MUIC-ADC_ERROR" },
 148         { MAX77843_MUIC_IRQ_INT1_ADC1K,         "MUIC-ADC1K" },
 149         { MAX77843_MUIC_IRQ_INT2_CHGTYP,        "MUIC-CHGTYP" },
 150         { MAX77843_MUIC_IRQ_INT2_CHGDETRUN,     "MUIC-CHGDETRUN" },
 151         { MAX77843_MUIC_IRQ_INT2_DCDTMR,        "MUIC-DCDTMR" },
 152         { MAX77843_MUIC_IRQ_INT2_DXOVP,         "MUIC-DXOVP" },
 153         { MAX77843_MUIC_IRQ_INT2_VBVOLT,        "MUIC-VBVOLT" },
 154         { MAX77843_MUIC_IRQ_INT3_VBADC,         "MUIC-VBADC" },
 155         { MAX77843_MUIC_IRQ_INT3_VDNMON,        "MUIC-VDNMON" },
 156         { MAX77843_MUIC_IRQ_INT3_DNRES,         "MUIC-DNRES" },
 157         { MAX77843_MUIC_IRQ_INT3_MPNACK,        "MUIC-MPNACK"},
 158         { MAX77843_MUIC_IRQ_INT3_MRXBUFOW,      "MUIC-MRXBUFOW"},
 159         { MAX77843_MUIC_IRQ_INT3_MRXTRF,        "MUIC-MRXTRF"},
 160         { MAX77843_MUIC_IRQ_INT3_MRXPERR,       "MUIC-MRXPERR"},
 161         { MAX77843_MUIC_IRQ_INT3_MRXRDY,        "MUIC-MRXRDY"},
 162 };
 163
 164 static const struct regmap_config max77843_muic_regmap_config = {
 165         .reg_bits       = 8,
 166         .val_bits       = 8,
 167         .max_register   = MAX77843_MUIC_REG_END,
 168 };
 169
 170 static const struct regmap_irq max77843_muic_irq[] = {
 171         /* INT1 interrupt */
 172         { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, },
 173         { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, },
 174         { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, },
 175
 176         /* INT2 interrupt */
 177         { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, },
 178         { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, },
 179         { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, },
 180         { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, },
 181         { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, },
 182
 183         /* INT3 interrupt */
 184         { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, },
 185         { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, },
 186         { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, },
 187         { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, },
 188         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, },
 189         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, },
 190         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, },
 191         { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, },
 192 };
 193
 194 static const struct regmap_irq_chip max77843_muic_irq_chip = {
 195         .name           = "max77843-muic",
 196         .status_base    = MAX77843_MUIC_REG_INT1,
 197         .mask_base      = MAX77843_MUIC_REG_INTMASK1,
 198         .mask_invert    = true,
 199         .num_regs       = 3,
 200         .irqs           = max77843_muic_irq,
 201         .num_irqs       = ARRAY_SIZE(max77843_muic_irq),
 202 };
 203
 204 static int max77843_muic_set_path(struct max77843_muic_info *info,
 205                 u8 val, bool attached, bool nobccomp)
 206 {
 207         struct max77693_dev *max77843 = info->max77843;
 208         int ret = 0;
 209         unsigned int ctrl1, ctrl2;
 210
 211         if (attached)
 212                 ctrl1 = val;
 213         else
 214                 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;
 215         if (nobccomp) {
 216                 /* Disable BC1.2 protocol and force manual switch control */
 217                 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;
 218         }
 219
 220         ret = regmap_update_bits(max77843->regmap_muic,
 221                         MAX77843_MUIC_REG_CONTROL1,
 222                         MAX77843_MUIC_CONTROL1_COM_SW |
 223                                 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,
 224                         ctrl1);
 225         if (ret < 0) {
 226                 dev_err(info->dev, "Cannot switch MUIC port\n");
 227                 return ret;
 228         }
 229
 230         if (attached)
 231                 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;
 232         else
 233                 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;
 234
 235         ret = regmap_update_bits(max77843->regmap_muic,
 236                         MAX77843_MUIC_REG_CONTROL2,
 237                         MAX77843_MUIC_CONTROL2_LOWPWR_MASK |
 238                         MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);
 239         if (ret < 0) {
 240                 dev_err(info->dev, "Cannot update lowpower mode\n");
 241                 return ret;
 242         }
 243
 244         dev_dbg(info->dev,
 245                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 246                 ctrl1, ctrl2, attached ? "attached" : "detached");
 247
 248         return 0;
 249 }
 250
 251 static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,
 252                  bool on)
 253 {
 254         struct max77693_dev *max77843 = info->max77843;
 255         unsigned int cnfg00;
 256
 257         if (on)
 258                 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;
 259         else
 260                 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;
 261
 262         regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,
 263                            MAX77843_CHG_MODE_MASK, cnfg00);
 264 }
 265
 266 static int max77843_muic_get_cable_type(struct max77843_muic_info *info,
 267                 enum max77843_muic_cable_group group, bool *attached)
 268 {
 269         int adc, chg_type, cable_type, gnd_type;
 270
 271         adc = info->status[MAX77843_MUIC_STATUS1] &
 272                         MAX77843_MUIC_STATUS1_ADC_MASK;
 273         adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;
 274
 275         switch (group) {
 276         case MAX77843_CABLE_GROUP_ADC:
 277                 if (adc == MAX77843_MUIC_ADC_OPEN) {
 278                         *attached = false;
 279                         cable_type = info->prev_cable_type;
 280                         info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;
 281                 } else {
 282                         *attached = true;
 283                         cable_type = info->prev_cable_type = adc;
 284                 }
 285                 break;
 286         case MAX77843_CABLE_GROUP_CHG:
 287                 chg_type = info->status[MAX77843_MUIC_STATUS2] &
 288                                 MAX77843_MUIC_STATUS2_CHGTYP_MASK;
 289
 290                 /* Check GROUND accessory with charger cable */
 291                 if (adc == MAX77843_MUIC_ADC_GROUND) {
 292                         if (chg_type == MAX77843_MUIC_CHG_NONE) {
 293                                 /*
 294                                  * The following state when charger cable is
 295                                  * disconnected but the GROUND accessory still
 296                                  * connected.
 297                                  */
 298                                 *attached = false;
 299                                 cable_type = info->prev_chg_type;
 300                                 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
 301                         } else {
 302
 303                                 /*
 304                                  * The following state when charger cable is
 305                                  * connected on the GROUND accessory.
 306                                  */
 307                                 *attached = true;
 308                                 cable_type = MAX77843_MUIC_CHG_GND;
 309                                 info->prev_chg_type = MAX77843_MUIC_CHG_GND;
 310                         }
 311                         break;
 312                 }
 313
 314                 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */
 315                         if (chg_type == MAX77843_MUIC_CHG_NONE) {
 316                                 *attached = false;
 317                                 cable_type = info->prev_chg_type;
 318                                 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
 319                         } else {
 320                                 *attached = true;
 321                                 cable_type = MAX77843_MUIC_CHG_DOCK;
 322                                 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;
 323                         }
 324                         break;
 325                 }
 326
 327                 if (chg_type == MAX77843_MUIC_CHG_NONE) {
 328                         *attached = false;
 329                         cable_type = info->prev_chg_type;
 330                         info->prev_chg_type = MAX77843_MUIC_CHG_NONE;
 331                 } else {
 332                         *attached = true;
 333                         cable_type = info->prev_chg_type = chg_type;
 334                 }
 335                 break;
 336         case MAX77843_CABLE_GROUP_ADC_GND:
 337                 if (adc == MAX77843_MUIC_ADC_OPEN) {
 338                         *attached = false;
 339                         cable_type = info->prev_gnd_type;
 340                         info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;
 341                 } else {
 342                         *attached = true;
 343
 344                         /*
 345                          * Offset|ADC1K|VBVolt|
 346                          *    0x1|    0|     0| USB-HOST
 347                          *    0x1|    0|     1| USB-HOST with VB
 348                          *    0x1|    1|     0| MHL
 349                          *    0x1|    1|     1| MHL with VB
 350                          */
 351                         /* Get ADC1K register bit */
 352                         gnd_type = (info->status[MAX77843_MUIC_STATUS1] &
 353                                         MAX77843_MUIC_STATUS1_ADC1K_MASK);
 354
 355                         /* Get VBVolt register bit */
 356                         gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &
 357                                         MAX77843_MUIC_STATUS2_VBVOLT_MASK);
 358                         gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;
 359
 360                         /* Offset of GND cable */
 361                         gnd_type |= MAX77843_MUIC_GND_USB_HOST;
 362                         cable_type = info->prev_gnd_type = gnd_type;
 363                 }
 364                 break;
 365         default:
 366                 dev_err(info->dev, "Unknown cable group (%d)\n", group);
 367                 cable_type = -EINVAL;
 368                 break;
 369         }
 370
 371         return cable_type;
 372 }
 373
 374 static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)
 375 {
 376         int ret, gnd_cable_type;
 377         bool attached;
 378
 379         gnd_cable_type = max77843_muic_get_cable_type(info,
 380                         MAX77843_CABLE_GROUP_ADC_GND, &attached);
 381         dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",
 382                         attached ? "attached" : "detached", gnd_cable_type);
 383
 384         switch (gnd_cable_type) {
 385         case MAX77843_MUIC_GND_USB_HOST:
 386         case MAX77843_MUIC_GND_USB_HOST_VB:
 387                 ret = max77843_muic_set_path(info,
 388                                              MAX77843_MUIC_CONTROL1_SW_USB,
 389                                              attached, false);
 390                 if (ret < 0)
 391                         return ret;
 392
 393                 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 394                 max77843_charger_set_otg_vbus(info, attached);
 395                 break;
 396         case MAX77843_MUIC_GND_MHL_VB:
 397         case MAX77843_MUIC_GND_MHL:
 398                 ret = max77843_muic_set_path(info,
 399                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 400                                              attached, false);
 401                 if (ret < 0)
 402                         return ret;
 403
 404                 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 405                 break;
 406         default:
 407                 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",
 408                         attached ? "attached" : "detached", gnd_cable_type);
 409                 return -EINVAL;
 410         }
 411
 412         return 0;
 413 }
 414
 415 static int max77843_muic_jig_handler(struct max77843_muic_info *info,
 416                 int cable_type, bool attached)
 417 {
 418         int ret;
 419         u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;
 420
 421         dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",
 422                         attached ? "attached" : "detached", cable_type);
 423
 424         switch (cable_type) {
 425         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
 426         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
 427                 path = MAX77843_MUIC_CONTROL1_SW_USB;
 428                 break;
 429         case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
 430                 path = MAX77843_MUIC_CONTROL1_SW_UART;
 431                 break;
 432         default:
 433                 return -EINVAL;
 434         }
 435
 436         ret = max77843_muic_set_path(info, path, attached, false);
 437         if (ret < 0)
 438                 return ret;
 439
 440         extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
 441
 442         return 0;
 443 }
 444
 445 static int max77843_muic_dock_handler(struct max77843_muic_info *info,
 446                 bool attached)
 447 {
 448         int ret;
 449
 450         dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",
 451                         attached ? "attached" : "detached");
 452
 453         ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,
 454                                      attached, attached);
 455         if (ret < 0)
 456                 return ret;
 457
 458         extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 459         extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 460         extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
 461
 462         return 0;
 463 }
 464
 465 static int max77843_muic_adc_handler(struct max77843_muic_info *info)
 466 {
 467         int ret, cable_type;
 468         bool attached;
 469
 470         cable_type = max77843_muic_get_cable_type(info,
 471                         MAX77843_CABLE_GROUP_ADC, &attached);
 472
 473         dev_dbg(info->dev,
 474                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 475                 attached ? "attached" : "detached", cable_type,
 476                 info->prev_cable_type);
 477
 478         switch (cable_type) {
 479         case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */
 480                 ret = max77843_muic_dock_handler(info, attached);
 481                 if (ret < 0)
 482                         return ret;
 483                 break;
 484         case MAX77843_MUIC_ADC_GROUND:
 485                 ret = max77843_muic_adc_gnd_handler(info);
 486                 if (ret < 0)
 487                         return ret;
 488                 break;
 489         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:
 490         case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:
 491         case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:
 492                 ret = max77843_muic_jig_handler(info, cable_type, attached);
 493                 if (ret < 0)
 494                         return ret;
 495                 break;
 496         case MAX77843_MUIC_ADC_SEND_END_BUTTON:
 497         case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:
 498         case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:
 499         case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:
 500         case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:
 501         case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:
 502         case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:
 503         case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:
 504         case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:
 505         case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:
 506         case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:
 507         case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:
 508         case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:
 509         case MAX77843_MUIC_ADC_RESERVED_ACC_1:
 510         case MAX77843_MUIC_ADC_RESERVED_ACC_2:
 511         case MAX77843_MUIC_ADC_RESERVED_ACC_4:
 512         case MAX77843_MUIC_ADC_RESERVED_ACC_5:
 513         case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:
 514         case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:
 515         case MAX77843_MUIC_ADC_TTY_CONVERTER:
 516         case MAX77843_MUIC_ADC_UART_CABLE:
 517         case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:
 518         case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:
 519         case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:
 520         case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:
 521         case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:
 522         case MAX77843_MUIC_ADC_OPEN:
 523                 dev_err(info->dev,
 524                         "accessory is %s but it isn't used (adc:0x%x)\n",
 525                         attached ? "attached" : "detached", cable_type);
 526                 return -EAGAIN;
 527         default:
 528                 dev_err(info->dev,
 529                         "failed to detect %s accessory (adc:0x%x)\n",
 530                         attached ? "attached" : "detached", cable_type);
 531                 return -EINVAL;
 532         }
 533
 534         return 0;
 535 }
 536
 537 static int max77843_muic_chg_handler(struct max77843_muic_info *info)
 538 {
 539         int ret, chg_type, gnd_type;
 540         bool attached;
 541
 542         chg_type = max77843_muic_get_cable_type(info,
 543                         MAX77843_CABLE_GROUP_CHG, &attached);
 544
 545         dev_dbg(info->dev,
 546                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 547                 attached ? "attached" : "detached",
 548                 chg_type, info->prev_chg_type);
 549
 550         switch (chg_type) {
 551         case MAX77843_MUIC_CHG_USB:
 552                 ret = max77843_muic_set_path(info,
 553                                              MAX77843_MUIC_CONTROL1_SW_USB,
 554                                              attached, false);
 555                 if (ret < 0)
 556                         return ret;
 557
 558                 extcon_set_state_sync(info->edev, EXTCON_USB, attached);
 559                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 560                                         attached);
 561                 break;
 562         case MAX77843_MUIC_CHG_DOWNSTREAM:
 563                 ret = max77843_muic_set_path(info,
 564                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 565                                              attached, false);
 566                 if (ret < 0)
 567                         return ret;
 568
 569                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
 570                                         attached);
 571                 break;
 572         case MAX77843_MUIC_CHG_DEDICATED:
 573                 ret = max77843_muic_set_path(info,
 574                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 575                                              attached, false);
 576                 if (ret < 0)
 577                         return ret;
 578
 579                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 580                                         attached);
 581                 break;
 582         case MAX77843_MUIC_CHG_SPECIAL_500MA:
 583                 ret = max77843_muic_set_path(info,
 584                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 585                                              attached, false);
 586                 if (ret < 0)
 587                         return ret;
 588
 589                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
 590                                         attached);
 591                 break;
 592         case MAX77843_MUIC_CHG_SPECIAL_1A:
 593                 ret = max77843_muic_set_path(info,
 594                                              MAX77843_MUIC_CONTROL1_SW_OPEN,
 595                                              attached, false);
 596                 if (ret < 0)
 597                         return ret;
 598
 599                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
 600                                         attached);
 601                 break;
 602         case MAX77843_MUIC_CHG_GND:
 603                 gnd_type = max77843_muic_get_cable_type(info,
 604                                 MAX77843_CABLE_GROUP_ADC_GND, &attached);
 605
 606                 /* Charger cable on MHL accessory is attach or detach */
 607                 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)
 608                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 609                                                 true);
 610                 else if (gnd_type == MAX77843_MUIC_GND_MHL)
 611                         extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 612                                                 false);
 613                 break;
 614         case MAX77843_MUIC_CHG_DOCK:
 615                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);
 616                 break;
 617         case MAX77843_MUIC_CHG_NONE:
 618                 break;
 619         default:
 620                 dev_err(info->dev,
 621                         "failed to detect %s accessory (chg_type:0x%x)\n",
 622                         attached ? "attached" : "detached", chg_type);
 623
 624                 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,
 625                                        attached, false);
 626                 return -EINVAL;
 627         }
 628
 629         return 0;
 630 }
 631
 632 static void max77843_muic_irq_work(struct work_struct *work)
 633 {
 634         struct max77843_muic_info *info = container_of(work,
 635                         struct max77843_muic_info, irq_work);
 636         struct max77693_dev *max77843 = info->max77843;
 637         int ret = 0;
 638
 639         mutex_lock(&info->mutex);
 640
 641         ret = regmap_bulk_read(max77843->regmap_muic,
 642                         MAX77843_MUIC_REG_STATUS1, info->status,
 643                         MAX77843_MUIC_STATUS_NUM);
 644         if (ret) {
 645                 dev_err(info->dev, "Cannot read STATUS registers\n");
 646                 mutex_unlock(&info->mutex);
 647                 return;
 648         }
 649
 650         if (info->irq_adc) {
 651                 ret = max77843_muic_adc_handler(info);
 652                 if (ret)
 653                         dev_err(info->dev, "Unknown cable type\n");
 654                 info->irq_adc = false;
 655         }
 656
 657         if (info->irq_chg) {
 658                 ret = max77843_muic_chg_handler(info);
 659                 if (ret)
 660                         dev_err(info->dev, "Unknown charger type\n");
 661                 info->irq_chg = false;
 662         }
 663
 664         mutex_unlock(&info->mutex);
 665 }
 666
 667 static irqreturn_t max77843_muic_irq_handler(int irq, void *data)
 668 {
 669         struct max77843_muic_info *info = data;
 670         int i, irq_type = -1;
 671
 672         for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)
 673                 if (irq == max77843_muic_irqs[i].virq)
 674                         irq_type = max77843_muic_irqs[i].irq;
 675
 676         switch (irq_type) {
 677         case MAX77843_MUIC_IRQ_INT1_ADC:
 678         case MAX77843_MUIC_IRQ_INT1_ADCERROR:
 679         case MAX77843_MUIC_IRQ_INT1_ADC1K:
 680                 info->irq_adc = true;
 681                 break;
 682         case MAX77843_MUIC_IRQ_INT2_CHGTYP:
 683         case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:
 684         case MAX77843_MUIC_IRQ_INT2_DCDTMR:
 685         case MAX77843_MUIC_IRQ_INT2_DXOVP:
 686         case MAX77843_MUIC_IRQ_INT2_VBVOLT:
 687                 info->irq_chg = true;
 688                 break;
 689         case MAX77843_MUIC_IRQ_INT3_VBADC:
 690         case MAX77843_MUIC_IRQ_INT3_VDNMON:
 691         case MAX77843_MUIC_IRQ_INT3_DNRES:
 692         case MAX77843_MUIC_IRQ_INT3_MPNACK:
 693         case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:
 694         case MAX77843_MUIC_IRQ_INT3_MRXTRF:
 695         case MAX77843_MUIC_IRQ_INT3_MRXPERR:
 696         case MAX77843_MUIC_IRQ_INT3_MRXRDY:
 697                 break;
 698         default:
 699                 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);
 700                 break;
 701         }
 702
 703         schedule_work(&info->irq_work);
 704
 705         return IRQ_HANDLED;
 706 }
 707
 708 static void max77843_muic_detect_cable_wq(struct work_struct *work)
 709 {
 710         struct max77843_muic_info *info = container_of(to_delayed_work(work),
 711                         struct max77843_muic_info, wq_detcable);
 712         struct max77693_dev *max77843 = info->max77843;
 713         int chg_type, adc, ret;
 714         bool attached;
 715
 716         mutex_lock(&info->mutex);
 717
 718         ret = regmap_bulk_read(max77843->regmap_muic,
 719                         MAX77843_MUIC_REG_STATUS1, info->status,
 720                         MAX77843_MUIC_STATUS_NUM);
 721         if (ret) {
 722                 dev_err(info->dev, "Cannot read STATUS registers\n");
 723                 goto err_cable_wq;
 724         }
 725
 726         adc = max77843_muic_get_cable_type(info,
 727                         MAX77843_CABLE_GROUP_ADC, &attached);
 728         if (attached && adc != MAX77843_MUIC_ADC_OPEN) {
 729                 ret = max77843_muic_adc_handler(info);
 730                 if (ret < 0) {
 731                         dev_err(info->dev, "Cannot detect accessory\n");
 732                         goto err_cable_wq;
 733                 }
 734         }
 735
 736         chg_type = max77843_muic_get_cable_type(info,
 737                         MAX77843_CABLE_GROUP_CHG, &attached);
 738         if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {
 739                 ret = max77843_muic_chg_handler(info);
 740                 if (ret < 0) {
 741                         dev_err(info->dev, "Cannot detect charger accessory\n");
 742                         goto err_cable_wq;
 743                 }
 744         }
 745
 746 err_cable_wq:
 747         mutex_unlock(&info->mutex);
 748 }
 749
 750 static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,
 751                 enum max77843_muic_adc_debounce_time time)
 752 {
 753         struct max77693_dev *max77843 = info->max77843;
 754         int ret;
 755
 756         switch (time) {
 757         case MAX77843_DEBOUNCE_TIME_5MS:
 758         case MAX77843_DEBOUNCE_TIME_10MS:
 759         case MAX77843_DEBOUNCE_TIME_25MS:
 760         case MAX77843_DEBOUNCE_TIME_38_62MS:
 761                 ret = regmap_update_bits(max77843->regmap_muic,
 762                                 MAX77843_MUIC_REG_CONTROL4,
 763                                 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,
 764                                 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);
 765                 if (ret < 0) {
 766                         dev_err(info->dev, "Cannot write MUIC regmap\n");
 767                         return ret;
 768                 }
 769                 break;
 770         default:
 771                 dev_err(info->dev, "Invalid ADC debounce time\n");
 772                 return -EINVAL;
 773         }
 774
 775         return 0;
 776 }
 777
 778 static int max77843_init_muic_regmap(struct max77693_dev *max77843)
 779 {
 780         int ret;
 781
 782         max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter,
 783                         I2C_ADDR_MUIC);
 784         if (!max77843->i2c_muic) {
 785                 dev_err(&max77843->i2c->dev,
 786                                 "Cannot allocate I2C device for MUIC\n");
 787                 return -ENOMEM;
 788         }
 789
 790         i2c_set_clientdata(max77843->i2c_muic, max77843);
 791
 792         max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,
 793                         &max77843_muic_regmap_config);
 794         if (IS_ERR(max77843->regmap_muic)) {
 795                 ret = PTR_ERR(max77843->regmap_muic);
 796                 goto err_muic_i2c;
 797         }
 798
 799         ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,
 800                         IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
 801                         0, &max77843_muic_irq_chip, &max77843->irq_data_muic);
 802         if (ret < 0) {
 803                 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");
 804                 goto err_muic_i2c;
 805         }
 806
 807         return 0;
 808
 809 err_muic_i2c:
 810         i2c_unregister_device(max77843->i2c_muic);
 811
 812         return ret;
 813 }
 814
 815 static int max77843_muic_probe(struct platform_device *pdev)
 816 {
 817         struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);
 818         struct max77843_muic_info *info;
 819         unsigned int id;
 820         int i, ret;
 821
 822         info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 823         if (!info)
 824                 return -ENOMEM;
 825
 826         info->dev = &pdev->dev;
 827         info->max77843 = max77843;
 828
 829         platform_set_drvdata(pdev, info);
 830         mutex_init(&info->mutex);
 831
 832         /* Initialize i2c and regmap */
 833         ret = max77843_init_muic_regmap(max77843);
 834         if (ret) {
 835                 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");
 836                 return ret;
 837         }
 838
 839         /* Turn off auto detection configuration */
 840         ret = regmap_update_bits(max77843->regmap_muic,
 841                         MAX77843_MUIC_REG_CONTROL4,
 842                         MAX77843_MUIC_CONTROL4_USBAUTO_MASK |
 843                         MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,
 844                         CONTROL4_AUTO_DISABLE);
 845
 846         /* Initialize extcon device */
 847         info->edev = devm_extcon_dev_allocate(&pdev->dev,
 848                         max77843_extcon_cable);
 849         if (IS_ERR(info->edev)) {
 850                 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");
 851                 ret = -ENODEV;
 852                 goto err_muic_irq;
 853         }
 854
 855         ret = devm_extcon_dev_register(&pdev->dev, info->edev);
 856         if (ret) {
 857                 dev_err(&pdev->dev, "Failed to register extcon device\n");
 858                 goto err_muic_irq;
 859         }
 860
 861         /* Set ADC debounce time */
 862         max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);
 863
 864         /* Set initial path for UART */
 865         max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true,
 866                                false);
 867
 868         /* Check revision number of MUIC device */
 869         ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);
 870         if (ret < 0) {
 871                 dev_err(&pdev->dev, "Failed to read revision number\n");
 872                 goto err_muic_irq;
 873         }
 874         dev_info(info->dev, "MUIC device ID : 0x%x\n", id);
 875
 876         /* Support virtual irq domain for max77843 MUIC device */
 877         INIT_WORK(&info->irq_work, max77843_muic_irq_work);
 878
 879         /* Clear IRQ bits before request IRQs */
 880         ret = regmap_bulk_read(max77843->regmap_muic,
 881                         MAX77843_MUIC_REG_INT1, info->status,
 882                         MAX77843_MUIC_STATUS_NUM);
 883         if (ret) {
 884                 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");
 885                 goto err_muic_irq;
 886         }
 887
 888         for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {
 889                 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];
 890                 int virq = 0;
 891
 892                 virq = regmap_irq_get_virq(max77843->irq_data_muic,
 893                                 muic_irq->irq);
 894                 if (virq <= 0) {
 895                         ret = -EINVAL;
 896                         goto err_muic_irq;
 897                 }
 898                 muic_irq->virq = virq;
 899
 900                 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
 901                                 max77843_muic_irq_handler, IRQF_NO_SUSPEND,
 902                                 muic_irq->name, info);
 903                 if (ret) {
 904                         dev_err(&pdev->dev,
 905                                 "Failed to request irq (IRQ: %d, error: %d)\n",
 906                                 muic_irq->irq, ret);
 907                         goto err_muic_irq;
 908                 }
 909         }
 910
 911         /* Detect accessory after completing the initialization of platform */
 912         INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);
 913         queue_delayed_work(system_power_efficient_wq,
 914                         &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));
 915
 916         return 0;
 917
 918 err_muic_irq:
 919         regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
 920         i2c_unregister_device(max77843->i2c_muic);
 921
 922         return ret;
 923 }
 924
 925 static int max77843_muic_remove(struct platform_device *pdev)
 926 {
 927         struct max77843_muic_info *info = platform_get_drvdata(pdev);
 928         struct max77693_dev *max77843 = info->max77843;
 929
 930         cancel_work_sync(&info->irq_work);
 931         regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);
 932         i2c_unregister_device(max77843->i2c_muic);
 933
 934         return 0;
 935 }
 936
 937 static const struct platform_device_id max77843_muic_id[] = {
 938         { "max77843-muic", },
 939         { /* sentinel */ },
 940 };
 941 MODULE_DEVICE_TABLE(platform, max77843_muic_id);
 942
 943 static struct platform_driver max77843_muic_driver = {
 944         .driver         = {
 945                 .name           = "max77843-muic",
 946         },
 947         .probe          = max77843_muic_probe,
 948         .remove         = max77843_muic_remove,
 949         .id_table       = max77843_muic_id,
 950 };
 951
 952 static int __init max77843_muic_init(void)
 953 {
 954         return platform_driver_register(&max77843_muic_driver);
 955 }
 956 subsys_initcall(max77843_muic_init);
 957
 958 MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");
 959 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
 960 MODULE_LICENSE("GPL");