drivers/extcon/extcon-sm5502.c

   1 /*
   2  * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
   3  *
   4  * Copyright (c) 2014 Samsung Electronics Co., Ltd
   5  * Author: Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/i2c.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/irqdomain.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regmap.h>
  21 #include <linux/slab.h>
  22 #include <linux/extcon.h>
  23
  24 #include "extcon-sm5502.h"
  25
  26 #define DELAY_MS_DEFAULT                17000   /* unit: millisecond */
  27
  28 struct muic_irq {
  29         unsigned int irq;
  30         const char *name;
  31         unsigned int virq;
  32 };
  33
  34 struct reg_data {
  35         u8 reg;
  36         unsigned int val;
  37         bool invert;
  38 };
  39
  40 struct sm5502_muic_info {
  41         struct device *dev;
  42         struct extcon_dev *edev;
  43
  44         struct i2c_client *i2c;
  45         struct regmap *regmap;
  46
  47         struct regmap_irq_chip_data *irq_data;
  48         struct muic_irq *muic_irqs;
  49         unsigned int num_muic_irqs;
  50         int irq;
  51         bool irq_attach;
  52         bool irq_detach;
  53         struct work_struct irq_work;
  54
  55         struct reg_data *reg_data;
  56         unsigned int num_reg_data;
  57
  58         struct mutex mutex;
  59
  60         /*
  61          * Use delayed workqueue to detect cable state and then
  62          * notify cable state to notifiee/platform through uevent.
  63          * After completing the booting of platform, the extcon provider
  64          * driver should notify cable state to upper layer.
  65          */
  66         struct delayed_work wq_detcable;
  67 };
  68
  69 /* Default value of SM5502 register to bring up MUIC device. */
  70 static struct reg_data sm5502_reg_data[] = {
  71         {
  72                 .reg = SM5502_REG_CONTROL,
  73                 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
  74                 .invert = false,
  75         }, {
  76                 .reg = SM5502_REG_INTMASK1,
  77                 .val = SM5502_REG_INTM1_KP_MASK
  78                         | SM5502_REG_INTM1_LKP_MASK
  79                         | SM5502_REG_INTM1_LKR_MASK,
  80                 .invert = true,
  81         }, {
  82                 .reg = SM5502_REG_INTMASK2,
  83                 .val = SM5502_REG_INTM2_VBUS_DET_MASK
  84                         | SM5502_REG_INTM2_REV_ACCE_MASK
  85                         | SM5502_REG_INTM2_ADC_CHG_MASK
  86                         | SM5502_REG_INTM2_STUCK_KEY_MASK
  87                         | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
  88                         | SM5502_REG_INTM2_MHL_MASK,
  89                 .invert = true,
  90         },
  91         { }
  92 };
  93
  94 /* List of detectable cables */
  95 enum {
  96         EXTCON_CABLE_USB = 0,
  97         EXTCON_CABLE_USB_HOST,
  98         EXTCON_CABLE_TA,
  99
 100         EXTCON_CABLE_END,
 101 };
 102
 103 static const char *sm5502_extcon_cable[] = {
 104         [EXTCON_CABLE_USB]      = "USB",
 105         [EXTCON_CABLE_USB_HOST] = "USB-Host",
 106         [EXTCON_CABLE_TA]       = "TA",
 107         NULL,
 108 };
 109
 110 /* Define supported accessory type */
 111 enum sm5502_muic_acc_type {
 112         SM5502_MUIC_ADC_GROUND = 0x0,
 113         SM5502_MUIC_ADC_SEND_END_BUTTON,
 114         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
 115         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
 116         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
 117         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
 118         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
 119         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
 120         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
 121         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
 122         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
 123         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
 124         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
 125         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
 126         SM5502_MUIC_ADC_RESERVED_ACC_1,
 127         SM5502_MUIC_ADC_RESERVED_ACC_2,
 128         SM5502_MUIC_ADC_RESERVED_ACC_3,
 129         SM5502_MUIC_ADC_RESERVED_ACC_4,
 130         SM5502_MUIC_ADC_RESERVED_ACC_5,
 131         SM5502_MUIC_ADC_AUDIO_TYPE2,
 132         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
 133         SM5502_MUIC_ADC_TTY_CONVERTER,
 134         SM5502_MUIC_ADC_UART_CABLE,
 135         SM5502_MUIC_ADC_TYPE1_CHARGER,
 136         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
 137         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
 138         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
 139         SM5502_MUIC_ADC_TYPE2_CHARGER,
 140         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
 141         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
 142         SM5502_MUIC_ADC_AUDIO_TYPE1,
 143         SM5502_MUIC_ADC_OPEN = 0x1f,
 144
 145         /* The below accessories have same ADC value (0x1f or 0x1e).
 146            So, Device type1 is used to separate specific accessory. */
 147                                                         /* |---------|--ADC| */
 148                                                         /* |    [7:5]|[4:0]| */
 149         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 150         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 151                                                         /* |Dev Type1|--ADC| */
 152         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
 153         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
 154         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
 155 };
 156
 157 /* List of supported interrupt for SM5502 */
 158 static struct muic_irq sm5502_muic_irqs[] = {
 159         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
 160         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
 161         { SM5502_IRQ_INT1_KP,           "muic-kp" },
 162         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
 163         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
 164         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 165         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
 166         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
 167         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
 168         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
 169         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
 170         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
 171         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
 172         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
 173 };
 174
 175 /* Define interrupt list of SM5502 to register regmap_irq */
 176 static const struct regmap_irq sm5502_irqs[] = {
 177         /* INT1 interrupts */
 178         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
 179         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
 180         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
 181         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
 182         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
 183         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
 184         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
 185         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
 186
 187         /* INT2 interrupts */
 188         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
 189         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
 190         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
 191         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
 192         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
 193         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
 194 };
 195
 196 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
 197         .name                   = "sm5502",
 198         .status_base            = SM5502_REG_INT1,
 199         .mask_base              = SM5502_REG_INTMASK1,
 200         .mask_invert            = false,
 201         .num_regs               = 2,
 202         .irqs                   = sm5502_irqs,
 203         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
 204 };
 205
 206 /* Define regmap configuration of SM5502 for I2C communication  */
 207 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
 208 {
 209         switch (reg) {
 210         case SM5502_REG_INTMASK1:
 211         case SM5502_REG_INTMASK2:
 212                 return true;
 213         default:
 214                 break;
 215         }
 216         return false;
 217 }
 218
 219 static const struct regmap_config sm5502_muic_regmap_config = {
 220         .reg_bits       = 8,
 221         .val_bits       = 8,
 222         .volatile_reg   = sm5502_muic_volatile_reg,
 223         .max_register   = SM5502_REG_END,
 224 };
 225
 226 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
 227 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 228                                 unsigned int con_sw, unsigned int vbus_sw,
 229                                 bool attached)
 230 {
 231         int ret;
 232
 233         if (!attached) {
 234                 con_sw  = DM_DP_SWITCH_OPEN;
 235                 vbus_sw = VBUSIN_SWITCH_OPEN;
 236         }
 237
 238         switch (con_sw) {
 239         case DM_DP_SWITCH_OPEN:
 240         case DM_DP_SWITCH_USB:
 241         case DM_DP_SWITCH_AUDIO:
 242         case DM_DP_SWITCH_UART:
 243                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 244                                          SM5502_REG_MANUAL_SW1_DP_MASK |
 245                                          SM5502_REG_MANUAL_SW1_DM_MASK,
 246                                          con_sw);
 247                 if (ret < 0) {
 248                         dev_err(info->dev,
 249                                 "cannot update DM_CON/DP_CON switch\n");
 250                         return ret;
 251                 }
 252                 break;
 253         default:
 254                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
 255                                 con_sw);
 256                 return -EINVAL;
 257         };
 258
 259         switch (vbus_sw) {
 260         case VBUSIN_SWITCH_OPEN:
 261         case VBUSIN_SWITCH_VBUSOUT:
 262         case VBUSIN_SWITCH_MIC:
 263         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
 264                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 265                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
 266                                          vbus_sw);
 267                 if (ret < 0) {
 268                         dev_err(info->dev,
 269                                 "cannot update VBUSIN switch\n");
 270                         return ret;
 271                 }
 272                 break;
 273         default:
 274                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
 275                 return -EINVAL;
 276         };
 277
 278         return 0;
 279 }
 280
 281 /* Return cable type of attached or detached accessories */
 282 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 283 {
 284         unsigned int cable_type = -1, adc, dev_type1;
 285         int ret;
 286
 287         /* Read ADC value according to external cable or button */
 288         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
 289         if (ret) {
 290                 dev_err(info->dev, "failed to read ADC register\n");
 291                 return ret;
 292         }
 293
 294         /*
 295          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
 296          * connected with to MUIC device.
 297          */
 298         cable_type = adc & SM5502_REG_ADC_MASK;
 299         if (cable_type == SM5502_MUIC_ADC_GROUND)
 300                 return SM5502_MUIC_ADC_GROUND;
 301
 302         switch (cable_type) {
 303         case SM5502_MUIC_ADC_GROUND:
 304         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 305         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 306         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 307         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 308         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 309         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 310         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 311         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 312         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 313         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 314         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 315         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 316         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 317         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 318         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 319         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 320         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 321         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 322         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 323         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 324         case SM5502_MUIC_ADC_TTY_CONVERTER:
 325         case SM5502_MUIC_ADC_UART_CABLE:
 326         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 327         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 328         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 329         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 330         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 331         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 332         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 333                 break;
 334         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 335                 /*
 336                  * Check whether cable type is
 337                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 338                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 339                  * by using Button event.
 340                  */
 341                 break;
 342         case SM5502_MUIC_ADC_OPEN:
 343                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 344                                   &dev_type1);
 345                 if (ret) {
 346                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 347                         return ret;
 348                 }
 349
 350                 switch (dev_type1) {
 351                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 352                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 353                         break;
 354                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 355                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 356                         break;
 357                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 358                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 359                         break;
 360                 default:
 361                         dev_dbg(info->dev,
 362                                 "cannot identify the cable type: adc(0x%x)\n",
 363                                 adc);
 364                         return -EINVAL;
 365                 };
 366                 break;
 367         default:
 368                 dev_err(info->dev,
 369                         "failed to identify the cable type: adc(0x%x)\n", adc);
 370                 return -EINVAL;
 371         };
 372
 373         return cable_type;
 374 }
 375
 376 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 377                                      bool attached)
 378 {
 379         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 380         const char **cable_names = info->edev->supported_cable;
 381         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 382         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 383         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 384         unsigned int idx = 0;
 385         int ret;
 386
 387         if (!cable_names)
 388                 return 0;
 389
 390         /* Get the type of attached or detached cable */
 391         if (attached)
 392                 cable_type = sm5502_muic_get_cable_type(info);
 393         else
 394                 cable_type = prev_cable_type;
 395         prev_cable_type = cable_type;
 396
 397         switch (cable_type) {
 398         case SM5502_MUIC_ADC_OPEN_USB:
 399                 idx     = EXTCON_CABLE_USB;
 400                 con_sw  = DM_DP_SWITCH_USB;
 401                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 402                 break;
 403         case SM5502_MUIC_ADC_OPEN_TA:
 404                 idx     = EXTCON_CABLE_TA;
 405                 con_sw  = DM_DP_SWITCH_OPEN;
 406                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 407                 break;
 408         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 409                 idx     = EXTCON_CABLE_USB_HOST;
 410                 con_sw  = DM_DP_SWITCH_USB;
 411                 vbus_sw = VBUSIN_SWITCH_OPEN;
 412                 break;
 413         default:
 414                 dev_dbg(info->dev,
 415                         "cannot handle this cable_type (0x%x)\n", cable_type);
 416                 return 0;
 417         };
 418
 419         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 420         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 421         if (ret < 0)
 422                 return ret;
 423
 424         /* Change the state of external accessory */
 425         extcon_set_cable_state(info->edev, cable_names[idx], attached);
 426
 427         return 0;
 428 }
 429
 430 static void sm5502_muic_irq_work(struct work_struct *work)
 431 {
 432         struct sm5502_muic_info *info = container_of(work,
 433                         struct sm5502_muic_info, irq_work);
 434         int ret = 0;
 435
 436         if (!info->edev)
 437                 return;
 438
 439         mutex_lock(&info->mutex);
 440
 441         /* Detect attached or detached cables */
 442         if (info->irq_attach) {
 443                 ret = sm5502_muic_cable_handler(info, true);
 444                 info->irq_attach = false;
 445         }
 446         if (info->irq_detach) {
 447                 ret = sm5502_muic_cable_handler(info, false);
 448                 info->irq_detach = false;
 449         }
 450
 451         if (ret < 0)
 452                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 453
 454         mutex_unlock(&info->mutex);
 455 }
 456
 457 /*
 458  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 459  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 460  */
 461 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 462 {
 463         switch (irq_type) {
 464         case SM5502_IRQ_INT1_ATTACH:
 465                 info->irq_attach = true;
 466                 break;
 467         case SM5502_IRQ_INT1_DETACH:
 468                 info->irq_detach = true;
 469                 break;
 470         case SM5502_IRQ_INT1_KP:
 471         case SM5502_IRQ_INT1_LKP:
 472         case SM5502_IRQ_INT1_LKR:
 473         case SM5502_IRQ_INT1_OVP_EVENT:
 474         case SM5502_IRQ_INT1_OCP_EVENT:
 475         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 476         case SM5502_IRQ_INT2_VBUS_DET:
 477         case SM5502_IRQ_INT2_REV_ACCE:
 478         case SM5502_IRQ_INT2_ADC_CHG:
 479         case SM5502_IRQ_INT2_STUCK_KEY:
 480         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 481         case SM5502_IRQ_INT2_MHL:
 482         default:
 483                 break;
 484         }
 485
 486         return 0;
 487 }
 488
 489 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 490 {
 491         struct sm5502_muic_info *info = data;
 492         int i, irq_type = -1, ret;
 493
 494         for (i = 0; i < info->num_muic_irqs; i++)
 495                 if (irq == info->muic_irqs[i].virq)
 496                         irq_type = info->muic_irqs[i].irq;
 497
 498         ret = sm5502_parse_irq(info, irq_type);
 499         if (ret < 0) {
 500                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 501                                     irq_type);
 502                 return IRQ_HANDLED;
 503         }
 504         schedule_work(&info->irq_work);
 505
 506         return IRQ_HANDLED;
 507 }
 508
 509 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 510 {
 511         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 512                                 struct sm5502_muic_info, wq_detcable);
 513         int ret;
 514
 515         /* Notify the state of connector cable or not  */
 516         ret = sm5502_muic_cable_handler(info, true);
 517         if (ret < 0)
 518                 dev_warn(info->dev, "failed to detect cable state\n");
 519 }
 520
 521 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 522 {
 523         unsigned int reg_data, vendor_id, version_id;
 524         int i, ret;
 525
 526         /* To test I2C, Print version_id and vendor_id of SM5502 */
 527         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 528         if (ret) {
 529                 dev_err(info->dev,
 530                         "failed to read DEVICE_ID register: %d\n", ret);
 531                 return;
 532         }
 533
 534         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 535                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 536         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 537                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 538
 539         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 540                             version_id, vendor_id);
 541
 542         /* Initiazle the register of SM5502 device to bring-up */
 543         for (i = 0; i < info->num_reg_data; i++) {
 544                 unsigned int val = 0;
 545
 546                 if (!info->reg_data[i].invert)
 547                         val |= ~info->reg_data[i].val;
 548                 else
 549                         val = info->reg_data[i].val;
 550                 regmap_write(info->regmap, info->reg_data[i].reg, val);
 551         }
 552 }
 553
 554 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
 555                                  const struct i2c_device_id *id)
 556 {
 557         struct device_node *np = i2c->dev.of_node;
 558         struct sm5502_muic_info *info;
 559         int i, ret, irq_flags;
 560
 561         if (!np)
 562                 return -EINVAL;
 563
 564         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 565         if (!info)
 566                 return -ENOMEM;
 567         i2c_set_clientdata(i2c, info);
 568
 569         info->dev = &i2c->dev;
 570         info->i2c = i2c;
 571         info->irq = i2c->irq;
 572         info->muic_irqs = sm5502_muic_irqs;
 573         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
 574         info->reg_data = sm5502_reg_data;
 575         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
 576
 577         mutex_init(&info->mutex);
 578
 579         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 580
 581         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 582         if (IS_ERR(info->regmap)) {
 583                 ret = PTR_ERR(info->regmap);
 584                 dev_err(info->dev, "failed to allocate register map: %d\n",
 585                                    ret);
 586                 return ret;
 587         }
 588
 589         /* Support irq domain for SM5502 MUIC device */
 590         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 591         ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
 592                                   &sm5502_muic_irq_chip, &info->irq_data);
 593         if (ret != 0) {
 594                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 595                                     info->irq, ret);
 596                 return ret;
 597         }
 598
 599         for (i = 0; i < info->num_muic_irqs; i++) {
 600                 struct muic_irq *muic_irq = &info->muic_irqs[i];
 601                 unsigned int virq = 0;
 602
 603                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 604                 if (virq <= 0)
 605                         return -EINVAL;
 606                 muic_irq->virq = virq;
 607
 608                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 609                                                 sm5502_muic_irq_handler,
 610                                                 IRQF_NO_SUSPEND,
 611                                                 muic_irq->name, info);
 612                 if (ret) {
 613                         dev_err(info->dev,
 614                                 "failed: irq request (IRQ: %d, error :%d)\n",
 615                                 muic_irq->irq, ret);
 616                         return ret;
 617                 }
 618         }
 619
 620         /* Allocate extcon device */
 621         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 622         if (IS_ERR(info->edev)) {
 623                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 624                 return -ENOMEM;
 625         }
 626         info->edev->name = np->name;
 627
 628         /* Register extcon device */
 629         ret = devm_extcon_dev_register(info->dev, info->edev);
 630         if (ret) {
 631                 dev_err(info->dev, "failed to register extcon device\n");
 632                 return ret;
 633         }
 634
 635         /*
 636          * Detect accessory after completing the initialization of platform
 637          *
 638          * - Use delayed workqueue to detect cable state and then
 639          * notify cable state to notifiee/platform through uevent.
 640          * After completing the booting of platform, the extcon provider
 641          * driver should notify cable state to upper layer.
 642          */
 643         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 644         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 645                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 646
 647         /* Initialize SM5502 device and print vendor id and version id */
 648         sm5502_init_dev_type(info);
 649
 650         return 0;
 651 }
 652
 653 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
 654 {
 655         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 656
 657         regmap_del_irq_chip(info->irq, info->irq_data);
 658
 659         return 0;
 660 }
 661
 662 static const struct of_device_id sm5502_dt_match[] = {
 663         { .compatible = "siliconmitus,sm5502-muic" },
 664         { },
 665 };
 666
 667 #ifdef CONFIG_PM_SLEEP
 668 static int sm5502_muic_suspend(struct device *dev)
 669 {
 670         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 671         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 672
 673         enable_irq_wake(info->irq);
 674
 675         return 0;
 676 }
 677
 678 static int sm5502_muic_resume(struct device *dev)
 679 {
 680         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 681         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 682
 683         disable_irq_wake(info->irq);
 684
 685         return 0;
 686 }
 687 #endif
 688
 689 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 690                          sm5502_muic_suspend, sm5502_muic_resume);
 691
 692 static const struct i2c_device_id sm5502_i2c_id[] = {
 693         { "sm5502", TYPE_SM5502 },
 694         { }
 695 };
 696 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 697
 698 static struct i2c_driver sm5502_muic_i2c_driver = {
 699         .driver         = {
 700                 .name   = "sm5502",
 701                 .owner  = THIS_MODULE,
 702                 .pm     = &sm5502_muic_pm_ops,
 703                 .of_match_table = sm5502_dt_match,
 704         },
 705         .probe  = sm5022_muic_i2c_probe,
 706         .remove = sm5502_muic_i2c_remove,
 707         .id_table = sm5502_i2c_id,
 708 };
 709
 710 static int __init sm5502_muic_i2c_init(void)
 711 {
 712         return i2c_add_driver(&sm5502_muic_i2c_driver);
 713 }
 714 subsys_initcall(sm5502_muic_i2c_init);
 715
 716 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 717 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 718 MODULE_LICENSE("GPL");