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 static const unsigned int sm5502_extcon_cable[] = {
  96         EXTCON_USB,
  97         EXTCON_USB_HOST,
  98         EXTCON_CHG_USB_SDP,
  99         EXTCON_CHG_USB_DCP,
 100         EXTCON_NONE,
 101 };
 102
 103 /* Define supported accessory type */
 104 enum sm5502_muic_acc_type {
 105         SM5502_MUIC_ADC_GROUND = 0x0,
 106         SM5502_MUIC_ADC_SEND_END_BUTTON,
 107         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
 108         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
 109         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
 110         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
 111         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
 112         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
 113         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
 114         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
 115         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
 116         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
 117         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
 118         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
 119         SM5502_MUIC_ADC_RESERVED_ACC_1,
 120         SM5502_MUIC_ADC_RESERVED_ACC_2,
 121         SM5502_MUIC_ADC_RESERVED_ACC_3,
 122         SM5502_MUIC_ADC_RESERVED_ACC_4,
 123         SM5502_MUIC_ADC_RESERVED_ACC_5,
 124         SM5502_MUIC_ADC_AUDIO_TYPE2,
 125         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
 126         SM5502_MUIC_ADC_TTY_CONVERTER,
 127         SM5502_MUIC_ADC_UART_CABLE,
 128         SM5502_MUIC_ADC_TYPE1_CHARGER,
 129         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
 130         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
 131         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
 132         SM5502_MUIC_ADC_TYPE2_CHARGER,
 133         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
 134         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
 135         SM5502_MUIC_ADC_AUDIO_TYPE1,
 136         SM5502_MUIC_ADC_OPEN = 0x1f,
 137
 138         /*
 139          * The below accessories have same ADC value (0x1f or 0x1e).
 140          * So, Device type1 is used to separate specific accessory.
 141          */
 142                                                         /* |---------|--ADC| */
 143                                                         /* |    [7:5]|[4:0]| */
 144         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 145         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 146                                                         /* |Dev Type1|--ADC| */
 147         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
 148         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
 149         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
 150 };
 151
 152 /* List of supported interrupt for SM5502 */
 153 static struct muic_irq sm5502_muic_irqs[] = {
 154         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
 155         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
 156         { SM5502_IRQ_INT1_KP,           "muic-kp" },
 157         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
 158         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
 159         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 160         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
 161         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
 162         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
 163         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
 164         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
 165         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
 166         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
 167         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
 168 };
 169
 170 /* Define interrupt list of SM5502 to register regmap_irq */
 171 static const struct regmap_irq sm5502_irqs[] = {
 172         /* INT1 interrupts */
 173         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
 174         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
 175         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
 176         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
 177         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
 178         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
 179         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
 180         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
 181
 182         /* INT2 interrupts */
 183         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
 184         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
 185         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
 186         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
 187         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
 188         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
 189 };
 190
 191 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
 192         .name                   = "sm5502",
 193         .status_base            = SM5502_REG_INT1,
 194         .mask_base              = SM5502_REG_INTMASK1,
 195         .mask_invert            = false,
 196         .num_regs               = 2,
 197         .irqs                   = sm5502_irqs,
 198         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
 199 };
 200
 201 /* Define regmap configuration of SM5502 for I2C communication  */
 202 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
 203 {
 204         switch (reg) {
 205         case SM5502_REG_INTMASK1:
 206         case SM5502_REG_INTMASK2:
 207                 return true;
 208         default:
 209                 break;
 210         }
 211         return false;
 212 }
 213
 214 static const struct regmap_config sm5502_muic_regmap_config = {
 215         .reg_bits       = 8,
 216         .val_bits       = 8,
 217         .volatile_reg   = sm5502_muic_volatile_reg,
 218         .max_register   = SM5502_REG_END,
 219 };
 220
 221 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
 222 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 223                                 unsigned int con_sw, unsigned int vbus_sw,
 224                                 bool attached)
 225 {
 226         int ret;
 227
 228         if (!attached) {
 229                 con_sw  = DM_DP_SWITCH_OPEN;
 230                 vbus_sw = VBUSIN_SWITCH_OPEN;
 231         }
 232
 233         switch (con_sw) {
 234         case DM_DP_SWITCH_OPEN:
 235         case DM_DP_SWITCH_USB:
 236         case DM_DP_SWITCH_AUDIO:
 237         case DM_DP_SWITCH_UART:
 238                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 239                                          SM5502_REG_MANUAL_SW1_DP_MASK |
 240                                          SM5502_REG_MANUAL_SW1_DM_MASK,
 241                                          con_sw);
 242                 if (ret < 0) {
 243                         dev_err(info->dev,
 244                                 "cannot update DM_CON/DP_CON switch\n");
 245                         return ret;
 246                 }
 247                 break;
 248         default:
 249                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
 250                                 con_sw);
 251                 return -EINVAL;
 252         };
 253
 254         switch (vbus_sw) {
 255         case VBUSIN_SWITCH_OPEN:
 256         case VBUSIN_SWITCH_VBUSOUT:
 257         case VBUSIN_SWITCH_MIC:
 258         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
 259                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 260                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
 261                                          vbus_sw);
 262                 if (ret < 0) {
 263                         dev_err(info->dev,
 264                                 "cannot update VBUSIN switch\n");
 265                         return ret;
 266                 }
 267                 break;
 268         default:
 269                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
 270                 return -EINVAL;
 271         };
 272
 273         return 0;
 274 }
 275
 276 /* Return cable type of attached or detached accessories */
 277 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 278 {
 279         unsigned int cable_type = -1, adc, dev_type1;
 280         int ret;
 281
 282         /* Read ADC value according to external cable or button */
 283         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
 284         if (ret) {
 285                 dev_err(info->dev, "failed to read ADC register\n");
 286                 return ret;
 287         }
 288
 289         /*
 290          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
 291          * connected with to MUIC device.
 292          */
 293         cable_type = adc & SM5502_REG_ADC_MASK;
 294         if (cable_type == SM5502_MUIC_ADC_GROUND)
 295                 return SM5502_MUIC_ADC_GROUND;
 296
 297         switch (cable_type) {
 298         case SM5502_MUIC_ADC_GROUND:
 299         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 300         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 301         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 302         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 303         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 304         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 305         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 306         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 307         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 308         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 309         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 310         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 311         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 312         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 313         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 314         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 315         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 316         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 317         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 318         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 319         case SM5502_MUIC_ADC_TTY_CONVERTER:
 320         case SM5502_MUIC_ADC_UART_CABLE:
 321         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 322         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 323         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 324         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 325         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 326         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 327         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 328                 break;
 329         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 330                 /*
 331                  * Check whether cable type is
 332                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 333                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 334                  * by using Button event.
 335                  */
 336                 break;
 337         case SM5502_MUIC_ADC_OPEN:
 338                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 339                                   &dev_type1);
 340                 if (ret) {
 341                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 342                         return ret;
 343                 }
 344
 345                 switch (dev_type1) {
 346                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 347                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 348                         break;
 349                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 350                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 351                         break;
 352                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 353                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 354                         break;
 355                 default:
 356                         dev_dbg(info->dev,
 357                                 "cannot identify the cable type: adc(0x%x)\n",
 358                                 adc);
 359                         return -EINVAL;
 360                 };
 361                 break;
 362         default:
 363                 dev_err(info->dev,
 364                         "failed to identify the cable type: adc(0x%x)\n", adc);
 365                 return -EINVAL;
 366         };
 367
 368         return cable_type;
 369 }
 370
 371 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 372                                      bool attached)
 373 {
 374         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 375         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 376         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 377         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 378         unsigned int id;
 379         int ret;
 380
 381         /* Get the type of attached or detached cable */
 382         if (attached)
 383                 cable_type = sm5502_muic_get_cable_type(info);
 384         else
 385                 cable_type = prev_cable_type;
 386         prev_cable_type = cable_type;
 387
 388         switch (cable_type) {
 389         case SM5502_MUIC_ADC_OPEN_USB:
 390                 id      = EXTCON_USB;
 391                 con_sw  = DM_DP_SWITCH_USB;
 392                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 393                 break;
 394         case SM5502_MUIC_ADC_OPEN_TA:
 395                 id      = EXTCON_CHG_USB_DCP;
 396                 con_sw  = DM_DP_SWITCH_OPEN;
 397                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 398                 break;
 399         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 400                 id      = EXTCON_USB_HOST;
 401                 con_sw  = DM_DP_SWITCH_USB;
 402                 vbus_sw = VBUSIN_SWITCH_OPEN;
 403                 break;
 404         default:
 405                 dev_dbg(info->dev,
 406                         "cannot handle this cable_type (0x%x)\n", cable_type);
 407                 return 0;
 408         };
 409
 410         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 411         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 412         if (ret < 0)
 413                 return ret;
 414
 415         /* Change the state of external accessory */
 416         extcon_set_state_sync(info->edev, id, attached);
 417         if (id == EXTCON_USB)
 418                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 419                                         attached);
 420
 421         return 0;
 422 }
 423
 424 static void sm5502_muic_irq_work(struct work_struct *work)
 425 {
 426         struct sm5502_muic_info *info = container_of(work,
 427                         struct sm5502_muic_info, irq_work);
 428         int ret = 0;
 429
 430         if (!info->edev)
 431                 return;
 432
 433         mutex_lock(&info->mutex);
 434
 435         /* Detect attached or detached cables */
 436         if (info->irq_attach) {
 437                 ret = sm5502_muic_cable_handler(info, true);
 438                 info->irq_attach = false;
 439         }
 440         if (info->irq_detach) {
 441                 ret = sm5502_muic_cable_handler(info, false);
 442                 info->irq_detach = false;
 443         }
 444
 445         if (ret < 0)
 446                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 447
 448         mutex_unlock(&info->mutex);
 449 }
 450
 451 /*
 452  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 453  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 454  */
 455 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 456 {
 457         switch (irq_type) {
 458         case SM5502_IRQ_INT1_ATTACH:
 459                 info->irq_attach = true;
 460                 break;
 461         case SM5502_IRQ_INT1_DETACH:
 462                 info->irq_detach = true;
 463                 break;
 464         case SM5502_IRQ_INT1_KP:
 465         case SM5502_IRQ_INT1_LKP:
 466         case SM5502_IRQ_INT1_LKR:
 467         case SM5502_IRQ_INT1_OVP_EVENT:
 468         case SM5502_IRQ_INT1_OCP_EVENT:
 469         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 470         case SM5502_IRQ_INT2_VBUS_DET:
 471         case SM5502_IRQ_INT2_REV_ACCE:
 472         case SM5502_IRQ_INT2_ADC_CHG:
 473         case SM5502_IRQ_INT2_STUCK_KEY:
 474         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 475         case SM5502_IRQ_INT2_MHL:
 476         default:
 477                 break;
 478         }
 479
 480         return 0;
 481 }
 482
 483 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 484 {
 485         struct sm5502_muic_info *info = data;
 486         int i, irq_type = -1, ret;
 487
 488         for (i = 0; i < info->num_muic_irqs; i++)
 489                 if (irq == info->muic_irqs[i].virq)
 490                         irq_type = info->muic_irqs[i].irq;
 491
 492         ret = sm5502_parse_irq(info, irq_type);
 493         if (ret < 0) {
 494                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 495                                     irq_type);
 496                 return IRQ_HANDLED;
 497         }
 498         schedule_work(&info->irq_work);
 499
 500         return IRQ_HANDLED;
 501 }
 502
 503 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 504 {
 505         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 506                                 struct sm5502_muic_info, wq_detcable);
 507         int ret;
 508
 509         /* Notify the state of connector cable or not  */
 510         ret = sm5502_muic_cable_handler(info, true);
 511         if (ret < 0)
 512                 dev_warn(info->dev, "failed to detect cable state\n");
 513 }
 514
 515 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 516 {
 517         unsigned int reg_data, vendor_id, version_id;
 518         int i, ret;
 519
 520         /* To test I2C, Print version_id and vendor_id of SM5502 */
 521         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 522         if (ret) {
 523                 dev_err(info->dev,
 524                         "failed to read DEVICE_ID register: %d\n", ret);
 525                 return;
 526         }
 527
 528         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 529                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 530         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 531                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 532
 533         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 534                             version_id, vendor_id);
 535
 536         /* Initiazle the register of SM5502 device to bring-up */
 537         for (i = 0; i < info->num_reg_data; i++) {
 538                 unsigned int val = 0;
 539
 540                 if (!info->reg_data[i].invert)
 541                         val |= ~info->reg_data[i].val;
 542                 else
 543                         val = info->reg_data[i].val;
 544                 regmap_write(info->regmap, info->reg_data[i].reg, val);
 545         }
 546 }
 547
 548 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
 549                                  const struct i2c_device_id *id)
 550 {
 551         struct device_node *np = i2c->dev.of_node;
 552         struct sm5502_muic_info *info;
 553         int i, ret, irq_flags;
 554
 555         if (!np)
 556                 return -EINVAL;
 557
 558         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 559         if (!info)
 560                 return -ENOMEM;
 561         i2c_set_clientdata(i2c, info);
 562
 563         info->dev = &i2c->dev;
 564         info->i2c = i2c;
 565         info->irq = i2c->irq;
 566         info->muic_irqs = sm5502_muic_irqs;
 567         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
 568         info->reg_data = sm5502_reg_data;
 569         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
 570
 571         mutex_init(&info->mutex);
 572
 573         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 574
 575         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 576         if (IS_ERR(info->regmap)) {
 577                 ret = PTR_ERR(info->regmap);
 578                 dev_err(info->dev, "failed to allocate register map: %d\n",
 579                                    ret);
 580                 return ret;
 581         }
 582
 583         /* Support irq domain for SM5502 MUIC device */
 584         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 585         ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
 586                                   &sm5502_muic_irq_chip, &info->irq_data);
 587         if (ret != 0) {
 588                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 589                                     info->irq, ret);
 590                 return ret;
 591         }
 592
 593         for (i = 0; i < info->num_muic_irqs; i++) {
 594                 struct muic_irq *muic_irq = &info->muic_irqs[i];
 595                 int virq = 0;
 596
 597                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 598                 if (virq <= 0)
 599                         return -EINVAL;
 600                 muic_irq->virq = virq;
 601
 602                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 603                                                 sm5502_muic_irq_handler,
 604                                                 IRQF_NO_SUSPEND,
 605                                                 muic_irq->name, info);
 606                 if (ret) {
 607                         dev_err(info->dev,
 608                                 "failed: irq request (IRQ: %d, error :%d)\n",
 609                                 muic_irq->irq, ret);
 610                         return ret;
 611                 }
 612         }
 613
 614         /* Allocate extcon device */
 615         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 616         if (IS_ERR(info->edev)) {
 617                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 618                 return -ENOMEM;
 619         }
 620
 621         /* Register extcon device */
 622         ret = devm_extcon_dev_register(info->dev, info->edev);
 623         if (ret) {
 624                 dev_err(info->dev, "failed to register extcon device\n");
 625                 return ret;
 626         }
 627
 628         /*
 629          * Detect accessory after completing the initialization of platform
 630          *
 631          * - Use delayed workqueue to detect cable state and then
 632          * notify cable state to notifiee/platform through uevent.
 633          * After completing the booting of platform, the extcon provider
 634          * driver should notify cable state to upper layer.
 635          */
 636         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 637         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 638                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 639
 640         /* Initialize SM5502 device and print vendor id and version id */
 641         sm5502_init_dev_type(info);
 642
 643         return 0;
 644 }
 645
 646 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
 647 {
 648         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 649
 650         regmap_del_irq_chip(info->irq, info->irq_data);
 651
 652         return 0;
 653 }
 654
 655 static const struct of_device_id sm5502_dt_match[] = {
 656         { .compatible = "siliconmitus,sm5502-muic" },
 657         { },
 658 };
 659 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 660
 661 #ifdef CONFIG_PM_SLEEP
 662 static int sm5502_muic_suspend(struct device *dev)
 663 {
 664         struct i2c_client *i2c = to_i2c_client(dev);
 665         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 666
 667         enable_irq_wake(info->irq);
 668
 669         return 0;
 670 }
 671
 672 static int sm5502_muic_resume(struct device *dev)
 673 {
 674         struct i2c_client *i2c = to_i2c_client(dev);
 675         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 676
 677         disable_irq_wake(info->irq);
 678
 679         return 0;
 680 }
 681 #endif
 682
 683 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 684                          sm5502_muic_suspend, sm5502_muic_resume);
 685
 686 static const struct i2c_device_id sm5502_i2c_id[] = {
 687         { "sm5502", TYPE_SM5502 },
 688         { }
 689 };
 690 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 691
 692 static struct i2c_driver sm5502_muic_i2c_driver = {
 693         .driver         = {
 694                 .name   = "sm5502",
 695                 .pm     = &sm5502_muic_pm_ops,
 696                 .of_match_table = sm5502_dt_match,
 697         },
 698         .probe  = sm5022_muic_i2c_probe,
 699         .remove = sm5502_muic_i2c_remove,
 700         .id_table = sm5502_i2c_id,
 701 };
 702
 703 static int __init sm5502_muic_i2c_init(void)
 704 {
 705         return i2c_add_driver(&sm5502_muic_i2c_driver);
 706 }
 707 subsys_initcall(sm5502_muic_i2c_init);
 708
 709 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 710 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 711 MODULE_LICENSE("GPL");