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