drivers/extcon/extcon-sm5502.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
   4  *
   5  * Copyright (c) 2014 Samsung Electronics Co., Ltd
   6  * Author: Chanwoo Choi <cw00.choi@samsung.com>
   7  */
   8
   9 #include <linux/err.h>
  10 #include <linux/i2c.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/irqdomain.h>
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/regmap.h>
  17 #include <linux/slab.h>
  18 #include <linux/extcon-provider.h>
  19
  20 #include "extcon-sm5502.h"
  21
  22 #define DELAY_MS_DEFAULT                17000   /* unit: millisecond */
  23
  24 struct muic_irq {
  25         unsigned int irq;
  26         const char *name;
  27         unsigned int virq;
  28 };
  29
  30 struct reg_data {
  31         u8 reg;
  32         unsigned int val;
  33         bool invert;
  34 };
  35
  36 struct sm5502_muic_info {
  37         struct device *dev;
  38         struct extcon_dev *edev;
  39
  40         struct i2c_client *i2c;
  41         struct regmap *regmap;
  42
  43         struct regmap_irq_chip_data *irq_data;
  44         struct muic_irq *muic_irqs;
  45         unsigned int num_muic_irqs;
  46         int irq;
  47         bool irq_attach;
  48         bool irq_detach;
  49         struct work_struct irq_work;
  50
  51         struct reg_data *reg_data;
  52         unsigned int num_reg_data;
  53
  54         struct mutex mutex;
  55
  56         /*
  57          * Use delayed workqueue to detect cable state and then
  58          * notify cable state to notifiee/platform through uevent.
  59          * After completing the booting of platform, the extcon provider
  60          * driver should notify cable state to upper layer.
  61          */
  62         struct delayed_work wq_detcable;
  63 };
  64
  65 /* Default value of SM5502 register to bring up MUIC device. */
  66 static struct reg_data sm5502_reg_data[] = {
  67         {
  68                 .reg = SM5502_REG_RESET,
  69                 .val = SM5502_REG_RESET_MASK,
  70                 .invert = true,
  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 /* List of detectable cables */
  94 static const unsigned int sm5502_extcon_cable[] = {
  95         EXTCON_USB,
  96         EXTCON_USB_HOST,
  97         EXTCON_CHG_USB_SDP,
  98         EXTCON_CHG_USB_DCP,
  99         EXTCON_NONE,
 100 };
 101
 102 /* Define supported accessory type */
 103 enum sm5502_muic_acc_type {
 104         SM5502_MUIC_ADC_GROUND = 0x0,
 105         SM5502_MUIC_ADC_SEND_END_BUTTON,
 106         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
 107         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
 108         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
 109         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
 110         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
 111         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
 112         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
 113         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
 114         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
 115         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
 116         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
 117         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
 118         SM5502_MUIC_ADC_RESERVED_ACC_1,
 119         SM5502_MUIC_ADC_RESERVED_ACC_2,
 120         SM5502_MUIC_ADC_RESERVED_ACC_3,
 121         SM5502_MUIC_ADC_RESERVED_ACC_4,
 122         SM5502_MUIC_ADC_RESERVED_ACC_5,
 123         SM5502_MUIC_ADC_AUDIO_TYPE2,
 124         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
 125         SM5502_MUIC_ADC_TTY_CONVERTER,
 126         SM5502_MUIC_ADC_UART_CABLE,
 127         SM5502_MUIC_ADC_TYPE1_CHARGER,
 128         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
 129         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
 130         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
 131         SM5502_MUIC_ADC_TYPE2_CHARGER,
 132         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
 133         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
 134         SM5502_MUIC_ADC_AUDIO_TYPE1,
 135         SM5502_MUIC_ADC_OPEN = 0x1f,
 136
 137         /*
 138          * The below accessories have same ADC value (0x1f or 0x1e).
 139          * So, Device type1 is used to separate specific accessory.
 140          */
 141                                                         /* |---------|--ADC| */
 142                                                         /* |    [7:5]|[4:0]| */
 143         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 144         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 145                                                         /* |Dev Type1|--ADC| */
 146         SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80,          /* |      100|00000| */
 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, 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
 295         switch (cable_type) {
 296         case SM5502_MUIC_ADC_GROUND:
 297                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 298                                   &dev_type1);
 299                 if (ret) {
 300                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 301                         return ret;
 302                 }
 303
 304                 switch (dev_type1) {
 305                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 306                         cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
 307                         break;
 308                 default:
 309                         dev_dbg(info->dev,
 310                                 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
 311                                 adc, dev_type1);
 312                         return -EINVAL;
 313                 }
 314                 break;
 315         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 316         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 317         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 318         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 319         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 320         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 321         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 322         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 323         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 324         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 325         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 326         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 327         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 328         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 329         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 330         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 331         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 332         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 333         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 334         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 335         case SM5502_MUIC_ADC_TTY_CONVERTER:
 336         case SM5502_MUIC_ADC_UART_CABLE:
 337         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 338         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 339         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 340         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 341         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 342         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 343         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 344                 break;
 345         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 346                 /*
 347                  * Check whether cable type is
 348                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 349                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 350                  * by using Button event.
 351                  */
 352                 break;
 353         case SM5502_MUIC_ADC_OPEN:
 354                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 355                                   &dev_type1);
 356                 if (ret) {
 357                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 358                         return ret;
 359                 }
 360
 361                 switch (dev_type1) {
 362                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 363                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 364                         break;
 365                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 366                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 367                         break;
 368                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 369                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 370                         break;
 371                 default:
 372                         dev_dbg(info->dev,
 373                                 "cannot identify the cable type: adc(0x%x)\n",
 374                                 adc);
 375                         return -EINVAL;
 376                 }
 377                 break;
 378         default:
 379                 dev_err(info->dev,
 380                         "failed to identify the cable type: adc(0x%x)\n", adc);
 381                 return -EINVAL;
 382         }
 383
 384         return cable_type;
 385 }
 386
 387 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 388                                      bool attached)
 389 {
 390         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 391         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 392         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 393         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 394         unsigned int id;
 395         int ret;
 396
 397         /* Get the type of attached or detached cable */
 398         if (attached)
 399                 cable_type = sm5502_muic_get_cable_type(info);
 400         else
 401                 cable_type = prev_cable_type;
 402         prev_cable_type = cable_type;
 403
 404         switch (cable_type) {
 405         case SM5502_MUIC_ADC_OPEN_USB:
 406                 id      = EXTCON_USB;
 407                 con_sw  = DM_DP_SWITCH_USB;
 408                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 409                 break;
 410         case SM5502_MUIC_ADC_OPEN_TA:
 411                 id      = EXTCON_CHG_USB_DCP;
 412                 con_sw  = DM_DP_SWITCH_OPEN;
 413                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 414                 break;
 415         case SM5502_MUIC_ADC_GROUND_USB_OTG:
 416         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 417                 id      = EXTCON_USB_HOST;
 418                 con_sw  = DM_DP_SWITCH_USB;
 419                 vbus_sw = VBUSIN_SWITCH_OPEN;
 420                 break;
 421         default:
 422                 dev_dbg(info->dev,
 423                         "cannot handle this cable_type (0x%x)\n", cable_type);
 424                 return 0;
 425         }
 426
 427         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 428         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 429         if (ret < 0)
 430                 return ret;
 431
 432         /* Change the state of external accessory */
 433         extcon_set_state_sync(info->edev, id, attached);
 434         if (id == EXTCON_USB)
 435                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 436                                         attached);
 437
 438         return 0;
 439 }
 440
 441 static void sm5502_muic_irq_work(struct work_struct *work)
 442 {
 443         struct sm5502_muic_info *info = container_of(work,
 444                         struct sm5502_muic_info, irq_work);
 445         int ret = 0;
 446
 447         if (!info->edev)
 448                 return;
 449
 450         mutex_lock(&info->mutex);
 451
 452         /* Detect attached or detached cables */
 453         if (info->irq_attach) {
 454                 ret = sm5502_muic_cable_handler(info, true);
 455                 info->irq_attach = false;
 456         }
 457         if (info->irq_detach) {
 458                 ret = sm5502_muic_cable_handler(info, false);
 459                 info->irq_detach = false;
 460         }
 461
 462         if (ret < 0)
 463                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 464
 465         mutex_unlock(&info->mutex);
 466 }
 467
 468 /*
 469  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 470  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 471  */
 472 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 473 {
 474         switch (irq_type) {
 475         case SM5502_IRQ_INT1_ATTACH:
 476                 info->irq_attach = true;
 477                 break;
 478         case SM5502_IRQ_INT1_DETACH:
 479                 info->irq_detach = true;
 480                 break;
 481         case SM5502_IRQ_INT1_KP:
 482         case SM5502_IRQ_INT1_LKP:
 483         case SM5502_IRQ_INT1_LKR:
 484         case SM5502_IRQ_INT1_OVP_EVENT:
 485         case SM5502_IRQ_INT1_OCP_EVENT:
 486         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 487         case SM5502_IRQ_INT2_VBUS_DET:
 488         case SM5502_IRQ_INT2_REV_ACCE:
 489         case SM5502_IRQ_INT2_ADC_CHG:
 490         case SM5502_IRQ_INT2_STUCK_KEY:
 491         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 492         case SM5502_IRQ_INT2_MHL:
 493         default:
 494                 break;
 495         }
 496
 497         return 0;
 498 }
 499
 500 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 501 {
 502         struct sm5502_muic_info *info = data;
 503         int i, irq_type = -1, ret;
 504
 505         for (i = 0; i < info->num_muic_irqs; i++)
 506                 if (irq == info->muic_irqs[i].virq)
 507                         irq_type = info->muic_irqs[i].irq;
 508
 509         ret = sm5502_parse_irq(info, irq_type);
 510         if (ret < 0) {
 511                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 512                                     irq_type);
 513                 return IRQ_HANDLED;
 514         }
 515         schedule_work(&info->irq_work);
 516
 517         return IRQ_HANDLED;
 518 }
 519
 520 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 521 {
 522         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 523                                 struct sm5502_muic_info, wq_detcable);
 524         int ret;
 525
 526         /* Notify the state of connector cable or not  */
 527         ret = sm5502_muic_cable_handler(info, true);
 528         if (ret < 0)
 529                 dev_warn(info->dev, "failed to detect cable state\n");
 530 }
 531
 532 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 533 {
 534         unsigned int reg_data, vendor_id, version_id;
 535         int i, ret;
 536
 537         /* To test I2C, Print version_id and vendor_id of SM5502 */
 538         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 539         if (ret) {
 540                 dev_err(info->dev,
 541                         "failed to read DEVICE_ID register: %d\n", ret);
 542                 return;
 543         }
 544
 545         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 546                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 547         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 548                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 549
 550         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 551                             version_id, vendor_id);
 552
 553         /* Initiazle the register of SM5502 device to bring-up */
 554         for (i = 0; i < info->num_reg_data; i++) {
 555                 unsigned int val = 0;
 556
 557                 if (!info->reg_data[i].invert)
 558                         val |= ~info->reg_data[i].val;
 559                 else
 560                         val = info->reg_data[i].val;
 561                 regmap_write(info->regmap, info->reg_data[i].reg, val);
 562         }
 563 }
 564
 565 static int sm5022_muic_i2c_probe(struct i2c_client *i2c)
 566 {
 567         struct device_node *np = i2c->dev.of_node;
 568         struct sm5502_muic_info *info;
 569         int i, ret, irq_flags;
 570
 571         if (!np)
 572                 return -EINVAL;
 573
 574         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 575         if (!info)
 576                 return -ENOMEM;
 577         i2c_set_clientdata(i2c, info);
 578
 579         info->dev = &i2c->dev;
 580         info->i2c = i2c;
 581         info->irq = i2c->irq;
 582         info->muic_irqs = sm5502_muic_irqs;
 583         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
 584         info->reg_data = sm5502_reg_data;
 585         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
 586
 587         mutex_init(&info->mutex);
 588
 589         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 590
 591         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 592         if (IS_ERR(info->regmap)) {
 593                 ret = PTR_ERR(info->regmap);
 594                 dev_err(info->dev, "failed to allocate register map: %d\n",
 595                                    ret);
 596                 return ret;
 597         }
 598
 599         /* Support irq domain for SM5502 MUIC device */
 600         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 601         ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq, irq_flags,
 602                                        0, &sm5502_muic_irq_chip, &info->irq_data);
 603         if (ret != 0) {
 604                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 605                                     info->irq, ret);
 606                 return ret;
 607         }
 608
 609         for (i = 0; i < info->num_muic_irqs; i++) {
 610                 struct muic_irq *muic_irq = &info->muic_irqs[i];
 611                 int virq = 0;
 612
 613                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 614                 if (virq <= 0)
 615                         return -EINVAL;
 616                 muic_irq->virq = virq;
 617
 618                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 619                                                 sm5502_muic_irq_handler,
 620                                                 IRQF_NO_SUSPEND | IRQF_ONESHOT,
 621                                                 muic_irq->name, info);
 622                 if (ret) {
 623                         dev_err(info->dev,
 624                                 "failed: irq request (IRQ: %d, error :%d)\n",
 625                                 muic_irq->irq, ret);
 626                         return ret;
 627                 }
 628         }
 629
 630         /* Allocate extcon device */
 631         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 632         if (IS_ERR(info->edev)) {
 633                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 634                 return -ENOMEM;
 635         }
 636
 637         /* Register extcon device */
 638         ret = devm_extcon_dev_register(info->dev, info->edev);
 639         if (ret) {
 640                 dev_err(info->dev, "failed to register extcon device\n");
 641                 return ret;
 642         }
 643
 644         /*
 645          * Detect accessory after completing the initialization of platform
 646          *
 647          * - Use delayed workqueue to detect cable state and then
 648          * notify cable state to notifiee/platform through uevent.
 649          * After completing the booting of platform, the extcon provider
 650          * driver should notify cable state to upper layer.
 651          */
 652         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 653         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 654                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 655
 656         /* Initialize SM5502 device and print vendor id and version id */
 657         sm5502_init_dev_type(info);
 658
 659         return 0;
 660 }
 661
 662 static const struct of_device_id sm5502_dt_match[] = {
 663         { .compatible = "siliconmitus,sm5502-muic" },
 664         { },
 665 };
 666 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 667
 668 #ifdef CONFIG_PM_SLEEP
 669 static int sm5502_muic_suspend(struct device *dev)
 670 {
 671         struct i2c_client *i2c = to_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 = to_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                 .pm     = &sm5502_muic_pm_ops,
 703                 .of_match_table = sm5502_dt_match,
 704         },
 705         .probe_new = sm5022_muic_i2c_probe,
 706         .id_table = sm5502_i2c_id,
 707 };
 708
 709 static int __init sm5502_muic_i2c_init(void)
 710 {
 711         return i2c_add_driver(&sm5502_muic_i2c_driver);
 712 }
 713 subsys_initcall(sm5502_muic_i2c_init);
 714
 715 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 716 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 717 MODULE_LICENSE("GPL");