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         const struct sm5502_type *type;
  44         struct regmap_irq_chip_data *irq_data;
  45         int irq;
  46         bool irq_attach;
  47         bool irq_detach;
  48         struct work_struct irq_work;
  49
  50         struct mutex mutex;
  51
  52         /*
  53          * Use delayed workqueue to detect cable state and then
  54          * notify cable state to notifiee/platform through uevent.
  55          * After completing the booting of platform, the extcon provider
  56          * driver should notify cable state to upper layer.
  57          */
  58         struct delayed_work wq_detcable;
  59 };
  60
  61 struct sm5502_type {
  62         struct muic_irq *muic_irqs;
  63         unsigned int num_muic_irqs;
  64         const struct regmap_irq_chip *irq_chip;
  65
  66         struct reg_data *reg_data;
  67         unsigned int num_reg_data;
  68
  69         unsigned int otg_dev_type1;
  70         int (*parse_irq)(struct sm5502_muic_info *info, int irq_type);
  71 };
  72
  73 /* Default value of SM5502 register to bring up MUIC device. */
  74 static struct reg_data sm5502_reg_data[] = {
  75         {
  76                 .reg = SM5502_REG_RESET,
  77                 .val = SM5502_REG_RESET_MASK,
  78                 .invert = true,
  79         }, {
  80                 .reg = SM5502_REG_CONTROL,
  81                 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
  82                 .invert = false,
  83         }, {
  84                 .reg = SM5502_REG_INTMASK1,
  85                 .val = SM5502_REG_INTM1_KP_MASK
  86                         | SM5502_REG_INTM1_LKP_MASK
  87                         | SM5502_REG_INTM1_LKR_MASK,
  88                 .invert = true,
  89         }, {
  90                 .reg = SM5502_REG_INTMASK2,
  91                 .val = SM5502_REG_INTM2_VBUS_DET_MASK
  92                         | SM5502_REG_INTM2_REV_ACCE_MASK
  93                         | SM5502_REG_INTM2_ADC_CHG_MASK
  94                         | SM5502_REG_INTM2_STUCK_KEY_MASK
  95                         | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
  96                         | SM5502_REG_INTM2_MHL_MASK,
  97                 .invert = true,
  98         },
  99 };
 100
 101 /* Default value of SM5504 register to bring up MUIC device. */
 102 static struct reg_data sm5504_reg_data[] = {
 103         {
 104                 .reg = SM5502_REG_RESET,
 105                 .val = SM5502_REG_RESET_MASK,
 106                 .invert = true,
 107         }, {
 108                 .reg = SM5502_REG_INTMASK1,
 109                 .val = SM5504_REG_INTM1_ATTACH_MASK
 110                         | SM5504_REG_INTM1_DETACH_MASK,
 111                 .invert = false,
 112         }, {
 113                 .reg = SM5502_REG_INTMASK2,
 114                 .val = SM5504_REG_INTM2_RID_CHG_MASK
 115                         | SM5504_REG_INTM2_UVLO_MASK
 116                         | SM5504_REG_INTM2_POR_MASK,
 117                 .invert = true,
 118         }, {
 119                 .reg = SM5502_REG_CONTROL,
 120                 .val = SM5502_REG_CONTROL_MANUAL_SW_MASK
 121                         | SM5504_REG_CONTROL_CHGTYP_MASK
 122                         | SM5504_REG_CONTROL_USBCHDEN_MASK
 123                         | SM5504_REG_CONTROL_ADC_EN_MASK,
 124                 .invert = true,
 125         },
 126 };
 127
 128 /* List of detectable cables */
 129 static const unsigned int sm5502_extcon_cable[] = {
 130         EXTCON_USB,
 131         EXTCON_USB_HOST,
 132         EXTCON_CHG_USB_SDP,
 133         EXTCON_CHG_USB_DCP,
 134         EXTCON_NONE,
 135 };
 136
 137 /* Define supported accessory type */
 138 enum sm5502_muic_acc_type {
 139         SM5502_MUIC_ADC_GROUND = 0x0,
 140         SM5502_MUIC_ADC_SEND_END_BUTTON,
 141         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
 142         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
 143         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
 144         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
 145         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
 146         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
 147         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
 148         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
 149         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
 150         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
 151         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
 152         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
 153         SM5502_MUIC_ADC_RESERVED_ACC_1,
 154         SM5502_MUIC_ADC_RESERVED_ACC_2,
 155         SM5502_MUIC_ADC_RESERVED_ACC_3,
 156         SM5502_MUIC_ADC_RESERVED_ACC_4,
 157         SM5502_MUIC_ADC_RESERVED_ACC_5,
 158         SM5502_MUIC_ADC_AUDIO_TYPE2,
 159         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
 160         SM5502_MUIC_ADC_TTY_CONVERTER,
 161         SM5502_MUIC_ADC_UART_CABLE,
 162         SM5502_MUIC_ADC_TYPE1_CHARGER,
 163         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
 164         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
 165         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
 166         SM5502_MUIC_ADC_TYPE2_CHARGER,
 167         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
 168         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
 169         SM5502_MUIC_ADC_AUDIO_TYPE1,
 170         SM5502_MUIC_ADC_OPEN = 0x1f,
 171
 172         /*
 173          * The below accessories have same ADC value (0x1f or 0x1e).
 174          * So, Device type1 is used to separate specific accessory.
 175          */
 176                                                         /* |---------|--ADC| */
 177                                                         /* |    [7:5]|[4:0]| */
 178         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 179         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 180                                                         /* |Dev Type1|--ADC| */
 181         SM5502_MUIC_ADC_GROUND_USB_OTG = 0x80,          /* |      100|00000| */
 182         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
 183         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
 184         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
 185 };
 186
 187 /* List of supported interrupt for SM5502 */
 188 static struct muic_irq sm5502_muic_irqs[] = {
 189         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
 190         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
 191         { SM5502_IRQ_INT1_KP,           "muic-kp" },
 192         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
 193         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
 194         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 195         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
 196         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
 197         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
 198         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
 199         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
 200         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
 201         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
 202         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
 203 };
 204
 205 /* Define interrupt list of SM5502 to register regmap_irq */
 206 static const struct regmap_irq sm5502_irqs[] = {
 207         /* INT1 interrupts */
 208         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
 209         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
 210         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
 211         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
 212         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
 213         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
 214         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
 215         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
 216
 217         /* INT2 interrupts */
 218         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
 219         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
 220         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
 221         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
 222         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
 223         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
 224 };
 225
 226 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
 227         .name                   = "sm5502",
 228         .status_base            = SM5502_REG_INT1,
 229         .mask_base              = SM5502_REG_INTMASK1,
 230         .mask_invert            = false,
 231         .num_regs               = 2,
 232         .irqs                   = sm5502_irqs,
 233         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
 234 };
 235
 236 /* List of supported interrupt for SM5504 */
 237 static struct muic_irq sm5504_muic_irqs[] = {
 238         { SM5504_IRQ_INT1_ATTACH,       "muic-attach" },
 239         { SM5504_IRQ_INT1_DETACH,       "muic-detach" },
 240         { SM5504_IRQ_INT1_CHG_DET,      "muic-chg-det" },
 241         { SM5504_IRQ_INT1_DCD_OUT,      "muic-dcd-out" },
 242         { SM5504_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 243         { SM5504_IRQ_INT1_CONNECT,      "muic-connect" },
 244         { SM5504_IRQ_INT1_ADC_CHG,      "muic-adc-chg" },
 245         { SM5504_IRQ_INT2_RID_CHG,      "muic-rid-chg" },
 246         { SM5504_IRQ_INT2_UVLO,         "muic-uvlo" },
 247         { SM5504_IRQ_INT2_POR,          "muic-por" },
 248         { SM5504_IRQ_INT2_OVP_FET,      "muic-ovp-fet" },
 249         { SM5504_IRQ_INT2_OCP_LATCH,    "muic-ocp-latch" },
 250         { SM5504_IRQ_INT2_OCP_EVENT,    "muic-ocp-event" },
 251         { SM5504_IRQ_INT2_OVP_OCP_EVENT, "muic-ovp-ocp-event" },
 252 };
 253
 254 /* Define interrupt list of SM5504 to register regmap_irq */
 255 static const struct regmap_irq sm5504_irqs[] = {
 256         /* INT1 interrupts */
 257         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ATTACH_MASK, },
 258         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DETACH_MASK, },
 259         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CHG_DET_MASK, },
 260         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_DCD_OUT_MASK, },
 261         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_OVP_MASK, },
 262         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_CONNECT_MASK, },
 263         { .reg_offset = 0, .mask = SM5504_IRQ_INT1_ADC_CHG_MASK, },
 264
 265         /* INT2 interrupts */
 266         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_RID_CHG_MASK,},
 267         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_UVLO_MASK, },
 268         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_POR_MASK, },
 269         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_FET_MASK, },
 270         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_LATCH_MASK, },
 271         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OCP_EVENT_MASK, },
 272         { .reg_offset = 1, .mask = SM5504_IRQ_INT2_OVP_OCP_EVENT_MASK, },
 273 };
 274
 275 static const struct regmap_irq_chip sm5504_muic_irq_chip = {
 276         .name                   = "sm5504",
 277         .status_base            = SM5502_REG_INT1,
 278         .mask_base              = SM5502_REG_INTMASK1,
 279         .mask_invert            = false,
 280         .num_regs               = 2,
 281         .irqs                   = sm5504_irqs,
 282         .num_irqs               = ARRAY_SIZE(sm5504_irqs),
 283 };
 284
 285 /* Define regmap configuration of SM5502 for I2C communication  */
 286 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
 287 {
 288         switch (reg) {
 289         case SM5502_REG_INTMASK1:
 290         case SM5502_REG_INTMASK2:
 291                 return true;
 292         default:
 293                 break;
 294         }
 295         return false;
 296 }
 297
 298 static const struct regmap_config sm5502_muic_regmap_config = {
 299         .reg_bits       = 8,
 300         .val_bits       = 8,
 301         .volatile_reg   = sm5502_muic_volatile_reg,
 302         .max_register   = SM5502_REG_END,
 303 };
 304
 305 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
 306 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 307                                 unsigned int con_sw, unsigned int vbus_sw,
 308                                 bool attached)
 309 {
 310         int ret;
 311
 312         if (!attached) {
 313                 con_sw  = DM_DP_SWITCH_OPEN;
 314                 vbus_sw = VBUSIN_SWITCH_OPEN;
 315         }
 316
 317         switch (con_sw) {
 318         case DM_DP_SWITCH_OPEN:
 319         case DM_DP_SWITCH_USB:
 320         case DM_DP_SWITCH_AUDIO:
 321         case DM_DP_SWITCH_UART:
 322                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 323                                          SM5502_REG_MANUAL_SW1_DP_MASK |
 324                                          SM5502_REG_MANUAL_SW1_DM_MASK,
 325                                          con_sw);
 326                 if (ret < 0) {
 327                         dev_err(info->dev,
 328                                 "cannot update DM_CON/DP_CON switch\n");
 329                         return ret;
 330                 }
 331                 break;
 332         default:
 333                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
 334                                 con_sw);
 335                 return -EINVAL;
 336         }
 337
 338         switch (vbus_sw) {
 339         case VBUSIN_SWITCH_OPEN:
 340         case VBUSIN_SWITCH_VBUSOUT:
 341         case VBUSIN_SWITCH_MIC:
 342         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
 343                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 344                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
 345                                          vbus_sw);
 346                 if (ret < 0) {
 347                         dev_err(info->dev,
 348                                 "cannot update VBUSIN switch\n");
 349                         return ret;
 350                 }
 351                 break;
 352         default:
 353                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
 354                 return -EINVAL;
 355         }
 356
 357         return 0;
 358 }
 359
 360 /* Return cable type of attached or detached accessories */
 361 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 362 {
 363         unsigned int cable_type, adc, dev_type1;
 364         int ret;
 365
 366         /* Read ADC value according to external cable or button */
 367         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
 368         if (ret) {
 369                 dev_err(info->dev, "failed to read ADC register\n");
 370                 return ret;
 371         }
 372
 373         /*
 374          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
 375          * connected with to MUIC device.
 376          */
 377         cable_type = adc & SM5502_REG_ADC_MASK;
 378
 379         switch (cable_type) {
 380         case SM5502_MUIC_ADC_GROUND:
 381                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 382                                   &dev_type1);
 383                 if (ret) {
 384                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 385                         return ret;
 386                 }
 387
 388                 if (dev_type1 == info->type->otg_dev_type1) {
 389                         cable_type = SM5502_MUIC_ADC_GROUND_USB_OTG;
 390                 } else {
 391                         dev_dbg(info->dev,
 392                                 "cannot identify the cable type: adc(0x%x), dev_type1(0x%x)\n",
 393                                 adc, dev_type1);
 394                         return -EINVAL;
 395                 }
 396                 break;
 397         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 398         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 399         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 400         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 401         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 402         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 403         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 404         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 405         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 406         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 407         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 408         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 409         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 410         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 411         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 412         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 413         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 414         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 415         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 416         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 417         case SM5502_MUIC_ADC_TTY_CONVERTER:
 418         case SM5502_MUIC_ADC_UART_CABLE:
 419         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 420         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 421         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 422         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 423         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 424         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 425         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 426                 break;
 427         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 428                 /*
 429                  * Check whether cable type is
 430                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 431                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 432                  * by using Button event.
 433                  */
 434                 break;
 435         case SM5502_MUIC_ADC_OPEN:
 436                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 437                                   &dev_type1);
 438                 if (ret) {
 439                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 440                         return ret;
 441                 }
 442
 443                 if (dev_type1 == info->type->otg_dev_type1) {
 444                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 445                         break;
 446                 }
 447
 448                 switch (dev_type1) {
 449                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 450                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 451                         break;
 452                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 453                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 454                         break;
 455                 default:
 456                         dev_dbg(info->dev,
 457                                 "cannot identify the cable type: adc(0x%x)\n",
 458                                 adc);
 459                         return -EINVAL;
 460                 }
 461                 break;
 462         default:
 463                 dev_err(info->dev,
 464                         "failed to identify the cable type: adc(0x%x)\n", adc);
 465                 return -EINVAL;
 466         }
 467
 468         return cable_type;
 469 }
 470
 471 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 472                                      bool attached)
 473 {
 474         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 475         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 476         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 477         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 478         unsigned int id;
 479         int ret;
 480
 481         /* Get the type of attached or detached cable */
 482         if (attached)
 483                 cable_type = sm5502_muic_get_cable_type(info);
 484         else
 485                 cable_type = prev_cable_type;
 486         prev_cable_type = cable_type;
 487
 488         switch (cable_type) {
 489         case SM5502_MUIC_ADC_OPEN_USB:
 490                 id      = EXTCON_USB;
 491                 con_sw  = DM_DP_SWITCH_USB;
 492                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 493                 break;
 494         case SM5502_MUIC_ADC_OPEN_TA:
 495                 id      = EXTCON_CHG_USB_DCP;
 496                 con_sw  = DM_DP_SWITCH_OPEN;
 497                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 498                 break;
 499         case SM5502_MUIC_ADC_GROUND_USB_OTG:
 500         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 501                 id      = EXTCON_USB_HOST;
 502                 con_sw  = DM_DP_SWITCH_USB;
 503                 vbus_sw = VBUSIN_SWITCH_OPEN;
 504                 break;
 505         default:
 506                 dev_dbg(info->dev,
 507                         "cannot handle this cable_type (0x%x)\n", cable_type);
 508                 return 0;
 509         }
 510
 511         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 512         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 513         if (ret < 0)
 514                 return ret;
 515
 516         /* Change the state of external accessory */
 517         extcon_set_state_sync(info->edev, id, attached);
 518         if (id == EXTCON_USB)
 519                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 520                                         attached);
 521
 522         return 0;
 523 }
 524
 525 static void sm5502_muic_irq_work(struct work_struct *work)
 526 {
 527         struct sm5502_muic_info *info = container_of(work,
 528                         struct sm5502_muic_info, irq_work);
 529         int ret = 0;
 530
 531         if (!info->edev)
 532                 return;
 533
 534         mutex_lock(&info->mutex);
 535
 536         /* Detect attached or detached cables */
 537         if (info->irq_attach) {
 538                 ret = sm5502_muic_cable_handler(info, true);
 539                 info->irq_attach = false;
 540         }
 541         if (info->irq_detach) {
 542                 ret = sm5502_muic_cable_handler(info, false);
 543                 info->irq_detach = false;
 544         }
 545
 546         if (ret < 0)
 547                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 548
 549         mutex_unlock(&info->mutex);
 550 }
 551
 552 /*
 553  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 554  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 555  */
 556 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 557 {
 558         switch (irq_type) {
 559         case SM5502_IRQ_INT1_ATTACH:
 560                 info->irq_attach = true;
 561                 break;
 562         case SM5502_IRQ_INT1_DETACH:
 563                 info->irq_detach = true;
 564                 break;
 565         case SM5502_IRQ_INT1_KP:
 566         case SM5502_IRQ_INT1_LKP:
 567         case SM5502_IRQ_INT1_LKR:
 568         case SM5502_IRQ_INT1_OVP_EVENT:
 569         case SM5502_IRQ_INT1_OCP_EVENT:
 570         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 571         case SM5502_IRQ_INT2_VBUS_DET:
 572         case SM5502_IRQ_INT2_REV_ACCE:
 573         case SM5502_IRQ_INT2_ADC_CHG:
 574         case SM5502_IRQ_INT2_STUCK_KEY:
 575         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 576         case SM5502_IRQ_INT2_MHL:
 577         default:
 578                 break;
 579         }
 580
 581         return 0;
 582 }
 583
 584 static int sm5504_parse_irq(struct sm5502_muic_info *info, int irq_type)
 585 {
 586         switch (irq_type) {
 587         case SM5504_IRQ_INT1_ATTACH:
 588                 info->irq_attach = true;
 589                 break;
 590         case SM5504_IRQ_INT1_DETACH:
 591                 info->irq_detach = true;
 592                 break;
 593         case SM5504_IRQ_INT1_CHG_DET:
 594         case SM5504_IRQ_INT1_DCD_OUT:
 595         case SM5504_IRQ_INT1_OVP_EVENT:
 596         case SM5504_IRQ_INT1_CONNECT:
 597         case SM5504_IRQ_INT1_ADC_CHG:
 598         case SM5504_IRQ_INT2_RID_CHG:
 599         case SM5504_IRQ_INT2_UVLO:
 600         case SM5504_IRQ_INT2_POR:
 601         case SM5504_IRQ_INT2_OVP_FET:
 602         case SM5504_IRQ_INT2_OCP_LATCH:
 603         case SM5504_IRQ_INT2_OCP_EVENT:
 604         case SM5504_IRQ_INT2_OVP_OCP_EVENT:
 605         default:
 606                 break;
 607         }
 608
 609         return 0;
 610 }
 611
 612 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 613 {
 614         struct sm5502_muic_info *info = data;
 615         int i, irq_type = -1, ret;
 616
 617         for (i = 0; i < info->type->num_muic_irqs; i++)
 618                 if (irq == info->type->muic_irqs[i].virq)
 619                         irq_type = info->type->muic_irqs[i].irq;
 620
 621         ret = info->type->parse_irq(info, irq_type);
 622         if (ret < 0) {
 623                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 624                                     irq_type);
 625                 return IRQ_HANDLED;
 626         }
 627         schedule_work(&info->irq_work);
 628
 629         return IRQ_HANDLED;
 630 }
 631
 632 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 633 {
 634         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 635                                 struct sm5502_muic_info, wq_detcable);
 636         int ret;
 637
 638         /* Notify the state of connector cable or not  */
 639         ret = sm5502_muic_cable_handler(info, true);
 640         if (ret < 0)
 641                 dev_warn(info->dev, "failed to detect cable state\n");
 642 }
 643
 644 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 645 {
 646         unsigned int reg_data, vendor_id, version_id;
 647         int i, ret;
 648
 649         /* To test I2C, Print version_id and vendor_id of SM5502 */
 650         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 651         if (ret) {
 652                 dev_err(info->dev,
 653                         "failed to read DEVICE_ID register: %d\n", ret);
 654                 return;
 655         }
 656
 657         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 658                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 659         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 660                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 661
 662         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 663                             version_id, vendor_id);
 664
 665         /* Initiazle the register of SM5502 device to bring-up */
 666         for (i = 0; i < info->type->num_reg_data; i++) {
 667                 unsigned int val = 0;
 668
 669                 if (!info->type->reg_data[i].invert)
 670                         val |= ~info->type->reg_data[i].val;
 671                 else
 672                         val = info->type->reg_data[i].val;
 673                 regmap_write(info->regmap, info->type->reg_data[i].reg, val);
 674         }
 675 }
 676
 677 static int sm5022_muic_i2c_probe(struct i2c_client *i2c)
 678 {
 679         struct device_node *np = i2c->dev.of_node;
 680         struct sm5502_muic_info *info;
 681         int i, ret, irq_flags;
 682
 683         if (!np)
 684                 return -EINVAL;
 685
 686         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 687         if (!info)
 688                 return -ENOMEM;
 689         i2c_set_clientdata(i2c, info);
 690
 691         info->dev = &i2c->dev;
 692         info->i2c = i2c;
 693         info->irq = i2c->irq;
 694         info->type = device_get_match_data(info->dev);
 695         if (!info->type)
 696                 return -EINVAL;
 697         if (!info->type->parse_irq) {
 698                 dev_err(info->dev, "parse_irq missing in struct sm5502_type\n");
 699                 return -EINVAL;
 700         }
 701
 702         mutex_init(&info->mutex);
 703
 704         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 705
 706         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 707         if (IS_ERR(info->regmap)) {
 708                 ret = PTR_ERR(info->regmap);
 709                 dev_err(info->dev, "failed to allocate register map: %d\n",
 710                                    ret);
 711                 return ret;
 712         }
 713
 714         /* Support irq domain for SM5502 MUIC device */
 715         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 716         ret = devm_regmap_add_irq_chip(info->dev, info->regmap, info->irq,
 717                                        irq_flags, 0, info->type->irq_chip,
 718                                        &info->irq_data);
 719         if (ret != 0) {
 720                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 721                                     info->irq, ret);
 722                 return ret;
 723         }
 724
 725         for (i = 0; i < info->type->num_muic_irqs; i++) {
 726                 struct muic_irq *muic_irq = &info->type->muic_irqs[i];
 727                 int virq = 0;
 728
 729                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 730                 if (virq <= 0)
 731                         return -EINVAL;
 732                 muic_irq->virq = virq;
 733
 734                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 735                                                 sm5502_muic_irq_handler,
 736                                                 IRQF_NO_SUSPEND | IRQF_ONESHOT,
 737                                                 muic_irq->name, info);
 738                 if (ret) {
 739                         dev_err(info->dev,
 740                                 "failed: irq request (IRQ: %d, error :%d)\n",
 741                                 muic_irq->irq, ret);
 742                         return ret;
 743                 }
 744         }
 745
 746         /* Allocate extcon device */
 747         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 748         if (IS_ERR(info->edev)) {
 749                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 750                 return -ENOMEM;
 751         }
 752
 753         /* Register extcon device */
 754         ret = devm_extcon_dev_register(info->dev, info->edev);
 755         if (ret) {
 756                 dev_err(info->dev, "failed to register extcon device\n");
 757                 return ret;
 758         }
 759
 760         /*
 761          * Detect accessory after completing the initialization of platform
 762          *
 763          * - Use delayed workqueue to detect cable state and then
 764          * notify cable state to notifiee/platform through uevent.
 765          * After completing the booting of platform, the extcon provider
 766          * driver should notify cable state to upper layer.
 767          */
 768         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 769         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 770                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 771
 772         /* Initialize SM5502 device and print vendor id and version id */
 773         sm5502_init_dev_type(info);
 774
 775         return 0;
 776 }
 777
 778 static const struct sm5502_type sm5502_data = {
 779         .muic_irqs = sm5502_muic_irqs,
 780         .num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs),
 781         .irq_chip = &sm5502_muic_irq_chip,
 782         .reg_data = sm5502_reg_data,
 783         .num_reg_data = ARRAY_SIZE(sm5502_reg_data),
 784         .otg_dev_type1 = SM5502_REG_DEV_TYPE1_USB_OTG_MASK,
 785         .parse_irq = sm5502_parse_irq,
 786 };
 787
 788 static const struct sm5502_type sm5504_data = {
 789         .muic_irqs = sm5504_muic_irqs,
 790         .num_muic_irqs = ARRAY_SIZE(sm5504_muic_irqs),
 791         .irq_chip = &sm5504_muic_irq_chip,
 792         .reg_data = sm5504_reg_data,
 793         .num_reg_data = ARRAY_SIZE(sm5504_reg_data),
 794         .otg_dev_type1 = SM5504_REG_DEV_TYPE1_USB_OTG_MASK,
 795         .parse_irq = sm5504_parse_irq,
 796 };
 797
 798 static const struct of_device_id sm5502_dt_match[] = {
 799         { .compatible = "siliconmitus,sm5502-muic", .data = &sm5502_data },
 800         { .compatible = "siliconmitus,sm5504-muic", .data = &sm5504_data },
 801         { },
 802 };
 803 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 804
 805 #ifdef CONFIG_PM_SLEEP
 806 static int sm5502_muic_suspend(struct device *dev)
 807 {
 808         struct i2c_client *i2c = to_i2c_client(dev);
 809         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 810
 811         enable_irq_wake(info->irq);
 812
 813         return 0;
 814 }
 815
 816 static int sm5502_muic_resume(struct device *dev)
 817 {
 818         struct i2c_client *i2c = to_i2c_client(dev);
 819         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 820
 821         disable_irq_wake(info->irq);
 822
 823         return 0;
 824 }
 825 #endif
 826
 827 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 828                          sm5502_muic_suspend, sm5502_muic_resume);
 829
 830 static const struct i2c_device_id sm5502_i2c_id[] = {
 831         { "sm5502", (kernel_ulong_t)&sm5502_data },
 832         { "sm5504", (kernel_ulong_t)&sm5504_data },
 833         { }
 834 };
 835 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 836
 837 static struct i2c_driver sm5502_muic_i2c_driver = {
 838         .driver         = {
 839                 .name   = "sm5502",
 840                 .pm     = &sm5502_muic_pm_ops,
 841                 .of_match_table = sm5502_dt_match,
 842         },
 843         .probe_new = sm5022_muic_i2c_probe,
 844         .id_table = sm5502_i2c_id,
 845 };
 846
 847 static int __init sm5502_muic_i2c_init(void)
 848 {
 849         return i2c_add_driver(&sm5502_muic_i2c_driver);
 850 }
 851 subsys_initcall(sm5502_muic_i2c_init);
 852
 853 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 854 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 855 MODULE_LICENSE("GPL");