drivers/extcon/extcon-sm5502.c

   1 /*
   2  * extcon-sm5502.c - Silicon Mitus SM5502 extcon drvier to support USB switches
   3  *
   4  * Copyright (c) 2014 Samsung Electronics Co., Ltd
   5  * Author: Chanwoo Choi <cw00.choi@samsung.com>
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/err.h>
  14 #include <linux/i2c.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/irqdomain.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/platform_device.h>
  20 #include <linux/regmap.h>
  21 #include <linux/slab.h>
  22 #include <linux/extcon.h>
  23
  24 #include "extcon-sm5502.h"
  25
  26 #define DELAY_MS_DEFAULT                17000   /* unit: millisecond */
  27
  28 struct muic_irq {
  29         unsigned int irq;
  30         const char *name;
  31         unsigned int virq;
  32 };
  33
  34 struct reg_data {
  35         u8 reg;
  36         unsigned int val;
  37         bool invert;
  38 };
  39
  40 struct sm5502_muic_info {
  41         struct device *dev;
  42         struct extcon_dev *edev;
  43
  44         struct i2c_client *i2c;
  45         struct regmap *regmap;
  46
  47         struct regmap_irq_chip_data *irq_data;
  48         struct muic_irq *muic_irqs;
  49         unsigned int num_muic_irqs;
  50         int irq;
  51         bool irq_attach;
  52         bool irq_detach;
  53         struct work_struct irq_work;
  54
  55         struct reg_data *reg_data;
  56         unsigned int num_reg_data;
  57
  58         struct mutex mutex;
  59
  60         /*
  61          * Use delayed workqueue to detect cable state and then
  62          * notify cable state to notifiee/platform through uevent.
  63          * After completing the booting of platform, the extcon provider
  64          * driver should notify cable state to upper layer.
  65          */
  66         struct delayed_work wq_detcable;
  67 };
  68
  69 /* Default value of SM5502 register to bring up MUIC device. */
  70 static struct reg_data sm5502_reg_data[] = {
  71         {
  72                 .reg = SM5502_REG_RESET,
  73                 .val = SM5502_REG_RESET_MASK,
  74                 .invert = true,
  75         }, {
  76                 .reg = SM5502_REG_CONTROL,
  77                 .val = SM5502_REG_CONTROL_MASK_INT_MASK,
  78                 .invert = false,
  79         }, {
  80                 .reg = SM5502_REG_INTMASK1,
  81                 .val = SM5502_REG_INTM1_KP_MASK
  82                         | SM5502_REG_INTM1_LKP_MASK
  83                         | SM5502_REG_INTM1_LKR_MASK,
  84                 .invert = true,
  85         }, {
  86                 .reg = SM5502_REG_INTMASK2,
  87                 .val = SM5502_REG_INTM2_VBUS_DET_MASK
  88                         | SM5502_REG_INTM2_REV_ACCE_MASK
  89                         | SM5502_REG_INTM2_ADC_CHG_MASK
  90                         | SM5502_REG_INTM2_STUCK_KEY_MASK
  91                         | SM5502_REG_INTM2_STUCK_KEY_RCV_MASK
  92                         | SM5502_REG_INTM2_MHL_MASK,
  93                 .invert = true,
  94         },
  95 };
  96
  97 /* List of detectable cables */
  98 static const unsigned int sm5502_extcon_cable[] = {
  99         EXTCON_USB,
 100         EXTCON_USB_HOST,
 101         EXTCON_CHG_USB_SDP,
 102         EXTCON_CHG_USB_DCP,
 103         EXTCON_NONE,
 104 };
 105
 106 /* Define supported accessory type */
 107 enum sm5502_muic_acc_type {
 108         SM5502_MUIC_ADC_GROUND = 0x0,
 109         SM5502_MUIC_ADC_SEND_END_BUTTON,
 110         SM5502_MUIC_ADC_REMOTE_S1_BUTTON,
 111         SM5502_MUIC_ADC_REMOTE_S2_BUTTON,
 112         SM5502_MUIC_ADC_REMOTE_S3_BUTTON,
 113         SM5502_MUIC_ADC_REMOTE_S4_BUTTON,
 114         SM5502_MUIC_ADC_REMOTE_S5_BUTTON,
 115         SM5502_MUIC_ADC_REMOTE_S6_BUTTON,
 116         SM5502_MUIC_ADC_REMOTE_S7_BUTTON,
 117         SM5502_MUIC_ADC_REMOTE_S8_BUTTON,
 118         SM5502_MUIC_ADC_REMOTE_S9_BUTTON,
 119         SM5502_MUIC_ADC_REMOTE_S10_BUTTON,
 120         SM5502_MUIC_ADC_REMOTE_S11_BUTTON,
 121         SM5502_MUIC_ADC_REMOTE_S12_BUTTON,
 122         SM5502_MUIC_ADC_RESERVED_ACC_1,
 123         SM5502_MUIC_ADC_RESERVED_ACC_2,
 124         SM5502_MUIC_ADC_RESERVED_ACC_3,
 125         SM5502_MUIC_ADC_RESERVED_ACC_4,
 126         SM5502_MUIC_ADC_RESERVED_ACC_5,
 127         SM5502_MUIC_ADC_AUDIO_TYPE2,
 128         SM5502_MUIC_ADC_PHONE_POWERED_DEV,
 129         SM5502_MUIC_ADC_TTY_CONVERTER,
 130         SM5502_MUIC_ADC_UART_CABLE,
 131         SM5502_MUIC_ADC_TYPE1_CHARGER,
 132         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB,
 133         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB,
 134         SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE,
 135         SM5502_MUIC_ADC_TYPE2_CHARGER,
 136         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART,
 137         SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART,
 138         SM5502_MUIC_ADC_AUDIO_TYPE1,
 139         SM5502_MUIC_ADC_OPEN = 0x1f,
 140
 141         /*
 142          * The below accessories have same ADC value (0x1f or 0x1e).
 143          * So, Device type1 is used to separate specific accessory.
 144          */
 145                                                         /* |---------|--ADC| */
 146                                                         /* |    [7:5]|[4:0]| */
 147         SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE = 0x3e, /* |      001|11110| */
 148         SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END = 0x5e,    /* |      010|11110| */
 149                                                         /* |Dev Type1|--ADC| */
 150         SM5502_MUIC_ADC_OPEN_USB = 0x5f,                /* |      010|11111| */
 151         SM5502_MUIC_ADC_OPEN_TA = 0xdf,                 /* |      110|11111| */
 152         SM5502_MUIC_ADC_OPEN_USB_OTG = 0xff,            /* |      111|11111| */
 153 };
 154
 155 /* List of supported interrupt for SM5502 */
 156 static struct muic_irq sm5502_muic_irqs[] = {
 157         { SM5502_IRQ_INT1_ATTACH,       "muic-attach" },
 158         { SM5502_IRQ_INT1_DETACH,       "muic-detach" },
 159         { SM5502_IRQ_INT1_KP,           "muic-kp" },
 160         { SM5502_IRQ_INT1_LKP,          "muic-lkp" },
 161         { SM5502_IRQ_INT1_LKR,          "muic-lkr" },
 162         { SM5502_IRQ_INT1_OVP_EVENT,    "muic-ovp-event" },
 163         { SM5502_IRQ_INT1_OCP_EVENT,    "muic-ocp-event" },
 164         { SM5502_IRQ_INT1_OVP_OCP_DIS,  "muic-ovp-ocp-dis" },
 165         { SM5502_IRQ_INT2_VBUS_DET,     "muic-vbus-det" },
 166         { SM5502_IRQ_INT2_REV_ACCE,     "muic-rev-acce" },
 167         { SM5502_IRQ_INT2_ADC_CHG,      "muic-adc-chg" },
 168         { SM5502_IRQ_INT2_STUCK_KEY,    "muic-stuck-key" },
 169         { SM5502_IRQ_INT2_STUCK_KEY_RCV, "muic-stuck-key-rcv" },
 170         { SM5502_IRQ_INT2_MHL,          "muic-mhl" },
 171 };
 172
 173 /* Define interrupt list of SM5502 to register regmap_irq */
 174 static const struct regmap_irq sm5502_irqs[] = {
 175         /* INT1 interrupts */
 176         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_ATTACH_MASK, },
 177         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_DETACH_MASK, },
 178         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_KP_MASK, },
 179         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKP_MASK, },
 180         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_LKR_MASK, },
 181         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_EVENT_MASK, },
 182         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OCP_EVENT_MASK, },
 183         { .reg_offset = 0, .mask = SM5502_IRQ_INT1_OVP_OCP_DIS_MASK, },
 184
 185         /* INT2 interrupts */
 186         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_VBUS_DET_MASK,},
 187         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_REV_ACCE_MASK, },
 188         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_ADC_CHG_MASK, },
 189         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_MASK, },
 190         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_STUCK_KEY_RCV_MASK, },
 191         { .reg_offset = 1, .mask = SM5502_IRQ_INT2_MHL_MASK, },
 192 };
 193
 194 static const struct regmap_irq_chip sm5502_muic_irq_chip = {
 195         .name                   = "sm5502",
 196         .status_base            = SM5502_REG_INT1,
 197         .mask_base              = SM5502_REG_INTMASK1,
 198         .mask_invert            = false,
 199         .num_regs               = 2,
 200         .irqs                   = sm5502_irqs,
 201         .num_irqs               = ARRAY_SIZE(sm5502_irqs),
 202 };
 203
 204 /* Define regmap configuration of SM5502 for I2C communication  */
 205 static bool sm5502_muic_volatile_reg(struct device *dev, unsigned int reg)
 206 {
 207         switch (reg) {
 208         case SM5502_REG_INTMASK1:
 209         case SM5502_REG_INTMASK2:
 210                 return true;
 211         default:
 212                 break;
 213         }
 214         return false;
 215 }
 216
 217 static const struct regmap_config sm5502_muic_regmap_config = {
 218         .reg_bits       = 8,
 219         .val_bits       = 8,
 220         .volatile_reg   = sm5502_muic_volatile_reg,
 221         .max_register   = SM5502_REG_END,
 222 };
 223
 224 /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */
 225 static int sm5502_muic_set_path(struct sm5502_muic_info *info,
 226                                 unsigned int con_sw, unsigned int vbus_sw,
 227                                 bool attached)
 228 {
 229         int ret;
 230
 231         if (!attached) {
 232                 con_sw  = DM_DP_SWITCH_OPEN;
 233                 vbus_sw = VBUSIN_SWITCH_OPEN;
 234         }
 235
 236         switch (con_sw) {
 237         case DM_DP_SWITCH_OPEN:
 238         case DM_DP_SWITCH_USB:
 239         case DM_DP_SWITCH_AUDIO:
 240         case DM_DP_SWITCH_UART:
 241                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 242                                          SM5502_REG_MANUAL_SW1_DP_MASK |
 243                                          SM5502_REG_MANUAL_SW1_DM_MASK,
 244                                          con_sw);
 245                 if (ret < 0) {
 246                         dev_err(info->dev,
 247                                 "cannot update DM_CON/DP_CON switch\n");
 248                         return ret;
 249                 }
 250                 break;
 251         default:
 252                 dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n",
 253                                 con_sw);
 254                 return -EINVAL;
 255         };
 256
 257         switch (vbus_sw) {
 258         case VBUSIN_SWITCH_OPEN:
 259         case VBUSIN_SWITCH_VBUSOUT:
 260         case VBUSIN_SWITCH_MIC:
 261         case VBUSIN_SWITCH_VBUSOUT_WITH_USB:
 262                 ret = regmap_update_bits(info->regmap, SM5502_REG_MANUAL_SW1,
 263                                          SM5502_REG_MANUAL_SW1_VBUSIN_MASK,
 264                                          vbus_sw);
 265                 if (ret < 0) {
 266                         dev_err(info->dev,
 267                                 "cannot update VBUSIN switch\n");
 268                         return ret;
 269                 }
 270                 break;
 271         default:
 272                 dev_err(info->dev, "Unknown VBUS switch type (%d)\n", vbus_sw);
 273                 return -EINVAL;
 274         };
 275
 276         return 0;
 277 }
 278
 279 /* Return cable type of attached or detached accessories */
 280 static unsigned int sm5502_muic_get_cable_type(struct sm5502_muic_info *info)
 281 {
 282         unsigned int cable_type = -1, adc, dev_type1;
 283         int ret;
 284
 285         /* Read ADC value according to external cable or button */
 286         ret = regmap_read(info->regmap, SM5502_REG_ADC, &adc);
 287         if (ret) {
 288                 dev_err(info->dev, "failed to read ADC register\n");
 289                 return ret;
 290         }
 291
 292         /*
 293          * If ADC is SM5502_MUIC_ADC_GROUND(0x0), external cable hasn't
 294          * connected with to MUIC device.
 295          */
 296         cable_type = adc & SM5502_REG_ADC_MASK;
 297         if (cable_type == SM5502_MUIC_ADC_GROUND)
 298                 return SM5502_MUIC_ADC_GROUND;
 299
 300         switch (cable_type) {
 301         case SM5502_MUIC_ADC_GROUND:
 302         case SM5502_MUIC_ADC_SEND_END_BUTTON:
 303         case SM5502_MUIC_ADC_REMOTE_S1_BUTTON:
 304         case SM5502_MUIC_ADC_REMOTE_S2_BUTTON:
 305         case SM5502_MUIC_ADC_REMOTE_S3_BUTTON:
 306         case SM5502_MUIC_ADC_REMOTE_S4_BUTTON:
 307         case SM5502_MUIC_ADC_REMOTE_S5_BUTTON:
 308         case SM5502_MUIC_ADC_REMOTE_S6_BUTTON:
 309         case SM5502_MUIC_ADC_REMOTE_S7_BUTTON:
 310         case SM5502_MUIC_ADC_REMOTE_S8_BUTTON:
 311         case SM5502_MUIC_ADC_REMOTE_S9_BUTTON:
 312         case SM5502_MUIC_ADC_REMOTE_S10_BUTTON:
 313         case SM5502_MUIC_ADC_REMOTE_S11_BUTTON:
 314         case SM5502_MUIC_ADC_REMOTE_S12_BUTTON:
 315         case SM5502_MUIC_ADC_RESERVED_ACC_1:
 316         case SM5502_MUIC_ADC_RESERVED_ACC_2:
 317         case SM5502_MUIC_ADC_RESERVED_ACC_3:
 318         case SM5502_MUIC_ADC_RESERVED_ACC_4:
 319         case SM5502_MUIC_ADC_RESERVED_ACC_5:
 320         case SM5502_MUIC_ADC_AUDIO_TYPE2:
 321         case SM5502_MUIC_ADC_PHONE_POWERED_DEV:
 322         case SM5502_MUIC_ADC_TTY_CONVERTER:
 323         case SM5502_MUIC_ADC_UART_CABLE:
 324         case SM5502_MUIC_ADC_TYPE1_CHARGER:
 325         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB:
 326         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB:
 327         case SM5502_MUIC_ADC_AUDIO_VIDEO_CABLE:
 328         case SM5502_MUIC_ADC_TYPE2_CHARGER:
 329         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART:
 330         case SM5502_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART:
 331                 break;
 332         case SM5502_MUIC_ADC_AUDIO_TYPE1:
 333                 /*
 334                  * Check whether cable type is
 335                  * SM5502_MUIC_ADC_AUDIO_TYPE1_FULL_REMOTE
 336                  * or SM5502_MUIC_ADC_AUDIO_TYPE1_SEND_END
 337                  * by using Button event.
 338                  */
 339                 break;
 340         case SM5502_MUIC_ADC_OPEN:
 341                 ret = regmap_read(info->regmap, SM5502_REG_DEV_TYPE1,
 342                                   &dev_type1);
 343                 if (ret) {
 344                         dev_err(info->dev, "failed to read DEV_TYPE1 reg\n");
 345                         return ret;
 346                 }
 347
 348                 switch (dev_type1) {
 349                 case SM5502_REG_DEV_TYPE1_USB_SDP_MASK:
 350                         cable_type = SM5502_MUIC_ADC_OPEN_USB;
 351                         break;
 352                 case SM5502_REG_DEV_TYPE1_DEDICATED_CHG_MASK:
 353                         cable_type = SM5502_MUIC_ADC_OPEN_TA;
 354                         break;
 355                 case SM5502_REG_DEV_TYPE1_USB_OTG_MASK:
 356                         cable_type = SM5502_MUIC_ADC_OPEN_USB_OTG;
 357                         break;
 358                 default:
 359                         dev_dbg(info->dev,
 360                                 "cannot identify the cable type: adc(0x%x)\n",
 361                                 adc);
 362                         return -EINVAL;
 363                 };
 364                 break;
 365         default:
 366                 dev_err(info->dev,
 367                         "failed to identify the cable type: adc(0x%x)\n", adc);
 368                 return -EINVAL;
 369         };
 370
 371         return cable_type;
 372 }
 373
 374 static int sm5502_muic_cable_handler(struct sm5502_muic_info *info,
 375                                      bool attached)
 376 {
 377         static unsigned int prev_cable_type = SM5502_MUIC_ADC_GROUND;
 378         unsigned int cable_type = SM5502_MUIC_ADC_GROUND;
 379         unsigned int con_sw = DM_DP_SWITCH_OPEN;
 380         unsigned int vbus_sw = VBUSIN_SWITCH_OPEN;
 381         unsigned int id;
 382         int ret;
 383
 384         /* Get the type of attached or detached cable */
 385         if (attached)
 386                 cable_type = sm5502_muic_get_cable_type(info);
 387         else
 388                 cable_type = prev_cable_type;
 389         prev_cable_type = cable_type;
 390
 391         switch (cable_type) {
 392         case SM5502_MUIC_ADC_OPEN_USB:
 393                 id      = EXTCON_USB;
 394                 con_sw  = DM_DP_SWITCH_USB;
 395                 vbus_sw = VBUSIN_SWITCH_VBUSOUT_WITH_USB;
 396                 break;
 397         case SM5502_MUIC_ADC_OPEN_TA:
 398                 id      = EXTCON_CHG_USB_DCP;
 399                 con_sw  = DM_DP_SWITCH_OPEN;
 400                 vbus_sw = VBUSIN_SWITCH_VBUSOUT;
 401                 break;
 402         case SM5502_MUIC_ADC_OPEN_USB_OTG:
 403                 id      = EXTCON_USB_HOST;
 404                 con_sw  = DM_DP_SWITCH_USB;
 405                 vbus_sw = VBUSIN_SWITCH_OPEN;
 406                 break;
 407         default:
 408                 dev_dbg(info->dev,
 409                         "cannot handle this cable_type (0x%x)\n", cable_type);
 410                 return 0;
 411         };
 412
 413         /* Change internal hardware path(DM_CON/DP_CON, VBUSIN) */
 414         ret = sm5502_muic_set_path(info, con_sw, vbus_sw, attached);
 415         if (ret < 0)
 416                 return ret;
 417
 418         /* Change the state of external accessory */
 419         extcon_set_state_sync(info->edev, id, attached);
 420         if (id == EXTCON_USB)
 421                 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 422                                         attached);
 423
 424         return 0;
 425 }
 426
 427 static void sm5502_muic_irq_work(struct work_struct *work)
 428 {
 429         struct sm5502_muic_info *info = container_of(work,
 430                         struct sm5502_muic_info, irq_work);
 431         int ret = 0;
 432
 433         if (!info->edev)
 434                 return;
 435
 436         mutex_lock(&info->mutex);
 437
 438         /* Detect attached or detached cables */
 439         if (info->irq_attach) {
 440                 ret = sm5502_muic_cable_handler(info, true);
 441                 info->irq_attach = false;
 442         }
 443         if (info->irq_detach) {
 444                 ret = sm5502_muic_cable_handler(info, false);
 445                 info->irq_detach = false;
 446         }
 447
 448         if (ret < 0)
 449                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 450
 451         mutex_unlock(&info->mutex);
 452 }
 453
 454 /*
 455  * Sets irq_attach or irq_detach in sm5502_muic_info and returns 0.
 456  * Returns -ESRCH if irq_type does not match registered IRQ for this dev type.
 457  */
 458 static int sm5502_parse_irq(struct sm5502_muic_info *info, int irq_type)
 459 {
 460         switch (irq_type) {
 461         case SM5502_IRQ_INT1_ATTACH:
 462                 info->irq_attach = true;
 463                 break;
 464         case SM5502_IRQ_INT1_DETACH:
 465                 info->irq_detach = true;
 466                 break;
 467         case SM5502_IRQ_INT1_KP:
 468         case SM5502_IRQ_INT1_LKP:
 469         case SM5502_IRQ_INT1_LKR:
 470         case SM5502_IRQ_INT1_OVP_EVENT:
 471         case SM5502_IRQ_INT1_OCP_EVENT:
 472         case SM5502_IRQ_INT1_OVP_OCP_DIS:
 473         case SM5502_IRQ_INT2_VBUS_DET:
 474         case SM5502_IRQ_INT2_REV_ACCE:
 475         case SM5502_IRQ_INT2_ADC_CHG:
 476         case SM5502_IRQ_INT2_STUCK_KEY:
 477         case SM5502_IRQ_INT2_STUCK_KEY_RCV:
 478         case SM5502_IRQ_INT2_MHL:
 479         default:
 480                 break;
 481         }
 482
 483         return 0;
 484 }
 485
 486 static irqreturn_t sm5502_muic_irq_handler(int irq, void *data)
 487 {
 488         struct sm5502_muic_info *info = data;
 489         int i, irq_type = -1, ret;
 490
 491         for (i = 0; i < info->num_muic_irqs; i++)
 492                 if (irq == info->muic_irqs[i].virq)
 493                         irq_type = info->muic_irqs[i].irq;
 494
 495         ret = sm5502_parse_irq(info, irq_type);
 496         if (ret < 0) {
 497                 dev_warn(info->dev, "cannot handle is interrupt:%d\n",
 498                                     irq_type);
 499                 return IRQ_HANDLED;
 500         }
 501         schedule_work(&info->irq_work);
 502
 503         return IRQ_HANDLED;
 504 }
 505
 506 static void sm5502_muic_detect_cable_wq(struct work_struct *work)
 507 {
 508         struct sm5502_muic_info *info = container_of(to_delayed_work(work),
 509                                 struct sm5502_muic_info, wq_detcable);
 510         int ret;
 511
 512         /* Notify the state of connector cable or not  */
 513         ret = sm5502_muic_cable_handler(info, true);
 514         if (ret < 0)
 515                 dev_warn(info->dev, "failed to detect cable state\n");
 516 }
 517
 518 static void sm5502_init_dev_type(struct sm5502_muic_info *info)
 519 {
 520         unsigned int reg_data, vendor_id, version_id;
 521         int i, ret;
 522
 523         /* To test I2C, Print version_id and vendor_id of SM5502 */
 524         ret = regmap_read(info->regmap, SM5502_REG_DEVICE_ID, &reg_data);
 525         if (ret) {
 526                 dev_err(info->dev,
 527                         "failed to read DEVICE_ID register: %d\n", ret);
 528                 return;
 529         }
 530
 531         vendor_id = ((reg_data & SM5502_REG_DEVICE_ID_VENDOR_MASK) >>
 532                                 SM5502_REG_DEVICE_ID_VENDOR_SHIFT);
 533         version_id = ((reg_data & SM5502_REG_DEVICE_ID_VERSION_MASK) >>
 534                                 SM5502_REG_DEVICE_ID_VERSION_SHIFT);
 535
 536         dev_info(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
 537                             version_id, vendor_id);
 538
 539         /* Initiazle the register of SM5502 device to bring-up */
 540         for (i = 0; i < info->num_reg_data; i++) {
 541                 unsigned int val = 0;
 542
 543                 if (!info->reg_data[i].invert)
 544                         val |= ~info->reg_data[i].val;
 545                 else
 546                         val = info->reg_data[i].val;
 547                 regmap_write(info->regmap, info->reg_data[i].reg, val);
 548         }
 549 }
 550
 551 static int sm5022_muic_i2c_probe(struct i2c_client *i2c,
 552                                  const struct i2c_device_id *id)
 553 {
 554         struct device_node *np = i2c->dev.of_node;
 555         struct sm5502_muic_info *info;
 556         int i, ret, irq_flags;
 557
 558         if (!np)
 559                 return -EINVAL;
 560
 561         info = devm_kzalloc(&i2c->dev, sizeof(*info), GFP_KERNEL);
 562         if (!info)
 563                 return -ENOMEM;
 564         i2c_set_clientdata(i2c, info);
 565
 566         info->dev = &i2c->dev;
 567         info->i2c = i2c;
 568         info->irq = i2c->irq;
 569         info->muic_irqs = sm5502_muic_irqs;
 570         info->num_muic_irqs = ARRAY_SIZE(sm5502_muic_irqs);
 571         info->reg_data = sm5502_reg_data;
 572         info->num_reg_data = ARRAY_SIZE(sm5502_reg_data);
 573
 574         mutex_init(&info->mutex);
 575
 576         INIT_WORK(&info->irq_work, sm5502_muic_irq_work);
 577
 578         info->regmap = devm_regmap_init_i2c(i2c, &sm5502_muic_regmap_config);
 579         if (IS_ERR(info->regmap)) {
 580                 ret = PTR_ERR(info->regmap);
 581                 dev_err(info->dev, "failed to allocate register map: %d\n",
 582                                    ret);
 583                 return ret;
 584         }
 585
 586         /* Support irq domain for SM5502 MUIC device */
 587         irq_flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT | IRQF_SHARED;
 588         ret = regmap_add_irq_chip(info->regmap, info->irq, irq_flags, 0,
 589                                   &sm5502_muic_irq_chip, &info->irq_data);
 590         if (ret != 0) {
 591                 dev_err(info->dev, "failed to request IRQ %d: %d\n",
 592                                     info->irq, ret);
 593                 return ret;
 594         }
 595
 596         for (i = 0; i < info->num_muic_irqs; i++) {
 597                 struct muic_irq *muic_irq = &info->muic_irqs[i];
 598                 int virq = 0;
 599
 600                 virq = regmap_irq_get_virq(info->irq_data, muic_irq->irq);
 601                 if (virq <= 0)
 602                         return -EINVAL;
 603                 muic_irq->virq = virq;
 604
 605                 ret = devm_request_threaded_irq(info->dev, virq, NULL,
 606                                                 sm5502_muic_irq_handler,
 607                                                 IRQF_NO_SUSPEND,
 608                                                 muic_irq->name, info);
 609                 if (ret) {
 610                         dev_err(info->dev,
 611                                 "failed: irq request (IRQ: %d, error :%d)\n",
 612                                 muic_irq->irq, ret);
 613                         return ret;
 614                 }
 615         }
 616
 617         /* Allocate extcon device */
 618         info->edev = devm_extcon_dev_allocate(info->dev, sm5502_extcon_cable);
 619         if (IS_ERR(info->edev)) {
 620                 dev_err(info->dev, "failed to allocate memory for extcon\n");
 621                 return -ENOMEM;
 622         }
 623
 624         /* Register extcon device */
 625         ret = devm_extcon_dev_register(info->dev, info->edev);
 626         if (ret) {
 627                 dev_err(info->dev, "failed to register extcon device\n");
 628                 return ret;
 629         }
 630
 631         /*
 632          * Detect accessory after completing the initialization of platform
 633          *
 634          * - Use delayed workqueue to detect cable state and then
 635          * notify cable state to notifiee/platform through uevent.
 636          * After completing the booting of platform, the extcon provider
 637          * driver should notify cable state to upper layer.
 638          */
 639         INIT_DELAYED_WORK(&info->wq_detcable, sm5502_muic_detect_cable_wq);
 640         queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
 641                         msecs_to_jiffies(DELAY_MS_DEFAULT));
 642
 643         /* Initialize SM5502 device and print vendor id and version id */
 644         sm5502_init_dev_type(info);
 645
 646         return 0;
 647 }
 648
 649 static int sm5502_muic_i2c_remove(struct i2c_client *i2c)
 650 {
 651         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 652
 653         regmap_del_irq_chip(info->irq, info->irq_data);
 654
 655         return 0;
 656 }
 657
 658 static const struct of_device_id sm5502_dt_match[] = {
 659         { .compatible = "siliconmitus,sm5502-muic" },
 660         { },
 661 };
 662 MODULE_DEVICE_TABLE(of, sm5502_dt_match);
 663
 664 #ifdef CONFIG_PM_SLEEP
 665 static int sm5502_muic_suspend(struct device *dev)
 666 {
 667         struct i2c_client *i2c = to_i2c_client(dev);
 668         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 669
 670         enable_irq_wake(info->irq);
 671
 672         return 0;
 673 }
 674
 675 static int sm5502_muic_resume(struct device *dev)
 676 {
 677         struct i2c_client *i2c = to_i2c_client(dev);
 678         struct sm5502_muic_info *info = i2c_get_clientdata(i2c);
 679
 680         disable_irq_wake(info->irq);
 681
 682         return 0;
 683 }
 684 #endif
 685
 686 static SIMPLE_DEV_PM_OPS(sm5502_muic_pm_ops,
 687                          sm5502_muic_suspend, sm5502_muic_resume);
 688
 689 static const struct i2c_device_id sm5502_i2c_id[] = {
 690         { "sm5502", TYPE_SM5502 },
 691         { }
 692 };
 693 MODULE_DEVICE_TABLE(i2c, sm5502_i2c_id);
 694
 695 static struct i2c_driver sm5502_muic_i2c_driver = {
 696         .driver         = {
 697                 .name   = "sm5502",
 698                 .pm     = &sm5502_muic_pm_ops,
 699                 .of_match_table = sm5502_dt_match,
 700         },
 701         .probe  = sm5022_muic_i2c_probe,
 702         .remove = sm5502_muic_i2c_remove,
 703         .id_table = sm5502_i2c_id,
 704 };
 705
 706 static int __init sm5502_muic_i2c_init(void)
 707 {
 708         return i2c_add_driver(&sm5502_muic_i2c_driver);
 709 }
 710 subsys_initcall(sm5502_muic_i2c_init);
 711
 712 MODULE_DESCRIPTION("Silicon Mitus SM5502 Extcon driver");
 713 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 714 MODULE_LICENSE("GPL");