drivers/extcon/extcon-sm5502.c

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