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