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