linux/drivers/extcon/extcon-max77693.c
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   1/*
   2 * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
   3 *
   4 * Copyright (C) 2012 Samsung Electrnoics
   5 * Chanwoo Choi <cw00.choi@samsung.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 */
  17
  18#include <linux/kernel.h>
  19#include <linux/module.h>
  20#include <linux/i2c.h>
  21#include <linux/slab.h>
  22#include <linux/input.h>
  23#include <linux/interrupt.h>
  24#include <linux/err.h>
  25#include <linux/platform_device.h>
  26#include <linux/mfd/max77693.h>
  27#include <linux/mfd/max77693-common.h>
  28#include <linux/mfd/max77693-private.h>
  29#include <linux/extcon-provider.h>
  30#include <linux/regmap.h>
  31#include <linux/irqdomain.h>
  32
  33#define DEV_NAME                        "max77693-muic"
  34#define DELAY_MS_DEFAULT                20000           /* unit: millisecond */
  35
  36/*
  37 * Default value of MAX77693 register to bring up MUIC device.
  38 * If user don't set some initial value for MUIC device through platform data,
  39 * extcon-max77693 driver use 'default_init_data' to bring up base operation
  40 * of MAX77693 MUIC device.
  41 */
  42static struct max77693_reg_data default_init_data[] = {
  43        {
  44                /* STATUS2 - [3]ChgDetRun */
  45                .addr = MAX77693_MUIC_REG_STATUS2,
  46                .data = MAX77693_STATUS2_CHGDETRUN_MASK,
  47        }, {
  48                /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
  49                .addr = MAX77693_MUIC_REG_INTMASK1,
  50                .data = INTMASK1_ADC1K_MASK
  51                        | INTMASK1_ADC_MASK,
  52        }, {
  53                /* INTMASK2 - Unmask [0]ChgTypM */
  54                .addr = MAX77693_MUIC_REG_INTMASK2,
  55                .data = INTMASK2_CHGTYP_MASK,
  56        }, {
  57                /* INTMASK3 - Mask all of interrupts */
  58                .addr = MAX77693_MUIC_REG_INTMASK3,
  59                .data = 0x0,
  60        }, {
  61                /* CDETCTRL2 */
  62                .addr = MAX77693_MUIC_REG_CDETCTRL2,
  63                .data = CDETCTRL2_VIDRMEN_MASK
  64                        | CDETCTRL2_DXOVPEN_MASK,
  65        },
  66};
  67
  68enum max77693_muic_adc_debounce_time {
  69        ADC_DEBOUNCE_TIME_5MS = 0,
  70        ADC_DEBOUNCE_TIME_10MS,
  71        ADC_DEBOUNCE_TIME_25MS,
  72        ADC_DEBOUNCE_TIME_38_62MS,
  73};
  74
  75struct max77693_muic_info {
  76        struct device *dev;
  77        struct max77693_dev *max77693;
  78        struct extcon_dev *edev;
  79        int prev_cable_type;
  80        int prev_cable_type_gnd;
  81        int prev_chg_type;
  82        int prev_button_type;
  83        u8 status[2];
  84
  85        int irq;
  86        struct work_struct irq_work;
  87        struct mutex mutex;
  88
  89        /*
  90         * Use delayed workqueue to detect cable state and then
  91         * notify cable state to notifiee/platform through uevent.
  92         * After completing the booting of platform, the extcon provider
  93         * driver should notify cable state to upper layer.
  94         */
  95        struct delayed_work wq_detcable;
  96
  97        /* Button of dock device */
  98        struct input_dev *dock;
  99
 100        /*
 101         * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
 102         * h/w path of COMP2/COMN1 on CONTROL1 register.
 103         */
 104        int path_usb;
 105        int path_uart;
 106};
 107
 108enum max77693_muic_cable_group {
 109        MAX77693_CABLE_GROUP_ADC = 0,
 110        MAX77693_CABLE_GROUP_ADC_GND,
 111        MAX77693_CABLE_GROUP_CHG,
 112        MAX77693_CABLE_GROUP_VBVOLT,
 113};
 114
 115enum max77693_muic_charger_type {
 116        MAX77693_CHARGER_TYPE_NONE = 0,
 117        MAX77693_CHARGER_TYPE_USB,
 118        MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 119        MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 120        MAX77693_CHARGER_TYPE_APPLE_500MA,
 121        MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 122        MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 123};
 124
 125/**
 126 * struct max77693_muic_irq
 127 * @irq: the index of irq list of MUIC device.
 128 * @name: the name of irq.
 129 * @virq: the virtual irq to use irq domain
 130 */
 131struct max77693_muic_irq {
 132        unsigned int irq;
 133        const char *name;
 134        unsigned int virq;
 135};
 136
 137static struct max77693_muic_irq muic_irqs[] = {
 138        { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 139        { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 140        { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 141        { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 142        { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 143        { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 144        { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 145        { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 146        { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 147        { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 148        { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 149        { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 150        { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 151        { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 152        { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 153        { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 154};
 155
 156/* Define supported accessory type */
 157enum max77693_muic_acc_type {
 158        MAX77693_MUIC_ADC_GROUND = 0x0,
 159        MAX77693_MUIC_ADC_SEND_END_BUTTON,
 160        MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 161        MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 162        MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 163        MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 164        MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 165        MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 166        MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 167        MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 168        MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 169        MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 170        MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 171        MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 172        MAX77693_MUIC_ADC_RESERVED_ACC_1,
 173        MAX77693_MUIC_ADC_RESERVED_ACC_2,
 174        MAX77693_MUIC_ADC_RESERVED_ACC_3,
 175        MAX77693_MUIC_ADC_RESERVED_ACC_4,
 176        MAX77693_MUIC_ADC_RESERVED_ACC_5,
 177        MAX77693_MUIC_ADC_CEA936_AUDIO,
 178        MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 179        MAX77693_MUIC_ADC_TTY_CONVERTER,
 180        MAX77693_MUIC_ADC_UART_CABLE,
 181        MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 182        MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 183        MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 184        MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 185        MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 186        MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 187        MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 188        MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 189        MAX77693_MUIC_ADC_OPEN,
 190
 191        /*
 192         * The below accessories have same ADC value so ADCLow and
 193         * ADC1K bit is used to separate specific accessory.
 194         */
 195                                                /* ADC|VBVolot|ADCLow|ADC1K| */
 196        MAX77693_MUIC_GND_USB_HOST = 0x100,     /* 0x0|      0|     0|    0| */
 197        MAX77693_MUIC_GND_USB_HOST_VB = 0x104,  /* 0x0|      1|     0|    0| */
 198        MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0|      0|     1|    0| */
 199        MAX77693_MUIC_GND_MHL = 0x103,          /* 0x0|      0|     1|    1| */
 200        MAX77693_MUIC_GND_MHL_VB = 0x107,       /* 0x0|      1|     1|    1| */
 201};
 202
 203/*
 204 * MAX77693 MUIC device support below list of accessories(external connector)
 205 */
 206static const unsigned int max77693_extcon_cable[] = {
 207        EXTCON_USB,
 208        EXTCON_USB_HOST,
 209        EXTCON_CHG_USB_SDP,
 210        EXTCON_CHG_USB_DCP,
 211        EXTCON_CHG_USB_FAST,
 212        EXTCON_CHG_USB_SLOW,
 213        EXTCON_CHG_USB_CDP,
 214        EXTCON_DISP_MHL,
 215        EXTCON_JIG,
 216        EXTCON_DOCK,
 217        EXTCON_NONE,
 218};
 219
 220/*
 221 * max77693_muic_set_debounce_time - Set the debounce time of ADC
 222 * @info: the instance including private data of max77693 MUIC
 223 * @time: the debounce time of ADC
 224 */
 225static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 226                enum max77693_muic_adc_debounce_time time)
 227{
 228        int ret;
 229
 230        switch (time) {
 231        case ADC_DEBOUNCE_TIME_5MS:
 232        case ADC_DEBOUNCE_TIME_10MS:
 233        case ADC_DEBOUNCE_TIME_25MS:
 234        case ADC_DEBOUNCE_TIME_38_62MS:
 235                /*
 236                 * Don't touch BTLDset, JIGset when you want to change adc
 237                 * debounce time. If it writes other than 0 to BTLDset, JIGset
 238                 * muic device will be reset and loose current state.
 239                 */
 240                ret = regmap_write(info->max77693->regmap_muic,
 241                                  MAX77693_MUIC_REG_CTRL3,
 242                                  time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
 243                if (ret) {
 244                        dev_err(info->dev, "failed to set ADC debounce time\n");
 245                        return ret;
 246                }
 247                break;
 248        default:
 249                dev_err(info->dev, "invalid ADC debounce time\n");
 250                return -EINVAL;
 251        }
 252
 253        return 0;
 254};
 255
 256/*
 257 * max77693_muic_set_path - Set hardware line according to attached cable
 258 * @info: the instance including private data of max77693 MUIC
 259 * @value: the path according to attached cable
 260 * @attached: the state of cable (true:attached, false:detached)
 261 *
 262 * The max77693 MUIC device share outside H/W line among a varity of cables
 263 * so, this function set internal path of H/W line according to the type of
 264 * attached cable.
 265 */
 266static int max77693_muic_set_path(struct max77693_muic_info *info,
 267                u8 val, bool attached)
 268{
 269        int ret;
 270        unsigned int ctrl1, ctrl2 = 0;
 271
 272        if (attached)
 273                ctrl1 = val;
 274        else
 275                ctrl1 = MAX77693_CONTROL1_SW_OPEN;
 276
 277        ret = regmap_update_bits(info->max77693->regmap_muic,
 278                        MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
 279        if (ret < 0) {
 280                dev_err(info->dev, "failed to update MUIC register\n");
 281                return ret;
 282        }
 283
 284        if (attached)
 285                ctrl2 |= MAX77693_CONTROL2_CPEN_MASK;   /* LowPwr=0, CPEn=1 */
 286        else
 287                ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
 288
 289        ret = regmap_update_bits(info->max77693->regmap_muic,
 290                        MAX77693_MUIC_REG_CTRL2,
 291                        MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
 292                        ctrl2);
 293        if (ret < 0) {
 294                dev_err(info->dev, "failed to update MUIC register\n");
 295                return ret;
 296        }
 297
 298        dev_info(info->dev,
 299                "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 300                ctrl1, ctrl2, attached ? "attached" : "detached");
 301
 302        return 0;
 303}
 304
 305/*
 306 * max77693_muic_get_cable_type - Return cable type and check cable state
 307 * @info: the instance including private data of max77693 MUIC
 308 * @group: the path according to attached cable
 309 * @attached: store cable state and return
 310 *
 311 * This function check the cable state either attached or detached,
 312 * and then divide precise type of cable according to cable group.
 313 *      - MAX77693_CABLE_GROUP_ADC
 314 *      - MAX77693_CABLE_GROUP_ADC_GND
 315 *      - MAX77693_CABLE_GROUP_CHG
 316 *      - MAX77693_CABLE_GROUP_VBVOLT
 317 */
 318static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
 319                enum max77693_muic_cable_group group, bool *attached)
 320{
 321        int cable_type = 0;
 322        int adc;
 323        int adc1k;
 324        int adclow;
 325        int vbvolt;
 326        int chg_type;
 327
 328        switch (group) {
 329        case MAX77693_CABLE_GROUP_ADC:
 330                /*
 331                 * Read ADC value to check cable type and decide cable state
 332                 * according to cable type
 333                 */
 334                adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 335                adc >>= MAX77693_STATUS1_ADC_SHIFT;
 336
 337                /*
 338                 * Check current cable state/cable type and store cable type
 339                 * (info->prev_cable_type) for handling cable when cable is
 340                 * detached.
 341                 */
 342                if (adc == MAX77693_MUIC_ADC_OPEN) {
 343                        *attached = false;
 344
 345                        cable_type = info->prev_cable_type;
 346                        info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
 347                } else {
 348                        *attached = true;
 349
 350                        cable_type = info->prev_cable_type = adc;
 351                }
 352                break;
 353        case MAX77693_CABLE_GROUP_ADC_GND:
 354                /*
 355                 * Read ADC value to check cable type and decide cable state
 356                 * according to cable type
 357                 */
 358                adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 359                adc >>= MAX77693_STATUS1_ADC_SHIFT;
 360
 361                /*
 362                 * Check current cable state/cable type and store cable type
 363                 * (info->prev_cable_type/_gnd) for handling cable when cable
 364                 * is detached.
 365                 */
 366                if (adc == MAX77693_MUIC_ADC_OPEN) {
 367                        *attached = false;
 368
 369                        cable_type = info->prev_cable_type_gnd;
 370                        info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
 371                } else {
 372                        *attached = true;
 373
 374                        adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
 375                        adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
 376                        adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
 377                        adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
 378
 379                        vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 380                        vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 381
 382                        /**
 383                         * [0x1|VBVolt|ADCLow|ADC1K]
 384                         * [0x1|     0|     0|    0] USB_HOST
 385                         * [0x1|     1|     0|    0] USB_HSOT_VB
 386                         * [0x1|     0|     1|    0] Audio Video cable with load
 387                         * [0x1|     0|     1|    1] MHL without charging cable
 388                         * [0x1|     1|     1|    1] MHL with charging cable
 389                         */
 390                        cable_type = ((0x1 << 8)
 391                                        | (vbvolt << 2)
 392                                        | (adclow << 1)
 393                                        | adc1k);
 394
 395                        info->prev_cable_type = adc;
 396                        info->prev_cable_type_gnd = cable_type;
 397                }
 398
 399                break;
 400        case MAX77693_CABLE_GROUP_CHG:
 401                /*
 402                 * Read charger type to check cable type and decide cable state
 403                 * according to type of charger cable.
 404                 */
 405                chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 406                chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 407
 408                if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
 409                        *attached = false;
 410
 411                        cable_type = info->prev_chg_type;
 412                        info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
 413                } else {
 414                        *attached = true;
 415
 416                        /*
 417                         * Check current cable state/cable type and store cable
 418                         * type(info->prev_chg_type) for handling cable when
 419                         * charger cable is detached.
 420                         */
 421                        cable_type = info->prev_chg_type = chg_type;
 422                }
 423
 424                break;
 425        case MAX77693_CABLE_GROUP_VBVOLT:
 426                /*
 427                 * Read ADC value to check cable type and decide cable state
 428                 * according to cable type
 429                 */
 430                adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
 431                adc >>= MAX77693_STATUS1_ADC_SHIFT;
 432                chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
 433                chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
 434
 435                if (adc == MAX77693_MUIC_ADC_OPEN
 436                                && chg_type == MAX77693_CHARGER_TYPE_NONE)
 437                        *attached = false;
 438                else
 439                        *attached = true;
 440
 441                /*
 442                 * Read vbvolt field, if vbvolt is 1,
 443                 * this cable is used for charging.
 444                 */
 445                vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
 446                vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
 447
 448                cable_type = vbvolt;
 449                break;
 450        default:
 451                dev_err(info->dev, "Unknown cable group (%d)\n", group);
 452                cable_type = -EINVAL;
 453                break;
 454        }
 455
 456        return cable_type;
 457}
 458
 459static int max77693_muic_dock_handler(struct max77693_muic_info *info,
 460                int cable_type, bool attached)
 461{
 462        int ret = 0;
 463        int vbvolt;
 464        bool cable_attached;
 465        unsigned int dock_id;
 466
 467        dev_info(info->dev,
 468                "external connector is %s (adc:0x%02x)\n",
 469                attached ? "attached" : "detached", cable_type);
 470
 471        switch (cable_type) {
 472        case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 473                /*
 474                 * Check power cable whether attached or detached state.
 475                 * The Dock-Smart device need surely external power supply.
 476                 * If power cable(USB/TA) isn't connected to Dock device,
 477                 * user can't use Dock-Smart for desktop mode.
 478                 */
 479                vbvolt = max77693_muic_get_cable_type(info,
 480                                MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
 481                if (attached && !vbvolt) {
 482                        dev_warn(info->dev,
 483                                "Cannot detect external power supply\n");
 484                        return 0;
 485                }
 486
 487                /*
 488                 * Notify Dock/MHL state.
 489                 * - Dock device include three type of cable which
 490                 * are HDMI, USB for mouse/keyboard and micro-usb port
 491                 * for USB/TA cable. Dock device need always exteranl
 492                 * power supply(USB/TA cable through micro-usb cable). Dock
 493                 * device support screen output of target to separate
 494                 * monitor and mouse/keyboard for desktop mode.
 495                 *
 496                 * Features of 'USB/TA cable with Dock device'
 497                 * - Support MHL
 498                 * - Support external output feature of audio
 499                 * - Support charging through micro-usb port without data
 500                 *           connection if TA cable is connected to target.
 501                 * - Support charging and data connection through micro-usb port
 502                 *           if USB cable is connected between target and host
 503                 *           device.
 504                 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 505                 */
 506                ret = max77693_muic_set_path(info, info->path_usb, attached);
 507                if (ret < 0)
 508                        return ret;
 509
 510                extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);
 511                extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 512                goto out;
 513        case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 514                dock_id = EXTCON_DOCK;
 515                break;
 516        case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 517                dock_id = EXTCON_DOCK;
 518                if (!attached) {
 519                        extcon_set_state_sync(info->edev, EXTCON_USB, false);
 520                        extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 521                                                false);
 522                }
 523                break;
 524        default:
 525                dev_err(info->dev, "failed to detect %s dock device\n",
 526                        attached ? "attached" : "detached");
 527                return -EINVAL;
 528        }
 529
 530        /* Dock-Car/Desk/Audio, PATH:AUDIO */
 531        ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 532                                        attached);
 533        if (ret < 0)
 534                return ret;
 535        extcon_set_state_sync(info->edev, dock_id, attached);
 536
 537out:
 538        return 0;
 539}
 540
 541static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
 542                int button_type, bool attached)
 543{
 544        struct input_dev *dock = info->dock;
 545        unsigned int code;
 546
 547        switch (button_type) {
 548        case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
 549                ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
 550                /* DOCK_KEY_PREV */
 551                code = KEY_PREVIOUSSONG;
 552                break;
 553        case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
 554                ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
 555                /* DOCK_KEY_NEXT */
 556                code = KEY_NEXTSONG;
 557                break;
 558        case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 559                /* DOCK_VOL_DOWN */
 560                code = KEY_VOLUMEDOWN;
 561                break;
 562        case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 563                /* DOCK_VOL_UP */
 564                code = KEY_VOLUMEUP;
 565                break;
 566        case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
 567                ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
 568                /* DOCK_KEY_PLAY_PAUSE */
 569                code = KEY_PLAYPAUSE;
 570                break;
 571        default:
 572                dev_err(info->dev,
 573                        "failed to detect %s key (adc:0x%x)\n",
 574                        attached ? "pressed" : "released", button_type);
 575                return -EINVAL;
 576        }
 577
 578        input_event(dock, EV_KEY, code, attached);
 579        input_sync(dock);
 580
 581        return 0;
 582}
 583
 584static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
 585{
 586        int cable_type_gnd;
 587        int ret = 0;
 588        bool attached;
 589
 590        cable_type_gnd = max77693_muic_get_cable_type(info,
 591                                MAX77693_CABLE_GROUP_ADC_GND, &attached);
 592
 593        switch (cable_type_gnd) {
 594        case MAX77693_MUIC_GND_USB_HOST:
 595        case MAX77693_MUIC_GND_USB_HOST_VB:
 596                /* USB_HOST, PATH: AP_USB */
 597                ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
 598                                                attached);
 599                if (ret < 0)
 600                        return ret;
 601                extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);
 602                break;
 603        case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 604                /* Audio Video Cable with load, PATH:AUDIO */
 605                ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
 606                                                attached);
 607                if (ret < 0)
 608                        return ret;
 609                extcon_set_state_sync(info->edev, EXTCON_USB, attached);
 610                extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 611                                        attached);
 612                break;
 613        case MAX77693_MUIC_GND_MHL:
 614        case MAX77693_MUIC_GND_MHL_VB:
 615                /* MHL or MHL with USB/TA cable */
 616                extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);
 617                break;
 618        default:
 619                dev_err(info->dev, "failed to detect %s cable of gnd type\n",
 620                        attached ? "attached" : "detached");
 621                return -EINVAL;
 622        }
 623
 624        return 0;
 625}
 626
 627static int max77693_muic_jig_handler(struct max77693_muic_info *info,
 628                int cable_type, bool attached)
 629{
 630        int ret = 0;
 631        u8 path = MAX77693_CONTROL1_SW_OPEN;
 632
 633        dev_info(info->dev,
 634                "external connector is %s (adc:0x%02x)\n",
 635                attached ? "attached" : "detached", cable_type);
 636
 637        switch (cable_type) {
 638        case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:    /* ADC_JIG_USB_OFF */
 639        case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:     /* ADC_JIG_USB_ON */
 640                /* PATH:AP_USB */
 641                path = MAX77693_CONTROL1_SW_USB;
 642                break;
 643        case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:   /* ADC_JIG_UART_OFF */
 644        case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:    /* ADC_JIG_UART_ON */
 645                /* PATH:AP_UART */
 646                path = MAX77693_CONTROL1_SW_UART;
 647                break;
 648        default:
 649                dev_err(info->dev, "failed to detect %s jig cable\n",
 650                        attached ? "attached" : "detached");
 651                return -EINVAL;
 652        }
 653
 654        ret = max77693_muic_set_path(info, path, attached);
 655        if (ret < 0)
 656                return ret;
 657
 658        extcon_set_state_sync(info->edev, EXTCON_JIG, attached);
 659
 660        return 0;
 661}
 662
 663static int max77693_muic_adc_handler(struct max77693_muic_info *info)
 664{
 665        int cable_type;
 666        int button_type;
 667        bool attached;
 668        int ret = 0;
 669
 670        /* Check accessory state which is either detached or attached */
 671        cable_type = max77693_muic_get_cable_type(info,
 672                                MAX77693_CABLE_GROUP_ADC, &attached);
 673
 674        dev_info(info->dev,
 675                "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 676                attached ? "attached" : "detached", cable_type,
 677                info->prev_cable_type);
 678
 679        switch (cable_type) {
 680        case MAX77693_MUIC_ADC_GROUND:
 681                /* USB_HOST/MHL/Audio */
 682                max77693_muic_adc_ground_handler(info);
 683                break;
 684        case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 685        case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 686        case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 687        case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 688                /* JIG */
 689                ret = max77693_muic_jig_handler(info, cable_type, attached);
 690                if (ret < 0)
 691                        return ret;
 692                break;
 693        case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 694        case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:       /* Dock-Desk */
 695        case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 696                /*
 697                 * DOCK device
 698                 *
 699                 * The MAX77693 MUIC device can detect total 34 cable type
 700                 * except of charger cable and MUIC device didn't define
 701                 * specfic role of cable in the range of from 0x01 to 0x12
 702                 * of ADC value. So, can use/define cable with no role according
 703                 * to schema of hardware board.
 704                 */
 705                ret = max77693_muic_dock_handler(info, cable_type, attached);
 706                if (ret < 0)
 707                        return ret;
 708                break;
 709        case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:      /* DOCK_KEY_PREV */
 710        case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:      /* DOCK_KEY_NEXT */
 711        case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:      /* DOCK_VOL_DOWN */
 712        case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:     /* DOCK_VOL_UP */
 713        case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:     /* DOCK_KEY_PLAY_PAUSE */
 714                /*
 715                 * Button of DOCK device
 716                 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
 717                 *
 718                 * The MAX77693 MUIC device can detect total 34 cable type
 719                 * except of charger cable and MUIC device didn't define
 720                 * specfic role of cable in the range of from 0x01 to 0x12
 721                 * of ADC value. So, can use/define cable with no role according
 722                 * to schema of hardware board.
 723                 */
 724                if (attached)
 725                        button_type = info->prev_button_type = cable_type;
 726                else
 727                        button_type = info->prev_button_type;
 728
 729                ret = max77693_muic_dock_button_handler(info, button_type,
 730                                                        attached);
 731                if (ret < 0)
 732                        return ret;
 733                break;
 734        case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 735        case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 736        case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 737        case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 738        case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 739        case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 740        case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 741        case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 742        case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 743        case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 744        case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 745        case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 746        case MAX77693_MUIC_ADC_CEA936_AUDIO:
 747        case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 748        case MAX77693_MUIC_ADC_TTY_CONVERTER:
 749        case MAX77693_MUIC_ADC_UART_CABLE:
 750        case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 751        case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 752                /*
 753                 * This accessory isn't used in general case if it is specially
 754                 * needed to detect additional accessory, should implement
 755                 * proper operation when this accessory is attached/detached.
 756                 */
 757                dev_info(info->dev,
 758                        "accessory is %s but it isn't used (adc:0x%x)\n",
 759                        attached ? "attached" : "detached", cable_type);
 760                return -EAGAIN;
 761        default:
 762                dev_err(info->dev,
 763                        "failed to detect %s accessory (adc:0x%x)\n",
 764                        attached ? "attached" : "detached", cable_type);
 765                return -EINVAL;
 766        }
 767
 768        return 0;
 769}
 770
 771static int max77693_muic_chg_handler(struct max77693_muic_info *info)
 772{
 773        int chg_type;
 774        int cable_type_gnd;
 775        int cable_type;
 776        bool attached;
 777        bool cable_attached;
 778        int ret = 0;
 779
 780        chg_type = max77693_muic_get_cable_type(info,
 781                                MAX77693_CABLE_GROUP_CHG, &attached);
 782
 783        dev_info(info->dev,
 784                "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 785                        attached ? "attached" : "detached",
 786                        chg_type, info->prev_chg_type);
 787
 788        switch (chg_type) {
 789        case MAX77693_CHARGER_TYPE_USB:
 790        case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 791        case MAX77693_CHARGER_TYPE_NONE:
 792                /* Check MAX77693_CABLE_GROUP_ADC_GND type */
 793                cable_type_gnd = max77693_muic_get_cable_type(info,
 794                                        MAX77693_CABLE_GROUP_ADC_GND,
 795                                        &cable_attached);
 796                switch (cable_type_gnd) {
 797                case MAX77693_MUIC_GND_MHL:
 798                case MAX77693_MUIC_GND_MHL_VB:
 799                        /*
 800                         * MHL cable with USB/TA cable
 801                         * - MHL cable include two port(HDMI line and separate
 802                         * micro-usb port. When the target connect MHL cable,
 803                         * extcon driver check whether USB/TA cable is
 804                         * connected. If USB/TA cable is connected, extcon
 805                         * driver notify state to notifiee for charging battery.
 806                         *
 807                         * Features of 'USB/TA with MHL cable'
 808                         * - Support MHL
 809                         * - Support charging through micro-usb port without
 810                         *   data connection
 811                         */
 812                        extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 813                                                attached);
 814                        extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 815                                                cable_attached);
 816                        break;
 817                }
 818
 819                /* Check MAX77693_CABLE_GROUP_ADC type */
 820                cable_type = max77693_muic_get_cable_type(info,
 821                                        MAX77693_CABLE_GROUP_ADC,
 822                                        &cable_attached);
 823                switch (cable_type) {
 824                case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:         /* Dock-Audio */
 825                        /*
 826                         * Dock-Audio device with USB/TA cable
 827                         * - Dock device include two port(Dock-Audio and micro-
 828                         * usb port). When the target connect Dock-Audio device,
 829                         * extcon driver check whether USB/TA cable is connected
 830                         * or not. If USB/TA cable is connected, extcon driver
 831                         * notify state to notifiee for charging battery.
 832                         *
 833                         * Features of 'USB/TA cable with Dock-Audio device'
 834                         * - Support external output feature of audio.
 835                         * - Support charging through micro-usb port without
 836                         *   data connection.
 837                         */
 838                        extcon_set_state_sync(info->edev, EXTCON_USB,
 839                                                attached);
 840                        extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 841                                                attached);
 842
 843                        if (!cable_attached)
 844                                extcon_set_state_sync(info->edev, EXTCON_DOCK,
 845                                                        cable_attached);
 846                        break;
 847                case MAX77693_MUIC_ADC_RESERVED_ACC_3:          /* Dock-Smart */
 848                        /*
 849                         * Dock-Smart device with USB/TA cable
 850                         * - Dock-Desk device include three type of cable which
 851                         * are HDMI, USB for mouse/keyboard and micro-usb port
 852                         * for USB/TA cable. Dock-Smart device need always
 853                         * exteranl power supply(USB/TA cable through micro-usb
 854                         * cable). Dock-Smart device support screen output of
 855                         * target to separate monitor and mouse/keyboard for
 856                         * desktop mode.
 857                         *
 858                         * Features of 'USB/TA cable with Dock-Smart device'
 859                         * - Support MHL
 860                         * - Support external output feature of audio
 861                         * - Support charging through micro-usb port without
 862                         *   data connection if TA cable is connected to target.
 863                         * - Support charging and data connection through micro-
 864                         *   usb port if USB cable is connected between target
 865                         *   and host device
 866                         * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
 867                         */
 868                        ret = max77693_muic_set_path(info, info->path_usb,
 869                                                    attached);
 870                        if (ret < 0)
 871                                return ret;
 872
 873                        extcon_set_state_sync(info->edev, EXTCON_DOCK,
 874                                                attached);
 875                        extcon_set_state_sync(info->edev, EXTCON_DISP_MHL,
 876                                                attached);
 877                        break;
 878                }
 879
 880                /* Check MAX77693_CABLE_GROUP_CHG type */
 881                switch (chg_type) {
 882                case MAX77693_CHARGER_TYPE_NONE:
 883                        /*
 884                         * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
 885                         * cable is attached, muic device happen below two irq.
 886                         * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
 887                         *    MHL/Dock-Audio.
 888                         * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
 889                         *    USB/TA cable connected to MHL or Dock-Audio.
 890                         * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
 891                         * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
 892                         *
 893                         * If user attach MHL (with USB/TA cable and immediately
 894                         * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
 895                         * _INT2_CHGTYP irq is happened, USB/TA cable remain
 896                         * connected state to target. But USB/TA cable isn't
 897                         * connected to target. The user be face with unusual
 898                         * action. So, driver should check this situation in
 899                         * spite of, that previous charger type is N/A.
 900                         */
 901                        break;
 902                case MAX77693_CHARGER_TYPE_USB:
 903                        /* Only USB cable, PATH:AP_USB */
 904                        ret = max77693_muic_set_path(info, info->path_usb,
 905                                                    attached);
 906                        if (ret < 0)
 907                                return ret;
 908
 909                        extcon_set_state_sync(info->edev, EXTCON_USB,
 910                                                attached);
 911                        extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,
 912                                                attached);
 913                        break;
 914                case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 915                        /* Only TA cable */
 916                        extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,
 917                                                attached);
 918                        break;
 919                }
 920                break;
 921        case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 922                extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,
 923                                        attached);
 924                break;
 925        case MAX77693_CHARGER_TYPE_APPLE_500MA:
 926                extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,
 927                                        attached);
 928                break;
 929        case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 930                extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,
 931                                        attached);
 932                break;
 933        case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 934                break;
 935        default:
 936                dev_err(info->dev,
 937                        "failed to detect %s accessory (chg_type:0x%x)\n",
 938                        attached ? "attached" : "detached", chg_type);
 939                return -EINVAL;
 940        }
 941
 942        return 0;
 943}
 944
 945static void max77693_muic_irq_work(struct work_struct *work)
 946{
 947        struct max77693_muic_info *info = container_of(work,
 948                        struct max77693_muic_info, irq_work);
 949        int irq_type = -1;
 950        int i, ret = 0;
 951
 952        if (!info->edev)
 953                return;
 954
 955        mutex_lock(&info->mutex);
 956
 957        for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 958                if (info->irq == muic_irqs[i].virq)
 959                        irq_type = muic_irqs[i].irq;
 960
 961        ret = regmap_bulk_read(info->max77693->regmap_muic,
 962                        MAX77693_MUIC_REG_STATUS1, info->status, 2);
 963        if (ret) {
 964                dev_err(info->dev, "failed to read MUIC register\n");
 965                mutex_unlock(&info->mutex);
 966                return;
 967        }
 968
 969        switch (irq_type) {
 970        case MAX77693_MUIC_IRQ_INT1_ADC:
 971        case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 972        case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 973        case MAX77693_MUIC_IRQ_INT1_ADC1K:
 974                /*
 975                 * Handle all of accessory except for
 976                 * type of charger accessory.
 977                 */
 978                ret = max77693_muic_adc_handler(info);
 979                break;
 980        case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 981        case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 982        case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 983        case MAX77693_MUIC_IRQ_INT2_DXOVP:
 984        case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 985        case MAX77693_MUIC_IRQ_INT2_VIDRM:
 986                /* Handle charger accessory */
 987                ret = max77693_muic_chg_handler(info);
 988                break;
 989        case MAX77693_MUIC_IRQ_INT3_EOC:
 990        case MAX77693_MUIC_IRQ_INT3_CGMBC:
 991        case MAX77693_MUIC_IRQ_INT3_OVP:
 992        case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 993        case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 994        case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 995                break;
 996        default:
 997                dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 998                                irq_type);
 999                mutex_unlock(&info->mutex);
1000                return;
1001        }
1002
1003        if (ret < 0)
1004                dev_err(info->dev, "failed to handle MUIC interrupt\n");
1005
1006        mutex_unlock(&info->mutex);
1007}
1008
1009static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
1010{
1011        struct max77693_muic_info *info = data;
1012
1013        info->irq = irq;
1014        schedule_work(&info->irq_work);
1015
1016        return IRQ_HANDLED;
1017}
1018
1019static const struct regmap_config max77693_muic_regmap_config = {
1020        .reg_bits = 8,
1021        .val_bits = 8,
1022};
1023
1024static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
1025{
1026        int ret = 0;
1027        int adc;
1028        int chg_type;
1029        bool attached;
1030
1031        mutex_lock(&info->mutex);
1032
1033        /* Read STATUSx register to detect accessory */
1034        ret = regmap_bulk_read(info->max77693->regmap_muic,
1035                        MAX77693_MUIC_REG_STATUS1, info->status, 2);
1036        if (ret) {
1037                dev_err(info->dev, "failed to read MUIC register\n");
1038                mutex_unlock(&info->mutex);
1039                return ret;
1040        }
1041
1042        adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
1043                                        &attached);
1044        if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
1045                ret = max77693_muic_adc_handler(info);
1046                if (ret < 0) {
1047                        dev_err(info->dev, "Cannot detect accessory\n");
1048                        mutex_unlock(&info->mutex);
1049                        return ret;
1050                }
1051        }
1052
1053        chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
1054                                        &attached);
1055        if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
1056                ret = max77693_muic_chg_handler(info);
1057                if (ret < 0) {
1058                        dev_err(info->dev, "Cannot detect charger accessory\n");
1059                        mutex_unlock(&info->mutex);
1060                        return ret;
1061                }
1062        }
1063
1064        mutex_unlock(&info->mutex);
1065
1066        return 0;
1067}
1068
1069static void max77693_muic_detect_cable_wq(struct work_struct *work)
1070{
1071        struct max77693_muic_info *info = container_of(to_delayed_work(work),
1072                                struct max77693_muic_info, wq_detcable);
1073
1074        max77693_muic_detect_accessory(info);
1075}
1076
1077static int max77693_muic_probe(struct platform_device *pdev)
1078{
1079        struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
1080        struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
1081        struct max77693_muic_info *info;
1082        struct max77693_reg_data *init_data;
1083        int num_init_data;
1084        int delay_jiffies;
1085        int ret;
1086        int i;
1087        unsigned int id;
1088
1089        info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
1090                                   GFP_KERNEL);
1091        if (!info)
1092                return -ENOMEM;
1093
1094        info->dev = &pdev->dev;
1095        info->max77693 = max77693;
1096        if (info->max77693->regmap_muic) {
1097                dev_dbg(&pdev->dev, "allocate register map\n");
1098        } else {
1099                info->max77693->regmap_muic = devm_regmap_init_i2c(
1100                                                info->max77693->i2c_muic,
1101                                                &max77693_muic_regmap_config);
1102                if (IS_ERR(info->max77693->regmap_muic)) {
1103                        ret = PTR_ERR(info->max77693->regmap_muic);
1104                        dev_err(max77693->dev,
1105                                "failed to allocate register map: %d\n", ret);
1106                        return ret;
1107                }
1108        }
1109
1110        /* Register input device for button of dock device */
1111        info->dock = devm_input_allocate_device(&pdev->dev);
1112        if (!info->dock) {
1113                dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
1114                return -ENOMEM;
1115        }
1116        info->dock->name = "max77693-muic/dock";
1117        info->dock->phys = "max77693-muic/extcon";
1118        info->dock->dev.parent = &pdev->dev;
1119
1120        __set_bit(EV_REP, info->dock->evbit);
1121
1122        input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
1123        input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
1124        input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
1125        input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
1126        input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
1127
1128        ret = input_register_device(info->dock);
1129        if (ret < 0) {
1130                dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
1131                                ret);
1132                return ret;
1133        }
1134
1135        platform_set_drvdata(pdev, info);
1136        mutex_init(&info->mutex);
1137
1138        INIT_WORK(&info->irq_work, max77693_muic_irq_work);
1139
1140        /* Support irq domain for MAX77693 MUIC device */
1141        for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
1142                struct max77693_muic_irq *muic_irq = &muic_irqs[i];
1143                int virq;
1144
1145                virq = regmap_irq_get_virq(max77693->irq_data_muic,
1146                                        muic_irq->irq);
1147                if (virq <= 0)
1148                        return -EINVAL;
1149                muic_irq->virq = virq;
1150
1151                ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
1152                                max77693_muic_irq_handler,
1153                                IRQF_NO_SUSPEND,
1154                                muic_irq->name, info);
1155                if (ret) {
1156                        dev_err(&pdev->dev,
1157                                "failed: irq request (IRQ: %d, error :%d)\n",
1158                                muic_irq->irq, ret);
1159                        return ret;
1160                }
1161        }
1162
1163        /* Initialize extcon device */
1164        info->edev = devm_extcon_dev_allocate(&pdev->dev,
1165                                              max77693_extcon_cable);
1166        if (IS_ERR(info->edev)) {
1167                dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
1168                return -ENOMEM;
1169        }
1170
1171        ret = devm_extcon_dev_register(&pdev->dev, info->edev);
1172        if (ret) {
1173                dev_err(&pdev->dev, "failed to register extcon device\n");
1174                return ret;
1175        }
1176
1177        /* Initialize MUIC register by using platform data or default data */
1178        if (pdata && pdata->muic_data) {
1179                init_data = pdata->muic_data->init_data;
1180                num_init_data = pdata->muic_data->num_init_data;
1181        } else {
1182                init_data = default_init_data;
1183                num_init_data = ARRAY_SIZE(default_init_data);
1184        }
1185
1186        for (i = 0; i < num_init_data; i++) {
1187                regmap_write(info->max77693->regmap_muic,
1188                                init_data[i].addr,
1189                                init_data[i].data);
1190        }
1191
1192        if (pdata && pdata->muic_data) {
1193                struct max77693_muic_platform_data *muic_pdata
1194                                                   = pdata->muic_data;
1195
1196                /*
1197                 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
1198                 * h/w path of COMP2/COMN1 on CONTROL1 register.
1199                 */
1200                if (muic_pdata->path_uart)
1201                        info->path_uart = muic_pdata->path_uart;
1202                else
1203                        info->path_uart = MAX77693_CONTROL1_SW_UART;
1204
1205                if (muic_pdata->path_usb)
1206                        info->path_usb = muic_pdata->path_usb;
1207                else
1208                        info->path_usb = MAX77693_CONTROL1_SW_USB;
1209
1210                /*
1211                 * Default delay time for detecting cable state
1212                 * after certain time.
1213                 */
1214                if (muic_pdata->detcable_delay_ms)
1215                        delay_jiffies =
1216                                msecs_to_jiffies(muic_pdata->detcable_delay_ms);
1217                else
1218                        delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1219        } else {
1220                info->path_usb = MAX77693_CONTROL1_SW_USB;
1221                info->path_uart = MAX77693_CONTROL1_SW_UART;
1222                delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
1223        }
1224
1225        /* Set initial path for UART */
1226         max77693_muic_set_path(info, info->path_uart, true);
1227
1228        /* Check revision number of MUIC device*/
1229        ret = regmap_read(info->max77693->regmap_muic,
1230                        MAX77693_MUIC_REG_ID, &id);
1231        if (ret < 0) {
1232                dev_err(&pdev->dev, "failed to read revision number\n");
1233                return ret;
1234        }
1235        dev_info(info->dev, "device ID : 0x%x\n", id);
1236
1237        /* Set ADC debounce time */
1238        max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
1239
1240        /*
1241         * Detect accessory after completing the initialization of platform
1242         *
1243         * - Use delayed workqueue to detect cable state and then
1244         * notify cable state to notifiee/platform through uevent.
1245         * After completing the booting of platform, the extcon provider
1246         * driver should notify cable state to upper layer.
1247         */
1248        INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
1249        queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
1250                        delay_jiffies);
1251
1252        return ret;
1253}
1254
1255static int max77693_muic_remove(struct platform_device *pdev)
1256{
1257        struct max77693_muic_info *info = platform_get_drvdata(pdev);
1258
1259        cancel_work_sync(&info->irq_work);
1260        input_unregister_device(info->dock);
1261
1262        return 0;
1263}
1264
1265static struct platform_driver max77693_muic_driver = {
1266        .driver         = {
1267                .name   = DEV_NAME,
1268        },
1269        .probe          = max77693_muic_probe,
1270        .remove         = max77693_muic_remove,
1271};
1272
1273module_platform_driver(max77693_muic_driver);
1274
1275MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
1276MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
1277MODULE_LICENSE("GPL");
1278MODULE_ALIAS("platform:extcon-max77693");
1279