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