drivers/extcon/extcon-max77693.c

   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/interrupt.h>
  23 #include <linux/err.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/mfd/max77693.h>
  26 #include <linux/mfd/max77693-private.h>
  27 #include <linux/extcon.h>
  28 #include <linux/regmap.h>
  29 #include <linux/irqdomain.h>
  30
  31 #define DEV_NAME                        "max77693-muic"
  32
  33 /* MAX77693 MUIC - STATUS1~3 Register */
  34 #define STATUS1_ADC_SHIFT               (0)
  35 #define STATUS1_ADCLOW_SHIFT            (5)
  36 #define STATUS1_ADCERR_SHIFT            (6)
  37 #define STATUS1_ADC1K_SHIFT             (7)
  38 #define STATUS1_ADC_MASK                (0x1f << STATUS1_ADC_SHIFT)
  39 #define STATUS1_ADCLOW_MASK             (0x1 << STATUS1_ADCLOW_SHIFT)
  40 #define STATUS1_ADCERR_MASK             (0x1 << STATUS1_ADCERR_SHIFT)
  41 #define STATUS1_ADC1K_MASK              (0x1 << STATUS1_ADC1K_SHIFT)
  42
  43 #define STATUS2_CHGTYP_SHIFT            (0)
  44 #define STATUS2_CHGDETRUN_SHIFT         (3)
  45 #define STATUS2_DCDTMR_SHIFT            (4)
  46 #define STATUS2_DXOVP_SHIFT             (5)
  47 #define STATUS2_VBVOLT_SHIFT            (6)
  48 #define STATUS2_VIDRM_SHIFT             (7)
  49 #define STATUS2_CHGTYP_MASK             (0x7 << STATUS2_CHGTYP_SHIFT)
  50 #define STATUS2_CHGDETRUN_MASK          (0x1 << STATUS2_CHGDETRUN_SHIFT)
  51 #define STATUS2_DCDTMR_MASK             (0x1 << STATUS2_DCDTMR_SHIFT)
  52 #define STATUS2_DXOVP_MASK              (0x1 << STATUS2_DXOVP_SHIFT)
  53 #define STATUS2_VBVOLT_MASK             (0x1 << STATUS2_VBVOLT_SHIFT)
  54 #define STATUS2_VIDRM_MASK              (0x1 << STATUS2_VIDRM_SHIFT)
  55
  56 #define STATUS3_OVP_SHIFT               (2)
  57 #define STATUS3_OVP_MASK                (0x1 << STATUS3_OVP_SHIFT)
  58
  59 /* MAX77693 CDETCTRL1~2 register */
  60 #define CDETCTRL1_CHGDETEN_SHIFT        (0)
  61 #define CDETCTRL1_CHGTYPMAN_SHIFT       (1)
  62 #define CDETCTRL1_DCDEN_SHIFT           (2)
  63 #define CDETCTRL1_DCD2SCT_SHIFT         (3)
  64 #define CDETCTRL1_CDDELAY_SHIFT         (4)
  65 #define CDETCTRL1_DCDCPL_SHIFT          (5)
  66 #define CDETCTRL1_CDPDET_SHIFT          (7)
  67 #define CDETCTRL1_CHGDETEN_MASK         (0x1 << CDETCTRL1_CHGDETEN_SHIFT)
  68 #define CDETCTRL1_CHGTYPMAN_MASK        (0x1 << CDETCTRL1_CHGTYPMAN_SHIFT)
  69 #define CDETCTRL1_DCDEN_MASK            (0x1 << CDETCTRL1_DCDEN_SHIFT)
  70 #define CDETCTRL1_DCD2SCT_MASK          (0x1 << CDETCTRL1_DCD2SCT_SHIFT)
  71 #define CDETCTRL1_CDDELAY_MASK          (0x1 << CDETCTRL1_CDDELAY_SHIFT)
  72 #define CDETCTRL1_DCDCPL_MASK           (0x1 << CDETCTRL1_DCDCPL_SHIFT)
  73 #define CDETCTRL1_CDPDET_MASK           (0x1 << CDETCTRL1_CDPDET_SHIFT)
  74
  75 #define CDETCTRL2_VIDRMEN_SHIFT         (1)
  76 #define CDETCTRL2_DXOVPEN_SHIFT         (3)
  77 #define CDETCTRL2_VIDRMEN_MASK          (0x1 << CDETCTRL2_VIDRMEN_SHIFT)
  78 #define CDETCTRL2_DXOVPEN_MASK          (0x1 << CDETCTRL2_DXOVPEN_SHIFT)
  79
  80 /* MAX77693 MUIC - CONTROL1~3 register */
  81 #define COMN1SW_SHIFT                   (0)
  82 #define COMP2SW_SHIFT                   (3)
  83 #define COMN1SW_MASK                    (0x7 << COMN1SW_SHIFT)
  84 #define COMP2SW_MASK                    (0x7 << COMP2SW_SHIFT)
  85 #define COMP_SW_MASK                    (COMP2SW_MASK | COMN1SW_MASK)
  86 #define CONTROL1_SW_USB                 ((1 << COMP2SW_SHIFT) \
  87                                                 | (1 << COMN1SW_SHIFT))
  88 #define CONTROL1_SW_AUDIO               ((2 << COMP2SW_SHIFT) \
  89                                                 | (2 << COMN1SW_SHIFT))
  90 #define CONTROL1_SW_UART                ((3 << COMP2SW_SHIFT) \
  91                                                 | (3 << COMN1SW_SHIFT))
  92 #define CONTROL1_SW_OPEN                ((0 << COMP2SW_SHIFT) \
  93                                                 | (0 << COMN1SW_SHIFT))
  94
  95 #define CONTROL2_LOWPWR_SHIFT           (0)
  96 #define CONTROL2_ADCEN_SHIFT            (1)
  97 #define CONTROL2_CPEN_SHIFT             (2)
  98 #define CONTROL2_SFOUTASRT_SHIFT        (3)
  99 #define CONTROL2_SFOUTORD_SHIFT         (4)
 100 #define CONTROL2_ACCDET_SHIFT           (5)
 101 #define CONTROL2_USBCPINT_SHIFT         (6)
 102 #define CONTROL2_RCPS_SHIFT             (7)
 103 #define CONTROL2_LOWPWR_MASK            (0x1 << CONTROL2_LOWPWR_SHIFT)
 104 #define CONTROL2_ADCEN_MASK             (0x1 << CONTROL2_ADCEN_SHIFT)
 105 #define CONTROL2_CPEN_MASK              (0x1 << CONTROL2_CPEN_SHIFT)
 106 #define CONTROL2_SFOUTASRT_MASK         (0x1 << CONTROL2_SFOUTASRT_SHIFT)
 107 #define CONTROL2_SFOUTORD_MASK          (0x1 << CONTROL2_SFOUTORD_SHIFT)
 108 #define CONTROL2_ACCDET_MASK            (0x1 << CONTROL2_ACCDET_SHIFT)
 109 #define CONTROL2_USBCPINT_MASK          (0x1 << CONTROL2_USBCPINT_SHIFT)
 110 #define CONTROL2_RCPS_MASK              (0x1 << CONTROL2_RCPS_SHIFT)
 111
 112 #define CONTROL3_JIGSET_SHIFT           (0)
 113 #define CONTROL3_BTLDSET_SHIFT          (2)
 114 #define CONTROL3_ADCDBSET_SHIFT         (4)
 115 #define CONTROL3_JIGSET_MASK            (0x3 << CONTROL3_JIGSET_SHIFT)
 116 #define CONTROL3_BTLDSET_MASK           (0x3 << CONTROL3_BTLDSET_SHIFT)
 117 #define CONTROL3_ADCDBSET_MASK          (0x3 << CONTROL3_ADCDBSET_SHIFT)
 118
 119 enum max77693_muic_adc_debounce_time {
 120         ADC_DEBOUNCE_TIME_5MS = 0,
 121         ADC_DEBOUNCE_TIME_10MS,
 122         ADC_DEBOUNCE_TIME_25MS,
 123         ADC_DEBOUNCE_TIME_38_62MS,
 124 };
 125
 126 struct max77693_muic_info {
 127         struct device *dev;
 128         struct max77693_dev *max77693;
 129         struct extcon_dev *edev;
 130         int prev_adc;
 131         int prev_adc_gnd;
 132         int prev_chg_type;
 133         u8 status[2];
 134
 135         int irq;
 136         struct work_struct irq_work;
 137         struct mutex mutex;
 138 };
 139
 140 enum max77693_muic_charger_type {
 141         MAX77693_CHARGER_TYPE_NONE = 0,
 142         MAX77693_CHARGER_TYPE_USB,
 143         MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
 144         MAX77693_CHARGER_TYPE_DEDICATED_CHG,
 145         MAX77693_CHARGER_TYPE_APPLE_500MA,
 146         MAX77693_CHARGER_TYPE_APPLE_1A_2A,
 147         MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
 148 };
 149
 150 /**
 151  * struct max77693_muic_irq
 152  * @irq: the index of irq list of MUIC device.
 153  * @name: the name of irq.
 154  * @virq: the virtual irq to use irq domain
 155  */
 156 struct max77693_muic_irq {
 157         unsigned int irq;
 158         const char *name;
 159         unsigned int virq;
 160 };
 161
 162 static struct max77693_muic_irq muic_irqs[] = {
 163         { MAX77693_MUIC_IRQ_INT1_ADC,           "muic-ADC" },
 164         { MAX77693_MUIC_IRQ_INT1_ADC_LOW,       "muic-ADCLOW" },
 165         { MAX77693_MUIC_IRQ_INT1_ADC_ERR,       "muic-ADCError" },
 166         { MAX77693_MUIC_IRQ_INT1_ADC1K,         "muic-ADC1K" },
 167         { MAX77693_MUIC_IRQ_INT2_CHGTYP,        "muic-CHGTYP" },
 168         { MAX77693_MUIC_IRQ_INT2_CHGDETREUN,    "muic-CHGDETREUN" },
 169         { MAX77693_MUIC_IRQ_INT2_DCDTMR,        "muic-DCDTMR" },
 170         { MAX77693_MUIC_IRQ_INT2_DXOVP,         "muic-DXOVP" },
 171         { MAX77693_MUIC_IRQ_INT2_VBVOLT,        "muic-VBVOLT" },
 172         { MAX77693_MUIC_IRQ_INT2_VIDRM,         "muic-VIDRM" },
 173         { MAX77693_MUIC_IRQ_INT3_EOC,           "muic-EOC" },
 174         { MAX77693_MUIC_IRQ_INT3_CGMBC,         "muic-CGMBC" },
 175         { MAX77693_MUIC_IRQ_INT3_OVP,           "muic-OVP" },
 176         { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR,    "muic-MBCCHG_ERR" },
 177         { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED,   "muic-CHG_ENABLED" },
 178         { MAX77693_MUIC_IRQ_INT3_BAT_DET,       "muic-BAT_DET" },
 179 };
 180
 181 /* Define supported accessory type */
 182 enum max77693_muic_acc_type {
 183         MAX77693_MUIC_ADC_GROUND = 0x0,
 184         MAX77693_MUIC_ADC_SEND_END_BUTTON,
 185         MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
 186         MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
 187         MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
 188         MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
 189         MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
 190         MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
 191         MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
 192         MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
 193         MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
 194         MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
 195         MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
 196         MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
 197         MAX77693_MUIC_ADC_RESERVED_ACC_1,
 198         MAX77693_MUIC_ADC_RESERVED_ACC_2,
 199         MAX77693_MUIC_ADC_RESERVED_ACC_3,
 200         MAX77693_MUIC_ADC_RESERVED_ACC_4,
 201         MAX77693_MUIC_ADC_RESERVED_ACC_5,
 202         MAX77693_MUIC_ADC_CEA936_AUDIO,
 203         MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
 204         MAX77693_MUIC_ADC_TTY_CONVERTER,
 205         MAX77693_MUIC_ADC_UART_CABLE,
 206         MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
 207         MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
 208         MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
 209         MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
 210         MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
 211         MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
 212         MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
 213         MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
 214         MAX77693_MUIC_ADC_OPEN,
 215
 216         /* The below accessories have same ADC value so ADCLow and
 217            ADC1K bit is used to separate specific accessory */
 218         MAX77693_MUIC_GND_USB_OTG = 0x100,      /* ADC:0x0, ADCLow:0, ADC1K:0 */
 219         MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, ADCLow:1, ADC1K:0 */
 220         MAX77693_MUIC_GND_MHL_CABLE = 0x103,    /* ADC:0x0, ADCLow:1, ADC1K:1 */
 221 };
 222
 223 /* MAX77693 MUIC device support below list of accessories(external connector) */
 224 const char *max77693_extcon_cable[] = {
 225         [0] = "USB",
 226         [1] = "USB-Host",
 227         [2] = "TA",
 228         [3] = "Fast-charger",
 229         [4] = "Slow-charger",
 230         [5] = "Charge-downstream",
 231         [6] = "MHL",
 232         [7] = "Audio-video-load",
 233         [8] = "Audio-video-noload",
 234         [9] = "JIG",
 235
 236         NULL,
 237 };
 238
 239 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
 240                 enum max77693_muic_adc_debounce_time time)
 241 {
 242         int ret = 0;
 243         u8 ctrl3;
 244
 245         switch (time) {
 246         case ADC_DEBOUNCE_TIME_5MS:
 247         case ADC_DEBOUNCE_TIME_10MS:
 248         case ADC_DEBOUNCE_TIME_25MS:
 249         case ADC_DEBOUNCE_TIME_38_62MS:
 250                 ret = max77693_read_reg(info->max77693->regmap_muic,
 251                                 MAX77693_MUIC_REG_CTRL3, &ctrl3);
 252                 ctrl3 &= ~CONTROL3_ADCDBSET_MASK;
 253                 ctrl3 |= (time << CONTROL3_ADCDBSET_SHIFT);
 254
 255                 ret = max77693_write_reg(info->max77693->regmap_muic,
 256                                 MAX77693_MUIC_REG_CTRL3, ctrl3);
 257                 if (ret) {
 258                         dev_err(info->dev, "failed to set ADC debounce time\n");
 259                         ret = -EINVAL;
 260                 }
 261                 break;
 262         default:
 263                 dev_err(info->dev, "invalid ADC debounce time\n");
 264                 ret = -EINVAL;
 265                 break;
 266         }
 267
 268         return ret;
 269 };
 270
 271 static int max77693_muic_set_path(struct max77693_muic_info *info,
 272                 u8 val, bool attached)
 273 {
 274         int ret = 0;
 275         u8 ctrl1, ctrl2 = 0;
 276
 277         if (attached)
 278                 ctrl1 = val;
 279         else
 280                 ctrl1 = CONTROL1_SW_OPEN;
 281
 282         ret = max77693_update_reg(info->max77693->regmap_muic,
 283                         MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
 284         if (ret < 0) {
 285                 dev_err(info->dev, "failed to update MUIC register\n");
 286                 goto out;
 287         }
 288
 289         if (attached)
 290                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 291         else
 292                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 293
 294         ret = max77693_update_reg(info->max77693->regmap_muic,
 295                         MAX77693_MUIC_REG_CTRL2, ctrl2,
 296                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
 297         if (ret < 0) {
 298                 dev_err(info->dev, "failed to update MUIC register\n");
 299                 goto out;
 300         }
 301
 302         dev_info(info->dev,
 303                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 304                 ctrl1, ctrl2, attached ? "attached" : "detached");
 305 out:
 306         return ret;
 307 }
 308
 309 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
 310                 bool attached)
 311 {
 312         int ret = 0;
 313         int type;
 314         int adc, adc1k, adclow;
 315
 316         if (attached) {
 317                 adc = info->status[0] & STATUS1_ADC_MASK;
 318                 adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 319                 adclow >>= STATUS1_ADCLOW_SHIFT;
 320                 adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 321                 adc1k >>= STATUS1_ADC1K_SHIFT;
 322
 323                 /**
 324                  * [0x1][ADCLow][ADC1K]
 325                  * [0x1    0       0  ] : USB_OTG
 326                  * [0x1    1       0  ] : Audio Video Cable with load
 327                  * [0x1    1       1  ] : MHL
 328                  */
 329                 type = ((0x1 << 8) | (adclow << 1) | adc1k);
 330
 331                 /* Store previous ADC value to handle accessory
 332                    when accessory will be detached */
 333                 info->prev_adc = adc;
 334                 info->prev_adc_gnd = type;
 335         } else
 336                 type = info->prev_adc_gnd;
 337
 338         switch (type) {
 339         case MAX77693_MUIC_GND_USB_OTG:
 340                 /* USB_OTG */
 341                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 342                 if (ret < 0)
 343                         goto out;
 344                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 345                 break;
 346         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 347                 /* Audio Video Cable with load */
 348                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 349                 if (ret < 0)
 350                         goto out;
 351                 extcon_set_cable_state(info->edev,
 352                                 "Audio-video-load", attached);
 353                 break;
 354         case MAX77693_MUIC_GND_MHL_CABLE:
 355                 /* MHL */
 356                 extcon_set_cable_state(info->edev, "MHL", attached);
 357                 break;
 358         default:
 359                 dev_err(info->dev, "faild to detect %s accessory\n",
 360                         attached ? "attached" : "detached");
 361                 dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
 362                         adc, adclow, adc1k);
 363                 ret = -EINVAL;
 364                 break;
 365         }
 366
 367 out:
 368         return ret;
 369 }
 370
 371 static int max77693_muic_adc_handler(struct max77693_muic_info *info,
 372                 int curr_adc, bool attached)
 373 {
 374         int ret = 0;
 375         int adc;
 376
 377         if (attached) {
 378                 /* Store ADC value to handle accessory
 379                    when accessory will be detached */
 380                 info->prev_adc = curr_adc;
 381                 adc = curr_adc;
 382         } else
 383                 adc = info->prev_adc;
 384
 385         dev_info(info->dev,
 386                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 387                 attached ? "attached" : "detached", curr_adc, info->prev_adc);
 388
 389         switch (adc) {
 390         case MAX77693_MUIC_ADC_GROUND:
 391                 /* USB_OTG/MHL/Audio */
 392                 max77693_muic_adc_ground_handler(info, attached);
 393                 break;
 394         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 395         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 396                 /* USB */
 397                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 398                 if (ret < 0)
 399                         goto out;
 400                 extcon_set_cable_state(info->edev, "USB", attached);
 401                 break;
 402         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 403         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 404                 /* JIG */
 405                 ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached);
 406                 if (ret < 0)
 407                         goto out;
 408                 extcon_set_cable_state(info->edev, "JIG", attached);
 409                 break;
 410         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
 411                 /* Audio Video cable with no-load */
 412                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 413                 if (ret < 0)
 414                         goto out;
 415                 extcon_set_cable_state(info->edev,
 416                                 "Audio-video-noload", attached);
 417                 break;
 418         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 419         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 420         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 421         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
 422         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 423         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 424         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 425         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
 426         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 427         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 428         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 429         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 430         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
 431         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 432         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 433         case MAX77693_MUIC_ADC_RESERVED_ACC_3:
 434         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 435         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 436         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 437         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 438         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 439         case MAX77693_MUIC_ADC_UART_CABLE:
 440         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 441         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
 442         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 443                 /* This accessory isn't used in general case if it is specially
 444                    needed to detect additional accessory, should implement
 445                    proper operation when this accessory is attached/detached. */
 446                 dev_info(info->dev,
 447                         "accessory is %s but it isn't used (adc:0x%x)\n",
 448                         attached ? "attached" : "detached", adc);
 449                 goto out;
 450         default:
 451                 dev_err(info->dev,
 452                         "failed to detect %s accessory (adc:0x%x)\n",
 453                         attached ? "attached" : "detached", adc);
 454                 ret = -EINVAL;
 455                 goto out;
 456         }
 457
 458 out:
 459         return ret;
 460 }
 461
 462 static int max77693_muic_chg_handler(struct max77693_muic_info *info,
 463                 int curr_chg_type, bool attached)
 464 {
 465         int ret = 0;
 466         int chg_type;
 467
 468         if (attached) {
 469                 /* Store previous charger type to control
 470                    when charger accessory will be detached */
 471                 info->prev_chg_type = curr_chg_type;
 472                 chg_type = curr_chg_type;
 473         } else
 474                 chg_type = info->prev_chg_type;
 475
 476         dev_info(info->dev,
 477                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 478                         attached ? "attached" : "detached",
 479                         curr_chg_type, info->prev_chg_type);
 480
 481         switch (chg_type) {
 482         case MAX77693_CHARGER_TYPE_USB:
 483                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 484                 if (ret < 0)
 485                         goto out;
 486                 extcon_set_cable_state(info->edev, "USB", attached);
 487                 break;
 488         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 489                 extcon_set_cable_state(info->edev,
 490                                 "Charge-downstream", attached);
 491                 break;
 492         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 493                 extcon_set_cable_state(info->edev, "TA", attached);
 494                 break;
 495         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 496                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 497                 break;
 498         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 499                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 500                 break;
 501         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 502                 break;
 503         default:
 504                 dev_err(info->dev,
 505                         "failed to detect %s accessory (chg_type:0x%x)\n",
 506                         attached ? "attached" : "detached", chg_type);
 507                 ret = -EINVAL;
 508                 goto out;
 509         }
 510
 511 out:
 512         return ret;
 513 }
 514
 515 static void max77693_muic_irq_work(struct work_struct *work)
 516 {
 517         struct max77693_muic_info *info = container_of(work,
 518                         struct max77693_muic_info, irq_work);
 519         int curr_adc, curr_chg_type;
 520         int irq_type = -1;
 521         int i, ret = 0;
 522         bool attached = true;
 523
 524         if (!info->edev)
 525                 return;
 526
 527         mutex_lock(&info->mutex);
 528
 529         for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
 530                 if (info->irq == muic_irqs[i].virq)
 531                         irq_type = muic_irqs[i].irq;
 532
 533         ret = max77693_bulk_read(info->max77693->regmap_muic,
 534                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
 535         if (ret) {
 536                 dev_err(info->dev, "failed to read MUIC register\n");
 537                 mutex_unlock(&info->mutex);
 538                 return;
 539         }
 540
 541         switch (irq_type) {
 542         case MAX77693_MUIC_IRQ_INT1_ADC:
 543         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 544         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 545         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 546                 /* Handle all of accessory except for
 547                    type of charger accessory */
 548                 curr_adc = info->status[0] & STATUS1_ADC_MASK;
 549                 curr_adc >>= STATUS1_ADC_SHIFT;
 550
 551                 /* Check accossory state which is either detached or attached */
 552                 if (curr_adc == MAX77693_MUIC_ADC_OPEN)
 553                         attached = false;
 554
 555                 ret = max77693_muic_adc_handler(info, curr_adc, attached);
 556                 break;
 557         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 558         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 559         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 560         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 561         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 562         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 563                 /* Handle charger accessory */
 564                 curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 565                 curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
 566
 567                 /* Check charger accossory state which
 568                    is either detached or attached */
 569                 if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
 570                         attached = false;
 571
 572                 ret = max77693_muic_chg_handler(info, curr_chg_type, attached);
 573                 break;
 574         case MAX77693_MUIC_IRQ_INT3_EOC:
 575         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 576         case MAX77693_MUIC_IRQ_INT3_OVP:
 577         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 578         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 579         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 580                 break;
 581         default:
 582                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 583                                 irq_type);
 584                 break;
 585         }
 586
 587         if (ret < 0)
 588                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 589
 590         mutex_unlock(&info->mutex);
 591
 592         return;
 593 }
 594
 595 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
 596 {
 597         struct max77693_muic_info *info = data;
 598
 599         info->irq = irq;
 600         schedule_work(&info->irq_work);
 601
 602         return IRQ_HANDLED;
 603 }
 604
 605 static struct regmap_config max77693_muic_regmap_config = {
 606         .reg_bits = 8,
 607         .val_bits = 8,
 608 };
 609
 610 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
 611 {
 612         int ret = 0;
 613         int adc, chg_type;
 614
 615         mutex_lock(&info->mutex);
 616
 617         /* Read STATUSx register to detect accessory */
 618         ret = max77693_bulk_read(info->max77693->regmap_muic,
 619                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
 620         if (ret) {
 621                 dev_err(info->dev, "failed to read MUIC register\n");
 622                 mutex_unlock(&info->mutex);
 623                 return -EINVAL;
 624         }
 625
 626         adc = info->status[0] & STATUS1_ADC_MASK;
 627         adc >>= STATUS1_ADC_SHIFT;
 628
 629         if (adc != MAX77693_MUIC_ADC_OPEN) {
 630                 dev_info(info->dev,
 631                         "external connector is attached (adc:0x%02x)\n", adc);
 632
 633                 ret = max77693_muic_adc_handler(info, adc, true);
 634                 if (ret < 0)
 635                         dev_err(info->dev, "failed to detect accessory\n");
 636                 goto out;
 637         }
 638
 639         chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 640         chg_type >>= STATUS2_CHGTYP_SHIFT;
 641
 642         if (chg_type != MAX77693_CHARGER_TYPE_NONE) {
 643                 dev_info(info->dev,
 644                         "external connector is attached (chg_type:0x%x)\n",
 645                         chg_type);
 646
 647                 max77693_muic_chg_handler(info, chg_type, true);
 648                 if (ret < 0)
 649                         dev_err(info->dev, "failed to detect charger accessory\n");
 650         }
 651
 652 out:
 653         mutex_unlock(&info->mutex);
 654         return ret;
 655 }
 656
 657 static int __devinit max77693_muic_probe(struct platform_device *pdev)
 658 {
 659         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
 660         struct max77693_muic_info *info;
 661         int ret, i;
 662         u8 id;
 663
 664         info = kzalloc(sizeof(struct max77693_muic_info), GFP_KERNEL);
 665         if (!info) {
 666                 dev_err(&pdev->dev, "failed to allocate memory\n");
 667                 ret = -ENOMEM;
 668                 goto err_kfree;
 669         }
 670         info->dev = &pdev->dev;
 671         info->max77693 = max77693;
 672         if (info->max77693->regmap_muic)
 673                 dev_dbg(&pdev->dev, "allocate register map\n");
 674         else {
 675                 info->max77693->regmap_muic = devm_regmap_init_i2c(
 676                                                 info->max77693->muic,
 677                                                 &max77693_muic_regmap_config);
 678                 if (IS_ERR(info->max77693->regmap_muic)) {
 679                         ret = PTR_ERR(info->max77693->regmap_muic);
 680                         dev_err(max77693->dev,
 681                                 "failed to allocate register map: %d\n", ret);
 682                         goto err_regmap;
 683                 }
 684         }
 685         platform_set_drvdata(pdev, info);
 686         mutex_init(&info->mutex);
 687
 688         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
 689
 690         /* Support irq domain for MAX77693 MUIC device */
 691         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
 692                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
 693                 int virq = 0;
 694
 695                 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
 696                 if (!virq)
 697                         goto err_irq;
 698                 muic_irq->virq = virq;
 699
 700                 ret = request_threaded_irq(virq, NULL,
 701                                 max77693_muic_irq_handler,
 702                                 0, muic_irq->name, info);
 703                 if (ret) {
 704                         dev_err(&pdev->dev,
 705                                 "failed: irq request (IRQ: %d,"
 706                                 " error :%d)\n",
 707                                 muic_irq->irq, ret);
 708
 709                         for (i = i - 1; i >= 0; i--)
 710                                 free_irq(muic_irq->virq, info);
 711                         goto err_irq;
 712                 }
 713         }
 714
 715         /* Initialize extcon device */
 716         info->edev = kzalloc(sizeof(struct extcon_dev), GFP_KERNEL);
 717         if (!info->edev) {
 718                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
 719                 ret = -ENOMEM;
 720                 goto err_irq;
 721         }
 722         info->edev->name = DEV_NAME;
 723         info->edev->supported_cable = max77693_extcon_cable;
 724         ret = extcon_dev_register(info->edev, NULL);
 725         if (ret) {
 726                 dev_err(&pdev->dev, "failed to register extcon device\n");
 727                 goto err_extcon;
 728         }
 729
 730         /* Check revision number of MUIC device*/
 731         ret = max77693_read_reg(info->max77693->regmap_muic,
 732                         MAX77693_MUIC_REG_ID, &id);
 733         if (ret < 0) {
 734                 dev_err(&pdev->dev, "failed to read revision number\n");
 735                 goto err_extcon;
 736         }
 737         dev_info(info->dev, "device ID : 0x%x\n", id);
 738
 739         /* Set ADC debounce time */
 740         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
 741
 742         /* Detect accessory on boot */
 743         max77693_muic_detect_accessory(info);
 744
 745         return ret;
 746
 747 err_extcon:
 748         kfree(info->edev);
 749 err_irq:
 750 err_regmap:
 751         kfree(info);
 752 err_kfree:
 753         return ret;
 754 }
 755
 756 static int __devexit max77693_muic_remove(struct platform_device *pdev)
 757 {
 758         struct max77693_muic_info *info = platform_get_drvdata(pdev);
 759         int i;
 760
 761         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 762                 free_irq(muic_irqs[i].virq, info);
 763         cancel_work_sync(&info->irq_work);
 764         extcon_dev_unregister(info->edev);
 765         kfree(info);
 766
 767         return 0;
 768 }
 769
 770 static struct platform_driver max77693_muic_driver = {
 771         .driver         = {
 772                 .name   = DEV_NAME,
 773                 .owner  = THIS_MODULE,
 774         },
 775         .probe          = max77693_muic_probe,
 776         .remove         = __devexit_p(max77693_muic_remove),
 777 };
 778
 779 module_platform_driver(max77693_muic_driver);
 780
 781 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
 782 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 783 MODULE_LICENSE("GPL");
 784 MODULE_ALIAS("platform:extcon-max77693");