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;
 243
 244         switch (time) {
 245         case ADC_DEBOUNCE_TIME_5MS:
 246         case ADC_DEBOUNCE_TIME_10MS:
 247         case ADC_DEBOUNCE_TIME_25MS:
 248         case ADC_DEBOUNCE_TIME_38_62MS:
 249                 ret = max77693_update_reg(info->max77693->regmap_muic,
 250                                           MAX77693_MUIC_REG_CTRL3,
 251                                           time << CONTROL3_ADCDBSET_SHIFT,
 252                                           CONTROL3_ADCDBSET_MASK);
 253                 if (ret)
 254                         dev_err(info->dev, "failed to set ADC debounce time\n");
 255                 break;
 256         default:
 257                 dev_err(info->dev, "invalid ADC debounce time\n");
 258                 ret = -EINVAL;
 259                 break;
 260         }
 261
 262         return ret;
 263 };
 264
 265 static int max77693_muic_set_path(struct max77693_muic_info *info,
 266                 u8 val, bool attached)
 267 {
 268         int ret = 0;
 269         u8 ctrl1, ctrl2 = 0;
 270
 271         if (attached)
 272                 ctrl1 = val;
 273         else
 274                 ctrl1 = CONTROL1_SW_OPEN;
 275
 276         ret = max77693_update_reg(info->max77693->regmap_muic,
 277                         MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK);
 278         if (ret < 0) {
 279                 dev_err(info->dev, "failed to update MUIC register\n");
 280                 goto out;
 281         }
 282
 283         if (attached)
 284                 ctrl2 |= CONTROL2_CPEN_MASK;    /* LowPwr=0, CPEn=1 */
 285         else
 286                 ctrl2 |= CONTROL2_LOWPWR_MASK;  /* LowPwr=1, CPEn=0 */
 287
 288         ret = max77693_update_reg(info->max77693->regmap_muic,
 289                         MAX77693_MUIC_REG_CTRL2, ctrl2,
 290                         CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK);
 291         if (ret < 0) {
 292                 dev_err(info->dev, "failed to update MUIC register\n");
 293                 goto out;
 294         }
 295
 296         dev_info(info->dev,
 297                 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
 298                 ctrl1, ctrl2, attached ? "attached" : "detached");
 299 out:
 300         return ret;
 301 }
 302
 303 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info,
 304                 bool attached)
 305 {
 306         int ret = 0;
 307         int type;
 308         int adc, adc1k, adclow;
 309
 310         if (attached) {
 311                 adc = info->status[0] & STATUS1_ADC_MASK;
 312                 adclow = info->status[0] & STATUS1_ADCLOW_MASK;
 313                 adclow >>= STATUS1_ADCLOW_SHIFT;
 314                 adc1k = info->status[0] & STATUS1_ADC1K_MASK;
 315                 adc1k >>= STATUS1_ADC1K_SHIFT;
 316
 317                 /**
 318                  * [0x1][ADCLow][ADC1K]
 319                  * [0x1    0       0  ] : USB_OTG
 320                  * [0x1    1       0  ] : Audio Video Cable with load
 321                  * [0x1    1       1  ] : MHL
 322                  */
 323                 type = ((0x1 << 8) | (adclow << 1) | adc1k);
 324
 325                 /* Store previous ADC value to handle accessory
 326                    when accessory will be detached */
 327                 info->prev_adc = adc;
 328                 info->prev_adc_gnd = type;
 329         } else
 330                 type = info->prev_adc_gnd;
 331
 332         switch (type) {
 333         case MAX77693_MUIC_GND_USB_OTG:
 334                 /* USB_OTG */
 335                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 336                 if (ret < 0)
 337                         goto out;
 338                 extcon_set_cable_state(info->edev, "USB-Host", attached);
 339                 break;
 340         case MAX77693_MUIC_GND_AV_CABLE_LOAD:
 341                 /* Audio Video Cable with load */
 342                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 343                 if (ret < 0)
 344                         goto out;
 345                 extcon_set_cable_state(info->edev,
 346                                 "Audio-video-load", attached);
 347                 break;
 348         case MAX77693_MUIC_GND_MHL_CABLE:
 349                 /* MHL */
 350                 extcon_set_cable_state(info->edev, "MHL", attached);
 351                 break;
 352         default:
 353                 dev_err(info->dev, "failed to detect %s accessory\n",
 354                         attached ? "attached" : "detached");
 355                 dev_err(info->dev, "- adc:0x%x, adclow:0x%x, adc1k:0x%x\n",
 356                         adc, adclow, adc1k);
 357                 ret = -EINVAL;
 358                 break;
 359         }
 360
 361 out:
 362         return ret;
 363 }
 364
 365 static int max77693_muic_adc_handler(struct max77693_muic_info *info,
 366                 int curr_adc, bool attached)
 367 {
 368         int ret = 0;
 369         int adc;
 370
 371         if (attached) {
 372                 /* Store ADC value to handle accessory
 373                    when accessory will be detached */
 374                 info->prev_adc = curr_adc;
 375                 adc = curr_adc;
 376         } else
 377                 adc = info->prev_adc;
 378
 379         dev_info(info->dev,
 380                 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
 381                 attached ? "attached" : "detached", curr_adc, info->prev_adc);
 382
 383         switch (adc) {
 384         case MAX77693_MUIC_ADC_GROUND:
 385                 /* USB_OTG/MHL/Audio */
 386                 max77693_muic_adc_ground_handler(info, attached);
 387                 break;
 388         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
 389         case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
 390                 /* USB */
 391                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 392                 if (ret < 0)
 393                         goto out;
 394                 extcon_set_cable_state(info->edev, "USB", attached);
 395                 break;
 396         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
 397         case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
 398                 /* JIG */
 399                 ret = max77693_muic_set_path(info, CONTROL1_SW_UART, attached);
 400                 if (ret < 0)
 401                         goto out;
 402                 extcon_set_cable_state(info->edev, "JIG", attached);
 403                 break;
 404         case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE:
 405                 /* Audio Video cable with no-load */
 406                 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
 407                 if (ret < 0)
 408                         goto out;
 409                 extcon_set_cable_state(info->edev,
 410                                 "Audio-video-noload", attached);
 411                 break;
 412         case MAX77693_MUIC_ADC_SEND_END_BUTTON:
 413         case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
 414         case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
 415         case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON:
 416         case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
 417         case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
 418         case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
 419         case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON:
 420         case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
 421         case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
 422         case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
 423         case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
 424         case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON:
 425         case MAX77693_MUIC_ADC_RESERVED_ACC_1:
 426         case MAX77693_MUIC_ADC_RESERVED_ACC_2:
 427         case MAX77693_MUIC_ADC_RESERVED_ACC_3:
 428         case MAX77693_MUIC_ADC_RESERVED_ACC_4:
 429         case MAX77693_MUIC_ADC_RESERVED_ACC_5:
 430         case MAX77693_MUIC_ADC_CEA936_AUDIO:
 431         case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
 432         case MAX77693_MUIC_ADC_TTY_CONVERTER:
 433         case MAX77693_MUIC_ADC_UART_CABLE:
 434         case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
 435         case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD:
 436         case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
 437                 /* This accessory isn't used in general case if it is specially
 438                    needed to detect additional accessory, should implement
 439                    proper operation when this accessory is attached/detached. */
 440                 dev_info(info->dev,
 441                         "accessory is %s but it isn't used (adc:0x%x)\n",
 442                         attached ? "attached" : "detached", adc);
 443                 goto out;
 444         default:
 445                 dev_err(info->dev,
 446                         "failed to detect %s accessory (adc:0x%x)\n",
 447                         attached ? "attached" : "detached", adc);
 448                 ret = -EINVAL;
 449                 goto out;
 450         }
 451
 452 out:
 453         return ret;
 454 }
 455
 456 static int max77693_muic_chg_handler(struct max77693_muic_info *info,
 457                 int curr_chg_type, bool attached)
 458 {
 459         int ret = 0;
 460         int chg_type;
 461
 462         if (attached) {
 463                 /* Store previous charger type to control
 464                    when charger accessory will be detached */
 465                 info->prev_chg_type = curr_chg_type;
 466                 chg_type = curr_chg_type;
 467         } else
 468                 chg_type = info->prev_chg_type;
 469
 470         dev_info(info->dev,
 471                 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
 472                         attached ? "attached" : "detached",
 473                         curr_chg_type, info->prev_chg_type);
 474
 475         switch (chg_type) {
 476         case MAX77693_CHARGER_TYPE_USB:
 477                 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached);
 478                 if (ret < 0)
 479                         goto out;
 480                 extcon_set_cable_state(info->edev, "USB", attached);
 481                 break;
 482         case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
 483                 extcon_set_cable_state(info->edev,
 484                                 "Charge-downstream", attached);
 485                 break;
 486         case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
 487                 extcon_set_cable_state(info->edev, "TA", attached);
 488                 break;
 489         case MAX77693_CHARGER_TYPE_APPLE_500MA:
 490                 extcon_set_cable_state(info->edev, "Slow-charger", attached);
 491                 break;
 492         case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
 493                 extcon_set_cable_state(info->edev, "Fast-charger", attached);
 494                 break;
 495         case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
 496                 break;
 497         default:
 498                 dev_err(info->dev,
 499                         "failed to detect %s accessory (chg_type:0x%x)\n",
 500                         attached ? "attached" : "detached", chg_type);
 501                 ret = -EINVAL;
 502                 goto out;
 503         }
 504
 505 out:
 506         return ret;
 507 }
 508
 509 static void max77693_muic_irq_work(struct work_struct *work)
 510 {
 511         struct max77693_muic_info *info = container_of(work,
 512                         struct max77693_muic_info, irq_work);
 513         int curr_adc, curr_chg_type;
 514         int irq_type = -1;
 515         int i, ret = 0;
 516         bool attached = true;
 517
 518         if (!info->edev)
 519                 return;
 520
 521         mutex_lock(&info->mutex);
 522
 523         for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++)
 524                 if (info->irq == muic_irqs[i].virq)
 525                         irq_type = muic_irqs[i].irq;
 526
 527         ret = max77693_bulk_read(info->max77693->regmap_muic,
 528                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
 529         if (ret) {
 530                 dev_err(info->dev, "failed to read MUIC register\n");
 531                 mutex_unlock(&info->mutex);
 532                 return;
 533         }
 534
 535         switch (irq_type) {
 536         case MAX77693_MUIC_IRQ_INT1_ADC:
 537         case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
 538         case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
 539         case MAX77693_MUIC_IRQ_INT1_ADC1K:
 540                 /* Handle all of accessory except for
 541                    type of charger accessory */
 542                 curr_adc = info->status[0] & STATUS1_ADC_MASK;
 543                 curr_adc >>= STATUS1_ADC_SHIFT;
 544
 545                 /* Check accessory state which is either detached or attached */
 546                 if (curr_adc == MAX77693_MUIC_ADC_OPEN)
 547                         attached = false;
 548
 549                 ret = max77693_muic_adc_handler(info, curr_adc, attached);
 550                 break;
 551         case MAX77693_MUIC_IRQ_INT2_CHGTYP:
 552         case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
 553         case MAX77693_MUIC_IRQ_INT2_DCDTMR:
 554         case MAX77693_MUIC_IRQ_INT2_DXOVP:
 555         case MAX77693_MUIC_IRQ_INT2_VBVOLT:
 556         case MAX77693_MUIC_IRQ_INT2_VIDRM:
 557                 /* Handle charger accessory */
 558                 curr_chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 559                 curr_chg_type >>= STATUS2_CHGTYP_SHIFT;
 560
 561                 /* Check charger accessory state which
 562                    is either detached or attached */
 563                 if (curr_chg_type == MAX77693_CHARGER_TYPE_NONE)
 564                         attached = false;
 565
 566                 ret = max77693_muic_chg_handler(info, curr_chg_type, attached);
 567                 break;
 568         case MAX77693_MUIC_IRQ_INT3_EOC:
 569         case MAX77693_MUIC_IRQ_INT3_CGMBC:
 570         case MAX77693_MUIC_IRQ_INT3_OVP:
 571         case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
 572         case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
 573         case MAX77693_MUIC_IRQ_INT3_BAT_DET:
 574                 break;
 575         default:
 576                 dev_err(info->dev, "muic interrupt: irq %d occurred\n",
 577                                 irq_type);
 578                 break;
 579         }
 580
 581         if (ret < 0)
 582                 dev_err(info->dev, "failed to handle MUIC interrupt\n");
 583
 584         mutex_unlock(&info->mutex);
 585
 586         return;
 587 }
 588
 589 static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
 590 {
 591         struct max77693_muic_info *info = data;
 592
 593         info->irq = irq;
 594         schedule_work(&info->irq_work);
 595
 596         return IRQ_HANDLED;
 597 }
 598
 599 static struct regmap_config max77693_muic_regmap_config = {
 600         .reg_bits = 8,
 601         .val_bits = 8,
 602 };
 603
 604 static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
 605 {
 606         int ret = 0;
 607         int adc, chg_type;
 608
 609         mutex_lock(&info->mutex);
 610
 611         /* Read STATUSx register to detect accessory */
 612         ret = max77693_bulk_read(info->max77693->regmap_muic,
 613                         MAX77693_MUIC_REG_STATUS1, 2, info->status);
 614         if (ret) {
 615                 dev_err(info->dev, "failed to read MUIC register\n");
 616                 mutex_unlock(&info->mutex);
 617                 return -EINVAL;
 618         }
 619
 620         adc = info->status[0] & STATUS1_ADC_MASK;
 621         adc >>= STATUS1_ADC_SHIFT;
 622
 623         if (adc != MAX77693_MUIC_ADC_OPEN) {
 624                 dev_info(info->dev,
 625                         "external connector is attached (adc:0x%02x)\n", adc);
 626
 627                 ret = max77693_muic_adc_handler(info, adc, true);
 628                 if (ret < 0)
 629                         dev_err(info->dev, "failed to detect accessory\n");
 630                 goto out;
 631         }
 632
 633         chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
 634         chg_type >>= STATUS2_CHGTYP_SHIFT;
 635
 636         if (chg_type != MAX77693_CHARGER_TYPE_NONE) {
 637                 dev_info(info->dev,
 638                         "external connector is attached (chg_type:0x%x)\n",
 639                         chg_type);
 640
 641                 max77693_muic_chg_handler(info, chg_type, true);
 642                 if (ret < 0)
 643                         dev_err(info->dev, "failed to detect charger accessory\n");
 644         }
 645
 646 out:
 647         mutex_unlock(&info->mutex);
 648         return ret;
 649 }
 650
 651 static int max77693_muic_probe(struct platform_device *pdev)
 652 {
 653         struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
 654         struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
 655         struct max77693_muic_platform_data *muic_pdata = pdata->muic_data;
 656         struct max77693_muic_info *info;
 657         int ret, i;
 658         u8 id;
 659
 660         info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
 661                                    GFP_KERNEL);
 662         if (!info) {
 663                 dev_err(&pdev->dev, "failed to allocate memory\n");
 664                 return -ENOMEM;
 665         }
 666         info->dev = &pdev->dev;
 667         info->max77693 = max77693;
 668         if (info->max77693->regmap_muic) {
 669                 dev_dbg(&pdev->dev, "allocate register map\n");
 670         } else {
 671                 info->max77693->regmap_muic = devm_regmap_init_i2c(
 672                                                 info->max77693->muic,
 673                                                 &max77693_muic_regmap_config);
 674                 if (IS_ERR(info->max77693->regmap_muic)) {
 675                         ret = PTR_ERR(info->max77693->regmap_muic);
 676                         dev_err(max77693->dev,
 677                                 "failed to allocate register map: %d\n", ret);
 678                         return ret;
 679                 }
 680         }
 681         platform_set_drvdata(pdev, info);
 682         mutex_init(&info->mutex);
 683
 684         INIT_WORK(&info->irq_work, max77693_muic_irq_work);
 685
 686         /* Support irq domain for MAX77693 MUIC device */
 687         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
 688                 struct max77693_muic_irq *muic_irq = &muic_irqs[i];
 689                 unsigned int virq = 0;
 690
 691                 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq);
 692                 if (!virq) {
 693                         ret = -EINVAL;
 694                         goto err_irq;
 695                 }
 696                 muic_irq->virq = virq;
 697
 698                 ret = request_threaded_irq(virq, NULL,
 699                                 max77693_muic_irq_handler,
 700                                 IRQF_ONESHOT, muic_irq->name, info);
 701                 if (ret) {
 702                         dev_err(&pdev->dev,
 703                                 "failed: irq request (IRQ: %d,"
 704                                 " error :%d)\n",
 705                                 muic_irq->irq, ret);
 706
 707                         goto err_irq;
 708                 }
 709         }
 710
 711         /* Initialize extcon device */
 712         info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev),
 713                                   GFP_KERNEL);
 714         if (!info->edev) {
 715                 dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
 716                 ret = -ENOMEM;
 717                 goto err_irq;
 718         }
 719         info->edev->name = DEV_NAME;
 720         info->edev->supported_cable = max77693_extcon_cable;
 721         ret = extcon_dev_register(info->edev, NULL);
 722         if (ret) {
 723                 dev_err(&pdev->dev, "failed to register extcon device\n");
 724                 goto err_irq;
 725         }
 726
 727         /* Initialize MUIC register by using platform data */
 728         for (i = 0 ; i < muic_pdata->num_init_data ; i++) {
 729                 enum max77693_irq_source irq_src = MAX77693_IRQ_GROUP_NR;
 730
 731                 max77693_write_reg(info->max77693->regmap_muic,
 732                                 muic_pdata->init_data[i].addr,
 733                                 muic_pdata->init_data[i].data);
 734
 735                 switch (muic_pdata->init_data[i].addr) {
 736                 case MAX77693_MUIC_REG_INTMASK1:
 737                         irq_src = MUIC_INT1;
 738                         break;
 739                 case MAX77693_MUIC_REG_INTMASK2:
 740                         irq_src = MUIC_INT2;
 741                         break;
 742                 case MAX77693_MUIC_REG_INTMASK3:
 743                         irq_src = MUIC_INT3;
 744                         break;
 745                 }
 746
 747                 if (irq_src < MAX77693_IRQ_GROUP_NR)
 748                         info->max77693->irq_masks_cur[irq_src]
 749                                 = muic_pdata->init_data[i].data;
 750         }
 751
 752         /* Check revision number of MUIC device*/
 753         ret = max77693_read_reg(info->max77693->regmap_muic,
 754                         MAX77693_MUIC_REG_ID, &id);
 755         if (ret < 0) {
 756                 dev_err(&pdev->dev, "failed to read revision number\n");
 757                 goto err_irq;
 758         }
 759         dev_info(info->dev, "device ID : 0x%x\n", id);
 760
 761         /* Set ADC debounce time */
 762         max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
 763
 764         /* Detect accessory on boot */
 765         max77693_muic_detect_accessory(info);
 766
 767         return ret;
 768
 769 err_irq:
 770         while (--i >= 0)
 771                 free_irq(muic_irqs[i].virq, info);
 772         return ret;
 773 }
 774
 775 static int max77693_muic_remove(struct platform_device *pdev)
 776 {
 777         struct max77693_muic_info *info = platform_get_drvdata(pdev);
 778         int i;
 779
 780         for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
 781                 free_irq(muic_irqs[i].virq, info);
 782         cancel_work_sync(&info->irq_work);
 783         extcon_dev_unregister(info->edev);
 784
 785         return 0;
 786 }
 787
 788 static struct platform_driver max77693_muic_driver = {
 789         .driver         = {
 790                 .name   = DEV_NAME,
 791                 .owner  = THIS_MODULE,
 792         },
 793         .probe          = max77693_muic_probe,
 794         .remove         = max77693_muic_remove,
 795 };
 796
 797 module_platform_driver(max77693_muic_driver);
 798
 799 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
 800 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
 801 MODULE_LICENSE("GPL");
 802 MODULE_ALIAS("platform:extcon-max77693");