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