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