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-provider.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 /* 192 * The below accessories have same ADC value so ADCLow and 193 * ADC1K bit is used to separate specific accessory. 194 */ 195 /* ADC|VBVolot|ADCLow|ADC1K| */ 196 MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */ 197 MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */ 198 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ 199 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ 200 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */ 201 }; 202 203 /* 204 * MAX77693 MUIC device support below list of accessories(external connector) 205 */ 206 static const unsigned int max77693_extcon_cable[] = { 207 EXTCON_USB, 208 EXTCON_USB_HOST, 209 EXTCON_CHG_USB_SDP, 210 EXTCON_CHG_USB_DCP, 211 EXTCON_CHG_USB_FAST, 212 EXTCON_CHG_USB_SLOW, 213 EXTCON_CHG_USB_CDP, 214 EXTCON_DISP_MHL, 215 EXTCON_JIG, 216 EXTCON_DOCK, 217 EXTCON_NONE, 218 }; 219 220 /* 221 * max77693_muic_set_debounce_time - Set the debounce time of ADC 222 * @info: the instance including private data of max77693 MUIC 223 * @time: the debounce time of ADC 224 */ 225 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, 226 enum max77693_muic_adc_debounce_time time) 227 { 228 int ret; 229 230 switch (time) { 231 case ADC_DEBOUNCE_TIME_5MS: 232 case ADC_DEBOUNCE_TIME_10MS: 233 case ADC_DEBOUNCE_TIME_25MS: 234 case ADC_DEBOUNCE_TIME_38_62MS: 235 /* 236 * Don't touch BTLDset, JIGset when you want to change adc 237 * debounce time. If it writes other than 0 to BTLDset, JIGset 238 * muic device will be reset and loose current state. 239 */ 240 ret = regmap_write(info->max77693->regmap_muic, 241 MAX77693_MUIC_REG_CTRL3, 242 time << MAX77693_CONTROL3_ADCDBSET_SHIFT); 243 if (ret) { 244 dev_err(info->dev, "failed to set ADC debounce time\n"); 245 return ret; 246 } 247 break; 248 default: 249 dev_err(info->dev, "invalid ADC debounce time\n"); 250 return -EINVAL; 251 } 252 253 return 0; 254 }; 255 256 /* 257 * max77693_muic_set_path - Set hardware line according to attached cable 258 * @info: the instance including private data of max77693 MUIC 259 * @value: the path according to attached cable 260 * @attached: the state of cable (true:attached, false:detached) 261 * 262 * The max77693 MUIC device share outside H/W line among a varity of cables 263 * so, this function set internal path of H/W line according to the type of 264 * attached cable. 265 */ 266 static int max77693_muic_set_path(struct max77693_muic_info *info, 267 u8 val, bool attached) 268 { 269 int ret; 270 unsigned int ctrl1, ctrl2 = 0; 271 272 if (attached) 273 ctrl1 = val; 274 else 275 ctrl1 = MAX77693_CONTROL1_SW_OPEN; 276 277 ret = regmap_update_bits(info->max77693->regmap_muic, 278 MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1); 279 if (ret < 0) { 280 dev_err(info->dev, "failed to update MUIC register\n"); 281 return ret; 282 } 283 284 if (attached) 285 ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ 286 else 287 ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ 288 289 ret = regmap_update_bits(info->max77693->regmap_muic, 290 MAX77693_MUIC_REG_CTRL2, 291 MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK, 292 ctrl2); 293 if (ret < 0) { 294 dev_err(info->dev, "failed to update MUIC register\n"); 295 return ret; 296 } 297 298 dev_info(info->dev, 299 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 300 ctrl1, ctrl2, attached ? "attached" : "detached"); 301 302 return 0; 303 } 304 305 /* 306 * max77693_muic_get_cable_type - Return cable type and check cable state 307 * @info: the instance including private data of max77693 MUIC 308 * @group: the path according to attached cable 309 * @attached: store cable state and return 310 * 311 * This function check the cable state either attached or detached, 312 * and then divide precise type of cable according to cable group. 313 * - MAX77693_CABLE_GROUP_ADC 314 * - MAX77693_CABLE_GROUP_ADC_GND 315 * - MAX77693_CABLE_GROUP_CHG 316 * - MAX77693_CABLE_GROUP_VBVOLT 317 */ 318 static int max77693_muic_get_cable_type(struct max77693_muic_info *info, 319 enum max77693_muic_cable_group group, bool *attached) 320 { 321 int cable_type = 0; 322 int adc; 323 int adc1k; 324 int adclow; 325 int vbvolt; 326 int chg_type; 327 328 switch (group) { 329 case MAX77693_CABLE_GROUP_ADC: 330 /* 331 * Read ADC value to check cable type and decide cable state 332 * according to cable type 333 */ 334 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; 335 adc >>= MAX77693_STATUS1_ADC_SHIFT; 336 337 /* 338 * Check current cable state/cable type and store cable type 339 * (info->prev_cable_type) for handling cable when cable is 340 * detached. 341 */ 342 if (adc == MAX77693_MUIC_ADC_OPEN) { 343 *attached = false; 344 345 cable_type = info->prev_cable_type; 346 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN; 347 } else { 348 *attached = true; 349 350 cable_type = info->prev_cable_type = adc; 351 } 352 break; 353 case MAX77693_CABLE_GROUP_ADC_GND: 354 /* 355 * Read ADC value to check cable type and decide cable state 356 * according to cable type 357 */ 358 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; 359 adc >>= MAX77693_STATUS1_ADC_SHIFT; 360 361 /* 362 * Check current cable state/cable type and store cable type 363 * (info->prev_cable_type/_gnd) for handling cable when cable 364 * is detached. 365 */ 366 if (adc == MAX77693_MUIC_ADC_OPEN) { 367 *attached = false; 368 369 cable_type = info->prev_cable_type_gnd; 370 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; 371 } else { 372 *attached = true; 373 374 adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK; 375 adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT; 376 adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK; 377 adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT; 378 379 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; 380 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; 381 382 /** 383 * [0x1|VBVolt|ADCLow|ADC1K] 384 * [0x1| 0| 0| 0] USB_HOST 385 * [0x1| 1| 0| 0] USB_HSOT_VB 386 * [0x1| 0| 1| 0] Audio Video cable with load 387 * [0x1| 0| 1| 1] MHL without charging cable 388 * [0x1| 1| 1| 1] MHL with charging cable 389 */ 390 cable_type = ((0x1 << 8) 391 | (vbvolt << 2) 392 | (adclow << 1) 393 | adc1k); 394 395 info->prev_cable_type = adc; 396 info->prev_cable_type_gnd = cable_type; 397 } 398 399 break; 400 case MAX77693_CABLE_GROUP_CHG: 401 /* 402 * Read charger type to check cable type and decide cable state 403 * according to type of charger cable. 404 */ 405 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; 406 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; 407 408 if (chg_type == MAX77693_CHARGER_TYPE_NONE) { 409 *attached = false; 410 411 cable_type = info->prev_chg_type; 412 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; 413 } else { 414 *attached = true; 415 416 /* 417 * Check current cable state/cable type and store cable 418 * type(info->prev_chg_type) for handling cable when 419 * charger cable is detached. 420 */ 421 cable_type = info->prev_chg_type = chg_type; 422 } 423 424 break; 425 case MAX77693_CABLE_GROUP_VBVOLT: 426 /* 427 * Read ADC value to check cable type and decide cable state 428 * according to cable type 429 */ 430 adc = info->status[0] & MAX77693_STATUS1_ADC_MASK; 431 adc >>= MAX77693_STATUS1_ADC_SHIFT; 432 chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK; 433 chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT; 434 435 if (adc == MAX77693_MUIC_ADC_OPEN 436 && chg_type == MAX77693_CHARGER_TYPE_NONE) 437 *attached = false; 438 else 439 *attached = true; 440 441 /* 442 * Read vbvolt field, if vbvolt is 1, 443 * this cable is used for charging. 444 */ 445 vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK; 446 vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT; 447 448 cable_type = vbvolt; 449 break; 450 default: 451 dev_err(info->dev, "Unknown cable group (%d)\n", group); 452 cable_type = -EINVAL; 453 break; 454 } 455 456 return cable_type; 457 } 458 459 static int max77693_muic_dock_handler(struct max77693_muic_info *info, 460 int cable_type, bool attached) 461 { 462 int ret = 0; 463 int vbvolt; 464 bool cable_attached; 465 unsigned int dock_id; 466 467 dev_info(info->dev, 468 "external connector is %s (adc:0x%02x)\n", 469 attached ? "attached" : "detached", cable_type); 470 471 switch (cable_type) { 472 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ 473 /* 474 * Check power cable whether attached or detached state. 475 * The Dock-Smart device need surely external power supply. 476 * If power cable(USB/TA) isn't connected to Dock device, 477 * user can't use Dock-Smart for desktop mode. 478 */ 479 vbvolt = max77693_muic_get_cable_type(info, 480 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached); 481 if (attached && !vbvolt) { 482 dev_warn(info->dev, 483 "Cannot detect external power supply\n"); 484 return 0; 485 } 486 487 /* 488 * Notify Dock/MHL state. 489 * - Dock device include three type of cable which 490 * are HDMI, USB for mouse/keyboard and micro-usb port 491 * for USB/TA cable. Dock device need always exteranl 492 * power supply(USB/TA cable through micro-usb cable). Dock 493 * device support screen output of target to separate 494 * monitor and mouse/keyboard for desktop mode. 495 * 496 * Features of 'USB/TA cable with Dock device' 497 * - Support MHL 498 * - Support external output feature of audio 499 * - Support charging through micro-usb port without data 500 * connection if TA cable is connected to target. 501 * - Support charging and data connection through micro-usb port 502 * if USB cable is connected between target and host 503 * device. 504 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) 505 */ 506 ret = max77693_muic_set_path(info, info->path_usb, attached); 507 if (ret < 0) 508 return ret; 509 510 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); 511 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); 512 goto out; 513 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ 514 dock_id = EXTCON_DOCK; 515 break; 516 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ 517 dock_id = EXTCON_DOCK; 518 if (!attached) { 519 extcon_set_state_sync(info->edev, EXTCON_USB, false); 520 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 521 false); 522 } 523 break; 524 default: 525 dev_err(info->dev, "failed to detect %s dock device\n", 526 attached ? "attached" : "detached"); 527 return -EINVAL; 528 } 529 530 /* Dock-Car/Desk/Audio, PATH:AUDIO */ 531 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, 532 attached); 533 if (ret < 0) 534 return ret; 535 extcon_set_state_sync(info->edev, dock_id, attached); 536 537 out: 538 return 0; 539 } 540 541 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info, 542 int button_type, bool attached) 543 { 544 struct input_dev *dock = info->dock; 545 unsigned int code; 546 547 switch (button_type) { 548 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1 549 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1: 550 /* DOCK_KEY_PREV */ 551 code = KEY_PREVIOUSSONG; 552 break; 553 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1 554 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1: 555 /* DOCK_KEY_NEXT */ 556 code = KEY_NEXTSONG; 557 break; 558 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: 559 /* DOCK_VOL_DOWN */ 560 code = KEY_VOLUMEDOWN; 561 break; 562 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: 563 /* DOCK_VOL_UP */ 564 code = KEY_VOLUMEUP; 565 break; 566 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1 567 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1: 568 /* DOCK_KEY_PLAY_PAUSE */ 569 code = KEY_PLAYPAUSE; 570 break; 571 default: 572 dev_err(info->dev, 573 "failed to detect %s key (adc:0x%x)\n", 574 attached ? "pressed" : "released", button_type); 575 return -EINVAL; 576 } 577 578 input_event(dock, EV_KEY, code, attached); 579 input_sync(dock); 580 581 return 0; 582 } 583 584 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) 585 { 586 int cable_type_gnd; 587 int ret = 0; 588 bool attached; 589 590 cable_type_gnd = max77693_muic_get_cable_type(info, 591 MAX77693_CABLE_GROUP_ADC_GND, &attached); 592 593 switch (cable_type_gnd) { 594 case MAX77693_MUIC_GND_USB_HOST: 595 case MAX77693_MUIC_GND_USB_HOST_VB: 596 /* USB_HOST, PATH: AP_USB */ 597 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB, 598 attached); 599 if (ret < 0) 600 return ret; 601 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); 602 break; 603 case MAX77693_MUIC_GND_AV_CABLE_LOAD: 604 /* Audio Video Cable with load, PATH:AUDIO */ 605 ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO, 606 attached); 607 if (ret < 0) 608 return ret; 609 extcon_set_state_sync(info->edev, EXTCON_USB, attached); 610 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 611 attached); 612 break; 613 case MAX77693_MUIC_GND_MHL: 614 case MAX77693_MUIC_GND_MHL_VB: 615 /* MHL or MHL with USB/TA cable */ 616 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); 617 break; 618 default: 619 dev_err(info->dev, "failed to detect %s cable of gnd type\n", 620 attached ? "attached" : "detached"); 621 return -EINVAL; 622 } 623 624 return 0; 625 } 626 627 static int max77693_muic_jig_handler(struct max77693_muic_info *info, 628 int cable_type, bool attached) 629 { 630 int ret = 0; 631 u8 path = MAX77693_CONTROL1_SW_OPEN; 632 633 dev_info(info->dev, 634 "external connector is %s (adc:0x%02x)\n", 635 attached ? "attached" : "detached", cable_type); 636 637 switch (cable_type) { 638 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ 639 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ 640 /* PATH:AP_USB */ 641 path = MAX77693_CONTROL1_SW_USB; 642 break; 643 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ 644 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */ 645 /* PATH:AP_UART */ 646 path = MAX77693_CONTROL1_SW_UART; 647 break; 648 default: 649 dev_err(info->dev, "failed to detect %s jig cable\n", 650 attached ? "attached" : "detached"); 651 return -EINVAL; 652 } 653 654 ret = max77693_muic_set_path(info, path, attached); 655 if (ret < 0) 656 return ret; 657 658 extcon_set_state_sync(info->edev, EXTCON_JIG, attached); 659 660 return 0; 661 } 662 663 static int max77693_muic_adc_handler(struct max77693_muic_info *info) 664 { 665 int cable_type; 666 int button_type; 667 bool attached; 668 int ret = 0; 669 670 /* Check accessory state which is either detached or attached */ 671 cable_type = max77693_muic_get_cable_type(info, 672 MAX77693_CABLE_GROUP_ADC, &attached); 673 674 dev_info(info->dev, 675 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 676 attached ? "attached" : "detached", cable_type, 677 info->prev_cable_type); 678 679 switch (cable_type) { 680 case MAX77693_MUIC_ADC_GROUND: 681 /* USB_HOST/MHL/Audio */ 682 max77693_muic_adc_ground_handler(info); 683 break; 684 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: 685 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: 686 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: 687 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: 688 /* JIG */ 689 ret = max77693_muic_jig_handler(info, cable_type, attached); 690 if (ret < 0) 691 return ret; 692 break; 693 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ 694 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ 695 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ 696 /* 697 * DOCK device 698 * 699 * The MAX77693 MUIC device can detect total 34 cable type 700 * except of charger cable and MUIC device didn't define 701 * specfic role of cable in the range of from 0x01 to 0x12 702 * of ADC value. So, can use/define cable with no role according 703 * to schema of hardware board. 704 */ 705 ret = max77693_muic_dock_handler(info, cable_type, attached); 706 if (ret < 0) 707 return ret; 708 break; 709 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */ 710 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */ 711 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */ 712 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */ 713 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */ 714 /* 715 * Button of DOCK device 716 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button 717 * 718 * The MAX77693 MUIC device can detect total 34 cable type 719 * except of charger cable and MUIC device didn't define 720 * specfic role of cable in the range of from 0x01 to 0x12 721 * of ADC value. So, can use/define cable with no role according 722 * to schema of hardware board. 723 */ 724 if (attached) 725 button_type = info->prev_button_type = cable_type; 726 else 727 button_type = info->prev_button_type; 728 729 ret = max77693_muic_dock_button_handler(info, button_type, 730 attached); 731 if (ret < 0) 732 return ret; 733 break; 734 case MAX77693_MUIC_ADC_SEND_END_BUTTON: 735 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: 736 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: 737 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: 738 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: 739 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: 740 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: 741 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: 742 case MAX77693_MUIC_ADC_RESERVED_ACC_1: 743 case MAX77693_MUIC_ADC_RESERVED_ACC_2: 744 case MAX77693_MUIC_ADC_RESERVED_ACC_4: 745 case MAX77693_MUIC_ADC_RESERVED_ACC_5: 746 case MAX77693_MUIC_ADC_CEA936_AUDIO: 747 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: 748 case MAX77693_MUIC_ADC_TTY_CONVERTER: 749 case MAX77693_MUIC_ADC_UART_CABLE: 750 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: 751 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: 752 /* 753 * This accessory isn't used in general case if it is specially 754 * needed to detect additional accessory, should implement 755 * proper operation when this accessory is attached/detached. 756 */ 757 dev_info(info->dev, 758 "accessory is %s but it isn't used (adc:0x%x)\n", 759 attached ? "attached" : "detached", cable_type); 760 return -EAGAIN; 761 default: 762 dev_err(info->dev, 763 "failed to detect %s accessory (adc:0x%x)\n", 764 attached ? "attached" : "detached", cable_type); 765 return -EINVAL; 766 } 767 768 return 0; 769 } 770 771 static int max77693_muic_chg_handler(struct max77693_muic_info *info) 772 { 773 int chg_type; 774 int cable_type_gnd; 775 int cable_type; 776 bool attached; 777 bool cable_attached; 778 int ret = 0; 779 780 chg_type = max77693_muic_get_cable_type(info, 781 MAX77693_CABLE_GROUP_CHG, &attached); 782 783 dev_info(info->dev, 784 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 785 attached ? "attached" : "detached", 786 chg_type, info->prev_chg_type); 787 788 switch (chg_type) { 789 case MAX77693_CHARGER_TYPE_USB: 790 case MAX77693_CHARGER_TYPE_DEDICATED_CHG: 791 case MAX77693_CHARGER_TYPE_NONE: 792 /* Check MAX77693_CABLE_GROUP_ADC_GND type */ 793 cable_type_gnd = max77693_muic_get_cable_type(info, 794 MAX77693_CABLE_GROUP_ADC_GND, 795 &cable_attached); 796 switch (cable_type_gnd) { 797 case MAX77693_MUIC_GND_MHL: 798 case MAX77693_MUIC_GND_MHL_VB: 799 /* 800 * MHL cable with USB/TA cable 801 * - MHL cable include two port(HDMI line and separate 802 * micro-usb port. When the target connect MHL cable, 803 * extcon driver check whether USB/TA cable is 804 * connected. If USB/TA cable is connected, extcon 805 * driver notify state to notifiee for charging battery. 806 * 807 * Features of 'USB/TA with MHL cable' 808 * - Support MHL 809 * - Support charging through micro-usb port without 810 * data connection 811 */ 812 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 813 attached); 814 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, 815 cable_attached); 816 break; 817 } 818 819 /* Check MAX77693_CABLE_GROUP_ADC type */ 820 cable_type = max77693_muic_get_cable_type(info, 821 MAX77693_CABLE_GROUP_ADC, 822 &cable_attached); 823 switch (cable_type) { 824 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ 825 /* 826 * Dock-Audio device with USB/TA cable 827 * - Dock device include two port(Dock-Audio and micro- 828 * usb port). When the target connect Dock-Audio device, 829 * extcon driver check whether USB/TA cable is connected 830 * or not. If USB/TA cable is connected, extcon driver 831 * notify state to notifiee for charging battery. 832 * 833 * Features of 'USB/TA cable with Dock-Audio device' 834 * - Support external output feature of audio. 835 * - Support charging through micro-usb port without 836 * data connection. 837 */ 838 extcon_set_state_sync(info->edev, EXTCON_USB, 839 attached); 840 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 841 attached); 842 843 if (!cable_attached) 844 extcon_set_state_sync(info->edev, EXTCON_DOCK, 845 cable_attached); 846 break; 847 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ 848 /* 849 * Dock-Smart device with USB/TA cable 850 * - Dock-Desk device include three type of cable which 851 * are HDMI, USB for mouse/keyboard and micro-usb port 852 * for USB/TA cable. Dock-Smart device need always 853 * exteranl power supply(USB/TA cable through micro-usb 854 * cable). Dock-Smart device support screen output of 855 * target to separate monitor and mouse/keyboard for 856 * desktop mode. 857 * 858 * Features of 'USB/TA cable with Dock-Smart device' 859 * - Support MHL 860 * - Support external output feature of audio 861 * - Support charging through micro-usb port without 862 * data connection if TA cable is connected to target. 863 * - Support charging and data connection through micro- 864 * usb port if USB cable is connected between target 865 * and host device 866 * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard) 867 */ 868 ret = max77693_muic_set_path(info, info->path_usb, 869 attached); 870 if (ret < 0) 871 return ret; 872 873 extcon_set_state_sync(info->edev, EXTCON_DOCK, 874 attached); 875 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, 876 attached); 877 break; 878 } 879 880 /* Check MAX77693_CABLE_GROUP_CHG type */ 881 switch (chg_type) { 882 case MAX77693_CHARGER_TYPE_NONE: 883 /* 884 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA 885 * cable is attached, muic device happen below two irq. 886 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting 887 * MHL/Dock-Audio. 888 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting 889 * USB/TA cable connected to MHL or Dock-Audio. 890 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC 891 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq. 892 * 893 * If user attach MHL (with USB/TA cable and immediately 894 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ 895 * _INT2_CHGTYP irq is happened, USB/TA cable remain 896 * connected state to target. But USB/TA cable isn't 897 * connected to target. The user be face with unusual 898 * action. So, driver should check this situation in 899 * spite of, that previous charger type is N/A. 900 */ 901 break; 902 case MAX77693_CHARGER_TYPE_USB: 903 /* Only USB cable, PATH:AP_USB */ 904 ret = max77693_muic_set_path(info, info->path_usb, 905 attached); 906 if (ret < 0) 907 return ret; 908 909 extcon_set_state_sync(info->edev, EXTCON_USB, 910 attached); 911 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 912 attached); 913 break; 914 case MAX77693_CHARGER_TYPE_DEDICATED_CHG: 915 /* Only TA cable */ 916 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 917 attached); 918 break; 919 } 920 break; 921 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: 922 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, 923 attached); 924 break; 925 case MAX77693_CHARGER_TYPE_APPLE_500MA: 926 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, 927 attached); 928 break; 929 case MAX77693_CHARGER_TYPE_APPLE_1A_2A: 930 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, 931 attached); 932 break; 933 case MAX77693_CHARGER_TYPE_DEAD_BATTERY: 934 break; 935 default: 936 dev_err(info->dev, 937 "failed to detect %s accessory (chg_type:0x%x)\n", 938 attached ? "attached" : "detached", chg_type); 939 return -EINVAL; 940 } 941 942 return 0; 943 } 944 945 static void max77693_muic_irq_work(struct work_struct *work) 946 { 947 struct max77693_muic_info *info = container_of(work, 948 struct max77693_muic_info, irq_work); 949 int irq_type = -1; 950 int i, ret = 0; 951 952 if (!info->edev) 953 return; 954 955 mutex_lock(&info->mutex); 956 957 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) 958 if (info->irq == muic_irqs[i].virq) 959 irq_type = muic_irqs[i].irq; 960 961 ret = regmap_bulk_read(info->max77693->regmap_muic, 962 MAX77693_MUIC_REG_STATUS1, info->status, 2); 963 if (ret) { 964 dev_err(info->dev, "failed to read MUIC register\n"); 965 mutex_unlock(&info->mutex); 966 return; 967 } 968 969 switch (irq_type) { 970 case MAX77693_MUIC_IRQ_INT1_ADC: 971 case MAX77693_MUIC_IRQ_INT1_ADC_LOW: 972 case MAX77693_MUIC_IRQ_INT1_ADC_ERR: 973 case MAX77693_MUIC_IRQ_INT1_ADC1K: 974 /* 975 * Handle all of accessory except for 976 * type of charger accessory. 977 */ 978 ret = max77693_muic_adc_handler(info); 979 break; 980 case MAX77693_MUIC_IRQ_INT2_CHGTYP: 981 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: 982 case MAX77693_MUIC_IRQ_INT2_DCDTMR: 983 case MAX77693_MUIC_IRQ_INT2_DXOVP: 984 case MAX77693_MUIC_IRQ_INT2_VBVOLT: 985 case MAX77693_MUIC_IRQ_INT2_VIDRM: 986 /* Handle charger accessory */ 987 ret = max77693_muic_chg_handler(info); 988 break; 989 case MAX77693_MUIC_IRQ_INT3_EOC: 990 case MAX77693_MUIC_IRQ_INT3_CGMBC: 991 case MAX77693_MUIC_IRQ_INT3_OVP: 992 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: 993 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: 994 case MAX77693_MUIC_IRQ_INT3_BAT_DET: 995 break; 996 default: 997 dev_err(info->dev, "muic interrupt: irq %d occurred\n", 998 irq_type); 999 mutex_unlock(&info->mutex); 1000 return; 1001 } 1002 1003 if (ret < 0) 1004 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 1005 1006 mutex_unlock(&info->mutex); 1007 } 1008 1009 static irqreturn_t max77693_muic_irq_handler(int irq, void *data) 1010 { 1011 struct max77693_muic_info *info = data; 1012 1013 info->irq = irq; 1014 schedule_work(&info->irq_work); 1015 1016 return IRQ_HANDLED; 1017 } 1018 1019 static const struct regmap_config max77693_muic_regmap_config = { 1020 .reg_bits = 8, 1021 .val_bits = 8, 1022 }; 1023 1024 static int max77693_muic_detect_accessory(struct max77693_muic_info *info) 1025 { 1026 int ret = 0; 1027 int adc; 1028 int chg_type; 1029 bool attached; 1030 1031 mutex_lock(&info->mutex); 1032 1033 /* Read STATUSx register to detect accessory */ 1034 ret = regmap_bulk_read(info->max77693->regmap_muic, 1035 MAX77693_MUIC_REG_STATUS1, info->status, 2); 1036 if (ret) { 1037 dev_err(info->dev, "failed to read MUIC register\n"); 1038 mutex_unlock(&info->mutex); 1039 return ret; 1040 } 1041 1042 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC, 1043 &attached); 1044 if (attached && adc != MAX77693_MUIC_ADC_OPEN) { 1045 ret = max77693_muic_adc_handler(info); 1046 if (ret < 0) { 1047 dev_err(info->dev, "Cannot detect accessory\n"); 1048 mutex_unlock(&info->mutex); 1049 return ret; 1050 } 1051 } 1052 1053 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG, 1054 &attached); 1055 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) { 1056 ret = max77693_muic_chg_handler(info); 1057 if (ret < 0) { 1058 dev_err(info->dev, "Cannot detect charger accessory\n"); 1059 mutex_unlock(&info->mutex); 1060 return ret; 1061 } 1062 } 1063 1064 mutex_unlock(&info->mutex); 1065 1066 return 0; 1067 } 1068 1069 static void max77693_muic_detect_cable_wq(struct work_struct *work) 1070 { 1071 struct max77693_muic_info *info = container_of(to_delayed_work(work), 1072 struct max77693_muic_info, wq_detcable); 1073 1074 max77693_muic_detect_accessory(info); 1075 } 1076 1077 static int max77693_muic_probe(struct platform_device *pdev) 1078 { 1079 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); 1080 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev); 1081 struct max77693_muic_info *info; 1082 struct max77693_reg_data *init_data; 1083 int num_init_data; 1084 int delay_jiffies; 1085 int ret; 1086 int i; 1087 unsigned int id; 1088 1089 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info), 1090 GFP_KERNEL); 1091 if (!info) 1092 return -ENOMEM; 1093 1094 info->dev = &pdev->dev; 1095 info->max77693 = max77693; 1096 if (info->max77693->regmap_muic) { 1097 dev_dbg(&pdev->dev, "allocate register map\n"); 1098 } else { 1099 info->max77693->regmap_muic = devm_regmap_init_i2c( 1100 info->max77693->i2c_muic, 1101 &max77693_muic_regmap_config); 1102 if (IS_ERR(info->max77693->regmap_muic)) { 1103 ret = PTR_ERR(info->max77693->regmap_muic); 1104 dev_err(max77693->dev, 1105 "failed to allocate register map: %d\n", ret); 1106 return ret; 1107 } 1108 } 1109 1110 /* Register input device for button of dock device */ 1111 info->dock = devm_input_allocate_device(&pdev->dev); 1112 if (!info->dock) { 1113 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__); 1114 return -ENOMEM; 1115 } 1116 info->dock->name = "max77693-muic/dock"; 1117 info->dock->phys = "max77693-muic/extcon"; 1118 info->dock->dev.parent = &pdev->dev; 1119 1120 __set_bit(EV_REP, info->dock->evbit); 1121 1122 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP); 1123 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN); 1124 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE); 1125 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG); 1126 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG); 1127 1128 ret = input_register_device(info->dock); 1129 if (ret < 0) { 1130 dev_err(&pdev->dev, "Cannot register input device error(%d)\n", 1131 ret); 1132 return ret; 1133 } 1134 1135 platform_set_drvdata(pdev, info); 1136 mutex_init(&info->mutex); 1137 1138 INIT_WORK(&info->irq_work, max77693_muic_irq_work); 1139 1140 /* Support irq domain for MAX77693 MUIC device */ 1141 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { 1142 struct max77693_muic_irq *muic_irq = &muic_irqs[i]; 1143 int virq; 1144 1145 virq = regmap_irq_get_virq(max77693->irq_data_muic, 1146 muic_irq->irq); 1147 if (virq <= 0) 1148 return -EINVAL; 1149 muic_irq->virq = virq; 1150 1151 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, 1152 max77693_muic_irq_handler, 1153 IRQF_NO_SUSPEND, 1154 muic_irq->name, info); 1155 if (ret) { 1156 dev_err(&pdev->dev, 1157 "failed: irq request (IRQ: %d, error :%d)\n", 1158 muic_irq->irq, ret); 1159 return ret; 1160 } 1161 } 1162 1163 /* Initialize extcon device */ 1164 info->edev = devm_extcon_dev_allocate(&pdev->dev, 1165 max77693_extcon_cable); 1166 if (IS_ERR(info->edev)) { 1167 dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); 1168 return -ENOMEM; 1169 } 1170 1171 ret = devm_extcon_dev_register(&pdev->dev, info->edev); 1172 if (ret) { 1173 dev_err(&pdev->dev, "failed to register extcon device\n"); 1174 return ret; 1175 } 1176 1177 /* Initialize MUIC register by using platform data or default data */ 1178 if (pdata && pdata->muic_data) { 1179 init_data = pdata->muic_data->init_data; 1180 num_init_data = pdata->muic_data->num_init_data; 1181 } else { 1182 init_data = default_init_data; 1183 num_init_data = ARRAY_SIZE(default_init_data); 1184 } 1185 1186 for (i = 0; i < num_init_data; i++) { 1187 regmap_write(info->max77693->regmap_muic, 1188 init_data[i].addr, 1189 init_data[i].data); 1190 } 1191 1192 if (pdata && pdata->muic_data) { 1193 struct max77693_muic_platform_data *muic_pdata 1194 = pdata->muic_data; 1195 1196 /* 1197 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB 1198 * h/w path of COMP2/COMN1 on CONTROL1 register. 1199 */ 1200 if (muic_pdata->path_uart) 1201 info->path_uart = muic_pdata->path_uart; 1202 else 1203 info->path_uart = MAX77693_CONTROL1_SW_UART; 1204 1205 if (muic_pdata->path_usb) 1206 info->path_usb = muic_pdata->path_usb; 1207 else 1208 info->path_usb = MAX77693_CONTROL1_SW_USB; 1209 1210 /* 1211 * Default delay time for detecting cable state 1212 * after certain time. 1213 */ 1214 if (muic_pdata->detcable_delay_ms) 1215 delay_jiffies = 1216 msecs_to_jiffies(muic_pdata->detcable_delay_ms); 1217 else 1218 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); 1219 } else { 1220 info->path_usb = MAX77693_CONTROL1_SW_USB; 1221 info->path_uart = MAX77693_CONTROL1_SW_UART; 1222 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); 1223 } 1224 1225 /* Set initial path for UART */ 1226 max77693_muic_set_path(info, info->path_uart, true); 1227 1228 /* Check revision number of MUIC device*/ 1229 ret = regmap_read(info->max77693->regmap_muic, 1230 MAX77693_MUIC_REG_ID, &id); 1231 if (ret < 0) { 1232 dev_err(&pdev->dev, "failed to read revision number\n"); 1233 return ret; 1234 } 1235 dev_info(info->dev, "device ID : 0x%x\n", id); 1236 1237 /* Set ADC debounce time */ 1238 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); 1239 1240 /* 1241 * Detect accessory after completing the initialization of platform 1242 * 1243 * - Use delayed workqueue to detect cable state and then 1244 * notify cable state to notifiee/platform through uevent. 1245 * After completing the booting of platform, the extcon provider 1246 * driver should notify cable state to upper layer. 1247 */ 1248 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq); 1249 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 1250 delay_jiffies); 1251 1252 return ret; 1253 } 1254 1255 static int max77693_muic_remove(struct platform_device *pdev) 1256 { 1257 struct max77693_muic_info *info = platform_get_drvdata(pdev); 1258 1259 cancel_work_sync(&info->irq_work); 1260 input_unregister_device(info->dock); 1261 1262 return 0; 1263 } 1264 1265 static struct platform_driver max77693_muic_driver = { 1266 .driver = { 1267 .name = DEV_NAME, 1268 }, 1269 .probe = max77693_muic_probe, 1270 .remove = max77693_muic_remove, 1271 }; 1272 1273 module_platform_driver(max77693_muic_driver); 1274 1275 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); 1276 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 1277 MODULE_LICENSE("GPL"); 1278 MODULE_ALIAS("platform:extcon-max77693"); 1279