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-private.h> 28 #include <linux/extcon.h> 29 #include <linux/regmap.h> 30 #include <linux/irqdomain.h> 31 32 #define DEV_NAME "max77693-muic" 33 #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ 34 35 /* 36 * Default value of MAX77693 register to bring up MUIC device. 37 * If user don't set some initial value for MUIC device through platform data, 38 * extcon-max77693 driver use 'default_init_data' to bring up base operation 39 * of MAX77693 MUIC device. 40 */ 41 static struct max77693_reg_data default_init_data[] = { 42 { 43 /* STATUS2 - [3]ChgDetRun */ 44 .addr = MAX77693_MUIC_REG_STATUS2, 45 .data = STATUS2_CHGDETRUN_MASK, 46 }, { 47 /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */ 48 .addr = MAX77693_MUIC_REG_INTMASK1, 49 .data = INTMASK1_ADC1K_MASK 50 | INTMASK1_ADC_MASK, 51 }, { 52 /* INTMASK2 - Unmask [0]ChgTypM */ 53 .addr = MAX77693_MUIC_REG_INTMASK2, 54 .data = INTMASK2_CHGTYP_MASK, 55 }, { 56 /* INTMASK3 - Mask all of interrupts */ 57 .addr = MAX77693_MUIC_REG_INTMASK3, 58 .data = 0x0, 59 }, { 60 /* CDETCTRL2 */ 61 .addr = MAX77693_MUIC_REG_CDETCTRL2, 62 .data = CDETCTRL2_VIDRMEN_MASK 63 | CDETCTRL2_DXOVPEN_MASK, 64 }, 65 }; 66 67 enum max77693_muic_adc_debounce_time { 68 ADC_DEBOUNCE_TIME_5MS = 0, 69 ADC_DEBOUNCE_TIME_10MS, 70 ADC_DEBOUNCE_TIME_25MS, 71 ADC_DEBOUNCE_TIME_38_62MS, 72 }; 73 74 struct max77693_muic_info { 75 struct device *dev; 76 struct max77693_dev *max77693; 77 struct extcon_dev *edev; 78 int prev_cable_type; 79 int prev_cable_type_gnd; 80 int prev_chg_type; 81 int prev_button_type; 82 u8 status[2]; 83 84 int irq; 85 struct work_struct irq_work; 86 struct mutex mutex; 87 88 /* 89 * Use delayed workqueue to detect cable state and then 90 * notify cable state to notifiee/platform through uevent. 91 * After completing the booting of platform, the extcon provider 92 * driver should notify cable state to upper layer. 93 */ 94 struct delayed_work wq_detcable; 95 96 /* Button of dock device */ 97 struct input_dev *dock; 98 99 /* 100 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB 101 * h/w path of COMP2/COMN1 on CONTROL1 register. 102 */ 103 int path_usb; 104 int path_uart; 105 }; 106 107 enum max77693_muic_cable_group { 108 MAX77693_CABLE_GROUP_ADC = 0, 109 MAX77693_CABLE_GROUP_ADC_GND, 110 MAX77693_CABLE_GROUP_CHG, 111 MAX77693_CABLE_GROUP_VBVOLT, 112 }; 113 114 enum max77693_muic_charger_type { 115 MAX77693_CHARGER_TYPE_NONE = 0, 116 MAX77693_CHARGER_TYPE_USB, 117 MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT, 118 MAX77693_CHARGER_TYPE_DEDICATED_CHG, 119 MAX77693_CHARGER_TYPE_APPLE_500MA, 120 MAX77693_CHARGER_TYPE_APPLE_1A_2A, 121 MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7, 122 }; 123 124 /** 125 * struct max77693_muic_irq 126 * @irq: the index of irq list of MUIC device. 127 * @name: the name of irq. 128 * @virq: the virtual irq to use irq domain 129 */ 130 struct max77693_muic_irq { 131 unsigned int irq; 132 const char *name; 133 unsigned int virq; 134 }; 135 136 static struct max77693_muic_irq muic_irqs[] = { 137 { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" }, 138 { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" }, 139 { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" }, 140 { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" }, 141 { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, 142 { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" }, 143 { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, 144 { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" }, 145 { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, 146 { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" }, 147 { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" }, 148 { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" }, 149 { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" }, 150 { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" }, 151 { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" }, 152 { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" }, 153 }; 154 155 /* Define supported accessory type */ 156 enum max77693_muic_acc_type { 157 MAX77693_MUIC_ADC_GROUND = 0x0, 158 MAX77693_MUIC_ADC_SEND_END_BUTTON, 159 MAX77693_MUIC_ADC_REMOTE_S1_BUTTON, 160 MAX77693_MUIC_ADC_REMOTE_S2_BUTTON, 161 MAX77693_MUIC_ADC_REMOTE_S3_BUTTON, 162 MAX77693_MUIC_ADC_REMOTE_S4_BUTTON, 163 MAX77693_MUIC_ADC_REMOTE_S5_BUTTON, 164 MAX77693_MUIC_ADC_REMOTE_S6_BUTTON, 165 MAX77693_MUIC_ADC_REMOTE_S7_BUTTON, 166 MAX77693_MUIC_ADC_REMOTE_S8_BUTTON, 167 MAX77693_MUIC_ADC_REMOTE_S9_BUTTON, 168 MAX77693_MUIC_ADC_REMOTE_S10_BUTTON, 169 MAX77693_MUIC_ADC_REMOTE_S11_BUTTON, 170 MAX77693_MUIC_ADC_REMOTE_S12_BUTTON, 171 MAX77693_MUIC_ADC_RESERVED_ACC_1, 172 MAX77693_MUIC_ADC_RESERVED_ACC_2, 173 MAX77693_MUIC_ADC_RESERVED_ACC_3, 174 MAX77693_MUIC_ADC_RESERVED_ACC_4, 175 MAX77693_MUIC_ADC_RESERVED_ACC_5, 176 MAX77693_MUIC_ADC_CEA936_AUDIO, 177 MAX77693_MUIC_ADC_PHONE_POWERED_DEV, 178 MAX77693_MUIC_ADC_TTY_CONVERTER, 179 MAX77693_MUIC_ADC_UART_CABLE, 180 MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG, 181 MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF, 182 MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON, 183 MAX77693_MUIC_ADC_AV_CABLE_NOLOAD, 184 MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG, 185 MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF, 186 MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON, 187 MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE, 188 MAX77693_MUIC_ADC_OPEN, 189 190 /* The below accessories have same ADC value so ADCLow and 191 ADC1K bit is used to separate specific accessory */ 192 /* ADC|VBVolot|ADCLow|ADC1K| */ 193 MAX77693_MUIC_GND_USB_OTG = 0x100, /* 0x0| 0| 0| 0| */ 194 MAX77693_MUIC_GND_USB_OTG_VB = 0x104, /* 0x0| 1| 0| 0| */ 195 MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */ 196 MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */ 197 MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */ 198 }; 199 200 /* 201 * MAX77693 MUIC device support below list of accessories(external connector) 202 */ 203 enum { 204 EXTCON_CABLE_USB = 0, 205 EXTCON_CABLE_USB_HOST, 206 EXTCON_CABLE_TA, 207 EXTCON_CABLE_FAST_CHARGER, 208 EXTCON_CABLE_SLOW_CHARGER, 209 EXTCON_CABLE_CHARGE_DOWNSTREAM, 210 EXTCON_CABLE_MHL, 211 EXTCON_CABLE_MHL_TA, 212 EXTCON_CABLE_JIG_USB_ON, 213 EXTCON_CABLE_JIG_USB_OFF, 214 EXTCON_CABLE_JIG_UART_OFF, 215 EXTCON_CABLE_JIG_UART_ON, 216 EXTCON_CABLE_DOCK_SMART, 217 EXTCON_CABLE_DOCK_DESK, 218 EXTCON_CABLE_DOCK_AUDIO, 219 220 _EXTCON_CABLE_NUM, 221 }; 222 223 static const char *max77693_extcon_cable[] = { 224 [EXTCON_CABLE_USB] = "USB", 225 [EXTCON_CABLE_USB_HOST] = "USB-Host", 226 [EXTCON_CABLE_TA] = "TA", 227 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger", 228 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger", 229 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream", 230 [EXTCON_CABLE_MHL] = "MHL", 231 [EXTCON_CABLE_MHL_TA] = "MHL_TA", 232 [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON", 233 [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF", 234 [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF", 235 [EXTCON_CABLE_JIG_UART_ON] = "Dock-Car", 236 [EXTCON_CABLE_DOCK_SMART] = "Dock-Smart", 237 [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk", 238 [EXTCON_CABLE_DOCK_AUDIO] = "Dock-Audio", 239 240 NULL, 241 }; 242 243 /* 244 * max77693_muic_set_debounce_time - Set the debounce time of ADC 245 * @info: the instance including private data of max77693 MUIC 246 * @time: the debounce time of ADC 247 */ 248 static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, 249 enum max77693_muic_adc_debounce_time time) 250 { 251 int ret; 252 253 switch (time) { 254 case ADC_DEBOUNCE_TIME_5MS: 255 case ADC_DEBOUNCE_TIME_10MS: 256 case ADC_DEBOUNCE_TIME_25MS: 257 case ADC_DEBOUNCE_TIME_38_62MS: 258 ret = max77693_update_reg(info->max77693->regmap_muic, 259 MAX77693_MUIC_REG_CTRL3, 260 time << CONTROL3_ADCDBSET_SHIFT, 261 CONTROL3_ADCDBSET_MASK); 262 if (ret) { 263 dev_err(info->dev, "failed to set ADC debounce time\n"); 264 return ret; 265 } 266 break; 267 default: 268 dev_err(info->dev, "invalid ADC debounce time\n"); 269 return -EINVAL; 270 } 271 272 return 0; 273 }; 274 275 /* 276 * max77693_muic_set_path - Set hardware line according to attached cable 277 * @info: the instance including private data of max77693 MUIC 278 * @value: the path according to attached cable 279 * @attached: the state of cable (true:attached, false:detached) 280 * 281 * The max77693 MUIC device share outside H/W line among a varity of cables 282 * so, this function set internal path of H/W line according to the type of 283 * attached cable. 284 */ 285 static int max77693_muic_set_path(struct max77693_muic_info *info, 286 u8 val, bool attached) 287 { 288 int ret = 0; 289 u8 ctrl1, ctrl2 = 0; 290 291 if (attached) 292 ctrl1 = val; 293 else 294 ctrl1 = CONTROL1_SW_OPEN; 295 296 ret = max77693_update_reg(info->max77693->regmap_muic, 297 MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); 298 if (ret < 0) { 299 dev_err(info->dev, "failed to update MUIC register\n"); 300 return ret; 301 } 302 303 if (attached) 304 ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ 305 else 306 ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ 307 308 ret = max77693_update_reg(info->max77693->regmap_muic, 309 MAX77693_MUIC_REG_CTRL2, ctrl2, 310 CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); 311 if (ret < 0) { 312 dev_err(info->dev, "failed to update MUIC register\n"); 313 return ret; 314 } 315 316 dev_info(info->dev, 317 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 318 ctrl1, ctrl2, attached ? "attached" : "detached"); 319 320 return 0; 321 } 322 323 /* 324 * max77693_muic_get_cable_type - Return cable type and check cable state 325 * @info: the instance including private data of max77693 MUIC 326 * @group: the path according to attached cable 327 * @attached: store cable state and return 328 * 329 * This function check the cable state either attached or detached, 330 * and then divide precise type of cable according to cable group. 331 * - MAX77693_CABLE_GROUP_ADC 332 * - MAX77693_CABLE_GROUP_ADC_GND 333 * - MAX77693_CABLE_GROUP_CHG 334 * - MAX77693_CABLE_GROUP_VBVOLT 335 */ 336 static int max77693_muic_get_cable_type(struct max77693_muic_info *info, 337 enum max77693_muic_cable_group group, bool *attached) 338 { 339 int cable_type = 0; 340 int adc; 341 int adc1k; 342 int adclow; 343 int vbvolt; 344 int chg_type; 345 346 switch (group) { 347 case MAX77693_CABLE_GROUP_ADC: 348 /* 349 * Read ADC value to check cable type and decide cable state 350 * according to cable type 351 */ 352 adc = info->status[0] & STATUS1_ADC_MASK; 353 adc >>= STATUS1_ADC_SHIFT; 354 355 /* 356 * Check current cable state/cable type and store cable type 357 * (info->prev_cable_type) for handling cable when cable is 358 * detached. 359 */ 360 if (adc == MAX77693_MUIC_ADC_OPEN) { 361 *attached = false; 362 363 cable_type = info->prev_cable_type; 364 info->prev_cable_type = MAX77693_MUIC_ADC_OPEN; 365 } else { 366 *attached = true; 367 368 cable_type = info->prev_cable_type = adc; 369 } 370 break; 371 case MAX77693_CABLE_GROUP_ADC_GND: 372 /* 373 * Read ADC value to check cable type and decide cable state 374 * according to cable type 375 */ 376 adc = info->status[0] & STATUS1_ADC_MASK; 377 adc >>= STATUS1_ADC_SHIFT; 378 379 /* 380 * Check current cable state/cable type and store cable type 381 * (info->prev_cable_type/_gnd) for handling cable when cable 382 * is detached. 383 */ 384 if (adc == MAX77693_MUIC_ADC_OPEN) { 385 *attached = false; 386 387 cable_type = info->prev_cable_type_gnd; 388 info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN; 389 } else { 390 *attached = true; 391 392 adclow = info->status[0] & STATUS1_ADCLOW_MASK; 393 adclow >>= STATUS1_ADCLOW_SHIFT; 394 adc1k = info->status[0] & STATUS1_ADC1K_MASK; 395 adc1k >>= STATUS1_ADC1K_SHIFT; 396 397 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK; 398 vbvolt >>= STATUS2_VBVOLT_SHIFT; 399 400 /** 401 * [0x1|VBVolt|ADCLow|ADC1K] 402 * [0x1| 0| 0| 0] USB_OTG 403 * [0x1| 1| 0| 0] USB_OTG_VB 404 * [0x1| 0| 1| 0] Audio Video cable with load 405 * [0x1| 0| 1| 1] MHL without charging cable 406 * [0x1| 1| 1| 1] MHL with charging cable 407 */ 408 cable_type = ((0x1 << 8) 409 | (vbvolt << 2) 410 | (adclow << 1) 411 | adc1k); 412 413 info->prev_cable_type = adc; 414 info->prev_cable_type_gnd = cable_type; 415 } 416 417 break; 418 case MAX77693_CABLE_GROUP_CHG: 419 /* 420 * Read charger type to check cable type and decide cable state 421 * according to type of charger cable. 422 */ 423 chg_type = info->status[1] & STATUS2_CHGTYP_MASK; 424 chg_type >>= STATUS2_CHGTYP_SHIFT; 425 426 if (chg_type == MAX77693_CHARGER_TYPE_NONE) { 427 *attached = false; 428 429 cable_type = info->prev_chg_type; 430 info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE; 431 } else { 432 *attached = true; 433 434 /* 435 * Check current cable state/cable type and store cable 436 * type(info->prev_chg_type) for handling cable when 437 * charger cable is detached. 438 */ 439 cable_type = info->prev_chg_type = chg_type; 440 } 441 442 break; 443 case MAX77693_CABLE_GROUP_VBVOLT: 444 /* 445 * Read ADC value to check cable type and decide cable state 446 * according to cable type 447 */ 448 adc = info->status[0] & STATUS1_ADC_MASK; 449 adc >>= STATUS1_ADC_SHIFT; 450 chg_type = info->status[1] & STATUS2_CHGTYP_MASK; 451 chg_type >>= STATUS2_CHGTYP_SHIFT; 452 453 if (adc == MAX77693_MUIC_ADC_OPEN 454 && chg_type == MAX77693_CHARGER_TYPE_NONE) 455 *attached = false; 456 else 457 *attached = true; 458 459 /* 460 * Read vbvolt field, if vbvolt is 1, 461 * this cable is used for charging. 462 */ 463 vbvolt = info->status[1] & STATUS2_VBVOLT_MASK; 464 vbvolt >>= STATUS2_VBVOLT_SHIFT; 465 466 cable_type = vbvolt; 467 break; 468 default: 469 dev_err(info->dev, "Unknown cable group (%d)\n", group); 470 cable_type = -EINVAL; 471 break; 472 } 473 474 return cable_type; 475 } 476 477 static int max77693_muic_dock_handler(struct max77693_muic_info *info, 478 int cable_type, bool attached) 479 { 480 int ret = 0; 481 int vbvolt; 482 bool cable_attached; 483 char dock_name[CABLE_NAME_MAX]; 484 485 dev_info(info->dev, 486 "external connector is %s (adc:0x%02x)\n", 487 attached ? "attached" : "detached", cable_type); 488 489 switch (cable_type) { 490 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ 491 /* 492 * Check power cable whether attached or detached state. 493 * The Dock-Smart device need surely external power supply. 494 * If power cable(USB/TA) isn't connected to Dock device, 495 * user can't use Dock-Smart for desktop mode. 496 */ 497 vbvolt = max77693_muic_get_cable_type(info, 498 MAX77693_CABLE_GROUP_VBVOLT, &cable_attached); 499 if (attached && !vbvolt) { 500 dev_warn(info->dev, 501 "Cannot detect external power supply\n"); 502 return 0; 503 } 504 505 /* 506 * Notify Dock-Smart/MHL state. 507 * - Dock-Smart device include three type of cable which 508 * are HDMI, USB for mouse/keyboard and micro-usb port 509 * for USB/TA cable. Dock-Smart device need always exteranl 510 * power supply(USB/TA cable through micro-usb cable). Dock- 511 * Smart device support screen output of target to separate 512 * monitor and mouse/keyboard for desktop mode. 513 * 514 * Features of 'USB/TA cable with Dock-Smart device' 515 * - Support MHL 516 * - Support external output feature of audio 517 * - Support charging through micro-usb port without data 518 * connection if TA cable is connected to target. 519 * - Support charging and data connection through micro-usb port 520 * if USB cable is connected between target and host 521 * device. 522 * - Support OTG device (Mouse/Keyboard) 523 */ 524 ret = max77693_muic_set_path(info, info->path_usb, attached); 525 if (ret < 0) 526 return ret; 527 528 extcon_set_cable_state(info->edev, "Dock-Smart", attached); 529 extcon_set_cable_state(info->edev, "MHL", attached); 530 goto out; 531 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */ 532 strcpy(dock_name, "Dock-Car"); 533 break; 534 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ 535 strcpy(dock_name, "Dock-Desk"); 536 break; 537 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ 538 strcpy(dock_name, "Dock-Audio"); 539 if (!attached) 540 extcon_set_cable_state(info->edev, "USB", false); 541 break; 542 default: 543 dev_err(info->dev, "failed to detect %s dock device\n", 544 attached ? "attached" : "detached"); 545 return -EINVAL; 546 } 547 548 /* Dock-Car/Desk/Audio, PATH:AUDIO */ 549 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); 550 if (ret < 0) 551 return ret; 552 extcon_set_cable_state(info->edev, dock_name, attached); 553 554 out: 555 return 0; 556 } 557 558 static int max77693_muic_dock_button_handler(struct max77693_muic_info *info, 559 int button_type, bool attached) 560 { 561 struct input_dev *dock = info->dock; 562 unsigned int code; 563 564 switch (button_type) { 565 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1 566 ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1: 567 /* DOCK_KEY_PREV */ 568 code = KEY_PREVIOUSSONG; 569 break; 570 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1 571 ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1: 572 /* DOCK_KEY_NEXT */ 573 code = KEY_NEXTSONG; 574 break; 575 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: 576 /* DOCK_VOL_DOWN */ 577 code = KEY_VOLUMEDOWN; 578 break; 579 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: 580 /* DOCK_VOL_UP */ 581 code = KEY_VOLUMEUP; 582 break; 583 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1 584 ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1: 585 /* DOCK_KEY_PLAY_PAUSE */ 586 code = KEY_PLAYPAUSE; 587 break; 588 default: 589 dev_err(info->dev, 590 "failed to detect %s key (adc:0x%x)\n", 591 attached ? "pressed" : "released", button_type); 592 return -EINVAL; 593 } 594 595 input_event(dock, EV_KEY, code, attached); 596 input_sync(dock); 597 598 return 0; 599 } 600 601 static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) 602 { 603 int cable_type_gnd; 604 int ret = 0; 605 bool attached; 606 607 cable_type_gnd = max77693_muic_get_cable_type(info, 608 MAX77693_CABLE_GROUP_ADC_GND, &attached); 609 610 switch (cable_type_gnd) { 611 case MAX77693_MUIC_GND_USB_OTG: 612 case MAX77693_MUIC_GND_USB_OTG_VB: 613 /* USB_OTG, PATH: AP_USB */ 614 ret = max77693_muic_set_path(info, CONTROL1_SW_USB, attached); 615 if (ret < 0) 616 return ret; 617 extcon_set_cable_state(info->edev, "USB-Host", attached); 618 break; 619 case MAX77693_MUIC_GND_AV_CABLE_LOAD: 620 /* Audio Video Cable with load, PATH:AUDIO */ 621 ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached); 622 if (ret < 0) 623 return ret; 624 extcon_set_cable_state(info->edev, 625 "Audio-video-load", attached); 626 break; 627 case MAX77693_MUIC_GND_MHL: 628 case MAX77693_MUIC_GND_MHL_VB: 629 /* MHL or MHL with USB/TA cable */ 630 extcon_set_cable_state(info->edev, "MHL", attached); 631 break; 632 default: 633 dev_err(info->dev, "failed to detect %s cable of gnd type\n", 634 attached ? "attached" : "detached"); 635 return -EINVAL; 636 } 637 638 return 0; 639 } 640 641 static int max77693_muic_jig_handler(struct max77693_muic_info *info, 642 int cable_type, bool attached) 643 { 644 char cable_name[32]; 645 int ret = 0; 646 u8 path = CONTROL1_SW_OPEN; 647 648 dev_info(info->dev, 649 "external connector is %s (adc:0x%02x)\n", 650 attached ? "attached" : "detached", cable_type); 651 652 switch (cable_type) { 653 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ 654 /* PATH:AP_USB */ 655 strcpy(cable_name, "JIG-USB-OFF"); 656 path = CONTROL1_SW_USB; 657 break; 658 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ 659 /* PATH:AP_USB */ 660 strcpy(cable_name, "JIG-USB-ON"); 661 path = CONTROL1_SW_USB; 662 break; 663 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ 664 /* PATH:AP_UART */ 665 strcpy(cable_name, "JIG-UART-OFF"); 666 path = CONTROL1_SW_UART; 667 break; 668 default: 669 dev_err(info->dev, "failed to detect %s jig cable\n", 670 attached ? "attached" : "detached"); 671 return -EINVAL; 672 } 673 674 ret = max77693_muic_set_path(info, path, attached); 675 if (ret < 0) 676 return ret; 677 678 extcon_set_cable_state(info->edev, cable_name, attached); 679 680 return 0; 681 } 682 683 static int max77693_muic_adc_handler(struct max77693_muic_info *info) 684 { 685 int cable_type; 686 int button_type; 687 bool attached; 688 int ret = 0; 689 690 /* Check accessory state which is either detached or attached */ 691 cable_type = max77693_muic_get_cable_type(info, 692 MAX77693_CABLE_GROUP_ADC, &attached); 693 694 dev_info(info->dev, 695 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 696 attached ? "attached" : "detached", cable_type, 697 info->prev_cable_type); 698 699 switch (cable_type) { 700 case MAX77693_MUIC_ADC_GROUND: 701 /* USB_OTG/MHL/Audio */ 702 max77693_muic_adc_ground_handler(info); 703 break; 704 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: 705 case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: 706 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: 707 /* JIG */ 708 ret = max77693_muic_jig_handler(info, cable_type, attached); 709 if (ret < 0) 710 return ret; 711 break; 712 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ 713 case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* Dock-Car */ 714 case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */ 715 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ 716 /* 717 * DOCK device 718 * 719 * The MAX77693 MUIC device can detect total 34 cable type 720 * except of charger cable and MUIC device didn't define 721 * specfic role of cable in the range of from 0x01 to 0x12 722 * of ADC value. So, can use/define cable with no role according 723 * to schema of hardware board. 724 */ 725 ret = max77693_muic_dock_handler(info, cable_type, attached); 726 if (ret < 0) 727 return ret; 728 break; 729 case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */ 730 case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */ 731 case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */ 732 case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */ 733 case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */ 734 /* 735 * Button of DOCK device 736 * - the Prev/Next/Volume Up/Volume Down/Play-Pause button 737 * 738 * The MAX77693 MUIC device can detect total 34 cable type 739 * except of charger cable and MUIC device didn't define 740 * specfic role of cable in the range of from 0x01 to 0x12 741 * of ADC value. So, can use/define cable with no role according 742 * to schema of hardware board. 743 */ 744 if (attached) 745 button_type = info->prev_button_type = cable_type; 746 else 747 button_type = info->prev_button_type; 748 749 ret = max77693_muic_dock_button_handler(info, button_type, 750 attached); 751 if (ret < 0) 752 return ret; 753 break; 754 case MAX77693_MUIC_ADC_SEND_END_BUTTON: 755 case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON: 756 case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON: 757 case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON: 758 case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON: 759 case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON: 760 case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON: 761 case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON: 762 case MAX77693_MUIC_ADC_RESERVED_ACC_1: 763 case MAX77693_MUIC_ADC_RESERVED_ACC_2: 764 case MAX77693_MUIC_ADC_RESERVED_ACC_4: 765 case MAX77693_MUIC_ADC_RESERVED_ACC_5: 766 case MAX77693_MUIC_ADC_CEA936_AUDIO: 767 case MAX77693_MUIC_ADC_PHONE_POWERED_DEV: 768 case MAX77693_MUIC_ADC_TTY_CONVERTER: 769 case MAX77693_MUIC_ADC_UART_CABLE: 770 case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG: 771 case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG: 772 /* 773 * This accessory isn't used in general case if it is specially 774 * needed to detect additional accessory, should implement 775 * proper operation when this accessory is attached/detached. 776 */ 777 dev_info(info->dev, 778 "accessory is %s but it isn't used (adc:0x%x)\n", 779 attached ? "attached" : "detached", cable_type); 780 return -EAGAIN; 781 default: 782 dev_err(info->dev, 783 "failed to detect %s accessory (adc:0x%x)\n", 784 attached ? "attached" : "detached", cable_type); 785 return -EINVAL; 786 } 787 788 return 0; 789 } 790 791 static int max77693_muic_chg_handler(struct max77693_muic_info *info) 792 { 793 int chg_type; 794 int cable_type_gnd; 795 int cable_type; 796 bool attached; 797 bool cable_attached; 798 int ret = 0; 799 800 chg_type = max77693_muic_get_cable_type(info, 801 MAX77693_CABLE_GROUP_CHG, &attached); 802 803 dev_info(info->dev, 804 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 805 attached ? "attached" : "detached", 806 chg_type, info->prev_chg_type); 807 808 switch (chg_type) { 809 case MAX77693_CHARGER_TYPE_USB: 810 case MAX77693_CHARGER_TYPE_DEDICATED_CHG: 811 case MAX77693_CHARGER_TYPE_NONE: 812 /* Check MAX77693_CABLE_GROUP_ADC_GND type */ 813 cable_type_gnd = max77693_muic_get_cable_type(info, 814 MAX77693_CABLE_GROUP_ADC_GND, 815 &cable_attached); 816 switch (cable_type_gnd) { 817 case MAX77693_MUIC_GND_MHL: 818 case MAX77693_MUIC_GND_MHL_VB: 819 /* 820 * MHL cable with MHL_TA(USB/TA) cable 821 * - MHL cable include two port(HDMI line and separate 822 * micro-usb port. When the target connect MHL cable, 823 * extcon driver check whether MHL_TA(USB/TA) cable is 824 * connected. If MHL_TA cable is connected, extcon 825 * driver notify state to notifiee for charging battery. 826 * 827 * Features of 'MHL_TA(USB/TA) with MHL cable' 828 * - Support MHL 829 * - Support charging through micro-usb port without 830 * data connection 831 */ 832 extcon_set_cable_state(info->edev, "MHL_TA", attached); 833 if (!cable_attached) 834 extcon_set_cable_state(info->edev, 835 "MHL", cable_attached); 836 break; 837 } 838 839 /* Check MAX77693_CABLE_GROUP_ADC type */ 840 cable_type = max77693_muic_get_cable_type(info, 841 MAX77693_CABLE_GROUP_ADC, 842 &cable_attached); 843 switch (cable_type) { 844 case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */ 845 /* 846 * Dock-Audio device with USB/TA cable 847 * - Dock device include two port(Dock-Audio and micro- 848 * usb port). When the target connect Dock-Audio device, 849 * extcon driver check whether USB/TA cable is connected 850 * or not. If USB/TA cable is connected, extcon driver 851 * notify state to notifiee for charging battery. 852 * 853 * Features of 'USB/TA cable with Dock-Audio device' 854 * - Support external output feature of audio. 855 * - Support charging through micro-usb port without 856 * data connection. 857 */ 858 extcon_set_cable_state(info->edev, "USB", attached); 859 860 if (!cable_attached) 861 extcon_set_cable_state(info->edev, "Dock-Audio", 862 cable_attached); 863 break; 864 case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */ 865 /* 866 * Dock-Smart device with USB/TA cable 867 * - Dock-Desk device include three type of cable which 868 * are HDMI, USB for mouse/keyboard and micro-usb port 869 * for USB/TA cable. Dock-Smart device need always 870 * exteranl power supply(USB/TA cable through micro-usb 871 * cable). Dock-Smart device support screen output of 872 * target to separate monitor and mouse/keyboard for 873 * desktop mode. 874 * 875 * Features of 'USB/TA cable with Dock-Smart device' 876 * - Support MHL 877 * - Support external output feature of audio 878 * - Support charging through micro-usb port without 879 * data connection if TA cable is connected to target. 880 * - Support charging and data connection through micro- 881 * usb port if USB cable is connected between target 882 * and host device 883 * - Support OTG device (Mouse/Keyboard) 884 */ 885 ret = max77693_muic_set_path(info, info->path_usb, 886 attached); 887 if (ret < 0) 888 return ret; 889 890 extcon_set_cable_state(info->edev, "Dock-Smart", 891 attached); 892 extcon_set_cable_state(info->edev, "MHL", attached); 893 894 break; 895 } 896 897 /* Check MAX77693_CABLE_GROUP_CHG type */ 898 switch (chg_type) { 899 case MAX77693_CHARGER_TYPE_NONE: 900 /* 901 * When MHL(with USB/TA cable) or Dock-Audio with USB/TA 902 * cable is attached, muic device happen below two irq. 903 * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting 904 * MHL/Dock-Audio. 905 * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting 906 * USB/TA cable connected to MHL or Dock-Audio. 907 * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC 908 * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq. 909 * 910 * If user attach MHL (with USB/TA cable and immediately 911 * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ 912 * _INT2_CHGTYP irq is happened, USB/TA cable remain 913 * connected state to target. But USB/TA cable isn't 914 * connected to target. The user be face with unusual 915 * action. So, driver should check this situation in 916 * spite of, that previous charger type is N/A. 917 */ 918 break; 919 case MAX77693_CHARGER_TYPE_USB: 920 /* Only USB cable, PATH:AP_USB */ 921 ret = max77693_muic_set_path(info, info->path_usb, 922 attached); 923 if (ret < 0) 924 return ret; 925 926 extcon_set_cable_state(info->edev, "USB", attached); 927 break; 928 case MAX77693_CHARGER_TYPE_DEDICATED_CHG: 929 /* Only TA cable */ 930 extcon_set_cable_state(info->edev, "TA", attached); 931 break; 932 } 933 break; 934 case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT: 935 extcon_set_cable_state(info->edev, 936 "Charge-downstream", attached); 937 break; 938 case MAX77693_CHARGER_TYPE_APPLE_500MA: 939 extcon_set_cable_state(info->edev, "Slow-charger", attached); 940 break; 941 case MAX77693_CHARGER_TYPE_APPLE_1A_2A: 942 extcon_set_cable_state(info->edev, "Fast-charger", attached); 943 break; 944 case MAX77693_CHARGER_TYPE_DEAD_BATTERY: 945 break; 946 default: 947 dev_err(info->dev, 948 "failed to detect %s accessory (chg_type:0x%x)\n", 949 attached ? "attached" : "detached", chg_type); 950 return -EINVAL; 951 } 952 953 return 0; 954 } 955 956 static void max77693_muic_irq_work(struct work_struct *work) 957 { 958 struct max77693_muic_info *info = container_of(work, 959 struct max77693_muic_info, irq_work); 960 int irq_type = -1; 961 int i, ret = 0; 962 963 if (!info->edev) 964 return; 965 966 mutex_lock(&info->mutex); 967 968 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) 969 if (info->irq == muic_irqs[i].virq) 970 irq_type = muic_irqs[i].irq; 971 972 ret = max77693_bulk_read(info->max77693->regmap_muic, 973 MAX77693_MUIC_REG_STATUS1, 2, info->status); 974 if (ret) { 975 dev_err(info->dev, "failed to read MUIC register\n"); 976 mutex_unlock(&info->mutex); 977 return; 978 } 979 980 switch (irq_type) { 981 case MAX77693_MUIC_IRQ_INT1_ADC: 982 case MAX77693_MUIC_IRQ_INT1_ADC_LOW: 983 case MAX77693_MUIC_IRQ_INT1_ADC_ERR: 984 case MAX77693_MUIC_IRQ_INT1_ADC1K: 985 /* Handle all of accessory except for 986 type of charger accessory */ 987 ret = max77693_muic_adc_handler(info); 988 break; 989 case MAX77693_MUIC_IRQ_INT2_CHGTYP: 990 case MAX77693_MUIC_IRQ_INT2_CHGDETREUN: 991 case MAX77693_MUIC_IRQ_INT2_DCDTMR: 992 case MAX77693_MUIC_IRQ_INT2_DXOVP: 993 case MAX77693_MUIC_IRQ_INT2_VBVOLT: 994 case MAX77693_MUIC_IRQ_INT2_VIDRM: 995 /* Handle charger accessory */ 996 ret = max77693_muic_chg_handler(info); 997 break; 998 case MAX77693_MUIC_IRQ_INT3_EOC: 999 case MAX77693_MUIC_IRQ_INT3_CGMBC: 1000 case MAX77693_MUIC_IRQ_INT3_OVP: 1001 case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR: 1002 case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED: 1003 case MAX77693_MUIC_IRQ_INT3_BAT_DET: 1004 break; 1005 default: 1006 dev_err(info->dev, "muic interrupt: irq %d occurred\n", 1007 irq_type); 1008 mutex_unlock(&info->mutex); 1009 return; 1010 } 1011 1012 if (ret < 0) 1013 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 1014 1015 mutex_unlock(&info->mutex); 1016 1017 return; 1018 } 1019 1020 static irqreturn_t max77693_muic_irq_handler(int irq, void *data) 1021 { 1022 struct max77693_muic_info *info = data; 1023 1024 info->irq = irq; 1025 schedule_work(&info->irq_work); 1026 1027 return IRQ_HANDLED; 1028 } 1029 1030 static struct regmap_config max77693_muic_regmap_config = { 1031 .reg_bits = 8, 1032 .val_bits = 8, 1033 }; 1034 1035 static int max77693_muic_detect_accessory(struct max77693_muic_info *info) 1036 { 1037 int ret = 0; 1038 int adc; 1039 int chg_type; 1040 bool attached; 1041 1042 mutex_lock(&info->mutex); 1043 1044 /* Read STATUSx register to detect accessory */ 1045 ret = max77693_bulk_read(info->max77693->regmap_muic, 1046 MAX77693_MUIC_REG_STATUS1, 2, info->status); 1047 if (ret) { 1048 dev_err(info->dev, "failed to read MUIC register\n"); 1049 mutex_unlock(&info->mutex); 1050 return ret; 1051 } 1052 1053 adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC, 1054 &attached); 1055 if (attached && adc != MAX77693_MUIC_ADC_OPEN) { 1056 ret = max77693_muic_adc_handler(info); 1057 if (ret < 0) { 1058 dev_err(info->dev, "Cannot detect accessory\n"); 1059 mutex_unlock(&info->mutex); 1060 return ret; 1061 } 1062 } 1063 1064 chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG, 1065 &attached); 1066 if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) { 1067 ret = max77693_muic_chg_handler(info); 1068 if (ret < 0) { 1069 dev_err(info->dev, "Cannot detect charger accessory\n"); 1070 mutex_unlock(&info->mutex); 1071 return ret; 1072 } 1073 } 1074 1075 mutex_unlock(&info->mutex); 1076 1077 return 0; 1078 } 1079 1080 static void max77693_muic_detect_cable_wq(struct work_struct *work) 1081 { 1082 struct max77693_muic_info *info = container_of(to_delayed_work(work), 1083 struct max77693_muic_info, wq_detcable); 1084 1085 max77693_muic_detect_accessory(info); 1086 } 1087 1088 static int max77693_muic_probe(struct platform_device *pdev) 1089 { 1090 struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent); 1091 struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev); 1092 struct max77693_muic_info *info; 1093 struct max77693_reg_data *init_data; 1094 int num_init_data; 1095 int delay_jiffies; 1096 int ret; 1097 int i; 1098 u8 id; 1099 1100 info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info), 1101 GFP_KERNEL); 1102 if (!info) { 1103 dev_err(&pdev->dev, "failed to allocate memory\n"); 1104 return -ENOMEM; 1105 } 1106 info->dev = &pdev->dev; 1107 info->max77693 = max77693; 1108 if (info->max77693->regmap_muic) { 1109 dev_dbg(&pdev->dev, "allocate register map\n"); 1110 } else { 1111 info->max77693->regmap_muic = devm_regmap_init_i2c( 1112 info->max77693->muic, 1113 &max77693_muic_regmap_config); 1114 if (IS_ERR(info->max77693->regmap_muic)) { 1115 ret = PTR_ERR(info->max77693->regmap_muic); 1116 dev_err(max77693->dev, 1117 "failed to allocate register map: %d\n", ret); 1118 return ret; 1119 } 1120 } 1121 1122 /* Register input device for button of dock device */ 1123 info->dock = devm_input_allocate_device(&pdev->dev); 1124 if (!info->dock) { 1125 dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__); 1126 return -ENOMEM; 1127 } 1128 info->dock->name = "max77693-muic/dock"; 1129 info->dock->phys = "max77693-muic/extcon"; 1130 info->dock->dev.parent = &pdev->dev; 1131 1132 __set_bit(EV_REP, info->dock->evbit); 1133 1134 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP); 1135 input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN); 1136 input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE); 1137 input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG); 1138 input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG); 1139 1140 ret = input_register_device(info->dock); 1141 if (ret < 0) { 1142 dev_err(&pdev->dev, "Cannot register input device error(%d)\n", 1143 ret); 1144 return ret; 1145 } 1146 1147 platform_set_drvdata(pdev, info); 1148 mutex_init(&info->mutex); 1149 1150 INIT_WORK(&info->irq_work, max77693_muic_irq_work); 1151 1152 /* Support irq domain for MAX77693 MUIC device */ 1153 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { 1154 struct max77693_muic_irq *muic_irq = &muic_irqs[i]; 1155 unsigned int virq = 0; 1156 1157 virq = irq_create_mapping(max77693->irq_domain, muic_irq->irq); 1158 if (!virq) { 1159 ret = -EINVAL; 1160 goto err_irq; 1161 } 1162 muic_irq->virq = virq; 1163 1164 ret = request_threaded_irq(virq, NULL, 1165 max77693_muic_irq_handler, 1166 IRQF_NO_SUSPEND, 1167 muic_irq->name, info); 1168 if (ret) { 1169 dev_err(&pdev->dev, 1170 "failed: irq request (IRQ: %d," 1171 " error :%d)\n", 1172 muic_irq->irq, ret); 1173 goto err_irq; 1174 } 1175 } 1176 1177 /* Initialize extcon device */ 1178 info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev), 1179 GFP_KERNEL); 1180 if (!info->edev) { 1181 dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); 1182 ret = -ENOMEM; 1183 goto err_irq; 1184 } 1185 info->edev->name = DEV_NAME; 1186 info->edev->dev.parent = &pdev->dev; 1187 info->edev->supported_cable = max77693_extcon_cable; 1188 ret = extcon_dev_register(info->edev); 1189 if (ret) { 1190 dev_err(&pdev->dev, "failed to register extcon device\n"); 1191 goto err_irq; 1192 } 1193 1194 1195 /* Initialize MUIC register by using platform data or default data */ 1196 if (pdata->muic_data) { 1197 init_data = pdata->muic_data->init_data; 1198 num_init_data = pdata->muic_data->num_init_data; 1199 } else { 1200 init_data = default_init_data; 1201 num_init_data = ARRAY_SIZE(default_init_data); 1202 } 1203 1204 for (i = 0; i < num_init_data; i++) { 1205 enum max77693_irq_source irq_src 1206 = MAX77693_IRQ_GROUP_NR; 1207 1208 max77693_write_reg(info->max77693->regmap_muic, 1209 init_data[i].addr, 1210 init_data[i].data); 1211 1212 switch (init_data[i].addr) { 1213 case MAX77693_MUIC_REG_INTMASK1: 1214 irq_src = MUIC_INT1; 1215 break; 1216 case MAX77693_MUIC_REG_INTMASK2: 1217 irq_src = MUIC_INT2; 1218 break; 1219 case MAX77693_MUIC_REG_INTMASK3: 1220 irq_src = MUIC_INT3; 1221 break; 1222 } 1223 1224 if (irq_src < MAX77693_IRQ_GROUP_NR) 1225 info->max77693->irq_masks_cur[irq_src] 1226 = init_data[i].data; 1227 } 1228 1229 if (pdata->muic_data) { 1230 struct max77693_muic_platform_data *muic_pdata 1231 = pdata->muic_data; 1232 1233 /* 1234 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB 1235 * h/w path of COMP2/COMN1 on CONTROL1 register. 1236 */ 1237 if (muic_pdata->path_uart) 1238 info->path_uart = muic_pdata->path_uart; 1239 else 1240 info->path_uart = CONTROL1_SW_UART; 1241 1242 if (muic_pdata->path_usb) 1243 info->path_usb = muic_pdata->path_usb; 1244 else 1245 info->path_usb = CONTROL1_SW_USB; 1246 1247 /* 1248 * Default delay time for detecting cable state 1249 * after certain time. 1250 */ 1251 if (muic_pdata->detcable_delay_ms) 1252 delay_jiffies = 1253 msecs_to_jiffies(muic_pdata->detcable_delay_ms); 1254 else 1255 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); 1256 } else { 1257 info->path_usb = CONTROL1_SW_USB; 1258 info->path_uart = CONTROL1_SW_UART; 1259 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); 1260 } 1261 1262 /* Set initial path for UART */ 1263 max77693_muic_set_path(info, info->path_uart, true); 1264 1265 /* Check revision number of MUIC device*/ 1266 ret = max77693_read_reg(info->max77693->regmap_muic, 1267 MAX77693_MUIC_REG_ID, &id); 1268 if (ret < 0) { 1269 dev_err(&pdev->dev, "failed to read revision number\n"); 1270 goto err_extcon; 1271 } 1272 dev_info(info->dev, "device ID : 0x%x\n", id); 1273 1274 /* Set ADC debounce time */ 1275 max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); 1276 1277 /* 1278 * Detect accessory after completing the initialization of platform 1279 * 1280 * - Use delayed workqueue to detect cable state and then 1281 * notify cable state to notifiee/platform through uevent. 1282 * After completing the booting of platform, the extcon provider 1283 * driver should notify cable state to upper layer. 1284 */ 1285 INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq); 1286 schedule_delayed_work(&info->wq_detcable, delay_jiffies); 1287 1288 return ret; 1289 1290 err_extcon: 1291 extcon_dev_unregister(info->edev); 1292 err_irq: 1293 while (--i >= 0) 1294 free_irq(muic_irqs[i].virq, info); 1295 return ret; 1296 } 1297 1298 static int max77693_muic_remove(struct platform_device *pdev) 1299 { 1300 struct max77693_muic_info *info = platform_get_drvdata(pdev); 1301 int i; 1302 1303 for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) 1304 free_irq(muic_irqs[i].virq, info); 1305 cancel_work_sync(&info->irq_work); 1306 input_unregister_device(info->dock); 1307 extcon_dev_unregister(info->edev); 1308 1309 return 0; 1310 } 1311 1312 static struct platform_driver max77693_muic_driver = { 1313 .driver = { 1314 .name = DEV_NAME, 1315 .owner = THIS_MODULE, 1316 }, 1317 .probe = max77693_muic_probe, 1318 .remove = max77693_muic_remove, 1319 }; 1320 1321 module_platform_driver(max77693_muic_driver); 1322 1323 MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver"); 1324 MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>"); 1325 MODULE_LICENSE("GPL"); 1326 MODULE_ALIAS("platform:extcon-max77693"); 1327