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