1/* 2 * extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC 3 * 4 * Copyright (C) 2013,2014 Samsung Electronics 5 * Chanwoo Choi <cw00.choi@samsung.com> 6 * Krzysztof Kozlowski <k.kozlowski@samsung.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19#include <linux/kernel.h> 20#include <linux/module.h> 21#include <linux/i2c.h> 22#include <linux/interrupt.h> 23#include <linux/platform_device.h> 24#include <linux/mfd/max14577.h> 25#include <linux/mfd/max14577-private.h> 26#include <linux/extcon.h> 27 28#define DELAY_MS_DEFAULT 17000 /* unit: millisecond */ 29 30enum max14577_muic_adc_debounce_time { 31 ADC_DEBOUNCE_TIME_5MS = 0, 32 ADC_DEBOUNCE_TIME_10MS, 33 ADC_DEBOUNCE_TIME_25MS, 34 ADC_DEBOUNCE_TIME_38_62MS, 35}; 36 37enum max14577_muic_status { 38 MAX14577_MUIC_STATUS1 = 0, 39 MAX14577_MUIC_STATUS2 = 1, 40 MAX14577_MUIC_STATUS_END, 41}; 42 43/** 44 * struct max14577_muic_irq 45 * @irq: the index of irq list of MUIC device. 46 * @name: the name of irq. 47 * @virq: the virtual irq to use irq domain 48 */ 49struct max14577_muic_irq { 50 unsigned int irq; 51 const char *name; 52 unsigned int virq; 53}; 54 55static struct max14577_muic_irq max14577_muic_irqs[] = { 56 { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, 57 { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, 58 { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, 59 { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, 60 { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, 61 { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, 62 { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, 63 { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, 64}; 65 66static struct max14577_muic_irq max77836_muic_irqs[] = { 67 { MAX14577_IRQ_INT1_ADC, "muic-ADC" }, 68 { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" }, 69 { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" }, 70 { MAX77836_IRQ_INT1_ADC1K, "muic-ADC1K" }, 71 { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" }, 72 { MAX14577_IRQ_INT2_CHGDETRUN, "muic-CHGDETRUN" }, 73 { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" }, 74 { MAX14577_IRQ_INT2_DBCHG, "muic-DBCHG" }, 75 { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" }, 76 { MAX77836_IRQ_INT2_VIDRM, "muic-VIDRM" }, 77}; 78 79struct max14577_muic_info { 80 struct device *dev; 81 struct max14577 *max14577; 82 struct extcon_dev *edev; 83 int prev_cable_type; 84 int prev_chg_type; 85 u8 status[MAX14577_MUIC_STATUS_END]; 86 87 struct max14577_muic_irq *muic_irqs; 88 unsigned int muic_irqs_num; 89 bool irq_adc; 90 bool irq_chg; 91 struct work_struct irq_work; 92 struct mutex mutex; 93 94 /* 95 * Use delayed workqueue to detect cable state and then 96 * notify cable state to notifiee/platform through uevent. 97 * After completing the booting of platform, the extcon provider 98 * driver should notify cable state to upper layer. 99 */ 100 struct delayed_work wq_detcable; 101 102 /* 103 * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB 104 * h/w path of COMP2/COMN1 on CONTROL1 register. 105 */ 106 int path_usb; 107 int path_uart; 108}; 109 110enum max14577_muic_cable_group { 111 MAX14577_CABLE_GROUP_ADC = 0, 112 MAX14577_CABLE_GROUP_CHG, 113}; 114 115/* Define supported accessory type */ 116enum max14577_muic_acc_type { 117 MAX14577_MUIC_ADC_GROUND = 0x0, 118 MAX14577_MUIC_ADC_SEND_END_BUTTON, 119 MAX14577_MUIC_ADC_REMOTE_S1_BUTTON, 120 MAX14577_MUIC_ADC_REMOTE_S2_BUTTON, 121 MAX14577_MUIC_ADC_REMOTE_S3_BUTTON, 122 MAX14577_MUIC_ADC_REMOTE_S4_BUTTON, 123 MAX14577_MUIC_ADC_REMOTE_S5_BUTTON, 124 MAX14577_MUIC_ADC_REMOTE_S6_BUTTON, 125 MAX14577_MUIC_ADC_REMOTE_S7_BUTTON, 126 MAX14577_MUIC_ADC_REMOTE_S8_BUTTON, 127 MAX14577_MUIC_ADC_REMOTE_S9_BUTTON, 128 MAX14577_MUIC_ADC_REMOTE_S10_BUTTON, 129 MAX14577_MUIC_ADC_REMOTE_S11_BUTTON, 130 MAX14577_MUIC_ADC_REMOTE_S12_BUTTON, 131 MAX14577_MUIC_ADC_RESERVED_ACC_1, 132 MAX14577_MUIC_ADC_RESERVED_ACC_2, 133 MAX14577_MUIC_ADC_RESERVED_ACC_3, 134 MAX14577_MUIC_ADC_RESERVED_ACC_4, 135 MAX14577_MUIC_ADC_RESERVED_ACC_5, 136 MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2, 137 MAX14577_MUIC_ADC_PHONE_POWERED_DEV, 138 MAX14577_MUIC_ADC_TTY_CONVERTER, 139 MAX14577_MUIC_ADC_UART_CABLE, 140 MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG, 141 MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF, 142 MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON, 143 MAX14577_MUIC_ADC_AV_CABLE_NOLOAD, 144 MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG, 145 MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF, 146 MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON, 147 MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1, /* with Remote and Simple Ctrl */ 148 MAX14577_MUIC_ADC_OPEN, 149}; 150 151/* max14577 MUIC device support below list of accessories(external connector) */ 152enum { 153 EXTCON_CABLE_USB = 0, 154 EXTCON_CABLE_TA, 155 EXTCON_CABLE_FAST_CHARGER, 156 EXTCON_CABLE_SLOW_CHARGER, 157 EXTCON_CABLE_CHARGE_DOWNSTREAM, 158 EXTCON_CABLE_JIG_USB_ON, 159 EXTCON_CABLE_JIG_USB_OFF, 160 EXTCON_CABLE_JIG_UART_OFF, 161 EXTCON_CABLE_JIG_UART_ON, 162 163 _EXTCON_CABLE_NUM, 164}; 165 166static const char *max14577_extcon_cable[] = { 167 [EXTCON_CABLE_USB] = "USB", 168 [EXTCON_CABLE_TA] = "TA", 169 [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger", 170 [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger", 171 [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream", 172 [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON", 173 [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF", 174 [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF", 175 [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON", 176 177 NULL, 178}; 179 180/* 181 * max14577_muic_set_debounce_time - Set the debounce time of ADC 182 * @info: the instance including private data of max14577 MUIC 183 * @time: the debounce time of ADC 184 */ 185static int max14577_muic_set_debounce_time(struct max14577_muic_info *info, 186 enum max14577_muic_adc_debounce_time time) 187{ 188 u8 ret; 189 190 switch (time) { 191 case ADC_DEBOUNCE_TIME_5MS: 192 case ADC_DEBOUNCE_TIME_10MS: 193 case ADC_DEBOUNCE_TIME_25MS: 194 case ADC_DEBOUNCE_TIME_38_62MS: 195 ret = max14577_update_reg(info->max14577->regmap, 196 MAX14577_MUIC_REG_CONTROL3, 197 CTRL3_ADCDBSET_MASK, 198 time << CTRL3_ADCDBSET_SHIFT); 199 if (ret) { 200 dev_err(info->dev, "failed to set ADC debounce time\n"); 201 return ret; 202 } 203 break; 204 default: 205 dev_err(info->dev, "invalid ADC debounce time\n"); 206 return -EINVAL; 207 } 208 209 return 0; 210}; 211 212/* 213 * max14577_muic_set_path - Set hardware line according to attached cable 214 * @info: the instance including private data of max14577 MUIC 215 * @value: the path according to attached cable 216 * @attached: the state of cable (true:attached, false:detached) 217 * 218 * The max14577 MUIC device share outside H/W line among a varity of cables 219 * so, this function set internal path of H/W line according to the type of 220 * attached cable. 221 */ 222static int max14577_muic_set_path(struct max14577_muic_info *info, 223 u8 val, bool attached) 224{ 225 int ret = 0; 226 u8 ctrl1, ctrl2 = 0; 227 228 /* Set open state to path before changing hw path */ 229 ret = max14577_update_reg(info->max14577->regmap, 230 MAX14577_MUIC_REG_CONTROL1, 231 CLEAR_IDBEN_MICEN_MASK, CTRL1_SW_OPEN); 232 if (ret < 0) { 233 dev_err(info->dev, "failed to update MUIC register\n"); 234 return ret; 235 } 236 237 if (attached) 238 ctrl1 = val; 239 else 240 ctrl1 = CTRL1_SW_OPEN; 241 242 ret = max14577_update_reg(info->max14577->regmap, 243 MAX14577_MUIC_REG_CONTROL1, 244 CLEAR_IDBEN_MICEN_MASK, ctrl1); 245 if (ret < 0) { 246 dev_err(info->dev, "failed to update MUIC register\n"); 247 return ret; 248 } 249 250 if (attached) 251 ctrl2 |= CTRL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ 252 else 253 ctrl2 |= CTRL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ 254 255 ret = max14577_update_reg(info->max14577->regmap, 256 MAX14577_REG_CONTROL2, 257 CTRL2_LOWPWR_MASK | CTRL2_CPEN_MASK, ctrl2); 258 if (ret < 0) { 259 dev_err(info->dev, "failed to update MUIC register\n"); 260 return ret; 261 } 262 263 dev_dbg(info->dev, 264 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 265 ctrl1, ctrl2, attached ? "attached" : "detached"); 266 267 return 0; 268} 269 270/* 271 * max14577_muic_get_cable_type - Return cable type and check cable state 272 * @info: the instance including private data of max14577 MUIC 273 * @group: the path according to attached cable 274 * @attached: store cable state and return 275 * 276 * This function check the cable state either attached or detached, 277 * and then divide precise type of cable according to cable group. 278 * - max14577_CABLE_GROUP_ADC 279 * - max14577_CABLE_GROUP_CHG 280 */ 281static int max14577_muic_get_cable_type(struct max14577_muic_info *info, 282 enum max14577_muic_cable_group group, bool *attached) 283{ 284 int cable_type = 0; 285 int adc; 286 int chg_type; 287 288 switch (group) { 289 case MAX14577_CABLE_GROUP_ADC: 290 /* 291 * Read ADC value to check cable type and decide cable state 292 * according to cable type 293 */ 294 adc = info->status[MAX14577_MUIC_STATUS1] & STATUS1_ADC_MASK; 295 adc >>= STATUS1_ADC_SHIFT; 296 297 /* 298 * Check current cable state/cable type and store cable type 299 * (info->prev_cable_type) for handling cable when cable is 300 * detached. 301 */ 302 if (adc == MAX14577_MUIC_ADC_OPEN) { 303 *attached = false; 304 305 cable_type = info->prev_cable_type; 306 info->prev_cable_type = MAX14577_MUIC_ADC_OPEN; 307 } else { 308 *attached = true; 309 310 cable_type = info->prev_cable_type = adc; 311 } 312 break; 313 case MAX14577_CABLE_GROUP_CHG: 314 /* 315 * Read charger type to check cable type and decide cable state 316 * according to type of charger cable. 317 */ 318 chg_type = info->status[MAX14577_MUIC_STATUS2] & 319 STATUS2_CHGTYP_MASK; 320 chg_type >>= STATUS2_CHGTYP_SHIFT; 321 322 if (chg_type == MAX14577_CHARGER_TYPE_NONE) { 323 *attached = false; 324 325 cable_type = info->prev_chg_type; 326 info->prev_chg_type = MAX14577_CHARGER_TYPE_NONE; 327 } else { 328 *attached = true; 329 330 /* 331 * Check current cable state/cable type and store cable 332 * type(info->prev_chg_type) for handling cable when 333 * charger cable is detached. 334 */ 335 cable_type = info->prev_chg_type = chg_type; 336 } 337 338 break; 339 default: 340 dev_err(info->dev, "Unknown cable group (%d)\n", group); 341 cable_type = -EINVAL; 342 break; 343 } 344 345 return cable_type; 346} 347 348static int max14577_muic_jig_handler(struct max14577_muic_info *info, 349 int cable_type, bool attached) 350{ 351 char cable_name[32]; 352 int ret = 0; 353 u8 path = CTRL1_SW_OPEN; 354 355 dev_dbg(info->dev, 356 "external connector is %s (adc:0x%02x)\n", 357 attached ? "attached" : "detached", cable_type); 358 359 switch (cable_type) { 360 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */ 361 /* PATH:AP_USB */ 362 strcpy(cable_name, "JIG-USB-OFF"); 363 path = CTRL1_SW_USB; 364 break; 365 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */ 366 /* PATH:AP_USB */ 367 strcpy(cable_name, "JIG-USB-ON"); 368 path = CTRL1_SW_USB; 369 break; 370 case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */ 371 /* PATH:AP_UART */ 372 strcpy(cable_name, "JIG-UART-OFF"); 373 path = CTRL1_SW_UART; 374 break; 375 default: 376 dev_err(info->dev, "failed to detect %s jig cable\n", 377 attached ? "attached" : "detached"); 378 return -EINVAL; 379 } 380 381 ret = max14577_muic_set_path(info, path, attached); 382 if (ret < 0) 383 return ret; 384 385 extcon_set_cable_state(info->edev, cable_name, attached); 386 387 return 0; 388} 389 390static int max14577_muic_adc_handler(struct max14577_muic_info *info) 391{ 392 int cable_type; 393 bool attached; 394 int ret = 0; 395 396 /* Check accessory state which is either detached or attached */ 397 cable_type = max14577_muic_get_cable_type(info, 398 MAX14577_CABLE_GROUP_ADC, &attached); 399 400 dev_dbg(info->dev, 401 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 402 attached ? "attached" : "detached", cable_type, 403 info->prev_cable_type); 404 405 switch (cable_type) { 406 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_OFF: 407 case MAX14577_MUIC_ADC_FACTORY_MODE_USB_ON: 408 case MAX14577_MUIC_ADC_FACTORY_MODE_UART_OFF: 409 /* JIG */ 410 ret = max14577_muic_jig_handler(info, cable_type, attached); 411 if (ret < 0) 412 return ret; 413 break; 414 case MAX14577_MUIC_ADC_GROUND: 415 case MAX14577_MUIC_ADC_SEND_END_BUTTON: 416 case MAX14577_MUIC_ADC_REMOTE_S1_BUTTON: 417 case MAX14577_MUIC_ADC_REMOTE_S2_BUTTON: 418 case MAX14577_MUIC_ADC_REMOTE_S3_BUTTON: 419 case MAX14577_MUIC_ADC_REMOTE_S4_BUTTON: 420 case MAX14577_MUIC_ADC_REMOTE_S5_BUTTON: 421 case MAX14577_MUIC_ADC_REMOTE_S6_BUTTON: 422 case MAX14577_MUIC_ADC_REMOTE_S7_BUTTON: 423 case MAX14577_MUIC_ADC_REMOTE_S8_BUTTON: 424 case MAX14577_MUIC_ADC_REMOTE_S9_BUTTON: 425 case MAX14577_MUIC_ADC_REMOTE_S10_BUTTON: 426 case MAX14577_MUIC_ADC_REMOTE_S11_BUTTON: 427 case MAX14577_MUIC_ADC_REMOTE_S12_BUTTON: 428 case MAX14577_MUIC_ADC_RESERVED_ACC_1: 429 case MAX14577_MUIC_ADC_RESERVED_ACC_2: 430 case MAX14577_MUIC_ADC_RESERVED_ACC_3: 431 case MAX14577_MUIC_ADC_RESERVED_ACC_4: 432 case MAX14577_MUIC_ADC_RESERVED_ACC_5: 433 case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE2: 434 case MAX14577_MUIC_ADC_PHONE_POWERED_DEV: 435 case MAX14577_MUIC_ADC_TTY_CONVERTER: 436 case MAX14577_MUIC_ADC_UART_CABLE: 437 case MAX14577_MUIC_ADC_CEA936A_TYPE1_CHG: 438 case MAX14577_MUIC_ADC_AV_CABLE_NOLOAD: 439 case MAX14577_MUIC_ADC_CEA936A_TYPE2_CHG: 440 case MAX14577_MUIC_ADC_FACTORY_MODE_UART_ON: 441 case MAX14577_MUIC_ADC_AUDIO_DEVICE_TYPE1: 442 /* 443 * This accessory isn't used in general case if it is specially 444 * needed to detect additional accessory, should implement 445 * proper operation when this accessory is attached/detached. 446 */ 447 dev_info(info->dev, 448 "accessory is %s but it isn't used (adc:0x%x)\n", 449 attached ? "attached" : "detached", cable_type); 450 return -EAGAIN; 451 default: 452 dev_err(info->dev, 453 "failed to detect %s accessory (adc:0x%x)\n", 454 attached ? "attached" : "detached", cable_type); 455 return -EINVAL; 456 } 457 458 return 0; 459} 460 461static int max14577_muic_chg_handler(struct max14577_muic_info *info) 462{ 463 int chg_type; 464 bool attached; 465 int ret = 0; 466 467 chg_type = max14577_muic_get_cable_type(info, 468 MAX14577_CABLE_GROUP_CHG, &attached); 469 470 dev_dbg(info->dev, 471 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 472 attached ? "attached" : "detached", 473 chg_type, info->prev_chg_type); 474 475 switch (chg_type) { 476 case MAX14577_CHARGER_TYPE_USB: 477 /* PATH:AP_USB */ 478 ret = max14577_muic_set_path(info, info->path_usb, attached); 479 if (ret < 0) 480 return ret; 481 482 extcon_set_cable_state(info->edev, "USB", attached); 483 break; 484 case MAX14577_CHARGER_TYPE_DEDICATED_CHG: 485 extcon_set_cable_state(info->edev, "TA", attached); 486 break; 487 case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT: 488 extcon_set_cable_state(info->edev, 489 "Charge-downstream", attached); 490 break; 491 case MAX14577_CHARGER_TYPE_SPECIAL_500MA: 492 extcon_set_cable_state(info->edev, "Slow-charger", attached); 493 break; 494 case MAX14577_CHARGER_TYPE_SPECIAL_1A: 495 extcon_set_cable_state(info->edev, "Fast-charger", attached); 496 break; 497 case MAX14577_CHARGER_TYPE_NONE: 498 case MAX14577_CHARGER_TYPE_DEAD_BATTERY: 499 break; 500 default: 501 dev_err(info->dev, 502 "failed to detect %s accessory (chg_type:0x%x)\n", 503 attached ? "attached" : "detached", chg_type); 504 return -EINVAL; 505 } 506 507 return 0; 508} 509 510static void max14577_muic_irq_work(struct work_struct *work) 511{ 512 struct max14577_muic_info *info = container_of(work, 513 struct max14577_muic_info, irq_work); 514 int ret = 0; 515 516 if (!info->edev) 517 return; 518 519 mutex_lock(&info->mutex); 520 521 ret = max14577_bulk_read(info->max14577->regmap, 522 MAX14577_MUIC_REG_STATUS1, info->status, 2); 523 if (ret) { 524 dev_err(info->dev, "failed to read MUIC register\n"); 525 mutex_unlock(&info->mutex); 526 return; 527 } 528 529 if (info->irq_adc) { 530 ret = max14577_muic_adc_handler(info); 531 info->irq_adc = false; 532 } 533 if (info->irq_chg) { 534 ret = max14577_muic_chg_handler(info); 535 info->irq_chg = false; 536 } 537 538 if (ret < 0) 539 dev_err(info->dev, "failed to handle MUIC interrupt\n"); 540 541 mutex_unlock(&info->mutex); 542} 543 544/* 545 * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. 546 * Returns 0 if irq_type does not match registered IRQ for this device type. 547 */ 548static int max14577_parse_irq(struct max14577_muic_info *info, int irq_type) 549{ 550 switch (irq_type) { 551 case MAX14577_IRQ_INT1_ADC: 552 case MAX14577_IRQ_INT1_ADCLOW: 553 case MAX14577_IRQ_INT1_ADCERR: 554 /* Handle all of accessory except for 555 type of charger accessory */ 556 info->irq_adc = true; 557 return 1; 558 case MAX14577_IRQ_INT2_CHGTYP: 559 case MAX14577_IRQ_INT2_CHGDETRUN: 560 case MAX14577_IRQ_INT2_DCDTMR: 561 case MAX14577_IRQ_INT2_DBCHG: 562 case MAX14577_IRQ_INT2_VBVOLT: 563 /* Handle charger accessory */ 564 info->irq_chg = true; 565 return 1; 566 default: 567 return 0; 568 } 569} 570 571/* 572 * Sets irq_adc or irq_chg in max14577_muic_info and returns 1. 573 * Returns 0 if irq_type does not match registered IRQ for this device type. 574 */ 575static int max77836_parse_irq(struct max14577_muic_info *info, int irq_type) 576{ 577 /* First check common max14577 interrupts */ 578 if (max14577_parse_irq(info, irq_type)) 579 return 1; 580 581 switch (irq_type) { 582 case MAX77836_IRQ_INT1_ADC1K: 583 info->irq_adc = true; 584 return 1; 585 case MAX77836_IRQ_INT2_VIDRM: 586 /* Handle charger accessory */ 587 info->irq_chg = true; 588 return 1; 589 default: 590 return 0; 591 } 592} 593 594static irqreturn_t max14577_muic_irq_handler(int irq, void *data) 595{ 596 struct max14577_muic_info *info = data; 597 int i, irq_type = -1; 598 bool irq_parsed; 599 600 /* 601 * We may be called multiple times for different nested IRQ-s. 602 * Including changes in INT1_ADC and INT2_CGHTYP at once. 603 * However we only need to know whether it was ADC, charger 604 * or both interrupts so decode IRQ and turn on proper flags. 605 */ 606 for (i = 0; i < info->muic_irqs_num; i++) 607 if (irq == info->muic_irqs[i].virq) 608 irq_type = info->muic_irqs[i].irq; 609 610 switch (info->max14577->dev_type) { 611 case MAXIM_DEVICE_TYPE_MAX77836: 612 irq_parsed = max77836_parse_irq(info, irq_type); 613 break; 614 case MAXIM_DEVICE_TYPE_MAX14577: 615 default: 616 irq_parsed = max14577_parse_irq(info, irq_type); 617 break; 618 } 619 620 if (!irq_parsed) { 621 dev_err(info->dev, "muic interrupt: irq %d occurred, skipped\n", 622 irq_type); 623 return IRQ_HANDLED; 624 } 625 schedule_work(&info->irq_work); 626 627 return IRQ_HANDLED; 628} 629 630static int max14577_muic_detect_accessory(struct max14577_muic_info *info) 631{ 632 int ret = 0; 633 int adc; 634 int chg_type; 635 bool attached; 636 637 mutex_lock(&info->mutex); 638 639 /* Read STATUSx register to detect accessory */ 640 ret = max14577_bulk_read(info->max14577->regmap, 641 MAX14577_MUIC_REG_STATUS1, info->status, 2); 642 if (ret) { 643 dev_err(info->dev, "failed to read MUIC register\n"); 644 mutex_unlock(&info->mutex); 645 return ret; 646 } 647 648 adc = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_ADC, 649 &attached); 650 if (attached && adc != MAX14577_MUIC_ADC_OPEN) { 651 ret = max14577_muic_adc_handler(info); 652 if (ret < 0) { 653 dev_err(info->dev, "Cannot detect accessory\n"); 654 mutex_unlock(&info->mutex); 655 return ret; 656 } 657 } 658 659 chg_type = max14577_muic_get_cable_type(info, MAX14577_CABLE_GROUP_CHG, 660 &attached); 661 if (attached && chg_type != MAX14577_CHARGER_TYPE_NONE) { 662 ret = max14577_muic_chg_handler(info); 663 if (ret < 0) { 664 dev_err(info->dev, "Cannot detect charger accessory\n"); 665 mutex_unlock(&info->mutex); 666 return ret; 667 } 668 } 669 670 mutex_unlock(&info->mutex); 671 672 return 0; 673} 674 675static void max14577_muic_detect_cable_wq(struct work_struct *work) 676{ 677 struct max14577_muic_info *info = container_of(to_delayed_work(work), 678 struct max14577_muic_info, wq_detcable); 679 680 max14577_muic_detect_accessory(info); 681} 682 683static int max14577_muic_probe(struct platform_device *pdev) 684{ 685 struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent); 686 struct max14577_muic_info *info; 687 int delay_jiffies; 688 int ret; 689 int i; 690 u8 id; 691 692 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 693 if (!info) 694 return -ENOMEM; 695 696 info->dev = &pdev->dev; 697 info->max14577 = max14577; 698 699 platform_set_drvdata(pdev, info); 700 mutex_init(&info->mutex); 701 702 INIT_WORK(&info->irq_work, max14577_muic_irq_work); 703 704 switch (max14577->dev_type) { 705 case MAXIM_DEVICE_TYPE_MAX77836: 706 info->muic_irqs = max77836_muic_irqs; 707 info->muic_irqs_num = ARRAY_SIZE(max77836_muic_irqs); 708 break; 709 case MAXIM_DEVICE_TYPE_MAX14577: 710 default: 711 info->muic_irqs = max14577_muic_irqs; 712 info->muic_irqs_num = ARRAY_SIZE(max14577_muic_irqs); 713 } 714 715 /* Support irq domain for max14577 MUIC device */ 716 for (i = 0; i < info->muic_irqs_num; i++) { 717 struct max14577_muic_irq *muic_irq = &info->muic_irqs[i]; 718 unsigned int virq = 0; 719 720 virq = regmap_irq_get_virq(max14577->irq_data, muic_irq->irq); 721 if (virq <= 0) 722 return -EINVAL; 723 muic_irq->virq = virq; 724 725 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, 726 max14577_muic_irq_handler, 727 IRQF_NO_SUSPEND, 728 muic_irq->name, info); 729 if (ret) { 730 dev_err(&pdev->dev, 731 "failed: irq request (IRQ: %d, error :%d)\n", 732 muic_irq->irq, ret); 733 return ret; 734 } 735 } 736 737 /* Initialize extcon device */ 738 info->edev = devm_extcon_dev_allocate(&pdev->dev, 739 max14577_extcon_cable); 740 if (IS_ERR(info->edev)) { 741 dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); 742 return -ENOMEM; 743 } 744 745 info->edev->name = dev_name(&pdev->dev); 746 747 ret = devm_extcon_dev_register(&pdev->dev, info->edev); 748 if (ret) { 749 dev_err(&pdev->dev, "failed to register extcon device\n"); 750 return ret; 751 } 752 753 /* Default h/w line path */ 754 info->path_usb = CTRL1_SW_USB; 755 info->path_uart = CTRL1_SW_UART; 756 delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); 757 758 /* Set initial path for UART */ 759 max14577_muic_set_path(info, info->path_uart, true); 760 761 /* Check revision number of MUIC device*/ 762 ret = max14577_read_reg(info->max14577->regmap, 763 MAX14577_REG_DEVICEID, &id); 764 if (ret < 0) { 765 dev_err(&pdev->dev, "failed to read revision number\n"); 766 return ret; 767 } 768 dev_info(info->dev, "device ID : 0x%x\n", id); 769 770 /* Set ADC debounce time */ 771 max14577_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); 772 773 /* 774 * Detect accessory after completing the initialization of platform 775 * 776 * - Use delayed workqueue to detect cable state and then 777 * notify cable state to notifiee/platform through uevent. 778 * After completing the booting of platform, the extcon provider 779 * driver should notify cable state to upper layer. 780 */ 781 INIT_DELAYED_WORK(&info->wq_detcable, max14577_muic_detect_cable_wq); 782 queue_delayed_work(system_power_efficient_wq, &info->wq_detcable, 783 delay_jiffies); 784 785 return ret; 786} 787 788static int max14577_muic_remove(struct platform_device *pdev) 789{ 790 struct max14577_muic_info *info = platform_get_drvdata(pdev); 791 792 cancel_work_sync(&info->irq_work); 793 794 return 0; 795} 796 797static const struct platform_device_id max14577_muic_id[] = { 798 { "max14577-muic", MAXIM_DEVICE_TYPE_MAX14577, }, 799 { "max77836-muic", MAXIM_DEVICE_TYPE_MAX77836, }, 800 { } 801}; 802MODULE_DEVICE_TABLE(platform, max14577_muic_id); 803 804static struct platform_driver max14577_muic_driver = { 805 .driver = { 806 .name = "max14577-muic", 807 }, 808 .probe = max14577_muic_probe, 809 .remove = max14577_muic_remove, 810 .id_table = max14577_muic_id, 811}; 812 813module_platform_driver(max14577_muic_driver); 814 815MODULE_DESCRIPTION("Maxim 14577/77836 Extcon driver"); 816MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>, Krzysztof Kozlowski <k.kozlowski@samsung.com>"); 817MODULE_LICENSE("GPL"); 818MODULE_ALIAS("platform:extcon-max14577"); 819