1// SPDX-License-Identifier: GPL-2.0+ 2// 3// extcon-max77843.c - Maxim MAX77843 extcon driver to support 4// MUIC(Micro USB Interface Controller) 5// 6// Copyright (C) 2015 Samsung Electronics 7// Author: Jaewon Kim <jaewon02.kim@samsung.com> 8 9#include <linux/extcon-provider.h> 10#include <linux/i2c.h> 11#include <linux/interrupt.h> 12#include <linux/kernel.h> 13#include <linux/mfd/max77693-common.h> 14#include <linux/mfd/max77843-private.h> 15#include <linux/module.h> 16#include <linux/platform_device.h> 17#include <linux/workqueue.h> 18 19#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ 20 21enum max77843_muic_status { 22 MAX77843_MUIC_STATUS1 = 0, 23 MAX77843_MUIC_STATUS2, 24 MAX77843_MUIC_STATUS3, 25 26 MAX77843_MUIC_STATUS_NUM, 27}; 28 29struct max77843_muic_info { 30 struct device *dev; 31 struct max77693_dev *max77843; 32 struct extcon_dev *edev; 33 34 struct mutex mutex; 35 struct work_struct irq_work; 36 struct delayed_work wq_detcable; 37 38 u8 status[MAX77843_MUIC_STATUS_NUM]; 39 int prev_cable_type; 40 int prev_chg_type; 41 int prev_gnd_type; 42 43 bool irq_adc; 44 bool irq_chg; 45}; 46 47enum max77843_muic_cable_group { 48 MAX77843_CABLE_GROUP_ADC = 0, 49 MAX77843_CABLE_GROUP_ADC_GND, 50 MAX77843_CABLE_GROUP_CHG, 51}; 52 53enum max77843_muic_adc_debounce_time { 54 MAX77843_DEBOUNCE_TIME_5MS = 0, 55 MAX77843_DEBOUNCE_TIME_10MS, 56 MAX77843_DEBOUNCE_TIME_25MS, 57 MAX77843_DEBOUNCE_TIME_38_62MS, 58}; 59 60/* Define accessory cable type */ 61enum max77843_muic_accessory_type { 62 MAX77843_MUIC_ADC_GROUND = 0, 63 MAX77843_MUIC_ADC_SEND_END_BUTTON, 64 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, 65 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, 66 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, 67 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, 68 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, 69 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, 70 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, 71 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, 72 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, 73 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, 74 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, 75 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, 76 MAX77843_MUIC_ADC_RESERVED_ACC_1, 77 MAX77843_MUIC_ADC_RESERVED_ACC_2, 78 MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */ 79 MAX77843_MUIC_ADC_RESERVED_ACC_4, 80 MAX77843_MUIC_ADC_RESERVED_ACC_5, 81 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, 82 MAX77843_MUIC_ADC_PHONE_POWERED_DEV, 83 MAX77843_MUIC_ADC_TTY_CONVERTER, 84 MAX77843_MUIC_ADC_UART_CABLE, 85 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, 86 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, 87 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, 88 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, 89 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, 90 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, 91 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, 92 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, 93 MAX77843_MUIC_ADC_OPEN, 94 95 /* 96 * The below accessories should check 97 * not only ADC value but also ADC1K and VBVolt value. 98 */ 99 /* Offset|ADC1K|VBVolt| */ 100 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ 101 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ 102 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ 103 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ 104}; 105 106/* Define charger cable type */ 107enum max77843_muic_charger_type { 108 MAX77843_MUIC_CHG_NONE = 0, 109 MAX77843_MUIC_CHG_USB, 110 MAX77843_MUIC_CHG_DOWNSTREAM, 111 MAX77843_MUIC_CHG_DEDICATED, 112 MAX77843_MUIC_CHG_SPECIAL_500MA, 113 MAX77843_MUIC_CHG_SPECIAL_1A, 114 MAX77843_MUIC_CHG_SPECIAL_BIAS, 115 MAX77843_MUIC_CHG_RESERVED, 116 MAX77843_MUIC_CHG_GND, 117 MAX77843_MUIC_CHG_DOCK, 118}; 119 120static const unsigned int max77843_extcon_cable[] = { 121 EXTCON_USB, 122 EXTCON_USB_HOST, 123 EXTCON_CHG_USB_SDP, 124 EXTCON_CHG_USB_DCP, 125 EXTCON_CHG_USB_CDP, 126 EXTCON_CHG_USB_FAST, 127 EXTCON_CHG_USB_SLOW, 128 EXTCON_DISP_MHL, 129 EXTCON_DOCK, 130 EXTCON_JIG, 131 EXTCON_NONE, 132}; 133 134struct max77843_muic_irq { 135 unsigned int irq; 136 const char *name; 137 unsigned int virq; 138}; 139 140static struct max77843_muic_irq max77843_muic_irqs[] = { 141 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, 142 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, 143 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, 144 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, 145 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, 146 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, 147 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, 148 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, 149 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, 150 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, 151 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, 152 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, 153 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, 154 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, 155 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, 156 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, 157}; 158 159static const struct regmap_config max77843_muic_regmap_config = { 160 .reg_bits = 8, 161 .val_bits = 8, 162 .max_register = MAX77843_MUIC_REG_END, 163}; 164 165static const struct regmap_irq max77843_muic_irq[] = { 166 /* INT1 interrupt */ 167 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, 168 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, 169 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, 170 171 /* INT2 interrupt */ 172 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, 173 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, 174 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, 175 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, 176 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, 177 178 /* INT3 interrupt */ 179 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, 180 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, 181 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, 182 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, 183 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, 184 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, 185 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, 186 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, 187}; 188 189static const struct regmap_irq_chip max77843_muic_irq_chip = { 190 .name = "max77843-muic", 191 .status_base = MAX77843_MUIC_REG_INT1, 192 .unmask_base = MAX77843_MUIC_REG_INTMASK1, 193 .num_regs = 3, 194 .irqs = max77843_muic_irq, 195 .num_irqs = ARRAY_SIZE(max77843_muic_irq), 196}; 197 198static int max77843_muic_set_path(struct max77843_muic_info *info, 199 u8 val, bool attached, bool nobccomp) 200{ 201 struct max77693_dev *max77843 = info->max77843; 202 int ret = 0; 203 unsigned int ctrl1, ctrl2; 204 205 if (attached) 206 ctrl1 = val; 207 else 208 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; 209 if (nobccomp) { 210 /* Disable BC1.2 protocol and force manual switch control */ 211 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK; 212 } 213 214 ret = regmap_update_bits(max77843->regmap_muic, 215 MAX77843_MUIC_REG_CONTROL1, 216 MAX77843_MUIC_CONTROL1_COM_SW | 217 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK, 218 ctrl1); 219 if (ret < 0) { 220 dev_err(info->dev, "Cannot switch MUIC port\n"); 221 return ret; 222 } 223 224 if (attached) 225 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; 226 else 227 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; 228 229 ret = regmap_update_bits(max77843->regmap_muic, 230 MAX77843_MUIC_REG_CONTROL2, 231 MAX77843_MUIC_CONTROL2_LOWPWR_MASK | 232 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); 233 if (ret < 0) { 234 dev_err(info->dev, "Cannot update lowpower mode\n"); 235 return ret; 236 } 237 238 dev_dbg(info->dev, 239 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 240 ctrl1, ctrl2, attached ? "attached" : "detached"); 241 242 return 0; 243} 244 245static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info, 246 bool on) 247{ 248 struct max77693_dev *max77843 = info->max77843; 249 unsigned int cnfg00; 250 251 if (on) 252 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK; 253 else 254 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK; 255 256 regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00, 257 MAX77843_CHG_MODE_MASK, cnfg00); 258} 259 260static int max77843_muic_get_cable_type(struct max77843_muic_info *info, 261 enum max77843_muic_cable_group group, bool *attached) 262{ 263 int adc, chg_type, cable_type, gnd_type; 264 265 adc = info->status[MAX77843_MUIC_STATUS1] & 266 MAX77843_MUIC_STATUS1_ADC_MASK; 267 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; 268 269 switch (group) { 270 case MAX77843_CABLE_GROUP_ADC: 271 if (adc == MAX77843_MUIC_ADC_OPEN) { 272 *attached = false; 273 cable_type = info->prev_cable_type; 274 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; 275 } else { 276 *attached = true; 277 cable_type = info->prev_cable_type = adc; 278 } 279 break; 280 case MAX77843_CABLE_GROUP_CHG: 281 chg_type = info->status[MAX77843_MUIC_STATUS2] & 282 MAX77843_MUIC_STATUS2_CHGTYP_MASK; 283 284 /* Check GROUND accessory with charger cable */ 285 if (adc == MAX77843_MUIC_ADC_GROUND) { 286 if (chg_type == MAX77843_MUIC_CHG_NONE) { 287 /* 288 * The following state when charger cable is 289 * disconnected but the GROUND accessory still 290 * connected. 291 */ 292 *attached = false; 293 cable_type = info->prev_chg_type; 294 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 295 } else { 296 297 /* 298 * The following state when charger cable is 299 * connected on the GROUND accessory. 300 */ 301 *attached = true; 302 cable_type = MAX77843_MUIC_CHG_GND; 303 info->prev_chg_type = MAX77843_MUIC_CHG_GND; 304 } 305 break; 306 } 307 308 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */ 309 if (chg_type == MAX77843_MUIC_CHG_NONE) { 310 *attached = false; 311 cable_type = info->prev_chg_type; 312 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 313 } else { 314 *attached = true; 315 cable_type = MAX77843_MUIC_CHG_DOCK; 316 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK; 317 } 318 break; 319 } 320 321 if (chg_type == MAX77843_MUIC_CHG_NONE) { 322 *attached = false; 323 cable_type = info->prev_chg_type; 324 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 325 } else { 326 *attached = true; 327 cable_type = info->prev_chg_type = chg_type; 328 } 329 break; 330 case MAX77843_CABLE_GROUP_ADC_GND: 331 if (adc == MAX77843_MUIC_ADC_OPEN) { 332 *attached = false; 333 cable_type = info->prev_gnd_type; 334 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; 335 } else { 336 *attached = true; 337 338 /* 339 * Offset|ADC1K|VBVolt| 340 * 0x1| 0| 0| USB-HOST 341 * 0x1| 0| 1| USB-HOST with VB 342 * 0x1| 1| 0| MHL 343 * 0x1| 1| 1| MHL with VB 344 */ 345 /* Get ADC1K register bit */ 346 gnd_type = (info->status[MAX77843_MUIC_STATUS1] & 347 MAX77843_MUIC_STATUS1_ADC1K_MASK); 348 349 /* Get VBVolt register bit */ 350 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & 351 MAX77843_MUIC_STATUS2_VBVOLT_MASK); 352 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; 353 354 /* Offset of GND cable */ 355 gnd_type |= MAX77843_MUIC_GND_USB_HOST; 356 cable_type = info->prev_gnd_type = gnd_type; 357 } 358 break; 359 default: 360 dev_err(info->dev, "Unknown cable group (%d)\n", group); 361 cable_type = -EINVAL; 362 break; 363 } 364 365 return cable_type; 366} 367 368static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) 369{ 370 int ret, gnd_cable_type; 371 bool attached; 372 373 gnd_cable_type = max77843_muic_get_cable_type(info, 374 MAX77843_CABLE_GROUP_ADC_GND, &attached); 375 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", 376 attached ? "attached" : "detached", gnd_cable_type); 377 378 switch (gnd_cable_type) { 379 case MAX77843_MUIC_GND_USB_HOST: 380 case MAX77843_MUIC_GND_USB_HOST_VB: 381 ret = max77843_muic_set_path(info, 382 MAX77843_MUIC_CONTROL1_SW_USB, 383 attached, false); 384 if (ret < 0) 385 return ret; 386 387 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); 388 max77843_charger_set_otg_vbus(info, attached); 389 break; 390 case MAX77843_MUIC_GND_MHL_VB: 391 case MAX77843_MUIC_GND_MHL: 392 ret = max77843_muic_set_path(info, 393 MAX77843_MUIC_CONTROL1_SW_OPEN, 394 attached, false); 395 if (ret < 0) 396 return ret; 397 398 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); 399 break; 400 default: 401 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", 402 attached ? "attached" : "detached", gnd_cable_type); 403 return -EINVAL; 404 } 405 406 return 0; 407} 408 409static int max77843_muic_jig_handler(struct max77843_muic_info *info, 410 int cable_type, bool attached) 411{ 412 int ret; 413 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; 414 415 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", 416 attached ? "attached" : "detached", cable_type); 417 418 switch (cable_type) { 419 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 420 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 421 path = MAX77843_MUIC_CONTROL1_SW_USB; 422 break; 423 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 424 path = MAX77843_MUIC_CONTROL1_SW_UART; 425 break; 426 default: 427 return -EINVAL; 428 } 429 430 ret = max77843_muic_set_path(info, path, attached, false); 431 if (ret < 0) 432 return ret; 433 434 extcon_set_state_sync(info->edev, EXTCON_JIG, attached); 435 436 return 0; 437} 438 439static int max77843_muic_dock_handler(struct max77843_muic_info *info, 440 bool attached) 441{ 442 int ret; 443 444 dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n", 445 attached ? "attached" : "detached"); 446 447 ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB, 448 attached, attached); 449 if (ret < 0) 450 return ret; 451 452 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); 453 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); 454 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); 455 456 return 0; 457} 458 459static int max77843_muic_adc_handler(struct max77843_muic_info *info) 460{ 461 int ret, cable_type; 462 bool attached; 463 464 cable_type = max77843_muic_get_cable_type(info, 465 MAX77843_CABLE_GROUP_ADC, &attached); 466 467 dev_dbg(info->dev, 468 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 469 attached ? "attached" : "detached", cable_type, 470 info->prev_cable_type); 471 472 switch (cable_type) { 473 case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */ 474 ret = max77843_muic_dock_handler(info, attached); 475 if (ret < 0) 476 return ret; 477 break; 478 case MAX77843_MUIC_ADC_GROUND: 479 ret = max77843_muic_adc_gnd_handler(info); 480 if (ret < 0) 481 return ret; 482 break; 483 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 484 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 485 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 486 ret = max77843_muic_jig_handler(info, cable_type, attached); 487 if (ret < 0) 488 return ret; 489 break; 490 case MAX77843_MUIC_ADC_SEND_END_BUTTON: 491 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: 492 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: 493 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: 494 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: 495 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: 496 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: 497 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: 498 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: 499 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: 500 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: 501 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: 502 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: 503 case MAX77843_MUIC_ADC_RESERVED_ACC_1: 504 case MAX77843_MUIC_ADC_RESERVED_ACC_2: 505 case MAX77843_MUIC_ADC_RESERVED_ACC_4: 506 case MAX77843_MUIC_ADC_RESERVED_ACC_5: 507 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: 508 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: 509 case MAX77843_MUIC_ADC_TTY_CONVERTER: 510 case MAX77843_MUIC_ADC_UART_CABLE: 511 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: 512 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: 513 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: 514 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: 515 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: 516 case MAX77843_MUIC_ADC_OPEN: 517 dev_err(info->dev, 518 "accessory is %s but it isn't used (adc:0x%x)\n", 519 attached ? "attached" : "detached", cable_type); 520 return -EAGAIN; 521 default: 522 dev_err(info->dev, 523 "failed to detect %s accessory (adc:0x%x)\n", 524 attached ? "attached" : "detached", cable_type); 525 return -EINVAL; 526 } 527 528 return 0; 529} 530 531static int max77843_muic_chg_handler(struct max77843_muic_info *info) 532{ 533 int ret, chg_type, gnd_type; 534 bool attached; 535 536 chg_type = max77843_muic_get_cable_type(info, 537 MAX77843_CABLE_GROUP_CHG, &attached); 538 539 dev_dbg(info->dev, 540 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 541 attached ? "attached" : "detached", 542 chg_type, info->prev_chg_type); 543 544 switch (chg_type) { 545 case MAX77843_MUIC_CHG_USB: 546 ret = max77843_muic_set_path(info, 547 MAX77843_MUIC_CONTROL1_SW_USB, 548 attached, false); 549 if (ret < 0) 550 return ret; 551 552 extcon_set_state_sync(info->edev, EXTCON_USB, attached); 553 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 554 attached); 555 break; 556 case MAX77843_MUIC_CHG_DOWNSTREAM: 557 ret = max77843_muic_set_path(info, 558 MAX77843_MUIC_CONTROL1_SW_OPEN, 559 attached, false); 560 if (ret < 0) 561 return ret; 562 563 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, 564 attached); 565 break; 566 case MAX77843_MUIC_CHG_DEDICATED: 567 ret = max77843_muic_set_path(info, 568 MAX77843_MUIC_CONTROL1_SW_OPEN, 569 attached, false); 570 if (ret < 0) 571 return ret; 572 573 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 574 attached); 575 break; 576 case MAX77843_MUIC_CHG_SPECIAL_500MA: 577 ret = max77843_muic_set_path(info, 578 MAX77843_MUIC_CONTROL1_SW_OPEN, 579 attached, false); 580 if (ret < 0) 581 return ret; 582 583 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, 584 attached); 585 break; 586 case MAX77843_MUIC_CHG_SPECIAL_1A: 587 ret = max77843_muic_set_path(info, 588 MAX77843_MUIC_CONTROL1_SW_OPEN, 589 attached, false); 590 if (ret < 0) 591 return ret; 592 593 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, 594 attached); 595 break; 596 case MAX77843_MUIC_CHG_GND: 597 gnd_type = max77843_muic_get_cable_type(info, 598 MAX77843_CABLE_GROUP_ADC_GND, &attached); 599 600 /* Charger cable on MHL accessory is attach or detach */ 601 if (gnd_type == MAX77843_MUIC_GND_MHL_VB) 602 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 603 true); 604 else if (gnd_type == MAX77843_MUIC_GND_MHL) 605 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 606 false); 607 break; 608 case MAX77843_MUIC_CHG_DOCK: 609 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); 610 break; 611 case MAX77843_MUIC_CHG_NONE: 612 break; 613 default: 614 dev_err(info->dev, 615 "failed to detect %s accessory (chg_type:0x%x)\n", 616 attached ? "attached" : "detached", chg_type); 617 618 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, 619 attached, false); 620 return -EINVAL; 621 } 622 623 return 0; 624} 625 626static void max77843_muic_irq_work(struct work_struct *work) 627{ 628 struct max77843_muic_info *info = container_of(work, 629 struct max77843_muic_info, irq_work); 630 struct max77693_dev *max77843 = info->max77843; 631 int ret = 0; 632 633 mutex_lock(&info->mutex); 634 635 ret = regmap_bulk_read(max77843->regmap_muic, 636 MAX77843_MUIC_REG_STATUS1, info->status, 637 MAX77843_MUIC_STATUS_NUM); 638 if (ret) { 639 dev_err(info->dev, "Cannot read STATUS registers\n"); 640 mutex_unlock(&info->mutex); 641 return; 642 } 643 644 if (info->irq_adc) { 645 ret = max77843_muic_adc_handler(info); 646 if (ret) 647 dev_err(info->dev, "Unknown cable type\n"); 648 info->irq_adc = false; 649 } 650 651 if (info->irq_chg) { 652 ret = max77843_muic_chg_handler(info); 653 if (ret) 654 dev_err(info->dev, "Unknown charger type\n"); 655 info->irq_chg = false; 656 } 657 658 mutex_unlock(&info->mutex); 659} 660 661static irqreturn_t max77843_muic_irq_handler(int irq, void *data) 662{ 663 struct max77843_muic_info *info = data; 664 int i, irq_type = -1; 665 666 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) 667 if (irq == max77843_muic_irqs[i].virq) 668 irq_type = max77843_muic_irqs[i].irq; 669 670 switch (irq_type) { 671 case MAX77843_MUIC_IRQ_INT1_ADC: 672 case MAX77843_MUIC_IRQ_INT1_ADCERROR: 673 case MAX77843_MUIC_IRQ_INT1_ADC1K: 674 info->irq_adc = true; 675 break; 676 case MAX77843_MUIC_IRQ_INT2_CHGTYP: 677 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: 678 case MAX77843_MUIC_IRQ_INT2_DCDTMR: 679 case MAX77843_MUIC_IRQ_INT2_DXOVP: 680 case MAX77843_MUIC_IRQ_INT2_VBVOLT: 681 info->irq_chg = true; 682 break; 683 case MAX77843_MUIC_IRQ_INT3_VBADC: 684 case MAX77843_MUIC_IRQ_INT3_VDNMON: 685 case MAX77843_MUIC_IRQ_INT3_DNRES: 686 case MAX77843_MUIC_IRQ_INT3_MPNACK: 687 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: 688 case MAX77843_MUIC_IRQ_INT3_MRXTRF: 689 case MAX77843_MUIC_IRQ_INT3_MRXPERR: 690 case MAX77843_MUIC_IRQ_INT3_MRXRDY: 691 break; 692 default: 693 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); 694 break; 695 } 696 697 schedule_work(&info->irq_work); 698 699 return IRQ_HANDLED; 700} 701 702static void max77843_muic_detect_cable_wq(struct work_struct *work) 703{ 704 struct max77843_muic_info *info = container_of(to_delayed_work(work), 705 struct max77843_muic_info, wq_detcable); 706 struct max77693_dev *max77843 = info->max77843; 707 int chg_type, adc, ret; 708 bool attached; 709 710 mutex_lock(&info->mutex); 711 712 ret = regmap_bulk_read(max77843->regmap_muic, 713 MAX77843_MUIC_REG_STATUS1, info->status, 714 MAX77843_MUIC_STATUS_NUM); 715 if (ret) { 716 dev_err(info->dev, "Cannot read STATUS registers\n"); 717 goto err_cable_wq; 718 } 719 720 adc = max77843_muic_get_cable_type(info, 721 MAX77843_CABLE_GROUP_ADC, &attached); 722 if (attached && adc != MAX77843_MUIC_ADC_OPEN) { 723 ret = max77843_muic_adc_handler(info); 724 if (ret < 0) { 725 dev_err(info->dev, "Cannot detect accessory\n"); 726 goto err_cable_wq; 727 } 728 } 729 730 chg_type = max77843_muic_get_cable_type(info, 731 MAX77843_CABLE_GROUP_CHG, &attached); 732 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { 733 ret = max77843_muic_chg_handler(info); 734 if (ret < 0) { 735 dev_err(info->dev, "Cannot detect charger accessory\n"); 736 goto err_cable_wq; 737 } 738 } 739 740err_cable_wq: 741 mutex_unlock(&info->mutex); 742} 743 744static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, 745 enum max77843_muic_adc_debounce_time time) 746{ 747 struct max77693_dev *max77843 = info->max77843; 748 int ret; 749 750 switch (time) { 751 case MAX77843_DEBOUNCE_TIME_5MS: 752 case MAX77843_DEBOUNCE_TIME_10MS: 753 case MAX77843_DEBOUNCE_TIME_25MS: 754 case MAX77843_DEBOUNCE_TIME_38_62MS: 755 ret = regmap_update_bits(max77843->regmap_muic, 756 MAX77843_MUIC_REG_CONTROL4, 757 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, 758 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); 759 if (ret < 0) { 760 dev_err(info->dev, "Cannot write MUIC regmap\n"); 761 return ret; 762 } 763 break; 764 default: 765 dev_err(info->dev, "Invalid ADC debounce time\n"); 766 return -EINVAL; 767 } 768 769 return 0; 770} 771 772static int max77843_init_muic_regmap(struct max77693_dev *max77843) 773{ 774 int ret; 775 776 max77843->i2c_muic = i2c_new_dummy_device(max77843->i2c->adapter, 777 I2C_ADDR_MUIC); 778 if (IS_ERR(max77843->i2c_muic)) { 779 dev_err(&max77843->i2c->dev, 780 "Cannot allocate I2C device for MUIC\n"); 781 return PTR_ERR(max77843->i2c_muic); 782 } 783 784 i2c_set_clientdata(max77843->i2c_muic, max77843); 785 786 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, 787 &max77843_muic_regmap_config); 788 if (IS_ERR(max77843->regmap_muic)) { 789 ret = PTR_ERR(max77843->regmap_muic); 790 goto err_muic_i2c; 791 } 792 793 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, 794 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, 795 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); 796 if (ret < 0) { 797 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); 798 goto err_muic_i2c; 799 } 800 801 return 0; 802 803err_muic_i2c: 804 i2c_unregister_device(max77843->i2c_muic); 805 806 return ret; 807} 808 809static int max77843_muic_probe(struct platform_device *pdev) 810{ 811 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); 812 struct max77843_muic_info *info; 813 unsigned int id; 814 int cable_type; 815 bool attached; 816 int i, ret; 817 818 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 819 if (!info) 820 return -ENOMEM; 821 822 info->dev = &pdev->dev; 823 info->max77843 = max77843; 824 825 platform_set_drvdata(pdev, info); 826 mutex_init(&info->mutex); 827 828 /* Initialize i2c and regmap */ 829 ret = max77843_init_muic_regmap(max77843); 830 if (ret) { 831 dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); 832 return ret; 833 } 834 835 /* Turn off auto detection configuration */ 836 ret = regmap_update_bits(max77843->regmap_muic, 837 MAX77843_MUIC_REG_CONTROL4, 838 MAX77843_MUIC_CONTROL4_USBAUTO_MASK | 839 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, 840 CONTROL4_AUTO_DISABLE); 841 842 /* Initialize extcon device */ 843 info->edev = devm_extcon_dev_allocate(&pdev->dev, 844 max77843_extcon_cable); 845 if (IS_ERR(info->edev)) { 846 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); 847 ret = PTR_ERR(info->edev); 848 goto err_muic_irq; 849 } 850 851 ret = devm_extcon_dev_register(&pdev->dev, info->edev); 852 if (ret) { 853 dev_err(&pdev->dev, "Failed to register extcon device\n"); 854 goto err_muic_irq; 855 } 856 857 /* Set ADC debounce time */ 858 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); 859 860 /* Set initial path for UART when JIG is connected to get serial logs */ 861 ret = regmap_bulk_read(max77843->regmap_muic, 862 MAX77843_MUIC_REG_STATUS1, info->status, 863 MAX77843_MUIC_STATUS_NUM); 864 if (ret) { 865 dev_err(info->dev, "Cannot read STATUS registers\n"); 866 goto err_muic_irq; 867 } 868 cable_type = max77843_muic_get_cable_type(info, MAX77843_CABLE_GROUP_ADC, 869 &attached); 870 if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF) 871 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, 872 true, false); 873 874 /* Check revision number of MUIC device */ 875 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); 876 if (ret < 0) { 877 dev_err(&pdev->dev, "Failed to read revision number\n"); 878 goto err_muic_irq; 879 } 880 dev_info(info->dev, "MUIC device ID : 0x%x\n", id); 881 882 /* Support virtual irq domain for max77843 MUIC device */ 883 INIT_WORK(&info->irq_work, max77843_muic_irq_work); 884 885 /* Clear IRQ bits before request IRQs */ 886 ret = regmap_bulk_read(max77843->regmap_muic, 887 MAX77843_MUIC_REG_INT1, info->status, 888 MAX77843_MUIC_STATUS_NUM); 889 if (ret) { 890 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); 891 goto err_muic_irq; 892 } 893 894 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { 895 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; 896 int virq = 0; 897 898 virq = regmap_irq_get_virq(max77843->irq_data_muic, 899 muic_irq->irq); 900 if (virq <= 0) { 901 ret = -EINVAL; 902 goto err_muic_irq; 903 } 904 muic_irq->virq = virq; 905 906 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, 907 max77843_muic_irq_handler, IRQF_NO_SUSPEND, 908 muic_irq->name, info); 909 if (ret) { 910 dev_err(&pdev->dev, 911 "Failed to request irq (IRQ: %d, error: %d)\n", 912 muic_irq->irq, ret); 913 goto err_muic_irq; 914 } 915 } 916 917 /* Detect accessory after completing the initialization of platform */ 918 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); 919 queue_delayed_work(system_power_efficient_wq, 920 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); 921 922 return 0; 923 924err_muic_irq: 925 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 926 i2c_unregister_device(max77843->i2c_muic); 927 928 return ret; 929} 930 931static int max77843_muic_remove(struct platform_device *pdev) 932{ 933 struct max77843_muic_info *info = platform_get_drvdata(pdev); 934 struct max77693_dev *max77843 = info->max77843; 935 936 cancel_work_sync(&info->irq_work); 937 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 938 i2c_unregister_device(max77843->i2c_muic); 939 940 return 0; 941} 942 943static const struct platform_device_id max77843_muic_id[] = { 944 { "max77843-muic", }, 945 { /* sentinel */ }, 946}; 947MODULE_DEVICE_TABLE(platform, max77843_muic_id); 948 949static const struct of_device_id of_max77843_muic_dt_match[] = { 950 { .compatible = "maxim,max77843-muic", }, 951 { /* sentinel */ }, 952}; 953MODULE_DEVICE_TABLE(of, of_max77843_muic_dt_match); 954 955static struct platform_driver max77843_muic_driver = { 956 .driver = { 957 .name = "max77843-muic", 958 .of_match_table = of_max77843_muic_dt_match, 959 }, 960 .probe = max77843_muic_probe, 961 .remove = max77843_muic_remove, 962 .id_table = max77843_muic_id, 963}; 964 965static int __init max77843_muic_init(void) 966{ 967 return platform_driver_register(&max77843_muic_driver); 968} 969subsys_initcall(max77843_muic_init); 970 971MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); 972MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); 973MODULE_LICENSE("GPL"); 974