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