1 /* 2 * extcon-max77843.c - Maxim MAX77843 extcon driver to support 3 * MUIC(Micro USB Interface Controller) 4 * 5 * Copyright (C) 2015 Samsung Electronics 6 * Author: Jaewon Kim <jaewon02.kim@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 14 #include <linux/extcon-provider.h> 15 #include <linux/i2c.h> 16 #include <linux/interrupt.h> 17 #include <linux/kernel.h> 18 #include <linux/mfd/max77693-common.h> 19 #include <linux/mfd/max77843-private.h> 20 #include <linux/module.h> 21 #include <linux/platform_device.h> 22 #include <linux/workqueue.h> 23 24 #define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ 25 26 enum max77843_muic_status { 27 MAX77843_MUIC_STATUS1 = 0, 28 MAX77843_MUIC_STATUS2, 29 MAX77843_MUIC_STATUS3, 30 31 MAX77843_MUIC_STATUS_NUM, 32 }; 33 34 struct max77843_muic_info { 35 struct device *dev; 36 struct max77693_dev *max77843; 37 struct extcon_dev *edev; 38 39 struct mutex mutex; 40 struct work_struct irq_work; 41 struct delayed_work wq_detcable; 42 43 u8 status[MAX77843_MUIC_STATUS_NUM]; 44 int prev_cable_type; 45 int prev_chg_type; 46 int prev_gnd_type; 47 48 bool irq_adc; 49 bool irq_chg; 50 }; 51 52 enum max77843_muic_cable_group { 53 MAX77843_CABLE_GROUP_ADC = 0, 54 MAX77843_CABLE_GROUP_ADC_GND, 55 MAX77843_CABLE_GROUP_CHG, 56 }; 57 58 enum max77843_muic_adc_debounce_time { 59 MAX77843_DEBOUNCE_TIME_5MS = 0, 60 MAX77843_DEBOUNCE_TIME_10MS, 61 MAX77843_DEBOUNCE_TIME_25MS, 62 MAX77843_DEBOUNCE_TIME_38_62MS, 63 }; 64 65 /* Define accessory cable type */ 66 enum max77843_muic_accessory_type { 67 MAX77843_MUIC_ADC_GROUND = 0, 68 MAX77843_MUIC_ADC_SEND_END_BUTTON, 69 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, 70 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, 71 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, 72 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, 73 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, 74 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, 75 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, 76 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, 77 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, 78 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, 79 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, 80 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, 81 MAX77843_MUIC_ADC_RESERVED_ACC_1, 82 MAX77843_MUIC_ADC_RESERVED_ACC_2, 83 MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */ 84 MAX77843_MUIC_ADC_RESERVED_ACC_4, 85 MAX77843_MUIC_ADC_RESERVED_ACC_5, 86 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, 87 MAX77843_MUIC_ADC_PHONE_POWERED_DEV, 88 MAX77843_MUIC_ADC_TTY_CONVERTER, 89 MAX77843_MUIC_ADC_UART_CABLE, 90 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, 91 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, 92 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, 93 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, 94 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, 95 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, 96 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, 97 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, 98 MAX77843_MUIC_ADC_OPEN, 99 100 /* 101 * The below accessories should check 102 * not only ADC value but also ADC1K and VBVolt value. 103 */ 104 /* Offset|ADC1K|VBVolt| */ 105 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ 106 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ 107 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ 108 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ 109 }; 110 111 /* Define charger cable type */ 112 enum max77843_muic_charger_type { 113 MAX77843_MUIC_CHG_NONE = 0, 114 MAX77843_MUIC_CHG_USB, 115 MAX77843_MUIC_CHG_DOWNSTREAM, 116 MAX77843_MUIC_CHG_DEDICATED, 117 MAX77843_MUIC_CHG_SPECIAL_500MA, 118 MAX77843_MUIC_CHG_SPECIAL_1A, 119 MAX77843_MUIC_CHG_SPECIAL_BIAS, 120 MAX77843_MUIC_CHG_RESERVED, 121 MAX77843_MUIC_CHG_GND, 122 MAX77843_MUIC_CHG_DOCK, 123 }; 124 125 static const unsigned int max77843_extcon_cable[] = { 126 EXTCON_USB, 127 EXTCON_USB_HOST, 128 EXTCON_CHG_USB_SDP, 129 EXTCON_CHG_USB_DCP, 130 EXTCON_CHG_USB_CDP, 131 EXTCON_CHG_USB_FAST, 132 EXTCON_CHG_USB_SLOW, 133 EXTCON_DISP_MHL, 134 EXTCON_DOCK, 135 EXTCON_JIG, 136 EXTCON_NONE, 137 }; 138 139 struct max77843_muic_irq { 140 unsigned int irq; 141 const char *name; 142 unsigned int virq; 143 }; 144 145 static struct max77843_muic_irq max77843_muic_irqs[] = { 146 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, 147 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, 148 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, 149 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, 150 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, 151 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, 152 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, 153 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, 154 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, 155 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, 156 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, 157 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, 158 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, 159 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, 160 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, 161 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, 162 }; 163 164 static const struct regmap_config max77843_muic_regmap_config = { 165 .reg_bits = 8, 166 .val_bits = 8, 167 .max_register = MAX77843_MUIC_REG_END, 168 }; 169 170 static const struct regmap_irq max77843_muic_irq[] = { 171 /* INT1 interrupt */ 172 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, 173 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, 174 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, 175 176 /* INT2 interrupt */ 177 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, 178 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, 179 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, 180 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, 181 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, 182 183 /* INT3 interrupt */ 184 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, 185 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, 186 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, 187 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, 188 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, 189 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, 190 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, 191 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, 192 }; 193 194 static const struct regmap_irq_chip max77843_muic_irq_chip = { 195 .name = "max77843-muic", 196 .status_base = MAX77843_MUIC_REG_INT1, 197 .mask_base = MAX77843_MUIC_REG_INTMASK1, 198 .mask_invert = true, 199 .num_regs = 3, 200 .irqs = max77843_muic_irq, 201 .num_irqs = ARRAY_SIZE(max77843_muic_irq), 202 }; 203 204 static int max77843_muic_set_path(struct max77843_muic_info *info, 205 u8 val, bool attached, bool nobccomp) 206 { 207 struct max77693_dev *max77843 = info->max77843; 208 int ret = 0; 209 unsigned int ctrl1, ctrl2; 210 211 if (attached) 212 ctrl1 = val; 213 else 214 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; 215 if (nobccomp) { 216 /* Disable BC1.2 protocol and force manual switch control */ 217 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK; 218 } 219 220 ret = regmap_update_bits(max77843->regmap_muic, 221 MAX77843_MUIC_REG_CONTROL1, 222 MAX77843_MUIC_CONTROL1_COM_SW | 223 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK, 224 ctrl1); 225 if (ret < 0) { 226 dev_err(info->dev, "Cannot switch MUIC port\n"); 227 return ret; 228 } 229 230 if (attached) 231 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; 232 else 233 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; 234 235 ret = regmap_update_bits(max77843->regmap_muic, 236 MAX77843_MUIC_REG_CONTROL2, 237 MAX77843_MUIC_CONTROL2_LOWPWR_MASK | 238 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); 239 if (ret < 0) { 240 dev_err(info->dev, "Cannot update lowpower mode\n"); 241 return ret; 242 } 243 244 dev_dbg(info->dev, 245 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 246 ctrl1, ctrl2, attached ? "attached" : "detached"); 247 248 return 0; 249 } 250 251 static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info, 252 bool on) 253 { 254 struct max77693_dev *max77843 = info->max77843; 255 unsigned int cnfg00; 256 257 if (on) 258 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK; 259 else 260 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK; 261 262 regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00, 263 MAX77843_CHG_MODE_MASK, cnfg00); 264 } 265 266 static int max77843_muic_get_cable_type(struct max77843_muic_info *info, 267 enum max77843_muic_cable_group group, bool *attached) 268 { 269 int adc, chg_type, cable_type, gnd_type; 270 271 adc = info->status[MAX77843_MUIC_STATUS1] & 272 MAX77843_MUIC_STATUS1_ADC_MASK; 273 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; 274 275 switch (group) { 276 case MAX77843_CABLE_GROUP_ADC: 277 if (adc == MAX77843_MUIC_ADC_OPEN) { 278 *attached = false; 279 cable_type = info->prev_cable_type; 280 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; 281 } else { 282 *attached = true; 283 cable_type = info->prev_cable_type = adc; 284 } 285 break; 286 case MAX77843_CABLE_GROUP_CHG: 287 chg_type = info->status[MAX77843_MUIC_STATUS2] & 288 MAX77843_MUIC_STATUS2_CHGTYP_MASK; 289 290 /* Check GROUND accessory with charger cable */ 291 if (adc == MAX77843_MUIC_ADC_GROUND) { 292 if (chg_type == MAX77843_MUIC_CHG_NONE) { 293 /* 294 * The following state when charger cable is 295 * disconnected but the GROUND accessory still 296 * connected. 297 */ 298 *attached = false; 299 cable_type = info->prev_chg_type; 300 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 301 } else { 302 303 /* 304 * The following state when charger cable is 305 * connected on the GROUND accessory. 306 */ 307 *attached = true; 308 cable_type = MAX77843_MUIC_CHG_GND; 309 info->prev_chg_type = MAX77843_MUIC_CHG_GND; 310 } 311 break; 312 } 313 314 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */ 315 if (chg_type == MAX77843_MUIC_CHG_NONE) { 316 *attached = false; 317 cable_type = info->prev_chg_type; 318 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 319 } else { 320 *attached = true; 321 cable_type = MAX77843_MUIC_CHG_DOCK; 322 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK; 323 } 324 break; 325 } 326 327 if (chg_type == MAX77843_MUIC_CHG_NONE) { 328 *attached = false; 329 cable_type = info->prev_chg_type; 330 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 331 } else { 332 *attached = true; 333 cable_type = info->prev_chg_type = chg_type; 334 } 335 break; 336 case MAX77843_CABLE_GROUP_ADC_GND: 337 if (adc == MAX77843_MUIC_ADC_OPEN) { 338 *attached = false; 339 cable_type = info->prev_gnd_type; 340 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; 341 } else { 342 *attached = true; 343 344 /* 345 * Offset|ADC1K|VBVolt| 346 * 0x1| 0| 0| USB-HOST 347 * 0x1| 0| 1| USB-HOST with VB 348 * 0x1| 1| 0| MHL 349 * 0x1| 1| 1| MHL with VB 350 */ 351 /* Get ADC1K register bit */ 352 gnd_type = (info->status[MAX77843_MUIC_STATUS1] & 353 MAX77843_MUIC_STATUS1_ADC1K_MASK); 354 355 /* Get VBVolt register bit */ 356 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & 357 MAX77843_MUIC_STATUS2_VBVOLT_MASK); 358 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; 359 360 /* Offset of GND cable */ 361 gnd_type |= MAX77843_MUIC_GND_USB_HOST; 362 cable_type = info->prev_gnd_type = gnd_type; 363 } 364 break; 365 default: 366 dev_err(info->dev, "Unknown cable group (%d)\n", group); 367 cable_type = -EINVAL; 368 break; 369 } 370 371 return cable_type; 372 } 373 374 static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) 375 { 376 int ret, gnd_cable_type; 377 bool attached; 378 379 gnd_cable_type = max77843_muic_get_cable_type(info, 380 MAX77843_CABLE_GROUP_ADC_GND, &attached); 381 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", 382 attached ? "attached" : "detached", gnd_cable_type); 383 384 switch (gnd_cable_type) { 385 case MAX77843_MUIC_GND_USB_HOST: 386 case MAX77843_MUIC_GND_USB_HOST_VB: 387 ret = max77843_muic_set_path(info, 388 MAX77843_MUIC_CONTROL1_SW_USB, 389 attached, false); 390 if (ret < 0) 391 return ret; 392 393 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); 394 max77843_charger_set_otg_vbus(info, attached); 395 break; 396 case MAX77843_MUIC_GND_MHL_VB: 397 case MAX77843_MUIC_GND_MHL: 398 ret = max77843_muic_set_path(info, 399 MAX77843_MUIC_CONTROL1_SW_OPEN, 400 attached, false); 401 if (ret < 0) 402 return ret; 403 404 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); 405 break; 406 default: 407 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", 408 attached ? "attached" : "detached", gnd_cable_type); 409 return -EINVAL; 410 } 411 412 return 0; 413 } 414 415 static int max77843_muic_jig_handler(struct max77843_muic_info *info, 416 int cable_type, bool attached) 417 { 418 int ret; 419 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; 420 421 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", 422 attached ? "attached" : "detached", cable_type); 423 424 switch (cable_type) { 425 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 426 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 427 path = MAX77843_MUIC_CONTROL1_SW_USB; 428 break; 429 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 430 path = MAX77843_MUIC_CONTROL1_SW_UART; 431 break; 432 default: 433 return -EINVAL; 434 } 435 436 ret = max77843_muic_set_path(info, path, attached, false); 437 if (ret < 0) 438 return ret; 439 440 extcon_set_state_sync(info->edev, EXTCON_JIG, attached); 441 442 return 0; 443 } 444 445 static int max77843_muic_dock_handler(struct max77843_muic_info *info, 446 bool attached) 447 { 448 int ret; 449 450 dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n", 451 attached ? "attached" : "detached"); 452 453 ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB, 454 attached, attached); 455 if (ret < 0) 456 return ret; 457 458 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); 459 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); 460 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); 461 462 return 0; 463 } 464 465 static int max77843_muic_adc_handler(struct max77843_muic_info *info) 466 { 467 int ret, cable_type; 468 bool attached; 469 470 cable_type = max77843_muic_get_cable_type(info, 471 MAX77843_CABLE_GROUP_ADC, &attached); 472 473 dev_dbg(info->dev, 474 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 475 attached ? "attached" : "detached", cable_type, 476 info->prev_cable_type); 477 478 switch (cable_type) { 479 case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */ 480 ret = max77843_muic_dock_handler(info, attached); 481 if (ret < 0) 482 return ret; 483 break; 484 case MAX77843_MUIC_ADC_GROUND: 485 ret = max77843_muic_adc_gnd_handler(info); 486 if (ret < 0) 487 return ret; 488 break; 489 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 490 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 491 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 492 ret = max77843_muic_jig_handler(info, cable_type, attached); 493 if (ret < 0) 494 return ret; 495 break; 496 case MAX77843_MUIC_ADC_SEND_END_BUTTON: 497 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: 498 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: 499 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: 500 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: 501 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: 502 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: 503 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: 504 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: 505 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: 506 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: 507 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: 508 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: 509 case MAX77843_MUIC_ADC_RESERVED_ACC_1: 510 case MAX77843_MUIC_ADC_RESERVED_ACC_2: 511 case MAX77843_MUIC_ADC_RESERVED_ACC_4: 512 case MAX77843_MUIC_ADC_RESERVED_ACC_5: 513 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: 514 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: 515 case MAX77843_MUIC_ADC_TTY_CONVERTER: 516 case MAX77843_MUIC_ADC_UART_CABLE: 517 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: 518 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: 519 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: 520 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: 521 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: 522 case MAX77843_MUIC_ADC_OPEN: 523 dev_err(info->dev, 524 "accessory is %s but it isn't used (adc:0x%x)\n", 525 attached ? "attached" : "detached", cable_type); 526 return -EAGAIN; 527 default: 528 dev_err(info->dev, 529 "failed to detect %s accessory (adc:0x%x)\n", 530 attached ? "attached" : "detached", cable_type); 531 return -EINVAL; 532 } 533 534 return 0; 535 } 536 537 static int max77843_muic_chg_handler(struct max77843_muic_info *info) 538 { 539 int ret, chg_type, gnd_type; 540 bool attached; 541 542 chg_type = max77843_muic_get_cable_type(info, 543 MAX77843_CABLE_GROUP_CHG, &attached); 544 545 dev_dbg(info->dev, 546 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 547 attached ? "attached" : "detached", 548 chg_type, info->prev_chg_type); 549 550 switch (chg_type) { 551 case MAX77843_MUIC_CHG_USB: 552 ret = max77843_muic_set_path(info, 553 MAX77843_MUIC_CONTROL1_SW_USB, 554 attached, false); 555 if (ret < 0) 556 return ret; 557 558 extcon_set_state_sync(info->edev, EXTCON_USB, attached); 559 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, 560 attached); 561 break; 562 case MAX77843_MUIC_CHG_DOWNSTREAM: 563 ret = max77843_muic_set_path(info, 564 MAX77843_MUIC_CONTROL1_SW_OPEN, 565 attached, false); 566 if (ret < 0) 567 return ret; 568 569 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, 570 attached); 571 break; 572 case MAX77843_MUIC_CHG_DEDICATED: 573 ret = max77843_muic_set_path(info, 574 MAX77843_MUIC_CONTROL1_SW_OPEN, 575 attached, false); 576 if (ret < 0) 577 return ret; 578 579 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 580 attached); 581 break; 582 case MAX77843_MUIC_CHG_SPECIAL_500MA: 583 ret = max77843_muic_set_path(info, 584 MAX77843_MUIC_CONTROL1_SW_OPEN, 585 attached, false); 586 if (ret < 0) 587 return ret; 588 589 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, 590 attached); 591 break; 592 case MAX77843_MUIC_CHG_SPECIAL_1A: 593 ret = max77843_muic_set_path(info, 594 MAX77843_MUIC_CONTROL1_SW_OPEN, 595 attached, false); 596 if (ret < 0) 597 return ret; 598 599 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, 600 attached); 601 break; 602 case MAX77843_MUIC_CHG_GND: 603 gnd_type = max77843_muic_get_cable_type(info, 604 MAX77843_CABLE_GROUP_ADC_GND, &attached); 605 606 /* Charger cable on MHL accessory is attach or detach */ 607 if (gnd_type == MAX77843_MUIC_GND_MHL_VB) 608 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 609 true); 610 else if (gnd_type == MAX77843_MUIC_GND_MHL) 611 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, 612 false); 613 break; 614 case MAX77843_MUIC_CHG_DOCK: 615 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); 616 break; 617 case MAX77843_MUIC_CHG_NONE: 618 break; 619 default: 620 dev_err(info->dev, 621 "failed to detect %s accessory (chg_type:0x%x)\n", 622 attached ? "attached" : "detached", chg_type); 623 624 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, 625 attached, false); 626 return -EINVAL; 627 } 628 629 return 0; 630 } 631 632 static void max77843_muic_irq_work(struct work_struct *work) 633 { 634 struct max77843_muic_info *info = container_of(work, 635 struct max77843_muic_info, irq_work); 636 struct max77693_dev *max77843 = info->max77843; 637 int ret = 0; 638 639 mutex_lock(&info->mutex); 640 641 ret = regmap_bulk_read(max77843->regmap_muic, 642 MAX77843_MUIC_REG_STATUS1, info->status, 643 MAX77843_MUIC_STATUS_NUM); 644 if (ret) { 645 dev_err(info->dev, "Cannot read STATUS registers\n"); 646 mutex_unlock(&info->mutex); 647 return; 648 } 649 650 if (info->irq_adc) { 651 ret = max77843_muic_adc_handler(info); 652 if (ret) 653 dev_err(info->dev, "Unknown cable type\n"); 654 info->irq_adc = false; 655 } 656 657 if (info->irq_chg) { 658 ret = max77843_muic_chg_handler(info); 659 if (ret) 660 dev_err(info->dev, "Unknown charger type\n"); 661 info->irq_chg = false; 662 } 663 664 mutex_unlock(&info->mutex); 665 } 666 667 static irqreturn_t max77843_muic_irq_handler(int irq, void *data) 668 { 669 struct max77843_muic_info *info = data; 670 int i, irq_type = -1; 671 672 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) 673 if (irq == max77843_muic_irqs[i].virq) 674 irq_type = max77843_muic_irqs[i].irq; 675 676 switch (irq_type) { 677 case MAX77843_MUIC_IRQ_INT1_ADC: 678 case MAX77843_MUIC_IRQ_INT1_ADCERROR: 679 case MAX77843_MUIC_IRQ_INT1_ADC1K: 680 info->irq_adc = true; 681 break; 682 case MAX77843_MUIC_IRQ_INT2_CHGTYP: 683 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: 684 case MAX77843_MUIC_IRQ_INT2_DCDTMR: 685 case MAX77843_MUIC_IRQ_INT2_DXOVP: 686 case MAX77843_MUIC_IRQ_INT2_VBVOLT: 687 info->irq_chg = true; 688 break; 689 case MAX77843_MUIC_IRQ_INT3_VBADC: 690 case MAX77843_MUIC_IRQ_INT3_VDNMON: 691 case MAX77843_MUIC_IRQ_INT3_DNRES: 692 case MAX77843_MUIC_IRQ_INT3_MPNACK: 693 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: 694 case MAX77843_MUIC_IRQ_INT3_MRXTRF: 695 case MAX77843_MUIC_IRQ_INT3_MRXPERR: 696 case MAX77843_MUIC_IRQ_INT3_MRXRDY: 697 break; 698 default: 699 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); 700 break; 701 } 702 703 schedule_work(&info->irq_work); 704 705 return IRQ_HANDLED; 706 } 707 708 static void max77843_muic_detect_cable_wq(struct work_struct *work) 709 { 710 struct max77843_muic_info *info = container_of(to_delayed_work(work), 711 struct max77843_muic_info, wq_detcable); 712 struct max77693_dev *max77843 = info->max77843; 713 int chg_type, adc, ret; 714 bool attached; 715 716 mutex_lock(&info->mutex); 717 718 ret = regmap_bulk_read(max77843->regmap_muic, 719 MAX77843_MUIC_REG_STATUS1, info->status, 720 MAX77843_MUIC_STATUS_NUM); 721 if (ret) { 722 dev_err(info->dev, "Cannot read STATUS registers\n"); 723 goto err_cable_wq; 724 } 725 726 adc = max77843_muic_get_cable_type(info, 727 MAX77843_CABLE_GROUP_ADC, &attached); 728 if (attached && adc != MAX77843_MUIC_ADC_OPEN) { 729 ret = max77843_muic_adc_handler(info); 730 if (ret < 0) { 731 dev_err(info->dev, "Cannot detect accessory\n"); 732 goto err_cable_wq; 733 } 734 } 735 736 chg_type = max77843_muic_get_cable_type(info, 737 MAX77843_CABLE_GROUP_CHG, &attached); 738 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { 739 ret = max77843_muic_chg_handler(info); 740 if (ret < 0) { 741 dev_err(info->dev, "Cannot detect charger accessory\n"); 742 goto err_cable_wq; 743 } 744 } 745 746 err_cable_wq: 747 mutex_unlock(&info->mutex); 748 } 749 750 static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, 751 enum max77843_muic_adc_debounce_time time) 752 { 753 struct max77693_dev *max77843 = info->max77843; 754 int ret; 755 756 switch (time) { 757 case MAX77843_DEBOUNCE_TIME_5MS: 758 case MAX77843_DEBOUNCE_TIME_10MS: 759 case MAX77843_DEBOUNCE_TIME_25MS: 760 case MAX77843_DEBOUNCE_TIME_38_62MS: 761 ret = regmap_update_bits(max77843->regmap_muic, 762 MAX77843_MUIC_REG_CONTROL4, 763 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, 764 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); 765 if (ret < 0) { 766 dev_err(info->dev, "Cannot write MUIC regmap\n"); 767 return ret; 768 } 769 break; 770 default: 771 dev_err(info->dev, "Invalid ADC debounce time\n"); 772 return -EINVAL; 773 } 774 775 return 0; 776 } 777 778 static int max77843_init_muic_regmap(struct max77693_dev *max77843) 779 { 780 int ret; 781 782 max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, 783 I2C_ADDR_MUIC); 784 if (!max77843->i2c_muic) { 785 dev_err(&max77843->i2c->dev, 786 "Cannot allocate I2C device for MUIC\n"); 787 return -ENOMEM; 788 } 789 790 i2c_set_clientdata(max77843->i2c_muic, max77843); 791 792 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, 793 &max77843_muic_regmap_config); 794 if (IS_ERR(max77843->regmap_muic)) { 795 ret = PTR_ERR(max77843->regmap_muic); 796 goto err_muic_i2c; 797 } 798 799 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, 800 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, 801 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); 802 if (ret < 0) { 803 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); 804 goto err_muic_i2c; 805 } 806 807 return 0; 808 809 err_muic_i2c: 810 i2c_unregister_device(max77843->i2c_muic); 811 812 return ret; 813 } 814 815 static int max77843_muic_probe(struct platform_device *pdev) 816 { 817 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); 818 struct max77843_muic_info *info; 819 unsigned int id; 820 int i, ret; 821 822 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 823 if (!info) 824 return -ENOMEM; 825 826 info->dev = &pdev->dev; 827 info->max77843 = max77843; 828 829 platform_set_drvdata(pdev, info); 830 mutex_init(&info->mutex); 831 832 /* Initialize i2c and regmap */ 833 ret = max77843_init_muic_regmap(max77843); 834 if (ret) { 835 dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); 836 return ret; 837 } 838 839 /* Turn off auto detection configuration */ 840 ret = regmap_update_bits(max77843->regmap_muic, 841 MAX77843_MUIC_REG_CONTROL4, 842 MAX77843_MUIC_CONTROL4_USBAUTO_MASK | 843 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, 844 CONTROL4_AUTO_DISABLE); 845 846 /* Initialize extcon device */ 847 info->edev = devm_extcon_dev_allocate(&pdev->dev, 848 max77843_extcon_cable); 849 if (IS_ERR(info->edev)) { 850 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); 851 ret = -ENODEV; 852 goto err_muic_irq; 853 } 854 855 ret = devm_extcon_dev_register(&pdev->dev, info->edev); 856 if (ret) { 857 dev_err(&pdev->dev, "Failed to register extcon device\n"); 858 goto err_muic_irq; 859 } 860 861 /* Set ADC debounce time */ 862 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); 863 864 /* Set initial path for UART */ 865 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true, 866 false); 867 868 /* Check revision number of MUIC device */ 869 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); 870 if (ret < 0) { 871 dev_err(&pdev->dev, "Failed to read revision number\n"); 872 goto err_muic_irq; 873 } 874 dev_info(info->dev, "MUIC device ID : 0x%x\n", id); 875 876 /* Support virtual irq domain for max77843 MUIC device */ 877 INIT_WORK(&info->irq_work, max77843_muic_irq_work); 878 879 /* Clear IRQ bits before request IRQs */ 880 ret = regmap_bulk_read(max77843->regmap_muic, 881 MAX77843_MUIC_REG_INT1, info->status, 882 MAX77843_MUIC_STATUS_NUM); 883 if (ret) { 884 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); 885 goto err_muic_irq; 886 } 887 888 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { 889 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; 890 int virq = 0; 891 892 virq = regmap_irq_get_virq(max77843->irq_data_muic, 893 muic_irq->irq); 894 if (virq <= 0) { 895 ret = -EINVAL; 896 goto err_muic_irq; 897 } 898 muic_irq->virq = virq; 899 900 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, 901 max77843_muic_irq_handler, IRQF_NO_SUSPEND, 902 muic_irq->name, info); 903 if (ret) { 904 dev_err(&pdev->dev, 905 "Failed to request irq (IRQ: %d, error: %d)\n", 906 muic_irq->irq, ret); 907 goto err_muic_irq; 908 } 909 } 910 911 /* Detect accessory after completing the initialization of platform */ 912 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); 913 queue_delayed_work(system_power_efficient_wq, 914 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); 915 916 return 0; 917 918 err_muic_irq: 919 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 920 i2c_unregister_device(max77843->i2c_muic); 921 922 return ret; 923 } 924 925 static int max77843_muic_remove(struct platform_device *pdev) 926 { 927 struct max77843_muic_info *info = platform_get_drvdata(pdev); 928 struct max77693_dev *max77843 = info->max77843; 929 930 cancel_work_sync(&info->irq_work); 931 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 932 i2c_unregister_device(max77843->i2c_muic); 933 934 return 0; 935 } 936 937 static const struct platform_device_id max77843_muic_id[] = { 938 { "max77843-muic", }, 939 { /* sentinel */ }, 940 }; 941 MODULE_DEVICE_TABLE(platform, max77843_muic_id); 942 943 static struct platform_driver max77843_muic_driver = { 944 .driver = { 945 .name = "max77843-muic", 946 }, 947 .probe = max77843_muic_probe, 948 .remove = max77843_muic_remove, 949 .id_table = max77843_muic_id, 950 }; 951 952 static int __init max77843_muic_init(void) 953 { 954 return platform_driver_register(&max77843_muic_driver); 955 } 956 subsys_initcall(max77843_muic_init); 957 958 MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); 959 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); 960 MODULE_LICENSE("GPL"); 961