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