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/max77843-private.h> 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/workqueue.h> 22 23 #define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ 24 25 enum max77843_muic_status { 26 MAX77843_MUIC_STATUS1 = 0, 27 MAX77843_MUIC_STATUS2, 28 MAX77843_MUIC_STATUS3, 29 30 MAX77843_MUIC_STATUS_NUM, 31 }; 32 33 struct max77843_muic_info { 34 struct device *dev; 35 struct max77843 *max77843; 36 struct extcon_dev *edev; 37 38 struct mutex mutex; 39 struct work_struct irq_work; 40 struct delayed_work wq_detcable; 41 42 u8 status[MAX77843_MUIC_STATUS_NUM]; 43 int prev_cable_type; 44 int prev_chg_type; 45 int prev_gnd_type; 46 47 bool irq_adc; 48 bool irq_chg; 49 }; 50 51 enum max77843_muic_cable_group { 52 MAX77843_CABLE_GROUP_ADC = 0, 53 MAX77843_CABLE_GROUP_ADC_GND, 54 MAX77843_CABLE_GROUP_CHG, 55 }; 56 57 enum max77843_muic_adc_debounce_time { 58 MAX77843_DEBOUNCE_TIME_5MS = 0, 59 MAX77843_DEBOUNCE_TIME_10MS, 60 MAX77843_DEBOUNCE_TIME_25MS, 61 MAX77843_DEBOUNCE_TIME_38_62MS, 62 }; 63 64 /* Define accessory cable type */ 65 enum max77843_muic_accessory_type { 66 MAX77843_MUIC_ADC_GROUND = 0, 67 MAX77843_MUIC_ADC_SEND_END_BUTTON, 68 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, 69 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, 70 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, 71 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, 72 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, 73 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, 74 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, 75 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, 76 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, 77 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, 78 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, 79 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, 80 MAX77843_MUIC_ADC_RESERVED_ACC_1, 81 MAX77843_MUIC_ADC_RESERVED_ACC_2, 82 MAX77843_MUIC_ADC_RESERVED_ACC_3, 83 MAX77843_MUIC_ADC_RESERVED_ACC_4, 84 MAX77843_MUIC_ADC_RESERVED_ACC_5, 85 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, 86 MAX77843_MUIC_ADC_PHONE_POWERED_DEV, 87 MAX77843_MUIC_ADC_TTY_CONVERTER, 88 MAX77843_MUIC_ADC_UART_CABLE, 89 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, 90 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, 91 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, 92 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, 93 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, 94 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, 95 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, 96 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, 97 MAX77843_MUIC_ADC_OPEN, 98 99 /* The blow accessories should check 100 not only ADC value but also ADC1K and VBVolt value. */ 101 /* Offset|ADC1K|VBVolt| */ 102 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ 103 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ 104 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ 105 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ 106 }; 107 108 /* Define charger cable type */ 109 enum max77843_muic_charger_type { 110 MAX77843_MUIC_CHG_NONE = 0, 111 MAX77843_MUIC_CHG_USB, 112 MAX77843_MUIC_CHG_DOWNSTREAM, 113 MAX77843_MUIC_CHG_DEDICATED, 114 MAX77843_MUIC_CHG_SPECIAL_500MA, 115 MAX77843_MUIC_CHG_SPECIAL_1A, 116 MAX77843_MUIC_CHG_SPECIAL_BIAS, 117 MAX77843_MUIC_CHG_RESERVED, 118 MAX77843_MUIC_CHG_GND, 119 }; 120 121 static const unsigned int max77843_extcon_cable[] = { 122 EXTCON_USB, 123 EXTCON_USB_HOST, 124 EXTCON_TA, 125 EXTCON_CHARGE_DOWNSTREAM, 126 EXTCON_FAST_CHARGER, 127 EXTCON_SLOW_CHARGER, 128 EXTCON_MHL, 129 EXTCON_JIG, 130 EXTCON_NONE, 131 }; 132 133 struct max77843_muic_irq { 134 unsigned int irq; 135 const char *name; 136 unsigned int virq; 137 }; 138 139 static struct max77843_muic_irq max77843_muic_irqs[] = { 140 { MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, 141 { MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, 142 { MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, 143 { MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, 144 { MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, 145 { MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, 146 { MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, 147 { MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, 148 { MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, 149 { MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, 150 { MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, 151 { MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, 152 { MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, 153 { MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, 154 { MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, 155 { MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, 156 }; 157 158 static const struct regmap_config max77843_muic_regmap_config = { 159 .reg_bits = 8, 160 .val_bits = 8, 161 .max_register = MAX77843_MUIC_REG_END, 162 }; 163 164 static const struct regmap_irq max77843_muic_irq[] = { 165 /* INT1 interrupt */ 166 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, 167 { .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, 168 { .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, 169 170 /* INT2 interrupt */ 171 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, 172 { .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, 173 { .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, 174 { .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, 175 { .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, 176 177 /* INT3 interrupt */ 178 { .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, 179 { .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, 180 { .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, 181 { .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, 182 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, 183 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, 184 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, 185 { .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, 186 }; 187 188 static const struct regmap_irq_chip max77843_muic_irq_chip = { 189 .name = "max77843-muic", 190 .status_base = MAX77843_MUIC_REG_INT1, 191 .mask_base = MAX77843_MUIC_REG_INTMASK1, 192 .mask_invert = true, 193 .num_regs = 3, 194 .irqs = max77843_muic_irq, 195 .num_irqs = ARRAY_SIZE(max77843_muic_irq), 196 }; 197 198 static int max77843_muic_set_path(struct max77843_muic_info *info, 199 u8 val, bool attached) 200 { 201 struct max77843 *max77843 = info->max77843; 202 int ret = 0; 203 unsigned int ctrl1, ctrl2; 204 205 if (attached) 206 ctrl1 = val; 207 else 208 ctrl1 = CONTROL1_SW_OPEN; 209 210 ret = regmap_update_bits(max77843->regmap_muic, 211 MAX77843_MUIC_REG_CONTROL1, 212 CONTROL1_COM_SW, ctrl1); 213 if (ret < 0) { 214 dev_err(info->dev, "Cannot switch MUIC port\n"); 215 return ret; 216 } 217 218 if (attached) 219 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; 220 else 221 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; 222 223 ret = regmap_update_bits(max77843->regmap_muic, 224 MAX77843_MUIC_REG_CONTROL2, 225 MAX77843_MUIC_CONTROL2_LOWPWR_MASK | 226 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); 227 if (ret < 0) { 228 dev_err(info->dev, "Cannot update lowpower mode\n"); 229 return ret; 230 } 231 232 dev_dbg(info->dev, 233 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 234 ctrl1, ctrl2, attached ? "attached" : "detached"); 235 236 return 0; 237 } 238 239 static int max77843_muic_get_cable_type(struct max77843_muic_info *info, 240 enum max77843_muic_cable_group group, bool *attached) 241 { 242 int adc, chg_type, cable_type, gnd_type; 243 244 adc = info->status[MAX77843_MUIC_STATUS1] & 245 MAX77843_MUIC_STATUS1_ADC_MASK; 246 adc >>= STATUS1_ADC_SHIFT; 247 248 switch (group) { 249 case MAX77843_CABLE_GROUP_ADC: 250 if (adc == MAX77843_MUIC_ADC_OPEN) { 251 *attached = false; 252 cable_type = info->prev_cable_type; 253 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; 254 } else { 255 *attached = true; 256 cable_type = info->prev_cable_type = adc; 257 } 258 break; 259 case MAX77843_CABLE_GROUP_CHG: 260 chg_type = info->status[MAX77843_MUIC_STATUS2] & 261 MAX77843_MUIC_STATUS2_CHGTYP_MASK; 262 263 /* Check GROUND accessory with charger cable */ 264 if (adc == MAX77843_MUIC_ADC_GROUND) { 265 if (chg_type == MAX77843_MUIC_CHG_NONE) { 266 /* The following state when charger cable is 267 * disconnected but the GROUND accessory still 268 * connected */ 269 *attached = false; 270 cable_type = info->prev_chg_type; 271 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 272 } else { 273 274 /* The following state when charger cable is 275 * connected on the GROUND accessory */ 276 *attached = true; 277 cable_type = MAX77843_MUIC_CHG_GND; 278 info->prev_chg_type = MAX77843_MUIC_CHG_GND; 279 } 280 break; 281 } 282 283 if (chg_type == MAX77843_MUIC_CHG_NONE) { 284 *attached = false; 285 cable_type = info->prev_chg_type; 286 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 287 } else { 288 *attached = true; 289 cable_type = info->prev_chg_type = chg_type; 290 } 291 break; 292 case MAX77843_CABLE_GROUP_ADC_GND: 293 if (adc == MAX77843_MUIC_ADC_OPEN) { 294 *attached = false; 295 cable_type = info->prev_gnd_type; 296 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; 297 } else { 298 *attached = true; 299 300 /* Offset|ADC1K|VBVolt| 301 * 0x1| 0| 0| USB-HOST 302 * 0x1| 0| 1| USB-HOST with VB 303 * 0x1| 1| 0| MHL 304 * 0x1| 1| 1| MHL with VB */ 305 /* Get ADC1K register bit */ 306 gnd_type = (info->status[MAX77843_MUIC_STATUS1] & 307 MAX77843_MUIC_STATUS1_ADC1K_MASK); 308 309 /* Get VBVolt register bit */ 310 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & 311 MAX77843_MUIC_STATUS2_VBVOLT_MASK); 312 gnd_type >>= STATUS2_VBVOLT_SHIFT; 313 314 /* Offset of GND cable */ 315 gnd_type |= MAX77843_MUIC_GND_USB_HOST; 316 cable_type = info->prev_gnd_type = gnd_type; 317 } 318 break; 319 default: 320 dev_err(info->dev, "Unknown cable group (%d)\n", group); 321 cable_type = -EINVAL; 322 break; 323 } 324 325 return cable_type; 326 } 327 328 static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) 329 { 330 int ret, gnd_cable_type; 331 bool attached; 332 333 gnd_cable_type = max77843_muic_get_cable_type(info, 334 MAX77843_CABLE_GROUP_ADC_GND, &attached); 335 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", 336 attached ? "attached" : "detached", gnd_cable_type); 337 338 switch (gnd_cable_type) { 339 case MAX77843_MUIC_GND_USB_HOST: 340 case MAX77843_MUIC_GND_USB_HOST_VB: 341 ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached); 342 if (ret < 0) 343 return ret; 344 345 extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached); 346 break; 347 case MAX77843_MUIC_GND_MHL_VB: 348 case MAX77843_MUIC_GND_MHL: 349 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); 350 if (ret < 0) 351 return ret; 352 353 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached); 354 break; 355 default: 356 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", 357 attached ? "attached" : "detached", gnd_cable_type); 358 return -EINVAL; 359 } 360 361 return 0; 362 } 363 364 static int max77843_muic_jig_handler(struct max77843_muic_info *info, 365 int cable_type, bool attached) 366 { 367 int ret; 368 u8 path = CONTROL1_SW_OPEN; 369 370 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", 371 attached ? "attached" : "detached", cable_type); 372 373 switch (cable_type) { 374 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 375 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 376 path = CONTROL1_SW_USB; 377 break; 378 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 379 path = CONTROL1_SW_UART; 380 break; 381 default: 382 return -EINVAL; 383 } 384 385 ret = max77843_muic_set_path(info, path, attached); 386 if (ret < 0) 387 return ret; 388 389 extcon_set_cable_state_(info->edev, EXTCON_JIG, attached); 390 391 return 0; 392 } 393 394 static int max77843_muic_adc_handler(struct max77843_muic_info *info) 395 { 396 int ret, cable_type; 397 bool attached; 398 399 cable_type = max77843_muic_get_cable_type(info, 400 MAX77843_CABLE_GROUP_ADC, &attached); 401 402 dev_dbg(info->dev, 403 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 404 attached ? "attached" : "detached", cable_type, 405 info->prev_cable_type); 406 407 switch (cable_type) { 408 case MAX77843_MUIC_ADC_GROUND: 409 ret = max77843_muic_adc_gnd_handler(info); 410 if (ret < 0) 411 return ret; 412 break; 413 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 414 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 415 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 416 ret = max77843_muic_jig_handler(info, cable_type, attached); 417 if (ret < 0) 418 return ret; 419 break; 420 case MAX77843_MUIC_ADC_SEND_END_BUTTON: 421 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: 422 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: 423 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: 424 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: 425 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: 426 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: 427 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: 428 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: 429 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: 430 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: 431 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: 432 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: 433 case MAX77843_MUIC_ADC_RESERVED_ACC_1: 434 case MAX77843_MUIC_ADC_RESERVED_ACC_2: 435 case MAX77843_MUIC_ADC_RESERVED_ACC_3: 436 case MAX77843_MUIC_ADC_RESERVED_ACC_4: 437 case MAX77843_MUIC_ADC_RESERVED_ACC_5: 438 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: 439 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: 440 case MAX77843_MUIC_ADC_TTY_CONVERTER: 441 case MAX77843_MUIC_ADC_UART_CABLE: 442 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: 443 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: 444 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: 445 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: 446 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: 447 case MAX77843_MUIC_ADC_OPEN: 448 dev_err(info->dev, 449 "accessory is %s but it isn't used (adc:0x%x)\n", 450 attached ? "attached" : "detached", cable_type); 451 return -EAGAIN; 452 default: 453 dev_err(info->dev, 454 "failed to detect %s accessory (adc:0x%x)\n", 455 attached ? "attached" : "detached", cable_type); 456 return -EINVAL; 457 } 458 459 return 0; 460 } 461 462 static int max77843_muic_chg_handler(struct max77843_muic_info *info) 463 { 464 int ret, chg_type, gnd_type; 465 bool attached; 466 467 chg_type = max77843_muic_get_cable_type(info, 468 MAX77843_CABLE_GROUP_CHG, &attached); 469 470 dev_dbg(info->dev, 471 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 472 attached ? "attached" : "detached", 473 chg_type, info->prev_chg_type); 474 475 switch (chg_type) { 476 case MAX77843_MUIC_CHG_USB: 477 ret = max77843_muic_set_path(info, CONTROL1_SW_USB, attached); 478 if (ret < 0) 479 return ret; 480 481 extcon_set_cable_state_(info->edev, EXTCON_USB, attached); 482 break; 483 case MAX77843_MUIC_CHG_DOWNSTREAM: 484 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); 485 if (ret < 0) 486 return ret; 487 488 extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM, 489 attached); 490 break; 491 case MAX77843_MUIC_CHG_DEDICATED: 492 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); 493 if (ret < 0) 494 return ret; 495 496 extcon_set_cable_state_(info->edev, EXTCON_TA, attached); 497 break; 498 case MAX77843_MUIC_CHG_SPECIAL_500MA: 499 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); 500 if (ret < 0) 501 return ret; 502 503 extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER, 504 attached); 505 break; 506 case MAX77843_MUIC_CHG_SPECIAL_1A: 507 ret = max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); 508 if (ret < 0) 509 return ret; 510 511 extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER, 512 attached); 513 break; 514 case MAX77843_MUIC_CHG_GND: 515 gnd_type = max77843_muic_get_cable_type(info, 516 MAX77843_CABLE_GROUP_ADC_GND, &attached); 517 518 /* Charger cable on MHL accessory is attach or detach */ 519 if (gnd_type == MAX77843_MUIC_GND_MHL_VB) 520 extcon_set_cable_state_(info->edev, EXTCON_TA, true); 521 else if (gnd_type == MAX77843_MUIC_GND_MHL) 522 extcon_set_cable_state_(info->edev, EXTCON_TA, false); 523 break; 524 case MAX77843_MUIC_CHG_NONE: 525 break; 526 default: 527 dev_err(info->dev, 528 "failed to detect %s accessory (chg_type:0x%x)\n", 529 attached ? "attached" : "detached", chg_type); 530 531 max77843_muic_set_path(info, CONTROL1_SW_OPEN, attached); 532 return -EINVAL; 533 } 534 535 return 0; 536 } 537 538 static void max77843_muic_irq_work(struct work_struct *work) 539 { 540 struct max77843_muic_info *info = container_of(work, 541 struct max77843_muic_info, irq_work); 542 struct max77843 *max77843 = info->max77843; 543 int ret = 0; 544 545 mutex_lock(&info->mutex); 546 547 ret = regmap_bulk_read(max77843->regmap_muic, 548 MAX77843_MUIC_REG_STATUS1, info->status, 549 MAX77843_MUIC_STATUS_NUM); 550 if (ret) { 551 dev_err(info->dev, "Cannot read STATUS registers\n"); 552 mutex_unlock(&info->mutex); 553 return; 554 } 555 556 if (info->irq_adc) { 557 ret = max77843_muic_adc_handler(info); 558 if (ret) 559 dev_err(info->dev, "Unknown cable type\n"); 560 info->irq_adc = false; 561 } 562 563 if (info->irq_chg) { 564 ret = max77843_muic_chg_handler(info); 565 if (ret) 566 dev_err(info->dev, "Unknown charger type\n"); 567 info->irq_chg = false; 568 } 569 570 mutex_unlock(&info->mutex); 571 } 572 573 static irqreturn_t max77843_muic_irq_handler(int irq, void *data) 574 { 575 struct max77843_muic_info *info = data; 576 int i, irq_type = -1; 577 578 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) 579 if (irq == max77843_muic_irqs[i].virq) 580 irq_type = max77843_muic_irqs[i].irq; 581 582 switch (irq_type) { 583 case MAX77843_MUIC_IRQ_INT1_ADC: 584 case MAX77843_MUIC_IRQ_INT1_ADCERROR: 585 case MAX77843_MUIC_IRQ_INT1_ADC1K: 586 info->irq_adc = true; 587 break; 588 case MAX77843_MUIC_IRQ_INT2_CHGTYP: 589 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: 590 case MAX77843_MUIC_IRQ_INT2_DCDTMR: 591 case MAX77843_MUIC_IRQ_INT2_DXOVP: 592 case MAX77843_MUIC_IRQ_INT2_VBVOLT: 593 info->irq_chg = true; 594 break; 595 case MAX77843_MUIC_IRQ_INT3_VBADC: 596 case MAX77843_MUIC_IRQ_INT3_VDNMON: 597 case MAX77843_MUIC_IRQ_INT3_DNRES: 598 case MAX77843_MUIC_IRQ_INT3_MPNACK: 599 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: 600 case MAX77843_MUIC_IRQ_INT3_MRXTRF: 601 case MAX77843_MUIC_IRQ_INT3_MRXPERR: 602 case MAX77843_MUIC_IRQ_INT3_MRXRDY: 603 break; 604 default: 605 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); 606 break; 607 } 608 609 schedule_work(&info->irq_work); 610 611 return IRQ_HANDLED; 612 } 613 614 static void max77843_muic_detect_cable_wq(struct work_struct *work) 615 { 616 struct max77843_muic_info *info = container_of(to_delayed_work(work), 617 struct max77843_muic_info, wq_detcable); 618 struct max77843 *max77843 = info->max77843; 619 int chg_type, adc, ret; 620 bool attached; 621 622 mutex_lock(&info->mutex); 623 624 ret = regmap_bulk_read(max77843->regmap_muic, 625 MAX77843_MUIC_REG_STATUS1, info->status, 626 MAX77843_MUIC_STATUS_NUM); 627 if (ret) { 628 dev_err(info->dev, "Cannot read STATUS registers\n"); 629 goto err_cable_wq; 630 } 631 632 adc = max77843_muic_get_cable_type(info, 633 MAX77843_CABLE_GROUP_ADC, &attached); 634 if (attached && adc != MAX77843_MUIC_ADC_OPEN) { 635 ret = max77843_muic_adc_handler(info); 636 if (ret < 0) { 637 dev_err(info->dev, "Cannot detect accessory\n"); 638 goto err_cable_wq; 639 } 640 } 641 642 chg_type = max77843_muic_get_cable_type(info, 643 MAX77843_CABLE_GROUP_CHG, &attached); 644 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { 645 ret = max77843_muic_chg_handler(info); 646 if (ret < 0) { 647 dev_err(info->dev, "Cannot detect charger accessory\n"); 648 goto err_cable_wq; 649 } 650 } 651 652 err_cable_wq: 653 mutex_unlock(&info->mutex); 654 } 655 656 static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, 657 enum max77843_muic_adc_debounce_time time) 658 { 659 struct max77843 *max77843 = info->max77843; 660 int ret; 661 662 switch (time) { 663 case MAX77843_DEBOUNCE_TIME_5MS: 664 case MAX77843_DEBOUNCE_TIME_10MS: 665 case MAX77843_DEBOUNCE_TIME_25MS: 666 case MAX77843_DEBOUNCE_TIME_38_62MS: 667 ret = regmap_update_bits(max77843->regmap_muic, 668 MAX77843_MUIC_REG_CONTROL4, 669 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, 670 time << CONTROL4_ADCDBSET_SHIFT); 671 if (ret < 0) { 672 dev_err(info->dev, "Cannot write MUIC regmap\n"); 673 return ret; 674 } 675 break; 676 default: 677 dev_err(info->dev, "Invalid ADC debounce time\n"); 678 return -EINVAL; 679 } 680 681 return 0; 682 } 683 684 static int max77843_init_muic_regmap(struct max77843 *max77843) 685 { 686 int ret; 687 688 max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, 689 I2C_ADDR_MUIC); 690 if (!max77843->i2c_muic) { 691 dev_err(&max77843->i2c->dev, 692 "Cannot allocate I2C device for MUIC\n"); 693 return -ENOMEM; 694 } 695 696 i2c_set_clientdata(max77843->i2c_muic, max77843); 697 698 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, 699 &max77843_muic_regmap_config); 700 if (IS_ERR(max77843->regmap_muic)) { 701 ret = PTR_ERR(max77843->regmap_muic); 702 goto err_muic_i2c; 703 } 704 705 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, 706 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, 707 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); 708 if (ret < 0) { 709 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); 710 goto err_muic_i2c; 711 } 712 713 return 0; 714 715 err_muic_i2c: 716 i2c_unregister_device(max77843->i2c_muic); 717 718 return ret; 719 } 720 721 static int max77843_muic_probe(struct platform_device *pdev) 722 { 723 struct max77843 *max77843 = dev_get_drvdata(pdev->dev.parent); 724 struct max77843_muic_info *info; 725 unsigned int id; 726 int i, ret; 727 728 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 729 if (!info) 730 return -ENOMEM; 731 732 info->dev = &pdev->dev; 733 info->max77843 = max77843; 734 735 platform_set_drvdata(pdev, info); 736 mutex_init(&info->mutex); 737 738 /* Initialize i2c and regmap */ 739 ret = max77843_init_muic_regmap(max77843); 740 if (ret) { 741 dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); 742 return ret; 743 } 744 745 /* Turn off auto detection configuration */ 746 ret = regmap_update_bits(max77843->regmap_muic, 747 MAX77843_MUIC_REG_CONTROL4, 748 MAX77843_MUIC_CONTROL4_USBAUTO_MASK | 749 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, 750 CONTROL4_AUTO_DISABLE); 751 752 /* Initialize extcon device */ 753 info->edev = devm_extcon_dev_allocate(&pdev->dev, 754 max77843_extcon_cable); 755 if (IS_ERR(info->edev)) { 756 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); 757 ret = -ENODEV; 758 goto err_muic_irq; 759 } 760 761 ret = devm_extcon_dev_register(&pdev->dev, info->edev); 762 if (ret) { 763 dev_err(&pdev->dev, "Failed to register extcon device\n"); 764 goto err_muic_irq; 765 } 766 767 /* Set ADC debounce time */ 768 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); 769 770 /* Set initial path for UART */ 771 max77843_muic_set_path(info, CONTROL1_SW_UART, true); 772 773 /* Check revision number of MUIC device */ 774 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); 775 if (ret < 0) { 776 dev_err(&pdev->dev, "Failed to read revision number\n"); 777 goto err_muic_irq; 778 } 779 dev_info(info->dev, "MUIC device ID : 0x%x\n", id); 780 781 /* Support virtual irq domain for max77843 MUIC device */ 782 INIT_WORK(&info->irq_work, max77843_muic_irq_work); 783 784 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { 785 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; 786 unsigned int virq = 0; 787 788 virq = regmap_irq_get_virq(max77843->irq_data_muic, 789 muic_irq->irq); 790 if (virq <= 0) { 791 ret = -EINVAL; 792 goto err_muic_irq; 793 } 794 muic_irq->virq = virq; 795 796 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, 797 max77843_muic_irq_handler, IRQF_NO_SUSPEND, 798 muic_irq->name, info); 799 if (ret) { 800 dev_err(&pdev->dev, 801 "Failed to request irq (IRQ: %d, error: %d)\n", 802 muic_irq->irq, ret); 803 goto err_muic_irq; 804 } 805 } 806 807 /* Detect accessory after completing the initialization of platform */ 808 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); 809 queue_delayed_work(system_power_efficient_wq, 810 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); 811 812 return 0; 813 814 err_muic_irq: 815 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 816 i2c_unregister_device(max77843->i2c_muic); 817 818 return ret; 819 } 820 821 static int max77843_muic_remove(struct platform_device *pdev) 822 { 823 struct max77843_muic_info *info = platform_get_drvdata(pdev); 824 struct max77843 *max77843 = info->max77843; 825 826 cancel_work_sync(&info->irq_work); 827 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 828 i2c_unregister_device(max77843->i2c_muic); 829 830 return 0; 831 } 832 833 static const struct platform_device_id max77843_muic_id[] = { 834 { "max77843-muic", }, 835 { /* sentinel */ }, 836 }; 837 MODULE_DEVICE_TABLE(platform, max77843_muic_id); 838 839 static struct platform_driver max77843_muic_driver = { 840 .driver = { 841 .name = "max77843-muic", 842 }, 843 .probe = max77843_muic_probe, 844 .remove = max77843_muic_remove, 845 .id_table = max77843_muic_id, 846 }; 847 848 static int __init max77843_muic_init(void) 849 { 850 return platform_driver_register(&max77843_muic_driver); 851 } 852 subsys_initcall(max77843_muic_init); 853 854 MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); 855 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); 856 MODULE_LICENSE("GPL"); 857