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 /* The blow accessories should check 101 not only ADC value but also ADC1K and VBVolt value. */ 102 /* Offset|ADC1K|VBVolt| */ 103 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ 104 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ 105 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ 106 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ 107 }; 108 109 /* Define charger cable type */ 110 enum max77843_muic_charger_type { 111 MAX77843_MUIC_CHG_NONE = 0, 112 MAX77843_MUIC_CHG_USB, 113 MAX77843_MUIC_CHG_DOWNSTREAM, 114 MAX77843_MUIC_CHG_DEDICATED, 115 MAX77843_MUIC_CHG_SPECIAL_500MA, 116 MAX77843_MUIC_CHG_SPECIAL_1A, 117 MAX77843_MUIC_CHG_SPECIAL_BIAS, 118 MAX77843_MUIC_CHG_RESERVED, 119 MAX77843_MUIC_CHG_GND, 120 }; 121 122 static const unsigned int max77843_extcon_cable[] = { 123 EXTCON_USB, 124 EXTCON_USB_HOST, 125 EXTCON_TA, 126 EXTCON_CHARGE_DOWNSTREAM, 127 EXTCON_FAST_CHARGER, 128 EXTCON_SLOW_CHARGER, 129 EXTCON_MHL, 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) 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; 210 211 ret = regmap_update_bits(max77843->regmap_muic, 212 MAX77843_MUIC_REG_CONTROL1, 213 MAX77843_MUIC_CONTROL1_COM_SW, ctrl1); 214 if (ret < 0) { 215 dev_err(info->dev, "Cannot switch MUIC port\n"); 216 return ret; 217 } 218 219 if (attached) 220 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; 221 else 222 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; 223 224 ret = regmap_update_bits(max77843->regmap_muic, 225 MAX77843_MUIC_REG_CONTROL2, 226 MAX77843_MUIC_CONTROL2_LOWPWR_MASK | 227 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); 228 if (ret < 0) { 229 dev_err(info->dev, "Cannot update lowpower mode\n"); 230 return ret; 231 } 232 233 dev_dbg(info->dev, 234 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", 235 ctrl1, ctrl2, attached ? "attached" : "detached"); 236 237 return 0; 238 } 239 240 static int max77843_muic_get_cable_type(struct max77843_muic_info *info, 241 enum max77843_muic_cable_group group, bool *attached) 242 { 243 int adc, chg_type, cable_type, gnd_type; 244 245 adc = info->status[MAX77843_MUIC_STATUS1] & 246 MAX77843_MUIC_STATUS1_ADC_MASK; 247 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; 248 249 switch (group) { 250 case MAX77843_CABLE_GROUP_ADC: 251 if (adc == MAX77843_MUIC_ADC_OPEN) { 252 *attached = false; 253 cable_type = info->prev_cable_type; 254 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; 255 } else { 256 *attached = true; 257 cable_type = info->prev_cable_type = adc; 258 } 259 break; 260 case MAX77843_CABLE_GROUP_CHG: 261 chg_type = info->status[MAX77843_MUIC_STATUS2] & 262 MAX77843_MUIC_STATUS2_CHGTYP_MASK; 263 264 /* Check GROUND accessory with charger cable */ 265 if (adc == MAX77843_MUIC_ADC_GROUND) { 266 if (chg_type == MAX77843_MUIC_CHG_NONE) { 267 /* The following state when charger cable is 268 * disconnected but the GROUND accessory still 269 * connected */ 270 *attached = false; 271 cable_type = info->prev_chg_type; 272 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 273 } else { 274 275 /* The following state when charger cable is 276 * connected on the GROUND accessory */ 277 *attached = true; 278 cable_type = MAX77843_MUIC_CHG_GND; 279 info->prev_chg_type = MAX77843_MUIC_CHG_GND; 280 } 281 break; 282 } 283 284 if (chg_type == MAX77843_MUIC_CHG_NONE) { 285 *attached = false; 286 cable_type = info->prev_chg_type; 287 info->prev_chg_type = MAX77843_MUIC_CHG_NONE; 288 } else { 289 *attached = true; 290 cable_type = info->prev_chg_type = chg_type; 291 } 292 break; 293 case MAX77843_CABLE_GROUP_ADC_GND: 294 if (adc == MAX77843_MUIC_ADC_OPEN) { 295 *attached = false; 296 cable_type = info->prev_gnd_type; 297 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; 298 } else { 299 *attached = true; 300 301 /* Offset|ADC1K|VBVolt| 302 * 0x1| 0| 0| USB-HOST 303 * 0x1| 0| 1| USB-HOST with VB 304 * 0x1| 1| 0| MHL 305 * 0x1| 1| 1| MHL with VB */ 306 /* Get ADC1K register bit */ 307 gnd_type = (info->status[MAX77843_MUIC_STATUS1] & 308 MAX77843_MUIC_STATUS1_ADC1K_MASK); 309 310 /* Get VBVolt register bit */ 311 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & 312 MAX77843_MUIC_STATUS2_VBVOLT_MASK); 313 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; 314 315 /* Offset of GND cable */ 316 gnd_type |= MAX77843_MUIC_GND_USB_HOST; 317 cable_type = info->prev_gnd_type = gnd_type; 318 } 319 break; 320 default: 321 dev_err(info->dev, "Unknown cable group (%d)\n", group); 322 cable_type = -EINVAL; 323 break; 324 } 325 326 return cable_type; 327 } 328 329 static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) 330 { 331 int ret, gnd_cable_type; 332 bool attached; 333 334 gnd_cable_type = max77843_muic_get_cable_type(info, 335 MAX77843_CABLE_GROUP_ADC_GND, &attached); 336 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", 337 attached ? "attached" : "detached", gnd_cable_type); 338 339 switch (gnd_cable_type) { 340 case MAX77843_MUIC_GND_USB_HOST: 341 case MAX77843_MUIC_GND_USB_HOST_VB: 342 ret = max77843_muic_set_path(info, 343 MAX77843_MUIC_CONTROL1_SW_USB, 344 attached); 345 if (ret < 0) 346 return ret; 347 348 extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached); 349 break; 350 case MAX77843_MUIC_GND_MHL_VB: 351 case MAX77843_MUIC_GND_MHL: 352 ret = max77843_muic_set_path(info, 353 MAX77843_MUIC_CONTROL1_SW_OPEN, 354 attached); 355 if (ret < 0) 356 return ret; 357 358 extcon_set_cable_state_(info->edev, EXTCON_MHL, attached); 359 break; 360 default: 361 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", 362 attached ? "attached" : "detached", gnd_cable_type); 363 return -EINVAL; 364 } 365 366 return 0; 367 } 368 369 static int max77843_muic_jig_handler(struct max77843_muic_info *info, 370 int cable_type, bool attached) 371 { 372 int ret; 373 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; 374 375 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", 376 attached ? "attached" : "detached", cable_type); 377 378 switch (cable_type) { 379 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 380 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 381 path = MAX77843_MUIC_CONTROL1_SW_USB; 382 break; 383 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 384 path = MAX77843_MUIC_CONTROL1_SW_UART; 385 break; 386 default: 387 return -EINVAL; 388 } 389 390 ret = max77843_muic_set_path(info, path, attached); 391 if (ret < 0) 392 return ret; 393 394 extcon_set_cable_state_(info->edev, EXTCON_JIG, attached); 395 396 return 0; 397 } 398 399 static int max77843_muic_adc_handler(struct max77843_muic_info *info) 400 { 401 int ret, cable_type; 402 bool attached; 403 404 cable_type = max77843_muic_get_cable_type(info, 405 MAX77843_CABLE_GROUP_ADC, &attached); 406 407 dev_dbg(info->dev, 408 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", 409 attached ? "attached" : "detached", cable_type, 410 info->prev_cable_type); 411 412 switch (cable_type) { 413 case MAX77843_MUIC_ADC_GROUND: 414 ret = max77843_muic_adc_gnd_handler(info); 415 if (ret < 0) 416 return ret; 417 break; 418 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: 419 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: 420 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: 421 ret = max77843_muic_jig_handler(info, cable_type, attached); 422 if (ret < 0) 423 return ret; 424 break; 425 case MAX77843_MUIC_ADC_SEND_END_BUTTON: 426 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: 427 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: 428 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: 429 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: 430 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: 431 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: 432 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: 433 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: 434 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: 435 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: 436 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: 437 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: 438 case MAX77843_MUIC_ADC_RESERVED_ACC_1: 439 case MAX77843_MUIC_ADC_RESERVED_ACC_2: 440 case MAX77843_MUIC_ADC_RESERVED_ACC_3: 441 case MAX77843_MUIC_ADC_RESERVED_ACC_4: 442 case MAX77843_MUIC_ADC_RESERVED_ACC_5: 443 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: 444 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: 445 case MAX77843_MUIC_ADC_TTY_CONVERTER: 446 case MAX77843_MUIC_ADC_UART_CABLE: 447 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: 448 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: 449 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: 450 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: 451 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: 452 case MAX77843_MUIC_ADC_OPEN: 453 dev_err(info->dev, 454 "accessory is %s but it isn't used (adc:0x%x)\n", 455 attached ? "attached" : "detached", cable_type); 456 return -EAGAIN; 457 default: 458 dev_err(info->dev, 459 "failed to detect %s accessory (adc:0x%x)\n", 460 attached ? "attached" : "detached", cable_type); 461 return -EINVAL; 462 } 463 464 return 0; 465 } 466 467 static int max77843_muic_chg_handler(struct max77843_muic_info *info) 468 { 469 int ret, chg_type, gnd_type; 470 bool attached; 471 472 chg_type = max77843_muic_get_cable_type(info, 473 MAX77843_CABLE_GROUP_CHG, &attached); 474 475 dev_dbg(info->dev, 476 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", 477 attached ? "attached" : "detached", 478 chg_type, info->prev_chg_type); 479 480 switch (chg_type) { 481 case MAX77843_MUIC_CHG_USB: 482 ret = max77843_muic_set_path(info, 483 MAX77843_MUIC_CONTROL1_SW_USB, 484 attached); 485 if (ret < 0) 486 return ret; 487 488 extcon_set_cable_state_(info->edev, EXTCON_USB, attached); 489 break; 490 case MAX77843_MUIC_CHG_DOWNSTREAM: 491 ret = max77843_muic_set_path(info, 492 MAX77843_MUIC_CONTROL1_SW_OPEN, 493 attached); 494 if (ret < 0) 495 return ret; 496 497 extcon_set_cable_state_(info->edev, EXTCON_CHARGE_DOWNSTREAM, 498 attached); 499 break; 500 case MAX77843_MUIC_CHG_DEDICATED: 501 ret = max77843_muic_set_path(info, 502 MAX77843_MUIC_CONTROL1_SW_OPEN, 503 attached); 504 if (ret < 0) 505 return ret; 506 507 extcon_set_cable_state_(info->edev, EXTCON_TA, attached); 508 break; 509 case MAX77843_MUIC_CHG_SPECIAL_500MA: 510 ret = max77843_muic_set_path(info, 511 MAX77843_MUIC_CONTROL1_SW_OPEN, 512 attached); 513 if (ret < 0) 514 return ret; 515 516 extcon_set_cable_state_(info->edev, EXTCON_SLOW_CHARGER, 517 attached); 518 break; 519 case MAX77843_MUIC_CHG_SPECIAL_1A: 520 ret = max77843_muic_set_path(info, 521 MAX77843_MUIC_CONTROL1_SW_OPEN, 522 attached); 523 if (ret < 0) 524 return ret; 525 526 extcon_set_cable_state_(info->edev, EXTCON_FAST_CHARGER, 527 attached); 528 break; 529 case MAX77843_MUIC_CHG_GND: 530 gnd_type = max77843_muic_get_cable_type(info, 531 MAX77843_CABLE_GROUP_ADC_GND, &attached); 532 533 /* Charger cable on MHL accessory is attach or detach */ 534 if (gnd_type == MAX77843_MUIC_GND_MHL_VB) 535 extcon_set_cable_state_(info->edev, EXTCON_TA, true); 536 else if (gnd_type == MAX77843_MUIC_GND_MHL) 537 extcon_set_cable_state_(info->edev, EXTCON_TA, false); 538 break; 539 case MAX77843_MUIC_CHG_NONE: 540 break; 541 default: 542 dev_err(info->dev, 543 "failed to detect %s accessory (chg_type:0x%x)\n", 544 attached ? "attached" : "detached", chg_type); 545 546 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, 547 attached); 548 return -EINVAL; 549 } 550 551 return 0; 552 } 553 554 static void max77843_muic_irq_work(struct work_struct *work) 555 { 556 struct max77843_muic_info *info = container_of(work, 557 struct max77843_muic_info, irq_work); 558 struct max77693_dev *max77843 = info->max77843; 559 int ret = 0; 560 561 mutex_lock(&info->mutex); 562 563 ret = regmap_bulk_read(max77843->regmap_muic, 564 MAX77843_MUIC_REG_STATUS1, info->status, 565 MAX77843_MUIC_STATUS_NUM); 566 if (ret) { 567 dev_err(info->dev, "Cannot read STATUS registers\n"); 568 mutex_unlock(&info->mutex); 569 return; 570 } 571 572 if (info->irq_adc) { 573 ret = max77843_muic_adc_handler(info); 574 if (ret) 575 dev_err(info->dev, "Unknown cable type\n"); 576 info->irq_adc = false; 577 } 578 579 if (info->irq_chg) { 580 ret = max77843_muic_chg_handler(info); 581 if (ret) 582 dev_err(info->dev, "Unknown charger type\n"); 583 info->irq_chg = false; 584 } 585 586 mutex_unlock(&info->mutex); 587 } 588 589 static irqreturn_t max77843_muic_irq_handler(int irq, void *data) 590 { 591 struct max77843_muic_info *info = data; 592 int i, irq_type = -1; 593 594 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) 595 if (irq == max77843_muic_irqs[i].virq) 596 irq_type = max77843_muic_irqs[i].irq; 597 598 switch (irq_type) { 599 case MAX77843_MUIC_IRQ_INT1_ADC: 600 case MAX77843_MUIC_IRQ_INT1_ADCERROR: 601 case MAX77843_MUIC_IRQ_INT1_ADC1K: 602 info->irq_adc = true; 603 break; 604 case MAX77843_MUIC_IRQ_INT2_CHGTYP: 605 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: 606 case MAX77843_MUIC_IRQ_INT2_DCDTMR: 607 case MAX77843_MUIC_IRQ_INT2_DXOVP: 608 case MAX77843_MUIC_IRQ_INT2_VBVOLT: 609 info->irq_chg = true; 610 break; 611 case MAX77843_MUIC_IRQ_INT3_VBADC: 612 case MAX77843_MUIC_IRQ_INT3_VDNMON: 613 case MAX77843_MUIC_IRQ_INT3_DNRES: 614 case MAX77843_MUIC_IRQ_INT3_MPNACK: 615 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: 616 case MAX77843_MUIC_IRQ_INT3_MRXTRF: 617 case MAX77843_MUIC_IRQ_INT3_MRXPERR: 618 case MAX77843_MUIC_IRQ_INT3_MRXRDY: 619 break; 620 default: 621 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); 622 break; 623 } 624 625 schedule_work(&info->irq_work); 626 627 return IRQ_HANDLED; 628 } 629 630 static void max77843_muic_detect_cable_wq(struct work_struct *work) 631 { 632 struct max77843_muic_info *info = container_of(to_delayed_work(work), 633 struct max77843_muic_info, wq_detcable); 634 struct max77693_dev *max77843 = info->max77843; 635 int chg_type, adc, ret; 636 bool attached; 637 638 mutex_lock(&info->mutex); 639 640 ret = regmap_bulk_read(max77843->regmap_muic, 641 MAX77843_MUIC_REG_STATUS1, info->status, 642 MAX77843_MUIC_STATUS_NUM); 643 if (ret) { 644 dev_err(info->dev, "Cannot read STATUS registers\n"); 645 goto err_cable_wq; 646 } 647 648 adc = max77843_muic_get_cable_type(info, 649 MAX77843_CABLE_GROUP_ADC, &attached); 650 if (attached && adc != MAX77843_MUIC_ADC_OPEN) { 651 ret = max77843_muic_adc_handler(info); 652 if (ret < 0) { 653 dev_err(info->dev, "Cannot detect accessory\n"); 654 goto err_cable_wq; 655 } 656 } 657 658 chg_type = max77843_muic_get_cable_type(info, 659 MAX77843_CABLE_GROUP_CHG, &attached); 660 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { 661 ret = max77843_muic_chg_handler(info); 662 if (ret < 0) { 663 dev_err(info->dev, "Cannot detect charger accessory\n"); 664 goto err_cable_wq; 665 } 666 } 667 668 err_cable_wq: 669 mutex_unlock(&info->mutex); 670 } 671 672 static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, 673 enum max77843_muic_adc_debounce_time time) 674 { 675 struct max77693_dev *max77843 = info->max77843; 676 int ret; 677 678 switch (time) { 679 case MAX77843_DEBOUNCE_TIME_5MS: 680 case MAX77843_DEBOUNCE_TIME_10MS: 681 case MAX77843_DEBOUNCE_TIME_25MS: 682 case MAX77843_DEBOUNCE_TIME_38_62MS: 683 ret = regmap_update_bits(max77843->regmap_muic, 684 MAX77843_MUIC_REG_CONTROL4, 685 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, 686 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); 687 if (ret < 0) { 688 dev_err(info->dev, "Cannot write MUIC regmap\n"); 689 return ret; 690 } 691 break; 692 default: 693 dev_err(info->dev, "Invalid ADC debounce time\n"); 694 return -EINVAL; 695 } 696 697 return 0; 698 } 699 700 static int max77843_init_muic_regmap(struct max77693_dev *max77843) 701 { 702 int ret; 703 704 max77843->i2c_muic = i2c_new_dummy(max77843->i2c->adapter, 705 I2C_ADDR_MUIC); 706 if (!max77843->i2c_muic) { 707 dev_err(&max77843->i2c->dev, 708 "Cannot allocate I2C device for MUIC\n"); 709 return -ENOMEM; 710 } 711 712 i2c_set_clientdata(max77843->i2c_muic, max77843); 713 714 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, 715 &max77843_muic_regmap_config); 716 if (IS_ERR(max77843->regmap_muic)) { 717 ret = PTR_ERR(max77843->regmap_muic); 718 goto err_muic_i2c; 719 } 720 721 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, 722 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, 723 0, &max77843_muic_irq_chip, &max77843->irq_data_muic); 724 if (ret < 0) { 725 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); 726 goto err_muic_i2c; 727 } 728 729 return 0; 730 731 err_muic_i2c: 732 i2c_unregister_device(max77843->i2c_muic); 733 734 return ret; 735 } 736 737 static int max77843_muic_probe(struct platform_device *pdev) 738 { 739 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); 740 struct max77843_muic_info *info; 741 unsigned int id; 742 int i, ret; 743 744 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); 745 if (!info) 746 return -ENOMEM; 747 748 info->dev = &pdev->dev; 749 info->max77843 = max77843; 750 751 platform_set_drvdata(pdev, info); 752 mutex_init(&info->mutex); 753 754 /* Initialize i2c and regmap */ 755 ret = max77843_init_muic_regmap(max77843); 756 if (ret) { 757 dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); 758 return ret; 759 } 760 761 /* Turn off auto detection configuration */ 762 ret = regmap_update_bits(max77843->regmap_muic, 763 MAX77843_MUIC_REG_CONTROL4, 764 MAX77843_MUIC_CONTROL4_USBAUTO_MASK | 765 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, 766 CONTROL4_AUTO_DISABLE); 767 768 /* Initialize extcon device */ 769 info->edev = devm_extcon_dev_allocate(&pdev->dev, 770 max77843_extcon_cable); 771 if (IS_ERR(info->edev)) { 772 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); 773 ret = -ENODEV; 774 goto err_muic_irq; 775 } 776 777 ret = devm_extcon_dev_register(&pdev->dev, info->edev); 778 if (ret) { 779 dev_err(&pdev->dev, "Failed to register extcon device\n"); 780 goto err_muic_irq; 781 } 782 783 /* Set ADC debounce time */ 784 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); 785 786 /* Set initial path for UART */ 787 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, true); 788 789 /* Check revision number of MUIC device */ 790 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); 791 if (ret < 0) { 792 dev_err(&pdev->dev, "Failed to read revision number\n"); 793 goto err_muic_irq; 794 } 795 dev_info(info->dev, "MUIC device ID : 0x%x\n", id); 796 797 /* Support virtual irq domain for max77843 MUIC device */ 798 INIT_WORK(&info->irq_work, max77843_muic_irq_work); 799 800 /* Clear IRQ bits before request IRQs */ 801 ret = regmap_bulk_read(max77843->regmap_muic, 802 MAX77843_MUIC_REG_INT1, info->status, 803 MAX77843_MUIC_IRQ_NUM); 804 if (ret) { 805 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); 806 goto err_muic_irq; 807 } 808 809 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { 810 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; 811 unsigned int virq = 0; 812 813 virq = regmap_irq_get_virq(max77843->irq_data_muic, 814 muic_irq->irq); 815 if (virq <= 0) { 816 ret = -EINVAL; 817 goto err_muic_irq; 818 } 819 muic_irq->virq = virq; 820 821 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, 822 max77843_muic_irq_handler, IRQF_NO_SUSPEND, 823 muic_irq->name, info); 824 if (ret) { 825 dev_err(&pdev->dev, 826 "Failed to request irq (IRQ: %d, error: %d)\n", 827 muic_irq->irq, ret); 828 goto err_muic_irq; 829 } 830 } 831 832 /* Detect accessory after completing the initialization of platform */ 833 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); 834 queue_delayed_work(system_power_efficient_wq, 835 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); 836 837 return 0; 838 839 err_muic_irq: 840 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 841 i2c_unregister_device(max77843->i2c_muic); 842 843 return ret; 844 } 845 846 static int max77843_muic_remove(struct platform_device *pdev) 847 { 848 struct max77843_muic_info *info = platform_get_drvdata(pdev); 849 struct max77693_dev *max77843 = info->max77843; 850 851 cancel_work_sync(&info->irq_work); 852 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); 853 i2c_unregister_device(max77843->i2c_muic); 854 855 return 0; 856 } 857 858 static const struct platform_device_id max77843_muic_id[] = { 859 { "max77843-muic", }, 860 { /* sentinel */ }, 861 }; 862 MODULE_DEVICE_TABLE(platform, max77843_muic_id); 863 864 static struct platform_driver max77843_muic_driver = { 865 .driver = { 866 .name = "max77843-muic", 867 }, 868 .probe = max77843_muic_probe, 869 .remove = max77843_muic_remove, 870 .id_table = max77843_muic_id, 871 }; 872 873 static int __init max77843_muic_init(void) 874 { 875 return platform_driver_register(&max77843_muic_driver); 876 } 877 subsys_initcall(max77843_muic_init); 878 879 MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); 880 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>"); 881 MODULE_LICENSE("GPL"); 882