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