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1// SPDX-License-Identifier: GPL-2.0+2//3// extcon-max77843.c - Maxim MAX77843 extcon driver to support4// MUIC(Micro USB Interface Controller)5//6// Copyright (C) 2015 Samsung Electronics7// Author: Jaewon Kim <jaewon02.kim@samsung.com>8 9#include <linux/extcon-provider.h>10#include <linux/i2c.h>11#include <linux/interrupt.h>12#include <linux/kernel.h>13#include <linux/mfd/max77693-common.h>14#include <linux/mfd/max77843-private.h>15#include <linux/module.h>16#include <linux/platform_device.h>17#include <linux/workqueue.h>18 19#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */20 21enum max77843_muic_status {22 MAX77843_MUIC_STATUS1 = 0,23 MAX77843_MUIC_STATUS2,24 MAX77843_MUIC_STATUS3,25 26 MAX77843_MUIC_STATUS_NUM,27};28 29struct max77843_muic_info {30 struct device *dev;31 struct max77693_dev *max77843;32 struct extcon_dev *edev;33 34 struct mutex mutex;35 struct work_struct irq_work;36 struct delayed_work wq_detcable;37 38 u8 status[MAX77843_MUIC_STATUS_NUM];39 int prev_cable_type;40 int prev_chg_type;41 int prev_gnd_type;42 43 bool irq_adc;44 bool irq_chg;45};46 47enum max77843_muic_cable_group {48 MAX77843_CABLE_GROUP_ADC = 0,49 MAX77843_CABLE_GROUP_ADC_GND,50 MAX77843_CABLE_GROUP_CHG,51};52 53enum max77843_muic_adc_debounce_time {54 MAX77843_DEBOUNCE_TIME_5MS = 0,55 MAX77843_DEBOUNCE_TIME_10MS,56 MAX77843_DEBOUNCE_TIME_25MS,57 MAX77843_DEBOUNCE_TIME_38_62MS,58};59 60/* Define accessory cable type */61enum max77843_muic_accessory_type {62 MAX77843_MUIC_ADC_GROUND = 0,63 MAX77843_MUIC_ADC_SEND_END_BUTTON,64 MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,65 MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,66 MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,67 MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,68 MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,69 MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,70 MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,71 MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,72 MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,73 MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,74 MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,75 MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,76 MAX77843_MUIC_ADC_RESERVED_ACC_1,77 MAX77843_MUIC_ADC_RESERVED_ACC_2,78 MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */79 MAX77843_MUIC_ADC_RESERVED_ACC_4,80 MAX77843_MUIC_ADC_RESERVED_ACC_5,81 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,82 MAX77843_MUIC_ADC_PHONE_POWERED_DEV,83 MAX77843_MUIC_ADC_TTY_CONVERTER,84 MAX77843_MUIC_ADC_UART_CABLE,85 MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,86 MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,87 MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,88 MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,89 MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,90 MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,91 MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,92 MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,93 MAX77843_MUIC_ADC_OPEN,94 95 /*96 * The below accessories should check97 * not only ADC value but also ADC1K and VBVolt value.98 */99 /* Offset|ADC1K|VBVolt| */100 MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */101 MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */102 MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */103 MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */104};105 106/* Define charger cable type */107enum max77843_muic_charger_type {108 MAX77843_MUIC_CHG_NONE = 0,109 MAX77843_MUIC_CHG_USB,110 MAX77843_MUIC_CHG_DOWNSTREAM,111 MAX77843_MUIC_CHG_DEDICATED,112 MAX77843_MUIC_CHG_SPECIAL_500MA,113 MAX77843_MUIC_CHG_SPECIAL_1A,114 MAX77843_MUIC_CHG_SPECIAL_BIAS,115 MAX77843_MUIC_CHG_RESERVED,116 MAX77843_MUIC_CHG_GND,117 MAX77843_MUIC_CHG_DOCK,118};119 120static const unsigned int max77843_extcon_cable[] = {121 EXTCON_USB,122 EXTCON_USB_HOST,123 EXTCON_CHG_USB_SDP,124 EXTCON_CHG_USB_DCP,125 EXTCON_CHG_USB_CDP,126 EXTCON_CHG_USB_FAST,127 EXTCON_CHG_USB_SLOW,128 EXTCON_DISP_MHL,129 EXTCON_DOCK,130 EXTCON_JIG,131 EXTCON_NONE,132};133 134struct max77843_muic_irq {135 unsigned int irq;136 const char *name;137 unsigned int virq;138};139 140static 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 159static 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 165static 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 189static const struct regmap_irq_chip max77843_muic_irq_chip = {190 .name = "max77843-muic",191 .status_base = MAX77843_MUIC_REG_INT1,192 .unmask_base = MAX77843_MUIC_REG_INTMASK1,193 .num_regs = 3,194 .irqs = max77843_muic_irq,195 .num_irqs = ARRAY_SIZE(max77843_muic_irq),196};197 198static int max77843_muic_set_path(struct max77843_muic_info *info,199 u8 val, bool attached, bool nobccomp)200{201 struct max77693_dev *max77843 = info->max77843;202 int ret = 0;203 unsigned int ctrl1, ctrl2;204 205 if (attached)206 ctrl1 = val;207 else208 ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN;209 if (nobccomp) {210 /* Disable BC1.2 protocol and force manual switch control */211 ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK;212 }213 214 ret = regmap_update_bits(max77843->regmap_muic,215 MAX77843_MUIC_REG_CONTROL1,216 MAX77843_MUIC_CONTROL1_COM_SW |217 MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK,218 ctrl1);219 if (ret < 0) {220 dev_err(info->dev, "Cannot switch MUIC port\n");221 return ret;222 }223 224 if (attached)225 ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK;226 else227 ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK;228 229 ret = regmap_update_bits(max77843->regmap_muic,230 MAX77843_MUIC_REG_CONTROL2,231 MAX77843_MUIC_CONTROL2_LOWPWR_MASK |232 MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2);233 if (ret < 0) {234 dev_err(info->dev, "Cannot update lowpower mode\n");235 return ret;236 }237 238 dev_dbg(info->dev,239 "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",240 ctrl1, ctrl2, attached ? "attached" : "detached");241 242 return 0;243}244 245static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info,246 bool on)247{248 struct max77693_dev *max77843 = info->max77843;249 unsigned int cnfg00;250 251 if (on)252 cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK;253 else254 cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK;255 256 regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00,257 MAX77843_CHG_MODE_MASK, cnfg00);258}259 260static int max77843_muic_get_cable_type(struct max77843_muic_info *info,261 enum max77843_muic_cable_group group, bool *attached)262{263 int adc, chg_type, cable_type, gnd_type;264 265 adc = info->status[MAX77843_MUIC_STATUS1] &266 MAX77843_MUIC_STATUS1_ADC_MASK;267 adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT;268 269 switch (group) {270 case MAX77843_CABLE_GROUP_ADC:271 if (adc == MAX77843_MUIC_ADC_OPEN) {272 *attached = false;273 cable_type = info->prev_cable_type;274 info->prev_cable_type = MAX77843_MUIC_ADC_OPEN;275 } else {276 *attached = true;277 cable_type = info->prev_cable_type = adc;278 }279 break;280 case MAX77843_CABLE_GROUP_CHG:281 chg_type = info->status[MAX77843_MUIC_STATUS2] &282 MAX77843_MUIC_STATUS2_CHGTYP_MASK;283 284 /* Check GROUND accessory with charger cable */285 if (adc == MAX77843_MUIC_ADC_GROUND) {286 if (chg_type == MAX77843_MUIC_CHG_NONE) {287 /*288 * The following state when charger cable is289 * disconnected but the GROUND accessory still290 * connected.291 */292 *attached = false;293 cable_type = info->prev_chg_type;294 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;295 } else {296 297 /*298 * The following state when charger cable is299 * connected on the GROUND accessory.300 */301 *attached = true;302 cable_type = MAX77843_MUIC_CHG_GND;303 info->prev_chg_type = MAX77843_MUIC_CHG_GND;304 }305 break;306 }307 308 if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */309 if (chg_type == MAX77843_MUIC_CHG_NONE) {310 *attached = false;311 cable_type = info->prev_chg_type;312 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;313 } else {314 *attached = true;315 cable_type = MAX77843_MUIC_CHG_DOCK;316 info->prev_chg_type = MAX77843_MUIC_CHG_DOCK;317 }318 break;319 }320 321 if (chg_type == MAX77843_MUIC_CHG_NONE) {322 *attached = false;323 cable_type = info->prev_chg_type;324 info->prev_chg_type = MAX77843_MUIC_CHG_NONE;325 } else {326 *attached = true;327 cable_type = info->prev_chg_type = chg_type;328 }329 break;330 case MAX77843_CABLE_GROUP_ADC_GND:331 if (adc == MAX77843_MUIC_ADC_OPEN) {332 *attached = false;333 cable_type = info->prev_gnd_type;334 info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN;335 } else {336 *attached = true;337 338 /*339 * Offset|ADC1K|VBVolt|340 * 0x1| 0| 0| USB-HOST341 * 0x1| 0| 1| USB-HOST with VB342 * 0x1| 1| 0| MHL343 * 0x1| 1| 1| MHL with VB344 */345 /* Get ADC1K register bit */346 gnd_type = (info->status[MAX77843_MUIC_STATUS1] &347 MAX77843_MUIC_STATUS1_ADC1K_MASK);348 349 /* Get VBVolt register bit */350 gnd_type |= (info->status[MAX77843_MUIC_STATUS2] &351 MAX77843_MUIC_STATUS2_VBVOLT_MASK);352 gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT;353 354 /* Offset of GND cable */355 gnd_type |= MAX77843_MUIC_GND_USB_HOST;356 cable_type = info->prev_gnd_type = gnd_type;357 }358 break;359 default:360 dev_err(info->dev, "Unknown cable group (%d)\n", group);361 cable_type = -EINVAL;362 break;363 }364 365 return cable_type;366}367 368static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info)369{370 int ret, gnd_cable_type;371 bool attached;372 373 gnd_cable_type = max77843_muic_get_cable_type(info,374 MAX77843_CABLE_GROUP_ADC_GND, &attached);375 dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n",376 attached ? "attached" : "detached", gnd_cable_type);377 378 switch (gnd_cable_type) {379 case MAX77843_MUIC_GND_USB_HOST:380 case MAX77843_MUIC_GND_USB_HOST_VB:381 ret = max77843_muic_set_path(info,382 MAX77843_MUIC_CONTROL1_SW_USB,383 attached, false);384 if (ret < 0)385 return ret;386 387 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);388 max77843_charger_set_otg_vbus(info, attached);389 break;390 case MAX77843_MUIC_GND_MHL_VB:391 case MAX77843_MUIC_GND_MHL:392 ret = max77843_muic_set_path(info,393 MAX77843_MUIC_CONTROL1_SW_OPEN,394 attached, false);395 if (ret < 0)396 return ret;397 398 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);399 break;400 default:401 dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n",402 attached ? "attached" : "detached", gnd_cable_type);403 return -EINVAL;404 }405 406 return 0;407}408 409static int max77843_muic_jig_handler(struct max77843_muic_info *info,410 int cable_type, bool attached)411{412 int ret;413 u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN;414 415 dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n",416 attached ? "attached" : "detached", cable_type);417 418 switch (cable_type) {419 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:420 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:421 path = MAX77843_MUIC_CONTROL1_SW_USB;422 break;423 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:424 path = MAX77843_MUIC_CONTROL1_SW_UART;425 break;426 default:427 return -EINVAL;428 }429 430 ret = max77843_muic_set_path(info, path, attached, false);431 if (ret < 0)432 return ret;433 434 extcon_set_state_sync(info->edev, EXTCON_JIG, attached);435 436 return 0;437}438 439static int max77843_muic_dock_handler(struct max77843_muic_info *info,440 bool attached)441{442 int ret;443 444 dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n",445 attached ? "attached" : "detached");446 447 ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB,448 attached, attached);449 if (ret < 0)450 return ret;451 452 extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached);453 extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached);454 extcon_set_state_sync(info->edev, EXTCON_DOCK, attached);455 456 return 0;457}458 459static int max77843_muic_adc_handler(struct max77843_muic_info *info)460{461 int ret, cable_type;462 bool attached;463 464 cable_type = max77843_muic_get_cable_type(info,465 MAX77843_CABLE_GROUP_ADC, &attached);466 467 dev_dbg(info->dev,468 "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",469 attached ? "attached" : "detached", cable_type,470 info->prev_cable_type);471 472 switch (cable_type) {473 case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */474 ret = max77843_muic_dock_handler(info, attached);475 if (ret < 0)476 return ret;477 break;478 case MAX77843_MUIC_ADC_GROUND:479 ret = max77843_muic_adc_gnd_handler(info);480 if (ret < 0)481 return ret;482 break;483 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF:484 case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON:485 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF:486 ret = max77843_muic_jig_handler(info, cable_type, attached);487 if (ret < 0)488 return ret;489 break;490 case MAX77843_MUIC_ADC_SEND_END_BUTTON:491 case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON:492 case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON:493 case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON:494 case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON:495 case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON:496 case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON:497 case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON:498 case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON:499 case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON:500 case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON:501 case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON:502 case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON:503 case MAX77843_MUIC_ADC_RESERVED_ACC_1:504 case MAX77843_MUIC_ADC_RESERVED_ACC_2:505 case MAX77843_MUIC_ADC_RESERVED_ACC_4:506 case MAX77843_MUIC_ADC_RESERVED_ACC_5:507 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2:508 case MAX77843_MUIC_ADC_PHONE_POWERED_DEV:509 case MAX77843_MUIC_ADC_TTY_CONVERTER:510 case MAX77843_MUIC_ADC_UART_CABLE:511 case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG:512 case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD:513 case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG:514 case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON:515 case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1:516 case MAX77843_MUIC_ADC_OPEN:517 dev_err(info->dev,518 "accessory is %s but it isn't used (adc:0x%x)\n",519 attached ? "attached" : "detached", cable_type);520 return -EAGAIN;521 default:522 dev_err(info->dev,523 "failed to detect %s accessory (adc:0x%x)\n",524 attached ? "attached" : "detached", cable_type);525 return -EINVAL;526 }527 528 return 0;529}530 531static int max77843_muic_chg_handler(struct max77843_muic_info *info)532{533 int ret, chg_type, gnd_type;534 bool attached;535 536 chg_type = max77843_muic_get_cable_type(info,537 MAX77843_CABLE_GROUP_CHG, &attached);538 539 dev_dbg(info->dev,540 "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",541 attached ? "attached" : "detached",542 chg_type, info->prev_chg_type);543 544 switch (chg_type) {545 case MAX77843_MUIC_CHG_USB:546 ret = max77843_muic_set_path(info,547 MAX77843_MUIC_CONTROL1_SW_USB,548 attached, false);549 if (ret < 0)550 return ret;551 552 extcon_set_state_sync(info->edev, EXTCON_USB, attached);553 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP,554 attached);555 break;556 case MAX77843_MUIC_CHG_DOWNSTREAM:557 ret = max77843_muic_set_path(info,558 MAX77843_MUIC_CONTROL1_SW_OPEN,559 attached, false);560 if (ret < 0)561 return ret;562 563 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP,564 attached);565 break;566 case MAX77843_MUIC_CHG_DEDICATED:567 ret = max77843_muic_set_path(info,568 MAX77843_MUIC_CONTROL1_SW_OPEN,569 attached, false);570 if (ret < 0)571 return ret;572 573 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,574 attached);575 break;576 case MAX77843_MUIC_CHG_SPECIAL_500MA:577 ret = max77843_muic_set_path(info,578 MAX77843_MUIC_CONTROL1_SW_OPEN,579 attached, false);580 if (ret < 0)581 return ret;582 583 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW,584 attached);585 break;586 case MAX77843_MUIC_CHG_SPECIAL_1A:587 ret = max77843_muic_set_path(info,588 MAX77843_MUIC_CONTROL1_SW_OPEN,589 attached, false);590 if (ret < 0)591 return ret;592 593 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST,594 attached);595 break;596 case MAX77843_MUIC_CHG_GND:597 gnd_type = max77843_muic_get_cable_type(info,598 MAX77843_CABLE_GROUP_ADC_GND, &attached);599 600 /* Charger cable on MHL accessory is attach or detach */601 if (gnd_type == MAX77843_MUIC_GND_MHL_VB)602 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,603 true);604 else if (gnd_type == MAX77843_MUIC_GND_MHL)605 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP,606 false);607 break;608 case MAX77843_MUIC_CHG_DOCK:609 extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached);610 break;611 case MAX77843_MUIC_CHG_NONE:612 break;613 default:614 dev_err(info->dev,615 "failed to detect %s accessory (chg_type:0x%x)\n",616 attached ? "attached" : "detached", chg_type);617 618 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN,619 attached, false);620 return -EINVAL;621 }622 623 return 0;624}625 626static void max77843_muic_irq_work(struct work_struct *work)627{628 struct max77843_muic_info *info = container_of(work,629 struct max77843_muic_info, irq_work);630 struct max77693_dev *max77843 = info->max77843;631 int ret = 0;632 633 mutex_lock(&info->mutex);634 635 ret = regmap_bulk_read(max77843->regmap_muic,636 MAX77843_MUIC_REG_STATUS1, info->status,637 MAX77843_MUIC_STATUS_NUM);638 if (ret) {639 dev_err(info->dev, "Cannot read STATUS registers\n");640 mutex_unlock(&info->mutex);641 return;642 }643 644 if (info->irq_adc) {645 ret = max77843_muic_adc_handler(info);646 if (ret)647 dev_err(info->dev, "Unknown cable type\n");648 info->irq_adc = false;649 }650 651 if (info->irq_chg) {652 ret = max77843_muic_chg_handler(info);653 if (ret)654 dev_err(info->dev, "Unknown charger type\n");655 info->irq_chg = false;656 }657 658 mutex_unlock(&info->mutex);659}660 661static irqreturn_t max77843_muic_irq_handler(int irq, void *data)662{663 struct max77843_muic_info *info = data;664 int i, irq_type = -1;665 666 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++)667 if (irq == max77843_muic_irqs[i].virq)668 irq_type = max77843_muic_irqs[i].irq;669 670 switch (irq_type) {671 case MAX77843_MUIC_IRQ_INT1_ADC:672 case MAX77843_MUIC_IRQ_INT1_ADCERROR:673 case MAX77843_MUIC_IRQ_INT1_ADC1K:674 info->irq_adc = true;675 break;676 case MAX77843_MUIC_IRQ_INT2_CHGTYP:677 case MAX77843_MUIC_IRQ_INT2_CHGDETRUN:678 case MAX77843_MUIC_IRQ_INT2_DCDTMR:679 case MAX77843_MUIC_IRQ_INT2_DXOVP:680 case MAX77843_MUIC_IRQ_INT2_VBVOLT:681 info->irq_chg = true;682 break;683 case MAX77843_MUIC_IRQ_INT3_VBADC:684 case MAX77843_MUIC_IRQ_INT3_VDNMON:685 case MAX77843_MUIC_IRQ_INT3_DNRES:686 case MAX77843_MUIC_IRQ_INT3_MPNACK:687 case MAX77843_MUIC_IRQ_INT3_MRXBUFOW:688 case MAX77843_MUIC_IRQ_INT3_MRXTRF:689 case MAX77843_MUIC_IRQ_INT3_MRXPERR:690 case MAX77843_MUIC_IRQ_INT3_MRXRDY:691 break;692 default:693 dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type);694 break;695 }696 697 schedule_work(&info->irq_work);698 699 return IRQ_HANDLED;700}701 702static void max77843_muic_detect_cable_wq(struct work_struct *work)703{704 struct max77843_muic_info *info = container_of(to_delayed_work(work),705 struct max77843_muic_info, wq_detcable);706 struct max77693_dev *max77843 = info->max77843;707 int chg_type, adc, ret;708 bool attached;709 710 mutex_lock(&info->mutex);711 712 ret = regmap_bulk_read(max77843->regmap_muic,713 MAX77843_MUIC_REG_STATUS1, info->status,714 MAX77843_MUIC_STATUS_NUM);715 if (ret) {716 dev_err(info->dev, "Cannot read STATUS registers\n");717 goto err_cable_wq;718 }719 720 adc = max77843_muic_get_cable_type(info,721 MAX77843_CABLE_GROUP_ADC, &attached);722 if (attached && adc != MAX77843_MUIC_ADC_OPEN) {723 ret = max77843_muic_adc_handler(info);724 if (ret < 0) {725 dev_err(info->dev, "Cannot detect accessory\n");726 goto err_cable_wq;727 }728 }729 730 chg_type = max77843_muic_get_cable_type(info,731 MAX77843_CABLE_GROUP_CHG, &attached);732 if (attached && chg_type != MAX77843_MUIC_CHG_NONE) {733 ret = max77843_muic_chg_handler(info);734 if (ret < 0) {735 dev_err(info->dev, "Cannot detect charger accessory\n");736 goto err_cable_wq;737 }738 }739 740err_cable_wq:741 mutex_unlock(&info->mutex);742}743 744static int max77843_muic_set_debounce_time(struct max77843_muic_info *info,745 enum max77843_muic_adc_debounce_time time)746{747 struct max77693_dev *max77843 = info->max77843;748 int ret;749 750 switch (time) {751 case MAX77843_DEBOUNCE_TIME_5MS:752 case MAX77843_DEBOUNCE_TIME_10MS:753 case MAX77843_DEBOUNCE_TIME_25MS:754 case MAX77843_DEBOUNCE_TIME_38_62MS:755 ret = regmap_update_bits(max77843->regmap_muic,756 MAX77843_MUIC_REG_CONTROL4,757 MAX77843_MUIC_CONTROL4_ADCDBSET_MASK,758 time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT);759 if (ret < 0) {760 dev_err(info->dev, "Cannot write MUIC regmap\n");761 return ret;762 }763 break;764 default:765 dev_err(info->dev, "Invalid ADC debounce time\n");766 return -EINVAL;767 }768 769 return 0;770}771 772static int max77843_init_muic_regmap(struct max77693_dev *max77843)773{774 int ret;775 776 max77843->i2c_muic = i2c_new_dummy_device(max77843->i2c->adapter,777 I2C_ADDR_MUIC);778 if (IS_ERR(max77843->i2c_muic)) {779 dev_err(&max77843->i2c->dev,780 "Cannot allocate I2C device for MUIC\n");781 return PTR_ERR(max77843->i2c_muic);782 }783 784 i2c_set_clientdata(max77843->i2c_muic, max77843);785 786 max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic,787 &max77843_muic_regmap_config);788 if (IS_ERR(max77843->regmap_muic)) {789 ret = PTR_ERR(max77843->regmap_muic);790 goto err_muic_i2c;791 }792 793 ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq,794 IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,795 0, &max77843_muic_irq_chip, &max77843->irq_data_muic);796 if (ret < 0) {797 dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n");798 goto err_muic_i2c;799 }800 801 return 0;802 803err_muic_i2c:804 i2c_unregister_device(max77843->i2c_muic);805 806 return ret;807}808 809static int max77843_muic_probe(struct platform_device *pdev)810{811 struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent);812 struct max77843_muic_info *info;813 unsigned int id;814 int cable_type;815 bool attached;816 int i, ret;817 818 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);819 if (!info)820 return -ENOMEM;821 822 info->dev = &pdev->dev;823 info->max77843 = max77843;824 825 platform_set_drvdata(pdev, info);826 mutex_init(&info->mutex);827 828 /* Initialize i2c and regmap */829 ret = max77843_init_muic_regmap(max77843);830 if (ret) {831 dev_err(&pdev->dev, "Failed to init MUIC regmap\n");832 return ret;833 }834 835 /* Turn off auto detection configuration */836 ret = regmap_update_bits(max77843->regmap_muic,837 MAX77843_MUIC_REG_CONTROL4,838 MAX77843_MUIC_CONTROL4_USBAUTO_MASK |839 MAX77843_MUIC_CONTROL4_FCTAUTO_MASK,840 CONTROL4_AUTO_DISABLE);841 842 /* Initialize extcon device */843 info->edev = devm_extcon_dev_allocate(&pdev->dev,844 max77843_extcon_cable);845 if (IS_ERR(info->edev)) {846 dev_err(&pdev->dev, "Failed to allocate memory for extcon\n");847 ret = PTR_ERR(info->edev);848 goto err_muic_irq;849 }850 851 ret = devm_extcon_dev_register(&pdev->dev, info->edev);852 if (ret) {853 dev_err(&pdev->dev, "Failed to register extcon device\n");854 goto err_muic_irq;855 }856 857 /* Set ADC debounce time */858 max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS);859 860 /* Set initial path for UART when JIG is connected to get serial logs */861 ret = regmap_bulk_read(max77843->regmap_muic,862 MAX77843_MUIC_REG_STATUS1, info->status,863 MAX77843_MUIC_STATUS_NUM);864 if (ret) {865 dev_err(info->dev, "Cannot read STATUS registers\n");866 goto err_muic_irq;867 }868 cable_type = max77843_muic_get_cable_type(info, MAX77843_CABLE_GROUP_ADC,869 &attached);870 if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF)871 max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART,872 true, false);873 874 /* Check revision number of MUIC device */875 ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id);876 if (ret < 0) {877 dev_err(&pdev->dev, "Failed to read revision number\n");878 goto err_muic_irq;879 }880 dev_info(info->dev, "MUIC device ID : 0x%x\n", id);881 882 /* Support virtual irq domain for max77843 MUIC device */883 INIT_WORK(&info->irq_work, max77843_muic_irq_work);884 885 /* Clear IRQ bits before request IRQs */886 ret = regmap_bulk_read(max77843->regmap_muic,887 MAX77843_MUIC_REG_INT1, info->status,888 MAX77843_MUIC_STATUS_NUM);889 if (ret) {890 dev_err(&pdev->dev, "Failed to Clear IRQ bits\n");891 goto err_muic_irq;892 }893 894 for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) {895 struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i];896 int virq = 0;897 898 virq = regmap_irq_get_virq(max77843->irq_data_muic,899 muic_irq->irq);900 if (virq <= 0) {901 ret = -EINVAL;902 goto err_muic_irq;903 }904 muic_irq->virq = virq;905 906 ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,907 max77843_muic_irq_handler, IRQF_NO_SUSPEND,908 muic_irq->name, info);909 if (ret) {910 dev_err(&pdev->dev,911 "Failed to request irq (IRQ: %d, error: %d)\n",912 muic_irq->irq, ret);913 goto err_muic_irq;914 }915 }916 917 /* Detect accessory after completing the initialization of platform */918 INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq);919 queue_delayed_work(system_power_efficient_wq,920 &info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT));921 922 return 0;923 924err_muic_irq:925 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);926 i2c_unregister_device(max77843->i2c_muic);927 928 return ret;929}930 931static void max77843_muic_remove(struct platform_device *pdev)932{933 struct max77843_muic_info *info = platform_get_drvdata(pdev);934 struct max77693_dev *max77843 = info->max77843;935 936 cancel_work_sync(&info->irq_work);937 regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic);938 i2c_unregister_device(max77843->i2c_muic);939}940 941static const struct platform_device_id max77843_muic_id[] = {942 { "max77843-muic", },943 { /* sentinel */ },944};945MODULE_DEVICE_TABLE(platform, max77843_muic_id);946 947static const struct of_device_id of_max77843_muic_dt_match[] = {948 { .compatible = "maxim,max77843-muic", },949 { /* sentinel */ },950};951MODULE_DEVICE_TABLE(of, of_max77843_muic_dt_match);952 953static struct platform_driver max77843_muic_driver = {954 .driver = {955 .name = "max77843-muic",956 .of_match_table = of_max77843_muic_dt_match,957 },958 .probe = max77843_muic_probe,959 .remove_new = max77843_muic_remove,960 .id_table = max77843_muic_id,961};962 963static int __init max77843_muic_init(void)964{965 return platform_driver_register(&max77843_muic_driver);966}967subsys_initcall(max77843_muic_init);968 969MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver");970MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");971MODULE_LICENSE("GPL");972