12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265 |
- /*
- * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC
- *
- * Copyright (C) 2012 Samsung Electrnoics
- * Chanwoo Choi <cw00.choi@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/i2c.h>
- #include <linux/slab.h>
- #include <linux/input.h>
- #include <linux/interrupt.h>
- #include <linux/err.h>
- #include <linux/platform_device.h>
- #include <linux/mfd/max77693.h>
- #include <linux/mfd/max77693-common.h>
- #include <linux/mfd/max77693-private.h>
- #include <linux/extcon.h>
- #include <linux/regmap.h>
- #include <linux/irqdomain.h>
- #define DEV_NAME "max77693-muic"
- #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */
- /*
- * Default value of MAX77693 register to bring up MUIC device.
- * If user don't set some initial value for MUIC device through platform data,
- * extcon-max77693 driver use 'default_init_data' to bring up base operation
- * of MAX77693 MUIC device.
- */
- static struct max77693_reg_data default_init_data[] = {
- {
- /* STATUS2 - [3]ChgDetRun */
- .addr = MAX77693_MUIC_REG_STATUS2,
- .data = MAX77693_STATUS2_CHGDETRUN_MASK,
- }, {
- /* INTMASK1 - Unmask [3]ADC1KM,[0]ADCM */
- .addr = MAX77693_MUIC_REG_INTMASK1,
- .data = INTMASK1_ADC1K_MASK
- | INTMASK1_ADC_MASK,
- }, {
- /* INTMASK2 - Unmask [0]ChgTypM */
- .addr = MAX77693_MUIC_REG_INTMASK2,
- .data = INTMASK2_CHGTYP_MASK,
- }, {
- /* INTMASK3 - Mask all of interrupts */
- .addr = MAX77693_MUIC_REG_INTMASK3,
- .data = 0x0,
- }, {
- /* CDETCTRL2 */
- .addr = MAX77693_MUIC_REG_CDETCTRL2,
- .data = CDETCTRL2_VIDRMEN_MASK
- | CDETCTRL2_DXOVPEN_MASK,
- },
- };
- enum max77693_muic_adc_debounce_time {
- ADC_DEBOUNCE_TIME_5MS = 0,
- ADC_DEBOUNCE_TIME_10MS,
- ADC_DEBOUNCE_TIME_25MS,
- ADC_DEBOUNCE_TIME_38_62MS,
- };
- struct max77693_muic_info {
- struct device *dev;
- struct max77693_dev *max77693;
- struct extcon_dev *edev;
- int prev_cable_type;
- int prev_cable_type_gnd;
- int prev_chg_type;
- int prev_button_type;
- u8 status[2];
- int irq;
- struct work_struct irq_work;
- struct mutex mutex;
- /*
- * Use delayed workqueue to detect cable state and then
- * notify cable state to notifiee/platform through uevent.
- * After completing the booting of platform, the extcon provider
- * driver should notify cable state to upper layer.
- */
- struct delayed_work wq_detcable;
- /* Button of dock device */
- struct input_dev *dock;
- /*
- * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
- * h/w path of COMP2/COMN1 on CONTROL1 register.
- */
- int path_usb;
- int path_uart;
- };
- enum max77693_muic_cable_group {
- MAX77693_CABLE_GROUP_ADC = 0,
- MAX77693_CABLE_GROUP_ADC_GND,
- MAX77693_CABLE_GROUP_CHG,
- MAX77693_CABLE_GROUP_VBVOLT,
- };
- enum max77693_muic_charger_type {
- MAX77693_CHARGER_TYPE_NONE = 0,
- MAX77693_CHARGER_TYPE_USB,
- MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT,
- MAX77693_CHARGER_TYPE_DEDICATED_CHG,
- MAX77693_CHARGER_TYPE_APPLE_500MA,
- MAX77693_CHARGER_TYPE_APPLE_1A_2A,
- MAX77693_CHARGER_TYPE_DEAD_BATTERY = 7,
- };
- /**
- * struct max77693_muic_irq
- * @irq: the index of irq list of MUIC device.
- * @name: the name of irq.
- * @virq: the virtual irq to use irq domain
- */
- struct max77693_muic_irq {
- unsigned int irq;
- const char *name;
- unsigned int virq;
- };
- static struct max77693_muic_irq muic_irqs[] = {
- { MAX77693_MUIC_IRQ_INT1_ADC, "muic-ADC" },
- { MAX77693_MUIC_IRQ_INT1_ADC_LOW, "muic-ADCLOW" },
- { MAX77693_MUIC_IRQ_INT1_ADC_ERR, "muic-ADCError" },
- { MAX77693_MUIC_IRQ_INT1_ADC1K, "muic-ADC1K" },
- { MAX77693_MUIC_IRQ_INT2_CHGTYP, "muic-CHGTYP" },
- { MAX77693_MUIC_IRQ_INT2_CHGDETREUN, "muic-CHGDETREUN" },
- { MAX77693_MUIC_IRQ_INT2_DCDTMR, "muic-DCDTMR" },
- { MAX77693_MUIC_IRQ_INT2_DXOVP, "muic-DXOVP" },
- { MAX77693_MUIC_IRQ_INT2_VBVOLT, "muic-VBVOLT" },
- { MAX77693_MUIC_IRQ_INT2_VIDRM, "muic-VIDRM" },
- { MAX77693_MUIC_IRQ_INT3_EOC, "muic-EOC" },
- { MAX77693_MUIC_IRQ_INT3_CGMBC, "muic-CGMBC" },
- { MAX77693_MUIC_IRQ_INT3_OVP, "muic-OVP" },
- { MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR, "muic-MBCCHG_ERR" },
- { MAX77693_MUIC_IRQ_INT3_CHG_ENABLED, "muic-CHG_ENABLED" },
- { MAX77693_MUIC_IRQ_INT3_BAT_DET, "muic-BAT_DET" },
- };
- /* Define supported accessory type */
- enum max77693_muic_acc_type {
- MAX77693_MUIC_ADC_GROUND = 0x0,
- MAX77693_MUIC_ADC_SEND_END_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S1_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S2_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S3_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S4_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S5_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S6_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S7_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S8_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S9_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S10_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S11_BUTTON,
- MAX77693_MUIC_ADC_REMOTE_S12_BUTTON,
- MAX77693_MUIC_ADC_RESERVED_ACC_1,
- MAX77693_MUIC_ADC_RESERVED_ACC_2,
- MAX77693_MUIC_ADC_RESERVED_ACC_3,
- MAX77693_MUIC_ADC_RESERVED_ACC_4,
- MAX77693_MUIC_ADC_RESERVED_ACC_5,
- MAX77693_MUIC_ADC_CEA936_AUDIO,
- MAX77693_MUIC_ADC_PHONE_POWERED_DEV,
- MAX77693_MUIC_ADC_TTY_CONVERTER,
- MAX77693_MUIC_ADC_UART_CABLE,
- MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG,
- MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF,
- MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON,
- MAX77693_MUIC_ADC_AV_CABLE_NOLOAD,
- MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG,
- MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF,
- MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON,
- MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE,
- MAX77693_MUIC_ADC_OPEN,
- /* The below accessories have same ADC value so ADCLow and
- ADC1K bit is used to separate specific accessory */
- /* ADC|VBVolot|ADCLow|ADC1K| */
- MAX77693_MUIC_GND_USB_HOST = 0x100, /* 0x0| 0| 0| 0| */
- MAX77693_MUIC_GND_USB_HOST_VB = 0x104, /* 0x0| 1| 0| 0| */
- MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* 0x0| 0| 1| 0| */
- MAX77693_MUIC_GND_MHL = 0x103, /* 0x0| 0| 1| 1| */
- MAX77693_MUIC_GND_MHL_VB = 0x107, /* 0x0| 1| 1| 1| */
- };
- /*
- * MAX77693 MUIC device support below list of accessories(external connector)
- */
- static const unsigned int max77693_extcon_cable[] = {
- EXTCON_USB,
- EXTCON_USB_HOST,
- EXTCON_CHG_USB_DCP,
- EXTCON_CHG_USB_FAST,
- EXTCON_CHG_USB_SLOW,
- EXTCON_CHG_USB_CDP,
- EXTCON_DISP_MHL,
- EXTCON_JIG,
- EXTCON_DOCK,
- EXTCON_NONE,
- };
- /*
- * max77693_muic_set_debounce_time - Set the debounce time of ADC
- * @info: the instance including private data of max77693 MUIC
- * @time: the debounce time of ADC
- */
- static int max77693_muic_set_debounce_time(struct max77693_muic_info *info,
- enum max77693_muic_adc_debounce_time time)
- {
- int ret;
- switch (time) {
- case ADC_DEBOUNCE_TIME_5MS:
- case ADC_DEBOUNCE_TIME_10MS:
- case ADC_DEBOUNCE_TIME_25MS:
- case ADC_DEBOUNCE_TIME_38_62MS:
- /*
- * Don't touch BTLDset, JIGset when you want to change adc
- * debounce time. If it writes other than 0 to BTLDset, JIGset
- * muic device will be reset and loose current state.
- */
- ret = regmap_write(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_CTRL3,
- time << MAX77693_CONTROL3_ADCDBSET_SHIFT);
- if (ret) {
- dev_err(info->dev, "failed to set ADC debounce time\n");
- return ret;
- }
- break;
- default:
- dev_err(info->dev, "invalid ADC debounce time\n");
- return -EINVAL;
- }
- return 0;
- };
- /*
- * max77693_muic_set_path - Set hardware line according to attached cable
- * @info: the instance including private data of max77693 MUIC
- * @value: the path according to attached cable
- * @attached: the state of cable (true:attached, false:detached)
- *
- * The max77693 MUIC device share outside H/W line among a varity of cables
- * so, this function set internal path of H/W line according to the type of
- * attached cable.
- */
- static int max77693_muic_set_path(struct max77693_muic_info *info,
- u8 val, bool attached)
- {
- int ret = 0;
- unsigned int ctrl1, ctrl2 = 0;
- if (attached)
- ctrl1 = val;
- else
- ctrl1 = MAX77693_CONTROL1_SW_OPEN;
- ret = regmap_update_bits(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_CTRL1, COMP_SW_MASK, ctrl1);
- if (ret < 0) {
- dev_err(info->dev, "failed to update MUIC register\n");
- return ret;
- }
- if (attached)
- ctrl2 |= MAX77693_CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
- else
- ctrl2 |= MAX77693_CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
- ret = regmap_update_bits(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_CTRL2,
- MAX77693_CONTROL2_LOWPWR_MASK | MAX77693_CONTROL2_CPEN_MASK,
- ctrl2);
- if (ret < 0) {
- dev_err(info->dev, "failed to update MUIC register\n");
- return ret;
- }
- dev_info(info->dev,
- "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n",
- ctrl1, ctrl2, attached ? "attached" : "detached");
- return 0;
- }
- /*
- * max77693_muic_get_cable_type - Return cable type and check cable state
- * @info: the instance including private data of max77693 MUIC
- * @group: the path according to attached cable
- * @attached: store cable state and return
- *
- * This function check the cable state either attached or detached,
- * and then divide precise type of cable according to cable group.
- * - MAX77693_CABLE_GROUP_ADC
- * - MAX77693_CABLE_GROUP_ADC_GND
- * - MAX77693_CABLE_GROUP_CHG
- * - MAX77693_CABLE_GROUP_VBVOLT
- */
- static int max77693_muic_get_cable_type(struct max77693_muic_info *info,
- enum max77693_muic_cable_group group, bool *attached)
- {
- int cable_type = 0;
- int adc;
- int adc1k;
- int adclow;
- int vbvolt;
- int chg_type;
- switch (group) {
- case MAX77693_CABLE_GROUP_ADC:
- /*
- * Read ADC value to check cable type and decide cable state
- * according to cable type
- */
- adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
- adc >>= MAX77693_STATUS1_ADC_SHIFT;
- /*
- * Check current cable state/cable type and store cable type
- * (info->prev_cable_type) for handling cable when cable is
- * detached.
- */
- if (adc == MAX77693_MUIC_ADC_OPEN) {
- *attached = false;
- cable_type = info->prev_cable_type;
- info->prev_cable_type = MAX77693_MUIC_ADC_OPEN;
- } else {
- *attached = true;
- cable_type = info->prev_cable_type = adc;
- }
- break;
- case MAX77693_CABLE_GROUP_ADC_GND:
- /*
- * Read ADC value to check cable type and decide cable state
- * according to cable type
- */
- adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
- adc >>= MAX77693_STATUS1_ADC_SHIFT;
- /*
- * Check current cable state/cable type and store cable type
- * (info->prev_cable_type/_gnd) for handling cable when cable
- * is detached.
- */
- if (adc == MAX77693_MUIC_ADC_OPEN) {
- *attached = false;
- cable_type = info->prev_cable_type_gnd;
- info->prev_cable_type_gnd = MAX77693_MUIC_ADC_OPEN;
- } else {
- *attached = true;
- adclow = info->status[0] & MAX77693_STATUS1_ADCLOW_MASK;
- adclow >>= MAX77693_STATUS1_ADCLOW_SHIFT;
- adc1k = info->status[0] & MAX77693_STATUS1_ADC1K_MASK;
- adc1k >>= MAX77693_STATUS1_ADC1K_SHIFT;
- vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
- vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
- /**
- * [0x1|VBVolt|ADCLow|ADC1K]
- * [0x1| 0| 0| 0] USB_HOST
- * [0x1| 1| 0| 0] USB_HSOT_VB
- * [0x1| 0| 1| 0] Audio Video cable with load
- * [0x1| 0| 1| 1] MHL without charging cable
- * [0x1| 1| 1| 1] MHL with charging cable
- */
- cable_type = ((0x1 << 8)
- | (vbvolt << 2)
- | (adclow << 1)
- | adc1k);
- info->prev_cable_type = adc;
- info->prev_cable_type_gnd = cable_type;
- }
- break;
- case MAX77693_CABLE_GROUP_CHG:
- /*
- * Read charger type to check cable type and decide cable state
- * according to type of charger cable.
- */
- chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
- chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
- if (chg_type == MAX77693_CHARGER_TYPE_NONE) {
- *attached = false;
- cable_type = info->prev_chg_type;
- info->prev_chg_type = MAX77693_CHARGER_TYPE_NONE;
- } else {
- *attached = true;
- /*
- * Check current cable state/cable type and store cable
- * type(info->prev_chg_type) for handling cable when
- * charger cable is detached.
- */
- cable_type = info->prev_chg_type = chg_type;
- }
- break;
- case MAX77693_CABLE_GROUP_VBVOLT:
- /*
- * Read ADC value to check cable type and decide cable state
- * according to cable type
- */
- adc = info->status[0] & MAX77693_STATUS1_ADC_MASK;
- adc >>= MAX77693_STATUS1_ADC_SHIFT;
- chg_type = info->status[1] & MAX77693_STATUS2_CHGTYP_MASK;
- chg_type >>= MAX77693_STATUS2_CHGTYP_SHIFT;
- if (adc == MAX77693_MUIC_ADC_OPEN
- && chg_type == MAX77693_CHARGER_TYPE_NONE)
- *attached = false;
- else
- *attached = true;
- /*
- * Read vbvolt field, if vbvolt is 1,
- * this cable is used for charging.
- */
- vbvolt = info->status[1] & MAX77693_STATUS2_VBVOLT_MASK;
- vbvolt >>= MAX77693_STATUS2_VBVOLT_SHIFT;
- cable_type = vbvolt;
- break;
- default:
- dev_err(info->dev, "Unknown cable group (%d)\n", group);
- cable_type = -EINVAL;
- break;
- }
- return cable_type;
- }
- static int max77693_muic_dock_handler(struct max77693_muic_info *info,
- int cable_type, bool attached)
- {
- int ret = 0;
- int vbvolt;
- bool cable_attached;
- unsigned int dock_id;
- dev_info(info->dev,
- "external connector is %s (adc:0x%02x)\n",
- attached ? "attached" : "detached", cable_type);
- switch (cable_type) {
- case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
- /*
- * Check power cable whether attached or detached state.
- * The Dock-Smart device need surely external power supply.
- * If power cable(USB/TA) isn't connected to Dock device,
- * user can't use Dock-Smart for desktop mode.
- */
- vbvolt = max77693_muic_get_cable_type(info,
- MAX77693_CABLE_GROUP_VBVOLT, &cable_attached);
- if (attached && !vbvolt) {
- dev_warn(info->dev,
- "Cannot detect external power supply\n");
- return 0;
- }
- /*
- * Notify Dock/MHL state.
- * - Dock device include three type of cable which
- * are HDMI, USB for mouse/keyboard and micro-usb port
- * for USB/TA cable. Dock device need always exteranl
- * power supply(USB/TA cable through micro-usb cable). Dock
- * device support screen output of target to separate
- * monitor and mouse/keyboard for desktop mode.
- *
- * Features of 'USB/TA cable with Dock device'
- * - Support MHL
- * - Support external output feature of audio
- * - Support charging through micro-usb port without data
- * connection if TA cable is connected to target.
- * - Support charging and data connection through micro-usb port
- * if USB cable is connected between target and host
- * device.
- * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
- */
- ret = max77693_muic_set_path(info, info->path_usb, attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, EXTCON_DOCK, attached);
- extcon_set_cable_state_(info->edev, EXTCON_DISP_MHL, attached);
- goto out;
- case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
- dock_id = EXTCON_DOCK;
- break;
- case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
- dock_id = EXTCON_DOCK;
- if (!attached)
- extcon_set_cable_state_(info->edev, EXTCON_USB, false);
- break;
- default:
- dev_err(info->dev, "failed to detect %s dock device\n",
- attached ? "attached" : "detached");
- return -EINVAL;
- }
- /* Dock-Car/Desk/Audio, PATH:AUDIO */
- ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
- attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, dock_id, attached);
- out:
- return 0;
- }
- static int max77693_muic_dock_button_handler(struct max77693_muic_info *info,
- int button_type, bool attached)
- {
- struct input_dev *dock = info->dock;
- unsigned int code;
- switch (button_type) {
- case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON-1
- ... MAX77693_MUIC_ADC_REMOTE_S3_BUTTON+1:
- /* DOCK_KEY_PREV */
- code = KEY_PREVIOUSSONG;
- break;
- case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON-1
- ... MAX77693_MUIC_ADC_REMOTE_S7_BUTTON+1:
- /* DOCK_KEY_NEXT */
- code = KEY_NEXTSONG;
- break;
- case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON:
- /* DOCK_VOL_DOWN */
- code = KEY_VOLUMEDOWN;
- break;
- case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON:
- /* DOCK_VOL_UP */
- code = KEY_VOLUMEUP;
- break;
- case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON-1
- ... MAX77693_MUIC_ADC_REMOTE_S12_BUTTON+1:
- /* DOCK_KEY_PLAY_PAUSE */
- code = KEY_PLAYPAUSE;
- break;
- default:
- dev_err(info->dev,
- "failed to detect %s key (adc:0x%x)\n",
- attached ? "pressed" : "released", button_type);
- return -EINVAL;
- }
- input_event(dock, EV_KEY, code, attached);
- input_sync(dock);
- return 0;
- }
- static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info)
- {
- int cable_type_gnd;
- int ret = 0;
- bool attached;
- cable_type_gnd = max77693_muic_get_cable_type(info,
- MAX77693_CABLE_GROUP_ADC_GND, &attached);
- switch (cable_type_gnd) {
- case MAX77693_MUIC_GND_USB_HOST:
- case MAX77693_MUIC_GND_USB_HOST_VB:
- /* USB_HOST, PATH: AP_USB */
- ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_USB,
- attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, EXTCON_USB_HOST, attached);
- break;
- case MAX77693_MUIC_GND_AV_CABLE_LOAD:
- /* Audio Video Cable with load, PATH:AUDIO */
- ret = max77693_muic_set_path(info, MAX77693_CONTROL1_SW_AUDIO,
- attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, EXTCON_USB, attached);
- break;
- case MAX77693_MUIC_GND_MHL:
- case MAX77693_MUIC_GND_MHL_VB:
- /* MHL or MHL with USB/TA cable */
- extcon_set_cable_state_(info->edev, EXTCON_DISP_MHL, attached);
- break;
- default:
- dev_err(info->dev, "failed to detect %s cable of gnd type\n",
- attached ? "attached" : "detached");
- return -EINVAL;
- }
- return 0;
- }
- static int max77693_muic_jig_handler(struct max77693_muic_info *info,
- int cable_type, bool attached)
- {
- int ret = 0;
- u8 path = MAX77693_CONTROL1_SW_OPEN;
- dev_info(info->dev,
- "external connector is %s (adc:0x%02x)\n",
- attached ? "attached" : "detached", cable_type);
- switch (cable_type) {
- case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF: /* ADC_JIG_USB_OFF */
- case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
- /* PATH:AP_USB */
- path = MAX77693_CONTROL1_SW_USB;
- break;
- case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
- case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
- /* PATH:AP_UART */
- path = MAX77693_CONTROL1_SW_UART;
- break;
- default:
- dev_err(info->dev, "failed to detect %s jig cable\n",
- attached ? "attached" : "detached");
- return -EINVAL;
- }
- ret = max77693_muic_set_path(info, path, attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, EXTCON_JIG, attached);
- return 0;
- }
- static int max77693_muic_adc_handler(struct max77693_muic_info *info)
- {
- int cable_type;
- int button_type;
- bool attached;
- int ret = 0;
- /* Check accessory state which is either detached or attached */
- cable_type = max77693_muic_get_cable_type(info,
- MAX77693_CABLE_GROUP_ADC, &attached);
- dev_info(info->dev,
- "external connector is %s (adc:0x%02x, prev_adc:0x%x)\n",
- attached ? "attached" : "detached", cable_type,
- info->prev_cable_type);
- switch (cable_type) {
- case MAX77693_MUIC_ADC_GROUND:
- /* USB_HOST/MHL/Audio */
- max77693_muic_adc_ground_handler(info);
- break;
- case MAX77693_MUIC_ADC_FACTORY_MODE_USB_OFF:
- case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON:
- case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF:
- case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON:
- /* JIG */
- ret = max77693_muic_jig_handler(info, cable_type, attached);
- if (ret < 0)
- return ret;
- break;
- case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
- case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
- case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
- /*
- * DOCK device
- *
- * The MAX77693 MUIC device can detect total 34 cable type
- * except of charger cable and MUIC device didn't define
- * specfic role of cable in the range of from 0x01 to 0x12
- * of ADC value. So, can use/define cable with no role according
- * to schema of hardware board.
- */
- ret = max77693_muic_dock_handler(info, cable_type, attached);
- if (ret < 0)
- return ret;
- break;
- case MAX77693_MUIC_ADC_REMOTE_S3_BUTTON: /* DOCK_KEY_PREV */
- case MAX77693_MUIC_ADC_REMOTE_S7_BUTTON: /* DOCK_KEY_NEXT */
- case MAX77693_MUIC_ADC_REMOTE_S9_BUTTON: /* DOCK_VOL_DOWN */
- case MAX77693_MUIC_ADC_REMOTE_S10_BUTTON: /* DOCK_VOL_UP */
- case MAX77693_MUIC_ADC_REMOTE_S12_BUTTON: /* DOCK_KEY_PLAY_PAUSE */
- /*
- * Button of DOCK device
- * - the Prev/Next/Volume Up/Volume Down/Play-Pause button
- *
- * The MAX77693 MUIC device can detect total 34 cable type
- * except of charger cable and MUIC device didn't define
- * specfic role of cable in the range of from 0x01 to 0x12
- * of ADC value. So, can use/define cable with no role according
- * to schema of hardware board.
- */
- if (attached)
- button_type = info->prev_button_type = cable_type;
- else
- button_type = info->prev_button_type;
- ret = max77693_muic_dock_button_handler(info, button_type,
- attached);
- if (ret < 0)
- return ret;
- break;
- case MAX77693_MUIC_ADC_SEND_END_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S1_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S2_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S4_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S5_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S6_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S8_BUTTON:
- case MAX77693_MUIC_ADC_REMOTE_S11_BUTTON:
- case MAX77693_MUIC_ADC_RESERVED_ACC_1:
- case MAX77693_MUIC_ADC_RESERVED_ACC_2:
- case MAX77693_MUIC_ADC_RESERVED_ACC_4:
- case MAX77693_MUIC_ADC_RESERVED_ACC_5:
- case MAX77693_MUIC_ADC_CEA936_AUDIO:
- case MAX77693_MUIC_ADC_PHONE_POWERED_DEV:
- case MAX77693_MUIC_ADC_TTY_CONVERTER:
- case MAX77693_MUIC_ADC_UART_CABLE:
- case MAX77693_MUIC_ADC_CEA936A_TYPE1_CHG:
- case MAX77693_MUIC_ADC_CEA936A_TYPE2_CHG:
- /*
- * This accessory isn't used in general case if it is specially
- * needed to detect additional accessory, should implement
- * proper operation when this accessory is attached/detached.
- */
- dev_info(info->dev,
- "accessory is %s but it isn't used (adc:0x%x)\n",
- attached ? "attached" : "detached", cable_type);
- return -EAGAIN;
- default:
- dev_err(info->dev,
- "failed to detect %s accessory (adc:0x%x)\n",
- attached ? "attached" : "detached", cable_type);
- return -EINVAL;
- }
- return 0;
- }
- static int max77693_muic_chg_handler(struct max77693_muic_info *info)
- {
- int chg_type;
- int cable_type_gnd;
- int cable_type;
- bool attached;
- bool cable_attached;
- int ret = 0;
- chg_type = max77693_muic_get_cable_type(info,
- MAX77693_CABLE_GROUP_CHG, &attached);
- dev_info(info->dev,
- "external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n",
- attached ? "attached" : "detached",
- chg_type, info->prev_chg_type);
- switch (chg_type) {
- case MAX77693_CHARGER_TYPE_USB:
- case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
- case MAX77693_CHARGER_TYPE_NONE:
- /* Check MAX77693_CABLE_GROUP_ADC_GND type */
- cable_type_gnd = max77693_muic_get_cable_type(info,
- MAX77693_CABLE_GROUP_ADC_GND,
- &cable_attached);
- switch (cable_type_gnd) {
- case MAX77693_MUIC_GND_MHL:
- case MAX77693_MUIC_GND_MHL_VB:
- /*
- * MHL cable with USB/TA cable
- * - MHL cable include two port(HDMI line and separate
- * micro-usb port. When the target connect MHL cable,
- * extcon driver check whether USB/TA cable is
- * connected. If USB/TA cable is connected, extcon
- * driver notify state to notifiee for charging battery.
- *
- * Features of 'USB/TA with MHL cable'
- * - Support MHL
- * - Support charging through micro-usb port without
- * data connection
- */
- extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
- attached);
- if (!cable_attached)
- extcon_set_cable_state_(info->edev,
- EXTCON_DISP_MHL, cable_attached);
- break;
- }
- /* Check MAX77693_CABLE_GROUP_ADC type */
- cable_type = max77693_muic_get_cable_type(info,
- MAX77693_CABLE_GROUP_ADC,
- &cable_attached);
- switch (cable_type) {
- case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
- /*
- * Dock-Audio device with USB/TA cable
- * - Dock device include two port(Dock-Audio and micro-
- * usb port). When the target connect Dock-Audio device,
- * extcon driver check whether USB/TA cable is connected
- * or not. If USB/TA cable is connected, extcon driver
- * notify state to notifiee for charging battery.
- *
- * Features of 'USB/TA cable with Dock-Audio device'
- * - Support external output feature of audio.
- * - Support charging through micro-usb port without
- * data connection.
- */
- extcon_set_cable_state_(info->edev, EXTCON_USB,
- attached);
- if (!cable_attached)
- extcon_set_cable_state_(info->edev, EXTCON_DOCK,
- cable_attached);
- break;
- case MAX77693_MUIC_ADC_RESERVED_ACC_3: /* Dock-Smart */
- /*
- * Dock-Smart device with USB/TA cable
- * - Dock-Desk device include three type of cable which
- * are HDMI, USB for mouse/keyboard and micro-usb port
- * for USB/TA cable. Dock-Smart device need always
- * exteranl power supply(USB/TA cable through micro-usb
- * cable). Dock-Smart device support screen output of
- * target to separate monitor and mouse/keyboard for
- * desktop mode.
- *
- * Features of 'USB/TA cable with Dock-Smart device'
- * - Support MHL
- * - Support external output feature of audio
- * - Support charging through micro-usb port without
- * data connection if TA cable is connected to target.
- * - Support charging and data connection through micro-
- * usb port if USB cable is connected between target
- * and host device
- * - Support OTG(On-The-Go) device (Ex: Mouse/Keyboard)
- */
- ret = max77693_muic_set_path(info, info->path_usb,
- attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, EXTCON_DOCK,
- attached);
- extcon_set_cable_state_(info->edev, EXTCON_DISP_MHL,
- attached);
- break;
- }
- /* Check MAX77693_CABLE_GROUP_CHG type */
- switch (chg_type) {
- case MAX77693_CHARGER_TYPE_NONE:
- /*
- * When MHL(with USB/TA cable) or Dock-Audio with USB/TA
- * cable is attached, muic device happen below two irq.
- * - 'MAX77693_MUIC_IRQ_INT1_ADC' for detecting
- * MHL/Dock-Audio.
- * - 'MAX77693_MUIC_IRQ_INT2_CHGTYP' for detecting
- * USB/TA cable connected to MHL or Dock-Audio.
- * Always, happen eariler MAX77693_MUIC_IRQ_INT1_ADC
- * irq than MAX77693_MUIC_IRQ_INT2_CHGTYP irq.
- *
- * If user attach MHL (with USB/TA cable and immediately
- * detach MHL with USB/TA cable before MAX77693_MUIC_IRQ
- * _INT2_CHGTYP irq is happened, USB/TA cable remain
- * connected state to target. But USB/TA cable isn't
- * connected to target. The user be face with unusual
- * action. So, driver should check this situation in
- * spite of, that previous charger type is N/A.
- */
- break;
- case MAX77693_CHARGER_TYPE_USB:
- /* Only USB cable, PATH:AP_USB */
- ret = max77693_muic_set_path(info, info->path_usb,
- attached);
- if (ret < 0)
- return ret;
- extcon_set_cable_state_(info->edev, EXTCON_USB,
- attached);
- break;
- case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
- /* Only TA cable */
- extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_DCP,
- attached);
- break;
- }
- break;
- case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
- extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_CDP,
- attached);
- break;
- case MAX77693_CHARGER_TYPE_APPLE_500MA:
- extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_SLOW,
- attached);
- break;
- case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
- extcon_set_cable_state_(info->edev, EXTCON_CHG_USB_FAST,
- attached);
- break;
- case MAX77693_CHARGER_TYPE_DEAD_BATTERY:
- break;
- default:
- dev_err(info->dev,
- "failed to detect %s accessory (chg_type:0x%x)\n",
- attached ? "attached" : "detached", chg_type);
- return -EINVAL;
- }
- return 0;
- }
- static void max77693_muic_irq_work(struct work_struct *work)
- {
- struct max77693_muic_info *info = container_of(work,
- struct max77693_muic_info, irq_work);
- int irq_type = -1;
- int i, ret = 0;
- if (!info->edev)
- return;
- mutex_lock(&info->mutex);
- for (i = 0; i < ARRAY_SIZE(muic_irqs); i++)
- if (info->irq == muic_irqs[i].virq)
- irq_type = muic_irqs[i].irq;
- ret = regmap_bulk_read(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_STATUS1, info->status, 2);
- if (ret) {
- dev_err(info->dev, "failed to read MUIC register\n");
- mutex_unlock(&info->mutex);
- return;
- }
- switch (irq_type) {
- case MAX77693_MUIC_IRQ_INT1_ADC:
- case MAX77693_MUIC_IRQ_INT1_ADC_LOW:
- case MAX77693_MUIC_IRQ_INT1_ADC_ERR:
- case MAX77693_MUIC_IRQ_INT1_ADC1K:
- /* Handle all of accessory except for
- type of charger accessory */
- ret = max77693_muic_adc_handler(info);
- break;
- case MAX77693_MUIC_IRQ_INT2_CHGTYP:
- case MAX77693_MUIC_IRQ_INT2_CHGDETREUN:
- case MAX77693_MUIC_IRQ_INT2_DCDTMR:
- case MAX77693_MUIC_IRQ_INT2_DXOVP:
- case MAX77693_MUIC_IRQ_INT2_VBVOLT:
- case MAX77693_MUIC_IRQ_INT2_VIDRM:
- /* Handle charger accessory */
- ret = max77693_muic_chg_handler(info);
- break;
- case MAX77693_MUIC_IRQ_INT3_EOC:
- case MAX77693_MUIC_IRQ_INT3_CGMBC:
- case MAX77693_MUIC_IRQ_INT3_OVP:
- case MAX77693_MUIC_IRQ_INT3_MBCCHG_ERR:
- case MAX77693_MUIC_IRQ_INT3_CHG_ENABLED:
- case MAX77693_MUIC_IRQ_INT3_BAT_DET:
- break;
- default:
- dev_err(info->dev, "muic interrupt: irq %d occurred\n",
- irq_type);
- mutex_unlock(&info->mutex);
- return;
- }
- if (ret < 0)
- dev_err(info->dev, "failed to handle MUIC interrupt\n");
- mutex_unlock(&info->mutex);
- }
- static irqreturn_t max77693_muic_irq_handler(int irq, void *data)
- {
- struct max77693_muic_info *info = data;
- info->irq = irq;
- schedule_work(&info->irq_work);
- return IRQ_HANDLED;
- }
- static const struct regmap_config max77693_muic_regmap_config = {
- .reg_bits = 8,
- .val_bits = 8,
- };
- static int max77693_muic_detect_accessory(struct max77693_muic_info *info)
- {
- int ret = 0;
- int adc;
- int chg_type;
- bool attached;
- mutex_lock(&info->mutex);
- /* Read STATUSx register to detect accessory */
- ret = regmap_bulk_read(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_STATUS1, info->status, 2);
- if (ret) {
- dev_err(info->dev, "failed to read MUIC register\n");
- mutex_unlock(&info->mutex);
- return ret;
- }
- adc = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_ADC,
- &attached);
- if (attached && adc != MAX77693_MUIC_ADC_OPEN) {
- ret = max77693_muic_adc_handler(info);
- if (ret < 0) {
- dev_err(info->dev, "Cannot detect accessory\n");
- mutex_unlock(&info->mutex);
- return ret;
- }
- }
- chg_type = max77693_muic_get_cable_type(info, MAX77693_CABLE_GROUP_CHG,
- &attached);
- if (attached && chg_type != MAX77693_CHARGER_TYPE_NONE) {
- ret = max77693_muic_chg_handler(info);
- if (ret < 0) {
- dev_err(info->dev, "Cannot detect charger accessory\n");
- mutex_unlock(&info->mutex);
- return ret;
- }
- }
- mutex_unlock(&info->mutex);
- return 0;
- }
- static void max77693_muic_detect_cable_wq(struct work_struct *work)
- {
- struct max77693_muic_info *info = container_of(to_delayed_work(work),
- struct max77693_muic_info, wq_detcable);
- max77693_muic_detect_accessory(info);
- }
- static int max77693_muic_probe(struct platform_device *pdev)
- {
- struct max77693_dev *max77693 = dev_get_drvdata(pdev->dev.parent);
- struct max77693_platform_data *pdata = dev_get_platdata(max77693->dev);
- struct max77693_muic_info *info;
- struct max77693_reg_data *init_data;
- int num_init_data;
- int delay_jiffies;
- int ret;
- int i;
- unsigned int id;
- info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info),
- GFP_KERNEL);
- if (!info)
- return -ENOMEM;
- info->dev = &pdev->dev;
- info->max77693 = max77693;
- if (info->max77693->regmap_muic) {
- dev_dbg(&pdev->dev, "allocate register map\n");
- } else {
- info->max77693->regmap_muic = devm_regmap_init_i2c(
- info->max77693->i2c_muic,
- &max77693_muic_regmap_config);
- if (IS_ERR(info->max77693->regmap_muic)) {
- ret = PTR_ERR(info->max77693->regmap_muic);
- dev_err(max77693->dev,
- "failed to allocate register map: %d\n", ret);
- return ret;
- }
- }
- /* Register input device for button of dock device */
- info->dock = devm_input_allocate_device(&pdev->dev);
- if (!info->dock) {
- dev_err(&pdev->dev, "%s: failed to allocate input\n", __func__);
- return -ENOMEM;
- }
- info->dock->name = "max77693-muic/dock";
- info->dock->phys = "max77693-muic/extcon";
- info->dock->dev.parent = &pdev->dev;
- __set_bit(EV_REP, info->dock->evbit);
- input_set_capability(info->dock, EV_KEY, KEY_VOLUMEUP);
- input_set_capability(info->dock, EV_KEY, KEY_VOLUMEDOWN);
- input_set_capability(info->dock, EV_KEY, KEY_PLAYPAUSE);
- input_set_capability(info->dock, EV_KEY, KEY_PREVIOUSSONG);
- input_set_capability(info->dock, EV_KEY, KEY_NEXTSONG);
- ret = input_register_device(info->dock);
- if (ret < 0) {
- dev_err(&pdev->dev, "Cannot register input device error(%d)\n",
- ret);
- return ret;
- }
- platform_set_drvdata(pdev, info);
- mutex_init(&info->mutex);
- INIT_WORK(&info->irq_work, max77693_muic_irq_work);
- /* Support irq domain for MAX77693 MUIC device */
- for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) {
- struct max77693_muic_irq *muic_irq = &muic_irqs[i];
- unsigned int virq = 0;
- virq = regmap_irq_get_virq(max77693->irq_data_muic,
- muic_irq->irq);
- if (!virq)
- return -EINVAL;
- muic_irq->virq = virq;
- ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
- max77693_muic_irq_handler,
- IRQF_NO_SUSPEND,
- muic_irq->name, info);
- if (ret) {
- dev_err(&pdev->dev,
- "failed: irq request (IRQ: %d, error :%d)\n",
- muic_irq->irq, ret);
- return ret;
- }
- }
- /* Initialize extcon device */
- info->edev = devm_extcon_dev_allocate(&pdev->dev,
- max77693_extcon_cable);
- if (IS_ERR(info->edev)) {
- dev_err(&pdev->dev, "failed to allocate memory for extcon\n");
- return -ENOMEM;
- }
- ret = devm_extcon_dev_register(&pdev->dev, info->edev);
- if (ret) {
- dev_err(&pdev->dev, "failed to register extcon device\n");
- return ret;
- }
- /* Initialize MUIC register by using platform data or default data */
- if (pdata && pdata->muic_data) {
- init_data = pdata->muic_data->init_data;
- num_init_data = pdata->muic_data->num_init_data;
- } else {
- init_data = default_init_data;
- num_init_data = ARRAY_SIZE(default_init_data);
- }
- for (i = 0; i < num_init_data; i++) {
- regmap_write(info->max77693->regmap_muic,
- init_data[i].addr,
- init_data[i].data);
- }
- if (pdata && pdata->muic_data) {
- struct max77693_muic_platform_data *muic_pdata
- = pdata->muic_data;
- /*
- * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB
- * h/w path of COMP2/COMN1 on CONTROL1 register.
- */
- if (muic_pdata->path_uart)
- info->path_uart = muic_pdata->path_uart;
- else
- info->path_uart = MAX77693_CONTROL1_SW_UART;
- if (muic_pdata->path_usb)
- info->path_usb = muic_pdata->path_usb;
- else
- info->path_usb = MAX77693_CONTROL1_SW_USB;
- /*
- * Default delay time for detecting cable state
- * after certain time.
- */
- if (muic_pdata->detcable_delay_ms)
- delay_jiffies =
- msecs_to_jiffies(muic_pdata->detcable_delay_ms);
- else
- delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
- } else {
- info->path_usb = MAX77693_CONTROL1_SW_USB;
- info->path_uart = MAX77693_CONTROL1_SW_UART;
- delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT);
- }
- /* Set initial path for UART */
- max77693_muic_set_path(info, info->path_uart, true);
- /* Check revision number of MUIC device*/
- ret = regmap_read(info->max77693->regmap_muic,
- MAX77693_MUIC_REG_ID, &id);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to read revision number\n");
- return ret;
- }
- dev_info(info->dev, "device ID : 0x%x\n", id);
- /* Set ADC debounce time */
- max77693_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS);
- /*
- * Detect accessory after completing the initialization of platform
- *
- * - Use delayed workqueue to detect cable state and then
- * notify cable state to notifiee/platform through uevent.
- * After completing the booting of platform, the extcon provider
- * driver should notify cable state to upper layer.
- */
- INIT_DELAYED_WORK(&info->wq_detcable, max77693_muic_detect_cable_wq);
- queue_delayed_work(system_power_efficient_wq, &info->wq_detcable,
- delay_jiffies);
- return ret;
- }
- static int max77693_muic_remove(struct platform_device *pdev)
- {
- struct max77693_muic_info *info = platform_get_drvdata(pdev);
- cancel_work_sync(&info->irq_work);
- input_unregister_device(info->dock);
- return 0;
- }
- static struct platform_driver max77693_muic_driver = {
- .driver = {
- .name = DEV_NAME,
- },
- .probe = max77693_muic_probe,
- .remove = max77693_muic_remove,
- };
- module_platform_driver(max77693_muic_driver);
- MODULE_DESCRIPTION("Maxim MAX77693 Extcon driver");
- MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:extcon-max77693");
|