--- /dev/null
+/*
+ * 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-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 = 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)
+ */
+enum {
+ EXTCON_CABLE_USB = 0,
+ EXTCON_CABLE_USB_HOST,
+ EXTCON_CABLE_TA,
+ EXTCON_CABLE_FAST_CHARGER,
+ EXTCON_CABLE_SLOW_CHARGER,
+ EXTCON_CABLE_CHARGE_DOWNSTREAM,
+ EXTCON_CABLE_MHL,
+ EXTCON_CABLE_MHL_TA,
+ EXTCON_CABLE_JIG_USB_ON,
+ EXTCON_CABLE_JIG_USB_OFF,
+ EXTCON_CABLE_JIG_UART_OFF,
+ EXTCON_CABLE_JIG_UART_ON,
+ EXTCON_CABLE_DOCK_SMART,
+ EXTCON_CABLE_DOCK_DESK,
+ EXTCON_CABLE_DOCK_AUDIO,
+
+ _EXTCON_CABLE_NUM,
+};
+
+static const char *max77693_extcon_cable[] = {
+ [EXTCON_CABLE_USB] = "USB",
+ [EXTCON_CABLE_USB_HOST] = "USB-Host",
+ [EXTCON_CABLE_TA] = "TA",
+ [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger",
+ [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger",
+ [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream",
+ [EXTCON_CABLE_MHL] = "MHL",
+ [EXTCON_CABLE_MHL_TA] = "MHL-TA",
+ [EXTCON_CABLE_JIG_USB_ON] = "JIG-USB-ON",
+ [EXTCON_CABLE_JIG_USB_OFF] = "JIG-USB-OFF",
+ [EXTCON_CABLE_JIG_UART_OFF] = "JIG-UART-OFF",
+ [EXTCON_CABLE_JIG_UART_ON] = "JIG-UART-ON",
+ [EXTCON_CABLE_DOCK_SMART] = "Dock-Smart",
+ [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk",
+ [EXTCON_CABLE_DOCK_AUDIO] = "Dock-Audio",
+
+ NULL,
+};
+
+/*
+ * 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 << 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 = 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 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */
+ else
+ ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */
+
+ ret = regmap_update_bits(info->max77693->regmap_muic,
+ MAX77693_MUIC_REG_CTRL2,
+ CONTROL2_LOWPWR_MASK | 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] & STATUS1_ADC_MASK;
+ adc >>= 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] & STATUS1_ADC_MASK;
+ adc >>= 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] & STATUS1_ADCLOW_MASK;
+ adclow >>= STATUS1_ADCLOW_SHIFT;
+ adc1k = info->status[0] & STATUS1_ADC1K_MASK;
+ adc1k >>= STATUS1_ADC1K_SHIFT;
+
+ vbvolt = info->status[1] & STATUS2_VBVOLT_MASK;
+ vbvolt >>= 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] & STATUS2_CHGTYP_MASK;
+ chg_type >>= 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] & STATUS1_ADC_MASK;
+ adc >>= STATUS1_ADC_SHIFT;
+ chg_type = info->status[1] & STATUS2_CHGTYP_MASK;
+ chg_type >>= 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] & STATUS2_VBVOLT_MASK;
+ vbvolt >>= 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;
+ char dock_name[CABLE_NAME_MAX];
+
+ 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-Smart/MHL state.
+ * - Dock-Smart 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, "Dock-Smart", attached);
+ extcon_set_cable_state(info->edev, "MHL", attached);
+ goto out;
+ case MAX77693_MUIC_ADC_AUDIO_MODE_REMOTE: /* Dock-Desk */
+ strcpy(dock_name, "Dock-Desk");
+ break;
+ case MAX77693_MUIC_ADC_AV_CABLE_NOLOAD: /* Dock-Audio */
+ strcpy(dock_name, "Dock-Audio");
+ if (!attached)
+ extcon_set_cable_state(info->edev, "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, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev, dock_name, 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, CONTROL1_SW_USB, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev, "USB-Host", attached);
+ break;
+ case MAX77693_MUIC_GND_AV_CABLE_LOAD:
+ /* Audio Video Cable with load, PATH:AUDIO */
+ ret = max77693_muic_set_path(info, CONTROL1_SW_AUDIO, attached);
+ if (ret < 0)
+ return ret;
+ extcon_set_cable_state(info->edev,
+ "Audio-video-load", 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, "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)
+{
+ char cable_name[32];
+ int ret = 0;
+ u8 path = 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 */
+ /* PATH:AP_USB */
+ strcpy(cable_name, "JIG-USB-OFF");
+ path = CONTROL1_SW_USB;
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_USB_ON: /* ADC_JIG_USB_ON */
+ /* PATH:AP_USB */
+ strcpy(cable_name, "JIG-USB-ON");
+ path = CONTROL1_SW_USB;
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_OFF: /* ADC_JIG_UART_OFF */
+ /* PATH:AP_UART */
+ strcpy(cable_name, "JIG-UART-OFF");
+ path = CONTROL1_SW_UART;
+ break;
+ case MAX77693_MUIC_ADC_FACTORY_MODE_UART_ON: /* ADC_JIG_UART_ON */
+ /* PATH:AP_UART */
+ strcpy(cable_name, "JIG-UART-ON");
+ path = 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, cable_name, 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 MHL-TA(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 MHL-TA(USB/TA) cable is
+ * connected. If MHL-TA cable is connected, extcon
+ * driver notify state to notifiee for charging battery.
+ *
+ * Features of 'MHL-TA(USB/TA) with MHL cable'
+ * - Support MHL
+ * - Support charging through micro-usb port without
+ * data connection
+ */
+ extcon_set_cable_state(info->edev, "MHL-TA", attached);
+ if (!cable_attached)
+ extcon_set_cable_state(info->edev,
+ "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, "USB", attached);
+
+ if (!cable_attached)
+ extcon_set_cable_state(info->edev, "Dock-Audio",
+ 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, "Dock-Smart",
+ attached);
+ extcon_set_cable_state(info->edev, "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, "USB", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_DEDICATED_CHG:
+ /* Only TA cable */
+ extcon_set_cable_state(info->edev, "TA", attached);
+ break;
+ }
+ break;
+ case MAX77693_CHARGER_TYPE_DOWNSTREAM_PORT:
+ extcon_set_cable_state(info->edev,
+ "Charge-downstream", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_500MA:
+ extcon_set_cable_state(info->edev, "Slow-charger", attached);
+ break;
+ case MAX77693_CHARGER_TYPE_APPLE_1A_2A:
+ extcon_set_cable_state(info->edev, "Fast-charger", 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->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;
+ }
+ info->edev->name = DEV_NAME;
+
+ 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++) {
+ enum max77693_irq_source irq_src
+ = MAX77693_IRQ_GROUP_NR;
+
+ regmap_write(info->max77693->regmap_muic,
+ init_data[i].addr,
+ init_data[i].data);
+
+ switch (init_data[i].addr) {
+ case MAX77693_MUIC_REG_INTMASK1:
+ irq_src = MUIC_INT1;
+ break;
+ case MAX77693_MUIC_REG_INTMASK2:
+ irq_src = MUIC_INT2;
+ break;
+ case MAX77693_MUIC_REG_INTMASK3:
+ irq_src = MUIC_INT3;
+ break;
+ }
+
+ if (irq_src < MAX77693_IRQ_GROUP_NR)
+ info->max77693->irq_masks_cur[irq_src]
+ = 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 = CONTROL1_SW_UART;
+
+ if (muic_pdata->path_usb)
+ info->path_usb = muic_pdata->path_usb;
+ else
+ info->path_usb = 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 = CONTROL1_SW_USB;
+ info->path_uart = 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");
Code Review / kvmfornfv.git / blobdiff