diff options
Diffstat (limited to 'drivers/extcon/extcon-max77693.c')
| -rw-r--r-- | drivers/extcon/extcon-max77693.c | 1323 |
1 files changed, 1323 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-max77693.c b/drivers/extcon/extcon-max77693.c new file mode 100644 index 00000000000..2c7c3e19159 --- /dev/null +++ b/drivers/extcon/extcon-max77693.c @@ -0,0 +1,1323 @@ +/* + * 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_OTG = 0x100, /* 0x0| 0| 0| 0| */ + MAX77693_MUIC_GND_USB_OTG_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] = "Dock-Car", + [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: + ret = max77693_update_reg(info->max77693->regmap_muic, + MAX77693_MUIC_REG_CTRL3, + time << CONTROL3_ADCDBSET_SHIFT, + CONTROL3_ADCDBSET_MASK); + 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; + u8 ctrl1, ctrl2 = 0; + + if (attached) + ctrl1 = val; + else + ctrl1 = CONTROL1_SW_OPEN; + + ret = max77693_update_reg(info->max77693->regmap_muic, + MAX77693_MUIC_REG_CTRL1, ctrl1, COMP_SW_MASK); + 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 = max77693_update_reg(info->max77693->regmap_muic, + MAX77693_MUIC_REG_CTRL2, ctrl2, + CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); + 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_OTG + * [0x1| 1| 0| 0] USB_OTG_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 device (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_FACTORY_MODE_UART_ON: /* Dock-Car */ + strcpy(dock_name, "Dock-Car"); + break; + 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_OTG: + case MAX77693_MUIC_GND_USB_OTG_VB: + /* USB_OTG, 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; + 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_OTG/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: + /* 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_FACTORY_MODE_UART_ON: /* Dock-Car */ + 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 device (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 = max77693_bulk_read(info->max77693->regmap_muic, + MAX77693_MUIC_REG_STATUS1, 2, info->status); + 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); + + return; +} + +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 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 = max77693_bulk_read(info->max77693->regmap_muic, + MAX77693_MUIC_REG_STATUS1, 2, info->status); + 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; + u8 id; + + info = devm_kzalloc(&pdev->dev, sizeof(struct max77693_muic_info), + GFP_KERNEL); + if (!info) { + dev_err(&pdev->dev, "failed to allocate memory\n"); + 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 = irq_create_mapping(max77693->irq_domain, muic_irq->irq); + if (!virq) { + ret = -EINVAL; + goto err_irq; + } + muic_irq->virq = virq; + + ret = request_threaded_irq(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); + goto err_irq; + } + } + + /* 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"); + ret = -ENOMEM; + goto err_irq; + } + info->edev->name = DEV_NAME; + info->edev->dev.parent = &pdev->dev; + + ret = devm_extcon_dev_register(&pdev->dev, info->edev); + if (ret) { + dev_err(&pdev->dev, "failed to register extcon device\n"); + goto err_irq; + } + + /* 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; + + max77693_write_reg(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 = max77693_read_reg(info->max77693->regmap_muic, + MAX77693_MUIC_REG_ID, &id); + if (ret < 0) { + dev_err(&pdev->dev, "failed to read revision number\n"); + goto err_irq; + } + 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; + +err_irq: + while (--i >= 0) + free_irq(muic_irqs[i].virq, info); + return ret; +} + +static int max77693_muic_remove(struct platform_device *pdev) +{ + struct max77693_muic_info *info = platform_get_drvdata(pdev); + int i; + + for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) + free_irq(muic_irqs[i].virq, info); + cancel_work_sync(&info->irq_work); + input_unregister_device(info->dock); + + return 0; +} + +static struct platform_driver max77693_muic_driver = { + .driver = { + .name = DEV_NAME, + .owner = THIS_MODULE, + }, + .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"); |