/* * extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC * * Copyright (C) 2012 Samsung Electrnoics * Chanwoo Choi * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #define DEV_NAME "max77693-muic" #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ 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 */ MAX77693_MUIC_GND_USB_OTG = 0x100, /* ADC:0x0, VBVolot:0, ADCLow:0, ADC1K:0 */ MAX77693_MUIC_GND_USB_OTG_VB = 0x104, /* ADC:0x0, VBVolot:1, ADCLow:0, ADC1K:0 */ MAX77693_MUIC_GND_AV_CABLE_LOAD = 0x102,/* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:0 */ MAX77693_MUIC_GND_MHL = 0x103, /* ADC:0x0, VBVolot:0, ADCLow:1, ADC1K:1 */ MAX77693_MUIC_GND_MHL_VB = 0x107, /* ADC:0x0, VBVolot:1, ADCLow:1, ADC1K: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, }; 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"); break; default: dev_err(info->dev, "invalid ADC debounce time\n"); ret = -EINVAL; break; } return ret; }; /* * 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"); goto out; } 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"); goto out; } dev_info(info->dev, "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", ctrl1, ctrl2, attached ? "attached" : "detached"); out: return ret; } /* * 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 connector * [0x1 1 1 1 ] : MHL with charging connector */ 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; } /* 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; int ret = 0; 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); ret = -EINVAL; goto out; } input_event(dock, EV_KEY, code, attached); input_sync(dock); out: 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) goto out; 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) goto out; 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 accessory\n", attached ? "attached" : "detached"); ret = -EINVAL; break; } out: return ret; } 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; } ret = max77693_muic_set_path(info, path, attached); if (ret < 0) goto out; extcon_set_cable_state(info->edev, cable_name, attached); out: return ret; } 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) goto out; 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) goto out; 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) goto out; 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); goto out; default: dev_err(info->dev, "failed to detect %s accessory (adc:0x%x)\n", attached ? "attached" : "detached", cable_type); ret = -EINVAL; goto out; } out: return ret; } 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. 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 interrupt. * - '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 interrupt * than MAX77693_MUIC_IRQ_INT2_CHGTYP interrupt. * * If user attach MHL (with USB/TA cable and immediately detach * MHL with USB/TA cable before MAX77693_MUIC_IRQ_INT2_CHGTYP * interrupt 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); break; } 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 -EINVAL; } 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"); } 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; } 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_platform_data *muic_pdata = pdata->muic_data; struct max77693_muic_info *info; 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_kzalloc(&pdev->dev, sizeof(struct extcon_dev), GFP_KERNEL); if (!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->supported_cable = max77693_extcon_cable; ret = extcon_dev_register(info->edev, NULL); if (ret) { dev_err(&pdev->dev, "failed to register extcon device\n"); goto err_irq; } /* Initialize MUIC register by using platform data */ for (i = 0 ; i < muic_pdata->num_init_data ; i++) { enum max77693_irq_source irq_src = MAX77693_IRQ_GROUP_NR; max77693_write_reg(info->max77693->regmap_muic, muic_pdata->init_data[i].addr, muic_pdata->init_data[i].data); switch (muic_pdata->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] = muic_pdata->init_data[i].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; /* 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_extcon; } 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); 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); schedule_delayed_work(&info->wq_detcable, delay_jiffies); return ret; err_extcon: extcon_dev_unregister(info->edev); 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); extcon_dev_unregister(info->edev); 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 "); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:extcon-max77693");