// SPDX-License-Identifier: GPL-2.0+//// extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC//// Copyright (C) 2012 Samsung Electronics// Donggeun Kim <dg77.kim@samsung.com> #include <linux/devm-helpers.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/i2c.h>#include <linux/slab.h>#include <linux/interrupt.h>#include <linux/err.h>#include <linux/platform_device.h>#include <linux/kobject.h>#include <linux/mfd/max8997.h>#include <linux/mfd/max8997-private.h>#include <linux/extcon-provider.h>#include <linux/irqdomain.h> #define DEV_NAME "max8997-muic"#define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ enum max8997_muic_adc_debounce_time { ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */ ADC_DEBOUNCE_TIME_10MS, /* 10ms */ ADC_DEBOUNCE_TIME_25MS, /* 25ms */ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */}; struct max8997_muic_irq { unsigned int irq; const char *name; unsigned int virq;}; static struct max8997_muic_irq muic_irqs[] = { { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" }, { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" }, { MAX8997_MUICIRQ_ADC, "muic-ADC" }, { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" }, { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" }, { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" }, { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" }, { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" }, { MAX8997_MUICIRQ_OVP, "muic-OVP" }, { MAX8997_PMICIRQ_CHGINS, "pmic-CHGINS" }, { MAX8997_PMICIRQ_CHGRM, "pmic-CHGRM" },}; /* Define supported cable type */enum max8997_muic_acc_type { MAX8997_MUIC_ADC_GROUND = 0x0, MAX8997_MUIC_ADC_MHL, /* MHL*/ MAX8997_MUIC_ADC_REMOTE_S1_BUTTON, MAX8997_MUIC_ADC_REMOTE_S2_BUTTON, MAX8997_MUIC_ADC_REMOTE_S3_BUTTON, MAX8997_MUIC_ADC_REMOTE_S4_BUTTON, MAX8997_MUIC_ADC_REMOTE_S5_BUTTON, MAX8997_MUIC_ADC_REMOTE_S6_BUTTON, MAX8997_MUIC_ADC_REMOTE_S7_BUTTON, MAX8997_MUIC_ADC_REMOTE_S8_BUTTON, MAX8997_MUIC_ADC_REMOTE_S9_BUTTON, MAX8997_MUIC_ADC_REMOTE_S10_BUTTON, MAX8997_MUIC_ADC_REMOTE_S11_BUTTON, MAX8997_MUIC_ADC_REMOTE_S12_BUTTON, MAX8997_MUIC_ADC_RESERVED_ACC_1, MAX8997_MUIC_ADC_RESERVED_ACC_2, MAX8997_MUIC_ADC_RESERVED_ACC_3, MAX8997_MUIC_ADC_RESERVED_ACC_4, MAX8997_MUIC_ADC_RESERVED_ACC_5, MAX8997_MUIC_ADC_CEA936_AUDIO, MAX8997_MUIC_ADC_PHONE_POWERED_DEV, MAX8997_MUIC_ADC_TTY_CONVERTER, MAX8997_MUIC_ADC_UART_CABLE, MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG, MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */ MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */ MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */ MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG, MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */ MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */ MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE, MAX8997_MUIC_ADC_OPEN, /* OPEN */}; enum max8997_muic_cable_group { MAX8997_CABLE_GROUP_ADC = 0, MAX8997_CABLE_GROUP_ADC_GND, MAX8997_CABLE_GROUP_CHG, MAX8997_CABLE_GROUP_VBVOLT,}; enum max8997_muic_usb_type { MAX8997_USB_HOST, MAX8997_USB_DEVICE,}; enum max8997_muic_charger_type { MAX8997_CHARGER_TYPE_NONE = 0, MAX8997_CHARGER_TYPE_USB, MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT, MAX8997_CHARGER_TYPE_DEDICATED_CHG, MAX8997_CHARGER_TYPE_500MA, MAX8997_CHARGER_TYPE_1A, MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7,}; struct max8997_muic_info { struct device *dev; struct i2c_client *muic; struct extcon_dev *edev; int prev_cable_type; int prev_chg_type; u8 status[2]; int irq; struct work_struct irq_work; struct mutex mutex; struct max8997_muic_platform_data *muic_pdata; enum max8997_muic_charger_type pre_charger_type; /* * 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; /* * 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;}; static const unsigned int max8997_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_CHG_USB_FAST, EXTCON_CHG_USB_SLOW, EXTCON_CHG_USB_CDP, EXTCON_DISP_MHL, EXTCON_DOCK, EXTCON_JIG, EXTCON_NONE,}; /* * max8997_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max8997 MUIC * @time: the debounce time of ADC */static int max8997_muic_set_debounce_time(struct max8997_muic_info *info, enum max8997_muic_adc_debounce_time time){ int ret; switch (time) { case ADC_DEBOUNCE_TIME_0_5MS: case ADC_DEBOUNCE_TIME_10MS: case ADC_DEBOUNCE_TIME_25MS: case ADC_DEBOUNCE_TIME_38_62MS: ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL3, 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;}; /* * max8997_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max8997 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max8997 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 max8997_muic_set_path(struct max8997_muic_info *info, u8 val, bool attached){ int ret; u8 ctrl1, ctrl2 = 0; if (attached) ctrl1 = val; else ctrl1 = CONTROL1_SW_OPEN; ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1, 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 = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL2, 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;} /* * max8997_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max8997 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. * - MAX8997_CABLE_GROUP_ADC * - MAX8997_CABLE_GROUP_CHG */static int max8997_muic_get_cable_type(struct max8997_muic_info *info, enum max8997_muic_cable_group group, bool *attached){ int cable_type = 0; int adc; int chg_type; switch (group) { case MAX8997_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 == MAX8997_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX8997_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX8997_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 == MAX8997_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX8997_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; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type;} static int max8997_muic_handle_usb(struct max8997_muic_info *info, enum max8997_muic_usb_type usb_type, bool attached){ int ret = 0; ret = max8997_muic_set_path(info, info->path_usb, attached); if (ret < 0) { dev_err(info->dev, "failed to update muic register\n"); return ret; } switch (usb_type) { case MAX8997_USB_HOST: extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); break; case MAX8997_USB_DEVICE: extcon_set_state_sync(info->edev, EXTCON_USB, attached); extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, attached); break; default: dev_err(info->dev, "failed to detect %s usb cable\n", attached ? "attached" : "detached"); return -EINVAL; } return 0;} static int max8997_muic_handle_dock(struct max8997_muic_info *info, int cable_type, bool attached){ int ret = 0; ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); return ret; } switch (cable_type) { case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); break; default: dev_err(info->dev, "failed to detect %s dock device\n", attached ? "attached" : "detached"); return -EINVAL; } return 0;} static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, bool attached){ int ret = 0; /* switch to UART */ ret = max8997_muic_set_path(info, info->path_uart, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); return ret; } extcon_set_state_sync(info->edev, EXTCON_JIG, attached); return 0;} static int max8997_muic_adc_handler(struct max8997_muic_info *info){ int cable_type; bool attached; int ret = 0; /* Check cable state which is either detached or attached */ cable_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, &attached); switch (cable_type) { case MAX8997_MUIC_ADC_GROUND: ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_MHL: extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); break; case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: ret = max8997_muic_handle_dock(info, cable_type, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: ret = max8997_muic_handle_jig_uart(info, attached); break; case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON: case MAX8997_MUIC_ADC_RESERVED_ACC_1: case MAX8997_MUIC_ADC_RESERVED_ACC_2: case MAX8997_MUIC_ADC_RESERVED_ACC_3: case MAX8997_MUIC_ADC_RESERVED_ACC_4: case MAX8997_MUIC_ADC_RESERVED_ACC_5: case MAX8997_MUIC_ADC_CEA936_AUDIO: case MAX8997_MUIC_ADC_PHONE_POWERED_DEV: case MAX8997_MUIC_ADC_TTY_CONVERTER: case MAX8997_MUIC_ADC_UART_CABLE: case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG: case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG: case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE: /* * This cable isn't used in general case if it is specially * needed to detect additional cable, should implement * proper operation when this cable is attached/detached. */ dev_info(info->dev, "cable is %s but it isn't used (type:0x%x)\n", attached ? "attached" : "detached", cable_type); return -EAGAIN; default: dev_err(info->dev, "failed to detect %s unknown cable (type:0x%x)\n", attached ? "attached" : "detached", cable_type); return -EINVAL; } return 0;} static int max8997_muic_chg_handler(struct max8997_muic_info *info){ int chg_type; bool attached; int adc; chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG, &attached); switch (chg_type) { case MAX8997_CHARGER_TYPE_NONE: break; case MAX8997_CHARGER_TYPE_USB: adc = info->status[0] & STATUS1_ADC_MASK; adc >>= STATUS1_ADC_SHIFT; if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); } break; case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, attached); break; case MAX8997_CHARGER_TYPE_DEDICATED_CHG: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); break; case MAX8997_CHARGER_TYPE_500MA: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, attached); break; case MAX8997_CHARGER_TYPE_1A: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, attached); break; default: dev_err(info->dev, "failed to detect %s unknown chg cable (type:0x%x)\n",Lines 1–500 of 776. 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// SPDX-License-Identifier: GPL-2.0+ // // extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC // // Copyright (C) 2012 Samsung Electronics // Donggeun Kim <dg77.kim@samsung.com> #include <linux/devm-helpers.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/kobject.h> #include <linux/mfd/max8997.h> #include <linux/mfd/max8997-private.h> #include <linux/extcon-provider.h> #include <linux/irqdomain.h> #define DEV_NAME "max8997-muic" #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ enum max8997_muic_adc_debounce_time { ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */ ADC_DEBOUNCE_TIME_10MS, /* 10ms */ ADC_DEBOUNCE_TIME_25MS, /* 25ms */ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */ }; struct max8997_muic_irq { unsigned int irq; const char *name; unsigned int virq; }; static struct max8997_muic_irq muic_irqs[] = { { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" }, { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" }, { MAX8997_MUICIRQ_ADC, "muic-ADC" }, { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" }, { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" }, { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" }, { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" }, { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" }, { MAX8997_MUICIRQ_OVP, "muic-OVP" }, { MAX8997_PMICIRQ_CHGINS, "pmic-CHGINS" }, { MAX8997_PMICIRQ_CHGRM, "pmic-CHGRM" }, }; /* Define supported cable type */ enum max8997_muic_acc_type { MAX8997_MUIC_ADC_GROUND = 0x0, MAX8997_MUIC_ADC_MHL, /* MHL*/ MAX8997_MUIC_ADC_REMOTE_S1_BUTTON, MAX8997_MUIC_ADC_REMOTE_S2_BUTTON, MAX8997_MUIC_ADC_REMOTE_S3_BUTTON, MAX8997_MUIC_ADC_REMOTE_S4_BUTTON, MAX8997_MUIC_ADC_REMOTE_S5_BUTTON, MAX8997_MUIC_ADC_REMOTE_S6_BUTTON, MAX8997_MUIC_ADC_REMOTE_S7_BUTTON, MAX8997_MUIC_ADC_REMOTE_S8_BUTTON, MAX8997_MUIC_ADC_REMOTE_S9_BUTTON, MAX8997_MUIC_ADC_REMOTE_S10_BUTTON, MAX8997_MUIC_ADC_REMOTE_S11_BUTTON, MAX8997_MUIC_ADC_REMOTE_S12_BUTTON, MAX8997_MUIC_ADC_RESERVED_ACC_1, MAX8997_MUIC_ADC_RESERVED_ACC_2, MAX8997_MUIC_ADC_RESERVED_ACC_3, MAX8997_MUIC_ADC_RESERVED_ACC_4, MAX8997_MUIC_ADC_RESERVED_ACC_5, MAX8997_MUIC_ADC_CEA936_AUDIO, MAX8997_MUIC_ADC_PHONE_POWERED_DEV, MAX8997_MUIC_ADC_TTY_CONVERTER, MAX8997_MUIC_ADC_UART_CABLE, MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG, MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */ MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */ MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */ MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG, MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */ MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */ MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE, MAX8997_MUIC_ADC_OPEN, /* OPEN */ }; enum max8997_muic_cable_group { MAX8997_CABLE_GROUP_ADC = 0, MAX8997_CABLE_GROUP_ADC_GND, MAX8997_CABLE_GROUP_CHG, MAX8997_CABLE_GROUP_VBVOLT, }; enum max8997_muic_usb_type { MAX8997_USB_HOST, MAX8997_USB_DEVICE, }; enum max8997_muic_charger_type { MAX8997_CHARGER_TYPE_NONE = 0, MAX8997_CHARGER_TYPE_USB, MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT, MAX8997_CHARGER_TYPE_DEDICATED_CHG, MAX8997_CHARGER_TYPE_500MA, MAX8997_CHARGER_TYPE_1A, MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7, }; struct max8997_muic_info { struct device *dev; struct i2c_client *muic; struct extcon_dev *edev; int prev_cable_type; int prev_chg_type; u8 status[2]; int irq; struct work_struct irq_work; struct mutex mutex; struct max8997_muic_platform_data *muic_pdata; enum max8997_muic_charger_type pre_charger_type; /* * 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; /* * 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; }; static const unsigned int max8997_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_CHG_USB_FAST, EXTCON_CHG_USB_SLOW, EXTCON_CHG_USB_CDP, EXTCON_DISP_MHL, EXTCON_DOCK, EXTCON_JIG, EXTCON_NONE, }; /* * max8997_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max8997 MUIC * @time: the debounce time of ADC */ static int max8997_muic_set_debounce_time(struct max8997_muic_info *info, enum max8997_muic_adc_debounce_time time) { int ret; switch (time) { case ADC_DEBOUNCE_TIME_0_5MS: case ADC_DEBOUNCE_TIME_10MS: case ADC_DEBOUNCE_TIME_25MS: case ADC_DEBOUNCE_TIME_38_62MS: ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL3, 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; }; /* * max8997_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max8997 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max8997 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 max8997_muic_set_path(struct max8997_muic_info *info, u8 val, bool attached) { int ret; u8 ctrl1, ctrl2 = 0; if (attached) ctrl1 = val; else ctrl1 = CONTROL1_SW_OPEN; ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1, 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 = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL2, 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; } /* * max8997_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max8997 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. * - MAX8997_CABLE_GROUP_ADC * - MAX8997_CABLE_GROUP_CHG */ static int max8997_muic_get_cable_type(struct max8997_muic_info *info, enum max8997_muic_cable_group group, bool *attached) { int cable_type = 0; int adc; int chg_type; switch (group) { case MAX8997_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 == MAX8997_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX8997_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX8997_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 == MAX8997_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX8997_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; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type; } static int max8997_muic_handle_usb(struct max8997_muic_info *info, enum max8997_muic_usb_type usb_type, bool attached) { int ret = 0; ret = max8997_muic_set_path(info, info->path_usb, attached); if (ret < 0) { dev_err(info->dev, "failed to update muic register\n"); return ret; } switch (usb_type) { case MAX8997_USB_HOST: extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); break; case MAX8997_USB_DEVICE: extcon_set_state_sync(info->edev, EXTCON_USB, attached); extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, attached); break; default: dev_err(info->dev, "failed to detect %s usb cable\n", attached ? "attached" : "detached"); return -EINVAL; } return 0; } static int max8997_muic_handle_dock(struct max8997_muic_info *info, int cable_type, bool attached) { int ret = 0; ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); return ret; } switch (cable_type) { case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); break; default: dev_err(info->dev, "failed to detect %s dock device\n", attached ? "attached" : "detached"); return -EINVAL; } return 0; } static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, bool attached) { int ret = 0; /* switch to UART */ ret = max8997_muic_set_path(info, info->path_uart, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); return ret; } extcon_set_state_sync(info->edev, EXTCON_JIG, attached); return 0; } static int max8997_muic_adc_handler(struct max8997_muic_info *info) { int cable_type; bool attached; int ret = 0; /* Check cable state which is either detached or attached */ cable_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, &attached); switch (cable_type) { case MAX8997_MUIC_ADC_GROUND: ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_MHL: extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); break; case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: ret = max8997_muic_handle_dock(info, cable_type, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: ret = max8997_muic_handle_jig_uart(info, attached); break; case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON: case MAX8997_MUIC_ADC_RESERVED_ACC_1: case MAX8997_MUIC_ADC_RESERVED_ACC_2: case MAX8997_MUIC_ADC_RESERVED_ACC_3: case MAX8997_MUIC_ADC_RESERVED_ACC_4: case MAX8997_MUIC_ADC_RESERVED_ACC_5: case MAX8997_MUIC_ADC_CEA936_AUDIO: case MAX8997_MUIC_ADC_PHONE_POWERED_DEV: case MAX8997_MUIC_ADC_TTY_CONVERTER: case MAX8997_MUIC_ADC_UART_CABLE: case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG: case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG: case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE: /* * This cable isn't used in general case if it is specially * needed to detect additional cable, should implement * proper operation when this cable is attached/detached. */ dev_info(info->dev, "cable is %s but it isn't used (type:0x%x)\n", attached ? "attached" : "detached", cable_type); return -EAGAIN; default: dev_err(info->dev, "failed to detect %s unknown cable (type:0x%x)\n", attached ? "attached" : "detached", cable_type); return -EINVAL; } return 0; } static int max8997_muic_chg_handler(struct max8997_muic_info *info) { int chg_type; bool attached; int adc; chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG, &attached); switch (chg_type) { case MAX8997_CHARGER_TYPE_NONE: break; case MAX8997_CHARGER_TYPE_USB: adc = info->status[0] & STATUS1_ADC_MASK; adc >>= STATUS1_ADC_SHIFT; if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); } break; case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, attached); break; case MAX8997_CHARGER_TYPE_DEDICATED_CHG: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); break; case MAX8997_CHARGER_TYPE_500MA: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, attached); break; case MAX8997_CHARGER_TYPE_1A: extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, attached); break; default: dev_err(info->dev, "failed to detect %s unknown chg cable (type:0x%x)\n",