| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * External Connector (extcon) framework |
| * - linux/include/linux/extcon.h for extcon consumer device driver. |
| * |
| * Copyright (C) 2015 Samsung Electronics |
| * Author: Chanwoo Choi <cw00.choi@samsung.com> |
| * |
| * Copyright (C) 2012 Samsung Electronics |
| * Author: Donggeun Kim <dg77.kim@samsung.com> |
| * Author: MyungJoo Ham <myungjoo.ham@samsung.com> |
| * |
| * based on switch class driver |
| * Copyright (C) 2008 Google, Inc. |
| * Author: Mike Lockwood <lockwood@android.com> |
| */ |
| |
| #ifndef __LINUX_EXTCON_H__ |
| #define __LINUX_EXTCON_H__ |
| |
| #include <linux/device.h> |
| |
| /* |
| * Define the type of supported external connectors |
| */ |
| #define EXTCON_TYPE_USB BIT(0) /* USB connector */ |
| #define EXTCON_TYPE_CHG BIT(1) /* Charger connector */ |
| #define EXTCON_TYPE_JACK BIT(2) /* Jack connector */ |
| #define EXTCON_TYPE_DISP BIT(3) /* Display connector */ |
| #define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */ |
| |
| /* |
| * Define the unique id of supported external connectors |
| */ |
| #define EXTCON_NONE 0 |
| |
| /* USB external connector */ |
| #define EXTCON_USB 1 |
| #define EXTCON_USB_HOST 2 |
| |
| /* |
| * Charging external connector |
| * |
| * When one SDP charger connector was reported, we should also report |
| * the USB connector, which means EXTCON_CHG_USB_SDP should always |
| * appear together with EXTCON_USB. The same as ACA charger connector, |
| * EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST. |
| * |
| * The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of |
| * current at 5V. The EXTCON_CHG_USB_FAST connector can provide at |
| * least 1A of current at 5V. |
| */ |
| #define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */ |
| #define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */ |
| #define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */ |
| #define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */ |
| #define EXTCON_CHG_USB_FAST 9 |
| #define EXTCON_CHG_USB_SLOW 10 |
| #define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */ |
| #define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */ |
| |
| /* Jack external connector */ |
| #define EXTCON_JACK_MICROPHONE 20 |
| #define EXTCON_JACK_HEADPHONE 21 |
| #define EXTCON_JACK_LINE_IN 22 |
| #define EXTCON_JACK_LINE_OUT 23 |
| #define EXTCON_JACK_VIDEO_IN 24 |
| #define EXTCON_JACK_VIDEO_OUT 25 |
| #define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */ |
| #define EXTCON_JACK_SPDIF_OUT 27 |
| |
| /* Display external connector */ |
| #define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */ |
| #define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */ |
| #define EXTCON_DISP_DVI 42 /* Digital Visual Interface */ |
| #define EXTCON_DISP_VGA 43 /* Video Graphics Array */ |
| #define EXTCON_DISP_DP 44 /* Display Port */ |
| #define EXTCON_DISP_HMD 45 /* Head-Mounted Display */ |
| |
| /* Miscellaneous external connector */ |
| #define EXTCON_DOCK 60 |
| #define EXTCON_JIG 61 |
| #define EXTCON_MECHANICAL 62 |
| |
| #define EXTCON_NUM 63 |
| |
| /* |
| * Define the properties of supported external connectors. |
| * |
| * When adding the new extcon property, they *must* have |
| * the type/value/default information. Also, you *have to* |
| * modify the EXTCON_PROP_[type]_START/END definitions |
| * which mean the range of the supported properties |
| * for each extcon type. |
| * |
| * The naming style of property |
| * : EXTCON_PROP_[type]_[property name] |
| * |
| * EXTCON_PROP_USB_[property name] : USB property |
| * EXTCON_PROP_CHG_[property name] : Charger property |
| * EXTCON_PROP_JACK_[property name] : Jack property |
| * EXTCON_PROP_DISP_[property name] : Display property |
| */ |
| |
| /* |
| * Properties of EXTCON_TYPE_USB. |
| * |
| * - EXTCON_PROP_USB_VBUS |
| * @type: integer (intval) |
| * @value: 0 (low) or 1 (high) |
| * @default: 0 (low) |
| * - EXTCON_PROP_USB_TYPEC_POLARITY |
| * @type: integer (intval) |
| * @value: 0 (normal) or 1 (flip) |
| * @default: 0 (normal) |
| * - EXTCON_PROP_USB_SS (SuperSpeed) |
| * @type: integer (intval) |
| * @value: 0 (USB/USB2) or 1 (USB3) |
| * @default: 0 (USB/USB2) |
| * |
| */ |
| #define EXTCON_PROP_USB_VBUS 0 |
| #define EXTCON_PROP_USB_TYPEC_POLARITY 1 |
| #define EXTCON_PROP_USB_SS 2 |
| |
| #define EXTCON_PROP_USB_MIN 0 |
| #define EXTCON_PROP_USB_MAX 2 |
| #define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1) |
| |
| /* Properties of EXTCON_TYPE_CHG. */ |
| #define EXTCON_PROP_CHG_MIN 50 |
| #define EXTCON_PROP_CHG_MAX 50 |
| #define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1) |
| |
| /* Properties of EXTCON_TYPE_JACK. */ |
| #define EXTCON_PROP_JACK_MIN 100 |
| #define EXTCON_PROP_JACK_MAX 100 |
| #define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1) |
| |
| /* |
| * Properties of EXTCON_TYPE_DISP. |
| * |
| * - EXTCON_PROP_DISP_HPD (Hot Plug Detect) |
| * @type: integer (intval) |
| * @value: 0 (no hpd) or 1 (hpd) |
| * @default: 0 (no hpd) |
| * |
| */ |
| #define EXTCON_PROP_DISP_HPD 150 |
| |
| /* Properties of EXTCON_TYPE_DISP. */ |
| #define EXTCON_PROP_DISP_MIN 150 |
| #define EXTCON_PROP_DISP_MAX 151 |
| #define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1) |
| |
| /* |
| * Define the type of property's value. |
| * |
| * Define the property's value as union type. Because each property |
| * would need the different data type to store it. |
| */ |
| union extcon_property_value { |
| int intval; /* type : integer (intval) */ |
| }; |
| |
| struct extcon_dev; |
| |
| #if IS_ENABLED(CONFIG_EXTCON) |
| /* |
| * Following APIs get the connected state of each external connector. |
| * The 'id' argument indicates the defined external connector. |
| */ |
| int extcon_get_state(struct extcon_dev *edev, unsigned int id); |
| |
| /* |
| * Following APIs get the property of each external connector. |
| * The 'id' argument indicates the defined external connector |
| * and the 'prop' indicates the extcon property. |
| * |
| * And extcon_get_property_capability() get the capability of the property |
| * for each external connector. They are used to get the capability of the |
| * property of each external connector based on the id and property. |
| */ |
| int extcon_get_property(struct extcon_dev *edev, unsigned int id, |
| unsigned int prop, |
| union extcon_property_value *prop_val); |
| int extcon_get_property_capability(struct extcon_dev *edev, |
| unsigned int id, unsigned int prop); |
| |
| /* |
| * Following APIs register the notifier block in order to detect |
| * the change of both state and property value for each external connector. |
| * |
| * extcon_register_notifier(*edev, id, *nb) : Register a notifier block |
| * for specific external connector of the extcon. |
| * extcon_register_notifier_all(*edev, *nb) : Register a notifier block |
| * for all supported external connectors of the extcon. |
| */ |
| int extcon_register_notifier(struct extcon_dev *edev, unsigned int id, |
| struct notifier_block *nb); |
| int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id, |
| struct notifier_block *nb); |
| int devm_extcon_register_notifier(struct device *dev, |
| struct extcon_dev *edev, unsigned int id, |
| struct notifier_block *nb); |
| void devm_extcon_unregister_notifier(struct device *dev, |
| struct extcon_dev *edev, unsigned int id, |
| struct notifier_block *nb); |
| |
| int extcon_register_notifier_all(struct extcon_dev *edev, |
| struct notifier_block *nb); |
| int extcon_unregister_notifier_all(struct extcon_dev *edev, |
| struct notifier_block *nb); |
| int devm_extcon_register_notifier_all(struct device *dev, |
| struct extcon_dev *edev, |
| struct notifier_block *nb); |
| void devm_extcon_unregister_notifier_all(struct device *dev, |
| struct extcon_dev *edev, |
| struct notifier_block *nb); |
| |
| /* |
| * Following APIs get the extcon_dev from devicetree or by through extcon name. |
| */ |
| struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name); |
| struct extcon_dev *extcon_find_edev_by_node(struct device_node *node); |
| struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, |
| int index); |
| |
| /* Following API get the name of extcon device. */ |
| const char *extcon_get_edev_name(struct extcon_dev *edev); |
| |
| #else /* CONFIG_EXTCON */ |
| static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id) |
| { |
| return 0; |
| } |
| |
| static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id, |
| unsigned int prop, |
| union extcon_property_value *prop_val) |
| { |
| return 0; |
| } |
| |
| static inline int extcon_get_property_capability(struct extcon_dev *edev, |
| unsigned int id, unsigned int prop) |
| { |
| return 0; |
| } |
| |
| static inline int extcon_register_notifier(struct extcon_dev *edev, |
| unsigned int id, struct notifier_block *nb) |
| { |
| return 0; |
| } |
| |
| static inline int extcon_unregister_notifier(struct extcon_dev *edev, |
| unsigned int id, struct notifier_block *nb) |
| { |
| return 0; |
| } |
| |
| static inline int devm_extcon_register_notifier(struct device *dev, |
| struct extcon_dev *edev, unsigned int id, |
| struct notifier_block *nb) |
| { |
| return -ENOSYS; |
| } |
| |
| static inline void devm_extcon_unregister_notifier(struct device *dev, |
| struct extcon_dev *edev, unsigned int id, |
| struct notifier_block *nb) { } |
| |
| static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) |
| { |
| return ERR_PTR(-ENODEV); |
| } |
| |
| static inline struct extcon_dev *extcon_find_edev_by_node(struct device_node *node) |
| { |
| return ERR_PTR(-ENODEV); |
| } |
| |
| static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, |
| int index) |
| { |
| return ERR_PTR(-ENODEV); |
| } |
| |
| static inline const char *extcon_get_edev_name(struct extcon_dev *edev) |
| { |
| return NULL; |
| } |
| #endif /* CONFIG_EXTCON */ |
| |
| /* |
| * Following structure and API are deprecated. EXTCON remains the function |
| * definition to prevent the build break. |
| */ |
| struct extcon_specific_cable_nb { |
| struct notifier_block *user_nb; |
| int cable_index; |
| struct extcon_dev *edev; |
| unsigned long previous_value; |
| }; |
| |
| static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj, |
| const char *extcon_name, const char *cable_name, |
| struct notifier_block *nb) |
| { |
| return -EINVAL; |
| } |
| |
| static inline int extcon_unregister_interest(struct extcon_specific_cable_nb *obj) |
| { |
| return -EINVAL; |
| } |
| #endif /* __LINUX_EXTCON_H__ */ |
