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extcon.h
/* 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 */ #define EXTCON_DISP_CVBS 46 /* Composite Video Broadcast Signal */ #define EXTCON_DISP_EDP 47 /* Embedded Display Port */ /* 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 int extcon_register_notifier_all(struct extcon_dev *edev, struct notifier_block *nb) { return 0; } static inline int extcon_unregister_notifier_all(struct extcon_dev *edev, struct notifier_block *nb) { return 0; } static inline int devm_extcon_register_notifier_all(struct device *dev, struct extcon_dev *edev, struct notifier_block *nb) { return 0; } static inline void devm_extcon_unregister_notifier_all(struct device *dev, struct extcon_dev *edev, struct notifier_block *nb) { } static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name) { return NULL; } 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; }; #endif /* __LINUX_EXTCON_H__ */
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