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995bb10923
extcon_get_edev_name() function provides client driver to request extcon dev's name. If extcon driver and client driver are compiled as loadable modules, extcon_get_edev_name() function symbol is not visible to client driver. Hence mark extcon_find_edev_name() function as exported symbol. Signed-off-by: Mayank Rana <mrana@codeaurora.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
318 lines
9.6 KiB
C
318 lines
9.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* External Connector (extcon) framework
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* - linux/include/linux/extcon.h for extcon consumer device driver.
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*
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* Copyright (C) 2015 Samsung Electronics
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* Author: Chanwoo Choi <cw00.choi@samsung.com>
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*
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* Copyright (C) 2012 Samsung Electronics
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* Author: Donggeun Kim <dg77.kim@samsung.com>
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* Author: MyungJoo Ham <myungjoo.ham@samsung.com>
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*
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* based on switch class driver
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* Copyright (C) 2008 Google, Inc.
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* Author: Mike Lockwood <lockwood@android.com>
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*/
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#ifndef __LINUX_EXTCON_H__
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#define __LINUX_EXTCON_H__
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#include <linux/device.h>
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/*
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* Define the type of supported external connectors
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*/
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#define EXTCON_TYPE_USB BIT(0) /* USB connector */
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#define EXTCON_TYPE_CHG BIT(1) /* Charger connector */
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#define EXTCON_TYPE_JACK BIT(2) /* Jack connector */
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#define EXTCON_TYPE_DISP BIT(3) /* Display connector */
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#define EXTCON_TYPE_MISC BIT(4) /* Miscellaneous connector */
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/*
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* Define the unique id of supported external connectors
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*/
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#define EXTCON_NONE 0
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/* USB external connector */
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#define EXTCON_USB 1
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#define EXTCON_USB_HOST 2
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/*
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* Charging external connector
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*
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* When one SDP charger connector was reported, we should also report
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* the USB connector, which means EXTCON_CHG_USB_SDP should always
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* appear together with EXTCON_USB. The same as ACA charger connector,
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* EXTCON_CHG_USB_ACA would normally appear with EXTCON_USB_HOST.
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*
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* The EXTCON_CHG_USB_SLOW connector can provide at least 500mA of
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* current at 5V. The EXTCON_CHG_USB_FAST connector can provide at
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* least 1A of current at 5V.
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*/
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#define EXTCON_CHG_USB_SDP 5 /* Standard Downstream Port */
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#define EXTCON_CHG_USB_DCP 6 /* Dedicated Charging Port */
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#define EXTCON_CHG_USB_CDP 7 /* Charging Downstream Port */
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#define EXTCON_CHG_USB_ACA 8 /* Accessory Charger Adapter */
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#define EXTCON_CHG_USB_FAST 9
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#define EXTCON_CHG_USB_SLOW 10
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#define EXTCON_CHG_WPT 11 /* Wireless Power Transfer */
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#define EXTCON_CHG_USB_PD 12 /* USB Power Delivery */
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/* Jack external connector */
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#define EXTCON_JACK_MICROPHONE 20
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#define EXTCON_JACK_HEADPHONE 21
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#define EXTCON_JACK_LINE_IN 22
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#define EXTCON_JACK_LINE_OUT 23
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#define EXTCON_JACK_VIDEO_IN 24
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#define EXTCON_JACK_VIDEO_OUT 25
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#define EXTCON_JACK_SPDIF_IN 26 /* Sony Philips Digital InterFace */
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#define EXTCON_JACK_SPDIF_OUT 27
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/* Display external connector */
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#define EXTCON_DISP_HDMI 40 /* High-Definition Multimedia Interface */
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#define EXTCON_DISP_MHL 41 /* Mobile High-Definition Link */
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#define EXTCON_DISP_DVI 42 /* Digital Visual Interface */
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#define EXTCON_DISP_VGA 43 /* Video Graphics Array */
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#define EXTCON_DISP_DP 44 /* Display Port */
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#define EXTCON_DISP_HMD 45 /* Head-Mounted Display */
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/* Miscellaneous external connector */
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#define EXTCON_DOCK 60
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#define EXTCON_JIG 61
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#define EXTCON_MECHANICAL 62
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#define EXTCON_NUM 63
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/*
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* Define the properties of supported external connectors.
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*
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* When adding the new extcon property, they *must* have
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* the type/value/default information. Also, you *have to*
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* modify the EXTCON_PROP_[type]_START/END definitions
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* which mean the range of the supported properties
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* for each extcon type.
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*
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* The naming style of property
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* : EXTCON_PROP_[type]_[property name]
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*
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* EXTCON_PROP_USB_[property name] : USB property
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* EXTCON_PROP_CHG_[property name] : Charger property
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* EXTCON_PROP_JACK_[property name] : Jack property
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* EXTCON_PROP_DISP_[property name] : Display property
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*/
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/*
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* Properties of EXTCON_TYPE_USB.
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*
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* - EXTCON_PROP_USB_VBUS
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* @type: integer (intval)
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* @value: 0 (low) or 1 (high)
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* @default: 0 (low)
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* - EXTCON_PROP_USB_TYPEC_POLARITY
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* @type: integer (intval)
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* @value: 0 (normal) or 1 (flip)
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* @default: 0 (normal)
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* - EXTCON_PROP_USB_SS (SuperSpeed)
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* @type: integer (intval)
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* @value: 0 (USB/USB2) or 1 (USB3)
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* @default: 0 (USB/USB2)
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*
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*/
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#define EXTCON_PROP_USB_VBUS 0
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#define EXTCON_PROP_USB_TYPEC_POLARITY 1
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#define EXTCON_PROP_USB_SS 2
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#define EXTCON_PROP_USB_MIN 0
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#define EXTCON_PROP_USB_MAX 2
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#define EXTCON_PROP_USB_CNT (EXTCON_PROP_USB_MAX - EXTCON_PROP_USB_MIN + 1)
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/* Properties of EXTCON_TYPE_CHG. */
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#define EXTCON_PROP_CHG_MIN 50
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#define EXTCON_PROP_CHG_MAX 50
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#define EXTCON_PROP_CHG_CNT (EXTCON_PROP_CHG_MAX - EXTCON_PROP_CHG_MIN + 1)
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/* Properties of EXTCON_TYPE_JACK. */
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#define EXTCON_PROP_JACK_MIN 100
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#define EXTCON_PROP_JACK_MAX 100
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#define EXTCON_PROP_JACK_CNT (EXTCON_PROP_JACK_MAX - EXTCON_PROP_JACK_MIN + 1)
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/*
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* Properties of EXTCON_TYPE_DISP.
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*
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* - EXTCON_PROP_DISP_HPD (Hot Plug Detect)
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* @type: integer (intval)
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* @value: 0 (no hpd) or 1 (hpd)
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* @default: 0 (no hpd)
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*
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*/
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#define EXTCON_PROP_DISP_HPD 150
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/* Properties of EXTCON_TYPE_DISP. */
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#define EXTCON_PROP_DISP_MIN 150
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#define EXTCON_PROP_DISP_MAX 151
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#define EXTCON_PROP_DISP_CNT (EXTCON_PROP_DISP_MAX - EXTCON_PROP_DISP_MIN + 1)
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/*
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* Define the type of property's value.
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*
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* Define the property's value as union type. Because each property
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* would need the different data type to store it.
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*/
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union extcon_property_value {
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int intval; /* type : integer (intval) */
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};
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struct extcon_dev;
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#if IS_ENABLED(CONFIG_EXTCON)
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/*
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* Following APIs get the connected state of each external connector.
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* The 'id' argument indicates the defined external connector.
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*/
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int extcon_get_state(struct extcon_dev *edev, unsigned int id);
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/*
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* Following APIs get the property of each external connector.
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* The 'id' argument indicates the defined external connector
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* and the 'prop' indicates the extcon property.
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*
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* And extcon_get_property_capability() get the capability of the property
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* for each external connector. They are used to get the capability of the
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* property of each external connector based on the id and property.
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*/
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int extcon_get_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value *prop_val);
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int extcon_get_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop);
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/*
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* Following APIs register the notifier block in order to detect
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* the change of both state and property value for each external connector.
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*
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* extcon_register_notifier(*edev, id, *nb) : Register a notifier block
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* for specific external connector of the extcon.
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* extcon_register_notifier_all(*edev, *nb) : Register a notifier block
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* for all supported external connectors of the extcon.
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*/
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int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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int devm_extcon_register_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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void devm_extcon_unregister_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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int extcon_register_notifier_all(struct extcon_dev *edev,
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struct notifier_block *nb);
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int extcon_unregister_notifier_all(struct extcon_dev *edev,
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struct notifier_block *nb);
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int devm_extcon_register_notifier_all(struct device *dev,
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struct extcon_dev *edev,
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struct notifier_block *nb);
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void devm_extcon_unregister_notifier_all(struct device *dev,
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struct extcon_dev *edev,
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struct notifier_block *nb);
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/*
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* Following APIs get the extcon_dev from devicetree or by through extcon name.
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*/
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struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
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struct extcon_dev *extcon_find_edev_by_node(struct device_node *node);
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struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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int index);
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/* Following API get the name of extcon device. */
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const char *extcon_get_edev_name(struct extcon_dev *edev);
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#else /* CONFIG_EXTCON */
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static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
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{
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return 0;
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}
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static inline int extcon_get_property(struct extcon_dev *edev, unsigned int id,
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unsigned int prop,
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union extcon_property_value *prop_val)
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{
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return 0;
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}
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static inline int extcon_get_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop)
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{
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return 0;
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}
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static inline int extcon_register_notifier(struct extcon_dev *edev,
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unsigned int id, struct notifier_block *nb)
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{
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return 0;
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}
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static inline int extcon_unregister_notifier(struct extcon_dev *edev,
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unsigned int id, struct notifier_block *nb)
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{
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return 0;
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}
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static inline int devm_extcon_register_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb)
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{
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return -ENOSYS;
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}
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static inline void devm_extcon_unregister_notifier(struct device *dev,
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struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb) { }
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static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct extcon_dev *extcon_find_edev_by_node(struct device_node *node)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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int index)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline const char *extcon_get_edev_name(struct extcon_dev *edev)
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{
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return NULL;
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}
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#endif /* CONFIG_EXTCON */
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/*
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* Following structure and API are deprecated. EXTCON remains the function
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* definition to prevent the build break.
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*/
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struct extcon_specific_cable_nb {
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struct notifier_block *user_nb;
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int cable_index;
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struct extcon_dev *edev;
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unsigned long previous_value;
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};
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static inline int extcon_register_interest(struct extcon_specific_cable_nb *obj,
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const char *extcon_name, const char *cable_name,
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struct notifier_block *nb)
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{
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return -EINVAL;
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}
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static inline int extcon_unregister_interest(struct extcon_specific_cable_nb *obj)
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{
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return -EINVAL;
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}
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#endif /* __LINUX_EXTCON_H__ */
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