426 строки
13 KiB
C
426 строки
13 KiB
C
/*
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* External connector (extcon) class 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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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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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 property 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_cable;
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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 are for notifiers or configurations.
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* Notifiers are the external port and connection devices.
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*/
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extern int extcon_dev_register(struct extcon_dev *edev);
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extern void extcon_dev_unregister(struct extcon_dev *edev);
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extern int devm_extcon_dev_register(struct device *dev,
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struct extcon_dev *edev);
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extern void devm_extcon_dev_unregister(struct device *dev,
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struct extcon_dev *edev);
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extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
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/*
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* Following APIs control the memory of extcon device.
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*/
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extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
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extern void extcon_dev_free(struct extcon_dev *edev);
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extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
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const unsigned int *cable);
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extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
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/*
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* get/set_state access each bit of the 32b encoded state value.
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* They are used to access the status of each cable based on the cable id.
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*/
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extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
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extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
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bool cable_state);
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extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
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bool cable_state);
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/*
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* Synchronize the state and property data for a specific external connector.
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*/
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extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
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/*
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* get/set_property access the property value of each external connector.
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* They are used to access the property of each cable based on the property id.
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*/
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extern 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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extern int extcon_set_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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extern int extcon_set_property_sync(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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* get/set_property_capability set the capability of the property for each
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* external connector. They are used to set the capability of the property
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* of each external connector based on the id and property.
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*/
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extern int extcon_get_property_capability(struct extcon_dev *edev,
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unsigned int id, unsigned int prop);
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extern int extcon_set_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 are to monitor every action of a notifier.
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* Registrar gets notified for every external port of a connection device.
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* Probably this could be used to debug an action of notifier; however,
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* we do not recommend to use this for normal 'notifiee' device drivers who
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* want to be notified by a specific external port of the notifier.
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*/
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extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
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struct notifier_block *nb);
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extern 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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extern 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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/*
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* Following API get the extcon device from devicetree.
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* This function use phandle of devicetree to get extcon device directly.
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*/
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extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
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int index);
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/* Following API to get information of extcon device */
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extern 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_dev_register(struct extcon_dev *edev)
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{
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return 0;
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}
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static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
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static inline int devm_extcon_dev_register(struct device *dev,
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struct extcon_dev *edev)
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{
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return -EINVAL;
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}
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static inline void devm_extcon_dev_unregister(struct device *dev,
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struct extcon_dev *edev) { }
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static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline void extcon_dev_free(struct extcon_dev *edev) { }
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static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
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const unsigned int *cable)
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{
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return ERR_PTR(-ENOSYS);
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}
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static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
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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_set_state(struct extcon_dev *edev, unsigned int id,
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bool cable_state)
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{
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return 0;
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}
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static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
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bool cable_state)
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{
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return 0;
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}
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static inline int extcon_sync(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_set_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_set_property_sync(struct extcon_dev *edev,
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unsigned int id, 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_set_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 struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
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{
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return NULL;
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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,
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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,
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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_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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#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
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*obj)
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{
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return -EINVAL;
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}
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static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
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{
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return extcon_get_state(edev, id);
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}
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static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
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bool cable_state)
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{
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return extcon_set_state_sync(edev, id, cable_state);
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}
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#endif /* __LINUX_EXTCON_H__ */
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