342 lines
10 KiB
C
342 lines
10 KiB
C
/* 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 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;
|
|
};
|
|
|
|
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__ */
|