469 lines
14 KiB
C
469 lines
14 KiB
C
/*
|
|
* External connector (extcon) class 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>
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
*/
|
|
|
|
#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 */
|
|
#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 */
|
|
|
|
/* 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 property 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_cable;
|
|
|
|
/**
|
|
* struct extcon_dev - An extcon device represents one external connector.
|
|
* @name: The name of this extcon device. Parent device name is
|
|
* used if NULL.
|
|
* @supported_cable: Array of supported cable names ending with EXTCON_NONE.
|
|
* If supported_cable is NULL, cable name related APIs
|
|
* are disabled.
|
|
* @mutually_exclusive: Array of mutually exclusive set of cables that cannot
|
|
* be attached simultaneously. The array should be
|
|
* ending with NULL or be NULL (no mutually exclusive
|
|
* cables). For example, if it is { 0x7, 0x30, 0}, then,
|
|
* {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot
|
|
* be attached simulataneously. {0x7, 0} is equivalent to
|
|
* {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there
|
|
* can be no simultaneous connections.
|
|
* @dev: Device of this extcon.
|
|
* @state: Attach/detach state of this extcon. Do not provide at
|
|
* register-time.
|
|
* @nh: Notifier for the state change events from this extcon
|
|
* @entry: To support list of extcon devices so that users can
|
|
* search for extcon devices based on the extcon name.
|
|
* @lock:
|
|
* @max_supported: Internal value to store the number of cables.
|
|
* @extcon_dev_type: Device_type struct to provide attribute_groups
|
|
* customized for each extcon device.
|
|
* @cables: Sysfs subdirectories. Each represents one cable.
|
|
*
|
|
* In most cases, users only need to provide "User initializing data" of
|
|
* this struct when registering an extcon. In some exceptional cases,
|
|
* optional callbacks may be needed. However, the values in "internal data"
|
|
* are overwritten by register function.
|
|
*/
|
|
struct extcon_dev {
|
|
/* Optional user initializing data */
|
|
const char *name;
|
|
const unsigned int *supported_cable;
|
|
const u32 *mutually_exclusive;
|
|
|
|
/* Internal data. Please do not set. */
|
|
struct device dev;
|
|
struct raw_notifier_head *nh;
|
|
struct list_head entry;
|
|
int max_supported;
|
|
spinlock_t lock; /* could be called by irq handler */
|
|
u32 state;
|
|
|
|
/* /sys/class/extcon/.../cable.n/... */
|
|
struct device_type extcon_dev_type;
|
|
struct extcon_cable *cables;
|
|
|
|
/* /sys/class/extcon/.../mutually_exclusive/... */
|
|
struct attribute_group attr_g_muex;
|
|
struct attribute **attrs_muex;
|
|
struct device_attribute *d_attrs_muex;
|
|
};
|
|
|
|
#if IS_ENABLED(CONFIG_EXTCON)
|
|
|
|
/*
|
|
* Following APIs are for notifiers or configurations.
|
|
* Notifiers are the external port and connection devices.
|
|
*/
|
|
extern int extcon_dev_register(struct extcon_dev *edev);
|
|
extern void extcon_dev_unregister(struct extcon_dev *edev);
|
|
extern int devm_extcon_dev_register(struct device *dev,
|
|
struct extcon_dev *edev);
|
|
extern void devm_extcon_dev_unregister(struct device *dev,
|
|
struct extcon_dev *edev);
|
|
extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
|
|
|
|
/*
|
|
* Following APIs control the memory of extcon device.
|
|
*/
|
|
extern struct extcon_dev *extcon_dev_allocate(const unsigned int *cable);
|
|
extern void extcon_dev_free(struct extcon_dev *edev);
|
|
extern struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
|
|
const unsigned int *cable);
|
|
extern void devm_extcon_dev_free(struct device *dev, struct extcon_dev *edev);
|
|
|
|
/*
|
|
* get/set_state access each bit of the 32b encoded state value.
|
|
* They are used to access the status of each cable based on the cable id.
|
|
*/
|
|
extern int extcon_get_state(struct extcon_dev *edev, unsigned int id);
|
|
extern int extcon_set_state(struct extcon_dev *edev, unsigned int id,
|
|
bool cable_state);
|
|
extern int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
|
|
bool cable_state);
|
|
/*
|
|
* Synchronize the state and property data for a specific external connector.
|
|
*/
|
|
extern int extcon_sync(struct extcon_dev *edev, unsigned int id);
|
|
|
|
/*
|
|
* get/set_property access the property value of each external connector.
|
|
* They are used to access the property of each cable based on the property id.
|
|
*/
|
|
extern int extcon_get_property(struct extcon_dev *edev, unsigned int id,
|
|
unsigned int prop,
|
|
union extcon_property_value *prop_val);
|
|
extern int extcon_set_property(struct extcon_dev *edev, unsigned int id,
|
|
unsigned int prop,
|
|
union extcon_property_value prop_val);
|
|
extern int extcon_set_property_sync(struct extcon_dev *edev, unsigned int id,
|
|
unsigned int prop,
|
|
union extcon_property_value prop_val);
|
|
|
|
/*
|
|
* get/set_property_capability set the capability of the property for each
|
|
* external connector. They are used to set the capability of the property
|
|
* of each external connector based on the id and property.
|
|
*/
|
|
extern int extcon_get_property_capability(struct extcon_dev *edev,
|
|
unsigned int id, unsigned int prop);
|
|
extern int extcon_set_property_capability(struct extcon_dev *edev,
|
|
unsigned int id, unsigned int prop);
|
|
|
|
/*
|
|
* Following APIs are to monitor every action of a notifier.
|
|
* Registrar gets notified for every external port of a connection device.
|
|
* Probably this could be used to debug an action of notifier; however,
|
|
* we do not recommend to use this for normal 'notifiee' device drivers who
|
|
* want to be notified by a specific external port of the notifier.
|
|
*/
|
|
extern int extcon_register_notifier(struct extcon_dev *edev, unsigned int id,
|
|
struct notifier_block *nb);
|
|
extern int extcon_unregister_notifier(struct extcon_dev *edev, unsigned int id,
|
|
struct notifier_block *nb);
|
|
extern int devm_extcon_register_notifier(struct device *dev,
|
|
struct extcon_dev *edev, unsigned int id,
|
|
struct notifier_block *nb);
|
|
extern void devm_extcon_unregister_notifier(struct device *dev,
|
|
struct extcon_dev *edev, unsigned int id,
|
|
struct notifier_block *nb);
|
|
|
|
/*
|
|
* Following API get the extcon device from devicetree.
|
|
* This function use phandle of devicetree to get extcon device directly.
|
|
*/
|
|
extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
|
|
int index);
|
|
|
|
/* Following API to get information of extcon device */
|
|
extern const char *extcon_get_edev_name(struct extcon_dev *edev);
|
|
|
|
|
|
#else /* CONFIG_EXTCON */
|
|
static inline int extcon_dev_register(struct extcon_dev *edev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void extcon_dev_unregister(struct extcon_dev *edev) { }
|
|
|
|
static inline int devm_extcon_dev_register(struct device *dev,
|
|
struct extcon_dev *edev)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline void devm_extcon_dev_unregister(struct device *dev,
|
|
struct extcon_dev *edev) { }
|
|
|
|
static inline struct extcon_dev *extcon_dev_allocate(const unsigned int *cable)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline void extcon_dev_free(struct extcon_dev *edev) { }
|
|
|
|
static inline struct extcon_dev *devm_extcon_dev_allocate(struct device *dev,
|
|
const unsigned int *cable)
|
|
{
|
|
return ERR_PTR(-ENOSYS);
|
|
}
|
|
|
|
static inline void devm_extcon_dev_free(struct extcon_dev *edev) { }
|
|
|
|
|
|
static inline int extcon_get_state(struct extcon_dev *edev, unsigned int id)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int extcon_set_state(struct extcon_dev *edev, unsigned int id,
|
|
bool cable_state)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int extcon_set_state_sync(struct extcon_dev *edev, unsigned int id,
|
|
bool cable_state)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int extcon_sync(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_set_property(struct extcon_dev *edev, unsigned int id,
|
|
unsigned int prop,
|
|
union extcon_property_value prop_val)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline int extcon_set_property_sync(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_set_property_capability(struct extcon_dev *edev,
|
|
unsigned int id, unsigned int prop)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
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_edev_by_phandle(struct device *dev,
|
|
int index)
|
|
{
|
|
return ERR_PTR(-ENODEV);
|
|
}
|
|
#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;
|
|
}
|
|
|
|
static inline int extcon_get_cable_state_(struct extcon_dev *edev, unsigned int id)
|
|
{
|
|
return extcon_get_state(edev, id);
|
|
}
|
|
|
|
static inline int extcon_set_cable_state_(struct extcon_dev *edev, unsigned int id,
|
|
bool cable_state)
|
|
{
|
|
return extcon_set_state_sync(edev, id, cable_state);
|
|
}
|
|
#endif /* __LINUX_EXTCON_H__ */
|