- 根目录:
- include
- linux
- rfkill.h
#ifndef __RFKILL_H
#define __RFKILL_H
/*
* Copyright (C) 2006 - 2007 Ivo van Doorn
* Copyright (C) 2007 Dmitry Torokhov
* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <linux/types.h>
/* define userspace visible states */
#define RFKILL_STATE_SOFT_BLOCKED 0
#define RFKILL_STATE_UNBLOCKED 1
#define RFKILL_STATE_HARD_BLOCKED 2
/**
* enum rfkill_type - type of rfkill switch.
*
* @RFKILL_TYPE_ALL: toggles all switches (requests only - not a switch type)
* @RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device.
* @RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device.
* @RFKILL_TYPE_UWB: switch is on a ultra wideband device.
* @RFKILL_TYPE_WIMAX: switch is on a WiMAX device.
* @RFKILL_TYPE_WWAN: switch is on a wireless WAN device.
* @RFKILL_TYPE_GPS: switch is on a GPS device.
* @RFKILL_TYPE_FM: switch is on a FM radio device.
* @NUM_RFKILL_TYPES: number of defined rfkill types
*/
enum rfkill_type {
RFKILL_TYPE_ALL = 0,
RFKILL_TYPE_WLAN,
RFKILL_TYPE_BLUETOOTH,
RFKILL_TYPE_UWB,
RFKILL_TYPE_WIMAX,
RFKILL_TYPE_WWAN,
RFKILL_TYPE_GPS,
RFKILL_TYPE_FM,
NUM_RFKILL_TYPES,
};
/**
* enum rfkill_operation - operation types
* @RFKILL_OP_ADD: a device was added
* @RFKILL_OP_DEL: a device was removed
* @RFKILL_OP_CHANGE: a device's state changed -- userspace changes one device
* @RFKILL_OP_CHANGE_ALL: userspace changes all devices (of a type, or all)
*/
enum rfkill_operation {
RFKILL_OP_ADD = 0,
RFKILL_OP_DEL,
RFKILL_OP_CHANGE,
RFKILL_OP_CHANGE_ALL,
};
/**
* struct rfkill_event - events for userspace on /dev/rfkill
* @idx: index of dev rfkill
* @type: type of the rfkill struct
* @op: operation code
* @hard: hard state (0/1)
* @soft: soft state (0/1)
*
* Structure used for userspace communication on /dev/rfkill,
* used for events from the kernel and control to the kernel.
*/
struct rfkill_event {
__u32 idx;
__u8 type;
__u8 op;
__u8 soft, hard;
} __attribute__((packed));
/*
* We are planning to be backward and forward compatible with changes
* to the event struct, by adding new, optional, members at the end.
* When reading an event (whether the kernel from userspace or vice
* versa) we need to accept anything that's at least as large as the
* version 1 event size, but might be able to accept other sizes in
* the future.
*
* One exception is the kernel -- we already have two event sizes in
* that we've made the 'hard' member optional since our only option
* is to ignore it anyway.
*/
#define RFKILL_EVENT_SIZE_V1 8
/* ioctl for turning off rfkill-input (if present) */
#define RFKILL_IOC_MAGIC 'R'
#define RFKILL_IOC_NOINPUT 1
#define RFKILL_IOCTL_NOINPUT _IO(RFKILL_IOC_MAGIC, RFKILL_IOC_NOINPUT)
/* and that's all userspace gets */
#ifdef __KERNEL__
/* don't allow anyone to use these in the kernel */
enum rfkill_user_states {
RFKILL_USER_STATE_SOFT_BLOCKED = RFKILL_STATE_SOFT_BLOCKED,
RFKILL_USER_STATE_UNBLOCKED = RFKILL_STATE_UNBLOCKED,
RFKILL_USER_STATE_HARD_BLOCKED = RFKILL_STATE_HARD_BLOCKED,
};
#undef RFKILL_STATE_SOFT_BLOCKED
#undef RFKILL_STATE_UNBLOCKED
#undef RFKILL_STATE_HARD_BLOCKED
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/leds.h>
#include <linux/err.h>
/* this is opaque */
struct rfkill;
/**
* struct rfkill_ops - rfkill driver methods
*
* @poll: poll the rfkill block state(s) -- only assign this method
* when you need polling. When called, simply call one of the
* rfkill_set{,_hw,_sw}_state family of functions. If the hw
* is getting unblocked you need to take into account the return
* value of those functions to make sure the software block is
* properly used.
* @query: query the rfkill block state(s) and call exactly one of the
* rfkill_set{,_hw,_sw}_state family of functions. Assign this
* method if input events can cause hardware state changes to make
* the rfkill core query your driver before setting a requested
* block.
* @set_block: turn the transmitter on (blocked == false) or off
* (blocked == true) -- ignore and return 0 when hard blocked.
* This callback must be assigned.
*/
struct rfkill_ops {
void (*poll)(struct rfkill *rfkill, void *data);
void (*query)(struct rfkill *rfkill, void *data);
int (*set_block)(void *data, bool blocked);
};
#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
/**
* rfkill_alloc - allocate rfkill structure
* @name: name of the struct -- the string is not copied internally
* : device that has rf switch on it
* @type: type of the switch (RFKILL_TYPE_*)
* @ops: rfkill methods
* @ops_data: data passed to each method
*
* This function should be called by the transmitter driver to allocate an
* rfkill structure. Returns %NULL on failure.
*/
struct rfkill * __must_check rfkill_alloc(const char *name,
struct device *parent,
const enum rfkill_type type,
const struct rfkill_ops *ops,
void *ops_data);
/**
* rfkill_register - Register a rfkill structure.
* @rfkill: rfkill structure to be registered
*
* This function should be called by the transmitter driver to register
* the rfkill structure. Before calling this function the driver needs
* to be ready to service method calls from rfkill.
*
* If rfkill_init_sw_state() is not called before registration,
* set_block() will be called to initialize the software blocked state
* to a default value.
*
* If the hardware blocked state is not set before registration,
* it is assumed to be unblocked.
*/
int __must_check rfkill_register(struct rfkill *rfkill);
/**
* rfkill_pause_polling(struct rfkill *rfkill)
*
* Pause polling -- say transmitter is off for other reasons.
* NOTE: not necessary for suspend/resume -- in that case the
* core stops polling anyway
*/
void rfkill_pause_polling(struct rfkill *rfkill);
/**
* rfkill_resume_polling(struct rfkill *rfkill)
*
* Pause polling -- say transmitter is off for other reasons.
* NOTE: not necessary for suspend/resume -- in that case the
* core stops polling anyway
*/
void rfkill_resume_polling(struct rfkill *rfkill);
/**
* rfkill_unregister - Unregister a rfkill structure.
* @rfkill: rfkill structure to be unregistered
*
* This function should be called by the network driver during device
* teardown to destroy rfkill structure. Until it returns, the driver
* needs to be able to service method calls.
*/
void rfkill_unregister(struct rfkill *rfkill);
/**
* rfkill_destroy - free rfkill structure
* @rfkill: rfkill structure to be destroyed
*
* Destroys the rfkill structure.
*/
void rfkill_destroy(struct rfkill *rfkill);
/**
* rfkill_set_hw_state - Set the internal rfkill hardware block state
* @rfkill: pointer to the rfkill class to modify.
* @state: the current hardware block state to set
*
* rfkill drivers that get events when the hard-blocked state changes
* use this function to notify the rfkill core (and through that also
* userspace) of the current state. They should also use this after
* resume if the state could have changed.
*
* You need not (but may) call this function if poll_state is assigned.
*
* This function can be called in any context, even from within rfkill
* callbacks.
*
* The function returns the combined block state (true if transmitter
* should be blocked) so that drivers need not keep track of the soft
* block state -- which they might not be able to.
*/
bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked);
/**
* rfkill_set_sw_state - Set the internal rfkill software block state
* @rfkill: pointer to the rfkill class to modify.
* @state: the current software block state to set
*
* rfkill drivers that get events when the soft-blocked state changes
* (yes, some platforms directly act on input but allow changing again)
* use this function to notify the rfkill core (and through that also
* userspace) of the current state.
*
* Drivers should also call this function after resume if the state has
* been changed by the user. This only makes sense for "persistent"
* devices (see rfkill_init_sw_state()).
*
* This function can be called in any context, even from within rfkill
* callbacks.
*
* The function returns the combined block state (true if transmitter
* should be blocked).
*/
bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
/**
* rfkill_init_sw_state - Initialize persistent software block state
* @rfkill: pointer to the rfkill class to modify.
* @state: the current software block state to set
*
* rfkill drivers that preserve their software block state over power off
* use this function to notify the rfkill core (and through that also
* userspace) of their initial state. It should only be used before
* registration.
*
* In addition, it marks the device as "persistent", an attribute which
* can be read by userspace. Persistent devices are expected to preserve
* their own state when suspended.
*/
void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked);
/**
* rfkill_set_states - Set the internal rfkill block states
* @rfkill: pointer to the rfkill class to modify.
* @sw: the current software block state to set
* @hw: the current hardware block state to set
*
* This function can be called in any context, even from within rfkill
* callbacks.
*/
void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
/**
* rfkill_blocked - query rfkill block
*
* @rfkill: rfkill struct to query
*/
bool rfkill_blocked(struct rfkill *rfkill);
#else /* !RFKILL */
static inline struct rfkill * __must_check
rfkill_alloc(const char *name,
struct device *parent,
const enum rfkill_type type,
const struct rfkill_ops *ops,
void *ops_data)
{
return ERR_PTR(-ENODEV);
}
static inline int __must_check rfkill_register(struct rfkill *rfkill)
{
if (rfkill == ERR_PTR(-ENODEV))
return 0;
return -EINVAL;
}
static inline void rfkill_pause_polling(struct rfkill *rfkill)
{
}
static inline void rfkill_resume_polling(struct rfkill *rfkill)
{
}
static inline void rfkill_unregister(struct rfkill *rfkill)
{
}
static inline void rfkill_destroy(struct rfkill *rfkill)
{
}
static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
{
return blocked;
}
static inline bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
{
return blocked;
}
static inline void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
{
}
static inline void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
{
}
static inline bool rfkill_blocked(struct rfkill *rfkill)
{
return false;
}
#endif /* RFKILL || RFKILL_MODULE */
#endif /* __KERNEL__ */
#endif /* RFKILL_H */