Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/linux/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.
*/
#ifndef __RFKILL_H
#define __RFKILL_H
#include <uapi/linux/rfkill.h>
/* 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/leds.h>
#include <linux/err.h>
struct device;
/* 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
* @parent: 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 */
#ifdef CONFIG_RFKILL_LEDS
/**
* rfkill_get_led_trigger_name - Get the LED trigger name for the button's LED.
* This function might return a NULL pointer if registering of the
* LED trigger failed. Use this as "default_trigger" for the LED.
*/
const char *rfkill_get_led_trigger_name(struct rfkill *rfkill);
/**
* rfkill_set_led_trigger_name -- set the LED trigger name
* @rfkill: rfkill struct
* @name: LED trigger name
*
* This function sets the LED trigger name of the radio LED
* trigger that rfkill creates. It is optional, but if called
* must be called before rfkill_register() to be effective.
*/
void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name);
#else
static inline const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
{
return NULL;
}
static inline void
rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
{
}
#endif
#endif /* RFKILL_H */
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