355 lines
11 KiB
C
355 lines
11 KiB
C
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/*
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* Copyright (C) 2006 - 2007 Ivo van Doorn
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* Copyright (C) 2007 Dmitry Torokhov
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* Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef __RFKILL_H
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#define __RFKILL_H
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#include <uapi/linux/rfkill.h>
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/* don't allow anyone to use these in the kernel */
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enum rfkill_user_states {
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RFKILL_USER_STATE_SOFT_BLOCKED = RFKILL_STATE_SOFT_BLOCKED,
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RFKILL_USER_STATE_UNBLOCKED = RFKILL_STATE_UNBLOCKED,
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RFKILL_USER_STATE_HARD_BLOCKED = RFKILL_STATE_HARD_BLOCKED,
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};
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#undef RFKILL_STATE_SOFT_BLOCKED
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#undef RFKILL_STATE_UNBLOCKED
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#undef RFKILL_STATE_HARD_BLOCKED
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/mutex.h>
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#include <linux/leds.h>
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#include <linux/err.h>
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struct device;
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/* this is opaque */
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struct rfkill;
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/**
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* struct rfkill_ops - rfkill driver methods
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*
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* @poll: poll the rfkill block state(s) -- only assign this method
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* when you need polling. When called, simply call one of the
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* rfkill_set{,_hw,_sw}_state family of functions. If the hw
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* is getting unblocked you need to take into account the return
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* value of those functions to make sure the software block is
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* properly used.
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* @query: query the rfkill block state(s) and call exactly one of the
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* rfkill_set{,_hw,_sw}_state family of functions. Assign this
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* method if input events can cause hardware state changes to make
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* the rfkill core query your driver before setting a requested
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* block.
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* @set_block: turn the transmitter on (blocked == false) or off
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* (blocked == true) -- ignore and return 0 when hard blocked.
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* This callback must be assigned.
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*/
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struct rfkill_ops {
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void (*poll)(struct rfkill *rfkill, void *data);
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void (*query)(struct rfkill *rfkill, void *data);
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int (*set_block)(void *data, bool blocked);
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};
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#if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
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/**
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* rfkill_alloc - Allocate rfkill structure
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* @name: name of the struct -- the string is not copied internally
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* @parent: device that has rf switch on it
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* @type: type of the switch (RFKILL_TYPE_*)
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* @ops: rfkill methods
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* @ops_data: data passed to each method
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*
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* This function should be called by the transmitter driver to allocate an
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* rfkill structure. Returns %NULL on failure.
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*/
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struct rfkill * __must_check rfkill_alloc(const char *name,
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struct device *parent,
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const enum rfkill_type type,
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const struct rfkill_ops *ops,
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void *ops_data);
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/**
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* rfkill_register - Register a rfkill structure.
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* @rfkill: rfkill structure to be registered
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*
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* This function should be called by the transmitter driver to register
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* the rfkill structure. Before calling this function the driver needs
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* to be ready to service method calls from rfkill.
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*
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* If rfkill_init_sw_state() is not called before registration,
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* set_block() will be called to initialize the software blocked state
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* to a default value.
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*
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* If the hardware blocked state is not set before registration,
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* it is assumed to be unblocked.
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*/
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int __must_check rfkill_register(struct rfkill *rfkill);
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/**
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* rfkill_pause_polling(struct rfkill *rfkill)
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*
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* Pause polling -- say transmitter is off for other reasons.
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* NOTE: not necessary for suspend/resume -- in that case the
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* core stops polling anyway (but will also correctly handle
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* the case of polling having been paused before suspend.)
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*/
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void rfkill_pause_polling(struct rfkill *rfkill);
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/**
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* rfkill_resume_polling(struct rfkill *rfkill)
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*
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* Resume polling
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* NOTE: not necessary for suspend/resume -- in that case the
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* core stops polling anyway
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*/
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void rfkill_resume_polling(struct rfkill *rfkill);
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/**
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* rfkill_unregister - Unregister a rfkill structure.
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* @rfkill: rfkill structure to be unregistered
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*
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* This function should be called by the network driver during device
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* teardown to destroy rfkill structure. Until it returns, the driver
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* needs to be able to service method calls.
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*/
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void rfkill_unregister(struct rfkill *rfkill);
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/**
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* rfkill_destroy - Free rfkill structure
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* @rfkill: rfkill structure to be destroyed
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*
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* Destroys the rfkill structure.
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*/
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void rfkill_destroy(struct rfkill *rfkill);
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/**
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* rfkill_set_hw_state_reason - Set the internal rfkill hardware block state
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* with a reason
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* @rfkill: pointer to the rfkill class to modify.
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* @blocked: the current hardware block state to set
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* @reason: one of &enum rfkill_hard_block_reasons
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*
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* Prefer to use rfkill_set_hw_state if you don't need any special reason.
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*/
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bool rfkill_set_hw_state_reason(struct rfkill *rfkill,
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bool blocked, unsigned long reason);
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/**
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* rfkill_set_hw_state - Set the internal rfkill hardware block state
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* @rfkill: pointer to the rfkill class to modify.
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* @blocked: the current hardware block state to set
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*
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* rfkill drivers that get events when the hard-blocked state changes
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* use this function to notify the rfkill core (and through that also
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* userspace) of the current state. They should also use this after
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* resume if the state could have changed.
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*
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* You need not (but may) call this function if poll_state is assigned.
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*
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* This function can be called in any context, even from within rfkill
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* callbacks.
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*
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* The function returns the combined block state (true if transmitter
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* should be blocked) so that drivers need not keep track of the soft
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* block state -- which they might not be able to.
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*/
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static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
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{
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return rfkill_set_hw_state_reason(rfkill, blocked,
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RFKILL_HARD_BLOCK_SIGNAL);
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}
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/**
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* rfkill_set_sw_state - Set the internal rfkill software block state
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* @rfkill: pointer to the rfkill class to modify.
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* @blocked: the current software block state to set
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*
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* rfkill drivers that get events when the soft-blocked state changes
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* (yes, some platforms directly act on input but allow changing again)
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* use this function to notify the rfkill core (and through that also
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* userspace) of the current state.
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*
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* Drivers should also call this function after resume if the state has
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* been changed by the user. This only makes sense for "persistent"
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* devices (see rfkill_init_sw_state()).
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*
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* This function can be called in any context, even from within rfkill
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* callbacks.
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*
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* The function returns the combined block state (true if transmitter
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* should be blocked).
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*/
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bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
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/**
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* rfkill_init_sw_state - Initialize persistent software block state
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* @rfkill: pointer to the rfkill class to modify.
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* @blocked: the current software block state to set
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*
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* rfkill drivers that preserve their software block state over power off
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* use this function to notify the rfkill core (and through that also
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* userspace) of their initial state. It should only be used before
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* registration.
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*
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* In addition, it marks the device as "persistent", an attribute which
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* can be read by userspace. Persistent devices are expected to preserve
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* their own state when suspended.
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*/
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void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked);
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/**
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* rfkill_set_states - Set the internal rfkill block states
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* @rfkill: pointer to the rfkill class to modify.
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* @sw: the current software block state to set
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* @hw: the current hardware block state to set
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*
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* This function can be called in any context, even from within rfkill
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* callbacks.
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*/
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void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
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/**
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* rfkill_blocked - Query rfkill block state
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*
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* @rfkill: rfkill struct to query
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*/
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bool rfkill_blocked(struct rfkill *rfkill);
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/**
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* rfkill_soft_blocked - Query soft rfkill block state
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*
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* @rfkill: rfkill struct to query
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*/
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bool rfkill_soft_blocked(struct rfkill *rfkill);
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/**
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* rfkill_find_type - Helper for finding rfkill type by name
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* @name: the name of the type
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*
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* Returns enum rfkill_type that corresponds to the name.
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*/
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enum rfkill_type rfkill_find_type(const char *name);
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#else /* !RFKILL */
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static inline struct rfkill * __must_check
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rfkill_alloc(const char *name,
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struct device *parent,
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const enum rfkill_type type,
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const struct rfkill_ops *ops,
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void *ops_data)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline int __must_check rfkill_register(struct rfkill *rfkill)
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{
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if (rfkill == ERR_PTR(-ENODEV))
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return 0;
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return -EINVAL;
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}
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static inline void rfkill_pause_polling(struct rfkill *rfkill)
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{
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}
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static inline void rfkill_resume_polling(struct rfkill *rfkill)
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{
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}
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static inline void rfkill_unregister(struct rfkill *rfkill)
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{
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}
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static inline void rfkill_destroy(struct rfkill *rfkill)
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{
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}
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static inline bool rfkill_set_hw_state_reason(struct rfkill *rfkill,
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bool blocked,
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unsigned long reason)
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{
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return blocked;
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}
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static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
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{
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return blocked;
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}
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static inline bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
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{
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return blocked;
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}
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static inline void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
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{
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}
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static inline void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
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{
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}
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static inline bool rfkill_blocked(struct rfkill *rfkill)
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{
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return false;
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}
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static inline bool rfkill_soft_blocked(struct rfkill *rfkill)
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{
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return false;
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}
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static inline enum rfkill_type rfkill_find_type(const char *name)
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{
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return RFKILL_TYPE_ALL;
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}
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#endif /* RFKILL || RFKILL_MODULE */
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#ifdef CONFIG_RFKILL_LEDS
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/**
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* rfkill_get_led_trigger_name - Get the LED trigger name for the button's LED.
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* This function might return a NULL pointer if registering of the
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* LED trigger failed. Use this as "default_trigger" for the LED.
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*/
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const char *rfkill_get_led_trigger_name(struct rfkill *rfkill);
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/**
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* rfkill_set_led_trigger_name - Set the LED trigger name
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* @rfkill: rfkill struct
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* @name: LED trigger name
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*
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* This function sets the LED trigger name of the radio LED
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* trigger that rfkill creates. It is optional, but if called
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* must be called before rfkill_register() to be effective.
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*/
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void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name);
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#else
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static inline const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
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{
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return NULL;
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}
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static inline void
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rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
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{
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}
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#endif
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#endif /* RFKILL_H */
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