2 * Copyright (C) 2006 - 2007 Ivo van Doorn
3 * Copyright (C) 2007 Dmitry Torokhov
4 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
6 * Permission to use, copy, modify, and/or distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <uapi/linux/rfkill.h>
23 /* don't allow anyone to use these in the kernel */
24 enum rfkill_user_states {
25 RFKILL_USER_STATE_SOFT_BLOCKED = RFKILL_STATE_SOFT_BLOCKED,
26 RFKILL_USER_STATE_UNBLOCKED = RFKILL_STATE_UNBLOCKED,
27 RFKILL_USER_STATE_HARD_BLOCKED = RFKILL_STATE_HARD_BLOCKED,
29 #undef RFKILL_STATE_SOFT_BLOCKED
30 #undef RFKILL_STATE_UNBLOCKED
31 #undef RFKILL_STATE_HARD_BLOCKED
33 #include <linux/kernel.h>
34 #include <linux/list.h>
35 #include <linux/mutex.h>
36 #include <linux/leds.h>
37 #include <linux/err.h>
44 * struct rfkill_ops - rfkill driver methods
46 * @poll: poll the rfkill block state(s) -- only assign this method
47 * when you need polling. When called, simply call one of the
48 * rfkill_set{,_hw,_sw}_state family of functions. If the hw
49 * is getting unblocked you need to take into account the return
50 * value of those functions to make sure the software block is
52 * @query: query the rfkill block state(s) and call exactly one of the
53 * rfkill_set{,_hw,_sw}_state family of functions. Assign this
54 * method if input events can cause hardware state changes to make
55 * the rfkill core query your driver before setting a requested
57 * @set_block: turn the transmitter on (blocked == false) or off
58 * (blocked == true) -- ignore and return 0 when hard blocked.
59 * This callback must be assigned.
62 void (*poll)(struct rfkill *rfkill, void *data);
63 void (*query)(struct rfkill *rfkill, void *data);
64 int (*set_block)(void *data, bool blocked);
67 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
69 * rfkill_alloc - Allocate rfkill structure
70 * @name: name of the struct -- the string is not copied internally
71 * @parent: device that has rf switch on it
72 * @type: type of the switch (RFKILL_TYPE_*)
73 * @ops: rfkill methods
74 * @ops_data: data passed to each method
76 * This function should be called by the transmitter driver to allocate an
77 * rfkill structure. Returns %NULL on failure.
79 struct rfkill * __must_check rfkill_alloc(const char *name,
80 struct device *parent,
81 const enum rfkill_type type,
82 const struct rfkill_ops *ops,
86 * rfkill_register - Register a rfkill structure.
87 * @rfkill: rfkill structure to be registered
89 * This function should be called by the transmitter driver to register
90 * the rfkill structure. Before calling this function the driver needs
91 * to be ready to service method calls from rfkill.
93 * If rfkill_init_sw_state() is not called before registration,
94 * set_block() will be called to initialize the software blocked state
97 * If the hardware blocked state is not set before registration,
98 * it is assumed to be unblocked.
100 int __must_check rfkill_register(struct rfkill *rfkill);
103 * rfkill_pause_polling(struct rfkill *rfkill)
105 * Pause polling -- say transmitter is off for other reasons.
106 * NOTE: not necessary for suspend/resume -- in that case the
107 * core stops polling anyway (but will also correctly handle
108 * the case of polling having been paused before suspend.)
110 void rfkill_pause_polling(struct rfkill *rfkill);
113 * rfkill_resume_polling(struct rfkill *rfkill)
116 * NOTE: not necessary for suspend/resume -- in that case the
117 * core stops polling anyway
119 void rfkill_resume_polling(struct rfkill *rfkill);
123 * rfkill_unregister - Unregister a rfkill structure.
124 * @rfkill: rfkill structure to be unregistered
126 * This function should be called by the network driver during device
127 * teardown to destroy rfkill structure. Until it returns, the driver
128 * needs to be able to service method calls.
130 void rfkill_unregister(struct rfkill *rfkill);
133 * rfkill_destroy - Free rfkill structure
134 * @rfkill: rfkill structure to be destroyed
136 * Destroys the rfkill structure.
138 void rfkill_destroy(struct rfkill *rfkill);
141 * rfkill_set_hw_state_reason - Set the internal rfkill hardware block state
143 * @rfkill: pointer to the rfkill class to modify.
144 * @blocked: the current hardware block state to set
145 * @reason: one of &enum rfkill_hard_block_reasons
147 * Prefer to use rfkill_set_hw_state if you don't need any special reason.
149 bool rfkill_set_hw_state_reason(struct rfkill *rfkill,
150 bool blocked, unsigned long reason);
152 * rfkill_set_hw_state - Set the internal rfkill hardware block state
153 * @rfkill: pointer to the rfkill class to modify.
154 * @blocked: the current hardware block state to set
156 * rfkill drivers that get events when the hard-blocked state changes
157 * use this function to notify the rfkill core (and through that also
158 * userspace) of the current state. They should also use this after
159 * resume if the state could have changed.
161 * You need not (but may) call this function if poll_state is assigned.
163 * This function can be called in any context, even from within rfkill
166 * The function returns the combined block state (true if transmitter
167 * should be blocked) so that drivers need not keep track of the soft
168 * block state -- which they might not be able to.
170 static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
172 return rfkill_set_hw_state_reason(rfkill, blocked,
173 RFKILL_HARD_BLOCK_SIGNAL);
177 * rfkill_set_sw_state - Set the internal rfkill software block state
178 * @rfkill: pointer to the rfkill class to modify.
179 * @blocked: the current software block state to set
181 * rfkill drivers that get events when the soft-blocked state changes
182 * (yes, some platforms directly act on input but allow changing again)
183 * use this function to notify the rfkill core (and through that also
184 * userspace) of the current state.
186 * Drivers should also call this function after resume if the state has
187 * been changed by the user. This only makes sense for "persistent"
188 * devices (see rfkill_init_sw_state()).
190 * This function can be called in any context, even from within rfkill
193 * The function returns the combined block state (true if transmitter
194 * should be blocked).
196 bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
199 * rfkill_init_sw_state - Initialize persistent software block state
200 * @rfkill: pointer to the rfkill class to modify.
201 * @blocked: the current software block state to set
203 * rfkill drivers that preserve their software block state over power off
204 * use this function to notify the rfkill core (and through that also
205 * userspace) of their initial state. It should only be used before
208 * In addition, it marks the device as "persistent", an attribute which
209 * can be read by userspace. Persistent devices are expected to preserve
210 * their own state when suspended.
212 void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked);
215 * rfkill_set_states - Set the internal rfkill block states
216 * @rfkill: pointer to the rfkill class to modify.
217 * @sw: the current software block state to set
218 * @hw: the current hardware block state to set
220 * This function can be called in any context, even from within rfkill
223 void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
226 * rfkill_blocked - Query rfkill block state
228 * @rfkill: rfkill struct to query
230 bool rfkill_blocked(struct rfkill *rfkill);
233 * rfkill_soft_blocked - Query soft rfkill block state
235 * @rfkill: rfkill struct to query
237 bool rfkill_soft_blocked(struct rfkill *rfkill);
240 * rfkill_find_type - Helper for finding rfkill type by name
241 * @name: the name of the type
243 * Returns enum rfkill_type that corresponds to the name.
245 enum rfkill_type rfkill_find_type(const char *name);
248 static inline struct rfkill * __must_check
249 rfkill_alloc(const char *name,
250 struct device *parent,
251 const enum rfkill_type type,
252 const struct rfkill_ops *ops,
255 return ERR_PTR(-ENODEV);
258 static inline int __must_check rfkill_register(struct rfkill *rfkill)
260 if (rfkill == ERR_PTR(-ENODEV))
265 static inline void rfkill_pause_polling(struct rfkill *rfkill)
269 static inline void rfkill_resume_polling(struct rfkill *rfkill)
273 static inline void rfkill_unregister(struct rfkill *rfkill)
277 static inline void rfkill_destroy(struct rfkill *rfkill)
281 static inline bool rfkill_set_hw_state_reason(struct rfkill *rfkill,
283 unsigned long reason)
288 static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
293 static inline bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
298 static inline void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
302 static inline void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
306 static inline bool rfkill_blocked(struct rfkill *rfkill)
311 static inline bool rfkill_soft_blocked(struct rfkill *rfkill)
316 static inline enum rfkill_type rfkill_find_type(const char *name)
318 return RFKILL_TYPE_ALL;
321 #endif /* RFKILL || RFKILL_MODULE */
324 #ifdef CONFIG_RFKILL_LEDS
326 * rfkill_get_led_trigger_name - Get the LED trigger name for the button's LED.
327 * This function might return a NULL pointer if registering of the
328 * LED trigger failed. Use this as "default_trigger" for the LED.
330 const char *rfkill_get_led_trigger_name(struct rfkill *rfkill);
333 * rfkill_set_led_trigger_name - Set the LED trigger name
334 * @rfkill: rfkill struct
335 * @name: LED trigger name
337 * This function sets the LED trigger name of the radio LED
338 * trigger that rfkill creates. It is optional, but if called
339 * must be called before rfkill_register() to be effective.
341 void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name);
343 static inline const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
349 rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
354 #endif /* RFKILL_H */