5 * Copyright (C) 2006 - 2007 Ivo van Doorn
6 * Copyright (C) 2007 Dmitry Torokhov
7 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the
21 * Free Software Foundation, Inc.,
22 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
25 #include <linux/types.h>
27 /* define userspace visible states */
28 #define RFKILL_STATE_SOFT_BLOCKED 0
29 #define RFKILL_STATE_UNBLOCKED 1
30 #define RFKILL_STATE_HARD_BLOCKED 2
33 * enum rfkill_type - type of rfkill switch.
35 * @RFKILL_TYPE_ALL: toggles all switches (userspace only)
36 * @RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device.
37 * @RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device.
38 * @RFKILL_TYPE_UWB: switch is on a ultra wideband device.
39 * @RFKILL_TYPE_WIMAX: switch is on a WiMAX device.
40 * @RFKILL_TYPE_WWAN: switch is on a wireless WAN device.
41 * @NUM_RFKILL_TYPES: number of defined rfkill types
46 RFKILL_TYPE_BLUETOOTH,
54 * enum rfkill_operation - operation types
55 * @RFKILL_OP_ADD: a device was added
56 * @RFKILL_OP_DEL: a device was removed
57 * @RFKILL_OP_CHANGE: a device's state changed -- userspace changes one device
58 * @RFKILL_OP_CHANGE_ALL: userspace changes all devices (of a type, or all)
60 enum rfkill_operation {
68 * struct rfkill_event - events for userspace on /dev/rfkill
69 * @idx: index of dev rfkill
70 * @type: type of the rfkill struct
72 * @hard: hard state (0/1)
73 * @soft: soft state (0/1)
75 * Structure used for userspace communication on /dev/rfkill,
76 * used for events from the kernel and control to the kernel.
85 /* ioctl for turning off rfkill-input (if present) */
86 #define RFKILL_IOC_MAGIC 'R'
87 #define RFKILL_IOC_NOINPUT 1
88 #define RFKILL_IOCTL_NOINPUT _IO(RFKILL_IOC_MAGIC, RFKILL_IOC_NOINPUT)
90 /* and that's all userspace gets */
92 /* don't allow anyone to use these in the kernel */
93 enum rfkill_user_states {
94 RFKILL_USER_STATE_SOFT_BLOCKED = RFKILL_STATE_SOFT_BLOCKED,
95 RFKILL_USER_STATE_UNBLOCKED = RFKILL_STATE_UNBLOCKED,
96 RFKILL_USER_STATE_HARD_BLOCKED = RFKILL_STATE_HARD_BLOCKED,
98 #undef RFKILL_STATE_SOFT_BLOCKED
99 #undef RFKILL_STATE_UNBLOCKED
100 #undef RFKILL_STATE_HARD_BLOCKED
102 #include <linux/kernel.h>
103 #include <linux/list.h>
104 #include <linux/mutex.h>
105 #include <linux/device.h>
106 #include <linux/leds.h>
107 #include <linux/err.h>
113 * struct rfkill_ops - rfkill driver methods
115 * @poll: poll the rfkill block state(s) -- only assign this method
116 * when you need polling. When called, simply call one of the
117 * rfkill_set{,_hw,_sw}_state family of functions. If the hw
118 * is getting unblocked you need to take into account the return
119 * value of those functions to make sure the software block is
121 * @query: query the rfkill block state(s) and call exactly one of the
122 * rfkill_set{,_hw,_sw}_state family of functions. Assign this
123 * method if input events can cause hardware state changes to make
124 * the rfkill core query your driver before setting a requested
126 * @set_block: turn the transmitter on (blocked == false) or off
127 * (blocked == true) -- ignore and return 0 when hard blocked.
128 * This callback must be assigned.
131 void (*poll)(struct rfkill *rfkill, void *data);
132 void (*query)(struct rfkill *rfkill, void *data);
133 int (*set_block)(void *data, bool blocked);
136 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
138 * rfkill_alloc - allocate rfkill structure
139 * @name: name of the struct -- the string is not copied internally
140 * @parent: device that has rf switch on it
141 * @type: type of the switch (RFKILL_TYPE_*)
142 * @ops: rfkill methods
143 * @ops_data: data passed to each method
145 * This function should be called by the transmitter driver to allocate an
146 * rfkill structure. Returns %NULL on failure.
148 struct rfkill * __must_check rfkill_alloc(const char *name,
149 struct device *parent,
150 const enum rfkill_type type,
151 const struct rfkill_ops *ops,
155 * rfkill_register - Register a rfkill structure.
156 * @rfkill: rfkill structure to be registered
158 * This function should be called by the transmitter driver to register
159 * the rfkill structure. Before calling this function the driver needs
160 * to be ready to service method calls from rfkill.
162 * If rfkill_init_sw_state() is not called before registration,
163 * set_block() will be called to initialize the software blocked state
164 * to a default value.
166 * If the hardware blocked state is not set before registration,
167 * it is assumed to be unblocked.
169 int __must_check rfkill_register(struct rfkill *rfkill);
172 * rfkill_pause_polling(struct rfkill *rfkill)
174 * Pause polling -- say transmitter is off for other reasons.
175 * NOTE: not necessary for suspend/resume -- in that case the
176 * core stops polling anyway
178 void rfkill_pause_polling(struct rfkill *rfkill);
181 * rfkill_resume_polling(struct rfkill *rfkill)
183 * Pause polling -- say transmitter is off for other reasons.
184 * NOTE: not necessary for suspend/resume -- in that case the
185 * core stops polling anyway
187 void rfkill_resume_polling(struct rfkill *rfkill);
191 * rfkill_unregister - Unregister a rfkill structure.
192 * @rfkill: rfkill structure to be unregistered
194 * This function should be called by the network driver during device
195 * teardown to destroy rfkill structure. Until it returns, the driver
196 * needs to be able to service method calls.
198 void rfkill_unregister(struct rfkill *rfkill);
201 * rfkill_destroy - free rfkill structure
202 * @rfkill: rfkill structure to be destroyed
204 * Destroys the rfkill structure.
206 void rfkill_destroy(struct rfkill *rfkill);
209 * rfkill_set_hw_state - Set the internal rfkill hardware block state
210 * @rfkill: pointer to the rfkill class to modify.
211 * @state: the current hardware block state to set
213 * rfkill drivers that get events when the hard-blocked state changes
214 * use this function to notify the rfkill core (and through that also
215 * userspace) of the current state. They should also use this after
216 * resume if the state could have changed.
218 * You need not (but may) call this function if poll_state is assigned.
220 * This function can be called in any context, even from within rfkill
223 * The function returns the combined block state (true if transmitter
224 * should be blocked) so that drivers need not keep track of the soft
225 * block state -- which they might not be able to.
227 bool __must_check rfkill_set_hw_state(struct rfkill *rfkill, bool blocked);
230 * rfkill_set_sw_state - Set the internal rfkill software block state
231 * @rfkill: pointer to the rfkill class to modify.
232 * @state: the current software block state to set
234 * rfkill drivers that get events when the soft-blocked state changes
235 * (yes, some platforms directly act on input but allow changing again)
236 * use this function to notify the rfkill core (and through that also
237 * userspace) of the current state.
239 * Drivers should also call this function after resume if the state has
240 * been changed by the user. This only makes sense for "persistent"
241 * devices (see rfkill_init_sw_state()).
243 * This function can be called in any context, even from within rfkill
246 * The function returns the combined block state (true if transmitter
247 * should be blocked).
249 bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
252 * rfkill_init_sw_state - Initialize persistent software block state
253 * @rfkill: pointer to the rfkill class to modify.
254 * @state: the current software block state to set
256 * rfkill drivers that preserve their software block state over power off
257 * use this function to notify the rfkill core (and through that also
258 * userspace) of their initial state. It should only be used before
261 * In addition, it marks the device as "persistent", an attribute which
262 * can be read by userspace. Persistent devices are expected to preserve
263 * their own state when suspended.
265 void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked);
268 * rfkill_set_states - Set the internal rfkill block states
269 * @rfkill: pointer to the rfkill class to modify.
270 * @sw: the current software block state to set
271 * @hw: the current hardware block state to set
273 * This function can be called in any context, even from within rfkill
276 void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
279 * rfkill_blocked - query rfkill block
281 * @rfkill: rfkill struct to query
283 bool rfkill_blocked(struct rfkill *rfkill);
285 static inline struct rfkill * __must_check
286 rfkill_alloc(const char *name,
287 struct device *parent,
288 const enum rfkill_type type,
289 const struct rfkill_ops *ops,
292 return ERR_PTR(-ENODEV);
295 static inline int __must_check rfkill_register(struct rfkill *rfkill)
297 if (rfkill == ERR_PTR(-ENODEV))
302 static inline void rfkill_pause_polling(struct rfkill *rfkill)
306 static inline void rfkill_resume_polling(struct rfkill *rfkill)
310 static inline void rfkill_unregister(struct rfkill *rfkill)
314 static inline void rfkill_destroy(struct rfkill *rfkill)
318 static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
323 static inline bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
328 static inline void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
332 static inline void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
336 static inline bool rfkill_blocked(struct rfkill *rfkill)
340 #endif /* RFKILL || RFKILL_MODULE */
343 #ifdef CONFIG_RFKILL_LEDS
345 * rfkill_get_led_trigger_name - Get the LED trigger name for the button's LED.
346 * This function might return a NULL pointer if registering of the
347 * LED trigger failed. Use this as "default_trigger" for the LED.
349 const char *rfkill_get_led_trigger_name(struct rfkill *rfkill);
352 * rfkill_set_led_trigger_name -- set the LED trigger name
353 * @rfkill: rfkill struct
354 * @name: LED trigger name
356 * This function sets the LED trigger name of the radio LED
357 * trigger that rfkill creates. It is optional, but if called
358 * must be called before rfkill_register() to be effective.
360 void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name);
362 static inline const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
368 rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
373 #endif /* __KERNEL__ */
375 #endif /* RFKILL_H */