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/types.h>
103 #include <linux/kernel.h>
104 #include <linux/list.h>
105 #include <linux/mutex.h>
106 #include <linux/device.h>
107 #include <linux/leds.h>
108 #include <linux/err.h>
114 * struct rfkill_ops - rfkill driver methods
116 * @poll: poll the rfkill block state(s) -- only assign this method
117 * when you need polling. When called, simply call one of the
118 * rfkill_set{,_hw,_sw}_state family of functions. If the hw
119 * is getting unblocked you need to take into account the return
120 * value of those functions to make sure the software block is
122 * @query: query the rfkill block state(s) and call exactly one of the
123 * rfkill_set{,_hw,_sw}_state family of functions. Assign this
124 * method if input events can cause hardware state changes to make
125 * the rfkill core query your driver before setting a requested
127 * @set_block: turn the transmitter on (blocked == false) or off
128 * (blocked == true) -- ignore and return 0 when hard blocked.
129 * This callback must be assigned.
132 void (*poll)(struct rfkill *rfkill, void *data);
133 void (*query)(struct rfkill *rfkill, void *data);
134 int (*set_block)(void *data, bool blocked);
137 #if defined(CONFIG_RFKILL) || defined(CONFIG_RFKILL_MODULE)
139 * rfkill_alloc - allocate rfkill structure
140 * @name: name of the struct -- the string is not copied internally
141 * @parent: device that has rf switch on it
142 * @type: type of the switch (RFKILL_TYPE_*)
143 * @ops: rfkill methods
144 * @ops_data: data passed to each method
146 * This function should be called by the transmitter driver to allocate an
147 * rfkill structure. Returns %NULL on failure.
149 struct rfkill * __must_check rfkill_alloc(const char *name,
150 struct device *parent,
151 const enum rfkill_type type,
152 const struct rfkill_ops *ops,
156 * rfkill_register - Register a rfkill structure.
157 * @rfkill: rfkill structure to be registered
159 * This function should be called by the transmitter driver to register
160 * the rfkill structure. Before calling this function the driver needs
161 * to be ready to service method calls from rfkill.
163 * If rfkill_init_sw_state() is not called before registration,
164 * set_block() will be called to initialize the software blocked state
165 * to a default value.
167 * If the hardware blocked state is not set before registration,
168 * it is assumed to be unblocked.
170 int __must_check rfkill_register(struct rfkill *rfkill);
173 * rfkill_pause_polling(struct rfkill *rfkill)
175 * Pause polling -- say transmitter is off for other reasons.
176 * NOTE: not necessary for suspend/resume -- in that case the
177 * core stops polling anyway
179 void rfkill_pause_polling(struct rfkill *rfkill);
182 * rfkill_resume_polling(struct rfkill *rfkill)
184 * Pause polling -- say transmitter is off for other reasons.
185 * NOTE: not necessary for suspend/resume -- in that case the
186 * core stops polling anyway
188 void rfkill_resume_polling(struct rfkill *rfkill);
192 * rfkill_unregister - Unregister a rfkill structure.
193 * @rfkill: rfkill structure to be unregistered
195 * This function should be called by the network driver during device
196 * teardown to destroy rfkill structure. Until it returns, the driver
197 * needs to be able to service method calls.
199 void rfkill_unregister(struct rfkill *rfkill);
202 * rfkill_destroy - free rfkill structure
203 * @rfkill: rfkill structure to be destroyed
205 * Destroys the rfkill structure.
207 void rfkill_destroy(struct rfkill *rfkill);
210 * rfkill_set_hw_state - Set the internal rfkill hardware block state
211 * @rfkill: pointer to the rfkill class to modify.
212 * @state: the current hardware block state to set
214 * rfkill drivers that get events when the hard-blocked state changes
215 * use this function to notify the rfkill core (and through that also
216 * userspace) of the current state. They should also use this after
217 * resume if the state could have changed.
219 * You need not (but may) call this function if poll_state is assigned.
221 * This function can be called in any context, even from within rfkill
224 * The function returns the combined block state (true if transmitter
225 * should be blocked) so that drivers need not keep track of the soft
226 * block state -- which they might not be able to.
228 bool __must_check rfkill_set_hw_state(struct rfkill *rfkill, bool blocked);
231 * rfkill_set_sw_state - Set the internal rfkill software block state
232 * @rfkill: pointer to the rfkill class to modify.
233 * @state: the current software block state to set
235 * rfkill drivers that get events when the soft-blocked state changes
236 * (yes, some platforms directly act on input but allow changing again)
237 * use this function to notify the rfkill core (and through that also
238 * userspace) of the current state.
240 * Drivers should also call this function after resume if the state has
241 * been changed by the user. This only makes sense for "persistent"
242 * devices (see rfkill_init_sw_state()).
244 * This function can be called in any context, even from within rfkill
247 * The function returns the combined block state (true if transmitter
248 * should be blocked).
250 bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked);
253 * rfkill_init_sw_state - Initialize persistent software block state
254 * @rfkill: pointer to the rfkill class to modify.
255 * @state: the current software block state to set
257 * rfkill drivers that preserve their software block state over power off
258 * use this function to notify the rfkill core (and through that also
259 * userspace) of their initial state. It should only be used before
262 * In addition, it marks the device as "persistent", an attribute which
263 * can be read by userspace. Persistent devices are expected to preserve
264 * their own state when suspended.
266 void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked);
269 * rfkill_set_states - Set the internal rfkill block states
270 * @rfkill: pointer to the rfkill class to modify.
271 * @sw: the current software block state to set
272 * @hw: the current hardware block state to set
274 * This function can be called in any context, even from within rfkill
277 void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw);
280 * rfkill_blocked - query rfkill block
282 * @rfkill: rfkill struct to query
284 bool rfkill_blocked(struct rfkill *rfkill);
286 static inline struct rfkill * __must_check
287 rfkill_alloc(const char *name,
288 struct device *parent,
289 const enum rfkill_type type,
290 const struct rfkill_ops *ops,
293 return ERR_PTR(-ENODEV);
296 static inline int __must_check rfkill_register(struct rfkill *rfkill)
298 if (rfkill == ERR_PTR(-ENODEV))
303 static inline void rfkill_pause_polling(struct rfkill *rfkill)
307 static inline void rfkill_resume_polling(struct rfkill *rfkill)
311 static inline void rfkill_unregister(struct rfkill *rfkill)
315 static inline void rfkill_destroy(struct rfkill *rfkill)
319 static inline bool rfkill_set_hw_state(struct rfkill *rfkill, bool blocked)
324 static inline bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked)
329 static inline void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked)
333 static inline void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw)
337 static inline bool rfkill_blocked(struct rfkill *rfkill)
341 #endif /* RFKILL || RFKILL_MODULE */
344 #ifdef CONFIG_RFKILL_LEDS
346 * rfkill_get_led_trigger_name - Get the LED trigger name for the button's LED.
347 * This function might return a NULL pointer if registering of the
348 * LED trigger failed. Use this as "default_trigger" for the LED.
350 const char *rfkill_get_led_trigger_name(struct rfkill *rfkill);
353 * rfkill_set_led_trigger_name -- set the LED trigger name
354 * @rfkill: rfkill struct
355 * @name: LED trigger name
357 * This function sets the LED trigger name of the radio LED
358 * trigger that rfkill creates. It is optional, but if called
359 * must be called before rfkill_register() to be effective.
361 void rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name);
363 static inline const char *rfkill_get_led_trigger_name(struct rfkill *rfkill)
369 rfkill_set_led_trigger_name(struct rfkill *rfkill, const char *name)
374 #endif /* __KERNEL__ */
376 #endif /* RFKILL_H */