#ifndef __RFKILL_H #define __RFKILL_H /* * Copyright (C) 2006 - 2007 Ivo van Doorn * Copyright (C) 2007 Dmitry Torokhov * Copyright 2009 Johannes Berg * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the * Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include /* define userspace visible states */ #define RFKILL_STATE_SOFT_BLOCKED 0 #define RFKILL_STATE_UNBLOCKED 1 #define RFKILL_STATE_HARD_BLOCKED 2 /** * enum rfkill_type - type of rfkill switch. * * @RFKILL_TYPE_ALL: toggles all switches (userspace only) * @RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device. * @RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device. * @RFKILL_TYPE_UWB: switch is on a ultra wideband device. * @RFKILL_TYPE_WIMAX: switch is on a WiMAX device. * @RFKILL_TYPE_WWAN: switch is on a wireless WAN device. * @NUM_RFKILL_TYPES: number of defined rfkill types */ enum rfkill_type { RFKILL_TYPE_ALL = 0, RFKILL_TYPE_WLAN, RFKILL_TYPE_BLUETOOTH, RFKILL_TYPE_UWB, RFKILL_TYPE_WIMAX, RFKILL_TYPE_WWAN, NUM_RFKILL_TYPES, }; /** * enum rfkill_operation - operation types * @RFKILL_OP_ADD: a device was added * @RFKILL_OP_DEL: a device was removed * @RFKILL_OP_CHANGE: a device's state changed -- userspace changes one device * @RFKILL_OP_CHANGE_ALL: userspace changes all devices (of a type, or all) */ enum rfkill_operation { RFKILL_OP_ADD = 0, RFKILL_OP_DEL, RFKILL_OP_CHANGE, RFKILL_OP_CHANGE_ALL, }; /** * struct rfkill_event - events for userspace on /dev/rfkill * @idx: index of dev rfkill * @type: type of the rfkill struct * @op: operation code * @hard: hard state (0/1) * @soft: soft state (0/1) * * Structure used for userspace communication on /dev/rfkill, * used for events from the kernel and control to the kernel. */ struct rfkill_event { __u32 idx; __u8 type; __u8 op; __u8 soft, hard; } __packed; /* * We are planning to be backward and forward compatible with changes * to the event struct, by adding new, optional, members at the end. * When reading an event (whether the kernel from userspace or vice * versa) we need to accept anything that's at least as large as the * version 1 event size, but might be able to accept other sizes in * the future. * * One exception is the kernel -- we already have two event sizes in * that we've made the 'hard' member optional since our only option * is to ignore it anyway. */ #define RFKILL_EVENT_SIZE_V1 8 /* ioctl for turning off rfkill-input (if present) */ #define RFKILL_IOC_MAGIC 'R' #define RFKILL_IOC_NOINPUT 1 #define RFKILL_IOCTL_NOINPUT _IO(RFKILL_IOC_MAGIC, RFKILL_IOC_NOINPUT) /* and that's all userspace gets */ #ifdef __KERNEL__ /* 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 #include #include #include #include #include /* 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 __must_check 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 /* __KERNEL__ */ #endif /* RFKILL_H */