include/linux/rfkill.h

   1 #ifndef __RFKILL_H
   2 #define __RFKILL_H
   3
   4 /*
   5  * Copyright (C) 2006 - 2007 Ivo van Doorn
   6  * Copyright (C) 2007 Dmitry Torokhov
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the
  20  * Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23
  24 #include <linux/types.h>
  25 #include <linux/kernel.h>
  26 #include <linux/list.h>
  27 #include <linux/mutex.h>
  28 #include <linux/device.h>
  29 #include <linux/leds.h>
  30
  31 /**
  32  * enum rfkill_type - type of rfkill switch.
  33  * RFKILL_TYPE_WLAN: switch is on a 802.11 wireless network device.
  34  * RFKILL_TYPE_BLUETOOTH: switch is on a bluetooth device.
  35  * RFKILL_TYPE_UWB: switch is on a ultra wideband device.
  36  * RFKILL_TYPE_WIMAX: switch is on a WiMAX device.
  37  * RFKILL_TYPE_WWAN: switch is on a wireless WAN device.
  38  */
  39 enum rfkill_type {
  40         RFKILL_TYPE_WLAN ,
  41         RFKILL_TYPE_BLUETOOTH,
  42         RFKILL_TYPE_UWB,
  43         RFKILL_TYPE_WIMAX,
  44         RFKILL_TYPE_WWAN,
  45         RFKILL_TYPE_MAX,
  46 };
  47
  48 enum rfkill_state {
  49         RFKILL_STATE_OFF        = 0,    /* Radio output blocked */
  50         RFKILL_STATE_ON         = 1,    /* Radio output active */
  51 };
  52
  53 /**
  54  * struct rfkill - rfkill control structure.
  55  * @name: Name of the switch.
  56  * @type: Radio type which the button controls, the value stored
  57  *      here should be a value from enum rfkill_type.
  58  * @state: State of the switch, "ON" means radio can operate.
  59  * @user_claim_unsupported: Whether the hardware supports exclusive
  60  *      RF-kill control by userspace. Set this before registering.
  61  * @user_claim: Set when the switch is controlled exlusively by userspace.
  62  * @mutex: Guards switch state transitions
  63  * @data: Pointer to the RF button drivers private data which will be
  64  *      passed along when toggling radio state.
  65  * @toggle_radio(): Mandatory handler to control state of the radio.
  66  * @get_state(): handler to read current radio state from hardware,
  67  *      may be called from atomic context, should return 0 on success.
  68  * @led_trigger: A LED trigger for this button's LED.
  69  * @dev: Device structure integrating the switch into device tree.
  70  * @node: Used to place switch into list of all switches known to the
  71  *      the system.
  72  *
  73  * This structure represents a RF switch located on a network device.
  74  */
  75 struct rfkill {
  76         const char *name;
  77         enum rfkill_type type;
  78
  79         enum rfkill_state state;
  80         bool user_claim_unsupported;
  81         bool user_claim;
  82
  83         struct mutex mutex;
  84
  85         void *data;
  86         int (*toggle_radio)(void *data, enum rfkill_state state);
  87         int (*get_state)(void *data, enum rfkill_state *state);
  88
  89 #ifdef CONFIG_RFKILL_LEDS
  90         struct led_trigger led_trigger;
  91 #endif
  92
  93         struct device dev;
  94         struct list_head node;
  95 };
  96 #define to_rfkill(d)    container_of(d, struct rfkill, dev)
  97
  98 struct rfkill *rfkill_allocate(struct device *parent, enum rfkill_type type);
  99 void rfkill_free(struct rfkill *rfkill);
 100 int rfkill_register(struct rfkill *rfkill);
 101 void rfkill_unregister(struct rfkill *rfkill);
 102
 103 int rfkill_force_state(struct rfkill *rfkill, enum rfkill_state state);
 104
 105 /**
 106  * rfkill_get_led_name - Get the LED trigger name for the button's LED.
 107  * This function might return a NULL pointer if registering of the
 108  * LED trigger failed.
 109  * Use this as "default_trigger" for the LED.
 110  */
 111 static inline char *rfkill_get_led_name(struct rfkill *rfkill)
 112 {
 113 #ifdef CONFIG_RFKILL_LEDS
 114         return (char *)(rfkill->led_trigger.name);
 115 #else
 116         return NULL;
 117 #endif
 118 }
 119
 120 /* rfkill notification chain */
 121 #define RFKILL_STATE_CHANGED            0x0001  /* state of a normal rfkill
 122                                                    switch has changed */
 123
 124 int register_rfkill_notifier(struct notifier_block *nb);
 125 int unregister_rfkill_notifier(struct notifier_block *nb);
 126
 127 #endif /* RFKILL_H */