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  */
  37 enum rfkill_type {
  38         RFKILL_TYPE_WLAN ,
  39         RFKILL_TYPE_BLUETOOTH,
  40         RFKILL_TYPE_UWB,
  41         RFKILL_TYPE_MAX,
  42 };
  43
  44 enum rfkill_state {
  45         RFKILL_STATE_OFF        = 0,
  46         RFKILL_STATE_ON         = 1,
  47 };
  48
  49 /**
  50  * struct rfkill - rfkill control structure.
  51  * @name: Name of the switch.
  52  * @type: Radio type which the button controls, the value stored
  53  *      here should be a value from enum rfkill_type.
  54  * @state: State of the switch (on/off).
  55  * @user_claim_unsupported: Whether the hardware supports exclusive
  56  *      RF-kill control by userspace. Set this before registering.
  57  * @user_claim: Set when the switch is controlled exlusively by userspace.
  58  * @mutex: Guards switch state transitions
  59  * @data: Pointer to the RF button drivers private data which will be
  60  *      passed along when toggling radio state.
  61  * @toggle_radio(): Mandatory handler to control state of the radio.
  62  * @led_trigger: A LED trigger for this button's LED.
  63  * @dev: Device structure integrating the switch into device tree.
  64  * @node: Used to place switch into list of all switches known to the
  65  *      the system.
  66  *
  67  * This structure represents a RF switch located on a network device.
  68  */
  69 struct rfkill {
  70         const char *name;
  71         enum rfkill_type type;
  72
  73         enum rfkill_state state;
  74         bool user_claim_unsupported;
  75         bool user_claim;
  76
  77         struct mutex mutex;
  78
  79         void *data;
  80         int (*toggle_radio)(void *data, enum rfkill_state state);
  81
  82 #ifdef CONFIG_RFKILL_LEDS
  83         struct led_trigger led_trigger;
  84 #endif
  85
  86         struct device dev;
  87         struct list_head node;
  88 };
  89 #define to_rfkill(d)    container_of(d, struct rfkill, dev)
  90
  91 struct rfkill *rfkill_allocate(struct device *parent, enum rfkill_type type);
  92 void rfkill_free(struct rfkill *rfkill);
  93 int rfkill_register(struct rfkill *rfkill);
  94 void rfkill_unregister(struct rfkill *rfkill);
  95
  96 /**
  97  * rfkill_get_led_name - Get the LED trigger name for the button's LED.
  98  * This function might return a NULL pointer if registering of the
  99  * LED trigger failed.
 100  * Use this as "default_trigger" for the LED.
 101  */
 102 static inline char *rfkill_get_led_name(struct rfkill *rfkill)
 103 {
 104 #ifdef CONFIG_RFKILL_LEDS
 105         return (char *)(rfkill->led_trigger.name);
 106 #else
 107         return NULL;
 108 #endif
 109 }
 110
 111 #endif /* RFKILL_H */