package/rt2x00/src/rt2x00rfkill.c

   1 /*
   2         Copyright (C) 2004 - 2007 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00lib
  23         Abstract: rt2x00 rfkill specific routines.
  24         Supported chipsets: RT2460, RT2560, rt2561, rt2561s, rt2661.
  25  */
  26
  27 /*
  28  * Set enviroment defines for rt2x00.h
  29  */
  30 #define DRV_NAME "rt2x00lib"
  31
  32 #include <linux/rfkill.h>
  33
  34 #include "rt2x00.h"
  35
  36 static int rt2x00lib_toggle_radio(void *data, enum rfkill_state state)
  37 {
  38         struct rt2x00_dev* rt2x00dev = data;
  39         int retval = 0;
  40
  41         if (unlikely(!rt2x00dev))
  42                 return 0;
  43
  44         /*
  45          * Only continue if we have an active interface,
  46          * either monitor or non-monitor should be present.
  47          */
  48         if (!is_interface_present(&rt2x00dev->interface) &&
  49             !is_monitor_present(&rt2x00dev->interface))
  50                 return 0;
  51
  52         if (state == RFKILL_STATE_ON) {
  53                 INFO(rt2x00dev, "Hardware button pressed, enabling radio.\n");
  54                 __set_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags);
  55                 retval = rt2x00lib_enable_radio(rt2x00dev);
  56         } else if (state == RFKILL_STATE_OFF) {
  57                 INFO(rt2x00dev, "Hardware button pressed, disabling radio.\n");
  58                 __clear_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags);
  59                 rt2x00lib_disable_radio(rt2x00dev);
  60         }
  61
  62         return retval;
  63 }
  64
  65 static void rt2x00lib_rfkill_poll(struct work_struct *work)
  66 {
  67         struct rt2x00_dev *rt2x00dev =
  68                 container_of(work, struct rt2x00_dev, rfkill_work.work);
  69
  70         rfkill_switch_all(rt2x00dev->rfkill->type,
  71                 rt2x00dev->ops->lib->rfkill_poll(rt2x00dev));
  72
  73         queue_delayed_work(rt2x00dev->workqueue, &rt2x00dev->rfkill_work,
  74                 RFKILL_POLL_INTERVAL);
  75 }
  76
  77 int rt2x00lib_register_rfkill(struct rt2x00_dev *rt2x00dev)
  78 {
  79         int status = rfkill_register(rt2x00dev->rfkill);
  80         if (status) {
  81                 ERROR(rt2x00dev, "Failed to register rfkill handler.\n");
  82                 return status;
  83         }
  84
  85         rt2x00lib_rfkill_poll(&rt2x00dev->rfkill_work.work);
  86
  87         return !schedule_delayed_work(&rt2x00dev->rfkill_work,
  88                 RFKILL_POLL_INTERVAL);
  89 }
  90
  91 void rt2x00lib_unregister_rfkill(struct rt2x00_dev *rt2x00dev)
  92 {
  93         if (delayed_work_pending(&rt2x00dev->rfkill_work))
  94                 cancel_rearming_delayed_workqueue(
  95                         rt2x00dev->workqueue, &rt2x00dev->rfkill_work);
  96
  97         rfkill_unregister(rt2x00dev->rfkill);
  98 }
  99
 100 int rt2x00lib_allocate_rfkill(struct rt2x00_dev *rt2x00dev)
 101 {
 102         struct rfkill *rfkill;
 103
 104         if (!test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 105                 return 0;
 106
 107         rfkill = rfkill_allocate(rt2x00dev->device, RFKILL_TYPE_WLAN);
 108         if (!rfkill) {
 109                 ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");
 110                 return -ENOMEM;
 111         }
 112
 113         rfkill->name = rt2x00dev->ops->name;
 114         rfkill->data = rt2x00dev;
 115         rfkill->toggle_radio = rt2x00lib_toggle_radio;
 116         rt2x00dev->rfkill = rfkill;
 117
 118         INIT_DELAYED_WORK(&rt2x00dev->rfkill_work, rt2x00lib_rfkill_poll);
 119
 120         return 0;
 121 }
 122
 123 void rt2x00lib_free_rfkill(struct rt2x00_dev *rt2x00dev)
 124 {
 125         if (!test_bit(DEVICE_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 126                 return;
 127
 128         rfkill_free(rt2x00dev->rfkill);
 129 }