drivers/net/wireless/rt2x00/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: rt2x00rfkill
  23         Abstract: rt2x00 rfkill routines.
  24  */
  25
  26 /*
  27  * Set enviroment defines for rt2x00.h
  28  */
  29 #define DRV_NAME "rt2x00lib"
  30
  31 #include <linux/input-polldev.h>
  32 #include <linux/kernel.h>
  33 #include <linux/module.h>
  34 #include <linux/rfkill.h>
  35
  36 #include "rt2x00.h"
  37 #include "rt2x00lib.h"
  38
  39 static int rt2x00rfkill_toggle_radio(void *data, enum rfkill_state state)
  40 {
  41         struct rt2x00_dev *rt2x00dev = data;
  42         int retval = 0;
  43
  44         if (unlikely(!rt2x00dev))
  45                 return 0;
  46
  47         /*
  48          * Only continue if there are enabled interfaces.
  49          */
  50         if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
  51                 return 0;
  52
  53         if (state == RFKILL_STATE_ON) {
  54                 INFO(rt2x00dev, "Hardware button pressed, enabling radio.\n");
  55                 __clear_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags);
  56                 retval = rt2x00lib_enable_radio(rt2x00dev);
  57         } else if (state == RFKILL_STATE_OFF) {
  58                 INFO(rt2x00dev, "Hardware button pressed, disabling radio.\n");
  59                 __set_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags);
  60                 rt2x00lib_disable_radio(rt2x00dev);
  61         }
  62
  63         return retval;
  64 }
  65
  66 static void rt2x00rfkill_poll(struct input_polled_dev *poll_dev)
  67 {
  68         struct rt2x00_dev *rt2x00dev = poll_dev->private;
  69         int state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
  70
  71         if (rt2x00dev->rfkill->state != state)
  72                 input_report_key(poll_dev->input, KEY_WLAN, 1);
  73 }
  74
  75 int rt2x00rfkill_register(struct rt2x00_dev *rt2x00dev)
  76 {
  77         int retval;
  78
  79         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
  80                 return 0;
  81
  82         retval = rfkill_register(rt2x00dev->rfkill);
  83         if (retval) {
  84                 ERROR(rt2x00dev, "Failed to register rfkill handler.\n");
  85                 return retval;
  86         }
  87
  88         retval = input_register_polled_device(rt2x00dev->poll_dev);
  89         if (retval) {
  90                 ERROR(rt2x00dev, "Failed to register polled device.\n");
  91                 rfkill_unregister(rt2x00dev->rfkill);
  92                 return retval;
  93         }
  94
  95         return 0;
  96 }
  97
  98 void rt2x00rfkill_unregister(struct rt2x00_dev *rt2x00dev)
  99 {
 100         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 101                 return;
 102
 103         input_unregister_polled_device(rt2x00dev->poll_dev);
 104         rfkill_unregister(rt2x00dev->rfkill);
 105 }
 106
 107 int rt2x00rfkill_allocate(struct rt2x00_dev *rt2x00dev)
 108 {
 109         struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
 110
 111         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 112                 return 0;
 113
 114         rt2x00dev->rfkill = rfkill_allocate(device, RFKILL_TYPE_WLAN);
 115         if (!rt2x00dev->rfkill) {
 116                 ERROR(rt2x00dev, "Failed to allocate rfkill handler.\n");
 117                 return -ENOMEM;
 118         }
 119
 120         rt2x00dev->rfkill->name = rt2x00dev->ops->name;
 121         rt2x00dev->rfkill->data = rt2x00dev;
 122         rt2x00dev->rfkill->state = rt2x00dev->ops->lib->rfkill_poll(rt2x00dev);
 123         rt2x00dev->rfkill->toggle_radio = rt2x00rfkill_toggle_radio;
 124
 125         rt2x00dev->poll_dev = input_allocate_polled_device();
 126         if (!rt2x00dev->poll_dev) {
 127                 ERROR(rt2x00dev, "Failed to allocate polled device.\n");
 128                 rfkill_free(rt2x00dev->rfkill);
 129                 return -ENOMEM;
 130         }
 131
 132         rt2x00dev->poll_dev->private = rt2x00dev;
 133         rt2x00dev->poll_dev->poll = rt2x00rfkill_poll;
 134         rt2x00dev->poll_dev->poll_interval = RFKILL_POLL_INTERVAL;
 135
 136         return 0;
 137 }
 138
 139 void rt2x00rfkill_free(struct rt2x00_dev *rt2x00dev)
 140 {
 141         if (!test_bit(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags))
 142                 return;
 143
 144         input_free_polled_device(rt2x00dev->poll_dev);
 145         rfkill_free(rt2x00dev->rfkill);
 146 }