git.oblomov.eu Git - linux-2.6/blob - drivers/net/wireless/rt2x00/rt2x00leds.c

   1 /*
   2         Copyright (C) 2004 - 2008 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 led specific routines.
  24  */
  25
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28
  29 #include "rt2x00.h"
  30 #include "rt2x00lib.h"
  31
  32 void rt2x00leds_led_quality(struct rt2x00_dev *rt2x00dev, int rssi)
  33 {
  34         if (!rt2x00dev->trigger_qual.registered)
  35                 return;
  36
  37         /*
  38          * Led handling requires a positive value for the rssi,
  39          * to do that correctly we need to add the correction.
  40          */
  41         rssi += rt2x00dev->rssi_offset;
  42
  43         /*
  44          * Get the rssi level, this is used to convert the rssi
  45          * to a LED value inside the range LED_OFF - LED_FULL.
  46          */
  47         if (rssi <= 30)
  48                 rssi = 0;
  49         else if (rssi <= 39)
  50                 rssi = 1;
  51         else if (rssi <= 49)
  52                 rssi = 2;
  53         else if (rssi <= 53)
  54                 rssi = 3;
  55         else if (rssi <= 63)
  56                 rssi = 4;
  57         else
  58                 rssi = 5;
  59
  60         /*
  61          * Note that we must _not_ send LED_OFF since the driver
  62          * is going to calculate the value and might use it in a
  63          * division.
  64          */
  65         led_trigger_event(&rt2x00dev->trigger_qual.trigger,
  66                           ((LED_FULL / 6) * rssi) + 1);
  67 }
  68
  69 static int rt2x00leds_register_trigger(struct rt2x00_dev *rt2x00dev,
  70                                        struct rt2x00_trigger *trigger,
  71                                        const char *name)
  72 {
  73         int retval;
  74
  75         trigger->trigger.name = name;
  76         retval = led_trigger_register(&trigger->trigger);
  77         if (retval) {
  78                 ERROR(rt2x00dev, "Failed to register led trigger.\n");
  79                 return retval;
  80         }
  81
  82         trigger->registered = 1;
  83
  84         return 0;
  85 }
  86
  87 static int rt2x00leds_register_led(struct rt2x00_dev *rt2x00dev,
  88                                    struct rt2x00_led *led,
  89                                    enum led_type type,
  90                                    const char *name, char *trigger)
  91 {
  92         struct device *device = wiphy_dev(rt2x00dev->hw->wiphy);
  93         int retval;
  94
  95         led->led_dev.name = name;
  96         led->led_dev.brightness_set = rt2x00dev->ops->lib->led_brightness;
  97         led->led_dev.default_trigger = trigger;
  98
  99         retval = led_classdev_register(device, &led->led_dev);
 100         if (retval) {
 101                 ERROR(rt2x00dev, "Failed to register led handler.\n");
 102                 return retval;
 103         }
 104
 105         led->rt2x00dev = rt2x00dev;
 106         led->type = type;
 107         led->registered = 1;
 108
 109         return 0;
 110 }
 111
 112 void rt2x00leds_register(struct rt2x00_dev *rt2x00dev)
 113 {
 114         char *trigger;
 115         char dev_name[16];
 116         char name[32];
 117         int retval;
 118
 119         if (!rt2x00dev->ops->lib->led_brightness)
 120                 return;
 121
 122         snprintf(dev_name, sizeof(dev_name), "%s-%s",
 123                  rt2x00dev->ops->name, wiphy_name(rt2x00dev->hw->wiphy));
 124
 125         if (rt2x00dev->led_flags & LED_SUPPORT_RADIO) {
 126                 trigger = ieee80211_get_radio_led_name(rt2x00dev->hw);
 127                 snprintf(name, sizeof(name), "%s:radio", dev_name);
 128
 129                 retval = rt2x00leds_register_led(rt2x00dev,
 130                                                  &rt2x00dev->led_radio,
 131                                                  LED_TYPE_RADIO,
 132                                                  name, trigger);
 133                 if (retval)
 134                         goto exit_fail;
 135         }
 136
 137         if (rt2x00dev->led_flags & LED_SUPPORT_ASSOC) {
 138                 trigger = ieee80211_get_assoc_led_name(rt2x00dev->hw);
 139                 snprintf(name, sizeof(name), "%s:assoc", dev_name);
 140
 141                 retval = rt2x00leds_register_led(rt2x00dev,
 142                                                  &rt2x00dev->led_assoc,
 143                                                  LED_TYPE_ASSOC,
 144                                                  name, trigger);
 145                 if (retval)
 146                         goto exit_fail;
 147         }
 148
 149         if (rt2x00dev->led_flags & LED_SUPPORT_QUALITY) {
 150                 snprintf(name, sizeof(name), "%s:quality", dev_name);
 151
 152                 retval = rt2x00leds_register_trigger(rt2x00dev,
 153                                                      &rt2x00dev->trigger_qual,
 154                                                      name);
 155
 156                 retval = rt2x00leds_register_led(rt2x00dev,
 157                                                  &rt2x00dev->led_qual,
 158                                                  LED_TYPE_QUALITY,
 159                                                  name, name);
 160                 if (retval)
 161                         goto exit_fail;
 162         }
 163
 164         return;
 165
 166 exit_fail:
 167         rt2x00leds_unregister(rt2x00dev);
 168 }
 169
 170 static void rt2x00leds_unregister_trigger(struct rt2x00_trigger *trigger)
 171 {
 172         if (!trigger->registered)
 173                 return;
 174
 175         led_trigger_unregister(&trigger->trigger);
 176         trigger->registered = 0;
 177 }
 178
 179 static void rt2x00leds_unregister_led(struct rt2x00_led *led)
 180 {
 181         if (!led->registered)
 182                 return;
 183
 184         led_classdev_unregister(&led->led_dev);
 185
 186         led->led_dev.brightness_set(&led->led_dev, LED_OFF);
 187         led->registered = 0;
 188 }
 189
 190 void rt2x00leds_unregister(struct rt2x00_dev *rt2x00dev)
 191 {
 192         rt2x00leds_unregister_trigger(&rt2x00dev->trigger_qual);
 193         rt2x00leds_unregister_led(&rt2x00dev->led_qual);
 194         rt2x00leds_unregister_led(&rt2x00dev->led_assoc);
 195         rt2x00leds_unregister_led(&rt2x00dev->led_radio);
 196 }
 197
 198 void rt2x00leds_suspend(struct rt2x00_dev *rt2x00dev)
 199 {
 200         if (rt2x00dev->led_qual.registered)
 201                 led_classdev_suspend(&rt2x00dev->led_qual.led_dev);
 202         if (rt2x00dev->led_assoc.registered)
 203                 led_classdev_suspend(&rt2x00dev->led_assoc.led_dev);
 204         if (rt2x00dev->led_radio.registered)
 205                 led_classdev_suspend(&rt2x00dev->led_radio.led_dev);
 206 }
 207
 208 void rt2x00leds_resume(struct rt2x00_dev *rt2x00dev)
 209 {
 210         if (rt2x00dev->led_radio.registered)
 211                 led_classdev_resume(&rt2x00dev->led_radio.led_dev);
 212         if (rt2x00dev->led_assoc.registered)
 213                 led_classdev_resume(&rt2x00dev->led_assoc.led_dev);
 214         if (rt2x00dev->led_qual.registered)
 215                 led_classdev_resume(&rt2x00dev->led_qual.led_dev);
 216 }