net/mac80211/ieee80211_led.c

   1 /*
   2  * Copyright 2006, Johannes Berg <johannes@sipsolutions.net>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8
   9 /* just for IFNAMSIZ */
  10 #include <linux/if.h>
  11 #include "ieee80211_led.h"
  12
  13 void ieee80211_led_rx(struct ieee80211_local *local)
  14 {
  15         if (unlikely(!local->rx_led))
  16                 return;
  17         if (local->rx_led_counter++ % 2 == 0)
  18                 led_trigger_event(local->rx_led, LED_OFF);
  19         else
  20                 led_trigger_event(local->rx_led, LED_FULL);
  21 }
  22
  23 /* q is 1 if a packet was enqueued, 0 if it has been transmitted */
  24 void ieee80211_led_tx(struct ieee80211_local *local, int q)
  25 {
  26         if (unlikely(!local->tx_led))
  27                 return;
  28         /* not sure how this is supposed to work ... */
  29         local->tx_led_counter += 2*q-1;
  30         if (local->tx_led_counter % 2 == 0)
  31                 led_trigger_event(local->tx_led, LED_OFF);
  32         else
  33                 led_trigger_event(local->tx_led, LED_FULL);
  34 }
  35
  36 void ieee80211_led_init(struct ieee80211_local *local)
  37 {
  38         local->rx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
  39         if (!local->rx_led)
  40                 return;
  41         snprintf(local->rx_led_name, sizeof(local->rx_led_name),
  42                  "%srx", wiphy_name(local->hw.wiphy));
  43         local->rx_led->name = local->rx_led_name;
  44         if (led_trigger_register(local->rx_led)) {
  45                 kfree(local->rx_led);
  46                 local->rx_led = NULL;
  47         }
  48
  49         local->tx_led = kzalloc(sizeof(struct led_trigger), GFP_KERNEL);
  50         if (!local->tx_led)
  51                 return;
  52         snprintf(local->tx_led_name, sizeof(local->tx_led_name),
  53                  "%stx", wiphy_name(local->hw.wiphy));
  54         local->tx_led->name = local->tx_led_name;
  55         if (led_trigger_register(local->tx_led)) {
  56                 kfree(local->tx_led);
  57                 local->tx_led = NULL;
  58         }
  59 }
  60
  61 void ieee80211_led_exit(struct ieee80211_local *local)
  62 {
  63         if (local->tx_led) {
  64                 led_trigger_unregister(local->tx_led);
  65                 kfree(local->tx_led);
  66         }
  67         if (local->rx_led) {
  68                 led_trigger_unregister(local->rx_led);
  69                 kfree(local->rx_led);
  70         }
  71 }
  72
  73 char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
  74 {
  75         struct ieee80211_local *local = hw_to_local(hw);
  76
  77         if (local->tx_led)
  78                 return local->tx_led_name;
  79         return NULL;
  80 }
  81 EXPORT_SYMBOL(__ieee80211_get_tx_led_name);
  82
  83 char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
  84 {
  85         struct ieee80211_local *local = hw_to_local(hw);
  86
  87         if (local->rx_led)
  88                 return local->rx_led_name;
  89         return NULL;
  90 }
  91 EXPORT_SYMBOL(__ieee80211_get_rx_led_name);