package/base-files/files/lib/functions/leds.sh

   1 # Copyright (C) 2013 OpenWrt.org
   2
   3 get_dt_led_path() {
   4         local ledpath
   5         local basepath="/proc/device-tree"
   6         local nodepath="$basepath/aliases/led-$1"
   7
   8         [ -f "$nodepath" ] && ledpath=$(cat "$nodepath")
   9         [ -n "$ledpath" ] && ledpath="$basepath$ledpath"
  10
  11         echo "$ledpath"
  12 }
  13
  14 get_dt_led_color_func() {
  15         local enum
  16         local func
  17         local idx
  18         local label
  19
  20         [ -e "$1/function" ] && func=$(cat "$1/function")
  21         [ -e "$1/color" ] && idx=$((0x$(hexdump -n 4 -e '4/1 "%02x"' "$1/color")))
  22         [ -e "$1/function-enumerator" ] && \
  23                 enum=$((0x$(hexdump -n 4 -e '4/1 "%02x"' "$1/function-enumerator")))
  24
  25         [ -z "$idx" ] && [ -z "$func" ] && return 2
  26
  27         if [ -n "$idx" ]; then
  28                 for color in "white" "red" "green" "blue" "amber" \
  29                              "violet" "yellow" "ir" "multicolor" "rgb" \
  30                              "purple" "orange" "pink" "cyan" "lime"
  31                 do
  32                         [ $idx -eq 0 ] && label="$color" && break
  33                         idx=$((idx-1))
  34                 done
  35         fi
  36
  37         label="$label:$func"
  38         [ -n "$enum" ] && label="$label-$enum"
  39         echo "$label"
  40
  41         return 0
  42 }
  43
  44 get_dt_led() {
  45         local label
  46         local ledpath=$(get_dt_led_path $1)
  47
  48         [ -n "$ledpath" ] && \
  49                 label=$(cat "$ledpath/label" 2>/dev/null) || \
  50                 label=$(cat "$ledpath/chan-name" 2>/dev/null) || \
  51                 label=$(get_dt_led_color_func "$ledpath") || \
  52                 label=$(basename "$ledpath")
  53
  54         echo "$label"
  55 }
  56
  57 led_set_attr() {
  58         [ -f "/sys/class/leds/$1/$2" ] && echo "$3" > "/sys/class/leds/$1/$2"
  59 }
  60
  61 led_timer() {
  62         led_set_attr $1 "trigger" "timer"
  63         led_set_attr $1 "delay_on" "$2"
  64         led_set_attr $1 "delay_off" "$3"
  65 }
  66
  67 led_on() {
  68         led_set_attr $1 "trigger" "none"
  69         led_set_attr $1 "brightness" 255
  70 }
  71
  72 led_off() {
  73         led_set_attr $1 "trigger" "none"
  74         led_set_attr $1 "brightness" 0
  75 }
  76
  77 status_led_restore_trigger() {
  78         local trigger
  79         local ledpath=$(get_dt_led_path $1)
  80
  81         [ -n "$ledpath" ] && \
  82                 trigger=$(cat "$ledpath/linux,default-trigger" 2>/dev/null)
  83
  84         [ -n "$trigger" ] && \
  85                 led_set_attr "$(get_dt_led $1)" "trigger" "$trigger"
  86 }
  87
  88 status_led_set_timer() {
  89         led_timer $status_led "$1" "$2"
  90         [ -n "$status_led2" ] && led_timer $status_led2 "$1" "$2"
  91 }
  92
  93 status_led_set_heartbeat() {
  94         led_set_attr $status_led "trigger" "heartbeat"
  95 }
  96
  97 status_led_on() {
  98         led_on $status_led
  99         [ -n "$status_led2" ] && led_on $status_led2
 100 }
 101
 102 status_led_off() {
 103         led_off $status_led
 104         [ -n "$status_led2" ] && led_off $status_led2
 105 }
 106
 107 status_led_blink_slow() {
 108         led_timer $status_led 1000 1000
 109 }
 110
 111 status_led_blink_fast() {
 112         led_timer $status_led 100 100
 113 }
 114
 115 status_led_blink_preinit() {
 116         led_timer $status_led 100 100
 117 }
 118
 119 status_led_blink_failsafe() {
 120         led_timer $status_led 50 50
 121 }
 122
 123 status_led_blink_preinit_regular() {
 124         led_timer $status_led 200 200
 125 }