【LEDE】树莓派上玩LEDE终极指南-96-树莓派上LEDE挂卡只能半速的解决方法

在/lib/wifi/mac80211.sh文件中：

#!/bin/sh
append DRIVERS "mac80211"

lookup_phy() {
[ -n "$phy" ] && {
[ -d /sys/class/ieee80211/$phy ] && return
}

local devpath
config_get devpath "$device" path
[ -n "$devpath" ] && {
for phy in $(ls /sys/class/ieee80211 2>/dev/null); do
case "$(readlink -f /sys/class/ieee80211/$phy/device)" in
*$devpath) return;;
esac
done
}

local macaddr="$(config_get "$device" macaddr | tr 'A-Z' 'a-z')"
[ -n "$macaddr" ] && {
for _phy in /sys/class/ieee80211/*; do
[ -e "$_phy" ] || continue

[ "$macaddr" = "$(cat ${_phy}/macaddress)" ] || continue
phy="${_phy##*/}"
return
done
}
phy=
return
}

find_mac80211_phy() {
local device="$1"

config_get phy "$device" phy
lookup_phy
[ -n "$phy" -a -d "/sys/class/ieee80211/$phy" ] || {
echo "PHY for wifi device $1 not found"
return 1
}
config_set "$device" phy "$phy"

config_get macaddr "$device" macaddr
[ -z "$macaddr" ] && {
config_set "$device" macaddr "$(cat /sys/class/ieee80211/${phy}/macaddress)"
}

return 0
}

check_mac80211_device() {
config_get phy "$1" phy
[ -z "$phy" ] && {
find_mac80211_phy "$1" >/dev/null || return 0
config_get phy "$1" phy
}
[ "$phy" = "$dev" ] && found=1
}

detect_mac80211() {
devidx=0
config_load wireless
while :; do
config_get type "radio$devidx" type
[ -n "$type" ] || break
devidx=$(($devidx + 1))
done

for _dev in /sys/class/ieee80211/*; do
[ -e "$_dev" ] || continue

dev="${_dev##*/}"

found=0
config_foreach check_mac80211_device wifi-device
[ "$found" -gt 0 ] && continue

mode_band="g"
channel="11"
htmode=""
ht_capab=""

iw phy "$dev" info | grep -q 'Capabilities:' && htmode=HT20
iw phy "$dev" info | grep -q '2412 MHz' || { mode_band="a"; channel="36"; }

vht_cap=$(iw phy "$dev" info | grep -c 'VHT Capabilities')
cap_5ghz=$(iw phy "$dev" info | grep -c "Band 2")
[ "$vht_cap" -gt 0 -a "$cap_5ghz" -gt 0 ] && {
mode_band="a";
channel="36"
htmode="VHT80"
}

[ -n $htmode ] && ht_capab="set wireless.radio${devidx}.htmode=$htmode"

if [ -x /usr/bin/readlink -a -h /sys/class/ieee80211/${dev} ]; then
path="$(readlink -f /sys/class/ieee80211/${dev}/device)"
else
path=""
fi
if [ -n "$path" ]; then
path="${path##/sys/devices/}"
case "$path" in
platform*/pci*) path="${path##platform/}";;
esac
dev_id="set wireless.radio${devidx}.path='$path'"
else
dev_id="set wireless.radio${devidx}.macaddr=$(cat /sys/class/ieee80211/${dev}/macaddress)"
fi

uci -q batch <<-EOF
set wireless.radio${devidx}=wifi-device
set wireless.radio${devidx}.type=mac80211
set wireless.radio${devidx}.channel=${channel}
set wireless.radio${devidx}.hwmode=11${mode_band}
${dev_id}
${ht_capab}
set wireless.radio${devidx}.disabled=1
set wireless.radio${devidx}.noscan=1 #重点是这句！！！复制的时候把#号后面的东西去掉。

set wireless.default_radio${devidx}=wifi-iface
set wireless.default_radio${devidx}.device=radio${devidx}
set wireless.default_radio${devidx}.network=lan
set wireless.default_radio${devidx}.mode=ap
set wireless.default_radio${devidx}.ssid=OpenWrt_$(cat /sys/class/ieee80211/${dev}/macaddress | awk -F ":" '{print $4""$5""$6 }' | tr a-z A-Z)
set wireless.default_radio${devidx}.encryption=psk2
set wireless.default_radio${devidx}.key=805447391
set wireless.default_radio${devidx}.noscan=1

EOF
uci -q commit wireless

devidx=$(($devidx + 1))
done
}