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rockchip: ensure NanoPi R4S has unique MAC address

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Ensure the MAC address for all NanoPi R4S boards is assigned unique for
each board.

FriendlyElec ship two versions of the R4S: The standard as well as the
enterprise edition with only the enterprise edition including the EEPROM
chip that stores the unique MAC address.

In order to assign both board types unique MAC addresses, fall back on
the same method used for the NanoPi R2S in case the EEPROM chip is not
present by generating the board MAC from the SD card CID.

[0] https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R4S#Differences_Between_R4S_Standard_Version_.26_R4S_Enterprise_Version

Signed-off-by: David Bauer <mail@david-bauer.net>
This commit is contained in:
David Bauer 2022-09-10 01:01:57 +02:00
parent 2ca5602864
commit b5675f500d
1 changed files with 28 additions and 5 deletions
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33
target/linux/rockchip/armv8/base-files/etc/board.d/02_network
View File

@ -17,13 +17,36 @@ rockchip_setup_interfaces()
esac
}
nanopi_r2s_generate_mac()
generate_mac_from_mmc_cid()
{
local sd_hash=$(sha256sum /sys/class/block/mmcblk0/device/cid)
local mmc_dev=$1
local sd_hash=$(sha256sum /sys/class/block/$mmc_dev/device/cid)
local mac_base=$(macaddr_canonicalize "$(echo "${sd_hash}" | dd bs=1 count=12 2>/dev/null)")
echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${mac_base}")")"
}
nanopi_r4s_get_mac()
{
local interface=$1
local eeprom_path="/sys/bus/i2c/devices/2-0051/eeprom"
local address
if [ -f "$eeprom_path" ]; then
address=$(get_mac_binary "$eeprom_path" 0xfa)
if [ "$interface" = "lan" ]; then
address=$(macaddr_setbit_la "$address")
fi
else
address=$(generate_mac_from_mmc_cid mmcblk1)
if [ "$interface" = "lan" ]; then
address=$(macaddr_add "$address" 1)
fi
fi
echo "$address"
}
rockchip_setup_macs()
{
local board="$1"
@ -33,12 +56,12 @@ rockchip_setup_macs()
case "$board" in
friendlyarm,nanopi-r2s)
wan_mac=$(nanopi_r2s_generate_mac)
wan_mac=$(generate_mac_from_mmc_cid mmcblk0)
lan_mac=$(macaddr_add "$wan_mac" 1)
;;
friendlyarm,nanopi-r4s)
wan_mac=$(get_mac_binary "/sys/bus/i2c/devices/2-0051/eeprom" 0xfa)
lan_mac=$(macaddr_setbit_la "$wan_mac")
wan_mac=$(nanopi_r4s_get_mac wan)
lan_mac=$(nanopi_r4s_get_mac lan)
;;
esac