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authorMartin Blumenstingl <martin.blumenstingl@googlemail.com>2016-09-18 23:29:35 +0200
committerFelix Fietkau <nbd@nbd.name>2016-09-28 08:39:01 +0200
commite7be0decf65a2d3ecbe344bcb172151516815935 (patch)
tree397c360ae5f244c05180d5ffa58d60add85ef915 /target/linux/ar71xx/base-files/lib
parent3fbd235fb5484236393341f168d927c7a6feb3f4 (diff)
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ar71xx: Do not use a hardcoded ath10k firmware mac address
ar71xx has an init-script for special devices where the ath10k OTP calibration data is stored on the PCIe card's EEPROM (and thus can only be read by ath10k). Unfortunately the OTP data uses the default mac address (= all devices come with the same mac address, which leads to problems when you have multiple of these devices in the same network). To work around this the mac address is patched in the firmware during the first boot of the device. To prevent flash wear this was only done if the ath10k firmware matched a hardcoded md5sum. However, if the md5sum does not match this can mean that either the mac address was already patched (which is fine) - unfortunately it can also mean that the firmware version was updated without updating the hardcoded md5sum. Change the "was the mac address already patched" check to actually compare the mac address inside the ath10k firmware. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Diffstat (limited to 'target/linux/ar71xx/base-files/lib')
-rw-r--r--target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k17
1 files changed, 10 insertions, 7 deletions
diff --git a/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k b/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k
index af12bd5d92..b6af921449 100644
--- a/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k
+++ b/target/linux/ar71xx/base-files/lib/preinit/82_patch_ath10k
@@ -12,16 +12,19 @@ do_patch_ath10k_firmware() {
return
}
- local firmware_md5_orig="fcb2fbd42d73a63fbf603505c718cbde"
- local firmware_md5_current="$(md5sum $firmware_file)"
- local firmware_md5_current="${firmware_md5_current%% *}"
+ local mac_offset=276
+ local mac_length=6
+ local default_mac="00:03:07:12:34:56"
+ local current_mac="$(hexdump -v -n $mac_length -s $mac_offset -e '5/1 "%02x:" 1/1 "%02x"' $firmware_file 2>/dev/null)"
- # verify md5sum before patching
- [ "$firmware_md5_orig" != "$firmware_md5_current" ] || {
+ # check if mac address was already patched
+ [ "$default_mac" = "$current_mac" ] || {
return
}
- # some boards have bogus mac in otp, patch the default mac in the firmware
+ # some boards have bogus mac in otp (= directly in the PCIe card's EEPROM).
+ # we have to patch the default mac in the firmware because we cannot change
+ # the otp.
case $(ar71xx_board_name) in
dgl-5500-a1 | tew-823dru)
local mac
@@ -29,7 +32,7 @@ do_patch_ath10k_firmware() {
cp $firmware_file /tmp/ath10k-firmware.bin
macaddr_2bin $mac | dd of=/tmp/ath10k-firmware.bin \
- conv=notrunc bs=1 seek=276 count=6
+ conv=notrunc bs=1 seek=$mac_offset count=$mac_length
;;
esac