lantiq: do an endianness swap to the RT2860 eeprom for ARV752DPW(22)
authorJohn Crispin <john@openwrt.org>
Sun, 30 Mar 2014 09:16:52 +0000 (09:16 +0000)
committerJohn Crispin <john@openwrt.org>
Sun, 30 Mar 2014 09:16:52 +0000 (09:16 +0000)
ARV7510PW22, ARV752DPW and ARV752DPW22 have the RT2860 eeprom stored in
flash as big-endian, but the driver needs it in little-endian format. We
have to swab it before handing it over. This requires my earlier patch
for busybox.

Funnily enough, ARV752DPW works also with the incorrect eeprom, but
undoubtedly unoptimally. I have a hunch that also the final remaining
Lantiq board would require this swabbing, but I'm not sure, so I just
swab it in the three boards that I know about.

v2:
* Swab also on ARV7510PW22 based on feedback from Alvaro Rojas
* Fix the offset with bs=2

Signed-off-by: Matti Laakso <malaakso at elisanet.fi>
SVN-Revision: 40328

target/linux/lantiq/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom

index a849584..427c5fc 100644 (file)
@@ -10,6 +10,7 @@ rt2x00_eeprom_extract() {
        local part=$1
        local offset=$2
        local count=$3
+       local swab=$4
        local mtd
 
        . /lib/functions.sh
@@ -18,8 +19,13 @@ rt2x00_eeprom_extract() {
        [ -n "$mtd" ] || \
                rt2x00_eeprom_die "no mtd device found for partition $part"
 
-       dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count || \
-               rt2x00_eeprom_die "failed to extract from $mtd"
+       if [ $swab -gt 0 ]; then
+               dd if=$mtd of=/lib/firmware/$FIRMWARE bs=2 skip=$offset count=$count conv=swab || \
+                       rt2x00_eeprom_die "failed to extract from $mtd"
+       else
+               dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count || \
+                       rt2x00_eeprom_die "failed to extract from $mtd"
+       fi
 }
 
 [ -e /lib/firmware/$FIRMWARE ] && exit 0
@@ -29,8 +35,11 @@ case "$FIRMWARE" in
 "RT2860.eeprom" )
        local board=$(lantiq_board_id)
        case $board in
-       ARV7510PW22|ARV7519PW|ARV7525PW|ARV752DPW|ARV752DPW22)
-               rt2x00_eeprom_extract "board_config" 1040 512
+       ARV7510PW22|ARV7519PW|ARV752DPW|ARV752DPW22)
+               rt2x00_eeprom_extract "board_config" 520 256 1
+               ;;
+       ARV7525PW)
+               rt2x00_eeprom_extract "board_config" 1040 512 0
                ;;
        *)
                rt2x00_eeprom_die "board $board is not supported yet"