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lantiq: do an endianness swap to the RT2860 eeprom for ARV752DPW(22)

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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
This commit is contained in:
John Crispin 2014-03-30 09:16:52 +00:00
parent 1966d4942c
commit 42e8cb6388
1 changed files with 13 additions and 4 deletions
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17
target/linux/lantiq/base-files/etc/hotplug.d/firmware/10-rt2x00-eeprom
View 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"