The flash layout on the Storlink reference design for Gemini
is using 2 MB flash for the kernel, and it also insists on
overwriting the partition table with default values on every
boot. The same is true for the SQ201. This poses a problem
on recent OpenWrt firmware as the base zImage is bigger
than 2 MB.
At the same time there is a ramdisk partition of 6 MB that we
don't really need. The partition table looks like this:
Creating 7 MTD partitions on "30000000.flash":
0x000000000000-0x000000016000 : "BOOT"
0x000000120000-0x000000320000 : "Kern"
0x000000320000-0x000000920000 : "Ramdisk"
0x000000920000-0x000000f20000 : "Application"
0x000000f20000-0x000000f40000 : "VCTL"
0x000000f40000-0x000000fe0000 : "CurConf"
0x000000fe0000-0x000001000000 : "FIS directory"
On boot the "Kern" partition is copied to RAM @0x01600000
and the "Ramdisk" partition is copied to RAM @0x00800000.
Then the kernel is executed.
The idea with this patch is to extend the "Kern" partition
with the "Ramdisk" partition to get a full 8 MB to use
for the kernel. Then we put the OpenWrt JFFS2 rootfs
inside the "Application" partition.
We create a small assembly loop that we prepend to the
"Kern" image that will copy the "Kern" from 0x0160000
and the "Ramdisk" from 0x00800000 and put them in
consecutive space at 0x00400000 and execute it from
there, using "Application" as rootfs.
We generate 3 main files:
- zImage - contains the assembly bootstrap loop and
the first part of the generated kernel image
- rd.gz - contains the second part of the generated
kernel image
- hddapp.tgz - contains the root filesystem
On the SQ201 I flash these manually using the native boot
loader PLATO, "Y" alternative for the zImage, "R" for
the rd.gz image and "A" for hddapp.tgz.
This works fine and I can now boot to prompt on the SQ201
with nothing but flash.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The SL93512r and the NAS4220B have Redboot partition
tables (rely on these) and need to boot from mtdblock3.
Add two patches from upstream to fix this.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
It's a simple typo in the DNS file, which was pretty serious.
No scripts were working properly. Fix it up.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
[integrate upstream patch into openwrt target]
The squashfs+jffs2 root filesystem only came up as read-only
and the config would not take:
[ 25.600237] mount_root: Could not open mtd device: /dev/mtd4
[ 25.634674] mount_root: reading rootfs_data failed
[ 25.665346] mount_root: Could not open mtd device: /dev/mtd3
[ 25.699802] mount_root: reading rootfs failed
[ 25.726426] mount_root: mounting /dev/root
Well that is not very strange since the whole firmware partition
is made read-only in the device tree. Let's fix that by augmenting
the OpenWrt patch.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We currently generate a kernel that boots from the harddrive
in the DIR-685. That's not how we usually do things, so
let's augment it to boot from flash and mount the rootfs
using squashfs and JFFS2 like everyone else.
Partition splitting only work when the partitions are
inside of a "partitions" node which is why we have a patch
like this (submitted upstream).
Another patch drops the rootfs arguments and renames the
firmware partition while adding the compatible "wrg"
to it so the WRGG parser will kick in.
Factory image was tested by bravely reflashing the DIR-685
from stock firmware using the web UI and the serial console
boot loader.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is the remainder of kernel patches for the v4.19
kernel. A whole slew of the previous patch stack is now
upstream, so this mainly contains the stuff that was
added upstream between v4.19 and v5.0-rc1, and then
the USB FOTG201 patches from Hans.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
