While an image layout based on MBR and 'bootfs' partition may be easy
to understand for users who are very used to the IBM PC and always have
the option to access the SD card outside of the device (and hence don't
really depend on other recovery methods or dual-boot), in my opinion
it's a dead end for many desirable features on embedded systems,
especially when managed remotely (and hence without an easy option to
access the SD card using another device in case things go wrong, for
example).
Let me explain:
* using a MSDOS/VFAT filesystem to store kernel(s) is problematic, as a
single corruption of the bootfs can render the system into a state
that it no longer boots at all. This makes dual-boot useless, or at
least very tedious to setup with then 2 independent boot partitions
to avoid the single point of failure on a "hot" block (the FAT index
of the boot partition, written every time a file is changed in
bootfs). And well: most targets even store the bootloader environment
in a file in that very same FAT filesystem, hence it cannot be used
to script a reliable dual-boot method (as loading the environment
itself will already fail if the filesystem is corrupted).
* loading the kernel uImage from bootfs and using rootfs inside an
additional partition means the bootloader can only validate the
kernel -- if rootfs is broken or corrupted, this can lead to a reboot
loop, which is often a quite costly thing to happen in terms of
hardware lifetime.
* imitating MBR-boot behavior with a FAT-formatted bootfs partition
(like IBM PC in the 80s and 90s) is just one of many choices on
embedded targets. There are much better options with modern U-Boot
(which is what we use and build from source for all targets booting
off SD cards), see examples in mediatek/mt7622 and mediatek/mt7623.
Hence rename the 'sdcard' feature to 'legacy-sdcard', and prefix
functions with 'legacy_sdcard_' instead of 'sdcard_'.
Tested-by: Stijn Tintel <stijn@linux-ipv6.be>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Now that we have a generic sdcard upgrade method, which was copied from
the mvebu platform method, we can switch mvebu to the generic method.
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
So far, board.d files were having execute bit set and contained a
shebang. However, they are just sourced in board_detect, with an
apparantly unnecessary check for execute permission beforehand.
Replace this check by one for existance and make the board.d files
"normal" files, as would be expected in /etc anyway.
Note:
This removes an apparantly unused '#!/bin/sh /etc/rc.common' in
target/linux/bcm47xx/base-files/etc/board.d/01_network
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Add support for Marvell MACCHIATObin Single Shot, cortex-a72 based
Marvell ARMADA 8040 Community board. Single Shot was broken as the
device tree is different on the Double Shot Board.
Specifications:
- Quad core Cortex-A72 (up to 2GHz)
- DDR4 DIMM slot with optional ECC and single/dual chip select support
- Dual 10GbE (1/2.5/10GbE) SFP+
2.5GbE (1/2.5GbE) via SFP
1GbE via copper
- SPI Flash
- 3 X SATA 3.0 connectors
- MicroSD connector
- eMMC
- PCI x4 3.0 slot
- USB 2.0 Headers (Internal)
- USB 3.0 connector
- Console port (UART) over microUSB connector
- 20-pin Connector for CPU JTAG debugger
- 2 X UART Headers
- 12V input via DC Jack
- ATX type power connector
- Form Factor: Mini-ITX (170 mm x 170 mm)
More details at http://macchiatobin.net
Installation:
Write the Image to your Micro SD Card and insert it in the
MACCHIATObin Single Shot SD Card Slot.
In the U-Boot Environment:
1. reset U-Boot environment:
env default -a
saveenv
2. prepare U-Boot with boot script:
setenv bootcmd "load mmc 1:1 0x4d00000 boot.scr; source 0x4d00000"
saveenv
or manually (hanging lines indicate wrapped one-line command):
setenv fdt_name armada-8040-mcbin-singleshot.dtb
setenv image_name Image
setenv bootcmd 'mmc dev 1; ext4load mmc 1:1 $kernel_addr
$image_name;ext4load mmc 1:1 $fdt_addr $fdt_name;setenv
bootargs $console root=/dev/mmcblk1p2 rw rootwait; booti
$kernel_addr - $fdt_addr'
saveenv
On newer Bootloaders (18.12) the Variables have been changed, use:
setenv fdt_name armada-8040-mcbin-singleshot.dtb
setenv image_name Image
setenv bootcmd 'mmc dev 1; ext4load mmc 1:1 $kernel_addr_r
$image_name;ext4load mmc 1:1 $fdt_addr_r $fdt_name;setenv
bootargs $console root=/dev/mmcblk1p2 rw rootwait; booti
$kernel_addr_r - $fdt_addr_r'
Reported-by: Alexandra Alth <alexandra@alth.de>
Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
Tested-by: Alexandra Alth <alexandra@alth.de>
[add specs and installation as provided by Alexandra Alth]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Between kernels 4.20 and 5.0, a new variant of this board has been
introduced ("Single Shot"), and the existing one has been renamed
with the appendix "Double Shot". [1]
This also adjusted the first compatible in the list:
marvell,armada8040-mcbin -> marvell,armada8040-mcbin-doubleshot
This patch updates the OpenWrt implementation of this device by
adjusting the relevant references to that compatible (i.e., our
board name).
To still provide support for 4.19 with our setup, this adds a
small patch to change the compatible there as well.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b1f0bbe2700051886b954192b6c1751233fe0f52
Cc: Tomasz Maciej Nowak <tomek_n@o2.pl>
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Reviewed-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
For the mvebu target in particular, there is a lot of files in
base-files that are only relevant for one subtarget. Improve
overview and reduce size per subtarget by moving/splitting
base-files depending on the subtarget they belong to.
While at it, consolidate 01_leds by using the model part of
the board name as variable.
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
