This patch improves faf64056dd by correcting
the partition scheme for the "RouterBoot" section of the flash.
The partition scheme initially submitted is incorrect and does not reflect
the actual flash structure.
The "RouterBoot" section (name matching OEM) is subdivided in several
static segments, as they are on ar71xx RB devices albeit with different
offsets and sizes.
The naming convention from ar71xx has been preserved, except for the
bootloaders which are named "bootloader1" and "bootloader2" to avoid
confusion with the master "RouterBoot" partition.
The preferred 'fixed-partitions' DTS node syntax is used, with nesting
support as introduced in 2a598bbaa3.
"partition" is used for node names, with associated "label" to match
policy set by 6dd94c2781.
Leave a note in DTS to explain how the original author selected the SPI speed.
Tested-by: Tobias Schramm <tobleminer@gmail.com>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
Reviewed-by: Rafał Miłecki <rafal@milecki.pl>
Starting with kernel 4.4, the use of partitions as direct subnodes of the
mtd device is discouraged and only supported for backward compatiblity
reasons.
Signed-off-by: Alex Maclean <monkeh@monkeh.net>
The device name is corrected to match the hardware-stored (in hard config
flash space) device name.
Tested-by: Tobias Schramm <tobleminer@gmail.com>
Signed-off-by: Thibaut VARÈNE <hacks@slashdirt.org>
This commit adds support for the MikroTik RouterBOARD RBM11g.
=Hardware=
The RBM11g is a mt7621 based device featuring one GbE port and one
miniPCIe slot with a sim card socket and USB 2.0.
==Switch==
The single onboard Ethernet port is connected the CPU directly.
The internal switch of the mt7621 SoC is disabled.
==Flash==
The device has one spi nor flash chip. It is a 128 Mbit winbond 25Q128FVS
connected to CS0.
==PCIe==
The board features a single miniPCIe slot. It has a dedicated mini SIM
socket and a USB 2.0 port. Power to the miniPCIe slot is controlled via
GPIO9.
==USB==
There are no external USB ports.
==Power==
The board can accept both, passive PoE and external power via a 2.1 mm
barrel jack (center-positive). The input voltage range is 11-32 V.
==Serial port==
The device does have an onboard UART on an unpopulated header next to the
flash chip:
GND: pin 2
TX: pin 7
RX: pin 6
Settings: 115200, 8N1
See below illustration for positioning of the header.
0 = screw hole
* = some pin
T = TX pin
R = RX pin
G = GND pin
Pinout:
+---------------
|O
| __
| / \
| \__/
|
|
|
| +---+
| |RAM|
| +--+ | |
| |**| <- unpopulated header with UART
| |*T| +---+
| |R*| +--------+
| |**| | |
| |G*| | CPU |
| +--+ | |
| +--+ | |
| | | +--------+
| +--+ <- flash chip
|O
| +-----+
| | |
|+--+ | |
|| | | |
+---------------------
=Installation=
To install an OpenWRT image to the device two components must be built:
1. A openwrt initramfs image
2. A openwrt sysupgrade image
===initramfs & sysupgrade image===
Select target devices "Mikrotik RBM11G" in
openwrt menuconfig and build the images. This will create the images
"openwrt-ramips-mt7621-mikrotik_rbm11g-initramfs-kernel.bin" and
"openwrt-ramips-mt7621-mikrotik_rbm11g-squashfs-sysupgrade.bin" in the
output directory.
==Installing==
**Make sure to back up your RouterOS license in case you do ever want to
go back to RouterOS using "/system license output" and back up the
created license file.**
When rebooted the board will try booting via ethernet first. If your
board does not boot via ethernet automatically you will have to attach
to the serial port and set ethernet as boot device within RouterBOOT.
1. Set up a dhcp server that points the bootfile to tftp server serving
the "openwrt-ramips-mt7621-mikrotik_rbm11g-initramfs-kernel.bin"
initramfs image
2. Connect to ethernet port on board
3. Power on the board
4. Wait for OpenWrt to boot
Right now OpenWrt will be running with a SSH server listening. Now
OpenWrt must be flashed to the devices flash:
1. Copy "openwrt-ramips-mt7621-mikrotik_rbm11g-squashfs-sysupgrade.bin"
to the device using scp.
2. Write openwrt to flash using "sysupgrade
openwrt-ramips-mt7621-mikrotik_rbm11g-squashfs-sysupgrade.bin"
Once the flashing completes the board will reboot. Disconnect from the
devices ethernet port or stop the DHCP/TFTP server to prevent the device
from booting via ethernet again.
The device should now boot straight to OpenWrt.
Signed-off-by: Tobias Schramm <tobleminer@gmail.com>
