The root overlay is mounted on the "rootfs_data" partition. This comes
at the end of the firmware image, courtesy of mtdsplit. There is very
little space left (About 1MB), which can fill up rapidly.
The "firmware" and "firmware2" partitions are part of the bootloader
dual firmware logic. They should contain independent, valid uImages.
This leaves "jffs2-cfg" (mtd3) and "jffs2-log" (mtd4) as candidates.
mtd3 is about 13.7 MB and is used by the vendor firmware to store
configuration settings. It is only erased by vendor firmware during a
factory reset. By naming this partition "rootfs_data", it becomes the
root overlay, providing significantly more room. Even with mtdsplit
wanting to create a "rootfs_data" on the firmware partition, mtd3 is
used as the overlay.
Rename "jffs2-cfg" to "rootfs_data", and profit from the extra space.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
GPIO 1 on the RTL8231 is used to force the PoE MCU to disable power
outputs. It is not used by any driver, but if accidentally set low,
PoE outputs are disabled. This situation is hard to debug, and
requires knowledge of the Broadcom PoE protocol used by the MCU.
To prevent this situation, hog it as an output high. This is
consistent with the ZyXel GS1900 series handles it.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The SFP cages 9F and 10F share the same SCL line. Currently, there
isn't a good way to model this. Thus, only one SFP port can be fully
supported.
Cage 10F is fully supported with an I2C bus and sfp handle. Linux
automatically handles enabling or disabling the TX laser.
Cage 9F is only parially supported, without the sfp handle. The SDA
line is hogged as an input, so that it remains high. SCL transitions
sould not affect modules connected to this cage. The default value of
the tx-disable line is high (active). It is exported as a gpio, but
the laser is off by default. To enable the laser:
echo 0 > /sys/class/gpio/sff-p9-tx-disable/value
Thus, both modules can be used for networking, but only 10F will be
able to detect and identify a plugged in SFP module.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add support for the Engenius EWS2910P PoE switch. This is an RTL8380
based switch with two SFP slots, and PoE 802.3af one every RJ-45 port.
The specs say 802.3af, but the vendor firmware configures the PSE for
a budget of 31W, indicating 802.3at support.
Specifications:
---------------
* SoC: Realtek RTL8380M
* Flash: 32 MiB SPI flash Macronix MX25L25635E
* RAM: 256 MiB (As reported by bootloader)
* Ethernet: 16x 10/100/1000 Mbps with PoE
2x SFP slots
* Buttons: 1 "Reset" button on front panel
1 "LED mode: button on front panel
1 "On/Off" Toggle switch on the back
* Power: 48V-54V DC barrel jack
* UART: 1 serial header (JP1) with populated 2.54mm pitch header
Labeled GRTV for ground, rx, tx, and 3.3V respectively
* PoE: 1 STM ST32F100 microcontroller
2 BCM59111 PSE chips
Works:
------
- (8) RJ-45 ethernet ports
- Switch functions
- LEDs and buttons
Not yet enabled:
----------------
- SFP ports (will be enabled in a subsequent change)
- Power-over-Ethernet (requires realtek-poe package)
Install via web interface:
-------------------------
The factory firmware will accept and flash the initramfs image. It is
recommended to flash to "Partition 0". Flashing to "Partition 1" is
not supported at this point.
The factory web GUI will show the following warning:
" Warning: The firmware version is v0.00.00-c0.0.00
The firmware image you are uploading is older than the current
firmware of the switch. The device will reset back to default
settings. Are you sure you want to proceed?"
This is expected when flashing OpenWrt. After the initramfs image
boots, flash the -sysupgrade using either the commandline or LuCI.
Install via serial console/tftp:
--------------------------------
The u-boot firmware will not stop the boot, regardless of which key is
pressed. To access the u-boot console, ground out the CLK (pin 16) of
the ROM (U22) when u-boot is reading the linux image. If timed
correctly, the image CRC will fail, and u-boot will drop to a shell:
> rtk network on
> setenv ipaddr <address of tftp server>
> tftp $(freemem) <name-of-initramfs-image.bin>
> bootm
Then flash the -sysupgrade using either the commandline or luci.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
[gpio-led node names, OpenWrt and LuCI capitalization in commit message]
Signed-off-by: Sander Vanheule <sander@svanheule.net>
