Panasonic Switch-M8eG (PN28080K)

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Panasonic ES Networks 8 Port L2 Switching Hub
3rd Party Firmware
dd-wrt Status Unknown
OpenWrt Supported
Tomato any flavor Incompatible
Gargoyle Status Unknown
Platform
Brand • Model • Rev Panasonic Switch-M8eG
Model part number PN28080K
CPU1 checkY Realtek RTL8380M
CPU1 Type MIPS 4KEc
CPU1 Speed 500 MHz
Flash1 Chip Macronix MX25L25635FMI-10G
Flash1 Size 32 MiB 33,554,432 B <br />262,144 Kib <br />32,768 KiB <br />256 Mib <br />0.0313 GiB <br /> (SPI NOR)
RAM1 Size 128 MiB 134,217,728 B <br />1,048,576 Kib <br />131,072 KiB <br />1,024 Mib <br />0.125 GiB <br /> (DDR3)
RAM1 Chip Winbond W631GG8KB-15
ETH chip1 Realtek RTL8380M
ETH chip2 Realtek RTL8218B
Switch Realtek RTL8380M
Ethernet Port Count 8-1GbE
Ethernet connector 8P8C
Wired Standard IEEE 802.3i/3u/3ab
Auto-MDIX supported
Jumbo frame yes
Switch Class managed

Ethernet OUI: none specified

Expansion IF types SFP
SFP ports 1
Stock bootloader U-Boot
Power 100-240 VAC ~ 50/60 Hz, 0.5 A
Connector type C13
Serial Port (UART) yes, RJ45 console, 15V TTL, (9600 8N1)
3rd Party Firmware Support OpenWrt • (List | Dev | DLs)
Retail
ASIN B01BHO64UW
 Switch brandSwitch2 brand
Panasonic Switch-M16eG (PN28160K)Realtek
Panasonic Switch-M24eG (PN28240K)Realtek
Panasonic Switch-M48eG (PN28480K)Realtek
Panasonic Switch-M8eG (PN28080K)Realtek

For a list of all currently documented Realtek chipsets with specifications, see Realtek.

For a list of all currently documented Panasonic devices with specifications, see Panasonic.

Overview

Specification

  • SoC: Realtek RTL8380M
  • Flash: Macronix MX25L25635FMI-10G (32MB, SPI NOR)
  • RAM: Winbond W631GG8KB-15 (128MB, DDR3)
  • Ethernet: 8x 1GbE ports, 1x SFP slot
Ports 1-8: TP, RTL8218B (PHY)
Port 9: SFP, RTL8380M (SoC)
  • UART: RS-232 port on the front panel (RJ-45)
Pin: 3:TX, 4:GND, 5:GND, 6:RX (RJ-45) 9600N8
  • Power: 100-240 VAC, 50/60 Hz, 0.5 A
Plug: IEC 60320-C13
  • Stock OS: VxWorks based
  • LEDs/Keys: 7x / 1x

Links of Interest

Flashing

Flashing OpenWrt

Target: realtek
Subtarget: rtl838x
Package architecture: mips_4kec
Supported Since Commit
Support started version: 22.03.0
Current supported version: 25.12.1
LAN Hardware: Realtek RTL8380M
WLAN Hardware: none
WLAN Comment: No WLAN
Installation method(s):
see git-commit
git • >> 
realtek: add support for Panasonic Switch-M8eG PN28080K
Panasonic Switch-M8eG PN28080K is a 8 + 1 port gigabit switch, based on
RTL8380M.

Specification:

- SoC		: Realtek RTL8380M
- RAM		: DDR3 128 MiB (Winbond W631GG8KB-15)
- Flash		: SPI-NOR 32 MiB (Macronix MX25L25635FMI-10G)
- Ethernet	: 10/100/1000 Mbps x8 + 1
  - port 1-8	: TP, RTL8218B (SoC)
  - port 9	: SFP, RTL8380M (SoC)
- LEDs/Keys	: 7x / 1x
- UART		: RS-232 port on the front panel (connector: RJ-45)
  - 3:TX, 4:GND, 5:GND, 6:RX (pin number: RJ-45)
  - 9600n8
- Power		: 100-240 VAC, 50/60 Hz, 0.5 A
  - Plug	: IEC 60320-C13
- Stock OS	: VxWorks based

Flash instruction using initramfs image:

1.  Prepare the TFTP server with the IP address 192.168.1.111
2.  Rename the OpenWrt initramfs image to "0101A8C0.img" and place it to
    the TFTP directory
3.  Download the official upgrading firmware (ex: pn28080k_v30000.rom)
    and place it to the TFTP directory
4.  Boot M8eG and interrupt the U-Boot with Ctrl + C keys
5.  Execute the following commands and boot with the OpenWrt initramfs
    image

    rtk network on
    tftpboot 0x81000000
    bootm

6.  Backup mtdblock files to the computer by scp or anything and reboot
7.  Interrupt the U-Boot and execute the following commands to re-create
    filesystem in the flash

    ffsmount c:/
    ffsfmt c:/

    this step takes a long time, about ~ 4 mins

8.  Execute the following commands to put the official images to the
    filesystem

    updatert <official image>

    example:

      updatert pn28080k_v30000.rom

    this step takes about ~ 40 secs

9.  Set the environment variables of the U-Boot by the following commands

    setenv loadaddr 0xb4e00000
    setenv bootcmd bootm
    saveenv

10: Download the OpenWrt initramfs image and boot with it

    tftpboot 0x81000000 0101A8C0.img
    bootm

11: On the initramfs image, download the sysupgrade image and perform
    sysupgrade with it

    sysupgrade <imagename>

12: Wait ~ 120 seconds to complete flashing

Note:

- "Switch-M8eG" is a model name, and "PN28080K" is a model number.
  Switch-M8eG has an another (old) model number ("PN28080"), it's not a
  Realtek based hardware.

- Switch-M8eG has a "POWER" LED (Green), but it's not connected to any
  GPIO pin.

- The U-Boot checks the runtime images in the flash when booting and
  fails to execute anything in "bootcmd" variable if the images are not
  exsisting.

- A filesystem is formed in the flash (0x100000-0x1DFFFFF) on the stock
  firmware and it includes the stock images, configuration files and
  checksum files. It's unknown format, can't be managed on the OpenWrt.
  To get the enough space for OpenWrt, move the filesystem to the head
  of "fs_reserved" partition by execution of "ffsfmt" and "updatert".

- On the other devices in the same series of Switch-M8eG PN28080K, the
  INT pin on the PCA9555 is not connected to anywhere.

Back to the stock firmware:

1. Delete "loadaddr" variable and set "bootcmd" to the original value

   on U-Boot:

     setenv loadaddr
     setenv bootcmd 'bootm 0x81000000'

   on OpenWrt:

     fw_setenv loadaddr
     fw_setenv bootcmd 'bootm 0x81000000'

2. Perform reset or reboot

  on U-Boot:

    reset

  on OpenWrt:

    reboot

See also

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