Add support for Datto L8, E24v3, E48 switches

hmartin · November 30, 2025, 10:05am

I was digging around the firmware and GPL source code to try and find out how the fans are initialised. modsqfs/lib/modules/2.6.19/kernel/drivers/net/switch/board/board.ko seems likely as it contains some fan-related strings:

$ strings ./modsqfs/lib/modules/2.6.19/kernel/drivers/net/switch/board/board.ko | grep -i fan
Detect fan failed.
Fan has recovered

But this module isn’t GPL licensed and wasn’t included in the Datto GPL archive:

filename:       ./modsqfs/lib/modules/2.6.19/kernel/drivers/net/switch/board/board.ko
license:        Realtek Semiconductor Corp.
description:    Switch Board Vendor Module
depends:        ski,rtcore,rtk
vermagic:       2.6.19 preempt mod_unload MIPS32_R1 32BIT

Not that helpful, but while I was digging around the source code I found comments from Senao:

github.com/halmartin/avalon-l2switch-realtek-rtk8382

u-boot-2011.12/arch/mips/cpu/mips4kec/rtl838x/soc_init_parameters.c

5fe8e8b63


      
          	.header_ver  = SOC_HEADER_VERSION,
          	.header_type = (FIHT_NORMAL |
          	                ((OTTO_DRAM_GEN) << (FIHT_DRAMCTRL_SHIFT)) |
          	                ((OTTO_PLL_GEN)  << (FIHT_PLL_SHIFT)) |
          	                (OTTO_NAND_FLASH ? (FIHT_NAND|FIHT_PARALLEL) : 0) |
          	                (OTTO_NOR_SPI_FLASH ? (FIHT_NOR|FIHT_SPI) : 0)),
          
          	.spare_headers = (spare_header_p)spare_headers_in_flash,
          
          	.flash_info = {
          #if 0    /*SENAO, huse, EGS7252P using 32MB SPI flash*/
          		#include <NOR_SPI_F_MXIC_MX25L12835F_DIO.h>
          #else
          		#include <NOR_SPI_F_MXIC_MX25L25635F_32MB_3BCMD_DIO.h>
          #endif
          	},
          
          	.layout = {
          		.bootloader1_addr = 0x00009000,
          		.bootloader2_addr = 0x00000000,
          		.kernel1_addr = 0x00100000,

Speculation: It looks like the EnGenius EWS5912FP is the same Realtek reference design as the OMS 8/Datto E8. They have the same LEDs and LED Mode/reset button placement, and the same port layout. (Photos are from eBay listings)

The EnGenius EGS7228P is probably an RTL8382M_8218B, and the EnGenius EGS7252FP is probably RT8393M.

All this is pure speculation, I don’t own (and don’t plan to buy) those models, but just thought I’d leave it here for the next person to run across it.

RaylynnKnight · December 1, 2025, 2:56am

I have a photo of the EnGenius EWS5912FP on the entry at WikiDevi and it does appear very similar. The boards do have different Board ID but they are from the same manufacturer.