I have been running a build compiled from the github/gl-inet/openwrt sources without much fuss. It is a minimal openwrt with no LuCI, no storage kmods, just dropbear and wireless access point. After a few reboots, the router does not fully come back online.
My serial adapter is able to receive data from the AR750S uart but it cannot transmit any data to the AR750S - so I’m unable to interact with U-Boot or serial console in OpenWrt. I have confirmed that my serial adapter is working on other devices, but not the AR750S.
I am able to flash factory images through the U-Boot web interface and get the router back to working order, but it takes multiple attempts because the ethernet device resets and the device freezes while flashing.
Noticed that the NAND is already reporting a bad block? Also noticed it gets abnormally hot.
My AR750S was one of the earliest pre-ordered and I am worried I might have gotten a defective unit?
U-Boot 1.1.4-ga35cd45d-dirty (Jun 22 2018 - 12:48:24) ar750s - Dragonfly 1.0DRAM: sri ath_ddr_initial_config(278): (ddr2 init) ath_sys_frequency: cpu 775 ddr 650 ahb 258 Tap values = (0xf, 0xf, 0xf, 0xf) 128 MB Flash Manuf Id 0xef, DeviceId0 0x40, DeviceId1 0x18 flash size 16MB, sector count = 256 *** Warning - bad CRC, using default environment Power up PLL with outdiv = 0 then switch to 3 ath_gmac_enet_initialize... No valid address in Flash. Using fixed address ath_gmac_enet_initialize: reset mask:c02200 athr_mgmt_init ::done Dragonfly ----> S17 PHY * athrs17_reg_init: complete SGMII in forced mode athr_gmac_sgmii_setup SGMII done : cfg1 0x80000000 cfg2 0x7114 eth0: 00:03:7f:09:0b:ad eth0 up eth0 Qualcomm Atheros SPI NAND Driver, Version 0.1 (c) 2014 Qualcomm Atheros Inc. MFR:200,DID:177 ====== NAND Parameters ====== sc = 0x87ff6230 page = 0x800 block = 0x20000 Setting 0x181162c0 to 0x4b962100 Hit 'gl' to stop autoboot: 0 Device 0 bad blocks: 07fe0000 Found ART,Checking calibration status... Device have calibrated,Checking device test status... Device have tested,Checking MAC address... Device have MAC address,Checking device flash status... Device have nor and nand flash,Booting standard firmware from nor flash... Booting image at: 0x9F060000 Trying eth0 dup 1 speed 1000 Using eth0 device ping failed; host 192.168.1.2 is not alive Unknown command 'ERROR!' - try 'help' ## Booting image at 9f060000 ... Image Name: MIPS OpenWrt Linux-4.9.120