Hi,
For developers: the latest supported version for D-Link DIR-320 B1 (https://downloads.openwrt.org/releases/21.02.1/targets/ramips/rt305x/openwrt-21.02.1-ramips-rt305x-dlink_dir-320-b1-squashfs-sysupgrade.bin) does not work after flashing:
U-Boot 1.1.3 (Mar 31 2011 - 13:19:43)
Board: Ralink APSoC DRAM: 32 MB
rt2880 uboot v0.00e04 05/25/2006
SERIAL_CLOCK_DIVISOR =16
kaiker,,CONFIG_BAUDRATE =57600
SDRAM SIZE:02000000
Top of RAM usable for U-Boot at: 82000000
Reserving 319k for U-Boot at: 81fb0000
Reserving 260k for malloc() at: 81f6f000
Reserving 44 Bytes for Board Info at: 81f6efd4
Reserving 36 Bytes for Global Data at: 81f6efb0
Reserving 128k for boot params() at: 81f4efb0
Stack Pointer at: 81f4ef98
relocate_code Pointer at: 81fb0000
Now running in RAM - U-Boot at: 81fb0000
monitor_flash_len =124244
Command "rf": 0x80202578 => 0x81fb2578
Command "mdio": 0x8020a794 => 0x81fba794
Command "erase": 0x8020bf78 => 0x81fbbf78
Command "cp": 0x8020be4c => 0x81fbbe4c
Command "reset": 0x802181b0 => 0x81fc81b0
Command "go": 0x8020ceb0 => 0x81fbceb0
Command "bootm": 0x8020d68c => 0x81fbd68c
Command "loadb": 0x8020e4e4 => 0x81fbe4e4
Command "tftpboot": 0x8020eb48 => 0x81fbeb48
Command "httpd": 0x8020eb30 => 0x81fbeb30
Command "saveenv": 0x8020fb5c => 0x81fbfb5c
Command "setenv": 0x8020fa10 => 0x81fbfa10
Command "printenv": 0x8020f024 => 0x81fbf024
Command "?": 0x8020fd10 => 0x81fbfd10
Command "help": 0x8020fd10 => 0x81fbfd10
Command "version": 0x8020fbb0 => 0x81fbfbb0
Command "mw": 0x80212c88 => 0x81fc2c88
Command "nm": 0x80212e9c => 0x81fc2e9c
Command "mm": 0x80212ee4 => 0x81fc2ee4
Command "md": 0x802129b8 => 0x81fc29b8
spi_wait_nsec: 42
spi device id: ef 40 17 0 0 (40170000)
find flash: W25Q64BV
raspi_read: from:30000 len:1000
.raspi_read: from:30000 len:1000
.Before: 3000
reg 2000
After: 3000
============================================
Ralink UBoot Version: 3.5.2.0
--------------------------------------------
ASIC 5350_MP (Port5<->None)
DRAM_CONF_FROM: Boot-Strapping
DRAM_TYPE: SDRAM
DRAM_SIZE: 256 Mbits
DRAM_WIDTH: 16 bits
DRAM_TOTAL_WIDTH: 16 bits
TOTAL_MEMORY_SIZE: 32 MBytes
Flash component: SPI Flash
Date:Mar 31 2011 Time:13:19:43
============================================
icache: sets:256, ways:4, linesz:32 ,total:32768
dcache: sets:128, ways:4, linesz:32 ,total:16384
##### The CPU freq = 360 MHZ ####
estimate memory size =32 Mbytes
raspi_read: from:40004 len:6
.
Please choose the operation:
1: Load system code to SDRAM via TFTP.
2: Load system code then write to Flash via TFTP.
3: Boot system code via Flash (default).
4: Entr boot command line interface.
7: Load Boot Loader code then write to Flash via Serial.
9: Load Boot Loader code then write to Flash via TFTP.
0
3: System Boot system code via Flash.
## Booting image at bc050000 ...
raspi_read: from:50000 len:40
. Image Name: MIPS OpenWrt Linux-5.4.154
Created: 2021-10-24 9:01:35 UTC
Image Type: MIPS Linux Kernel Image (lzma compressed)
Data Size: 1497193 Bytes = 1.4 MB
Load Address: 80000000
Entry Point: 80000000
raspi_read: from:50040 len:16d869
....................... Verifying Checksum ... OK
Uncompressing Kernel Image ... LZMA ERROR 1 - must RESET board to recover
U-Boot 1.1.3 (Mar 31 2011 - 13:19:43)
We tested that the earlier version (https://downloads.openwrt.org/releases/19.07.8/targets/ramips/rt305x/openwrt-19.07.8-ramips-rt305x-dir-320-b1-squashfs-sysupgrade.bin) still works.