armedTiger / u-boot-marvell-db5xe

Marvell Armada 385 (mv88f6820-db5xe) U-Boot (BIOS + bootloader) support

BIOS + Bootloader for Marvell 6820-db51e

This is the modified version of the Marvell 6820 board bring-up package (boot only). The targeted development board has 2 Gigabits Ethernet PHYs, 1 Gigabits Switch (5/7-port), 1 30G SSD (local-config:log) with 1 128M SPI-Flash (3B mode ROM boot, 4B mode R/W, header:u-boot:env:os1:os2:default-config) and 1 Dual-Band Wireless Radio (802.11bgn)

Things supported so far

1. 2 x PHYs (eth1, eth2)
2. 1 x Switch (eth0 and switch ports 1-5)
3. 1 x SSD
4. 1 x SPI-Flash
5. 1 x Wifi

Things needs soft reset

1. SPI-Flash, back to 3B before u-boot reset (not yet) and os reboot (done);
2. Wifi, pci-E reset in board header before u-boot init; (not yet)
3. PHYs and Switch, reset in u-boot init (done);

Note that, if you unplug the power cord, it is a hard reset. You don't need the above resets.

Hack it open

0. Invalid bit 0-8 on the SPI-Flash (ROM hard wired to read this as valid boot device record)
1. Trigger rescue boot-squence (see /tools/marvell/doimage_mv/pattern.py)
2. Use modified xmodem over serial port to upload boot firmware (header:u-boot:env).
3. Use dnsmasq with TFTP for uploading os(kernel), devicetree and initramfs.

Develop

1. /tools/marvell/bin_hdr/src_phy/ -- board SERDES Lanes topology (header:)
2. /board/mv_ebu/a38x/armada_38x_family/boardEnv/ -- board init hooks implementation (:u-boot:)
3. /drivers/mtd/spi/ -- SPI-Flash 4B mode support (for upgrading this header:u-boot:)

###Extra you need

1. defconfig for buildroot (userland daemon and utils)
2. defconfig for kernel (drivers)
3. .dts device tree definition for kernel (dtb)
4. local.mk for buildroot to use customized kernel, this u-boot package and more userland daemon/utils

Note: the only place you have to modify in the kernel is descripted in the .dts (SPI-Flash 4B to 3B reset upon reboot)

Debug

###Console

sudo minicom -D /dev/ttyS0 -b 115200
sudo minicom -D /dev/ttyUSB0 -b 115200

License

Copyright 2016 Tim Lauv. Under the GPL v2 License.