SheevaPlug USB, MMC, network failures after u-boot upgrade

Hi,

I found a SheevaPlug at home I haven't used for many years. As a first step I wanted to install an actual, fresh operation system.

So I used the manual https://www.cyrius.com/debian/kirkwood/sheevaplug/install/ from Martin Michlmayr. As a first step a had to upgrade u-boot. I strictly

followed https://www.cyrius.com/debian/kirkwood/sheevaplug/uboot-upgrade/ and installed the matching binary ("SheevaPlug") via USB stick.

After a reboot the new version is shown:

```

=> version

U-Boot 2019.01+dfsg-7 (May 14 2019 - 02:07:44 +0000)

Marvell-Sheevaplug

gcc (Debian 8.3.0-7) 8.3.0

GNU ld (GNU Binutils for Debian) 2.31.1

```

Now I wanted to start the installer and stored the uImage and uInitrd file on

the same USB stick.

```

=> usb start

starting USB...

USB0: USB EHCI 1.00

scanning bus 0 for devices... EHCI timed out on TD - token=0x80008d80

EHCI timed out on TD - token=0x80008c80

ERROR: NOT USB_CONFIG_DESC b1

EHCI timed out on TD - token=0x80008d80

EHCI timed out on TD - token=0x80008c80

2 USB Device(s) found

scanning usb for storage devices... 0 Storage Device(s) found

```

Next, I tried some SD cards:

```

=> mmc info

Device: MVEBU_MMC

Manufacturer ID: 2

OEM: 544d

Name: SD02G

Bus Speed: 25000000

Mode : SD Legacy

Rd Block Len: 512

SD version 1.10

High Capacity: No

Capacity: 1.9 GiB

Bus Width: 1-bit

Erase Group Size: 512 Bytes

=> mmc list

MVEBU_MMC: 0 (SD)

=> mmc part

## Unknown partition table type 0

```

My Mac shows me a working partion table:

```

fdisk /dev/disk2

Disk: /dev/disk2 geometry: 975/64/63 [3932160 sectors]

Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: 06 0 4 4 - 975 15 15 [ 255 - 3931905] DOS > 32MB

2: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

3: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

4: 00 0 0 0 - 0 0 0 [ 0 - 0] unused

```

Next, I tried via network:

```

=> setenv serverip 192.168.99.21

=> setenv ipaddr 192.168.99.7

=> ping 192.168.99.21

Using egiga0 device

```

There's no more output, the box got stuck.

Ok, pinging doesn't work but TFTP?

```

=> tftpboot 0x00800000 uImage

Using egiga0 device

TFTP from server 192.168.99.21; our IP address is 192.168.99.7

Filename 'uImage'.

Load address: 0x800000

Loading: *

```

Again, the box got stuck.

Did I brick my SheevaPlug?

How can I downgrade the bootloader without USB, MMC and network?

Thanks for your help,

Flo