[U-Boot-Users] usb storage return value is always true

Aras Vaichas
2008-03-19T01:56:59Z

I'm using U-Boot 1.3.2 with AT91RM9200 custom board (based on DK)

At boot time I want to detect that a USB storage device has been
inserted, and then I want to attempt to load an image off it and upgrade
my system.

If I run "usb storage" it always returns 0 - even if there is no USB
storage device inserted. If I run fatload on a non-existent device, it
has a very long timeout period.

e.g.

U-Boot> usb start
(Re)start USB...
USB: scanning bus for devices... 1 USB Device(s) found
scanning bus for storage devices... 0 Storage Device(s) found
U-Boot> usb storage; echo $?
No storage devices, perhaps not 'usb start'ed..?
0
U-Boot> usb start
(Re)start USB...
USB: scanning bus for devices... 2 USB Device(s) found
scanning bus for storage devices... 1 Storage Device(s) found
U-Boot> usb storage; echo $?
Device 0: Vendor: Prod.: Rev: PMAP
Type: Removable Hard Disk
Capacity: 245.5 MB = 0.2 GB (502784 x 512)
0

Is there a way to detect if a USB storage device has been inserted?

Aras

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