USB Hotplug support and use

["Robbie" <sheriff@xxxxxxxxxx>]

Hi All,

I figure the arm list might give me a better understanding of the

usb<->hotplug<->automatic update stuff than the hotplug list so here goes...



I believe my problem lies in what's incorperated in the kernel and how

it's used.

I have a EB9315 and an LPD7A404 board. In the 9315 there is a config

option for the USB hotplug, but in the 7A404 it does not.

However, in either case, I do get a log message when the usb flash

drive is connected and disconnected. 

My filesystem does not have udev and my intension is to write a script

that will mount /dev/sda1 once a usb mem. stick is detected and update

my local NOR flash after that.

I've mounted /proc/bus/usb and /dev/sda1 suscessfully - and manually -

but I'm not sure what signals to use to do it automatically. Therefore, my questions are:

Are both of these boards configured to use /sbin/hotplug script to do

automatic configuration?

In both case, once a usb device (flash drive in this case) is detected

is the /sbin/hotplug called automatically? (This applies mostly to the

7A404).

What signals are available to the user to detect a usb device

connected or how to use them.

I get some of this from the kernel documentation usb/hotplug.txt and 

usb/proc_usb_info.txt but it's not clear to me how to go about using

this info.

Does anyone have an example script they don't mind sharing?





Thanks a million.

--Robbie









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