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Date: Thu, 07 Aug 2008 10:30:00 -0400
From: Jason <gentoo@lakedaemon.net>
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Subject: Re: [gentoo-embedded] FTDI jtag
References: <4898C24E.5060306@bucknall.me.uk>
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billium wrote:
> Has anybody got a usb jtag working in Gentoo, who could give me some 
> handy tips.
> 
> The device I have is an Amotec JTAGkey-Tiny which is based on a FTDI 
> FT2232 USB device.

I use a similar device based on the same chip.

> I have tried to follow the Amotec documentation, but is oldish and not 
> completely logical.
> 
> It all works on WinXP (using VirtualBox) but as it uses gdb I would like 
> to use Gentoo only.

The following works for me:

~
[jason@phoenix] $  find /lib/modules/`uname -r`/ -name "*ftdi*"
/lib/modules/2.6.26/kernel/drivers/usb/serial/ftdi_sio.ko
~
[jason@phoenix] $ grep -rni ftdi /usr/src/linux/.config
1693:CONFIG_USB_SERIAL_FTDI_SIO=m
1754:# CONFIG_USB_FTDI_ELAN is not set

It should auto-load when you plug the cable in.  Then udev will create 
/dev/ttyUSB0 .

hth,

Jason.