According to AMD, USB 2 in amd8111 will never work.
发件人: ron minnich [mailto:email@example.com]
发送时间: 2004年5月5日 7:07
抄送: Stefan Reinauer; linuxbios(a)clustermatic.org
主题: Re: Disable USB2 in AMD8111 and remove ide hardcode io addr
On Wed, 5 May 2004, ron minnich wrote:
On Tue, 4 May 2004, YhLu wrote:
I'm going to add several lines in
amd8111_enable of amd8111.c to disable
USB2 in amd8111.
/* disable usb2 in amd 8111 because it does not work awlays*/
byte = pci_read_config8(lpc_dev, 0x47);
byte |= (1<<7);
pci_write_config8(lpc_dev, 0x47, byte);
this is the wrong way to do this, please don't do it just yet.
ok, the other two changes look fine.
This disabling is fine if the kernel can later re-enable, but I doubt the
kernel will do that. We need a way to make this usb enable/disable visible
at configuration time, so people can turn on/off as needed, unless usb2.0
on the 8111 NEVER work. I am willing to guess it will work someday, and
this built-in disable will come back to bite us.