From: Greg KH <gregkh@suse.de>
To: "Lu, Yinghai" <yinghai.lu@amd.com>
Cc: ebiederm@xmission.com, Peter Stuge <stuge-linuxbios@cdy.org>,
linux-usb-devel@lists.sourceforge.net,
Stefan Reinauer <stepan@coresystems.de>,
linux-kernel@vger.kernel.org, linuxbios@linuxbios.org,
Andi Kleen <ak@suse.de>, David Brownell <david-b@pacbell.net>
Subject: Re: [LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.
Date: Thu, 7 Dec 2006 23:14:37 -0800 [thread overview]
Message-ID: <20061208071437.GA23173@suse.de> (raw)
In-Reply-To: <5986589C150B2F49A46483AC44C7BCA49072A5@ssvlexmb2.amd.com>
On Thu, Dec 07, 2006 at 07:48:17PM -0800, Lu, Yinghai wrote:
> With Greg's USB Debug, host and target can talk.
> target with console=ttyUSB0,115200n8
Ugh, no, never use the usb-serial driver as a console device.
That was a bad hack done as a bet many years ago. For many obvious
reasons it does not work well.
> host with cat /dev/ttyUSB0
> But if use minicom in host, it will not show '\r', I guess the usb debug
> cable eat return char. Greg, Can you add that back in usb_debug by
> replacing '\n' with '\r', '\n'?
The usb-serial console code should handle this, I thought we fixed it a
while ago.
But this kind of interface is not what these devices are good for. They
are for the debug port information, not as a usb-serial console device.
Otherwise they are way too expensive of a device...
thanks,
greg k-h
next prev parent reply other threads:[~2006-12-08 7:15 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-08 3:48 Lu, Yinghai
2006-12-08 7:14 ` Greg KH [this message]
2006-12-08 8:52 ` Yinghai Lu
2006-12-08 7:42 ` Eric W. Biederman
2006-12-08 8:53 ` Yinghai Lu
2006-12-08 9:07 ` Eric W. Biederman
2006-12-13 7:00 ` Yinghai Lu
2006-12-13 7:29 ` Eric W. Biederman
2006-12-13 10:09 ` Yinghai Lu
2006-12-13 10:41 ` Yinghai Lu
-- strict thread matches above, loose matches on Subject: below --
2006-12-09 3:16 Lu, Yinghai
2006-12-09 10:54 ` Peter Stuge
2006-12-07 22:06 Lu, Yinghai
2006-12-06 21:08 Lu, Yinghai
2006-12-07 9:51 ` [LinuxBIOS] " Peter Stuge
2006-12-06 0:00 Lu, Yinghai
2006-12-05 23:29 Lu, Yinghai
2006-12-05 23:50 ` Eric W. Biederman
2006-12-06 15:31 ` Segher Boessenkool
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