From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 20 Mar 2007 15:32:33 +0000 (GMT) Received: from h155.mvista.com ([63.81.120.155]:40421 "EHLO imap.sh.mvista.com") by ftp.linux-mips.org with ESMTP id S20022185AbXCTPcb (ORCPT ); Tue, 20 Mar 2007 15:32:31 +0000 Received: from [192.168.1.248] (unknown [10.150.0.9]) by imap.sh.mvista.com (Postfix) with ESMTP id 6C1C33ED2; Tue, 20 Mar 2007 08:31:52 -0700 (PDT) Message-ID: <45FFFE8B.1010806@ru.mvista.com> Date: Tue, 20 Mar 2007 18:32:27 +0300 From: Sergei Shtylyov Organization: MontaVista Software Inc. User-Agent: Mozilla/5.0 (X11; U; Linux i686; rv:1.7.2) Gecko/20040803 X-Accept-Language: ru, en-us, en-gb MIME-Version: 1.0 To: Marco Braga Cc: linux-mips@linux-mips.org Subject: Re: Au1500 and TI PCI1510 cardbus References: <200703200204.l2K24WgH020041@centurysys.co.jp> <45FFEDED.6060708@ru.mvista.com> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 14588 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: sshtylyov@ru.mvista.com Precedence: bulk X-list: linux-mips Marco Braga wrote: > 2007/3/20, Sergei Shtylyov : >> What I don't understand is why use USB card on CardBus, if the Au1500 >> datasheet clearly tells us (well, at least me :-) that this is *not* >> going to work? > I'll reply for my part: we need something hotswappable, and support for > wifi. The first idea was to use cardbus, so a board was built using > PCI1510. > When the system was projected, USB2.0 was not easy to find (if even > existed) > and almost every wifi card was PCMCIA or Cardbus. The PCI1510 never worked, > and it seems now that never will. So at the moment an alternative is to try > a wifi dongle on USB. USB 1.x was too slow, but USB 2.0 seems ok for our > application. Au1500 does not support USB2.0, so I am looking for a > PCI/USB2.0 controlles. Does something similar exist? Does it work on > Au1500? Well, it all should be working fine in the board's own PCI slots, i.e. on the primary PCI bus. > To make it short, we are NOT trying to make USB work on Cardbus, but to use > either cardbus OR usb. :-) > From what you've told me cardbus on PCI (being a bridge) cannot work with > AU1500's PCI device. So the next idea is to try an USB controller on PCI. > Will it work? Well, I'm hoping for some fresh hand advice on this. Yes, this should work. > Now Takeyoshi tells me that he's using both USB2.0 and Cardbus (not USB on > Cardbus), so this seems interesting. I still think that USB is the best way From what I saw his USB is not on the primary bus, so he's taking the mentioned risks. > to go, but still a working PCI to Cardbus controller can be interesting. > But > I don't know how he's managed to make it work, since from what you have > told > me it should not work. The layout of his PCI busses is not clear from lspci's dump he's cited but his USB is clearly in the "risk zone". > Perhaps he's not using Cardbus devices but PCMCIA. It's not me -- it's written in the publicly available datasheet (spec. update I have just has more details :-) WBR, Sergei