From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from moutng.kundenserver.de (moutng.kundenserver.de [212.227.126.187]) by ozlabs.org (Postfix) with ESMTP id 665C92BDEB for ; Wed, 1 Dec 2004 19:41:38 +1100 (EST) Received: from [212.227.126.160] (helo=mrelayng.kundenserver.de) by moutng.kundenserver.de with esmtp (Exim 3.35 #1) id 1CZQ3M-0006CL-00 for linuxppc-embedded@ozlabs.org; Wed, 01 Dec 2004 09:41:36 +0100 Received: from [80.135.68.198] (helo=intec-isdn.de) by mrelayng.kundenserver.de with asmtp (Exim 3.35 #1) id 1CZQ3L-0006O0-00 for linuxppc-embedded@ozlabs.org; Wed, 01 Dec 2004 09:41:35 +0100 Received: from joerg (192.168.4.32) by intec-isdn.de with MERCUR Mailserver (v4.02.30 ODAtMjMwNS00MzY0) for ; Wed, 1 Dec 2004 09:39:58 +0100 From: =?iso-8859-1?Q?J=F6rg_Huwig?= To: Date: Wed, 1 Dec 2004 09:44:55 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" In-reply-to: <20041130162456.5D24AC1430@atlas.denx.de> Message-Id: <0412010939587000@intec-isdn.de> Cc: linuxppc-embedded@ozlabs.org Subject: Re: USB driver for ISP1362 very slow List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Wolfgang, I tried different USB memory sticks but the result was always the same. Also there were no error messages in the log file.=20 After trying to understand the driver, I found two defines which seem to = be responsible for the slow transmission. In hcd-1161.c: #define ATL_DONE_DELAY 10 and in hcd-1161.h: #define ATL_BLOCK_SZ 64 with this defines the host controller handles every 11 ms one 64Byte ATL block, which of cause is very slow.=20 I have changed the ALT_BLOCK_SZ from 64 to 512 and reduced the=20 ATL_DONE_DELAY from 10 to 2. With this changes the driver works much = faster. Is it OK to change these constants in that way or could this cause = trouble? Best regards, Joerg Huwig -----Urspr=FCngliche Nachricht----- Von: wd@denx.de [mailto:wd@denx.de]=20 Gesendet: Dienstag, 30. November 2004 17:25 An: J=F6rg Huwig Cc: Linuxppc-embedded@ozlabs.org Betreff: Re: USB driver for ISP1362 very slow=20 Hello, in message <04113016200014900@intec-isdn.de> you wrote: >=20 > I'm using an ISP1362 as an USB host controller connected to a MPC880=20 > running under Linux 2.4.25. > The Driver seems to work fine as I can mount an USB memory stick.=20 > But the performance is very bad. To copy a 1MByte big file from the=20 > USB memory stick to the RAM disk takes about 3 minutes. Are there any error messages in the log files? Did you try another = USB memory stick, especially any USB 2.0 stick? > Does anyone has experience with the ISP1362 driver in Kernel 2.4.25?? Sure. We implemented it and tested it with mass storage devices, USB modems, network adapters and in combination with RNDIS on Windoze. Best regards, Wolfgang Denk -- Software Engineering: Embedded and Realtime Systems, Embedded Linux Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de "I find this a nice feature but it is not according to the documen- tation. Or is it a BUG?" "Let's call it an accidental feature. :-)" - Larry Wall in <6909@jpl-devvax.JPL.NASA.GOV>