Hi I've got some new test-results, which puzzle me more and more... I'll just quote below my message to LKML earlier today.
Thanks Guennadi --- Guennadi Liakhovetski >From [EMAIL PROTECTED] Tue May 25 19:53:15 2004 Date: Tue, 25 May 2004 15:45:45 +0200 (CEST) From: Guennadi Liakhovetski <[EMAIL PROTECTED]> To: [EMAIL PROTECTED] Subject: PCI / CardBus problems I am running out of (reasonable) ideas with this problem. The only thing I can do now is to ask help from the Highest Summit:-) Setup: an ARM PXA255 board with an IT8152 PCI companion chip and a PCI4520 cardbus controller. Kernel 2.4.21 (sorry...) A couple of devices on PCI-0: IT8152-internal USB OHCI, a RTL8139 chip, a graphics controller, and the cardbus. Problem: test 1. Run some load on USB, RTL, insert a 16-bit PCMCIA card in a cardbus slot and put some load on it - everything works. test 2. Do not load USB, RTL, insert a 32-bit CardBus card, e.g. a Xircom eth, connect to 100MBps, put load - works. test 3. Load USB, but do not put load, insert 32-bit Xircom, put load on it. Works in the beginning, but then starts losing packets, slowly becomes unusable. The higher the load - the faster it degrades. test 4. Load USB, insert a CardBus USB2.0 (EHCI + OHCI) card, insert a USB BT module in the card, configure it (hciconfig hci0 up), scan (hcitool scan), so far everything works, but first by a l2ping attempt get a BUG() in dma_to_ed_td(). Same in internal USB (OHCI too) works. Similarly, other USB devices work "partly". So, either PCI-0 alone (possibly with 16-bit PCMCIA in the cardbus), or PCI-1 alone work. Simultaneously - not. So, the question - what can it be? PCI misconfiguration? Timing? Electrical problems on the bus?... Thanks Guennadi --------------------------------- Guennadi Liakhovetski, Ph.D. DSA Daten- und Systemtechnik GmbH Pascalstr. 28 D-52076 Aachen Germany ------------------------------------------------------- This SF.Net email is sponsored by: Oracle 10g Get certified on the hottest thing ever to hit the market... Oracle 10g. Take an Oracle 10g class now, and we'll give you the exam FREE. http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
