-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday 20 October 2003 12:12 am, David Brownell wrote: > No, IPR is set _implicitly_ when the FIFO fills ... that's > why it's only set _explicitly_ to send short packets. See the > UDC spec; you just made it send a full packet (16 bytes) followed > by a ZLP. Which the host sees as a failed read (too short), and > that's what causes the reset. (That's typical for device side > controllers.)
Interesting.. The UDC docs say for me that I need to set it to send the first packet... And once I removed the printk's, I no longer had the resetting issue. > I seem to recall that IPR is wierd in various ways though. > Isn't that the bit that you can't read -- but which, when the > host clears it, you get an IRQ? So if there's an IRQ that > doesn't have any obvious source, you've got to conclude it > was IPR clearing. Right. > Not conducive to robust behavior, and > it's one of the things that's made me avoid touching any > of the IRQ/PIO code since it seemed to fall "into the groove" > and behave in all the regression tests. I'm telling you, whoever designed the UDC must've had obsessive-compulsive disorder... "Is the packet there yet? Yet? How about now? *pokepokepokepoke*" "YES IT'S THERE!" ".. oh, ok. Can I send it yet? Yet? How about now?" .... > I'll have to see if the 2.6.0-test8-rmk1 patch works for me; > there are so many missing PXA drivers that all I can really > test on 2.6 is booting on NFS-over-Ether-over-USB, which works > just fine (even with DMA!), at least on a PXA255. Aiee, heh... Anyway, handhelds.org CVS seems to "work". Well, except for that, uh, issue where, uh, OUT packets in bulk just stopped working. But I'll debug that Soon. :) > - Dave /joshua - -- Joshua Wise | www.joshuawise.com GPG Key | 0xEA80E0B3 Quote | <lilo> I akilled [EMAIL PROTECTED] by mistake -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (GNU/Linux) iD8DBQE/k2EMPn9tWOqA4LMRAtofAJ0bYVVvQvARDc2V8ONblzYNptB6EQCfYbJo 5rw4Qz76Zw9kNC05ebLgiaQ= =qh0N -----END PGP SIGNATURE----- ------------------------------------------------------- This SF.net email sponsored by: Enterprise Linux Forum Conference & Expo The Event For Linux Datacenter Solutions & Strategies in The Enterprise Linux in the Boardroom; in the Front Office; & in the Server Room http://www.enterpriselinuxforum.com _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
