diff options
| -rw-r--r-- | sys/dev/usb/ehci.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/sys/dev/usb/ehci.c b/sys/dev/usb/ehci.c index ffbf2172eb4..06cc09e932c 100644 --- a/sys/dev/usb/ehci.c +++ b/sys/dev/usb/ehci.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ehci.c,v 1.24 2004/10/20 12:45:31 dlg Exp $ */ +/* $OpenBSD: ehci.c,v 1.25 2004/10/27 12:07:48 dlg Exp $ */ /* $NetBSD: ehci.c,v 1.66 2004/06/30 03:11:56 mycroft Exp $ */ /* @@ -49,20 +49,17 @@ /* * TODO: - * 1) hold off explorations by companion controllers until ehci has started. + * 1) Hold off explorations by companion controllers until ehci has started. * - * 2) The EHCI driver lacks support for interrupt isochronous transfers, so - * devices using them don't work. - * Interrupt transfers are not difficult, it's just not done. - * - * 3) The meaty part to implement is the support for USB 2.0 hubs. - * They are quite compolicated since the need to be able to do - * "transaction translation", i.e., converting to/from USB 2 and USB 1. + * 2) The meaty part to implement is isochronous transactions. They are + * needed for USB 1 devices below USB 2.0 hubs. They are quite complicated + * since they need to be able to do "transaction translation", ie, + * converting to/from USB 2 and USB 1. * So the hub driver needs to handle and schedule these things, to * assign place in frame where different devices get to go. See chapter - * on hubs in USB 2.0 for details. + * on hubs in USB 2.0 for details. * - * 4) command failures are not recovered correctly + * 3) Command failures are not recovered correctly. */ #include <sys/cdefs.h> |