diff options
Diffstat (limited to 'sys/dev/usb/uhcivar.h')
| -rw-r--r-- | sys/dev/usb/uhcivar.h | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/sys/dev/usb/uhcivar.h b/sys/dev/usb/uhcivar.h index 7c30f652b90..07c704cbbab 100644 --- a/sys/dev/usb/uhcivar.h +++ b/sys/dev/usb/uhcivar.h @@ -1,5 +1,5 @@ -/* $OpenBSD: uhcivar.h,v 1.7 2000/03/28 19:37:49 aaron Exp $ */ -/* $NetBSD: uhcivar.h,v 1.27 2000/03/25 18:02:33 augustss Exp $ */ +/* $OpenBSD: uhcivar.h,v 1.8 2000/04/14 22:50:26 aaron Exp $ */ +/* $NetBSD: uhcivar.h,v 1.28 2000/04/06 23:44:21 augustss Exp $ */ /* $FreeBSD: src/sys/dev/usb/uhcivar.h,v 1.14 1999/11/17 22:33:42 n_hibma Exp $ */ /* @@ -42,13 +42,14 @@ /* * To avoid having 1024 TDs for each isochronous transfer we introduce * a virtual frame list. Every UHCI_VFRAMELIST_COUNT entries in the real - * frame list points to a non-active TD. These, in turn, which form the + * frame list points to a non-active TD. These, in turn, form the * starts of the virtual frame list. This also has the advantage that it - * simplifies linking in/out TD/QH in the schedule. + * simplifies linking in/out of TDs/QHs in the schedule. * Furthermore, initially each of the inactive TDs point to an inactive * QH that forms the start of the interrupt traffic for that slot. * Each of these QHs point to the same QH that is the start of control - * traffic. + * traffic. This QH points at another QH which is the start of the + * bulk traffic. * * UHCI_VFRAMELIST_COUNT should be a power of 2 and <= UHCI_FRAMELIST_COUNT. */ @@ -161,8 +162,8 @@ typedef struct uhci_softc { LIST_HEAD(, uhci_intr_info) sc_intrhead; - /* Info for the root hub interrupt channel. */ - int sc_ival; /* time between root hug intrs */ + /* Info for the root hub interrupt "pipe". */ + int sc_ival; /* time between root hub intrs */ usbd_xfer_handle sc_intr_xfer; /* root hub interrupt transfer */ usb_callout_t sc_poll_handle; @@ -172,7 +173,7 @@ typedef struct uhci_softc { void *sc_powerhook; /* cookie from power hook */ void *sc_shutdownhook; /* cookie from shutdown hook */ - device_ptr_t sc_child; /* /dev/usb device */ + device_ptr_t sc_child; /* /dev/usb# device */ } uhci_softc_t; usbd_status uhci_init __P((uhci_softc_t *)); |