In message <[EMAIL PROTECTED]>, Holger Kipp writes:
>Problem still exists with the latest 6.1-PRERELEASE - build
>just finished (FreeBSD 6.1-PRERELEASE #11: Sun Feb 26 00:56:42 CET 2006).
>
>scanimage will remain in state uscnrb.
>
>Help and suggestions welcome!
One change that went in since Feb 13th was removing code that clears
USB endpoint stalls every time a pipe is opened. It's possible that
this is causing problems with the USB "data toggle" value not being
set correctly, since a side-effect of clearing stalls is to reset
the device's idea of the correct toggle value.
You could try the following patch on the off-chance that it helps -
unfortunately I haven't found any devices that exibit this problem
yet, so I can't tell if this patch actually does what it should.
Ian
Index: ehci.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/ehci.c,v
retrieving revision 1.36.2.1
diff -u -r1.36.2.1 ehci.c
--- ehci.c 26 Jan 2006 01:43:13 -0000 1.36.2.1
+++ ehci.c 25 Feb 2006 23:54:55 -0000
@@ -1390,7 +1390,7 @@
if (sc->sc_dying)
return (USBD_IOERROR);
- epipe->nexttoggle = 0;
+ epipe->nexttoggle = pipe->endpoint->savedtoggle;
if (addr == sc->sc_addr) {
switch (ed->bEndpointAddress) {
@@ -2479,6 +2479,8 @@
ehci_rem_qh(sc, sqh, head);
splx(s);
ehci_free_sqh(sc, epipe->sqh);
+
+ pipe->endpoint->savedtoggle = epipe->nexttoggle;
}
/*
Index: ohci.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/ohci.c,v
retrieving revision 1.154.2.2
diff -u -r1.154.2.2 ohci.c
--- ohci.c 29 Jan 2006 01:26:46 -0000 1.154.2.2
+++ ohci.c 25 Feb 2006 23:55:31 -0000
@@ -2161,7 +2161,9 @@
(dev->speed == USB_SPEED_LOW ? OHCI_ED_SPEED : 0) |
fmt |
OHCI_ED_SET_MAXP(UGETW(ed->wMaxPacketSize)));
- sed->ed.ed_headp = sed->ed.ed_tailp = htole32(tdphys);
+ sed->ed.ed_headp = htole32(tdphys |
+ (pipe->endpoint->savedtoggle ? OHCI_TOGGLECARRY : 0));
+ sed->ed.ed_tailp = htole32(tdphys);
switch (xfertype) {
case UE_CONTROL:
@@ -2247,6 +2249,8 @@
/* Make sure the host controller is not touching this ED */
usb_delay_ms(&sc->sc_bus, 1);
splx(s);
+ pipe->endpoint->savedtoggle =
+ (le32toh(sed->ed.ed_headp) & OHCI_TOGGLECARRY) ? 1 : 0;
ohci_free_sed(sc, opipe->sed);
}
Index: uhci.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/uhci.c,v
retrieving revision 1.162
diff -u -r1.162 uhci.c
--- uhci.c 29 May 2005 04:42:27 -0000 1.162
+++ uhci.c 25 Feb 2006 23:58:05 -0000
@@ -2031,6 +2031,7 @@
uhci_softc_t *sc = (uhci_softc_t *)dev->bus;
uhci_free_sqh(sc, upipe->u.bulk.sqh);
+ pipe->endpoint->savedtoggle = upipe->nexttoggle;
}
usbd_status
@@ -2915,7 +2916,7 @@
ed->bEndpointAddress, sc->sc_addr));
upipe->aborting = 0;
- upipe->nexttoggle = 0;
+ upipe->nexttoggle = pipe->endpoint->savedtoggle;
if (pipe->device->address == sc->sc_addr) {
switch (ed->bEndpointAddress) {
Index: usb_subr.c
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/usb_subr.c,v
retrieving revision 1.76.2.2
diff -u -r1.76.2.2 usb_subr.c
--- usb_subr.c 15 Feb 2006 22:51:08 -0000 1.76.2.2
+++ usb_subr.c 25 Feb 2006 23:58:36 -0000
@@ -514,6 +514,7 @@
}
}
ifc->endpoints[endpt].refcnt = 0;
+ ifc->endpoints[endpt].savedtoggle = 0;
p += ed->bLength;
}
#undef ed
Index: usbdivar.h
===================================================================
RCS file: /dump/FreeBSD-CVS/src/sys/dev/usb/usbdivar.h,v
retrieving revision 1.43
diff -u -r1.43 usbdivar.h
--- usbdivar.h 6 Jan 2005 01:43:29 -0000 1.43
+++ usbdivar.h 25 Feb 2006 23:58:40 -0000
@@ -51,6 +51,7 @@
struct usbd_endpoint {
usb_endpoint_descriptor_t *edesc;
int refcnt;
+ int savedtoggle;
};
struct usbd_bus_methods {
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