host controllers to avoid the need to allocate any multi-page
physically contiguous memory blocks. This makes it possible to use
USB devices reliably on low-memory systems or when memory is too
fragmented for contiguous allocations to succeed.
The USB subsystem now uses bus_dmamap_load() directly on the buffers
supplied by USB peripheral drivers, so this also avoids having to
copy data back and forth before and after transfers. The ehci and
ohci controllers support scatter/gather as long as the buffer is
contiguous in the virtual address space. For uhci the hardware
cannot handle a physical address discontinuity within a USB packet,
so it is necessary to copy small memory fragments at times.
ATI EHCI controllers exhibit simmilar stall issues and require
this dropped interrupts workaround. Be verbose about it.
ehci.c:
ehcivar.h:
Slight change in comments to note about issues surrounding both
VIA and ATI EHCI controllers.
Approved by: iedowse
an interrupt appears to occur before the transfer has been marked
as completed. This caused umass transfers to get stuck, especially
when writing large files. The workaround sets up a timer that
rechecks for missed completed transfers if some operations are still
pending. Other suggested workarounds, such as performing a PCI read
immediately after acknowledging the interrupts, do not appear to
help.
Obtained from: OpenBSD
Synchronise with NetBSD upto rev 1.19:
- Allow 32 chars in the saved vendor string.
- Some NetBSD-only changes.
- Some missing parts (define, variable).
ehci_pci.c:
Add vendor ids for ATI and Philips.
Add identification strings for the following:
o ALi's M5239
o AMD 8111
o ATI SB200, SB400
o Intel 6300ESB, ICH4, ICH5, ICH7
o NVIDIA nForce 2, nForce 3, nForce 4
o Philips ISP156x
ehcireg.h:
We're at the same level as rev 1.18 from NetBSD.
usb_port.h:
NetBSD/OpenBSD specific things
Obtained from: NetBSD via DragonFly
No comment from: usb@
rather than a softc pointer (with the bus structure at the start).
This is a non-functional change. It just helps when reading the code to
know that the ehci, ohci and uhci drivers share the bus structure, not the
entire softc.
system BIOS to disable legacy device emulation as per the "EHCI
Extended Capability: Pre-OS to OS Handoff Synchronisation" section
of the EHCI spec. BIOSes that implement legacy emulation using SMIs
are supposed to disable the emulation when this procedure is performed.
this problem put these lines back in. While they should be
unnecessary, they appear to be sometimes necessary.
Reviewed in concept: dfr
Approved by: re (scottl@)
to the pci attachment. Cardbus is a derived class of pci so all pci
drivers are automatically available for matching against cardbus devices.
Reviewed by: imp
