.\"	$NetBSD: cardbus.4,v 1.24 2005/09/09 14:03:51 drochner Exp $
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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Lennart Augustsson.
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.Dd September 9, 2005
.Dt CARDBUS 4
.Os
.Sh NAME
.Nm cardbus ,
.Nm cardslot ,
.Nm cbb
.Nd CardBus driver
.Sh SYNOPSIS
.Cd "cbb*      at pci? dev? function ?"
.Cd "cardslot* at cbb?"
.Cd "cardbus*  at cardslot?"
.Cd "pcmcia*   at cardslot?"
.Cd "XX*       at cardbus? function ?"
.Sh DESCRIPTION
.Nx
provides machine-independent bus support and
drivers for CardBus devices.
.Pp
The
.Cm cbb
device represents the CardBus controller.
Each controller has a number
of slots, represented by the
.Cm cardslot
devices. A slot can have either a CardBus card or a
.Tn PCMCIA
card, which are attached with the
.Cm cardbus
or
.Cm pcmcia
devices, respectively.
.Sh SUPPORTED DEVICES
.Nx
includes the following machine-independent CardBus
drivers, sorted by function and driver name:
.Ss Network interfaces
.Bl -tag -width speaker -offset indent -compact
.It ex
3Com 3c575TX and 3c575BTX
.It fxp
Intel i8255x
.It rtk
Realtek 8129/8139
.It tlp
DECchip 21143
.El
.Ss Serial interfaces
.Bl -tag -width speaker -offset indent -compact
.It com
Modems and serial cards
.El
.Ss SCSI controllers
.Bl -tag -width speaker -offset indent -compact
.It adv
AdvanSys 1200[A,B], 9xx[U,UA]
.It ahc
Adaptec ADP-1480
.El
.Ss USB controllers
.Bl -tag -width speaker -offset indent -compact
.It ehci
Enhanced Host Controller (2.0)
.It ohci
Open Host Controller
.It uhci
Universal Host Controller
.El
.Ss IEEE1394 controllers
.Bl -tag -width speaker -offset indent -compact
.It fwohci
OHCI controller
.El
.Sh DIAGNOSTICS
.Nm cbb
devices may not be properly handled by the system BIOS on i386-family
systems.
If, on an i386-family system, the
.Nm cbb
driver reports
.Dl cbb0: NOT USED because of unconfigured interrupt
then enabling
.Bl -item -offset indent -compact
.It
.Cd options PCI_ADDR_FIXUP
.It
.Cd options PCI_BUS_FIXUP
.It
.Cd options PCI_INTR_FIXUP
.El
in the kernel configuration might be of use.
.Sh SEE ALSO
.Xr adv 4 ,
.Xr ahc 4 ,
.Xr com 4 ,
.Xr ehci 4 ,
.Xr ex 4 ,
.Xr fxp 4 ,
.Xr ohci 4 ,
.Xr options 4 ,
.Xr pci 4 ,
.Xr pcmcia 4 ,
.Xr rtk 4 ,
.Xr tlp 4 ,
.Xr uhci 4
.Sh HISTORY
The
.Nm
driver appeared in
.Nx 1.5 .
.Sh BUGS
.Ss Memory space conflicts
.Nx
maps memory on Cardbus and PCMCIA cards in order to access the cards
(including reading CIS tuples on PCMCIA cards)
and access the devices using the
.Tn RBUS
abstraction.
When the mapping does not work, PCMCIA cards are typically ignored on
insert, and Cardbus cards are recognized but nonfunctional.
The location is machine-specific, and the default location does not
work on all hardware.
On i386, the following kernel configuration line, which maps Cardbus
space at 512M rather than 1GB, has been found to make Cardbus support
(including PCMCIA attachment under a cbb) work on some notebook
models, including the IBM Thinkpad 600E (2645-4AU) and the Compaq
ARMADA M700:
.Pp
.Cd options RBUS_MIN_START="0x20000000"