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.Dd January 6, 2007 .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.
p 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 l -tag -width speaker -offset indent -compact t ath Atheros 5210/5211/5212 802.11 t atw ADMtek ADM8211 (802.11) t ex 3Com 3c575TX and 3c575BTX t fxp Intel i8255x t ral Ralink Technology RT25x0 (802.11) t rtk Realtek 8129/8139 t rtw Realtek 8180L (802.11) t tlp DECchip 21143 .El .Ss Serial interfaces l -tag -width speaker -offset indent -compact t com Modems and serial cards .El .Ss SCSI controllers l -tag -width speaker -offset indent -compact t adv AdvanSys 1200[A,B], 9xx[U,UA] t ahc Adaptec ADP-1480 t njs Workbit NinjaSCSI-32 .El .Ss USB controllers l -tag -width speaker -offset indent -compact t ehci Enhanced Host Controller (2.0) t ohci Open Host Controller t uhci Universal Host Controller .El .Ss IEEE1394 controllers l -tag -width speaker -offset indent -compact t 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 l -item -offset indent -compact t .Cd options PCI_ADDR_FIXUP t .Cd options PCI_BUS_FIXUP t .Cd options PCI_INTR_FIXUP .El or (if ACPI is in use) l -item -offset indent -compact t .Cd ACPI_PCI_FIXUP .El in the kernel configuration might be of use. .Sh SEE ALSO .Xr adv 4 , .Xr ahc 4 , .Xr ath 4 , .Xr atw 4 , .Xr com 4 , .Xr ehci 4 , .Xr ex 4 , .Xr fxp 4 , .Xr njs 4 , .Xr ohci 4 , .Xr options 4 , .Xr pci 4 , .Xr pcmcia 4 , .Xr ral 4 , .Xr rtk 4 , .Xr rtw 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. On i386, the kernel has a heuristic to choose a memory address for mapping, defaulting to 1 GB, but choosing 0.5 GB on machines with less than 192 MB RAM and 2 GB on machines with more than 1 GB of RAM. The intent is to use an address that is larger than available RAM, but low enough to work; some systems seem to have trouble with addresses requiring more than 20 address lines. On i386, the following kernel configuration line disables the heuristics and forces Cardbus memory space to be mapped at 512M; this value makes 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:
p .Cd options RBUS_MIN_START="0x20000000"