NAME
cardbus, cardslot,
cbb —
CardBus driver
SYNOPSIS
cbb* at pci? dev? function ?
cardslot* at cbb?
cardbus* at cardslot?
pcmcia* at cardslot?
XX* at cardbus? function ?
DESCRIPTION
NetBSD provides machine-independent bus support and drivers for CardBus devices.The cbb device represents the CardBus
controller. Each controller has a number of slots, represented by the
cardslot devices. A slot can have either a CardBus
card or a PCMCIA card, which are attached with the
cardbus or pcmcia devices,
respectively.
SUPPORTED DEVICES
NetBSD includes the following machine-independent CardBus drivers, sorted by function and driver name:
Network interfaces
- ath
- Atheros 5210/5211/5212 802.11
- atw
- ADMtek ADM8211 (802.11)
- bwi
- Broadcom BCM430x/4318 (802.11)
- ex
- 3Com 3c575TX and 3c575BTX
- fxp
- Intel i8255x
- ral
- Ralink Technology RT25x0 (802.11)
- re
- RealTek 8139C+/8169/8169S/8110S
- rtk
- Realtek 8129/8139
- rtw
- Realtek 8180L (802.11)
- tlp
- DECchip 21143
Serial interfaces
- com
- Modems and serial cards
SCSI controllers
- adv
- AdvanSys 1200[A,B], 9xx[U,UA]
- ahc
- Adaptec ADP-1480
- njs
- Workbit NinjaSCSI-32
USB controllers
- ehci
- Enhanced Host Controller (2.0)
- ohci
- Open Host Controller
- uhci
- Universal Host Controller
IEEE1394 controllers
- fwohci
- OHCI controller
SD/MMC/SDIO controllers
- sdhc
- SD Host Controller
Disk and tape controllers
- njata
- Workbit NinjaATA-32
- siisata
- Silicon Image SATA-II controllers
DIAGNOSTICS
cbb devices may not be properly handled by
the system BIOS on i386-family systems. If, on an i386-family system, the
cbb driver reports
cbb0: NOT USED because of
unconfigured interruptoptions PCI_ADDR_FIXUPoptions PCI_BUS_FIXUPoptions PCI_INTR_FIXUP
options PCI_INTR_FIXUP_DISABLED
SEE ALSO
adv(4), ahc(4), ath(4), atw(4), bwi(4), com(4), ehci(4), ex(4), fwohci(4), fxp(4), njata(4), njs(4), ohci(4), options(4), pci(4), pcmcia(4), ral(4), re(4), rtk(4), rtw(4), sdhc(4), siisata(4), tlp(4), uhci(4)
HISTORY
The cardbus driver appeared in
NetBSD 1.5.
BUGS
Memory space conflicts
NetBSD maps memory on Cardbus (and therefore PCMCIA cards behind Cardbus) in order to access the cards (including reading CIS tuples on PCMCIA cards) and access the devices using the 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:
options
RBUS_MIN_START="0x20000000"
PCMCIA addressing choice
By default, on i386 and amd64, the kernel uses
RBUS_IO_BASE as 0x4000 and
RBUS_IO_SIZE as 0x2000. On some machines, this
fails, due to a requirement that these addresses fit within 12 bits. The
following kernel options have been reported as helpful:
options RBUS_IO_BASE="0xa00"
options
RBUS_IO_SIZE="0x00ff"