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)
- ex
-
3Com 3c575TX and 3c575BTX
- fxp
-
Intel i8255x
- ral
-
Ralink Technology RT25x0 (802.11)
- 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
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
interrupt
then enabling
-
options PCI_ADDR_FIXUP
-
options PCI_BUS_FIXUP
-
options PCI_INTR_FIXUP
or (if ACPI is in use)
-
options PCI_INTR_FIXUP_DISABLED
in the kernel configuration might be of use.
SEE ALSO
adv(4),
ahc(4),
ath(4),
atw(4),
com(4),
ehci(4),
ex(4),
fxp(4),
njs(4),
ohci(4),
options(4),
pci(4),
pcmcia(4),
ral(4),
rtk(4),
rtw(4),
tlp(4),
uhci(4)
HISTORY
The
cardbus
driver appeared in
NetBSD1.5.
BUGS
Memory space conflicts
NetBSD
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
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"