dummy_cb(4)

NAME

dummy_cb - CardBus dummy device driver

insmod dummy_cb.o [pc_debug=n]

The dummy_cb module is a sort of "point enabler" for Card
Bus cards. When it is bound to a card, it configures that card,
but otherwise does not do anything. It may be useful for cards
that have Hot Plug PCI kernel drivers, but do not have CardBus
client drivers in the pcmcia-cs package. Hot Plug PCI drivers
expect the kernel to handle CardBus card configuration; instead,
drivers in the pcmcia-cs package rely on the cb_enabler module to
do that.
To use dummy_cb, edit /etc/pcmcia/config.opts and add one
or more card descriptions, like:: card "Western Digital 1394 Adapter"
pci 0x1033, 0x00cd
bind "dummy_cb"
This will override any driver bindings in the main config
file. After restarting cardmgr, then, insertion of these cards
should load dummy_cb. After that, the Hot Plug PCI driver can be
loaded.
Before ejecting a card using dummy_cb, it is important to
manually unload the corresponding Hot Plug PCI driver. Since
cardmgr cannot notify this sort of driver about removal events,
bad things can happen if the Hot Plug PCI driver is not unloaded
first. Yes this is rather fragile. Ideally, people will use Hot
Plug PCI drivers with the kernel PCMCIA subsystem, but dummy_cb
is meant as a quick fix for situations where that is not possi
ble.

pc_debug=n: Selects the PCMCIA debugging level. This parameter; is only available if the module is compiled with debugging en; abled. A non-zero value enables debugging.

David Hinds - dahinds@users.sourceforge.net