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dummy_cs - PCMCIA dummy device driver
insmod dummy_cs.o [pc_debug=n] [free_ports=n] [irq_list=i,j,...]
The dummy_cs module has two purposes. It is intended as a demonstration of how to write
the PCMCIA interface code for a client driver, and the source code is heavily commented.
It is also written to function as a sort of generic ``point enabler'': when bound to any
PCMCIA IO card, it will read the card's Configuration Information Structure, and configure
the card appropriately. The configuration includes setting up IO and memory windows, con-
figuring the card for interrupts, and initializing the card's PCMCIA configuration regis-
It turns out that many cards report incomplete or inaccurate configuration information,
due to vendor carelessness and the complexity of the data format. A vendor driver can
generally take for granted many configuration details, so there is not much incentive for
vendors to ensure that the on-card information is complete. Thus, the dummy_cs module is
limited by its generality: since it makes no assumptions about card types, it is forced to
rely on the card information, for better or worse.
Selects the PCMCIA debugging level. This parameter is only available if the module
is compiled with debugging enabled. A non-zero value enables debugging.
A flag indicating if the IO ports allocated for the card should be freed from the
kernel resource maps. This is useful if the dummy driver is being used to config-
ure a card in preparation for loading a specific PCMCIA-unaware driver. The
default is 0 (false).
Specifies the set of interrupts that may be allocated by this driver.
David Hinds - email@example.com
pcmcia-cs 2000/06/12 21:24:47 DUMMY_CS(4)
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