Ext2 SD card utility to read and write to it Post: 302991070

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dummy_cs

DUMMY_CS(4)						     Kernel Interfaces Manual						       DUMMY_CS(4)

NAME

       dummy_cs - PCMCIA dummy device driver

SYNOPSIS

       insmod dummy_cs.o [pc_debug=n] [free_ports=n] [irq_list=i,j,...]

DESCRIPTION

       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 set-
       ting up IO and memory windows, configuring the card for interrupts, and initializing the card's PCMCIA configuration registers.

       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.

PARAMETERS

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

       free_ports=n
	      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 configure a card in preparation for loading a specific PCMCIA-unaware driver.  The default is 0 (false).

       irq_list=i,j,...
	      Specifies the set of interrupts that may be allocated by this driver.

AUTHOR

       David Hinds - dahinds@users.sourceforge.net

SEE ALSO

       cardmgr(8), pcmcia(5).

pcmcia-cs							2000/06/12 21:24:47						       DUMMY_CS(4)

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