FTL_CS(4)						     Kernel Interfaces Manual							 FTL_CS(4)

NAME

       ftl_cs - Flash Translation Layer driver for PCMCIA memory cards

SYNOPSIS

       insmod ftl_cs.o [pc_debug=n] [major_dev=n]

DESCRIPTION

       Flash  memory  devices typically need to be erased before they are written, and most flash devices can only be erased on large block bound-
       aries like 64K or 128K.	The Flash Translation Layer driver, ftl_cs, implements a sort of  virtual  sector-addressable  block  device  that
       hides the details of erase operations.  Using the FTL driver, a flash memory card can be treated as an ordinary block device.

       The  ftl_cs  driver allocates a major device number when it is loaded.  Minor device numbers have a bitwise layout of 'dddrrppp'.  'ddd' is
       the device number, with one card counting as one device.  'rr' is the common-memory region number, generally 0.	And 'ppp' selects a  logi-
       cal partition within the FTL region.

       The default configuration script for FTL devices will create a block device with the name of the form '/dev/ftl{d}c{r}', where '{d}' is the
       device number and '{r}' is the region number, that spans the entire FTL region.	It also creates devices  '/dev/ftl{d}c{r}p[1-4]'  pointing
       to partitions 1 through 4 within this FTL region.

       An  FTL	region	must  be  formatted before use.  The formatting utility, ftl_format, needs to write to the corresponding raw memory device
       rather than the FTL device interface.

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.

       major_dev=n
	      Selects the major device number to allocate for FTL devices.  The default is to pick any available major number.

AUTHOR

       David Hinds - dahinds@users.sourceforge.net

SEE ALSO

       ftl_format(8), cardmgr(8), memory_cs(4), pcmcia(5).

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