ftl_cs

FTL_CS(4)                                                            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 writ-
       ten, 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  com-
       mon-memory  region  number,  generally  0.  And 'ppp' selects a logical
       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)