Name
nand_prepare_oobbuf —
[GENERIC] Prepare the out of band buffer
Synopsis
u_char * nand_prepare_oobbuf ( | struct mtd_info * | mtd, |
| | u_char * | fsbuf, |
| | struct nand_oobinfo * | oobsel, |
| | int | autoplace, |
| | int | numpages); |
Arguments
mtd
MTD device structure
fsbuf
buffer given by fs driver
oobsel
out of band selection structre
autoplace
1 = place given buffer into the oob bytes
numpages
number of pages to prepare
Return
1. Filesystem buffer available and autoplacement is off,
return filesystem buffer
2. No filesystem buffer or autoplace is off, return internal
buffer
3. Filesystem buffer is given and autoplace selected
put data from fs buffer into internal buffer and
retrun internal buffer
Note
The internal buffer is filled with 0xff. This must
be done only once, when no autoplacement happens
Autoplacement sets the buffer dirty flag, which
forces the 0xff fill before using the buffer again.