kernel-fxtec-pro1x/include/linux/mtd
Matthieu CASTET 64b37b2a63 mtd: nand: add NAND_BUSWIDTH_AUTO to autodetect bus width
The driver call nand_scan_ident in 8 bit mode, then
readid or onfi detection are done (and detect bus width).
The driver should update its bus width before calling nand_scan_tail.

This work because readid and onfi are read work 8 byte mode.

Note that nand_scan_ident send command (NAND_CMD_RESET, NAND_CMD_READID, NAND_CMD_PARAM), address and read data
The ONFI specificication is not very clear for x16 device if high byte of address should be driven to 0,
but according to [1] it should be ok to not drive it during autodetection.

[1]
3.3.2. Target Initialization

[...]
The Read ID and Read Parameter Page commands only use the lower 8-bits of the data bus.
The host shall not issue commands that use a word data width on x16 devices until the host
determines the device supports a 16-bit data bus width in the parameter page.

Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
2012-12-03 16:36:52 +02:00
..
bbm.h
blktrans.h
cfi.h
cfi_endian.h
concat.h
doc2000.h
flashchip.h
fsmc.h
ftl.h
gen_probe.h
inftl.h
latch-addr-flash.h
lpc32xx_mlc.h
lpc32xx_slc.h
map.h
mtd.h
mtdram.h
nand-gpio.h
nand.h
nand_bch.h
nand_ecc.h
ndfc.h
nftl.h
onenand.h
onenand_regs.h
partitions.h
pfow.h
physmap.h
pismo.h
plat-ram.h
qinfo.h
sh_flctl.h
sharpsl.h
spear_smi.h
super.h
ubi.h
xip.h