On some hardware, the nCE signal is wired to the ChipSelect associated
to bus address of the NAND, so it is automatically driven during the
memory access and it is not managed by a GPIO.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
As NAND support for Freescale/NXP IFC controller is available on
LS1021A, the dependency for LS1021A is added.
LS1021A is an earlier product and is not compatible with later
LayerScape architecture. So ARCH_LAYERSCAPE can't cover LS1021A.
Signed-off-by: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
As Freescale/NXP IFC controller is available on LS1021A, the dependency
for LS1021A is added.
LS1021A is an earlier product and is not compatible with later
LayerScape architecture. So ARCH_LAYERSCAPE can't cover LS1021A.
Signed-off-by: Alison Wang <alison.wang@nxp.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
do_dma() uses an int to pass the DMA data direction information and
pass the same value to dmaengine_prep_slave_sg().
Currently, DMA_{FROM,TO}_DEVICE match DMA_{DEV_TO_MEM,MEM_TO_DEV}
definitions so it works fine, but assuming this will always be the case
is not safe.
Enforce enum dma_data_direction type in the function prototype and make
the enum dma_data_direction -> enum dma_transfer_direction conversion
explicit.
Reported-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
As of commit bb475230b8 ("reset: make optional functions really
optional"), the reset framework API calls use NULL pointers to describe
optional, non-present reset controls.
This allows to return errors from devm_reset_control_get_optional and to
call reset_control_(de)assert unconditionally.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
All Hynix MLC NANDs produced with the 1x nm process support read-retry.
This read retry implementation should also be re-usable for other Hynix
NANDs, but the method to retrieve the read-retry parameters from the
read-retry OTP area might change a bit (some NANDs are even using a fixed
set of values instead of retrieving those information from the OTP area).
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
The current NAND ID detection in nand_hynix.c is not handling the
different scheme used by Hynix, thus forcing developers to add new
entry to the nand_ids table each time they want to support a new MLC
NAND.
Enhance the detection logic to handle all known formats. This does not
necessarily mean we are handling all the cases, but if new formats are
discovered, the code should evolve to take them into account instead of
adding more full-id entries to the nand_ids table.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
On some nand controllers with hw-ecc the controller code wants to know
the ecc strength and size and having these as 0, 0 is not accepted.
Specifying these in devicetree is possible but undesirable as the nand
may be different in different production runs of the same board, so it
is better to get this info from the nand id where possible.
This commit adds code to read the ecc strength and size from the nand
for Samsung extended-id nands. This code is based on the info for the 5th
id byte in the datasheets for the following Samsung nands: K9GAG08U0E,
K9GAG08U0F, K9GAG08X0D, K9GBG08U0A, K9GBG08U0B. These all use these bits
in the exact same way.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Move Macronix specific initialization logic into nand_macronix.c. This
is part of the "separate vendor specific code from core" cleanup
process.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Move AMD/Spansion specific initialization/detection logic into
nand_amd.c. This is part of the "separate vendor specific code from
core" cleanup process.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Move Micron specific initialization logic into nand_micron.c. This is
part of the "separate vendor specific code from core" cleanup process.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Move Toshiba specific initialization and detection logic into
nand_toshiba.c. This is part of the "separate vendor specific code from
core" cleanup process.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Move Hynix specific initialization and detection logic into
nand_hynix.c. This is part of the "separate vendor specific code from
core" cleanup process.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Move Samsung specific initialization and detection logic into
nand_samsung.c. This is part of the "separate vendor specific code from
core" cleanup process.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
A lot of NANDs are implementing generic features in a non-generic way,
or are providing advanced auto-detection logic where the NAND ID bytes
meaning changes with the NAND generation.
Providing this vendor specific initialization step will allow us to get
rid of full-id entries in the nand_ids table or all the vendor specific
cases added over the time in the generic NAND ID decoding logic.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
There is no reason to expose the NAND manufacturer table. Provide an
helper function to find manufacturers by their id.
We also turn the nand_manufacturers table into a const array, since its
members are not modified after the initial assignment.
Finally, we remove the sentinel manufacturer entry from the manufacturers
table (we already have the array size information given by ARRAY_SIZE()),
and add the nand_manufacturer_name() helper to handle the "Unknown" case
properly.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
MTD_NAND_IDS is selected by MTD_NAND, which makes it useless. Remove
the Kconfig option and link nand_ids.o into the nand.o object file.
Doing that also prevents creating an extra nand_ids.ko module when
MTD_NAND is activated as a module.
Since nand_ids.c is no longer compiled as a standalone module and the
nand_manuf_ids/nand_flash_ids symbols are only used in nand_base.c, we
can get rid of the MODULE_XXX() and EXPORT_SYMBOL() definitions.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Drop the 's' at the end of nand_manufacturers since the struct is actually
describing a single manufacturer, not a manufacturer table.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Since commit 4722c0e958 ("mtd: nand: change return type of
nand_get_flash_type() to int"), nand_get_flash_type() no longer returns
a nand_flash_dev object.
Rename the function to match this new behavior.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Auto-detection functions are passed a busw parameter to retrieve the actual
NAND bus width and eventually set the correct value in chip->options.
Rework the nand_get_flash_type() function to get rid of this extra
parameter and let detection code directly set the NAND_BUSWIDTH_16 flag in
chip->options if needed.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Now that struct nand_chip embeds an mtd_info object we can get rid of the
mtd parameter and extract it from the chip parameter with the nand_to_mtd()
helper.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Richard Weinberger <richard@nod.at>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Dan Carpenter
Christophe Leroy
Alison Wang
Boris Brezillon
Colin Ian King
Philipp Zabel
Hans de Goede
Linus Torvalds