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The kernel-doc describing struct fsmc_nand_data is not in sync with
the struct itself. Add missing entries and drop invalid ones.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Mimic what has been done in the core and stop passing mtd_info
objects to internal functions.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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In nand_scan_ident(), the controller driver resets every NAND chip.
This is done by sending NAND_CMD_RESET. The Denali IP provides
another way to do the equivalent thing; if a bit is set in the
DEVICE_RESET register, the controller sends the RESET command to
the corresponding device. denali_reset_banks() uses it to reset
all devices beforehand.
This redundant reset sequence was needed to know the actual number
of chips before calling nand_scan_ident(); if DEVICE_RESET fails,
there is no chip in that chip select. Then, denali_reset_banks()
sets denali->max_banks to the number of detected chips.
As commit f486287d2372 ("mtd: nand: denali: fix bank reset function
to detect the number of chips") explained, nand_scan_ident() issued
Set Features (0xEF) command to all CS lines, some of which may not be
connected with a chip. Then, the driver would wait for R/B# response,
which never happens.
This problem was solved by commit 107b7d6a7ad4 ("mtd: rawnand: avoid
setting again the timings to mode 0 after a reset"). In the current
code, nand_setup_data_interface() is called from nand_scan_tail(),
which is invoked after the chip detection.
Now, we can really remove the redundant denali_nand_banks() by simply
passing the maximum number of chip selects supported by this IP
(typically 4 or 8) to nand_scan(). Let's leave all the chip detection
process to nand_scan_ident().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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The Denali NAND IP has no way to read out the current signal level
of the R/B# pin. Instead, denali_dev_ready() checks if the R/B#
transition has already happened. (The INTR__INT_ACT interrupt is
asserted at the rising edge of the R/B# pin.) It is not a correct
way to implement the ->dev_ready() hook.
In fact, it has a drawback; in the nand_scan_ident phase, the chip
detection iterates over maxchips until it fails to find a homogeneous
chip. For the last loop, nand_reset() fails if no chip is there.
If ->dev_ready hook exists, nand_command(_lp) calls nand_wait_ready()
after NAND_CMD_RESET. However, we know denali_dev_ready() never
returns 1 unless there exists a chip that toggles R/B# in that chip
select. Then, nand_wait_ready() just ends up with wasting 400 msec,
in the end, shows the "timeout while waiting for chip to become ready"
warning.
Let's remove the mis-implemented dev_ready hook, and fallback to
sending the NAND_CMD_STATUS and nand_wait_status_ready(), which
bails out more quickly.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Correct the spelling mistake 'Regiters' -> 'Registers'.
Fixes: 961ba15c48dd ("mtd: rawnand: marvell: Fix clock resource by adding a register clock")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
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Don't readw()/writew() data directly from/to GPIO port which is under
control of gpio-omap driver, use GPIO consumer API instead.
The driver should now work with any 8-bit bidirectional GPIO port, not
only OMAP.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Data port used by the driver is actually an OMAP MPUIO device, already
under control of gpio-omap driver. For that reason we used to not
request the memory region of the port as that would fail because the
region is already busy. Despite that, we are still accessing the port
by just ioremapping it and performing read/write operations. Moreover,
we are doing that without any proteciton from other users legally
manipulating the port pins over GPIO API.
The plan is to convert the driver to access the port over GPIO consumer
API. Before that happens, already prevent from other users accessing
the port pins by requesting an array of its GPIO descriptors.
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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->setup_data_interface() is a controller specific method and should
thus be placed in nand_controller_ops.
In order to make that work with controllers that support keeping
pre-configured timings we need to add a new NAND_KEEP_TIMINGS flag to
inform the core it should skip the timings selection step.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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->exec_op() is a controller method and has nothing to do in the
nand_chip struct. Let's move it to the nand_controller_ops struct and
adjust the core and drivers accordingly.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS line to be selected is passed to ->exec_op() and
stored in chip->cur_cs and after patching all drivers implementing
->exec_op() to stop implementing this method, we can deprecate it by
moving it to the nand_legacy structure.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS to be selected is passed in nand_operation->cs, we can
get rid of the ->select_chip() implementation and replace it by an
internal function which is called from the chip->exec_op() hook.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS to be selected is kept in chip->cur_cs and passed
in nand_operation->cs, we can get rid of the ->select_chip()
implementation and replace it by an internal function which is called
from the chip->exec_op() and chip->ecc.read/write_xxx() hooks.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS to be selected is kept in chip->cur_cs and passed
in nand_operation->cs, we can get rid of the ->select_chip()
implementation and replace it by an internal function which is called
from the chip->exec_op() and chip->ecc.read/write_xxx() hooks.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS to be selected is kept in chip->cur_cs and passed
in nand_operation->cs, we can get rid of the ->select_chip()
implementation and replace it by an internal function which is called
from the chip->exec_op() and chip->ecc.read/write_xxx() hooks.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS line to assert is directly passed through the
nand_operation struct we can replace the fsmc_select_chip()
implementation by an internal fsmc_ce_ctrl() function which is
directly called from fsmc_exec_op()
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Now that the CS to be selected on a nand_operation is passed in
nand_operation->cs we can make the ->select_chip() hook optional for
drivers implementing ->exec_op().
When not implemented, the core is assuming the CS line is automatically
asserted/deasserted by the driver ->exec_op() implementation.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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In order to deprecate the ->select_chip hook we need to pass the CS
line a NAND operations are targeting. This is done through the
addition of a cs field to the nand_operation struct.
We also need to keep track of the currently selected target to
properly initialize op->cs, hence the ->cur_cs field addition to the
nand_chip struct.
Note that op->cs is not assigned in nand_exec_op() because we might
rework the way we execute NAND operations in the future (adopt a
queuing mechanism instead of the serialization we have right now).
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Add a wrapper to prevent drivers and core code from directly calling
the ->select_chip hook which we are about to deprecate.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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All NAND objects are supposed to inherit from nand_controller. The
framework is providing a dummy controller object, but we're moving
away from this approach in favor of explicit inheritance.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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mtd_device_register() can fail, and when it does we should propagate
the error and cleanup what has been done before.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Remove unused labels, rename out_mtd into err_unmap to make it clearer
and return 0 instead of using a goto out at the end of the registration
procedure.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Most of them were reported by checkpatch:
* s/u_char/u8/
* remove unneeded blank lines
* don't print warning messages when devm_kzalloc() fails
* Use ! instead of == NULL
* Remove invalid comment
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Add an SPDX GPL-2.0 tag and update MODULE_LICENSE() to match the
license text.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Drop the asm and mach headers inclusion and allow this driver to be
compiled when COMPILE_TEST=y in order to increase compile-test
coverage.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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nand_exec_op() is only used by core code (nand_xxx.c files). Let's
move this inline function in drivers/mtd/nand/raw/internals.h.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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nand_legacy_set_defaults() returns directly if chip->exec_op != NULL,
no need to test !chip->exec_op after that.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Avoid forward declaration of nand_get_device(), nand_do_write_oob()
and nand_update_bbt() by moving functions around.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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After having reworked the rawnand API to avoid passing mtd_info
objects around, let's do the same for internal functions.
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Tested-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Add minimal support for the Toshiba TC58CVG2S0H SPI NAND chip.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Clément Péron <peron.clem@gmail.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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This patch updates license to use SPDX-License-Identifier
instead of verbose license text.
As original license mentioned, it is GPL-2.0 in SPDX.
Then, MODULE_LICENSE() should be "GPL v2" instead of "GPL".
See ${LINUX}/include/linux/module.h
"GPL" [GNU Public License v2 or later]
"GPL v2" [GNU Public License v2]
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into nand/next
Linux 4.20-rc2
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Make sure we flag all 1.8V broken chips as not supporting this feature.
Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Use the generic DMA API instead of the legacy PCI DMA API.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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The reason of including <linux/bitops.h> here is just for BIT() and
GENMASK macros.
Since commit 8bd9cb51daac8 ("locking/atomics, asm-generic: Move some
macros from <linux/bitops.h> to a new <linux/bits.h> file"),
<linux/bits.h> is enough for such compile-time macros.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Replace legacy callbacks with ->select_chip() and ->exec_op().
Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Replace use of legacy .IOADDR_R/W with runtime calculations based on
priv->io_base.
Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Each controller driver having access to NAND R/B pin over GPIO would
have to reimplement the polling loop otherwise.
Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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Check return value of nand_read_data_op.
Notice that, currently, all instances of nand_read_data_op() are
being checked, with the exception of two of them in marvell_nand
driver, in which the caller function explicitly returns 0 every
time.
Also, notice that I moved the declaration of *ret* to the top of
fsmc_read_page_hwecc().
Addresses-Coverity-ID: 1471968 ("Unchecked return value")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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W25N01GV is a single die version of the already supported
W25M02GV with half the capacity. Everything else is the
same so introduce support for W25N01GV.
Datasheet:http://www.winbond.com/resource-files/w25n01gv%20revl%20050918%20unsecured.pdf
Tested on 8devices Jalapeno dev board under OpenWrt running 4.19-rc5.
Signed-off-by: Robert Marko <robimarko@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
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This enables the complex mapping for the Gemini and kicks in
custom read/write functions that will wrap the existing
simple functions in calls to enable/disable the parallel
flash pins using pin controls.
This is necessary on some hardware such as the D-Link
DIR-685 where all flash pins are patched in/out at the same
time, but some of the flash pins are in practice unused by
the flash and have anyway been reused as GPIO.
This concerns specifically CE1 on the Gemini. There is only
one flash chip, so only CE0 is used, and the line for CE1
has been reused as chip select for the emulated SPI port
connected to the display. If we try to use the same lines
for flash and GPIO at the same time, one of them will loose:
the GPIO line will disappear because it gets disconnected
from the pin when the flash group is muxed out.
Fix this by introducing two pin control states named simply
"enabled" and "disabled" and only enable the flash lines
when absolutely necessary (during read/write/copy). This
way, they are available for GPIO at all other times and
the display works.
Collect all the state variables in a struct named
struct gemini_flash and allocate this struct at probe
time.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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SoC-specific drivers might provide their own map->xxx()
implementations, and calling simple_map_init() unconditionally will
override those implementations.
Make sure map->read is NULL before calling simple_map_init().
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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DEFINE_SHOW_ATTRIBUTE macro can help us simplify the code, so change
to it. And change the DEBUGFS_RO_ATTR macro defined in some file to a
standard macro.
Signed-off-by: Yangtao Li <tiny.windzz@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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Callers of erase_write() always pass an unsigned int.
So this patch avoids a cast to an int.
Signed-off-by: huijin.park <huijin.park@samsung.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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When checking for alignment mtd should check absolute offsets. It's
important for subpartitions as it doesn't make sense to check their
relative addresses.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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When allocating a new partition mtd subsystem runs internal tests in the
allocate_partition(). They may result in modifying specified flags (e.g.
dropping some /features/ like write access).
Those constraints don't have to be necessary true for subpartitions. It
may happen parent partition isn't block aligned (effectively disabling
write access) while subpartition may fit blocks nicely. In such case all
checks should be run again (starting with original flags value).
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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A Coverity robot reported an integer handling issue
(OVERFLOW_BEFORE_WIDEN) in the potentially overflowing expression:
(mtd_div_by_ws(mtd->size, mtd) - mtd_div_by_ws(offs, mtd)) *
mtd_oobavail(mtd, ops)
While such overflow will certainly never happen due to the numbers
handled, it is cleaner to fix this operation anyway.
The problem is that all the maths include 32-bit quantities, while the
result is stored in an explicit 64-bit value.
As maxooblen will just be compared with a size_t, let's change the
type of the variable to a size_t. This will not fix anything but will
clarify a bit the situation. Then, do an explicit cast to fix Coverity
warning.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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The hunk of code is indented too much by one level, fix this by
removing the extraneous tabs. Also terminate block comment using
the recommended coding style to clean up checkpatch warning.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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This adds device tree support for RedBoot partitioning. We
read out the FIS directory block information from the device
tree and then parse the partition table from there.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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This moves the Redboot partition parser down to the parsers
subdirectory.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Addresses-Coverity-ID: 114857 ("Missing break in switch")
Addresses-Coverity-ID: 114858 ("Missing break in switch")
Addresses-Coverity-ID: 114859 ("Missing break in switch")
Addresses-Coverity-ID: 114860 ("Missing break in switch")
Addresses-Coverity-ID: 114861 ("Missing break in switch")
Addresses-Coverity-ID: 114862 ("Missing break in switch")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
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