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Commit 6e532afaca8e ("mtd: nand: atmel: Add PM ops") started to use the
nand_reset() function which was not yet exported by the NAND framework
(because it was only used internally before that). Export this symbol
to avoid build errors when the driver is enabled as a module.
Fixes: 6e532afaca8e ("mtd: nand: atmel: Add PM ops")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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According to the datasheet, the HW sequencer has a predefined list
of opcodes, with only the erase opcode being programmable in LVSCC
and UVSCC registers. If these registers don't contain a valid erase
opcode (eg: BIOS does not program it), erase cannot be done using
the HW sequencer, even though the erase operation does not report
any error, the flash remains not erased.
If such register setting is detected, let's fall back to use the SW
sequencer to erase instead.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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The ispi->swseq is used for register access. Let's rename it to
swseq_reg to better describe its usage.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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There is no code that alters the HSFSTS register content in between
in intel_spi_write(). Remove the unnecessary RW to save some cycles.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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At present the driver relies on valid OPMENU0/OPMENU1 register values
that are programmed by BIOS to function correctly. However in a real
world it's absolutely legitimate for a bootloader to leave these two
registers untouched. Intel FSP for Baytrail exactly does like this.
When we are booting from any Intel FSP based bootloaders like U-Boot,
the driver refuses to work.
We can of course program various flash opcodes in the OPMENU0/OPMENU1
registers, and such workaround can be added in either the bootloader
codes, or the kernel driver itself.
But a graceful solution would be to update the kernel driver to remove
such limitation of OPMENU0/1 register dependency. The SPI controller
settings are not locked under such configuration. So we can first check
the controller locking status, and if it is not locked that means the
driver job can be fulfilled by using a chosen OPMENU index to set up
the flash opcode every time.
While we are here, the missing 'Atomic Cycle Sequence' handling in the
SW sequencer codes is also added.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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So far intel_spi_write() uses the HW sequencer to do the write. But
the HW sequencer register HSFSTS_CTL does not have such a field for
'Atomic Cycle Sequence', remove it.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Baytrail/Lynx Point SPI controller's HW sequencer only supports basic
operations. This is determined by the chipset design, however current
codes try to use register values in OPMENU0/OPMENU1 to see whether SW
sequencer should be used, which is wrong. In fact OPMENU0/OPMENU1 can
remain unprogrammed by some bootloaders.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Intel SPI controller only has a 64 bytes FIFO. This adds a sanity
check before triggering any HW/SW sequencer work.
Additionally for the SW sequencer, if given data length is zero,
we should not mark the 'Data Cycle' bit.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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There are two bugs in current intel_spi_sw_cycle():
- The 'data byte count' field should be the number of bytes
transferred minus 1
- SSFSTS_CTL is the offset from ispi->sregs, not ispi->base
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Cc: <stable@vger.kernel.org> # v4.11+
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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intel_spi_hw_cycle() and intel_spi_sw_cycle() don't use the parameter
'buf' at all. Remove it.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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The number of protected range registers is not the same on BYT/LPT/
BXT. GPR0 only exists on Apollo Lake and its offset is reserved on
other platforms.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Intel Cedar Fork has the same SPI serial flash controller than Intel
Denverton. Add the Intel Cedar Fork PCI ID to the driver list of
supported devices.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Intel Lewisburg chipset exposes the SPI serial flash controller as a PCI
device in the same way than Intel Denverton. Add Intel Lewisburg SPI
serial flash PCI ID to the driver list of supported devices.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Tested against GD25LQ32D but the GD25LQ32C datasheet seems to be
identically feature-wise. Therefore dropping the suffix as it's
probably only indicating the die revision.
Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Add support for GD25Q256, a 32MiB SPI Nor flash
from GigaDevice.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Some manufacturers may use different bit to set QE on different
memories.
The GD25Q256 from GigaDevice is an example, which uses S6(bit 6
of the Status Register-1) to set QE, which is different with
other supported memories from GigaDevice that use S9(bit 1 of
the Status Register-2). This makes it is impossible to select
the quad enable method by distinguishing the MFR. This patch
introduce a quad_enable function which can be set per memory
in the flash_info list table.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Allow ARM64 support for the Cadence QSPI interface by
adding ARM64 as a dependency.
Signed-off-by: Thor Thayer <thor.thayer@linux.intel.com>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Implemented and populated spi-nor mtd PM handlers for resume ops.
spi-nor resume op re-initializes spi-nor flash to its probed
state by calling the newly implemented spi_nor_init() function.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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This patch extracts some chunks from spi_nor_init_params and spi_nor_scan()
and moves them into a new spi_nor_init() function.
Indeed, spi_nor_init() regroups all the required SPI flash commands to be
sent to the SPI flash memory before performing any runtime operations
(Fast Read, Page Program, Sector Erase, ...). Hence spi_nor_init():
1) removes the flash protection if applicable for certain vendors.
2) sets the Quad Enable bit, if needed, before using Quad SPI protocols.
3) makes the memory enter its (stateful) 4-byte address mode, if needed,
for SPI flash memory > 128Mbits not supporting the 4-byte address
instruction set.
spi_nor_scan() now ends by calling spi_nor_init() once the probe phase has
completed. Further patches could also use spi_nor_init() to implement the
mtd->_resume() handler for the spi-nor framework.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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header.minor is of type u8 and cannot be negative.
Detected by CoverityScan CID#1417858 ("Integer handling issues")
Fixes: f384b352cbf0 ("mtd: spi-nor: parse Serial Flash Discoverable
Parameters (SFDP) tables")
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
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Marvell recent SoCs like A7k/A8k do not boot with NAND flash
controller activated by default. Enabling the controller is a matter of
writing in a system controller register that may also be used for other
NAND related choices.
This change is needed to stay bootloader independent.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Use the of_device_get_match_data() helper instead of open coding.
While at it, make config const so the cast can be dropped.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The WE_2_RE register specifies the number of clock cycles inserted
between the rising edge of #WE and the falling edge of #RE.
The current setup_data_interface implementation takes care of tWHR,
but tCCS is missing. Wait for max(tCSS, tWHR) to meet the spec.
With setup_data_interface() properly programmed, the Denali NAND
controller can observe the timing, so NAND_WAIT_TCCS flag is unneeded.
Clarify this in the comment block.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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More and more SoCs use the pxa3xx_nand driver for their controller but
the list of them was not updated. This patch add the last SoCs using the
driver.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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During backup mode, the contents of all registers will be cleared as the
SoC will be completely powered down. For a product that boots on NAND
Flash memory, the bootloader will obviously use the related controller
to read the Flash and correct any detected error in the memory, before
handling back control to the kernel's resuming entry point.
But it does not clean the NAND controller registers after use and on its
side the kernel driver expects the error locator to be powered down and
in a clean state. Add a resume hook for the PMECC error locator, and
reset its registers.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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1. Add the function for command descriptor preparation which will
be used only by BAM DMA and it will form the DMA descriptors
containing command elements
2. DMA_PREP_CMD flag should be used for forming command DMA
descriptors
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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All the QPIC register read/write through BAM DMA requires
command descriptor which contains the array of command elements.
Reviewed-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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There is exactly one board in the kernel that defines platform data
for the GPIO NAND driver.
Use the feature to provide a lookup table for the GPIOs in the board
file so we can convert the driver as a whole to just use GPIO
descriptors.
After this we can cut the use of <linux/of_gpio.h> and use the GPIO
descriptor management from <linux/gpio/consumer.h> alone to grab and use
the GPIOs used in the driver.
I also created a local struct device *dev in the probe() function
because I was getting annoyed with all the &pdev->dev dereferencing.
Cc: arm@kernel.org
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Frans Klaver <fransklaver@gmail.com>
Cc: Gerhard Sittig <gsi@denx.de>
Cc: Jamie Iles <jamie.iles@oracle.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Marek Vasut <marek.vasut@gmail.com>
Acked-by: Jamie Iles <jamie.iles@oracle.com>
Acked-by: Olof Johansson <olof@lixom.net>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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When calculating the size needed by struct atmel_pmecc_user *user,
the dmu and delta buffer sizes were forgotten.
This lead to a memory corruption (especially with a large ecc_strength).
Link: http://lkml.kernel.org/r/1506503157.3016.5.camel@gmail.com
Fixes: f88fc122cc34 ("mtd: nand: Cleanup/rework the atmel_nand driver")
Cc: stable@vger.kernel.org
Reported-by: Richard Genoud <richard.genoud@gmail.com>
Pointed-at-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
Reviewed-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Commit 1eeef2d7483a ("mtd: handle partitioning on devices with 0
erasesize") introduced a regression on heterogeneous erase region
devices. Alignment of the partition was tested against the master
eraseblock size which can be bigger than the slave one, thus leading
to some partitions being marked as read-only.
Update wr_alignment to match this slave erasesize after this erasesize
has been determined by picking the biggest erasesize of all the regions
embedded in the MTD partition.
Reported-by: Mathias Thore <Mathias.Thore@infinera.com>
Fixes: 1eeef2d7483a ("mtd: handle partitioning on devices with 0 erasesize")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Mathias Thore <Mathias.Thore@infinera.com>
Reviewed-by: Mathias Thore <Mathias.Thore@infinera.com>
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The previous commit added some hooks into struct denali_nand_info,
so here is one more for clean-up.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The Denali NAND IP core decodes the lower 28 bits of the slave address
to get the control information; bit[27:26]=mode, bit[25:24]=bank, etc.
This means 256MB address range must be allocated for this IP. (Direct
Addressing)
For systems with address space limitation, the Denali IP provides an
optional module that translates the addressing - address and data are
latched by the registers in the translation module. (Indexed Addressing)
The addressing mode can be selected when the delivered RTL is configured,
and it can be read out from the FEATURES register.
Most of SoC vendors would choose Indexed Addressing to save the address
space, but Direct Addressing is possible as well, and it can be easily
supported by adding ->host_{read,write} hooks.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The ECC correction is properly enabled/disabled before the page
read/write. There is no need to set up this at the beginning of
the probe.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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I used (uint64_t) cast to avoid "right shift count >= width of type"
warning. <linux/kernel.h> provides nice helpers to cater to it.
The code will be cleaner, and easier to understand.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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This driver explains too much about what is apparent from the code.
Comments around basic APIs such as init_completion(), spin_lock_init(),
etc. seem unneeded lessons to kernel developers.
(With those comments dropped, denali_drv_init() is small enough,
so it has been merged into the probe function.)
Also, NAND driver developers should know the NAND init procedure, so
there is no need to explain nand_scan_ident/tail.
I removed FSF's address from the license blocks, and added simple
comments to struct members.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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In several places in this driver, the register fields are retrieved
as follows:
val = reg & FOO_MASK;
Then, modified as follows:
reg &= ~FOO_MASK;
reg |= val;
This code relies on its shift is 0, which we will never know until
we check the definition of FOO_MASK. Use FIELD_PREP / FIELD_GET
where appropriate.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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All the register offsets and bitfield masks are defined in denali.h,
but the driver code ended up with additional crappy macros such as
MAKE_ECC_CORRECTION(), ECC_SECTOR(), etc.
The reason is apparent - accessing a register field requires mask and
shift pair. The denali.h only provides mask. However, defining both
is tedious.
<linux/bitfield.h> provides a convenient way to get register fields
only with a single shifted mask. Now use it.
While I am here, I shortened some macros.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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This function has a local variable "irq_mask" and its value is
the same as denali->irq_mask. Clean up the code a little.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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This helper just sets/clears a flag of DMA_ENABLE register (with
register read-back, I do not know why it is necessary).
Move the register write code to the caller, and remove the helper.
It works for me without the register read-back.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Include necessary headers explicitly without relying on indirect
header inclusion. Also, sort them alphabetically.
<linux/delay.h>, <linux/wait.h>, <linux/mutex.h> turned out bogus,
so removed.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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All functions in this driver are prefixed with denali_
except detect_max_banks(). Rename it for consistency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The setup_ecc_for_xfer() is only called from denali_data_xfer().
This helper is small enough, so squash it into the caller.
This looks cleaner to me.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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The register TWO_ROW_ADDR_CYCLES specifies the number of row address
cycles of the device, but it is fixed to 0 in the driver init code
(i.e. always 3 row address cycles).
Reflect the result of nand_scan_ident() to the register setting
in order to support 2 row address cycle devices.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Several drivers check ->chipsize to see if the third row address cycle
is needed. Instead of embedding magic sizes such as 32MB, 128MB in
drivers, introduce a new flag NAND_ROW_ADDR_3 for clean-up. Since
nand_scan_ident() knows well about the device, it can handle this
properly. The flag is set if the row address bit width is greater
than 16.
Delete comments such as "One more address cycle for ..." because
intention is now clear enough from the code.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Wenyou Yang <wenyou.yang@microchip.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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Use the core's large page OOB layout functions when not reserving any
space for ECC bytes in the OOB layout. Fix ->nand_ooblayout_ecc_lp()
to return -ERANGE instead of a zero length in this case.
Signed-off-by: Miquel Raynal <miquel.raynal@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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This patch fix the following build warning:
drivers/mtd/nand/nand_base.c:2671:30: attention : variable ‘blockmask’ set but not used [-Wunused-but-set-variable]
Fixes: 0b4773fd1649 ("mtd: nand: Drop unused cached programming support")
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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If 'clk_prepare_enable()' fails, we must 'put' the corresponding clock.
Fixes: 4d26f012ab59 ("mtd: nand: lpc32xx_mlc: Handle return value of clk_prepare_enable.")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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spi_nor_read_sfdp() calls nor->read() to read the SFDP data.
When the m25p80 driver is used (pretty common case), nor->read() is then
implemented by the m25p80_read() function, which is likely to initialize a
'struct spi_transfer' from its buf argument before appending this
structure inside the 'struct spi_message' argument of spi_sync().
Besides the SPI sub-system states that both .tx_buf and .rx_buf members of
'struct spi_transfer' must point into dma-safe memory. However, two of the
three calls of spi_nor_read_sfdp() were given pointers to stack allocated
memory as buf argument, hence not in a dma-safe area.
Hopefully, the third and last call of spi_nor_read_sfdp() was already
given a kmalloc'ed buffer argument, hence dma-safe.
So this patch fixes this issue by introducing a
spi_nor_read_sfdp_dma_unsafe() function which simply wraps the existing
spi_nor_read_sfdp() function and uses some kmalloc'ed memory as a bounce
buffer.
Fixes: f384b352cbf0 ("mtd: spi-nor: parse Serial Flash Discoverable Parameters (SFDP) tables")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.fr>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
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One field of the flash parameter table contains information about the
flash device size.
Most of the time the data extracted from this field is valid, but
sometimes the BFPT section of the SFDP table is corrupted or invalid and
this field is set to 0xffffffff, thus resulting in an integer overflow
when setting params->size.
Since NOR devices are anayway always smaller than 2^64 bytes, we can
easily stop the BFPT parsing if the size reported in this table is
invalid.
Fixes: f384b352cbf0 ("mtd: spi-nor: parse Serial Flash Discoverable Parameters (SFDP) tables")
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Cyrille Pitchen <cyrille.pitchen@wedev4u.com>
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Pull UBI updates from Richard Weinberger:
"Minor improvements"
* tag 'upstream-4.14-rc1' of git://git.infradead.org/linux-ubifs:
UBI: Fix two typos in comments
ubi: fastmap: fix spelling mistake: "invalidiate" -> "invalidate"
ubi: pr_err() strings should end with newlines
ubi: pr_err() strings should end with newlines
ubi: pr_err() strings should end with newlines
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