Spansion S25FL204K is a 4-Mbit 3.0V Serial Flash Memory
with Uniform 4 kB Sectors.
Signed-off-by: NAntony Pavlov <antonynpavlov@gmail.com>
Acked-by: NRafał Miłecki <zajec5@gmail.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

The current "We only connect the NOR to this controller now." text
is not very clear, so explain it better by saying that generic SPI
is not supported by SPI_FSL_QUADSPI and only SPI NOR is.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Add SPI-NOR driver for the SPI Flash Interface (SPIFI)
controller that is found on newer NXP MCU devices.

The controller supports serial SPI Flash devices with 1-, 2-
and 4-bit width in either SPI mode 0 or 3. The controller
can operate in either command or memory mode. In memory mode
the Flash is exposed as normal memory and can be directly
accessed by the CPU.
Signed-off-by: NJoachim Eastwood <manabian@gmail.com>
Reviewed-by: NEzequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

The initial buffer is used for the initial commands used to detect
a flash device (STATUS, READID and PARAM).

ONFI param page is 256 bytes, and there are three redundant copies
to be read. JEDEC param page is 512 bytes, and there are also three
redundant copies to be read. Hence this buffer should be at least
512 x 3. This commits rounds the buffer size to 2048.
Signed-off-by: NEzequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

While IS_ENABLED() is perfectly fine for CONFIG_* symbols, it is not
for other symbols such as __BIG_ENDIAN that is provided directly by
the compiler.

Switch to use CONFIG_CPU_BIG_ENDIAN instead of __BIG_ENDIAN.

Fixes: 27c5b17c ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller")
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Erase function will use cmd 0x20 (SPINOR_OP_BE_4K) if kenrel enable option
CONFIG_MTD_SPI_NOR_USE_4K_SECTORS.

This command is not in fsl-quadspi driver LUT. So driver continue report
fsl-quadspi 21e0000.qspi: Unsupported cmd 0x20.

This patch fix this issue.
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Acked-by: NHan Xu <Han.xu@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

The uboot may run the QuadSpi controler with command:
    #sf probe

So we should reset the module in the probe.
This patch also clear the pending interrupts which arised by the uboot
code.
Signed-off-by: NHuang Shijie <shijie8@gmail.com>
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

QSPI1 cannot wake up CCM from WAIT mode on SX ARD board, add pmqos to
let PM NOT enter WAIT mode when accessing QSPI1, refer to TKT245618.
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Signed-off-by: NHan Xu <Han.xu@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

We found there is a low probability(5%) QSPI access timeout issue,
usually it happened on kernel boot stage, the first time kernel tried to
access QSPI chip. The READ_ID command was sent but not executed,
consequently the probe function failed.

The root cause is that the divider is not glitchless in i.MX6SX chip.
If qspi clock enabled then change clock frequency by call clk_set_rate,
there will be glitch at low possiblity rate and pass to qspi controller.
The controler will be hang by this glitch.

Based on the new clock flag(CLK_SET_RATE_GATE) and new framework, we
need to change the approach of seting clock rate.
1. Disable clock.
2. call clk_set_rate.
3. Enable clock again.
Signed-off-by: NHan Xu <han.xu@freescale.com>
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Add i.mx6ul chip support
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Acked-by: NHan xu <han.xu@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Support i.mx7d.
quadspi in i.mx7d increase rxfifo.
require fill at least 16byte to trigger data transfer.
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Signed-off-by: NHan Xu <han.xu@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

add several quirk to distinguish different version of qspi module.
Signed-off-by: NHan Xu <han.xu@freescale.com>
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

QSPI may failed to map enough memory (256MB) for AHB read in
previous implementation, especially in 3G/1G memory layout kernel.
Dynamically map memory to avoid such issue.

This implementation generally map QUADSPI_MAX_IOMAP (default 4MB) memory
for AHB read, it should be enough for common scenarios, and the side
effect (0.6% performance drop) is minor.

Previous implementation

root@imx6qdlsolo:~# dd if=/dev/mtd0 of=/dev/null bs=1K count=32K
32768+0 records in
32768+0 records out
33554432 bytes (34 MB) copied, 2.16006 s, 15.5 MB/s

root@imx6qdlsolo:~# dd if=/dev/mtd0 of=/dev/null bs=32M count=1
1+0 records in
1+0 records out
33554432 bytes (34 MB) copied, 1.43149 s, 23.4 MB/s

After applied the patch

root@imx6qdlsolo:~# dd if=/dev/mtd0 of=/dev/null bs=1K count=32K
32768+0 records in
32768+0 records out
33554432 bytes (34 MB) copied, 2.1743 s, 15.4 MB/s

root@imx6qdlsolo:~# dd if=/dev/mtd0 of=/dev/null bs=32M count=1
1+0 records in
1+0 records out
33554432 bytes (34 MB) copied, 1.43158 s, 23.4 MB/s
Signed-off-by: NHan Xu <han.xu@freescale.com>
Signed-off-by: NFrank Li <Frank.Li@freescale.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

When we added the "jedec,spi-nor" compatible string for use in this
driver, we added it as a modalias option. The modalias can be derived in
different ways for platform devices vs. device tree (of_*) matching. But
for device tree matching (the primary target of this identifier string),
the modalias is determined from the first entry in the 'compatible'
property. IOW, the following properties would bind to this driver:

	// Option (a), modalias = "spi-nor"
	compatible = "jedec,spi-nor";

	// Option (b), modalias = "spi-nor"
	compatible = "idontknowwhatimdoing,spi-nor";

But the following would not:

	// Option (c), modalias = "shinynewdevice"
	compatible = "myvendor,shinynewdevice", "jedec,spi-nor";

So, we'd like to match (a) and (c) (even when we don't have an explicit
entry for "shinynewdevice"), and we'd rather not allow (b).

To do this, we
  (1) always (for devices without specific platform data) pass the
      modalias to the spi-nor library;
  (2) rework the spi-nor library to not reject "bad" names, and
      instead just fall back to autodetection; and
  (3) add the .of_match_table to properly catch all "jedec,spi-nor".

This allows (a) and (c) without warnings, and rejects (b).
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Replaces the hard coded "always use EDO" policy with that prescribed
by the ONFI 3.1 specification that EDO mode should always be used if tRC
is below 30ns.
Signed-off-by: NRoy Spliet <r.spliet@ultimaker.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

The TIMING_CFG register was previously statically set to a magic value
(extracted from Allwinner's BSP) when initializing the NAND controller.
Now that we have more details about the TIMING_CFG register layout
(extracted from the A83 user manual) we can dynamically calculate the
appropriate value for each NAND chip and set it when selecting the
chip.
Signed-off-by: NRoy Spliet <r.spliet@ultimaker.com>
Acked-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Micron n25q064 flash supports 4 KiB erase sectors.
Signed-off-by: NAlexey Firago <alexey_firago@mentor.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

QUADSPI_MCR_CLR_TXF_MASK is the correct mask for clearing the TX FIFO.
Signed-off-by: NAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

r852_ecc_correct() reads a 32-bit register into a 16-bit variable,
ecc_reg, but this variable is later used as if it was larger.  This is
reported by clang when building the kernel with many warnings:

    drivers/mtd/nand/r852.c:512:11: error: shift count >= width of type
    [-Werror,-Wshift-count-overflow]
                    ecc_reg >>= 16;
                            ^   ~~
Fix this by making ecc_reg 32-bit, like the return type of
r852_read_reg_dword().
Signed-off-by: NNicolas Iooss <nicolas.iooss_linux@m4x.org>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

It is needed for k2l keystone2 EVM which uses NAND flash with 4K page
size, hence add support for 4K page size nand devices.

[Brian: similar work submitted by Murali Karicheri <m-karicheri2@ti.com>
and Hao Zhang <hzhang@ti.com>]
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: NIvan Khoronzhuk <ivan.khoronzhuk@ti.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Do not call free_device() in init_nandsim, the caller - ns_init_module -
will take care of that if something goes wrong.
Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

If allocating ns->nand_pages_slab fails, do not try to destroy it when
cleaning up nandsim resources.
Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Add supports for simultaneous access to multiple chips. Need to lock
the mutex before any quad spi operations and unlock the mutex after
operations complete.
Signed-off-by: NHan Xu <b45815@freescale.com>
[Brian: reworked err path in fsl_qspi_prep()]
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

kasprintf() does a dynamic memory allocation and can fail.
We have to handle that case.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

kasprintf() used in get_partition_name() does a dynamic
memory allocation and can fail. We have to handle that case.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

kasprintf() does a dynamic memory allocation and can fail.
We have to handle that case.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

device_create_file() can fail, therefore we have to
handle this case and abort.
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

Signed-off-by: NBrian Norris <computersforpeace@gmail.com>

It makes more sense to return error statuses, not 1/0.
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
Reviewed-by: NRichard Weinberger <richard@nod.at>

It is a Bad Idea (TM) to call mtd_device_register() or
mtd_device_parse_register() twice on the same master MTD. Among other
things, it makes partition overrides (e.g., cmdlinepart) much more
difficult.

Since commit 727dc612 ("mtd: part: Create the master device node
when partitioned"), we now have a config option that accomplishes the
same purpose as the double-registration done in diskonchip.c -- it
forces the master MTD to *always* be registered, while partitions may
optionally show up in addition. Eventually, we might like to make
CONFIG_MTD_PARTITIONED_MASTER into the default, but this could be
disruptive to user-space expectations of MTD numbering, so we'll take
that slowly.
Signed-off-by: NBrian Norris <computersforpeace@gmail.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Alexander Shiyan <shc_work@mail.ru>

Powerpc powernv platforms allow access to certain system flash devices
through a firmwarwe interface. This change adds an mtd driver for these
flash devices.

Minor updates from Jeremy Kerr and Joel Stanley.
Signed-off-by: NCyril Bur <cyrilbur@gmail.com>
Signed-off-by: NJoel Stanley <joel@jms.id.au>
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>
Reviewed-by: NNeelesh Gupta <neelegup@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>

With the planned cgroup writeback support, backing-dev related
declarations will be more widely used across block and cgroup;
unfortunately, including backing-dev.h from include/linux/blkdev.h
makes cyclic include dependency quite likely.

This patch separates out backing-dev-defs.h which only has the
essential definitions and updates blkdev.h to include it.  c files
which need access to more backing-dev details now include
backing-dev.h directly.  This takes backing-dev.h off the common
include dependency chain making it a lot easier to use it across block
and cgroup.

v2: fs/fat build failure fixed.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reviewed-by: NJan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: NJens Axboe <axboe@fb.com>

This patch cleans up the manual device_create_file() or
class_create_file() calls by replacing with static attribute groups.
It simplifies the code and also avoids the possible races between the
device/class registration and sysfs creations.

For the simplification, also make ubi_class a static instance with
initializers, too.

Amend a bit by Hujianyang.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Tested-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: Nhujianyang <hujianyang@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>

Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>

During fastmap attaching, check if a volume already exists when adding
the volume to volume tree. NOTE that the issue cannot happen, only if
the on-flash fastmap data is modified.
Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>

`vol' is a newly allocated value by kzalloc. Initialize it by assignment
instead of `+='.
Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>

s/fmpl1/fmpl
s/fmpl2/fmpl_wl

Add "WL" to the error message when wrong WL pool magic number is detected.
Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>

Signed-off-by: NSheng Yong <shengyong1@huawei.com>
Signed-off-by: NRichard Weinberger <richard@nod.at>