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Commit 03e296f613affcc2671c1e86d8c25ecad867204e ("mtd: m25p80: use the SPI
nor framework") accidentally removed support for Dual SPI read transfers.
Add it back.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Qualify these with a better namespace, and prepare them for use in more
drivers.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Acked-by: Huang Shijie <b32955@freescale.com>
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Use the new SPI nor framework, and rewrite the m25p80:
(0) remove all the NOR comands.
(1) change the m25p->command to an array.
(2) implement the necessary hooks, such as m25p80_read/m25p80_write.
Tested with the m25p32.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
[Brian: rebased]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
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Signed-off-by: Yusuke Goda <yusuke.goda.sx@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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For slightly better readability.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>. Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
[Brian: dropped one incorrect hunk]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Spansion s25fl256s1 and s25fl512s support Dual SPI transfers, hence set the
M25P80_DUAL_READ flag.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Add support for Dual SPI read transfers, which is supported by some
Spansion SPI FLASHes.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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When using the Quad Read opcode, SPI masters still use Single SPI
transfers, as spi_transfer.rx_nbits defaults to SPI_NBITS_SINGLE.
Use SPI_NBITS_QUAD to fix this.
While an earlier version of commit 3487a63955c34ea508bcf4ca5131ddd953876e2d
("drivers: mtd: m25p80: add quad read support") did this correctly, it was
forgotten in the version that got merged.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Spansion s25fl512s supports Quad SPI transfers, hence set the
M25P80_QUAD_READ flag.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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In the following commit (in -next):
commit 8552b439aba7f32063755d23f79ca27b4d0a3115
drivers: mtd: m25p80: convert "bool" read check into an enum
We converted the boolean 'fast_read' property to become an enum
'flash_read', but at the same time, we changed the conditional path so
that it doesn't choose a default value in some cases (technically, we
choose the correct default simply by virtue of devm_kzalloc(), which
zeroes this out to be a NORMAL read operation, but still...).
Fix this by setting a default for the 'else' clause.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Sourav Poddar <sourav.poddar@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
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commit 3487a63955c34ea508bcf4ca5131ddd953876e2d ("drivers: mtd: m25p80: add
quad read support") in -next added both the 3-byte OPCODE_QUAD_READ and the
4-byte OPCODE_QUAD_READ_4B, but incorrectly uses OPCODE_QUAD_READ for both
3-byte and 4-byte addressing.
Use OPCODE_QUAD_READ_4B in the 4-byte case to fix this.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Add support for Micron m25px16 spi flash chip.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Some flash also support quad read mode. Adding support for quad read
mode in m25p80 for Spansion and Macronix flash.
[Tweaked by Brian]
With this patch, quad-read support will override fast-read and
normal-read, if the SPI controller and flash chip both support it.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Tested-by: Sourav Poddar <sourav.poddar@ti.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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This is a cleanup prior to adding quad read support. This will facilitate
easy addition of more read commands check under an enum rather that defining a
separate bool for it.
Signed-off-by: Sourav Poddar <sourav.poddar@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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Device removal should fail if MTD unregistration fails.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
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A new 32Mbit SPI NOR flash from Macronix. Nothing special.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
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It seems like the following commit was never necessary
commit 5f949137952020214cd167093dd7be448f21c079
Author: Shaohui Xie <Shaohui.Xie@freescale.com>
Date: Fri Oct 14 15:49:00 2011 +0800
mtd: m25p80: don't probe device which has status of 'disabled'
because it duplicates the code in of_platform_device_create_pdata()
which ensures that 'disabled' nodes are never instantiated.
Also, drop the __maybe_unused.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Sourav Poddar <sourav.poddar@ti.com>
Reviewed-by: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: <devicetree@vger.kernel.org>
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Remove the compile-time option for FAST_READ, since we have run-time
support for detecting it. This refactors the logic for enabling
fast-read, such that for DT-enabled devices, we honor the
"m25p,fast-read" property but for non-DT devices, we default to using
FAST_READ whenever the flash device supports it.
Normal READ and FAST_READ differ only in the following:
* FAST_READ supports SPI higher clock frequencies [1]
* number of dummy cycles; FAST_READ requires 8 dummy cycles (whereas
READ requires 0) to allow the flash sufficient setup time, even when
running at higher clock speeds
Thus, for flash chips which support FAST_READ, there is otherwise no
limiting reason why we cannot use the FAST_READ opcode instead of READ.
It simply allows the SPI controller to run at higher clock rates. So
theoretically, nobody should be needing the compile-time option anyway.
[1] I have a Spansion S25FL128S datasheet which says:
"The maximum operating clock frequency for the READ command is 50
MHz."
And:
"The maximum operating clock frequency for FAST READ command is 133
MHz."
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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No change in the table data.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Sourav Poddar <sourav.poddar@ti.com>
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The FIXME and NOTE have already been fixed (we have FAST_READ support).
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Sourav Poddar <sourav.poddar@ti.com>
Acked-by: Marek Vasut <marex@denx.de>
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This patch fixes two memory errors:
1. During a probe failure (in mtd_device_parse_register?) the command
buffer would not be freed.
2. The command buffer's size is determined based on the 'fast_read'
boolean, but the assignment of fast_read is made after this
allocation. Thus, the buffer may be allocated "too small".
To fix the first, just switch to the devres version of kzalloc.
To fix the second, increase MAX_CMD_SIZE unconditionally. It's not worth
saving a byte to fiddle around with the conditions here.
This problem was reported by Yuhang Wang a while back.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reported-by: Yuhang Wang <wangyuhang2014@gmail.com>
Reviewed-by: Sourav Poddar <sourav.poddar@ti.com>
Cc: <stable@vger.kernel.org>
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Micron N25Q512A is a spi flash memory with following features:
-64MB size, 1.8V, Mulitple I/O, 4KB Sector erase memory.
-Memory is organised as 1024(64KB) main sectors.
-Each sector is divided into 256 pages.
-Register set/Opcodes are similar to other N25Q family products.
Signed-off-by: Priyanka Jain <Priyanka.Jain@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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This flashchip is used in D-Link DIR-610 A1 router board
and maybe several others, yet is not kernel upstream.
So add support for it according to datasheet [0], making it easier
to support other boards using this flashchip in the future.
[0] http://www.esmt.com.tw/DB/manager/upload/F25L32PA.pdf
Signed-off-by: Flavio Silveira <fggs@terra.com.br>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
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According to the datasheet for Micron n25q256a (N25Q256A13ESF40F) 4-byte
addressing mode should be entered as follows:
<quote>
To enter or exit the 4-byte address mode, the WRITE ENABLE command
must be executed to set the write enable latch bit to 1. (Note: The
WRITE ENABLE command must NOT be executed on the N25Q256A83ESF40x and
N25Q256A83E1240x devices.) S# must be driven LOW. The effect of the
command is immediate; after the command has been executed, the write
enable latch bit is cleared to 0.
</quote>
Micron's portable way to perform this for all types of Micron flash
is to first issue a write enable, then switch the addressing mode
followed by a write disable to avoid leaving the flash in a write-
able state.
Signed-off-by: Elie De Brauwer <eliedebrauwer@email.com>
[Brian: reworked a bit]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Add support for PMC (now Chingis, part of ISSI) Pm25LV512 (512 Kib),
Pm25LV010 (1 Mib) and Pm25LQ032 (32 Mib) SPI Flash chips.
This patch addresses two generations of PMC SPI Flash chips:
- Pm25LV512 and Pm25LV010: these have 4KiB sectors and 32KiB
blocks. The 4KiB sector erase uses a non-standard opcode
(0xd7). They do not support JEDEC RDID (0x9f), and so they can only
be detected by matching their name string with pre-configured
platform data. Because of the cascaded acquisitions, the datasheet
is no longer available on the current manufacturer's website,
although it is still commonly used in some recent wireless routers
(<https://forum.openwrt.org/viewtopic.php?pid=186360#p186360>). The
only public datasheet available seems to be on GeoCities:
<http://www.geocities.jp/scottle556/pdf/Pm25LV512-010.pdf>
- Pm25LQ032: a newer generation flash, with 4KiB sectors and 64KiB
blocks. It uses the standard erase and JEDEC read-ID
opcodes. Manufacturer's datasheet is here:
<http://www.chingistek.com/img/Product_Files/Pm25LQ032C%20datasheet%20v1.6.1.pdf>
This patch is resent in order to take into account both Brian Norris
remarks and this upstream patch:
commit e534ee4f9ca29fdb38eea4b0c53f2154fbd8c1ee
Author: Krzysztof Mazur <krzysiek@podlesie.net>
Date: Fri Feb 22 15:51:05 2013 +0100
mtd: m25p80: introduce SST_WRITE flag for SST byte programming
Not all SST devices implement the SST byte programming command.
Some devices (like SST25VF064C) implement only standard m25p80 page
write command.
Now SPI flash devices that need sst_write() are explicitly marked
with new SST_WRITE flag and the decision to use sst_write() is based
on this flag instead of manufacturer id.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Michel Stempin <michel.stempin@wanadoo.fr>
[Brian: fixed conflict]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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This adds support for the Everspin mr25h10 MRAM chip to the m25p80
driver.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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This patch adds a flag to struct flash_info indicating that
fast_read is not supported. This now gives the following logic
when determing whether to enable fastread:
If the flash chip does not support fast_read, then disable it.
Otherwise:
1) enable fast_read if device node contains m25p,fast-read
2) enable fast_read if forced in Kconfig
This makes enabling CONFIG_M25PXX_USE_FAST_READ a safe option
since we no longer enable the fast_read option unconditionally.
For now fast_read is disabled for the everspin mr25h256 and the
catalyst devices. Others may need the flag aswell.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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The flags may have to be overwritten, so add them to the CAT25_INFO
macro.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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of_property_read_bool properly compiles away, no need to ifdef this
for non DT builds.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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For SPI NOR flash that are larger than 128Mbit (16MiB), we need 4 bytes
of address space to reach the entire flash; however, the original SPI
flash protocol used only 3 bytes for the address. So far, the practice
for handling this has been either to use new command opcodes that are
defined to use 4 bytes for their address, or to use special
mode-switching command to configure all traditionally-3-byte-address
commands to take 4 bytes instead.
Macronix and Spansion developed two incompatible methods for
entering/exiting "4-byte address mode." Micron flash uses the Macronix
method (OPCODE_{EN4B,EX4B}), not the Spansion method.
This patch solves addressing issues on Micron n25q256a and provides the
ability to support other future Micron SPI flash >16MiB.
Quoting a Micron representative:
"Majority of our NOR that needs 4-byte addressing (256Mb or 32MB and
higher) enter and exit 4byte through B7h and E9h commands. The
N25Q256A7xxx and N25Q512A7xxx parts do not support 4-byte addressing
mode via B7h or E9h command."
They further clarified that those that don't support the enter/exit
opcodes (B7h/E9h) are manufactured specifically to come up by default in
4-byte mode. We don't need to treat those parts any diffently, as they
will discard the EN4B opcode as a no-op.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Added a 16MiB winbond devce to the device list
erase size = 64KiB and number of blocks = 256.
Signed-off-by: Girish K S <ks.giri@samsung.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Traditionally, the command set used by SPI flash only supported a 3-byte
address. However, large SPI flash (>= 32MiB, or 256Mib) require 4 bytes
to address the entire flash. Most manufacturers have supplied a mode
switch (via a "bank register writer", or a "enable 4-byte mode"
command), which tells the flash to expect 4 address cycles from now on,
instead of 3. This mode remains until power is cut, the reset line is
triggered (on packages where present), or a command is sent to reset the
flash or to reset the 3-byte addressing mode.
As an alternative, some flash manufacturers have developed a new command
set that accept a full 4-byte address. They can be used orthogonally to
any of the modes; that is, they can be used when the flash is in either
3-byte or 4-byte address mode.
Now, there are a number of reasons why the "stateful" 4-byte address
mode switch may not be acceptable. For instance, some SoC's perform a
dumb boot sequence in which they only send 3-byte read commands to the
flash. However, if an unexpected reset occurs, the flash chip cannot be
guaranteed to return to its 3-byte mode. Thus, the SoC controller and
flash will not understand each other. (One might consider hooking up the
aforementioned reset pin to the system reset line so that any system
reset will reset the flash to 3-byte mode, but some packages do not
provide this pin. And in some other packages, one must choose between
having a reset pin and having enough pins for 4-output QSPI support.
It is an error prone process choosing a flash that will support a
hardware reset pin!)
This patch provides support for the new stateless command set, so that
we can avoid the problems that come with a stateful addressing mode
change. The flash can be left in "3-byte mode" while still accessing the
entire flash.
Note that Spansion supports this command set on all its large flash
(e.g, S25FL512S), and Macronix has begun supporting this command set on
some new flash (e.g., MX25L25635F). For the moment, I don't know how to
differentiate the Macronix that don't support this command set (e.g.,
MX25L25635E) from those that do, so this patch only supports Spansion.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Use the wrapper functions for getting and setting the driver data using
spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we
can directly pass a struct spi_device.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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This device was reported over a year ago on OpenWrt mailing list in the
thread [OpenWrt-Devel] RedBoot partition table with winbond m25q128vb
(unfortunately, I can't find message id). Macpaul seemed to have
problems with partition driver, but it seems the device was working OK.
Reported-by: Macpaul Lin <macpaul@gmail.com>
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Not all SST devices implement the SST byte programming command.
Some devices (like SST25VF064C) implement only standard m25p80 page
write command.
Now SPI flash devices that need sst_write() are explicitly marked
with new SST_WRITE flag and the decision to use sst_write() is based
on this flag instead of manufacturer id.
Signed-off-by: Krzysztof Mazur <krzysiek@podlesie.net>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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Add support for GigaDevice GD25Q32 32 Mbit (4 MB) SPI Flash (see datasheet:
http://www.gigadevice.com/UserFiles/GD25Q32_Rev0.2(1).pdf) used in Hame MPR-A1
and clones, and for GigaDevice GD25Q64 64 Mbit (8 MB) SPI Flash used in
Hame MPR-A2 devices (datasheet: http://www.gigadevice.com/UserFiles/GD25Q64.pdf).
Signed-off-by: Michel Stempin <michel.stempin@wanadoo.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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This patch adds generic support for flash protection on STmicro chips.
On chips with less than 3 protection bits, the unused bits are don't cares
and so can be written anyway. The lock function will only change the
protection bits if it would not unlock other areas. Similarly, the unlock
function will not lock currently unlocked areas. Tested on the m25p64.
Signed-off-by: Austin Boyle <Austin.Boyle@aviatnet.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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Micron N25Q128 has two types of flash:
- One is for 1.8v supply voltage, prefixed with "n25q128a11" and the jedec
code is 0x20bb18.
- Another is for 3v supply voltage, prefixed with "n25q128a13" and the jedec
code is 0x20ba18.
So modify the original type info and add another type for Micron N25Q128.
Signed-off-by: Liming Wang <walimisdev@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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CONFIG_HOTPLUG is going away as an option so __devexit is no
longer needed.
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer
needed.
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
|
|
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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