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>
This fixes a memory leak in the ONFI support code for detecting the
required ECC levels from this commit:
commit 6dcbe0cdd8
Author: Huang Shijie <b32955@freescale.com>
Date: Wed May 22 10:28:27 2013 +0800
mtd: get the ECC info from the Extended Parameter Page
In the success case, we never freed the 'ep' buffer.
Also, this fixes an oversight in the same commit where we (harmlessly)
freed the NULL pointer.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
There's no need to enclose this code within idef CONFIG_OF,
because the OF framework provides no-op stubs if CONFIG_OF=n.
Cc: devicetree@vger.kernel.org
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
- nand-gpio cleanup and portability to non-ARM
- m25p80 support for 4-byte addressing chips, other new chips
- pxa3xx cleanup and support for new platforms
- remove obsolete alauda, octagon-5066 drivers
- erase/write support for bcm47xxsflash
- improve detection of ECC requirements for NAND, controller setup
- NFC acceleration support for atmel-nand, read/write via SRAM
- etc.
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Merge tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd
Pull mtd updates from David Woodhouse:
- factor out common code from MTD tests
- nand-gpio cleanup and portability to non-ARM
- m25p80 support for 4-byte addressing chips, other new chips
- pxa3xx cleanup and support for new platforms
- remove obsolete alauda, octagon-5066 drivers
- erase/write support for bcm47xxsflash
- improve detection of ECC requirements for NAND, controller setup
- NFC acceleration support for atmel-nand, read/write via SRAM
- etc
* tag 'for-linus-20130909' of git://git.infradead.org/linux-mtd: (184 commits)
mtd: chips: Add support for PMC SPI Flash chips in m25p80.c
mtd: ofpart: use for_each_child_of_node() macro
mtd: mtdswap: replace strict_strtoul() with kstrtoul()
mtd cs553x_nand: use kzalloc() instead of memset
mtd: atmel_nand: fix error return code in atmel_nand_probe()
mtd: bcm47xxsflash: writing support
mtd: bcm47xxsflash: implement erasing support
mtd: bcm47xxsflash: convert to module_platform_driver instead of init/exit
mtd: bcm47xxsflash: convert kzalloc to avoid invalid access
mtd: remove alauda driver
mtd: nand: mxc_nand: mark 'const' properly
mtd: maps: cfi_flagadm: add missing __iomem annotation
mtd: spear_smi: add missing __iomem annotation
mtd: r852: Staticize local symbols
mtd: nandsim: Staticize local symbols
mtd: impa7: add missing __iomem annotation
mtd: sm_ftl: Staticize local symbols
mtd: m25p80: add support for mr25h10
mtd: m25p80: make CONFIG_M25PXX_USE_FAST_READ safe to enable
mtd: m25p80: Pass flags through CAT25_INFO macro
...
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 e534ee4f9c
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>
Use for_each_child_of_node() macro instead of open coding it.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.
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>
It's cleaner to use kzalloc() instead of zeroing out in a separate call
to memset().
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Tested with BCM4706.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
convert to module_platform_driver instead of init/exit
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Libo chen <libo.chen@huawei.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
mtd is just member of bcm47xxsflash, so we should free bcm47xxsflash not
its member. So I use devm_kazlloc instead of kazlloc to avoid it.
* Changelog:
convert to devm_kzalloc
Signed-off-by: Libo chen <libo.chen@huawei.com>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
[Brian: fixed conflicts]
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The driver has very low utility. Devices in question are limited to
about 400kB/s and the only known user (me) discarded the hardware
several years back.
Signed-off-by: Joern Engel <joern@logfs.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The values pointed by the pointer are used as read-only.
Also, mtd_device_parse_register() uses 'part_probes[]' as
the second argument which is defined as 'const char * const *types'.
Thus, the 'const' should be moved to be after the '*'.
drivers/mtd/nand/mxc_nand.c:269:25: warning: duplicate const
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>
Added missing __iomem annotation and staticized local symbols
in order to fix the following sparse warnings:
drivers/mtd/maps/cfi_flagadm.c:58:17: warning: symbol 'flagadm_map' was not declared. Should it be static?
drivers/mtd/maps/cfi_flagadm.c:64:22: warning: symbol 'flagadm_parts' was not declared. Should it be static?
drivers/mtd/maps/cfi_flagadm.c:115:18: warning: cast removes address space of expression
drivers/mtd/maps/cfi_flagadm.c:115:18: warning: incorrect type in argument 1 (different address spaces)
drivers/mtd/maps/cfi_flagadm.c:115:18: expected void volatile [noderef] <asn:2>*addr
drivers/mtd/maps/cfi_flagadm.c:115:18: got void *<noident>
drivers/mtd/maps/cfi_flagadm.c:126:26: warning: cast removes address space of expression
drivers/mtd/maps/cfi_flagadm.c:126:26: warning: incorrect type in argument 1 (different address spaces)
drivers/mtd/maps/cfi_flagadm.c:126:26: expected void volatile [noderef] <asn:2>*addr
drivers/mtd/maps/cfi_flagadm.c:126:26: got void *<noident>
drivers/mtd/maps/cfi_flagadm.c:127:36: warning: Using plain integer as NULL pointer
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>
These local symbols are used only in this file.
Fix the following sparse warnings:
drivers/mtd/nand/r852.c:232:6: warning: symbol 'r852_write_buf' was not declared. Should it be static?
drivers/mtd/nand/r852.c:264:6: warning: symbol 'r852_read_buf' was not declared. Should it be static?
drivers/mtd/nand/r852.c:315:6: warning: symbol 'r852_cmdctl' was not declared. Should it be static?
drivers/mtd/nand/r852.c:360:5: warning: symbol 'r852_wait' was not declared. Should it be static?
drivers/mtd/nand/r852.c:389:5: warning: symbol 'r852_ready' was not declared. Should it be static?
drivers/mtd/nand/r852.c:400:6: warning: symbol 'r852_ecc_hwctl' was not declared. Should it be static?
drivers/mtd/nand/r852.c:432:5: warning: symbol 'r852_ecc_calculate' was not declared. Should it be static?
drivers/mtd/nand/r852.c:464:5: warning: symbol 'r852_ecc_correct' was not declared. Should it be static?
drivers/mtd/nand/r852.c:532:6: warning: symbol 'r852_engine_enable' was not declared. Should it be static?
drivers/mtd/nand/r852.c:550:6: warning: symbol 'r852_engine_disable' was not declared. Should it be static?
drivers/mtd/nand/r852.c:560:6: warning: symbol 'r852_card_update_present' was not declared. Should it be static?
drivers/mtd/nand/r852.c:575:6: warning: symbol 'r852_update_card_detect' was not declared. Should it be static?
drivers/mtd/nand/r852.c:589:9: warning: symbol 'r852_media_type_show' was not declared. Should it be static?
drivers/mtd/nand/r852.c:600:1: warning: symbol 'dev_attr_media_type' was not declared. Should it be static?
drivers/mtd/nand/r852.c:604:6: warning: symbol 'r852_update_media_status' was not declared. Should it be static?
drivers/mtd/nand/r852.c:633:5: warning: symbol 'r852_register_nand_device' was not declared. Should it be static?
drivers/mtd/nand/r852.c:671:6: warning: symbol 'r852_unregister_nand_device' was not declared. Should it be static?
drivers/mtd/nand/r852.c:685:6: warning: symbol 'r852_card_detect_work' was not declared. Should it be static?
drivers/mtd/nand/r852.c:824:6: warning: symbol 'r852_probe' was not declared. Should it be static?
drivers/mtd/nand/r852.c:964:6: warning: symbol 'r852_remove' was not declared. Should it be static?
drivers/mtd/nand/r852.c:995:6: warning: symbol 'r852_shutdown' was not declared. Should it be static?
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>
These local symbols are used only in this file.
Fix the following sparse warnings:
drivers/mtd/nand/nandsim.c:1436:5: warning: symbol 'do_read_error' was not declared. Should it be static?
drivers/mtd/nand/nandsim.c:1448:6: warning: symbol 'do_bit_flips' was not declared. Should it be static?
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>
Added missing __iomem annotation and used NULL instead of 0
in order to fix the following sparse warnings:
drivers/mtd/maps/impa7.c:82:32: warning: Using plain integer as NULL pointer
drivers/mtd/maps/impa7.c:96:34: warning: cast removes address space of expression
drivers/mtd/maps/impa7.c:96:34: warning: incorrect type in argument 1 (different address spaces)
drivers/mtd/maps/impa7.c:96:34: expected void volatile [noderef] <asn:2>*addr
drivers/mtd/maps/impa7.c:96:34: got void *<noident>
drivers/mtd/maps/impa7.c:108:34: warning: cast removes address space of expression
drivers/mtd/maps/impa7.c:108:34: warning: incorrect type in argument 1 (different address spaces)
drivers/mtd/maps/impa7.c:108:34: expected void volatile [noderef] <asn:2>*addr
drivers/mtd/maps/impa7.c:108:34: got void *<noident>
drivers/mtd/maps/impa7.c:109:45: warning: Using plain integer as NULL pointer
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>
These local symbols are used only in this file.
Fix the following sparse warnings:
drivers/mtd/sm_ftl.c:25:25: warning: symbol 'cache_flush_workqueue' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:44:9: warning: symbol 'sm_attr_show' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:57:24: warning: symbol 'sm_create_sysfs_attributes' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:110:6: warning: symbol 'sm_delete_sysfs_attributes' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:574:5: warning: symbol 'sm_get_media_info' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:881:17: warning: symbol 'sm_get_zone' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:902:6: warning: symbol 'sm_cache_init' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:912:6: warning: symbol 'sm_cache_put' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:920:5: warning: symbol 'sm_cache_get' was not declared. Should it be static?
drivers/mtd/sm_ftl.c:931:5: warning: symbol 'sm_cache_flush' was not declared. Should it be static?
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>
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>
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>
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>
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>
If NO_DMA=y:
drivers/built-in.o: In function `denali_remove':
drivers/mtd/nand/denali.c:1605: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `denali_read_page_raw':
drivers/mtd/nand/denali.c:1190: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `denali_read_page':
drivers/mtd/nand/denali.c:1140: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `write_page':
drivers/mtd/nand/denali.c:1051: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `denali_init':
drivers/mtd/nand/denali.c:1433: undefined reference to `dma_set_mask'
drivers/mtd/nand/denali.c:1438: undefined reference to `dma_map_single'
drivers/mtd/nand/denali.c:1442: undefined reference to `dma_mapping_error'
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Remove unneeded error handling on the result of a call to
platform_get_resource_byname when the value is passed to devm_ioremap_resource.
A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression pdev,res,e,e1;
expression ret != 0;
identifier l;
@@
res = platform_get_resource_byname(...);
- if (res == NULL) { ... \(goto l;\|return ret;\) }
e = devm_ioremap_resource(e1, res);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The PMECC use BCH algorithm to correct error. In BCH algorithm, the primitive
polynomial value is GF(2^13) for 512-bytes sector size. And it is GF(2^14) for
1024-bytes sector size.
This patch will choose correct degree of the remainders (13 or 14) for
different sector size.
Tested in AT91SAM9X5-EK with MLC nand flash.
More detail can be found in §5.4.1 of:
AT91SAM ARM-based Embedded MPU Application Note
<http://www.atmel.com/Images/doc11127.pdf>
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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>
First, the function argument is 'offset' not 'column'.
Second, the 'data_buf' name is inconsistent with the rest of this file.
Just use 'buf'.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Gupta, Pekon <pekon@ti.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
In order to make the nand_scan() work, the current code uses the hack code
to init the @nand_chip->ecc.size and the @nand_chip->ecc.strength. and
re-init some the ECC info in the gpmi_pre_bbt_scan().
This code is really a little ugly.
The patch does following changes:
(1) Use the nand_scan_ident()/nand_scan_tail() to replace the nand_scan().
(2) Init all the necessary values in the gpmi_init_last()
before we call the nand_scan_tail().
(3) remove the code setting the ECC info, let the mtd layer to do the
real job.
(4) remove the gpmi_scan_bbt(). we do not need this function any more.
Signed-off-by: Huang Shijie <b32955@freescale.com>
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>
We may do some ONFI get/set features operations before we call the
nand_scan_tail().
So move the default ONFI nand hooks into nand_set_defaults().
Signed-off-by: Huang Shijie <b32955@freescale.com>
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>
Set the ecc step size for master/slave mtd_info{}.
Signed-off-by: Huang Shijie <b32955@freescale.com>
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>
Add a new sys node to show the ecc step size.
The application then can uses this node to get the ecc step
size.
Signed-off-by: Huang Shijie <b32955@freescale.com>
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>
There are static checkers which complain when we declare variables as
64 bit bitfields but only use the lower 32 bits because of shift
wrapping. In this case "len" is declared as u64 as opposed to unsigned
long or something which might be 32 bits.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Remove unneeded error handling on the result of a call to
platform_get_resource when the value is passed to devm_ioremap_resource.
Move the call to platform_get_resource adjacent to the call to
devm_ioremap_resource to make the connection between them more clear.
A simplified version of the semantic patch that makes this change is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
expression pdev,res,n,e,e1;
expression ret != 0;
identifier l;
@@
- res = platform_get_resource(pdev, IORESOURCE_MEM, n);
... when != res
- if (res == NULL) { ... \(goto l;\|return ret;\) }
... when != res
+ res = platform_get_resource(pdev, IORESOURCE_MEM, n);
e = devm_ioremap_resource(e1, res);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The create_freezable_workqueue() returns a NULL on error, it doesn't
return an ERR_PTR.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
All callers of mtdtest_write() print the same error message on failure.
This incorporates the error message to mtdtest_write() and removes them
from the callers.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
All callers of mtdtest_read() print the same error message on failure.
This incorporates the error message to mtdtest_read() and removes them
from the callers.
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The Armada 370 and Armada XP SoC families, selected by PLAT_ORION,
have a Nand Flash Controller (NFC) IP very similar to the one present
in PXA platforms. Therefore, we want to build this driver on PLAT_ORION.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
When use_dma=0 there's no point in requesting resources for dma,
since they won't be used anyway. Therefore we remove that requirement,
therefore allowing devices without dma to pass the driver probe.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Now that we have added ARCH_HAS_DMA conditional the function
enable_int() may be unused. Declare it as __maybe_unused,
in order to remove the following warning, when the function is not used:
drivers/mtd/nand//pxa3xx_nand.c:343:24: warning: 'enable_int' defined
but not used [-Wunused-function]
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This patch adds a macro ARCH_HAS_DMA to compile-out arch specific
dma code, namely pxa_request_dma() and pxa_free_dma(). These symbols
are available only in pxa, which makes impossible to build the driver in
other platforms than ARCH_PXA.
In order to handle non-dma capable platforms, we implement a fallbacks that
allocate buffers as if 'use_dma=false', putting the dma related code
under the ARCH_HAS_DMA conditional.
Please note that the correct way to handle this is to migrate the
dma code to use of the mmp_pdma dmaengine driver. However, currently
this is not possible because the two dmaengine drivers can't work together.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This registers are not per-chip (aka host) but controller-wide,
so it's better to store them in the global 'info' structure.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Use the defined macros for NAND command instead of using a constant
internal structure. This commit is only a cleanup, there's no
functionality modification.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
There's no advantage in using a hardcoded name for the mtd device.
Instead use the provided by the platform_device.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This is just a cosmetic change, to make the code more readable.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
The ONFI command 'parameter page read' needs a non-standard length.
Therefore, we enable the 'length override' field in NDCB0 and set
a non-zero 'length count' in NDCB3.
Additionally, the 'spare enable' bit must be disabled for any command
that sets a non-zero 'length count' in NDCB3.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Some newer controllers support a fourth command buffer. This additional
command buffer allows to set an arbitrary length count, using the
NDCB3.NDLENCNT field, to perform non-standard length operations
such as the ONFI parameter page read.
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
