- 25 May, 2011 39 commits
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Jamie Iles authored
If we don't have OpenFirmware enabled then provide a stub of_mtd_parse_partitions that returns no partitions so drivers don't need ifdeffery inside. Signed-off-by:
Jamie Iles <jamie@jamieiles.com> Signed-off-by:
Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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Jamie Iles authored
To prepare for the removal of add_mtd_device and add_mtd_partitions(), introduce mtd_device_register(). This will create partitions if they are supplied or register the whole device if there are no partitions. Once all drivers are converted to use mtd_device_register(), add_mtd_device() and add_mtd_partitions() will be made internal only. v2: move kerneldoc to implementation file and fixup some kerneldoc warnings. Artem: tweak comments: remove junk tabs, use dots consistently. Signed-off-by:
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Jamie Iles authored
There are very few situations where MTD partitioning is not required, and the benefit in code size reduction by making this configurable does not warrant the level of ifdeffery needed. Artem: this patch is not final - we just make sure that mtd partitions are always compiled in, and at the end of the series we'll kill MTD_PARTITIONS altogether. Signed-off-by:
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Wanlong Gao authored
Remove the spare spaces in the head of the lines. Signed-off-by:
Wanlong Gao <wanlong.gao@gmail.com> Signed-off-by:
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Maxin B. John authored
This patch fixes the possible null dereference of the variable "oinfo" Thanks to Coverity for spotting this. Signed-off-by:
Maxin B. John <john.maxin@nokia.com> Signed-off-by:
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Tadashi Abe authored
This is a trivial patch which removes unnecessary assignment of chip->state in put_chip(). It's duplicated. Signed-off-by:
Tadashi Abe <tabe@mvista.com> Acked-by:
Joakim Tjernlund <joakim.tjernlund@transmode.se> Signed-off-by:
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Tadashi Abe authored
cfi erase command hangs up when erase and read contention occurs. If read runs at the same address as erase operation, read issues Erase-Suspend via get_chip() and the erase goes into sleep in wait queue. But in this case, read operation exits by time-out without waking it up. I think the other variants (0001, 0020 and lpddr) have the same problem too. Tested and verified the patch only on CFI-0002 flash, though. Signed-off-by:
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Wanlong Gao authored
'get_mtd_device_nm()' has a piece of code which equivalent to what '__get_mtd_device()' does - remove this duplicated code and use ''__get_mtd_device()' instead. Artem: changed commit message. Artem: while on it, remove an unnecessary extra empty line Signed-off-by:
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Artem Bityutskiy authored
Currently when we register partitions in 'parse_mtd_partitions()' we accept the list of parsers we should try. And if one of the parsers was not found we print a message. Well, first of all this whole idea is bad - look at how many 'part_probes' and 'part_probe_types' variables we have - nearly every driver defines one. Instead, we should just go through all registered parsers all the time. But this needs to be worked on separately. This patch makes life of MTD partitions' users a bit simpler and allows them to safely request parsers which have not been registered - 'parse_mtd_partitions()' will not print a "not available" message in this case. The point is that drivers do not have to do things like this any longer: static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs", NULL }; but can simply do like this: static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs", NULL }; Signed-off-by: -
Alexey Dobriyan authored
->read_proc interface is going away, switch to seq_file. Signed-off-by:
Alexey Dobriyan <adobriyan@gmail.com> Acked-by:
Mike Frysinger <vapier@gentoo.org> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Kishore Kadiyala authored
When reading/writing a subpage (When HW ECC is not available/enabled) for number of bytes not aligned to 4, the mis-aligned bytes are handled first (by cpu copy method) before enabling the Prefetch engine to/from 'p'(start of buffer 'buf'). Then it reads/writes rest of the bytes with the help of Prefetch engine, if available, or again using cpu copy method. Currently, reading/writing of rest of bytes, is not done correctly since its trying to read/write again to/from begining of buffer 'buf', overwriting the mis-aligned bytes. Read & write using prefetch engine got broken in commit '2c01946c'. We never hit a scenario of not getting 'gpmc_prefetch_enable' call success. So, problem did not get caught up. Signed-off-by:
Kishore Kadiyala <kishore.kadiyala@ti.com> Signed-off-by:
Vimal Singh <vimal.newwork@gmail.com> Reported-by:
Bryan DE FARIA <bdefaria@adeneo-embedded.com> Cc: stable@kernel.org [2.6.35+] Signed-off-by:
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Mike Frysinger authored
The previous section mismatch fix for this driver wasn't entirely correct. The sst25l_flash_info array is now used in the devinit probe func, but is marked as initdata, so building results in the warning: WARNING: drivers/mtd/devices/sst25l.o(.devinit.text): Section mismatch in reference from the function sst25l_probe() to the variable .init.data:sst25l_flash_info Further, the remove func should be devexit rather than exit to match the probe func. Signed-off-by:
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Kevin Cernekee authored
S25FL512S = 64MiB single die, same family as S25FL256S S70FL01GS = 2x S25FL512S dies in one package (separate chip selects) These devices are not sampling yet, but they are expected to be very similar to S25FL256S, which has been tested. Signed-off-by:
Kevin Cernekee <cernekee@gmail.com> Signed-off-by:
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Kevin Cernekee authored
These are 32MiB parts which use a slightly different 4-byte enable sequence from Macronix. Default to the Spansion 4-byte scheme in set_4byte(), as it is more likely to be copied by other vendors. Signed-off-by:
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Kevin Cernekee authored
Use the manufacturer ID names from cfi.h instead of hard-coding hex constants. Introduce a JEDEC_MFR macro for clarity. Signed-off-by:
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Kevin Cernekee authored
Signed-off-by:
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Jamie Iles authored
Not all configurations of the Denali controller support 4 banks. The controller can support between 1 and 16 banks. Detect this from the design features register. Signed-off-by:
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Jamie Iles authored
The controller has interrupt enable/status register pairs for each bank (along with ECC and status registers) that differ only in address offset. Rather than providing definitions for each register, make the address a macro so that it scales for devices with different numbers of banks. Signed-off-by:
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Jamie Iles authored
Rather than using the PCI specific DMA API, convert to the generic DMA API so that we can use the Denali NAND controller on other bus types. Signed-off-by:
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john.maxin@nokia.com authored
Coverity has reported that inside the function "onenand_block_by_block_erase()" in onenand_base.c, we should add a check to prevent the incrementing of possible NULL value for "region" Signed-off-by:
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Artem Bityutskiy authored
In commit c7b28e25 the initialization of the backblockbits was accidentally removed. This patch returns it back, because otherwise some NAND drivers are broken. This problem was reported by "Saxena, Parth <parth.saxena@ti.com>" here: http://lists.infradead.org/pipermail/linux-mtd/2011-April/035221.htmlReported-by:
Saxena, Parth <parth.saxena@ti.com> Signed-off-by:
Brian Norris <computersforpeace@gmail.com> Cc: stable@kernel.org [2.6.36+] Signed-off-by:
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Felix Radensky authored
This patch extends NDFC driver to support all 4 chip selects available in NDFC NAND controller. Tested on custom 460EX board with 2 chip select NAND device. Artem: white-space cleanups Signed-off-by:
Felix Radensky <felix@embedded-sol.com> Signed-off-by:
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Grant Erickson authored
Replace direct call to kmalloc for a potentially large, contiguous buffer allocation with one to mtd_kmalloc_up_to which helps ensure the operation can succeed under low-memory, highly- fragmented situations albeit somewhat more slowly. Signed-off-by:
Grant Erickson <marathon96@gmail.com> Signed-off-by:
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Grant Erickson authored
Replace direct call to kmalloc for a potentially large, contiguous buffer allocation with one to mtd_kmalloc_up_to which helps ensure the operation can succeed under low-memory, highly- fragmented situations albeit somewhat more slowly. Signed-off-by:
Ben Gardiner <bengardiner@nanometrics.ca> Tested-by:
Stefano Babic <sbabic@denx.de> Signed-off-by:
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Grant Erickson authored
Introduce a common function to handle large, contiguous kmalloc buffer allocations by exponentially backing off on the size of the requested kernel transfer buffer until it succeeds or until the requested transfer buffer size falls below the page size. This helps ensure the operation can succeed under low-memory, highly- fragmented situations albeit somewhat more slowly. Artem: so this patch solves the problem that the kernel tries to kmalloc too large buffers, which (a) may fail and does fail - people complain about this, and (b) slows down the system in case of high memory fragmentation, because the kernel starts dropping caches, writing back, swapping, etc. But we do not really have to allocate a lot of memory to do the I/O, we may do this even with as little as one min. I/O unit (NAND page) of RAM. So the idea of this patch is that if the user asks to read or write a lot, we try to kmalloc a lot, with GFP flags which make the kernel _not_ drop caches, etc. If we can allocate it - good, if not - we try to allocate twice as less, and so on, until we reach the min. I/O unit size, which is our last resort allocation and use the normal GFP_KERNEL flag. Artem: re-write the allocation function so that it makes sure the allocated buffer is aligned to the min. I/O size of the flash. Signed-off-by:
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Felix Radensky authored
Currently mtdconcat is broken for NAND. An attemtpt to create JFFS2 filesystem on concatenation of several NAND devices fails with OOB write errors. This patch fixes that problem. Signed-off-by:
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Jan Weitzel authored
nand_scan calls nand_scan_tail and here we got a ecc.layout and calculate oobavail for this layout. After calling nand_scan, we change the layout pointer if OMAP_ECC_HAMMING_CODE_HW_ROMCODE is set. This results in not calcluated oobavail. Mountig as jffs2 is not possible. To fix that nand_scan has to split up in nand_scan_ident and nand_scan_tail setting ecc.layout between these calls. So nand_scan_tail calculates oobvail for the used layout. This is also done in serveral other platforms. Signed-off-by:
Jan Weitzel <j.weitzel@phytec.de> Reviewed-by:
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Artem Bityutskiy authored
The 'blktrans_open()' does not handle possible '__get_mtd_device()' failures because it does not check the error code. Moreover, the 'dev->tr->open()' failures are not handled correctly because in this case the function just goes ahead and gets the mtd device, then returns an error. But Instead, it should _not_ try to get the mtd device, then it should put back the module and the kref. This patch fixes the issue. Note, I only compile-tested it. This patch was inspired by a bug report about a similar issue in 2.6.34 kernels sent by Mike Turner <admin@islandsoftware.co.uk> to the MTD mailing list: http://lists.infradead.org/pipermail/linux-mtd/2011-April/034980.htmlSigned-off-by:
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Hans-Christian Egtvedt authored
Including linux/dmaengine.h fixes the missing definition of the enum dma_ctrl_flags type used in atmel_nand_dma_op function. Signed-off-by:
Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Signed-off-by:
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Jiri Pinkava authored
Chip deselection is already done in nand_release_device. So only duplicate code. Signed-off-by:
Jiri Pinkava <jiri.pinkava@vscht.cz> Signed-off-by:
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Jiri Pinkava authored
Current implementation of s3c2410_nand_select_chip call clk_disable every time when chip = -1 (de-select). This happend multiple times even if chip was already de-selected. This causes disabling clock even if they are already disabled and due to nature of clock subsytem implementation this causes nand clock to be disabled and newer enabled again. Signed-off-by:
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Gernot Hoyler authored
This patch adds CFI 1.5 support for the new Spansion S29GL-S device family. For details, see the data sheet on the Spansion web site: http://www.spansion.com/Support/Datasheets/S29GL_128S_01GS_00_02_e.pdfSigned-off-by:
Gernot Hoyler <Gernot.Hoyler@spansion.com> Acked-by:
Guillaume LECERF <glecerf@gmail.com> Signed-off-by:
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Roman Tereshonkov authored
So as the ecclayout and suppage size for 4KiB page Flex- and none-Flex OneNAND are different the new values for none-Flex 4KiB page OneNAND memory are added. The introduced ecclayout and suppage size are based on specification 4Gib M-die OneNAND Flash (KFM4G16Q4M, KFN8G16Q4M). Rev. 1.3, Apr. 2010 For eccpos we expose only 64 bytes out of 72, for oobfree the spare area fields marked as "Managed by internal ECC logic for Logical Sector Number area" are used. Signed-off-by:
Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by:
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Michal Marek authored
The kernel already prints its build timestamp during boot, no need to repeat it in random drivers and produce different object files each time. Signed-off-by:
Michal Marek <mmarek@suse.cz> Signed-off-by:
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Brian Norris authored
It is nicer to dynamically create our badblock patterns than to statically define them. The nand_create_default_bbt_descr() function does a sufficient job of handling various bad block scanning options for either flash-based or non-flash-based BBTs, so we might as well use the function for both cases. This patch simplifies and shortens our code (and removes a TODO that I left a few months ago). Signed-off-by:
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Brian Norris authored
The NAND_USE_FLASH_BBT_NO_OOB and NAND_CREATE_EMPTY_BBT flags conflict with the NAND_BBT_SCANBYTE1AND6 and NAND_BBT_DYNAMICSTRUCT flags, respectively. This change will allow us to utilize these options independently. Signed-off-by:
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Gabor Juhos authored
Signed-off-by:
Gabor Juhos <juhosg@openwrt.org> Signed-off-by:
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Sergey Senozhatsky authored
Remove unused 'jffs2_sb_info *c' variable from 'jffs2_lookup()' and 'jffs2_readdir()'. Signed-off-by:
Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Signed-off-by:
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Baruch Siach authored
Do the following to add support for up to 4 chips on V21 devices (i.MX25 and i.MX35): * implement .select_chip for V21 * adjust existing NFC_V1_V2_BUF_ADDR writes to take chip select into account * unlock all chip selects at preset_v1_v2() * scan up to 4 devices at .probe This has been tested on i.MX25 with two attached NAND chip (on one die). Signed-off-by:
Baruch Siach <baruch@tkos.co.il> Signed-off-by:
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- 19 May, 2011 1 commit
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Linus Torvalds authored
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