- 09 Jan, 2012 40 commits
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Liu Shuo authored
If we use the Nand flash chip whose number of pages in a block is greater than 64(for large page), we must treat the low bit of FBAR as being the high bit of the page address due to the limitation of FCM, it simply uses the low 6-bits (for large page) of the combined block/page address as the FPAR component, rather than considering the actual block size. Signed-off-by:
Liu Shuo <b35362@freescale.com> Signed-off-by:
Jerry Huang <Chang-Ming.Huang@freescale.com> Signed-off-by:
Tang Yuantian <b29983@freescale.com> Signed-off-by:
Li Yang <leoli@freescale.com> Acked-by:
Scott Wood <scottwood@freescale.com> Signed-off-by:
Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> Signed-off-by:
David Woodhouse <David.Woodhouse@intel.com>
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Roman Tereshonkov authored
The array of unsigned long pointed by oops_page_used is allocated by vmalloc which requires the size to be in bytes. BITS_PER_LONG is equal to 32. If we want to allocate memory for 32 pages with one bit per page then 32 / BITS_PER_LONG is equal to 1 byte that is 8 bits. To fix it we need to multiply the result by sizeof(unsigned long) equal to 4. Cc: stable@kernel.org Signed-off-by:
Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by:
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Eric Sandeen authored
after 250df6ed (fs: protect inode->i_state with inode->i_lock), insert_inode_locked() no longer returns the inode with I_NEW set on failure. However, the error handler still calls unlock_new_inode() on failure, which does a WARN_ON if I_NEW is not set, so any failure spews a lot of warnings. We can just drop the unlock_new_inode() if insert_inode_locked() fails here. Signed-off-by:
Eric Sandeen <sandeen@redhat.com> Signed-off-by:
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Jonas Gorski authored
bcm963xx-flash does nothing meaningful anymore. Signed-off-by:
Jonas Gorski <jonas.gorski@gmail.com> Acked-by:
Florian Fainelli <florian@openwrt.org> Signed-off-by:
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Jonas Gorski authored
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Jonas Gorski authored
Arch setup code might want to use their own partition parsers, but still use the generic physmap flash driver. Signed-off-by:
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Jonas Gorski authored
Recent BCM63XX devices support a variety of flash types (parallel, SPI, NAND) and share the partition layout. To prevent code duplication make the CFE partition parsing code a stand alone mtd parser to allow SPI or NAND flash drivers to use it. Signed-off-by:
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Jonas Gorski authored
Replace raw printk's with their pr_XXX equivalent and unify broken up strings so they become grepable. Also replace the PFX definition with a pr_fmt(). Signed-off-by:
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Jonas Gorski authored
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Jonas Gorski authored
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Heiko Schocher authored
Signed-off-by:
Heiko Schocher <hs@denx.de> Signed-off-by:
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Liu Shuo authored
When we do a non-full-page write, the length be set to FBCR should not be 'elbc_fcm_ctrl->index', it should be 'elbc_fcm_ctrl->index - elbc_fcm_ctrl->column'. Signed-off-by:
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Liu Shuo authored
On both of large-page chip and small-page chip, we always should use 'elbc_fcm_ctrl->oob' to set the FPAR_LP_MS/FPAR_SP_MS bit of FPAR, don't use a overflowed 'column' to set it. Signed-off-by:
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Robert Jarzmik authored
This patch takes into account checkpatch, sparse and ECC comments. Signed-off-by:
Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by:
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Roman Tereshonkov authored
Use block_isbad to check and skip the bad blocks reading. This will allow to get rid of the read errors if bad blocks are present initially. Cc: stable@kernel.org Signed-off-by:
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Wolfram Sang authored
stresstest needs at least two eraseblocks. Bail out gracefully if that condition is not met. Fixes the following 'division by zero' OOPS: [ 619.100000] mtd_stresstest: MTD device size 131072, eraseblock size 131072, page size 2048, count of eraseblocks 1, pages per eraseblock 64, OOB size 64 [ 619.120000] mtd_stresstest: scanning for bad eraseblocks [ 619.120000] mtd_stresstest: scanned 1 eraseblocks, 0 are bad [ 619.130000] mtd_stresstest: doing operations [ 619.130000] mtd_stresstest: 0 operations done [ 619.140000] Division by zero in kernel. ... caused by /* Read or write up 2 eraseblocks at a time - hence 'ebcnt - 1' */ eb %= (ebcnt - 1); Cc: stable@kernel.org Signed-off-by:Wolfram Sang <w.sang@pengutronix.de> Signed-off-by:
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Axel Lin authored
This patch converts the drivers in drivers/mtd/* to use the module_platform_driver() macro which makes the code smaller and a bit simpler. Signed-off-by:
Axel Lin <axel.lin@gmail.com> Acked by: Haojian Zhuang <haojian.zhuang@gmail.com> Signed-off-by:
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Robert Jarzmik authored
Add documentation for MSystems disk-on-chip docg3 chips sysfs entries, which enable and disable protection areas, giving or disabling access to the chip's memory. Signed-off-by:
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Dan Carpenter authored
If doc_probe_device() returned an ERR_PTR, then we accidentally saved that to docg3_floors[floor] = mtd; which gets derefenced in the error handling when we call doc_release_device(). I've reworked the error handling to take care of that and hopefully make it a little simpler. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
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Lars-Peter Clausen authored
In ancient times it was necessary to manually initialize the bus field of an spi_driver to spi_bus_type. These days this is done in spi_driver_register(), so we can drop the manual assignment. The patch was generated using the following coccinelle semantic patch: // <smpl> @@ identifier _driver; @@ struct spi_driver _driver = { .driver = { - .bus = &spi_bus_type, }, }; // </smpl> Signed-off-by:Lars-Peter Clausen <lars@metafoo.de> Signed-off-by:
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Robert Jarzmik authored
As each docg3 chip has 2 protection areas (DPS0 and DPS1), and because theses areas can prevent user access to the chip data, add for each floor the sysfs entries which insert the protection key into the right DPS. Signed-off-by:
Ivan Djelic <ivan.djelic@parrot.com> Reviewed-by:
Mike Dunn <mikedunn@newsguy.com> Signed-off-by:
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Robert Jarzmik authored
Docg3 chips can work in 3 modes : normal MLC mode, fast mode and reliable mode. Normally, as docg3 is a MLC chip, it should be configured to work in normal mode. In both normal mode, each page is distinct. This means that writing to page 12 of blocks 14,15 writes only to that page, and reading from page 12 of blocks 14,15 reads only from that page. In reliable and fast modes, pages are coupled by pairs, and are clones one of each other. This means that the available capacity of the chip is halved. Pages are coupled in each block, and page of index 2*n contains the same data as page 2*n+1 of the same block. In fast mode, the reads occur a bit faster, but are a bit less reliable that in normal mode. When reading from page 2*n, the chip reads bytes from both page 2*n and page 2*n+1, makes a logical and for each byte, and returns the result. As programming a page means "clearing bits", even if a bit was not cleared on one page because the flash is worn out, the other page has the bit cleared, and the result of the "AND" gives a correct result. When writing to page 2*n, the chip writes data to both page 2*n and page 2*n+1. Signed-off-by:
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Robert Jarzmik authored
Add functions to powerdown and powerup from suspend, in order to save power. Signed-off-by:
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Robert Jarzmik authored
Credit for discovering the BCH algorith parameters, and bit reversing algorithm is to be give to Mike Dunn and Ivan Djelic. The BCH correction code relied upon the BCH library, where all data and ECC is bit-reversed. The BCH library works correctly when each input byte is bit-reversed, and accordingly ECC output is also bit-reversed. Signed-off-by:
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Robert Jarzmik authored
Map the developped write and erase functions into the mtd structure. Signed-off-by:
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Robert Jarzmik authored
Add erase capability to the docg3 driver. The erase block is made of 2 physical blocks, as both share all 64 pages. That makes an erase block of at least 64 kBytes. Signed-off-by:
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Robert Jarzmik authored
Add write capability to the docg3 driver. The writes are possible on a single page (512 bytes + 16 bytes), even if that page is split on 2 physical pages on 2 blocks (each on one plane). Signed-off-by:
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Robert Jarzmik authored
Add OOB buffer area to store the OOB data until the actual page is written, so that it can be completed by hardware ECC generator. Signed-off-by:
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Robert Jarzmik authored
Add the required registers and commands to erase and write flash pages / blocks. Signed-off-by:
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Robert Jarzmik authored
Add OOB layout description for docg3, so that userspace can use this information to setup the data for write_oob(). Signed-off-by:
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Robert Jarzmik authored
Add support for multiple floors, ie. cascaded docg3 chips. There might be 4 docg3 chips cascaded, sharing the same address space, and providing up to 4 times the storage capacity of a unique chip. Each floor will be seen as an independant mtd device. Signed-off-by:
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Robert Jarzmik authored
Fix the docg3 reads to be able to cope with all possible data buffer / oob buffer / file mode combinations from docg3_read_oob(). This especially ensures that raw reads do not use ECC corrections, and AUTOOOB and PLACEOOB do use ECC correction. The approach is to empty docg3_read() and make it a wrapper to docg3_read_oob(). As docg3_read_oob() handles all the funny cases (no data buffer but oob buffer, data buffer but no oob buffer, ...), docg3_read() is just a special use of docg3_read_oob(). Signed-off-by:
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Robert Jarzmik authored
BCH registers are contiguous, not on every byte. Fix the register definitions. Signed-off-by:
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Robert Jarzmik authored
The protection areas boundaries were on 16bit registers, not 8bit. This is consistent with block numbers, which can extend up to 4096 on bigger chips (and is 2048 on the docg3). Signed-off-by:
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Robert Jarzmik authored
Writeb was incorrectly traced as a 16 bits write, instead of a 8 bits write. Fix it by tracing the correct width. Signed-off-by:
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Robert Jarzmik authored
Change the NOP debug log verbosity to very verbose to unburden log analysis. Signed-off-by:
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Shubhrajyoti D authored
Making MTD_NAND_OMAP2 depend on ARCH_OMAP2PLUS instead of oring with ARCH2/3/4. Reported-by:
Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by:
Shubhrajyoti D <shubhrajyoti@ti.com> Signed-off-by:
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Aaron Sierra authored
This patch allows each CFI device map to use its own endianness. The globally defined CFI endianness (CONFIG_MTD_CFI_NOSWAP, CONFIG_MTD_CFI_BE_BYTE_SWAP or CONFIG_MTD_CFI_LE_BYTE_SWAP) becomes the default value which can be overridden by a driver for a particular device. Signed-off-by:
Aaron Sierra <asierra@xes-inc.com> Signed-off-by:
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Brian Norris authored
Some error paths in mtd_blkdevs were fixed in the following commit: commit 94735ec4 mtd: mtd_blkdevs: fix error path in blktrans_open But on these error paths, the block device's `dev->open' count is already incremented before we check for errors. This meant that, while the error path was handled correctly on the first time through blktrans_open(), the device is erroneously considered already open on the second time through. This problem can be seen, for instance, when a UBI volume is simultaneously mounted as a UBIFS partition and read through its corresponding gluebi mtdblockX device. This results in blktrans_open() passing its error checks (with `dev->open > 0') without actually having a handle on the device. Here's a summarized log of the actions and results with nandsim: # modprobe nandsim # modprobe mtdblock # modprobe gluebi # modprobe ubifs # ubiattach /dev/ubi_ctrl -m 0 ... # ubimkvol /dev/ubi0 -N test -s 16MiB ... # mount -t ubifs ubi0:test /mnt # ls /dev/mtdblock* /dev/mtdblock0 /dev/mtdblock1 # cat /dev/mtdblock1 > /dev/null cat: can't open '/dev/mtdblock4': Device or resource busy # cat /dev/mtdblock1 > /dev/null CPU 0 Unable to handle kernel paging request at virtual address fffffff0, epc == 8031536c, ra == 8031f280 Oops[#1]: ... Call Trace: [<8031536c>] ubi_leb_read+0x14/0x164 [<8031f280>] gluebi_read+0xf0/0x148 [<802edba8>] mtdblock_readsect+0x64/0x198 [<802ecfe4>] mtd_blktrans_thread+0x330/0x3f4 [<8005be98>] kthread+0x88/0x90 [<8000bc04>] kernel_thread_helper+0x10/0x18 Cc: stable@kernel.org [3.0+] Signed-off-by:Brian Norris <computersforpeace@gmail.com> Signed-off-by:
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Brian Norris authored
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