- 10 1月, 2012 13 次提交
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
Add functions to powerdown and powerup from suspend, in order to save power. Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
Map the developped write and erase functions into the mtd structure. Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
Add OOB layout description for docg3, so that userspace can use this information to setup the data for write_oob(). Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
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: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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由 Robert Jarzmik 提交于
Change the NOP debug log verbosity to very verbose to unburden log analysis. Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: NIvan Djelic <ivan.djelic@parrot.com> Reviewed-by: NMike Dunn <mikedunn@newsguy.com> Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 14 10月, 2011 1 次提交
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由 Robert Jarzmik 提交于
Add support for DiskOnChip G3 chips. The support is quite limited yet : - no flash writes/erases are implemented - ECC fixes are not implemented - powerdown is not implemented - IPL handling is not yet done On the brighter side, the chip reading does work. Signed-off-by: NRobert Jarzmik <robert.jarzmik@free.fr>
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