| author | Angelo Dureghello <sysamfw@gmail.com> | |
| Sat, 1 Dec 2012 00:14:18 +0000 (01:14 +0100) | ||
| committer | Stefan Roese <sr@denx.de> | |
| Thu, 10 Jan 2013 13:39:13 +0000 (14:39 +0100) | ||
| commit | 07b2c5c0e5abb8b6b996068471024410a7ef4bd4 | |
| tree | 342e5c444db790da94d826f797cee723d9cfef21 | tree | snapshot (tar.xz tar.gz zip) |
| parent | 642ef40bdc95bef829ae3aadc217f829c4c298c4 | commit | diff |
mtd/cfi: add support for SST 4KB sector granularity
Add support for SST 4KB sector granularity.
Many recent SST flashes, i.e. SST39VF3201B and similar of this family
are declared CFI-conformant from SST. They support CFI query, but implement
2 different sector sizes in the same memory: a 64KB sector (they call it
"block", std AMD erase cmd=0x30), and a 4KB sector (they call it "sector",
erase cmd=0x50). Also, CFI query on these chips, reading from address 0x2dh
of cfi query struct, detects a number of secotrs for the 4KB granularity
(flinfo shows it).
For all other aspects, they are CFI compliant, so, as Linux do, i think
it's a good idea to handle these chips in the CFI driver, with a fixup
to allow 4KB granularity, as should be expected, instead of 64KB.
Signed-off-by: Angelo Dureghello <sysamfw@gmail.com>
Signed-off-by: Stefan Rose <sr@denx.de>
Add support for SST 4KB sector granularity.
Many recent SST flashes, i.e. SST39VF3201B and similar of this family
are declared CFI-conformant from SST. They support CFI query, but implement
2 different sector sizes in the same memory: a 64KB sector (they call it
"block", std AMD erase cmd=0x30), and a 4KB sector (they call it "sector",
erase cmd=0x50). Also, CFI query on these chips, reading from address 0x2dh
of cfi query struct, detects a number of secotrs for the 4KB granularity
(flinfo shows it).
For all other aspects, they are CFI compliant, so, as Linux do, i think
it's a good idea to handle these chips in the CFI driver, with a fixup
to allow 4KB granularity, as should be expected, instead of 64KB.
Signed-off-by: Angelo Dureghello <sysamfw@gmail.com>
Signed-off-by: Stefan Rose <sr@denx.de>
| drivers/mtd/cfi_flash.c | diff | blob | history | |
| include/flash.h | diff | blob | history |