From 07b2c5c0e5abb8b6b996068471024410a7ef4bd4 Mon Sep 17 00:00:00 2001 From: Angelo Dureghello Date: Sat, 1 Dec 2012 01:14:18 +0100 Subject: 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 Signed-off-by: Stefan Rose --- include/flash.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/flash.h') diff --git a/include/flash.h b/include/flash.h index 7db599e783..c7acc977ee 100644 --- a/include/flash.h +++ b/include/flash.h @@ -44,6 +44,7 @@ typedef struct { ulong buffer_write_tout; /* maximum buffer write timeout */ ushort vendor; /* the primary vendor id */ ushort cmd_reset; /* vendor specific reset command */ + uchar cmd_erase_sector; /* vendor specific erase sect. command */ ushort interface; /* used for x8/x16 adjustments */ ushort legacy_unlock; /* support Intel legacy (un)locking */ ushort manufacturer_id; /* manufacturer id */ -- cgit v1.2.3