diff options
| author | Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> | 2008-05-15 03:19:49 +0000 |
|---|---|---|
| committer | Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> | 2008-05-15 03:19:49 +0000 |
| commit | a4868c44b56424d3f0c28ad1a6aa95bdd7eae04b (patch) | |
| tree | 2c2ae700648ed4075c83e65f89fa6d62ee161f8b /util/flashrom/spi.h | |
| parent | c7d29013db37b25e842d5208d0c5664282715055 (diff) | |
Add support for the JEDEC RES (Read Electronic Signature and Resume from
Powerdown) SPI command to flashrom to identify older SPI chips which
can't handle JEDEC RDID. Since RES gives a one-byte identifier which is
shared among many different vendors and even different sizes, we want to
match RES as a last resort if RDID returns 0xff 0xff 0xff.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Peter Stuge <peter@stuge.se>
This is a heavily reworked version of a patch by Fredrik Tolf, which was
Signed-off-by: Fredrik Tolf <fredrik@dolda2000.com>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3320 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'util/flashrom/spi.h')
| -rw-r--r-- | util/flashrom/spi.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/util/flashrom/spi.h b/util/flashrom/spi.h index 15bac4ec52..f5c877cdcb 100644 --- a/util/flashrom/spi.h +++ b/util/flashrom/spi.h @@ -29,6 +29,11 @@ #define JEDEC_RDID_OUTSIZE 0x01 #define JEDEC_RDID_INSIZE 0x03 +/* Read Electronic Signature */ +#define JEDEC_RES 0xab +#define JEDEC_RES_OUTSIZE 0x04 +#define JEDEC_RES_INSIZE 0x01 + /* Write Enable */ #define JEDEC_WREN 0x06 #define JEDEC_WREN_OUTSIZE 0x01 |