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Add support for two-byte RES probes

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Some chips implement the RES (0xab) opcode, but they use a non-standard
two byte response instead of the usual one byte response. A two-byte
response has the accuracy of REMS and RDID, so don't check for REMS/RDID
availability before running a two-byte RES.

Corresponding to flashrom svn r1017.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
This commit is contained in:
Carl-Daniel Hailfinger
2010-05-28 17:07:57 +00:00
parent 80f3d05e73
commit dc1cda15d4
4 changed files with 43 additions and 14 deletions
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2
spi.h
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@ -27,6 +27,7 @@
/* Read Electronic ID */
#define JEDEC_RDID 0x9f
#define JEDEC_RDID_OUTSIZE 0x01
/* INSIZE may be 0x04 for some chips*/
#define JEDEC_RDID_INSIZE 0x03
/* AT25F512A has bit 3 as don't care bit in commands */
@ -42,6 +43,7 @@
/* Read Electronic Signature */
#define JEDEC_RES 0xab
#define JEDEC_RES_OUTSIZE 0x04
/* INSIZE may be 0x02 for some chips*/
#define JEDEC_RES_INSIZE 0x01
/* Write Enable */