diff options
| author | Guillaume LECERF <foxcore@gmail.com> | 2009-11-23 04:10:49 +0300 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-11-30 14:39:21 +0300 |
| commit | 4a58948669702639db7acecfa2105c3172d85c93 (patch) | |
| tree | 7fcd1689d93afd6b0bb37e65ba89e19691b46c3b /drivers/mtd | |
| parent | db5432db81b1775f145945b21428490583ab3e2b (diff) | |
| download | linux-4a58948669702639db7acecfa2105c3172d85c93.tar.xz | |
mtd: add support for switching old SST chips into QRY mode
SST 39VF160x/39VF320x and some old SST chips need a special command
sequence to enter CFI QueRY mode [1].
This patch adds the relevant sequence to cfi_qry_mode_on().
Tested with 39VF3201.
Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
| -rwxr-xr-x | drivers/mtd/chips/cfi_util.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mtd/chips/cfi_util.c b/drivers/mtd/chips/cfi_util.c index c5a84fda5410..ca584d0380b4 100755 --- a/drivers/mtd/chips/cfi_util.c +++ b/drivers/mtd/chips/cfi_util.c @@ -71,6 +71,13 @@ int __xipram cfi_qry_mode_on(uint32_t base, struct map_info *map, cfi_send_gen_cmd(0x98, 0x555, base, map, cfi, cfi->device_type, NULL); if (cfi_qry_present(map, base, cfi)) return 1; + /* some old SST chips, e.g. 39VF160x/39VF320x */ + cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL); + cfi_send_gen_cmd(0xAA, 0x5555, base, map, cfi, cfi->device_type, NULL); + cfi_send_gen_cmd(0x55, 0x2AAA, base, map, cfi, cfi->device_type, NULL); + cfi_send_gen_cmd(0x98, 0x5555, base, map, cfi, cfi->device_type, NULL); + if (cfi_qry_present(map, base, cfi)) + return 1; /* QRY not found */ return 0; } |