diff options
| author | Andreas Bießmann <andreas.devel@googlemail.com> | 2011-07-12 12:38:22 +0200 |
|---|---|---|
| committer | Øyvind Harboe <oyvind.harboe@zylin.com> | 2011-08-09 20:19:37 +0200 |
| commit | 6e5c37be29cdefc0ea2de6d06866811bc7e44cbd (patch) | |
| tree | d414a8c628819fd90bdb8bd15280ae466d84d078 /src/flash/nor | |
| parent | 7d2bf8805df5ec9f108758188e85f2d355f720c4 (diff) | |
flash/nor/cfi: fix TopBottom for atmel chips
There are some older atmel nor chips which have negated logic for
TopBottom detection. This patch adds a special handling for the old
chips. This is the same mechanism as implemented in linux kernel.
Signed-off-by: Andreas Bießmann <andreas.devel@gmail.com>
Diffstat (limited to 'src/flash/nor')
| -rw-r--r-- | src/flash/nor/cfi.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/src/flash/nor/cfi.c b/src/flash/nor/cfi.c index 3f1fbabe..f854dd63 100644 --- a/src/flash/nor/cfi.c +++ b/src/flash/nor/cfi.c @@ -42,6 +42,10 @@ /* defines internal maximum size for code fragment in cfi_intel_write_block() */ #define CFI_MAX_INTEL_CODESIZE 256 +/* some id-types with specific handling */ +#define AT49BV6416 0x00d6 +#define AT49BV6416T 0x00d2 + static struct cfi_unlock_addresses cfi_unlock_addresses[] = { [CFI_UNLOCK_555_2AA] = { .unlock1 = 0x555, .unlock2 = 0x2aa }, @@ -700,10 +704,19 @@ static int cfi_read_atmel_pri_ext(struct flash_bank *bank) if (atmel_pri_ext.features & 0x02) pri_ext->EraseSuspend = 2; - if (atmel_pri_ext.bottom_boot) - pri_ext->TopBottom = 2; - else - pri_ext->TopBottom = 3; + /* some chips got it backwards... */ + if (cfi_info->device_id == AT49BV6416 || + cfi_info->device_id == AT49BV6416T) { + if (atmel_pri_ext.bottom_boot) + pri_ext->TopBottom = 3; + else + pri_ext->TopBottom = 2; + } else { + if (atmel_pri_ext.bottom_boot) + pri_ext->TopBottom = 2; + else + pri_ext->TopBottom = 3; + } pri_ext->_unlock1 = cfi_unlock_addresses[CFI_UNLOCK_555_2AA].unlock1; pri_ext->_unlock2 = cfi_unlock_addresses[CFI_UNLOCK_555_2AA].unlock2; |