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authorBartlomiej Sieka <tur@semihalf.com>2007-12-11 13:59:57 +0100
committerStefan Roese <sr@denx.de>2007-12-13 12:00:37 +0100
commit42026c9cb3a76849b41e6e24abfb7b56807a5c1a (patch)
treeafa2597b10e02c1c3f8464b90cc3805d552f11ff /drivers
parent9692c2734a47f23b44a0f68042a3e2ca8d1bfb39 (diff)
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CFI: synchronize command offsets with Linux CFI driver
Fixes non-working CFI Flash on the Inka4x0 board. Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mtd/cfi_flash.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index 66754cd..c3293d0 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -1231,9 +1231,26 @@ static int flash_detect_cfi (flash_info_t * info)
debug ("port %d bits chip %d bits\n",
info->portwidth << CFI_FLASH_SHIFT_WIDTH,
info->chipwidth << CFI_FLASH_SHIFT_WIDTH);
- /* this probably only works if info->interface == FLASH_CFI_X8X16 */
- info->addr_unlock1 = (info->portwidth == FLASH_CFI_8BIT) ? 0xAAA : 0x555;
- info->addr_unlock2 = (info->portwidth == FLASH_CFI_8BIT) ? 0x555 : 0x2AA;
+
+ /* calculate command offsets as in the Linux driver */
+ info->addr_unlock1 = 0x555;
+ info->addr_unlock2 = 0x2aa;
+
+ /*
+ * modify the unlock address if we are
+ * in compatibility mode
+ */
+ if ( /* x8/x16 in x8 mode */
+ ((info->chipwidth == FLASH_CFI_BY8) &&
+ (info->interface == FLASH_CFI_X8X16)) ||
+ /* x16/x32 in x16 mode */
+ ((info->chipwidth == FLASH_CFI_BY16) &&
+ (info->interface == FLASH_CFI_X16X32)))
+ {
+ info->addr_unlock1 = 0xaaa;
+ info->addr_unlock2 = 0x555;
+ }
+
info->name = "CFI conformant";
return 1;
}