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CFI: synchronize command offsets with Linux CFI driver

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Fixes non-working CFI Flash on the Inka4x0 board.

Signed-off-by: Bartlomiej Sieka <tur@semihalf.com>
This commit is contained in:
Bartlomiej Sieka 2007-12-11 13:59:57 +01:00 committed by Stefan Roese
parent 9692c2734a
commit 42026c9cb3
2 changed files with 21 additions and 3 deletions
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23
drivers/mtd/cfi_flash.c
View File

@ -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;
}

1
include/flash.h
View File

@ -80,6 +80,7 @@ typedef struct {
#define FLASH_CFI_X8 0x00
#define FLASH_CFI_X16 0x01
#define FLASH_CFI_X8X16 0x02
#define FLASH_CFI_X16X32 0x05
/* convert between bit value and numeric value */
#define CFI_FLASH_SHIFT_WIDTH 3