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CFI: Add geometry reversal for STMicro M29W320ET

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Added flash_fixup_stm to fix geometry reversal on STMicro M29W320ET flash chip.

Modeled after flash_fixup_amd, this patch handles the geometry reversal
or erase sectors that exist for ST Micro (now Numonyx) M29W320ET flash.
Since I cannot test all STM's chips, the detection is implemented as
narrow as possible for now.

Signed-off-by: Richard Retanubun <RichardRetanubun@RuggedCom.com>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Richard Retanubun 2009-01-14 08:44:26 -05:00 committed by Stefan Roese
parent 0f8e851e89
commit e8eac43718
1 changed files with 17 additions and 0 deletions
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17
drivers/mtd/cfi_flash.c
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@ -1808,6 +1808,20 @@ static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry)
cfi_reverse_geometry(qry); cfi_reverse_geometry(qry);
} }
static void flash_fixup_stm(flash_info_t *info, struct cfi_qry *qry)
{
/* check if flash geometry needs reversal */
if (qry->num_erase_regions > 1) {
/* reverse geometry if top boot part */
if (info->cfi_version < 0x3131) {
/* CFI < 1.1, guess by device id (only M29W320ET now) */
if (info->device_id == 0x2256) {
cfi_reverse_geometry(qry);
}
}
}
}
/* /*
* The following code cannot be run from FLASH! * The following code cannot be run from FLASH!
* *
@ -1881,6 +1895,9 @@ ulong flash_get_size (ulong base, int banknum)
case 0x001f: case 0x001f:
flash_fixup_atmel(info, &qry); flash_fixup_atmel(info, &qry);
break; break;
case 0x0020:
flash_fixup_stm(info, &qry);
break;
} }
debug ("manufacturer is %d\n", info->vendor); debug ("manufacturer is %d\n", info->vendor);