diff options
| -rw-r--r-- | drivers/mtd/cfi_flash.c | 67 |
1 files changed, 53 insertions, 14 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index effcce4df8..f370e4fbd3 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -1383,20 +1383,6 @@ static int cmdset_amd_init(flash_info_t *info, struct cfi_qry *qry) cmdset_amd_read_jedec_ids(info); flash_write_cmd(info, 0, info->cfi_offset, FLASH_CMD_CFI); - /* 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, try to guess from device id */ - if ((info->device_id & 0x80) != 0) - cfi_reverse_geometry(qry); - } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) { - /* CFI >= 1.1, deduct from top/bottom flag */ - /* note: ext_addr is valid since cfi_version > 0 */ - cfi_reverse_geometry(qry); - } - } - return 0; } @@ -1568,6 +1554,49 @@ static int flash_detect_cfi (flash_info_t * info, struct cfi_qry *qry) } /* + * Manufacturer-specific quirks. Add workarounds for geometry + * reversal, etc. here. + */ +static void flash_fixup_amd(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, try to guess from device id */ + if ((info->device_id & 0x80) != 0) + cfi_reverse_geometry(qry); + } else if (flash_read_uchar(info, info->ext_addr + 0xf) == 3) { + /* CFI >= 1.1, deduct from top/bottom flag */ + /* note: ext_addr is valid since cfi_version > 0 */ + cfi_reverse_geometry(qry); + } + } +} + +static void flash_fixup_atmel(flash_info_t *info, struct cfi_qry *qry) +{ + int reverse_geometry = 0; + + /* Check the "top boot" bit in the PRI */ + if (info->ext_addr && !(flash_read_uchar(info, info->ext_addr + 6) & 1)) + reverse_geometry = 1; + + /* AT49BV6416(T) list the erase regions in the wrong order. + * However, the device ID is identical with the non-broken + * AT49BV642D since u-boot only reads the low byte (they + * differ in the high byte.) So leave out this fixup for now. + */ +#if 0 + if (info->device_id == 0xd6 || info->device_id == 0xd2) + reverse_geometry = !reverse_geometry; +#endif + + if (reverse_geometry) + cfi_reverse_geometry(qry); +} + +/* * The following code cannot be run from FLASH! * */ @@ -1629,6 +1658,16 @@ ulong flash_get_size (ulong base, int banknum) return 0; } + /* Do manufacturer-specific fixups */ + switch (info->manufacturer_id) { + case 0x0001: + flash_fixup_amd(info, &qry); + break; + case 0x001f: + flash_fixup_atmel(info, &qry); + break; + } + debug ("manufacturer is %d\n", info->vendor); debug ("manufacturer id is 0x%x\n", info->manufacturer_id); debug ("device id is 0x%x\n", info->device_id); |