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path: root/drivers/mtd/cfi_flash.c
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Diffstat (limited to 'drivers/mtd/cfi_flash.c')
-rw-r--r--drivers/mtd/cfi_flash.c67
1 files changed, 53 insertions, 14 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index effcce4..f370e4f 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);