Add entry for 512Kx16 AMD flash to jedec_table.
Read out 16bit device id if chipwidth is 16bit.
Fixed coding style after Stefans feedback
Signed-off-by: Tor Krill <[EMAIL PROTECTED]>
---
drivers/mtd/cfi_flash.c | 44 +++++++++++++++++++++++++++++++++++---------
drivers/mtd/jedec_flash.c | 19 +++++++++++++++++++
2 files changed, 54 insertions(+), 9 deletions(-)
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c
index f04c72d..3f8911e 100644
--- a/drivers/mtd/cfi_flash.c
+++ b/drivers/mtd/cfi_flash.c
@@ -365,6 +365,20 @@ static inline uchar flash_read_uchar (flash_info_t * info,
uint offset)
}
/*-----------------------------------------------------------------------
+ * read a word at a port width address, assume 16bit bus
+ */
+static inline ushort flash_read_word (flash_info_t * info, uint offset)
+{
+ ushort *addr, retval;
+
+ addr = flash_map (info, 0, offset);
+ retval = flash_read16 (addr);
+ flash_unmap (info, 0, offset, addr);
+ return retval;
+}
+
+
+/*-----------------------------------------------------------------------
* read a long word by picking the least significant byte of each maximum
* port size word. Swap for ppc format.
*/
@@ -1449,17 +1463,29 @@ static void cmdset_amd_read_jedec_ids(flash_info_t
*info)
flash_unlock_seq(info, 0);
flash_write_cmd(info, 0, info->addr_unlock1, FLASH_CMD_READ_ID);
udelay(1000); /* some flash are slow to respond */
+
info->manufacturer_id = flash_read_uchar (info,
FLASH_OFFSET_MANUFACTURER_ID);
- info->device_id = flash_read_uchar (info,
- FLASH_OFFSET_DEVICE_ID);
- if (info->device_id == 0x7E) {
- /* AMD 3-byte (expanded) device ids */
- info->device_id2 = flash_read_uchar (info,
- FLASH_OFFSET_DEVICE_ID2);
- info->device_id2 <<= 8;
- info->device_id2 |= flash_read_uchar (info,
- FLASH_OFFSET_DEVICE_ID3);
+
+ switch (info->chipwidth){
+ case FLASH_CFI_8BIT:
+ info->device_id = flash_read_uchar (info,
+ FLASH_OFFSET_DEVICE_ID);
+ if (info->device_id == 0x7E) {
+ /* AMD 3-byte (expanded) device ids */
+ info->device_id2 = flash_read_uchar (info,
+ FLASH_OFFSET_DEVICE_ID2);
+ info->device_id2 <<= 8;
+ info->device_id2 |= flash_read_uchar (info,
+ FLASH_OFFSET_DEVICE_ID3);
+ }
+ break;
+ case FLASH_CFI_16BIT:
+ info->device_id = flash_read_word (info,
+ FLASH_OFFSET_DEVICE_ID);
+ break;
+ default:
+ break;
}
flash_write_cmd(info, 0, 0, AMD_CMD_RESET);
}
diff --git a/drivers/mtd/jedec_flash.c b/drivers/mtd/jedec_flash.c
index 41aad3b..b958d17 100644
--- a/drivers/mtd/jedec_flash.c
+++ b/drivers/mtd/jedec_flash.c
@@ -216,6 +216,25 @@ static const struct amd_flash_info jedec_table[] = {
}
},
#endif
+#ifdef CFG_FLASH_LEGACY_512Kx16
+ {
+ .mfr_id = MANUFACTURER_AMD,
+ .dev_id = AM29LV400BB,
+ .name = "AMD AM29LV400BB",
+ .uaddr = {
+ [1] = MTD_UADDR_0x0555_0x02AA /* x16 */
+ },
+ .DevSize = SIZE_512KiB,
+ .CmdSet = CFI_CMDSET_AMD_LEGACY,
+ .NumEraseRegions= 4,
+ .regions = {
+ ERASEINFO(0x04000,1),
+ ERASEINFO(0x02000,2),
+ ERASEINFO(0x08000,1),
+ ERASEINFO(0x10000,7),
+ }
+ },
+#endif
};
static inline void fill_info(flash_info_t *info, const struct amd_flash_info
*jedec_entry, ulong base)
--
1.5.4.4
-------------------------------------------------------------------------
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