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authorGuillaume LECERF <glecerf@gmail.com>2010-04-24 17:57:52 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-05-14 01:07:42 +0100
commit8473044d644553ca3c939249490d1c5ef5f6d4e6 (patch)
treefad1fc267cd1309de9231f6988aca24e35773cc0 /drivers/mtd
parent010937ec9a550e2df97f87252a9d12d8a534c6d8 (diff)
mtd: cfi_probe: enter Auto Select Mode after filling cfi->cfiq members
Move the code to enter Auto Select Mode down to be able to use cfi->cfiq members to add support for chips using alternative sequence / unlock addresses. Signed-off-by: Guillaume LECERF <glecerf@gmail.com> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/chips/cfi_probe.c47
1 files changed, 24 insertions, 23 deletions
diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c
index e63e6749429..f657d16cb98 100644
--- a/drivers/mtd/chips/cfi_probe.c
+++ b/drivers/mtd/chips/cfi_probe.c
@@ -181,29 +181,6 @@ static int __xipram cfi_chip_setup(struct map_info *map,
for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++)
((unsigned char *)cfi->cfiq)[i] = cfi_read_query(map,base + (0x10 + i)*ofs_factor);
- /* Note we put the device back into Read Mode BEFORE going into Auto
- * Select Mode, as some devices support nesting of modes, others
- * don't. This way should always work.
- * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and
- * so should be treated as nops or illegal (and so put the device
- * back into Read Mode, which is a nop in this case).
- */
- cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL);
- cfi_send_gen_cmd(0xaa, 0x555, base, map, cfi, cfi->device_type, NULL);
- cfi_send_gen_cmd(0x55, 0x2aa, base, map, cfi, cfi->device_type, NULL);
- cfi_send_gen_cmd(0x90, 0x555, base, map, cfi, cfi->device_type, NULL);
- cfi->mfr = cfi_read_query16(map, base);
- cfi->id = cfi_read_query16(map, base + ofs_factor);
-
- /* Get AMD/Spansion extended JEDEC ID */
- if (cfi->mfr == CFI_MFR_AMD && (cfi->id & 0xff) == 0x7e)
- cfi->id = cfi_read_query(map, base + 0xe * ofs_factor) << 8 |
- cfi_read_query(map, base + 0xf * ofs_factor);
-
- /* Put it back into Read Mode */
- cfi_qry_mode_off(base, map, cfi);
- xip_allowed(base, map);
-
/* Do any necessary byteswapping */
cfi->cfiq->P_ID = le16_to_cpu(cfi->cfiq->P_ID);
@@ -228,6 +205,30 @@ static int __xipram cfi_chip_setup(struct map_info *map,
#endif
}
+ /*
+ * Note we put the device back into Read Mode BEFORE going into Auto
+ * Select Mode, as some devices support nesting of modes, others
+ * don't. This way should always work.
+ * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and
+ * so should be treated as nops or illegal (and so put the device
+ * back into Read Mode, which is a nop in this case).
+ */
+ cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL);
+ cfi_send_gen_cmd(0xaa, 0x555, base, map, cfi, cfi->device_type, NULL);
+ cfi_send_gen_cmd(0x55, 0x2aa, base, map, cfi, cfi->device_type, NULL);
+ cfi_send_gen_cmd(0x90, 0x555, base, map, cfi, cfi->device_type, NULL);
+ cfi->mfr = cfi_read_query16(map, base);
+ cfi->id = cfi_read_query16(map, base + ofs_factor);
+
+ /* Get AMD/Spansion extended JEDEC ID */
+ if (cfi->mfr == CFI_MFR_AMD && (cfi->id & 0xff) == 0x7e)
+ cfi->id = cfi_read_query(map, base + 0xe * ofs_factor) << 8 |
+ cfi_read_query(map, base + 0xf * ofs_factor);
+
+ /* Put it back into Read Mode */
+ cfi_qry_mode_off(base, map, cfi);
+ xip_allowed(base, map);
+
printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n",
map->name, cfi->interleave, cfi->device_type*8, base,
map->bankwidth*8);