mtd: CFI 1.0 and CFI 1.1

This patch allows otpinfo for CFI >= 1.0 and burst read for CFI >= 1.1.

references:
1.0:	http://www.datasheetcatalog.org/datasheets2/81/816884_1.pdf

1.1:	http://milkymist.org/doc/MT28F640J3.pdf
	http://www.delorie.com/agenda/specs/29066709.pdf

Signed-off-by: Daniel Ribeiro <drwyrm@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index e772803b4959..8664feebc93b 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -329,6 +329,7 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 {
         struct cfi_private *cfi = map->fldrv_priv;
         struct cfi_pri_intelext *extp;
+        unsigned int extra_size = 0;
         unsigned int extp_size = sizeof(*extp);
 
  again:
@@ -352,19 +353,24 @@ read_pri_intelext(struct map_info *map, __u16 adr)
         extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask);
         extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr);
 
-        if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') {
-                unsigned int extra_size = 0;
-                int nb_parts, i;
+        if (extp->MinorVersion >= '0') {
+                extra_size = 0;
 
                 /* Protection Register info */
                 extra_size += (extp->NumProtectionFields - 1) *
                               sizeof(struct cfi_intelext_otpinfo);
+        }
 
+        if (extp->MinorVersion >= '1') {
                 /* Burst Read info */
                 extra_size += 2;
                 if (extp_size < sizeof(*extp) + extra_size)
                         goto need_more;
-                extra_size += extp->extra[extra_size-1];
+                extra_size += extp->extra[extra_size - 1];
+        }
+
+        if (extp->MinorVersion >= '3') {
+                int nb_parts, i;
 
                 /* Number of hardware-partitions */
                 extra_size += 1;