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>

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index e772803..8664fee 100644 (file)
--- 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;