mtd: add fixup for S29NS512P NOR flash.

Spansion S29NS512P flash uses a 16bit transfer to report number
of sectors instead of two 8bit accesses as CFI specifies.

Artem: remove warning message which said that we are applying the
fixup - no need to scary the user unnecessarily.

Signed-off-by: Javier Martin <javier.martin@vista-silicon.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index d02592e6a0f02a89195ef1aea302445d98585b0e..49b8b035e8e1ad12a3452ad6df28bb5f45d5e547 100644 (file)
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -332,6 +332,19 @@ static void fixup_s29gl032n_sectors(struct mtd_info *mtd)
        }
 }
 
+static void fixup_s29ns512p_sectors(struct mtd_info *mtd)
+{
+       struct map_info *map = mtd->priv;
+       struct cfi_private *cfi = map->fldrv_priv;
+
+       /*
+        *  S29NS512P flash uses more than 8bits to report number of sectors,
+        * which is not permitted by CFI.
+        */
+       cfi->cfiq->EraseRegionInfo[0] = 0x020001ff;
+       pr_warning("%s: Bad S29NS512P CFI data, adjust to 512 sectors\n", mtd->name);
+}
+
 /* Used to fix CFI-Tables of chips without Extended Query Tables */
 static struct cfi_fixup cfi_nopri_fixup_table[] = {
        { CFI_MFR_SST, 0x234a, fixup_sst39vf }, /* SST39VF1602 */
@@ -362,6 +375,7 @@ static struct cfi_fixup cfi_fixup_table[] = {
        { CFI_MFR_AMD, 0x1301, fixup_s29gl064n_sectors },
        { CFI_MFR_AMD, 0x1a00, fixup_s29gl032n_sectors },
        { CFI_MFR_AMD, 0x1a01, fixup_s29gl032n_sectors },
+       { CFI_MFR_AMD, 0x3f00, fixup_s29ns512p_sectors },
        { CFI_MFR_SST, 0x536a, fixup_sst38vf640x_sectorsize }, /* SST38VF6402 */
        { CFI_MFR_SST, 0x536b, fixup_sst38vf640x_sectorsize }, /* SST38VF6401 */
        { CFI_MFR_SST, 0x536c, fixup_sst38vf640x_sectorsize }, /* SST38VF6404 */