target/linux/ramips/patches-4.4/0901-spansion_nand_id_fix.patch

   1 From 8b61a1a33e41456ebeafa0ebe7ec0fccf859861e Mon Sep 17 00:00:00 2001
   2 From: Nikolay Martynov <mar.kolya@gmail.com>
   3 Date: Wed, 25 Nov 2015 20:43:46 -0500
   4 Subject: [PATCH] mtd: nand: Fix Spansion sparearea size detection
   5
   6 According to datasheet S34ML02G2 and S34ML04G2 have
   7 larger sparea area size than was detected.
   8
   9 Signed-off-by: Nikolay Martynov <mar.kolya@gmail.com>
  10 ---
  11  drivers/mtd/nand/nand_base.c | 9 +++++++++
  12  1 file changed, 9 insertions(+)
  13
  14 --- a/drivers/mtd/nand/nand_base.c
  15 +++ b/drivers/mtd/nand/nand_base.c
  16 @@ -3574,6 +3574,7 @@ static void nand_decode_ext_id(struct mt
  17         /*
  18          * Field definitions are in the following datasheets:
  19          * Old style (4,5 byte ID): Samsung K9GAG08U0M (p.32)
  20 +        *                          Spansion S34ML02G2 (p.33)
  21          * New Samsung (6 byte ID): Samsung K9GAG08U0F (p.44)
  22          * Hynix MLC   (6 byte ID): Hynix H27UBG8T2B (p.22)
  23          *
  24 @@ -3671,6 +3672,19 @@ static void nand_decode_ext_id(struct mt
  25                 *busw = (extid & 0x01) ? NAND_BUSWIDTH_16 : 0;
  26
  27                 /*
  28 +                * Spansion S34ML0[24]G2 have oobsize twice as large
  29 +                * as S34ML01G2 encoded in the same bit. We
  30 +                * differinciate them by their ID length
  31 +                */
  32 +               if (id_data[0] == NAND_MFR_AMD
  33 +                               && (id_data[1] == 0xda
  34 +                                || id_data[1] == 0xdc
  35 +                                || id_data[1] == 0xca
  36 +                                || id_data[1] == 0xcc)) {
  37 +                       mtd->oobsize *= 2;
  38 +               }
  39 +
  40 +               /*
  41                  * Toshiba 24nm raw SLC (i.e., not BENAND) have 32B OOB per
  42                  * 512B page. For Toshiba SLC, we decode the 5th/6th byte as
  43                  * follows: