git.openwrt.org Git - openwrt/staging/dangole.git/blob

   1
   2 IMPORTANT NOTE
   3 ==============
   4
   5 The content of this patch has been adapted for Linux 4.19
   6
   7 Changes were made in Linux 5.x to add the bad-block limit
   8 to the metadata available to the driver, adding a parameter
   9
  10 NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
  11                                      ^- New bad-block limit
  12
  13 This patch omits that parameter from the upstream patch
  14 for compatibility with the Linux 4.19 driver.
  15
  16 =====
  17
  18 From 049df13c4e63884fe6634db5568e08f65922256e Mon Sep 17 00:00:00 2001
  19 From: Jeff Kletsky <git-commits@allycomm.com>
  20 Date: Wed, 22 May 2019 15:05:55 -0700
  21 Subject: [PATCH 3/3] mtd: spinand: Add support for GigaDevice GD5F1GQ4UFxxG
  22
  23 The GigaDevice GD5F1GQ4UFxxG SPI NAND is in current production devices
  24 and, while it has the same logical layout as the E-series devices,
  25 it differs in the SPI interfacing in significant ways.
  26
  27 This support is contingent on previous commits to:
  28
  29   * Add support for two-byte device IDs
  30   * Define macros for page-read ops with three-byte addresses
  31
  32 http://www.gigadevice.com/datasheet/gd5f1gq4xfxxg/
  33
  34 Signed-off-by: Jeff Kletsky <git-commits@allycomm.com>
  35 Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
  36 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  37 ---
  38  drivers/mtd/nand/spi/gigadevice.c | 79 +++++++++++++++++++++++++------
  39  1 file changed, 64 insertions(+), 15 deletions(-)
  40
  41 --- a/drivers/mtd/nand/spi/gigadevice.c
  42 +++ b/drivers/mtd/nand/spi/gigadevice.c
  43 @@ -9,11 +9,17 @@
  44  #include <linux/mtd/spinand.h>
  45
  46  #define SPINAND_MFR_GIGADEVICE                 0xC8
  47 +
  48  #define GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS     (1 << 4)
  49  #define GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS       (3 << 4)
  50
  51  #define GD5FXGQ4UEXXG_REG_STATUS2              0xf0
  52
  53 +#define GD5FXGQ4UXFXXG_STATUS_ECC_MASK         (7 << 4)
  54 +#define GD5FXGQ4UXFXXG_STATUS_ECC_NO_BITFLIPS  (0 << 4)
  55 +#define GD5FXGQ4UXFXXG_STATUS_ECC_1_3_BITFLIPS (1 << 4)
  56 +#define GD5FXGQ4UXFXXG_STATUS_ECC_UNCOR_ERROR  (7 << 4)
  57 +
  58  static SPINAND_OP_VARIANTS(read_cache_variants,
  59                 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
  60                 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
  61 @@ -22,6 +28,14 @@ static SPINAND_OP_VARIANTS(read_cache_va
  62                 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  63                 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  64
  65 +static SPINAND_OP_VARIANTS(read_cache_variants_f,
  66 +               SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
  67 +               SPINAND_PAGE_READ_FROM_CACHE_X4_OP_3A(0, 1, NULL, 0),
  68 +               SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
  69 +               SPINAND_PAGE_READ_FROM_CACHE_X2_OP_3A(0, 1, NULL, 0),
  70 +               SPINAND_PAGE_READ_FROM_CACHE_OP_3A(true, 0, 1, NULL, 0),
  71 +               SPINAND_PAGE_READ_FROM_CACHE_OP_3A(false, 0, 0, NULL, 0));
  72 +
  73  static SPINAND_OP_VARIANTS(write_cache_variants,
  74                 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  75                 SPINAND_PROG_LOAD(true, 0, NULL, 0));
  76 @@ -59,6 +73,11 @@ static int gd5fxgq4xa_ooblayout_free(str
  77         return 0;
  78  }
  79
  80 +static const struct mtd_ooblayout_ops gd5fxgq4xa_ooblayout = {
  81 +       .ecc = gd5fxgq4xa_ooblayout_ecc,
  82 +       .free = gd5fxgq4xa_ooblayout_free,
  83 +};
  84 +
  85  static int gd5fxgq4xa_ecc_get_status(struct spinand_device *spinand,
  86                                          u8 status)
  87  {
  88 @@ -83,7 +102,7 @@ static int gd5fxgq4xa_ecc_get_status(str
  89         return -EINVAL;
  90  }
  91
  92 -static int gd5fxgq4uexxg_ooblayout_ecc(struct mtd_info *mtd, int section,
  93 +static int gd5fxgq4_variant2_ooblayout_ecc(struct mtd_info *mtd, int section,
  94                                        struct mtd_oob_region *region)
  95  {
  96         if (section)
  97 @@ -95,7 +114,7 @@ static int gd5fxgq4uexxg_ooblayout_ecc(s
  98         return 0;
  99  }
 100
 101 -static int gd5fxgq4uexxg_ooblayout_free(struct mtd_info *mtd, int section,
 102 +static int gd5fxgq4_variant2_ooblayout_free(struct mtd_info *mtd, int section,
 103                                         struct mtd_oob_region *region)
 104  {
 105         if (section)
 106 @@ -108,6 +127,11 @@ static int gd5fxgq4uexxg_ooblayout_free(
 107         return 0;
 108  }
 109
 110 +static const struct mtd_ooblayout_ops gd5fxgq4_variant2_ooblayout = {
 111 +       .ecc = gd5fxgq4_variant2_ooblayout_ecc,
 112 +       .free = gd5fxgq4_variant2_ooblayout_free,
 113 +};
 114 +
 115  static int gd5fxgq4uexxg_ecc_get_status(struct spinand_device *spinand,
 116                                         u8 status)
 117  {
 118 @@ -150,15 +174,25 @@ static int gd5fxgq4uexxg_ecc_get_status(
 119         return -EINVAL;
 120  }
 121
 122 -static const struct mtd_ooblayout_ops gd5fxgq4xa_ooblayout = {
 123 -       .ecc = gd5fxgq4xa_ooblayout_ecc,
 124 -       .free = gd5fxgq4xa_ooblayout_free,
 125 -};
 126 +static int gd5fxgq4ufxxg_ecc_get_status(struct spinand_device *spinand,
 127 +                                       u8 status)
 128 +{
 129 +       switch (status & GD5FXGQ4UXFXXG_STATUS_ECC_MASK) {
 130 +       case GD5FXGQ4UXFXXG_STATUS_ECC_NO_BITFLIPS:
 131 +               return 0;
 132
 133 -static const struct mtd_ooblayout_ops gd5fxgq4uexxg_ooblayout = {
 134 -       .ecc = gd5fxgq4uexxg_ooblayout_ecc,
 135 -       .free = gd5fxgq4uexxg_ooblayout_free,
 136 -};
 137 +       case GD5FXGQ4UXFXXG_STATUS_ECC_1_3_BITFLIPS:
 138 +               return 3;
 139 +
 140 +       case GD5FXGQ4UXFXXG_STATUS_ECC_UNCOR_ERROR:
 141 +               return -EBADMSG;
 142 +
 143 +       default: /* (2 << 4) through (6 << 4) are 4-8 corrected errors */
 144 +               return ((status & GD5FXGQ4UXFXXG_STATUS_ECC_MASK) >> 4) + 2;
 145 +       }
 146 +
 147 +       return -EINVAL;
 148 +}
 149
 150  static const struct spinand_info gigadevice_spinand_table[] = {
 151         SPINAND_INFO("GD5F1GQ4xA", 0xF1,
 152 @@ -195,25 +229,40 @@ static const struct spinand_info gigadev
 153                                               &write_cache_variants,
 154                                               &update_cache_variants),
 155                      0,
 156 -                    SPINAND_ECCINFO(&gd5fxgq4uexxg_ooblayout,
 157 +                    SPINAND_ECCINFO(&gd5fxgq4_variant2_ooblayout,
 158                                      gd5fxgq4uexxg_ecc_get_status)),
 159 +       SPINAND_INFO("GD5F1GQ4UFxxG", 0xb148,
 160 +                    NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
 161 +                    NAND_ECCREQ(8, 512),
 162 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants_f,
 163 +                                             &write_cache_variants,
 164 +                                             &update_cache_variants),
 165 +                    0,
 166 +                    SPINAND_ECCINFO(&gd5fxgq4_variant2_ooblayout,
 167 +                                    gd5fxgq4ufxxg_ecc_get_status)),
 168  };
 169
 170  static int gigadevice_spinand_detect(struct spinand_device *spinand)
 171  {
 172         u8 *id = spinand->id.data;
 173 +       u16 did;
 174         int ret;
 175
 176         /*
 177 -        * For GD NANDs, There is an address byte needed to shift in before IDs
 178 -        * are read out, so the first byte in raw_id is dummy.
 179 +        * Earlier GDF5-series devices (A,E) return [0][MID][DID]
 180 +        * Later (F) devices return [MID][DID1][DID2]
 181          */
 182 -       if (id[1] != SPINAND_MFR_GIGADEVICE)
 183 +
 184 +       if (id[0] == SPINAND_MFR_GIGADEVICE)
 185 +               did = (id[1] << 8) + id[2];
 186 +       else if (id[0] == 0 && id[1] == SPINAND_MFR_GIGADEVICE)
 187 +               did = id[2];
 188 +       else
 189                 return 0;
 190
 191         ret = spinand_match_and_init(spinand, gigadevice_spinand_table,
 192                                      ARRAY_SIZE(gigadevice_spinand_table),
 193 -                                    id[2]);
 194 +                                    did);
 195         if (ret)
 196                 return ret;
 197