drivers/mtd/nand/spi/gigadevice.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Author:
   4  *      Chuanhong Guo <gch981213@gmail.com>
   5  */
   6
   7 #include <linux/device.h>
   8 #include <linux/kernel.h>
   9 #include <linux/mtd/spinand.h>
  10
  11 #define SPINAND_MFR_GIGADEVICE                  0xC8
  12 #define GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS      (1 << 4)
  13 #define GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS        (3 << 4)
  14
  15 #define GD5FXGQ4UEXXG_REG_STATUS2               0xf0
  16
  17 static SPINAND_OP_VARIANTS(read_cache_variants,
  18                 SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
  19                 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
  20                 SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
  21                 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
  22                 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  23                 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  24
  25 static SPINAND_OP_VARIANTS(write_cache_variants,
  26                 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  27                 SPINAND_PROG_LOAD(true, 0, NULL, 0));
  28
  29 static SPINAND_OP_VARIANTS(update_cache_variants,
  30                 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
  31                 SPINAND_PROG_LOAD(false, 0, NULL, 0));
  32
  33 static int gd5fxgq4xa_ooblayout_ecc(struct mtd_info *mtd, int section,
  34                                   struct mtd_oob_region *region)
  35 {
  36         if (section > 3)
  37                 return -ERANGE;
  38
  39         region->offset = (16 * section) + 8;
  40         region->length = 8;
  41
  42         return 0;
  43 }
  44
  45 static int gd5fxgq4xa_ooblayout_free(struct mtd_info *mtd, int section,
  46                                    struct mtd_oob_region *region)
  47 {
  48         if (section > 3)
  49                 return -ERANGE;
  50
  51         if (section) {
  52                 region->offset = 16 * section;
  53                 region->length = 8;
  54         } else {
  55                 /* section 0 has one byte reserved for bad block mark */
  56                 region->offset = 1;
  57                 region->length = 7;
  58         }
  59         return 0;
  60 }
  61
  62 static int gd5fxgq4xa_ecc_get_status(struct spinand_device *spinand,
  63                                          u8 status)
  64 {
  65         switch (status & STATUS_ECC_MASK) {
  66         case STATUS_ECC_NO_BITFLIPS:
  67                 return 0;
  68
  69         case GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS:
  70                 /* 1-7 bits are flipped. return the maximum. */
  71                 return 7;
  72
  73         case GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS:
  74                 return 8;
  75
  76         case STATUS_ECC_UNCOR_ERROR:
  77                 return -EBADMSG;
  78
  79         default:
  80                 break;
  81         }
  82
  83         return -EINVAL;
  84 }
  85
  86 static int gd5fxgq4uexxg_ooblayout_ecc(struct mtd_info *mtd, int section,
  87                                        struct mtd_oob_region *region)
  88 {
  89         if (section)
  90                 return -ERANGE;
  91
  92         region->offset = 64;
  93         region->length = 64;
  94
  95         return 0;
  96 }
  97
  98 static int gd5fxgq4uexxg_ooblayout_free(struct mtd_info *mtd, int section,
  99                                         struct mtd_oob_region *region)
 100 {
 101         if (section)
 102                 return -ERANGE;
 103
 104         /* Reserve 1 bytes for the BBM. */
 105         region->offset = 1;
 106         region->length = 63;
 107
 108         return 0;
 109 }
 110
 111 static int gd5fxgq4uexxg_ecc_get_status(struct spinand_device *spinand,
 112                                         u8 status)
 113 {
 114         u8 status2;
 115         struct spi_mem_op op = SPINAND_GET_FEATURE_OP(GD5FXGQ4UEXXG_REG_STATUS2,
 116                                                       &status2);
 117         int ret;
 118
 119         switch (status & STATUS_ECC_MASK) {
 120         case STATUS_ECC_NO_BITFLIPS:
 121                 return 0;
 122
 123         case GD5FXGQ4XA_STATUS_ECC_1_7_BITFLIPS:
 124                 /*
 125                  * Read status2 register to determine a more fine grained
 126                  * bit error status
 127                  */
 128                 ret = spi_mem_exec_op(spinand->spimem, &op);
 129                 if (ret)
 130                         return ret;
 131
 132                 /*
 133                  * 4 ... 7 bits are flipped (1..4 can't be detected, so
 134                  * report the maximum of 4 in this case
 135                  */
 136                 /* bits sorted this way (3...0): ECCS1,ECCS0,ECCSE1,ECCSE0 */
 137                 return ((status & STATUS_ECC_MASK) >> 2) |
 138                         ((status2 & STATUS_ECC_MASK) >> 4);
 139
 140         case GD5FXGQ4XA_STATUS_ECC_8_BITFLIPS:
 141                 return 8;
 142
 143         case STATUS_ECC_UNCOR_ERROR:
 144                 return -EBADMSG;
 145
 146         default:
 147                 break;
 148         }
 149
 150         return -EINVAL;
 151 }
 152
 153 static const struct mtd_ooblayout_ops gd5fxgq4xa_ooblayout = {
 154         .ecc = gd5fxgq4xa_ooblayout_ecc,
 155         .free = gd5fxgq4xa_ooblayout_free,
 156 };
 157
 158 static const struct mtd_ooblayout_ops gd5fxgq4uexxg_ooblayout = {
 159         .ecc = gd5fxgq4uexxg_ooblayout_ecc,
 160         .free = gd5fxgq4uexxg_ooblayout_free,
 161 };
 162
 163 static const struct spinand_info gigadevice_spinand_table[] = {
 164         SPINAND_INFO("GD5F1GQ4xA", 0xF1,
 165                      NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
 166                      NAND_ECCREQ(8, 512),
 167                      SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 168                                               &write_cache_variants,
 169                                               &update_cache_variants),
 170                      0,
 171                      SPINAND_ECCINFO(&gd5fxgq4xa_ooblayout,
 172                                      gd5fxgq4xa_ecc_get_status)),
 173         SPINAND_INFO("GD5F2GQ4xA", 0xF2,
 174                      NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
 175                      NAND_ECCREQ(8, 512),
 176                      SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 177                                               &write_cache_variants,
 178                                               &update_cache_variants),
 179                      0,
 180                      SPINAND_ECCINFO(&gd5fxgq4xa_ooblayout,
 181                                      gd5fxgq4xa_ecc_get_status)),
 182         SPINAND_INFO("GD5F4GQ4xA", 0xF4,
 183                      NAND_MEMORG(1, 2048, 64, 64, 4096, 80, 1, 1, 1),
 184                      NAND_ECCREQ(8, 512),
 185                      SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 186                                               &write_cache_variants,
 187                                               &update_cache_variants),
 188                      0,
 189                      SPINAND_ECCINFO(&gd5fxgq4xa_ooblayout,
 190                                      gd5fxgq4xa_ecc_get_status)),
 191         SPINAND_INFO("GD5F1GQ4UExxG", 0xd1,
 192                      NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
 193                      NAND_ECCREQ(8, 512),
 194                      SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 195                                               &write_cache_variants,
 196                                               &update_cache_variants),
 197                      0,
 198                      SPINAND_ECCINFO(&gd5fxgq4uexxg_ooblayout,
 199                                      gd5fxgq4uexxg_ecc_get_status)),
 200 };
 201
 202 static int gigadevice_spinand_detect(struct spinand_device *spinand)
 203 {
 204         u8 *id = spinand->id.data;
 205         int ret;
 206
 207         /*
 208          * For GD NANDs, There is an address byte needed to shift in before IDs
 209          * are read out, so the first byte in raw_id is dummy.
 210          */
 211         if (id[1] != SPINAND_MFR_GIGADEVICE)
 212                 return 0;
 213
 214         ret = spinand_match_and_init(spinand, gigadevice_spinand_table,
 215                                      ARRAY_SIZE(gigadevice_spinand_table),
 216                                      id[2]);
 217         if (ret)
 218                 return ret;
 219
 220         return 1;
 221 }
 222
 223 static const struct spinand_manufacturer_ops gigadevice_spinand_manuf_ops = {
 224         .detect = gigadevice_spinand_detect,
 225 };
 226
 227 const struct spinand_manufacturer gigadevice_spinand_manufacturer = {
 228         .id = SPINAND_MFR_GIGADEVICE,
 229         .name = "GigaDevice",
 230         .ops = &gigadevice_spinand_manuf_ops,
 231 };