drivers/mtd/nand/spi/foresee.c

   1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
   2 /*
   3  * Copyright (c) 2023, SberDevices. All Rights Reserved.
   4  *
   5  * Author: Martin Kurbanov <mmkurbanov@salutedevices.com>
   6  */
   7
   8 #include <linux/device.h>
   9 #include <linux/kernel.h>
  10 #include <linux/mtd/spinand.h>
  11
  12 #define SPINAND_MFR_FORESEE             0xCD
  13
  14 static SPINAND_OP_VARIANTS(read_cache_variants,
  15                 SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
  16                 SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
  17                 SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  18                 SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  19
  20 static SPINAND_OP_VARIANTS(write_cache_variants,
  21                 SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  22                 SPINAND_PROG_LOAD(true, 0, NULL, 0));
  23
  24 static SPINAND_OP_VARIANTS(update_cache_variants,
  25                 SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
  26                 SPINAND_PROG_LOAD(false, 0, NULL, 0));
  27
  28 static int f35sqa002g_ooblayout_ecc(struct mtd_info *mtd, int section,
  29                                     struct mtd_oob_region *region)
  30 {
  31         return -ERANGE;
  32 }
  33
  34 static int f35sqa002g_ooblayout_free(struct mtd_info *mtd, int section,
  35                                      struct mtd_oob_region *region)
  36 {
  37         if (section)
  38                 return -ERANGE;
  39
  40         /* Reserve 2 bytes for the BBM. */
  41         region->offset = 2;
  42         region->length = 62;
  43
  44         return 0;
  45 }
  46
  47 static const struct mtd_ooblayout_ops f35sqa002g_ooblayout = {
  48         .ecc = f35sqa002g_ooblayout_ecc,
  49         .free = f35sqa002g_ooblayout_free,
  50 };
  51
  52 static int f35sqa002g_ecc_get_status(struct spinand_device *spinand, u8 status)
  53 {
  54         struct nand_device *nand = spinand_to_nand(spinand);
  55
  56         switch (status & STATUS_ECC_MASK) {
  57         case STATUS_ECC_NO_BITFLIPS:
  58                 return 0;
  59
  60         case STATUS_ECC_HAS_BITFLIPS:
  61                 return nanddev_get_ecc_conf(nand)->strength;
  62
  63         default:
  64                 break;
  65         }
  66
  67         /* More than 1-bit error was detected in one or more sectors and
  68          * cannot be corrected.
  69          */
  70         return -EBADMSG;
  71 }
  72
  73 static const struct spinand_info foresee_spinand_table[] = {
  74         SPINAND_INFO("F35SQA002G",
  75                      SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x72, 0x72),
  76                      NAND_MEMORG(1, 2048, 64, 64, 2048, 40, 1, 1, 1),
  77                      NAND_ECCREQ(1, 512),
  78                      SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
  79                                               &write_cache_variants,
  80                                               &update_cache_variants),
  81                      SPINAND_HAS_QE_BIT,
  82                      SPINAND_ECCINFO(&f35sqa002g_ooblayout,
  83                                      f35sqa002g_ecc_get_status)),
  84 };
  85
  86 static const struct spinand_manufacturer_ops foresee_spinand_manuf_ops = {
  87 };
  88
  89 const struct spinand_manufacturer foresee_spinand_manufacturer = {
  90         .id = SPINAND_MFR_FORESEE,
  91         .name = "FORESEE",
  92         .chips = foresee_spinand_table,
  93         .nchips = ARRAY_SIZE(foresee_spinand_table),
  94         .ops = &foresee_spinand_manuf_ops,
  95 };