target/linux/mediatek/patches-5.15/340-mtd-spinand-Add-support-for-the-Fidelix-FM35X1GA.patch

   1 From 5f49a5c9b16330e0df8f639310e4715dcad71947 Mon Sep 17 00:00:00 2001
   2 From: Davide Fioravanti <pantanastyle@gmail.com>
   3 Date: Fri, 8 Jan 2021 15:35:24 +0100
   4 Subject: [PATCH] mtd: spinand: Add support for the Fidelix FM35X1GA
   5
   6 Datasheet: http://www.hobos.com.cn/upload/datasheet/DS35X1GAXXX_100_rev00.pdf
   7
   8 Signed-off-by: Davide Fioravanti <pantanastyle@gmail.com>
   9 ---
  10  drivers/mtd/nand/spi/Makefile  |  2 +-
  11  drivers/mtd/nand/spi/core.c    |  1 +
  12  drivers/mtd/nand/spi/fidelix.c | 76 ++++++++++++++++++++++++++++++++++
  13  include/linux/mtd/spinand.h    |  1 +
  14  4 files changed, 79 insertions(+), 1 deletion(-)
  15  create mode 100644 drivers/mtd/nand/spi/fidelix.c
  16
  17 --- a/drivers/mtd/nand/spi/Makefile
  18 +++ b/drivers/mtd/nand/spi/Makefile
  19 @@ -1,3 +1,3 @@
  20  # SPDX-License-Identifier: GPL-2.0
  21 -spinand-objs := core.o esmt.o etron.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  22 +spinand-objs := core.o esmt.o etron.o fidelix.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  23  obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
  24 --- a/drivers/mtd/nand/spi/core.c
  25 +++ b/drivers/mtd/nand/spi/core.c
  26 @@ -939,6 +939,7 @@ static const struct nand_ops spinand_ops
  27
  28  static const struct spinand_manufacturer *spinand_manufacturers[] = {
  29         &esmt_c8_spinand_manufacturer,
  30 +       &fidelix_spinand_manufacturer,
  31         &gigadevice_spinand_manufacturer,
  32         &etron_spinand_manufacturer,
  33         &macronix_spinand_manufacturer,
  34 --- /dev/null
  35 +++ b/drivers/mtd/nand/spi/fidelix.c
  36 @@ -0,0 +1,76 @@
  37 +// SPDX-License-Identifier: GPL-2.0
  38 +/*
  39 + * Copyright (c) 2020 Davide Fioravanti <pantanastyle@gmail.com>
  40 + */
  41 +
  42 +#include <linux/device.h>
  43 +#include <linux/kernel.h>
  44 +#include <linux/mtd/spinand.h>
  45 +
  46 +#define SPINAND_MFR_FIDELIX            0xE5
  47 +#define FIDELIX_ECCSR_MASK             0x0F
  48 +
  49 +static SPINAND_OP_VARIANTS(read_cache_variants,
  50 +               SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
  51 +               SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  52 +               SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  53 +
  54 +static SPINAND_OP_VARIANTS(write_cache_variants,
  55 +               SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  56 +               SPINAND_PROG_LOAD(true, 0, NULL, 0));
  57 +
  58 +static SPINAND_OP_VARIANTS(update_cache_variants,
  59 +               SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
  60 +               SPINAND_PROG_LOAD(false, 0, NULL, 0));
  61 +
  62 +static int fm35x1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
  63 +                                 struct mtd_oob_region *region)
  64 +{
  65 +       if (section > 3)
  66 +               return -ERANGE;
  67 +
  68 +       region->offset = (16 * section) + 8;
  69 +       region->length = 8;
  70 +
  71 +       return 0;
  72 +}
  73 +
  74 +static int fm35x1ga_ooblayout_free(struct mtd_info *mtd, int section,
  75 +                                  struct mtd_oob_region *region)
  76 +{
  77 +       if (section > 3)
  78 +               return -ERANGE;
  79 +
  80 +       region->offset = (16 * section) + 2;
  81 +       region->length = 6;
  82 +
  83 +       return 0;
  84 +}
  85 +
  86 +static const struct mtd_ooblayout_ops fm35x1ga_ooblayout = {
  87 +       .ecc = fm35x1ga_ooblayout_ecc,
  88 +       .free = fm35x1ga_ooblayout_free,
  89 +};
  90 +
  91 +static const struct spinand_info fidelix_spinand_table[] = {
  92 +       SPINAND_INFO("FM35X1GA",
  93 +                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71),
  94 +                    NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
  95 +                    NAND_ECCREQ(4, 512),
  96 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
  97 +                                             &write_cache_variants,
  98 +                                             &update_cache_variants),
  99 +                    SPINAND_HAS_QE_BIT,
 100 +                    SPINAND_ECCINFO(&fm35x1ga_ooblayout, NULL)),
 101 +};
 102 +
 103 +static const struct spinand_manufacturer_ops fidelix_spinand_manuf_ops = {
 104 +};
 105 +
 106 +const struct spinand_manufacturer fidelix_spinand_manufacturer = {
 107 +       .id = SPINAND_MFR_FIDELIX,
 108 +       .name = "Fidelix",
 109 +       .chips = fidelix_spinand_table,
 110 +       .nchips = ARRAY_SIZE(fidelix_spinand_table),
 111 +       .ops = &fidelix_spinand_manuf_ops,
 112 +};
 113 --- a/include/linux/mtd/spinand.h
 114 +++ b/include/linux/mtd/spinand.h
 115 @@ -262,6 +262,7 @@ struct spinand_manufacturer {
 116  /* SPI NAND manufacturers */
 117  extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
 118  extern const struct spinand_manufacturer etron_spinand_manufacturer;
 119 +extern const struct spinand_manufacturer fidelix_spinand_manufacturer;
 120  extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 121  extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 122  extern const struct spinand_manufacturer micron_spinand_manufacturer;