target/linux/mediatek/patches-6.6/340-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 @@ -1,4 +1,4 @@
  20  # SPDX-License-Identifier: GPL-2.0
  21 -spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o gigadevice.o
  22 +spinand-objs := core.o alliancememory.o ato.o esmt.o etron.o fidelix.o gigadevice.o
  23  spinand-objs += macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  24  obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
  25 --- a/drivers/mtd/nand/spi/core.c
  26 +++ b/drivers/mtd/nand/spi/core.c
  27 @@ -941,6 +941,7 @@ static const struct spinand_manufacturer
  28         &alliancememory_spinand_manufacturer,
  29         &ato_spinand_manufacturer,
  30         &esmt_c8_spinand_manufacturer,
  31 +       &fidelix_spinand_manufacturer,
  32         &etron_spinand_manufacturer,
  33         &gigadevice_spinand_manufacturer,
  34         &macronix_spinand_manufacturer,
  35 --- /dev/null
  36 +++ b/drivers/mtd/nand/spi/fidelix.c
  37 @@ -0,0 +1,76 @@
  38 +// SPDX-License-Identifier: GPL-2.0
  39 +/*
  40 + * Copyright (c) 2020 Davide Fioravanti <pantanastyle@gmail.com>
  41 + */
  42 +
  43 +#include <linux/device.h>
  44 +#include <linux/kernel.h>
  45 +#include <linux/mtd/spinand.h>
  46 +
  47 +#define SPINAND_MFR_FIDELIX            0xE5
  48 +#define FIDELIX_ECCSR_MASK             0x0F
  49 +
  50 +static SPINAND_OP_VARIANTS(read_cache_variants,
  51 +               SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
  52 +               SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  53 +               SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  54 +
  55 +static SPINAND_OP_VARIANTS(write_cache_variants,
  56 +               SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  57 +               SPINAND_PROG_LOAD(true, 0, NULL, 0));
  58 +
  59 +static SPINAND_OP_VARIANTS(update_cache_variants,
  60 +               SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
  61 +               SPINAND_PROG_LOAD(false, 0, NULL, 0));
  62 +
  63 +static int fm35x1ga_ooblayout_ecc(struct mtd_info *mtd, int section,
  64 +                                 struct mtd_oob_region *region)
  65 +{
  66 +       if (section > 3)
  67 +               return -ERANGE;
  68 +
  69 +       region->offset = (16 * section) + 8;
  70 +       region->length = 8;
  71 +
  72 +       return 0;
  73 +}
  74 +
  75 +static int fm35x1ga_ooblayout_free(struct mtd_info *mtd, int section,
  76 +                                  struct mtd_oob_region *region)
  77 +{
  78 +       if (section > 3)
  79 +               return -ERANGE;
  80 +
  81 +       region->offset = (16 * section) + 2;
  82 +       region->length = 6;
  83 +
  84 +       return 0;
  85 +}
  86 +
  87 +static const struct mtd_ooblayout_ops fm35x1ga_ooblayout = {
  88 +       .ecc = fm35x1ga_ooblayout_ecc,
  89 +       .free = fm35x1ga_ooblayout_free,
  90 +};
  91 +
  92 +static const struct spinand_info fidelix_spinand_table[] = {
  93 +       SPINAND_INFO("FM35X1GA",
  94 +                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0x71),
  95 +                    NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
  96 +                    NAND_ECCREQ(4, 512),
  97 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
  98 +                                             &write_cache_variants,
  99 +                                             &update_cache_variants),
 100 +                    SPINAND_HAS_QE_BIT,
 101 +                    SPINAND_ECCINFO(&fm35x1ga_ooblayout, NULL)),
 102 +};
 103 +
 104 +static const struct spinand_manufacturer_ops fidelix_spinand_manuf_ops = {
 105 +};
 106 +
 107 +const struct spinand_manufacturer fidelix_spinand_manufacturer = {
 108 +       .id = SPINAND_MFR_FIDELIX,
 109 +       .name = "Fidelix",
 110 +       .chips = fidelix_spinand_table,
 111 +       .nchips = ARRAY_SIZE(fidelix_spinand_table),
 112 +       .ops = &fidelix_spinand_manuf_ops,
 113 +};
 114 --- a/include/linux/mtd/spinand.h
 115 +++ b/include/linux/mtd/spinand.h
 116 @@ -264,6 +264,7 @@ extern const struct spinand_manufacturer
 117  extern const struct spinand_manufacturer ato_spinand_manufacturer;
 118  extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
 119  extern const struct spinand_manufacturer etron_spinand_manufacturer;
 120 +extern const struct spinand_manufacturer fidelix_spinand_manufacturer;
 121  extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 122  extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 123  extern const struct spinand_manufacturer micron_spinand_manufacturer;