target/linux/generic/pending-5.15/486-01-mtd-spinand-add-support-for-ESMT-F50x1G41LB.patch

   1 From a43b844cb40bf1b783055fdc81b7f991e21e7e76 Mon Sep 17 00:00:00 2001
   2 From: Chuanhong Guo <gch981213@gmail.com>
   3 Date: Wed, 13 Apr 2022 11:58:17 +0800
   4 Subject: [PATCH] mtd: spinand: add support for ESMT F50x1G41LB
   5
   6 This patch adds support for ESMT F50L1G41LB and F50D1G41LB.
   7 It seems that ESMT likes to use random JEDEC ID from other vendors.
   8 Their 1G chips uses 0xc8 from GigaDevice and 2G/4G chips uses 0x2c from
   9 Micron. For this reason, the ESMT entry is named esmt_c8 with explicit
  10 JEDEC ID in variable name.
  11
  12 Datasheets:
  13 https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/F50L1G41LB(2M).pdf
  14 https://www.esmt.com.tw/upload/pdf/ESMT/datasheets/F50D1G41LB(2M).pdf
  15
  16 Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
  17 ---
  18  drivers/mtd/nand/spi/Makefile |  2 +-
  19  drivers/mtd/nand/spi/core.c   |  1 +
  20  drivers/mtd/nand/spi/esmt.c   | 89 +++++++++++++++++++++++++++++++++++
  21  include/linux/mtd/spinand.h   |  1 +
  22  4 files changed, 92 insertions(+), 1 deletion(-)
  23  create mode 100644 drivers/mtd/nand/spi/esmt.c
  24
  25 --- a/drivers/mtd/nand/spi/Makefile
  26 +++ b/drivers/mtd/nand/spi/Makefile
  27 @@ -1,3 +1,3 @@
  28  # SPDX-License-Identifier: GPL-2.0
  29 -spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  30 +spinand-objs := core.o esmt.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o xtx.o
  31  obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
  32 --- a/drivers/mtd/nand/spi/core.c
  33 +++ b/drivers/mtd/nand/spi/core.c
  34 @@ -906,6 +906,7 @@ static const struct nand_ops spinand_ops
  35  };
  36
  37  static const struct spinand_manufacturer *spinand_manufacturers[] = {
  38 +       &esmt_c8_spinand_manufacturer,
  39         &gigadevice_spinand_manufacturer,
  40         &macronix_spinand_manufacturer,
  41         &micron_spinand_manufacturer,
  42 --- /dev/null
  43 +++ b/drivers/mtd/nand/spi/esmt.c
  44 @@ -0,0 +1,89 @@
  45 +// SPDX-License-Identifier: GPL-2.0
  46 +/*
  47 + * Author:
  48 + *     Chuanhong Guo <gch981213@gmail.com>
  49 + */
  50 +
  51 +#include <linux/device.h>
  52 +#include <linux/kernel.h>
  53 +#include <linux/mtd/spinand.h>
  54 +
  55 +/* ESMT uses GigaDevice 0xc8 JECDEC ID on some SPI NANDs */
  56 +#define SPINAND_MFR_ESMT_C8                    0xc8
  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 +                          SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
  62 +                          SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
  63 +                          SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  64 +                          SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  65 +
  66 +static SPINAND_OP_VARIANTS(write_cache_variants,
  67 +                          SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  68 +                          SPINAND_PROG_LOAD(true, 0, NULL, 0));
  69 +
  70 +static SPINAND_OP_VARIANTS(update_cache_variants,
  71 +                          SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
  72 +                          SPINAND_PROG_LOAD(false, 0, NULL, 0));
  73 +
  74 +static int f50l1g41lb_ooblayout_ecc(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 + 8;
  81 +       region->length = 8;
  82 +
  83 +       return 0;
  84 +}
  85 +
  86 +static int f50l1g41lb_ooblayout_free(struct mtd_info *mtd, int section,
  87 +                                    struct mtd_oob_region *region)
  88 +{
  89 +       if (section > 3)
  90 +               return -ERANGE;
  91 +
  92 +       region->offset = 16 * section + 2;
  93 +       region->length = 6;
  94 +
  95 +       return 0;
  96 +}
  97 +
  98 +static const struct mtd_ooblayout_ops f50l1g41lb_ooblayout = {
  99 +       .ecc = f50l1g41lb_ooblayout_ecc,
 100 +       .free = f50l1g41lb_ooblayout_free,
 101 +};
 102 +
 103 +static const struct spinand_info esmt_c8_spinand_table[] = {
 104 +       SPINAND_INFO("F50L1G41LB",
 105 +                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x01),
 106 +                    NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
 107 +                    NAND_ECCREQ(1, 512),
 108 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 109 +                                             &write_cache_variants,
 110 +                                             &update_cache_variants),
 111 +                    0,
 112 +                    SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
 113 +       SPINAND_INFO("F50D1G41LB",
 114 +                    SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x11),
 115 +                    NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
 116 +                    NAND_ECCREQ(1, 512),
 117 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 118 +                                             &write_cache_variants,
 119 +                                             &update_cache_variants),
 120 +                    0,
 121 +                    SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
 122 +};
 123 +
 124 +static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = {
 125 +};
 126 +
 127 +const struct spinand_manufacturer esmt_c8_spinand_manufacturer = {
 128 +       .id = SPINAND_MFR_ESMT_C8,
 129 +       .name = "ESMT",
 130 +       .chips = esmt_c8_spinand_table,
 131 +       .nchips = ARRAY_SIZE(esmt_c8_spinand_table),
 132 +       .ops = &esmt_spinand_manuf_ops,
 133 +};
 134 --- a/include/linux/mtd/spinand.h
 135 +++ b/include/linux/mtd/spinand.h
 136 @@ -260,6 +260,7 @@ struct spinand_manufacturer {
 137  };
 138
 139  /* SPI NAND manufacturers */
 140 +extern const struct spinand_manufacturer esmt_c8_spinand_manufacturer;
 141  extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 142  extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 143  extern const struct spinand_manufacturer micron_spinand_manufacturer;