git.openwrt.org Git - openwrt/staging/neocturne.git/blob

   1 From 3552691616c940a7c4125c2678ba816653cd725e Mon Sep 17 00:00:00 2001
   2 From: Jeff Kletsky <git-commits@allycomm.com>
   3 Date: Tue, 18 Jun 2019 10:08:05 -0700
   4 Subject: [PATCH] mtd: spinand: Add initial support for Paragon PN26G0xA
   5
   6 Add initial support for Paragon Technology
   7 PN26G01Axxxxx and PN26G02Axxxxx SPI NAND
   8
   9 Datasheets available at
  10 http://www.xtxtech.com/upfile/2016082517274590.pdf
  11 http://www.xtxtech.com/upfile/2016082517282329.pdf
  12
  13 Signed-off-by: Jeff Kletsky <git-commits@allycomm.com>
  14 Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
  15 Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
  16
  17 ADOPTED FROM UPSTREAM   due to upstream commit 377e517b5fa5 in Linux 5.2
  18                         which added another parameter to NAND_MEMORG
  19 ---
  20  drivers/mtd/nand/spi/Makefile  |   2 +-
  21  drivers/mtd/nand/spi/core.c    |   1 +
  22  drivers/mtd/nand/spi/paragon.c | 147 +++++++++++++++++++++++++++++++++
  23  include/linux/mtd/spinand.h    |   1 +
  24  4 files changed, 150 insertions(+), 1 deletion(-)
  25  create mode 100644 drivers/mtd/nand/spi/paragon.c
  26
  27 --- a/drivers/mtd/nand/spi/Makefile
  28 +++ b/drivers/mtd/nand/spi/Makefile
  29 @@ -1,3 +1,3 @@
  30  # SPDX-License-Identifier: GPL-2.0
  31 -spinand-objs := core.o gigadevice.o macronix.o micron.o toshiba.o winbond.o
  32 +spinand-objs := core.o gigadevice.o macronix.o micron.o paragon.o toshiba.o winbond.o
  33  obj-$(CONFIG_MTD_SPI_NAND) += spinand.o
  34 --- a/drivers/mtd/nand/spi/core.c
  35 +++ b/drivers/mtd/nand/spi/core.c
  36 @@ -765,6 +765,7 @@ static const struct spinand_manufacturer
  37         &gigadevice_spinand_manufacturer,
  38         &macronix_spinand_manufacturer,
  39         &micron_spinand_manufacturer,
  40 +       &paragon_spinand_manufacturer,
  41         &toshiba_spinand_manufacturer,
  42         &winbond_spinand_manufacturer,
  43  };
  44 --- /dev/null
  45 +++ b/drivers/mtd/nand/spi/paragon.c
  46 @@ -0,0 +1,147 @@
  47 +// SPDX-License-Identifier: GPL-2.0
  48 +/*
  49 + * Copyright (C) 2019 Jeff Kletsky
  50 + *
  51 + * Author: Jeff Kletsky <git-commits@allycomm.com>
  52 + */
  53 +
  54 +#include <linux/device.h>
  55 +#include <linux/kernel.h>
  56 +#include <linux/mtd/spinand.h>
  57 +
  58 +
  59 +#define SPINAND_MFR_PARAGON    0xa1
  60 +
  61 +
  62 +#define PN26G0XA_STATUS_ECC_BITMASK            (3 << 4)
  63 +
  64 +#define PN26G0XA_STATUS_ECC_NONE_DETECTED      (0 << 4)
  65 +#define PN26G0XA_STATUS_ECC_1_7_CORRECTED      (1 << 4)
  66 +#define PN26G0XA_STATUS_ECC_ERRORED            (2 << 4)
  67 +#define PN26G0XA_STATUS_ECC_8_CORRECTED                (3 << 4)
  68 +
  69 +
  70 +static SPINAND_OP_VARIANTS(read_cache_variants,
  71 +               SPINAND_PAGE_READ_FROM_CACHE_QUADIO_OP(0, 2, NULL, 0),
  72 +               SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
  73 +               SPINAND_PAGE_READ_FROM_CACHE_DUALIO_OP(0, 1, NULL, 0),
  74 +               SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
  75 +               SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
  76 +               SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
  77 +
  78 +static SPINAND_OP_VARIANTS(write_cache_variants,
  79 +               SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
  80 +               SPINAND_PROG_LOAD(true, 0, NULL, 0));
  81 +
  82 +static SPINAND_OP_VARIANTS(update_cache_variants,
  83 +               SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
  84 +               SPINAND_PROG_LOAD(false, 0, NULL, 0));
  85 +
  86 +
  87 +static int pn26g0xa_ooblayout_ecc(struct mtd_info *mtd, int section,
  88 +                                  struct mtd_oob_region *region)
  89 +{
  90 +       if (section > 3)
  91 +               return -ERANGE;
  92 +
  93 +       region->offset = 6 + (15 * section); /* 4 BBM + 2 user bytes */
  94 +       region->length = 13;
  95 +
  96 +       return 0;
  97 +}
  98 +
  99 +static int pn26g0xa_ooblayout_free(struct mtd_info *mtd, int section,
 100 +                                  struct mtd_oob_region *region)
 101 +{
 102 +       if (section > 4)
 103 +               return -ERANGE;
 104 +
 105 +       if (section == 4) {
 106 +               region->offset = 64;
 107 +               region->length = 64;
 108 +       } else {
 109 +               region->offset = 4 + (15 * section);
 110 +               region->length = 2;
 111 +       }
 112 +
 113 +       return 0;
 114 +}
 115 +
 116 +static int pn26g0xa_ecc_get_status(struct spinand_device *spinand,
 117 +                                  u8 status)
 118 +{
 119 +       switch (status & PN26G0XA_STATUS_ECC_BITMASK) {
 120 +       case PN26G0XA_STATUS_ECC_NONE_DETECTED:
 121 +               return 0;
 122 +
 123 +       case PN26G0XA_STATUS_ECC_1_7_CORRECTED:
 124 +               return 7;       /* Return upper limit by convention */
 125 +
 126 +       case PN26G0XA_STATUS_ECC_8_CORRECTED:
 127 +               return 8;
 128 +
 129 +       case PN26G0XA_STATUS_ECC_ERRORED:
 130 +               return -EBADMSG;
 131 +
 132 +       default:
 133 +               break;
 134 +       }
 135 +
 136 +       return -EINVAL;
 137 +}
 138 +
 139 +static const struct mtd_ooblayout_ops pn26g0xa_ooblayout = {
 140 +       .ecc = pn26g0xa_ooblayout_ecc,
 141 +       .free = pn26g0xa_ooblayout_free,
 142 +};
 143 +
 144 +
 145 +static const struct spinand_info paragon_spinand_table[] = {
 146 +       SPINAND_INFO("PN26G01A", 0xe1,
 147 +                    NAND_MEMORG(1, 2048, 128, 64, 1024, 1, 1, 1),
 148 +                    NAND_ECCREQ(8, 512),
 149 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 150 +                                             &write_cache_variants,
 151 +                                             &update_cache_variants),
 152 +                    0,
 153 +                    SPINAND_ECCINFO(&pn26g0xa_ooblayout,
 154 +                                    pn26g0xa_ecc_get_status)),
 155 +       SPINAND_INFO("PN26G02A", 0xe2,
 156 +                    NAND_MEMORG(1, 2048, 128, 64, 2048, 1, 1, 1),
 157 +                    NAND_ECCREQ(8, 512),
 158 +                    SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
 159 +                                             &write_cache_variants,
 160 +                                             &update_cache_variants),
 161 +                    0,
 162 +                    SPINAND_ECCINFO(&pn26g0xa_ooblayout,
 163 +                                    pn26g0xa_ecc_get_status)),
 164 +};
 165 +
 166 +static int paragon_spinand_detect(struct spinand_device *spinand)
 167 +{
 168 +       u8 *id = spinand->id.data;
 169 +       int ret;
 170 +
 171 +       /* Read ID returns [0][MID][DID] */
 172 +
 173 +       if (id[1] != SPINAND_MFR_PARAGON)
 174 +               return 0;
 175 +
 176 +       ret = spinand_match_and_init(spinand, paragon_spinand_table,
 177 +                                    ARRAY_SIZE(paragon_spinand_table),
 178 +                                    id[2]);
 179 +       if (ret)
 180 +               return ret;
 181 +
 182 +       return 1;
 183 +}
 184 +
 185 +static const struct spinand_manufacturer_ops paragon_spinand_manuf_ops = {
 186 +       .detect = paragon_spinand_detect,
 187 +};
 188 +
 189 +const struct spinand_manufacturer paragon_spinand_manufacturer = {
 190 +       .id = SPINAND_MFR_PARAGON,
 191 +       .name = "Paragon",
 192 +       .ops = &paragon_spinand_manuf_ops,
 193 +};
 194 --- a/include/linux/mtd/spinand.h
 195 +++ b/include/linux/mtd/spinand.h
 196 @@ -227,6 +227,7 @@ struct spinand_manufacturer {
 197  extern const struct spinand_manufacturer gigadevice_spinand_manufacturer;
 198  extern const struct spinand_manufacturer macronix_spinand_manufacturer;
 199  extern const struct spinand_manufacturer micron_spinand_manufacturer;
 200 +extern const struct spinand_manufacturer paragon_spinand_manufacturer;
 201  extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
 202  extern const struct spinand_manufacturer winbond_spinand_manufacturer;
 203