package/boot/uboot-mediatek/patches/100-10-cmd-mtd-add-markbad-subcommand-for-NMBM-testing.patch

   1 From 6dbbc8affb6ab22f940d13d0e928d5e881127ca4 Mon Sep 17 00:00:00 2001
   2 From: Weijie Gao <weijie.gao@mediatek.com>
   3 Date: Mon, 25 Jul 2022 11:22:57 +0800
   4 Subject: [PATCH 44/71] cmd: mtd: add markbad subcommand for NMBM testing
   5
   6 This patch adds:
   7 * Mark bad block on lower mtd device and erase on upper mtd
   8 device, which will trigger remapping:
   9 $ mtd markbad spi-nand0 0x20000 (mark block1 as bad)
  10 $ mtd erase nmbm0 0x20000 0x20000 (let nmbm detect the bad block and remap it)
  11
  12 * Clear bad block mark through:
  13 $ mtd erase.dontskipbad spi-nand0 0x20000 0x20000
  14 (After cleaning bad block mark, we need to rebuild nmbm manage table.)
  15
  16 Signed-off-by: SkyLake.Huang <skylake.huang@mediatek.com>
  17 ---
  18  cmd/mtd.c | 39 +++++++++++++++++++++++++++++++++++++++
  19  1 file changed, 39 insertions(+)
  20
  21 --- a/cmd/mtd.c
  22 +++ b/cmd/mtd.c
  23 @@ -504,6 +504,42 @@ out_put_mtd:
  24         return CMD_RET_SUCCESS;
  25  }
  26
  27 +static int do_mtd_markbad(struct cmd_tbl *cmdtp, int flag, int argc,
  28 +                         char * const argv[])
  29 +{
  30 +       struct mtd_info *mtd;
  31 +       loff_t off;
  32 +       int ret;
  33 +
  34 +       if (argc < 3)
  35 +               return CMD_RET_USAGE;
  36 +
  37 +       mtd = get_mtd_by_name(argv[1]);
  38 +       if (IS_ERR(mtd) || !mtd)
  39 +               return CMD_RET_FAILURE;
  40 +
  41 +       if (!mtd_can_have_bb(mtd)) {
  42 +               printf("Only NAND-based devices can have mark blocks\n");
  43 +               goto out_put_mtd;
  44 +       }
  45 +
  46 +       off = simple_strtoull(argv[2], NULL, 0);
  47 +
  48 +       ret = mtd_block_markbad(mtd, off);
  49 +       if (!ret) {
  50 +               printf("MTD device %s block at 0x%08llx marked bad\n",
  51 +                      mtd->name, off);
  52 +       } else {
  53 +               printf("MTD device %s block at 0x%08llx mark bad failed\n",
  54 +                      mtd->name, off);
  55 +       }
  56 +
  57 +out_put_mtd:
  58 +       put_mtd_device(mtd);
  59 +
  60 +       return CMD_RET_SUCCESS;
  61 +}
  62 +
  63  #ifdef CONFIG_AUTO_COMPLETE
  64  static int mtd_name_complete(int argc, char *const argv[], char last_char,
  65                              int maxv, char *cmdv[])
  66 @@ -552,6 +588,7 @@ static char mtd_help_text[] =
  67         "\n"
  68         "Specific functions:\n"
  69         "mtd bad                               <name>\n"
  70 +       "mtd markbad                           <name> <off>\n"
  71         "\n"
  72         "With:\n"
  73         "\t<name>: NAND partition/chip name (or corresponding DM device name or OF path)\n"
  74 @@ -577,4 +614,6 @@ U_BOOT_CMD_WITH_SUBCMDS(mtd, "MTD utils"
  75                 U_BOOT_SUBCMD_MKENT_COMPLETE(erase, 4, 0, do_mtd_erase,
  76                                              mtd_name_complete),
  77                 U_BOOT_SUBCMD_MKENT_COMPLETE(bad, 2, 1, do_mtd_bad,
  78 +                                            mtd_name_complete),
  79 +               U_BOOT_SUBCMD_MKENT_COMPLETE(markbad, 3, 1, do_mtd_markbad,
  80                                              mtd_name_complete));