arch/arm/mach-uniphier/board_late_init.c

   1 /*
   2  * Copyright (C) 2014-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <spl.h>
   9 #include <libfdt.h>
  10 #include <nand.h>
  11 #include <linux/io.h>
  12 #include <../drivers/mtd/nand/denali.h>
  13
  14 static void nand_denali_wp_disable(void)
  15 {
  16 #ifdef CONFIG_NAND_DENALI
  17         /*
  18          * Since the boot rom enables the write protection for NAND boot mode,
  19          * it must be disabled somewhere for "nand write", "nand erase", etc.
  20          * The workaround is here to not disturb the Denali NAND controller
  21          * driver just for a really SoC-specific thing.
  22          */
  23         void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
  24
  25         writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
  26 #endif
  27 }
  28
  29 struct uniphier_fdt_file {
  30         const char *compatible;
  31         const char *file_name;
  32 };
  33
  34 static const struct uniphier_fdt_file uniphier_fdt_files[] = {
  35         { "socionext,ph1-ld4-ref", "uniphier-ph1-ld4-ref.dtb", },
  36         { "socionext,ph1-ld6b-ref", "uniphier-ph1-ld6b-ref.dtb", },
  37         { "socionext,ph1-ld10-ref", "uniphier-ph1-ld10-ref.dtb", },
  38         { "socionext,ph1-pro4-ref", "uniphier-ph1-pro4-ref.dtb", },
  39         { "socionext,ph1-pro5-4kbox", "uniphier-ph1-pro5-4kbox.dtb", },
  40         { "socionext,ph1-sld3-ref", "uniphier-ph1-sld3-ref.dtb", },
  41         { "socionext,ph1-sld8-ref", "uniphier-ph1-sld8-ref.dtb", },
  42         { "socionext,proxstream2-gentil", "uniphier-proxstream2-gentil.dtb", },
  43         { "socionext,proxstream2-vodka", "uniphier-proxstream2-vodka.dtb", },
  44 };
  45
  46 static void uniphier_set_fdt_file(void)
  47 {
  48         DECLARE_GLOBAL_DATA_PTR;
  49         int i;
  50
  51         /* lookup DTB file name based on the compatible string */
  52         for (i = 0; i < ARRAY_SIZE(uniphier_fdt_files); i++) {
  53                 if (!fdt_node_check_compatible(gd->fdt_blob, 0,
  54                                         uniphier_fdt_files[i].compatible)) {
  55                         setenv("fdt_file", uniphier_fdt_files[i].file_name);
  56                         return;
  57                 }
  58         }
  59 }
  60
  61 int board_late_init(void)
  62 {
  63         puts("MODE:  ");
  64
  65         switch (spl_boot_device()) {
  66         case BOOT_DEVICE_MMC1:
  67                 printf("eMMC Boot\n");
  68                 setenv("bootmode", "emmcboot");
  69                 break;
  70         case BOOT_DEVICE_NAND:
  71                 printf("NAND Boot\n");
  72                 setenv("bootmode", "nandboot");
  73                 nand_denali_wp_disable();
  74                 break;
  75         case BOOT_DEVICE_NOR:
  76                 printf("NOR Boot\n");
  77                 setenv("bootmode", "norboot");
  78                 break;
  79         default:
  80                 printf("Unsupported Boot Mode\n");
  81                 return -1;
  82         }
  83
  84         uniphier_set_fdt_file();
  85
  86         return 0;
  87 }