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 <nand.h>
  10 #include <linux/io.h>
  11 #include <../drivers/mtd/nand/denali.h>
  12
  13 static void nand_denali_wp_disable(void)
  14 {
  15 #ifdef CONFIG_NAND_DENALI
  16         /*
  17          * Since the boot rom enables the write protection for NAND boot mode,
  18          * it must be disabled somewhere for "nand write", "nand erase", etc.
  19          * The workaround is here to not disturb the Denali NAND controller
  20          * driver just for a really SoC-specific thing.
  21          */
  22         void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
  23
  24         writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
  25 #endif
  26 }
  27
  28 int board_late_init(void)
  29 {
  30         puts("MODE:  ");
  31
  32         switch (spl_boot_device()) {
  33         case BOOT_DEVICE_MMC1:
  34                 printf("eMMC Boot\n");
  35                 setenv("bootmode", "emmcboot");
  36                 break;
  37         case BOOT_DEVICE_NAND:
  38                 printf("NAND Boot\n");
  39                 setenv("bootmode", "nandboot");
  40                 nand_denali_wp_disable();
  41                 break;
  42         case BOOT_DEVICE_NOR:
  43                 printf("NOR Boot\n");
  44                 setenv("bootmode", "norboot");
  45                 break;
  46         default:
  47                 printf("Unsupported Boot Mode\n");
  48                 return -1;
  49         }
  50
  51         return 0;
  52 }