arch/arm/mach-uniphier/board_late_init.c

   1 /*
   2  * Copyright (C) 2014 Panasonic Corporation
   3  *   Author: Masahiro Yamada <[email protected]>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <spl.h>
  10 #include <nand.h>
  11 #include <asm/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 int board_late_init(void)
  30 {
  31         puts("MODE:  ");
  32
  33         switch (spl_boot_device()) {
  34         case BOOT_DEVICE_MMC1:
  35                 printf("eMMC Boot\n");
  36                 setenv("bootmode", "emmcboot");
  37                 break;
  38         case BOOT_DEVICE_NAND:
  39                 printf("NAND Boot\n");
  40                 setenv("bootmode", "nandboot");
  41                 nand_denali_wp_disable();
  42                 break;
  43         case BOOT_DEVICE_NOR:
  44                 printf("NOR Boot\n");
  45                 setenv("bootmode", "norboot");
  46                 break;
  47         default:
  48                 printf("Unsupported Boot Mode\n");
  49                 return -1;
  50         }
  51
  52         return 0;
  53 }