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 #include "boot-mode/boot-device.h"
  15
  16 static void nand_denali_wp_disable(void)
  17 {
  18 #ifdef CONFIG_NAND_DENALI
  19         /*
  20          * Since the boot rom enables the write protection for NAND boot mode,
  21          * it must be disabled somewhere for "nand write", "nand erase", etc.
  22          * The workaround is here to not disturb the Denali NAND controller
  23          * driver just for a really SoC-specific thing.
  24          */
  25         void __iomem *denali_reg = (void __iomem *)CONFIG_SYS_NAND_REGS_BASE;
  26
  27         writel(WRITE_PROTECT__FLAG, denali_reg + WRITE_PROTECT);
  28 #endif
  29 }
  30
  31 #define VENDOR_PREFIX           "socionext,"
  32 #define DTB_FILE_PREFIX         "uniphier-"
  33
  34 static int uniphier_set_fdt_file(void)
  35 {
  36         DECLARE_GLOBAL_DATA_PTR;
  37         const char *compat;
  38         char dtb_name[256];
  39         int buf_len = 256;
  40         int ret;
  41
  42         if (getenv("fdt_file"))
  43                 return 0;       /* do nothing if it is already set */
  44
  45         ret = fdt_get_string(gd->fdt_blob, 0, "compatible", &compat);
  46         if (ret)
  47                 return -EINVAL;
  48
  49         if (strncmp(compat, VENDOR_PREFIX, strlen(VENDOR_PREFIX)))
  50                 return -EINVAL;
  51
  52         compat += strlen(VENDOR_PREFIX);
  53
  54         strncat(dtb_name, DTB_FILE_PREFIX, buf_len);
  55         buf_len -= strlen(DTB_FILE_PREFIX);
  56
  57         strncat(dtb_name, compat, buf_len);
  58         buf_len -= strlen(compat);
  59
  60         strncat(dtb_name, ".dtb", buf_len);
  61
  62         return setenv("fdt_file", dtb_name);
  63 }
  64
  65 int board_late_init(void)
  66 {
  67         puts("MODE:  ");
  68
  69         switch (spl_boot_device_raw()) {
  70         case BOOT_DEVICE_MMC1:
  71                 printf("eMMC Boot\n");
  72                 setenv("bootmode", "emmcboot");
  73                 break;
  74         case BOOT_DEVICE_NAND:
  75                 printf("NAND Boot\n");
  76                 setenv("bootmode", "nandboot");
  77                 nand_denali_wp_disable();
  78                 break;
  79         case BOOT_DEVICE_NOR:
  80                 printf("NOR Boot\n");
  81                 setenv("bootmode", "norboot");
  82                 break;
  83         case BOOT_DEVICE_USB:
  84                 printf("USB Boot\n");
  85                 setenv("bootmode", "usbboot");
  86                 break;
  87         default:
  88                 printf("Unknown\n");
  89                 break;
  90         }
  91
  92         if (uniphier_set_fdt_file())
  93                 printf("fdt_file environment was not set correctly\n");
  94
  95         return 0;
  96 }