arch/arm/mach-at91/spl.c

   1 /*
   2  * Copyright (C) 2013 Atmel Corporation
   3  *                    Bo Shen <voice.shen@atmel.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/at91_common.h>
  11 #include <asm/arch/at91_wdt.h>
  12 #include <asm/arch/clk.h>
  13 #include <spl.h>
  14
  15 #if defined(CONFIG_AT91SAM9_WATCHDOG)
  16 void at91_disable_wdt(void) { }
  17 #else
  18 void at91_disable_wdt(void)
  19 {
  20         struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
  21
  22         writel(AT91_WDT_MR_WDDIS, &wdt->mr);
  23 }
  24 #endif
  25
  26 u32 spl_boot_device(void)
  27 {
  28 #ifdef CONFIG_SYS_USE_MMC
  29         return BOOT_DEVICE_MMC1;
  30 #elif CONFIG_SYS_USE_NANDFLASH
  31         return BOOT_DEVICE_NAND;
  32 #elif CONFIG_SYS_USE_SERIALFLASH
  33         return BOOT_DEVICE_SPI;
  34 #endif
  35         return BOOT_DEVICE_NONE;
  36 }
  37
  38 u32 spl_boot_mode(void)
  39 {
  40         switch (spl_boot_device()) {
  41 #ifdef CONFIG_SYS_USE_MMC
  42         case BOOT_DEVICE_MMC1:
  43                 return MMCSD_MODE_FS;
  44                 break;
  45 #endif
  46         case BOOT_DEVICE_NONE:
  47         default:
  48                 hang();
  49         }
  50 }