arch/arm/mach-at91/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2013 Atmel Corporation
   4  *                    Bo Shen <voice.shen@atmel.com>
   5  */
   6
   7 #include <common.h>
   8 #include <hang.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_WDT_AT91)
  16 void at91_disable_wdt(void)
  17 {
  18         struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
  19
  20         writel(AT91_WDT_MR_WDDIS, &wdt->mr);
  21 }
  22 #endif
  23
  24 #if defined(CONFIG_SAMA5D2) || defined(CONFIG_SAMA5D3) || \
  25     defined(CONFIG_SAMA5D4)
  26 #include <asm/arch/sama5_boot.h>
  27 struct {
  28         u32     r4;
  29 } bootrom_stash __attribute__((section(".data")));
  30
  31 u32 spl_boot_device(void)
  32 {
  33         u32 dev = (bootrom_stash.r4 >> ATMEL_SAMA5_BOOT_FROM_OFF) &
  34                   ATMEL_SAMA5_BOOT_FROM_MASK;
  35         u32 off = (bootrom_stash.r4 >> ATMEL_SAMA5_BOOT_DEV_ID_OFF) &
  36                   ATMEL_SAMA5_BOOT_DEV_ID_MASK;
  37
  38 #if defined(CONFIG_SYS_USE_MMC) || defined(CONFIG_SD_BOOT)
  39         if (dev == ATMEL_SAMA5_BOOT_FROM_MCI) {
  40 #if defined(CONFIG_SPL_OF_CONTROL)
  41                 return BOOT_DEVICE_MMC1;
  42 #else
  43                 if (off == 0)
  44                         return BOOT_DEVICE_MMC1;
  45                 if (off == 1)
  46                         return BOOT_DEVICE_MMC2;
  47                 printf("ERROR: MMC controller %i not present!\n", dev);
  48                 hang();
  49 #endif
  50         }
  51 #endif
  52
  53 #if defined(CONFIG_SYS_USE_SERIALFLASH) || \
  54         defined(CONFIG_SYS_USE_SPIFLASH) || \
  55         defined(CONFIG_SPI_BOOT)
  56         if (dev == ATMEL_SAMA5_BOOT_FROM_SPI)
  57                 return BOOT_DEVICE_SPI;
  58 #endif
  59         if (dev == ATMEL_SAMA5_BOOT_FROM_QSPI)
  60                 return BOOT_DEVICE_SPI;
  61
  62         if (dev == ATMEL_SAMA5_BOOT_FROM_SMC)
  63                 return BOOT_DEVICE_NAND;
  64
  65         if (dev == ATMEL_SAMA5_BOOT_FROM_SAMBA)
  66                 return BOOT_DEVICE_USB;
  67
  68         printf("ERROR: SMC/TWI/QSPI boot device not supported!\n"
  69                "       Boot device %i, controller number %i\n", dev, off);
  70
  71         return BOOT_DEVICE_NONE;
  72 }
  73 #else
  74 u32 spl_boot_device(void)
  75 {
  76 #if defined(CONFIG_SYS_USE_MMC) || defined(CONFIG_SD_BOOT)
  77         return BOOT_DEVICE_MMC1;
  78 #elif defined(CONFIG_SYS_USE_NANDFLASH) || defined(CONFIG_NAND_BOOT)
  79         return BOOT_DEVICE_NAND;
  80 #elif defined(CONFIG_SYS_USE_SERIALFLASH) || \
  81         defined(CONFIG_SYS_USE_SPIFLASH) || \
  82         defined(CONFIG_SPI_BOOT)
  83         return BOOT_DEVICE_SPI;
  84 #endif
  85         return BOOT_DEVICE_NONE;
  86 }
  87 #endif