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 <asm/io.h>
   9 #include <asm/arch/at91_common.h>
  10 #include <asm/arch/at91_wdt.h>
  11 #include <asm/arch/clk.h>
  12 #include <spl.h>
  13
  14 #if !defined(CONFIG_AT91SAM9_WATCHDOG)
  15 void at91_disable_wdt(void)
  16 {
  17         struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
  18
  19         writel(AT91_WDT_MR_WDDIS, &wdt->mr);
  20 }
  21 #endif
  22
  23 #if defined(CONFIG_SAMA5D2) || defined(CONFIG_SAMA5D3) || \
  24     defined(CONFIG_SAMA5D4)
  25 #include <asm/arch/sama5_boot.h>
  26 struct {
  27         u32     r4;
  28 } bootrom_stash __attribute__((section(".data")));
  29
  30 u32 spl_boot_device(void)
  31 {
  32         u32 dev = (bootrom_stash.r4 >> ATMEL_SAMA5_BOOT_FROM_OFF) &
  33                   ATMEL_SAMA5_BOOT_FROM_MASK;
  34         u32 off = (bootrom_stash.r4 >> ATMEL_SAMA5_BOOT_DEV_ID_OFF) &
  35                   ATMEL_SAMA5_BOOT_DEV_ID_MASK;
  36
  37 #if defined(CONFIG_SYS_USE_MMC) || defined(CONFIG_SD_BOOT)
  38         if (dev == ATMEL_SAMA5_BOOT_FROM_MCI) {
  39 #if defined(CONFIG_SPL_OF_CONTROL)
  40                 return BOOT_DEVICE_MMC1;
  41 #else
  42                 if (off == 0)
  43                         return BOOT_DEVICE_MMC1;
  44                 if (off == 1)
  45                         return BOOT_DEVICE_MMC2;
  46                 printf("ERROR: MMC controller %i not present!\n", dev);
  47                 hang();
  48 #endif
  49         }
  50 #endif
  51
  52 #if defined(CONFIG_SYS_USE_SERIALFLASH) || \
  53         defined(CONFIG_SYS_USE_SPIFLASH) || \
  54         defined(CONFIG_SPI_BOOT)
  55         if (dev == ATMEL_SAMA5_BOOT_FROM_SPI)
  56                 return BOOT_DEVICE_SPI;
  57 #endif
  58         if (dev == ATMEL_SAMA5_BOOT_FROM_QSPI)
  59                 return BOOT_DEVICE_SPI;
  60
  61         if (dev == ATMEL_SAMA5_BOOT_FROM_SMC)
  62                 return BOOT_DEVICE_NAND;
  63
  64         if (dev == ATMEL_SAMA5_BOOT_FROM_SAMBA)
  65                 return BOOT_DEVICE_USB;
  66
  67         printf("ERROR: SMC/TWI/QSPI boot device not supported!\n"
  68                "       Boot device %i, controller number %i\n", dev, off);
  69
  70         return BOOT_DEVICE_NONE;
  71 }
  72 #else
  73 u32 spl_boot_device(void)
  74 {
  75 #if defined(CONFIG_SYS_USE_MMC) || defined(CONFIG_SD_BOOT)
  76         return BOOT_DEVICE_MMC1;
  77 #elif defined(CONFIG_SYS_USE_NANDFLASH) || defined(CONFIG_NAND_BOOT)
  78         return BOOT_DEVICE_NAND;
  79 #elif defined(CONFIG_SYS_USE_SERIALFLASH) || \
  80         defined(CONFIG_SYS_USE_SPIFLASH) || \
  81         defined(CONFIG_SPI_BOOT)
  82         return BOOT_DEVICE_SPI;
  83 #endif
  84         return BOOT_DEVICE_NONE;
  85 }
  86 #endif