arch/arm/mach-mvebu/spl.c

   1 /*
   2  * Copyright (C) 2014-2015 Stefan Roese <sr@denx.de>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <debug_uart.h>
  10 #include <fdtdec.h>
  11 #include <spl.h>
  12 #include <asm/io.h>
  13 #include <asm/arch/cpu.h>
  14 #include <asm/arch/soc.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 u32 spl_boot_device(void)
  19 {
  20 #if defined(CONFIG_SPL_SPI_FLASH_SUPPORT)
  21         return BOOT_DEVICE_SPI;
  22 #endif
  23 #if defined(CONFIG_SPL_MMC_SUPPORT)
  24         return BOOT_DEVICE_MMC1;
  25 #endif
  26 }
  27
  28 #ifdef CONFIG_SPL_MMC_SUPPORT
  29 u32 spl_boot_mode(void)
  30 {
  31         return MMCSD_MODE_RAW;
  32 }
  33 #endif
  34
  35 void board_init_f(ulong dummy)
  36 {
  37         int ret;
  38
  39 #ifndef CONFIG_MVEBU_BOOTROM_UARTBOOT
  40         /*
  41          * Only call arch_cpu_init() when not returning to the
  42          * Marvell BootROM, which is done when booting via
  43          * the xmodem protocol (kwboot tool). Otherwise the
  44          * internal register will get remapped and the BootROM
  45          * can't continue to run correctly.
  46          */
  47
  48         /* Linux expects the internal registers to be at 0xf1000000 */
  49         arch_cpu_init();
  50 #endif
  51
  52         /*
  53          * Pin muxing needs to be done before UART output, since
  54          * on A38x the UART pins need some re-muxing for output
  55          * to work.
  56          */
  57         board_early_init_f();
  58
  59         /* Example code showing how to enable the debug UART on MVEBU */
  60 #ifdef EARLY_UART
  61         /*
  62          * Debug UART can be used from here if required:
  63          *
  64          * debug_uart_init();
  65          * printch('a');
  66          * printhex8(0x1234);
  67          * printascii("string");
  68          */
  69 #endif
  70
  71         ret = spl_init();
  72         if (ret) {
  73                 debug("spl_init() failed: %d\n", ret);
  74                 hang();
  75         }
  76
  77         /* Use special translation offset for SPL */
  78         dm_set_translation_offset(0xd0000000 - 0xf1000000);
  79
  80         preloader_console_init();
  81
  82         timer_init();
  83
  84         /* First init the serdes PHY's */
  85         serdes_phy_config();
  86
  87         /* Setup DDR */
  88         ddr3_init();
  89
  90 #ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT
  91         /*
  92          * Return to the BootROM to continue the Marvell xmodem
  93          * UART boot protocol. As initiated by the kwboot tool.
  94          *
  95          * This can only be done by the BootROM and not by the
  96          * U-Boot SPL infrastructure, since the beginning of the
  97          * image is already read and interpreted by the BootROM.
  98          * SPL has no chance to receive this information. So we
  99          * need to return to the BootROM to enable this xmodem
 100          * UART download.
 101          */
 102         return_to_bootrom();
 103 #endif
 104 }