2 * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
4 * SPDX-License-Identifier: GPL-2.0+
9 #include <debug_uart.h>
13 #include <asm/arch/cpu.h>
14 #include <asm/arch/soc.h>
16 static u32 get_boot_device(void)
22 * First check, if UART boot-mode is active. This can only
23 * be done, via the bootrom error register. Here the
24 * MSB marks if the UART mode is active.
26 val = readl(CONFIG_BOOTROM_ERR_REG);
27 boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS;
28 debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device);
29 if (boot_device == BOOTROM_ERR_MODE_UART)
30 return BOOT_DEVICE_UART;
33 * Now check the SAR register for the strapped boot-device
35 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
36 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
37 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device);
38 switch (boot_device) {
39 #ifdef CONFIG_SPL_MMC_SUPPORT
41 case BOOT_FROM_MMC_ALT:
42 return BOOT_DEVICE_MMC1;
45 return BOOT_DEVICE_UART;
48 return BOOT_DEVICE_SPI;
52 u32 spl_boot_device(void)
54 return get_boot_device();
57 #ifdef CONFIG_SPL_MMC_SUPPORT
58 u32 spl_boot_mode(const u32 boot_device)
60 return MMCSD_MODE_RAW;
64 void board_init_f(ulong dummy)
69 * Pin muxing needs to be done before UART output, since
70 * on A38x the UART pins need some re-muxing for output
75 /* Example code showing how to enable the debug UART on MVEBU */
78 * Debug UART can be used from here if required:
83 * printascii("string");
89 debug("spl_init() failed: %d\n", ret);
93 /* Use special translation offset for SPL */
94 dm_set_translation_offset(0xd0000000 - 0xf1000000);
96 preloader_console_init();
100 /* Armada 375 does not support SerDes and DDR3 init yet */
101 #if !defined(CONFIG_ARMADA_375)
102 /* First init the serdes PHY's */
110 * Return to the BootROM to continue the Marvell xmodem
111 * UART boot protocol. As initiated by the kwboot tool.
113 * This can only be done by the BootROM and not by the
114 * U-Boot SPL infrastructure, since the beginning of the
115 * image is already read and interpreted by the BootROM.
116 * SPL has no chance to receive this information. So we
117 * need to return to the BootROM to enable this xmodem
120 if (get_boot_device() == BOOT_DEVICE_UART)