1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
8 #include <debug_uart.h>
12 #include <asm/arch/cpu.h>
13 #include <asm/arch/soc.h>
15 static u32 get_boot_device(void)
21 * First check, if UART boot-mode is active. This can only
22 * be done, via the bootrom error register. Here the
23 * MSB marks if the UART mode is active.
25 val = readl(CONFIG_BOOTROM_ERR_REG);
26 boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS;
27 debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device);
28 #if defined(CONFIG_ARMADA_38X)
30 * If the bootrom error register contains any else than zeros
31 * in the first 8 bits it's an error condition. And in that case
32 * try to boot from UART.
36 if (boot_device == BOOTROM_ERR_MODE_UART)
38 return BOOT_DEVICE_UART;
41 * Now check the SAR register for the strapped boot-device
43 val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
44 boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
45 debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device);
46 switch (boot_device) {
47 #if defined(CONFIG_ARMADA_38X)
49 return BOOT_DEVICE_NAND;
51 #ifdef CONFIG_SPL_MMC_SUPPORT
53 case BOOT_FROM_MMC_ALT:
54 return BOOT_DEVICE_MMC1;
57 #ifdef BOOT_FROM_UART_ALT
58 case BOOT_FROM_UART_ALT:
60 return BOOT_DEVICE_UART;
63 return BOOT_DEVICE_SPI;
67 u32 spl_boot_device(void)
69 return get_boot_device();
72 void board_init_f(ulong dummy)
77 * Pin muxing needs to be done before UART output, since
78 * on A38x the UART pins need some re-muxing for output
83 /* Example code showing how to enable the debug UART on MVEBU */
86 * Debug UART can be used from here if required:
91 * printascii("string");
97 debug("spl_init() failed: %d\n", ret);
101 /* Use special translation offset for SPL */
102 dm_set_translation_offset(0xd0000000 - 0xf1000000);
104 preloader_console_init();
108 /* Armada 375 does not support SerDes and DDR3 init yet */
109 #if !defined(CONFIG_ARMADA_375)
110 /* First init the serdes PHY's */
118 * Return to the BootROM to continue the Marvell xmodem
119 * UART boot protocol. As initiated by the kwboot tool.
121 * This can only be done by the BootROM and not by the
122 * U-Boot SPL infrastructure, since the beginning of the
123 * image is already read and interpreted by the BootROM.
124 * SPL has no chance to receive this information. So we
125 * need to return to the BootROM to enable this xmodem
128 * If booting from NAND lets let the BootROM load the
129 * rest of the bootloader.
131 switch (get_boot_device()) {
132 case BOOT_DEVICE_UART:
133 #if defined(CONFIG_ARMADA_38X)
134 case BOOT_DEVICE_NAND: