mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
139 lines
3.1 KiB
C
139 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
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*/
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#include <common.h>
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#include <dm.h>
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#include <debug_uart.h>
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#include <fdtdec.h>
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#include <spl.h>
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#include <asm/io.h>
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#include <asm/arch/cpu.h>
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#include <asm/arch/soc.h>
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static u32 get_boot_device(void)
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{
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u32 val;
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u32 boot_device;
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/*
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* First check, if UART boot-mode is active. This can only
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* be done, via the bootrom error register. Here the
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* MSB marks if the UART mode is active.
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*/
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val = readl(CONFIG_BOOTROM_ERR_REG);
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boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS;
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debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device);
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#if defined(CONFIG_ARMADA_38X)
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/*
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* If the bootrom error register contains any else than zeros
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* in the first 8 bits it's an error condition. And in that case
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* try to boot from UART.
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*/
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if (boot_device)
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#else
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if (boot_device == BOOTROM_ERR_MODE_UART)
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#endif
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return BOOT_DEVICE_UART;
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/*
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* Now check the SAR register for the strapped boot-device
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*/
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val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */
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boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS;
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debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device);
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switch (boot_device) {
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#if defined(CONFIG_ARMADA_38X)
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case BOOT_FROM_NAND:
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return BOOT_DEVICE_NAND;
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#endif
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#ifdef CONFIG_SPL_MMC_SUPPORT
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case BOOT_FROM_MMC:
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case BOOT_FROM_MMC_ALT:
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return BOOT_DEVICE_MMC1;
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#endif
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case BOOT_FROM_UART:
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#ifdef BOOT_FROM_UART_ALT
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case BOOT_FROM_UART_ALT:
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#endif
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return BOOT_DEVICE_UART;
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case BOOT_FROM_SPI:
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default:
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return BOOT_DEVICE_SPI;
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};
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}
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u32 spl_boot_device(void)
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{
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return get_boot_device();
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}
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void board_init_f(ulong dummy)
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{
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int ret;
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/*
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* Pin muxing needs to be done before UART output, since
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* on A38x the UART pins need some re-muxing for output
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* to work.
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*/
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board_early_init_f();
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/* Example code showing how to enable the debug UART on MVEBU */
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#ifdef EARLY_UART
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/*
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* Debug UART can be used from here if required:
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*
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* debug_uart_init();
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* printch('a');
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* printhex8(0x1234);
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* printascii("string");
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*/
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#endif
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ret = spl_init();
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if (ret) {
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debug("spl_init() failed: %d\n", ret);
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hang();
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}
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/* Use special translation offset for SPL */
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dm_set_translation_offset(0xd0000000 - 0xf1000000);
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preloader_console_init();
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timer_init();
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/* Armada 375 does not support SerDes and DDR3 init yet */
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#if !defined(CONFIG_ARMADA_375)
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/* First init the serdes PHY's */
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serdes_phy_config();
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/* Setup DDR */
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ddr3_init();
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#endif
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/*
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* Return to the BootROM to continue the Marvell xmodem
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* UART boot protocol. As initiated by the kwboot tool.
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*
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* This can only be done by the BootROM and not by the
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* U-Boot SPL infrastructure, since the beginning of the
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* image is already read and interpreted by the BootROM.
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* SPL has no chance to receive this information. So we
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* need to return to the BootROM to enable this xmodem
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* UART download.
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*
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* If booting from NAND lets let the BootROM load the
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* rest of the bootloader.
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*/
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switch (get_boot_device()) {
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case BOOT_DEVICE_UART:
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#if defined(CONFIG_ARMADA_38X)
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case BOOT_DEVICE_NAND:
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#endif
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return_to_bootrom();
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}
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}
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