mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 18:56:15 +09:00
09e89ab4af
This patch adds basic support for the Armada 375. Please note that currently the SerDes and DDR3 init code for the A375 is not included / enabled. This will be done in a later, follow-up patch. Right now, this A375 mainline U-Boot can only be used by chainloading it via the original Marvell U-Boot. This can be done via this command: => tftpboot 00800000 a375/u-boot-dtb.bin;go 00800000 Signed-off-by: Stefan Roese <sr@denx.de> Cc: Luka Perkov <luka.perkov@sartura.hr>
125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
/*
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* Copyright (C) 2014-2016 Stefan Roese <sr@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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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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DECLARE_GLOBAL_DATA_PTR;
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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 (boot_device == BOOTROM_ERR_MODE_UART)
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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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#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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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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#ifdef CONFIG_SPL_MMC_SUPPORT
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u32 spl_boot_mode(void)
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{
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return MMCSD_MODE_RAW;
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}
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#endif
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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 (get_boot_device() == BOOT_DEVICE_UART)
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return_to_bootrom();
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}
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