mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 15:37:23 +00:00
f4db6c976c
This patch adds runtime detection of the Marvell UART boot-mode (xmodem protocol). If this boot-mode is detected, SPL will return to the BootROM to continue the UART booting. With this patch its now possible, to generate a U-Boot image that can be booted either from the strapped boot-device (e.g. SPI NOR, MMC, etc) or via the xmodem protocol from the UART. In the UART case, the kwboot tool will dynamically insert the UART boot-device type into the image. And also patch the load address in the header, so that the mkimage header will be skipped (as its not expected by the Marvell BootROM). This simplifies the development for Armada XP / 38x based boards. As no special images need to be generated by selecting the MVEBU_BOOTROM_UARTBOOT Kconfig option. Since the Kconfig option MVEBU_BOOTROM_UARTBOOT is not needed any more, its now completely removed. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Luka Perkov <luka.perkov@sartura.hr> Cc: Dirk Eibach <dirk.eibach@gdsys.cc> Cc: Phil Sutter <phil@nwl.cc> Cc: Kevin Smith <kevin.smith@elecsyscorp.com>
121 lines
2.6 KiB
C
121 lines
2.6 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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/* 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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/*
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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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