diff options
Diffstat (limited to 'roms/u-boot/arch/arm/mach-mvebu/spl.c')
| -rw-r--r-- | roms/u-boot/arch/arm/mach-mvebu/spl.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/roms/u-boot/arch/arm/mach-mvebu/spl.c b/roms/u-boot/arch/arm/mach-mvebu/spl.c new file mode 100644 index 000000000..16ebb7a59 --- /dev/null +++ b/roms/u-boot/arch/arm/mach-mvebu/spl.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de> + */ + +#include <common.h> +#include <dm.h> +#include <debug_uart.h> +#include <fdtdec.h> +#include <hang.h> +#include <init.h> +#include <log.h> +#include <spl.h> +#include <asm/global_data.h> +#include <asm/io.h> +#include <asm/arch/cpu.h> +#include <asm/arch/soc.h> + +static u32 get_boot_device(void) +{ + u32 val; + u32 boot_device; + + /* + * First check, if UART boot-mode is active. This can only + * be done, via the bootrom error register. Here the + * MSB marks if the UART mode is active. + */ + val = readl(CONFIG_BOOTROM_ERR_REG); + boot_device = (val & BOOTROM_ERR_MODE_MASK) >> BOOTROM_ERR_MODE_OFFS; + debug("BOOTROM_REG=0x%08x boot_device=0x%x\n", val, boot_device); + if (boot_device == BOOTROM_ERR_MODE_UART) + return BOOT_DEVICE_UART; + +#ifdef CONFIG_ARMADA_38X + /* + * If the bootrom error code contains any other than zeros it's an + * error condition and the bootROM has fallen back to UART boot + */ + boot_device = (val & BOOTROM_ERR_CODE_MASK) >> BOOTROM_ERR_CODE_OFFS; + if (boot_device) + return BOOT_DEVICE_UART; +#endif + + /* + * Now check the SAR register for the strapped boot-device + */ + val = readl(CONFIG_SAR_REG); /* SAR - Sample At Reset */ + boot_device = (val & BOOT_DEV_SEL_MASK) >> BOOT_DEV_SEL_OFFS; + debug("SAR_REG=0x%08x boot_device=0x%x\n", val, boot_device); + switch (boot_device) { +#if defined(CONFIG_ARMADA_38X) + case BOOT_FROM_NAND: + return BOOT_DEVICE_NAND; +#endif +#ifdef CONFIG_SPL_MMC_SUPPORT + case BOOT_FROM_MMC: + case BOOT_FROM_MMC_ALT: + return BOOT_DEVICE_MMC1; +#endif + case BOOT_FROM_UART: +#ifdef BOOT_FROM_UART_ALT + case BOOT_FROM_UART_ALT: +#endif + return BOOT_DEVICE_UART; +#ifdef BOOT_FROM_SATA + case BOOT_FROM_SATA: + case BOOT_FROM_SATA_ALT: + return BOOT_DEVICE_SATA; +#endif + case BOOT_FROM_SPI: + default: + return BOOT_DEVICE_SPI; + }; +} + +u32 spl_boot_device(void) +{ + return get_boot_device(); +} + +void board_init_f(ulong dummy) +{ + int ret; + + /* + * Pin muxing needs to be done before UART output, since + * on A38x the UART pins need some re-muxing for output + * to work. + */ + board_early_init_f(); + + /* Example code showing how to enable the debug UART on MVEBU */ +#ifdef EARLY_UART + /* + * Debug UART can be used from here if required: + * + * debug_uart_init(); + * printch('a'); + * printhex8(0x1234); + * printascii("string"); + */ +#endif + + /* + * Use special translation offset for SPL. This needs to be + * configured *before* spl_init() is called as this function + * calls dm_init() which calls the bind functions of the + * device drivers. Here the base address needs to be configured + * (translated) correctly. + */ + gd->translation_offset = 0xd0000000 - 0xf1000000; + + ret = spl_init(); + if (ret) { + debug("spl_init() failed: %d\n", ret); + hang(); + } + + preloader_console_init(); + + timer_init(); + + /* Armada 375 does not support SerDes and DDR3 init yet */ +#if !defined(CONFIG_ARMADA_375) + /* First init the serdes PHY's */ + serdes_phy_config(); + + /* Setup DDR */ + ddr3_init(); +#endif + + /* Initialize Auto Voltage Scaling */ + mv_avs_init(); + + /* Update read timing control for PCIe */ + mv_rtc_config(); + + /* + * Return to the BootROM to continue the Marvell xmodem + * UART boot protocol. As initiated by the kwboot tool. + * + * This can only be done by the BootROM and not by the + * U-Boot SPL infrastructure, since the beginning of the + * image is already read and interpreted by the BootROM. + * SPL has no chance to receive this information. So we + * need to return to the BootROM to enable this xmodem + * UART download. + * + * If booting from NAND lets let the BootROM load the + * rest of the bootloader. + */ + switch (get_boot_device()) { + case BOOT_DEVICE_UART: +#if defined(CONFIG_ARMADA_38X) + case BOOT_DEVICE_NAND: +#endif + return_to_bootrom(); + } +} |