diff options
Diffstat (limited to 'arch/arm/mach-mvebu/spl.c')
| -rw-r--r-- | arch/arm/mach-mvebu/spl.c | 87 |
1 files changed, 65 insertions, 22 deletions
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c index 0ab729aa5d..0879873b97 100644 --- a/arch/arm/mach-mvebu/spl.c +++ b/arch/arm/mach-mvebu/spl.c @@ -1,10 +1,13 @@ /* - * Copyright (C) 2014 Stefan Roese <sr@denx.de> + * Copyright (C) 2014-2016 Stefan Roese <sr@denx.de> * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> +#include <dm.h> +#include <debug_uart.h> +#include <fdtdec.h> #include <spl.h> #include <asm/io.h> #include <asm/arch/cpu.h> @@ -12,14 +15,45 @@ DECLARE_GLOBAL_DATA_PTR; -u32 spl_boot_device(void) +static u32 get_boot_device(void) { -#if defined(CONFIG_SPL_SPI_FLASH_SUPPORT) - return BOOT_DEVICE_SPI; -#endif -#if defined(CONFIG_SPL_MMC_SUPPORT) - return BOOT_DEVICE_MMC1; + 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; + + /* + * 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) { +#ifdef CONFIG_SPL_MMC_SUPPORT + case BOOT_FROM_MMC: + case BOOT_FROM_MMC_ALT: + return BOOT_DEVICE_MMC1; #endif + case BOOT_FROM_UART: + return BOOT_DEVICE_UART; + case BOOT_FROM_SPI: + default: + return BOOT_DEVICE_SPI; + }; +} + +u32 spl_boot_device(void) +{ + return get_boot_device(); } #ifdef CONFIG_SPL_MMC_SUPPORT @@ -31,18 +65,7 @@ u32 spl_boot_mode(void) void board_init_f(ulong dummy) { -#ifndef CONFIG_MVEBU_BOOTROM_UARTBOOT - /* - * Only call arch_cpu_init() when not returning to the - * Marvell BootROM, which is done when booting via - * the xmodem protocol (kwboot tool). Otherwise the - * internal register will get remapped and the BootROM - * can't continue to run correctly. - */ - - /* Linux expects the internal registers to be at 0xf1000000 */ - arch_cpu_init(); -#endif + int ret; /* * Pin muxing needs to be done before UART output, since @@ -51,6 +74,27 @@ void board_init_f(ulong dummy) */ 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 + + ret = spl_init(); + if (ret) { + debug("spl_init() failed: %d\n", ret); + hang(); + } + + /* Use special translation offset for SPL */ + dm_set_translation_offset(0xd0000000 - 0xf1000000); + preloader_console_init(); timer_init(); @@ -61,7 +105,6 @@ void board_init_f(ulong dummy) /* Setup DDR */ ddr3_init(); -#ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT /* * Return to the BootROM to continue the Marvell xmodem * UART boot protocol. As initiated by the kwboot tool. @@ -73,6 +116,6 @@ void board_init_f(ulong dummy) * need to return to the BootROM to enable this xmodem * UART download. */ - return_to_bootrom(); -#endif + if (get_boot_device() == BOOT_DEVICE_UART) + return_to_bootrom(); } |