Enable Atmel sama5d3xek boart spl boot support, which can load u-boot from SD card with FAT file system. Signed-off-by: Bo Shen <voice.shen@atmel.com> Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>master
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/*
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* Copyright (C) 2013 Atmel Corporation |
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* Bo Shen <voice.shen@atmel.com> |
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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 <asm/io.h> |
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#include <asm/arch/at91_common.h> |
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#include <asm/arch/at91_pmc.h> |
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#include <asm/arch/at91_wdt.h> |
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#include <asm/arch/clk.h> |
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#include <spl.h> |
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static void at91_disable_wdt(void) |
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{ |
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struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT; |
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writel(AT91_WDT_MR_WDDIS, &wdt->mr); |
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} |
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void at91_plla_init(u32 pllar) |
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{ |
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; |
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writel(pllar, &pmc->pllar); |
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while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) |
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; |
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} |
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void at91_mck_init(u32 mckr) |
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{ |
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; |
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u32 tmp; |
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tmp = readl(&pmc->mckr); |
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tmp &= ~(AT91_PMC_MCKR_PRES_MASK | |
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AT91_PMC_MCKR_MDIV_MASK | |
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AT91_PMC_MCKR_PLLADIV_2); |
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tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK | |
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AT91_PMC_MCKR_MDIV_MASK | |
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AT91_PMC_MCKR_PLLADIV_2); |
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writel(tmp, &pmc->mckr); |
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while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) |
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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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#ifdef CONFIG_SYS_USE_MMC |
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return BOOT_DEVICE_MMC1; |
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#endif |
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return BOOT_DEVICE_NONE; |
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} |
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u32 spl_boot_mode(void) |
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{ |
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switch (spl_boot_device()) { |
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#ifdef CONFIG_SYS_USE_MMC |
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case BOOT_DEVICE_MMC1: |
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return MMCSD_MODE_FAT; |
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break; |
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#endif |
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case BOOT_DEVICE_NONE: |
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default: |
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hang(); |
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} |
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} |
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void s_init(void) |
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{ |
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/* disable watchdog */ |
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at91_disable_wdt(); |
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/* PMC configuration */ |
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at91_pmc_init(); |
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at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK); |
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timer_init(); |
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board_early_init_f(); |
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preloader_console_init(); |
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mem_init(); |
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} |
@ -0,0 +1,50 @@ |
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/* |
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* (C) Copyright 2002 |
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* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de> |
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* |
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* (C) Copyright 2010 |
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* Texas Instruments, <www.ti.com> |
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* Aneesh V <aneesh@ti.com> |
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* |
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* (C) 2013 Atmel Corporation |
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* Bo Shen <voice.shen@atmel.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE, \ |
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LENGTH = CONFIG_SPL_MAX_SIZE } |
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MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \ |
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LENGTH = CONFIG_SPL_BSS_MAX_SIZE } |
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OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") |
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OUTPUT_ARCH(arm) |
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ENTRY(_start) |
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SECTIONS |
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{ |
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.text : |
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{ |
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__start = .; |
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arch/arm/cpu/armv7/start.o (.text*) |
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*(.text*) |
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} >.sram |
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. = ALIGN(4); |
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.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram |
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. = ALIGN(4); |
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.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram |
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. = ALIGN(4); |
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__image_copy_end = .; |
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_end = .; |
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.bss : |
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{ |
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. = ALIGN(4); |
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__bss_start = .; |
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*(.bss*) |
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. = ALIGN(4); |
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__bss_end = .; |
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} >.sdram |
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} |
@ -0,0 +1,20 @@ |
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/*
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* Copyright (C) 2013 Atmel Corporation |
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* Bo Shen <voice.shen@atmel.com> |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#ifndef _ASM_ARCH_SPL_H_ |
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#define _ASM_ARCH_SPL_H_ |
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enum { |
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BOOT_DEVICE_NONE, |
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#ifdef CONFIG_SYS_USE_MMC |
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BOOT_DEVICE_MMC1, |
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BOOT_DEVICE_MMC2, |
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BOOT_DEVICE_MMC2_2, |
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#endif |
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}; |
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#endif |
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