From c5e8885aab9d282fa480cfa359cf5fd84248abb8 Mon Sep 17 00:00:00 2001 From: Bo Shen Date: Fri, 15 Nov 2013 11:12:38 +0800 Subject: arm: atmel: sama5d3: spl boot from fat fs SD card MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Enable Atmel sama5d3xek boart spl boot support, which can load u-boot from SD card with FAT file system. Signed-off-by: Bo Shen Signed-off-by: Andreas Bießmann --- arch/arm/cpu/at91-common/Makefile | 2 +- arch/arm/cpu/at91-common/spl.c | 90 +++++++++++++++++++++++++++++++++ arch/arm/cpu/at91-common/u-boot-spl.lds | 50 ++++++++++++++++++ 3 files changed, 141 insertions(+), 1 deletion(-) create mode 100644 arch/arm/cpu/at91-common/spl.c create mode 100644 arch/arm/cpu/at91-common/u-boot-spl.lds (limited to 'arch/arm/cpu/at91-common') diff --git a/arch/arm/cpu/at91-common/Makefile b/arch/arm/cpu/at91-common/Makefile index 671a05e3d5..d97053ff0a 100644 --- a/arch/arm/cpu/at91-common/Makefile +++ b/arch/arm/cpu/at91-common/Makefile @@ -8,4 +8,4 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-$(CONFIG_SPL_BUILD) += mpddrc.o +obj-$(CONFIG_SPL_BUILD) += mpddrc.o spl.o diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c new file mode 100644 index 0000000000..37c0cc4be5 --- /dev/null +++ b/arch/arm/cpu/at91-common/spl.c @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include + +static void at91_disable_wdt(void) +{ + struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT; + + writel(AT91_WDT_MR_WDDIS, &wdt->mr); +} + +void at91_plla_init(u32 pllar) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + + writel(pllar, &pmc->pllar); + while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY))) + ; +} + +void at91_mck_init(u32 mckr) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 tmp; + + tmp = readl(&pmc->mckr); + tmp &= ~(AT91_PMC_MCKR_PRES_MASK | + AT91_PMC_MCKR_MDIV_MASK | + AT91_PMC_MCKR_PLLADIV_2); + tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK | + AT91_PMC_MCKR_MDIV_MASK | + AT91_PMC_MCKR_PLLADIV_2); + writel(tmp, &pmc->mckr); + + while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY)) + ; +} + + +u32 spl_boot_device(void) +{ +#ifdef CONFIG_SYS_USE_MMC + return BOOT_DEVICE_MMC1; +#endif + return BOOT_DEVICE_NONE; +} + +u32 spl_boot_mode(void) +{ + switch (spl_boot_device()) { +#ifdef CONFIG_SYS_USE_MMC + case BOOT_DEVICE_MMC1: + return MMCSD_MODE_FAT; + break; +#endif + case BOOT_DEVICE_NONE: + default: + hang(); + } +} + +void s_init(void) +{ + /* disable watchdog */ + at91_disable_wdt(); + + /* PMC configuration */ + at91_pmc_init(); + + at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK); + + timer_init(); + + board_early_init_f(); + + preloader_console_init(); + + mem_init(); +} diff --git a/arch/arm/cpu/at91-common/u-boot-spl.lds b/arch/arm/cpu/at91-common/u-boot-spl.lds new file mode 100644 index 0000000000..038335d3da --- /dev/null +++ b/arch/arm/cpu/at91-common/u-boot-spl.lds @@ -0,0 +1,50 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, + * + * (C) Copyright 2010 + * Texas Instruments, + * Aneesh V + * + * (C) 2013 Atmel Corporation + * Bo Shen + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE, \ + LENGTH = CONFIG_SPL_MAX_SIZE } +MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \ + LENGTH = CONFIG_SPL_BSS_MAX_SIZE } + +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) +ENTRY(_start) +SECTIONS +{ + .text : + { + __start = .; + arch/arm/cpu/armv7/start.o (.text*) + *(.text*) + } >.sram + + . = ALIGN(4); + .rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram + + . = ALIGN(4); + .data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram + + . = ALIGN(4); + __image_copy_end = .; + _end = .; + + .bss : + { + . = ALIGN(4); + __bss_start = .; + *(.bss*) + . = ALIGN(4); + __bss_end = .; + } >.sdram +} -- cgit v1.2.1