diff options
author | Bo Shen <voice.shen@atmel.com> | 2013-11-15 03:12:38 (GMT) |
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committer | Andreas Bießmann <andreas.devel@googlemail.com> | 2013-12-01 21:38:51 (GMT) |
commit | c5e8885aab9d282fa480cfa359cf5fd84248abb8 (patch) | |
tree | e8b1c1e5ef968b2db060fba21c9b6cc7d27d75e5 /arch/arm/cpu/at91-common/spl.c | |
parent | 9d9289cb31d8c0bf4d3708df23a24edb4205165d (diff) | |
download | u-boot-fsl-qoriq-c5e8885aab9d282fa480cfa359cf5fd84248abb8.tar.xz |
arm: atmel: sama5d3: spl boot from fat fs SD card
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>
Diffstat (limited to 'arch/arm/cpu/at91-common/spl.c')
-rw-r--r-- | arch/arm/cpu/at91-common/spl.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm/cpu/at91-common/spl.c b/arch/arm/cpu/at91-common/spl.c new file mode 100644 index 0000000..37c0cc4 --- /dev/null +++ b/arch/arm/cpu/at91-common/spl.c @@ -0,0 +1,90 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen <voice.shen@atmel.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/at91_wdt.h> +#include <asm/arch/clk.h> +#include <spl.h> + +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(); +} |