2013-11-15 12:12:38 +09:00
|
|
|
/*
|
|
|
|
* 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;
|
2014-03-03 15:47:17 +09:00
|
|
|
#elif CONFIG_SYS_USE_NANDFLASH
|
|
|
|
return BOOT_DEVICE_NAND;
|
2014-03-03 15:47:15 +09:00
|
|
|
#elif CONFIG_SYS_USE_SERIALFLASH
|
|
|
|
return BOOT_DEVICE_SPI;
|
2013-11-15 12:12:38 +09:00
|
|
|
#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();
|
|
|
|
}
|