138 lines
2.8 KiB
C
138 lines
2.8 KiB
C
|
// SPDX-License-Identifier: GPL-2.0+
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2013 Atmel Corporation
|
||
|
|
* Bo Shen <voice.shen@atmel.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
#include <asm/io.h>
|
||
|
|
#include <asm/arch/at91_common.h>
|
||
|
|
#include <asm/arch/at91_pit.h>
|
||
|
|
#include <asm/arch/at91_pmc.h>
|
||
|
|
#include <asm/arch/at91_rstc.h>
|
||
|
|
#include <asm/arch/at91_wdt.h>
|
||
|
|
#include <asm/arch/clk.h>
|
||
|
|
#include <spl.h>
|
||
|
|
|
||
|
|
static void switch_to_main_crystal_osc(void)
|
||
|
|
{
|
||
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
||
|
|
u32 tmp;
|
||
|
|
|
||
|
|
tmp = readl(&pmc->mor);
|
||
|
|
tmp &= ~AT91_PMC_MOR_OSCOUNT(0xff);
|
||
|
|
tmp &= ~AT91_PMC_MOR_KEY(0xff);
|
||
|
|
tmp |= AT91_PMC_MOR_MOSCEN;
|
||
|
|
tmp |= AT91_PMC_MOR_OSCOUNT(8);
|
||
|
|
tmp |= AT91_PMC_MOR_KEY(0x37);
|
||
|
|
writel(tmp, &pmc->mor);
|
||
|
|
while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCS))
|
||
|
|
;
|
||
|
|
|
||
|
|
#if defined(CONFIG_SAMA5D2)
|
||
|
|
/* Enable a measurement of the external oscillator */
|
||
|
|
tmp = readl(&pmc->mcfr);
|
||
|
|
tmp |= AT91_PMC_MCFR_CCSS_XTAL_OSC;
|
||
|
|
tmp |= AT91_PMC_MCFR_RCMEAS;
|
||
|
|
writel(tmp, &pmc->mcfr);
|
||
|
|
|
||
|
|
while (!(readl(&pmc->mcfr) & AT91_PMC_MCFR_MAINRDY))
|
||
|
|
;
|
||
|
|
|
||
|
|
if (!(readl(&pmc->mcfr) & AT91_PMC_MCFR_MAINF_MASK))
|
||
|
|
hang();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
tmp = readl(&pmc->mor);
|
||
|
|
/*
|
||
|
|
* some boards have an external oscillator with driving.
|
||
|
|
* in this case we need to disable the internal SoC driving (bypass mode)
|
||
|
|
*/
|
||
|
|
#if defined(CONFIG_SPL_AT91_MCK_BYPASS)
|
||
|
|
tmp |= AT91_PMC_MOR_OSCBYPASS;
|
||
|
|
#else
|
||
|
|
tmp &= ~AT91_PMC_MOR_OSCBYPASS;
|
||
|
|
#endif
|
||
|
|
tmp &= ~AT91_PMC_MOR_KEY(0xff);
|
||
|
|
tmp |= AT91_PMC_MOR_KEY(0x37);
|
||
|
|
writel(tmp, &pmc->mor);
|
||
|
|
|
||
|
|
tmp = readl(&pmc->mor);
|
||
|
|
tmp |= AT91_PMC_MOR_MOSCSEL;
|
||
|
|
tmp &= ~AT91_PMC_MOR_KEY(0xff);
|
||
|
|
tmp |= AT91_PMC_MOR_KEY(0x37);
|
||
|
|
writel(tmp, &pmc->mor);
|
||
|
|
|
||
|
|
while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCSELS))
|
||
|
|
;
|
||
|
|
|
||
|
|
#if !defined(CONFIG_SAMA5D2)
|
||
|
|
/* Wait until MAINRDY field is set to make sure main clock is stable */
|
||
|
|
while (!(readl(&pmc->mcfr) & AT91_PMC_MAINRDY))
|
||
|
|
;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if !defined(CONFIG_SAMA5D4) && !defined(CONFIG_SAMA5D2)
|
||
|
|
tmp = readl(&pmc->mor);
|
||
|
|
tmp &= ~AT91_PMC_MOR_MOSCRCEN;
|
||
|
|
tmp &= ~AT91_PMC_MOR_KEY(0xff);
|
||
|
|
tmp |= AT91_PMC_MOR_KEY(0x37);
|
||
|
|
writel(tmp, &pmc->mor);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
__weak void matrix_init(void)
|
||
|
|
{
|
||
|
|
/* This only be used for sama5d4 soc now */
|
||
|
|
}
|
||
|
|
|
||
|
|
__weak void redirect_int_from_saic_to_aic(void)
|
||
|
|
{
|
||
|
|
/* This only be used for sama5d4 soc now */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* empty stub to satisfy current lowlevel_init, can be removed any time */
|
||
|
|
void s_init(void)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
void board_init_f(ulong dummy)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
switch_to_main_crystal_osc();
|
||
|
|
|
||
|
|
#ifdef CONFIG_SAMA5D2
|
||
|
|
configure_2nd_sram_as_l2_cache();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if !defined(CONFIG_WDT_AT91)
|
||
|
|
/* disable watchdog */
|
||
|
|
at91_disable_wdt();
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* PMC configuration */
|
||
|
|
at91_pmc_init();
|
||
|
|
|
||
|
|
at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
|
||
|
|
|
||
|
|
matrix_init();
|
||
|
|
|
||
|
|
redirect_int_from_saic_to_aic();
|
||
|
|
|
||
|
|
timer_init();
|
||
|
|
|
||
|
|
board_early_init_f();
|
||
|
|
|
||
|
|
mem_init();
|
||
|
|
|
||
|
|
ret = spl_init();
|
||
|
|
if (ret) {
|
||
|
|
debug("spl_init() failed: %d\n", ret);
|
||
|
|
hang();
|
||
|
|
}
|
||
|
|
|
||
|
|
preloader_console_init();
|
||
|
|
|
||
|
|
}
|