mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-06 19:26:16 +09:00
e755d54392
To facilitate changing lowlevel_init to become s_init, move the current contents of s_init into board_init_f and add the rest of what board_init_f does here. In order to compile clean without CONFIG_SKIP_LOWLEVEL_INIT set, leave an empty stub of s_init(). It can be removed when lowlevel_init becomes s_init. Cc: Bo Shen <voice.shen@atmel.com> Cc: Andreas Bießmann <andreas.devel@googlemail.com> Tested-by: Matt Porter <mporter@konsulko.com> on sama5d3_xplained Signed-off-by: Tom Rini <trini@ti.com> [rebased on current master, leave s_init() as empty stub] Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
107 lines
2.1 KiB
C
107 lines
2.1 KiB
C
/*
|
|
* 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_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>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
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))
|
|
;
|
|
|
|
tmp = readl(&pmc->mor);
|
|
tmp &= ~AT91_PMC_MOR_OSCBYPASS;
|
|
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))
|
|
;
|
|
|
|
/* Wait until MAINRDY field is set to make sure main clock is stable */
|
|
while (!(readl(&pmc->mcfr) & AT91_PMC_MAINRDY))
|
|
;
|
|
|
|
#ifndef CONFIG_SAMA5D4
|
|
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)
|
|
{
|
|
switch_to_main_crystal_osc();
|
|
|
|
/* disable watchdog */
|
|
at91_disable_wdt();
|
|
|
|
/* 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();
|
|
|
|
preloader_console_init();
|
|
|
|
mem_init();
|
|
|
|
/* Clear the BSS. */
|
|
memset(__bss_start, 0, __bss_end - __bss_start);
|
|
|
|
board_init_r(NULL, 0);
|
|
}
|