u-boot/arch/arm/mach-at91/spl_atmel.c
Simon Glass db41d65a97 common: Move hang() to the same header as panic()
At present panic() is in the vsprintf.h header file. That does not seem
like an obvious choice for hang(), even though it relates to panic(). So
let's put hang() in its own header.

Signed-off-by: Simon Glass <sjg@chromium.org>
[trini: Migrate a few more files]
Signed-off-by: Tom Rini <trini@konsulko.com>
2020-01-17 17:53:40 -05:00

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 <hang.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();
}