mirror of
https://github.com/smaeul/u-boot.git
synced 2025-11-03 21:48:15 +00:00
ce4d04af99
This patch adds a call to spl_early_init() to board_init_f() which is needed when CONFIG_SPL_OF_CONTROL is configured. This is necessary for the early SPL setup including the DTB setup for later usage. Please note that this call might also be needed for non SPL_OF_CONTROL board, like the smartweb target. But smartweb fails to build with this call because its binary grows too big. So I disabled it for these kind of targets for now. Signed-off-by: Stefan Roese <sr@denx.de> Cc: Heiko Schocher <hs@denx.de> Cc: Andreas Bießmann <andreas@biessmann.org> Cc: Eugen Hristev <eugen.hristev@microchip.com> Reviewed-by: Heiko Schocher <hs@denx.de> Tested on the taurus board: Tested-by: Heiko Schocher <hs@denx.de>
145 lines
2.9 KiB
C
145 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2014 DENX Software Engineering
|
|
* Heiko Schocher <hs@denx.de>
|
|
*
|
|
* Based on:
|
|
* 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/at91sam9_matrix.h>
|
|
#include <asm/arch/at91_pit.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 enable_ext_reset(void)
|
|
{
|
|
struct at91_rstc *rstc = (struct at91_rstc *)ATMEL_BASE_RSTC;
|
|
|
|
writel(AT91_RSTC_KEY | AT91_RSTC_MR_URSTEN, &rstc->mr);
|
|
}
|
|
|
|
void lowlevel_clock_init(void)
|
|
{
|
|
struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
|
|
|
|
if (!(readl(&pmc->sr) & AT91_PMC_MOSCS)) {
|
|
/* Enable Main Oscillator */
|
|
writel(AT91_PMC_MOSCS | (0x40 << 8), &pmc->mor);
|
|
|
|
/* Wait until Main Oscillator is stable */
|
|
while (!(readl(&pmc->sr) & AT91_PMC_MOSCS))
|
|
;
|
|
}
|
|
|
|
/* After stabilization, switch to Main Oscillator */
|
|
if ((readl(&pmc->mckr) & AT91_PMC_CSS) == AT91_PMC_CSS_SLOW) {
|
|
unsigned long tmp;
|
|
|
|
tmp = readl(&pmc->mckr);
|
|
tmp &= ~AT91_PMC_CSS;
|
|
tmp |= AT91_PMC_CSS_MAIN;
|
|
writel(tmp, &pmc->mckr);
|
|
while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
|
|
;
|
|
|
|
tmp &= ~AT91_PMC_PRES;
|
|
tmp |= AT91_PMC_PRES_1;
|
|
writel(tmp, &pmc->mckr);
|
|
while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
|
|
;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
void __weak matrix_init(void)
|
|
{
|
|
}
|
|
|
|
void __weak at91_spl_board_init(void)
|
|
{
|
|
}
|
|
|
|
void __weak spl_board_init(void)
|
|
{
|
|
}
|
|
|
|
void board_init_f(ulong dummy)
|
|
{
|
|
#if CONFIG_IS_ENABLED(OF_CONTROL)
|
|
int ret;
|
|
|
|
ret = spl_early_init();
|
|
if (ret) {
|
|
debug("spl_early_init() failed: %d\n", ret);
|
|
hang();
|
|
}
|
|
#endif
|
|
|
|
lowlevel_clock_init();
|
|
#if !defined(CONFIG_WDT_AT91)
|
|
at91_disable_wdt();
|
|
#endif
|
|
|
|
/*
|
|
* At this stage the main oscillator is supposed to be enabled
|
|
* PCK = MCK = MOSC
|
|
*/
|
|
at91_pllicpr_init(0x00);
|
|
|
|
/* Configure PLLA = MOSC * (PLL_MULA + 1) / PLL_DIVA */
|
|
at91_plla_init(CONFIG_SYS_AT91_PLLA);
|
|
|
|
/* PCK = PLLA = 2 * MCK */
|
|
at91_mck_init(CONFIG_SYS_MCKR);
|
|
|
|
/* Switch MCK on PLLA output */
|
|
at91_mck_init(CONFIG_SYS_MCKR_CSS);
|
|
|
|
#if defined(CONFIG_SYS_AT91_PLLB)
|
|
/* Configure PLLB */
|
|
at91_pllb_init(CONFIG_SYS_AT91_PLLB);
|
|
#endif
|
|
|
|
/* Enable External Reset */
|
|
enable_ext_reset();
|
|
|
|
/* Initialize matrix */
|
|
matrix_init();
|
|
|
|
gd->arch.mck_rate_hz = CONFIG_SYS_MASTER_CLOCK;
|
|
/*
|
|
* init timer long enough for using in spl.
|
|
*/
|
|
timer_init();
|
|
|
|
/* enable clocks for all PIOs */
|
|
#if defined(CONFIG_AT91SAM9X5) || defined(CONFIG_AT91SAM9N12)
|
|
at91_periph_clk_enable(ATMEL_ID_PIOAB);
|
|
at91_periph_clk_enable(ATMEL_ID_PIOCD);
|
|
#else
|
|
at91_periph_clk_enable(ATMEL_ID_PIOA);
|
|
at91_periph_clk_enable(ATMEL_ID_PIOB);
|
|
at91_periph_clk_enable(ATMEL_ID_PIOC);
|
|
#endif
|
|
|
|
#if defined(CONFIG_SPL_SERIAL_SUPPORT)
|
|
/* init console */
|
|
at91_seriald_hw_init();
|
|
preloader_console_init();
|
|
#endif
|
|
|
|
mem_init();
|
|
|
|
at91_spl_board_init();
|
|
}
|