u-boot/arch/arm/mach-rockchip/rk3288-board-tpl.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2017 Amarula Solutions
 */

#include <common.h>
#include <debug_uart.h>
#include <dm.h>
#include <ram.h>
#include <spl.h>
#include <version.h>
#include <asm/io.h>
#include <asm/arch/bootrom.h>
#include <asm/arch/clock.h>
#include <asm/arch/grf_rk3288.h>
#include <asm/arch/periph.h>
#include <asm/arch/pmu_rk3288.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/timer.h>

#define GRF_BASE		0xff770000
void board_init_f(ulong dummy)
{
	struct udevice *dev;
	int ret;

	/* Example code showing how to enable the debug UART on RK3288 */
	/* Enable early UART on the RK3288 */
	struct rk3288_grf * const grf = (void *)GRF_BASE;

	rk_clrsetreg(&grf->gpio7ch_iomux, GPIO7C7_MASK << GPIO7C7_SHIFT |
		     GPIO7C6_MASK << GPIO7C6_SHIFT,
		     GPIO7C7_UART2DBG_SOUT << GPIO7C7_SHIFT |
		     GPIO7C6_UART2DBG_SIN << GPIO7C6_SHIFT);
	/*
	 * Debug UART can be used from here if required:
	 *
	 * debug_uart_init();
	 * printch('a');
	 * printhex8(0x1234);
	 * printascii("string");
	 */
	debug_uart_init();

	ret = spl_early_init();
	if (ret) {
		debug("spl_early_init() failed: %d\n", ret);
		hang();
	}

	rockchip_timer_init();
	configure_l2ctlr();

	ret = rockchip_get_clk(&dev);
	if (ret) {
		debug("CLK init failed: %d\n", ret);
		return;
	}

	ret = uclass_get_device(UCLASS_RAM, 0, &dev);
	if (ret) {
		debug("DRAM init failed: %d\n", ret);
		return;
	}
}

void board_return_to_bootrom(void)
{
	back_to_bootrom(BROM_BOOT_NEXTSTAGE);
}

u32 spl_boot_device(void)
{
	return BOOT_DEVICE_BOOTROM;
}

void spl_board_init(void)
{
	puts("\nU-Boot TPL " PLAIN_VERSION " (" U_BOOT_DATE " - " \
				U_BOOT_TIME ")\n");
}