u-boot-brain/arch/arm/mach-rockchip/rk3399-board-spl.c

/*
 * (C) Copyright 2016 Rockchip Electronics Co., Ltd
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/grf_rk3399.h>
#include <asm/arch/hardware.h>
#include <asm/arch/periph.h>
#include <asm/io.h>
#include <debug_uart.h>
#include <dm.h>
#include <dm/pinctrl.h>
#include <ram.h>
#include <spl.h>
#include <syscon.h>

DECLARE_GLOBAL_DATA_PTR;

u32 spl_boot_device(void)
{
	return BOOT_DEVICE_MMC1;
}

u32 spl_boot_mode(const u32 boot_device)
{
	return MMCSD_MODE_RAW;
}

#define TIMER_CHN10_BASE	0xff8680a0
#define TIMER_END_COUNT_L	0x00
#define TIMER_END_COUNT_H	0x04
#define TIMER_INIT_COUNT_L	0x10
#define TIMER_INIT_COUNT_H	0x14
#define TIMER_CONTROL_REG	0x1c

#define TIMER_EN	0x1
#define	TIMER_FMODE	(0 << 1)
#define	TIMER_RMODE	(1 << 1)

void secure_timer_init(void)
{
	writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_L);
	writel(0xffffffff, TIMER_CHN10_BASE + TIMER_END_COUNT_H);
	writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_L);
	writel(0, TIMER_CHN10_BASE + TIMER_INIT_COUNT_H);
	writel(TIMER_EN | TIMER_FMODE, TIMER_CHN10_BASE + TIMER_CONTROL_REG);
}

void board_debug_uart_init(void)
{
#define GRF_BASE	0xff770000
	struct rk3399_grf_regs * const grf = (void *)GRF_BASE;

#if defined(CONFIG_DEBUG_UART_BASE) && (CONFIG_DEBUG_UART_BASE == 0xff180000)
	/* Enable early UART0 on the RK3399 */
	rk_clrsetreg(&grf->gpio2c_iomux,
		     GRF_GPIO2C0_SEL_MASK,
		     GRF_UART0BT_SIN << GRF_GPIO2C0_SEL_SHIFT);
	rk_clrsetreg(&grf->gpio2c_iomux,
		     GRF_GPIO2C1_SEL_MASK,
		     GRF_UART0BT_SOUT << GRF_GPIO2C1_SEL_SHIFT);
#else
	/* Enable early UART2 channel C on the RK3399 */
	rk_clrsetreg(&grf->gpio4c_iomux,
		     GRF_GPIO4C3_SEL_MASK,
		     GRF_UART2DGBC_SIN << GRF_GPIO4C3_SEL_SHIFT);
	rk_clrsetreg(&grf->gpio4c_iomux,
		     GRF_GPIO4C4_SEL_MASK,
		     GRF_UART2DBGC_SOUT << GRF_GPIO4C4_SEL_SHIFT);
	/* Set channel C as UART2 input */
	rk_clrsetreg(&grf->soc_con7,
		     GRF_UART_DBG_SEL_MASK,
		     GRF_UART_DBG_SEL_C << GRF_UART_DBG_SEL_SHIFT);
#endif
}

void board_init_f(ulong dummy)
{
	struct udevice *pinctrl;
	struct udevice *dev;
	struct rk3399_pmusgrf_regs *sgrf;
	struct rk3399_grf_regs *grf;
	int ret;

#define EARLY_UART
#ifdef EARLY_UART
	/*
	 * Debug UART can be used from here if required:
	 *
	 * debug_uart_init();
	 * printch('a');
	 * printhex8(0x1234);
	 * printascii("string");
	 */
	debug_uart_init();
	printascii("U-Boot SPL board init");
#endif

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

	/*
	 * Disable DDR and SRAM security regions.
	 *
	 * As we are entered from the BootROM, the region from
	 * 0x0 through 0xfffff (i.e. the first MB of memory) will
	 * be protected. This will cause issues with the DW_MMC
	 * driver, which tries to DMA from/to the stack (likely)
	 * located in this range.
	 */
	sgrf = syscon_get_first_range(ROCKCHIP_SYSCON_PMUSGRF);
	rk_clrsetreg(&sgrf->ddr_rgn_con[16], 0x1ff, 0);
	rk_clrreg(&sgrf->slv_secure_con4, 0x2000);

	/*  eMMC clock generator: disable the clock multipilier */
	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
	rk_clrreg(&grf->emmccore_con[11], 0x0ff);

	secure_timer_init();

	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
	if (ret) {
		debug("Pinctrl 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 spl_board_init(void)
{
	struct udevice *pinctrl;
	int ret;

	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
	if (ret) {
		debug("%s: Cannot find pinctrl device\n", __func__);
		goto err;
	}

	/* Enable debug UART */
	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
	if (ret) {
		debug("%s: Failed to set up console UART\n", __func__);
		goto err;
	}

	preloader_console_init();
#if CONFIG_IS_ENABLED(ROCKCHIP_BACK_TO_BROM)
	back_to_bootrom();
#endif

	return;
err:
	printf("spl_board_init: Error %d\n", ret);

	/* No way to report error here */
	hang();
}

#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
	/* Just empty function now - can't decide what to choose */
	debug("%s: %s\n", __func__, name);

	return 0;
}
#endif