u-boot/board/renesas/draak/draak.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * board/renesas/draak/draak.c
 *     This file is Draak board support.
 *
 * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
 */

#include <common.h>
#include <cpu_func.h>
#include <hang.h>
#include <init.h>
#include <malloc.h>
#include <netdev.h>
#include <dm.h>
#include <asm/global_data.h>
#include <dm/platform_data/serial_sh.h>
#include <asm/processor.h>
#include <asm/mach-types.h>
#include <asm/io.h>
#include <linux/bitops.h>
#include <linux/errno.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/arch/gpio.h>
#include <asm/arch/rmobile.h>
#include <asm/arch/rcar-mstp.h>
#include <asm/arch/sh_sdhi.h>
#include <i2c.h>
#include <mmc.h>

DECLARE_GLOBAL_DATA_PTR;

#define GSX_MSTP112		BIT(12)	/* 3DG */
#define SCIF2_MSTP310		BIT(10)	/* SCIF2 */
#define DVFS_MSTP926		BIT(26)
#define HSUSB_MSTP704		BIT(4)	/* HSUSB */

int board_early_init_f(void)
{
#if CONFIG_IS_ENABLED(SYS_I2C_LEGACY) && defined(CONFIG_SYS_I2C_SH)
	/* DVFS for reset */
	mstp_clrbits_le32(SMSTPCR9, SMSTPCR9, DVFS_MSTP926);
#endif
	return 0;
}

/* HSUSB block registers */
#define HSUSB_REG_LPSTS			0xE6590102
#define HSUSB_REG_LPSTS_SUSPM_NORMAL	BIT(14)
#define HSUSB_REG_UGCTRL2		0xE6590184
#define HSUSB_REG_UGCTRL2_USB0SEL	0x30
#define HSUSB_REG_UGCTRL2_USB0SEL_EHCI	0x10

int board_init(void)
{
	/* USB1 pull-up */
	setbits_le32(PFC_PUEN6, PUEN_USB1_OVC | PUEN_USB1_PWEN);

	/* Configure the HSUSB block */
	mstp_clrbits_le32(SMSTPCR7, SMSTPCR7, HSUSB_MSTP704);
	/* Choice USB0SEL */
	clrsetbits_le32(HSUSB_REG_UGCTRL2, HSUSB_REG_UGCTRL2_USB0SEL,
			HSUSB_REG_UGCTRL2_USB0SEL_EHCI);
	/* low power status */
	setbits_le16(HSUSB_REG_LPSTS, HSUSB_REG_LPSTS_SUSPM_NORMAL);

	return 0;
}

#define RST_BASE	0xE6160000
#define RST_CA53RESCNT	(RST_BASE + 0x44)
#define RST_CA53_CODE	0x5A5A000F

void reset_cpu(void)
{
	writel(RST_CA53_CODE, RST_CA53RESCNT);
}