linux-arkmicro/u-boot/board/alphaproject/ap_sh4a_4a/ap_sh4a_4a.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2012 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
 * Copyright (C) 2012 Renesas Solutions Corp.
 */

#include <common.h>
#include <asm/io.h>
#include <asm/processor.h>
#include <netdev.h>
#include <i2c.h>

#define MODEMR			(0xFFCC0020)
#define MODEMR_MASK		(0x6)
#define MODEMR_533MHZ	(0x2)

int checkboard(void)
{
	u32 r = readl(MODEMR);
	if ((r & MODEMR_MASK) & MODEMR_533MHZ)
		puts("CPU Clock: 533MHz\n");
	else
		puts("CPU Clock: 400MHz\n");

	puts("BOARD: Alpha Project. AP-SH4A-4A\n");
	return 0;
}

#define MSTPSR1			(0xFFC80044)
#define MSTPCR1			(0xFFC80034)
#define MSTPSR1_GETHER	(1 << 14)

/* IPSR3 */
#define ET0_ETXD0 (0x4 << 3)
#define ET0_GTX_CLK_A (0x4 << 6)
#define ET0_ETXD1_A (0x4 << 9)
#define ET0_ETXD2_A (0x4 << 12)
#define ET0_ETXD3_A (0x4 << 15)
#define ET0_ETXD4 (0x3 << 18)
#define ET0_ETXD5_A (0x5 << 21)
#define ET0_ETXD6_A (0x5 << 24)
#define ET0_ETXD7 (0x4 << 27)
#define IPSR3_ETH_ENABLE \
	(ET0_ETXD0 | ET0_GTX_CLK_A | ET0_ETXD1_A | ET0_ETXD2_A | \
	ET0_ETXD3_A | ET0_ETXD4 | ET0_ETXD5_A | ET0_ETXD6_A | ET0_ETXD7)

/* IPSR4 */
#define ET0_ERXD7	(0x4)
#define ET0_RX_DV	(0x4 << 3)
#define ET0_RX_ER	(0x4 << 6)
#define ET0_CRS		(0x4 << 9)
#define ET0_COL		(0x4 << 12)
#define ET0_MDC		(0x4 << 15)
#define ET0_MDIO_A	(0x3 << 18)
#define ET0_LINK_A	(0x3 << 20)
#define ET0_PHY_INT_A (0x3 << 24)

#define IPSR4_ETH_ENABLE \
	(ET0_ERXD7 | ET0_RX_DV | ET0_RX_ER | ET0_CRS | ET0_COL | \
	ET0_MDC | ET0_MDIO_A | ET0_LINK_A | ET0_PHY_INT_A)

/* IPSR8 */
#define ET0_ERXD0	(0x4 << 20)
#define ET0_ERXD1	(0x4 << 23)
#define ET0_ERXD2_A (0x3 << 26)
#define ET0_ERXD3_A (0x3 << 28)
#define IPSR8_ETH_ENABLE \
	(ET0_ERXD0 | ET0_ERXD1 | ET0_ERXD2_A | ET0_ERXD3_A)

/* IPSR10 */
#define RX4_D	(0x1 << 22)
#define TX4_D	(0x1 << 23)
#define IPSR10_SCIF_ENABLE (RX4_D | TX4_D)

/* IPSR11 */
#define ET0_ERXD4	(0x4 <<  4)
#define ET0_ERXD5	(0x4 <<  7)
#define ET0_ERXD6	(0x3 << 10)
#define ET0_TX_EN	(0x2 << 19)
#define ET0_TX_ER	(0x2 << 21)
#define ET0_TX_CLK_A (0x4 << 23)
#define ET0_RX_CLK_A (0x3 << 26)
#define IPSR11_ETH_ENABLE \
	(ET0_ERXD4 | ET0_ERXD5 | ET0_ERXD6 | ET0_TX_EN | ET0_TX_ER | \
	ET0_TX_CLK_A | ET0_RX_CLK_A)

#define GPSR1_INIT (0xFFFF7FFF)
#define GPSR2_INIT (0x4005FEFF)
#define GPSR3_INIT (0x2EFFFFFF)
#define GPSR4_INIT (0xC7000000)

int board_init(void)
{
	u32 data;

	/* Set IPSR register */
	data = readl(IPSR3);
	data |= IPSR3_ETH_ENABLE;
	writel(~data, PMMR);
	writel(data, IPSR3);

	data = readl(IPSR4);
	data |= IPSR4_ETH_ENABLE;
	writel(~data, PMMR);
	writel(data, IPSR4);

	data = readl(IPSR8);
	data |= IPSR8_ETH_ENABLE;
	writel(~data, PMMR);
	writel(data, IPSR8);

	data = readl(IPSR10);
	data |= IPSR10_SCIF_ENABLE;
	writel(~data, PMMR);
	writel(data, IPSR10);

	data = readl(IPSR11);
	data |= IPSR11_ETH_ENABLE;
	writel(~data, PMMR);
	writel(data, IPSR11);

	/* GPIO select */
	data = GPSR1_INIT;
	writel(~data, PMMR);
	writel(data, GPSR1);

	data = GPSR2_INIT;
	writel(~data, PMMR);
	writel(data, GPSR2);

	data = GPSR3_INIT;
	writel(~data, PMMR);
	writel(data, GPSR3);

	data = GPSR4_INIT;
	writel(~data, PMMR);
	writel(data, GPSR4);

	data = 0x0;
	writel(~data, PMMR);
	writel(data, GPSR5);

	/* mode select */
	data = MODESEL2_INIT;
	writel(~data, PMMR);
	writel(data, MODESEL2);

#if defined(CONFIG_SH_ETHER)
	u32 r = readl(MSTPSR1);
	if (r & MSTPSR1_GETHER)
		writel((r & ~MSTPSR1_GETHER), MSTPCR1);
#endif
	return 0;
}

int board_late_init(void)
{
	printf("Cannot use I2C to get MAC address\n");

	return 0;
}