linux-arkmicro/u-boot/board/ppcag/bg0900/bg0900.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * PPC-AG BG0900 board
 *
 * Copyright (C) 2013 Marek Vasut <marex@denx.de>
 */

#include <common.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux-mx28.h>
#include <asm/arch/clock.h>
#include <asm/arch/sys_proto.h>
#include <linux/mii.h>
#include <miiphy.h>
#include <netdev.h>
#include <errno.h>

DECLARE_GLOBAL_DATA_PTR;

/*
 * Functions
 */
int board_early_init_f(void)
{
	/* IO0 clock at 480MHz */
	mxs_set_ioclk(MXC_IOCLK0, 480000);
	/* IO1 clock at 480MHz */
	mxs_set_ioclk(MXC_IOCLK1, 480000);

	/* SSP2 clock at 160MHz */
	mxs_set_sspclk(MXC_SSPCLK2, 160000, 0);

	return 0;
}

int dram_init(void)
{
	return mxs_dram_init();
}

int board_init(void)
{
	/* Adress of boot parameters */
	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;

	return 0;
}

#ifdef CONFIG_CMD_NET
int board_eth_init(bd_t *bis)
{
	struct mxs_clkctrl_regs *clkctrl_regs =
		(struct mxs_clkctrl_regs *)MXS_CLKCTRL_BASE;
	struct eth_device *dev;
	int ret;

	ret = cpu_eth_init(bis);

	/* BG0900 uses ENET_CLK PAD to drive FEC clock */
	writel(CLKCTRL_ENET_TIME_SEL_RMII_CLK | CLKCTRL_ENET_CLK_OUT_EN,
	       &clkctrl_regs->hw_clkctrl_enet);

	/* Reset FEC PHYs */
	gpio_direction_output(MX28_PAD_ENET0_RX_CLK__GPIO_4_13, 0);
	udelay(200);
	gpio_set_value(MX28_PAD_ENET0_RX_CLK__GPIO_4_13, 1);

	ret = fecmxc_initialize_multi(bis, 0, 0, MXS_ENET0_BASE);
	if (ret) {
		puts("FEC MXS: Unable to init FEC0\n");
		return ret;
	}

	dev = eth_get_dev_by_name("FEC0");
	if (!dev) {
		puts("FEC MXS: Unable to get FEC0 device entry\n");
		return -EINVAL;
	}

	return ret;
}

#endif