u-boot/board/myir/mys_6ulx/mys_6ulx.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2020 Linumiz
 * Author: Parthiban Nallathambi <parthiban@linumiz.com>
 */

#include <init.h>
#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/global_data.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <fsl_esdhc_imx.h>
#include <linux/bitops.h>
#include <miiphy.h>
#include <netdev.h>
#include <usb.h>
#include <usb/ehci-ci.h>

DECLARE_GLOBAL_DATA_PTR;

int dram_init(void)
{
	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);

	return 0;
}

#define UART_PAD_CTRL  (PAD_CTL_PKE         | PAD_CTL_PUE       | \
			PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \
			PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | \
			PAD_CTL_HYS)

static iomux_v3_cfg_t const uart1_pads[] = {
	MX6_PAD_UART1_TX_DATA__UART1_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_UART1_RX_DATA__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
};

static iomux_v3_cfg_t const uart5_pads[] = {
	MX6_PAD_UART5_TX_DATA__UART5_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_UART5_RX_DATA__UART5_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_GPIO1_IO09__UART5_DCE_CTS | MUX_PAD_CTRL(UART_PAD_CTRL),
	MX6_PAD_GPIO1_IO08__UART5_DCE_RTS | MUX_PAD_CTRL(UART_PAD_CTRL),
};

static void setup_iomux_uart(void)
{
	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
	imx_iomux_v3_setup_multiple_pads(uart5_pads, ARRAY_SIZE(uart5_pads));
}

#ifdef CONFIG_FEC_MXC

static int setup_fec(void)
{
	struct iomuxc *const iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
	int ret;

	/*
	 * Use 50M anatop loopback REF_CLK1 for ENET1,
	 * clear gpr1[13], set gpr1[17].
	 */
	clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC1_MASK,
			IOMUX_GPR1_FEC1_CLOCK_MUX1_SEL_MASK);

	ret = enable_fec_anatop_clock(0, ENET_50MHZ);
	if (ret)
		return ret;

	enable_enet_clk(1);

	return 0;
}

int board_phy_config(struct phy_device *phydev)
{
	/*
	 * Defaults + Enable status LEDs (LED1: Activity, LED0: Link) & select
	 * 50 MHz RMII clock mode.
	 */
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1f, 0x8190);

	if (phydev->drv->config)
		phydev->drv->config(phydev);

	return 0;
}
#endif /* CONFIG_FEC_MXC */

int board_early_init_f(void)
{
	setup_iomux_uart();

	return 0;
}

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

#ifdef CONFIG_FEC_MXC
	setup_fec();
#endif
	return 0;
}

int checkboard(void)
{
	u32 cpurev = get_cpu_rev();

	printf("Board: MYiR MYS-6ULX %s Single Board Computer\n",
	       get_imx_type((cpurev & 0xFF000) >> 12));

	return 0;
}