u-boot/board/somlabs/visionsom-6ull/visionsom-6ull.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2017-2019 A. Karas, SomLabs
 * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
 */

#include <init.h>
#include <asm/arch/clock.h>
#include <asm/arch/crm_regs.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/gpio.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <asm/io.h>
#include <common.h>
#include <env.h>
#include <fsl_esdhc_imx.h>
#include <i2c.h>
#include <miiphy.h>
#include <linux/sizes.h>
#include <mmc.h>
#include <netdev.h>

DECLARE_GLOBAL_DATA_PTR;

#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)

int dram_init(void)
{
	gd->ram_size = imx_ddr_size();

	return 0;
}

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 void setup_iomux_uart(void)
{
	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_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)
{
	phy_write(phydev, MDIO_DEVAD_NONE, 0x1f, 0x8190);

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

	return 0;
}
#endif

int board_mmc_get_env_dev(int devno)
{
	return devno;
}

int mmc_map_to_kernel_blk(int devno)
{
	return devno;
}

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_SYS_I2C
	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
#endif

#ifdef CONFIG_FEC_MXC
	setup_fec();
#endif

	return 0;
}

#ifdef CONFIG_CMD_BMODE
static const struct boot_mode board_boot_modes[] = {
	/* 4 bit bus width */
	{"sd1", MAKE_CFGVAL(0x42, 0x20, 0x00, 0x00)},
	{"sd2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
	{NULL,	 0},
};
#endif

int board_late_init(void)
{
#ifdef CONFIG_CMD_BMODE
	add_board_boot_modes(board_boot_modes);
#endif

	if (is_cpu_type(MXC_CPU_MX6ULL))
		env_set("board", "visionsom-6ull");
	else
		env_set("board", "visionsom-6ul");

	return 0;
}

int checkboard(void)
{
	printf("Board: SoMLabs VisionSOM-6UL%s\n",
	       is_cpu_type(MXC_CPU_MX6ULL) ? "L" : "");

	return 0;
}