u-boot/board/compulab/imx8mm-cl-iot-gate/spl.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2019 NXP
 * Copyright 2020 Linaro
 */

#include <common.h>
#include <command.h>
#include <cpu_func.h>
#include <hang.h>
#include <image.h>
#include <init.h>
#include <log.h>
#include <spl.h>
#include <asm/io.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/arch/clock.h>
#include <asm/arch/imx8mm_pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <asm/mach-imx/gpio.h>
#include <asm/arch/ddr.h>

#include <dm/uclass.h>
#include <dm/device.h>
#include <dm/uclass-internal.h>
#include <dm/device-internal.h>

#include <power/pmic.h>
#include <power/bd71837.h>

#include "ddr/ddr.h"

DECLARE_GLOBAL_DATA_PTR;

int spl_board_boot_device(enum boot_device boot_dev_spl)
{
	switch (boot_dev_spl) {
	case SD2_BOOT:
	case MMC2_BOOT:
		return BOOT_DEVICE_MMC1;
	case SD3_BOOT:
	case MMC3_BOOT:
		return BOOT_DEVICE_MMC2;
	default:
		return BOOT_DEVICE_NONE;
	}
}

#define I2C_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE | PAD_CTL_PE)
#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
struct i2c_pads_info i2c_pad_info1 = {
	.scl = {
		.i2c_mode = IMX8MM_PAD_I2C2_SCL_I2C2_SCL | PC,
		.gpio_mode = IMX8MM_PAD_I2C2_SCL_GPIO5_IO16 | PC,
		.gp = IMX_GPIO_NR(5, 16),
	},
	.sda = {
		.i2c_mode = IMX8MM_PAD_I2C2_SDA_I2C2_SDA | PC,
		.gpio_mode = IMX8MM_PAD_I2C2_SDA_GPIO5_IO17 | PC,
		.gp = IMX_GPIO_NR(5, 17),
	},
};

static void spl_dram_init(void)
{
	spl_dram_init_compulab();
}

void spl_board_init(void)
{
	puts("Normal Boot\n");
}

#ifdef CONFIG_SPL_LOAD_FIT
int board_fit_config_name_match(const char *name)
{
	/* Just empty function now - can't decide what to choose */
	debug("%s: %s\n", __func__, name);

	return 0;
}
#endif

#define UART_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_FSEL1)
#define WDOG_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_ODE | PAD_CTL_PUE | PAD_CTL_PE)

static iomux_v3_cfg_t const uart_pads[] = {
	IMX8MM_PAD_UART3_RXD_UART3_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
	IMX8MM_PAD_UART3_TXD_UART3_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
};

static iomux_v3_cfg_t const wdog_pads[] = {
	IMX8MM_PAD_GPIO1_IO02_WDOG1_WDOG_B  | MUX_PAD_CTRL(WDOG_PAD_CTRL),
};

int board_early_init_f(void)
{
	struct wdog_regs *wdog = (struct wdog_regs *)WDOG1_BASE_ADDR;

	imx_iomux_v3_setup_multiple_pads(wdog_pads, ARRAY_SIZE(wdog_pads));

	set_wdog_reset(wdog);

	imx_iomux_v3_setup_multiple_pads(uart_pads, ARRAY_SIZE(uart_pads));

	return 0;
}

static int power_init_board(void)
{
	struct udevice *dev;
	int ret;

	ret = pmic_get("pmic@4b", &dev);
	if (ret == -ENODEV) {
		puts("No pmic\n");
		return 0;
	}
	if (ret != 0)
		return ret;

	/* decrease RESET key long push time from the default 10s to 10ms */
	pmic_reg_write(dev, BD718XX_PWRONCONFIG1, 0x0);

	/* unlock the PMIC regs */
	pmic_reg_write(dev, BD718XX_REGLOCK, 0x1);

	/* increase VDD_SOC to typical value 0.85v before first DRAM access */
	pmic_reg_write(dev, BD718XX_BUCK1_VOLT_RUN, 0x0f);

	/* increase VDD_DRAM to 0.975v for 3Ghz DDR */
	pmic_reg_write(dev, BD718XX_1ST_NODVS_BUCK_VOLT, 0x83);

	/* increase NVCC_DRAM_1V2 to 1.2v for DDR4 */
	pmic_reg_write(dev, BD718XX_4TH_NODVS_BUCK_VOLT, 0x28);

	/* lock the PMIC regs */
	pmic_reg_write(dev, BD718XX_REGLOCK, 0x11);

	return 0;
}

void board_init_f(ulong dummy)
{
	struct udevice *dev;
	int ret;

	arch_cpu_init();

	board_early_init_f();

	init_uart_clk(2);

	timer_init();

	preloader_console_init();

	/* Clear the BSS. */
	memset(__bss_start, 0, __bss_end - __bss_start);

	ret = spl_early_init();
	if (ret) {
		debug("spl_early_init() failed: %d\n", ret);
		hang();
	}

	ret = uclass_get_device_by_name(UCLASS_CLK,
					"clock-controller@30380000",
					&dev);
	if (ret < 0) {
		printf("Failed to find clock node. Check device tree\n");
		hang();
	}

	enable_tzc380();

	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);

	power_init_board();

	/* DDR initialization */
	spl_dram_init();

	board_init_r(NULL, 0);
}