path: root/board/toradex/verdin-imx8mp/spl.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2020 Toradex
 */

#include <common.h>
#include <asm/arch/clock.h>
#include <asm/arch/ddr.h>
#include <asm/arch/imx8mp_pins.h>
#include <asm/arch/sys_proto.h>
#include <asm/io.h>
#include <asm/mach-imx/boot_mode.h>
#include <asm/mach-imx/gpio.h>
#include <asm/mach-imx/iomux-v3.h>
#include <asm/mach-imx/mxc_i2c.h>
#include <cpu_func.h>
#include <errno.h>
#include <fsl_esdhc_imx.h>
#include <hang.h>
#include <mmc.h>
#include <power/pca9450.h>
#include <power/pmic.h>
#include <spl.h>

extern struct dram_timing_info dram_timing2;

DECLARE_GLOBAL_DATA_PTR;

int spl_board_boot_device(enum boot_device boot_dev_spl)
{
#ifdef CONFIG_SPL_BOOTROM_SUPPORT
	return BOOT_DEVICE_BOOTROM;
#else
	switch (boot_dev_spl) {
	case SD1_BOOT:
	case MMC1_BOOT:
	case SD2_BOOT:
	case MMC2_BOOT:
		return BOOT_DEVICE_MMC1;
	case SD3_BOOT:
	case MMC3_BOOT:
		return BOOT_DEVICE_MMC2;
	case QSPI_BOOT:
		return BOOT_DEVICE_NOR;
	case NAND_BOOT:
		return BOOT_DEVICE_NAND;
	case USB_BOOT:
		return BOOT_DEVICE_BOARD;
	default:
		return BOOT_DEVICE_NONE;
	}
#endif
}

void spl_dram_init(void)
{
	/*
	 * Try configuring for dual rank memory falling back to single rank
	 */
	if (ddr_init(&dram_timing)) {
		printf("Dual rank failed, attempting single rank configuration.\n");
		ddr_init(&dram_timing2);
	}
}

#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 = MX8MP_PAD_I2C1_SCL__I2C1_SCL | PC,
		.gpio_mode = MX8MP_PAD_I2C1_SCL__GPIO5_IO14 | PC,
		.gp = IMX_GPIO_NR(5, 14),
	},
	.sda = {
		.i2c_mode = MX8MP_PAD_I2C1_SDA__I2C1_SDA | PC,
		.gpio_mode = MX8MP_PAD_I2C1_SDA__GPIO5_IO15 | PC,
		.gp = IMX_GPIO_NR(5, 15),
	},
};

#define USDHC2_CD_GPIO	IMX_GPIO_NR(2, 12)

#define USDHC_PAD_CTRL	(PAD_CTL_DSE6 | PAD_CTL_HYS | PAD_CTL_PUE |PAD_CTL_PE | \
			 PAD_CTL_FSEL2)
#define USDHC_GPIO_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_DSE1)
#define USDHC_CD_PAD_CTRL (PAD_CTL_PE |PAD_CTL_PUE |PAD_CTL_HYS | PAD_CTL_DSE4)

static iomux_v3_cfg_t const usdhc2_pads[] = {
	MX8MP_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_SD2_DATA0__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_SD2_DATA1__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_SD2_DATA2__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_SD2_DATA3__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_SD2_CD_B__GPIO2_IO12    | MUX_PAD_CTRL(USDHC_CD_PAD_CTRL),
};

static iomux_v3_cfg_t const usdhc3_pads[] = {
	MX8MP_PAD_NAND_WE_B__USDHC3_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_WP_B__USDHC3_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_DATA04__USDHC3_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_DATA05__USDHC3_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_DATA06__USDHC3_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_DATA07__USDHC3_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_RE_B__USDHC3_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_CE2_B__USDHC3_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_CE3_B__USDHC3_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
	MX8MP_PAD_NAND_CLE__USDHC3_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
};

static struct fsl_esdhc_cfg usdhc_cfg[2] = {
	/* esdhc_base, sdhc_clk, max_bus_width */
	{USDHC2_BASE_ADDR, 0, 4},
	{USDHC3_BASE_ADDR, 0, 8},
};

int board_mmc_init(bd_t *bis)
{
	int i, ret;
	/*
	 * According to the board_mmc_init() the following map is done:
	 * (U-Boot device node)    (Physical Port)
	 * mmc0                    USDHC2 (SD card)
	 * mmc1                    USDHC3 (eMMC)
	 */
	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
		switch (i) {
		case 0:
			init_clk_usdhc(1);
			usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
			imx_iomux_v3_setup_multiple_pads(
				usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
			gpio_request(USDHC2_CD_GPIO, "SD_1_CD#");
			gpio_direction_input(USDHC2_CD_GPIO);
			break;
		case 1:
			init_clk_usdhc(2);
			usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
			imx_iomux_v3_setup_multiple_pads(
				usdhc3_pads, ARRAY_SIZE(usdhc3_pads));
			break;
		default:
			printf("Warning: you configured more USDHC controllers"
				"(%d) than supported by the board\n", i + 1);
			return -EINVAL;
		}

		ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
		if (ret)
			return ret;
	}

	return 0;
}

int board_mmc_getcd(struct mmc *mmc)
{
	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
	int ret = 0;

	switch (cfg->esdhc_base) {
	case USDHC3_BASE_ADDR:
		ret = 1; /* eMMC */
		break;
	case USDHC2_BASE_ADDR:
		ret = !gpio_get_value(USDHC2_CD_GPIO);
		return ret;
	}

	return 1;
}

#ifdef CONFIG_POWER
#define I2C_PMIC	0
int power_init_board(void)
{
	struct pmic *p;
	int ret;

	ret = power_pca9450b_init(I2C_PMIC);
	if (ret)
		printf("power init failed\n");
	p = pmic_get("PCA9450");
	pmic_probe(p);

	/* BUCKxOUT_DVS0/1 control BUCK123 output */
	pmic_reg_write(p, PCA9450_BUCK123_DVS, 0x29);

	/*
	 * increase VDD_SOC to typical value 0.95V before first
	 * DRAM access, set DVS1 to 0.85v for suspend.
	 * Enable DVS control through PMIC_STBY_REQ and
	 * set B1_ENMODE=1 (ON by PMIC_ON_REQ=H)
	 */
	pmic_reg_write(p, PCA9450_BUCK1OUT_DVS0, 0x1c);
	pmic_reg_write(p, PCA9450_BUCK1OUT_DVS1, 0x14);
	pmic_reg_write(p, PCA9450_BUCK1CTRL, 0x59);

	/* Kernel uses OD/OD freq for SoC */
	/* To avoid timing risk from SoC to ARM, increase VDD_ARM to OD voltage 0.95v */
	pmic_reg_write(p, PCA9450_BUCK2OUT_DVS0, 0x1c);

	/* set WDOG_B_CFG to cold reset */
	pmic_reg_write(p, PCA9450_RESET_CTRL, 0xA1);

	/* set LDO4 and CONFIG2 to enable the I2C level translator */
	pmic_reg_write(p, PCA9450_LDO4CTRL, 0x59);
	pmic_reg_write(p, PCA9450_CONFIG2, 0x1);

	return 0;
}
#endif

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

void board_init_f(ulong dummy)
{
	int ret;

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

	arch_cpu_init();

	board_early_init_f();

	timer_init();

	preloader_console_init();

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

	enable_tzc380();

	/* Adjust PMIC voltage to 1.0V for 800 MHz */
	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);

	/* PMIC initialization */
	power_init_board();

	/* DDR initialization */
	spl_dram_init();

	board_init_r(NULL, 0);
}

int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	puts("resetting ...\n");

	reset_cpu(WDOG1_BASE_ADDR);

	return 0;
}