// SPDX-License-Identifier: GPL-2.0+
#include <asm/io.h>
#include <asm/arch/hardware.h>
#include <asm/arch/j721s2_spl.h>

static u32 __get_backup_bootmedia(u32 main_devstat)
{
	u32 bkup_boot = (main_devstat & MAIN_DEVSTAT_BKUP_BOOTMODE_MASK) >>
		MAIN_DEVSTAT_BKUP_BOOTMODE_SHIFT;

	switch (bkup_boot) {
	case BACKUP_BOOT_DEVICE_USB:
		return BOOT_DEVICE_DFU;
	case BACKUP_BOOT_DEVICE_UART:
		return BOOT_DEVICE_UART;
	case BACKUP_BOOT_DEVICE_ETHERNET:
		return BOOT_DEVICE_ETHERNET;
	case BACKUP_BOOT_DEVICE_MMC2:
	{
		u32 port = (main_devstat & MAIN_DEVSTAT_BKUP_MMC_PORT_MASK) >>
			MAIN_DEVSTAT_BKUP_MMC_PORT_SHIFT;
		if (port == 0x0)
			return BOOT_DEVICE_MMC1;
		return BOOT_DEVICE_MMC2;
	}
	case BACKUP_BOOT_DEVICE_SPI:
		return BOOT_DEVICE_SPI;
	case BACKUP_BOOT_DEVICE_I2C:
		return BOOT_DEVICE_I2C;
	}

	return BOOT_DEVICE_RAM;
}

static u32 __get_primary_bootmedia(u32 main_devstat, u32 wkup_devstat)
{
	u32 bootmode = (wkup_devstat & WKUP_DEVSTAT_PRIMARY_BOOTMODE_MASK) >>
		WKUP_DEVSTAT_PRIMARY_BOOTMODE_SHIFT;

	bootmode |= (main_devstat & MAIN_DEVSTAT_BOOT_MODE_B_MASK) <<
		BOOT_MODE_B_SHIFT;

	if (bootmode == BOOT_DEVICE_OSPI || bootmode == BOOT_DEVICE_QSPI ||
	    bootmode == BOOT_DEVICE_XSPI)
		bootmode = BOOT_DEVICE_SPI;

	if (bootmode == BOOT_DEVICE_MMC2) {
		u32 port = (main_devstat &
			MAIN_DEVSTAT_PRIM_BOOTMODE_MMC_PORT_MASK) >>
			MAIN_DEVSTAT_PRIM_BOOTMODE_PORT_SHIFT;
		if (port == 0x0)
			bootmode = BOOT_DEVICE_MMC1;
	}

	return bootmode;
}

u32 get_boot_device(void)
{
	u32 wkup_devstat = readl(CTRLMMR_WKUP_DEVSTAT);
	u32 main_devstat;
	u32 bootindex = *(u32 *)(CONFIG_SYS_K3_BOOT_PARAM_TABLE_INDEX);

	if (wkup_devstat & WKUP_DEVSTAT_MCU_ONLY_MASK) {
		printf("ERROR: MCU only boot is not yet supported\n");
		return BOOT_DEVICE_RAM;
	}

	/* MAIN CTRL MMR can only be read if MCU ONLY is 0 */
	main_devstat = readl(CTRLMMR_MAIN_DEVSTAT);

	if (bootindex == K3_PRIMARY_BOOTMODE)
		return __get_primary_bootmedia(main_devstat, wkup_devstat);
	else
		return __get_backup_bootmedia(main_devstat);
}