u-boot/arch/arm/mach-socfpga/spl_gen5.c

// SPDX-License-Identifier: GPL-2.0+
/*
 *  Copyright (C) 2012 Altera Corporation <www.altera.com>
 */

#include <common.h>
#include <asm/io.h>
#include <asm/u-boot.h>
#include <asm/utils.h>
#include <image.h>
#include <asm/arch/reset_manager.h>
#include <spl.h>
#include <asm/arch/system_manager.h>
#include <asm/arch/freeze_controller.h>
#include <asm/arch/clock_manager.h>
#include <asm/arch/misc.h>
#include <asm/arch/scan_manager.h>
#include <asm/arch/sdram.h>
#include <asm/sections.h>
#include <debug_uart.h>
#include <fdtdec.h>
#include <watchdog.h>

DECLARE_GLOBAL_DATA_PTR;

static const struct socfpga_system_manager *sysmgr_regs =
	(struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;

u32 spl_boot_device(void)
{
	const u32 bsel = readl(&sysmgr_regs->bootinfo);

	switch (SYSMGR_GET_BOOTINFO_BSEL(bsel)) {
	case 0x1:	/* FPGA (HPS2FPGA Bridge) */
		return BOOT_DEVICE_RAM;
	case 0x2:	/* NAND Flash (1.8V) */
	case 0x3:	/* NAND Flash (3.0V) */
		socfpga_per_reset(SOCFPGA_RESET(NAND), 0);
		return BOOT_DEVICE_NAND;
	case 0x4:	/* SD/MMC External Transceiver (1.8V) */
	case 0x5:	/* SD/MMC Internal Transceiver (3.0V) */
		socfpga_per_reset(SOCFPGA_RESET(SDMMC), 0);
		socfpga_per_reset(SOCFPGA_RESET(DMA), 0);
		return BOOT_DEVICE_MMC1;
	case 0x6:	/* QSPI Flash (1.8V) */
	case 0x7:	/* QSPI Flash (3.0V) */
		socfpga_per_reset(SOCFPGA_RESET(QSPI), 0);
		return BOOT_DEVICE_SPI;
	default:
		printf("Invalid boot device (bsel=%08x)!\n", bsel);
		hang();
	}
}

#ifdef CONFIG_SPL_MMC_SUPPORT
u32 spl_boot_mode(const u32 boot_device)
{
#if defined(CONFIG_SPL_FAT_SUPPORT) || defined(CONFIG_SPL_EXT_SUPPORT)
	return MMCSD_MODE_FS;
#else
	return MMCSD_MODE_RAW;
#endif
}
#endif

void board_init_f(ulong dummy)
{
	const struct cm_config *cm_default_cfg = cm_get_default_config();
	unsigned long sdram_size;
	unsigned long reg;
	int ret;

	/*
	 * First C code to run. Clear fake OCRAM ECC first as SBE
	 * and DBE might triggered during power on
	 */
	reg = readl(&sysmgr_regs->eccgrp_ocram);
	if (reg & SYSMGR_ECC_OCRAM_SERR)
		writel(SYSMGR_ECC_OCRAM_SERR | SYSMGR_ECC_OCRAM_EN,
		       &sysmgr_regs->eccgrp_ocram);
	if (reg & SYSMGR_ECC_OCRAM_DERR)
		writel(SYSMGR_ECC_OCRAM_DERR  | SYSMGR_ECC_OCRAM_EN,
		       &sysmgr_regs->eccgrp_ocram);

	memset(__bss_start, 0, __bss_end - __bss_start);

	socfpga_sdram_remap_zero();

	debug("Freezing all I/O banks\n");
	/* freeze all IO banks */
	sys_mgr_frzctrl_freeze_req();

	/* Put everything into reset but L4WD0. */
	socfpga_per_reset_all();
	/* Put FPGA bridges into reset too. */
	socfpga_bridges_reset(1);

	socfpga_per_reset(SOCFPGA_RESET(SDR), 0);
	socfpga_per_reset(SOCFPGA_RESET(UART0), 0);
	socfpga_per_reset(SOCFPGA_RESET(OSC1TIMER0), 0);

	timer_init();

	debug("Reconfigure Clock Manager\n");
	/* reconfigure the PLLs */
	if (cm_basic_init(cm_default_cfg))
		hang();

	/* Enable bootrom to configure IOs. */
	sysmgr_config_warmrstcfgio(1);

	/* configure the IOCSR / IO buffer settings */
	if (scan_mgr_configure_iocsr())
		hang();

	sysmgr_config_warmrstcfgio(0);

	/* configure the pin muxing through system manager */
	sysmgr_config_warmrstcfgio(1);
	sysmgr_pinmux_init();
	sysmgr_config_warmrstcfgio(0);

	/* De-assert reset for peripherals and bridges based on handoff */
	reset_deassert_peripherals_handoff();
	socfpga_bridges_reset(0);

	debug("Unfreezing/Thaw all I/O banks\n");
	/* unfreeze / thaw all IO banks */
	sys_mgr_frzctrl_thaw_req();

#ifdef CONFIG_DEBUG_UART
	socfpga_per_reset(SOCFPGA_RESET(UART0), 0);
	debug_uart_init();
#endif

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

	/* enable console uart printing */
	preloader_console_init();

	if (sdram_mmr_init_full(0xffffffff) != 0) {
		puts("SDRAM init failed.\n");
		hang();
	}

	debug("SDRAM: Calibrating PHY\n");
	/* SDRAM calibration */
	if (sdram_calibration_full() == 0) {
		puts("SDRAM calibration failed.\n");
		hang();
	}

	sdram_size = sdram_calculate_size();
	debug("SDRAM: %ld MiB\n", sdram_size >> 20);

	/* Sanity check ensure correct SDRAM size specified */
	if (get_ram_size(0, sdram_size) != sdram_size) {
		puts("SDRAM size check failed!\n");
		hang();
	}

	socfpga_bridges_reset(1);
}