u-boot/arch/arm/mach-uniphier/boot-mode/boot-mode.c

/*
 * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <mmc.h>
#include <spl.h>
#include <linux/errno.h>

#include "../sbc/sbc-regs.h"
#include "../soc-info.h"
#include "boot-device.h"

u32 spl_boot_device_raw(void)
{
	if (boot_is_swapped())
		return BOOT_DEVICE_NOR;

	switch (uniphier_get_soc_id()) {
#if defined(CONFIG_ARCH_UNIPHIER_SLD3)
	case UNIPHIER_SLD3_ID:
		return uniphier_sld3_boot_device();
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD4) || defined(CONFIG_ARCH_UNIPHIER_PRO4) || \
	defined(CONFIG_ARCH_UNIPHIER_SLD8)
	case UNIPHIER_LD4_ID:
	case UNIPHIER_PRO4_ID:
	case UNIPHIER_SLD8_ID:
		return uniphier_ld4_boot_device();
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO5)
	case UNIPHIER_PRO5_ID:
		return uniphier_pro5_boot_device();
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PXS2) || defined(CONFIG_ARCH_UNIPHIER_LD6B)
	case UNIPHIER_PXS2_ID:
	case UNIPHIER_LD6B_ID:
		return uniphier_pxs2_boot_device();
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
	case UNIPHIER_LD11_ID:
	case UNIPHIER_LD20_ID:
		return uniphier_ld20_boot_device();
#endif
	default:
		return BOOT_DEVICE_NONE;
	}
}

u32 spl_boot_device(void)
{
	u32 mode;

	mode = spl_boot_device_raw();

	switch (uniphier_get_soc_id()) {
#if defined(CONFIG_ARCH_UNIPHIER_PXS2) || defined(CONFIG_ARCH_UNIPHIER_LD6B)
	case UNIPHIER_PXS2_ID:
	case UNIPHIER_LD6B_ID:
		if (mode == BOOT_DEVICE_USB)
			mode = BOOT_DEVICE_NOR;
		break;
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD11) || defined(CONFIG_ARCH_UNIPHIER_LD20)
	case UNIPHIER_LD11_ID:
	case UNIPHIER_LD20_ID:
		if (mode == BOOT_DEVICE_MMC1 || mode == BOOT_DEVICE_USB)
			mode = BOOT_DEVICE_BOARD;
		break;
#endif
	default:
		break;
	}

	return mode;
}

u32 spl_boot_mode(const u32 boot_device)
{
	struct mmc *mmc;

	/*
	 * work around a bug in the Boot ROM of PH1-sLD3, LD4, Pro4, and sLD8:
	 *
	 * The boot ROM in these SoCs breaks the PARTITION_CONFIG [179] of
	 * Extended CSD register; when switching to the Boot Partition 1, the
	 * Boot ROM should issue the SWITCH command (CMD6) with Set Bits for
	 * the Access Bits, but in fact it uses Write Byte for the Access Bits.
	 * As a result, the BOOT_PARTITION_ENABLE field of the PARTITION_CONFIG
	 * is lost.  This bug was fixed for PH1-Pro5 and later SoCs.
	 *
	 * Fixup mmc->part_config here because it is used to determine the
	 * partition which the U-Boot image is read from.
	 */
	mmc = find_mmc_device(0);
	mmc->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK);
	mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE;

	return MMCSD_MODE_EMMCBOOT;
}