2 * Copyright (C) 2016 Socionext Inc.
3 * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
5 * SPDX-License-Identifier: GPL-2.0+
12 u32 spl_boot_mode(const u32 boot_device)
17 * work around a bug in the Boot ROM of PH1-sLD3, LD4, Pro4, and sLD8:
19 * The boot ROM in these SoCs breaks the PARTITION_CONFIG [179] of
20 * Extended CSD register; when switching to the Boot Partition 1, the
21 * Boot ROM should issue the SWITCH command (CMD6) with Set Bits for
22 * the Access Bits, but in fact it uses Write Byte for the Access Bits.
23 * As a result, the BOOT_PARTITION_ENABLE field of the PARTITION_CONFIG
24 * is lost. This bug was fixed for PH1-Pro5 and later SoCs.
26 * Fixup mmc->part_config here because it is used to determine the
27 * partition which the U-Boot image is read from.
29 mmc = find_mmc_device(0);
30 mmc->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK);
31 mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE;
33 return MMCSD_MODE_EMMCBOOT;