| // SPDX-License-Identifier: GPL-2.0+ |
| * Copyright (C) 2016 Socionext Inc. |
| * Author: Masahiro Yamada <yamada.masahiro@socionext.com> |
| u32 spl_mmc_boot_mode(struct mmc *mmc, const u32 boot_device) |
| * work around a bug in the Boot ROM of 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->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK); |
| mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE; |
| return MMCSD_MODE_EMMCBOOT; |