1*81c847bfSMasahiro Yamada /* 2*81c847bfSMasahiro Yamada * Copyright (C) 2016 Socionext Inc. 3*81c847bfSMasahiro Yamada * Author: Masahiro Yamada <yamada.masahiro@socionext.com> 4*81c847bfSMasahiro Yamada * 5*81c847bfSMasahiro Yamada * SPDX-License-Identifier: GPL-2.0+ 6*81c847bfSMasahiro Yamada */ 7*81c847bfSMasahiro Yamada 8*81c847bfSMasahiro Yamada #include <common.h> 9*81c847bfSMasahiro Yamada #include <mmc.h> 10*81c847bfSMasahiro Yamada #include <spl.h> 11*81c847bfSMasahiro Yamada 12*81c847bfSMasahiro Yamada u32 spl_boot_mode(const u32 boot_device) 13*81c847bfSMasahiro Yamada { 14*81c847bfSMasahiro Yamada struct mmc *mmc; 15*81c847bfSMasahiro Yamada 16*81c847bfSMasahiro Yamada /* 17*81c847bfSMasahiro Yamada * work around a bug in the Boot ROM of PH1-sLD3, LD4, Pro4, and sLD8: 18*81c847bfSMasahiro Yamada * 19*81c847bfSMasahiro Yamada * The boot ROM in these SoCs breaks the PARTITION_CONFIG [179] of 20*81c847bfSMasahiro Yamada * Extended CSD register; when switching to the Boot Partition 1, the 21*81c847bfSMasahiro Yamada * Boot ROM should issue the SWITCH command (CMD6) with Set Bits for 22*81c847bfSMasahiro Yamada * the Access Bits, but in fact it uses Write Byte for the Access Bits. 23*81c847bfSMasahiro Yamada * As a result, the BOOT_PARTITION_ENABLE field of the PARTITION_CONFIG 24*81c847bfSMasahiro Yamada * is lost. This bug was fixed for PH1-Pro5 and later SoCs. 25*81c847bfSMasahiro Yamada * 26*81c847bfSMasahiro Yamada * Fixup mmc->part_config here because it is used to determine the 27*81c847bfSMasahiro Yamada * partition which the U-Boot image is read from. 28*81c847bfSMasahiro Yamada */ 29*81c847bfSMasahiro Yamada mmc = find_mmc_device(0); 30*81c847bfSMasahiro Yamada mmc->part_config &= ~EXT_CSD_BOOT_PART_NUM(PART_ACCESS_MASK); 31*81c847bfSMasahiro Yamada mmc->part_config |= EXT_CSD_BOOT_PARTITION_ENABLE; 32*81c847bfSMasahiro Yamada 33*81c847bfSMasahiro Yamada return MMCSD_MODE_EMMCBOOT; 34*81c847bfSMasahiro Yamada } 35