Atmosphere/fusee/program/source/fusee_mmc.cpp

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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <exosphere.hpp>
#include "fusee_mmc.hpp"
namespace ams::nxboot {
namespace {
constexpr inline auto MmcPort = sdmmc::Port_Mmc0;
alignas(0x10) constinit u8 g_mmc_work_buffer[sdmmc::MmcWorkBufferSize];
constinit inline auto g_mmc_partition = sdmmc::MmcPartition_Unknown;
Result SelectMmcPartition(sdmmc::MmcPartition partition) {
/* Change partition, if we need to. */
if (partition != g_mmc_partition) {
R_TRY(sdmmc::SelectMmcPartition(MmcPort, partition));
g_mmc_partition = partition;
}
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R_SUCCEED();
}
}
Result InitializeMmc() {
/* Initialize the mmc. */
sdmmc::Initialize(MmcPort);
/* Set the mmc work buffer. */
sdmmc::SetMmcWorkBuffer(MmcPort, g_mmc_work_buffer, sizeof(g_mmc_work_buffer));
/* Activate the mmc. */
R_RETURN(sdmmc::Activate(MmcPort));
}
Result CheckMmcConnection(sdmmc::SpeedMode *out_sm, sdmmc::BusWidth *out_bw) {
R_RETURN(sdmmc::CheckMmcConnection(out_sm, out_bw, MmcPort));
}
Result GetMmcMemoryCapacity(u32 *out_num_sectors, sdmmc::MmcPartition partition) {
if (partition == sdmmc::MmcPartition_UserData) {
R_RETURN(sdmmc::GetDeviceMemoryCapacity(out_num_sectors, MmcPort));
} else {
R_RETURN(sdmmc::GetMmcBootPartitionCapacity(out_num_sectors, MmcPort));
}
}
Result ReadMmc(void *dst, size_t size, sdmmc::MmcPartition partition, size_t sector_index, size_t sector_count) {
R_TRY(SelectMmcPartition(partition));
R_RETURN(sdmmc::Read(dst, size, MmcPort, sector_index, sector_count));
}
Result WriteMmc(sdmmc::MmcPartition partition, size_t sector_index, size_t sector_count, const void *src, size_t size) {
R_TRY(SelectMmcPartition(partition));
R_RETURN(sdmmc::Write(MmcPort, sector_index, sector_count, src, size));
}
}