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97 lines
3 KiB
C++
97 lines
3 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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namespace ams::cfg {
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namespace {
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/* Convenience definitions. */
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constexpr sm::ServiceName RequiredServicesForSdCardAccess[] = {
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sm::ServiceName::Encode("pcv"),
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sm::ServiceName::Encode("gpio"),
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sm::ServiceName::Encode("pinmux"),
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sm::ServiceName::Encode("psc:m"),
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};
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constexpr size_t NumRequiredServicesForSdCardAccess = util::size(RequiredServicesForSdCardAccess);
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/* SD card globals. */
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os::Mutex g_sd_card_lock;
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bool g_sd_card_initialized = false;
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FsFileSystem g_sd_card_filesystem = {};
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/* SD card helpers. */
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Result CheckSdCardServicesReady() {
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for (size_t i = 0; i < NumRequiredServicesForSdCardAccess; i++) {
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bool service_present = false;
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R_TRY(sm::HasService(&service_present, RequiredServicesForSdCardAccess[i]));
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if (!service_present) {
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return fs::ResultSdCardNotPresent();
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}
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}
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return ResultSuccess();
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}
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void WaitSdCardServicesReadyImpl() {
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for (size_t i = 0; i < NumRequiredServicesForSdCardAccess; i++) {
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R_ASSERT(sm::WaitService(RequiredServicesForSdCardAccess[i]));
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}
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}
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Result TryInitializeSdCard() {
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R_TRY(CheckSdCardServicesReady());
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R_ASSERT(fsOpenSdCardFileSystem(&g_sd_card_filesystem));
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g_sd_card_initialized = true;
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return ResultSuccess();
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}
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void InitializeSdCard() {
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WaitSdCardServicesReadyImpl();
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R_ASSERT(fsOpenSdCardFileSystem(&g_sd_card_filesystem));
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g_sd_card_initialized = true;
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}
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}
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/* SD card utilities. */
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bool IsSdCardRequiredServicesReady() {
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return R_SUCCEEDED(CheckSdCardServicesReady());
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}
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void WaitSdCardRequiredServicesReady() {
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WaitSdCardServicesReadyImpl();
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}
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bool IsSdCardInitialized() {
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std::scoped_lock lk(g_sd_card_lock);
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if (!g_sd_card_initialized) {
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if (R_SUCCEEDED(TryInitializeSdCard())) {
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g_sd_card_initialized = true;
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}
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}
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return g_sd_card_initialized;
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}
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void WaitSdCardInitialized() {
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std::scoped_lock lk(g_sd_card_lock);
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InitializeSdCard();
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}
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}
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