mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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74 lines
2.9 KiB
C++
74 lines
2.9 KiB
C++
/*
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* Copyright (c) 2018-2019 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 "boot_i2c_utils.hpp"
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namespace ams::boot {
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namespace {
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template<typename F>
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constexpr Result RetryUntilSuccess(F f) {
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constexpr u64 timeout = 10'000'000'000ul;
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constexpr u64 retry_interval = 20'000'000ul;
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u64 cur_time = 0;
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while (true) {
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const auto retry_result = f();
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R_UNLESS(R_FAILED(retry_result), ResultSuccess());
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cur_time += retry_interval;
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if (cur_time < timeout) {
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svcSleepThread(retry_interval);
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continue;
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}
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return retry_result;
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}
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}
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}
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Result ReadI2cRegister(i2c::driver::Session &session, u8 *dst, size_t dst_size, const u8 *cmd, size_t cmd_size) {
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AMS_ASSERT(dst != nullptr && dst_size > 0);
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AMS_ASSERT(cmd != nullptr && cmd_size > 0);
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u8 cmd_list[i2c::CommandListFormatter::MaxCommandListSize];
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i2c::CommandListFormatter formatter(cmd_list, sizeof(cmd_list));
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R_ASSERT(formatter.EnqueueSendCommand(I2cTransactionOption_Start, cmd, cmd_size));
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R_ASSERT(formatter.EnqueueReceiveCommand(static_cast<I2cTransactionOption>(I2cTransactionOption_Start | I2cTransactionOption_Stop), dst_size));
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return RetryUntilSuccess([&]() { return i2c::driver::ExecuteCommandList(session, dst, dst_size, cmd_list, formatter.GetCurrentSize()); });
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}
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Result WriteI2cRegister(i2c::driver::Session &session, const u8 *src, size_t src_size, const u8 *cmd, size_t cmd_size) {
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AMS_ASSERT(src != nullptr && src_size > 0);
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AMS_ASSERT(cmd != nullptr && cmd_size > 0);
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u8 cmd_list[0x20];
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/* N doesn't use a CommandListFormatter here... */
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std::memcpy(&cmd_list[0], cmd, cmd_size);
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std::memcpy(&cmd_list[cmd_size], src, src_size);
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return RetryUntilSuccess([&]() { return i2c::driver::Send(session, cmd_list, src_size + cmd_size, static_cast<I2cTransactionOption>(I2cTransactionOption_Start | I2cTransactionOption_Stop)); });
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}
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Result WriteI2cRegister(i2c::driver::Session &session, const u8 address, const u8 value) {
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return WriteI2cRegister(session, &value, sizeof(value), &address, sizeof(address));
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}
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}
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