2020-11-21 06:29:24 +00:00
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/*
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2021-10-04 20:59:10 +01:00
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* Copyright (c) Atmosphère-NX
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2020-11-21 06:29:24 +00:00
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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 <exosphere.hpp>
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#include "fatal_sound.hpp"
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namespace ams::secmon::fatal {
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namespace {
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constexpr inline int I2cAddressMaxAlc5639 = 0x1C;
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constexpr inline uintptr_t GPIO = secmon::MemoryRegionVirtualDeviceGpio.GetAddress();
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constexpr size_t GPIO_PORT7_CNF_1 = 0x604;
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constexpr size_t GPIO_PORT7_OE_1 = 0x614;
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constexpr size_t GPIO_PORT7_OUT_1 = 0x624;
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void WriteAlc5639Register(int r, u16 val) {
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i2c::Send(i2c::Port_1, I2cAddressMaxAlc5639, r, std::addressof(val), sizeof(val));
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}
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}
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void StopSound() {
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/* Mute output to the speaker, setting left/right volume to 0 DB. */
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WriteAlc5639Register(0x01, 0xC8C8);
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/* Mute output to headphones, setting left/right volume to 0 DB. */
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WriteAlc5639Register(0x02, 0xC8C8);
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/* Clear all Power Management Control registers by writing 0x0000 to them. */
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for (int r = 0x61; r <= 0x66; ++r) {
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WriteAlc5639Register(r, 0x0000);
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}
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/* Configure CodecLdoEn as GPIO. */
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reg::SetBits(GPIO + GPIO_PORT7_CNF_1, (1u << 4));
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/* Configure CodecLdoEn as Output. */
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reg::SetBits(GPIO + GPIO_PORT7_OE_1, (1u << 4));
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/* Wait 200 milliseconds for config to take effect. */
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util::WaitMicroSeconds(200'000ul);
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/* Pull CodecLdoEn low. */
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reg::ClearBits(GPIO + GPIO_PORT7_OUT_1, (1u << 4));
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}
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}
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