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a38a637f5c
This driver is not tested and probably not used on any modern hardware machine, because it is plugged into the ISA bus and not the PCI bus. Also, the run script doesn't utilize this device anymore, making it more hard to test this driver and to ensure it doesn't rot.
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Singleton.h>
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Bus/PCI/IDs.h>
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#include <Kernel/Devices/Audio/AC97.h>
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#include <Kernel/Devices/Audio/Management.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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static Singleton<AudioManagement> s_the;
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static Atomic<u32> s_device_minor_number;
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MajorNumber AudioManagement::audio_type_major_number()
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{
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return 116;
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}
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MinorNumber AudioManagement::generate_storage_minor_number()
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{
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auto minor_number = s_device_minor_number.load();
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s_device_minor_number++;
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return minor_number;
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}
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AudioManagement& AudioManagement::the()
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{
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return *s_the;
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}
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UNMAP_AFTER_INIT AudioManagement::AudioManagement()
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{
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}
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UNMAP_AFTER_INIT void AudioManagement::enumerate_hardware_controllers()
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{
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PCI::enumerate([&](PCI::DeviceIdentifier const& device_identifier) {
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// Note: Only consider PCI audio controllers
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if (device_identifier.class_code().value() != to_underlying(PCI::ClassID::Multimedia)
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|| device_identifier.subclass_code().value() != to_underlying(PCI::Multimedia::SubclassID::AudioController))
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return;
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dbgln("AC97: found audio controller at {}", device_identifier.address());
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// FIXME: Propagate errors properly
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m_controllers_list.append(AC97::try_create(device_identifier).release_value());
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});
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}
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UNMAP_AFTER_INIT void AudioManagement::enumerate_hardware_audio_channels()
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{
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for (auto& controller : m_controllers_list)
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controller.detect_hardware_audio_channels({});
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}
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UNMAP_AFTER_INIT bool AudioManagement::initialize()
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{
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/* Explanation on the flow:
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* 1. Enumerate all audio controllers connected to the system:
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* a. Try to find the SB16 ISA-based controller.
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* b. Enumerate the PCI bus and try to find audio controllers there too
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* 2. Ask each controller to detect the audio channels and instantiate AudioChannel objects.
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*/
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enumerate_hardware_controllers();
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enumerate_hardware_audio_channels();
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if (m_controllers_list.is_empty()) {
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dbgln("No audio controller was initialized.");
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return false;
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}
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return true;
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}
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}
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