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Kernel: Report AC'97 vendor and device ID
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parent
9fcd3f7920
commit
4f91616759
2 changed files with 14 additions and 9 deletions
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@ -78,10 +78,20 @@ UNMAP_AFTER_INIT ErrorOr<void> AC97::initialize()
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dbgln_if(AC97_DEBUG, "AC97 @ {}: mixer base: {:#04x}", pci_address(), m_io_mixer_base.get());
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dbgln_if(AC97_DEBUG, "AC97 @ {}: bus base: {:#04x}", pci_address(), m_io_bus_base.get());
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enable_pin_based_interrupts();
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PCI::enable_bus_mastering(pci_address());
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// Read out AC'97 codec revision and vendor
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auto extended_audio_id = m_io_mixer_base.offset(NativeAudioMixerRegister::ExtendedAudioID).in<u16>();
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m_codec_revision = static_cast<AC97Revision>(((extended_audio_id & ExtendedAudioMask::Revision) >> 10) & 0b11);
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dbgln_if(AC97_DEBUG, "AC97 @ {}: codec revision {:#02b}", pci_address(), to_underlying(m_codec_revision));
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if (m_codec_revision == AC97Revision::Reserved)
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return ENOTSUP;
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// Report vendor / device ID
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u32 vendor_id = m_io_mixer_base.offset(NativeAudioMixerRegister::VendorID1).in<u16>() << 16 | m_io_mixer_base.offset(NativeAudioMixerRegister::VendorID2).in<u16>();
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dbgln("AC97 @ {}: Vendor ID: {:#8x}", pci_address(), vendor_id);
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// Bus cold reset, enable interrupts
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enable_pin_based_interrupts();
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PCI::enable_bus_mastering(pci_address());
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auto control = m_io_bus_base.offset(NativeAudioBusRegister::GlobalControl).in<u32>();
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control |= GlobalControlFlag::GPIInterruptEnable;
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control |= GlobalControlFlag::AC97ColdReset;
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@ -90,13 +100,6 @@ UNMAP_AFTER_INIT ErrorOr<void> AC97::initialize()
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// Reset mixer
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m_io_mixer_base.offset(NativeAudioMixerRegister::Reset).out<u16>(1);
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// Read out AC'97 codec revision
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auto extended_audio_id = m_io_mixer_base.offset(NativeAudioMixerRegister::ExtendedAudioID).in<u16>();
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m_codec_revision = static_cast<AC97Revision>(((extended_audio_id & ExtendedAudioMask::Revision) >> 10) & 0b11);
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dbgln_if(AC97_DEBUG, "AC97 @ {}: codec revision {:#02b}", pci_address(), to_underlying(m_codec_revision));
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if (m_codec_revision == AC97Revision::Reserved)
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return ENOTSUP;
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// Enable variable and double rate PCM audio if supported
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auto extended_audio_status_control_register = m_io_mixer_base.offset(NativeAudioMixerRegister::ExtendedAudioStatusControl);
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auto extended_audio_status = extended_audio_status_control_register.in<u16>();
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@ -40,6 +40,8 @@ private:
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ExtendedAudioID = 0x28,
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ExtendedAudioStatusControl = 0x2a,
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PCMFrontDACRate = 0x2c,
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VendorID1 = 0x7c,
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VendorID2 = 0x7e,
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};
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enum ExtendedAudioMask : u16 {
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