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There should be some possible LPC pathing for readers to reference in case they do not have PNP0C09. Otherwise they may give up and use prebuilt instead as it's the easiest method.
160 lines
5.6 KiB
Markdown
160 lines
5.6 KiB
Markdown
# Fixing Embedded Controllers: Manual
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- [Fixing Embedded Controllers: Manual](#fixing-embedded-controllers-manual)
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- [Finding the ACPI path](#finding-the-acpi-path)
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- [DSDT](#dsdt)
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- [DeviceManager](#devicemanager)
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- [Edits to the sample SSDT](#edits-to-the-sample-ssdt)
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- [Edge Cases](#edge-cases)
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- [Multiple PNP0C09's show up](#multiple-pnp0c09s-show-up)
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- [No PNP0C09 show up](#no-pnp0c09-show-up)
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- [PNP0C09 already named `EC`](#pnp0c09-already-named-ec)
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- [PNP0C09 already has an `_STA` method](#pnp0c09-already-has-an-_sta-method)
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- [Compiling the SSDT](#compiling-the-ssdt)
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- [Wrapping up](#wrapping-up)
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TO-DO:
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* Finish Edge cases and sample SSDT edits
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## Finding the ACPI path
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To find the ACPI pathing, you have 2 methods:
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* [DSDT](#DSDT)
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* [DeviceManager](#devicemanager)
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### DSDT
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Finding the ACPI pathing is quite easy actually, first open your decompiled DSDT you got from [Dumping the DSDT](/Manual/dump.md) and [Decompiling and Compiling](/Manual/compile.md) with either maciASL(if in macOS) or any other text editor if in Windows or Linux(VSCode has an [ACPI extension](https://marketplace.visualstudio.com/items?itemName=Thog.vscode-asl) that can also help).
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Next, search for `PNP0C09`. You should get something similar:
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From the above example we see 2 main things:
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* Name of our embedded controller
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* In this case being `EC0`
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* Pathing of our embedded controller
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* `PC00.LPC0`
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But now we get into edge case territory, what fun!
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The main ones to check for are:
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- [Fixing Embedded Controllers: Manual](#fixing-embedded-controllers-manual)
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- [Finding the ACPI path](#finding-the-acpi-path)
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- [DSDT](#dsdt)
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- [DeviceManager](#devicemanager)
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- [Edits to the sample SSDT](#edits-to-the-sample-ssdt)
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- [Edge Cases](#edge-cases)
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- [Multiple PNP0C09's show up](#multiple-pnp0c09s-show-up)
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- [No PNP0C09 show up](#no-pnp0c09-show-up)
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- [PNP0C09 already named `EC`](#pnp0c09-already-named-ec)
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- [PNP0C09 already has an `_STA` method](#pnp0c09-already-has-an-_sta-method)
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- [Compiling the SSDT](#compiling-the-ssdt)
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- [Wrapping up](#wrapping-up)
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If none of the above apply to you, you're ready for the next section:
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### DeviceManager
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If you already have Windows installed on this machine, finding the EC pathing is fairly easy.
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Start by opening up Device Manager in Windows and looking for a device named `Embedded Controller`. Once found, click on it and select the `BIOS device Name` entry. You should get something like this:
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From the above, we can see that our pathing is `SB.PC00.LPC0.EC0`
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Now with the pathing, you can head here: [Edits to the sample SSDT](#edits-to-the-sample-ssdt)
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## Edits to the sample SSDT
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Now that we have our ACPI path, lets grab our SSDT and get to work:
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* [SSDT-EC-USBX](https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-EC-USBX.dsl)
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* For Skylake and newer and all AMD systems
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* [SSDT-EC](https://github.com/acidanthera/OpenCorePkg/blob/master/Docs/AcpiSamples/SSDT-EC.dsl)
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* For Broadwell and older
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Now when opening this SSDT, you'll notice a few things. Mainly:
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* Some code is commented out
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* This is code for disabling our EC
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* Laptops users **SHOULD NOT** uncomment this
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* There's a new EC called `Device (EC)`
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* **DO NOT RENAME THIS**, this will be the EC we give to macOS
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**Before**:
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```
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External (_SB_.PCI0.LPCB, DeviceObj) <- Rename this
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Scope (_SB.PCI0.LPCB) <- Rename this
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```
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Following the example pathing we found, the SSDT should look something like this:
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**After**:
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```
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External (_SB_.PC00.LPC0, DeviceObj) <- Renamed
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Scope (_SB.PC00.LPC0) <- Renamed
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```
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## Edge Cases
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### Multiple PNP0C09's show up
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When multiple PNP0C09 show up, we need to next check for the following properties:
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* `_HID` (Hardware ID)
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* `_CRS` (Current Resource Settings)
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* `_GPE` (General Purpose Events)
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What these signify is whether this PNP0C09 device is real or not, as per the [ACPI spec](https://uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf). So one's matching the above criteria are the one's we want to disable.
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* Note: If _STA shows up as well, you'll need to go here: [PNP0C09 already has an `_STA` method](#pnp0c09-already-has-an-sta-method)
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### No PNP0C09 show up
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When this happens, you'll only need to create a "dummy" EC for macOS.
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Try searching for any devices named: "LPCB", "LPC0", "LPC", "SBRG", "PX40". If you have any of these, try using the LPC pathing of each of those device in place of the Embedded Controller's pathing.
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Note that **DO NOT** uncomment the EC disaling code as there are no devices that is considered "EC" in your machine.
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### PNP0C09 already named `EC`
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Congrats! No need to create an SSDT-EC! However you will still want USBX if you're skylake or newer.
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Prebuilt can be grabbed here: [SSDT-USBX.aml](https://github.com/dortania/USB-Map-Guide/blob/master/extra-files/SSDT-USBX.aml)
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### PNP0C09 already has an `_STA` method
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This is the equivalent of not having an EC as we can't control it with our SSDT-EC, instead we'll need to create a "dummy" EC for macOS. You'll still want to find the PCI and LPC pathing for this device. So follow the guide as if you were creating a laptop SSDT-EC/USBX.
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Example of an EC with STA already:
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## Compiling the SSDT
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With the SSDT done, you're now [ready to compile the SSDT!](/Manual/compile.md)
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## Wrapping up
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Once you're done making your SSDT, either head to the next page to finish the rest of the SSDTs or head here if you're ready to wrap up:
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* [**Cleanup**](/cleanup.md)
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