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156 lines
5.4 KiB
Markdown
156 lines
5.4 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. 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.
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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.
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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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