SSDT-DEHCI.dsl

// Disabling EHCI #1 (and EHCI #2)

//DefinitionBlock("", "SSDT", 2, "hack", "_DEHCI", 0)
//{
    External(_SB.PCI0, DeviceObj)
    External(_SB.PCI0.EH01, DeviceObj)
    External(_SB.PCI0.EH02, DeviceObj)
    External(_SB.PCI0.LPCB, DeviceObj)

    // registers needed for disabling EHC#1
    Scope(_SB.PCI0.EH01)
    {
        OperationRegion(RMP1, PCI_Config, 0x54, 2)
        Field(RMP1, WordAcc, NoLock, Preserve)
        {
            PSTE, 2  // bits 2:0 are power state
        }
    }
    // registers needed for disabling EHC#1
    Scope(_SB.PCI0.EH02)
    {
        OperationRegion(RMP1, PCI_Config, 0x54, 2)
        Field(RMP1, WordAcc, NoLock, Preserve)
        {
            PSTE, 2  // bits 2:0 are power state
        }
    }
    Scope(_SB.PCI0.LPCB)
    {
        OperationRegion(RMP1, PCI_Config, 0xF0, 4)
        Field(RMP1, DWordAcc, NoLock, Preserve)
        {
            RCB1, 32, // Root Complex Base Address
        }
        // address is in bits 31:14
        OperationRegion(FDM1, SystemMemory, (RCB1 & Not((1<<14)-1)) + 0x3418, 4)
        Field(FDM1, DWordAcc, NoLock, Preserve)
        {
            ,13,    // skip first 13 bits
            FDE2,1, // should be bit 13 (0-based) (FD EHCI#2)
            ,1,
            FDE1,1, // should be bit 15 (0-based) (FD EHCI#1)
        }
    }
    Scope(_SB.PCI0)
    {
        Device(RMD2)
        {
            Name(_HID, "RMD20000")
            Method(_INI)
            {
                If (CondRefOf(\_SB.PCI0.EH01))
                {
                    // disable EHCI#1
                    // put EHCI#1 in D3hot (sleep mode)
                    ^^EH01.PSTE = 3
                    // disable EHCI#1 PCI space
                    ^^LPCB.FDE1 = 1
                }

                If (CondRefOf(\_SB.PCI0.EH02))
                {
                    // disable EHCI#2
                    // put EHCI#2 in D3hot (sleep mode)
                    ^^EH02.PSTE = 3
                    // disable EHCI#2 PCI space
                    ^^LPCB.FDE2 = 1
                }
            }
        }
    }
//}
//EOF