x86: baytrail: Add internal UART ASL description

[oweals/u-boot.git] / arch / x86 / include / asm / arch-baytrail / acpi / lpc.asl

diff --git a/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl b/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl
index 1dca9770c56b6ee4345d1e9fab772aee96746d41..385671c9688167d17fd43eb15ddef716212adfc7 100644 (file)
--- a/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl
+++ b/arch/x86/include/asm/arch-baytrail/acpi/lpc.asl
@@ -14,6 +14,15 @@ Device (LPCB)
 {
        Name(_ADR, 0x001f0000)
 
+       OperationRegion(LPC0, PCI_Config, 0x00, 0x100)
+       Field(LPC0, AnyAcc, NoLock, Preserve) {
+               Offset(0x08),
+               SRID, 8,
+               Offset(0x80),
+               C1EN, 1,
+               Offset(0x84)
+       }
+
        #include "irqlinks.asl"
 
        /* Firmware Hub */
@@ -81,6 +90,57 @@ Device (LPCB)
                }
        }
 
+       /* Internal UART */
+       Device (IURT)
+       {
+               Name(_HID, EISAID("PNP0501"))
+               Name(_UID, 1)
+
+               Method(_STA, 0, Serialized)
+               {
+                       /*
+                        * TODO:
+                        *
+                        * Need to hide the internal UART depending on whether
+                        * internal UART is enabled or not so that external
+                        * SuperIO UART can be exposed to system.
+                        */
+                       Store(1, UI3E)
+                       Store(1, UI4E)
+                       Store(1, C1EN)
+                       Return (STA_VISIBLE)
+
+               }
+
+               Method(_DIS, 0, Serialized)
+               {
+                       Store(0, UI3E)
+                       Store(0, UI4E)
+                       Store(0, C1EN)
+               }
+
+               Method(_CRS, 0, Serialized)
+               {
+                       Name(BUF0, ResourceTemplate()
+                       {
+                               IO(Decode16, 0x03f8, 0x03f8, 0x01, 0x08)
+                               IRQNoFlags() { 3 }
+                       })
+
+                       Name(BUF1, ResourceTemplate()
+                       {
+                               IO(Decode16, 0x03f8, 0x03f8, 0x01, 0x08)
+                               IRQNoFlags() { 4 }
+                       })
+
+                       If (LLessEqual(SRID, 0x04)) {
+                               Return (BUF0)
+                       } Else {
+                               Return (BUF1)
+                       }
+               }
+       }
+
        /* Real Time Clock */
        Device (RTC)
        {