X201: Enable expresscard hotplug.

Change-Id: Ieefc2ad775c16de9aa974b2602d55ee047c9f568
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4643
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

src/mainboard/lenovo/x201/acpi/gpe.asl

@@ -27,4 +27,18 @@ Scope (\_GPE)
 		/* Read EC register to clear wake status */
 		Store(\_SB.PCI0.LPCB.EC.WAKE, Local0)
 	}
+
+	Method (_L01, 0, NotSerialized)
+	{
+		If (\_SB.PCI0.RP04.HPCS)
+		{
+			Sleep (100)
+			Store (0x01, \_SB.PCI0.RP04.HPCS)
+			If (\_SB.PCI0.RP04.PDC)
+			{
+				Store (0x01, \_SB.PCI0.RP04.PDC)
+				Notify (\_SB.PCI0.RP04, 0x00)
+			}
+		}
+	}
 }

src/mainboard/lenovo/x201/devicetree.cb

@@ -129,6 +129,11 @@ chip northbridge/intel/nehalem
 			device pci 1b.0 on # Audio Controller
 				subsystemid 0x17aa 0x215e
 			end
+
+			device pci 1c.0 on end # PCIe Port #1
+			device pci 1c.3 on end # PCIe Port #4 (Expresscard)
+			device pci 1c.4 on end # PCIe Port #4 (wlan)
+
 			device pci 1d.0 on # USB2 EHCI
 				subsystemid 0x17aa 0x2163
 			end

src/mainboard/lenovo/x201/dsdt.asl

@@ -23,6 +23,7 @@
 #define BRIGHTNESS_UP \_SB.PCI0.GFX0.LCD0.INCB
 #define BRIGHTNESS_DOWN \_SB.PCI0.GFX0.LCD0.DECB
 #define ACPI_VIDEO_DEVICE \_SB.PCI0.GFX0
+#define RP04_IS_EXPRESSCARD 1
 
 DefinitionBlock(
 	"dsdt.aml",

src/mainboard/lenovo/x201/mainboard.c

@@ -163,6 +163,14 @@ static void mainboard_enable(device_t dev)
 	 */
 	pc_keyboard_init(0);
 	verb_setup();
+
+	/* Enable expresscard hotplug events.  */
+	pci_write_config32(dev_find_slot(0, PCI_DEVFN(0x1c, 3)),
+			   0xd8,
+			   pci_read_config32(dev_find_slot(0, PCI_DEVFN(0x1c, 3)), 0xd8)
+			   | (1 << 30));
+	pci_write_config16(dev_find_slot(0, PCI_DEVFN(0x1c, 3)),
+			   0x42, 0x142);
 }
 
 struct chip_operations mainboard_ops = {

src/southbridge/intel/bd82x6x/acpi/pcie.asl

@@ -177,6 +177,17 @@ Device (RP04)
 	{
 		Return (IRQM (RPPN))
 	}
+
+#ifdef RP04_IS_EXPRESSCARD
+	Device (SLOT)
+	{
+		Name (_ADR, 0x00)
+		Method (_RMV, 0, NotSerialized)
+		{
+			Return (0x01)
+		}
+	}
+#endif
 }
 
 Device (RP05)