intel/fsp_baytrail: Add PCI Root Port IRQ Routing

This change generates the ASL tables needed for the PCIe bridge routing.

It generates this ASL (swizzled for each of the 8 functions)
Name(RP1P, Package()
{
	Package() {0x0000ffff, 0, \_SB.PCI0.LPCB.LNKE, 0 },
	Package() {0x0000ffff, 1, \_SB.PCI0.LPCB.LNKF, 0 },
	Package() {0x0000ffff, 2, \_SB.PCI0.LPCB.LNKG, 0 },
	Package() {0x0000ffff, 3, \_SB.PCI0.LPCB.LNKH, 0 },
})
Name(RP1A, Package()
{
	Package() {0x0000ffff, 0, 0, 20 },
	Package() {0x0000ffff, 1, 0, 21 },
	Package() {0x0000ffff, 2, 0, 22 },
	Package() {0x0000ffff, 3, 0, 23 },
})
Device(RP01) {
	Name(_ADR, 0x1c0001)
	Name(_PRW, Package() {
		0, 0
	})
	Method(_PRT,0) {
		If(PICM) {
			Return (RP1A)
		} Else {
			Return (RP1P)
		}
	}
}

Change-Id: Id51261c11f8457fe2150f2b646aafc4fe1ffec30
Signed-off-by: Martin Roth <gaumless@gmail.com>
Reviewed-on: http://review.coreboot.org/8429
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

3 files changed, 77 insertions, 2 deletions

diff --git a/src/soc/intel/fsp_baytrail/acpi/irq_helper.h b/src/soc/intel/fsp_baytrail/acpi/irq_helper.h
index a0bcbabbbc..4e64ce7f5d 100644
--- a/src/soc/intel/fsp_baytrail/acpi/irq_helper.h
+++ b/src/soc/intel/fsp_baytrail/acpi/irq_helper.h
@@ -37,24 +37,89 @@
 #undef PIRQ_PIC_ROUTES
 #undef PIRQ_PIC
 #undef IRQROUTE_H
+#undef ROOTPORT_METHODS
+#undef RP_METHOD
+#undef ROOTPORT_IRQ_ROUTES
+#undef RP_IRQ_ROUTES
 
 #if defined(PIC_MODE)
 
 #define ACPI_DEV_IRQ(dev_, pin_, pin_name_) \
 	Package() { ## dev_ ## ffff, pin_, \_SB.PCI0.LPCB.LNK ## pin_name_, 0 }
 
+#define RP_IRQ_ROUTES(prefix_, func_, a_, b_, c_, d_) \
+Name(prefix_ ## func_ ## P, Package() \
+{ \
+	ACPI_DEV_IRQ(0x0000, 0, a_), \
+	ACPI_DEV_IRQ(0x0000, 1, b_), \
+	ACPI_DEV_IRQ(0x0000, 2, c_), \
+	ACPI_DEV_IRQ(0x0000, 3, d_), \
+})
+
+/* define as blank so ROOTPORT_METHODS only gets inserted once */
+#define ROOTPORT_METHODS(prefix_, dev_)
+
 #else /* defined(PIC_MODE) */
 
 #define ACPI_DEV_IRQ(dev_, pin_, pin_name_) \
 	Package() { ## dev_ ## ffff, pin_, 0, PIRQ ## pin_name_ ## _APIC_IRQ }
 
-#endif
+#define RP_IRQ_ROUTES(prefix_, func_, a_, b_, c_, d_) \
+Name(prefix_ ## func_ ## A, Package() \
+{ \
+	ACPI_DEV_IRQ(0x0000, 0, a_), \
+	ACPI_DEV_IRQ(0x0000, 1, b_), \
+	ACPI_DEV_IRQ(0x0000, 2, c_), \
+	ACPI_DEV_IRQ(0x0000, 3, d_), \
+})
+
+#define ROOTPORT_METHODS(prefix_, dev_) \
+	RP_METHOD(prefix_, dev_, 0) \
+	RP_METHOD(prefix_, dev_, 1) \
+	RP_METHOD(prefix_, dev_, 2) \
+	RP_METHOD(prefix_, dev_, 3) \
+	RP_METHOD(prefix_, dev_, 4) \
+	RP_METHOD(prefix_, dev_, 5) \
+	RP_METHOD(prefix_, dev_, 6) \
+	RP_METHOD(prefix_, dev_, 7)
+
+#endif /* defined(PIC_MODE) */
 
 #define PCI_DEV_PIRQ_ROUTE(dev_, a_, b_, c_, d_) \
 	ACPI_DEV_IRQ(dev_, 0, a_), \
 	ACPI_DEV_IRQ(dev_, 1, b_), \
 	ACPI_DEV_IRQ(dev_, 2, c_), \
-	ACPI_DEV_IRQ(dev_, 3, d_)
+	ACPI_DEV_IRQ(dev_, 3, d_), \
+
+#define PCIE_BRIDGE_DEV(prefix_, dev_, a_, b_, c_, d_) \
+	ROOTPORT_IRQ_ROUTES(prefix_, a_, b_, c_, d_) \
+	ROOTPORT_METHODS(prefix_, dev_)
+
+#define ROOTPORT_IRQ_ROUTES(prefix_, a_, b_, c_, d_) \
+	RP_IRQ_ROUTES(prefix_, 0, a_, b_, c_, d_) \
+	RP_IRQ_ROUTES(prefix_, 1, b_, c_, d_, a_) \
+	RP_IRQ_ROUTES(prefix_, 2, c_, d_, a_, b_) \
+	RP_IRQ_ROUTES(prefix_, 3, d_, a_, b_, c_) \
+	RP_IRQ_ROUTES(prefix_, 4, a_, b_, c_, d_) \
+	RP_IRQ_ROUTES(prefix_, 5, b_, c_, d_, a_) \
+	RP_IRQ_ROUTES(prefix_, 6, c_, d_, a_, b_) \
+	RP_IRQ_ROUTES(prefix_, 7, d_, a_, b_, c_)
+
+#define RP_METHOD(prefix_, dev_, func_)\
+Device(prefix_ ## 0 ## func_) \
+{ \
+	Name(_ADR, dev_ ## 000 ## func_) \
+	Name(_PRW, Package() { \
+		0, 0 \
+	}) \
+	Method(_PRT,0) { \
+		If(PICM) { \
+			Return (prefix_ ## func_ ## A) \
+		 } Else { \
+			Return (prefix_ ## func_ ## P) \
+		 } \
+	} \
+}
 
 /* Empty PIRQ_PIC definition. */
 #define PIRQ_PIC(pirq_, pic_irq_)
diff --git a/src/soc/intel/fsp_baytrail/acpi/irqroute.asl b/src/soc/intel/fsp_baytrail/acpi/irqroute.asl
index 940f853e5a..e6d7a5823d 100644
--- a/src/soc/intel/fsp_baytrail/acpi/irqroute.asl
+++ b/src/soc/intel/fsp_baytrail/acpi/irqroute.asl
@@ -40,4 +40,11 @@ Method(_PRT)
 			PCI_DEV_PIRQ_ROUTES
 		})
 	}
+
 }
+
+PCIE_BRIDGE_IRQ_ROUTES
+#undef PIC_MODE
+#include "irq_helper.h"
+PCIE_BRIDGE_IRQ_ROUTES
+
diff --git a/src/soc/intel/fsp_baytrail/baytrail/irq.h b/src/soc/intel/fsp_baytrail/baytrail/irq.h
index 98ca116c57..6f56b1ffd9 100644
--- a/src/soc/intel/fsp_baytrail/baytrail/irq.h
+++ b/src/soc/intel/fsp_baytrail/baytrail/irq.h
@@ -160,6 +160,9 @@ extern const struct baytrail_irq_route global_baytrail_irq_route;
 #define PIRQ_PIC(pirq_, pic_irq_) \
 	[PIRQ ## pirq_] = PIRQ_PIC_IRQ ## pic_irq_
 
+/* used for ACPI only */
+#define PCIE_BRIDGE_DEV(prefix_, dev_, a_, b_, c_, d_)
+
 #endif /* !defined(__ASSEMBLER__) && !defined(__ACPI__) */
 
 #endif /* _BAYTRAIL_IRQ_H_ */