[POWERPC] Added self_busno to indicate which bus number the PHB is

Added self_busno to pci_controller and indirect PCI ops to be set by
board code to indicate which bus number to use when talking to the PHB.
By default we use zero since the majority of controllers that have
implicit mechanisms to talk to the PHBs use a bus number of zero.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/powerpc/sysdev/indirect_pci.c

@@ -33,6 +33,7 @@ indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
 	struct pci_controller *hose = bus->sysdata;
 	volatile void __iomem *cfg_data;
 	u8 cfg_type = 0;
+	u32 bus_no;
 
 	if (ppc_md.pci_exclude_device)
 		if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
@@ -42,8 +43,11 @@ indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
 		if (bus->number != hose->first_busno)
 			cfg_type = 1;
 
+	bus_no = (bus->number == hose->first_busno) ?
+			hose->self_busno : bus->number - hose->bus_offset;
+
 	PCI_CFG_OUT(hose->cfg_addr,
-		 (0x80000000 | ((bus->number - hose->bus_offset) << 16)
+		 (0x80000000 | (bus_no << 16)
 		  | (devfn << 8) | ((offset & 0xfc) | cfg_type)));
 
 	/*
@@ -72,6 +76,7 @@ indirect_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
 	struct pci_controller *hose = bus->sysdata;
 	volatile void __iomem *cfg_data;
 	u8 cfg_type = 0;
+	u32 bus_no;
 
 	if (ppc_md.pci_exclude_device)
 		if (ppc_md.pci_exclude_device(hose, bus->number, devfn))
@@ -81,8 +86,11 @@ indirect_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
 		if (bus->number != hose->first_busno)
 			cfg_type = 1;
 
+	bus_no = (bus->number == hose->first_busno) ?
+			hose->self_busno : bus->number - hose->bus_offset;
+
 	PCI_CFG_OUT(hose->cfg_addr,
-		 (0x80000000 | ((bus->number - hose->bus_offset) << 16)
+		 (0x80000000 | (bus_no << 16)
 		  | (devfn << 8) | ((offset & 0xfc) | cfg_type)));
 
 	/*

include/asm-ppc/pci-bridge.h

@@ -47,6 +47,7 @@ struct pci_controller {
 
 	int first_busno;
 	int last_busno;
+	int self_busno;
 	int bus_offset;
 
 	void __iomem *io_base_virt;