driver/fsl_pci: Add fsl_pci_init_port function to initialize a PCI controller

fsl_pci_init_port can be called from board specific PCI initialization
routines to setup the PCI (or PCIe) controller.  This will reduce code
redundancy in most of the 85xx/86xx FSL board ports that setup PCI.

Signed-off-by: Poonam Aggrwal <poonam.aggrwal@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

drivers/pci/fsl_pci_init.c

@@ -412,6 +412,50 @@ void fsl_pci_init(struct pci_controller *hose, u32 cfg_addr, u32 cfg_data)
 	}
 }
 
+int fsl_pci_init_port(struct fsl_pci_info *pci_info,
+			struct pci_controller *hose, int busno)
+{
+	volatile ccsr_fsl_pci_t *pci;
+	struct pci_region *r;
+
+	pci = (ccsr_fsl_pci_t *) pci_info->regs;
+
+	/* on non-PCIe controllers we don't have pme_msg_det so this code
+	 * should do nothing since the read will return 0
+	 */
+	if (in_be32(&pci->pme_msg_det)) {
+		out_be32(&pci->pme_msg_det, 0xffffffff);
+		debug (" with errors.  Clearing.  Now 0x%08x",
+			pci->pme_msg_det);
+	}
+
+	r = hose->regions + hose->region_count;
+
+	/* outbound memory */
+	pci_set_region(r++,
+			pci_info->mem_bus,
+			pci_info->mem_phys,
+			pci_info->mem_size,
+			PCI_REGION_MEM);
+
+	/* outbound io */
+	pci_set_region(r++,
+			pci_info->io_bus,
+			pci_info->io_phys,
+			pci_info->io_size,
+			PCI_REGION_IO);
+
+	hose->region_count = r - hose->regions;
+	hose->first_busno = busno;
+
+	fsl_pci_init(hose, (u32)&pci->cfg_addr, (u32)&pci->cfg_data);
+
+	printf("\n    PCIE%x on bus %02x - %02x\n", pci_info->pci_num,
+			hose->first_busno, hose->last_busno);
+
+	return(hose->last_busno + 1);
+}
+
 /* Enable inbound PCI config cycles for agent/endpoint interface */
 void fsl_pci_config_unlock(struct pci_controller *hose)
 {

include/asm-ppc/fsl_pci.h

@@ -154,4 +154,30 @@ typedef struct ccsr_pci {
 	char	res24[252];
 } ccsr_fsl_pci_t;
 
+struct fsl_pci_info {
+	unsigned long	regs;
+	pci_addr_t	mem_bus;
+	phys_size_t	mem_phys;
+	pci_size_t	mem_size;
+	pci_addr_t	io_bus;
+	phys_size_t	io_phys;
+	pci_size_t	io_size;
+	int		pci_num;
+};
+
+int fsl_pci_init_port(struct fsl_pci_info *pci_info,
+				struct pci_controller *hose, int busno);
+
+#define SET_STD_PCIE_INFO(x, num) \
+{			\
+	x.regs = CONFIG_SYS_PCIE##num##_ADDR;	\
+	x.mem_bus = CONFIG_SYS_PCIE##num##_MEM_BUS; \
+	x.mem_phys = CONFIG_SYS_PCIE##num##_MEM_PHYS; \
+	x.mem_size = CONFIG_SYS_PCIE##num##_MEM_SIZE; \
+	x.io_bus = CONFIG_SYS_PCIE##num##_IO_BUS; \
+	x.io_phys = CONFIG_SYS_PCIE##num##_IO_PHYS; \
+	x.io_size = CONFIG_SYS_PCIE##num##_IO_SIZE; \
+	x.pci_num = num; \
+}
+
 #endif