pci: Allow for PCI addresses to be 64-bit

PCI bus is inherently 64-bit.  While not all system require access to
the full 64-bit PCI address range some do.  This allows those systems
to enable the full PCI address width via CONFIG_SYS_PCI_64BIT.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Fleming-AFLEMING <afleming@freescale.com>
Acked-by: Wolfgang Denk <wd@denx.de>

2 files changed, 78 insertions, 47 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 41780db..e2b05d8 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -218,12 +218,12 @@ pci_dev_t pci_find_device(unsigned int vendor, unsigned int device, int index)
  *
  */
 
-unsigned long pci_hose_phys_to_bus (struct pci_controller *hose,
+pci_addr_t pci_hose_phys_to_bus (struct pci_controller *hose,
 				    phys_addr_t phys_addr,
 				    unsigned long flags)
 {
 	struct pci_region *res;
-	unsigned long bus_addr;
+	pci_addr_t bus_addr;
 	int i;
 
 	if (!hose) {
@@ -252,7 +252,7 @@ Done:
 }
 
 phys_addr_t pci_hose_bus_to_phys(struct pci_controller* hose,
-				 unsigned long bus_addr,
+				 pci_addr_t bus_addr,
 				 unsigned long flags)
 {
 	struct pci_region *res;
@@ -288,15 +288,17 @@ Done:
 int pci_hose_config_device(struct pci_controller *hose,
 			   pci_dev_t dev,
 			   unsigned long io,
-			   unsigned long mem,
+			   pci_addr_t mem,
 			   unsigned long command)
 {
-	unsigned int bar_response, bar_size, bar_value, old_command;
+	unsigned int bar_response, old_command;
+	pci_addr_t bar_value;
+	pci_size_t bar_size;
 	unsigned char pin;
 	int bar, found_mem64;
 
-	debug ("PCI Config: I/O=0x%lx, Memory=0x%lx, Command=0x%lx\n",
-		io, mem, command);
+	debug ("PCI Config: I/O=0x%lx, Memory=0x%llx, Command=0x%lx\n",
+		io, (u64)mem, command);
 
 	pci_hose_write_config_dword (hose, dev, PCI_COMMAND, 0);
 
@@ -319,10 +321,19 @@ int pci_hose_config_device(struct pci_controller *hose,
 			io = io + bar_size;
 		} else {
 			if ((bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
-				PCI_BASE_ADDRESS_MEM_TYPE_64)
-				found_mem64 = 1;
+				PCI_BASE_ADDRESS_MEM_TYPE_64) {
+				u32 bar_response_upper;
+				u64 bar64;
+				pci_hose_write_config_dword(hose, dev, bar+4, 0xffffffff);
+				pci_hose_read_config_dword(hose, dev, bar+4, &bar_response_upper);
 
-			bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				bar64 = ((u64)bar_response_upper << 32) | bar_response;
+
+				bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				found_mem64 = 1;
+			} else {
+				bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1);
+			}
 
 			/* round up region base address to multiple of size */
 			mem = ((mem - 1) | (bar_size - 1)) + 1;
@@ -332,11 +343,15 @@ int pci_hose_config_device(struct pci_controller *hose,
 		}
 
 		/* Write it out and update our limit */
-		pci_hose_write_config_dword (hose, dev, bar, bar_value);
+		pci_hose_write_config_dword (hose, dev, bar, (u32)bar_value);
 
 		if (found_mem64) {
 			bar += 4;
+#ifdef CONFIG_SYS_PCI_64BIT
+			pci_hose_write_config_dword(hose, dev, bar, (u32)(bar_value>>32));
+#else
 			pci_hose_write_config_dword (hose, dev, bar, 0x00000000);
+#endif
 		}
 	}
 
diff --git a/drivers/pci/pci_auto.c b/drivers/pci/pci_auto.c
index 3844359..c20b981 100644
--- a/drivers/pci/pci_auto.c
+++ b/drivers/pci/pci_auto.c
@@ -45,14 +45,14 @@ void pciauto_region_init(struct pci_region* res)
 	res->bus_lower = res->bus_start ? res->bus_start : 0x1000;
 }
 
-void pciauto_region_align(struct pci_region *res, unsigned long size)
+void pciauto_region_align(struct pci_region *res, pci_size_t size)
 {
 	res->bus_lower = ((res->bus_lower - 1) | (size - 1)) + 1;
 }
 
-int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned int *bar)
+int pciauto_region_allocate(struct pci_region* res, pci_size_t size, pci_addr_t *bar)
 {
-	unsigned long addr;
+	pci_addr_t addr;
 
 	if (!res) {
 		DEBUGF("No resource");
@@ -68,13 +68,13 @@ int pciauto_region_allocate(struct pci_region* res, unsigned int size, unsigned
 
 	res->bus_lower = addr + size;
 
-	DEBUGF("address=0x%lx bus_lower=%x", addr, res->bus_lower);
+	DEBUGF("address=0x%llx bus_lower=0x%llx", (u64)addr, (u64)res->bus_lower);
 
 	*bar = addr;
 	return 0;
 
  error:
-	*bar = 0xffffffff;
+	*bar = (pci_addr_t)-1;
 	return -1;
 }
 
@@ -88,7 +88,9 @@ void pciauto_setup_device(struct pci_controller *hose,
 			  struct pci_region *prefetch,
 			  struct pci_region *io)
 {
-	unsigned int bar_value, bar_response, bar_size;
+	unsigned int bar_response;
+	pci_addr_t bar_value;
+	pci_size_t bar_size;
 	unsigned int cmdstat = 0;
 	struct pci_region *bar_res;
 	int bar, bar_nr = 0;
@@ -114,33 +116,46 @@ void pciauto_setup_device(struct pci_controller *hose,
 				   & 0xffff) + 1;
 			bar_res = io;
 
-			DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%x, ", bar_nr, bar_size);
+			DEBUGF("PCI Autoconfig: BAR %d, I/O, size=0x%llx, ", bar_nr, (u64)bar_size);
 		} else {
 			if ( (bar_response & PCI_BASE_ADDRESS_MEM_TYPE_MASK) ==
-			     PCI_BASE_ADDRESS_MEM_TYPE_64)
-				found_mem64 = 1;
+			     PCI_BASE_ADDRESS_MEM_TYPE_64) {
+				u32 bar_response_upper;
+				u64 bar64;
+				pci_hose_write_config_dword(hose, dev, bar+4, 0xffffffff);
+				pci_hose_read_config_dword(hose, dev, bar+4, &bar_response_upper);
+
+				bar64 = ((u64)bar_response_upper << 32) | bar_response;
 
-			bar_size = ~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				bar_size = ~(bar64 & PCI_BASE_ADDRESS_MEM_MASK) + 1;
+				found_mem64 = 1;
+			} else {
+				bar_size = (u32)(~(bar_response & PCI_BASE_ADDRESS_MEM_MASK) + 1);
+			}
 			if (prefetch && (bar_response & PCI_BASE_ADDRESS_MEM_PREFETCH))
 				bar_res = prefetch;
 			else
 				bar_res = mem;
 
-			DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%x, ", bar_nr, bar_size);
+			DEBUGF("PCI Autoconfig: BAR %d, Mem, size=0x%llx, ", bar_nr, (u64)bar_size);
 		}
 
 		if (pciauto_region_allocate(bar_res, bar_size, &bar_value) == 0) {
 			/* Write it out and update our limit */
-			pci_hose_write_config_dword(hose, dev, bar, bar_value);
+			pci_hose_write_config_dword(hose, dev, bar, (u32)bar_value);
 
-			/*
-			 * If we are a 64-bit decoder then increment to the
-			 * upper 32 bits of the bar and force it to locate
-			 * in the lower 4GB of memory.
-			 */
 			if (found_mem64) {
 				bar += 4;
+#ifdef CONFIG_SYS_PCI_64BIT
+				pci_hose_write_config_dword(hose, dev, bar, (u32)(bar_value>>32));
+#else
+				/*
+				 * If we are a 64-bit decoder then increment to the
+				 * upper 32 bits of the bar and force it to locate
+				 * in the lower 4GB of memory.
+				 */
 				pci_hose_write_config_dword(hose, dev, bar, 0x00000000);
+#endif
 			}
 
 			cmdstat |= (bar_response & PCI_BASE_ADDRESS_SPACE) ?
@@ -289,35 +304,36 @@ void pciauto_config_init(struct pci_controller *hose)
 	if (hose->pci_mem) {
 		pciauto_region_init(hose->pci_mem);
 
-		DEBUGF("PCI Autoconfig: Bus Memory region: [%lx-%lx],\n"
-		       "\t\tPhysical Memory [%x-%x]\n",
-		    hose->pci_mem->bus_start,
-		    hose->pci_mem->bus_start + hose->pci_mem->size - 1,
-		    hose->pci_mem->phys_start,
-		    hose->pci_mem->phys_start + hose->pci_mem->size - 1);
+		DEBUGF("PCI Autoconfig: Bus Memory region: [0x%llx-0x%llx],\n"
+		       "\t\tPhysical Memory [%llx-%llxx]\n",
+		    (u64)hose->pci_mem->bus_start,
+		    (u64)(hose->pci_mem->bus_start + hose->pci_mem->size - 1),
+		    (u64)hose->pci_mem->phys_start,
+		    (u64)(hose->pci_mem->phys_start + hose->pci_mem->size - 1));
 	}
 
 	if (hose->pci_prefetch) {
 		pciauto_region_init(hose->pci_prefetch);
 
-		DEBUGF("PCI Autoconfig: Bus Prefetchable Mem: [%lx-%lx],\n"
-		       "\t\tPhysical Memory [%x-%x]\n",
-		    hose->pci_prefetch->bus_start,
-		    hose->pci_prefetch->bus_start + hose->pci_prefetch->size - 1,
-		    hose->pci_prefetch->phys_start,
-		    hose->pci_prefetch->phys_start +
-				hose->pci_prefetch->size - 1);
+		DEBUGF("PCI Autoconfig: Bus Prefetchable Mem: [0x%llx-0x%llx],\n"
+		       "\t\tPhysical Memory [%llx-%llx]\n",
+		    (u64)hose->pci_prefetch->bus_start,
+		    (u64)(hose->pci_prefetch->bus_start +
+			    hose->pci_prefetch->size - 1),
+		    (u64)hose->pci_prefetch->phys_start,
+		    (u64)(hose->pci_prefetch->phys_start +
+			    hose->pci_prefetch->size - 1));
 	}
 
 	if (hose->pci_io) {
 		pciauto_region_init(hose->pci_io);
 
-		DEBUGF("PCI Autoconfig: Bus I/O region: [%lx-%lx],\n"
-		       "\t\tPhysical Memory: [%x-%x]\n",
-		    hose->pci_io->bus_start,
-		    hose->pci_io->bus_start + hose->pci_io->size - 1,
-		    hose->pci_io->phys_start,
-		    hose->pci_io->phys_start + hose->pci_io->size - 1);
+		DEBUGF("PCI Autoconfig: Bus I/O region: [0x%llx-0x%llx],\n"
+		       "\t\tPhysical Memory: [%llx-%llx]\n",
+		    (u64)hose->pci_io->bus_start,
+		    (u64)(hose->pci_io->bus_start + hose->pci_io->size - 1),
+		    (u64)hose->pci_io->phys_start,
+		    (u64)(hose->pci_io->phys_start + hose->pci_io->size - 1));
 
 	}
 }