[POWERPC] Make endianess of cfg_addr for indirect pci ops runtime

Make it so we do a runtime check to know if we need to write cfg_addr
as big or little endian.  This is needed if we want to allow 86xx support
to co-exist in the same kernel as other 6xx PPCs.

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

arch/powerpc/Kconfig

@@ -411,11 +411,6 @@ config PPC_INDIRECT_PCI
 	default y if 40x || 44x
 	default n
 
-config PPC_INDIRECT_PCI_BE
-	bool
-	depends PPC_INDIRECT_PCI
-	default n
-
 config EISA
 	bool
 

arch/powerpc/platforms/82xx/mpc82xx_ads.c

@@ -553,7 +553,8 @@ static void __init mpc82xx_add_bridge(struct device_node *np)
 
 	setup_indirect_pci(hose,
 			   r.start + offsetof(pci_cpm2_t, pci_cfg_addr),
-			   r.start + offsetof(pci_cpm2_t, pci_cfg_data));
+			   r.start + offsetof(pci_cpm2_t, pci_cfg_data),
+			   0);
 
 	pci_process_bridge_OF_ranges(hose, np, 1);
 }

arch/powerpc/platforms/83xx/pci.c

@@ -74,11 +74,11 @@ int __init mpc83xx_add_bridge(struct device_node *dev)
 	 */
 	/* PCI 1 */
 	if ((rsrc.start & 0xfffff) == 0x8500) {
-		setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304);
+		setup_indirect_pci(hose, immr + 0x8300, immr + 0x8304, 0);
 	}
 	/* PCI 2 */
 	if ((rsrc.start & 0xfffff) == 0x8600) {
-		setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384);
+		setup_indirect_pci(hose, immr + 0x8380, immr + 0x8384, 0);
 		primary = 0;
 	}
 

arch/powerpc/platforms/85xx/Kconfig

@@ -51,7 +51,6 @@ config MPC85xx
 	bool
 	select PPC_UDBG_16550
 	select PPC_INDIRECT_PCI if PCI
-	select PPC_INDIRECT_PCI_BE if PCI
 	select MPIC
 	select FSL_PCI if PCI
 	select SERIAL_8250_SHARE_IRQ if SERIAL_8250

arch/powerpc/platforms/86xx/Kconfig

@@ -14,7 +14,6 @@ endchoice
 
 config MPC8641
 	bool
-	select PPC_INDIRECT_PCI_BE if PCI
 	select FSL_PCI if PCI
 	select PPC_UDBG_16550
 	select MPIC

arch/powerpc/platforms/chrp/pci.c

@@ -181,7 +181,7 @@ setup_python(struct pci_controller *hose, struct device_node *dev)
 	}
 	iounmap(reg);
 
-	setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010);
+	setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010, 0);
 }
 
 /* Marvell Discovery II based Pegasos 2 */
@@ -277,13 +277,14 @@ chrp_find_bridges(void)
 			hose->cfg_data = p;
 			gg2_pci_config_base = p;
 		} else if (is_pegasos == 1) {
-			setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc);
+			setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc, 0);
 		} else if (is_pegasos == 2) {
 			setup_peg2(hose, dev);
 		} else if (!strncmp(model, "IBM,CPC710", 10)) {
 			setup_indirect_pci(hose,
 					   r.start + 0x000f8000,
-					   r.start + 0x000f8010);
+					   r.start + 0x000f8010,
+					   0);
 			if (index == 0) {
 				dma = of_get_property(dev, "system-dma-base",
 							&len);

arch/powerpc/platforms/embedded6xx/linkstation.c

@@ -73,7 +73,7 @@ static int __init linkstation_add_bridge(struct device_node *dev)
 		return -ENOMEM;
 	hose->first_busno = bus_range ? bus_range[0] : 0;
 	hose->last_busno = bus_range ? bus_range[1] : 0xff;
-	setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
+	setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
 
 	/* Interpret the "ranges" property */
 	/* This also maps the I/O region and sets isa_io/mem_base */

arch/powerpc/sysdev/fsl_pci.c

@@ -185,7 +185,8 @@ int __init fsl_add_bridge(struct device_node *dev, int is_primary)
 	hose->first_busno = bus_range ? bus_range[0] : 0x0;
 	hose->last_busno = bus_range ? bus_range[1] : 0xff;
 
-	setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4);
+	setup_indirect_pci(hose, rsrc.start, rsrc.start + 0x4,
+		PPC_INDIRECT_TYPE_BIG_ENDIAN);
 	setup_pci_cmd(hose);
 
 	/* check PCI express link status */

arch/powerpc/sysdev/grackle.c

@@ -55,7 +55,7 @@ static inline void grackle_set_loop_snoop(struct pci_controller *bp, int enable)
 
 void __init setup_grackle(struct pci_controller *hose)
 {
-	setup_indirect_pci(hose, 0xfec00000, 0xfee00000);
+	setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);
 	if (machine_is_compatible("PowerMac1,1"))
 		pci_assign_all_buses = 1;
 	if (machine_is_compatible("AAPL,PowerBook1998"))

arch/powerpc/sysdev/indirect_pci.c

@@ -20,12 +20,6 @@
 #include <asm/pci-bridge.h>
 #include <asm/machdep.h>
 
-#ifdef CONFIG_PPC_INDIRECT_PCI_BE
-#define PCI_CFG_OUT out_be32
-#else
-#define PCI_CFG_OUT out_le32
-#endif
-
 static int
 indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
 		     int len, u32 *val)
@@ -58,9 +52,12 @@ indirect_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
 	else
 		reg = offset & 0xfc;
 
-	PCI_CFG_OUT(hose->cfg_addr,
-		 (0x80000000 | (bus_no << 16)
-		  | (devfn << 8) | reg | cfg_type));
+	if (hose->indirect_type & PPC_INDIRECT_TYPE_BIG_ENDIAN)
+		out_be32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+			 (devfn << 8) | reg | cfg_type));
+	else
+		out_le32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+			 (devfn << 8) | reg | cfg_type));
 
 	/*
 	 * Note: the caller has already checked that offset is
@@ -113,9 +110,12 @@ indirect_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
 	else
 		reg = offset & 0xfc;
 
-	PCI_CFG_OUT(hose->cfg_addr,
-		 (0x80000000 | (bus_no << 16)
-		  | (devfn << 8) | reg | cfg_type));
+	if (hose->indirect_type & PPC_INDIRECT_TYPE_BIG_ENDIAN)
+		out_be32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+			 (devfn << 8) | reg | cfg_type));
+	else
+		out_le32(hose->cfg_addr, (0x80000000 | (bus_no << 16) |
+			 (devfn << 8) | reg | cfg_type));
 
 	/* surpress setting of PCI_PRIMARY_BUS */
 	if (hose->indirect_type & PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS)
@@ -149,7 +149,7 @@ static struct pci_ops indirect_pci_ops =
 };
 
 void __init
-setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
+setup_indirect_pci(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data, u32 flags)
 {
 	unsigned long base = cfg_addr & PAGE_MASK;
 	void __iomem *mbase;

arch/powerpc/sysdev/mv64x60_pci.c

@@ -144,7 +144,7 @@ static int __init mv64x60_add_bridge(struct device_node *dev)
 	hose->first_busno = bus_range ? bus_range[0] : 0;
 	hose->last_busno = bus_range ? bus_range[1] : 0xff;
 
-	setup_indirect_pci(hose, rsrc.start, rsrc.start + 4);
+	setup_indirect_pci(hose, rsrc.start, rsrc.start + 4, 0);
 	hose->self_busno = hose->first_busno;
 
 	printk(KERN_INFO "Found MV64x60 PCI host bridge at 0x%016llx. "

include/asm-powerpc/pci-bridge.h

@@ -49,11 +49,13 @@ struct pci_controller {
 	 *   hanging if we don't have link and try to do config cycles to
 	 *   anything but the PHB.  Only allow talking to the PHB if this is
 	 *   set.
+	 *  BIG_ENDIAN - cfg_addr is a big endian register
 	 */
 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE		(0x00000001)
 #define PPC_INDIRECT_TYPE_EXT_REG		(0x00000002)
 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS	(0x00000004)
 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK		(0x00000008)
+#define PPC_INDIRECT_TYPE_BIG_ENDIAN		(0x00000010)
 	u32 indirect_type;
 
 	/* Currently, we limit ourselves to 1 IO range and 3 mem
@@ -88,7 +90,7 @@ extern int early_find_capability(struct pci_controller *hose, int bus,
 				 int dev_fn, int cap);
 
 extern void setup_indirect_pci(struct pci_controller* hose,
-			       u32 cfg_addr, u32 cfg_data);
+			       u32 cfg_addr, u32 cfg_data, u32 flags);
 extern void setup_grackle(struct pci_controller *hose);
 
 #else