sh: Consolidated SH7751/SH7780 PCI support.

This cleans up quite a lot of the PCI mess that we
currently have, and attempts to consolidate the
duplication in the SH7780 and SH7751 PCI controllers.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 33 insertions, 7 deletions

diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
index 285dffd12bd8..7377a8a8e161 100644
--- a/arch/sh/drivers/pci/pci.c
+++ b/arch/sh/drivers/pci/pci.c
@@ -21,6 +21,26 @@
 #include <linux/init.h>
 #include <asm/io.h>
 
+static inline u8 bridge_swizzle(u8 pin, u8 slot)
+{
+        return (((pin - 1) + slot) % 4) + 1;
+}
+
+static u8 __init simple_swizzle(struct pci_dev *dev, u8 *pinp)
+{
+        u8 pin = *pinp;
+
+        while (dev->bus->parent) {
+                pin = bridge_swizzle(pin, PCI_SLOT(dev->devfn));
+                /* Move up the chain of bridges. */
+                dev = dev->bus->self;
+        }
+        *pinp = pin;
+
+        /* The slot is the slot of the last bridge. */
+        return PCI_SLOT(dev->devfn);
+}
+
 static int __init pcibios_init(void)
 {
         struct pci_channel *p;
@@ -36,19 +56,26 @@ static int __init pcibios_init(void)
 
         /* scan the buses */
         busno = 0;
-        for (p= board_pci_channels; p->pci_ops != NULL; p++) {
+        for (p = board_pci_channels; p->pci_ops != NULL; p++) {
                 bus = pci_scan_bus(busno, p->pci_ops, p);
-                busno = bus->subordinate+1;
+                busno = bus->subordinate + 1;
         }
 
-        /* board-specific fixups */
-        pcibios_fixup_irqs();
+        pci_fixup_irqs(simple_swizzle, pcibios_map_platform_irq);
 
         return 0;
 }
-
 subsys_initcall(pcibios_init);
 
+/*
+ *  Called after each bus is probed, but before its children
+ *  are examined.
+ */
+void __init pcibios_fixup_bus(struct pci_bus *bus)
+{
+        pci_read_bridge_bases(bus);
+}
+
 void
 pcibios_update_resource(struct pci_dev *dev, struct resource *root,
                         struct resource *res, int resource)
@@ -192,11 +219,10 @@ void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
 
         return NULL;
 }
+EXPORT_SYMBOL(pci_iomap);
 
 void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
 {
         iounmap(addr);
 }
-
-EXPORT_SYMBOL(pci_iomap);
 EXPORT_SYMBOL(pci_iounmap);