1 files changed, 79 insertions, 0 deletions

diff --git a/arch/mips/pci/pci-ddb5074.c b/arch/mips/pci/pci-ddb5074.c
new file mode 100644
index 000000000000..73f9ceeb2f55
--- /dev/null
+++ b/arch/mips/pci/pci-ddb5074.c
@@ -0,0 +1,79 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+
+#include <asm/debug.h>
+
+#include <asm/ddb5xxx/ddb5xxx.h>
+
+static struct resource extpci_io_resource = {
+        "pci IO space",
+        0x1000,                 /* leave some room for ISA bus */
+        DDB_PCI_IO_SIZE - 1,
+        IORESOURCE_IO
+};
+
+static struct resource extpci_mem_resource = {
+        "pci memory space",
+        DDB_PCI_MEM_BASE + 0x00100000,  /* leave 1 MB for RTC */
+        DDB_PCI_MEM_BASE + DDB_PCI_MEM_SIZE - 1,
+        IORESOURCE_MEM
+};
+
+extern struct pci_ops ddb5476_ext_pci_ops;
+
+struct pci_controller ddb5476_controller = {
+        .pci_ops        = &ddb5476_ext_pci_ops,
+        .io_resource    = &extpci_io_resource,
+        .mem_resource   = &extpci_mem_resource,
+};
+
+#define     PCI_EXT_INTA        8
+#define     PCI_EXT_INTB        9
+#define     PCI_EXT_INTC        10
+#define     PCI_EXT_INTD        11
+#define     PCI_EXT_INTE        12
+
+#define     MAX_SLOT_NUM        14
+
+static unsigned char irq_map[MAX_SLOT_NUM] = {
+  [ 0] = nile4_to_irq(PCI_EXT_INTE),
+  [ 1] = nile4_to_irq(PCI_EXT_INTA),
+  [ 2] = nile4_to_irq(PCI_EXT_INTA),
+  [ 3] = nile4_to_irq(PCI_EXT_INTB),
+  [ 4] = nile4_to_irq(PCI_EXT_INTC),
+  [ 5] = nile4_to_irq(NILE4_INT_UART),
+  [10] = nile4_to_irq(PCI_EXT_INTE),
+  [13] = nile4_to_irq(PCI_EXT_INTE),
+};
+
+int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
+{
+        return irq_map[slot];
+}
+
+/* Do platform specific device initialization at pci_enable_device() time */
+int pcibios_plat_dev_init(struct pci_dev *dev)
+{
+        return 0;
+}
+
+void __init ddb_pci_reset_bus(void)
+{
+        u32 temp;
+
+        /*
+         * I am not sure about the "official" procedure, the following
+         * steps work as far as I know:
+         * We first set PCI cold reset bit (bit 31) in PCICTRL-H.
+         * Then we clear the PCI warm reset bit (bit 30) to 0 in PCICTRL-H.
+         * The same is true for both PCI channels.
+         */
+        temp = ddb_in32(DDB_PCICTRL + 4);
+        temp |= 0x80000000;
+        ddb_out32(DDB_PCICTRL + 4, temp);
+        temp &= ~0xc0000000;
+        ddb_out32(DDB_PCICTRL + 4, temp);
+
+}