1 files changed, 83 insertions, 0 deletions

diff --git a/arch/mips/loongson/common/pci.c b/arch/mips/loongson/common/pci.c
new file mode 100644
index 000000000000..a3a4abfb6c9a
--- /dev/null
+++ b/arch/mips/loongson/common/pci.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
+ * Author: Fuxin Zhang, zhangfx@lemote.com
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ */
+#include <linux/pci.h>
+
+#include <pci.h>
+#include <loongson.h>
+
+static struct resource loongson_pci_mem_resource = {
+        .name   = "pci memory space",
+        .start  = LOONGSON_PCI_MEM_START,
+        .end    = LOONGSON_PCI_MEM_END,
+        .flags  = IORESOURCE_MEM,
+};
+
+static struct resource loongson_pci_io_resource = {
+        .name   = "pci io space",
+        .start  = LOONGSON_PCI_IO_START,
+        .end    = IO_SPACE_LIMIT,
+        .flags  = IORESOURCE_IO,
+};
+
+static struct pci_controller  loongson_pci_controller = {
+        .pci_ops        = &bonito64_pci_ops,
+        .io_resource    = &loongson_pci_io_resource,
+        .mem_resource   = &loongson_pci_mem_resource,
+        .mem_offset     = 0x00000000UL,
+        .io_offset      = 0x00000000UL,
+};
+
+static void __init setup_pcimap(void)
+{
+        /*
+         * local to PCI mapping for CPU accessing PCI space
+         * CPU address space [256M,448M] is window for accessing pci space
+         * we set pcimap_lo[0,1,2] to map it to pci space[0M,64M], [320M,448M]
+         *
+         * pcimap: PCI_MAP2  PCI_Mem_Lo2 PCI_Mem_Lo1 PCI_Mem_Lo0
+         *           [<2G]   [384M,448M] [320M,384M] [0M,64M]
+         */
+        BONITO_PCIMAP = BONITO_PCIMAP_PCIMAP_2 |
+                BONITO_PCIMAP_WIN(2, BONITO_PCILO2_BASE) |
+                BONITO_PCIMAP_WIN(1, BONITO_PCILO1_BASE) |
+                BONITO_PCIMAP_WIN(0, 0);
+
+        /*
+         * PCI-DMA to local mapping: [2G,2G+256M] -> [0M,256M]
+         */
+        BONITO_PCIBASE0 = 0x80000000ul;   /* base: 2G -> mmap: 0M */
+        /* size: 256M, burst transmission, pre-fetch enable, 64bit */
+        LOONGSON_PCI_HIT0_SEL_L = 0xc000000cul;
+        LOONGSON_PCI_HIT0_SEL_H = 0xfffffffful;
+        LOONGSON_PCI_HIT1_SEL_L = 0x00000006ul; /* set this BAR as invalid */
+        LOONGSON_PCI_HIT1_SEL_H = 0x00000000ul;
+        LOONGSON_PCI_HIT2_SEL_L = 0x00000006ul; /* set this BAR as invalid */
+        LOONGSON_PCI_HIT2_SEL_H = 0x00000000ul;
+
+        /* avoid deadlock of PCI reading/writing lock operation */
+        LOONGSON_PCI_ISR4C = 0xd2000001ul;
+
+        /* can not change gnt to break pci transfer when device's gnt not
+        deassert for some broken device */
+        LOONGSON_PXARB_CFG = 0x00fe0105ul;
+}
+
+static int __init pcibios_init(void)
+{
+        setup_pcimap();
+
+        loongson_pci_controller.io_map_base = mips_io_port_base;
+
+        register_pci_controller(&loongson_pci_controller);
+
+        return 0;
+}
+
+arch_initcall(pcibios_init);