target/linux/adm5120-2.6/files/arch/mips/pci/pci-adm5120.c

   1 /*
   2  *      Copyright (C) ADMtek Incorporated.
   3  *      Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
   4  */
   5
   6 #include <linux/autoconf.h>
   7 #include <linux/types.h>
   8 #include <linux/pci.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11
  12 extern struct pci_ops adm5120_pci_ops;
  13
  14 #define ADM5120_CODE            0x12000000
  15 #define ADM5120_CODE_PQFP       0x20000000
  16
  17 #define PCI_CMM_IOACC_EN        0x1
  18 #define PCI_CMM_MEMACC_EN       0x2
  19 #define PCI_CMM_MASTER_EN       0x4
  20 #define PCI_CMM_DEF \
  21                 (PCI_CMM_IOACC_EN | PCI_CMM_MEMACC_EN | PCI_CMM_MASTER_EN)
  22
  23 #define PCI_DEF_CACHE_LINE_SZ   4
  24
  25
  26 struct resource pci_io_resource = {
  27         "PCI IO space",
  28         0x11500000,
  29         0x115ffff0-1,
  30         IORESOURCE_IO
  31 };
  32
  33 struct resource pci_mem_resource = {
  34         "PCI memory space",
  35         0x11400000,
  36         0x11500000,
  37         IORESOURCE_MEM
  38 };
  39
  40 static struct pci_controller adm5120_controller = {
  41         .pci_ops        = &adm5120_pci_ops,
  42         .io_resource    = &pci_io_resource,
  43         .mem_resource   = &pci_mem_resource,
  44 };
  45
  46 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  47 {
  48         if (slot < 2 || slot > 4)
  49                 return -1;
  50         return slot + 4;
  51 }
  52
  53 static void adm5120_pci_fixup(struct pci_dev *dev)
  54 {
  55         if (dev->devfn == 0) {
  56                 pci_write_config_word(dev, PCI_COMMAND, PCI_CMM_DEF);
  57                 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
  58                     PCI_DEF_CACHE_LINE_SZ);
  59                 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0);
  60                 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
  61         }
  62 }
  63
  64 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, adm5120_pci_fixup);
  65
  66
  67 int pcibios_plat_dev_init(struct pci_dev *dev)
  68 {
  69         return 0;
  70 }
  71
  72 static int __init adm5120_pci_setup(void)
  73 {
  74
  75         if ((*(volatile u32 *)(KSEG1ADDR(ADM5120_CODE))) & ADM5120_CODE_PQFP) {
  76                 printk("System has no PCI BIOS\n");
  77                 return 1;
  78         }
  79         printk("System has PCI BIOS\n");
  80
  81         /* Avoid ISA compat ranges.  */
  82         PCIBIOS_MIN_IO = 0x00000000;
  83         PCIBIOS_MIN_MEM = 0x00000000;
  84
  85         /* Set I/O resource limits.  */
  86         ioport_resource.end = 0x1fffffff;
  87         iomem_resource.end = 0xffffffff;
  88
  89         register_pci_controller(&adm5120_controller);
  90         return 0;
  91 }
  92
  93 subsys_initcall(adm5120_pci_setup);