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  *      Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu>
   5  *      Copyright (C) 2007 OpenWrt.org
   6  */
   7
   8 #include <linux/autoconf.h>
   9 #include <linux/types.h>
  10 #include <linux/pci.h>
  11 #include <linux/kernel.h>
  12 #include <linux/init.h>
  13
  14 #include <adm5120_info.h>
  15 #include <adm5120_defs.h>
  16
  17 extern struct pci_ops adm5120_pci_ops;
  18
  19 #define PCI_CMM_IOACC_EN        0x1
  20 #define PCI_CMM_MEMACC_EN       0x2
  21 #define PCI_CMM_MASTER_EN       0x4
  22 #define PCI_CMM_DEF \
  23                 (PCI_CMM_IOACC_EN | PCI_CMM_MEMACC_EN | PCI_CMM_MASTER_EN)
  24
  25 #define PCI_DEF_CACHE_LINE_SZ   4
  26
  27
  28 struct resource pci_io_resource = {
  29         .name = "ADM5120 PCI I/O",
  30         .start = ADM5120_PCIIO_BASE,
  31         .end = ADM5120_PCICFG_ADDR-1,
  32         .flags = IORESOURCE_IO
  33 };
  34
  35 struct resource pci_mem_resource = {
  36         .name = "ADM5120 PCI MEM",
  37         .start = ADM5120_PCIMEM_BASE,
  38         .end = ADM5120_PCIIO_BASE-1,
  39         .flags = IORESOURCE_MEM
  40 };
  41
  42 static struct pci_controller adm5120_controller = {
  43         .pci_ops        = &adm5120_pci_ops,
  44         .io_resource    = &pci_io_resource,
  45         .mem_resource   = &pci_mem_resource,
  46 };
  47
  48 int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
  49 {
  50         if (slot < 2 || slot > 4)
  51                 return -1;
  52         return slot + 4;
  53 }
  54
  55 static void adm5120_pci_fixup(struct pci_dev *dev)
  56 {
  57         if (dev->devfn == 0) {
  58                 pci_write_config_word(dev, PCI_COMMAND, PCI_CMM_DEF);
  59                 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE,
  60                     PCI_DEF_CACHE_LINE_SZ);
  61                 pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0);
  62                 pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
  63         }
  64 }
  65
  66 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, adm5120_pci_fixup);
  67
  68
  69 int pcibios_plat_dev_init(struct pci_dev *dev)
  70 {
  71         return 0;
  72 }
  73
  74 static int __init adm5120_pci_setup(void)
  75 {
  76         int pci_bios;
  77
  78         pci_bios = adm5120_has_pci();
  79
  80         printk("adm5120: system has %sPCI BIOS\n", pci_bios ? "" : "no ");
  81         if (pci_bios == 0)
  82                 return 1;
  83
  84         /* Avoid ISA compat ranges.  */
  85         PCIBIOS_MIN_IO = 0x00000000;
  86         PCIBIOS_MIN_MEM = 0x00000000;
  87
  88         /* Set I/O resource limits.  */
  89         ioport_resource.end = 0x1fffffff;
  90         iomem_resource.end = 0xffffffff;
  91
  92         register_pci_controller(&adm5120_controller);
  93         return 0;
  94 }
  95
  96 subsys_initcall(adm5120_pci_setup);