target/linux/adm5120-2.6/files/arch/mips/pci/ops-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 volatile u32* pci_config_address_reg = (volatile u32*)KSEG1ADDR(0x115ffff0);
  13 volatile u32* pci_config_data_reg = (volatile u32*)KSEG1ADDR(0x115ffff8);
  14
  15 #define PCI_ENABLE 0x80000000
  16
  17 static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where,
  18                            int size, uint32_t *val)
  19 {
  20         *pci_config_address_reg = ((bus->number & 0xff) << 0x10) |
  21             ((devfn & 0xff) << 0x08) | (where & 0xfc) | PCI_ENABLE;
  22         switch (size) {
  23                 case 1:
  24                         *val = ((*pci_config_data_reg)>>((where&3)<<3))&0xff;
  25                         break;
  26                 case 2:
  27                         *val = ((*pci_config_data_reg)>>((where&3)<<3))&0xffff;
  28                         break;
  29                 default:
  30                         *val = (*pci_config_data_reg);
  31         }
  32         return PCIBIOS_SUCCESSFUL;
  33 }
  34
  35 static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where,
  36                             int size, uint32_t val)
  37 {
  38         *pci_config_address_reg = ((bus->number & 0xff) << 0x10) |
  39             ((devfn & 0xff) << 0x08) | (where & 0xfc) | PCI_ENABLE;
  40         switch (size) {
  41                 case 1:
  42                         *(volatile u8 *)(((int)pci_config_data_reg) +
  43                             (where & 3)) = val;
  44                         break;
  45                 case 2:
  46                         *(volatile u16 *)(((int)pci_config_data_reg) +
  47                             (where & 2)) = (val);
  48                         break;
  49                 default:
  50                         *pci_config_data_reg = (val);
  51         }
  52
  53         return PCIBIOS_SUCCESSFUL;
  54 }
  55
  56 struct pci_ops adm5120_pci_ops = {
  57         .read   = pci_config_read,
  58         .write  = pci_config_write,
  59 };