arch/mips/lib/iomap-pci.c

   1 /*
   2  * Implement the default iomap interfaces
   3  *
   4  * (C) Copyright 2004 Linus Torvalds
   5  * (C) Copyright 2006 Ralf Baechle <ralf@linux-mips.org>
   6  * (C) Copyright 2007 MIPS Technologies, Inc.
   7  *     written by Ralf Baechle <ralf@linux-mips.org>
   8  */
   9 #include <linux/pci.h>
  10 #include <linux/export.h>
  11 #include <asm/io.h>
  12
  13 #ifdef CONFIG_PCI_DRIVERS_LEGACY
  14
  15 void __iomem *__pci_ioport_map(struct pci_dev *dev,
  16                                unsigned long port, unsigned int nr)
  17 {
  18         struct pci_controller *ctrl = dev->bus->sysdata;
  19         unsigned long base = ctrl->io_map_base;
  20
  21         /* This will eventually become a BUG_ON but for now be gentle */
  22         if (unlikely(!ctrl->io_map_base)) {
  23                 struct pci_bus *bus = dev->bus;
  24                 char name[8];
  25
  26                 while (bus->parent)
  27                         bus = bus->parent;
  28
  29                 ctrl->io_map_base = base = mips_io_port_base;
  30
  31                 sprintf(name, "%04x:%02x", pci_domain_nr(bus), bus->number);
  32                 printk(KERN_WARNING "io_map_base of root PCI bus %s unset.  "
  33                        "Trying to continue but you better\nfix this issue or "
  34                        "report it to linux-mips@linux-mips.org or your "
  35                        "vendor.\n", name);
  36 #ifdef CONFIG_PCI_DOMAINS
  37                 panic("To avoid data corruption io_map_base MUST be set with "
  38                       "multiple PCI domains.");
  39 #endif
  40         }
  41
  42         return (void __iomem *) (ctrl->io_map_base + port);
  43 }
  44
  45 #endif /* CONFIG_PCI_DRIVERS_LEGACY */
  46
  47 void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
  48 {
  49         iounmap(addr);
  50 }
  51
  52 EXPORT_SYMBOL(pci_iounmap);