LXR linux/arch/mips/include/asm/pci.h

   1/*
   2 * This file is subject to the terms and conditions of the GNU General Public
   3 * License.  See the file "COPYING" in the main directory of this archive
   4 * for more details.
   5 */
   6#ifndef _ASM_PCI_H
   7#define _ASM_PCI_H
   8
   9#include <linux/mm.h>
  10
  11#ifdef __KERNEL__
  12
  13/*
  14 * This file essentially defines the interface between board
  15 * specific PCI code and MIPS common PCI code.  Should potentially put
  16 * into include/asm/pci.h file.
  17 */
  18
  19#include <linux/ioport.h>
  20#include <linux/list.h>
  21#include <linux/of.h>
  22
  23#ifdef CONFIG_PCI_DRIVERS_LEGACY
  24
  25/*
  26 * Each pci channel is a top-level PCI bus seem by CPU.  A machine  with
  27 * multiple PCI channels may have multiple PCI host controllers or a
  28 * single controller supporting multiple channels.
  29 */
  30struct pci_controller {
  31        struct list_head list;
  32        struct pci_bus *bus;
  33        struct device_node *of_node;
  34
  35        struct pci_ops *pci_ops;
  36        struct resource *mem_resource;
  37        unsigned long mem_offset;
  38        struct resource *io_resource;
  39        unsigned long io_offset;
  40        unsigned long io_map_base;
  41
  42#ifndef CONFIG_PCI_DOMAINS_GENERIC
  43        unsigned int index;
  44        /* For compatibility with current (as of July 2003) pciutils
  45           and XFree86. Eventually will be removed. */
  46        unsigned int need_domain_info;
  47#endif
  48
  49        /* Optional access methods for reading/writing the bus number
  50           of the PCI controller */
  51        int (*get_busno)(void);
  52        void (*set_busno)(int busno);
  53};
  54
  55/*
  56 * Used by boards to register their PCI busses before the actual scanning.
  57 */
  58extern void register_pci_controller(struct pci_controller *hose);
  59
  60/*
  61 * board supplied pci irq fixup routine
  62 */
  63extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
  64
  65/* Do platform specific device initialization at pci_enable_device() time */
  66extern int pcibios_plat_dev_init(struct pci_dev *dev);
  67
  68extern char * (*pcibios_plat_setup)(char *str);
  69
  70#ifdef CONFIG_OF
  71/* this function parses memory ranges from a device node */
  72extern void pci_load_of_ranges(struct pci_controller *hose,
  73                               struct device_node *node);
  74#else
  75static inline void pci_load_of_ranges(struct pci_controller *hose,
  76                                      struct device_node *node) {}
  77#endif
  78
  79#ifdef CONFIG_PCI_DOMAINS_GENERIC
  80static inline void set_pci_need_domain_info(struct pci_controller *hose,
  81                                            int need_domain_info)
  82{
  83        /* nothing to do */
  84}
  85#elif defined(CONFIG_PCI_DOMAINS)
  86static inline void set_pci_need_domain_info(struct pci_controller *hose,
  87                                            int need_domain_info)
  88{
  89        hose->need_domain_info = need_domain_info;
  90}
  91#endif /* CONFIG_PCI_DOMAINS */
  92
  93#endif
  94
  95/* Can be used to override the logic in pci_scan_bus for skipping
  96   already-configured bus numbers - to be used for buggy BIOSes
  97   or architectures with incomplete PCI setup by the loader */
  98static inline unsigned int pcibios_assign_all_busses(void)
  99{
 100        return 1;
 101}
 102
 103extern unsigned long PCIBIOS_MIN_IO;
 104extern unsigned long PCIBIOS_MIN_MEM;
 105
 106#define PCIBIOS_MIN_CARDBUS_IO  0x4000
 107
 108#define HAVE_PCI_MMAP
 109#define ARCH_GENERIC_PCI_MMAP_RESOURCE
 110
 111/*
 112 * Dynamic DMA mapping stuff.
 113 * MIPS has everything mapped statically.
 114 */
 115
 116#include <linux/types.h>
 117#include <linux/slab.h>
 118#include <linux/scatterlist.h>
 119#include <linux/string.h>
 120#include <asm/io.h>
 121
 122#ifdef CONFIG_PCI_DOMAINS_GENERIC
 123static inline int pci_proc_domain(struct pci_bus *bus)
 124{
 125        return pci_domain_nr(bus);
 126}
 127#elif defined(CONFIG_PCI_DOMAINS)
 128#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 129
 130static inline int pci_proc_domain(struct pci_bus *bus)
 131{
 132        struct pci_controller *hose = bus->sysdata;
 133        return hose->need_domain_info;
 134}
 135#endif /* CONFIG_PCI_DOMAINS */
 136
 137#endif /* __KERNEL__ */
 138
 139/* Do platform specific device initialization at pci_enable_device() time */
 140extern int pcibios_plat_dev_init(struct pci_dev *dev);
 141
 142/* Chances are this interrupt is wired PC-style ...  */
 143static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 144{
 145        return channel ? 15 : 14;
 146}
 147
 148#endif /* _ASM_PCI_H */
 149