include/linux/ioport.h

   1 /*
   2  * ioport.h     Definitions of routines for detecting, reserving and
   3  *              allocating system resources.
   4  *
   5  * Authors:     Linus Torvalds
   6  */
   7
   8 #ifndef _LINUX_IOPORT_H
   9 #define _LINUX_IOPORT_H
  10
  11 #include <linux/compiler.h>
  12 /*
  13  * Resources are tree-like, allowing
  14  * nesting etc..
  15  */
  16 struct resource {
  17         const char *name;
  18         unsigned long start, end;
  19         unsigned long flags;
  20         struct resource *parent, *sibling, *child;
  21 };
  22
  23 struct resource_list {
  24         struct resource_list *next;
  25         struct resource *res;
  26         struct pci_dev *dev;
  27 };
  28
  29 /*
  30  * IO resources have these defined flags.
  31  */
  32 #define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  33
  34 #define IORESOURCE_IO           0x00000100      /* Resource type */
  35 #define IORESOURCE_MEM          0x00000200
  36 #define IORESOURCE_IRQ          0x00000400
  37 #define IORESOURCE_DMA          0x00000800
  38
  39 #define IORESOURCE_PREFETCH     0x00001000      /* No side effects */
  40 #define IORESOURCE_READONLY     0x00002000
  41 #define IORESOURCE_CACHEABLE    0x00004000
  42 #define IORESOURCE_RANGELENGTH  0x00008000
  43 #define IORESOURCE_SHADOWABLE   0x00010000
  44 #define IORESOURCE_BUS_HAS_VGA  0x00080000
  45
  46 #define IORESOURCE_DISABLED     0x10000000
  47 #define IORESOURCE_UNSET        0x20000000
  48 #define IORESOURCE_AUTO         0x40000000
  49 #define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  50
  51 /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
  52 #define IORESOURCE_IRQ_HIGHEDGE         (1<<0)
  53 #define IORESOURCE_IRQ_LOWEDGE          (1<<1)
  54 #define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)
  55 #define IORESOURCE_IRQ_LOWLEVEL         (1<<3)
  56
  57 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */
  58 #define IORESOURCE_DMA_TYPE_MASK        (3<<0)
  59 #define IORESOURCE_DMA_8BIT             (0<<0)
  60 #define IORESOURCE_DMA_8AND16BIT        (1<<0)
  61 #define IORESOURCE_DMA_16BIT            (2<<0)
  62
  63 #define IORESOURCE_DMA_MASTER           (1<<2)
  64 #define IORESOURCE_DMA_BYTE             (1<<3)
  65 #define IORESOURCE_DMA_WORD             (1<<4)
  66
  67 #define IORESOURCE_DMA_SPEED_MASK       (3<<6)
  68 #define IORESOURCE_DMA_COMPATIBLE       (0<<6)
  69 #define IORESOURCE_DMA_TYPEA            (1<<6)
  70 #define IORESOURCE_DMA_TYPEB            (2<<6)
  71 #define IORESOURCE_DMA_TYPEF            (3<<6)
  72
  73 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
  74 #define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */
  75 #define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */
  76 #define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */
  77 #define IORESOURCE_MEM_TYPE_MASK        (3<<3)
  78 #define IORESOURCE_MEM_8BIT             (0<<3)
  79 #define IORESOURCE_MEM_16BIT            (1<<3)
  80 #define IORESOURCE_MEM_8AND16BIT        (2<<3)
  81 #define IORESOURCE_MEM_32BIT            (3<<3)
  82 #define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */
  83 #define IORESOURCE_MEM_EXPANSIONROM     (1<<6)
  84
  85 /* PCI ROM control bits (IORESOURCE_BITS) */
  86 #define IORESOURCE_ROM_ENABLE           (1<<0)  /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
  87 #define IORESOURCE_ROM_SHADOW           (1<<1)  /* ROM is copy at C000:0 */
  88 #define IORESOURCE_ROM_COPY             (1<<2)  /* ROM is alloc'd copy, resource field overlaid */
  89
  90 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  91 extern struct resource ioport_resource;
  92 extern struct resource iomem_resource;
  93
  94 extern int request_resource(struct resource *root, struct resource *new);
  95 extern struct resource * ____request_resource(struct resource *root, struct resource *new);
  96 extern int release_resource(struct resource *new);
  97 extern int insert_resource(struct resource *parent, struct resource *new);
  98 extern int allocate_resource(struct resource *root, struct resource *new,
  99                              unsigned long size,
 100                              unsigned long min, unsigned long max,
 101                              unsigned long align,
 102                              void (*alignf)(void *, struct resource *,
 103                                             unsigned long, unsigned long),
 104                              void *alignf_data);
 105 int adjust_resource(struct resource *res, unsigned long start,
 106                     unsigned long size);
 107
 108 /* Convenience shorthand with allocation */
 109 #define request_region(start,n,name)    __request_region(&ioport_resource, (start), (n), (name))
 110 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
 111 #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
 112
 113 extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
 114
 115 /* Compatibility cruft */
 116 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
 117 #define check_mem_region(start,n)       __check_region(&iomem_resource, (start), (n))
 118 #define release_mem_region(start,n)     __release_region(&iomem_resource, (start), (n))
 119
 120 extern int __check_region(struct resource *, unsigned long, unsigned long);
 121 extern void __release_region(struct resource *, unsigned long, unsigned long);
 122
 123 static inline int __deprecated check_region(unsigned long s, unsigned long n)
 124 {
 125         return __check_region(&ioport_resource, s, n);
 126 }
 127 #endif  /* _LINUX_IOPORT_H */