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 /*
  12  * Resources are tree-like, allowing
  13  * nesting etc..
  14  */
  15 struct resource {
  16         const char *name;
  17         unsigned long start, end;
  18         unsigned long flags;
  19         struct resource *parent, *sibling, *child;
  20 };
  21
  22 struct resource_list {
  23         struct resource_list *next;
  24         struct resource *res;
  25         struct pci_dev *dev;
  26 };
  27
  28 /*
  29  * IO resources have these defined flags.
  30  */
  31 #define IORESOURCE_BITS         0x000000ff      /* Bus-specific bits */
  32
  33 #define IORESOURCE_IO           0x00000100      /* Resource type */
  34 #define IORESOURCE_MEM          0x00000200
  35 #define IORESOURCE_IRQ          0x00000400
  36 #define IORESOURCE_DMA          0x00000800
  37
  38 #define IORESOURCE_PREFETCH     0x00001000      /* No side effects */
  39 #define IORESOURCE_READONLY     0x00002000
  40 #define IORESOURCE_CACHEABLE    0x00004000
  41 #define IORESOURCE_RANGELENGTH  0x00008000
  42 #define IORESOURCE_SHADOWABLE   0x00010000
  43 #define IORESOURCE_BUS_HAS_VGA  0x00080000
  44
  45 #define IORESOURCE_UNSET        0x20000000
  46 #define IORESOURCE_AUTO         0x40000000
  47 #define IORESOURCE_BUSY         0x80000000      /* Driver has marked this resource busy */
  48
  49 /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
  50 #define IORESOURCE_IRQ_HIGHEDGE         (1<<0)
  51 #define IORESOURCE_IRQ_LOWEDGE          (1<<1)
  52 #define IORESOURCE_IRQ_HIGHLEVEL        (1<<2)
  53 #define IORESOURCE_IRQ_LOWLEVEL         (1<<3)
  54
  55 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */
  56 #define IORESOURCE_DMA_TYPE_MASK        (3<<0)
  57 #define IORESOURCE_DMA_8BIT             (0<<0)
  58 #define IORESOURCE_DMA_8AND16BIT        (1<<0)
  59 #define IORESOURCE_DMA_16BIT            (2<<0)
  60
  61 #define IORESOURCE_DMA_MASTER           (1<<2)
  62 #define IORESOURCE_DMA_BYTE             (1<<3)
  63 #define IORESOURCE_DMA_WORD             (1<<4)
  64
  65 #define IORESOURCE_DMA_SPEED_MASK       (3<<6)
  66 #define IORESOURCE_DMA_COMPATIBLE       (0<<6)
  67 #define IORESOURCE_DMA_TYPEA            (1<<6)
  68 #define IORESOURCE_DMA_TYPEB            (2<<6)
  69 #define IORESOURCE_DMA_TYPEF            (3<<6)
  70
  71 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
  72 #define IORESOURCE_MEM_WRITEABLE        (1<<0)  /* dup: IORESOURCE_READONLY */
  73 #define IORESOURCE_MEM_CACHEABLE        (1<<1)  /* dup: IORESOURCE_CACHEABLE */
  74 #define IORESOURCE_MEM_RANGELENGTH      (1<<2)  /* dup: IORESOURCE_RANGELENGTH */
  75 #define IORESOURCE_MEM_TYPE_MASK        (3<<3)
  76 #define IORESOURCE_MEM_8BIT             (0<<3)
  77 #define IORESOURCE_MEM_16BIT            (1<<3)
  78 #define IORESOURCE_MEM_8AND16BIT        (2<<3)
  79 #define IORESOURCE_MEM_SHADOWABLE       (1<<5)  /* dup: IORESOURCE_SHADOWABLE */
  80 #define IORESOURCE_MEM_EXPANSIONROM     (1<<6)
  81
  82 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
  83 extern struct resource ioport_resource;
  84 extern struct resource iomem_resource;
  85
  86 extern int get_resource_list(struct resource *, char *buf, int size);
  87
  88 extern int check_resource(struct resource *root, unsigned long, unsigned long);
  89 extern int request_resource(struct resource *root, struct resource *new);
  90 extern int release_resource(struct resource *new);
  91 extern int allocate_resource(struct resource *root, struct resource *new,
  92                              unsigned long size,
  93                              unsigned long min, unsigned long max,
  94                              unsigned long align,
  95                              void (*alignf)(void *, struct resource *, unsigned long),
  96                              void *alignf_data);
  97
  98 /* Convenience shorthand with allocation */
  99 #define request_region(start,n,name)    __request_region(&ioport_resource, (start), (n), (name))
 100 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
 101
 102 extern struct resource * __request_region(struct resource *, unsigned long start, unsigned long n, const char *name);
 103
 104 /* Compatibility cruft */
 105 #define check_region(start,n)   __check_region(&ioport_resource, (start), (n))
 106 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
 107 #define check_mem_region(start,n)       __check_region(&iomem_resource, (start), (n))
 108 #define release_mem_region(start,n)     __release_region(&iomem_resource, (start), (n))
 109
 110 extern int __check_region(struct resource *, unsigned long, unsigned long);
 111 extern void __release_region(struct resource *, unsigned long, unsigned long);
 112
 113 #define get_ioport_list(buf)    get_resource_list(&ioport_resource, buf, PAGE_SIZE)
 114 #define get_mem_list(buf)       get_resource_list(&iomem_resource, buf, PAGE_SIZE)
 115
 116 #define HAVE_AUTOIRQ
 117 extern void autoirq_setup(int waittime);
 118 extern int autoirq_report(int waittime);
 119
 120 #endif  /* _LINUX_IOPORT_H */