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