File: /usr/src/linux/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 */
121