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 #ifndef __ASSEMBLY__
12 #include <linux/compiler.h>
13 #include <linux/types.h>
14 /*
15 * Resources are tree-like, allowing
16 * nesting etc..
17 */
18 struct resource {
19 resource_size_t start;
20 resource_size_t end;
21 const char *name;
22 unsigned long flags;
23 struct resource *parent, *sibling, *child;
24 };
25
26 struct resource_list {
27 struct resource_list *next;
28 struct resource *res;
29 struct pci_dev *dev;
30 };
31
32 /*
33 * IO resources have these defined flags.
34 */
35 #define IORESOURCE_BITS 0x000000ff /* Bus-specific bits */
36
37 #define IORESOURCE_IO 0x00000100 /* Resource type */
38 #define IORESOURCE_MEM 0x00000200
39 #define IORESOURCE_IRQ 0x00000400
40 #define IORESOURCE_DMA 0x00000800
41
42 #define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
43 #define IORESOURCE_READONLY 0x00002000
44 #define IORESOURCE_CACHEABLE 0x00004000
45 #define IORESOURCE_RANGELENGTH 0x00008000
46 #define IORESOURCE_SHADOWABLE 0x00010000
47 #define IORESOURCE_BUS_HAS_VGA 0x00080000
48
49 #define IORESOURCE_DISABLED 0x10000000
50 #define IORESOURCE_UNSET 0x20000000
51 #define IORESOURCE_AUTO 0x40000000
52 #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */
53
54 /* ISA PnP IRQ specific bits (IORESOURCE_BITS) */
55 #define IORESOURCE_IRQ_HIGHEDGE (1<<0)
56 #define IORESOURCE_IRQ_LOWEDGE (1<<1)
57 #define IORESOURCE_IRQ_HIGHLEVEL (1<<2)
58 #define IORESOURCE_IRQ_LOWLEVEL (1<<3)
59 #define IORESOURCE_IRQ_SHAREABLE (1<<4)
60
61 /* ISA PnP DMA specific bits (IORESOURCE_BITS) */
62 #define IORESOURCE_DMA_TYPE_MASK (3<<0)
63 #define IORESOURCE_DMA_8BIT (0<<0)
64 #define IORESOURCE_DMA_8AND16BIT (1<<0)
65 #define IORESOURCE_DMA_16BIT (2<<0)
66
67 #define IORESOURCE_DMA_MASTER (1<<2)
68 #define IORESOURCE_DMA_BYTE (1<<3)
69 #define IORESOURCE_DMA_WORD (1<<4)
70
71 #define IORESOURCE_DMA_SPEED_MASK (3<<6)
72 #define IORESOURCE_DMA_COMPATIBLE (0<<6)
73 #define IORESOURCE_DMA_TYPEA (1<<6)
74 #define IORESOURCE_DMA_TYPEB (2<<6)
75 #define IORESOURCE_DMA_TYPEF (3<<6)
76
77 /* ISA PnP memory I/O specific bits (IORESOURCE_BITS) */
78 #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */
79 #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */
80 #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */
81 #define IORESOURCE_MEM_TYPE_MASK (3<<3)
82 #define IORESOURCE_MEM_8BIT (0<<3)
83 #define IORESOURCE_MEM_16BIT (1<<3)
84 #define IORESOURCE_MEM_8AND16BIT (2<<3)
85 #define IORESOURCE_MEM_32BIT (3<<3)
86 #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */
87 #define IORESOURCE_MEM_EXPANSIONROM (1<<6)
88
89 /* PCI ROM control bits (IORESOURCE_BITS) */
90 #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */
91 #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */
92 #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */
93 #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */
94
95 /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */
96 #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */
97
98 /* PC/ISA/whatever - the normal PC address spaces: IO and memory */
99 extern struct resource ioport_resource;
100 extern struct resource iomem_resource;
101
102 extern int request_resource(struct resource *root, struct resource *new);
103 extern int release_resource(struct resource *new);
104 extern int insert_resource(struct resource *parent, struct resource *new);
105 extern int allocate_resource(struct resource *root, struct resource *new,
106 resource_size_t size, resource_size_t min,
107 resource_size_t max, resource_size_t align,
108 void (*alignf)(void *, struct resource *,
109 resource_size_t, resource_size_t),
110 void *alignf_data);
111 int adjust_resource(struct resource *res, resource_size_t start,
112 resource_size_t size);
113
114 /* Convenience shorthand with allocation */
115 #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
116 #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))
117 #define rename_region(region, newname) do { (region)->name = (newname); } while (0)
118
119 extern struct resource * __request_region(struct resource *,
120 resource_size_t start,
121 resource_size_t n, const char *name);
122
123 /* Compatibility cruft */
124 #define release_region(start,n) __release_region(&ioport_resource, (start), (n))
125 #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n))
126 #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n))
127
128 extern int __check_region(struct resource *, resource_size_t, resource_size_t);
129 extern void __release_region(struct resource *, resource_size_t,
130 resource_size_t);
131
132 static inline int __deprecated check_region(resource_size_t s,
133 resource_size_t n)
134 {
135 return __check_region(&ioport_resource, s, n);
136 }
137
138 /* Wrappers for managed devices */
139 struct device;
140 #define devm_request_region(dev,start,n,name) \
141 __devm_request_region(dev, &ioport_resource, (start), (n), (name))
142 #define devm_request_mem_region(dev,start,n,name) \
143 __devm_request_region(dev, &iomem_resource, (start), (n), (name))
144
145 extern struct resource * __devm_request_region(struct device *dev,
146 struct resource *parent, resource_size_t start,
147 resource_size_t n, const char *name);
148
149 #define devm_release_region(start,n) \
150 __devm_release_region(dev, &ioport_resource, (start), (n))
151 #define devm_release_mem_region(start,n) \
152 __devm_release_region(dev, &iomem_resource, (start), (n))
153
154 extern void __devm_release_region(struct device *dev, struct resource *parent,
155 resource_size_t start, resource_size_t n);
156
157 #endif /* __ASSEMBLY__ */
158 #endif /* _LINUX_IOPORT_H */
159
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