Commit | Line | Data |
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1da177e4 LT |
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 | ||
c9cce83d | 11 | #ifndef __ASSEMBLY__ |
1da177e4 | 12 | #include <linux/compiler.h> |
cf7c712c | 13 | #include <linux/types.h> |
1da177e4 LT |
14 | /* |
15 | * Resources are tree-like, allowing | |
16 | * nesting etc.. | |
17 | */ | |
18 | struct resource { | |
cf7c712c GKH |
19 | resource_size_t start; |
20 | resource_size_t end; | |
1da177e4 | 21 | const char *name; |
1da177e4 LT |
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 | |
88452565 IK |
47 | |
48 | #define IORESOURCE_SIZEALIGN 0x00020000 /* size indicates alignment */ | |
49 | #define IORESOURCE_STARTALIGN 0x00040000 /* start field is alignment */ | |
1da177e4 LT |
50 | |
51 | #define IORESOURCE_DISABLED 0x10000000 | |
52 | #define IORESOURCE_UNSET 0x20000000 | |
53 | #define IORESOURCE_AUTO 0x40000000 | |
54 | #define IORESOURCE_BUSY 0x80000000 /* Driver has marked this resource busy */ | |
55 | ||
e9fe9e18 | 56 | /* PnP IRQ specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
57 | #define IORESOURCE_IRQ_HIGHEDGE (1<<0) |
58 | #define IORESOURCE_IRQ_LOWEDGE (1<<1) | |
59 | #define IORESOURCE_IRQ_HIGHLEVEL (1<<2) | |
60 | #define IORESOURCE_IRQ_LOWLEVEL (1<<3) | |
c32928c5 | 61 | #define IORESOURCE_IRQ_SHAREABLE (1<<4) |
d5ebde6e | 62 | #define IORESOURCE_IRQ_OPTIONAL (1<<5) |
1da177e4 | 63 | |
e9fe9e18 | 64 | /* PnP DMA specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
65 | #define IORESOURCE_DMA_TYPE_MASK (3<<0) |
66 | #define IORESOURCE_DMA_8BIT (0<<0) | |
67 | #define IORESOURCE_DMA_8AND16BIT (1<<0) | |
68 | #define IORESOURCE_DMA_16BIT (2<<0) | |
69 | ||
70 | #define IORESOURCE_DMA_MASTER (1<<2) | |
71 | #define IORESOURCE_DMA_BYTE (1<<3) | |
72 | #define IORESOURCE_DMA_WORD (1<<4) | |
73 | ||
74 | #define IORESOURCE_DMA_SPEED_MASK (3<<6) | |
75 | #define IORESOURCE_DMA_COMPATIBLE (0<<6) | |
76 | #define IORESOURCE_DMA_TYPEA (1<<6) | |
77 | #define IORESOURCE_DMA_TYPEB (2<<6) | |
78 | #define IORESOURCE_DMA_TYPEF (3<<6) | |
79 | ||
e9fe9e18 | 80 | /* PnP memory I/O specific bits (IORESOURCE_BITS) */ |
1da177e4 LT |
81 | #define IORESOURCE_MEM_WRITEABLE (1<<0) /* dup: IORESOURCE_READONLY */ |
82 | #define IORESOURCE_MEM_CACHEABLE (1<<1) /* dup: IORESOURCE_CACHEABLE */ | |
83 | #define IORESOURCE_MEM_RANGELENGTH (1<<2) /* dup: IORESOURCE_RANGELENGTH */ | |
84 | #define IORESOURCE_MEM_TYPE_MASK (3<<3) | |
85 | #define IORESOURCE_MEM_8BIT (0<<3) | |
86 | #define IORESOURCE_MEM_16BIT (1<<3) | |
87 | #define IORESOURCE_MEM_8AND16BIT (2<<3) | |
88 | #define IORESOURCE_MEM_32BIT (3<<3) | |
89 | #define IORESOURCE_MEM_SHADOWABLE (1<<5) /* dup: IORESOURCE_SHADOWABLE */ | |
90 | #define IORESOURCE_MEM_EXPANSIONROM (1<<6) | |
91 | ||
08c9f262 BH |
92 | /* PnP I/O specific bits (IORESOURCE_BITS) */ |
93 | #define IORESOURCE_IO_16BIT_ADDR (1<<0) | |
94 | #define IORESOURCE_IO_FIXED (1<<1) | |
95 | ||
1da177e4 LT |
96 | /* PCI ROM control bits (IORESOURCE_BITS) */ |
97 | #define IORESOURCE_ROM_ENABLE (1<<0) /* ROM is enabled, same as PCI_ROM_ADDRESS_ENABLE */ | |
98 | #define IORESOURCE_ROM_SHADOW (1<<1) /* ROM is copy at C000:0 */ | |
99 | #define IORESOURCE_ROM_COPY (1<<2) /* ROM is alloc'd copy, resource field overlaid */ | |
a2302c68 | 100 | #define IORESOURCE_ROM_BIOS_COPY (1<<3) /* ROM is BIOS copy, resource field overlaid */ |
1da177e4 | 101 | |
fb0f2b40 RB |
102 | /* PCI control bits. Shares IORESOURCE_BITS with above PCI ROM. */ |
103 | #define IORESOURCE_PCI_FIXED (1<<4) /* Do not move resource */ | |
104 | ||
1da177e4 LT |
105 | /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ |
106 | extern struct resource ioport_resource; | |
107 | extern struct resource iomem_resource; | |
108 | ||
109 | extern int request_resource(struct resource *root, struct resource *new); | |
1da177e4 | 110 | extern int release_resource(struct resource *new); |
cd6ef2ad | 111 | extern int insert_resource(struct resource *parent, struct resource *new); |
1da177e4 | 112 | extern int allocate_resource(struct resource *root, struct resource *new, |
d75fc8bb GKH |
113 | resource_size_t size, resource_size_t min, |
114 | resource_size_t max, resource_size_t align, | |
1da177e4 | 115 | void (*alignf)(void *, struct resource *, |
d75fc8bb | 116 | resource_size_t, resource_size_t), |
1da177e4 | 117 | void *alignf_data); |
d75fc8bb GKH |
118 | int adjust_resource(struct resource *res, resource_size_t start, |
119 | resource_size_t size); | |
88452565 | 120 | resource_size_t resource_alignment(struct resource *res); |
1a4e564b MD |
121 | static inline resource_size_t resource_size(struct resource *res) |
122 | { | |
123 | return res->end - res->start + 1; | |
124 | } | |
1da177e4 LT |
125 | |
126 | /* Convenience shorthand with allocation */ | |
127 | #define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name)) | |
128 | #define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name)) | |
129 | #define rename_region(region, newname) do { (region)->name = (newname); } while (0) | |
130 | ||
d75fc8bb GKH |
131 | extern struct resource * __request_region(struct resource *, |
132 | resource_size_t start, | |
133 | resource_size_t n, const char *name); | |
1da177e4 LT |
134 | |
135 | /* Compatibility cruft */ | |
136 | #define release_region(start,n) __release_region(&ioport_resource, (start), (n)) | |
137 | #define check_mem_region(start,n) __check_region(&iomem_resource, (start), (n)) | |
138 | #define release_mem_region(start,n) __release_region(&iomem_resource, (start), (n)) | |
139 | ||
d75fc8bb GKH |
140 | extern int __check_region(struct resource *, resource_size_t, resource_size_t); |
141 | extern void __release_region(struct resource *, resource_size_t, | |
142 | resource_size_t); | |
1da177e4 | 143 | |
d75fc8bb GKH |
144 | static inline int __deprecated check_region(resource_size_t s, |
145 | resource_size_t n) | |
1da177e4 LT |
146 | { |
147 | return __check_region(&ioport_resource, s, n); | |
148 | } | |
9ac7849e TH |
149 | |
150 | /* Wrappers for managed devices */ | |
151 | struct device; | |
152 | #define devm_request_region(dev,start,n,name) \ | |
153 | __devm_request_region(dev, &ioport_resource, (start), (n), (name)) | |
154 | #define devm_request_mem_region(dev,start,n,name) \ | |
155 | __devm_request_region(dev, &iomem_resource, (start), (n), (name)) | |
156 | ||
157 | extern struct resource * __devm_request_region(struct device *dev, | |
158 | struct resource *parent, resource_size_t start, | |
159 | resource_size_t n, const char *name); | |
160 | ||
161 | #define devm_release_region(start,n) \ | |
162 | __devm_release_region(dev, &ioport_resource, (start), (n)) | |
163 | #define devm_release_mem_region(start,n) \ | |
164 | __devm_release_region(dev, &iomem_resource, (start), (n)) | |
165 | ||
166 | extern void __devm_release_region(struct device *dev, struct resource *parent, | |
167 | resource_size_t start, resource_size_t n); | |
168 | ||
c9cce83d | 169 | #endif /* __ASSEMBLY__ */ |
1da177e4 | 170 | #endif /* _LINUX_IOPORT_H */ |