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Commit | Line | Data |
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a5117ba7 RH |
1 | /* |
2 | * ISA bus. | |
3 | */ | |
4 | ||
5 | #ifndef __LINUX_ISA_H | |
6 | #define __LINUX_ISA_H | |
7 | ||
8 | #include <linux/device.h> | |
5e25db87 | 9 | #include <linux/errno.h> |
a5117ba7 RH |
10 | #include <linux/kernel.h> |
11 | ||
12 | struct isa_driver { | |
13 | int (*match)(struct device *, unsigned int); | |
14 | int (*probe)(struct device *, unsigned int); | |
15 | int (*remove)(struct device *, unsigned int); | |
16 | void (*shutdown)(struct device *, unsigned int); | |
17 | int (*suspend)(struct device *, unsigned int, pm_message_t); | |
18 | int (*resume)(struct device *, unsigned int); | |
19 | ||
20 | struct device_driver driver; | |
21 | struct device *devices; | |
22 | }; | |
23 | ||
24 | #define to_isa_driver(x) container_of((x), struct isa_driver, driver) | |
25 | ||
3a495511 | 26 | #ifdef CONFIG_ISA_BUS_API |
a5117ba7 RH |
27 | int isa_register_driver(struct isa_driver *, unsigned int); |
28 | void isa_unregister_driver(struct isa_driver *); | |
fa890d58 MW |
29 | #else |
30 | static inline int isa_register_driver(struct isa_driver *d, unsigned int i) | |
31 | { | |
5e25db87 | 32 | return -ENODEV; |
fa890d58 MW |
33 | } |
34 | ||
35 | static inline void isa_unregister_driver(struct isa_driver *d) | |
36 | { | |
37 | } | |
38 | #endif | |
a5117ba7 | 39 | |
339e6e31 WBG |
40 | /** |
41 | * module_isa_driver() - Helper macro for registering a ISA driver | |
42 | * @__isa_driver: isa_driver struct | |
43 | * @__num_isa_dev: number of devices to register | |
44 | * | |
45 | * Helper macro for ISA drivers which do not do anything special in module | |
46 | * init/exit. This eliminates a lot of boilerplate code. Each module may only | |
47 | * use this macro once, and calling it replaces module_init and module_exit. | |
48 | */ | |
49 | #define module_isa_driver(__isa_driver, __num_isa_dev) \ | |
50 | static int __init __isa_driver##_init(void) \ | |
51 | { \ | |
52 | return isa_register_driver(&(__isa_driver), __num_isa_dev); \ | |
53 | } \ | |
54 | module_init(__isa_driver##_init); \ | |
55 | static void __exit __isa_driver##_exit(void) \ | |
56 | { \ | |
57 | isa_unregister_driver(&(__isa_driver)); \ | |
58 | } \ | |
59 | module_exit(__isa_driver##_exit); | |
60 | ||
d9a9c617 WBG |
61 | /** |
62 | * max_num_isa_dev() - Maximum possible number registered of an ISA device | |
63 | * @__ida_dev_ext: ISA device address extent | |
64 | * | |
65 | * The highest base address possible for an ISA device is 0x3FF; this results in | |
66 | * 1024 possible base addresses. Dividing the number of possible base addresses | |
67 | * by the address extent taken by each device results in the maximum number of | |
68 | * devices on a system. | |
69 | */ | |
70 | #define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext) | |
71 | ||
a5117ba7 | 72 | #endif /* __LINUX_ISA_H */ |