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