Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
a5117ba7 RH |
2 | /* |
3 | * ISA bus. | |
4 | */ | |
5 | ||
6 | #ifndef __LINUX_ISA_H | |
7 | #define __LINUX_ISA_H | |
8 | ||
9 | #include <linux/device.h> | |
5e25db87 | 10 | #include <linux/errno.h> |
a5117ba7 RH |
11 | #include <linux/kernel.h> |
12 | ||
13 | struct isa_driver { | |
14 | int (*match)(struct device *, unsigned int); | |
15 | int (*probe)(struct device *, unsigned int); | |
30e88d01 | 16 | void (*remove)(struct device *, unsigned int); |
a5117ba7 RH |
17 | void (*shutdown)(struct device *, unsigned int); |
18 | int (*suspend)(struct device *, unsigned int, pm_message_t); | |
19 | int (*resume)(struct device *, unsigned int); | |
20 | ||
21 | struct device_driver driver; | |
22 | struct device *devices; | |
23 | }; | |
24 | ||
25 | #define to_isa_driver(x) container_of((x), struct isa_driver, driver) | |
26 | ||
3a495511 | 27 | #ifdef CONFIG_ISA_BUS_API |
a5117ba7 RH |
28 | int isa_register_driver(struct isa_driver *, unsigned int); |
29 | void isa_unregister_driver(struct isa_driver *); | |
fa890d58 MW |
30 | #else |
31 | static inline int isa_register_driver(struct isa_driver *d, unsigned int i) | |
32 | { | |
5e25db87 | 33 | return -ENODEV; |
fa890d58 MW |
34 | } |
35 | ||
36 | static inline void isa_unregister_driver(struct isa_driver *d) | |
37 | { | |
38 | } | |
39 | #endif | |
a5117ba7 | 40 | |
85ebe0af WBG |
41 | #define module_isa_driver_init(__isa_driver, __num_isa_dev) \ |
42 | static int __init __isa_driver##_init(void) \ | |
43 | { \ | |
44 | return isa_register_driver(&(__isa_driver), __num_isa_dev); \ | |
45 | } \ | |
46 | module_init(__isa_driver##_init) | |
47 | ||
48 | #define module_isa_driver_with_irq_init(__isa_driver, __num_isa_dev, __num_irq) \ | |
49 | static int __init __isa_driver##_init(void) \ | |
50 | { \ | |
51 | if (__num_irq != __num_isa_dev) { \ | |
52 | pr_err("%s: Number of irq (%u) does not match number of base (%u)\n", \ | |
53 | __isa_driver.driver.name, __num_irq, __num_isa_dev); \ | |
54 | return -EINVAL; \ | |
55 | } \ | |
56 | return isa_register_driver(&(__isa_driver), __num_isa_dev); \ | |
57 | } \ | |
58 | module_init(__isa_driver##_init) | |
59 | ||
60 | #define module_isa_driver_exit(__isa_driver) \ | |
61 | static void __exit __isa_driver##_exit(void) \ | |
62 | { \ | |
63 | isa_unregister_driver(&(__isa_driver)); \ | |
64 | } \ | |
65 | module_exit(__isa_driver##_exit) | |
66 | ||
339e6e31 WBG |
67 | /** |
68 | * module_isa_driver() - Helper macro for registering a ISA driver | |
69 | * @__isa_driver: isa_driver struct | |
70 | * @__num_isa_dev: number of devices to register | |
71 | * | |
72 | * Helper macro for ISA drivers which do not do anything special in module | |
73 | * init/exit. This eliminates a lot of boilerplate code. Each module may only | |
74 | * use this macro once, and calling it replaces module_init and module_exit. | |
75 | */ | |
76 | #define module_isa_driver(__isa_driver, __num_isa_dev) \ | |
85ebe0af WBG |
77 | module_isa_driver_init(__isa_driver, __num_isa_dev); \ |
78 | module_isa_driver_exit(__isa_driver) | |
79 | ||
80 | /** | |
81 | * module_isa_driver_with_irq() - Helper macro for registering an ISA driver with irq | |
82 | * @__isa_driver: isa_driver struct | |
83 | * @__num_isa_dev: number of devices to register | |
84 | * @__num_irq: number of IRQ to register | |
85 | * | |
86 | * Helper macro for ISA drivers with irq that do not do anything special in | |
87 | * module init/exit. Each module may only use this macro once, and calling it | |
88 | * replaces module_init and module_exit. | |
89 | */ | |
90 | #define module_isa_driver_with_irq(__isa_driver, __num_isa_dev, __num_irq) \ | |
91 | module_isa_driver_with_irq_init(__isa_driver, __num_isa_dev, __num_irq); \ | |
92 | module_isa_driver_exit(__isa_driver) | |
339e6e31 | 93 | |
d9a9c617 WBG |
94 | /** |
95 | * max_num_isa_dev() - Maximum possible number registered of an ISA device | |
96 | * @__ida_dev_ext: ISA device address extent | |
97 | * | |
98 | * The highest base address possible for an ISA device is 0x3FF; this results in | |
99 | * 1024 possible base addresses. Dividing the number of possible base addresses | |
100 | * by the address extent taken by each device results in the maximum number of | |
101 | * devices on a system. | |
102 | */ | |
103 | #define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext) | |
104 | ||
a5117ba7 | 105 | #endif /* __LINUX_ISA_H */ |