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