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72 lines
2.1 KiB
72 lines
2.1 KiB
/* |
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* ISA bus. |
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*/ |
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#ifndef __LINUX_ISA_H |
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#define __LINUX_ISA_H |
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#include <linux/device.h> |
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#include <linux/errno.h> |
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#include <linux/kernel.h> |
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struct isa_driver { |
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int (*match)(struct device *, unsigned int); |
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int (*probe)(struct device *, unsigned int); |
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int (*remove)(struct device *, unsigned int); |
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void (*shutdown)(struct device *, unsigned int); |
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int (*suspend)(struct device *, unsigned int, pm_message_t); |
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int (*resume)(struct device *, unsigned int); |
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struct device_driver driver; |
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struct device *devices; |
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}; |
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#define to_isa_driver(x) container_of((x), struct isa_driver, driver) |
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#ifdef CONFIG_ISA_BUS_API |
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int isa_register_driver(struct isa_driver *, unsigned int); |
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void isa_unregister_driver(struct isa_driver *); |
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#else |
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static inline int isa_register_driver(struct isa_driver *d, unsigned int i) |
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{ |
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return -ENODEV; |
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} |
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static inline void isa_unregister_driver(struct isa_driver *d) |
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{ |
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} |
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#endif |
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/** |
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* module_isa_driver() - Helper macro for registering a ISA driver |
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* @__isa_driver: isa_driver struct |
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* @__num_isa_dev: number of devices to register |
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* |
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* Helper macro for ISA drivers which do not do anything special in module |
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* init/exit. This eliminates a lot of boilerplate code. Each module may only |
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* use this macro once, and calling it replaces module_init and module_exit. |
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*/ |
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#define module_isa_driver(__isa_driver, __num_isa_dev) \ |
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static int __init __isa_driver##_init(void) \ |
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{ \ |
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return isa_register_driver(&(__isa_driver), __num_isa_dev); \ |
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} \ |
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module_init(__isa_driver##_init); \ |
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static void __exit __isa_driver##_exit(void) \ |
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{ \ |
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isa_unregister_driver(&(__isa_driver)); \ |
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} \ |
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module_exit(__isa_driver##_exit); |
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/** |
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* max_num_isa_dev() - Maximum possible number registered of an ISA device |
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* @__ida_dev_ext: ISA device address extent |
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* |
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* The highest base address possible for an ISA device is 0x3FF; this results in |
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* 1024 possible base addresses. Dividing the number of possible base addresses |
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* by the address extent taken by each device results in the maximum number of |
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* devices on a system. |
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*/ |
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#define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext) |
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#endif /* __LINUX_ISA_H */
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