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 11 struct 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 26 int isa_register_driver(struct isa_driver *, unsigned int); 27 void isa_unregister_driver(struct isa_driver *); 28 #else 29 static inline int isa_register_driver(struct isa_driver *d, unsigned int i) 30 { 31 return 0; 32 } 33 34 static 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) \ 49 static int __init __isa_driver##_init(void) \ 50 { \ 51 return isa_register_driver(&(__isa_driver), __num_isa_dev); \ 52 } \ 53 module_init(__isa_driver##_init); \ 54 static void __exit __isa_driver##_exit(void) \ 55 { \ 56 isa_unregister_driver(&(__isa_driver)); \ 57 } \ 58 module_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 */ 72