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/errno.h> 10 #include <linux/kernel.h> 11 12 struct isa_driver { 13 int (*match)(struct device *, unsigned int); 14 int (*probe)(struct device *, unsigned int); 15 int (*remove)(struct device *, unsigned int); 16 void (*shutdown)(struct device *, unsigned int); 17 int (*suspend)(struct device *, unsigned int, pm_message_t); 18 int (*resume)(struct device *, unsigned int); 19 20 struct device_driver driver; 21 struct device *devices; 22 }; 23 24 #define to_isa_driver(x) container_of((x), struct isa_driver, driver) 25 26 #ifdef CONFIG_ISA_BUS_API 27 int isa_register_driver(struct isa_driver *, unsigned int); 28 void isa_unregister_driver(struct isa_driver *); 29 #else 30 static inline int isa_register_driver(struct isa_driver *d, unsigned int i) 31 { 32 return -ENODEV; 33 } 34 35 static inline void isa_unregister_driver(struct isa_driver *d) 36 { 37 } 38 #endif 39 40 /** 41 * module_isa_driver() - Helper macro for registering a ISA driver 42 * @__isa_driver: isa_driver struct 43 * @__num_isa_dev: number of devices to register 44 * 45 * Helper macro for ISA drivers which do not do anything special in module 46 * init/exit. This eliminates a lot of boilerplate code. Each module may only 47 * use this macro once, and calling it replaces module_init and module_exit. 48 */ 49 #define module_isa_driver(__isa_driver, __num_isa_dev) \ 50 static int __init __isa_driver##_init(void) \ 51 { \ 52 return isa_register_driver(&(__isa_driver), __num_isa_dev); \ 53 } \ 54 module_init(__isa_driver##_init); \ 55 static void __exit __isa_driver##_exit(void) \ 56 { \ 57 isa_unregister_driver(&(__isa_driver)); \ 58 } \ 59 module_exit(__isa_driver##_exit); 60 61 /** 62 * max_num_isa_dev() - Maximum possible number registered of an ISA device 63 * @__ida_dev_ext: ISA device address extent 64 * 65 * The highest base address possible for an ISA device is 0x3FF; this results in 66 * 1024 possible base addresses. Dividing the number of possible base addresses 67 * by the address extent taken by each device results in the maximum number of 68 * devices on a system. 69 */ 70 #define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext) 71 72 #endif /* __LINUX_ISA_H */ 73