| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * ISA bus. |
| */ |
| |
| #ifndef __LINUX_ISA_H |
| #define __LINUX_ISA_H |
| |
| #include <linux/device.h> |
| #include <linux/errno.h> |
| #include <linux/kernel.h> |
| |
| struct isa_driver { |
| int (*match)(struct device *, unsigned int); |
| int (*probe)(struct device *, unsigned int); |
| void (*remove)(struct device *, unsigned int); |
| void (*shutdown)(struct device *, unsigned int); |
| int (*suspend)(struct device *, unsigned int, pm_message_t); |
| int (*resume)(struct device *, unsigned int); |
| |
| struct device_driver driver; |
| struct device *devices; |
| }; |
| |
| #define to_isa_driver(x) container_of((x), struct isa_driver, driver) |
| |
| #ifdef CONFIG_ISA_BUS_API |
| int isa_register_driver(struct isa_driver *, unsigned int); |
| void isa_unregister_driver(struct isa_driver *); |
| #else |
| static inline int isa_register_driver(struct isa_driver *d, unsigned int i) |
| { |
| return -ENODEV; |
| } |
| |
| static inline void isa_unregister_driver(struct isa_driver *d) |
| { |
| } |
| #endif |
| |
| /** |
| * module_isa_driver() - Helper macro for registering a ISA driver |
| * @__isa_driver: isa_driver struct |
| * @__num_isa_dev: number of devices to register |
| * |
| * Helper macro for ISA drivers which do not do anything special in module |
| * init/exit. This eliminates a lot of boilerplate code. Each module may only |
| * use this macro once, and calling it replaces module_init and module_exit. |
| */ |
| #define module_isa_driver(__isa_driver, __num_isa_dev) \ |
| static int __init __isa_driver##_init(void) \ |
| { \ |
| return isa_register_driver(&(__isa_driver), __num_isa_dev); \ |
| } \ |
| module_init(__isa_driver##_init); \ |
| static void __exit __isa_driver##_exit(void) \ |
| { \ |
| isa_unregister_driver(&(__isa_driver)); \ |
| } \ |
| module_exit(__isa_driver##_exit); |
| |
| /** |
| * max_num_isa_dev() - Maximum possible number registered of an ISA device |
| * @__ida_dev_ext: ISA device address extent |
| * |
| * The highest base address possible for an ISA device is 0x3FF; this results in |
| * 1024 possible base addresses. Dividing the number of possible base addresses |
| * by the address extent taken by each device results in the maximum number of |
| * devices on a system. |
| */ |
| #define max_num_isa_dev(__isa_dev_ext) (1024 / __isa_dev_ext) |
| |
| #endif /* __LINUX_ISA_H */ |