LXR linux/include/linux/isa.h

   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
  12struct 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
  27int isa_register_driver(struct isa_driver *, unsigned int);
  28void isa_unregister_driver(struct isa_driver *);
  29#else
  30static inline int isa_register_driver(struct isa_driver *d, unsigned int i)
  31{
  32        return -ENODEV;
  33}
  34
  35static 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) \
  50static int __init __isa_driver##_init(void) \
  51{ \
  52        return isa_register_driver(&(__isa_driver), __num_isa_dev); \
  53} \
  54module_init(__isa_driver##_init); \
  55static void __exit __isa_driver##_exit(void) \
  56{ \
  57        isa_unregister_driver(&(__isa_driver)); \
  58} \
  59module_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