2 * Copyright (c) 1999-2002 Vojtech Pavlik
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
12 #include <linux/types.h>
13 #include <linux/list.h>
14 #include <linux/mutex.h>
15 #include <linux/device.h>
16 #include <linux/timer.h>
17 #include <linux/slab.h>
18 #include <uapi/linux/gameport.h>
22 void *port_data; /* Private pointer for gameport drivers */
30 void (*trigger)(struct gameport *);
31 unsigned char (*read)(struct gameport *);
32 int (*cooked_read)(struct gameport *, int *, int *);
33 int (*calibrate)(struct gameport *, int *, int *);
34 int (*open)(struct gameport *, int);
35 void (*close)(struct gameport *);
37 struct timer_list poll_timer;
38 unsigned int poll_interval; /* in msecs */
39 spinlock_t timer_lock;
40 unsigned int poll_cnt;
41 void (*poll_handler)(struct gameport *);
43 struct gameport *parent, *child;
45 struct gameport_driver *drv;
46 struct mutex drv_mutex; /* protects serio->drv so attributes can pin driver */
50 struct list_head node;
52 #define to_gameport_port(d) container_of(d, struct gameport, dev)
54 struct gameport_driver {
55 const char *description;
57 int (*connect)(struct gameport *, struct gameport_driver *drv);
58 int (*reconnect)(struct gameport *);
59 void (*disconnect)(struct gameport *);
61 struct device_driver driver;
65 #define to_gameport_driver(d) container_of(d, struct gameport_driver, driver)
67 int gameport_open(struct gameport *gameport, struct gameport_driver *drv, int mode);
68 void gameport_close(struct gameport *gameport);
70 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
72 void __gameport_register_port(struct gameport *gameport, struct module *owner);
73 /* use a define to avoid include chaining to get THIS_MODULE */
74 #define gameport_register_port(gameport) \
75 __gameport_register_port(gameport, THIS_MODULE)
77 void gameport_unregister_port(struct gameport *gameport);
80 void gameport_set_phys(struct gameport *gameport, const char *fmt, ...);
84 static inline void gameport_register_port(struct gameport *gameport)
89 static inline void gameport_unregister_port(struct gameport *gameport)
94 static inline __printf(2, 3)
95 void gameport_set_phys(struct gameport *gameport, const char *fmt, ...)
102 static inline struct gameport *gameport_allocate_port(void)
104 struct gameport *gameport = kzalloc(sizeof(struct gameport), GFP_KERNEL);
109 static inline void gameport_free_port(struct gameport *gameport)
114 static inline void gameport_set_name(struct gameport *gameport, const char *name)
116 strlcpy(gameport->name, name, sizeof(gameport->name));
120 * Use the following functions to manipulate gameport's per-port
121 * driver-specific data.
123 static inline void *gameport_get_drvdata(struct gameport *gameport)
125 return dev_get_drvdata(&gameport->dev);
128 static inline void gameport_set_drvdata(struct gameport *gameport, void *data)
130 dev_set_drvdata(&gameport->dev, data);
134 * Use the following functions to pin gameport's driver in process context
136 static inline int gameport_pin_driver(struct gameport *gameport)
138 return mutex_lock_interruptible(&gameport->drv_mutex);
141 static inline void gameport_unpin_driver(struct gameport *gameport)
143 mutex_unlock(&gameport->drv_mutex);
146 int __must_check __gameport_register_driver(struct gameport_driver *drv,
147 struct module *owner, const char *mod_name);
149 /* use a define to avoid include chaining to get THIS_MODULE & friends */
150 #define gameport_register_driver(drv) \
151 __gameport_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)
153 void gameport_unregister_driver(struct gameport_driver *drv);
156 * module_gameport_driver() - Helper macro for registering a gameport driver
157 * @__gameport_driver: gameport_driver struct
159 * Helper macro for gameport drivers which do not do anything special in
160 * module init/exit. This eliminates a lot of boilerplate. Each module may
161 * only use this macro once, and calling it replaces module_init() and
164 #define module_gameport_driver(__gameport_driver) \
165 module_driver(__gameport_driver, gameport_register_driver, \
166 gameport_unregister_driver)
169 static inline void gameport_trigger(struct gameport *gameport)
171 if (gameport->trigger)
172 gameport->trigger(gameport);
174 outb(0xff, gameport->io);
177 static inline unsigned char gameport_read(struct gameport *gameport)
180 return gameport->read(gameport);
182 return inb(gameport->io);
185 static inline int gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
187 if (gameport->cooked_read)
188 return gameport->cooked_read(gameport, axes, buttons);
193 static inline int gameport_calibrate(struct gameport *gameport, int *axes, int *max)
195 if (gameport->calibrate)
196 return gameport->calibrate(gameport, axes, max);
201 static inline int gameport_time(struct gameport *gameport, int time)
203 return (time * gameport->speed) / 1000;
206 static inline void gameport_set_poll_handler(struct gameport *gameport, void (*handler)(struct gameport *))
208 gameport->poll_handler = handler;
211 static inline void gameport_set_poll_interval(struct gameport *gameport, unsigned int msecs)
213 gameport->poll_interval = msecs;
216 void gameport_start_polling(struct gameport *gameport);
217 void gameport_stop_polling(struct gameport *gameport);