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1 | /* |
2 | * Copyright (c) 1999-2002 Vojtech Pavlik |
3 | * |
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. |
7 | */ |
8 | #ifndef _GAMEPORT_H |
9 | #define _GAMEPORT_H |
10 | |
11 | #include <asm/io.h> |
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> |
19 | |
20 | struct gameport { |
21 | |
22 | void *port_data; /* Private pointer for gameport drivers */ |
23 | char name[32]; |
24 | char phys[32]; |
25 | |
26 | int io; |
27 | int speed; |
28 | int fuzz; |
29 | |
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 *); |
36 | |
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 *); |
42 | |
43 | struct gameport *parent, *child; |
44 | |
45 | struct gameport_driver *drv; |
46 | struct mutex drv_mutex; /* protects serio->drv so attributes can pin driver */ |
47 | |
48 | struct device dev; |
49 | |
50 | struct list_head node; |
51 | }; |
52 | #define to_gameport_port(d) container_of(d, struct gameport, dev) |
53 | |
54 | struct gameport_driver { |
55 | const char *description; |
56 | |
57 | int (*connect)(struct gameport *, struct gameport_driver *drv); |
58 | int (*reconnect)(struct gameport *); |
59 | void (*disconnect)(struct gameport *); |
60 | |
61 | struct device_driver driver; |
62 | |
63 | bool ignore; |
64 | }; |
65 | #define to_gameport_driver(d) container_of(d, struct gameport_driver, driver) |
66 | |
67 | int gameport_open(struct gameport *gameport, struct gameport_driver *drv, int mode); |
68 | void gameport_close(struct gameport *gameport); |
69 | |
70 | #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE)) |
71 | |
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) |
76 | |
77 | void gameport_unregister_port(struct gameport *gameport); |
78 | |
79 | __printf(2, 3) |
80 | void gameport_set_phys(struct gameport *gameport, const char *fmt, ...); |
81 | |
82 | #else |
83 | |
84 | static inline void gameport_register_port(struct gameport *gameport) |
85 | { |
86 | return; |
87 | } |
88 | |
89 | static inline void gameport_unregister_port(struct gameport *gameport) |
90 | { |
91 | return; |
92 | } |
93 | |
94 | static inline __printf(2, 3) |
95 | void gameport_set_phys(struct gameport *gameport, const char *fmt, ...) |
96 | { |
97 | return; |
98 | } |
99 | |
100 | #endif |
101 | |
102 | static inline struct gameport *gameport_allocate_port(void) |
103 | { |
104 | struct gameport *gameport = kzalloc(sizeof(struct gameport), GFP_KERNEL); |
105 | |
106 | return gameport; |
107 | } |
108 | |
109 | static inline void gameport_free_port(struct gameport *gameport) |
110 | { |
111 | kfree(gameport); |
112 | } |
113 | |
114 | static inline void gameport_set_name(struct gameport *gameport, const char *name) |
115 | { |
116 | strlcpy(gameport->name, name, sizeof(gameport->name)); |
117 | } |
118 | |
119 | /* |
120 | * Use the following functions to manipulate gameport's per-port |
121 | * driver-specific data. |
122 | */ |
123 | static inline void *gameport_get_drvdata(struct gameport *gameport) |
124 | { |
125 | return dev_get_drvdata(&gameport->dev); |
126 | } |
127 | |
128 | static inline void gameport_set_drvdata(struct gameport *gameport, void *data) |
129 | { |
130 | dev_set_drvdata(&gameport->dev, data); |
131 | } |
132 | |
133 | /* |
134 | * Use the following functions to pin gameport's driver in process context |
135 | */ |
136 | static inline int gameport_pin_driver(struct gameport *gameport) |
137 | { |
138 | return mutex_lock_interruptible(&gameport->drv_mutex); |
139 | } |
140 | |
141 | static inline void gameport_unpin_driver(struct gameport *gameport) |
142 | { |
143 | mutex_unlock(&gameport->drv_mutex); |
144 | } |
145 | |
146 | int __must_check __gameport_register_driver(struct gameport_driver *drv, |
147 | struct module *owner, const char *mod_name); |
148 | |
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) |
152 | |
153 | void gameport_unregister_driver(struct gameport_driver *drv); |
154 | |
155 | /** |
156 | * module_gameport_driver() - Helper macro for registering a gameport driver |
157 | * @__gameport_driver: gameport_driver struct |
158 | * |
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 |
162 | * module_exit(). |
163 | */ |
164 | #define module_gameport_driver(__gameport_driver) \ |
165 | module_driver(__gameport_driver, gameport_register_driver, \ |
166 | gameport_unregister_driver) |
167 | |
168 | |
169 | static inline void gameport_trigger(struct gameport *gameport) |
170 | { |
171 | if (gameport->trigger) |
172 | gameport->trigger(gameport); |
173 | else |
174 | outb(0xff, gameport->io); |
175 | } |
176 | |
177 | static inline unsigned char gameport_read(struct gameport *gameport) |
178 | { |
179 | if (gameport->read) |
180 | return gameport->read(gameport); |
181 | else |
182 | return inb(gameport->io); |
183 | } |
184 | |
185 | static inline int gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons) |
186 | { |
187 | if (gameport->cooked_read) |
188 | return gameport->cooked_read(gameport, axes, buttons); |
189 | else |
190 | return -1; |
191 | } |
192 | |
193 | static inline int gameport_calibrate(struct gameport *gameport, int *axes, int *max) |
194 | { |
195 | if (gameport->calibrate) |
196 | return gameport->calibrate(gameport, axes, max); |
197 | else |
198 | return -1; |
199 | } |
200 | |
201 | static inline int gameport_time(struct gameport *gameport, int time) |
202 | { |
203 | return (time * gameport->speed) / 1000; |
204 | } |
205 | |
206 | static inline void gameport_set_poll_handler(struct gameport *gameport, void (*handler)(struct gameport *)) |
207 | { |
208 | gameport->poll_handler = handler; |
209 | } |
210 | |
211 | static inline void gameport_set_poll_interval(struct gameport *gameport, unsigned int msecs) |
212 | { |
213 | gameport->poll_interval = msecs; |
214 | } |
215 | |
216 | void gameport_start_polling(struct gameport *gameport); |
217 | void gameport_stop_polling(struct gameport *gameport); |
218 | |
219 | #endif |
220 |
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