include/linux/gameport.h

   1 #ifndef _GAMEPORT_H
   2 #define _GAMEPORT_H
   3
   4 /*
   5  *  Copyright (c) 1999-2002 Vojtech Pavlik
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11
  12 #ifdef __KERNEL__
  13 #include <asm/io.h>
  14 #include <linux/types.h>
  15 #include <linux/list.h>
  16 #include <linux/mutex.h>
  17 #include <linux/device.h>
  18 #include <linux/timer.h>
  19 #include <linux/slab.h>
  20
  21 struct gameport {
  22
  23         void *port_data;        /* Private pointer for gameport drivers */
  24         char name[32];
  25         char phys[32];
  26
  27         int io;
  28         int speed;
  29         int fuzz;
  30
  31         void (*trigger)(struct gameport *);
  32         unsigned char (*read)(struct gameport *);
  33         int (*cooked_read)(struct gameport *, int *, int *);
  34         int (*calibrate)(struct gameport *, int *, int *);
  35         int (*open)(struct gameport *, int);
  36         void (*close)(struct gameport *);
  37
  38         struct timer_list poll_timer;
  39         unsigned int poll_interval;     /* in msecs */
  40         spinlock_t timer_lock;
  41         unsigned int poll_cnt;
  42         void (*poll_handler)(struct gameport *);
  43
  44         struct gameport *parent, *child;
  45
  46         struct gameport_driver *drv;
  47         struct mutex drv_mutex;         /* protects serio->drv so attributes can pin driver */
  48
  49         struct device dev;
  50
  51         struct list_head node;
  52 };
  53 #define to_gameport_port(d)     container_of(d, struct gameport, dev)
  54
  55 struct gameport_driver {
  56         const char *description;
  57
  58         int (*connect)(struct gameport *, struct gameport_driver *drv);
  59         int (*reconnect)(struct gameport *);
  60         void (*disconnect)(struct gameport *);
  61
  62         struct device_driver driver;
  63
  64         bool ignore;
  65 };
  66 #define to_gameport_driver(d)   container_of(d, struct gameport_driver, driver)
  67
  68 int gameport_open(struct gameport *gameport, struct gameport_driver *drv, int mode);
  69 void gameport_close(struct gameport *gameport);
  70
  71 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
  72
  73 void __gameport_register_port(struct gameport *gameport, struct module *owner);
  74 /* use a define to avoid include chaining to get THIS_MODULE */
  75 #define gameport_register_port(gameport) \
  76         __gameport_register_port(gameport, THIS_MODULE)
  77
  78 void gameport_unregister_port(struct gameport *gameport);
  79
  80 __printf(2, 3)
  81 void gameport_set_phys(struct gameport *gameport, const char *fmt, ...);
  82
  83 #else
  84
  85 static inline void gameport_register_port(struct gameport *gameport)
  86 {
  87         return;
  88 }
  89
  90 static inline void gameport_unregister_port(struct gameport *gameport)
  91 {
  92         return;
  93 }
  94
  95 static inline __printf(2, 3)
  96 void gameport_set_phys(struct gameport *gameport, const char *fmt, ...)
  97 {
  98         return;
  99 }
 100
 101 #endif
 102
 103 static inline struct gameport *gameport_allocate_port(void)
 104 {
 105         struct gameport *gameport = kzalloc(sizeof(struct gameport), GFP_KERNEL);
 106
 107         return gameport;
 108 }
 109
 110 static inline void gameport_free_port(struct gameport *gameport)
 111 {
 112         kfree(gameport);
 113 }
 114
 115 static inline void gameport_set_name(struct gameport *gameport, const char *name)
 116 {
 117         strlcpy(gameport->name, name, sizeof(gameport->name));
 118 }
 119
 120 /*
 121  * Use the following functions to manipulate gameport's per-port
 122  * driver-specific data.
 123  */
 124 static inline void *gameport_get_drvdata(struct gameport *gameport)
 125 {
 126         return dev_get_drvdata(&gameport->dev);
 127 }
 128
 129 static inline void gameport_set_drvdata(struct gameport *gameport, void *data)
 130 {
 131         dev_set_drvdata(&gameport->dev, data);
 132 }
 133
 134 /*
 135  * Use the following functions to pin gameport's driver in process context
 136  */
 137 static inline int gameport_pin_driver(struct gameport *gameport)
 138 {
 139         return mutex_lock_interruptible(&gameport->drv_mutex);
 140 }
 141
 142 static inline void gameport_unpin_driver(struct gameport *gameport)
 143 {
 144         mutex_unlock(&gameport->drv_mutex);
 145 }
 146
 147 int __must_check __gameport_register_driver(struct gameport_driver *drv,
 148                                 struct module *owner, const char *mod_name);
 149
 150 /* use a define to avoid include chaining to get THIS_MODULE & friends */
 151 #define gameport_register_driver(drv) \
 152         __gameport_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)
 153
 154 void gameport_unregister_driver(struct gameport_driver *drv);
 155
 156 /**
 157  * module_gameport_driver() - Helper macro for registering a gameport driver
 158  * @__gameport_driver: gameport_driver struct
 159  *
 160  * Helper macro for gameport drivers which do not do anything special in
 161  * module init/exit. This eliminates a lot of boilerplate. Each module may
 162  * only use this macro once, and calling it replaces module_init() and
 163  * module_exit().
 164  */
 165 #define module_gameport_driver(__gameport_driver) \
 166         module_driver(__gameport_driver, gameport_register_driver, \
 167                        gameport_unregister_driver)
 168
 169 #endif /* __KERNEL__ */
 170
 171 #define GAMEPORT_MODE_DISABLED          0
 172 #define GAMEPORT_MODE_RAW               1
 173 #define GAMEPORT_MODE_COOKED            2
 174
 175 #define GAMEPORT_ID_VENDOR_ANALOG       0x0001
 176 #define GAMEPORT_ID_VENDOR_MADCATZ      0x0002
 177 #define GAMEPORT_ID_VENDOR_LOGITECH     0x0003
 178 #define GAMEPORT_ID_VENDOR_CREATIVE     0x0004
 179 #define GAMEPORT_ID_VENDOR_GENIUS       0x0005
 180 #define GAMEPORT_ID_VENDOR_INTERACT     0x0006
 181 #define GAMEPORT_ID_VENDOR_MICROSOFT    0x0007
 182 #define GAMEPORT_ID_VENDOR_THRUSTMASTER 0x0008
 183 #define GAMEPORT_ID_VENDOR_GRAVIS       0x0009
 184 #define GAMEPORT_ID_VENDOR_GUILLEMOT    0x000a
 185
 186 #ifdef __KERNEL__
 187
 188 static inline void gameport_trigger(struct gameport *gameport)
 189 {
 190         if (gameport->trigger)
 191                 gameport->trigger(gameport);
 192         else
 193                 outb(0xff, gameport->io);
 194 }
 195
 196 static inline unsigned char gameport_read(struct gameport *gameport)
 197 {
 198         if (gameport->read)
 199                 return gameport->read(gameport);
 200         else
 201                 return inb(gameport->io);
 202 }
 203
 204 static inline int gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)
 205 {
 206         if (gameport->cooked_read)
 207                 return gameport->cooked_read(gameport, axes, buttons);
 208         else
 209                 return -1;
 210 }
 211
 212 static inline int gameport_calibrate(struct gameport *gameport, int *axes, int *max)
 213 {
 214         if (gameport->calibrate)
 215                 return gameport->calibrate(gameport, axes, max);
 216         else
 217                 return -1;
 218 }
 219
 220 static inline int gameport_time(struct gameport *gameport, int time)
 221 {
 222         return (time * gameport->speed) / 1000;
 223 }
 224
 225 static inline void gameport_set_poll_handler(struct gameport *gameport, void (*handler)(struct gameport *))
 226 {
 227         gameport->poll_handler = handler;
 228 }
 229
 230 static inline void gameport_set_poll_interval(struct gameport *gameport, unsigned int msecs)
 231 {
 232         gameport->poll_interval = msecs;
 233 }
 234
 235 void gameport_start_polling(struct gameport *gameport);
 236 void gameport_stop_polling(struct gameport *gameport);
 237
 238 #endif /* __KERNEL__ */
 239 #endif