drivers/input/joystick/joydump.c

   1 /*
   2  * $Id: joydump.c,v 1.1 2002/01/23 06:56:16 jsimmons Exp $
   3  *
   4  *  Copyright (c) 1996-2001 Vojtech Pavlik
   5  */
   6
   7 /*
   8  * This is just a very simple driver that can dump the data
   9  * out of the joystick port into the syslog ...
  10  */
  11
  12 /*
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  26  *
  27  * Should you need to contact me, the author, you can do so either by
  28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/gameport.h>
  34 #include <linux/kernel.h>
  35 #include <linux/delay.h>
  36 #include <linux/init.h>
  37
  38 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  39 MODULE_DESCRIPTION("Gameport data dumper module");
  40 MODULE_LICENSE("GPL");
  41
  42 #define BUF_SIZE 256
  43
  44 struct joydump {
  45         unsigned int time;
  46         unsigned char data;
  47 };
  48
  49 static void __devinit joydump_connect(struct gameport *gameport, struct gameport_dev *dev)
  50 {
  51         struct joydump buf[BUF_SIZE];
  52         int axes[4], buttons;
  53         int i, j, t, timeout;
  54         unsigned long flags;
  55         unsigned char u;
  56
  57         printk(KERN_INFO "joydump: ,------------------- START ------------------.\n");
  58         printk(KERN_INFO "joydump: | Dumping gameport%s.\n", gameport->phys);
  59         printk(KERN_INFO "joydump: | Speed: %4d kHz.                            |\n", gameport->speed);
  60
  61         if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW)) {
  62
  63                 printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
  64
  65                 if (gameport_open(gameport, dev, GAMEPORT_MODE_COOKED)) {
  66
  67                         printk(KERN_INFO "joydump: | Cooked not available either. Failing.      |\n");
  68                         printk(KERN_INFO "joydump: `-------------------- END -------------------'\n");
  69                         return;
  70                 }
  71
  72                 gameport_cooked_read(gameport, axes, &buttons);
  73
  74                 for (i = 0; i < 4; i++)
  75                         printk(KERN_INFO "joydump: | Axis %d: %4d.                              |\n", i, axes[i]);
  76                 printk(KERN_INFO "joydump: | Buttons %02x.                                |\n", buttons);
  77                 printk(KERN_INFO "joydump: `-------------------- END -------------------'\n");
  78         }
  79
  80         timeout = gameport_time(gameport, 10000); /* 10 ms */
  81         t = 0;
  82         i = 1;
  83
  84         local_irq_save(flags);
  85
  86         u = gameport_read(gameport);
  87
  88         buf[0].data = u;
  89         buf[0].time = t;
  90
  91         gameport_trigger(gameport);
  92
  93         while (i < BUF_SIZE && t < timeout) {
  94
  95                 buf[i].data = gameport_read(gameport);
  96
  97                 if (buf[i].data ^ u) {
  98                         u = buf[i].data;
  99                         buf[i].time = t;
 100                         i++;
 101                 }
 102                 t++;
 103         }
 104
 105         local_irq_restore(flags);
 106
 107 /*
 108  * Dump data.
 109  */
 110
 111         t = i;
 112
 113         printk(KERN_INFO "joydump: >------------------- DATA -------------------<\n");
 114         printk(KERN_INFO "joydump: | index: %3d delta: %3d.%02d us data: ", 0, 0, 0);
 115         for (j = 7; j >= 0; j--)
 116                 printk("%d",(buf[0].data >> j) & 1);
 117         printk(" |\n");
 118         for (i = 1; i < t; i++) {
 119                 printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
 120                         i, buf[i].time - buf[i-1].time);
 121                 for (j = 7; j >= 0; j--)
 122                         printk("%d",(buf[i].data >> j) & 1);
 123                 printk("    |\n");
 124         }
 125
 126         printk(KERN_INFO "joydump: `-------------------- END -------------------'\n");
 127 }
 128
 129 static void __devexit joydump_disconnect(struct gameport *gameport)
 130 {
 131         gameport_close(gameport);
 132 }
 133
 134 static struct gameport_dev joydump_dev = {
 135         .connect =      joydump_connect,
 136         .disconnect =   joydump_disconnect,
 137 };
 138
 139 static int __init joydump_init(void)
 140 {
 141         gameport_register_device(&joydump_dev);
 142         return 0;
 143 }
 144
 145 static void __exit joydump_exit(void)
 146 {
 147         gameport_unregister_device(&joydump_dev);
 148 }
 149
 150 module_init(joydump_init);
 151 module_exit(joydump_exit);