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 #include <linux/slab.h>
  38
  39 #define DRIVER_DESC     "Gameport data dumper module"
  40
  41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  42 MODULE_DESCRIPTION(DRIVER_DESC);
  43 MODULE_LICENSE("GPL");
  44
  45 #define BUF_SIZE 256
  46
  47 struct joydump {
  48         unsigned int time;
  49         unsigned char data;
  50 };
  51
  52 static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
  53 {
  54         struct joydump *buf;    /* all entries */
  55         struct joydump *dump, *prev;    /* one entry each */
  56         int axes[4], buttons;
  57         int i, j, t, timeout;
  58         unsigned long flags;
  59         unsigned char u;
  60
  61         printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
  62         printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
  63         printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
  64
  65         if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
  66
  67                 printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
  68
  69                 if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
  70
  71                         printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
  72                         printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
  73                         return -ENODEV;
  74                 }
  75
  76                 gameport_cooked_read(gameport, axes, &buttons);
  77
  78                 for (i = 0; i < 4; i++)
  79                         printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
  80                 printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
  81                 printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
  82         }
  83
  84         timeout = gameport_time(gameport, 10000); /* 10 ms */
  85
  86         buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);
  87         if (!buf) {
  88                 printk(KERN_INFO "joydump: no memory for testing\n");
  89                 goto jd_end;
  90         }
  91         dump = buf;
  92         t = 0;
  93         i = 1;
  94
  95         local_irq_save(flags);
  96
  97         u = gameport_read(gameport);
  98
  99         dump->data = u;
 100         dump->time = t;
 101         dump++;
 102
 103         gameport_trigger(gameport);
 104
 105         while (i < BUF_SIZE && t < timeout) {
 106
 107                 dump->data = gameport_read(gameport);
 108
 109                 if (dump->data ^ u) {
 110                         u = dump->data;
 111                         dump->time = t;
 112                         i++;
 113                         dump++;
 114                 }
 115                 t++;
 116         }
 117
 118         local_irq_restore(flags);
 119
 120 /*
 121  * Dump data.
 122  */
 123
 124         t = i;
 125         dump = buf;
 126         prev = dump;
 127
 128         printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
 129         printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
 130         for (j = 7; j >= 0; j--)
 131                 printk("%d", (dump->data >> j) & 1);
 132         printk(" |\n");
 133         dump++;
 134
 135         for (i = 1; i < t; i++, dump++, prev++) {
 136                 printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
 137                         i, dump->time - prev->time);
 138                 for (j = 7; j >= 0; j--)
 139                         printk("%d", (dump->data >> j) & 1);
 140                 printk(" |\n");
 141         }
 142         kfree(buf);
 143
 144 jd_end:
 145         printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
 146
 147         return 0;
 148 }
 149
 150 static void joydump_disconnect(struct gameport *gameport)
 151 {
 152         gameport_close(gameport);
 153 }
 154
 155 static struct gameport_driver joydump_drv = {
 156         .driver         = {
 157                 .name   = "joydump",
 158         },
 159         .description    = DRIVER_DESC,
 160         .connect        = joydump_connect,
 161         .disconnect     = joydump_disconnect,
 162 };
 163
 164 static int __init joydump_init(void)
 165 {
 166         gameport_register_driver(&joydump_drv);
 167         return 0;
 168 }
 169
 170 static void __exit joydump_exit(void)
 171 {
 172         gameport_unregister_driver(&joydump_drv);
 173 }
 174
 175 module_init(joydump_init);
 176 module_exit(joydump_exit);