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