LXR linux/drivers/input/joystick/joydump.c

   1/*
   2 *  Copyright (c) 1996-2001 Vojtech Pavlik
   3 */
   4
   5/*
   6 * This is just a very simple driver that can dump the data
   7 * out of the joystick port into the syslog ...
   8 */
   9
  10/*
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or
  14 * (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24 *
  25 * Should you need to contact me, the author, you can do so either by
  26 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  27 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  28 */
  29
  30#include <linux/module.h>
  31#include <linux/gameport.h>
  32#include <linux/kernel.h>
  33#include <linux/delay.h>
  34#include <linux/slab.h>
  35
  36#define DRIVER_DESC     "Gameport data dumper module"
  37
  38MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  39MODULE_DESCRIPTION(DRIVER_DESC);
  40MODULE_LICENSE("GPL");
  41
  42#define BUF_SIZE 256
  43
  44struct joydump {
  45        unsigned int time;
  46        unsigned char data;
  47};
  48
  49static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
  50{
  51        struct joydump *buf;    /* all entries */
  52        struct joydump *dump, *prev;    /* one entry each */
  53        int axes[4], buttons;
  54        int i, j, t, timeout;
  55        unsigned long flags;
  56        unsigned char u;
  57
  58        printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
  59        printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
  60        printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
  61
  62        if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
  63
  64                printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
  65
  66                if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
  67
  68                        printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
  69                        printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
  70                        return -ENODEV;
  71                }
  72
  73                gameport_cooked_read(gameport, axes, &buttons);
  74
  75                for (i = 0; i < 4; i++)
  76                        printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
  77                printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
  78                printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
  79        }
  80
  81        timeout = gameport_time(gameport, 10000); /* 10 ms */
  82
  83        buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);
  84        if (!buf) {
  85                printk(KERN_INFO "joydump: no memory for testing\n");
  86                goto jd_end;
  87        }
  88        dump = buf;
  89        t = 0;
  90        i = 1;
  91
  92        local_irq_save(flags);
  93
  94        u = gameport_read(gameport);
  95
  96        dump->data = u;
  97        dump->time = t;
  98        dump++;
  99
 100        gameport_trigger(gameport);
 101
 102        while (i < BUF_SIZE && t < timeout) {
 103
 104                dump->data = gameport_read(gameport);
 105
 106                if (dump->data ^ u) {
 107                        u = dump->data;
 108                        dump->time = t;
 109                        i++;
 110                        dump++;
 111                }
 112                t++;
 113        }
 114
 115        local_irq_restore(flags);
 116
 117/*
 118 * Dump data.
 119 */
 120
 121        t = i;
 122        dump = buf;
 123        prev = dump;
 124
 125        printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
 126        printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
 127        for (j = 7; j >= 0; j--)
 128                printk("%d", (dump->data >> j) & 1);
 129        printk(" |\n");
 130        dump++;
 131
 132        for (i = 1; i < t; i++, dump++, prev++) {
 133                printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
 134                        i, dump->time - prev->time);
 135                for (j = 7; j >= 0; j--)
 136                        printk("%d", (dump->data >> j) & 1);
 137                printk(" |\n");
 138        }
 139        kfree(buf);
 140
 141jd_end:
 142        printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
 143
 144        return 0;
 145}
 146
 147static void joydump_disconnect(struct gameport *gameport)
 148{
 149        gameport_close(gameport);
 150}
 151
 152static struct gameport_driver joydump_drv = {
 153        .driver         = {
 154                .name   = "joydump",
 155        },
 156        .description    = DRIVER_DESC,
 157        .connect        = joydump_connect,
 158        .disconnect     = joydump_disconnect,
 159};
 160
 161module_gameport_driver(joydump_drv);
 162