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/init.h>
  35#include <linux/slab.h>
  36
  37#define DRIVER_DESC     "Gameport data dumper module"
  38
  39MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
  40MODULE_DESCRIPTION(DRIVER_DESC);
  41MODULE_LICENSE("GPL");
  42
  43#define BUF_SIZE 256
  44
  45struct joydump {
  46        unsigned int time;
  47        unsigned char data;
  48};
  49
  50static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
  51{
  52        struct joydump *buf;    /* all entries */
  53        struct joydump *dump, *prev;    /* one entry each */
  54        int axes[4], buttons;
  55        int i, j, t, timeout;
  56        unsigned long flags;
  57        unsigned char u;
  58
  59        printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
  60        printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
  61        printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
  62
  63        if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
  64
  65                printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
  66
  67                if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
  68
  69                        printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
  70                        printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
  71                        return -ENODEV;
  72                }
  73
  74                gameport_cooked_read(gameport, axes, &buttons);
  75
  76                for (i = 0; i < 4; i++)
  77                        printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
  78                printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
  79                printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
  80        }
  81
  82        timeout = gameport_time(gameport, 10000); /* 10 ms */
  83
  84        buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);
  85        if (!buf) {
  86                printk(KERN_INFO "joydump: no memory for testing\n");
  87                goto jd_end;
  88        }
  89        dump = buf;
  90        t = 0;
  91        i = 1;
  92
  93        local_irq_save(flags);
  94
  95        u = gameport_read(gameport);
  96
  97        dump->data = u;
  98        dump->time = t;
  99        dump++;
 100
 101        gameport_trigger(gameport);
 102
 103        while (i < BUF_SIZE && t < timeout) {
 104
 105                dump->data = gameport_read(gameport);
 106
 107                if (dump->data ^ u) {
 108                        u = dump->data;
 109                        dump->time = t;
 110                        i++;
 111                        dump++;
 112                }
 113                t++;
 114        }
 115
 116        local_irq_restore(flags);
 117
 118/*
 119 * Dump data.
 120 */
 121
 122        t = i;
 123        dump = buf;
 124        prev = dump;
 125
 126        printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
 127        printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
 128        for (j = 7; j >= 0; j--)
 129                printk("%d", (dump->data >> j) & 1);
 130        printk(" |\n");
 131        dump++;
 132
 133        for (i = 1; i < t; i++, dump++, prev++) {
 134                printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
 135                        i, dump->time - prev->time);
 136                for (j = 7; j >= 0; j--)
 137                        printk("%d", (dump->data >> j) & 1);
 138                printk(" |\n");
 139        }
 140        kfree(buf);
 141
 142jd_end:
 143        printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
 144
 145        return 0;
 146}
 147
 148static void joydump_disconnect(struct gameport *gameport)
 149{
 150        gameport_close(gameport);
 151}
 152
 153static struct gameport_driver joydump_drv = {
 154        .driver         = {
 155                .name   = "joydump",
 156        },
 157        .description    = DRIVER_DESC,
 158        .connect        = joydump_connect,
 159        .disconnect     = joydump_disconnect,
 160};
 161
 162module_gameport_driver(joydump_drv);
 163