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494 giacomo 1 
/*
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 * $Id: joydump.c,v 1.1 2004-03-08 18:47:38 giacomo Exp $
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 *
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 *  Copyright (c) 1996-2001 Vojtech Pavlik
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 */
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/*
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 * This is just a very simple driver that can dump the data
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 * out of the joystick port into the syslog ...
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 */
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/*
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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 *
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 * Should you need to contact me, the author, you can do so either by
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 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
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 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
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 */
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#include <linuxcomp.h>
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#include <linux/module.h>
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#include <linux/gameport.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Gameport data dumper module");
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MODULE_LICENSE("GPL");
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#define BUF_SIZE 256
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struct joydump {
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        unsigned int time;
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        unsigned char data;
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};
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static void __devinit joydump_connect(struct gameport *gameport, struct gameport_dev *dev)
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{
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        struct joydump buf[BUF_SIZE];
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        int axes[4], buttons;
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        int i, j, t, timeout;
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        unsigned long flags;
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        unsigned char u;
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        printk(KERN_INFO "joydump: ,------------------- START ------------------.\n");
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        printk(KERN_INFO "joydump: | Dumping gameport%s.\n", gameport->phys);
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        printk(KERN_INFO "joydump: | Speed: %4d kHz.                            |\n", gameport->speed);
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        if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW)) {
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                printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
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                if (gameport_open(gameport, dev, GAMEPORT_MODE_COOKED)) {
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                        printk(KERN_INFO "joydump: | Cooked not available either. Failing.      |\n");
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                        printk(KERN_INFO "joydump: `-------------------- END -------------------'\n");
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                        return;
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                }
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                gameport_cooked_read(gameport, axes, &buttons);
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                for (i = 0; i < 4; i++)
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                        printk(KERN_INFO "joydump: | Axis %d: %4d.                              |\n", i, axes[i]);
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                printk(KERN_INFO "joydump: | Buttons %02x.                                |\n", buttons);
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                printk(KERN_INFO "joydump: `-------------------- END -------------------'\n");
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        }
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        timeout = gameport_time(gameport, 10000); /* 10 ms */
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        t = 0;
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        i = 1;
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        local_irq_save(flags);
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        u = gameport_read(gameport);
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        buf[0].data = u;
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        buf[0].time = t;
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        gameport_trigger(gameport);
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        while (i < BUF_SIZE && t < timeout) {
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                buf[i].data = gameport_read(gameport);
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                if (buf[i].data ^ u) {
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                        u = buf[i].data;
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                        buf[i].time = t;
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                        i++;
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                }
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                t++;
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        }
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        local_irq_restore(flags);
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/*
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 * Dump data.
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 */
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        t = i;
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        printk(KERN_INFO "joydump: >------------------- DATA -------------------<\n");
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        printk(KERN_INFO "joydump: | index: %3d delta: %3d.%02d us data: ", 0, 0, 0);
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        for (j = 7; j >= 0; j--)
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                printk("%d",(buf[0].data >> j) & 1);
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        printk(" |\n");
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        for (i = 1; i < t; i++) {
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                printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
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                        i, buf[i].time - buf[i-1].time);
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                for (j = 7; j >= 0; j--)
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                        printk("%d",(buf[i].data >> j) & 1);
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                printk("    |\n");
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        }
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        printk(KERN_INFO "joydump: `-------------------- END -------------------'\n");
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}
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static void __devexit joydump_disconnect(struct gameport *gameport)
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{
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        gameport_close(gameport);
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}
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static struct gameport_dev joydump_dev = {
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        .connect =      joydump_connect,
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        .disconnect =   joydump_disconnect,
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};
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/*static*/ int __init joydump_init(void)
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{
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        gameport_register_device(&joydump_dev);
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        return 0;
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}
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/*static*/ void __exit joydump_exit(void)
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{
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        gameport_unregister_device(&joydump_dev);
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}
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module_init(joydump_init);
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module_exit(joydump_exit);