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/*

 * $Id: joydump.c,v 1.1 2002/01/23 06:56:16 jsimmons Exp $

 *

 *  Copyright (c) 1996-2001 Vojtech Pavlik

 */

/*

 * This is just a very simple driver that can dump the data

 * out of the joystick port into the syslog ...

 */

/*

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

 *

 * Should you need to contact me, the author, you can do so either by

 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:

 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic

 */

#include <linux/module.h>

#include <linux/gameport.h>

#include <linux/kernel.h>

#include <linux/delay.h>

#include <linux/init.h>

#include <linux/slab.h>

#define DRIVER_DESC     "Gameport data dumper module"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE("GPL");

#define BUF_SIZE 256

struct joydump {

        unsigned int time;

        unsigned char data;

};

static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)

{

        struct joydump *buf;    /* all entries */

        struct joydump *dump, *prev;    /* one entry each */

        int axes[4], buttons;

        int i, j, t, timeout;

        unsigned long flags;

        unsigned char u;

        printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");

        printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);

        printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);

        if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {

                printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");

                if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {

                        printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");

                        printk(KERN_INFO "joydump: `------------------- END -----------------'\n");

                        return -ENODEV;

                }

                gameport_cooked_read(gameport, axes, &buttons);

                for (i = 0; i < 4; i++)

                        printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);

                printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);

                printk(KERN_INFO "joydump: `------------------- END -----------------'\n");

        }

        timeout = gameport_time(gameport, 10000); /* 10 ms */

        buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);

        if (!buf) {

                printk(KERN_INFO "joydump: no memory for testing\n");

                goto jd_end;

        }

        dump = buf;

        t = 0;

        i = 1;

        local_irq_save(flags);

        u = gameport_read(gameport);

        dump->data = u;

        dump->time = t;

        dump++;

        gameport_trigger(gameport);

        while (i < BUF_SIZE && t < timeout) {

                dump->data = gameport_read(gameport);

                if (dump->data ^ u) {

                        u = dump->data;

                        dump->time = t;

                        i++;

                        dump++;

                }

                t++;

        }

        local_irq_restore(flags);

/*

 * Dump data.

 */

        t = i;

        dump = buf;

        prev = dump;

        printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");

        printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);

        for (j = 7; j >= 0; j--)

                printk("%d", (dump->data >> j) & 1);

        printk(" |\n");

        dump++;

        for (i = 1; i < t; i++, dump++, prev++) {

                printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",

                        i, dump->time - prev->time);

                for (j = 7; j >= 0; j--)

                        printk("%d", (dump->data >> j) & 1);

                printk(" |\n");

        }

        kfree(buf);

jd_end:

        printk(KERN_INFO "joydump: `------------------- END -----------------'\n");

        return 0;

}

static void joydump_disconnect(struct gameport *gameport)

{

        gameport_close(gameport);

}

static struct gameport_driver joydump_drv = {

        .driver         = {

                .name   = "joydump",

        },

        .description    = DRIVER_DESC,

        .connect        = joydump_connect,

        .disconnect     = joydump_disconnect,

};

static int __init joydump_init(void)

{

        gameport_register_driver(&joydump_drv);

        return 0;

}

static void __exit joydump_exit(void)

{

        gameport_unregister_driver(&joydump_drv);

}

module_init(joydump_init);

module_exit(joydump_exit);