Viewing file:  stinger.c (5.08 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*
* $Id: stinger.c,v 1.4 2001/05/23 09:25:02 vojtech Exp $
*
* Copyright (c) 2000-2001 Vojtech Pavlik
* Copyright (c) 2000 Mark Fletcher
*
* Sponsored by SuSE
*/
/*
* Gravis Stinger gamepad driver for Linux
*/
/*
* This program is free warftware; 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, Ucitelska 1576, Prague 8, 182 00 Czech Republic
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/init.h>
/*
* Constants.
*/
#define STINGER_MAX_LENGTH 8
static char *stinger_name = "Gravis Stinger";
/*
* Per-Stinger data.
*/
struct stinger {
struct input_dev dev;
int idx;
unsigned char data[STINGER_MAX_LENGTH];
};
/*
* stinger_process_packet() decodes packets the driver receives from the
* Stinger. It updates the data accordingly.
*/
static void stinger_process_packet(struct stinger *stinger)
{
struct input_dev *dev = &stinger->dev;
unsigned char *data = stinger->data;
if (!stinger->idx) return;
input_report_key(dev, BTN_A, ((data[0] & 0x20) >> 5));
input_report_key(dev, BTN_B, ((data[0] & 0x10) >> 4));
input_report_key(dev, BTN_C, ((data[0] & 0x08) >> 3));
input_report_key(dev, BTN_X, ((data[0] & 0x04) >> 2));
input_report_key(dev, BTN_Y, ((data[3] & 0x20) >> 5));
input_report_key(dev, BTN_Z, ((data[3] & 0x10) >> 4));
input_report_key(dev, BTN_TL, ((data[3] & 0x08) >> 3));
input_report_key(dev, BTN_TR, ((data[3] & 0x04) >> 2));
input_report_key(dev, BTN_SELECT, ((data[3] & 0x02) >> 1));
input_report_key(dev, BTN_START, (data[3] & 0x01));
input_report_abs(dev, ABS_X, (data[1] & 0x3F) - ((data[0] & 0x01) << 6));
input_report_abs(dev, ABS_Y, ((data[0] & 0x02) << 5) - (data[2] & 0x3F));
return;
}
/*
* stinger_interrupt() is called by the low level driver when characters
* are ready for us. We then buffer them for further processing, or call the
* packet processing routine.
*/
static void stinger_interrupt(struct serio *serio, unsigned char data, unsigned int flags)
{
struct stinger* stinger = serio->private;
/* All Stinger packets are 4 bytes */
if (stinger->idx < STINGER_MAX_LENGTH)
stinger->data[stinger->idx++] = data;
if (stinger->idx == 4) {
stinger_process_packet(stinger);
stinger->idx = 0;
}
return;
}
/*
* stinger_disconnect() is the opposite of stinger_connect()
*/
static void stinger_disconnect(struct serio *serio)
{
struct stinger* stinger = serio->private;
input_unregister_device(&stinger->dev);
serio_close(serio);
kfree(stinger);
}
/*
* stinger_connect() is the routine that is called when someone adds a
* new serio device. It looks for the Stinger, and if found, registers
* it as an input device.
*/
static void stinger_connect(struct serio *serio, struct serio_dev *dev)
{
struct stinger *stinger;
int i;
if (serio->type != (SERIO_RS232 | SERIO_STINGER))
return;
if (!(stinger = kmalloc(sizeof(struct stinger), GFP_KERNEL)))
return;
memset(stinger, 0, sizeof(struct stinger));
stinger->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
stinger->dev.keybit[LONG(BTN_A)] = BIT(BTN_A) | BIT(BTN_B) | BIT(BTN_C) | BIT(BTN_X) | \
BIT(BTN_Y) | BIT(BTN_Z) | BIT(BTN_TL) | BIT(BTN_TR) | \
BIT(BTN_START) | BIT(BTN_SELECT);
stinger->dev.absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
stinger->dev.name = stinger_name;
stinger->dev.idbus = BUS_RS232;
stinger->dev.idvendor = SERIO_STINGER;
stinger->dev.idproduct = 0x0001;
stinger->dev.idversion = 0x0100;
for (i = 0; i < 2; i++) {
stinger->dev.absmax[ABS_X+i] = 64;
stinger->dev.absmin[ABS_X+i] = -64;
stinger->dev.absflat[ABS_X+i] = 4;
}
stinger->dev.private = stinger;
serio->private = stinger;
if (serio_open(serio, dev)) {
kfree(stinger);
return;
}
input_register_device(&stinger->dev);
printk(KERN_INFO "input%d: %s on serio%d\n", stinger->dev.number, stinger_name, serio->number);
}
/*
* The serio device structure.
*/
static struct serio_dev stinger_dev = {
interrupt: stinger_interrupt,
connect: stinger_connect,
disconnect: stinger_disconnect,
};
/*
* The functions for inserting/removing us as a module.
*/
int __init stinger_init(void)
{
serio_register_device(&stinger_dev);
return 0;
}
void __exit stinger_exit(void)
{
serio_unregister_device(&stinger_dev);
}
module_init(stinger_init);
module_exit(stinger_exit);
MODULE_LICENSE("GPL");
|