stinger.c
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上传日期:2013-02-24
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- /*
- * $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%dn", 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");