patch-2.4.4 linux/drivers/char/joystick/stinger.c

• Lines: 201
• Date: Wed Apr 11 19:02:30 2001
• Orig file: v2.4.3/linux/drivers/char/joystick/stinger.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/drivers/char/joystick/stinger.c linux/drivers/char/joystick/stinger.c
@@ -0,0 +1,200 @@
+/*
+ * $Id: stinger.c,v 1.1 2000/07/17 10:42:14 vojtech Exp $
+ *
+ *  Copyright (c) 2000 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[2] & 0x3F) - ((data[0] & 0x02) << 5)));
+
+	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);