patch-2.4.0-test2 linux/drivers/char/joystick/magellan.c

• Lines: 211
• Date: Wed Jun 21 08:22:21 2000
• Orig file: v2.4.0-test1/linux/drivers/char/joystick/magellan.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/magellan.c linux/drivers/char/joystick/magellan.c
@@ -0,0 +1,210 @@
+/*
+ * $Id: magellan.c,v 1.8 2000/05/31 13:17:12 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2000 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * Magellan and Space Mouse 6dof controller driver for Linux
+ */
+
+/*
+ * 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, Ucitelska 1576, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/malloc.h>
+#include <linux/input.h>
+#include <linux/serio.h>
+#include <linux/init.h>
+
+/*
+ * Definitions & global arrays.
+ */
+
+#define	MAGELLAN_MAX_LENGTH	32
+
+static int magellan_buttons[] = { BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8};
+static int magellan_axes[] = { ABS_X, ABS_Y, ABS_Z, ABS_RX, ABS_RY, ABS_RZ};
+static char *magellan_name = "LogiCad3D Magellan";
+
+/*
+ * Per-Magellan data.
+ */
+
+struct magellan {
+	struct input_dev dev;
+	int idx;
+	unsigned char data[MAGELLAN_MAX_LENGTH];
+};
+
+/*
+ * magellan_crunch_nibbles() verifies that the bytes sent from the Magellan
+ * have correct upper nibbles for the lower ones, if not, the packet will
+ * be thrown away. It also strips these upper halves to simplify further
+ * processing.
+ */
+
+static int magellan_crunch_nibbles(unsigned char *data, int count)
+{
+	static unsigned char nibbles[16] = "0AB3D56GH9:K<MN?";
+
+	do {
+		if (data[count] == nibbles[data[count] & 0xf])
+			data[count] = data[count] & 0xf;
+		else
+			return -1;
+	} while (--count);
+
+	return 0;
+}
+
+static void magellan_process_packet(struct magellan* magellan)
+{
+	struct input_dev *dev = &magellan->dev;
+	unsigned char *data = magellan->data;
+	int i, t;
+
+	if (!magellan->idx) return;
+
+	switch (magellan->data[0]) {
+
+		case 'd':				/* Axis data */
+			if (magellan->idx != 25) return;
+			if (magellan_crunch_nibbles(data, 24)) return;
+			for (i = 0; i < 6; i++)
+				input_report_abs(dev, magellan_axes[i],
+					(data[(i << 2) + 1] << 12 | data[(i << 2) + 2] << 8 |
+					 data[(i << 2) + 3] <<  4 | data[(i << 2) + 4]) - 32768);
+			break;
+
+		case 'k':				/* Button data */
+			if (magellan->idx != 4) return;
+			if (magellan_crunch_nibbles(data, 3)) return;
+			t = (data[1] << 1) | (data[2] << 5) | data[3];
+			for (i = 0; i < 9; i++) input_report_key(dev, magellan_buttons[i], (t >> i) & 1);
+			break;
+	}
+}
+
+static void magellan_interrupt(struct serio *serio, unsigned char data, unsigned int flags)
+{
+	struct magellan* magellan = serio->private;
+
+	if (data == '\r') {
+		magellan_process_packet(magellan);
+		magellan->idx = 0;
+	} else {
+		if (magellan->idx < MAGELLAN_MAX_LENGTH)
+			magellan->data[magellan->idx++] = data;
+	} 
+}
+
+/*
+ * magellan_disconnect() is the opposite of magellan_connect()
+ */
+
+static void magellan_disconnect(struct serio *serio)
+{
+	struct magellan* magellan = serio->private;
+	input_unregister_device(&magellan->dev);
+	serio_close(serio);
+	kfree(magellan);
+}
+
+/*
+ * magellan_connect() is the routine that is called when someone adds a
+ * new serio device. It looks for the Magellan, and if found, registers
+ * it as an input device.
+ */
+
+static void magellan_connect(struct serio *serio, struct serio_dev *dev)
+{
+	struct magellan *magellan;
+	int i, t;
+
+	if (serio->type != (SERIO_RS232 | SERIO_MAGELLAN))
+		return;
+
+	if (!(magellan = kmalloc(sizeof(struct magellan), GFP_KERNEL)))
+		return;
+
+	memset(magellan, 0, sizeof(struct magellan));
+
+	magellan->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);	
+
+	for (i = 0; i < 9; i++)
+		set_bit(magellan_buttons[i], &magellan->dev.keybit);
+
+	for (i = 0; i < 6; i++) {
+		t = magellan_axes[i];
+		set_bit(t, magellan->dev.absbit);
+		magellan->dev.absmin[t] = -360;
+		magellan->dev.absmax[t] =  360;
+	}
+
+	magellan->dev.private = magellan;
+	magellan->dev.name = magellan_name;
+	magellan->dev.idbus = BUS_RS232;
+	magellan->dev.idvendor = SERIO_MAGELLAN;
+	magellan->dev.idproduct = 0x0001;
+	magellan->dev.idversion = 0x0100;
+	
+	serio->private = magellan;
+
+	if (serio_open(serio, dev)) {
+		kfree(magellan);
+		return;
+	}
+
+	input_register_device(&magellan->dev);
+
+	printk(KERN_INFO "input%d: %s on serio%d\n", magellan->dev.number, magellan_name, serio->number);
+}
+
+/*
+ * The serio device structure.
+ */
+
+static struct serio_dev magellan_dev = {
+	interrupt:	magellan_interrupt,
+	connect:	magellan_connect,
+	disconnect:	magellan_disconnect,
+};
+
+/*
+ * The functions for inserting/removing us as a module.
+ */
+
+int __init magellan_init(void)
+{
+	serio_register_device(&magellan_dev);
+	return 0;
+}
+
+void __exit magellan_exit(void)
+{
+	serio_unregister_device(&magellan_dev);
+}
+
+module_init(magellan_init);
+module_exit(magellan_exit);