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

• Lines: 251
• Date: Wed Jun 21 08:22:21 2000
• Orig file: v2.4.0-test1/linux/drivers/char/joystick/cobra.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test1/linux/drivers/char/joystick/cobra.c linux/drivers/char/joystick/cobra.c
@@ -0,0 +1,250 @@
+/*
+ * $Id: cobra.c,v 1.10 2000/06/08 10:23:45 vojtech Exp $
+ *
+ *  Copyright (c) 1999-2000 Vojtech Pavlik
+ *
+ *  Sponsored by SuSE
+ */
+
+/*
+ * Creative Labd Blaster GamePad Cobra 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@suse.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/init.h>
+#include <linux/gameport.h>
+#include <linux/input.h>
+
+#define COBRA_MAX_STROBE	45	/* 45 us max wait for first strobe */
+#define COBRA_REFRESH_TIME	HZ/50	/* 20 ms between reads */
+#define COBRA_LENGTH		36
+
+static char* cobra_name = "Creative Labs Blaster GamePad Cobra";
+
+static int cobra_btn[] = { BTN_START, BTN_SELECT, BTN_TL, BTN_TR, BTN_X, BTN_Y, BTN_Z, BTN_A, BTN_B, BTN_C, BTN_TL2, BTN_TR2, 0 };
+
+struct cobra {
+	struct gameport *gameport;
+	struct timer_list timer;
+	struct input_dev dev[2];
+	int used;
+	int reads;
+	int bads;
+	unsigned char exists;
+};
+
+static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data)
+{
+	unsigned long flags;
+	unsigned char u, v, w;
+	__u64 buf[2];
+	int r[2], t[2];
+	int i, j, ret;
+
+	int strobe = gameport_time(gameport, COBRA_MAX_STROBE);
+
+	for (i = 0; i < 2; i++) {
+		r[i] = buf[i] = 0;
+		t[i] = COBRA_MAX_STROBE;
+	}
+	
+	__save_flags(flags);
+	__cli();
+
+	u = gameport_read(gameport);
+
+	do {
+		t[0]--; t[1]--;
+		v = gameport_read(gameport);
+		for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
+			if (w & 0x30) {
+				if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
+					buf[i] |= (__u64)((w >> 5) & 1) << r[i]++;
+					t[i] = strobe;
+					u = v;
+				} else t[i] = 0;
+			}
+	} while (t[0] > 0 || t[1] > 0);
+
+	__restore_flags(flags);
+
+	ret = 0;
+
+	for (i = 0; i < 2; i++) {
+
+		if (r[i] != COBRA_LENGTH) continue;
+
+		for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
+			buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));
+
+		if (j < COBRA_LENGTH) ret |= (1 << i);
+
+		data[i] = ((buf[i] >>  7) & 0x000001f) | ((buf[i] >>  8) & 0x00003e0)
+			| ((buf[i] >>  9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000)
+			| ((buf[i] >> 11) & 0x1f00000);
+
+	}
+
+	return ret;
+}
+
+static void cobra_timer(unsigned long private)
+{
+	struct cobra *cobra = (void *) private;
+	struct input_dev *dev;
+	unsigned int data[2];
+	int i, j, r;
+
+	cobra->reads++;
+
+	if ((r = cobra_read_packet(cobra->gameport, data)) != cobra->exists)
+		cobra->bads++;
+
+	for (i = 0; i < 2; i++)
+		if (cobra->exists & r & (1 << i)) {
+
+			dev = cobra->dev + i;
+
+			input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
+			input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));
+
+			for (j = 0; cobra_btn[j]; j++)
+				input_report_key(dev, cobra_btn[j], data[i] & (0x20 << i));
+
+		}
+
+	mod_timer(&cobra->timer, jiffies + COBRA_REFRESH_TIME);	
+}
+
+static int cobra_open(struct input_dev *dev)
+{
+	struct cobra *cobra = dev->private;
+	if (!cobra->used++)
+		mod_timer(&cobra->timer, jiffies + COBRA_REFRESH_TIME);	
+	return 0;
+}
+
+static void cobra_close(struct input_dev *dev)
+{
+	struct cobra *cobra = dev->private;
+	if (!--cobra->used)
+		del_timer(&cobra->timer);
+}
+
+static void cobra_connect(struct gameport *gameport, struct gameport_dev *dev)
+{
+	struct cobra *cobra;
+	unsigned int data[2];
+	int i, j;
+
+	if (!(cobra = kmalloc(sizeof(struct cobra), GFP_KERNEL)))
+		return;
+	memset(cobra, 0, sizeof(struct cobra));
+
+	gameport->private = cobra;
+
+	cobra->gameport = gameport;
+	init_timer(&cobra->timer);
+	cobra->timer.data = (long) cobra;
+	cobra->timer.function = cobra_timer;
+
+	if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
+		goto fail1;
+
+	cobra->exists = cobra_read_packet(gameport, data);
+
+	for (i = 0; i < 2; i++) 
+		if ((cobra->exists >> i) & data[i] & 1) {
+			printk(KERN_WARNING "cobra.c: Device on gameport%d.%d has the Ext bit set. ID is: %d"
+				" Contact vojtech@suse.cz\n", gameport->number, i, (data[i] >> 2) & 7);
+			cobra->exists &= ~(1 << i);
+		}
+
+	if (!cobra->exists)
+		goto fail2;
+
+	for (i = 0; i < 2; i++)
+		if ((cobra->exists >> i) & 1) {
+
+			cobra->dev[i].private = cobra;
+			cobra->dev[i].open = cobra_open;
+			cobra->dev[i].close = cobra_close;
+
+			cobra->dev[i].name = cobra_name;
+			cobra->dev[i].idbus = BUS_GAMEPORT;
+			cobra->dev[i].idvendor = GAMEPORT_ID_VENDOR_CREATIVE;
+			cobra->dev[i].idproduct = 0x0008;
+			cobra->dev[i].idversion = 0x0100;
+		
+			cobra->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+			cobra->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
+
+			for (j = 0; cobra_btn[j]; j++)
+				set_bit(cobra_btn[j], cobra->dev[i].keybit);
+
+			cobra->dev[i].absmin[ABS_X] = -1; cobra->dev[i].absmax[ABS_X] = 1;
+			cobra->dev[i].absmin[ABS_Y] = -1; cobra->dev[i].absmax[ABS_Y] = 1;
+
+			input_register_device(cobra->dev + i);
+			printk(KERN_INFO "input%d: %s on gameport%d.%d\n",
+				cobra->dev[i].number, cobra_name, gameport->number, i);
+		}
+
+
+	return;
+fail2:	gameport_close(gameport);
+fail1:	kfree(cobra);
+}
+
+static void cobra_disconnect(struct gameport *gameport)
+{
+	int i;
+
+	struct cobra *cobra = gameport->private;
+	for (i = 0; i < 2; i++)
+		if ((cobra->exists >> i) & 1)
+			input_unregister_device(cobra->dev + i);
+	gameport_close(gameport);
+	kfree(cobra);
+}
+
+static struct gameport_dev cobra_dev = {
+	connect:	cobra_connect,
+	disconnect:	cobra_disconnect,
+};
+
+int __init cobra_init(void)
+{
+	gameport_register_device(&cobra_dev);
+	return 0;
+}
+
+void __exit cobra_exit(void)
+{
+	gameport_unregister_device(&cobra_dev);
+}
+
+module_init(cobra_init);
+module_exit(cobra_exit);