2 * $Id: cobra.c,v 1.1.1.1 2005/04/11 02:50:21 jack Exp $
4 * Copyright (c) 1999-2000 Vojtech Pavlik
10 * Creative Labd Blaster GamePad Cobra driver for Linux
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 * Should you need to contact me, the author, you can do so either by
29 * e-mail - mail your message to <vojtech@suse.cz>, or by paper mail:
30 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/slab.h>
36 #include <linux/init.h>
37 #include <linux/gameport.h>
38 #include <linux/input.h>
40 #define COBRA_MAX_STROBE 45 /* 45 us max wait for first strobe */
41 #define COBRA_REFRESH_TIME HZ/50 /* 20 ms between reads */
42 #define COBRA_LENGTH 36
44 static char* cobra_name = "Creative Labs Blaster GamePad Cobra";
46 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 };
49 struct gameport *gameport;
50 struct timer_list timer;
51 struct input_dev dev[2];
58 static unsigned char cobra_read_packet(struct gameport *gameport, unsigned int *data)
61 unsigned char u, v, w;
66 int strobe = gameport_time(gameport, COBRA_MAX_STROBE);
68 for (i = 0; i < 2; i++) {
70 t[i] = COBRA_MAX_STROBE;
76 u = gameport_read(gameport);
80 v = gameport_read(gameport);
81 for (i = 0, w = u ^ v; i < 2 && w; i++, w >>= 2)
83 if ((w & 0x30) < 0x30 && r[i] < COBRA_LENGTH && t[i] > 0) {
84 buf[i] |= (__u64)((w >> 5) & 1) << r[i]++;
89 } while (t[0] > 0 || t[1] > 0);
91 __restore_flags(flags);
95 for (i = 0; i < 2; i++) {
97 if (r[i] != COBRA_LENGTH) continue;
99 for (j = 0; j < COBRA_LENGTH && (buf[i] & 0x04104107f) ^ 0x041041040; j++)
100 buf[i] = (buf[i] >> 1) | ((__u64)(buf[i] & 1) << (COBRA_LENGTH - 1));
102 if (j < COBRA_LENGTH) ret |= (1 << i);
104 data[i] = ((buf[i] >> 7) & 0x000001f) | ((buf[i] >> 8) & 0x00003e0)
105 | ((buf[i] >> 9) & 0x0007c00) | ((buf[i] >> 10) & 0x00f8000)
106 | ((buf[i] >> 11) & 0x1f00000);
113 static void cobra_timer(unsigned long private)
115 struct cobra *cobra = (void *) private;
116 struct input_dev *dev;
117 unsigned int data[2];
122 if ((r = cobra_read_packet(cobra->gameport, data)) != cobra->exists)
125 for (i = 0; i < 2; i++)
126 if (cobra->exists & r & (1 << i)) {
128 dev = cobra->dev + i;
130 input_report_abs(dev, ABS_X, ((data[i] >> 4) & 1) - ((data[i] >> 3) & 1));
131 input_report_abs(dev, ABS_Y, ((data[i] >> 2) & 1) - ((data[i] >> 1) & 1));
133 for (j = 0; cobra_btn[j]; j++)
134 input_report_key(dev, cobra_btn[j], data[i] & (0x20 << j));
138 mod_timer(&cobra->timer, jiffies + COBRA_REFRESH_TIME);
141 static int cobra_open(struct input_dev *dev)
143 struct cobra *cobra = dev->private;
145 mod_timer(&cobra->timer, jiffies + COBRA_REFRESH_TIME);
149 static void cobra_close(struct input_dev *dev)
151 struct cobra *cobra = dev->private;
153 del_timer(&cobra->timer);
156 static void cobra_connect(struct gameport *gameport, struct gameport_dev *dev)
159 unsigned int data[2];
162 if (!(cobra = kmalloc(sizeof(struct cobra), GFP_KERNEL)))
164 memset(cobra, 0, sizeof(struct cobra));
166 gameport->private = cobra;
168 cobra->gameport = gameport;
169 init_timer(&cobra->timer);
170 cobra->timer.data = (long) cobra;
171 cobra->timer.function = cobra_timer;
173 if (gameport_open(gameport, dev, GAMEPORT_MODE_RAW))
176 cobra->exists = cobra_read_packet(gameport, data);
178 for (i = 0; i < 2; i++)
179 if ((cobra->exists >> i) & data[i] & 1) {
180 printk(KERN_WARNING "cobra.c: Device on gameport%d.%d has the Ext bit set. ID is: %d"
181 " Contact vojtech@suse.cz\n", gameport->number, i, (data[i] >> 2) & 7);
182 cobra->exists &= ~(1 << i);
188 for (i = 0; i < 2; i++)
189 if ((cobra->exists >> i) & 1) {
191 cobra->dev[i].private = cobra;
192 cobra->dev[i].open = cobra_open;
193 cobra->dev[i].close = cobra_close;
195 cobra->dev[i].name = cobra_name;
196 cobra->dev[i].idbus = BUS_GAMEPORT;
197 cobra->dev[i].idvendor = GAMEPORT_ID_VENDOR_CREATIVE;
198 cobra->dev[i].idproduct = 0x0008;
199 cobra->dev[i].idversion = 0x0100;
201 cobra->dev[i].evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
202 cobra->dev[i].absbit[0] = BIT(ABS_X) | BIT(ABS_Y);
204 for (j = 0; cobra_btn[j]; j++)
205 set_bit(cobra_btn[j], cobra->dev[i].keybit);
207 cobra->dev[i].absmin[ABS_X] = -1; cobra->dev[i].absmax[ABS_X] = 1;
208 cobra->dev[i].absmin[ABS_Y] = -1; cobra->dev[i].absmax[ABS_Y] = 1;
210 input_register_device(cobra->dev + i);
211 printk(KERN_INFO "input%d: %s on gameport%d.%d\n",
212 cobra->dev[i].number, cobra_name, gameport->number, i);
217 fail2: gameport_close(gameport);
221 static void cobra_disconnect(struct gameport *gameport)
225 struct cobra *cobra = gameport->private;
226 for (i = 0; i < 2; i++)
227 if ((cobra->exists >> i) & 1)
228 input_unregister_device(cobra->dev + i);
229 gameport_close(gameport);
233 static struct gameport_dev cobra_dev = {
234 connect: cobra_connect,
235 disconnect: cobra_disconnect,
238 int __init cobra_init(void)
240 gameport_register_device(&cobra_dev);
244 void __exit cobra_exit(void)
246 gameport_unregister_device(&cobra_dev);
249 module_init(cobra_init);
250 module_exit(cobra_exit);
252 MODULE_LICENSE("GPL");