Input: drivers/joystick - fix various sparse warnings
[linux-2.6.git] / drivers / input / joystick / joydump.c
1 /*
2  * $Id: joydump.c,v 1.1 2002/01/23 06:56:16 jsimmons Exp $
3  *
4  *  Copyright (c) 1996-2001 Vojtech Pavlik
5  */
6
7 /*
8  * This is just a very simple driver that can dump the data
9  * out of the joystick port into the syslog ...
10  */
11
12 /*
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License as published by
15  * the Free Software Foundation; either version 2 of the License, or
16  * (at your option) any later version.
17  *
18  * This program is distributed in the hope that it will be useful,
19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21  * GNU General Public License for more details.
22  *
23  * You should have received a copy of the GNU General Public License
24  * along with this program; if not, write to the Free Software
25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26  *
27  * Should you need to contact me, the author, you can do so either by
28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
30  */
31
32 #include <linux/module.h>
33 #include <linux/gameport.h>
34 #include <linux/kernel.h>
35 #include <linux/delay.h>
36 #include <linux/init.h>
37 #include <linux/slab.h>
38
39 #define DRIVER_DESC     "Gameport data dumper module"
40
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
42 MODULE_DESCRIPTION(DRIVER_DESC);
43 MODULE_LICENSE("GPL");
44
45 #define BUF_SIZE 256
46
47 struct joydump {
48         unsigned int time;
49         unsigned char data;
50 };
51
52 static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
53 {
54         struct joydump *buf;    /* all entries */
55         struct joydump *dump, *prev;    /* one entry each */
56         int axes[4], buttons;
57         int i, j, t, timeout;
58         unsigned long flags;
59         unsigned char u;
60
61         printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
62         printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
63         printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
64
65         if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
66
67                 printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
68
69                 if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
70
71                         printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
72                         printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
73                         return -ENODEV;
74                 }
75
76                 gameport_cooked_read(gameport, axes, &buttons);
77
78                 for (i = 0; i < 4; i++)
79                         printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
80                 printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
81                 printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
82         }
83
84         timeout = gameport_time(gameport, 10000); /* 10 ms */
85
86         buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);
87         if (!buf) {
88                 printk(KERN_INFO "joydump: no memory for testing\n");
89                 goto jd_end;
90         }
91         dump = buf;
92         t = 0;
93         i = 1;
94
95         local_irq_save(flags);
96
97         u = gameport_read(gameport);
98
99         dump->data = u;
100         dump->time = t;
101         dump++;
102
103         gameport_trigger(gameport);
104
105         while (i < BUF_SIZE && t < timeout) {
106
107                 dump->data = gameport_read(gameport);
108
109                 if (dump->data ^ u) {
110                         u = dump->data;
111                         dump->time = t;
112                         i++;
113                         dump++;
114                 }
115                 t++;
116         }
117
118         local_irq_restore(flags);
119
120 /*
121  * Dump data.
122  */
123
124         t = i;
125         dump = buf;
126         prev = dump;
127
128         printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
129         printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
130         for (j = 7; j >= 0; j--)
131                 printk("%d", (dump->data >> j) & 1);
132         printk(" |\n");
133         dump++;
134
135         for (i = 1; i < t; i++, dump++, prev++) {
136                 printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
137                         i, dump->time - prev->time);
138                 for (j = 7; j >= 0; j--)
139                         printk("%d", (dump->data >> j) & 1);
140                 printk(" |\n");
141         }
142         kfree(buf);
143
144 jd_end:
145         printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
146
147         return 0;
148 }
149
150 static void joydump_disconnect(struct gameport *gameport)
151 {
152         gameport_close(gameport);
153 }
154
155 static struct gameport_driver joydump_drv = {
156         .driver         = {
157                 .name   = "joydump",
158         },
159         .description    = DRIVER_DESC,
160         .connect        = joydump_connect,
161         .disconnect     = joydump_disconnect,
162 };
163
164 static int __init joydump_init(void)
165 {
166         gameport_register_driver(&joydump_drv);
167         return 0;
168 }
169
170 static void __exit joydump_exit(void)
171 {
172         gameport_unregister_driver(&joydump_drv);
173 }
174
175 module_init(joydump_init);
176 module_exit(joydump_exit);