7f4dff9a566ffd1a4c2a51fb10169e698b8aa7ff
[linux-2.6-microblaze.git] / drivers / input / joystick / joydump.c
1 /*
2  *  Copyright (c) 1996-2001 Vojtech Pavlik
3  */
4
5 /*
6  * This is just a very simple driver that can dump the data
7  * out of the joystick port into the syslog ...
8  */
9
10 /*
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU General Public License as published by
13  * the Free Software Foundation; either version 2 of the License, or
14  * (at your option) any later version.
15  *
16  * This program is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19  * GNU General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24  *
25  * Should you need to contact me, the author, you can do so either by
26  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
27  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
28  */
29
30 #include <linux/module.h>
31 #include <linux/gameport.h>
32 #include <linux/kernel.h>
33 #include <linux/delay.h>
34 #include <linux/slab.h>
35
36 #define DRIVER_DESC     "Gameport data dumper module"
37
38 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
39 MODULE_DESCRIPTION(DRIVER_DESC);
40 MODULE_LICENSE("GPL");
41
42 #define BUF_SIZE 256
43
44 struct joydump {
45         unsigned int time;
46         unsigned char data;
47 };
48
49 static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
50 {
51         struct joydump *buf;    /* all entries */
52         struct joydump *dump, *prev;    /* one entry each */
53         int axes[4], buttons;
54         int i, j, t, timeout;
55         unsigned long flags;
56         unsigned char u;
57
58         printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
59         printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
60         printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
61
62         if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
63
64                 printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
65
66                 if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
67
68                         printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
69                         printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
70                         return -ENODEV;
71                 }
72
73                 gameport_cooked_read(gameport, axes, &buttons);
74
75                 for (i = 0; i < 4; i++)
76                         printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
77                 printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
78                 printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
79         }
80
81         timeout = gameport_time(gameport, 10000); /* 10 ms */
82
83         buf = kmalloc_array(BUF_SIZE, sizeof(struct joydump), GFP_KERNEL);
84         if (!buf) {
85                 printk(KERN_INFO "joydump: no memory for testing\n");
86                 goto jd_end;
87         }
88         dump = buf;
89         t = 0;
90         i = 1;
91
92         local_irq_save(flags);
93
94         u = gameport_read(gameport);
95
96         dump->data = u;
97         dump->time = t;
98         dump++;
99
100         gameport_trigger(gameport);
101
102         while (i < BUF_SIZE && t < timeout) {
103
104                 dump->data = gameport_read(gameport);
105
106                 if (dump->data ^ u) {
107                         u = dump->data;
108                         dump->time = t;
109                         i++;
110                         dump++;
111                 }
112                 t++;
113         }
114
115         local_irq_restore(flags);
116
117 /*
118  * Dump data.
119  */
120
121         t = i;
122         dump = buf;
123         prev = dump;
124
125         printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
126         printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
127         for (j = 7; j >= 0; j--)
128                 printk("%d", (dump->data >> j) & 1);
129         printk(" |\n");
130         dump++;
131
132         for (i = 1; i < t; i++, dump++, prev++) {
133                 printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
134                         i, dump->time - prev->time);
135                 for (j = 7; j >= 0; j--)
136                         printk("%d", (dump->data >> j) & 1);
137                 printk(" |\n");
138         }
139         kfree(buf);
140
141 jd_end:
142         printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
143
144         return 0;
145 }
146
147 static void joydump_disconnect(struct gameport *gameport)
148 {
149         gameport_close(gameport);
150 }
151
152 static struct gameport_driver joydump_drv = {
153         .driver         = {
154                 .name   = "joydump",
155         },
156         .description    = DRIVER_DESC,
157         .connect        = joydump_connect,
158         .disconnect     = joydump_disconnect,
159 };
160
161 module_gameport_driver(joydump_drv);