xref: /openbmc/linux/drivers/input/joystick/joydump.c (revision e23feb16)
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/init.h>
35 #include <linux/slab.h>
36 
37 #define DRIVER_DESC	"Gameport data dumper module"
38 
39 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
40 MODULE_DESCRIPTION(DRIVER_DESC);
41 MODULE_LICENSE("GPL");
42 
43 #define BUF_SIZE 256
44 
45 struct joydump {
46 	unsigned int time;
47 	unsigned char data;
48 };
49 
50 static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
51 {
52 	struct joydump *buf;	/* all entries */
53 	struct joydump *dump, *prev;	/* one entry each */
54 	int axes[4], buttons;
55 	int i, j, t, timeout;
56 	unsigned long flags;
57 	unsigned char u;
58 
59 	printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
60 	printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
61 	printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
62 
63 	if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
64 
65 		printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
66 
67 		if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
68 
69 			printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
70 			printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
71 			return -ENODEV;
72 		}
73 
74 		gameport_cooked_read(gameport, axes, &buttons);
75 
76 		for (i = 0; i < 4; i++)
77 			printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
78 		printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
79 		printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
80 	}
81 
82 	timeout = gameport_time(gameport, 10000); /* 10 ms */
83 
84 	buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);
85 	if (!buf) {
86 		printk(KERN_INFO "joydump: no memory for testing\n");
87 		goto jd_end;
88 	}
89 	dump = buf;
90 	t = 0;
91 	i = 1;
92 
93 	local_irq_save(flags);
94 
95 	u = gameport_read(gameport);
96 
97 	dump->data = u;
98 	dump->time = t;
99 	dump++;
100 
101 	gameport_trigger(gameport);
102 
103 	while (i < BUF_SIZE && t < timeout) {
104 
105 		dump->data = gameport_read(gameport);
106 
107 		if (dump->data ^ u) {
108 			u = dump->data;
109 			dump->time = t;
110 			i++;
111 			dump++;
112 		}
113 		t++;
114 	}
115 
116 	local_irq_restore(flags);
117 
118 /*
119  * Dump data.
120  */
121 
122 	t = i;
123 	dump = buf;
124 	prev = dump;
125 
126 	printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
127 	printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
128 	for (j = 7; j >= 0; j--)
129 		printk("%d", (dump->data >> j) & 1);
130 	printk(" |\n");
131 	dump++;
132 
133 	for (i = 1; i < t; i++, dump++, prev++) {
134 		printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
135 			i, dump->time - prev->time);
136 		for (j = 7; j >= 0; j--)
137 			printk("%d", (dump->data >> j) & 1);
138 		printk(" |\n");
139 	}
140 	kfree(buf);
141 
142 jd_end:
143 	printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
144 
145 	return 0;
146 }
147 
148 static void joydump_disconnect(struct gameport *gameport)
149 {
150 	gameport_close(gameport);
151 }
152 
153 static struct gameport_driver joydump_drv = {
154 	.driver		= {
155 		.name	= "joydump",
156 	},
157 	.description	= DRIVER_DESC,
158 	.connect	= joydump_connect,
159 	.disconnect	= joydump_disconnect,
160 };
161 
162 module_gameport_driver(joydump_drv);
163