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
38MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
39MODULE_DESCRIPTION(DRIVER_DESC);
40MODULE_LICENSE("GPL");
41
42#define BUF_SIZE 256
43
44struct joydump {
45	unsigned int time;
46	unsigned char data;
47};
48
49static 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(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
141jd_end:
142	printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
143
144	return 0;
145}
146
147static void joydump_disconnect(struct gameport *gameport)
148{
149	gameport_close(gameport);
150}
151
152static 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
161module_gameport_driver(joydump_drv);
162