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/drivers/input/joystick/joydump.c

https://bitbucket.org/evzijst/gittest
C | 175 lines | 108 code | 36 blank | 31 comment | 10 complexity | b5acae8a1c641c699d2610b4d9290ced MD5 | raw file
  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
 38#define DRIVER_DESC	"Gameport data dumper module"
 39
 40MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 41MODULE_DESCRIPTION(DRIVER_DESC);
 42MODULE_LICENSE("GPL");
 43
 44#define BUF_SIZE 256
 45
 46struct joydump {
 47	unsigned int time;
 48	unsigned char data;
 49};
 50
 51static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
 52{
 53	struct joydump *buf;	/* all entries */
 54	struct joydump *dump, *prev;	/* one entry each */
 55	int axes[4], buttons;
 56	int i, j, t, timeout;
 57	unsigned long flags;
 58	unsigned char u;
 59
 60	printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
 61	printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
 62	printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
 63
 64	if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
 65
 66		printk(KERN_INFO "joydump: | Raw mode not available - trying cooked.    |\n");
 67
 68		if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
 69
 70			printk(KERN_INFO "joydump: | Cooked not available either. Failing.   |\n");
 71			printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
 72			return -ENODEV;
 73		}
 74
 75		gameport_cooked_read(gameport, axes, &buttons);
 76
 77		for (i = 0; i < 4; i++)
 78			printk(KERN_INFO "joydump: | Axis %d: %4d.                           |\n", i, axes[i]);
 79		printk(KERN_INFO "joydump: | Buttons %02x.                             |\n", buttons);
 80		printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
 81	}
 82
 83	timeout = gameport_time(gameport, 10000); /* 10 ms */
 84
 85	buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL);
 86	if (!buf) {
 87		printk(KERN_INFO "joydump: no memory for testing\n");
 88		goto jd_end;
 89	}
 90	dump = buf;
 91	t = 0;
 92	i = 1;
 93
 94	local_irq_save(flags);
 95
 96	u = gameport_read(gameport);
 97
 98	dump->data = u;
 99	dump->time = t;
100	dump++;
101
102	gameport_trigger(gameport);
103
104	while (i < BUF_SIZE && t < timeout) {
105
106		dump->data = gameport_read(gameport);
107
108		if (dump->data ^ u) {
109			u = dump->data;
110			dump->time = t;
111			i++;
112			dump++;
113		}
114		t++;
115	}
116
117	local_irq_restore(flags);
118
119/*
120 * Dump data.
121 */
122
123	t = i;
124	dump = buf;
125	prev = dump;
126
127	printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
128	printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
129	for (j = 7; j >= 0; j--)
130		printk("%d", (dump->data >> j) & 1);
131	printk(" |\n");
132	dump++;
133
134	for (i = 1; i < t; i++, dump++, prev++) {
135		printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
136			i, dump->time - prev->time);
137		for (j = 7; j >= 0; j--)
138			printk("%d", (dump->data >> j) & 1);
139		printk(" |\n");
140	}
141	kfree(buf);
142
143jd_end:
144	printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
145
146	return 0;
147}
148
149static void joydump_disconnect(struct gameport *gameport)
150{
151	gameport_close(gameport);
152}
153
154static struct gameport_driver joydump_drv = {
155	.driver		= {
156		.name	= "joydump",
157	},
158	.description	= DRIVER_DESC,
159	.connect	= joydump_connect,
160	.disconnect	= joydump_disconnect,
161};
162
163static int __init joydump_init(void)
164{
165	gameport_register_driver(&joydump_drv);
166	return 0;
167}
168
169static void __exit joydump_exit(void)
170{
171	gameport_unregister_driver(&joydump_drv);
172}
173
174module_init(joydump_init);
175module_exit(joydump_exit);