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 39MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); 40MODULE_DESCRIPTION(DRIVER_DESC); 41MODULE_LICENSE("GPL"); 42 43#define BUF_SIZE 256 44 45struct joydump { 46 unsigned int time; 47 unsigned char data; 48}; 49 50static 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 142jd_end: 143 printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); 144 145 return 0; 146} 147 148static void joydump_disconnect(struct gameport *gameport) 149{ 150 gameport_close(gameport); 151} 152 153static 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 162static int __init joydump_init(void) 163{ 164 return gameport_register_driver(&joydump_drv); 165} 166 167static void __exit joydump_exit(void) 168{ 169 gameport_unregister_driver(&joydump_drv); 170} 171 172module_init(joydump_init); 173module_exit(joydump_exit); 174