cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/joystick/joydump.c

/*
 *  Copyright (c) 1996-2001 Vojtech Pavlik
 */

/*
 * This is just a very simple driver that can dump the data
 * out of the joystick port into the syslog ...
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

#include <linux/module.h>
#include <linux/gameport.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/slab.h>


#define DRIVER_DESC	"Gameport data dumper module"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");


#define BUF_SIZE 256


struct joydump {
	
unsigned int time;
	
unsigned char data;
};


static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv) { struct joydump *buf; /* all entries */ struct joydump *dump, *prev; /* one entry each */ int axes[4], buttons; int i, j, t, timeout; unsigned long flags; unsigned char u; printk(KERN_INFO "joydump: ,------------------ START ----------------.\n"); printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys); printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed); if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) { printk(KERN_INFO "joydump: | Raw mode not available - trying cooked. |\n"); if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) { printk(KERN_INFO "joydump: | Cooked not available either. Failing. |\n"); printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); return -ENODEV; } gameport_cooked_read(gameport, axes, &buttons); for (i = 0; i < 4; i++) printk(KERN_INFO "joydump: | Axis %d: %4d. |\n", i, axes[i]); printk(KERN_INFO "joydump: | Buttons %02x. |\n", buttons); printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); } timeout = gameport_time(gameport, 10000); /* 10 ms */ buf = kmalloc(BUF_SIZE * sizeof(struct joydump), GFP_KERNEL); if (!buf) { printk(KERN_INFO "joydump: no memory for testing\n"); goto jd_end; } dump = buf; t = 0; i = 1; local_irq_save(flags); u = gameport_read(gameport); dump->data = u; dump->time = t; dump++; gameport_trigger(gameport); while (i < BUF_SIZE && t < timeout) { dump->data = gameport_read(gameport); if (dump->data ^ u) { u = dump->data; dump->time = t; i++; dump++; } t++; } local_irq_restore(flags); /* * Dump data. */ t = i; dump = buf; prev = dump; printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n"); printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0); for (j = 7; j >= 0; j--) printk("%d", (dump->data >> j) & 1); printk(" |\n"); dump++; for (i = 1; i < t; i++, dump++, prev++) { printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", i, dump->time - prev->time); for (j = 7; j >= 0; j--) printk("%d", (dump->data >> j) & 1); printk(" |\n"); } kfree(buf); jd_end: printk(KERN_INFO "joydump: `------------------- END -----------------'\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Brad Hards35174.21%116.67%
Randy Dunlap9820.72%233.33%
Dmitry Torokhov122.54%233.33%
Vojtech Pavlik122.54%116.67%
Total473100.00%6100.00%


static void joydump_disconnect(struct gameport *gameport) { gameport_close(gameport); }

Contributors

PersonTokensPropCommitsCommitProp
Brad Hards16100.00%1100.00%
Total16100.00%1100.00%

static struct gameport_driver joydump_drv = { .driver = { .name = "joydump", }, .description = DRIVER_DESC, .connect = joydump_connect, .disconnect = joydump_disconnect, }; module_gameport_driver(joydump_drv);

Overall Contributors

PersonTokensPropCommitsCommitProp
Brad Hards42773.62%19.09%
Randy Dunlap9816.90%218.18%
Dmitry Torokhov356.03%327.27%
Vojtech Pavlik162.76%218.18%
Axel Lin20.34%19.09%
Adrian Bunk10.17%19.09%
Tim Schmielau10.17%19.09%
Total580100.00%11100.00%
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