// SPDX-License-Identifier: GPL-2.0-or-later/* *  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 ... */ #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_objs(struct joydump, BUF_SIZE);	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;} static void joydump_disconnect(struct gameport *gameport){	gameport_close(gameport);} static struct gameport_driver joydump_drv = {	.driver		= {		.name	= "joydump",	},	.description	= DRIVER_DESC,	.connect	= joydump_connect,	.disconnect	= joydump_disconnect,}; module_gameport_driver(joydump_drv);