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// 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_array(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;
}
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);
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