146 lines
3.2 KiB
C
146 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 1996-2001 Vojtech Pavlik
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*/
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/*
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* This is just a very simple driver that can dump the data
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* out of the joystick port into the syslog ...
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*/
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/*
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*/
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#include <linux/module.h>
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#include <linux/gameport.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#define DRIVER_DESC "Gameport data dumper module"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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#define BUF_SIZE 256
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struct joydump {
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unsigned int time;
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unsigned char data;
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};
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static int joydump_connect(struct gameport *gameport, struct gameport_driver *drv)
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{
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struct joydump *buf; /* all entries */
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struct joydump *dump, *prev; /* one entry each */
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int axes[4], buttons;
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int i, j, t, timeout;
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unsigned long flags;
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unsigned char u;
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printk(KERN_INFO "joydump: ,------------------ START ----------------.\n");
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printk(KERN_INFO "joydump: | Dumping: %30s |\n", gameport->phys);
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printk(KERN_INFO "joydump: | Speed: %28d kHz |\n", gameport->speed);
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if (gameport_open(gameport, drv, GAMEPORT_MODE_RAW)) {
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printk(KERN_INFO "joydump: | Raw mode not available - trying cooked. |\n");
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if (gameport_open(gameport, drv, GAMEPORT_MODE_COOKED)) {
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printk(KERN_INFO "joydump: | Cooked not available either. Failing. |\n");
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printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
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return -ENODEV;
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}
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gameport_cooked_read(gameport, axes, &buttons);
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for (i = 0; i < 4; i++)
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printk(KERN_INFO "joydump: | Axis %d: %4d. |\n", i, axes[i]);
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printk(KERN_INFO "joydump: | Buttons %02x. |\n", buttons);
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printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
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}
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timeout = gameport_time(gameport, 10000); /* 10 ms */
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buf = kmalloc_array(BUF_SIZE, sizeof(struct joydump), GFP_KERNEL);
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if (!buf) {
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printk(KERN_INFO "joydump: no memory for testing\n");
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goto jd_end;
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}
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dump = buf;
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t = 0;
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i = 1;
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local_irq_save(flags);
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u = gameport_read(gameport);
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dump->data = u;
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dump->time = t;
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dump++;
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gameport_trigger(gameport);
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while (i < BUF_SIZE && t < timeout) {
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dump->data = gameport_read(gameport);
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if (dump->data ^ u) {
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u = dump->data;
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dump->time = t;
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i++;
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dump++;
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}
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t++;
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}
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local_irq_restore(flags);
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/*
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* Dump data.
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*/
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t = i;
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dump = buf;
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prev = dump;
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printk(KERN_INFO "joydump: >------------------ DATA -----------------<\n");
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printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ", 0, 0);
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for (j = 7; j >= 0; j--)
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printk("%d", (dump->data >> j) & 1);
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printk(" |\n");
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dump++;
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for (i = 1; i < t; i++, dump++, prev++) {
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printk(KERN_INFO "joydump: | index: %3d delta: %3d us data: ",
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i, dump->time - prev->time);
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for (j = 7; j >= 0; j--)
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printk("%d", (dump->data >> j) & 1);
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printk(" |\n");
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}
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kfree(buf);
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jd_end:
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printk(KERN_INFO "joydump: `------------------- END -----------------'\n");
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return 0;
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}
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static void joydump_disconnect(struct gameport *gameport)
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{
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gameport_close(gameport);
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}
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static struct gameport_driver joydump_drv = {
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.driver = {
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.name = "joydump",
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},
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.description = DRIVER_DESC,
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.connect = joydump_connect,
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.disconnect = joydump_disconnect,
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};
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module_gameport_driver(joydump_drv);
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