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From: James S. <jsi...@us...> - 2002-01-22 19:16:48
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Update of /cvsroot/linuxconsole/ruby/linux/drivers/input/serio
In directory usw-pr-cvs1:/tmp/cvs-serv10049
Added Files:
Tag: 1.8
parkbd.c
Log Message:
moving stuff around.
--- NEW FILE: parkbd.c ---
/*
* $Id: parkbd.c,v 1.8 2002/01/22 19:16:44 jsimmons Exp $
*
* Copyright (c) 1999-2001 Vojtech Pavlik
*/
/*
* Parallel port to Keyboard port adapter driver for Linux
*/
/*
* 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 <vo...@uc...>, or by paper mail:
* Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
*/
#include <linux/module.h>
#include <linux/parport.h>
#include <linux/init.h>
#include <linux/serio.h>
MODULE_AUTHOR("Vojtech Pavlik <vo...@uc...>");
MODULE_DESCRIPTION("Parallel port to Keyboard port adapter driver");
MODULE_LICENSE("GPL");
MODULE_PARM(parkbd, "1i");
MODULE_PARM(parkbd_mode, "1i");
#define PARKBD_CLOCK 0x01 /* Strobe & Ack */
#define PARKBD_DATA 0x02 /* AutoFd & Busy */
static int parkbd = 0;
static int parkbd_mode = SERIO_8042;
static int parkbd_buffer = 0;
static int parkbd_counter = 0;
static int parkbd_last = 0;
static int parkbd_writing = 0;
static unsigned long parkbd_start = 0;
static struct pardevice *parkbd_dev;
static char parkbd_name[] = "PARKBD AT/XT keyboard adapter";
static char parkbd_phys[32];
static int parkbd_readlines(void)
{
return (parport_read_status(parkbd_dev->port) >> 6) ^ 2;
}
static void parkbd_writelines(int data)
{
parport_write_control(parkbd_dev->port, (~data & 3) | 0x10);
}
static int parkbd_write(struct serio *port, unsigned char c)
{
unsigned char p;
if (!parkbd_mode) return -1;
p = c ^ (c >> 4);
p = p ^ (p >> 2);
p = p ^ (p >> 1);
parkbd_counter = 0;
parkbd_writing = 1;
parkbd_buffer = c | (((int) (~p & 1)) << 8) | 0x600;
parkbd_writelines(2);
return 0;
}
static int parkbd_open(struct serio *port)
{
return 0;
}
static void parkbd_close(struct serio *port)
{
}
static struct serio parkbd_port =
{
write: parkbd_write,
open: parkbd_open,
close: parkbd_close,
name: parkbd_name,
phys: parkbd_phys,
};
static void parkbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
if (parkbd_writing) {
if (parkbd_counter && ((parkbd_counter == 11) || (jiffies - parkbd_last > 1))) {
parkbd_counter = 0;
parkbd_buffer = 0;
parkbd_writing = 0;
parkbd_writelines(3);
return;
}
parkbd_writelines(((parkbd_buffer >> parkbd_counter++) & 1) | 2);
if (parkbd_counter == 11) {
parkbd_counter = 0;
parkbd_buffer = 0;
parkbd_writing = 0;
parkbd_writelines(3);
}
} else {
if ((parkbd_counter == parkbd_mode + 10) || (jiffies - parkbd_last > 1)) {
parkbd_counter = 0;
parkbd_buffer = 0;
}
parkbd_buffer |= (parkbd_readlines() >> 1) << parkbd_counter++;
if (parkbd_counter == parkbd_mode + 10) {
if (parkbd_port.dev)
parkbd_port.dev->interrupt(&parkbd_port, (parkbd_buffer >> (2 - parkbd_mode)) & 0xff, 0);
}
}
parkbd_last = jiffies;
}
static int parkbd_getport(void)
{
struct parport *pp;
if (parkbd < 0) {
printk(KERN_ERR "parkbd: no port specified\n");
return -ENODEV;
}
for (pp = parport_enumerate(); pp != NULL && (parkbd > 0); pp = pp->next) parkbd--;
if (pp == NULL) {
printk(KERN_ERR "parkbd: no such parport\n");
return -ENODEV;
}
parkbd_dev = parport_register_device(pp, "parkbd", NULL, NULL, parkbd_interrupt, PARPORT_DEV_EXCL, NULL);
if (!parkbd_dev)
return -ENODEV;
if (parport_claim(parkbd_dev)) {
parport_unregister_device(parkbd_dev);
return -EBUSY;
}
parkbd_start = jiffies;
return 0;
}
int __init parkbd_init(void)
{
if (parkbd_getport()) return -1;
parkbd_writelines(3);
parkbd_port.type = parkbd_mode;
sprintf(parkbd_phys, "%s/serio0", parkbd_dev->port->name);
serio_register_port(&parkbd_port);
printk(KERN_INFO "serio: PARKBD %s adapter on %s\n",
parkbd_mode ? "AT" : "XT", parkbd_dev->port->name);
return 0;
}
void __exit parkbd_exit(void)
{
parport_release(parkbd_dev);
serio_unregister_port(&parkbd_port);
parport_unregister_device(parkbd_dev);
}
module_init(parkbd_init);
module_exit(parkbd_exit);
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