/*
- * $Id: parkbd.c,v 1.10 2002/03/13 10:09:20 vojtech Exp $
+ * Parallel port to Keyboard port adapter driver for Linux
*
- * Copyright (c) 1999-2001 Vojtech Pavlik
+ * Copyright (c) 1999-2004 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 version 2 as published by
+ * the Free Software Foundation.
*/
/*
- * 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.
+ * To connect an AT or XT keyboard to the parallel port, a fairly simple adapter
+ * can be made:
+ *
+ * Parallel port Keyboard port
*
- * 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.
+ * +5V --------------------- +5V (4)
+ *
+ * ______
+ * +5V -------|______|--.
+ * |
+ * ACK (10) ------------|
+ * |--- KBD CLOCK (5)
+ * STROBE (1) ---|<|----'
+ *
+ * ______
+ * +5V -------|______|--.
+ * |
+ * BUSY (11) -----------|
+ * |--- KBD DATA (1)
+ * AUTOFD (14) --|<|----'
*
- * 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
+ * GND (18-25) ------------- GND (3)
+ *
+ * The diodes can be fairly any type, and the resistors should be somewhere
+ * around 5 kOhm, but the adapter will likely work without the resistors,
+ * too.
*
- * 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
+ * The +5V source can be taken either from USB, from mouse or keyboard ports,
+ * or from a joystick port. Unfortunately, the parallel port of a PC doesn't
+ * have a +5V pin, and feeding the keyboard from signal pins is out of question
+ * with 300 mA power reqirement of a typical AT keyboard.
*/
#include <linux/module.h>
MODULE_DESCRIPTION("Parallel port to Keyboard port adapter driver");
MODULE_LICENSE("GPL");
-MODULE_PARM(parkbd, "1i");
-MODULE_PARM(parkbd_mode, "1i");
+static unsigned int parkbd_pp_no;
+module_param_named(port, parkbd_pp_no, int, 0);
+MODULE_PARM_DESC(port, "Parallel port the adapter is connected to (default is 0)");
+
+static unsigned int parkbd_mode = SERIO_8042;
+module_param_named(mode, parkbd_mode, uint, 0);
+MODULE_PARM_DESC(mode, "Mode of operation: XT = 0/AT = 1 (default)");
#define PARKBD_CLOCK 0x01 /* Strobe & Ack */
#define PARKBD_DATA 0x02 /* AutoFd & Busy */
-static int parkbd;
-static int parkbd_mode = SERIO_8042;
-
static int parkbd_buffer;
static int parkbd_counter;
static unsigned long parkbd_last;
static unsigned long parkbd_start;
static struct pardevice *parkbd_dev;
-
-static char parkbd_name[] = "PARKBD AT/XT keyboard adapter";
-static char parkbd_phys[32];
+static struct serio *parkbd_port;
static int parkbd_readlines(void)
{
return 0;
}
-static struct serio parkbd_port =
-{
- .write = parkbd_write,
- .name = parkbd_name,
- .phys = parkbd_phys,
-};
-
-static void parkbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static void parkbd_interrupt(int irq, void *dev_id)
{
if (parkbd_writing) {
parkbd_buffer |= (parkbd_readlines() >> 1) << parkbd_counter++;
if (parkbd_counter == parkbd_mode + 10)
- serio_interrupt(&parkbd_port, (parkbd_buffer >> (2 - parkbd_mode)) & 0xff, 0, regs);
+ serio_interrupt(parkbd_port, (parkbd_buffer >> (2 - parkbd_mode)) & 0xff, 0);
}
parkbd_last = jiffies;
{
struct parport *pp;
- if (parkbd < 0) {
- printk(KERN_ERR "parkbd: no port specified\n");
- return -ENODEV;
- }
-
- pp = parport_find_number(parkbd);
+ pp = parport_find_number(parkbd_pp_no);
if (pp == NULL) {
printk(KERN_ERR "parkbd: no such parport\n");
return 0;
}
+static struct serio * __init parkbd_allocate_serio(void)
+{
+ struct serio *serio;
+
+ serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
+ if (serio) {
+ serio->id.type = parkbd_mode;
+ serio->write = parkbd_write,
+ strlcpy(serio->name, "PARKBD AT/XT keyboard adapter", sizeof(serio->name));
+ snprintf(serio->phys, sizeof(serio->phys), "%s/serio0", parkbd_dev->port->name);
+ }
-int __init parkbd_init(void)
+ return serio;
+}
+
+static int __init parkbd_init(void)
{
- if (parkbd_getport()) return -1;
- parkbd_writelines(3);
- parkbd_port.type = parkbd_mode;
+ int err;
- sprintf(parkbd_phys, "%s/serio0", parkbd_dev->port->name);
+ err = parkbd_getport();
+ if (err)
+ return err;
+
+ parkbd_port = parkbd_allocate_serio();
+ if (!parkbd_port) {
+ parport_release(parkbd_dev);
+ return -ENOMEM;
+ }
+
+ parkbd_writelines(3);
- serio_register_port(&parkbd_port);
+ 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)
+static void __exit parkbd_exit(void)
{
parport_release(parkbd_dev);
- serio_unregister_port(&parkbd_port);
+ serio_unregister_port(parkbd_port);
parport_unregister_device(parkbd_dev);
}
git://git.onelab.eu / linux-2.6.git / blobdiff