xtkbd.c 4.35 KB
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/*
 * $Id: xtkbd.c,v 1.11 2001/09/25 10:12:07 vojtech Exp $
 *
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 */

/*
 * XT keyboard 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
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * 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.
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 *
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 * 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
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 *
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 * 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
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/serio.h>

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#define DRIVER_DESC	"XT keyboard driver"

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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");

#define XTKBD_EMUL0	0xe0
#define XTKBD_EMUL1	0xe1
#define XTKBD_KEY	0x7f
#define XTKBD_RELEASE	0x80

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static unsigned char xtkbd_keycode[256] = {
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	  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
	 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
	 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
	 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
	 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
	 80, 81, 82, 83,  0,  0,  0, 87, 88,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0, 87, 88,  0,  0,  0,  0,110,111,103,108,105,
	106
};

static char *xtkbd_name = "XT Keyboard";

struct xtkbd {
	unsigned char keycode[256];
	struct input_dev dev;
	struct serio *serio;
	char phys[32];
};

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irqreturn_t xtkbd_interrupt(struct serio *serio,
	unsigned char data, unsigned int flags, struct pt_regs *regs)
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{
	struct xtkbd *xtkbd = serio->private;

	switch (data) {
		case XTKBD_EMUL0:
		case XTKBD_EMUL1:
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			break;
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		default:

			if (xtkbd->keycode[data & XTKBD_KEY]) {
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				input_regs(&xtkbd->dev, regs);
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				input_report_key(&xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));
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				input_sync(&xtkbd->dev);
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			} else {
				printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",
					data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");
			}
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	}
	return IRQ_HANDLED;
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}

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void xtkbd_connect(struct serio *serio, struct serio_driver *drv)
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{
	struct xtkbd *xtkbd;
	int i;

	if ((serio->type & SERIO_TYPE) != SERIO_XT)
		return;

	if (!(xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL)))
		return;

	memset(xtkbd, 0, sizeof(struct xtkbd));
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	xtkbd->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REP);

	xtkbd->serio = serio;

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	init_input_dev(&xtkbd->dev);
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	xtkbd->dev.keycode = xtkbd->keycode;
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	xtkbd->dev.keycodesize = sizeof(unsigned char);
	xtkbd->dev.keycodemax = ARRAY_SIZE(xtkbd_keycode);
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	xtkbd->dev.private = xtkbd;

	serio->private = xtkbd;

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	if (serio_open(serio, drv)) {
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		kfree(xtkbd);
		return;
	}

	memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));
	for (i = 0; i < 255; i++)
		set_bit(xtkbd->keycode[i], xtkbd->dev.keybit);
	clear_bit(0, xtkbd->dev.keybit);

	sprintf(xtkbd->phys, "%s/input0", serio->phys);

	xtkbd->dev.name = xtkbd_name;
	xtkbd->dev.phys = xtkbd->phys;
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	xtkbd->dev.id.bustype = BUS_XTKBD;
	xtkbd->dev.id.vendor = 0x0001;
	xtkbd->dev.id.product = 0x0001;
	xtkbd->dev.id.version = 0x0100;
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	input_register_device(&xtkbd->dev);

	printk(KERN_INFO "input: %s on %s\n", xtkbd_name, serio->phys);
}

void xtkbd_disconnect(struct serio *serio)
{
	struct xtkbd *xtkbd = serio->private;
	input_unregister_device(&xtkbd->dev);
	serio_close(serio);
	kfree(xtkbd);
}

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struct serio_driver xtkbd_drv = {
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	.driver		= {
		.name	= "xtkbd",
	},
	.description	= DRIVER_DESC,
	.interrupt	= xtkbd_interrupt,
	.connect	= xtkbd_connect,
	.disconnect	= xtkbd_disconnect,
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};

int __init xtkbd_init(void)
{
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	serio_register_driver(&xtkbd_drv);
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	return 0;
}

void __exit xtkbd_exit(void)
{
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	serio_unregister_driver(&xtkbd_drv);
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}

module_init(xtkbd_init);
module_exit(xtkbd_exit);