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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

 * 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 <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>

#define DRIVER_DESC     "XT keyboard driver"

MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE("GPL");

#define XTKBD_EMUL0     0xe0

#define XTKBD_EMUL1     0xe1

#define XTKBD_KEY       0x7f

#define XTKBD_RELEASE   0x80

static unsigned char xtkbd_keycode[256] = {

          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

};

struct xtkbd {

        unsigned char keycode[256];

        struct input_dev *dev;

        struct serio *serio;

        char phys[32];

};

static irqreturn_t xtkbd_interrupt(struct serio *serio,

        unsigned char data, unsigned int flags)

{

        struct xtkbd *xtkbd = serio_get_drvdata(serio);

        switch (data) {

                case XTKBD_EMUL0:

                case XTKBD_EMUL1:

                        break;

                default:

                        if (xtkbd->keycode[data & XTKBD_KEY]) {

                                input_report_key(xtkbd->dev, xtkbd->keycode[data & XTKBD_KEY], !(data & XTKBD_RELEASE));

                                input_sync(xtkbd->dev);

                        } else {

                                printk(KERN_WARNING "xtkbd.c: Unknown key (scancode %#x) %s.\n",

                                        data & XTKBD_KEY, data & XTKBD_RELEASE ? "released" : "pressed");

                        }

        }

        return IRQ_HANDLED;

}

static int xtkbd_connect(struct serio *serio, struct serio_driver *drv)

{

        struct xtkbd *xtkbd;

        struct input_dev *input_dev;

        int err = -ENOMEM;

        int i;

        xtkbd = kmalloc(sizeof(struct xtkbd), GFP_KERNEL);

        input_dev = input_allocate_device();

        if (!xtkbd || !input_dev)

                goto fail1;

        xtkbd->serio = serio;

        xtkbd->dev = input_dev;

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

        memcpy(xtkbd->keycode, xtkbd_keycode, sizeof(xtkbd->keycode));

        input_dev->name = "XT Keyboard";

        input_dev->phys = xtkbd->phys;

        input_dev->id.bustype = BUS_XTKBD;

        input_dev->id.vendor  = 0x0001;

        input_dev->id.product = 0x0001;

        input_dev->id.version = 0x0100;

        input_dev->dev.parent = &serio->dev;

        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);

        input_dev->keycode = xtkbd->keycode;

        input_dev->keycodesize = sizeof(unsigned char);

        input_dev->keycodemax = ARRAY_SIZE(xtkbd_keycode);

        for (i = 0; i < 255; i++)

                set_bit(xtkbd->keycode[i], input_dev->keybit);

        clear_bit(0, input_dev->keybit);

        serio_set_drvdata(serio, xtkbd);

        err = serio_open(serio, drv);

        if (err)

                goto fail2;

        err = input_register_device(xtkbd->dev);

        if (err)

                goto fail3;

        return 0;

 fail3: serio_close(serio);

 fail2: serio_set_drvdata(serio, NULL);

 fail1: input_free_device(input_dev);

        kfree(xtkbd);

        return err;

}

static void xtkbd_disconnect(struct serio *serio)

{

        struct xtkbd *xtkbd = serio_get_drvdata(serio);

        serio_close(serio);

        serio_set_drvdata(serio, NULL);

        input_unregister_device(xtkbd->dev);

        kfree(xtkbd);

}

static struct serio_device_id xtkbd_serio_ids[] = {

        {

                .type   = SERIO_XT,

                .proto  = SERIO_ANY,

                .id     = SERIO_ANY,

                .extra  = SERIO_ANY,

        },

        { 0 }

};

MODULE_DEVICE_TABLE(serio, xtkbd_serio_ids);

static struct serio_driver xtkbd_drv = {

        .driver         = {

                .name   = "xtkbd",

        },

        .description    = DRIVER_DESC,

        .id_table       = xtkbd_serio_ids,

        .interrupt      = xtkbd_interrupt,

        .connect        = xtkbd_connect,

        .disconnect     = xtkbd_disconnect,

};

static int __init xtkbd_init(void)

{

        return serio_register_driver(&xtkbd_drv);

}

static void __exit xtkbd_exit(void)

{

        serio_unregister_driver(&xtkbd_drv);

}

module_init(xtkbd_init);

module_exit(xtkbd_exit);