/*
 * $Id: keybdev.c,v 1.2 2005/06/16 13:46:41 cgoh Exp $
 *
 *  Copyright (c) 1999-2000 Vojtech Pavlik
 *
 *  Input driver to keyboard driver binding.
 *
 *  Sponsored by SuSE
 */

/*
 * 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@suse.cz>, or by paper mail:
 * Vojtech Pavlik, Ucitelska 1576, Prague 8, 182 00 Czech Republic
 */

#include <linux/config.h>
#include <linux/kbd_ll.h>
#include <linux/input.h>
#include <linux/malloc.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kbd_kern.h>
#include <linux/kcomp.h>

#if defined(__i386__) || defined(__alpha__) || defined(__mips__) || defined(__powerpc__) || defined(__ETI__)

static int x86_sysrq_alt = 0;

static unsigned short x86_keycodes[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, 43, 85, 86, 87, 88,115,119,120,121,375,123, 90,
	284,285,309,298,312, 91,327,328,329,331,333,335,336,337,338,339,
	367,294,293,286,350, 92,334,512,116,377,109,111,259,347,348,349,
	360, 93, 94, 95, 98,376,100,101,357,316,354,304,289,102,351,355,
	103,104,105,275,281,272,306,106,274,107,288,364,358,363,362,361,
	291,108,381,290,287,292,279,305,280, 99,112,257,258,113,270,114,
	118,117,125,374,379,125,260,261,262,263,264,265,266,267,268,269,
	271,273,276,277,278,282,283,295,296,297,299,300,301,302,303,307,
	308,310,313,314,315,317,318,319,320,321,322,323,324,325,326,330,
	332,340,341,342,343,344,345,346,356,359,365,368,369,370,371,372
};

#ifdef CONFIG_INPUT_ADBHID
#ifdef CONFIG_MAC_ADBKEYCODES
extern int mac_hid_keyboard_sends_linux_keycodes(void);

static unsigned char mac_keycodes[256] = {
	  0, 53, 18, 19, 20, 21, 23, 22, 26, 28, 25, 29, 27, 24, 51, 48,
	 12, 13, 14, 15, 17, 16, 32, 34, 31, 35, 33, 30, 36, 54,128,  1,
	  2,  3,  5,  4, 38, 40, 37, 41, 39, 50, 56, 42,  6,  7,  8,  9,
	 11, 45, 46, 43, 47, 44,123, 67, 58, 49, 57,122,120, 99,118, 96,
	 97, 98,100,101,109, 71,107, 89, 91, 92, 78, 86, 87, 88, 69, 83,
	 84, 85, 82, 65, 42,  0, 10,103,111,  0,  0,  0,  0,  0,  0,  0,
	 76,125, 75,105,124,110,115, 62,116, 59, 60,119, 61,121,114,117,
	  0,  0,  0,  0,127, 81,  0,113,  0,  0,  0,  0, 95, 55, 55,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
	  0,  0,  0,  0,  0, 94,  0, 93,  0,  0,  0,  0,  0,  0,104,102
};
#endif /* CONFIG_MAC_ADBKEYCODES */
#ifdef CONFIG_MAC_EMUMOUSEBTN
extern int mac_hid_mouse_emulate_buttons(int, unsigned int, int);
#endif /* CONFIG_MAC_EMUMOUSEBTN */
#endif /* CONFIG_INPUT_ADBHID */

static int emulate_raw(unsigned int keycode, int down)
{
#ifdef CONFIG_INPUT_ADBHID
#ifdef CONFIG_MAC_EMUMOUSEBTN
	if (mac_hid_mouse_emulate_buttons(1, keycode, down))
		return 0;
#endif /* CONFIG_MAC_EMUMOUSEBTN */
#ifdef CONFIG_MAC_ADBKEYCODES
	if (!mac_hid_keyboard_sends_linux_keycodes()) {
		if (keycode > 255 || !mac_keycodes[keycode])
			return -1;

		handle_scancode(mac_keycodes[keycode] & 0x7f, down);

		return 0;
	}
#endif /* CONFIG_MAC_ADBKEYCODES */
#endif /* CONFIG_INPUT_ADBHID */
	if (keycode > 255 || !x86_keycodes[keycode])
		return -1; 

	if (keycode == KEY_PAUSE) {
		handle_scancode(0xe1, 1);
		handle_scancode(0x1d, down);
		handle_scancode(0x45, down);
		return 0;
	} 

	if (keycode == KEY_SYSRQ && x86_sysrq_alt) {
		handle_scancode(0x54, down);
		return 0;
	}

	if (x86_keycodes[keycode] & 0x100)
		handle_scancode(0xe0, 1);

	handle_scancode(x86_keycodes[keycode] & 0x7f, down);

	if (keycode == KEY_SYSRQ) {
		handle_scancode(0xe0, 1);
		handle_scancode(0x37, down);
	}

	if (keycode == KEY_LEFTALT || keycode == KEY_RIGHTALT)
		x86_sysrq_alt = down;

	return 0;
}

#endif

static struct input_handler keybdev_handler;

void keybdev_ledfunc(unsigned int led)
{
	struct input_handle *handle;	

	for (handle = keybdev_handler.handle; handle; handle = handle->hnext) {

		input_event(handle->dev, EV_LED, LED_SCROLLL, !!(led & 0x01));
		input_event(handle->dev, EV_LED, LED_NUML,    !!(led & 0x02));
		input_event(handle->dev, EV_LED, LED_CAPSL,   !!(led & 0x04));

	}
}

void keybdev_event(struct input_handle *handle, unsigned int type, unsigned int code, int down)
{
	if (type != EV_KEY) return;

	if (emulate_raw(code, down))
		printk(KERN_WARNING "keyboard.c: can't emulate rawmode for keycode %d\n", code);

	mark_bh(KEYBOARD_BH);
}

static struct input_handle *keybdev_connect(struct input_handler *handler, struct input_dev *dev)
{
	struct input_handle *handle;
	int i;

	if (!test_bit(EV_KEY, dev->evbit))
		return NULL;

	for (i = KEY_RESERVED; i < BTN_MISC; i++)
		if (test_bit(i, dev->keybit)) break;

	if (i == BTN_MISC)
 		return NULL;

	if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL)))
		return NULL;
	memset(handle, 0, sizeof(struct input_handle));

	handle->dev = dev;
	handle->handler = handler;

	input_open_device(handle);

	printk(KERN_INFO "keybdev.c: Adding keyboard: input%d\n", dev->number);

	return handle;
}

static void keybdev_disconnect(struct input_handle *handle)
{
	printk(KERN_INFO "keybdev.c: Removing keyboard: input%d\n", handle->dev->number);
	input_close_device(handle);
	kfree(handle);
}
	
static struct input_handler keybdev_handler = {
	event:		keybdev_event,
	connect:	keybdev_connect,
	disconnect:	keybdev_disconnect,
};

static int __init keybdev_init(void)
{
	input_register_handler(&keybdev_handler);
	kbd_ledfunc = keybdev_ledfunc;
	return 0;
}

static void __exit keybdev_exit(void)
{
	kbd_ledfunc = NULL;
	input_unregister_handler(&keybdev_handler);
}

module_init(keybdev_init);
module_exit(keybdev_exit);

MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
MODULE_DESCRIPTION("Input driver to keyboard driver binding");
