path: root/drivers/hid/hid-input.c

/*
 *  Copyright (c) 2000-2001 Vojtech Pavlik
 *  Copyright (c) 2006-2007 Jiri Kosina
 *
 *  HID to Linux Input mapping
 */

/*
 * 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/module.h>
#include <linux/slab.h>
#include <linux/kernel.h>

#include <linux/hid.h>
#include <linux/hid-debug.h>

#define unk	KEY_UNKNOWN

static const unsigned char hid_keyboard[256] = {
	  0,  0,  0,  0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
	 50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44,  2,  3,
	  4,  5,  6,  7,  8,  9, 10, 11, 28,  1, 14, 15, 57, 12, 13, 26,
	 27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
	 65, 66, 67, 68, 87, 88, 99, 70,119,110,102,104,111,107,109,106,
	105,108,103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
	 72, 73, 82, 83, 86,127,116,117,183,184,185,186,187,188,189,190,
	191,192,193,194,134,138,130,132,128,129,131,137,133,135,136,113,
	115,114,unk,unk,unk,121,unk, 89, 93,124, 92, 94, 95,unk,unk,unk,
	122,123, 90, 91, 85,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,179,180,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,unk,
	 29, 42, 56,125, 97, 54,100,126,164,166,165,163,161,115,114,113,
	150,158,159,128,136,177,178,176,142,152,173,140,unk,unk,unk,unk
};

static const struct {
	__s32 x;
	__s32 y;
}  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, {-1, 1}, {-1, 0}, {-1,-1}};

#define map_abs(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_ABS, (c))
#define map_rel(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_REL, (c))
#define map_key(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_KEY, (c))
#define map_led(c)	hid_map_usage(hidinput, usage, &bit, &max, EV_LED, (c))

#define map_abs_clear(c)	hid_map_usage_clear(hidinput, usage, &bit, \
		&max, EV_ABS, (c))
#define map_key_clear(c)	hid_map_usage_clear(hidinput, usage, &bit, \
		&max, EV_KEY, (c))

static inline int match_scancode(int code, int scancode)
{
	if (scancode == 0)
		return 1;
	return ((code & (HID_USAGE_PAGE | HID_USAGE)) == scancode);
}

static inline int match_keycode(int code, int keycode)
{
	if (keycode == 0)
		return 1;
	return (code == keycode);
}

static struct hid_usage *hidinput_find_key(struct hid_device *hid,
		int scancode, int keycode)
{
	int i, j, k;
	struct hid_report *report;
	struct hid_usage *usage;

	for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++) {
		list_for_each_entry(report, &hid->report_enum[k].report_list, list) {
			for (i = 0; i < report->maxfield; i++) {
				for ( j = 0; j < report->field[i]->maxusage; j++) {
					usage = report->field[i]->usage + j;
					if (usage->type == EV_KEY &&
						match_scancode(usage->hid, scancode) &&
						match_keycode(usage->code, keycode))
						return usage;
				}
			}
		}
	}
	return NULL;
}

static int