xf86-input-evdev/src/evdev_key.c

/*
 * Copyright © 2006 Zephaniah E. Hull
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Soft-
 * ware"), to deal in the Software without restriction, including without
 * limitation the rights to use, copy, modify, merge, publish, distribute,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, provided that the above copyright
 * notice(s) and this permission notice appear in all copies of the Soft-
 * ware and that both the above copyright notice(s) and this permission
 * notice appear in supporting documentation.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
 * ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY
 * RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN
 * THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSE-
 * QUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFOR-
 * MANCE OF THIS SOFTWARE.
 *
 * Except as contained in this notice, the name of a copyright holder shall
 * not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization of
 * the copyright holder.
 *
 * Author:  Zephaniah E. Hull (warp@aehallh.com)
 */
/*
 * Copyright © 2004 Red Hat, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of Red Hat
 * not be used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.  Red
 * Hat makes no representations about the suitability of this software
 * for any purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * RED HAT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL RED HAT BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Author:  Kristian Høgsberg (krh@redhat.com)
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "evdev.h"

#include <X11/keysym.h>
#include <X11/XF86keysym.h>
#include <X11/extensions/XIproto.h>

#include <linux/input.h>

#include <misc.h>
#include <xf86.h>
#include <xf86str.h>
#include <xf86_OSproc.h>
#include <xf86Xinput.h>
#include <exevents.h>
#include <mipointer.h>

#include <xf86Module.h>

#include <X11/extensions/XKB.h>
#include <X11/extensions/XKBstr.h>
#include <X11/extensions/XKBsrv.h>


#define ArrayLength(a) (sizeof(a) / (sizeof((a)[0])))

#define MIN_KEYCODE 8
#define GLYPHS_PER_KEY 2
#define AltMask		Mod1Mask
#define NumLockMask	Mod2Mask
#define AltLangMask	Mod3Mask
#define KanaMask	Mod4Mask
#define ScrollLockMask	Mod5Mask

#define CAPSFLAG	1
#define NUMFLAG		2
#define SCROLLFLAG	4
#define MODEFLAG	8
#define COMPOSEFLAG	16

/* FIXME: this map works with evdev keyboards, but all the xkb maps
 * probably don't.  The easiest is to remap the event keycodes.  */

static KeySym map[] = {
    /* 0x00 */  NoSymbol,       NoSymbol,
    /* 0x01 */  XK_Escape,      NoSymbol,
    /* 0x02 */  XK_1,           XK_exclam,
    /* 0x03 */  XK_2,           XK_at,
    /* 0x04 */  XK_3,           XK_numbersign,
    /* 0x05 */  XK_4,           XK_dollar,
    /* 0x06 */  XK_5,           XK_percent,
    /* 0x07 */  XK_6,           XK_asciicircum,
    /* 0x08 */  XK_7,           XK_ampersand,
    /* 0x09 */  XK_8,           XK_asterisk,
    /* 0x0a */  XK_9,           XK_parenleft,
    /* 0x0b */  XK_0,           XK_parenright,
    /* 0x0c */  XK_minus,       XK_underscore,
    /* 0x0d */  XK_equal,       XK_plus,
    /* 0x0e */  XK_BackSpace,   NoSymbol,
    /* 0x0f */  XK_Tab,         XK_ISO_Left_Tab,
    /* 0x10 */  XK_Q,           NoSymbol,
    /* 0x11 */  XK_W,           NoSymbol,
    /* 0x12 */  XK_E,           NoSymbol,
    /* 0x13 */  XK_R,           NoSymbol,
    /* 0x14 */  XK_T,           NoSymbol,
    /* 0x15 */  XK_Y,           NoSymbol,
    /* 0x16 */  XK_U,           NoSymbol,
    /* 0x17 */  XK_I,           NoSymbol,
    /* 0x18 */  XK_O,           NoSymbol,
    /* 0x19 */  XK_P,           NoSymbol,
    /* 0x1a */  XK_bracketleft, XK_braceleft,
    /* 0x1b */  XK_bracketright,XK_braceright,
    /* 0x1c */  XK_Return,      NoSymbol,
    /* 0x1d */  XK_Control_L,   NoSymbol,
    /* 0x1e */  XK_A,           NoSymbol,
    /* 0x1f */  XK_S,           NoSymbol,
    /* 0x20 */  XK_D,           NoSymbol,
    /* 0x21 */  XK_F,           NoSymbol,
    /* 0x22 */  XK_G,           NoSymbol,
    /* 0x23 */  XK_H,           NoSymbol,
    /* 0x24 */  XK_J,           NoSymbol,
    /* 0x25 */  XK_K,           NoSymbol,
    /* 0x26 */  XK_L,           NoSymbol,
    /* 0x27 */  XK_semicolon,   XK_colon,
    /* 0x28 */  XK_quoteright,  XK_quotedbl,
    /* 0x29 */  XK_quoteleft,	XK_asciitilde,
    /* 0x2a */  XK_Shift_L,     NoSymbol,
    /* 0x2b */  XK_backslash,   XK_bar,
    /* 0x2c */  XK_Z,           NoSymbol,
    /* 0x2d */  XK_X,           NoSymbol,
    /* 0x2e */  XK_C,           NoSymbol,
    /* 0x2f */  XK_V,           NoSymbol,
    /* 0x30 */  XK_B,           NoSymbol,
    /* 0x31 */  XK_N,           NoSymbol,
    /* 0x32 */  XK_M,           NoSymbol,
    /* 0x33 */  XK_comma,       XK_less,
    /* 0x34 */  XK_period,      XK_greater,
    /* 0x35 */  XK_slash,       XK_question,
    /* 0x36 */  XK_Shift_R,     NoSymbol,
    /* 0x37 */  XK_KP_Multiply, NoSymbol,
    /* 0x38 */  XK_Alt_L,	XK_Meta_L,
    /* 0x39 */  XK_space,       NoSymbol,
    /* 0x3a */  XK_Caps_Lock,   NoSymbol,
    /* 0x3b */  XK_F1,          NoSymbol,
    /* 0x3c */  XK_F2,          NoSymbol,
    /* 0x3d */  XK_F3,          NoSymbol,
    /* 0x3e */  XK_F4,          NoSymbol,
    /* 0x3f */  XK_F5,          NoSymbol,
    /* 0x40 */  XK_F6,          NoSymbol,
    /* 0x41 */  XK_F7,          NoSymbol,
    /* 0x42 */  XK_F8,          NoSymbol,
    /* 0x43 */  XK_F9,          NoSymbol,
    /* 0x44 */  XK_F10,         NoSymbol,
    /* 0x45 */  XK_Num_Lock,    NoSymbol,
    /* 0x46 */  XK_Scroll_Lock,	NoSymbol,
    /* These KP keys should have the KP_7 keysyms in the numlock
     * modifer... ? */
    /* 0x47 */  XK_KP_Home,	XK_KP_7,
    /* 0x48 */  XK_KP_Up,	XK_KP_8,
    /* 0x49 */  XK_KP_Prior,	XK_KP_9,
    /* 0x4a */  XK_KP_Subtract, NoSymbol,
    /* 0x4b */  XK_KP_Left,	XK_KP_4,
    /* 0x4c */  XK_KP_Begin,	XK_KP_5,
    /* 0x4d */  XK_KP_Right,	XK_KP_6,
    /* 0x4e */  XK_KP_Add,      NoSymbol,
    /* 0x4f */  XK_KP_End,	XK_KP_1,
    /* 0x50 */  XK_KP_Down,	XK_KP_2,
    /* 0x51 */  XK_KP_Next,	XK_KP_3,
    /* 0x52 */  XK_KP_Insert,	XK_KP_0,
    /* 0x53 */  XK_KP_Delete,	XK_KP_Decimal,
    /* 0x54 */  NoSymbol,	NoSymbol,
    /* 0x55 */  XK_F13,		NoSymbol,
    /* 0x56 */  XK_less,	XK_greater,
    /* 0x57 */  XK_F11,		NoSymbol,
    /* 0x58 */  XK_F12,		NoSymbol,
    /* 0x59 */  XK_F14,		NoSymbol,
    /* 0x5a */  XK_F15,		NoSymbol,
    /* 0x5b */  XK_F16,		NoSymbol,
    /* 0x5c */  XK_F17,		NoSymbol,
    /* 0x5d */  XK_F18,		NoSymbol,
    /* 0x5e */  XK_F19,		NoSymbol,
    /* 0x5f */  XK_F20,		NoSymbol,
    /* 0x60 */  XK_KP_Enter,	NoSymbol,
    /* 0x61 */  XK_Control_R,	NoSymbol,
    /* 0x62 */  XK_KP_Divide,	NoSymbol,
    /* 0x63 */  XK_Print,	XK_Sys_Req,
    /* 0x64 */  XK_Alt_R,	XK_Meta_R,
    /* 0x65 */  NoSymbol,	NoSymbol, /* KEY_LINEFEED */
    /* 0x66 */  XK_Home,	NoSymbol,
    /* 0x67 */  XK_Up,		NoSymbol,
    /* 0x68 */  XK_Prior,	NoSymbol,
    /* 0x69 */  XK_Left,	NoSymbol,
    /* 0x6a */  XK_Right,	NoSymbol,
    /* 0x6b */  XK_End,		NoSymbol,
    /* 0x6c */  XK_Down,	NoSymbol,
    /* 0x6d */  XK_Next,	NoSymbol,
    /* 0x6e */  XK_Insert,	NoSymbol,
    /* 0x6f */  XK_Delete,	NoSymbol,
    /* 0x6f */  NoSymbol,	NoSymbol, /* KEY_MACRO */
    /* 0x70 */  NoSymbol,	NoSymbol,
    /* 0x71 */  NoSymbol,	NoSymbol,
    /* 0x72 */  NoSymbol,	NoSymbol,
    /* 0x73 */  NoSymbol,	NoSymbol,
    /* 0x74 */  NoSymbol,	NoSymbol,
    /* 0x75 */  XK_KP_Equal,	NoSymbol,
    /* 0x76 */  NoSymbol,	NoSymbol,
    /* 0x77 */  NoSymbol,	NoSymbol,
    /* 0x78 */  XK_F21,		NoSymbol,
    /* 0x79 */  XK_F22,		NoSymbol,
    /* 0x7a */  XK_F23,		NoSymbol,
    /* 0x7b */  XK_F24,		NoSymbol,
    /* 0x7c */  XK_KP_Separator, NoSymbol,
    /* 0x7d */  XK_Meta_L,	NoSymbol,
    /* 0x7e */  XK_Meta_R,	NoSymbol,
    /* 0x7f */  XK_Multi_key,	NoSymbol,
    /* 0x80 */  NoSymbol,	NoSymbol,
    /* 0x81 */  NoSymbol,	NoSymbol,
    /* 0x82 */  NoSymbol,	NoSymbol,
    /* 0x83 */  NoSymbol,	NoSymbol,
    /* 0x84 */  NoSymbol,	NoSymbol,
    /* 0x85 */  NoSymbol,	NoSymbol,
    /* 0x86 */  NoSymbol,	NoSymbol,
    /* 0x87 */  NoSymbol,	NoSymbol,
    /* 0x88 */  NoSymbol,	NoSymbol,
    /* 0x89 */  NoSymbol,	NoSymbol,
    /* 0x8a */  NoSymbol,	NoSymbol,
    /* 0x8b */  NoSymbol,	NoSymbol,
    /* 0x8c */  NoSymbol,	NoSymbol,
    /* 0x8d */  NoSymbol,	NoSymbol,
    /* 0x8e */  NoSymbol,	NoSymbol,
    /* 0x8f */  NoSymbol,	NoSymbol,
    /* 0x90 */  NoSymbol,	NoSymbol,
    /* 0x91 */  NoSymbol,	NoSymbol,
    /* 0x92 */  NoSymbol,	NoSymbol,
    /* 0x93 */  NoSymbol,	NoSymbol,
    /* 0x94 */  NoSymbol,	NoSymbol,
    /* 0x95 */  NoSymbol,	NoSymbol,
    /* 0x96 */  NoSymbol,	NoSymbol,
    /* 0x97 */  NoSymbol,	NoSymbol,
    /* 0x98 */  NoSymbol,	NoSymbol,
    /* 0x99 */  NoSymbol,	NoSymbol,
    /* 0x9a */  NoSymbol,	NoSymbol,
    /* 0x9b */  NoSymbol,	NoSymbol,
    /* 0x9c */  NoSymbol,	NoSymbol,
    /* 0x9d */  NoSymbol,	NoSymbol,
    /* 0x9e */  NoSymbol,	NoSymbol,
    /* 0x9f */  NoSymbol,	NoSymbol,
    /* 0xa0 */  NoSymbol,	NoSymbol,
    /* 0xa1 */  NoSymbol,	NoSymbol,
    /* 0xa2 */  NoSymbol,	NoSymbol,
    /* 0xa3 */  NoSymbol,	NoSymbol,
    /* 0xa4 */  NoSymbol,	NoSymbol,
    /* 0xa5 */  NoSymbol,	NoSymbol,
    /* 0xa6 */  NoSymbol,	NoSymbol,
    /* 0xa7 */  NoSymbol,	NoSymbol,
    /* 0xa8 */  NoSymbol,	NoSymbol,
    /* 0xa9 */  NoSymbol,	NoSymbol,
    /* 0xaa */  NoSymbol,	NoSymbol,
    /* 0xab */  NoSymbol,	NoSymbol,
    /* 0xac */  NoSymbol,	NoSymbol,
    /* 0xad */  NoSymbol,	NoSymbol,
    /* 0xae */  NoSymbol,	NoSymbol,
    /* 0xaf */  NoSymbol,	NoSymbol,
    /* 0xb0 */  NoSymbol,	NoSymbol,
    /* 0xb1 */  NoSymbol,	NoSymbol,
    /* 0xb2 */  NoSymbol,	NoSymbol,
    /* 0xb3 */  NoSymbol,	NoSymbol,
    /* 0xb4 */  NoSymbol,	NoSymbol,
    /* 0xb5 */  NoSymbol,	NoSymbol,
    /* 0xb6 */  NoSymbol,	NoSymbol,
    /* 0xb7 */  NoSymbol,	NoSymbol,
    /* 0xb8 */  NoSymbol,	NoSymbol,
    /* 0xb9 */  NoSymbol,	NoSymbol,
    /* 0xba */  NoSymbol,	NoSymbol,
    /* 0xbb */  NoSymbol,	NoSymbol,
    /* 0xbc */  NoSymbol,	NoSymbol,
    /* 0xbd */  NoSymbol,	NoSymbol,
    /* 0xbe */  NoSymbol,	NoSymbol,
    /* 0xbf */  NoSymbol,	NoSymbol,
    /* 0xc0 */  NoSymbol,	NoSymbol,
    /* 0xc1 */  NoSymbol,	NoSymbol,
    /* 0xc2 */  NoSymbol,	NoSymbol,
    /* 0xc3 */  NoSymbol,	NoSymbol,
    /* 0xc4 */  NoSymbol,	NoSymbol,
    /* 0xc5 */  NoSymbol,	NoSymbol,
    /* 0xc6 */  NoSymbol,	NoSymbol,
    /* 0xc7 */  NoSymbol,	NoSymbol,
    /* 0xc8 */  NoSymbol,	NoSymbol,
    /* 0xc9 */  NoSymbol,	NoSymbol,
    /* 0xca */  NoSymbol,	NoSymbol,
    /* 0xcb */  NoSymbol,	NoSymbol,
    /* 0xcc */  NoSymbol,	NoSymbol,
    /* 0xcd */  NoSymbol,	NoSymbol,
    /* 0xce */  NoSymbol,	NoSymbol,
    /* 0xcf */  NoSymbol,	NoSymbol,
    /* 0xd0 */  NoSymbol,	NoSymbol,
    /* 0xd1 */  NoSymbol,	NoSymbol,
    /* 0xd2 */  NoSymbol,	NoSymbol,
    /* 0xd3 */  NoSymbol,	NoSymbol,
    /* 0xd4 */  NoSymbol,	NoSymbol,
    /* 0xd5 */  NoSymbol,	NoSymbol,
    /* 0xd6 */  NoSymbol,	NoSymbol,
    /* 0xd7 */  NoSymbol,	NoSymbol,
    /* 0xd8 */  NoSymbol,	NoSymbol,
    /* 0xd9 */  NoSymbol,	NoSymbol,
    /* 0xda */  NoSymbol,	NoSymbol,
    /* 0xdb */  NoSymbol,	NoSymbol,
    /* 0xdc */  NoSymbol,	NoSymbol,
    /* 0xdd */  NoSymbol,	NoSymbol,
    /* 0xde */  NoSymbol,	NoSymbol,
    /* 0xdf */  NoSymbol,	NoSymbol,
    /* 0xe0 */  NoSymbol,	NoSymbol,
    /* 0xe1 */  NoSymbol,	NoSymbol,
    /* 0xe2 */  NoSymbol,	NoSymbol,
    /* 0xe3 */  NoSymbol,	NoSymbol,
    /* 0xe4 */  NoSymbol,	NoSymbol,
    /* 0xe5 */  NoSymbol,	NoSymbol,
    /* 0xe6 */  NoSymbol,	NoSymbol,
    /* 0xe7 */  NoSymbol,	NoSymbol,
    /* 0xe8 */  NoSymbol,	NoSymbol,
    /* 0xe9 */  NoSymbol,	NoSymbol,
    /* 0xea */  NoSymbol,	NoSymbol,
    /* 0xeb */  NoSymbol,	NoSymbol,
    /* 0xec */  NoSymbol,	NoSymbol,
    /* 0xed */  NoSymbol,	NoSymbol,
    /* 0xee */  NoSymbol,	NoSymbol,
    /* 0xef */  NoSymbol,	NoSymbol,
    /* 0xf0 */  NoSymbol,	NoSymbol,
    /* 0xf1 */  NoSymbol,	NoSymbol,
    /* 0xf2 */  NoSymbol,	NoSymbol,
    /* 0xf3 */  NoSymbol,	NoSymbol,
    /* 0xf4 */  NoSymbol,	NoSymbol,
    /* 0xf5 */  NoSymbol,	NoSymbol,
    /* 0xf6 */  NoSymbol,	NoSymbol,
    /* 0xf7 */  NoSymbol,	NoSymbol,
    /* 0xf8 */  NoSymbol,	NoSymbol,
};

/*
 * FIXME: We have no way of ringing the bell ourselves.
 *
 * And recent versions of X don't have the system call.
 * Who cares.
 */
static void
EvdevKbdBell (int percent, DeviceIntPtr device, pointer arg, int unused)
{
#if 0
    KeybdCtrl *ctrl = arg;

    xf86OSRingBell(percent, ctrl->bell_pitch, ctrl->bell_duration);
#endif
}

static void
EvdevKbdCtrl(DeviceIntPtr device, KeybdCtrl *ctrl)
{
    static struct { int xbit, code; } bits[] = {
        { CAPSFLAG,	LED_CAPSL },
        { NUMFLAG,	LED_NUML },
        { SCROLLFLAG,	LED_SCROLLL },
        { MODEFLAG,	LED_KANA },
        { COMPOSEFLAG,	LED_COMPOSE }
    };

    InputInfoPtr pInfo;
    struct input_event ev[ArrayLength(bits)];
    int i;

    pInfo = device->public.devicePrivate;
    for (i = 0; i < ArrayLength(bits); i++) {
        ev[i].type = EV_LED;
        ev[i].code = bits[i].code;
        ev[i].value = (ctrl->leds & bits[i].xbit) > 0;
    }
    write(pInfo->fd, ev, sizeof(ev));

    if (device->key && device->key->xkbInfo && device->key->xkbInfo->desc
	    && device->key->xkbInfo->desc->ctrls) {
	XkbControlsRec *ctrls = device->key->xkbInfo->desc->ctrls;

	ev[0].type = EV_REP;
	ev[0].code = REP_DELAY;
	ev[0].value = ctrls->repeat_delay;

	ev[1].type = EV_REP;
	ev[1].code = REP_PERIOD;
	ev[1].value = ctrls->repeat_interval;

	write(pInfo->fd, ev, sizeof(ev[0]) * 2);
    }
}

int
EvdevKeyInit (DeviceIntPtr device)
{
    InputInfoPtr pInfo = device->public.devicePrivate;
    evdevDevicePtr pEvdev = pInfo->private;
    evdevStatePtr state = &pEvdev->state;
    KeySymsRec keySyms;
    CARD8 modMap[MAP_LENGTH];
    KeySym sym;
    int i, j;

    static struct { KeySym keysym; CARD8 mask; } modifiers[] = {
        { XK_Shift_L,		ShiftMask },
        { XK_Shift_R, 		ShiftMask },
        { XK_Control_L,		ControlMask },
        { XK_Control_R,		ControlMask },
        { XK_Caps_Lock,		LockMask },
        { XK_Alt_L,		AltMask },
        { XK_Alt_R,		AltMask },
        { XK_Num_Lock,		NumLockMask },
        { XK_Scroll_Lock,	ScrollLockMask },
        { XK_Mode_switch,	AltLangMask }
    };

    /* TODO:
     * Ctrl-Alt-Backspace and other Ctrl-Alt-stuff should work
     * XKB, let's try without the #ifdef nightmare
     * Get keyboard repeat under control (right now caps lock repeats!)
     */

    pInfo = device->public.devicePrivate;

     /* Compute the modifier map */
    memset(modMap, 0, sizeof modMap);

    for (i = 0; i < ArrayLength(map) / GLYPHS_PER_KEY; i++) {
        sym = map[i * GLYPHS_PER_KEY];
        for (j = 0; j < ArrayLength(modifiers); j++) {
            if (modifiers[j].keysym == sym)
                modMap[i + MIN_KEYCODE] = modifiers[j].mask;
        }
    }

    keySyms.map        = map;
    keySyms.mapWidth   = GLYPHS_PER_KEY;
    keySyms.minKeyCode = MIN_KEYCODE;
    keySyms.maxKeyCode = MIN_KEYCODE + ArrayLength(map) / GLYPHS_PER_KEY - 1;


    XkbSetRulesDflts (state->key->xkb_rules, state->key->xkb_model,
	    state->key->xkb_layout, state->key->xkb_variant,
	    state->key->xkb_options);

    XkbInitKeyboardDeviceStruct (device, &state->key->xkbnames, &keySyms, modMap,
	    EvdevKbdBell, EvdevKbdCtrl);

    return Success;
}

static void
SetXkbOption(InputInfoPtr pInfo, char *name, char *value, char **option)
{
   char *s;

   if ((s = xf86SetStrOption(pInfo->options, name, value))) {
       if (!s[0]) {
           xfree(s);
           *option = NULL;
       } else {
           *option = s;
       }
    }
}

int
EvdevKeyNew (InputInfoPtr pInfo)
{
    evdevDevicePtr pEvdev = pInfo->private;
    evdevStatePtr state = &pEvdev->state;
    int i, keys = 0;

    for (i = 0; i <= KEY_UNKNOWN; i++)
	if (test_bit (i, pEvdev->bits.key)) {
	    keys = 1;
	    break;
	}
    if (!keys)
	for (i = KEY_OK; i <= KEY_MAX; i++)
	    if (test_bit (i, pEvdev->bits.key)) {
		keys = 1;
		break;
	    }

    if (!keys)
	return !Success;

    state->key = Xcalloc (sizeof (evdevKeyRec));

    pInfo->type_name = XI_KEYBOARD;

    pInfo->flags |= XI86_KEYBOARD_CAPABLE | XI86_CONFIGURED;

    SetXkbOption (pInfo, "XkbRules", __XKBDEFRULES__, &state->key->xkb_rules);
    SetXkbOption (pInfo, "XkbModel", "evdev", &state->key->xkb_model);
    SetXkbOption (pInfo, "XkbLayout", "us", &state->key->xkb_layout);
    SetXkbOption (pInfo, "XkbVariant", NULL, &state->key->xkb_variant);
    SetXkbOption (pInfo, "XkbOptions", NULL, &state->key->xkb_options);

    /*
    SetXkbOption (pInfo, "XkbKeycodes", NULL, &state->key->xkbnames.keycodes);
    SetXkbOption (pInfo, "XkbTypes", NULL, &state->key->xkbnames.types);
    SetXkbOption (pInfo, "XkbCompat", NULL, &state->key->xkbnames.compat);
    SetXkbOption (pInfo, "XkbSymbols", NULL, &state->key->xkbnames.symbols);
    SetXkbOption (pInfo, "XkbGeometry", NULL, &state->key->xkbnames.geometry);
    */

    return Success;
}

int
EvdevKeyOn (DeviceIntPtr device)
{
    return Success;
}

int
EvdevKeyOff (DeviceIntPtr device)
{
    unsigned int    i;
    KeyClassRec     *keyc = device->key;
    KeySym          *map = keyc->curKeySyms.map;

    /*
     * A bit of a hack, vaguely stolen from xf86-input-keyboard.
     *
     * Don't leave any keys in the down state if we are getting turned
     * off, as they are likely to be released before we are turned back
     * on.
     * (For example, if the user switches VTs, or if we are unplugged.)
     */
    for (i = keyc->curKeySyms.minKeyCode, map = keyc->curKeySyms.map;
	    i < keyc->curKeySyms.maxKeyCode;
	    i++, map += keyc->curKeySyms.mapWidth)
	if ((keyc->down[i >> 3] & (1 << (i & 7))))
	{
	    switch (*map) {
		/* Don't release the lock keys */
		case XK_Caps_Lock:
		case XK_Shift_Lock:
		case XK_Num_Lock:
		case XK_Scroll_Lock:
		case XK_Kana_Lock:
		    break;
		default:
		    xf86PostKeyboardEvent(device, i, 0);
	    }
	}
    return Success;
}

void
EvdevKeyProcess (InputInfoPtr pInfo, struct input_event *ev)
{
    int keycode = ev->code + MIN_KEYCODE;

    /* filter repeat events for chording keys */
    if (ev->value == 2) {
	DeviceIntPtr device = pInfo->dev;
	KeyClassRec  *keyc = device->key;
	KbdFeedbackClassRec *kbdfeed = device->kbdfeed;
	int num = keycode >> 3;
	int bit = 1 << (keycode & 7);

	if (keyc->modifierMap[keycode] ||
		!(kbdfeed->ctrl.autoRepeats[num] & bit))
	    return;
    }

    xf86PostKeyboardEvent(pInfo->dev, keycode, ev->value);
}