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path: root/xorg-server/hw/dmx/input/lnx-keyboard.c
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/* Portions of this file were derived from the following files:
 *
 **********************************************************************
 *
 * xfree86/common/{xf86Io.c,xf86Kbd.c,xf86Events.c}
 *
 * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
 *
 * 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 Thomas Roell not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Thomas Roell makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 *
 * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THOMAS ROELL 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.
 *
 **********************************************************************
 *
 * xfree86/common/xf86KbdLnx.c
 *
 * Linux version of keymapping setup. The kernel (since 0.99.14) has support
 * for fully remapping the keyboard, but there are some differences between
 * the Linux map and the SVR4 map (esp. in the extended keycodes). We also
 * remove the restriction on what keycodes can be remapped.
 * Orest Zborowski.
 *
 * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
 *
 * 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 Thomas Roell not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Thomas Roell makes no representations
 * about the suitability of this software for any purpose.  It is provided
 * "as is" without express or implied warranty.
 *
 * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL THOMAS ROELL 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.
 *
 **********************************************************************
 *
 * xfree86/os-support/linux/lnx_io.c
 *
 * Copyright 1992 by Orest Zborowski <obz@Kodak.com>
 * Copyright 1993 by David Dawes <dawes@xfree86.org>
 *
 * 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 names of Orest Zborowski and David Dawes 
 * not be used in advertising or publicity pertaining to distribution of 
 * the software without specific, written prior permission.  Orest Zborowski
 * and David Dawes make no representations about the suitability of this 
 * software for any purpose.  It is provided "as is" without express or 
 * implied warranty.
 *
 * OREST ZBOROWSKI AND DAVID DAWES DISCLAIMS ALL WARRANTIES WITH REGARD 
 * TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND 
 * FITNESS, IN NO EVENT SHALL OREST ZBOROWSKI OR DAVID DAWES 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.
 *
 */

/*
 * Copyright 2001-2003 Red Hat Inc., Durham, North Carolina.
 *
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation on the rights to use, copy, modify, merge,
 * publish, distribute, sublicense, and/or sell copies of the Software,
 * and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/*
 * Authors:
 *   Rickard E. (Rik) Faith <faith@redhat.com>
 *
 */

/** \file
 *
 * This code implements a low-level device driver for the Linux
 * keyboard.  The code is derived from code by Thomas Roell, Orest
 * Zborowski, and David Dawes (see the source code for complete
 * references). */

#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif

/*****************************************************************************/
/* Define some macros to make it easier to move this file to another
 * part of the Xserver tree.  All calls to the dmx* layer are #defined
 * here for the .c file.  The .h file will also have to be edited. */
#include "dmxinputinit.h"
#include "lnx-keyboard.h"

#define GETPRIV       myPrivate *priv                            \
                      = ((DMXLocalInputInfoPtr)(pDev->devicePrivate))->private

#define LOG0(f)       dmxLog(dmxDebug,f)
#define LOG1(f,a)     dmxLog(dmxDebug,f,a)
#define LOG2(f,a,b)   dmxLog(dmxDebug,f,a,b)
#define LOG3(f,a,b,c) dmxLog(dmxDebug,f,a,b,c)
#define FATAL0(f)     dmxLog(dmxFatal,f)
#define FATAL1(f,a)   dmxLog(dmxFatal,f,a)
#define FATAL2(f,a,b) dmxLog(dmxFatal,f,a,b)
#define MOTIONPROC    dmxMotionProcPtr
#define ENQUEUEPROC   dmxEnqueueProcPtr
#define CHECKPROC     dmxCheckSpecialProcPtr
#define SWITCHRETPROC dmxVTSwitchReturnProcPtr
#define BLOCK         DMXBlockType
#define MESSAGE       "\033c\n\n\nDMX taking input from this console..."
#define FINALMESSAGE  "\033cDMX terminated."

/* End of interface definitions. */
/*****************************************************************************/

#include "inputstr.h"
#include <X11/Xos.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <signal.h>
#include <sys/vt.h>
#include <sys/kd.h>
#include <termios.h>
#include "atKeynames.h"
#if 00
#include "xf86Keymap.h"
#endif
#include <linux/keyboard.h>

#define NUM_AT2LNX (sizeof(at2lnx) / sizeof(at2lnx[0]))
#define NUM_STATE_ENTRIES (256/32)


/* Private area for Linux-style keyboards. */
typedef struct _myPrivate {
    int            fd;
    int            vtno;
    int            vtcurrent;
    int            kbdtrans;
    struct termios kbdtty;
    int            kbdType;
    CARD32         kbdState[NUM_STATE_ENTRIES];
    DeviceIntPtr   pKeyboard;
    unsigned char  prefix;

    int            switched;
    SWITCHRETPROC  switch_return;
    void           *switch_return_data;

                                /* For bell */
    int            pitch;
    unsigned long  duration;
} myPrivate;

static myPrivate *PRIV = NULL;

#undef SYSCALL
#define SYSCALL(call) while(((call) == -1) && (errno == EINTR))

static int kbdLinuxKeyDown(myPrivate *priv, int keyCode)
{
    CARD8  byte = keyCode >> 5;
    CARD32 bit  = 1 << (keyCode & 0x1f);

    if (byte > NUM_STATE_ENTRIES) return 0;
    return priv->kbdState[byte] & bit;
}

static void kbdLinuxKeyState(myPrivate *priv, int type, int keyCode)
{
    CARD8  byte = keyCode >> 5;
    CARD32 bit  = 1 << (keyCode & 0x1f);

    if (byte > NUM_STATE_ENTRIES) return;
    if (type == KeyPress) priv->kbdState[byte] |= bit;
    else                  priv->kbdState[byte] &= ~bit;
}

static KeySym linux_to_x[256] = {
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	XK_BackSpace,	XK_Tab,		XK_Linefeed,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	XK_Escape,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	XK_space,	XK_exclam,	XK_quotedbl,	XK_numbersign,
	XK_dollar,	XK_percent,	XK_ampersand,	XK_apostrophe,
	XK_parenleft,	XK_parenright,	XK_asterisk,	XK_plus,
	XK_comma,	XK_minus,	XK_period,	XK_slash,
	XK_0,		XK_1,		XK_2,		XK_3,
	XK_4,		XK_5,		XK_6,		XK_7,
	XK_8,		XK_9,		XK_colon,	XK_semicolon,
	XK_less,	XK_equal,	XK_greater,	XK_question,
	XK_at,		XK_A,		XK_B,		XK_C,
	XK_D,		XK_E,		XK_F,		XK_G,
	XK_H,		XK_I,		XK_J,		XK_K,
	XK_L,		XK_M,		XK_N,		XK_O,
	XK_P,		XK_Q,		XK_R,		XK_S,
	XK_T,		XK_U,		XK_V,		XK_W,
	XK_X,		XK_Y,		XK_Z,		XK_bracketleft,
	XK_backslash,	XK_bracketright,XK_asciicircum,	XK_underscore,
	XK_grave,	XK_a,		XK_b,		XK_c,
	XK_d,		XK_e,		XK_f,		XK_g,
	XK_h,		XK_i,		XK_j,		XK_k,
	XK_l,		XK_m,		XK_n,		XK_o,
	XK_p,		XK_q,		XK_r,		XK_s,
	XK_t,		XK_u,		XK_v,		XK_w,
	XK_x,		XK_y,		XK_z,		XK_braceleft,
	XK_bar,		XK_braceright,	XK_asciitilde,	XK_BackSpace,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	NoSymbol,	NoSymbol,	NoSymbol,	NoSymbol,
	XK_nobreakspace,XK_exclamdown,	XK_cent,	XK_sterling,
	XK_currency,	XK_yen,		XK_brokenbar,	XK_section,
	XK_diaeresis,	XK_copyright,	XK_ordfeminine,	XK_guillemotleft,
	XK_notsign,	XK_hyphen,	XK_registered,	XK_macron,
	XK_degree,	XK_plusminus,	XK_twosuperior,	XK_threesuperior,
	XK_acute,	XK_mu,		XK_paragraph,	XK_periodcentered,
	XK_cedilla,	XK_onesuperior,	XK_masculine,	XK_guillemotright,
	XK_onequarter,	XK_onehalf,	XK_threequarters,XK_questiondown,
	XK_Agrave,	XK_Aacute,	XK_Acircumflex,	XK_Atilde,
	XK_Adiaeresis,	XK_Aring,	XK_AE,		XK_Ccedilla,
	XK_Egrave,	XK_Eacute,	XK_Ecircumflex,	XK_Ediaeresis,
	XK_Igrave,	XK_Iacute,	XK_Icircumflex,	XK_Idiaeresis,
	XK_ETH,		XK_Ntilde,	XK_Ograve,	XK_Oacute,
	XK_Ocircumflex,	XK_Otilde,	XK_Odiaeresis,	XK_multiply,
	XK_Ooblique,	XK_Ugrave,	XK_Uacute,	XK_Ucircumflex,
	XK_Udiaeresis,	XK_Yacute,	XK_THORN,	XK_ssharp,
	XK_agrave,	XK_aacute,	XK_acircumflex,	XK_atilde,
	XK_adiaeresis,	XK_aring,	XK_ae,		XK_ccedilla,
	XK_egrave,	XK_eacute,	XK_ecircumflex,	XK_ediaeresis,
	XK_igrave,	XK_iacute,	XK_icircumflex,	XK_idiaeresis,
	XK_eth,		XK_ntilde,	XK_ograve,	XK_oacute,
	XK_ocircumflex,	XK_otilde,	XK_odiaeresis,	XK_division,
	XK_oslash,	XK_ugrave,	XK_uacute,	XK_ucircumflex,
	XK_udiaeresis,	XK_yacute,	XK_thorn,	XK_ydiaeresis
};

/*
 * Maps the AT keycodes to Linux keycodes
 */
static unsigned char at2lnx[NUM_KEYCODES] =
{
	0x01,	/* KEY_Escape */	0x02,	/* KEY_1 */
	0x03,	/* KEY_2 */		0x04,	/* KEY_3 */
	0x05,	/* KEY_4 */		0x06,	/* KEY_5 */
	0x07,	/* KEY_6 */		0x08,	/* KEY_7 */
	0x09,	/* KEY_8 */		0x0a,	/* KEY_9 */
	0x0b,	/* KEY_0 */		0x0c,	/* KEY_Minus */
	0x0d,	/* KEY_Equal */		0x0e,	/* KEY_BackSpace */
	0x0f,	/* KEY_Tab */		0x10,	/* KEY_Q */
	0x11,	/* KEY_W */		0x12,	/* KEY_E */
	0x13,	/* KEY_R */		0x14,	/* KEY_T */
	0x15,	/* KEY_Y */		0x16,	/* KEY_U */
	0x17,	/* KEY_I */		0x18,	/* KEY_O */
	0x19,	/* KEY_P */		0x1a,	/* KEY_LBrace */
	0x1b,	/* KEY_RBrace */	0x1c,	/* KEY_Enter */
	0x1d,	/* KEY_LCtrl */		0x1e,	/* KEY_A */
	0x1f,	/* KEY_S */		0x20,	/* KEY_D */
	0x21,	/* KEY_F */		0x22,	/* KEY_G */
	0x23,	/* KEY_H */		0x24,	/* KEY_J */
	0x25,	/* KEY_K */		0x26,	/* KEY_L */
	0x27,	/* KEY_SemiColon */	0x28,	/* KEY_Quote */
	0x29,	/* KEY_Tilde */		0x2a,	/* KEY_ShiftL */
	0x2b,	/* KEY_BSlash */	0x2c,	/* KEY_Z */
	0x2d,	/* KEY_X */		0x2e,	/* KEY_C */
	0x2f,	/* KEY_V */		0x30,	/* KEY_B */
	0x31,	/* KEY_N */		0x32,	/* KEY_M */
	0x33,	/* KEY_Comma */		0x34,	/* KEY_Period */
	0x35,	/* KEY_Slash */		0x36,	/* KEY_ShiftR */
	0x37,	/* KEY_KP_Multiply */	0x38,	/* KEY_Alt */
	0x39,	/* KEY_Space */		0x3a,	/* KEY_CapsLock */
	0x3b,	/* KEY_F1 */		0x3c,	/* KEY_F2 */
	0x3d,	/* KEY_F3 */		0x3e,	/* KEY_F4 */
	0x3f,	/* KEY_F5 */		0x40,	/* KEY_F6 */
	0x41,	/* KEY_F7 */		0x42,	/* KEY_F8 */
	0x43,	/* KEY_F9 */		0x44,	/* KEY_F10 */
	0x45,	/* KEY_NumLock */	0x46,	/* KEY_ScrollLock */
	0x47,	/* KEY_KP_7 */		0x48,	/* KEY_KP_8 */
	0x49,	/* KEY_KP_9 */		0x4a,	/* KEY_KP_Minus */
	0x4b,	/* KEY_KP_4 */		0x4c,	/* KEY_KP_5 */
	0x4d,	/* KEY_KP_6 */		0x4e,	/* KEY_KP_Plus */
	0x4f,	/* KEY_KP_1 */		0x50,	/* KEY_KP_2 */
	0x51,	/* KEY_KP_3 */		0x52,	/* KEY_KP_0 */
	0x53,	/* KEY_KP_Decimal */	0x54,	/* KEY_SysReqest */
	0x00,	/* 0x55 */		0x56,	/* KEY_Less */
	0x57,	/* KEY_F11 */		0x58,	/* KEY_F12 */
	0x66,	/* KEY_Home */		0x67,	/* KEY_Up */
	0x68,	/* KEY_PgUp */		0x69,	/* KEY_Left */
	0x5d,	/* KEY_Begin */		0x6a,	/* KEY_Right */
	0x6b,	/* KEY_End */		0x6c,	/* KEY_Down */
	0x6d,	/* KEY_PgDown */	0x6e,	/* KEY_Insert */
	0x6f,	/* KEY_Delete */	0x60,	/* KEY_KP_Enter */
	0x61,	/* KEY_RCtrl */		0x77,	/* KEY_Pause */
	0x63,	/* KEY_Print */		0x62,	/* KEY_KP_Divide */
	0x64,	/* KEY_AltLang */	0x65,	/* KEY_Break */
	0x00,	/* KEY_LMeta */		0x00,	/* KEY_RMeta */
	0x7A,	/* KEY_Menu/FOCUS_PF11*/0x00,	/* 0x6e */
	0x7B,	/* FOCUS_PF12 */	0x00,	/* 0x70 */
	0x00,	/* 0x71 */		0x00,	/* 0x72 */
	0x59,	/* FOCUS_PF2 */		0x78,	/* FOCUS_PF9 */
	0x00,	/* 0x75 */		0x00,	/* 0x76 */
	0x5A,	/* FOCUS_PF3 */		0x5B,	/* FOCUS_PF4 */
	0x5C,	/* FOCUS_PF5 */		0x5D,	/* FOCUS_PF6 */
	0x5E,	/* FOCUS_PF7 */		0x5F,	/* FOCUS_PF8 */
	0x7C,	/* JAP_86 */		0x79,	/* FOCUS_PF10 */
	0x00,	/* 0x7f */
};

/** Create a private structure for use within this file. */
pointer kbdLinuxCreatePrivate(DeviceIntPtr pKeyboard)
{
    myPrivate *priv = calloc(1, sizeof(*priv));
    priv->fd        = -1;
    priv->pKeyboard = pKeyboard;
    return priv;
}

/** Destroy a private structure. */
void kbdLinuxDestroyPrivate(pointer priv)
{
    if (priv) free(priv);
}

/** Ring the bell.
 *
 * Note: we completely ignore the \a volume, since Linux's ioctl()
 * interface does not provide a way to control it.  If it did, the XBell
 * manpage tells how the actual volume is a function of the percent and
 * the (base) volume.
 *
 * Note that most of the other PC-based bell drivers compute the
 * duration for KDMKTONE as a function of the volume and the duration.
 * For some drivers, the duration is only measured in mS if the volume
 * is 50, and is scaled by the volume for other values.  This seems
 * confusing and possibly incorrect (the xset man page says that the
 * bell will be "as closely as it can to the user's specifications" --
 * if we ignore the volume and set the duration correctly, then we'll
 * get one parameter "wrong" -- but if we use the volume to scale the
 * duration, then we'll get both parameters "wrong"). */
void kbdLinuxBell(DevicePtr pDev, int percent,
                  int volume, int pitch, int duration)
{
    GETPRIV;

    if (duration && pitch) {
        ioctl(priv->fd,
              KDMKTONE,
              ((1193190 / pitch) & 0xffff) /* Low bits specify cycle time */
              | (duration << 16)); /* High bits are duration in msec */
    }
}

/** Set the LEDs. */
void kbdLinuxCtrl(DevicePtr pDev, KeybdCtrl *ctrl)
{
    GETPRIV;

    ioctl(priv->fd, KDSETLED, ctrl->leds & 0x07);
}

static int kbdLinuxGetFreeVTNumber(void)
{
    int        fd = -1;
    int        vtno;
    int        i;
    const char *tty0[] = { "/dev/tty0", "/dev/vc/0", NULL };
    
    for (i = 0; tty0[i]; i++)
        if ((fd = open(tty0[i], O_WRONLY, 0)) >= 0) break;
    if (fd < 0)
        FATAL1("kbdLinuxGetFreeVTNumber: Cannot open tty0 (%s)\n",
               strerror(errno));
    if (ioctl(fd, VT_OPENQRY, &vtno) < 0 || vtno < 0)
        FATAL0("kbdLinuxGetFreeVTNumber: Cannot find a free VT\n");
    return vtno;
}

static int kbdLinuxOpenVT(int vtno)
{
    int        fd = -1;
    int        i;
    const char *vcs[] = { "/dev/vc/%d", "/dev/tty%d", NULL };
    char       name[64];        /* RATS: Only used in XmuSnprintf */

    for (i = 0; vcs[i]; i++) {
        XmuSnprintf(name, sizeof(name), vcs[i], vtno);
        if ((fd = open(name, O_RDWR | O_NONBLOCK, 0)) >= 0) break;
    }
    if (fd < 0)
        FATAL2("kbdLinuxOpenVT: Cannot open VT %d (%s)\n",
               vtno, strerror(errno));
    return fd;
}

static int kbdLinuxGetCurrentVTNumber(int fd)
{
    struct vt_stat vts;
    
    if (!ioctl(fd, VT_GETSTATE, &vts)) return vts.v_active;
    return -1;
}

static int kbdLinuxActivate(int fd, int vtno, int setSig);

/** Currently unused hook called prior to an VT switch. */
void kbdLinuxVTPreSwitch(pointer p)
{
}

/** Currently unused hook called after returning from a VT switch. */
void kbdLinuxVTPostSwitch(pointer p)
{
}

/** Tell the operating system to switch to \a vt.  The \a switch_return
 * function is called with the \a switch_return_data when the VT is
 * switched back to the pre-switch VT (i.e., the user returns to the DMX
 * session). */
int kbdLinuxVTSwitch(pointer p, int vt,
                     void (*switch_return)(pointer),
                     pointer switch_return_data)
{
    myPrivate *priv = p;

    if (priv->switched) FATAL0("kbdLinuxVTSwitch: already switched...\n");
    if (priv->vtno == vt) return 0;

    PRIV                     = priv;
    priv->switched           = 0; /* Will switch to 1 in handler */
    priv->switch_return      = switch_return;
    priv->switch_return_data = switch_return_data;
    kbdLinuxActivate(priv->fd, vt, 0);
    return 1;
}

/* RATS: This function is only ever used to handle SIGUSR1. */
static void kbdLinuxVTSignalHandler(int sig)
{
    myPrivate *priv = PRIV;
    
    signal(sig, kbdLinuxVTSignalHandler);
    if (priv) {
        ioctl(priv->fd, VT_RELDISP, VT_ACKACQ);
        priv->switched = !priv->switched;
        LOG2("kbdLinuxVTSignalHandler: got signal %d, switched = %d\n",
             sig, priv->switched);
        if (!priv->switched && priv->switch_return)
            priv->switch_return(priv->switch_return_data);
    }
}

static int kbdLinuxActivate(int fd, int vtno, int setSig)
{
    int            result;
    struct vt_mode VT;

    SYSCALL(result = ioctl(fd, VT_ACTIVATE, vtno));
    if (result) FATAL0("kbdLinuxActivate: VT_ACTIVATE failed\n");
    SYSCALL(result = ioctl(fd, VT_WAITACTIVE, vtno));
    if (result) FATAL0("kbdLinuxActivate: VT_WAITACTIVE failed\n");
    if (setSig) {
        SYSCALL(result = ioctl(fd, VT_GETMODE, &VT));
        if (result < 0) FATAL0("kbdLinuxActivate: VT_GETMODE failed\n");
        VT.mode   = VT_PROCESS;
        VT.relsig = SIGUSR1;
        VT.acqsig = SIGUSR1;
        if (ioctl(fd, VT_SETMODE, &VT))
            FATAL0("kbdLinuxActivate: VT_SETMODE VT_PROCESS failed\n");
        signal(SIGUSR1, kbdLinuxVTSignalHandler);
    }
    return Success;
}

static void kbdLinuxOpenConsole(DevicePtr pDev)
{
    GETPRIV;
    const char *msg = MESSAGE;

    if (priv->fd >= 0) return;
    priv->vtno      = kbdLinuxGetFreeVTNumber();
    priv->fd        = kbdLinuxOpenVT(priv->vtno);
    priv->vtcurrent = kbdLinuxGetCurrentVTNumber(priv->fd);
    LOG2("kbdLinuxOpenConsole: current VT %d; using free VT %d\n",
         priv->vtcurrent, priv->vtno);
    kbdLinuxActivate(priv->fd, priv->vtno, 1);
    ioctl(priv->fd, KDSETMODE, KD_GRAPHICS); /* To turn off gpm */
    if (msg) write(priv->fd, msg, strlen(msg));
}

static void kbdLinuxCloseConsole(DevicePtr pDev)
{
    GETPRIV;
    struct vt_mode VT;
    const char     *msg = FINALMESSAGE;

    if (priv->fd < 0) return;

    ioctl(priv->fd, KDSETMODE, KD_TEXT);
    if (msg) write(priv->fd, msg, strlen(msg));
    if (ioctl(priv->fd, VT_GETMODE, &VT) != -1) {
        VT.mode = VT_AUTO;
        ioctl(priv->fd, VT_SETMODE, &VT);
    }

    LOG1("kbdLinuxCloseConsole: switching to VT %d\n", priv->vtcurrent);
    if (priv->vtcurrent >= 0) kbdLinuxActivate(priv->fd, priv->vtcurrent, 0);
    
    close(priv->fd);
    priv->fd = -1;
}

/** Initialize the \a pDev as a Linux keyboard. */
void kbdLinuxInit(DevicePtr pDev)
{
    GETPRIV;

    if (priv->fd <= 0) kbdLinuxOpenConsole(pDev);
    
    ioctl(priv->fd, KDGKBMODE, &priv->kbdtrans);
    if (tcgetattr(priv->fd, &priv->kbdtty) < 0)
        FATAL1("kbdLinuxInit: tcgetattr failed (%s)\n", strerror(errno));
}

static int kbdLinuxPrefix0Mapping(unsigned char *scanCode)
{
                                /* Table from xfree86/common/xf86Events.c */
    switch (*scanCode) {
    case KEY_KP_7:        *scanCode = KEY_Home;      break; /* curs home */
    case KEY_KP_8:        *scanCode = KEY_Up;        break; /* curs up */
    case KEY_KP_9:        *scanCode = KEY_PgUp;      break; /* curs pgup */
    case KEY_KP_4:        *scanCode = KEY_Left;      break; /* curs left */
    case KEY_KP_5:        *scanCode = KEY_Begin;     break; /* curs begin */
    case KEY_KP_6:        *scanCode = KEY_Right;     break; /* curs right */
    case KEY_KP_1:        *scanCode = KEY_End;       break; /* curs end */
    case KEY_KP_2:        *scanCode = KEY_Down;      break; /* curs down */
    case KEY_KP_3:        *scanCode = KEY_PgDown;    break; /* curs pgdown */
    case KEY_KP_0:        *scanCode = KEY_Insert;    break; /* curs insert */
    case KEY_KP_Decimal:  *scanCode = KEY_Delete;    break; /* curs delete */
    case KEY_Enter:       *scanCode = KEY_KP_Enter;  break; /* keypad enter */
    case KEY_LCtrl:       *scanCode = KEY_RCtrl;     break; /* right ctrl */
    case KEY_KP_Multiply: *scanCode = KEY_Print;     break; /* print */
    case KEY_Slash:       *scanCode = KEY_KP_Divide; break; /* keyp divide */
    case KEY_Alt:         *scanCode = KEY_AltLang;   break; /* right alt */
    case KEY_ScrollLock:  *scanCode = KEY_Break;     break; /* curs break */
    case 0x5b:            *scanCode = KEY_LMeta;     break;
    case 0x5c:            *scanCode = KEY_RMeta;     break;
    case 0x5d:            *scanCode = KEY_Menu;      break;
    case KEY_F3:          *scanCode = KEY_F13;       break;
    case KEY_F4:          *scanCode = KEY_F14;       break;
    case KEY_F5:          *scanCode = KEY_F15;       break;
    case KEY_F6:          *scanCode = KEY_F16;       break;
    case KEY_F7:          *scanCode = KEY_F17;       break;
    case KEY_KP_Plus:     *scanCode = KEY_KP_DEC;    break;
        /*
         * Ignore virtual shifts (E0 2A, E0 AA, E0 36, E0 B6)
         */
    case 0x2A:
    case 0x36:
        return 1;
    default:
        /*
         * "Internet" keyboards are generating lots of new codes.
         * Let them pass.  There is little consistency between them,
         * so don't bother with symbolic names at this level.
         */
        scanCode += 0x78;
    }
    return 0;
}

static int kbdLinuxPrefixMapping(myPrivate *priv, unsigned char *scanCode)
{
    int           pressed = *scanCode & 0x80;
    unsigned char code    = *scanCode & 0x7f;

                                /* If we don't have a prefix, check for one */
    if (!priv->prefix) {
        switch (code) {
        case KEY_Prefix0:
        case KEY_Prefix1:
            priv->prefix = code;
            return 1;
        }
        return 0;               /* No change */
    }

                                /* We have a prefix from the last scanCode */
    switch (priv->prefix) {
    case KEY_Prefix0:
        priv->prefix = 0;
        if (kbdLinuxPrefix0Mapping(&code)) return 1; /* Skip sequence */
        break;
    case KEY_Prefix1:
        priv->prefix = (code = KEY_LCtrl) ? KEY_LCtrl : 0;
        return 1;                                       /* Use new prefix */
    case KEY_LCtrl:
        priv->prefix = 0;
        if (code != KEY_NumLock) return 1;              /* Skip sequence*/
        code = KEY_Pause;
        break;
    }

    *scanCode = code | (pressed ? 0x80 : 0x00);
    return 0;                                           /* Use old scanCode */
}

static void kbdLinuxConvert(DevicePtr pDev,
                            unsigned char scanCode,
                            ENQUEUEPROC enqueue,
                            CHECKPROC checkspecial,
                            BLOCK block)
{
    GETPRIV;
    KeySymsPtr     pKeySyms = &priv->pKeyboard->key->curKeySyms;
    int            type;
    KeySym         keySym   = NoSymbol;
    int            keyCode;
    int            switching;

    /* Do special PC/AT prefix mapping -- may change scanCode! */
    if (kbdLinuxPrefixMapping(priv, &scanCode)) return;

    type    = (scanCode & 0x80) ? KeyRelease : KeyPress;
    keyCode = (scanCode & 0x7f) + MIN_KEYCODE;

    /* Handle repeats */
    
    if (keyCode >= pKeySyms->minKeyCode && keyCode <= pKeySyms->maxKeyCode) {
        keySym = pKeySyms->map[(keyCode - pKeySyms->minKeyCode)
                               * pKeySyms->mapWidth];
#if 0
        switch (keySym) {
        case XK_Num_Lock:
        case XK_Scroll_Lock:
        case XK_Shift_Lock:
        case XK_Caps_Lock:
            /* Ignore releases and all but first press */
            if (kbdLinuxModIgnore(priv, &xE, keySym)) return;
            if (kbdLinuxKeyDown(priv, &xE)) xE.u.u.type = KeyRelease;
            else                            xE.u.u.type = KeyPress;
            break;
        }
#endif
        
        /* If key is already down, ignore or autorepeat */
        if (type == KeyPress && kbdLinuxKeyDown(priv, keyCode)) {
            KbdFeedbackClassRec *feed = priv->pKeyboard->kbdfeed;

            /* No auto-repeat? */
            if ((feed && !feed->ctrl.autoRepeat)
                || priv->pKeyboard->key->modifierMap[keyCode]
                || (feed
                    && !(feed->ctrl.autoRepeats[keyCode >> 3]
                         & (1 << (keyCode & 7))))) return; /* Ignore */
            
            /* Do auto-repeat */
            enqueue(pDev, KeyRelease, keyCode, keySym, NULL, block);
            type = KeyPress;
        }
        
        /* If key is already up, ignore */
        if (type == KeyRelease && !kbdLinuxKeyDown(priv, keyCode)) return;
    }

    switching = 0;
    if (checkspecial && type == KeyPress)
        switching = checkspecial(pDev, keySym);
    if (!switching) {
        if (enqueue)
            enqueue(pDev, type, keyCode, keySym, NULL, block);
        kbdLinuxKeyState(priv, type, keyCode); /* Update our state bitmap */
    }
}

/** Read an event from the \a pDev device.  If the event is a motion
 * event, enqueue it with the \a motion function.  Otherwise, check for
 * special keys with the \a checkspecial function and enqueue the event
 * with the \a enqueue function.  The \a block type is passed to the
 * functions so that they may block SIGIO handling as appropriate to the
 * caller of this function. */
void kbdLinuxRead(DevicePtr pDev,
                  MOTIONPROC motion,
                  ENQUEUEPROC enqueue,
                  CHECKPROC checkspecial,
                  BLOCK block)
{
    GETPRIV;
    unsigned char buf[256];     /* RATS: Only used in length-limited call */
    unsigned char *pt;
    int           n;

    while ((n = read(priv->fd, buf, sizeof(buf))) > 0)
        for (pt = buf; n; --n, ++pt)
            kbdLinuxConvert(pDev, *pt, enqueue, checkspecial, block);
}

/** Turn \a pDev on (i.e., take input from \a pDev). */
int kbdLinuxOn(DevicePtr pDev)
{
    GETPRIV;
    struct termios nTty;

    ioctl(priv->fd, KDSKBMODE, K_RAW);

    nTty             = priv->kbdtty;
    nTty.c_iflag     = (IGNPAR | IGNBRK) & (~PARMRK) & (~ISTRIP);
    nTty.c_oflag     = 0;
    nTty.c_cflag     = CREAD | CS8;
    nTty.c_lflag     = 0;
    nTty.c_cc[VTIME] = 0;
    nTty.c_cc[VMIN]  = 1;
    cfsetispeed(&nTty, B9600);
    cfsetospeed(&nTty, B9600);
    if (tcsetattr(priv->fd, TCSANOW, &nTty) < 0)
        FATAL1("kbdLinuxOn: tcsetattr failed (%s)\n", strerror(errno));
    return priv->fd;
}

/** Turn \a pDev off (i.e., stop taking input from \a pDev). */
void kbdLinuxOff(DevicePtr pDev)
{
    GETPRIV;

    ioctl(priv->fd, KDSKBMODE, priv->kbdtrans);
    tcsetattr(priv->fd, TCSANOW, &priv->kbdtty);
    kbdLinuxCloseConsole(pDev);
}


static void kbdLinuxReadKernelMapping(int fd, KeySymsPtr pKeySyms)
{
    KeySym        *k;
    int           i;
    int           maxkey;
    static unsigned char tbl[GLYPHS_PER_KEY] = { /* RATS: Use ok */
        0,	/* unshifted */
        1,	/* shifted */
        0,	/* modeswitch unshifted */
        0	/* modeswitch shifted */
    };

  /*
   * Read the mapping from the kernel.
   * Since we're still using the XFree86 scancode->AT keycode mapping
   * routines, we need to convert the AT keycodes to Linux keycodes,
   * then translate the Linux keysyms into X keysyms.
   *
   * First, figure out which tables to use for the modeswitch columns
   * above, from the XF86Config fields.
   */
  tbl[2] = 8;	/* alt */
  tbl[3] = tbl[2] | 1;

#if 00/*BP*/
  k = map+GLYPHS_PER_KEY;
#else
  ErrorF("kbdLinuxReadKernelMapping() is broken/no-op'd\n");
  return;
#endif
  maxkey = NUM_AT2LNX;

  for (i = 0; i < maxkey; ++i) {
      struct kbentry kbe;
      int j;

      kbe.kb_index = at2lnx[i];

      for (j = 0; j < GLYPHS_PER_KEY; ++j, ++k) {
          unsigned short kval;

          *k = NoSymbol;

          kbe.kb_table = tbl[j];
          if (kbe.kb_index == 0 || ioctl(fd, KDGKBENT, &kbe)) continue;

          kval = KVAL(kbe.kb_value);
          switch (KTYP(kbe.kb_value)) {
          case KT_LATIN:
          case KT_LETTER: *k = linux_to_x[kval]; break;
          case KT_FN:
              if (kval <= 19) *k = XK_F1 + kval;
              else switch (kbe.kb_value) {
              case K_FIND:       *k = XK_Home; /* or XK_Find */      break;
              case K_INSERT:     *k = XK_Insert;                     break;
              case K_REMOVE:     *k = XK_Delete;                     break;
              case K_SELECT:     *k = XK_End; /* or XK_Select */     break;
              case K_PGUP:       *k = XK_Prior;                      break;
              case K_PGDN:       *k = XK_Next;                       break;
              case K_HELP:       *k = XK_Help;                       break;
              case K_DO:         *k = XK_Execute;                    break;
              case K_PAUSE:      *k = XK_Pause;                      break;
              case K_MACRO:      *k = XK_Menu;                       break;
              default:                                               break;
              }
              break;
          case KT_SPEC:
              switch (kbe.kb_value) {
              case K_ENTER:      *k = XK_Return;                     break;
              case K_BREAK:      *k = XK_Break;                      break;
              case K_CAPS:       *k = XK_Caps_Lock;                  break;
              case K_NUM:        *k = XK_Num_Lock;                   break;
              case K_HOLD:       *k = XK_Scroll_Lock;                break;
              case K_COMPOSE:    *k = XK_Multi_key;                  break;
              default:                                               break;
              }
              break;
          case KT_PAD:
              switch (kbe.kb_value) {
              case K_PPLUS:      *k = XK_KP_Add;                     break;
              case K_PMINUS:     *k = XK_KP_Subtract;                break;
              case K_PSTAR:      *k = XK_KP_Multiply;                break;
              case K_PSLASH:     *k = XK_KP_Divide;                  break;
              case K_PENTER:     *k = XK_KP_Enter;                   break;
              case K_PCOMMA:     *k = XK_KP_Separator;               break;
              case K_PDOT:       *k = XK_KP_Decimal;                 break;
              case K_PPLUSMINUS: *k = XK_KP_Subtract;                break;
              default:           if (kval <= 9) *k = XK_KP_0 + kval; break;
              }
              break;
          case KT_DEAD:
              /* KT_DEAD keys are for accelerated diacritical creation. */
              switch (kbe.kb_value) {
              case K_DGRAVE:     *k = XK_dead_grave;                 break;
              case K_DACUTE:     *k = XK_dead_acute;                 break;
              case K_DCIRCM:     *k = XK_dead_circumflex;            break;
              case K_DTILDE:     *k = XK_dead_tilde;                 break;
              case K_DDIERE:     *k = XK_dead_diaeresis;             break;
              }
              break;
          case KT_CUR:
              switch (kbe.kb_value) {
              case K_DOWN:       *k = XK_Down;                       break;
              case K_LEFT:       *k = XK_Left;                       break;
              case K_RIGHT:      *k = XK_Right;                      break;
              case K_UP:         *k = XK_Up;                         break;
              }
              break;
          case KT_SHIFT:
              switch (kbe.kb_value) {
              case K_ALTGR:      *k = XK_Alt_R;                       break;
              case K_ALT:
                  *k = (kbe.kb_index == 0x64 ? XK_Alt_R : XK_Alt_L);
                  break;
              case K_CTRL:
                  *k = (kbe.kb_index == 0x61 ? XK_Control_R : XK_Control_L);
                  break;
              case K_CTRLL:      *k = XK_Control_L;                   break;
              case K_CTRLR:      *k = XK_Control_R;                   break;
              case K_SHIFT:
                  *k = (kbe.kb_index == 0x36 ? XK_Shift_R : XK_Shift_L);
                  break;
              case K_SHIFTL:     *k = XK_Shift_L;                     break;
              case K_SHIFTR:     *k = XK_Shift_R;                     break;
              default:                                                break;
              }
              break;
          case KT_ASCII:
              /* KT_ASCII keys accumulate a 3 digit decimal number that
               * gets emitted when the shift state changes. We can't
               * emulate that.
               */
              break;
          case KT_LOCK:
              if (kbe.kb_value == K_SHIFTLOCK) *k = XK_Shift_Lock;
              break;
          default:                                                    break;
          }
      }
      
      if (k[-1] == k[-2])                   k[-1] = NoSymbol;
      if (k[-2] == k[-3])                   k[-2] = NoSymbol;
      if (k[-3] == k[-4])                   k[-3] = NoSymbol;
      if (k[-4] == k[-2] && k[-3] == k[-1]) k[-2] = k[-1] = NoSymbol;
      if (k[-1] == k[-4] && k[-2] == k[-3]
          && k[-2] == NoSymbol)             k[-1] = NoSymbol;
  }
}

static void kbdLinuxGetMap(DevicePtr pDev, KeySymsPtr pKeySyms, CARD8 *pModMap)
{
    GETPRIV;
    KeySym        *k, *mapCopy;
    char          type;
    int           i;

#if 00/*BP*/
    mapCopy = xalloc(sizeof(map));
    memcpy(mapCopy, map, sizeof(map));
#else
    ErrorF("kbdLinuxGetMap() is broken/no-op'd\n");
    return;
#endif

    kbdLinuxReadKernelMapping(priv->fd, pKeySyms);

    /* compute the modifier map */
    for (i = 0; i < MAP_LENGTH; i++)
        pModMap[i] = NoSymbol;  /* make sure it is restored */
  
    for (k = mapCopy, i = MIN_KEYCODE;
         i < NUM_KEYCODES + MIN_KEYCODE;
         i++, k += 4) {
        switch(*k) {
        case XK_Shift_L:
        case XK_Shift_R:     pModMap[i] = ShiftMask;      break;
        case XK_Control_L:
        case XK_Control_R:   pModMap[i] = ControlMask;    break;
        case XK_Caps_Lock:   pModMap[i] = LockMask;       break;
        case XK_Alt_L:
        case XK_Alt_R:       pModMap[i] = AltMask;        break;
        case XK_Num_Lock:    pModMap[i] = NumLockMask;    break;
        case XK_Scroll_Lock: pModMap[i] = ScrollLockMask; break;
        case XK_Kana_Lock:
        case XK_Kana_Shift:  pModMap[i] = KanaMask;       break;
        case XK_Mode_switch: pModMap[i] = AltLangMask;    break;
        }
    }

    priv->kbdType = (ioctl(priv->fd, KDGKBTYPE, &type) < 0) ? KB_101 : type;

    pKeySyms->map        = mapCopy; /* Must be XFree'able */
    pKeySyms->mapWidth   = GLYPHS_PER_KEY;
    pKeySyms->minKeyCode = MIN_KEYCODE;
    pKeySyms->maxKeyCode = MAX_KEYCODE;
}

/** Fill the \a info structure with information needed to initialize \a
 * pDev. */ 
void kbdLinuxGetInfo(DevicePtr pDev, DMXLocalInitInfoPtr info)
{
    info->keyboard         = 1;
    info->keyClass         = 1;
    kbdLinuxGetMap(pDev, &info->keySyms, info->modMap);
    info->focusClass       = 1;
    info->kbdFeedbackClass = 1;
}