event.c

Uboot源码,非常通用的bootloader.适用于各种平台的Linux系统引导.

/****************************************************************************
*
*                   SciTech Multi-platform Graphics Library
*
*  ========================================================================
*
*    The contents of this file are subject to the SciTech MGL Public
*    License Version 1.0 (the "License"); you may not use this file
*    except in compliance with the License. You may obtain a copy of
*    the License at http://www.scitechsoft.com/mgl-license.txt
*
*    Software distributed under the License is distributed on an
*    "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*    implied. See the License for the specific language governing
*    rights and limitations under the License.
*
*    The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc.
*
*    The Initial Developer of the Original Code is SciTech Software, Inc.
*    All Rights Reserved.
*
*  ========================================================================
*
* Language:     ANSI C
* Environment:  QNX
*
* Description:  QNX fullscreen console implementation for the SciTech
*               cross platform event library.
*
****************************************************************************/

#include <errno.h>
#include <unistd.h>

/*--------------------------- Global variables ----------------------------*/

#ifndef __QNXNTO__
static struct _mouse_ctrl   *_PM_mouse_ctl;
static int          _PM_keyboard_fd = -1;
/*static int            _PM_modifiers, _PM_leds; */
#else
static int          kbd_fd = -1, mouse_fd = -1;
#endif
static int          kill_pid = 0;
static ushort       keyUpMsg[256] = {0};/* Table of key up messages     */
static int          rangeX,rangeY;      /* Range of mouse coordinates   */

#define TIME_TO_MSEC(__t)   ((__t).tv_nsec / 1000000 + (__t).tv_sec * 1000)

#define LED_NUM         1
#define LED_CAP         2
#define LED_SCR         4

/* Scancode mappings on QNX for special keys */

typedef struct {
    int scan;
    int map;
    } keymap;

/* TODO: Fix this and set it up so we can do a binary search! */

keymap keymaps[] = {
    {96, KB_padEnter},
    {74, KB_padMinus},
    {78, KB_padPlus},
    {55, KB_padTimes},
    {98, KB_padDivide},
    {71, KB_padHome},
    {72, KB_padUp},
    {73, KB_padPageUp},
    {75, KB_padLeft},
    {76, KB_padCenter},
    {77, KB_padRight},
    {79, KB_padEnd},
    {80, KB_padDown},
    {81, KB_padPageDown},
    {82, KB_padInsert},
    {83, KB_padDelete},
    {105,KB_left},
    {108,KB_down},
    {106,KB_right},
    {103,KB_up},
    {110,KB_insert},
    {102,KB_home},
    {104,KB_pageUp},
    {111,KB_delete},
    {107,KB_end},
    {109,KB_pageDown},
    {125,KB_leftWindows},
    {126,KB_rightWindows},
    {127,KB_menu},
    {100,KB_rightAlt},
    {97,KB_rightCtrl},
    };

/* And the keypad with num lock turned on (changes the ASCII code only) */

keymap keypad[] = {
    {71, ASCII_7},
    {72, ASCII_8},
    {73, ASCII_9},
    {75, ASCII_4},
    {76, ASCII_5},
    {77, ASCII_6},
    {79, ASCII_1},
    {80, ASCII_2},
    {81, ASCII_3},
    {82, ASCII_0},
    {83, ASCII_period},
    };

#define NB_KEYMAPS (sizeof(keymaps)/sizeof(keymaps[0]))
#define NB_KEYPAD (sizeof(keypad)/sizeof(keypad[0]))

/*---------------------------- Implementation -----------------------------*/

/****************************************************************************
REMARKS:
Include generic raw scancode keyboard module.
****************************************************************************/
#include "common/keyboard.c"

/* These are not used under QNX */
#define _EVT_disableInt()       1
#define _EVT_restoreInt(flags)

/****************************************************************************
REMARKS:
This function is used to return the number of ticks since system
startup in milliseconds. This should be the same value that is placed into
the time stamp fields of events, and is used to implement auto mouse down
events.
****************************************************************************/
ulong _EVT_getTicks(void)
{
    struct timespec t;
    clock_gettime(CLOCK_REALTIME,&t);
    return (t.tv_nsec / 1000000 + t.tv_sec * 1000);
}

/****************************************************************************
REMARKS:
Converts a mickey movement value to a pixel adjustment value.
****************************************************************************/
static int MickeyToPixel(
    int mickey)
{
    /* TODO: We can add some code in here to handle 'acceleration' for */
    /*       the mouse cursor. For now just use the mickeys. */
    return mickey;
}

#ifdef __QNXNTO__
/****************************************************************************
REMARKS:
Retrieves all events from the mouse/keyboard event queue and stuffs them
into the MGL event queue for further processing.
****************************************************************************/
static void _EVT_pumpMessages(void)
{
    int         rc1, rc2;
    struct _keyboard_packet key;
    struct _mouse_packet    ms;
    static long     old_buttons = 0;
    uint            message = 0, but_stat = 0, mods = 0;
    event_t         evt;

    while (EVT.count < EVENTQSIZE) {
	rc1 = read(kbd_fd, (void *)&key, sizeof(key));
	if (rc1 == -1) {
	    if (errno == EAGAIN)
		rc1 = 0;
	    else {
		perror("getEvents");
		PM_fatalError("Keyboard error");
		}
	    }
	if (rc1 > 0) {
	    memset(&evt, 0, sizeof(evt));
	    if (key.data.modifiers & KEYMOD_SHIFT)
		mods |= EVT_LEFTSHIFT;
	    if (key.data.modifiers & KEYMOD_CTRL)
		mods |= EVT_CTRLSTATE;
	    if (key.data.modifiers & KEYMOD_ALT)
		mods |= EVT_ALTSTATE;

	    /* Now store the keyboard event data */
	    evt.when = TIME_TO_MSEC(key.time);
	    if (key.data.flags & KEY_SCAN_VALID)
		evt.message |= (key.data.key_scan & 0x7F) << 8;
	    if ((key.data.flags & KEY_SYM_VALID) &&
		(((key.data.key_sym & 0xff00) == 0xf000 &&
		(key.data.key_sym & 0xff) < 0x20) ||
		key.data.key_sym < 0x80))
		evt.message |= (key.data.key_sym & 0xFF);
	    evt.modifiers = mods;
	    if (key.data.flags & KEY_DOWN) {
		evt.what = EVT_KEYDOWN;
		keyUpMsg[evt.message >> 8] = (ushort)evt.message;
		}
	    else if (key.data.flags & KEY_REPEAT) {
		evt.message |= 0x10000;
		evt.what = EVT_KEYREPEAT;
		}
	    else {
		evt.what = EVT_KEYUP;
		evt.message = keyUpMsg[evt.message >> 8];
		if (evt.message == 0)
		    continue;
		keyUpMsg[evt.message >> 8] = 0;
		}

	    /* Now add the new event to the event queue */
	    addEvent(&evt);
	    }
	rc2 = read(mouse_fd, (void *)&ms, sizeof (ms));
	if (rc2 == -1) {
	    if (errno == EAGAIN)
		rc2 = 0;
	    else {
		perror("getEvents");
		PM_fatalError("Mouse error");
		}
	    }
	if (rc2 > 0) {
	    memset(&evt, 0, sizeof(evt));
	    ms.hdr.buttons &=
		(_POINTER_BUTTON_LEFT | _POINTER_BUTTON_RIGHT);
	    if (ms.hdr.buttons & _POINTER_BUTTON_LEFT)
		but_stat = EVT_LEFTBUT;
	    if ((ms.hdr.buttons & _POINTER_BUTTON_LEFT) !=
		(old_buttons & _POINTER_BUTTON_LEFT))
		message = EVT_LEFTBMASK;
	    if (ms.hdr.buttons & _POINTER_BUTTON_RIGHT)
		but_stat |= EVT_RIGHTBUT;
	    if ((ms.hdr.buttons & _POINTER_BUTTON_RIGHT) !=
		(old_buttons & _POINTER_BUTTON_RIGHT))
		message |= EVT_RIGHTBMASK;
	    if (ms.dx || ms.dy) {
		ms.dy = -ms.dy;
		EVT.mx += MickeyToPixel(ms.dx);
		EVT.my += MickeyToPixel(ms.dy);
		if (EVT.mx < 0) EVT.mx = 0;
		if (EVT.my < 0) EVT.my = 0;
		if (EVT.mx > rangeX)    EVT.mx = rangeX;
		if (EVT.my > rangeY)    EVT.my = rangeY;
		evt.what = EVT_MOUSEMOVE;
		evt.when = TIME_TO_MSEC(ms.hdr.time);
		evt.where_x = EVT.mx;
		evt.where_y = EVT.my;
		evt.relative_x = ms.dx;
		evt.relative_y = ms.dy;
		evt.modifiers = but_stat;
		addEvent(&evt);
		}
	    evt.what = ms.hdr.buttons < old_buttons ?
		EVT_MOUSEUP : EVT_MOUSEDOWN;
	    evt.when = TIME_TO_MSEC(ms.hdr.time);
	    evt.where_x = EVT.mx;
	    evt.where_y = EVT.my;
	    evt.relative_x = ms.dx;
	    evt.relative_y = ms.dy;
	    evt.modifiers = but_stat;
	    evt.message = message;
	    if (ms.hdr.buttons != old_buttons) {
		addEvent(&evt);
		old_buttons = ms.hdr.buttons;
		}
	    }
	if (rc1 + rc2 == 0)
	    break;
	}
}
#else
/****************************************************************************
REMARKS:
Retrieves all events from the mouse/keyboard event queue and stuffs them
into the MGL event queue for further processing.
****************************************************************************/
static void _EVT_pumpMessages(void)
{
    struct mouse_event      ev;
    int             rc;
    static long         old_buttons = 0;
    uint                message = 0, but_stat = 0;
    event_t             evt;
    char                buf[32];
    int             numkeys, i;

    /* Poll keyboard events */
    while ((numkeys = read(_PM_keyboard_fd, buf, sizeof buf)) > 0) {
	for (i = 0; i < numkeys; i++) {
	    processRawScanCode(buf[i]);
	    }
	}

    if (_PM_mouse_ctl == NULL)
	return;

    /* Gobble pending mouse events */