x68kText.c revision 909daefd 
1/* $NetBSD: x68kText.c,v 1.2 2016/08/30 07:50:55 mrg Exp $ */
2/*-------------------------------------------------------------------------
3 * Copyright (c) 1996 Yasushi Yamasaki
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 *    must display the following acknowledgement:
16 *      This product includes software developed by Yasushi Yamasaki
17 * 4. The name of the author may not be used to endorse or promote products
18 *    derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *-----------------------------------------------------------------------*/
31
32#include "x68k.h"
33#include "mi.h"
34#include "micmap.h"
35#include "fb.h"
36#include "os.h"
37
38/*-------------------------------------------------------------------------
39 * function "x68kTextOpen"                          [ X68kFBProc function ]
40 *
41 *  purpose:  call common frame buffer opening procedure
42 *            and enable TVRAM simultaneous access mode
43 *  argument: (X68kScreenRec *)pPriv : X68k private screen record
44 *  returns:  (Bool): TRUE  if succeeded
45 *                    FALSE otherwise
46 *-----------------------------------------------------------------------*/
47static u_short r21;
48static u_short tpal0;
49static u_short tpal15;
50
51Bool
52x68kTextOpen(X68kScreenRec *pPriv)
53{
54    if( !x68kFbCommonOpen(pPriv, "/dev/grf0") )
55        return FALSE;
56
57    /* enable TVRAM simultaneous access mode */
58    r21 = pPriv->reg->crtc.r21;
59    pPriv->reg->crtc.r21 = 0x01f0;
60
61    /* initialize scroll registers */
62    pPriv->reg->crtc.r10 = pPriv->reg->crtc.r11 = 0;
63
64    tpal0 = pPriv->reg->tpal[0];
65    tpal15 = pPriv->reg->tpal[15];
66
67    pPriv->reg->tpal[0] = 0;
68    pPriv->reg->tpal[15] = 0xFFFE;
69
70    return TRUE;
71}
72
73/*-------------------------------------------------------------------------
74 * function "x68kTextClose"                        [ X68kFBProc function ]
75 *
76 *  purpose:  close text frame buffer
77 *  argument: nothing
78 *  returns:  nothing
79 *-----------------------------------------------------------------------*/
80void
81x68kTextClose(X68kScreenRec *pPriv)
82{
83    pPriv->reg->crtc.r21 = r21;  /* recover TVRAM mode */
84    pPriv->reg->tpal[0] = tpal0;
85    pPriv->reg->tpal[15] = tpal15;
86    x68kFbCommonClose(pPriv);
87}
88
89/*-------------------------------------------------------------------------
90 * function "x68kTextInit"                     [ called by DIX AddScreen ]
91 *
92 *  purpose:  initialize text frame buffer
93 *  argument: (ScreenPtr)pScreen       : DIX screen record
94 *            (int)argc, (char **)argv : standard C arguments
95 *  returns:  (Bool) TRUE  if succeeded
96 *                   FALSE otherwise
97 *-----------------------------------------------------------------------*/
98Bool
99x68kTextInit(ScreenPtr pScreen, int argc, char *argv[])
100{
101    X68kScreenRec *pPriv;
102
103    /* get private screen record set by X68KConfig */
104    pPriv = x68kGetScreenRecByType(X68K_FB_TEXT);
105
106    if ( !dixRegisterPrivateKey(&x68kScreenPrivateKeyRec, PRIVATE_SCREEN, 0) ) {
107            ErrorF("dixRegisterPrivateKey failed");
108            return FALSE;
109    }
110    x68kSetScreenPrivate(pScreen, pPriv);
111
112    if ( !fbScreenInit(pScreen, pPriv->fb,
113                        pPriv->scr_width, pPriv->scr_height,
114                        pPriv->dpi, pPriv->dpi, pPriv->fb_width, 1) )
115        return FALSE;
116    pScreen->whitePixel = 1;
117    pScreen->blackPixel = 0;
118    if ( !miDCInitialize(pScreen, &x68kPointerScreenFuncs) )
119        return FALSE;
120    if ( !miCreateDefColormap(pScreen) )
121        return FALSE;
122    pScreen->SaveScreen = x68kSaveScreen;
123
124    return TRUE;
125}
126
127/* EOF x68kText.c */
128