1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 1998 by Alan Hourihane, Wigan, England.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Permission to use, copy, modify, distribute, and sell this software and its
5*4882a593Smuzhiyun * documentation for any purpose is hereby granted without fee, provided that
6*4882a593Smuzhiyun * the above copyright notice appear in all copies and that both that
7*4882a593Smuzhiyun * copyright notice and this permission notice appear in supporting
8*4882a593Smuzhiyun * documentation, and that the name of Alan Hourihane not be used in
9*4882a593Smuzhiyun * advertising or publicity pertaining to distribution of the software without
10*4882a593Smuzhiyun * specific, written prior permission. Alan Hourihane makes no representations
11*4882a593Smuzhiyun * about the suitability of this software for any purpose. It is provided
12*4882a593Smuzhiyun * "as is" without express or implied warranty.
13*4882a593Smuzhiyun *
14*4882a593Smuzhiyun * ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15*4882a593Smuzhiyun * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16*4882a593Smuzhiyun * EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17*4882a593Smuzhiyun * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18*4882a593Smuzhiyun * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19*4882a593Smuzhiyun * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
20*4882a593Smuzhiyun * PERFORMANCE OF THIS SOFTWARE.
21*4882a593Smuzhiyun *
22*4882a593Smuzhiyun * Authors: Alan Hourihane, <alanh@fairlite.demon.co.uk>
23*4882a593Smuzhiyun *
24*4882a593Smuzhiyun * Generic RAMDAC access routines.
25*4882a593Smuzhiyun */
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun #ifdef HAVE_XORG_CONFIG_H
28*4882a593Smuzhiyun #include <xorg-config.h>
29*4882a593Smuzhiyun #endif
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun #include "xf86.h"
32*4882a593Smuzhiyun #include "xf86_OSproc.h"
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #include "xf86RamDacPriv.h"
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun int RamDacHWPrivateIndex = -1;
37*4882a593Smuzhiyun int RamDacScreenPrivateIndex = -1;
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun RamDacRecPtr
RamDacCreateInfoRec(void)40*4882a593Smuzhiyun RamDacCreateInfoRec(void)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun RamDacRecPtr infoRec;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun infoRec = calloc(1, sizeof(RamDacRec));
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return infoRec;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun RamDacHelperRecPtr
RamDacHelperCreateInfoRec(void)50*4882a593Smuzhiyun RamDacHelperCreateInfoRec(void)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun RamDacHelperRecPtr infoRec;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun infoRec = calloc(1, sizeof(RamDacHelperRec));
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun return infoRec;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun void
RamDacDestroyInfoRec(RamDacRecPtr infoRec)60*4882a593Smuzhiyun RamDacDestroyInfoRec(RamDacRecPtr infoRec)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun free(infoRec);
63*4882a593Smuzhiyun }
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun void
RamDacHelperDestroyInfoRec(RamDacHelperRecPtr infoRec)66*4882a593Smuzhiyun RamDacHelperDestroyInfoRec(RamDacHelperRecPtr infoRec)
67*4882a593Smuzhiyun {
68*4882a593Smuzhiyun free(infoRec);
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun Bool
RamDacInit(ScrnInfoPtr pScrn,RamDacRecPtr ramdacPriv)72*4882a593Smuzhiyun RamDacInit(ScrnInfoPtr pScrn, RamDacRecPtr ramdacPriv)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun RamDacScreenRecPtr ramdacScrPtr;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun /*
77*4882a593Smuzhiyun * make sure the RamDacRec is allocated
78*4882a593Smuzhiyun */
79*4882a593Smuzhiyun if (!RamDacGetRec(pScrn))
80*4882a593Smuzhiyun return FALSE;
81*4882a593Smuzhiyun ramdacScrPtr =
82*4882a593Smuzhiyun ((RamDacScreenRecPtr) (pScrn)->privates[RamDacGetScreenIndex()].ptr);
83*4882a593Smuzhiyun ramdacScrPtr->RamDacRec = ramdacPriv;
84*4882a593Smuzhiyun
85*4882a593Smuzhiyun return TRUE;
86*4882a593Smuzhiyun }
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun void
RamDacGetRecPrivate(void)89*4882a593Smuzhiyun RamDacGetRecPrivate(void)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun if (RamDacHWPrivateIndex < 0)
92*4882a593Smuzhiyun RamDacHWPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
93*4882a593Smuzhiyun if (RamDacScreenPrivateIndex < 0)
94*4882a593Smuzhiyun RamDacScreenPrivateIndex = xf86AllocateScrnInfoPrivateIndex();
95*4882a593Smuzhiyun return;
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun Bool
RamDacGetRec(ScrnInfoPtr scrp)99*4882a593Smuzhiyun RamDacGetRec(ScrnInfoPtr scrp)
100*4882a593Smuzhiyun {
101*4882a593Smuzhiyun RamDacGetRecPrivate();
102*4882a593Smuzhiyun /*
103*4882a593Smuzhiyun * New privates are always set to NULL, so we can check if the allocation
104*4882a593Smuzhiyun * has already been done.
105*4882a593Smuzhiyun */
106*4882a593Smuzhiyun if (scrp->privates[RamDacHWPrivateIndex].ptr != NULL)
107*4882a593Smuzhiyun return TRUE;
108*4882a593Smuzhiyun if (scrp->privates[RamDacScreenPrivateIndex].ptr != NULL)
109*4882a593Smuzhiyun return TRUE;
110*4882a593Smuzhiyun
111*4882a593Smuzhiyun scrp->privates[RamDacHWPrivateIndex].ptr =
112*4882a593Smuzhiyun xnfcalloc(sizeof(RamDacHWRec), 1);
113*4882a593Smuzhiyun scrp->privates[RamDacScreenPrivateIndex].ptr =
114*4882a593Smuzhiyun xnfcalloc(sizeof(RamDacScreenRec), 1);
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun return TRUE;
117*4882a593Smuzhiyun }
118*4882a593Smuzhiyun
119*4882a593Smuzhiyun void
RamDacFreeRec(ScrnInfoPtr pScrn)120*4882a593Smuzhiyun RamDacFreeRec(ScrnInfoPtr pScrn)
121*4882a593Smuzhiyun {
122*4882a593Smuzhiyun RamDacHWRecPtr ramdacHWPtr;
123*4882a593Smuzhiyun RamDacScreenRecPtr ramdacScrPtr;
124*4882a593Smuzhiyun
125*4882a593Smuzhiyun if (RamDacHWPrivateIndex < 0)
126*4882a593Smuzhiyun return;
127*4882a593Smuzhiyun
128*4882a593Smuzhiyun if (RamDacScreenPrivateIndex < 0)
129*4882a593Smuzhiyun return;
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun ramdacHWPtr = RAMDACHWPTR(pScrn);
132*4882a593Smuzhiyun ramdacScrPtr = ((RamDacScreenRecPtr)
133*4882a593Smuzhiyun (pScrn)->privates[RamDacGetScreenIndex()].ptr);
134*4882a593Smuzhiyun
135*4882a593Smuzhiyun free(ramdacHWPtr);
136*4882a593Smuzhiyun ramdacHWPtr = NULL;
137*4882a593Smuzhiyun
138*4882a593Smuzhiyun free(ramdacScrPtr);
139*4882a593Smuzhiyun ramdacScrPtr = NULL;
140*4882a593Smuzhiyun }
141*4882a593Smuzhiyun
142*4882a593Smuzhiyun int
RamDacGetHWIndex(void)143*4882a593Smuzhiyun RamDacGetHWIndex(void)
144*4882a593Smuzhiyun {
145*4882a593Smuzhiyun return RamDacHWPrivateIndex;
146*4882a593Smuzhiyun }
147*4882a593Smuzhiyun
148*4882a593Smuzhiyun int
RamDacGetScreenIndex(void)149*4882a593Smuzhiyun RamDacGetScreenIndex(void)
150*4882a593Smuzhiyun {
151*4882a593Smuzhiyun return RamDacScreenPrivateIndex;
152*4882a593Smuzhiyun }
153