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