1 /*
2 Haiku S3 Trio64 driver adapted from the X.org S3 driver.
3
4 Copyright 2001 Ani Joshi <ajoshi@unixbox.com>
5
6 Copyright 2008 Haiku, Inc. All rights reserved.
7 Distributed under the terms of the MIT license.
8
9 Authors:
10 Gerald Zajac 2008
11 */
12
13
14 #include "accel.h"
15 #include "trio64.h"
16
17
18
19 static void
WaitQueue(uint32 slots)20 WaitQueue(uint32 slots )
21 {
22 // Wait until the requested number of queue slots are available.
23
24 while (ReadReg16(GP_STAT) & (0x0100 >> slots)) {}
25 }
26
27
28 static void
WaitIdle()29 WaitIdle()
30 {
31 // Wait until Graphics Processor is idle.
32
33 while (ReadReg16(GP_STAT) & GP_BUSY);
34 }
35
36
37
38 static bool
Trio64_GetColorSpaceParams(int colorSpace,uint32 & bitsPerPixel,uint32 & maxPixelClock)39 Trio64_GetColorSpaceParams(int colorSpace, uint32& bitsPerPixel, uint32& maxPixelClock)
40 {
41 // Get parameters for a color space which is supported by the Trio64 chips.
42 // Argument maxPixelClock is in KHz.
43 // Return true if the color space is supported; else return false.
44
45 switch (colorSpace) {
46 case B_RGB16:
47 bitsPerPixel = 16;
48 maxPixelClock = 110000;
49 break;
50 case B_CMAP8:
51 bitsPerPixel = 8;
52 maxPixelClock = 180000;
53 break;
54 default:
55 TRACE("Unsupported color space: 0x%X\n", colorSpace);
56 return false;
57 }
58
59 return true;
60 }
61
62
63 static bool
Trio64_IsModeUsable(const display_mode * mode)64 Trio64_IsModeUsable(const display_mode* mode)
65 {
66 // Test if the display mode is usable by the current video chip.
67 // Return true if the mode is usable.
68
69 SharedInfo& si = *gInfo.sharedInfo;
70
71 if (si.chipType == S3_TRIO64 && mode->timing.h_display >= 1600)
72 return false;
73
74 return IsModeUsable(mode);
75 }
76
77
78 static status_t
Trio64_Init(void)79 Trio64_Init(void)
80 {
81 TRACE("Trio64_Init()\n");
82
83 SharedInfo& si = *gInfo.sharedInfo;
84
85 // Use PIO to enable VGA, enable color instead of monochrome, and
86 // enable MMIO.
87
88 WritePIO_8(VGA_ENABLE, ReadPIO_8(VGA_ENABLE) | 0x01);
89 WritePIO_8(MISC_OUT_W, ReadPIO_8(MISC_OUT_R) | 0x01); // enable color
90
91 WritePIO_8(CRTC_INDEX, 0x53);
92 WritePIO_8(CRTC_DATA, ReadPIO_8(CRTC_DATA) | 0x8); // enable MMIO
93
94 WriteCrtcReg(0x38, 0x48); // unlock sys regs
95 WriteCrtcReg(0x39, 0xa5); // unlock sys regs
96
97 WriteCrtcReg(0x40, 0x01, 0x01);
98 WriteCrtcReg(0x35, 0x00, 0x30);
99 WriteCrtcReg(0x33, 0x20, 0x72);
100
101 if (si.chipType == S3_TRIO64_V2) {
102 WriteCrtcReg(0x86, 0x80);
103 WriteCrtcReg(0x90, 0x00);
104 }
105
106 // Detect number of megabytes of installed ram.
107
108 static const uint8 ramSizes[] = { 4, 0, 3, 8, 2, 6, 1, 0 };
109 int ramSizeMB = ramSizes[(ReadCrtcReg(0x36) >> 5) & 0x7];
110
111 TRACE("memory size: %d MB\n", ramSizeMB);
112
113 if (ramSizeMB <= 0)
114 return B_ERROR;
115
116 si.videoMemSize = ramSizeMB * 1024 * 1024;
117 si.cursorOffset = si.videoMemSize - CURSOR_BYTES; // put cursor at end of video memory
118 si.frameBufferOffset = 0;
119 si.maxFrameBufferSize = si.videoMemSize - CURSOR_BYTES;
120
121 // Detect current mclk.
122
123 WriteSeqReg(0x08, 0x06); // unlock extended sequencer regs
124
125 uint8 m = ReadSeqReg(0x11) & 0x7f;
126 uint8 n = ReadSeqReg(0x10);
127 uint8 n1 = n & 0x1f;
128 uint8 n2 = (n >> 5) & 0x03;
129 si.mclk = ((1431818 * (m + 2)) / (n1 + 2) / (1 << n2) + 50) / 100;
130
131 TRACE("MCLK value: %1.3f MHz\n", si.mclk / 1000.0);
132
133 // Set up the array of color spaces supported by the Trio64 chips.
134
135 si.colorSpaces[0] = B_CMAP8;
136 si.colorSpaces[1] = B_RGB16;
137 si.colorSpaceCount = 2;
138
139 si.bDisableHdwCursor = false; // allow use of hardware cursor
140 si.bDisableAccelDraw = false; // allow use of accelerated drawing functions
141
142 // Setup the mode list.
143
144 return CreateModeList(Trio64_IsModeUsable, NULL);
145 }
146
147
148 void
Trio64_SetFunctionPointers(void)149 Trio64_SetFunctionPointers(void)
150 {
151 // Setting the function pointers must be done prior to first ModeInit call
152 // or any accel activity.
153
154 gInfo.WaitQueue = WaitQueue;
155 gInfo.WaitIdleEmpty = WaitIdle;
156
157 gInfo.DPMSCapabilities = Trio64_DPMSCapabilities;
158 gInfo.GetDPMSMode = Trio64_GetDPMSMode;
159 gInfo.SetDPMSMode = Trio64_SetDPMSMode;
160
161 gInfo.LoadCursorImage = Trio64_LoadCursorImage;
162 gInfo.SetCursorPosition = Trio64_SetCursorPosition;
163 gInfo.ShowCursor = Trio64_ShowCursor;
164
165 // Note that the 2D accel functions set below do not work with all display
166 // modes; thus, when a mode is set, the function setting the mode will
167 // adjust the pointers according to the mode that is set.
168
169 gInfo.FillRectangle = Trio64_FillRectangle;
170 gInfo.FillSpan = Trio64_FillSpan;
171 gInfo.InvertRectangle = Trio64_InvertRectangle;
172 gInfo.ScreenToScreenBlit = Trio64_ScreenToScreenBlit;
173
174 gInfo.AdjustFrame = Trio64_AdjustFrame;
175 gInfo.ChipInit = Trio64_Init;
176 gInfo.GetColorSpaceParams = Trio64_GetColorSpaceParams;
177 gInfo.SetDisplayMode = Trio64_SetDisplayMode;
178 gInfo.SetIndexedColors = Trio64_SetIndexedColors;
179 }
180