Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/pc/vgatvp3020.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 #include "u.h" 2 #include "../port/lib.h" 3 #include "mem.h" 4 #include "dat.h" 5 #include "fns.h" 6 #include "io.h" 7 #include "../port/error.h" 8 9 #define Image IMAGE 10 #include <draw.h> 11 #include <memdraw.h> 12 #include <cursor.h> 13 #include "screen.h" 14 15 /* 16 * TVP3020 Viewpoint Video Interface Pallette. 17 * Assumes hooked up to an S3 86C928. 18 */ 19 enum { 20 Index = 0x06, /* Index register */ 21 Data = 0x07, /* Data register */ 22 }; 23 24 /* 25 * Lower 2-bits of indirect DAC register 26 * addressing. 27 */ 28 static ushort dacxreg[4] = { 29 PaddrW, Pdata, Pixmask, PaddrR 30 }; 31 32 static uchar 33 tvp3020io(uchar reg, uchar data) 34 { 35 uchar crt55; 36 37 crt55 = vgaxi(Crtx, 0x55) & 0xFC; 38 vgaxo(Crtx, 0x55, crt55|((reg>>2) & 0x03)); 39 vgao(dacxreg[reg & 0x03], data); 40 41 return crt55; 42 } 43 44 static void 45 tvp3020xo(uchar index, uchar data) 46 { 47 uchar crt55; 48 49 crt55 = tvp3020io(Index, index); 50 vgao(dacxreg[Data & 0x03], data); 51 vgaxo(Crtx, 0x55, crt55); 52 } 53 54 static void 55 tvp3020disable(VGAscr*) 56 { 57 uchar r; 58 59 /* 60 * Disable 61 * cursor; 62 * cursor control enable for Bt485 DAC (!); 63 * the hardware cursor external operation mode. 64 */ 65 tvp3020xo(0x06, 0x10); /* Cursor Control Register */ 66 67 r = vgaxi(Crtx, 0x45) & ~0x20; 68 vgaxo(Crtx, 0x45, r); 69 70 r = vgaxi(Crtx, 0x55) & ~0x20; 71 vgaxo(Crtx, 0x55, r); 72 } 73 74 static void 75 tvp3020enable(VGAscr*) 76 { 77 uchar r; 78 79 /* 80 * Make sure cursor is off by initialising the cursor 81 * control to defaults + X-Windows cursor mode. 82 */ 83 tvp3020xo(0x06, 0x10); /* Cursor Control Register */ 84 85 /* 86 * Overscan colour, 87 * cursor colour 1 (white), 88 * cursor colour 2 (black). 89 */ 90 tvp3020xo(0x20, Pwhite); tvp3020xo(0x21, Pwhite); tvp3020xo(0x22, Pwhite); 91 tvp3020xo(0x23, Pwhite); tvp3020xo(0x24, Pwhite); tvp3020xo(0x25, Pwhite); 92 tvp3020xo(0x26, Pblack); tvp3020xo(0x27, Pblack); tvp3020xo(0x28, Pblack); 93 94 /* 95 * Finally, enable 96 * the hardware cursor external operation mode; 97 * cursor control enable for Bt485 DAC (!). 98 */ 99 r = vgaxi(Crtx, 0x55)|0x20; 100 vgaxo(Crtx, 0x55, r); 101 102 r = vgaxi(Crtx, 0x45)|0x20; 103 vgaxo(Crtx, 0x45, r); 104 } 105 106 static void 107 tvp3020load(VGAscr*, Cursor* curs) 108 { 109 uchar p, p0, p1; 110 int x, y; 111 112 /* 113 * Make sure cursor is off by initialising the cursor 114 * control to defaults + X-Windows cursor mode. 115 */ 116 tvp3020xo(0x06, 0x10); /* Cursor Control Register */ 117 118 /* 119 * Initialise the cursor RAM LS and MS address 120 * (LS must be first). 121 */ 122 tvp3020xo(0x08, 0x00); /* Cursor RAM LS Address */ 123 tvp3020xo(0x09, 0x00); /* Cursor RAM MS Address */ 124 125 /* 126 * Initialise the 64x64 cursor RAM array. There are 2 planes, 127 * p0 and p1. Data is written 4 pixels per byte, with p1 the 128 * MS bit of each pixel. 129 * The cursor is set in X-Windows mode which gives the following 130 * truth table: 131 * p1 p0 colour 132 * 0 0 underlying pixel colour 133 * 0 1 underlying pixel colour 134 * 1 0 cursor colour 1 135 * 1 1 cursor colour 2 136 * Put the cursor into the top-left of the 64x64 array. 137 */ 138 for(y = 0; y < 64; y++){ 139 for(x = 0; x < 64/8; x++){ 140 if(x < 16/8 && y < 16){ 141 p0 = curs->clr[x+y*2]; 142 p1 = curs->set[x+y*2]; 143 144 p = 0x00; 145 if(p1 & 0x10) 146 p |= 0x03; 147 else if(p0 & 0x10) 148 p |= 0x02; 149 if(p1 & 0x20) 150 p |= 0x0C; 151 else if(p0 & 0x20) 152 p |= 0x08; 153 if(p1 & 0x40) 154 p |= 0x30; 155 else if(p0 & 0x40) 156 p |= 0x20; 157 if(p1 & 0x80) 158 p |= 0xC0; 159 else if(p0 & 0x80) 160 p |= 0x80; 161 tvp3020xo(0x0A, p); /* Cursor RAM Data */ 162 163 p = 0x00; 164 if(p1 & 0x01) 165 p |= 0x03; 166 else if(p0 & 0x01) 167 p |= 0x02; 168 if(p1 & 0x02) 169 p |= 0x0C; 170 else if(p0 & 0x02) 171 p |= 0x08; 172 if(p1 & 0x04) 173 p |= 0x30; 174 else if(p0 & 0x04) 175 p |= 0x20; 176 if(p1 & 0x08) 177 p |= 0xC0; 178 else if(p0 & 0x08) 179 p |= 0x80; 180 tvp3020xo(0x0A, p); /* Cursor RAM Data */ 181 } 182 else{ 183 tvp3020xo(0x0A, 0x00); /* Cursor RAM Data */ 184 tvp3020xo(0x0A, 0x00); 185 } 186 } 187 } 188 189 /* 190 * Initialise the cursor hotpoint 191 * and enable the cursor. 192 */ 193 tvp3020xo(0x04, -curs->offset.x); /* Sprite Origin X */ 194 tvp3020xo(0x05, -curs->offset.y); /* Sprite Origin Y */ 195 196 tvp3020xo(0x06, 0x40|0x10); /* Cursor Control Register */ 197 } 198 199 static int 200 tvp3020move(VGAscr*, Point p) 201 { 202 tvp3020xo(0x00, p.x & 0xFF); /* Cursor Position X LSB */ 203 tvp3020xo(0x01, (p.x>>8) & 0x0F); /* Cursor Position X MSB */ 204 tvp3020xo(0x02, p.y & 0xFF); /* Cursor Position Y LSB */ 205 tvp3020xo(0x03, (p.y>>8) & 0x0F); /* Cursor Position Y MSB */ 206 207 return 0; 208 } 209 210 VGAcur vgatvp3020cur = { 211 "tvp3020hwgc", 212 213 tvp3020enable, 214 tvp3020disable, 215 tvp3020load, 216 tvp3020move, 217 };
Cache object: 8fa293bc67343018f771c1faede35c09
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