1 /* $NetBSD: video_subr.c,v 1.3 2001/06/05 15:02:12 uch Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/malloc.h> 42 43 #include <machine/bootinfo.h> 44 45 #include <dev/hpc/video_subr.h> 46 47 #define BPP2 ({ \ 48 u_int8_t bitmap; \ 49 bitmap = *(volatile u_int8_t*)addr; \ 50 *(volatile u_int8_t*)addr = \ 51 (bitmap & ~(0x3 << ((3 - (x % 4)) * 2))); \ 52 }) 53 54 #define BPP4 ({ \ 55 u_int8_t bitmap; \ 56 bitmap = *(volatile u_int8_t*)addr; \ 57 *(volatile u_int8_t*)addr = \ 58 (bitmap & ~(0xf << ((1 - (x % 2)) * 4))); \ 59 }) 60 61 #define BPP8 ({ \ 62 *(volatile u_int8_t*)addr = 0xff; \ 63 }) 64 65 #define BRESENHAM(a, b, c, d, func) ({ \ 66 u_int32_t fbaddr = vc->vc_fbvaddr; \ 67 u_int32_t fbwidth = vc->vc_fbwidth; \ 68 u_int32_t fbdepth = vc->vc_fbdepth; \ 69 len = a, step = b -1; \ 70 if (step == 0) \ 71 return; \ 72 kstep = len == 0 ? 0 : 1; \ 73 for (i = k = 0, j = step / 2; i <= step; i++) { \ 74 x = xbase c; \ 75 y = ybase d; \ 76 addr = fbaddr + (((y * fbwidth + x) * fbdepth) >> 3); \ 77 func; \ 78 j -= len; \ 79 while (j < 0) { \ 80 j += step; \ 81 k += kstep; \ 82 } \ 83 } \ 84 }) 85 86 #define DRAWLINE(func) ({ \ 87 if (x < 0) { \ 88 if (y < 0) { \ 89 if (_y < _x) { \ 90 BRESENHAM(_y, _x, -i, -k, func); \ 91 } else { \ 92 BRESENHAM(_x, _y, -k, -i, func); \ 93 } \ 94 } else { \ 95 if (_y < _x) { \ 96 BRESENHAM(_y, _x, -i, +k, func); \ 97 } else { \ 98 BRESENHAM(_x, _y, -k, +i, func); \ 99 } \ 100 } \ 101 } else { \ 102 if (y < 0) { \ 103 if (_y < _x) { \ 104 BRESENHAM(_y, _x, +i, -k, func); \ 105 } else { \ 106 BRESENHAM(_x, _y, +k, -i, func); \ 107 } \ 108 } else { \ 109 if (_y < _x) { \ 110 BRESENHAM(_y, _x, +i, +k, func); \ 111 } else { \ 112 BRESENHAM(_x, _y, +k, +i, func); \ 113 } \ 114 } \ 115 } \ 116 }) 117 118 #define LINEFUNC(b) \ 119 static void linebpp##b (struct video_chip *, int, int, int, int); \ 120 static void \ 121 linebpp##b##(vc, x0, y0, x1, y1) \ 122 struct video_chip *vc; \ 123 int x0, y0, x1, y1; \ 124 { \ 125 u_int32_t addr; \ 126 int i, j, k, len, step, kstep; \ 127 int x, _x, y, _y; \ 128 int xbase, ybase; \ 129 x = x1 - x0; \ 130 y = y1 - y0; \ 131 _x = abs(x); \ 132 _y = abs(y); \ 133 xbase = x0; \ 134 ybase = y0; \ 135 DRAWLINE(BPP##b##); \ 136 } 137 138 #define DOTFUNC(b) \ 139 static void dotbpp##b (struct video_chip *, int, int); \ 140 static void \ 141 dotbpp##b##(vc, x, y) \ 142 struct video_chip *vc; \ 143 int x, y; \ 144 { \ 145 u_int32_t addr; \ 146 addr = vc->vc_fbvaddr + (((y * vc->vc_fbwidth + x) * \ 147 vc->vc_fbdepth) >> 3); \ 148 BPP##b; \ 149 } 150 151 LINEFUNC(2) 152 LINEFUNC(4) 153 LINEFUNC(8) 154 DOTFUNC(2) 155 DOTFUNC(4) 156 DOTFUNC(8) 157 static void linebpp_unimpl(struct video_chip *, int, int, int, int); 158 static void dotbpp_unimpl(struct video_chip *, int, int); 159 160 int 161 cmap_work_alloc(u_int8_t **r, u_int8_t **g, u_int8_t **b, u_int32_t **rgb, 162 int cnt) 163 { 164 KASSERT(LEGAL_CLUT_INDEX(cnt - 1)); 165 166 #define ALLOC_BUF(x, bit) \ 167 if (x) { \ 168 *x = malloc(cnt * sizeof(u_int ## bit ## _t), \ 169 M_DEVBUF, M_WAITOK); \ 170 if (*x == 0) \ 171 goto errout; \ 172 } 173 ALLOC_BUF(r, 8); 174 ALLOC_BUF(g, 8); 175 ALLOC_BUF(b, 8); 176 ALLOC_BUF(rgb, 32); 177 #undef ALLOCBUF 178 179 return (0); 180 errout: 181 cmap_work_free(*r, *g, *b, *rgb); 182 183 return (1); 184 } 185 186 void 187 cmap_work_free(u_int8_t *r, u_int8_t *g, u_int8_t *b, u_int32_t *rgb) 188 { 189 if (r) 190 free(r, M_DEVBUF); 191 if (g) 192 free(g, M_DEVBUF); 193 if (b) 194 free(b, M_DEVBUF); 195 if (rgb) 196 free(rgb, M_DEVBUF); 197 } 198 199 void 200 rgb24_compose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b, int cnt) 201 { 202 int i; 203 KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1)); 204 205 for (i = 0; i < cnt; i++) { 206 *rgb24++ = RGB24(r[i], g[i], b[i]); 207 } 208 } 209 210 void 211 rgb24_decompose(u_int32_t *rgb24, u_int8_t *r, u_int8_t *g, u_int8_t *b, 212 int cnt) 213 { 214 int i; 215 KASSERT(rgb24 && r && g && b && LEGAL_CLUT_INDEX(cnt - 1)); 216 217 for (i = 0; i < cnt; i++) { 218 u_int32_t rgb = *rgb24++; 219 *r++ = (rgb >> 16) & 0xff; 220 *g++ = (rgb >> 8) & 0xff; 221 *b++ = rgb & 0xff; 222 } 223 } 224 225 /* 226 * Debug routines. 227 */ 228 void 229 video_calibration_pattern(struct video_chip *vc) 230 { 231 int x, y; 232 233 x = vc->vc_fbwidth - 40; 234 y = vc->vc_fbheight - 40; 235 video_line(vc, 40, 40, x , 40); 236 video_line(vc, x , 40, x , y ); 237 video_line(vc, x , y , 40, y ); 238 video_line(vc, 40, y , 40, 40); 239 video_line(vc, 40, 40, x , y ); 240 video_line(vc, x, 40, 40, y ); 241 } 242 243 static void 244 linebpp_unimpl(struct video_chip *vc, int x0, int y0, int x1, int y1) 245 { 246 return; 247 } 248 249 static void 250 dotbpp_unimpl(struct video_chip *vc, int x, int y) 251 { 252 return; 253 } 254 255 void 256 video_attach_drawfunc(struct video_chip *vc) 257 { 258 switch (vc->vc_fbdepth) { 259 default: 260 vc->vc_drawline = linebpp_unimpl; 261 vc->vc_drawdot = dotbpp_unimpl; 262 break; 263 case 8: 264 vc->vc_drawline = linebpp8; 265 vc->vc_drawdot = dotbpp8; 266 break; 267 case 4: 268 vc->vc_drawline = linebpp4; 269 vc->vc_drawdot = dotbpp4; 270 break; 271 case 2: 272 vc->vc_drawline = linebpp2; 273 vc->vc_drawdot = dotbpp2; 274 break; 275 } 276 } 277 278 void 279 video_line(struct video_chip *vc, int x0, int y0, int x1, int y1) 280 { 281 if (vc->vc_drawline) 282 vc->vc_drawline(vc, x0, y0, x1, y1); 283 } 284 285 void 286 video_dot(struct video_chip *vc, int x, int y) 287 { 288 if (vc->vc_drawdot) 289 vc->vc_drawdot(vc, x, y); 290 } 291 292 int 293 video_reverse_color() 294 { 295 struct { 296 int reverse, normal; 297 } ctype[] = { 298 { BIFB_D2_M2L_3, BIFB_D2_M2L_0 }, 299 { BIFB_D2_M2L_3x2, BIFB_D2_M2L_0x2 }, 300 { BIFB_D8_FF, BIFB_D8_00 }, 301 { BIFB_D16_FFFF, BIFB_D16_0000, }, 302 { -1, -1 } /* terminator */ 303 }, *ctypep; 304 u_int16_t fbtype; 305 306 /* check reverse color */ 307 fbtype = bootinfo->fb_type; 308 for (ctypep = ctype; ctypep->normal != -1 ; ctypep++) { 309 if (fbtype == ctypep->normal) { 310 return (0); 311 } else if (fbtype == ctypep->reverse) { 312 return (1); 313 } 314 } 315 printf(": WARNING unknown frame buffer type 0x%04x.\n", fbtype); 316 return (0); 317 } 318