vt_vga.c revision 264997
1/*- 2 * Copyright (c) 2005 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Copyright (c) 2009 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Ed Schouten 9 * under sponsorship from the FreeBSD Foundation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33#include <sys/cdefs.h> 34__FBSDID("$FreeBSD: head/sys/dev/vt/hw/vga/vga.c 264997 2014-04-27 02:19:53Z nwhitehorn $"); 35 36#include <sys/param.h> 37#include <sys/kernel.h> 38#include <sys/systm.h> 39 40#include <dev/vt/vt.h> 41#include <dev/vt/hw/vga/vga_reg.h> 42 43#include <machine/bus.h> 44 45#if defined(__amd64__) || defined(__i386__) 46#include <vm/vm.h> 47#include <vm/pmap.h> 48#include <machine/metadata.h> 49#include <machine/pmap.h> 50#include <machine/vmparam.h> 51#include <sys/linker.h> 52#endif /* __amd64__ || __i386__ */ 53 54struct vga_softc { 55 bus_space_tag_t vga_fb_tag; 56 bus_space_handle_t vga_fb_handle; 57 bus_space_tag_t vga_reg_tag; 58 bus_space_handle_t vga_reg_handle; 59 int vga_curcolor; 60}; 61 62/* Convenience macros. */ 63#define MEM_READ1(sc, ofs) \ 64 bus_space_read_1(sc->vga_fb_tag, sc->vga_fb_handle, ofs) 65#define MEM_WRITE1(sc, ofs, val) \ 66 bus_space_write_1(sc->vga_fb_tag, sc->vga_fb_handle, ofs, val) 67#define REG_READ1(sc, reg) \ 68 bus_space_read_1(sc->vga_reg_tag, sc->vga_reg_handle, reg) 69#define REG_WRITE1(sc, reg, val) \ 70 bus_space_write_1(sc->vga_reg_tag, sc->vga_reg_handle, reg, val) 71 72#define VT_VGA_WIDTH 640 73#define VT_VGA_HEIGHT 480 74#define VT_VGA_MEMSIZE (VT_VGA_WIDTH * VT_VGA_HEIGHT / 8) 75 76static vd_init_t vga_init; 77static vd_blank_t vga_blank; 78static vd_bitbltchr_t vga_bitbltchr; 79static vd_maskbitbltchr_t vga_maskbitbltchr; 80static vd_drawrect_t vga_drawrect; 81static vd_setpixel_t vga_setpixel; 82static vd_putchar_t vga_putchar; 83static vd_postswitch_t vga_postswitch; 84 85static const struct vt_driver vt_vga_driver = { 86 .vd_init = vga_init, 87 .vd_blank = vga_blank, 88 .vd_bitbltchr = vga_bitbltchr, 89 .vd_maskbitbltchr = vga_maskbitbltchr, 90 .vd_drawrect = vga_drawrect, 91 .vd_setpixel = vga_setpixel, 92 .vd_putchar = vga_putchar, 93 .vd_postswitch = vga_postswitch, 94 .vd_priority = VD_PRIORITY_GENERIC, 95}; 96 97/* 98 * Driver supports both text mode and graphics mode. Make sure the 99 * buffer is always big enough to support both. 100 */ 101static struct vga_softc vga_conssoftc; 102VT_CONSDEV_DECLARE(vt_vga_driver, MAX(80, PIXEL_WIDTH(VT_VGA_WIDTH)), 103 MAX(25, PIXEL_HEIGHT(VT_VGA_HEIGHT)), &vga_conssoftc); 104 105static inline void 106vga_setcolor(struct vt_device *vd, term_color_t color) 107{ 108 struct vga_softc *sc = vd->vd_softc; 109 110 if (sc->vga_curcolor != color) { 111 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_SET_RESET); 112 REG_WRITE1(sc, VGA_GC_DATA, color); 113 sc->vga_curcolor = color; 114 } 115} 116 117static void 118vga_blank(struct vt_device *vd, term_color_t color) 119{ 120 struct vga_softc *sc = vd->vd_softc; 121 u_int ofs; 122 123 vga_setcolor(vd, color); 124 for (ofs = 0; ofs < VT_VGA_MEMSIZE; ofs++) 125 MEM_WRITE1(sc, ofs, 0xff); 126} 127 128static inline void 129vga_bitblt_put(struct vt_device *vd, u_long dst, term_color_t color, 130 uint8_t v) 131{ 132 struct vga_softc *sc = vd->vd_softc; 133 134 /* Skip empty writes, in order to avoid palette changes. */ 135 if (v != 0x00) { 136 vga_setcolor(vd, color); 137 /* 138 * When this MEM_READ1() gets disabled, all sorts of 139 * artifacts occur. This is because this read loads the 140 * set of 8 pixels that are about to be changed. There 141 * is one scenario where we can avoid the read, namely 142 * if all pixels are about to be overwritten anyway. 143 */ 144 if (v != 0xff) 145 MEM_READ1(sc, dst); 146 MEM_WRITE1(sc, dst, v); 147 } 148} 149 150static void 151vga_setpixel(struct vt_device *vd, int x, int y, term_color_t color) 152{ 153 154 vga_bitblt_put(vd, (y * VT_VGA_WIDTH / 8) + (x / 8), color, 155 0x80 >> (x % 8)); 156} 157 158static void 159vga_drawrect(struct vt_device *vd, int x1, int y1, int x2, int y2, int fill, 160 term_color_t color) 161{ 162 int x, y; 163 164 for (y = y1; y <= y2; y++) { 165 if (fill || (y == y1) || (y == y2)) { 166 for (x = x1; x <= x2; x++) 167 vga_setpixel(vd, x, y, color); 168 } else { 169 vga_setpixel(vd, x1, y, color); 170 vga_setpixel(vd, x2, y, color); 171 } 172 } 173} 174 175static inline void 176vga_bitblt_draw(struct vt_device *vd, const uint8_t *src, 177 u_long ldst, uint8_t shift, unsigned int width, unsigned int height, 178 term_color_t color, int negate) 179{ 180 u_long dst; 181 int w; 182 uint8_t b, r, out; 183 184 for (; height > 0; height--) { 185 dst = ldst; 186 ldst += VT_VGA_WIDTH / 8; 187 r = 0; 188 for (w = width; w > 0; w -= 8) { 189 b = *src++; 190 if (negate) { 191 b = ~b; 192 /* Don't go too far. */ 193 if (w < 8) 194 b &= 0xff << (8 - w); 195 } 196 /* Reintroduce bits from previous column. */ 197 out = (b >> shift) | r; 198 r = b << (8 - shift); 199 vga_bitblt_put(vd, dst++, color, out); 200 } 201 /* Print the remainder. */ 202 vga_bitblt_put(vd, dst, color, r); 203 } 204} 205 206static void 207vga_bitbltchr(struct vt_device *vd, const uint8_t *src, const uint8_t *mask, 208 int bpl, vt_axis_t top, vt_axis_t left, unsigned int width, 209 unsigned int height, term_color_t fg, term_color_t bg) 210{ 211 u_long dst, ldst; 212 int w; 213 214 /* Don't try to put off screen pixels */ 215 if (((left + width) > VT_VGA_WIDTH) || ((top + height) > 216 VT_VGA_HEIGHT)) 217 return; 218 219 dst = (VT_VGA_WIDTH * top + left) / 8; 220 221 for (; height > 0; height--) { 222 ldst = dst; 223 for (w = width; w > 0; w -= 8) { 224 vga_bitblt_put(vd, ldst, fg, *src); 225 vga_bitblt_put(vd, ldst, bg, ~*src); 226 ldst++; 227 src++; 228 } 229 dst += VT_VGA_WIDTH / 8; 230 } 231} 232 233/* Bitblt with mask support. Slow. */ 234static void 235vga_maskbitbltchr(struct vt_device *vd, const uint8_t *src, const uint8_t *mask, 236 int bpl, vt_axis_t top, vt_axis_t left, unsigned int width, 237 unsigned int height, term_color_t fg, term_color_t bg) 238{ 239 struct vga_softc *sc = vd->vd_softc; 240 u_long dst; 241 uint8_t shift; 242 243 dst = (VT_VGA_WIDTH * top + left) / 8; 244 shift = left % 8; 245 246 /* Don't try to put off screen pixels */ 247 if (((left + width) > VT_VGA_WIDTH) || ((top + height) > 248 VT_VGA_HEIGHT)) 249 return; 250 251 if (sc->vga_curcolor == fg) { 252 vga_bitblt_draw(vd, src, dst, shift, width, height, fg, 0); 253 vga_bitblt_draw(vd, src, dst, shift, width, height, bg, 1); 254 } else { 255 vga_bitblt_draw(vd, src, dst, shift, width, height, bg, 1); 256 vga_bitblt_draw(vd, src, dst, shift, width, height, fg, 0); 257 } 258} 259 260/* 261 * Binary searchable table for Unicode to CP437 conversion. 262 */ 263 264struct unicp437 { 265 uint16_t unicode_base; 266 uint8_t cp437_base; 267 uint8_t length; 268}; 269 270static const struct unicp437 cp437table[] = { 271 { 0x0020, 0x20, 0x5e }, { 0x00a0, 0x20, 0x00 }, 272 { 0x00a1, 0xad, 0x00 }, { 0x00a2, 0x9b, 0x00 }, 273 { 0x00a3, 0x9c, 0x00 }, { 0x00a5, 0x9d, 0x00 }, 274 { 0x00a7, 0x15, 0x00 }, { 0x00aa, 0xa6, 0x00 }, 275 { 0x00ab, 0xae, 0x00 }, { 0x00ac, 0xaa, 0x00 }, 276 { 0x00b0, 0xf8, 0x00 }, { 0x00b1, 0xf1, 0x00 }, 277 { 0x00b2, 0xfd, 0x00 }, { 0x00b5, 0xe6, 0x00 }, 278 { 0x00b6, 0x14, 0x00 }, { 0x00b7, 0xfa, 0x00 }, 279 { 0x00ba, 0xa7, 0x00 }, { 0x00bb, 0xaf, 0x00 }, 280 { 0x00bc, 0xac, 0x00 }, { 0x00bd, 0xab, 0x00 }, 281 { 0x00bf, 0xa8, 0x00 }, { 0x00c4, 0x8e, 0x01 }, 282 { 0x00c6, 0x92, 0x00 }, { 0x00c7, 0x80, 0x00 }, 283 { 0x00c9, 0x90, 0x00 }, { 0x00d1, 0xa5, 0x00 }, 284 { 0x00d6, 0x99, 0x00 }, { 0x00dc, 0x9a, 0x00 }, 285 { 0x00df, 0xe1, 0x00 }, { 0x00e0, 0x85, 0x00 }, 286 { 0x00e1, 0xa0, 0x00 }, { 0x00e2, 0x83, 0x00 }, 287 { 0x00e4, 0x84, 0x00 }, { 0x00e5, 0x86, 0x00 }, 288 { 0x00e6, 0x91, 0x00 }, { 0x00e7, 0x87, 0x00 }, 289 { 0x00e8, 0x8a, 0x00 }, { 0x00e9, 0x82, 0x00 }, 290 { 0x00ea, 0x88, 0x01 }, { 0x00ec, 0x8d, 0x00 }, 291 { 0x00ed, 0xa1, 0x00 }, { 0x00ee, 0x8c, 0x00 }, 292 { 0x00ef, 0x8b, 0x00 }, { 0x00f0, 0xeb, 0x00 }, 293 { 0x00f1, 0xa4, 0x00 }, { 0x00f2, 0x95, 0x00 }, 294 { 0x00f3, 0xa2, 0x00 }, { 0x00f4, 0x93, 0x00 }, 295 { 0x00f6, 0x94, 0x00 }, { 0x00f7, 0xf6, 0x00 }, 296 { 0x00f8, 0xed, 0x00 }, { 0x00f9, 0x97, 0x00 }, 297 { 0x00fa, 0xa3, 0x00 }, { 0x00fb, 0x96, 0x00 }, 298 { 0x00fc, 0x81, 0x00 }, { 0x00ff, 0x98, 0x00 }, 299 { 0x0192, 0x9f, 0x00 }, { 0x0393, 0xe2, 0x00 }, 300 { 0x0398, 0xe9, 0x00 }, { 0x03a3, 0xe4, 0x00 }, 301 { 0x03a6, 0xe8, 0x00 }, { 0x03a9, 0xea, 0x00 }, 302 { 0x03b1, 0xe0, 0x01 }, { 0x03b4, 0xeb, 0x00 }, 303 { 0x03b5, 0xee, 0x00 }, { 0x03bc, 0xe6, 0x00 }, 304 { 0x03c0, 0xe3, 0x00 }, { 0x03c3, 0xe5, 0x00 }, 305 { 0x03c4, 0xe7, 0x00 }, { 0x03c6, 0xed, 0x00 }, 306 { 0x03d5, 0xed, 0x00 }, { 0x2010, 0x2d, 0x00 }, 307 { 0x2014, 0x2d, 0x00 }, { 0x2018, 0x60, 0x00 }, 308 { 0x2019, 0x27, 0x00 }, { 0x201c, 0x22, 0x00 }, 309 { 0x201d, 0x22, 0x00 }, { 0x2022, 0x07, 0x00 }, 310 { 0x203c, 0x13, 0x00 }, { 0x207f, 0xfc, 0x00 }, 311 { 0x20a7, 0x9e, 0x00 }, { 0x20ac, 0xee, 0x00 }, 312 { 0x2126, 0xea, 0x00 }, { 0x2190, 0x1b, 0x00 }, 313 { 0x2191, 0x18, 0x00 }, { 0x2192, 0x1a, 0x00 }, 314 { 0x2193, 0x19, 0x00 }, { 0x2194, 0x1d, 0x00 }, 315 { 0x2195, 0x12, 0x00 }, { 0x21a8, 0x17, 0x00 }, 316 { 0x2202, 0xeb, 0x00 }, { 0x2208, 0xee, 0x00 }, 317 { 0x2211, 0xe4, 0x00 }, { 0x2212, 0x2d, 0x00 }, 318 { 0x2219, 0xf9, 0x00 }, { 0x221a, 0xfb, 0x00 }, 319 { 0x221e, 0xec, 0x00 }, { 0x221f, 0x1c, 0x00 }, 320 { 0x2229, 0xef, 0x00 }, { 0x2248, 0xf7, 0x00 }, 321 { 0x2261, 0xf0, 0x00 }, { 0x2264, 0xf3, 0x00 }, 322 { 0x2265, 0xf2, 0x00 }, { 0x2302, 0x7f, 0x00 }, 323 { 0x2310, 0xa9, 0x00 }, { 0x2320, 0xf4, 0x00 }, 324 { 0x2321, 0xf5, 0x00 }, { 0x2500, 0xc4, 0x00 }, 325 { 0x2502, 0xb3, 0x00 }, { 0x250c, 0xda, 0x00 }, 326 { 0x2510, 0xbf, 0x00 }, { 0x2514, 0xc0, 0x00 }, 327 { 0x2518, 0xd9, 0x00 }, { 0x251c, 0xc3, 0x00 }, 328 { 0x2524, 0xb4, 0x00 }, { 0x252c, 0xc2, 0x00 }, 329 { 0x2534, 0xc1, 0x00 }, { 0x253c, 0xc5, 0x00 }, 330 { 0x2550, 0xcd, 0x00 }, { 0x2551, 0xba, 0x00 }, 331 { 0x2552, 0xd5, 0x00 }, { 0x2553, 0xd6, 0x00 }, 332 { 0x2554, 0xc9, 0x00 }, { 0x2555, 0xb8, 0x00 }, 333 { 0x2556, 0xb7, 0x00 }, { 0x2557, 0xbb, 0x00 }, 334 { 0x2558, 0xd4, 0x00 }, { 0x2559, 0xd3, 0x00 }, 335 { 0x255a, 0xc8, 0x00 }, { 0x255b, 0xbe, 0x00 }, 336 { 0x255c, 0xbd, 0x00 }, { 0x255d, 0xbc, 0x00 }, 337 { 0x255e, 0xc6, 0x01 }, { 0x2560, 0xcc, 0x00 }, 338 { 0x2561, 0xb5, 0x00 }, { 0x2562, 0xb6, 0x00 }, 339 { 0x2563, 0xb9, 0x00 }, { 0x2564, 0xd1, 0x01 }, 340 { 0x2566, 0xcb, 0x00 }, { 0x2567, 0xcf, 0x00 }, 341 { 0x2568, 0xd0, 0x00 }, { 0x2569, 0xca, 0x00 }, 342 { 0x256a, 0xd8, 0x00 }, { 0x256b, 0xd7, 0x00 }, 343 { 0x256c, 0xce, 0x00 }, { 0x2580, 0xdf, 0x00 }, 344 { 0x2584, 0xdc, 0x00 }, { 0x2588, 0xdb, 0x00 }, 345 { 0x258c, 0xdd, 0x00 }, { 0x2590, 0xde, 0x00 }, 346 { 0x2591, 0xb0, 0x02 }, { 0x25a0, 0xfe, 0x00 }, 347 { 0x25ac, 0x16, 0x00 }, { 0x25b2, 0x1e, 0x00 }, 348 { 0x25ba, 0x10, 0x00 }, { 0x25bc, 0x1f, 0x00 }, 349 { 0x25c4, 0x11, 0x00 }, { 0x25cb, 0x09, 0x00 }, 350 { 0x25d8, 0x08, 0x00 }, { 0x25d9, 0x0a, 0x00 }, 351 { 0x263a, 0x01, 0x01 }, { 0x263c, 0x0f, 0x00 }, 352 { 0x2640, 0x0c, 0x00 }, { 0x2642, 0x0b, 0x00 }, 353 { 0x2660, 0x06, 0x00 }, { 0x2663, 0x05, 0x00 }, 354 { 0x2665, 0x03, 0x01 }, { 0x266a, 0x0d, 0x01 }, 355}; 356 357static uint8_t 358vga_get_cp437(term_char_t c) 359{ 360 int min, mid, max; 361 362 min = 0; 363 max = (sizeof(cp437table) / sizeof(struct unicp437)) - 1; 364 365 if (c < cp437table[0].unicode_base || 366 c > cp437table[max].unicode_base + cp437table[max].length) 367 return '?'; 368 369 while (max >= min) { 370 mid = (min + max) / 2; 371 if (c < cp437table[mid].unicode_base) 372 max = mid - 1; 373 else if (c > cp437table[mid].unicode_base + 374 cp437table[mid].length) 375 min = mid + 1; 376 else 377 return (c - cp437table[mid].unicode_base + 378 cp437table[mid].cp437_base); 379 } 380 381 return '?'; 382} 383 384static void 385vga_putchar(struct vt_device *vd, term_char_t c, 386 vt_axis_t top, vt_axis_t left, term_color_t fg, term_color_t bg) 387{ 388 struct vga_softc *sc = vd->vd_softc; 389 uint8_t ch, attr; 390 391 /* 392 * Convert character to CP437, which is the character set used 393 * by the VGA hardware by default. 394 */ 395 ch = vga_get_cp437(c); 396 397 /* 398 * Convert colors to VGA attributes. 399 */ 400 attr = bg << 4 | fg; 401 402 MEM_WRITE1(sc, 0x18000 + (top * 80 + left) * 2 + 0, ch); 403 MEM_WRITE1(sc, 0x18000 + (top * 80 + left) * 2 + 1, attr); 404} 405 406static void 407vga_initialize_graphics(struct vt_device *vd) 408{ 409 struct vga_softc *sc = vd->vd_softc; 410 411 /* Clock select. */ 412 REG_WRITE1(sc, VGA_GEN_MISC_OUTPUT_W, VGA_GEN_MO_VSP | VGA_GEN_MO_HSP | 413 VGA_GEN_MO_PB | VGA_GEN_MO_ER | VGA_GEN_MO_IOA); 414 /* Set sequencer clocking and memory mode. */ 415 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_CLOCKING_MODE); 416 REG_WRITE1(sc, VGA_SEQ_DATA, VGA_SEQ_CM_89); 417 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_MEMORY_MODE); 418 REG_WRITE1(sc, VGA_SEQ_DATA, VGA_SEQ_MM_OE | VGA_SEQ_MM_EM); 419 420 /* Set the graphics controller in graphics mode. */ 421 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_MISCELLANEOUS); 422 REG_WRITE1(sc, VGA_GC_DATA, 0x04 + VGA_GC_MISC_GA); 423 /* Program the CRT controller. */ 424 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_HORIZ_TOTAL); 425 REG_WRITE1(sc, VGA_CRTC_DATA, 0x5f); /* 760 */ 426 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_HORIZ_DISP_END); 427 REG_WRITE1(sc, VGA_CRTC_DATA, 0x4f); /* 640 - 8 */ 428 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_START_HORIZ_BLANK); 429 REG_WRITE1(sc, VGA_CRTC_DATA, 0x50); /* 640 */ 430 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_END_HORIZ_BLANK); 431 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_EHB_CR + 2); 432 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_START_HORIZ_RETRACE); 433 REG_WRITE1(sc, VGA_CRTC_DATA, 0x54); /* 672 */ 434 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_END_HORIZ_RETRACE); 435 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_EHR_EHB + 0); 436 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_VERT_TOTAL); 437 REG_WRITE1(sc, VGA_CRTC_DATA, 0x0b); /* 523 */ 438 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_OVERFLOW); 439 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_OF_VT9 | VGA_CRTC_OF_LC8 | 440 VGA_CRTC_OF_VBS8 | VGA_CRTC_OF_VRS8 | VGA_CRTC_OF_VDE8); 441 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MAX_SCAN_LINE); 442 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_MSL_LC9); 443 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_VERT_RETRACE_START); 444 REG_WRITE1(sc, VGA_CRTC_DATA, 0xea); /* 480 + 10 */ 445 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_VERT_RETRACE_END); 446 REG_WRITE1(sc, VGA_CRTC_DATA, 0x0c); 447 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_VERT_DISPLAY_END); 448 REG_WRITE1(sc, VGA_CRTC_DATA, 0xdf); /* 480 - 1*/ 449 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_OFFSET); 450 REG_WRITE1(sc, VGA_CRTC_DATA, 0x28); 451 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_START_VERT_BLANK); 452 REG_WRITE1(sc, VGA_CRTC_DATA, 0xe7); /* 480 + 7 */ 453 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_END_VERT_BLANK); 454 REG_WRITE1(sc, VGA_CRTC_DATA, 0x04); 455 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MODE_CONTROL); 456 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_MC_WB | VGA_CRTC_MC_AW | 457 VGA_CRTC_MC_SRS | VGA_CRTC_MC_CMS); 458 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_LINE_COMPARE); 459 REG_WRITE1(sc, VGA_CRTC_DATA, 0xff); /* 480 + 31 */ 460 461 REG_WRITE1(sc, VGA_GEN_FEATURE_CTRL_W, 0); 462 463 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_MAP_MASK); 464 REG_WRITE1(sc, VGA_SEQ_DATA, VGA_SEQ_MM_EM3 | VGA_SEQ_MM_EM2 | 465 VGA_SEQ_MM_EM1 | VGA_SEQ_MM_EM0); 466 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_CHAR_MAP_SELECT); 467 REG_WRITE1(sc, VGA_SEQ_DATA, 0); 468 469 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_SET_RESET); 470 REG_WRITE1(sc, VGA_GC_DATA, 0); 471 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_ENABLE_SET_RESET); 472 REG_WRITE1(sc, VGA_GC_DATA, 0x0f); 473 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_COLOR_COMPARE); 474 REG_WRITE1(sc, VGA_GC_DATA, 0); 475 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_DATA_ROTATE); 476 REG_WRITE1(sc, VGA_GC_DATA, 0); 477 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_READ_MAP_SELECT); 478 REG_WRITE1(sc, VGA_GC_DATA, 0); 479 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_MODE); 480 REG_WRITE1(sc, VGA_GC_DATA, 0); 481 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_COLOR_DONT_CARE); 482 REG_WRITE1(sc, VGA_GC_DATA, 0x0f); 483 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_BIT_MASK); 484 REG_WRITE1(sc, VGA_GC_DATA, 0xff); 485} 486 487static void 488vga_initialize(struct vt_device *vd, int textmode) 489{ 490 struct vga_softc *sc = vd->vd_softc; 491 uint8_t x; 492 493 /* Make sure the VGA adapter is not in monochrome emulation mode. */ 494 x = REG_READ1(sc, VGA_GEN_MISC_OUTPUT_R); 495 REG_WRITE1(sc, VGA_GEN_MISC_OUTPUT_W, x | VGA_GEN_MO_IOA); 496 497 /* Unprotect CRTC registers 0-7. */ 498 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_VERT_RETRACE_END); 499 x = REG_READ1(sc, VGA_CRTC_DATA); 500 REG_WRITE1(sc, VGA_CRTC_DATA, x & ~VGA_CRTC_VRE_PR); 501 502 /* 503 * Wait for the vertical retrace. 504 * NOTE: this code reads the VGA_GEN_INPUT_STAT_1 register, which has 505 * the side-effect of clearing the internal flip-flip of the attribute 506 * controller's write register. This means that because this code is 507 * here, we know for sure that the first write to the attribute 508 * controller will be a write to the address register. Removing this 509 * code therefore also removes that guarantee and appropriate measures 510 * need to be taken. 511 */ 512 do { 513 x = REG_READ1(sc, VGA_GEN_INPUT_STAT_1); 514 x &= VGA_GEN_IS1_VR | VGA_GEN_IS1_DE; 515 } while (x != (VGA_GEN_IS1_VR | VGA_GEN_IS1_DE)); 516 517 /* Now, disable the sync. signals. */ 518 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MODE_CONTROL); 519 x = REG_READ1(sc, VGA_CRTC_DATA); 520 REG_WRITE1(sc, VGA_CRTC_DATA, x & ~VGA_CRTC_MC_HR); 521 522 /* Asynchronous sequencer reset. */ 523 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_RESET); 524 REG_WRITE1(sc, VGA_SEQ_DATA, VGA_SEQ_RST_SR); 525 526 if (!textmode) 527 vga_initialize_graphics(vd); 528 529 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_PRESET_ROW_SCAN); 530 REG_WRITE1(sc, VGA_CRTC_DATA, 0); 531 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_CURSOR_START); 532 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_CS_COO); 533 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_CURSOR_END); 534 REG_WRITE1(sc, VGA_CRTC_DATA, 0); 535 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_START_ADDR_HIGH); 536 REG_WRITE1(sc, VGA_CRTC_DATA, 0); 537 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_START_ADDR_LOW); 538 REG_WRITE1(sc, VGA_CRTC_DATA, 0); 539 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_CURSOR_LOC_HIGH); 540 REG_WRITE1(sc, VGA_CRTC_DATA, 0); 541 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_CURSOR_LOC_LOW); 542 REG_WRITE1(sc, VGA_CRTC_DATA, 0x59); 543 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_UNDERLINE_LOC); 544 REG_WRITE1(sc, VGA_CRTC_DATA, VGA_CRTC_UL_UL); 545 546 if (textmode) { 547 /* Set the attribute controller to blink disable. */ 548 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_MODE_CONTROL); 549 REG_WRITE1(sc, VGA_AC_WRITE, 0); 550 } else { 551 /* Set the attribute controller in graphics mode. */ 552 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_MODE_CONTROL); 553 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_MC_GA); 554 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_HORIZ_PIXEL_PANNING); 555 REG_WRITE1(sc, VGA_AC_WRITE, 0); 556 } 557 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(0)); 558 REG_WRITE1(sc, VGA_AC_WRITE, 0); 559 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(1)); 560 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_R); 561 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(2)); 562 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_G); 563 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(3)); 564 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SG | VGA_AC_PAL_R); 565 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(4)); 566 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_B); 567 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(5)); 568 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_R | VGA_AC_PAL_B); 569 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(6)); 570 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_G | VGA_AC_PAL_B); 571 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(7)); 572 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_R | VGA_AC_PAL_G | VGA_AC_PAL_B); 573 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(8)); 574 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 575 VGA_AC_PAL_SB); 576 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(9)); 577 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 578 VGA_AC_PAL_SB | VGA_AC_PAL_R); 579 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(10)); 580 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 581 VGA_AC_PAL_SB | VGA_AC_PAL_G); 582 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(11)); 583 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 584 VGA_AC_PAL_SB | VGA_AC_PAL_R | VGA_AC_PAL_G); 585 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(12)); 586 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 587 VGA_AC_PAL_SB | VGA_AC_PAL_B); 588 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(13)); 589 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 590 VGA_AC_PAL_SB | VGA_AC_PAL_R | VGA_AC_PAL_B); 591 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(14)); 592 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 593 VGA_AC_PAL_SB | VGA_AC_PAL_G | VGA_AC_PAL_B); 594 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PALETTE(15)); 595 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_PAL_SR | VGA_AC_PAL_SG | 596 VGA_AC_PAL_SB | VGA_AC_PAL_R | VGA_AC_PAL_G | VGA_AC_PAL_B); 597 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_OVERSCAN_COLOR); 598 REG_WRITE1(sc, VGA_AC_WRITE, 0); 599 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_COLOR_PLANE_ENABLE); 600 REG_WRITE1(sc, VGA_AC_WRITE, 0x0f); 601 REG_WRITE1(sc, VGA_AC_WRITE, VGA_AC_COLOR_SELECT); 602 REG_WRITE1(sc, VGA_AC_WRITE, 0); 603 604 if (!textmode) { 605 u_int ofs; 606 607 /* 608 * Done. Clear the frame buffer. All bit planes are 609 * enabled, so a single-paged loop should clear all 610 * planes. 611 */ 612 for (ofs = 0; ofs < VT_VGA_MEMSIZE; ofs++) { 613 MEM_READ1(sc, ofs); 614 MEM_WRITE1(sc, ofs, 0); 615 } 616 } 617 618 /* Re-enable the sequencer. */ 619 REG_WRITE1(sc, VGA_SEQ_ADDRESS, VGA_SEQ_RESET); 620 REG_WRITE1(sc, VGA_SEQ_DATA, VGA_SEQ_RST_SR | VGA_SEQ_RST_NAR); 621 /* Re-enable the sync signals. */ 622 REG_WRITE1(sc, VGA_CRTC_ADDRESS, VGA_CRTC_MODE_CONTROL); 623 x = REG_READ1(sc, VGA_CRTC_DATA); 624 REG_WRITE1(sc, VGA_CRTC_DATA, x | VGA_CRTC_MC_HR); 625 626 if (!textmode) { 627 /* Switch to write mode 3, because we'll mainly do bitblt. */ 628 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_MODE); 629 REG_WRITE1(sc, VGA_GC_DATA, 3); 630 REG_WRITE1(sc, VGA_GC_ADDRESS, VGA_GC_ENABLE_SET_RESET); 631 REG_WRITE1(sc, VGA_GC_DATA, 0x0f); 632 } 633} 634 635static int 636vga_init(struct vt_device *vd) 637{ 638 struct vga_softc *sc = vd->vd_softc; 639 int textmode = 0; 640 641#if defined(__amd64__) || defined(__i386__) 642 /* Disable if EFI framebuffer present. Should be handled by priority 643 * logic in vt(9), but this will do for now. XXX */ 644 645 caddr_t kmdp, efifb; 646 kmdp = preload_search_by_type("elf kernel"); 647 if (kmdp == NULL) 648 kmdp = preload_search_by_type("elf64 kernel"); 649 efifb = preload_search_info(kmdp, MODINFO_METADATA | MODINFOMD_EFI_FB); 650 if (efifb != NULL) 651 return (CN_DEAD); 652#endif 653 654#if defined(__amd64__) || defined(__i386__) 655 sc->vga_fb_tag = X86_BUS_SPACE_MEM; 656 sc->vga_fb_handle = KERNBASE + VGA_MEM_BASE; 657 sc->vga_reg_tag = X86_BUS_SPACE_IO; 658 sc->vga_reg_handle = VGA_REG_BASE; 659#elif defined(__ia64__) 660 sc->vga_fb_tag = IA64_BUS_SPACE_MEM; 661 sc->vga_fb_handle = IA64_PHYS_TO_RR6(VGA_MEM_BASE); 662 sc->vga_reg_tag = IA64_BUS_SPACE_IO; 663 sc->vga_reg_handle = VGA_REG_BASE; 664#else 665# error "Architecture not yet supported!" 666#endif 667 668 TUNABLE_INT_FETCH("hw.vga.textmode", &textmode); 669 if (textmode) { 670 vd->vd_flags |= VDF_TEXTMODE; 671 vd->vd_width = 80; 672 vd->vd_height = 25; 673 } else { 674 vd->vd_width = VT_VGA_WIDTH; 675 vd->vd_height = VT_VGA_HEIGHT; 676 } 677 vga_initialize(vd, textmode); 678 679 return (CN_INTERNAL); 680} 681 682static void 683vga_postswitch(struct vt_device *vd) 684{ 685 686 /* Reinit VGA mode, to restore view after app which change mode. */ 687 vga_initialize(vd, (vd->vd_flags & VDF_TEXTMODE)); 688 /* Ask vt(9) to update chars on visible area. */ 689 vd->vd_flags |= VDF_INVALID; 690} 691