ega.c revision 1.25
1 /* $NetBSD: ega.c,v 1.25 2009/03/14 15:36:18 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1999 5 * Matthias Drochner. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: ega.c,v 1.25 2009/03/14 15:36:18 dsl Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/callout.h> 35 #include <sys/kernel.h> 36 #include <sys/device.h> 37 #include <sys/malloc.h> 38 #include <sys/bus.h> 39 40 #include <dev/isa/isavar.h> 41 42 #include <dev/ic/mc6845reg.h> 43 #include <dev/ic/pcdisplayvar.h> 44 #include <dev/ic/vgareg.h> 45 #include <dev/ic/vgavar.h> 46 #include <dev/isa/egavar.h> 47 48 #include <dev/ic/pcdisplay.h> 49 50 #include <dev/wscons/wsconsio.h> 51 #include <dev/wscons/wsdisplayvar.h> 52 53 static struct egafont { 54 char name[16]; 55 int height; 56 int encoding; 57 int slot; 58 } ega_builtinfont = { 59 "builtin", 60 14, 61 WSDISPLAY_FONTENC_IBM, 62 0 63 }; 64 65 struct egascreen { 66 struct pcdisplayscreen pcs; 67 LIST_ENTRY(egascreen) next; 68 struct ega_config *cfg; 69 struct egafont *fontset1, *fontset2; 70 71 int mindispoffset, maxdispoffset; 72 }; 73 74 struct ega_config { 75 struct vga_handle hdl; 76 77 int nscreens; 78 LIST_HEAD(, egascreen) screens; 79 struct egascreen *active; /* current display */ 80 const struct wsscreen_descr *currenttype; 81 int currentfontset1, currentfontset2; 82 83 struct egafont *vc_fonts[4]; 84 85 struct egascreen *wantedscreen; 86 void (*switchcb)(void *, int, int); 87 void *switchcbarg; 88 89 callout_t switch_callout; 90 }; 91 92 struct ega_softc { 93 struct device sc_dev; 94 struct ega_config *sc_dc; 95 int nscreens; 96 }; 97 98 static int egaconsole, ega_console_attached; 99 static struct egascreen ega_console_screen; 100 static struct ega_config ega_console_dc; 101 102 int ega_match(struct device *, struct cfdata *, void *); 103 void ega_attach(struct device *, struct device *, void *); 104 105 static int ega_is_console(bus_space_tag_t); 106 static int ega_probe_col(bus_space_tag_t, bus_space_tag_t); 107 static int ega_probe_mono(bus_space_tag_t, bus_space_tag_t); 108 int ega_selectfont(struct ega_config *, struct egascreen *, char *, char *); 109 void ega_init_screen(struct ega_config *, struct egascreen *, 110 const struct wsscreen_descr *, int, long *); 111 static void ega_init(struct ega_config *, bus_space_tag_t, bus_space_tag_t, 112 int); 113 static void ega_setfont(struct ega_config *, struct egascreen *); 114 static int ega_allocattr(void *, int, int, int, long *); 115 void ega_copyrows(void *, int, int, int); 116 117 CFATTACH_DECL(ega, sizeof(struct ega_softc), 118 ega_match, ega_attach, NULL, NULL); 119 120 const struct wsdisplay_emulops ega_emulops = { 121 pcdisplay_cursor, 122 pcdisplay_mapchar, 123 pcdisplay_putchar, 124 pcdisplay_copycols, 125 pcdisplay_erasecols, 126 ega_copyrows, 127 pcdisplay_eraserows, 128 ega_allocattr 129 }; 130 131 /* 132 * translate WS(=ANSI) color codes to standard pc ones 133 */ 134 static unsigned char fgansitopc[] = { 135 FG_BLACK, FG_RED, FG_GREEN, FG_BROWN, FG_BLUE, 136 FG_MAGENTA, FG_CYAN, FG_LIGHTGREY 137 }, bgansitopc[] = { 138 BG_BLACK, BG_RED, BG_GREEN, BG_BROWN, BG_BLUE, 139 BG_MAGENTA, BG_CYAN, BG_LIGHTGREY 140 }; 141 142 const struct wsscreen_descr ega_stdscreen = { 143 "80x25", 80, 25, 144 &ega_emulops, 145 8, 14, 146 WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK 147 }, ega_stdscreen_mono = { 148 "80x25", 80, 25, 149 &ega_emulops, 150 8, 14, 151 WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE 152 }, ega_stdscreen_bf = { 153 "80x25bf", 80, 25, 154 &ega_emulops, 155 8, 14, 156 WSSCREEN_WSCOLORS | WSSCREEN_BLINK 157 }, ega_35lscreen = { 158 "80x35", 80, 35, 159 &ega_emulops, 160 8, 10, 161 WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK 162 }, ega_35lscreen_mono = { 163 "80x35", 80, 35, 164 &ega_emulops, 165 8, 10, 166 WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE 167 }, ega_35lscreen_bf = { 168 "80x35bf", 80, 35, 169 &ega_emulops, 170 8, 10, 171 WSSCREEN_WSCOLORS | WSSCREEN_BLINK 172 }, ega_43lscreen = { 173 "80x43", 80, 43, 174 &ega_emulops, 175 8, 8, 176 WSSCREEN_WSCOLORS | WSSCREEN_HILIT | WSSCREEN_BLINK 177 }, ega_43lscreen_mono = { 178 "80x43", 80, 43, 179 &ega_emulops, 180 8, 8, 181 WSSCREEN_HILIT | WSSCREEN_UNDERLINE | WSSCREEN_BLINK | WSSCREEN_REVERSE 182 }, ega_43lscreen_bf = { 183 "80x43bf", 80, 43, 184 &ega_emulops, 185 8, 8, 186 WSSCREEN_WSCOLORS | WSSCREEN_BLINK 187 }; 188 189 #define VGA_SCREEN_CANTWOFONTS(type) (!((type)->capabilities & WSSCREEN_HILIT)) 190 191 const struct wsscreen_descr *_ega_scrlist[] = { 192 &ega_stdscreen, 193 &ega_stdscreen_bf, 194 &ega_35lscreen, 195 &ega_35lscreen_bf, 196 &ega_43lscreen, 197 &ega_43lscreen_bf, 198 }, *_ega_scrlist_mono[] = { 199 &ega_stdscreen_mono, 200 &ega_35lscreen_mono, 201 &ega_43lscreen_mono, 202 }; 203 204 205 const struct wsscreen_list ega_screenlist = { 206 sizeof(_ega_scrlist) / sizeof(struct wsscreen_descr *), 207 _ega_scrlist 208 }, ega_screenlist_mono = { 209 sizeof(_ega_scrlist_mono) / sizeof(struct wsscreen_descr *), 210 _ega_scrlist_mono 211 }; 212 213 static int ega_ioctl(void *, void *, u_long, void *, int, struct proc *); 214 static paddr_t ega_mmap(void *, void *, off_t, int); 215 static int ega_alloc_screen(void *, const struct wsscreen_descr *, 216 void **, int *, int *, long *); 217 static void ega_free_screen(void *, void *); 218 static int ega_show_screen(void *, void *, int, 219 void (*) (void *, int, int), void *); 220 static int ega_load_font(void *, void *, struct wsdisplay_font *); 221 222 void ega_doswitch(struct ega_config *); 223 224 const struct wsdisplay_accessops ega_accessops = { 225 ega_ioctl, 226 ega_mmap, 227 ega_alloc_screen, 228 ega_free_screen, 229 ega_show_screen, 230 ega_load_font 231 }; 232 233 static int 234 ega_probe_col(iot, memt) 235 bus_space_tag_t iot, memt; 236 { 237 bus_space_handle_t memh, ioh_6845; 238 u_int16_t oldval, val; 239 240 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 241 return (0); 242 oldval = bus_space_read_2(memt, memh, 0); 243 bus_space_write_2(memt, memh, 0, 0xa55a); 244 val = bus_space_read_2(memt, memh, 0); 245 bus_space_write_2(memt, memh, 0, oldval); 246 bus_space_unmap(memt, memh, 0x8000); 247 if (val != 0xa55a) 248 return (0); 249 250 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 251 return (0); 252 bus_space_unmap(iot, ioh_6845, 0x10); 253 254 return (1); 255 } 256 257 static int 258 ega_probe_mono(iot, memt) 259 bus_space_tag_t iot, memt; 260 { 261 bus_space_handle_t memh, ioh_6845; 262 u_int16_t oldval, val; 263 264 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 265 return (0); 266 oldval = bus_space_read_2(memt, memh, 0); 267 bus_space_write_2(memt, memh, 0, 0xa55a); 268 val = bus_space_read_2(memt, memh, 0); 269 bus_space_write_2(memt, memh, 0, oldval); 270 bus_space_unmap(memt, memh, 0x8000); 271 if (val != 0xa55a) 272 return (0); 273 274 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 275 return (0); 276 bus_space_unmap(iot, ioh_6845, 0x10); 277 278 return (1); 279 } 280 /* 281 * We want at least ASCII 32..127 be present in the 282 * first font slot. 283 */ 284 #define vga_valid_primary_font(f) \ 285 (f->encoding == WSDISPLAY_FONTENC_IBM || \ 286 f->encoding == WSDISPLAY_FONTENC_ISO) 287 288 int 289 ega_selectfont(vc, scr, name1, name2) 290 struct ega_config *vc; 291 struct egascreen *scr; 292 char *name1, *name2; /* NULL: take first found */ 293 { 294 const struct wsscreen_descr *type = scr->pcs.type; 295 struct egafont *f1, *f2; 296 int i; 297 298 f1 = f2 = 0; 299 300 for (i = 0; i < 4; i++) { 301 struct egafont *f = vc->vc_fonts[i]; 302 if (!f || f->height != type->fontheight) 303 continue; 304 if (!f1 && 305 vga_valid_primary_font(f) && 306 (!name1 || !strcmp(name1, f->name))) { 307 f1 = f; 308 continue; 309 } 310 if (!f2 && 311 VGA_SCREEN_CANTWOFONTS(type) && 312 (!name2 || !strcmp(name2, f->name))) { 313 f2 = f; 314 continue; 315 } 316 } 317 318 /* 319 * The request fails if no primary font was found, 320 * or if a second font was requested but not found. 321 */ 322 if (f1 && (!name2 || f2)) { 323 #ifdef EGAFONTDEBUG 324 if (scr != &ega_console_screen || ega_console_attached) { 325 printf("ega (%s): font1=%s (slot %d)", type->name, 326 f1->name, f1->slot); 327 if (f2) 328 printf(", font2=%s (slot %d)", 329 f2->name, f2->slot); 330 printf("\n"); 331 } 332 #endif 333 scr->fontset1 = f1; 334 scr->fontset2 = f2; 335 return (0); 336 } 337 return (ENXIO); 338 } 339 340 void 341 ega_init_screen(struct ega_config *vc, struct egascreen *scr, const struct wsscreen_descr *type, int existing, long *attrp) 342 { 343 int cpos; 344 int res; 345 346 scr->cfg = vc; 347 scr->pcs.hdl = (struct pcdisplay_handle *)&vc->hdl; 348 scr->pcs.type = type; 349 scr->pcs.active = 0; 350 scr->mindispoffset = 0; 351 scr->maxdispoffset = 0x8000 - type->nrows * type->ncols * 2; 352 353 if (existing) { 354 cpos = vga_6845_read(&vc->hdl, cursorh) << 8; 355 cpos |= vga_6845_read(&vc->hdl, cursorl); 356 357 /* make sure we have a valid cursor position */ 358 if (cpos < 0 || cpos >= type->nrows * type->ncols) 359 cpos = 0; 360 361 scr->pcs.dispoffset = vga_6845_read(&vc->hdl, startadrh) << 9; 362 scr->pcs.dispoffset |= vga_6845_read(&vc->hdl, startadrl) << 1; 363 364 /* make sure we have a valid memory offset */ 365 if (scr->pcs.dispoffset < scr->mindispoffset || 366 scr->pcs.dispoffset > scr->maxdispoffset) 367 scr->pcs.dispoffset = scr->mindispoffset; 368 } else { 369 cpos = 0; 370 scr->pcs.dispoffset = scr->mindispoffset; 371 } 372 373 scr->pcs.cursorrow = cpos / type->ncols; 374 scr->pcs.cursorcol = cpos % type->ncols; 375 pcdisplay_cursor_init(&scr->pcs, existing); 376 377 res = ega_allocattr(scr, 0, 0, 0, attrp); 378 #ifdef DIAGNOSTIC 379 if (res) 380 panic("ega_init_screen: attribute botch"); 381 #endif 382 383 scr->pcs.mem = NULL; 384 385 scr->fontset1 = scr->fontset2 = 0; 386 if (ega_selectfont(vc, scr, 0, 0)) { 387 if (scr == &ega_console_screen) 388 panic("ega_init_screen: no font"); 389 else 390 printf("ega_init_screen: no font\n"); 391 } 392 393 vc->nscreens++; 394 LIST_INSERT_HEAD(&vc->screens, scr, next); 395 } 396 397 static void 398 ega_init(vc, iot, memt, mono) 399 struct ega_config *vc; 400 bus_space_tag_t iot, memt; 401 int mono; 402 { 403 struct vga_handle *vh = &vc->hdl; 404 int i; 405 406 vh->vh_iot = iot; 407 vh->vh_memt = memt; 408 vh->vh_mono = mono; 409 410 if (bus_space_map(vh->vh_iot, 0x3c0, 0x10, 0, &vh->vh_ioh_vga)) 411 panic("ega_common_setup: couldn't map ega io"); 412 413 if (bus_space_map(vh->vh_iot, (vh->vh_mono ? 0x3b0 : 0x3d0), 0x10, 0, 414 &vh->vh_ioh_6845)) 415 panic("ega_common_setup: couldn't map 6845 io"); 416 417 if (bus_space_map(vh->vh_memt, 0xa0000, 0x20000, 0, &vh->vh_allmemh)) 418 panic("ega_common_setup: couldn't map memory"); 419 420 if (bus_space_subregion(vh->vh_memt, vh->vh_allmemh, 421 (vh->vh_mono ? 0x10000 : 0x18000), 0x8000, 422 &vh->vh_memh)) 423 panic("ega_common_setup: mem subrange failed"); 424 425 vc->nscreens = 0; 426 LIST_INIT(&vc->screens); 427 vc->active = NULL; 428 vc->currenttype = vh->vh_mono ? &ega_stdscreen_mono : &ega_stdscreen; 429 callout_init(&vc->switch_callout, 0); 430 431 vc->vc_fonts[0] = &ega_builtinfont; 432 for (i = 1; i < 4; i++) 433 vc->vc_fonts[i] = 0; 434 435 vc->currentfontset1 = vc->currentfontset2 = 0; 436 } 437 438 int 439 ega_match(struct device *parent, struct cfdata *match, void *aux) 440 { 441 struct isa_attach_args *ia = aux; 442 int mono; 443 444 if (ia->ia_nio < 1) 445 return (0); 446 447 if (ia->ia_iomem < 1) 448 return (0); 449 450 if (ia->ia_nirq < 1) 451 return (0); 452 453 if (ia->ia_ndrq < 1) 454 return (0); 455 456 if (ISA_DIRECT_CONFIG(ia)) 457 return (0); 458 459 /* If values are hardwired to something that they can't be, punt. */ 460 if ((ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 461 ia->ia_io[0].ir_addr != 0x3d0 && 462 ia->ia_io[0].ir_addr != 0x3b0) || 463 /* ia->ia_io[0].ir_size != 0 || XXX isa.c */ 464 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM && 465 ia->ia_iomem[0].ir_addr != 0xb8000 && 466 ia->ia_iomem[0].ir_addr != 0xb0000) || 467 (ia->ia_iomem[0].ir_size != 0 && 468 ia->ia_iomem[0].ir_size != 0x8000) || 469 ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ || 470 ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ) 471 return (0); 472 473 if (ega_is_console(ia->ia_iot)) 474 mono = ega_console_dc.hdl.vh_mono; 475 else if (ia->ia_io[0].ir_addr != 0x3b0 && 476 ia->ia_iomem[0].ir_addr != 0xb0000 && 477 ega_probe_col(ia->ia_iot, ia->ia_memt)) 478 mono = 0; 479 else if (ia->ia_io[0].ir_addr != 0x3d0 && 480 ia->ia_iomem[0].ir_addr != 0xb8000 && 481 ega_probe_mono(ia->ia_iot, ia->ia_memt)) 482 mono = 1; 483 else 484 return (0); 485 486 ia->ia_io[0].ir_addr = mono ? 0x3b0 : 0x3d0; 487 ia->ia_io[0].ir_size = 0x10; 488 ia->ia_iomem[0].ir_addr = mono ? 0xb0000 : 0xb8000; 489 ia->ia_iomem[0].ir_size = 0x8000; 490 return (2); /* beat pcdisplay */ 491 } 492 493 void 494 ega_attach(parent, self, aux) 495 struct device *parent, *self; 496 void *aux; 497 { 498 struct isa_attach_args *ia = aux; 499 struct ega_softc *sc = (struct ega_softc *)self; 500 int console; 501 struct ega_config *dc; 502 struct wsemuldisplaydev_attach_args aa; 503 504 printf("\n"); 505 506 console = ega_is_console(ia->ia_iot); 507 508 if (console) { 509 dc = &ega_console_dc; 510 sc->nscreens = 1; 511 ega_console_attached = 1; 512 } else { 513 dc = malloc(sizeof(struct ega_config), 514 M_DEVBUF, M_WAITOK); 515 if (ia->ia_io[0].ir_addr != 0x3b0 && 516 ia->ia_iomem[0].ir_addr != 0xb0000 && 517 ega_probe_col(ia->ia_iot, ia->ia_memt)) 518 ega_init(dc, ia->ia_iot, ia->ia_memt, 0); 519 else if (ia->ia_io[0].ir_addr != 0x3d0 && 520 ia->ia_iomem[0].ir_addr != 0xb8000 && 521 ega_probe_mono(ia->ia_iot, ia->ia_memt)) 522 ega_init(dc, ia->ia_iot, ia->ia_memt, 1); 523 else 524 panic("ega_attach: display disappeared"); 525 } 526 sc->sc_dc = dc; 527 528 aa.console = console; 529 aa.scrdata = &ega_screenlist; 530 aa.accessops = &ega_accessops; 531 aa.accesscookie = dc; 532 533 config_found(self, &aa, wsemuldisplaydevprint); 534 } 535 536 537 int 538 ega_cnattach(iot, memt) 539 bus_space_tag_t iot, memt; 540 { 541 int mono; 542 long defattr; 543 const struct wsscreen_descr *scr; 544 545 if (ega_probe_col(iot, memt)) 546 mono = 0; 547 else if (ega_probe_mono(iot, memt)) 548 mono = 1; 549 else 550 return (ENXIO); 551 552 ega_init(&ega_console_dc, iot, memt, mono); 553 scr = ega_console_dc.currenttype; 554 ega_init_screen(&ega_console_dc, &ega_console_screen, scr, 1, &defattr); 555 556 ega_console_screen.pcs.active = 1; 557 ega_console_dc.active = &ega_console_screen; 558 559 wsdisplay_cnattach(scr, &ega_console_screen, 560 ega_console_screen.pcs.cursorcol, 561 ega_console_screen.pcs.cursorrow, 562 defattr); 563 564 egaconsole = 1; 565 return (0); 566 } 567 568 static int 569 ega_is_console(bus_space_tag_t iot) 570 { 571 if (egaconsole && 572 !ega_console_attached && 573 iot == ega_console_dc.hdl.vh_iot) 574 return (1); 575 return (0); 576 } 577 578 static int 579 ega_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct proc *p) 580 { 581 /* 582 * XXX "do something!" 583 */ 584 return (EPASSTHROUGH); 585 } 586 587 static paddr_t 588 ega_mmap(void *v, void *vs, off_t offset, int prot) 589 { 590 return (-1); 591 } 592 593 static int 594 ega_alloc_screen(v, type, cookiep, curxp, curyp, defattrp) 595 void *v; 596 const struct wsscreen_descr *type; 597 void **cookiep; 598 int *curxp, *curyp; 599 long *defattrp; 600 { 601 struct ega_config *vc = v; 602 struct egascreen *scr; 603 604 if (vc->nscreens == 1) { 605 /* 606 * When allocating the second screen, get backing store 607 * for the first one too. 608 * XXX We could be more clever and use video RAM. 609 */ 610 vc->screens.lh_first->pcs.mem = 611 malloc(type->ncols * type->nrows * 2, M_DEVBUF, M_WAITOK); 612 } 613 614 scr = malloc(sizeof(struct egascreen), M_DEVBUF, M_WAITOK); 615 ega_init_screen(vc, scr, type, vc->nscreens == 0, defattrp); 616 617 if (vc->nscreens == 1) { 618 scr->pcs.active = 1; 619 vc->active = scr; 620 vc->currenttype = type; 621 } else { 622 scr->pcs.mem = malloc(type->ncols * type->nrows * 2, 623 M_DEVBUF, M_WAITOK); 624 pcdisplay_eraserows(&scr->pcs, 0, type->nrows, *defattrp); 625 } 626 627 *cookiep = scr; 628 *curxp = scr->pcs.cursorcol; 629 *curyp = scr->pcs.cursorrow; 630 return (0); 631 } 632 633 static void 634 ega_free_screen(void *v, void *cookie) 635 { 636 struct egascreen *vs = cookie; 637 struct ega_config *vc = vs->cfg; 638 639 LIST_REMOVE(vs, next); 640 if (vs != &ega_console_screen) 641 free(vs, M_DEVBUF); 642 else 643 panic("ega_free_screen: console"); 644 645 if (vc->active == vs) 646 vc->active = 0; 647 } 648 649 static void 650 ega_setfont(struct ega_config *vc, struct egascreen *scr) 651 { 652 int fontslot1, fontslot2; 653 654 fontslot1 = (scr->fontset1 ? scr->fontset1->slot : 0); 655 fontslot2 = (scr->fontset2 ? scr->fontset2->slot : fontslot1); 656 if (vc->currentfontset1 != fontslot1 || 657 vc->currentfontset2 != fontslot2) { 658 vga_setfontset(&vc->hdl, 2 * fontslot1, 2 * fontslot2); 659 vc->currentfontset1 = fontslot1; 660 vc->currentfontset2 = fontslot2; 661 } 662 } 663 664 static int 665 ega_show_screen(v, cookie, waitok, cb, cbarg) 666 void *v; 667 void *cookie; 668 int waitok; 669 void (*cb)(void *, int, int); 670 void *cbarg; 671 { 672 struct egascreen *scr = cookie, *oldscr; 673 struct ega_config *vc = scr->cfg; 674 675 oldscr = vc->active; /* can be NULL! */ 676 if (scr == oldscr) { 677 return (0); 678 } 679 680 vc->wantedscreen = cookie; 681 vc->switchcb = cb; 682 vc->switchcbarg = cbarg; 683 if (cb) { 684 callout_reset(&vc->switch_callout, 0, 685 (void(*)(void *))ega_doswitch); 686 return (EAGAIN); 687 } 688 689 ega_doswitch(vc); 690 return (0); 691 } 692 693 void 694 ega_doswitch(struct ega_config *vc) 695 { 696 struct egascreen *scr, *oldscr; 697 struct vga_handle *vh = &vc->hdl; 698 const struct wsscreen_descr *type; 699 700 scr = vc->wantedscreen; 701 if (!scr) { 702 printf("ega_doswitch: disappeared\n"); 703 (*vc->switchcb)(vc->switchcbarg, EIO, 0); 704 return; 705 } 706 type = scr->pcs.type; 707 oldscr = vc->active; /* can be NULL! */ 708 #ifdef DIAGNOSTIC 709 if (oldscr) { 710 if (!oldscr->pcs.active) 711 panic("ega_show_screen: not active"); 712 if (oldscr->pcs.type != vc->currenttype) 713 panic("ega_show_screen: bad type"); 714 } 715 #endif 716 if (scr == oldscr) { 717 return; 718 } 719 #ifdef DIAGNOSTIC 720 if (scr->pcs.active) 721 panic("ega_show_screen: active"); 722 #endif 723 724 if (oldscr) { 725 const struct wsscreen_descr *oldtype = oldscr->pcs.type; 726 727 oldscr->pcs.active = 0; 728 bus_space_read_region_2(vh->vh_memt, vh->vh_memh, 729 oldscr->pcs.dispoffset, oldscr->pcs.mem, 730 oldtype->ncols * oldtype->nrows); 731 } 732 733 if (vc->currenttype != type) { 734 vga_setscreentype(vh, type); 735 vc->currenttype = type; 736 } 737 738 ega_setfont(vc, scr); 739 /* XXX swich colours! */ 740 741 scr->pcs.dispoffset = scr->mindispoffset; 742 if (!oldscr || (scr->pcs.dispoffset != oldscr->pcs.dispoffset)) { 743 vga_6845_write(vh, startadrh, scr->pcs.dispoffset >> 9); 744 vga_6845_write(vh, startadrl, scr->pcs.dispoffset >> 1); 745 } 746 747 bus_space_write_region_2(vh->vh_memt, vh->vh_memh, 748 scr->pcs.dispoffset, scr->pcs.mem, 749 type->ncols * type->nrows); 750 scr->pcs.active = 1; 751 752 vc->active = scr; 753 754 pcdisplay_cursor(&scr->pcs, scr->pcs.cursoron, 755 scr->pcs.cursorrow, scr->pcs.cursorcol); 756 757 vc->wantedscreen = 0; 758 if (vc->switchcb) 759 (*vc->switchcb)(vc->switchcbarg, 0, 0); 760 } 761 762 static int 763 ega_load_font(void *v, void *cookie, struct wsdisplay_font *data) 764 { 765 struct ega_config *vc = v; 766 struct egascreen *scr = cookie; 767 char *name2; 768 int res, slot; 769 struct egafont *f; 770 771 if (scr) { 772 name2 = strchr(data->name, ','); 773 if (name2) 774 *name2++ = '\0'; 775 res = ega_selectfont(vc, scr, data->name, name2); 776 if (!res) 777 ega_setfont(vc, scr); 778 return (res); 779 } 780 781 if (data->fontwidth != 8 || data->stride != 1) 782 return (EINVAL); /* XXX 1 byte per line */ 783 if (data->firstchar != 0 || data->numchars != 256) 784 return (EINVAL); 785 #ifndef WSCONS_SUPPORT_PCVTFONTS 786 if (data->encoding == WSDISPLAY_FONTENC_PCVT) { 787 printf("vga: pcvt font support not built in, see vga(4)\n"); 788 return (EINVAL); 789 } 790 #endif 791 792 for (slot = 0; slot < 4; slot++) 793 if (!vc->vc_fonts[slot]) 794 break; 795 if (slot == 4) 796 return (ENOSPC); 797 798 f = malloc(sizeof(struct egafont), M_DEVBUF, M_WAITOK); 799 strncpy(f->name, data->name, sizeof(f->name)); 800 f->height = data->fontheight; 801 f->encoding = data->encoding; 802 #ifdef notyet 803 f->firstchar = data->firstchar; 804 f->numchars = data->numchars; 805 #endif 806 #ifdef EGAFONTDEBUG 807 printf("ega: load %s (8x%d, enc %d) font to slot %d\n", f->name, 808 f->height, f->encoding, slot); 809 #endif 810 vga_loadchars(&vc->hdl, 2 * slot, 0, 256, f->height, data->data); 811 f->slot = slot; 812 vc->vc_fonts[slot] = f; 813 814 return (0); 815 } 816 817 static int 818 ega_allocattr(id, fg, bg, flags, attrp) 819 void *id; 820 int fg, bg; 821 int flags; 822 long *attrp; 823 { 824 struct egascreen *scr = id; 825 struct ega_config *vc = scr->cfg; 826 827 if (__predict_false((unsigned int)fg >= sizeof(fgansitopc) || 828 (unsigned int)bg >= sizeof(bgansitopc))) 829 return (EINVAL); 830 831 if (vc->hdl.vh_mono) { 832 if (flags & WSATTR_WSCOLORS) 833 return (EINVAL); 834 if (flags & WSATTR_REVERSE) 835 *attrp = 0x70; 836 else 837 *attrp = 0x07; 838 if (flags & WSATTR_UNDERLINE) 839 *attrp |= FG_UNDERLINE; 840 if (flags & WSATTR_HILIT) 841 *attrp |= FG_INTENSE; 842 } else { 843 if (flags & (WSATTR_UNDERLINE | WSATTR_REVERSE)) 844 return (EINVAL); 845 if (flags & WSATTR_WSCOLORS) 846 *attrp = fgansitopc[fg] | bgansitopc[bg]; 847 else 848 *attrp = 7; 849 if (flags & WSATTR_HILIT) 850 *attrp += 8; 851 } 852 if (flags & WSATTR_BLINK) 853 *attrp |= FG_BLINK; 854 return (0); 855 } 856 857 void 858 ega_copyrows(id, srcrow, dstrow, nrows) 859 void *id; 860 int srcrow, dstrow, nrows; 861 { 862 struct egascreen *scr = id; 863 bus_space_tag_t memt = scr->pcs.hdl->ph_memt; 864 bus_space_handle_t memh = scr->pcs.hdl->ph_memh; 865 int ncols = scr->pcs.type->ncols; 866 bus_size_t srcoff, dstoff; 867 868 srcoff = srcrow * ncols + 0; 869 dstoff = dstrow * ncols + 0; 870 871 if (scr->pcs.active) { 872 if (dstrow == 0 && (srcrow + nrows == scr->pcs.type->nrows)) { 873 #ifdef PCDISPLAY_SOFTCURSOR 874 int cursoron = scr->pcs.cursoron; 875 876 if (cursoron) 877 pcdisplay_cursor(&scr->pcs, 0, 878 scr->pcs.cursorrow, scr->pcs.cursorcol); 879 #endif 880 /* scroll up whole screen */ 881 if ((scr->pcs.dispoffset + srcrow * ncols * 2) 882 <= scr->maxdispoffset) { 883 scr->pcs.dispoffset += srcrow * ncols * 2; 884 } else { 885 bus_space_copy_region_2(memt, memh, 886 scr->pcs.dispoffset + srcoff * 2, 887 memh, scr->mindispoffset, 888 nrows * ncols); 889 scr->pcs.dispoffset = scr->mindispoffset; 890 } 891 vga_6845_write(&scr->cfg->hdl, startadrh, 892 scr->pcs.dispoffset >> 9); 893 vga_6845_write(&scr->cfg->hdl, startadrl, 894 scr->pcs.dispoffset >> 1); 895 #ifdef PCDISPLAY_SOFTCURSOR 896 if (cursoron) 897 pcdisplay_cursor(&scr->pcs, 1, 898 scr->pcs.cursorrow, scr->pcs.cursorcol); 899 #endif 900 } else { 901 bus_space_copy_region_2(memt, memh, 902 scr->pcs.dispoffset + srcoff * 2, 903 memh, scr->pcs.dispoffset + dstoff * 2, 904 nrows * ncols); 905 } 906 } else 907 memcpy(&scr->pcs.mem[dstoff], &scr->pcs.mem[srcoff], 908 nrows * ncols * 2); 909 } 910
Indexes created Thu Sep 25 16:09:42 GMT 2025