pcdisplay.c revision 1.22
1 /* $NetBSD: pcdisplay.c,v 1.22 2002/10/02 03:10:49 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Matthias Drochner. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: pcdisplay.c,v 1.22 2002/10/02 03:10:49 thorpej Exp $"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/device.h> 42 #include <sys/malloc.h> 43 #include <machine/bus.h> 44 45 #include <dev/isa/isavar.h> 46 47 #include <dev/ic/mc6845reg.h> 48 #include <dev/ic/pcdisplayvar.h> 49 #include <dev/isa/pcdisplayvar.h> 50 51 #include <dev/ic/pcdisplay.h> 52 53 #include <dev/wscons/wsconsio.h> 54 #include <dev/wscons/wsdisplayvar.h> 55 56 #include "pcweasel.h" 57 #if NPCWEASEL > 0 58 #include <dev/isa/weaselreg.h> 59 #include <dev/isa/weaselvar.h> 60 #endif 61 62 struct pcdisplay_config { 63 struct pcdisplayscreen pcs; 64 struct pcdisplay_handle dc_ph; 65 int mono; 66 }; 67 68 struct pcdisplay_softc { 69 struct device sc_dev; 70 struct pcdisplay_config *sc_dc; 71 int nscreens; 72 #if NPCWEASEL > 0 73 struct weasel_handle sc_weasel; 74 #endif 75 }; 76 77 static int pcdisplayconsole, pcdisplay_console_attached; 78 static struct pcdisplay_config pcdisplay_console_dc; 79 80 int pcdisplay_match __P((struct device *, struct cfdata *, void *)); 81 void pcdisplay_attach __P((struct device *, struct device *, void *)); 82 83 static int pcdisplay_is_console __P((bus_space_tag_t)); 84 static int pcdisplay_probe_col __P((bus_space_tag_t, bus_space_tag_t)); 85 static int pcdisplay_probe_mono __P((bus_space_tag_t, bus_space_tag_t)); 86 static void pcdisplay_init __P((struct pcdisplay_config *, 87 bus_space_tag_t, bus_space_tag_t, 88 int)); 89 static int pcdisplay_allocattr __P((void *, int, int, int, long *)); 90 91 CFATTACH_DECL(pcdisplay, sizeof(struct pcdisplay_softc), 92 pcdisplay_match, pcdisplay_attach, NULL, NULL); 93 94 const struct wsdisplay_emulops pcdisplay_emulops = { 95 pcdisplay_cursor, 96 pcdisplay_mapchar, 97 pcdisplay_putchar, 98 pcdisplay_copycols, 99 pcdisplay_erasecols, 100 pcdisplay_copyrows, 101 pcdisplay_eraserows, 102 pcdisplay_allocattr 103 }; 104 105 const struct wsscreen_descr pcdisplay_scr = { 106 "80x25", 80, 25, 107 &pcdisplay_emulops, 108 0, 0, /* no font support */ 109 WSSCREEN_REVERSE /* that's minimal... */ 110 }; 111 112 const struct wsscreen_descr *_pcdisplay_scrlist[] = { 113 &pcdisplay_scr, 114 }; 115 116 const struct wsscreen_list pcdisplay_screenlist = { 117 sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *), 118 _pcdisplay_scrlist 119 }; 120 121 static int pcdisplay_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 122 static paddr_t pcdisplay_mmap __P((void *, off_t, int)); 123 static int pcdisplay_alloc_screen __P((void *, const struct wsscreen_descr *, 124 void **, int *, int *, long *)); 125 static void pcdisplay_free_screen __P((void *, void *)); 126 static int pcdisplay_show_screen __P((void *, void *, int, 127 void (*) (void *, int, int), void *)); 128 129 const struct wsdisplay_accessops pcdisplay_accessops = { 130 pcdisplay_ioctl, 131 pcdisplay_mmap, 132 pcdisplay_alloc_screen, 133 pcdisplay_free_screen, 134 pcdisplay_show_screen, 135 0 /* load_font */ 136 }; 137 138 static int 139 pcdisplay_probe_col(iot, memt) 140 bus_space_tag_t iot, memt; 141 { 142 bus_space_handle_t memh, ioh_6845; 143 u_int16_t oldval, val; 144 145 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 146 return (0); 147 oldval = bus_space_read_2(memt, memh, 0); 148 bus_space_write_2(memt, memh, 0, 0xa55a); 149 val = bus_space_read_2(memt, memh, 0); 150 bus_space_write_2(memt, memh, 0, oldval); 151 bus_space_unmap(memt, memh, 0x8000); 152 if (val != 0xa55a) 153 return (0); 154 155 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 156 return (0); 157 bus_space_unmap(iot, ioh_6845, 0x10); 158 159 return (1); 160 } 161 162 static int 163 pcdisplay_probe_mono(iot, memt) 164 bus_space_tag_t iot, memt; 165 { 166 bus_space_handle_t memh, ioh_6845; 167 u_int16_t oldval, val; 168 169 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 170 return (0); 171 oldval = bus_space_read_2(memt, memh, 0); 172 bus_space_write_2(memt, memh, 0, 0xa55a); 173 val = bus_space_read_2(memt, memh, 0); 174 bus_space_write_2(memt, memh, 0, oldval); 175 bus_space_unmap(memt, memh, 0x8000); 176 if (val != 0xa55a) 177 return (0); 178 179 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 180 return (0); 181 bus_space_unmap(iot, ioh_6845, 0x10); 182 183 return (1); 184 } 185 186 static void 187 pcdisplay_init(dc, iot, memt, mono) 188 struct pcdisplay_config *dc; 189 bus_space_tag_t iot, memt; 190 int mono; 191 { 192 struct pcdisplay_handle *ph = &dc->dc_ph; 193 int cpos; 194 195 ph->ph_iot = iot; 196 ph->ph_memt = memt; 197 dc->mono = mono; 198 199 if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000, 200 0, &ph->ph_memh)) 201 panic("pcdisplay_init: cannot map memory"); 202 if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 203 0, &ph->ph_ioh_6845)) 204 panic("pcdisplay_init: cannot map io"); 205 206 /* 207 * initialize the only screen 208 */ 209 dc->pcs.hdl = ph; 210 dc->pcs.type = &pcdisplay_scr; 211 dc->pcs.active = 1; 212 dc->pcs.mem = NULL; 213 214 cpos = pcdisplay_6845_read(ph, cursorh) << 8; 215 cpos |= pcdisplay_6845_read(ph, cursorl); 216 217 /* make sure we have a valid cursor position */ 218 if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) 219 cpos = 0; 220 221 dc->pcs.dispoffset = 0; 222 223 dc->pcs.cursorrow = cpos / pcdisplay_scr.ncols; 224 dc->pcs.cursorcol = cpos % pcdisplay_scr.ncols; 225 pcdisplay_cursor_init(&dc->pcs, 1); 226 } 227 228 int 229 pcdisplay_match(parent, match, aux) 230 struct device *parent; 231 struct cfdata *match; 232 void *aux; 233 { 234 struct isa_attach_args *ia = aux; 235 int mono; 236 237 if (ISA_DIRECT_CONFIG(ia)) 238 return (0); 239 240 /* If values are hardwired to something that they can't be, punt. */ 241 if (ia->ia_nio < 1 || 242 (ia->ia_io[0].ir_addr != ISACF_PORT_DEFAULT && 243 ia->ia_io[0].ir_addr != 0x3d0 && 244 ia->ia_io[0].ir_addr != 0x3b0)) 245 return (0); 246 247 if (ia->ia_niomem < 1 || 248 (ia->ia_iomem[0].ir_addr != ISACF_IOMEM_DEFAULT && 249 ia->ia_iomem[0].ir_addr != 0xb8000 && 250 ia->ia_iomem[0].ir_addr != 0xb0000)) 251 return (0); 252 if (ia->ia_iomem[0].ir_size != 0 && 253 ia->ia_iomem[0].ir_size != 0x8000) 254 return (0); 255 256 if (ia->ia_nirq > 0 && 257 ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT) 258 return (0); 259 260 if (ia->ia_ndrq > 0 && 261 ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT) 262 return (0); 263 264 if (pcdisplay_is_console(ia->ia_iot)) 265 mono = pcdisplay_console_dc.mono; 266 else if (ia->ia_io[0].ir_addr != 0x3b0 && 267 ia->ia_iomem[0].ir_addr != 0xb0000 && 268 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 269 mono = 0; 270 else if (ia->ia_io[0].ir_addr != 0x3d0 && 271 ia->ia_iomem[0].ir_addr != 0xb8000 && 272 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 273 mono = 1; 274 else 275 return (0); 276 277 ia->ia_nio = 1; 278 ia->ia_io[0].ir_addr = mono ? 0x3b0 : 0x3d0; 279 ia->ia_io[0].ir_size = 0x10; 280 281 ia->ia_niomem = 1; 282 ia->ia_iomem[0].ir_size = mono ? 0xb0000 : 0xb8000; 283 ia->ia_iomem[0].ir_size = 0x8000; 284 285 ia->ia_nirq = 0; 286 ia->ia_ndrq = 0; 287 288 return (1); 289 } 290 291 void 292 pcdisplay_attach(parent, self, aux) 293 struct device *parent, *self; 294 void *aux; 295 { 296 struct isa_attach_args *ia = aux; 297 struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; 298 int console; 299 struct pcdisplay_config *dc; 300 struct wsemuldisplaydev_attach_args aa; 301 302 printf("\n"); 303 304 console = pcdisplay_is_console(ia->ia_iot); 305 306 if (console) { 307 dc = &pcdisplay_console_dc; 308 sc->nscreens = 1; 309 pcdisplay_console_attached = 1; 310 } else { 311 dc = malloc(sizeof(struct pcdisplay_config), 312 M_DEVBUF, M_WAITOK); 313 if (ia->ia_io[0].ir_addr != 0x3b0 && 314 ia->ia_iomem[0].ir_addr != 0xb0000 && 315 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 316 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); 317 else if (ia->ia_io[0].ir_addr != 0x3d0 && 318 ia->ia_iomem[0].ir_addr != 0xb8000 && 319 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 320 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); 321 else 322 panic("pcdisplay_attach: display disappeared"); 323 } 324 sc->sc_dc = dc; 325 326 #if NPCWEASEL > 0 327 /* 328 * If the display is monochrome, check to see if we have 329 * a PC-Weasel, and initialize its special features. 330 */ 331 if (dc->mono) { 332 sc->sc_weasel.wh_st = dc->dc_ph.ph_memt; 333 sc->sc_weasel.wh_sh = dc->dc_ph.ph_memh; 334 sc->sc_weasel.wh_parent = &sc->sc_dev; 335 weasel_isa_init(&sc->sc_weasel); 336 } 337 #endif /* NPCWEASEL > 0 */ 338 339 aa.console = console; 340 aa.scrdata = &pcdisplay_screenlist; 341 aa.accessops = &pcdisplay_accessops; 342 aa.accesscookie = sc; 343 344 config_found(self, &aa, wsemuldisplaydevprint); 345 } 346 347 348 int 349 pcdisplay_cnattach(iot, memt) 350 bus_space_tag_t iot, memt; 351 { 352 int mono; 353 354 if (pcdisplay_probe_col(iot, memt)) 355 mono = 0; 356 else if (pcdisplay_probe_mono(iot, memt)) 357 mono = 1; 358 else 359 return (ENXIO); 360 361 pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); 362 363 wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, 364 pcdisplay_console_dc.pcs.cursorcol, 365 pcdisplay_console_dc.pcs.cursorrow, 366 FG_LIGHTGREY | BG_BLACK); 367 368 pcdisplayconsole = 1; 369 return (0); 370 } 371 372 static int 373 pcdisplay_is_console(iot) 374 bus_space_tag_t iot; 375 { 376 if (pcdisplayconsole && 377 !pcdisplay_console_attached && 378 iot == pcdisplay_console_dc.dc_ph.ph_iot) 379 return (1); 380 return (0); 381 } 382 383 static int 384 pcdisplay_ioctl(v, cmd, data, flag, p) 385 void *v; 386 u_long cmd; 387 caddr_t data; 388 int flag; 389 struct proc *p; 390 { 391 /* 392 * XXX "do something!" 393 */ 394 return (EPASSTHROUGH); 395 } 396 397 static paddr_t 398 pcdisplay_mmap(v, offset, prot) 399 void *v; 400 off_t offset; 401 int prot; 402 { 403 return (-1); 404 } 405 406 static int 407 pcdisplay_alloc_screen(v, type, cookiep, curxp, curyp, defattrp) 408 void *v; 409 const struct wsscreen_descr *type; 410 void **cookiep; 411 int *curxp, *curyp; 412 long *defattrp; 413 { 414 struct pcdisplay_softc *sc = v; 415 416 if (sc->nscreens > 0) 417 return (ENOMEM); 418 419 *cookiep = sc->sc_dc; 420 *curxp = 0; 421 *curyp = 0; 422 *defattrp = FG_LIGHTGREY | BG_BLACK; 423 sc->nscreens++; 424 return (0); 425 } 426 427 static void 428 pcdisplay_free_screen(v, cookie) 429 void *v; 430 void *cookie; 431 { 432 struct pcdisplay_softc *sc = v; 433 434 if (sc->sc_dc == &pcdisplay_console_dc) 435 panic("pcdisplay_free_screen: console"); 436 437 sc->nscreens--; 438 } 439 440 static int 441 pcdisplay_show_screen(v, cookie, waitok, cb, cbarg) 442 void *v; 443 void *cookie; 444 int waitok; 445 void (*cb) __P((void *, int, int)); 446 void *cbarg; 447 { 448 #ifdef DIAGNOSTIC 449 struct pcdisplay_softc *sc = v; 450 451 if (cookie != sc->sc_dc) 452 panic("pcdisplay_show_screen: bad screen"); 453 #endif 454 return (0); 455 } 456 457 static int 458 pcdisplay_allocattr(id, fg, bg, flags, attrp) 459 void *id; 460 int fg, bg; 461 int flags; 462 long *attrp; 463 { 464 if (flags & WSATTR_REVERSE) 465 *attrp = FG_BLACK | BG_LIGHTGREY; 466 else 467 *attrp = FG_LIGHTGREY | BG_BLACK; 468 return (0); 469 } 470
Indexes created Tue Sep 23 14:10:03 GMT 2025