pcdisplay.c revision 1.30
1 /* $NetBSD: pcdisplay.c,v 1.30 2006/09/03 06:46:22 christos 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 * 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: pcdisplay.c,v 1.30 2006/09/03 06:46:22 christos Exp $"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/device.h> 36 #include <sys/malloc.h> 37 #include <machine/bus.h> 38 39 #include <dev/isa/isavar.h> 40 41 #include <dev/ic/mc6845reg.h> 42 #include <dev/ic/pcdisplayvar.h> 43 #include <dev/isa/pcdisplayvar.h> 44 45 #include <dev/ic/pcdisplay.h> 46 47 #include <dev/wscons/wsconsio.h> 48 #include <dev/wscons/wsdisplayvar.h> 49 50 #include "pcweasel.h" 51 #if NPCWEASEL > 0 52 #include <dev/isa/weaselreg.h> 53 #include <dev/isa/weaselvar.h> 54 #endif 55 56 struct pcdisplay_config { 57 struct pcdisplayscreen pcs; 58 struct pcdisplay_handle dc_ph; 59 int mono; 60 }; 61 62 struct pcdisplay_softc { 63 struct device sc_dev; 64 struct pcdisplay_config *sc_dc; 65 int nscreens; 66 #if NPCWEASEL > 0 67 struct weasel_handle sc_weasel; 68 #endif 69 }; 70 71 static int pcdisplayconsole, pcdisplay_console_attached; 72 static struct pcdisplay_config pcdisplay_console_dc; 73 74 int pcdisplay_match(struct device *, struct cfdata *, void *); 75 void pcdisplay_attach(struct device *, struct device *, void *); 76 77 static int pcdisplay_is_console(bus_space_tag_t); 78 static int pcdisplay_probe_col(bus_space_tag_t, bus_space_tag_t); 79 static int pcdisplay_probe_mono(bus_space_tag_t, bus_space_tag_t); 80 static void pcdisplay_init(struct pcdisplay_config *, 81 bus_space_tag_t, bus_space_tag_t, 82 int); 83 static int pcdisplay_allocattr(void *, int, int, int, long *); 84 85 CFATTACH_DECL(pcdisplay, sizeof(struct pcdisplay_softc), 86 pcdisplay_match, pcdisplay_attach, NULL, NULL); 87 88 const struct wsdisplay_emulops pcdisplay_emulops = { 89 pcdisplay_cursor, 90 pcdisplay_mapchar, 91 pcdisplay_putchar, 92 pcdisplay_copycols, 93 pcdisplay_erasecols, 94 pcdisplay_copyrows, 95 pcdisplay_eraserows, 96 pcdisplay_allocattr, 97 NULL, /* replaceattr */ 98 }; 99 100 const struct wsscreen_descr pcdisplay_scr = { 101 "80x25", 80, 25, 102 &pcdisplay_emulops, 103 0, 0, /* no font support */ 104 WSSCREEN_REVERSE, /* that's minimal... */ 105 NULL, /* modecookie */ 106 }; 107 108 const struct wsscreen_descr *_pcdisplay_scrlist[] = { 109 &pcdisplay_scr, 110 }; 111 112 const struct wsscreen_list pcdisplay_screenlist = { 113 sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *), 114 _pcdisplay_scrlist 115 }; 116 117 static int pcdisplay_ioctl(void *, void *, u_long, caddr_t, int, struct lwp *); 118 static paddr_t pcdisplay_mmap(void *, void *, off_t, int); 119 static int pcdisplay_alloc_screen(void *, const struct wsscreen_descr *, 120 void **, int *, int *, long *); 121 static void pcdisplay_free_screen(void *, void *); 122 static int pcdisplay_show_screen(void *, void *, int, 123 void (*) (void *, int, int), void *); 124 125 const struct wsdisplay_accessops pcdisplay_accessops = { 126 pcdisplay_ioctl, 127 pcdisplay_mmap, 128 pcdisplay_alloc_screen, 129 pcdisplay_free_screen, 130 pcdisplay_show_screen, 131 NULL, /* load_font */ 132 NULL, /* pollc */ 133 NULL, /* scroll */ 134 }; 135 136 static int 137 pcdisplay_probe_col(iot, memt) 138 bus_space_tag_t iot, memt; 139 { 140 bus_space_handle_t memh, ioh_6845; 141 u_int16_t oldval, val; 142 143 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 144 return (0); 145 oldval = bus_space_read_2(memt, memh, 0); 146 bus_space_write_2(memt, memh, 0, 0xa55a); 147 val = bus_space_read_2(memt, memh, 0); 148 bus_space_write_2(memt, memh, 0, oldval); 149 bus_space_unmap(memt, memh, 0x8000); 150 if (val != 0xa55a) 151 return (0); 152 153 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 154 return (0); 155 bus_space_unmap(iot, ioh_6845, 0x10); 156 157 return (1); 158 } 159 160 static int 161 pcdisplay_probe_mono(iot, memt) 162 bus_space_tag_t iot, memt; 163 { 164 bus_space_handle_t memh, ioh_6845; 165 u_int16_t oldval, val; 166 167 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 168 return (0); 169 oldval = bus_space_read_2(memt, memh, 0); 170 bus_space_write_2(memt, memh, 0, 0xa55a); 171 val = bus_space_read_2(memt, memh, 0); 172 bus_space_write_2(memt, memh, 0, oldval); 173 bus_space_unmap(memt, memh, 0x8000); 174 if (val != 0xa55a) 175 return (0); 176 177 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 178 return (0); 179 bus_space_unmap(iot, ioh_6845, 0x10); 180 181 return (1); 182 } 183 184 static void 185 pcdisplay_init(dc, iot, memt, mono) 186 struct pcdisplay_config *dc; 187 bus_space_tag_t iot, memt; 188 int mono; 189 { 190 struct pcdisplay_handle *ph = &dc->dc_ph; 191 int cpos; 192 193 ph->ph_iot = iot; 194 ph->ph_memt = memt; 195 dc->mono = mono; 196 197 if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000, 198 0, &ph->ph_memh)) 199 panic("pcdisplay_init: cannot map memory"); 200 if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 201 0, &ph->ph_ioh_6845)) 202 panic("pcdisplay_init: cannot map io"); 203 204 /* 205 * initialize the only screen 206 */ 207 dc->pcs.hdl = ph; 208 dc->pcs.type = &pcdisplay_scr; 209 dc->pcs.active = 1; 210 dc->pcs.mem = NULL; 211 212 cpos = pcdisplay_6845_read(ph, cursorh) << 8; 213 cpos |= pcdisplay_6845_read(ph, cursorl); 214 215 /* make sure we have a valid cursor position */ 216 if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) 217 cpos = 0; 218 219 dc->pcs.dispoffset = 0; 220 221 dc->pcs.cursorrow = cpos / pcdisplay_scr.ncols; 222 dc->pcs.cursorcol = cpos % pcdisplay_scr.ncols; 223 pcdisplay_cursor_init(&dc->pcs, 1); 224 } 225 226 int 227 pcdisplay_match(parent, match, aux) 228 struct device *parent; 229 struct cfdata *match; 230 void *aux; 231 { 232 struct isa_attach_args *ia = aux; 233 int mono; 234 235 if (ISA_DIRECT_CONFIG(ia)) 236 return (0); 237 238 /* If values are hardwired to something that they can't be, punt. */ 239 if (ia->ia_nio < 1 || 240 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 241 ia->ia_io[0].ir_addr != 0x3d0 && 242 ia->ia_io[0].ir_addr != 0x3b0)) 243 return (0); 244 245 if (ia->ia_niomem < 1 || 246 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM && 247 ia->ia_iomem[0].ir_addr != 0xb8000 && 248 ia->ia_iomem[0].ir_addr != 0xb0000)) 249 return (0); 250 if (ia->ia_iomem[0].ir_size != 0 && 251 ia->ia_iomem[0].ir_size != 0x8000) 252 return (0); 253 254 if (ia->ia_nirq > 0 && 255 ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ) 256 return (0); 257 258 if (ia->ia_ndrq > 0 && 259 ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ) 260 return (0); 261 262 if (pcdisplay_is_console(ia->ia_iot)) 263 mono = pcdisplay_console_dc.mono; 264 else if (ia->ia_io[0].ir_addr != 0x3b0 && 265 ia->ia_iomem[0].ir_addr != 0xb0000 && 266 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 267 mono = 0; 268 else if (ia->ia_io[0].ir_addr != 0x3d0 && 269 ia->ia_iomem[0].ir_addr != 0xb8000 && 270 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 271 mono = 1; 272 else 273 return (0); 274 275 ia->ia_nio = 1; 276 ia->ia_io[0].ir_addr = mono ? 0x3b0 : 0x3d0; 277 ia->ia_io[0].ir_size = 0x10; 278 279 ia->ia_niomem = 1; 280 ia->ia_iomem[0].ir_size = mono ? 0xb0000 : 0xb8000; 281 ia->ia_iomem[0].ir_size = 0x8000; 282 283 ia->ia_nirq = 0; 284 ia->ia_ndrq = 0; 285 286 return (1); 287 } 288 289 void 290 pcdisplay_attach(parent, self, aux) 291 struct device *parent, *self; 292 void *aux; 293 { 294 struct isa_attach_args *ia = aux; 295 struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; 296 int console; 297 struct pcdisplay_config *dc; 298 struct wsemuldisplaydev_attach_args aa; 299 300 printf("\n"); 301 302 console = pcdisplay_is_console(ia->ia_iot); 303 304 if (console) { 305 dc = &pcdisplay_console_dc; 306 sc->nscreens = 1; 307 pcdisplay_console_attached = 1; 308 } else { 309 dc = malloc(sizeof(struct pcdisplay_config), 310 M_DEVBUF, M_WAITOK); 311 if (ia->ia_io[0].ir_addr != 0x3b0 && 312 ia->ia_iomem[0].ir_addr != 0xb0000 && 313 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 314 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); 315 else if (ia->ia_io[0].ir_addr != 0x3d0 && 316 ia->ia_iomem[0].ir_addr != 0xb8000 && 317 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 318 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); 319 else 320 panic("pcdisplay_attach: display disappeared"); 321 } 322 sc->sc_dc = dc; 323 324 #if NPCWEASEL > 0 325 /* 326 * If the display is monochrome, check to see if we have 327 * a PC-Weasel, and initialize its special features. 328 */ 329 if (dc->mono) { 330 sc->sc_weasel.wh_st = dc->dc_ph.ph_memt; 331 sc->sc_weasel.wh_sh = dc->dc_ph.ph_memh; 332 sc->sc_weasel.wh_parent = &sc->sc_dev; 333 weasel_isa_init(&sc->sc_weasel); 334 } 335 #endif /* NPCWEASEL > 0 */ 336 337 aa.console = console; 338 aa.scrdata = &pcdisplay_screenlist; 339 aa.accessops = &pcdisplay_accessops; 340 aa.accesscookie = sc; 341 342 config_found(self, &aa, wsemuldisplaydevprint); 343 } 344 345 346 int 347 pcdisplay_cnattach(iot, memt) 348 bus_space_tag_t iot, memt; 349 { 350 int mono; 351 352 if (pcdisplay_probe_col(iot, memt)) 353 mono = 0; 354 else if (pcdisplay_probe_mono(iot, memt)) 355 mono = 1; 356 else 357 return (ENXIO); 358 359 pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); 360 361 wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, 362 pcdisplay_console_dc.pcs.cursorcol, 363 pcdisplay_console_dc.pcs.cursorrow, 364 FG_LIGHTGREY | BG_BLACK); 365 366 pcdisplayconsole = 1; 367 return (0); 368 } 369 370 static int 371 pcdisplay_is_console(iot) 372 bus_space_tag_t iot; 373 { 374 if (pcdisplayconsole && 375 !pcdisplay_console_attached && 376 iot == pcdisplay_console_dc.dc_ph.ph_iot) 377 return (1); 378 return (0); 379 } 380 381 static int 382 pcdisplay_ioctl(v, vs, cmd, data, flag, l) 383 void *v; 384 void *vs; 385 u_long cmd; 386 caddr_t data; 387 int flag; 388 struct lwp *l; 389 { 390 /* 391 * XXX "do something!" 392 */ 393 return (EPASSTHROUGH); 394 } 395 396 static paddr_t 397 pcdisplay_mmap(v, vs, offset, prot) 398 void *v; 399 void *vs; 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)(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 Wed Sep 24 05:09:52 GMT 2025