pcdisplay.c revision 1.6
1 /* $NetBSD: pcdisplay.c,v 1.6 1999/01/11 21:35:54 drochner 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/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/malloc.h> 40 #include <machine/bus.h> 41 42 #include <dev/isa/isavar.h> 43 44 #include <dev/ic/mc6845reg.h> 45 #include <dev/ic/pcdisplayvar.h> 46 #include <dev/isa/pcdisplayvar.h> 47 48 #include <dev/ic/pcdisplay.h> 49 50 #include <dev/wscons/wsconsio.h> 51 #include <dev/wscons/wsdisplayvar.h> 52 53 struct pcdisplay_config { 54 struct pcdisplayscreen pcs; 55 struct pcdisplay_handle dc_ph; 56 int mono; 57 }; 58 59 struct pcdisplay_softc { 60 struct device sc_dev; 61 struct pcdisplay_config *sc_dc; 62 int nscreens; 63 }; 64 65 static int pcdisplayconsole, pcdisplay_console_attached; 66 static struct pcdisplay_config pcdisplay_console_dc; 67 68 int pcdisplay_match __P((struct device *, struct cfdata *, void *)); 69 void pcdisplay_attach __P((struct device *, struct device *, void *)); 70 71 static int pcdisplay_is_console __P((bus_space_tag_t)); 72 static int pcdisplay_probe_col __P((bus_space_tag_t, bus_space_tag_t)); 73 static int pcdisplay_probe_mono __P((bus_space_tag_t, bus_space_tag_t)); 74 static void pcdisplay_init __P((struct pcdisplay_config *, 75 bus_space_tag_t, bus_space_tag_t, 76 int)); 77 static int pcdisplay_alloc_attr __P((void *, int, int, int, long *)); 78 79 struct cfattach pcdisplay_ca = { 80 sizeof(struct pcdisplay_softc), pcdisplay_match, pcdisplay_attach, 81 }; 82 83 const struct wsdisplay_emulops pcdisplay_emulops = { 84 pcdisplay_cursor, 85 pcdisplay_mapchar, 86 pcdisplay_putchar, 87 pcdisplay_copycols, 88 pcdisplay_erasecols, 89 pcdisplay_copyrows, 90 pcdisplay_eraserows, 91 pcdisplay_alloc_attr 92 }; 93 94 const struct wsscreen_descr pcdisplay_scr = { 95 "80x25", 80, 25, 96 &pcdisplay_emulops, 97 0, 0, /* no font support */ 98 WSSCREEN_REVERSE /* that's minimal... */ 99 }; 100 101 const struct wsscreen_descr *_pcdisplay_scrlist[] = { 102 &pcdisplay_scr, 103 }; 104 105 const struct wsscreen_list pcdisplay_screenlist = { 106 sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *), 107 _pcdisplay_scrlist 108 }; 109 110 static int pcdisplay_ioctl __P((void *, u_long, caddr_t, int, struct proc *)); 111 static int pcdisplay_mmap __P((void *, off_t, int)); 112 static int pcdisplay_alloc_screen __P((void *, const struct wsscreen_descr *, 113 void **, int *, int *, long *)); 114 static void pcdisplay_free_screen __P((void *, void *)); 115 static void pcdisplay_show_screen __P((void *, void *)); 116 117 const struct wsdisplay_accessops pcdisplay_accessops = { 118 pcdisplay_ioctl, 119 pcdisplay_mmap, 120 pcdisplay_alloc_screen, 121 pcdisplay_free_screen, 122 pcdisplay_show_screen, 123 0 /* load_font */ 124 }; 125 126 static int 127 pcdisplay_probe_col(iot, memt) 128 bus_space_tag_t iot, memt; 129 { 130 bus_space_handle_t memh, ioh_6845; 131 u_int16_t oldval, val; 132 133 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 134 return (0); 135 oldval = bus_space_read_2(memt, memh, 0); 136 bus_space_write_2(memt, memh, 0, 0xa55a); 137 val = bus_space_read_2(memt, memh, 0); 138 bus_space_write_2(memt, memh, 0, oldval); 139 bus_space_unmap(memt, memh, 0x8000); 140 if (val != 0xa55a) 141 return (0); 142 143 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 144 return (0); 145 bus_space_unmap(iot, ioh_6845, 0x10); 146 147 return (1); 148 } 149 150 static int 151 pcdisplay_probe_mono(iot, memt) 152 bus_space_tag_t iot, memt; 153 { 154 bus_space_handle_t memh, ioh_6845; 155 u_int16_t oldval, val; 156 157 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 158 return (0); 159 oldval = bus_space_read_2(memt, memh, 0); 160 bus_space_write_2(memt, memh, 0, 0xa55a); 161 val = bus_space_read_2(memt, memh, 0); 162 bus_space_write_2(memt, memh, 0, oldval); 163 bus_space_unmap(memt, memh, 0x8000); 164 if (val != 0xa55a) 165 return (0); 166 167 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 168 return (0); 169 bus_space_unmap(iot, ioh_6845, 0x10); 170 171 return (1); 172 } 173 174 static void 175 pcdisplay_init(dc, iot, memt, mono) 176 struct pcdisplay_config *dc; 177 bus_space_tag_t iot, memt; 178 int mono; 179 { 180 struct pcdisplay_handle *ph = &dc->dc_ph; 181 int cpos; 182 183 ph->ph_iot = iot; 184 ph->ph_memt = memt; 185 dc->mono = mono; 186 187 if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000, 188 0, &ph->ph_memh)) 189 panic("pcdisplay_init: cannot map memory"); 190 if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 191 0, &ph->ph_ioh_6845)) 192 panic("pcdisplay_init: cannot map io"); 193 194 /* 195 * initialize the only screen 196 */ 197 dc->pcs.hdl = ph; 198 dc->pcs.type = &pcdisplay_scr; 199 dc->pcs.active = 1; 200 dc->pcs.mem = NULL; 201 202 cpos = pcdisplay_6845_read(ph, cursorh) << 8; 203 cpos |= pcdisplay_6845_read(ph, cursorl); 204 205 /* make sure we have a valid cursor position */ 206 if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) 207 cpos = 0; 208 209 dc->pcs.dispoffset = 0; 210 211 dc->pcs.vc_crow = cpos / pcdisplay_scr.ncols; 212 dc->pcs.vc_ccol = cpos % pcdisplay_scr.ncols; 213 dc->pcs.cursoron = 1; 214 } 215 216 int 217 pcdisplay_match(parent, match, aux) 218 struct device *parent; 219 struct cfdata *match; 220 void *aux; 221 { 222 struct isa_attach_args *ia = aux; 223 int mono; 224 225 /* If values are hardwired to something that they can't be, punt. */ 226 if ((ia->ia_iobase != IOBASEUNK && 227 ia->ia_iobase != 0x3d0 && 228 ia->ia_iobase != 0x3b0) || 229 /* ia->ia_iosize != 0 || XXX isa.c */ 230 (ia->ia_maddr != MADDRUNK && 231 ia->ia_maddr != 0xb8000 && 232 ia->ia_maddr != 0xb0000) || 233 (ia->ia_msize != 0 && ia->ia_msize != 0x8000) || 234 ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) 235 return (0); 236 237 if (pcdisplay_is_console(ia->ia_iot)) 238 mono = pcdisplay_console_dc.mono; 239 else if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 && 240 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 241 mono = 0; 242 else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 && 243 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 244 mono = 1; 245 else 246 return (0); 247 248 ia->ia_iobase = mono ? 0x3b0 : 0x3d0; 249 ia->ia_iosize = 0x10; 250 ia->ia_maddr = mono ? 0xb0000 : 0xb8000; 251 ia->ia_msize = 0x8000; 252 return (1); 253 } 254 255 void 256 pcdisplay_attach(parent, self, aux) 257 struct device *parent, *self; 258 void *aux; 259 { 260 struct isa_attach_args *ia = aux; 261 struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; 262 int console; 263 struct pcdisplay_config *dc; 264 struct wsemuldisplaydev_attach_args aa; 265 266 printf("\n"); 267 268 console = pcdisplay_is_console(ia->ia_iot); 269 270 if (console) { 271 dc = &pcdisplay_console_dc; 272 sc->nscreens = 1; 273 pcdisplay_console_attached = 1; 274 } else { 275 dc = malloc(sizeof(struct pcdisplay_config), 276 M_DEVBUF, M_WAITOK); 277 if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 && 278 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 279 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); 280 else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 && 281 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 282 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); 283 else 284 panic("pcdisplay_attach: display disappeared"); 285 } 286 sc->sc_dc = dc; 287 288 aa.console = console; 289 aa.scrdata = &pcdisplay_screenlist; 290 aa.accessops = &pcdisplay_accessops; 291 aa.accesscookie = sc; 292 293 config_found(self, &aa, wsemuldisplaydevprint); 294 } 295 296 297 int 298 pcdisplay_cnattach(iot, memt) 299 bus_space_tag_t iot, memt; 300 { 301 int mono; 302 303 if (pcdisplay_probe_col(iot, memt)) 304 mono = 0; 305 else if (pcdisplay_probe_mono(iot, memt)) 306 mono = 1; 307 else 308 return (ENXIO); 309 310 pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); 311 312 wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, 313 pcdisplay_console_dc.pcs.vc_ccol, 314 pcdisplay_console_dc.pcs.vc_crow, 315 FG_LIGHTGREY | BG_BLACK); 316 317 pcdisplayconsole = 1; 318 return (0); 319 } 320 321 static int 322 pcdisplay_is_console(iot) 323 bus_space_tag_t iot; 324 { 325 if (pcdisplayconsole && 326 !pcdisplay_console_attached && 327 iot == pcdisplay_console_dc.dc_ph.ph_iot) 328 return (1); 329 return (0); 330 } 331 332 static int 333 pcdisplay_ioctl(v, cmd, data, flag, p) 334 void *v; 335 u_long cmd; 336 caddr_t data; 337 int flag; 338 struct proc *p; 339 { 340 /* 341 * XXX "do something!" 342 */ 343 return (-1); 344 } 345 346 static int 347 pcdisplay_mmap(v, offset, prot) 348 void *v; 349 off_t offset; 350 int prot; 351 { 352 return (-1); 353 } 354 355 static int 356 pcdisplay_alloc_screen(v, type, cookiep, curxp, curyp, defattrp) 357 void *v; 358 const struct wsscreen_descr *type; 359 void **cookiep; 360 int *curxp, *curyp; 361 long *defattrp; 362 { 363 struct pcdisplay_softc *sc = v; 364 365 if (sc->nscreens > 0) 366 return (ENOMEM); 367 368 *cookiep = sc->sc_dc; 369 *curxp = 0; 370 *curyp = 0; 371 *defattrp = FG_LIGHTGREY | BG_BLACK; 372 sc->nscreens++; 373 return (0); 374 } 375 376 static void 377 pcdisplay_free_screen(v, cookie) 378 void *v; 379 void *cookie; 380 { 381 struct pcdisplay_softc *sc = v; 382 383 if (sc->sc_dc == &pcdisplay_console_dc) 384 panic("pcdisplay_free_screen: console"); 385 386 sc->nscreens--; 387 } 388 389 static void 390 pcdisplay_show_screen(v, cookie) 391 void *v; 392 void *cookie; 393 { 394 #ifdef DIAGNOSTIC 395 struct pcdisplay_softc *sc = v; 396 397 if (cookie != sc->sc_dc) 398 panic("pcdisplay_show_screen: bad screen"); 399 #endif 400 } 401 402 static int 403 pcdisplay_alloc_attr(id, fg, bg, flags, attrp) 404 void *id; 405 int fg, bg; 406 int flags; 407 long *attrp; 408 { 409 if (flags & WSATTR_REVERSE) 410 *attrp = FG_BLACK | BG_LIGHTGREY; 411 else 412 *attrp = FG_LIGHTGREY | BG_BLACK; 413 return (0); 414 } 415
Indexes created Wed Sep 24 05:09:52 GMT 2025