pcdisplay.c revision 1.35
1 /* $NetBSD: pcdisplay.c,v 1.35 2009/03/14 15:36:18 dsl 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 1.35 2009/03/14 15:36:18 dsl 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 <sys/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, void *, 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(struct device *parent, struct cfdata *match, 228 void *aux) 229 { 230 struct isa_attach_args *ia = aux; 231 int mono; 232 233 if (ISA_DIRECT_CONFIG(ia)) 234 return (0); 235 236 /* If values are hardwired to something that they can't be, punt. */ 237 if (ia->ia_nio < 1 || 238 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 239 ia->ia_io[0].ir_addr != 0x3d0 && 240 ia->ia_io[0].ir_addr != 0x3b0)) 241 return (0); 242 243 if (ia->ia_niomem < 1 || 244 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM && 245 ia->ia_iomem[0].ir_addr != 0xb8000 && 246 ia->ia_iomem[0].ir_addr != 0xb0000)) 247 return (0); 248 if (ia->ia_iomem[0].ir_size != 0 && 249 ia->ia_iomem[0].ir_size != 0x8000) 250 return (0); 251 252 if (ia->ia_nirq > 0 && 253 ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ) 254 return (0); 255 256 if (ia->ia_ndrq > 0 && 257 ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ) 258 return (0); 259 260 if (pcdisplay_is_console(ia->ia_iot)) 261 mono = pcdisplay_console_dc.mono; 262 else if (ia->ia_io[0].ir_addr != 0x3b0 && 263 ia->ia_iomem[0].ir_addr != 0xb0000 && 264 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 265 mono = 0; 266 else if (ia->ia_io[0].ir_addr != 0x3d0 && 267 ia->ia_iomem[0].ir_addr != 0xb8000 && 268 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 269 mono = 1; 270 else 271 return (0); 272 273 ia->ia_nio = 1; 274 ia->ia_io[0].ir_addr = mono ? 0x3b0 : 0x3d0; 275 ia->ia_io[0].ir_size = 0x10; 276 277 ia->ia_niomem = 1; 278 ia->ia_iomem[0].ir_size = mono ? 0xb0000 : 0xb8000; 279 ia->ia_iomem[0].ir_size = 0x8000; 280 281 ia->ia_nirq = 0; 282 ia->ia_ndrq = 0; 283 284 return (1); 285 } 286 287 void 288 pcdisplay_attach(struct device *parent, struct device *self, void *aux) 289 { 290 struct isa_attach_args *ia = aux; 291 struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; 292 int console; 293 struct pcdisplay_config *dc; 294 struct wsemuldisplaydev_attach_args aa; 295 296 printf("\n"); 297 298 console = pcdisplay_is_console(ia->ia_iot); 299 300 if (console) { 301 dc = &pcdisplay_console_dc; 302 sc->nscreens = 1; 303 pcdisplay_console_attached = 1; 304 } else { 305 dc = malloc(sizeof(struct pcdisplay_config), 306 M_DEVBUF, M_WAITOK); 307 if (ia->ia_io[0].ir_addr != 0x3b0 && 308 ia->ia_iomem[0].ir_addr != 0xb0000 && 309 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 310 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); 311 else if (ia->ia_io[0].ir_addr != 0x3d0 && 312 ia->ia_iomem[0].ir_addr != 0xb8000 && 313 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 314 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); 315 else 316 panic("pcdisplay_attach: display disappeared"); 317 } 318 sc->sc_dc = dc; 319 320 #if NPCWEASEL > 0 321 /* 322 * If the display is monochrome, check to see if we have 323 * a PC-Weasel, and initialize its special features. 324 */ 325 if (dc->mono) { 326 sc->sc_weasel.wh_st = dc->dc_ph.ph_memt; 327 sc->sc_weasel.wh_sh = dc->dc_ph.ph_memh; 328 sc->sc_weasel.wh_parent = &sc->sc_dev; 329 weasel_isa_init(&sc->sc_weasel); 330 } 331 #endif /* NPCWEASEL > 0 */ 332 333 aa.console = console; 334 aa.scrdata = &pcdisplay_screenlist; 335 aa.accessops = &pcdisplay_accessops; 336 aa.accesscookie = sc; 337 338 config_found(self, &aa, wsemuldisplaydevprint); 339 } 340 341 342 int 343 pcdisplay_cnattach(iot, memt) 344 bus_space_tag_t iot, memt; 345 { 346 int mono; 347 348 if (pcdisplay_probe_col(iot, memt)) 349 mono = 0; 350 else if (pcdisplay_probe_mono(iot, memt)) 351 mono = 1; 352 else 353 return (ENXIO); 354 355 pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); 356 357 wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, 358 pcdisplay_console_dc.pcs.cursorcol, 359 pcdisplay_console_dc.pcs.cursorrow, 360 FG_LIGHTGREY | BG_BLACK); 361 362 pcdisplayconsole = 1; 363 return (0); 364 } 365 366 static int 367 pcdisplay_is_console(bus_space_tag_t iot) 368 { 369 if (pcdisplayconsole && 370 !pcdisplay_console_attached && 371 iot == pcdisplay_console_dc.dc_ph.ph_iot) 372 return (1); 373 return (0); 374 } 375 376 static int 377 pcdisplay_ioctl(void *v, void *vs, u_long cmd, 378 void *data, int flag, struct lwp *l) 379 { 380 /* 381 * XXX "do something!" 382 */ 383 return (EPASSTHROUGH); 384 } 385 386 static paddr_t 387 pcdisplay_mmap(void *v, void *vs, off_t offset, 388 int prot) 389 { 390 return (-1); 391 } 392 393 static int 394 pcdisplay_alloc_screen(void *v, const struct wsscreen_descr *type, 395 void **cookiep, int *curxp, int *curyp, long *defattrp) 396 { 397 struct pcdisplay_softc *sc = v; 398 399 if (sc->nscreens > 0) 400 return (ENOMEM); 401 402 *cookiep = sc->sc_dc; 403 *curxp = 0; 404 *curyp = 0; 405 *defattrp = FG_LIGHTGREY | BG_BLACK; 406 sc->nscreens++; 407 return (0); 408 } 409 410 static void 411 pcdisplay_free_screen(void *v, void *cookie) 412 { 413 struct pcdisplay_softc *sc = v; 414 415 if (sc->sc_dc == &pcdisplay_console_dc) 416 panic("pcdisplay_free_screen: console"); 417 418 sc->nscreens--; 419 } 420 421 static int 422 pcdisplay_show_screen(void *v, void *cookie, 423 int waitok, void (*cb)(void *, int, int), 424 void *cbarg) 425 { 426 #ifdef DIAGNOSTIC 427 struct pcdisplay_softc *sc = v; 428 429 if (cookie != sc->sc_dc) 430 panic("pcdisplay_show_screen: bad screen"); 431 #endif 432 return (0); 433 } 434 435 static int 436 pcdisplay_allocattr(void *id, int fg, int bg, 437 int flags, long *attrp) 438 { 439 if (flags & WSATTR_REVERSE) 440 *attrp = FG_BLACK | BG_LIGHTGREY; 441 else 442 *attrp = FG_LIGHTGREY | BG_BLACK; 443 return (0); 444 } 445
Indexes created Tue Sep 23 22:09:46 GMT 2025