pcdisplay.c revision 1.36
1 /* $NetBSD: pcdisplay.c,v 1.36 2009/03/14 21:04:20 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 1.36 2009/03/14 21:04:20 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(bus_space_tag_t iot, bus_space_tag_t memt) 138 { 139 bus_space_handle_t memh, ioh_6845; 140 u_int16_t oldval, val; 141 142 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 143 return (0); 144 oldval = bus_space_read_2(memt, memh, 0); 145 bus_space_write_2(memt, memh, 0, 0xa55a); 146 val = bus_space_read_2(memt, memh, 0); 147 bus_space_write_2(memt, memh, 0, oldval); 148 bus_space_unmap(memt, memh, 0x8000); 149 if (val != 0xa55a) 150 return (0); 151 152 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 153 return (0); 154 bus_space_unmap(iot, ioh_6845, 0x10); 155 156 return (1); 157 } 158 159 static int 160 pcdisplay_probe_mono(bus_space_tag_t iot, bus_space_tag_t memt) 161 { 162 bus_space_handle_t memh, ioh_6845; 163 u_int16_t oldval, val; 164 165 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 166 return (0); 167 oldval = bus_space_read_2(memt, memh, 0); 168 bus_space_write_2(memt, memh, 0, 0xa55a); 169 val = bus_space_read_2(memt, memh, 0); 170 bus_space_write_2(memt, memh, 0, oldval); 171 bus_space_unmap(memt, memh, 0x8000); 172 if (val != 0xa55a) 173 return (0); 174 175 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 176 return (0); 177 bus_space_unmap(iot, ioh_6845, 0x10); 178 179 return (1); 180 } 181 182 static void 183 pcdisplay_init(struct pcdisplay_config *dc, bus_space_tag_t iot, bus_space_tag_t memt, int mono) 184 { 185 struct pcdisplay_handle *ph = &dc->dc_ph; 186 int cpos; 187 188 ph->ph_iot = iot; 189 ph->ph_memt = memt; 190 dc->mono = mono; 191 192 if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000, 193 0, &ph->ph_memh)) 194 panic("pcdisplay_init: cannot map memory"); 195 if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 196 0, &ph->ph_ioh_6845)) 197 panic("pcdisplay_init: cannot map io"); 198 199 /* 200 * initialize the only screen 201 */ 202 dc->pcs.hdl = ph; 203 dc->pcs.type = &pcdisplay_scr; 204 dc->pcs.active = 1; 205 dc->pcs.mem = NULL; 206 207 cpos = pcdisplay_6845_read(ph, cursorh) << 8; 208 cpos |= pcdisplay_6845_read(ph, cursorl); 209 210 /* make sure we have a valid cursor position */ 211 if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) 212 cpos = 0; 213 214 dc->pcs.dispoffset = 0; 215 216 dc->pcs.cursorrow = cpos / pcdisplay_scr.ncols; 217 dc->pcs.cursorcol = cpos % pcdisplay_scr.ncols; 218 pcdisplay_cursor_init(&dc->pcs, 1); 219 } 220 221 int 222 pcdisplay_match(struct device *parent, struct cfdata *match, 223 void *aux) 224 { 225 struct isa_attach_args *ia = aux; 226 int mono; 227 228 if (ISA_DIRECT_CONFIG(ia)) 229 return (0); 230 231 /* If values are hardwired to something that they can't be, punt. */ 232 if (ia->ia_nio < 1 || 233 (ia->ia_io[0].ir_addr != ISA_UNKNOWN_PORT && 234 ia->ia_io[0].ir_addr != 0x3d0 && 235 ia->ia_io[0].ir_addr != 0x3b0)) 236 return (0); 237 238 if (ia->ia_niomem < 1 || 239 (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM && 240 ia->ia_iomem[0].ir_addr != 0xb8000 && 241 ia->ia_iomem[0].ir_addr != 0xb0000)) 242 return (0); 243 if (ia->ia_iomem[0].ir_size != 0 && 244 ia->ia_iomem[0].ir_size != 0x8000) 245 return (0); 246 247 if (ia->ia_nirq > 0 && 248 ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ) 249 return (0); 250 251 if (ia->ia_ndrq > 0 && 252 ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ) 253 return (0); 254 255 if (pcdisplay_is_console(ia->ia_iot)) 256 mono = pcdisplay_console_dc.mono; 257 else if (ia->ia_io[0].ir_addr != 0x3b0 && 258 ia->ia_iomem[0].ir_addr != 0xb0000 && 259 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 260 mono = 0; 261 else if (ia->ia_io[0].ir_addr != 0x3d0 && 262 ia->ia_iomem[0].ir_addr != 0xb8000 && 263 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 264 mono = 1; 265 else 266 return (0); 267 268 ia->ia_nio = 1; 269 ia->ia_io[0].ir_addr = mono ? 0x3b0 : 0x3d0; 270 ia->ia_io[0].ir_size = 0x10; 271 272 ia->ia_niomem = 1; 273 ia->ia_iomem[0].ir_size = mono ? 0xb0000 : 0xb8000; 274 ia->ia_iomem[0].ir_size = 0x8000; 275 276 ia->ia_nirq = 0; 277 ia->ia_ndrq = 0; 278 279 return (1); 280 } 281 282 void 283 pcdisplay_attach(struct device *parent, struct device *self, void *aux) 284 { 285 struct isa_attach_args *ia = aux; 286 struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; 287 int console; 288 struct pcdisplay_config *dc; 289 struct wsemuldisplaydev_attach_args aa; 290 291 printf("\n"); 292 293 console = pcdisplay_is_console(ia->ia_iot); 294 295 if (console) { 296 dc = &pcdisplay_console_dc; 297 sc->nscreens = 1; 298 pcdisplay_console_attached = 1; 299 } else { 300 dc = malloc(sizeof(struct pcdisplay_config), 301 M_DEVBUF, M_WAITOK); 302 if (ia->ia_io[0].ir_addr != 0x3b0 && 303 ia->ia_iomem[0].ir_addr != 0xb0000 && 304 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 305 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); 306 else if (ia->ia_io[0].ir_addr != 0x3d0 && 307 ia->ia_iomem[0].ir_addr != 0xb8000 && 308 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 309 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); 310 else 311 panic("pcdisplay_attach: display disappeared"); 312 } 313 sc->sc_dc = dc; 314 315 #if NPCWEASEL > 0 316 /* 317 * If the display is monochrome, check to see if we have 318 * a PC-Weasel, and initialize its special features. 319 */ 320 if (dc->mono) { 321 sc->sc_weasel.wh_st = dc->dc_ph.ph_memt; 322 sc->sc_weasel.wh_sh = dc->dc_ph.ph_memh; 323 sc->sc_weasel.wh_parent = &sc->sc_dev; 324 weasel_isa_init(&sc->sc_weasel); 325 } 326 #endif /* NPCWEASEL > 0 */ 327 328 aa.console = console; 329 aa.scrdata = &pcdisplay_screenlist; 330 aa.accessops = &pcdisplay_accessops; 331 aa.accesscookie = sc; 332 333 config_found(self, &aa, wsemuldisplaydevprint); 334 } 335 336 337 int 338 pcdisplay_cnattach(bus_space_tag_t iot, bus_space_tag_t memt) 339 { 340 int mono; 341 342 if (pcdisplay_probe_col(iot, memt)) 343 mono = 0; 344 else if (pcdisplay_probe_mono(iot, memt)) 345 mono = 1; 346 else 347 return (ENXIO); 348 349 pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); 350 351 wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, 352 pcdisplay_console_dc.pcs.cursorcol, 353 pcdisplay_console_dc.pcs.cursorrow, 354 FG_LIGHTGREY | BG_BLACK); 355 356 pcdisplayconsole = 1; 357 return (0); 358 } 359 360 static int 361 pcdisplay_is_console(bus_space_tag_t iot) 362 { 363 if (pcdisplayconsole && 364 !pcdisplay_console_attached && 365 iot == pcdisplay_console_dc.dc_ph.ph_iot) 366 return (1); 367 return (0); 368 } 369 370 static int 371 pcdisplay_ioctl(void *v, void *vs, u_long cmd, 372 void *data, int flag, struct lwp *l) 373 { 374 /* 375 * XXX "do something!" 376 */ 377 return (EPASSTHROUGH); 378 } 379 380 static paddr_t 381 pcdisplay_mmap(void *v, void *vs, off_t offset, 382 int prot) 383 { 384 return (-1); 385 } 386 387 static int 388 pcdisplay_alloc_screen(void *v, const struct wsscreen_descr *type, 389 void **cookiep, int *curxp, int *curyp, long *defattrp) 390 { 391 struct pcdisplay_softc *sc = v; 392 393 if (sc->nscreens > 0) 394 return (ENOMEM); 395 396 *cookiep = sc->sc_dc; 397 *curxp = 0; 398 *curyp = 0; 399 *defattrp = FG_LIGHTGREY | BG_BLACK; 400 sc->nscreens++; 401 return (0); 402 } 403 404 static void 405 pcdisplay_free_screen(void *v, void *cookie) 406 { 407 struct pcdisplay_softc *sc = v; 408 409 if (sc->sc_dc == &pcdisplay_console_dc) 410 panic("pcdisplay_free_screen: console"); 411 412 sc->nscreens--; 413 } 414 415 static int 416 pcdisplay_show_screen(void *v, void *cookie, 417 int waitok, void (*cb)(void *, int, int), 418 void *cbarg) 419 { 420 #ifdef DIAGNOSTIC 421 struct pcdisplay_softc *sc = v; 422 423 if (cookie != sc->sc_dc) 424 panic("pcdisplay_show_screen: bad screen"); 425 #endif 426 return (0); 427 } 428 429 static int 430 pcdisplay_allocattr(void *id, int fg, int bg, 431 int flags, long *attrp) 432 { 433 if (flags & WSATTR_REVERSE) 434 *attrp = FG_BLACK | BG_LIGHTGREY; 435 else 436 *attrp = FG_LIGHTGREY | BG_BLACK; 437 return (0); 438 } 439
Indexes created Wed Sep 24 05:09:52 GMT 2025