pcdisplay.c revision 1.43.2.1
1 /* $NetBSD: pcdisplay.c,v 1.43.2.1 2020/04/08 14:08:07 martin 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 1.43.2.1 2020/04/08 14:08:07 martin 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 pcdisplay_config *sc_dc; 64 int nscreens; 65 #if NPCWEASEL > 0 66 struct weasel_handle sc_weasel; 67 #endif 68 }; 69 70 static int pcdisplayconsole, pcdisplay_console_attached; 71 static struct pcdisplay_config pcdisplay_console_dc; 72 73 int pcdisplay_match(device_t, cfdata_t, void *); 74 void pcdisplay_attach(device_t, device_t, void *); 75 76 static int pcdisplay_is_console(bus_space_tag_t); 77 static int pcdisplay_probe_col(bus_space_tag_t, bus_space_tag_t); 78 static int pcdisplay_probe_mono(bus_space_tag_t, bus_space_tag_t); 79 static void pcdisplay_init(struct pcdisplay_config *, 80 bus_space_tag_t, bus_space_tag_t, 81 int); 82 static int pcdisplay_allocattr(void *, int, int, int, long *); 83 84 CFATTACH_DECL_NEW(pcdisplay, sizeof(struct pcdisplay_softc), 85 pcdisplay_match, pcdisplay_attach, NULL, NULL); 86 87 const struct wsdisplay_emulops pcdisplay_emulops = { 88 pcdisplay_cursor, 89 pcdisplay_mapchar, 90 pcdisplay_putchar, 91 pcdisplay_copycols, 92 pcdisplay_erasecols, 93 pcdisplay_copyrows, 94 pcdisplay_eraserows, 95 pcdisplay_allocattr, 96 NULL, /* replaceattr */ 97 }; 98 99 const struct wsscreen_descr pcdisplay_scr = { 100 "80x25", 80, 25, 101 &pcdisplay_emulops, 102 0, 0, /* no font support */ 103 WSSCREEN_REVERSE, /* that's minimal... */ 104 NULL, /* modecookie */ 105 }; 106 107 const struct wsscreen_descr *_pcdisplay_scrlist[] = { 108 &pcdisplay_scr, 109 }; 110 111 const struct wsscreen_list pcdisplay_screenlist = { 112 sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *), 113 _pcdisplay_scrlist 114 }; 115 116 static int pcdisplay_ioctl(void *, void *, u_long, void *, int, struct lwp *); 117 static paddr_t pcdisplay_mmap(void *, void *, off_t, int); 118 static int pcdisplay_alloc_screen(void *, const struct wsscreen_descr *, 119 void **, int *, int *, long *); 120 static void pcdisplay_free_screen(void *, void *); 121 static int pcdisplay_show_screen(void *, void *, int, 122 void (*) (void *, int, int), void *); 123 124 const struct wsdisplay_accessops pcdisplay_accessops = { 125 pcdisplay_ioctl, 126 pcdisplay_mmap, 127 pcdisplay_alloc_screen, 128 pcdisplay_free_screen, 129 pcdisplay_show_screen, 130 NULL, /* load_font */ 131 NULL, /* pollc */ 132 NULL, /* scroll */ 133 }; 134 135 static int 136 pcdisplay_probe_col(bus_space_tag_t iot, bus_space_tag_t memt) 137 { 138 bus_space_handle_t memh, ioh_6845; 139 u_int16_t oldval, val; 140 141 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 142 return (0); 143 oldval = bus_space_read_2(memt, memh, 0); 144 bus_space_write_2(memt, memh, 0, 0xa55a); 145 val = bus_space_read_2(memt, memh, 0); 146 bus_space_write_2(memt, memh, 0, oldval); 147 bus_space_unmap(memt, memh, 0x8000); 148 if (val != 0xa55a) 149 return (0); 150 151 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 152 return (0); 153 bus_space_unmap(iot, ioh_6845, 0x10); 154 155 return (1); 156 } 157 158 static int 159 pcdisplay_probe_mono(bus_space_tag_t iot, bus_space_tag_t memt) 160 { 161 bus_space_handle_t memh, ioh_6845; 162 u_int16_t oldval, val; 163 164 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 165 return (0); 166 oldval = bus_space_read_2(memt, memh, 0); 167 bus_space_write_2(memt, memh, 0, 0xa55a); 168 val = bus_space_read_2(memt, memh, 0); 169 bus_space_write_2(memt, memh, 0, oldval); 170 bus_space_unmap(memt, memh, 0x8000); 171 if (val != 0xa55a) 172 return (0); 173 174 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 175 return (0); 176 bus_space_unmap(iot, ioh_6845, 0x10); 177 178 return (1); 179 } 180 181 static void 182 pcdisplay_init(struct pcdisplay_config *dc, bus_space_tag_t iot, 183 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 BUS_SPACE_MAP_CACHEABLE | BUS_SPACE_MAP_PREFETCHABLE, 194 &ph->ph_memh)) 195 panic("pcdisplay_init: cannot map memory"); 196 if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 197 0, &ph->ph_ioh_6845)) 198 panic("pcdisplay_init: cannot map io"); 199 200 /* 201 * initialize the only screen 202 */ 203 dc->pcs.hdl = ph; 204 dc->pcs.type = &pcdisplay_scr; 205 dc->pcs.active = 1; 206 dc->pcs.mem = NULL; 207 208 cpos = pcdisplay_6845_read(ph, cursorh) << 8; 209 cpos |= pcdisplay_6845_read(ph, cursorl); 210 211 /* make sure we have a valid cursor position */ 212 if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) 213 cpos = 0; 214 215 dc->pcs.dispoffset = 0; 216 217 dc->pcs.cursorrow = cpos / pcdisplay_scr.ncols; 218 dc->pcs.cursorcol = cpos % pcdisplay_scr.ncols; 219 pcdisplay_cursor_init(&dc->pcs, 1); 220 } 221 222 int 223 pcdisplay_match(device_t parent, cfdata_t match, 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_addr = 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(device_t parent, device_t self, void *aux) 284 { 285 struct isa_attach_args *ia = aux; 286 struct pcdisplay_softc *sc = device_private(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 = self; 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 bus_space_is_equal(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, int prot) 382 { 383 return (-1); 384 } 385 386 static int 387 pcdisplay_alloc_screen(void *v, const struct wsscreen_descr *type, 388 void **cookiep, int *curxp, int *curyp, long *defattrp) 389 { 390 struct pcdisplay_softc *sc = v; 391 392 if (sc->nscreens > 0) 393 return (ENOMEM); 394 395 *cookiep = sc->sc_dc; 396 *curxp = 0; 397 *curyp = 0; 398 *defattrp = FG_LIGHTGREY | BG_BLACK; 399 sc->nscreens++; 400 return (0); 401 } 402 403 static void 404 pcdisplay_free_screen(void *v, void *cookie) 405 { 406 struct pcdisplay_softc *sc = v; 407 408 if (sc->sc_dc == &pcdisplay_console_dc) 409 panic("pcdisplay_free_screen: console"); 410 411 sc->nscreens--; 412 } 413 414 static int 415 pcdisplay_show_screen(void *v, void *cookie, int waitok, 416 void (*cb)(void *, int, int), void *cbarg) 417 { 418 #ifdef DIAGNOSTIC 419 struct pcdisplay_softc *sc = v; 420 421 if (cookie != sc->sc_dc) 422 panic("pcdisplay_show_screen: bad screen"); 423 #endif 424 return (0); 425 } 426 427 static int 428 pcdisplay_allocattr(void *id, int fg, int bg, int flags, long *attrp) 429 { 430 if (flags & WSATTR_REVERSE) 431 *attrp = FG_BLACK | BG_LIGHTGREY; 432 else 433 *attrp = FG_LIGHTGREY | BG_BLACK; 434 return (0); 435 } 436
Indexes created Wed Oct 15 16:09:53 GMT 2025