1 /* $OpenBSD: pcdisplay.c,v 1.11 2010/08/28 12:48:14 miod Exp $ */ 2 /* $NetBSD: pcdisplay.c,v 1.9.4.1 2000/06/30 16:27:48 simonb Exp $ */ 3 4 /* 5 * Copyright (c) 1998 6 * Matthias Drochner. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/device.h> 34 #include <sys/malloc.h> 35 #include <machine/bus.h> 36 37 #include <dev/isa/isavar.h> 38 #include <dev/isa/isareg.h> 39 40 #include <dev/ic/mc6845reg.h> 41 #include <dev/ic/pcdisplayvar.h> 42 #include <dev/isa/pcdisplayvar.h> 43 44 #include <dev/ic/pcdisplay.h> 45 46 #include <dev/wscons/wsconsio.h> 47 #include <dev/wscons/wsdisplayvar.h> 48 49 struct pcdisplay_config { 50 struct pcdisplayscreen pcs; 51 struct pcdisplay_handle dc_ph; 52 int mono; 53 }; 54 55 struct pcdisplay_softc { 56 struct device sc_dev; 57 struct pcdisplay_config *sc_dc; 58 int nscreens; 59 }; 60 61 static int pcdisplayconsole, pcdisplay_console_attached; 62 static struct pcdisplay_config pcdisplay_console_dc; 63 64 int pcdisplay_match(struct device *, void *, void *); 65 void pcdisplay_attach(struct device *, struct device *, void *); 66 67 static int pcdisplay_is_console(bus_space_tag_t); 68 static int pcdisplay_probe_col(bus_space_tag_t, bus_space_tag_t); 69 static int pcdisplay_probe_mono(bus_space_tag_t, bus_space_tag_t); 70 static void pcdisplay_init(struct pcdisplay_config *, 71 bus_space_tag_t, bus_space_tag_t, 72 int); 73 static int pcdisplay_alloc_attr(void *, int, int, int, long *); 74 static void pcdisplay_unpack_attr(void *, long, int *, int *, int *); 75 76 struct cfattach pcdisplay_ca = { 77 sizeof(struct pcdisplay_softc), pcdisplay_match, pcdisplay_attach, 78 }; 79 80 const struct wsdisplay_emulops pcdisplay_emulops = { 81 pcdisplay_cursor, 82 pcdisplay_mapchar, 83 pcdisplay_putchar, 84 pcdisplay_copycols, 85 pcdisplay_erasecols, 86 pcdisplay_copyrows, 87 pcdisplay_eraserows, 88 pcdisplay_alloc_attr, 89 pcdisplay_unpack_attr 90 }; 91 92 const struct wsscreen_descr pcdisplay_scr = { 93 "80x25", 80, 25, 94 &pcdisplay_emulops, 95 0, 0, /* no font support */ 96 WSSCREEN_REVERSE /* that's minimal... */ 97 }; 98 99 const struct wsscreen_descr *_pcdisplay_scrlist[] = { 100 &pcdisplay_scr, 101 }; 102 103 const struct wsscreen_list pcdisplay_screenlist = { 104 sizeof(_pcdisplay_scrlist) / sizeof(struct wsscreen_descr *), 105 _pcdisplay_scrlist 106 }; 107 108 static int pcdisplay_ioctl(void *, u_long, caddr_t, int, struct proc *); 109 static paddr_t pcdisplay_mmap(void *, off_t, int); 110 static int pcdisplay_alloc_screen(void *, const struct wsscreen_descr *, 111 void **, int *, int *, long *); 112 static void pcdisplay_free_screen(void *, void *); 113 static int pcdisplay_show_screen(void *, void *, int, 114 void (*) (void *, int, int), void *); 115 116 const struct wsdisplay_accessops pcdisplay_accessops = { 117 pcdisplay_ioctl, 118 pcdisplay_mmap, 119 pcdisplay_alloc_screen, 120 pcdisplay_free_screen, 121 pcdisplay_show_screen, 122 0 /* load_font */ 123 }; 124 125 static int 126 pcdisplay_probe_col(bus_space_tag_t iot, bus_space_tag_t memt) 127 { 128 bus_space_handle_t memh, ioh_6845; 129 u_int16_t oldval, val; 130 131 if (bus_space_map(memt, 0xb8000, 0x8000, 0, &memh)) 132 return (0); 133 oldval = bus_space_read_2(memt, memh, 0); 134 bus_space_write_2(memt, memh, 0, 0xa55a); 135 val = bus_space_read_2(memt, memh, 0); 136 bus_space_write_2(memt, memh, 0, oldval); 137 bus_space_unmap(memt, memh, 0x8000); 138 if (val != 0xa55a) 139 return (0); 140 141 if (bus_space_map(iot, 0x3d0, 0x10, 0, &ioh_6845)) 142 return (0); 143 bus_space_unmap(iot, ioh_6845, 0x10); 144 145 return (1); 146 } 147 148 static int 149 pcdisplay_probe_mono(bus_space_tag_t iot, bus_space_tag_t memt) 150 { 151 bus_space_handle_t memh, ioh_6845; 152 u_int16_t oldval, val; 153 154 if (bus_space_map(memt, 0xb0000, 0x8000, 0, &memh)) 155 return (0); 156 oldval = bus_space_read_2(memt, memh, 0); 157 bus_space_write_2(memt, memh, 0, 0xa55a); 158 val = bus_space_read_2(memt, memh, 0); 159 bus_space_write_2(memt, memh, 0, oldval); 160 bus_space_unmap(memt, memh, 0x8000); 161 if (val != 0xa55a) 162 return (0); 163 164 if (bus_space_map(iot, 0x3b0, 0x10, 0, &ioh_6845)) 165 return (0); 166 bus_space_unmap(iot, ioh_6845, 0x10); 167 168 return (1); 169 } 170 171 static void 172 pcdisplay_init(struct pcdisplay_config *dc, bus_space_tag_t iot, 173 bus_space_tag_t memt, int mono) 174 { 175 struct pcdisplay_handle *ph = &dc->dc_ph; 176 int cpos; 177 178 ph->ph_iot = iot; 179 ph->ph_memt = memt; 180 dc->mono = mono; 181 182 if (bus_space_map(memt, mono ? 0xb0000 : 0xb8000, 0x8000, 183 0, &ph->ph_memh)) 184 panic("pcdisplay_init: can't map mem space"); 185 if (bus_space_map(iot, mono ? 0x3b0 : 0x3d0, 0x10, 186 0, &ph->ph_ioh_6845)) 187 panic("pcdisplay_init: can't map i/o space"); 188 189 /* 190 * initialize the only screen 191 */ 192 dc->pcs.hdl = ph; 193 dc->pcs.type = &pcdisplay_scr; 194 dc->pcs.active = 1; 195 dc->pcs.mem = NULL; 196 197 cpos = pcdisplay_6845_read(ph, cursorh) << 8; 198 cpos |= pcdisplay_6845_read(ph, cursorl); 199 200 /* make sure we have a valid cursor position */ 201 if (cpos < 0 || cpos >= pcdisplay_scr.nrows * pcdisplay_scr.ncols) 202 cpos = 0; 203 204 dc->pcs.dispoffset = 0; 205 dc->pcs.visibleoffset = 0; 206 207 dc->pcs.vc_crow = cpos / pcdisplay_scr.ncols; 208 dc->pcs.vc_ccol = cpos % pcdisplay_scr.ncols; 209 pcdisplay_cursor_init(&dc->pcs, 1); 210 } 211 212 int 213 pcdisplay_match(struct device *parent, void *match, void *aux) 214 { 215 struct isa_attach_args *ia = aux; 216 int mono; 217 218 /* If values are hardwired to something that they can't be, punt. */ 219 if ((ia->ia_iobase != IOBASEUNK && 220 ia->ia_iobase != 0x3d0 && 221 ia->ia_iobase != 0x3b0) || 222 /* ia->ia_iosize != 0 || XXX isa.c */ 223 (ia->ia_maddr != MADDRUNK && 224 ia->ia_maddr != 0xb8000 && 225 ia->ia_maddr != 0xb0000) || 226 (ia->ia_msize != 0 && ia->ia_msize != 0x8000) || 227 ia->ia_irq != IRQUNK || ia->ia_drq != DRQUNK) 228 return (0); 229 230 if (pcdisplay_is_console(ia->ia_iot)) 231 mono = pcdisplay_console_dc.mono; 232 else if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 && 233 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 234 mono = 0; 235 else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 && 236 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 237 mono = 1; 238 else 239 return (0); 240 241 ia->ia_iobase = mono ? 0x3b0 : 0x3d0; 242 ia->ia_iosize = 0x10; 243 ia->ia_maddr = mono ? 0xb0000 : 0xb8000; 244 ia->ia_msize = 0x8000; 245 return (1); 246 } 247 248 void 249 pcdisplay_attach(struct device *parent, struct device *self, void *aux) 250 { 251 struct isa_attach_args *ia = aux; 252 struct pcdisplay_softc *sc = (struct pcdisplay_softc *)self; 253 int console; 254 struct pcdisplay_config *dc; 255 struct wsemuldisplaydev_attach_args aa; 256 257 printf("\n"); 258 259 console = pcdisplay_is_console(ia->ia_iot); 260 261 if (console) { 262 dc = &pcdisplay_console_dc; 263 sc->nscreens = 1; 264 pcdisplay_console_attached = 1; 265 } else { 266 dc = malloc(sizeof(struct pcdisplay_config), 267 M_DEVBUF, M_WAITOK); 268 if (ia->ia_iobase != 0x3b0 && ia->ia_maddr != 0xb0000 && 269 pcdisplay_probe_col(ia->ia_iot, ia->ia_memt)) 270 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 0); 271 else if (ia->ia_iobase != 0x3d0 && ia->ia_maddr != 0xb8000 && 272 pcdisplay_probe_mono(ia->ia_iot, ia->ia_memt)) 273 pcdisplay_init(dc, ia->ia_iot, ia->ia_memt, 1); 274 else 275 panic("pcdisplay_attach: display disappeared"); 276 } 277 sc->sc_dc = dc; 278 279 aa.console = console; 280 aa.scrdata = &pcdisplay_screenlist; 281 aa.accessops = &pcdisplay_accessops; 282 aa.accesscookie = sc; 283 aa.defaultscreens = 0; 284 285 config_found(self, &aa, wsemuldisplaydevprint); 286 } 287 288 289 int 290 pcdisplay_cnattach(bus_space_tag_t iot, bus_space_tag_t memt) 291 { 292 int mono; 293 294 if (pcdisplay_probe_col(iot, memt)) 295 mono = 0; 296 else if (pcdisplay_probe_mono(iot, memt)) 297 mono = 1; 298 else 299 return (ENXIO); 300 301 pcdisplay_init(&pcdisplay_console_dc, iot, memt, mono); 302 303 wsdisplay_cnattach(&pcdisplay_scr, &pcdisplay_console_dc, 304 pcdisplay_console_dc.pcs.vc_ccol, 305 pcdisplay_console_dc.pcs.vc_crow, 306 FG_LIGHTGREY | BG_BLACK); 307 308 pcdisplayconsole = 1; 309 return (0); 310 } 311 312 static int 313 pcdisplay_is_console(bus_space_tag_t iot) 314 { 315 if (pcdisplayconsole && 316 !pcdisplay_console_attached && 317 iot == pcdisplay_console_dc.dc_ph.ph_iot) 318 return (1); 319 return (0); 320 } 321 322 static int 323 pcdisplay_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p) 324 { 325 /* 326 * XXX "do something!" 327 */ 328 return (-1); 329 } 330 331 static paddr_t 332 pcdisplay_mmap(void *v, off_t offset, int prot) 333 { 334 return (-1); 335 } 336 337 static int 338 pcdisplay_alloc_screen(void *v, const struct wsscreen_descr *type, 339 void **cookiep, int *curxp, int *curyp, long *defattrp) 340 { 341 struct pcdisplay_softc *sc = v; 342 343 if (sc->nscreens > 0) 344 return (ENOMEM); 345 346 *cookiep = sc->sc_dc; 347 *curxp = 0; 348 *curyp = 0; 349 *defattrp = FG_LIGHTGREY | BG_BLACK; 350 sc->nscreens++; 351 return (0); 352 } 353 354 static void 355 pcdisplay_free_screen(void *v, void *cookie) 356 { 357 struct pcdisplay_softc *sc = v; 358 359 if (sc->sc_dc == &pcdisplay_console_dc) 360 panic("pcdisplay_free_screen: console"); 361 362 sc->nscreens--; 363 } 364 365 static int 366 pcdisplay_show_screen(void *v, void *cookie, int waitok, 367 void (*cb)(void *, int, int), void *cbarg) 368 { 369 #ifdef DIAGNOSTIC 370 struct pcdisplay_softc *sc = v; 371 372 if (cookie != sc->sc_dc) 373 panic("pcdisplay_show_screen: bad screen"); 374 #endif 375 return (0); 376 } 377 378 static int 379 pcdisplay_alloc_attr(void *id, int fg, int bg, int flags, long *attrp) 380 { 381 if (flags & WSATTR_REVERSE) 382 *attrp = FG_BLACK | BG_LIGHTGREY; 383 else 384 *attrp = FG_LIGHTGREY | BG_BLACK; 385 return (0); 386 } 387 388 static void 389 pcdisplay_unpack_attr(void *id, long attr, int *fg, int *bg, int *ul) 390 { 391 if (attr == (FG_BLACK | BG_LIGHTGREY)) { 392 *fg = WSCOL_BLACK; 393 *bg = WSCOL_WHITE; 394 } else { 395 *fg = WSCOL_WHITE; 396 *bg = WSCOL_BLACK; 397 } 398 if (ul != NULL) 399 *ul = 0; 400 } 401 402 struct cfdriver pcdisplay_cd = { 403 NULL, "pcdisplay", DV_DULL 404 }; 405