ofb.c revision 1.56
1 /* $NetBSD: ofb.c,v 1.56 2007/03/04 06:00:10 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: ofb.c,v 1.56 2007/03/04 06:00:10 christos Exp $"); 32 33 #include <sys/param.h> 34 #include <sys/buf.h> 35 #include <sys/conf.h> 36 #include <sys/device.h> 37 #include <sys/ioctl.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/systm.h> 41 #include <sys/kauth.h> 42 43 #include <uvm/uvm_extern.h> 44 45 #include <dev/pci/pcidevs.h> 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/pcivar.h> 48 #include <dev/pci/pciio.h> 49 50 #include <dev/wscons/wsconsio.h> 51 #include <dev/wscons/wsdisplayvar.h> 52 #include <dev/rasops/rasops.h> 53 #include <dev/wsfont/wsfont.h> 54 55 #include <dev/ofw/openfirm.h> 56 #include <dev/ofw/ofw_pci.h> 57 58 #include <machine/bus.h> 59 #include <machine/autoconf.h> 60 #include <machine/grfioctl.h> 61 62 #include <dev/wscons/wsdisplay_vconsvar.h> 63 64 #include <macppc/dev/ofbvar.h> 65 66 struct ofb_softc { 67 struct device sc_dev; 68 69 pci_chipset_tag_t sc_pc; 70 pcitag_t sc_pcitag; 71 bus_space_tag_t sc_memt; 72 bus_space_tag_t sc_iot; 73 74 u_int32_t sc_addrs[30]; /* "assigned-addresses" storage */ 75 u_char sc_cmap_red[256]; 76 u_char sc_cmap_green[256]; 77 u_char sc_cmap_blue[256]; 78 79 int sc_node, sc_ih, sc_mode; 80 paddr_t sc_fbaddr; 81 82 struct vcons_data vd; 83 }; 84 85 static int ofbmatch(struct device *, struct cfdata *, void *); 86 static void ofbattach(struct device *, struct device *, void *); 87 88 CFATTACH_DECL(ofb, sizeof(struct ofb_softc), 89 ofbmatch, ofbattach, NULL, NULL); 90 91 const struct wsscreen_descr *_ofb_scrlist[] = { 92 &ofb_stdscreen, 93 /* XXX other formats, graphics screen? */ 94 }; 95 96 struct wsscreen_list ofb_screenlist = { 97 sizeof(_ofb_scrlist) / sizeof(struct wsscreen_descr *), _ofb_scrlist 98 }; 99 100 static int ofb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 101 static paddr_t ofb_mmap(void *, void *, off_t, int); 102 103 static void ofb_init_screen(void *, struct vcons_screen *, int, long *); 104 105 struct wsdisplay_accessops ofb_accessops = { 106 ofb_ioctl, 107 ofb_mmap, 108 NULL, /* vcons_alloc_screen */ 109 NULL, /* vcons_free_screen */ 110 NULL, /* vcons_show_screen */ 111 NULL /* load_font */ 112 }; 113 114 static void ofb_putpalreg(struct ofb_softc *, int, uint8_t, uint8_t, 115 uint8_t); 116 117 static int ofb_getcmap(struct ofb_softc *, struct wsdisplay_cmap *); 118 static int ofb_putcmap(struct ofb_softc *, struct wsdisplay_cmap *); 119 static void ofb_init_cmap(struct ofb_softc *); 120 121 extern const u_char rasops_cmap[768]; 122 123 extern int console_node; 124 extern int console_instance; 125 126 static int 127 ofbmatch(struct device *parent, struct cfdata *match, void *aux) 128 { 129 struct pci_attach_args *pa = aux; 130 131 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 132 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) 133 return 1; 134 135 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) 136 return 1; 137 138 return 0; 139 } 140 141 static void 142 ofbattach(struct device *parent, struct device *self, void *aux) 143 { 144 struct ofb_softc *sc = (struct ofb_softc *)self; 145 struct pci_attach_args *pa = aux; 146 struct wsemuldisplaydev_attach_args a; 147 struct rasops_info *ri = &ofb_console_screen.scr_ri; 148 long defattr; 149 int console, node, sub; 150 char devinfo[256]; 151 152 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 153 printf(": %s\n", devinfo); 154 155 if (console_node == 0) 156 return; 157 158 node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag); 159 console = (node == console_node); 160 if (!console) { 161 /* check if any of the childs matches */ 162 sub = OF_child(node); 163 while ((sub != 0) && (sub != console_node)) { 164 sub = OF_peer(sub); 165 } 166 if (sub == console_node) { 167 console = true; 168 } 169 } 170 171 sc->sc_memt = pa->pa_memt; 172 sc->sc_iot = pa->pa_iot; 173 sc->sc_pc = pa->pa_pc; 174 sc->sc_pcitag = pa->pa_tag; 175 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 176 177 if (!console) 178 return; 179 180 vcons_init(&sc->vd, sc, &ofb_stdscreen, &ofb_accessops); 181 sc->vd.init_screen = ofb_init_screen; 182 183 sc->sc_node = console_node; 184 185 sc->sc_ih = console_instance; 186 vcons_init_screen(&sc->vd, &ofb_console_screen, 1, &defattr); 187 ofb_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 188 189 printf("%s: %d x %d, %dbpp\n", self->dv_xname, 190 ri->ri_width, ri->ri_height, ri->ri_depth); 191 192 sc->sc_fbaddr = 0; 193 if (OF_getprop(sc->sc_node, "address", &sc->sc_fbaddr, 4) != 4) 194 OF_interpret("frame-buffer-adr", 1, 1, &sc->sc_fbaddr); 195 if (sc->sc_fbaddr == 0) { 196 printf("%s: Unable to find the framebuffer address.\n", 197 sc->sc_dev.dv_xname); 198 return; 199 } 200 201 /* XXX */ 202 if (OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs, 203 sizeof(sc->sc_addrs)) == -1) { 204 sc->sc_node = OF_parent(sc->sc_node); 205 OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs, 206 sizeof(sc->sc_addrs)); 207 } 208 209 ofb_init_cmap(sc); 210 211 a.console = console; 212 a.scrdata = &ofb_screenlist; 213 a.accessops = &ofb_accessops; 214 a.accesscookie = &sc->vd; 215 216 config_found(self, &a, wsemuldisplaydevprint); 217 } 218 219 static void 220 ofb_init_screen(void *cookie, struct vcons_screen *scr, 221 int existing, long *defattr) 222 { 223 struct ofb_softc *sc = cookie; 224 struct rasops_info *ri = &scr->scr_ri; 225 226 if (scr != &ofb_console_screen) { 227 ofb_init_rasops(sc->sc_node, ri); 228 } 229 } 230 231 static int 232 ofb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l) 233 { 234 struct vcons_data *vd = v; 235 struct ofb_softc *sc = vd->cookie; 236 struct wsdisplay_fbinfo *wdf; 237 struct vcons_screen *ms = vd->active; 238 struct grfinfo *gm; 239 240 switch (cmd) { 241 case WSDISPLAYIO_GTYPE: 242 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; /* XXX ? */ 243 return 0; 244 245 case WSDISPLAYIO_GINFO: 246 /* we won't get here without any screen anyway */ 247 if (ms != NULL) { 248 wdf = (void *)data; 249 wdf->height = ms->scr_ri.ri_width; 250 wdf->width = ms->scr_ri.ri_height; 251 wdf->depth = ms->scr_ri.ri_depth; 252 wdf->cmsize = 256; 253 return 0; 254 } else 255 return ENODEV; 256 257 case WSDISPLAYIO_GETCMAP: 258 return ofb_getcmap(sc, (struct wsdisplay_cmap *)data); 259 260 case WSDISPLAYIO_PUTCMAP: 261 return ofb_putcmap(sc, (struct wsdisplay_cmap *)data); 262 263 /* XXX There are no way to know framebuffer pa from a user program. */ 264 case GRFIOCGINFO: 265 if (ms != NULL) { 266 gm = (void *)data; 267 memset(gm, 0, sizeof(struct grfinfo)); 268 gm->gd_fbaddr = (void *)sc->sc_fbaddr; 269 gm->gd_fbrowbytes = ms->scr_ri.ri_stride; 270 return 0; 271 } else 272 return ENODEV; 273 case WSDISPLAYIO_SMODE: 274 { 275 int new_mode = *(int*)data; 276 if (new_mode != sc->sc_mode) 277 { 278 sc->sc_mode = new_mode; 279 if (new_mode == WSDISPLAYIO_MODE_EMUL) 280 { 281 ofb_init_cmap(sc); 282 vcons_redraw_screen(ms); 283 } 284 } 285 } 286 return 0; 287 /* PCI config read/write passthrough. */ 288 case PCI_IOC_CFGREAD: 289 case PCI_IOC_CFGWRITE: 290 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, 291 cmd, data, flag, l)); 292 } 293 return EPASSTHROUGH; 294 } 295 296 static paddr_t 297 ofb_mmap(void *v, void *vs, off_t offset, int prot) 298 { 299 struct vcons_data *vd = v; 300 struct ofb_softc *sc = vd->cookie; 301 struct rasops_info *ri; 302 u_int32_t *ap = sc->sc_addrs; 303 struct lwp *me; 304 int i; 305 306 if (vd->active == NULL) { 307 printf("%s: no active screen.\n", sc->sc_dev.dv_xname); 308 return -1; 309 } 310 311 ri = &vd->active->scr_ri; 312 313 /* framebuffer at offset 0 */ 314 if (offset >=0 && offset < (ri->ri_stride * ri->ri_height)) 315 return sc->sc_fbaddr + offset; 316 317 /* 318 * restrict all other mappings to processes with superuser privileges 319 * or the kernel itself 320 */ 321 me = curlwp; 322 if (me != NULL) { 323 if (kauth_authorize_generic(me->l_cred, KAUTH_GENERIC_ISSUSER, 324 NULL) != 0) { 325 printf("%s: mmap() rejected.\n", sc->sc_dev.dv_xname); 326 return -1; 327 } 328 } 329 330 /* let them mmap() 0xa0000 - 0xbffff if it's not covered above */ 331 #ifdef OFB_FAKE_VGA_FB 332 if (offset >=0xa0000 && offset < 0xbffff) 333 return sc->sc_fbaddr + offset - 0xa0000; 334 #endif 335 336 /* allow to map our IO space */ 337 if ((offset >= 0xf2000000) && (offset < 0xf2800000)) { 338 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot, 339 BUS_SPACE_MAP_LINEAR); 340 } 341 342 for (i = 0; i < 6; i++) { 343 switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) { 344 case OFW_PCI_PHYS_HI_SPACE_MEM32: 345 if (offset >= ap[2] && offset < ap[2] + ap[4]) 346 return bus_space_mmap(sc->sc_memt, offset, 0, 347 prot, BUS_SPACE_MAP_LINEAR); 348 } 349 ap += 5; 350 } 351 352 return -1; 353 } 354 355 static int 356 ofb_getcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm) 357 { 358 u_int index = cm->index; 359 u_int count = cm->count; 360 int error; 361 362 if (index >= 256 || count > 256 || index + count > 256) 363 return EINVAL; 364 365 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 366 if (error) 367 return error; 368 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 369 if (error) 370 return error; 371 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 372 if (error) 373 return error; 374 375 return 0; 376 } 377 378 int 379 ofb_putcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm) 380 { 381 u_int index = cm->index; 382 u_int count = cm->count; 383 int i, error; 384 u_char rbuf[256], gbuf[256], bbuf[256]; 385 u_char *r, *g, *b; 386 387 if (cm->index >= 256 || cm->count > 256 || 388 (cm->index + cm->count) > 256) 389 return EINVAL; 390 error = copyin(cm->red, &rbuf[index], count); 391 if (error) 392 return error; 393 error = copyin(cm->green, &gbuf[index], count); 394 if (error) 395 return error; 396 error = copyin(cm->blue, &bbuf[index], count); 397 if (error) 398 return error; 399 400 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 401 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 402 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 403 404 r = &sc->sc_cmap_red[index]; 405 g = &sc->sc_cmap_green[index]; 406 b = &sc->sc_cmap_blue[index]; 407 for (i = 0; i < count; i++) { 408 OF_call_method_1("color!", sc->sc_ih, 4, *r, *g, *b, index); 409 r++, g++, b++, index++; 410 } 411 return 0; 412 } 413 414 static void 415 ofb_putpalreg(struct ofb_softc *sc, int idx, uint8_t r, uint8_t g, uint8_t b) 416 { 417 if ((idx<0) || (idx > 255)) 418 return; 419 if (sc != NULL) { 420 OF_call_method_1("color!", sc->sc_ih, 4, r, g, b, idx); 421 sc->sc_cmap_red[idx] = r; 422 sc->sc_cmap_green[idx] = g; 423 sc->sc_cmap_blue[idx] = b; 424 } else { 425 OF_call_method_1("color!", console_instance, 4, r, g, b, idx); 426 } 427 } 428 429 static void 430 ofb_init_cmap(struct ofb_softc *sc) 431 { 432 int idx, i; 433 /* mess with the palette only when we're running in 8 bit */ 434 if (ofb_console_screen.scr_ri.ri_depth == 8) { 435 idx = 0; 436 for (i = 0; i < 256; i++) { 437 ofb_putpalreg(sc, i, rasops_cmap[(i * 3) + 0], 438 rasops_cmap[(i * 3) + 1], 439 rasops_cmap[(i * 3) + 2]); 440 } 441 } 442 } 443
Indexes created Sun Sep 28 16:09:52 GMT 2025