ofb.c revision 1.60
1 /* $NetBSD: ofb.c,v 1.60 2007/07/24 20:09:57 macallan 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 1.60 2007/07/24 20:09:57 macallan 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 #include <sys/lwp.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <dev/pci/pcidevs.h> 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcivar.h> 49 #include <dev/pci/pciio.h> 50 51 #include <dev/wscons/wsconsio.h> 52 #include <dev/wscons/wsdisplayvar.h> 53 #include <dev/rasops/rasops.h> 54 #include <dev/wsfont/wsfont.h> 55 56 #include <dev/ofw/openfirm.h> 57 #include <dev/ofw/ofw_pci.h> 58 59 #include <machine/bus.h> 60 #include <machine/autoconf.h> 61 #include <machine/grfioctl.h> 62 63 #include <dev/wscons/wsdisplay_vconsvar.h> 64 65 #include <macppc/dev/ofbvar.h> 66 67 struct ofb_softc { 68 struct device sc_dev; 69 70 pci_chipset_tag_t sc_pc; 71 pcitag_t sc_pcitag; 72 bus_space_tag_t sc_memt; 73 bus_space_tag_t sc_iot; 74 75 u_int32_t sc_addrs[30]; /* "assigned-addresses" storage */ 76 u_char sc_cmap_red[256]; 77 u_char sc_cmap_green[256]; 78 u_char sc_cmap_blue[256]; 79 80 int sc_node, sc_ih, sc_mode; 81 paddr_t sc_fbaddr; 82 83 struct vcons_data vd; 84 }; 85 86 static int ofbmatch(struct device *, struct cfdata *, void *); 87 static void ofbattach(struct device *, struct device *, void *); 88 89 CFATTACH_DECL(ofb, sizeof(struct ofb_softc), 90 ofbmatch, ofbattach, NULL, NULL); 91 92 const struct wsscreen_descr *_ofb_scrlist[] = { 93 &ofb_stdscreen, 94 /* XXX other formats, graphics screen? */ 95 }; 96 97 struct wsscreen_list ofb_screenlist = { 98 sizeof(_ofb_scrlist) / sizeof(struct wsscreen_descr *), _ofb_scrlist 99 }; 100 101 static int ofb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 102 static paddr_t ofb_mmap(void *, void *, off_t, int); 103 104 static void ofb_init_screen(void *, struct vcons_screen *, int, long *); 105 106 struct wsdisplay_accessops ofb_accessops = { 107 ofb_ioctl, 108 ofb_mmap, 109 NULL, /* vcons_alloc_screen */ 110 NULL, /* vcons_free_screen */ 111 NULL, /* vcons_show_screen */ 112 NULL /* load_font */ 113 }; 114 115 static void ofb_putpalreg(struct ofb_softc *, int, uint8_t, uint8_t, 116 uint8_t); 117 118 static int ofb_getcmap(struct ofb_softc *, struct wsdisplay_cmap *); 119 static int ofb_putcmap(struct ofb_softc *, struct wsdisplay_cmap *); 120 static void ofb_init_cmap(struct ofb_softc *); 121 static int ofb_drm_print(void *, const char *); 122 123 extern const u_char rasops_cmap[768]; 124 125 extern int console_node; 126 extern int console_instance; 127 128 static int 129 ofbmatch(struct device *parent, struct cfdata *match, void *aux) 130 { 131 struct pci_attach_args *pa = aux; 132 133 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE && 134 PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL) 135 return 1; 136 137 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY) 138 return 1; 139 140 return 0; 141 } 142 143 static void 144 ofbattach(struct device *parent, struct device *self, void *aux) 145 { 146 struct ofb_softc *sc = (struct ofb_softc *)self; 147 struct pci_attach_args *pa = aux; 148 struct wsemuldisplaydev_attach_args a; 149 struct rasops_info *ri = &ofb_console_screen.scr_ri; 150 long defattr; 151 int console, node, sub; 152 char devinfo[256]; 153 154 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 155 printf(": %s\n", devinfo); 156 157 if (console_node == 0) 158 return; 159 160 node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag); 161 console = (node == console_node); 162 if (!console) { 163 /* check if any of the childs matches */ 164 sub = OF_child(node); 165 while ((sub != 0) && (sub != console_node)) { 166 sub = OF_peer(sub); 167 } 168 if (sub == console_node) { 169 console = true; 170 } 171 } 172 173 sc->sc_memt = pa->pa_memt; 174 sc->sc_iot = pa->pa_iot; 175 sc->sc_pc = pa->pa_pc; 176 sc->sc_pcitag = pa->pa_tag; 177 sc->sc_mode = WSDISPLAYIO_MODE_EMUL; 178 179 if (!console) 180 return; 181 182 vcons_init(&sc->vd, sc, &ofb_stdscreen, &ofb_accessops); 183 sc->vd.init_screen = ofb_init_screen; 184 185 sc->sc_node = console_node; 186 187 sc->sc_ih = console_instance; 188 vcons_init_screen(&sc->vd, &ofb_console_screen, 1, &defattr); 189 ofb_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC; 190 191 printf("%s: %d x %d, %dbpp\n", self->dv_xname, 192 ri->ri_width, ri->ri_height, ri->ri_depth); 193 194 sc->sc_fbaddr = 0; 195 if (OF_getprop(sc->sc_node, "address", &sc->sc_fbaddr, 4) != 4) 196 OF_interpret("frame-buffer-adr", 0, 1, &sc->sc_fbaddr); 197 if (sc->sc_fbaddr == 0) { 198 printf("%s: Unable to find the framebuffer address.\n", 199 sc->sc_dev.dv_xname); 200 return; 201 } 202 203 /* XXX */ 204 if (OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs, 205 sizeof(sc->sc_addrs)) == -1) { 206 sc->sc_node = OF_parent(sc->sc_node); 207 OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs, 208 sizeof(sc->sc_addrs)); 209 } 210 211 ofb_init_cmap(sc); 212 213 a.console = console; 214 a.scrdata = &ofb_screenlist; 215 a.accessops = &ofb_accessops; 216 a.accesscookie = &sc->vd; 217 218 config_found(self, &a, wsemuldisplaydevprint); 219 220 config_found_ia(self, "drm", aux, ofb_drm_print); 221 } 222 223 static int 224 ofb_drm_print(void *aux, const char *pnp) 225 { 226 if (pnp) 227 aprint_normal("direct rendering for %s", pnp); 228 return (UNSUPP); 229 } 230 231 static void 232 ofb_init_screen(void *cookie, struct vcons_screen *scr, 233 int existing, long *defattr) 234 { 235 struct ofb_softc *sc = cookie; 236 struct rasops_info *ri = &scr->scr_ri; 237 238 if (scr != &ofb_console_screen) { 239 ofb_init_rasops(sc->sc_node, ri); 240 } 241 } 242 243 static int 244 ofb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l) 245 { 246 struct vcons_data *vd = v; 247 struct ofb_softc *sc = vd->cookie; 248 struct wsdisplay_fbinfo *wdf; 249 struct vcons_screen *ms = vd->active; 250 struct grfinfo *gm; 251 252 switch (cmd) { 253 case WSDISPLAYIO_GTYPE: 254 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC; /* XXX ? */ 255 return 0; 256 257 case WSDISPLAYIO_GINFO: 258 /* we won't get here without any screen anyway */ 259 if (ms != NULL) { 260 wdf = (void *)data; 261 wdf->height = ms->scr_ri.ri_width; 262 wdf->width = ms->scr_ri.ri_height; 263 wdf->depth = ms->scr_ri.ri_depth; 264 wdf->cmsize = 256; 265 return 0; 266 } else 267 return ENODEV; 268 269 case WSDISPLAYIO_GETCMAP: 270 return ofb_getcmap(sc, (struct wsdisplay_cmap *)data); 271 272 case WSDISPLAYIO_PUTCMAP: 273 return ofb_putcmap(sc, (struct wsdisplay_cmap *)data); 274 275 /* XXX There are no way to know framebuffer pa from a user program. */ 276 case GRFIOCGINFO: 277 if (ms != NULL) { 278 gm = (void *)data; 279 memset(gm, 0, sizeof(struct grfinfo)); 280 gm->gd_fbaddr = (void *)sc->sc_fbaddr; 281 gm->gd_fbrowbytes = ms->scr_ri.ri_stride; 282 return 0; 283 } else 284 return ENODEV; 285 case WSDISPLAYIO_LINEBYTES: 286 { 287 *(int *)data = ms->scr_ri.ri_stride; 288 return 0; 289 } 290 case WSDISPLAYIO_SMODE: 291 { 292 int new_mode = *(int*)data; 293 if (new_mode != sc->sc_mode) 294 { 295 sc->sc_mode = new_mode; 296 if (new_mode == WSDISPLAYIO_MODE_EMUL) 297 { 298 ofb_init_cmap(sc); 299 vcons_redraw_screen(ms); 300 } 301 } 302 } 303 return 0; 304 /* PCI config read/write passthrough. */ 305 case PCI_IOC_CFGREAD: 306 case PCI_IOC_CFGWRITE: 307 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag, 308 cmd, data, flag, l)); 309 } 310 return EPASSTHROUGH; 311 } 312 313 static paddr_t 314 ofb_mmap(void *v, void *vs, off_t offset, int prot) 315 { 316 struct vcons_data *vd = v; 317 struct ofb_softc *sc = vd->cookie; 318 struct rasops_info *ri; 319 u_int32_t *ap = sc->sc_addrs; 320 struct lwp *me; 321 int i; 322 323 if (vd->active == NULL) { 324 printf("%s: no active screen.\n", sc->sc_dev.dv_xname); 325 return -1; 326 } 327 328 ri = &vd->active->scr_ri; 329 330 /* framebuffer at offset 0 */ 331 if (offset >=0 && offset < (ri->ri_stride * ri->ri_height)) 332 return sc->sc_fbaddr + offset; 333 334 /* 335 * restrict all other mappings to processes with superuser privileges 336 * or the kernel itself 337 */ 338 me = curlwp; 339 if (me != NULL) { 340 if (kauth_authorize_generic(me->l_cred, KAUTH_GENERIC_ISSUSER, 341 NULL) != 0) { 342 printf("%s: mmap() rejected.\n", sc->sc_dev.dv_xname); 343 return -1; 344 } 345 } 346 347 /* let them mmap() 0xa0000 - 0xbffff if it's not covered above */ 348 #ifdef OFB_FAKE_VGA_FB 349 if (offset >=0xa0000 && offset < 0xbffff) 350 return sc->sc_fbaddr + offset - 0xa0000; 351 #endif 352 353 /* allow to map our IO space */ 354 if ((offset >= 0xf2000000) && (offset < 0xf2800000)) { 355 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot, 356 BUS_SPACE_MAP_LINEAR); 357 } 358 359 for (i = 0; i < 6; i++) { 360 switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) { 361 case OFW_PCI_PHYS_HI_SPACE_MEM32: 362 if (offset >= ap[2] && offset < ap[2] + ap[4]) 363 return bus_space_mmap(sc->sc_memt, offset, 0, 364 prot, BUS_SPACE_MAP_LINEAR); 365 } 366 ap += 5; 367 } 368 369 return -1; 370 } 371 372 static int 373 ofb_getcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm) 374 { 375 u_int index = cm->index; 376 u_int count = cm->count; 377 int error; 378 379 if (index >= 256 || count > 256 || index + count > 256) 380 return EINVAL; 381 382 error = copyout(&sc->sc_cmap_red[index], cm->red, count); 383 if (error) 384 return error; 385 error = copyout(&sc->sc_cmap_green[index], cm->green, count); 386 if (error) 387 return error; 388 error = copyout(&sc->sc_cmap_blue[index], cm->blue, count); 389 if (error) 390 return error; 391 392 return 0; 393 } 394 395 int 396 ofb_putcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm) 397 { 398 u_int index = cm->index; 399 u_int count = cm->count; 400 int i, error; 401 u_char rbuf[256], gbuf[256], bbuf[256]; 402 u_char *r, *g, *b; 403 404 if (cm->index >= 256 || cm->count > 256 || 405 (cm->index + cm->count) > 256) 406 return EINVAL; 407 error = copyin(cm->red, &rbuf[index], count); 408 if (error) 409 return error; 410 error = copyin(cm->green, &gbuf[index], count); 411 if (error) 412 return error; 413 error = copyin(cm->blue, &bbuf[index], count); 414 if (error) 415 return error; 416 417 memcpy(&sc->sc_cmap_red[index], &rbuf[index], count); 418 memcpy(&sc->sc_cmap_green[index], &gbuf[index], count); 419 memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count); 420 421 r = &sc->sc_cmap_red[index]; 422 g = &sc->sc_cmap_green[index]; 423 b = &sc->sc_cmap_blue[index]; 424 for (i = 0; i < count; i++) { 425 OF_call_method_1("color!", sc->sc_ih, 4, *r, *g, *b, index); 426 r++, g++, b++, index++; 427 } 428 return 0; 429 } 430 431 static void 432 ofb_putpalreg(struct ofb_softc *sc, int idx, uint8_t r, uint8_t g, uint8_t b) 433 { 434 if ((idx<0) || (idx > 255)) 435 return; 436 if (sc != NULL) { 437 OF_call_method_1("color!", sc->sc_ih, 4, r, g, b, idx); 438 sc->sc_cmap_red[idx] = r; 439 sc->sc_cmap_green[idx] = g; 440 sc->sc_cmap_blue[idx] = b; 441 } else { 442 OF_call_method_1("color!", console_instance, 4, r, g, b, idx); 443 } 444 } 445 446 static void 447 ofb_init_cmap(struct ofb_softc *sc) 448 { 449 int idx, i; 450 /* mess with the palette only when we're running in 8 bit */ 451 if (ofb_console_screen.scr_ri.ri_depth == 8) { 452 idx = 0; 453 for (i = 0; i < 256; i++) { 454 ofb_putpalreg(sc, i, rasops_cmap[(i * 3) + 0], 455 rasops_cmap[(i * 3) + 1], 456 rasops_cmap[(i * 3) + 2]); 457 } 458 } 459 } 460
Indexes created Mon Sep 29 15:09:53 GMT 2025