sys/arch/macppc/dev/ofb.c

   1 /*      $NetBSD: ofb.c,v 1.63 2007/11/26 19:58:29 garbled 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@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 1.63 2007/11/26 19:58:29 garbled 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 <powerpc/oea/ofw_rasconsvar.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         uint32_t sc_fbsize;
  83
  84         struct vcons_data vd;
  85 };
  86
  87 static int      ofbmatch(struct device *, struct cfdata *, void *);
  88 static void     ofbattach(struct device *, struct device *, void *);
  89
  90 CFATTACH_DECL(ofb, sizeof(struct ofb_softc),
  91     ofbmatch, ofbattach, NULL, NULL);
  92
  93 const struct wsscreen_descr *_ofb_scrlist[] = {
  94         &rascons_stdscreen,
  95         /* XXX other formats, graphics screen? */
  96 };
  97
  98 struct wsscreen_list ofb_screenlist = {
  99         sizeof(_ofb_scrlist) / sizeof(struct wsscreen_descr *), _ofb_scrlist
 100 };
 101
 102 static int      ofb_ioctl(void *, void *, u_long, void *, int, struct lwp *);
 103 static paddr_t  ofb_mmap(void *, void *, off_t, int);
 104
 105 static void     ofb_init_screen(void *, struct vcons_screen *, int, long *);
 106
 107 struct wsdisplay_accessops ofb_accessops = {
 108         ofb_ioctl,
 109         ofb_mmap,
 110         NULL,           /* vcons_alloc_screen */
 111         NULL,           /* vcons_free_screen */
 112         NULL,           /* vcons_show_screen */
 113         NULL            /* load_font */
 114 };
 115
 116 static void     ofb_putpalreg(struct ofb_softc *, int, uint8_t, uint8_t,
 117     uint8_t);
 118
 119 static int      ofb_getcmap(struct ofb_softc *, struct wsdisplay_cmap *);
 120 static int      ofb_putcmap(struct ofb_softc *, struct wsdisplay_cmap *);
 121 static void     ofb_init_cmap(struct ofb_softc *);
 122 static int      ofb_drm_print(void *, const char *);
 123
 124 extern const u_char rasops_cmap[768];
 125
 126 extern int console_node;
 127 extern int console_instance;
 128
 129 static int
 130 ofbmatch(struct device *parent, struct cfdata *match, void *aux)
 131 {
 132         struct pci_attach_args *pa = aux;
 133
 134         if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_APPLE &&
 135             PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_APPLE_CONTROL)
 136                 return 1;
 137
 138         if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY)
 139                 return 1;
 140
 141         return 0;
 142 }
 143
 144 static void
 145 ofbattach(struct device *parent, struct device *self, void *aux)
 146 {
 147         struct ofb_softc *sc = (struct ofb_softc *)self;
 148         struct pci_attach_args *pa = aux;
 149         struct wsemuldisplaydev_attach_args a;
 150         struct rasops_info *ri = &rascons_console_screen.scr_ri;
 151         long defattr;
 152         int console, node, sub;
 153         char devinfo[256];
 154
 155         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
 156         printf(": %s\n", devinfo);
 157
 158         if (console_node == 0)
 159                 return;
 160
 161         node = pcidev_to_ofdev(pa->pa_pc, pa->pa_tag);
 162         console = (node == console_node);
 163         if (!console) {
 164                 /* check if any of the childs matches */
 165                 sub = OF_child(node);
 166                 while ((sub != 0) && (sub != console_node)) {
 167                         sub = OF_peer(sub);
 168                 }
 169                 if (sub == console_node) {
 170                         console = true;
 171                 }
 172         }
 173
 174         sc->sc_memt = pa->pa_memt;
 175         sc->sc_iot = pa->pa_iot;
 176         sc->sc_pc = pa->pa_pc;
 177         sc->sc_pcitag = pa->pa_tag;
 178         sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
 179
 180         if (!console)
 181                 return;
 182
 183         vcons_init(&sc->vd, sc, &rascons_stdscreen, &ofb_accessops);
 184         sc->vd.init_screen = ofb_init_screen;
 185
 186         sc->sc_node = console_node;
 187
 188         sc->sc_ih = console_instance;
 189         vcons_init_screen(&sc->vd, &rascons_console_screen, 1, &defattr);
 190         rascons_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
 191
 192         printf("%s: %d x %d, %dbpp\n", self->dv_xname,
 193                ri->ri_width, ri->ri_height, ri->ri_depth);
 194
 195         sc->sc_fbaddr = 0;
 196         if (OF_getprop(sc->sc_node, "address", &sc->sc_fbaddr, 4) != 4)
 197                 OF_interpret("frame-buffer-adr", 0, 1, &sc->sc_fbaddr);
 198         if (sc->sc_fbaddr == 0) {
 199                 printf("%s: Unable to find the framebuffer address.\n",
 200                     sc->sc_dev.dv_xname);
 201                 return;
 202         }
 203         sc->sc_fbsize = round_page(ri->ri_stride * ri->ri_height);
 204
 205         /* XXX */
 206         if (OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs,
 207             sizeof(sc->sc_addrs)) == -1) {
 208                 sc->sc_node = OF_parent(sc->sc_node);
 209                 OF_getprop(sc->sc_node, "assigned-addresses", sc->sc_addrs,
 210                     sizeof(sc->sc_addrs));
 211         }
 212
 213         ofb_init_cmap(sc);
 214
 215         a.console = console;
 216         a.scrdata = &ofb_screenlist;
 217         a.accessops = &ofb_accessops;
 218         a.accesscookie = &sc->vd;
 219
 220         config_found(self, &a, wsemuldisplaydevprint);
 221
 222         config_found_ia(self, "drm", aux, ofb_drm_print);
 223 }
 224
 225 static int
 226 ofb_drm_print(void *aux, const char *pnp)
 227 {
 228         if (pnp)
 229                 aprint_normal("direct rendering for %s", pnp);
 230         return (UNSUPP);
 231 }
 232
 233 static void
 234 ofb_init_screen(void *cookie, struct vcons_screen *scr,
 235     int existing, long *defattr)
 236 {
 237         struct ofb_softc *sc = cookie;
 238         struct rasops_info *ri = &scr->scr_ri;
 239
 240         if (scr != &rascons_console_screen) {
 241                 rascons_init_rasops(sc->sc_node, ri);
 242         }
 243 }
 244
 245 static int
 246 ofb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l)
 247 {
 248         struct vcons_data *vd = v;
 249         struct ofb_softc *sc = vd->cookie;
 250         struct wsdisplay_fbinfo *wdf;
 251         struct vcons_screen *ms = vd->active;
 252         struct grfinfo *gm;
 253
 254         switch (cmd) {
 255         case WSDISPLAYIO_GTYPE:
 256                 *(u_int *)data = WSDISPLAY_TYPE_PCIMISC;        /* XXX ? */
 257                 return 0;
 258
 259         case WSDISPLAYIO_GINFO:
 260                 /* we won't get here without any screen anyway */
 261                 if (ms != NULL) {
 262                         wdf = (void *)data;
 263                         wdf->height = ms->scr_ri.ri_height;
 264                         wdf->width = ms->scr_ri.ri_width;
 265                         wdf->depth = ms->scr_ri.ri_depth;
 266                         wdf->cmsize = 256;
 267                         return 0;
 268                 } else
 269                         return ENODEV;
 270
 271         case WSDISPLAYIO_GETCMAP:
 272                 return ofb_getcmap(sc, (struct wsdisplay_cmap *)data);
 273
 274         case WSDISPLAYIO_PUTCMAP:
 275                 return ofb_putcmap(sc, (struct wsdisplay_cmap *)data);
 276
 277         /* XXX There are no way to know framebuffer pa from a user program. */
 278         case GRFIOCGINFO:
 279                 if (ms != NULL) {
 280                         gm = (void *)data;
 281                         memset(gm, 0, sizeof(struct grfinfo));
 282                         gm->gd_fbaddr = (void *)sc->sc_fbaddr;
 283                         gm->gd_fbrowbytes = ms->scr_ri.ri_stride;
 284                         return 0;
 285                 } else
 286                         return ENODEV;
 287         case WSDISPLAYIO_LINEBYTES:
 288                 {
 289                         *(int *)data = ms->scr_ri.ri_stride;
 290                         return 0;
 291                 }
 292         case WSDISPLAYIO_SMODE:
 293                 {
 294                         int new_mode = *(int*)data;
 295                         if (new_mode != sc->sc_mode)
 296                         {
 297                                 sc->sc_mode = new_mode;
 298                                 if (new_mode == WSDISPLAYIO_MODE_EMUL)
 299                                 {
 300                                         ofb_init_cmap(sc);
 301                                         vcons_redraw_screen(ms);
 302                                 }
 303                         }
 304                 }
 305                 return 0;
 306         /* PCI config read/write passthrough. */
 307         case PCI_IOC_CFGREAD:
 308         case PCI_IOC_CFGWRITE:
 309                 return (pci_devioctl(sc->sc_pc, sc->sc_pcitag,
 310                     cmd, data, flag, l));
 311         }
 312         return EPASSTHROUGH;
 313 }
 314
 315 static paddr_t
 316 ofb_mmap(void *v, void *vs, off_t offset, int prot)
 317 {
 318         struct vcons_data *vd = v;
 319         struct ofb_softc *sc = vd->cookie;
 320         struct rasops_info *ri;
 321         u_int32_t *ap = sc->sc_addrs;
 322         int i;
 323
 324         if (vd->active == NULL) {
 325                 printf("%s: no active screen.\n", sc->sc_dev.dv_xname);
 326                 return -1;
 327         }
 328
 329         ri = &vd->active->scr_ri;
 330
 331         /* framebuffer at offset 0 */
 332         if ((offset >= 0) && (offset < sc->sc_fbsize))
 333                 return bus_space_mmap(sc->sc_memt, sc->sc_fbaddr, offset, prot,
 334                     BUS_SPACE_MAP_LINEAR);
 335
 336         /*
 337          * restrict all other mappings to processes with superuser privileges
 338          * or the kernel itself
 339          */
 340         if (kauth_authorize_generic(kauth_cred_get(), KAUTH_GENERIC_ISSUSER,
 341             NULL) != 0) {
 342                 printf("%s: mmap() rejected.\n", sc->sc_dev.dv_xname);
 343                 return -1;
 344         }
 345
 346         /* let them mmap() 0xa0000 - 0xbffff if it's not covered above */
 347 #ifdef OFB_FAKE_VGA_FB
 348         if (offset >=0xa0000 && offset < 0xbffff)
 349                 return sc->sc_fbaddr + offset - 0xa0000;
 350 #endif
 351
 352         /* allow to map our IO space */
 353         if ((offset >= 0xf2000000) && (offset < 0xf2800000)) {
 354                 return bus_space_mmap(sc->sc_iot, offset-0xf2000000, 0, prot,
 355                     BUS_SPACE_MAP_LINEAR);
 356         }
 357
 358         for (i = 0; i < 6; i++) {
 359                 switch (ap[0] & OFW_PCI_PHYS_HI_SPACEMASK) {
 360                 case OFW_PCI_PHYS_HI_SPACE_MEM32:
 361                         if (offset >= ap[2] && offset < ap[2] + ap[4])
 362                                 return bus_space_mmap(sc->sc_memt, offset, 0,
 363                                     prot, BUS_SPACE_MAP_LINEAR);
 364                 }
 365                 ap += 5;
 366         }
 367         return -1;
 368 }
 369
 370 static int
 371 ofb_getcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm)
 372 {
 373         u_int index = cm->index;
 374         u_int count = cm->count;
 375         int error;
 376
 377         if (index >= 256 || count > 256 || index + count > 256)
 378                 return EINVAL;
 379
 380         error = copyout(&sc->sc_cmap_red[index],   cm->red,   count);
 381         if (error)
 382                 return error;
 383         error = copyout(&sc->sc_cmap_green[index], cm->green, count);
 384         if (error)
 385                 return error;
 386         error = copyout(&sc->sc_cmap_blue[index],  cm->blue,  count);
 387         if (error)
 388                 return error;
 389
 390         return 0;
 391 }
 392
 393 int
 394 ofb_putcmap(struct ofb_softc *sc, struct wsdisplay_cmap *cm)
 395 {
 396         u_int index = cm->index;
 397         u_int count = cm->count;
 398         int i, error;
 399         u_char rbuf[256], gbuf[256], bbuf[256];
 400         u_char *r, *g, *b;
 401
 402         if (cm->index >= 256 || cm->count > 256 ||
 403             (cm->index + cm->count) > 256)
 404                 return EINVAL;
 405         error = copyin(cm->red, &rbuf[index], count);
 406         if (error)
 407                 return error;
 408         error = copyin(cm->green, &gbuf[index], count);
 409         if (error)
 410                 return error;
 411         error = copyin(cm->blue, &bbuf[index], count);
 412         if (error)
 413                 return error;
 414
 415         memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
 416         memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
 417         memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
 418
 419         r = &sc->sc_cmap_red[index];
 420         g = &sc->sc_cmap_green[index];
 421         b = &sc->sc_cmap_blue[index];
 422         for (i = 0; i < count; i++) {
 423                 OF_call_method_1("color!", sc->sc_ih, 4, *r, *g, *b, index);
 424                 r++, g++, b++, index++;
 425         }
 426         return 0;
 427 }
 428
 429 static void
 430 ofb_putpalreg(struct ofb_softc *sc, int idx, uint8_t r, uint8_t g, uint8_t b)
 431 {
 432         if ((idx<0) || (idx > 255))
 433                 return;
 434         if (sc != NULL) {
 435                 OF_call_method_1("color!", sc->sc_ih, 4, r, g, b, idx);
 436                 sc->sc_cmap_red[idx] = r;
 437                 sc->sc_cmap_green[idx] = g;
 438                 sc->sc_cmap_blue[idx] = b;
 439         } else {
 440                 OF_call_method_1("color!", console_instance, 4, r, g, b, idx);
 441         }
 442 }
 443
 444 static void
 445 ofb_init_cmap(struct ofb_softc *sc)
 446 {
 447         int idx, i;
 448         /* mess with the palette only when we're running in 8 bit */
 449         if (rascons_console_screen.scr_ri.ri_depth == 8) {
 450                 idx = 0;
 451                 for (i = 0; i < 256; i++) {
 452                         ofb_putpalreg(sc, i, rasops_cmap[(i * 3) + 0],
 453                              rasops_cmap[(i * 3) + 1],
 454                              rasops_cmap[(i * 3) + 2]);
 455                 }
 456         }
 457 }