sys/arch/sparc64/dev/gfb.c

   1 /*      $NetBSD: gfb.c,v 1.1 2009/12/29 06:55:55 macallan Exp $ */
   2
   3 /*
   4  * Copyright (c) 2009 Michael Lorenz
   5  * 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  * A console driver for Sun XVR-1000 graphics cards
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: gfb.c,v 1.1 2009/12/29 06:55:55 macallan Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/kernel.h>
  38 #include <sys/device.h>
  39 #include <sys/malloc.h>
  40 #include <sys/lwp.h>
  41 #include <sys/kauth.h>
  42 #include <sys/kmem.h>
  43
  44 #include <uvm/uvm_extern.h>
  45
  46 #include <dev/videomode/videomode.h>
  47
  48 #include <machine/bus.h>
  49 #include <machine/autoconf.h>
  50 #include <machine/openfirm.h>
  51
  52 #include <dev/wscons/wsdisplayvar.h>
  53 #include <dev/wscons/wsconsio.h>
  54 #include <dev/wsfont/wsfont.h>
  55 #include <dev/rasops/rasops.h>
  56 #include <dev/wscons/wsdisplay_vconsvar.h>
  57
  58
  59 struct gfb_softc {
  60         device_t sc_dev;
  61
  62         bus_space_tag_t sc_memt;
  63
  64         bus_space_handle_t sc_fbh;
  65         bus_addr_t sc_fb_paddr;
  66
  67         int sc_width, sc_height, sc_depth, sc_stride, sc_fblen;
  68         int sc_locked;
  69         void *sc_fbaddr, *sc_shadow;
  70         struct vcons_screen sc_console_screen;
  71         struct wsscreen_descr sc_defaultscreen_descr;
  72         const struct wsscreen_descr *sc_screens[1];
  73         struct wsscreen_list sc_screenlist;
  74         struct vcons_data vd;
  75         int sc_mode;
  76         int sc_node;
  77         u_char sc_cmap_red[256];
  78         u_char sc_cmap_green[256];
  79         u_char sc_cmap_blue[256];
  80 };
  81
  82 static int      gfb_match(device_t, cfdata_t, void *);
  83 static void     gfb_attach(device_t, device_t, void *);
  84
  85 CFATTACH_DECL_NEW(gfb, sizeof(struct gfb_softc),
  86     gfb_match, gfb_attach, NULL, NULL);
  87
  88 extern const u_char rasops_cmap[768];
  89
  90 static int      gfb_ioctl(void *, void *, u_long, void *, int,
  91                              struct lwp *);
  92 static paddr_t  gfb_mmap(void *, void *, off_t, int);
  93 static void     gfb_init_screen(void *, struct vcons_screen *, int, long *);
  94
  95 static int      gfb_putcmap(struct gfb_softc *, struct wsdisplay_cmap *);
  96 static int      gfb_getcmap(struct gfb_softc *, struct wsdisplay_cmap *);
  97 static void     gfb_restore_palette(struct gfb_softc *);
  98 static int      gfb_putpalreg(struct gfb_softc *, uint8_t, uint8_t,
  99                             uint8_t, uint8_t);
 100
 101 struct wsdisplay_accessops gfb_accessops = {
 102         gfb_ioctl,
 103         gfb_mmap,
 104         NULL,   /* alloc_screen */
 105         NULL,   /* free_screen */
 106         NULL,   /* show_screen */
 107         NULL,   /* load_font */
 108         NULL,   /* pollc */
 109         NULL    /* scroll */
 110 };
 111
 112 extern int prom_stdout_node;
 113
 114 static int
 115 gfb_match(device_t parent, cfdata_t match, void *aux)
 116 {
 117         struct mainbus_attach_args *ma = aux;
 118
 119         if (strcmp(ma->ma_name, "SUNW,gfb") == 0 )
 120                 return 100;
 121         return 0;
 122 }
 123
 124 static void
 125 gfb_attach(device_t parent, device_t self, void *aux)
 126 {
 127         struct gfb_softc        *sc = device_private(self);
 128         struct mainbus_attach_args      *ma = aux;
 129         struct rasops_info      *ri;
 130         struct wsemuldisplaydev_attach_args aa;
 131         unsigned long           defattr;
 132         bool                    is_console;
 133         int i, j;
 134
 135         sc->sc_memt = ma->ma_bustag;
 136         sc->sc_dev = self;
 137         sc->sc_node = ma->ma_node;
 138
 139         if (ma->ma_nreg < 7) {
 140                 aprint_error("%s: can't find the fb range\n",
 141                     device_xname(self));
 142                 return;
 143         }
 144
 145         is_console = (prom_stdout_node == ma->ma_node);
 146
 147         aprint_normal(": Sun XVR-1000%s\n", is_console ? " (console)" : "");
 148
 149         sc->sc_depth = 32;
 150         sc->sc_stride = 0x4000;
 151         sc->sc_height = prom_getpropint(sc->sc_node, "height", 0);
 152         sc->sc_width = prom_getpropint(sc->sc_node, "width", 0);
 153         sc->sc_fblen = sc->sc_stride * sc->sc_height;
 154
 155         if (sc->sc_fblen == 0) {
 156                 aprint_error("%s: not set up by firmware, can't continue.\n",
 157                     device_xname(self));
 158                 return;
 159         }
 160
 161         sc->sc_shadow = kmem_alloc(sc->sc_fblen, KM_SLEEP);
 162         sc->sc_locked = 0;
 163         sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
 164
 165         if (bus_space_map(sc->sc_memt, ma->ma_reg[6].ur_paddr,
 166             sc->sc_fblen, BUS_SPACE_MAP_LINEAR, &sc->sc_fbh)) {
 167                 printf(": failed to map the framebuffer\n");
 168                 return;
 169         }
 170         sc->sc_fbaddr = bus_space_vaddr(sc->sc_memt, sc->sc_fbh);
 171         sc->sc_fb_paddr = ma->ma_reg[6].ur_paddr;
 172
 173         sc->sc_defaultscreen_descr = (struct wsscreen_descr){
 174                 "default",
 175                 0, 0,
 176                 NULL,
 177                 8, 16,
 178                 WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
 179                 NULL
 180         };
 181         sc->sc_screens[0] = &sc->sc_defaultscreen_descr;
 182         sc->sc_screenlist = (struct wsscreen_list){1, sc->sc_screens};
 183         sc->sc_mode = WSDISPLAYIO_MODE_EMUL;
 184         sc->sc_locked = 0;
 185
 186         vcons_init(&sc->vd, sc, &sc->sc_defaultscreen_descr,
 187             &gfb_accessops);
 188         sc->vd.init_screen = gfb_init_screen;
 189
 190         ri = &sc->sc_console_screen.scr_ri;
 191
 192         j = 0;
 193         for (i = 0; i < (1 << sc->sc_depth); i++) {
 194
 195                 sc->sc_cmap_red[i] = rasops_cmap[j];
 196                 sc->sc_cmap_green[i] = rasops_cmap[j + 1];
 197                 sc->sc_cmap_blue[i] = rasops_cmap[j + 2];
 198                 gfb_putpalreg(sc, i, rasops_cmap[j], rasops_cmap[j + 1],
 199                     rasops_cmap[j + 2]);
 200                 j += 3;
 201         }
 202
 203         if (is_console) {
 204                 vcons_init_screen(&sc->vd, &sc->sc_console_screen, 1,
 205                     &defattr);
 206                 sc->sc_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
 207
 208 #if notyet
 209                 gfb_rectfill(sc, 0, 0, sc->sc_width, sc->sc_height,
 210                     ri->ri_devcmap[(defattr >> 16) & 0xff]);
 211 #endif
 212                 sc->sc_defaultscreen_descr.textops = &ri->ri_ops;
 213                 sc->sc_defaultscreen_descr.capabilities = ri->ri_caps;
 214                 sc->sc_defaultscreen_descr.nrows = ri->ri_rows;
 215                 sc->sc_defaultscreen_descr.ncols = ri->ri_cols;
 216                 wsdisplay_cnattach(&sc->sc_defaultscreen_descr, ri, 0, 0,
 217                     defattr);
 218                 vcons_replay_msgbuf(&sc->sc_console_screen);
 219         } else {
 220                 /*
 221                  * since we're not the console we can postpone the rest
 222                  * until someone actually allocates a screen for us
 223                  */
 224                 (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr);
 225         }
 226
 227         aa.console = is_console;
 228         aa.scrdata = &sc->sc_screenlist;
 229         aa.accessops = &gfb_accessops;
 230         aa.accesscookie = &sc->vd;
 231
 232         config_found(sc->sc_dev, &aa, wsemuldisplaydevprint);
 233 }
 234
 235 static int
 236 gfb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
 237         struct lwp *l)
 238 {
 239         struct vcons_data *vd = v;
 240         struct gfb_softc *sc = vd->cookie;
 241         struct wsdisplay_fbinfo *wdf;
 242         struct vcons_screen *ms = vd->active;
 243
 244         switch (cmd) {
 245
 246                 case WSDISPLAYIO_GTYPE:
 247                         *(u_int *)data = WSDISPLAY_TYPE_XVR1000;
 248                         return 0;
 249
 250                 case WSDISPLAYIO_GINFO:
 251                         if (ms == NULL)
 252                                 return ENODEV;
 253                         wdf = (void *)data;
 254                         wdf->height = ms->scr_ri.ri_height;
 255                         wdf->width = ms->scr_ri.ri_width;
 256                         wdf->depth = ms->scr_ri.ri_depth;
 257                         wdf->cmsize = 256;
 258                         return 0;
 259
 260                 case WSDISPLAYIO_GETCMAP:
 261                         return gfb_getcmap(sc,
 262                             (struct wsdisplay_cmap *)data);
 263
 264                 case WSDISPLAYIO_PUTCMAP:
 265                         return gfb_putcmap(sc,
 266                             (struct wsdisplay_cmap *)data);
 267
 268                 case WSDISPLAYIO_LINEBYTES:
 269                         *(u_int *)data = sc->sc_stride;
 270                         return 0;
 271
 272                 case WSDISPLAYIO_SMODE:
 273                         {
 274                                 int new_mode = *(int*)data;
 275
 276                                 /* notify the bus backend */
 277                                 if (new_mode != sc->sc_mode) {
 278                                         sc->sc_mode = new_mode;
 279                                         if(new_mode == WSDISPLAYIO_MODE_EMUL) {
 280                                                 gfb_restore_palette(sc);
 281                                                 vcons_redraw_screen(ms);
 282                                         }
 283                                 }
 284                         }
 285                         return 0;
 286         }
 287         return EPASSTHROUGH;
 288 }
 289
 290 static paddr_t
 291 gfb_mmap(void *v, void *vs, off_t offset, int prot)
 292 {
 293         struct vcons_data *vd = v;
 294         struct gfb_softc *sc = vd->cookie;
 295         paddr_t pa;
 296
 297         /* 'regular' framebuffer mmap()ing */
 298         if (offset < sc->sc_fblen) {
 299                 pa = bus_space_mmap(sc->sc_memt, sc->sc_fb_paddr + offset, 0,
 300                     prot, BUS_SPACE_MAP_LINEAR);
 301                 return pa;
 302         }
 303
 304         /*
 305          * restrict all other mappings to processes with superuser privileges
 306          * or the kernel itself
 307          */
 308         if (kauth_authorize_generic(kauth_cred_get(), KAUTH_GENERIC_ISSUSER,
 309             NULL) != 0) {
 310                 aprint_normal("%s: mmap() rejected.\n",
 311                     device_xname(sc->sc_dev));
 312                 return -1;
 313         }
 314
 315         /* let userland map other ranges */
 316
 317         return -1;
 318 }
 319
 320 static void
 321 gfb_init_screen(void *cookie, struct vcons_screen *scr,
 322     int existing, long *defattr)
 323 {
 324         struct gfb_softc *sc = cookie;
 325         struct rasops_info *ri = &scr->scr_ri;
 326
 327         ri->ri_depth = sc->sc_depth;
 328         ri->ri_width = sc->sc_width;
 329         ri->ri_height = sc->sc_height;
 330         ri->ri_stride = sc->sc_stride;
 331         ri->ri_flg = RI_CENTER | RI_FULLCLEAR;
 332
 333         ri->ri_bits = sc->sc_shadow;
 334         ri->ri_hwbits = (char *)sc->sc_fbaddr;
 335
 336         if (existing) {
 337                 ri->ri_flg |= RI_CLEAR;
 338         }
 339
 340         rasops_init(ri, sc->sc_height / 8, sc->sc_width / 8);
 341         ri->ri_caps = WSSCREEN_WSCOLORS;
 342
 343         rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
 344                     sc->sc_width / ri->ri_font->fontwidth);
 345
 346         ri->ri_hw = scr;
 347 #if 0
 348         ri->ri_ops.copyrows = gfb_copyrows;
 349         ri->ri_ops.copycols = gfb_copycols;
 350         ri->ri_ops.cursor = gfb_cursor;
 351         ri->ri_ops.eraserows = gfb_eraserows;
 352         ri->ri_ops.erasecols = gfb_erasecols;
 353         ri->ri_ops.putchar = gfb_putchar;
 354 #endif
 355 }
 356
 357 static int
 358 gfb_putcmap(struct gfb_softc *sc, struct wsdisplay_cmap *cm)
 359 {
 360         u_char *r, *g, *b;
 361         u_int index = cm->index;
 362         u_int count = cm->count;
 363         int i, error;
 364         u_char rbuf[256], gbuf[256], bbuf[256];
 365
 366 #ifdef GFB_DEBUG
 367         aprint_debug("putcmap: %d %d\n",index, count);
 368 #endif
 369         if (cm->index >= 256 || cm->count > 256 ||
 370             (cm->index + cm->count) > 256)
 371                 return EINVAL;
 372         error = copyin(cm->red, &rbuf[index], count);
 373         if (error)
 374                 return error;
 375         error = copyin(cm->green, &gbuf[index], count);
 376         if (error)
 377                 return error;
 378         error = copyin(cm->blue, &bbuf[index], count);
 379         if (error)
 380                 return error;
 381
 382         memcpy(&sc->sc_cmap_red[index], &rbuf[index], count);
 383         memcpy(&sc->sc_cmap_green[index], &gbuf[index], count);
 384         memcpy(&sc->sc_cmap_blue[index], &bbuf[index], count);
 385
 386         r = &sc->sc_cmap_red[index];
 387         g = &sc->sc_cmap_green[index];
 388         b = &sc->sc_cmap_blue[index];
 389
 390         for (i = 0; i < count; i++) {
 391                 gfb_putpalreg(sc, index, *r, *g, *b);
 392                 index++;
 393                 r++, g++, b++;
 394         }
 395         return 0;
 396 }
 397
 398 static int
 399 gfb_getcmap(struct gfb_softc *sc, struct wsdisplay_cmap *cm)
 400 {
 401         u_int index = cm->index;
 402         u_int count = cm->count;
 403         int error;
 404
 405         if (index >= 255 || count > 256 || index + count > 256)
 406                 return EINVAL;
 407
 408         error = copyout(&sc->sc_cmap_red[index],   cm->red,   count);
 409         if (error)
 410                 return error;
 411         error = copyout(&sc->sc_cmap_green[index], cm->green, count);
 412         if (error)
 413                 return error;
 414         error = copyout(&sc->sc_cmap_blue[index],  cm->blue,  count);
 415         if (error)
 416                 return error;
 417
 418         return 0;
 419 }
 420
 421 static void
 422 gfb_restore_palette(struct gfb_softc *sc)
 423 {
 424         int i;
 425
 426         for (i = 0; i < (1 << sc->sc_depth); i++) {
 427                 gfb_putpalreg(sc, i, sc->sc_cmap_red[i],
 428                     sc->sc_cmap_green[i], sc->sc_cmap_blue[i]);
 429         }
 430 }
 431
 432 static int
 433 gfb_putpalreg(struct gfb_softc *sc, uint8_t idx, uint8_t r, uint8_t g,
 434     uint8_t b)
 435 {
 436         return 0;
 437 }