drivers/video/console/newport_con.c

   1 /*
   2  * newport_con.c: Abscon for newport hardware
   3  *
   4  * (C) 1998 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
   5  * (C) 1999 Ulf Carlsson (ulfc@thepuffingruop.com)
   6  *
   7  * This driver is based on sgicons.c and cons_newport.
   8  *
   9  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
  10  * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
  11  */
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/errno.h>
  15 #include <linux/tty.h>
  16 #include <linux/kd.h>
  17 #include <linux/selection.h>
  18 #include <linux/console.h>
  19 #include <linux/vt_kern.h>
  20 #include <linux/mm.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23
  24 #include <asm/io.h>
  25 #include <asm/uaccess.h>
  26 #include <asm/system.h>
  27 #include <asm/page.h>
  28 #include <asm/pgtable.h>
  29 #include <video/newport.h>
  30
  31 #include <linux/linux_logo.h>
  32 #include <linux/font.h>
  33
  34
  35 extern unsigned long sgi_gfxaddr;
  36
  37 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
  38
  39 /* borrowed from fbcon.c */
  40 #define REFCOUNT(fd)    (((int *)(fd))[-1])
  41 #define FNTSIZE(fd)     (((int *)(fd))[-2])
  42 #define FNTCHARCNT(fd)  (((int *)(fd))[-3])
  43 #define FONT_EXTRA_WORDS 3
  44
  45 static unsigned char *font_data[MAX_NR_CONSOLES];
  46
  47 static struct newport_regs *npregs;
  48
  49 static int logo_active;
  50 static int topscan;
  51 static int xcurs_correction = 29;
  52 static int newport_xsize;
  53 static int newport_ysize;
  54 static int newport_has_init;
  55
  56 static int newport_set_def_font(int unit, struct console_font *op);
  57
  58 #define BMASK(c) (c << 24)
  59
  60 #define RENDER(regs, cp) do { \
  61 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
  62 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
  63 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
  64 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
  65 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
  66 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
  67 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
  68 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
  69 } while(0)
  70
  71 #define TESTVAL 0xdeadbeef
  72 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
  73
  74 static inline void newport_render_background(int xstart, int ystart,
  75                                              int xend, int yend, int ci)
  76 {
  77         newport_wait(npregs);
  78         npregs->set.wrmask = 0xffffffff;
  79         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
  80                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
  81                                  | NPORT_DMODE0_STOPY);
  82         npregs->set.colori = ci;
  83         npregs->set.xystarti =
  84             (xstart << 16) | ((ystart + topscan) & 0x3ff);
  85         npregs->go.xyendi =
  86             ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
  87 }
  88
  89 static inline void newport_init_cmap(void)
  90 {
  91         unsigned short i;
  92
  93         for (i = 0; i < 16; i++) {
  94                 newport_bfwait(npregs);
  95                 newport_cmap_setaddr(npregs, color_table[i]);
  96                 newport_cmap_setrgb(npregs,
  97                                     default_red[i],
  98                                     default_grn[i], default_blu[i]);
  99         }
 100 }
 101
 102 static void newport_show_logo(void)
 103 {
 104 #ifdef CONFIG_LOGO_SGI_CLUT224
 105         const struct linux_logo *logo = fb_find_logo(8);
 106         const unsigned char *clut = logo->clut;
 107         const unsigned char *data = logo->data;
 108         unsigned long i;
 109
 110         for (i = 0; i < logo->clutsize; i++) {
 111                 newport_bfwait(npregs);
 112                 newport_cmap_setaddr(npregs, i + 0x20);
 113                 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
 114                 clut += 3;
 115         }
 116
 117         newport_wait(npregs);
 118         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 119                                  NPORT_DMODE0_CHOST);
 120
 121         npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
 122         npregs->set.xyendi = ((newport_xsize - 1) << 16);
 123         newport_wait(npregs);
 124
 125         for (i = 0; i < logo->width*logo->height; i++)
 126                 npregs->go.hostrw0 = *data++ << 24;
 127 #endif /* CONFIG_LOGO_SGI_CLUT224 */
 128 }
 129
 130 static inline void newport_clear_screen(int xstart, int ystart, int xend,
 131                                         int yend, int ci)
 132 {
 133         if (logo_active)
 134                 return;
 135
 136         newport_wait(npregs);
 137         npregs->set.wrmask = 0xffffffff;
 138         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 139                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 140                                  | NPORT_DMODE0_STOPY);
 141         npregs->set.colori = ci;
 142         npregs->set.xystarti = (xstart << 16) | ystart;
 143         npregs->go.xyendi = (xend << 16) | yend;
 144 }
 145
 146 static inline void newport_clear_lines(int ystart, int yend, int ci)
 147 {
 148         ystart = ((ystart << 4) + topscan) & 0x3ff;
 149         yend = ((yend << 4) + topscan + 15) & 0x3ff;
 150         newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
 151 }
 152
 153 static void newport_reset(void)
 154 {
 155         unsigned short treg;
 156         int i;
 157
 158         newport_wait(npregs);
 159         treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 160         newport_vc2_set(npregs, VC2_IREG_CONTROL,
 161                         (treg | VC2_CTRL_EVIDEO));
 162
 163         treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
 164         newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
 165         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 166                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 167         for (i = 0; i < 128; i++) {
 168                 newport_bfwait(npregs);
 169                 if (i == 92 || i == 94)
 170                         npregs->set.dcbdata0.byshort.s1 = 0xff00;
 171                 else
 172                         npregs->set.dcbdata0.byshort.s1 = 0x0000;
 173         }
 174
 175         newport_init_cmap();
 176
 177         /* turn off popup plane */
 178         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 179                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 180         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 181         npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
 182                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 183         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 184
 185         topscan = 0;
 186         npregs->cset.topscan = 0x3ff;
 187         npregs->cset.xywin = (4096 << 16) | 4096;
 188
 189         /* Clear the screen. */
 190         newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
 191 }
 192
 193 /*
 194  * calculate the actual screen size by reading
 195  * the video timing out of the VC2
 196  */
 197 static void newport_get_screensize(void)
 198 {
 199         int i, cols;
 200         unsigned short ventry, treg;
 201         unsigned short linetable[128];  /* should be enough */
 202
 203         ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
 204         newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
 205         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 206                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 207         for (i = 0; i < 128; i++) {
 208                 newport_bfwait(npregs);
 209                 linetable[i] = npregs->set.dcbdata0.byshort.s1;
 210         }
 211
 212         newport_xsize = newport_ysize = 0;
 213         for (i = 0; linetable[i + 1] && (i < sizeof(linetable)); i += 2) {
 214                 cols = 0;
 215                 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 216                 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 217                                        NPORT_DMODE_W2 | VC2_PROTOCOL);
 218                 do {
 219                         newport_bfwait(npregs);
 220                         treg = npregs->set.dcbdata0.byshort.s1;
 221                         if ((treg & 1) == 0)
 222                                 cols += (treg >> 7) & 0xfe;
 223                         if ((treg & 0x80) == 0) {
 224                                 newport_bfwait(npregs);
 225                                 treg = npregs->set.dcbdata0.byshort.s1;
 226                         }
 227                 } while ((treg & 0x8000) == 0);
 228                 if (cols) {
 229                         if (cols > newport_xsize)
 230                                 newport_xsize = cols;
 231                         newport_ysize += linetable[i + 1];
 232                 }
 233         }
 234         printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
 235 }
 236
 237 static void newport_get_revisions(void)
 238 {
 239         unsigned int tmp;
 240         unsigned int board_rev;
 241         unsigned int rex3_rev;
 242         unsigned int vc2_rev;
 243         unsigned int cmap_rev;
 244         unsigned int xmap9_rev;
 245         unsigned int bt445_rev;
 246         unsigned int bitplanes;
 247
 248         rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
 249
 250         npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
 251                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 252         tmp = npregs->set.dcbdata0.bybytes.b3;
 253         cmap_rev = tmp & 7;
 254         board_rev = (tmp >> 4) & 7;
 255         bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
 256
 257         npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
 258                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 259         tmp = npregs->set.dcbdata0.bybytes.b3;
 260         if ((tmp & 7) < cmap_rev)
 261                 cmap_rev = (tmp & 7);
 262
 263         vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
 264
 265         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 266                                XM9_CRS_REVISION | NPORT_DMODE_W1);
 267         xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
 268
 269         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 270                                BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
 271         npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
 272         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 273                                BT445_CSR_REVISION | NPORT_DMODE_W1);
 274         bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
 275
 276 #define L(a)     (char)('A'+(a))
 277         printk
 278             ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
 279              board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
 280              L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
 281 #undef L
 282
 283         if (board_rev == 3)     /* I don't know all affected revisions */
 284                 xcurs_correction = 21;
 285 }
 286
 287 static void newport_exit(void)
 288 {
 289         int i;
 290
 291         /* free memory used by user font */
 292         for (i = 0; i < MAX_NR_CONSOLES; i++)
 293                 newport_set_def_font(i, NULL);
 294 }
 295
 296 /* Can't be __init, take_over_console may call it later */
 297 static const char *newport_startup(void)
 298 {
 299         int i;
 300
 301         if (!sgi_gfxaddr)
 302                 return NULL;
 303
 304         if (!npregs)
 305                 npregs = (struct newport_regs *)/* ioremap cannot fail */
 306                         ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
 307         npregs->cset.config = NPORT_CFG_GD0;
 308
 309         if (newport_wait(npregs))
 310                 goto out_unmap;
 311
 312         npregs->set.xstarti = TESTVAL;
 313         if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
 314                 goto out_unmap;
 315
 316         for (i = 0; i < MAX_NR_CONSOLES; i++)
 317                 font_data[i] = FONT_DATA;
 318
 319         newport_reset();
 320         newport_get_revisions();
 321         newport_get_screensize();
 322         newport_has_init = 1;
 323
 324         return "SGI Newport";
 325
 326 out_unmap:
 327         return NULL;
 328 }
 329
 330 static void newport_init(struct vc_data *vc, int init)
 331 {
 332         vc->vc_cols = newport_xsize / 8;
 333         vc->vc_rows = newport_ysize / 16;
 334         vc->vc_can_do_color = 1;
 335 }
 336
 337 static void newport_deinit(struct vc_data *c)
 338 {
 339         if (!con_is_bound(&newport_con) && newport_has_init) {
 340                 newport_exit();
 341                 newport_has_init = 0;
 342         }
 343 }
 344
 345 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
 346                           int width)
 347 {
 348         int xend = ((sx + width) << 3) - 1;
 349         int ystart = ((sy << 4) + topscan) & 0x3ff;
 350         int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
 351
 352         if (logo_active)
 353                 return;
 354
 355         if (ystart < yend) {
 356                 newport_clear_screen(sx << 3, ystart, xend, yend,
 357                                      (vc->vc_color & 0xf0) >> 4);
 358         } else {
 359                 newport_clear_screen(sx << 3, ystart, xend, 1023,
 360                                      (vc->vc_color & 0xf0) >> 4);
 361                 newport_clear_screen(sx << 3, 0, xend, yend,
 362                                      (vc->vc_color & 0xf0) >> 4);
 363         }
 364 }
 365
 366 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
 367                          int xpos)
 368 {
 369         unsigned char *p;
 370
 371         p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
 372         charattr = (charattr >> 8) & 0xff;
 373         xpos <<= 3;
 374         ypos <<= 4;
 375
 376         newport_render_background(xpos, ypos, xpos, ypos,
 377                                   (charattr & 0xf0) >> 4);
 378
 379         /* Set the color and drawing mode. */
 380         newport_wait(npregs);
 381         npregs->set.colori = charattr & 0xf;
 382         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 383                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 384                                  NPORT_DMODE0_L32);
 385
 386         /* Set coordinates for bitmap operation. */
 387         npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
 388         npregs->set.xyendi = ((xpos + 7) << 16);
 389         newport_wait(npregs);
 390
 391         /* Go, baby, go... */
 392         RENDER(npregs, p);
 393 }
 394
 395 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
 396                           int count, int ypos, int xpos)
 397 {
 398         int i;
 399         int charattr;
 400         unsigned char *p;
 401
 402         charattr = (scr_readw(s) >> 8) & 0xff;
 403
 404         xpos <<= 3;
 405         ypos <<= 4;
 406
 407         if (!logo_active)
 408                 /* Clear the area behing the string */
 409                 newport_render_background(xpos, ypos,
 410                                           xpos + ((count - 1) << 3), ypos,
 411                                           (charattr & 0xf0) >> 4);
 412
 413         newport_wait(npregs);
 414
 415         /* Set the color and drawing mode. */
 416         npregs->set.colori = charattr & 0xf;
 417         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 418                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 419                                  NPORT_DMODE0_L32);
 420
 421         for (i = 0; i < count; i++, xpos += 8) {
 422                 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
 423
 424                 newport_wait(npregs);
 425
 426                 /* Set coordinates for bitmap operation. */
 427                 npregs->set.xystarti =
 428                     (xpos << 16) | ((ypos + topscan) & 0x3ff);
 429                 npregs->set.xyendi = ((xpos + 7) << 16);
 430
 431                 /* Go, baby, go... */
 432                 RENDER(npregs, p);
 433         }
 434 }
 435
 436 static void newport_cursor(struct vc_data *vc, int mode)
 437 {
 438         unsigned short treg;
 439         int xcurs, ycurs;
 440
 441         switch (mode) {
 442         case CM_ERASE:
 443                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 444                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 445                                 (treg & ~(VC2_CTRL_ECDISP)));
 446                 break;
 447
 448         case CM_MOVE:
 449         case CM_DRAW:
 450                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 451                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 452                                 (treg | VC2_CTRL_ECDISP));
 453                 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
 454                 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
 455                 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
 456                 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
 457                 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
 458         }
 459 }
 460
 461 static int newport_switch(struct vc_data *vc)
 462 {
 463         static int logo_drawn = 0;
 464
 465         topscan = 0;
 466         npregs->cset.topscan = 0x3ff;
 467
 468         if (!logo_drawn) {
 469                 newport_show_logo();
 470                 logo_drawn = 1;
 471                 logo_active = 1;
 472         }
 473
 474         return 1;
 475 }
 476
 477 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
 478 {
 479         unsigned short treg;
 480
 481         if (blank == 0) {
 482                 /* unblank console */
 483                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 484                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 485                                 (treg | VC2_CTRL_EDISP));
 486         } else {
 487                 /* blank console */
 488                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 489                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 490                                 (treg & ~(VC2_CTRL_EDISP)));
 491         }
 492         return 1;
 493 }
 494
 495 static int newport_set_font(int unit, struct console_font *op)
 496 {
 497         int w = op->width;
 498         int h = op->height;
 499         int size = h * op->charcount;
 500         int i;
 501         unsigned char *new_data, *data = op->data, *p;
 502
 503         /* ladis: when I grow up, there will be a day... and more sizes will
 504          * be supported ;-) */
 505         if ((w != 8) || (h != 16)
 506             || (op->charcount != 256 && op->charcount != 512))
 507                 return -EINVAL;
 508
 509         if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
 510              GFP_USER))) return -ENOMEM;
 511
 512         new_data += FONT_EXTRA_WORDS * sizeof(int);
 513         FNTSIZE(new_data) = size;
 514         FNTCHARCNT(new_data) = op->charcount;
 515         REFCOUNT(new_data) = 0; /* usage counter */
 516
 517         p = new_data;
 518         for (i = 0; i < op->charcount; i++) {
 519                 memcpy(p, data, h);
 520                 data += 32;
 521                 p += h;
 522         }
 523
 524         /* check if font is already used by other console */
 525         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 526                 if (font_data[i] != FONT_DATA
 527                     && FNTSIZE(font_data[i]) == size
 528                     && !memcmp(font_data[i], new_data, size)) {
 529                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
 530                         /* current font is the same as the new one */
 531                         if (i == unit)
 532                                 return 0;
 533                         new_data = font_data[i];
 534                         break;
 535                 }
 536         }
 537         /* old font is user font */
 538         if (font_data[unit] != FONT_DATA) {
 539                 if (--REFCOUNT(font_data[unit]) == 0)
 540                         kfree(font_data[unit] -
 541                               FONT_EXTRA_WORDS * sizeof(int));
 542         }
 543         REFCOUNT(new_data)++;
 544         font_data[unit] = new_data;
 545
 546         return 0;
 547 }
 548
 549 static int newport_set_def_font(int unit, struct console_font *op)
 550 {
 551         if (font_data[unit] != FONT_DATA) {
 552                 if (--REFCOUNT(font_data[unit]) == 0)
 553                         kfree(font_data[unit] -
 554                               FONT_EXTRA_WORDS * sizeof(int));
 555                 font_data[unit] = FONT_DATA;
 556         }
 557
 558         return 0;
 559 }
 560
 561 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
 562 {
 563         return newport_set_def_font(vc->vc_num, op);
 564 }
 565
 566 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
 567 {
 568         return newport_set_font(vc->vc_num, font);
 569 }
 570
 571 static int newport_set_palette(struct vc_data *vc, unsigned char *table)
 572 {
 573         return -EINVAL;
 574 }
 575
 576 static int newport_scrolldelta(struct vc_data *vc, int lines)
 577 {
 578         /* there is (nearly) no off-screen memory, so we can't scroll back */
 579         return 0;
 580 }
 581
 582 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
 583                           int lines)
 584 {
 585         int count, x, y;
 586         unsigned short *s, *d;
 587         unsigned short chattr;
 588
 589         logo_active = 0;        /* it's time to disable the logo now.. */
 590
 591         if (t == 0 && b == vc->vc_rows) {
 592                 if (dir == SM_UP) {
 593                         topscan = (topscan + (lines << 4)) & 0x3ff;
 594                         newport_clear_lines(vc->vc_rows - lines,
 595                                             vc->vc_rows - 1,
 596                                             (vc->vc_color & 0xf0) >> 4);
 597                 } else {
 598                         topscan = (topscan + (-lines << 4)) & 0x3ff;
 599                         newport_clear_lines(0, lines - 1,
 600                                             (vc->vc_color & 0xf0) >> 4);
 601                 }
 602                 npregs->cset.topscan = (topscan - 1) & 0x3ff;
 603                 return 0;
 604         }
 605
 606         count = (b - t - lines) * vc->vc_cols;
 607         if (dir == SM_UP) {
 608                 x = 0;
 609                 y = t;
 610                 s = (unsigned short *) (vc->vc_origin +
 611                                         vc->vc_size_row * (t + lines));
 612                 d = (unsigned short *) (vc->vc_origin +
 613                                         vc->vc_size_row * t);
 614                 while (count--) {
 615                         chattr = scr_readw(s++);
 616                         if (chattr != scr_readw(d)) {
 617                                 newport_putc(vc, chattr, y, x);
 618                                 scr_writew(chattr, d);
 619                         }
 620                         d++;
 621                         if (++x == vc->vc_cols) {
 622                                 x = 0;
 623                                 y++;
 624                         }
 625                 }
 626                 d = (unsigned short *) (vc->vc_origin +
 627                                         vc->vc_size_row * (b - lines));
 628                 x = 0;
 629                 y = b - lines;
 630                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 631                         if (scr_readw(d) != vc->vc_video_erase_char) {
 632                                 newport_putc(vc, vc->vc_video_erase_char,
 633                                              y, x);
 634                                 scr_writew(vc->vc_video_erase_char, d);
 635                         }
 636                         d++;
 637                         if (++x == vc->vc_cols) {
 638                                 x = 0;
 639                                 y++;
 640                         }
 641                 }
 642         } else {
 643                 x = vc->vc_cols - 1;
 644                 y = b - 1;
 645                 s = (unsigned short *) (vc->vc_origin +
 646                                         vc->vc_size_row * (b - lines) - 2);
 647                 d = (unsigned short *) (vc->vc_origin +
 648                                         vc->vc_size_row * b - 2);
 649                 while (count--) {
 650                         chattr = scr_readw(s--);
 651                         if (chattr != scr_readw(d)) {
 652                                 newport_putc(vc, chattr, y, x);
 653                                 scr_writew(chattr, d);
 654                         }
 655                         d--;
 656                         if (x-- == 0) {
 657                                 x = vc->vc_cols - 1;
 658                                 y--;
 659                         }
 660                 }
 661                 d = (unsigned short *) (vc->vc_origin +
 662                                         vc->vc_size_row * t);
 663                 x = 0;
 664                 y = t;
 665                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 666                         if (scr_readw(d) != vc->vc_video_erase_char) {
 667                                 newport_putc(vc, vc->vc_video_erase_char,
 668                                              y, x);
 669                                 scr_writew(vc->vc_video_erase_char, d);
 670                         }
 671                         d++;
 672                         if (++x == vc->vc_cols) {
 673                                 x = 0;
 674                                 y++;
 675                         }
 676                 }
 677         }
 678         return 1;
 679 }
 680
 681 static void newport_bmove(struct vc_data *vc, int sy, int sx, int dy,
 682                           int dx, int h, int w)
 683 {
 684         short xs, ys, xe, ye, xoffs, yoffs, tmp;
 685
 686         xs = sx << 3;
 687         xe = ((sx + w) << 3) - 1;
 688         /*
 689          * as bmove is only used to move stuff around in the same line
 690          * (h == 1), we don't care about wrap arounds caused by topscan != 0
 691          */
 692         ys = ((sy << 4) + topscan) & 0x3ff;
 693         ye = (((sy + h) << 4) - 1 + topscan) & 0x3ff;
 694         xoffs = (dx - sx) << 3;
 695         yoffs = (dy - sy) << 4;
 696         if (xoffs > 0) {
 697                 /* move to the right, exchange starting points */
 698                 tmp = xe;
 699                 xe = xs;
 700                 xs = tmp;
 701         }
 702         newport_wait(npregs);
 703         npregs->set.drawmode0 = (NPORT_DMODE0_S2S | NPORT_DMODE0_BLOCK |
 704                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 705                                  | NPORT_DMODE0_STOPY);
 706         npregs->set.xystarti = (xs << 16) | ys;
 707         npregs->set.xyendi = (xe << 16) | ye;
 708         npregs->go.xymove = (xoffs << 16) | yoffs;
 709 }
 710
 711 static int newport_dummy(struct vc_data *c)
 712 {
 713         return 0;
 714 }
 715
 716 #define DUMMY (void *) newport_dummy
 717
 718 const struct consw newport_con = {
 719         .owner            = THIS_MODULE,
 720         .con_startup      = newport_startup,
 721         .con_init         = newport_init,
 722         .con_deinit       = newport_deinit,
 723         .con_clear        = newport_clear,
 724         .con_putc         = newport_putc,
 725         .con_putcs        = newport_putcs,
 726         .con_cursor       = newport_cursor,
 727         .con_scroll       = newport_scroll,
 728         .con_bmove        = newport_bmove,
 729         .con_switch       = newport_switch,
 730         .con_blank        = newport_blank,
 731         .con_font_set     = newport_font_set,
 732         .con_font_default = newport_font_default,
 733         .con_set_palette  = newport_set_palette,
 734         .con_scrolldelta  = newport_scrolldelta,
 735         .con_set_origin   = DUMMY,
 736         .con_save_screen  = DUMMY
 737 };
 738
 739 #ifdef MODULE
 740 static int __init newport_console_init(void)
 741 {
 742
 743         if (!sgi_gfxaddr)
 744                 return NULL;
 745
 746         if (!npregs)
 747                 npregs = (struct newport_regs *)/* ioremap cannot fail */
 748                         ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
 749
 750         return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 751 }
 752 module_init(newport_console_init);
 753
 754 static void __exit newport_console_exit(void)
 755 {
 756         give_up_console(&newport_con);
 757         iounmap((void *)npregs);
 758 }
 759 module_exit(newport_console_exit);
 760 #endif
 761
 762 MODULE_LICENSE("GPL");