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/uaccess.h>
  25 #include <asm/system.h>
  26 #include <asm/page.h>
  27 #include <asm/pgtable.h>
  28 #include <video/newport.h>
  29
  30 #include <linux/linux_logo.h>
  31 #include <linux/font.h>
  32
  33
  34 extern struct font_desc font_vga_8x16;
  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
  55 static int newport_set_def_font(int unit, struct console_font_op *op);
  56
  57 #define BMASK(c) (c << 24)
  58
  59 #define RENDER(regs, cp) do { \
  60 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
  61 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
  62 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
  63 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
  64 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
  65 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
  66 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
  67 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
  68 } while(0)
  69
  70 #define TESTVAL 0xdeadbeef
  71 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
  72
  73 static inline void newport_render_background(int xstart, int ystart,
  74                                              int xend, int yend, int ci)
  75 {
  76         newport_wait();
  77         npregs->set.wrmask = 0xffffffff;
  78         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
  79                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
  80                                  | NPORT_DMODE0_STOPY);
  81         npregs->set.colori = ci;
  82         npregs->set.xystarti =
  83             (xstart << 16) | ((ystart + topscan) & 0x3ff);
  84         npregs->go.xyendi =
  85             ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
  86 }
  87
  88 static inline void newport_init_cmap(void)
  89 {
  90         unsigned short i;
  91
  92         for (i = 0; i < 16; i++) {
  93                 newport_bfwait();
  94                 newport_cmap_setaddr(npregs, color_table[i]);
  95                 newport_cmap_setrgb(npregs,
  96                                     default_red[i],
  97                                     default_grn[i], default_blu[i]);
  98         }
  99 }
 100
 101 static void newport_show_logo(void)
 102 {
 103 #ifdef CONFIG_LOGO_SGI_CLUT224
 104         const struct linux_logo *logo = fb_find_logo(8);
 105         const unsigned char *clut = logo->clut;
 106         const unsigned char *data = logo->data;
 107         unsigned long i;
 108
 109         for (i = 0; i < logo->clutsize; i++) {
 110                 newport_bfwait();
 111                 newport_cmap_setaddr(npregs, i + 0x20);
 112                 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
 113                 clut += 3;
 114         }
 115
 116         newport_wait();
 117         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 118                                  NPORT_DMODE0_CHOST);
 119
 120         npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
 121         npregs->set.xyendi = ((newport_xsize - 1) << 16);
 122         newport_wait();
 123
 124         for (i = 0; i < logo->width*logo->height; i++)
 125                 npregs->go.hostrw0 = *data++ << 24;
 126 #endif /* CONFIG_LOGO_SGI_CLUT224 */
 127 }
 128
 129 static inline void newport_clear_screen(int xstart, int ystart, int xend,
 130                                         int yend, int ci)
 131 {
 132         if (logo_active)
 133                 return;
 134
 135         newport_wait();
 136         npregs->set.wrmask = 0xffffffff;
 137         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 138                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 139                                  | NPORT_DMODE0_STOPY);
 140         npregs->set.colori = ci;
 141         npregs->set.xystarti = (xstart << 16) | ystart;
 142         npregs->go.xyendi = (xend << 16) | yend;
 143 }
 144
 145 static inline void newport_clear_lines(int ystart, int yend, int ci)
 146 {
 147         ystart = ((ystart << 4) + topscan) & 0x3ff;
 148         yend = ((yend << 4) + topscan + 15) & 0x3ff;
 149         newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
 150 }
 151
 152 void newport_reset(void)
 153 {
 154         unsigned short treg;
 155         int i;
 156
 157         newport_wait();
 158         treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 159         newport_vc2_set(npregs, VC2_IREG_CONTROL,
 160                         (treg | VC2_CTRL_EVIDEO));
 161
 162         treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
 163         newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
 164         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 165                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 166         for (i = 0; i < 128; i++) {
 167                 newport_bfwait();
 168                 if (i == 92 || i == 94)
 169                         npregs->set.dcbdata0.byshort.s1 = 0xff00;
 170                 else
 171                         npregs->set.dcbdata0.byshort.s1 = 0x0000;
 172         }
 173
 174         newport_init_cmap();
 175
 176         /* turn off popup plane */
 177         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 178                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 179         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 180         npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
 181                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 182         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 183
 184         topscan = 0;
 185         npregs->cset.topscan = 0x3ff;
 186         npregs->cset.xywin = (4096 << 16) | 4096;
 187
 188         /* Clear the screen. */
 189         newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
 190 }
 191
 192 /*
 193  * calculate the actual screen size by reading
 194  * the video timing out of the VC2
 195  */
 196 void newport_get_screensize(void)
 197 {
 198         int i, cols;
 199         unsigned short ventry, treg;
 200         unsigned short linetable[128];  /* should be enough */
 201
 202         ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
 203         newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
 204         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 205                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 206         for (i = 0; i < 128; i++) {
 207                 newport_bfwait();
 208                 linetable[i] = npregs->set.dcbdata0.byshort.s1;
 209         }
 210
 211         newport_xsize = newport_ysize = 0;
 212         for (i = 0; linetable[i + 1] && (i < sizeof(linetable)); i += 2) {
 213                 cols = 0;
 214                 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 215                 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 216                                        NPORT_DMODE_W2 | VC2_PROTOCOL);
 217                 do {
 218                         newport_bfwait();
 219                         treg = npregs->set.dcbdata0.byshort.s1;
 220                         if ((treg & 1) == 0)
 221                                 cols += (treg >> 7) & 0xfe;
 222                         if ((treg & 0x80) == 0) {
 223                                 newport_bfwait();
 224                                 treg = npregs->set.dcbdata0.byshort.s1;
 225                         }
 226                 } while ((treg & 0x8000) == 0);
 227                 if (cols) {
 228                         if (cols > newport_xsize)
 229                                 newport_xsize = cols;
 230                         newport_ysize += linetable[i + 1];
 231                 }
 232         }
 233         printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
 234 }
 235
 236 static void newport_get_revisions(void)
 237 {
 238         unsigned int tmp;
 239         unsigned int board_rev;
 240         unsigned int rex3_rev;
 241         unsigned int vc2_rev;
 242         unsigned int cmap_rev;
 243         unsigned int xmap9_rev;
 244         unsigned int bt445_rev;
 245         unsigned int bitplanes;
 246
 247         rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
 248
 249         npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
 250                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 251         tmp = npregs->set.dcbdata0.bybytes.b3;
 252         cmap_rev = tmp & 7;
 253         board_rev = (tmp >> 4) & 7;
 254         bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
 255
 256         npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
 257                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 258         tmp = npregs->set.dcbdata0.bybytes.b3;
 259         if ((tmp & 7) < cmap_rev)
 260                 cmap_rev = (tmp & 7);
 261
 262         vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
 263
 264         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 265                                XM9_CRS_REVISION | NPORT_DMODE_W1);
 266         xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
 267
 268         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 269                                BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
 270         npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
 271         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 272                                BT445_CSR_REVISION | NPORT_DMODE_W1);
 273         bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
 274
 275 #define L(a)     (char)('A'+(a))
 276         printk
 277             ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
 278              board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
 279              L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
 280 #undef L
 281
 282         if (board_rev == 3)     /* I don't know all affected revisions */
 283                 xcurs_correction = 21;
 284 }
 285
 286 /* Can't be __init, take_over_console may call it later */
 287 static const char *newport_startup(void)
 288 {
 289         int i;
 290
 291         if (!sgi_gfxaddr)
 292                 return NULL;
 293         npregs = (struct newport_regs *) (KSEG1 + sgi_gfxaddr);
 294         npregs->cset.config = NPORT_CFG_GD0;
 295
 296         if (newport_wait()) {
 297                 return NULL;
 298         }
 299
 300         npregs->set.xstarti = TESTVAL;
 301         if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
 302                 return NULL;
 303
 304         for (i = 0; i < MAX_NR_CONSOLES; i++)
 305                 font_data[i] = FONT_DATA;
 306
 307         newport_reset();
 308         newport_get_revisions();
 309         newport_get_screensize();
 310
 311         return "SGI Newport";
 312 }
 313
 314 static void newport_init(struct vc_data *vc, int init)
 315 {
 316         vc->vc_cols = newport_xsize / 8;
 317         vc->vc_rows = newport_ysize / 16;
 318         vc->vc_can_do_color = 1;
 319 }
 320
 321 static void newport_deinit(struct vc_data *c)
 322 {
 323         int i;
 324
 325         /* free memory used by user font */
 326         for (i = 0; i < MAX_NR_CONSOLES; i++)
 327                 newport_set_def_font(i, NULL);
 328 }
 329
 330 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
 331                           int width)
 332 {
 333         int xend = ((sx + width) << 3) - 1;
 334         int ystart = ((sy << 4) + topscan) & 0x3ff;
 335         int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
 336
 337         if (logo_active)
 338                 return;
 339
 340         if (ystart < yend) {
 341                 newport_clear_screen(sx << 3, ystart, xend, yend,
 342                                      (vc->vc_color & 0xf0) >> 4);
 343         } else {
 344                 newport_clear_screen(sx << 3, ystart, xend, 1023,
 345                                      (vc->vc_color & 0xf0) >> 4);
 346                 newport_clear_screen(sx << 3, 0, xend, yend,
 347                                      (vc->vc_color & 0xf0) >> 4);
 348         }
 349 }
 350
 351 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
 352                          int xpos)
 353 {
 354         unsigned char *p;
 355
 356         p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
 357         charattr = (charattr >> 8) & 0xff;
 358         xpos <<= 3;
 359         ypos <<= 4;
 360
 361         newport_render_background(xpos, ypos, xpos, ypos,
 362                                   (charattr & 0xf0) >> 4);
 363
 364         /* Set the color and drawing mode. */
 365         newport_wait();
 366         npregs->set.colori = charattr & 0xf;
 367         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 368                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 369                                  NPORT_DMODE0_L32);
 370
 371         /* Set coordinates for bitmap operation. */
 372         npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
 373         npregs->set.xyendi = ((xpos + 7) << 16);
 374         newport_wait();
 375
 376         /* Go, baby, go... */
 377         RENDER(npregs, p);
 378 }
 379
 380 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
 381                           int count, int ypos, int xpos)
 382 {
 383         int i;
 384         int charattr;
 385         unsigned char *p;
 386
 387         charattr = (scr_readw(s) >> 8) & 0xff;
 388
 389         xpos <<= 3;
 390         ypos <<= 4;
 391
 392         if (!logo_active)
 393                 /* Clear the area behing the string */
 394                 newport_render_background(xpos, ypos,
 395                                           xpos + ((count - 1) << 3), ypos,
 396                                           (charattr & 0xf0) >> 4);
 397
 398         newport_wait();
 399
 400         /* Set the color and drawing mode. */
 401         npregs->set.colori = charattr & 0xf;
 402         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 403                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 404                                  NPORT_DMODE0_L32);
 405
 406         for (i = 0; i < count; i++, xpos += 8) {
 407                 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
 408
 409                 newport_wait();
 410
 411                 /* Set coordinates for bitmap operation. */
 412                 npregs->set.xystarti =
 413                     (xpos << 16) | ((ypos + topscan) & 0x3ff);
 414                 npregs->set.xyendi = ((xpos + 7) << 16);
 415
 416                 /* Go, baby, go... */
 417                 RENDER(npregs, p);
 418         }
 419 }
 420
 421 static void newport_cursor(struct vc_data *vc, int mode)
 422 {
 423         unsigned short treg;
 424         int xcurs, ycurs;
 425
 426         switch (mode) {
 427         case CM_ERASE:
 428                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 429                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 430                                 (treg & ~(VC2_CTRL_ECDISP)));
 431                 break;
 432
 433         case CM_MOVE:
 434         case CM_DRAW:
 435                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 436                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 437                                 (treg | VC2_CTRL_ECDISP));
 438                 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
 439                 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
 440                 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
 441                 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
 442                 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
 443         }
 444 }
 445
 446 static int newport_switch(struct vc_data *vc)
 447 {
 448         static int logo_drawn = 0;
 449
 450         topscan = 0;
 451         npregs->cset.topscan = 0x3ff;
 452
 453         if (!logo_drawn) {
 454                 newport_show_logo();
 455                 logo_drawn = 1;
 456                 logo_active = 1;
 457         }
 458
 459         return 1;
 460 }
 461
 462 static int newport_blank(struct vc_data *c, int blank)
 463 {
 464         unsigned short treg;
 465
 466         if (blank == 0) {
 467                 /* unblank console */
 468                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 469                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 470                                 (treg | VC2_CTRL_EDISP));
 471         } else {
 472                 /* blank console */
 473                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 474                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 475                                 (treg & ~(VC2_CTRL_EDISP)));
 476         }
 477         return 1;
 478 }
 479
 480 static int newport_set_font(int unit, struct console_font_op *op)
 481 {
 482         int w = op->width;
 483         int h = op->height;
 484         int size = h * op->charcount;
 485         int i;
 486         unsigned char *new_data, *data = op->data, *p;
 487
 488         /* ladis: when I grow up, there will be a day... and more sizes will
 489          * be supported ;-) */
 490         if ((w != 8) || (h != 16)
 491             || (op->charcount != 256 && op->charcount != 512))
 492                 return -EINVAL;
 493
 494         if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
 495              GFP_USER))) return -ENOMEM;
 496
 497         new_data += FONT_EXTRA_WORDS * sizeof(int);
 498         FNTSIZE(new_data) = size;
 499         FNTCHARCNT(new_data) = op->charcount;
 500         REFCOUNT(new_data) = 0; /* usage counter */
 501
 502         p = new_data;
 503         for (i = 0; i < op->charcount; i++) {
 504                 memcpy(p, data, h);
 505                 data += 32;
 506                 p += h;
 507         }
 508
 509         /* check if font is already used by other console */
 510         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 511                 if (font_data[i] != FONT_DATA
 512                     && FNTSIZE(font_data[i]) == size
 513                     && !memcmp(font_data[i], new_data, size)) {
 514                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
 515                         /* current font is the same as the new one */
 516                         if (i == unit)
 517                                 return 0;
 518                         new_data = font_data[i];
 519                         break;
 520                 }
 521         }
 522         /* old font is user font */
 523         if (font_data[unit] != FONT_DATA) {
 524                 if (--REFCOUNT(font_data[unit]) == 0)
 525                         kfree(font_data[unit] -
 526                               FONT_EXTRA_WORDS * sizeof(int));
 527         }
 528         REFCOUNT(new_data)++;
 529         font_data[unit] = new_data;
 530
 531         return 0;
 532 }
 533
 534 static int newport_set_def_font(int unit, struct console_font_op *op)
 535 {
 536         if (font_data[unit] != FONT_DATA) {
 537                 if (--REFCOUNT(font_data[unit]) == 0)
 538                         kfree(font_data[unit] -
 539                               FONT_EXTRA_WORDS * sizeof(int));
 540                 font_data[unit] = FONT_DATA;
 541         }
 542
 543         return 0;
 544 }
 545
 546 static int newport_font_op(struct vc_data *vc, struct console_font_op *op)
 547 {
 548         int unit = vc->vc_num;
 549
 550         switch (op->op) {
 551         case KD_FONT_OP_SET:
 552                 return newport_set_font(unit, op);
 553         case KD_FONT_OP_SET_DEFAULT:
 554                 return newport_set_def_font(unit, op);
 555         default:
 556                 return -ENOSYS;
 557         }
 558 }
 559
 560 static int newport_set_palette(struct vc_data *vc, unsigned char *table)
 561 {
 562         return -EINVAL;
 563 }
 564
 565 static int newport_scrolldelta(struct vc_data *vc, int lines)
 566 {
 567         /* there is (nearly) no off-screen memory, so we can't scroll back */
 568         return 0;
 569 }
 570
 571 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
 572                           int lines)
 573 {
 574         int count, x, y;
 575         unsigned short *s, *d;
 576         unsigned short chattr;
 577
 578         logo_active = 0;        /* it's time to disable the logo now.. */
 579
 580         if (t == 0 && b == vc->vc_rows) {
 581                 if (dir == SM_UP) {
 582                         topscan = (topscan + (lines << 4)) & 0x3ff;
 583                         newport_clear_lines(vc->vc_rows - lines,
 584                                             vc->vc_rows - 1,
 585                                             (vc->vc_color & 0xf0) >> 4);
 586                 } else {
 587                         topscan = (topscan + (-lines << 4)) & 0x3ff;
 588                         newport_clear_lines(0, lines - 1,
 589                                             (vc->vc_color & 0xf0) >> 4);
 590                 }
 591                 npregs->cset.topscan = (topscan - 1) & 0x3ff;
 592                 return 0;
 593         }
 594
 595         count = (b - t - lines) * vc->vc_cols;
 596         if (dir == SM_UP) {
 597                 x = 0;
 598                 y = t;
 599                 s = (unsigned short *) (vc->vc_origin +
 600                                         vc->vc_size_row * (t + lines));
 601                 d = (unsigned short *) (vc->vc_origin +
 602                                         vc->vc_size_row * t);
 603                 while (count--) {
 604                         chattr = scr_readw(s++);
 605                         if (chattr != scr_readw(d)) {
 606                                 newport_putc(vc, chattr, y, x);
 607                                 scr_writew(chattr, d);
 608                         }
 609                         d++;
 610                         if (++x == vc->vc_cols) {
 611                                 x = 0;
 612                                 y++;
 613                         }
 614                 }
 615                 d = (unsigned short *) (vc->vc_origin +
 616                                         vc->vc_size_row * (b - lines));
 617                 x = 0;
 618                 y = b - lines;
 619                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 620                         if (scr_readw(d) != vc->vc_video_erase_char) {
 621                                 newport_putc(vc, vc->vc_video_erase_char,
 622                                              y, x);
 623                                 scr_writew(vc->vc_video_erase_char, d);
 624                         }
 625                         d++;
 626                         if (++x == vc->vc_cols) {
 627                                 x = 0;
 628                                 y++;
 629                         }
 630                 }
 631         } else {
 632                 x = vc->vc_cols - 1;
 633                 y = b - 1;
 634                 s = (unsigned short *) (vc->vc_origin +
 635                                         vc->vc_size_row * (b - lines) - 2);
 636                 d = (unsigned short *) (vc->vc_origin +
 637                                         vc->vc_size_row * b - 2);
 638                 while (count--) {
 639                         chattr = scr_readw(s--);
 640                         if (chattr != scr_readw(d)) {
 641                                 newport_putc(vc, chattr, y, x);
 642                                 scr_writew(chattr, d);
 643                         }
 644                         d--;
 645                         if (x-- == 0) {
 646                                 x = vc->vc_cols - 1;
 647                                 y--;
 648                         }
 649                 }
 650                 d = (unsigned short *) (vc->vc_origin +
 651                                         vc->vc_size_row * t);
 652                 x = 0;
 653                 y = t;
 654                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 655                         if (scr_readw(d) != vc->vc_video_erase_char) {
 656                                 newport_putc(vc, vc->vc_video_erase_char,
 657                                              y, x);
 658                                 scr_writew(vc->vc_video_erase_char, d);
 659                         }
 660                         d++;
 661                         if (++x == vc->vc_cols) {
 662                                 x = 0;
 663                                 y++;
 664                         }
 665                 }
 666         }
 667         return 1;
 668 }
 669
 670 static void newport_bmove(struct vc_data *vc, int sy, int sx, int dy,
 671                           int dx, int h, int w)
 672 {
 673         short xs, ys, xe, ye, xoffs, yoffs, tmp;
 674
 675         xs = sx << 3;
 676         xe = ((sx + w) << 3) - 1;
 677         /*
 678          * as bmove is only used to move stuff around in the same line
 679          * (h == 1), we don't care about wrap arounds caused by topscan != 0
 680          */
 681         ys = ((sy << 4) + topscan) & 0x3ff;
 682         ye = (((sy + h) << 4) - 1 + topscan) & 0x3ff;
 683         xoffs = (dx - sx) << 3;
 684         yoffs = (dy - sy) << 4;
 685         if (xoffs > 0) {
 686                 /* move to the right, exchange starting points */
 687                 tmp = xe;
 688                 xe = xs;
 689                 xs = tmp;
 690         }
 691         newport_wait();
 692         npregs->set.drawmode0 = (NPORT_DMODE0_S2S | NPORT_DMODE0_BLOCK |
 693                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 694                                  | NPORT_DMODE0_STOPY);
 695         npregs->set.xystarti = (xs << 16) | ys;
 696         npregs->set.xyendi = (xe << 16) | ye;
 697         npregs->go.xymove = (xoffs << 16) | yoffs;
 698 }
 699
 700 static int newport_dummy(struct vc_data *c)
 701 {
 702         return 0;
 703 }
 704
 705 #define DUMMY (void *) newport_dummy
 706
 707 const struct consw newport_con = {
 708     .owner =            THIS_MODULE,
 709     .con_startup =      newport_startup,
 710     .con_init =         newport_init,
 711     .con_deinit =       newport_deinit,
 712     .con_clear =        newport_clear,
 713     .con_putc =         newport_putc,
 714     .con_putcs =        newport_putcs,
 715     .con_cursor =       newport_cursor,
 716     .con_scroll =       newport_scroll,
 717     .con_bmove =        newport_bmove,
 718     .con_switch =       newport_switch,
 719     .con_blank =        newport_blank,
 720     .con_font_op =      newport_font_op,
 721     .con_set_palette =  newport_set_palette,
 722     .con_scrolldelta =  newport_scrolldelta,
 723     .con_set_origin =   DUMMY,
 724     .con_save_screen =  DUMMY
 725 };
 726
 727 #ifdef MODULE
 728 static int __init newport_console_init(void)
 729 {
 730         return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 731 }
 732
 733 static void __exit newport_console_exit(void)
 734 {
 735         give_up_console(&newport_con);
 736 }
 737
 738 module_init(newport_console_init);
 739 module_exit(newport_console_exit);
 740 #endif
 741
 742 MODULE_LICENSE("GPL");