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 (davem@davemloft.net)
  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/kd.h>
  16 #include <linux/selection.h>
  17 #include <linux/console.h>
  18 #include <linux/vt_kern.h>
  19 #include <linux/mm.h>
  20 #include <linux/module.h>
  21 #include <linux/slab.h>
  22
  23 #include <asm/io.h>
  24 #include <asm/uaccess.h>
  25 #include <asm/page.h>
  26 #include <asm/pgtable.h>
  27 #include <asm/gio_device.h>
  28
  29 #include <video/newport.h>
  30
  31 #include <linux/linux_logo.h>
  32 #include <linux/font.h>
  33
  34 #define NEWPORT_LEN     0x10000
  35
  36 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
  37
  38 static unsigned char *font_data[MAX_NR_CONSOLES];
  39
  40 static struct newport_regs *npregs;
  41 static unsigned long newport_addr;
  42
  43 static int logo_active;
  44 static int topscan;
  45 static int xcurs_correction = 29;
  46 static int newport_xsize;
  47 static int newport_ysize;
  48 static int newport_has_init;
  49
  50 static int newport_set_def_font(int unit, struct console_font *op);
  51
  52 #define BMASK(c) (c << 24)
  53
  54 #define RENDER(regs, cp) do { \
  55 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
  56 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
  57 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
  58 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
  59 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
  60 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
  61 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
  62 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
  63 } while(0)
  64
  65 #define TESTVAL 0xdeadbeef
  66 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
  67
  68 static inline void newport_render_background(int xstart, int ystart,
  69                                              int xend, int yend, int ci)
  70 {
  71         newport_wait(npregs);
  72         npregs->set.wrmask = 0xffffffff;
  73         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
  74                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
  75                                  | NPORT_DMODE0_STOPY);
  76         npregs->set.colori = ci;
  77         npregs->set.xystarti =
  78             (xstart << 16) | ((ystart + topscan) & 0x3ff);
  79         npregs->go.xyendi =
  80             ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
  81 }
  82
  83 static inline void newport_init_cmap(void)
  84 {
  85         unsigned short i;
  86
  87         for (i = 0; i < 16; i++) {
  88                 newport_bfwait(npregs);
  89                 newport_cmap_setaddr(npregs, color_table[i]);
  90                 newport_cmap_setrgb(npregs,
  91                                     default_red[i],
  92                                     default_grn[i], default_blu[i]);
  93         }
  94 }
  95
  96 static const struct linux_logo *newport_show_logo(void)
  97 {
  98 #ifdef CONFIG_LOGO_SGI_CLUT224
  99         const struct linux_logo *logo = fb_find_logo(8);
 100         const unsigned char *clut;
 101         const unsigned char *data;
 102         unsigned long i;
 103
 104         if (!logo)
 105                 return NULL;
 106         clut = logo->clut;
 107         data = logo->data;
 108
 109         for (i = 0; i < logo->clutsize; i++) {
 110                 newport_bfwait(npregs);
 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(npregs);
 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(npregs);
 123
 124         for (i = 0; i < logo->width*logo->height; i++)
 125                 npregs->go.hostrw0 = *data++ << 24;
 126
 127         return logo;
 128 #endif /* CONFIG_LOGO_SGI_CLUT224 */
 129 }
 130
 131 static inline void newport_clear_screen(int xstart, int ystart, int xend,
 132                                         int yend, int ci)
 133 {
 134         if (logo_active)
 135                 return;
 136
 137         newport_wait(npregs);
 138         npregs->set.wrmask = 0xffffffff;
 139         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 140                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 141                                  | NPORT_DMODE0_STOPY);
 142         npregs->set.colori = ci;
 143         npregs->set.xystarti = (xstart << 16) | ystart;
 144         npregs->go.xyendi = (xend << 16) | yend;
 145 }
 146
 147 static inline void newport_clear_lines(int ystart, int yend, int ci)
 148 {
 149         ystart = ((ystart << 4) + topscan) & 0x3ff;
 150         yend = ((yend << 4) + topscan + 15) & 0x3ff;
 151         newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
 152 }
 153
 154 static void newport_reset(void)
 155 {
 156         unsigned short treg;
 157         int i;
 158
 159         newport_wait(npregs);
 160         treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 161         newport_vc2_set(npregs, VC2_IREG_CONTROL,
 162                         (treg | VC2_CTRL_EVIDEO));
 163
 164         treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
 165         newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
 166         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 167                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 168         for (i = 0; i < 128; i++) {
 169                 newport_bfwait(npregs);
 170                 if (i == 92 || i == 94)
 171                         npregs->set.dcbdata0.byshort.s1 = 0xff00;
 172                 else
 173                         npregs->set.dcbdata0.byshort.s1 = 0x0000;
 174         }
 175
 176         newport_init_cmap();
 177
 178         /* turn off popup plane */
 179         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 180                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 181         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 182         npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
 183                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 184         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 185
 186         topscan = 0;
 187         npregs->cset.topscan = 0x3ff;
 188         npregs->cset.xywin = (4096 << 16) | 4096;
 189
 190         /* Clear the screen. */
 191         newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
 192 }
 193
 194 /*
 195  * calculate the actual screen size by reading
 196  * the video timing out of the VC2
 197  */
 198 static void newport_get_screensize(void)
 199 {
 200         int i, cols;
 201         unsigned short ventry, treg;
 202         unsigned short linetable[128];  /* should be enough */
 203
 204         ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
 205         newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
 206         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 207                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 208         for (i = 0; i < 128; i++) {
 209                 newport_bfwait(npregs);
 210                 linetable[i] = npregs->set.dcbdata0.byshort.s1;
 211         }
 212
 213         newport_xsize = newport_ysize = 0;
 214         for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
 215                 cols = 0;
 216                 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 217                 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 218                                        NPORT_DMODE_W2 | VC2_PROTOCOL);
 219                 do {
 220                         newport_bfwait(npregs);
 221                         treg = npregs->set.dcbdata0.byshort.s1;
 222                         if ((treg & 1) == 0)
 223                                 cols += (treg >> 7) & 0xfe;
 224                         if ((treg & 0x80) == 0) {
 225                                 newport_bfwait(npregs);
 226                                 treg = npregs->set.dcbdata0.byshort.s1;
 227                         }
 228                 } while ((treg & 0x8000) == 0);
 229                 if (cols) {
 230                         if (cols > newport_xsize)
 231                                 newport_xsize = cols;
 232                         newport_ysize += linetable[i + 1];
 233                 }
 234         }
 235         printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
 236 }
 237
 238 static void newport_get_revisions(void)
 239 {
 240         unsigned int tmp;
 241         unsigned int board_rev;
 242         unsigned int rex3_rev;
 243         unsigned int vc2_rev;
 244         unsigned int cmap_rev;
 245         unsigned int xmap9_rev;
 246         unsigned int bt445_rev;
 247         unsigned int bitplanes;
 248
 249         rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
 250
 251         npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
 252                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 253         tmp = npregs->set.dcbdata0.bybytes.b3;
 254         cmap_rev = tmp & 7;
 255         board_rev = (tmp >> 4) & 7;
 256         bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
 257
 258         npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
 259                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 260         tmp = npregs->set.dcbdata0.bybytes.b3;
 261         if ((tmp & 7) < cmap_rev)
 262                 cmap_rev = (tmp & 7);
 263
 264         vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
 265
 266         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 267                                XM9_CRS_REVISION | NPORT_DMODE_W1);
 268         xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
 269
 270         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 271                                BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
 272         npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
 273         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 274                                BT445_CSR_REVISION | NPORT_DMODE_W1);
 275         bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
 276
 277 #define L(a)     (char)('A'+(a))
 278         printk
 279             ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
 280              board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
 281              L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
 282 #undef L
 283
 284         if (board_rev == 3)     /* I don't know all affected revisions */
 285                 xcurs_correction = 21;
 286 }
 287
 288 static void newport_exit(void)
 289 {
 290         int i;
 291
 292         /* free memory used by user font */
 293         for (i = 0; i < MAX_NR_CONSOLES; i++)
 294                 newport_set_def_font(i, NULL);
 295 }
 296
 297 /* Can't be __init, do_take_over_console may call it later */
 298 static const char *newport_startup(void)
 299 {
 300         int i;
 301
 302         npregs->cset.config = NPORT_CFG_GD0;
 303
 304         if (newport_wait(npregs))
 305                 goto out_unmap;
 306
 307         npregs->set.xstarti = TESTVAL;
 308         if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
 309                 goto out_unmap;
 310
 311         for (i = 0; i < MAX_NR_CONSOLES; i++)
 312                 font_data[i] = FONT_DATA;
 313
 314         newport_reset();
 315         newport_get_revisions();
 316         newport_get_screensize();
 317         newport_has_init = 1;
 318
 319         return "SGI Newport";
 320
 321 out_unmap:
 322         return NULL;
 323 }
 324
 325 static void newport_init(struct vc_data *vc, int init)
 326 {
 327         int cols, rows;
 328
 329         cols = newport_xsize / 8;
 330         rows = newport_ysize / 16;
 331         vc->vc_can_do_color = 1;
 332         if (init) {
 333                 vc->vc_cols = cols;
 334                 vc->vc_rows = rows;
 335         } else
 336                 vc_resize(vc, cols, rows);
 337 }
 338
 339 static void newport_deinit(struct vc_data *c)
 340 {
 341         if (!con_is_bound(&newport_con) && newport_has_init) {
 342                 newport_exit();
 343                 newport_has_init = 0;
 344         }
 345 }
 346
 347 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
 348                           int width)
 349 {
 350         int xend = ((sx + width) << 3) - 1;
 351         int ystart = ((sy << 4) + topscan) & 0x3ff;
 352         int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
 353
 354         if (logo_active)
 355                 return;
 356
 357         if (ystart < yend) {
 358                 newport_clear_screen(sx << 3, ystart, xend, yend,
 359                                      (vc->vc_color & 0xf0) >> 4);
 360         } else {
 361                 newport_clear_screen(sx << 3, ystart, xend, 1023,
 362                                      (vc->vc_color & 0xf0) >> 4);
 363                 newport_clear_screen(sx << 3, 0, xend, yend,
 364                                      (vc->vc_color & 0xf0) >> 4);
 365         }
 366 }
 367
 368 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
 369                          int xpos)
 370 {
 371         unsigned char *p;
 372
 373         p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
 374         charattr = (charattr >> 8) & 0xff;
 375         xpos <<= 3;
 376         ypos <<= 4;
 377
 378         newport_render_background(xpos, ypos, xpos, ypos,
 379                                   (charattr & 0xf0) >> 4);
 380
 381         /* Set the color and drawing mode. */
 382         newport_wait(npregs);
 383         npregs->set.colori = charattr & 0xf;
 384         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 385                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 386                                  NPORT_DMODE0_L32);
 387
 388         /* Set coordinates for bitmap operation. */
 389         npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
 390         npregs->set.xyendi = ((xpos + 7) << 16);
 391         newport_wait(npregs);
 392
 393         /* Go, baby, go... */
 394         RENDER(npregs, p);
 395 }
 396
 397 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
 398                           int count, int ypos, int xpos)
 399 {
 400         int i;
 401         int charattr;
 402         unsigned char *p;
 403
 404         charattr = (scr_readw(s) >> 8) & 0xff;
 405
 406         xpos <<= 3;
 407         ypos <<= 4;
 408
 409         if (!logo_active)
 410                 /* Clear the area behing the string */
 411                 newport_render_background(xpos, ypos,
 412                                           xpos + ((count - 1) << 3), ypos,
 413                                           (charattr & 0xf0) >> 4);
 414
 415         newport_wait(npregs);
 416
 417         /* Set the color and drawing mode. */
 418         npregs->set.colori = charattr & 0xf;
 419         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 420                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 421                                  NPORT_DMODE0_L32);
 422
 423         for (i = 0; i < count; i++, xpos += 8) {
 424                 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
 425
 426                 newport_wait(npregs);
 427
 428                 /* Set coordinates for bitmap operation. */
 429                 npregs->set.xystarti =
 430                     (xpos << 16) | ((ypos + topscan) & 0x3ff);
 431                 npregs->set.xyendi = ((xpos + 7) << 16);
 432
 433                 /* Go, baby, go... */
 434                 RENDER(npregs, p);
 435         }
 436 }
 437
 438 static void newport_cursor(struct vc_data *vc, int mode)
 439 {
 440         unsigned short treg;
 441         int xcurs, ycurs;
 442
 443         switch (mode) {
 444         case CM_ERASE:
 445                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 446                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 447                                 (treg & ~(VC2_CTRL_ECDISP)));
 448                 break;
 449
 450         case CM_MOVE:
 451         case CM_DRAW:
 452                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 453                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 454                                 (treg | VC2_CTRL_ECDISP));
 455                 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
 456                 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
 457                 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
 458                 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
 459                 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
 460         }
 461 }
 462
 463 static int newport_switch(struct vc_data *vc)
 464 {
 465         static int logo_drawn = 0;
 466
 467         topscan = 0;
 468         npregs->cset.topscan = 0x3ff;
 469
 470         if (!logo_drawn) {
 471                 if (newport_show_logo()) {
 472                         logo_drawn = 1;
 473                         logo_active = 1;
 474                 }
 475         }
 476
 477         return 1;
 478 }
 479
 480 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
 481 {
 482         unsigned short treg;
 483
 484         if (blank == 0) {
 485                 /* unblank console */
 486                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 487                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 488                                 (treg | VC2_CTRL_EDISP));
 489         } else {
 490                 /* blank console */
 491                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 492                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 493                                 (treg & ~(VC2_CTRL_EDISP)));
 494         }
 495         return 1;
 496 }
 497
 498 static int newport_set_font(int unit, struct console_font *op)
 499 {
 500         int w = op->width;
 501         int h = op->height;
 502         int size = h * op->charcount;
 503         int i;
 504         unsigned char *new_data, *data = op->data, *p;
 505
 506         /* ladis: when I grow up, there will be a day... and more sizes will
 507          * be supported ;-) */
 508         if ((w != 8) || (h != 16)
 509             || (op->charcount != 256 && op->charcount != 512))
 510                 return -EINVAL;
 511
 512         if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
 513              GFP_USER))) return -ENOMEM;
 514
 515         new_data += FONT_EXTRA_WORDS * sizeof(int);
 516         FNTSIZE(new_data) = size;
 517         FNTCHARCNT(new_data) = op->charcount;
 518         REFCOUNT(new_data) = 0; /* usage counter */
 519         FNTSUM(new_data) = 0;
 520
 521         p = new_data;
 522         for (i = 0; i < op->charcount; i++) {
 523                 memcpy(p, data, h);
 524                 data += 32;
 525                 p += h;
 526         }
 527
 528         /* check if font is already used by other console */
 529         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 530                 if (font_data[i] != FONT_DATA
 531                     && FNTSIZE(font_data[i]) == size
 532                     && !memcmp(font_data[i], new_data, size)) {
 533                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
 534                         /* current font is the same as the new one */
 535                         if (i == unit)
 536                                 return 0;
 537                         new_data = font_data[i];
 538                         break;
 539                 }
 540         }
 541         /* old font is user font */
 542         if (font_data[unit] != FONT_DATA) {
 543                 if (--REFCOUNT(font_data[unit]) == 0)
 544                         kfree(font_data[unit] -
 545                               FONT_EXTRA_WORDS * sizeof(int));
 546         }
 547         REFCOUNT(new_data)++;
 548         font_data[unit] = new_data;
 549
 550         return 0;
 551 }
 552
 553 static int newport_set_def_font(int unit, struct console_font *op)
 554 {
 555         if (font_data[unit] != FONT_DATA) {
 556                 if (--REFCOUNT(font_data[unit]) == 0)
 557                         kfree(font_data[unit] -
 558                               FONT_EXTRA_WORDS * sizeof(int));
 559                 font_data[unit] = FONT_DATA;
 560         }
 561
 562         return 0;
 563 }
 564
 565 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
 566 {
 567         return newport_set_def_font(vc->vc_num, op);
 568 }
 569
 570 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
 571 {
 572         return newport_set_font(vc->vc_num, font);
 573 }
 574
 575 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
 576                           int lines)
 577 {
 578         int count, x, y;
 579         unsigned short *s, *d;
 580         unsigned short chattr;
 581
 582         logo_active = 0;        /* it's time to disable the logo now.. */
 583
 584         if (t == 0 && b == vc->vc_rows) {
 585                 if (dir == SM_UP) {
 586                         topscan = (topscan + (lines << 4)) & 0x3ff;
 587                         newport_clear_lines(vc->vc_rows - lines,
 588                                             vc->vc_rows - 1,
 589                                             (vc->vc_color & 0xf0) >> 4);
 590                 } else {
 591                         topscan = (topscan + (-lines << 4)) & 0x3ff;
 592                         newport_clear_lines(0, lines - 1,
 593                                             (vc->vc_color & 0xf0) >> 4);
 594                 }
 595                 npregs->cset.topscan = (topscan - 1) & 0x3ff;
 596                 return 0;
 597         }
 598
 599         count = (b - t - lines) * vc->vc_cols;
 600         if (dir == SM_UP) {
 601                 x = 0;
 602                 y = t;
 603                 s = (unsigned short *) (vc->vc_origin +
 604                                         vc->vc_size_row * (t + lines));
 605                 d = (unsigned short *) (vc->vc_origin +
 606                                         vc->vc_size_row * t);
 607                 while (count--) {
 608                         chattr = scr_readw(s++);
 609                         if (chattr != scr_readw(d)) {
 610                                 newport_putc(vc, chattr, y, x);
 611                                 scr_writew(chattr, d);
 612                         }
 613                         d++;
 614                         if (++x == vc->vc_cols) {
 615                                 x = 0;
 616                                 y++;
 617                         }
 618                 }
 619                 d = (unsigned short *) (vc->vc_origin +
 620                                         vc->vc_size_row * (b - lines));
 621                 x = 0;
 622                 y = b - lines;
 623                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 624                         if (scr_readw(d) != vc->vc_video_erase_char) {
 625                                 newport_putc(vc, vc->vc_video_erase_char,
 626                                              y, x);
 627                                 scr_writew(vc->vc_video_erase_char, d);
 628                         }
 629                         d++;
 630                         if (++x == vc->vc_cols) {
 631                                 x = 0;
 632                                 y++;
 633                         }
 634                 }
 635         } else {
 636                 x = vc->vc_cols - 1;
 637                 y = b - 1;
 638                 s = (unsigned short *) (vc->vc_origin +
 639                                         vc->vc_size_row * (b - lines) - 2);
 640                 d = (unsigned short *) (vc->vc_origin +
 641                                         vc->vc_size_row * b - 2);
 642                 while (count--) {
 643                         chattr = scr_readw(s--);
 644                         if (chattr != scr_readw(d)) {
 645                                 newport_putc(vc, chattr, y, x);
 646                                 scr_writew(chattr, d);
 647                         }
 648                         d--;
 649                         if (x-- == 0) {
 650                                 x = vc->vc_cols - 1;
 651                                 y--;
 652                         }
 653                 }
 654                 d = (unsigned short *) (vc->vc_origin +
 655                                         vc->vc_size_row * t);
 656                 x = 0;
 657                 y = t;
 658                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 659                         if (scr_readw(d) != vc->vc_video_erase_char) {
 660                                 newport_putc(vc, vc->vc_video_erase_char,
 661                                              y, x);
 662                                 scr_writew(vc->vc_video_erase_char, d);
 663                         }
 664                         d++;
 665                         if (++x == vc->vc_cols) {
 666                                 x = 0;
 667                                 y++;
 668                         }
 669                 }
 670         }
 671         return 1;
 672 }
 673
 674 static int newport_dummy(struct vc_data *c)
 675 {
 676         return 0;
 677 }
 678
 679 #define DUMMY (void *) newport_dummy
 680
 681 const struct consw newport_con = {
 682         .owner            = THIS_MODULE,
 683         .con_startup      = newport_startup,
 684         .con_init         = newport_init,
 685         .con_deinit       = newport_deinit,
 686         .con_clear        = newport_clear,
 687         .con_putc         = newport_putc,
 688         .con_putcs        = newport_putcs,
 689         .con_cursor       = newport_cursor,
 690         .con_scroll       = newport_scroll,
 691         .con_switch       = newport_switch,
 692         .con_blank        = newport_blank,
 693         .con_font_set     = newport_font_set,
 694         .con_font_default = newport_font_default,
 695         .con_set_origin   = DUMMY,
 696         .con_save_screen  = DUMMY
 697 };
 698
 699 static int newport_probe(struct gio_device *dev,
 700                          const struct gio_device_id *id)
 701 {
 702         int err;
 703
 704         if (!dev->resource.start)
 705                 return -EINVAL;
 706
 707         if (npregs)
 708                 return -EBUSY; /* we only support one Newport as console */
 709
 710         newport_addr = dev->resource.start + 0xF0000;
 711         if (!request_mem_region(newport_addr, NEWPORT_LEN, "Newport"))
 712                 return -ENODEV;
 713
 714         npregs = (struct newport_regs *)/* ioremap cannot fail */
 715                 ioremap(newport_addr, sizeof(struct newport_regs));
 716         console_lock();
 717         err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 718         console_unlock();
 719
 720         if (err) {
 721                 iounmap((void *)npregs);
 722                 release_mem_region(newport_addr, NEWPORT_LEN);
 723         }
 724         return err;
 725 }
 726
 727 static void newport_remove(struct gio_device *dev)
 728 {
 729         give_up_console(&newport_con);
 730         iounmap((void *)npregs);
 731         release_mem_region(newport_addr, NEWPORT_LEN);
 732 }
 733
 734 static struct gio_device_id newport_ids[] = {
 735         { .id = 0x7e },
 736         { .id = 0xff }
 737 };
 738
 739 MODULE_ALIAS("gio:7e");
 740
 741 static struct gio_driver newport_driver = {
 742         .name = "newport",
 743         .id_table = newport_ids,
 744         .probe = newport_probe,
 745         .remove = newport_remove,
 746 };
 747
 748 int __init newport_console_init(void)
 749 {
 750         return gio_register_driver(&newport_driver);
 751 }
 752
 753 void __exit newport_console_exit(void)
 754 {
 755         gio_unregister_driver(&newport_driver);
 756 }
 757
 758 module_init(newport_console_init);
 759 module_exit(newport_console_exit);
 760
 761 MODULE_LICENSE("GPL");