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/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/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 unsigned long sgi_gfxaddr;
  35
  36 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
  37
  38 /* borrowed from fbcon.c */
  39 #define REFCOUNT(fd)    (((int *)(fd))[-1])
  40 #define FNTSIZE(fd)     (((int *)(fd))[-2])
  41 #define FNTCHARCNT(fd)  (((int *)(fd))[-3])
  42 #define FONT_EXTRA_WORDS 3
  43
  44 static unsigned char *font_data[MAX_NR_CONSOLES];
  45
  46 static struct newport_regs *npregs;
  47
  48 static int logo_active;
  49 static int topscan;
  50 static int xcurs_correction = 29;
  51 static int newport_xsize;
  52 static int newport_ysize;
  53 static int newport_has_init;
  54
  55 static int newport_set_def_font(int unit, struct console_font *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(npregs);
  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(npregs);
  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 const struct linux_logo *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;
 106         const unsigned char *data;
 107         unsigned long i;
 108
 109         if (!logo)
 110                 return NULL;
 111         clut = logo->clut;
 112         data = logo->data;
 113
 114         for (i = 0; i < logo->clutsize; i++) {
 115                 newport_bfwait(npregs);
 116                 newport_cmap_setaddr(npregs, i + 0x20);
 117                 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
 118                 clut += 3;
 119         }
 120
 121         newport_wait(npregs);
 122         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 123                                  NPORT_DMODE0_CHOST);
 124
 125         npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
 126         npregs->set.xyendi = ((newport_xsize - 1) << 16);
 127         newport_wait(npregs);
 128
 129         for (i = 0; i < logo->width*logo->height; i++)
 130                 npregs->go.hostrw0 = *data++ << 24;
 131
 132         return logo;
 133 #endif /* CONFIG_LOGO_SGI_CLUT224 */
 134 }
 135
 136 static inline void newport_clear_screen(int xstart, int ystart, int xend,
 137                                         int yend, int ci)
 138 {
 139         if (logo_active)
 140                 return;
 141
 142         newport_wait(npregs);
 143         npregs->set.wrmask = 0xffffffff;
 144         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 145                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 146                                  | NPORT_DMODE0_STOPY);
 147         npregs->set.colori = ci;
 148         npregs->set.xystarti = (xstart << 16) | ystart;
 149         npregs->go.xyendi = (xend << 16) | yend;
 150 }
 151
 152 static inline void newport_clear_lines(int ystart, int yend, int ci)
 153 {
 154         ystart = ((ystart << 4) + topscan) & 0x3ff;
 155         yend = ((yend << 4) + topscan + 15) & 0x3ff;
 156         newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
 157 }
 158
 159 static void newport_reset(void)
 160 {
 161         unsigned short treg;
 162         int i;
 163
 164         newport_wait(npregs);
 165         treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 166         newport_vc2_set(npregs, VC2_IREG_CONTROL,
 167                         (treg | VC2_CTRL_EVIDEO));
 168
 169         treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
 170         newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
 171         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 172                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 173         for (i = 0; i < 128; i++) {
 174                 newport_bfwait(npregs);
 175                 if (i == 92 || i == 94)
 176                         npregs->set.dcbdata0.byshort.s1 = 0xff00;
 177                 else
 178                         npregs->set.dcbdata0.byshort.s1 = 0x0000;
 179         }
 180
 181         newport_init_cmap();
 182
 183         /* turn off popup plane */
 184         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 185                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 186         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 187         npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
 188                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 189         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 190
 191         topscan = 0;
 192         npregs->cset.topscan = 0x3ff;
 193         npregs->cset.xywin = (4096 << 16) | 4096;
 194
 195         /* Clear the screen. */
 196         newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
 197 }
 198
 199 /*
 200  * calculate the actual screen size by reading
 201  * the video timing out of the VC2
 202  */
 203 static void newport_get_screensize(void)
 204 {
 205         int i, cols;
 206         unsigned short ventry, treg;
 207         unsigned short linetable[128];  /* should be enough */
 208
 209         ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
 210         newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
 211         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 212                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 213         for (i = 0; i < 128; i++) {
 214                 newport_bfwait(npregs);
 215                 linetable[i] = npregs->set.dcbdata0.byshort.s1;
 216         }
 217
 218         newport_xsize = newport_ysize = 0;
 219         for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
 220                 cols = 0;
 221                 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 222                 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 223                                        NPORT_DMODE_W2 | VC2_PROTOCOL);
 224                 do {
 225                         newport_bfwait(npregs);
 226                         treg = npregs->set.dcbdata0.byshort.s1;
 227                         if ((treg & 1) == 0)
 228                                 cols += (treg >> 7) & 0xfe;
 229                         if ((treg & 0x80) == 0) {
 230                                 newport_bfwait(npregs);
 231                                 treg = npregs->set.dcbdata0.byshort.s1;
 232                         }
 233                 } while ((treg & 0x8000) == 0);
 234                 if (cols) {
 235                         if (cols > newport_xsize)
 236                                 newport_xsize = cols;
 237                         newport_ysize += linetable[i + 1];
 238                 }
 239         }
 240         printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
 241 }
 242
 243 static void newport_get_revisions(void)
 244 {
 245         unsigned int tmp;
 246         unsigned int board_rev;
 247         unsigned int rex3_rev;
 248         unsigned int vc2_rev;
 249         unsigned int cmap_rev;
 250         unsigned int xmap9_rev;
 251         unsigned int bt445_rev;
 252         unsigned int bitplanes;
 253
 254         rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
 255
 256         npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
 257                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 258         tmp = npregs->set.dcbdata0.bybytes.b3;
 259         cmap_rev = tmp & 7;
 260         board_rev = (tmp >> 4) & 7;
 261         bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
 262
 263         npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
 264                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 265         tmp = npregs->set.dcbdata0.bybytes.b3;
 266         if ((tmp & 7) < cmap_rev)
 267                 cmap_rev = (tmp & 7);
 268
 269         vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
 270
 271         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 272                                XM9_CRS_REVISION | NPORT_DMODE_W1);
 273         xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
 274
 275         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 276                                BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
 277         npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
 278         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 279                                BT445_CSR_REVISION | NPORT_DMODE_W1);
 280         bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
 281
 282 #define L(a)     (char)('A'+(a))
 283         printk
 284             ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
 285              board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
 286              L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
 287 #undef L
 288
 289         if (board_rev == 3)     /* I don't know all affected revisions */
 290                 xcurs_correction = 21;
 291 }
 292
 293 static void newport_exit(void)
 294 {
 295         int i;
 296
 297         /* free memory used by user font */
 298         for (i = 0; i < MAX_NR_CONSOLES; i++)
 299                 newport_set_def_font(i, NULL);
 300 }
 301
 302 /* Can't be __init, take_over_console may call it later */
 303 static const char *newport_startup(void)
 304 {
 305         int i;
 306
 307         if (!sgi_gfxaddr)
 308                 return NULL;
 309
 310         if (!npregs)
 311                 npregs = (struct newport_regs *)/* ioremap cannot fail */
 312                         ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
 313         npregs->cset.config = NPORT_CFG_GD0;
 314
 315         if (newport_wait(npregs))
 316                 goto out_unmap;
 317
 318         npregs->set.xstarti = TESTVAL;
 319         if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
 320                 goto out_unmap;
 321
 322         for (i = 0; i < MAX_NR_CONSOLES; i++)
 323                 font_data[i] = FONT_DATA;
 324
 325         newport_reset();
 326         newport_get_revisions();
 327         newport_get_screensize();
 328         newport_has_init = 1;
 329
 330         return "SGI Newport";
 331
 332 out_unmap:
 333         return NULL;
 334 }
 335
 336 static void newport_init(struct vc_data *vc, int init)
 337 {
 338         vc->vc_cols = newport_xsize / 8;
 339         vc->vc_rows = newport_ysize / 16;
 340         vc->vc_can_do_color = 1;
 341 }
 342
 343 static void newport_deinit(struct vc_data *c)
 344 {
 345         if (!con_is_bound(&newport_con) && newport_has_init) {
 346                 newport_exit();
 347                 newport_has_init = 0;
 348         }
 349 }
 350
 351 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
 352                           int width)
 353 {
 354         int xend = ((sx + width) << 3) - 1;
 355         int ystart = ((sy << 4) + topscan) & 0x3ff;
 356         int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
 357
 358         if (logo_active)
 359                 return;
 360
 361         if (ystart < yend) {
 362                 newport_clear_screen(sx << 3, ystart, xend, yend,
 363                                      (vc->vc_color & 0xf0) >> 4);
 364         } else {
 365                 newport_clear_screen(sx << 3, ystart, xend, 1023,
 366                                      (vc->vc_color & 0xf0) >> 4);
 367                 newport_clear_screen(sx << 3, 0, xend, yend,
 368                                      (vc->vc_color & 0xf0) >> 4);
 369         }
 370 }
 371
 372 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
 373                          int xpos)
 374 {
 375         unsigned char *p;
 376
 377         p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
 378         charattr = (charattr >> 8) & 0xff;
 379         xpos <<= 3;
 380         ypos <<= 4;
 381
 382         newport_render_background(xpos, ypos, xpos, ypos,
 383                                   (charattr & 0xf0) >> 4);
 384
 385         /* Set the color and drawing mode. */
 386         newport_wait(npregs);
 387         npregs->set.colori = charattr & 0xf;
 388         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 389                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 390                                  NPORT_DMODE0_L32);
 391
 392         /* Set coordinates for bitmap operation. */
 393         npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
 394         npregs->set.xyendi = ((xpos + 7) << 16);
 395         newport_wait(npregs);
 396
 397         /* Go, baby, go... */
 398         RENDER(npregs, p);
 399 }
 400
 401 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
 402                           int count, int ypos, int xpos)
 403 {
 404         int i;
 405         int charattr;
 406         unsigned char *p;
 407
 408         charattr = (scr_readw(s) >> 8) & 0xff;
 409
 410         xpos <<= 3;
 411         ypos <<= 4;
 412
 413         if (!logo_active)
 414                 /* Clear the area behing the string */
 415                 newport_render_background(xpos, ypos,
 416                                           xpos + ((count - 1) << 3), ypos,
 417                                           (charattr & 0xf0) >> 4);
 418
 419         newport_wait(npregs);
 420
 421         /* Set the color and drawing mode. */
 422         npregs->set.colori = charattr & 0xf;
 423         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 424                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 425                                  NPORT_DMODE0_L32);
 426
 427         for (i = 0; i < count; i++, xpos += 8) {
 428                 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
 429
 430                 newport_wait(npregs);
 431
 432                 /* Set coordinates for bitmap operation. */
 433                 npregs->set.xystarti =
 434                     (xpos << 16) | ((ypos + topscan) & 0x3ff);
 435                 npregs->set.xyendi = ((xpos + 7) << 16);
 436
 437                 /* Go, baby, go... */
 438                 RENDER(npregs, p);
 439         }
 440 }
 441
 442 static void newport_cursor(struct vc_data *vc, int mode)
 443 {
 444         unsigned short treg;
 445         int xcurs, ycurs;
 446
 447         switch (mode) {
 448         case CM_ERASE:
 449                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 450                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 451                                 (treg & ~(VC2_CTRL_ECDISP)));
 452                 break;
 453
 454         case CM_MOVE:
 455         case CM_DRAW:
 456                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 457                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 458                                 (treg | VC2_CTRL_ECDISP));
 459                 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
 460                 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
 461                 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
 462                 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
 463                 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
 464         }
 465 }
 466
 467 static int newport_switch(struct vc_data *vc)
 468 {
 469         static int logo_drawn = 0;
 470
 471         topscan = 0;
 472         npregs->cset.topscan = 0x3ff;
 473
 474         if (!logo_drawn) {
 475                 if (newport_show_logo()) {
 476                         logo_drawn = 1;
 477                         logo_active = 1;
 478                 }
 479         }
 480
 481         return 1;
 482 }
 483
 484 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
 485 {
 486         unsigned short treg;
 487
 488         if (blank == 0) {
 489                 /* unblank console */
 490                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 491                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 492                                 (treg | VC2_CTRL_EDISP));
 493         } else {
 494                 /* blank console */
 495                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 496                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 497                                 (treg & ~(VC2_CTRL_EDISP)));
 498         }
 499         return 1;
 500 }
 501
 502 static int newport_set_font(int unit, struct console_font *op)
 503 {
 504         int w = op->width;
 505         int h = op->height;
 506         int size = h * op->charcount;
 507         int i;
 508         unsigned char *new_data, *data = op->data, *p;
 509
 510         /* ladis: when I grow up, there will be a day... and more sizes will
 511          * be supported ;-) */
 512         if ((w != 8) || (h != 16)
 513             || (op->charcount != 256 && op->charcount != 512))
 514                 return -EINVAL;
 515
 516         if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
 517              GFP_USER))) return -ENOMEM;
 518
 519         new_data += FONT_EXTRA_WORDS * sizeof(int);
 520         FNTSIZE(new_data) = size;
 521         FNTCHARCNT(new_data) = op->charcount;
 522         REFCOUNT(new_data) = 0; /* usage counter */
 523
 524         p = new_data;
 525         for (i = 0; i < op->charcount; i++) {
 526                 memcpy(p, data, h);
 527                 data += 32;
 528                 p += h;
 529         }
 530
 531         /* check if font is already used by other console */
 532         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 533                 if (font_data[i] != FONT_DATA
 534                     && FNTSIZE(font_data[i]) == size
 535                     && !memcmp(font_data[i], new_data, size)) {
 536                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
 537                         /* current font is the same as the new one */
 538                         if (i == unit)
 539                                 return 0;
 540                         new_data = font_data[i];
 541                         break;
 542                 }
 543         }
 544         /* old font is user font */
 545         if (font_data[unit] != FONT_DATA) {
 546                 if (--REFCOUNT(font_data[unit]) == 0)
 547                         kfree(font_data[unit] -
 548                               FONT_EXTRA_WORDS * sizeof(int));
 549         }
 550         REFCOUNT(new_data)++;
 551         font_data[unit] = new_data;
 552
 553         return 0;
 554 }
 555
 556 static int newport_set_def_font(int unit, struct console_font *op)
 557 {
 558         if (font_data[unit] != FONT_DATA) {
 559                 if (--REFCOUNT(font_data[unit]) == 0)
 560                         kfree(font_data[unit] -
 561                               FONT_EXTRA_WORDS * sizeof(int));
 562                 font_data[unit] = FONT_DATA;
 563         }
 564
 565         return 0;
 566 }
 567
 568 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
 569 {
 570         return newport_set_def_font(vc->vc_num, op);
 571 }
 572
 573 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
 574 {
 575         return newport_set_font(vc->vc_num, font);
 576 }
 577
 578 static int newport_set_palette(struct vc_data *vc, unsigned char *table)
 579 {
 580         return -EINVAL;
 581 }
 582
 583 static int newport_scrolldelta(struct vc_data *vc, int lines)
 584 {
 585         /* there is (nearly) no off-screen memory, so we can't scroll back */
 586         return 0;
 587 }
 588
 589 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
 590                           int lines)
 591 {
 592         int count, x, y;
 593         unsigned short *s, *d;
 594         unsigned short chattr;
 595
 596         logo_active = 0;        /* it's time to disable the logo now.. */
 597
 598         if (t == 0 && b == vc->vc_rows) {
 599                 if (dir == SM_UP) {
 600                         topscan = (topscan + (lines << 4)) & 0x3ff;
 601                         newport_clear_lines(vc->vc_rows - lines,
 602                                             vc->vc_rows - 1,
 603                                             (vc->vc_color & 0xf0) >> 4);
 604                 } else {
 605                         topscan = (topscan + (-lines << 4)) & 0x3ff;
 606                         newport_clear_lines(0, lines - 1,
 607                                             (vc->vc_color & 0xf0) >> 4);
 608                 }
 609                 npregs->cset.topscan = (topscan - 1) & 0x3ff;
 610                 return 0;
 611         }
 612
 613         count = (b - t - lines) * vc->vc_cols;
 614         if (dir == SM_UP) {
 615                 x = 0;
 616                 y = t;
 617                 s = (unsigned short *) (vc->vc_origin +
 618                                         vc->vc_size_row * (t + lines));
 619                 d = (unsigned short *) (vc->vc_origin +
 620                                         vc->vc_size_row * t);
 621                 while (count--) {
 622                         chattr = scr_readw(s++);
 623                         if (chattr != scr_readw(d)) {
 624                                 newport_putc(vc, chattr, y, x);
 625                                 scr_writew(chattr, d);
 626                         }
 627                         d++;
 628                         if (++x == vc->vc_cols) {
 629                                 x = 0;
 630                                 y++;
 631                         }
 632                 }
 633                 d = (unsigned short *) (vc->vc_origin +
 634                                         vc->vc_size_row * (b - lines));
 635                 x = 0;
 636                 y = b - lines;
 637                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 638                         if (scr_readw(d) != vc->vc_video_erase_char) {
 639                                 newport_putc(vc, vc->vc_video_erase_char,
 640                                              y, x);
 641                                 scr_writew(vc->vc_video_erase_char, d);
 642                         }
 643                         d++;
 644                         if (++x == vc->vc_cols) {
 645                                 x = 0;
 646                                 y++;
 647                         }
 648                 }
 649         } else {
 650                 x = vc->vc_cols - 1;
 651                 y = b - 1;
 652                 s = (unsigned short *) (vc->vc_origin +
 653                                         vc->vc_size_row * (b - lines) - 2);
 654                 d = (unsigned short *) (vc->vc_origin +
 655                                         vc->vc_size_row * b - 2);
 656                 while (count--) {
 657                         chattr = scr_readw(s--);
 658                         if (chattr != scr_readw(d)) {
 659                                 newport_putc(vc, chattr, y, x);
 660                                 scr_writew(chattr, d);
 661                         }
 662                         d--;
 663                         if (x-- == 0) {
 664                                 x = vc->vc_cols - 1;
 665                                 y--;
 666                         }
 667                 }
 668                 d = (unsigned short *) (vc->vc_origin +
 669                                         vc->vc_size_row * t);
 670                 x = 0;
 671                 y = t;
 672                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 673                         if (scr_readw(d) != vc->vc_video_erase_char) {
 674                                 newport_putc(vc, vc->vc_video_erase_char,
 675                                              y, x);
 676                                 scr_writew(vc->vc_video_erase_char, d);
 677                         }
 678                         d++;
 679                         if (++x == vc->vc_cols) {
 680                                 x = 0;
 681                                 y++;
 682                         }
 683                 }
 684         }
 685         return 1;
 686 }
 687
 688 static void newport_bmove(struct vc_data *vc, int sy, int sx, int dy,
 689                           int dx, int h, int w)
 690 {
 691         short xs, ys, xe, ye, xoffs, yoffs, tmp;
 692
 693         xs = sx << 3;
 694         xe = ((sx + w) << 3) - 1;
 695         /*
 696          * as bmove is only used to move stuff around in the same line
 697          * (h == 1), we don't care about wrap arounds caused by topscan != 0
 698          */
 699         ys = ((sy << 4) + topscan) & 0x3ff;
 700         ye = (((sy + h) << 4) - 1 + topscan) & 0x3ff;
 701         xoffs = (dx - sx) << 3;
 702         yoffs = (dy - sy) << 4;
 703         if (xoffs > 0) {
 704                 /* move to the right, exchange starting points */
 705                 tmp = xe;
 706                 xe = xs;
 707                 xs = tmp;
 708         }
 709         newport_wait(npregs);
 710         npregs->set.drawmode0 = (NPORT_DMODE0_S2S | NPORT_DMODE0_BLOCK |
 711                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 712                                  | NPORT_DMODE0_STOPY);
 713         npregs->set.xystarti = (xs << 16) | ys;
 714         npregs->set.xyendi = (xe << 16) | ye;
 715         npregs->go.xymove = (xoffs << 16) | yoffs;
 716 }
 717
 718 static int newport_dummy(struct vc_data *c)
 719 {
 720         return 0;
 721 }
 722
 723 #define DUMMY (void *) newport_dummy
 724
 725 const struct consw newport_con = {
 726         .owner            = THIS_MODULE,
 727         .con_startup      = newport_startup,
 728         .con_init         = newport_init,
 729         .con_deinit       = newport_deinit,
 730         .con_clear        = newport_clear,
 731         .con_putc         = newport_putc,
 732         .con_putcs        = newport_putcs,
 733         .con_cursor       = newport_cursor,
 734         .con_scroll       = newport_scroll,
 735         .con_bmove        = newport_bmove,
 736         .con_switch       = newport_switch,
 737         .con_blank        = newport_blank,
 738         .con_font_set     = newport_font_set,
 739         .con_font_default = newport_font_default,
 740         .con_set_palette  = newport_set_palette,
 741         .con_scrolldelta  = newport_scrolldelta,
 742         .con_set_origin   = DUMMY,
 743         .con_save_screen  = DUMMY
 744 };
 745
 746 #ifdef MODULE
 747 static int __init newport_console_init(void)
 748 {
 749         if (!sgi_gfxaddr)
 750                 return 0;
 751
 752         if (!npregs)
 753                 npregs = (struct newport_regs *)/* ioremap cannot fail */
 754                         ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
 755
 756         return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 757 }
 758 module_init(newport_console_init);
 759
 760 static void __exit newport_console_exit(void)
 761 {
 762         give_up_console(&newport_con);
 763         iounmap((void *)npregs);
 764 }
 765 module_exit(newport_console_exit);
 766 #endif
 767
 768 MODULE_LICENSE("GPL");