kernel/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 FONT_DATA ((unsigned char *)font_vga_8x16.data)
  35
  36 /* borrowed from fbcon.c */
  37 #define REFCOUNT(fd)    (((int *)(fd))[-1])
  38 #define FNTSIZE(fd)     (((int *)(fd))[-2])
  39 #define FNTCHARCNT(fd)  (((int *)(fd))[-3])
  40 #define FONT_EXTRA_WORDS 3
  41
  42 static unsigned char *font_data[MAX_NR_CONSOLES];
  43
  44 static struct newport_regs *npregs;
  45
  46 static int logo_active;
  47 static int topscan;
  48 static int xcurs_correction = 29;
  49 static int newport_xsize;
  50 static int newport_ysize;
  51 static int newport_has_init;
  52
  53 static int newport_set_def_font(int unit, struct console_font *op);
  54
  55 #define BMASK(c) (c << 24)
  56
  57 #define RENDER(regs, cp) do { \
  58 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
  59 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
  60 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
  61 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
  62 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
  63 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
  64 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
  65 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
  66 } while(0)
  67
  68 #define TESTVAL 0xdeadbeef
  69 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
  70
  71 static inline void newport_render_background(int xstart, int ystart,
  72                                              int xend, int yend, int ci)
  73 {
  74         newport_wait(npregs);
  75         npregs->set.wrmask = 0xffffffff;
  76         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
  77                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
  78                                  | NPORT_DMODE0_STOPY);
  79         npregs->set.colori = ci;
  80         npregs->set.xystarti =
  81             (xstart << 16) | ((ystart + topscan) & 0x3ff);
  82         npregs->go.xyendi =
  83             ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
  84 }
  85
  86 static inline void newport_init_cmap(void)
  87 {
  88         unsigned short i;
  89
  90         for (i = 0; i < 16; i++) {
  91                 newport_bfwait(npregs);
  92                 newport_cmap_setaddr(npregs, color_table[i]);
  93                 newport_cmap_setrgb(npregs,
  94                                     default_red[i],
  95                                     default_grn[i], default_blu[i]);
  96         }
  97 }
  98
  99 static const struct linux_logo *newport_show_logo(void)
 100 {
 101 #ifdef CONFIG_LOGO_SGI_CLUT224
 102         const struct linux_logo *logo = fb_find_logo(8);
 103         const unsigned char *clut;
 104         const unsigned char *data;
 105         unsigned long i;
 106
 107         if (!logo)
 108                 return NULL;
 109         clut = logo->clut;
 110         data = logo->data;
 111
 112         for (i = 0; i < logo->clutsize; i++) {
 113                 newport_bfwait(npregs);
 114                 newport_cmap_setaddr(npregs, i + 0x20);
 115                 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
 116                 clut += 3;
 117         }
 118
 119         newport_wait(npregs);
 120         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 121                                  NPORT_DMODE0_CHOST);
 122
 123         npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
 124         npregs->set.xyendi = ((newport_xsize - 1) << 16);
 125         newport_wait(npregs);
 126
 127         for (i = 0; i < logo->width*logo->height; i++)
 128                 npregs->go.hostrw0 = *data++ << 24;
 129
 130         return logo;
 131 #endif /* CONFIG_LOGO_SGI_CLUT224 */
 132 }
 133
 134 static inline void newport_clear_screen(int xstart, int ystart, int xend,
 135                                         int yend, int ci)
 136 {
 137         if (logo_active)
 138                 return;
 139
 140         newport_wait(npregs);
 141         npregs->set.wrmask = 0xffffffff;
 142         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 143                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 144                                  | NPORT_DMODE0_STOPY);
 145         npregs->set.colori = ci;
 146         npregs->set.xystarti = (xstart << 16) | ystart;
 147         npregs->go.xyendi = (xend << 16) | yend;
 148 }
 149
 150 static inline void newport_clear_lines(int ystart, int yend, int ci)
 151 {
 152         ystart = ((ystart << 4) + topscan) & 0x3ff;
 153         yend = ((yend << 4) + topscan + 15) & 0x3ff;
 154         newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
 155 }
 156
 157 static void newport_reset(void)
 158 {
 159         unsigned short treg;
 160         int i;
 161
 162         newport_wait(npregs);
 163         treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 164         newport_vc2_set(npregs, VC2_IREG_CONTROL,
 165                         (treg | VC2_CTRL_EVIDEO));
 166
 167         treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
 168         newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
 169         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 170                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 171         for (i = 0; i < 128; i++) {
 172                 newport_bfwait(npregs);
 173                 if (i == 92 || i == 94)
 174                         npregs->set.dcbdata0.byshort.s1 = 0xff00;
 175                 else
 176                         npregs->set.dcbdata0.byshort.s1 = 0x0000;
 177         }
 178
 179         newport_init_cmap();
 180
 181         /* turn off popup plane */
 182         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 183                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 184         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 185         npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
 186                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 187         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 188
 189         topscan = 0;
 190         npregs->cset.topscan = 0x3ff;
 191         npregs->cset.xywin = (4096 << 16) | 4096;
 192
 193         /* Clear the screen. */
 194         newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
 195 }
 196
 197 /*
 198  * calculate the actual screen size by reading
 199  * the video timing out of the VC2
 200  */
 201 static void newport_get_screensize(void)
 202 {
 203         int i, cols;
 204         unsigned short ventry, treg;
 205         unsigned short linetable[128];  /* should be enough */
 206
 207         ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
 208         newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
 209         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 210                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 211         for (i = 0; i < 128; i++) {
 212                 newport_bfwait(npregs);
 213                 linetable[i] = npregs->set.dcbdata0.byshort.s1;
 214         }
 215
 216         newport_xsize = newport_ysize = 0;
 217         for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
 218                 cols = 0;
 219                 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 220                 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 221                                        NPORT_DMODE_W2 | VC2_PROTOCOL);
 222                 do {
 223                         newport_bfwait(npregs);
 224                         treg = npregs->set.dcbdata0.byshort.s1;
 225                         if ((treg & 1) == 0)
 226                                 cols += (treg >> 7) & 0xfe;
 227                         if ((treg & 0x80) == 0) {
 228                                 newport_bfwait(npregs);
 229                                 treg = npregs->set.dcbdata0.byshort.s1;
 230                         }
 231                 } while ((treg & 0x8000) == 0);
 232                 if (cols) {
 233                         if (cols > newport_xsize)
 234                                 newport_xsize = cols;
 235                         newport_ysize += linetable[i + 1];
 236                 }
 237         }
 238         printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
 239 }
 240
 241 static void newport_get_revisions(void)
 242 {
 243         unsigned int tmp;
 244         unsigned int board_rev;
 245         unsigned int rex3_rev;
 246         unsigned int vc2_rev;
 247         unsigned int cmap_rev;
 248         unsigned int xmap9_rev;
 249         unsigned int bt445_rev;
 250         unsigned int bitplanes;
 251
 252         rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
 253
 254         npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
 255                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 256         tmp = npregs->set.dcbdata0.bybytes.b3;
 257         cmap_rev = tmp & 7;
 258         board_rev = (tmp >> 4) & 7;
 259         bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
 260
 261         npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
 262                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 263         tmp = npregs->set.dcbdata0.bybytes.b3;
 264         if ((tmp & 7) < cmap_rev)
 265                 cmap_rev = (tmp & 7);
 266
 267         vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
 268
 269         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 270                                XM9_CRS_REVISION | NPORT_DMODE_W1);
 271         xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
 272
 273         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 274                                BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
 275         npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
 276         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 277                                BT445_CSR_REVISION | NPORT_DMODE_W1);
 278         bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
 279
 280 #define L(a)     (char)('A'+(a))
 281         printk
 282             ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
 283              board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
 284              L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
 285 #undef L
 286
 287         if (board_rev == 3)     /* I don't know all affected revisions */
 288                 xcurs_correction = 21;
 289 }
 290
 291 static void newport_exit(void)
 292 {
 293         int i;
 294
 295         /* free memory used by user font */
 296         for (i = 0; i < MAX_NR_CONSOLES; i++)
 297                 newport_set_def_font(i, NULL);
 298 }
 299
 300 /* Can't be __init, do_take_over_console may call it later */
 301 static const char *newport_startup(void)
 302 {
 303         int i;
 304
 305         npregs->cset.config = NPORT_CFG_GD0;
 306
 307         if (newport_wait(npregs))
 308                 goto out_unmap;
 309
 310         npregs->set.xstarti = TESTVAL;
 311         if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
 312                 goto out_unmap;
 313
 314         for (i = 0; i < MAX_NR_CONSOLES; i++)
 315                 font_data[i] = FONT_DATA;
 316
 317         newport_reset();
 318         newport_get_revisions();
 319         newport_get_screensize();
 320         newport_has_init = 1;
 321
 322         return "SGI Newport";
 323
 324 out_unmap:
 325         return NULL;
 326 }
 327
 328 static void newport_init(struct vc_data *vc, int init)
 329 {
 330         int cols, rows;
 331
 332         cols = newport_xsize / 8;
 333         rows = newport_ysize / 16;
 334         vc->vc_can_do_color = 1;
 335         if (init) {
 336                 vc->vc_cols = cols;
 337                 vc->vc_rows = rows;
 338         } else
 339                 vc_resize(vc, cols, rows);
 340 }
 341
 342 static void newport_deinit(struct vc_data *c)
 343 {
 344         if (!con_is_bound(&newport_con) && newport_has_init) {
 345                 newport_exit();
 346                 newport_has_init = 0;
 347         }
 348 }
 349
 350 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
 351                           int width)
 352 {
 353         int xend = ((sx + width) << 3) - 1;
 354         int ystart = ((sy << 4) + topscan) & 0x3ff;
 355         int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
 356
 357         if (logo_active)
 358                 return;
 359
 360         if (ystart < yend) {
 361                 newport_clear_screen(sx << 3, ystart, xend, yend,
 362                                      (vc->vc_color & 0xf0) >> 4);
 363         } else {
 364                 newport_clear_screen(sx << 3, ystart, xend, 1023,
 365                                      (vc->vc_color & 0xf0) >> 4);
 366                 newport_clear_screen(sx << 3, 0, xend, yend,
 367                                      (vc->vc_color & 0xf0) >> 4);
 368         }
 369 }
 370
 371 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
 372                          int xpos)
 373 {
 374         unsigned char *p;
 375
 376         p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
 377         charattr = (charattr >> 8) & 0xff;
 378         xpos <<= 3;
 379         ypos <<= 4;
 380
 381         newport_render_background(xpos, ypos, xpos, ypos,
 382                                   (charattr & 0xf0) >> 4);
 383
 384         /* Set the color and drawing mode. */
 385         newport_wait(npregs);
 386         npregs->set.colori = charattr & 0xf;
 387         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 388                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 389                                  NPORT_DMODE0_L32);
 390
 391         /* Set coordinates for bitmap operation. */
 392         npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
 393         npregs->set.xyendi = ((xpos + 7) << 16);
 394         newport_wait(npregs);
 395
 396         /* Go, baby, go... */
 397         RENDER(npregs, p);
 398 }
 399
 400 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
 401                           int count, int ypos, int xpos)
 402 {
 403         int i;
 404         int charattr;
 405         unsigned char *p;
 406
 407         charattr = (scr_readw(s) >> 8) & 0xff;
 408
 409         xpos <<= 3;
 410         ypos <<= 4;
 411
 412         if (!logo_active)
 413                 /* Clear the area behing the string */
 414                 newport_render_background(xpos, ypos,
 415                                           xpos + ((count - 1) << 3), ypos,
 416                                           (charattr & 0xf0) >> 4);
 417
 418         newport_wait(npregs);
 419
 420         /* Set the color and drawing mode. */
 421         npregs->set.colori = charattr & 0xf;
 422         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 423                                  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
 424                                  NPORT_DMODE0_L32);
 425
 426         for (i = 0; i < count; i++, xpos += 8) {
 427                 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
 428
 429                 newport_wait(npregs);
 430
 431                 /* Set coordinates for bitmap operation. */
 432                 npregs->set.xystarti =
 433                     (xpos << 16) | ((ypos + topscan) & 0x3ff);
 434                 npregs->set.xyendi = ((xpos + 7) << 16);
 435
 436                 /* Go, baby, go... */
 437                 RENDER(npregs, p);
 438         }
 439 }
 440
 441 static void newport_cursor(struct vc_data *vc, int mode)
 442 {
 443         unsigned short treg;
 444         int xcurs, ycurs;
 445
 446         switch (mode) {
 447         case CM_ERASE:
 448                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 449                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 450                                 (treg & ~(VC2_CTRL_ECDISP)));
 451                 break;
 452
 453         case CM_MOVE:
 454         case CM_DRAW:
 455                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 456                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 457                                 (treg | VC2_CTRL_ECDISP));
 458                 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
 459                 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
 460                 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
 461                 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
 462                 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
 463         }
 464 }
 465
 466 static int newport_switch(struct vc_data *vc)
 467 {
 468         static int logo_drawn = 0;
 469
 470         topscan = 0;
 471         npregs->cset.topscan = 0x3ff;
 472
 473         if (!logo_drawn) {
 474                 if (newport_show_logo()) {
 475                         logo_drawn = 1;
 476                         logo_active = 1;
 477                 }
 478         }
 479
 480         return 1;
 481 }
 482
 483 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
 484 {
 485         unsigned short treg;
 486
 487         if (blank == 0) {
 488                 /* unblank console */
 489                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 490                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 491                                 (treg | VC2_CTRL_EDISP));
 492         } else {
 493                 /* blank console */
 494                 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 495                 newport_vc2_set(npregs, VC2_IREG_CONTROL,
 496                                 (treg & ~(VC2_CTRL_EDISP)));
 497         }
 498         return 1;
 499 }
 500
 501 static int newport_set_font(int unit, struct console_font *op)
 502 {
 503         int w = op->width;
 504         int h = op->height;
 505         int size = h * op->charcount;
 506         int i;
 507         unsigned char *new_data, *data = op->data, *p;
 508
 509         /* ladis: when I grow up, there will be a day... and more sizes will
 510          * be supported ;-) */
 511         if ((w != 8) || (h != 16)
 512             || (op->charcount != 256 && op->charcount != 512))
 513                 return -EINVAL;
 514
 515         if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
 516              GFP_USER))) return -ENOMEM;
 517
 518         new_data += FONT_EXTRA_WORDS * sizeof(int);
 519         FNTSIZE(new_data) = size;
 520         FNTCHARCNT(new_data) = op->charcount;
 521         REFCOUNT(new_data) = 0; /* usage counter */
 522
 523         p = new_data;
 524         for (i = 0; i < op->charcount; i++) {
 525                 memcpy(p, data, h);
 526                 data += 32;
 527                 p += h;
 528         }
 529
 530         /* check if font is already used by other console */
 531         for (i = 0; i < MAX_NR_CONSOLES; i++) {
 532                 if (font_data[i] != FONT_DATA
 533                     && FNTSIZE(font_data[i]) == size
 534                     && !memcmp(font_data[i], new_data, size)) {
 535                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
 536                         /* current font is the same as the new one */
 537                         if (i == unit)
 538                                 return 0;
 539                         new_data = font_data[i];
 540                         break;
 541                 }
 542         }
 543         /* old font is user font */
 544         if (font_data[unit] != FONT_DATA) {
 545                 if (--REFCOUNT(font_data[unit]) == 0)
 546                         kfree(font_data[unit] -
 547                               FONT_EXTRA_WORDS * sizeof(int));
 548         }
 549         REFCOUNT(new_data)++;
 550         font_data[unit] = new_data;
 551
 552         return 0;
 553 }
 554
 555 static int newport_set_def_font(int unit, struct console_font *op)
 556 {
 557         if (font_data[unit] != FONT_DATA) {
 558                 if (--REFCOUNT(font_data[unit]) == 0)
 559                         kfree(font_data[unit] -
 560                               FONT_EXTRA_WORDS * sizeof(int));
 561                 font_data[unit] = FONT_DATA;
 562         }
 563
 564         return 0;
 565 }
 566
 567 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
 568 {
 569         return newport_set_def_font(vc->vc_num, op);
 570 }
 571
 572 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
 573 {
 574         return newport_set_font(vc->vc_num, font);
 575 }
 576
 577 static int newport_set_palette(struct vc_data *vc, unsigned char *table)
 578 {
 579         return -EINVAL;
 580 }
 581
 582 static int newport_scrolldelta(struct vc_data *vc, int lines)
 583 {
 584         /* there is (nearly) no off-screen memory, so we can't scroll back */
 585         return 0;
 586 }
 587
 588 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
 589                           int lines)
 590 {
 591         int count, x, y;
 592         unsigned short *s, *d;
 593         unsigned short chattr;
 594
 595         logo_active = 0;        /* it's time to disable the logo now.. */
 596
 597         if (t == 0 && b == vc->vc_rows) {
 598                 if (dir == SM_UP) {
 599                         topscan = (topscan + (lines << 4)) & 0x3ff;
 600                         newport_clear_lines(vc->vc_rows - lines,
 601                                             vc->vc_rows - 1,
 602                                             (vc->vc_color & 0xf0) >> 4);
 603                 } else {
 604                         topscan = (topscan + (-lines << 4)) & 0x3ff;
 605                         newport_clear_lines(0, lines - 1,
 606                                             (vc->vc_color & 0xf0) >> 4);
 607                 }
 608                 npregs->cset.topscan = (topscan - 1) & 0x3ff;
 609                 return 0;
 610         }
 611
 612         count = (b - t - lines) * vc->vc_cols;
 613         if (dir == SM_UP) {
 614                 x = 0;
 615                 y = t;
 616                 s = (unsigned short *) (vc->vc_origin +
 617                                         vc->vc_size_row * (t + lines));
 618                 d = (unsigned short *) (vc->vc_origin +
 619                                         vc->vc_size_row * t);
 620                 while (count--) {
 621                         chattr = scr_readw(s++);
 622                         if (chattr != scr_readw(d)) {
 623                                 newport_putc(vc, chattr, y, x);
 624                                 scr_writew(chattr, d);
 625                         }
 626                         d++;
 627                         if (++x == vc->vc_cols) {
 628                                 x = 0;
 629                                 y++;
 630                         }
 631                 }
 632                 d = (unsigned short *) (vc->vc_origin +
 633                                         vc->vc_size_row * (b - lines));
 634                 x = 0;
 635                 y = b - lines;
 636                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 637                         if (scr_readw(d) != vc->vc_video_erase_char) {
 638                                 newport_putc(vc, vc->vc_video_erase_char,
 639                                              y, x);
 640                                 scr_writew(vc->vc_video_erase_char, d);
 641                         }
 642                         d++;
 643                         if (++x == vc->vc_cols) {
 644                                 x = 0;
 645                                 y++;
 646                         }
 647                 }
 648         } else {
 649                 x = vc->vc_cols - 1;
 650                 y = b - 1;
 651                 s = (unsigned short *) (vc->vc_origin +
 652                                         vc->vc_size_row * (b - lines) - 2);
 653                 d = (unsigned short *) (vc->vc_origin +
 654                                         vc->vc_size_row * b - 2);
 655                 while (count--) {
 656                         chattr = scr_readw(s--);
 657                         if (chattr != scr_readw(d)) {
 658                                 newport_putc(vc, chattr, y, x);
 659                                 scr_writew(chattr, d);
 660                         }
 661                         d--;
 662                         if (x-- == 0) {
 663                                 x = vc->vc_cols - 1;
 664                                 y--;
 665                         }
 666                 }
 667                 d = (unsigned short *) (vc->vc_origin +
 668                                         vc->vc_size_row * t);
 669                 x = 0;
 670                 y = t;
 671                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 672                         if (scr_readw(d) != vc->vc_video_erase_char) {
 673                                 newport_putc(vc, vc->vc_video_erase_char,
 674                                              y, x);
 675                                 scr_writew(vc->vc_video_erase_char, d);
 676                         }
 677                         d++;
 678                         if (++x == vc->vc_cols) {
 679                                 x = 0;
 680                                 y++;
 681                         }
 682                 }
 683         }
 684         return 1;
 685 }
 686
 687 static void newport_bmove(struct vc_data *vc, int sy, int sx, int dy,
 688                           int dx, int h, int w)
 689 {
 690         short xs, ys, xe, ye, xoffs, yoffs, tmp;
 691
 692         xs = sx << 3;
 693         xe = ((sx + w) << 3) - 1;
 694         /*
 695          * as bmove is only used to move stuff around in the same line
 696          * (h == 1), we don't care about wrap arounds caused by topscan != 0
 697          */
 698         ys = ((sy << 4) + topscan) & 0x3ff;
 699         ye = (((sy + h) << 4) - 1 + topscan) & 0x3ff;
 700         xoffs = (dx - sx) << 3;
 701         yoffs = (dy - sy) << 4;
 702         if (xoffs > 0) {
 703                 /* move to the right, exchange starting points */
 704                 tmp = xe;
 705                 xe = xs;
 706                 xs = tmp;
 707         }
 708         newport_wait(npregs);
 709         npregs->set.drawmode0 = (NPORT_DMODE0_S2S | NPORT_DMODE0_BLOCK |
 710                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 711                                  | NPORT_DMODE0_STOPY);
 712         npregs->set.xystarti = (xs << 16) | ys;
 713         npregs->set.xyendi = (xe << 16) | ye;
 714         npregs->go.xymove = (xoffs << 16) | yoffs;
 715 }
 716
 717 static int newport_dummy(struct vc_data *c)
 718 {
 719         return 0;
 720 }
 721
 722 #define DUMMY (void *) newport_dummy
 723
 724 const struct consw newport_con = {
 725         .owner            = THIS_MODULE,
 726         .con_startup      = newport_startup,
 727         .con_init         = newport_init,
 728         .con_deinit       = newport_deinit,
 729         .con_clear        = newport_clear,
 730         .con_putc         = newport_putc,
 731         .con_putcs        = newport_putcs,
 732         .con_cursor       = newport_cursor,
 733         .con_scroll       = newport_scroll,
 734         .con_bmove        = newport_bmove,
 735         .con_switch       = newport_switch,
 736         .con_blank        = newport_blank,
 737         .con_font_set     = newport_font_set,
 738         .con_font_default = newport_font_default,
 739         .con_set_palette  = newport_set_palette,
 740         .con_scrolldelta  = newport_scrolldelta,
 741         .con_set_origin   = DUMMY,
 742         .con_save_screen  = DUMMY
 743 };
 744
 745 static int newport_probe(struct gio_device *dev,
 746                          const struct gio_device_id *id)
 747 {
 748         unsigned long newport_addr;
 749         int err;
 750
 751         if (!dev->resource.start)
 752                 return -EINVAL;
 753
 754         if (npregs)
 755                 return -EBUSY; /* we only support one Newport as console */
 756
 757         newport_addr = dev->resource.start + 0xF0000;
 758         if (!request_mem_region(newport_addr, 0x10000, "Newport"))
 759                 return -ENODEV;
 760
 761         npregs = (struct newport_regs *)/* ioremap cannot fail */
 762                 ioremap(newport_addr, sizeof(struct newport_regs));
 763         console_lock();
 764         err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 765         console_unlock();
 766         return err;
 767 }
 768
 769 static void newport_remove(struct gio_device *dev)
 770 {
 771         give_up_console(&newport_con);
 772         iounmap((void *)npregs);
 773 }
 774
 775 static struct gio_device_id newport_ids[] = {
 776         { .id = 0x7e },
 777         { .id = 0xff }
 778 };
 779
 780 MODULE_ALIAS("gio:7e");
 781
 782 static struct gio_driver newport_driver = {
 783         .name = "newport",
 784         .id_table = newport_ids,
 785         .probe = newport_probe,
 786         .remove = newport_remove,
 787 };
 788
 789 int __init newport_console_init(void)
 790 {
 791         return gio_register_driver(&newport_driver);
 792 }
 793
 794 void __exit newport_console_exit(void)
 795 {
 796         gio_unregister_driver(&newport_driver);
 797 }
 798
 799 module_init(newport_console_init);
 800 module_exit(newport_console_exit);
 801
 802 MODULE_LICENSE("GPL");