drivers/video/console/newport_con.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * newport_con.c: Abscon for newport hardware
   4  *
   5  * (C) 1998 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
   6  * (C) 1999 Ulf Carlsson (ulfc@thepuffingruop.com)
   7  *
   8  * This driver is based on sgicons.c and cons_newport.
   9  *
  10  * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
  11  * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
  12  */
  13 #include <linux/init.h>
  14 #include <linux/kernel.h>
  15 #include <linux/errno.h>
  16 #include <linux/kd.h>
  17 #include <linux/selection.h>
  18 #include <linux/console.h>
  19 #include <linux/vt_kern.h>
  20 #include <linux/mm.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23
  24 #include <asm/io.h>
  25 #include <linux/uaccess.h>
  26 #include <asm/page.h>
  27 #include <asm/pgtable.h>
  28 #include <asm/gio_device.h>
  29
  30 #include <video/newport.h>
  31
  32 #include <linux/linux_logo.h>
  33 #include <linux/font.h>
  34
  35 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
  36
  37 /* borrowed from fbcon.c */
  38 #define REFCOUNT(fd)    (((int *)(fd))[-1])
  39 #define FNTSIZE(fd)     (((int *)(fd))[-2])
  40 #define FNTCHARCNT(fd)  (((int *)(fd))[-3])
  41 #define FONT_EXTRA_WORDS 3
  42
  43 static unsigned char *font_data[MAX_NR_CONSOLES];
  44
  45 static struct newport_regs *npregs;
  46
  47 static int logo_active;
  48 static int topscan;
  49 static int xcurs_correction = 29;
  50 static int newport_xsize;
  51 static int newport_ysize;
  52 static int newport_has_init;
  53
  54 static int newport_set_def_font(int unit, struct console_font *op);
  55
  56 #define BMASK(c) (c << 24)
  57
  58 #define RENDER(regs, cp) do { \
  59 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
  60 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
  61 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
  62 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
  63 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
  64 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
  65 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
  66 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
  67 } while(0)
  68
  69 #define TESTVAL 0xdeadbeef
  70 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
  71
  72 static inline void newport_render_background(int xstart, int ystart,
  73                                              int xend, int yend, int ci)
  74 {
  75         newport_wait(npregs);
  76         npregs->set.wrmask = 0xffffffff;
  77         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
  78                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
  79                                  | NPORT_DMODE0_STOPY);
  80         npregs->set.colori = ci;
  81         npregs->set.xystarti =
  82             (xstart << 16) | ((ystart + topscan) & 0x3ff);
  83         npregs->go.xyendi =
  84             ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
  85 }
  86
  87 static inline void newport_init_cmap(void)
  88 {
  89         unsigned short i;
  90
  91         for (i = 0; i < 16; i++) {
  92                 newport_bfwait(npregs);
  93                 newport_cmap_setaddr(npregs, color_table[i]);
  94                 newport_cmap_setrgb(npregs,
  95                                     default_red[i],
  96                                     default_grn[i], default_blu[i]);
  97         }
  98 }
  99
 100 static const struct linux_logo *newport_show_logo(void)
 101 {
 102 #ifdef CONFIG_LOGO_SGI_CLUT224
 103         const struct linux_logo *logo = fb_find_logo(8);
 104         const unsigned char *clut;
 105         const unsigned char *data;
 106         unsigned long i;
 107
 108         if (!logo)
 109                 return NULL;
 110         clut = logo->clut;
 111         data = logo->data;
 112
 113         for (i = 0; i < logo->clutsize; i++) {
 114                 newport_bfwait(npregs);
 115                 newport_cmap_setaddr(npregs, i + 0x20);
 116                 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
 117                 clut += 3;
 118         }
 119
 120         newport_wait(npregs);
 121         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 122                                  NPORT_DMODE0_CHOST);
 123
 124         npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
 125         npregs->set.xyendi = ((newport_xsize - 1) << 16);
 126         newport_wait(npregs);
 127
 128         for (i = 0; i < logo->width*logo->height; i++)
 129                 npregs->go.hostrw0 = *data++ << 24;
 130
 131         return logo;
 132 #endif /* CONFIG_LOGO_SGI_CLUT224 */
 133 }
 134
 135 static inline void newport_clear_screen(int xstart, int ystart, int xend,
 136                                         int yend, int ci)
 137 {
 138         if (logo_active)
 139                 return;
 140
 141         newport_wait(npregs);
 142         npregs->set.wrmask = 0xffffffff;
 143         npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
 144                                  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
 145                                  | NPORT_DMODE0_STOPY);
 146         npregs->set.colori = ci;
 147         npregs->set.xystarti = (xstart << 16) | ystart;
 148         npregs->go.xyendi = (xend << 16) | yend;
 149 }
 150
 151 static inline void newport_clear_lines(int ystart, int yend, int ci)
 152 {
 153         ystart = ((ystart << 4) + topscan) & 0x3ff;
 154         yend = ((yend << 4) + topscan + 15) & 0x3ff;
 155         newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
 156 }
 157
 158 static void newport_reset(void)
 159 {
 160         unsigned short treg;
 161         int i;
 162
 163         newport_wait(npregs);
 164         treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
 165         newport_vc2_set(npregs, VC2_IREG_CONTROL,
 166                         (treg | VC2_CTRL_EVIDEO));
 167
 168         treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
 169         newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
 170         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 171                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 172         for (i = 0; i < 128; i++) {
 173                 newport_bfwait(npregs);
 174                 if (i == 92 || i == 94)
 175                         npregs->set.dcbdata0.byshort.s1 = 0xff00;
 176                 else
 177                         npregs->set.dcbdata0.byshort.s1 = 0x0000;
 178         }
 179
 180         newport_init_cmap();
 181
 182         /* turn off popup plane */
 183         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 184                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 185         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 186         npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
 187                                XM9_CRS_CONFIG | NPORT_DMODE_W1);
 188         npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
 189
 190         topscan = 0;
 191         npregs->cset.topscan = 0x3ff;
 192         npregs->cset.xywin = (4096 << 16) | 4096;
 193
 194         /* Clear the screen. */
 195         newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
 196 }
 197
 198 /*
 199  * calculate the actual screen size by reading
 200  * the video timing out of the VC2
 201  */
 202 static void newport_get_screensize(void)
 203 {
 204         int i, cols;
 205         unsigned short ventry, treg;
 206         unsigned short linetable[128];  /* should be enough */
 207
 208         ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
 209         newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
 210         npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 211                                NPORT_DMODE_W2 | VC2_PROTOCOL);
 212         for (i = 0; i < 128; i++) {
 213                 newport_bfwait(npregs);
 214                 linetable[i] = npregs->set.dcbdata0.byshort.s1;
 215         }
 216
 217         newport_xsize = newport_ysize = 0;
 218         for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
 219                 cols = 0;
 220                 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
 221                 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
 222                                        NPORT_DMODE_W2 | VC2_PROTOCOL);
 223                 do {
 224                         newport_bfwait(npregs);
 225                         treg = npregs->set.dcbdata0.byshort.s1;
 226                         if ((treg & 1) == 0)
 227                                 cols += (treg >> 7) & 0xfe;
 228                         if ((treg & 0x80) == 0) {
 229                                 newport_bfwait(npregs);
 230                                 treg = npregs->set.dcbdata0.byshort.s1;
 231                         }
 232                 } while ((treg & 0x8000) == 0);
 233                 if (cols) {
 234                         if (cols > newport_xsize)
 235                                 newport_xsize = cols;
 236                         newport_ysize += linetable[i + 1];
 237                 }
 238         }
 239         printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
 240 }
 241
 242 static void newport_get_revisions(void)
 243 {
 244         unsigned int tmp;
 245         unsigned int board_rev;
 246         unsigned int rex3_rev;
 247         unsigned int vc2_rev;
 248         unsigned int cmap_rev;
 249         unsigned int xmap9_rev;
 250         unsigned int bt445_rev;
 251         unsigned int bitplanes;
 252
 253         rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
 254
 255         npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
 256                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 257         tmp = npregs->set.dcbdata0.bybytes.b3;
 258         cmap_rev = tmp & 7;
 259         board_rev = (tmp >> 4) & 7;
 260         bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
 261
 262         npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
 263                                NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
 264         tmp = npregs->set.dcbdata0.bybytes.b3;
 265         if ((tmp & 7) < cmap_rev)
 266                 cmap_rev = (tmp & 7);
 267
 268         vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
 269
 270         npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
 271                                XM9_CRS_REVISION | NPORT_DMODE_W1);
 272         xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
 273
 274         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 275                                BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
 276         npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
 277         npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
 278                                BT445_CSR_REVISION | NPORT_DMODE_W1);
 279         bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
 280
 281 #define L(a)     (char)('A'+(a))
 282         printk
 283             ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
 284              board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
 285              L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
 286 #undef L
 287
 288         if (board_rev == 3)     /* I don't know all affected revisions */
 289                 xcurs_correction = 21;
 290 }
 291
 292 static void newport_exit(void)
 293 {
 294         int i;
 295
 296         /* free memory used by user font */
 297         for (i = 0; i < MAX_NR_CONSOLES; i++)
 298                 newport_set_def_font(i, NULL);
 299 }
 300
 301 /* Can't be __init, do_take_over_console may call it later */
 302 static const char *newport_startup(void)
 303 {
 304         int i;
 305
 306         npregs->cset.config = NPORT_CFG_GD0;
 307
 308         if (newport_wait(npregs))
 309                 goto out_unmap;
 310
 311         npregs->set.xstarti = TESTVAL;
 312         if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
 313                 goto out_unmap;
 314
 315         for (i = 0; i < MAX_NR_CONSOLES; i++)
 316                 font_data[i] = FONT_DATA;
 317
 318         newport_reset();
 319         newport_get_revisions();
 320         newport_get_screensize();
 321         newport_has_init = 1;
 322
 323         return "SGI Newport";
 324
 325 out_unmap:
 326         return NULL;
 327 }
 328
 329 static void newport_init(struct vc_data *vc, int init)
 330 {
 331         int cols, rows;
 332
 333         cols = newport_xsize / 8;
 334         rows = newport_ysize / 16;
 335         vc->vc_can_do_color = 1;
 336         if (init) {
 337                 vc->vc_cols = cols;
 338                 vc->vc_rows = rows;
 339         } else
 340                 vc_resize(vc, cols, rows);
 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 bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
 579                 enum con_scroll dir, unsigned int lines)
 580 {
 581         int count, x, y;
 582         unsigned short *s, *d;
 583         unsigned short chattr;
 584
 585         logo_active = 0;        /* it's time to disable the logo now.. */
 586
 587         if (t == 0 && b == vc->vc_rows) {
 588                 if (dir == SM_UP) {
 589                         topscan = (topscan + (lines << 4)) & 0x3ff;
 590                         newport_clear_lines(vc->vc_rows - lines,
 591                                             vc->vc_rows - 1,
 592                                             (vc->vc_color & 0xf0) >> 4);
 593                 } else {
 594                         topscan = (topscan + (-lines << 4)) & 0x3ff;
 595                         newport_clear_lines(0, lines - 1,
 596                                             (vc->vc_color & 0xf0) >> 4);
 597                 }
 598                 npregs->cset.topscan = (topscan - 1) & 0x3ff;
 599                 return false;
 600         }
 601
 602         count = (b - t - lines) * vc->vc_cols;
 603         if (dir == SM_UP) {
 604                 x = 0;
 605                 y = t;
 606                 s = (unsigned short *) (vc->vc_origin +
 607                                         vc->vc_size_row * (t + lines));
 608                 d = (unsigned short *) (vc->vc_origin +
 609                                         vc->vc_size_row * t);
 610                 while (count--) {
 611                         chattr = scr_readw(s++);
 612                         if (chattr != scr_readw(d)) {
 613                                 newport_putc(vc, chattr, y, x);
 614                                 scr_writew(chattr, d);
 615                         }
 616                         d++;
 617                         if (++x == vc->vc_cols) {
 618                                 x = 0;
 619                                 y++;
 620                         }
 621                 }
 622                 d = (unsigned short *) (vc->vc_origin +
 623                                         vc->vc_size_row * (b - lines));
 624                 x = 0;
 625                 y = b - lines;
 626                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 627                         if (scr_readw(d) != vc->vc_video_erase_char) {
 628                                 newport_putc(vc, vc->vc_video_erase_char,
 629                                              y, x);
 630                                 scr_writew(vc->vc_video_erase_char, d);
 631                         }
 632                         d++;
 633                         if (++x == vc->vc_cols) {
 634                                 x = 0;
 635                                 y++;
 636                         }
 637                 }
 638         } else {
 639                 x = vc->vc_cols - 1;
 640                 y = b - 1;
 641                 s = (unsigned short *) (vc->vc_origin +
 642                                         vc->vc_size_row * (b - lines) - 2);
 643                 d = (unsigned short *) (vc->vc_origin +
 644                                         vc->vc_size_row * b - 2);
 645                 while (count--) {
 646                         chattr = scr_readw(s--);
 647                         if (chattr != scr_readw(d)) {
 648                                 newport_putc(vc, chattr, y, x);
 649                                 scr_writew(chattr, d);
 650                         }
 651                         d--;
 652                         if (x-- == 0) {
 653                                 x = vc->vc_cols - 1;
 654                                 y--;
 655                         }
 656                 }
 657                 d = (unsigned short *) (vc->vc_origin +
 658                                         vc->vc_size_row * t);
 659                 x = 0;
 660                 y = t;
 661                 for (count = 0; count < (lines * vc->vc_cols); count++) {
 662                         if (scr_readw(d) != vc->vc_video_erase_char) {
 663                                 newport_putc(vc, vc->vc_video_erase_char,
 664                                              y, x);
 665                                 scr_writew(vc->vc_video_erase_char, d);
 666                         }
 667                         d++;
 668                         if (++x == vc->vc_cols) {
 669                                 x = 0;
 670                                 y++;
 671                         }
 672                 }
 673         }
 674         return true;
 675 }
 676
 677 static int newport_set_origin(struct vc_data *vc)
 678 {
 679         return 0;
 680 }
 681
 682 static void newport_save_screen(struct vc_data *vc) { }
 683
 684 const struct consw newport_con = {
 685         .owner            = THIS_MODULE,
 686         .con_startup      = newport_startup,
 687         .con_init         = newport_init,
 688         .con_deinit       = newport_deinit,
 689         .con_clear        = newport_clear,
 690         .con_putc         = newport_putc,
 691         .con_putcs        = newport_putcs,
 692         .con_cursor       = newport_cursor,
 693         .con_scroll       = newport_scroll,
 694         .con_switch       = newport_switch,
 695         .con_blank        = newport_blank,
 696         .con_font_set     = newport_font_set,
 697         .con_font_default = newport_font_default,
 698         .con_set_origin   = newport_set_origin,
 699         .con_save_screen  = newport_save_screen
 700 };
 701
 702 static int newport_probe(struct gio_device *dev,
 703                          const struct gio_device_id *id)
 704 {
 705         unsigned long newport_addr;
 706         int err;
 707
 708         if (!dev->resource.start)
 709                 return -EINVAL;
 710
 711         if (npregs)
 712                 return -EBUSY; /* we only support one Newport as console */
 713
 714         newport_addr = dev->resource.start + 0xF0000;
 715         if (!request_mem_region(newport_addr, 0x10000, "Newport"))
 716                 return -ENODEV;
 717
 718         npregs = (struct newport_regs *)/* ioremap cannot fail */
 719                 ioremap(newport_addr, sizeof(struct newport_regs));
 720         console_lock();
 721         err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
 722         console_unlock();
 723         return err;
 724 }
 725
 726 static void newport_remove(struct gio_device *dev)
 727 {
 728         give_up_console(&newport_con);
 729         iounmap((void *)npregs);
 730 }
 731
 732 static struct gio_device_id newport_ids[] = {
 733         { .id = 0x7e },
 734         { .id = 0xff }
 735 };
 736
 737 MODULE_ALIAS("gio:7e");
 738
 739 static struct gio_driver newport_driver = {
 740         .name = "newport",
 741         .id_table = newport_ids,
 742         .probe = newport_probe,
 743         .remove = newport_remove,
 744 };
 745
 746 int __init newport_console_init(void)
 747 {
 748         return gio_register_driver(&newport_driver);
 749 }
 750
 751 void __exit newport_console_exit(void)
 752 {
 753         gio_unregister_driver(&newport_driver);
 754 }
 755
 756 module_init(newport_console_init);
 757 module_exit(newport_console_exit);
 758
 759 MODULE_LICENSE("GPL");