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