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[linux-2.6.git] / 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; linetable[i + 1] && (i < sizeof(linetable)); 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");