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");
769