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[PKT_SCHED] RED: Fix overflow in calculation of queue average
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / console / newport_con.c
blob762c7a593141f76f26f3d5721fc793439540c0df
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/tty.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 <asm/uaccess.h>
26 #include <asm/system.h>
27 #include <asm/page.h>
28 #include <asm/pgtable.h>
29 #include <video/newport.h>
30
31 #include <linux/linux_logo.h>
32 #include <linux/font.h>
33
34
35 extern unsigned long sgi_gfxaddr;
36
37 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
38
39 /* borrowed from fbcon.c */
40 #define REFCOUNT(fd) (((int *)(fd))[-1])
41 #define FNTSIZE(fd) (((int *)(fd))[-2])
42 #define FNTCHARCNT(fd) (((int *)(fd))[-3])
43 #define FONT_EXTRA_WORDS 3
44
45 static unsigned char *font_data[MAX_NR_CONSOLES];
46
47 static struct newport_regs *npregs;
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
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 void 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 = logo->clut;
106 const unsigned char *data = logo->data;
107 unsigned long i;
108
109 for (i = 0; i < logo->clutsize; i++) {
110 newport_bfwait(npregs);
111 newport_cmap_setaddr(npregs, i + 0x20);
112 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
113 clut += 3;
114 }
115
116 newport_wait(npregs);
117 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
118 NPORT_DMODE0_CHOST);
119
120 npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
121 npregs->set.xyendi = ((newport_xsize - 1) << 16);
122 newport_wait(npregs);
123
124 for (i = 0; i < logo->width*logo->height; i++)
125 npregs->go.hostrw0 = *data++ << 24;
126 #endif /* CONFIG_LOGO_SGI_CLUT224 */
127 }
128
129 static inline void newport_clear_screen(int xstart, int ystart, int xend,
130 int yend, int ci)
131 {
132 if (logo_active)
133 return;
134
135 newport_wait(npregs);
136 npregs->set.wrmask = 0xffffffff;
137 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
138 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
139 | NPORT_DMODE0_STOPY);
140 npregs->set.colori = ci;
141 npregs->set.xystarti = (xstart << 16) | ystart;
142 npregs->go.xyendi = (xend << 16) | yend;
143 }
144
145 static inline void newport_clear_lines(int ystart, int yend, int ci)
146 {
147 ystart = ((ystart << 4) + topscan) & 0x3ff;
148 yend = ((yend << 4) + topscan + 15) & 0x3ff;
149 newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
150 }
151
152 void newport_reset(void)
153 {
154 unsigned short treg;
155 int i;
156
157 newport_wait(npregs);
158 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
159 newport_vc2_set(npregs, VC2_IREG_CONTROL,
160 (treg | VC2_CTRL_EVIDEO));
161
162 treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
163 newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
164 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
165 NPORT_DMODE_W2 | VC2_PROTOCOL);
166 for (i = 0; i < 128; i++) {
167 newport_bfwait(npregs);
168 if (i == 92 || i == 94)
169 npregs->set.dcbdata0.byshort.s1 = 0xff00;
170 else
171 npregs->set.dcbdata0.byshort.s1 = 0x0000;
172 }
173
174 newport_init_cmap();
175
176 /* turn off popup plane */
177 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
178 XM9_CRS_CONFIG | NPORT_DMODE_W1);
179 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
180 npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
181 XM9_CRS_CONFIG | NPORT_DMODE_W1);
182 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
183
184 topscan = 0;
185 npregs->cset.topscan = 0x3ff;
186 npregs->cset.xywin = (4096 << 16) | 4096;
187
188 /* Clear the screen. */
189 newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
190 }
191
192 /*
193 * calculate the actual screen size by reading
194 * the video timing out of the VC2
195 */
196 void newport_get_screensize(void)
197 {
198 int i, cols;
199 unsigned short ventry, treg;
200 unsigned short linetable[128]; /* should be enough */
201
202 ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
203 newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
204 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
205 NPORT_DMODE_W2 | VC2_PROTOCOL);
206 for (i = 0; i < 128; i++) {
207 newport_bfwait(npregs);
208 linetable[i] = npregs->set.dcbdata0.byshort.s1;
209 }
210
211 newport_xsize = newport_ysize = 0;
212 for (i = 0; linetable[i + 1] && (i < sizeof(linetable)); i += 2) {
213 cols = 0;
214 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
215 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
216 NPORT_DMODE_W2 | VC2_PROTOCOL);
217 do {
218 newport_bfwait(npregs);
219 treg = npregs->set.dcbdata0.byshort.s1;
220 if ((treg & 1) == 0)
221 cols += (treg >> 7) & 0xfe;
222 if ((treg & 0x80) == 0) {
223 newport_bfwait(npregs);
224 treg = npregs->set.dcbdata0.byshort.s1;
225 }
226 } while ((treg & 0x8000) == 0);
227 if (cols) {
228 if (cols > newport_xsize)
229 newport_xsize = cols;
230 newport_ysize += linetable[i + 1];
231 }
232 }
233 printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
234 }
235
236 static void newport_get_revisions(void)
237 {
238 unsigned int tmp;
239 unsigned int board_rev;
240 unsigned int rex3_rev;
241 unsigned int vc2_rev;
242 unsigned int cmap_rev;
243 unsigned int xmap9_rev;
244 unsigned int bt445_rev;
245 unsigned int bitplanes;
246
247 rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
248
249 npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
250 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
251 tmp = npregs->set.dcbdata0.bybytes.b3;
252 cmap_rev = tmp & 7;
253 board_rev = (tmp >> 4) & 7;
254 bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
255
256 npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
257 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
258 tmp = npregs->set.dcbdata0.bybytes.b3;
259 if ((tmp & 7) < cmap_rev)
260 cmap_rev = (tmp & 7);
261
262 vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
263
264 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
265 XM9_CRS_REVISION | NPORT_DMODE_W1);
266 xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
267
268 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
269 BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
270 npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
271 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
272 BT445_CSR_REVISION | NPORT_DMODE_W1);
273 bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
274
275 #define L(a) (char)('A'+(a))
276 printk
277 ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
278 board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
279 L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
280 #undef L
281
282 if (board_rev == 3) /* I don't know all affected revisions */
283 xcurs_correction = 21;
284 }
285
286 /* Can't be __init, take_over_console may call it later */
287 static const char *newport_startup(void)
288 {
289 int i;
290
291 if (!sgi_gfxaddr)
292 return NULL;
293 npregs = (struct newport_regs *) /* ioremap cannot fail */
294 ioremap(sgi_gfxaddr, sizeof(struct newport_regs));
295 npregs->cset.config = NPORT_CFG_GD0;
296
297 if (newport_wait(npregs))
298 goto out_unmap;
299
300 npregs->set.xstarti = TESTVAL;
301 if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
302 goto out_unmap;
303
304 for (i = 0; i < MAX_NR_CONSOLES; i++)
305 font_data[i] = FONT_DATA;
306
307 newport_reset();
308 newport_get_revisions();
309 newport_get_screensize();
310
311 return "SGI Newport";
312
313 out_unmap:
314 iounmap((void *)npregs);
315 return NULL;
316 }
317
318 static void newport_init(struct vc_data *vc, int init)
319 {
320 vc->vc_cols = newport_xsize / 8;
321 vc->vc_rows = newport_ysize / 16;
322 vc->vc_can_do_color = 1;
323 }
324
325 static void newport_deinit(struct vc_data *c)
326 {
327 int i;
328
329 /* free memory used by user font */
330 for (i = 0; i < MAX_NR_CONSOLES; i++)
331 newport_set_def_font(i, NULL);
332 }
333
334 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
335 int width)
336 {
337 int xend = ((sx + width) << 3) - 1;
338 int ystart = ((sy << 4) + topscan) & 0x3ff;
339 int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
340
341 if (logo_active)
342 return;
343
344 if (ystart < yend) {
345 newport_clear_screen(sx << 3, ystart, xend, yend,
346 (vc->vc_color & 0xf0) >> 4);
347 } else {
348 newport_clear_screen(sx << 3, ystart, xend, 1023,
349 (vc->vc_color & 0xf0) >> 4);
350 newport_clear_screen(sx << 3, 0, xend, yend,
351 (vc->vc_color & 0xf0) >> 4);
352 }
353 }
354
355 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
356 int xpos)
357 {
358 unsigned char *p;
359
360 p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
361 charattr = (charattr >> 8) & 0xff;
362 xpos <<= 3;
363 ypos <<= 4;
364
365 newport_render_background(xpos, ypos, xpos, ypos,
366 (charattr & 0xf0) >> 4);
367
368 /* Set the color and drawing mode. */
369 newport_wait(npregs);
370 npregs->set.colori = charattr & 0xf;
371 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
372 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
373 NPORT_DMODE0_L32);
374
375 /* Set coordinates for bitmap operation. */
376 npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
377 npregs->set.xyendi = ((xpos + 7) << 16);
378 newport_wait(npregs);
379
380 /* Go, baby, go... */
381 RENDER(npregs, p);
382 }
383
384 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
385 int count, int ypos, int xpos)
386 {
387 int i;
388 int charattr;
389 unsigned char *p;
390
391 charattr = (scr_readw(s) >> 8) & 0xff;
392
393 xpos <<= 3;
394 ypos <<= 4;
395
396 if (!logo_active)
397 /* Clear the area behing the string */
398 newport_render_background(xpos, ypos,
399 xpos + ((count - 1) << 3), ypos,
400 (charattr & 0xf0) >> 4);
401
402 newport_wait(npregs);
403
404 /* Set the color and drawing mode. */
405 npregs->set.colori = charattr & 0xf;
406 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
407 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
408 NPORT_DMODE0_L32);
409
410 for (i = 0; i < count; i++, xpos += 8) {
411 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
412
413 newport_wait(npregs);
414
415 /* Set coordinates for bitmap operation. */
416 npregs->set.xystarti =
417 (xpos << 16) | ((ypos + topscan) & 0x3ff);
418 npregs->set.xyendi = ((xpos + 7) << 16);
419
420 /* Go, baby, go... */
421 RENDER(npregs, p);
422 }
423 }
424
425 static void newport_cursor(struct vc_data *vc, int mode)
426 {
427 unsigned short treg;
428 int xcurs, ycurs;
429
430 switch (mode) {
431 case CM_ERASE:
432 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
433 newport_vc2_set(npregs, VC2_IREG_CONTROL,
434 (treg & ~(VC2_CTRL_ECDISP)));
435 break;
436
437 case CM_MOVE:
438 case CM_DRAW:
439 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
440 newport_vc2_set(npregs, VC2_IREG_CONTROL,
441 (treg | VC2_CTRL_ECDISP));
442 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
443 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
444 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
445 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
446 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
447 }
448 }
449
450 static int newport_switch(struct vc_data *vc)
451 {
452 static int logo_drawn = 0;
453
454 topscan = 0;
455 npregs->cset.topscan = 0x3ff;
456
457 if (!logo_drawn) {
458 newport_show_logo();
459 logo_drawn = 1;
460 logo_active = 1;
461 }
462
463 return 1;
464 }
465
466 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
467 {
468 unsigned short treg;
469
470 if (blank == 0) {
471 /* unblank console */
472 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
473 newport_vc2_set(npregs, VC2_IREG_CONTROL,
474 (treg | VC2_CTRL_EDISP));
475 } else {
476 /* blank console */
477 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
478 newport_vc2_set(npregs, VC2_IREG_CONTROL,
479 (treg & ~(VC2_CTRL_EDISP)));
480 }
481 return 1;
482 }
483
484 static int newport_set_font(int unit, struct console_font *op)
485 {
486 int w = op->width;
487 int h = op->height;
488 int size = h * op->charcount;
489 int i;
490 unsigned char *new_data, *data = op->data, *p;
491
492 /* ladis: when I grow up, there will be a day... and more sizes will
493 * be supported ;-) */
494 if ((w != 8) || (h != 16)
495 || (op->charcount != 256 && op->charcount != 512))
496 return -EINVAL;
497
498 if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
499 GFP_USER))) return -ENOMEM;
500
501 new_data += FONT_EXTRA_WORDS * sizeof(int);
502 FNTSIZE(new_data) = size;
503 FNTCHARCNT(new_data) = op->charcount;
504 REFCOUNT(new_data) = 0; /* usage counter */
505
506 p = new_data;
507 for (i = 0; i < op->charcount; i++) {
508 memcpy(p, data, h);
509 data += 32;
510 p += h;
511 }
512
513 /* check if font is already used by other console */
514 for (i = 0; i < MAX_NR_CONSOLES; i++) {
515 if (font_data[i] != FONT_DATA
516 && FNTSIZE(font_data[i]) == size
517 && !memcmp(font_data[i], new_data, size)) {
518 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
519 /* current font is the same as the new one */
520 if (i == unit)
521 return 0;
522 new_data = font_data[i];
523 break;
524 }
525 }
526 /* old font is user font */
527 if (font_data[unit] != FONT_DATA) {
528 if (--REFCOUNT(font_data[unit]) == 0)
529 kfree(font_data[unit] -
530 FONT_EXTRA_WORDS * sizeof(int));
531 }
532 REFCOUNT(new_data)++;
533 font_data[unit] = new_data;
534
535 return 0;
536 }
537
538 static int newport_set_def_font(int unit, struct console_font *op)
539 {
540 if (font_data[unit] != FONT_DATA) {
541 if (--REFCOUNT(font_data[unit]) == 0)
542 kfree(font_data[unit] -
543 FONT_EXTRA_WORDS * sizeof(int));
544 font_data[unit] = FONT_DATA;
545 }
546
547 return 0;
548 }
549
550 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
551 {
552 return newport_set_def_font(vc->vc_num, op);
553 }
554
555 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
556 {
557 return newport_set_font(vc->vc_num, font);
558 }
559
560 static int newport_set_palette(struct vc_data *vc, unsigned char *table)
561 {
562 return -EINVAL;
563 }
564
565 static int newport_scrolldelta(struct vc_data *vc, int lines)
566 {
567 /* there is (nearly) no off-screen memory, so we can't scroll back */
568 return 0;
569 }
570
571 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
572 int lines)
573 {
574 int count, x, y;
575 unsigned short *s, *d;
576 unsigned short chattr;
577
578 logo_active = 0; /* it's time to disable the logo now.. */
579
580 if (t == 0 && b == vc->vc_rows) {
581 if (dir == SM_UP) {
582 topscan = (topscan + (lines << 4)) & 0x3ff;
583 newport_clear_lines(vc->vc_rows - lines,
584 vc->vc_rows - 1,
585 (vc->vc_color & 0xf0) >> 4);
586 } else {
587 topscan = (topscan + (-lines << 4)) & 0x3ff;
588 newport_clear_lines(0, lines - 1,
589 (vc->vc_color & 0xf0) >> 4);
590 }
591 npregs->cset.topscan = (topscan - 1) & 0x3ff;
592 return 0;
593 }
594
595 count = (b - t - lines) * vc->vc_cols;
596 if (dir == SM_UP) {
597 x = 0;
598 y = t;
599 s = (unsigned short *) (vc->vc_origin +
600 vc->vc_size_row * (t + lines));
601 d = (unsigned short *) (vc->vc_origin +
602 vc->vc_size_row * t);
603 while (count--) {
604 chattr = scr_readw(s++);
605 if (chattr != scr_readw(d)) {
606 newport_putc(vc, chattr, y, x);
607 scr_writew(chattr, d);
608 }
609 d++;
610 if (++x == vc->vc_cols) {
611 x = 0;
612 y++;
613 }
614 }
615 d = (unsigned short *) (vc->vc_origin +
616 vc->vc_size_row * (b - lines));
617 x = 0;
618 y = b - lines;
619 for (count = 0; count < (lines * vc->vc_cols); count++) {
620 if (scr_readw(d) != vc->vc_video_erase_char) {
621 newport_putc(vc, vc->vc_video_erase_char,
622 y, x);
623 scr_writew(vc->vc_video_erase_char, d);
624 }
625 d++;
626 if (++x == vc->vc_cols) {
627 x = 0;
628 y++;
629 }
630 }
631 } else {
632 x = vc->vc_cols - 1;
633 y = b - 1;
634 s = (unsigned short *) (vc->vc_origin +
635 vc->vc_size_row * (b - lines) - 2);
636 d = (unsigned short *) (vc->vc_origin +
637 vc->vc_size_row * b - 2);
638 while (count--) {
639 chattr = scr_readw(s--);
640 if (chattr != scr_readw(d)) {
641 newport_putc(vc, chattr, y, x);
642 scr_writew(chattr, d);
643 }
644 d--;
645 if (x-- == 0) {
646 x = vc->vc_cols - 1;
647 y--;
648 }
649 }
650 d = (unsigned short *) (vc->vc_origin +
651 vc->vc_size_row * t);
652 x = 0;
653 y = t;
654 for (count = 0; count < (lines * vc->vc_cols); count++) {
655 if (scr_readw(d) != vc->vc_video_erase_char) {
656 newport_putc(vc, vc->vc_video_erase_char,
657 y, x);
658 scr_writew(vc->vc_video_erase_char, d);
659 }
660 d++;
661 if (++x == vc->vc_cols) {
662 x = 0;
663 y++;
664 }
665 }
666 }
667 return 1;
668 }
669
670 static void newport_bmove(struct vc_data *vc, int sy, int sx, int dy,
671 int dx, int h, int w)
672 {
673 short xs, ys, xe, ye, xoffs, yoffs, tmp;
674
675 xs = sx << 3;
676 xe = ((sx + w) << 3) - 1;
677 /*
678 * as bmove is only used to move stuff around in the same line
679 * (h == 1), we don't care about wrap arounds caused by topscan != 0
680 */
681 ys = ((sy << 4) + topscan) & 0x3ff;
682 ye = (((sy + h) << 4) - 1 + topscan) & 0x3ff;
683 xoffs = (dx - sx) << 3;
684 yoffs = (dy - sy) << 4;
685 if (xoffs > 0) {
686 /* move to the right, exchange starting points */
687 tmp = xe;
688 xe = xs;
689 xs = tmp;
690 }
691 newport_wait(npregs);
692 npregs->set.drawmode0 = (NPORT_DMODE0_S2S | NPORT_DMODE0_BLOCK |
693 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
694 | NPORT_DMODE0_STOPY);
695 npregs->set.xystarti = (xs << 16) | ys;
696 npregs->set.xyendi = (xe << 16) | ye;
697 npregs->go.xymove = (xoffs << 16) | yoffs;
698 }
699
700 static int newport_dummy(struct vc_data *c)
701 {
702 return 0;
703 }
704
705 #define DUMMY (void *) newport_dummy
706
707 const struct consw newport_con = {
708 .owner = THIS_MODULE,
709 .con_startup = newport_startup,
710 .con_init = newport_init,
711 .con_deinit = newport_deinit,
712 .con_clear = newport_clear,
713 .con_putc = newport_putc,
714 .con_putcs = newport_putcs,
715 .con_cursor = newport_cursor,
716 .con_scroll = newport_scroll,
717 .con_bmove = newport_bmove,
718 .con_switch = newport_switch,
719 .con_blank = newport_blank,
720 .con_font_set = newport_font_set,
721 .con_font_default = newport_font_default,
722 .con_set_palette = newport_set_palette,
723 .con_scrolldelta = newport_scrolldelta,
724 .con_set_origin = DUMMY,
725 .con_save_screen = DUMMY
726 };
727
728 #ifdef MODULE
729 static int __init newport_console_init(void)
730 {
731 return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
732 }
733
734 static void __exit newport_console_exit(void)
735 {
736 give_up_console(&newport_con);
737 iounmap((void *)npregs);
738 }
739
740 module_init(newport_console_init);
741 module_exit(newport_console_exit);
742 #endif
743
744 MODULE_LICENSE("GPL");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree