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newport_con.c
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1 /*
2  * newport_con.c: Abscon for newport hardware
3  *
4  * (C) 1998 Thomas Bogendoerfer ([email protected])
5  * (C) 1999 Ulf Carlsson ([email protected])
6  *
7  * This driver is based on sgicons.c and cons_newport.
8  *
9  * Copyright (C) 1996 David S. Miller ([email protected])
10  * Copyright (C) 1997 Miguel de Icaza ([email protected])
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/page.h>
26 #include <asm/pgtable.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 FONT_DATA ((unsigned char *)font_vga_8x16.data)
35 
36 /* borrowed from fbcon.c */
37 #define REFCOUNT(fd) (((int *)(fd))[-1])
38 #define FNTSIZE(fd) (((int *)(fd))[-2])
39 #define FNTCHARCNT(fd) (((int *)(fd))[-3])
40 #define FONT_EXTRA_WORDS 3
41 
42 static unsigned char *font_data[MAX_NR_CONSOLES];
43 
44 static struct newport_regs *npregs;
45 
46 static int logo_active;
47 static int topscan;
48 static int xcurs_correction = 29;
49 static int newport_xsize;
50 static int newport_ysize;
51 static int newport_has_init;
52 
53 static int newport_set_def_font(int unit, struct console_font *op);
54 
55 #define BMASK(c) (c << 24)
56 
57 #define RENDER(regs, cp) do { \
58 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
59 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
60 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
61 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
62 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
63 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
64 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
65 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
66 } while(0)
67 
68 #define TESTVAL 0xdeadbeef
69 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
70 
71 static inline void newport_render_background(int xstart, int ystart,
72  int xend, int yend, int ci)
73 {
74  newport_wait(npregs);
75  npregs->set.wrmask = 0xffffffff;
76  npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
77  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
78  | NPORT_DMODE0_STOPY);
79  npregs->set.colori = ci;
80  npregs->set.xystarti =
81  (xstart << 16) | ((ystart + topscan) & 0x3ff);
82  npregs->go.xyendi =
83  ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
84 }
85 
86 static inline void newport_init_cmap(void)
87 {
88  unsigned short i;
89 
90  for (i = 0; i < 16; i++) {
91  newport_bfwait(npregs);
92  newport_cmap_setaddr(npregs, color_table[i]);
93  newport_cmap_setrgb(npregs,
94  default_red[i],
95  default_grn[i], default_blu[i]);
96  }
97 }
98 
99 static const struct linux_logo *newport_show_logo(void)
100 {
101 #ifdef CONFIG_LOGO_SGI_CLUT224
102  const struct linux_logo *logo = fb_find_logo(8);
103  const unsigned char *clut;
104  const unsigned char *data;
105  unsigned long i;
106 
107  if (!logo)
108  return NULL;
109  clut = logo->clut;
110  data = logo->data;
111 
112  for (i = 0; i < logo->clutsize; i++) {
113  newport_bfwait(npregs);
114  newport_cmap_setaddr(npregs, i + 0x20);
115  newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
116  clut += 3;
117  }
118 
119  newport_wait(npregs);
120  npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
121  NPORT_DMODE0_CHOST);
122 
123  npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
124  npregs->set.xyendi = ((newport_xsize - 1) << 16);
125  newport_wait(npregs);
126 
127  for (i = 0; i < logo->width*logo->height; i++)
128  npregs->go.hostrw0 = *data++ << 24;
129 
130  return logo;
131 #endif /* CONFIG_LOGO_SGI_CLUT224 */
132 }
133 
134 static inline void newport_clear_screen(int xstart, int ystart, int xend,
135  int yend, int ci)
136 {
137  if (logo_active)
138  return;
139 
140  newport_wait(npregs);
141  npregs->set.wrmask = 0xffffffff;
142  npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
143  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
144  | NPORT_DMODE0_STOPY);
145  npregs->set.colori = ci;
146  npregs->set.xystarti = (xstart << 16) | ystart;
147  npregs->go.xyendi = (xend << 16) | yend;
148 }
149 
150 static inline void newport_clear_lines(int ystart, int yend, int ci)
151 {
152  ystart = ((ystart << 4) + topscan) & 0x3ff;
153  yend = ((yend << 4) + topscan + 15) & 0x3ff;
154  newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
155 }
156 
157 static void newport_reset(void)
158 {
159  unsigned short treg;
160  int i;
161 
162  newport_wait(npregs);
163  treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
164  newport_vc2_set(npregs, VC2_IREG_CONTROL,
165  (treg | VC2_CTRL_EVIDEO));
166 
167  treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
168  newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
169  npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
170  NPORT_DMODE_W2 | VC2_PROTOCOL);
171  for (i = 0; i < 128; i++) {
172  newport_bfwait(npregs);
173  if (i == 92 || i == 94)
174  npregs->set.dcbdata0.byshort.s1 = 0xff00;
175  else
176  npregs->set.dcbdata0.byshort.s1 = 0x0000;
177  }
178 
179  newport_init_cmap();
180 
181  /* turn off popup plane */
182  npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
183  XM9_CRS_CONFIG | NPORT_DMODE_W1);
184  npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
185  npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
186  XM9_CRS_CONFIG | NPORT_DMODE_W1);
187  npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
188 
189  topscan = 0;
190  npregs->cset.topscan = 0x3ff;
191  npregs->cset.xywin = (4096 << 16) | 4096;
192 
193  /* Clear the screen. */
194  newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
195 }
196 
197 /*
198  * calculate the actual screen size by reading
199  * the video timing out of the VC2
200  */
201 static void newport_get_screensize(void)
202 {
203  int i, cols;
204  unsigned short ventry, treg;
205  unsigned short linetable[128]; /* should be enough */
206 
207  ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
208  newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
209  npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
210  NPORT_DMODE_W2 | VC2_PROTOCOL);
211  for (i = 0; i < 128; i++) {
212  newport_bfwait(npregs);
213  linetable[i] = npregs->set.dcbdata0.byshort.s1;
214  }
215 
216  newport_xsize = newport_ysize = 0;
217  for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
218  cols = 0;
219  newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
220  npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
221  NPORT_DMODE_W2 | VC2_PROTOCOL);
222  do {
223  newport_bfwait(npregs);
224  treg = npregs->set.dcbdata0.byshort.s1;
225  if ((treg & 1) == 0)
226  cols += (treg >> 7) & 0xfe;
227  if ((treg & 0x80) == 0) {
228  newport_bfwait(npregs);
229  treg = npregs->set.dcbdata0.byshort.s1;
230  }
231  } while ((treg & 0x8000) == 0);
232  if (cols) {
233  if (cols > newport_xsize)
234  newport_xsize = cols;
235  newport_ysize += linetable[i + 1];
236  }
237  }
238  printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
239 }
240 
241 static void newport_get_revisions(void)
242 {
243  unsigned int tmp;
244  unsigned int board_rev;
245  unsigned int rex3_rev;
246  unsigned int vc2_rev;
247  unsigned int cmap_rev;
248  unsigned int xmap9_rev;
249  unsigned int bt445_rev;
250  unsigned int bitplanes;
251 
252  rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
253 
254  npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
255  NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
256  tmp = npregs->set.dcbdata0.bybytes.b3;
257  cmap_rev = tmp & 7;
258  board_rev = (tmp >> 4) & 7;
259  bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
260 
261  npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
262  NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
263  tmp = npregs->set.dcbdata0.bybytes.b3;
264  if ((tmp & 7) < cmap_rev)
265  cmap_rev = (tmp & 7);
266 
267  vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
268 
269  npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
270  XM9_CRS_REVISION | NPORT_DMODE_W1);
271  xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
272 
273  npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
274  BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
275  npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
276  npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
277  BT445_CSR_REVISION | NPORT_DMODE_W1);
278  bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
279 
280 #define L(a) (char)('A'+(a))
281  printk
282  ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
283  board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
284  L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
285 #undef L
286 
287  if (board_rev == 3) /* I don't know all affected revisions */
288  xcurs_correction = 21;
289 }
290 
291 static void newport_exit(void)
292 {
293  int i;
294 
295  /* free memory used by user font */
296  for (i = 0; i < MAX_NR_CONSOLES; i++)
297  newport_set_def_font(i, NULL);
298 }
299 
300 /* Can't be __init, take_over_console may call it later */
301 static const char *newport_startup(void)
302 {
303  int i;
304 
305  npregs->cset.config = NPORT_CFG_GD0;
306 
307  if (newport_wait(npregs))
308  goto out_unmap;
309 
310  npregs->set.xstarti = TESTVAL;
311  if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
312  goto out_unmap;
313 
314  for (i = 0; i < MAX_NR_CONSOLES; i++)
315  font_data[i] = FONT_DATA;
316 
317  newport_reset();
318  newport_get_revisions();
319  newport_get_screensize();
320  newport_has_init = 1;
321 
322  return "SGI Newport";
323 
324 out_unmap:
325  return NULL;
326 }
327 
328 static void newport_init(struct vc_data *vc, int init)
329 {
330  vc->vc_cols = newport_xsize / 8;
331  vc->vc_rows = newport_ysize / 16;
332  vc->vc_can_do_color = 1;
333 }
334 
335 static void newport_deinit(struct vc_data *c)
336 {
337  if (!con_is_bound(&newport_con) && newport_has_init) {
338  newport_exit();
339  newport_has_init = 0;
340  }
341 }
342 
343 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
344  int width)
345 {
346  int xend = ((sx + width) << 3) - 1;
347  int ystart = ((sy << 4) + topscan) & 0x3ff;
348  int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
349 
350  if (logo_active)
351  return;
352 
353  if (ystart < yend) {
354  newport_clear_screen(sx << 3, ystart, xend, yend,
355  (vc->vc_color & 0xf0) >> 4);
356  } else {
357  newport_clear_screen(sx << 3, ystart, xend, 1023,
358  (vc->vc_color & 0xf0) >> 4);
359  newport_clear_screen(sx << 3, 0, xend, yend,
360  (vc->vc_color & 0xf0) >> 4);
361  }
362 }
363 
364 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
365  int xpos)
366 {
367  unsigned char *p;
368 
369  p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
370  charattr = (charattr >> 8) & 0xff;
371  xpos <<= 3;
372  ypos <<= 4;
373 
374  newport_render_background(xpos, ypos, xpos, ypos,
375  (charattr & 0xf0) >> 4);
376 
377  /* Set the color and drawing mode. */
378  newport_wait(npregs);
379  npregs->set.colori = charattr & 0xf;
380  npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
381  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
382  NPORT_DMODE0_L32);
383 
384  /* Set coordinates for bitmap operation. */
385  npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
386  npregs->set.xyendi = ((xpos + 7) << 16);
387  newport_wait(npregs);
388 
389  /* Go, baby, go... */
390  RENDER(npregs, p);
391 }
392 
393 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
394  int count, int ypos, int xpos)
395 {
396  int i;
397  int charattr;
398  unsigned char *p;
399 
400  charattr = (scr_readw(s) >> 8) & 0xff;
401 
402  xpos <<= 3;
403  ypos <<= 4;
404 
405  if (!logo_active)
406  /* Clear the area behing the string */
407  newport_render_background(xpos, ypos,
408  xpos + ((count - 1) << 3), ypos,
409  (charattr & 0xf0) >> 4);
410 
411  newport_wait(npregs);
412 
413  /* Set the color and drawing mode. */
414  npregs->set.colori = charattr & 0xf;
415  npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
416  NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
417  NPORT_DMODE0_L32);
418 
419  for (i = 0; i < count; i++, xpos += 8) {
420  p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
421 
422  newport_wait(npregs);
423 
424  /* Set coordinates for bitmap operation. */
425  npregs->set.xystarti =
426  (xpos << 16) | ((ypos + topscan) & 0x3ff);
427  npregs->set.xyendi = ((xpos + 7) << 16);
428 
429  /* Go, baby, go... */
430  RENDER(npregs, p);
431  }
432 }
433 
434 static void newport_cursor(struct vc_data *vc, int mode)
435 {
436  unsigned short treg;
437  int xcurs, ycurs;
438 
439  switch (mode) {
440  case CM_ERASE:
441  treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
442  newport_vc2_set(npregs, VC2_IREG_CONTROL,
443  (treg & ~(VC2_CTRL_ECDISP)));
444  break;
445 
446  case CM_MOVE:
447  case CM_DRAW:
448  treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
449  newport_vc2_set(npregs, VC2_IREG_CONTROL,
450  (treg | VC2_CTRL_ECDISP));
451  xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
452  ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
453  xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
454  newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
455  newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
456  }
457 }
458 
459 static int newport_switch(struct vc_data *vc)
460 {
461  static int logo_drawn = 0;
462 
463  topscan = 0;
464  npregs->cset.topscan = 0x3ff;
465 
466  if (!logo_drawn) {
467  if (newport_show_logo()) {
468  logo_drawn = 1;
469  logo_active = 1;
470  }
471  }
472 
473  return 1;
474 }
475 
476 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
477 {
478  unsigned short treg;
479 
480  if (blank == 0) {
481  /* unblank console */
482  treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
483  newport_vc2_set(npregs, VC2_IREG_CONTROL,
484  (treg | VC2_CTRL_EDISP));
485  } else {
486  /* blank console */
487  treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
488  newport_vc2_set(npregs, VC2_IREG_CONTROL,
489  (treg & ~(VC2_CTRL_EDISP)));
490  }
491  return 1;
492 }
493 
494 static int newport_set_font(int unit, struct console_font *op)
495 {
496  int w = op->width;
497  int h = op->height;
498  int size = h * op->charcount;
499  int i;
500  unsigned char *new_data, *data = op->data, *p;
501 
502  /* ladis: when I grow up, there will be a day... and more sizes will
503  * be supported ;-) */
504  if ((w != 8) || (h != 16)
505  || (op->charcount != 256 && op->charcount != 512))
506  return -EINVAL;
507 
508  if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
509  GFP_USER))) return -ENOMEM;
510 
511  new_data += FONT_EXTRA_WORDS * sizeof(int);
512  FNTSIZE(new_data) = size;
513  FNTCHARCNT(new_data) = op->charcount;
514  REFCOUNT(new_data) = 0; /* usage counter */
515 
516  p = new_data;
517  for (i = 0; i < op->charcount; i++) {
518  memcpy(p, data, h);
519  data += 32;
520  p += h;
521  }
522 
523  /* check if font is already used by other console */
524  for (i = 0; i < MAX_NR_CONSOLES; i++) {
525  if (font_data[i] != FONT_DATA
526  && FNTSIZE(font_data[i]) == size
527  && !memcmp(font_data[i], new_data, size)) {
528  kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
529  /* current font is the same as the new one */
530  if (i == unit)
531  return 0;
532  new_data = font_data[i];
533  break;
534  }
535  }
536  /* old font is user font */
537  if (font_data[unit] != FONT_DATA) {
538  if (--REFCOUNT(font_data[unit]) == 0)
539  kfree(font_data[unit] -
540  FONT_EXTRA_WORDS * sizeof(int));
541  }
542  REFCOUNT(new_data)++;
543  font_data[unit] = new_data;
544 
545  return 0;
546 }
547 
548 static int newport_set_def_font(int unit, struct console_font *op)
549 {
550  if (font_data[unit] != FONT_DATA) {
551  if (--REFCOUNT(font_data[unit]) == 0)
552  kfree(font_data[unit] -
553  FONT_EXTRA_WORDS * sizeof(int));
554  font_data[unit] = FONT_DATA;
555  }
556 
557  return 0;
558 }
559 
560 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
561 {
562  return newport_set_def_font(vc->vc_num, op);
563 }
564 
565 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
566 {
567  return newport_set_font(vc->vc_num, font);
568 }
569 
570 static int newport_set_palette(struct vc_data *vc, unsigned char *table)
571 {
572  return -EINVAL;
573 }
574 
575 static int newport_scrolldelta(struct vc_data *vc, int lines)
576 {
577  /* there is (nearly) no off-screen memory, so we can't scroll back */
578  return 0;
579 }
580 
581 static int newport_scroll(struct vc_data *vc, int t, int b, int dir,
582  int lines)
583 {
584  int count, x, y;
585  unsigned short *s, *d;
586  unsigned short chattr;
587 
588  logo_active = 0; /* it's time to disable the logo now.. */
589 
590  if (t == 0 && b == vc->vc_rows) {
591  if (dir == SM_UP) {
592  topscan = (topscan + (lines << 4)) & 0x3ff;
593  newport_clear_lines(vc->vc_rows - lines,
594  vc->vc_rows - 1,
595  (vc->vc_color & 0xf0) >> 4);
596  } else {
597  topscan = (topscan + (-lines << 4)) & 0x3ff;
598  newport_clear_lines(0, lines - 1,
599  (vc->vc_color & 0xf0) >> 4);
600  }
601  npregs->cset.topscan = (topscan - 1) & 0x3ff;
602  return 0;
603  }
604 
605  count = (b - t - lines) * vc->vc_cols;
606  if (dir == SM_UP) {
607  x = 0;
608  y = t;
609  s = (unsigned short *) (vc->vc_origin +
610  vc->vc_size_row * (t + lines));
611  d = (unsigned short *) (vc->vc_origin +
612  vc->vc_size_row * t);
613  while (count--) {
614  chattr = scr_readw(s++);
615  if (chattr != scr_readw(d)) {
616  newport_putc(vc, chattr, y, x);
617  scr_writew(chattr, d);
618  }
619  d++;
620  if (++x == vc->vc_cols) {
621  x = 0;
622  y++;
623  }
624  }
625  d = (unsigned short *) (vc->vc_origin +
626  vc->vc_size_row * (b - lines));
627  x = 0;
628  y = b - lines;
629  for (count = 0; count < (lines * vc->vc_cols); count++) {
630  if (scr_readw(d) != vc->vc_video_erase_char) {
631  newport_putc(vc, vc->vc_video_erase_char,
632  y, x);
633  scr_writew(vc->vc_video_erase_char, d);
634  }
635  d++;
636  if (++x == vc->vc_cols) {
637  x = 0;
638  y++;
639  }
640  }
641  } else {
642  x = vc->vc_cols - 1;
643  y = b - 1;
644  s = (unsigned short *) (vc->vc_origin +
645  vc->vc_size_row * (b - lines) - 2);
646  d = (unsigned short *) (vc->vc_origin +
647  vc->vc_size_row * b - 2);
648  while (count--) {
649  chattr = scr_readw(s--);
650  if (chattr != scr_readw(d)) {
651  newport_putc(vc, chattr, y, x);
652  scr_writew(chattr, d);
653  }
654  d--;
655  if (x-- == 0) {
656  x = vc->vc_cols - 1;
657  y--;
658  }
659  }
660  d = (unsigned short *) (vc->vc_origin +
661  vc->vc_size_row * t);
662  x = 0;
663  y = t;
664  for (count = 0; count < (lines * vc->vc_cols); count++) {
665  if (scr_readw(d) != vc->vc_video_erase_char) {
666  newport_putc(vc, vc->vc_video_erase_char,
667  y, x);
668  scr_writew(vc->vc_video_erase_char, d);
669  }
670  d++;
671  if (++x == vc->vc_cols) {
672  x = 0;
673  y++;
674  }
675  }
676  }
677  return 1;
678 }
679 
680 static void newport_bmove(struct vc_data *vc, int sy, int sx, int dy,
681  int dx, int h, int w)
682 {
683  short xs, ys, xe, ye, xoffs, yoffs, tmp;
684 
685  xs = sx << 3;
686  xe = ((sx + w) << 3) - 1;
687  /*
688  * as bmove is only used to move stuff around in the same line
689  * (h == 1), we don't care about wrap arounds caused by topscan != 0
690  */
691  ys = ((sy << 4) + topscan) & 0x3ff;
692  ye = (((sy + h) << 4) - 1 + topscan) & 0x3ff;
693  xoffs = (dx - sx) << 3;
694  yoffs = (dy - sy) << 4;
695  if (xoffs > 0) {
696  /* move to the right, exchange starting points */
697  tmp = xe;
698  xe = xs;
699  xs = tmp;
700  }
701  newport_wait(npregs);
702  npregs->set.drawmode0 = (NPORT_DMODE0_S2S | NPORT_DMODE0_BLOCK |
703  NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
704  | NPORT_DMODE0_STOPY);
705  npregs->set.xystarti = (xs << 16) | ys;
706  npregs->set.xyendi = (xe << 16) | ye;
707  npregs->go.xymove = (xoffs << 16) | yoffs;
708 }
709 
710 static int newport_dummy(struct vc_data *c)
711 {
712  return 0;
713 }
714 
715 #define DUMMY (void *) newport_dummy
716 
717 const struct consw newport_con = {
718  .owner = THIS_MODULE,
719  .con_startup = newport_startup,
720  .con_init = newport_init,
721  .con_deinit = newport_deinit,
722  .con_clear = newport_clear,
723  .con_putc = newport_putc,
724  .con_putcs = newport_putcs,
725  .con_cursor = newport_cursor,
726  .con_scroll = newport_scroll,
727  .con_bmove = newport_bmove,
728  .con_switch = newport_switch,
729  .con_blank = newport_blank,
730  .con_font_set = newport_font_set,
731  .con_font_default = newport_font_default,
732  .con_set_palette = newport_set_palette,
733  .con_scrolldelta = newport_scrolldelta,
734  .con_set_origin = DUMMY,
735  .con_save_screen = DUMMY
736 };
737 
738 static int newport_probe(struct gio_device *dev,
739  const struct gio_device_id *id)
740 {
741  unsigned long newport_addr;
742 
743  if (!dev->resource.start)
744  return -EINVAL;
745 
746  if (npregs)
747  return -EBUSY; /* we only support one Newport as console */
748 
749  newport_addr = dev->resource.start + 0xF0000;
750  if (!request_mem_region(newport_addr, 0x10000, "Newport"))
751  return -ENODEV;
752 
753  npregs = (struct newport_regs *)/* ioremap cannot fail */
754  ioremap(newport_addr, sizeof(struct newport_regs));
755 
756  return take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
757 }
758 
759 static void newport_remove(struct gio_device *dev)
760 {
761  give_up_console(&newport_con);
762  iounmap((void *)npregs);
763 }
764 
765 static struct gio_device_id newport_ids[] = {
766  { .id = 0x7e },
767  { .id = 0xff }
768 };
769 
770 MODULE_ALIAS("gio:7e");
771 
772 static struct gio_driver newport_driver = {
773  .name = "newport",
774  .id_table = newport_ids,
775  .probe = newport_probe,
776  .remove = newport_remove,
777 };
778 
779 int __init newport_console_init(void)
780 {
781  return gio_register_driver(&newport_driver);
782 }
783 
784 void __exit newport_console_exit(void)
785 {
786  gio_unregister_driver(&newport_driver);
787 }
788 
789 module_init(newport_console_init);
790 module_exit(newport_console_exit);
791 
792 MODULE_LICENSE("GPL");
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