?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / video / console / newport_con.c
blob00dddf6e08b0c5def98f86f59765efe78018278e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * newport_con.c: Abscon for newport hardware
4 *
5 * (C) 1998 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
6 * (C) 1999 Ulf Carlsson (ulfc@thepuffingruop.com)
7 *
8 * This driver is based on sgicons.c and cons_newport.
9 *
10 * Copyright (C) 1996 David S. Miller (davem@davemloft.net)
11 * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx)
12 */
13 #include <linux/init.h>
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/kd.h>
17 #include <linux/selection.h>
18 #include <linux/console.h>
19 #include <linux/vt_kern.h>
20 #include <linux/mm.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23
24 #include <asm/io.h>
25 #include <linux/uaccess.h>
26 #include <asm/page.h>
27 #include <asm/pgtable.h>
28 #include <asm/gio_device.h>
29
30 #include <video/newport.h>
31
32 #include <linux/linux_logo.h>
33 #include <linux/font.h>
34
35 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
36
37 /* borrowed from fbcon.c */
38 #define REFCOUNT(fd) (((int *)(fd))[-1])
39 #define FNTSIZE(fd) (((int *)(fd))[-2])
40 #define FNTCHARCNT(fd) (((int *)(fd))[-3])
41 #define FONT_EXTRA_WORDS 3
42
43 static unsigned char *font_data[MAX_NR_CONSOLES];
44
45 static struct newport_regs *npregs;
46
47 static int logo_active;
48 static int topscan;
49 static int xcurs_correction = 29;
50 static int newport_xsize;
51 static int newport_ysize;
52 static int newport_has_init;
53
54 static int newport_set_def_font(int unit, struct console_font *op);
55
56 #define BMASK(c) (c << 24)
57
58 #define RENDER(regs, cp) do { \
59 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
60 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
61 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
62 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
63 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
64 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
65 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
66 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
67 } while(0)
68
69 #define TESTVAL 0xdeadbeef
70 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
71
72 static inline void newport_render_background(int xstart, int ystart,
73 int xend, int yend, int ci)
74 {
75 newport_wait(npregs);
76 npregs->set.wrmask = 0xffffffff;
77 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
78 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
79 | NPORT_DMODE0_STOPY);
80 npregs->set.colori = ci;
81 npregs->set.xystarti =
82 (xstart << 16) | ((ystart + topscan) & 0x3ff);
83 npregs->go.xyendi =
84 ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
85 }
86
87 static inline void newport_init_cmap(void)
88 {
89 unsigned short i;
90
91 for (i = 0; i < 16; i++) {
92 newport_bfwait(npregs);
93 newport_cmap_setaddr(npregs, color_table[i]);
94 newport_cmap_setrgb(npregs,
95 default_red[i],
96 default_grn[i], default_blu[i]);
97 }
98 }
99
100 static const struct linux_logo *newport_show_logo(void)
101 {
102 #ifdef CONFIG_LOGO_SGI_CLUT224
103 const struct linux_logo *logo = fb_find_logo(8);
104 const unsigned char *clut;
105 const unsigned char *data;
106 unsigned long i;
107
108 if (!logo)
109 return NULL;
110 clut = logo->clut;
111 data = logo->data;
112
113 for (i = 0; i < logo->clutsize; i++) {
114 newport_bfwait(npregs);
115 newport_cmap_setaddr(npregs, i + 0x20);
116 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
117 clut += 3;
118 }
119
120 newport_wait(npregs);
121 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
122 NPORT_DMODE0_CHOST);
123
124 npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
125 npregs->set.xyendi = ((newport_xsize - 1) << 16);
126 newport_wait(npregs);
127
128 for (i = 0; i < logo->width*logo->height; i++)
129 npregs->go.hostrw0 = *data++ << 24;
130
131 return logo;
132 #endif /* CONFIG_LOGO_SGI_CLUT224 */
133 }
134
135 static inline void newport_clear_screen(int xstart, int ystart, int xend,
136 int yend, int ci)
137 {
138 if (logo_active)
139 return;
140
141 newport_wait(npregs);
142 npregs->set.wrmask = 0xffffffff;
143 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
144 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
145 | NPORT_DMODE0_STOPY);
146 npregs->set.colori = ci;
147 npregs->set.xystarti = (xstart << 16) | ystart;
148 npregs->go.xyendi = (xend << 16) | yend;
149 }
150
151 static inline void newport_clear_lines(int ystart, int yend, int ci)
152 {
153 ystart = ((ystart << 4) + topscan) & 0x3ff;
154 yend = ((yend << 4) + topscan + 15) & 0x3ff;
155 newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
156 }
157
158 static void newport_reset(void)
159 {
160 unsigned short treg;
161 int i;
162
163 newport_wait(npregs);
164 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
165 newport_vc2_set(npregs, VC2_IREG_CONTROL,
166 (treg | VC2_CTRL_EVIDEO));
167
168 treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
169 newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
170 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
171 NPORT_DMODE_W2 | VC2_PROTOCOL);
172 for (i = 0; i < 128; i++) {
173 newport_bfwait(npregs);
174 if (i == 92 || i == 94)
175 npregs->set.dcbdata0.byshort.s1 = 0xff00;
176 else
177 npregs->set.dcbdata0.byshort.s1 = 0x0000;
178 }
179
180 newport_init_cmap();
181
182 /* turn off popup plane */
183 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
184 XM9_CRS_CONFIG | NPORT_DMODE_W1);
185 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
186 npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
187 XM9_CRS_CONFIG | NPORT_DMODE_W1);
188 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
189
190 topscan = 0;
191 npregs->cset.topscan = 0x3ff;
192 npregs->cset.xywin = (4096 << 16) | 4096;
193
194 /* Clear the screen. */
195 newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
196 }
197
198 /*
199 * calculate the actual screen size by reading
200 * the video timing out of the VC2
201 */
202 static void newport_get_screensize(void)
203 {
204 int i, cols;
205 unsigned short ventry, treg;
206 unsigned short linetable[128]; /* should be enough */
207
208 ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
209 newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
210 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
211 NPORT_DMODE_W2 | VC2_PROTOCOL);
212 for (i = 0; i < 128; i++) {
213 newport_bfwait(npregs);
214 linetable[i] = npregs->set.dcbdata0.byshort.s1;
215 }
216
217 newport_xsize = newport_ysize = 0;
218 for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
219 cols = 0;
220 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
221 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
222 NPORT_DMODE_W2 | VC2_PROTOCOL);
223 do {
224 newport_bfwait(npregs);
225 treg = npregs->set.dcbdata0.byshort.s1;
226 if ((treg & 1) == 0)
227 cols += (treg >> 7) & 0xfe;
228 if ((treg & 0x80) == 0) {
229 newport_bfwait(npregs);
230 treg = npregs->set.dcbdata0.byshort.s1;
231 }
232 } while ((treg & 0x8000) == 0);
233 if (cols) {
234 if (cols > newport_xsize)
235 newport_xsize = cols;
236 newport_ysize += linetable[i + 1];
237 }
238 }
239 printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
240 }
241
242 static void newport_get_revisions(void)
243 {
244 unsigned int tmp;
245 unsigned int board_rev;
246 unsigned int rex3_rev;
247 unsigned int vc2_rev;
248 unsigned int cmap_rev;
249 unsigned int xmap9_rev;
250 unsigned int bt445_rev;
251 unsigned int bitplanes;
252
253 rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
254
255 npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
256 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
257 tmp = npregs->set.dcbdata0.bybytes.b3;
258 cmap_rev = tmp & 7;
259 board_rev = (tmp >> 4) & 7;
260 bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
261
262 npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
263 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
264 tmp = npregs->set.dcbdata0.bybytes.b3;
265 if ((tmp & 7) < cmap_rev)
266 cmap_rev = (tmp & 7);
267
268 vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
269
270 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
271 XM9_CRS_REVISION | NPORT_DMODE_W1);
272 xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
273
274 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
275 BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
276 npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
277 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
278 BT445_CSR_REVISION | NPORT_DMODE_W1);
279 bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
280
281 #define L(a) (char)('A'+(a))
282 printk
283 ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
284 board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
285 L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
286 #undef L
287
288 if (board_rev == 3) /* I don't know all affected revisions */
289 xcurs_correction = 21;
290 }
291
292 static void newport_exit(void)
293 {
294 int i;
295
296 /* free memory used by user font */
297 for (i = 0; i < MAX_NR_CONSOLES; i++)
298 newport_set_def_font(i, NULL);
299 }
300
301 /* Can't be __init, do_take_over_console may call it later */
302 static const char *newport_startup(void)
303 {
304 int i;
305
306 npregs->cset.config = NPORT_CFG_GD0;
307
308 if (newport_wait(npregs))
309 goto out_unmap;
310
311 npregs->set.xstarti = TESTVAL;
312 if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
313 goto out_unmap;
314
315 for (i = 0; i < MAX_NR_CONSOLES; i++)
316 font_data[i] = FONT_DATA;
317
318 newport_reset();
319 newport_get_revisions();
320 newport_get_screensize();
321 newport_has_init = 1;
322
323 return "SGI Newport";
324
325 out_unmap:
326 return NULL;
327 }
328
329 static void newport_init(struct vc_data *vc, int init)
330 {
331 int cols, rows;
332
333 cols = newport_xsize / 8;
334 rows = newport_ysize / 16;
335 vc->vc_can_do_color = 1;
336 if (init) {
337 vc->vc_cols = cols;
338 vc->vc_rows = rows;
339 } else
340 vc_resize(vc, cols, rows);
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 bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
579 enum con_scroll dir, unsigned int lines)
580 {
581 int count, x, y;
582 unsigned short *s, *d;
583 unsigned short chattr;
584
585 logo_active = 0; /* it's time to disable the logo now.. */
586
587 if (t == 0 && b == vc->vc_rows) {
588 if (dir == SM_UP) {
589 topscan = (topscan + (lines << 4)) & 0x3ff;
590 newport_clear_lines(vc->vc_rows - lines,
591 vc->vc_rows - 1,
592 (vc->vc_color & 0xf0) >> 4);
593 } else {
594 topscan = (topscan + (-lines << 4)) & 0x3ff;
595 newport_clear_lines(0, lines - 1,
596 (vc->vc_color & 0xf0) >> 4);
597 }
598 npregs->cset.topscan = (topscan - 1) & 0x3ff;
599 return false;
600 }
601
602 count = (b - t - lines) * vc->vc_cols;
603 if (dir == SM_UP) {
604 x = 0;
605 y = t;
606 s = (unsigned short *) (vc->vc_origin +
607 vc->vc_size_row * (t + lines));
608 d = (unsigned short *) (vc->vc_origin +
609 vc->vc_size_row * t);
610 while (count--) {
611 chattr = scr_readw(s++);
612 if (chattr != scr_readw(d)) {
613 newport_putc(vc, chattr, y, x);
614 scr_writew(chattr, d);
615 }
616 d++;
617 if (++x == vc->vc_cols) {
618 x = 0;
619 y++;
620 }
621 }
622 d = (unsigned short *) (vc->vc_origin +
623 vc->vc_size_row * (b - lines));
624 x = 0;
625 y = b - lines;
626 for (count = 0; count < (lines * vc->vc_cols); count++) {
627 if (scr_readw(d) != vc->vc_video_erase_char) {
628 newport_putc(vc, vc->vc_video_erase_char,
629 y, x);
630 scr_writew(vc->vc_video_erase_char, d);
631 }
632 d++;
633 if (++x == vc->vc_cols) {
634 x = 0;
635 y++;
636 }
637 }
638 } else {
639 x = vc->vc_cols - 1;
640 y = b - 1;
641 s = (unsigned short *) (vc->vc_origin +
642 vc->vc_size_row * (b - lines) - 2);
643 d = (unsigned short *) (vc->vc_origin +
644 vc->vc_size_row * b - 2);
645 while (count--) {
646 chattr = scr_readw(s--);
647 if (chattr != scr_readw(d)) {
648 newport_putc(vc, chattr, y, x);
649 scr_writew(chattr, d);
650 }
651 d--;
652 if (x-- == 0) {
653 x = vc->vc_cols - 1;
654 y--;
655 }
656 }
657 d = (unsigned short *) (vc->vc_origin +
658 vc->vc_size_row * t);
659 x = 0;
660 y = t;
661 for (count = 0; count < (lines * vc->vc_cols); count++) {
662 if (scr_readw(d) != vc->vc_video_erase_char) {
663 newport_putc(vc, vc->vc_video_erase_char,
664 y, x);
665 scr_writew(vc->vc_video_erase_char, d);
666 }
667 d++;
668 if (++x == vc->vc_cols) {
669 x = 0;
670 y++;
671 }
672 }
673 }
674 return true;
675 }
676
677 static int newport_set_origin(struct vc_data *vc)
678 {
679 return 0;
680 }
681
682 static void newport_save_screen(struct vc_data *vc) { }
683
684 const struct consw newport_con = {
685 .owner = THIS_MODULE,
686 .con_startup = newport_startup,
687 .con_init = newport_init,
688 .con_deinit = newport_deinit,
689 .con_clear = newport_clear,
690 .con_putc = newport_putc,
691 .con_putcs = newport_putcs,
692 .con_cursor = newport_cursor,
693 .con_scroll = newport_scroll,
694 .con_switch = newport_switch,
695 .con_blank = newport_blank,
696 .con_font_set = newport_font_set,
697 .con_font_default = newport_font_default,
698 .con_set_origin = newport_set_origin,
699 .con_save_screen = newport_save_screen
700 };
701
702 static int newport_probe(struct gio_device *dev,
703 const struct gio_device_id *id)
704 {
705 unsigned long newport_addr;
706 int err;
707
708 if (!dev->resource.start)
709 return -EINVAL;
710
711 if (npregs)
712 return -EBUSY; /* we only support one Newport as console */
713
714 newport_addr = dev->resource.start + 0xF0000;
715 if (!request_mem_region(newport_addr, 0x10000, "Newport"))
716 return -ENODEV;
717
718 npregs = (struct newport_regs *)/* ioremap cannot fail */
719 ioremap(newport_addr, sizeof(struct newport_regs));
720 console_lock();
721 err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
722 console_unlock();
723 return err;
724 }
725
726 static void newport_remove(struct gio_device *dev)
727 {
728 give_up_console(&newport_con);
729 iounmap((void *)npregs);
730 }
731
732 static struct gio_device_id newport_ids[] = {
733 { .id = 0x7e },
734 { .id = 0xff }
735 };
736
737 MODULE_ALIAS("gio:7e");
738
739 static struct gio_driver newport_driver = {
740 .name = "newport",
741 .id_table = newport_ids,
742 .probe = newport_probe,
743 .remove = newport_remove,
744 };
745
746 int __init newport_console_init(void)
747 {
748 return gio_register_driver(&newport_driver);
749 }
750
751 void __exit newport_console_exit(void)
752 {
753 gio_unregister_driver(&newport_driver);
754 }
755
756 module_init(newport_console_init);
757 module_exit(newport_console_exit);
758
759 MODULE_LICENSE("GPL");
Linux with added FPC-III support