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WIP FPC-III support
[linux/fpc-iii.git] / drivers / video / console / newport_con.c
blobd9c682ae03926aa4cce6f8ee61765054e495de5c
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/gio_device.h>
28
29 #include <video/newport.h>
30
31 #include <linux/linux_logo.h>
32 #include <linux/font.h>
33
34 #define NEWPORT_LEN 0x10000
35
36 #define FONT_DATA ((unsigned char *)font_vga_8x16.data)
37
38 static unsigned char *font_data[MAX_NR_CONSOLES];
39
40 static struct newport_regs *npregs;
41 static unsigned long newport_addr;
42
43 static int logo_active;
44 static int topscan;
45 static int xcurs_correction = 29;
46 static int newport_xsize;
47 static int newport_ysize;
48 static int newport_has_init;
49
50 static int newport_set_def_font(int unit, struct console_font *op);
51
52 #define BMASK(c) (c << 24)
53
54 #define RENDER(regs, cp) do { \
55 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
56 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
57 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
58 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
59 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
60 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
61 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
62 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
63 } while(0)
64
65 #define TESTVAL 0xdeadbeef
66 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
67
68 static inline void newport_render_background(int xstart, int ystart,
69 int xend, int yend, int ci)
70 {
71 newport_wait(npregs);
72 npregs->set.wrmask = 0xffffffff;
73 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
74 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
75 | NPORT_DMODE0_STOPY);
76 npregs->set.colori = ci;
77 npregs->set.xystarti =
78 (xstart << 16) | ((ystart + topscan) & 0x3ff);
79 npregs->go.xyendi =
80 ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
81 }
82
83 static inline void newport_init_cmap(void)
84 {
85 unsigned short i;
86
87 for (i = 0; i < 16; i++) {
88 newport_bfwait(npregs);
89 newport_cmap_setaddr(npregs, color_table[i]);
90 newport_cmap_setrgb(npregs,
91 default_red[i],
92 default_grn[i], default_blu[i]);
93 }
94 }
95
96 static const struct linux_logo *newport_show_logo(void)
97 {
98 #ifdef CONFIG_LOGO_SGI_CLUT224
99 const struct linux_logo *logo = fb_find_logo(8);
100 const unsigned char *clut;
101 const unsigned char *data;
102 unsigned long i;
103
104 if (!logo)
105 return NULL;
106 clut = logo->clut;
107 data = logo->data;
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
127 return logo;
128 #else
129 return NULL;
130 #endif /* CONFIG_LOGO_SGI_CLUT224 */
131 }
132
133 static inline void newport_clear_screen(int xstart, int ystart, int xend,
134 int yend, int ci)
135 {
136 if (logo_active)
137 return;
138
139 newport_wait(npregs);
140 npregs->set.wrmask = 0xffffffff;
141 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
142 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
143 | NPORT_DMODE0_STOPY);
144 npregs->set.colori = ci;
145 npregs->set.xystarti = (xstart << 16) | ystart;
146 npregs->go.xyendi = (xend << 16) | yend;
147 }
148
149 static inline void newport_clear_lines(int ystart, int yend, int ci)
150 {
151 ystart = ((ystart << 4) + topscan) & 0x3ff;
152 yend = ((yend << 4) + topscan + 15) & 0x3ff;
153 newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
154 }
155
156 static void newport_reset(void)
157 {
158 unsigned short treg;
159 int i;
160
161 newport_wait(npregs);
162 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
163 newport_vc2_set(npregs, VC2_IREG_CONTROL,
164 (treg | VC2_CTRL_EVIDEO));
165
166 treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
167 newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
168 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
169 NPORT_DMODE_W2 | VC2_PROTOCOL);
170 for (i = 0; i < 128; i++) {
171 newport_bfwait(npregs);
172 if (i == 92 || i == 94)
173 npregs->set.dcbdata0.byshort.s1 = 0xff00;
174 else
175 npregs->set.dcbdata0.byshort.s1 = 0x0000;
176 }
177
178 newport_init_cmap();
179
180 /* turn off popup plane */
181 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
182 XM9_CRS_CONFIG | NPORT_DMODE_W1);
183 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
184 npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
185 XM9_CRS_CONFIG | NPORT_DMODE_W1);
186 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
187
188 topscan = 0;
189 npregs->cset.topscan = 0x3ff;
190 npregs->cset.xywin = (4096 << 16) | 4096;
191
192 /* Clear the screen. */
193 newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
194 }
195
196 /*
197 * calculate the actual screen size by reading
198 * the video timing out of the VC2
199 */
200 static void newport_get_screensize(void)
201 {
202 int i, cols;
203 unsigned short ventry, treg;
204 unsigned short linetable[128]; /* should be enough */
205
206 ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
207 newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
208 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
209 NPORT_DMODE_W2 | VC2_PROTOCOL);
210 for (i = 0; i < 128; i++) {
211 newport_bfwait(npregs);
212 linetable[i] = npregs->set.dcbdata0.byshort.s1;
213 }
214
215 newport_xsize = newport_ysize = 0;
216 for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
217 cols = 0;
218 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
219 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
220 NPORT_DMODE_W2 | VC2_PROTOCOL);
221 do {
222 newport_bfwait(npregs);
223 treg = npregs->set.dcbdata0.byshort.s1;
224 if ((treg & 1) == 0)
225 cols += (treg >> 7) & 0xfe;
226 if ((treg & 0x80) == 0) {
227 newport_bfwait(npregs);
228 treg = npregs->set.dcbdata0.byshort.s1;
229 }
230 } while ((treg & 0x8000) == 0);
231 if (cols) {
232 if (cols > newport_xsize)
233 newport_xsize = cols;
234 newport_ysize += linetable[i + 1];
235 }
236 }
237 printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
238 }
239
240 static void newport_get_revisions(void)
241 {
242 unsigned int tmp;
243 unsigned int board_rev;
244 unsigned int rex3_rev;
245 unsigned int vc2_rev;
246 unsigned int cmap_rev;
247 unsigned int xmap9_rev;
248 unsigned int bt445_rev;
249 unsigned int bitplanes;
250
251 rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
252
253 npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
254 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
255 tmp = npregs->set.dcbdata0.bybytes.b3;
256 cmap_rev = tmp & 7;
257 board_rev = (tmp >> 4) & 7;
258 bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
259
260 npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
261 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
262 tmp = npregs->set.dcbdata0.bybytes.b3;
263 if ((tmp & 7) < cmap_rev)
264 cmap_rev = (tmp & 7);
265
266 vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
267
268 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
269 XM9_CRS_REVISION | NPORT_DMODE_W1);
270 xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
271
272 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
273 BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
274 npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
275 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
276 BT445_CSR_REVISION | NPORT_DMODE_W1);
277 bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
278
279 #define L(a) (char)('A'+(a))
280 printk
281 ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
282 board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
283 L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
284 #undef L
285
286 if (board_rev == 3) /* I don't know all affected revisions */
287 xcurs_correction = 21;
288 }
289
290 static void newport_exit(void)
291 {
292 int i;
293
294 /* free memory used by user font */
295 for (i = 0; i < MAX_NR_CONSOLES; i++)
296 newport_set_def_font(i, NULL);
297 }
298
299 /* Can't be __init, do_take_over_console may call it later */
300 static const char *newport_startup(void)
301 {
302 int i;
303
304 npregs->cset.config = NPORT_CFG_GD0;
305
306 if (newport_wait(npregs))
307 goto out_unmap;
308
309 npregs->set.xstarti = TESTVAL;
310 if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
311 goto out_unmap;
312
313 for (i = 0; i < MAX_NR_CONSOLES; i++)
314 font_data[i] = FONT_DATA;
315
316 newport_reset();
317 newport_get_revisions();
318 newport_get_screensize();
319 newport_has_init = 1;
320
321 return "SGI Newport";
322
323 out_unmap:
324 return NULL;
325 }
326
327 static void newport_init(struct vc_data *vc, int init)
328 {
329 int cols, rows;
330
331 cols = newport_xsize / 8;
332 rows = newport_ysize / 16;
333 vc->vc_can_do_color = 1;
334 if (init) {
335 vc->vc_cols = cols;
336 vc->vc_rows = rows;
337 } else
338 vc_resize(vc, cols, rows);
339 }
340
341 static void newport_deinit(struct vc_data *c)
342 {
343 if (!con_is_bound(&newport_con) && newport_has_init) {
344 newport_exit();
345 newport_has_init = 0;
346 }
347 }
348
349 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
350 int width)
351 {
352 int xend = ((sx + width) << 3) - 1;
353 int ystart = ((sy << 4) + topscan) & 0x3ff;
354 int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
355
356 if (logo_active)
357 return;
358
359 if (ystart < yend) {
360 newport_clear_screen(sx << 3, ystart, xend, yend,
361 (vc->state.color & 0xf0) >> 4);
362 } else {
363 newport_clear_screen(sx << 3, ystart, xend, 1023,
364 (vc->state.color & 0xf0) >> 4);
365 newport_clear_screen(sx << 3, 0, xend, yend,
366 (vc->state.color & 0xf0) >> 4);
367 }
368 }
369
370 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
371 int xpos)
372 {
373 unsigned char *p;
374
375 p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
376 charattr = (charattr >> 8) & 0xff;
377 xpos <<= 3;
378 ypos <<= 4;
379
380 newport_render_background(xpos, ypos, xpos, ypos,
381 (charattr & 0xf0) >> 4);
382
383 /* Set the color and drawing mode. */
384 newport_wait(npregs);
385 npregs->set.colori = charattr & 0xf;
386 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
387 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
388 NPORT_DMODE0_L32);
389
390 /* Set coordinates for bitmap operation. */
391 npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
392 npregs->set.xyendi = ((xpos + 7) << 16);
393 newport_wait(npregs);
394
395 /* Go, baby, go... */
396 RENDER(npregs, p);
397 }
398
399 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
400 int count, int ypos, int xpos)
401 {
402 int i;
403 int charattr;
404 unsigned char *p;
405
406 charattr = (scr_readw(s) >> 8) & 0xff;
407
408 xpos <<= 3;
409 ypos <<= 4;
410
411 if (!logo_active)
412 /* Clear the area behing the string */
413 newport_render_background(xpos, ypos,
414 xpos + ((count - 1) << 3), ypos,
415 (charattr & 0xf0) >> 4);
416
417 newport_wait(npregs);
418
419 /* Set the color and drawing mode. */
420 npregs->set.colori = charattr & 0xf;
421 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
422 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
423 NPORT_DMODE0_L32);
424
425 for (i = 0; i < count; i++, xpos += 8) {
426 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
427
428 newport_wait(npregs);
429
430 /* Set coordinates for bitmap operation. */
431 npregs->set.xystarti =
432 (xpos << 16) | ((ypos + topscan) & 0x3ff);
433 npregs->set.xyendi = ((xpos + 7) << 16);
434
435 /* Go, baby, go... */
436 RENDER(npregs, p);
437 }
438 }
439
440 static void newport_cursor(struct vc_data *vc, int mode)
441 {
442 unsigned short treg;
443 int xcurs, ycurs;
444
445 switch (mode) {
446 case CM_ERASE:
447 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
448 newport_vc2_set(npregs, VC2_IREG_CONTROL,
449 (treg & ~(VC2_CTRL_ECDISP)));
450 break;
451
452 case CM_MOVE:
453 case CM_DRAW:
454 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
455 newport_vc2_set(npregs, VC2_IREG_CONTROL,
456 (treg | VC2_CTRL_ECDISP));
457 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
458 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
459 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
460 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
461 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
462 }
463 }
464
465 static int newport_switch(struct vc_data *vc)
466 {
467 static int logo_drawn = 0;
468
469 topscan = 0;
470 npregs->cset.topscan = 0x3ff;
471
472 if (!logo_drawn) {
473 if (newport_show_logo()) {
474 logo_drawn = 1;
475 logo_active = 1;
476 }
477 }
478
479 return 1;
480 }
481
482 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
483 {
484 unsigned short treg;
485
486 if (blank == 0) {
487 /* unblank console */
488 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
489 newport_vc2_set(npregs, VC2_IREG_CONTROL,
490 (treg | VC2_CTRL_EDISP));
491 } else {
492 /* blank console */
493 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
494 newport_vc2_set(npregs, VC2_IREG_CONTROL,
495 (treg & ~(VC2_CTRL_EDISP)));
496 }
497 return 1;
498 }
499
500 static int newport_set_font(int unit, struct console_font *op)
501 {
502 int w = op->width;
503 int h = op->height;
504 int size = h * op->charcount;
505 int i;
506 unsigned char *new_data, *data = op->data, *p;
507
508 /* ladis: when I grow up, there will be a day... and more sizes will
509 * be supported ;-) */
510 if ((w != 8) || (h != 16)
511 || (op->charcount != 256 && op->charcount != 512))
512 return -EINVAL;
513
514 if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
515 GFP_USER))) return -ENOMEM;
516
517 new_data += FONT_EXTRA_WORDS * sizeof(int);
518 FNTSIZE(new_data) = size;
519 FNTCHARCNT(new_data) = op->charcount;
520 REFCOUNT(new_data) = 0; /* usage counter */
521 FNTSUM(new_data) = 0;
522
523 p = new_data;
524 for (i = 0; i < op->charcount; i++) {
525 memcpy(p, data, h);
526 data += 32;
527 p += h;
528 }
529
530 /* check if font is already used by other console */
531 for (i = 0; i < MAX_NR_CONSOLES; i++) {
532 if (font_data[i] != FONT_DATA
533 && FNTSIZE(font_data[i]) == size
534 && !memcmp(font_data[i], new_data, size)) {
535 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
536 /* current font is the same as the new one */
537 if (i == unit)
538 return 0;
539 new_data = font_data[i];
540 break;
541 }
542 }
543 /* old font is user font */
544 if (font_data[unit] != FONT_DATA) {
545 if (--REFCOUNT(font_data[unit]) == 0)
546 kfree(font_data[unit] -
547 FONT_EXTRA_WORDS * sizeof(int));
548 }
549 REFCOUNT(new_data)++;
550 font_data[unit] = new_data;
551
552 return 0;
553 }
554
555 static int newport_set_def_font(int unit, struct console_font *op)
556 {
557 if (font_data[unit] != FONT_DATA) {
558 if (--REFCOUNT(font_data[unit]) == 0)
559 kfree(font_data[unit] -
560 FONT_EXTRA_WORDS * sizeof(int));
561 font_data[unit] = FONT_DATA;
562 }
563
564 return 0;
565 }
566
567 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
568 {
569 return newport_set_def_font(vc->vc_num, op);
570 }
571
572 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
573 {
574 return newport_set_font(vc->vc_num, font);
575 }
576
577 static bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
578 enum con_scroll dir, unsigned int lines)
579 {
580 int count, x, y;
581 unsigned short *s, *d;
582 unsigned short chattr;
583
584 logo_active = 0; /* it's time to disable the logo now.. */
585
586 if (t == 0 && b == vc->vc_rows) {
587 if (dir == SM_UP) {
588 topscan = (topscan + (lines << 4)) & 0x3ff;
589 newport_clear_lines(vc->vc_rows - lines,
590 vc->vc_rows - 1,
591 (vc->state.color & 0xf0) >> 4);
592 } else {
593 topscan = (topscan + (-lines << 4)) & 0x3ff;
594 newport_clear_lines(0, lines - 1,
595 (vc->state.color & 0xf0) >> 4);
596 }
597 npregs->cset.topscan = (topscan - 1) & 0x3ff;
598 return false;
599 }
600
601 count = (b - t - lines) * vc->vc_cols;
602 if (dir == SM_UP) {
603 x = 0;
604 y = t;
605 s = (unsigned short *) (vc->vc_origin +
606 vc->vc_size_row * (t + lines));
607 d = (unsigned short *) (vc->vc_origin +
608 vc->vc_size_row * t);
609 while (count--) {
610 chattr = scr_readw(s++);
611 if (chattr != scr_readw(d)) {
612 newport_putc(vc, chattr, y, x);
613 scr_writew(chattr, d);
614 }
615 d++;
616 if (++x == vc->vc_cols) {
617 x = 0;
618 y++;
619 }
620 }
621 d = (unsigned short *) (vc->vc_origin +
622 vc->vc_size_row * (b - lines));
623 x = 0;
624 y = b - lines;
625 for (count = 0; count < (lines * vc->vc_cols); count++) {
626 if (scr_readw(d) != vc->vc_video_erase_char) {
627 newport_putc(vc, vc->vc_video_erase_char,
628 y, x);
629 scr_writew(vc->vc_video_erase_char, d);
630 }
631 d++;
632 if (++x == vc->vc_cols) {
633 x = 0;
634 y++;
635 }
636 }
637 } else {
638 x = vc->vc_cols - 1;
639 y = b - 1;
640 s = (unsigned short *) (vc->vc_origin +
641 vc->vc_size_row * (b - lines) - 2);
642 d = (unsigned short *) (vc->vc_origin +
643 vc->vc_size_row * b - 2);
644 while (count--) {
645 chattr = scr_readw(s--);
646 if (chattr != scr_readw(d)) {
647 newport_putc(vc, chattr, y, x);
648 scr_writew(chattr, d);
649 }
650 d--;
651 if (x-- == 0) {
652 x = vc->vc_cols - 1;
653 y--;
654 }
655 }
656 d = (unsigned short *) (vc->vc_origin +
657 vc->vc_size_row * t);
658 x = 0;
659 y = t;
660 for (count = 0; count < (lines * vc->vc_cols); count++) {
661 if (scr_readw(d) != vc->vc_video_erase_char) {
662 newport_putc(vc, vc->vc_video_erase_char,
663 y, x);
664 scr_writew(vc->vc_video_erase_char, d);
665 }
666 d++;
667 if (++x == vc->vc_cols) {
668 x = 0;
669 y++;
670 }
671 }
672 }
673 return true;
674 }
675
676 static void newport_save_screen(struct vc_data *vc) { }
677
678 const struct consw newport_con = {
679 .owner = THIS_MODULE,
680 .con_startup = newport_startup,
681 .con_init = newport_init,
682 .con_deinit = newport_deinit,
683 .con_clear = newport_clear,
684 .con_putc = newport_putc,
685 .con_putcs = newport_putcs,
686 .con_cursor = newport_cursor,
687 .con_scroll = newport_scroll,
688 .con_switch = newport_switch,
689 .con_blank = newport_blank,
690 .con_font_set = newport_font_set,
691 .con_font_default = newport_font_default,
692 .con_save_screen = newport_save_screen
693 };
694
695 static int newport_probe(struct gio_device *dev,
696 const struct gio_device_id *id)
697 {
698 int err;
699
700 if (!dev->resource.start)
701 return -EINVAL;
702
703 if (npregs)
704 return -EBUSY; /* we only support one Newport as console */
705
706 newport_addr = dev->resource.start + 0xF0000;
707 if (!request_mem_region(newport_addr, NEWPORT_LEN, "Newport"))
708 return -ENODEV;
709
710 npregs = (struct newport_regs *)/* ioremap cannot fail */
711 ioremap(newport_addr, sizeof(struct newport_regs));
712 console_lock();
713 err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
714 console_unlock();
715
716 if (err) {
717 iounmap((void *)npregs);
718 release_mem_region(newport_addr, NEWPORT_LEN);
719 }
720 return err;
721 }
722
723 static void newport_remove(struct gio_device *dev)
724 {
725 give_up_console(&newport_con);
726 iounmap((void *)npregs);
727 release_mem_region(newport_addr, NEWPORT_LEN);
728 }
729
730 static struct gio_device_id newport_ids[] = {
731 { .id = 0x7e },
732 { .id = 0xff }
733 };
734
735 MODULE_ALIAS("gio:7e");
736
737 static struct gio_driver newport_driver = {
738 .name = "newport",
739 .id_table = newport_ids,
740 .probe = newport_probe,
741 .remove = newport_remove,
742 };
743 module_driver(newport_driver, gio_register_driver, gio_unregister_driver);
744
745 MODULE_LICENSE("GPL");
Linux with added FPC-III support