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Merge tag 'drm-misc-next-2020-06-19' of git://anongit.freedesktop.org/drm/drm-misc...
[mirror_ubuntu-kernels.git] / drivers / video / console / newport_con.c
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 /* 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 static unsigned long newport_addr;
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 static int newport_has_init;
55
56 static int newport_set_def_font(int unit, struct console_font *op);
57
58 #define BMASK(c) (c << 24)
59
60 #define RENDER(regs, cp) do { \
61 (regs)->go.zpattern = BMASK((cp)[0x0]); (regs)->go.zpattern = BMASK((cp)[0x1]); \
62 (regs)->go.zpattern = BMASK((cp)[0x2]); (regs)->go.zpattern = BMASK((cp)[0x3]); \
63 (regs)->go.zpattern = BMASK((cp)[0x4]); (regs)->go.zpattern = BMASK((cp)[0x5]); \
64 (regs)->go.zpattern = BMASK((cp)[0x6]); (regs)->go.zpattern = BMASK((cp)[0x7]); \
65 (regs)->go.zpattern = BMASK((cp)[0x8]); (regs)->go.zpattern = BMASK((cp)[0x9]); \
66 (regs)->go.zpattern = BMASK((cp)[0xa]); (regs)->go.zpattern = BMASK((cp)[0xb]); \
67 (regs)->go.zpattern = BMASK((cp)[0xc]); (regs)->go.zpattern = BMASK((cp)[0xd]); \
68 (regs)->go.zpattern = BMASK((cp)[0xe]); (regs)->go.zpattern = BMASK((cp)[0xf]); \
69 } while(0)
70
71 #define TESTVAL 0xdeadbeef
72 #define XSTI_TO_FXSTART(val) (((val) & 0xffff) << 11)
73
74 static inline void newport_render_background(int xstart, int ystart,
75 int xend, int yend, int ci)
76 {
77 newport_wait(npregs);
78 npregs->set.wrmask = 0xffffffff;
79 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
80 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
81 | NPORT_DMODE0_STOPY);
82 npregs->set.colori = ci;
83 npregs->set.xystarti =
84 (xstart << 16) | ((ystart + topscan) & 0x3ff);
85 npregs->go.xyendi =
86 ((xend + 7) << 16) | ((yend + topscan + 15) & 0x3ff);
87 }
88
89 static inline void newport_init_cmap(void)
90 {
91 unsigned short i;
92
93 for (i = 0; i < 16; i++) {
94 newport_bfwait(npregs);
95 newport_cmap_setaddr(npregs, color_table[i]);
96 newport_cmap_setrgb(npregs,
97 default_red[i],
98 default_grn[i], default_blu[i]);
99 }
100 }
101
102 static const struct linux_logo *newport_show_logo(void)
103 {
104 #ifdef CONFIG_LOGO_SGI_CLUT224
105 const struct linux_logo *logo = fb_find_logo(8);
106 const unsigned char *clut;
107 const unsigned char *data;
108 unsigned long i;
109
110 if (!logo)
111 return NULL;
112 clut = logo->clut;
113 data = logo->data;
114
115 for (i = 0; i < logo->clutsize; i++) {
116 newport_bfwait(npregs);
117 newport_cmap_setaddr(npregs, i + 0x20);
118 newport_cmap_setrgb(npregs, clut[0], clut[1], clut[2]);
119 clut += 3;
120 }
121
122 newport_wait(npregs);
123 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
124 NPORT_DMODE0_CHOST);
125
126 npregs->set.xystarti = ((newport_xsize - logo->width) << 16) | (0);
127 npregs->set.xyendi = ((newport_xsize - 1) << 16);
128 newport_wait(npregs);
129
130 for (i = 0; i < logo->width*logo->height; i++)
131 npregs->go.hostrw0 = *data++ << 24;
132
133 return logo;
134 #endif /* CONFIG_LOGO_SGI_CLUT224 */
135 }
136
137 static inline void newport_clear_screen(int xstart, int ystart, int xend,
138 int yend, int ci)
139 {
140 if (logo_active)
141 return;
142
143 newport_wait(npregs);
144 npregs->set.wrmask = 0xffffffff;
145 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
146 NPORT_DMODE0_DOSETUP | NPORT_DMODE0_STOPX
147 | NPORT_DMODE0_STOPY);
148 npregs->set.colori = ci;
149 npregs->set.xystarti = (xstart << 16) | ystart;
150 npregs->go.xyendi = (xend << 16) | yend;
151 }
152
153 static inline void newport_clear_lines(int ystart, int yend, int ci)
154 {
155 ystart = ((ystart << 4) + topscan) & 0x3ff;
156 yend = ((yend << 4) + topscan + 15) & 0x3ff;
157 newport_clear_screen(0, ystart, 1280 + 63, yend, ci);
158 }
159
160 static void newport_reset(void)
161 {
162 unsigned short treg;
163 int i;
164
165 newport_wait(npregs);
166 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
167 newport_vc2_set(npregs, VC2_IREG_CONTROL,
168 (treg | VC2_CTRL_EVIDEO));
169
170 treg = newport_vc2_get(npregs, VC2_IREG_CENTRY);
171 newport_vc2_set(npregs, VC2_IREG_RADDR, treg);
172 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
173 NPORT_DMODE_W2 | VC2_PROTOCOL);
174 for (i = 0; i < 128; i++) {
175 newport_bfwait(npregs);
176 if (i == 92 || i == 94)
177 npregs->set.dcbdata0.byshort.s1 = 0xff00;
178 else
179 npregs->set.dcbdata0.byshort.s1 = 0x0000;
180 }
181
182 newport_init_cmap();
183
184 /* turn off popup plane */
185 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
186 XM9_CRS_CONFIG | NPORT_DMODE_W1);
187 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
188 npregs->set.dcbmode = (DCB_XMAP1 | R_DCB_XMAP9_PROTOCOL |
189 XM9_CRS_CONFIG | NPORT_DMODE_W1);
190 npregs->set.dcbdata0.bybytes.b3 &= ~XM9_PUPMODE;
191
192 topscan = 0;
193 npregs->cset.topscan = 0x3ff;
194 npregs->cset.xywin = (4096 << 16) | 4096;
195
196 /* Clear the screen. */
197 newport_clear_screen(0, 0, 1280 + 63, 1024, 0);
198 }
199
200 /*
201 * calculate the actual screen size by reading
202 * the video timing out of the VC2
203 */
204 static void newport_get_screensize(void)
205 {
206 int i, cols;
207 unsigned short ventry, treg;
208 unsigned short linetable[128]; /* should be enough */
209
210 ventry = newport_vc2_get(npregs, VC2_IREG_VENTRY);
211 newport_vc2_set(npregs, VC2_IREG_RADDR, ventry);
212 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
213 NPORT_DMODE_W2 | VC2_PROTOCOL);
214 for (i = 0; i < 128; i++) {
215 newport_bfwait(npregs);
216 linetable[i] = npregs->set.dcbdata0.byshort.s1;
217 }
218
219 newport_xsize = newport_ysize = 0;
220 for (i = 0; i < ARRAY_SIZE(linetable) - 1 && linetable[i + 1]; i += 2) {
221 cols = 0;
222 newport_vc2_set(npregs, VC2_IREG_RADDR, linetable[i]);
223 npregs->set.dcbmode = (NPORT_DMODE_AVC2 | VC2_REGADDR_RAM |
224 NPORT_DMODE_W2 | VC2_PROTOCOL);
225 do {
226 newport_bfwait(npregs);
227 treg = npregs->set.dcbdata0.byshort.s1;
228 if ((treg & 1) == 0)
229 cols += (treg >> 7) & 0xfe;
230 if ((treg & 0x80) == 0) {
231 newport_bfwait(npregs);
232 treg = npregs->set.dcbdata0.byshort.s1;
233 }
234 } while ((treg & 0x8000) == 0);
235 if (cols) {
236 if (cols > newport_xsize)
237 newport_xsize = cols;
238 newport_ysize += linetable[i + 1];
239 }
240 }
241 printk("NG1: Screensize %dx%d\n", newport_xsize, newport_ysize);
242 }
243
244 static void newport_get_revisions(void)
245 {
246 unsigned int tmp;
247 unsigned int board_rev;
248 unsigned int rex3_rev;
249 unsigned int vc2_rev;
250 unsigned int cmap_rev;
251 unsigned int xmap9_rev;
252 unsigned int bt445_rev;
253 unsigned int bitplanes;
254
255 rex3_rev = npregs->cset.status & NPORT_STAT_VERS;
256
257 npregs->set.dcbmode = (DCB_CMAP0 | NCMAP_PROTOCOL |
258 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
259 tmp = npregs->set.dcbdata0.bybytes.b3;
260 cmap_rev = tmp & 7;
261 board_rev = (tmp >> 4) & 7;
262 bitplanes = ((board_rev > 1) && (tmp & 0x80)) ? 8 : 24;
263
264 npregs->set.dcbmode = (DCB_CMAP1 | NCMAP_PROTOCOL |
265 NCMAP_REGADDR_RREG | NPORT_DMODE_W1);
266 tmp = npregs->set.dcbdata0.bybytes.b3;
267 if ((tmp & 7) < cmap_rev)
268 cmap_rev = (tmp & 7);
269
270 vc2_rev = (newport_vc2_get(npregs, VC2_IREG_CONFIG) >> 5) & 7;
271
272 npregs->set.dcbmode = (DCB_XMAP0 | R_DCB_XMAP9_PROTOCOL |
273 XM9_CRS_REVISION | NPORT_DMODE_W1);
274 xmap9_rev = npregs->set.dcbdata0.bybytes.b3 & 7;
275
276 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
277 BT445_CSR_ADDR_REG | NPORT_DMODE_W1);
278 npregs->set.dcbdata0.bybytes.b3 = BT445_REVISION_REG;
279 npregs->set.dcbmode = (DCB_BT445 | BT445_PROTOCOL |
280 BT445_CSR_REVISION | NPORT_DMODE_W1);
281 bt445_rev = (npregs->set.dcbdata0.bybytes.b3 >> 4) - 0x0a;
282
283 #define L(a) (char)('A'+(a))
284 printk
285 ("NG1: Revision %d, %d bitplanes, REX3 revision %c, VC2 revision %c, xmap9 revision %c, cmap revision %c, bt445 revision %c\n",
286 board_rev, bitplanes, L(rex3_rev), L(vc2_rev), L(xmap9_rev),
287 L(cmap_rev ? (cmap_rev + 1) : 0), L(bt445_rev));
288 #undef L
289
290 if (board_rev == 3) /* I don't know all affected revisions */
291 xcurs_correction = 21;
292 }
293
294 static void newport_exit(void)
295 {
296 int i;
297
298 /* free memory used by user font */
299 for (i = 0; i < MAX_NR_CONSOLES; i++)
300 newport_set_def_font(i, NULL);
301 }
302
303 /* Can't be __init, do_take_over_console may call it later */
304 static const char *newport_startup(void)
305 {
306 int i;
307
308 npregs->cset.config = NPORT_CFG_GD0;
309
310 if (newport_wait(npregs))
311 goto out_unmap;
312
313 npregs->set.xstarti = TESTVAL;
314 if (npregs->set._xstart.word != XSTI_TO_FXSTART(TESTVAL))
315 goto out_unmap;
316
317 for (i = 0; i < MAX_NR_CONSOLES; i++)
318 font_data[i] = FONT_DATA;
319
320 newport_reset();
321 newport_get_revisions();
322 newport_get_screensize();
323 newport_has_init = 1;
324
325 return "SGI Newport";
326
327 out_unmap:
328 return NULL;
329 }
330
331 static void newport_init(struct vc_data *vc, int init)
332 {
333 int cols, rows;
334
335 cols = newport_xsize / 8;
336 rows = newport_ysize / 16;
337 vc->vc_can_do_color = 1;
338 if (init) {
339 vc->vc_cols = cols;
340 vc->vc_rows = rows;
341 } else
342 vc_resize(vc, cols, rows);
343 }
344
345 static void newport_deinit(struct vc_data *c)
346 {
347 if (!con_is_bound(&newport_con) && newport_has_init) {
348 newport_exit();
349 newport_has_init = 0;
350 }
351 }
352
353 static void newport_clear(struct vc_data *vc, int sy, int sx, int height,
354 int width)
355 {
356 int xend = ((sx + width) << 3) - 1;
357 int ystart = ((sy << 4) + topscan) & 0x3ff;
358 int yend = (((sy + height) << 4) + topscan - 1) & 0x3ff;
359
360 if (logo_active)
361 return;
362
363 if (ystart < yend) {
364 newport_clear_screen(sx << 3, ystart, xend, yend,
365 (vc->vc_color & 0xf0) >> 4);
366 } else {
367 newport_clear_screen(sx << 3, ystart, xend, 1023,
368 (vc->vc_color & 0xf0) >> 4);
369 newport_clear_screen(sx << 3, 0, xend, yend,
370 (vc->vc_color & 0xf0) >> 4);
371 }
372 }
373
374 static void newport_putc(struct vc_data *vc, int charattr, int ypos,
375 int xpos)
376 {
377 unsigned char *p;
378
379 p = &font_data[vc->vc_num][(charattr & 0xff) << 4];
380 charattr = (charattr >> 8) & 0xff;
381 xpos <<= 3;
382 ypos <<= 4;
383
384 newport_render_background(xpos, ypos, xpos, ypos,
385 (charattr & 0xf0) >> 4);
386
387 /* Set the color and drawing mode. */
388 newport_wait(npregs);
389 npregs->set.colori = charattr & 0xf;
390 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
391 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
392 NPORT_DMODE0_L32);
393
394 /* Set coordinates for bitmap operation. */
395 npregs->set.xystarti = (xpos << 16) | ((ypos + topscan) & 0x3ff);
396 npregs->set.xyendi = ((xpos + 7) << 16);
397 newport_wait(npregs);
398
399 /* Go, baby, go... */
400 RENDER(npregs, p);
401 }
402
403 static void newport_putcs(struct vc_data *vc, const unsigned short *s,
404 int count, int ypos, int xpos)
405 {
406 int i;
407 int charattr;
408 unsigned char *p;
409
410 charattr = (scr_readw(s) >> 8) & 0xff;
411
412 xpos <<= 3;
413 ypos <<= 4;
414
415 if (!logo_active)
416 /* Clear the area behing the string */
417 newport_render_background(xpos, ypos,
418 xpos + ((count - 1) << 3), ypos,
419 (charattr & 0xf0) >> 4);
420
421 newport_wait(npregs);
422
423 /* Set the color and drawing mode. */
424 npregs->set.colori = charattr & 0xf;
425 npregs->set.drawmode0 = (NPORT_DMODE0_DRAW | NPORT_DMODE0_BLOCK |
426 NPORT_DMODE0_STOPX | NPORT_DMODE0_ZPENAB |
427 NPORT_DMODE0_L32);
428
429 for (i = 0; i < count; i++, xpos += 8) {
430 p = &font_data[vc->vc_num][(scr_readw(s++) & 0xff) << 4];
431
432 newport_wait(npregs);
433
434 /* Set coordinates for bitmap operation. */
435 npregs->set.xystarti =
436 (xpos << 16) | ((ypos + topscan) & 0x3ff);
437 npregs->set.xyendi = ((xpos + 7) << 16);
438
439 /* Go, baby, go... */
440 RENDER(npregs, p);
441 }
442 }
443
444 static void newport_cursor(struct vc_data *vc, int mode)
445 {
446 unsigned short treg;
447 int xcurs, ycurs;
448
449 switch (mode) {
450 case CM_ERASE:
451 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
452 newport_vc2_set(npregs, VC2_IREG_CONTROL,
453 (treg & ~(VC2_CTRL_ECDISP)));
454 break;
455
456 case CM_MOVE:
457 case CM_DRAW:
458 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
459 newport_vc2_set(npregs, VC2_IREG_CONTROL,
460 (treg | VC2_CTRL_ECDISP));
461 xcurs = (vc->vc_pos - vc->vc_visible_origin) / 2;
462 ycurs = ((xcurs / vc->vc_cols) << 4) + 31;
463 xcurs = ((xcurs % vc->vc_cols) << 3) + xcurs_correction;
464 newport_vc2_set(npregs, VC2_IREG_CURSX, xcurs);
465 newport_vc2_set(npregs, VC2_IREG_CURSY, ycurs);
466 }
467 }
468
469 static int newport_switch(struct vc_data *vc)
470 {
471 static int logo_drawn = 0;
472
473 topscan = 0;
474 npregs->cset.topscan = 0x3ff;
475
476 if (!logo_drawn) {
477 if (newport_show_logo()) {
478 logo_drawn = 1;
479 logo_active = 1;
480 }
481 }
482
483 return 1;
484 }
485
486 static int newport_blank(struct vc_data *c, int blank, int mode_switch)
487 {
488 unsigned short treg;
489
490 if (blank == 0) {
491 /* unblank console */
492 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
493 newport_vc2_set(npregs, VC2_IREG_CONTROL,
494 (treg | VC2_CTRL_EDISP));
495 } else {
496 /* blank console */
497 treg = newport_vc2_get(npregs, VC2_IREG_CONTROL);
498 newport_vc2_set(npregs, VC2_IREG_CONTROL,
499 (treg & ~(VC2_CTRL_EDISP)));
500 }
501 return 1;
502 }
503
504 static int newport_set_font(int unit, struct console_font *op)
505 {
506 int w = op->width;
507 int h = op->height;
508 int size = h * op->charcount;
509 int i;
510 unsigned char *new_data, *data = op->data, *p;
511
512 /* ladis: when I grow up, there will be a day... and more sizes will
513 * be supported ;-) */
514 if ((w != 8) || (h != 16)
515 || (op->charcount != 256 && op->charcount != 512))
516 return -EINVAL;
517
518 if (!(new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size,
519 GFP_USER))) return -ENOMEM;
520
521 new_data += FONT_EXTRA_WORDS * sizeof(int);
522 FNTSIZE(new_data) = size;
523 FNTCHARCNT(new_data) = op->charcount;
524 REFCOUNT(new_data) = 0; /* usage counter */
525
526 p = new_data;
527 for (i = 0; i < op->charcount; i++) {
528 memcpy(p, data, h);
529 data += 32;
530 p += h;
531 }
532
533 /* check if font is already used by other console */
534 for (i = 0; i < MAX_NR_CONSOLES; i++) {
535 if (font_data[i] != FONT_DATA
536 && FNTSIZE(font_data[i]) == size
537 && !memcmp(font_data[i], new_data, size)) {
538 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
539 /* current font is the same as the new one */
540 if (i == unit)
541 return 0;
542 new_data = font_data[i];
543 break;
544 }
545 }
546 /* old font is user font */
547 if (font_data[unit] != FONT_DATA) {
548 if (--REFCOUNT(font_data[unit]) == 0)
549 kfree(font_data[unit] -
550 FONT_EXTRA_WORDS * sizeof(int));
551 }
552 REFCOUNT(new_data)++;
553 font_data[unit] = new_data;
554
555 return 0;
556 }
557
558 static int newport_set_def_font(int unit, struct console_font *op)
559 {
560 if (font_data[unit] != FONT_DATA) {
561 if (--REFCOUNT(font_data[unit]) == 0)
562 kfree(font_data[unit] -
563 FONT_EXTRA_WORDS * sizeof(int));
564 font_data[unit] = FONT_DATA;
565 }
566
567 return 0;
568 }
569
570 static int newport_font_default(struct vc_data *vc, struct console_font *op, char *name)
571 {
572 return newport_set_def_font(vc->vc_num, op);
573 }
574
575 static int newport_font_set(struct vc_data *vc, struct console_font *font, unsigned flags)
576 {
577 return newport_set_font(vc->vc_num, font);
578 }
579
580 static bool newport_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
581 enum con_scroll dir, unsigned int lines)
582 {
583 int count, x, y;
584 unsigned short *s, *d;
585 unsigned short chattr;
586
587 logo_active = 0; /* it's time to disable the logo now.. */
588
589 if (t == 0 && b == vc->vc_rows) {
590 if (dir == SM_UP) {
591 topscan = (topscan + (lines << 4)) & 0x3ff;
592 newport_clear_lines(vc->vc_rows - lines,
593 vc->vc_rows - 1,
594 (vc->vc_color & 0xf0) >> 4);
595 } else {
596 topscan = (topscan + (-lines << 4)) & 0x3ff;
597 newport_clear_lines(0, lines - 1,
598 (vc->vc_color & 0xf0) >> 4);
599 }
600 npregs->cset.topscan = (topscan - 1) & 0x3ff;
601 return false;
602 }
603
604 count = (b - t - lines) * vc->vc_cols;
605 if (dir == SM_UP) {
606 x = 0;
607 y = t;
608 s = (unsigned short *) (vc->vc_origin +
609 vc->vc_size_row * (t + lines));
610 d = (unsigned short *) (vc->vc_origin +
611 vc->vc_size_row * t);
612 while (count--) {
613 chattr = scr_readw(s++);
614 if (chattr != scr_readw(d)) {
615 newport_putc(vc, chattr, y, x);
616 scr_writew(chattr, d);
617 }
618 d++;
619 if (++x == vc->vc_cols) {
620 x = 0;
621 y++;
622 }
623 }
624 d = (unsigned short *) (vc->vc_origin +
625 vc->vc_size_row * (b - lines));
626 x = 0;
627 y = b - lines;
628 for (count = 0; count < (lines * vc->vc_cols); count++) {
629 if (scr_readw(d) != vc->vc_video_erase_char) {
630 newport_putc(vc, vc->vc_video_erase_char,
631 y, x);
632 scr_writew(vc->vc_video_erase_char, d);
633 }
634 d++;
635 if (++x == vc->vc_cols) {
636 x = 0;
637 y++;
638 }
639 }
640 } else {
641 x = vc->vc_cols - 1;
642 y = b - 1;
643 s = (unsigned short *) (vc->vc_origin +
644 vc->vc_size_row * (b - lines) - 2);
645 d = (unsigned short *) (vc->vc_origin +
646 vc->vc_size_row * b - 2);
647 while (count--) {
648 chattr = scr_readw(s--);
649 if (chattr != scr_readw(d)) {
650 newport_putc(vc, chattr, y, x);
651 scr_writew(chattr, d);
652 }
653 d--;
654 if (x-- == 0) {
655 x = vc->vc_cols - 1;
656 y--;
657 }
658 }
659 d = (unsigned short *) (vc->vc_origin +
660 vc->vc_size_row * t);
661 x = 0;
662 y = t;
663 for (count = 0; count < (lines * vc->vc_cols); count++) {
664 if (scr_readw(d) != vc->vc_video_erase_char) {
665 newport_putc(vc, vc->vc_video_erase_char,
666 y, x);
667 scr_writew(vc->vc_video_erase_char, d);
668 }
669 d++;
670 if (++x == vc->vc_cols) {
671 x = 0;
672 y++;
673 }
674 }
675 }
676 return true;
677 }
678
679 static int newport_set_origin(struct vc_data *vc)
680 {
681 return 0;
682 }
683
684 static void newport_save_screen(struct vc_data *vc) { }
685
686 const struct consw newport_con = {
687 .owner = THIS_MODULE,
688 .con_startup = newport_startup,
689 .con_init = newport_init,
690 .con_deinit = newport_deinit,
691 .con_clear = newport_clear,
692 .con_putc = newport_putc,
693 .con_putcs = newport_putcs,
694 .con_cursor = newport_cursor,
695 .con_scroll = newport_scroll,
696 .con_switch = newport_switch,
697 .con_blank = newport_blank,
698 .con_font_set = newport_font_set,
699 .con_font_default = newport_font_default,
700 .con_set_origin = newport_set_origin,
701 .con_save_screen = newport_save_screen
702 };
703
704 static int newport_probe(struct gio_device *dev,
705 const struct gio_device_id *id)
706 {
707 int err;
708
709 if (!dev->resource.start)
710 return -EINVAL;
711
712 if (npregs)
713 return -EBUSY; /* we only support one Newport as console */
714
715 newport_addr = dev->resource.start + 0xF0000;
716 if (!request_mem_region(newport_addr, NEWPORT_LEN, "Newport"))
717 return -ENODEV;
718
719 npregs = (struct newport_regs *)/* ioremap cannot fail */
720 ioremap(newport_addr, sizeof(struct newport_regs));
721 console_lock();
722 err = do_take_over_console(&newport_con, 0, MAX_NR_CONSOLES - 1, 1);
723 console_unlock();
724
725 if (err) {
726 iounmap((void *)npregs);
727 release_mem_region(newport_addr, NEWPORT_LEN);
728 }
729 return err;
730 }
731
732 static void newport_remove(struct gio_device *dev)
733 {
734 give_up_console(&newport_con);
735 iounmap((void *)npregs);
736 release_mem_region(newport_addr, NEWPORT_LEN);
737 }
738
739 static struct gio_device_id newport_ids[] = {
740 { .id = 0x7e },
741 { .id = 0xff }
742 };
743
744 MODULE_ALIAS("gio:7e");
745
746 static struct gio_driver newport_driver = {
747 .name = "newport",
748 .id_table = newport_ids,
749 .probe = newport_probe,
750 .remove = newport_remove,
751 };
752
753 int __init newport_console_init(void)
754 {
755 return gio_register_driver(&newport_driver);
756 }
757
758 void __exit newport_console_exit(void)
759 {
760 gio_unregister_driver(&newport_driver);
761 }
762
763 module_init(newport_console_init);
764 module_exit(newport_console_exit);
765
766 MODULE_LICENSE("GPL");
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