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[PATCH] update copyright and licensing
[linux-2.6/history.git] / drivers / video / fbmem.c
bloba89dbc7e59edbebe2493f8419cf2d41f7536fbea
1 /*
2 * linux/drivers/video/fbmem.c
3 *
4 * Copyright (C) 1994 Martin Schaller
5 *
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
11 * for more details.
12 */
13
14 #include <linux/config.h>
15 #include <linux/module.h>
16
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/smp_lock.h>
21 #include <linux/kernel.h>
22 #include <linux/major.h>
23 #include <linux/slab.h>
24 #include <linux/mm.h>
25 #include <linux/mman.h>
26 #include <linux/tty.h>
27 #include <linux/init.h>
28 #include <linux/linux_logo.h>
29 #include <linux/proc_fs.h>
30 #ifdef CONFIG_KMOD
31 #include <linux/kmod.h>
32 #endif
33 #include <linux/devfs_fs_kernel.h>
34
35 #if defined(__mc68000__) || defined(CONFIG_APUS)
36 #include <asm/setup.h>
37 #endif
38
39 #include <asm/io.h>
40 #include <asm/uaccess.h>
41 #include <asm/page.h>
42 #include <asm/pgtable.h>
43
44 #include <linux/fb.h>
45
46 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
47 #include "console/fbcon.h"
48 #endif
49 /*
50 * Frame buffer device initialization and setup routines
51 */
52
53 extern int acornfb_init(void);
54 extern int acornfb_setup(char*);
55 extern int amifb_init(void);
56 extern int amifb_setup(char*);
57 extern int anakinfb_init(void);
58 extern int atafb_init(void);
59 extern int atafb_setup(char*);
60 extern int macfb_init(void);
61 extern int macfb_setup(char*);
62 extern int cyberfb_init(void);
63 extern int cyberfb_setup(char*);
64 extern int pm2fb_init(void);
65 extern int pm2fb_setup(char*);
66 extern int pm3fb_init(void);
67 extern int pm3fb_setup(char*);
68 extern int clps711xfb_init(void);
69 extern int cyber2000fb_init(void);
70 extern int cyber2000fb_setup(char*);
71 extern int retz3fb_init(void);
72 extern int retz3fb_setup(char*);
73 extern int clgenfb_init(void);
74 extern int clgenfb_setup(char*);
75 extern int hitfb_init(void);
76 extern int vfb_init(void);
77 extern int vfb_setup(char*);
78 extern int offb_init(void);
79 extern int atyfb_init(void);
80 extern int atyfb_setup(char*);
81 extern int aty128fb_init(void);
82 extern int aty128fb_setup(char*);
83 extern int neofb_init(void);
84 extern int neofb_setup(char*);
85 extern int igafb_init(void);
86 extern int igafb_setup(char*);
87 extern int imsttfb_init(void);
88 extern int imsttfb_setup(char*);
89 extern int dnfb_init(void);
90 extern int tgafb_init(void);
91 extern int tgafb_setup(char*);
92 extern int virgefb_init(void);
93 extern int virgefb_setup(char*);
94 extern int resolver_video_setup(char*);
95 extern int s3triofb_init(void);
96 extern int vesafb_init(void);
97 extern int vesafb_setup(char*);
98 extern int vga16fb_init(void);
99 extern int vga16fb_setup(char*);
100 extern int hgafb_init(void);
101 extern int hgafb_setup(char*);
102 extern int matroxfb_init(void);
103 extern int matroxfb_setup(char*);
104 extern int hpfb_init(void);
105 extern int control_init(void);
106 extern int control_setup(char*);
107 extern int platinum_init(void);
108 extern int platinum_setup(char*);
109 extern int valkyriefb_init(void);
110 extern int valkyriefb_setup(char*);
111 extern int chips_init(void);
112 extern int g364fb_init(void);
113 extern int sa1100fb_init(void);
114 extern int fm2fb_init(void);
115 extern int fm2fb_setup(char*);
116 extern int q40fb_init(void);
117 extern int sun3fb_init(void);
118 extern int sun3fb_setup(char *);
119 extern int sgivwfb_init(void);
120 extern int sgivwfb_setup(char*);
121 extern int rivafb_init(void);
122 extern int rivafb_setup(char*);
123 extern int tdfxfb_init(void);
124 extern int tdfxfb_setup(char*);
125 extern int tridentfb_init(void);
126 extern int tridentfb_setup(char*);
127 extern int sisfb_init(void);
128 extern int sisfb_setup(char*);
129 extern int stifb_init(void);
130 extern int stifb_setup(char*);
131 extern int pmagbafb_init(void);
132 extern int pmagbbfb_init(void);
133 extern int maxinefb_init(void);
134 extern int tx3912fb_init(void);
135 extern int tx3912fb_setup(char*);
136 extern int radeonfb_init(void);
137 extern int radeonfb_setup(char*);
138 extern int e1355fb_init(void);
139 extern int e1355fb_setup(char*);
140 extern int pvr2fb_init(void);
141 extern int pvr2fb_setup(char*);
142 extern int sstfb_init(void);
143 extern int sstfb_setup(char*);
144 extern int i810fb_init(void);
145 extern int i810fb_setup(char*);
146 extern int ffb_init(void);
147 extern int ffb_setup(char*);
148 extern int cg6_init(void);
149 extern int cg6_setup(char*);
150 extern int cg3_init(void);
151 extern int cg3_setup(char*);
152 extern int bw2_init(void);
153 extern int bw2_setup(char*);
154 extern int cg14_init(void);
155 extern int cg14_setup(char*);
156 extern int p9100_init(void);
157 extern int p9100_setup(char*);
158 extern int tcx_init(void);
159 extern int tcx_setup(char*);
160 extern int leo_init(void);
161 extern int leo_setup(char*);
162
163 static struct {
164 const char *name;
165 int (*init)(void);
166 int (*setup)(char*);
167 } fb_drivers[] __initdata = {
168
169 /*
170 * Chipset specific drivers that use resource management
171 */
172 #ifdef CONFIG_FB_RETINAZ3
173 { "retz3fb", retz3fb_init, retz3fb_setup },
174 #endif
175 #ifdef CONFIG_FB_AMIGA
176 { "amifb", amifb_init, amifb_setup },
177 #endif
178 #ifdef CONFIG_FB_ANAKIN
179 { "anakinfb", anakinfb_init, NULL },
180 #endif
181 #ifdef CONFIG_FB_CLPS711X
182 { "clps711xfb", clps711xfb_init, NULL },
183 #endif
184 #ifdef CONFIG_FB_CYBER
185 { "cyberfb", cyberfb_init, cyberfb_setup },
186 #endif
187 #ifdef CONFIG_FB_CYBER2000
188 { "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
189 #endif
190 #ifdef CONFIG_FB_PM2
191 { "pm2fb", pm2fb_init, pm2fb_setup },
192 #endif
193 #ifdef CONFIG_FB_PM3
194 { "pm3fb", pm3fb_init, pm3fb_setup },
195 #endif
196 #ifdef CONFIG_FB_CLGEN
197 { "clgenfb", clgenfb_init, clgenfb_setup },
198 #endif
199 #ifdef CONFIG_FB_ATY
200 { "atyfb", atyfb_init, atyfb_setup },
201 #endif
202 #ifdef CONFIG_FB_MATROX
203 { "matroxfb", matroxfb_init, matroxfb_setup },
204 #endif
205 #ifdef CONFIG_FB_ATY128
206 { "aty128fb", aty128fb_init, aty128fb_setup },
207 #endif
208 #ifdef CONFIG_FB_NEOMAGIC
209 { "neofb", neofb_init, neofb_setup },
210 #endif
211 #ifdef CONFIG_FB_VIRGE
212 { "virgefb", virgefb_init, virgefb_setup },
213 #endif
214 #ifdef CONFIG_FB_RIVA
215 { "rivafb", rivafb_init, rivafb_setup },
216 #endif
217 #ifdef CONFIG_FB_3DFX
218 { "tdfxfb", tdfxfb_init, tdfxfb_setup },
219 #endif
220 #ifdef CONFIG_FB_RADEON
221 { "radeonfb", radeonfb_init, radeonfb_setup },
222 #endif
223 #ifdef CONFIG_FB_CONTROL
224 { "controlfb", control_init, control_setup },
225 #endif
226 #ifdef CONFIG_FB_PLATINUM
227 { "platinumfb", platinum_init, platinum_setup },
228 #endif
229 #ifdef CONFIG_FB_VALKYRIE
230 { "valkyriefb", valkyriefb_init, valkyriefb_setup },
231 #endif
232 #ifdef CONFIG_FB_CT65550
233 { "chipsfb", chips_init, NULL },
234 #endif
235 #ifdef CONFIG_FB_IMSTT
236 { "imsttfb", imsttfb_init, imsttfb_setup },
237 #endif
238 #ifdef CONFIG_FB_S3TRIO
239 { "s3triofb", s3triofb_init, NULL },
240 #endif
241 #ifdef CONFIG_FB_FM2
242 { "fm2fb", fm2fb_init, fm2fb_setup },
243 #endif
244 #ifdef CONFIG_FB_SIS
245 { "sisfb", sisfb_init, sisfb_setup },
246 #endif
247 #ifdef CONFIG_FB_TRIDENT
248 { "tridentfb", tridentfb_init, tridentfb_setup },
249 #endif
250 #ifdef CONFIG_FB_I810
251 { "i810fb", i810fb_init, i810fb_setup },
252 #endif
253 #ifdef CONFIG_FB_STI
254 { "stifb", stifb_init, stifb_setup },
255 #endif
256 #ifdef CONFIG_FB_FFB
257 { "ffb", ffb_init, ffb_setup },
258 #endif
259 #ifdef CONFIG_FB_CG6
260 { "cg6fb", cg6_init, cg6_setup },
261 #endif
262 #ifdef CONFIG_FB_CG3
263 { "cg3fb", cg3_init, cg3_setup },
264 #endif
265 #ifdef CONFIG_FB_BW2
266 { "bw2fb", bw2_init, bw2_setup },
267 #endif
268 #ifdef CONFIG_FB_CG14
269 { "cg14fb", cg14_init, cg14_setup },
270 #endif
271 #ifdef CONFIG_FB_P9100
272 { "p9100fb", p9100_init, p9100_setup },
273 #endif
274 #ifdef CONFIG_FB_TCX
275 { "tcxfb", tcx_init, tcx_setup },
276 #endif
277 #ifdef CONFIG_FB_LEO
278 { "leofb", leo_init, leo_setup },
279 #endif
280
281 /*
282 * Generic drivers that are used as fallbacks
283 *
284 * These depend on resource management and must be initialized
285 * _after_ all other frame buffer devices that use resource
286 * management!
287 */
288
289 #ifdef CONFIG_FB_OF
290 { "offb", offb_init, NULL },
291 #endif
292 #ifdef CONFIG_FB_VESA
293 { "vesafb", vesafb_init, vesafb_setup },
294 #endif
295
296 /*
297 * Chipset specific drivers that don't use resource management (yet)
298 */
299
300 #ifdef CONFIG_FB_SGIVW
301 { "sgivwfb", sgivwfb_init, sgivwfb_setup },
302 #endif
303 #ifdef CONFIG_FB_ACORN
304 { "acornfb", acornfb_init, acornfb_setup },
305 #endif
306 #ifdef CONFIG_FB_ATARI
307 { "atafb", atafb_init, atafb_setup },
308 #endif
309 #ifdef CONFIG_FB_MAC
310 { "macfb", macfb_init, macfb_setup },
311 #endif
312 #ifdef CONFIG_FB_HGA
313 { "hgafb", hgafb_init, hgafb_setup },
314 #endif
315 #ifdef CONFIG_FB_IGA
316 { "igafb", igafb_init, igafb_setup },
317 #endif
318 #ifdef CONFIG_APOLLO
319 { "apollofb", dnfb_init, NULL },
320 #endif
321 #ifdef CONFIG_FB_Q40
322 { "q40fb", q40fb_init, NULL },
323 #endif
324 #ifdef CONFIG_FB_TGA
325 { "tgafb", tgafb_init, tgafb_setup },
326 #endif
327 #ifdef CONFIG_FB_HP300
328 { "hpfb", hpfb_init, NULL },
329 #endif
330 #ifdef CONFIG_FB_G364
331 { "g364fb", g364fb_init, NULL },
332 #endif
333 #ifdef CONFIG_FB_SA1100
334 { "sa1100fb", sa1100fb_init, NULL },
335 #endif
336 #ifdef CONFIG_FB_SUN3
337 { "sun3fb", sun3fb_init, sun3fb_setup },
338 #endif
339 #ifdef CONFIG_FB_HIT
340 { "hitfb", hitfb_init, NULL },
341 #endif
342 #ifdef CONFIG_FB_TX3912
343 { "tx3912fb", tx3912fb_init, tx3912fb_setup },
344 #endif
345 #ifdef CONFIG_FB_E1355
346 { "e1355fb", e1355fb_init, e1355fb_setup },
347 #endif
348 #ifdef CONFIG_FB_PVR2
349 { "pvr2fb", pvr2fb_init, pvr2fb_setup },
350 #endif
351 #ifdef CONFIG_FB_PMAG_BA
352 { "pmagbafb", pmagbafb_init, NULL },
353 #endif
354 #ifdef CONFIG_FB_PMAGB_B
355 { "pmagbbfb", pmagbbfb_init, NULL },
356 #endif
357 #ifdef CONFIG_FB_MAXINE
358 { "maxinefb", maxinefb_init, NULL },
359 #endif
360 #ifdef CONFIG_FB_VOODOO1
361 { "sstfb", sstfb_init, sstfb_setup },
362 #endif
363 /*
364 * Generic drivers that don't use resource management (yet)
365 */
366
367 #ifdef CONFIG_FB_VGA16
368 { "vga16fb", vga16fb_init, vga16fb_setup },
369 #endif
370
371 #ifdef CONFIG_GSP_RESOLVER
372 /* Not a real frame buffer device... */
373 { "resolverfb", NULL, resolver_video_setup },
374 #endif
375
376 #ifdef CONFIG_FB_VIRTUAL
377 /*
378 * Vfb must be last to avoid that it becomes your primary display if
379 * other display devices are present
380 */
381 { "vfb", vfb_init, vfb_setup },
382 #endif
383 };
384
385 #define NUM_FB_DRIVERS (sizeof(fb_drivers)/sizeof(*fb_drivers))
386 #define FBPIXMAPSIZE 8192
387
388 extern const char *global_mode_option;
389
390 static initcall_t pref_init_funcs[FB_MAX];
391 static int num_pref_init_funcs __initdata = 0;
392 struct fb_info *registered_fb[FB_MAX];
393 int num_registered_fb;
394
395 #ifdef CONFIG_FB_OF
396 static int ofonly __initdata = 0;
397 #endif
398
399 /*
400 * Drawing helpers.
401 */
402 u8 sys_inbuf(u8 *src)
403 {
404 return *src;
405 }
406
407 void sys_outbuf(u8 *src, u8 *dst, unsigned int size)
408 {
409 memcpy(dst, src, size);
410 }
411
412 void move_buf_aligned(struct fb_info *info, u8 *dst, u8 *src, u32 d_pitch,
413 u32 s_pitch, u32 height)
414 {
415 int i;
416
417 for (i = height; i--; ) {
418 info->pixmap.outbuf(src, dst, s_pitch);
419 src += s_pitch;
420 dst += d_pitch;
421 }
422 }
423
424 void move_buf_unaligned(struct fb_info *info, u8 *dst, u8 *src, u32 d_pitch,
425 u32 height, u32 mask, u32 shift_high, u32 shift_low,
426 u32 mod, u32 idx)
427 {
428 int i, j;
429 u8 tmp;
430
431 for (i = height; i--; ) {
432 for (j = 0; j < idx; j++) {
433 tmp = info->pixmap.inbuf(dst+j);
434 tmp &= mask;
435 tmp |= *src >> shift_low;
436 info->pixmap.outbuf(&tmp, dst+j, 1);
437 tmp = *src << shift_high;
438 info->pixmap.outbuf(&tmp, dst+j+1, 1);
439 src++;
440 }
441 tmp = info->pixmap.inbuf(dst+idx);
442 tmp &= mask;
443 tmp |= *src >> shift_low;
444 info->pixmap.outbuf(&tmp, dst+idx, 1);
445 if (shift_high < mod) {
446 tmp = *src << shift_high;
447 info->pixmap.outbuf(&tmp, dst+idx+1, 1);
448 }
449 src++;
450 dst += d_pitch;
451 }
452 }
453
454 /*
455 * we need to lock this section since fb_cursor
456 * may use fb_imageblit()
457 */
458 u32 fb_get_buffer_offset(struct fb_info *info, u32 size)
459 {
460 u32 align = info->pixmap.buf_align - 1;
461 u32 offset, count = 1000;
462
463 spin_lock(&info->pixmap.lock);
464 offset = info->pixmap.offset + align;
465 offset &= ~align;
466 if (offset + size > info->pixmap.size) {
467 while (atomic_read(&info->pixmap.count) && count--);
468 if (info->fbops->fb_sync &&
469 info->pixmap.flags & FB_PIXMAP_SYNC)
470 info->fbops->fb_sync(info);
471 offset = 0;
472 }
473 info->pixmap.offset = offset + size;
474 atomic_inc(&info->pixmap.count);
475 smp_mb__after_atomic_inc();
476 spin_unlock(&info->pixmap.lock);
477 return offset;
478 }
479
480 #ifdef CONFIG_LOGO
481 #include <linux/linux_logo.h>
482
483 static inline unsigned safe_shift(unsigned d, int n)
484 {
485 return n < 0 ? d >> -n : d << n;
486 }
487
488 static void __init fb_set_logocmap(struct fb_info *info,
489 const struct linux_logo *logo)
490 {
491 struct fb_cmap palette_cmap;
492 u16 palette_green[16];
493 u16 palette_blue[16];
494 u16 palette_red[16];
495 int i, j, n;
496 const unsigned char *clut = logo->clut;
497
498 palette_cmap.start = 0;
499 palette_cmap.len = 16;
500 palette_cmap.red = palette_red;
501 palette_cmap.green = palette_green;
502 palette_cmap.blue = palette_blue;
503 palette_cmap.transp = NULL;
504
505 for (i = 0; i < logo->clutsize; i += n) {
506 n = logo->clutsize - i;
507 /* palette_cmap provides space for only 16 colors at once */
508 if (n > 16)
509 n = 16;
510 palette_cmap.start = 32 + i;
511 palette_cmap.len = n;
512 for (j = 0; j < n; ++j) {
513 palette_cmap.red[j] = clut[0] << 8 | clut[0];
514 palette_cmap.green[j] = clut[1] << 8 | clut[1];
515 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
516 clut += 3;
517 }
518 fb_set_cmap(&palette_cmap, 1, info);
519 }
520 }
521
522 static void __init fb_set_logo_truepalette(struct fb_info *info,
523 const struct linux_logo *logo,
524 u32 *palette)
525 {
526 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
527 unsigned char redmask, greenmask, bluemask;
528 int redshift, greenshift, blueshift;
529 int i;
530 const unsigned char *clut = logo->clut;
531
532 /*
533 * We have to create a temporary palette since console palette is only
534 * 16 colors long.
535 */
536 /* Bug: Doesn't obey msb_right ... (who needs that?) */
537 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
538 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
539 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
540 redshift = info->var.red.offset - (8 - info->var.red.length);
541 greenshift = info->var.green.offset - (8 - info->var.green.length);
542 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
543
544 for ( i = 0; i < logo->clutsize; i++) {
545 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
546 safe_shift((clut[1] & greenmask), greenshift) |
547 safe_shift((clut[2] & bluemask), blueshift));
548 clut += 3;
549 }
550 }
551
552 static void __init fb_set_logo_directpalette(struct fb_info *info,
553 const struct linux_logo *logo,
554 u32 *palette)
555 {
556 int redshift, greenshift, blueshift;
557 int i;
558
559 redshift = info->var.red.offset;
560 greenshift = info->var.green.offset;
561 blueshift = info->var.blue.offset;
562
563 for (i = 32; i < logo->clutsize; i++)
564 palette[i] = i << redshift | i << greenshift | i << blueshift;
565 }
566
567 static void __init fb_set_logo(struct fb_info *info,
568 const struct linux_logo *logo, u8 *dst,
569 int depth)
570 {
571 int i, j, shift;
572 const u8 *src = logo->data;
573 u8 d, xor = 0;
574
575 switch (depth) {
576 case 4:
577 for (i = 0; i < logo->height; i++)
578 for (j = 0; j < logo->width; src++) {
579 *dst++ = *src >> 4;
580 j++;
581 if (j < logo->width) {
582 *dst++ = *src & 0x0f;
583 j++;
584 }
585 }
586 break;
587 case ~1:
588 xor = 0xff;
589 case 1:
590 for (i = 0; i < logo->height; i++) {
591 shift = 7;
592 d = *src++ ^ xor;
593 for (j = 0; j < logo->width; j++) {
594 *dst++ = (d >> shift) & 1;
595 shift = (shift-1) & 7;
596 if (shift == 7)
597 d = *src++ ^ xor;
598 }
599 }
600 break;
601 }
602 }
603
604 /*
605 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
606 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
607 * the visual format and color depth of the framebuffer, the DAC, the
608 * pseudo_palette, and the logo data will be adjusted accordingly.
609 *
610 * Case 1 - linux_logo_clut224:
611 * Color exceeds the number of console colors (16), thus we set the hardware DAC
612 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
613 *
614 * For visuals that require color info from the pseudo_palette, we also construct
615 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
616 * will be set.
617 *
618 * Case 2 - linux_logo_vga16:
619 * The number of colors just matches the console colors, thus there is no need
620 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
621 * each byte contains color information for two pixels (upper and lower nibble).
622 * To be consistent with fb_imageblit() usage, we therefore separate the two
623 * nibbles into separate bytes. The "depth" flag will be set to 4.
624 *
625 * Case 3 - linux_logo_mono:
626 * This is similar with Case 2. Each byte contains information for 8 pixels.
627 * We isolate each bit and expand each into a byte. The "depth" flag will
628 * be set to 1.
629 */
630 static struct logo_data {
631 int depth;
632 int needs_directpalette;
633 int needs_truepalette;
634 int needs_cmapreset;
635 const struct linux_logo *logo;
636 } fb_logo;
637
638 int fb_prepare_logo(struct fb_info *info)
639 {
640 memset(&fb_logo, 0, sizeof(struct logo_data));
641
642 switch (info->fix.visual) {
643 case FB_VISUAL_TRUECOLOR:
644 if (info->var.bits_per_pixel >= 8)
645 fb_logo.needs_truepalette = 1;
646 break;
647 case FB_VISUAL_DIRECTCOLOR:
648 if (info->var.bits_per_pixel >= 24) {
649 fb_logo.needs_directpalette = 1;
650 fb_logo.needs_cmapreset = 1;
651 }
652 break;
653 case FB_VISUAL_PSEUDOCOLOR:
654 fb_logo.needs_cmapreset = 1;
655 break;
656 }
657
658 /* Return if no suitable logo was found */
659 fb_logo.logo = fb_find_logo(info->var.bits_per_pixel);
660
661 if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
662 fb_logo.logo = NULL;
663 return 0;
664 }
665 /* What depth we asked for might be different from what we get */
666 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
667 fb_logo.depth = 8;
668 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
669 fb_logo.depth = 4;
670 else
671 fb_logo.depth = 1;
672 return fb_logo.logo->height;
673 }
674
675 int fb_show_logo(struct fb_info *info)
676 {
677 u32 *palette = NULL, *saved_pseudo_palette = NULL;
678 unsigned char *logo_new = NULL;
679 struct fb_image image;
680 int x;
681
682 /* Return if the frame buffer is not mapped */
683 if (fb_logo.logo == NULL)
684 return 0;
685
686 image.depth = fb_logo.depth;
687 image.data = fb_logo.logo->data;
688
689 if (fb_logo.needs_cmapreset)
690 fb_set_logocmap(info, fb_logo.logo);
691
692 if (fb_logo.needs_truepalette ||
693 fb_logo.needs_directpalette) {
694 palette = kmalloc(256 * 4, GFP_KERNEL);
695 if (palette == NULL)
696 return 0;
697
698 if (fb_logo.needs_truepalette)
699 fb_set_logo_truepalette(info, fb_logo.logo, palette);
700 else
701 fb_set_logo_directpalette(info, fb_logo.logo, palette);
702
703 saved_pseudo_palette = info->pseudo_palette;
704 info->pseudo_palette = palette;
705 }
706
707 if (fb_logo.depth == 4) {
708 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
709 GFP_KERNEL);
710 if (logo_new == NULL) {
711 if (palette)
712 kfree(palette);
713 if (saved_pseudo_palette)
714 info->pseudo_palette = saved_pseudo_palette;
715 return 0;
716 }
717 image.data = logo_new;
718 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
719 }
720
721 image.width = fb_logo.logo->width;
722 image.height = fb_logo.logo->height;
723 image.dy = 0;
724
725 for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
726 x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
727 image.dx = x;
728 info->fbops->fb_imageblit(info, &image);
729 //atomic_dec(&info->pixmap.count);
730 //smp_mb__after_atomic_dec();
731 }
732
733 if (palette != NULL)
734 kfree(palette);
735 if (saved_pseudo_palette != NULL)
736 info->pseudo_palette = saved_pseudo_palette;
737 if (logo_new != NULL)
738 kfree(logo_new);
739 return fb_logo.logo->height;
740 }
741 #else
742 int fb_prepare_logo(struct fb_info *info) { return 0; }
743 int fb_show_logo(struct fb_info *info) { return 0; }
744 #endif /* CONFIG_LOGO */
745
746 static int fbmem_read_proc(char *buf, char **start, off_t offset,
747 int len, int *eof, void *private)
748 {
749 struct fb_info **fi;
750 int clen;
751
752 clen = 0;
753 for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
754 if (*fi)
755 clen += sprintf(buf + clen, "%d %s\n",
756 (*fi)->node,
757 (*fi)->fix.id);
758 *start = buf + offset;
759 if (clen > offset)
760 clen -= offset;
761 else
762 clen = 0;
763 return clen < len ? clen : len;
764 }
765
766 static ssize_t
767 fb_read(struct file *file, char *buf, size_t count, loff_t *ppos)
768 {
769 unsigned long p = *ppos;
770 struct inode *inode = file->f_dentry->d_inode;
771 int fbidx = iminor(inode);
772 struct fb_info *info = registered_fb[fbidx];
773
774 if (!info || ! info->screen_base)
775 return -ENODEV;
776
777 if (info->fbops->fb_read)
778 return info->fbops->fb_read(file, buf, count, ppos);
779
780 if (p >= info->fix.smem_len)
781 return 0;
782 if (count >= info->fix.smem_len)
783 count = info->fix.smem_len;
784 if (count + p > info->fix.smem_len)
785 count = info->fix.smem_len - p;
786 if (info->fbops->fb_sync)
787 info->fbops->fb_sync(info);
788 if (count) {
789 char *base_addr;
790
791 base_addr = info->screen_base;
792 count -= copy_to_user(buf, base_addr+p, count);
793 if (!count)
794 return -EFAULT;
795 *ppos += count;
796 }
797 return count;
798 }
799
800 static ssize_t
801 fb_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
802 {
803 unsigned long p = *ppos;
804 struct inode *inode = file->f_dentry->d_inode;
805 int fbidx = iminor(inode);
806 struct fb_info *info = registered_fb[fbidx];
807 int err;
808
809 if (!info || !info->screen_base)
810 return -ENODEV;
811
812 if (info->fbops->fb_write)
813 return info->fbops->fb_write(file, buf, count, ppos);
814
815 if (p > info->fix.smem_len)
816 return -ENOSPC;
817 if (count >= info->fix.smem_len)
818 count = info->fix.smem_len;
819 err = 0;
820 if (count + p > info->fix.smem_len) {
821 count = info->fix.smem_len - p;
822 err = -ENOSPC;
823 }
824 if (info->fbops->fb_sync)
825 info->fbops->fb_sync(info);
826 if (count) {
827 char *base_addr;
828
829 base_addr = info->screen_base;
830 count -= copy_from_user(base_addr+p, buf, count);
831 *ppos += count;
832 err = -EFAULT;
833 }
834 if (count)
835 return count;
836 return err;
837 }
838
839 #ifdef CONFIG_KMOD
840 static void try_to_load(int fb)
841 {
842 request_module("fb%d", fb);
843 }
844 #endif /* CONFIG_KMOD */
845
846 int
847 fb_cursor(struct fb_info *info, struct fb_cursor *sprite)
848 {
849 struct fb_cursor cursor;
850 int err;
851
852 if (copy_from_user(&cursor, sprite, sizeof(struct fb_cursor)))
853 return -EFAULT;
854
855 if (cursor.set & FB_CUR_SETCUR)
856 info->cursor.enable = 1;
857
858 if (cursor.set & FB_CUR_SETCMAP) {
859 err = fb_copy_cmap(&cursor.image.cmap, &sprite->image.cmap, 1);
860 if (err)
861 return err;
862 }
863
864 if (cursor.set & FB_CUR_SETSHAPE) {
865 int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;
866 if ((cursor.image.height != info->cursor.image.height) ||
867 (cursor.image.width != info->cursor.image.width))
868 cursor.set |= FB_CUR_SETSIZE;
869
870 cursor.image.data = kmalloc(size, GFP_KERNEL);
871 if (!cursor.image.data)
872 return -ENOMEM;
873
874 cursor.mask = kmalloc(size, GFP_KERNEL);
875 if (!cursor.mask) {
876 kfree(cursor.image.data);
877 return -ENOMEM;
878 }
879
880 if (copy_from_user(&cursor.image.data, sprite->image.data, size) ||
881 copy_from_user(cursor.mask, sprite->mask, size)) {
882 kfree(cursor.image.data);
883 kfree(cursor.mask);
884 return -EFAULT;
885 }
886 }
887 info->cursor.set = cursor.set;
888 info->cursor.rop = cursor.rop;
889 err = info->fbops->fb_cursor(info, &cursor);
890 return err;
891 }
892
893 int
894 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
895 {
896 int xoffset = var->xoffset;
897 int yoffset = var->yoffset;
898 int err;
899
900 if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
901 xoffset + info->var.xres > info->var.xres_virtual ||
902 yoffset + info->var.yres > info->var.yres_virtual)
903 return -EINVAL;
904 if ((err = info->fbops->fb_pan_display(var, info)))
905 return err;
906 info->var.xoffset = var->xoffset;
907 info->var.yoffset = var->yoffset;
908 if (var->vmode & FB_VMODE_YWRAP)
909 info->var.vmode |= FB_VMODE_YWRAP;
910 else
911 info->var.vmode &= ~FB_VMODE_YWRAP;
912 return 0;
913 }
914
915 int
916 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
917 {
918 int err;
919
920 if (memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
921 if (!info->fbops->fb_check_var) {
922 *var = info->var;
923 return 0;
924 }
925
926 if ((err = info->fbops->fb_check_var(var, info)))
927 return err;
928
929 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
930 info->var = *var;
931
932 if (info->fbops->fb_set_par)
933 info->fbops->fb_set_par(info);
934
935 fb_pan_display(info, &info->var);
936
937 fb_set_cmap(&info->cmap, 1, info);
938 }
939 }
940 return 0;
941 }
942
943 int
944 fb_blank(struct fb_info *info, int blank)
945 {
946 /* ??? Variable sized stack allocation. */
947 u16 black[info->cmap.len];
948 struct fb_cmap cmap;
949
950 if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
951 return 0;
952 if (blank) {
953 memset(black, 0, info->cmap.len * sizeof(u16));
954 cmap.red = cmap.green = cmap.blue = black;
955 cmap.transp = info->cmap.transp ? black : NULL;
956 cmap.start = info->cmap.start;
957 cmap.len = info->cmap.len;
958 } else
959 cmap = info->cmap;
960 return fb_set_cmap(&cmap, 1, info);
961 }
962
963 static int
964 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
965 unsigned long arg)
966 {
967 int fbidx = iminor(inode);
968 struct fb_info *info = registered_fb[fbidx];
969 struct fb_ops *fb = info->fbops;
970 struct fb_var_screeninfo var;
971 struct fb_fix_screeninfo fix;
972 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
973 struct fb_con2fbmap con2fb;
974 #endif
975 struct fb_cmap cmap;
976 int i;
977
978 if (!fb)
979 return -ENODEV;
980 switch (cmd) {
981 case FBIOGET_VSCREENINFO:
982 return copy_to_user((void *) arg, &info->var,
983 sizeof(var)) ? -EFAULT : 0;
984 case FBIOPUT_VSCREENINFO:
985 if (copy_from_user(&var, (void *) arg, sizeof(var)))
986 return -EFAULT;
987 i = fb_set_var(info, &var);
988 if (i) return i;
989 if (copy_to_user((void *) arg, &var, sizeof(var)))
990 return -EFAULT;
991 return 0;
992 case FBIOGET_FSCREENINFO:
993 return copy_to_user((void *) arg, &info->fix,
994 sizeof(fix)) ? -EFAULT : 0;
995 case FBIOPUTCMAP:
996 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
997 return -EFAULT;
998 return (fb_set_cmap(&cmap, 0, info));
999 case FBIOGETCMAP:
1000 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1001 return -EFAULT;
1002 return (fb_copy_cmap(&info->cmap, &cmap, 0));
1003 case FBIOPAN_DISPLAY:
1004 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1005 return -EFAULT;
1006 if ((i = fb_pan_display(info, &var)))
1007 return i;
1008 if (copy_to_user((void *) arg, &var, sizeof(var)))
1009 return -EFAULT;
1010 return 0;
1011 case FBIO_CURSOR:
1012 return (fb_cursor(info, (struct fb_cursor *) arg));
1013 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1014 case FBIOGET_CON2FBMAP:
1015 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1016 return -EFAULT;
1017 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1018 return -EINVAL;
1019 con2fb.framebuffer = con2fb_map[con2fb.console-1];
1020 return copy_to_user((void *)arg, &con2fb,
1021 sizeof(con2fb)) ? -EFAULT : 0;
1022 case FBIOPUT_CON2FBMAP:
1023 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1024 return - EFAULT;
1025 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
1026 return -EINVAL;
1027 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1028 return -EINVAL;
1029 #ifdef CONFIG_KMOD
1030 if (!registered_fb[con2fb.framebuffer])
1031 try_to_load(con2fb.framebuffer);
1032 #endif /* CONFIG_KMOD */
1033 if (!registered_fb[con2fb.framebuffer])
1034 return -EINVAL;
1035 if (con2fb.console != 0)
1036 set_con2fb_map(con2fb.console-1, con2fb.framebuffer);
1037 else
1038 fb_console_init();
1039 return 0;
1040 #endif /* CONFIG_FRAMEBUFFER_CONSOLE */
1041 case FBIOBLANK:
1042 return fb_blank(info, arg);
1043 default:
1044 if (fb->fb_ioctl == NULL)
1045 return -EINVAL;
1046 return fb->fb_ioctl(inode, file, cmd, arg, info);
1047 }
1048 }
1049
1050 static int
1051 fb_mmap(struct file *file, struct vm_area_struct * vma)
1052 {
1053 int fbidx = iminor(file->f_dentry->d_inode);
1054 struct fb_info *info = registered_fb[fbidx];
1055 struct fb_ops *fb = info->fbops;
1056 unsigned long off;
1057 #if !defined(__sparc__) || defined(__sparc_v9__)
1058 unsigned long start;
1059 u32 len;
1060 #endif
1061
1062 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1063 return -EINVAL;
1064 off = vma->vm_pgoff << PAGE_SHIFT;
1065 if (!fb)
1066 return -ENODEV;
1067 if (fb->fb_mmap) {
1068 int res;
1069 lock_kernel();
1070 res = fb->fb_mmap(info, file, vma);
1071 unlock_kernel();
1072 return res;
1073 }
1074
1075 #if defined(__sparc__) && !defined(__sparc_v9__)
1076 /* Should never get here, all fb drivers should have their own
1077 mmap routines */
1078 return -EINVAL;
1079 #else
1080 /* !sparc32... */
1081 lock_kernel();
1082
1083 /* frame buffer memory */
1084 start = info->fix.smem_start;
1085 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1086 if (off >= len) {
1087 /* memory mapped io */
1088 off -= len;
1089 if (info->var.accel_flags) {
1090 unlock_kernel();
1091 return -EINVAL;
1092 }
1093 start = info->fix.mmio_start;
1094 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1095 }
1096 unlock_kernel();
1097 start &= PAGE_MASK;
1098 if ((vma->vm_end - vma->vm_start + off) > len)
1099 return -EINVAL;
1100 off += start;
1101 vma->vm_pgoff = off >> PAGE_SHIFT;
1102 /* This is an IO map - tell maydump to skip this VMA */
1103 vma->vm_flags |= VM_IO;
1104 #if defined(__sparc_v9__)
1105 vma->vm_flags |= (VM_SHM | VM_LOCKED);
1106 if (io_remap_page_range(vma, vma->vm_start, off,
1107 vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
1108 return -EAGAIN;
1109 #else
1110 #if defined(__mc68000__)
1111 #if defined(CONFIG_SUN3)
1112 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1113 #elif defined(CONFIG_MMU)
1114 if (CPU_IS_020_OR_030)
1115 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1116 if (CPU_IS_040_OR_060) {
1117 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1118 /* Use no-cache mode, serialized */
1119 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1120 }
1121 #endif
1122 #elif defined(__powerpc__)
1123 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
1124 #elif defined(__alpha__)
1125 /* Caching is off in the I/O space quadrant by design. */
1126 #elif defined(__i386__) || defined(__x86_64__)
1127 if (boot_cpu_data.x86 > 3)
1128 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1129 #elif defined(__mips__)
1130 pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
1131 pgprot_val(vma->vm_page_prot) |= _CACHE_UNCACHED;
1132 #elif defined(__sh__)
1133 pgprot_val(vma->vm_page_prot) &= ~_PAGE_CACHABLE;
1134 #elif defined(__hppa__)
1135 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1136 #elif defined(__ia64__) || defined(__arm__)
1137 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1138 #else
1139 #warning What do we have to do here??
1140 #endif
1141 if (io_remap_page_range(vma, vma->vm_start, off,
1142 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1143 return -EAGAIN;
1144 #endif /* !__sparc_v9__ */
1145 return 0;
1146 #endif /* !sparc32 */
1147 }
1148
1149 static int
1150 fb_open(struct inode *inode, struct file *file)
1151 {
1152 int fbidx = iminor(inode);
1153 struct fb_info *info;
1154 int res = 0;
1155
1156 if (fbidx >= FB_MAX)
1157 return -ENODEV;
1158 #ifdef CONFIG_KMOD
1159 if (!(info = registered_fb[fbidx]))
1160 try_to_load(fbidx);
1161 #endif /* CONFIG_KMOD */
1162 if (!(info = registered_fb[fbidx]))
1163 return -ENODEV;
1164 if (!try_module_get(info->fbops->owner))
1165 return -ENODEV;
1166 if (info->fbops->fb_open) {
1167 res = info->fbops->fb_open(info,1);
1168 if (res)
1169 module_put(info->fbops->owner);
1170 }
1171 return res;
1172 }
1173
1174 static int
1175 fb_release(struct inode *inode, struct file *file)
1176 {
1177 int fbidx = iminor(inode);
1178 struct fb_info *info;
1179
1180 lock_kernel();
1181 info = registered_fb[fbidx];
1182 if (info->fbops->fb_release)
1183 info->fbops->fb_release(info,1);
1184 module_put(info->fbops->owner);
1185 unlock_kernel();
1186 return 0;
1187 }
1188
1189 static struct file_operations fb_fops = {
1190 .owner = THIS_MODULE,
1191 .read = fb_read,
1192 .write = fb_write,
1193 .ioctl = fb_ioctl,
1194 .mmap = fb_mmap,
1195 .open = fb_open,
1196 .release = fb_release,
1197 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1198 .get_unmapped_area = get_fb_unmapped_area,
1199 #endif
1200 };
1201
1202 /**
1203 * register_framebuffer - registers a frame buffer device
1204 * @fb_info: frame buffer info structure
1205 *
1206 * Registers a frame buffer device @fb_info.
1207 *
1208 * Returns negative errno on error, or zero for success.
1209 *
1210 */
1211
1212 int
1213 register_framebuffer(struct fb_info *fb_info)
1214 {
1215 int i;
1216
1217 if (num_registered_fb == FB_MAX)
1218 return -ENXIO;
1219 num_registered_fb++;
1220 for (i = 0 ; i < FB_MAX; i++)
1221 if (!registered_fb[i])
1222 break;
1223 fb_info->node = i;
1224
1225 if (fb_info->pixmap.addr == NULL) {
1226 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1227 if (fb_info->pixmap.addr) {
1228 fb_info->pixmap.size = FBPIXMAPSIZE;
1229 fb_info->pixmap.buf_align = 1;
1230 fb_info->pixmap.scan_align = 1;
1231 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1232 }
1233 }
1234 fb_info->pixmap.offset = 0;
1235 if (fb_info->pixmap.outbuf == NULL)
1236 fb_info->pixmap.outbuf = sys_outbuf;
1237 if (fb_info->pixmap.inbuf == NULL)
1238 fb_info->pixmap.inbuf = sys_inbuf;
1239 spin_lock_init(&fb_info->pixmap.lock);
1240
1241 registered_fb[i] = fb_info;
1242
1243 devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1244 S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1245 return 0;
1246 }
1247
1248
1249 /**
1250 * unregister_framebuffer - releases a frame buffer device
1251 * @fb_info: frame buffer info structure
1252 *
1253 * Unregisters a frame buffer device @fb_info.
1254 *
1255 * Returns negative errno on error, or zero for success.
1256 *
1257 */
1258
1259 int
1260 unregister_framebuffer(struct fb_info *fb_info)
1261 {
1262 int i;
1263
1264 i = fb_info->node;
1265 if (!registered_fb[i])
1266 return -EINVAL;
1267 devfs_remove("fb/%d", i);
1268
1269 if (fb_info->pixmap.addr)
1270 kfree(fb_info->pixmap.addr);
1271 registered_fb[i]=NULL;
1272 num_registered_fb--;
1273 return 0;
1274 }
1275
1276
1277 /**
1278 * fbmem_init - init frame buffer subsystem
1279 *
1280 * Initialize the frame buffer subsystem.
1281 *
1282 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1283 *
1284 */
1285
1286 void __init
1287 fbmem_init(void)
1288 {
1289 int i;
1290
1291 create_proc_read_entry("fb", 0, 0, fbmem_read_proc, NULL);
1292
1293 devfs_mk_dir("fb");
1294 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1295 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1296
1297 #ifdef CONFIG_FB_OF
1298 if (ofonly) {
1299 offb_init();
1300 return;
1301 }
1302 #endif
1303
1304 /*
1305 * Probe for all builtin frame buffer devices
1306 */
1307 for (i = 0; i < num_pref_init_funcs; i++)
1308 pref_init_funcs[i]();
1309
1310 for (i = 0; i < NUM_FB_DRIVERS; i++)
1311 if (fb_drivers[i].init)
1312 fb_drivers[i].init();
1313 }
1314
1315
1316 /**
1317 * video_setup - process command line options
1318 * @options: string of options
1319 *
1320 * Process command line options for frame buffer subsystem.
1321 *
1322 * NOTE: This function is a __setup and __init function.
1323 *
1324 * Returns zero.
1325 *
1326 */
1327
1328 int __init video_setup(char *options)
1329 {
1330 int i, j;
1331
1332 if (!options || !*options)
1333 return 0;
1334
1335 #ifdef CONFIG_FB_OF
1336 if (!strcmp(options, "ofonly")) {
1337 ofonly = 1;
1338 return 0;
1339 }
1340 #endif
1341
1342 if (num_pref_init_funcs == FB_MAX)
1343 return 0;
1344
1345 for (i = 0; i < NUM_FB_DRIVERS; i++) {
1346 j = strlen(fb_drivers[i].name);
1347 if (!strncmp(options, fb_drivers[i].name, j) &&
1348 options[j] == ':') {
1349 if (!strcmp(options+j+1, "off"))
1350 fb_drivers[i].init = NULL;
1351 else {
1352 if (fb_drivers[i].init) {
1353 pref_init_funcs[num_pref_init_funcs++] =
1354 fb_drivers[i].init;
1355 fb_drivers[i].init = NULL;
1356 }
1357 if (fb_drivers[i].setup)
1358 fb_drivers[i].setup(options+j+1);
1359 }
1360 return 0;
1361 }
1362 }
1363
1364 /*
1365 * If we get here no fb was specified.
1366 * We consider the argument to be a global video mode option.
1367 */
1368 global_mode_option = options;
1369 return 0;
1370 }
1371
1372 __setup("video=", video_setup);
1373
1374 /*
1375 * Visible symbols for modules
1376 */
1377
1378 EXPORT_SYMBOL(register_framebuffer);
1379 EXPORT_SYMBOL(unregister_framebuffer);
1380 EXPORT_SYMBOL(num_registered_fb);
1381 EXPORT_SYMBOL(registered_fb);
1382 EXPORT_SYMBOL(fb_prepare_logo);
1383 EXPORT_SYMBOL(fb_show_logo);
1384 EXPORT_SYMBOL(fb_set_var);
1385 EXPORT_SYMBOL(fb_blank);
1386 EXPORT_SYMBOL(fb_pan_display);
1387 EXPORT_SYMBOL(fb_get_buffer_offset);
1388 EXPORT_SYMBOL(move_buf_unaligned);
1389 EXPORT_SYMBOL(move_buf_aligned);
1390
1391 MODULE_LICENSE("GPL");
Historical 2.5/2.6 development