Line data Source code
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/module.h>
15 :
16 : #include <linux/types.h>
17 : #include <linux/errno.h>
18 : #include <linux/kernel.h>
19 : #include <linux/slab.h>
20 : #include <linux/mm.h>
21 : #include <linux/mman.h>
22 : #include <linux/vt.h>
23 : #include <linux/init.h>
24 : #include <linux/linux_logo.h>
25 : #include <linux/platform_device.h>
26 : #include <linux/console.h>
27 : #include <linux/kmod.h>
28 : #include <linux/err.h>
29 : #include <linux/device.h>
30 : #include <linux/efi.h>
31 : #include <linux/fb.h>
32 : #include <linux/fbcon.h>
33 : #include <linux/mem_encrypt.h>
34 : #include <linux/pci.h>
35 :
36 : #include <video/nomodeset.h>
37 : #include <video/vga.h>
38 :
39 : #include "fb_internal.h"
40 :
41 : /*
42 : * Frame buffer device initialization and setup routines
43 : */
44 :
45 : #define FBPIXMAPSIZE (1024 * 8)
46 :
47 : struct class *fb_class;
48 :
49 : DEFINE_MUTEX(registration_lock);
50 : struct fb_info *registered_fb[FB_MAX] __read_mostly;
51 : int num_registered_fb __read_mostly;
52 : #define for_each_registered_fb(i) \
53 : for (i = 0; i < FB_MAX; i++) \
54 : if (!registered_fb[i]) {} else
55 :
56 : bool fb_center_logo __read_mostly;
57 :
58 : int fb_logo_count __read_mostly = -1;
59 :
60 0 : struct fb_info *get_fb_info(unsigned int idx)
61 : {
62 : struct fb_info *fb_info;
63 :
64 0 : if (idx >= FB_MAX)
65 : return ERR_PTR(-ENODEV);
66 :
67 0 : mutex_lock(®istration_lock);
68 0 : fb_info = registered_fb[idx];
69 0 : if (fb_info)
70 0 : refcount_inc(&fb_info->count);
71 0 : mutex_unlock(®istration_lock);
72 :
73 0 : return fb_info;
74 : }
75 :
76 0 : void put_fb_info(struct fb_info *fb_info)
77 : {
78 0 : if (!refcount_dec_and_test(&fb_info->count))
79 : return;
80 0 : if (fb_info->fbops->fb_destroy)
81 0 : fb_info->fbops->fb_destroy(fb_info);
82 : }
83 :
84 : /*
85 : * Helpers
86 : */
87 :
88 0 : int fb_get_color_depth(struct fb_var_screeninfo *var,
89 : struct fb_fix_screeninfo *fix)
90 : {
91 0 : int depth = 0;
92 :
93 0 : if (fix->visual == FB_VISUAL_MONO01 ||
94 : fix->visual == FB_VISUAL_MONO10)
95 : depth = 1;
96 : else {
97 0 : if (var->green.length == var->blue.length &&
98 0 : var->green.length == var->red.length &&
99 0 : var->green.offset == var->blue.offset &&
100 0 : var->green.offset == var->red.offset)
101 0 : depth = var->green.length;
102 : else
103 0 : depth = var->green.length + var->red.length +
104 : var->blue.length;
105 : }
106 :
107 0 : return depth;
108 : }
109 : EXPORT_SYMBOL(fb_get_color_depth);
110 :
111 : /*
112 : * Data padding functions.
113 : */
114 0 : void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
115 : {
116 0 : __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
117 0 : }
118 : EXPORT_SYMBOL(fb_pad_aligned_buffer);
119 :
120 0 : void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
121 : u32 shift_high, u32 shift_low, u32 mod)
122 : {
123 0 : u8 mask = (u8) (0xfff << shift_high), tmp;
124 : int i, j;
125 :
126 0 : for (i = height; i--; ) {
127 0 : for (j = 0; j < idx; j++) {
128 0 : tmp = dst[j];
129 0 : tmp &= mask;
130 0 : tmp |= *src >> shift_low;
131 0 : dst[j] = tmp;
132 0 : tmp = *src << shift_high;
133 0 : dst[j+1] = tmp;
134 0 : src++;
135 : }
136 0 : tmp = dst[idx];
137 0 : tmp &= mask;
138 0 : tmp |= *src >> shift_low;
139 0 : dst[idx] = tmp;
140 0 : if (shift_high < mod) {
141 0 : tmp = *src << shift_high;
142 0 : dst[idx+1] = tmp;
143 : }
144 0 : src++;
145 0 : dst += d_pitch;
146 : }
147 0 : }
148 : EXPORT_SYMBOL(fb_pad_unaligned_buffer);
149 :
150 : /*
151 : * we need to lock this section since fb_cursor
152 : * may use fb_imageblit()
153 : */
154 0 : char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
155 : {
156 0 : u32 align = buf->buf_align - 1, offset;
157 0 : char *addr = buf->addr;
158 :
159 : /* If IO mapped, we need to sync before access, no sharing of
160 : * the pixmap is done
161 : */
162 0 : if (buf->flags & FB_PIXMAP_IO) {
163 0 : if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
164 0 : info->fbops->fb_sync(info);
165 : return addr;
166 : }
167 :
168 : /* See if we fit in the remaining pixmap space */
169 0 : offset = buf->offset + align;
170 0 : offset &= ~align;
171 0 : if (offset + size > buf->size) {
172 : /* We do not fit. In order to be able to re-use the buffer,
173 : * we must ensure no asynchronous DMA'ing or whatever operation
174 : * is in progress, we sync for that.
175 : */
176 0 : if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
177 0 : info->fbops->fb_sync(info);
178 : offset = 0;
179 : }
180 0 : buf->offset = offset + size;
181 0 : addr += offset;
182 :
183 0 : return addr;
184 : }
185 : EXPORT_SYMBOL(fb_get_buffer_offset);
186 :
187 : #ifdef CONFIG_LOGO
188 :
189 : static inline unsigned safe_shift(unsigned d, int n)
190 : {
191 : return n < 0 ? d >> -n : d << n;
192 : }
193 :
194 : static void fb_set_logocmap(struct fb_info *info,
195 : const struct linux_logo *logo)
196 : {
197 : struct fb_cmap palette_cmap;
198 : u16 palette_green[16];
199 : u16 palette_blue[16];
200 : u16 palette_red[16];
201 : int i, j, n;
202 : const unsigned char *clut = logo->clut;
203 :
204 : palette_cmap.start = 0;
205 : palette_cmap.len = 16;
206 : palette_cmap.red = palette_red;
207 : palette_cmap.green = palette_green;
208 : palette_cmap.blue = palette_blue;
209 : palette_cmap.transp = NULL;
210 :
211 : for (i = 0; i < logo->clutsize; i += n) {
212 : n = logo->clutsize - i;
213 : /* palette_cmap provides space for only 16 colors at once */
214 : if (n > 16)
215 : n = 16;
216 : palette_cmap.start = 32 + i;
217 : palette_cmap.len = n;
218 : for (j = 0; j < n; ++j) {
219 : palette_cmap.red[j] = clut[0] << 8 | clut[0];
220 : palette_cmap.green[j] = clut[1] << 8 | clut[1];
221 : palette_cmap.blue[j] = clut[2] << 8 | clut[2];
222 : clut += 3;
223 : }
224 : fb_set_cmap(&palette_cmap, info);
225 : }
226 : }
227 :
228 : static void fb_set_logo_truepalette(struct fb_info *info,
229 : const struct linux_logo *logo,
230 : u32 *palette)
231 : {
232 : static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
233 : unsigned char redmask, greenmask, bluemask;
234 : int redshift, greenshift, blueshift;
235 : int i;
236 : const unsigned char *clut = logo->clut;
237 :
238 : /*
239 : * We have to create a temporary palette since console palette is only
240 : * 16 colors long.
241 : */
242 : /* Bug: Doesn't obey msb_right ... (who needs that?) */
243 : redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
244 : greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
245 : bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
246 : redshift = info->var.red.offset - (8 - info->var.red.length);
247 : greenshift = info->var.green.offset - (8 - info->var.green.length);
248 : blueshift = info->var.blue.offset - (8 - info->var.blue.length);
249 :
250 : for ( i = 0; i < logo->clutsize; i++) {
251 : palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
252 : safe_shift((clut[1] & greenmask), greenshift) |
253 : safe_shift((clut[2] & bluemask), blueshift));
254 : clut += 3;
255 : }
256 : }
257 :
258 : static void fb_set_logo_directpalette(struct fb_info *info,
259 : const struct linux_logo *logo,
260 : u32 *palette)
261 : {
262 : int redshift, greenshift, blueshift;
263 : int i;
264 :
265 : redshift = info->var.red.offset;
266 : greenshift = info->var.green.offset;
267 : blueshift = info->var.blue.offset;
268 :
269 : for (i = 32; i < 32 + logo->clutsize; i++)
270 : palette[i] = i << redshift | i << greenshift | i << blueshift;
271 : }
272 :
273 : static void fb_set_logo(struct fb_info *info,
274 : const struct linux_logo *logo, u8 *dst,
275 : int depth)
276 : {
277 : int i, j, k;
278 : const u8 *src = logo->data;
279 : u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
280 : u8 fg = 1, d;
281 :
282 : switch (fb_get_color_depth(&info->var, &info->fix)) {
283 : case 1:
284 : fg = 1;
285 : break;
286 : case 2:
287 : fg = 3;
288 : break;
289 : default:
290 : fg = 7;
291 : break;
292 : }
293 :
294 : if (info->fix.visual == FB_VISUAL_MONO01 ||
295 : info->fix.visual == FB_VISUAL_MONO10)
296 : fg = ~((u8) (0xfff << info->var.green.length));
297 :
298 : switch (depth) {
299 : case 4:
300 : for (i = 0; i < logo->height; i++)
301 : for (j = 0; j < logo->width; src++) {
302 : *dst++ = *src >> 4;
303 : j++;
304 : if (j < logo->width) {
305 : *dst++ = *src & 0x0f;
306 : j++;
307 : }
308 : }
309 : break;
310 : case 1:
311 : for (i = 0; i < logo->height; i++) {
312 : for (j = 0; j < logo->width; src++) {
313 : d = *src ^ xor;
314 : for (k = 7; k >= 0 && j < logo->width; k--) {
315 : *dst++ = ((d >> k) & 1) ? fg : 0;
316 : j++;
317 : }
318 : }
319 : }
320 : break;
321 : }
322 : }
323 :
324 : /*
325 : * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
326 : * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
327 : * the visual format and color depth of the framebuffer, the DAC, the
328 : * pseudo_palette, and the logo data will be adjusted accordingly.
329 : *
330 : * Case 1 - linux_logo_clut224:
331 : * Color exceeds the number of console colors (16), thus we set the hardware DAC
332 : * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
333 : *
334 : * For visuals that require color info from the pseudo_palette, we also construct
335 : * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
336 : * will be set.
337 : *
338 : * Case 2 - linux_logo_vga16:
339 : * The number of colors just matches the console colors, thus there is no need
340 : * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
341 : * each byte contains color information for two pixels (upper and lower nibble).
342 : * To be consistent with fb_imageblit() usage, we therefore separate the two
343 : * nibbles into separate bytes. The "depth" flag will be set to 4.
344 : *
345 : * Case 3 - linux_logo_mono:
346 : * This is similar with Case 2. Each byte contains information for 8 pixels.
347 : * We isolate each bit and expand each into a byte. The "depth" flag will
348 : * be set to 1.
349 : */
350 : static struct logo_data {
351 : int depth;
352 : int needs_directpalette;
353 : int needs_truepalette;
354 : int needs_cmapreset;
355 : const struct linux_logo *logo;
356 : } fb_logo __read_mostly;
357 :
358 : static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
359 : {
360 : u32 size = width * height, i;
361 :
362 : out += size - 1;
363 :
364 : for (i = size; i--; )
365 : *out-- = *in++;
366 : }
367 :
368 : static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
369 : {
370 : int i, j, h = height - 1;
371 :
372 : for (i = 0; i < height; i++)
373 : for (j = 0; j < width; j++)
374 : out[height * j + h - i] = *in++;
375 : }
376 :
377 : static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
378 : {
379 : int i, j, w = width - 1;
380 :
381 : for (i = 0; i < height; i++)
382 : for (j = 0; j < width; j++)
383 : out[height * (w - j) + i] = *in++;
384 : }
385 :
386 : static void fb_rotate_logo(struct fb_info *info, u8 *dst,
387 : struct fb_image *image, int rotate)
388 : {
389 : u32 tmp;
390 :
391 : if (rotate == FB_ROTATE_UD) {
392 : fb_rotate_logo_ud(image->data, dst, image->width,
393 : image->height);
394 : image->dx = info->var.xres - image->width - image->dx;
395 : image->dy = info->var.yres - image->height - image->dy;
396 : } else if (rotate == FB_ROTATE_CW) {
397 : fb_rotate_logo_cw(image->data, dst, image->width,
398 : image->height);
399 : swap(image->width, image->height);
400 : tmp = image->dy;
401 : image->dy = image->dx;
402 : image->dx = info->var.xres - image->width - tmp;
403 : } else if (rotate == FB_ROTATE_CCW) {
404 : fb_rotate_logo_ccw(image->data, dst, image->width,
405 : image->height);
406 : swap(image->width, image->height);
407 : tmp = image->dx;
408 : image->dx = image->dy;
409 : image->dy = info->var.yres - image->height - tmp;
410 : }
411 :
412 : image->data = dst;
413 : }
414 :
415 : static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
416 : int rotate, unsigned int num)
417 : {
418 : unsigned int x;
419 :
420 : if (image->width > info->var.xres || image->height > info->var.yres)
421 : return;
422 :
423 : if (rotate == FB_ROTATE_UR) {
424 : for (x = 0;
425 : x < num && image->dx + image->width <= info->var.xres;
426 : x++) {
427 : info->fbops->fb_imageblit(info, image);
428 : image->dx += image->width + 8;
429 : }
430 : } else if (rotate == FB_ROTATE_UD) {
431 : u32 dx = image->dx;
432 :
433 : for (x = 0; x < num && image->dx <= dx; x++) {
434 : info->fbops->fb_imageblit(info, image);
435 : image->dx -= image->width + 8;
436 : }
437 : } else if (rotate == FB_ROTATE_CW) {
438 : for (x = 0;
439 : x < num && image->dy + image->height <= info->var.yres;
440 : x++) {
441 : info->fbops->fb_imageblit(info, image);
442 : image->dy += image->height + 8;
443 : }
444 : } else if (rotate == FB_ROTATE_CCW) {
445 : u32 dy = image->dy;
446 :
447 : for (x = 0; x < num && image->dy <= dy; x++) {
448 : info->fbops->fb_imageblit(info, image);
449 : image->dy -= image->height + 8;
450 : }
451 : }
452 : }
453 :
454 : static int fb_show_logo_line(struct fb_info *info, int rotate,
455 : const struct linux_logo *logo, int y,
456 : unsigned int n)
457 : {
458 : u32 *palette = NULL, *saved_pseudo_palette = NULL;
459 : unsigned char *logo_new = NULL, *logo_rotate = NULL;
460 : struct fb_image image;
461 :
462 : /* Return if the frame buffer is not mapped or suspended */
463 : if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
464 : info->fbops->owner)
465 : return 0;
466 :
467 : image.depth = 8;
468 : image.data = logo->data;
469 :
470 : if (fb_logo.needs_cmapreset)
471 : fb_set_logocmap(info, logo);
472 :
473 : if (fb_logo.needs_truepalette ||
474 : fb_logo.needs_directpalette) {
475 : palette = kmalloc(256 * 4, GFP_KERNEL);
476 : if (palette == NULL)
477 : return 0;
478 :
479 : if (fb_logo.needs_truepalette)
480 : fb_set_logo_truepalette(info, logo, palette);
481 : else
482 : fb_set_logo_directpalette(info, logo, palette);
483 :
484 : saved_pseudo_palette = info->pseudo_palette;
485 : info->pseudo_palette = palette;
486 : }
487 :
488 : if (fb_logo.depth <= 4) {
489 : logo_new = kmalloc_array(logo->width, logo->height,
490 : GFP_KERNEL);
491 : if (logo_new == NULL) {
492 : kfree(palette);
493 : if (saved_pseudo_palette)
494 : info->pseudo_palette = saved_pseudo_palette;
495 : return 0;
496 : }
497 : image.data = logo_new;
498 : fb_set_logo(info, logo, logo_new, fb_logo.depth);
499 : }
500 :
501 : if (fb_center_logo) {
502 : int xres = info->var.xres;
503 : int yres = info->var.yres;
504 :
505 : if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) {
506 : xres = info->var.yres;
507 : yres = info->var.xres;
508 : }
509 :
510 : while (n && (n * (logo->width + 8) - 8 > xres))
511 : --n;
512 : image.dx = (xres - (n * (logo->width + 8) - 8)) / 2;
513 : image.dy = y ?: (yres - logo->height) / 2;
514 : } else {
515 : image.dx = 0;
516 : image.dy = y;
517 : }
518 :
519 : image.width = logo->width;
520 : image.height = logo->height;
521 :
522 : if (rotate) {
523 : logo_rotate = kmalloc_array(logo->width, logo->height,
524 : GFP_KERNEL);
525 : if (logo_rotate)
526 : fb_rotate_logo(info, logo_rotate, &image, rotate);
527 : }
528 :
529 : fb_do_show_logo(info, &image, rotate, n);
530 :
531 : kfree(palette);
532 : if (saved_pseudo_palette != NULL)
533 : info->pseudo_palette = saved_pseudo_palette;
534 : kfree(logo_new);
535 : kfree(logo_rotate);
536 : return image.dy + logo->height;
537 : }
538 :
539 :
540 : #ifdef CONFIG_FB_LOGO_EXTRA
541 :
542 : #define FB_LOGO_EX_NUM_MAX 10
543 : static struct logo_data_extra {
544 : const struct linux_logo *logo;
545 : unsigned int n;
546 : } fb_logo_ex[FB_LOGO_EX_NUM_MAX];
547 : static unsigned int fb_logo_ex_num;
548 :
549 : void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
550 : {
551 : if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
552 : return;
553 :
554 : fb_logo_ex[fb_logo_ex_num].logo = logo;
555 : fb_logo_ex[fb_logo_ex_num].n = n;
556 : fb_logo_ex_num++;
557 : }
558 :
559 : static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
560 : unsigned int yres)
561 : {
562 : unsigned int i;
563 :
564 : /* FIXME: logo_ex supports only truecolor fb. */
565 : if (info->fix.visual != FB_VISUAL_TRUECOLOR)
566 : fb_logo_ex_num = 0;
567 :
568 : for (i = 0; i < fb_logo_ex_num; i++) {
569 : if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
570 : fb_logo_ex[i].logo = NULL;
571 : continue;
572 : }
573 : height += fb_logo_ex[i].logo->height;
574 : if (height > yres) {
575 : height -= fb_logo_ex[i].logo->height;
576 : fb_logo_ex_num = i;
577 : break;
578 : }
579 : }
580 : return height;
581 : }
582 :
583 : static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
584 : {
585 : unsigned int i;
586 :
587 : for (i = 0; i < fb_logo_ex_num; i++)
588 : y = fb_show_logo_line(info, rotate,
589 : fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
590 :
591 : return y;
592 : }
593 :
594 : #else /* !CONFIG_FB_LOGO_EXTRA */
595 :
596 : static inline int fb_prepare_extra_logos(struct fb_info *info,
597 : unsigned int height,
598 : unsigned int yres)
599 : {
600 : return height;
601 : }
602 :
603 : static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
604 : {
605 : return y;
606 : }
607 :
608 : #endif /* CONFIG_FB_LOGO_EXTRA */
609 :
610 :
611 : int fb_prepare_logo(struct fb_info *info, int rotate)
612 : {
613 : int depth = fb_get_color_depth(&info->var, &info->fix);
614 : unsigned int yres;
615 : int height;
616 :
617 : memset(&fb_logo, 0, sizeof(struct logo_data));
618 :
619 : if (info->flags & FBINFO_MISC_TILEBLITTING ||
620 : info->fbops->owner || !fb_logo_count)
621 : return 0;
622 :
623 : if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
624 : depth = info->var.blue.length;
625 : if (info->var.red.length < depth)
626 : depth = info->var.red.length;
627 : if (info->var.green.length < depth)
628 : depth = info->var.green.length;
629 : }
630 :
631 : if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
632 : /* assume console colormap */
633 : depth = 4;
634 : }
635 :
636 : /* Return if no suitable logo was found */
637 : fb_logo.logo = fb_find_logo(depth);
638 :
639 : if (!fb_logo.logo) {
640 : return 0;
641 : }
642 :
643 : if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
644 : yres = info->var.yres;
645 : else
646 : yres = info->var.xres;
647 :
648 : if (fb_logo.logo->height > yres) {
649 : fb_logo.logo = NULL;
650 : return 0;
651 : }
652 :
653 : /* What depth we asked for might be different from what we get */
654 : if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
655 : fb_logo.depth = 8;
656 : else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
657 : fb_logo.depth = 4;
658 : else
659 : fb_logo.depth = 1;
660 :
661 :
662 : if (fb_logo.depth > 4 && depth > 4) {
663 : switch (info->fix.visual) {
664 : case FB_VISUAL_TRUECOLOR:
665 : fb_logo.needs_truepalette = 1;
666 : break;
667 : case FB_VISUAL_DIRECTCOLOR:
668 : fb_logo.needs_directpalette = 1;
669 : fb_logo.needs_cmapreset = 1;
670 : break;
671 : case FB_VISUAL_PSEUDOCOLOR:
672 : fb_logo.needs_cmapreset = 1;
673 : break;
674 : }
675 : }
676 :
677 : height = fb_logo.logo->height;
678 : if (fb_center_logo)
679 : height += (yres - fb_logo.logo->height) / 2;
680 :
681 : return fb_prepare_extra_logos(info, height, yres);
682 : }
683 :
684 : int fb_show_logo(struct fb_info *info, int rotate)
685 : {
686 : unsigned int count;
687 : int y;
688 :
689 : if (!fb_logo_count)
690 : return 0;
691 :
692 : count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count;
693 : y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count);
694 : y = fb_show_extra_logos(info, y, rotate);
695 :
696 : return y;
697 : }
698 : #else
699 0 : int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
700 0 : int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
701 : #endif /* CONFIG_LOGO */
702 : EXPORT_SYMBOL(fb_prepare_logo);
703 : EXPORT_SYMBOL(fb_show_logo);
704 :
705 : int
706 0 : fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
707 : {
708 0 : struct fb_fix_screeninfo *fix = &info->fix;
709 0 : unsigned int yres = info->var.yres;
710 0 : int err = 0;
711 :
712 0 : if (var->yoffset > 0) {
713 0 : if (var->vmode & FB_VMODE_YWRAP) {
714 0 : if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
715 : err = -EINVAL;
716 : else
717 0 : yres = 0;
718 0 : } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
719 0 : err = -EINVAL;
720 : }
721 :
722 0 : if (var->xoffset > 0 && (!fix->xpanstep ||
723 0 : (var->xoffset % fix->xpanstep)))
724 0 : err = -EINVAL;
725 :
726 0 : if (err || !info->fbops->fb_pan_display ||
727 0 : var->yoffset > info->var.yres_virtual - yres ||
728 0 : var->xoffset > info->var.xres_virtual - info->var.xres)
729 : return -EINVAL;
730 :
731 0 : if ((err = info->fbops->fb_pan_display(var, info)))
732 : return err;
733 0 : info->var.xoffset = var->xoffset;
734 0 : info->var.yoffset = var->yoffset;
735 0 : if (var->vmode & FB_VMODE_YWRAP)
736 0 : info->var.vmode |= FB_VMODE_YWRAP;
737 : else
738 0 : info->var.vmode &= ~FB_VMODE_YWRAP;
739 : return 0;
740 : }
741 : EXPORT_SYMBOL(fb_pan_display);
742 :
743 0 : static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
744 : u32 activate)
745 : {
746 : struct fb_blit_caps caps, fbcaps;
747 0 : int err = 0;
748 :
749 0 : memset(&caps, 0, sizeof(caps));
750 0 : memset(&fbcaps, 0, sizeof(fbcaps));
751 0 : caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
752 0 : fbcon_get_requirement(info, &caps);
753 0 : info->fbops->fb_get_caps(info, &fbcaps, var);
754 :
755 0 : if (((fbcaps.x ^ caps.x) & caps.x) ||
756 0 : ((fbcaps.y ^ caps.y) & caps.y) ||
757 0 : (fbcaps.len < caps.len))
758 0 : err = -EINVAL;
759 :
760 0 : return err;
761 : }
762 :
763 : int
764 0 : fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
765 : {
766 0 : int ret = 0;
767 : u32 activate;
768 : struct fb_var_screeninfo old_var;
769 : struct fb_videomode mode;
770 : struct fb_event event;
771 : u32 unused;
772 :
773 0 : if (var->activate & FB_ACTIVATE_INV_MODE) {
774 : struct fb_videomode mode1, mode2;
775 :
776 0 : fb_var_to_videomode(&mode1, var);
777 0 : fb_var_to_videomode(&mode2, &info->var);
778 : /* make sure we don't delete the videomode of current var */
779 0 : ret = fb_mode_is_equal(&mode1, &mode2);
780 0 : if (!ret) {
781 0 : ret = fbcon_mode_deleted(info, &mode1);
782 : if (!ret)
783 0 : fb_delete_videomode(&mode1, &info->modelist);
784 : }
785 :
786 0 : return ret ? -EINVAL : 0;
787 : }
788 :
789 0 : if (!(var->activate & FB_ACTIVATE_FORCE) &&
790 0 : !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo)))
791 : return 0;
792 :
793 0 : activate = var->activate;
794 :
795 : /* When using FOURCC mode, make sure the red, green, blue and
796 : * transp fields are set to 0.
797 : */
798 0 : if ((info->fix.capabilities & FB_CAP_FOURCC) &&
799 0 : var->grayscale > 1) {
800 0 : if (var->red.offset || var->green.offset ||
801 0 : var->blue.offset || var->transp.offset ||
802 0 : var->red.length || var->green.length ||
803 0 : var->blue.length || var->transp.length ||
804 0 : var->red.msb_right || var->green.msb_right ||
805 0 : var->blue.msb_right || var->transp.msb_right)
806 : return -EINVAL;
807 : }
808 :
809 0 : if (!info->fbops->fb_check_var) {
810 0 : *var = info->var;
811 0 : return 0;
812 : }
813 :
814 : /* bitfill_aligned() assumes that it's at least 8x8 */
815 0 : if (var->xres < 8 || var->yres < 8)
816 : return -EINVAL;
817 :
818 : /* Too huge resolution causes multiplication overflow. */
819 0 : if (check_mul_overflow(var->xres, var->yres, &unused) ||
820 0 : check_mul_overflow(var->xres_virtual, var->yres_virtual, &unused))
821 : return -EINVAL;
822 :
823 0 : ret = info->fbops->fb_check_var(var, info);
824 :
825 0 : if (ret)
826 : return ret;
827 :
828 : /* verify that virtual resolution >= physical resolution */
829 0 : if (var->xres_virtual < var->xres ||
830 0 : var->yres_virtual < var->yres) {
831 0 : pr_warn("WARNING: fbcon: Driver '%s' missed to adjust virtual screen size (%ux%u vs. %ux%u)\n",
832 : info->fix.id,
833 : var->xres_virtual, var->yres_virtual,
834 : var->xres, var->yres);
835 0 : return -EINVAL;
836 : }
837 :
838 0 : if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW)
839 : return 0;
840 :
841 0 : if (info->fbops->fb_get_caps) {
842 0 : ret = fb_check_caps(info, var, activate);
843 :
844 0 : if (ret)
845 : return ret;
846 : }
847 :
848 0 : old_var = info->var;
849 0 : info->var = *var;
850 :
851 0 : if (info->fbops->fb_set_par) {
852 0 : ret = info->fbops->fb_set_par(info);
853 :
854 0 : if (ret) {
855 0 : info->var = old_var;
856 0 : printk(KERN_WARNING "detected "
857 : "fb_set_par error, "
858 : "error code: %d\n", ret);
859 0 : return ret;
860 : }
861 : }
862 :
863 0 : fb_pan_display(info, &info->var);
864 0 : fb_set_cmap(&info->cmap, info);
865 0 : fb_var_to_videomode(&mode, &info->var);
866 :
867 0 : if (info->modelist.prev && info->modelist.next &&
868 0 : !list_empty(&info->modelist))
869 0 : ret = fb_add_videomode(&mode, &info->modelist);
870 :
871 0 : if (ret)
872 : return ret;
873 :
874 0 : event.info = info;
875 0 : event.data = &mode;
876 0 : fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event);
877 :
878 0 : return 0;
879 : }
880 : EXPORT_SYMBOL(fb_set_var);
881 :
882 : int
883 0 : fb_blank(struct fb_info *info, int blank)
884 : {
885 : struct fb_event event;
886 0 : int ret = -EINVAL;
887 :
888 0 : if (blank > FB_BLANK_POWERDOWN)
889 0 : blank = FB_BLANK_POWERDOWN;
890 :
891 0 : event.info = info;
892 0 : event.data = ␣
893 :
894 0 : if (info->fbops->fb_blank)
895 0 : ret = info->fbops->fb_blank(blank, info);
896 :
897 : if (!ret)
898 : fb_notifier_call_chain(FB_EVENT_BLANK, &event);
899 :
900 0 : return ret;
901 : }
902 : EXPORT_SYMBOL(fb_blank);
903 :
904 0 : static int fb_check_foreignness(struct fb_info *fi)
905 : {
906 0 : const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
907 :
908 0 : fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
909 :
910 : #ifdef __BIG_ENDIAN
911 : fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
912 : #else
913 0 : fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
914 : #endif /* __BIG_ENDIAN */
915 :
916 0 : if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
917 0 : pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
918 : "support this framebuffer\n", fi->fix.id);
919 0 : return -ENOSYS;
920 : } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
921 : pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
922 : "support this framebuffer\n", fi->fix.id);
923 : return -ENOSYS;
924 : }
925 :
926 : return 0;
927 : }
928 :
929 0 : static int do_register_framebuffer(struct fb_info *fb_info)
930 : {
931 : int i;
932 : struct fb_videomode mode;
933 :
934 0 : if (fb_check_foreignness(fb_info))
935 : return -ENOSYS;
936 :
937 0 : if (num_registered_fb == FB_MAX)
938 : return -ENXIO;
939 :
940 0 : num_registered_fb++;
941 0 : for (i = 0 ; i < FB_MAX; i++)
942 0 : if (!registered_fb[i])
943 : break;
944 0 : fb_info->node = i;
945 0 : refcount_set(&fb_info->count, 1);
946 0 : mutex_init(&fb_info->lock);
947 0 : mutex_init(&fb_info->mm_lock);
948 :
949 0 : fb_device_create(fb_info);
950 :
951 0 : if (fb_info->pixmap.addr == NULL) {
952 0 : fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
953 0 : if (fb_info->pixmap.addr) {
954 0 : fb_info->pixmap.size = FBPIXMAPSIZE;
955 0 : fb_info->pixmap.buf_align = 1;
956 0 : fb_info->pixmap.scan_align = 1;
957 0 : fb_info->pixmap.access_align = 32;
958 0 : fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
959 : }
960 : }
961 0 : fb_info->pixmap.offset = 0;
962 :
963 0 : if (!fb_info->pixmap.blit_x)
964 0 : fb_info->pixmap.blit_x = ~(u32)0;
965 :
966 0 : if (!fb_info->pixmap.blit_y)
967 0 : fb_info->pixmap.blit_y = ~(u32)0;
968 :
969 0 : if (!fb_info->modelist.prev || !fb_info->modelist.next)
970 0 : INIT_LIST_HEAD(&fb_info->modelist);
971 :
972 : if (fb_info->skip_vt_switch)
973 : pm_vt_switch_required(fb_info->device, false);
974 : else
975 0 : pm_vt_switch_required(fb_info->device, true);
976 :
977 0 : fb_var_to_videomode(&mode, &fb_info->var);
978 0 : fb_add_videomode(&mode, &fb_info->modelist);
979 0 : registered_fb[i] = fb_info;
980 :
981 : #ifdef CONFIG_GUMSTIX_AM200EPD
982 : {
983 : struct fb_event event;
984 : event.info = fb_info;
985 : fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
986 : }
987 : #endif
988 :
989 0 : return fbcon_fb_registered(fb_info);
990 : }
991 :
992 0 : static void unbind_console(struct fb_info *fb_info)
993 : {
994 0 : int i = fb_info->node;
995 :
996 0 : if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
997 : return;
998 :
999 : fbcon_fb_unbind(fb_info);
1000 : }
1001 :
1002 0 : static void unlink_framebuffer(struct fb_info *fb_info)
1003 : {
1004 : int i;
1005 :
1006 0 : i = fb_info->node;
1007 0 : if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info))
1008 : return;
1009 :
1010 0 : fb_device_destroy(fb_info);
1011 0 : pm_vt_switch_unregister(fb_info->device);
1012 0 : unbind_console(fb_info);
1013 : }
1014 :
1015 0 : static void do_unregister_framebuffer(struct fb_info *fb_info)
1016 : {
1017 0 : unlink_framebuffer(fb_info);
1018 0 : if (fb_info->pixmap.addr &&
1019 0 : (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) {
1020 0 : kfree(fb_info->pixmap.addr);
1021 0 : fb_info->pixmap.addr = NULL;
1022 : }
1023 :
1024 0 : fb_destroy_modelist(&fb_info->modelist);
1025 0 : registered_fb[fb_info->node] = NULL;
1026 0 : num_registered_fb--;
1027 : #ifdef CONFIG_GUMSTIX_AM200EPD
1028 : {
1029 : struct fb_event event;
1030 : event.info = fb_info;
1031 : fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1032 : }
1033 : #endif
1034 0 : fbcon_fb_unregistered(fb_info);
1035 :
1036 : /* this may free fb info */
1037 0 : put_fb_info(fb_info);
1038 0 : }
1039 :
1040 : /**
1041 : * register_framebuffer - registers a frame buffer device
1042 : * @fb_info: frame buffer info structure
1043 : *
1044 : * Registers a frame buffer device @fb_info.
1045 : *
1046 : * Returns negative errno on error, or zero for success.
1047 : *
1048 : */
1049 : int
1050 0 : register_framebuffer(struct fb_info *fb_info)
1051 : {
1052 : int ret;
1053 :
1054 0 : mutex_lock(®istration_lock);
1055 0 : ret = do_register_framebuffer(fb_info);
1056 0 : mutex_unlock(®istration_lock);
1057 :
1058 0 : return ret;
1059 : }
1060 : EXPORT_SYMBOL(register_framebuffer);
1061 :
1062 : /**
1063 : * unregister_framebuffer - releases a frame buffer device
1064 : * @fb_info: frame buffer info structure
1065 : *
1066 : * Unregisters a frame buffer device @fb_info.
1067 : *
1068 : * Returns negative errno on error, or zero for success.
1069 : *
1070 : * This function will also notify the framebuffer console
1071 : * to release the driver.
1072 : *
1073 : * This is meant to be called within a driver's module_exit()
1074 : * function. If this is called outside module_exit(), ensure
1075 : * that the driver implements fb_open() and fb_release() to
1076 : * check that no processes are using the device.
1077 : */
1078 : void
1079 0 : unregister_framebuffer(struct fb_info *fb_info)
1080 : {
1081 0 : mutex_lock(®istration_lock);
1082 0 : do_unregister_framebuffer(fb_info);
1083 0 : mutex_unlock(®istration_lock);
1084 0 : }
1085 : EXPORT_SYMBOL(unregister_framebuffer);
1086 :
1087 : /**
1088 : * fb_set_suspend - low level driver signals suspend
1089 : * @info: framebuffer affected
1090 : * @state: 0 = resuming, !=0 = suspending
1091 : *
1092 : * This is meant to be used by low level drivers to
1093 : * signal suspend/resume to the core & clients.
1094 : * It must be called with the console semaphore held
1095 : */
1096 0 : void fb_set_suspend(struct fb_info *info, int state)
1097 : {
1098 0 : WARN_CONSOLE_UNLOCKED();
1099 :
1100 0 : if (state) {
1101 0 : fbcon_suspended(info);
1102 0 : info->state = FBINFO_STATE_SUSPENDED;
1103 : } else {
1104 0 : info->state = FBINFO_STATE_RUNNING;
1105 0 : fbcon_resumed(info);
1106 : }
1107 0 : }
1108 : EXPORT_SYMBOL(fb_set_suspend);
1109 :
1110 1 : static int __init fbmem_init(void)
1111 : {
1112 : int ret;
1113 :
1114 1 : fb_class = class_create("graphics");
1115 2 : if (IS_ERR(fb_class)) {
1116 0 : ret = PTR_ERR(fb_class);
1117 0 : pr_err("Unable to create fb class; errno = %d\n", ret);
1118 0 : goto err_fb_class;
1119 : }
1120 :
1121 1 : ret = fb_init_procfs();
1122 1 : if (ret)
1123 : goto err_class_destroy;
1124 :
1125 1 : ret = fb_register_chrdev();
1126 1 : if (ret)
1127 : goto err_fb_cleanup_procfs;
1128 :
1129 : fb_console_init();
1130 :
1131 : return 0;
1132 :
1133 : err_fb_cleanup_procfs:
1134 0 : fb_cleanup_procfs();
1135 : err_class_destroy:
1136 0 : class_destroy(fb_class);
1137 : err_fb_class:
1138 0 : fb_class = NULL;
1139 0 : return ret;
1140 : }
1141 :
1142 : #ifdef MODULE
1143 : static void __exit fbmem_exit(void)
1144 : {
1145 : fb_console_exit();
1146 : fb_unregister_chrdev();
1147 : fb_cleanup_procfs();
1148 : class_destroy(fb_class);
1149 : }
1150 :
1151 : module_init(fbmem_init);
1152 : module_exit(fbmem_exit);
1153 : MODULE_LICENSE("GPL");
1154 : MODULE_DESCRIPTION("Framebuffer base");
1155 : #else
1156 : subsys_initcall(fbmem_init);
1157 : #endif
1158 :
1159 0 : int fb_new_modelist(struct fb_info *info)
1160 : {
1161 0 : struct fb_var_screeninfo var = info->var;
1162 : struct list_head *pos, *n;
1163 : struct fb_modelist *modelist;
1164 : struct fb_videomode *m, mode;
1165 : int err;
1166 :
1167 0 : list_for_each_safe(pos, n, &info->modelist) {
1168 0 : modelist = list_entry(pos, struct fb_modelist, list);
1169 0 : m = &modelist->mode;
1170 0 : fb_videomode_to_var(&var, m);
1171 0 : var.activate = FB_ACTIVATE_TEST;
1172 0 : err = fb_set_var(info, &var);
1173 0 : fb_var_to_videomode(&mode, &var);
1174 0 : if (err || !fb_mode_is_equal(m, &mode)) {
1175 0 : list_del(pos);
1176 0 : kfree(pos);
1177 : }
1178 : }
1179 :
1180 0 : if (list_empty(&info->modelist))
1181 : return 1;
1182 :
1183 0 : fbcon_new_modelist(info);
1184 :
1185 0 : return 0;
1186 : }
1187 :
1188 : #if defined(CONFIG_VIDEO_NOMODESET)
1189 0 : bool fb_modesetting_disabled(const char *drvname)
1190 : {
1191 0 : bool fwonly = video_firmware_drivers_only();
1192 :
1193 0 : if (fwonly)
1194 0 : pr_warn("Driver %s not loading because of nomodeset parameter\n",
1195 : drvname);
1196 :
1197 0 : return fwonly;
1198 : }
1199 : EXPORT_SYMBOL(fb_modesetting_disabled);
1200 : #endif
1201 :
1202 : MODULE_LICENSE("GPL");
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