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MOXA linux-2.6.x / linux-2.6.9-uc0 from sdlinux-moxaart.tgz
[linux-2.6.9-moxart.git] / drivers / video / fbmem.c
blobef5cea5a0fb4f2d58a14170b24e2381567a8ba02
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 #include <linux/console.h>
31 #ifdef CONFIG_KMOD
32 #include <linux/kmod.h>
33 #endif
34 #include <linux/devfs_fs_kernel.h>
35 #include <linux/err.h>
36 #include <linux/kernel.h>
37 #include <linux/device.h>
38
39 #if defined(__mc68000__) || defined(CONFIG_APUS)
40 #include <asm/setup.h>
41 #endif
42
43 #include <asm/io.h>
44 #include <asm/uaccess.h>
45 #include <asm/page.h>
46 #include <asm/pgtable.h>
47
48 #include <linux/fb.h>
49
50 /*
51 * Frame buffer device initialization and setup routines
52 */
53
54 #define FBPIXMAPSIZE 16384
55
56 static struct notifier_block *fb_notifier_list;
57 struct fb_info *registered_fb[FB_MAX];
58 int num_registered_fb;
59
60 /*
61 * Helpers
62 */
63
64 int fb_get_color_depth(struct fb_info *info)
65 {
66 struct fb_var_screeninfo *var = &info->var;
67
68 if (var->green.length == var->blue.length &&
69 var->green.length == var->red.length &&
70 !var->green.offset && !var->blue.offset &&
71 !var->red.offset)
72 return var->green.length;
73 else
74 return (var->green.length + var->red.length +
75 var->blue.length);
76 }
77 EXPORT_SYMBOL(fb_get_color_depth);
78
79 /*
80 * Drawing helpers.
81 */
82 void fb_iomove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
83 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
84 u32 height)
85 {
86 int i;
87
88 for (i = height; i--; ) {
89 buf->outbuf(info, dst, src, s_pitch);
90 src += s_pitch;
91 dst += d_pitch;
92 }
93 }
94
95 void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
96 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
97 u32 height)
98 {
99 int i, j;
100
101 for (i = height; i--; ) {
102 for (j = 0; j < s_pitch; j++)
103 dst[j] = src[j];
104 src += s_pitch;
105 dst += d_pitch;
106 }
107 }
108
109 void fb_iomove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
110 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
111 u32 height, u32 shift_high, u32 shift_low,
112 u32 mod)
113 {
114 u8 mask = (u8) (0xfff << shift_high), tmp;
115 int i, j;
116
117 for (i = height; i--; ) {
118 for (j = 0; j < idx; j++) {
119 tmp = buf->inbuf(info, dst+j);
120 tmp &= mask;
121 tmp |= *src >> shift_low;
122 buf->outbuf(info, dst+j, &tmp, 1);
123 tmp = *src << shift_high;
124 buf->outbuf(info, dst+j+1, &tmp, 1);
125 src++;
126 }
127 tmp = buf->inbuf(info, dst+idx);
128 tmp &= mask;
129 tmp |= *src >> shift_low;
130 buf->outbuf(info, dst+idx, &tmp, 1);
131 if (shift_high < mod) {
132 tmp = *src << shift_high;
133 buf->outbuf(info, dst+idx+1, &tmp, 1);
134 }
135 src++;
136 dst += d_pitch;
137 }
138 }
139
140 void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
141 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
142 u32 height, u32 shift_high, u32 shift_low,
143 u32 mod)
144 {
145 u8 mask = (u8) (0xfff << shift_high), tmp;
146 int i, j;
147
148 for (i = height; i--; ) {
149 for (j = 0; j < idx; j++) {
150 tmp = dst[j];
151 tmp &= mask;
152 tmp |= *src >> shift_low;
153 dst[j] = tmp;
154 tmp = *src << shift_high;
155 dst[j+1] = tmp;
156 src++;
157 }
158 tmp = dst[idx];
159 tmp &= mask;
160 tmp |= *src >> shift_low;
161 dst[idx] = tmp;
162 if (shift_high < mod) {
163 tmp = *src << shift_high;
164 dst[idx+1] = tmp;
165 }
166 src++;
167 dst += d_pitch;
168 }
169 }
170
171 /*
172 * we need to lock this section since fb_cursor
173 * may use fb_imageblit()
174 */
175 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
176 {
177 u32 align = buf->buf_align - 1, offset;
178 char *addr = buf->addr;
179
180 /* If IO mapped, we need to sync before access, no sharing of
181 * the pixmap is done
182 */
183 if (buf->flags & FB_PIXMAP_IO) {
184 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
185 info->fbops->fb_sync(info);
186 return addr;
187 }
188
189 /* See if we fit in the remaining pixmap space */
190 offset = buf->offset + align;
191 offset &= ~align;
192 if (offset + size > buf->size) {
193 /* We do not fit. In order to be able to re-use the buffer,
194 * we must ensure no asynchronous DMA'ing or whatever operation
195 * is in progress, we sync for that.
196 */
197 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
198 info->fbops->fb_sync(info);
199 offset = 0;
200 }
201 buf->offset = offset + size;
202 addr += offset;
203
204 return addr;
205 }
206
207 #ifdef CONFIG_LOGO
208 #include <linux/linux_logo.h>
209
210 static inline unsigned safe_shift(unsigned d, int n)
211 {
212 return n < 0 ? d >> -n : d << n;
213 }
214
215 static void fb_set_logocmap(struct fb_info *info,
216 const struct linux_logo *logo)
217 {
218 struct fb_cmap palette_cmap;
219 u16 palette_green[16];
220 u16 palette_blue[16];
221 u16 palette_red[16];
222 int i, j, n;
223 const unsigned char *clut = logo->clut;
224
225 palette_cmap.start = 0;
226 palette_cmap.len = 16;
227 palette_cmap.red = palette_red;
228 palette_cmap.green = palette_green;
229 palette_cmap.blue = palette_blue;
230 palette_cmap.transp = NULL;
231
232 for (i = 0; i < logo->clutsize; i += n) {
233 n = logo->clutsize - i;
234 /* palette_cmap provides space for only 16 colors at once */
235 if (n > 16)
236 n = 16;
237 palette_cmap.start = 32 + i;
238 palette_cmap.len = n;
239 for (j = 0; j < n; ++j) {
240 palette_cmap.red[j] = clut[0] << 8 | clut[0];
241 palette_cmap.green[j] = clut[1] << 8 | clut[1];
242 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
243 clut += 3;
244 }
245 fb_set_cmap(&palette_cmap, info);
246 }
247 }
248
249 static void fb_set_logo_truepalette(struct fb_info *info,
250 const struct linux_logo *logo,
251 u32 *palette)
252 {
253 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
254 unsigned char redmask, greenmask, bluemask;
255 int redshift, greenshift, blueshift;
256 int i;
257 const unsigned char *clut = logo->clut;
258
259 /*
260 * We have to create a temporary palette since console palette is only
261 * 16 colors long.
262 */
263 /* Bug: Doesn't obey msb_right ... (who needs that?) */
264 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
265 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
266 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
267 redshift = info->var.red.offset - (8 - info->var.red.length);
268 greenshift = info->var.green.offset - (8 - info->var.green.length);
269 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
270
271 for ( i = 0; i < logo->clutsize; i++) {
272 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
273 safe_shift((clut[1] & greenmask), greenshift) |
274 safe_shift((clut[2] & bluemask), blueshift));
275 clut += 3;
276 }
277 }
278
279 static void fb_set_logo_directpalette(struct fb_info *info,
280 const struct linux_logo *logo,
281 u32 *palette)
282 {
283 int redshift, greenshift, blueshift;
284 int i;
285
286 redshift = info->var.red.offset;
287 greenshift = info->var.green.offset;
288 blueshift = info->var.blue.offset;
289
290 for (i = 32; i < logo->clutsize; i++)
291 palette[i] = i << redshift | i << greenshift | i << blueshift;
292 }
293
294 static void fb_set_logo(struct fb_info *info,
295 const struct linux_logo *logo, u8 *dst,
296 int depth)
297 {
298 int i, j, k, fg = 1;
299 const u8 *src = logo->data;
300 u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
301
302 if (fb_get_color_depth(info) == 3)
303 fg = 7;
304
305 switch (depth) {
306 case 4:
307 for (i = 0; i < logo->height; i++)
308 for (j = 0; j < logo->width; src++) {
309 *dst++ = *src >> 4;
310 j++;
311 if (j < logo->width) {
312 *dst++ = *src & 0x0f;
313 j++;
314 }
315 }
316 break;
317 case 1:
318 for (i = 0; i < logo->height; i++) {
319 for (j = 0; j < logo->width; src++) {
320 d = *src ^ xor;
321 for (k = 7; k >= 0; k--) {
322 *dst++ = ((d >> k) & 1) ? fg : 0;
323 j++;
324 }
325 }
326 }
327 break;
328 }
329 }
330
331 /*
332 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
333 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
334 * the visual format and color depth of the framebuffer, the DAC, the
335 * pseudo_palette, and the logo data will be adjusted accordingly.
336 *
337 * Case 1 - linux_logo_clut224:
338 * Color exceeds the number of console colors (16), thus we set the hardware DAC
339 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
340 *
341 * For visuals that require color info from the pseudo_palette, we also construct
342 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
343 * will be set.
344 *
345 * Case 2 - linux_logo_vga16:
346 * The number of colors just matches the console colors, thus there is no need
347 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
348 * each byte contains color information for two pixels (upper and lower nibble).
349 * To be consistent with fb_imageblit() usage, we therefore separate the two
350 * nibbles into separate bytes. The "depth" flag will be set to 4.
351 *
352 * Case 3 - linux_logo_mono:
353 * This is similar with Case 2. Each byte contains information for 8 pixels.
354 * We isolate each bit and expand each into a byte. The "depth" flag will
355 * be set to 1.
356 */
357 static struct logo_data {
358 int depth;
359 int needs_directpalette;
360 int needs_truepalette;
361 int needs_cmapreset;
362 const struct linux_logo *logo;
363 } fb_logo;
364
365 int fb_prepare_logo(struct fb_info *info)
366 {
367 int depth = fb_get_color_depth(info);
368
369 memset(&fb_logo, 0, sizeof(struct logo_data));
370
371 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
372 depth = info->var.blue.length;
373 if (info->var.red.length < depth)
374 depth = info->var.red.length;
375 if (info->var.green.length < depth)
376 depth = info->var.green.length;
377 }
378
379 if (depth >= 8) {
380 switch (info->fix.visual) {
381 case FB_VISUAL_TRUECOLOR:
382 fb_logo.needs_truepalette = 1;
383 break;
384 case FB_VISUAL_DIRECTCOLOR:
385 fb_logo.needs_directpalette = 1;
386 fb_logo.needs_cmapreset = 1;
387 break;
388 case FB_VISUAL_PSEUDOCOLOR:
389 fb_logo.needs_cmapreset = 1;
390 break;
391 }
392 }
393
394 /* Return if no suitable logo was found */
395 fb_logo.logo = fb_find_logo(depth);
396
397 if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
398 fb_logo.logo = NULL;
399 return 0;
400 }
401 /* What depth we asked for might be different from what we get */
402 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
403 fb_logo.depth = 8;
404 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
405 fb_logo.depth = 4;
406 else
407 fb_logo.depth = 1;
408 return fb_logo.logo->height;
409 }
410
411 int fb_show_logo(struct fb_info *info)
412 {
413 u32 *palette = NULL, *saved_pseudo_palette = NULL;
414 unsigned char *logo_new = NULL;
415 struct fb_image image;
416 int x;
417
418 /* Return if the frame buffer is not mapped or suspended */
419 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
420 return 0;
421
422 image.depth = 8;
423 image.data = fb_logo.logo->data;
424
425 if (fb_logo.needs_cmapreset)
426 fb_set_logocmap(info, fb_logo.logo);
427
428 if (fb_logo.needs_truepalette ||
429 fb_logo.needs_directpalette) {
430 palette = kmalloc(256 * 4, GFP_KERNEL);
431 if (palette == NULL)
432 return 0;
433
434 if (fb_logo.needs_truepalette)
435 fb_set_logo_truepalette(info, fb_logo.logo, palette);
436 else
437 fb_set_logo_directpalette(info, fb_logo.logo, palette);
438
439 saved_pseudo_palette = info->pseudo_palette;
440 info->pseudo_palette = palette;
441 }
442
443 if (fb_logo.depth <= 4) {
444 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
445 GFP_KERNEL);
446 if (logo_new == NULL) {
447 if (palette)
448 kfree(palette);
449 if (saved_pseudo_palette)
450 info->pseudo_palette = saved_pseudo_palette;
451 return 0;
452 }
453 image.data = logo_new;
454 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
455 }
456
457 image.width = fb_logo.logo->width;
458 image.height = fb_logo.logo->height;
459 image.dy = 0;
460
461 for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
462 x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
463 image.dx = x;
464 info->fbops->fb_imageblit(info, &image);
465 }
466
467 if (palette != NULL)
468 kfree(palette);
469 if (saved_pseudo_palette != NULL)
470 info->pseudo_palette = saved_pseudo_palette;
471 if (logo_new != NULL)
472 kfree(logo_new);
473 return fb_logo.logo->height;
474 }
475 #else
476 int fb_prepare_logo(struct fb_info *info) { return 0; }
477 int fb_show_logo(struct fb_info *info) { return 0; }
478 #endif /* CONFIG_LOGO */
479
480 static int fbmem_read_proc(char *buf, char **start, off_t offset,
481 int len, int *eof, void *private)
482 {
483 struct fb_info **fi;
484 int clen;
485
486 clen = 0;
487 for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
488 if (*fi)
489 clen += sprintf(buf + clen, "%d %s\n",
490 (*fi)->node,
491 (*fi)->fix.id);
492 *start = buf + offset;
493 if (clen > offset)
494 clen -= offset;
495 else
496 clen = 0;
497 return clen < len ? clen : len;
498 }
499
500 static ssize_t
501 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
502 {
503 unsigned long p = *ppos;
504 struct inode *inode = file->f_dentry->d_inode;
505 int fbidx = iminor(inode);
506 struct fb_info *info = registered_fb[fbidx];
507 u32 *buffer, *dst, *src;
508 int c, i, cnt = 0, err = 0;
509 unsigned long total_size;
510
511 if (!info || ! info->screen_base)
512 return -ENODEV;
513
514 if (info->state != FBINFO_STATE_RUNNING)
515 return -EPERM;
516
517 if (info->fbops->fb_read)
518 return info->fbops->fb_read(file, buf, count, ppos);
519
520 total_size = info->screen_size;
521 if (total_size == 0)
522 total_size = info->fix.smem_len;
523
524 if (p >= total_size)
525 return 0;
526 if (count >= total_size)
527 count = total_size;
528 if (count + p > total_size)
529 count = total_size - p;
530
531 cnt = 0;
532 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
533 GFP_KERNEL);
534 if (!buffer)
535 return -ENOMEM;
536
537 src = (u32 *) (info->screen_base + p);
538
539 if (info->fbops->fb_sync)
540 info->fbops->fb_sync(info);
541
542 while (count) {
543 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
544 dst = buffer;
545 for (i = c >> 2; i--; )
546 *dst++ = fb_readl(src++);
547 if (c & 3) {
548 u8 *dst8 = (u8 *) dst;
549 u8 *src8 = (u8 *) src;
550
551 for (i = c & 3; i--;)
552 *dst8++ = fb_readb(src8++);
553
554 src = (u32 *) src8;
555 }
556
557 if (copy_to_user(buf, buffer, c)) {
558 err = -EFAULT;
559 break;
560 }
561 *ppos += c;
562 buf += c;
563 cnt += c;
564 count -= c;
565 }
566
567 kfree(buffer);
568 return (err) ? err : cnt;
569 }
570
571 static ssize_t
572 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
573 {
574 unsigned long p = *ppos;
575 struct inode *inode = file->f_dentry->d_inode;
576 int fbidx = iminor(inode);
577 struct fb_info *info = registered_fb[fbidx];
578 u32 *buffer, *dst, *src;
579 int c, i, cnt = 0, err;
580 unsigned long total_size;
581
582 if (!info || !info->screen_base)
583 return -ENODEV;
584
585 if (info->state != FBINFO_STATE_RUNNING)
586 return -EPERM;
587
588 if (info->fbops->fb_write)
589 return info->fbops->fb_write(file, buf, count, ppos);
590
591 total_size = info->screen_size;
592 if (total_size == 0)
593 total_size = info->fix.smem_len;
594
595 if (p > total_size)
596 return -ENOSPC;
597 if (count >= total_size)
598 count = total_size;
599 err = 0;
600 if (count + p > total_size) {
601 count = total_size - p;
602 err = -ENOSPC;
603 }
604 cnt = 0;
605 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
606 GFP_KERNEL);
607 if (!buffer)
608 return -ENOMEM;
609
610 dst = (u32 *) (info->screen_base + p);
611
612 if (info->fbops->fb_sync)
613 info->fbops->fb_sync(info);
614
615 while (count) {
616 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
617 src = buffer;
618 if (copy_from_user(src, buf, c)) {
619 err = -EFAULT;
620 break;
621 }
622 for (i = c >> 2; i--; )
623 fb_writel(*src++, dst++);
624 if (c & 3) {
625 u8 *src8 = (u8 *) src;
626 u8 *dst8 = (u8 *) dst;
627
628 for (i = c & 3; i--; )
629 fb_writeb(*src8++, dst8++);
630
631 dst = (u32 *) dst8;
632 }
633 *ppos += c;
634 buf += c;
635 cnt += c;
636 count -= c;
637 }
638 kfree(buffer);
639
640 return (err) ? err : cnt;
641 }
642
643 #ifdef CONFIG_KMOD
644 static void try_to_load(int fb)
645 {
646 request_module("fb%d", fb);
647 }
648 #endif /* CONFIG_KMOD */
649
650 void
651 fb_load_cursor_image(struct fb_info *info)
652 {
653 unsigned int width = (info->cursor.image.width + 7) >> 3;
654 u8 *data = (u8 *) info->cursor.image.data;
655
656 if (info->sprite.outbuf)
657 info->sprite.outbuf(info, info->sprite.addr, data, width);
658 else
659 memcpy(info->sprite.addr, data, width);
660 }
661
662 int
663 fb_cursor(struct fb_info *info, struct fb_cursor_user __user *sprite)
664 {
665 struct fb_cursor_user cursor_user;
666 struct fb_cursor cursor;
667 char *data = NULL, *mask = NULL, *info_mask = NULL;
668 u16 *red = NULL, *green = NULL, *blue = NULL, *transp = NULL;
669 int err = -EINVAL;
670
671 if (copy_from_user(&cursor_user, sprite, sizeof(struct fb_cursor_user)))
672 return -EFAULT;
673
674 memcpy(&cursor, &cursor_user, sizeof(cursor_user));
675 cursor.mask = info->cursor.mask;
676 cursor.image.data = info->cursor.image.data;
677 cursor.image.cmap.red = info->cursor.image.cmap.red;
678 cursor.image.cmap.green = info->cursor.image.cmap.green;
679 cursor.image.cmap.blue = info->cursor.image.cmap.blue;
680 cursor.image.cmap.transp = info->cursor.image.cmap.transp;
681 cursor.data = NULL;
682
683 if (cursor.set & FB_CUR_SETCUR)
684 info->cursor.enable = 1;
685
686 if (cursor.set & FB_CUR_SETCMAP) {
687 unsigned len = cursor.image.cmap.len;
688 if ((int)len <= 0)
689 goto out;
690 len *= 2;
691 err = -ENOMEM;
692 red = kmalloc(len, GFP_USER);
693 green = kmalloc(len, GFP_USER);
694 blue = kmalloc(len, GFP_USER);
695 if (!red || !green || !blue)
696 goto out;
697 if (cursor_user.image.cmap.transp) {
698 transp = kmalloc(len, GFP_USER);
699 if (!transp)
700 goto out;
701 }
702 err = -EFAULT;
703 if (copy_from_user(red, cursor_user.image.cmap.red, len))
704 goto out;
705 if (copy_from_user(green, cursor_user.image.cmap.green, len))
706 goto out;
707 if (copy_from_user(blue, cursor_user.image.cmap.blue, len))
708 goto out;
709 if (transp) {
710 if (copy_from_user(transp,
711 cursor_user.image.cmap.transp, len))
712 goto out;
713 }
714 cursor.image.cmap.red = red;
715 cursor.image.cmap.green = green;
716 cursor.image.cmap.blue = blue;
717 cursor.image.cmap.transp = transp;
718 }
719
720 if (cursor.set & FB_CUR_SETSHAPE) {
721 int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;
722
723 if ((cursor.image.height != info->cursor.image.height) ||
724 (cursor.image.width != info->cursor.image.width))
725 cursor.set |= FB_CUR_SETSIZE;
726
727 err = -ENOMEM;
728 data = kmalloc(size, GFP_USER);
729 mask = kmalloc(size, GFP_USER);
730 if (!mask || !data)
731 goto out;
732
733 err = -EFAULT;
734 if (copy_from_user(data, cursor_user.image.data, size) ||
735 copy_from_user(mask, cursor_user.mask, size))
736 goto out;
737
738 cursor.image.data = data;
739 cursor.mask = mask;
740 info_mask = (char *) info->cursor.mask;
741 info->cursor.mask = mask;
742 }
743 info->cursor.set = cursor.set;
744 info->cursor.rop = cursor.rop;
745 err = info->fbops->fb_cursor(info, &cursor);
746 out:
747 kfree(data);
748 kfree(mask);
749 kfree(red);
750 kfree(green);
751 kfree(blue);
752 kfree(transp);
753 if (info_mask)
754 info->cursor.mask = info_mask;
755 return err;
756 }
757
758 int
759 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
760 {
761 int xoffset = var->xoffset;
762 int yoffset = var->yoffset;
763 int err;
764
765 if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
766 xoffset + info->var.xres > info->var.xres_virtual ||
767 yoffset + info->var.yres > info->var.yres_virtual)
768 return -EINVAL;
769 if ((err = info->fbops->fb_pan_display(var, info)))
770 return err;
771 info->var.xoffset = var->xoffset;
772 info->var.yoffset = var->yoffset;
773 if (var->vmode & FB_VMODE_YWRAP)
774 info->var.vmode |= FB_VMODE_YWRAP;
775 else
776 info->var.vmode &= ~FB_VMODE_YWRAP;
777 return 0;
778 }
779
780 int
781 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
782 {
783 int err;
784
785 if (var->activate & FB_ACTIVATE_INV_MODE) {
786 struct fb_videomode mode1, mode2;
787 int ret = 0;
788
789 fb_var_to_videomode(&mode1, var);
790 fb_var_to_videomode(&mode2, &info->var);
791 /* make sure we don't delete the videomode of current var */
792 ret = fb_mode_is_equal(&mode1, &mode2);
793
794 if (!ret) {
795 struct fb_event event;
796
797 event.info = info;
798 event.data = &mode1;
799 ret = notifier_call_chain(&fb_notifier_list,
800 FB_EVENT_MODE_DELETE, &event);
801 }
802
803 if (!ret)
804 fb_delete_videomode(&mode1, &info->modelist);
805
806 return ret;
807 }
808
809 if ((var->activate & FB_ACTIVATE_FORCE) ||
810 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
811 if (!info->fbops->fb_check_var) {
812 *var = info->var;
813 return 0;
814 }
815
816 if ((err = info->fbops->fb_check_var(var, info)))
817 return err;
818
819 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
820 struct fb_videomode mode;
821 info->var = *var;
822
823 if (info->fbops->fb_set_par)
824 info->fbops->fb_set_par(info);
825
826 fb_pan_display(info, &info->var);
827
828 fb_set_cmap(&info->cmap, info);
829
830 fb_var_to_videomode(&mode, &info->var);
831 fb_add_videomode(&mode, &info->modelist);
832
833 if (info->flags & FBINFO_MISC_MODECHANGEUSER) {
834 struct fb_event event;
835
836 info->flags &= ~FBINFO_MISC_MODECHANGEUSER;
837 event.info = info;
838 notifier_call_chain(&fb_notifier_list,
839 FB_EVENT_MODE_CHANGE, &event);
840 }
841 }
842 }
843 return 0;
844 }
845
846 int
847 fb_blank(struct fb_info *info, int blank)
848 {
849 /* ??? Variable sized stack allocation. */
850 u16 black[info->cmap.len];
851 struct fb_cmap cmap;
852
853 if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
854 return 0;
855 if (blank) {
856 memset(black, 0, info->cmap.len * sizeof(u16));
857 cmap.red = cmap.green = cmap.blue = black;
858 cmap.transp = info->cmap.transp ? black : NULL;
859 cmap.start = info->cmap.start;
860 cmap.len = info->cmap.len;
861 } else
862 cmap = info->cmap;
863 return fb_set_cmap(&cmap, info);
864 }
865
866 static int
867 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
868 unsigned long arg)
869 {
870 int fbidx = iminor(inode);
871 struct fb_info *info = registered_fb[fbidx];
872 struct fb_ops *fb = info->fbops;
873 struct fb_var_screeninfo var;
874 struct fb_fix_screeninfo fix;
875 struct fb_con2fbmap con2fb;
876 struct fb_cmap_user cmap;
877 struct fb_event event;
878 void __user *argp = (void __user *)arg;
879 int i;
880
881 if (!fb)
882 return -ENODEV;
883 switch (cmd) {
884 case FBIOGET_VSCREENINFO:
885 return copy_to_user(argp, &info->var,
886 sizeof(var)) ? -EFAULT : 0;
887 case FBIOPUT_VSCREENINFO:
888 if (copy_from_user(&var, argp, sizeof(var)))
889 return -EFAULT;
890 acquire_console_sem();
891 info->flags |= FBINFO_MISC_MODECHANGEUSER;
892 i = fb_set_var(info, &var);
893 info->flags &= ~FBINFO_MISC_MODECHANGEUSER;
894 release_console_sem();
895 if (i) return i;
896 if (copy_to_user(argp, &var, sizeof(var)))
897 return -EFAULT;
898 return 0;
899 case FBIOGET_FSCREENINFO:
900 return copy_to_user(argp, &info->fix,
901 sizeof(fix)) ? -EFAULT : 0;
902 case FBIOPUTCMAP:
903 if (copy_from_user(&cmap, argp, sizeof(cmap)))
904 return -EFAULT;
905 return (fb_set_user_cmap(&cmap, info));
906 case FBIOGETCMAP:
907 if (copy_from_user(&cmap, argp, sizeof(cmap)))
908 return -EFAULT;
909 return fb_cmap_to_user(&info->cmap, &cmap);
910 case FBIOPAN_DISPLAY:
911 if (copy_from_user(&var, argp, sizeof(var)))
912 return -EFAULT;
913 acquire_console_sem();
914 i = fb_pan_display(info, &var);
915 release_console_sem();
916 if (i)
917 return i;
918 if (copy_to_user(argp, &var, sizeof(var)))
919 return -EFAULT;
920 return 0;
921 case FBIO_CURSOR:
922 acquire_console_sem();
923 i = fb_cursor(info, argp);
924 release_console_sem();
925 return i;
926 case FBIOGET_CON2FBMAP:
927 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
928 return -EFAULT;
929 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
930 return -EINVAL;
931 con2fb.framebuffer = -1;
932 event.info = info;
933 event.data = &con2fb;
934 notifier_call_chain(&fb_notifier_list,
935 FB_EVENT_GET_CONSOLE_MAP, &event);
936 return copy_to_user(argp, &con2fb,
937 sizeof(con2fb)) ? -EFAULT : 0;
938 case FBIOPUT_CON2FBMAP:
939 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
940 return - EFAULT;
941 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
942 return -EINVAL;
943 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
944 return -EINVAL;
945 #ifdef CONFIG_KMOD
946 if (!registered_fb[con2fb.framebuffer])
947 try_to_load(con2fb.framebuffer);
948 #endif /* CONFIG_KMOD */
949 if (!registered_fb[con2fb.framebuffer])
950 return -EINVAL;
951 if (con2fb.console > 0 && con2fb.console < MAX_NR_CONSOLES) {
952 event.info = info;
953 event.data = &con2fb;
954 return notifier_call_chain(&fb_notifier_list,
955 FB_EVENT_SET_CONSOLE_MAP,
956 &event);
957 }
958 return -EINVAL;
959 case FBIOBLANK:
960 acquire_console_sem();
961 i = fb_blank(info, arg);
962 release_console_sem();
963 return i;
964 default:
965 if (fb->fb_ioctl == NULL)
966 return -EINVAL;
967 return fb->fb_ioctl(inode, file, cmd, arg, info);
968 }
969 }
970
971 static int
972 fb_mmap(struct file *file, struct vm_area_struct * vma)
973 {
974 int fbidx = iminor(file->f_dentry->d_inode);
975 struct fb_info *info = registered_fb[fbidx];
976 struct fb_ops *fb = info->fbops;
977 unsigned long off;
978 #if !defined(__sparc__) || defined(__sparc_v9__)
979 unsigned long start;
980 u32 len;
981 #endif
982
983 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
984 return -EINVAL;
985 off = vma->vm_pgoff << PAGE_SHIFT;
986 if (!fb)
987 return -ENODEV;
988 if (fb->fb_mmap) {
989 int res;
990 lock_kernel();
991 res = fb->fb_mmap(info, file, vma);
992 unlock_kernel();
993 return res;
994 }
995
996 #if defined(__sparc__) && !defined(__sparc_v9__)
997 /* Should never get here, all fb drivers should have their own
998 mmap routines */
999 return -EINVAL;
1000 #else
1001 /* !sparc32... */
1002 lock_kernel();
1003
1004 /* frame buffer memory */
1005 start = info->fix.smem_start;
1006 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1007 if (off >= len) {
1008 /* memory mapped io */
1009 off -= len;
1010 if (info->var.accel_flags) {
1011 unlock_kernel();
1012 return -EINVAL;
1013 }
1014 start = info->fix.mmio_start;
1015 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1016 }
1017 unlock_kernel();
1018 start &= PAGE_MASK;
1019 if ((vma->vm_end - vma->vm_start + off) > len)
1020 return -EINVAL;
1021 off += start;
1022 vma->vm_pgoff = off >> PAGE_SHIFT;
1023 /* This is an IO map - tell maydump to skip this VMA */
1024 vma->vm_flags |= VM_IO;
1025 #if defined(__sparc_v9__)
1026 vma->vm_flags |= (VM_SHM | VM_LOCKED);
1027 if (io_remap_page_range(vma, vma->vm_start, off,
1028 vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
1029 return -EAGAIN;
1030 #else
1031 #if defined(__mc68000__)
1032 #if defined(CONFIG_SUN3)
1033 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1034 #elif defined(CONFIG_MMU)
1035 if (CPU_IS_020_OR_030)
1036 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1037 if (CPU_IS_040_OR_060) {
1038 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1039 /* Use no-cache mode, serialized */
1040 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1041 }
1042 #endif
1043 #elif defined(__powerpc__)
1044 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
1045 #elif defined(__alpha__)
1046 /* Caching is off in the I/O space quadrant by design. */
1047 #elif defined(__i386__) || defined(__x86_64__)
1048 if (boot_cpu_data.x86 > 3)
1049 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1050 #elif defined(__mips__)
1051 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1052 #elif defined(__hppa__)
1053 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1054 #elif defined(__ia64__) || defined(__arm__) || defined(__sh__)
1055 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1056 #else
1057 #warning What do we have to do here??
1058 #endif
1059 if (io_remap_page_range(vma, vma->vm_start, off,
1060 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1061 return -EAGAIN;
1062 #endif /* !__sparc_v9__ */
1063 return 0;
1064 #endif /* !sparc32 */
1065 }
1066
1067 static int
1068 fb_open(struct inode *inode, struct file *file)
1069 {
1070 int fbidx = iminor(inode);
1071 struct fb_info *info;
1072 int res = 0;
1073
1074 if (fbidx >= FB_MAX)
1075 return -ENODEV;
1076 #ifdef CONFIG_KMOD
1077 if (!(info = registered_fb[fbidx]))
1078 try_to_load(fbidx);
1079 #endif /* CONFIG_KMOD */
1080 if (!(info = registered_fb[fbidx]))
1081 return -ENODEV;
1082 if (!try_module_get(info->fbops->owner))
1083 return -ENODEV;
1084 if (info->fbops->fb_open) {
1085 res = info->fbops->fb_open(info,1);
1086 if (res)
1087 module_put(info->fbops->owner);
1088 }
1089 return res;
1090 }
1091
1092 static int
1093 fb_release(struct inode *inode, struct file *file)
1094 {
1095 int fbidx = iminor(inode);
1096 struct fb_info *info;
1097
1098 lock_kernel();
1099 info = registered_fb[fbidx];
1100 if (info->fbops->fb_release)
1101 info->fbops->fb_release(info,1);
1102 module_put(info->fbops->owner);
1103 unlock_kernel();
1104 return 0;
1105 }
1106
1107 static struct file_operations fb_fops = {
1108 .owner = THIS_MODULE,
1109 .read = fb_read,
1110 .write = fb_write,
1111 .ioctl = fb_ioctl,
1112 .mmap = fb_mmap,
1113 .open = fb_open,
1114 .release = fb_release,
1115 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1116 .get_unmapped_area = get_fb_unmapped_area,
1117 #endif
1118 };
1119
1120 static struct class_simple *fb_class;
1121
1122 /**
1123 * register_framebuffer - registers a frame buffer device
1124 * @fb_info: frame buffer info structure
1125 *
1126 * Registers a frame buffer device @fb_info.
1127 *
1128 * Returns negative errno on error, or zero for success.
1129 *
1130 */
1131
1132 int
1133 register_framebuffer(struct fb_info *fb_info)
1134 {
1135 int i;
1136 struct class_device *c;
1137 struct fb_event event;
1138
1139 if (num_registered_fb == FB_MAX)
1140 return -ENXIO;
1141 num_registered_fb++;
1142 for (i = 0 ; i < FB_MAX; i++)
1143 if (!registered_fb[i])
1144 break;
1145 fb_info->node = i;
1146
1147 c = class_simple_device_add(fb_class, MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1148 if (IS_ERR(c)) {
1149 /* Not fatal */
1150 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(c));
1151 }
1152
1153 if (fb_info->pixmap.addr == NULL) {
1154 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1155 if (fb_info->pixmap.addr) {
1156 fb_info->pixmap.size = FBPIXMAPSIZE;
1157 fb_info->pixmap.buf_align = 1;
1158 fb_info->pixmap.scan_align = 1;
1159 fb_info->pixmap.access_align = 4;
1160 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1161 }
1162 }
1163 fb_info->pixmap.offset = 0;
1164
1165 if (fb_info->sprite.addr == NULL) {
1166 fb_info->sprite.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1167 if (fb_info->sprite.addr) {
1168 fb_info->sprite.size = FBPIXMAPSIZE;
1169 fb_info->sprite.buf_align = 1;
1170 fb_info->sprite.scan_align = 1;
1171 fb_info->sprite.access_align = 4;
1172 fb_info->sprite.flags = FB_PIXMAP_DEFAULT;
1173 }
1174 }
1175 fb_info->sprite.offset = 0;
1176
1177 if (!fb_info->modelist.prev ||
1178 !fb_info->modelist.next ||
1179 list_empty(&fb_info->modelist)) {
1180 struct fb_videomode mode;
1181
1182 INIT_LIST_HEAD(&fb_info->modelist);
1183 fb_var_to_videomode(&mode, &fb_info->var);
1184 fb_add_videomode(&mode, &fb_info->modelist);
1185 }
1186
1187 registered_fb[i] = fb_info;
1188
1189 devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1190 S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1191 event.info = fb_info;
1192 notifier_call_chain(&fb_notifier_list,
1193 FB_EVENT_FB_REGISTERED, &event);
1194 return 0;
1195 }
1196
1197
1198 /**
1199 * unregister_framebuffer - releases a frame buffer device
1200 * @fb_info: frame buffer info structure
1201 *
1202 * Unregisters a frame buffer device @fb_info.
1203 *
1204 * Returns negative errno on error, or zero for success.
1205 *
1206 */
1207
1208 int
1209 unregister_framebuffer(struct fb_info *fb_info)
1210 {
1211 int i;
1212
1213 i = fb_info->node;
1214 if (!registered_fb[i])
1215 return -EINVAL;
1216 devfs_remove("fb/%d", i);
1217
1218 if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1219 kfree(fb_info->pixmap.addr);
1220 if (fb_info->sprite.addr && (fb_info->sprite.flags & FB_PIXMAP_DEFAULT))
1221 kfree(fb_info->sprite.addr);
1222 fb_destroy_modelist(&fb_info->modelist);
1223 registered_fb[i]=NULL;
1224 num_registered_fb--;
1225 class_simple_device_remove(MKDEV(FB_MAJOR, i));
1226 return 0;
1227 }
1228
1229 /**
1230 * fb_register_client - register a client notifier
1231 * @nb: notifier block to callback on events
1232 */
1233 int fb_register_client(struct notifier_block *nb)
1234 {
1235 return notifier_chain_register(&fb_notifier_list, nb);
1236 }
1237
1238 /**
1239 * fb_unregister_client - unregister a client notifier
1240 * @nb: notifier block to callback on events
1241 */
1242 int fb_unregister_client(struct notifier_block *nb)
1243 {
1244 return notifier_chain_unregister(&fb_notifier_list, nb);
1245 }
1246
1247 /**
1248 * fb_set_suspend - low level driver signals suspend
1249 * @info: framebuffer affected
1250 * @state: 0 = resuming, !=0 = suspending
1251 *
1252 * This is meant to be used by low level drivers to
1253 * signal suspend/resume to the core & clients.
1254 * It must be called with the console semaphore held
1255 */
1256 void fb_set_suspend(struct fb_info *info, int state)
1257 {
1258 struct fb_event event;
1259
1260 event.info = info;
1261 if (state) {
1262 notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event);
1263 info->state = FBINFO_STATE_SUSPENDED;
1264 } else {
1265 info->state = FBINFO_STATE_RUNNING;
1266 notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event);
1267 }
1268 }
1269
1270 /**
1271 * fbmem_init - init frame buffer subsystem
1272 *
1273 * Initialize the frame buffer subsystem.
1274 *
1275 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1276 *
1277 */
1278
1279 int __init
1280 fbmem_init(void)
1281 {
1282 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1283
1284 devfs_mk_dir("fb");
1285 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1286 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1287
1288 fb_class = class_simple_create(THIS_MODULE, "graphics");
1289 if (IS_ERR(fb_class)) {
1290 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1291 fb_class = NULL;
1292 }
1293 return 0;
1294 }
1295 module_init(fbmem_init);
1296
1297 #define NR_FB_DRIVERS 64
1298 static char *video_options[NR_FB_DRIVERS];
1299 static int ofonly;
1300
1301 /**
1302 * fb_get_options - get kernel boot parameters
1303 * @name - framebuffer name as it would appear in
1304 * the boot parameter line
1305 * (video=<name>:<options>)
1306 *
1307 * NOTE: Needed to maintain backwards compatibility
1308 */
1309 int fb_get_options(char *name, char **option)
1310 {
1311 char *opt, *options = NULL;
1312 int opt_len, retval = 0;
1313 int name_len = strlen(name), i;
1314
1315 if (name_len && ofonly && strncmp(name, "offb", 4))
1316 retval = 1;
1317
1318 if (name_len && !retval) {
1319 for (i = 0; i < NR_FB_DRIVERS; i++) {
1320 if (video_options[i] == NULL)
1321 continue;
1322 opt_len = strlen(video_options[i]);
1323 if (!opt_len)
1324 continue;
1325 opt = video_options[i];
1326 if (!strncmp(name, opt, name_len) &&
1327 opt[name_len] == ':')
1328 options = opt + name_len + 1;
1329 }
1330 }
1331 if (options && !strncmp(options, "off", 3))
1332 retval = 1;
1333
1334 if (option)
1335 *option = options;
1336
1337 return retval;
1338 }
1339
1340 /**
1341 * video_setup - process command line options
1342 * @options: string of options
1343 *
1344 * Process command line options for frame buffer subsystem.
1345 *
1346 * NOTE: This function is a __setup and __init function.
1347 * It only stores the options. Drivers have to call
1348 * fb_get_options() as necessary.
1349 *
1350 * Returns zero.
1351 *
1352 */
1353
1354 int __init video_setup(char *options)
1355 {
1356 int i;
1357
1358 if (!options || !*options)
1359 return 0;
1360
1361 for (i = 0; i < NR_FB_DRIVERS; i++) {
1362 if (!strncmp(options, "ofonly", 6))
1363 ofonly = 1;
1364 if (video_options[i] == NULL) {
1365 video_options[i] = options;
1366 break;
1367 }
1368 }
1369
1370 return 0;
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(fb_iomove_buf_unaligned);
1389 EXPORT_SYMBOL(fb_iomove_buf_aligned);
1390 EXPORT_SYMBOL(fb_sysmove_buf_unaligned);
1391 EXPORT_SYMBOL(fb_sysmove_buf_aligned);
1392 EXPORT_SYMBOL(fb_load_cursor_image);
1393 EXPORT_SYMBOL(fb_set_suspend);
1394 EXPORT_SYMBOL(fb_register_client);
1395 EXPORT_SYMBOL(fb_unregister_client);
1396 EXPORT_SYMBOL(fb_get_options);
1397
1398 MODULE_LICENSE("GPL");
MOXA 2.6.9 from sdlinux-moxaart.tgz