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drivers/video/sis/: remove more kernel 2.4 code
[GitHub/LineageOS/android_kernel_samsung_universal7580.git] / drivers / video / fbmem.c
CommitLineData
1da177e4
LT		 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
1da177e4
LT		 14#include <linux/module.h>
15
c7f82d9c 16#include <linux/compat.h>
1da177e4
LT		 17#include <linux/types.h>
18#include <linux/errno.h>
1da177e4
LT		 19#include <linux/smp_lock.h>
20#include <linux/kernel.h>
21#include <linux/major.h>
22#include <linux/slab.h>
23#include <linux/mm.h>
24#include <linux/mman.h>
a8f340e3 25#include <linux/vt.h>
1da177e4
LT		 26#include <linux/init.h>
27#include <linux/linux_logo.h>
28#include <linux/proc_fs.h>
29#include <linux/console.h>
30#ifdef CONFIG_KMOD
31#include <linux/kmod.h>
32#endif
1da177e4 33#include <linux/err.h>
1da177e4
LT		 34#include <linux/device.h>
35#include <linux/efi.h>
36
37#if defined(__mc68000__) || defined(CONFIG_APUS)
38#include <asm/setup.h>
39#endif
40
41#include <asm/io.h>
42#include <asm/uaccess.h>
43#include <asm/page.h>
44#include <asm/pgtable.h>
45
46#include <linux/fb.h>
47
48 /*
49 * Frame buffer device initialization and setup routines
50 */
51
52#define FBPIXMAPSIZE (1024 * 8)
53
0128beee
HD		 54struct fb_info *registered_fb[FB_MAX] __read_mostly;
55int num_registered_fb __read_mostly;
1da177e4
LT		 56
57/*
58 * Helpers
59 */
60
b8c90945
AD		 61int fb_get_color_depth(struct fb_var_screeninfo *var,
62 struct fb_fix_screeninfo *fix)
1da177e4 63{
b8c90945
AD		 64 int depth = 0;
65
66 if (fix->visual == FB_VISUAL_MONO01 ||
67 fix->visual == FB_VISUAL_MONO10)
68 depth = 1;
69 else {
70 if (var->green.length == var->blue.length &&
71 var->green.length == var->red.length &&
72 var->green.offset == var->blue.offset &&
73 var->green.offset == var->red.offset)
74 depth = var->green.length;
75 else
76 depth = var->green.length + var->red.length +
77 var->blue.length;
78 }
79
80 return depth;
1da177e4
LT		 81}
82EXPORT_SYMBOL(fb_get_color_depth);
83
84/*
f5a9951c 85 * Data padding functions.
1da177e4 86 */
f1ab5dac 87void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
1da177e4 88{
829e79b6 89 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
1da177e4 90}
f1ab5dac 91EXPORT_SYMBOL(fb_pad_aligned_buffer);
1da177e4 92
f1ab5dac
JS		 93void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
94 u32 shift_high, u32 shift_low, u32 mod)
1da177e4
LT		 95{
96 u8 mask = (u8) (0xfff << shift_high), tmp;
97 int i, j;
98
99 for (i = height; i--; ) {
100 for (j = 0; j < idx; j++) {
101 tmp = dst[j];
102 tmp &= mask;
103 tmp |= *src >> shift_low;
104 dst[j] = tmp;
105 tmp = *src << shift_high;
106 dst[j+1] = tmp;
107 src++;
108 }
109 tmp = dst[idx];
110 tmp &= mask;
111 tmp |= *src >> shift_low;
112 dst[idx] = tmp;
113 if (shift_high < mod) {
114 tmp = *src << shift_high;
115 dst[idx+1] = tmp;
116 }
117 src++;
118 dst += d_pitch;
119 }
120}
f1ab5dac 121EXPORT_SYMBOL(fb_pad_unaligned_buffer);
1da177e4
LT		 122
123/*
124 * we need to lock this section since fb_cursor
125 * may use fb_imageblit()
126 */
127char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
128{
129 u32 align = buf->buf_align - 1, offset;
130 char *addr = buf->addr;
131
132 /* If IO mapped, we need to sync before access, no sharing of
133 * the pixmap is done
134 */
135 if (buf->flags & FB_PIXMAP_IO) {
136 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
137 info->fbops->fb_sync(info);
138 return addr;
139 }
140
141 /* See if we fit in the remaining pixmap space */
142 offset = buf->offset + align;
143 offset &= ~align;
144 if (offset + size > buf->size) {
145 /* We do not fit. In order to be able to re-use the buffer,
146 * we must ensure no asynchronous DMA'ing or whatever operation
147 * is in progress, we sync for that.
148 */
149 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
150 info->fbops->fb_sync(info);
151 offset = 0;
152 }
153 buf->offset = offset + size;
154 addr += offset;
155
156 return addr;
157}
158
159#ifdef CONFIG_LOGO
1da177e4
LT		 160
161static inline unsigned safe_shift(unsigned d, int n)
162{
163 return n < 0 ? d >> -n : d << n;
164}
165
166static void fb_set_logocmap(struct fb_info *info,
167 const struct linux_logo *logo)
168{
169 struct fb_cmap palette_cmap;
170 u16 palette_green[16];
171 u16 palette_blue[16];
172 u16 palette_red[16];
173 int i, j, n;
174 const unsigned char *clut = logo->clut;
175
176 palette_cmap.start = 0;
177 palette_cmap.len = 16;
178 palette_cmap.red = palette_red;
179 palette_cmap.green = palette_green;
180 palette_cmap.blue = palette_blue;
181 palette_cmap.transp = NULL;
182
183 for (i = 0; i < logo->clutsize; i += n) {
184 n = logo->clutsize - i;
185 /* palette_cmap provides space for only 16 colors at once */
186 if (n > 16)
187 n = 16;
188 palette_cmap.start = 32 + i;
189 palette_cmap.len = n;
190 for (j = 0; j < n; ++j) {
191 palette_cmap.red[j] = clut[0] << 8 | clut[0];
192 palette_cmap.green[j] = clut[1] << 8 | clut[1];
193 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
194 clut += 3;
195 }
196 fb_set_cmap(&palette_cmap, info);
197 }
198}
199
200static void fb_set_logo_truepalette(struct fb_info *info,
201 const struct linux_logo *logo,
202 u32 *palette)
203{
0128beee 204 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
1da177e4
LT		 205 unsigned char redmask, greenmask, bluemask;
206 int redshift, greenshift, blueshift;
207 int i;
208 const unsigned char *clut = logo->clut;
209
210 /*
211 * We have to create a temporary palette since console palette is only
212 * 16 colors long.
213 */
214 /* Bug: Doesn't obey msb_right ... (who needs that?) */
215 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
216 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
217 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
218 redshift = info->var.red.offset - (8 - info->var.red.length);
219 greenshift = info->var.green.offset - (8 - info->var.green.length);
220 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
221
222 for ( i = 0; i < logo->clutsize; i++) {
223 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
224 safe_shift((clut[1] & greenmask), greenshift) |
225 safe_shift((clut[2] & bluemask), blueshift));
226 clut += 3;
227 }
228}
229
230static void fb_set_logo_directpalette(struct fb_info *info,
231 const struct linux_logo *logo,
232 u32 *palette)
233{
234 int redshift, greenshift, blueshift;
235 int i;
236
237 redshift = info->var.red.offset;
238 greenshift = info->var.green.offset;
239 blueshift = info->var.blue.offset;
240
241 for (i = 32; i < logo->clutsize; i++)
242 palette[i] = i << redshift | i << greenshift | i << blueshift;
243}
244
245static void fb_set_logo(struct fb_info *info,
246 const struct linux_logo *logo, u8 *dst,
247 int depth)
248{
b8c90945 249 int i, j, k;
1da177e4 250 const u8 *src = logo->data;
b8c90945
AD		 251 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
252 u8 fg = 1, d;
1da177e4 253
b8c90945 254 if (fb_get_color_depth(&info->var, &info->fix) == 3)
1da177e4
LT		 255 fg = 7;
256
b8c90945
AD		 257 if (info->fix.visual == FB_VISUAL_MONO01 ||
258 info->fix.visual == FB_VISUAL_MONO10)
259 fg = ~((u8) (0xfff << info->var.green.length));
260
1da177e4
LT		 261 switch (depth) {
262 case 4:
263 for (i = 0; i < logo->height; i++)
264 for (j = 0; j < logo->width; src++) {
265 *dst++ = *src >> 4;
266 j++;
267 if (j < logo->width) {
268 *dst++ = *src & 0x0f;
269 j++;
270 }
271 }
272 break;
273 case 1:
274 for (i = 0; i < logo->height; i++) {
275 for (j = 0; j < logo->width; src++) {
276 d = *src ^ xor;
277 for (k = 7; k >= 0; k--) {
278 *dst++ = ((d >> k) & 1) ? fg : 0;
279 j++;
280 }
281 }
282 }
283 break;
284 }
285}
286
287/*
288 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
289 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
290 * the visual format and color depth of the framebuffer, the DAC, the
291 * pseudo_palette, and the logo data will be adjusted accordingly.
292 *
293 * Case 1 - linux_logo_clut224:
294 * Color exceeds the number of console colors (16), thus we set the hardware DAC
295 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
296 *
297 * For visuals that require color info from the pseudo_palette, we also construct
298 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
299 * will be set.
300 *
301 * Case 2 - linux_logo_vga16:
302 * The number of colors just matches the console colors, thus there is no need
303 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
304 * each byte contains color information for two pixels (upper and lower nibble).
305 * To be consistent with fb_imageblit() usage, we therefore separate the two
306 * nibbles into separate bytes. The "depth" flag will be set to 4.
307 *
308 * Case 3 - linux_logo_mono:
309 * This is similar with Case 2. Each byte contains information for 8 pixels.
310 * We isolate each bit and expand each into a byte. The "depth" flag will
311 * be set to 1.
312 */
313static struct logo_data {
314 int depth;
315 int needs_directpalette;
316 int needs_truepalette;
317 int needs_cmapreset;
318 const struct linux_logo *logo;
0128beee 319} fb_logo __read_mostly;
1da177e4 320
9c44e5f6
AD		 321static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
322{
323 u32 size = width * height, i;
324
325 out += size - 1;
326
327 for (i = size; i--; )
328 *out-- = *in++;
329}
330
331static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
332{
f837e6f7 333 int i, j, h = height - 1;
9c44e5f6
AD		 334
335 for (i = 0; i < height; i++)
336 for (j = 0; j < width; j++)
f837e6f7 337 out[height * j + h - i] = *in++;
9c44e5f6
AD		 338}
339
340static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
341{
342 int i, j, w = width - 1;
343
344 for (i = 0; i < height; i++)
345 for (j = 0; j < width; j++)
346 out[height * (w - j) + i] = *in++;
347}
348
349static void fb_rotate_logo(struct fb_info *info, u8 *dst,
350 struct fb_image *image, int rotate)
351{
352 u32 tmp;
353
354 if (rotate == FB_ROTATE_UD) {
9c44e5f6
AD		 355 fb_rotate_logo_ud(image->data, dst, image->width,
356 image->height);
abed5d15
GU		 357 image->dx = info->var.xres - image->width - image->dx;
358 image->dy = info->var.yres - image->height - image->dy;
9c44e5f6 359 } else if (rotate == FB_ROTATE_CW) {
9c44e5f6
AD		 360 fb_rotate_logo_cw(image->data, dst, image->width,
361 image->height);
9c44e5f6
AD		 362 tmp = image->width;
363 image->width = image->height;
364 image->height = tmp;
abed5d15
GU		 365 tmp = image->dy;
366 image->dy = image->dx;
367 image->dx = info->var.xres - image->width - tmp;
f837e6f7 368 } else if (rotate == FB_ROTATE_CCW) {
9c44e5f6
AD		 369 fb_rotate_logo_ccw(image->data, dst, image->width,
370 image->height);
f837e6f7
AD		 371 tmp = image->width;
372 image->width = image->height;
373 image->height = tmp;
abed5d15
GU		 374 tmp = image->dx;
375 image->dx = image->dy;
376 image->dy = info->var.yres - image->height - tmp;
9c44e5f6
AD		 377 }
378
379 image->data = dst;
380}
381
382static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
448d4797 383 int rotate, unsigned int num)
9c44e5f6 384{
448d4797 385 unsigned int x;
9c44e5f6
AD		 386
387 if (rotate == FB_ROTATE_UR) {
448d4797
GU		 388 for (x = 0;
389 x < num && image->dx + image->width <= info->var.xres;
390 x++) {
9c44e5f6 391 info->fbops->fb_imageblit(info, image);
448d4797 392 image->dx += image->width + 8;
9c44e5f6
AD		 393 }
394 } else if (rotate == FB_ROTATE_UD) {
448d4797 395 for (x = 0; x < num && image->dx >= 0; x++) {
9c44e5f6 396 info->fbops->fb_imageblit(info, image);
448d4797 397 image->dx -= image->width + 8;
9c44e5f6
AD		 398 }
399 } else if (rotate == FB_ROTATE_CW) {
448d4797
GU		 400 for (x = 0;
401 x < num && image->dy + image->height <= info->var.yres;
402 x++) {
9c44e5f6 403 info->fbops->fb_imageblit(info, image);
448d4797 404 image->dy += image->height + 8;
9c44e5f6
AD		 405 }
406 } else if (rotate == FB_ROTATE_CCW) {
448d4797 407 for (x = 0; x < num && image->dy >= 0; x++) {
9c44e5f6 408 info->fbops->fb_imageblit(info, image);
448d4797 409 image->dy -= image->height + 8;
9c44e5f6
AD		 410 }
411 }
412}
413
414int fb_prepare_logo(struct fb_info *info, int rotate)
1da177e4 415{
b8c90945 416 int depth = fb_get_color_depth(&info->var, &info->fix);
9c44e5f6 417 int yres;
1da177e4
LT		 418
419 memset(&fb_logo, 0, sizeof(struct logo_data));
420
70802c60
AD		 421 if (info->flags & FBINFO_MISC_TILEBLITTING ||
422 info->flags & FBINFO_MODULE)
1da177e4
LT		 423 return 0;
424
425 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
426 depth = info->var.blue.length;
427 if (info->var.red.length < depth)
428 depth = info->var.red.length;
429 if (info->var.green.length < depth)
430 depth = info->var.green.length;
431 }
432
0c683dbf 433 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
397eeab3
AD		 434 /* assume console colormap */
435 depth = 4;
436 }
437
1da177e4
LT		 438 if (depth >= 8) {
439 switch (info->fix.visual) {
440 case FB_VISUAL_TRUECOLOR:
441 fb_logo.needs_truepalette = 1;
442 break;
443 case FB_VISUAL_DIRECTCOLOR:
444 fb_logo.needs_directpalette = 1;
445 fb_logo.needs_cmapreset = 1;
446 break;
447 case FB_VISUAL_PSEUDOCOLOR:
448 fb_logo.needs_cmapreset = 1;
449 break;
450 }
451 }
452
453 /* Return if no suitable logo was found */
454 fb_logo.logo = fb_find_logo(depth);
6d9885a8
JS		 455
456 if (!fb_logo.logo) {
457 return 0;
458 }
1da177e4 459
9c44e5f6
AD		 460 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
461 yres = info->var.yres;
462 else
463 yres = info->var.xres;
464
6d9885a8 465 if (fb_logo.logo->height > yres) {
1da177e4
LT		 466 fb_logo.logo = NULL;
467 return 0;
468 }
9c44e5f6 469
1da177e4
LT		 470 /* What depth we asked for might be different from what we get */
471 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
472 fb_logo.depth = 8;
473 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
474 fb_logo.depth = 4;
475 else
476 fb_logo.depth = 1;
477 return fb_logo.logo->height;
478}
479
9c44e5f6 480int fb_show_logo(struct fb_info *info, int rotate)
1da177e4
LT		 481{
482 u32 *palette = NULL, *saved_pseudo_palette = NULL;
9c44e5f6 483 unsigned char *logo_new = NULL, *logo_rotate = NULL;
1da177e4 484 struct fb_image image;
1da177e4
LT		 485
486 /* Return if the frame buffer is not mapped or suspended */
70802c60
AD		 487 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING ||
488 info->flags & FBINFO_MODULE)
1da177e4
LT		 489 return 0;
490
491 image.depth = 8;
492 image.data = fb_logo.logo->data;
493
494 if (fb_logo.needs_cmapreset)
495 fb_set_logocmap(info, fb_logo.logo);
496
497 if (fb_logo.needs_truepalette ||
498 fb_logo.needs_directpalette) {
499 palette = kmalloc(256 * 4, GFP_KERNEL);
500 if (palette == NULL)
501 return 0;
502
503 if (fb_logo.needs_truepalette)
504 fb_set_logo_truepalette(info, fb_logo.logo, palette);
505 else
506 fb_set_logo_directpalette(info, fb_logo.logo, palette);
507
508 saved_pseudo_palette = info->pseudo_palette;
509 info->pseudo_palette = palette;
510 }
511
512 if (fb_logo.depth <= 4) {
513 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
514 GFP_KERNEL);
515 if (logo_new == NULL) {
516 kfree(palette);
517 if (saved_pseudo_palette)
518 info->pseudo_palette = saved_pseudo_palette;
519 return 0;
520 }
521 image.data = logo_new;
522 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
523 }
524
9c44e5f6
AD		 525 image.dx = 0;
526 image.dy = 0;
1da177e4
LT		 527 image.width = fb_logo.logo->width;
528 image.height = fb_logo.logo->height;
1da177e4 529
9c44e5f6
AD		 530 if (rotate) {
531 logo_rotate = kmalloc(fb_logo.logo->width *
532 fb_logo.logo->height, GFP_KERNEL);
533 if (logo_rotate)
534 fb_rotate_logo(info, logo_rotate, &image, rotate);
1da177e4 535 }
9c44e5f6 536
448d4797 537 fb_do_show_logo(info, &image, rotate, num_online_cpus());
9c44e5f6 538
1da177e4
LT		 539 kfree(palette);
540 if (saved_pseudo_palette != NULL)
541 info->pseudo_palette = saved_pseudo_palette;
542 kfree(logo_new);
9c44e5f6 543 kfree(logo_rotate);
1da177e4
LT		 544 return fb_logo.logo->height;
545}
546#else
9c44e5f6
AD		 547int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
548int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
1da177e4
LT		 549#endif /* CONFIG_LOGO */
550
551static int fbmem_read_proc(char *buf, char **start, off_t offset,
552 int len, int *eof, void *private)
553{
554 struct fb_info **fi;
555 int clen;
556
557 clen = 0;
a09fd48f
GU		 558 for (fi = registered_fb; fi < &registered_fb[FB_MAX] && clen < 4000;
559 fi++)
1da177e4
LT		 560 if (*fi)
561 clen += sprintf(buf + clen, "%d %s\n",
562 (*fi)->node,
563 (*fi)->fix.id);
564 *start = buf + offset;
565 if (clen > offset)
566 clen -= offset;
567 else
568 clen = 0;
569 return clen < len ? clen : len;
570}
571
572static ssize_t
573fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
574{
575 unsigned long p = *ppos;
ad9a824e 576 struct inode *inode = file->f_path.dentry->d_inode;
1da177e4
LT		 577 int fbidx = iminor(inode);
578 struct fb_info *info = registered_fb[fbidx];
579 u32 *buffer, *dst;
580 u32 __iomem *src;
581 int c, i, cnt = 0, err = 0;
582 unsigned long total_size;
583
584 if (!info || ! info->screen_base)
585 return -ENODEV;
586
587 if (info->state != FBINFO_STATE_RUNNING)
588 return -EPERM;
589
590 if (info->fbops->fb_read)
3f9b0880 591 return info->fbops->fb_read(info, buf, count, ppos);
1da177e4
LT		 592
593 total_size = info->screen_size;
0a484a3a 594
1da177e4
LT		 595 if (total_size == 0)
596 total_size = info->fix.smem_len;
597
598 if (p >= total_size)
0a484a3a
AD		 599 return 0;
600
1da177e4 601 if (count >= total_size)
0a484a3a
AD		 602 count = total_size;
603
1da177e4
LT		 604 if (count + p > total_size)
605 count = total_size - p;
606
1da177e4
LT		 607 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
608 GFP_KERNEL);
609 if (!buffer)
610 return -ENOMEM;
611
612 src = (u32 __iomem *) (info->screen_base + p);
613
614 if (info->fbops->fb_sync)
615 info->fbops->fb_sync(info);
616
617 while (count) {
618 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
619 dst = buffer;
620 for (i = c >> 2; i--; )
621 *dst++ = fb_readl(src++);
622 if (c & 3) {
623 u8 *dst8 = (u8 *) dst;
624 u8 __iomem *src8 = (u8 __iomem *) src;
625
626 for (i = c & 3; i--;)
627 *dst8++ = fb_readb(src8++);
628
629 src = (u32 __iomem *) src8;
630 }
631
632 if (copy_to_user(buf, buffer, c)) {
633 err = -EFAULT;
634 break;
635 }
636 *ppos += c;
637 buf += c;
638 cnt += c;
639 count -= c;
640 }
641
642 kfree(buffer);
0a484a3a 643
1da177e4
LT		 644 return (err) ? err : cnt;
645}
646
647static ssize_t
648fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
649{
650 unsigned long p = *ppos;
ad9a824e 651 struct inode *inode = file->f_path.dentry->d_inode;
1da177e4
LT		 652 int fbidx = iminor(inode);
653 struct fb_info *info = registered_fb[fbidx];
654 u32 *buffer, *src;
655 u32 __iomem *dst;
0a484a3a 656 int c, i, cnt = 0, err = 0;
1da177e4
LT		 657 unsigned long total_size;
658
659 if (!info || !info->screen_base)
660 return -ENODEV;
661
662 if (info->state != FBINFO_STATE_RUNNING)
663 return -EPERM;
664
665 if (info->fbops->fb_write)
3f9b0880 666 return info->fbops->fb_write(info, buf, count, ppos);
1da177e4
LT		 667
668 total_size = info->screen_size;
0a484a3a 669
1da177e4
LT		 670 if (total_size == 0)
671 total_size = info->fix.smem_len;
672
673 if (p > total_size)
6a2a8866 674 return -EFBIG;
0a484a3a 675
6a2a8866
AD		 676 if (count > total_size) {
677 err = -EFBIG;
0a484a3a 678 count = total_size;
6a2a8866
AD		 679 }
680
681 if (count + p > total_size) {
682 if (!err)
683 err = -ENOSPC;
0a484a3a 684
0a484a3a 685 count = total_size - p;
6a2a8866 686 }
0a484a3a 687
1da177e4
LT		 688 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
689 GFP_KERNEL);
690 if (!buffer)
691 return -ENOMEM;
692
693 dst = (u32 __iomem *) (info->screen_base + p);
694
695 if (info->fbops->fb_sync)
696 info->fbops->fb_sync(info);
697
698 while (count) {
699 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
700 src = buffer;
0a484a3a 701
1da177e4
LT		 702 if (copy_from_user(src, buf, c)) {
703 err = -EFAULT;
704 break;
705 }
0a484a3a 706
1da177e4
LT		 707 for (i = c >> 2; i--; )
708 fb_writel(*src++, dst++);
0a484a3a 709
1da177e4
LT		 710 if (c & 3) {
711 u8 *src8 = (u8 *) src;
712 u8 __iomem *dst8 = (u8 __iomem *) dst;
713
714 for (i = c & 3; i--; )
715 fb_writeb(*src8++, dst8++);
716
717 dst = (u32 __iomem *) dst8;
718 }
0a484a3a 719
1da177e4
LT		 720 *ppos += c;
721 buf += c;
722 cnt += c;
723 count -= c;
724 }
0a484a3a 725
1da177e4
LT		 726 kfree(buffer);
727
6a2a8866 728 return (cnt) ? cnt : err;
1da177e4
LT		 729}
730
731#ifdef CONFIG_KMOD
732static void try_to_load(int fb)
733{
734 request_module("fb%d", fb);
735}
736#endif /* CONFIG_KMOD */
737
738int
739fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
740{
1207069f 741 struct fb_fix_screeninfo *fix = &info->fix;
1da177e4
LT		 742 int xoffset = var->xoffset;
743 int yoffset = var->yoffset;
1207069f
AD		 744 int err = 0, yres = info->var.yres;
745
746 if (var->yoffset > 0) {
747 if (var->vmode & FB_VMODE_YWRAP) {
748 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
749 err = -EINVAL;
750 else
751 yres = 0;
752 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
753 err = -EINVAL;
754 }
755
756 if (var->xoffset > 0 && (!fix->xpanstep ||
757 (var->xoffset % fix->xpanstep)))
758 err = -EINVAL;
759
760 if (err || !info->fbops->fb_pan_display || xoffset < 0 ||
761 yoffset < 0 || var->yoffset + yres > info->var.yres_virtual ||
762 var->xoffset + info->var.xres > info->var.xres_virtual)
763 return -EINVAL;
1da177e4 764
1da177e4
LT		 765 if ((err = info->fbops->fb_pan_display(var, info)))
766 return err;
767 info->var.xoffset = var->xoffset;
768 info->var.yoffset = var->yoffset;
769 if (var->vmode & FB_VMODE_YWRAP)
770 info->var.vmode |= FB_VMODE_YWRAP;
771 else
772 info->var.vmode &= ~FB_VMODE_YWRAP;
773 return 0;
774}
775
38a3dc51
AD		 776static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
777 u32 activate)
778{
779 struct fb_event event;
780 struct fb_blit_caps caps, fbcaps;
781 int err = 0;
782
783 memset(&caps, 0, sizeof(caps));
784 memset(&fbcaps, 0, sizeof(fbcaps));
785 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
786 event.info = info;
787 event.data = &caps;
788 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
789 info->fbops->fb_get_caps(info, &fbcaps, var);
790
791 if (((fbcaps.x ^ caps.x) & caps.x) ||
792 ((fbcaps.y ^ caps.y) & caps.y) ||
793 (fbcaps.len < caps.len))
794 err = -EINVAL;
795
796 return err;
797}
798
1da177e4
LT		 799int
800fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
801{
3edea483 802 int err, flags = info->flags;
1da177e4
LT		 803
804 if (var->activate & FB_ACTIVATE_INV_MODE) {
805 struct fb_videomode mode1, mode2;
806 int ret = 0;
807
808 fb_var_to_videomode(&mode1, var);
809 fb_var_to_videomode(&mode2, &info->var);
810 /* make sure we don't delete the videomode of current var */
811 ret = fb_mode_is_equal(&mode1, &mode2);
812
813 if (!ret) {
814 struct fb_event event;
815
816 event.info = info;
817 event.data = &mode1;
256154fb 818 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
1da177e4
LT		 819 }
820
821 if (!ret)
822 fb_delete_videomode(&mode1, &info->modelist);
823
824 return ret;
825 }
826
827 if ((var->activate & FB_ACTIVATE_FORCE) ||
828 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
4941cb7a
AD		 829 u32 activate = var->activate;
830
1da177e4
LT		 831 if (!info->fbops->fb_check_var) {
832 *var = info->var;
833 return 0;
834 }
835
836 if ((err = info->fbops->fb_check_var(var, info)))
837 return err;
838
839 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
840 struct fb_videomode mode;
841 int err = 0;
842
38a3dc51
AD		 843 if (info->fbops->fb_get_caps) {
844 err = fb_check_caps(info, var, activate);
845
846 if (err)
847 goto done;
848 }
849
1da177e4 850 info->var = *var;
38a3dc51 851
1da177e4
LT		 852 if (info->fbops->fb_set_par)
853 info->fbops->fb_set_par(info);
854
855 fb_pan_display(info, &info->var);
856
857 fb_set_cmap(&info->cmap, info);
858
859 fb_var_to_videomode(&mode, &info->var);
860
861 if (info->modelist.prev && info->modelist.next &&
862 !list_empty(&info->modelist))
863 err = fb_add_videomode(&mode, &info->modelist);
864
3edea483 865 if (!err && (flags & FBINFO_MISC_USEREVENT)) {
1da177e4 866 struct fb_event event;
4941cb7a 867 int evnt = (activate & FB_ACTIVATE_ALL) ?
7726e9e1
AD		 868 FB_EVENT_MODE_CHANGE_ALL :
869 FB_EVENT_MODE_CHANGE;
1da177e4
LT		 870
871 info->flags &= ~FBINFO_MISC_USEREVENT;
872 event.info = info;
256154fb 873 fb_notifier_call_chain(evnt, &event);
1da177e4
LT		 874 }
875 }
876 }
38a3dc51
AD		 877
878 done:
1da177e4
LT		 879 return 0;
880}
881
882int
883fb_blank(struct fb_info *info, int blank)
884{
885 int ret = -EINVAL;
886
887 if (blank > FB_BLANK_POWERDOWN)
888 blank = FB_BLANK_POWERDOWN;
889
890 if (info->fbops->fb_blank)
891 ret = info->fbops->fb_blank(blank, info);
892
893 if (!ret) {
894 struct fb_event event;
895
896 event.info = info;
897 event.data = &blank;
256154fb 898 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1da177e4
LT		 899 }
900
901 return ret;
902}
903
904static int
905fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
906 unsigned long arg)
907{
908 int fbidx = iminor(inode);
909 struct fb_info *info = registered_fb[fbidx];
910 struct fb_ops *fb = info->fbops;
911 struct fb_var_screeninfo var;
912 struct fb_fix_screeninfo fix;
913 struct fb_con2fbmap con2fb;
914 struct fb_cmap_user cmap;
915 struct fb_event event;
916 void __user *argp = (void __user *)arg;
917 int i;
918
919 if (!fb)
920 return -ENODEV;
921 switch (cmd) {
922 case FBIOGET_VSCREENINFO:
923 return copy_to_user(argp, &info->var,
924 sizeof(var)) ? -EFAULT : 0;
925 case FBIOPUT_VSCREENINFO:
926 if (copy_from_user(&var, argp, sizeof(var)))
927 return -EFAULT;
928 acquire_console_sem();
929 info->flags |= FBINFO_MISC_USEREVENT;
930 i = fb_set_var(info, &var);
931 info->flags &= ~FBINFO_MISC_USEREVENT;
932 release_console_sem();
933 if (i) return i;
934 if (copy_to_user(argp, &var, sizeof(var)))
935 return -EFAULT;
936 return 0;
937 case FBIOGET_FSCREENINFO:
938 return copy_to_user(argp, &info->fix,
939 sizeof(fix)) ? -EFAULT : 0;
940 case FBIOPUTCMAP:
941 if (copy_from_user(&cmap, argp, sizeof(cmap)))
942 return -EFAULT;
943 return (fb_set_user_cmap(&cmap, info));
944 case FBIOGETCMAP:
945 if (copy_from_user(&cmap, argp, sizeof(cmap)))
946 return -EFAULT;
947 return fb_cmap_to_user(&info->cmap, &cmap);
948 case FBIOPAN_DISPLAY:
949 if (copy_from_user(&var, argp, sizeof(var)))
950 return -EFAULT;
951 acquire_console_sem();
952 i = fb_pan_display(info, &var);
953 release_console_sem();
954 if (i)
955 return i;
956 if (copy_to_user(argp, &var, sizeof(var)))
957 return -EFAULT;
958 return 0;
959 case FBIO_CURSOR:
960 return -EINVAL;
961 case FBIOGET_CON2FBMAP:
962 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
963 return -EFAULT;
964 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
965 return -EINVAL;
966 con2fb.framebuffer = -1;
967 event.info = info;
968 event.data = &con2fb;
256154fb 969 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1da177e4
LT		 970 return copy_to_user(argp, &con2fb,
971 sizeof(con2fb)) ? -EFAULT : 0;
972 case FBIOPUT_CON2FBMAP:
973 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
974 return - EFAULT;
975 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
976 return -EINVAL;
977 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
978 return -EINVAL;
979#ifdef CONFIG_KMOD
980 if (!registered_fb[con2fb.framebuffer])
981 try_to_load(con2fb.framebuffer);
982#endif /* CONFIG_KMOD */
983 if (!registered_fb[con2fb.framebuffer])
984 return -EINVAL;
985 event.info = info;
986 event.data = &con2fb;
256154fb
AD		 987 return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP,
988 &event);
1da177e4
LT		 989 case FBIOBLANK:
990 acquire_console_sem();
991 info->flags |= FBINFO_MISC_USEREVENT;
992 i = fb_blank(info, arg);
993 info->flags &= ~FBINFO_MISC_USEREVENT;
994 release_console_sem();
995 return i;
996 default:
997 if (fb->fb_ioctl == NULL)
998 return -EINVAL;
67a6680d 999 return fb->fb_ioctl(info, cmd, arg);
1da177e4
LT		 1000 }
1001}
1002
1003#ifdef CONFIG_COMPAT
c7f82d9c
AB		 1004struct fb_fix_screeninfo32 {
1005 char id[16];
1006 compat_caddr_t smem_start;
1007 u32 smem_len;
1008 u32 type;
1009 u32 type_aux;
1010 u32 visual;
1011 u16 xpanstep;
1012 u16 ypanstep;
1013 u16 ywrapstep;
1014 u32 line_length;
1015 compat_caddr_t mmio_start;
1016 u32 mmio_len;
1017 u32 accel;
1018 u16 reserved[3];
1019};
1020
1021struct fb_cmap32 {
1022 u32 start;
1023 u32 len;
1024 compat_caddr_t red;
1025 compat_caddr_t green;
1026 compat_caddr_t blue;
1027 compat_caddr_t transp;
1028};
1029
1030static int fb_getput_cmap(struct inode *inode, struct file *file,
1031 unsigned int cmd, unsigned long arg)
1032{
1033 struct fb_cmap_user __user *cmap;
1034 struct fb_cmap32 __user *cmap32;
1035 __u32 data;
1036 int err;
1037
1038 cmap = compat_alloc_user_space(sizeof(*cmap));
1039 cmap32 = compat_ptr(arg);
1040
1041 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1042 return -EFAULT;
1043
1044 if (get_user(data, &cmap32->red) ||
1045 put_user(compat_ptr(data), &cmap->red) ||
1046 get_user(data, &cmap32->green) ||
1047 put_user(compat_ptr(data), &cmap->green) ||
1048 get_user(data, &cmap32->blue) ||
1049 put_user(compat_ptr(data), &cmap->blue) ||
1050 get_user(data, &cmap32->transp) ||
1051 put_user(compat_ptr(data), &cmap->transp))
1052 return -EFAULT;
1053
1054 err = fb_ioctl(inode, file, cmd, (unsigned long) cmap);
1055
1056 if (!err) {
1057 if (copy_in_user(&cmap32->start,
1058 &cmap->start,
1059 2 * sizeof(__u32)))
1060 err = -EFAULT;
1061 }
1062 return err;
1063}
1064
1065static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1066 struct fb_fix_screeninfo32 __user *fix32)
1067{
1068 __u32 data;
1069 int err;
1070
1071 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1072
1073 data = (__u32) (unsigned long) fix->smem_start;
1074 err |= put_user(data, &fix32->smem_start);
1075
1076 err |= put_user(fix->smem_len, &fix32->smem_len);
1077 err |= put_user(fix->type, &fix32->type);
1078 err |= put_user(fix->type_aux, &fix32->type_aux);
1079 err |= put_user(fix->visual, &fix32->visual);
1080 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1081 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1082 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1083 err |= put_user(fix->line_length, &fix32->line_length);
1084
1085 data = (__u32) (unsigned long) fix->mmio_start;
1086 err |= put_user(data, &fix32->mmio_start);
1087
1088 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1089 err |= put_user(fix->accel, &fix32->accel);
1090 err |= copy_to_user(fix32->reserved, fix->reserved,
1091 sizeof(fix->reserved));
1092
1093 return err;
1094}
1095
1096static int fb_get_fscreeninfo(struct inode *inode, struct file *file,
1097 unsigned int cmd, unsigned long arg)
1098{
1099 mm_segment_t old_fs;
1100 struct fb_fix_screeninfo fix;
1101 struct fb_fix_screeninfo32 __user *fix32;
1102 int err;
1103
1104 fix32 = compat_ptr(arg);
1105
1106 old_fs = get_fs();
1107 set_fs(KERNEL_DS);
1108 err = fb_ioctl(inode, file, cmd, (unsigned long) &fix);
1109 set_fs(old_fs);
1110
1111 if (!err)
1112 err = do_fscreeninfo_to_user(&fix, fix32);
1113
1114 return err;
1115}
1116
1da177e4
LT		 1117static long
1118fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1119{
ad9a824e 1120 struct inode *inode = file->f_path.dentry->d_inode;
c7f82d9c 1121 int fbidx = iminor(inode);
1da177e4
LT		 1122 struct fb_info *info = registered_fb[fbidx];
1123 struct fb_ops *fb = info->fbops;
c7f82d9c 1124 long ret = -ENOIOCTLCMD;
1da177e4 1125
1da177e4 1126 lock_kernel();
c7f82d9c
AB		 1127 switch(cmd) {
1128 case FBIOGET_VSCREENINFO:
1129 case FBIOPUT_VSCREENINFO:
1130 case FBIOPAN_DISPLAY:
1131 case FBIOGET_CON2FBMAP:
1132 case FBIOPUT_CON2FBMAP:
1133 arg = (unsigned long) compat_ptr(arg);
1134 case FBIOBLANK:
1135 ret = fb_ioctl(inode, file, cmd, arg);
1136 break;
1137
1138 case FBIOGET_FSCREENINFO:
1139 ret = fb_get_fscreeninfo(inode, file, cmd, arg);
1140 break;
1141
1142 case FBIOGETCMAP:
1143 case FBIOPUTCMAP:
1144 ret = fb_getput_cmap(inode, file, cmd, arg);
1145 break;
1146
1147 default:
1148 if (fb->fb_compat_ioctl)
67a6680d 1149 ret = fb->fb_compat_ioctl(info, cmd, arg);
c7f82d9c
AB		 1150 break;
1151 }
1da177e4
LT		 1152 unlock_kernel();
1153 return ret;
1154}
1155#endif
1156
1157static int
1158fb_mmap(struct file *file, struct vm_area_struct * vma)
1159{
ad9a824e 1160 int fbidx = iminor(file->f_path.dentry->d_inode);
1da177e4
LT		 1161 struct fb_info *info = registered_fb[fbidx];
1162 struct fb_ops *fb = info->fbops;
1163 unsigned long off;
1164#if !defined(__sparc__) || defined(__sparc_v9__)
1165 unsigned long start;
1166 u32 len;
1167#endif
1168
1169 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1170 return -EINVAL;
1171 off = vma->vm_pgoff << PAGE_SHIFT;
1172 if (!fb)
1173 return -ENODEV;
1174 if (fb->fb_mmap) {
1175 int res;
1176 lock_kernel();
216d526c 1177 res = fb->fb_mmap(info, vma);
1da177e4
LT		 1178 unlock_kernel();
1179 return res;
1180 }
1181
1182#if defined(__sparc__) && !defined(__sparc_v9__)
1183 /* Should never get here, all fb drivers should have their own
1184 mmap routines */
1185 return -EINVAL;
1186#else
1187 /* !sparc32... */
1188 lock_kernel();
1189
1190 /* frame buffer memory */
1191 start = info->fix.smem_start;
1192 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1193 if (off >= len) {
1194 /* memory mapped io */
1195 off -= len;
1196 if (info->var.accel_flags) {
1197 unlock_kernel();
1198 return -EINVAL;
1199 }
1200 start = info->fix.mmio_start;
1201 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1202 }
1203 unlock_kernel();
1204 start &= PAGE_MASK;
1205 if ((vma->vm_end - vma->vm_start + off) > len)
1206 return -EINVAL;
1207 off += start;
1208 vma->vm_pgoff = off >> PAGE_SHIFT;
1209 /* This is an IO map - tell maydump to skip this VMA */
1210 vma->vm_flags |= VM_IO | VM_RESERVED;
1da177e4
LT		 1211#if defined(__mc68000__)
1212#if defined(CONFIG_SUN3)
1213 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1214#elif defined(CONFIG_MMU)
1215 if (CPU_IS_020_OR_030)
1216 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1217 if (CPU_IS_040_OR_060) {
1218 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1219 /* Use no-cache mode, serialized */
1220 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1221 }
1222#endif
1223#elif defined(__powerpc__)
8b150478 1224 vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT,
1da177e4
LT		 1225 vma->vm_end - vma->vm_start,
1226 vma->vm_page_prot);
1227#elif defined(__alpha__)
1228 /* Caching is off in the I/O space quadrant by design. */
1229#elif defined(__i386__) || defined(__x86_64__)
1230 if (boot_cpu_data.x86 > 3)
1231 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
14778d90 1232#elif defined(__mips__) || defined(__sparc_v9__)
1da177e4
LT		 1233 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1234#elif defined(__hppa__)
1235 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1236#elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
1237 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1238#elif defined(__ia64__)
1239 if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
1240 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1241 else
1242 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1243#else
1244#warning What do we have to do here??
1245#endif
1246 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1247 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1248 return -EAGAIN;
1da177e4
LT		 1249 return 0;
1250#endif /* !sparc32 */
1251}
1252
1253static int
1254fb_open(struct inode *inode, struct file *file)
1255{
1256 int fbidx = iminor(inode);
1257 struct fb_info *info;
1258 int res = 0;
1259
1260 if (fbidx >= FB_MAX)
1261 return -ENODEV;
1262#ifdef CONFIG_KMOD
1263 if (!(info = registered_fb[fbidx]))
1264 try_to_load(fbidx);
1265#endif /* CONFIG_KMOD */
1266 if (!(info = registered_fb[fbidx]))
1267 return -ENODEV;
1268 if (!try_module_get(info->fbops->owner))
1269 return -ENODEV;
cae8a12f 1270 file->private_data = info;
1da177e4
LT		 1271 if (info->fbops->fb_open) {
1272 res = info->fbops->fb_open(info,1);
1273 if (res)
1274 module_put(info->fbops->owner);
1275 }
1276 return res;
1277}
1278
1279static int
1280fb_release(struct inode *inode, struct file *file)
1281{
cae8a12f 1282 struct fb_info * const info = file->private_data;
1da177e4
LT		 1283
1284 lock_kernel();
1da177e4
LT		 1285 if (info->fbops->fb_release)
1286 info->fbops->fb_release(info,1);
1287 module_put(info->fbops->owner);
1288 unlock_kernel();
1289 return 0;
1290}
1291
0128beee 1292static const struct file_operations fb_fops = {
1da177e4
LT		 1293 .owner = THIS_MODULE,
1294 .read = fb_read,
1295 .write = fb_write,
1296 .ioctl = fb_ioctl,
1297#ifdef CONFIG_COMPAT
1298 .compat_ioctl = fb_compat_ioctl,
1299#endif
1300 .mmap = fb_mmap,
1301 .open = fb_open,
1302 .release = fb_release,
1303#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1304 .get_unmapped_area = get_fb_unmapped_area,
1305#endif
5e841b88
PM		 1306#ifdef CONFIG_FB_DEFERRED_IO
1307 .fsync = fb_deferred_io_fsync,
1308#endif
1da177e4
LT		 1309};
1310
9a179176
AD		 1311struct class *fb_class;
1312EXPORT_SYMBOL(fb_class);
1da177e4
LT		 1313/**
1314 * register_framebuffer - registers a frame buffer device
1315 * @fb_info: frame buffer info structure
1316 *
1317 * Registers a frame buffer device @fb_info.
1318 *
1319 * Returns negative errno on error, or zero for success.
1320 *
1321 */
1322
1323int
1324register_framebuffer(struct fb_info *fb_info)
1325{
1326 int i;
1327 struct fb_event event;
96fe6a21 1328 struct fb_videomode mode;
1da177e4
LT		 1329
1330 if (num_registered_fb == FB_MAX)
1331 return -ENXIO;
1332 num_registered_fb++;
1333 for (i = 0 ; i < FB_MAX; i++)
1334 if (!registered_fb[i])
1335 break;
1336 fb_info->node = i;
1337
78cde088
GKH		 1338 fb_info->dev = device_create(fb_class, fb_info->device,
1339 MKDEV(FB_MAJOR, i), "fb%d", i);
1340 if (IS_ERR(fb_info->dev)) {
1da177e4 1341 /* Not fatal */
78cde088
GKH		 1342 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1343 fb_info->dev = NULL;
1da177e4 1344 } else
78cde088 1345 fb_init_device(fb_info);
1da177e4
LT		 1346
1347 if (fb_info->pixmap.addr == NULL) {
1348 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1349 if (fb_info->pixmap.addr) {
1350 fb_info->pixmap.size = FBPIXMAPSIZE;
1351 fb_info->pixmap.buf_align = 1;
1352 fb_info->pixmap.scan_align = 1;
58a60643 1353 fb_info->pixmap.access_align = 32;
1da177e4
LT		 1354 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1355 }
1356 }
1357 fb_info->pixmap.offset = 0;
1358
bf26ad72
AD		 1359 if (!fb_info->pixmap.blit_x)
1360 fb_info->pixmap.blit_x = ~(u32)0;
1361
1362 if (!fb_info->pixmap.blit_y)
1363 fb_info->pixmap.blit_y = ~(u32)0;
1364
96fe6a21 1365 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1da177e4 1366 INIT_LIST_HEAD(&fb_info->modelist);
1da177e4 1367
96fe6a21
AD		 1368 fb_var_to_videomode(&mode, &fb_info->var);
1369 fb_add_videomode(&mode, &fb_info->modelist);
1da177e4
LT		 1370 registered_fb[i] = fb_info;
1371
1da177e4 1372 event.info = fb_info;
256154fb 1373 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1da177e4
LT		 1374 return 0;
1375}
1376
1377
1378/**
1379 * unregister_framebuffer - releases a frame buffer device
1380 * @fb_info: frame buffer info structure
1381 *
1382 * Unregisters a frame buffer device @fb_info.
1383 *
1384 * Returns negative errno on error, or zero for success.
1385 *
1386 */
1387
1388int
1389unregister_framebuffer(struct fb_info *fb_info)
1390{
e614b18d 1391 struct fb_event event;
1da177e4
LT		 1392 int i;
1393
1394 i = fb_info->node;
1395 if (!registered_fb[i])
1396 return -EINVAL;
1da177e4 1397
e614b18d
AD		 1398 if (fb_info->pixmap.addr &&
1399 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1da177e4
LT		 1400 kfree(fb_info->pixmap.addr);
1401 fb_destroy_modelist(&fb_info->modelist);
1402 registered_fb[i]=NULL;
1403 num_registered_fb--;
78cde088
GKH		 1404 fb_cleanup_device(fb_info);
1405 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
e614b18d 1406 event.info = fb_info;
256154fb 1407 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1da177e4
LT		 1408 return 0;
1409}
1410
1da177e4
LT		 1411/**
1412 * fb_set_suspend - low level driver signals suspend
1413 * @info: framebuffer affected
1414 * @state: 0 = resuming, !=0 = suspending
1415 *
1416 * This is meant to be used by low level drivers to
1417 * signal suspend/resume to the core & clients.
1418 * It must be called with the console semaphore held
1419 */
1420void fb_set_suspend(struct fb_info *info, int state)
1421{
1422 struct fb_event event;
1423
1424 event.info = info;
1425 if (state) {
256154fb 1426 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1da177e4
LT		 1427 info->state = FBINFO_STATE_SUSPENDED;
1428 } else {
1429 info->state = FBINFO_STATE_RUNNING;
256154fb 1430 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1da177e4
LT		 1431 }
1432}
1433
1434/**
1435 * fbmem_init - init frame buffer subsystem
1436 *
1437 * Initialize the frame buffer subsystem.
1438 *
1439 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1440 *
1441 */
1442
1443static int __init
1444fbmem_init(void)
1445{
1446 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1447
1da177e4
LT		 1448 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1449 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1450
56b22935 1451 fb_class = class_create(THIS_MODULE, "graphics");
1da177e4
LT		 1452 if (IS_ERR(fb_class)) {
1453 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1454 fb_class = NULL;
1455 }
1456 return 0;
1457}
1458
1459#ifdef MODULE
1460module_init(fbmem_init);
1461static void __exit
1462fbmem_exit(void)
1463{
56b22935 1464 class_destroy(fb_class);
5a340cce 1465 unregister_chrdev(FB_MAJOR, "fb");
1da177e4
LT		 1466}
1467
1468module_exit(fbmem_exit);
1469MODULE_LICENSE("GPL");
1470MODULE_DESCRIPTION("Framebuffer base");
1471#else
1472subsys_initcall(fbmem_init);
1473#endif
1474
1475int fb_new_modelist(struct fb_info *info)
1476{
1477 struct fb_event event;
1478 struct fb_var_screeninfo var = info->var;
1479 struct list_head *pos, *n;
1480 struct fb_modelist *modelist;
1481 struct fb_videomode *m, mode;
1482 int err = 1;
1483
1484 list_for_each_safe(pos, n, &info->modelist) {
1485 modelist = list_entry(pos, struct fb_modelist, list);
1486 m = &modelist->mode;
1487 fb_videomode_to_var(&var, m);
1488 var.activate = FB_ACTIVATE_TEST;
1489 err = fb_set_var(info, &var);
1490 fb_var_to_videomode(&mode, &var);
1491 if (err || !fb_mode_is_equal(m, &mode)) {
1492 list_del(pos);
1493 kfree(pos);
1494 }
1495 }
1496
1497 err = 1;
1498
1499 if (!list_empty(&info->modelist)) {
1500 event.info = info;
256154fb 1501 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
1da177e4
LT		 1502 }
1503
1504 return err;
1505}
1506
0128beee
HD		 1507static char *video_options[FB_MAX] __read_mostly;
1508static int ofonly __read_mostly;
1da177e4 1509
4dc3b16b
PP		 1510extern const char *global_mode_option;
1511
1da177e4
LT		 1512/**
1513 * fb_get_options - get kernel boot parameters
1514 * @name: framebuffer name as it would appear in
1515 * the boot parameter line
1516 * (video=<name>:<options>)
1517 * @option: the option will be stored here
1518 *
1519 * NOTE: Needed to maintain backwards compatibility
1520 */
1521int fb_get_options(char *name, char **option)
1522{
1523 char *opt, *options = NULL;
1524 int opt_len, retval = 0;
1525 int name_len = strlen(name), i;
1526
1527 if (name_len && ofonly && strncmp(name, "offb", 4))
1528 retval = 1;
1529
1530 if (name_len && !retval) {
1531 for (i = 0; i < FB_MAX; i++) {
1532 if (video_options[i] == NULL)
1533 continue;
1534 opt_len = strlen(video_options[i]);
1535 if (!opt_len)
1536 continue;
1537 opt = video_options[i];
1538 if (!strncmp(name, opt, name_len) &&
1539 opt[name_len] == ':')
1540 options = opt + name_len + 1;
1541 }
1542 }
1543 if (options && !strncmp(options, "off", 3))
1544 retval = 1;
1545
1546 if (option)
1547 *option = options;
1548
1549 return retval;
1550}
1551
bc6d7fdf 1552#ifndef MODULE
1da177e4
LT		 1553/**
1554 * video_setup - process command line options
1555 * @options: string of options
1556 *
1557 * Process command line options for frame buffer subsystem.
1558 *
1559 * NOTE: This function is a __setup and __init function.
1560 * It only stores the options. Drivers have to call
1561 * fb_get_options() as necessary.
1562 *
1563 * Returns zero.
1564 *
1565 */
75c96f85 1566static int __init video_setup(char *options)
1da177e4
LT		 1567{
1568 int i, global = 0;
1569
1570 if (!options || !*options)
1571 global = 1;
1572
1573 if (!global && !strncmp(options, "ofonly", 6)) {
1574 ofonly = 1;
1575 global = 1;
1576 }
1577
1578 if (!global && !strstr(options, "fb:")) {
1579 global_mode_option = options;
1580 global = 1;
1581 }
1582
1583 if (!global) {
1584 for (i = 0; i < FB_MAX; i++) {
1585 if (video_options[i] == NULL) {
1586 video_options[i] = options;
1587 break;
1588 }
1589
1590 }
1591 }
1592
9b41046c 1593 return 1;
1da177e4
LT		 1594}
1595__setup("video=", video_setup);
bc6d7fdf 1596#endif
1da177e4
LT		 1597
1598 /*
1599 * Visible symbols for modules
1600 */
1601
1602EXPORT_SYMBOL(register_framebuffer);
1603EXPORT_SYMBOL(unregister_framebuffer);
1604EXPORT_SYMBOL(num_registered_fb);
1605EXPORT_SYMBOL(registered_fb);
1606EXPORT_SYMBOL(fb_prepare_logo);
1607EXPORT_SYMBOL(fb_show_logo);
1608EXPORT_SYMBOL(fb_set_var);
1609EXPORT_SYMBOL(fb_blank);
1610EXPORT_SYMBOL(fb_pan_display);
1611EXPORT_SYMBOL(fb_get_buffer_offset);
1da177e4 1612EXPORT_SYMBOL(fb_set_suspend);
1da177e4 1613EXPORT_SYMBOL(fb_get_options);
1da177e4
LT		 1614
1615MODULE_LICENSE("GPL");