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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 | ||
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 | #include <linux/efi.h> | |
39 | ||
40 | #if defined(__mc68000__) || defined(CONFIG_APUS) | |
41 | #include <asm/setup.h> | |
42 | #endif | |
43 | ||
44 | #include <asm/io.h> | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/page.h> | |
47 | #include <asm/pgtable.h> | |
48 | ||
49 | #include <linux/fb.h> | |
50 | ||
51 | /* | |
52 | * Frame buffer device initialization and setup routines | |
53 | */ | |
54 | ||
55 | #define FBPIXMAPSIZE (1024 * 8) | |
56 | ||
57 | static struct notifier_block *fb_notifier_list; | |
58 | struct fb_info *registered_fb[FB_MAX]; | |
59 | int num_registered_fb; | |
60 | ||
61 | /* | |
62 | * Helpers | |
63 | */ | |
64 | ||
65 | int fb_get_color_depth(struct fb_var_screeninfo *var) | |
66 | { | |
67 | if (var->green.length == var->blue.length && | |
68 | var->green.length == var->red.length && | |
69 | !var->green.offset && !var->blue.offset && | |
70 | !var->red.offset) | |
71 | return var->green.length; | |
72 | else | |
73 | return (var->green.length + var->red.length + | |
74 | var->blue.length); | |
75 | } | |
76 | EXPORT_SYMBOL(fb_get_color_depth); | |
77 | ||
78 | /* | |
f5a9951c | 79 | * Data padding functions. |
1da177e4 | 80 | */ |
1da177e4 LT |
81 | void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf, |
82 | u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, | |
83 | u32 height) | |
84 | { | |
f5a9951c | 85 | int i; |
1da177e4 LT |
86 | |
87 | for (i = height; i--; ) { | |
f5a9951c | 88 | memcpy(dst, src, s_pitch); |
1da177e4 LT |
89 | src += s_pitch; |
90 | dst += d_pitch; | |
91 | } | |
92 | } | |
f5a9951c | 93 | EXPORT_SYMBOL(fb_sysmove_buf_aligned); |
1da177e4 LT |
94 | |
95 | void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf, | |
96 | u8 *dst, u32 d_pitch, u8 *src, u32 idx, | |
97 | u32 height, u32 shift_high, u32 shift_low, | |
98 | u32 mod) | |
99 | { | |
100 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
101 | int i, j; | |
102 | ||
103 | for (i = height; i--; ) { | |
104 | for (j = 0; j < idx; j++) { | |
105 | tmp = dst[j]; | |
106 | tmp &= mask; | |
107 | tmp |= *src >> shift_low; | |
108 | dst[j] = tmp; | |
109 | tmp = *src << shift_high; | |
110 | dst[j+1] = tmp; | |
111 | src++; | |
112 | } | |
113 | tmp = dst[idx]; | |
114 | tmp &= mask; | |
115 | tmp |= *src >> shift_low; | |
116 | dst[idx] = tmp; | |
117 | if (shift_high < mod) { | |
118 | tmp = *src << shift_high; | |
119 | dst[idx+1] = tmp; | |
120 | } | |
121 | src++; | |
122 | dst += d_pitch; | |
123 | } | |
124 | } | |
f5a9951c | 125 | EXPORT_SYMBOL(fb_sysmove_buf_unaligned); |
1da177e4 LT |
126 | |
127 | /* | |
128 | * we need to lock this section since fb_cursor | |
129 | * may use fb_imageblit() | |
130 | */ | |
131 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
132 | { | |
133 | u32 align = buf->buf_align - 1, offset; | |
134 | char *addr = buf->addr; | |
135 | ||
136 | /* If IO mapped, we need to sync before access, no sharing of | |
137 | * the pixmap is done | |
138 | */ | |
139 | if (buf->flags & FB_PIXMAP_IO) { | |
140 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
141 | info->fbops->fb_sync(info); | |
142 | return addr; | |
143 | } | |
144 | ||
145 | /* See if we fit in the remaining pixmap space */ | |
146 | offset = buf->offset + align; | |
147 | offset &= ~align; | |
148 | if (offset + size > buf->size) { | |
149 | /* We do not fit. In order to be able to re-use the buffer, | |
150 | * we must ensure no asynchronous DMA'ing or whatever operation | |
151 | * is in progress, we sync for that. | |
152 | */ | |
153 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
154 | info->fbops->fb_sync(info); | |
155 | offset = 0; | |
156 | } | |
157 | buf->offset = offset + size; | |
158 | addr += offset; | |
159 | ||
160 | return addr; | |
161 | } | |
162 | ||
163 | #ifdef CONFIG_LOGO | |
164 | #include <linux/linux_logo.h> | |
165 | ||
166 | static inline unsigned safe_shift(unsigned d, int n) | |
167 | { | |
168 | return n < 0 ? d >> -n : d << n; | |
169 | } | |
170 | ||
171 | static void fb_set_logocmap(struct fb_info *info, | |
172 | const struct linux_logo *logo) | |
173 | { | |
174 | struct fb_cmap palette_cmap; | |
175 | u16 palette_green[16]; | |
176 | u16 palette_blue[16]; | |
177 | u16 palette_red[16]; | |
178 | int i, j, n; | |
179 | const unsigned char *clut = logo->clut; | |
180 | ||
181 | palette_cmap.start = 0; | |
182 | palette_cmap.len = 16; | |
183 | palette_cmap.red = palette_red; | |
184 | palette_cmap.green = palette_green; | |
185 | palette_cmap.blue = palette_blue; | |
186 | palette_cmap.transp = NULL; | |
187 | ||
188 | for (i = 0; i < logo->clutsize; i += n) { | |
189 | n = logo->clutsize - i; | |
190 | /* palette_cmap provides space for only 16 colors at once */ | |
191 | if (n > 16) | |
192 | n = 16; | |
193 | palette_cmap.start = 32 + i; | |
194 | palette_cmap.len = n; | |
195 | for (j = 0; j < n; ++j) { | |
196 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
197 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
198 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
199 | clut += 3; | |
200 | } | |
201 | fb_set_cmap(&palette_cmap, info); | |
202 | } | |
203 | } | |
204 | ||
205 | static void fb_set_logo_truepalette(struct fb_info *info, | |
206 | const struct linux_logo *logo, | |
207 | u32 *palette) | |
208 | { | |
209 | unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; | |
210 | unsigned char redmask, greenmask, bluemask; | |
211 | int redshift, greenshift, blueshift; | |
212 | int i; | |
213 | const unsigned char *clut = logo->clut; | |
214 | ||
215 | /* | |
216 | * We have to create a temporary palette since console palette is only | |
217 | * 16 colors long. | |
218 | */ | |
219 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
220 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
221 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
222 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
223 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
224 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
225 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
226 | ||
227 | for ( i = 0; i < logo->clutsize; i++) { | |
228 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
229 | safe_shift((clut[1] & greenmask), greenshift) | | |
230 | safe_shift((clut[2] & bluemask), blueshift)); | |
231 | clut += 3; | |
232 | } | |
233 | } | |
234 | ||
235 | static void fb_set_logo_directpalette(struct fb_info *info, | |
236 | const struct linux_logo *logo, | |
237 | u32 *palette) | |
238 | { | |
239 | int redshift, greenshift, blueshift; | |
240 | int i; | |
241 | ||
242 | redshift = info->var.red.offset; | |
243 | greenshift = info->var.green.offset; | |
244 | blueshift = info->var.blue.offset; | |
245 | ||
246 | for (i = 32; i < logo->clutsize; i++) | |
247 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
248 | } | |
249 | ||
250 | static void fb_set_logo(struct fb_info *info, | |
251 | const struct linux_logo *logo, u8 *dst, | |
252 | int depth) | |
253 | { | |
254 | int i, j, k, fg = 1; | |
255 | const u8 *src = logo->data; | |
256 | u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; | |
257 | ||
258 | if (fb_get_color_depth(&info->var) == 3) | |
259 | fg = 7; | |
260 | ||
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 | */ | |
313 | static struct logo_data { | |
314 | int depth; | |
315 | int needs_directpalette; | |
316 | int needs_truepalette; | |
317 | int needs_cmapreset; | |
318 | const struct linux_logo *logo; | |
319 | } fb_logo; | |
320 | ||
321 | int fb_prepare_logo(struct fb_info *info) | |
322 | { | |
323 | int depth = fb_get_color_depth(&info->var); | |
324 | ||
325 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
326 | ||
327 | if (info->flags & FBINFO_MISC_TILEBLITTING) | |
328 | return 0; | |
329 | ||
330 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
331 | depth = info->var.blue.length; | |
332 | if (info->var.red.length < depth) | |
333 | depth = info->var.red.length; | |
334 | if (info->var.green.length < depth) | |
335 | depth = info->var.green.length; | |
336 | } | |
337 | ||
338 | if (depth >= 8) { | |
339 | switch (info->fix.visual) { | |
340 | case FB_VISUAL_TRUECOLOR: | |
341 | fb_logo.needs_truepalette = 1; | |
342 | break; | |
343 | case FB_VISUAL_DIRECTCOLOR: | |
344 | fb_logo.needs_directpalette = 1; | |
345 | fb_logo.needs_cmapreset = 1; | |
346 | break; | |
347 | case FB_VISUAL_PSEUDOCOLOR: | |
348 | fb_logo.needs_cmapreset = 1; | |
349 | break; | |
350 | } | |
351 | } | |
352 | ||
353 | /* Return if no suitable logo was found */ | |
354 | fb_logo.logo = fb_find_logo(depth); | |
355 | ||
356 | if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) { | |
357 | fb_logo.logo = NULL; | |
358 | return 0; | |
359 | } | |
360 | /* What depth we asked for might be different from what we get */ | |
361 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
362 | fb_logo.depth = 8; | |
363 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
364 | fb_logo.depth = 4; | |
365 | else | |
366 | fb_logo.depth = 1; | |
367 | return fb_logo.logo->height; | |
368 | } | |
369 | ||
370 | int fb_show_logo(struct fb_info *info) | |
371 | { | |
372 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
373 | unsigned char *logo_new = NULL; | |
374 | struct fb_image image; | |
375 | int x; | |
376 | ||
377 | /* Return if the frame buffer is not mapped or suspended */ | |
378 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) | |
379 | return 0; | |
380 | ||
381 | image.depth = 8; | |
382 | image.data = fb_logo.logo->data; | |
383 | ||
384 | if (fb_logo.needs_cmapreset) | |
385 | fb_set_logocmap(info, fb_logo.logo); | |
386 | ||
387 | if (fb_logo.needs_truepalette || | |
388 | fb_logo.needs_directpalette) { | |
389 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
390 | if (palette == NULL) | |
391 | return 0; | |
392 | ||
393 | if (fb_logo.needs_truepalette) | |
394 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
395 | else | |
396 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
397 | ||
398 | saved_pseudo_palette = info->pseudo_palette; | |
399 | info->pseudo_palette = palette; | |
400 | } | |
401 | ||
402 | if (fb_logo.depth <= 4) { | |
403 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
404 | GFP_KERNEL); | |
405 | if (logo_new == NULL) { | |
406 | kfree(palette); | |
407 | if (saved_pseudo_palette) | |
408 | info->pseudo_palette = saved_pseudo_palette; | |
409 | return 0; | |
410 | } | |
411 | image.data = logo_new; | |
412 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
413 | } | |
414 | ||
415 | image.width = fb_logo.logo->width; | |
416 | image.height = fb_logo.logo->height; | |
417 | image.dy = 0; | |
418 | ||
419 | for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) && | |
420 | x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) { | |
421 | image.dx = x; | |
422 | info->fbops->fb_imageblit(info, &image); | |
423 | } | |
424 | ||
425 | kfree(palette); | |
426 | if (saved_pseudo_palette != NULL) | |
427 | info->pseudo_palette = saved_pseudo_palette; | |
428 | kfree(logo_new); | |
429 | return fb_logo.logo->height; | |
430 | } | |
431 | #else | |
432 | int fb_prepare_logo(struct fb_info *info) { return 0; } | |
433 | int fb_show_logo(struct fb_info *info) { return 0; } | |
434 | #endif /* CONFIG_LOGO */ | |
435 | ||
436 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
437 | int len, int *eof, void *private) | |
438 | { | |
439 | struct fb_info **fi; | |
440 | int clen; | |
441 | ||
442 | clen = 0; | |
443 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++) | |
444 | if (*fi) | |
445 | clen += sprintf(buf + clen, "%d %s\n", | |
446 | (*fi)->node, | |
447 | (*fi)->fix.id); | |
448 | *start = buf + offset; | |
449 | if (clen > offset) | |
450 | clen -= offset; | |
451 | else | |
452 | clen = 0; | |
453 | return clen < len ? clen : len; | |
454 | } | |
455 | ||
456 | static ssize_t | |
457 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
458 | { | |
459 | unsigned long p = *ppos; | |
460 | struct inode *inode = file->f_dentry->d_inode; | |
461 | int fbidx = iminor(inode); | |
462 | struct fb_info *info = registered_fb[fbidx]; | |
463 | u32 *buffer, *dst; | |
464 | u32 __iomem *src; | |
465 | int c, i, cnt = 0, err = 0; | |
466 | unsigned long total_size; | |
467 | ||
468 | if (!info || ! info->screen_base) | |
469 | return -ENODEV; | |
470 | ||
471 | if (info->state != FBINFO_STATE_RUNNING) | |
472 | return -EPERM; | |
473 | ||
474 | if (info->fbops->fb_read) | |
475 | return info->fbops->fb_read(file, buf, count, ppos); | |
476 | ||
477 | total_size = info->screen_size; | |
478 | if (total_size == 0) | |
479 | total_size = info->fix.smem_len; | |
480 | ||
481 | if (p >= total_size) | |
482 | return 0; | |
483 | if (count >= total_size) | |
484 | count = total_size; | |
485 | if (count + p > total_size) | |
486 | count = total_size - p; | |
487 | ||
488 | cnt = 0; | |
489 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, | |
490 | GFP_KERNEL); | |
491 | if (!buffer) | |
492 | return -ENOMEM; | |
493 | ||
494 | src = (u32 __iomem *) (info->screen_base + p); | |
495 | ||
496 | if (info->fbops->fb_sync) | |
497 | info->fbops->fb_sync(info); | |
498 | ||
499 | while (count) { | |
500 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
501 | dst = buffer; | |
502 | for (i = c >> 2; i--; ) | |
503 | *dst++ = fb_readl(src++); | |
504 | if (c & 3) { | |
505 | u8 *dst8 = (u8 *) dst; | |
506 | u8 __iomem *src8 = (u8 __iomem *) src; | |
507 | ||
508 | for (i = c & 3; i--;) | |
509 | *dst8++ = fb_readb(src8++); | |
510 | ||
511 | src = (u32 __iomem *) src8; | |
512 | } | |
513 | ||
514 | if (copy_to_user(buf, buffer, c)) { | |
515 | err = -EFAULT; | |
516 | break; | |
517 | } | |
518 | *ppos += c; | |
519 | buf += c; | |
520 | cnt += c; | |
521 | count -= c; | |
522 | } | |
523 | ||
524 | kfree(buffer); | |
525 | return (err) ? err : cnt; | |
526 | } | |
527 | ||
528 | static ssize_t | |
529 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
530 | { | |
531 | unsigned long p = *ppos; | |
532 | struct inode *inode = file->f_dentry->d_inode; | |
533 | int fbidx = iminor(inode); | |
534 | struct fb_info *info = registered_fb[fbidx]; | |
535 | u32 *buffer, *src; | |
536 | u32 __iomem *dst; | |
537 | int c, i, cnt = 0, err; | |
538 | unsigned long total_size; | |
539 | ||
540 | if (!info || !info->screen_base) | |
541 | return -ENODEV; | |
542 | ||
543 | if (info->state != FBINFO_STATE_RUNNING) | |
544 | return -EPERM; | |
545 | ||
546 | if (info->fbops->fb_write) | |
547 | return info->fbops->fb_write(file, buf, count, ppos); | |
548 | ||
549 | total_size = info->screen_size; | |
550 | if (total_size == 0) | |
551 | total_size = info->fix.smem_len; | |
552 | ||
553 | if (p > total_size) | |
554 | return -ENOSPC; | |
555 | if (count >= total_size) | |
556 | count = total_size; | |
557 | err = 0; | |
558 | if (count + p > total_size) { | |
559 | count = total_size - p; | |
560 | err = -ENOSPC; | |
561 | } | |
562 | cnt = 0; | |
563 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, | |
564 | GFP_KERNEL); | |
565 | if (!buffer) | |
566 | return -ENOMEM; | |
567 | ||
568 | dst = (u32 __iomem *) (info->screen_base + p); | |
569 | ||
570 | if (info->fbops->fb_sync) | |
571 | info->fbops->fb_sync(info); | |
572 | ||
573 | while (count) { | |
574 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
575 | src = buffer; | |
576 | if (copy_from_user(src, buf, c)) { | |
577 | err = -EFAULT; | |
578 | break; | |
579 | } | |
580 | for (i = c >> 2; i--; ) | |
581 | fb_writel(*src++, dst++); | |
582 | if (c & 3) { | |
583 | u8 *src8 = (u8 *) src; | |
584 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
585 | ||
586 | for (i = c & 3; i--; ) | |
587 | fb_writeb(*src8++, dst8++); | |
588 | ||
589 | dst = (u32 __iomem *) dst8; | |
590 | } | |
591 | *ppos += c; | |
592 | buf += c; | |
593 | cnt += c; | |
594 | count -= c; | |
595 | } | |
596 | kfree(buffer); | |
597 | ||
598 | return (err) ? err : cnt; | |
599 | } | |
600 | ||
601 | #ifdef CONFIG_KMOD | |
602 | static void try_to_load(int fb) | |
603 | { | |
604 | request_module("fb%d", fb); | |
605 | } | |
606 | #endif /* CONFIG_KMOD */ | |
607 | ||
608 | int | |
609 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
610 | { | |
611 | int xoffset = var->xoffset; | |
612 | int yoffset = var->yoffset; | |
613 | int err; | |
614 | ||
615 | if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display || | |
616 | xoffset + info->var.xres > info->var.xres_virtual || | |
617 | yoffset + info->var.yres > info->var.yres_virtual) | |
618 | return -EINVAL; | |
619 | if ((err = info->fbops->fb_pan_display(var, info))) | |
620 | return err; | |
621 | info->var.xoffset = var->xoffset; | |
622 | info->var.yoffset = var->yoffset; | |
623 | if (var->vmode & FB_VMODE_YWRAP) | |
624 | info->var.vmode |= FB_VMODE_YWRAP; | |
625 | else | |
626 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
627 | return 0; | |
628 | } | |
629 | ||
630 | int | |
631 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
632 | { | |
633 | int err; | |
634 | ||
635 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
636 | struct fb_videomode mode1, mode2; | |
637 | int ret = 0; | |
638 | ||
639 | fb_var_to_videomode(&mode1, var); | |
640 | fb_var_to_videomode(&mode2, &info->var); | |
641 | /* make sure we don't delete the videomode of current var */ | |
642 | ret = fb_mode_is_equal(&mode1, &mode2); | |
643 | ||
644 | if (!ret) { | |
645 | struct fb_event event; | |
646 | ||
647 | event.info = info; | |
648 | event.data = &mode1; | |
649 | ret = notifier_call_chain(&fb_notifier_list, | |
650 | FB_EVENT_MODE_DELETE, &event); | |
651 | } | |
652 | ||
653 | if (!ret) | |
654 | fb_delete_videomode(&mode1, &info->modelist); | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
659 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
660 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
661 | if (!info->fbops->fb_check_var) { | |
662 | *var = info->var; | |
663 | return 0; | |
664 | } | |
665 | ||
666 | if ((err = info->fbops->fb_check_var(var, info))) | |
667 | return err; | |
668 | ||
669 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
670 | struct fb_videomode mode; | |
671 | int err = 0; | |
672 | ||
673 | info->var = *var; | |
674 | if (info->fbops->fb_set_par) | |
675 | info->fbops->fb_set_par(info); | |
676 | ||
677 | fb_pan_display(info, &info->var); | |
678 | ||
679 | fb_set_cmap(&info->cmap, info); | |
680 | ||
681 | fb_var_to_videomode(&mode, &info->var); | |
682 | ||
683 | if (info->modelist.prev && info->modelist.next && | |
684 | !list_empty(&info->modelist)) | |
685 | err = fb_add_videomode(&mode, &info->modelist); | |
686 | ||
687 | if (!err && info->flags & FBINFO_MISC_USEREVENT) { | |
688 | struct fb_event event; | |
689 | ||
690 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
691 | event.info = info; | |
692 | notifier_call_chain(&fb_notifier_list, | |
693 | FB_EVENT_MODE_CHANGE, | |
694 | &event); | |
695 | } | |
696 | } | |
697 | } | |
698 | return 0; | |
699 | } | |
700 | ||
701 | int | |
702 | fb_blank(struct fb_info *info, int blank) | |
703 | { | |
704 | int ret = -EINVAL; | |
705 | ||
706 | if (blank > FB_BLANK_POWERDOWN) | |
707 | blank = FB_BLANK_POWERDOWN; | |
708 | ||
709 | if (info->fbops->fb_blank) | |
710 | ret = info->fbops->fb_blank(blank, info); | |
711 | ||
712 | if (!ret) { | |
713 | struct fb_event event; | |
714 | ||
715 | event.info = info; | |
716 | event.data = ␣ | |
717 | notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event); | |
718 | } | |
719 | ||
720 | return ret; | |
721 | } | |
722 | ||
723 | static int | |
724 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
725 | unsigned long arg) | |
726 | { | |
727 | int fbidx = iminor(inode); | |
728 | struct fb_info *info = registered_fb[fbidx]; | |
729 | struct fb_ops *fb = info->fbops; | |
730 | struct fb_var_screeninfo var; | |
731 | struct fb_fix_screeninfo fix; | |
732 | struct fb_con2fbmap con2fb; | |
733 | struct fb_cmap_user cmap; | |
734 | struct fb_event event; | |
735 | void __user *argp = (void __user *)arg; | |
736 | int i; | |
737 | ||
738 | if (!fb) | |
739 | return -ENODEV; | |
740 | switch (cmd) { | |
741 | case FBIOGET_VSCREENINFO: | |
742 | return copy_to_user(argp, &info->var, | |
743 | sizeof(var)) ? -EFAULT : 0; | |
744 | case FBIOPUT_VSCREENINFO: | |
745 | if (copy_from_user(&var, argp, sizeof(var))) | |
746 | return -EFAULT; | |
747 | acquire_console_sem(); | |
748 | info->flags |= FBINFO_MISC_USEREVENT; | |
749 | i = fb_set_var(info, &var); | |
750 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
751 | release_console_sem(); | |
752 | if (i) return i; | |
753 | if (copy_to_user(argp, &var, sizeof(var))) | |
754 | return -EFAULT; | |
755 | return 0; | |
756 | case FBIOGET_FSCREENINFO: | |
757 | return copy_to_user(argp, &info->fix, | |
758 | sizeof(fix)) ? -EFAULT : 0; | |
759 | case FBIOPUTCMAP: | |
760 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
761 | return -EFAULT; | |
762 | return (fb_set_user_cmap(&cmap, info)); | |
763 | case FBIOGETCMAP: | |
764 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
765 | return -EFAULT; | |
766 | return fb_cmap_to_user(&info->cmap, &cmap); | |
767 | case FBIOPAN_DISPLAY: | |
768 | if (copy_from_user(&var, argp, sizeof(var))) | |
769 | return -EFAULT; | |
770 | acquire_console_sem(); | |
771 | i = fb_pan_display(info, &var); | |
772 | release_console_sem(); | |
773 | if (i) | |
774 | return i; | |
775 | if (copy_to_user(argp, &var, sizeof(var))) | |
776 | return -EFAULT; | |
777 | return 0; | |
778 | case FBIO_CURSOR: | |
779 | return -EINVAL; | |
780 | case FBIOGET_CON2FBMAP: | |
781 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
782 | return -EFAULT; | |
783 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
784 | return -EINVAL; | |
785 | con2fb.framebuffer = -1; | |
786 | event.info = info; | |
787 | event.data = &con2fb; | |
788 | notifier_call_chain(&fb_notifier_list, | |
789 | FB_EVENT_GET_CONSOLE_MAP, &event); | |
790 | return copy_to_user(argp, &con2fb, | |
791 | sizeof(con2fb)) ? -EFAULT : 0; | |
792 | case FBIOPUT_CON2FBMAP: | |
793 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
794 | return - EFAULT; | |
795 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
796 | return -EINVAL; | |
797 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
798 | return -EINVAL; | |
799 | #ifdef CONFIG_KMOD | |
800 | if (!registered_fb[con2fb.framebuffer]) | |
801 | try_to_load(con2fb.framebuffer); | |
802 | #endif /* CONFIG_KMOD */ | |
803 | if (!registered_fb[con2fb.framebuffer]) | |
804 | return -EINVAL; | |
805 | event.info = info; | |
806 | event.data = &con2fb; | |
807 | return notifier_call_chain(&fb_notifier_list, | |
808 | FB_EVENT_SET_CONSOLE_MAP, | |
809 | &event); | |
810 | case FBIOBLANK: | |
811 | acquire_console_sem(); | |
812 | info->flags |= FBINFO_MISC_USEREVENT; | |
813 | i = fb_blank(info, arg); | |
814 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
815 | release_console_sem(); | |
816 | return i; | |
817 | default: | |
818 | if (fb->fb_ioctl == NULL) | |
819 | return -EINVAL; | |
820 | return fb->fb_ioctl(inode, file, cmd, arg, info); | |
821 | } | |
822 | } | |
823 | ||
824 | #ifdef CONFIG_COMPAT | |
825 | static long | |
826 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
827 | { | |
828 | int fbidx = iminor(file->f_dentry->d_inode); | |
829 | struct fb_info *info = registered_fb[fbidx]; | |
830 | struct fb_ops *fb = info->fbops; | |
831 | long ret; | |
832 | ||
833 | if (fb->fb_compat_ioctl == NULL) | |
834 | return -ENOIOCTLCMD; | |
835 | lock_kernel(); | |
836 | ret = fb->fb_compat_ioctl(file, cmd, arg, info); | |
837 | unlock_kernel(); | |
838 | return ret; | |
839 | } | |
840 | #endif | |
841 | ||
842 | static int | |
843 | fb_mmap(struct file *file, struct vm_area_struct * vma) | |
844 | { | |
845 | int fbidx = iminor(file->f_dentry->d_inode); | |
846 | struct fb_info *info = registered_fb[fbidx]; | |
847 | struct fb_ops *fb = info->fbops; | |
848 | unsigned long off; | |
849 | #if !defined(__sparc__) || defined(__sparc_v9__) | |
850 | unsigned long start; | |
851 | u32 len; | |
852 | #endif | |
853 | ||
854 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
855 | return -EINVAL; | |
856 | off = vma->vm_pgoff << PAGE_SHIFT; | |
857 | if (!fb) | |
858 | return -ENODEV; | |
859 | if (fb->fb_mmap) { | |
860 | int res; | |
861 | lock_kernel(); | |
862 | res = fb->fb_mmap(info, file, vma); | |
863 | unlock_kernel(); | |
864 | return res; | |
865 | } | |
866 | ||
867 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
868 | /* Should never get here, all fb drivers should have their own | |
869 | mmap routines */ | |
870 | return -EINVAL; | |
871 | #else | |
872 | /* !sparc32... */ | |
873 | lock_kernel(); | |
874 | ||
875 | /* frame buffer memory */ | |
876 | start = info->fix.smem_start; | |
877 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
878 | if (off >= len) { | |
879 | /* memory mapped io */ | |
880 | off -= len; | |
881 | if (info->var.accel_flags) { | |
882 | unlock_kernel(); | |
883 | return -EINVAL; | |
884 | } | |
885 | start = info->fix.mmio_start; | |
886 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
887 | } | |
888 | unlock_kernel(); | |
889 | start &= PAGE_MASK; | |
890 | if ((vma->vm_end - vma->vm_start + off) > len) | |
891 | return -EINVAL; | |
892 | off += start; | |
893 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
894 | /* This is an IO map - tell maydump to skip this VMA */ | |
895 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
896 | #if defined(__sparc_v9__) | |
897 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
898 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
899 | return -EAGAIN; | |
900 | #else | |
901 | #if defined(__mc68000__) | |
902 | #if defined(CONFIG_SUN3) | |
903 | pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; | |
904 | #elif defined(CONFIG_MMU) | |
905 | if (CPU_IS_020_OR_030) | |
906 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; | |
907 | if (CPU_IS_040_OR_060) { | |
908 | pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; | |
909 | /* Use no-cache mode, serialized */ | |
910 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; | |
911 | } | |
912 | #endif | |
913 | #elif defined(__powerpc__) | |
914 | vma->vm_page_prot = phys_mem_access_prot(file, off, | |
915 | vma->vm_end - vma->vm_start, | |
916 | vma->vm_page_prot); | |
917 | #elif defined(__alpha__) | |
918 | /* Caching is off in the I/O space quadrant by design. */ | |
919 | #elif defined(__i386__) || defined(__x86_64__) | |
920 | if (boot_cpu_data.x86 > 3) | |
921 | pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; | |
922 | #elif defined(__mips__) | |
923 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
924 | #elif defined(__hppa__) | |
925 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
926 | #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) | |
927 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
928 | #elif defined(__ia64__) | |
929 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) | |
930 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
931 | else | |
932 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
933 | #else | |
934 | #warning What do we have to do here?? | |
935 | #endif | |
936 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
937 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
938 | return -EAGAIN; | |
939 | #endif /* !__sparc_v9__ */ | |
940 | return 0; | |
941 | #endif /* !sparc32 */ | |
942 | } | |
943 | ||
944 | static int | |
945 | fb_open(struct inode *inode, struct file *file) | |
946 | { | |
947 | int fbidx = iminor(inode); | |
948 | struct fb_info *info; | |
949 | int res = 0; | |
950 | ||
951 | if (fbidx >= FB_MAX) | |
952 | return -ENODEV; | |
953 | #ifdef CONFIG_KMOD | |
954 | if (!(info = registered_fb[fbidx])) | |
955 | try_to_load(fbidx); | |
956 | #endif /* CONFIG_KMOD */ | |
957 | if (!(info = registered_fb[fbidx])) | |
958 | return -ENODEV; | |
959 | if (!try_module_get(info->fbops->owner)) | |
960 | return -ENODEV; | |
961 | if (info->fbops->fb_open) { | |
962 | res = info->fbops->fb_open(info,1); | |
963 | if (res) | |
964 | module_put(info->fbops->owner); | |
965 | } | |
966 | return res; | |
967 | } | |
968 | ||
969 | static int | |
970 | fb_release(struct inode *inode, struct file *file) | |
971 | { | |
972 | int fbidx = iminor(inode); | |
973 | struct fb_info *info; | |
974 | ||
975 | lock_kernel(); | |
976 | info = registered_fb[fbidx]; | |
977 | if (info->fbops->fb_release) | |
978 | info->fbops->fb_release(info,1); | |
979 | module_put(info->fbops->owner); | |
980 | unlock_kernel(); | |
981 | return 0; | |
982 | } | |
983 | ||
984 | static struct file_operations fb_fops = { | |
985 | .owner = THIS_MODULE, | |
986 | .read = fb_read, | |
987 | .write = fb_write, | |
988 | .ioctl = fb_ioctl, | |
989 | #ifdef CONFIG_COMPAT | |
990 | .compat_ioctl = fb_compat_ioctl, | |
991 | #endif | |
992 | .mmap = fb_mmap, | |
993 | .open = fb_open, | |
994 | .release = fb_release, | |
995 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
996 | .get_unmapped_area = get_fb_unmapped_area, | |
997 | #endif | |
998 | }; | |
999 | ||
56b22935 | 1000 | static struct class *fb_class; |
1da177e4 LT |
1001 | |
1002 | /** | |
1003 | * register_framebuffer - registers a frame buffer device | |
1004 | * @fb_info: frame buffer info structure | |
1005 | * | |
1006 | * Registers a frame buffer device @fb_info. | |
1007 | * | |
1008 | * Returns negative errno on error, or zero for success. | |
1009 | * | |
1010 | */ | |
1011 | ||
1012 | int | |
1013 | register_framebuffer(struct fb_info *fb_info) | |
1014 | { | |
1015 | int i; | |
1016 | struct fb_event event; | |
1017 | ||
1018 | if (num_registered_fb == FB_MAX) | |
1019 | return -ENXIO; | |
1020 | num_registered_fb++; | |
1021 | for (i = 0 ; i < FB_MAX; i++) | |
1022 | if (!registered_fb[i]) | |
1023 | break; | |
1024 | fb_info->node = i; | |
1025 | ||
56b22935 | 1026 | fb_info->class_device = class_device_create(fb_class, MKDEV(FB_MAJOR, i), |
1da177e4 LT |
1027 | fb_info->device, "fb%d", i); |
1028 | if (IS_ERR(fb_info->class_device)) { | |
1029 | /* Not fatal */ | |
1030 | printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device)); | |
1031 | fb_info->class_device = NULL; | |
1032 | } else | |
1033 | fb_init_class_device(fb_info); | |
1034 | ||
1035 | if (fb_info->pixmap.addr == NULL) { | |
1036 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1037 | if (fb_info->pixmap.addr) { | |
1038 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1039 | fb_info->pixmap.buf_align = 1; | |
1040 | fb_info->pixmap.scan_align = 1; | |
1041 | fb_info->pixmap.access_align = 4; | |
1042 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; | |
1043 | } | |
1044 | } | |
1045 | fb_info->pixmap.offset = 0; | |
1046 | ||
1047 | if (!fb_info->modelist.prev || | |
1048 | !fb_info->modelist.next || | |
1049 | list_empty(&fb_info->modelist)) { | |
1050 | struct fb_videomode mode; | |
1051 | ||
1052 | INIT_LIST_HEAD(&fb_info->modelist); | |
1053 | fb_var_to_videomode(&mode, &fb_info->var); | |
1054 | fb_add_videomode(&mode, &fb_info->modelist); | |
1055 | } | |
1056 | ||
1057 | registered_fb[i] = fb_info; | |
1058 | ||
1059 | devfs_mk_cdev(MKDEV(FB_MAJOR, i), | |
1060 | S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); | |
1061 | event.info = fb_info; | |
1062 | notifier_call_chain(&fb_notifier_list, | |
1063 | FB_EVENT_FB_REGISTERED, &event); | |
1064 | return 0; | |
1065 | } | |
1066 | ||
1067 | ||
1068 | /** | |
1069 | * unregister_framebuffer - releases a frame buffer device | |
1070 | * @fb_info: frame buffer info structure | |
1071 | * | |
1072 | * Unregisters a frame buffer device @fb_info. | |
1073 | * | |
1074 | * Returns negative errno on error, or zero for success. | |
1075 | * | |
1076 | */ | |
1077 | ||
1078 | int | |
1079 | unregister_framebuffer(struct fb_info *fb_info) | |
1080 | { | |
1081 | int i; | |
1082 | ||
1083 | i = fb_info->node; | |
1084 | if (!registered_fb[i]) | |
1085 | return -EINVAL; | |
1086 | devfs_remove("fb/%d", i); | |
1087 | ||
1088 | if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1089 | kfree(fb_info->pixmap.addr); | |
1090 | fb_destroy_modelist(&fb_info->modelist); | |
1091 | registered_fb[i]=NULL; | |
1092 | num_registered_fb--; | |
1093 | fb_cleanup_class_device(fb_info); | |
56b22935 | 1094 | class_device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
1da177e4 LT |
1095 | return 0; |
1096 | } | |
1097 | ||
1098 | /** | |
1099 | * fb_register_client - register a client notifier | |
1100 | * @nb: notifier block to callback on events | |
1101 | */ | |
1102 | int fb_register_client(struct notifier_block *nb) | |
1103 | { | |
1104 | return notifier_chain_register(&fb_notifier_list, nb); | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * fb_unregister_client - unregister a client notifier | |
1109 | * @nb: notifier block to callback on events | |
1110 | */ | |
1111 | int fb_unregister_client(struct notifier_block *nb) | |
1112 | { | |
1113 | return notifier_chain_unregister(&fb_notifier_list, nb); | |
1114 | } | |
1115 | ||
1116 | /** | |
1117 | * fb_set_suspend - low level driver signals suspend | |
1118 | * @info: framebuffer affected | |
1119 | * @state: 0 = resuming, !=0 = suspending | |
1120 | * | |
1121 | * This is meant to be used by low level drivers to | |
1122 | * signal suspend/resume to the core & clients. | |
1123 | * It must be called with the console semaphore held | |
1124 | */ | |
1125 | void fb_set_suspend(struct fb_info *info, int state) | |
1126 | { | |
1127 | struct fb_event event; | |
1128 | ||
1129 | event.info = info; | |
1130 | if (state) { | |
1131 | notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event); | |
1132 | info->state = FBINFO_STATE_SUSPENDED; | |
1133 | } else { | |
1134 | info->state = FBINFO_STATE_RUNNING; | |
1135 | notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event); | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | /** | |
1140 | * fbmem_init - init frame buffer subsystem | |
1141 | * | |
1142 | * Initialize the frame buffer subsystem. | |
1143 | * | |
1144 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1145 | * | |
1146 | */ | |
1147 | ||
1148 | static int __init | |
1149 | fbmem_init(void) | |
1150 | { | |
1151 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1152 | ||
1153 | devfs_mk_dir("fb"); | |
1154 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) | |
1155 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1156 | ||
56b22935 | 1157 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1158 | if (IS_ERR(fb_class)) { |
1159 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1160 | fb_class = NULL; | |
1161 | } | |
1162 | return 0; | |
1163 | } | |
1164 | ||
1165 | #ifdef MODULE | |
1166 | module_init(fbmem_init); | |
1167 | static void __exit | |
1168 | fbmem_exit(void) | |
1169 | { | |
56b22935 | 1170 | class_destroy(fb_class); |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | module_exit(fbmem_exit); | |
1174 | MODULE_LICENSE("GPL"); | |
1175 | MODULE_DESCRIPTION("Framebuffer base"); | |
1176 | #else | |
1177 | subsys_initcall(fbmem_init); | |
1178 | #endif | |
1179 | ||
1180 | int fb_new_modelist(struct fb_info *info) | |
1181 | { | |
1182 | struct fb_event event; | |
1183 | struct fb_var_screeninfo var = info->var; | |
1184 | struct list_head *pos, *n; | |
1185 | struct fb_modelist *modelist; | |
1186 | struct fb_videomode *m, mode; | |
1187 | int err = 1; | |
1188 | ||
1189 | list_for_each_safe(pos, n, &info->modelist) { | |
1190 | modelist = list_entry(pos, struct fb_modelist, list); | |
1191 | m = &modelist->mode; | |
1192 | fb_videomode_to_var(&var, m); | |
1193 | var.activate = FB_ACTIVATE_TEST; | |
1194 | err = fb_set_var(info, &var); | |
1195 | fb_var_to_videomode(&mode, &var); | |
1196 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1197 | list_del(pos); | |
1198 | kfree(pos); | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | err = 1; | |
1203 | ||
1204 | if (!list_empty(&info->modelist)) { | |
1205 | event.info = info; | |
1206 | err = notifier_call_chain(&fb_notifier_list, | |
1207 | FB_EVENT_NEW_MODELIST, | |
1208 | &event); | |
1209 | } | |
1210 | ||
1211 | return err; | |
1212 | } | |
1213 | ||
1214 | static char *video_options[FB_MAX]; | |
1215 | static int ofonly; | |
1216 | ||
4dc3b16b PP |
1217 | extern const char *global_mode_option; |
1218 | ||
1da177e4 LT |
1219 | /** |
1220 | * fb_get_options - get kernel boot parameters | |
1221 | * @name: framebuffer name as it would appear in | |
1222 | * the boot parameter line | |
1223 | * (video=<name>:<options>) | |
1224 | * @option: the option will be stored here | |
1225 | * | |
1226 | * NOTE: Needed to maintain backwards compatibility | |
1227 | */ | |
1228 | int fb_get_options(char *name, char **option) | |
1229 | { | |
1230 | char *opt, *options = NULL; | |
1231 | int opt_len, retval = 0; | |
1232 | int name_len = strlen(name), i; | |
1233 | ||
1234 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1235 | retval = 1; | |
1236 | ||
1237 | if (name_len && !retval) { | |
1238 | for (i = 0; i < FB_MAX; i++) { | |
1239 | if (video_options[i] == NULL) | |
1240 | continue; | |
1241 | opt_len = strlen(video_options[i]); | |
1242 | if (!opt_len) | |
1243 | continue; | |
1244 | opt = video_options[i]; | |
1245 | if (!strncmp(name, opt, name_len) && | |
1246 | opt[name_len] == ':') | |
1247 | options = opt + name_len + 1; | |
1248 | } | |
1249 | } | |
1250 | if (options && !strncmp(options, "off", 3)) | |
1251 | retval = 1; | |
1252 | ||
1253 | if (option) | |
1254 | *option = options; | |
1255 | ||
1256 | return retval; | |
1257 | } | |
1258 | ||
1da177e4 LT |
1259 | /** |
1260 | * video_setup - process command line options | |
1261 | * @options: string of options | |
1262 | * | |
1263 | * Process command line options for frame buffer subsystem. | |
1264 | * | |
1265 | * NOTE: This function is a __setup and __init function. | |
1266 | * It only stores the options. Drivers have to call | |
1267 | * fb_get_options() as necessary. | |
1268 | * | |
1269 | * Returns zero. | |
1270 | * | |
1271 | */ | |
75c96f85 | 1272 | static int __init video_setup(char *options) |
1da177e4 LT |
1273 | { |
1274 | int i, global = 0; | |
1275 | ||
1276 | if (!options || !*options) | |
1277 | global = 1; | |
1278 | ||
1279 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1280 | ofonly = 1; | |
1281 | global = 1; | |
1282 | } | |
1283 | ||
1284 | if (!global && !strstr(options, "fb:")) { | |
1285 | global_mode_option = options; | |
1286 | global = 1; | |
1287 | } | |
1288 | ||
1289 | if (!global) { | |
1290 | for (i = 0; i < FB_MAX; i++) { | |
1291 | if (video_options[i] == NULL) { | |
1292 | video_options[i] = options; | |
1293 | break; | |
1294 | } | |
1295 | ||
1296 | } | |
1297 | } | |
1298 | ||
1299 | return 0; | |
1300 | } | |
1301 | __setup("video=", video_setup); | |
1302 | ||
1303 | /* | |
1304 | * Visible symbols for modules | |
1305 | */ | |
1306 | ||
1307 | EXPORT_SYMBOL(register_framebuffer); | |
1308 | EXPORT_SYMBOL(unregister_framebuffer); | |
1309 | EXPORT_SYMBOL(num_registered_fb); | |
1310 | EXPORT_SYMBOL(registered_fb); | |
1311 | EXPORT_SYMBOL(fb_prepare_logo); | |
1312 | EXPORT_SYMBOL(fb_show_logo); | |
1313 | EXPORT_SYMBOL(fb_set_var); | |
1314 | EXPORT_SYMBOL(fb_blank); | |
1315 | EXPORT_SYMBOL(fb_pan_display); | |
1316 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 LT |
1317 | EXPORT_SYMBOL(fb_set_suspend); |
1318 | EXPORT_SYMBOL(fb_register_client); | |
1319 | EXPORT_SYMBOL(fb_unregister_client); | |
1320 | EXPORT_SYMBOL(fb_get_options); | |
1321 | EXPORT_SYMBOL(fb_new_modelist); | |
1322 | ||
1323 | MODULE_LICENSE("GPL"); |