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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 | */ |
f1ab5dac | 81 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 82 | { |
f5a9951c | 83 | int i; |
1da177e4 LT |
84 | |
85 | for (i = height; i--; ) { | |
f5a9951c | 86 | memcpy(dst, src, s_pitch); |
1da177e4 LT |
87 | src += s_pitch; |
88 | dst += d_pitch; | |
89 | } | |
90 | } | |
f1ab5dac | 91 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 92 | |
f1ab5dac JS |
93 | void 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 | 121 | EXPORT_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 | */ | |
127 | char* 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 | |
160 | #include <linux/linux_logo.h> | |
161 | ||
162 | static inline unsigned safe_shift(unsigned d, int n) | |
163 | { | |
164 | return n < 0 ? d >> -n : d << n; | |
165 | } | |
166 | ||
167 | static void fb_set_logocmap(struct fb_info *info, | |
168 | const struct linux_logo *logo) | |
169 | { | |
170 | struct fb_cmap palette_cmap; | |
171 | u16 palette_green[16]; | |
172 | u16 palette_blue[16]; | |
173 | u16 palette_red[16]; | |
174 | int i, j, n; | |
175 | const unsigned char *clut = logo->clut; | |
176 | ||
177 | palette_cmap.start = 0; | |
178 | palette_cmap.len = 16; | |
179 | palette_cmap.red = palette_red; | |
180 | palette_cmap.green = palette_green; | |
181 | palette_cmap.blue = palette_blue; | |
182 | palette_cmap.transp = NULL; | |
183 | ||
184 | for (i = 0; i < logo->clutsize; i += n) { | |
185 | n = logo->clutsize - i; | |
186 | /* palette_cmap provides space for only 16 colors at once */ | |
187 | if (n > 16) | |
188 | n = 16; | |
189 | palette_cmap.start = 32 + i; | |
190 | palette_cmap.len = n; | |
191 | for (j = 0; j < n; ++j) { | |
192 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
193 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
194 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
195 | clut += 3; | |
196 | } | |
197 | fb_set_cmap(&palette_cmap, info); | |
198 | } | |
199 | } | |
200 | ||
201 | static void fb_set_logo_truepalette(struct fb_info *info, | |
202 | const struct linux_logo *logo, | |
203 | u32 *palette) | |
204 | { | |
205 | unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; | |
206 | unsigned char redmask, greenmask, bluemask; | |
207 | int redshift, greenshift, blueshift; | |
208 | int i; | |
209 | const unsigned char *clut = logo->clut; | |
210 | ||
211 | /* | |
212 | * We have to create a temporary palette since console palette is only | |
213 | * 16 colors long. | |
214 | */ | |
215 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
216 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
217 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
218 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
219 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
220 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
221 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
222 | ||
223 | for ( i = 0; i < logo->clutsize; i++) { | |
224 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
225 | safe_shift((clut[1] & greenmask), greenshift) | | |
226 | safe_shift((clut[2] & bluemask), blueshift)); | |
227 | clut += 3; | |
228 | } | |
229 | } | |
230 | ||
231 | static void fb_set_logo_directpalette(struct fb_info *info, | |
232 | const struct linux_logo *logo, | |
233 | u32 *palette) | |
234 | { | |
235 | int redshift, greenshift, blueshift; | |
236 | int i; | |
237 | ||
238 | redshift = info->var.red.offset; | |
239 | greenshift = info->var.green.offset; | |
240 | blueshift = info->var.blue.offset; | |
241 | ||
242 | for (i = 32; i < logo->clutsize; i++) | |
243 | palette[i] = i << redshift | i << greenshift | i << blueshift; | |
244 | } | |
245 | ||
246 | static void fb_set_logo(struct fb_info *info, | |
247 | const struct linux_logo *logo, u8 *dst, | |
248 | int depth) | |
249 | { | |
250 | int i, j, k, fg = 1; | |
251 | const u8 *src = logo->data; | |
252 | u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; | |
253 | ||
254 | if (fb_get_color_depth(&info->var) == 3) | |
255 | fg = 7; | |
256 | ||
257 | switch (depth) { | |
258 | case 4: | |
259 | for (i = 0; i < logo->height; i++) | |
260 | for (j = 0; j < logo->width; src++) { | |
261 | *dst++ = *src >> 4; | |
262 | j++; | |
263 | if (j < logo->width) { | |
264 | *dst++ = *src & 0x0f; | |
265 | j++; | |
266 | } | |
267 | } | |
268 | break; | |
269 | case 1: | |
270 | for (i = 0; i < logo->height; i++) { | |
271 | for (j = 0; j < logo->width; src++) { | |
272 | d = *src ^ xor; | |
273 | for (k = 7; k >= 0; k--) { | |
274 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
275 | j++; | |
276 | } | |
277 | } | |
278 | } | |
279 | break; | |
280 | } | |
281 | } | |
282 | ||
283 | /* | |
284 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
285 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
286 | * the visual format and color depth of the framebuffer, the DAC, the | |
287 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
288 | * | |
289 | * Case 1 - linux_logo_clut224: | |
290 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
291 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
292 | * | |
293 | * For visuals that require color info from the pseudo_palette, we also construct | |
294 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
295 | * will be set. | |
296 | * | |
297 | * Case 2 - linux_logo_vga16: | |
298 | * The number of colors just matches the console colors, thus there is no need | |
299 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
300 | * each byte contains color information for two pixels (upper and lower nibble). | |
301 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
302 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
303 | * | |
304 | * Case 3 - linux_logo_mono: | |
305 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
306 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
307 | * be set to 1. | |
308 | */ | |
309 | static struct logo_data { | |
310 | int depth; | |
311 | int needs_directpalette; | |
312 | int needs_truepalette; | |
313 | int needs_cmapreset; | |
314 | const struct linux_logo *logo; | |
315 | } fb_logo; | |
316 | ||
317 | int fb_prepare_logo(struct fb_info *info) | |
318 | { | |
319 | int depth = fb_get_color_depth(&info->var); | |
320 | ||
321 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
322 | ||
323 | if (info->flags & FBINFO_MISC_TILEBLITTING) | |
324 | return 0; | |
325 | ||
326 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
327 | depth = info->var.blue.length; | |
328 | if (info->var.red.length < depth) | |
329 | depth = info->var.red.length; | |
330 | if (info->var.green.length < depth) | |
331 | depth = info->var.green.length; | |
332 | } | |
333 | ||
334 | if (depth >= 8) { | |
335 | switch (info->fix.visual) { | |
336 | case FB_VISUAL_TRUECOLOR: | |
337 | fb_logo.needs_truepalette = 1; | |
338 | break; | |
339 | case FB_VISUAL_DIRECTCOLOR: | |
340 | fb_logo.needs_directpalette = 1; | |
341 | fb_logo.needs_cmapreset = 1; | |
342 | break; | |
343 | case FB_VISUAL_PSEUDOCOLOR: | |
344 | fb_logo.needs_cmapreset = 1; | |
345 | break; | |
346 | } | |
347 | } | |
348 | ||
349 | /* Return if no suitable logo was found */ | |
350 | fb_logo.logo = fb_find_logo(depth); | |
351 | ||
352 | if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) { | |
353 | fb_logo.logo = NULL; | |
354 | return 0; | |
355 | } | |
356 | /* What depth we asked for might be different from what we get */ | |
357 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
358 | fb_logo.depth = 8; | |
359 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
360 | fb_logo.depth = 4; | |
361 | else | |
362 | fb_logo.depth = 1; | |
363 | return fb_logo.logo->height; | |
364 | } | |
365 | ||
366 | int fb_show_logo(struct fb_info *info) | |
367 | { | |
368 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
369 | unsigned char *logo_new = NULL; | |
370 | struct fb_image image; | |
371 | int x; | |
372 | ||
373 | /* Return if the frame buffer is not mapped or suspended */ | |
374 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) | |
375 | return 0; | |
376 | ||
377 | image.depth = 8; | |
378 | image.data = fb_logo.logo->data; | |
379 | ||
380 | if (fb_logo.needs_cmapreset) | |
381 | fb_set_logocmap(info, fb_logo.logo); | |
382 | ||
383 | if (fb_logo.needs_truepalette || | |
384 | fb_logo.needs_directpalette) { | |
385 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
386 | if (palette == NULL) | |
387 | return 0; | |
388 | ||
389 | if (fb_logo.needs_truepalette) | |
390 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
391 | else | |
392 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
393 | ||
394 | saved_pseudo_palette = info->pseudo_palette; | |
395 | info->pseudo_palette = palette; | |
396 | } | |
397 | ||
398 | if (fb_logo.depth <= 4) { | |
399 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
400 | GFP_KERNEL); | |
401 | if (logo_new == NULL) { | |
402 | kfree(palette); | |
403 | if (saved_pseudo_palette) | |
404 | info->pseudo_palette = saved_pseudo_palette; | |
405 | return 0; | |
406 | } | |
407 | image.data = logo_new; | |
408 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
409 | } | |
410 | ||
411 | image.width = fb_logo.logo->width; | |
412 | image.height = fb_logo.logo->height; | |
413 | image.dy = 0; | |
414 | ||
415 | for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) && | |
416 | x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) { | |
417 | image.dx = x; | |
418 | info->fbops->fb_imageblit(info, &image); | |
419 | } | |
420 | ||
421 | kfree(palette); | |
422 | if (saved_pseudo_palette != NULL) | |
423 | info->pseudo_palette = saved_pseudo_palette; | |
424 | kfree(logo_new); | |
425 | return fb_logo.logo->height; | |
426 | } | |
427 | #else | |
428 | int fb_prepare_logo(struct fb_info *info) { return 0; } | |
429 | int fb_show_logo(struct fb_info *info) { return 0; } | |
430 | #endif /* CONFIG_LOGO */ | |
431 | ||
432 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
433 | int len, int *eof, void *private) | |
434 | { | |
435 | struct fb_info **fi; | |
436 | int clen; | |
437 | ||
438 | clen = 0; | |
439 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++) | |
440 | if (*fi) | |
441 | clen += sprintf(buf + clen, "%d %s\n", | |
442 | (*fi)->node, | |
443 | (*fi)->fix.id); | |
444 | *start = buf + offset; | |
445 | if (clen > offset) | |
446 | clen -= offset; | |
447 | else | |
448 | clen = 0; | |
449 | return clen < len ? clen : len; | |
450 | } | |
451 | ||
452 | static ssize_t | |
453 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
454 | { | |
455 | unsigned long p = *ppos; | |
456 | struct inode *inode = file->f_dentry->d_inode; | |
457 | int fbidx = iminor(inode); | |
458 | struct fb_info *info = registered_fb[fbidx]; | |
459 | u32 *buffer, *dst; | |
460 | u32 __iomem *src; | |
461 | int c, i, cnt = 0, err = 0; | |
462 | unsigned long total_size; | |
463 | ||
464 | if (!info || ! info->screen_base) | |
465 | return -ENODEV; | |
466 | ||
467 | if (info->state != FBINFO_STATE_RUNNING) | |
468 | return -EPERM; | |
469 | ||
470 | if (info->fbops->fb_read) | |
471 | return info->fbops->fb_read(file, buf, count, ppos); | |
472 | ||
473 | total_size = info->screen_size; | |
474 | if (total_size == 0) | |
475 | total_size = info->fix.smem_len; | |
476 | ||
477 | if (p >= total_size) | |
478 | return 0; | |
479 | if (count >= total_size) | |
480 | count = total_size; | |
481 | if (count + p > total_size) | |
482 | count = total_size - p; | |
483 | ||
484 | cnt = 0; | |
485 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, | |
486 | GFP_KERNEL); | |
487 | if (!buffer) | |
488 | return -ENOMEM; | |
489 | ||
490 | src = (u32 __iomem *) (info->screen_base + p); | |
491 | ||
492 | if (info->fbops->fb_sync) | |
493 | info->fbops->fb_sync(info); | |
494 | ||
495 | while (count) { | |
496 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
497 | dst = buffer; | |
498 | for (i = c >> 2; i--; ) | |
499 | *dst++ = fb_readl(src++); | |
500 | if (c & 3) { | |
501 | u8 *dst8 = (u8 *) dst; | |
502 | u8 __iomem *src8 = (u8 __iomem *) src; | |
503 | ||
504 | for (i = c & 3; i--;) | |
505 | *dst8++ = fb_readb(src8++); | |
506 | ||
507 | src = (u32 __iomem *) src8; | |
508 | } | |
509 | ||
510 | if (copy_to_user(buf, buffer, c)) { | |
511 | err = -EFAULT; | |
512 | break; | |
513 | } | |
514 | *ppos += c; | |
515 | buf += c; | |
516 | cnt += c; | |
517 | count -= c; | |
518 | } | |
519 | ||
520 | kfree(buffer); | |
521 | return (err) ? err : cnt; | |
522 | } | |
523 | ||
524 | static ssize_t | |
525 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
526 | { | |
527 | unsigned long p = *ppos; | |
528 | struct inode *inode = file->f_dentry->d_inode; | |
529 | int fbidx = iminor(inode); | |
530 | struct fb_info *info = registered_fb[fbidx]; | |
531 | u32 *buffer, *src; | |
532 | u32 __iomem *dst; | |
533 | int c, i, cnt = 0, err; | |
534 | unsigned long total_size; | |
535 | ||
536 | if (!info || !info->screen_base) | |
537 | return -ENODEV; | |
538 | ||
539 | if (info->state != FBINFO_STATE_RUNNING) | |
540 | return -EPERM; | |
541 | ||
542 | if (info->fbops->fb_write) | |
543 | return info->fbops->fb_write(file, buf, count, ppos); | |
544 | ||
545 | total_size = info->screen_size; | |
546 | if (total_size == 0) | |
547 | total_size = info->fix.smem_len; | |
548 | ||
549 | if (p > total_size) | |
550 | return -ENOSPC; | |
551 | if (count >= total_size) | |
552 | count = total_size; | |
553 | err = 0; | |
554 | if (count + p > total_size) { | |
555 | count = total_size - p; | |
556 | err = -ENOSPC; | |
557 | } | |
558 | cnt = 0; | |
559 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, | |
560 | GFP_KERNEL); | |
561 | if (!buffer) | |
562 | return -ENOMEM; | |
563 | ||
564 | dst = (u32 __iomem *) (info->screen_base + p); | |
565 | ||
566 | if (info->fbops->fb_sync) | |
567 | info->fbops->fb_sync(info); | |
568 | ||
569 | while (count) { | |
570 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
571 | src = buffer; | |
572 | if (copy_from_user(src, buf, c)) { | |
573 | err = -EFAULT; | |
574 | break; | |
575 | } | |
576 | for (i = c >> 2; i--; ) | |
577 | fb_writel(*src++, dst++); | |
578 | if (c & 3) { | |
579 | u8 *src8 = (u8 *) src; | |
580 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
581 | ||
582 | for (i = c & 3; i--; ) | |
583 | fb_writeb(*src8++, dst8++); | |
584 | ||
585 | dst = (u32 __iomem *) dst8; | |
586 | } | |
587 | *ppos += c; | |
588 | buf += c; | |
589 | cnt += c; | |
590 | count -= c; | |
591 | } | |
592 | kfree(buffer); | |
593 | ||
594 | return (err) ? err : cnt; | |
595 | } | |
596 | ||
597 | #ifdef CONFIG_KMOD | |
598 | static void try_to_load(int fb) | |
599 | { | |
600 | request_module("fb%d", fb); | |
601 | } | |
602 | #endif /* CONFIG_KMOD */ | |
603 | ||
604 | int | |
605 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
606 | { | |
607 | int xoffset = var->xoffset; | |
608 | int yoffset = var->yoffset; | |
609 | int err; | |
610 | ||
611 | if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display || | |
612 | xoffset + info->var.xres > info->var.xres_virtual || | |
613 | yoffset + info->var.yres > info->var.yres_virtual) | |
614 | return -EINVAL; | |
615 | if ((err = info->fbops->fb_pan_display(var, info))) | |
616 | return err; | |
617 | info->var.xoffset = var->xoffset; | |
618 | info->var.yoffset = var->yoffset; | |
619 | if (var->vmode & FB_VMODE_YWRAP) | |
620 | info->var.vmode |= FB_VMODE_YWRAP; | |
621 | else | |
622 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
623 | return 0; | |
624 | } | |
625 | ||
626 | int | |
627 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
628 | { | |
629 | int err; | |
630 | ||
631 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
632 | struct fb_videomode mode1, mode2; | |
633 | int ret = 0; | |
634 | ||
635 | fb_var_to_videomode(&mode1, var); | |
636 | fb_var_to_videomode(&mode2, &info->var); | |
637 | /* make sure we don't delete the videomode of current var */ | |
638 | ret = fb_mode_is_equal(&mode1, &mode2); | |
639 | ||
640 | if (!ret) { | |
641 | struct fb_event event; | |
642 | ||
643 | event.info = info; | |
644 | event.data = &mode1; | |
645 | ret = notifier_call_chain(&fb_notifier_list, | |
646 | FB_EVENT_MODE_DELETE, &event); | |
647 | } | |
648 | ||
649 | if (!ret) | |
650 | fb_delete_videomode(&mode1, &info->modelist); | |
651 | ||
652 | return ret; | |
653 | } | |
654 | ||
655 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
656 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
657 | if (!info->fbops->fb_check_var) { | |
658 | *var = info->var; | |
659 | return 0; | |
660 | } | |
661 | ||
662 | if ((err = info->fbops->fb_check_var(var, info))) | |
663 | return err; | |
664 | ||
665 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
666 | struct fb_videomode mode; | |
667 | int err = 0; | |
668 | ||
669 | info->var = *var; | |
670 | if (info->fbops->fb_set_par) | |
671 | info->fbops->fb_set_par(info); | |
672 | ||
673 | fb_pan_display(info, &info->var); | |
674 | ||
675 | fb_set_cmap(&info->cmap, info); | |
676 | ||
677 | fb_var_to_videomode(&mode, &info->var); | |
678 | ||
679 | if (info->modelist.prev && info->modelist.next && | |
680 | !list_empty(&info->modelist)) | |
681 | err = fb_add_videomode(&mode, &info->modelist); | |
682 | ||
683 | if (!err && info->flags & FBINFO_MISC_USEREVENT) { | |
684 | struct fb_event event; | |
685 | ||
686 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
687 | event.info = info; | |
688 | notifier_call_chain(&fb_notifier_list, | |
689 | FB_EVENT_MODE_CHANGE, | |
690 | &event); | |
691 | } | |
692 | } | |
693 | } | |
694 | return 0; | |
695 | } | |
696 | ||
697 | int | |
698 | fb_blank(struct fb_info *info, int blank) | |
699 | { | |
700 | int ret = -EINVAL; | |
701 | ||
702 | if (blank > FB_BLANK_POWERDOWN) | |
703 | blank = FB_BLANK_POWERDOWN; | |
704 | ||
705 | if (info->fbops->fb_blank) | |
706 | ret = info->fbops->fb_blank(blank, info); | |
707 | ||
708 | if (!ret) { | |
709 | struct fb_event event; | |
710 | ||
711 | event.info = info; | |
712 | event.data = ␣ | |
713 | notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event); | |
714 | } | |
715 | ||
716 | return ret; | |
717 | } | |
718 | ||
719 | static int | |
720 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
721 | unsigned long arg) | |
722 | { | |
723 | int fbidx = iminor(inode); | |
724 | struct fb_info *info = registered_fb[fbidx]; | |
725 | struct fb_ops *fb = info->fbops; | |
726 | struct fb_var_screeninfo var; | |
727 | struct fb_fix_screeninfo fix; | |
728 | struct fb_con2fbmap con2fb; | |
729 | struct fb_cmap_user cmap; | |
730 | struct fb_event event; | |
731 | void __user *argp = (void __user *)arg; | |
732 | int i; | |
733 | ||
734 | if (!fb) | |
735 | return -ENODEV; | |
736 | switch (cmd) { | |
737 | case FBIOGET_VSCREENINFO: | |
738 | return copy_to_user(argp, &info->var, | |
739 | sizeof(var)) ? -EFAULT : 0; | |
740 | case FBIOPUT_VSCREENINFO: | |
741 | if (copy_from_user(&var, argp, sizeof(var))) | |
742 | return -EFAULT; | |
743 | acquire_console_sem(); | |
744 | info->flags |= FBINFO_MISC_USEREVENT; | |
745 | i = fb_set_var(info, &var); | |
746 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
747 | release_console_sem(); | |
748 | if (i) return i; | |
749 | if (copy_to_user(argp, &var, sizeof(var))) | |
750 | return -EFAULT; | |
751 | return 0; | |
752 | case FBIOGET_FSCREENINFO: | |
753 | return copy_to_user(argp, &info->fix, | |
754 | sizeof(fix)) ? -EFAULT : 0; | |
755 | case FBIOPUTCMAP: | |
756 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
757 | return -EFAULT; | |
758 | return (fb_set_user_cmap(&cmap, info)); | |
759 | case FBIOGETCMAP: | |
760 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
761 | return -EFAULT; | |
762 | return fb_cmap_to_user(&info->cmap, &cmap); | |
763 | case FBIOPAN_DISPLAY: | |
764 | if (copy_from_user(&var, argp, sizeof(var))) | |
765 | return -EFAULT; | |
766 | acquire_console_sem(); | |
767 | i = fb_pan_display(info, &var); | |
768 | release_console_sem(); | |
769 | if (i) | |
770 | return i; | |
771 | if (copy_to_user(argp, &var, sizeof(var))) | |
772 | return -EFAULT; | |
773 | return 0; | |
774 | case FBIO_CURSOR: | |
775 | return -EINVAL; | |
776 | case FBIOGET_CON2FBMAP: | |
777 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
778 | return -EFAULT; | |
779 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
780 | return -EINVAL; | |
781 | con2fb.framebuffer = -1; | |
782 | event.info = info; | |
783 | event.data = &con2fb; | |
784 | notifier_call_chain(&fb_notifier_list, | |
785 | FB_EVENT_GET_CONSOLE_MAP, &event); | |
786 | return copy_to_user(argp, &con2fb, | |
787 | sizeof(con2fb)) ? -EFAULT : 0; | |
788 | case FBIOPUT_CON2FBMAP: | |
789 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
790 | return - EFAULT; | |
791 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
792 | return -EINVAL; | |
793 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
794 | return -EINVAL; | |
795 | #ifdef CONFIG_KMOD | |
796 | if (!registered_fb[con2fb.framebuffer]) | |
797 | try_to_load(con2fb.framebuffer); | |
798 | #endif /* CONFIG_KMOD */ | |
799 | if (!registered_fb[con2fb.framebuffer]) | |
800 | return -EINVAL; | |
801 | event.info = info; | |
802 | event.data = &con2fb; | |
803 | return notifier_call_chain(&fb_notifier_list, | |
804 | FB_EVENT_SET_CONSOLE_MAP, | |
805 | &event); | |
806 | case FBIOBLANK: | |
807 | acquire_console_sem(); | |
808 | info->flags |= FBINFO_MISC_USEREVENT; | |
809 | i = fb_blank(info, arg); | |
810 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
811 | release_console_sem(); | |
812 | return i; | |
813 | default: | |
814 | if (fb->fb_ioctl == NULL) | |
815 | return -EINVAL; | |
816 | return fb->fb_ioctl(inode, file, cmd, arg, info); | |
817 | } | |
818 | } | |
819 | ||
820 | #ifdef CONFIG_COMPAT | |
821 | static long | |
822 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
823 | { | |
824 | int fbidx = iminor(file->f_dentry->d_inode); | |
825 | struct fb_info *info = registered_fb[fbidx]; | |
826 | struct fb_ops *fb = info->fbops; | |
827 | long ret; | |
828 | ||
829 | if (fb->fb_compat_ioctl == NULL) | |
830 | return -ENOIOCTLCMD; | |
831 | lock_kernel(); | |
832 | ret = fb->fb_compat_ioctl(file, cmd, arg, info); | |
833 | unlock_kernel(); | |
834 | return ret; | |
835 | } | |
836 | #endif | |
837 | ||
838 | static int | |
839 | fb_mmap(struct file *file, struct vm_area_struct * vma) | |
840 | { | |
841 | int fbidx = iminor(file->f_dentry->d_inode); | |
842 | struct fb_info *info = registered_fb[fbidx]; | |
843 | struct fb_ops *fb = info->fbops; | |
844 | unsigned long off; | |
845 | #if !defined(__sparc__) || defined(__sparc_v9__) | |
846 | unsigned long start; | |
847 | u32 len; | |
848 | #endif | |
849 | ||
850 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
851 | return -EINVAL; | |
852 | off = vma->vm_pgoff << PAGE_SHIFT; | |
853 | if (!fb) | |
854 | return -ENODEV; | |
855 | if (fb->fb_mmap) { | |
856 | int res; | |
857 | lock_kernel(); | |
858 | res = fb->fb_mmap(info, file, vma); | |
859 | unlock_kernel(); | |
860 | return res; | |
861 | } | |
862 | ||
863 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
864 | /* Should never get here, all fb drivers should have their own | |
865 | mmap routines */ | |
866 | return -EINVAL; | |
867 | #else | |
868 | /* !sparc32... */ | |
869 | lock_kernel(); | |
870 | ||
871 | /* frame buffer memory */ | |
872 | start = info->fix.smem_start; | |
873 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
874 | if (off >= len) { | |
875 | /* memory mapped io */ | |
876 | off -= len; | |
877 | if (info->var.accel_flags) { | |
878 | unlock_kernel(); | |
879 | return -EINVAL; | |
880 | } | |
881 | start = info->fix.mmio_start; | |
882 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
883 | } | |
884 | unlock_kernel(); | |
885 | start &= PAGE_MASK; | |
886 | if ((vma->vm_end - vma->vm_start + off) > len) | |
887 | return -EINVAL; | |
888 | off += start; | |
889 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
890 | /* This is an IO map - tell maydump to skip this VMA */ | |
891 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
892 | #if defined(__sparc_v9__) | |
893 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
894 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
895 | return -EAGAIN; | |
896 | #else | |
897 | #if defined(__mc68000__) | |
898 | #if defined(CONFIG_SUN3) | |
899 | pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; | |
900 | #elif defined(CONFIG_MMU) | |
901 | if (CPU_IS_020_OR_030) | |
902 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; | |
903 | if (CPU_IS_040_OR_060) { | |
904 | pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; | |
905 | /* Use no-cache mode, serialized */ | |
906 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; | |
907 | } | |
908 | #endif | |
909 | #elif defined(__powerpc__) | |
910 | vma->vm_page_prot = phys_mem_access_prot(file, off, | |
911 | vma->vm_end - vma->vm_start, | |
912 | vma->vm_page_prot); | |
913 | #elif defined(__alpha__) | |
914 | /* Caching is off in the I/O space quadrant by design. */ | |
915 | #elif defined(__i386__) || defined(__x86_64__) | |
916 | if (boot_cpu_data.x86 > 3) | |
917 | pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; | |
918 | #elif defined(__mips__) | |
919 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
920 | #elif defined(__hppa__) | |
921 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
922 | #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) | |
923 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
924 | #elif defined(__ia64__) | |
925 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) | |
926 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
927 | else | |
928 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
929 | #else | |
930 | #warning What do we have to do here?? | |
931 | #endif | |
932 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
933 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
934 | return -EAGAIN; | |
935 | #endif /* !__sparc_v9__ */ | |
936 | return 0; | |
937 | #endif /* !sparc32 */ | |
938 | } | |
939 | ||
940 | static int | |
941 | fb_open(struct inode *inode, struct file *file) | |
942 | { | |
943 | int fbidx = iminor(inode); | |
944 | struct fb_info *info; | |
945 | int res = 0; | |
946 | ||
947 | if (fbidx >= FB_MAX) | |
948 | return -ENODEV; | |
949 | #ifdef CONFIG_KMOD | |
950 | if (!(info = registered_fb[fbidx])) | |
951 | try_to_load(fbidx); | |
952 | #endif /* CONFIG_KMOD */ | |
953 | if (!(info = registered_fb[fbidx])) | |
954 | return -ENODEV; | |
955 | if (!try_module_get(info->fbops->owner)) | |
956 | return -ENODEV; | |
957 | if (info->fbops->fb_open) { | |
958 | res = info->fbops->fb_open(info,1); | |
959 | if (res) | |
960 | module_put(info->fbops->owner); | |
961 | } | |
962 | return res; | |
963 | } | |
964 | ||
965 | static int | |
966 | fb_release(struct inode *inode, struct file *file) | |
967 | { | |
968 | int fbidx = iminor(inode); | |
969 | struct fb_info *info; | |
970 | ||
971 | lock_kernel(); | |
972 | info = registered_fb[fbidx]; | |
973 | if (info->fbops->fb_release) | |
974 | info->fbops->fb_release(info,1); | |
975 | module_put(info->fbops->owner); | |
976 | unlock_kernel(); | |
977 | return 0; | |
978 | } | |
979 | ||
980 | static struct file_operations fb_fops = { | |
981 | .owner = THIS_MODULE, | |
982 | .read = fb_read, | |
983 | .write = fb_write, | |
984 | .ioctl = fb_ioctl, | |
985 | #ifdef CONFIG_COMPAT | |
986 | .compat_ioctl = fb_compat_ioctl, | |
987 | #endif | |
988 | .mmap = fb_mmap, | |
989 | .open = fb_open, | |
990 | .release = fb_release, | |
991 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
992 | .get_unmapped_area = get_fb_unmapped_area, | |
993 | #endif | |
994 | }; | |
995 | ||
56b22935 | 996 | static struct class *fb_class; |
1da177e4 LT |
997 | |
998 | /** | |
999 | * register_framebuffer - registers a frame buffer device | |
1000 | * @fb_info: frame buffer info structure | |
1001 | * | |
1002 | * Registers a frame buffer device @fb_info. | |
1003 | * | |
1004 | * Returns negative errno on error, or zero for success. | |
1005 | * | |
1006 | */ | |
1007 | ||
1008 | int | |
1009 | register_framebuffer(struct fb_info *fb_info) | |
1010 | { | |
1011 | int i; | |
1012 | struct fb_event event; | |
1013 | ||
1014 | if (num_registered_fb == FB_MAX) | |
1015 | return -ENXIO; | |
1016 | num_registered_fb++; | |
1017 | for (i = 0 ; i < FB_MAX; i++) | |
1018 | if (!registered_fb[i]) | |
1019 | break; | |
1020 | fb_info->node = i; | |
1021 | ||
56b22935 | 1022 | fb_info->class_device = class_device_create(fb_class, MKDEV(FB_MAJOR, i), |
1da177e4 LT |
1023 | fb_info->device, "fb%d", i); |
1024 | if (IS_ERR(fb_info->class_device)) { | |
1025 | /* Not fatal */ | |
1026 | printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device)); | |
1027 | fb_info->class_device = NULL; | |
1028 | } else | |
1029 | fb_init_class_device(fb_info); | |
1030 | ||
1031 | if (fb_info->pixmap.addr == NULL) { | |
1032 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1033 | if (fb_info->pixmap.addr) { | |
1034 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1035 | fb_info->pixmap.buf_align = 1; | |
1036 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1037 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1038 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1039 | } | |
1040 | } | |
1041 | fb_info->pixmap.offset = 0; | |
1042 | ||
1043 | if (!fb_info->modelist.prev || | |
1044 | !fb_info->modelist.next || | |
1045 | list_empty(&fb_info->modelist)) { | |
1046 | struct fb_videomode mode; | |
1047 | ||
1048 | INIT_LIST_HEAD(&fb_info->modelist); | |
1049 | fb_var_to_videomode(&mode, &fb_info->var); | |
1050 | fb_add_videomode(&mode, &fb_info->modelist); | |
1051 | } | |
1052 | ||
1053 | registered_fb[i] = fb_info; | |
1054 | ||
1055 | devfs_mk_cdev(MKDEV(FB_MAJOR, i), | |
1056 | S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); | |
1057 | event.info = fb_info; | |
1058 | notifier_call_chain(&fb_notifier_list, | |
1059 | FB_EVENT_FB_REGISTERED, &event); | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | ||
1064 | /** | |
1065 | * unregister_framebuffer - releases a frame buffer device | |
1066 | * @fb_info: frame buffer info structure | |
1067 | * | |
1068 | * Unregisters a frame buffer device @fb_info. | |
1069 | * | |
1070 | * Returns negative errno on error, or zero for success. | |
1071 | * | |
1072 | */ | |
1073 | ||
1074 | int | |
1075 | unregister_framebuffer(struct fb_info *fb_info) | |
1076 | { | |
1077 | int i; | |
1078 | ||
1079 | i = fb_info->node; | |
1080 | if (!registered_fb[i]) | |
1081 | return -EINVAL; | |
1082 | devfs_remove("fb/%d", i); | |
1083 | ||
1084 | if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1085 | kfree(fb_info->pixmap.addr); | |
1086 | fb_destroy_modelist(&fb_info->modelist); | |
1087 | registered_fb[i]=NULL; | |
1088 | num_registered_fb--; | |
1089 | fb_cleanup_class_device(fb_info); | |
56b22935 | 1090 | class_device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
1da177e4 LT |
1091 | return 0; |
1092 | } | |
1093 | ||
1094 | /** | |
1095 | * fb_register_client - register a client notifier | |
1096 | * @nb: notifier block to callback on events | |
1097 | */ | |
1098 | int fb_register_client(struct notifier_block *nb) | |
1099 | { | |
1100 | return notifier_chain_register(&fb_notifier_list, nb); | |
1101 | } | |
1102 | ||
1103 | /** | |
1104 | * fb_unregister_client - unregister a client notifier | |
1105 | * @nb: notifier block to callback on events | |
1106 | */ | |
1107 | int fb_unregister_client(struct notifier_block *nb) | |
1108 | { | |
1109 | return notifier_chain_unregister(&fb_notifier_list, nb); | |
1110 | } | |
1111 | ||
1112 | /** | |
1113 | * fb_set_suspend - low level driver signals suspend | |
1114 | * @info: framebuffer affected | |
1115 | * @state: 0 = resuming, !=0 = suspending | |
1116 | * | |
1117 | * This is meant to be used by low level drivers to | |
1118 | * signal suspend/resume to the core & clients. | |
1119 | * It must be called with the console semaphore held | |
1120 | */ | |
1121 | void fb_set_suspend(struct fb_info *info, int state) | |
1122 | { | |
1123 | struct fb_event event; | |
1124 | ||
1125 | event.info = info; | |
1126 | if (state) { | |
1127 | notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event); | |
1128 | info->state = FBINFO_STATE_SUSPENDED; | |
1129 | } else { | |
1130 | info->state = FBINFO_STATE_RUNNING; | |
1131 | notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event); | |
1132 | } | |
1133 | } | |
1134 | ||
1135 | /** | |
1136 | * fbmem_init - init frame buffer subsystem | |
1137 | * | |
1138 | * Initialize the frame buffer subsystem. | |
1139 | * | |
1140 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1141 | * | |
1142 | */ | |
1143 | ||
1144 | static int __init | |
1145 | fbmem_init(void) | |
1146 | { | |
1147 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1148 | ||
1149 | devfs_mk_dir("fb"); | |
1150 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) | |
1151 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1152 | ||
56b22935 | 1153 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1154 | if (IS_ERR(fb_class)) { |
1155 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1156 | fb_class = NULL; | |
1157 | } | |
1158 | return 0; | |
1159 | } | |
1160 | ||
1161 | #ifdef MODULE | |
1162 | module_init(fbmem_init); | |
1163 | static void __exit | |
1164 | fbmem_exit(void) | |
1165 | { | |
56b22935 | 1166 | class_destroy(fb_class); |
1da177e4 LT |
1167 | } |
1168 | ||
1169 | module_exit(fbmem_exit); | |
1170 | MODULE_LICENSE("GPL"); | |
1171 | MODULE_DESCRIPTION("Framebuffer base"); | |
1172 | #else | |
1173 | subsys_initcall(fbmem_init); | |
1174 | #endif | |
1175 | ||
1176 | int fb_new_modelist(struct fb_info *info) | |
1177 | { | |
1178 | struct fb_event event; | |
1179 | struct fb_var_screeninfo var = info->var; | |
1180 | struct list_head *pos, *n; | |
1181 | struct fb_modelist *modelist; | |
1182 | struct fb_videomode *m, mode; | |
1183 | int err = 1; | |
1184 | ||
1185 | list_for_each_safe(pos, n, &info->modelist) { | |
1186 | modelist = list_entry(pos, struct fb_modelist, list); | |
1187 | m = &modelist->mode; | |
1188 | fb_videomode_to_var(&var, m); | |
1189 | var.activate = FB_ACTIVATE_TEST; | |
1190 | err = fb_set_var(info, &var); | |
1191 | fb_var_to_videomode(&mode, &var); | |
1192 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1193 | list_del(pos); | |
1194 | kfree(pos); | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | err = 1; | |
1199 | ||
1200 | if (!list_empty(&info->modelist)) { | |
1201 | event.info = info; | |
1202 | err = notifier_call_chain(&fb_notifier_list, | |
1203 | FB_EVENT_NEW_MODELIST, | |
1204 | &event); | |
1205 | } | |
1206 | ||
1207 | return err; | |
1208 | } | |
1209 | ||
1210 | static char *video_options[FB_MAX]; | |
1211 | static int ofonly; | |
1212 | ||
4dc3b16b PP |
1213 | extern const char *global_mode_option; |
1214 | ||
1da177e4 LT |
1215 | /** |
1216 | * fb_get_options - get kernel boot parameters | |
1217 | * @name: framebuffer name as it would appear in | |
1218 | * the boot parameter line | |
1219 | * (video=<name>:<options>) | |
1220 | * @option: the option will be stored here | |
1221 | * | |
1222 | * NOTE: Needed to maintain backwards compatibility | |
1223 | */ | |
1224 | int fb_get_options(char *name, char **option) | |
1225 | { | |
1226 | char *opt, *options = NULL; | |
1227 | int opt_len, retval = 0; | |
1228 | int name_len = strlen(name), i; | |
1229 | ||
1230 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1231 | retval = 1; | |
1232 | ||
1233 | if (name_len && !retval) { | |
1234 | for (i = 0; i < FB_MAX; i++) { | |
1235 | if (video_options[i] == NULL) | |
1236 | continue; | |
1237 | opt_len = strlen(video_options[i]); | |
1238 | if (!opt_len) | |
1239 | continue; | |
1240 | opt = video_options[i]; | |
1241 | if (!strncmp(name, opt, name_len) && | |
1242 | opt[name_len] == ':') | |
1243 | options = opt + name_len + 1; | |
1244 | } | |
1245 | } | |
1246 | if (options && !strncmp(options, "off", 3)) | |
1247 | retval = 1; | |
1248 | ||
1249 | if (option) | |
1250 | *option = options; | |
1251 | ||
1252 | return retval; | |
1253 | } | |
1254 | ||
1da177e4 LT |
1255 | /** |
1256 | * video_setup - process command line options | |
1257 | * @options: string of options | |
1258 | * | |
1259 | * Process command line options for frame buffer subsystem. | |
1260 | * | |
1261 | * NOTE: This function is a __setup and __init function. | |
1262 | * It only stores the options. Drivers have to call | |
1263 | * fb_get_options() as necessary. | |
1264 | * | |
1265 | * Returns zero. | |
1266 | * | |
1267 | */ | |
75c96f85 | 1268 | static int __init video_setup(char *options) |
1da177e4 LT |
1269 | { |
1270 | int i, global = 0; | |
1271 | ||
1272 | if (!options || !*options) | |
1273 | global = 1; | |
1274 | ||
1275 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1276 | ofonly = 1; | |
1277 | global = 1; | |
1278 | } | |
1279 | ||
1280 | if (!global && !strstr(options, "fb:")) { | |
1281 | global_mode_option = options; | |
1282 | global = 1; | |
1283 | } | |
1284 | ||
1285 | if (!global) { | |
1286 | for (i = 0; i < FB_MAX; i++) { | |
1287 | if (video_options[i] == NULL) { | |
1288 | video_options[i] = options; | |
1289 | break; | |
1290 | } | |
1291 | ||
1292 | } | |
1293 | } | |
1294 | ||
1295 | return 0; | |
1296 | } | |
1297 | __setup("video=", video_setup); | |
1298 | ||
1299 | /* | |
1300 | * Visible symbols for modules | |
1301 | */ | |
1302 | ||
1303 | EXPORT_SYMBOL(register_framebuffer); | |
1304 | EXPORT_SYMBOL(unregister_framebuffer); | |
1305 | EXPORT_SYMBOL(num_registered_fb); | |
1306 | EXPORT_SYMBOL(registered_fb); | |
1307 | EXPORT_SYMBOL(fb_prepare_logo); | |
1308 | EXPORT_SYMBOL(fb_show_logo); | |
1309 | EXPORT_SYMBOL(fb_set_var); | |
1310 | EXPORT_SYMBOL(fb_blank); | |
1311 | EXPORT_SYMBOL(fb_pan_display); | |
1312 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 LT |
1313 | EXPORT_SYMBOL(fb_set_suspend); |
1314 | EXPORT_SYMBOL(fb_register_client); | |
1315 | EXPORT_SYMBOL(fb_unregister_client); | |
1316 | EXPORT_SYMBOL(fb_get_options); | |
1317 | EXPORT_SYMBOL(fb_new_modelist); | |
1318 | ||
1319 | MODULE_LICENSE("GPL"); |