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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 | ||
b8c90945 AD |
65 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
66 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 67 | { |
b8c90945 AD |
68 | int depth = 0; |
69 | ||
70 | if (fix->visual == FB_VISUAL_MONO01 || | |
71 | fix->visual == FB_VISUAL_MONO10) | |
72 | depth = 1; | |
73 | else { | |
74 | if (var->green.length == var->blue.length && | |
75 | var->green.length == var->red.length && | |
76 | var->green.offset == var->blue.offset && | |
77 | var->green.offset == var->red.offset) | |
78 | depth = var->green.length; | |
79 | else | |
80 | depth = var->green.length + var->red.length + | |
81 | var->blue.length; | |
82 | } | |
83 | ||
84 | return depth; | |
1da177e4 LT |
85 | } |
86 | EXPORT_SYMBOL(fb_get_color_depth); | |
87 | ||
88 | /* | |
f5a9951c | 89 | * Data padding functions. |
1da177e4 | 90 | */ |
f1ab5dac | 91 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 92 | { |
829e79b6 | 93 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 94 | } |
f1ab5dac | 95 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 96 | |
f1ab5dac JS |
97 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
98 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
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 | } | |
f1ab5dac | 125 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
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 | { | |
b8c90945 | 254 | int i, j, k; |
1da177e4 | 255 | const u8 *src = logo->data; |
b8c90945 AD |
256 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
257 | u8 fg = 1, d; | |
1da177e4 | 258 | |
b8c90945 | 259 | if (fb_get_color_depth(&info->var, &info->fix) == 3) |
1da177e4 LT |
260 | fg = 7; |
261 | ||
b8c90945 AD |
262 | if (info->fix.visual == FB_VISUAL_MONO01 || |
263 | info->fix.visual == FB_VISUAL_MONO10) | |
264 | fg = ~((u8) (0xfff << info->var.green.length)); | |
265 | ||
1da177e4 LT |
266 | switch (depth) { |
267 | case 4: | |
268 | for (i = 0; i < logo->height; i++) | |
269 | for (j = 0; j < logo->width; src++) { | |
270 | *dst++ = *src >> 4; | |
271 | j++; | |
272 | if (j < logo->width) { | |
273 | *dst++ = *src & 0x0f; | |
274 | j++; | |
275 | } | |
276 | } | |
277 | break; | |
278 | case 1: | |
279 | for (i = 0; i < logo->height; i++) { | |
280 | for (j = 0; j < logo->width; src++) { | |
281 | d = *src ^ xor; | |
282 | for (k = 7; k >= 0; k--) { | |
283 | *dst++ = ((d >> k) & 1) ? fg : 0; | |
284 | j++; | |
285 | } | |
286 | } | |
287 | } | |
288 | break; | |
289 | } | |
290 | } | |
291 | ||
292 | /* | |
293 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
294 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
295 | * the visual format and color depth of the framebuffer, the DAC, the | |
296 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
297 | * | |
298 | * Case 1 - linux_logo_clut224: | |
299 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
300 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
301 | * | |
302 | * For visuals that require color info from the pseudo_palette, we also construct | |
303 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
304 | * will be set. | |
305 | * | |
306 | * Case 2 - linux_logo_vga16: | |
307 | * The number of colors just matches the console colors, thus there is no need | |
308 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
309 | * each byte contains color information for two pixels (upper and lower nibble). | |
310 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
311 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
312 | * | |
313 | * Case 3 - linux_logo_mono: | |
314 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
315 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
316 | * be set to 1. | |
317 | */ | |
318 | static struct logo_data { | |
319 | int depth; | |
320 | int needs_directpalette; | |
321 | int needs_truepalette; | |
322 | int needs_cmapreset; | |
323 | const struct linux_logo *logo; | |
324 | } fb_logo; | |
325 | ||
9c44e5f6 AD |
326 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
327 | { | |
328 | u32 size = width * height, i; | |
329 | ||
330 | out += size - 1; | |
331 | ||
332 | for (i = size; i--; ) | |
333 | *out-- = *in++; | |
334 | } | |
335 | ||
336 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
337 | { | |
338 | int i, j, w = width - 1; | |
339 | ||
340 | for (i = 0; i < height; i++) | |
341 | for (j = 0; j < width; j++) | |
342 | out[height * j + w - i] = *in++; | |
343 | } | |
344 | ||
345 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
346 | { | |
347 | int i, j, w = width - 1; | |
348 | ||
349 | for (i = 0; i < height; i++) | |
350 | for (j = 0; j < width; j++) | |
351 | out[height * (w - j) + i] = *in++; | |
352 | } | |
353 | ||
354 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
355 | struct fb_image *image, int rotate) | |
356 | { | |
357 | u32 tmp; | |
358 | ||
359 | if (rotate == FB_ROTATE_UD) { | |
360 | image->dx = info->var.xres - image->width; | |
361 | image->dy = info->var.yres - image->height; | |
362 | fb_rotate_logo_ud(image->data, dst, image->width, | |
363 | image->height); | |
364 | } else if (rotate == FB_ROTATE_CW) { | |
365 | tmp = image->width; | |
366 | image->width = image->height; | |
367 | image->height = tmp; | |
368 | image->dx = info->var.xres - image->height; | |
369 | fb_rotate_logo_cw(image->data, dst, image->width, | |
370 | image->height); | |
371 | } else if (rotate == FB_ROTATE_CCW) { | |
372 | tmp = image->width; | |
373 | image->width = image->height; | |
374 | image->height = tmp; | |
375 | image->dy = info->var.yres - image->width; | |
376 | fb_rotate_logo_ccw(image->data, dst, image->width, | |
377 | image->height); | |
378 | } | |
379 | ||
380 | image->data = dst; | |
381 | } | |
382 | ||
383 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
384 | int rotate) | |
385 | { | |
386 | int x; | |
387 | ||
388 | if (rotate == FB_ROTATE_UR) { | |
389 | for (x = 0; x < num_online_cpus() && | |
390 | x * (fb_logo.logo->width + 8) <= | |
391 | info->var.xres - fb_logo.logo->width; x++) { | |
392 | info->fbops->fb_imageblit(info, image); | |
393 | image->dx += fb_logo.logo->width + 8; | |
394 | } | |
395 | } else if (rotate == FB_ROTATE_UD) { | |
396 | for (x = 0; x < num_online_cpus() && | |
397 | x * (fb_logo.logo->width + 8) <= | |
398 | info->var.xres - fb_logo.logo->width; x++) { | |
399 | info->fbops->fb_imageblit(info, image); | |
400 | image->dx -= fb_logo.logo->width + 8; | |
401 | } | |
402 | } else if (rotate == FB_ROTATE_CW) { | |
403 | for (x = 0; x < num_online_cpus() && | |
404 | x * (fb_logo.logo->width + 8) <= | |
405 | info->var.yres - fb_logo.logo->width; x++) { | |
406 | info->fbops->fb_imageblit(info, image); | |
407 | image->dy += fb_logo.logo->width + 8; | |
408 | } | |
409 | } else if (rotate == FB_ROTATE_CCW) { | |
410 | for (x = 0; x < num_online_cpus() && | |
411 | x * (fb_logo.logo->width + 8) <= | |
412 | info->var.yres - fb_logo.logo->width; x++) { | |
413 | info->fbops->fb_imageblit(info, image); | |
414 | image->dy -= fb_logo.logo->width + 8; | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
419 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
1da177e4 | 420 | { |
b8c90945 | 421 | int depth = fb_get_color_depth(&info->var, &info->fix); |
9c44e5f6 | 422 | int yres; |
1da177e4 LT |
423 | |
424 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
425 | ||
426 | if (info->flags & FBINFO_MISC_TILEBLITTING) | |
427 | return 0; | |
428 | ||
429 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
430 | depth = info->var.blue.length; | |
431 | if (info->var.red.length < depth) | |
432 | depth = info->var.red.length; | |
433 | if (info->var.green.length < depth) | |
434 | depth = info->var.green.length; | |
435 | } | |
436 | ||
437 | if (depth >= 8) { | |
438 | switch (info->fix.visual) { | |
439 | case FB_VISUAL_TRUECOLOR: | |
440 | fb_logo.needs_truepalette = 1; | |
441 | break; | |
442 | case FB_VISUAL_DIRECTCOLOR: | |
443 | fb_logo.needs_directpalette = 1; | |
444 | fb_logo.needs_cmapreset = 1; | |
445 | break; | |
446 | case FB_VISUAL_PSEUDOCOLOR: | |
447 | fb_logo.needs_cmapreset = 1; | |
448 | break; | |
449 | } | |
450 | } | |
451 | ||
452 | /* Return if no suitable logo was found */ | |
453 | fb_logo.logo = fb_find_logo(depth); | |
454 | ||
9c44e5f6 AD |
455 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
456 | yres = info->var.yres; | |
457 | else | |
458 | yres = info->var.xres; | |
459 | ||
460 | if (fb_logo.logo && fb_logo.logo->height > yres) { | |
1da177e4 LT |
461 | fb_logo.logo = NULL; |
462 | return 0; | |
463 | } | |
9c44e5f6 | 464 | |
1da177e4 LT |
465 | /* What depth we asked for might be different from what we get */ |
466 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
467 | fb_logo.depth = 8; | |
468 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
469 | fb_logo.depth = 4; | |
470 | else | |
471 | fb_logo.depth = 1; | |
472 | return fb_logo.logo->height; | |
473 | } | |
474 | ||
9c44e5f6 | 475 | int fb_show_logo(struct fb_info *info, int rotate) |
1da177e4 LT |
476 | { |
477 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 478 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 479 | struct fb_image image; |
1da177e4 LT |
480 | |
481 | /* Return if the frame buffer is not mapped or suspended */ | |
482 | if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING) | |
483 | return 0; | |
484 | ||
485 | image.depth = 8; | |
486 | image.data = fb_logo.logo->data; | |
487 | ||
488 | if (fb_logo.needs_cmapreset) | |
489 | fb_set_logocmap(info, fb_logo.logo); | |
490 | ||
491 | if (fb_logo.needs_truepalette || | |
492 | fb_logo.needs_directpalette) { | |
493 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
494 | if (palette == NULL) | |
495 | return 0; | |
496 | ||
497 | if (fb_logo.needs_truepalette) | |
498 | fb_set_logo_truepalette(info, fb_logo.logo, palette); | |
499 | else | |
500 | fb_set_logo_directpalette(info, fb_logo.logo, palette); | |
501 | ||
502 | saved_pseudo_palette = info->pseudo_palette; | |
503 | info->pseudo_palette = palette; | |
504 | } | |
505 | ||
506 | if (fb_logo.depth <= 4) { | |
507 | logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height, | |
508 | GFP_KERNEL); | |
509 | if (logo_new == NULL) { | |
510 | kfree(palette); | |
511 | if (saved_pseudo_palette) | |
512 | info->pseudo_palette = saved_pseudo_palette; | |
513 | return 0; | |
514 | } | |
515 | image.data = logo_new; | |
516 | fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth); | |
517 | } | |
518 | ||
9c44e5f6 AD |
519 | image.dx = 0; |
520 | image.dy = 0; | |
1da177e4 LT |
521 | image.width = fb_logo.logo->width; |
522 | image.height = fb_logo.logo->height; | |
1da177e4 | 523 | |
9c44e5f6 AD |
524 | if (rotate) { |
525 | logo_rotate = kmalloc(fb_logo.logo->width * | |
526 | fb_logo.logo->height, GFP_KERNEL); | |
527 | if (logo_rotate) | |
528 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 529 | } |
9c44e5f6 AD |
530 | |
531 | fb_do_show_logo(info, &image, rotate); | |
532 | ||
1da177e4 LT |
533 | kfree(palette); |
534 | if (saved_pseudo_palette != NULL) | |
535 | info->pseudo_palette = saved_pseudo_palette; | |
536 | kfree(logo_new); | |
9c44e5f6 | 537 | kfree(logo_rotate); |
1da177e4 LT |
538 | return fb_logo.logo->height; |
539 | } | |
540 | #else | |
9c44e5f6 AD |
541 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
542 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 LT |
543 | #endif /* CONFIG_LOGO */ |
544 | ||
545 | static int fbmem_read_proc(char *buf, char **start, off_t offset, | |
546 | int len, int *eof, void *private) | |
547 | { | |
548 | struct fb_info **fi; | |
549 | int clen; | |
550 | ||
551 | clen = 0; | |
552 | for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++) | |
553 | if (*fi) | |
554 | clen += sprintf(buf + clen, "%d %s\n", | |
555 | (*fi)->node, | |
556 | (*fi)->fix.id); | |
557 | *start = buf + offset; | |
558 | if (clen > offset) | |
559 | clen -= offset; | |
560 | else | |
561 | clen = 0; | |
562 | return clen < len ? clen : len; | |
563 | } | |
564 | ||
565 | static ssize_t | |
566 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
567 | { | |
568 | unsigned long p = *ppos; | |
569 | struct inode *inode = file->f_dentry->d_inode; | |
570 | int fbidx = iminor(inode); | |
571 | struct fb_info *info = registered_fb[fbidx]; | |
572 | u32 *buffer, *dst; | |
573 | u32 __iomem *src; | |
574 | int c, i, cnt = 0, err = 0; | |
575 | unsigned long total_size; | |
576 | ||
577 | if (!info || ! info->screen_base) | |
578 | return -ENODEV; | |
579 | ||
580 | if (info->state != FBINFO_STATE_RUNNING) | |
581 | return -EPERM; | |
582 | ||
583 | if (info->fbops->fb_read) | |
584 | return info->fbops->fb_read(file, buf, count, ppos); | |
585 | ||
586 | total_size = info->screen_size; | |
587 | if (total_size == 0) | |
588 | total_size = info->fix.smem_len; | |
589 | ||
590 | if (p >= total_size) | |
591 | return 0; | |
592 | if (count >= total_size) | |
593 | count = total_size; | |
594 | if (count + p > total_size) | |
595 | count = total_size - p; | |
596 | ||
597 | cnt = 0; | |
598 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, | |
599 | GFP_KERNEL); | |
600 | if (!buffer) | |
601 | return -ENOMEM; | |
602 | ||
603 | src = (u32 __iomem *) (info->screen_base + p); | |
604 | ||
605 | if (info->fbops->fb_sync) | |
606 | info->fbops->fb_sync(info); | |
607 | ||
608 | while (count) { | |
609 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
610 | dst = buffer; | |
611 | for (i = c >> 2; i--; ) | |
612 | *dst++ = fb_readl(src++); | |
613 | if (c & 3) { | |
614 | u8 *dst8 = (u8 *) dst; | |
615 | u8 __iomem *src8 = (u8 __iomem *) src; | |
616 | ||
617 | for (i = c & 3; i--;) | |
618 | *dst8++ = fb_readb(src8++); | |
619 | ||
620 | src = (u32 __iomem *) src8; | |
621 | } | |
622 | ||
623 | if (copy_to_user(buf, buffer, c)) { | |
624 | err = -EFAULT; | |
625 | break; | |
626 | } | |
627 | *ppos += c; | |
628 | buf += c; | |
629 | cnt += c; | |
630 | count -= c; | |
631 | } | |
632 | ||
633 | kfree(buffer); | |
634 | return (err) ? err : cnt; | |
635 | } | |
636 | ||
637 | static ssize_t | |
638 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
639 | { | |
640 | unsigned long p = *ppos; | |
641 | struct inode *inode = file->f_dentry->d_inode; | |
642 | int fbidx = iminor(inode); | |
643 | struct fb_info *info = registered_fb[fbidx]; | |
644 | u32 *buffer, *src; | |
645 | u32 __iomem *dst; | |
646 | int c, i, cnt = 0, err; | |
647 | unsigned long total_size; | |
648 | ||
649 | if (!info || !info->screen_base) | |
650 | return -ENODEV; | |
651 | ||
652 | if (info->state != FBINFO_STATE_RUNNING) | |
653 | return -EPERM; | |
654 | ||
655 | if (info->fbops->fb_write) | |
656 | return info->fbops->fb_write(file, buf, count, ppos); | |
657 | ||
658 | total_size = info->screen_size; | |
659 | if (total_size == 0) | |
660 | total_size = info->fix.smem_len; | |
661 | ||
662 | if (p > total_size) | |
663 | return -ENOSPC; | |
664 | if (count >= total_size) | |
665 | count = total_size; | |
666 | err = 0; | |
667 | if (count + p > total_size) { | |
668 | count = total_size - p; | |
669 | err = -ENOSPC; | |
670 | } | |
671 | cnt = 0; | |
672 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, | |
673 | GFP_KERNEL); | |
674 | if (!buffer) | |
675 | return -ENOMEM; | |
676 | ||
677 | dst = (u32 __iomem *) (info->screen_base + p); | |
678 | ||
679 | if (info->fbops->fb_sync) | |
680 | info->fbops->fb_sync(info); | |
681 | ||
682 | while (count) { | |
683 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
684 | src = buffer; | |
685 | if (copy_from_user(src, buf, c)) { | |
686 | err = -EFAULT; | |
687 | break; | |
688 | } | |
689 | for (i = c >> 2; i--; ) | |
690 | fb_writel(*src++, dst++); | |
691 | if (c & 3) { | |
692 | u8 *src8 = (u8 *) src; | |
693 | u8 __iomem *dst8 = (u8 __iomem *) dst; | |
694 | ||
695 | for (i = c & 3; i--; ) | |
696 | fb_writeb(*src8++, dst8++); | |
697 | ||
698 | dst = (u32 __iomem *) dst8; | |
699 | } | |
700 | *ppos += c; | |
701 | buf += c; | |
702 | cnt += c; | |
703 | count -= c; | |
704 | } | |
705 | kfree(buffer); | |
706 | ||
707 | return (err) ? err : cnt; | |
708 | } | |
709 | ||
710 | #ifdef CONFIG_KMOD | |
711 | static void try_to_load(int fb) | |
712 | { | |
713 | request_module("fb%d", fb); | |
714 | } | |
715 | #endif /* CONFIG_KMOD */ | |
716 | ||
717 | int | |
718 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
719 | { | |
720 | int xoffset = var->xoffset; | |
721 | int yoffset = var->yoffset; | |
722 | int err; | |
723 | ||
724 | if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display || | |
725 | xoffset + info->var.xres > info->var.xres_virtual || | |
726 | yoffset + info->var.yres > info->var.yres_virtual) | |
727 | return -EINVAL; | |
728 | if ((err = info->fbops->fb_pan_display(var, info))) | |
729 | return err; | |
730 | info->var.xoffset = var->xoffset; | |
731 | info->var.yoffset = var->yoffset; | |
732 | if (var->vmode & FB_VMODE_YWRAP) | |
733 | info->var.vmode |= FB_VMODE_YWRAP; | |
734 | else | |
735 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
736 | return 0; | |
737 | } | |
738 | ||
739 | int | |
740 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
741 | { | |
3edea483 | 742 | int err, flags = info->flags; |
1da177e4 LT |
743 | |
744 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
745 | struct fb_videomode mode1, mode2; | |
746 | int ret = 0; | |
747 | ||
748 | fb_var_to_videomode(&mode1, var); | |
749 | fb_var_to_videomode(&mode2, &info->var); | |
750 | /* make sure we don't delete the videomode of current var */ | |
751 | ret = fb_mode_is_equal(&mode1, &mode2); | |
752 | ||
753 | if (!ret) { | |
754 | struct fb_event event; | |
755 | ||
756 | event.info = info; | |
757 | event.data = &mode1; | |
758 | ret = notifier_call_chain(&fb_notifier_list, | |
759 | FB_EVENT_MODE_DELETE, &event); | |
760 | } | |
761 | ||
762 | if (!ret) | |
763 | fb_delete_videomode(&mode1, &info->modelist); | |
764 | ||
765 | return ret; | |
766 | } | |
767 | ||
768 | if ((var->activate & FB_ACTIVATE_FORCE) || | |
769 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { | |
770 | if (!info->fbops->fb_check_var) { | |
771 | *var = info->var; | |
772 | return 0; | |
773 | } | |
774 | ||
775 | if ((err = info->fbops->fb_check_var(var, info))) | |
776 | return err; | |
777 | ||
778 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { | |
779 | struct fb_videomode mode; | |
780 | int err = 0; | |
781 | ||
782 | info->var = *var; | |
783 | if (info->fbops->fb_set_par) | |
784 | info->fbops->fb_set_par(info); | |
785 | ||
786 | fb_pan_display(info, &info->var); | |
787 | ||
788 | fb_set_cmap(&info->cmap, info); | |
789 | ||
790 | fb_var_to_videomode(&mode, &info->var); | |
791 | ||
792 | if (info->modelist.prev && info->modelist.next && | |
793 | !list_empty(&info->modelist)) | |
794 | err = fb_add_videomode(&mode, &info->modelist); | |
795 | ||
3edea483 | 796 | if (!err && (flags & FBINFO_MISC_USEREVENT)) { |
1da177e4 | 797 | struct fb_event event; |
7726e9e1 AD |
798 | int evnt = (var->activate & FB_ACTIVATE_ALL) ? |
799 | FB_EVENT_MODE_CHANGE_ALL : | |
800 | FB_EVENT_MODE_CHANGE; | |
1da177e4 LT |
801 | |
802 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
803 | event.info = info; | |
7726e9e1 | 804 | notifier_call_chain(&fb_notifier_list, evnt, |
1da177e4 LT |
805 | &event); |
806 | } | |
807 | } | |
808 | } | |
809 | return 0; | |
810 | } | |
811 | ||
812 | int | |
813 | fb_blank(struct fb_info *info, int blank) | |
814 | { | |
815 | int ret = -EINVAL; | |
816 | ||
817 | if (blank > FB_BLANK_POWERDOWN) | |
818 | blank = FB_BLANK_POWERDOWN; | |
819 | ||
820 | if (info->fbops->fb_blank) | |
821 | ret = info->fbops->fb_blank(blank, info); | |
822 | ||
823 | if (!ret) { | |
824 | struct fb_event event; | |
825 | ||
826 | event.info = info; | |
827 | event.data = ␣ | |
828 | notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event); | |
829 | } | |
830 | ||
831 | return ret; | |
832 | } | |
833 | ||
834 | static int | |
835 | fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, | |
836 | unsigned long arg) | |
837 | { | |
838 | int fbidx = iminor(inode); | |
839 | struct fb_info *info = registered_fb[fbidx]; | |
840 | struct fb_ops *fb = info->fbops; | |
841 | struct fb_var_screeninfo var; | |
842 | struct fb_fix_screeninfo fix; | |
843 | struct fb_con2fbmap con2fb; | |
844 | struct fb_cmap_user cmap; | |
845 | struct fb_event event; | |
846 | void __user *argp = (void __user *)arg; | |
847 | int i; | |
848 | ||
849 | if (!fb) | |
850 | return -ENODEV; | |
851 | switch (cmd) { | |
852 | case FBIOGET_VSCREENINFO: | |
853 | return copy_to_user(argp, &info->var, | |
854 | sizeof(var)) ? -EFAULT : 0; | |
855 | case FBIOPUT_VSCREENINFO: | |
856 | if (copy_from_user(&var, argp, sizeof(var))) | |
857 | return -EFAULT; | |
858 | acquire_console_sem(); | |
859 | info->flags |= FBINFO_MISC_USEREVENT; | |
860 | i = fb_set_var(info, &var); | |
861 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
862 | release_console_sem(); | |
863 | if (i) return i; | |
864 | if (copy_to_user(argp, &var, sizeof(var))) | |
865 | return -EFAULT; | |
866 | return 0; | |
867 | case FBIOGET_FSCREENINFO: | |
868 | return copy_to_user(argp, &info->fix, | |
869 | sizeof(fix)) ? -EFAULT : 0; | |
870 | case FBIOPUTCMAP: | |
871 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
872 | return -EFAULT; | |
873 | return (fb_set_user_cmap(&cmap, info)); | |
874 | case FBIOGETCMAP: | |
875 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
876 | return -EFAULT; | |
877 | return fb_cmap_to_user(&info->cmap, &cmap); | |
878 | case FBIOPAN_DISPLAY: | |
879 | if (copy_from_user(&var, argp, sizeof(var))) | |
880 | return -EFAULT; | |
881 | acquire_console_sem(); | |
882 | i = fb_pan_display(info, &var); | |
883 | release_console_sem(); | |
884 | if (i) | |
885 | return i; | |
886 | if (copy_to_user(argp, &var, sizeof(var))) | |
887 | return -EFAULT; | |
888 | return 0; | |
889 | case FBIO_CURSOR: | |
890 | return -EINVAL; | |
891 | case FBIOGET_CON2FBMAP: | |
892 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
893 | return -EFAULT; | |
894 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) | |
895 | return -EINVAL; | |
896 | con2fb.framebuffer = -1; | |
897 | event.info = info; | |
898 | event.data = &con2fb; | |
899 | notifier_call_chain(&fb_notifier_list, | |
900 | FB_EVENT_GET_CONSOLE_MAP, &event); | |
901 | return copy_to_user(argp, &con2fb, | |
902 | sizeof(con2fb)) ? -EFAULT : 0; | |
903 | case FBIOPUT_CON2FBMAP: | |
904 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) | |
905 | return - EFAULT; | |
906 | if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) | |
907 | return -EINVAL; | |
908 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) | |
909 | return -EINVAL; | |
910 | #ifdef CONFIG_KMOD | |
911 | if (!registered_fb[con2fb.framebuffer]) | |
912 | try_to_load(con2fb.framebuffer); | |
913 | #endif /* CONFIG_KMOD */ | |
914 | if (!registered_fb[con2fb.framebuffer]) | |
915 | return -EINVAL; | |
916 | event.info = info; | |
917 | event.data = &con2fb; | |
918 | return notifier_call_chain(&fb_notifier_list, | |
919 | FB_EVENT_SET_CONSOLE_MAP, | |
920 | &event); | |
921 | case FBIOBLANK: | |
922 | acquire_console_sem(); | |
923 | info->flags |= FBINFO_MISC_USEREVENT; | |
924 | i = fb_blank(info, arg); | |
925 | info->flags &= ~FBINFO_MISC_USEREVENT; | |
926 | release_console_sem(); | |
927 | return i; | |
928 | default: | |
929 | if (fb->fb_ioctl == NULL) | |
930 | return -EINVAL; | |
931 | return fb->fb_ioctl(inode, file, cmd, arg, info); | |
932 | } | |
933 | } | |
934 | ||
935 | #ifdef CONFIG_COMPAT | |
936 | static long | |
937 | fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
938 | { | |
939 | int fbidx = iminor(file->f_dentry->d_inode); | |
940 | struct fb_info *info = registered_fb[fbidx]; | |
941 | struct fb_ops *fb = info->fbops; | |
942 | long ret; | |
943 | ||
944 | if (fb->fb_compat_ioctl == NULL) | |
945 | return -ENOIOCTLCMD; | |
946 | lock_kernel(); | |
947 | ret = fb->fb_compat_ioctl(file, cmd, arg, info); | |
948 | unlock_kernel(); | |
949 | return ret; | |
950 | } | |
951 | #endif | |
952 | ||
953 | static int | |
954 | fb_mmap(struct file *file, struct vm_area_struct * vma) | |
955 | { | |
956 | int fbidx = iminor(file->f_dentry->d_inode); | |
957 | struct fb_info *info = registered_fb[fbidx]; | |
958 | struct fb_ops *fb = info->fbops; | |
959 | unsigned long off; | |
960 | #if !defined(__sparc__) || defined(__sparc_v9__) | |
961 | unsigned long start; | |
962 | u32 len; | |
963 | #endif | |
964 | ||
965 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) | |
966 | return -EINVAL; | |
967 | off = vma->vm_pgoff << PAGE_SHIFT; | |
968 | if (!fb) | |
969 | return -ENODEV; | |
970 | if (fb->fb_mmap) { | |
971 | int res; | |
972 | lock_kernel(); | |
973 | res = fb->fb_mmap(info, file, vma); | |
974 | unlock_kernel(); | |
975 | return res; | |
976 | } | |
977 | ||
978 | #if defined(__sparc__) && !defined(__sparc_v9__) | |
979 | /* Should never get here, all fb drivers should have their own | |
980 | mmap routines */ | |
981 | return -EINVAL; | |
982 | #else | |
983 | /* !sparc32... */ | |
984 | lock_kernel(); | |
985 | ||
986 | /* frame buffer memory */ | |
987 | start = info->fix.smem_start; | |
988 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); | |
989 | if (off >= len) { | |
990 | /* memory mapped io */ | |
991 | off -= len; | |
992 | if (info->var.accel_flags) { | |
993 | unlock_kernel(); | |
994 | return -EINVAL; | |
995 | } | |
996 | start = info->fix.mmio_start; | |
997 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); | |
998 | } | |
999 | unlock_kernel(); | |
1000 | start &= PAGE_MASK; | |
1001 | if ((vma->vm_end - vma->vm_start + off) > len) | |
1002 | return -EINVAL; | |
1003 | off += start; | |
1004 | vma->vm_pgoff = off >> PAGE_SHIFT; | |
1005 | /* This is an IO map - tell maydump to skip this VMA */ | |
1006 | vma->vm_flags |= VM_IO | VM_RESERVED; | |
1007 | #if defined(__sparc_v9__) | |
1008 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
1009 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1010 | return -EAGAIN; | |
1011 | #else | |
1012 | #if defined(__mc68000__) | |
1013 | #if defined(CONFIG_SUN3) | |
1014 | pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; | |
1015 | #elif defined(CONFIG_MMU) | |
1016 | if (CPU_IS_020_OR_030) | |
1017 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; | |
1018 | if (CPU_IS_040_OR_060) { | |
1019 | pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; | |
1020 | /* Use no-cache mode, serialized */ | |
1021 | pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; | |
1022 | } | |
1023 | #endif | |
1024 | #elif defined(__powerpc__) | |
8b150478 | 1025 | vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT, |
1da177e4 LT |
1026 | vma->vm_end - vma->vm_start, |
1027 | vma->vm_page_prot); | |
1028 | #elif defined(__alpha__) | |
1029 | /* Caching is off in the I/O space quadrant by design. */ | |
1030 | #elif defined(__i386__) || defined(__x86_64__) | |
1031 | if (boot_cpu_data.x86 > 3) | |
1032 | pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; | |
1033 | #elif defined(__mips__) | |
1034 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1035 | #elif defined(__hppa__) | |
1036 | pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE; | |
1037 | #elif defined(__arm__) || defined(__sh__) || defined(__m32r__) | |
1038 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1039 | #elif defined(__ia64__) | |
1040 | if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start)) | |
1041 | vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); | |
1042 | else | |
1043 | vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); | |
1044 | #else | |
1045 | #warning What do we have to do here?? | |
1046 | #endif | |
1047 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, | |
1048 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) | |
1049 | return -EAGAIN; | |
1050 | #endif /* !__sparc_v9__ */ | |
1051 | return 0; | |
1052 | #endif /* !sparc32 */ | |
1053 | } | |
1054 | ||
1055 | static int | |
1056 | fb_open(struct inode *inode, struct file *file) | |
1057 | { | |
1058 | int fbidx = iminor(inode); | |
1059 | struct fb_info *info; | |
1060 | int res = 0; | |
1061 | ||
1062 | if (fbidx >= FB_MAX) | |
1063 | return -ENODEV; | |
1064 | #ifdef CONFIG_KMOD | |
1065 | if (!(info = registered_fb[fbidx])) | |
1066 | try_to_load(fbidx); | |
1067 | #endif /* CONFIG_KMOD */ | |
1068 | if (!(info = registered_fb[fbidx])) | |
1069 | return -ENODEV; | |
1070 | if (!try_module_get(info->fbops->owner)) | |
1071 | return -ENODEV; | |
1072 | if (info->fbops->fb_open) { | |
1073 | res = info->fbops->fb_open(info,1); | |
1074 | if (res) | |
1075 | module_put(info->fbops->owner); | |
1076 | } | |
1077 | return res; | |
1078 | } | |
1079 | ||
1080 | static int | |
1081 | fb_release(struct inode *inode, struct file *file) | |
1082 | { | |
1083 | int fbidx = iminor(inode); | |
1084 | struct fb_info *info; | |
1085 | ||
1086 | lock_kernel(); | |
1087 | info = registered_fb[fbidx]; | |
1088 | if (info->fbops->fb_release) | |
1089 | info->fbops->fb_release(info,1); | |
1090 | module_put(info->fbops->owner); | |
1091 | unlock_kernel(); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
1095 | static struct file_operations fb_fops = { | |
1096 | .owner = THIS_MODULE, | |
1097 | .read = fb_read, | |
1098 | .write = fb_write, | |
1099 | .ioctl = fb_ioctl, | |
1100 | #ifdef CONFIG_COMPAT | |
1101 | .compat_ioctl = fb_compat_ioctl, | |
1102 | #endif | |
1103 | .mmap = fb_mmap, | |
1104 | .open = fb_open, | |
1105 | .release = fb_release, | |
1106 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA | |
1107 | .get_unmapped_area = get_fb_unmapped_area, | |
1108 | #endif | |
1109 | }; | |
1110 | ||
56b22935 | 1111 | static struct class *fb_class; |
1da177e4 LT |
1112 | |
1113 | /** | |
1114 | * register_framebuffer - registers a frame buffer device | |
1115 | * @fb_info: frame buffer info structure | |
1116 | * | |
1117 | * Registers a frame buffer device @fb_info. | |
1118 | * | |
1119 | * Returns negative errno on error, or zero for success. | |
1120 | * | |
1121 | */ | |
1122 | ||
1123 | int | |
1124 | register_framebuffer(struct fb_info *fb_info) | |
1125 | { | |
1126 | int i; | |
1127 | struct fb_event event; | |
96fe6a21 | 1128 | struct fb_videomode mode; |
1da177e4 LT |
1129 | |
1130 | if (num_registered_fb == FB_MAX) | |
1131 | return -ENXIO; | |
1132 | num_registered_fb++; | |
1133 | for (i = 0 ; i < FB_MAX; i++) | |
1134 | if (!registered_fb[i]) | |
1135 | break; | |
1136 | fb_info->node = i; | |
1137 | ||
53f46542 | 1138 | fb_info->class_device = class_device_create(fb_class, NULL, MKDEV(FB_MAJOR, i), |
1da177e4 LT |
1139 | fb_info->device, "fb%d", i); |
1140 | if (IS_ERR(fb_info->class_device)) { | |
1141 | /* Not fatal */ | |
1142 | printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device)); | |
1143 | fb_info->class_device = NULL; | |
1144 | } else | |
1145 | fb_init_class_device(fb_info); | |
1146 | ||
1147 | if (fb_info->pixmap.addr == NULL) { | |
1148 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1149 | if (fb_info->pixmap.addr) { | |
1150 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1151 | fb_info->pixmap.buf_align = 1; | |
1152 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1153 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1154 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1155 | } | |
1156 | } | |
1157 | fb_info->pixmap.offset = 0; | |
1158 | ||
96fe6a21 | 1159 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1160 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1161 | |
96fe6a21 AD |
1162 | fb_var_to_videomode(&mode, &fb_info->var); |
1163 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1164 | registered_fb[i] = fb_info; |
1165 | ||
1166 | devfs_mk_cdev(MKDEV(FB_MAJOR, i), | |
1167 | S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i); | |
1168 | event.info = fb_info; | |
1169 | notifier_call_chain(&fb_notifier_list, | |
1170 | FB_EVENT_FB_REGISTERED, &event); | |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | ||
1175 | /** | |
1176 | * unregister_framebuffer - releases a frame buffer device | |
1177 | * @fb_info: frame buffer info structure | |
1178 | * | |
1179 | * Unregisters a frame buffer device @fb_info. | |
1180 | * | |
1181 | * Returns negative errno on error, or zero for success. | |
1182 | * | |
1183 | */ | |
1184 | ||
1185 | int | |
1186 | unregister_framebuffer(struct fb_info *fb_info) | |
1187 | { | |
1188 | int i; | |
1189 | ||
1190 | i = fb_info->node; | |
1191 | if (!registered_fb[i]) | |
1192 | return -EINVAL; | |
1193 | devfs_remove("fb/%d", i); | |
1194 | ||
1195 | if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) | |
1196 | kfree(fb_info->pixmap.addr); | |
1197 | fb_destroy_modelist(&fb_info->modelist); | |
1198 | registered_fb[i]=NULL; | |
1199 | num_registered_fb--; | |
1200 | fb_cleanup_class_device(fb_info); | |
56b22935 | 1201 | class_device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
1da177e4 LT |
1202 | return 0; |
1203 | } | |
1204 | ||
1205 | /** | |
1206 | * fb_register_client - register a client notifier | |
1207 | * @nb: notifier block to callback on events | |
1208 | */ | |
1209 | int fb_register_client(struct notifier_block *nb) | |
1210 | { | |
1211 | return notifier_chain_register(&fb_notifier_list, nb); | |
1212 | } | |
1213 | ||
1214 | /** | |
1215 | * fb_unregister_client - unregister a client notifier | |
1216 | * @nb: notifier block to callback on events | |
1217 | */ | |
1218 | int fb_unregister_client(struct notifier_block *nb) | |
1219 | { | |
1220 | return notifier_chain_unregister(&fb_notifier_list, nb); | |
1221 | } | |
1222 | ||
1223 | /** | |
1224 | * fb_set_suspend - low level driver signals suspend | |
1225 | * @info: framebuffer affected | |
1226 | * @state: 0 = resuming, !=0 = suspending | |
1227 | * | |
1228 | * This is meant to be used by low level drivers to | |
1229 | * signal suspend/resume to the core & clients. | |
1230 | * It must be called with the console semaphore held | |
1231 | */ | |
1232 | void fb_set_suspend(struct fb_info *info, int state) | |
1233 | { | |
1234 | struct fb_event event; | |
1235 | ||
1236 | event.info = info; | |
1237 | if (state) { | |
1238 | notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event); | |
1239 | info->state = FBINFO_STATE_SUSPENDED; | |
1240 | } else { | |
1241 | info->state = FBINFO_STATE_RUNNING; | |
1242 | notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event); | |
1243 | } | |
1244 | } | |
1245 | ||
1246 | /** | |
1247 | * fbmem_init - init frame buffer subsystem | |
1248 | * | |
1249 | * Initialize the frame buffer subsystem. | |
1250 | * | |
1251 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1252 | * | |
1253 | */ | |
1254 | ||
1255 | static int __init | |
1256 | fbmem_init(void) | |
1257 | { | |
1258 | create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL); | |
1259 | ||
1260 | devfs_mk_dir("fb"); | |
1261 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) | |
1262 | printk("unable to get major %d for fb devs\n", FB_MAJOR); | |
1263 | ||
56b22935 | 1264 | fb_class = class_create(THIS_MODULE, "graphics"); |
1da177e4 LT |
1265 | if (IS_ERR(fb_class)) { |
1266 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); | |
1267 | fb_class = NULL; | |
1268 | } | |
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | #ifdef MODULE | |
1273 | module_init(fbmem_init); | |
1274 | static void __exit | |
1275 | fbmem_exit(void) | |
1276 | { | |
56b22935 | 1277 | class_destroy(fb_class); |
5a340cce | 1278 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1279 | } |
1280 | ||
1281 | module_exit(fbmem_exit); | |
1282 | MODULE_LICENSE("GPL"); | |
1283 | MODULE_DESCRIPTION("Framebuffer base"); | |
1284 | #else | |
1285 | subsys_initcall(fbmem_init); | |
1286 | #endif | |
1287 | ||
1288 | int fb_new_modelist(struct fb_info *info) | |
1289 | { | |
1290 | struct fb_event event; | |
1291 | struct fb_var_screeninfo var = info->var; | |
1292 | struct list_head *pos, *n; | |
1293 | struct fb_modelist *modelist; | |
1294 | struct fb_videomode *m, mode; | |
1295 | int err = 1; | |
1296 | ||
1297 | list_for_each_safe(pos, n, &info->modelist) { | |
1298 | modelist = list_entry(pos, struct fb_modelist, list); | |
1299 | m = &modelist->mode; | |
1300 | fb_videomode_to_var(&var, m); | |
1301 | var.activate = FB_ACTIVATE_TEST; | |
1302 | err = fb_set_var(info, &var); | |
1303 | fb_var_to_videomode(&mode, &var); | |
1304 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1305 | list_del(pos); | |
1306 | kfree(pos); | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | err = 1; | |
1311 | ||
1312 | if (!list_empty(&info->modelist)) { | |
1313 | event.info = info; | |
1314 | err = notifier_call_chain(&fb_notifier_list, | |
1315 | FB_EVENT_NEW_MODELIST, | |
1316 | &event); | |
1317 | } | |
1318 | ||
1319 | return err; | |
1320 | } | |
1321 | ||
a812c94b AD |
1322 | /** |
1323 | * fb_con_duit - user<->fbcon passthrough | |
1324 | * @info: struct fb_info | |
1325 | * @event: notification event to be passed to fbcon | |
1326 | * @data: private data | |
1327 | * | |
1328 | * DESCRIPTION | |
1329 | * This function is an fbcon-user event passing channel | |
1330 | * which bypasses fbdev. This is hopefully temporary | |
1331 | * until a user interface for fbcon is created | |
1332 | */ | |
1333 | int fb_con_duit(struct fb_info *info, int event, void *data) | |
1334 | { | |
1335 | struct fb_event evnt; | |
1336 | ||
1337 | evnt.info = info; | |
1338 | evnt.data = data; | |
1339 | ||
1340 | return notifier_call_chain(&fb_notifier_list, event, &evnt); | |
1341 | } | |
1342 | EXPORT_SYMBOL(fb_con_duit); | |
1343 | ||
1da177e4 LT |
1344 | static char *video_options[FB_MAX]; |
1345 | static int ofonly; | |
1346 | ||
4dc3b16b PP |
1347 | extern const char *global_mode_option; |
1348 | ||
1da177e4 LT |
1349 | /** |
1350 | * fb_get_options - get kernel boot parameters | |
1351 | * @name: framebuffer name as it would appear in | |
1352 | * the boot parameter line | |
1353 | * (video=<name>:<options>) | |
1354 | * @option: the option will be stored here | |
1355 | * | |
1356 | * NOTE: Needed to maintain backwards compatibility | |
1357 | */ | |
1358 | int fb_get_options(char *name, char **option) | |
1359 | { | |
1360 | char *opt, *options = NULL; | |
1361 | int opt_len, retval = 0; | |
1362 | int name_len = strlen(name), i; | |
1363 | ||
1364 | if (name_len && ofonly && strncmp(name, "offb", 4)) | |
1365 | retval = 1; | |
1366 | ||
1367 | if (name_len && !retval) { | |
1368 | for (i = 0; i < FB_MAX; i++) { | |
1369 | if (video_options[i] == NULL) | |
1370 | continue; | |
1371 | opt_len = strlen(video_options[i]); | |
1372 | if (!opt_len) | |
1373 | continue; | |
1374 | opt = video_options[i]; | |
1375 | if (!strncmp(name, opt, name_len) && | |
1376 | opt[name_len] == ':') | |
1377 | options = opt + name_len + 1; | |
1378 | } | |
1379 | } | |
1380 | if (options && !strncmp(options, "off", 3)) | |
1381 | retval = 1; | |
1382 | ||
1383 | if (option) | |
1384 | *option = options; | |
1385 | ||
1386 | return retval; | |
1387 | } | |
1388 | ||
1da177e4 LT |
1389 | /** |
1390 | * video_setup - process command line options | |
1391 | * @options: string of options | |
1392 | * | |
1393 | * Process command line options for frame buffer subsystem. | |
1394 | * | |
1395 | * NOTE: This function is a __setup and __init function. | |
1396 | * It only stores the options. Drivers have to call | |
1397 | * fb_get_options() as necessary. | |
1398 | * | |
1399 | * Returns zero. | |
1400 | * | |
1401 | */ | |
75c96f85 | 1402 | static int __init video_setup(char *options) |
1da177e4 LT |
1403 | { |
1404 | int i, global = 0; | |
1405 | ||
1406 | if (!options || !*options) | |
1407 | global = 1; | |
1408 | ||
1409 | if (!global && !strncmp(options, "ofonly", 6)) { | |
1410 | ofonly = 1; | |
1411 | global = 1; | |
1412 | } | |
1413 | ||
1414 | if (!global && !strstr(options, "fb:")) { | |
1415 | global_mode_option = options; | |
1416 | global = 1; | |
1417 | } | |
1418 | ||
1419 | if (!global) { | |
1420 | for (i = 0; i < FB_MAX; i++) { | |
1421 | if (video_options[i] == NULL) { | |
1422 | video_options[i] = options; | |
1423 | break; | |
1424 | } | |
1425 | ||
1426 | } | |
1427 | } | |
1428 | ||
1429 | return 0; | |
1430 | } | |
1431 | __setup("video=", video_setup); | |
1432 | ||
1433 | /* | |
1434 | * Visible symbols for modules | |
1435 | */ | |
1436 | ||
1437 | EXPORT_SYMBOL(register_framebuffer); | |
1438 | EXPORT_SYMBOL(unregister_framebuffer); | |
1439 | EXPORT_SYMBOL(num_registered_fb); | |
1440 | EXPORT_SYMBOL(registered_fb); | |
1441 | EXPORT_SYMBOL(fb_prepare_logo); | |
1442 | EXPORT_SYMBOL(fb_show_logo); | |
1443 | EXPORT_SYMBOL(fb_set_var); | |
1444 | EXPORT_SYMBOL(fb_blank); | |
1445 | EXPORT_SYMBOL(fb_pan_display); | |
1446 | EXPORT_SYMBOL(fb_get_buffer_offset); | |
1da177e4 LT |
1447 | EXPORT_SYMBOL(fb_set_suspend); |
1448 | EXPORT_SYMBOL(fb_register_client); | |
1449 | EXPORT_SYMBOL(fb_unregister_client); | |
1450 | EXPORT_SYMBOL(fb_get_options); | |
1451 | EXPORT_SYMBOL(fb_new_modelist); | |
1452 | ||
1453 | MODULE_LICENSE("GPL"); |