blob: 8ce98a2f6f37d4139bdb8f696bd12cfcc0429190 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/module.h>
15
Arnd Bergmannc7f82d92005-11-08 21:39:19 -080016#include <linux/compat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/types.h>
18#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/smp_lock.h>
20#include <linux/kernel.h>
21#include <linux/major.h>
22#include <linux/slab.h>
23#include <linux/mm.h>
24#include <linux/mman.h>
Jon Smirla8f340e2006-07-10 04:44:12 -070025#include <linux/vt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/init.h>
27#include <linux/linux_logo.h>
28#include <linux/proc_fs.h>
29#include <linux/console.h>
30#ifdef CONFIG_KMOD
31#include <linux/kmod.h>
32#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/device.h>
35#include <linux/efi.h>
36
37#if defined(__mc68000__) || defined(CONFIG_APUS)
38#include <asm/setup.h>
39#endif
40
41#include <asm/io.h>
42#include <asm/uaccess.h>
43#include <asm/page.h>
44#include <asm/pgtable.h>
45
46#include <linux/fb.h>
47
48 /*
49 * Frame buffer device initialization and setup routines
50 */
51
52#define FBPIXMAPSIZE (1024 * 8)
53
Helge Deller0128bee2006-12-08 02:40:29 -080054struct fb_info *registered_fb[FB_MAX] __read_mostly;
55int num_registered_fb __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056
57/*
58 * Helpers
59 */
60
Antonino A. Daplasb8c90942005-09-09 13:04:37 -070061int fb_get_color_depth(struct fb_var_screeninfo *var,
62 struct fb_fix_screeninfo *fix)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -070064 int depth = 0;
65
66 if (fix->visual == FB_VISUAL_MONO01 ||
67 fix->visual == FB_VISUAL_MONO10)
68 depth = 1;
69 else {
70 if (var->green.length == var->blue.length &&
71 var->green.length == var->red.length &&
72 var->green.offset == var->blue.offset &&
73 var->green.offset == var->red.offset)
74 depth = var->green.length;
75 else
76 depth = var->green.length + var->red.length +
77 var->blue.length;
78 }
79
80 return depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081}
82EXPORT_SYMBOL(fb_get_color_depth);
83
84/*
James Simmonsf5a99512005-06-21 17:16:58 -070085 * Data padding functions.
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 */
James Simmonsf1ab5da2005-06-21 17:17:07 -070087void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
Antonino A. Daplas829e79b2005-09-09 13:10:04 -070089 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
James Simmonsf1ab5da2005-06-21 17:17:07 -070091EXPORT_SYMBOL(fb_pad_aligned_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
James Simmonsf1ab5da2005-06-21 17:17:07 -070093void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
94 u32 shift_high, u32 shift_low, u32 mod)
Linus Torvalds1da177e2005-04-16 15:20:36 -070095{
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}
James Simmonsf1ab5da2005-06-21 17:17:07 -0700121EXPORT_SYMBOL(fb_pad_unaligned_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123/*
124 * we need to lock this section since fb_cursor
125 * may use fb_imageblit()
126 */
127char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
128{
129 u32 align = buf->buf_align - 1, offset;
130 char *addr = buf->addr;
131
132 /* If IO mapped, we need to sync before access, no sharing of
133 * the pixmap is done
134 */
135 if (buf->flags & FB_PIXMAP_IO) {
136 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
137 info->fbops->fb_sync(info);
138 return addr;
139 }
140
141 /* See if we fit in the remaining pixmap space */
142 offset = buf->offset + align;
143 offset &= ~align;
144 if (offset + size > buf->size) {
145 /* We do not fit. In order to be able to re-use the buffer,
146 * we must ensure no asynchronous DMA'ing or whatever operation
147 * is in progress, we sync for that.
148 */
149 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
150 info->fbops->fb_sync(info);
151 offset = 0;
152 }
153 buf->offset = offset + size;
154 addr += offset;
155
156 return addr;
157}
158
159#ifdef CONFIG_LOGO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
161static inline unsigned safe_shift(unsigned d, int n)
162{
163 return n < 0 ? d >> -n : d << n;
164}
165
166static void fb_set_logocmap(struct fb_info *info,
167 const struct linux_logo *logo)
168{
169 struct fb_cmap palette_cmap;
170 u16 palette_green[16];
171 u16 palette_blue[16];
172 u16 palette_red[16];
173 int i, j, n;
174 const unsigned char *clut = logo->clut;
175
176 palette_cmap.start = 0;
177 palette_cmap.len = 16;
178 palette_cmap.red = palette_red;
179 palette_cmap.green = palette_green;
180 palette_cmap.blue = palette_blue;
181 palette_cmap.transp = NULL;
182
183 for (i = 0; i < logo->clutsize; i += n) {
184 n = logo->clutsize - i;
185 /* palette_cmap provides space for only 16 colors at once */
186 if (n > 16)
187 n = 16;
188 palette_cmap.start = 32 + i;
189 palette_cmap.len = n;
190 for (j = 0; j < n; ++j) {
191 palette_cmap.red[j] = clut[0] << 8 | clut[0];
192 palette_cmap.green[j] = clut[1] << 8 | clut[1];
193 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
194 clut += 3;
195 }
196 fb_set_cmap(&palette_cmap, info);
197 }
198}
199
200static void fb_set_logo_truepalette(struct fb_info *info,
201 const struct linux_logo *logo,
202 u32 *palette)
203{
Helge Deller0128bee2006-12-08 02:40:29 -0800204 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 unsigned char redmask, greenmask, bluemask;
206 int redshift, greenshift, blueshift;
207 int i;
208 const unsigned char *clut = logo->clut;
209
210 /*
211 * We have to create a temporary palette since console palette is only
212 * 16 colors long.
213 */
214 /* Bug: Doesn't obey msb_right ... (who needs that?) */
215 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
216 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
217 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
218 redshift = info->var.red.offset - (8 - info->var.red.length);
219 greenshift = info->var.green.offset - (8 - info->var.green.length);
220 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
221
222 for ( i = 0; i < logo->clutsize; i++) {
223 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
224 safe_shift((clut[1] & greenmask), greenshift) |
225 safe_shift((clut[2] & bluemask), blueshift));
226 clut += 3;
227 }
228}
229
230static void fb_set_logo_directpalette(struct fb_info *info,
231 const struct linux_logo *logo,
232 u32 *palette)
233{
234 int redshift, greenshift, blueshift;
235 int i;
236
237 redshift = info->var.red.offset;
238 greenshift = info->var.green.offset;
239 blueshift = info->var.blue.offset;
240
241 for (i = 32; i < logo->clutsize; i++)
242 palette[i] = i << redshift | i << greenshift | i << blueshift;
243}
244
245static void fb_set_logo(struct fb_info *info,
246 const struct linux_logo *logo, u8 *dst,
247 int depth)
248{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700249 int i, j, k;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 const u8 *src = logo->data;
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700251 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
252 u8 fg = 1, d;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700254 if (fb_get_color_depth(&info->var, &info->fix) == 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 fg = 7;
256
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700257 if (info->fix.visual == FB_VISUAL_MONO01 ||
258 info->fix.visual == FB_VISUAL_MONO10)
259 fg = ~((u8) (0xfff << info->var.green.length));
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 switch (depth) {
262 case 4:
263 for (i = 0; i < logo->height; i++)
264 for (j = 0; j < logo->width; src++) {
265 *dst++ = *src >> 4;
266 j++;
267 if (j < logo->width) {
268 *dst++ = *src & 0x0f;
269 j++;
270 }
271 }
272 break;
273 case 1:
274 for (i = 0; i < logo->height; i++) {
275 for (j = 0; j < logo->width; src++) {
276 d = *src ^ xor;
277 for (k = 7; k >= 0; k--) {
278 *dst++ = ((d >> k) & 1) ? fg : 0;
279 j++;
280 }
281 }
282 }
283 break;
284 }
285}
286
287/*
288 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
289 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
290 * the visual format and color depth of the framebuffer, the DAC, the
291 * pseudo_palette, and the logo data will be adjusted accordingly.
292 *
293 * Case 1 - linux_logo_clut224:
294 * Color exceeds the number of console colors (16), thus we set the hardware DAC
295 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
296 *
297 * For visuals that require color info from the pseudo_palette, we also construct
298 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
299 * will be set.
300 *
301 * Case 2 - linux_logo_vga16:
302 * The number of colors just matches the console colors, thus there is no need
303 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
304 * each byte contains color information for two pixels (upper and lower nibble).
305 * To be consistent with fb_imageblit() usage, we therefore separate the two
306 * nibbles into separate bytes. The "depth" flag will be set to 4.
307 *
308 * Case 3 - linux_logo_mono:
309 * This is similar with Case 2. Each byte contains information for 8 pixels.
310 * We isolate each bit and expand each into a byte. The "depth" flag will
311 * be set to 1.
312 */
313static struct logo_data {
314 int depth;
315 int needs_directpalette;
316 int needs_truepalette;
317 int needs_cmapreset;
318 const struct linux_logo *logo;
Helge Deller0128bee2006-12-08 02:40:29 -0800319} fb_logo __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800321static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
322{
323 u32 size = width * height, i;
324
325 out += size - 1;
326
327 for (i = size; i--; )
328 *out-- = *in++;
329}
330
331static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
332{
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700333 int i, j, h = height - 1;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800334
335 for (i = 0; i < height; i++)
336 for (j = 0; j < width; j++)
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700337 out[height * j + h - i] = *in++;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800338}
339
340static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
341{
342 int i, j, w = width - 1;
343
344 for (i = 0; i < height; i++)
345 for (j = 0; j < width; j++)
346 out[height * (w - j) + i] = *in++;
347}
348
349static void fb_rotate_logo(struct fb_info *info, u8 *dst,
350 struct fb_image *image, int rotate)
351{
352 u32 tmp;
353
354 if (rotate == FB_ROTATE_UD) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800355 fb_rotate_logo_ud(image->data, dst, image->width,
356 image->height);
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700357 image->dx = info->var.xres - image->width;
358 image->dy = info->var.yres - image->height;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800359 } else if (rotate == FB_ROTATE_CW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800360 fb_rotate_logo_cw(image->data, dst, image->width,
361 image->height);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800362 tmp = image->width;
363 image->width = image->height;
364 image->height = tmp;
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700365 image->dx = info->var.xres - image->width;
366 } else if (rotate == FB_ROTATE_CCW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800367 fb_rotate_logo_ccw(image->data, dst, image->width,
368 image->height);
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700369 tmp = image->width;
370 image->width = image->height;
371 image->height = tmp;
372 image->dy = info->var.yres - image->height;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800373 }
374
375 image->data = dst;
376}
377
378static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700379 int rotate, unsigned int num)
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800380{
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700381 unsigned int x;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800382
383 if (rotate == FB_ROTATE_UR) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700384 for (x = 0;
385 x < num && image->dx + image->width <= info->var.xres;
386 x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800387 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700388 image->dx += image->width + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800389 }
390 } else if (rotate == FB_ROTATE_UD) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700391 for (x = 0; x < num && image->dx >= 0; x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800392 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700393 image->dx -= image->width + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800394 }
395 } else if (rotate == FB_ROTATE_CW) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700396 for (x = 0;
397 x < num && image->dy + image->height <= info->var.yres;
398 x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800399 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700400 image->dy += image->height + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800401 }
402 } else if (rotate == FB_ROTATE_CCW) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700403 for (x = 0; x < num && image->dy >= 0; x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800404 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700405 image->dy -= image->height + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800406 }
407 }
408}
409
410int fb_prepare_logo(struct fb_info *info, int rotate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700412 int depth = fb_get_color_depth(&info->var, &info->fix);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800413 int yres;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414
415 memset(&fb_logo, 0, sizeof(struct logo_data));
416
417 if (info->flags & FBINFO_MISC_TILEBLITTING)
418 return 0;
419
420 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
421 depth = info->var.blue.length;
422 if (info->var.red.length < depth)
423 depth = info->var.red.length;
424 if (info->var.green.length < depth)
425 depth = info->var.green.length;
426 }
427
Antonino A. Daplas0c683db2006-06-26 00:26:36 -0700428 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
Antonino A. Daplas397eeab2006-04-10 22:55:49 -0700429 /* assume console colormap */
430 depth = 4;
431 }
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 if (depth >= 8) {
434 switch (info->fix.visual) {
435 case FB_VISUAL_TRUECOLOR:
436 fb_logo.needs_truepalette = 1;
437 break;
438 case FB_VISUAL_DIRECTCOLOR:
439 fb_logo.needs_directpalette = 1;
440 fb_logo.needs_cmapreset = 1;
441 break;
442 case FB_VISUAL_PSEUDOCOLOR:
443 fb_logo.needs_cmapreset = 1;
444 break;
445 }
446 }
447
448 /* Return if no suitable logo was found */
449 fb_logo.logo = fb_find_logo(depth);
Jasper Spaans6d9885a2005-11-24 16:53:36 +0100450
451 if (!fb_logo.logo) {
452 return 0;
453 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800455 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
456 yres = info->var.yres;
457 else
458 yres = info->var.xres;
459
Jasper Spaans6d9885a2005-11-24 16:53:36 +0100460 if (fb_logo.logo->height > yres) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 fb_logo.logo = NULL;
462 return 0;
463 }
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800464
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465 /* 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
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800475int fb_show_logo(struct fb_info *info, int rotate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476{
477 u32 *palette = NULL, *saved_pseudo_palette = NULL;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800478 unsigned char *logo_new = NULL, *logo_rotate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 struct fb_image image;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
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
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800519 image.dx = 0;
520 image.dy = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 image.width = fb_logo.logo->width;
522 image.height = fb_logo.logo->height;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800524 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 }
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800530
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700531 fb_do_show_logo(info, &image, rotate, num_online_cpus());
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800532
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 kfree(palette);
534 if (saved_pseudo_palette != NULL)
535 info->pseudo_palette = saved_pseudo_palette;
536 kfree(logo_new);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800537 kfree(logo_rotate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 return fb_logo.logo->height;
539}
540#else
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800541int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
542int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543#endif /* CONFIG_LOGO */
544
545static 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;
Geert Uytterhoevena09fd482006-10-03 01:15:11 -0700552 for (fi = registered_fb; fi < &registered_fb[FB_MAX] && clen < 4000;
553 fi++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 if (*fi)
555 clen += sprintf(buf + clen, "%d %s\n",
556 (*fi)->node,
557 (*fi)->fix.id);
558 *start = buf + offset;
559 if (clen > offset)
560 clen -= offset;
561 else
562 clen = 0;
563 return clen < len ? clen : len;
564}
565
566static ssize_t
567fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
568{
569 unsigned long p = *ppos;
Josef Sipekad9a8242006-12-08 02:37:48 -0800570 struct inode *inode = file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 int fbidx = iminor(inode);
572 struct fb_info *info = registered_fb[fbidx];
573 u32 *buffer, *dst;
574 u32 __iomem *src;
575 int c, i, cnt = 0, err = 0;
576 unsigned long total_size;
577
578 if (!info || ! info->screen_base)
579 return -ENODEV;
580
581 if (info->state != FBINFO_STATE_RUNNING)
582 return -EPERM;
583
584 if (info->fbops->fb_read)
585 return info->fbops->fb_read(file, buf, count, ppos);
586
587 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800588
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 if (total_size == 0)
590 total_size = info->fix.smem_len;
591
592 if (p >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800593 return 0;
594
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 if (count >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800596 count = total_size;
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 if (count + p > total_size)
599 count = total_size - p;
600
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
602 GFP_KERNEL);
603 if (!buffer)
604 return -ENOMEM;
605
606 src = (u32 __iomem *) (info->screen_base + p);
607
608 if (info->fbops->fb_sync)
609 info->fbops->fb_sync(info);
610
611 while (count) {
612 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
613 dst = buffer;
614 for (i = c >> 2; i--; )
615 *dst++ = fb_readl(src++);
616 if (c & 3) {
617 u8 *dst8 = (u8 *) dst;
618 u8 __iomem *src8 = (u8 __iomem *) src;
619
620 for (i = c & 3; i--;)
621 *dst8++ = fb_readb(src8++);
622
623 src = (u32 __iomem *) src8;
624 }
625
626 if (copy_to_user(buf, buffer, c)) {
627 err = -EFAULT;
628 break;
629 }
630 *ppos += c;
631 buf += c;
632 cnt += c;
633 count -= c;
634 }
635
636 kfree(buffer);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 return (err) ? err : cnt;
639}
640
641static ssize_t
642fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
643{
644 unsigned long p = *ppos;
Josef Sipekad9a8242006-12-08 02:37:48 -0800645 struct inode *inode = file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 int fbidx = iminor(inode);
647 struct fb_info *info = registered_fb[fbidx];
648 u32 *buffer, *src;
649 u32 __iomem *dst;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800650 int c, i, cnt = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651 unsigned long total_size;
652
653 if (!info || !info->screen_base)
654 return -ENODEV;
655
656 if (info->state != FBINFO_STATE_RUNNING)
657 return -EPERM;
658
659 if (info->fbops->fb_write)
660 return info->fbops->fb_write(file, buf, count, ppos);
661
662 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800663
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 if (total_size == 0)
665 total_size = info->fix.smem_len;
666
667 if (p > total_size)
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700668 return -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800669
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700670 if (count > total_size) {
671 err = -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800672 count = total_size;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700673 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800674
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700675 if (count + p > total_size) {
676 if (!err)
677 err = -ENOSPC;
678
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800679 count = total_size - p;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700680 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800681
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
683 GFP_KERNEL);
684 if (!buffer)
685 return -ENOMEM;
686
687 dst = (u32 __iomem *) (info->screen_base + p);
688
689 if (info->fbops->fb_sync)
690 info->fbops->fb_sync(info);
691
692 while (count) {
693 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
694 src = buffer;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800695
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696 if (copy_from_user(src, buf, c)) {
697 err = -EFAULT;
698 break;
699 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 for (i = c >> 2; i--; )
702 fb_writel(*src++, dst++);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800703
Linus Torvalds1da177e2005-04-16 15:20:36 -0700704 if (c & 3) {
705 u8 *src8 = (u8 *) src;
706 u8 __iomem *dst8 = (u8 __iomem *) dst;
707
708 for (i = c & 3; i--; )
709 fb_writeb(*src8++, dst8++);
710
711 dst = (u32 __iomem *) dst8;
712 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800713
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 *ppos += c;
715 buf += c;
716 cnt += c;
717 count -= c;
718 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800719
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 kfree(buffer);
721
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700722 return (cnt) ? cnt : err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723}
724
725#ifdef CONFIG_KMOD
726static void try_to_load(int fb)
727{
728 request_module("fb%d", fb);
729}
730#endif /* CONFIG_KMOD */
731
732int
733fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
734{
Antonino A. Daplas12070692005-12-12 22:17:17 -0800735 struct fb_fix_screeninfo *fix = &info->fix;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700736 int xoffset = var->xoffset;
737 int yoffset = var->yoffset;
Antonino A. Daplas12070692005-12-12 22:17:17 -0800738 int err = 0, yres = info->var.yres;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Antonino A. Daplas12070692005-12-12 22:17:17 -0800740 if (var->yoffset > 0) {
741 if (var->vmode & FB_VMODE_YWRAP) {
742 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
743 err = -EINVAL;
744 else
745 yres = 0;
746 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
747 err = -EINVAL;
748 }
749
750 if (var->xoffset > 0 && (!fix->xpanstep ||
751 (var->xoffset % fix->xpanstep)))
752 err = -EINVAL;
753
754 if (err || !info->fbops->fb_pan_display || xoffset < 0 ||
755 yoffset < 0 || var->yoffset + yres > info->var.yres_virtual ||
756 var->xoffset + info->var.xres > info->var.xres_virtual)
757 return -EINVAL;
758
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 if ((err = info->fbops->fb_pan_display(var, info)))
760 return err;
761 info->var.xoffset = var->xoffset;
762 info->var.yoffset = var->yoffset;
763 if (var->vmode & FB_VMODE_YWRAP)
764 info->var.vmode |= FB_VMODE_YWRAP;
765 else
766 info->var.vmode &= ~FB_VMODE_YWRAP;
767 return 0;
768}
769
770int
771fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
772{
Antonino A. Daplas3edea482005-08-15 21:29:11 +0800773 int err, flags = info->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774
775 if (var->activate & FB_ACTIVATE_INV_MODE) {
776 struct fb_videomode mode1, mode2;
777 int ret = 0;
778
779 fb_var_to_videomode(&mode1, var);
780 fb_var_to_videomode(&mode2, &info->var);
781 /* make sure we don't delete the videomode of current var */
782 ret = fb_mode_is_equal(&mode1, &mode2);
783
784 if (!ret) {
785 struct fb_event event;
786
787 event.info = info;
788 event.data = &mode1;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700789 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 }
791
792 if (!ret)
793 fb_delete_videomode(&mode1, &info->modelist);
794
795 return ret;
796 }
797
798 if ((var->activate & FB_ACTIVATE_FORCE) ||
799 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
800 if (!info->fbops->fb_check_var) {
801 *var = info->var;
802 return 0;
803 }
804
805 if ((err = info->fbops->fb_check_var(var, info)))
806 return err;
807
808 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
809 struct fb_videomode mode;
810 int err = 0;
811
812 info->var = *var;
813 if (info->fbops->fb_set_par)
814 info->fbops->fb_set_par(info);
815
816 fb_pan_display(info, &info->var);
817
818 fb_set_cmap(&info->cmap, info);
819
820 fb_var_to_videomode(&mode, &info->var);
821
822 if (info->modelist.prev && info->modelist.next &&
823 !list_empty(&info->modelist))
824 err = fb_add_videomode(&mode, &info->modelist);
825
Antonino A. Daplas3edea482005-08-15 21:29:11 +0800826 if (!err && (flags & FBINFO_MISC_USEREVENT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827 struct fb_event event;
Antonino A. Daplas7726e9e2005-09-09 13:04:29 -0700828 int evnt = (var->activate & FB_ACTIVATE_ALL) ?
829 FB_EVENT_MODE_CHANGE_ALL :
830 FB_EVENT_MODE_CHANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831
832 info->flags &= ~FBINFO_MISC_USEREVENT;
833 event.info = info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700834 fb_notifier_call_chain(evnt, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 }
836 }
837 }
838 return 0;
839}
840
841int
842fb_blank(struct fb_info *info, int blank)
843{
844 int ret = -EINVAL;
845
846 if (blank > FB_BLANK_POWERDOWN)
847 blank = FB_BLANK_POWERDOWN;
848
849 if (info->fbops->fb_blank)
850 ret = info->fbops->fb_blank(blank, info);
851
852 if (!ret) {
853 struct fb_event event;
854
855 event.info = info;
856 event.data = &blank;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700857 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 }
859
860 return ret;
861}
862
863static int
864fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
865 unsigned long arg)
866{
867 int fbidx = iminor(inode);
868 struct fb_info *info = registered_fb[fbidx];
869 struct fb_ops *fb = info->fbops;
870 struct fb_var_screeninfo var;
871 struct fb_fix_screeninfo fix;
872 struct fb_con2fbmap con2fb;
873 struct fb_cmap_user cmap;
874 struct fb_event event;
875 void __user *argp = (void __user *)arg;
876 int i;
877
878 if (!fb)
879 return -ENODEV;
880 switch (cmd) {
881 case FBIOGET_VSCREENINFO:
882 return copy_to_user(argp, &info->var,
883 sizeof(var)) ? -EFAULT : 0;
884 case FBIOPUT_VSCREENINFO:
885 if (copy_from_user(&var, argp, sizeof(var)))
886 return -EFAULT;
887 acquire_console_sem();
888 info->flags |= FBINFO_MISC_USEREVENT;
889 i = fb_set_var(info, &var);
890 info->flags &= ~FBINFO_MISC_USEREVENT;
891 release_console_sem();
892 if (i) return i;
893 if (copy_to_user(argp, &var, sizeof(var)))
894 return -EFAULT;
895 return 0;
896 case FBIOGET_FSCREENINFO:
897 return copy_to_user(argp, &info->fix,
898 sizeof(fix)) ? -EFAULT : 0;
899 case FBIOPUTCMAP:
900 if (copy_from_user(&cmap, argp, sizeof(cmap)))
901 return -EFAULT;
902 return (fb_set_user_cmap(&cmap, info));
903 case FBIOGETCMAP:
904 if (copy_from_user(&cmap, argp, sizeof(cmap)))
905 return -EFAULT;
906 return fb_cmap_to_user(&info->cmap, &cmap);
907 case FBIOPAN_DISPLAY:
908 if (copy_from_user(&var, argp, sizeof(var)))
909 return -EFAULT;
910 acquire_console_sem();
911 i = fb_pan_display(info, &var);
912 release_console_sem();
913 if (i)
914 return i;
915 if (copy_to_user(argp, &var, sizeof(var)))
916 return -EFAULT;
917 return 0;
918 case FBIO_CURSOR:
919 return -EINVAL;
920 case FBIOGET_CON2FBMAP:
921 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
922 return -EFAULT;
923 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
924 return -EINVAL;
925 con2fb.framebuffer = -1;
926 event.info = info;
927 event.data = &con2fb;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700928 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 return copy_to_user(argp, &con2fb,
930 sizeof(con2fb)) ? -EFAULT : 0;
931 case FBIOPUT_CON2FBMAP:
932 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
933 return - EFAULT;
934 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
935 return -EINVAL;
936 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
937 return -EINVAL;
938#ifdef CONFIG_KMOD
939 if (!registered_fb[con2fb.framebuffer])
940 try_to_load(con2fb.framebuffer);
941#endif /* CONFIG_KMOD */
942 if (!registered_fb[con2fb.framebuffer])
943 return -EINVAL;
944 event.info = info;
945 event.data = &con2fb;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700946 return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP,
947 &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 case FBIOBLANK:
949 acquire_console_sem();
950 info->flags |= FBINFO_MISC_USEREVENT;
951 i = fb_blank(info, arg);
952 info->flags &= ~FBINFO_MISC_USEREVENT;
953 release_console_sem();
954 return i;
955 default:
956 if (fb->fb_ioctl == NULL)
957 return -EINVAL;
Christoph Hellwig67a66802006-01-14 13:21:25 -0800958 return fb->fb_ioctl(info, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 }
960}
961
962#ifdef CONFIG_COMPAT
Arnd Bergmannc7f82d92005-11-08 21:39:19 -0800963struct fb_fix_screeninfo32 {
964 char id[16];
965 compat_caddr_t smem_start;
966 u32 smem_len;
967 u32 type;
968 u32 type_aux;
969 u32 visual;
970 u16 xpanstep;
971 u16 ypanstep;
972 u16 ywrapstep;
973 u32 line_length;
974 compat_caddr_t mmio_start;
975 u32 mmio_len;
976 u32 accel;
977 u16 reserved[3];
978};
979
980struct fb_cmap32 {
981 u32 start;
982 u32 len;
983 compat_caddr_t red;
984 compat_caddr_t green;
985 compat_caddr_t blue;
986 compat_caddr_t transp;
987};
988
989static int fb_getput_cmap(struct inode *inode, struct file *file,
990 unsigned int cmd, unsigned long arg)
991{
992 struct fb_cmap_user __user *cmap;
993 struct fb_cmap32 __user *cmap32;
994 __u32 data;
995 int err;
996
997 cmap = compat_alloc_user_space(sizeof(*cmap));
998 cmap32 = compat_ptr(arg);
999
1000 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1001 return -EFAULT;
1002
1003 if (get_user(data, &cmap32->red) ||
1004 put_user(compat_ptr(data), &cmap->red) ||
1005 get_user(data, &cmap32->green) ||
1006 put_user(compat_ptr(data), &cmap->green) ||
1007 get_user(data, &cmap32->blue) ||
1008 put_user(compat_ptr(data), &cmap->blue) ||
1009 get_user(data, &cmap32->transp) ||
1010 put_user(compat_ptr(data), &cmap->transp))
1011 return -EFAULT;
1012
1013 err = fb_ioctl(inode, file, cmd, (unsigned long) cmap);
1014
1015 if (!err) {
1016 if (copy_in_user(&cmap32->start,
1017 &cmap->start,
1018 2 * sizeof(__u32)))
1019 err = -EFAULT;
1020 }
1021 return err;
1022}
1023
1024static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1025 struct fb_fix_screeninfo32 __user *fix32)
1026{
1027 __u32 data;
1028 int err;
1029
1030 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1031
1032 data = (__u32) (unsigned long) fix->smem_start;
1033 err |= put_user(data, &fix32->smem_start);
1034
1035 err |= put_user(fix->smem_len, &fix32->smem_len);
1036 err |= put_user(fix->type, &fix32->type);
1037 err |= put_user(fix->type_aux, &fix32->type_aux);
1038 err |= put_user(fix->visual, &fix32->visual);
1039 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1040 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1041 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1042 err |= put_user(fix->line_length, &fix32->line_length);
1043
1044 data = (__u32) (unsigned long) fix->mmio_start;
1045 err |= put_user(data, &fix32->mmio_start);
1046
1047 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1048 err |= put_user(fix->accel, &fix32->accel);
1049 err |= copy_to_user(fix32->reserved, fix->reserved,
1050 sizeof(fix->reserved));
1051
1052 return err;
1053}
1054
1055static int fb_get_fscreeninfo(struct inode *inode, struct file *file,
1056 unsigned int cmd, unsigned long arg)
1057{
1058 mm_segment_t old_fs;
1059 struct fb_fix_screeninfo fix;
1060 struct fb_fix_screeninfo32 __user *fix32;
1061 int err;
1062
1063 fix32 = compat_ptr(arg);
1064
1065 old_fs = get_fs();
1066 set_fs(KERNEL_DS);
1067 err = fb_ioctl(inode, file, cmd, (unsigned long) &fix);
1068 set_fs(old_fs);
1069
1070 if (!err)
1071 err = do_fscreeninfo_to_user(&fix, fix32);
1072
1073 return err;
1074}
1075
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076static long
1077fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1078{
Josef Sipekad9a8242006-12-08 02:37:48 -08001079 struct inode *inode = file->f_path.dentry->d_inode;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001080 int fbidx = iminor(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 struct fb_info *info = registered_fb[fbidx];
1082 struct fb_ops *fb = info->fbops;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001083 long ret = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 lock_kernel();
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001086 switch(cmd) {
1087 case FBIOGET_VSCREENINFO:
1088 case FBIOPUT_VSCREENINFO:
1089 case FBIOPAN_DISPLAY:
1090 case FBIOGET_CON2FBMAP:
1091 case FBIOPUT_CON2FBMAP:
1092 arg = (unsigned long) compat_ptr(arg);
1093 case FBIOBLANK:
1094 ret = fb_ioctl(inode, file, cmd, arg);
1095 break;
1096
1097 case FBIOGET_FSCREENINFO:
1098 ret = fb_get_fscreeninfo(inode, file, cmd, arg);
1099 break;
1100
1101 case FBIOGETCMAP:
1102 case FBIOPUTCMAP:
1103 ret = fb_getput_cmap(inode, file, cmd, arg);
1104 break;
1105
1106 default:
1107 if (fb->fb_compat_ioctl)
Christoph Hellwig67a66802006-01-14 13:21:25 -08001108 ret = fb->fb_compat_ioctl(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001109 break;
1110 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 unlock_kernel();
1112 return ret;
1113}
1114#endif
1115
1116static int
1117fb_mmap(struct file *file, struct vm_area_struct * vma)
1118{
Josef Sipekad9a8242006-12-08 02:37:48 -08001119 int fbidx = iminor(file->f_path.dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 struct fb_info *info = registered_fb[fbidx];
1121 struct fb_ops *fb = info->fbops;
1122 unsigned long off;
1123#if !defined(__sparc__) || defined(__sparc_v9__)
1124 unsigned long start;
1125 u32 len;
1126#endif
1127
1128 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1129 return -EINVAL;
1130 off = vma->vm_pgoff << PAGE_SHIFT;
1131 if (!fb)
1132 return -ENODEV;
1133 if (fb->fb_mmap) {
1134 int res;
1135 lock_kernel();
Christoph Hellwig216d5262006-01-14 13:21:25 -08001136 res = fb->fb_mmap(info, vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 unlock_kernel();
1138 return res;
1139 }
1140
1141#if defined(__sparc__) && !defined(__sparc_v9__)
1142 /* Should never get here, all fb drivers should have their own
1143 mmap routines */
1144 return -EINVAL;
1145#else
1146 /* !sparc32... */
1147 lock_kernel();
1148
1149 /* frame buffer memory */
1150 start = info->fix.smem_start;
1151 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1152 if (off >= len) {
1153 /* memory mapped io */
1154 off -= len;
1155 if (info->var.accel_flags) {
1156 unlock_kernel();
1157 return -EINVAL;
1158 }
1159 start = info->fix.mmio_start;
1160 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1161 }
1162 unlock_kernel();
1163 start &= PAGE_MASK;
1164 if ((vma->vm_end - vma->vm_start + off) > len)
1165 return -EINVAL;
1166 off += start;
1167 vma->vm_pgoff = off >> PAGE_SHIFT;
1168 /* This is an IO map - tell maydump to skip this VMA */
1169 vma->vm_flags |= VM_IO | VM_RESERVED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170#if defined(__mc68000__)
1171#if defined(CONFIG_SUN3)
1172 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1173#elif defined(CONFIG_MMU)
1174 if (CPU_IS_020_OR_030)
1175 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1176 if (CPU_IS_040_OR_060) {
1177 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1178 /* Use no-cache mode, serialized */
1179 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1180 }
1181#endif
1182#elif defined(__powerpc__)
Roland Dreier8b150472005-10-28 17:46:18 -07001183 vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 vma->vm_end - vma->vm_start,
1185 vma->vm_page_prot);
1186#elif defined(__alpha__)
1187 /* Caching is off in the I/O space quadrant by design. */
1188#elif defined(__i386__) || defined(__x86_64__)
1189 if (boot_cpu_data.x86 > 3)
1190 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
David S. Miller14778d92006-03-21 02:29:39 -08001191#elif defined(__mips__) || defined(__sparc_v9__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001192 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1193#elif defined(__hppa__)
1194 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1195#elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
1196 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1197#elif defined(__ia64__)
1198 if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
1199 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1200 else
1201 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1202#else
1203#warning What do we have to do here??
1204#endif
1205 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1206 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1207 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 return 0;
1209#endif /* !sparc32 */
1210}
1211
1212static int
1213fb_open(struct inode *inode, struct file *file)
1214{
1215 int fbidx = iminor(inode);
1216 struct fb_info *info;
1217 int res = 0;
1218
1219 if (fbidx >= FB_MAX)
1220 return -ENODEV;
1221#ifdef CONFIG_KMOD
1222 if (!(info = registered_fb[fbidx]))
1223 try_to_load(fbidx);
1224#endif /* CONFIG_KMOD */
1225 if (!(info = registered_fb[fbidx]))
1226 return -ENODEV;
1227 if (!try_module_get(info->fbops->owner))
1228 return -ENODEV;
Thomas Koellercae8a122006-01-09 20:53:48 -08001229 file->private_data = info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 if (info->fbops->fb_open) {
1231 res = info->fbops->fb_open(info,1);
1232 if (res)
1233 module_put(info->fbops->owner);
1234 }
1235 return res;
1236}
1237
1238static int
1239fb_release(struct inode *inode, struct file *file)
1240{
Thomas Koellercae8a122006-01-09 20:53:48 -08001241 struct fb_info * const info = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242
1243 lock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 if (info->fbops->fb_release)
1245 info->fbops->fb_release(info,1);
1246 module_put(info->fbops->owner);
1247 unlock_kernel();
1248 return 0;
1249}
1250
Helge Deller0128bee2006-12-08 02:40:29 -08001251static const struct file_operations fb_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 .owner = THIS_MODULE,
1253 .read = fb_read,
1254 .write = fb_write,
1255 .ioctl = fb_ioctl,
1256#ifdef CONFIG_COMPAT
1257 .compat_ioctl = fb_compat_ioctl,
1258#endif
1259 .mmap = fb_mmap,
1260 .open = fb_open,
1261 .release = fb_release,
1262#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1263 .get_unmapped_area = get_fb_unmapped_area,
1264#endif
Paul Mundt5e841b82007-05-08 00:37:41 -07001265#ifdef CONFIG_FB_DEFERRED_IO
1266 .fsync = fb_deferred_io_fsync,
1267#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268};
1269
Antonino A. Daplas9a179172006-06-26 00:27:05 -07001270struct class *fb_class;
1271EXPORT_SYMBOL(fb_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001272/**
1273 * register_framebuffer - registers a frame buffer device
1274 * @fb_info: frame buffer info structure
1275 *
1276 * Registers a frame buffer device @fb_info.
1277 *
1278 * Returns negative errno on error, or zero for success.
1279 *
1280 */
1281
1282int
1283register_framebuffer(struct fb_info *fb_info)
1284{
1285 int i;
1286 struct fb_event event;
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001287 struct fb_videomode mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288
1289 if (num_registered_fb == FB_MAX)
1290 return -ENXIO;
1291 num_registered_fb++;
1292 for (i = 0 ; i < FB_MAX; i++)
1293 if (!registered_fb[i])
1294 break;
1295 fb_info->node = i;
1296
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001297 fb_info->dev = device_create(fb_class, fb_info->device,
1298 MKDEV(FB_MAJOR, i), "fb%d", i);
1299 if (IS_ERR(fb_info->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 /* Not fatal */
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001301 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1302 fb_info->dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 } else
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001304 fb_init_device(fb_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305
1306 if (fb_info->pixmap.addr == NULL) {
1307 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1308 if (fb_info->pixmap.addr) {
1309 fb_info->pixmap.size = FBPIXMAPSIZE;
1310 fb_info->pixmap.buf_align = 1;
1311 fb_info->pixmap.scan_align = 1;
James Simmons58a60642005-06-21 17:17:08 -07001312 fb_info->pixmap.access_align = 32;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1314 }
1315 }
1316 fb_info->pixmap.offset = 0;
1317
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001318 if (!fb_info->modelist.prev || !fb_info->modelist.next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 INIT_LIST_HEAD(&fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001321 fb_var_to_videomode(&mode, &fb_info->var);
1322 fb_add_videomode(&mode, &fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001323 registered_fb[i] = fb_info;
1324
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 event.info = fb_info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001326 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 return 0;
1328}
1329
1330
1331/**
1332 * unregister_framebuffer - releases a frame buffer device
1333 * @fb_info: frame buffer info structure
1334 *
1335 * Unregisters a frame buffer device @fb_info.
1336 *
1337 * Returns negative errno on error, or zero for success.
1338 *
1339 */
1340
1341int
1342unregister_framebuffer(struct fb_info *fb_info)
1343{
Antonino A. Daplase614b182006-06-26 00:27:09 -07001344 struct fb_event event;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345 int i;
1346
1347 i = fb_info->node;
1348 if (!registered_fb[i])
1349 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001350
Antonino A. Daplase614b182006-06-26 00:27:09 -07001351 if (fb_info->pixmap.addr &&
1352 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 kfree(fb_info->pixmap.addr);
1354 fb_destroy_modelist(&fb_info->modelist);
1355 registered_fb[i]=NULL;
1356 num_registered_fb--;
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001357 fb_cleanup_device(fb_info);
1358 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
Antonino A. Daplase614b182006-06-26 00:27:09 -07001359 event.info = fb_info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001360 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 return 0;
1362}
1363
1364/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 * fb_set_suspend - low level driver signals suspend
1366 * @info: framebuffer affected
1367 * @state: 0 = resuming, !=0 = suspending
1368 *
1369 * This is meant to be used by low level drivers to
1370 * signal suspend/resume to the core & clients.
1371 * It must be called with the console semaphore held
1372 */
1373void fb_set_suspend(struct fb_info *info, int state)
1374{
1375 struct fb_event event;
1376
1377 event.info = info;
1378 if (state) {
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001379 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 info->state = FBINFO_STATE_SUSPENDED;
1381 } else {
1382 info->state = FBINFO_STATE_RUNNING;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001383 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 }
1385}
1386
1387/**
1388 * fbmem_init - init frame buffer subsystem
1389 *
1390 * Initialize the frame buffer subsystem.
1391 *
1392 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1393 *
1394 */
1395
1396static int __init
1397fbmem_init(void)
1398{
1399 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1400
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1402 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1403
gregkh@suse.de56b22932005-03-23 10:01:41 -08001404 fb_class = class_create(THIS_MODULE, "graphics");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001405 if (IS_ERR(fb_class)) {
1406 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1407 fb_class = NULL;
1408 }
1409 return 0;
1410}
1411
1412#ifdef MODULE
1413module_init(fbmem_init);
1414static void __exit
1415fbmem_exit(void)
1416{
gregkh@suse.de56b22932005-03-23 10:01:41 -08001417 class_destroy(fb_class);
Jon Smirl5a340cc2005-07-27 11:46:04 -07001418 unregister_chrdev(FB_MAJOR, "fb");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419}
1420
1421module_exit(fbmem_exit);
1422MODULE_LICENSE("GPL");
1423MODULE_DESCRIPTION("Framebuffer base");
1424#else
1425subsys_initcall(fbmem_init);
1426#endif
1427
1428int fb_new_modelist(struct fb_info *info)
1429{
1430 struct fb_event event;
1431 struct fb_var_screeninfo var = info->var;
1432 struct list_head *pos, *n;
1433 struct fb_modelist *modelist;
1434 struct fb_videomode *m, mode;
1435 int err = 1;
1436
1437 list_for_each_safe(pos, n, &info->modelist) {
1438 modelist = list_entry(pos, struct fb_modelist, list);
1439 m = &modelist->mode;
1440 fb_videomode_to_var(&var, m);
1441 var.activate = FB_ACTIVATE_TEST;
1442 err = fb_set_var(info, &var);
1443 fb_var_to_videomode(&mode, &var);
1444 if (err || !fb_mode_is_equal(m, &mode)) {
1445 list_del(pos);
1446 kfree(pos);
1447 }
1448 }
1449
1450 err = 1;
1451
1452 if (!list_empty(&info->modelist)) {
1453 event.info = info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001454 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001455 }
1456
1457 return err;
1458}
1459
Helge Deller0128bee2006-12-08 02:40:29 -08001460static char *video_options[FB_MAX] __read_mostly;
1461static int ofonly __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001462
Pavel Pisa4dc3b162005-05-01 08:59:25 -07001463extern const char *global_mode_option;
1464
Linus Torvalds1da177e2005-04-16 15:20:36 -07001465/**
1466 * fb_get_options - get kernel boot parameters
1467 * @name: framebuffer name as it would appear in
1468 * the boot parameter line
1469 * (video=<name>:<options>)
1470 * @option: the option will be stored here
1471 *
1472 * NOTE: Needed to maintain backwards compatibility
1473 */
1474int fb_get_options(char *name, char **option)
1475{
1476 char *opt, *options = NULL;
1477 int opt_len, retval = 0;
1478 int name_len = strlen(name), i;
1479
1480 if (name_len && ofonly && strncmp(name, "offb", 4))
1481 retval = 1;
1482
1483 if (name_len && !retval) {
1484 for (i = 0; i < FB_MAX; i++) {
1485 if (video_options[i] == NULL)
1486 continue;
1487 opt_len = strlen(video_options[i]);
1488 if (!opt_len)
1489 continue;
1490 opt = video_options[i];
1491 if (!strncmp(name, opt, name_len) &&
1492 opt[name_len] == ':')
1493 options = opt + name_len + 1;
1494 }
1495 }
1496 if (options && !strncmp(options, "off", 3))
1497 retval = 1;
1498
1499 if (option)
1500 *option = options;
1501
1502 return retval;
1503}
1504
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001505#ifndef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001506/**
1507 * video_setup - process command line options
1508 * @options: string of options
1509 *
1510 * Process command line options for frame buffer subsystem.
1511 *
1512 * NOTE: This function is a __setup and __init function.
1513 * It only stores the options. Drivers have to call
1514 * fb_get_options() as necessary.
1515 *
1516 * Returns zero.
1517 *
1518 */
Adrian Bunk75c96f82005-05-05 16:16:09 -07001519static int __init video_setup(char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520{
1521 int i, global = 0;
1522
1523 if (!options || !*options)
1524 global = 1;
1525
1526 if (!global && !strncmp(options, "ofonly", 6)) {
1527 ofonly = 1;
1528 global = 1;
1529 }
1530
1531 if (!global && !strstr(options, "fb:")) {
1532 global_mode_option = options;
1533 global = 1;
1534 }
1535
1536 if (!global) {
1537 for (i = 0; i < FB_MAX; i++) {
1538 if (video_options[i] == NULL) {
1539 video_options[i] = options;
1540 break;
1541 }
1542
1543 }
1544 }
1545
OGAWA Hirofumi9b410462006-03-31 02:30:33 -08001546 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547}
1548__setup("video=", video_setup);
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001549#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001550
1551 /*
1552 * Visible symbols for modules
1553 */
1554
1555EXPORT_SYMBOL(register_framebuffer);
1556EXPORT_SYMBOL(unregister_framebuffer);
1557EXPORT_SYMBOL(num_registered_fb);
1558EXPORT_SYMBOL(registered_fb);
1559EXPORT_SYMBOL(fb_prepare_logo);
1560EXPORT_SYMBOL(fb_show_logo);
1561EXPORT_SYMBOL(fb_set_var);
1562EXPORT_SYMBOL(fb_blank);
1563EXPORT_SYMBOL(fb_pan_display);
1564EXPORT_SYMBOL(fb_get_buffer_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565EXPORT_SYMBOL(fb_set_suspend);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001566EXPORT_SYMBOL(fb_get_options);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001567
1568MODULE_LICENSE("GPL");