blob: 99bbd282ce634186e5d28f9a13cd9ba78658ddc2 [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/kernel.h>
20#include <linux/major.h>
21#include <linux/slab.h>
22#include <linux/mm.h>
23#include <linux/mman.h>
Jon Smirla8f340e2006-07-10 04:44:12 -070024#include <linux/vt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/init.h>
26#include <linux/linux_logo.h>
27#include <linux/proc_fs.h>
Alexey Dobriyan0aa16342008-04-28 02:15:42 -070028#include <linux/seq_file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/console.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/kmod.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/device.h>
33#include <linux/efi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/fb.h>
35
Antonino A. Daplas10eb2652007-07-17 04:05:27 -070036#include <asm/fb.h>
37
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039 /*
40 * Frame buffer device initialization and setup routines
41 */
42
43#define FBPIXMAPSIZE (1024 * 8)
44
Helge Deller0128bee2006-12-08 02:40:29 -080045struct fb_info *registered_fb[FB_MAX] __read_mostly;
46int num_registered_fb __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Andrew Morton6a7f2822009-03-31 15:25:19 -070048int lock_fb_info(struct fb_info *info)
49{
50 mutex_lock(&info->lock);
51 if (!info->fbops) {
52 mutex_unlock(&info->lock);
53 return 0;
54 }
55 return 1;
56}
57EXPORT_SYMBOL(lock_fb_info);
58
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/*
60 * Helpers
61 */
62
Antonino A. Daplasb8c90942005-09-09 13:04:37 -070063int fb_get_color_depth(struct fb_var_screeninfo *var,
64 struct fb_fix_screeninfo *fix)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -070066 int depth = 0;
67
68 if (fix->visual == FB_VISUAL_MONO01 ||
69 fix->visual == FB_VISUAL_MONO10)
70 depth = 1;
71 else {
72 if (var->green.length == var->blue.length &&
73 var->green.length == var->red.length &&
74 var->green.offset == var->blue.offset &&
75 var->green.offset == var->red.offset)
76 depth = var->green.length;
77 else
78 depth = var->green.length + var->red.length +
79 var->blue.length;
80 }
81
82 return depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083}
84EXPORT_SYMBOL(fb_get_color_depth);
85
86/*
James Simmonsf5a99512005-06-21 17:16:58 -070087 * Data padding functions.
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 */
James Simmonsf1ab5da2005-06-21 17:17:07 -070089void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
Antonino A. Daplas829e79b2005-09-09 13:10:04 -070091 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
Linus Torvalds1da177e2005-04-16 15:20:36 -070092}
James Simmonsf1ab5da2005-06-21 17:17:07 -070093EXPORT_SYMBOL(fb_pad_aligned_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
James Simmonsf1ab5da2005-06-21 17:17:07 -070095void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
96 u32 shift_high, u32 shift_low, u32 mod)
Linus Torvalds1da177e2005-04-16 15:20:36 -070097{
98 u8 mask = (u8) (0xfff << shift_high), tmp;
99 int i, j;
100
101 for (i = height; i--; ) {
102 for (j = 0; j < idx; j++) {
103 tmp = dst[j];
104 tmp &= mask;
105 tmp |= *src >> shift_low;
106 dst[j] = tmp;
107 tmp = *src << shift_high;
108 dst[j+1] = tmp;
109 src++;
110 }
111 tmp = dst[idx];
112 tmp &= mask;
113 tmp |= *src >> shift_low;
114 dst[idx] = tmp;
115 if (shift_high < mod) {
116 tmp = *src << shift_high;
117 dst[idx+1] = tmp;
118 }
119 src++;
120 dst += d_pitch;
121 }
122}
James Simmonsf1ab5da2005-06-21 17:17:07 -0700123EXPORT_SYMBOL(fb_pad_unaligned_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
125/*
126 * we need to lock this section since fb_cursor
127 * may use fb_imageblit()
128 */
129char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
130{
131 u32 align = buf->buf_align - 1, offset;
132 char *addr = buf->addr;
133
134 /* If IO mapped, we need to sync before access, no sharing of
135 * the pixmap is done
136 */
137 if (buf->flags & FB_PIXMAP_IO) {
138 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
139 info->fbops->fb_sync(info);
140 return addr;
141 }
142
143 /* See if we fit in the remaining pixmap space */
144 offset = buf->offset + align;
145 offset &= ~align;
146 if (offset + size > buf->size) {
147 /* We do not fit. In order to be able to re-use the buffer,
148 * we must ensure no asynchronous DMA'ing or whatever operation
149 * is in progress, we sync for that.
150 */
151 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
152 info->fbops->fb_sync(info);
153 offset = 0;
154 }
155 buf->offset = offset + size;
156 addr += offset;
157
158 return addr;
159}
160
161#ifdef CONFIG_LOGO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163static inline unsigned safe_shift(unsigned d, int n)
164{
165 return n < 0 ? d >> -n : d << n;
166}
167
168static void fb_set_logocmap(struct fb_info *info,
169 const struct linux_logo *logo)
170{
171 struct fb_cmap palette_cmap;
172 u16 palette_green[16];
173 u16 palette_blue[16];
174 u16 palette_red[16];
175 int i, j, n;
176 const unsigned char *clut = logo->clut;
177
178 palette_cmap.start = 0;
179 palette_cmap.len = 16;
180 palette_cmap.red = palette_red;
181 palette_cmap.green = palette_green;
182 palette_cmap.blue = palette_blue;
183 palette_cmap.transp = NULL;
184
185 for (i = 0; i < logo->clutsize; i += n) {
186 n = logo->clutsize - i;
187 /* palette_cmap provides space for only 16 colors at once */
188 if (n > 16)
189 n = 16;
190 palette_cmap.start = 32 + i;
191 palette_cmap.len = n;
192 for (j = 0; j < n; ++j) {
193 palette_cmap.red[j] = clut[0] << 8 | clut[0];
194 palette_cmap.green[j] = clut[1] << 8 | clut[1];
195 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
196 clut += 3;
197 }
198 fb_set_cmap(&palette_cmap, info);
199 }
200}
201
202static void fb_set_logo_truepalette(struct fb_info *info,
203 const struct linux_logo *logo,
204 u32 *palette)
205{
Helge Deller0128bee2006-12-08 02:40:29 -0800206 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 unsigned char redmask, greenmask, bluemask;
208 int redshift, greenshift, blueshift;
209 int i;
210 const unsigned char *clut = logo->clut;
211
212 /*
213 * We have to create a temporary palette since console palette is only
214 * 16 colors long.
215 */
216 /* Bug: Doesn't obey msb_right ... (who needs that?) */
217 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
218 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
219 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
220 redshift = info->var.red.offset - (8 - info->var.red.length);
221 greenshift = info->var.green.offset - (8 - info->var.green.length);
222 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
223
224 for ( i = 0; i < logo->clutsize; i++) {
225 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
226 safe_shift((clut[1] & greenmask), greenshift) |
227 safe_shift((clut[2] & bluemask), blueshift));
228 clut += 3;
229 }
230}
231
232static void fb_set_logo_directpalette(struct fb_info *info,
233 const struct linux_logo *logo,
234 u32 *palette)
235{
236 int redshift, greenshift, blueshift;
237 int i;
238
239 redshift = info->var.red.offset;
240 greenshift = info->var.green.offset;
241 blueshift = info->var.blue.offset;
242
Clemens Ladischcf7ee552008-11-19 15:36:10 -0800243 for (i = 32; i < 32 + logo->clutsize; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 palette[i] = i << redshift | i << greenshift | i << blueshift;
245}
246
247static void fb_set_logo(struct fb_info *info,
248 const struct linux_logo *logo, u8 *dst,
249 int depth)
250{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700251 int i, j, k;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 const u8 *src = logo->data;
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700253 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
254 u8 fg = 1, d;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Antonino A. Daplas1692b372007-07-31 00:37:36 -0700256 switch (fb_get_color_depth(&info->var, &info->fix)) {
257 case 1:
258 fg = 1;
259 break;
260 case 2:
261 fg = 3;
262 break;
263 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 fg = 7;
Antonino A. Daplas1692b372007-07-31 00:37:36 -0700265 break;
266 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700268 if (info->fix.visual == FB_VISUAL_MONO01 ||
269 info->fix.visual == FB_VISUAL_MONO10)
270 fg = ~((u8) (0xfff << info->var.green.length));
271
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 switch (depth) {
273 case 4:
274 for (i = 0; i < logo->height; i++)
275 for (j = 0; j < logo->width; src++) {
276 *dst++ = *src >> 4;
277 j++;
278 if (j < logo->width) {
279 *dst++ = *src & 0x0f;
280 j++;
281 }
282 }
283 break;
284 case 1:
285 for (i = 0; i < logo->height; i++) {
286 for (j = 0; j < logo->width; src++) {
287 d = *src ^ xor;
288 for (k = 7; k >= 0; k--) {
289 *dst++ = ((d >> k) & 1) ? fg : 0;
290 j++;
291 }
292 }
293 }
294 break;
295 }
296}
297
298/*
299 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
300 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
301 * the visual format and color depth of the framebuffer, the DAC, the
302 * pseudo_palette, and the logo data will be adjusted accordingly.
303 *
304 * Case 1 - linux_logo_clut224:
305 * Color exceeds the number of console colors (16), thus we set the hardware DAC
306 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
307 *
308 * For visuals that require color info from the pseudo_palette, we also construct
309 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
310 * will be set.
311 *
312 * Case 2 - linux_logo_vga16:
313 * The number of colors just matches the console colors, thus there is no need
314 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
315 * each byte contains color information for two pixels (upper and lower nibble).
316 * To be consistent with fb_imageblit() usage, we therefore separate the two
317 * nibbles into separate bytes. The "depth" flag will be set to 4.
318 *
319 * Case 3 - linux_logo_mono:
320 * This is similar with Case 2. Each byte contains information for 8 pixels.
321 * We isolate each bit and expand each into a byte. The "depth" flag will
322 * be set to 1.
323 */
324static struct logo_data {
325 int depth;
326 int needs_directpalette;
327 int needs_truepalette;
328 int needs_cmapreset;
329 const struct linux_logo *logo;
Helge Deller0128bee2006-12-08 02:40:29 -0800330} fb_logo __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800332static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
333{
334 u32 size = width * height, i;
335
336 out += size - 1;
337
338 for (i = size; i--; )
339 *out-- = *in++;
340}
341
342static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
343{
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700344 int i, j, h = height - 1;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800345
346 for (i = 0; i < height; i++)
347 for (j = 0; j < width; j++)
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700348 out[height * j + h - i] = *in++;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800349}
350
351static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
352{
353 int i, j, w = width - 1;
354
355 for (i = 0; i < height; i++)
356 for (j = 0; j < width; j++)
357 out[height * (w - j) + i] = *in++;
358}
359
360static void fb_rotate_logo(struct fb_info *info, u8 *dst,
361 struct fb_image *image, int rotate)
362{
363 u32 tmp;
364
365 if (rotate == FB_ROTATE_UD) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800366 fb_rotate_logo_ud(image->data, dst, image->width,
367 image->height);
Geert Uytterhoevenabed5d12007-05-08 00:37:57 -0700368 image->dx = info->var.xres - image->width - image->dx;
369 image->dy = info->var.yres - image->height - image->dy;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800370 } else if (rotate == FB_ROTATE_CW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800371 fb_rotate_logo_cw(image->data, dst, image->width,
372 image->height);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800373 tmp = image->width;
374 image->width = image->height;
375 image->height = tmp;
Geert Uytterhoevenabed5d12007-05-08 00:37:57 -0700376 tmp = image->dy;
377 image->dy = image->dx;
378 image->dx = info->var.xres - image->width - tmp;
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700379 } else if (rotate == FB_ROTATE_CCW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800380 fb_rotate_logo_ccw(image->data, dst, image->width,
381 image->height);
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700382 tmp = image->width;
383 image->width = image->height;
384 image->height = tmp;
Geert Uytterhoevenabed5d12007-05-08 00:37:57 -0700385 tmp = image->dx;
386 image->dx = image->dy;
387 image->dy = info->var.yres - image->height - tmp;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800388 }
389
390 image->data = dst;
391}
392
393static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700394 int rotate, unsigned int num)
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800395{
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700396 unsigned int x;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800397
398 if (rotate == FB_ROTATE_UR) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700399 for (x = 0;
400 x < num && image->dx + image->width <= info->var.xres;
401 x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800402 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700403 image->dx += image->width + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800404 }
405 } else if (rotate == FB_ROTATE_UD) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700406 for (x = 0; x < num && image->dx >= 0; x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800407 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700408 image->dx -= image->width + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800409 }
410 } else if (rotate == FB_ROTATE_CW) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700411 for (x = 0;
412 x < num && image->dy + image->height <= info->var.yres;
413 x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800414 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700415 image->dy += image->height + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800416 }
417 } else if (rotate == FB_ROTATE_CCW) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700418 for (x = 0; x < num && image->dy >= 0; x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800419 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700420 image->dy -= image->height + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800421 }
422 }
423}
424
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700425static int fb_show_logo_line(struct fb_info *info, int rotate,
426 const struct linux_logo *logo, int y,
427 unsigned int n)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428{
429 u32 *palette = NULL, *saved_pseudo_palette = NULL;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800430 unsigned char *logo_new = NULL, *logo_rotate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 struct fb_image image;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
433 /* Return if the frame buffer is not mapped or suspended */
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700434 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
Antonino A. Daplas70802c62007-05-08 00:38:14 -0700435 info->flags & FBINFO_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 return 0;
437
438 image.depth = 8;
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700439 image.data = logo->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
441 if (fb_logo.needs_cmapreset)
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700442 fb_set_logocmap(info, logo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700444 if (fb_logo.needs_truepalette ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 fb_logo.needs_directpalette) {
446 palette = kmalloc(256 * 4, GFP_KERNEL);
447 if (palette == NULL)
448 return 0;
449
450 if (fb_logo.needs_truepalette)
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700451 fb_set_logo_truepalette(info, logo, palette);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 else
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700453 fb_set_logo_directpalette(info, logo, palette);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454
455 saved_pseudo_palette = info->pseudo_palette;
456 info->pseudo_palette = palette;
457 }
458
459 if (fb_logo.depth <= 4) {
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700460 logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 if (logo_new == NULL) {
462 kfree(palette);
463 if (saved_pseudo_palette)
464 info->pseudo_palette = saved_pseudo_palette;
465 return 0;
466 }
467 image.data = logo_new;
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700468 fb_set_logo(info, logo, logo_new, fb_logo.depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 }
470
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800471 image.dx = 0;
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700472 image.dy = y;
473 image.width = logo->width;
474 image.height = logo->height;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800476 if (rotate) {
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700477 logo_rotate = kmalloc(logo->width *
478 logo->height, GFP_KERNEL);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800479 if (logo_rotate)
480 fb_rotate_logo(info, logo_rotate, &image, rotate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 }
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800482
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700483 fb_do_show_logo(info, &image, rotate, n);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 kfree(palette);
486 if (saved_pseudo_palette != NULL)
487 info->pseudo_palette = saved_pseudo_palette;
488 kfree(logo_new);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800489 kfree(logo_rotate);
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700490 return logo->height;
491}
492
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700493
494#ifdef CONFIG_FB_LOGO_EXTRA
495
496#define FB_LOGO_EX_NUM_MAX 10
497static struct logo_data_extra {
498 const struct linux_logo *logo;
499 unsigned int n;
500} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
501static unsigned int fb_logo_ex_num;
502
503void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
504{
505 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
506 return;
507
508 fb_logo_ex[fb_logo_ex_num].logo = logo;
509 fb_logo_ex[fb_logo_ex_num].n = n;
510 fb_logo_ex_num++;
511}
512
513static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
514 unsigned int yres)
515{
516 unsigned int i;
517
518 /* FIXME: logo_ex supports only truecolor fb. */
519 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
520 fb_logo_ex_num = 0;
521
522 for (i = 0; i < fb_logo_ex_num; i++) {
Geert Uytterhoeven4fb6de22009-01-06 14:42:37 -0800523 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
524 fb_logo_ex[i].logo = NULL;
525 continue;
526 }
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700527 height += fb_logo_ex[i].logo->height;
528 if (height > yres) {
529 height -= fb_logo_ex[i].logo->height;
530 fb_logo_ex_num = i;
531 break;
532 }
533 }
534 return height;
535}
536
537static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
538{
539 unsigned int i;
540
541 for (i = 0; i < fb_logo_ex_num; i++)
542 y += fb_show_logo_line(info, rotate,
543 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
544
545 return y;
546}
547
548#else /* !CONFIG_FB_LOGO_EXTRA */
549
550static inline int fb_prepare_extra_logos(struct fb_info *info,
551 unsigned int height,
552 unsigned int yres)
553{
554 return height;
555}
556
557static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
558{
559 return y;
560}
561
562#endif /* CONFIG_FB_LOGO_EXTRA */
563
564
565int fb_prepare_logo(struct fb_info *info, int rotate)
566{
567 int depth = fb_get_color_depth(&info->var, &info->fix);
568 unsigned int yres;
569
570 memset(&fb_logo, 0, sizeof(struct logo_data));
571
572 if (info->flags & FBINFO_MISC_TILEBLITTING ||
573 info->flags & FBINFO_MODULE)
574 return 0;
575
576 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
577 depth = info->var.blue.length;
578 if (info->var.red.length < depth)
579 depth = info->var.red.length;
580 if (info->var.green.length < depth)
581 depth = info->var.green.length;
582 }
583
584 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
585 /* assume console colormap */
586 depth = 4;
587 }
588
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700589 /* Return if no suitable logo was found */
590 fb_logo.logo = fb_find_logo(depth);
591
592 if (!fb_logo.logo) {
593 return 0;
594 }
595
596 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
597 yres = info->var.yres;
598 else
599 yres = info->var.xres;
600
601 if (fb_logo.logo->height > yres) {
602 fb_logo.logo = NULL;
603 return 0;
604 }
605
606 /* What depth we asked for might be different from what we get */
607 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
608 fb_logo.depth = 8;
609 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
610 fb_logo.depth = 4;
611 else
612 fb_logo.depth = 1;
613
Antonino A. Daplas1692b372007-07-31 00:37:36 -0700614
615 if (fb_logo.depth > 4 && depth > 4) {
616 switch (info->fix.visual) {
617 case FB_VISUAL_TRUECOLOR:
618 fb_logo.needs_truepalette = 1;
619 break;
620 case FB_VISUAL_DIRECTCOLOR:
621 fb_logo.needs_directpalette = 1;
622 fb_logo.needs_cmapreset = 1;
623 break;
624 case FB_VISUAL_PSEUDOCOLOR:
625 fb_logo.needs_cmapreset = 1;
626 break;
627 }
628 }
629
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700630 return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
631}
632
Geert Uytterhoeven90da63e2007-07-17 04:05:50 -0700633int fb_show_logo(struct fb_info *info, int rotate)
634{
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700635 int y;
636
637 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
638 num_online_cpus());
639 y = fb_show_extra_logos(info, y, rotate);
640
641 return y;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642}
643#else
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800644int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
645int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646#endif /* CONFIG_LOGO */
647
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700648static void *fb_seq_start(struct seq_file *m, loff_t *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649{
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700650 return (*pos < FB_MAX) ? pos : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651}
652
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700653static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
654{
655 (*pos)++;
656 return (*pos < FB_MAX) ? pos : NULL;
657}
658
659static void fb_seq_stop(struct seq_file *m, void *v)
660{
661}
662
663static int fb_seq_show(struct seq_file *m, void *v)
664{
665 int i = *(loff_t *)v;
666 struct fb_info *fi = registered_fb[i];
667
668 if (fi)
669 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
670 return 0;
671}
672
673static const struct seq_operations proc_fb_seq_ops = {
674 .start = fb_seq_start,
675 .next = fb_seq_next,
676 .stop = fb_seq_stop,
677 .show = fb_seq_show,
678};
679
680static int proc_fb_open(struct inode *inode, struct file *file)
681{
682 return seq_open(file, &proc_fb_seq_ops);
683}
684
685static const struct file_operations fb_proc_fops = {
686 .owner = THIS_MODULE,
687 .open = proc_fb_open,
688 .read = seq_read,
689 .llseek = seq_lseek,
690 .release = seq_release,
691};
692
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693static ssize_t
694fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
695{
696 unsigned long p = *ppos;
Josef Sipekad9a8242006-12-08 02:37:48 -0800697 struct inode *inode = file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 int fbidx = iminor(inode);
699 struct fb_info *info = registered_fb[fbidx];
700 u32 *buffer, *dst;
701 u32 __iomem *src;
702 int c, i, cnt = 0, err = 0;
703 unsigned long total_size;
704
705 if (!info || ! info->screen_base)
706 return -ENODEV;
707
708 if (info->state != FBINFO_STATE_RUNNING)
709 return -EPERM;
710
711 if (info->fbops->fb_read)
Antonino A. Daplas3f9b0882007-05-08 00:39:02 -0700712 return info->fbops->fb_read(info, buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713
714 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 if (total_size == 0)
717 total_size = info->fix.smem_len;
718
719 if (p >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800720 return 0;
721
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722 if (count >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800723 count = total_size;
724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 if (count + p > total_size)
726 count = total_size - p;
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
729 GFP_KERNEL);
730 if (!buffer)
731 return -ENOMEM;
732
733 src = (u32 __iomem *) (info->screen_base + p);
734
735 if (info->fbops->fb_sync)
736 info->fbops->fb_sync(info);
737
738 while (count) {
739 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
740 dst = buffer;
741 for (i = c >> 2; i--; )
742 *dst++ = fb_readl(src++);
743 if (c & 3) {
744 u8 *dst8 = (u8 *) dst;
745 u8 __iomem *src8 = (u8 __iomem *) src;
746
747 for (i = c & 3; i--;)
748 *dst8++ = fb_readb(src8++);
749
750 src = (u32 __iomem *) src8;
751 }
752
753 if (copy_to_user(buf, buffer, c)) {
754 err = -EFAULT;
755 break;
756 }
757 *ppos += c;
758 buf += c;
759 cnt += c;
760 count -= c;
761 }
762
763 kfree(buffer);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800764
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 return (err) ? err : cnt;
766}
767
768static ssize_t
769fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
770{
771 unsigned long p = *ppos;
Josef Sipekad9a8242006-12-08 02:37:48 -0800772 struct inode *inode = file->f_path.dentry->d_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 int fbidx = iminor(inode);
774 struct fb_info *info = registered_fb[fbidx];
775 u32 *buffer, *src;
776 u32 __iomem *dst;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800777 int c, i, cnt = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778 unsigned long total_size;
779
780 if (!info || !info->screen_base)
781 return -ENODEV;
782
783 if (info->state != FBINFO_STATE_RUNNING)
784 return -EPERM;
785
786 if (info->fbops->fb_write)
Antonino A. Daplas3f9b0882007-05-08 00:39:02 -0700787 return info->fbops->fb_write(info, buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
789 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800790
Linus Torvalds1da177e2005-04-16 15:20:36 -0700791 if (total_size == 0)
792 total_size = info->fix.smem_len;
793
794 if (p > total_size)
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700795 return -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800796
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700797 if (count > total_size) {
798 err = -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800799 count = total_size;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700800 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800801
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700802 if (count + p > total_size) {
803 if (!err)
804 err = -ENOSPC;
805
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800806 count = total_size - p;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700807 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800808
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
810 GFP_KERNEL);
811 if (!buffer)
812 return -ENOMEM;
813
814 dst = (u32 __iomem *) (info->screen_base + p);
815
816 if (info->fbops->fb_sync)
817 info->fbops->fb_sync(info);
818
819 while (count) {
820 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
821 src = buffer;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800822
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 if (copy_from_user(src, buf, c)) {
824 err = -EFAULT;
825 break;
826 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800827
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 for (i = c >> 2; i--; )
829 fb_writel(*src++, dst++);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800830
Linus Torvalds1da177e2005-04-16 15:20:36 -0700831 if (c & 3) {
832 u8 *src8 = (u8 *) src;
833 u8 __iomem *dst8 = (u8 __iomem *) dst;
834
835 for (i = c & 3; i--; )
836 fb_writeb(*src8++, dst8++);
837
838 dst = (u32 __iomem *) dst8;
839 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800840
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 *ppos += c;
842 buf += c;
843 cnt += c;
844 count -= c;
845 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800846
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 kfree(buffer);
848
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700849 return (cnt) ? cnt : err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850}
851
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852int
853fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
854{
Antonino A. Daplas12070692005-12-12 22:17:17 -0800855 struct fb_fix_screeninfo *fix = &info->fix;
Ville Syrjala7572a1e2008-07-23 21:31:28 -0700856 unsigned int yres = info->var.yres;
857 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858
Antonino A. Daplas12070692005-12-12 22:17:17 -0800859 if (var->yoffset > 0) {
860 if (var->vmode & FB_VMODE_YWRAP) {
861 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
862 err = -EINVAL;
863 else
864 yres = 0;
865 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
866 err = -EINVAL;
867 }
868
869 if (var->xoffset > 0 && (!fix->xpanstep ||
870 (var->xoffset % fix->xpanstep)))
871 err = -EINVAL;
872
Ville Syrjala7572a1e2008-07-23 21:31:28 -0700873 if (err || !info->fbops->fb_pan_display ||
Florian Tobias Schandinat99e9e7d2009-09-22 16:47:41 -0700874 var->yoffset > info->var.yres_virtual - yres ||
875 var->xoffset > info->var.xres_virtual - info->var.xres)
Antonino A. Daplas12070692005-12-12 22:17:17 -0800876 return -EINVAL;
877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 if ((err = info->fbops->fb_pan_display(var, info)))
879 return err;
880 info->var.xoffset = var->xoffset;
881 info->var.yoffset = var->yoffset;
882 if (var->vmode & FB_VMODE_YWRAP)
883 info->var.vmode |= FB_VMODE_YWRAP;
884 else
885 info->var.vmode &= ~FB_VMODE_YWRAP;
886 return 0;
887}
888
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700889static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
890 u32 activate)
891{
892 struct fb_event event;
893 struct fb_blit_caps caps, fbcaps;
894 int err = 0;
895
896 memset(&caps, 0, sizeof(caps));
897 memset(&fbcaps, 0, sizeof(fbcaps));
898 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
899 event.info = info;
900 event.data = &caps;
901 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
902 info->fbops->fb_get_caps(info, &fbcaps, var);
903
904 if (((fbcaps.x ^ caps.x) & caps.x) ||
905 ((fbcaps.y ^ caps.y) & caps.y) ||
906 (fbcaps.len < caps.len))
907 err = -EINVAL;
908
909 return err;
910}
911
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912int
913fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
914{
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700915 int flags = info->flags;
916 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
918 if (var->activate & FB_ACTIVATE_INV_MODE) {
919 struct fb_videomode mode1, mode2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920
921 fb_var_to_videomode(&mode1, var);
922 fb_var_to_videomode(&mode2, &info->var);
923 /* make sure we don't delete the videomode of current var */
924 ret = fb_mode_is_equal(&mode1, &mode2);
925
926 if (!ret) {
927 struct fb_event event;
928
929 event.info = info;
930 event.data = &mode1;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700931 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 }
933
934 if (!ret)
935 fb_delete_videomode(&mode1, &info->modelist);
936
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700937
938 ret = (ret) ? -EINVAL : 0;
939 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 }
941
942 if ((var->activate & FB_ACTIVATE_FORCE) ||
943 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
Antonino A. Daplas4941cb72007-05-08 00:39:22 -0700944 u32 activate = var->activate;
945
Linus Torvalds1da177e2005-04-16 15:20:36 -0700946 if (!info->fbops->fb_check_var) {
947 *var = info->var;
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700948 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 }
950
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700951 ret = info->fbops->fb_check_var(var, info);
952
953 if (ret)
954 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700955
956 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
Florian Tobias Schandinat0fcf6ad2009-09-22 16:47:44 -0700957 struct fb_var_screeninfo old_var;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 struct fb_videomode mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700960 if (info->fbops->fb_get_caps) {
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700961 ret = fb_check_caps(info, var, activate);
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700962
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700963 if (ret)
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700964 goto done;
965 }
966
Florian Tobias Schandinat0fcf6ad2009-09-22 16:47:44 -0700967 old_var = info->var;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 info->var = *var;
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700969
Florian Tobias Schandinat0fcf6ad2009-09-22 16:47:44 -0700970 if (info->fbops->fb_set_par) {
971 ret = info->fbops->fb_set_par(info);
972
973 if (ret) {
974 info->var = old_var;
975 printk(KERN_WARNING "detected "
976 "fb_set_par error, "
977 "error code: %d\n", ret);
978 goto done;
979 }
980 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981
982 fb_pan_display(info, &info->var);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 fb_set_cmap(&info->cmap, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 fb_var_to_videomode(&mode, &info->var);
985
986 if (info->modelist.prev && info->modelist.next &&
987 !list_empty(&info->modelist))
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700988 ret = fb_add_videomode(&mode, &info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700990 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 struct fb_event event;
Antonino A. Daplas4941cb72007-05-08 00:39:22 -0700992 int evnt = (activate & FB_ACTIVATE_ALL) ?
Antonino A. Daplas7726e9e2005-09-09 13:04:29 -0700993 FB_EVENT_MODE_CHANGE_ALL :
994 FB_EVENT_MODE_CHANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995
996 info->flags &= ~FBINFO_MISC_USEREVENT;
997 event.info = info;
Eric Miaofaa312d2008-08-29 04:18:43 +0800998 event.data = &mode;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700999 fb_notifier_call_chain(evnt, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 }
1001 }
1002 }
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -07001003
1004 done:
Antonino A. Daplasb1e72232007-05-08 00:39:52 -07001005 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006}
1007
1008int
1009fb_blank(struct fb_info *info, int blank)
1010{
1011 int ret = -EINVAL;
1012
1013 if (blank > FB_BLANK_POWERDOWN)
1014 blank = FB_BLANK_POWERDOWN;
1015
1016 if (info->fbops->fb_blank)
1017 ret = info->fbops->fb_blank(blank, info);
1018
1019 if (!ret) {
1020 struct fb_event event;
1021
1022 event.info = info;
1023 event.data = &blank;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001024 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 }
1026
1027 return ret;
1028}
1029
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001030static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1031 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032{
Alan Coxe5367712008-10-18 20:27:51 -07001033 struct fb_ops *fb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 struct fb_var_screeninfo var;
1035 struct fb_fix_screeninfo fix;
1036 struct fb_con2fbmap con2fb;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001037 struct fb_cmap cmap_from;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 struct fb_cmap_user cmap;
1039 struct fb_event event;
1040 void __user *argp = (void __user *)arg;
Alan Coxe5367712008-10-18 20:27:51 -07001041 long ret = 0;
1042
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 switch (cmd) {
1044 case FBIOGET_VSCREENINFO:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001045 if (!lock_fb_info(info))
1046 return -ENODEV;
1047 var = info->var;
1048 unlock_fb_info(info);
1049
1050 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
Alan Coxe5367712008-10-18 20:27:51 -07001051 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 case FBIOPUT_VSCREENINFO:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001053 if (copy_from_user(&var, argp, sizeof(var)))
1054 return -EFAULT;
1055 if (!lock_fb_info(info))
1056 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 acquire_console_sem();
1058 info->flags |= FBINFO_MISC_USEREVENT;
Alan Coxe5367712008-10-18 20:27:51 -07001059 ret = fb_set_var(info, &var);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 info->flags &= ~FBINFO_MISC_USEREVENT;
1061 release_console_sem();
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001062 unlock_fb_info(info);
1063 if (!ret && copy_to_user(argp, &var, sizeof(var)))
Alan Coxe5367712008-10-18 20:27:51 -07001064 ret = -EFAULT;
1065 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 case FBIOGET_FSCREENINFO:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001067 if (!lock_fb_info(info))
1068 return -ENODEV;
1069 fix = info->fix;
1070 unlock_fb_info(info);
1071
1072 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
Alan Coxe5367712008-10-18 20:27:51 -07001073 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 case FBIOPUTCMAP:
1075 if (copy_from_user(&cmap, argp, sizeof(cmap)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001076 return -EFAULT;
1077 ret = fb_set_user_cmap(&cmap, info);
Alan Coxe5367712008-10-18 20:27:51 -07001078 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079 case FBIOGETCMAP:
1080 if (copy_from_user(&cmap, argp, sizeof(cmap)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001081 return -EFAULT;
1082 if (!lock_fb_info(info))
1083 return -ENODEV;
1084 cmap_from = info->cmap;
1085 unlock_fb_info(info);
1086 ret = fb_cmap_to_user(&cmap_from, &cmap);
Alan Coxe5367712008-10-18 20:27:51 -07001087 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001088 case FBIOPAN_DISPLAY:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001089 if (copy_from_user(&var, argp, sizeof(var)))
1090 return -EFAULT;
1091 if (!lock_fb_info(info))
1092 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 acquire_console_sem();
Alan Coxe5367712008-10-18 20:27:51 -07001094 ret = fb_pan_display(info, &var);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 release_console_sem();
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001096 unlock_fb_info(info);
Alan Coxe5367712008-10-18 20:27:51 -07001097 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001098 return -EFAULT;
Alan Coxe5367712008-10-18 20:27:51 -07001099 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 case FBIO_CURSOR:
Alan Coxe5367712008-10-18 20:27:51 -07001101 ret = -EINVAL;
1102 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 case FBIOGET_CON2FBMAP:
1104 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001105 return -EFAULT;
1106 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1107 return -EINVAL;
1108 con2fb.framebuffer = -1;
1109 event.data = &con2fb;
Andrea Righi513adb52009-04-13 14:39:39 -07001110 if (!lock_fb_info(info))
1111 return -ENODEV;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001112 event.info = info;
1113 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001114 unlock_fb_info(info);
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001115 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
Alan Coxe5367712008-10-18 20:27:51 -07001116 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117 case FBIOPUT_CON2FBMAP:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001118 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1119 return -EFAULT;
1120 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1121 return -EINVAL;
1122 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1123 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001124 if (!registered_fb[con2fb.framebuffer])
Alan Coxe5367712008-10-18 20:27:51 -07001125 request_module("fb%d", con2fb.framebuffer);
1126 if (!registered_fb[con2fb.framebuffer]) {
1127 ret = -EINVAL;
1128 break;
1129 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 event.data = &con2fb;
Andrea Righi513adb52009-04-13 14:39:39 -07001131 if (!lock_fb_info(info))
1132 return -ENODEV;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001133 event.info = info;
Andrea Righi66c1ca02009-03-31 15:25:18 -07001134 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001135 unlock_fb_info(info);
Alan Coxe5367712008-10-18 20:27:51 -07001136 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001137 case FBIOBLANK:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001138 if (!lock_fb_info(info))
1139 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 acquire_console_sem();
1141 info->flags |= FBINFO_MISC_USEREVENT;
Alan Coxe5367712008-10-18 20:27:51 -07001142 ret = fb_blank(info, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001143 info->flags &= ~FBINFO_MISC_USEREVENT;
1144 release_console_sem();
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001145 unlock_fb_info(info);
1146 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 default:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001148 if (!lock_fb_info(info))
1149 return -ENODEV;
1150 fb = info->fbops;
1151 if (fb->fb_ioctl)
Alan Coxe5367712008-10-18 20:27:51 -07001152 ret = fb->fb_ioctl(info, cmd, arg);
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001153 else
1154 ret = -ENOTTY;
1155 unlock_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156 }
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001157 return ret;
1158}
1159
1160static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001161{
1162 struct inode *inode = file->f_path.dentry->d_inode;
1163 int fbidx = iminor(inode);
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001164 struct fb_info *info = registered_fb[fbidx];
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001165
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001166 return do_fb_ioctl(info, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167}
1168
1169#ifdef CONFIG_COMPAT
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001170struct fb_fix_screeninfo32 {
1171 char id[16];
1172 compat_caddr_t smem_start;
1173 u32 smem_len;
1174 u32 type;
1175 u32 type_aux;
1176 u32 visual;
1177 u16 xpanstep;
1178 u16 ypanstep;
1179 u16 ywrapstep;
1180 u32 line_length;
1181 compat_caddr_t mmio_start;
1182 u32 mmio_len;
1183 u32 accel;
1184 u16 reserved[3];
1185};
1186
1187struct fb_cmap32 {
1188 u32 start;
1189 u32 len;
1190 compat_caddr_t red;
1191 compat_caddr_t green;
1192 compat_caddr_t blue;
1193 compat_caddr_t transp;
1194};
1195
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001196static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1197 unsigned long arg)
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001198{
1199 struct fb_cmap_user __user *cmap;
1200 struct fb_cmap32 __user *cmap32;
1201 __u32 data;
1202 int err;
1203
1204 cmap = compat_alloc_user_space(sizeof(*cmap));
1205 cmap32 = compat_ptr(arg);
1206
1207 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1208 return -EFAULT;
1209
1210 if (get_user(data, &cmap32->red) ||
1211 put_user(compat_ptr(data), &cmap->red) ||
1212 get_user(data, &cmap32->green) ||
1213 put_user(compat_ptr(data), &cmap->green) ||
1214 get_user(data, &cmap32->blue) ||
1215 put_user(compat_ptr(data), &cmap->blue) ||
1216 get_user(data, &cmap32->transp) ||
1217 put_user(compat_ptr(data), &cmap->transp))
1218 return -EFAULT;
1219
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001220 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001221
1222 if (!err) {
1223 if (copy_in_user(&cmap32->start,
1224 &cmap->start,
1225 2 * sizeof(__u32)))
1226 err = -EFAULT;
1227 }
1228 return err;
1229}
1230
1231static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1232 struct fb_fix_screeninfo32 __user *fix32)
1233{
1234 __u32 data;
1235 int err;
1236
1237 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1238
1239 data = (__u32) (unsigned long) fix->smem_start;
1240 err |= put_user(data, &fix32->smem_start);
1241
1242 err |= put_user(fix->smem_len, &fix32->smem_len);
1243 err |= put_user(fix->type, &fix32->type);
1244 err |= put_user(fix->type_aux, &fix32->type_aux);
1245 err |= put_user(fix->visual, &fix32->visual);
1246 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1247 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1248 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1249 err |= put_user(fix->line_length, &fix32->line_length);
1250
1251 data = (__u32) (unsigned long) fix->mmio_start;
1252 err |= put_user(data, &fix32->mmio_start);
1253
1254 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1255 err |= put_user(fix->accel, &fix32->accel);
1256 err |= copy_to_user(fix32->reserved, fix->reserved,
1257 sizeof(fix->reserved));
1258
1259 return err;
1260}
1261
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001262static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1263 unsigned long arg)
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001264{
1265 mm_segment_t old_fs;
1266 struct fb_fix_screeninfo fix;
1267 struct fb_fix_screeninfo32 __user *fix32;
1268 int err;
1269
1270 fix32 = compat_ptr(arg);
1271
1272 old_fs = get_fs();
1273 set_fs(KERNEL_DS);
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001274 err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001275 set_fs(old_fs);
1276
1277 if (!err)
1278 err = do_fscreeninfo_to_user(&fix, fix32);
1279
1280 return err;
1281}
1282
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001283static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1284 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285{
Josef Sipekad9a8242006-12-08 02:37:48 -08001286 struct inode *inode = file->f_path.dentry->d_inode;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001287 int fbidx = iminor(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 struct fb_info *info = registered_fb[fbidx];
1289 struct fb_ops *fb = info->fbops;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001290 long ret = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001292 switch(cmd) {
1293 case FBIOGET_VSCREENINFO:
1294 case FBIOPUT_VSCREENINFO:
1295 case FBIOPAN_DISPLAY:
1296 case FBIOGET_CON2FBMAP:
1297 case FBIOPUT_CON2FBMAP:
1298 arg = (unsigned long) compat_ptr(arg);
1299 case FBIOBLANK:
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001300 ret = do_fb_ioctl(info, cmd, arg);
1301 break;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001302
1303 case FBIOGET_FSCREENINFO:
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001304 ret = fb_get_fscreeninfo(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001305 break;
1306
1307 case FBIOGETCMAP:
1308 case FBIOPUTCMAP:
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001309 ret = fb_getput_cmap(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001310 break;
1311
1312 default:
1313 if (fb->fb_compat_ioctl)
Christoph Hellwig67a66802006-01-14 13:21:25 -08001314 ret = fb->fb_compat_ioctl(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001315 break;
1316 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001317 return ret;
1318}
1319#endif
1320
Antonino A. Daplas10eb2652007-07-17 04:05:27 -07001321static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001322fb_mmap(struct file *file, struct vm_area_struct * vma)
1323{
Josef Sipekad9a8242006-12-08 02:37:48 -08001324 int fbidx = iminor(file->f_path.dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001325 struct fb_info *info = registered_fb[fbidx];
1326 struct fb_ops *fb = info->fbops;
1327 unsigned long off;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 unsigned long start;
1329 u32 len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330
1331 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1332 return -EINVAL;
1333 off = vma->vm_pgoff << PAGE_SHIFT;
1334 if (!fb)
1335 return -ENODEV;
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001336 mutex_lock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 if (fb->fb_mmap) {
1338 int res;
Christoph Hellwig216d5262006-01-14 13:21:25 -08001339 res = fb->fb_mmap(info, vma);
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001340 mutex_unlock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001341 return res;
1342 }
1343
Linus Torvalds1da177e2005-04-16 15:20:36 -07001344 /* frame buffer memory */
1345 start = info->fix.smem_start;
1346 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1347 if (off >= len) {
1348 /* memory mapped io */
1349 off -= len;
1350 if (info->var.accel_flags) {
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001351 mutex_unlock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 return -EINVAL;
1353 }
1354 start = info->fix.mmio_start;
1355 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1356 }
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001357 mutex_unlock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358 start &= PAGE_MASK;
1359 if ((vma->vm_end - vma->vm_start + off) > len)
1360 return -EINVAL;
1361 off += start;
1362 vma->vm_pgoff = off >> PAGE_SHIFT;
1363 /* This is an IO map - tell maydump to skip this VMA */
1364 vma->vm_flags |= VM_IO | VM_RESERVED;
Antonino A. Daplas10eb2652007-07-17 04:05:27 -07001365 fb_pgprotect(file, vma, off);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1367 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1368 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370}
1371
1372static int
1373fb_open(struct inode *inode, struct file *file)
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001374__acquires(&info->lock)
1375__releases(&info->lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376{
1377 int fbidx = iminor(inode);
1378 struct fb_info *info;
1379 int res = 0;
1380
1381 if (fbidx >= FB_MAX)
1382 return -ENODEV;
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001383 info = registered_fb[fbidx];
1384 if (!info)
Johannes Berga65e5d72008-07-09 10:28:38 +02001385 request_module("fb%d", fbidx);
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001386 info = registered_fb[fbidx];
1387 if (!info)
1388 return -ENODEV;
1389 mutex_lock(&info->lock);
Jonathan Corbetfc7f6872008-05-15 16:30:36 -06001390 if (!try_module_get(info->fbops->owner)) {
1391 res = -ENODEV;
1392 goto out;
1393 }
Thomas Koellercae8a122006-01-09 20:53:48 -08001394 file->private_data = info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 if (info->fbops->fb_open) {
1396 res = info->fbops->fb_open(info,1);
1397 if (res)
1398 module_put(info->fbops->owner);
1399 }
Ian Campbelld8474712008-08-20 14:09:23 -07001400#ifdef CONFIG_FB_DEFERRED_IO
1401 if (info->fbdefio)
1402 fb_deferred_io_open(info, inode, file);
1403#endif
Jonathan Corbetfc7f6872008-05-15 16:30:36 -06001404out:
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001405 mutex_unlock(&info->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 return res;
1407}
1408
1409static int
1410fb_release(struct inode *inode, struct file *file)
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001411__acquires(&info->lock)
1412__releases(&info->lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413{
Thomas Koellercae8a122006-01-09 20:53:48 -08001414 struct fb_info * const info = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001415
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001416 mutex_lock(&info->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417 if (info->fbops->fb_release)
1418 info->fbops->fb_release(info,1);
1419 module_put(info->fbops->owner);
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001420 mutex_unlock(&info->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001421 return 0;
1422}
1423
Helge Deller0128bee2006-12-08 02:40:29 -08001424static const struct file_operations fb_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001425 .owner = THIS_MODULE,
1426 .read = fb_read,
1427 .write = fb_write,
Alan Coxe5367712008-10-18 20:27:51 -07001428 .unlocked_ioctl = fb_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429#ifdef CONFIG_COMPAT
1430 .compat_ioctl = fb_compat_ioctl,
1431#endif
1432 .mmap = fb_mmap,
1433 .open = fb_open,
1434 .release = fb_release,
1435#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1436 .get_unmapped_area = get_fb_unmapped_area,
1437#endif
Paul Mundt5e841b82007-05-08 00:37:41 -07001438#ifdef CONFIG_FB_DEFERRED_IO
1439 .fsync = fb_deferred_io_fsync,
1440#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001441};
1442
Antonino A. Daplas9a179172006-06-26 00:27:05 -07001443struct class *fb_class;
1444EXPORT_SYMBOL(fb_class);
Anton Vorontsove4c690e2008-04-28 02:14:49 -07001445
1446static int fb_check_foreignness(struct fb_info *fi)
1447{
1448 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1449
1450 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1451
1452#ifdef __BIG_ENDIAN
1453 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1454#else
1455 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1456#endif /* __BIG_ENDIAN */
1457
1458 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1459 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1460 "support this framebuffer\n", fi->fix.id);
1461 return -ENOSYS;
1462 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1463 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1464 "support this framebuffer\n", fi->fix.id);
1465 return -ENOSYS;
1466 }
1467
1468 return 0;
1469}
1470
Dave Airlie4410f392009-06-16 15:34:38 -07001471static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
1472{
1473 /* is the generic aperture base the same as the HW one */
1474 if (gen->aperture_base == hw->aperture_base)
1475 return true;
1476 /* is the generic aperture base inside the hw base->hw base+size */
1477 if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size)
1478 return true;
1479 return false;
1480}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001481/**
1482 * register_framebuffer - registers a frame buffer device
1483 * @fb_info: frame buffer info structure
1484 *
1485 * Registers a frame buffer device @fb_info.
1486 *
1487 * Returns negative errno on error, or zero for success.
1488 *
1489 */
1490
1491int
1492register_framebuffer(struct fb_info *fb_info)
1493{
1494 int i;
1495 struct fb_event event;
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001496 struct fb_videomode mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497
1498 if (num_registered_fb == FB_MAX)
1499 return -ENXIO;
Anton Vorontsove4c690e2008-04-28 02:14:49 -07001500
1501 if (fb_check_foreignness(fb_info))
1502 return -ENOSYS;
1503
Dave Airlie4410f392009-06-16 15:34:38 -07001504 /* check all firmware fbs and kick off if the base addr overlaps */
1505 for (i = 0 ; i < FB_MAX; i++) {
1506 if (!registered_fb[i])
1507 continue;
1508
1509 if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) {
1510 if (fb_do_apertures_overlap(registered_fb[i], fb_info)) {
1511 printk(KERN_ERR "fb: conflicting fb hw usage "
1512 "%s vs %s - removing generic driver\n",
1513 fb_info->fix.id,
1514 registered_fb[i]->fix.id);
1515 unregister_framebuffer(registered_fb[i]);
1516 break;
1517 }
1518 }
1519 }
1520
Linus Torvalds1da177e2005-04-16 15:20:36 -07001521 num_registered_fb++;
1522 for (i = 0 ; i < FB_MAX; i++)
1523 if (!registered_fb[i])
1524 break;
1525 fb_info->node = i;
Linus Torvalds6c968952009-07-08 09:20:11 -07001526 mutex_init(&fb_info->lock);
1527 mutex_init(&fb_info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528
Greg Kroah-Hartman77997aa2008-07-21 20:03:34 -07001529 fb_info->dev = device_create(fb_class, fb_info->device,
1530 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -07001531 if (IS_ERR(fb_info->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001532 /* Not fatal */
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -07001533 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1534 fb_info->dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001535 } else
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -07001536 fb_init_device(fb_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537
1538 if (fb_info->pixmap.addr == NULL) {
1539 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1540 if (fb_info->pixmap.addr) {
1541 fb_info->pixmap.size = FBPIXMAPSIZE;
1542 fb_info->pixmap.buf_align = 1;
1543 fb_info->pixmap.scan_align = 1;
James Simmons58a60642005-06-21 17:17:08 -07001544 fb_info->pixmap.access_align = 32;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001545 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1546 }
1547 }
1548 fb_info->pixmap.offset = 0;
1549
Antonino A. Daplasbf26ad72007-05-08 00:39:09 -07001550 if (!fb_info->pixmap.blit_x)
1551 fb_info->pixmap.blit_x = ~(u32)0;
1552
1553 if (!fb_info->pixmap.blit_y)
1554 fb_info->pixmap.blit_y = ~(u32)0;
1555
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001556 if (!fb_info->modelist.prev || !fb_info->modelist.next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 INIT_LIST_HEAD(&fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001559 fb_var_to_videomode(&mode, &fb_info->var);
1560 fb_add_videomode(&mode, &fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001561 registered_fb[i] = fb_info;
1562
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563 event.info = fb_info;
Andrea Righi513adb52009-04-13 14:39:39 -07001564 if (!lock_fb_info(fb_info))
1565 return -ENODEV;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001566 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001567 unlock_fb_info(fb_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001568 return 0;
1569}
1570
1571
1572/**
1573 * unregister_framebuffer - releases a frame buffer device
1574 * @fb_info: frame buffer info structure
1575 *
1576 * Unregisters a frame buffer device @fb_info.
1577 *
1578 * Returns negative errno on error, or zero for success.
1579 *
Jesse Barnescfafca82007-07-17 04:05:33 -07001580 * This function will also notify the framebuffer console
1581 * to release the driver.
1582 *
1583 * This is meant to be called within a driver's module_exit()
1584 * function. If this is called outside module_exit(), ensure
1585 * that the driver implements fb_open() and fb_release() to
1586 * check that no processes are using the device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 */
1588
1589int
1590unregister_framebuffer(struct fb_info *fb_info)
1591{
Antonino A. Daplase614b182006-06-26 00:27:09 -07001592 struct fb_event event;
Jesse Barnescfafca82007-07-17 04:05:33 -07001593 int i, ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594
1595 i = fb_info->node;
Jesse Barnescfafca82007-07-17 04:05:33 -07001596 if (!registered_fb[i]) {
1597 ret = -EINVAL;
1598 goto done;
1599 }
1600
Andrea Righi513adb52009-04-13 14:39:39 -07001601
1602 if (!lock_fb_info(fb_info))
1603 return -ENODEV;
Jesse Barnescfafca82007-07-17 04:05:33 -07001604 event.info = fb_info;
1605 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001606 unlock_fb_info(fb_info);
Jesse Barnescfafca82007-07-17 04:05:33 -07001607
1608 if (ret) {
1609 ret = -EINVAL;
1610 goto done;
1611 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001612
Antonino A. Daplase614b182006-06-26 00:27:09 -07001613 if (fb_info->pixmap.addr &&
1614 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615 kfree(fb_info->pixmap.addr);
1616 fb_destroy_modelist(&fb_info->modelist);
1617 registered_fb[i]=NULL;
1618 num_registered_fb--;
Greg Kroah-Hartman78cde082006-09-14 07:30:59 -07001619 fb_cleanup_device(fb_info);
1620 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
Antonino A. Daplase614b182006-06-26 00:27:09 -07001621 event.info = fb_info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001622 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
Dave Airlie4410f392009-06-16 15:34:38 -07001623
1624 /* this may free fb info */
1625 if (fb_info->fbops->fb_destroy)
1626 fb_info->fbops->fb_destroy(fb_info);
Jesse Barnescfafca82007-07-17 04:05:33 -07001627done:
1628 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001629}
1630
1631/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 * fb_set_suspend - low level driver signals suspend
1633 * @info: framebuffer affected
1634 * @state: 0 = resuming, !=0 = suspending
1635 *
1636 * This is meant to be used by low level drivers to
1637 * signal suspend/resume to the core & clients.
1638 * It must be called with the console semaphore held
1639 */
1640void fb_set_suspend(struct fb_info *info, int state)
1641{
1642 struct fb_event event;
1643
Andrea Righi513adb52009-04-13 14:39:39 -07001644 if (!lock_fb_info(info))
1645 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001646 event.info = info;
1647 if (state) {
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001648 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649 info->state = FBINFO_STATE_SUSPENDED;
1650 } else {
1651 info->state = FBINFO_STATE_RUNNING;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001652 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 }
Andrea Righi513adb52009-04-13 14:39:39 -07001654 unlock_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655}
1656
1657/**
1658 * fbmem_init - init frame buffer subsystem
1659 *
1660 * Initialize the frame buffer subsystem.
1661 *
1662 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1663 *
1664 */
1665
1666static int __init
1667fbmem_init(void)
1668{
Alexey Dobriyan0aa16342008-04-28 02:15:42 -07001669 proc_create("fb", 0, NULL, &fb_proc_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670
Linus Torvalds1da177e2005-04-16 15:20:36 -07001671 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1672 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1673
gregkh@suse.de56b22932005-03-23 10:01:41 -08001674 fb_class = class_create(THIS_MODULE, "graphics");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675 if (IS_ERR(fb_class)) {
1676 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1677 fb_class = NULL;
1678 }
1679 return 0;
1680}
1681
1682#ifdef MODULE
1683module_init(fbmem_init);
1684static void __exit
1685fbmem_exit(void)
1686{
Alexey Dobriyanc43f89c2008-04-15 14:34:33 -07001687 remove_proc_entry("fb", NULL);
gregkh@suse.de56b22932005-03-23 10:01:41 -08001688 class_destroy(fb_class);
Jon Smirl5a340cc2005-07-27 11:46:04 -07001689 unregister_chrdev(FB_MAJOR, "fb");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690}
1691
1692module_exit(fbmem_exit);
1693MODULE_LICENSE("GPL");
1694MODULE_DESCRIPTION("Framebuffer base");
1695#else
1696subsys_initcall(fbmem_init);
1697#endif
1698
1699int fb_new_modelist(struct fb_info *info)
1700{
1701 struct fb_event event;
1702 struct fb_var_screeninfo var = info->var;
1703 struct list_head *pos, *n;
1704 struct fb_modelist *modelist;
1705 struct fb_videomode *m, mode;
1706 int err = 1;
1707
1708 list_for_each_safe(pos, n, &info->modelist) {
1709 modelist = list_entry(pos, struct fb_modelist, list);
1710 m = &modelist->mode;
1711 fb_videomode_to_var(&var, m);
1712 var.activate = FB_ACTIVATE_TEST;
1713 err = fb_set_var(info, &var);
1714 fb_var_to_videomode(&mode, &var);
1715 if (err || !fb_mode_is_equal(m, &mode)) {
1716 list_del(pos);
1717 kfree(pos);
1718 }
1719 }
1720
1721 err = 1;
1722
1723 if (!list_empty(&info->modelist)) {
Andrea Righi513adb52009-04-13 14:39:39 -07001724 if (!lock_fb_info(info))
1725 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726 event.info = info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001727 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001728 unlock_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 }
1730
1731 return err;
1732}
1733
Helge Deller0128bee2006-12-08 02:40:29 -08001734static char *video_options[FB_MAX] __read_mostly;
1735static int ofonly __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001736
1737/**
1738 * fb_get_options - get kernel boot parameters
1739 * @name: framebuffer name as it would appear in
1740 * the boot parameter line
1741 * (video=<name>:<options>)
1742 * @option: the option will be stored here
1743 *
1744 * NOTE: Needed to maintain backwards compatibility
1745 */
1746int fb_get_options(char *name, char **option)
1747{
1748 char *opt, *options = NULL;
1749 int opt_len, retval = 0;
1750 int name_len = strlen(name), i;
1751
1752 if (name_len && ofonly && strncmp(name, "offb", 4))
1753 retval = 1;
1754
1755 if (name_len && !retval) {
1756 for (i = 0; i < FB_MAX; i++) {
1757 if (video_options[i] == NULL)
1758 continue;
1759 opt_len = strlen(video_options[i]);
1760 if (!opt_len)
1761 continue;
1762 opt = video_options[i];
1763 if (!strncmp(name, opt, name_len) &&
1764 opt[name_len] == ':')
1765 options = opt + name_len + 1;
1766 }
1767 }
1768 if (options && !strncmp(options, "off", 3))
1769 retval = 1;
1770
1771 if (option)
1772 *option = options;
1773
1774 return retval;
1775}
1776
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001777#ifndef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001778/**
1779 * video_setup - process command line options
1780 * @options: string of options
1781 *
1782 * Process command line options for frame buffer subsystem.
1783 *
1784 * NOTE: This function is a __setup and __init function.
1785 * It only stores the options. Drivers have to call
1786 * fb_get_options() as necessary.
1787 *
1788 * Returns zero.
1789 *
1790 */
Adrian Bunk75c96f82005-05-05 16:16:09 -07001791static int __init video_setup(char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001792{
1793 int i, global = 0;
1794
1795 if (!options || !*options)
1796 global = 1;
1797
1798 if (!global && !strncmp(options, "ofonly", 6)) {
1799 ofonly = 1;
1800 global = 1;
1801 }
1802
Dave Airlief8033032009-09-16 20:45:09 +10001803 if (!global && !strchr(options, ':')) {
Geert Uytterhoeven9a054fb2007-10-16 01:29:51 -07001804 fb_mode_option = options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001805 global = 1;
1806 }
1807
1808 if (!global) {
1809 for (i = 0; i < FB_MAX; i++) {
1810 if (video_options[i] == NULL) {
1811 video_options[i] = options;
1812 break;
1813 }
1814
1815 }
1816 }
1817
OGAWA Hirofumi9b410462006-03-31 02:30:33 -08001818 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001819}
1820__setup("video=", video_setup);
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001821#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822
1823 /*
1824 * Visible symbols for modules
1825 */
1826
1827EXPORT_SYMBOL(register_framebuffer);
1828EXPORT_SYMBOL(unregister_framebuffer);
1829EXPORT_SYMBOL(num_registered_fb);
1830EXPORT_SYMBOL(registered_fb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831EXPORT_SYMBOL(fb_show_logo);
1832EXPORT_SYMBOL(fb_set_var);
1833EXPORT_SYMBOL(fb_blank);
1834EXPORT_SYMBOL(fb_pan_display);
1835EXPORT_SYMBOL(fb_get_buffer_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001836EXPORT_SYMBOL(fb_set_suspend);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001837EXPORT_SYMBOL(fb_get_options);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001838
1839MODULE_LICENSE("GPL");