blob: 3ff0105a496a592cc9c1136c585efc463aa9de49 [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
Linus Torvalds698b3682011-05-11 14:49:36 -070045static DEFINE_MUTEX(registration_lock);
Helge Deller0128bee2006-12-08 02:40:29 -080046struct fb_info *registered_fb[FB_MAX] __read_mostly;
47int num_registered_fb __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048
Linus Torvalds698b3682011-05-11 14:49:36 -070049static struct fb_info *get_fb_info(unsigned int idx)
50{
51 struct fb_info *fb_info;
52
53 if (idx >= FB_MAX)
54 return ERR_PTR(-ENODEV);
55
56 mutex_lock(&registration_lock);
57 fb_info = registered_fb[idx];
58 if (fb_info)
59 atomic_inc(&fb_info->count);
60 mutex_unlock(&registration_lock);
61
62 return fb_info;
63}
64
65static void put_fb_info(struct fb_info *fb_info)
66{
67 if (!atomic_dec_and_test(&fb_info->count))
68 return;
69 if (fb_info->fbops->fb_destroy)
70 fb_info->fbops->fb_destroy(fb_info);
71}
72
Andrew Morton6a7f2822009-03-31 15:25:19 -070073int lock_fb_info(struct fb_info *info)
74{
75 mutex_lock(&info->lock);
76 if (!info->fbops) {
77 mutex_unlock(&info->lock);
78 return 0;
79 }
80 return 1;
81}
82EXPORT_SYMBOL(lock_fb_info);
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084/*
85 * Helpers
86 */
87
Antonino A. Daplasb8c90942005-09-09 13:04:37 -070088int fb_get_color_depth(struct fb_var_screeninfo *var,
89 struct fb_fix_screeninfo *fix)
Linus Torvalds1da177e2005-04-16 15:20:36 -070090{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -070091 int depth = 0;
92
93 if (fix->visual == FB_VISUAL_MONO01 ||
94 fix->visual == FB_VISUAL_MONO10)
95 depth = 1;
96 else {
97 if (var->green.length == var->blue.length &&
98 var->green.length == var->red.length &&
99 var->green.offset == var->blue.offset &&
100 var->green.offset == var->red.offset)
101 depth = var->green.length;
102 else
103 depth = var->green.length + var->red.length +
104 var->blue.length;
105 }
106
107 return depth;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108}
109EXPORT_SYMBOL(fb_get_color_depth);
110
111/*
James Simmonsf5a99512005-06-21 17:16:58 -0700112 * Data padding functions.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 */
James Simmonsf1ab5da2005-06-21 17:17:07 -0700114void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115{
Antonino A. Daplas829e79b2005-09-09 13:10:04 -0700116 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117}
James Simmonsf1ab5da2005-06-21 17:17:07 -0700118EXPORT_SYMBOL(fb_pad_aligned_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
James Simmonsf1ab5da2005-06-21 17:17:07 -0700120void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
121 u32 shift_high, u32 shift_low, u32 mod)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
123 u8 mask = (u8) (0xfff << shift_high), tmp;
124 int i, j;
125
126 for (i = height; i--; ) {
127 for (j = 0; j < idx; j++) {
128 tmp = dst[j];
129 tmp &= mask;
130 tmp |= *src >> shift_low;
131 dst[j] = tmp;
132 tmp = *src << shift_high;
133 dst[j+1] = tmp;
134 src++;
135 }
136 tmp = dst[idx];
137 tmp &= mask;
138 tmp |= *src >> shift_low;
139 dst[idx] = tmp;
140 if (shift_high < mod) {
141 tmp = *src << shift_high;
142 dst[idx+1] = tmp;
143 }
144 src++;
145 dst += d_pitch;
146 }
147}
James Simmonsf1ab5da2005-06-21 17:17:07 -0700148EXPORT_SYMBOL(fb_pad_unaligned_buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
150/*
151 * we need to lock this section since fb_cursor
152 * may use fb_imageblit()
153 */
154char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
155{
156 u32 align = buf->buf_align - 1, offset;
157 char *addr = buf->addr;
158
159 /* If IO mapped, we need to sync before access, no sharing of
160 * the pixmap is done
161 */
162 if (buf->flags & FB_PIXMAP_IO) {
163 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
164 info->fbops->fb_sync(info);
165 return addr;
166 }
167
168 /* See if we fit in the remaining pixmap space */
169 offset = buf->offset + align;
170 offset &= ~align;
171 if (offset + size > buf->size) {
172 /* We do not fit. In order to be able to re-use the buffer,
173 * we must ensure no asynchronous DMA'ing or whatever operation
174 * is in progress, we sync for that.
175 */
176 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
177 info->fbops->fb_sync(info);
178 offset = 0;
179 }
180 buf->offset = offset + size;
181 addr += offset;
182
183 return addr;
184}
185
186#ifdef CONFIG_LOGO
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188static inline unsigned safe_shift(unsigned d, int n)
189{
190 return n < 0 ? d >> -n : d << n;
191}
192
193static void fb_set_logocmap(struct fb_info *info,
194 const struct linux_logo *logo)
195{
196 struct fb_cmap palette_cmap;
197 u16 palette_green[16];
198 u16 palette_blue[16];
199 u16 palette_red[16];
200 int i, j, n;
201 const unsigned char *clut = logo->clut;
202
203 palette_cmap.start = 0;
204 palette_cmap.len = 16;
205 palette_cmap.red = palette_red;
206 palette_cmap.green = palette_green;
207 palette_cmap.blue = palette_blue;
208 palette_cmap.transp = NULL;
209
210 for (i = 0; i < logo->clutsize; i += n) {
211 n = logo->clutsize - i;
212 /* palette_cmap provides space for only 16 colors at once */
213 if (n > 16)
214 n = 16;
215 palette_cmap.start = 32 + i;
216 palette_cmap.len = n;
217 for (j = 0; j < n; ++j) {
218 palette_cmap.red[j] = clut[0] << 8 | clut[0];
219 palette_cmap.green[j] = clut[1] << 8 | clut[1];
220 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
221 clut += 3;
222 }
223 fb_set_cmap(&palette_cmap, info);
224 }
225}
226
227static void fb_set_logo_truepalette(struct fb_info *info,
228 const struct linux_logo *logo,
229 u32 *palette)
230{
Helge Deller0128bee2006-12-08 02:40:29 -0800231 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 unsigned char redmask, greenmask, bluemask;
233 int redshift, greenshift, blueshift;
234 int i;
235 const unsigned char *clut = logo->clut;
236
237 /*
238 * We have to create a temporary palette since console palette is only
239 * 16 colors long.
240 */
241 /* Bug: Doesn't obey msb_right ... (who needs that?) */
242 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
243 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
244 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
245 redshift = info->var.red.offset - (8 - info->var.red.length);
246 greenshift = info->var.green.offset - (8 - info->var.green.length);
247 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
248
249 for ( i = 0; i < logo->clutsize; i++) {
250 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
251 safe_shift((clut[1] & greenmask), greenshift) |
252 safe_shift((clut[2] & bluemask), blueshift));
253 clut += 3;
254 }
255}
256
257static void fb_set_logo_directpalette(struct fb_info *info,
258 const struct linux_logo *logo,
259 u32 *palette)
260{
261 int redshift, greenshift, blueshift;
262 int i;
263
264 redshift = info->var.red.offset;
265 greenshift = info->var.green.offset;
266 blueshift = info->var.blue.offset;
267
Clemens Ladischcf7ee552008-11-19 15:36:10 -0800268 for (i = 32; i < 32 + logo->clutsize; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 palette[i] = i << redshift | i << greenshift | i << blueshift;
270}
271
272static void fb_set_logo(struct fb_info *info,
273 const struct linux_logo *logo, u8 *dst,
274 int depth)
275{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700276 int i, j, k;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 const u8 *src = logo->data;
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700278 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
279 u8 fg = 1, d;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
Antonino A. Daplas1692b372007-07-31 00:37:36 -0700281 switch (fb_get_color_depth(&info->var, &info->fix)) {
282 case 1:
283 fg = 1;
284 break;
285 case 2:
286 fg = 3;
287 break;
288 default:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 fg = 7;
Antonino A. Daplas1692b372007-07-31 00:37:36 -0700290 break;
291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700293 if (info->fix.visual == FB_VISUAL_MONO01 ||
294 info->fix.visual == FB_VISUAL_MONO10)
295 fg = ~((u8) (0xfff << info->var.green.length));
296
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 switch (depth) {
298 case 4:
299 for (i = 0; i < logo->height; i++)
300 for (j = 0; j < logo->width; src++) {
301 *dst++ = *src >> 4;
302 j++;
303 if (j < logo->width) {
304 *dst++ = *src & 0x0f;
305 j++;
306 }
307 }
308 break;
309 case 1:
310 for (i = 0; i < logo->height; i++) {
311 for (j = 0; j < logo->width; src++) {
312 d = *src ^ xor;
313 for (k = 7; k >= 0; k--) {
314 *dst++ = ((d >> k) & 1) ? fg : 0;
315 j++;
316 }
317 }
318 }
319 break;
320 }
321}
322
323/*
324 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
325 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
326 * the visual format and color depth of the framebuffer, the DAC, the
327 * pseudo_palette, and the logo data will be adjusted accordingly.
328 *
329 * Case 1 - linux_logo_clut224:
330 * Color exceeds the number of console colors (16), thus we set the hardware DAC
331 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
332 *
333 * For visuals that require color info from the pseudo_palette, we also construct
334 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
335 * will be set.
336 *
337 * Case 2 - linux_logo_vga16:
338 * The number of colors just matches the console colors, thus there is no need
339 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
340 * each byte contains color information for two pixels (upper and lower nibble).
341 * To be consistent with fb_imageblit() usage, we therefore separate the two
342 * nibbles into separate bytes. The "depth" flag will be set to 4.
343 *
344 * Case 3 - linux_logo_mono:
345 * This is similar with Case 2. Each byte contains information for 8 pixels.
346 * We isolate each bit and expand each into a byte. The "depth" flag will
347 * be set to 1.
348 */
349static struct logo_data {
350 int depth;
351 int needs_directpalette;
352 int needs_truepalette;
353 int needs_cmapreset;
354 const struct linux_logo *logo;
Helge Deller0128bee2006-12-08 02:40:29 -0800355} fb_logo __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800357static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
358{
359 u32 size = width * height, i;
360
361 out += size - 1;
362
363 for (i = size; i--; )
364 *out-- = *in++;
365}
366
367static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
368{
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700369 int i, j, h = height - 1;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800370
371 for (i = 0; i < height; i++)
372 for (j = 0; j < width; j++)
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700373 out[height * j + h - i] = *in++;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800374}
375
376static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
377{
378 int i, j, w = width - 1;
379
380 for (i = 0; i < height; i++)
381 for (j = 0; j < width; j++)
382 out[height * (w - j) + i] = *in++;
383}
384
385static void fb_rotate_logo(struct fb_info *info, u8 *dst,
386 struct fb_image *image, int rotate)
387{
388 u32 tmp;
389
390 if (rotate == FB_ROTATE_UD) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800391 fb_rotate_logo_ud(image->data, dst, image->width,
392 image->height);
Geert Uytterhoevenabed5d12007-05-08 00:37:57 -0700393 image->dx = info->var.xres - image->width - image->dx;
394 image->dy = info->var.yres - image->height - image->dy;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800395 } else if (rotate == FB_ROTATE_CW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800396 fb_rotate_logo_cw(image->data, dst, image->width,
397 image->height);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800398 tmp = image->width;
399 image->width = image->height;
400 image->height = tmp;
Geert Uytterhoevenabed5d12007-05-08 00:37:57 -0700401 tmp = image->dy;
402 image->dy = image->dx;
403 image->dx = info->var.xres - image->width - tmp;
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700404 } else if (rotate == FB_ROTATE_CCW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800405 fb_rotate_logo_ccw(image->data, dst, image->width,
406 image->height);
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700407 tmp = image->width;
408 image->width = image->height;
409 image->height = tmp;
Geert Uytterhoevenabed5d12007-05-08 00:37:57 -0700410 tmp = image->dx;
411 image->dx = image->dy;
412 image->dy = info->var.yres - image->height - tmp;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800413 }
414
415 image->data = dst;
416}
417
418static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700419 int rotate, unsigned int num)
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800420{
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700421 unsigned int x;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800422
423 if (rotate == FB_ROTATE_UR) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700424 for (x = 0;
425 x < num && image->dx + image->width <= info->var.xres;
426 x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800427 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700428 image->dx += image->width + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800429 }
430 } else if (rotate == FB_ROTATE_UD) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700431 for (x = 0; x < num && image->dx >= 0; x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800432 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700433 image->dx -= image->width + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800434 }
435 } else if (rotate == FB_ROTATE_CW) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700436 for (x = 0;
437 x < num && image->dy + image->height <= info->var.yres;
438 x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800439 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700440 image->dy += image->height + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800441 }
442 } else if (rotate == FB_ROTATE_CCW) {
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700443 for (x = 0; x < num && image->dy >= 0; x++) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800444 info->fbops->fb_imageblit(info, image);
Geert Uytterhoeven448d4792007-05-08 00:37:56 -0700445 image->dy -= image->height + 8;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800446 }
447 }
448}
449
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700450static int fb_show_logo_line(struct fb_info *info, int rotate,
451 const struct linux_logo *logo, int y,
452 unsigned int n)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453{
454 u32 *palette = NULL, *saved_pseudo_palette = NULL;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800455 unsigned char *logo_new = NULL, *logo_rotate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 struct fb_image image;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458 /* Return if the frame buffer is not mapped or suspended */
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700459 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
Antonino A. Daplas70802c62007-05-08 00:38:14 -0700460 info->flags & FBINFO_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 return 0;
462
463 image.depth = 8;
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700464 image.data = logo->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
466 if (fb_logo.needs_cmapreset)
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700467 fb_set_logocmap(info, logo);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700469 if (fb_logo.needs_truepalette ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 fb_logo.needs_directpalette) {
471 palette = kmalloc(256 * 4, GFP_KERNEL);
472 if (palette == NULL)
473 return 0;
474
475 if (fb_logo.needs_truepalette)
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700476 fb_set_logo_truepalette(info, logo, palette);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 else
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700478 fb_set_logo_directpalette(info, logo, palette);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
480 saved_pseudo_palette = info->pseudo_palette;
481 info->pseudo_palette = palette;
482 }
483
484 if (fb_logo.depth <= 4) {
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700485 logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 if (logo_new == NULL) {
487 kfree(palette);
488 if (saved_pseudo_palette)
489 info->pseudo_palette = saved_pseudo_palette;
490 return 0;
491 }
492 image.data = logo_new;
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700493 fb_set_logo(info, logo, logo_new, fb_logo.depth);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 }
495
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800496 image.dx = 0;
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700497 image.dy = y;
498 image.width = logo->width;
499 image.height = logo->height;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800501 if (rotate) {
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700502 logo_rotate = kmalloc(logo->width *
503 logo->height, GFP_KERNEL);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800504 if (logo_rotate)
505 fb_rotate_logo(info, logo_rotate, &image, rotate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 }
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800507
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700508 fb_do_show_logo(info, &image, rotate, n);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 kfree(palette);
511 if (saved_pseudo_palette != NULL)
512 info->pseudo_palette = saved_pseudo_palette;
513 kfree(logo_new);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800514 kfree(logo_rotate);
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700515 return logo->height;
516}
517
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700518
519#ifdef CONFIG_FB_LOGO_EXTRA
520
521#define FB_LOGO_EX_NUM_MAX 10
522static struct logo_data_extra {
523 const struct linux_logo *logo;
524 unsigned int n;
525} fb_logo_ex[FB_LOGO_EX_NUM_MAX];
526static unsigned int fb_logo_ex_num;
527
528void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
529{
530 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
531 return;
532
533 fb_logo_ex[fb_logo_ex_num].logo = logo;
534 fb_logo_ex[fb_logo_ex_num].n = n;
535 fb_logo_ex_num++;
536}
537
538static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
539 unsigned int yres)
540{
541 unsigned int i;
542
543 /* FIXME: logo_ex supports only truecolor fb. */
544 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
545 fb_logo_ex_num = 0;
546
547 for (i = 0; i < fb_logo_ex_num; i++) {
Geert Uytterhoeven4fb6de22009-01-06 14:42:37 -0800548 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
549 fb_logo_ex[i].logo = NULL;
550 continue;
551 }
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700552 height += fb_logo_ex[i].logo->height;
553 if (height > yres) {
554 height -= fb_logo_ex[i].logo->height;
555 fb_logo_ex_num = i;
556 break;
557 }
558 }
559 return height;
560}
561
562static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
563{
564 unsigned int i;
565
566 for (i = 0; i < fb_logo_ex_num; i++)
567 y += fb_show_logo_line(info, rotate,
568 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
569
570 return y;
571}
572
573#else /* !CONFIG_FB_LOGO_EXTRA */
574
575static inline int fb_prepare_extra_logos(struct fb_info *info,
576 unsigned int height,
577 unsigned int yres)
578{
579 return height;
580}
581
582static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
583{
584 return y;
585}
586
587#endif /* CONFIG_FB_LOGO_EXTRA */
588
589
590int fb_prepare_logo(struct fb_info *info, int rotate)
591{
592 int depth = fb_get_color_depth(&info->var, &info->fix);
593 unsigned int yres;
594
595 memset(&fb_logo, 0, sizeof(struct logo_data));
596
597 if (info->flags & FBINFO_MISC_TILEBLITTING ||
598 info->flags & FBINFO_MODULE)
599 return 0;
600
601 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
602 depth = info->var.blue.length;
603 if (info->var.red.length < depth)
604 depth = info->var.red.length;
605 if (info->var.green.length < depth)
606 depth = info->var.green.length;
607 }
608
609 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
610 /* assume console colormap */
611 depth = 4;
612 }
613
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700614 /* Return if no suitable logo was found */
615 fb_logo.logo = fb_find_logo(depth);
616
617 if (!fb_logo.logo) {
618 return 0;
619 }
620
621 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
622 yres = info->var.yres;
623 else
624 yres = info->var.xres;
625
626 if (fb_logo.logo->height > yres) {
627 fb_logo.logo = NULL;
628 return 0;
629 }
630
631 /* What depth we asked for might be different from what we get */
632 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
633 fb_logo.depth = 8;
634 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
635 fb_logo.depth = 4;
636 else
637 fb_logo.depth = 1;
638
Antonino A. Daplas1692b372007-07-31 00:37:36 -0700639
640 if (fb_logo.depth > 4 && depth > 4) {
641 switch (info->fix.visual) {
642 case FB_VISUAL_TRUECOLOR:
643 fb_logo.needs_truepalette = 1;
644 break;
645 case FB_VISUAL_DIRECTCOLOR:
646 fb_logo.needs_directpalette = 1;
647 fb_logo.needs_cmapreset = 1;
648 break;
649 case FB_VISUAL_PSEUDOCOLOR:
650 fb_logo.needs_cmapreset = 1;
651 break;
652 }
653 }
654
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700655 return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
656}
657
Geert Uytterhoeven90da63e52007-07-17 04:05:50 -0700658int fb_show_logo(struct fb_info *info, int rotate)
659{
Geert Uytterhoeven9900abf2007-07-17 04:05:50 -0700660 int y;
661
662 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
663 num_online_cpus());
664 y = fb_show_extra_logos(info, y, rotate);
665
666 return y;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667}
668#else
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800669int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
670int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671#endif /* CONFIG_LOGO */
672
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700673static void *fb_seq_start(struct seq_file *m, loff_t *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674{
Linus Torvalds698b3682011-05-11 14:49:36 -0700675 mutex_lock(&registration_lock);
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700676 return (*pos < FB_MAX) ? pos : NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677}
678
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700679static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
680{
681 (*pos)++;
682 return (*pos < FB_MAX) ? pos : NULL;
683}
684
685static void fb_seq_stop(struct seq_file *m, void *v)
686{
Linus Torvalds698b3682011-05-11 14:49:36 -0700687 mutex_unlock(&registration_lock);
Alexey Dobriyan0aa16342008-04-28 02:15:42 -0700688}
689
690static int fb_seq_show(struct seq_file *m, void *v)
691{
692 int i = *(loff_t *)v;
693 struct fb_info *fi = registered_fb[i];
694
695 if (fi)
696 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
697 return 0;
698}
699
700static const struct seq_operations proc_fb_seq_ops = {
701 .start = fb_seq_start,
702 .next = fb_seq_next,
703 .stop = fb_seq_stop,
704 .show = fb_seq_show,
705};
706
707static int proc_fb_open(struct inode *inode, struct file *file)
708{
709 return seq_open(file, &proc_fb_seq_ops);
710}
711
712static const struct file_operations fb_proc_fops = {
713 .owner = THIS_MODULE,
714 .open = proc_fb_open,
715 .read = seq_read,
716 .llseek = seq_lseek,
717 .release = seq_release,
718};
719
Linus Torvaldsc47747f2011-05-11 14:58:34 -0700720/*
721 * We hold a reference to the fb_info in file->private_data,
722 * but if the current registered fb has changed, we don't
723 * actually want to use it.
724 *
725 * So look up the fb_info using the inode minor number,
726 * and just verify it against the reference we have.
727 */
728static struct fb_info *file_fb_info(struct file *file)
729{
730 struct inode *inode = file->f_path.dentry->d_inode;
731 int fbidx = iminor(inode);
732 struct fb_info *info = registered_fb[fbidx];
733
734 if (info != file->private_data)
735 info = NULL;
736 return info;
737}
738
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739static ssize_t
740fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
741{
742 unsigned long p = *ppos;
Linus Torvaldsc47747f2011-05-11 14:58:34 -0700743 struct fb_info *info = file_fb_info(file);
James Hoganf11b478d2010-10-27 15:33:28 -0700744 u8 *buffer, *dst;
745 u8 __iomem *src;
746 int c, cnt = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 unsigned long total_size;
748
749 if (!info || ! info->screen_base)
750 return -ENODEV;
751
752 if (info->state != FBINFO_STATE_RUNNING)
753 return -EPERM;
754
755 if (info->fbops->fb_read)
Antonino A. Daplas3f9b0882007-05-08 00:39:02 -0700756 return info->fbops->fb_read(info, buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757
758 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800759
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 if (total_size == 0)
761 total_size = info->fix.smem_len;
762
763 if (p >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800764 return 0;
765
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 if (count >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800767 count = total_size;
768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 if (count + p > total_size)
770 count = total_size - p;
771
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
773 GFP_KERNEL);
774 if (!buffer)
775 return -ENOMEM;
776
James Hoganf11b478d2010-10-27 15:33:28 -0700777 src = (u8 __iomem *) (info->screen_base + p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
779 if (info->fbops->fb_sync)
780 info->fbops->fb_sync(info);
781
782 while (count) {
783 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
784 dst = buffer;
James Hoganf11b478d2010-10-27 15:33:28 -0700785 fb_memcpy_fromfb(dst, src, c);
786 dst += c;
787 src += c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
789 if (copy_to_user(buf, buffer, c)) {
790 err = -EFAULT;
791 break;
792 }
793 *ppos += c;
794 buf += c;
795 cnt += c;
796 count -= c;
797 }
798
799 kfree(buffer);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800800
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 return (err) ? err : cnt;
802}
803
804static ssize_t
805fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
806{
807 unsigned long p = *ppos;
Linus Torvaldsc47747f2011-05-11 14:58:34 -0700808 struct fb_info *info = file_fb_info(file);
James Hoganf11b478d2010-10-27 15:33:28 -0700809 u8 *buffer, *src;
810 u8 __iomem *dst;
811 int c, cnt = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 unsigned long total_size;
813
814 if (!info || !info->screen_base)
815 return -ENODEV;
816
817 if (info->state != FBINFO_STATE_RUNNING)
818 return -EPERM;
819
820 if (info->fbops->fb_write)
Antonino A. Daplas3f9b0882007-05-08 00:39:02 -0700821 return info->fbops->fb_write(info, buf, count, ppos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822
823 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800824
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 if (total_size == 0)
826 total_size = info->fix.smem_len;
827
828 if (p > total_size)
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700829 return -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800830
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700831 if (count > total_size) {
832 err = -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800833 count = total_size;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700834 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800835
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700836 if (count + p > total_size) {
837 if (!err)
838 err = -ENOSPC;
839
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800840 count = total_size - p;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700841 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800842
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
844 GFP_KERNEL);
845 if (!buffer)
846 return -ENOMEM;
847
James Hoganf11b478d2010-10-27 15:33:28 -0700848 dst = (u8 __iomem *) (info->screen_base + p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849
850 if (info->fbops->fb_sync)
851 info->fbops->fb_sync(info);
852
853 while (count) {
854 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
855 src = buffer;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 if (copy_from_user(src, buf, c)) {
858 err = -EFAULT;
859 break;
860 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800861
James Hoganf11b478d2010-10-27 15:33:28 -0700862 fb_memcpy_tofb(dst, src, c);
863 dst += c;
864 src += c;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865 *ppos += c;
866 buf += c;
867 cnt += c;
868 count -= c;
869 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800870
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 kfree(buffer);
872
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700873 return (cnt) ? cnt : err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700874}
875
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876int
877fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
878{
Antonino A. Daplas12070692005-12-12 22:17:17 -0800879 struct fb_fix_screeninfo *fix = &info->fix;
Ville Syrjala7572a1e2008-07-23 21:31:28 -0700880 unsigned int yres = info->var.yres;
881 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882
Antonino A. Daplas12070692005-12-12 22:17:17 -0800883 if (var->yoffset > 0) {
884 if (var->vmode & FB_VMODE_YWRAP) {
885 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
886 err = -EINVAL;
887 else
888 yres = 0;
889 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
890 err = -EINVAL;
891 }
892
893 if (var->xoffset > 0 && (!fix->xpanstep ||
894 (var->xoffset % fix->xpanstep)))
895 err = -EINVAL;
896
Ville Syrjala7572a1e2008-07-23 21:31:28 -0700897 if (err || !info->fbops->fb_pan_display ||
Florian Tobias Schandinat99e9e7d2009-09-22 16:47:41 -0700898 var->yoffset > info->var.yres_virtual - yres ||
899 var->xoffset > info->var.xres_virtual - info->var.xres)
Antonino A. Daplas12070692005-12-12 22:17:17 -0800900 return -EINVAL;
901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 if ((err = info->fbops->fb_pan_display(var, info)))
903 return err;
James Hoganc9c62dc2010-10-27 15:33:27 -0700904 info->var.xoffset = var->xoffset;
905 info->var.yoffset = var->yoffset;
906 if (var->vmode & FB_VMODE_YWRAP)
907 info->var.vmode |= FB_VMODE_YWRAP;
908 else
909 info->var.vmode &= ~FB_VMODE_YWRAP;
910 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911}
912
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700913static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
914 u32 activate)
915{
916 struct fb_event event;
917 struct fb_blit_caps caps, fbcaps;
918 int err = 0;
919
920 memset(&caps, 0, sizeof(caps));
921 memset(&fbcaps, 0, sizeof(fbcaps));
922 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
923 event.info = info;
924 event.data = &caps;
925 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
926 info->fbops->fb_get_caps(info, &fbcaps, var);
927
928 if (((fbcaps.x ^ caps.x) & caps.x) ||
929 ((fbcaps.y ^ caps.y) & caps.y) ||
930 (fbcaps.len < caps.len))
931 err = -EINVAL;
932
933 return err;
934}
935
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936int
937fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
938{
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700939 int flags = info->flags;
940 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
942 if (var->activate & FB_ACTIVATE_INV_MODE) {
943 struct fb_videomode mode1, mode2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
945 fb_var_to_videomode(&mode1, var);
946 fb_var_to_videomode(&mode2, &info->var);
947 /* make sure we don't delete the videomode of current var */
948 ret = fb_mode_is_equal(&mode1, &mode2);
949
950 if (!ret) {
951 struct fb_event event;
952
953 event.info = info;
954 event.data = &mode1;
Antonino A. Daplas256154f2006-07-30 03:04:17 -0700955 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 }
957
958 if (!ret)
959 fb_delete_videomode(&mode1, &info->modelist);
960
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700961
962 ret = (ret) ? -EINVAL : 0;
963 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964 }
965
966 if ((var->activate & FB_ACTIVATE_FORCE) ||
967 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
Antonino A. Daplas4941cb72007-05-08 00:39:22 -0700968 u32 activate = var->activate;
969
Laurent Pinchartfb21c2f2011-12-13 14:02:26 +0100970 /* When using FOURCC mode, make sure the red, green, blue and
971 * transp fields are set to 0.
972 */
973 if ((info->fix.capabilities & FB_CAP_FOURCC) &&
974 var->grayscale > 1) {
975 if (var->red.offset || var->green.offset ||
976 var->blue.offset || var->transp.offset ||
977 var->red.length || var->green.length ||
978 var->blue.length || var->transp.length ||
979 var->red.msb_right || var->green.msb_right ||
980 var->blue.msb_right || var->transp.msb_right)
981 return -EINVAL;
982 }
983
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 if (!info->fbops->fb_check_var) {
985 *var = info->var;
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700986 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
988
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700989 ret = info->fbops->fb_check_var(var, info);
990
991 if (ret)
992 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993
994 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
Florian Tobias Schandinat0fcf6ad2009-09-22 16:47:44 -0700995 struct fb_var_screeninfo old_var;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 struct fb_videomode mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -0700998 if (info->fbops->fb_get_caps) {
Antonino A. Daplasb1e72232007-05-08 00:39:52 -0700999 ret = fb_check_caps(info, var, activate);
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -07001000
Antonino A. Daplasb1e72232007-05-08 00:39:52 -07001001 if (ret)
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -07001002 goto done;
1003 }
1004
Florian Tobias Schandinat0fcf6ad2009-09-22 16:47:44 -07001005 old_var = info->var;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 info->var = *var;
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -07001007
Florian Tobias Schandinat0fcf6ad2009-09-22 16:47:44 -07001008 if (info->fbops->fb_set_par) {
1009 ret = info->fbops->fb_set_par(info);
1010
1011 if (ret) {
1012 info->var = old_var;
1013 printk(KERN_WARNING "detected "
1014 "fb_set_par error, "
1015 "error code: %d\n", ret);
1016 goto done;
1017 }
1018 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019
1020 fb_pan_display(info, &info->var);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 fb_set_cmap(&info->cmap, info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 fb_var_to_videomode(&mode, &info->var);
1023
1024 if (info->modelist.prev && info->modelist.next &&
1025 !list_empty(&info->modelist))
Antonino A. Daplasb1e72232007-05-08 00:39:52 -07001026 ret = fb_add_videomode(&mode, &info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
Antonino A. Daplasb1e72232007-05-08 00:39:52 -07001028 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029 struct fb_event event;
Antonino A. Daplas4941cb72007-05-08 00:39:22 -07001030 int evnt = (activate & FB_ACTIVATE_ALL) ?
Antonino A. Daplas7726e9e2005-09-09 13:04:29 -07001031 FB_EVENT_MODE_CHANGE_ALL :
1032 FB_EVENT_MODE_CHANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033
1034 info->flags &= ~FBINFO_MISC_USEREVENT;
1035 event.info = info;
Eric Miaofaa312d2008-08-29 04:18:43 +08001036 event.data = &mode;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001037 fb_notifier_call_chain(evnt, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 }
1039 }
1040 }
Antonino A. Daplas38a3dc52007-05-08 00:39:37 -07001041
1042 done:
Antonino A. Daplasb1e72232007-05-08 00:39:52 -07001043 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044}
1045
1046int
1047fb_blank(struct fb_info *info, int blank)
1048{
Inki Daebf059292012-05-29 15:07:12 -07001049 struct fb_event event;
1050 int ret = -EINVAL, early_ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051
1052 if (blank > FB_BLANK_POWERDOWN)
1053 blank = FB_BLANK_POWERDOWN;
1054
Inki Daebf059292012-05-29 15:07:12 -07001055 event.info = info;
1056 event.data = &blank;
1057
1058 early_ret = fb_notifier_call_chain(FB_EARLY_EVENT_BLANK, &event);
1059
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 if (info->fbops->fb_blank)
1061 ret = info->fbops->fb_blank(blank, info);
1062
Inki Daebf059292012-05-29 15:07:12 -07001063 if (!ret)
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001064 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
Inki Daebf059292012-05-29 15:07:12 -07001065 else {
1066 /*
1067 * if fb_blank is failed then revert effects of
1068 * the early blank event.
1069 */
1070 if (!early_ret)
1071 fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 }
1073
1074 return ret;
1075}
1076
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001077static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1078 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079{
Alan Coxe5367712008-10-18 20:27:51 -07001080 struct fb_ops *fb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001081 struct fb_var_screeninfo var;
1082 struct fb_fix_screeninfo fix;
1083 struct fb_con2fbmap con2fb;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001084 struct fb_cmap cmap_from;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 struct fb_cmap_user cmap;
1086 struct fb_event event;
1087 void __user *argp = (void __user *)arg;
Alan Coxe5367712008-10-18 20:27:51 -07001088 long ret = 0;
1089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090 switch (cmd) {
1091 case FBIOGET_VSCREENINFO:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001092 if (!lock_fb_info(info))
1093 return -ENODEV;
1094 var = info->var;
1095 unlock_fb_info(info);
1096
1097 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
Alan Coxe5367712008-10-18 20:27:51 -07001098 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 case FBIOPUT_VSCREENINFO:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001100 if (copy_from_user(&var, argp, sizeof(var)))
1101 return -EFAULT;
1102 if (!lock_fb_info(info))
1103 return -ENODEV;
Torben Hohnac751ef2011-01-25 15:07:35 -08001104 console_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 info->flags |= FBINFO_MISC_USEREVENT;
Alan Coxe5367712008-10-18 20:27:51 -07001106 ret = fb_set_var(info, &var);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 info->flags &= ~FBINFO_MISC_USEREVENT;
Torben Hohnac751ef2011-01-25 15:07:35 -08001108 console_unlock();
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001109 unlock_fb_info(info);
1110 if (!ret && copy_to_user(argp, &var, sizeof(var)))
Alan Coxe5367712008-10-18 20:27:51 -07001111 ret = -EFAULT;
1112 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 case FBIOGET_FSCREENINFO:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001114 if (!lock_fb_info(info))
1115 return -ENODEV;
1116 fix = info->fix;
1117 unlock_fb_info(info);
1118
1119 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
Alan Coxe5367712008-10-18 20:27:51 -07001120 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 case FBIOPUTCMAP:
1122 if (copy_from_user(&cmap, argp, sizeof(cmap)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001123 return -EFAULT;
1124 ret = fb_set_user_cmap(&cmap, info);
Alan Coxe5367712008-10-18 20:27:51 -07001125 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 case FBIOGETCMAP:
1127 if (copy_from_user(&cmap, argp, sizeof(cmap)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001128 return -EFAULT;
1129 if (!lock_fb_info(info))
1130 return -ENODEV;
1131 cmap_from = info->cmap;
1132 unlock_fb_info(info);
1133 ret = fb_cmap_to_user(&cmap_from, &cmap);
Alan Coxe5367712008-10-18 20:27:51 -07001134 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 case FBIOPAN_DISPLAY:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001136 if (copy_from_user(&var, argp, sizeof(var)))
1137 return -EFAULT;
1138 if (!lock_fb_info(info))
1139 return -ENODEV;
Torben Hohnac751ef2011-01-25 15:07:35 -08001140 console_lock();
Alan Coxe5367712008-10-18 20:27:51 -07001141 ret = fb_pan_display(info, &var);
Torben Hohnac751ef2011-01-25 15:07:35 -08001142 console_unlock();
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001143 unlock_fb_info(info);
Alan Coxe5367712008-10-18 20:27:51 -07001144 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001145 return -EFAULT;
Alan Coxe5367712008-10-18 20:27:51 -07001146 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 case FBIO_CURSOR:
Alan Coxe5367712008-10-18 20:27:51 -07001148 ret = -EINVAL;
1149 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 case FBIOGET_CON2FBMAP:
1151 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001152 return -EFAULT;
1153 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1154 return -EINVAL;
1155 con2fb.framebuffer = -1;
1156 event.data = &con2fb;
Andrea Righi513adb52009-04-13 14:39:39 -07001157 if (!lock_fb_info(info))
1158 return -ENODEV;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001159 event.info = info;
1160 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001161 unlock_fb_info(info);
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001162 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
Alan Coxe5367712008-10-18 20:27:51 -07001163 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001164 case FBIOPUT_CON2FBMAP:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001165 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1166 return -EFAULT;
1167 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1168 return -EINVAL;
1169 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1170 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001171 if (!registered_fb[con2fb.framebuffer])
Alan Coxe5367712008-10-18 20:27:51 -07001172 request_module("fb%d", con2fb.framebuffer);
1173 if (!registered_fb[con2fb.framebuffer]) {
1174 ret = -EINVAL;
1175 break;
1176 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 event.data = &con2fb;
Andrea Righi513adb52009-04-13 14:39:39 -07001178 if (!lock_fb_info(info))
1179 return -ENODEV;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001180 event.info = info;
Andrea Righi66c1ca02009-03-31 15:25:18 -07001181 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001182 unlock_fb_info(info);
Alan Coxe5367712008-10-18 20:27:51 -07001183 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 case FBIOBLANK:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001185 if (!lock_fb_info(info))
1186 return -ENODEV;
Torben Hohnac751ef2011-01-25 15:07:35 -08001187 console_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188 info->flags |= FBINFO_MISC_USEREVENT;
Alan Coxe5367712008-10-18 20:27:51 -07001189 ret = fb_blank(info, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 info->flags &= ~FBINFO_MISC_USEREVENT;
Torben Hohnac751ef2011-01-25 15:07:35 -08001191 console_unlock();
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001192 unlock_fb_info(info);
1193 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 default:
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001195 if (!lock_fb_info(info))
1196 return -ENODEV;
1197 fb = info->fbops;
1198 if (fb->fb_ioctl)
Alan Coxe5367712008-10-18 20:27:51 -07001199 ret = fb->fb_ioctl(info, cmd, arg);
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001200 else
1201 ret = -ENOTTY;
1202 unlock_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001203 }
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001204 return ret;
1205}
1206
1207static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001208{
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001209 struct fb_info *info = file_fb_info(file);
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001210
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001211 if (!info)
1212 return -ENODEV;
Andrea Righi1f5e31d2009-02-04 15:12:03 -08001213 return do_fb_ioctl(info, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001214}
1215
1216#ifdef CONFIG_COMPAT
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001217struct fb_fix_screeninfo32 {
1218 char id[16];
1219 compat_caddr_t smem_start;
1220 u32 smem_len;
1221 u32 type;
1222 u32 type_aux;
1223 u32 visual;
1224 u16 xpanstep;
1225 u16 ypanstep;
1226 u16 ywrapstep;
1227 u32 line_length;
1228 compat_caddr_t mmio_start;
1229 u32 mmio_len;
1230 u32 accel;
1231 u16 reserved[3];
1232};
1233
1234struct fb_cmap32 {
1235 u32 start;
1236 u32 len;
1237 compat_caddr_t red;
1238 compat_caddr_t green;
1239 compat_caddr_t blue;
1240 compat_caddr_t transp;
1241};
1242
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001243static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1244 unsigned long arg)
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001245{
1246 struct fb_cmap_user __user *cmap;
1247 struct fb_cmap32 __user *cmap32;
1248 __u32 data;
1249 int err;
1250
1251 cmap = compat_alloc_user_space(sizeof(*cmap));
1252 cmap32 = compat_ptr(arg);
1253
1254 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1255 return -EFAULT;
1256
1257 if (get_user(data, &cmap32->red) ||
1258 put_user(compat_ptr(data), &cmap->red) ||
1259 get_user(data, &cmap32->green) ||
1260 put_user(compat_ptr(data), &cmap->green) ||
1261 get_user(data, &cmap32->blue) ||
1262 put_user(compat_ptr(data), &cmap->blue) ||
1263 get_user(data, &cmap32->transp) ||
1264 put_user(compat_ptr(data), &cmap->transp))
1265 return -EFAULT;
1266
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001267 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001268
1269 if (!err) {
1270 if (copy_in_user(&cmap32->start,
1271 &cmap->start,
1272 2 * sizeof(__u32)))
1273 err = -EFAULT;
1274 }
1275 return err;
1276}
1277
1278static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1279 struct fb_fix_screeninfo32 __user *fix32)
1280{
1281 __u32 data;
1282 int err;
1283
1284 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1285
1286 data = (__u32) (unsigned long) fix->smem_start;
1287 err |= put_user(data, &fix32->smem_start);
1288
1289 err |= put_user(fix->smem_len, &fix32->smem_len);
1290 err |= put_user(fix->type, &fix32->type);
1291 err |= put_user(fix->type_aux, &fix32->type_aux);
1292 err |= put_user(fix->visual, &fix32->visual);
1293 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1294 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1295 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1296 err |= put_user(fix->line_length, &fix32->line_length);
1297
1298 data = (__u32) (unsigned long) fix->mmio_start;
1299 err |= put_user(data, &fix32->mmio_start);
1300
1301 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1302 err |= put_user(fix->accel, &fix32->accel);
1303 err |= copy_to_user(fix32->reserved, fix->reserved,
1304 sizeof(fix->reserved));
1305
1306 return err;
1307}
1308
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001309static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1310 unsigned long arg)
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001311{
1312 mm_segment_t old_fs;
1313 struct fb_fix_screeninfo fix;
1314 struct fb_fix_screeninfo32 __user *fix32;
1315 int err;
1316
1317 fix32 = compat_ptr(arg);
1318
1319 old_fs = get_fs();
1320 set_fs(KERNEL_DS);
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001321 err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001322 set_fs(old_fs);
1323
1324 if (!err)
1325 err = do_fscreeninfo_to_user(&fix, fix32);
1326
1327 return err;
1328}
1329
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001330static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1331 unsigned long arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332{
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001333 struct fb_info *info = file_fb_info(file);
1334 struct fb_ops *fb;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001335 long ret = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001337 if (!info)
1338 return -ENODEV;
1339 fb = info->fbops;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001340 switch(cmd) {
1341 case FBIOGET_VSCREENINFO:
1342 case FBIOPUT_VSCREENINFO:
1343 case FBIOPAN_DISPLAY:
1344 case FBIOGET_CON2FBMAP:
1345 case FBIOPUT_CON2FBMAP:
1346 arg = (unsigned long) compat_ptr(arg);
1347 case FBIOBLANK:
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001348 ret = do_fb_ioctl(info, cmd, arg);
1349 break;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001350
1351 case FBIOGET_FSCREENINFO:
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001352 ret = fb_get_fscreeninfo(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001353 break;
1354
1355 case FBIOGETCMAP:
1356 case FBIOPUTCMAP:
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001357 ret = fb_getput_cmap(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001358 break;
1359
1360 default:
1361 if (fb->fb_compat_ioctl)
Christoph Hellwig67a66802006-01-14 13:21:25 -08001362 ret = fb->fb_compat_ioctl(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001363 break;
1364 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365 return ret;
1366}
1367#endif
1368
Antonino A. Daplas10eb2652007-07-17 04:05:27 -07001369static int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370fb_mmap(struct file *file, struct vm_area_struct * vma)
1371{
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001372 struct fb_info *info = file_fb_info(file);
1373 struct fb_ops *fb;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 unsigned long off;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375 unsigned long start;
1376 u32 len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001378 if (!info)
1379 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1381 return -EINVAL;
1382 off = vma->vm_pgoff << PAGE_SHIFT;
Linus Torvaldsc47747f2011-05-11 14:58:34 -07001383 fb = info->fbops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 if (!fb)
1385 return -ENODEV;
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001386 mutex_lock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001387 if (fb->fb_mmap) {
1388 int res;
Christoph Hellwig216d5262006-01-14 13:21:25 -08001389 res = fb->fb_mmap(info, vma);
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001390 mutex_unlock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001391 return res;
1392 }
1393
Linus Torvalds1da177e2005-04-16 15:20:36 -07001394 /* frame buffer memory */
1395 start = info->fix.smem_start;
1396 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1397 if (off >= len) {
1398 /* memory mapped io */
1399 off -= len;
1400 if (info->var.accel_flags) {
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001401 mutex_unlock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001402 return -EINVAL;
1403 }
1404 start = info->fix.mmio_start;
1405 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1406 }
Krzysztof Helt537a1bf2009-06-30 11:41:29 -07001407 mutex_unlock(&info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 start &= PAGE_MASK;
1409 if ((vma->vm_end - vma->vm_start + off) > len)
1410 return -EINVAL;
1411 off += start;
1412 vma->vm_pgoff = off >> PAGE_SHIFT;
Konstantin Khlebnikov314e51b2012-10-08 16:29:02 -07001413 /* VM_IO | VM_DONTEXPAND | VM_DONTDUMP are set by io_remap_pfn_range()*/
Daniel De Graafc07fbfd2010-08-10 18:02:45 -07001414 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
Antonino A. Daplas10eb2652007-07-17 04:05:27 -07001415 fb_pgprotect(file, vma, off);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001416 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1417 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1418 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001419 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001420}
1421
1422static int
1423fb_open(struct inode *inode, struct file *file)
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001424__acquires(&info->lock)
1425__releases(&info->lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426{
1427 int fbidx = iminor(inode);
1428 struct fb_info *info;
1429 int res = 0;
1430
Linus Torvalds698b3682011-05-11 14:49:36 -07001431 info = get_fb_info(fbidx);
1432 if (!info) {
Johannes Berga65e5d72008-07-09 10:28:38 +02001433 request_module("fb%d", fbidx);
Linus Torvalds698b3682011-05-11 14:49:36 -07001434 info = get_fb_info(fbidx);
1435 if (!info)
1436 return -ENODEV;
1437 }
1438 if (IS_ERR(info))
1439 return PTR_ERR(info);
1440
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001441 mutex_lock(&info->lock);
Jonathan Corbetfc7f6872008-05-15 16:30:36 -06001442 if (!try_module_get(info->fbops->owner)) {
1443 res = -ENODEV;
1444 goto out;
1445 }
Thomas Koellercae8a122006-01-09 20:53:48 -08001446 file->private_data = info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001447 if (info->fbops->fb_open) {
1448 res = info->fbops->fb_open(info,1);
1449 if (res)
1450 module_put(info->fbops->owner);
1451 }
Ian Campbelld8474712008-08-20 14:09:23 -07001452#ifdef CONFIG_FB_DEFERRED_IO
1453 if (info->fbdefio)
1454 fb_deferred_io_open(info, inode, file);
1455#endif
Jonathan Corbetfc7f6872008-05-15 16:30:36 -06001456out:
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001457 mutex_unlock(&info->lock);
Linus Torvalds698b3682011-05-11 14:49:36 -07001458 if (res)
1459 put_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001460 return res;
1461}
1462
1463static int
1464fb_release(struct inode *inode, struct file *file)
Geert Uytterhoevena684e7d2008-11-06 12:53:37 -08001465__acquires(&info->lock)
1466__releases(&info->lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467{
Thomas Koellercae8a122006-01-09 20:53:48 -08001468 struct fb_info * const info = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001470 mutex_lock(&info->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471 if (info->fbops->fb_release)
1472 info->fbops->fb_release(info,1);
1473 module_put(info->fbops->owner);
Krzysztof Helt3e680aa2008-10-18 20:27:51 -07001474 mutex_unlock(&info->lock);
Linus Torvalds698b3682011-05-11 14:49:36 -07001475 put_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476 return 0;
1477}
1478
Helge Deller0128bee2006-12-08 02:40:29 -08001479static const struct file_operations fb_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480 .owner = THIS_MODULE,
1481 .read = fb_read,
1482 .write = fb_write,
Alan Coxe5367712008-10-18 20:27:51 -07001483 .unlocked_ioctl = fb_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484#ifdef CONFIG_COMPAT
1485 .compat_ioctl = fb_compat_ioctl,
1486#endif
1487 .mmap = fb_mmap,
1488 .open = fb_open,
1489 .release = fb_release,
1490#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1491 .get_unmapped_area = get_fb_unmapped_area,
1492#endif
Paul Mundt5e841b82007-05-08 00:37:41 -07001493#ifdef CONFIG_FB_DEFERRED_IO
1494 .fsync = fb_deferred_io_fsync,
1495#endif
Arnd Bergmann6038f372010-08-15 18:52:59 +02001496 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497};
1498
Antonino A. Daplas9a179172006-06-26 00:27:05 -07001499struct class *fb_class;
1500EXPORT_SYMBOL(fb_class);
Anton Vorontsove4c690e2008-04-28 02:14:49 -07001501
1502static int fb_check_foreignness(struct fb_info *fi)
1503{
1504 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1505
1506 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1507
1508#ifdef __BIG_ENDIAN
1509 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1510#else
1511 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1512#endif /* __BIG_ENDIAN */
1513
1514 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1515 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1516 "support this framebuffer\n", fi->fix.id);
1517 return -ENOSYS;
1518 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1519 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1520 "support this framebuffer\n", fi->fix.id);
1521 return -ENOSYS;
1522 }
1523
1524 return 0;
1525}
1526
Marcin Slusarz1471ca92010-05-16 17:27:03 +02001527static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
Dave Airlie4410f392009-06-16 15:34:38 -07001528{
1529 /* is the generic aperture base the same as the HW one */
Marcin Slusarz1471ca92010-05-16 17:27:03 +02001530 if (gen->base == hw->base)
Dave Airlie4410f392009-06-16 15:34:38 -07001531 return true;
1532 /* is the generic aperture base inside the hw base->hw base+size */
Dave Airlieacd0acb2010-12-21 01:41:15 +00001533 if (gen->base > hw->base && gen->base < hw->base + hw->size)
Dave Airlie4410f392009-06-16 15:34:38 -07001534 return true;
1535 return false;
1536}
Marcin Slusarz1471ca92010-05-16 17:27:03 +02001537
Marcin Slusarz06415c52010-05-16 17:29:56 +02001538static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1539 struct apertures_struct *hwa)
Marcin Slusarz1471ca92010-05-16 17:27:03 +02001540{
1541 int i, j;
Marcin Slusarz1471ca92010-05-16 17:27:03 +02001542 if (!hwa || !gena)
1543 return false;
1544
1545 for (i = 0; i < hwa->count; ++i) {
1546 struct aperture *h = &hwa->ranges[i];
1547 for (j = 0; j < gena->count; ++j) {
1548 struct aperture *g = &gena->ranges[j];
1549 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
Randy Dunlapf4b87de2010-05-21 12:44:47 -07001550 (unsigned long long)g->base,
1551 (unsigned long long)g->size,
1552 (unsigned long long)h->base,
1553 (unsigned long long)h->size);
Marcin Slusarz1471ca92010-05-16 17:27:03 +02001554 if (apertures_overlap(g, h))
1555 return true;
1556 }
1557 }
1558
1559 return false;
1560}
1561
Linus Torvalds712f3142011-05-13 16:16:41 -07001562static int do_unregister_framebuffer(struct fb_info *fb_info);
1563
Marcin Slusarz3b9676e2010-05-16 17:33:09 +02001564#define VGA_FB_PHYS 0xA0000
Linus Torvalds712f3142011-05-13 16:16:41 -07001565static void do_remove_conflicting_framebuffers(struct apertures_struct *a,
Marcin Slusarz3b9676e2010-05-16 17:33:09 +02001566 const char *name, bool primary)
Marcin Slusarz06415c52010-05-16 17:29:56 +02001567{
1568 int i;
1569
1570 /* check all firmware fbs and kick off if the base addr overlaps */
1571 for (i = 0 ; i < FB_MAX; i++) {
Marcin Slusarz3b9676e2010-05-16 17:33:09 +02001572 struct apertures_struct *gen_aper;
Marcin Slusarz06415c52010-05-16 17:29:56 +02001573 if (!registered_fb[i])
1574 continue;
1575
1576 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1577 continue;
1578
Marcin Slusarz3b9676e2010-05-16 17:33:09 +02001579 gen_aper = registered_fb[i]->apertures;
1580 if (fb_do_apertures_overlap(gen_aper, a) ||
1581 (primary && gen_aper && gen_aper->count &&
1582 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1583
Matthew Garrett47c87d92011-04-04 21:39:54 +00001584 printk(KERN_INFO "fb: conflicting fb hw usage "
Marcin Slusarz06415c52010-05-16 17:29:56 +02001585 "%s vs %s - removing generic driver\n",
1586 name, registered_fb[i]->fix.id);
Linus Torvalds712f3142011-05-13 16:16:41 -07001587 do_unregister_framebuffer(registered_fb[i]);
Marcin Slusarz06415c52010-05-16 17:29:56 +02001588 }
1589 }
1590}
Marcin Slusarz06415c52010-05-16 17:29:56 +02001591
Linus Torvalds712f3142011-05-13 16:16:41 -07001592static int do_register_framebuffer(struct fb_info *fb_info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001593{
1594 int i;
1595 struct fb_event event;
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001596 struct fb_videomode mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
Anton Vorontsove4c690e2008-04-28 02:14:49 -07001598 if (fb_check_foreignness(fb_info))
1599 return -ENOSYS;
1600
Linus Torvalds712f3142011-05-13 16:16:41 -07001601 do_remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id,
Marcin Slusarz3b9676e2010-05-16 17:33:09 +02001602 fb_is_primary_device(fb_info));
Dave Airlie4410f392009-06-16 15:34:38 -07001603
Bruno Prémontc590cec2011-05-14 12:24:15 +02001604 if (num_registered_fb == FB_MAX)
1605 return -ENXIO;
1606
Linus Torvalds1da177e2005-04-16 15:20:36 -07001607 num_registered_fb++;
1608 for (i = 0 ; i < FB_MAX; i++)
1609 if (!registered_fb[i])
1610 break;
1611 fb_info->node = i;
Linus Torvalds698b3682011-05-11 14:49:36 -07001612 atomic_set(&fb_info->count, 1);
Linus Torvalds6c968952009-07-08 09:20:11 -07001613 mutex_init(&fb_info->lock);
1614 mutex_init(&fb_info->mm_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001615
Greg Kroah-Hartman77997aa2008-07-21 20:03:34 -07001616 fb_info->dev = device_create(fb_class, fb_info->device,
1617 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001618 if (IS_ERR(fb_info->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619 /* Not fatal */
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001620 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1621 fb_info->dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001622 } else
Greg Kroah-Hartman78cde08872006-09-14 07:30:59 -07001623 fb_init_device(fb_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624
1625 if (fb_info->pixmap.addr == NULL) {
1626 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1627 if (fb_info->pixmap.addr) {
1628 fb_info->pixmap.size = FBPIXMAPSIZE;
1629 fb_info->pixmap.buf_align = 1;
1630 fb_info->pixmap.scan_align = 1;
James Simmons58a60642005-06-21 17:17:08 -07001631 fb_info->pixmap.access_align = 32;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001632 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1633 }
1634 }
1635 fb_info->pixmap.offset = 0;
1636
Antonino A. Daplasbf26ad72007-05-08 00:39:09 -07001637 if (!fb_info->pixmap.blit_x)
1638 fb_info->pixmap.blit_x = ~(u32)0;
1639
1640 if (!fb_info->pixmap.blit_y)
1641 fb_info->pixmap.blit_y = ~(u32)0;
1642
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001643 if (!fb_info->modelist.prev || !fb_info->modelist.next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001644 INIT_LIST_HEAD(&fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001645
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001646 fb_var_to_videomode(&mode, &fb_info->var);
1647 fb_add_videomode(&mode, &fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001648 registered_fb[i] = fb_info;
1649
Linus Torvalds1da177e2005-04-16 15:20:36 -07001650 event.info = fb_info;
Andrea Righi513adb52009-04-13 14:39:39 -07001651 if (!lock_fb_info(fb_info))
1652 return -ENODEV;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001653 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001654 unlock_fb_info(fb_info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001655 return 0;
1656}
1657
Linus Torvalds712f3142011-05-13 16:16:41 -07001658static int do_unregister_framebuffer(struct fb_info *fb_info)
1659{
1660 struct fb_event event;
1661 int i, ret = 0;
1662
1663 i = fb_info->node;
Bruno Prémontc590cec2011-05-14 12:24:15 +02001664 if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
Linus Torvalds712f3142011-05-13 16:16:41 -07001665 return -EINVAL;
1666
1667 if (!lock_fb_info(fb_info))
1668 return -ENODEV;
1669 event.info = fb_info;
1670 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1671 unlock_fb_info(fb_info);
1672
1673 if (ret)
1674 return -EINVAL;
1675
Kay Sieversce880cb2012-01-28 19:57:46 +00001676 unlink_framebuffer(fb_info);
Linus Torvalds712f3142011-05-13 16:16:41 -07001677 if (fb_info->pixmap.addr &&
1678 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1679 kfree(fb_info->pixmap.addr);
1680 fb_destroy_modelist(&fb_info->modelist);
1681 registered_fb[i] = NULL;
1682 num_registered_fb--;
1683 fb_cleanup_device(fb_info);
Linus Torvalds712f3142011-05-13 16:16:41 -07001684 event.info = fb_info;
1685 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1686
1687 /* this may free fb info */
1688 put_fb_info(fb_info);
1689 return 0;
1690}
1691
Kay Sieversce880cb2012-01-28 19:57:46 +00001692int unlink_framebuffer(struct fb_info *fb_info)
1693{
1694 int i;
1695
1696 i = fb_info->node;
1697 if (i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)
1698 return -EINVAL;
1699
1700 if (fb_info->dev) {
1701 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1702 fb_info->dev = NULL;
1703 }
1704 return 0;
1705}
1706EXPORT_SYMBOL(unlink_framebuffer);
1707
Linus Torvalds712f3142011-05-13 16:16:41 -07001708void remove_conflicting_framebuffers(struct apertures_struct *a,
1709 const char *name, bool primary)
1710{
1711 mutex_lock(&registration_lock);
1712 do_remove_conflicting_framebuffers(a, name, primary);
1713 mutex_unlock(&registration_lock);
1714}
1715EXPORT_SYMBOL(remove_conflicting_framebuffers);
1716
1717/**
1718 * register_framebuffer - registers a frame buffer device
1719 * @fb_info: frame buffer info structure
1720 *
1721 * Registers a frame buffer device @fb_info.
1722 *
1723 * Returns negative errno on error, or zero for success.
1724 *
1725 */
1726int
1727register_framebuffer(struct fb_info *fb_info)
1728{
1729 int ret;
1730
1731 mutex_lock(&registration_lock);
1732 ret = do_register_framebuffer(fb_info);
1733 mutex_unlock(&registration_lock);
1734
1735 return ret;
1736}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001737
1738/**
1739 * unregister_framebuffer - releases a frame buffer device
1740 * @fb_info: frame buffer info structure
1741 *
1742 * Unregisters a frame buffer device @fb_info.
1743 *
1744 * Returns negative errno on error, or zero for success.
1745 *
Jesse Barnescfafca82007-07-17 04:05:33 -07001746 * This function will also notify the framebuffer console
1747 * to release the driver.
1748 *
1749 * This is meant to be called within a driver's module_exit()
1750 * function. If this is called outside module_exit(), ensure
1751 * that the driver implements fb_open() and fb_release() to
1752 * check that no processes are using the device.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001753 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754int
1755unregister_framebuffer(struct fb_info *fb_info)
1756{
Linus Torvalds712f3142011-05-13 16:16:41 -07001757 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758
Linus Torvalds698b3682011-05-11 14:49:36 -07001759 mutex_lock(&registration_lock);
Linus Torvalds712f3142011-05-13 16:16:41 -07001760 ret = do_unregister_framebuffer(fb_info);
Linus Torvalds698b3682011-05-11 14:49:36 -07001761 mutex_unlock(&registration_lock);
Linus Torvalds712f3142011-05-13 16:16:41 -07001762
Jesse Barnescfafca82007-07-17 04:05:33 -07001763 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001764}
1765
1766/**
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 * fb_set_suspend - low level driver signals suspend
1768 * @info: framebuffer affected
1769 * @state: 0 = resuming, !=0 = suspending
1770 *
1771 * This is meant to be used by low level drivers to
1772 * signal suspend/resume to the core & clients.
1773 * It must be called with the console semaphore held
1774 */
1775void fb_set_suspend(struct fb_info *info, int state)
1776{
1777 struct fb_event event;
1778
1779 event.info = info;
1780 if (state) {
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001781 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001782 info->state = FBINFO_STATE_SUSPENDED;
1783 } else {
1784 info->state = FBINFO_STATE_RUNNING;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001785 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786 }
1787}
1788
1789/**
1790 * fbmem_init - init frame buffer subsystem
1791 *
1792 * Initialize the frame buffer subsystem.
1793 *
1794 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1795 *
1796 */
1797
1798static int __init
1799fbmem_init(void)
1800{
Alexey Dobriyan0aa16342008-04-28 02:15:42 -07001801 proc_create("fb", 0, NULL, &fb_proc_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001802
Linus Torvalds1da177e2005-04-16 15:20:36 -07001803 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1804 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1805
gregkh@suse.de56b22932005-03-23 10:01:41 -08001806 fb_class = class_create(THIS_MODULE, "graphics");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001807 if (IS_ERR(fb_class)) {
1808 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1809 fb_class = NULL;
1810 }
1811 return 0;
1812}
1813
1814#ifdef MODULE
1815module_init(fbmem_init);
1816static void __exit
1817fbmem_exit(void)
1818{
Alexey Dobriyanc43f89c2008-04-15 14:34:33 -07001819 remove_proc_entry("fb", NULL);
gregkh@suse.de56b22932005-03-23 10:01:41 -08001820 class_destroy(fb_class);
Jon Smirl5a340cc2005-07-27 11:46:04 -07001821 unregister_chrdev(FB_MAJOR, "fb");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001822}
1823
1824module_exit(fbmem_exit);
1825MODULE_LICENSE("GPL");
1826MODULE_DESCRIPTION("Framebuffer base");
1827#else
1828subsys_initcall(fbmem_init);
1829#endif
1830
1831int fb_new_modelist(struct fb_info *info)
1832{
1833 struct fb_event event;
1834 struct fb_var_screeninfo var = info->var;
1835 struct list_head *pos, *n;
1836 struct fb_modelist *modelist;
1837 struct fb_videomode *m, mode;
1838 int err = 1;
1839
1840 list_for_each_safe(pos, n, &info->modelist) {
1841 modelist = list_entry(pos, struct fb_modelist, list);
1842 m = &modelist->mode;
1843 fb_videomode_to_var(&var, m);
1844 var.activate = FB_ACTIVATE_TEST;
1845 err = fb_set_var(info, &var);
1846 fb_var_to_videomode(&mode, &var);
1847 if (err || !fb_mode_is_equal(m, &mode)) {
1848 list_del(pos);
1849 kfree(pos);
1850 }
1851 }
1852
1853 err = 1;
1854
1855 if (!list_empty(&info->modelist)) {
Andrea Righi513adb52009-04-13 14:39:39 -07001856 if (!lock_fb_info(info))
1857 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001858 event.info = info;
Antonino A. Daplas256154f2006-07-30 03:04:17 -07001859 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
Andrea Righi513adb52009-04-13 14:39:39 -07001860 unlock_fb_info(info);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001861 }
1862
1863 return err;
1864}
1865
Helge Deller0128bee2006-12-08 02:40:29 -08001866static char *video_options[FB_MAX] __read_mostly;
1867static int ofonly __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001868
1869/**
1870 * fb_get_options - get kernel boot parameters
1871 * @name: framebuffer name as it would appear in
1872 * the boot parameter line
1873 * (video=<name>:<options>)
1874 * @option: the option will be stored here
1875 *
1876 * NOTE: Needed to maintain backwards compatibility
1877 */
1878int fb_get_options(char *name, char **option)
1879{
1880 char *opt, *options = NULL;
Denys Vlasenkoa67ef272010-08-10 18:02:30 -07001881 int retval = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001882 int name_len = strlen(name), i;
1883
1884 if (name_len && ofonly && strncmp(name, "offb", 4))
1885 retval = 1;
1886
1887 if (name_len && !retval) {
1888 for (i = 0; i < FB_MAX; i++) {
1889 if (video_options[i] == NULL)
1890 continue;
Denys Vlasenkoa67ef272010-08-10 18:02:30 -07001891 if (!video_options[i][0])
Linus Torvalds1da177e2005-04-16 15:20:36 -07001892 continue;
1893 opt = video_options[i];
1894 if (!strncmp(name, opt, name_len) &&
1895 opt[name_len] == ':')
1896 options = opt + name_len + 1;
1897 }
1898 }
1899 if (options && !strncmp(options, "off", 3))
1900 retval = 1;
1901
1902 if (option)
1903 *option = options;
1904
1905 return retval;
1906}
1907
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001908#ifndef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909/**
1910 * video_setup - process command line options
1911 * @options: string of options
1912 *
1913 * Process command line options for frame buffer subsystem.
1914 *
1915 * NOTE: This function is a __setup and __init function.
1916 * It only stores the options. Drivers have to call
1917 * fb_get_options() as necessary.
1918 *
1919 * Returns zero.
1920 *
1921 */
Adrian Bunk75c96f82005-05-05 16:16:09 -07001922static int __init video_setup(char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001923{
1924 int i, global = 0;
1925
1926 if (!options || !*options)
1927 global = 1;
1928
1929 if (!global && !strncmp(options, "ofonly", 6)) {
1930 ofonly = 1;
1931 global = 1;
1932 }
1933
Dave Airlief8033032009-09-16 20:45:09 +10001934 if (!global && !strchr(options, ':')) {
Geert Uytterhoeven9a054fb2007-10-16 01:29:51 -07001935 fb_mode_option = options;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 global = 1;
1937 }
1938
1939 if (!global) {
1940 for (i = 0; i < FB_MAX; i++) {
1941 if (video_options[i] == NULL) {
1942 video_options[i] = options;
1943 break;
1944 }
1945
1946 }
1947 }
1948
OGAWA Hirofumi9b410462006-03-31 02:30:33 -08001949 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001950}
1951__setup("video=", video_setup);
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001952#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001953
1954 /*
1955 * Visible symbols for modules
1956 */
1957
1958EXPORT_SYMBOL(register_framebuffer);
1959EXPORT_SYMBOL(unregister_framebuffer);
1960EXPORT_SYMBOL(num_registered_fb);
1961EXPORT_SYMBOL(registered_fb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962EXPORT_SYMBOL(fb_show_logo);
1963EXPORT_SYMBOL(fb_set_var);
1964EXPORT_SYMBOL(fb_blank);
1965EXPORT_SYMBOL(fb_pan_display);
1966EXPORT_SYMBOL(fb_get_buffer_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001967EXPORT_SYMBOL(fb_set_suspend);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968EXPORT_SYMBOL(fb_get_options);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969
1970MODULE_LICENSE("GPL");