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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>
19#include <linux/sched.h>
20#include <linux/smp_lock.h>
21#include <linux/kernel.h>
22#include <linux/major.h>
23#include <linux/slab.h>
24#include <linux/mm.h>
25#include <linux/mman.h>
Jon Smirla8f340e2006-07-10 04:44:12 -070026#include <linux/vt.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/init.h>
28#include <linux/linux_logo.h>
29#include <linux/proc_fs.h>
30#include <linux/console.h>
31#ifdef CONFIG_KMOD
32#include <linux/kmod.h>
33#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/device.h>
36#include <linux/efi.h>
37
38#if defined(__mc68000__) || defined(CONFIG_APUS)
39#include <asm/setup.h>
40#endif
41
42#include <asm/io.h>
43#include <asm/uaccess.h>
44#include <asm/page.h>
45#include <asm/pgtable.h>
46
47#include <linux/fb.h>
48
49 /*
50 * Frame buffer device initialization and setup routines
51 */
52
53#define FBPIXMAPSIZE (1024 * 8)
54
Alan Sterne041c682006-03-27 01:16:30 -080055static BLOCKING_NOTIFIER_HEAD(fb_notifier_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056struct fb_info *registered_fb[FB_MAX];
57int num_registered_fb;
58
59/*
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{
206 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
207 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
243 for (i = 32; i < logo->clutsize; i++)
244 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. Daplasb8c90942005-09-09 13:04:37 -0700256 if (fb_get_color_depth(&info->var, &info->fix) == 3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 fg = 7;
258
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700259 if (info->fix.visual == FB_VISUAL_MONO01 ||
260 info->fix.visual == FB_VISUAL_MONO10)
261 fg = ~((u8) (0xfff << info->var.green.length));
262
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 switch (depth) {
264 case 4:
265 for (i = 0; i < logo->height; i++)
266 for (j = 0; j < logo->width; src++) {
267 *dst++ = *src >> 4;
268 j++;
269 if (j < logo->width) {
270 *dst++ = *src & 0x0f;
271 j++;
272 }
273 }
274 break;
275 case 1:
276 for (i = 0; i < logo->height; i++) {
277 for (j = 0; j < logo->width; src++) {
278 d = *src ^ xor;
279 for (k = 7; k >= 0; k--) {
280 *dst++ = ((d >> k) & 1) ? fg : 0;
281 j++;
282 }
283 }
284 }
285 break;
286 }
287}
288
289/*
290 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
291 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
292 * the visual format and color depth of the framebuffer, the DAC, the
293 * pseudo_palette, and the logo data will be adjusted accordingly.
294 *
295 * Case 1 - linux_logo_clut224:
296 * Color exceeds the number of console colors (16), thus we set the hardware DAC
297 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
298 *
299 * For visuals that require color info from the pseudo_palette, we also construct
300 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
301 * will be set.
302 *
303 * Case 2 - linux_logo_vga16:
304 * The number of colors just matches the console colors, thus there is no need
305 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
306 * each byte contains color information for two pixels (upper and lower nibble).
307 * To be consistent with fb_imageblit() usage, we therefore separate the two
308 * nibbles into separate bytes. The "depth" flag will be set to 4.
309 *
310 * Case 3 - linux_logo_mono:
311 * This is similar with Case 2. Each byte contains information for 8 pixels.
312 * We isolate each bit and expand each into a byte. The "depth" flag will
313 * be set to 1.
314 */
315static struct logo_data {
316 int depth;
317 int needs_directpalette;
318 int needs_truepalette;
319 int needs_cmapreset;
320 const struct linux_logo *logo;
321} fb_logo;
322
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800323static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
324{
325 u32 size = width * height, i;
326
327 out += size - 1;
328
329 for (i = size; i--; )
330 *out-- = *in++;
331}
332
333static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
334{
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700335 int i, j, h = height - 1;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800336
337 for (i = 0; i < height; i++)
338 for (j = 0; j < width; j++)
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700339 out[height * j + h - i] = *in++;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800340}
341
342static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
343{
344 int i, j, w = width - 1;
345
346 for (i = 0; i < height; i++)
347 for (j = 0; j < width; j++)
348 out[height * (w - j) + i] = *in++;
349}
350
351static void fb_rotate_logo(struct fb_info *info, u8 *dst,
352 struct fb_image *image, int rotate)
353{
354 u32 tmp;
355
356 if (rotate == FB_ROTATE_UD) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800357 fb_rotate_logo_ud(image->data, dst, image->width,
358 image->height);
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700359 image->dx = info->var.xres - image->width;
360 image->dy = info->var.yres - image->height;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800361 } else if (rotate == FB_ROTATE_CW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800362 fb_rotate_logo_cw(image->data, dst, image->width,
363 image->height);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800364 tmp = image->width;
365 image->width = image->height;
366 image->height = tmp;
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700367 image->dx = info->var.xres - image->width;
368 } else if (rotate == FB_ROTATE_CCW) {
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800369 fb_rotate_logo_ccw(image->data, dst, image->width,
370 image->height);
Antonino A. Daplasf837e6f2006-06-26 00:26:56 -0700371 tmp = image->width;
372 image->width = image->height;
373 image->height = tmp;
374 image->dy = info->var.yres - image->height;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800375 }
376
377 image->data = dst;
378}
379
380static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
381 int rotate)
382{
383 int x;
384
385 if (rotate == FB_ROTATE_UR) {
386 for (x = 0; x < num_online_cpus() &&
387 x * (fb_logo.logo->width + 8) <=
388 info->var.xres - fb_logo.logo->width; x++) {
389 info->fbops->fb_imageblit(info, image);
390 image->dx += fb_logo.logo->width + 8;
391 }
392 } else if (rotate == FB_ROTATE_UD) {
393 for (x = 0; x < num_online_cpus() &&
394 x * (fb_logo.logo->width + 8) <=
395 info->var.xres - fb_logo.logo->width; x++) {
396 info->fbops->fb_imageblit(info, image);
397 image->dx -= fb_logo.logo->width + 8;
398 }
399 } else if (rotate == FB_ROTATE_CW) {
400 for (x = 0; x < num_online_cpus() &&
401 x * (fb_logo.logo->width + 8) <=
402 info->var.yres - fb_logo.logo->width; x++) {
403 info->fbops->fb_imageblit(info, image);
404 image->dy += fb_logo.logo->width + 8;
405 }
406 } else if (rotate == FB_ROTATE_CCW) {
407 for (x = 0; x < num_online_cpus() &&
408 x * (fb_logo.logo->width + 8) <=
409 info->var.yres - fb_logo.logo->width; x++) {
410 info->fbops->fb_imageblit(info, image);
411 image->dy -= fb_logo.logo->width + 8;
412 }
413 }
414}
415
416int fb_prepare_logo(struct fb_info *info, int rotate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417{
Antonino A. Daplasb8c90942005-09-09 13:04:37 -0700418 int depth = fb_get_color_depth(&info->var, &info->fix);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800419 int yres;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
421 memset(&fb_logo, 0, sizeof(struct logo_data));
422
423 if (info->flags & FBINFO_MISC_TILEBLITTING)
424 return 0;
425
426 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
427 depth = info->var.blue.length;
428 if (info->var.red.length < depth)
429 depth = info->var.red.length;
430 if (info->var.green.length < depth)
431 depth = info->var.green.length;
432 }
433
Antonino A. Daplas0c683db2006-06-26 00:26:36 -0700434 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
Antonino A. Daplas397eeab2006-04-10 22:55:49 -0700435 /* assume console colormap */
436 depth = 4;
437 }
438
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 if (depth >= 8) {
440 switch (info->fix.visual) {
441 case FB_VISUAL_TRUECOLOR:
442 fb_logo.needs_truepalette = 1;
443 break;
444 case FB_VISUAL_DIRECTCOLOR:
445 fb_logo.needs_directpalette = 1;
446 fb_logo.needs_cmapreset = 1;
447 break;
448 case FB_VISUAL_PSEUDOCOLOR:
449 fb_logo.needs_cmapreset = 1;
450 break;
451 }
452 }
453
454 /* Return if no suitable logo was found */
455 fb_logo.logo = fb_find_logo(depth);
Jasper Spaans6d9885a2005-11-24 16:53:36 +0100456
457 if (!fb_logo.logo) {
458 return 0;
459 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800461 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
462 yres = info->var.yres;
463 else
464 yres = info->var.xres;
465
Jasper Spaans6d9885a2005-11-24 16:53:36 +0100466 if (fb_logo.logo->height > yres) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467 fb_logo.logo = NULL;
468 return 0;
469 }
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800470
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 /* What depth we asked for might be different from what we get */
472 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
473 fb_logo.depth = 8;
474 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
475 fb_logo.depth = 4;
476 else
477 fb_logo.depth = 1;
478 return fb_logo.logo->height;
479}
480
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800481int fb_show_logo(struct fb_info *info, int rotate)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482{
483 u32 *palette = NULL, *saved_pseudo_palette = NULL;
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800484 unsigned char *logo_new = NULL, *logo_rotate = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 struct fb_image image;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486
487 /* Return if the frame buffer is not mapped or suspended */
488 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
489 return 0;
490
491 image.depth = 8;
492 image.data = fb_logo.logo->data;
493
494 if (fb_logo.needs_cmapreset)
495 fb_set_logocmap(info, fb_logo.logo);
496
497 if (fb_logo.needs_truepalette ||
498 fb_logo.needs_directpalette) {
499 palette = kmalloc(256 * 4, GFP_KERNEL);
500 if (palette == NULL)
501 return 0;
502
503 if (fb_logo.needs_truepalette)
504 fb_set_logo_truepalette(info, fb_logo.logo, palette);
505 else
506 fb_set_logo_directpalette(info, fb_logo.logo, palette);
507
508 saved_pseudo_palette = info->pseudo_palette;
509 info->pseudo_palette = palette;
510 }
511
512 if (fb_logo.depth <= 4) {
513 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
514 GFP_KERNEL);
515 if (logo_new == NULL) {
516 kfree(palette);
517 if (saved_pseudo_palette)
518 info->pseudo_palette = saved_pseudo_palette;
519 return 0;
520 }
521 image.data = logo_new;
522 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
523 }
524
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800525 image.dx = 0;
526 image.dy = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 image.width = fb_logo.logo->width;
528 image.height = fb_logo.logo->height;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800530 if (rotate) {
531 logo_rotate = kmalloc(fb_logo.logo->width *
532 fb_logo.logo->height, GFP_KERNEL);
533 if (logo_rotate)
534 fb_rotate_logo(info, logo_rotate, &image, rotate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 }
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800536
537 fb_do_show_logo(info, &image, rotate);
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 kfree(palette);
540 if (saved_pseudo_palette != NULL)
541 info->pseudo_palette = saved_pseudo_palette;
542 kfree(logo_new);
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800543 kfree(logo_rotate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 return fb_logo.logo->height;
545}
546#else
Antonino A. Daplas9c44e5f2005-11-08 21:39:10 -0800547int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
548int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549#endif /* CONFIG_LOGO */
550
551static int fbmem_read_proc(char *buf, char **start, off_t offset,
552 int len, int *eof, void *private)
553{
554 struct fb_info **fi;
555 int clen;
556
557 clen = 0;
558 for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
559 if (*fi)
560 clen += sprintf(buf + clen, "%d %s\n",
561 (*fi)->node,
562 (*fi)->fix.id);
563 *start = buf + offset;
564 if (clen > offset)
565 clen -= offset;
566 else
567 clen = 0;
568 return clen < len ? clen : len;
569}
570
571static ssize_t
572fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
573{
574 unsigned long p = *ppos;
575 struct inode *inode = file->f_dentry->d_inode;
576 int fbidx = iminor(inode);
577 struct fb_info *info = registered_fb[fbidx];
578 u32 *buffer, *dst;
579 u32 __iomem *src;
580 int c, i, cnt = 0, err = 0;
581 unsigned long total_size;
582
583 if (!info || ! info->screen_base)
584 return -ENODEV;
585
586 if (info->state != FBINFO_STATE_RUNNING)
587 return -EPERM;
588
589 if (info->fbops->fb_read)
590 return info->fbops->fb_read(file, buf, count, ppos);
591
592 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800593
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 if (total_size == 0)
595 total_size = info->fix.smem_len;
596
597 if (p >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800598 return 0;
599
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 if (count >= total_size)
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800601 count = total_size;
602
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 if (count + p > total_size)
604 count = total_size - p;
605
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
607 GFP_KERNEL);
608 if (!buffer)
609 return -ENOMEM;
610
611 src = (u32 __iomem *) (info->screen_base + p);
612
613 if (info->fbops->fb_sync)
614 info->fbops->fb_sync(info);
615
616 while (count) {
617 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
618 dst = buffer;
619 for (i = c >> 2; i--; )
620 *dst++ = fb_readl(src++);
621 if (c & 3) {
622 u8 *dst8 = (u8 *) dst;
623 u8 __iomem *src8 = (u8 __iomem *) src;
624
625 for (i = c & 3; i--;)
626 *dst8++ = fb_readb(src8++);
627
628 src = (u32 __iomem *) src8;
629 }
630
631 if (copy_to_user(buf, buffer, c)) {
632 err = -EFAULT;
633 break;
634 }
635 *ppos += c;
636 buf += c;
637 cnt += c;
638 count -= c;
639 }
640
641 kfree(buffer);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 return (err) ? err : cnt;
644}
645
646static ssize_t
647fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
648{
649 unsigned long p = *ppos;
650 struct inode *inode = file->f_dentry->d_inode;
651 int fbidx = iminor(inode);
652 struct fb_info *info = registered_fb[fbidx];
653 u32 *buffer, *src;
654 u32 __iomem *dst;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800655 int c, i, cnt = 0, err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 unsigned long total_size;
657
658 if (!info || !info->screen_base)
659 return -ENODEV;
660
661 if (info->state != FBINFO_STATE_RUNNING)
662 return -EPERM;
663
664 if (info->fbops->fb_write)
665 return info->fbops->fb_write(file, buf, count, ppos);
666
667 total_size = info->screen_size;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800668
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 if (total_size == 0)
670 total_size = info->fix.smem_len;
671
672 if (p > total_size)
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700673 return -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800674
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700675 if (count > total_size) {
676 err = -EFBIG;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800677 count = total_size;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700678 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800679
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700680 if (count + p > total_size) {
681 if (!err)
682 err = -ENOSPC;
683
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800684 count = total_size - p;
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700685 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800686
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
688 GFP_KERNEL);
689 if (!buffer)
690 return -ENOMEM;
691
692 dst = (u32 __iomem *) (info->screen_base + p);
693
694 if (info->fbops->fb_sync)
695 info->fbops->fb_sync(info);
696
697 while (count) {
698 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
699 src = buffer;
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 if (copy_from_user(src, buf, c)) {
702 err = -EFAULT;
703 break;
704 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706 for (i = c >> 2; i--; )
707 fb_writel(*src++, dst++);
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800708
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 if (c & 3) {
710 u8 *src8 = (u8 *) src;
711 u8 __iomem *dst8 = (u8 __iomem *) dst;
712
713 for (i = c & 3; i--; )
714 fb_writeb(*src8++, dst8++);
715
716 dst = (u32 __iomem *) dst8;
717 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800718
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 *ppos += c;
720 buf += c;
721 cnt += c;
722 count -= c;
723 }
Antonino A. Daplas0a484a32006-01-09 20:53:37 -0800724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 kfree(buffer);
726
Antonino A. Daplas6a2a8862006-04-18 22:22:12 -0700727 return (cnt) ? cnt : err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728}
729
730#ifdef CONFIG_KMOD
731static void try_to_load(int fb)
732{
733 request_module("fb%d", fb);
734}
735#endif /* CONFIG_KMOD */
736
737int
738fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
739{
Antonino A. Daplas12070692005-12-12 22:17:17 -0800740 struct fb_fix_screeninfo *fix = &info->fix;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 int xoffset = var->xoffset;
742 int yoffset = var->yoffset;
Antonino A. Daplas12070692005-12-12 22:17:17 -0800743 int err = 0, yres = info->var.yres;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
Antonino A. Daplas12070692005-12-12 22:17:17 -0800745 if (var->yoffset > 0) {
746 if (var->vmode & FB_VMODE_YWRAP) {
747 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
748 err = -EINVAL;
749 else
750 yres = 0;
751 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
752 err = -EINVAL;
753 }
754
755 if (var->xoffset > 0 && (!fix->xpanstep ||
756 (var->xoffset % fix->xpanstep)))
757 err = -EINVAL;
758
759 if (err || !info->fbops->fb_pan_display || xoffset < 0 ||
760 yoffset < 0 || var->yoffset + yres > info->var.yres_virtual ||
761 var->xoffset + info->var.xres > info->var.xres_virtual)
762 return -EINVAL;
763
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 if ((err = info->fbops->fb_pan_display(var, info)))
765 return err;
766 info->var.xoffset = var->xoffset;
767 info->var.yoffset = var->yoffset;
768 if (var->vmode & FB_VMODE_YWRAP)
769 info->var.vmode |= FB_VMODE_YWRAP;
770 else
771 info->var.vmode &= ~FB_VMODE_YWRAP;
772 return 0;
773}
774
775int
776fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
777{
Antonino A. Daplas3edea482005-08-15 21:29:11 +0800778 int err, flags = info->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779
780 if (var->activate & FB_ACTIVATE_INV_MODE) {
781 struct fb_videomode mode1, mode2;
782 int ret = 0;
783
784 fb_var_to_videomode(&mode1, var);
785 fb_var_to_videomode(&mode2, &info->var);
786 /* make sure we don't delete the videomode of current var */
787 ret = fb_mode_is_equal(&mode1, &mode2);
788
789 if (!ret) {
790 struct fb_event event;
791
792 event.info = info;
793 event.data = &mode1;
Alan Sterne041c682006-03-27 01:16:30 -0800794 ret = blocking_notifier_call_chain(&fb_notifier_list,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 FB_EVENT_MODE_DELETE, &event);
796 }
797
798 if (!ret)
799 fb_delete_videomode(&mode1, &info->modelist);
800
801 return ret;
802 }
803
804 if ((var->activate & FB_ACTIVATE_FORCE) ||
805 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
806 if (!info->fbops->fb_check_var) {
807 *var = info->var;
808 return 0;
809 }
810
811 if ((err = info->fbops->fb_check_var(var, info)))
812 return err;
813
814 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
815 struct fb_videomode mode;
816 int err = 0;
817
818 info->var = *var;
819 if (info->fbops->fb_set_par)
820 info->fbops->fb_set_par(info);
821
822 fb_pan_display(info, &info->var);
823
824 fb_set_cmap(&info->cmap, info);
825
826 fb_var_to_videomode(&mode, &info->var);
827
828 if (info->modelist.prev && info->modelist.next &&
829 !list_empty(&info->modelist))
830 err = fb_add_videomode(&mode, &info->modelist);
831
Antonino A. Daplas3edea482005-08-15 21:29:11 +0800832 if (!err && (flags & FBINFO_MISC_USEREVENT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 struct fb_event event;
Antonino A. Daplas7726e9e2005-09-09 13:04:29 -0700834 int evnt = (var->activate & FB_ACTIVATE_ALL) ?
835 FB_EVENT_MODE_CHANGE_ALL :
836 FB_EVENT_MODE_CHANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837
838 info->flags &= ~FBINFO_MISC_USEREVENT;
839 event.info = info;
Alan Sterne041c682006-03-27 01:16:30 -0800840 blocking_notifier_call_chain(&fb_notifier_list,
841 evnt, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 }
843 }
844 }
845 return 0;
846}
847
848int
849fb_blank(struct fb_info *info, int blank)
850{
851 int ret = -EINVAL;
852
853 if (blank > FB_BLANK_POWERDOWN)
854 blank = FB_BLANK_POWERDOWN;
855
856 if (info->fbops->fb_blank)
857 ret = info->fbops->fb_blank(blank, info);
858
859 if (!ret) {
860 struct fb_event event;
861
862 event.info = info;
863 event.data = &blank;
Alan Sterne041c682006-03-27 01:16:30 -0800864 blocking_notifier_call_chain(&fb_notifier_list,
865 FB_EVENT_BLANK, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 }
867
868 return ret;
869}
870
871static int
872fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
873 unsigned long arg)
874{
875 int fbidx = iminor(inode);
876 struct fb_info *info = registered_fb[fbidx];
877 struct fb_ops *fb = info->fbops;
878 struct fb_var_screeninfo var;
879 struct fb_fix_screeninfo fix;
880 struct fb_con2fbmap con2fb;
881 struct fb_cmap_user cmap;
882 struct fb_event event;
883 void __user *argp = (void __user *)arg;
884 int i;
885
886 if (!fb)
887 return -ENODEV;
888 switch (cmd) {
889 case FBIOGET_VSCREENINFO:
890 return copy_to_user(argp, &info->var,
891 sizeof(var)) ? -EFAULT : 0;
892 case FBIOPUT_VSCREENINFO:
893 if (copy_from_user(&var, argp, sizeof(var)))
894 return -EFAULT;
895 acquire_console_sem();
896 info->flags |= FBINFO_MISC_USEREVENT;
897 i = fb_set_var(info, &var);
898 info->flags &= ~FBINFO_MISC_USEREVENT;
899 release_console_sem();
900 if (i) return i;
901 if (copy_to_user(argp, &var, sizeof(var)))
902 return -EFAULT;
903 return 0;
904 case FBIOGET_FSCREENINFO:
905 return copy_to_user(argp, &info->fix,
906 sizeof(fix)) ? -EFAULT : 0;
907 case FBIOPUTCMAP:
908 if (copy_from_user(&cmap, argp, sizeof(cmap)))
909 return -EFAULT;
910 return (fb_set_user_cmap(&cmap, info));
911 case FBIOGETCMAP:
912 if (copy_from_user(&cmap, argp, sizeof(cmap)))
913 return -EFAULT;
914 return fb_cmap_to_user(&info->cmap, &cmap);
915 case FBIOPAN_DISPLAY:
916 if (copy_from_user(&var, argp, sizeof(var)))
917 return -EFAULT;
918 acquire_console_sem();
919 i = fb_pan_display(info, &var);
920 release_console_sem();
921 if (i)
922 return i;
923 if (copy_to_user(argp, &var, sizeof(var)))
924 return -EFAULT;
925 return 0;
926 case FBIO_CURSOR:
927 return -EINVAL;
928 case FBIOGET_CON2FBMAP:
929 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
930 return -EFAULT;
931 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
932 return -EINVAL;
933 con2fb.framebuffer = -1;
934 event.info = info;
935 event.data = &con2fb;
Alan Sterne041c682006-03-27 01:16:30 -0800936 blocking_notifier_call_chain(&fb_notifier_list,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 FB_EVENT_GET_CONSOLE_MAP, &event);
938 return copy_to_user(argp, &con2fb,
939 sizeof(con2fb)) ? -EFAULT : 0;
940 case FBIOPUT_CON2FBMAP:
941 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
942 return - EFAULT;
943 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
944 return -EINVAL;
945 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
946 return -EINVAL;
947#ifdef CONFIG_KMOD
948 if (!registered_fb[con2fb.framebuffer])
949 try_to_load(con2fb.framebuffer);
950#endif /* CONFIG_KMOD */
951 if (!registered_fb[con2fb.framebuffer])
952 return -EINVAL;
953 event.info = info;
954 event.data = &con2fb;
Alan Sterne041c682006-03-27 01:16:30 -0800955 return blocking_notifier_call_chain(&fb_notifier_list,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700956 FB_EVENT_SET_CONSOLE_MAP,
957 &event);
958 case FBIOBLANK:
959 acquire_console_sem();
960 info->flags |= FBINFO_MISC_USEREVENT;
961 i = fb_blank(info, arg);
962 info->flags &= ~FBINFO_MISC_USEREVENT;
963 release_console_sem();
964 return i;
965 default:
966 if (fb->fb_ioctl == NULL)
967 return -EINVAL;
Christoph Hellwig67a66802006-01-14 13:21:25 -0800968 return fb->fb_ioctl(info, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969 }
970}
971
972#ifdef CONFIG_COMPAT
Arnd Bergmannc7f82d92005-11-08 21:39:19 -0800973struct fb_fix_screeninfo32 {
974 char id[16];
975 compat_caddr_t smem_start;
976 u32 smem_len;
977 u32 type;
978 u32 type_aux;
979 u32 visual;
980 u16 xpanstep;
981 u16 ypanstep;
982 u16 ywrapstep;
983 u32 line_length;
984 compat_caddr_t mmio_start;
985 u32 mmio_len;
986 u32 accel;
987 u16 reserved[3];
988};
989
990struct fb_cmap32 {
991 u32 start;
992 u32 len;
993 compat_caddr_t red;
994 compat_caddr_t green;
995 compat_caddr_t blue;
996 compat_caddr_t transp;
997};
998
999static int fb_getput_cmap(struct inode *inode, struct file *file,
1000 unsigned int cmd, unsigned long arg)
1001{
1002 struct fb_cmap_user __user *cmap;
1003 struct fb_cmap32 __user *cmap32;
1004 __u32 data;
1005 int err;
1006
1007 cmap = compat_alloc_user_space(sizeof(*cmap));
1008 cmap32 = compat_ptr(arg);
1009
1010 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1011 return -EFAULT;
1012
1013 if (get_user(data, &cmap32->red) ||
1014 put_user(compat_ptr(data), &cmap->red) ||
1015 get_user(data, &cmap32->green) ||
1016 put_user(compat_ptr(data), &cmap->green) ||
1017 get_user(data, &cmap32->blue) ||
1018 put_user(compat_ptr(data), &cmap->blue) ||
1019 get_user(data, &cmap32->transp) ||
1020 put_user(compat_ptr(data), &cmap->transp))
1021 return -EFAULT;
1022
1023 err = fb_ioctl(inode, file, cmd, (unsigned long) cmap);
1024
1025 if (!err) {
1026 if (copy_in_user(&cmap32->start,
1027 &cmap->start,
1028 2 * sizeof(__u32)))
1029 err = -EFAULT;
1030 }
1031 return err;
1032}
1033
1034static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1035 struct fb_fix_screeninfo32 __user *fix32)
1036{
1037 __u32 data;
1038 int err;
1039
1040 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1041
1042 data = (__u32) (unsigned long) fix->smem_start;
1043 err |= put_user(data, &fix32->smem_start);
1044
1045 err |= put_user(fix->smem_len, &fix32->smem_len);
1046 err |= put_user(fix->type, &fix32->type);
1047 err |= put_user(fix->type_aux, &fix32->type_aux);
1048 err |= put_user(fix->visual, &fix32->visual);
1049 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1050 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1051 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1052 err |= put_user(fix->line_length, &fix32->line_length);
1053
1054 data = (__u32) (unsigned long) fix->mmio_start;
1055 err |= put_user(data, &fix32->mmio_start);
1056
1057 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1058 err |= put_user(fix->accel, &fix32->accel);
1059 err |= copy_to_user(fix32->reserved, fix->reserved,
1060 sizeof(fix->reserved));
1061
1062 return err;
1063}
1064
1065static int fb_get_fscreeninfo(struct inode *inode, struct file *file,
1066 unsigned int cmd, unsigned long arg)
1067{
1068 mm_segment_t old_fs;
1069 struct fb_fix_screeninfo fix;
1070 struct fb_fix_screeninfo32 __user *fix32;
1071 int err;
1072
1073 fix32 = compat_ptr(arg);
1074
1075 old_fs = get_fs();
1076 set_fs(KERNEL_DS);
1077 err = fb_ioctl(inode, file, cmd, (unsigned long) &fix);
1078 set_fs(old_fs);
1079
1080 if (!err)
1081 err = do_fscreeninfo_to_user(&fix, fix32);
1082
1083 return err;
1084}
1085
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086static long
1087fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1088{
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001089 struct inode *inode = file->f_dentry->d_inode;
1090 int fbidx = iminor(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 struct fb_info *info = registered_fb[fbidx];
1092 struct fb_ops *fb = info->fbops;
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001093 long ret = -ENOIOCTLCMD;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 lock_kernel();
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001096 switch(cmd) {
1097 case FBIOGET_VSCREENINFO:
1098 case FBIOPUT_VSCREENINFO:
1099 case FBIOPAN_DISPLAY:
1100 case FBIOGET_CON2FBMAP:
1101 case FBIOPUT_CON2FBMAP:
1102 arg = (unsigned long) compat_ptr(arg);
1103 case FBIOBLANK:
1104 ret = fb_ioctl(inode, file, cmd, arg);
1105 break;
1106
1107 case FBIOGET_FSCREENINFO:
1108 ret = fb_get_fscreeninfo(inode, file, cmd, arg);
1109 break;
1110
1111 case FBIOGETCMAP:
1112 case FBIOPUTCMAP:
1113 ret = fb_getput_cmap(inode, file, cmd, arg);
1114 break;
1115
1116 default:
1117 if (fb->fb_compat_ioctl)
Christoph Hellwig67a66802006-01-14 13:21:25 -08001118 ret = fb->fb_compat_ioctl(info, cmd, arg);
Arnd Bergmannc7f82d92005-11-08 21:39:19 -08001119 break;
1120 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 unlock_kernel();
1122 return ret;
1123}
1124#endif
1125
1126static int
1127fb_mmap(struct file *file, struct vm_area_struct * vma)
1128{
1129 int fbidx = iminor(file->f_dentry->d_inode);
1130 struct fb_info *info = registered_fb[fbidx];
1131 struct fb_ops *fb = info->fbops;
1132 unsigned long off;
1133#if !defined(__sparc__) || defined(__sparc_v9__)
1134 unsigned long start;
1135 u32 len;
1136#endif
1137
1138 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1139 return -EINVAL;
1140 off = vma->vm_pgoff << PAGE_SHIFT;
1141 if (!fb)
1142 return -ENODEV;
1143 if (fb->fb_mmap) {
1144 int res;
1145 lock_kernel();
Christoph Hellwig216d5262006-01-14 13:21:25 -08001146 res = fb->fb_mmap(info, vma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 unlock_kernel();
1148 return res;
1149 }
1150
1151#if defined(__sparc__) && !defined(__sparc_v9__)
1152 /* Should never get here, all fb drivers should have their own
1153 mmap routines */
1154 return -EINVAL;
1155#else
1156 /* !sparc32... */
1157 lock_kernel();
1158
1159 /* frame buffer memory */
1160 start = info->fix.smem_start;
1161 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1162 if (off >= len) {
1163 /* memory mapped io */
1164 off -= len;
1165 if (info->var.accel_flags) {
1166 unlock_kernel();
1167 return -EINVAL;
1168 }
1169 start = info->fix.mmio_start;
1170 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1171 }
1172 unlock_kernel();
1173 start &= PAGE_MASK;
1174 if ((vma->vm_end - vma->vm_start + off) > len)
1175 return -EINVAL;
1176 off += start;
1177 vma->vm_pgoff = off >> PAGE_SHIFT;
1178 /* This is an IO map - tell maydump to skip this VMA */
1179 vma->vm_flags |= VM_IO | VM_RESERVED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001180#if defined(__mc68000__)
1181#if defined(CONFIG_SUN3)
1182 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1183#elif defined(CONFIG_MMU)
1184 if (CPU_IS_020_OR_030)
1185 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1186 if (CPU_IS_040_OR_060) {
1187 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1188 /* Use no-cache mode, serialized */
1189 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1190 }
1191#endif
1192#elif defined(__powerpc__)
Roland Dreier8b150472005-10-28 17:46:18 -07001193 vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 vma->vm_end - vma->vm_start,
1195 vma->vm_page_prot);
1196#elif defined(__alpha__)
1197 /* Caching is off in the I/O space quadrant by design. */
1198#elif defined(__i386__) || defined(__x86_64__)
1199 if (boot_cpu_data.x86 > 3)
1200 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
David S. Miller14778d92006-03-21 02:29:39 -08001201#elif defined(__mips__) || defined(__sparc_v9__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1203#elif defined(__hppa__)
1204 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1205#elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
1206 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1207#elif defined(__ia64__)
1208 if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
1209 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1210 else
1211 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1212#else
1213#warning What do we have to do here??
1214#endif
1215 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1216 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1217 return -EAGAIN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001218 return 0;
1219#endif /* !sparc32 */
1220}
1221
1222static int
1223fb_open(struct inode *inode, struct file *file)
1224{
1225 int fbidx = iminor(inode);
1226 struct fb_info *info;
1227 int res = 0;
1228
1229 if (fbidx >= FB_MAX)
1230 return -ENODEV;
1231#ifdef CONFIG_KMOD
1232 if (!(info = registered_fb[fbidx]))
1233 try_to_load(fbidx);
1234#endif /* CONFIG_KMOD */
1235 if (!(info = registered_fb[fbidx]))
1236 return -ENODEV;
1237 if (!try_module_get(info->fbops->owner))
1238 return -ENODEV;
Thomas Koellercae8a122006-01-09 20:53:48 -08001239 file->private_data = info;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240 if (info->fbops->fb_open) {
1241 res = info->fbops->fb_open(info,1);
1242 if (res)
1243 module_put(info->fbops->owner);
1244 }
1245 return res;
1246}
1247
1248static int
1249fb_release(struct inode *inode, struct file *file)
1250{
Thomas Koellercae8a122006-01-09 20:53:48 -08001251 struct fb_info * const info = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252
1253 lock_kernel();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001254 if (info->fbops->fb_release)
1255 info->fbops->fb_release(info,1);
1256 module_put(info->fbops->owner);
1257 unlock_kernel();
1258 return 0;
1259}
1260
1261static struct file_operations fb_fops = {
1262 .owner = THIS_MODULE,
1263 .read = fb_read,
1264 .write = fb_write,
1265 .ioctl = fb_ioctl,
1266#ifdef CONFIG_COMPAT
1267 .compat_ioctl = fb_compat_ioctl,
1268#endif
1269 .mmap = fb_mmap,
1270 .open = fb_open,
1271 .release = fb_release,
1272#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1273 .get_unmapped_area = get_fb_unmapped_area,
1274#endif
1275};
1276
Antonino A. Daplas9a179172006-06-26 00:27:05 -07001277struct class *fb_class;
1278EXPORT_SYMBOL(fb_class);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279/**
1280 * register_framebuffer - registers a frame buffer device
1281 * @fb_info: frame buffer info structure
1282 *
1283 * Registers a frame buffer device @fb_info.
1284 *
1285 * Returns negative errno on error, or zero for success.
1286 *
1287 */
1288
1289int
1290register_framebuffer(struct fb_info *fb_info)
1291{
1292 int i;
1293 struct fb_event event;
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001294 struct fb_videomode mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295
1296 if (num_registered_fb == FB_MAX)
1297 return -ENXIO;
1298 num_registered_fb++;
1299 for (i = 0 ; i < FB_MAX; i++)
1300 if (!registered_fb[i])
1301 break;
1302 fb_info->node = i;
1303
Greg Kroah-Hartman53f46542005-10-27 22:25:43 -07001304 fb_info->class_device = class_device_create(fb_class, NULL, MKDEV(FB_MAJOR, i),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305 fb_info->device, "fb%d", i);
1306 if (IS_ERR(fb_info->class_device)) {
1307 /* Not fatal */
1308 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device));
1309 fb_info->class_device = NULL;
1310 } else
1311 fb_init_class_device(fb_info);
1312
1313 if (fb_info->pixmap.addr == NULL) {
1314 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1315 if (fb_info->pixmap.addr) {
1316 fb_info->pixmap.size = FBPIXMAPSIZE;
1317 fb_info->pixmap.buf_align = 1;
1318 fb_info->pixmap.scan_align = 1;
James Simmons58a60642005-06-21 17:17:08 -07001319 fb_info->pixmap.access_align = 32;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1321 }
1322 }
1323 fb_info->pixmap.offset = 0;
1324
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001325 if (!fb_info->modelist.prev || !fb_info->modelist.next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001326 INIT_LIST_HEAD(&fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327
Antonino A. Daplas96fe6a22005-09-09 13:09:58 -07001328 fb_var_to_videomode(&mode, &fb_info->var);
1329 fb_add_videomode(&mode, &fb_info->modelist);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001330 registered_fb[i] = fb_info;
1331
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 event.info = fb_info;
Alan Sterne041c682006-03-27 01:16:30 -08001333 blocking_notifier_call_chain(&fb_notifier_list,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001334 FB_EVENT_FB_REGISTERED, &event);
1335 return 0;
1336}
1337
1338
1339/**
1340 * unregister_framebuffer - releases a frame buffer device
1341 * @fb_info: frame buffer info structure
1342 *
1343 * Unregisters a frame buffer device @fb_info.
1344 *
1345 * Returns negative errno on error, or zero for success.
1346 *
1347 */
1348
1349int
1350unregister_framebuffer(struct fb_info *fb_info)
1351{
Antonino A. Daplase614b182006-06-26 00:27:09 -07001352 struct fb_event event;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001353 int i;
1354
1355 i = fb_info->node;
1356 if (!registered_fb[i])
1357 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358
Antonino A. Daplase614b182006-06-26 00:27:09 -07001359 if (fb_info->pixmap.addr &&
1360 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 kfree(fb_info->pixmap.addr);
1362 fb_destroy_modelist(&fb_info->modelist);
1363 registered_fb[i]=NULL;
1364 num_registered_fb--;
1365 fb_cleanup_class_device(fb_info);
gregkh@suse.de56b22932005-03-23 10:01:41 -08001366 class_device_destroy(fb_class, MKDEV(FB_MAJOR, i));
Antonino A. Daplase614b182006-06-26 00:27:09 -07001367 event.info = fb_info;
1368 blocking_notifier_call_chain(&fb_notifier_list,
1369 FB_EVENT_FB_UNREGISTERED, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370 return 0;
1371}
1372
1373/**
1374 * fb_register_client - register a client notifier
1375 * @nb: notifier block to callback on events
1376 */
1377int fb_register_client(struct notifier_block *nb)
1378{
Alan Sterne041c682006-03-27 01:16:30 -08001379 return blocking_notifier_chain_register(&fb_notifier_list, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001380}
1381
1382/**
1383 * fb_unregister_client - unregister a client notifier
1384 * @nb: notifier block to callback on events
1385 */
1386int fb_unregister_client(struct notifier_block *nb)
1387{
Alan Sterne041c682006-03-27 01:16:30 -08001388 return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001389}
1390
1391/**
1392 * fb_set_suspend - low level driver signals suspend
1393 * @info: framebuffer affected
1394 * @state: 0 = resuming, !=0 = suspending
1395 *
1396 * This is meant to be used by low level drivers to
1397 * signal suspend/resume to the core & clients.
1398 * It must be called with the console semaphore held
1399 */
1400void fb_set_suspend(struct fb_info *info, int state)
1401{
1402 struct fb_event event;
1403
1404 event.info = info;
1405 if (state) {
Alan Sterne041c682006-03-27 01:16:30 -08001406 blocking_notifier_call_chain(&fb_notifier_list,
1407 FB_EVENT_SUSPEND, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001408 info->state = FBINFO_STATE_SUSPENDED;
1409 } else {
1410 info->state = FBINFO_STATE_RUNNING;
Alan Sterne041c682006-03-27 01:16:30 -08001411 blocking_notifier_call_chain(&fb_notifier_list,
1412 FB_EVENT_RESUME, &event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001413 }
1414}
1415
1416/**
1417 * fbmem_init - init frame buffer subsystem
1418 *
1419 * Initialize the frame buffer subsystem.
1420 *
1421 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1422 *
1423 */
1424
1425static int __init
1426fbmem_init(void)
1427{
1428 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1429
Linus Torvalds1da177e2005-04-16 15:20:36 -07001430 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1431 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1432
gregkh@suse.de56b22932005-03-23 10:01:41 -08001433 fb_class = class_create(THIS_MODULE, "graphics");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 if (IS_ERR(fb_class)) {
1435 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1436 fb_class = NULL;
1437 }
1438 return 0;
1439}
1440
1441#ifdef MODULE
1442module_init(fbmem_init);
1443static void __exit
1444fbmem_exit(void)
1445{
gregkh@suse.de56b22932005-03-23 10:01:41 -08001446 class_destroy(fb_class);
Jon Smirl5a340cc2005-07-27 11:46:04 -07001447 unregister_chrdev(FB_MAJOR, "fb");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001448}
1449
1450module_exit(fbmem_exit);
1451MODULE_LICENSE("GPL");
1452MODULE_DESCRIPTION("Framebuffer base");
1453#else
1454subsys_initcall(fbmem_init);
1455#endif
1456
1457int fb_new_modelist(struct fb_info *info)
1458{
1459 struct fb_event event;
1460 struct fb_var_screeninfo var = info->var;
1461 struct list_head *pos, *n;
1462 struct fb_modelist *modelist;
1463 struct fb_videomode *m, mode;
1464 int err = 1;
1465
1466 list_for_each_safe(pos, n, &info->modelist) {
1467 modelist = list_entry(pos, struct fb_modelist, list);
1468 m = &modelist->mode;
1469 fb_videomode_to_var(&var, m);
1470 var.activate = FB_ACTIVATE_TEST;
1471 err = fb_set_var(info, &var);
1472 fb_var_to_videomode(&mode, &var);
1473 if (err || !fb_mode_is_equal(m, &mode)) {
1474 list_del(pos);
1475 kfree(pos);
1476 }
1477 }
1478
1479 err = 1;
1480
1481 if (!list_empty(&info->modelist)) {
1482 event.info = info;
Alan Sterne041c682006-03-27 01:16:30 -08001483 err = blocking_notifier_call_chain(&fb_notifier_list,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484 FB_EVENT_NEW_MODELIST,
1485 &event);
1486 }
1487
1488 return err;
1489}
1490
1491static char *video_options[FB_MAX];
1492static int ofonly;
1493
Pavel Pisa4dc3b162005-05-01 08:59:25 -07001494extern const char *global_mode_option;
1495
Linus Torvalds1da177e2005-04-16 15:20:36 -07001496/**
1497 * fb_get_options - get kernel boot parameters
1498 * @name: framebuffer name as it would appear in
1499 * the boot parameter line
1500 * (video=<name>:<options>)
1501 * @option: the option will be stored here
1502 *
1503 * NOTE: Needed to maintain backwards compatibility
1504 */
1505int fb_get_options(char *name, char **option)
1506{
1507 char *opt, *options = NULL;
1508 int opt_len, retval = 0;
1509 int name_len = strlen(name), i;
1510
1511 if (name_len && ofonly && strncmp(name, "offb", 4))
1512 retval = 1;
1513
1514 if (name_len && !retval) {
1515 for (i = 0; i < FB_MAX; i++) {
1516 if (video_options[i] == NULL)
1517 continue;
1518 opt_len = strlen(video_options[i]);
1519 if (!opt_len)
1520 continue;
1521 opt = video_options[i];
1522 if (!strncmp(name, opt, name_len) &&
1523 opt[name_len] == ':')
1524 options = opt + name_len + 1;
1525 }
1526 }
1527 if (options && !strncmp(options, "off", 3))
1528 retval = 1;
1529
1530 if (option)
1531 *option = options;
1532
1533 return retval;
1534}
1535
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001536#ifndef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537/**
1538 * video_setup - process command line options
1539 * @options: string of options
1540 *
1541 * Process command line options for frame buffer subsystem.
1542 *
1543 * NOTE: This function is a __setup and __init function.
1544 * It only stores the options. Drivers have to call
1545 * fb_get_options() as necessary.
1546 *
1547 * Returns zero.
1548 *
1549 */
Adrian Bunk75c96f82005-05-05 16:16:09 -07001550static int __init video_setup(char *options)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551{
1552 int i, global = 0;
1553
1554 if (!options || !*options)
1555 global = 1;
1556
1557 if (!global && !strncmp(options, "ofonly", 6)) {
1558 ofonly = 1;
1559 global = 1;
1560 }
1561
1562 if (!global && !strstr(options, "fb:")) {
1563 global_mode_option = options;
1564 global = 1;
1565 }
1566
1567 if (!global) {
1568 for (i = 0; i < FB_MAX; i++) {
1569 if (video_options[i] == NULL) {
1570 video_options[i] = options;
1571 break;
1572 }
1573
1574 }
1575 }
1576
OGAWA Hirofumi9b410462006-03-31 02:30:33 -08001577 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578}
1579__setup("video=", video_setup);
Andrew Mortonbc6d7fd2006-02-11 17:56:08 -08001580#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
1582 /*
1583 * Visible symbols for modules
1584 */
1585
1586EXPORT_SYMBOL(register_framebuffer);
1587EXPORT_SYMBOL(unregister_framebuffer);
1588EXPORT_SYMBOL(num_registered_fb);
1589EXPORT_SYMBOL(registered_fb);
1590EXPORT_SYMBOL(fb_prepare_logo);
1591EXPORT_SYMBOL(fb_show_logo);
1592EXPORT_SYMBOL(fb_set_var);
1593EXPORT_SYMBOL(fb_blank);
1594EXPORT_SYMBOL(fb_pan_display);
1595EXPORT_SYMBOL(fb_get_buffer_offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596EXPORT_SYMBOL(fb_set_suspend);
1597EXPORT_SYMBOL(fb_register_client);
1598EXPORT_SYMBOL(fb_unregister_client);
1599EXPORT_SYMBOL(fb_get_options);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600
1601MODULE_LICENSE("GPL");