Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/drivers/video/fbmem.c | |
3 | * | |
4 | * Copyright (C) 1994 Martin Schaller | |
5 | * | |
6 | * 2001 - Documented with DocBook | |
7 | * - Brad Douglas <brad@neruo.com> | |
8 | * | |
9 | * This file is subject to the terms and conditions of the GNU General Public | |
10 | * License. See the file COPYING in the main directory of this archive | |
11 | * for more details. | |
12 | */ | |
13 | ||
1da177e4 LT |
14 | #include <linux/module.h> |
15 | ||
c7f82d9c | 16 | #include <linux/compat.h> |
1da177e4 LT |
17 | #include <linux/types.h> |
18 | #include <linux/errno.h> | |
1da177e4 LT |
19 | #include <linux/kernel.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/mman.h> | |
a8f340e3 | 24 | #include <linux/vt.h> |
1da177e4 LT |
25 | #include <linux/init.h> |
26 | #include <linux/linux_logo.h> | |
27 | #include <linux/proc_fs.h> | |
27599aac | 28 | #include <linux/platform_device.h> |
0aa16341 | 29 | #include <linux/seq_file.h> |
1da177e4 | 30 | #include <linux/console.h> |
1da177e4 | 31 | #include <linux/kmod.h> |
1da177e4 | 32 | #include <linux/err.h> |
1da177e4 LT |
33 | #include <linux/device.h> |
34 | #include <linux/efi.h> | |
10eb2659 | 35 | #include <linux/fb.h> |
6104c370 | 36 | #include <linux/fbcon.h> |
95cf9264 | 37 | #include <linux/mem_encrypt.h> |
4d18975c | 38 | #include <linux/pci.h> |
1da177e4 | 39 | |
10eb2659 | 40 | #include <asm/fb.h> |
1da177e4 | 41 | |
0ba2fa8c | 42 | #include <video/nomodeset.h> |
4652905f | 43 | #include <video/vga.h> |
1da177e4 LT |
44 | |
45 | /* | |
46 | * Frame buffer device initialization and setup routines | |
47 | */ | |
48 | ||
49 | #define FBPIXMAPSIZE (1024 * 8) | |
50 | ||
698b3682 | 51 | static DEFINE_MUTEX(registration_lock); |
9c29fba1 | 52 | |
0128beee HD |
53 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
54 | int num_registered_fb __read_mostly; | |
5727dcfd DV |
55 | #define for_each_registered_fb(i) \ |
56 | for (i = 0; i < FB_MAX; i++) \ | |
57 | if (!registered_fb[i]) {} else | |
1da177e4 | 58 | |
890d14d2 | 59 | bool fb_center_logo __read_mostly; |
890d14d2 | 60 | |
691f50ab PR |
61 | int fb_logo_count __read_mostly = -1; |
62 | ||
698b3682 LT |
63 | static struct fb_info *get_fb_info(unsigned int idx) |
64 | { | |
65 | struct fb_info *fb_info; | |
66 | ||
67 | if (idx >= FB_MAX) | |
68 | return ERR_PTR(-ENODEV); | |
69 | ||
70 | mutex_lock(®istration_lock); | |
71 | fb_info = registered_fb[idx]; | |
72 | if (fb_info) | |
0189cb57 | 73 | refcount_inc(&fb_info->count); |
698b3682 LT |
74 | mutex_unlock(®istration_lock); |
75 | ||
76 | return fb_info; | |
77 | } | |
78 | ||
79 | static void put_fb_info(struct fb_info *fb_info) | |
80 | { | |
0189cb57 | 81 | if (!refcount_dec_and_test(&fb_info->count)) |
698b3682 LT |
82 | return; |
83 | if (fb_info->fbops->fb_destroy) | |
84 | fb_info->fbops->fb_destroy(fb_info); | |
85 | } | |
86 | ||
1da177e4 LT |
87 | /* |
88 | * Helpers | |
89 | */ | |
90 | ||
b8c90945 AD |
91 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
92 | struct fb_fix_screeninfo *fix) | |
1da177e4 | 93 | { |
b8c90945 AD |
94 | int depth = 0; |
95 | ||
96 | if (fix->visual == FB_VISUAL_MONO01 || | |
97 | fix->visual == FB_VISUAL_MONO10) | |
98 | depth = 1; | |
99 | else { | |
100 | if (var->green.length == var->blue.length && | |
101 | var->green.length == var->red.length && | |
102 | var->green.offset == var->blue.offset && | |
103 | var->green.offset == var->red.offset) | |
104 | depth = var->green.length; | |
105 | else | |
106 | depth = var->green.length + var->red.length + | |
107 | var->blue.length; | |
108 | } | |
109 | ||
110 | return depth; | |
1da177e4 LT |
111 | } |
112 | EXPORT_SYMBOL(fb_get_color_depth); | |
113 | ||
114 | /* | |
f5a9951c | 115 | * Data padding functions. |
1da177e4 | 116 | */ |
f1ab5dac | 117 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
1da177e4 | 118 | { |
829e79b6 | 119 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
1da177e4 | 120 | } |
f1ab5dac | 121 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
1da177e4 | 122 | |
f1ab5dac JS |
123 | void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, |
124 | u32 shift_high, u32 shift_low, u32 mod) | |
1da177e4 LT |
125 | { |
126 | u8 mask = (u8) (0xfff << shift_high), tmp; | |
127 | int i, j; | |
128 | ||
129 | for (i = height; i--; ) { | |
130 | for (j = 0; j < idx; j++) { | |
131 | tmp = dst[j]; | |
132 | tmp &= mask; | |
133 | tmp |= *src >> shift_low; | |
134 | dst[j] = tmp; | |
135 | tmp = *src << shift_high; | |
136 | dst[j+1] = tmp; | |
137 | src++; | |
138 | } | |
139 | tmp = dst[idx]; | |
140 | tmp &= mask; | |
141 | tmp |= *src >> shift_low; | |
142 | dst[idx] = tmp; | |
143 | if (shift_high < mod) { | |
144 | tmp = *src << shift_high; | |
145 | dst[idx+1] = tmp; | |
146 | } | |
147 | src++; | |
148 | dst += d_pitch; | |
149 | } | |
150 | } | |
f1ab5dac | 151 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
1da177e4 LT |
152 | |
153 | /* | |
154 | * we need to lock this section since fb_cursor | |
155 | * may use fb_imageblit() | |
156 | */ | |
157 | char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size) | |
158 | { | |
159 | u32 align = buf->buf_align - 1, offset; | |
160 | char *addr = buf->addr; | |
161 | ||
162 | /* If IO mapped, we need to sync before access, no sharing of | |
163 | * the pixmap is done | |
164 | */ | |
165 | if (buf->flags & FB_PIXMAP_IO) { | |
166 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
167 | info->fbops->fb_sync(info); | |
168 | return addr; | |
169 | } | |
170 | ||
171 | /* See if we fit in the remaining pixmap space */ | |
172 | offset = buf->offset + align; | |
173 | offset &= ~align; | |
174 | if (offset + size > buf->size) { | |
175 | /* We do not fit. In order to be able to re-use the buffer, | |
176 | * we must ensure no asynchronous DMA'ing or whatever operation | |
177 | * is in progress, we sync for that. | |
178 | */ | |
179 | if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC)) | |
180 | info->fbops->fb_sync(info); | |
181 | offset = 0; | |
182 | } | |
183 | buf->offset = offset + size; | |
184 | addr += offset; | |
185 | ||
186 | return addr; | |
187 | } | |
9c29fba1 | 188 | EXPORT_SYMBOL(fb_get_buffer_offset); |
1da177e4 LT |
189 | |
190 | #ifdef CONFIG_LOGO | |
1da177e4 LT |
191 | |
192 | static inline unsigned safe_shift(unsigned d, int n) | |
193 | { | |
194 | return n < 0 ? d >> -n : d << n; | |
195 | } | |
196 | ||
197 | static void fb_set_logocmap(struct fb_info *info, | |
198 | const struct linux_logo *logo) | |
199 | { | |
200 | struct fb_cmap palette_cmap; | |
201 | u16 palette_green[16]; | |
202 | u16 palette_blue[16]; | |
203 | u16 palette_red[16]; | |
204 | int i, j, n; | |
205 | const unsigned char *clut = logo->clut; | |
206 | ||
207 | palette_cmap.start = 0; | |
208 | palette_cmap.len = 16; | |
209 | palette_cmap.red = palette_red; | |
210 | palette_cmap.green = palette_green; | |
211 | palette_cmap.blue = palette_blue; | |
212 | palette_cmap.transp = NULL; | |
213 | ||
214 | for (i = 0; i < logo->clutsize; i += n) { | |
215 | n = logo->clutsize - i; | |
216 | /* palette_cmap provides space for only 16 colors at once */ | |
217 | if (n > 16) | |
218 | n = 16; | |
219 | palette_cmap.start = 32 + i; | |
220 | palette_cmap.len = n; | |
221 | for (j = 0; j < n; ++j) { | |
222 | palette_cmap.red[j] = clut[0] << 8 | clut[0]; | |
223 | palette_cmap.green[j] = clut[1] << 8 | clut[1]; | |
224 | palette_cmap.blue[j] = clut[2] << 8 | clut[2]; | |
225 | clut += 3; | |
226 | } | |
227 | fb_set_cmap(&palette_cmap, info); | |
228 | } | |
229 | } | |
230 | ||
231 | static void fb_set_logo_truepalette(struct fb_info *info, | |
232 | const struct linux_logo *logo, | |
233 | u32 *palette) | |
234 | { | |
0128beee | 235 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
1da177e4 LT |
236 | unsigned char redmask, greenmask, bluemask; |
237 | int redshift, greenshift, blueshift; | |
238 | int i; | |
239 | const unsigned char *clut = logo->clut; | |
240 | ||
241 | /* | |
242 | * We have to create a temporary palette since console palette is only | |
243 | * 16 colors long. | |
244 | */ | |
245 | /* Bug: Doesn't obey msb_right ... (who needs that?) */ | |
246 | redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8]; | |
247 | greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8]; | |
248 | bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8]; | |
249 | redshift = info->var.red.offset - (8 - info->var.red.length); | |
250 | greenshift = info->var.green.offset - (8 - info->var.green.length); | |
251 | blueshift = info->var.blue.offset - (8 - info->var.blue.length); | |
252 | ||
253 | for ( i = 0; i < logo->clutsize; i++) { | |
254 | palette[i+32] = (safe_shift((clut[0] & redmask), redshift) | | |
255 | safe_shift((clut[1] & greenmask), greenshift) | | |
256 | safe_shift((clut[2] & bluemask), blueshift)); | |
257 | clut += 3; | |
258 | } | |
259 | } | |
260 | ||
261 | static void fb_set_logo_directpalette(struct fb_info *info, | |
262 | const struct linux_logo *logo, | |
263 | u32 *palette) | |
264 | { | |
265 | int redshift, greenshift, blueshift; | |
266 | int i; | |
267 | ||
268 | redshift = info->var.red.offset; | |
269 | greenshift = info->var.green.offset; | |
270 | blueshift = info->var.blue.offset; | |
271 | ||
cf7ee554 | 272 | for (i = 32; i < 32 + logo->clutsize; i++) |
1da177e4 LT |
273 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
274 | } | |
275 | ||
276 | static void fb_set_logo(struct fb_info *info, | |
277 | const struct linux_logo *logo, u8 *dst, | |
278 | int depth) | |
279 | { | |
b8c90945 | 280 | int i, j, k; |
1da177e4 | 281 | const u8 *src = logo->data; |
b8c90945 AD |
282 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
283 | u8 fg = 1, d; | |
1da177e4 | 284 | |
1692b37c AD |
285 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
286 | case 1: | |
287 | fg = 1; | |
288 | break; | |
289 | case 2: | |
290 | fg = 3; | |
291 | break; | |
292 | default: | |
1da177e4 | 293 | fg = 7; |
1692b37c AD |
294 | break; |
295 | } | |
1da177e4 | 296 | |
b8c90945 AD |
297 | if (info->fix.visual == FB_VISUAL_MONO01 || |
298 | info->fix.visual == FB_VISUAL_MONO10) | |
299 | fg = ~((u8) (0xfff << info->var.green.length)); | |
300 | ||
1da177e4 LT |
301 | switch (depth) { |
302 | case 4: | |
303 | for (i = 0; i < logo->height; i++) | |
304 | for (j = 0; j < logo->width; src++) { | |
305 | *dst++ = *src >> 4; | |
306 | j++; | |
307 | if (j < logo->width) { | |
308 | *dst++ = *src & 0x0f; | |
309 | j++; | |
310 | } | |
311 | } | |
312 | break; | |
313 | case 1: | |
314 | for (i = 0; i < logo->height; i++) { | |
315 | for (j = 0; j < logo->width; src++) { | |
316 | d = *src ^ xor; | |
16622a8e | 317 | for (k = 7; k >= 0 && j < logo->width; k--) { |
1da177e4 LT |
318 | *dst++ = ((d >> k) & 1) ? fg : 0; |
319 | j++; | |
320 | } | |
321 | } | |
322 | } | |
323 | break; | |
324 | } | |
325 | } | |
326 | ||
327 | /* | |
328 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), | |
329 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on | |
330 | * the visual format and color depth of the framebuffer, the DAC, the | |
331 | * pseudo_palette, and the logo data will be adjusted accordingly. | |
332 | * | |
333 | * Case 1 - linux_logo_clut224: | |
334 | * Color exceeds the number of console colors (16), thus we set the hardware DAC | |
335 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. | |
336 | * | |
337 | * For visuals that require color info from the pseudo_palette, we also construct | |
338 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags | |
339 | * will be set. | |
340 | * | |
341 | * Case 2 - linux_logo_vga16: | |
342 | * The number of colors just matches the console colors, thus there is no need | |
343 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, | |
344 | * each byte contains color information for two pixels (upper and lower nibble). | |
345 | * To be consistent with fb_imageblit() usage, we therefore separate the two | |
346 | * nibbles into separate bytes. The "depth" flag will be set to 4. | |
347 | * | |
348 | * Case 3 - linux_logo_mono: | |
349 | * This is similar with Case 2. Each byte contains information for 8 pixels. | |
350 | * We isolate each bit and expand each into a byte. The "depth" flag will | |
351 | * be set to 1. | |
352 | */ | |
353 | static struct logo_data { | |
354 | int depth; | |
355 | int needs_directpalette; | |
356 | int needs_truepalette; | |
357 | int needs_cmapreset; | |
358 | const struct linux_logo *logo; | |
0128beee | 359 | } fb_logo __read_mostly; |
1da177e4 | 360 | |
9c44e5f6 AD |
361 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
362 | { | |
363 | u32 size = width * height, i; | |
364 | ||
365 | out += size - 1; | |
366 | ||
367 | for (i = size; i--; ) | |
368 | *out-- = *in++; | |
369 | } | |
370 | ||
371 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) | |
372 | { | |
f837e6f7 | 373 | int i, j, h = height - 1; |
9c44e5f6 AD |
374 | |
375 | for (i = 0; i < height; i++) | |
376 | for (j = 0; j < width; j++) | |
f837e6f7 | 377 | out[height * j + h - i] = *in++; |
9c44e5f6 AD |
378 | } |
379 | ||
380 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) | |
381 | { | |
382 | int i, j, w = width - 1; | |
383 | ||
384 | for (i = 0; i < height; i++) | |
385 | for (j = 0; j < width; j++) | |
386 | out[height * (w - j) + i] = *in++; | |
387 | } | |
388 | ||
389 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, | |
390 | struct fb_image *image, int rotate) | |
391 | { | |
392 | u32 tmp; | |
393 | ||
394 | if (rotate == FB_ROTATE_UD) { | |
9c44e5f6 AD |
395 | fb_rotate_logo_ud(image->data, dst, image->width, |
396 | image->height); | |
abed5d15 GU |
397 | image->dx = info->var.xres - image->width - image->dx; |
398 | image->dy = info->var.yres - image->height - image->dy; | |
9c44e5f6 | 399 | } else if (rotate == FB_ROTATE_CW) { |
9c44e5f6 AD |
400 | fb_rotate_logo_cw(image->data, dst, image->width, |
401 | image->height); | |
0a786596 | 402 | swap(image->width, image->height); |
abed5d15 GU |
403 | tmp = image->dy; |
404 | image->dy = image->dx; | |
405 | image->dx = info->var.xres - image->width - tmp; | |
f837e6f7 | 406 | } else if (rotate == FB_ROTATE_CCW) { |
9c44e5f6 AD |
407 | fb_rotate_logo_ccw(image->data, dst, image->width, |
408 | image->height); | |
0a786596 | 409 | swap(image->width, image->height); |
abed5d15 GU |
410 | tmp = image->dx; |
411 | image->dx = image->dy; | |
412 | image->dy = info->var.yres - image->height - tmp; | |
9c44e5f6 AD |
413 | } |
414 | ||
415 | image->data = dst; | |
416 | } | |
417 | ||
418 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, | |
448d4797 | 419 | int rotate, unsigned int num) |
9c44e5f6 | 420 | { |
448d4797 | 421 | unsigned int x; |
9c44e5f6 | 422 | |
a5399db1 MS |
423 | if (image->width > info->var.xres || image->height > info->var.yres) |
424 | return; | |
425 | ||
9c44e5f6 | 426 | if (rotate == FB_ROTATE_UR) { |
448d4797 GU |
427 | for (x = 0; |
428 | x < num && image->dx + image->width <= info->var.xres; | |
429 | x++) { | |
9c44e5f6 | 430 | info->fbops->fb_imageblit(info, image); |
448d4797 | 431 | image->dx += image->width + 8; |
9c44e5f6 AD |
432 | } |
433 | } else if (rotate == FB_ROTATE_UD) { | |
f75df8d4 PR |
434 | u32 dx = image->dx; |
435 | ||
436 | for (x = 0; x < num && image->dx <= dx; x++) { | |
9c44e5f6 | 437 | info->fbops->fb_imageblit(info, image); |
448d4797 | 438 | image->dx -= image->width + 8; |
9c44e5f6 AD |
439 | } |
440 | } else if (rotate == FB_ROTATE_CW) { | |
448d4797 GU |
441 | for (x = 0; |
442 | x < num && image->dy + image->height <= info->var.yres; | |
443 | x++) { | |
9c44e5f6 | 444 | info->fbops->fb_imageblit(info, image); |
448d4797 | 445 | image->dy += image->height + 8; |
9c44e5f6 AD |
446 | } |
447 | } else if (rotate == FB_ROTATE_CCW) { | |
f75df8d4 PR |
448 | u32 dy = image->dy; |
449 | ||
450 | for (x = 0; x < num && image->dy <= dy; x++) { | |
9c44e5f6 | 451 | info->fbops->fb_imageblit(info, image); |
448d4797 | 452 | image->dy -= image->height + 8; |
9c44e5f6 AD |
453 | } |
454 | } | |
455 | } | |
456 | ||
90da63e5 GU |
457 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
458 | const struct linux_logo *logo, int y, | |
459 | unsigned int n) | |
1da177e4 LT |
460 | { |
461 | u32 *palette = NULL, *saved_pseudo_palette = NULL; | |
9c44e5f6 | 462 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
1da177e4 | 463 | struct fb_image image; |
1da177e4 LT |
464 | |
465 | /* Return if the frame buffer is not mapped or suspended */ | |
90da63e5 | 466 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
376b3ff5 | 467 | info->fbops->owner) |
1da177e4 LT |
468 | return 0; |
469 | ||
470 | image.depth = 8; | |
90da63e5 | 471 | image.data = logo->data; |
1da177e4 LT |
472 | |
473 | if (fb_logo.needs_cmapreset) | |
90da63e5 | 474 | fb_set_logocmap(info, logo); |
1da177e4 | 475 | |
9900abfb | 476 | if (fb_logo.needs_truepalette || |
1da177e4 LT |
477 | fb_logo.needs_directpalette) { |
478 | palette = kmalloc(256 * 4, GFP_KERNEL); | |
479 | if (palette == NULL) | |
480 | return 0; | |
481 | ||
482 | if (fb_logo.needs_truepalette) | |
90da63e5 | 483 | fb_set_logo_truepalette(info, logo, palette); |
1da177e4 | 484 | else |
90da63e5 | 485 | fb_set_logo_directpalette(info, logo, palette); |
1da177e4 LT |
486 | |
487 | saved_pseudo_palette = info->pseudo_palette; | |
488 | info->pseudo_palette = palette; | |
489 | } | |
490 | ||
491 | if (fb_logo.depth <= 4) { | |
6da2ec56 KC |
492 | logo_new = kmalloc_array(logo->width, logo->height, |
493 | GFP_KERNEL); | |
1da177e4 LT |
494 | if (logo_new == NULL) { |
495 | kfree(palette); | |
496 | if (saved_pseudo_palette) | |
497 | info->pseudo_palette = saved_pseudo_palette; | |
498 | return 0; | |
499 | } | |
500 | image.data = logo_new; | |
90da63e5 | 501 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
1da177e4 LT |
502 | } |
503 | ||
890d14d2 | 504 | if (fb_center_logo) { |
3d8b1933 PR |
505 | int xres = info->var.xres; |
506 | int yres = info->var.yres; | |
507 | ||
508 | if (rotate == FB_ROTATE_CW || rotate == FB_ROTATE_CCW) { | |
509 | xres = info->var.yres; | |
510 | yres = info->var.xres; | |
511 | } | |
512 | ||
513 | while (n && (n * (logo->width + 8) - 8 > xres)) | |
514 | --n; | |
955f0476 | 515 | image.dx = (xres - (n * (logo->width + 8) - 8)) / 2; |
3d8b1933 | 516 | image.dy = y ?: (yres - logo->height) / 2; |
890d14d2 PR |
517 | } else { |
518 | image.dx = 0; | |
519 | image.dy = y; | |
3d8b1933 | 520 | } |
890d14d2 | 521 | |
90da63e5 GU |
522 | image.width = logo->width; |
523 | image.height = logo->height; | |
1da177e4 | 524 | |
9c44e5f6 | 525 | if (rotate) { |
6da2ec56 KC |
526 | logo_rotate = kmalloc_array(logo->width, logo->height, |
527 | GFP_KERNEL); | |
9c44e5f6 AD |
528 | if (logo_rotate) |
529 | fb_rotate_logo(info, logo_rotate, &image, rotate); | |
1da177e4 | 530 | } |
9c44e5f6 | 531 | |
90da63e5 | 532 | fb_do_show_logo(info, &image, rotate, n); |
9c44e5f6 | 533 | |
1da177e4 LT |
534 | kfree(palette); |
535 | if (saved_pseudo_palette != NULL) | |
536 | info->pseudo_palette = saved_pseudo_palette; | |
537 | kfree(logo_new); | |
9c44e5f6 | 538 | kfree(logo_rotate); |
e41f184d | 539 | return image.dy + logo->height; |
90da63e5 GU |
540 | } |
541 | ||
9900abfb GU |
542 | |
543 | #ifdef CONFIG_FB_LOGO_EXTRA | |
544 | ||
545 | #define FB_LOGO_EX_NUM_MAX 10 | |
546 | static struct logo_data_extra { | |
547 | const struct linux_logo *logo; | |
548 | unsigned int n; | |
549 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; | |
550 | static unsigned int fb_logo_ex_num; | |
551 | ||
552 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) | |
553 | { | |
554 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) | |
555 | return; | |
556 | ||
557 | fb_logo_ex[fb_logo_ex_num].logo = logo; | |
558 | fb_logo_ex[fb_logo_ex_num].n = n; | |
559 | fb_logo_ex_num++; | |
560 | } | |
561 | ||
562 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, | |
563 | unsigned int yres) | |
564 | { | |
565 | unsigned int i; | |
566 | ||
567 | /* FIXME: logo_ex supports only truecolor fb. */ | |
568 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) | |
569 | fb_logo_ex_num = 0; | |
570 | ||
571 | for (i = 0; i < fb_logo_ex_num; i++) { | |
4fb6de25 GU |
572 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
573 | fb_logo_ex[i].logo = NULL; | |
574 | continue; | |
575 | } | |
9900abfb GU |
576 | height += fb_logo_ex[i].logo->height; |
577 | if (height > yres) { | |
578 | height -= fb_logo_ex[i].logo->height; | |
579 | fb_logo_ex_num = i; | |
580 | break; | |
581 | } | |
582 | } | |
583 | return height; | |
584 | } | |
585 | ||
586 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
587 | { | |
588 | unsigned int i; | |
589 | ||
590 | for (i = 0; i < fb_logo_ex_num; i++) | |
e41f184d PR |
591 | y = fb_show_logo_line(info, rotate, |
592 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); | |
9900abfb GU |
593 | |
594 | return y; | |
595 | } | |
596 | ||
597 | #else /* !CONFIG_FB_LOGO_EXTRA */ | |
598 | ||
599 | static inline int fb_prepare_extra_logos(struct fb_info *info, | |
600 | unsigned int height, | |
601 | unsigned int yres) | |
602 | { | |
603 | return height; | |
604 | } | |
605 | ||
606 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) | |
607 | { | |
608 | return y; | |
609 | } | |
610 | ||
611 | #endif /* CONFIG_FB_LOGO_EXTRA */ | |
612 | ||
613 | ||
614 | int fb_prepare_logo(struct fb_info *info, int rotate) | |
615 | { | |
616 | int depth = fb_get_color_depth(&info->var, &info->fix); | |
617 | unsigned int yres; | |
3d8b1933 | 618 | int height; |
9900abfb GU |
619 | |
620 | memset(&fb_logo, 0, sizeof(struct logo_data)); | |
621 | ||
622 | if (info->flags & FBINFO_MISC_TILEBLITTING || | |
691f50ab | 623 | info->fbops->owner || !fb_logo_count) |
9900abfb GU |
624 | return 0; |
625 | ||
626 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { | |
627 | depth = info->var.blue.length; | |
628 | if (info->var.red.length < depth) | |
629 | depth = info->var.red.length; | |
630 | if (info->var.green.length < depth) | |
631 | depth = info->var.green.length; | |
632 | } | |
633 | ||
634 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { | |
635 | /* assume console colormap */ | |
636 | depth = 4; | |
637 | } | |
638 | ||
9900abfb GU |
639 | /* Return if no suitable logo was found */ |
640 | fb_logo.logo = fb_find_logo(depth); | |
641 | ||
642 | if (!fb_logo.logo) { | |
643 | return 0; | |
644 | } | |
645 | ||
646 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) | |
647 | yres = info->var.yres; | |
648 | else | |
649 | yres = info->var.xres; | |
650 | ||
651 | if (fb_logo.logo->height > yres) { | |
652 | fb_logo.logo = NULL; | |
653 | return 0; | |
654 | } | |
655 | ||
656 | /* What depth we asked for might be different from what we get */ | |
657 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) | |
658 | fb_logo.depth = 8; | |
659 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) | |
660 | fb_logo.depth = 4; | |
661 | else | |
662 | fb_logo.depth = 1; | |
663 | ||
1692b37c | 664 | |
93166f5f NC |
665 | if (fb_logo.depth > 4 && depth > 4) { |
666 | switch (info->fix.visual) { | |
667 | case FB_VISUAL_TRUECOLOR: | |
668 | fb_logo.needs_truepalette = 1; | |
669 | break; | |
670 | case FB_VISUAL_DIRECTCOLOR: | |
671 | fb_logo.needs_directpalette = 1; | |
672 | fb_logo.needs_cmapreset = 1; | |
673 | break; | |
674 | case FB_VISUAL_PSEUDOCOLOR: | |
675 | fb_logo.needs_cmapreset = 1; | |
676 | break; | |
677 | } | |
678 | } | |
1692b37c | 679 | |
3d8b1933 | 680 | height = fb_logo.logo->height; |
890d14d2 PR |
681 | if (fb_center_logo) |
682 | height += (yres - fb_logo.logo->height) / 2; | |
3d8b1933 PR |
683 | |
684 | return fb_prepare_extra_logos(info, height, yres); | |
9900abfb GU |
685 | } |
686 | ||
90da63e5 GU |
687 | int fb_show_logo(struct fb_info *info, int rotate) |
688 | { | |
691f50ab | 689 | unsigned int count; |
9900abfb GU |
690 | int y; |
691 | ||
691f50ab PR |
692 | if (!fb_logo_count) |
693 | return 0; | |
694 | ||
695 | count = fb_logo_count < 0 ? num_online_cpus() : fb_logo_count; | |
696 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, count); | |
9900abfb GU |
697 | y = fb_show_extra_logos(info, y, rotate); |
698 | ||
699 | return y; | |
1da177e4 LT |
700 | } |
701 | #else | |
9c44e5f6 AD |
702 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
703 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } | |
1da177e4 | 704 | #endif /* CONFIG_LOGO */ |
23e51f87 | 705 | EXPORT_SYMBOL(fb_prepare_logo); |
9c29fba1 | 706 | EXPORT_SYMBOL(fb_show_logo); |
1da177e4 | 707 | |
0aa16341 AD |
708 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
709 | { | |
698b3682 | 710 | mutex_lock(®istration_lock); |
0aa16341 AD |
711 | return (*pos < FB_MAX) ? pos : NULL; |
712 | } | |
713 | ||
714 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) | |
715 | { | |
716 | (*pos)++; | |
717 | return (*pos < FB_MAX) ? pos : NULL; | |
718 | } | |
719 | ||
720 | static void fb_seq_stop(struct seq_file *m, void *v) | |
1da177e4 | 721 | { |
698b3682 | 722 | mutex_unlock(®istration_lock); |
1da177e4 LT |
723 | } |
724 | ||
0aa16341 AD |
725 | static int fb_seq_show(struct seq_file *m, void *v) |
726 | { | |
727 | int i = *(loff_t *)v; | |
728 | struct fb_info *fi = registered_fb[i]; | |
729 | ||
730 | if (fi) | |
731 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); | |
732 | return 0; | |
733 | } | |
734 | ||
6dae40ae | 735 | static const struct seq_operations __maybe_unused proc_fb_seq_ops = { |
0aa16341 AD |
736 | .start = fb_seq_start, |
737 | .next = fb_seq_next, | |
738 | .stop = fb_seq_stop, | |
739 | .show = fb_seq_show, | |
740 | }; | |
741 | ||
c47747fd LT |
742 | /* |
743 | * We hold a reference to the fb_info in file->private_data, | |
744 | * but if the current registered fb has changed, we don't | |
745 | * actually want to use it. | |
746 | * | |
747 | * So look up the fb_info using the inode minor number, | |
748 | * and just verify it against the reference we have. | |
749 | */ | |
750 | static struct fb_info *file_fb_info(struct file *file) | |
1da177e4 | 751 | { |
496ad9aa | 752 | struct inode *inode = file_inode(file); |
1da177e4 LT |
753 | int fbidx = iminor(inode); |
754 | struct fb_info *info = registered_fb[fbidx]; | |
c47747fd LT |
755 | |
756 | if (info != file->private_data) | |
757 | info = NULL; | |
758 | return info; | |
759 | } | |
760 | ||
761 | static ssize_t | |
762 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) | |
763 | { | |
764 | unsigned long p = *ppos; | |
765 | struct fb_info *info = file_fb_info(file); | |
f11b478d JH |
766 | u8 *buffer, *dst; |
767 | u8 __iomem *src; | |
768 | int c, cnt = 0, err = 0; | |
1da177e4 LT |
769 | unsigned long total_size; |
770 | ||
771 | if (!info || ! info->screen_base) | |
772 | return -ENODEV; | |
773 | ||
774 | if (info->state != FBINFO_STATE_RUNNING) | |
775 | return -EPERM; | |
776 | ||
777 | if (info->fbops->fb_read) | |
3f9b0880 | 778 | return info->fbops->fb_read(info, buf, count, ppos); |
2d05f56a | 779 | |
1da177e4 | 780 | total_size = info->screen_size; |
0a484a3a | 781 | |
1da177e4 LT |
782 | if (total_size == 0) |
783 | total_size = info->fix.smem_len; | |
784 | ||
785 | if (p >= total_size) | |
0a484a3a AD |
786 | return 0; |
787 | ||
1da177e4 | 788 | if (count >= total_size) |
0a484a3a AD |
789 | count = total_size; |
790 | ||
1da177e4 LT |
791 | if (count + p > total_size) |
792 | count = total_size - p; | |
793 | ||
1da177e4 LT |
794 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
795 | GFP_KERNEL); | |
796 | if (!buffer) | |
797 | return -ENOMEM; | |
798 | ||
f11b478d | 799 | src = (u8 __iomem *) (info->screen_base + p); |
1da177e4 LT |
800 | |
801 | if (info->fbops->fb_sync) | |
802 | info->fbops->fb_sync(info); | |
803 | ||
804 | while (count) { | |
805 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
806 | dst = buffer; | |
f11b478d JH |
807 | fb_memcpy_fromfb(dst, src, c); |
808 | dst += c; | |
809 | src += c; | |
1da177e4 LT |
810 | |
811 | if (copy_to_user(buf, buffer, c)) { | |
812 | err = -EFAULT; | |
813 | break; | |
814 | } | |
815 | *ppos += c; | |
816 | buf += c; | |
817 | cnt += c; | |
818 | count -= c; | |
819 | } | |
820 | ||
821 | kfree(buffer); | |
0a484a3a | 822 | |
1da177e4 LT |
823 | return (err) ? err : cnt; |
824 | } | |
825 | ||
826 | static ssize_t | |
827 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) | |
828 | { | |
829 | unsigned long p = *ppos; | |
c47747fd | 830 | struct fb_info *info = file_fb_info(file); |
f11b478d JH |
831 | u8 *buffer, *src; |
832 | u8 __iomem *dst; | |
833 | int c, cnt = 0, err = 0; | |
1da177e4 LT |
834 | unsigned long total_size; |
835 | ||
836 | if (!info || !info->screen_base) | |
837 | return -ENODEV; | |
838 | ||
839 | if (info->state != FBINFO_STATE_RUNNING) | |
840 | return -EPERM; | |
841 | ||
842 | if (info->fbops->fb_write) | |
3f9b0880 | 843 | return info->fbops->fb_write(info, buf, count, ppos); |
2d05f56a | 844 | |
1da177e4 | 845 | total_size = info->screen_size; |
0a484a3a | 846 | |
1da177e4 LT |
847 | if (total_size == 0) |
848 | total_size = info->fix.smem_len; | |
849 | ||
850 | if (p > total_size) | |
6a2a8866 | 851 | return -EFBIG; |
0a484a3a | 852 | |
6a2a8866 AD |
853 | if (count > total_size) { |
854 | err = -EFBIG; | |
0a484a3a | 855 | count = total_size; |
6a2a8866 AD |
856 | } |
857 | ||
858 | if (count + p > total_size) { | |
859 | if (!err) | |
860 | err = -ENOSPC; | |
0a484a3a | 861 | |
0a484a3a | 862 | count = total_size - p; |
6a2a8866 | 863 | } |
0a484a3a | 864 | |
1da177e4 LT |
865 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
866 | GFP_KERNEL); | |
867 | if (!buffer) | |
868 | return -ENOMEM; | |
869 | ||
f11b478d | 870 | dst = (u8 __iomem *) (info->screen_base + p); |
1da177e4 LT |
871 | |
872 | if (info->fbops->fb_sync) | |
873 | info->fbops->fb_sync(info); | |
874 | ||
875 | while (count) { | |
876 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; | |
877 | src = buffer; | |
0a484a3a | 878 | |
1da177e4 LT |
879 | if (copy_from_user(src, buf, c)) { |
880 | err = -EFAULT; | |
881 | break; | |
882 | } | |
0a484a3a | 883 | |
f11b478d JH |
884 | fb_memcpy_tofb(dst, src, c); |
885 | dst += c; | |
886 | src += c; | |
1da177e4 LT |
887 | *ppos += c; |
888 | buf += c; | |
889 | cnt += c; | |
890 | count -= c; | |
891 | } | |
0a484a3a | 892 | |
1da177e4 LT |
893 | kfree(buffer); |
894 | ||
6a2a8866 | 895 | return (cnt) ? cnt : err; |
1da177e4 LT |
896 | } |
897 | ||
1da177e4 LT |
898 | int |
899 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) | |
900 | { | |
1207069f | 901 | struct fb_fix_screeninfo *fix = &info->fix; |
7572a1ea VS |
902 | unsigned int yres = info->var.yres; |
903 | int err = 0; | |
1207069f AD |
904 | |
905 | if (var->yoffset > 0) { | |
906 | if (var->vmode & FB_VMODE_YWRAP) { | |
907 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) | |
908 | err = -EINVAL; | |
909 | else | |
910 | yres = 0; | |
911 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) | |
912 | err = -EINVAL; | |
913 | } | |
914 | ||
915 | if (var->xoffset > 0 && (!fix->xpanstep || | |
916 | (var->xoffset % fix->xpanstep))) | |
917 | err = -EINVAL; | |
918 | ||
7572a1ea | 919 | if (err || !info->fbops->fb_pan_display || |
99e9e7d6 FTS |
920 | var->yoffset > info->var.yres_virtual - yres || |
921 | var->xoffset > info->var.xres_virtual - info->var.xres) | |
1207069f | 922 | return -EINVAL; |
1da177e4 | 923 | |
1da177e4 LT |
924 | if ((err = info->fbops->fb_pan_display(var, info))) |
925 | return err; | |
c9c62dce JH |
926 | info->var.xoffset = var->xoffset; |
927 | info->var.yoffset = var->yoffset; | |
928 | if (var->vmode & FB_VMODE_YWRAP) | |
929 | info->var.vmode |= FB_VMODE_YWRAP; | |
930 | else | |
931 | info->var.vmode &= ~FB_VMODE_YWRAP; | |
932 | return 0; | |
1da177e4 | 933 | } |
9c29fba1 | 934 | EXPORT_SYMBOL(fb_pan_display); |
1da177e4 | 935 | |
38a3dc51 AD |
936 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
937 | u32 activate) | |
938 | { | |
38a3dc51 AD |
939 | struct fb_blit_caps caps, fbcaps; |
940 | int err = 0; | |
941 | ||
942 | memset(&caps, 0, sizeof(caps)); | |
943 | memset(&fbcaps, 0, sizeof(fbcaps)); | |
944 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; | |
0526c223 | 945 | fbcon_get_requirement(info, &caps); |
38a3dc51 AD |
946 | info->fbops->fb_get_caps(info, &fbcaps, var); |
947 | ||
948 | if (((fbcaps.x ^ caps.x) & caps.x) || | |
949 | ((fbcaps.y ^ caps.y) & caps.y) || | |
950 | (fbcaps.len < caps.len)) | |
951 | err = -EINVAL; | |
952 | ||
953 | return err; | |
954 | } | |
955 | ||
1da177e4 LT |
956 | int |
957 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) | |
958 | { | |
b1e7223f | 959 | int ret = 0; |
c428f35a DV |
960 | u32 activate; |
961 | struct fb_var_screeninfo old_var; | |
962 | struct fb_videomode mode; | |
9e146700 | 963 | struct fb_event event; |
8c28051c | 964 | u32 unused; |
1da177e4 LT |
965 | |
966 | if (var->activate & FB_ACTIVATE_INV_MODE) { | |
967 | struct fb_videomode mode1, mode2; | |
1da177e4 LT |
968 | |
969 | fb_var_to_videomode(&mode1, var); | |
970 | fb_var_to_videomode(&mode2, &info->var); | |
971 | /* make sure we don't delete the videomode of current var */ | |
972 | ret = fb_mode_is_equal(&mode1, &mode2); | |
0af77826 ZL |
973 | if (!ret) { |
974 | ret = fbcon_mode_deleted(info, &mode1); | |
975 | if (!ret) | |
976 | fb_delete_videomode(&mode1, &info->modelist); | |
977 | } | |
b1e7223f | 978 | |
c428f35a | 979 | return ret ? -EINVAL : 0; |
1da177e4 LT |
980 | } |
981 | ||
c428f35a DV |
982 | if (!(var->activate & FB_ACTIVATE_FORCE) && |
983 | !memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) | |
984 | return 0; | |
4941cb7a | 985 | |
c428f35a | 986 | activate = var->activate; |
fb21c2f4 | 987 | |
c428f35a DV |
988 | /* When using FOURCC mode, make sure the red, green, blue and |
989 | * transp fields are set to 0. | |
990 | */ | |
991 | if ((info->fix.capabilities & FB_CAP_FOURCC) && | |
992 | var->grayscale > 1) { | |
993 | if (var->red.offset || var->green.offset || | |
994 | var->blue.offset || var->transp.offset || | |
995 | var->red.length || var->green.length || | |
996 | var->blue.length || var->transp.length || | |
997 | var->red.msb_right || var->green.msb_right || | |
998 | var->blue.msb_right || var->transp.msb_right) | |
999 | return -EINVAL; | |
1000 | } | |
1da177e4 | 1001 | |
c428f35a DV |
1002 | if (!info->fbops->fb_check_var) { |
1003 | *var = info->var; | |
1004 | return 0; | |
1005 | } | |
b1e7223f | 1006 | |
a49145ac GK |
1007 | /* bitfill_aligned() assumes that it's at least 8x8 */ |
1008 | if (var->xres < 8 || var->yres < 8) | |
1009 | return -EINVAL; | |
1010 | ||
8c28051c TH |
1011 | /* Too huge resolution causes multiplication overflow. */ |
1012 | if (check_mul_overflow(var->xres, var->yres, &unused) || | |
1013 | check_mul_overflow(var->xres_virtual, var->yres_virtual, &unused)) | |
1014 | return -EINVAL; | |
1015 | ||
c428f35a DV |
1016 | ret = info->fbops->fb_check_var(var, info); |
1017 | ||
1018 | if (ret) | |
1019 | return ret; | |
1da177e4 | 1020 | |
6c11df58 HD |
1021 | /* verify that virtual resolution >= physical resolution */ |
1022 | if (var->xres_virtual < var->xres || | |
1023 | var->yres_virtual < var->yres) { | |
1024 | pr_warn("WARNING: fbcon: Driver '%s' missed to adjust virtual screen size (%ux%u vs. %ux%u)\n", | |
1025 | info->fix.id, | |
1026 | var->xres_virtual, var->yres_virtual, | |
1027 | var->xres, var->yres); | |
1028 | return -EINVAL; | |
1029 | } | |
1030 | ||
c428f35a DV |
1031 | if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_NOW) |
1032 | return 0; | |
1da177e4 | 1033 | |
c428f35a DV |
1034 | if (info->fbops->fb_get_caps) { |
1035 | ret = fb_check_caps(info, var, activate); | |
38a3dc51 | 1036 | |
c428f35a DV |
1037 | if (ret) |
1038 | return ret; | |
1039 | } | |
38a3dc51 | 1040 | |
c428f35a DV |
1041 | old_var = info->var; |
1042 | info->var = *var; | |
38a3dc51 | 1043 | |
c428f35a DV |
1044 | if (info->fbops->fb_set_par) { |
1045 | ret = info->fbops->fb_set_par(info); | |
0fcf6ada | 1046 | |
c428f35a DV |
1047 | if (ret) { |
1048 | info->var = old_var; | |
1049 | printk(KERN_WARNING "detected " | |
1050 | "fb_set_par error, " | |
1051 | "error code: %d\n", ret); | |
1052 | return ret; | |
1053 | } | |
1054 | } | |
1da177e4 | 1055 | |
c428f35a DV |
1056 | fb_pan_display(info, &info->var); |
1057 | fb_set_cmap(&info->cmap, info); | |
1058 | fb_var_to_videomode(&mode, &info->var); | |
1da177e4 | 1059 | |
c428f35a DV |
1060 | if (info->modelist.prev && info->modelist.next && |
1061 | !list_empty(&info->modelist)) | |
1062 | ret = fb_add_videomode(&mode, &info->modelist); | |
1da177e4 | 1063 | |
9e146700 DV |
1064 | if (ret) |
1065 | return ret; | |
1da177e4 | 1066 | |
9e146700 DV |
1067 | event.info = info; |
1068 | event.data = &mode; | |
1069 | fb_notifier_call_chain(FB_EVENT_MODE_CHANGE, &event); | |
1070 | ||
9e146700 | 1071 | return 0; |
1da177e4 | 1072 | } |
9c29fba1 | 1073 | EXPORT_SYMBOL(fb_set_var); |
1da177e4 LT |
1074 | |
1075 | int | |
1076 | fb_blank(struct fb_info *info, int blank) | |
2d05f56a | 1077 | { |
bf05929f | 1078 | struct fb_event event; |
e7642f35 | 1079 | int ret = -EINVAL; |
1da177e4 | 1080 | |
93166f5f NC |
1081 | if (blank > FB_BLANK_POWERDOWN) |
1082 | blank = FB_BLANK_POWERDOWN; | |
1da177e4 | 1083 | |
bf05929f ID |
1084 | event.info = info; |
1085 | event.data = ␣ | |
1086 | ||
1da177e4 | 1087 | if (info->fbops->fb_blank) |
93166f5f | 1088 | ret = info->fbops->fb_blank(blank, info); |
1da177e4 | 1089 | |
bf05929f | 1090 | if (!ret) |
256154fb | 1091 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
1da177e4 | 1092 | |
93166f5f | 1093 | return ret; |
1da177e4 | 1094 | } |
9c29fba1 | 1095 | EXPORT_SYMBOL(fb_blank); |
1da177e4 | 1096 | |
a684e7d3 GU |
1097 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
1098 | unsigned long arg) | |
1da177e4 | 1099 | { |
f23c57e2 | 1100 | const struct fb_ops *fb; |
1da177e4 LT |
1101 | struct fb_var_screeninfo var; |
1102 | struct fb_fix_screeninfo fix; | |
1f5e31d7 | 1103 | struct fb_cmap cmap_from; |
1da177e4 | 1104 | struct fb_cmap_user cmap; |
1da177e4 | 1105 | void __user *argp = (void __user *)arg; |
e5367711 AC |
1106 | long ret = 0; |
1107 | ||
1da177e4 LT |
1108 | switch (cmd) { |
1109 | case FBIOGET_VSCREENINFO: | |
cf4a3ae4 | 1110 | lock_fb_info(info); |
1f5e31d7 AR |
1111 | var = info->var; |
1112 | unlock_fb_info(info); | |
1113 | ||
1114 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; | |
e5367711 | 1115 | break; |
1da177e4 | 1116 | case FBIOPUT_VSCREENINFO: |
1f5e31d7 AR |
1117 | if (copy_from_user(&var, argp, sizeof(var))) |
1118 | return -EFAULT; | |
ac751efa | 1119 | console_lock(); |
cf4a3ae4 | 1120 | lock_fb_info(info); |
e64242ca HD |
1121 | ret = fbcon_modechange_possible(info, &var); |
1122 | if (!ret) | |
1123 | ret = fb_set_var(info, &var); | |
d88ca7e1 TH |
1124 | if (!ret) |
1125 | fbcon_update_vcs(info, var.activate & FB_ACTIVATE_ALL); | |
1f5e31d7 | 1126 | unlock_fb_info(info); |
3a41c5db | 1127 | console_unlock(); |
1f5e31d7 | 1128 | if (!ret && copy_to_user(argp, &var, sizeof(var))) |
e5367711 AC |
1129 | ret = -EFAULT; |
1130 | break; | |
1da177e4 | 1131 | case FBIOGET_FSCREENINFO: |
cf4a3ae4 | 1132 | lock_fb_info(info); |
d3d19d6f | 1133 | memcpy(&fix, &info->fix, sizeof(fix)); |
da6c7707 DV |
1134 | if (info->flags & FBINFO_HIDE_SMEM_START) |
1135 | fix.smem_start = 0; | |
1f5e31d7 AR |
1136 | unlock_fb_info(info); |
1137 | ||
1138 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; | |
e5367711 | 1139 | break; |
1da177e4 LT |
1140 | case FBIOPUTCMAP: |
1141 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 AR |
1142 | return -EFAULT; |
1143 | ret = fb_set_user_cmap(&cmap, info); | |
e5367711 | 1144 | break; |
1da177e4 LT |
1145 | case FBIOGETCMAP: |
1146 | if (copy_from_user(&cmap, argp, sizeof(cmap))) | |
1f5e31d7 | 1147 | return -EFAULT; |
cf4a3ae4 | 1148 | lock_fb_info(info); |
1f5e31d7 AR |
1149 | cmap_from = info->cmap; |
1150 | unlock_fb_info(info); | |
1151 | ret = fb_cmap_to_user(&cmap_from, &cmap); | |
e5367711 | 1152 | break; |
1da177e4 | 1153 | case FBIOPAN_DISPLAY: |
1f5e31d7 AR |
1154 | if (copy_from_user(&var, argp, sizeof(var))) |
1155 | return -EFAULT; | |
ac751efa | 1156 | console_lock(); |
cf4a3ae4 | 1157 | lock_fb_info(info); |
e5367711 | 1158 | ret = fb_pan_display(info, &var); |
1f5e31d7 | 1159 | unlock_fb_info(info); |
3a41c5db | 1160 | console_unlock(); |
e5367711 | 1161 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
1f5e31d7 | 1162 | return -EFAULT; |
e5367711 | 1163 | break; |
1da177e4 | 1164 | case FBIO_CURSOR: |
e5367711 AC |
1165 | ret = -EINVAL; |
1166 | break; | |
1da177e4 | 1167 | case FBIOGET_CON2FBMAP: |
fe2d70d6 | 1168 | ret = fbcon_get_con2fb_map_ioctl(argp); |
e5367711 | 1169 | break; |
1da177e4 | 1170 | case FBIOPUT_CON2FBMAP: |
fe2d70d6 | 1171 | ret = fbcon_set_con2fb_map_ioctl(argp); |
e5367711 | 1172 | break; |
1da177e4 | 1173 | case FBIOBLANK: |
68e8cc2a YZ |
1174 | if (arg > FB_BLANK_POWERDOWN) |
1175 | return -EINVAL; | |
ac751efa | 1176 | console_lock(); |
cf4a3ae4 | 1177 | lock_fb_info(info); |
e5367711 | 1178 | ret = fb_blank(info, arg); |
de29ae5c DV |
1179 | /* might again call into fb_blank */ |
1180 | fbcon_fb_blanked(info, arg); | |
1f5e31d7 | 1181 | unlock_fb_info(info); |
3a41c5db | 1182 | console_unlock(); |
1f5e31d7 | 1183 | break; |
1da177e4 | 1184 | default: |
cf4a3ae4 | 1185 | lock_fb_info(info); |
1f5e31d7 AR |
1186 | fb = info->fbops; |
1187 | if (fb->fb_ioctl) | |
e5367711 | 1188 | ret = fb->fb_ioctl(info, cmd, arg); |
1f5e31d7 AR |
1189 | else |
1190 | ret = -ENOTTY; | |
1191 | unlock_fb_info(info); | |
1da177e4 | 1192 | } |
a684e7d3 GU |
1193 | return ret; |
1194 | } | |
1195 | ||
1196 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) | |
a684e7d3 | 1197 | { |
c47747fd | 1198 | struct fb_info *info = file_fb_info(file); |
a684e7d3 | 1199 | |
c47747fd LT |
1200 | if (!info) |
1201 | return -ENODEV; | |
1f5e31d7 | 1202 | return do_fb_ioctl(info, cmd, arg); |
1da177e4 LT |
1203 | } |
1204 | ||
1205 | #ifdef CONFIG_COMPAT | |
c7f82d9c AB |
1206 | struct fb_fix_screeninfo32 { |
1207 | char id[16]; | |
1208 | compat_caddr_t smem_start; | |
1209 | u32 smem_len; | |
1210 | u32 type; | |
1211 | u32 type_aux; | |
1212 | u32 visual; | |
1213 | u16 xpanstep; | |
1214 | u16 ypanstep; | |
1215 | u16 ywrapstep; | |
1216 | u32 line_length; | |
1217 | compat_caddr_t mmio_start; | |
1218 | u32 mmio_len; | |
1219 | u32 accel; | |
1220 | u16 reserved[3]; | |
1221 | }; | |
1222 | ||
1223 | struct fb_cmap32 { | |
1224 | u32 start; | |
1225 | u32 len; | |
1226 | compat_caddr_t red; | |
1227 | compat_caddr_t green; | |
1228 | compat_caddr_t blue; | |
1229 | compat_caddr_t transp; | |
1230 | }; | |
1231 | ||
a684e7d3 GU |
1232 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
1233 | unsigned long arg) | |
c7f82d9c | 1234 | { |
06f42774 AB |
1235 | struct fb_cmap32 cmap32; |
1236 | struct fb_cmap cmap_from; | |
1237 | struct fb_cmap_user cmap; | |
c7f82d9c | 1238 | |
06f42774 | 1239 | if (copy_from_user(&cmap32, compat_ptr(arg), sizeof(cmap32))) |
c7f82d9c AB |
1240 | return -EFAULT; |
1241 | ||
06f42774 AB |
1242 | cmap = (struct fb_cmap_user) { |
1243 | .start = cmap32.start, | |
1244 | .len = cmap32.len, | |
1245 | .red = compat_ptr(cmap32.red), | |
1246 | .green = compat_ptr(cmap32.green), | |
1247 | .blue = compat_ptr(cmap32.blue), | |
1248 | .transp = compat_ptr(cmap32.transp), | |
1249 | }; | |
c7f82d9c | 1250 | |
06f42774 AB |
1251 | if (cmd == FBIOPUTCMAP) |
1252 | return fb_set_user_cmap(&cmap, info); | |
c7f82d9c | 1253 | |
06f42774 AB |
1254 | lock_fb_info(info); |
1255 | cmap_from = info->cmap; | |
1256 | unlock_fb_info(info); | |
1257 | ||
1258 | return fb_cmap_to_user(&cmap_from, &cmap); | |
c7f82d9c AB |
1259 | } |
1260 | ||
1261 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, | |
1262 | struct fb_fix_screeninfo32 __user *fix32) | |
1263 | { | |
1264 | __u32 data; | |
1265 | int err; | |
1266 | ||
1267 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); | |
1268 | ||
1269 | data = (__u32) (unsigned long) fix->smem_start; | |
1270 | err |= put_user(data, &fix32->smem_start); | |
1271 | ||
1272 | err |= put_user(fix->smem_len, &fix32->smem_len); | |
1273 | err |= put_user(fix->type, &fix32->type); | |
1274 | err |= put_user(fix->type_aux, &fix32->type_aux); | |
1275 | err |= put_user(fix->visual, &fix32->visual); | |
1276 | err |= put_user(fix->xpanstep, &fix32->xpanstep); | |
1277 | err |= put_user(fix->ypanstep, &fix32->ypanstep); | |
1278 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); | |
1279 | err |= put_user(fix->line_length, &fix32->line_length); | |
1280 | ||
1281 | data = (__u32) (unsigned long) fix->mmio_start; | |
1282 | err |= put_user(data, &fix32->mmio_start); | |
1283 | ||
1284 | err |= put_user(fix->mmio_len, &fix32->mmio_len); | |
1285 | err |= put_user(fix->accel, &fix32->accel); | |
1286 | err |= copy_to_user(fix32->reserved, fix->reserved, | |
1287 | sizeof(fix->reserved)); | |
1288 | ||
2c30aba2 DC |
1289 | if (err) |
1290 | return -EFAULT; | |
1291 | return 0; | |
c7f82d9c AB |
1292 | } |
1293 | ||
a684e7d3 GU |
1294 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
1295 | unsigned long arg) | |
c7f82d9c | 1296 | { |
c7f82d9c | 1297 | struct fb_fix_screeninfo fix; |
c7f82d9c | 1298 | |
cf4a3ae4 | 1299 | lock_fb_info(info); |
9a469037 | 1300 | fix = info->fix; |
da6c7707 DV |
1301 | if (info->flags & FBINFO_HIDE_SMEM_START) |
1302 | fix.smem_start = 0; | |
9a469037 AV |
1303 | unlock_fb_info(info); |
1304 | return do_fscreeninfo_to_user(&fix, compat_ptr(arg)); | |
c7f82d9c AB |
1305 | } |
1306 | ||
a684e7d3 GU |
1307 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
1308 | unsigned long arg) | |
1da177e4 | 1309 | { |
c47747fd | 1310 | struct fb_info *info = file_fb_info(file); |
f23c57e2 | 1311 | const struct fb_ops *fb; |
c7f82d9c | 1312 | long ret = -ENOIOCTLCMD; |
1da177e4 | 1313 | |
c47747fd LT |
1314 | if (!info) |
1315 | return -ENODEV; | |
1316 | fb = info->fbops; | |
c7f82d9c AB |
1317 | switch(cmd) { |
1318 | case FBIOGET_VSCREENINFO: | |
1319 | case FBIOPUT_VSCREENINFO: | |
1320 | case FBIOPAN_DISPLAY: | |
1321 | case FBIOGET_CON2FBMAP: | |
1322 | case FBIOPUT_CON2FBMAP: | |
1323 | arg = (unsigned long) compat_ptr(arg); | |
ad04fae0 | 1324 | fallthrough; |
c7f82d9c | 1325 | case FBIOBLANK: |
a684e7d3 GU |
1326 | ret = do_fb_ioctl(info, cmd, arg); |
1327 | break; | |
c7f82d9c AB |
1328 | |
1329 | case FBIOGET_FSCREENINFO: | |
a684e7d3 | 1330 | ret = fb_get_fscreeninfo(info, cmd, arg); |
c7f82d9c AB |
1331 | break; |
1332 | ||
1333 | case FBIOGETCMAP: | |
1334 | case FBIOPUTCMAP: | |
a684e7d3 | 1335 | ret = fb_getput_cmap(info, cmd, arg); |
c7f82d9c AB |
1336 | break; |
1337 | ||
1338 | default: | |
1339 | if (fb->fb_compat_ioctl) | |
67a6680d | 1340 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
c7f82d9c AB |
1341 | break; |
1342 | } | |
1da177e4 LT |
1343 | return ret; |
1344 | } | |
1345 | #endif | |
1346 | ||
10eb2659 | 1347 | static int |
1da177e4 LT |
1348 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
1349 | { | |
c47747fd | 1350 | struct fb_info *info = file_fb_info(file); |
fc9bbca8 | 1351 | unsigned long mmio_pgoff; |
1da177e4 LT |
1352 | unsigned long start; |
1353 | u32 len; | |
1da177e4 | 1354 | |
c47747fd LT |
1355 | if (!info) |
1356 | return -ENODEV; | |
537a1bf0 | 1357 | mutex_lock(&info->mm_lock); |
12281c8d | 1358 | |
59055851 | 1359 | if (info->fbops->fb_mmap) { |
1da177e4 | 1360 | int res; |
95cf9264 TL |
1361 | |
1362 | /* | |
1363 | * The framebuffer needs to be accessed decrypted, be sure | |
1364 | * SME protection is removed ahead of the call | |
1365 | */ | |
1366 | vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); | |
59055851 | 1367 | res = info->fbops->fb_mmap(info, vma); |
537a1bf0 | 1368 | mutex_unlock(&info->mm_lock); |
1da177e4 | 1369 | return res; |
59055851 TZ |
1370 | #if IS_ENABLED(CONFIG_FB_DEFERRED_IO) |
1371 | } else if (info->fbdefio) { | |
1372 | /* | |
1373 | * FB deferred I/O wants you to handle mmap in your drivers. At a | |
1374 | * minimum, point struct fb_ops.fb_mmap to fb_deferred_io_mmap(). | |
1375 | */ | |
1376 | dev_warn_once(info->dev, "fbdev mmap not set up for deferred I/O.\n"); | |
1377 | mutex_unlock(&info->mm_lock); | |
1378 | return -ENODEV; | |
1379 | #endif | |
1da177e4 LT |
1380 | } |
1381 | ||
fc9bbca8 LT |
1382 | /* |
1383 | * Ugh. This can be either the frame buffer mapping, or | |
1384 | * if pgoff points past it, the mmio mapping. | |
1385 | */ | |
1da177e4 | 1386 | start = info->fix.smem_start; |
fc9bbca8 LT |
1387 | len = info->fix.smem_len; |
1388 | mmio_pgoff = PAGE_ALIGN((start & ~PAGE_MASK) + len) >> PAGE_SHIFT; | |
1389 | if (vma->vm_pgoff >= mmio_pgoff) { | |
138f296e TV |
1390 | if (info->var.accel_flags) { |
1391 | mutex_unlock(&info->mm_lock); | |
1392 | return -EINVAL; | |
1393 | } | |
1394 | ||
fc9bbca8 | 1395 | vma->vm_pgoff -= mmio_pgoff; |
1da177e4 | 1396 | start = info->fix.mmio_start; |
fc9bbca8 | 1397 | len = info->fix.mmio_len; |
1da177e4 | 1398 | } |
537a1bf0 | 1399 | mutex_unlock(&info->mm_lock); |
fc9bbca8 | 1400 | |
c07fbfd1 | 1401 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
fc9bbca8 LT |
1402 | fb_pgprotect(file, vma, start); |
1403 | ||
1404 | return vm_iomap_memory(vma, start, len); | |
1da177e4 LT |
1405 | } |
1406 | ||
1407 | static int | |
1408 | fb_open(struct inode *inode, struct file *file) | |
a684e7d3 GU |
1409 | __acquires(&info->lock) |
1410 | __releases(&info->lock) | |
1da177e4 LT |
1411 | { |
1412 | int fbidx = iminor(inode); | |
1413 | struct fb_info *info; | |
1414 | int res = 0; | |
1415 | ||
698b3682 LT |
1416 | info = get_fb_info(fbidx); |
1417 | if (!info) { | |
a65e5d78 | 1418 | request_module("fb%d", fbidx); |
698b3682 LT |
1419 | info = get_fb_info(fbidx); |
1420 | if (!info) | |
1421 | return -ENODEV; | |
1422 | } | |
1423 | if (IS_ERR(info)) | |
1424 | return PTR_ERR(info); | |
1425 | ||
cf4a3ae4 | 1426 | lock_fb_info(info); |
fc7f687a JC |
1427 | if (!try_module_get(info->fbops->owner)) { |
1428 | res = -ENODEV; | |
1429 | goto out; | |
1430 | } | |
cae8a12f | 1431 | file->private_data = info; |
1da177e4 LT |
1432 | if (info->fbops->fb_open) { |
1433 | res = info->fbops->fb_open(info,1); | |
1434 | if (res) | |
1435 | module_put(info->fbops->owner); | |
1436 | } | |
0b78f8bc MW |
1437 | #ifdef CONFIG_FB_DEFERRED_IO |
1438 | if (info->fbdefio) | |
1439 | fb_deferred_io_open(info, inode, file); | |
1440 | #endif | |
fc7f687a | 1441 | out: |
cf4a3ae4 | 1442 | unlock_fb_info(info); |
698b3682 LT |
1443 | if (res) |
1444 | put_fb_info(info); | |
1da177e4 LT |
1445 | return res; |
1446 | } | |
1447 | ||
2d05f56a | 1448 | static int |
1da177e4 | 1449 | fb_release(struct inode *inode, struct file *file) |
a684e7d3 GU |
1450 | __acquires(&info->lock) |
1451 | __releases(&info->lock) | |
1da177e4 | 1452 | { |
cae8a12f | 1453 | struct fb_info * const info = file->private_data; |
1da177e4 | 1454 | |
cf4a3ae4 | 1455 | lock_fb_info(info); |
3efc61d9 TI |
1456 | #if IS_ENABLED(CONFIG_FB_DEFERRED_IO) |
1457 | if (info->fbdefio) | |
1458 | fb_deferred_io_release(info); | |
1459 | #endif | |
1da177e4 LT |
1460 | if (info->fbops->fb_release) |
1461 | info->fbops->fb_release(info,1); | |
1462 | module_put(info->fbops->owner); | |
cf4a3ae4 | 1463 | unlock_fb_info(info); |
698b3682 | 1464 | put_fb_info(info); |
1da177e4 LT |
1465 | return 0; |
1466 | } | |
1467 | ||
4c99ceda | 1468 | #if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU) |
82f42e4c BG |
1469 | unsigned long get_fb_unmapped_area(struct file *filp, |
1470 | unsigned long addr, unsigned long len, | |
1471 | unsigned long pgoff, unsigned long flags) | |
1472 | { | |
1473 | struct fb_info * const info = filp->private_data; | |
1474 | unsigned long fb_size = PAGE_ALIGN(info->fix.smem_len); | |
1475 | ||
1476 | if (pgoff > fb_size || len > fb_size - pgoff) | |
1477 | return -EINVAL; | |
1478 | ||
1479 | return (unsigned long)info->screen_base + pgoff; | |
1480 | } | |
1481 | #endif | |
1482 | ||
0128beee | 1483 | static const struct file_operations fb_fops = { |
1da177e4 LT |
1484 | .owner = THIS_MODULE, |
1485 | .read = fb_read, | |
1486 | .write = fb_write, | |
e5367711 | 1487 | .unlocked_ioctl = fb_ioctl, |
1da177e4 LT |
1488 | #ifdef CONFIG_COMPAT |
1489 | .compat_ioctl = fb_compat_ioctl, | |
1490 | #endif | |
1491 | .mmap = fb_mmap, | |
1492 | .open = fb_open, | |
1493 | .release = fb_release, | |
82f42e4c | 1494 | #if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \ |
4c99ceda BG |
1495 | (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \ |
1496 | !defined(CONFIG_MMU)) | |
1da177e4 LT |
1497 | .get_unmapped_area = get_fb_unmapped_area, |
1498 | #endif | |
5e841b88 PM |
1499 | #ifdef CONFIG_FB_DEFERRED_IO |
1500 | .fsync = fb_deferred_io_fsync, | |
1501 | #endif | |
6038f373 | 1502 | .llseek = default_llseek, |
1da177e4 LT |
1503 | }; |
1504 | ||
9a179176 AD |
1505 | struct class *fb_class; |
1506 | EXPORT_SYMBOL(fb_class); | |
e4c690e0 AV |
1507 | |
1508 | static int fb_check_foreignness(struct fb_info *fi) | |
1509 | { | |
1510 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; | |
1511 | ||
1512 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; | |
1513 | ||
1514 | #ifdef __BIG_ENDIAN | |
1515 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; | |
1516 | #else | |
1517 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; | |
1518 | #endif /* __BIG_ENDIAN */ | |
1519 | ||
1520 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { | |
1521 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " | |
1522 | "support this framebuffer\n", fi->fix.id); | |
1523 | return -ENOSYS; | |
1524 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { | |
1525 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " | |
1526 | "support this framebuffer\n", fi->fix.id); | |
1527 | return -ENOSYS; | |
1528 | } | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
712f3147 | 1533 | static int do_register_framebuffer(struct fb_info *fb_info) |
1da177e4 | 1534 | { |
6e7da3af | 1535 | int i; |
96fe6a21 | 1536 | struct fb_videomode mode; |
1da177e4 | 1537 | |
e4c690e0 AV |
1538 | if (fb_check_foreignness(fb_info)) |
1539 | return -ENOSYS; | |
1540 | ||
c590cece BP |
1541 | if (num_registered_fb == FB_MAX) |
1542 | return -ENXIO; | |
1543 | ||
1da177e4 LT |
1544 | num_registered_fb++; |
1545 | for (i = 0 ; i < FB_MAX; i++) | |
1546 | if (!registered_fb[i]) | |
1547 | break; | |
1548 | fb_info->node = i; | |
0189cb57 | 1549 | refcount_set(&fb_info->count, 1); |
6c96895e LT |
1550 | mutex_init(&fb_info->lock); |
1551 | mutex_init(&fb_info->mm_lock); | |
1da177e4 | 1552 | |
77997aaa GKH |
1553 | fb_info->dev = device_create(fb_class, fb_info->device, |
1554 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); | |
78cde088 | 1555 | if (IS_ERR(fb_info->dev)) { |
1da177e4 | 1556 | /* Not fatal */ |
78cde088 GKH |
1557 | printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev)); |
1558 | fb_info->dev = NULL; | |
1da177e4 | 1559 | } else |
78cde088 | 1560 | fb_init_device(fb_info); |
1da177e4 LT |
1561 | |
1562 | if (fb_info->pixmap.addr == NULL) { | |
1563 | fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL); | |
1564 | if (fb_info->pixmap.addr) { | |
1565 | fb_info->pixmap.size = FBPIXMAPSIZE; | |
1566 | fb_info->pixmap.buf_align = 1; | |
1567 | fb_info->pixmap.scan_align = 1; | |
58a60643 | 1568 | fb_info->pixmap.access_align = 32; |
1da177e4 LT |
1569 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
1570 | } | |
2d05f56a | 1571 | } |
1da177e4 LT |
1572 | fb_info->pixmap.offset = 0; |
1573 | ||
bf26ad72 AD |
1574 | if (!fb_info->pixmap.blit_x) |
1575 | fb_info->pixmap.blit_x = ~(u32)0; | |
1576 | ||
1577 | if (!fb_info->pixmap.blit_y) | |
1578 | fb_info->pixmap.blit_y = ~(u32)0; | |
1579 | ||
96fe6a21 | 1580 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
1da177e4 | 1581 | INIT_LIST_HEAD(&fb_info->modelist); |
1da177e4 | 1582 | |
3cf2667b JB |
1583 | if (fb_info->skip_vt_switch) |
1584 | pm_vt_switch_required(fb_info->dev, false); | |
1585 | else | |
1586 | pm_vt_switch_required(fb_info->dev, true); | |
1587 | ||
96fe6a21 AD |
1588 | fb_var_to_videomode(&mode, &fb_info->var); |
1589 | fb_add_videomode(&mode, &fb_info->modelist); | |
1da177e4 LT |
1590 | registered_fb[i] = fb_info; |
1591 | ||
97b67986 DV |
1592 | #ifdef CONFIG_GUMSTIX_AM200EPD |
1593 | { | |
1594 | struct fb_event event; | |
1595 | event.info = fb_info; | |
1596 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); | |
1597 | } | |
1598 | #endif | |
1599 | ||
6e7da3af | 1600 | return fbcon_fb_registered(fb_info); |
1da177e4 LT |
1601 | } |
1602 | ||
deb00d27 | 1603 | static void unbind_console(struct fb_info *fb_info) |
1da177e4 | 1604 | { |
8c5b0442 | 1605 | int i = fb_info->node; |
1da177e4 | 1606 | |
deb00d27 DV |
1607 | if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)) |
1608 | return; | |
513adb58 | 1609 | |
0e0f3250 | 1610 | fbcon_fb_unbind(fb_info); |
8c5b0442 MP |
1611 | } |
1612 | ||
f597c208 | 1613 | static void unlink_framebuffer(struct fb_info *fb_info) |
8c5b0442 | 1614 | { |
927ab1ae DV |
1615 | int i; |
1616 | ||
1617 | i = fb_info->node; | |
1618 | if (WARN_ON(i < 0 || i >= FB_MAX || registered_fb[i] != fb_info)) | |
1619 | return; | |
1620 | ||
1621 | if (!fb_info->dev) | |
1622 | return; | |
1623 | ||
1624 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); | |
1da177e4 | 1625 | |
3cf2667b JB |
1626 | pm_vt_switch_unregister(fb_info->dev); |
1627 | ||
927ab1ae DV |
1628 | unbind_console(fb_info); |
1629 | ||
1630 | fb_info->dev = NULL; | |
1631 | } | |
927ab1ae DV |
1632 | |
1633 | static void do_unregister_framebuffer(struct fb_info *fb_info) | |
1634 | { | |
1635 | unlink_framebuffer(fb_info); | |
e614b18d | 1636 | if (fb_info->pixmap.addr && |
2c0c19b6 | 1637 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) { |
1da177e4 | 1638 | kfree(fb_info->pixmap.addr); |
2c0c19b6 ZM |
1639 | fb_info->pixmap.addr = NULL; |
1640 | } | |
1641 | ||
1da177e4 | 1642 | fb_destroy_modelist(&fb_info->modelist); |
8c5b0442 | 1643 | registered_fb[fb_info->node] = NULL; |
1da177e4 | 1644 | num_registered_fb--; |
78cde088 | 1645 | fb_cleanup_device(fb_info); |
97b67986 DV |
1646 | #ifdef CONFIG_GUMSTIX_AM200EPD |
1647 | { | |
1648 | struct fb_event event; | |
1649 | event.info = fb_info; | |
1650 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); | |
1651 | } | |
1652 | #endif | |
97b67986 | 1653 | fbcon_fb_unregistered(fb_info); |
4410f391 DA |
1654 | |
1655 | /* this may free fb info */ | |
698b3682 | 1656 | put_fb_info(fb_info); |
712f3147 LT |
1657 | } |
1658 | ||
712f3147 LT |
1659 | /** |
1660 | * register_framebuffer - registers a frame buffer device | |
1661 | * @fb_info: frame buffer info structure | |
1662 | * | |
1663 | * Registers a frame buffer device @fb_info. | |
1664 | * | |
1665 | * Returns negative errno on error, or zero for success. | |
1666 | * | |
1667 | */ | |
1668 | int | |
1669 | register_framebuffer(struct fb_info *fb_info) | |
1670 | { | |
1671 | int ret; | |
1672 | ||
1673 | mutex_lock(®istration_lock); | |
1674 | ret = do_register_framebuffer(fb_info); | |
1675 | mutex_unlock(®istration_lock); | |
1676 | ||
1677 | return ret; | |
1678 | } | |
9c29fba1 | 1679 | EXPORT_SYMBOL(register_framebuffer); |
712f3147 LT |
1680 | |
1681 | /** | |
1682 | * unregister_framebuffer - releases a frame buffer device | |
1683 | * @fb_info: frame buffer info structure | |
1684 | * | |
1685 | * Unregisters a frame buffer device @fb_info. | |
1686 | * | |
1687 | * Returns negative errno on error, or zero for success. | |
1688 | * | |
1689 | * This function will also notify the framebuffer console | |
1690 | * to release the driver. | |
1691 | * | |
1692 | * This is meant to be called within a driver's module_exit() | |
1693 | * function. If this is called outside module_exit(), ensure | |
1694 | * that the driver implements fb_open() and fb_release() to | |
1695 | * check that no processes are using the device. | |
1696 | */ | |
deb00d27 | 1697 | void |
712f3147 LT |
1698 | unregister_framebuffer(struct fb_info *fb_info) |
1699 | { | |
3367aa7d | 1700 | mutex_lock(®istration_lock); |
deb00d27 | 1701 | do_unregister_framebuffer(fb_info); |
3367aa7d | 1702 | mutex_unlock(®istration_lock); |
1da177e4 | 1703 | } |
9c29fba1 | 1704 | EXPORT_SYMBOL(unregister_framebuffer); |
1da177e4 | 1705 | |
1da177e4 LT |
1706 | /** |
1707 | * fb_set_suspend - low level driver signals suspend | |
1708 | * @info: framebuffer affected | |
1709 | * @state: 0 = resuming, !=0 = suspending | |
1710 | * | |
1711 | * This is meant to be used by low level drivers to | |
1712 | * signal suspend/resume to the core & clients. | |
1713 | * It must be called with the console semaphore held | |
1714 | */ | |
1715 | void fb_set_suspend(struct fb_info *info, int state) | |
1716 | { | |
7076404f DV |
1717 | WARN_CONSOLE_UNLOCKED(); |
1718 | ||
1da177e4 | 1719 | if (state) { |
50c50563 | 1720 | fbcon_suspended(info); |
1da177e4 LT |
1721 | info->state = FBINFO_STATE_SUSPENDED; |
1722 | } else { | |
1723 | info->state = FBINFO_STATE_RUNNING; | |
50c50563 | 1724 | fbcon_resumed(info); |
1da177e4 LT |
1725 | } |
1726 | } | |
9c29fba1 | 1727 | EXPORT_SYMBOL(fb_set_suspend); |
1da177e4 LT |
1728 | |
1729 | /** | |
1730 | * fbmem_init - init frame buffer subsystem | |
1731 | * | |
1732 | * Initialize the frame buffer subsystem. | |
1733 | * | |
1734 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. | |
1735 | * | |
1736 | */ | |
1737 | ||
1738 | static int __init | |
1739 | fbmem_init(void) | |
1740 | { | |
524edf38 AK |
1741 | int ret; |
1742 | ||
fddda2b7 | 1743 | if (!proc_create_seq("fb", 0, NULL, &proc_fb_seq_ops)) |
524edf38 | 1744 | return -ENOMEM; |
1da177e4 | 1745 | |
524edf38 AK |
1746 | ret = register_chrdev(FB_MAJOR, "fb", &fb_fops); |
1747 | if (ret) { | |
1da177e4 | 1748 | printk("unable to get major %d for fb devs\n", FB_MAJOR); |
524edf38 AK |
1749 | goto err_chrdev; |
1750 | } | |
1da177e4 | 1751 | |
1aaba11d | 1752 | fb_class = class_create("graphics"); |
1da177e4 | 1753 | if (IS_ERR(fb_class)) { |
524edf38 AK |
1754 | ret = PTR_ERR(fb_class); |
1755 | pr_warn("Unable to create fb class; errno = %d\n", ret); | |
1da177e4 | 1756 | fb_class = NULL; |
524edf38 | 1757 | goto err_class; |
1da177e4 | 1758 | } |
6104c370 DV |
1759 | |
1760 | fb_console_init(); | |
1761 | ||
1da177e4 | 1762 | return 0; |
524edf38 AK |
1763 | |
1764 | err_class: | |
1765 | unregister_chrdev(FB_MAJOR, "fb"); | |
1766 | err_chrdev: | |
1767 | remove_proc_entry("fb", NULL); | |
1768 | return ret; | |
1da177e4 LT |
1769 | } |
1770 | ||
1771 | #ifdef MODULE | |
1772 | module_init(fbmem_init); | |
1773 | static void __exit | |
1774 | fbmem_exit(void) | |
1775 | { | |
6104c370 DV |
1776 | fb_console_exit(); |
1777 | ||
c43f89c2 | 1778 | remove_proc_entry("fb", NULL); |
56b22935 | 1779 | class_destroy(fb_class); |
5a340cce | 1780 | unregister_chrdev(FB_MAJOR, "fb"); |
1da177e4 LT |
1781 | } |
1782 | ||
1783 | module_exit(fbmem_exit); | |
1784 | MODULE_LICENSE("GPL"); | |
1785 | MODULE_DESCRIPTION("Framebuffer base"); | |
1786 | #else | |
1787 | subsys_initcall(fbmem_init); | |
1788 | #endif | |
1789 | ||
1790 | int fb_new_modelist(struct fb_info *info) | |
1791 | { | |
1da177e4 LT |
1792 | struct fb_var_screeninfo var = info->var; |
1793 | struct list_head *pos, *n; | |
1794 | struct fb_modelist *modelist; | |
1795 | struct fb_videomode *m, mode; | |
a74cefd9 | 1796 | int err; |
1da177e4 LT |
1797 | |
1798 | list_for_each_safe(pos, n, &info->modelist) { | |
1799 | modelist = list_entry(pos, struct fb_modelist, list); | |
1800 | m = &modelist->mode; | |
1801 | fb_videomode_to_var(&var, m); | |
1802 | var.activate = FB_ACTIVATE_TEST; | |
1803 | err = fb_set_var(info, &var); | |
1804 | fb_var_to_videomode(&mode, &var); | |
1805 | if (err || !fb_mode_is_equal(m, &mode)) { | |
1806 | list_del(pos); | |
1807 | kfree(pos); | |
1808 | } | |
1809 | } | |
1810 | ||
13ff178c DV |
1811 | if (list_empty(&info->modelist)) |
1812 | return 1; | |
1da177e4 | 1813 | |
13ff178c | 1814 | fbcon_new_modelist(info); |
1da177e4 | 1815 | |
13ff178c | 1816 | return 0; |
1da177e4 LT |
1817 | } |
1818 | ||
0ba2fa8c TZ |
1819 | #if defined(CONFIG_VIDEO_NOMODESET) |
1820 | bool fb_modesetting_disabled(const char *drvname) | |
1821 | { | |
1822 | bool fwonly = video_firmware_drivers_only(); | |
1823 | ||
1824 | if (fwonly) | |
1825 | pr_warn("Driver %s not loading because of nomodeset parameter\n", | |
1826 | drvname); | |
1827 | ||
1828 | return fwonly; | |
1829 | } | |
1830 | EXPORT_SYMBOL(fb_modesetting_disabled); | |
1831 | #endif | |
1832 | ||
1da177e4 | 1833 | MODULE_LICENSE("GPL"); |