Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 16 | #include <linux/compat.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Jon Smirl | a8f340e | 2006-07-10 04:44:12 -0700 | [diff] [blame] | 24 | #include <linux/vt.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/init.h> |
| 26 | #include <linux/linux_logo.h> |
| 27 | #include <linux/proc_fs.h> |
Alexey Dobriyan | 0aa1634 | 2008-04-28 02:15:42 -0700 | [diff] [blame] | 28 | #include <linux/seq_file.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/console.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/kmod.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <linux/device.h> |
| 33 | #include <linux/efi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/fb.h> |
| 35 | |
Antonino A. Daplas | 10eb265 | 2007-07-17 04:05:27 -0700 | [diff] [blame] | 36 | #include <asm/fb.h> |
| 37 | |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | /* |
| 40 | * Frame buffer device initialization and setup routines |
| 41 | */ |
| 42 | |
| 43 | #define FBPIXMAPSIZE (1024 * 8) |
| 44 | |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 45 | struct fb_info *registered_fb[FB_MAX] __read_mostly; |
| 46 | int num_registered_fb __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Andrew Morton | 6a7f282 | 2009-03-31 15:25:19 -0700 | [diff] [blame] | 48 | int lock_fb_info(struct fb_info *info) |
| 49 | { |
| 50 | mutex_lock(&info->lock); |
| 51 | if (!info->fbops) { |
| 52 | mutex_unlock(&info->lock); |
| 53 | return 0; |
| 54 | } |
| 55 | return 1; |
| 56 | } |
| 57 | EXPORT_SYMBOL(lock_fb_info); |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | /* |
| 60 | * Helpers |
| 61 | */ |
| 62 | |
Antonino A. Daplas | b8c9094 | 2005-09-09 13:04:37 -0700 | [diff] [blame] | 63 | int fb_get_color_depth(struct fb_var_screeninfo *var, |
| 64 | struct fb_fix_screeninfo *fix) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | { |
Antonino A. Daplas | b8c9094 | 2005-09-09 13:04:37 -0700 | [diff] [blame] | 66 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | EXPORT_SYMBOL(fb_get_color_depth); |
| 85 | |
| 86 | /* |
James Simmons | f5a9951 | 2005-06-21 17:16:58 -0700 | [diff] [blame] | 87 | * Data padding functions. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | */ |
James Simmons | f1ab5da | 2005-06-21 17:17:07 -0700 | [diff] [blame] | 89 | void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
Antonino A. Daplas | 829e79b | 2005-09-09 13:10:04 -0700 | [diff] [blame] | 91 | __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
James Simmons | f1ab5da | 2005-06-21 17:17:07 -0700 | [diff] [blame] | 93 | EXPORT_SYMBOL(fb_pad_aligned_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
James Simmons | f1ab5da | 2005-06-21 17:17:07 -0700 | [diff] [blame] | 95 | void 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | { |
| 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 Simmons | f1ab5da | 2005-06-21 17:17:07 -0700 | [diff] [blame] | 123 | EXPORT_SYMBOL(fb_pad_unaligned_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | /* |
| 126 | * we need to lock this section since fb_cursor |
| 127 | * may use fb_imageblit() |
| 128 | */ |
| 129 | char* 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
| 163 | static inline unsigned safe_shift(unsigned d, int n) |
| 164 | { |
| 165 | return n < 0 ? d >> -n : d << n; |
| 166 | } |
| 167 | |
| 168 | static 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 | |
| 202 | static void fb_set_logo_truepalette(struct fb_info *info, |
| 203 | const struct linux_logo *logo, |
| 204 | u32 *palette) |
| 205 | { |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 206 | static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 232 | static void fb_set_logo_directpalette(struct fb_info *info, |
| 233 | const struct linux_logo *logo, |
| 234 | u32 *palette) |
| 235 | { |
| 236 | int redshift, greenshift, blueshift; |
| 237 | int i; |
| 238 | |
| 239 | redshift = info->var.red.offset; |
| 240 | greenshift = info->var.green.offset; |
| 241 | blueshift = info->var.blue.offset; |
| 242 | |
Clemens Ladisch | cf7ee55 | 2008-11-19 15:36:10 -0800 | [diff] [blame] | 243 | for (i = 32; i < 32 + logo->clutsize; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | palette[i] = i << redshift | i << greenshift | i << blueshift; |
| 245 | } |
| 246 | |
| 247 | static void fb_set_logo(struct fb_info *info, |
| 248 | const struct linux_logo *logo, u8 *dst, |
| 249 | int depth) |
| 250 | { |
Antonino A. Daplas | b8c9094 | 2005-09-09 13:04:37 -0700 | [diff] [blame] | 251 | int i, j, k; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | const u8 *src = logo->data; |
Antonino A. Daplas | b8c9094 | 2005-09-09 13:04:37 -0700 | [diff] [blame] | 253 | u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0; |
| 254 | u8 fg = 1, d; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
Antonino A. Daplas | 1692b37 | 2007-07-31 00:37:36 -0700 | [diff] [blame] | 256 | switch (fb_get_color_depth(&info->var, &info->fix)) { |
| 257 | case 1: |
| 258 | fg = 1; |
| 259 | break; |
| 260 | case 2: |
| 261 | fg = 3; |
| 262 | break; |
| 263 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | fg = 7; |
Antonino A. Daplas | 1692b37 | 2007-07-31 00:37:36 -0700 | [diff] [blame] | 265 | break; |
| 266 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Antonino A. Daplas | b8c9094 | 2005-09-09 13:04:37 -0700 | [diff] [blame] | 268 | if (info->fix.visual == FB_VISUAL_MONO01 || |
| 269 | info->fix.visual == FB_VISUAL_MONO10) |
| 270 | fg = ~((u8) (0xfff << info->var.green.length)); |
| 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | switch (depth) { |
| 273 | case 4: |
| 274 | for (i = 0; i < logo->height; i++) |
| 275 | for (j = 0; j < logo->width; src++) { |
| 276 | *dst++ = *src >> 4; |
| 277 | j++; |
| 278 | if (j < logo->width) { |
| 279 | *dst++ = *src & 0x0f; |
| 280 | j++; |
| 281 | } |
| 282 | } |
| 283 | break; |
| 284 | case 1: |
| 285 | for (i = 0; i < logo->height; i++) { |
| 286 | for (j = 0; j < logo->width; src++) { |
| 287 | d = *src ^ xor; |
| 288 | for (k = 7; k >= 0; k--) { |
| 289 | *dst++ = ((d >> k) & 1) ? fg : 0; |
| 290 | j++; |
| 291 | } |
| 292 | } |
| 293 | } |
| 294 | break; |
| 295 | } |
| 296 | } |
| 297 | |
| 298 | /* |
| 299 | * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors), |
| 300 | * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on |
| 301 | * the visual format and color depth of the framebuffer, the DAC, the |
| 302 | * pseudo_palette, and the logo data will be adjusted accordingly. |
| 303 | * |
| 304 | * Case 1 - linux_logo_clut224: |
| 305 | * Color exceeds the number of console colors (16), thus we set the hardware DAC |
| 306 | * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set. |
| 307 | * |
| 308 | * For visuals that require color info from the pseudo_palette, we also construct |
| 309 | * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags |
| 310 | * will be set. |
| 311 | * |
| 312 | * Case 2 - linux_logo_vga16: |
| 313 | * The number of colors just matches the console colors, thus there is no need |
| 314 | * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie, |
| 315 | * each byte contains color information for two pixels (upper and lower nibble). |
| 316 | * To be consistent with fb_imageblit() usage, we therefore separate the two |
| 317 | * nibbles into separate bytes. The "depth" flag will be set to 4. |
| 318 | * |
| 319 | * Case 3 - linux_logo_mono: |
| 320 | * This is similar with Case 2. Each byte contains information for 8 pixels. |
| 321 | * We isolate each bit and expand each into a byte. The "depth" flag will |
| 322 | * be set to 1. |
| 323 | */ |
| 324 | static struct logo_data { |
| 325 | int depth; |
| 326 | int needs_directpalette; |
| 327 | int needs_truepalette; |
| 328 | int needs_cmapreset; |
| 329 | const struct linux_logo *logo; |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 330 | } fb_logo __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 332 | static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height) |
| 333 | { |
| 334 | u32 size = width * height, i; |
| 335 | |
| 336 | out += size - 1; |
| 337 | |
| 338 | for (i = size; i--; ) |
| 339 | *out-- = *in++; |
| 340 | } |
| 341 | |
| 342 | static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height) |
| 343 | { |
Antonino A. Daplas | f837e6f | 2006-06-26 00:26:56 -0700 | [diff] [blame] | 344 | int i, j, h = height - 1; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 345 | |
| 346 | for (i = 0; i < height; i++) |
| 347 | for (j = 0; j < width; j++) |
Antonino A. Daplas | f837e6f | 2006-06-26 00:26:56 -0700 | [diff] [blame] | 348 | out[height * j + h - i] = *in++; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height) |
| 352 | { |
| 353 | int i, j, w = width - 1; |
| 354 | |
| 355 | for (i = 0; i < height; i++) |
| 356 | for (j = 0; j < width; j++) |
| 357 | out[height * (w - j) + i] = *in++; |
| 358 | } |
| 359 | |
| 360 | static void fb_rotate_logo(struct fb_info *info, u8 *dst, |
| 361 | struct fb_image *image, int rotate) |
| 362 | { |
| 363 | u32 tmp; |
| 364 | |
| 365 | if (rotate == FB_ROTATE_UD) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 366 | fb_rotate_logo_ud(image->data, dst, image->width, |
| 367 | image->height); |
Geert Uytterhoeven | abed5d1 | 2007-05-08 00:37:57 -0700 | [diff] [blame] | 368 | image->dx = info->var.xres - image->width - image->dx; |
| 369 | image->dy = info->var.yres - image->height - image->dy; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 370 | } else if (rotate == FB_ROTATE_CW) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 371 | fb_rotate_logo_cw(image->data, dst, image->width, |
| 372 | image->height); |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 373 | tmp = image->width; |
| 374 | image->width = image->height; |
| 375 | image->height = tmp; |
Geert Uytterhoeven | abed5d1 | 2007-05-08 00:37:57 -0700 | [diff] [blame] | 376 | tmp = image->dy; |
| 377 | image->dy = image->dx; |
| 378 | image->dx = info->var.xres - image->width - tmp; |
Antonino A. Daplas | f837e6f | 2006-06-26 00:26:56 -0700 | [diff] [blame] | 379 | } else if (rotate == FB_ROTATE_CCW) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 380 | fb_rotate_logo_ccw(image->data, dst, image->width, |
| 381 | image->height); |
Antonino A. Daplas | f837e6f | 2006-06-26 00:26:56 -0700 | [diff] [blame] | 382 | tmp = image->width; |
| 383 | image->width = image->height; |
| 384 | image->height = tmp; |
Geert Uytterhoeven | abed5d1 | 2007-05-08 00:37:57 -0700 | [diff] [blame] | 385 | tmp = image->dx; |
| 386 | image->dx = image->dy; |
| 387 | image->dy = info->var.yres - image->height - tmp; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 388 | } |
| 389 | |
| 390 | image->data = dst; |
| 391 | } |
| 392 | |
| 393 | static void fb_do_show_logo(struct fb_info *info, struct fb_image *image, |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 394 | int rotate, unsigned int num) |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 395 | { |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 396 | unsigned int x; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 397 | |
| 398 | if (rotate == FB_ROTATE_UR) { |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 399 | for (x = 0; |
| 400 | x < num && image->dx + image->width <= info->var.xres; |
| 401 | x++) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 402 | info->fbops->fb_imageblit(info, image); |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 403 | image->dx += image->width + 8; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 404 | } |
| 405 | } else if (rotate == FB_ROTATE_UD) { |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 406 | for (x = 0; x < num && image->dx >= 0; x++) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 407 | info->fbops->fb_imageblit(info, image); |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 408 | image->dx -= image->width + 8; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 409 | } |
| 410 | } else if (rotate == FB_ROTATE_CW) { |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 411 | for (x = 0; |
| 412 | x < num && image->dy + image->height <= info->var.yres; |
| 413 | x++) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 414 | info->fbops->fb_imageblit(info, image); |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 415 | image->dy += image->height + 8; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 416 | } |
| 417 | } else if (rotate == FB_ROTATE_CCW) { |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 418 | for (x = 0; x < num && image->dy >= 0; x++) { |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 419 | info->fbops->fb_imageblit(info, image); |
Geert Uytterhoeven | 448d479 | 2007-05-08 00:37:56 -0700 | [diff] [blame] | 420 | image->dy -= image->height + 8; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 421 | } |
| 422 | } |
| 423 | } |
| 424 | |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 425 | static int fb_show_logo_line(struct fb_info *info, int rotate, |
| 426 | const struct linux_logo *logo, int y, |
| 427 | unsigned int n) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | { |
| 429 | u32 *palette = NULL, *saved_pseudo_palette = NULL; |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 430 | unsigned char *logo_new = NULL, *logo_rotate = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | struct fb_image image; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | |
| 433 | /* Return if the frame buffer is not mapped or suspended */ |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 434 | if (logo == NULL || info->state != FBINFO_STATE_RUNNING || |
Antonino A. Daplas | 70802c6 | 2007-05-08 00:38:14 -0700 | [diff] [blame] | 435 | info->flags & FBINFO_MODULE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | return 0; |
| 437 | |
| 438 | image.depth = 8; |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 439 | image.data = logo->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
| 441 | if (fb_logo.needs_cmapreset) |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 442 | fb_set_logocmap(info, logo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Geert Uytterhoeven | 9900abf | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 444 | if (fb_logo.needs_truepalette || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | fb_logo.needs_directpalette) { |
| 446 | palette = kmalloc(256 * 4, GFP_KERNEL); |
| 447 | if (palette == NULL) |
| 448 | return 0; |
| 449 | |
| 450 | if (fb_logo.needs_truepalette) |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 451 | fb_set_logo_truepalette(info, logo, palette); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | else |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 453 | fb_set_logo_directpalette(info, logo, palette); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
| 455 | saved_pseudo_palette = info->pseudo_palette; |
| 456 | info->pseudo_palette = palette; |
| 457 | } |
| 458 | |
| 459 | if (fb_logo.depth <= 4) { |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 460 | logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | if (logo_new == NULL) { |
| 462 | kfree(palette); |
| 463 | if (saved_pseudo_palette) |
| 464 | info->pseudo_palette = saved_pseudo_palette; |
| 465 | return 0; |
| 466 | } |
| 467 | image.data = logo_new; |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 468 | fb_set_logo(info, logo, logo_new, fb_logo.depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | } |
| 470 | |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 471 | image.dx = 0; |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 472 | image.dy = y; |
| 473 | image.width = logo->width; |
| 474 | image.height = logo->height; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 476 | if (rotate) { |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 477 | logo_rotate = kmalloc(logo->width * |
| 478 | logo->height, GFP_KERNEL); |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 479 | if (logo_rotate) |
| 480 | fb_rotate_logo(info, logo_rotate, &image, rotate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 482 | |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 483 | fb_do_show_logo(info, &image, rotate, n); |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 484 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | kfree(palette); |
| 486 | if (saved_pseudo_palette != NULL) |
| 487 | info->pseudo_palette = saved_pseudo_palette; |
| 488 | kfree(logo_new); |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 489 | kfree(logo_rotate); |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 490 | return logo->height; |
| 491 | } |
| 492 | |
Geert Uytterhoeven | 9900abf | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 493 | |
| 494 | #ifdef CONFIG_FB_LOGO_EXTRA |
| 495 | |
| 496 | #define FB_LOGO_EX_NUM_MAX 10 |
| 497 | static struct logo_data_extra { |
| 498 | const struct linux_logo *logo; |
| 499 | unsigned int n; |
| 500 | } fb_logo_ex[FB_LOGO_EX_NUM_MAX]; |
| 501 | static unsigned int fb_logo_ex_num; |
| 502 | |
| 503 | void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n) |
| 504 | { |
| 505 | if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX) |
| 506 | return; |
| 507 | |
| 508 | fb_logo_ex[fb_logo_ex_num].logo = logo; |
| 509 | fb_logo_ex[fb_logo_ex_num].n = n; |
| 510 | fb_logo_ex_num++; |
| 511 | } |
| 512 | |
| 513 | static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height, |
| 514 | unsigned int yres) |
| 515 | { |
| 516 | unsigned int i; |
| 517 | |
| 518 | /* FIXME: logo_ex supports only truecolor fb. */ |
| 519 | if (info->fix.visual != FB_VISUAL_TRUECOLOR) |
| 520 | fb_logo_ex_num = 0; |
| 521 | |
| 522 | for (i = 0; i < fb_logo_ex_num; i++) { |
Geert Uytterhoeven | 4fb6de2 | 2009-01-06 14:42:37 -0800 | [diff] [blame] | 523 | if (fb_logo_ex[i].logo->type != fb_logo.logo->type) { |
| 524 | fb_logo_ex[i].logo = NULL; |
| 525 | continue; |
| 526 | } |
Geert Uytterhoeven | 9900abf | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 527 | height += fb_logo_ex[i].logo->height; |
| 528 | if (height > yres) { |
| 529 | height -= fb_logo_ex[i].logo->height; |
| 530 | fb_logo_ex_num = i; |
| 531 | break; |
| 532 | } |
| 533 | } |
| 534 | return height; |
| 535 | } |
| 536 | |
| 537 | static int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
| 538 | { |
| 539 | unsigned int i; |
| 540 | |
| 541 | for (i = 0; i < fb_logo_ex_num; i++) |
| 542 | y += fb_show_logo_line(info, rotate, |
| 543 | fb_logo_ex[i].logo, y, fb_logo_ex[i].n); |
| 544 | |
| 545 | return y; |
| 546 | } |
| 547 | |
| 548 | #else /* !CONFIG_FB_LOGO_EXTRA */ |
| 549 | |
| 550 | static inline int fb_prepare_extra_logos(struct fb_info *info, |
| 551 | unsigned int height, |
| 552 | unsigned int yres) |
| 553 | { |
| 554 | return height; |
| 555 | } |
| 556 | |
| 557 | static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate) |
| 558 | { |
| 559 | return y; |
| 560 | } |
| 561 | |
| 562 | #endif /* CONFIG_FB_LOGO_EXTRA */ |
| 563 | |
| 564 | |
| 565 | int fb_prepare_logo(struct fb_info *info, int rotate) |
| 566 | { |
| 567 | int depth = fb_get_color_depth(&info->var, &info->fix); |
| 568 | unsigned int yres; |
| 569 | |
| 570 | memset(&fb_logo, 0, sizeof(struct logo_data)); |
| 571 | |
| 572 | if (info->flags & FBINFO_MISC_TILEBLITTING || |
| 573 | info->flags & FBINFO_MODULE) |
| 574 | return 0; |
| 575 | |
| 576 | if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) { |
| 577 | depth = info->var.blue.length; |
| 578 | if (info->var.red.length < depth) |
| 579 | depth = info->var.red.length; |
| 580 | if (info->var.green.length < depth) |
| 581 | depth = info->var.green.length; |
| 582 | } |
| 583 | |
| 584 | if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) { |
| 585 | /* assume console colormap */ |
| 586 | depth = 4; |
| 587 | } |
| 588 | |
Geert Uytterhoeven | 9900abf | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 589 | /* Return if no suitable logo was found */ |
| 590 | fb_logo.logo = fb_find_logo(depth); |
| 591 | |
| 592 | if (!fb_logo.logo) { |
| 593 | return 0; |
| 594 | } |
| 595 | |
| 596 | if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD) |
| 597 | yres = info->var.yres; |
| 598 | else |
| 599 | yres = info->var.xres; |
| 600 | |
| 601 | if (fb_logo.logo->height > yres) { |
| 602 | fb_logo.logo = NULL; |
| 603 | return 0; |
| 604 | } |
| 605 | |
| 606 | /* What depth we asked for might be different from what we get */ |
| 607 | if (fb_logo.logo->type == LINUX_LOGO_CLUT224) |
| 608 | fb_logo.depth = 8; |
| 609 | else if (fb_logo.logo->type == LINUX_LOGO_VGA16) |
| 610 | fb_logo.depth = 4; |
| 611 | else |
| 612 | fb_logo.depth = 1; |
| 613 | |
Antonino A. Daplas | 1692b37 | 2007-07-31 00:37:36 -0700 | [diff] [blame] | 614 | |
| 615 | if (fb_logo.depth > 4 && depth > 4) { |
| 616 | switch (info->fix.visual) { |
| 617 | case FB_VISUAL_TRUECOLOR: |
| 618 | fb_logo.needs_truepalette = 1; |
| 619 | break; |
| 620 | case FB_VISUAL_DIRECTCOLOR: |
| 621 | fb_logo.needs_directpalette = 1; |
| 622 | fb_logo.needs_cmapreset = 1; |
| 623 | break; |
| 624 | case FB_VISUAL_PSEUDOCOLOR: |
| 625 | fb_logo.needs_cmapreset = 1; |
| 626 | break; |
| 627 | } |
| 628 | } |
| 629 | |
Geert Uytterhoeven | 9900abf | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 630 | return fb_prepare_extra_logos(info, fb_logo.logo->height, yres); |
| 631 | } |
| 632 | |
Geert Uytterhoeven | 90da63e5 | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 633 | int fb_show_logo(struct fb_info *info, int rotate) |
| 634 | { |
Geert Uytterhoeven | 9900abf | 2007-07-17 04:05:50 -0700 | [diff] [blame] | 635 | int y; |
| 636 | |
| 637 | y = fb_show_logo_line(info, rotate, fb_logo.logo, 0, |
| 638 | num_online_cpus()); |
| 639 | y = fb_show_extra_logos(info, y, rotate); |
| 640 | |
| 641 | return y; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | } |
| 643 | #else |
Antonino A. Daplas | 9c44e5f | 2005-11-08 21:39:10 -0800 | [diff] [blame] | 644 | int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; } |
| 645 | int fb_show_logo(struct fb_info *info, int rotate) { return 0; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | #endif /* CONFIG_LOGO */ |
| 647 | |
Alexey Dobriyan | 0aa1634 | 2008-04-28 02:15:42 -0700 | [diff] [blame] | 648 | static void *fb_seq_start(struct seq_file *m, loff_t *pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | { |
Alexey Dobriyan | 0aa1634 | 2008-04-28 02:15:42 -0700 | [diff] [blame] | 650 | return (*pos < FB_MAX) ? pos : NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | } |
| 652 | |
Alexey Dobriyan | 0aa1634 | 2008-04-28 02:15:42 -0700 | [diff] [blame] | 653 | static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos) |
| 654 | { |
| 655 | (*pos)++; |
| 656 | return (*pos < FB_MAX) ? pos : NULL; |
| 657 | } |
| 658 | |
| 659 | static void fb_seq_stop(struct seq_file *m, void *v) |
| 660 | { |
| 661 | } |
| 662 | |
| 663 | static int fb_seq_show(struct seq_file *m, void *v) |
| 664 | { |
| 665 | int i = *(loff_t *)v; |
| 666 | struct fb_info *fi = registered_fb[i]; |
| 667 | |
| 668 | if (fi) |
| 669 | seq_printf(m, "%d %s\n", fi->node, fi->fix.id); |
| 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | static const struct seq_operations proc_fb_seq_ops = { |
| 674 | .start = fb_seq_start, |
| 675 | .next = fb_seq_next, |
| 676 | .stop = fb_seq_stop, |
| 677 | .show = fb_seq_show, |
| 678 | }; |
| 679 | |
| 680 | static int proc_fb_open(struct inode *inode, struct file *file) |
| 681 | { |
| 682 | return seq_open(file, &proc_fb_seq_ops); |
| 683 | } |
| 684 | |
| 685 | static const struct file_operations fb_proc_fops = { |
| 686 | .owner = THIS_MODULE, |
| 687 | .open = proc_fb_open, |
| 688 | .read = seq_read, |
| 689 | .llseek = seq_lseek, |
| 690 | .release = seq_release, |
| 691 | }; |
| 692 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | static ssize_t |
| 694 | fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) |
| 695 | { |
| 696 | unsigned long p = *ppos; |
Josef Sipek | ad9a824 | 2006-12-08 02:37:48 -0800 | [diff] [blame] | 697 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | int fbidx = iminor(inode); |
| 699 | struct fb_info *info = registered_fb[fbidx]; |
James Hogan | f11b478 | 2010-10-27 15:33:28 -0700 | [diff] [blame] | 700 | u8 *buffer, *dst; |
| 701 | u8 __iomem *src; |
| 702 | int c, cnt = 0, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | unsigned long total_size; |
| 704 | |
| 705 | if (!info || ! info->screen_base) |
| 706 | return -ENODEV; |
| 707 | |
| 708 | if (info->state != FBINFO_STATE_RUNNING) |
| 709 | return -EPERM; |
| 710 | |
| 711 | if (info->fbops->fb_read) |
Antonino A. Daplas | 3f9b088 | 2007-05-08 00:39:02 -0700 | [diff] [blame] | 712 | return info->fbops->fb_read(info, buf, count, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | |
| 714 | total_size = info->screen_size; |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 715 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | if (total_size == 0) |
| 717 | total_size = info->fix.smem_len; |
| 718 | |
| 719 | if (p >= total_size) |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 720 | return 0; |
| 721 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | if (count >= total_size) |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 723 | count = total_size; |
| 724 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | if (count + p > total_size) |
| 726 | count = total_size - p; |
| 727 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 728 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
| 729 | GFP_KERNEL); |
| 730 | if (!buffer) |
| 731 | return -ENOMEM; |
| 732 | |
James Hogan | f11b478 | 2010-10-27 15:33:28 -0700 | [diff] [blame] | 733 | src = (u8 __iomem *) (info->screen_base + p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | |
| 735 | if (info->fbops->fb_sync) |
| 736 | info->fbops->fb_sync(info); |
| 737 | |
| 738 | while (count) { |
| 739 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; |
| 740 | dst = buffer; |
James Hogan | f11b478 | 2010-10-27 15:33:28 -0700 | [diff] [blame] | 741 | fb_memcpy_fromfb(dst, src, c); |
| 742 | dst += c; |
| 743 | src += c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 744 | |
| 745 | if (copy_to_user(buf, buffer, c)) { |
| 746 | err = -EFAULT; |
| 747 | break; |
| 748 | } |
| 749 | *ppos += c; |
| 750 | buf += c; |
| 751 | cnt += c; |
| 752 | count -= c; |
| 753 | } |
| 754 | |
| 755 | kfree(buffer); |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 756 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | return (err) ? err : cnt; |
| 758 | } |
| 759 | |
| 760 | static ssize_t |
| 761 | fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos) |
| 762 | { |
| 763 | unsigned long p = *ppos; |
Josef Sipek | ad9a824 | 2006-12-08 02:37:48 -0800 | [diff] [blame] | 764 | struct inode *inode = file->f_path.dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 765 | int fbidx = iminor(inode); |
| 766 | struct fb_info *info = registered_fb[fbidx]; |
James Hogan | f11b478 | 2010-10-27 15:33:28 -0700 | [diff] [blame] | 767 | u8 *buffer, *src; |
| 768 | u8 __iomem *dst; |
| 769 | int c, cnt = 0, err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | unsigned long total_size; |
| 771 | |
| 772 | if (!info || !info->screen_base) |
| 773 | return -ENODEV; |
| 774 | |
| 775 | if (info->state != FBINFO_STATE_RUNNING) |
| 776 | return -EPERM; |
| 777 | |
| 778 | if (info->fbops->fb_write) |
Antonino A. Daplas | 3f9b088 | 2007-05-08 00:39:02 -0700 | [diff] [blame] | 779 | return info->fbops->fb_write(info, buf, count, ppos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
| 781 | total_size = info->screen_size; |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | if (total_size == 0) |
| 784 | total_size = info->fix.smem_len; |
| 785 | |
| 786 | if (p > total_size) |
Antonino A. Daplas | 6a2a886 | 2006-04-18 22:22:12 -0700 | [diff] [blame] | 787 | return -EFBIG; |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 788 | |
Antonino A. Daplas | 6a2a886 | 2006-04-18 22:22:12 -0700 | [diff] [blame] | 789 | if (count > total_size) { |
| 790 | err = -EFBIG; |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 791 | count = total_size; |
Antonino A. Daplas | 6a2a886 | 2006-04-18 22:22:12 -0700 | [diff] [blame] | 792 | } |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 793 | |
Antonino A. Daplas | 6a2a886 | 2006-04-18 22:22:12 -0700 | [diff] [blame] | 794 | if (count + p > total_size) { |
| 795 | if (!err) |
| 796 | err = -ENOSPC; |
| 797 | |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 798 | count = total_size - p; |
Antonino A. Daplas | 6a2a886 | 2006-04-18 22:22:12 -0700 | [diff] [blame] | 799 | } |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 800 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, |
| 802 | GFP_KERNEL); |
| 803 | if (!buffer) |
| 804 | return -ENOMEM; |
| 805 | |
James Hogan | f11b478 | 2010-10-27 15:33:28 -0700 | [diff] [blame] | 806 | dst = (u8 __iomem *) (info->screen_base + p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
| 808 | if (info->fbops->fb_sync) |
| 809 | info->fbops->fb_sync(info); |
| 810 | |
| 811 | while (count) { |
| 812 | c = (count > PAGE_SIZE) ? PAGE_SIZE : count; |
| 813 | src = buffer; |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 814 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | if (copy_from_user(src, buf, c)) { |
| 816 | err = -EFAULT; |
| 817 | break; |
| 818 | } |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 819 | |
James Hogan | f11b478 | 2010-10-27 15:33:28 -0700 | [diff] [blame] | 820 | fb_memcpy_tofb(dst, src, c); |
| 821 | dst += c; |
| 822 | src += c; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | *ppos += c; |
| 824 | buf += c; |
| 825 | cnt += c; |
| 826 | count -= c; |
| 827 | } |
Antonino A. Daplas | 0a484a3 | 2006-01-09 20:53:37 -0800 | [diff] [blame] | 828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | kfree(buffer); |
| 830 | |
Antonino A. Daplas | 6a2a886 | 2006-04-18 22:22:12 -0700 | [diff] [blame] | 831 | return (cnt) ? cnt : err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | } |
| 833 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | int |
| 835 | fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var) |
| 836 | { |
Antonino A. Daplas | 1207069 | 2005-12-12 22:17:17 -0800 | [diff] [blame] | 837 | struct fb_fix_screeninfo *fix = &info->fix; |
Ville Syrjala | 7572a1e | 2008-07-23 21:31:28 -0700 | [diff] [blame] | 838 | unsigned int yres = info->var.yres; |
| 839 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 840 | |
Antonino A. Daplas | 1207069 | 2005-12-12 22:17:17 -0800 | [diff] [blame] | 841 | if (var->yoffset > 0) { |
| 842 | if (var->vmode & FB_VMODE_YWRAP) { |
| 843 | if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep)) |
| 844 | err = -EINVAL; |
| 845 | else |
| 846 | yres = 0; |
| 847 | } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep)) |
| 848 | err = -EINVAL; |
| 849 | } |
| 850 | |
| 851 | if (var->xoffset > 0 && (!fix->xpanstep || |
| 852 | (var->xoffset % fix->xpanstep))) |
| 853 | err = -EINVAL; |
| 854 | |
Ville Syrjala | 7572a1e | 2008-07-23 21:31:28 -0700 | [diff] [blame] | 855 | if (err || !info->fbops->fb_pan_display || |
Florian Tobias Schandinat | 99e9e7d | 2009-09-22 16:47:41 -0700 | [diff] [blame] | 856 | var->yoffset > info->var.yres_virtual - yres || |
| 857 | var->xoffset > info->var.xres_virtual - info->var.xres) |
Antonino A. Daplas | 1207069 | 2005-12-12 22:17:17 -0800 | [diff] [blame] | 858 | return -EINVAL; |
| 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | if ((err = info->fbops->fb_pan_display(var, info))) |
| 861 | return err; |
James Hogan | c9c62dc | 2010-10-27 15:33:27 -0700 | [diff] [blame] | 862 | info->var.xoffset = var->xoffset; |
| 863 | info->var.yoffset = var->yoffset; |
| 864 | if (var->vmode & FB_VMODE_YWRAP) |
| 865 | info->var.vmode |= FB_VMODE_YWRAP; |
| 866 | else |
| 867 | info->var.vmode &= ~FB_VMODE_YWRAP; |
| 868 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 869 | } |
| 870 | |
Antonino A. Daplas | 38a3dc5 | 2007-05-08 00:39:37 -0700 | [diff] [blame] | 871 | static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var, |
| 872 | u32 activate) |
| 873 | { |
| 874 | struct fb_event event; |
| 875 | struct fb_blit_caps caps, fbcaps; |
| 876 | int err = 0; |
| 877 | |
| 878 | memset(&caps, 0, sizeof(caps)); |
| 879 | memset(&fbcaps, 0, sizeof(fbcaps)); |
| 880 | caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0; |
| 881 | event.info = info; |
| 882 | event.data = ∩︀ |
| 883 | fb_notifier_call_chain(FB_EVENT_GET_REQ, &event); |
| 884 | info->fbops->fb_get_caps(info, &fbcaps, var); |
| 885 | |
| 886 | if (((fbcaps.x ^ caps.x) & caps.x) || |
| 887 | ((fbcaps.y ^ caps.y) & caps.y) || |
| 888 | (fbcaps.len < caps.len)) |
| 889 | err = -EINVAL; |
| 890 | |
| 891 | return err; |
| 892 | } |
| 893 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | int |
| 895 | fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var) |
| 896 | { |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 897 | int flags = info->flags; |
| 898 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | |
| 900 | if (var->activate & FB_ACTIVATE_INV_MODE) { |
| 901 | struct fb_videomode mode1, mode2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | |
| 903 | fb_var_to_videomode(&mode1, var); |
| 904 | fb_var_to_videomode(&mode2, &info->var); |
| 905 | /* make sure we don't delete the videomode of current var */ |
| 906 | ret = fb_mode_is_equal(&mode1, &mode2); |
| 907 | |
| 908 | if (!ret) { |
| 909 | struct fb_event event; |
| 910 | |
| 911 | event.info = info; |
| 912 | event.data = &mode1; |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 913 | ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | } |
| 915 | |
| 916 | if (!ret) |
| 917 | fb_delete_videomode(&mode1, &info->modelist); |
| 918 | |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 919 | |
| 920 | ret = (ret) ? -EINVAL : 0; |
| 921 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | } |
| 923 | |
| 924 | if ((var->activate & FB_ACTIVATE_FORCE) || |
| 925 | memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) { |
Antonino A. Daplas | 4941cb7 | 2007-05-08 00:39:22 -0700 | [diff] [blame] | 926 | u32 activate = var->activate; |
| 927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 928 | if (!info->fbops->fb_check_var) { |
| 929 | *var = info->var; |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 930 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | } |
| 932 | |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 933 | ret = info->fbops->fb_check_var(var, info); |
| 934 | |
| 935 | if (ret) |
| 936 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
| 938 | if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) { |
Florian Tobias Schandinat | 0fcf6ad | 2009-09-22 16:47:44 -0700 | [diff] [blame] | 939 | struct fb_var_screeninfo old_var; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 940 | struct fb_videomode mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Antonino A. Daplas | 38a3dc5 | 2007-05-08 00:39:37 -0700 | [diff] [blame] | 942 | if (info->fbops->fb_get_caps) { |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 943 | ret = fb_check_caps(info, var, activate); |
Antonino A. Daplas | 38a3dc5 | 2007-05-08 00:39:37 -0700 | [diff] [blame] | 944 | |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 945 | if (ret) |
Antonino A. Daplas | 38a3dc5 | 2007-05-08 00:39:37 -0700 | [diff] [blame] | 946 | goto done; |
| 947 | } |
| 948 | |
Florian Tobias Schandinat | 0fcf6ad | 2009-09-22 16:47:44 -0700 | [diff] [blame] | 949 | old_var = info->var; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | info->var = *var; |
Antonino A. Daplas | 38a3dc5 | 2007-05-08 00:39:37 -0700 | [diff] [blame] | 951 | |
Florian Tobias Schandinat | 0fcf6ad | 2009-09-22 16:47:44 -0700 | [diff] [blame] | 952 | if (info->fbops->fb_set_par) { |
| 953 | ret = info->fbops->fb_set_par(info); |
| 954 | |
| 955 | if (ret) { |
| 956 | info->var = old_var; |
| 957 | printk(KERN_WARNING "detected " |
| 958 | "fb_set_par error, " |
| 959 | "error code: %d\n", ret); |
| 960 | goto done; |
| 961 | } |
| 962 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | |
| 964 | fb_pan_display(info, &info->var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 965 | fb_set_cmap(&info->cmap, info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | fb_var_to_videomode(&mode, &info->var); |
| 967 | |
| 968 | if (info->modelist.prev && info->modelist.next && |
| 969 | !list_empty(&info->modelist)) |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 970 | ret = fb_add_videomode(&mode, &info->modelist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 972 | if (!ret && (flags & FBINFO_MISC_USEREVENT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | struct fb_event event; |
Antonino A. Daplas | 4941cb7 | 2007-05-08 00:39:22 -0700 | [diff] [blame] | 974 | int evnt = (activate & FB_ACTIVATE_ALL) ? |
Antonino A. Daplas | 7726e9e | 2005-09-09 13:04:29 -0700 | [diff] [blame] | 975 | FB_EVENT_MODE_CHANGE_ALL : |
| 976 | FB_EVENT_MODE_CHANGE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | |
| 978 | info->flags &= ~FBINFO_MISC_USEREVENT; |
| 979 | event.info = info; |
Eric Miao | faa312d | 2008-08-29 04:18:43 +0800 | [diff] [blame] | 980 | event.data = &mode; |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 981 | fb_notifier_call_chain(evnt, &event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | } |
| 983 | } |
| 984 | } |
Antonino A. Daplas | 38a3dc5 | 2007-05-08 00:39:37 -0700 | [diff] [blame] | 985 | |
| 986 | done: |
Antonino A. Daplas | b1e7223 | 2007-05-08 00:39:52 -0700 | [diff] [blame] | 987 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | } |
| 989 | |
| 990 | int |
| 991 | fb_blank(struct fb_info *info, int blank) |
| 992 | { |
| 993 | int ret = -EINVAL; |
| 994 | |
| 995 | if (blank > FB_BLANK_POWERDOWN) |
| 996 | blank = FB_BLANK_POWERDOWN; |
| 997 | |
| 998 | if (info->fbops->fb_blank) |
| 999 | ret = info->fbops->fb_blank(blank, info); |
| 1000 | |
| 1001 | if (!ret) { |
| 1002 | struct fb_event event; |
| 1003 | |
| 1004 | event.info = info; |
| 1005 | event.data = ␣ |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 1006 | fb_notifier_call_chain(FB_EVENT_BLANK, &event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | } |
| 1008 | |
| 1009 | return ret; |
| 1010 | } |
| 1011 | |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1012 | static long do_fb_ioctl(struct fb_info *info, unsigned int cmd, |
| 1013 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | { |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1015 | struct fb_ops *fb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | struct fb_var_screeninfo var; |
| 1017 | struct fb_fix_screeninfo fix; |
| 1018 | struct fb_con2fbmap con2fb; |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1019 | struct fb_cmap cmap_from; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | struct fb_cmap_user cmap; |
| 1021 | struct fb_event event; |
| 1022 | void __user *argp = (void __user *)arg; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1023 | long ret = 0; |
| 1024 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | switch (cmd) { |
| 1026 | case FBIOGET_VSCREENINFO: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1027 | if (!lock_fb_info(info)) |
| 1028 | return -ENODEV; |
| 1029 | var = info->var; |
| 1030 | unlock_fb_info(info); |
| 1031 | |
| 1032 | ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1033 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | case FBIOPUT_VSCREENINFO: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1035 | if (copy_from_user(&var, argp, sizeof(var))) |
| 1036 | return -EFAULT; |
| 1037 | if (!lock_fb_info(info)) |
| 1038 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | acquire_console_sem(); |
| 1040 | info->flags |= FBINFO_MISC_USEREVENT; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1041 | ret = fb_set_var(info, &var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | info->flags &= ~FBINFO_MISC_USEREVENT; |
| 1043 | release_console_sem(); |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1044 | unlock_fb_info(info); |
| 1045 | if (!ret && copy_to_user(argp, &var, sizeof(var))) |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1046 | ret = -EFAULT; |
| 1047 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | case FBIOGET_FSCREENINFO: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1049 | if (!lock_fb_info(info)) |
| 1050 | return -ENODEV; |
| 1051 | fix = info->fix; |
| 1052 | unlock_fb_info(info); |
| 1053 | |
| 1054 | ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1055 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | case FBIOPUTCMAP: |
| 1057 | if (copy_from_user(&cmap, argp, sizeof(cmap))) |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1058 | return -EFAULT; |
| 1059 | ret = fb_set_user_cmap(&cmap, info); |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1060 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | case FBIOGETCMAP: |
| 1062 | if (copy_from_user(&cmap, argp, sizeof(cmap))) |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1063 | return -EFAULT; |
| 1064 | if (!lock_fb_info(info)) |
| 1065 | return -ENODEV; |
| 1066 | cmap_from = info->cmap; |
| 1067 | unlock_fb_info(info); |
| 1068 | ret = fb_cmap_to_user(&cmap_from, &cmap); |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1069 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | case FBIOPAN_DISPLAY: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1071 | if (copy_from_user(&var, argp, sizeof(var))) |
| 1072 | return -EFAULT; |
| 1073 | if (!lock_fb_info(info)) |
| 1074 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | acquire_console_sem(); |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1076 | ret = fb_pan_display(info, &var); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | release_console_sem(); |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1078 | unlock_fb_info(info); |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1079 | if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1080 | return -EFAULT; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1081 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1082 | case FBIO_CURSOR: |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1083 | ret = -EINVAL; |
| 1084 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | case FBIOGET_CON2FBMAP: |
| 1086 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1087 | return -EFAULT; |
| 1088 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
| 1089 | return -EINVAL; |
| 1090 | con2fb.framebuffer = -1; |
| 1091 | event.data = &con2fb; |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1092 | if (!lock_fb_info(info)) |
| 1093 | return -ENODEV; |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1094 | event.info = info; |
| 1095 | fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event); |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1096 | unlock_fb_info(info); |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1097 | ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1098 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | case FBIOPUT_CON2FBMAP: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1100 | if (copy_from_user(&con2fb, argp, sizeof(con2fb))) |
| 1101 | return -EFAULT; |
| 1102 | if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) |
| 1103 | return -EINVAL; |
| 1104 | if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) |
| 1105 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1106 | if (!registered_fb[con2fb.framebuffer]) |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1107 | request_module("fb%d", con2fb.framebuffer); |
| 1108 | if (!registered_fb[con2fb.framebuffer]) { |
| 1109 | ret = -EINVAL; |
| 1110 | break; |
| 1111 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | event.data = &con2fb; |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1113 | if (!lock_fb_info(info)) |
| 1114 | return -ENODEV; |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1115 | event.info = info; |
Andrea Righi | 66c1ca0 | 2009-03-31 15:25:18 -0700 | [diff] [blame] | 1116 | ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event); |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1117 | unlock_fb_info(info); |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1118 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | case FBIOBLANK: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1120 | if (!lock_fb_info(info)) |
| 1121 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | acquire_console_sem(); |
| 1123 | info->flags |= FBINFO_MISC_USEREVENT; |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1124 | ret = fb_blank(info, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | info->flags &= ~FBINFO_MISC_USEREVENT; |
| 1126 | release_console_sem(); |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1127 | unlock_fb_info(info); |
| 1128 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | default: |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1130 | if (!lock_fb_info(info)) |
| 1131 | return -ENODEV; |
| 1132 | fb = info->fbops; |
| 1133 | if (fb->fb_ioctl) |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1134 | ret = fb->fb_ioctl(info, cmd, arg); |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1135 | else |
| 1136 | ret = -ENOTTY; |
| 1137 | unlock_fb_info(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | } |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1139 | return ret; |
| 1140 | } |
| 1141 | |
| 1142 | static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1143 | { |
| 1144 | struct inode *inode = file->f_path.dentry->d_inode; |
| 1145 | int fbidx = iminor(inode); |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1146 | struct fb_info *info = registered_fb[fbidx]; |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1147 | |
Andrea Righi | 1f5e31d | 2009-02-04 15:12:03 -0800 | [diff] [blame] | 1148 | return do_fb_ioctl(info, cmd, arg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1149 | } |
| 1150 | |
| 1151 | #ifdef CONFIG_COMPAT |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1152 | struct fb_fix_screeninfo32 { |
| 1153 | char id[16]; |
| 1154 | compat_caddr_t smem_start; |
| 1155 | u32 smem_len; |
| 1156 | u32 type; |
| 1157 | u32 type_aux; |
| 1158 | u32 visual; |
| 1159 | u16 xpanstep; |
| 1160 | u16 ypanstep; |
| 1161 | u16 ywrapstep; |
| 1162 | u32 line_length; |
| 1163 | compat_caddr_t mmio_start; |
| 1164 | u32 mmio_len; |
| 1165 | u32 accel; |
| 1166 | u16 reserved[3]; |
| 1167 | }; |
| 1168 | |
| 1169 | struct fb_cmap32 { |
| 1170 | u32 start; |
| 1171 | u32 len; |
| 1172 | compat_caddr_t red; |
| 1173 | compat_caddr_t green; |
| 1174 | compat_caddr_t blue; |
| 1175 | compat_caddr_t transp; |
| 1176 | }; |
| 1177 | |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1178 | static int fb_getput_cmap(struct fb_info *info, unsigned int cmd, |
| 1179 | unsigned long arg) |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1180 | { |
| 1181 | struct fb_cmap_user __user *cmap; |
| 1182 | struct fb_cmap32 __user *cmap32; |
| 1183 | __u32 data; |
| 1184 | int err; |
| 1185 | |
| 1186 | cmap = compat_alloc_user_space(sizeof(*cmap)); |
| 1187 | cmap32 = compat_ptr(arg); |
| 1188 | |
| 1189 | if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32))) |
| 1190 | return -EFAULT; |
| 1191 | |
| 1192 | if (get_user(data, &cmap32->red) || |
| 1193 | put_user(compat_ptr(data), &cmap->red) || |
| 1194 | get_user(data, &cmap32->green) || |
| 1195 | put_user(compat_ptr(data), &cmap->green) || |
| 1196 | get_user(data, &cmap32->blue) || |
| 1197 | put_user(compat_ptr(data), &cmap->blue) || |
| 1198 | get_user(data, &cmap32->transp) || |
| 1199 | put_user(compat_ptr(data), &cmap->transp)) |
| 1200 | return -EFAULT; |
| 1201 | |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1202 | err = do_fb_ioctl(info, cmd, (unsigned long) cmap); |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1203 | |
| 1204 | if (!err) { |
| 1205 | if (copy_in_user(&cmap32->start, |
| 1206 | &cmap->start, |
| 1207 | 2 * sizeof(__u32))) |
| 1208 | err = -EFAULT; |
| 1209 | } |
| 1210 | return err; |
| 1211 | } |
| 1212 | |
| 1213 | static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix, |
| 1214 | struct fb_fix_screeninfo32 __user *fix32) |
| 1215 | { |
| 1216 | __u32 data; |
| 1217 | int err; |
| 1218 | |
| 1219 | err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id)); |
| 1220 | |
| 1221 | data = (__u32) (unsigned long) fix->smem_start; |
| 1222 | err |= put_user(data, &fix32->smem_start); |
| 1223 | |
| 1224 | err |= put_user(fix->smem_len, &fix32->smem_len); |
| 1225 | err |= put_user(fix->type, &fix32->type); |
| 1226 | err |= put_user(fix->type_aux, &fix32->type_aux); |
| 1227 | err |= put_user(fix->visual, &fix32->visual); |
| 1228 | err |= put_user(fix->xpanstep, &fix32->xpanstep); |
| 1229 | err |= put_user(fix->ypanstep, &fix32->ypanstep); |
| 1230 | err |= put_user(fix->ywrapstep, &fix32->ywrapstep); |
| 1231 | err |= put_user(fix->line_length, &fix32->line_length); |
| 1232 | |
| 1233 | data = (__u32) (unsigned long) fix->mmio_start; |
| 1234 | err |= put_user(data, &fix32->mmio_start); |
| 1235 | |
| 1236 | err |= put_user(fix->mmio_len, &fix32->mmio_len); |
| 1237 | err |= put_user(fix->accel, &fix32->accel); |
| 1238 | err |= copy_to_user(fix32->reserved, fix->reserved, |
| 1239 | sizeof(fix->reserved)); |
| 1240 | |
| 1241 | return err; |
| 1242 | } |
| 1243 | |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1244 | static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd, |
| 1245 | unsigned long arg) |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1246 | { |
| 1247 | mm_segment_t old_fs; |
| 1248 | struct fb_fix_screeninfo fix; |
| 1249 | struct fb_fix_screeninfo32 __user *fix32; |
| 1250 | int err; |
| 1251 | |
| 1252 | fix32 = compat_ptr(arg); |
| 1253 | |
| 1254 | old_fs = get_fs(); |
| 1255 | set_fs(KERNEL_DS); |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1256 | err = do_fb_ioctl(info, cmd, (unsigned long) &fix); |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1257 | set_fs(old_fs); |
| 1258 | |
| 1259 | if (!err) |
| 1260 | err = do_fscreeninfo_to_user(&fix, fix32); |
| 1261 | |
| 1262 | return err; |
| 1263 | } |
| 1264 | |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1265 | static long fb_compat_ioctl(struct file *file, unsigned int cmd, |
| 1266 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | { |
Josef Sipek | ad9a824 | 2006-12-08 02:37:48 -0800 | [diff] [blame] | 1268 | struct inode *inode = file->f_path.dentry->d_inode; |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1269 | int fbidx = iminor(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | struct fb_info *info = registered_fb[fbidx]; |
| 1271 | struct fb_ops *fb = info->fbops; |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1272 | long ret = -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1274 | switch(cmd) { |
| 1275 | case FBIOGET_VSCREENINFO: |
| 1276 | case FBIOPUT_VSCREENINFO: |
| 1277 | case FBIOPAN_DISPLAY: |
| 1278 | case FBIOGET_CON2FBMAP: |
| 1279 | case FBIOPUT_CON2FBMAP: |
| 1280 | arg = (unsigned long) compat_ptr(arg); |
| 1281 | case FBIOBLANK: |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1282 | ret = do_fb_ioctl(info, cmd, arg); |
| 1283 | break; |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1284 | |
| 1285 | case FBIOGET_FSCREENINFO: |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1286 | ret = fb_get_fscreeninfo(info, cmd, arg); |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1287 | break; |
| 1288 | |
| 1289 | case FBIOGETCMAP: |
| 1290 | case FBIOPUTCMAP: |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1291 | ret = fb_getput_cmap(info, cmd, arg); |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1292 | break; |
| 1293 | |
| 1294 | default: |
| 1295 | if (fb->fb_compat_ioctl) |
Christoph Hellwig | 67a6680 | 2006-01-14 13:21:25 -0800 | [diff] [blame] | 1296 | ret = fb->fb_compat_ioctl(info, cmd, arg); |
Arnd Bergmann | c7f82d9 | 2005-11-08 21:39:19 -0800 | [diff] [blame] | 1297 | break; |
| 1298 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | return ret; |
| 1300 | } |
| 1301 | #endif |
| 1302 | |
Antonino A. Daplas | 10eb265 | 2007-07-17 04:05:27 -0700 | [diff] [blame] | 1303 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | fb_mmap(struct file *file, struct vm_area_struct * vma) |
| 1305 | { |
Josef Sipek | ad9a824 | 2006-12-08 02:37:48 -0800 | [diff] [blame] | 1306 | int fbidx = iminor(file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | struct fb_info *info = registered_fb[fbidx]; |
| 1308 | struct fb_ops *fb = info->fbops; |
| 1309 | unsigned long off; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | unsigned long start; |
| 1311 | u32 len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | |
| 1313 | if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) |
| 1314 | return -EINVAL; |
| 1315 | off = vma->vm_pgoff << PAGE_SHIFT; |
| 1316 | if (!fb) |
| 1317 | return -ENODEV; |
Krzysztof Helt | 537a1bf | 2009-06-30 11:41:29 -0700 | [diff] [blame] | 1318 | mutex_lock(&info->mm_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | if (fb->fb_mmap) { |
| 1320 | int res; |
Christoph Hellwig | 216d526 | 2006-01-14 13:21:25 -0800 | [diff] [blame] | 1321 | res = fb->fb_mmap(info, vma); |
Krzysztof Helt | 537a1bf | 2009-06-30 11:41:29 -0700 | [diff] [blame] | 1322 | mutex_unlock(&info->mm_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | return res; |
| 1324 | } |
| 1325 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | /* frame buffer memory */ |
| 1327 | start = info->fix.smem_start; |
| 1328 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len); |
| 1329 | if (off >= len) { |
| 1330 | /* memory mapped io */ |
| 1331 | off -= len; |
| 1332 | if (info->var.accel_flags) { |
Krzysztof Helt | 537a1bf | 2009-06-30 11:41:29 -0700 | [diff] [blame] | 1333 | mutex_unlock(&info->mm_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | return -EINVAL; |
| 1335 | } |
| 1336 | start = info->fix.mmio_start; |
| 1337 | len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len); |
| 1338 | } |
Krzysztof Helt | 537a1bf | 2009-06-30 11:41:29 -0700 | [diff] [blame] | 1339 | mutex_unlock(&info->mm_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | start &= PAGE_MASK; |
| 1341 | if ((vma->vm_end - vma->vm_start + off) > len) |
| 1342 | return -EINVAL; |
| 1343 | off += start; |
| 1344 | vma->vm_pgoff = off >> PAGE_SHIFT; |
| 1345 | /* This is an IO map - tell maydump to skip this VMA */ |
| 1346 | vma->vm_flags |= VM_IO | VM_RESERVED; |
Daniel De Graaf | c07fbfd | 2010-08-10 18:02:45 -0700 | [diff] [blame] | 1347 | vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); |
Antonino A. Daplas | 10eb265 | 2007-07-17 04:05:27 -0700 | [diff] [blame] | 1348 | fb_pgprotect(file, vma, off); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT, |
| 1350 | vma->vm_end - vma->vm_start, vma->vm_page_prot)) |
| 1351 | return -EAGAIN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | } |
| 1354 | |
| 1355 | static int |
| 1356 | fb_open(struct inode *inode, struct file *file) |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1357 | __acquires(&info->lock) |
| 1358 | __releases(&info->lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1359 | { |
| 1360 | int fbidx = iminor(inode); |
| 1361 | struct fb_info *info; |
| 1362 | int res = 0; |
| 1363 | |
| 1364 | if (fbidx >= FB_MAX) |
| 1365 | return -ENODEV; |
Krzysztof Helt | 3e680aa | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1366 | info = registered_fb[fbidx]; |
| 1367 | if (!info) |
Johannes Berg | a65e5d7 | 2008-07-09 10:28:38 +0200 | [diff] [blame] | 1368 | request_module("fb%d", fbidx); |
Krzysztof Helt | 3e680aa | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1369 | info = registered_fb[fbidx]; |
| 1370 | if (!info) |
| 1371 | return -ENODEV; |
| 1372 | mutex_lock(&info->lock); |
Jonathan Corbet | fc7f687 | 2008-05-15 16:30:36 -0600 | [diff] [blame] | 1373 | if (!try_module_get(info->fbops->owner)) { |
| 1374 | res = -ENODEV; |
| 1375 | goto out; |
| 1376 | } |
Thomas Koeller | cae8a12 | 2006-01-09 20:53:48 -0800 | [diff] [blame] | 1377 | file->private_data = info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | if (info->fbops->fb_open) { |
| 1379 | res = info->fbops->fb_open(info,1); |
| 1380 | if (res) |
| 1381 | module_put(info->fbops->owner); |
| 1382 | } |
Ian Campbell | d847471 | 2008-08-20 14:09:23 -0700 | [diff] [blame] | 1383 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1384 | if (info->fbdefio) |
| 1385 | fb_deferred_io_open(info, inode, file); |
| 1386 | #endif |
Jonathan Corbet | fc7f687 | 2008-05-15 16:30:36 -0600 | [diff] [blame] | 1387 | out: |
Krzysztof Helt | 3e680aa | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1388 | mutex_unlock(&info->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1389 | return res; |
| 1390 | } |
| 1391 | |
| 1392 | static int |
| 1393 | fb_release(struct inode *inode, struct file *file) |
Geert Uytterhoeven | a684e7d | 2008-11-06 12:53:37 -0800 | [diff] [blame] | 1394 | __acquires(&info->lock) |
| 1395 | __releases(&info->lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | { |
Thomas Koeller | cae8a12 | 2006-01-09 20:53:48 -0800 | [diff] [blame] | 1397 | struct fb_info * const info = file->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | |
Krzysztof Helt | 3e680aa | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1399 | mutex_lock(&info->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | if (info->fbops->fb_release) |
| 1401 | info->fbops->fb_release(info,1); |
| 1402 | module_put(info->fbops->owner); |
Krzysztof Helt | 3e680aa | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1403 | mutex_unlock(&info->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | return 0; |
| 1405 | } |
| 1406 | |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 1407 | static const struct file_operations fb_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | .owner = THIS_MODULE, |
| 1409 | .read = fb_read, |
| 1410 | .write = fb_write, |
Alan Cox | e536771 | 2008-10-18 20:27:51 -0700 | [diff] [blame] | 1411 | .unlocked_ioctl = fb_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1412 | #ifdef CONFIG_COMPAT |
| 1413 | .compat_ioctl = fb_compat_ioctl, |
| 1414 | #endif |
| 1415 | .mmap = fb_mmap, |
| 1416 | .open = fb_open, |
| 1417 | .release = fb_release, |
| 1418 | #ifdef HAVE_ARCH_FB_UNMAPPED_AREA |
| 1419 | .get_unmapped_area = get_fb_unmapped_area, |
| 1420 | #endif |
Paul Mundt | 5e841b8 | 2007-05-08 00:37:41 -0700 | [diff] [blame] | 1421 | #ifdef CONFIG_FB_DEFERRED_IO |
| 1422 | .fsync = fb_deferred_io_fsync, |
| 1423 | #endif |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1424 | .llseek = default_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | }; |
| 1426 | |
Antonino A. Daplas | 9a17917 | 2006-06-26 00:27:05 -0700 | [diff] [blame] | 1427 | struct class *fb_class; |
| 1428 | EXPORT_SYMBOL(fb_class); |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 1429 | |
| 1430 | static int fb_check_foreignness(struct fb_info *fi) |
| 1431 | { |
| 1432 | const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN; |
| 1433 | |
| 1434 | fi->flags &= ~FBINFO_FOREIGN_ENDIAN; |
| 1435 | |
| 1436 | #ifdef __BIG_ENDIAN |
| 1437 | fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH; |
| 1438 | #else |
| 1439 | fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0; |
| 1440 | #endif /* __BIG_ENDIAN */ |
| 1441 | |
| 1442 | if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) { |
| 1443 | pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to " |
| 1444 | "support this framebuffer\n", fi->fix.id); |
| 1445 | return -ENOSYS; |
| 1446 | } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) { |
| 1447 | pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to " |
| 1448 | "support this framebuffer\n", fi->fix.id); |
| 1449 | return -ENOSYS; |
| 1450 | } |
| 1451 | |
| 1452 | return 0; |
| 1453 | } |
| 1454 | |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1455 | static bool apertures_overlap(struct aperture *gen, struct aperture *hw) |
Dave Airlie | 4410f39 | 2009-06-16 15:34:38 -0700 | [diff] [blame] | 1456 | { |
| 1457 | /* is the generic aperture base the same as the HW one */ |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1458 | if (gen->base == hw->base) |
Dave Airlie | 4410f39 | 2009-06-16 15:34:38 -0700 | [diff] [blame] | 1459 | return true; |
| 1460 | /* is the generic aperture base inside the hw base->hw base+size */ |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1461 | if (gen->base > hw->base && gen->base <= hw->base + hw->size) |
Dave Airlie | 4410f39 | 2009-06-16 15:34:38 -0700 | [diff] [blame] | 1462 | return true; |
| 1463 | return false; |
| 1464 | } |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1465 | |
Marcin Slusarz | 06415c5 | 2010-05-16 17:29:56 +0200 | [diff] [blame] | 1466 | static bool fb_do_apertures_overlap(struct apertures_struct *gena, |
| 1467 | struct apertures_struct *hwa) |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1468 | { |
| 1469 | int i, j; |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1470 | if (!hwa || !gena) |
| 1471 | return false; |
| 1472 | |
| 1473 | for (i = 0; i < hwa->count; ++i) { |
| 1474 | struct aperture *h = &hwa->ranges[i]; |
| 1475 | for (j = 0; j < gena->count; ++j) { |
| 1476 | struct aperture *g = &gena->ranges[j]; |
| 1477 | printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n", |
Randy Dunlap | f4b87de | 2010-05-21 12:44:47 -0700 | [diff] [blame] | 1478 | (unsigned long long)g->base, |
| 1479 | (unsigned long long)g->size, |
| 1480 | (unsigned long long)h->base, |
| 1481 | (unsigned long long)h->size); |
Marcin Slusarz | 1471ca9 | 2010-05-16 17:27:03 +0200 | [diff] [blame] | 1482 | if (apertures_overlap(g, h)) |
| 1483 | return true; |
| 1484 | } |
| 1485 | } |
| 1486 | |
| 1487 | return false; |
| 1488 | } |
| 1489 | |
Marcin Slusarz | 3b9676e | 2010-05-16 17:33:09 +0200 | [diff] [blame] | 1490 | #define VGA_FB_PHYS 0xA0000 |
| 1491 | void remove_conflicting_framebuffers(struct apertures_struct *a, |
| 1492 | const char *name, bool primary) |
Marcin Slusarz | 06415c5 | 2010-05-16 17:29:56 +0200 | [diff] [blame] | 1493 | { |
| 1494 | int i; |
| 1495 | |
| 1496 | /* check all firmware fbs and kick off if the base addr overlaps */ |
| 1497 | for (i = 0 ; i < FB_MAX; i++) { |
Marcin Slusarz | 3b9676e | 2010-05-16 17:33:09 +0200 | [diff] [blame] | 1498 | struct apertures_struct *gen_aper; |
Marcin Slusarz | 06415c5 | 2010-05-16 17:29:56 +0200 | [diff] [blame] | 1499 | if (!registered_fb[i]) |
| 1500 | continue; |
| 1501 | |
| 1502 | if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE)) |
| 1503 | continue; |
| 1504 | |
Marcin Slusarz | 3b9676e | 2010-05-16 17:33:09 +0200 | [diff] [blame] | 1505 | gen_aper = registered_fb[i]->apertures; |
| 1506 | if (fb_do_apertures_overlap(gen_aper, a) || |
| 1507 | (primary && gen_aper && gen_aper->count && |
| 1508 | gen_aper->ranges[0].base == VGA_FB_PHYS)) { |
| 1509 | |
Marcin Slusarz | 06415c5 | 2010-05-16 17:29:56 +0200 | [diff] [blame] | 1510 | printk(KERN_ERR "fb: conflicting fb hw usage " |
| 1511 | "%s vs %s - removing generic driver\n", |
| 1512 | name, registered_fb[i]->fix.id); |
| 1513 | unregister_framebuffer(registered_fb[i]); |
| 1514 | } |
| 1515 | } |
| 1516 | } |
| 1517 | EXPORT_SYMBOL(remove_conflicting_framebuffers); |
| 1518 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | /** |
| 1520 | * register_framebuffer - registers a frame buffer device |
| 1521 | * @fb_info: frame buffer info structure |
| 1522 | * |
| 1523 | * Registers a frame buffer device @fb_info. |
| 1524 | * |
| 1525 | * Returns negative errno on error, or zero for success. |
| 1526 | * |
| 1527 | */ |
| 1528 | |
| 1529 | int |
| 1530 | register_framebuffer(struct fb_info *fb_info) |
| 1531 | { |
| 1532 | int i; |
| 1533 | struct fb_event event; |
Antonino A. Daplas | 96fe6a2 | 2005-09-09 13:09:58 -0700 | [diff] [blame] | 1534 | struct fb_videomode mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | |
| 1536 | if (num_registered_fb == FB_MAX) |
| 1537 | return -ENXIO; |
Anton Vorontsov | e4c690e | 2008-04-28 02:14:49 -0700 | [diff] [blame] | 1538 | |
| 1539 | if (fb_check_foreignness(fb_info)) |
| 1540 | return -ENOSYS; |
| 1541 | |
Marcin Slusarz | 3b9676e | 2010-05-16 17:33:09 +0200 | [diff] [blame] | 1542 | remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id, |
| 1543 | fb_is_primary_device(fb_info)); |
Dave Airlie | 4410f39 | 2009-06-16 15:34:38 -0700 | [diff] [blame] | 1544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | num_registered_fb++; |
| 1546 | for (i = 0 ; i < FB_MAX; i++) |
| 1547 | if (!registered_fb[i]) |
| 1548 | break; |
| 1549 | fb_info->node = i; |
Linus Torvalds | 6c96895 | 2009-07-08 09:20:11 -0700 | [diff] [blame] | 1550 | mutex_init(&fb_info->lock); |
| 1551 | mutex_init(&fb_info->mm_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1552 | |
Greg Kroah-Hartman | 77997aa | 2008-07-21 20:03:34 -0700 | [diff] [blame] | 1553 | fb_info->dev = device_create(fb_class, fb_info->device, |
| 1554 | MKDEV(FB_MAJOR, i), NULL, "fb%d", i); |
Greg Kroah-Hartman | 78cde0887 | 2006-09-14 07:30:59 -0700 | [diff] [blame] | 1555 | if (IS_ERR(fb_info->dev)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | /* Not fatal */ |
Greg Kroah-Hartman | 78cde0887 | 2006-09-14 07:30:59 -0700 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | } else |
Greg Kroah-Hartman | 78cde0887 | 2006-09-14 07:30:59 -0700 | [diff] [blame] | 1560 | fb_init_device(fb_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
James Simmons | 58a6064 | 2005-06-21 17:17:08 -0700 | [diff] [blame] | 1568 | fb_info->pixmap.access_align = 32; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | fb_info->pixmap.flags = FB_PIXMAP_DEFAULT; |
| 1570 | } |
| 1571 | } |
| 1572 | fb_info->pixmap.offset = 0; |
| 1573 | |
Antonino A. Daplas | bf26ad7 | 2007-05-08 00:39:09 -0700 | [diff] [blame] | 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 | |
Antonino A. Daplas | 96fe6a2 | 2005-09-09 13:09:58 -0700 | [diff] [blame] | 1580 | if (!fb_info->modelist.prev || !fb_info->modelist.next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | INIT_LIST_HEAD(&fb_info->modelist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1582 | |
Antonino A. Daplas | 96fe6a2 | 2005-09-09 13:09:58 -0700 | [diff] [blame] | 1583 | fb_var_to_videomode(&mode, &fb_info->var); |
| 1584 | fb_add_videomode(&mode, &fb_info->modelist); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1585 | registered_fb[i] = fb_info; |
| 1586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | event.info = fb_info; |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1588 | if (!lock_fb_info(fb_info)) |
| 1589 | return -ENODEV; |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 1590 | fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event); |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1591 | unlock_fb_info(fb_info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | return 0; |
| 1593 | } |
| 1594 | |
| 1595 | |
| 1596 | /** |
| 1597 | * unregister_framebuffer - releases a frame buffer device |
| 1598 | * @fb_info: frame buffer info structure |
| 1599 | * |
| 1600 | * Unregisters a frame buffer device @fb_info. |
| 1601 | * |
| 1602 | * Returns negative errno on error, or zero for success. |
| 1603 | * |
Jesse Barnes | cfafca8 | 2007-07-17 04:05:33 -0700 | [diff] [blame] | 1604 | * This function will also notify the framebuffer console |
| 1605 | * to release the driver. |
| 1606 | * |
| 1607 | * This is meant to be called within a driver's module_exit() |
| 1608 | * function. If this is called outside module_exit(), ensure |
| 1609 | * that the driver implements fb_open() and fb_release() to |
| 1610 | * check that no processes are using the device. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | */ |
| 1612 | |
| 1613 | int |
| 1614 | unregister_framebuffer(struct fb_info *fb_info) |
| 1615 | { |
Antonino A. Daplas | e614b18 | 2006-06-26 00:27:09 -0700 | [diff] [blame] | 1616 | struct fb_event event; |
Jesse Barnes | cfafca8 | 2007-07-17 04:05:33 -0700 | [diff] [blame] | 1617 | int i, ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | |
| 1619 | i = fb_info->node; |
Jesse Barnes | cfafca8 | 2007-07-17 04:05:33 -0700 | [diff] [blame] | 1620 | if (!registered_fb[i]) { |
| 1621 | ret = -EINVAL; |
| 1622 | goto done; |
| 1623 | } |
| 1624 | |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1625 | |
| 1626 | if (!lock_fb_info(fb_info)) |
| 1627 | return -ENODEV; |
Jesse Barnes | cfafca8 | 2007-07-17 04:05:33 -0700 | [diff] [blame] | 1628 | event.info = fb_info; |
| 1629 | ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event); |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1630 | unlock_fb_info(fb_info); |
Jesse Barnes | cfafca8 | 2007-07-17 04:05:33 -0700 | [diff] [blame] | 1631 | |
| 1632 | if (ret) { |
| 1633 | ret = -EINVAL; |
| 1634 | goto done; |
| 1635 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1636 | |
Antonino A. Daplas | e614b18 | 2006-06-26 00:27:09 -0700 | [diff] [blame] | 1637 | if (fb_info->pixmap.addr && |
| 1638 | (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1639 | kfree(fb_info->pixmap.addr); |
| 1640 | fb_destroy_modelist(&fb_info->modelist); |
| 1641 | registered_fb[i]=NULL; |
| 1642 | num_registered_fb--; |
Greg Kroah-Hartman | 78cde0887 | 2006-09-14 07:30:59 -0700 | [diff] [blame] | 1643 | fb_cleanup_device(fb_info); |
| 1644 | device_destroy(fb_class, MKDEV(FB_MAJOR, i)); |
Antonino A. Daplas | e614b18 | 2006-06-26 00:27:09 -0700 | [diff] [blame] | 1645 | event.info = fb_info; |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 1646 | fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event); |
Dave Airlie | 4410f39 | 2009-06-16 15:34:38 -0700 | [diff] [blame] | 1647 | |
| 1648 | /* this may free fb info */ |
| 1649 | if (fb_info->fbops->fb_destroy) |
| 1650 | fb_info->fbops->fb_destroy(fb_info); |
Jesse Barnes | cfafca8 | 2007-07-17 04:05:33 -0700 | [diff] [blame] | 1651 | done: |
| 1652 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | } |
| 1654 | |
| 1655 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1656 | * fb_set_suspend - low level driver signals suspend |
| 1657 | * @info: framebuffer affected |
| 1658 | * @state: 0 = resuming, !=0 = suspending |
| 1659 | * |
| 1660 | * This is meant to be used by low level drivers to |
| 1661 | * signal suspend/resume to the core & clients. |
| 1662 | * It must be called with the console semaphore held |
| 1663 | */ |
| 1664 | void fb_set_suspend(struct fb_info *info, int state) |
| 1665 | { |
| 1666 | struct fb_event event; |
| 1667 | |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1668 | if (!lock_fb_info(info)) |
| 1669 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | event.info = info; |
| 1671 | if (state) { |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 1672 | fb_notifier_call_chain(FB_EVENT_SUSPEND, &event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | info->state = FBINFO_STATE_SUSPENDED; |
| 1674 | } else { |
| 1675 | info->state = FBINFO_STATE_RUNNING; |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 1676 | fb_notifier_call_chain(FB_EVENT_RESUME, &event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | } |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1678 | unlock_fb_info(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | } |
| 1680 | |
| 1681 | /** |
| 1682 | * fbmem_init - init frame buffer subsystem |
| 1683 | * |
| 1684 | * Initialize the frame buffer subsystem. |
| 1685 | * |
| 1686 | * NOTE: This function is _only_ to be called by drivers/char/mem.c. |
| 1687 | * |
| 1688 | */ |
| 1689 | |
| 1690 | static int __init |
| 1691 | fbmem_init(void) |
| 1692 | { |
Alexey Dobriyan | 0aa1634 | 2008-04-28 02:15:42 -0700 | [diff] [blame] | 1693 | proc_create("fb", 0, NULL, &fb_proc_fops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1694 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | if (register_chrdev(FB_MAJOR,"fb",&fb_fops)) |
| 1696 | printk("unable to get major %d for fb devs\n", FB_MAJOR); |
| 1697 | |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1698 | fb_class = class_create(THIS_MODULE, "graphics"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | if (IS_ERR(fb_class)) { |
| 1700 | printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class)); |
| 1701 | fb_class = NULL; |
| 1702 | } |
| 1703 | return 0; |
| 1704 | } |
| 1705 | |
| 1706 | #ifdef MODULE |
| 1707 | module_init(fbmem_init); |
| 1708 | static void __exit |
| 1709 | fbmem_exit(void) |
| 1710 | { |
Alexey Dobriyan | c43f89c | 2008-04-15 14:34:33 -0700 | [diff] [blame] | 1711 | remove_proc_entry("fb", NULL); |
gregkh@suse.de | 56b2293 | 2005-03-23 10:01:41 -0800 | [diff] [blame] | 1712 | class_destroy(fb_class); |
Jon Smirl | 5a340cc | 2005-07-27 11:46:04 -0700 | [diff] [blame] | 1713 | unregister_chrdev(FB_MAJOR, "fb"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | } |
| 1715 | |
| 1716 | module_exit(fbmem_exit); |
| 1717 | MODULE_LICENSE("GPL"); |
| 1718 | MODULE_DESCRIPTION("Framebuffer base"); |
| 1719 | #else |
| 1720 | subsys_initcall(fbmem_init); |
| 1721 | #endif |
| 1722 | |
| 1723 | int fb_new_modelist(struct fb_info *info) |
| 1724 | { |
| 1725 | struct fb_event event; |
| 1726 | struct fb_var_screeninfo var = info->var; |
| 1727 | struct list_head *pos, *n; |
| 1728 | struct fb_modelist *modelist; |
| 1729 | struct fb_videomode *m, mode; |
| 1730 | int err = 1; |
| 1731 | |
| 1732 | list_for_each_safe(pos, n, &info->modelist) { |
| 1733 | modelist = list_entry(pos, struct fb_modelist, list); |
| 1734 | m = &modelist->mode; |
| 1735 | fb_videomode_to_var(&var, m); |
| 1736 | var.activate = FB_ACTIVATE_TEST; |
| 1737 | err = fb_set_var(info, &var); |
| 1738 | fb_var_to_videomode(&mode, &var); |
| 1739 | if (err || !fb_mode_is_equal(m, &mode)) { |
| 1740 | list_del(pos); |
| 1741 | kfree(pos); |
| 1742 | } |
| 1743 | } |
| 1744 | |
| 1745 | err = 1; |
| 1746 | |
| 1747 | if (!list_empty(&info->modelist)) { |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1748 | if (!lock_fb_info(info)) |
| 1749 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | event.info = info; |
Antonino A. Daplas | 256154f | 2006-07-30 03:04:17 -0700 | [diff] [blame] | 1751 | err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event); |
Andrea Righi | 513adb5 | 2009-04-13 14:39:39 -0700 | [diff] [blame] | 1752 | unlock_fb_info(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | } |
| 1754 | |
| 1755 | return err; |
| 1756 | } |
| 1757 | |
Helge Deller | 0128bee | 2006-12-08 02:40:29 -0800 | [diff] [blame] | 1758 | static char *video_options[FB_MAX] __read_mostly; |
| 1759 | static int ofonly __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1760 | |
| 1761 | /** |
| 1762 | * fb_get_options - get kernel boot parameters |
| 1763 | * @name: framebuffer name as it would appear in |
| 1764 | * the boot parameter line |
| 1765 | * (video=<name>:<options>) |
| 1766 | * @option: the option will be stored here |
| 1767 | * |
| 1768 | * NOTE: Needed to maintain backwards compatibility |
| 1769 | */ |
| 1770 | int fb_get_options(char *name, char **option) |
| 1771 | { |
| 1772 | char *opt, *options = NULL; |
Denys Vlasenko | a67ef27 | 2010-08-10 18:02:30 -0700 | [diff] [blame] | 1773 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | int name_len = strlen(name), i; |
| 1775 | |
| 1776 | if (name_len && ofonly && strncmp(name, "offb", 4)) |
| 1777 | retval = 1; |
| 1778 | |
| 1779 | if (name_len && !retval) { |
| 1780 | for (i = 0; i < FB_MAX; i++) { |
| 1781 | if (video_options[i] == NULL) |
| 1782 | continue; |
Denys Vlasenko | a67ef27 | 2010-08-10 18:02:30 -0700 | [diff] [blame] | 1783 | if (!video_options[i][0]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | continue; |
| 1785 | opt = video_options[i]; |
| 1786 | if (!strncmp(name, opt, name_len) && |
| 1787 | opt[name_len] == ':') |
| 1788 | options = opt + name_len + 1; |
| 1789 | } |
| 1790 | } |
| 1791 | if (options && !strncmp(options, "off", 3)) |
| 1792 | retval = 1; |
| 1793 | |
| 1794 | if (option) |
| 1795 | *option = options; |
| 1796 | |
| 1797 | return retval; |
| 1798 | } |
| 1799 | |
Andrew Morton | bc6d7fd | 2006-02-11 17:56:08 -0800 | [diff] [blame] | 1800 | #ifndef MODULE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1801 | /** |
| 1802 | * video_setup - process command line options |
| 1803 | * @options: string of options |
| 1804 | * |
| 1805 | * Process command line options for frame buffer subsystem. |
| 1806 | * |
| 1807 | * NOTE: This function is a __setup and __init function. |
| 1808 | * It only stores the options. Drivers have to call |
| 1809 | * fb_get_options() as necessary. |
| 1810 | * |
| 1811 | * Returns zero. |
| 1812 | * |
| 1813 | */ |
Adrian Bunk | 75c96f8 | 2005-05-05 16:16:09 -0700 | [diff] [blame] | 1814 | static int __init video_setup(char *options) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | { |
| 1816 | int i, global = 0; |
| 1817 | |
| 1818 | if (!options || !*options) |
| 1819 | global = 1; |
| 1820 | |
| 1821 | if (!global && !strncmp(options, "ofonly", 6)) { |
| 1822 | ofonly = 1; |
| 1823 | global = 1; |
| 1824 | } |
| 1825 | |
Dave Airlie | f803303 | 2009-09-16 20:45:09 +1000 | [diff] [blame] | 1826 | if (!global && !strchr(options, ':')) { |
Geert Uytterhoeven | 9a054fb | 2007-10-16 01:29:51 -0700 | [diff] [blame] | 1827 | fb_mode_option = options; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | global = 1; |
| 1829 | } |
| 1830 | |
| 1831 | if (!global) { |
| 1832 | for (i = 0; i < FB_MAX; i++) { |
| 1833 | if (video_options[i] == NULL) { |
| 1834 | video_options[i] = options; |
| 1835 | break; |
| 1836 | } |
| 1837 | |
| 1838 | } |
| 1839 | } |
| 1840 | |
OGAWA Hirofumi | 9b41046 | 2006-03-31 02:30:33 -0800 | [diff] [blame] | 1841 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | } |
| 1843 | __setup("video=", video_setup); |
Andrew Morton | bc6d7fd | 2006-02-11 17:56:08 -0800 | [diff] [blame] | 1844 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1845 | |
| 1846 | /* |
| 1847 | * Visible symbols for modules |
| 1848 | */ |
| 1849 | |
| 1850 | EXPORT_SYMBOL(register_framebuffer); |
| 1851 | EXPORT_SYMBOL(unregister_framebuffer); |
| 1852 | EXPORT_SYMBOL(num_registered_fb); |
| 1853 | EXPORT_SYMBOL(registered_fb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | EXPORT_SYMBOL(fb_show_logo); |
| 1855 | EXPORT_SYMBOL(fb_set_var); |
| 1856 | EXPORT_SYMBOL(fb_blank); |
| 1857 | EXPORT_SYMBOL(fb_pan_display); |
| 1858 | EXPORT_SYMBOL(fb_get_buffer_offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1859 | EXPORT_SYMBOL(fb_set_suspend); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | EXPORT_SYMBOL(fb_get_options); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | |
| 1862 | MODULE_LICENSE("GPL"); |