2 * linux/drivers/video/fbmem.c
4 * Copyright (C) 1994 Martin Schaller
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
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
14 #include <linux/config.h>
15 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/smp_lock.h>
21 #include <linux/kernel.h>
22 #include <linux/major.h>
23 #include <linux/slab.h>
25 #include <linux/mman.h>
26 #include <linux/tty.h>
27 #include <linux/init.h>
28 #include <linux/linux_logo.h>
29 #include <linux/proc_fs.h>
30 #include <linux/console.h>
32 #include <linux/kmod.h>
34 #include <linux/devfs_fs_kernel.h>
35 #include <linux/err.h>
36 #include <linux/kernel.h>
37 #include <linux/device.h>
39 #if defined(__mc68000__) || defined(CONFIG_APUS)
40 #include <asm/setup.h>
44 #include <asm/uaccess.h>
46 #include <asm/pgtable.h>
50 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
51 #include "console/fbcon.h"
54 * Frame buffer device initialization and setup routines
57 extern int acornfb_init(void);
58 extern int acornfb_setup(char*);
59 extern int amifb_init(void);
60 extern int amifb_setup(char*);
61 extern int atafb_init(void);
62 extern int atafb_setup(char*);
63 extern int macfb_init(void);
64 extern int macfb_setup(char*);
65 extern int cyberfb_init(void);
66 extern int cyberfb_setup(char*);
67 extern int pm2fb_init(void);
68 extern int pm2fb_setup(char*);
69 extern int pm3fb_init(void);
70 extern int pm3fb_setup(char*);
71 extern int clps711xfb_init(void);
72 extern int cyber2000fb_init(void);
73 extern int cyber2000fb_setup(char*);
74 extern int retz3fb_init(void);
75 extern int retz3fb_setup(char*);
76 extern int clgenfb_init(void);
77 extern int clgenfb_setup(char*);
78 extern int hitfb_init(void);
79 extern int vfb_init(void);
80 extern int vfb_setup(char*);
81 extern int offb_init(void);
82 extern int atyfb_init(void);
83 extern int atyfb_setup(char*);
84 extern int aty128fb_init(void);
85 extern int aty128fb_setup(char*);
86 extern int neofb_init(void);
87 extern int neofb_setup(char*);
88 extern int igafb_init(void);
89 extern int igafb_setup(char*);
90 extern int imsttfb_init(void);
91 extern int imsttfb_setup(char*);
92 extern int dnfb_init(void);
93 extern int tgafb_init(void);
94 extern int tgafb_setup(char*);
95 extern int virgefb_init(void);
96 extern int virgefb_setup(char*);
97 extern int resolver_video_setup(char*);
98 extern int s3triofb_init(void);
99 extern int vesafb_init(void);
100 extern int vesafb_setup(char*);
101 extern int vga16fb_init(void);
102 extern int vga16fb_setup(char*);
103 extern int hgafb_init(void);
104 extern int hgafb_setup(char*);
105 extern int matroxfb_init(void);
106 extern int matroxfb_setup(char*);
107 extern int hpfb_init(void);
108 extern int platinumfb_init(void);
109 extern int platinumfb_setup(char*);
110 extern int control_init(void);
111 extern int control_setup(char*);
112 extern int valkyriefb_init(void);
113 extern int valkyriefb_setup(char*);
114 extern int chips_init(void);
115 extern int g364fb_init(void);
116 extern int sa1100fb_init(void);
117 extern int fm2fb_init(void);
118 extern int fm2fb_setup(char*);
119 extern int q40fb_init(void);
120 extern int sun3fb_init(void);
121 extern int sun3fb_setup(char *);
122 extern int sgivwfb_init(void);
123 extern int sgivwfb_setup(char*);
124 extern int rivafb_init(void);
125 extern int rivafb_setup(char*);
126 extern int tdfxfb_init(void);
127 extern int tdfxfb_setup(char*);
128 extern int tridentfb_init(void);
129 extern int tridentfb_setup(char*);
130 extern int sisfb_init(void);
131 extern int sisfb_setup(char*);
132 extern int stifb_init(void);
133 extern int stifb_setup(char*);
134 extern int pmagbafb_init(void);
135 extern int pmagbbfb_init(void);
136 extern int maxinefb_init(void);
137 extern int tx3912fb_init(void);
138 extern int tx3912fb_setup(char*);
139 extern int radeonfb_init(void);
140 extern int radeonfb_setup(char*);
141 extern int radeonfb_old_init(void);
142 extern int radeonfb_old_setup(char*);
143 extern int e1355fb_init(void);
144 extern int e1355fb_setup(char*);
145 extern int pvr2fb_init(void);
146 extern int pvr2fb_setup(char*);
147 extern int sstfb_init(void);
148 extern int sstfb_setup(char*);
149 extern int i810fb_init(void);
150 extern int i810fb_setup(char*);
151 extern int ffb_init(void);
152 extern int ffb_setup(char*);
153 extern int cg6_init(void);
154 extern int cg6_setup(char*);
155 extern int cg3_init(void);
156 extern int cg3_setup(char*);
157 extern int bw2_init(void);
158 extern int bw2_setup(char*);
159 extern int cg14_init(void);
160 extern int cg14_setup(char*);
161 extern int p9100_init(void);
162 extern int p9100_setup(char*);
163 extern int tcx_init(void);
164 extern int tcx_setup(char*);
165 extern int leo_init(void);
166 extern int leo_setup(char*);
167 extern int kyrofb_init(void);
168 extern int kyrofb_setup(char*);
174 } fb_drivers[] __initdata = {
177 * Chipset specific drivers that use resource management
179 #ifdef CONFIG_FB_RETINAZ3
180 { "retz3fb", retz3fb_init, retz3fb_setup },
182 #ifdef CONFIG_FB_AMIGA
183 { "amifb", amifb_init, amifb_setup },
185 #ifdef CONFIG_FB_CLPS711X
186 { "clps711xfb", clps711xfb_init, NULL },
188 #ifdef CONFIG_FB_CYBER
189 { "cyberfb", cyberfb_init, cyberfb_setup },
191 #ifdef CONFIG_FB_CYBER2000
192 { "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
195 { "pm2fb", pm2fb_init, pm2fb_setup },
198 { "pm3fb", pm3fb_init, pm3fb_setup },
200 #ifdef CONFIG_FB_CLGEN
201 { "clgenfb", clgenfb_init, clgenfb_setup },
204 { "atyfb", atyfb_init, atyfb_setup },
206 #ifdef CONFIG_FB_MATROX
207 { "matroxfb", matroxfb_init, matroxfb_setup },
209 #ifdef CONFIG_FB_ATY128
210 { "aty128fb", aty128fb_init, aty128fb_setup },
212 #ifdef CONFIG_FB_NEOMAGIC
213 { "neofb", neofb_init, neofb_setup },
215 #ifdef CONFIG_FB_VIRGE
216 { "virgefb", virgefb_init, virgefb_setup },
218 #ifdef CONFIG_FB_RIVA
219 { "rivafb", rivafb_init, rivafb_setup },
221 #ifdef CONFIG_FB_3DFX
222 { "tdfxfb", tdfxfb_init, tdfxfb_setup },
224 #ifdef CONFIG_FB_RADEON
225 { "radeonfb", radeonfb_init, radeonfb_setup },
227 #ifdef CONFIG_FB_RADEON_OLD
228 { "radeonfb_old", radeonfb_old_init, radeonfb_old_setup },
230 #ifdef CONFIG_FB_CONTROL
231 { "controlfb", control_init, control_setup },
233 #ifdef CONFIG_FB_PLATINUM
234 { "platinumfb", platinumfb_init, platinumfb_setup },
236 #ifdef CONFIG_FB_VALKYRIE
237 { "valkyriefb", valkyriefb_init, valkyriefb_setup },
239 #ifdef CONFIG_FB_CT65550
240 { "chipsfb", chips_init, NULL },
242 #ifdef CONFIG_FB_IMSTT
243 { "imsttfb", imsttfb_init, imsttfb_setup },
245 #ifdef CONFIG_FB_S3TRIO
246 { "s3triofb", s3triofb_init, NULL },
249 { "fm2fb", fm2fb_init, fm2fb_setup },
252 { "sisfb", sisfb_init, sisfb_setup },
254 #ifdef CONFIG_FB_TRIDENT
255 { "tridentfb", tridentfb_init, tridentfb_setup },
257 #ifdef CONFIG_FB_I810
258 { "i810fb", i810fb_init, i810fb_setup },
261 { "stifb", stifb_init, stifb_setup },
264 { "ffb", ffb_init, ffb_setup },
267 { "cg6fb", cg6_init, cg6_setup },
270 { "cg3fb", cg3_init, cg3_setup },
273 { "bw2fb", bw2_init, bw2_setup },
275 #ifdef CONFIG_FB_CG14
276 { "cg14fb", cg14_init, cg14_setup },
278 #ifdef CONFIG_FB_P9100
279 { "p9100fb", p9100_init, p9100_setup },
282 { "tcxfb", tcx_init, tcx_setup },
285 { "leofb", leo_init, leo_setup },
289 * Generic drivers that are used as fallbacks
291 * These depend on resource management and must be initialized
292 * _after_ all other frame buffer devices that use resource
297 { "offb", offb_init, NULL },
299 #ifdef CONFIG_FB_VESA
300 { "vesafb", vesafb_init, vesafb_setup },
304 * Chipset specific drivers that don't use resource management (yet)
307 #ifdef CONFIG_FB_SGIVW
308 { "sgivwfb", sgivwfb_init, sgivwfb_setup },
310 #ifdef CONFIG_FB_ACORN
311 { "acornfb", acornfb_init, acornfb_setup },
313 #ifdef CONFIG_FB_ATARI
314 { "atafb", atafb_init, atafb_setup },
317 { "macfb", macfb_init, macfb_setup },
320 { "hgafb", hgafb_init, hgafb_setup },
323 { "igafb", igafb_init, igafb_setup },
326 { "apollofb", dnfb_init, NULL },
329 { "q40fb", q40fb_init, NULL },
332 { "tgafb", tgafb_init, tgafb_setup },
334 #ifdef CONFIG_FB_HP300
335 { "hpfb", hpfb_init, NULL },
337 #ifdef CONFIG_FB_G364
338 { "g364fb", g364fb_init, NULL },
340 #ifdef CONFIG_FB_SA1100
341 { "sa1100fb", sa1100fb_init, NULL },
343 #ifdef CONFIG_FB_SUN3
344 { "sun3fb", sun3fb_init, sun3fb_setup },
347 { "hitfb", hitfb_init, NULL },
349 #ifdef CONFIG_FB_TX3912
350 { "tx3912fb", tx3912fb_init, tx3912fb_setup },
352 #ifdef CONFIG_FB_E1355
353 { "e1355fb", e1355fb_init, e1355fb_setup },
355 #ifdef CONFIG_FB_PVR2
356 { "pvr2fb", pvr2fb_init, pvr2fb_setup },
358 #ifdef CONFIG_FB_PMAG_BA
359 { "pmagbafb", pmagbafb_init, NULL },
361 #ifdef CONFIG_FB_PMAGB_B
362 { "pmagbbfb", pmagbbfb_init, NULL },
364 #ifdef CONFIG_FB_MAXINE
365 { "maxinefb", maxinefb_init, NULL },
367 #ifdef CONFIG_FB_VOODOO1
368 { "sstfb", sstfb_init, sstfb_setup },
370 #ifdef CONFIG_FB_KYRO
371 { "kyrofb", kyrofb_init, kyrofb_setup },
375 * Generic drivers that don't use resource management (yet)
378 #ifdef CONFIG_FB_VGA16
379 { "vga16fb", vga16fb_init, vga16fb_setup },
382 #ifdef CONFIG_GSP_RESOLVER
383 /* Not a real frame buffer device... */
384 { "resolverfb", NULL, resolver_video_setup },
387 #ifdef CONFIG_FB_VIRTUAL
389 * Vfb must be last to avoid that it becomes your primary display if
390 * other display devices are present
392 { "vfb", vfb_init, vfb_setup },
396 #define NUM_FB_DRIVERS (sizeof(fb_drivers)/sizeof(*fb_drivers))
397 #define FBPIXMAPSIZE 16384
399 extern const char *global_mode_option;
401 static initcall_t pref_init_funcs[FB_MAX];
402 static int num_pref_init_funcs __initdata = 0;
403 static struct notifier_block *fb_notifier_list;
404 struct fb_info *registered_fb[FB_MAX];
405 int num_registered_fb;
408 static int ofonly __initdata = 0;
414 u8 sys_inbuf(struct fb_info *info, u8 *src)
419 void sys_outbuf(struct fb_info *info, u8 *dst, u8 *src, unsigned int size)
421 memcpy(dst, src, size);
424 void fb_move_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
425 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
430 for (i = height; i--; ) {
431 buf->outbuf(info, dst, src, s_pitch);
437 void fb_move_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
438 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
439 u32 height, u32 shift_high, u32 shift_low,
442 u8 mask = (u8) (0xfff << shift_high), tmp;
445 for (i = height; i--; ) {
446 for (j = 0; j < idx; j++) {
447 tmp = buf->inbuf(info, dst+j);
449 tmp |= *src >> shift_low;
450 buf->outbuf(info, dst+j, &tmp, 1);
451 tmp = *src << shift_high;
452 buf->outbuf(info, dst+j+1, &tmp, 1);
455 tmp = buf->inbuf(info, dst+idx);
457 tmp |= *src >> shift_low;
458 buf->outbuf(info, dst+idx, &tmp, 1);
459 if (shift_high < mod) {
460 tmp = *src << shift_high;
461 buf->outbuf(info, dst+idx+1, &tmp, 1);
469 * we need to lock this section since fb_cursor
470 * may use fb_imageblit()
472 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
474 u32 align = buf->buf_align - 1, offset;
475 char *addr = buf->addr;
477 /* If IO mapped, we need to sync before access, no sharing of
480 if (buf->flags & FB_PIXMAP_IO) {
481 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
482 info->fbops->fb_sync(info);
486 /* See if we fit in the remaining pixmap space */
487 offset = buf->offset + align;
489 if (offset + size > buf->size) {
490 /* We do not fit. In order to be able to re-use the buffer,
491 * we must ensure no asynchronous DMA'ing or whatever operation
492 * is in progress, we sync for that.
494 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
495 info->fbops->fb_sync(info);
498 buf->offset = offset + size;
505 #include <linux/linux_logo.h>
507 static inline unsigned safe_shift(unsigned d, int n)
509 return n < 0 ? d >> -n : d << n;
512 static void __init fb_set_logocmap(struct fb_info *info,
513 const struct linux_logo *logo)
515 struct fb_cmap palette_cmap;
516 u16 palette_green[16];
517 u16 palette_blue[16];
520 const unsigned char *clut = logo->clut;
522 palette_cmap.start = 0;
523 palette_cmap.len = 16;
524 palette_cmap.red = palette_red;
525 palette_cmap.green = palette_green;
526 palette_cmap.blue = palette_blue;
527 palette_cmap.transp = NULL;
529 for (i = 0; i < logo->clutsize; i += n) {
530 n = logo->clutsize - i;
531 /* palette_cmap provides space for only 16 colors at once */
534 palette_cmap.start = 32 + i;
535 palette_cmap.len = n;
536 for (j = 0; j < n; ++j) {
537 palette_cmap.red[j] = clut[0] << 8 | clut[0];
538 palette_cmap.green[j] = clut[1] << 8 | clut[1];
539 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
542 fb_set_cmap(&palette_cmap, 1, info);
546 static void __init fb_set_logo_truepalette(struct fb_info *info,
547 const struct linux_logo *logo,
550 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
551 unsigned char redmask, greenmask, bluemask;
552 int redshift, greenshift, blueshift;
554 const unsigned char *clut = logo->clut;
557 * We have to create a temporary palette since console palette is only
560 /* Bug: Doesn't obey msb_right ... (who needs that?) */
561 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
562 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
563 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
564 redshift = info->var.red.offset - (8 - info->var.red.length);
565 greenshift = info->var.green.offset - (8 - info->var.green.length);
566 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
568 for ( i = 0; i < logo->clutsize; i++) {
569 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
570 safe_shift((clut[1] & greenmask), greenshift) |
571 safe_shift((clut[2] & bluemask), blueshift));
576 static void __init fb_set_logo_directpalette(struct fb_info *info,
577 const struct linux_logo *logo,
580 int redshift, greenshift, blueshift;
583 redshift = info->var.red.offset;
584 greenshift = info->var.green.offset;
585 blueshift = info->var.blue.offset;
587 for (i = 32; i < logo->clutsize; i++)
588 palette[i] = i << redshift | i << greenshift | i << blueshift;
591 static void __init fb_set_logo(struct fb_info *info,
592 const struct linux_logo *logo, u8 *dst,
596 const u8 *src = logo->data;
601 for (i = 0; i < logo->height; i++)
602 for (j = 0; j < logo->width; src++) {
605 if (j < logo->width) {
606 *dst++ = *src & 0x0f;
614 for (i = 0; i < logo->height; i++) {
617 for (j = 0; j < logo->width; j++) {
618 *dst++ = (d >> shift) & 1;
619 shift = (shift-1) & 7;
629 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
630 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
631 * the visual format and color depth of the framebuffer, the DAC, the
632 * pseudo_palette, and the logo data will be adjusted accordingly.
634 * Case 1 - linux_logo_clut224:
635 * Color exceeds the number of console colors (16), thus we set the hardware DAC
636 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
638 * For visuals that require color info from the pseudo_palette, we also construct
639 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
642 * Case 2 - linux_logo_vga16:
643 * The number of colors just matches the console colors, thus there is no need
644 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
645 * each byte contains color information for two pixels (upper and lower nibble).
646 * To be consistent with fb_imageblit() usage, we therefore separate the two
647 * nibbles into separate bytes. The "depth" flag will be set to 4.
649 * Case 3 - linux_logo_mono:
650 * This is similar with Case 2. Each byte contains information for 8 pixels.
651 * We isolate each bit and expand each into a byte. The "depth" flag will
654 static struct logo_data {
656 int needs_directpalette;
657 int needs_truepalette;
659 const struct linux_logo *logo;
662 int fb_prepare_logo(struct fb_info *info)
664 memset(&fb_logo, 0, sizeof(struct logo_data));
666 switch (info->fix.visual) {
667 case FB_VISUAL_TRUECOLOR:
668 if (info->var.bits_per_pixel >= 8)
669 fb_logo.needs_truepalette = 1;
671 case FB_VISUAL_DIRECTCOLOR:
672 if (info->var.bits_per_pixel >= 24) {
673 fb_logo.needs_directpalette = 1;
674 fb_logo.needs_cmapreset = 1;
677 case FB_VISUAL_PSEUDOCOLOR:
678 fb_logo.needs_cmapreset = 1;
682 /* Return if no suitable logo was found */
683 fb_logo.logo = fb_find_logo(info->var.bits_per_pixel);
685 if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
689 /* What depth we asked for might be different from what we get */
690 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
692 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
696 return fb_logo.logo->height;
699 int fb_show_logo(struct fb_info *info)
701 u32 *palette = NULL, *saved_pseudo_palette = NULL;
702 unsigned char *logo_new = NULL;
703 struct fb_image image;
706 /* Return if the frame buffer is not mapped or suspended */
707 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
710 image.depth = fb_logo.depth;
711 image.data = fb_logo.logo->data;
713 if (fb_logo.needs_cmapreset)
714 fb_set_logocmap(info, fb_logo.logo);
716 if (fb_logo.needs_truepalette ||
717 fb_logo.needs_directpalette) {
718 palette = kmalloc(256 * 4, GFP_KERNEL);
722 if (fb_logo.needs_truepalette)
723 fb_set_logo_truepalette(info, fb_logo.logo, palette);
725 fb_set_logo_directpalette(info, fb_logo.logo, palette);
727 saved_pseudo_palette = info->pseudo_palette;
728 info->pseudo_palette = palette;
731 if (fb_logo.depth == 4) {
732 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
734 if (logo_new == NULL) {
737 if (saved_pseudo_palette)
738 info->pseudo_palette = saved_pseudo_palette;
741 image.data = logo_new;
742 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
745 image.width = fb_logo.logo->width;
746 image.height = fb_logo.logo->height;
749 for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
750 x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
752 info->fbops->fb_imageblit(info, &image);
757 if (saved_pseudo_palette != NULL)
758 info->pseudo_palette = saved_pseudo_palette;
759 if (logo_new != NULL)
761 return fb_logo.logo->height;
764 int fb_prepare_logo(struct fb_info *info) { return 0; }
765 int fb_show_logo(struct fb_info *info) { return 0; }
766 #endif /* CONFIG_LOGO */
768 static int fbmem_read_proc(char *buf, char **start, off_t offset,
769 int len, int *eof, void *private)
775 for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++)
777 clen += sprintf(buf + clen, "%d %s\n",
780 *start = buf + offset;
785 return clen < len ? clen : len;
789 fb_read(struct file *file, char *buf, size_t count, loff_t *ppos)
791 unsigned long p = *ppos;
792 struct inode *inode = file->f_dentry->d_inode;
793 int fbidx = iminor(inode);
794 struct fb_info *info = registered_fb[fbidx];
796 if (!info || ! info->screen_base)
799 if (info->state != FBINFO_STATE_RUNNING)
802 if (info->fbops->fb_read)
803 return info->fbops->fb_read(file, buf, count, ppos);
805 if (p >= info->fix.smem_len)
807 if (count >= info->fix.smem_len)
808 count = info->fix.smem_len;
809 if (count + p > info->fix.smem_len)
810 count = info->fix.smem_len - p;
811 if (info->fbops->fb_sync)
812 info->fbops->fb_sync(info);
816 base_addr = info->screen_base;
817 count -= copy_to_user(buf, base_addr+p, count);
826 fb_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
828 unsigned long p = *ppos;
829 struct inode *inode = file->f_dentry->d_inode;
830 int fbidx = iminor(inode);
831 struct fb_info *info = registered_fb[fbidx];
834 if (!info || !info->screen_base)
837 if (info->state != FBINFO_STATE_RUNNING)
840 if (info->fbops->fb_write)
841 return info->fbops->fb_write(file, buf, count, ppos);
843 if (p > info->fix.smem_len)
845 if (count >= info->fix.smem_len)
846 count = info->fix.smem_len;
848 if (count + p > info->fix.smem_len) {
849 count = info->fix.smem_len - p;
852 if (info->fbops->fb_sync)
853 info->fbops->fb_sync(info);
857 base_addr = info->screen_base;
858 count -= copy_from_user(base_addr+p, buf, count);
868 static void try_to_load(int fb)
870 request_module("fb%d", fb);
872 #endif /* CONFIG_KMOD */
875 fb_load_cursor_image(struct fb_info *info)
877 unsigned int width = (info->cursor.image.width + 7) >> 3;
878 u8 *data = (u8 *) info->cursor.image.data;
880 info->sprite.outbuf(info, info->sprite.addr, data, width);
884 fb_cursor(struct fb_info *info, struct fb_cursor *sprite)
886 struct fb_cursor cursor;
889 if (copy_from_user(&cursor, sprite, sizeof(struct fb_cursor)))
892 if (cursor.set & FB_CUR_SETCUR)
893 info->cursor.enable = 1;
895 if (cursor.set & FB_CUR_SETCMAP) {
896 err = fb_copy_cmap(&cursor.image.cmap, &sprite->image.cmap, 1);
901 if (cursor.set & FB_CUR_SETSHAPE) {
902 int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;
903 if ((cursor.image.height != info->cursor.image.height) ||
904 (cursor.image.width != info->cursor.image.width))
905 cursor.set |= FB_CUR_SETSIZE;
907 cursor.image.data = kmalloc(size, GFP_KERNEL);
908 if (!cursor.image.data)
911 cursor.mask = kmalloc(size, GFP_KERNEL);
913 kfree(cursor.image.data);
917 if (copy_from_user(cursor.image.data, sprite->image.data, size) ||
918 copy_from_user(cursor.mask, sprite->mask, size)) {
919 kfree(cursor.image.data);
924 info->cursor.set = cursor.set;
925 info->cursor.rop = cursor.rop;
926 err = info->fbops->fb_cursor(info, &cursor);
931 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
933 int xoffset = var->xoffset;
934 int yoffset = var->yoffset;
937 if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
938 xoffset + info->var.xres > info->var.xres_virtual ||
939 yoffset + info->var.yres > info->var.yres_virtual)
941 if ((err = info->fbops->fb_pan_display(var, info)))
943 info->var.xoffset = var->xoffset;
944 info->var.yoffset = var->yoffset;
945 if (var->vmode & FB_VMODE_YWRAP)
946 info->var.vmode |= FB_VMODE_YWRAP;
948 info->var.vmode &= ~FB_VMODE_YWRAP;
953 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
957 if ((var->activate & FB_ACTIVATE_FORCE) ||
958 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
959 if (!info->fbops->fb_check_var) {
964 if ((err = info->fbops->fb_check_var(var, info)))
967 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
970 if (info->fbops->fb_set_par)
971 info->fbops->fb_set_par(info);
973 fb_pan_display(info, &info->var);
975 fb_set_cmap(&info->cmap, 1, info);
977 notifier_call_chain(&fb_notifier_list, FB_EVENT_MODE_CHANGE, info);
984 fb_blank(struct fb_info *info, int blank)
986 /* ??? Variable sized stack allocation. */
987 u16 black[info->cmap.len];
990 if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
993 memset(black, 0, info->cmap.len * sizeof(u16));
994 cmap.red = cmap.green = cmap.blue = black;
995 cmap.transp = info->cmap.transp ? black : NULL;
996 cmap.start = info->cmap.start;
997 cmap.len = info->cmap.len;
1000 return fb_set_cmap(&cmap, 1, info);
1004 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1007 int fbidx = iminor(inode);
1008 struct fb_info *info = registered_fb[fbidx];
1009 struct fb_ops *fb = info->fbops;
1010 struct fb_var_screeninfo var;
1011 struct fb_fix_screeninfo fix;
1012 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1013 struct fb_con2fbmap con2fb;
1015 struct fb_cmap cmap;
1021 case FBIOGET_VSCREENINFO:
1022 return copy_to_user((void *) arg, &info->var,
1023 sizeof(var)) ? -EFAULT : 0;
1024 case FBIOPUT_VSCREENINFO:
1025 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1027 acquire_console_sem();
1028 i = fb_set_var(info, &var);
1029 release_console_sem();
1031 if (copy_to_user((void *) arg, &var, sizeof(var)))
1034 case FBIOGET_FSCREENINFO:
1035 return copy_to_user((void *) arg, &info->fix,
1036 sizeof(fix)) ? -EFAULT : 0;
1038 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1040 return (fb_set_cmap(&cmap, 0, info));
1042 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1044 return (fb_copy_cmap(&info->cmap, &cmap, 2));
1045 case FBIOPAN_DISPLAY:
1046 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1048 acquire_console_sem();
1049 i = fb_pan_display(info, &var);
1050 release_console_sem();
1053 if (copy_to_user((void *) arg, &var, sizeof(var)))
1057 acquire_console_sem();
1058 rc = fb_cursor(info, (struct fb_cursor *) arg);
1059 release_console_sem();
1061 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1062 case FBIOGET_CON2FBMAP:
1063 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1065 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1067 con2fb.framebuffer = con2fb_map[con2fb.console-1];
1068 return copy_to_user((void *)arg, &con2fb,
1069 sizeof(con2fb)) ? -EFAULT : 0;
1070 case FBIOPUT_CON2FBMAP:
1071 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1073 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
1075 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1078 if (!registered_fb[con2fb.framebuffer])
1079 try_to_load(con2fb.framebuffer);
1080 #endif /* CONFIG_KMOD */
1081 if (!registered_fb[con2fb.framebuffer])
1083 if (con2fb.console != 0)
1084 set_con2fb_map(con2fb.console-1, con2fb.framebuffer);
1088 #endif /* CONFIG_FRAMEBUFFER_CONSOLE */
1090 acquire_console_sem();
1091 i = fb_blank(info, arg);
1092 release_console_sem();
1095 if (fb->fb_ioctl == NULL)
1097 return fb->fb_ioctl(inode, file, cmd, arg, info);
1102 fb_mmap(struct file *file, struct vm_area_struct * vma)
1104 int fbidx = iminor(file->f_dentry->d_inode);
1105 struct fb_info *info = registered_fb[fbidx];
1106 struct fb_ops *fb = info->fbops;
1108 #if !defined(__sparc__) || defined(__sparc_v9__)
1109 unsigned long start;
1113 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1115 off = vma->vm_pgoff << PAGE_SHIFT;
1121 res = fb->fb_mmap(info, file, vma);
1126 #if defined(__sparc__) && !defined(__sparc_v9__)
1127 /* Should never get here, all fb drivers should have their own
1134 /* frame buffer memory */
1135 start = info->fix.smem_start;
1136 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1138 /* memory mapped io */
1140 if (info->var.accel_flags) {
1144 start = info->fix.mmio_start;
1145 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1149 if ((vma->vm_end - vma->vm_start + off) > len)
1152 vma->vm_pgoff = off >> PAGE_SHIFT;
1153 /* This is an IO map - tell maydump to skip this VMA */
1154 vma->vm_flags |= VM_IO;
1155 #if defined(__sparc_v9__)
1156 vma->vm_flags |= (VM_SHM | VM_LOCKED);
1157 if (io_remap_page_range(vma, vma->vm_start, off,
1158 vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
1161 #if defined(__mc68000__)
1162 #if defined(CONFIG_SUN3)
1163 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1164 #elif defined(CONFIG_MMU)
1165 if (CPU_IS_020_OR_030)
1166 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1167 if (CPU_IS_040_OR_060) {
1168 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1169 /* Use no-cache mode, serialized */
1170 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1173 #elif defined(__powerpc__)
1174 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
1175 #elif defined(__alpha__)
1176 /* Caching is off in the I/O space quadrant by design. */
1177 #elif defined(__i386__) || defined(__x86_64__)
1178 if (boot_cpu_data.x86 > 3)
1179 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1180 #elif defined(__mips__)
1181 pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK;
1182 pgprot_val(vma->vm_page_prot) |= _CACHE_UNCACHED;
1183 #elif defined(__hppa__)
1184 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1185 #elif defined(__ia64__) || defined(__arm__) || defined(__sh__)
1186 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1188 #warning What do we have to do here??
1190 if (io_remap_page_range(vma, vma->vm_start, off,
1191 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1193 #endif /* !__sparc_v9__ */
1195 #endif /* !sparc32 */
1199 fb_open(struct inode *inode, struct file *file)
1201 int fbidx = iminor(inode);
1202 struct fb_info *info;
1205 if (fbidx >= FB_MAX)
1208 if (!(info = registered_fb[fbidx]))
1210 #endif /* CONFIG_KMOD */
1211 if (!(info = registered_fb[fbidx]))
1213 if (!try_module_get(info->fbops->owner))
1215 if (info->fbops->fb_open) {
1216 res = info->fbops->fb_open(info,1);
1218 module_put(info->fbops->owner);
1224 fb_release(struct inode *inode, struct file *file)
1226 int fbidx = iminor(inode);
1227 struct fb_info *info;
1230 info = registered_fb[fbidx];
1231 if (info->fbops->fb_release)
1232 info->fbops->fb_release(info,1);
1233 module_put(info->fbops->owner);
1238 static struct file_operations fb_fops = {
1239 .owner = THIS_MODULE,
1245 .release = fb_release,
1246 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1247 .get_unmapped_area = get_fb_unmapped_area,
1251 static struct class_simple *fb_class;
1254 * register_framebuffer - registers a frame buffer device
1255 * @fb_info: frame buffer info structure
1257 * Registers a frame buffer device @fb_info.
1259 * Returns negative errno on error, or zero for success.
1264 register_framebuffer(struct fb_info *fb_info)
1267 struct class_device *c;
1269 if (num_registered_fb == FB_MAX)
1271 num_registered_fb++;
1272 for (i = 0 ; i < FB_MAX; i++)
1273 if (!registered_fb[i])
1277 c = class_simple_device_add(fb_class, MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1280 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(c));
1283 if (fb_info->pixmap.addr == NULL) {
1284 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1285 if (fb_info->pixmap.addr) {
1286 fb_info->pixmap.size = FBPIXMAPSIZE;
1287 fb_info->pixmap.buf_align = 1;
1288 fb_info->pixmap.scan_align = 1;
1289 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1292 fb_info->pixmap.offset = 0;
1293 if (fb_info->pixmap.outbuf == NULL)
1294 fb_info->pixmap.outbuf = sys_outbuf;
1295 if (fb_info->pixmap.inbuf == NULL)
1296 fb_info->pixmap.inbuf = sys_inbuf;
1298 if (fb_info->sprite.addr == NULL) {
1299 fb_info->sprite.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1300 if (fb_info->sprite.addr) {
1301 fb_info->sprite.size = FBPIXMAPSIZE;
1302 fb_info->sprite.buf_align = 1;
1303 fb_info->sprite.scan_align = 1;
1304 fb_info->sprite.flags = FB_PIXMAP_DEFAULT;
1307 fb_info->sprite.offset = 0;
1308 if (fb_info->sprite.outbuf == NULL)
1309 fb_info->sprite.outbuf = sys_outbuf;
1310 if (fb_info->sprite.inbuf == NULL)
1311 fb_info->sprite.inbuf = sys_inbuf;
1313 registered_fb[i] = fb_info;
1315 devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1316 S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1322 * unregister_framebuffer - releases a frame buffer device
1323 * @fb_info: frame buffer info structure
1325 * Unregisters a frame buffer device @fb_info.
1327 * Returns negative errno on error, or zero for success.
1332 unregister_framebuffer(struct fb_info *fb_info)
1337 if (!registered_fb[i])
1339 devfs_remove("fb/%d", i);
1341 if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1342 kfree(fb_info->pixmap.addr);
1343 if (fb_info->sprite.addr && (fb_info->sprite.flags & FB_PIXMAP_DEFAULT))
1344 kfree(fb_info->sprite.addr);
1345 registered_fb[i]=NULL;
1346 num_registered_fb--;
1347 class_simple_device_remove(MKDEV(FB_MAJOR, i));
1352 * fb_register_client - register a client notifier
1353 * @nb: notifier block to callback on events
1355 int fb_register_client(struct notifier_block *nb)
1357 return notifier_chain_register(&fb_notifier_list, nb);
1361 * fb_unregister_client - unregister a client notifier
1362 * @nb: notifier block to callback on events
1364 int fb_unregister_client(struct notifier_block *nb)
1366 return notifier_chain_unregister(&fb_notifier_list, nb);
1370 * fb_set_suspend - low level driver signals suspend
1371 * @info: framebuffer affected
1372 * @state: 0 = resuming, !=0 = suspending
1374 * This is meant to be used by low level drivers to
1375 * signal suspend/resume to the core & clients.
1376 * It must be called with the console semaphore held
1378 void fb_set_suspend(struct fb_info *info, int state)
1381 notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, info);
1382 info->state = FBINFO_STATE_SUSPENDED;
1384 info->state = FBINFO_STATE_RUNNING;
1385 notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, info);
1390 * fbmem_init - init frame buffer subsystem
1392 * Initialize the frame buffer subsystem.
1394 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1403 create_proc_read_entry("fb", 0, 0, fbmem_read_proc, NULL);
1406 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1407 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1409 fb_class = class_simple_create(THIS_MODULE, "graphics");
1410 if (IS_ERR(fb_class)) {
1411 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1423 * Probe for all builtin frame buffer devices
1425 for (i = 0; i < num_pref_init_funcs; i++)
1426 pref_init_funcs[i]();
1428 for (i = 0; i < NUM_FB_DRIVERS; i++)
1429 if (fb_drivers[i].init)
1430 fb_drivers[i].init();
1435 * video_setup - process command line options
1436 * @options: string of options
1438 * Process command line options for frame buffer subsystem.
1440 * NOTE: This function is a __setup and __init function.
1446 int __init video_setup(char *options)
1450 if (!options || !*options)
1454 if (!strcmp(options, "ofonly")) {
1460 if (num_pref_init_funcs == FB_MAX)
1463 for (i = 0; i < NUM_FB_DRIVERS; i++) {
1464 j = strlen(fb_drivers[i].name);
1465 if (!strncmp(options, fb_drivers[i].name, j) &&
1466 options[j] == ':') {
1467 if (!strcmp(options+j+1, "off"))
1468 fb_drivers[i].init = NULL;
1470 if (fb_drivers[i].init) {
1471 pref_init_funcs[num_pref_init_funcs++] =
1473 fb_drivers[i].init = NULL;
1475 if (fb_drivers[i].setup)
1476 fb_drivers[i].setup(options+j+1);
1483 * If we get here no fb was specified.
1484 * We consider the argument to be a global video mode option.
1486 global_mode_option = options;
1490 __setup("video=", video_setup);
1493 * Visible symbols for modules
1496 EXPORT_SYMBOL(register_framebuffer);
1497 EXPORT_SYMBOL(unregister_framebuffer);
1498 EXPORT_SYMBOL(num_registered_fb);
1499 EXPORT_SYMBOL(registered_fb);
1500 EXPORT_SYMBOL(fb_prepare_logo);
1501 EXPORT_SYMBOL(fb_show_logo);
1502 EXPORT_SYMBOL(fb_set_var);
1503 EXPORT_SYMBOL(fb_blank);
1504 EXPORT_SYMBOL(fb_pan_display);
1505 EXPORT_SYMBOL(fb_get_buffer_offset);
1506 EXPORT_SYMBOL(fb_move_buf_unaligned);
1507 EXPORT_SYMBOL(fb_move_buf_aligned);
1508 EXPORT_SYMBOL(fb_load_cursor_image);
1509 EXPORT_SYMBOL(fb_set_suspend);
1510 EXPORT_SYMBOL(fb_register_client);
1511 EXPORT_SYMBOL(fb_unregister_client);
1513 MODULE_LICENSE("GPL");