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 cirrusfb_init(void);
77 extern int cirrusfb_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 pxafb_init(void);
118 extern int pxafb_setup(char*);
119 extern int fm2fb_init(void);
120 extern int fm2fb_setup(char*);
121 extern int q40fb_init(void);
122 extern int sun3fb_init(void);
123 extern int sun3fb_setup(char *);
124 extern int sgivwfb_init(void);
125 extern int sgivwfb_setup(char*);
126 extern int gbefb_init(void);
127 extern int gbefb_setup(char*);
128 extern int rivafb_init(void);
129 extern int rivafb_setup(char*);
130 extern int tdfxfb_init(void);
131 extern int tdfxfb_setup(char*);
132 extern int tridentfb_init(void);
133 extern int tridentfb_setup(char*);
134 extern int sisfb_init(void);
135 extern int sisfb_setup(char*);
136 extern int stifb_init(void);
137 extern int stifb_setup(char*);
138 extern int pmagbafb_init(void);
139 extern int pmagbbfb_init(void);
140 extern int maxinefb_init(void);
141 extern int tx3912fb_init(void);
142 extern int tx3912fb_setup(char*);
143 extern int radeonfb_init(void);
144 extern int radeonfb_setup(char*);
145 extern int radeonfb_old_init(void);
146 extern int radeonfb_old_setup(char*);
147 extern int e1355fb_init(void);
148 extern int e1355fb_setup(char*);
149 extern int pvr2fb_init(void);
150 extern int pvr2fb_setup(char*);
151 extern int sstfb_init(void);
152 extern int sstfb_setup(char*);
153 extern int i810fb_init(void);
154 extern int i810fb_setup(char*);
155 extern int ffb_init(void);
156 extern int ffb_setup(char*);
157 extern int cg6_init(void);
158 extern int cg6_setup(char*);
159 extern int cg3_init(void);
160 extern int cg3_setup(char*);
161 extern int bw2_init(void);
162 extern int bw2_setup(char*);
163 extern int cg14_init(void);
164 extern int cg14_setup(char*);
165 extern int p9100_init(void);
166 extern int p9100_setup(char*);
167 extern int tcx_init(void);
168 extern int tcx_setup(char*);
169 extern int leo_init(void);
170 extern int leo_setup(char*);
171 extern int kyrofb_init(void);
172 extern int kyrofb_setup(char*);
173 extern int mc68x328fb_init(void);
174 extern int mc68x328fb_setup(char *);
175 extern int asiliantfb_init(void);
181 } fb_drivers[] __initdata = {
184 * Chipset specific drivers that use resource management
186 #ifdef CONFIG_FB_RETINAZ3
187 { "retz3fb", retz3fb_init, retz3fb_setup },
189 #ifdef CONFIG_FB_AMIGA
190 { "amifb", amifb_init, amifb_setup },
192 #ifdef CONFIG_FB_CLPS711X
193 { "clps711xfb", clps711xfb_init, NULL },
195 #ifdef CONFIG_FB_CYBER
196 { "cyberfb", cyberfb_init, cyberfb_setup },
198 #ifdef CONFIG_FB_CYBER2000
199 { "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
202 { "pm2fb", pm2fb_init, pm2fb_setup },
205 { "pm3fb", pm3fb_init, pm3fb_setup },
207 #ifdef CONFIG_FB_CIRRUS
208 { "cirrusfb", cirrusfb_init, cirrusfb_setup },
211 { "atyfb", atyfb_init, atyfb_setup },
213 #ifdef CONFIG_FB_MATROX
214 { "matroxfb", matroxfb_init, matroxfb_setup },
216 #ifdef CONFIG_FB_ATY128
217 { "aty128fb", aty128fb_init, aty128fb_setup },
219 #ifdef CONFIG_FB_NEOMAGIC
220 { "neofb", neofb_init, neofb_setup },
222 #ifdef CONFIG_FB_VIRGE
223 { "virgefb", virgefb_init, virgefb_setup },
225 #ifdef CONFIG_FB_RIVA
226 { "rivafb", rivafb_init, rivafb_setup },
228 #ifdef CONFIG_FB_3DFX
229 { "tdfxfb", tdfxfb_init, tdfxfb_setup },
231 #ifdef CONFIG_FB_RADEON
232 { "radeonfb", radeonfb_init, radeonfb_setup },
234 #ifdef CONFIG_FB_RADEON_OLD
235 { "radeonfb_old", radeonfb_old_init, radeonfb_old_setup },
237 #ifdef CONFIG_FB_CONTROL
238 { "controlfb", control_init, control_setup },
240 #ifdef CONFIG_FB_PLATINUM
241 { "platinumfb", platinumfb_init, platinumfb_setup },
243 #ifdef CONFIG_FB_VALKYRIE
244 { "valkyriefb", valkyriefb_init, valkyriefb_setup },
246 #ifdef CONFIG_FB_CT65550
247 { "chipsfb", chips_init, NULL },
249 #ifdef CONFIG_FB_IMSTT
250 { "imsttfb", imsttfb_init, imsttfb_setup },
252 #ifdef CONFIG_FB_S3TRIO
253 { "s3triofb", s3triofb_init, NULL },
256 { "fm2fb", fm2fb_init, fm2fb_setup },
259 { "sisfb", sisfb_init, sisfb_setup },
261 #ifdef CONFIG_FB_TRIDENT
262 { "tridentfb", tridentfb_init, tridentfb_setup },
264 #ifdef CONFIG_FB_I810
265 { "i810fb", i810fb_init, i810fb_setup },
268 { "stifb", stifb_init, stifb_setup },
271 { "ffb", ffb_init, ffb_setup },
274 { "cg6fb", cg6_init, cg6_setup },
277 { "cg3fb", cg3_init, cg3_setup },
280 { "bw2fb", bw2_init, bw2_setup },
282 #ifdef CONFIG_FB_CG14
283 { "cg14fb", cg14_init, cg14_setup },
285 #ifdef CONFIG_FB_P9100
286 { "p9100fb", p9100_init, p9100_setup },
289 { "tcxfb", tcx_init, tcx_setup },
292 { "leofb", leo_init, leo_setup },
296 * Generic drivers that are used as fallbacks
298 * These depend on resource management and must be initialized
299 * _after_ all other frame buffer devices that use resource
304 { "offb", offb_init, NULL },
306 #ifdef CONFIG_FB_VESA
307 { "vesafb", vesafb_init, vesafb_setup },
311 * Chipset specific drivers that don't use resource management (yet)
314 #ifdef CONFIG_FB_SGIVW
315 { "sgivwfb", sgivwfb_init, sgivwfb_setup },
318 { "gbefb", gbefb_init, gbefb_setup },
320 #ifdef CONFIG_FB_ACORN
321 { "acornfb", acornfb_init, acornfb_setup },
323 #ifdef CONFIG_FB_ATARI
324 { "atafb", atafb_init, atafb_setup },
327 { "macfb", macfb_init, macfb_setup },
330 { "hgafb", hgafb_init, hgafb_setup },
333 { "igafb", igafb_init, igafb_setup },
336 { "apollofb", dnfb_init, NULL },
339 { "q40fb", q40fb_init, NULL },
342 { "tgafb", tgafb_init, tgafb_setup },
344 #ifdef CONFIG_FB_HP300
345 { "hpfb", hpfb_init, NULL },
347 #ifdef CONFIG_FB_G364
348 { "g364fb", g364fb_init, NULL },
350 #ifdef CONFIG_FB_SA1100
351 { "sa1100fb", sa1100fb_init, NULL },
354 { "pxafb", pxafb_init, pxafb_setup },
356 #ifdef CONFIG_FB_SUN3
357 { "sun3fb", sun3fb_init, sun3fb_setup },
360 { "hitfb", hitfb_init, NULL },
362 #ifdef CONFIG_FB_TX3912
363 { "tx3912fb", tx3912fb_init, tx3912fb_setup },
365 #ifdef CONFIG_FB_E1355
366 { "e1355fb", e1355fb_init, e1355fb_setup },
368 #ifdef CONFIG_FB_PVR2
369 { "pvr2fb", pvr2fb_init, pvr2fb_setup },
371 #ifdef CONFIG_FB_PMAG_BA
372 { "pmagbafb", pmagbafb_init, NULL },
374 #ifdef CONFIG_FB_PMAGB_B
375 { "pmagbbfb", pmagbbfb_init, NULL },
377 #ifdef CONFIG_FB_MAXINE
378 { "maxinefb", maxinefb_init, NULL },
380 #ifdef CONFIG_FB_VOODOO1
381 { "sstfb", sstfb_init, sstfb_setup },
383 #ifdef CONFIG_FB_KYRO
384 { "kyrofb", kyrofb_init, kyrofb_setup },
386 #ifdef CONFIG_FB_68328
387 { "68328fb", mc68x328fb_init, mc68x328fb_setup },
389 #ifdef CONFIG_FB_ASILIANT
390 { "asiliantfb", asiliantfb_init, NULL },
394 * Generic drivers that don't use resource management (yet)
397 #ifdef CONFIG_FB_VGA16
398 { "vga16fb", vga16fb_init, vga16fb_setup },
401 #ifdef CONFIG_GSP_RESOLVER
402 /* Not a real frame buffer device... */
403 { "resolverfb", NULL, resolver_video_setup },
406 #ifdef CONFIG_FB_VIRTUAL
408 * Vfb must be last to avoid that it becomes your primary display if
409 * other display devices are present
411 { "vfb", vfb_init, vfb_setup },
415 #define NUM_FB_DRIVERS (sizeof(fb_drivers)/sizeof(*fb_drivers))
416 #define FBPIXMAPSIZE 16384
418 extern const char *global_mode_option;
420 static initcall_t pref_init_funcs[FB_MAX];
421 static int num_pref_init_funcs __initdata = 0;
422 static struct notifier_block *fb_notifier_list;
423 struct fb_info *registered_fb[FB_MAX];
424 int num_registered_fb;
427 static int ofonly __initdata = 0;
433 void fb_iomove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
434 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
439 for (i = height; i--; ) {
440 buf->outbuf(info, dst, src, s_pitch);
446 void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
447 u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
452 for (i = height; i--; ) {
453 for (j = 0; j < s_pitch; j++)
460 void fb_iomove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
461 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
462 u32 height, u32 shift_high, u32 shift_low,
465 u8 mask = (u8) (0xfff << shift_high), tmp;
468 for (i = height; i--; ) {
469 for (j = 0; j < idx; j++) {
470 tmp = buf->inbuf(info, dst+j);
472 tmp |= *src >> shift_low;
473 buf->outbuf(info, dst+j, &tmp, 1);
474 tmp = *src << shift_high;
475 buf->outbuf(info, dst+j+1, &tmp, 1);
478 tmp = buf->inbuf(info, dst+idx);
480 tmp |= *src >> shift_low;
481 buf->outbuf(info, dst+idx, &tmp, 1);
482 if (shift_high < mod) {
483 tmp = *src << shift_high;
484 buf->outbuf(info, dst+idx+1, &tmp, 1);
491 void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
492 u8 *dst, u32 d_pitch, u8 *src, u32 idx,
493 u32 height, u32 shift_high, u32 shift_low,
496 u8 mask = (u8) (0xfff << shift_high), tmp;
499 for (i = height; i--; ) {
500 for (j = 0; j < idx; j++) {
503 tmp |= *src >> shift_low;
505 tmp = *src << shift_high;
511 tmp |= *src >> shift_low;
513 if (shift_high < mod) {
514 tmp = *src << shift_high;
523 * we need to lock this section since fb_cursor
524 * may use fb_imageblit()
526 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
528 u32 align = buf->buf_align - 1, offset;
529 char *addr = buf->addr;
531 /* If IO mapped, we need to sync before access, no sharing of
534 if (buf->flags & FB_PIXMAP_IO) {
535 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
536 info->fbops->fb_sync(info);
540 /* See if we fit in the remaining pixmap space */
541 offset = buf->offset + align;
543 if (offset + size > buf->size) {
544 /* We do not fit. In order to be able to re-use the buffer,
545 * we must ensure no asynchronous DMA'ing or whatever operation
546 * is in progress, we sync for that.
548 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
549 info->fbops->fb_sync(info);
552 buf->offset = offset + size;
559 #include <linux/linux_logo.h>
561 static inline unsigned safe_shift(unsigned d, int n)
563 return n < 0 ? d >> -n : d << n;
566 static void __init fb_set_logocmap(struct fb_info *info,
567 const struct linux_logo *logo)
569 struct fb_cmap palette_cmap;
570 u16 palette_green[16];
571 u16 palette_blue[16];
574 const unsigned char *clut = logo->clut;
576 palette_cmap.start = 0;
577 palette_cmap.len = 16;
578 palette_cmap.red = palette_red;
579 palette_cmap.green = palette_green;
580 palette_cmap.blue = palette_blue;
581 palette_cmap.transp = NULL;
583 for (i = 0; i < logo->clutsize; i += n) {
584 n = logo->clutsize - i;
585 /* palette_cmap provides space for only 16 colors at once */
588 palette_cmap.start = 32 + i;
589 palette_cmap.len = n;
590 for (j = 0; j < n; ++j) {
591 palette_cmap.red[j] = clut[0] << 8 | clut[0];
592 palette_cmap.green[j] = clut[1] << 8 | clut[1];
593 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
596 fb_set_cmap(&palette_cmap, 1, info);
600 static void __init fb_set_logo_truepalette(struct fb_info *info,
601 const struct linux_logo *logo,
604 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
605 unsigned char redmask, greenmask, bluemask;
606 int redshift, greenshift, blueshift;
608 const unsigned char *clut = logo->clut;
611 * We have to create a temporary palette since console palette is only
614 /* Bug: Doesn't obey msb_right ... (who needs that?) */
615 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
616 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
617 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
618 redshift = info->var.red.offset - (8 - info->var.red.length);
619 greenshift = info->var.green.offset - (8 - info->var.green.length);
620 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
622 for ( i = 0; i < logo->clutsize; i++) {
623 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
624 safe_shift((clut[1] & greenmask), greenshift) |
625 safe_shift((clut[2] & bluemask), blueshift));
630 static void __init fb_set_logo_directpalette(struct fb_info *info,
631 const struct linux_logo *logo,
634 int redshift, greenshift, blueshift;
637 redshift = info->var.red.offset;
638 greenshift = info->var.green.offset;
639 blueshift = info->var.blue.offset;
641 for (i = 32; i < logo->clutsize; i++)
642 palette[i] = i << redshift | i << greenshift | i << blueshift;
645 static void __init fb_set_logo(struct fb_info *info,
646 const struct linux_logo *logo, u8 *dst,
650 const u8 *src = logo->data;
655 for (i = 0; i < logo->height; i++)
656 for (j = 0; j < logo->width; src++) {
659 if (j < logo->width) {
660 *dst++ = *src & 0x0f;
668 for (i = 0; i < logo->height; i++) {
671 for (j = 0; j < logo->width; j++) {
672 *dst++ = (d >> shift) & 1;
673 shift = (shift-1) & 7;
683 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
684 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
685 * the visual format and color depth of the framebuffer, the DAC, the
686 * pseudo_palette, and the logo data will be adjusted accordingly.
688 * Case 1 - linux_logo_clut224:
689 * Color exceeds the number of console colors (16), thus we set the hardware DAC
690 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
692 * For visuals that require color info from the pseudo_palette, we also construct
693 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
696 * Case 2 - linux_logo_vga16:
697 * The number of colors just matches the console colors, thus there is no need
698 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
699 * each byte contains color information for two pixels (upper and lower nibble).
700 * To be consistent with fb_imageblit() usage, we therefore separate the two
701 * nibbles into separate bytes. The "depth" flag will be set to 4.
703 * Case 3 - linux_logo_mono:
704 * This is similar with Case 2. Each byte contains information for 8 pixels.
705 * We isolate each bit and expand each into a byte. The "depth" flag will
708 static struct logo_data {
710 int needs_directpalette;
711 int needs_truepalette;
713 const struct linux_logo *logo;
716 int fb_prepare_logo(struct fb_info *info)
718 memset(&fb_logo, 0, sizeof(struct logo_data));
720 switch (info->fix.visual) {
721 case FB_VISUAL_TRUECOLOR:
722 if (info->var.bits_per_pixel >= 8)
723 fb_logo.needs_truepalette = 1;
725 case FB_VISUAL_DIRECTCOLOR:
726 if (info->var.bits_per_pixel >= 24) {
727 fb_logo.needs_directpalette = 1;
728 fb_logo.needs_cmapreset = 1;
731 case FB_VISUAL_PSEUDOCOLOR:
732 fb_logo.needs_cmapreset = 1;
736 /* Return if no suitable logo was found */
737 fb_logo.logo = fb_find_logo(info->var.bits_per_pixel);
739 if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
743 /* What depth we asked for might be different from what we get */
744 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
746 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
750 return fb_logo.logo->height;
753 int fb_show_logo(struct fb_info *info)
755 u32 *palette = NULL, *saved_pseudo_palette = NULL;
756 unsigned char *logo_new = NULL;
757 struct fb_image image;
760 /* Return if the frame buffer is not mapped or suspended */
761 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
764 image.depth = fb_logo.depth;
765 image.data = fb_logo.logo->data;
767 if (fb_logo.needs_cmapreset)
768 fb_set_logocmap(info, fb_logo.logo);
770 if (fb_logo.needs_truepalette ||
771 fb_logo.needs_directpalette) {
772 palette = kmalloc(256 * 4, GFP_KERNEL);
776 if (fb_logo.needs_truepalette)
777 fb_set_logo_truepalette(info, fb_logo.logo, palette);
779 fb_set_logo_directpalette(info, fb_logo.logo, palette);
781 saved_pseudo_palette = info->pseudo_palette;
782 info->pseudo_palette = palette;
785 if (fb_logo.depth == 4) {
786 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
788 if (logo_new == NULL) {
791 if (saved_pseudo_palette)
792 info->pseudo_palette = saved_pseudo_palette;
795 image.data = logo_new;
796 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
799 image.width = fb_logo.logo->width;
800 image.height = fb_logo.logo->height;
803 for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
804 x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
806 info->fbops->fb_imageblit(info, &image);
811 if (saved_pseudo_palette != NULL)
812 info->pseudo_palette = saved_pseudo_palette;
813 if (logo_new != NULL)
815 return fb_logo.logo->height;
818 int fb_prepare_logo(struct fb_info *info) { return 0; }
819 int fb_show_logo(struct fb_info *info) { return 0; }
820 #endif /* CONFIG_LOGO */
822 static int fbmem_read_proc(char *buf, char **start, off_t offset,
823 int len, int *eof, void *private)
829 for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++)
831 clen += sprintf(buf + clen, "%d %s\n",
834 *start = buf + offset;
839 return clen < len ? clen : len;
843 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
845 unsigned long p = *ppos;
846 struct inode *inode = file->f_dentry->d_inode;
847 int fbidx = iminor(inode);
848 struct fb_info *info = registered_fb[fbidx];
850 if (!info || ! info->screen_base)
853 if (info->state != FBINFO_STATE_RUNNING)
856 if (info->fbops->fb_read)
857 return info->fbops->fb_read(file, buf, count, ppos);
859 if (p >= info->fix.smem_len)
861 if (count >= info->fix.smem_len)
862 count = info->fix.smem_len;
863 if (count + p > info->fix.smem_len)
864 count = info->fix.smem_len - p;
865 if (info->fbops->fb_sync)
866 info->fbops->fb_sync(info);
870 base_addr = info->screen_base;
871 count -= copy_to_user(buf, base_addr+p, count);
880 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
882 unsigned long p = *ppos;
883 struct inode *inode = file->f_dentry->d_inode;
884 int fbidx = iminor(inode);
885 struct fb_info *info = registered_fb[fbidx];
888 if (!info || !info->screen_base)
891 if (info->state != FBINFO_STATE_RUNNING)
894 if (info->fbops->fb_write)
895 return info->fbops->fb_write(file, buf, count, ppos);
897 if (p > info->fix.smem_len)
899 if (count >= info->fix.smem_len)
900 count = info->fix.smem_len;
902 if (count + p > info->fix.smem_len) {
903 count = info->fix.smem_len - p;
906 if (info->fbops->fb_sync)
907 info->fbops->fb_sync(info);
911 base_addr = info->screen_base;
912 count -= copy_from_user(base_addr+p, buf, count);
922 static void try_to_load(int fb)
924 request_module("fb%d", fb);
926 #endif /* CONFIG_KMOD */
929 fb_load_cursor_image(struct fb_info *info)
931 unsigned int width = (info->cursor.image.width + 7) >> 3;
932 u8 *data = (u8 *) info->cursor.image.data;
934 if (info->sprite.outbuf)
935 info->sprite.outbuf(info, info->sprite.addr, data, width);
937 memcpy(info->sprite.addr, data, width);
941 fb_cursor(struct fb_info *info, struct fb_cursor *sprite)
943 struct fb_cursor cursor;
946 if (copy_from_user(&cursor, sprite, sizeof(struct fb_cursor)))
949 if (cursor.set & FB_CUR_SETCUR)
950 info->cursor.enable = 1;
952 if (cursor.set & FB_CUR_SETCMAP) {
953 err = fb_copy_cmap(&cursor.image.cmap, &sprite->image.cmap, 1);
958 if (cursor.set & FB_CUR_SETSHAPE) {
959 int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;
962 if ((cursor.image.height != info->cursor.image.height) ||
963 (cursor.image.width != info->cursor.image.width))
964 cursor.set |= FB_CUR_SETSIZE;
966 data = kmalloc(size, GFP_KERNEL);
970 mask = kmalloc(size, GFP_KERNEL);
976 if (copy_from_user(data, sprite->image.data, size) ||
977 copy_from_user(mask, sprite->mask, size)) {
982 cursor.image.data = data;
985 info->cursor.set = cursor.set;
986 info->cursor.rop = cursor.rop;
987 err = info->fbops->fb_cursor(info, &cursor);
992 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
994 int xoffset = var->xoffset;
995 int yoffset = var->yoffset;
998 if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
999 xoffset + info->var.xres > info->var.xres_virtual ||
1000 yoffset + info->var.yres > info->var.yres_virtual)
1002 if ((err = info->fbops->fb_pan_display(var, info)))
1004 info->var.xoffset = var->xoffset;
1005 info->var.yoffset = var->yoffset;
1006 if (var->vmode & FB_VMODE_YWRAP)
1007 info->var.vmode |= FB_VMODE_YWRAP;
1009 info->var.vmode &= ~FB_VMODE_YWRAP;
1014 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
1018 if ((var->activate & FB_ACTIVATE_FORCE) ||
1019 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
1020 if (!info->fbops->fb_check_var) {
1025 if ((err = info->fbops->fb_check_var(var, info)))
1028 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
1031 if (info->fbops->fb_set_par)
1032 info->fbops->fb_set_par(info);
1034 fb_pan_display(info, &info->var);
1036 fb_set_cmap(&info->cmap, 1, info);
1038 if (info->flags & FBINFO_MISC_MODECHANGEUSER) {
1039 info->flags &= ~FBINFO_MISC_MODECHANGEUSER;
1040 notifier_call_chain(&fb_notifier_list,
1041 FB_EVENT_MODE_CHANGE, info);
1049 fb_blank(struct fb_info *info, int blank)
1051 /* ??? Variable sized stack allocation. */
1052 u16 black[info->cmap.len];
1053 struct fb_cmap cmap;
1055 if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
1058 memset(black, 0, info->cmap.len * sizeof(u16));
1059 cmap.red = cmap.green = cmap.blue = black;
1060 cmap.transp = info->cmap.transp ? black : NULL;
1061 cmap.start = info->cmap.start;
1062 cmap.len = info->cmap.len;
1065 return fb_set_cmap(&cmap, 1, info);
1069 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1072 int fbidx = iminor(inode);
1073 struct fb_info *info = registered_fb[fbidx];
1074 struct fb_ops *fb = info->fbops;
1075 struct fb_var_screeninfo var;
1076 struct fb_fix_screeninfo fix;
1077 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1078 struct fb_con2fbmap con2fb;
1080 struct fb_cmap cmap;
1086 case FBIOGET_VSCREENINFO:
1087 return copy_to_user((void *) arg, &info->var,
1088 sizeof(var)) ? -EFAULT : 0;
1089 case FBIOPUT_VSCREENINFO:
1090 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1092 acquire_console_sem();
1093 info->flags |= FBINFO_MISC_MODECHANGEUSER;
1094 i = fb_set_var(info, &var);
1095 info->flags &= ~FBINFO_MISC_MODECHANGEUSER;
1096 release_console_sem();
1098 if (copy_to_user((void *) arg, &var, sizeof(var)))
1101 case FBIOGET_FSCREENINFO:
1102 return copy_to_user((void *) arg, &info->fix,
1103 sizeof(fix)) ? -EFAULT : 0;
1105 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1107 return (fb_set_cmap(&cmap, 0, info));
1109 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1111 return (fb_copy_cmap(&info->cmap, &cmap, 2));
1112 case FBIOPAN_DISPLAY:
1113 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1115 acquire_console_sem();
1116 i = fb_pan_display(info, &var);
1117 release_console_sem();
1120 if (copy_to_user((void *) arg, &var, sizeof(var)))
1124 acquire_console_sem();
1125 i = fb_cursor(info, (struct fb_cursor *) arg);
1126 release_console_sem();
1128 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1129 case FBIOGET_CON2FBMAP:
1130 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1132 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1134 con2fb.framebuffer = con2fb_map[con2fb.console-1];
1135 return copy_to_user((void *)arg, &con2fb,
1136 sizeof(con2fb)) ? -EFAULT : 0;
1137 case FBIOPUT_CON2FBMAP:
1138 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1140 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
1142 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1145 if (!registered_fb[con2fb.framebuffer])
1146 try_to_load(con2fb.framebuffer);
1147 #endif /* CONFIG_KMOD */
1148 if (!registered_fb[con2fb.framebuffer])
1150 if (con2fb.console > 0 && con2fb.console < MAX_NR_CONSOLES)
1151 return set_con2fb_map(con2fb.console-1,
1152 con2fb.framebuffer);
1154 #endif /* CONFIG_FRAMEBUFFER_CONSOLE */
1156 acquire_console_sem();
1157 i = fb_blank(info, arg);
1158 release_console_sem();
1161 if (fb->fb_ioctl == NULL)
1163 return fb->fb_ioctl(inode, file, cmd, arg, info);
1168 fb_mmap(struct file *file, struct vm_area_struct * vma)
1170 int fbidx = iminor(file->f_dentry->d_inode);
1171 struct fb_info *info = registered_fb[fbidx];
1172 struct fb_ops *fb = info->fbops;
1174 #if !defined(__sparc__) || defined(__sparc_v9__)
1175 unsigned long start;
1179 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1181 off = vma->vm_pgoff << PAGE_SHIFT;
1187 res = fb->fb_mmap(info, file, vma);
1192 #if defined(__sparc__) && !defined(__sparc_v9__)
1193 /* Should never get here, all fb drivers should have their own
1200 /* frame buffer memory */
1201 start = info->fix.smem_start;
1202 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1204 /* memory mapped io */
1206 if (info->var.accel_flags) {
1210 start = info->fix.mmio_start;
1211 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1215 if ((vma->vm_end - vma->vm_start + off) > len)
1218 vma->vm_pgoff = off >> PAGE_SHIFT;
1219 /* This is an IO map - tell maydump to skip this VMA */
1220 vma->vm_flags |= VM_IO;
1221 #if defined(__sparc_v9__)
1222 vma->vm_flags |= (VM_SHM | VM_LOCKED);
1223 if (io_remap_page_range(vma, vma->vm_start, off,
1224 vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
1227 #if defined(__mc68000__)
1228 #if defined(CONFIG_SUN3)
1229 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1230 #elif defined(CONFIG_MMU)
1231 if (CPU_IS_020_OR_030)
1232 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1233 if (CPU_IS_040_OR_060) {
1234 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1235 /* Use no-cache mode, serialized */
1236 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1239 #elif defined(__powerpc__)
1240 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
1241 #elif defined(__alpha__)
1242 /* Caching is off in the I/O space quadrant by design. */
1243 #elif defined(__i386__) || defined(__x86_64__)
1244 if (boot_cpu_data.x86 > 3)
1245 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1246 #elif defined(__mips__)
1247 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1248 #elif defined(__hppa__)
1249 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1250 #elif defined(__ia64__) || defined(__arm__) || defined(__sh__)
1251 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1253 #warning What do we have to do here??
1255 if (io_remap_page_range(vma, vma->vm_start, off,
1256 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1258 #endif /* !__sparc_v9__ */
1260 #endif /* !sparc32 */
1264 fb_open(struct inode *inode, struct file *file)
1266 int fbidx = iminor(inode);
1267 struct fb_info *info;
1270 if (fbidx >= FB_MAX)
1273 if (!(info = registered_fb[fbidx]))
1275 #endif /* CONFIG_KMOD */
1276 if (!(info = registered_fb[fbidx]))
1278 if (!try_module_get(info->fbops->owner))
1280 if (info->fbops->fb_open) {
1281 res = info->fbops->fb_open(info,1);
1283 module_put(info->fbops->owner);
1289 fb_release(struct inode *inode, struct file *file)
1291 int fbidx = iminor(inode);
1292 struct fb_info *info;
1295 info = registered_fb[fbidx];
1296 if (info->fbops->fb_release)
1297 info->fbops->fb_release(info,1);
1298 module_put(info->fbops->owner);
1303 static struct file_operations fb_fops = {
1304 .owner = THIS_MODULE,
1310 .release = fb_release,
1311 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1312 .get_unmapped_area = get_fb_unmapped_area,
1316 static struct class_simple *fb_class;
1319 * register_framebuffer - registers a frame buffer device
1320 * @fb_info: frame buffer info structure
1322 * Registers a frame buffer device @fb_info.
1324 * Returns negative errno on error, or zero for success.
1329 register_framebuffer(struct fb_info *fb_info)
1332 struct class_device *c;
1334 if (num_registered_fb == FB_MAX)
1336 num_registered_fb++;
1337 for (i = 0 ; i < FB_MAX; i++)
1338 if (!registered_fb[i])
1342 c = class_simple_device_add(fb_class, MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1345 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(c));
1348 if (fb_info->pixmap.addr == NULL) {
1349 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1350 if (fb_info->pixmap.addr) {
1351 fb_info->pixmap.size = FBPIXMAPSIZE;
1352 fb_info->pixmap.buf_align = 1;
1353 fb_info->pixmap.scan_align = 1;
1354 fb_info->pixmap.access_align = 4;
1355 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1358 fb_info->pixmap.offset = 0;
1360 if (fb_info->sprite.addr == NULL) {
1361 fb_info->sprite.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1362 if (fb_info->sprite.addr) {
1363 fb_info->sprite.size = FBPIXMAPSIZE;
1364 fb_info->sprite.buf_align = 1;
1365 fb_info->sprite.scan_align = 1;
1366 fb_info->sprite.access_align = 4;
1367 fb_info->sprite.flags = FB_PIXMAP_DEFAULT;
1370 fb_info->sprite.offset = 0;
1372 registered_fb[i] = fb_info;
1374 devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1375 S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1381 * unregister_framebuffer - releases a frame buffer device
1382 * @fb_info: frame buffer info structure
1384 * Unregisters a frame buffer device @fb_info.
1386 * Returns negative errno on error, or zero for success.
1391 unregister_framebuffer(struct fb_info *fb_info)
1396 if (!registered_fb[i])
1398 devfs_remove("fb/%d", i);
1400 if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1401 kfree(fb_info->pixmap.addr);
1402 if (fb_info->sprite.addr && (fb_info->sprite.flags & FB_PIXMAP_DEFAULT))
1403 kfree(fb_info->sprite.addr);
1404 registered_fb[i]=NULL;
1405 num_registered_fb--;
1406 class_simple_device_remove(MKDEV(FB_MAJOR, i));
1411 * fb_register_client - register a client notifier
1412 * @nb: notifier block to callback on events
1414 int fb_register_client(struct notifier_block *nb)
1416 return notifier_chain_register(&fb_notifier_list, nb);
1420 * fb_unregister_client - unregister a client notifier
1421 * @nb: notifier block to callback on events
1423 int fb_unregister_client(struct notifier_block *nb)
1425 return notifier_chain_unregister(&fb_notifier_list, nb);
1429 * fb_set_suspend - low level driver signals suspend
1430 * @info: framebuffer affected
1431 * @state: 0 = resuming, !=0 = suspending
1433 * This is meant to be used by low level drivers to
1434 * signal suspend/resume to the core & clients.
1435 * It must be called with the console semaphore held
1437 void fb_set_suspend(struct fb_info *info, int state)
1440 notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, info);
1441 info->state = FBINFO_STATE_SUSPENDED;
1443 info->state = FBINFO_STATE_RUNNING;
1444 notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, info);
1449 * fbmem_init - init frame buffer subsystem
1451 * Initialize the frame buffer subsystem.
1453 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1462 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1465 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1466 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1468 fb_class = class_simple_create(THIS_MODULE, "graphics");
1469 if (IS_ERR(fb_class)) {
1470 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1482 * Probe for all builtin frame buffer devices
1484 for (i = 0; i < num_pref_init_funcs; i++)
1485 pref_init_funcs[i]();
1487 for (i = 0; i < NUM_FB_DRIVERS; i++)
1488 if (fb_drivers[i].init)
1489 fb_drivers[i].init();
1494 * video_setup - process command line options
1495 * @options: string of options
1497 * Process command line options for frame buffer subsystem.
1499 * NOTE: This function is a __setup and __init function.
1505 int __init video_setup(char *options)
1509 if (!options || !*options)
1513 if (!strcmp(options, "ofonly")) {
1519 if (num_pref_init_funcs == FB_MAX)
1522 for (i = 0; i < NUM_FB_DRIVERS; i++) {
1523 j = strlen(fb_drivers[i].name);
1524 if (!strncmp(options, fb_drivers[i].name, j) &&
1525 options[j] == ':') {
1526 if (!strcmp(options+j+1, "off"))
1527 fb_drivers[i].init = NULL;
1529 if (fb_drivers[i].init) {
1530 pref_init_funcs[num_pref_init_funcs++] =
1532 fb_drivers[i].init = NULL;
1534 if (fb_drivers[i].setup)
1535 fb_drivers[i].setup(options+j+1);
1542 * If we get here no fb was specified.
1543 * We consider the argument to be a global video mode option.
1545 global_mode_option = options;
1549 __setup("video=", video_setup);
1552 * Visible symbols for modules
1555 EXPORT_SYMBOL(register_framebuffer);
1556 EXPORT_SYMBOL(unregister_framebuffer);
1557 EXPORT_SYMBOL(num_registered_fb);
1558 EXPORT_SYMBOL(registered_fb);
1559 EXPORT_SYMBOL(fb_prepare_logo);
1560 EXPORT_SYMBOL(fb_show_logo);
1561 EXPORT_SYMBOL(fb_set_var);
1562 EXPORT_SYMBOL(fb_blank);
1563 EXPORT_SYMBOL(fb_pan_display);
1564 EXPORT_SYMBOL(fb_get_buffer_offset);
1565 EXPORT_SYMBOL(fb_iomove_buf_unaligned);
1566 EXPORT_SYMBOL(fb_iomove_buf_aligned);
1567 EXPORT_SYMBOL(fb_sysmove_buf_unaligned);
1568 EXPORT_SYMBOL(fb_sysmove_buf_aligned);
1569 EXPORT_SYMBOL(fb_load_cursor_image);
1570 EXPORT_SYMBOL(fb_set_suspend);
1571 EXPORT_SYMBOL(fb_register_client);
1572 EXPORT_SYMBOL(fb_unregister_client);
1574 MODULE_LICENSE("GPL");