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![Tim Schmielau](/assets/img/avatar_default.png)
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1569 lines
37 KiB
C
1569 lines
37 KiB
C
/*
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* linux/drivers/video/fbmem.c
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*
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* Copyright (C) 1994 Martin Schaller
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*
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* 2001 - Documented with DocBook
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* - Brad Douglas <brad@neruo.com>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/module.h>
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#include <linux/compat.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/smp_lock.h>
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#include <linux/kernel.h>
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#include <linux/major.h>
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#include <linux/slab.h>
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#include <linux/mm.h>
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#include <linux/mman.h>
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#include <linux/vt.h>
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#include <linux/init.h>
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#include <linux/linux_logo.h>
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#include <linux/proc_fs.h>
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#include <linux/console.h>
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#ifdef CONFIG_KMOD
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#include <linux/kmod.h>
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#endif
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#include <linux/err.h>
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#include <linux/device.h>
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#include <linux/efi.h>
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#if defined(__mc68000__) || defined(CONFIG_APUS)
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#include <asm/setup.h>
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#endif
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <linux/fb.h>
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/*
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* Frame buffer device initialization and setup routines
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*/
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#define FBPIXMAPSIZE (1024 * 8)
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struct fb_info *registered_fb[FB_MAX] __read_mostly;
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int num_registered_fb __read_mostly;
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/*
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* Helpers
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*/
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int fb_get_color_depth(struct fb_var_screeninfo *var,
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struct fb_fix_screeninfo *fix)
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{
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int depth = 0;
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if (fix->visual == FB_VISUAL_MONO01 ||
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fix->visual == FB_VISUAL_MONO10)
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depth = 1;
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else {
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if (var->green.length == var->blue.length &&
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var->green.length == var->red.length &&
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var->green.offset == var->blue.offset &&
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var->green.offset == var->red.offset)
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depth = var->green.length;
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else
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depth = var->green.length + var->red.length +
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var->blue.length;
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}
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return depth;
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}
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EXPORT_SYMBOL(fb_get_color_depth);
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/*
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* Data padding functions.
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*/
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void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
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{
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__fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
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}
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EXPORT_SYMBOL(fb_pad_aligned_buffer);
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void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
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u32 shift_high, u32 shift_low, u32 mod)
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{
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u8 mask = (u8) (0xfff << shift_high), tmp;
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int i, j;
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for (i = height; i--; ) {
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for (j = 0; j < idx; j++) {
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tmp = dst[j];
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tmp &= mask;
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tmp |= *src >> shift_low;
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dst[j] = tmp;
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tmp = *src << shift_high;
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dst[j+1] = tmp;
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src++;
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}
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tmp = dst[idx];
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tmp &= mask;
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tmp |= *src >> shift_low;
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dst[idx] = tmp;
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if (shift_high < mod) {
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tmp = *src << shift_high;
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dst[idx+1] = tmp;
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}
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src++;
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dst += d_pitch;
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}
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}
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EXPORT_SYMBOL(fb_pad_unaligned_buffer);
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/*
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* we need to lock this section since fb_cursor
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* may use fb_imageblit()
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*/
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char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
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{
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u32 align = buf->buf_align - 1, offset;
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char *addr = buf->addr;
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/* If IO mapped, we need to sync before access, no sharing of
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* the pixmap is done
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*/
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if (buf->flags & FB_PIXMAP_IO) {
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if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
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info->fbops->fb_sync(info);
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return addr;
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}
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/* See if we fit in the remaining pixmap space */
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offset = buf->offset + align;
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offset &= ~align;
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if (offset + size > buf->size) {
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/* We do not fit. In order to be able to re-use the buffer,
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* we must ensure no asynchronous DMA'ing or whatever operation
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* is in progress, we sync for that.
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*/
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if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
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info->fbops->fb_sync(info);
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offset = 0;
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}
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buf->offset = offset + size;
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addr += offset;
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return addr;
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}
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#ifdef CONFIG_LOGO
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static inline unsigned safe_shift(unsigned d, int n)
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{
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return n < 0 ? d >> -n : d << n;
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}
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static void fb_set_logocmap(struct fb_info *info,
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const struct linux_logo *logo)
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{
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struct fb_cmap palette_cmap;
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u16 palette_green[16];
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u16 palette_blue[16];
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u16 palette_red[16];
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int i, j, n;
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const unsigned char *clut = logo->clut;
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palette_cmap.start = 0;
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palette_cmap.len = 16;
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palette_cmap.red = palette_red;
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palette_cmap.green = palette_green;
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palette_cmap.blue = palette_blue;
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palette_cmap.transp = NULL;
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for (i = 0; i < logo->clutsize; i += n) {
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n = logo->clutsize - i;
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/* palette_cmap provides space for only 16 colors at once */
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if (n > 16)
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n = 16;
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palette_cmap.start = 32 + i;
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palette_cmap.len = n;
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for (j = 0; j < n; ++j) {
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palette_cmap.red[j] = clut[0] << 8 | clut[0];
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palette_cmap.green[j] = clut[1] << 8 | clut[1];
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palette_cmap.blue[j] = clut[2] << 8 | clut[2];
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clut += 3;
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}
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fb_set_cmap(&palette_cmap, info);
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}
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}
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static void fb_set_logo_truepalette(struct fb_info *info,
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const struct linux_logo *logo,
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u32 *palette)
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{
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static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
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unsigned char redmask, greenmask, bluemask;
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int redshift, greenshift, blueshift;
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int i;
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const unsigned char *clut = logo->clut;
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/*
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* We have to create a temporary palette since console palette is only
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* 16 colors long.
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*/
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/* Bug: Doesn't obey msb_right ... (who needs that?) */
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redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
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greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
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bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
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redshift = info->var.red.offset - (8 - info->var.red.length);
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greenshift = info->var.green.offset - (8 - info->var.green.length);
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blueshift = info->var.blue.offset - (8 - info->var.blue.length);
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for ( i = 0; i < logo->clutsize; i++) {
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palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
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safe_shift((clut[1] & greenmask), greenshift) |
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safe_shift((clut[2] & bluemask), blueshift));
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clut += 3;
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}
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}
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static void fb_set_logo_directpalette(struct fb_info *info,
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const struct linux_logo *logo,
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u32 *palette)
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{
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int redshift, greenshift, blueshift;
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int i;
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redshift = info->var.red.offset;
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greenshift = info->var.green.offset;
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blueshift = info->var.blue.offset;
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for (i = 32; i < logo->clutsize; i++)
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palette[i] = i << redshift | i << greenshift | i << blueshift;
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}
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static void fb_set_logo(struct fb_info *info,
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const struct linux_logo *logo, u8 *dst,
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int depth)
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{
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int i, j, k;
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const u8 *src = logo->data;
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u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
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u8 fg = 1, d;
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if (fb_get_color_depth(&info->var, &info->fix) == 3)
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fg = 7;
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if (info->fix.visual == FB_VISUAL_MONO01 ||
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info->fix.visual == FB_VISUAL_MONO10)
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fg = ~((u8) (0xfff << info->var.green.length));
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switch (depth) {
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case 4:
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for (i = 0; i < logo->height; i++)
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for (j = 0; j < logo->width; src++) {
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*dst++ = *src >> 4;
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j++;
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if (j < logo->width) {
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*dst++ = *src & 0x0f;
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j++;
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}
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}
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break;
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case 1:
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for (i = 0; i < logo->height; i++) {
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for (j = 0; j < logo->width; src++) {
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d = *src ^ xor;
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for (k = 7; k >= 0; k--) {
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*dst++ = ((d >> k) & 1) ? fg : 0;
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j++;
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}
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}
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}
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break;
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}
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}
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/*
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* Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
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* linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
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* the visual format and color depth of the framebuffer, the DAC, the
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* pseudo_palette, and the logo data will be adjusted accordingly.
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*
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* Case 1 - linux_logo_clut224:
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* Color exceeds the number of console colors (16), thus we set the hardware DAC
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* using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
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*
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* For visuals that require color info from the pseudo_palette, we also construct
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* one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
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* will be set.
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*
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* Case 2 - linux_logo_vga16:
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* The number of colors just matches the console colors, thus there is no need
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* to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
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* each byte contains color information for two pixels (upper and lower nibble).
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* To be consistent with fb_imageblit() usage, we therefore separate the two
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* nibbles into separate bytes. The "depth" flag will be set to 4.
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*
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* Case 3 - linux_logo_mono:
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* This is similar with Case 2. Each byte contains information for 8 pixels.
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* We isolate each bit and expand each into a byte. The "depth" flag will
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* be set to 1.
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*/
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static struct logo_data {
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int depth;
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int needs_directpalette;
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int needs_truepalette;
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int needs_cmapreset;
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const struct linux_logo *logo;
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} fb_logo __read_mostly;
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static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
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{
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u32 size = width * height, i;
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out += size - 1;
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for (i = size; i--; )
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*out-- = *in++;
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}
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static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
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{
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int i, j, h = height - 1;
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for (i = 0; i < height; i++)
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for (j = 0; j < width; j++)
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out[height * j + h - i] = *in++;
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}
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static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
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{
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int i, j, w = width - 1;
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for (i = 0; i < height; i++)
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for (j = 0; j < width; j++)
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out[height * (w - j) + i] = *in++;
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}
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static void fb_rotate_logo(struct fb_info *info, u8 *dst,
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struct fb_image *image, int rotate)
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{
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u32 tmp;
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if (rotate == FB_ROTATE_UD) {
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fb_rotate_logo_ud(image->data, dst, image->width,
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image->height);
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image->dx = info->var.xres - image->width;
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image->dy = info->var.yres - image->height;
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} else if (rotate == FB_ROTATE_CW) {
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fb_rotate_logo_cw(image->data, dst, image->width,
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image->height);
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tmp = image->width;
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image->width = image->height;
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image->height = tmp;
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image->dx = info->var.xres - image->width;
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} else if (rotate == FB_ROTATE_CCW) {
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fb_rotate_logo_ccw(image->data, dst, image->width,
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image->height);
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tmp = image->width;
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image->width = image->height;
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image->height = tmp;
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image->dy = info->var.yres - image->height;
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}
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image->data = dst;
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}
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static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
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int rotate)
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{
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int x;
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if (rotate == FB_ROTATE_UR) {
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for (x = 0; x < num_online_cpus() &&
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x * (fb_logo.logo->width + 8) <=
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info->var.xres - fb_logo.logo->width; x++) {
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info->fbops->fb_imageblit(info, image);
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image->dx += fb_logo.logo->width + 8;
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}
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} else if (rotate == FB_ROTATE_UD) {
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for (x = 0; x < num_online_cpus() &&
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x * (fb_logo.logo->width + 8) <=
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info->var.xres - fb_logo.logo->width; x++) {
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info->fbops->fb_imageblit(info, image);
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image->dx -= fb_logo.logo->width + 8;
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}
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} else if (rotate == FB_ROTATE_CW) {
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for (x = 0; x < num_online_cpus() &&
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x * (fb_logo.logo->width + 8) <=
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info->var.yres - fb_logo.logo->width; x++) {
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info->fbops->fb_imageblit(info, image);
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image->dy += fb_logo.logo->width + 8;
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}
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} else if (rotate == FB_ROTATE_CCW) {
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for (x = 0; x < num_online_cpus() &&
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x * (fb_logo.logo->width + 8) <=
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info->var.yres - fb_logo.logo->width; x++) {
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info->fbops->fb_imageblit(info, image);
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image->dy -= fb_logo.logo->width + 8;
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}
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}
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}
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int fb_prepare_logo(struct fb_info *info, int rotate)
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{
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int depth = fb_get_color_depth(&info->var, &info->fix);
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int yres;
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memset(&fb_logo, 0, sizeof(struct logo_data));
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if (info->flags & FBINFO_MISC_TILEBLITTING)
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return 0;
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if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
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depth = info->var.blue.length;
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if (info->var.red.length < depth)
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depth = info->var.red.length;
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if (info->var.green.length < depth)
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depth = info->var.green.length;
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}
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if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
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/* assume console colormap */
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depth = 4;
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}
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|
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if (depth >= 8) {
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switch (info->fix.visual) {
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case FB_VISUAL_TRUECOLOR:
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fb_logo.needs_truepalette = 1;
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break;
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case FB_VISUAL_DIRECTCOLOR:
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fb_logo.needs_directpalette = 1;
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fb_logo.needs_cmapreset = 1;
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break;
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case FB_VISUAL_PSEUDOCOLOR:
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fb_logo.needs_cmapreset = 1;
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break;
|
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}
|
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}
|
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|
|
/* Return if no suitable logo was found */
|
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fb_logo.logo = fb_find_logo(depth);
|
|
|
|
if (!fb_logo.logo) {
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return 0;
|
|
}
|
|
|
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if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
|
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yres = info->var.yres;
|
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else
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yres = info->var.xres;
|
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|
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if (fb_logo.logo->height > yres) {
|
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fb_logo.logo = NULL;
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return 0;
|
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}
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|
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/* What depth we asked for might be different from what we get */
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if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
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fb_logo.depth = 8;
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else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
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fb_logo.depth = 4;
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else
|
|
fb_logo.depth = 1;
|
|
return fb_logo.logo->height;
|
|
}
|
|
|
|
int fb_show_logo(struct fb_info *info, int rotate)
|
|
{
|
|
u32 *palette = NULL, *saved_pseudo_palette = NULL;
|
|
unsigned char *logo_new = NULL, *logo_rotate = NULL;
|
|
struct fb_image image;
|
|
|
|
/* Return if the frame buffer is not mapped or suspended */
|
|
if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
|
|
return 0;
|
|
|
|
image.depth = 8;
|
|
image.data = fb_logo.logo->data;
|
|
|
|
if (fb_logo.needs_cmapreset)
|
|
fb_set_logocmap(info, fb_logo.logo);
|
|
|
|
if (fb_logo.needs_truepalette ||
|
|
fb_logo.needs_directpalette) {
|
|
palette = kmalloc(256 * 4, GFP_KERNEL);
|
|
if (palette == NULL)
|
|
return 0;
|
|
|
|
if (fb_logo.needs_truepalette)
|
|
fb_set_logo_truepalette(info, fb_logo.logo, palette);
|
|
else
|
|
fb_set_logo_directpalette(info, fb_logo.logo, palette);
|
|
|
|
saved_pseudo_palette = info->pseudo_palette;
|
|
info->pseudo_palette = palette;
|
|
}
|
|
|
|
if (fb_logo.depth <= 4) {
|
|
logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
|
|
GFP_KERNEL);
|
|
if (logo_new == NULL) {
|
|
kfree(palette);
|
|
if (saved_pseudo_palette)
|
|
info->pseudo_palette = saved_pseudo_palette;
|
|
return 0;
|
|
}
|
|
image.data = logo_new;
|
|
fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
|
|
}
|
|
|
|
image.dx = 0;
|
|
image.dy = 0;
|
|
image.width = fb_logo.logo->width;
|
|
image.height = fb_logo.logo->height;
|
|
|
|
if (rotate) {
|
|
logo_rotate = kmalloc(fb_logo.logo->width *
|
|
fb_logo.logo->height, GFP_KERNEL);
|
|
if (logo_rotate)
|
|
fb_rotate_logo(info, logo_rotate, &image, rotate);
|
|
}
|
|
|
|
fb_do_show_logo(info, &image, rotate);
|
|
|
|
kfree(palette);
|
|
if (saved_pseudo_palette != NULL)
|
|
info->pseudo_palette = saved_pseudo_palette;
|
|
kfree(logo_new);
|
|
kfree(logo_rotate);
|
|
return fb_logo.logo->height;
|
|
}
|
|
#else
|
|
int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
|
|
int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
|
|
#endif /* CONFIG_LOGO */
|
|
|
|
static int fbmem_read_proc(char *buf, char **start, off_t offset,
|
|
int len, int *eof, void *private)
|
|
{
|
|
struct fb_info **fi;
|
|
int clen;
|
|
|
|
clen = 0;
|
|
for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && clen < 4000;
|
|
fi++)
|
|
if (*fi)
|
|
clen += sprintf(buf + clen, "%d %s\n",
|
|
(*fi)->node,
|
|
(*fi)->fix.id);
|
|
*start = buf + offset;
|
|
if (clen > offset)
|
|
clen -= offset;
|
|
else
|
|
clen = 0;
|
|
return clen < len ? clen : len;
|
|
}
|
|
|
|
static ssize_t
|
|
fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
|
|
{
|
|
unsigned long p = *ppos;
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
|
int fbidx = iminor(inode);
|
|
struct fb_info *info = registered_fb[fbidx];
|
|
u32 *buffer, *dst;
|
|
u32 __iomem *src;
|
|
int c, i, cnt = 0, err = 0;
|
|
unsigned long total_size;
|
|
|
|
if (!info || ! info->screen_base)
|
|
return -ENODEV;
|
|
|
|
if (info->state != FBINFO_STATE_RUNNING)
|
|
return -EPERM;
|
|
|
|
if (info->fbops->fb_read)
|
|
return info->fbops->fb_read(file, buf, count, ppos);
|
|
|
|
total_size = info->screen_size;
|
|
|
|
if (total_size == 0)
|
|
total_size = info->fix.smem_len;
|
|
|
|
if (p >= total_size)
|
|
return 0;
|
|
|
|
if (count >= total_size)
|
|
count = total_size;
|
|
|
|
if (count + p > total_size)
|
|
count = total_size - p;
|
|
|
|
buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
|
|
GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
src = (u32 __iomem *) (info->screen_base + p);
|
|
|
|
if (info->fbops->fb_sync)
|
|
info->fbops->fb_sync(info);
|
|
|
|
while (count) {
|
|
c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
|
|
dst = buffer;
|
|
for (i = c >> 2; i--; )
|
|
*dst++ = fb_readl(src++);
|
|
if (c & 3) {
|
|
u8 *dst8 = (u8 *) dst;
|
|
u8 __iomem *src8 = (u8 __iomem *) src;
|
|
|
|
for (i = c & 3; i--;)
|
|
*dst8++ = fb_readb(src8++);
|
|
|
|
src = (u32 __iomem *) src8;
|
|
}
|
|
|
|
if (copy_to_user(buf, buffer, c)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
*ppos += c;
|
|
buf += c;
|
|
cnt += c;
|
|
count -= c;
|
|
}
|
|
|
|
kfree(buffer);
|
|
|
|
return (err) ? err : cnt;
|
|
}
|
|
|
|
static ssize_t
|
|
fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
|
|
{
|
|
unsigned long p = *ppos;
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
|
int fbidx = iminor(inode);
|
|
struct fb_info *info = registered_fb[fbidx];
|
|
u32 *buffer, *src;
|
|
u32 __iomem *dst;
|
|
int c, i, cnt = 0, err = 0;
|
|
unsigned long total_size;
|
|
|
|
if (!info || !info->screen_base)
|
|
return -ENODEV;
|
|
|
|
if (info->state != FBINFO_STATE_RUNNING)
|
|
return -EPERM;
|
|
|
|
if (info->fbops->fb_write)
|
|
return info->fbops->fb_write(file, buf, count, ppos);
|
|
|
|
total_size = info->screen_size;
|
|
|
|
if (total_size == 0)
|
|
total_size = info->fix.smem_len;
|
|
|
|
if (p > total_size)
|
|
return -EFBIG;
|
|
|
|
if (count > total_size) {
|
|
err = -EFBIG;
|
|
count = total_size;
|
|
}
|
|
|
|
if (count + p > total_size) {
|
|
if (!err)
|
|
err = -ENOSPC;
|
|
|
|
count = total_size - p;
|
|
}
|
|
|
|
buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
|
|
GFP_KERNEL);
|
|
if (!buffer)
|
|
return -ENOMEM;
|
|
|
|
dst = (u32 __iomem *) (info->screen_base + p);
|
|
|
|
if (info->fbops->fb_sync)
|
|
info->fbops->fb_sync(info);
|
|
|
|
while (count) {
|
|
c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
|
|
src = buffer;
|
|
|
|
if (copy_from_user(src, buf, c)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
for (i = c >> 2; i--; )
|
|
fb_writel(*src++, dst++);
|
|
|
|
if (c & 3) {
|
|
u8 *src8 = (u8 *) src;
|
|
u8 __iomem *dst8 = (u8 __iomem *) dst;
|
|
|
|
for (i = c & 3; i--; )
|
|
fb_writeb(*src8++, dst8++);
|
|
|
|
dst = (u32 __iomem *) dst8;
|
|
}
|
|
|
|
*ppos += c;
|
|
buf += c;
|
|
cnt += c;
|
|
count -= c;
|
|
}
|
|
|
|
kfree(buffer);
|
|
|
|
return (cnt) ? cnt : err;
|
|
}
|
|
|
|
#ifdef CONFIG_KMOD
|
|
static void try_to_load(int fb)
|
|
{
|
|
request_module("fb%d", fb);
|
|
}
|
|
#endif /* CONFIG_KMOD */
|
|
|
|
int
|
|
fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
|
|
{
|
|
struct fb_fix_screeninfo *fix = &info->fix;
|
|
int xoffset = var->xoffset;
|
|
int yoffset = var->yoffset;
|
|
int err = 0, yres = info->var.yres;
|
|
|
|
if (var->yoffset > 0) {
|
|
if (var->vmode & FB_VMODE_YWRAP) {
|
|
if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
|
|
err = -EINVAL;
|
|
else
|
|
yres = 0;
|
|
} else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
|
|
err = -EINVAL;
|
|
}
|
|
|
|
if (var->xoffset > 0 && (!fix->xpanstep ||
|
|
(var->xoffset % fix->xpanstep)))
|
|
err = -EINVAL;
|
|
|
|
if (err || !info->fbops->fb_pan_display || xoffset < 0 ||
|
|
yoffset < 0 || var->yoffset + yres > info->var.yres_virtual ||
|
|
var->xoffset + info->var.xres > info->var.xres_virtual)
|
|
return -EINVAL;
|
|
|
|
if ((err = info->fbops->fb_pan_display(var, info)))
|
|
return err;
|
|
info->var.xoffset = var->xoffset;
|
|
info->var.yoffset = var->yoffset;
|
|
if (var->vmode & FB_VMODE_YWRAP)
|
|
info->var.vmode |= FB_VMODE_YWRAP;
|
|
else
|
|
info->var.vmode &= ~FB_VMODE_YWRAP;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
|
|
{
|
|
int err, flags = info->flags;
|
|
|
|
if (var->activate & FB_ACTIVATE_INV_MODE) {
|
|
struct fb_videomode mode1, mode2;
|
|
int ret = 0;
|
|
|
|
fb_var_to_videomode(&mode1, var);
|
|
fb_var_to_videomode(&mode2, &info->var);
|
|
/* make sure we don't delete the videomode of current var */
|
|
ret = fb_mode_is_equal(&mode1, &mode2);
|
|
|
|
if (!ret) {
|
|
struct fb_event event;
|
|
|
|
event.info = info;
|
|
event.data = &mode1;
|
|
ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
|
|
}
|
|
|
|
if (!ret)
|
|
fb_delete_videomode(&mode1, &info->modelist);
|
|
|
|
return ret;
|
|
}
|
|
|
|
if ((var->activate & FB_ACTIVATE_FORCE) ||
|
|
memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
|
|
if (!info->fbops->fb_check_var) {
|
|
*var = info->var;
|
|
return 0;
|
|
}
|
|
|
|
if ((err = info->fbops->fb_check_var(var, info)))
|
|
return err;
|
|
|
|
if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
|
|
struct fb_videomode mode;
|
|
int err = 0;
|
|
|
|
info->var = *var;
|
|
if (info->fbops->fb_set_par)
|
|
info->fbops->fb_set_par(info);
|
|
|
|
fb_pan_display(info, &info->var);
|
|
|
|
fb_set_cmap(&info->cmap, info);
|
|
|
|
fb_var_to_videomode(&mode, &info->var);
|
|
|
|
if (info->modelist.prev && info->modelist.next &&
|
|
!list_empty(&info->modelist))
|
|
err = fb_add_videomode(&mode, &info->modelist);
|
|
|
|
if (!err && (flags & FBINFO_MISC_USEREVENT)) {
|
|
struct fb_event event;
|
|
int evnt = (var->activate & FB_ACTIVATE_ALL) ?
|
|
FB_EVENT_MODE_CHANGE_ALL :
|
|
FB_EVENT_MODE_CHANGE;
|
|
|
|
info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
event.info = info;
|
|
fb_notifier_call_chain(evnt, &event);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
fb_blank(struct fb_info *info, int blank)
|
|
{
|
|
int ret = -EINVAL;
|
|
|
|
if (blank > FB_BLANK_POWERDOWN)
|
|
blank = FB_BLANK_POWERDOWN;
|
|
|
|
if (info->fbops->fb_blank)
|
|
ret = info->fbops->fb_blank(blank, info);
|
|
|
|
if (!ret) {
|
|
struct fb_event event;
|
|
|
|
event.info = info;
|
|
event.data = ␣
|
|
fb_notifier_call_chain(FB_EVENT_BLANK, &event);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
int fbidx = iminor(inode);
|
|
struct fb_info *info = registered_fb[fbidx];
|
|
struct fb_ops *fb = info->fbops;
|
|
struct fb_var_screeninfo var;
|
|
struct fb_fix_screeninfo fix;
|
|
struct fb_con2fbmap con2fb;
|
|
struct fb_cmap_user cmap;
|
|
struct fb_event event;
|
|
void __user *argp = (void __user *)arg;
|
|
int i;
|
|
|
|
if (!fb)
|
|
return -ENODEV;
|
|
switch (cmd) {
|
|
case FBIOGET_VSCREENINFO:
|
|
return copy_to_user(argp, &info->var,
|
|
sizeof(var)) ? -EFAULT : 0;
|
|
case FBIOPUT_VSCREENINFO:
|
|
if (copy_from_user(&var, argp, sizeof(var)))
|
|
return -EFAULT;
|
|
acquire_console_sem();
|
|
info->flags |= FBINFO_MISC_USEREVENT;
|
|
i = fb_set_var(info, &var);
|
|
info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
release_console_sem();
|
|
if (i) return i;
|
|
if (copy_to_user(argp, &var, sizeof(var)))
|
|
return -EFAULT;
|
|
return 0;
|
|
case FBIOGET_FSCREENINFO:
|
|
return copy_to_user(argp, &info->fix,
|
|
sizeof(fix)) ? -EFAULT : 0;
|
|
case FBIOPUTCMAP:
|
|
if (copy_from_user(&cmap, argp, sizeof(cmap)))
|
|
return -EFAULT;
|
|
return (fb_set_user_cmap(&cmap, info));
|
|
case FBIOGETCMAP:
|
|
if (copy_from_user(&cmap, argp, sizeof(cmap)))
|
|
return -EFAULT;
|
|
return fb_cmap_to_user(&info->cmap, &cmap);
|
|
case FBIOPAN_DISPLAY:
|
|
if (copy_from_user(&var, argp, sizeof(var)))
|
|
return -EFAULT;
|
|
acquire_console_sem();
|
|
i = fb_pan_display(info, &var);
|
|
release_console_sem();
|
|
if (i)
|
|
return i;
|
|
if (copy_to_user(argp, &var, sizeof(var)))
|
|
return -EFAULT;
|
|
return 0;
|
|
case FBIO_CURSOR:
|
|
return -EINVAL;
|
|
case FBIOGET_CON2FBMAP:
|
|
if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
|
|
return -EFAULT;
|
|
if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
|
|
return -EINVAL;
|
|
con2fb.framebuffer = -1;
|
|
event.info = info;
|
|
event.data = &con2fb;
|
|
fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
|
|
return copy_to_user(argp, &con2fb,
|
|
sizeof(con2fb)) ? -EFAULT : 0;
|
|
case FBIOPUT_CON2FBMAP:
|
|
if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
|
|
return - EFAULT;
|
|
if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
|
|
return -EINVAL;
|
|
if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
|
|
return -EINVAL;
|
|
#ifdef CONFIG_KMOD
|
|
if (!registered_fb[con2fb.framebuffer])
|
|
try_to_load(con2fb.framebuffer);
|
|
#endif /* CONFIG_KMOD */
|
|
if (!registered_fb[con2fb.framebuffer])
|
|
return -EINVAL;
|
|
event.info = info;
|
|
event.data = &con2fb;
|
|
return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP,
|
|
&event);
|
|
case FBIOBLANK:
|
|
acquire_console_sem();
|
|
info->flags |= FBINFO_MISC_USEREVENT;
|
|
i = fb_blank(info, arg);
|
|
info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
release_console_sem();
|
|
return i;
|
|
default:
|
|
if (fb->fb_ioctl == NULL)
|
|
return -EINVAL;
|
|
return fb->fb_ioctl(info, cmd, arg);
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
struct fb_fix_screeninfo32 {
|
|
char id[16];
|
|
compat_caddr_t smem_start;
|
|
u32 smem_len;
|
|
u32 type;
|
|
u32 type_aux;
|
|
u32 visual;
|
|
u16 xpanstep;
|
|
u16 ypanstep;
|
|
u16 ywrapstep;
|
|
u32 line_length;
|
|
compat_caddr_t mmio_start;
|
|
u32 mmio_len;
|
|
u32 accel;
|
|
u16 reserved[3];
|
|
};
|
|
|
|
struct fb_cmap32 {
|
|
u32 start;
|
|
u32 len;
|
|
compat_caddr_t red;
|
|
compat_caddr_t green;
|
|
compat_caddr_t blue;
|
|
compat_caddr_t transp;
|
|
};
|
|
|
|
static int fb_getput_cmap(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct fb_cmap_user __user *cmap;
|
|
struct fb_cmap32 __user *cmap32;
|
|
__u32 data;
|
|
int err;
|
|
|
|
cmap = compat_alloc_user_space(sizeof(*cmap));
|
|
cmap32 = compat_ptr(arg);
|
|
|
|
if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
|
|
return -EFAULT;
|
|
|
|
if (get_user(data, &cmap32->red) ||
|
|
put_user(compat_ptr(data), &cmap->red) ||
|
|
get_user(data, &cmap32->green) ||
|
|
put_user(compat_ptr(data), &cmap->green) ||
|
|
get_user(data, &cmap32->blue) ||
|
|
put_user(compat_ptr(data), &cmap->blue) ||
|
|
get_user(data, &cmap32->transp) ||
|
|
put_user(compat_ptr(data), &cmap->transp))
|
|
return -EFAULT;
|
|
|
|
err = fb_ioctl(inode, file, cmd, (unsigned long) cmap);
|
|
|
|
if (!err) {
|
|
if (copy_in_user(&cmap32->start,
|
|
&cmap->start,
|
|
2 * sizeof(__u32)))
|
|
err = -EFAULT;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
|
|
struct fb_fix_screeninfo32 __user *fix32)
|
|
{
|
|
__u32 data;
|
|
int err;
|
|
|
|
err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
|
|
|
|
data = (__u32) (unsigned long) fix->smem_start;
|
|
err |= put_user(data, &fix32->smem_start);
|
|
|
|
err |= put_user(fix->smem_len, &fix32->smem_len);
|
|
err |= put_user(fix->type, &fix32->type);
|
|
err |= put_user(fix->type_aux, &fix32->type_aux);
|
|
err |= put_user(fix->visual, &fix32->visual);
|
|
err |= put_user(fix->xpanstep, &fix32->xpanstep);
|
|
err |= put_user(fix->ypanstep, &fix32->ypanstep);
|
|
err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
|
|
err |= put_user(fix->line_length, &fix32->line_length);
|
|
|
|
data = (__u32) (unsigned long) fix->mmio_start;
|
|
err |= put_user(data, &fix32->mmio_start);
|
|
|
|
err |= put_user(fix->mmio_len, &fix32->mmio_len);
|
|
err |= put_user(fix->accel, &fix32->accel);
|
|
err |= copy_to_user(fix32->reserved, fix->reserved,
|
|
sizeof(fix->reserved));
|
|
|
|
return err;
|
|
}
|
|
|
|
static int fb_get_fscreeninfo(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
mm_segment_t old_fs;
|
|
struct fb_fix_screeninfo fix;
|
|
struct fb_fix_screeninfo32 __user *fix32;
|
|
int err;
|
|
|
|
fix32 = compat_ptr(arg);
|
|
|
|
old_fs = get_fs();
|
|
set_fs(KERNEL_DS);
|
|
err = fb_ioctl(inode, file, cmd, (unsigned long) &fix);
|
|
set_fs(old_fs);
|
|
|
|
if (!err)
|
|
err = do_fscreeninfo_to_user(&fix, fix32);
|
|
|
|
return err;
|
|
}
|
|
|
|
static long
|
|
fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
|
int fbidx = iminor(inode);
|
|
struct fb_info *info = registered_fb[fbidx];
|
|
struct fb_ops *fb = info->fbops;
|
|
long ret = -ENOIOCTLCMD;
|
|
|
|
lock_kernel();
|
|
switch(cmd) {
|
|
case FBIOGET_VSCREENINFO:
|
|
case FBIOPUT_VSCREENINFO:
|
|
case FBIOPAN_DISPLAY:
|
|
case FBIOGET_CON2FBMAP:
|
|
case FBIOPUT_CON2FBMAP:
|
|
arg = (unsigned long) compat_ptr(arg);
|
|
case FBIOBLANK:
|
|
ret = fb_ioctl(inode, file, cmd, arg);
|
|
break;
|
|
|
|
case FBIOGET_FSCREENINFO:
|
|
ret = fb_get_fscreeninfo(inode, file, cmd, arg);
|
|
break;
|
|
|
|
case FBIOGETCMAP:
|
|
case FBIOPUTCMAP:
|
|
ret = fb_getput_cmap(inode, file, cmd, arg);
|
|
break;
|
|
|
|
default:
|
|
if (fb->fb_compat_ioctl)
|
|
ret = fb->fb_compat_ioctl(info, cmd, arg);
|
|
break;
|
|
}
|
|
unlock_kernel();
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
fb_mmap(struct file *file, struct vm_area_struct * vma)
|
|
{
|
|
int fbidx = iminor(file->f_path.dentry->d_inode);
|
|
struct fb_info *info = registered_fb[fbidx];
|
|
struct fb_ops *fb = info->fbops;
|
|
unsigned long off;
|
|
#if !defined(__sparc__) || defined(__sparc_v9__)
|
|
unsigned long start;
|
|
u32 len;
|
|
#endif
|
|
|
|
if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
|
|
return -EINVAL;
|
|
off = vma->vm_pgoff << PAGE_SHIFT;
|
|
if (!fb)
|
|
return -ENODEV;
|
|
if (fb->fb_mmap) {
|
|
int res;
|
|
lock_kernel();
|
|
res = fb->fb_mmap(info, vma);
|
|
unlock_kernel();
|
|
return res;
|
|
}
|
|
|
|
#if defined(__sparc__) && !defined(__sparc_v9__)
|
|
/* Should never get here, all fb drivers should have their own
|
|
mmap routines */
|
|
return -EINVAL;
|
|
#else
|
|
/* !sparc32... */
|
|
lock_kernel();
|
|
|
|
/* frame buffer memory */
|
|
start = info->fix.smem_start;
|
|
len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
|
|
if (off >= len) {
|
|
/* memory mapped io */
|
|
off -= len;
|
|
if (info->var.accel_flags) {
|
|
unlock_kernel();
|
|
return -EINVAL;
|
|
}
|
|
start = info->fix.mmio_start;
|
|
len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
|
|
}
|
|
unlock_kernel();
|
|
start &= PAGE_MASK;
|
|
if ((vma->vm_end - vma->vm_start + off) > len)
|
|
return -EINVAL;
|
|
off += start;
|
|
vma->vm_pgoff = off >> PAGE_SHIFT;
|
|
/* This is an IO map - tell maydump to skip this VMA */
|
|
vma->vm_flags |= VM_IO | VM_RESERVED;
|
|
#if defined(__mc68000__)
|
|
#if defined(CONFIG_SUN3)
|
|
pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
|
|
#elif defined(CONFIG_MMU)
|
|
if (CPU_IS_020_OR_030)
|
|
pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
|
|
if (CPU_IS_040_OR_060) {
|
|
pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
|
|
/* Use no-cache mode, serialized */
|
|
pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
|
|
}
|
|
#endif
|
|
#elif defined(__powerpc__)
|
|
vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT,
|
|
vma->vm_end - vma->vm_start,
|
|
vma->vm_page_prot);
|
|
#elif defined(__alpha__)
|
|
/* Caching is off in the I/O space quadrant by design. */
|
|
#elif defined(__i386__) || defined(__x86_64__)
|
|
if (boot_cpu_data.x86 > 3)
|
|
pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
|
|
#elif defined(__mips__) || defined(__sparc_v9__)
|
|
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
|
#elif defined(__hppa__)
|
|
pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
|
|
#elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
|
|
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
|
|
#elif defined(__ia64__)
|
|
if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
|
|
vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
|
|
else
|
|
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
|
|
#else
|
|
#warning What do we have to do here??
|
|
#endif
|
|
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
|
|
vma->vm_end - vma->vm_start, vma->vm_page_prot))
|
|
return -EAGAIN;
|
|
return 0;
|
|
#endif /* !sparc32 */
|
|
}
|
|
|
|
static int
|
|
fb_open(struct inode *inode, struct file *file)
|
|
{
|
|
int fbidx = iminor(inode);
|
|
struct fb_info *info;
|
|
int res = 0;
|
|
|
|
if (fbidx >= FB_MAX)
|
|
return -ENODEV;
|
|
#ifdef CONFIG_KMOD
|
|
if (!(info = registered_fb[fbidx]))
|
|
try_to_load(fbidx);
|
|
#endif /* CONFIG_KMOD */
|
|
if (!(info = registered_fb[fbidx]))
|
|
return -ENODEV;
|
|
if (!try_module_get(info->fbops->owner))
|
|
return -ENODEV;
|
|
file->private_data = info;
|
|
if (info->fbops->fb_open) {
|
|
res = info->fbops->fb_open(info,1);
|
|
if (res)
|
|
module_put(info->fbops->owner);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
fb_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct fb_info * const info = file->private_data;
|
|
|
|
lock_kernel();
|
|
if (info->fbops->fb_release)
|
|
info->fbops->fb_release(info,1);
|
|
module_put(info->fbops->owner);
|
|
unlock_kernel();
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations fb_fops = {
|
|
.owner = THIS_MODULE,
|
|
.read = fb_read,
|
|
.write = fb_write,
|
|
.ioctl = fb_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = fb_compat_ioctl,
|
|
#endif
|
|
.mmap = fb_mmap,
|
|
.open = fb_open,
|
|
.release = fb_release,
|
|
#ifdef HAVE_ARCH_FB_UNMAPPED_AREA
|
|
.get_unmapped_area = get_fb_unmapped_area,
|
|
#endif
|
|
};
|
|
|
|
struct class *fb_class;
|
|
EXPORT_SYMBOL(fb_class);
|
|
/**
|
|
* register_framebuffer - registers a frame buffer device
|
|
* @fb_info: frame buffer info structure
|
|
*
|
|
* Registers a frame buffer device @fb_info.
|
|
*
|
|
* Returns negative errno on error, or zero for success.
|
|
*
|
|
*/
|
|
|
|
int
|
|
register_framebuffer(struct fb_info *fb_info)
|
|
{
|
|
int i;
|
|
struct fb_event event;
|
|
struct fb_videomode mode;
|
|
|
|
if (num_registered_fb == FB_MAX)
|
|
return -ENXIO;
|
|
num_registered_fb++;
|
|
for (i = 0 ; i < FB_MAX; i++)
|
|
if (!registered_fb[i])
|
|
break;
|
|
fb_info->node = i;
|
|
|
|
fb_info->dev = device_create(fb_class, fb_info->device,
|
|
MKDEV(FB_MAJOR, i), "fb%d", i);
|
|
if (IS_ERR(fb_info->dev)) {
|
|
/* Not fatal */
|
|
printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
|
|
fb_info->dev = NULL;
|
|
} else
|
|
fb_init_device(fb_info);
|
|
|
|
if (fb_info->pixmap.addr == NULL) {
|
|
fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
|
|
if (fb_info->pixmap.addr) {
|
|
fb_info->pixmap.size = FBPIXMAPSIZE;
|
|
fb_info->pixmap.buf_align = 1;
|
|
fb_info->pixmap.scan_align = 1;
|
|
fb_info->pixmap.access_align = 32;
|
|
fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
|
|
}
|
|
}
|
|
fb_info->pixmap.offset = 0;
|
|
|
|
if (!fb_info->modelist.prev || !fb_info->modelist.next)
|
|
INIT_LIST_HEAD(&fb_info->modelist);
|
|
|
|
fb_var_to_videomode(&mode, &fb_info->var);
|
|
fb_add_videomode(&mode, &fb_info->modelist);
|
|
registered_fb[i] = fb_info;
|
|
|
|
event.info = fb_info;
|
|
fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* unregister_framebuffer - releases a frame buffer device
|
|
* @fb_info: frame buffer info structure
|
|
*
|
|
* Unregisters a frame buffer device @fb_info.
|
|
*
|
|
* Returns negative errno on error, or zero for success.
|
|
*
|
|
*/
|
|
|
|
int
|
|
unregister_framebuffer(struct fb_info *fb_info)
|
|
{
|
|
struct fb_event event;
|
|
int i;
|
|
|
|
i = fb_info->node;
|
|
if (!registered_fb[i])
|
|
return -EINVAL;
|
|
|
|
if (fb_info->pixmap.addr &&
|
|
(fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
|
|
kfree(fb_info->pixmap.addr);
|
|
fb_destroy_modelist(&fb_info->modelist);
|
|
registered_fb[i]=NULL;
|
|
num_registered_fb--;
|
|
fb_cleanup_device(fb_info);
|
|
device_destroy(fb_class, MKDEV(FB_MAJOR, i));
|
|
event.info = fb_info;
|
|
fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* fb_set_suspend - low level driver signals suspend
|
|
* @info: framebuffer affected
|
|
* @state: 0 = resuming, !=0 = suspending
|
|
*
|
|
* This is meant to be used by low level drivers to
|
|
* signal suspend/resume to the core & clients.
|
|
* It must be called with the console semaphore held
|
|
*/
|
|
void fb_set_suspend(struct fb_info *info, int state)
|
|
{
|
|
struct fb_event event;
|
|
|
|
event.info = info;
|
|
if (state) {
|
|
fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
|
|
info->state = FBINFO_STATE_SUSPENDED;
|
|
} else {
|
|
info->state = FBINFO_STATE_RUNNING;
|
|
fb_notifier_call_chain(FB_EVENT_RESUME, &event);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* fbmem_init - init frame buffer subsystem
|
|
*
|
|
* Initialize the frame buffer subsystem.
|
|
*
|
|
* NOTE: This function is _only_ to be called by drivers/char/mem.c.
|
|
*
|
|
*/
|
|
|
|
static int __init
|
|
fbmem_init(void)
|
|
{
|
|
create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
|
|
|
|
if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
|
|
printk("unable to get major %d for fb devs\n", FB_MAJOR);
|
|
|
|
fb_class = class_create(THIS_MODULE, "graphics");
|
|
if (IS_ERR(fb_class)) {
|
|
printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
|
|
fb_class = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifdef MODULE
|
|
module_init(fbmem_init);
|
|
static void __exit
|
|
fbmem_exit(void)
|
|
{
|
|
class_destroy(fb_class);
|
|
unregister_chrdev(FB_MAJOR, "fb");
|
|
}
|
|
|
|
module_exit(fbmem_exit);
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Framebuffer base");
|
|
#else
|
|
subsys_initcall(fbmem_init);
|
|
#endif
|
|
|
|
int fb_new_modelist(struct fb_info *info)
|
|
{
|
|
struct fb_event event;
|
|
struct fb_var_screeninfo var = info->var;
|
|
struct list_head *pos, *n;
|
|
struct fb_modelist *modelist;
|
|
struct fb_videomode *m, mode;
|
|
int err = 1;
|
|
|
|
list_for_each_safe(pos, n, &info->modelist) {
|
|
modelist = list_entry(pos, struct fb_modelist, list);
|
|
m = &modelist->mode;
|
|
fb_videomode_to_var(&var, m);
|
|
var.activate = FB_ACTIVATE_TEST;
|
|
err = fb_set_var(info, &var);
|
|
fb_var_to_videomode(&mode, &var);
|
|
if (err || !fb_mode_is_equal(m, &mode)) {
|
|
list_del(pos);
|
|
kfree(pos);
|
|
}
|
|
}
|
|
|
|
err = 1;
|
|
|
|
if (!list_empty(&info->modelist)) {
|
|
event.info = info;
|
|
err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static char *video_options[FB_MAX] __read_mostly;
|
|
static int ofonly __read_mostly;
|
|
|
|
extern const char *global_mode_option;
|
|
|
|
/**
|
|
* fb_get_options - get kernel boot parameters
|
|
* @name: framebuffer name as it would appear in
|
|
* the boot parameter line
|
|
* (video=<name>:<options>)
|
|
* @option: the option will be stored here
|
|
*
|
|
* NOTE: Needed to maintain backwards compatibility
|
|
*/
|
|
int fb_get_options(char *name, char **option)
|
|
{
|
|
char *opt, *options = NULL;
|
|
int opt_len, retval = 0;
|
|
int name_len = strlen(name), i;
|
|
|
|
if (name_len && ofonly && strncmp(name, "offb", 4))
|
|
retval = 1;
|
|
|
|
if (name_len && !retval) {
|
|
for (i = 0; i < FB_MAX; i++) {
|
|
if (video_options[i] == NULL)
|
|
continue;
|
|
opt_len = strlen(video_options[i]);
|
|
if (!opt_len)
|
|
continue;
|
|
opt = video_options[i];
|
|
if (!strncmp(name, opt, name_len) &&
|
|
opt[name_len] == ':')
|
|
options = opt + name_len + 1;
|
|
}
|
|
}
|
|
if (options && !strncmp(options, "off", 3))
|
|
retval = 1;
|
|
|
|
if (option)
|
|
*option = options;
|
|
|
|
return retval;
|
|
}
|
|
|
|
#ifndef MODULE
|
|
/**
|
|
* video_setup - process command line options
|
|
* @options: string of options
|
|
*
|
|
* Process command line options for frame buffer subsystem.
|
|
*
|
|
* NOTE: This function is a __setup and __init function.
|
|
* It only stores the options. Drivers have to call
|
|
* fb_get_options() as necessary.
|
|
*
|
|
* Returns zero.
|
|
*
|
|
*/
|
|
static int __init video_setup(char *options)
|
|
{
|
|
int i, global = 0;
|
|
|
|
if (!options || !*options)
|
|
global = 1;
|
|
|
|
if (!global && !strncmp(options, "ofonly", 6)) {
|
|
ofonly = 1;
|
|
global = 1;
|
|
}
|
|
|
|
if (!global && !strstr(options, "fb:")) {
|
|
global_mode_option = options;
|
|
global = 1;
|
|
}
|
|
|
|
if (!global) {
|
|
for (i = 0; i < FB_MAX; i++) {
|
|
if (video_options[i] == NULL) {
|
|
video_options[i] = options;
|
|
break;
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
__setup("video=", video_setup);
|
|
#endif
|
|
|
|
/*
|
|
* Visible symbols for modules
|
|
*/
|
|
|
|
EXPORT_SYMBOL(register_framebuffer);
|
|
EXPORT_SYMBOL(unregister_framebuffer);
|
|
EXPORT_SYMBOL(num_registered_fb);
|
|
EXPORT_SYMBOL(registered_fb);
|
|
EXPORT_SYMBOL(fb_prepare_logo);
|
|
EXPORT_SYMBOL(fb_show_logo);
|
|
EXPORT_SYMBOL(fb_set_var);
|
|
EXPORT_SYMBOL(fb_blank);
|
|
EXPORT_SYMBOL(fb_pan_display);
|
|
EXPORT_SYMBOL(fb_get_buffer_offset);
|
|
EXPORT_SYMBOL(fb_set_suspend);
|
|
EXPORT_SYMBOL(fb_get_options);
|
|
|
|
MODULE_LICENSE("GPL");
|