2005-04-16 16:20:36 -06:00
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/*
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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/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/sched.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/tty.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/devfs_fs_kernel.h>
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#include <linux/err.h>
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#include <linux/kernel.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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static struct notifier_block *fb_notifier_list;
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struct fb_info *registered_fb[FB_MAX];
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int num_registered_fb;
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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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{
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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->red.offset)
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return var->green.length;
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else
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return (var->green.length + var->red.length +
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var->blue.length);
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}
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EXPORT_SYMBOL(fb_get_color_depth);
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/*
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2005-06-21 18:16:58 -06:00
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* Data padding functions.
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2005-04-16 16:20:36 -06:00
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*/
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2005-06-21 18:17:07 -06:00
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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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2005-04-16 16:20:36 -06:00
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{
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2005-06-21 18:16:58 -06:00
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int i;
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2005-04-16 16:20:36 -06:00
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for (i = height; i--; ) {
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2005-06-21 18:16:58 -06:00
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memcpy(dst, src, s_pitch);
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2005-04-16 16:20:36 -06:00
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src += s_pitch;
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dst += d_pitch;
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}
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}
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2005-06-21 18:17:07 -06:00
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EXPORT_SYMBOL(fb_pad_aligned_buffer);
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2005-04-16 16:20:36 -06:00
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2005-06-21 18:17:07 -06:00
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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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2005-04-16 16:20:36 -06:00
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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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2005-06-21 18:17:07 -06:00
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EXPORT_SYMBOL(fb_pad_unaligned_buffer);
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2005-04-16 16:20:36 -06:00
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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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#include <linux/linux_logo.h>
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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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unsigned char mask[9] = { 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, fg = 1;
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const u8 *src = logo->data;
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u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
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if (fb_get_color_depth(&info->var) == 3)
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fg = 7;
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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;
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int fb_prepare_logo(struct fb_info *info)
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{
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int depth = fb_get_color_depth(&info->var);
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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 (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);
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if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
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fb_logo.logo = NULL;
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return 0;
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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)
|
|
|
|
fb_logo.depth = 4;
|
|
|
|
else
|
|
|
|
fb_logo.depth = 1;
|
|
|
|
return fb_logo.logo->height;
|
|
|
|
}
|
|
|
|
|
|
|
|
int fb_show_logo(struct fb_info *info)
|
|
|
|
{
|
|
|
|
u32 *palette = NULL, *saved_pseudo_palette = NULL;
|
|
|
|
unsigned char *logo_new = NULL;
|
|
|
|
struct fb_image image;
|
|
|
|
int x;
|
|
|
|
|
|
|
|
/* 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.width = fb_logo.logo->width;
|
|
|
|
image.height = fb_logo.logo->height;
|
|
|
|
image.dy = 0;
|
|
|
|
|
|
|
|
for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
|
|
|
|
x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
|
|
|
|
image.dx = x;
|
|
|
|
info->fbops->fb_imageblit(info, &image);
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(palette);
|
|
|
|
if (saved_pseudo_palette != NULL)
|
|
|
|
info->pseudo_palette = saved_pseudo_palette;
|
|
|
|
kfree(logo_new);
|
|
|
|
return fb_logo.logo->height;
|
|
|
|
}
|
|
|
|
#else
|
|
|
|
int fb_prepare_logo(struct fb_info *info) { return 0; }
|
|
|
|
int fb_show_logo(struct fb_info *info) { 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] && len < 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_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;
|
|
|
|
|
|
|
|
cnt = 0;
|
|
|
|
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_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;
|
|
|
|
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 -ENOSPC;
|
|
|
|
if (count >= total_size)
|
|
|
|
count = total_size;
|
|
|
|
err = 0;
|
|
|
|
if (count + p > total_size) {
|
|
|
|
count = total_size - p;
|
|
|
|
err = -ENOSPC;
|
|
|
|
}
|
|
|
|
cnt = 0;
|
|
|
|
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 (err) ? err : cnt;
|
|
|
|
}
|
|
|
|
|
|
|
|
#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)
|
|
|
|
{
|
|
|
|
int xoffset = var->xoffset;
|
|
|
|
int yoffset = var->yoffset;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
|
|
|
|
xoffset + info->var.xres > info->var.xres_virtual ||
|
|
|
|
yoffset + info->var.yres > info->var.yres_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;
|
|
|
|
|
|
|
|
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 = notifier_call_chain(&fb_notifier_list,
|
|
|
|
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 && info->flags & FBINFO_MISC_USEREVENT) {
|
|
|
|
struct fb_event event;
|
|
|
|
|
|
|
|
info->flags &= ~FBINFO_MISC_USEREVENT;
|
|
|
|
event.info = info;
|
|
|
|
notifier_call_chain(&fb_notifier_list,
|
|
|
|
FB_EVENT_MODE_CHANGE,
|
|
|
|
&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 = ␣
|
|
|
|
notifier_call_chain(&fb_notifier_list, 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;
|
|
|
|
notifier_call_chain(&fb_notifier_list,
|
|
|
|
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 notifier_call_chain(&fb_notifier_list,
|
|
|
|
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(inode, file, cmd, arg, info);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
|
|
static long
|
|
|
|
fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
int fbidx = iminor(file->f_dentry->d_inode);
|
|
|
|
struct fb_info *info = registered_fb[fbidx];
|
|
|
|
struct fb_ops *fb = info->fbops;
|
|
|
|
long ret;
|
|
|
|
|
|
|
|
if (fb->fb_compat_ioctl == NULL)
|
|
|
|
return -ENOIOCTLCMD;
|
|
|
|
lock_kernel();
|
|
|
|
ret = fb->fb_compat_ioctl(file, cmd, arg, info);
|
|
|
|
unlock_kernel();
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int
|
|
|
|
fb_mmap(struct file *file, struct vm_area_struct * vma)
|
|
|
|
{
|
|
|
|
int fbidx = iminor(file->f_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, file, 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(__sparc_v9__)
|
|
|
|
if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
|
|
|
|
vma->vm_end - vma->vm_start, vma->vm_page_prot))
|
|
|
|
return -EAGAIN;
|
|
|
|
#else
|
|
|
|
#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,
|
|
|
|
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__)
|
|
|
|
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;
|
|
|
|
#endif /* !__sparc_v9__ */
|
|
|
|
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;
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
int fbidx = iminor(inode);
|
|
|
|
struct fb_info *info;
|
|
|
|
|
|
|
|
lock_kernel();
|
|
|
|
info = registered_fb[fbidx];
|
|
|
|
if (info->fbops->fb_release)
|
|
|
|
info->fbops->fb_release(info,1);
|
|
|
|
module_put(info->fbops->owner);
|
|
|
|
unlock_kernel();
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static 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
|
|
|
|
};
|
|
|
|
|
2005-03-23 11:01:41 -07:00
|
|
|
static struct class *fb_class;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
/**
|
|
|
|
* 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;
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
2005-03-23 11:01:41 -07:00
|
|
|
fb_info->class_device = class_device_create(fb_class, MKDEV(FB_MAJOR, i),
|
2005-04-16 16:20:36 -06:00
|
|
|
fb_info->device, "fb%d", i);
|
|
|
|
if (IS_ERR(fb_info->class_device)) {
|
|
|
|
/* Not fatal */
|
|
|
|
printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device));
|
|
|
|
fb_info->class_device = NULL;
|
|
|
|
} else
|
|
|
|
fb_init_class_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;
|
2005-06-21 18:17:08 -06:00
|
|
|
fb_info->pixmap.access_align = 32;
|
2005-04-16 16:20:36 -06:00
|
|
|
fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
fb_info->pixmap.offset = 0;
|
|
|
|
|
|
|
|
if (!fb_info->modelist.prev ||
|
|
|
|
!fb_info->modelist.next ||
|
|
|
|
list_empty(&fb_info->modelist)) {
|
|
|
|
struct fb_videomode mode;
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
|
|
|
devfs_mk_cdev(MKDEV(FB_MAJOR, i),
|
|
|
|
S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
|
|
|
|
event.info = fb_info;
|
|
|
|
notifier_call_chain(&fb_notifier_list,
|
|
|
|
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)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
i = fb_info->node;
|
|
|
|
if (!registered_fb[i])
|
|
|
|
return -EINVAL;
|
|
|
|
devfs_remove("fb/%d", i);
|
|
|
|
|
|
|
|
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_class_device(fb_info);
|
2005-03-23 11:01:41 -07:00
|
|
|
class_device_destroy(fb_class, MKDEV(FB_MAJOR, i));
|
2005-04-16 16:20:36 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fb_register_client - register a client notifier
|
|
|
|
* @nb: notifier block to callback on events
|
|
|
|
*/
|
|
|
|
int fb_register_client(struct notifier_block *nb)
|
|
|
|
{
|
|
|
|
return notifier_chain_register(&fb_notifier_list, nb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* fb_unregister_client - unregister a client notifier
|
|
|
|
* @nb: notifier block to callback on events
|
|
|
|
*/
|
|
|
|
int fb_unregister_client(struct notifier_block *nb)
|
|
|
|
{
|
|
|
|
return notifier_chain_unregister(&fb_notifier_list, nb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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) {
|
|
|
|
notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event);
|
|
|
|
info->state = FBINFO_STATE_SUSPENDED;
|
|
|
|
} else {
|
|
|
|
info->state = FBINFO_STATE_RUNNING;
|
|
|
|
notifier_call_chain(&fb_notifier_list, 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);
|
|
|
|
|
|
|
|
devfs_mk_dir("fb");
|
|
|
|
if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
|
|
|
|
printk("unable to get major %d for fb devs\n", FB_MAJOR);
|
|
|
|
|
2005-03-23 11:01:41 -07:00
|
|
|
fb_class = class_create(THIS_MODULE, "graphics");
|
2005-04-16 16:20:36 -06:00
|
|
|
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)
|
|
|
|
{
|
2005-03-23 11:01:41 -07:00
|
|
|
class_destroy(fb_class);
|
2005-07-27 12:46:04 -06:00
|
|
|
unregister_chrdev(FB_MAJOR, "fb");
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
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 = notifier_call_chain(&fb_notifier_list,
|
|
|
|
FB_EVENT_NEW_MODELIST,
|
|
|
|
&event);
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static char *video_options[FB_MAX];
|
|
|
|
static int ofonly;
|
|
|
|
|
2005-05-01 09:59:25 -06:00
|
|
|
extern const char *global_mode_option;
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/**
|
|
|
|
* 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;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
*/
|
2005-05-05 17:16:09 -06:00
|
|
|
static int __init video_setup(char *options)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
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 0;
|
|
|
|
}
|
|
|
|
__setup("video=", video_setup);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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_register_client);
|
|
|
|
EXPORT_SYMBOL(fb_unregister_client);
|
|
|
|
EXPORT_SYMBOL(fb_get_options);
|
|
|
|
EXPORT_SYMBOL(fb_new_modelist);
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|