Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1371 insertions, 0 deletions

diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
new file mode 100644
index 0000000..25f460c
--- /dev/null
+++ b/drivers/video/fbmem.c
@@ -0,0 +1,1371 @@
+/*
+ *  linux/drivers/video/fbmem.c
+ *
+ *  Copyright (C) 1994 Martin Schaller
+ *
+ *	2001 - Documented with DocBook
+ *	- Brad Douglas <brad@neruo.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/kernel.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+#include <linux/linux_logo.h>
+#include <linux/proc_fs.h>
+#include <linux/console.h>
+#ifdef CONFIG_KMOD
+#include <linux/kmod.h>
+#endif
+#include <linux/devfs_fs_kernel.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/efi.h>
+
+#if defined(__mc68000__) || defined(CONFIG_APUS)
+#include <asm/setup.h>
+#endif
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+#include <linux/fb.h>
+
+    /*
+     *  Frame buffer device initialization and setup routines
+     */
+
+#define FBPIXMAPSIZE	(1024 * 8)
+
+static struct notifier_block *fb_notifier_list;
+struct fb_info *registered_fb[FB_MAX];
+int num_registered_fb;
+
+/*
+ * Helpers
+ */
+
+int fb_get_color_depth(struct fb_var_screeninfo *var)
+{
+	if (var->green.length == var->blue.length &&
+	    var->green.length == var->red.length &&
+	    !var->green.offset && !var->blue.offset &&
+	    !var->red.offset)
+		return var->green.length;
+	else
+		return (var->green.length + var->red.length +
+			var->blue.length);
+}
+EXPORT_SYMBOL(fb_get_color_depth);
+
+/*
+ * Drawing helpers.
+ */
+void fb_iomove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
+			   u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
+			   u32 height)
+{
+	int i;
+
+	for (i = height; i--; ) {
+		buf->outbuf(info, dst, src, s_pitch);
+		src += s_pitch;
+		dst += d_pitch;
+	}
+}
+
+void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
+			    u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
+			    u32 height)
+{
+	int i, j;
+
+	for (i = height; i--; ) {
+		for (j = 0; j < s_pitch; j++)
+			dst[j] = src[j];
+		src += s_pitch;
+		dst += d_pitch;
+	}
+}
+
+void fb_iomove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
+			     u8 *dst, u32 d_pitch, u8 *src, u32 idx,
+			     u32 height, u32 shift_high, u32 shift_low,
+			     u32 mod)
+{
+	u8 mask = (u8) (0xfff << shift_high), tmp;
+	int i, j;
+
+	for (i = height; i--; ) {
+		for (j = 0; j < idx; j++) {
+			tmp = buf->inbuf(info, dst+j);
+			tmp &= mask;
+			tmp |= *src >> shift_low;
+			buf->outbuf(info, dst+j, &tmp, 1);
+			tmp = *src << shift_high;
+			buf->outbuf(info, dst+j+1, &tmp, 1);
+			src++;
+		}
+		tmp = buf->inbuf(info, dst+idx);
+		tmp &= mask;
+		tmp |= *src >> shift_low;
+		buf->outbuf(info, dst+idx, &tmp, 1);
+		if (shift_high < mod) {
+			tmp = *src << shift_high;
+			buf->outbuf(info, dst+idx+1, &tmp, 1);
+		}	
+		src++;
+		dst += d_pitch;
+	}
+}
+
+void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
+			      u8 *dst, u32 d_pitch, u8 *src, u32 idx,
+			      u32 height, u32 shift_high, u32 shift_low,
+			      u32 mod)
+{
+	u8 mask = (u8) (0xfff << shift_high), tmp;
+	int i, j;
+
+	for (i = height; i--; ) {
+		for (j = 0; j < idx; j++) {
+			tmp = dst[j];
+			tmp &= mask;
+			tmp |= *src >> shift_low;
+			dst[j] = tmp;
+			tmp = *src << shift_high;
+			dst[j+1] = tmp;
+			src++;
+		}
+		tmp = dst[idx];
+		tmp &= mask;
+		tmp |= *src >> shift_low;
+		dst[idx] = tmp;
+		if (shift_high < mod) {
+			tmp = *src << shift_high;
+			dst[idx+1] = tmp;
+		}
+		src++;
+		dst += d_pitch;
+	}
+}
+
+/*
+ * we need to lock this section since fb_cursor
+ * may use fb_imageblit()
+ */
+char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
+{
+	u32 align = buf->buf_align - 1, offset;
+	char *addr = buf->addr;
+
+	/* If IO mapped, we need to sync before access, no sharing of
+	 * the pixmap is done
+	 */
+	if (buf->flags & FB_PIXMAP_IO) {
+		if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
+			info->fbops->fb_sync(info);
+		return addr;
+	}
+
+	/* See if we fit in the remaining pixmap space */
+	offset = buf->offset + align;
+	offset &= ~align;
+	if (offset + size > buf->size) {
+		/* We do not fit. In order to be able to re-use the buffer,
+		 * we must ensure no asynchronous DMA'ing or whatever operation
+		 * is in progress, we sync for that.
+		 */
+		if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
+			info->fbops->fb_sync(info);
+		offset = 0;
+	}
+	buf->offset = offset + size;
+	addr += offset;
+
+	return addr;
+}
+
+#ifdef CONFIG_LOGO
+#include <linux/linux_logo.h>
+
+static inline unsigned safe_shift(unsigned d, int n)
+{
+	return n < 0 ? d >> -n : d << n;
+}
+
+static void fb_set_logocmap(struct fb_info *info,
+				   const struct linux_logo *logo)
+{
+	struct fb_cmap palette_cmap;
+	u16 palette_green[16];
+	u16 palette_blue[16];
+	u16 palette_red[16];
+	int i, j, n;
+	const unsigned char *clut = logo->clut;
+
+	palette_cmap.start = 0;
+	palette_cmap.len = 16;
+	palette_cmap.red = palette_red;
+	palette_cmap.green = palette_green;
+	palette_cmap.blue = palette_blue;
+	palette_cmap.transp = NULL;
+
+	for (i = 0; i < logo->clutsize; i += n) {
+		n = logo->clutsize - i;
+		/* palette_cmap provides space for only 16 colors at once */
+		if (n > 16)
+			n = 16;
+		palette_cmap.start = 32 + i;
+		palette_cmap.len = n;
+		for (j = 0; j < n; ++j) {
+			palette_cmap.red[j] = clut[0] << 8 | clut[0];
+			palette_cmap.green[j] = clut[1] << 8 | clut[1];
+			palette_cmap.blue[j] = clut[2] << 8 | clut[2];
+			clut += 3;
+		}
+		fb_set_cmap(&palette_cmap, info);
+	}
+}
+
+static void  fb_set_logo_truepalette(struct fb_info *info,
+					    const struct linux_logo *logo,
+					    u32 *palette)
+{
+	unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
+	unsigned char redmask, greenmask, bluemask;
+	int redshift, greenshift, blueshift;
+	int i;
+	const unsigned char *clut = logo->clut;
+
+	/*
+	 * We have to create a temporary palette since console palette is only
+	 * 16 colors long.
+	 */
+	/* Bug: Doesn't obey msb_right ... (who needs that?) */
+	redmask   = mask[info->var.red.length   < 8 ? info->var.red.length   : 8];
+	greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
+	bluemask  = mask[info->var.blue.length  < 8 ? info->var.blue.length  : 8];
+	redshift   = info->var.red.offset   - (8 - info->var.red.length);
+	greenshift = info->var.green.offset - (8 - info->var.green.length);
+	blueshift  = info->var.blue.offset  - (8 - info->var.blue.length);
+
+	for ( i = 0; i < logo->clutsize; i++) {
+		palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
+				 safe_shift((clut[1] & greenmask), greenshift) |
+				 safe_shift((clut[2] & bluemask), blueshift));
+		clut += 3;
+	}
+}
+
+static void fb_set_logo_directpalette(struct fb_info *info,
+					     const struct linux_logo *logo,
+					     u32 *palette)
+{
+	int redshift, greenshift, blueshift;
+	int i;
+
+	redshift = info->var.red.offset;
+	greenshift = info->var.green.offset;
+	blueshift = info->var.blue.offset;
+
+	for (i = 32; i < logo->clutsize; i++)
+		palette[i] = i << redshift | i << greenshift | i << blueshift;
+}
+
+static void fb_set_logo(struct fb_info *info,
+			       const struct linux_logo *logo, u8 *dst,
+			       int depth)
+{
+	int i, j, k, fg = 1;
+	const u8 *src = logo->data;
+	u8 d, xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
+
+	if (fb_get_color_depth(&info->var) == 3)
+		fg = 7;
+
+	switch (depth) {
+	case 4:
+		for (i = 0; i < logo->height; i++)
+			for (j = 0; j < logo->width; src++) {
+				*dst++ = *src >> 4;
+				j++;
+				if (j < logo->width) {
+					*dst++ = *src & 0x0f;
+					j++;
+				}
+			}
+		break;
+	case 1:
+		for (i = 0; i < logo->height; i++) {
+			for (j = 0; j < logo->width; src++) {
+				d = *src ^ xor;
+				for (k = 7; k >= 0; k--) {
+					*dst++ = ((d >> k) & 1) ? fg : 0;
+					j++;
+				}
+			}
+		}
+		break;
+	}
+}
+
+/*
+ * Three (3) kinds of logo maps exist.  linux_logo_clut224 (>16 colors),
+ * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors).  Depending on
+ * the visual format and color depth of the framebuffer, the DAC, the
+ * pseudo_palette, and the logo data will be adjusted accordingly.
+ *
+ * Case 1 - linux_logo_clut224:
+ * Color exceeds the number of console colors (16), thus we set the hardware DAC
+ * using fb_set_cmap() appropriately.  The "needs_cmapreset"  flag will be set.
+ *
+ * For visuals that require color info from the pseudo_palette, we also construct
+ * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
+ * will be set.
+ *
+ * Case 2 - linux_logo_vga16:
+ * The number of colors just matches the console colors, thus there is no need
+ * to set the DAC or the pseudo_palette.  However, the bitmap is packed, ie,
+ * each byte contains color information for two pixels (upper and lower nibble).
+ * To be consistent with fb_imageblit() usage, we therefore separate the two
+ * nibbles into separate bytes. The "depth" flag will be set to 4.
+ *
+ * Case 3 - linux_logo_mono:
+ * This is similar with Case 2.  Each byte contains information for 8 pixels.
+ * We isolate each bit and expand each into a byte. The "depth" flag will
+ * be set to 1.
+ */
+static struct logo_data {
+	int depth;
+	int needs_directpalette;
+	int needs_truepalette;
+	int needs_cmapreset;
+	const struct linux_logo *logo;
+} fb_logo;
+
+int fb_prepare_logo(struct fb_info *info)
+{
+	int depth = fb_get_color_depth(&info->var);
+
+	memset(&fb_logo, 0, sizeof(struct logo_data));
+
+	if (info->flags & FBINFO_MISC_TILEBLITTING)
+		return 0;
+
+	if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
+		depth = info->var.blue.length;
+		if (info->var.red.length < depth)
+			depth = info->var.red.length;
+		if (info->var.green.length < depth)
+			depth = info->var.green.length;
+	}
+
+	if (depth >= 8) {
+		switch (info->fix.visual) {
+		case FB_VISUAL_TRUECOLOR:
+			fb_logo.needs_truepalette = 1;
+			break;
+		case FB_VISUAL_DIRECTCOLOR:
+			fb_logo.needs_directpalette = 1;
+			fb_logo.needs_cmapreset = 1;
+			break;
+		case FB_VISUAL_PSEUDOCOLOR:
+			fb_logo.needs_cmapreset = 1;
+			break;
+		}
+	}
+
+	/* Return if no suitable logo was found */
+	fb_logo.logo = fb_find_logo(depth);
+	
+	if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
+		fb_logo.logo = NULL;
+		return 0;
+	}
+	/* What depth we asked for might be different from what we get */
+	if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
+		fb_logo.depth = 8;
+	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 < &registered_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 = &blank;
+		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
+};
+
+static struct class_simple *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;
+
+	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->class_device = class_simple_device_add(fb_class, MKDEV(FB_MAJOR, i),
+				    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;
+			fb_info->pixmap.access_align = 4;
+			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);
+	class_simple_device_remove(MKDEV(FB_MAJOR, i));
+	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);
+
+	fb_class = class_simple_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_simple_destroy(fb_class);
+}
+
+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;
+
+/**
+ * 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;
+}
+
+
+extern const char *global_mode_option;
+
+/**
+ *	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.
+ *
+ */
+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 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_iomove_buf_unaligned);
+EXPORT_SYMBOL(fb_iomove_buf_aligned);
+EXPORT_SYMBOL(fb_sysmove_buf_unaligned);
+EXPORT_SYMBOL(fb_sysmove_buf_aligned);
+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");