Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3438 insertions, 0 deletions

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
new file mode 100644
index 000000000..fa205be94
--- /dev/null
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -0,0 +1,3438 @@
+/*
+ *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
+ *
+ *	Copyright (C) 1995 Geert Uytterhoeven
+ *
+ *
+ *  This file is based on the original Amiga console driver (amicon.c):
+ *
+ *	Copyright (C) 1993 Hamish Macdonald
+ *			   Greg Harp
+ *	Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
+ *
+ *	      with work by William Rucklidge (wjr@cs.cornell.edu)
+ *			   Geert Uytterhoeven
+ *			   Jes Sorensen (jds@kom.auc.dk)
+ *			   Martin Apel
+ *
+ *  and on the original Atari console driver (atacon.c):
+ *
+ *	Copyright (C) 1993 Bjoern Brauel
+ *			   Roman Hodek
+ *
+ *	      with work by Guenther Kelleter
+ *			   Martin Schaller
+ *			   Andreas Schwab
+ *
+ *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
+ *  Smart redraw scrolling, arbitrary font width support, 512char font support
+ *  and software scrollback added by 
+ *                         Jakub Jelinek (jj@ultra.linux.cz)
+ *
+ *  Random hacking by Martin Mares <mj@ucw.cz>
+ *
+ *	2001 - Documented with DocBook
+ *	- Brad Douglas <brad@neruo.com>
+ *
+ *  The low level operations for the various display memory organizations are
+ *  now in separate source files.
+ *
+ *  Currently the following organizations are supported:
+ *
+ *    o afb			Amiga bitplanes
+ *    o cfb{2,4,8,16,24,32}	Packed pixels
+ *    o ilbm			Amiga interleaved bitplanes
+ *    o iplan2p[248]		Atari interleaved bitplanes
+ *    o mfb			Monochrome
+ *    o vga			VGA characters/attributes
+ *
+ *  To do:
+ *
+ *    - Implement 16 plane mode (iplan2p16)
+ *
+ *
+ *  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/module.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>	/* MSch: for IRQ probe */
+#include <linux/console.h>
+#include <linux/string.h>
+#include <linux/kd.h>
+#include <linux/slab.h>
+#include <linux/fb.h>
+#include <linux/fbcon.h>
+#include <linux/vt_kern.h>
+#include <linux/selection.h>
+#include <linux/font.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/crc32.h> /* For counting font checksums */
+#include <linux/uaccess.h>
+#include <asm/fb.h>
+#include <asm/irq.h>
+
+#include "fbcon.h"
+
+/*
+ * FIXME: Locking
+ *
+ * - fbcon state itself is protected by the console_lock, and the code does a
+ *   pretty good job at making sure that lock is held everywhere it's needed.
+ *
+ * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
+ *   means concurrent access to the same fbdev from both fbcon and userspace
+ *   will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
+ *   of fb_lock/unlock protected sections, since otherwise we'll recurse and
+ *   deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
+ *   fbmem.c cannot use locking asserts, and there's lots of callers which get
+ *   the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
+ */
+
+enum {
+	FBCON_LOGO_CANSHOW	= -1,	/* the logo can be shown */
+	FBCON_LOGO_DRAW		= -2,	/* draw the logo to a console */
+	FBCON_LOGO_DONTSHOW	= -3	/* do not show the logo */
+};
+
+static struct fbcon_display fb_display[MAX_NR_CONSOLES];
+
+struct fb_info *fbcon_registered_fb[FB_MAX];
+int fbcon_num_registered_fb;
+
+#define fbcon_for_each_registered_fb(i)		\
+	for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++)		\
+		if (!fbcon_registered_fb[i]) {} else
+
+static signed char con2fb_map[MAX_NR_CONSOLES];
+static signed char con2fb_map_boot[MAX_NR_CONSOLES];
+
+static struct fb_info *fbcon_info_from_console(int console)
+{
+	WARN_CONSOLE_UNLOCKED();
+
+	return fbcon_registered_fb[con2fb_map[console]];
+}
+
+static int logo_lines;
+/* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
+   enums.  */
+static int logo_shown = FBCON_LOGO_CANSHOW;
+/* console mappings */
+static unsigned int first_fb_vc;
+static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1;
+static int fbcon_is_default = 1; 
+static int primary_device = -1;
+static int fbcon_has_console_bind;
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
+static int map_override;
+
+static inline void fbcon_map_override(void)
+{
+	map_override = 1;
+}
+#else
+static inline void fbcon_map_override(void)
+{
+}
+#endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
+static bool deferred_takeover = true;
+#else
+#define deferred_takeover false
+#endif
+
+/* font data */
+static char fontname[40];
+
+/* current fb_info */
+static int info_idx = -1;
+
+/* console rotation */
+static int initial_rotation = -1;
+static int fbcon_has_sysfs;
+static int margin_color;
+
+static const struct consw fb_con;
+
+#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
+
+static int fbcon_cursor_noblink;
+
+#define divides(a, b)	((!(a) || (b)%(a)) ? 0 : 1)
+
+/*
+ *  Interface used by the world
+ */
+
+static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
+static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
+
+/*
+ *  Internal routines
+ */
+static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
+			   int unit);
+static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
+			      int line, int count, int dy);
+static void fbcon_modechanged(struct fb_info *info);
+static void fbcon_set_all_vcs(struct fb_info *info);
+
+static struct device *fbcon_device;
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
+static inline void fbcon_set_rotation(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
+	    ops->p->con_rotate < 4)
+		ops->rotate = ops->p->con_rotate;
+	else
+		ops->rotate = 0;
+}
+
+static void fbcon_rotate(struct fb_info *info, u32 rotate)
+{
+	struct fbcon_ops *ops= info->fbcon_par;
+	struct fb_info *fb_info;
+
+	if (!ops || ops->currcon == -1)
+		return;
+
+	fb_info = fbcon_info_from_console(ops->currcon);
+
+	if (info == fb_info) {
+		struct fbcon_display *p = &fb_display[ops->currcon];
+
+		if (rotate < 4)
+			p->con_rotate = rotate;
+		else
+			p->con_rotate = 0;
+
+		fbcon_modechanged(info);
+	}
+}
+
+static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct vc_data *vc;
+	struct fbcon_display *p;
+	int i;
+
+	if (!ops || ops->currcon < 0 || rotate > 3)
+		return;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		vc = vc_cons[i].d;
+		if (!vc || vc->vc_mode != KD_TEXT ||
+		    fbcon_info_from_console(i) != info)
+			continue;
+
+		p = &fb_display[vc->vc_num];
+		p->con_rotate = rotate;
+	}
+
+	fbcon_set_all_vcs(info);
+}
+#else
+static inline void fbcon_set_rotation(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	ops->rotate = FB_ROTATE_UR;
+}
+
+static void fbcon_rotate(struct fb_info *info, u32 rotate)
+{
+	return;
+}
+
+static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
+{
+	return;
+}
+#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
+
+static int fbcon_get_rotate(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	return (ops) ? ops->rotate : 0;
+}
+
+static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	return (info->state != FBINFO_STATE_RUNNING ||
+		vc->vc_mode != KD_TEXT || ops->graphics);
+}
+
+static int get_color(struct vc_data *vc, struct fb_info *info,
+	      u16 c, int is_fg)
+{
+	int depth = fb_get_color_depth(&info->var, &info->fix);
+	int color = 0;
+
+	if (console_blanked) {
+		unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
+
+		c = vc->vc_video_erase_char & charmask;
+	}
+
+	if (depth != 1)
+		color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
+			: attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
+
+	switch (depth) {
+	case 1:
+	{
+		int col = mono_col(info);
+		/* 0 or 1 */
+		int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
+		int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
+
+		if (console_blanked)
+			fg = bg;
+
+		color = (is_fg) ? fg : bg;
+		break;
+	}
+	case 2:
+		/*
+		 * Scale down 16-colors to 4 colors. Default 4-color palette
+		 * is grayscale. However, simply dividing the values by 4
+		 * will not work, as colors 1, 2 and 3 will be scaled-down
+		 * to zero rendering them invisible.  So empirically convert
+		 * colors to a sane 4-level grayscale.
+		 */
+		switch (color) {
+		case 0:
+			color = 0; /* black */
+			break;
+		case 1 ... 6:
+			color = 2; /* white */
+			break;
+		case 7 ... 8:
+			color = 1; /* gray */
+			break;
+		default:
+			color = 3; /* intense white */
+			break;
+		}
+		break;
+	case 3:
+		/*
+		 * Last 8 entries of default 16-color palette is a more intense
+		 * version of the first 8 (i.e., same chrominance, different
+		 * luminance).
+		 */
+		color &= 7;
+		break;
+	}
+
+
+	return color;
+}
+
+static void fb_flashcursor(struct work_struct *work)
+{
+	struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work);
+	struct fb_info *info;
+	struct vc_data *vc = NULL;
+	int c;
+	int mode;
+	int ret;
+
+	/* FIXME: we should sort out the unbind locking instead */
+	/* instead we just fail to flash the cursor if we can't get
+	 * the lock instead of blocking fbcon deinit */
+	ret = console_trylock();
+	if (ret == 0)
+		return;
+
+	/* protected by console_lock */
+	info = ops->info;
+
+	if (ops->currcon != -1)
+		vc = vc_cons[ops->currcon].d;
+
+	if (!vc || !con_is_visible(vc) ||
+	    fbcon_info_from_console(vc->vc_num) != info ||
+	    vc->vc_deccm != 1) {
+		console_unlock();
+		return;
+	}
+
+	c = scr_readw((u16 *) vc->vc_pos);
+	mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
+		CM_ERASE : CM_DRAW;
+	ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
+		    get_color(vc, info, c, 0));
+	console_unlock();
+
+	queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
+			   ops->cur_blink_jiffies);
+}
+
+static void fbcon_add_cursor_work(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (!fbcon_cursor_noblink)
+		queue_delayed_work(system_power_efficient_wq, &ops->cursor_work,
+				   ops->cur_blink_jiffies);
+}
+
+static void fbcon_del_cursor_work(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	cancel_delayed_work_sync(&ops->cursor_work);
+}
+
+#ifndef MODULE
+static int __init fb_console_setup(char *this_opt)
+{
+	char *options;
+	int i, j;
+
+	if (!this_opt || !*this_opt)
+		return 1;
+
+	while ((options = strsep(&this_opt, ",")) != NULL) {
+		if (!strncmp(options, "font:", 5)) {
+			strscpy(fontname, options + 5, sizeof(fontname));
+			continue;
+		}
+		
+		if (!strncmp(options, "scrollback:", 11)) {
+			pr_warn("Ignoring scrollback size option\n");
+			continue;
+		}
+		
+		if (!strncmp(options, "map:", 4)) {
+			options += 4;
+			if (*options) {
+				for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
+					if (!options[j])
+						j = 0;
+					con2fb_map_boot[i] =
+						(options[j++]-'0') % FB_MAX;
+				}
+
+				fbcon_map_override();
+			}
+			continue;
+		}
+
+		if (!strncmp(options, "vc:", 3)) {
+			options += 3;
+			if (*options)
+				first_fb_vc = simple_strtoul(options, &options, 10) - 1;
+			if (first_fb_vc >= MAX_NR_CONSOLES)
+				first_fb_vc = 0;
+			if (*options++ == '-')
+				last_fb_vc = simple_strtoul(options, &options, 10) - 1;
+			if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES)
+				last_fb_vc = MAX_NR_CONSOLES - 1;
+			fbcon_is_default = 0; 
+			continue;
+		}
+
+		if (!strncmp(options, "rotate:", 7)) {
+			options += 7;
+			if (*options)
+				initial_rotation = simple_strtoul(options, &options, 0);
+			if (initial_rotation > 3)
+				initial_rotation = 0;
+			continue;
+		}
+
+		if (!strncmp(options, "margin:", 7)) {
+			options += 7;
+			if (*options)
+				margin_color = simple_strtoul(options, &options, 0);
+			continue;
+		}
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
+		if (!strcmp(options, "nodefer")) {
+			deferred_takeover = false;
+			continue;
+		}
+#endif
+
+		if (!strncmp(options, "logo-pos:", 9)) {
+			options += 9;
+			if (!strcmp(options, "center"))
+				fb_center_logo = true;
+			continue;
+		}
+
+		if (!strncmp(options, "logo-count:", 11)) {
+			options += 11;
+			if (*options)
+				fb_logo_count = simple_strtol(options, &options, 0);
+			continue;
+		}
+	}
+	return 1;
+}
+
+__setup("fbcon=", fb_console_setup);
+#endif
+
+static int search_fb_in_map(int idx)
+{
+	int i, retval = 0;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		if (con2fb_map[i] == idx)
+			retval = 1;
+	}
+	return retval;
+}
+
+static int search_for_mapped_con(void)
+{
+	int i, retval = 0;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		if (con2fb_map[i] != -1)
+			retval = 1;
+	}
+	return retval;
+}
+
+static int do_fbcon_takeover(int show_logo)
+{
+	int err, i;
+
+	if (!fbcon_num_registered_fb)
+		return -ENODEV;
+
+	if (!show_logo)
+		logo_shown = FBCON_LOGO_DONTSHOW;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++)
+		con2fb_map[i] = info_idx;
+
+	err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
+				fbcon_is_default);
+
+	if (err) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++)
+			con2fb_map[i] = -1;
+		info_idx = -1;
+	} else {
+		fbcon_has_console_bind = 1;
+	}
+
+	return err;
+}
+
+#ifdef MODULE
+static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
+			       int cols, int rows, int new_cols, int new_rows)
+{
+	logo_shown = FBCON_LOGO_DONTSHOW;
+}
+#else
+static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
+			       int cols, int rows, int new_cols, int new_rows)
+{
+	/* Need to make room for the logo */
+	struct fbcon_ops *ops = info->fbcon_par;
+	int cnt, erase = vc->vc_video_erase_char, step;
+	unsigned short *save = NULL, *r, *q;
+	int logo_height;
+
+	if (info->fbops->owner) {
+		logo_shown = FBCON_LOGO_DONTSHOW;
+		return;
+	}
+
+	/*
+	 * remove underline attribute from erase character
+	 * if black and white framebuffer.
+	 */
+	if (fb_get_color_depth(&info->var, &info->fix) == 1)
+		erase &= ~0x400;
+	logo_height = fb_prepare_logo(info, ops->rotate);
+	logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
+	q = (unsigned short *) (vc->vc_origin +
+				vc->vc_size_row * rows);
+	step = logo_lines * cols;
+	for (r = q - logo_lines * cols; r < q; r++)
+		if (scr_readw(r) != vc->vc_video_erase_char)
+			break;
+	if (r != q && new_rows >= rows + logo_lines) {
+		save = kzalloc(array3_size(logo_lines, new_cols, 2),
+			       GFP_KERNEL);
+		if (save) {
+			int i = min(cols, new_cols);
+			scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
+			r = q - step;
+			for (cnt = 0; cnt < logo_lines; cnt++, r += i)
+				scr_memcpyw(save + cnt * new_cols, r, 2 * i);
+			r = q;
+		}
+	}
+	if (r == q) {
+		/* We can scroll screen down */
+		r = q - step - cols;
+		for (cnt = rows - logo_lines; cnt > 0; cnt--) {
+			scr_memcpyw(r + step, r, vc->vc_size_row);
+			r -= cols;
+		}
+		if (!save) {
+			int lines;
+			if (vc->state.y + logo_lines >= rows)
+				lines = rows - vc->state.y - 1;
+			else
+				lines = logo_lines;
+			vc->state.y += lines;
+			vc->vc_pos += lines * vc->vc_size_row;
+		}
+	}
+	scr_memsetw((unsigned short *) vc->vc_origin,
+		    erase,
+		    vc->vc_size_row * logo_lines);
+
+	if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
+		fbcon_clear_margins(vc, 0);
+		update_screen(vc);
+	}
+
+	if (save) {
+		q = (unsigned short *) (vc->vc_origin +
+					vc->vc_size_row *
+					rows);
+		scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
+		vc->state.y += logo_lines;
+		vc->vc_pos += logo_lines * vc->vc_size_row;
+		kfree(save);
+	}
+
+	if (logo_shown == FBCON_LOGO_DONTSHOW)
+		return;
+
+	if (logo_lines > vc->vc_bottom) {
+		logo_shown = FBCON_LOGO_CANSHOW;
+		printk(KERN_INFO
+		       "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
+	} else {
+		logo_shown = FBCON_LOGO_DRAW;
+		vc->vc_top = logo_lines;
+	}
+}
+#endif /* MODULE */
+
+#ifdef CONFIG_FB_TILEBLITTING
+static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	ops->p = &fb_display[vc->vc_num];
+
+	if ((info->flags & FBINFO_MISC_TILEBLITTING))
+		fbcon_set_tileops(vc, info);
+	else {
+		fbcon_set_rotation(info);
+		fbcon_set_bitops(ops);
+	}
+}
+
+static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
+{
+	int err = 0;
+
+	if (info->flags & FBINFO_MISC_TILEBLITTING &&
+	    info->tileops->fb_get_tilemax(info) < charcount)
+		err = 1;
+
+	return err;
+}
+#else
+static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	info->flags &= ~FBINFO_MISC_TILEBLITTING;
+	ops->p = &fb_display[vc->vc_num];
+	fbcon_set_rotation(info);
+	fbcon_set_bitops(ops);
+}
+
+static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
+{
+	return 0;
+}
+
+#endif /* CONFIG_MISC_TILEBLITTING */
+
+static void fbcon_release(struct fb_info *info)
+{
+	lock_fb_info(info);
+	if (info->fbops->fb_release)
+		info->fbops->fb_release(info, 0);
+	unlock_fb_info(info);
+
+	module_put(info->fbops->owner);
+
+	if (info->fbcon_par) {
+		struct fbcon_ops *ops = info->fbcon_par;
+
+		fbcon_del_cursor_work(info);
+		kfree(ops->cursor_state.mask);
+		kfree(ops->cursor_data);
+		kfree(ops->cursor_src);
+		kfree(ops->fontbuffer);
+		kfree(info->fbcon_par);
+		info->fbcon_par = NULL;
+	}
+}
+
+static int fbcon_open(struct fb_info *info)
+{
+	struct fbcon_ops *ops;
+
+	if (!try_module_get(info->fbops->owner))
+		return -ENODEV;
+
+	lock_fb_info(info);
+	if (info->fbops->fb_open &&
+	    info->fbops->fb_open(info, 0)) {
+		unlock_fb_info(info);
+		module_put(info->fbops->owner);
+		return -ENODEV;
+	}
+	unlock_fb_info(info);
+
+	ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
+	if (!ops) {
+		fbcon_release(info);
+		return -ENOMEM;
+	}
+
+	INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor);
+	ops->info = info;
+	info->fbcon_par = ops;
+	ops->cur_blink_jiffies = HZ / 5;
+
+	return 0;
+}
+
+static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
+				  int unit)
+{
+	int err;
+
+	err = fbcon_open(info);
+	if (err)
+		return err;
+
+	if (vc)
+		set_blitting_type(vc, info);
+
+	return err;
+}
+
+static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
+				   struct fb_info *newinfo)
+{
+	int ret;
+
+	fbcon_release(oldinfo);
+
+	/*
+	  If oldinfo and newinfo are driving the same hardware,
+	  the fb_release() method of oldinfo may attempt to
+	  restore the hardware state.  This will leave the
+	  newinfo in an undefined state. Thus, a call to
+	  fb_set_par() may be needed for the newinfo.
+	*/
+	if (newinfo && newinfo->fbops->fb_set_par) {
+		ret = newinfo->fbops->fb_set_par(newinfo);
+
+		if (ret)
+			printk(KERN_ERR "con2fb_release_oldinfo: "
+				"detected unhandled fb_set_par error, "
+				"error code %d\n", ret);
+	}
+}
+
+static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
+				int unit, int show_logo)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	int ret;
+
+	ops->currcon = fg_console;
+
+	if (info->fbops->fb_set_par && !ops->initialized) {
+		ret = info->fbops->fb_set_par(info);
+
+		if (ret)
+			printk(KERN_ERR "con2fb_init_display: detected "
+				"unhandled fb_set_par error, "
+				"error code %d\n", ret);
+	}
+
+	ops->initialized = true;
+	ops->graphics = 0;
+	fbcon_set_disp(info, &info->var, unit);
+
+	if (show_logo) {
+		struct vc_data *fg_vc = vc_cons[fg_console].d;
+		struct fb_info *fg_info =
+			fbcon_info_from_console(fg_console);
+
+		fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
+				   fg_vc->vc_rows, fg_vc->vc_cols,
+				   fg_vc->vc_rows);
+	}
+
+	update_screen(vc_cons[fg_console].d);
+}
+
+/**
+ *	set_con2fb_map - map console to frame buffer device
+ *	@unit: virtual console number to map
+ *	@newidx: frame buffer index to map virtual console to
+ *      @user: user request
+ *
+ *	Maps a virtual console @unit to a frame buffer device
+ *	@newidx.
+ *
+ *	This should be called with the console lock held.
+ */
+static int set_con2fb_map(int unit, int newidx, int user)
+{
+	struct vc_data *vc = vc_cons[unit].d;
+	int oldidx = con2fb_map[unit];
+	struct fb_info *info = fbcon_registered_fb[newidx];
+	struct fb_info *oldinfo = NULL;
+	int err = 0, show_logo;
+
+	WARN_CONSOLE_UNLOCKED();
+
+	if (oldidx == newidx)
+		return 0;
+
+	if (!info)
+		return -EINVAL;
+
+	if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
+		info_idx = newidx;
+		return do_fbcon_takeover(0);
+	}
+
+	if (oldidx != -1)
+		oldinfo = fbcon_registered_fb[oldidx];
+
+	if (!search_fb_in_map(newidx)) {
+		err = con2fb_acquire_newinfo(vc, info, unit);
+		if (err)
+			return err;
+
+		fbcon_add_cursor_work(info);
+	}
+
+	con2fb_map[unit] = newidx;
+
+	/*
+	 * If old fb is not mapped to any of the consoles,
+	 * fbcon should release it.
+	 */
+	if (oldinfo && !search_fb_in_map(oldidx))
+		con2fb_release_oldinfo(vc, oldinfo, info);
+
+	show_logo = (fg_console == 0 && !user &&
+			 logo_shown != FBCON_LOGO_DONTSHOW);
+
+	con2fb_map_boot[unit] = newidx;
+	con2fb_init_display(vc, info, unit, show_logo);
+
+	if (!search_fb_in_map(info_idx))
+		info_idx = newidx;
+
+	return err;
+}
+
+/*
+ *  Low Level Operations
+ */
+/* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
+static int var_to_display(struct fbcon_display *disp,
+			  struct fb_var_screeninfo *var,
+			  struct fb_info *info)
+{
+	disp->xres_virtual = var->xres_virtual;
+	disp->yres_virtual = var->yres_virtual;
+	disp->bits_per_pixel = var->bits_per_pixel;
+	disp->grayscale = var->grayscale;
+	disp->nonstd = var->nonstd;
+	disp->accel_flags = var->accel_flags;
+	disp->height = var->height;
+	disp->width = var->width;
+	disp->red = var->red;
+	disp->green = var->green;
+	disp->blue = var->blue;
+	disp->transp = var->transp;
+	disp->rotate = var->rotate;
+	disp->mode = fb_match_mode(var, &info->modelist);
+	if (disp->mode == NULL)
+		/* This should not happen */
+		return -EINVAL;
+	return 0;
+}
+
+static void display_to_var(struct fb_var_screeninfo *var,
+			   struct fbcon_display *disp)
+{
+	fb_videomode_to_var(var, disp->mode);
+	var->xres_virtual = disp->xres_virtual;
+	var->yres_virtual = disp->yres_virtual;
+	var->bits_per_pixel = disp->bits_per_pixel;
+	var->grayscale = disp->grayscale;
+	var->nonstd = disp->nonstd;
+	var->accel_flags = disp->accel_flags;
+	var->height = disp->height;
+	var->width = disp->width;
+	var->red = disp->red;
+	var->green = disp->green;
+	var->blue = disp->blue;
+	var->transp = disp->transp;
+	var->rotate = disp->rotate;
+}
+
+static const char *fbcon_startup(void)
+{
+	const char *display_desc = "frame buffer device";
+	struct fbcon_display *p = &fb_display[fg_console];
+	struct vc_data *vc = vc_cons[fg_console].d;
+	const struct font_desc *font = NULL;
+	struct fb_info *info = NULL;
+	struct fbcon_ops *ops;
+	int rows, cols;
+
+	/*
+	 *  If num_registered_fb is zero, this is a call for the dummy part.
+	 *  The frame buffer devices weren't initialized yet.
+	 */
+	if (!fbcon_num_registered_fb || info_idx == -1)
+		return display_desc;
+	/*
+	 * Instead of blindly using registered_fb[0], we use info_idx, set by
+	 * fbcon_fb_registered();
+	 */
+	info = fbcon_registered_fb[info_idx];
+	if (!info)
+		return NULL;
+	
+	if (fbcon_open(info))
+		return NULL;
+
+	ops = info->fbcon_par;
+	ops->currcon = -1;
+	ops->graphics = 1;
+	ops->cur_rotate = -1;
+
+	p->con_rotate = initial_rotation;
+	if (p->con_rotate == -1)
+		p->con_rotate = info->fbcon_rotate_hint;
+	if (p->con_rotate == -1)
+		p->con_rotate = FB_ROTATE_UR;
+
+	set_blitting_type(vc, info);
+
+	/* Setup default font */
+	if (!p->fontdata) {
+		if (!fontname[0] || !(font = find_font(fontname)))
+			font = get_default_font(info->var.xres,
+						info->var.yres,
+						info->pixmap.blit_x,
+						info->pixmap.blit_y);
+		vc->vc_font.width = font->width;
+		vc->vc_font.height = font->height;
+		vc->vc_font.data = (void *)(p->fontdata = font->data);
+		vc->vc_font.charcount = font->charcount;
+	}
+
+	cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+	rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+	cols /= vc->vc_font.width;
+	rows /= vc->vc_font.height;
+	vc_resize(vc, cols, rows);
+
+	pr_debug("mode:   %s\n", info->fix.id);
+	pr_debug("visual: %d\n", info->fix.visual);
+	pr_debug("res:    %dx%d-%d\n", info->var.xres,
+		 info->var.yres,
+		 info->var.bits_per_pixel);
+
+	fbcon_add_cursor_work(info);
+	return display_desc;
+}
+
+static void fbcon_init(struct vc_data *vc, int init)
+{
+	struct fb_info *info;
+	struct fbcon_ops *ops;
+	struct vc_data **default_mode = vc->vc_display_fg;
+	struct vc_data *svc = *default_mode;
+	struct fbcon_display *t, *p = &fb_display[vc->vc_num];
+	int logo = 1, new_rows, new_cols, rows, cols;
+	int ret;
+
+	if (WARN_ON(info_idx == -1))
+	    return;
+
+	if (con2fb_map[vc->vc_num] == -1)
+		con2fb_map[vc->vc_num] = info_idx;
+
+	info = fbcon_info_from_console(vc->vc_num);
+
+	if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
+		logo_shown = FBCON_LOGO_DONTSHOW;
+
+	if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
+	    (info->fix.type == FB_TYPE_TEXT))
+		logo = 0;
+
+	if (var_to_display(p, &info->var, info))
+		return;
+
+	if (!info->fbcon_par)
+		con2fb_acquire_newinfo(vc, info, vc->vc_num);
+
+	/* If we are not the first console on this
+	   fb, copy the font from that console */
+	t = &fb_display[fg_console];
+	if (!p->fontdata) {
+		if (t->fontdata) {
+			struct vc_data *fvc = vc_cons[fg_console].d;
+
+			vc->vc_font.data = (void *)(p->fontdata =
+						    fvc->vc_font.data);
+			vc->vc_font.width = fvc->vc_font.width;
+			vc->vc_font.height = fvc->vc_font.height;
+			vc->vc_font.charcount = fvc->vc_font.charcount;
+			p->userfont = t->userfont;
+
+			if (p->userfont)
+				REFCOUNT(p->fontdata)++;
+		} else {
+			const struct font_desc *font = NULL;
+
+			if (!fontname[0] || !(font = find_font(fontname)))
+				font = get_default_font(info->var.xres,
+							info->var.yres,
+							info->pixmap.blit_x,
+							info->pixmap.blit_y);
+			vc->vc_font.width = font->width;
+			vc->vc_font.height = font->height;
+			vc->vc_font.data = (void *)(p->fontdata = font->data);
+			vc->vc_font.charcount = font->charcount;
+		}
+	}
+
+	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
+	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
+	if (vc->vc_font.charcount == 256) {
+		vc->vc_hi_font_mask = 0;
+	} else {
+		vc->vc_hi_font_mask = 0x100;
+		if (vc->vc_can_do_color)
+			vc->vc_complement_mask <<= 1;
+	}
+
+	if (!*svc->uni_pagedict_loc)
+		con_set_default_unimap(svc);
+	if (!*vc->uni_pagedict_loc)
+		con_copy_unimap(vc, svc);
+
+	ops = info->fbcon_par;
+	ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
+
+	p->con_rotate = initial_rotation;
+	if (p->con_rotate == -1)
+		p->con_rotate = info->fbcon_rotate_hint;
+	if (p->con_rotate == -1)
+		p->con_rotate = FB_ROTATE_UR;
+
+	set_blitting_type(vc, info);
+
+	cols = vc->vc_cols;
+	rows = vc->vc_rows;
+	new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+	new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+	new_cols /= vc->vc_font.width;
+	new_rows /= vc->vc_font.height;
+
+	/*
+	 * We must always set the mode. The mode of the previous console
+	 * driver could be in the same resolution but we are using different
+	 * hardware so we have to initialize the hardware.
+	 *
+	 * We need to do it in fbcon_init() to prevent screen corruption.
+	 */
+	if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
+		if (info->fbops->fb_set_par && !ops->initialized) {
+			ret = info->fbops->fb_set_par(info);
+
+			if (ret)
+				printk(KERN_ERR "fbcon_init: detected "
+					"unhandled fb_set_par error, "
+					"error code %d\n", ret);
+		}
+
+		ops->initialized = true;
+	}
+
+	ops->graphics = 0;
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
+	if ((info->flags & FBINFO_HWACCEL_COPYAREA) &&
+	    !(info->flags & FBINFO_HWACCEL_DISABLED))
+		p->scrollmode = SCROLL_MOVE;
+	else /* default to something safe */
+		p->scrollmode = SCROLL_REDRAW;
+#endif
+
+	/*
+	 *  ++guenther: console.c:vc_allocate() relies on initializing
+	 *  vc_{cols,rows}, but we must not set those if we are only
+	 *  resizing the console.
+	 */
+	if (init) {
+		vc->vc_cols = new_cols;
+		vc->vc_rows = new_rows;
+	} else
+		vc_resize(vc, new_cols, new_rows);
+
+	if (logo)
+		fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
+
+	if (ops->rotate_font && ops->rotate_font(info, vc)) {
+		ops->rotate = FB_ROTATE_UR;
+		set_blitting_type(vc, info);
+	}
+
+	ops->p = &fb_display[fg_console];
+}
+
+static void fbcon_free_font(struct fbcon_display *p)
+{
+	if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
+		kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
+	p->fontdata = NULL;
+	p->userfont = 0;
+}
+
+static void set_vc_hi_font(struct vc_data *vc, bool set);
+
+static void fbcon_release_all(void)
+{
+	struct fb_info *info;
+	int i, j, mapped;
+
+	fbcon_for_each_registered_fb(i) {
+		mapped = 0;
+		info = fbcon_registered_fb[i];
+
+		for (j = first_fb_vc; j <= last_fb_vc; j++) {
+			if (con2fb_map[j] == i) {
+				mapped = 1;
+				con2fb_map[j] = -1;
+			}
+		}
+
+		if (mapped)
+			fbcon_release(info);
+	}
+}
+
+static void fbcon_deinit(struct vc_data *vc)
+{
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	struct fb_info *info;
+	struct fbcon_ops *ops;
+	int idx;
+
+	fbcon_free_font(p);
+	idx = con2fb_map[vc->vc_num];
+
+	if (idx == -1)
+		goto finished;
+
+	info = fbcon_registered_fb[idx];
+
+	if (!info)
+		goto finished;
+
+	ops = info->fbcon_par;
+
+	if (!ops)
+		goto finished;
+
+	if (con_is_visible(vc))
+		fbcon_del_cursor_work(info);
+
+	ops->initialized = false;
+finished:
+
+	fbcon_free_font(p);
+	vc->vc_font.data = NULL;
+
+	if (vc->vc_hi_font_mask && vc->vc_screenbuf)
+		set_vc_hi_font(vc, false);
+
+	if (!con_is_bound(&fb_con))
+		fbcon_release_all();
+
+	if (vc->vc_num == logo_shown)
+		logo_shown = FBCON_LOGO_CANSHOW;
+
+	return;
+}
+
+/* ====================================================================== */
+
+/*  fbcon_XXX routines - interface used by the world
+ *
+ *  This system is now divided into two levels because of complications
+ *  caused by hardware scrolling. Top level functions:
+ *
+ *	fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
+ *
+ *  handles y values in range [0, scr_height-1] that correspond to real
+ *  screen positions. y_wrap shift means that first line of bitmap may be
+ *  anywhere on this display. These functions convert lineoffsets to
+ *  bitmap offsets and deal with the wrap-around case by splitting blits.
+ *
+ *	fbcon_bmove_physical_8()    -- These functions fast implementations
+ *	fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
+ *	fbcon_putc_physical_8()	    -- (font width != 8) may be added later
+ *
+ *  WARNING:
+ *
+ *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
+ *  Implies should only really hardware scroll in rows. Only reason for
+ *  restriction is simplicity & efficiency at the moment.
+ */
+
+static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
+			int width)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	u_int y_break;
+
+	if (fbcon_is_inactive(vc, info))
+		return;
+
+	if (!height || !width)
+		return;
+
+	if (sy < vc->vc_top && vc->vc_top == logo_lines) {
+		vc->vc_top = 0;
+		/*
+		 * If the font dimensions are not an integral of the display
+		 * dimensions then the ops->clear below won't end up clearing
+		 * the margins.  Call clear_margins here in case the logo
+		 * bitmap stretched into the margin area.
+		 */
+		fbcon_clear_margins(vc, 0);
+	}
+
+	/* Split blits that cross physical y_wrap boundary */
+
+	y_break = p->vrows - p->yscroll;
+	if (sy < y_break && sy + height - 1 >= y_break) {
+		u_int b = y_break - sy;
+		ops->clear(vc, info, real_y(p, sy), sx, b, width);
+		ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
+				 width);
+	} else
+		ops->clear(vc, info, real_y(p, sy), sx, height, width);
+}
+
+static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
+			int count, int ypos, int xpos)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (!fbcon_is_inactive(vc, info))
+		ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
+			   get_color(vc, info, scr_readw(s), 1),
+			   get_color(vc, info, scr_readw(s), 0));
+}
+
+static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
+{
+	unsigned short chr;
+
+	scr_writew(c, &chr);
+	fbcon_putcs(vc, &chr, 1, ypos, xpos);
+}
+
+static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (!fbcon_is_inactive(vc, info))
+		ops->clear_margins(vc, info, margin_color, bottom_only);
+}
+
+static void fbcon_cursor(struct vc_data *vc, int mode)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+ 	int c = scr_readw((u16 *) vc->vc_pos);
+
+	ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
+
+	if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
+		return;
+
+	if (vc->vc_cursor_type & CUR_SW)
+		fbcon_del_cursor_work(info);
+	else
+		fbcon_add_cursor_work(info);
+
+	ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
+
+	if (!ops->cursor)
+		return;
+
+	ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
+		    get_color(vc, info, c, 0));
+}
+
+static int scrollback_phys_max = 0;
+static int scrollback_max = 0;
+static int scrollback_current = 0;
+
+static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
+			   int unit)
+{
+	struct fbcon_display *p, *t;
+	struct vc_data **default_mode, *vc;
+	struct vc_data *svc;
+	struct fbcon_ops *ops = info->fbcon_par;
+	int rows, cols;
+
+	p = &fb_display[unit];
+
+	if (var_to_display(p, var, info))
+		return;
+
+	vc = vc_cons[unit].d;
+
+	if (!vc)
+		return;
+
+	default_mode = vc->vc_display_fg;
+	svc = *default_mode;
+	t = &fb_display[svc->vc_num];
+
+	if (!vc->vc_font.data) {
+		vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
+		vc->vc_font.width = (*default_mode)->vc_font.width;
+		vc->vc_font.height = (*default_mode)->vc_font.height;
+		vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
+		p->userfont = t->userfont;
+		if (p->userfont)
+			REFCOUNT(p->fontdata)++;
+	}
+
+	var->activate = FB_ACTIVATE_NOW;
+	info->var.activate = var->activate;
+	var->yoffset = info->var.yoffset;
+	var->xoffset = info->var.xoffset;
+	fb_set_var(info, var);
+	ops->var = info->var;
+	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
+	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
+	if (vc->vc_font.charcount == 256) {
+		vc->vc_hi_font_mask = 0;
+	} else {
+		vc->vc_hi_font_mask = 0x100;
+		if (vc->vc_can_do_color)
+			vc->vc_complement_mask <<= 1;
+	}
+
+	if (!*svc->uni_pagedict_loc)
+		con_set_default_unimap(svc);
+	if (!*vc->uni_pagedict_loc)
+		con_copy_unimap(vc, svc);
+
+	cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+	rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+	cols /= vc->vc_font.width;
+	rows /= vc->vc_font.height;
+	vc_resize(vc, cols, rows);
+
+	if (con_is_visible(vc)) {
+		update_screen(vc);
+	}
+}
+
+static __inline__ void ywrap_up(struct vc_data *vc, int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+
+	p->yscroll += count;
+	if (p->yscroll >= p->vrows)	/* Deal with wrap */
+		p->yscroll -= p->vrows;
+	ops->var.xoffset = 0;
+	ops->var.yoffset = p->yscroll * vc->vc_font.height;
+	ops->var.vmode |= FB_VMODE_YWRAP;
+	ops->update_start(info);
+	scrollback_max += count;
+	if (scrollback_max > scrollback_phys_max)
+		scrollback_max = scrollback_phys_max;
+	scrollback_current = 0;
+}
+
+static __inline__ void ywrap_down(struct vc_data *vc, int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+
+	p->yscroll -= count;
+	if (p->yscroll < 0)	/* Deal with wrap */
+		p->yscroll += p->vrows;
+	ops->var.xoffset = 0;
+	ops->var.yoffset = p->yscroll * vc->vc_font.height;
+	ops->var.vmode |= FB_VMODE_YWRAP;
+	ops->update_start(info);
+	scrollback_max -= count;
+	if (scrollback_max < 0)
+		scrollback_max = 0;
+	scrollback_current = 0;
+}
+
+static __inline__ void ypan_up(struct vc_data *vc, int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	p->yscroll += count;
+	if (p->yscroll > p->vrows - vc->vc_rows) {
+		ops->bmove(vc, info, p->vrows - vc->vc_rows,
+			    0, 0, 0, vc->vc_rows, vc->vc_cols);
+		p->yscroll -= p->vrows - vc->vc_rows;
+	}
+
+	ops->var.xoffset = 0;
+	ops->var.yoffset = p->yscroll * vc->vc_font.height;
+	ops->var.vmode &= ~FB_VMODE_YWRAP;
+	ops->update_start(info);
+	fbcon_clear_margins(vc, 1);
+	scrollback_max += count;
+	if (scrollback_max > scrollback_phys_max)
+		scrollback_max = scrollback_phys_max;
+	scrollback_current = 0;
+}
+
+static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+
+	p->yscroll += count;
+
+	if (p->yscroll > p->vrows - vc->vc_rows) {
+		p->yscroll -= p->vrows - vc->vc_rows;
+		fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
+	}
+
+	ops->var.xoffset = 0;
+	ops->var.yoffset = p->yscroll * vc->vc_font.height;
+	ops->var.vmode &= ~FB_VMODE_YWRAP;
+	ops->update_start(info);
+	fbcon_clear_margins(vc, 1);
+	scrollback_max += count;
+	if (scrollback_max > scrollback_phys_max)
+		scrollback_max = scrollback_phys_max;
+	scrollback_current = 0;
+}
+
+static __inline__ void ypan_down(struct vc_data *vc, int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	p->yscroll -= count;
+	if (p->yscroll < 0) {
+		ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
+			    0, vc->vc_rows, vc->vc_cols);
+		p->yscroll += p->vrows - vc->vc_rows;
+	}
+
+	ops->var.xoffset = 0;
+	ops->var.yoffset = p->yscroll * vc->vc_font.height;
+	ops->var.vmode &= ~FB_VMODE_YWRAP;
+	ops->update_start(info);
+	fbcon_clear_margins(vc, 1);
+	scrollback_max -= count;
+	if (scrollback_max < 0)
+		scrollback_max = 0;
+	scrollback_current = 0;
+}
+
+static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+
+	p->yscroll -= count;
+
+	if (p->yscroll < 0) {
+		p->yscroll += p->vrows - vc->vc_rows;
+		fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
+	}
+
+	ops->var.xoffset = 0;
+	ops->var.yoffset = p->yscroll * vc->vc_font.height;
+	ops->var.vmode &= ~FB_VMODE_YWRAP;
+	ops->update_start(info);
+	fbcon_clear_margins(vc, 1);
+	scrollback_max -= count;
+	if (scrollback_max < 0)
+		scrollback_max = 0;
+	scrollback_current = 0;
+}
+
+static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
+			      int line, int count, int dy)
+{
+	unsigned short *s = (unsigned short *)
+		(vc->vc_origin + vc->vc_size_row * line);
+
+	while (count--) {
+		unsigned short *start = s;
+		unsigned short *le = advance_row(s, 1);
+		unsigned short c;
+		int x = 0;
+		unsigned short attr = 1;
+
+		do {
+			c = scr_readw(s);
+			if (attr != (c & 0xff00)) {
+				attr = c & 0xff00;
+				if (s > start) {
+					fbcon_putcs(vc, start, s - start,
+						    dy, x);
+					x += s - start;
+					start = s;
+				}
+			}
+			console_conditional_schedule();
+			s++;
+		} while (s < le);
+		if (s > start)
+			fbcon_putcs(vc, start, s - start, dy, x);
+		console_conditional_schedule();
+		dy++;
+	}
+}
+
+static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
+			struct fbcon_display *p, int line, int count, int ycount)
+{
+	int offset = ycount * vc->vc_cols;
+	unsigned short *d = (unsigned short *)
+	    (vc->vc_origin + vc->vc_size_row * line);
+	unsigned short *s = d + offset;
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	while (count--) {
+		unsigned short *start = s;
+		unsigned short *le = advance_row(s, 1);
+		unsigned short c;
+		int x = 0;
+
+		do {
+			c = scr_readw(s);
+
+			if (c == scr_readw(d)) {
+				if (s > start) {
+					ops->bmove(vc, info, line + ycount, x,
+						   line, x, 1, s-start);
+					x += s - start + 1;
+					start = s + 1;
+				} else {
+					x++;
+					start++;
+				}
+			}
+
+			scr_writew(c, d);
+			console_conditional_schedule();
+			s++;
+			d++;
+		} while (s < le);
+		if (s > start)
+			ops->bmove(vc, info, line + ycount, x, line, x, 1,
+				   s-start);
+		console_conditional_schedule();
+		if (ycount > 0)
+			line++;
+		else {
+			line--;
+			/* NOTE: We subtract two lines from these pointers */
+			s -= vc->vc_size_row;
+			d -= vc->vc_size_row;
+		}
+	}
+}
+
+static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
+			 int line, int count, int offset)
+{
+	unsigned short *d = (unsigned short *)
+	    (vc->vc_origin + vc->vc_size_row * line);
+	unsigned short *s = d + offset;
+
+	while (count--) {
+		unsigned short *start = s;
+		unsigned short *le = advance_row(s, 1);
+		unsigned short c;
+		int x = 0;
+		unsigned short attr = 1;
+
+		do {
+			c = scr_readw(s);
+			if (attr != (c & 0xff00)) {
+				attr = c & 0xff00;
+				if (s > start) {
+					fbcon_putcs(vc, start, s - start,
+						    line, x);
+					x += s - start;
+					start = s;
+				}
+			}
+			if (c == scr_readw(d)) {
+				if (s > start) {
+					fbcon_putcs(vc, start, s - start,
+						     line, x);
+					x += s - start + 1;
+					start = s + 1;
+				} else {
+					x++;
+					start++;
+				}
+			}
+			scr_writew(c, d);
+			console_conditional_schedule();
+			s++;
+			d++;
+		} while (s < le);
+		if (s > start)
+			fbcon_putcs(vc, start, s - start, line, x);
+		console_conditional_schedule();
+		if (offset > 0)
+			line++;
+		else {
+			line--;
+			/* NOTE: We subtract two lines from these pointers */
+			s -= vc->vc_size_row;
+			d -= vc->vc_size_row;
+		}
+	}
+}
+
+static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
+			    int dy, int dx, int height, int width, u_int y_break)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	u_int b;
+
+	if (sy < y_break && sy + height > y_break) {
+		b = y_break - sy;
+		if (dy < sy) {	/* Avoid trashing self */
+			fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
+					y_break);
+			fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
+					height - b, width, y_break);
+		} else {
+			fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
+					height - b, width, y_break);
+			fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
+					y_break);
+		}
+		return;
+	}
+
+	if (dy < y_break && dy + height > y_break) {
+		b = y_break - dy;
+		if (dy < sy) {	/* Avoid trashing self */
+			fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
+					y_break);
+			fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
+					height - b, width, y_break);
+		} else {
+			fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
+					height - b, width, y_break);
+			fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
+					y_break);
+		}
+		return;
+	}
+	ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
+		   height, width);
+}
+
+static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
+			int height, int width)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+
+	if (fbcon_is_inactive(vc, info))
+		return;
+
+	if (!width || !height)
+		return;
+
+	/*  Split blits that cross physical y_wrap case.
+	 *  Pathological case involves 4 blits, better to use recursive
+	 *  code rather than unrolled case
+	 *
+	 *  Recursive invocations don't need to erase the cursor over and
+	 *  over again, so we use fbcon_bmove_rec()
+	 */
+	fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
+			p->vrows - p->yscroll);
+}
+
+static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
+		enum con_scroll dir, unsigned int count)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
+
+	if (fbcon_is_inactive(vc, info))
+		return true;
+
+	fbcon_cursor(vc, CM_ERASE);
+
+	/*
+	 * ++Geert: Only use ywrap/ypan if the console is in text mode
+	 * ++Andrew: Only use ypan on hardware text mode when scrolling the
+	 *           whole screen (prevents flicker).
+	 */
+
+	switch (dir) {
+	case SM_UP:
+		if (count > vc->vc_rows)	/* Maximum realistic size */
+			count = vc->vc_rows;
+		switch (fb_scrollmode(p)) {
+		case SCROLL_MOVE:
+			fbcon_redraw_blit(vc, info, p, t, b - t - count,
+				     count);
+			fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
+			scr_memsetw((unsigned short *) (vc->vc_origin +
+							vc->vc_size_row *
+							(b - count)),
+				    vc->vc_video_erase_char,
+				    vc->vc_size_row * count);
+			return true;
+
+		case SCROLL_WRAP_MOVE:
+			if (b - t - count > 3 * vc->vc_rows >> 2) {
+				if (t > 0)
+					fbcon_bmove(vc, 0, 0, count, 0, t,
+						    vc->vc_cols);
+				ywrap_up(vc, count);
+				if (vc->vc_rows - b > 0)
+					fbcon_bmove(vc, b - count, 0, b, 0,
+						    vc->vc_rows - b,
+						    vc->vc_cols);
+			} else if (info->flags & FBINFO_READS_FAST)
+				fbcon_bmove(vc, t + count, 0, t, 0,
+					    b - t - count, vc->vc_cols);
+			else
+				goto redraw_up;
+			fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
+			break;
+
+		case SCROLL_PAN_REDRAW:
+			if ((p->yscroll + count <=
+			     2 * (p->vrows - vc->vc_rows))
+			    && ((!scroll_partial && (b - t == vc->vc_rows))
+				|| (scroll_partial
+				    && (b - t - count >
+					3 * vc->vc_rows >> 2)))) {
+				if (t > 0)
+					fbcon_redraw_move(vc, p, 0, t, count);
+				ypan_up_redraw(vc, t, count);
+				if (vc->vc_rows - b > 0)
+					fbcon_redraw_move(vc, p, b,
+							  vc->vc_rows - b, b);
+			} else
+				fbcon_redraw_move(vc, p, t + count, b - t - count, t);
+			fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
+			break;
+
+		case SCROLL_PAN_MOVE:
+			if ((p->yscroll + count <=
+			     2 * (p->vrows - vc->vc_rows))
+			    && ((!scroll_partial && (b - t == vc->vc_rows))
+				|| (scroll_partial
+				    && (b - t - count >
+					3 * vc->vc_rows >> 2)))) {
+				if (t > 0)
+					fbcon_bmove(vc, 0, 0, count, 0, t,
+						    vc->vc_cols);
+				ypan_up(vc, count);
+				if (vc->vc_rows - b > 0)
+					fbcon_bmove(vc, b - count, 0, b, 0,
+						    vc->vc_rows - b,
+						    vc->vc_cols);
+			} else if (info->flags & FBINFO_READS_FAST)
+				fbcon_bmove(vc, t + count, 0, t, 0,
+					    b - t - count, vc->vc_cols);
+			else
+				goto redraw_up;
+			fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
+			break;
+
+		case SCROLL_REDRAW:
+		      redraw_up:
+			fbcon_redraw(vc, p, t, b - t - count,
+				     count * vc->vc_cols);
+			fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
+			scr_memsetw((unsigned short *) (vc->vc_origin +
+							vc->vc_size_row *
+							(b - count)),
+				    vc->vc_video_erase_char,
+				    vc->vc_size_row * count);
+			return true;
+		}
+		break;
+
+	case SM_DOWN:
+		if (count > vc->vc_rows)	/* Maximum realistic size */
+			count = vc->vc_rows;
+		switch (fb_scrollmode(p)) {
+		case SCROLL_MOVE:
+			fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
+				     -count);
+			fbcon_clear(vc, t, 0, count, vc->vc_cols);
+			scr_memsetw((unsigned short *) (vc->vc_origin +
+							vc->vc_size_row *
+							t),
+				    vc->vc_video_erase_char,
+				    vc->vc_size_row * count);
+			return true;
+
+		case SCROLL_WRAP_MOVE:
+			if (b - t - count > 3 * vc->vc_rows >> 2) {
+				if (vc->vc_rows - b > 0)
+					fbcon_bmove(vc, b, 0, b - count, 0,
+						    vc->vc_rows - b,
+						    vc->vc_cols);
+				ywrap_down(vc, count);
+				if (t > 0)
+					fbcon_bmove(vc, count, 0, 0, 0, t,
+						    vc->vc_cols);
+			} else if (info->flags & FBINFO_READS_FAST)
+				fbcon_bmove(vc, t, 0, t + count, 0,
+					    b - t - count, vc->vc_cols);
+			else
+				goto redraw_down;
+			fbcon_clear(vc, t, 0, count, vc->vc_cols);
+			break;
+
+		case SCROLL_PAN_MOVE:
+			if ((count - p->yscroll <= p->vrows - vc->vc_rows)
+			    && ((!scroll_partial && (b - t == vc->vc_rows))
+				|| (scroll_partial
+				    && (b - t - count >
+					3 * vc->vc_rows >> 2)))) {
+				if (vc->vc_rows - b > 0)
+					fbcon_bmove(vc, b, 0, b - count, 0,
+						    vc->vc_rows - b,
+						    vc->vc_cols);
+				ypan_down(vc, count);
+				if (t > 0)
+					fbcon_bmove(vc, count, 0, 0, 0, t,
+						    vc->vc_cols);
+			} else if (info->flags & FBINFO_READS_FAST)
+				fbcon_bmove(vc, t, 0, t + count, 0,
+					    b - t - count, vc->vc_cols);
+			else
+				goto redraw_down;
+			fbcon_clear(vc, t, 0, count, vc->vc_cols);
+			break;
+
+		case SCROLL_PAN_REDRAW:
+			if ((count - p->yscroll <= p->vrows - vc->vc_rows)
+			    && ((!scroll_partial && (b - t == vc->vc_rows))
+				|| (scroll_partial
+				    && (b - t - count >
+					3 * vc->vc_rows >> 2)))) {
+				if (vc->vc_rows - b > 0)
+					fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
+							  b - count);
+				ypan_down_redraw(vc, t, count);
+				if (t > 0)
+					fbcon_redraw_move(vc, p, count, t, 0);
+			} else
+				fbcon_redraw_move(vc, p, t, b - t - count, t + count);
+			fbcon_clear(vc, t, 0, count, vc->vc_cols);
+			break;
+
+		case SCROLL_REDRAW:
+		      redraw_down:
+			fbcon_redraw(vc, p, b - 1, b - t - count,
+				     -count * vc->vc_cols);
+			fbcon_clear(vc, t, 0, count, vc->vc_cols);
+			scr_memsetw((unsigned short *) (vc->vc_origin +
+							vc->vc_size_row *
+							t),
+				    vc->vc_video_erase_char,
+				    vc->vc_size_row * count);
+			return true;
+		}
+	}
+	return false;
+}
+
+
+static void updatescrollmode_accel(struct fbcon_display *p,
+					struct fb_info *info,
+					struct vc_data *vc)
+{
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
+	struct fbcon_ops *ops = info->fbcon_par;
+	int cap = info->flags;
+	u16 t = 0;
+	int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
+				  info->fix.xpanstep);
+	int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
+	int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+	int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
+				   info->var.xres_virtual);
+	int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
+		divides(ypan, vc->vc_font.height) && vyres > yres;
+	int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
+		divides(ywrap, vc->vc_font.height) &&
+		divides(vc->vc_font.height, vyres) &&
+		divides(vc->vc_font.height, yres);
+	int reading_fast = cap & FBINFO_READS_FAST;
+	int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
+		!(cap & FBINFO_HWACCEL_DISABLED);
+	int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
+		!(cap & FBINFO_HWACCEL_DISABLED);
+
+	if (good_wrap || good_pan) {
+		if (reading_fast || fast_copyarea)
+			p->scrollmode = good_wrap ?
+				SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
+		else
+			p->scrollmode = good_wrap ? SCROLL_REDRAW :
+				SCROLL_PAN_REDRAW;
+	} else {
+		if (reading_fast || (fast_copyarea && !fast_imageblit))
+			p->scrollmode = SCROLL_MOVE;
+		else
+			p->scrollmode = SCROLL_REDRAW;
+	}
+#endif
+}
+
+static void updatescrollmode(struct fbcon_display *p,
+					struct fb_info *info,
+					struct vc_data *vc)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	int fh = vc->vc_font.height;
+	int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+	int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
+				   info->var.xres_virtual);
+
+	p->vrows = vyres/fh;
+	if (yres > (fh * (vc->vc_rows + 1)))
+		p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
+	if ((yres % fh) && (vyres % fh < yres % fh))
+		p->vrows--;
+
+	/* update scrollmode in case hardware acceleration is used */
+	updatescrollmode_accel(p, info, vc);
+}
+
+#define PITCH(w) (((w) + 7) >> 3)
+#define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
+
+static int fbcon_resize(struct vc_data *vc, unsigned int width, 
+			unsigned int height, unsigned int user)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	struct fb_var_screeninfo var = info->var;
+	int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
+
+	if (p->userfont && FNTSIZE(vc->vc_font.data)) {
+		int size;
+		int pitch = PITCH(vc->vc_font.width);
+
+		/*
+		 * If user font, ensure that a possible change to user font
+		 * height or width will not allow a font data out-of-bounds access.
+		 * NOTE: must use original charcount in calculation as font
+		 * charcount can change and cannot be used to determine the
+		 * font data allocated size.
+		 */
+		if (pitch <= 0)
+			return -EINVAL;
+		size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
+		if (size > FNTSIZE(vc->vc_font.data))
+			return -EINVAL;
+	}
+
+	virt_w = FBCON_SWAP(ops->rotate, width, height);
+	virt_h = FBCON_SWAP(ops->rotate, height, width);
+	virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
+				 vc->vc_font.height);
+	virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
+				 vc->vc_font.width);
+	var.xres = virt_w * virt_fw;
+	var.yres = virt_h * virt_fh;
+	x_diff = info->var.xres - var.xres;
+	y_diff = info->var.yres - var.yres;
+	if (x_diff < 0 || x_diff > virt_fw ||
+	    y_diff < 0 || y_diff > virt_fh) {
+		const struct fb_videomode *mode;
+
+		pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
+		mode = fb_find_best_mode(&var, &info->modelist);
+		if (mode == NULL)
+			return -EINVAL;
+		display_to_var(&var, p);
+		fb_videomode_to_var(&var, mode);
+
+		if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
+			return -EINVAL;
+
+		pr_debug("resize now %ix%i\n", var.xres, var.yres);
+		if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
+			var.activate = FB_ACTIVATE_NOW |
+				FB_ACTIVATE_FORCE;
+			fb_set_var(info, &var);
+		}
+		var_to_display(p, &info->var, info);
+		ops->var = info->var;
+	}
+	updatescrollmode(p, info, vc);
+	return 0;
+}
+
+static int fbcon_switch(struct vc_data *vc)
+{
+	struct fb_info *info, *old_info = NULL;
+	struct fbcon_ops *ops;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	struct fb_var_screeninfo var;
+	int i, ret, prev_console;
+
+	info = fbcon_info_from_console(vc->vc_num);
+	ops = info->fbcon_par;
+
+	if (logo_shown >= 0) {
+		struct vc_data *conp2 = vc_cons[logo_shown].d;
+
+		if (conp2->vc_top == logo_lines
+		    && conp2->vc_bottom == conp2->vc_rows)
+			conp2->vc_top = 0;
+		logo_shown = FBCON_LOGO_CANSHOW;
+	}
+
+	prev_console = ops->currcon;
+	if (prev_console != -1)
+		old_info = fbcon_info_from_console(prev_console);
+	/*
+	 * FIXME: If we have multiple fbdev's loaded, we need to
+	 * update all info->currcon.  Perhaps, we can place this
+	 * in a centralized structure, but this might break some
+	 * drivers.
+	 *
+	 * info->currcon = vc->vc_num;
+	 */
+	fbcon_for_each_registered_fb(i) {
+		if (fbcon_registered_fb[i]->fbcon_par) {
+			struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par;
+
+			o->currcon = vc->vc_num;
+		}
+	}
+	memset(&var, 0, sizeof(struct fb_var_screeninfo));
+	display_to_var(&var, p);
+	var.activate = FB_ACTIVATE_NOW;
+
+	/*
+	 * make sure we don't unnecessarily trip the memcmp()
+	 * in fb_set_var()
+	 */
+	info->var.activate = var.activate;
+	var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
+	fb_set_var(info, &var);
+	ops->var = info->var;
+
+	if (old_info != NULL && (old_info != info ||
+				 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
+		if (info->fbops->fb_set_par) {
+			ret = info->fbops->fb_set_par(info);
+
+			if (ret)
+				printk(KERN_ERR "fbcon_switch: detected "
+					"unhandled fb_set_par error, "
+					"error code %d\n", ret);
+		}
+
+		if (old_info != info)
+			fbcon_del_cursor_work(old_info);
+	}
+
+	if (fbcon_is_inactive(vc, info) ||
+	    ops->blank_state != FB_BLANK_UNBLANK)
+		fbcon_del_cursor_work(info);
+	else
+		fbcon_add_cursor_work(info);
+
+	set_blitting_type(vc, info);
+	ops->cursor_reset = 1;
+
+	if (ops->rotate_font && ops->rotate_font(info, vc)) {
+		ops->rotate = FB_ROTATE_UR;
+		set_blitting_type(vc, info);
+	}
+
+	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
+	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
+
+	if (vc->vc_font.charcount > 256)
+		vc->vc_complement_mask <<= 1;
+
+	updatescrollmode(p, info, vc);
+
+	switch (fb_scrollmode(p)) {
+	case SCROLL_WRAP_MOVE:
+		scrollback_phys_max = p->vrows - vc->vc_rows;
+		break;
+	case SCROLL_PAN_MOVE:
+	case SCROLL_PAN_REDRAW:
+		scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
+		if (scrollback_phys_max < 0)
+			scrollback_phys_max = 0;
+		break;
+	default:
+		scrollback_phys_max = 0;
+		break;
+	}
+
+	scrollback_max = 0;
+	scrollback_current = 0;
+
+	if (!fbcon_is_inactive(vc, info)) {
+	    ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
+	    ops->update_start(info);
+	}
+
+	fbcon_set_palette(vc, color_table); 	
+	fbcon_clear_margins(vc, 0);
+
+	if (logo_shown == FBCON_LOGO_DRAW) {
+
+		logo_shown = fg_console;
+		fb_show_logo(info, ops->rotate);
+		update_region(vc,
+			      vc->vc_origin + vc->vc_size_row * vc->vc_top,
+			      vc->vc_size_row * (vc->vc_bottom -
+						 vc->vc_top) / 2);
+		return 0;
+	}
+	return 1;
+}
+
+static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
+				int blank)
+{
+	if (blank) {
+		unsigned short charmask = vc->vc_hi_font_mask ?
+			0x1ff : 0xff;
+		unsigned short oldc;
+
+		oldc = vc->vc_video_erase_char;
+		vc->vc_video_erase_char &= charmask;
+		fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
+		vc->vc_video_erase_char = oldc;
+	}
+}
+
+static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (mode_switch) {
+		struct fb_var_screeninfo var = info->var;
+
+		ops->graphics = 1;
+
+		if (!blank) {
+			var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
+				FB_ACTIVATE_KD_TEXT;
+			fb_set_var(info, &var);
+			ops->graphics = 0;
+			ops->var = info->var;
+		}
+	}
+
+ 	if (!fbcon_is_inactive(vc, info)) {
+		if (ops->blank_state != blank) {
+			ops->blank_state = blank;
+			fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
+			ops->cursor_flash = (!blank);
+
+			if (fb_blank(info, blank))
+				fbcon_generic_blank(vc, info, blank);
+		}
+
+		if (!blank)
+			update_screen(vc);
+	}
+
+	if (mode_switch || fbcon_is_inactive(vc, info) ||
+	    ops->blank_state != FB_BLANK_UNBLANK)
+		fbcon_del_cursor_work(info);
+	else
+		fbcon_add_cursor_work(info);
+
+	return 0;
+}
+
+static int fbcon_debug_enter(struct vc_data *vc)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	ops->save_graphics = ops->graphics;
+	ops->graphics = 0;
+	if (info->fbops->fb_debug_enter)
+		info->fbops->fb_debug_enter(info);
+	fbcon_set_palette(vc, color_table);
+	return 0;
+}
+
+static int fbcon_debug_leave(struct vc_data *vc)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	ops->graphics = ops->save_graphics;
+	if (info->fbops->fb_debug_leave)
+		info->fbops->fb_debug_leave(info);
+	return 0;
+}
+
+static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
+{
+	u8 *fontdata = vc->vc_font.data;
+	u8 *data = font->data;
+	int i, j;
+
+	font->width = vc->vc_font.width;
+	font->height = vc->vc_font.height;
+	font->charcount = vc->vc_hi_font_mask ? 512 : 256;
+	if (!font->data)
+		return 0;
+
+	if (font->width <= 8) {
+		j = vc->vc_font.height;
+		if (font->charcount * j > FNTSIZE(fontdata))
+			return -EINVAL;
+
+		for (i = 0; i < font->charcount; i++) {
+			memcpy(data, fontdata, j);
+			memset(data + j, 0, 32 - j);
+			data += 32;
+			fontdata += j;
+		}
+	} else if (font->width <= 16) {
+		j = vc->vc_font.height * 2;
+		if (font->charcount * j > FNTSIZE(fontdata))
+			return -EINVAL;
+
+		for (i = 0; i < font->charcount; i++) {
+			memcpy(data, fontdata, j);
+			memset(data + j, 0, 64 - j);
+			data += 64;
+			fontdata += j;
+		}
+	} else if (font->width <= 24) {
+		if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
+			return -EINVAL;
+
+		for (i = 0; i < font->charcount; i++) {
+			for (j = 0; j < vc->vc_font.height; j++) {
+				*data++ = fontdata[0];
+				*data++ = fontdata[1];
+				*data++ = fontdata[2];
+				fontdata += sizeof(u32);
+			}
+			memset(data, 0, 3 * (32 - j));
+			data += 3 * (32 - j);
+		}
+	} else {
+		j = vc->vc_font.height * 4;
+		if (font->charcount * j > FNTSIZE(fontdata))
+			return -EINVAL;
+
+		for (i = 0; i < font->charcount; i++) {
+			memcpy(data, fontdata, j);
+			memset(data + j, 0, 128 - j);
+			data += 128;
+			fontdata += j;
+		}
+	}
+	return 0;
+}
+
+/* set/clear vc_hi_font_mask and update vc attrs accordingly */
+static void set_vc_hi_font(struct vc_data *vc, bool set)
+{
+	if (!set) {
+		vc->vc_hi_font_mask = 0;
+		if (vc->vc_can_do_color) {
+			vc->vc_complement_mask >>= 1;
+			vc->vc_s_complement_mask >>= 1;
+		}
+			
+		/* ++Edmund: reorder the attribute bits */
+		if (vc->vc_can_do_color) {
+			unsigned short *cp =
+			    (unsigned short *) vc->vc_origin;
+			int count = vc->vc_screenbuf_size / 2;
+			unsigned short c;
+			for (; count > 0; count--, cp++) {
+				c = scr_readw(cp);
+				scr_writew(((c & 0xfe00) >> 1) |
+					   (c & 0xff), cp);
+			}
+			c = vc->vc_video_erase_char;
+			vc->vc_video_erase_char =
+			    ((c & 0xfe00) >> 1) | (c & 0xff);
+			vc->vc_attr >>= 1;
+		}
+	} else {
+		vc->vc_hi_font_mask = 0x100;
+		if (vc->vc_can_do_color) {
+			vc->vc_complement_mask <<= 1;
+			vc->vc_s_complement_mask <<= 1;
+		}
+			
+		/* ++Edmund: reorder the attribute bits */
+		{
+			unsigned short *cp =
+			    (unsigned short *) vc->vc_origin;
+			int count = vc->vc_screenbuf_size / 2;
+			unsigned short c;
+			for (; count > 0; count--, cp++) {
+				unsigned short newc;
+				c = scr_readw(cp);
+				if (vc->vc_can_do_color)
+					newc =
+					    ((c & 0xff00) << 1) | (c &
+								   0xff);
+				else
+					newc = c & ~0x100;
+				scr_writew(newc, cp);
+			}
+			c = vc->vc_video_erase_char;
+			if (vc->vc_can_do_color) {
+				vc->vc_video_erase_char =
+				    ((c & 0xff00) << 1) | (c & 0xff);
+				vc->vc_attr <<= 1;
+			} else
+				vc->vc_video_erase_char = c & ~0x100;
+		}
+	}
+}
+
+static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
+			     const u8 * data, int userfont)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct fbcon_display *p = &fb_display[vc->vc_num];
+	int resize, ret, old_userfont, old_width, old_height, old_charcount;
+	char *old_data = NULL;
+
+	resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
+	if (p->userfont)
+		old_data = vc->vc_font.data;
+	vc->vc_font.data = (void *)(p->fontdata = data);
+	old_userfont = p->userfont;
+	if ((p->userfont = userfont))
+		REFCOUNT(data)++;
+
+	old_width = vc->vc_font.width;
+	old_height = vc->vc_font.height;
+	old_charcount = vc->vc_font.charcount;
+
+	vc->vc_font.width = w;
+	vc->vc_font.height = h;
+	vc->vc_font.charcount = charcount;
+	if (vc->vc_hi_font_mask && charcount == 256)
+		set_vc_hi_font(vc, false);
+	else if (!vc->vc_hi_font_mask && charcount == 512)
+		set_vc_hi_font(vc, true);
+
+	if (resize) {
+		int cols, rows;
+
+		cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+		rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+		cols /= w;
+		rows /= h;
+		ret = vc_resize(vc, cols, rows);
+		if (ret)
+			goto err_out;
+	} else if (con_is_visible(vc)
+		   && vc->vc_mode == KD_TEXT) {
+		fbcon_clear_margins(vc, 0);
+		update_screen(vc);
+	}
+
+	if (old_data && (--REFCOUNT(old_data) == 0))
+		kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
+	return 0;
+
+err_out:
+	p->fontdata = old_data;
+	vc->vc_font.data = (void *)old_data;
+
+	if (userfont) {
+		p->userfont = old_userfont;
+		if (--REFCOUNT(data) == 0)
+			kfree(data - FONT_EXTRA_WORDS * sizeof(int));
+	}
+
+	vc->vc_font.width = old_width;
+	vc->vc_font.height = old_height;
+	vc->vc_font.charcount = old_charcount;
+
+	return ret;
+}
+
+/*
+ *  User asked to set font; we are guaranteed that
+ *	a) width and height are in range 1..32
+ *	b) charcount does not exceed 512
+ *  but lets not assume that, since someone might someday want to use larger
+ *  fonts. And charcount of 512 is small for unicode support.
+ *
+ *  However, user space gives the font in 32 rows , regardless of
+ *  actual font height. So a new API is needed if support for larger fonts
+ *  is ever implemented.
+ */
+
+static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
+			  unsigned int flags)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	unsigned charcount = font->charcount;
+	int w = font->width;
+	int h = font->height;
+	int size;
+	int i, csum;
+	u8 *new_data, *data = font->data;
+	int pitch = PITCH(font->width);
+
+	/* Is there a reason why fbconsole couldn't handle any charcount >256?
+	 * If not this check should be changed to charcount < 256 */
+	if (charcount != 256 && charcount != 512)
+		return -EINVAL;
+
+	/* font bigger than screen resolution ? */
+	if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) ||
+	    h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres))
+		return -EINVAL;
+
+	if (font->width > 32 || font->height > 32)
+		return -EINVAL;
+
+	/* Make sure drawing engine can handle the font */
+	if (!(info->pixmap.blit_x & BIT(font->width - 1)) ||
+	    !(info->pixmap.blit_y & BIT(font->height - 1)))
+		return -EINVAL;
+
+	/* Make sure driver can handle the font length */
+	if (fbcon_invalid_charcount(info, charcount))
+		return -EINVAL;
+
+	size = CALC_FONTSZ(h, pitch, charcount);
+
+	new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
+
+	if (!new_data)
+		return -ENOMEM;
+
+	memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
+
+	new_data += FONT_EXTRA_WORDS * sizeof(int);
+	FNTSIZE(new_data) = size;
+	REFCOUNT(new_data) = 0;	/* usage counter */
+	for (i=0; i< charcount; i++) {
+		memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
+	}
+
+	/* Since linux has a nice crc32 function use it for counting font
+	 * checksums. */
+	csum = crc32(0, new_data, size);
+
+	FNTSUM(new_data) = csum;
+	/* Check if the same font is on some other console already */
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		struct vc_data *tmp = vc_cons[i].d;
+		
+		if (fb_display[i].userfont &&
+		    fb_display[i].fontdata &&
+		    FNTSUM(fb_display[i].fontdata) == csum &&
+		    FNTSIZE(fb_display[i].fontdata) == size &&
+		    tmp->vc_font.width == w &&
+		    !memcmp(fb_display[i].fontdata, new_data, size)) {
+			kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
+			new_data = (u8 *)fb_display[i].fontdata;
+			break;
+		}
+	}
+	return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
+}
+
+static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	const struct font_desc *f;
+
+	if (!name)
+		f = get_default_font(info->var.xres, info->var.yres,
+				     info->pixmap.blit_x, info->pixmap.blit_y);
+	else if (!(f = find_font(name)))
+		return -ENOENT;
+
+	font->width = f->width;
+	font->height = f->height;
+	return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
+}
+
+static u16 palette_red[16];
+static u16 palette_green[16];
+static u16 palette_blue[16];
+
+static struct fb_cmap palette_cmap = {
+	0, 16, palette_red, palette_green, palette_blue, NULL
+};
+
+static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
+{
+	struct fb_info *info = fbcon_info_from_console(vc->vc_num);
+	int i, j, k, depth;
+	u8 val;
+
+	if (fbcon_is_inactive(vc, info))
+		return;
+
+	if (!con_is_visible(vc))
+		return;
+
+	depth = fb_get_color_depth(&info->var, &info->fix);
+	if (depth > 3) {
+		for (i = j = 0; i < 16; i++) {
+			k = table[i];
+			val = vc->vc_palette[j++];
+			palette_red[k] = (val << 8) | val;
+			val = vc->vc_palette[j++];
+			palette_green[k] = (val << 8) | val;
+			val = vc->vc_palette[j++];
+			palette_blue[k] = (val << 8) | val;
+		}
+		palette_cmap.len = 16;
+		palette_cmap.start = 0;
+	/*
+	 * If framebuffer is capable of less than 16 colors,
+	 * use default palette of fbcon.
+	 */
+	} else
+		fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
+
+	fb_set_cmap(&palette_cmap, info);
+}
+
+static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
+{
+	return (u16 *) (vc->vc_origin + offset);
+}
+
+static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
+				 int *px, int *py)
+{
+	unsigned long ret;
+	int x, y;
+
+	if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
+		unsigned long offset = (pos - vc->vc_origin) / 2;
+
+		x = offset % vc->vc_cols;
+		y = offset / vc->vc_cols;
+		ret = pos + (vc->vc_cols - x) * 2;
+	} else {
+		/* Should not happen */
+		x = y = 0;
+		ret = vc->vc_origin;
+	}
+	if (px)
+		*px = x;
+	if (py)
+		*py = y;
+	return ret;
+}
+
+/* As we might be inside of softback, we may work with non-contiguous buffer,
+   that's why we have to use a separate routine. */
+static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
+{
+	while (cnt--) {
+		u16 a = scr_readw(p);
+		if (!vc->vc_can_do_color)
+			a ^= 0x0800;
+		else if (vc->vc_hi_font_mask == 0x100)
+			a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
+			    (((a) & 0x0e00) << 4);
+		else
+			a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
+			    (((a) & 0x0700) << 4);
+		scr_writew(a, p++);
+	}
+}
+
+void fbcon_suspended(struct fb_info *info)
+{
+	struct vc_data *vc = NULL;
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (!ops || ops->currcon < 0)
+		return;
+	vc = vc_cons[ops->currcon].d;
+
+	/* Clear cursor, restore saved data */
+	fbcon_cursor(vc, CM_ERASE);
+}
+
+void fbcon_resumed(struct fb_info *info)
+{
+	struct vc_data *vc;
+	struct fbcon_ops *ops = info->fbcon_par;
+
+	if (!ops || ops->currcon < 0)
+		return;
+	vc = vc_cons[ops->currcon].d;
+
+	update_screen(vc);
+}
+
+static void fbcon_modechanged(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct vc_data *vc;
+	struct fbcon_display *p;
+	int rows, cols;
+
+	if (!ops || ops->currcon < 0)
+		return;
+	vc = vc_cons[ops->currcon].d;
+	if (vc->vc_mode != KD_TEXT ||
+	    fbcon_info_from_console(ops->currcon) != info)
+		return;
+
+	p = &fb_display[vc->vc_num];
+	set_blitting_type(vc, info);
+
+	if (con_is_visible(vc)) {
+		var_to_display(p, &info->var, info);
+		cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+		rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+		cols /= vc->vc_font.width;
+		rows /= vc->vc_font.height;
+		vc_resize(vc, cols, rows);
+		updatescrollmode(p, info, vc);
+		scrollback_max = 0;
+		scrollback_current = 0;
+
+		if (!fbcon_is_inactive(vc, info)) {
+		    ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
+		    ops->update_start(info);
+		}
+
+		fbcon_set_palette(vc, color_table);
+		update_screen(vc);
+	}
+}
+
+static void fbcon_set_all_vcs(struct fb_info *info)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct vc_data *vc;
+	struct fbcon_display *p;
+	int i, rows, cols, fg = -1;
+
+	if (!ops || ops->currcon < 0)
+		return;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		vc = vc_cons[i].d;
+		if (!vc || vc->vc_mode != KD_TEXT ||
+		    fbcon_info_from_console(i) != info)
+			continue;
+
+		if (con_is_visible(vc)) {
+			fg = i;
+			continue;
+		}
+
+		p = &fb_display[vc->vc_num];
+		set_blitting_type(vc, info);
+		var_to_display(p, &info->var, info);
+		cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
+		rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
+		cols /= vc->vc_font.width;
+		rows /= vc->vc_font.height;
+		vc_resize(vc, cols, rows);
+	}
+
+	if (fg != -1)
+		fbcon_modechanged(info);
+}
+
+
+void fbcon_update_vcs(struct fb_info *info, bool all)
+{
+	if (all)
+		fbcon_set_all_vcs(info);
+	else
+		fbcon_modechanged(info);
+}
+EXPORT_SYMBOL(fbcon_update_vcs);
+
+/* let fbcon check if it supports a new screen resolution */
+int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct vc_data *vc;
+	unsigned int i;
+
+	WARN_CONSOLE_UNLOCKED();
+
+	if (!ops)
+		return 0;
+
+	/* prevent setting a screen size which is smaller than font size */
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		vc = vc_cons[i].d;
+		if (!vc || vc->vc_mode != KD_TEXT ||
+			   fbcon_info_from_console(i) != info)
+			continue;
+
+		if (vc->vc_font.width  > FBCON_SWAP(var->rotate, var->xres, var->yres) ||
+		    vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres))
+			return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(fbcon_modechange_possible);
+
+int fbcon_mode_deleted(struct fb_info *info,
+		       struct fb_videomode *mode)
+{
+	struct fb_info *fb_info;
+	struct fbcon_display *p;
+	int i, j, found = 0;
+
+	/* before deletion, ensure that mode is not in use */
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		j = con2fb_map[i];
+		if (j == -1)
+			continue;
+		fb_info = fbcon_registered_fb[j];
+		if (fb_info != info)
+			continue;
+		p = &fb_display[i];
+		if (!p || !p->mode)
+			continue;
+		if (fb_mode_is_equal(p->mode, mode)) {
+			found = 1;
+			break;
+		}
+	}
+	return found;
+}
+
+#ifdef CONFIG_VT_HW_CONSOLE_BINDING
+static void fbcon_unbind(void)
+{
+	int ret;
+
+	ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
+				fbcon_is_default);
+
+	if (!ret)
+		fbcon_has_console_bind = 0;
+}
+#else
+static inline void fbcon_unbind(void) {}
+#endif /* CONFIG_VT_HW_CONSOLE_BINDING */
+
+void fbcon_fb_unbind(struct fb_info *info)
+{
+	int i, new_idx = -1;
+	int idx = info->node;
+
+	console_lock();
+
+	if (!fbcon_has_console_bind) {
+		console_unlock();
+		return;
+	}
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		if (con2fb_map[i] != idx &&
+		    con2fb_map[i] != -1) {
+			new_idx = con2fb_map[i];
+			break;
+		}
+	}
+
+	if (new_idx != -1) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			if (con2fb_map[i] == idx)
+				set_con2fb_map(i, new_idx, 0);
+		}
+	} else {
+		struct fb_info *info = fbcon_registered_fb[idx];
+
+		/* This is sort of like set_con2fb_map, except it maps
+		 * the consoles to no device and then releases the
+		 * oldinfo to free memory and cancel the cursor blink
+		 * timer. I can imagine this just becoming part of
+		 * set_con2fb_map where new_idx is -1
+		 */
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			if (con2fb_map[i] == idx) {
+				con2fb_map[i] = -1;
+				if (!search_fb_in_map(idx)) {
+					con2fb_release_oldinfo(vc_cons[i].d,
+							       info, NULL);
+				}
+			}
+		}
+		fbcon_unbind();
+	}
+
+	console_unlock();
+}
+
+void fbcon_fb_unregistered(struct fb_info *info)
+{
+	int i, idx;
+
+	console_lock();
+
+	fbcon_registered_fb[info->node] = NULL;
+	fbcon_num_registered_fb--;
+
+	if (deferred_takeover) {
+		console_unlock();
+		return;
+	}
+
+	idx = info->node;
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		if (con2fb_map[i] == idx)
+			con2fb_map[i] = -1;
+	}
+
+	if (idx == info_idx) {
+		info_idx = -1;
+
+		fbcon_for_each_registered_fb(i) {
+			info_idx = i;
+			break;
+		}
+	}
+
+	if (info_idx != -1) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			if (con2fb_map[i] == -1)
+				con2fb_map[i] = info_idx;
+		}
+	}
+
+	if (primary_device == idx)
+		primary_device = -1;
+
+	if (!fbcon_num_registered_fb)
+		do_unregister_con_driver(&fb_con);
+	console_unlock();
+}
+
+void fbcon_remap_all(struct fb_info *info)
+{
+	int i, idx = info->node;
+
+	console_lock();
+	if (deferred_takeover) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++)
+			con2fb_map_boot[i] = idx;
+		fbcon_map_override();
+		console_unlock();
+		return;
+	}
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++)
+		set_con2fb_map(i, idx, 0);
+
+	if (con_is_bound(&fb_con)) {
+		printk(KERN_INFO "fbcon: Remapping primary device, "
+		       "fb%i, to tty %i-%i\n", idx,
+		       first_fb_vc + 1, last_fb_vc + 1);
+		info_idx = idx;
+	}
+	console_unlock();
+}
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
+static void fbcon_select_primary(struct fb_info *info)
+{
+	if (!map_override && primary_device == -1 &&
+	    fb_is_primary_device(info)) {
+		int i;
+
+		printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
+		       info->fix.id, info->node);
+		primary_device = info->node;
+
+		for (i = first_fb_vc; i <= last_fb_vc; i++)
+			con2fb_map_boot[i] = primary_device;
+
+		if (con_is_bound(&fb_con)) {
+			printk(KERN_INFO "fbcon: Remapping primary device, "
+			       "fb%i, to tty %i-%i\n", info->node,
+			       first_fb_vc + 1, last_fb_vc + 1);
+			info_idx = primary_device;
+		}
+	}
+
+}
+#else
+static inline void fbcon_select_primary(struct fb_info *info)
+{
+	return;
+}
+#endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
+
+static bool lockless_register_fb;
+module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400);
+MODULE_PARM_DESC(lockless_register_fb,
+	"Lockless framebuffer registration for debugging [default=off]");
+
+/* called with console_lock held */
+static int do_fb_registered(struct fb_info *info)
+{
+	int ret = 0, i, idx;
+
+	WARN_CONSOLE_UNLOCKED();
+
+	fbcon_registered_fb[info->node] = info;
+	fbcon_num_registered_fb++;
+
+	idx = info->node;
+	fbcon_select_primary(info);
+
+	if (deferred_takeover) {
+		pr_info("fbcon: Deferring console take-over\n");
+		return 0;
+	}
+
+	if (info_idx == -1) {
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			if (con2fb_map_boot[i] == idx) {
+				info_idx = idx;
+				break;
+			}
+		}
+
+		if (info_idx != -1)
+			ret = do_fbcon_takeover(1);
+	} else {
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			if (con2fb_map_boot[i] == idx)
+				set_con2fb_map(i, idx, 0);
+		}
+	}
+
+	return ret;
+}
+
+int fbcon_fb_registered(struct fb_info *info)
+{
+	int ret;
+
+	if (!lockless_register_fb)
+		console_lock();
+	else
+		atomic_inc(&ignore_console_lock_warning);
+
+	ret = do_fb_registered(info);
+
+	if (!lockless_register_fb)
+		console_unlock();
+	else
+		atomic_dec(&ignore_console_lock_warning);
+
+	return ret;
+}
+
+void fbcon_fb_blanked(struct fb_info *info, int blank)
+{
+	struct fbcon_ops *ops = info->fbcon_par;
+	struct vc_data *vc;
+
+	if (!ops || ops->currcon < 0)
+		return;
+
+	vc = vc_cons[ops->currcon].d;
+	if (vc->vc_mode != KD_TEXT ||
+			fbcon_info_from_console(ops->currcon) != info)
+		return;
+
+	if (con_is_visible(vc)) {
+		if (blank)
+			do_blank_screen(0);
+		else
+			do_unblank_screen(0);
+	}
+	ops->blank_state = blank;
+}
+
+void fbcon_new_modelist(struct fb_info *info)
+{
+	int i;
+	struct vc_data *vc;
+	struct fb_var_screeninfo var;
+	const struct fb_videomode *mode;
+
+	for (i = first_fb_vc; i <= last_fb_vc; i++) {
+		if (fbcon_info_from_console(i) != info)
+			continue;
+		if (!fb_display[i].mode)
+			continue;
+		vc = vc_cons[i].d;
+		display_to_var(&var, &fb_display[i]);
+		mode = fb_find_nearest_mode(fb_display[i].mode,
+					    &info->modelist);
+		fb_videomode_to_var(&var, mode);
+		fbcon_set_disp(info, &var, vc->vc_num);
+	}
+}
+
+void fbcon_get_requirement(struct fb_info *info,
+			   struct fb_blit_caps *caps)
+{
+	struct vc_data *vc;
+
+	if (caps->flags) {
+		int i, charcnt;
+
+		for (i = first_fb_vc; i <= last_fb_vc; i++) {
+			vc = vc_cons[i].d;
+			if (vc && vc->vc_mode == KD_TEXT &&
+			    info->node == con2fb_map[i]) {
+				caps->x |= 1 << (vc->vc_font.width - 1);
+				caps->y |= 1 << (vc->vc_font.height - 1);
+				charcnt = vc->vc_font.charcount;
+				if (caps->len < charcnt)
+					caps->len = charcnt;
+			}
+		}
+	} else {
+		vc = vc_cons[fg_console].d;
+
+		if (vc && vc->vc_mode == KD_TEXT &&
+		    info->node == con2fb_map[fg_console]) {
+			caps->x = 1 << (vc->vc_font.width - 1);
+			caps->y = 1 << (vc->vc_font.height - 1);
+			caps->len = vc->vc_font.charcount;
+		}
+	}
+}
+
+int fbcon_set_con2fb_map_ioctl(void __user *argp)
+{
+	struct fb_con2fbmap con2fb;
+	int ret;
+
+	if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
+		return -EFAULT;
+	if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
+		return -EINVAL;
+	if (con2fb.framebuffer >= FB_MAX)
+		return -EINVAL;
+	if (!fbcon_registered_fb[con2fb.framebuffer])
+		request_module("fb%d", con2fb.framebuffer);
+	if (!fbcon_registered_fb[con2fb.framebuffer]) {
+		return -EINVAL;
+	}
+
+	console_lock();
+	ret = set_con2fb_map(con2fb.console - 1,
+			     con2fb.framebuffer, 1);
+	console_unlock();
+
+	return ret;
+}
+
+int fbcon_get_con2fb_map_ioctl(void __user *argp)
+{
+	struct fb_con2fbmap con2fb;
+
+	if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
+		return -EFAULT;
+	if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
+		return -EINVAL;
+
+	console_lock();
+	con2fb.framebuffer = con2fb_map[con2fb.console - 1];
+	console_unlock();
+
+	return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
+}
+
+/*
+ *  The console `switch' structure for the frame buffer based console
+ */
+
+static const struct consw fb_con = {
+	.owner			= THIS_MODULE,
+	.con_startup 		= fbcon_startup,
+	.con_init 		= fbcon_init,
+	.con_deinit 		= fbcon_deinit,
+	.con_clear 		= fbcon_clear,
+	.con_putc 		= fbcon_putc,
+	.con_putcs 		= fbcon_putcs,
+	.con_cursor 		= fbcon_cursor,
+	.con_scroll 		= fbcon_scroll,
+	.con_switch 		= fbcon_switch,
+	.con_blank 		= fbcon_blank,
+	.con_font_set 		= fbcon_set_font,
+	.con_font_get 		= fbcon_get_font,
+	.con_font_default	= fbcon_set_def_font,
+	.con_set_palette 	= fbcon_set_palette,
+	.con_invert_region 	= fbcon_invert_region,
+	.con_screen_pos 	= fbcon_screen_pos,
+	.con_getxy 		= fbcon_getxy,
+	.con_resize             = fbcon_resize,
+	.con_debug_enter	= fbcon_debug_enter,
+	.con_debug_leave	= fbcon_debug_leave,
+};
+
+static ssize_t store_rotate(struct device *device,
+			    struct device_attribute *attr, const char *buf,
+			    size_t count)
+{
+	struct fb_info *info;
+	int rotate, idx;
+	char **last = NULL;
+
+	console_lock();
+	idx = con2fb_map[fg_console];
+
+	if (idx == -1 || fbcon_registered_fb[idx] == NULL)
+		goto err;
+
+	info = fbcon_registered_fb[idx];
+	rotate = simple_strtoul(buf, last, 0);
+	fbcon_rotate(info, rotate);
+err:
+	console_unlock();
+	return count;
+}
+
+static ssize_t store_rotate_all(struct device *device,
+				struct device_attribute *attr,const char *buf,
+				size_t count)
+{
+	struct fb_info *info;
+	int rotate, idx;
+	char **last = NULL;
+
+	console_lock();
+	idx = con2fb_map[fg_console];
+
+	if (idx == -1 || fbcon_registered_fb[idx] == NULL)
+		goto err;
+
+	info = fbcon_registered_fb[idx];
+	rotate = simple_strtoul(buf, last, 0);
+	fbcon_rotate_all(info, rotate);
+err:
+	console_unlock();
+	return count;
+}
+
+static ssize_t show_rotate(struct device *device,
+			   struct device_attribute *attr,char *buf)
+{
+	struct fb_info *info;
+	int rotate = 0, idx;
+
+	console_lock();
+	idx = con2fb_map[fg_console];
+
+	if (idx == -1 || fbcon_registered_fb[idx] == NULL)
+		goto err;
+
+	info = fbcon_registered_fb[idx];
+	rotate = fbcon_get_rotate(info);
+err:
+	console_unlock();
+	return sysfs_emit(buf, "%d\n", rotate);
+}
+
+static ssize_t show_cursor_blink(struct device *device,
+				 struct device_attribute *attr, char *buf)
+{
+	struct fb_info *info;
+	struct fbcon_ops *ops;
+	int idx, blink = -1;
+
+	console_lock();
+	idx = con2fb_map[fg_console];
+
+	if (idx == -1 || fbcon_registered_fb[idx] == NULL)
+		goto err;
+
+	info = fbcon_registered_fb[idx];
+	ops = info->fbcon_par;
+
+	if (!ops)
+		goto err;
+
+	blink = delayed_work_pending(&ops->cursor_work);
+err:
+	console_unlock();
+	return sysfs_emit(buf, "%d\n", blink);
+}
+
+static ssize_t store_cursor_blink(struct device *device,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	struct fb_info *info;
+	int blink, idx;
+	char **last = NULL;
+
+	console_lock();
+	idx = con2fb_map[fg_console];
+
+	if (idx == -1 || fbcon_registered_fb[idx] == NULL)
+		goto err;
+
+	info = fbcon_registered_fb[idx];
+
+	if (!info->fbcon_par)
+		goto err;
+
+	blink = simple_strtoul(buf, last, 0);
+
+	if (blink) {
+		fbcon_cursor_noblink = 0;
+		fbcon_add_cursor_work(info);
+	} else {
+		fbcon_cursor_noblink = 1;
+		fbcon_del_cursor_work(info);
+	}
+
+err:
+	console_unlock();
+	return count;
+}
+
+static struct device_attribute device_attrs[] = {
+	__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
+	__ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
+	__ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
+	       store_cursor_blink),
+};
+
+static int fbcon_init_device(void)
+{
+	int i, error = 0;
+
+	fbcon_has_sysfs = 1;
+
+	for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
+		error = device_create_file(fbcon_device, &device_attrs[i]);
+
+		if (error)
+			break;
+	}
+
+	if (error) {
+		while (--i >= 0)
+			device_remove_file(fbcon_device, &device_attrs[i]);
+
+		fbcon_has_sysfs = 0;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
+static void fbcon_register_existing_fbs(struct work_struct *work)
+{
+	int i;
+
+	console_lock();
+
+	deferred_takeover = false;
+	logo_shown = FBCON_LOGO_DONTSHOW;
+
+	fbcon_for_each_registered_fb(i)
+		do_fb_registered(fbcon_registered_fb[i]);
+
+	console_unlock();
+}
+
+static struct notifier_block fbcon_output_nb;
+static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
+
+static int fbcon_output_notifier(struct notifier_block *nb,
+				 unsigned long action, void *data)
+{
+	WARN_CONSOLE_UNLOCKED();
+
+	pr_info("fbcon: Taking over console\n");
+
+	dummycon_unregister_output_notifier(&fbcon_output_nb);
+
+	/* We may get called in atomic context */
+	schedule_work(&fbcon_deferred_takeover_work);
+
+	return NOTIFY_OK;
+}
+#endif
+
+static void fbcon_start(void)
+{
+	WARN_CONSOLE_UNLOCKED();
+
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
+	if (conswitchp != &dummy_con)
+		deferred_takeover = false;
+
+	if (deferred_takeover) {
+		fbcon_output_nb.notifier_call = fbcon_output_notifier;
+		dummycon_register_output_notifier(&fbcon_output_nb);
+		return;
+	}
+#endif
+}
+
+void __init fb_console_init(void)
+{
+	int i;
+
+	console_lock();
+	fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
+				     "fbcon");
+
+	if (IS_ERR(fbcon_device)) {
+		printk(KERN_WARNING "Unable to create device "
+		       "for fbcon; errno = %ld\n",
+		       PTR_ERR(fbcon_device));
+		fbcon_device = NULL;
+	} else
+		fbcon_init_device();
+
+	for (i = 0; i < MAX_NR_CONSOLES; i++)
+		con2fb_map[i] = -1;
+
+	fbcon_start();
+	console_unlock();
+}
+
+#ifdef MODULE
+
+static void __exit fbcon_deinit_device(void)
+{
+	int i;
+
+	if (fbcon_has_sysfs) {
+		for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
+			device_remove_file(fbcon_device, &device_attrs[i]);
+
+		fbcon_has_sysfs = 0;
+	}
+}
+
+void __exit fb_console_exit(void)
+{
+#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
+	console_lock();
+	if (deferred_takeover)
+		dummycon_unregister_output_notifier(&fbcon_output_nb);
+	console_unlock();
+
+	cancel_work_sync(&fbcon_deferred_takeover_work);
+#endif
+
+	console_lock();
+	fbcon_deinit_device();
+	device_destroy(fb_class, MKDEV(0, 0));
+
+	do_unregister_con_driver(&fb_con);
+	console_unlock();
+}	
+#endif