fbcon.c 83.0 KB
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/*
 *  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.
 */

#undef FBCONDEBUG

#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/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 <asm/irq.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#ifdef CONFIG_ATARI
#include <asm/atariints.h>
#endif
#ifdef CONFIG_MAC
#include <asm/macints.h>
#endif
#if defined(__mc68000__) || defined(CONFIG_APUS)
#include <asm/machdep.h>
#include <asm/setup.h>
#endif

#include "fbcon.h"

#ifdef FBCONDEBUG
#  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
#else
#  define DPRINTK(fmt, args...)
#endif

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 */
};

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static struct display fb_display[MAX_NR_CONSOLES];
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static signed char con2fb_map[MAX_NR_CONSOLES];
static signed char con2fb_map_boot[MAX_NR_CONSOLES];
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#ifndef MODULE
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static int logo_height;
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#endif
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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;
/* Software scrollback */
static int fbcon_softback_size = 32768;
static unsigned long softback_buf, softback_curr;
static unsigned long softback_in;
static unsigned long softback_top, softback_end;
static int softback_lines;
/* console mappings */
static int first_fb_vc;
static int last_fb_vc = MAX_NR_CONSOLES - 1;
static int fbcon_is_default = 1; 
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static int fbcon_has_exited;

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/* font data */
static char fontname[40];

/* current fb_info */
static int info_idx = -1;

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/* console rotation */
static int rotate;
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static int fbcon_has_sysfs;
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static const struct consw fb_con;

#define CM_SOFTBACK	(8)

#define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)

static int fbcon_set_origin(struct vc_data *);

#define CURSOR_DRAW_DELAY		(1)

/* # VBL ints between cursor state changes */
#define ATARI_CURSOR_BLINK_RATE		(42)
#define MAC_CURSOR_BLINK_RATE		(32)
#define DEFAULT_CURSOR_BLINK_RATE	(20)

static int vbl_cursor_cnt;

#define divides(a, b)	((!(a) || (b)%(a)) ? 0 : 1)

/*
 *  Interface used by the world
 */

static const char *fbcon_startup(void);
static void fbcon_init(struct vc_data *vc, int init);
static void fbcon_deinit(struct vc_data *vc);
static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
			int width);
static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
			int count, int ypos, int xpos);
static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
static void fbcon_cursor(struct vc_data *vc, int mode);
static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
			int count);
static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
			int height, int width);
static int fbcon_switch(struct vc_data *vc);
static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
static int fbcon_scrolldelta(struct vc_data *vc, int lines);

/*
 *  Internal routines
 */
static __inline__ void ywrap_up(struct vc_data *vc, int count);
static __inline__ void ywrap_down(struct vc_data *vc, int count);
static __inline__ void ypan_up(struct vc_data *vc, int count);
static __inline__ void ypan_down(struct vc_data *vc, int count);
static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
			    int dy, int dx, int height, int width, u_int y_break);
static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
			   struct vc_data *vc);
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
			      int unit);
static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
			      int line, int count, int dy);
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static void fbcon_modechanged(struct fb_info *info);
static void fbcon_set_all_vcs(struct fb_info *info);
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static void fbcon_start(void);
static void fbcon_exit(void);
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static struct class_device *fbcon_class_device;

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#ifdef CONFIG_MAC
/*
 * On the Macintoy, there may or may not be a working VBL int. We need to probe
 */
static int vbl_detected;

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static irqreturn_t fb_vbl_detect(int irq, void *dummy)
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{
	vbl_detected++;
	return IRQ_HANDLED;
}
#endif

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#ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
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static inline void fbcon_set_rotation(struct fb_info *info)
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{
	struct fbcon_ops *ops = info->fbcon_par;

	if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
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	    ops->p->con_rotate < 4)
		ops->rotate = ops->p->con_rotate;
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	else
		ops->rotate = 0;
}
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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 = registered_fb[con2fb_map[ops->currcon]];

	if (info == fb_info) {
		struct 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 display *p;
	int i;

	if (!ops || ops->currcon < 0 || rotate > 3)
		return;

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	for (i = first_fb_vc; i <= last_fb_vc; i++) {
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		vc = vc_cons[i].d;
		if (!vc || vc->vc_mode != KD_TEXT ||
		    registered_fb[con2fb_map[i]] != info)
			continue;

		p = &fb_display[vc->vc_num];
		p->con_rotate = rotate;
	}

	fbcon_set_all_vcs(info);
}
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#else
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static inline void fbcon_set_rotation(struct fb_info *info)
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{
	struct fbcon_ops *ops = info->fbcon_par;

	ops->rotate = FB_ROTATE_UR;
}
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static void fbcon_rotate(struct fb_info *info, u32 rotate)
{
	return;
}

static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
{
	return;
}
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#endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
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static int fbcon_get_rotate(struct fb_info *info)
{
	struct fbcon_ops *ops = info->fbcon_par;

	return (ops) ? ops->rotate : 0;
}

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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 inline int get_color(struct vc_data *vc, struct fb_info *info,
	      u16 c, int is_fg)
{
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	int depth = fb_get_color_depth(&info->var, &info->fix);
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	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:
	{
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		int col = ~(0xfff << (max(info->var.green.length,
					  max(info->var.red.length,
					      info->var.blue.length)))) & 0xff;

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		/* 0 or 1 */
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		int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
		int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
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		if (console_blanked)
			fg = bg;

		color = (is_fg) ? fg : bg;
		break;
	}
	case 2:
		/*
		 * Scale down 16-colors to 4 colors. Default 4-color palette
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		 * 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.
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		 */
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		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;
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	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;
}

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static void fbcon_update_softback(struct vc_data *vc)
{
	int l = fbcon_softback_size / vc->vc_size_row;

	if (l > 5)
		softback_end = softback_buf + l * vc->vc_size_row;
	else
		/* Smaller scrollback makes no sense, and 0 would screw
		   the operation totally */
		softback_top = 0;
}

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static void fb_flashcursor(struct work_struct *work)
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{
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	struct fb_info *info = container_of(work, struct fb_info, queue);
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	struct fbcon_ops *ops = info->fbcon_par;
	struct display *p;
	struct vc_data *vc = NULL;
	int c;
	int mode;

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	acquire_console_sem();
	if (ops && ops->currcon != -1)
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		vc = vc_cons[ops->currcon].d;

	if (!vc || !CON_IS_VISIBLE(vc) ||
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 	    registered_fb[con2fb_map[vc->vc_num]] != info ||
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	    vc->vc_deccm != 1) {
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		release_console_sem();
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		return;
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	}

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	p = &fb_display[vc->vc_num];
	c = scr_readw((u16 *) vc->vc_pos);
	mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
		CM_ERASE : CM_DRAW;
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	ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
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		    get_color(vc, info, c, 0));
	release_console_sem();
}

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#if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
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static int cursor_blink_rate;
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static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
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{
	struct fb_info *info = dev_id;

	if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
		schedule_work(&info->queue);	
		vbl_cursor_cnt = cursor_blink_rate; 
	}
	return IRQ_HANDLED;
}
#endif
	
static void cursor_timer_handler(unsigned long dev_addr)
{
	struct fb_info *info = (struct fb_info *) dev_addr;
	struct fbcon_ops *ops = info->fbcon_par;

	schedule_work(&info->queue);
	mod_timer(&ops->cursor_timer, jiffies + HZ/5);
}

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static void fbcon_add_cursor_timer(struct fb_info *info)
{
	struct fbcon_ops *ops = info->fbcon_par;

	if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
	    !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
		if (!info->queue.func)
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			INIT_WORK(&info->queue, fb_flashcursor);
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		init_timer(&ops->cursor_timer);
		ops->cursor_timer.function = cursor_timer_handler;
		ops->cursor_timer.expires = jiffies + HZ / 5;
		ops->cursor_timer.data = (unsigned long ) info;
		add_timer(&ops->cursor_timer);
		ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
	}
}

static void fbcon_del_cursor_timer(struct fb_info *info)
{
	struct fbcon_ops *ops = info->fbcon_par;

	if (info->queue.func == fb_flashcursor &&
	    ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
		del_timer_sync(&ops->cursor_timer);
		ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
	}
}

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#ifndef MODULE
static int __init fb_console_setup(char *this_opt)
{
	char *options;
	int i, j;

	if (!this_opt || !*this_opt)
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		return 1;
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	while ((options = strsep(&this_opt, ",")) != NULL) {
		if (!strncmp(options, "font:", 5))
			strcpy(fontname, options + 5);
		
		if (!strncmp(options, "scrollback:", 11)) {
			options += 11;
			if (*options) {
				fbcon_softback_size = simple_strtoul(options, &options, 0);
				if (*options == 'k' || *options == 'K') {
					fbcon_softback_size *= 1024;
					options++;
				}
				if (*options != ',')
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					return 1;
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				options++;
			} else
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				return 1;
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		}
		
		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;
				}
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			return 1;
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		}

		if (!strncmp(options, "vc:", 3)) {
			options += 3;
			if (*options)
				first_fb_vc = simple_strtoul(options, &options, 10) - 1;
			if (first_fb_vc < 0)
				first_fb_vc = 0;
			if (*options++ == '-')
				last_fb_vc = simple_strtoul(options, &options, 10) - 1;
			fbcon_is_default = 0; 
		}	
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		if (!strncmp(options, "rotate:", 7)) {
			options += 7;
			if (*options)
				rotate = simple_strtoul(options, &options, 0);
			if (rotate > 3)
				rotate = 0;
		}
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	}
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	return 1;
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}

__setup("fbcon=", fb_console_setup);
#endif

static int search_fb_in_map(int idx)
{
	int i, retval = 0;

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	for (i = first_fb_vc; i <= last_fb_vc; i++) {
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		if (con2fb_map[i] == idx)
			retval = 1;
	}
	return retval;
}

static int search_for_mapped_con(void)
{
	int i, retval = 0;

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	for (i = first_fb_vc; i <= last_fb_vc; i++) {
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		if (con2fb_map[i] != -1)
			retval = 1;
	}
	return retval;
}

static int fbcon_takeover(int show_logo)
{
	int err, i;

	if (!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 = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
				fbcon_is_default);
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	if (err) {
		for (i = first_fb_vc; i <= last_fb_vc; i++) {
			con2fb_map[i] = -1;
		}
		info_idx = -1;
	}

	return err;
}

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#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
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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 */
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	struct fbcon_ops *ops = info->fbcon_par;
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	int cnt, erase = vc->vc_video_erase_char, step;
	unsigned short *save = NULL, *r, *q;

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	if (info->flags & FBINFO_MODULE) {
		logo_shown = FBCON_LOGO_DONTSHOW;
		return;
	}

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	/*
	 * remove underline attribute from erase character
	 * if black and white framebuffer.
	 */
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	if (fb_get_color_depth(&info->var, &info->fix) == 1)
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		erase &= ~0x400;
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	logo_height = fb_prepare_logo(info, ops->rotate);
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	logo_lines = (logo_height + vc->vc_font.height - 1) /
		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 = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
		if (save) {
			int i = cols < new_cols ? cols : new_cols;
			scr_memsetw(save, erase, 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) {
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			int lines;
			if (vc->vc_y + logo_lines >= rows)
				lines = rows - vc->vc_y - 1;
			else
				lines = logo_lines;
			vc->vc_y += lines;
			vc->vc_pos += lines * vc->vc_size_row;
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		}
	}
	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, logo_lines * new_cols * 2);
		vc->vc_y += logo_lines;
		vc->vc_pos += logo_lines * vc->vc_size_row;
		kfree(save);
	}

	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 if (logo_shown != FBCON_LOGO_DONTSHOW) {
		logo_shown = FBCON_LOGO_DRAW;
		vc->vc_top = logo_lines;
	}
}
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#endif /* MODULE */
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#ifdef CONFIG_FB_TILEBLITTING
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static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
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{
	struct fbcon_ops *ops = info->fbcon_par;

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	ops->p = &fb_display[vc->vc_num];
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	if ((info->flags & FBINFO_MISC_TILEBLITTING))
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		fbcon_set_tileops(vc, info);
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	else {
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		fbcon_set_rotation(info);
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		fbcon_set_bitops(ops);
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	}
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}
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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;
}
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#else
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static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
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{
	struct fbcon_ops *ops = info->fbcon_par;

	info->flags &= ~FBINFO_MISC_TILEBLITTING;
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	ops->p = &fb_display[vc->vc_num];
	fbcon_set_rotation(info);
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	fbcon_set_bitops(ops);
}
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static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
{
	return 0;
}

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#endif /* CONFIG_MISC_TILEBLITTING */


static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
				  int unit, int oldidx)
{
	struct fbcon_ops *ops = NULL;
	int err = 0;

	if (!try_module_get(info->fbops->owner))
		err = -ENODEV;

	if (!err && info->fbops->fb_open &&
	    info->fbops->fb_open(info, 0))
		err = -ENODEV;

	if (!err) {
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		ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
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		if (!ops)
			err = -ENOMEM;
	}

	if (!err) {
		info->fbcon_par = ops;
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		set_blitting_type(vc, info);
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	}

	if (err) {
		con2fb_map[unit] = oldidx;
		module_put(info->fbops->owner);
	}

	return err;
}

static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
				  struct fb_info *newinfo, int unit,
				  int oldidx, int found)
{
	struct fbcon_ops *ops = oldinfo->fbcon_par;
	int err = 0;

	if (oldinfo->fbops->fb_release &&
	    oldinfo->fbops->fb_release(oldinfo, 0)) {
		con2fb_map[unit] = oldidx;
		if (!found && newinfo->fbops->fb_release)
			newinfo->fbops->fb_release(newinfo, 0);
		if (!found)
			module_put(newinfo->fbops->owner);
		err = -ENODEV;
	}

	if (!err) {
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		fbcon_del_cursor_timer(oldinfo);
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		kfree(ops->cursor_state.mask);
		kfree(ops->cursor_data);
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		kfree(ops->fontbuffer);
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		kfree(oldinfo->fbcon_par);
		oldinfo->fbcon_par = NULL;
		module_put(oldinfo->fbops->owner);
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		/*
		  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->fbops->fb_set_par)
			newinfo->fbops->fb_set_par(newinfo);
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	}

	return err;
}

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;

	ops->currcon = fg_console;

	if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
		info->fbops->fb_set_par(info);

	ops->flags |= FBCON_FLAGS_INIT;
	ops->graphics = 0;

	if (vc)
		fbcon_set_disp(info, &info->var, vc);
	else
		fbcon_preset_disp(info, &info->var, unit);

	if (show_logo) {
		struct vc_data *fg_vc = vc_cons[fg_console].d;
		struct fb_info *fg_info =
			registered_fb[con2fb_map[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.
 */
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 = registered_fb[newidx];
	struct fb_info *oldinfo = NULL;
 	int found, err = 0;

	if (oldidx == newidx)
		return 0;

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	if (!info || fbcon_has_exited)
		return -EINVAL;
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 	if (!err && !search_for_mapped_con()) {
		info_idx = newidx;
		return fbcon_takeover(0);
	}

	if (oldidx != -1)
		oldinfo = registered_fb[oldidx];

	found = search_fb_in_map(newidx);

	acquire_console_sem();
	con2fb_map[unit] = newidx;
	if (!err && !found)
 		err = con2fb_acquire_newinfo(vc, info, unit, oldidx);


	/*
	 * If old fb is not mapped to any of the consoles,
	 * fbcon should release it.
	 */
 	if (!err && oldinfo && !search_fb_in_map(oldidx))
 		err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 					     found);

 	if (!err) {
 		int show_logo = (fg_console == 0 && !user &&
 				 logo_shown != FBCON_LOGO_DONTSHOW);

 		if (!found)
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 			fbcon_add_cursor_timer(info);
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 		con2fb_map_boot[unit] = newidx;
 		con2fb_init_display(vc, info, unit, show_logo);
	}

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	if (!search_fb_in_map(info_idx))
		info_idx = newidx;

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	release_console_sem();
 	return err;
}

/*
 *  Low Level Operations
 */
/* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
static int var_to_display(struct 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 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 display *p = &fb_display[fg_console];
	struct vc_data *vc = vc_cons[fg_console].d;
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	const struct font_desc *font = NULL;
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	struct module *owner;
	struct fb_info *info = NULL;
	struct fbcon_ops *ops;
	int rows, cols;
	int irqres;

	irqres = 1;
	/*
	 *  If num_registered_fb is zero, this is a call for the dummy part.
	 *  The frame buffer devices weren't initialized yet.
	 */
	if (!num_registered_fb || info_idx == -1)
		return display_desc;
	/*
	 * Instead of blindly using registered_fb[0], we use info_idx, set by
	 * fb_console_init();
	 */
	info = registered_fb[info_idx];
	if (!info)
		return NULL;
	
	owner = info->fbops->owner;
	if (!try_module_get(owner))
		return NULL;
	if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
		module_put(owner);
		return NULL;
	}

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	ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
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	if (!ops) {
		module_put(owner);
		return NULL;
	}

	ops->currcon = -1;
	ops->graphics = 1;
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	ops->cur_rotate = -1;
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	info->fbcon_par = ops;
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	p->con_rotate = rotate;
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	set_blitting_type(vc, info);
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	if (info->fix.type != FB_TYPE_TEXT) {
		if (fbcon_softback_size) {
			if (!softback_buf) {
				softback_buf =
				    (unsigned long)
				    kmalloc(fbcon_softback_size,
					    GFP_KERNEL);
				if (!softback_buf) {
					fbcon_softback_size = 0;
					softback_top = 0;
				}
			}
		} else {
			if (softback_buf) {
				kfree((void *) softback_buf);
				softback_buf = 0;
				softback_top = 0;
			}
		}
		if (softback_buf)
			softback_in = softback_top = softback_curr =
			    softback_buf;
		softback_lines = 0;
	}

	/* Setup default font */
	if (!p->fontdata) {
		if (!fontname[0] || !(font = find_font(fontname)))
			font = get_default_font(info->var.xres,
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						info->var.yres,
						info->pixmap.blit_x,
						info->pixmap.blit_y);
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		vc->vc_font.width = font->width;
		vc->vc_font.height = font->height;
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		vc->vc_font.data = (void *)(p->fontdata = font->data);
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		vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
	}

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	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;
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	vc_resize(vc, cols, rows);

	DPRINTK("mode:   %s\n", info->fix.id);
	DPRINTK("visual: %d\n", info->fix.visual);
	DPRINTK("res:    %dx%d-%d\n", info->var.xres,
		info->var.yres,
		info->var.bits_per_pixel);

#ifdef CONFIG_ATARI
	if (MACH_IS_ATARI) {
		cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
		irqres =
		    request_irq(IRQ_AUTO_4, fb_vbl_handler,
				IRQ_TYPE_PRIO, "framebuffer vbl",
				info);
	}
#endif				/* CONFIG_ATARI */

#ifdef CONFIG_MAC
	/*
	 * On a Macintoy, the VBL interrupt may or may not be active. 
	 * As interrupt based cursor is more reliable and race free, we 
	 * probe for VBL interrupts.
	 */
	if (MACH_IS_MAC) {
		int ct = 0;
		/*
		 * Probe for VBL: set temp. handler ...
		 */
		irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
				     "framebuffer vbl", info);
		vbl_detected = 0;

		/*
		 * ... and spin for 20 ms ...
		 */
		while (!vbl_detected && ++ct < 1000)
			udelay(20);

		if (ct == 1000)
			printk
			    ("fbcon_startup: No VBL detected, using timer based cursor.\n");

		free_irq(IRQ_MAC_VBL, fb_vbl_detect);

		if (vbl_detected) {
			/*
			 * interrupt based cursor ok
			 */
			cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
			irqres =
			    request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
					"framebuffer vbl", info);
		} else {
			/*
			 * VBL not detected: fall through, use timer based cursor
			 */
			irqres = 1;
		}
	}
#endif				/* CONFIG_MAC */

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	fbcon_add_cursor_timer(info);
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	fbcon_has_exited = 0;
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	return display_desc;
}

static void fbcon_init(struct vc_data *vc, int init)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
	struct fbcon_ops *ops;
	struct vc_data **default_mode = vc->vc_display_fg;
	struct vc_data *svc = *default_mode;
	struct display *t, *p = &fb_display[vc->vc_num];
	int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
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	int cap;
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	if (info_idx == -1 || info == NULL)
	    return;
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	cap = info->flags;

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	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 we are not the first console on this
	   fb, copy the font from that console */
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	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;
			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,
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							info->var.yres,
							info->pixmap.blit_x,
							info->pixmap.blit_y);
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			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 = 256; /* FIXME  Need to
							support more fonts */
		}
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	}
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	if (p->userfont)
		charcnt = FNTCHARCNT(p->fontdata);
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	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
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	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
	if (charcnt == 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->vc_uni_pagedir_loc)
		con_set_default_unimap(svc);
	if (!*vc->vc_uni_pagedir_loc)
		con_copy_unimap(vc, svc);

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	ops = info->fbcon_par;
	p->con_rotate = rotate;
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	set_blitting_type(vc, info);
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	cols = vc->vc_cols;
	rows = vc->vc_rows;
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	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;
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	vc_resize(vc, new_cols, new_rows);

	/*
	 * 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.
	 */
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	if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
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		if (info->fbops->fb_set_par &&
		    !(ops->flags & FBCON_FLAGS_INIT))
			info->fbops->fb_set_par(info);
		ops->flags |= FBCON_FLAGS_INIT;
	}

	ops->graphics = 0;

	if ((cap & FBINFO_HWACCEL_COPYAREA) &&
	    !(cap & FBINFO_HWACCEL_DISABLED))
		p->scrollmode = SCROLL_MOVE;
	else /* default to something safe */
		p->scrollmode = SCROLL_REDRAW;

	/*
	 *  ++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;
	}

	if (logo)
		fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);

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	if (vc == svc && softback_buf)
		fbcon_update_softback(vc);
1208

1209
	if (ops->rotate_font && ops->rotate_font(info, vc)) {
1210
		ops->rotate = FB_ROTATE_UR;
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		set_blitting_type(vc, info);
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	}

1214
	ops->p = &fb_display[fg_console];
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}

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static void fbcon_free_font(struct 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;
}

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static void fbcon_deinit(struct vc_data *vc)
{
	struct display *p = &fb_display[vc->vc_num];
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	struct fb_info *info;
	struct fbcon_ops *ops;
	int idx;
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	fbcon_free_font(p);
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	idx = con2fb_map[vc->vc_num];

	if (idx == -1)
		goto finished;

	info = registered_fb[idx];

	if (!info)
		goto finished;

	ops = info->fbcon_par;

	if (!ops)
		goto finished;

	if (CON_IS_VISIBLE(vc))
		fbcon_del_cursor_timer(info);

	ops->flags &= ~FBCON_FLAGS_INIT;
finished:

	if (!con_is_bound(&fb_con))
		fbcon_exit();

	return;
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}

/* ====================================================================== */

/*  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 = registered_fb[con2fb_map[vc->vc_num]];
	struct fbcon_ops *ops = info->fbcon_par;

	struct display *p = &fb_display[vc->vc_num];
	u_int y_break;

	if (fbcon_is_inactive(vc, info))
		return;

	if (!height || !width)
		return;

	/* 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 = registered_fb[con2fb_map[vc->vc_num]];
	struct 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 = registered_fb[con2fb_map[vc->vc_num]];
	struct fbcon_ops *ops = info->fbcon_par;

	if (!fbcon_is_inactive(vc, info))
		ops->clear_margins(vc, info, bottom_only);
}

static void fbcon_cursor(struct vc_data *vc, int mode)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
	struct fbcon_ops *ops = info->fbcon_par;
	int y;
 	int c = scr_readw((u16 *) vc->vc_pos);

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	if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
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		return;

	ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
	if (mode & CM_SOFTBACK) {
		mode &= ~CM_SOFTBACK;
		y = softback_lines;
	} else {
		if (softback_lines)
			fbcon_set_origin(vc);
		y = 0;
	}

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	ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
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		    get_color(vc, info, c, 0));
	vbl_cursor_cnt = CURSOR_DRAW_DELAY;
}

static int scrollback_phys_max = 0;
static int scrollback_max = 0;
static int scrollback_current = 0;

/*
 * If no vc is existent yet, just set struct display
 */
static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
			      int unit)
{
	struct display *p = &fb_display[unit];
	struct display *t = &fb_display[fg_console];

	if (var_to_display(p, var, info))
		return;

	p->fontdata = t->fontdata;
	p->userfont = t->userfont;
	if (p->userfont)
		REFCOUNT(p->fontdata)++;
}

static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
			   struct vc_data *vc)
{
	struct display *p = &fb_display[vc->vc_num], *t;
	struct vc_data **default_mode = vc->vc_display_fg;
	struct vc_data *svc = *default_mode;
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	struct fbcon_ops *ops = info->fbcon_par;
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	int rows, cols, charcnt = 256;

	if (var_to_display(p, var, info))
		return;
	t = &fb_display[svc->vc_num];
	if (!vc->vc_font.data) {
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		vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
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		vc->vc_font.width = (*default_mode)->vc_font.width;
		vc->vc_font.height = (*default_mode)->vc_font.height;
		p->userfont = t->userfont;
		if (p->userfont)
			REFCOUNT(p->fontdata)++;
	}
	if (p->userfont)
		charcnt = FNTCHARCNT(p->fontdata);

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	var->activate = FB_ACTIVATE_NOW;
	info->var.activate = var->activate;
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	var->yoffset = info->var.yoffset;
	var->xoffset = info->var.xoffset;
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	fb_set_var(info, var);
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	ops->var = info->var;
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	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
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	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
	if (charcnt == 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->vc_uni_pagedir_loc)
		con_set_default_unimap(svc);
	if (!*vc->vc_uni_pagedir_loc)
		con_copy_unimap(vc, svc);

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	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;
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	vc_resize(vc, cols, rows);
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	if (CON_IS_VISIBLE(vc)) {
		update_screen(vc);
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		if (softback_buf)
			fbcon_update_softback(vc);
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	}
}

static __inline__ void ywrap_up(struct vc_data *vc, int count)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
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	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[vc->vc_num];
	
	p->yscroll += count;
	if (p->yscroll >= p->vrows)	/* Deal with wrap */
		p->yscroll -= p->vrows;
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	ops->var.xoffset = 0;
	ops->var.yoffset = p->yscroll * vc->vc_font.height;
	ops->var.vmode |= FB_VMODE_YWRAP;
	ops->update_start(info);
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	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 = registered_fb[con2fb_map[vc->vc_num]];
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	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[vc->vc_num];
	
	p->yscroll -= count;
	if (p->yscroll < 0)	/* Deal with wrap */
		p->yscroll += p->vrows;
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	ops->var.xoffset = 0;
	ops->var.yoffset = p->yscroll * vc->vc_font.height;
	ops->var.vmode |= FB_VMODE_YWRAP;
	ops->update_start(info);
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	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 = registered_fb[con2fb_map[vc->vc_num]];
	struct 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;
	}
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	ops->var.xoffset = 0;
	ops->var.yoffset = p->yscroll * vc->vc_font.height;
	ops->var.vmode &= ~FB_VMODE_YWRAP;
	ops->update_start(info);
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	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 = registered_fb[con2fb_map[vc->vc_num]];
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	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[vc->vc_num];

	p->yscroll += count;
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	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);
1519
	}
1520 1521 1522 1523 1524

	ops->var.xoffset = 0;
	ops->var.yoffset = p->yscroll * vc->vc_font.height;
	ops->var.vmode &= ~FB_VMODE_YWRAP;
	ops->update_start(info);
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	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 = registered_fb[con2fb_map[vc->vc_num]];
	struct 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;
	}
1544 1545 1546 1547 1548

	ops->var.xoffset = 0;
	ops->var.yoffset = p->yscroll * vc->vc_font.height;
	ops->var.vmode &= ~FB_VMODE_YWRAP;
	ops->update_start(info);
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	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 = registered_fb[con2fb_map[vc->vc_num]];
1559
	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[vc->vc_num];

	p->yscroll -= count;
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	if (p->yscroll < 0) {
		p->yscroll += p->vrows - vc->vc_rows;
		fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1567
	}
1568 1569 1570 1571 1572

	ops->var.xoffset = 0;
	ops->var.yoffset = p->yscroll * vc->vc_font.height;
	ops->var.vmode &= ~FB_VMODE_YWRAP;
	ops->update_start(info);
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	fbcon_clear_margins(vc, 1);
	scrollback_max -= count;
	if (scrollback_max < 0)
		scrollback_max = 0;
	scrollback_current = 0;
}

static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
				  long delta)
{
	int count = vc->vc_rows;
	unsigned short *d, *s;
	unsigned long n;
	int line = 0;

	d = (u16 *) softback_curr;
	if (d == (u16 *) softback_in)
		d = (u16 *) vc->vc_origin;
	n = softback_curr + delta * vc->vc_size_row;
	softback_lines -= delta;
	if (delta < 0) {
		if (softback_curr < softback_top && n < softback_buf) {
			n += softback_end - softback_buf;
			if (n < softback_top) {
				softback_lines -=
				    (softback_top - n) / vc->vc_size_row;
				n = softback_top;
			}
		} else if (softback_curr >= softback_top
			   && n < softback_top) {
			softback_lines -=
			    (softback_top - n) / vc->vc_size_row;
			n = softback_top;
		}
	} else {
		if (softback_curr > softback_in && n >= softback_end) {
			n += softback_buf - softback_end;
			if (n > softback_in) {
				n = softback_in;
				softback_lines = 0;
			}
		} else if (softback_curr <= softback_in && n > softback_in) {
			n = softback_in;
			softback_lines = 0;
		}
	}
	if (n == softback_curr)
		return;
	softback_curr = n;
	s = (u16 *) softback_curr;
	if (s == (u16 *) softback_in)
		s = (u16 *) vc->vc_origin;
	while (count--) {
		unsigned short *start;
		unsigned short *le;
		unsigned short c;
		int x = 0;
		unsigned short attr = 1;

		start = s;
		le = advance_row(s, 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++;
				}
			}
			s++;
			d++;
		} while (s < le);
		if (s > start)
			fbcon_putcs(vc, start, s - start, line, x);
		line++;
		if (d == (u16 *) softback_end)
			d = (u16 *) softback_buf;
		if (d == (u16 *) softback_in)
			d = (u16 *) vc->vc_origin;
		if (s == (u16 *) softback_end)
			s = (u16 *) softback_buf;
		if (s == (u16 *) softback_in)
			s = (u16 *) vc->vc_origin;
	}
}

static void fbcon_redraw_move(struct vc_data *vc, struct 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(struct vc_data *vc, struct 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 inline void fbcon_softback_note(struct vc_data *vc, int t,
				       int count)
{
	unsigned short *p;

	if (vc->vc_num != fg_console)
		return;
	p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);

	while (count) {
		scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
		count--;
		p = advance_row(p, 1);
		softback_in += vc->vc_size_row;
		if (softback_in == softback_end)
			softback_in = softback_buf;
		if (softback_in == softback_top) {
			softback_top += vc->vc_size_row;
			if (softback_top == softback_end)
				softback_top = softback_buf;
		}
	}
	softback_curr = softback_in;
}

static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
			int count)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
	struct display *p = &fb_display[vc->vc_num];
	struct fbcon_ops *ops = info->fbcon_par;
	int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;

	if (fbcon_is_inactive(vc, info))
		return -EINVAL;

	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;
		if (softback_top)
			fbcon_softback_note(vc, t, count);
		if (logo_shown >= 0)
			goto redraw_up;
		switch (p->scrollmode) {
		case SCROLL_MOVE:
			ops->bmove(vc, info, t + count, 0, t, 0,
				    b - t - count, vc->vc_cols);
			ops->clear(vc, info, b - count, 0, count,
				  vc->vc_cols);
			break;

		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)
1851
					fbcon_redraw_move(vc, p, b,
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							  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 1;
		}
		break;

	case SM_DOWN:
		if (count > vc->vc_rows)	/* Maximum realistic size */
			count = vc->vc_rows;
1898 1899
		if (logo_shown >= 0)
			goto redraw_down;
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		switch (p->scrollmode) {
		case SCROLL_MOVE:
			ops->bmove(vc, info, t, 0, t + count, 0,
				    b - t - count, vc->vc_cols);
			ops->clear(vc, info, t, 0, count, vc->vc_cols);
			break;

		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 1;
		}
	}
	return 0;
}


static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
			int height, int width)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
	struct 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 void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx, 
			    int dy, int dx, int height, int width, u_int y_break)
{
	struct fb_info *info = registered_fb[con2fb_map[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);
}

2046 2047
static __inline__ void updatescrollmode(struct display *p,
					struct fb_info *info,
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					struct vc_data *vc)
{
2050
	struct fbcon_ops *ops = info->fbcon_par;
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	int fh = vc->vc_font.height;
	int cap = info->flags;
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063
	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) &&
2064 2065
		divides(vc->vc_font.height, vyres) &&
		divides(vc->vc_font.height, yres);
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	int reading_fast = cap & FBINFO_READS_FAST;
2067 2068 2069 2070 2071 2072 2073 2074 2075
	int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
		!(cap & FBINFO_HWACCEL_DISABLED);
	int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
		!(cap & FBINFO_HWACCEL_DISABLED);

	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))
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		p->vrows--;

	if (good_wrap || good_pan) {
		if (reading_fast || fast_copyarea)
2080 2081
			p->scrollmode = good_wrap ?
				SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
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		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;
	}
}

static int fbcon_resize(struct vc_data *vc, unsigned int width, 
			unsigned int height)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2097
	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[vc->vc_num];
	struct fb_var_screeninfo var = info->var;
2100 2101 2102 2103 2104 2105 2106 2107 2108 2109
	int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;

	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;
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	x_diff = info->var.xres - var.xres;
	y_diff = info->var.yres - var.yres;
2112 2113
	if (x_diff < 0 || x_diff > virt_fw ||
	    y_diff < 0 || y_diff > virt_fh) {
2114
		const struct fb_videomode *mode;
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		DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
		mode = fb_find_best_mode(&var, &info->modelist);
		if (mode == NULL)
			return -EINVAL;
2120
		display_to_var(&var, p);
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		fb_videomode_to_var(&var, mode);
2122

2123
		if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
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			return -EINVAL;

		DPRINTK("resize now %ix%i\n", var.xres, var.yres);
		if (CON_IS_VISIBLE(vc)) {
			var.activate = FB_ACTIVATE_NOW |
				FB_ACTIVATE_FORCE;
			fb_set_var(info, &var);
		}
		var_to_display(p, &info->var, info);
2133
		ops->var = info->var;
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	}
	updatescrollmode(p, info, vc);
	return 0;
}

static int fbcon_switch(struct vc_data *vc)
{
2141
	struct fb_info *info, *old_info = NULL;
2142
	struct fbcon_ops *ops;
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	struct display *p = &fb_display[vc->vc_num];
	struct fb_var_screeninfo var;
2145
	int i, prev_console, charcnt = 256;
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	info = registered_fb[con2fb_map[vc->vc_num]];
2148
	ops = info->fbcon_par;
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	if (softback_top) {
		if (softback_lines)
			fbcon_set_origin(vc);
		softback_top = softback_curr = softback_in = softback_buf;
		softback_lines = 0;
2155
		fbcon_update_softback(vc);
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	}

	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;
	}

2167
	prev_console = ops->currcon;
2168 2169
	if (prev_console != -1)
		old_info = registered_fb[con2fb_map[prev_console]];
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	/*
	 * 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;
	 */
	for (i = 0; i < FB_MAX; i++) {
		if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2180
			struct fbcon_ops *o = registered_fb[i]->fbcon_par;
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			o->currcon = vc->vc_num;
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		}
	}
	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;
2194 2195 2196
	var.yoffset = info->var.yoffset;
	var.xoffset = info->var.xoffset;
	var.vmode = info->var.vmode;
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	fb_set_var(info, &var);
2198
	ops->var = info->var;
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2200 2201
	if (old_info != NULL && (old_info != info ||
				 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2202 2203
		if (info->fbops->fb_set_par)
			info->fbops->fb_set_par(info);
2204

2205
		if (old_info != info)
2206
			fbcon_del_cursor_timer(old_info);
2207
	}
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2209 2210 2211 2212 2213 2214
	if (fbcon_is_inactive(vc, info) ||
	    ops->blank_state != FB_BLANK_UNBLANK)
		fbcon_del_cursor_timer(info);
	else
		fbcon_add_cursor_timer(info);

2215
	set_blitting_type(vc, info);
2216 2217
	ops->cursor_reset = 1;

2218
	if (ops->rotate_font && ops->rotate_font(info, vc)) {
2219
		ops->rotate = FB_ROTATE_UR;
2220
		set_blitting_type(vc, info);
2221
	}
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2223
	vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
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	vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2225 2226 2227 2228 2229 2230 2231

	if (p->userfont)
		charcnt = FNTCHARCNT(vc->vc_font.data);

	if (charcnt > 256)
		vc->vc_complement_mask <<= 1;

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	updatescrollmode(p, info, vc);

	switch (p->scrollmode) {
	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;
	}
2248

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	scrollback_max = 0;
	scrollback_current = 0;
2251 2252 2253 2254 2255 2256

	if (!fbcon_is_inactive(vc, info)) {
	    ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
	    ops->update_start(info);
	}

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	fbcon_set_palette(vc, color_table); 	
	fbcon_clear_margins(vc, 0);

	if (logo_shown == FBCON_LOGO_DRAW) {

		logo_shown = fg_console;
		/* This is protected above by initmem_freed */
2264
		fb_show_logo(info, ops->rotate);
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		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)
{
2277 2278
	struct fb_event event;

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	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;
	}
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	event.info = info;
	event.data = &blank;
	fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
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}

static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
{
	struct fb_info *info = registered_fb[con2fb_map[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) {
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			if (info->fbops->fb_save_state)
				info->fbops->fb_save_state(info);
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			var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
			fb_set_var(info, &var);
			ops->graphics = 0;
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			ops->var = info->var;
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		} else if (info->fbops->fb_restore_state)
			info->fbops->fb_restore_state(info);
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	}

 	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);
		}

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		if (!blank)
			update_screen(vc);
	}

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	if (fbcon_is_inactive(vc, info) ||
	    ops->blank_state != FB_BLANK_UNBLANK)
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		fbcon_del_cursor_timer(info);
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	else
		fbcon_add_cursor_timer(info);
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	return 0;
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}

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;
		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;
		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) {
		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;
		for (i = 0; i < font->charcount; i++) {
			memcpy(data, fontdata, j);
			memset(data + j, 0, 128 - j);
			data += 128;
			fontdata += j;
		}
	}
	return 0;
}

static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
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			     const u8 * data, int userfont)
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{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
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	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[vc->vc_num];
	int resize;
	int cnt;
	char *old_data = NULL;

	if (CON_IS_VISIBLE(vc) && softback_lines)
		fbcon_set_origin(vc);

	resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
	if (p->userfont)
		old_data = vc->vc_font.data;
	if (userfont)
		cnt = FNTCHARCNT(data);
	else
		cnt = 256;
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	vc->vc_font.data = (void *)(p->fontdata = data);
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	if ((p->userfont = userfont))
		REFCOUNT(data)++;
	vc->vc_font.width = w;
	vc->vc_font.height = h;
	if (vc->vc_hi_font_mask && cnt == 256) {
		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 if (!vc->vc_hi_font_mask && cnt == 512) {
		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;
		}

	}

	if (resize) {
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		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;
		vc_resize(vc, cols, rows);
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		if (CON_IS_VISIBLE(vc) && softback_buf)
			fbcon_update_softback(vc);
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	} 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;
}

static int fbcon_copy_font(struct vc_data *vc, int con)
{
	struct display *od = &fb_display[con];
	struct console_font *f = &vc->vc_font;

	if (od->fontdata == f->data)
		return 0;	/* already the same font... */
	return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
}

/*
 *  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 flags)
{
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	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
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	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 = (font->width+7) >> 3;

	/* 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;

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	/* Make sure drawing engine can handle the font */
	if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
	    !(info->pixmap.blit_y & (1 << (font->height - 1))))
		return -EINVAL;
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	/* Make sure driver can handle the font length */
	if (fbcon_invalid_charcount(info, charcount))
		return -EINVAL;
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	size = h * pitch * charcount;

	new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);

	if (!new_data)
		return -ENOMEM;

	new_data += FONT_EXTRA_WORDS * sizeof(int);
	FNTSIZE(new_data) = size;
	FNTCHARCNT(new_data) = charcount;
	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 */
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	for (i = first_fb_vc; i <= last_fb_vc; i++) {
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		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));
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			new_data = (u8 *)fb_display[i].fontdata;
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			break;
		}
	}
	return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
}

static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
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	const struct font_desc *f;
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	if (!name)
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		f = get_default_font(info->var.xres, info->var.yres,
				     info->pixmap.blit_x, info->pixmap.blit_y);
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	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->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 int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
{
	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
	int i, j, k, depth;
	u8 val;

	if (fbcon_is_inactive(vc, info))
		return -EINVAL;

	if (!CON_IS_VISIBLE(vc))
		return 0;

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	depth = fb_get_color_depth(&info->var, &info->fix);
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	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);

	return fb_set_cmap(&palette_cmap, info);
}

static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
{
	unsigned long p;
	int line;
	
	if (vc->vc_num != fg_console || !softback_lines)
		return (u16 *) (vc->vc_origin + offset);
	line = offset / vc->vc_size_row;
	if (line >= softback_lines)
		return (u16 *) (vc->vc_origin + offset -
				softback_lines * vc->vc_size_row);
	p = softback_curr + offset;
	if (p >= softback_end)
		p += softback_buf - softback_end;
	return (u16 *) p;
}

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;
		if (vc->vc_num == fg_console)
			y += softback_lines;
		ret = pos + (vc->vc_cols - x) * 2;
	} else if (vc->vc_num == fg_console && softback_lines) {
		unsigned long offset = pos - softback_curr;

		if (pos < softback_curr)
			offset += softback_end - softback_buf;
		offset /= 2;
		x = offset % vc->vc_cols;
		y = offset / vc->vc_cols;
		ret = pos + (vc->vc_cols - x) * 2;
		if (ret == softback_end)
			ret = softback_buf;
		if (ret == softback_in)
			ret = vc->vc_origin;
	} 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++);
		if (p == (u16 *) softback_end)
			p = (u16 *) softback_buf;
		if (p == (u16 *) softback_in)
			p = (u16 *) vc->vc_origin;
	}
}

static int fbcon_scrolldelta(struct vc_data *vc, int lines)
{
	struct fb_info *info = registered_fb[con2fb_map[fg_console]];
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	struct fbcon_ops *ops = info->fbcon_par;
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	struct display *p = &fb_display[fg_console];
	int offset, limit, scrollback_old;

	if (softback_top) {
		if (vc->vc_num != fg_console)
			return 0;
		if (vc->vc_mode != KD_TEXT || !lines)
			return 0;
		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;
			if (logo_shown == vc->vc_num) {
				unsigned long p, q;
				int i;

				p = softback_in;
				q = vc->vc_origin +
				    logo_lines * vc->vc_size_row;
				for (i = 0; i < logo_lines; i++) {
					if (p == softback_top)
						break;
					if (p == softback_buf)
						p = softback_end;
					p -= vc->vc_size_row;
					q -= vc->vc_size_row;
					scr_memcpyw((u16 *) q, (u16 *) p,
						    vc->vc_size_row);
				}
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				softback_in = softback_curr = p;
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				update_region(vc, vc->vc_origin,
					      logo_lines * vc->vc_cols);
			}
			logo_shown = FBCON_LOGO_CANSHOW;
		}
		fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
		fbcon_redraw_softback(vc, p, lines);
		fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
		return 0;
	}

	if (!scrollback_phys_max)
		return -ENOSYS;

	scrollback_old = scrollback_current;
	scrollback_current -= lines;
	if (scrollback_current < 0)
		scrollback_current = 0;
	else if (scrollback_current > scrollback_max)
		scrollback_current = scrollback_max;
	if (scrollback_current == scrollback_old)
		return 0;

	if (fbcon_is_inactive(vc, info))
		return 0;

	fbcon_cursor(vc, CM_ERASE);

	offset = p->yscroll - scrollback_current;
	limit = p->vrows;
	switch (p->scrollmode) {
	case SCROLL_WRAP_MOVE:
		info->var.vmode |= FB_VMODE_YWRAP;
		break;
	case SCROLL_PAN_MOVE:
	case SCROLL_PAN_REDRAW:
		limit -= vc->vc_rows;
		info->var.vmode &= ~FB_VMODE_YWRAP;
		break;
	}
	if (offset < 0)
		offset += limit;
	else if (offset >= limit)
		offset -= limit;
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	ops->var.xoffset = 0;
	ops->var.yoffset = offset * vc->vc_font.height;
	ops->update_start(info);

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	if (!scrollback_current)
		fbcon_cursor(vc, CM_DRAW);
	return 0;
}

static int fbcon_set_origin(struct vc_data *vc)
{
	if (softback_lines)
		fbcon_scrolldelta(vc, softback_lines);
	return 0;
}

static 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);
}

static 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 display *p;
	int rows, cols;

	if (!ops || ops->currcon < 0)
		return;
	vc = vc_cons[ops->currcon].d;
2849 2850
	if (vc->vc_mode != KD_TEXT ||
	    registered_fb[con2fb_map[ops->currcon]] != info)
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		return;

	p = &fb_display[vc->vc_num];
2854
	set_blitting_type(vc, info);
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	if (CON_IS_VISIBLE(vc)) {
		var_to_display(p, &info->var, info);
2858 2859 2860 2861
		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;
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		vc_resize(vc, cols, rows);
		updatescrollmode(p, info, vc);
		scrollback_max = 0;
		scrollback_current = 0;
2866 2867 2868 2869 2870 2871

		if (!fbcon_is_inactive(vc, info)) {
		    ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
		    ops->update_start(info);
		}

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		fbcon_set_palette(vc, color_table);
		update_screen(vc);
2874 2875
		if (softback_buf)
			fbcon_update_softback(vc);
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	}
}

2879 2880 2881 2882 2883
static void fbcon_set_all_vcs(struct fb_info *info)
{
	struct fbcon_ops *ops = info->fbcon_par;
	struct vc_data *vc;
	struct display *p;
2884
	int i, rows, cols, fg = -1;
2885 2886 2887 2888

	if (!ops || ops->currcon < 0)
		return;

2889
	for (i = first_fb_vc; i <= last_fb_vc; i++) {
2890 2891 2892 2893 2894
		vc = vc_cons[i].d;
		if (!vc || vc->vc_mode != KD_TEXT ||
		    registered_fb[con2fb_map[i]] != info)
			continue;

2895 2896 2897 2898 2899
		if (CON_IS_VISIBLE(vc)) {
			fg = i;
			continue;
		}

2900
		p = &fb_display[vc->vc_num];
2901
		set_blitting_type(vc, info);
2902
		var_to_display(p, &info->var, info);
2903 2904
		cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
		rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2905 2906
		cols /= vc->vc_font.width;
		rows /= vc->vc_font.height;
2907 2908
		vc_resize(vc, cols, rows);
	}
2909

2910 2911
	if (fg != -1)
		fbcon_modechanged(info);
2912 2913
}

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static int fbcon_mode_deleted(struct fb_info *info,
			      struct fb_videomode *mode)
{
	struct fb_info *fb_info;
	struct 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 = 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;
}

2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972
static int fbcon_fb_unregistered(int idx)
{
	int i;

	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;

		for (i = 0; i < FB_MAX; i++) {
			if (registered_fb[i] != NULL) {
				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 (!num_registered_fb)
		unregister_con_driver(&fb_con);

	return 0;
}

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static int fbcon_fb_registered(int idx)
{
	int ret = 0, i;

	if (info_idx == -1) {
2978
		for (i = first_fb_vc; i <= last_fb_vc; i++) {
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			if (con2fb_map_boot[i] == idx) {
				info_idx = idx;
				break;
			}
		}
2984

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		if (info_idx != -1)
			ret = fbcon_takeover(1);
	} else {
2988
		for (i = first_fb_vc; i <= last_fb_vc; i++) {
2989 2990
			if (con2fb_map_boot[i] == idx &&
			    con2fb_map[i] == -1)
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2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024
				set_con2fb_map(i, idx, 0);
		}
	}

	return ret;
}

static 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 ||
			registered_fb[con2fb_map[ops->currcon]] != info)
		return;

	if (CON_IS_VISIBLE(vc)) {
		if (blank)
			do_blank_screen(0);
		else
			do_unblank_screen(0);
	}
	ops->blank_state = blank;
}

static void fbcon_new_modelist(struct fb_info *info)
{
	int i;
	struct vc_data *vc;
	struct fb_var_screeninfo var;
3025
	const struct fb_videomode *mode;
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3026

3027
	for (i = first_fb_vc; i <= last_fb_vc; i++) {
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3028 3029 3030 3031 3032 3033
		if (registered_fb[con2fb_map[i]] != info)
			continue;
		if (!fb_display[i].mode)
			continue;
		vc = vc_cons[i].d;
		display_to_var(&var, &fb_display[i]);
3034 3035
		mode = fb_find_nearest_mode(fb_display[i].mode,
					    &info->modelist);
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3036 3037 3038 3039 3040 3041 3042 3043 3044 3045
		fb_videomode_to_var(&var, mode);

		if (vc)
			fbcon_set_disp(info, &var, vc);
		else
			fbcon_preset_disp(info, &var, i);

	}
}

3046 3047 3048 3049 3050 3051 3052 3053 3054 3055 3056 3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082
static void fbcon_get_requirement(struct fb_info *info,
				  struct fb_blit_caps *caps)
{
	struct vc_data *vc;
	struct display *p;
	int charcnt;

	if (caps->flags) {
		int i;

		for (i = first_fb_vc; i <= last_fb_vc; i++) {
			vc = vc_cons[i].d;
			if (vc && vc->vc_mode == KD_TEXT) {
				p = &fb_display[i];
				caps->x |= 1 << (vc->vc_font.width - 1);
				caps->y |= 1 << (vc->vc_font.height - 1);
				charcnt = (p->userfont) ?
					FNTCHARCNT(p->fontdata) : 256;
				if (caps->len < charcnt)
					caps->len = charcnt;
			}
		}
	} else {
		vc = vc_cons[fg_console].d;

		if (vc && vc->vc_mode == KD_TEXT) {
			p = &fb_display[fg_console];
			caps->x |= 1 << (vc->vc_font.width - 1);
			caps->y |= 1 << (vc->vc_font.height - 1);
			charcnt = (p->userfont) ?
				FNTCHARCNT(p->fontdata) : 256;
			if (caps->len < charcnt)
				caps->len = charcnt;
		}
	}
}

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static int fbcon_event_notify(struct notifier_block *self, 
			      unsigned long action, void *data)
{
	struct fb_event *event = data;
	struct fb_info *info = event->info;
	struct fb_videomode *mode;
	struct fb_con2fbmap *con2fb;
3090
	struct fb_blit_caps *caps;
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	int ret = 0;

3093 3094 3095 3096 3097 3098 3099 3100
	/*
	 * ignore all events except driver registration and deregistration
	 * if fbcon is not active
	 */
	if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
				  action == FB_EVENT_FB_UNREGISTERED))
		goto done;

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3101 3102 3103 3104 3105 3106 3107 3108 3109 3110
	switch(action) {
	case FB_EVENT_SUSPEND:
		fbcon_suspended(info);
		break;
	case FB_EVENT_RESUME:
		fbcon_resumed(info);
		break;
	case FB_EVENT_MODE_CHANGE:
		fbcon_modechanged(info);
		break;
3111 3112 3113
	case FB_EVENT_MODE_CHANGE_ALL:
		fbcon_set_all_vcs(info);
		break;
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3114 3115 3116 3117 3118 3119 3120
	case FB_EVENT_MODE_DELETE:
		mode = event->data;
		ret = fbcon_mode_deleted(info, mode);
		break;
	case FB_EVENT_FB_REGISTERED:
		ret = fbcon_fb_registered(info->node);
		break;
3121 3122 3123
	case FB_EVENT_FB_UNREGISTERED:
		ret = fbcon_fb_unregistered(info->node);
		break;
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3124 3125 3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138
	case FB_EVENT_SET_CONSOLE_MAP:
		con2fb = event->data;
		ret = set_con2fb_map(con2fb->console - 1,
				     con2fb->framebuffer, 1);
		break;
	case FB_EVENT_GET_CONSOLE_MAP:
		con2fb = event->data;
		con2fb->framebuffer = con2fb_map[con2fb->console - 1];
		break;
	case FB_EVENT_BLANK:
		fbcon_fb_blanked(info, *(int *)event->data);
		break;
	case FB_EVENT_NEW_MODELIST:
		fbcon_new_modelist(info);
		break;
3139 3140 3141 3142
	case FB_EVENT_GET_REQ:
		caps = event->data;
		fbcon_get_requirement(info, caps);
		break;
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3143 3144
	}

3145
done:
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3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182
	return ret;
}

/*
 *  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_bmove 		= fbcon_bmove,
	.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_font_copy 		= fbcon_copy_font,
	.con_set_palette 	= fbcon_set_palette,
	.con_scrolldelta 	= fbcon_scrolldelta,
	.con_set_origin 	= fbcon_set_origin,
	.con_invert_region 	= fbcon_invert_region,
	.con_screen_pos 	= fbcon_screen_pos,
	.con_getxy 		= fbcon_getxy,
	.con_resize             = fbcon_resize,
};

static struct notifier_block fbcon_event_notifier = {
	.notifier_call	= fbcon_event_notify,
};

3183 3184 3185 3186 3187 3188 3189
static ssize_t store_rotate(struct class_device *class_device,
			    const char *buf, size_t count)
{
	struct fb_info *info;
	int rotate, idx;
	char **last = NULL;

3190 3191 3192
	if (fbcon_has_exited)
		return count;

3193 3194 3195 3196 3197 3198 3199 3200 3201 3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213
	acquire_console_sem();
	idx = con2fb_map[fg_console];

	if (idx == -1 || registered_fb[idx] == NULL)
		goto err;

	info = registered_fb[idx];
	rotate = simple_strtoul(buf, last, 0);
	fbcon_rotate(info, rotate);
err:
	release_console_sem();
	return count;
}

static ssize_t store_rotate_all(struct class_device *class_device,
				const char *buf, size_t count)
{
	struct fb_info *info;
	int rotate, idx;
	char **last = NULL;

3214 3215 3216
	if (fbcon_has_exited)
		return count;

3217 3218 3219 3220 3221 3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232 3233 3234 3235
	acquire_console_sem();
	idx = con2fb_map[fg_console];

	if (idx == -1 || registered_fb[idx] == NULL)
		goto err;

	info = registered_fb[idx];
	rotate = simple_strtoul(buf, last, 0);
	fbcon_rotate_all(info, rotate);
err:
	release_console_sem();
	return count;
}

static ssize_t show_rotate(struct class_device *class_device, char *buf)
{
	struct fb_info *info;
	int rotate = 0, idx;

3236 3237 3238
	if (fbcon_has_exited)
		return 0;

3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258
	acquire_console_sem();
	idx = con2fb_map[fg_console];

	if (idx == -1 || registered_fb[idx] == NULL)
		goto err;

	info = registered_fb[idx];
	rotate = fbcon_get_rotate(info);
err:
	release_console_sem();
	return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
}

static struct class_device_attribute class_device_attrs[] = {
	__ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
	__ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
};

static int fbcon_init_class_device(void)
{
3259 3260 3261 3262 3263 3264 3265 3266 3267 3268 3269 3270 3271 3272 3273 3274 3275 3276 3277
	int i, error = 0;

	fbcon_has_sysfs = 1;

	for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
		error = class_device_create_file(fbcon_class_device,
						 &class_device_attrs[i]);

		if (error)
			break;
	}

	if (error) {
		while (--i >= 0)
			class_device_remove_file(fbcon_class_device,
						 &class_device_attrs[i]);

		fbcon_has_sysfs = 0;
	}
3278 3279 3280 3281

	return 0;
}

3282
static void fbcon_start(void)
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3283
{
3284 3285
	if (num_registered_fb) {
		int i;
3286

3287
		acquire_console_sem();
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3288 3289 3290 3291 3292 3293 3294

		for (i = 0; i < FB_MAX; i++) {
			if (registered_fb[i] != NULL) {
				info_idx = i;
				break;
			}
		}
3295 3296

		release_console_sem();
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3297 3298
		fbcon_takeover(0);
	}
3299 3300
}

3301
static void fbcon_exit(void)
3302
{
3303 3304 3305
	struct fb_info *info;
	int i, j, mapped;

3306 3307 3308
	if (fbcon_has_exited)
		return;

3309
#ifdef CONFIG_ATARI
3310
	free_irq(IRQ_AUTO_4, fb_vbl_handler);
3311 3312 3313
#endif
#ifdef CONFIG_MAC
	if (MACH_IS_MAC && vbl_detected)
3314
		free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3315 3316 3317
#endif

	kfree((void *)softback_buf);
3318
	softback_buf = 0UL;
3319 3320 3321 3322 3323 3324 3325 3326

	for (i = 0; i < FB_MAX; i++) {
		mapped = 0;
		info = registered_fb[i];

		if (info == NULL)
			continue;

3327 3328
		for (j = first_fb_vc; j <= last_fb_vc; j++) {
			if (con2fb_map[j] == i)
3329 3330 3331 3332 3333 3334 3335
				mapped = 1;
		}

		if (mapped) {
			if (info->fbops->fb_release)
				info->fbops->fb_release(info, 0);
			module_put(info->fbops->owner);
3336 3337

			if (info->fbcon_par) {
3338 3339
				struct fbcon_ops *ops = info->fbcon_par;

3340
				fbcon_del_cursor_timer(info);
3341
				kfree(ops->cursor_src);
3342 3343 3344 3345 3346 3347
				kfree(info->fbcon_par);
				info->fbcon_par = NULL;
			}

			if (info->queue.func == fb_flashcursor)
				info->queue.func = NULL;
3348 3349 3350
		}
	}

3351
	fbcon_has_exited = 1;
3352 3353 3354 3355 3356 3357 3358 3359 3360
}

static int __init fb_console_init(void)
{
	int i;

	acquire_console_sem();
	fb_register_client(&fbcon_event_notifier);
	fbcon_class_device =
3361
	    class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3362 3363 3364 3365 3366 3367 3368 3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382

	if (IS_ERR(fbcon_class_device)) {
		printk(KERN_WARNING "Unable to create class_device "
		       "for fbcon; errno = %ld\n",
		       PTR_ERR(fbcon_class_device));
		fbcon_class_device = NULL;
	} else
		fbcon_init_class_device();

	for (i = 0; i < MAX_NR_CONSOLES; i++)
		con2fb_map[i] = -1;

	release_console_sem();
	fbcon_start();
	return 0;
}

module_init(fb_console_init);

#ifdef MODULE

3383
static void __exit fbcon_deinit_class_device(void)
3384 3385 3386
{
	int i;

3387 3388 3389 3390 3391 3392 3393
	if (fbcon_has_sysfs) {
		for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
			class_device_remove_file(fbcon_class_device,
						 &class_device_attrs[i]);

		fbcon_has_sysfs = 0;
	}
3394 3395
}

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3396 3397 3398 3399
static void __exit fb_console_exit(void)
{
	acquire_console_sem();
	fb_unregister_client(&fbcon_event_notifier);
3400
	fbcon_deinit_class_device();
3401
	class_device_destroy(fb_class, MKDEV(0, 0));
3402
	fbcon_exit();
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3403
	release_console_sem();
3404
	unregister_con_driver(&fb_con);
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3405 3406 3407 3408 3409 3410 3411
}	

module_exit(fb_console_exit);

#endif

MODULE_LICENSE("GPL");