Upgrade to 2.1.73.

2 files changed, 0 insertions, 3340 deletions

diff --git a/arch/m68k/atari/atafb.c b/arch/m68k/atari/atafb.c
deleted file mode 100644
index efa6fc8b8..000000000
--- a/arch/m68k/atari/atafb.c
+++ /dev/null
@@ -1,3292 +0,0 @@
-/*
- * atari/atafb.c -- Low level implementation of Atari frame buffer device
- *
- *  Copyright (C) 1994 Martin Schaller & Roman Hodek
- *  
- * 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.
- *
- * History:
- *   - 03 Jan 95: Original version by Martin Schaller: The TT driver and
- *                all the device independent stuff
- *   - 09 Jan 95: Roman: I've added the hardware abstraction (hw_switch)
- *                and wrote the Falcon, ST(E), and External drivers
- *                based on the original TT driver.
- *   - 07 May 95: Martin: Added colormap operations for the external driver
- *   - 21 May 95: Martin: Added support for overscan
- *		  Andreas: some bug fixes for this
- *   -    Jul 95: Guenther Kelleter <guenther@pool.informatik.rwth-aachen.de>:
- *                Programmable Falcon video modes
- *                (thanks to Christian Cartus for documentation
- *                of VIDEL registers).
- *   - 27 Dec 95: Guenther: Implemented user definable video modes "user[0-7]"
- *                on minor 24...31. "user0" may be set on commandline by
- *                "R<x>;<y>;<depth>". (Makes sense only on Falcon)
- *                Video mode switch on Falcon now done at next VBL interrupt
- *                to avoid the annoying right shift of the screen.
- *
- *
- * To do:
- *   - For the Falcon it is not possible to set random video modes on
- *     SM124 and SC/TV, only the bootup resolution is supported.
- *
- */
-
-#define ATAFB_TT
-#define ATAFB_STE
-#define ATAFB_EXT
-#define ATAFB_FALCON
-
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/tty.h>
-#include <linux/malloc.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-
-#include <asm/setup.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
-
-#include <asm/atarihw.h>
-#include <asm/atariints.h>
-
-#include <linux/fb.h>
-#include <asm/atarikb.h>
-
-#define SWITCH_ACIA 0x01		/* modes for switch on OverScan */
-#define SWITCH_SND6 0x40
-#define SWITCH_SND7 0x80
-#define SWITCH_NONE 0x00
-
-
-#define arraysize(x)			(sizeof(x)/sizeof(*(x)))
-
-#define up(x, r) (((x) + (r) - 1) & ~((r)-1))
-
-
-static int default_par=0;	/* default resolution (0=none) */
-
-static int node;		/* node of the /dev/fb?current file */
-
-static unsigned long default_mem_req=0;
-
-static int hwscroll=-1;
-
-static int use_hwscroll = 1;
-
-static int sttt_xres=640,st_yres=400,tt_yres=480;
-static int sttt_xres_virtual=640,sttt_yres_virtual=400;
-static int ovsc_offset=0, ovsc_addlen=0;
-int        ovsc_switchmode=0;
-
-static struct atari_fb_par {
-	unsigned long screen_base;
-	int yres_virtual;
-	union {
-		struct {
-			int mode;
-			int sync;
-		} tt, st;
-		struct falcon_hw {
-			/* Here are fields for storing a video mode, as direct
-			 * parameters for the hardware.
-			 */
-			short sync;
-			short line_width;
-			short line_offset;
-			short st_shift;
-			short f_shift;
-			short vid_control;
-			short vid_mode;
-			short xoffset;
-			short hht, hbb, hbe, hdb, hde, hss;
-			short vft, vbb, vbe, vdb, vde, vss;
-			/* auxiliary information */
-			short mono;
-			short ste_mode;
-			short bpp;
-		} falcon;
-		/* Nothing needed for external mode */
-	} hw;
-} current_par;
-
-/* Don't calculate an own resolution, and thus don't change the one found when
- * booting (currently used for the Falcon to keep settings for internal video
- * hardware extensions (e.g. ScreenBlaster)  */
-static int DontCalcRes = 0; 
-
-#define HHT hw.falcon.hht
-#define HBB hw.falcon.hbb
-#define HBE hw.falcon.hbe
-#define HDB hw.falcon.hdb
-#define HDE hw.falcon.hde
-#define HSS hw.falcon.hss
-#define VFT hw.falcon.vft
-#define VBB hw.falcon.vbb
-#define VBE hw.falcon.vbe
-#define VDB hw.falcon.vdb
-#define VDE hw.falcon.vde
-#define VSS hw.falcon.vss
-#define VCO_CLOCK25		0x04
-#define VCO_CSYPOS		0x10
-#define VCO_VSYPOS		0x20
-#define VCO_HSYPOS		0x40
-#define VCO_SHORTOFFS	0x100
-#define VMO_DOUBLE		0x01
-#define VMO_INTER		0x02
-#define VMO_PREMASK		0x0c
-
-static struct fb_info fb_info;
-
-static unsigned long screen_base;	/* base address of screen */
-static unsigned long real_screen_base;	/* (only for Overscan) */
-
-static int screen_len;
-
-static int current_par_valid=0; 
-
-static int currcon=0;
-
-static int mono_moni=0;
-
-static struct display disp[MAX_NR_CONSOLES];
-
-
-#ifdef ATAFB_EXT
-/* external video handling */
-
-static unsigned			external_xres;
-static unsigned			external_yres;
-static unsigned			external_depth;
-static int				external_pmode;
-static unsigned long	external_addr = 0;
-static unsigned long	external_len;
-static unsigned long	external_vgaiobase = 0;
-static unsigned int		external_bitspercol = 6;
-
-/* 
-++JOE <joe@amber.dinoco.de>: 
-added card type for external driver, is only needed for
-colormap handling.
-*/
-
-enum cardtype { IS_VGA, IS_MV300 };
-static enum cardtype external_card_type = IS_VGA;
-
-/*
-The MV300 mixes the color registers. So we need an array of munged
-indices in order to acces the correct reg.
-*/
-static int MV300_reg_1bit[2]={0,1};
-static int MV300_reg_4bit[16]={
-0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15 };
-static int MV300_reg_8bit[256]={
-0, 128, 64, 192, 32, 160, 96, 224, 16, 144, 80, 208, 48, 176, 112, 240, 
-8, 136, 72, 200, 40, 168, 104, 232, 24, 152, 88, 216, 56, 184, 120, 248, 
-4, 132, 68, 196, 36, 164, 100, 228, 20, 148, 84, 212, 52, 180, 116, 244, 
-12, 140, 76, 204, 44, 172, 108, 236, 28, 156, 92, 220, 60, 188, 124, 252, 
-2, 130, 66, 194, 34, 162, 98, 226, 18, 146, 82, 210, 50, 178, 114, 242, 
-10, 138, 74, 202, 42, 170, 106, 234, 26, 154, 90, 218, 58, 186, 122, 250, 
-6, 134, 70, 198, 38, 166, 102, 230, 22, 150, 86, 214, 54, 182, 118, 246, 
-14, 142, 78, 206, 46, 174, 110, 238, 30, 158, 94, 222, 62, 190, 126, 254, 
-1, 129, 65, 193, 33, 161, 97, 225, 17, 145, 81, 209, 49, 177, 113, 241, 
-9, 137, 73, 201, 41, 169, 105, 233, 25, 153, 89, 217, 57, 185, 121, 249, 
-5, 133, 69, 197, 37, 165, 101, 229, 21, 149, 85, 213, 53, 181, 117, 245, 
-13, 141, 77, 205, 45, 173, 109, 237, 29, 157, 93, 221, 61, 189, 125, 253, 
-3, 131, 67, 195, 35, 163, 99, 227, 19, 147, 83, 211, 51, 179, 115, 243, 
-11, 139, 75, 203, 43, 171, 107, 235, 27, 155, 91, 219, 59, 187, 123, 251, 
-7, 135, 71, 199, 39, 167, 103, 231, 23, 151, 87, 215, 55, 183, 119, 247, 
-15, 143, 79, 207, 47, 175, 111, 239, 31, 159, 95, 223, 63, 191, 127, 255 }; 
-
-static int *MV300_reg = MV300_reg_8bit;
-
-/*
-And on the MV300 it's difficult to read out the hardware palette. So we
-just keep track of the set colors in our own array here, and use that!
-*/
-
-static struct { unsigned char red,green,blue,pad; } MV300_color[256];
-#endif /* ATAFB_EXT */
-
-
-static int inverse=0;
-
-extern int fontheight_8x8;
-extern int fontwidth_8x8;
-extern unsigned char fontdata_8x8[];
-
-extern int fontheight_8x16;
-extern int fontwidth_8x16;
-extern unsigned char fontdata_8x16[];
-
-/* import first 16 colors from fbcon.c */
-extern unsigned short packed16_cmap[16];
-
-
-/* ++roman: This structure abstracts from the underlying hardware (ST(e),
- * TT, or Falcon.
- *
- * int (*detect)( void )
- *   This function should detect the current video mode settings and
- *   store them in atari_fb_predefined[0] for later reference by the
- *   user. Return the index+1 of an equivalent predefined mode or 0
- *   if there is no such.
- * 
- * int (*encode_fix)( struct fb_fix_screeninfo *fix,
- *                    struct atari_fb_par *par )
- *   This function should fill in the 'fix' structure based on the
- *   values in the 'par' structure.
- *   
- * int (*decode_var)( struct fb_var_screeninfo *var,
- *                    struct atari_fb_par *par )
- *   Get the video params out of 'var'. If a value doesn't fit, round
- *   it up, if it's too big, return EINVAL.
- *   Round up in the following order: bits_per_pixel, xres, yres, 
- *   xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields, 
- *   horizontal timing, vertical timing.
- *
- * int (*encode_var)( struct fb_var_screeninfo *var,
- *                    struct atari_fb_par *par );
- *   Fill the 'var' structure based on the values in 'par' and maybe
- *   other values read out of the hardware.
- *   
- * void (*get_par)( struct atari_fb_par *par )
- *   Fill the hardware's 'par' structure.
- *   
- * void (*set_par)( struct atari_fb_par *par )
- *   Set the hardware according to 'par'.
- *   
- * int (*setcolreg)( unsigned regno, unsigned red,
- *                   unsigned green, unsigned blue,
- *                   unsigned transp )
- *   Set a single color register. The values supplied are already
- *   rounded down to the hardware's capabilities (according to the
- *   entries in the var structure). Return != 0 for invalid regno.
- *
- * int (*getcolreg)( unsigned regno, unsigned *red,
- *                   unsigned *green, unsigned *blue,
- *                   unsigned *transp )
- *   Read a single color register and split it into
- *   colors/transparent. Return != 0 for invalid regno.
- *
- * void (*set_screen_base)( unsigned long s_base )
- *   Set the base address of the displayed frame buffer. Only called
- *   if yres_virtual > yres or xres_virtual > xres.
- *
- * int (*blank)( int blank_mode )
- *   Blank the screen if blank_mode!=0, else unblank. If blank==NULL then
- *   the caller blanks by setting the CLUT to all black. Return 0 if blanking
- *   succeeded, !=0 if un-/blanking failed due to e.g. a video mode which
- *   doesn't support it. Implements VESA suspend and powerdown modes on
- *   hardware that supports disabling hsync/vsync:
- *       blank_mode==2: suspend vsync, 3:suspend hsync, 4: powerdown.
- */
-
-static struct fb_hwswitch {
-	int  (*detect)( void );
-	int  (*encode_fix)( struct fb_fix_screeninfo *fix,
-						struct atari_fb_par *par );
-	int  (*decode_var)( struct fb_var_screeninfo *var,
-						struct atari_fb_par *par );
-	int  (*encode_var)( struct fb_var_screeninfo *var,
-						struct atari_fb_par *par );
-	void (*get_par)( struct atari_fb_par *par );
-	void (*set_par)( struct atari_fb_par *par );
-	int  (*getcolreg)( unsigned regno, unsigned *red,
-					   unsigned *green, unsigned *blue,
-					   unsigned *transp );
-	int  (*setcolreg)( unsigned regno, unsigned red,
-					   unsigned green, unsigned blue,
-					   unsigned transp );
-	void (*set_screen_base)( unsigned long s_base );
-	int  (*blank)( int blank_mode );
-	int  (*pan_display)( struct fb_var_screeninfo *var,
-						 struct atari_fb_par *par);
-} *fbhw;
-
-static char *autodetect_names[] = {"autodetect", NULL};
-static char *stlow_names[] = {"stlow", NULL};
-static char *stmid_names[] = {"stmid", "default5", NULL};
-static char *sthigh_names[] = {"sthigh", "default4", NULL};
-static char *ttlow_names[] = {"ttlow", NULL};
-static char *ttmid_names[]= {"ttmid", "default1", NULL};
-static char *tthigh_names[]= {"tthigh", "default2", NULL};
-static char *vga2_names[] = {"vga2", NULL};
-static char *vga4_names[] = {"vga4", NULL};
-static char *vga16_names[] = {"vga16", "default3", NULL};
-static char *vga256_names[] = {"vga256", NULL};
-static char *falh2_names[] = {"falh2", NULL};
-static char *falh16_names[] = {"falh16", NULL};
-static char *user0_names[] = {"user0", NULL};
-static char *user1_names[] = {"user1", NULL};
-static char *user2_names[] = {"user2", NULL};
-static char *user3_names[] = {"user3", NULL};
-static char *user4_names[] = {"user4", NULL};
-static char *user5_names[] = {"user5", NULL};
-static char *user6_names[] = {"user6", NULL};
-static char *user7_names[] = {"user7", NULL};
-static char *dummy_names[] = {"dummy", NULL};
-
-static char **fb_var_names[] = {
-	/* Writing the name arrays directly in this array (via "(char *[]){...}")
-	 * crashes gcc 2.5.8 (sigsegv) if the inner array
-	 * contains more than two items. I've also seen that all elements
-	 * were identical to the last (my cross-gcc) :-(*/
-	autodetect_names,
-	stlow_names,
-	stmid_names,
-	sthigh_names,
-	ttlow_names,
-	ttmid_names,
-	tthigh_names,
-	vga2_names,
-	vga4_names,
-	vga16_names,
-	vga256_names,
-	falh2_names,
-	falh16_names,
-	dummy_names, dummy_names, dummy_names, dummy_names,
-	dummy_names, dummy_names, dummy_names, dummy_names,
-	dummy_names, dummy_names,
-	user0_names,
-	user1_names,
-	user2_names,
-	user3_names,
-	user4_names,
-	user5_names,
-	user6_names,
-	user7_names,
-	NULL
-	/* ,NULL */ /* this causes a sigsegv on my gcc-2.5.8 */
-};
-
-static struct fb_var_screeninfo atari_fb_predefined[] = {
- 	/*
- 	 * yres_virtual==0 means use hw-scrolling if possible, else yres
- 	 */
- 	{ /* autodetect */
-	  0, 0, 0, 0, 0, 0, 0, 0,   		/* xres-grayscale */
-	  {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, {0, 0, 0}, 	/* red green blue tran*/
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
- 	{ /* st low */
-	  320, 200, 320, 0, 0, 0, 4, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* st mid */
-	  640, 200, 640, 0, 0, 0, 2, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* st high */
-	  640, 400, 640, 0, 0, 0, 1, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* tt low */
-	  320, 480, 320, 0, 0, 0, 8, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* tt mid */
-	  640, 480, 640, 0, 0, 0, 4, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* tt high */
-	  1280, 960, 1280, 0, 0, 0, 1, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* vga2 */
-	  640, 480, 640, 0, 0, 0, 1, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* vga4 */
-	  640, 480, 640, 0, 0, 0, 2, 0,
-	  {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* vga16 */
-	  640, 480, 640, 0, 0, 0, 4, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* vga256 */
-	  640, 480, 640, 0, 0, 0, 8, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* falh2 */
-	  896, 608, 896, 0, 0, 0, 1, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* falh16 */
-	  896, 608, 896, 0, 0, 0, 4, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	/* Minor 14..23 free for more standard video modes */
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	{ 0, },
-	/* Minor 24..31 reserved for user defined video modes */
-	{ /* user0, initialized to Rx;y;d from commandline, if supplied */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user1 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user2 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user3 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user4 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user5 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user6 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
-	{ /* user7 */
-	  0, 0, 0, 0, 0, 0, 0, 0,
-	  {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0},
-	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 }
-};
-
-static int num_atari_fb_predefined=arraysize(atari_fb_predefined);
-
-
-static int
-get_video_mode(char *vname)
-{
-    char ***name_list;
-    char **name;
-    int i;
-    name_list=fb_var_names;
-    for (i = 0 ; i < num_atari_fb_predefined ; i++) {
-	name=*(name_list++);
-	if (! name || ! *name)
-	    break;
-	while (*name) {
-	    if (! strcmp(vname, *name))
-		return i+1;
-	    name++;
-	}
-    }
-    return 0;
-}
-
-
-
-/* ------------------- TT specific functions ---------------------- */
-
-#ifdef ATAFB_TT
-
-static int tt_encode_fix( struct fb_fix_screeninfo *fix,
-						  struct atari_fb_par *par )
-
-{
-	int mode, i;
-
-	strcpy(fix->id,"Atari Builtin");
-	fix->smem_start=real_screen_base;
-	fix->smem_len = screen_len;
-	fix->type=FB_TYPE_INTERLEAVED_PLANES;
-	fix->type_aux=2;
-	fix->visual=FB_VISUAL_PSEUDOCOLOR;
-	mode = par->hw.tt.mode & TT_SHIFTER_MODEMASK;
-	if (mode == TT_SHIFTER_TTHIGH || mode == TT_SHIFTER_STHIGH) {
-		fix->type=FB_TYPE_PACKED_PIXELS;
-		fix->type_aux=0;
-		if (mode == TT_SHIFTER_TTHIGH)
-			fix->visual=FB_VISUAL_MONO01;
-	}
-	fix->xpanstep=0;
-	fix->ypanstep=1;
-	fix->ywrapstep=0;
-	fix->line_length = 0;
-	for (i=0; i<arraysize(fix->reserved); i++)
-		fix->reserved[i]=0;
-	return 0;
-}
-
-
-static int tt_decode_var( struct fb_var_screeninfo *var,
-						  struct atari_fb_par *par )
-{
-	int xres=var->xres;
-	int yres=var->yres;
-	int bpp=var->bits_per_pixel;
-	int linelen;
-	int yres_virtual = var->yres_virtual;
-
-	if (mono_moni) {
-		if (bpp > 1 || xres > sttt_xres*2 || yres >tt_yres*2)
-			return -EINVAL;
-		par->hw.tt.mode=TT_SHIFTER_TTHIGH;
-		xres=sttt_xres*2;
-		yres=tt_yres*2;
-		bpp=1;
-	} else {
-		if (bpp > 8 || xres > sttt_xres || yres > tt_yres)
-			return -EINVAL;
-		if (bpp > 4) {
-			if (xres > sttt_xres/2 || yres > tt_yres)
-				return -EINVAL;
-			par->hw.tt.mode=TT_SHIFTER_TTLOW;
-			xres=sttt_xres/2;
-			yres=tt_yres;
-			bpp=8;
-		}
-		else if (bpp > 2) {
-			if (xres > sttt_xres || yres > tt_yres)
-				return -EINVAL;
-			if (xres > sttt_xres/2 || yres > st_yres/2) {
-				par->hw.tt.mode=TT_SHIFTER_TTMID;
-				xres=sttt_xres;
-				yres=tt_yres;
-				bpp=4;
-			}
-			else {
-				par->hw.tt.mode=TT_SHIFTER_STLOW;
-				xres=sttt_xres/2;
-				yres=st_yres/2;
-				bpp=4;
-			}
-		}
-		else if (bpp > 1) {
-			if (xres > sttt_xres || yres > st_yres/2)
-				return -EINVAL;
-			par->hw.tt.mode=TT_SHIFTER_STMID;
-			xres=sttt_xres;
-			yres=st_yres/2;
-			bpp=2;
-		}
-		else if (var->xres > sttt_xres || var->yres > st_yres) {
-			return -EINVAL;
-		}
-		else {
-			par->hw.tt.mode=TT_SHIFTER_STHIGH;
-			xres=sttt_xres;
-			yres=st_yres;
-			bpp=1;
-		}
-	}
-	if (yres_virtual <= 0)
-		yres_virtual = 0;
-	else if (yres_virtual < yres)
-		yres_virtual = yres;
-	if (var->sync & FB_SYNC_EXT)
-		par->hw.tt.sync=0;
-	else
-		par->hw.tt.sync=1;
-	linelen=xres*bpp/8;
-	if (yres_virtual * linelen > screen_len && screen_len)
-		return -EINVAL;
-	if (yres * linelen > screen_len && screen_len)
-		return -EINVAL;
-	if (var->yoffset + yres > yres_virtual && yres_virtual)
-		return -EINVAL;
-	par->yres_virtual = yres_virtual;
-	par->screen_base = screen_base + var->yoffset * linelen;
-	return 0;
-}
-
-static int tt_encode_var( struct fb_var_screeninfo *var,
-						  struct atari_fb_par *par )
-{
-	int linelen, i;
-	var->red.offset=0;
-	var->red.length=4;
-	var->red.msb_right=0;
-	var->grayscale=0;
-
-	var->pixclock=31041;
-	var->left_margin=120;		/* these may be incorrect 	*/
-	var->right_margin=100;
-	var->upper_margin=8;
-	var->lower_margin=16;
-	var->hsync_len=140;
-	var->vsync_len=30;
-
-	var->height=-1;
-	var->width=-1;
-
-	if (par->hw.tt.sync & 1)
-		var->sync=0;
-	else
-		var->sync=FB_SYNC_EXT;
-
-	switch (par->hw.tt.mode & TT_SHIFTER_MODEMASK) {
-	case TT_SHIFTER_STLOW:
-		var->xres=sttt_xres/2;
-		var->xres_virtual=sttt_xres_virtual/2;
-		var->yres=st_yres/2;
-		var->bits_per_pixel=4;
-		break;
-	case TT_SHIFTER_STMID:
-		var->xres=sttt_xres;
-		var->xres_virtual=sttt_xres_virtual;
-		var->yres=st_yres/2;
-		var->bits_per_pixel=2;
-		break;
-	case TT_SHIFTER_STHIGH:
-		var->xres=sttt_xres;
-		var->xres_virtual=sttt_xres_virtual;
-		var->yres=st_yres;
-		var->bits_per_pixel=1;
-		break;
-	case TT_SHIFTER_TTLOW:
-		var->xres=sttt_xres/2;
-		var->xres_virtual=sttt_xres_virtual/2;
-		var->yres=tt_yres;
-		var->bits_per_pixel=8;
-		break;
-	case TT_SHIFTER_TTMID:
-		var->xres=sttt_xres;
-		var->xres_virtual=sttt_xres_virtual;
-		var->yres=tt_yres;
-		var->bits_per_pixel=4;
-		break;
-	case TT_SHIFTER_TTHIGH:
-		var->red.length=0;
-		var->xres=sttt_xres*2;
-		var->xres_virtual=sttt_xres_virtual*2;
-		var->yres=tt_yres*2;
-		var->bits_per_pixel=1;
-		break;
-	}		
-	var->blue=var->green=var->red;
-	var->transp.offset=0;
-	var->transp.length=0;
-	var->transp.msb_right=0;
-	linelen=var->xres_virtual * var->bits_per_pixel / 8;
-	if (! use_hwscroll)
-		var->yres_virtual=var->yres;
-	else if (screen_len)
-		if (par->yres_virtual)
-			var->yres_virtual = par->yres_virtual;
-		else
-			/* yres_virtual==0 means use maximum */
-			var->yres_virtual = screen_len / linelen;
-	else {
-		if (hwscroll < 0)
-			var->yres_virtual = 2 * var->yres;
-		else
-			var->yres_virtual=var->yres+hwscroll * 16;
-	}
-	var->xoffset=0;
-	if (screen_base)
-		var->yoffset=(par->screen_base - screen_base)/linelen;
-	else
-		var->yoffset=0;
-	var->nonstd=0;
-	var->activate=0;
-	var->vmode=FB_VMODE_NONINTERLACED;
-	for (i=0; i<arraysize(var->reserved); i++)
-		var->reserved[i]=0;
-	return 0;
-}
-
-
-static void tt_get_par( struct atari_fb_par *par )
-{
-	unsigned long addr;
-	par->hw.tt.mode=shifter_tt.tt_shiftmode;
-	par->hw.tt.sync=shifter.syncmode;
-	addr = ((shifter.bas_hi & 0xff) << 16) |
-	       ((shifter.bas_md & 0xff) << 8)  |
-	       ((shifter.bas_lo & 0xff));
-	par->screen_base = PTOV(addr);
-}
-
-static void tt_set_par( struct atari_fb_par *par )
-{
-	shifter_tt.tt_shiftmode=par->hw.tt.mode;
-	shifter.syncmode=par->hw.tt.sync;
-	/* only set screen_base if really necessary */
-	if (current_par.screen_base != par->screen_base)
-		fbhw->set_screen_base(par->screen_base);
-}
-
-
-static int tt_getcolreg( unsigned regno, unsigned *red,
-						 unsigned *green, unsigned *blue,
-						 unsigned *transp )
-{
-	if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
-		regno += 254;
-	if (regno > 255)
-		return 1;
-	*blue = tt_palette[regno];
-	*green = (*blue >> 4) & 0xf;
-	*red = (*blue >> 8) & 0xf;
-	*blue &= 0xf;
-	*transp = 0;
-	return 0;
-}
-
-
-static int tt_setcolreg( unsigned regno, unsigned red,
-						 unsigned green, unsigned blue,
-						 unsigned transp )
-{
-	if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
-		regno += 254;
-	if (regno > 255)
-		return 1;
-	tt_palette[regno] = (red << 8) | (green << 4) | blue;
-	if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
-		TT_SHIFTER_STHIGH && regno == 254)
-		tt_palette[0] = 0;
-	return 0;
-}
-
-						  
-static int tt_detect( void )
-
-{	struct atari_fb_par par;
-
-	/* Determine the connected monitor: The DMA sound must be
-	 * disabled before reading the MFP GPIP, because the Sound
-	 * Done Signal and the Monochrome Detect are XORed together!
-	 *
-	 * Even on a TT, we should look if there is a DMA sound. It was
-	 * announced that the Eagle is TT compatible, but only the PCM is
-	 * missing...
-	 */
-	if (ATARIHW_PRESENT(PCM_8BIT)) { 
-		tt_dmasnd.ctrl = DMASND_CTRL_OFF;
-		udelay(20);	/* wait a while for things to settle down */
-	}
-	mono_moni = (mfp.par_dt_reg & 0x80) == 0;
-
-	tt_get_par(&par);
-	tt_encode_var(&atari_fb_predefined[0], &par);
-
-	return 1;
-}
-
-#endif /* ATAFB_TT */
-
-/* ------------------- Falcon specific functions ---------------------- */
-
-#ifdef ATAFB_FALCON
-
-static int mon_type;		/* Falcon connected monitor */
-static int f030_bus_width;	/* Falcon ram bus width (for vid_control) */
-#define F_MON_SM	0
-#define F_MON_SC	1
-#define F_MON_VGA	2
-#define F_MON_TV	3
-
-/* Multisync monitor capabilities */
-/* Atari-TOS defaults if no boot option present */
-static long vfmin=58, vfmax=62, hfmin=31000, hfmax=32000;
-
-static struct pixel_clock {
-	unsigned long f;	/* f/[Hz] */
-	unsigned long t;	/* t/[ps] (=1/f) */
-	int right, hsync, left;	/* standard timing in clock cycles, not pixel */
-		/* hsync initialized in falcon_detect() */
-	int sync_mask;		/* or-mask for hw.falcon.sync to set this clock */
-	int control_mask;	/* ditto, for hw.falcon.vid_control */
-}
-f25  = {25175000, 39721, 18, 0, 42, 0x0, VCO_CLOCK25},
-f32  = {32000000, 31250, 18, 0, 42, 0x0, 0},
-fext = {       0,     0, 18, 0, 42, 0x1, 0};
-
-/* VIDEL-prescale values [mon_type][pixel_length from VCO] */
-static int vdl_prescale[4][3] = {{4,2,1}, {4,2,1}, {4,2,2}, {4,2,1}};
-
-/* Default hsync timing [mon_type] in picoseconds */
-static long h_syncs[4] = {3000000, 4875000, 4000000, 4875000};
-
-
-static inline int hxx_prescale(struct falcon_hw *hw)
-{
-	return hw->ste_mode ? 16 :
-		   vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
-}
-
-static int falcon_encode_fix( struct fb_fix_screeninfo *fix,
-							  struct atari_fb_par *par )
-{
-	int i;
-
-	strcpy(fix->id, "Atari Builtin");
-	fix->smem_start = real_screen_base;
-	fix->smem_len = screen_len;
-	fix->type = FB_TYPE_INTERLEAVED_PLANES;
-	fix->type_aux = 2;
-	fix->visual = FB_VISUAL_PSEUDOCOLOR;
-	fix->xpanstep = 1;
-	fix->ypanstep = 1;
-	fix->ywrapstep = 0;
-	if (par->hw.falcon.mono) {
-		fix->type = FB_TYPE_PACKED_PIXELS;
-		fix->type_aux = 0;
-		/* no smooth scrolling with longword aligned video mem */
-		fix->xpanstep = 32;
-	}
-	else if (par->hw.falcon.f_shift & 0x100) {
-		fix->type = FB_TYPE_PACKED_PIXELS;
-		fix->type_aux = 0;
-		/* Is this ok or should it be DIRECTCOLOR? */
-		fix->visual = FB_VISUAL_TRUECOLOR;
-		fix->xpanstep = 2;
-	}
-	fix->line_length = 0;
-	for (i=0; i<arraysize(fix->reserved); i++)
-		fix->reserved[i]=0;
-	return 0;
-}
-
-
-static int falcon_decode_var( struct fb_var_screeninfo *var,
-							  struct atari_fb_par *par )
-{
-	int bpp = var->bits_per_pixel;
-	int xres = var->xres;
-	int yres = var->yres;
-	int xres_virtual = var->xres_virtual;
-	int yres_virtual = var->yres_virtual;
-	int left_margin, right_margin, hsync_len;
-	int upper_margin, lower_margin, vsync_len;
-	int linelen;
-	int interlace = 0, doubleline = 0;
-	struct pixel_clock *pclock;
-	int plen; /* width of pixel in clock cycles */
-	int xstretch;
-	int prescale;
-	int longoffset = 0;
-	int hfreq, vfreq;
-
-/*
-	Get the video params out of 'var'. If a value doesn't fit, round
-	it up, if it's too big, return EINVAL.
-	Round up in the following order: bits_per_pixel, xres, yres, 
-	xres_virtual, yres_virtual, xoffset, yoffset, grayscale, bitfields, 
-	horizontal timing, vertical timing.
-
-	There is a maximum of screen resolution determined by pixelclock
-	and minimum frame rate -- (X+hmarg.)*(Y+vmarg.)*vfmin <= pixelclock.
-	In interlace mode this is     "     *    "     *vfmin <= pixelclock.
-	Additional constraints: hfreq.
-	Frequency range for multisync monitors is given via command line.
-	For TV and SM124 both frequencies are fixed.
-
-	X % 16 == 0 to fit 8x?? font (except 1 bitplane modes must use X%32==0)
-	Y % 16 == 0 to fit 8x16 font
-	Y % 8 == 0 if Y<400
-
-	Currently interlace and doubleline mode in var are ignored. 
-	On SM124 and TV only the standard resolutions can be used.
-*/
-
-	/* Reject uninitialized mode */
-	if (!xres || !yres || !bpp)
-		return -EINVAL;
-
-	if (mon_type == F_MON_SM && bpp != 1) {
-		return -EINVAL;
-	}
-	else if (bpp <= 1) {
-		bpp = 1;
-		par->hw.falcon.f_shift = 0x400;
-		par->hw.falcon.st_shift = 0x200;
-	}
-	else if (bpp <= 2) {
-		bpp = 2;
-		par->hw.falcon.f_shift = 0x000;
-		par->hw.falcon.st_shift = 0x100;
-	}
-	else if (bpp <= 4) {
-		bpp = 4;
-		par->hw.falcon.f_shift = 0x000;
-		par->hw.falcon.st_shift = 0x000;
-	}
-	else if (bpp <= 8) {
-		bpp = 8;
-		par->hw.falcon.f_shift = 0x010;
-	}
-	else if (bpp <= 16) {
-		bpp = 16; /* packed pixel mode */
-		par->hw.falcon.f_shift = 0x100; /* hicolor, no overlay */
-	}
-	else
-		return -EINVAL;
-	par->hw.falcon.bpp = bpp;
-
-	if (mon_type == F_MON_SM || DontCalcRes) {
-		/* Skip all calculations. VGA/TV/SC1224 only supported. */
-		struct fb_var_screeninfo *myvar = &atari_fb_predefined[0];
-		
-		if (bpp > myvar->bits_per_pixel ||
-			var->xres > myvar->xres ||
-			var->yres > myvar->yres)
-			return -EINVAL;
-		fbhw->get_par(par);	/* Current par will be new par */
-		goto set_screen_base;	/* Don't forget this */
-	}
-
-	/* Only some fixed resolutions < 640x400 */
-	if (xres <= 320)
-		xres = 320;
-	else if (xres <= 640 && bpp != 16)
-		xres = 640;
-	if (yres <= 200)
-		yres = 200;
-	else if (yres <= 240)
-		yres = 240;
-	else if (yres <= 400)
-		yres = 400;
-
-	/* 2 planes must use STE compatibility mode */
-	par->hw.falcon.ste_mode = bpp==2;
-	par->hw.falcon.mono = bpp==1;
-
-	/* Total and visible scanline length must be a multiple of one longword,
-	 * this and the console fontwidth yields the alignment for xres and
-	 * xres_virtual.
-	 * TODO: this way "odd" fontheights are not supported
-	 *
-	 * Special case in STE mode: blank and graphic positions don't align,
-	 * avoid trash at right margin
-	 */
-	if (par->hw.falcon.ste_mode)
-		xres = (xres + 63) & ~63;
-	else if (bpp == 1)
-		xres = (xres + 31) & ~31;
-	else
-		xres = (xres + 15) & ~15;
-	if (yres >= 400)
-		yres = (yres + 15) & ~15;
-	else
-		yres = (yres + 7) & ~7;
-
-	if (xres_virtual < xres)
-		xres_virtual = xres;
-	else if (bpp == 1)
-		xres_virtual = (xres_virtual + 31) & ~31;
-	else
-		xres_virtual = (xres_virtual + 15) & ~15;
-
-	if (yres_virtual <= 0)
-		yres_virtual = 0;
-	else if (yres_virtual < yres)
-		yres_virtual = yres;
-
-	/* backward bug-compatibility */
-	if (var->pixclock > 1)
-		var->pixclock -= 1;
-
-	par->hw.falcon.line_width = bpp * xres / 16;
-	par->hw.falcon.line_offset = bpp * (xres_virtual - xres) / 16;
-
-	/* single or double pixel width */
-	xstretch = (xres < 640) ? 2 : 1;
-
-#if 0 /* SM124 supports only 640x400, this is rejected above */
-	if (mon_type == F_MON_SM) {
-		if (xres != 640 && yres != 400)
-			return -EINVAL;
-		plen = 1;
-		pclock = &f32;
-		/* SM124-mode is special */
-		par->hw.falcon.ste_mode = 1;
-		par->hw.falcon.f_shift = 0x000;
-		par->hw.falcon.st_shift = 0x200;
-		left_margin = hsync_len = 128 / plen;
-		right_margin = 0;
-		/* TODO set all margins */
-	}
-	else
-#endif
-	if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
-		plen = 2 * xstretch;
-		if (var->pixclock > f32.t * plen)
-			return -EINVAL;
-		pclock = &f32;
-		if (yres > 240)
-			interlace = 1;
-		if (var->pixclock == 0) {
-			/* set some minimal margins which center the screen */
-			left_margin = 32;
-			right_margin = 18;
-			hsync_len = pclock->hsync / plen;
-			upper_margin = 31;
-			lower_margin = 14;
-			vsync_len = interlace ? 3 : 4;
-		} else {
-			left_margin = var->left_margin;
-			right_margin = var->right_margin;
-			hsync_len = var->hsync_len;
-			upper_margin = var->upper_margin;
-			lower_margin = var->lower_margin;
-			vsync_len = var->vsync_len;
-			if (var->vmode & FB_VMODE_INTERLACED) {
-				upper_margin = (upper_margin + 1) / 2;
-				lower_margin = (lower_margin + 1) / 2;
-				vsync_len = (vsync_len + 1) / 2;
-			} else if (var->vmode & FB_VMODE_DOUBLE) {
-				upper_margin *= 2;
-				lower_margin *= 2;
-				vsync_len *= 2;
-			}
-		}
-	}
-	else
-	{	/* F_MON_VGA */
-		if (bpp == 16)
-			xstretch = 2; /* Double pixel width only for hicolor */
-		/* Default values are used for vert./hor. timing if no pixelclock given. */
-		if (var->pixclock == 0) {
-			int linesize;
-
-			/* Choose master pixelclock depending on hor. timing */
-			plen = 1 * xstretch;
-			if ((plen * xres + f25.right+f25.hsync+f25.left) * hfmin < f25.f)
-				pclock = &f25;
-			else if ((plen * xres + f32.right+f32.hsync+f32.left) * hfmin < f32.f)
-				pclock = &f32;
-			else if ((plen * xres + fext.right+fext.hsync+fext.left) * hfmin < fext.f
-			         && fext.f)
-				pclock = &fext;
-			else
-				return -EINVAL;
-
-			left_margin = pclock->left / plen;
-			right_margin = pclock->right / plen;
-			hsync_len = pclock->hsync / plen;
-			linesize = left_margin + xres + right_margin + hsync_len;
-			upper_margin = 31;
-			lower_margin = 11;
-			vsync_len = 3;
-		}
-		else {
-			/* Choose largest pixelclock <= wanted clock */
-			int i;
-			unsigned long pcl = ULONG_MAX;
-			pclock = 0;
-			for (i=1; i <= 4; i *= 2) {
-				if (f25.t*i >= var->pixclock && f25.t*i < pcl) {
-					pcl = f25.t * i;
-					pclock = &f25;
-				}
-				if (f32.t*i >= var->pixclock && f32.t*i < pcl) {
-					pcl = f32.t * i;
-					pclock = &f32;
-				}
-				if (fext.t && fext.t*i >= var->pixclock && fext.t*i < pcl) {
-					pcl = fext.t * i;
-					pclock = &fext;
-				}
-			}
-			if (!pclock)
-				return -EINVAL;
-			plen = pcl / pclock->t;
-
-			left_margin = var->left_margin;
-			right_margin = var->right_margin;
-			hsync_len = var->hsync_len;
-			upper_margin = var->upper_margin;
-			lower_margin = var->lower_margin;
-			vsync_len = var->vsync_len;
-			/* Internal unit is [single lines per (half-)frame] */
-			if (var->vmode & FB_VMODE_INTERLACED) {
-				/* # lines in half frame */
-				/* External unit is [lines per full frame] */
-				upper_margin = (upper_margin + 1) / 2;
-				lower_margin = (lower_margin + 1) / 2;
-				vsync_len = (vsync_len + 1) / 2;
-			}
-			else if (var->vmode & FB_VMODE_DOUBLE) {
-				/* External unit is [double lines per frame] */
-				upper_margin *= 2;
-				lower_margin *= 2;
-				vsync_len *= 2;
-			}
-		}
-		if (pclock == &fext)
-			longoffset = 1; /* VIDEL doesn't synchronize on short offset */
-	}
-	/* Is video bus bandwidth (32MB/s) too low for this resolution? */
-	/* this is definitely wrong if bus clock != 32MHz */
-	if (pclock->f / plen / 8 * bpp > 32000000L)
-		return -EINVAL;
-
-	if (vsync_len < 1)
-		vsync_len = 1;
-
-	/* include sync lengths in right/lower margin for all calculations */
-	right_margin += hsync_len;
-	lower_margin += vsync_len;
-
-	/* ! In all calculations of margins we use # of lines in half frame
-	 * (which is a full frame in non-interlace mode), so we can switch
-	 * between interlace and non-interlace without messing around
-	 * with these.
-	 */
-  again:
-	/* Set base_offset 128 and video bus width */
-	par->hw.falcon.vid_control = mon_type | f030_bus_width;
-	if (!longoffset)
-		par->hw.falcon.vid_control |= VCO_SHORTOFFS;	/* base_offset 64 */
-	if (var->sync & FB_SYNC_HOR_HIGH_ACT)
-		par->hw.falcon.vid_control |= VCO_HSYPOS;
-	if (var->sync & FB_SYNC_VERT_HIGH_ACT)
-		par->hw.falcon.vid_control |= VCO_VSYPOS;
-	/* Pixelclock */
-	par->hw.falcon.vid_control |= pclock->control_mask;
-	/* External or internal clock */
-	par->hw.falcon.sync = pclock->sync_mask | 0x2;
-	/* Pixellength and prescale */
-	par->hw.falcon.vid_mode = (2/plen) << 2;
-	if (doubleline)
-		par->hw.falcon.vid_mode |= VMO_DOUBLE;
-	if (interlace)
-		par->hw.falcon.vid_mode |= VMO_INTER;
-
-	/*********************
-	Horizontal timing: unit = [master clock cycles]
-	unit of hxx-registers: [master clock cycles * prescale]
-	Hxx-registers are 9 bit wide
-
-	1 line = ((hht + 2) * 2 * prescale) clock cycles
-
-	graphic output = hdb & 0x200 ?
-	       ((hht+2)*2 - hdb + hde) * prescale - hdboff + hdeoff:
-	       ( hht + 2  - hdb + hde) * prescale - hdboff + hdeoff
-	(this must be a multiple of plen*128/bpp, on VGA pixels
-	 to the right may be cut off with a bigger right margin)
-
-	start of graphics relative to start of 1st halfline = hdb & 0x200 ?
-	       (hdb - hht - 2) * prescale + hdboff :
-	       hdb * prescale + hdboff
-
-	end of graphics relative to start of 1st halfline =
-	       (hde + hht + 2) * prescale + hdeoff
-	*********************/
-	/* Calculate VIDEL registers */
-	{
-	int hdb_off, hde_off, base_off;
-	int gstart, gend1, gend2, align;
-
-	prescale = hxx_prescale(&par->hw.falcon);
-	base_off = par->hw.falcon.vid_control & VCO_SHORTOFFS ? 64 : 128;
-
-	/* Offsets depend on video mode */
-	/* Offsets are in clock cycles, divide by prescale to
-	 * calculate hd[be]-registers
-	 */
-	if (par->hw.falcon.f_shift & 0x100) {
-		align = 1;
-		hde_off = 0;
-		hdb_off = (base_off + 16 * plen) + prescale;
-	}
-	else {
-		align = 128 / bpp;
-		hde_off = ((128 / bpp + 2) * plen);
-		if (par->hw.falcon.ste_mode)
-			hdb_off = (64 + base_off + (128 / bpp + 2) * plen) + prescale;
-		else
-			hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
-	}
-
-	gstart = (prescale/2 + plen * left_margin) / prescale;
-	/* gend1 is for hde (gend-gstart multiple of align), shifter's xres */
-	gend1 = gstart + ((xres + align-1) / align)*align * plen / prescale;
-	/* gend2 is for hbb, visible xres (rest to gend1 is cut off by hblank) */
-	gend2 = gstart + xres * plen / prescale;
-	par->HHT = plen * (left_margin + xres + right_margin) /
-			   (2 * prescale) - 2;
-/*	par->HHT = (gend2 + plen * right_margin / prescale) / 2 - 2;*/
-
-	par->HDB = gstart - hdb_off/prescale;
-	par->HBE = gstart;
-	if (par->HDB < 0) par->HDB += par->HHT + 2 + 0x200;
-	par->HDE = gend1 - par->HHT - 2 - hde_off/prescale;
-	par->HBB = gend2 - par->HHT - 2;
-#if 0
-	/* One more Videl constraint: data fetch of two lines must not overlap */
-	if (par->HDB & 0x200  &&  par->HDB & ~0x200 - par->HDE <= 5) {
-		/* if this happens increase margins, decrease hfreq. */
-	}
-#endif
-	if (hde_off % prescale)
-		par->HBB++;		/* compensate for non matching hde and hbb */
-	par->HSS = par->HHT + 2 - plen * hsync_len / prescale;
-	if (par->HSS < par->HBB)
-		par->HSS = par->HBB;
-	}
-
-	/*  check hor. frequency */
-	hfreq = pclock->f / ((par->HHT+2)*prescale*2);
-	if (hfreq > hfmax && mon_type!=F_MON_VGA) {
-		/* ++guenther:   ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
-		/* Too high -> enlarge margin */
-		left_margin += 1;
-		right_margin += 1;
-		goto again;
-	}
-	if (hfreq > hfmax || hfreq < hfmin)
-		return -EINVAL;
-
-	/* Vxx-registers */
-	/* All Vxx must be odd in non-interlace, since frame starts in the middle
-	 * of the first displayed line!
-	 * One frame consists of VFT+1 half lines. VFT+1 must be even in
-	 * non-interlace, odd in interlace mode for synchronisation.
-	 * Vxx-registers are 11 bit wide
-	 */
-	par->VBE = (upper_margin * 2 + 1); /* must begin on odd halfline */
-	par->VDB = par->VBE;
-	par->VDE = yres;
-	if (!interlace) par->VDE <<= 1;
-	if (doubleline) par->VDE <<= 1;  /* VDE now half lines per (half-)frame */
-	par->VDE += par->VDB;
-	par->VBB = par->VDE;
-	par->VFT = par->VBB + (lower_margin * 2 - 1) - 1;
-	par->VSS = par->VFT+1 - (vsync_len * 2 - 1);
-	/* vbb,vss,vft must be even in interlace mode */
-	if (interlace) {
-		par->VBB++;
-		par->VSS++;
-		par->VFT++;
-	}
-
-	/* V-frequency check, hope I didn't create any loop here. */
-	/* Interlace and doubleline are mutually exclusive. */
-	vfreq = (hfreq * 2) / (par->VFT + 1);
-	if      (vfreq > vfmax && !doubleline && !interlace) {
-		/* Too high -> try again with doubleline */
-		doubleline = 1;
-		goto again;
-	}
-	else if (vfreq < vfmin && !interlace && !doubleline) {
-		/* Too low -> try again with interlace */
-		interlace = 1;
-		goto again;
-	}
-	else if (vfreq < vfmin && doubleline) {
-		/* Doubleline too low -> clear doubleline and enlarge margins */
-		int lines;
-		doubleline = 0;
-		for (lines=0; (hfreq*2)/(par->VFT+1+4*lines-2*yres)>vfmax; lines++)
-			;
-		upper_margin += lines;
-		lower_margin += lines;
-		goto again;
-	}
-	else if (vfreq > vfmax && doubleline) {
-		/* Doubleline too high -> enlarge margins */
-		int lines;
-		for (lines=0; (hfreq*2)/(par->VFT+1+4*lines)>vfmax; lines+=2)
-			;
-		upper_margin += lines;
-		lower_margin += lines;
-		goto again;
-	}
-	else if (vfreq > vfmax && interlace) {
-		/* Interlace, too high -> enlarge margins */
-		int lines;
-		for (lines=0; (hfreq*2)/(par->VFT+1+4*lines)>vfmax; lines++)
-			;
-		upper_margin += lines;
-		lower_margin += lines;
-		goto again;
-	}
-	else if (vfreq < vfmin || vfreq > vfmax)
-		return -EINVAL;
-
-  set_screen_base:
-	linelen = xres_virtual * bpp / 8;
-	if (yres_virtual * linelen > screen_len && screen_len)
-		return -EINVAL;
-	if (yres * linelen > screen_len && screen_len)
-		return -EINVAL;
-	if (var->yoffset + yres > yres_virtual && yres_virtual)
-		return -EINVAL;
-	par->yres_virtual = yres_virtual;
-	par->screen_base = screen_base + var->yoffset * linelen;
-	par->hw.falcon.xoffset = 0;
-
-	return 0;
-}
-
-static int falcon_encode_var( struct fb_var_screeninfo *var,
-							  struct atari_fb_par *par )
-{
-/* !!! only for VGA !!! */
-	int linelen, i;
-	int prescale, plen;
-	int hdb_off, hde_off, base_off;
-	struct falcon_hw *hw = &par->hw.falcon;
-
-	/* possible frequencies: 25.175 or 32MHz */
-	var->pixclock = hw->sync & 0x1 ? fext.t :
-	                hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
-
-	var->height=-1;
-	var->width=-1;
-
-	var->sync=0;
-	if (hw->vid_control & VCO_HSYPOS)
-		var->sync |= FB_SYNC_HOR_HIGH_ACT;
-	if (hw->vid_control & VCO_VSYPOS)
-		var->sync |= FB_SYNC_VERT_HIGH_ACT;
-
-	var->vmode = FB_VMODE_NONINTERLACED;
-	if (hw->vid_mode & VMO_INTER)
-		var->vmode |= FB_VMODE_INTERLACED;
-	if (hw->vid_mode & VMO_DOUBLE)
-		var->vmode |= FB_VMODE_DOUBLE;
-	
-	/* visible y resolution:
-	 * Graphics display starts at line VDB and ends at line
-	 * VDE. If interlace mode off unit of VC-registers is
-	 * half lines, else lines.
-	 */
-	var->yres = hw->vde - hw->vdb;
-	if (!(var->vmode & FB_VMODE_INTERLACED))
-		var->yres >>= 1;
-	if (var->vmode & FB_VMODE_DOUBLE)
-		var->yres >>= 1;
-
-	/* to get bpp, we must examine f_shift and st_shift.
-	 * f_shift is valid if any of bits no. 10, 8 or 4
-	 * is set. Priority in f_shift is: 10 ">" 8 ">" 4, i.e.
-	 * if bit 10 set then bit 8 and bit 4 don't care...
-	 * If all these bits are 0 get display depth from st_shift
-	 * (as for ST and STE)
-	 */
-	if (hw->f_shift & 0x400)		/* 2 colors */
-		var->bits_per_pixel = 1;
-	else if (hw->f_shift & 0x100)	/* hicolor */
-		var->bits_per_pixel = 16;
-	else if (hw->f_shift & 0x010)	/* 8 bitplanes */
-		var->bits_per_pixel = 8;
-	else if (hw->st_shift == 0)
-		var->bits_per_pixel = 4;
-	else if (hw->st_shift == 0x100)
-		var->bits_per_pixel = 2;
-	else /* if (hw->st_shift == 0x200) */
-		var->bits_per_pixel = 1;
-
-	var->xres = hw->line_width * 16 / var->bits_per_pixel;
-	var->xres_virtual = var->xres + hw->line_offset * 16 / var->bits_per_pixel;
-	if (hw->xoffset)
-		var->xres_virtual += 16;
-
-	if (var->bits_per_pixel == 16) {
-		var->red.offset=11;
-		var->red.length=5;
-		var->red.msb_right=0;
-		var->green.offset=5;
-		var->green.length=6;
-		var->green.msb_right=0;
-		var->blue.offset=0;
-		var->blue.length=5;
-		var->blue.msb_right=0;
-	}
-	else {
-		var->red.offset=0;
-		var->red.length = hw->ste_mode ? 4 : 6;
-		var->red.msb_right=0;
-		var->grayscale=0;
-		var->blue=var->green=var->red;
-	}
-	var->transp.offset=0;
-	var->transp.length=0;
-	var->transp.msb_right=0;
-
-	linelen = var->xres_virtual * var->bits_per_pixel / 8;
-	if (screen_len)
-		if (par->yres_virtual)
-			var->yres_virtual = par->yres_virtual;
-		else
-			/* yres_virtual==0 means use maximum */
-			var->yres_virtual = screen_len / linelen;
-	else {
-		if (hwscroll < 0)
-			var->yres_virtual = 2 * var->yres;
-		else
-			var->yres_virtual=var->yres+hwscroll * 16;
-	}
-	var->xoffset=0; /* TODO change this */
-
-	/* hdX-offsets */
-	prescale = hxx_prescale(hw);
-	plen = 4 >> (hw->vid_mode >> 2 & 0x3);
-	base_off = hw->vid_control & VCO_SHORTOFFS ? 64 : 128;
-	if (hw->f_shift & 0x100) {
-		hde_off = 0;
-		hdb_off = (base_off + 16 * plen) + prescale;
-	}
-	else {
-		hde_off = ((128 / var->bits_per_pixel + 2) * plen);
-		if (hw->ste_mode)
-			hdb_off = (64 + base_off + (128 / var->bits_per_pixel + 2) * plen)
-					 + prescale;
-		else
-			hdb_off = (base_off + (128 / var->bits_per_pixel + 18) * plen)
-					 + prescale;
-	}
-
-	/* Right margin includes hsync */
-	var->left_margin = hdb_off + prescale * ((hw->hdb & 0x1ff) -
-					   (hw->hdb & 0x200 ? 2+hw->hht : 0));
-	if (hw->ste_mode || mon_type!=F_MON_VGA)
-		var->right_margin = prescale * (hw->hht + 2 - hw->hde) - hde_off;
-	else
-		/* can't use this in ste_mode, because hbb is +1 off */
-		var->right_margin = prescale * (hw->hht + 2 - hw->hbb);
-	var->hsync_len = prescale * (hw->hht + 2 - hw->hss);
-
-	/* Lower margin includes vsync */
-	var->upper_margin = hw->vdb / 2 ;  /* round down to full lines */
-	var->lower_margin = (hw->vft+1 - hw->vde + 1) / 2; /* round up */
-	var->vsync_len    = (hw->vft+1 - hw->vss + 1) / 2; /* round up */
-	if (var->vmode & FB_VMODE_INTERLACED) {
-		var->upper_margin *= 2;
-		var->lower_margin *= 2;
-		var->vsync_len *= 2;
-	}
-	else if (var->vmode & FB_VMODE_DOUBLE) {
-		var->upper_margin = (var->upper_margin + 1) / 2;
-		var->lower_margin = (var->lower_margin + 1) / 2;
-		var->vsync_len = (var->vsync_len + 1) / 2;
-	}
-
-	var->pixclock *= plen;
-	var->left_margin /= plen;
-	var->right_margin /= plen;
-	var->hsync_len /= plen;
-
-	var->right_margin -= var->hsync_len;
-	var->lower_margin -= var->vsync_len;
-
-	if (screen_base)
-		var->yoffset=(par->screen_base - screen_base)/linelen;
-	else
-		var->yoffset=0;
-	var->nonstd=0;	/* what is this for? */
-	var->activate=0;
-	for (i=0; i<arraysize(var->reserved); i++)
-		var->reserved[i]=0;
-	return 0;
-}
-
-
-static int f_change_mode = 0;
-static struct falcon_hw f_new_mode;
-static int f_pan_display = 0;
-
-static void falcon_get_par( struct atari_fb_par *par )
-{
-	unsigned long addr;
-	struct falcon_hw *hw = &par->hw.falcon;
-
-	hw->line_width = shifter_f030.scn_width;
-	hw->line_offset = shifter_f030.off_next;
-	hw->st_shift = videl.st_shift & 0x300;
-	hw->f_shift = videl.f_shift;
-	hw->vid_control = videl.control;
-	hw->vid_mode = videl.mode;
-	hw->sync = shifter.syncmode & 0x1;
-	hw->xoffset = videl.xoffset & 0xf;
-	hw->hht = videl.hht;
-	hw->hbb = videl.hbb;
-	hw->hbe = videl.hbe;
-	hw->hdb = videl.hdb;
-	hw->hde = videl.hde;
-	hw->hss = videl.hss;
-	hw->vft = videl.vft;
-	hw->vbb = videl.vbb;
-	hw->vbe = videl.vbe;
-	hw->vdb = videl.vdb;
-	hw->vde = videl.vde;
-	hw->vss = videl.vss;
-
-	addr = (shifter.bas_hi & 0xff) << 16 |
-	       (shifter.bas_md & 0xff) << 8  |
-	       (shifter.bas_lo & 0xff);
-	par->screen_base = PTOV(addr);
-
-	/* derived parameters */
-	hw->ste_mode = (hw->f_shift & 0x510)==0 && hw->st_shift==0x100;
-	hw->mono = (hw->f_shift & 0x400) ||
-	           ((hw->f_shift & 0x510)==0 && hw->st_shift==0x200);
-}
-
-static void falcon_set_par( struct atari_fb_par *par )
-{
-	f_change_mode = 0;
-
-	/* only set screen_base if really necessary */
-	if (current_par.screen_base != par->screen_base)
-		fbhw->set_screen_base(par->screen_base);
-
-	/* Don't touch any other registers if we keep the default resolution */
-	if (DontCalcRes)
-		return;
-
-	/* Tell vbl-handler to change video mode.
-	 * We change modes only on next VBL, to avoid desynchronisation
-	 * (a shift to the right and wrap around by a random number of pixels
-	 * in all monochrome modes).
-	 * This seems to work on my Falcon.
-	 */
-	f_new_mode = par->hw.falcon;
-	f_change_mode = 1;
-}
-
-
-static void falcon_vbl_switcher( int irq, void *dummy, struct pt_regs *fp )
-{
-	struct falcon_hw *hw = &f_new_mode;
-
-	if (f_change_mode) {
-		f_change_mode = 0;
-
-		if (hw->sync & 0x1) {
-			/* Enable external pixelclock. This code only for ScreenWonder */
-			*(volatile unsigned short*)0xffff9202 = 0xffbf;
-		}
-		else {
-			/* Turn off external clocks. Read sets all output bits to 1. */
-			*(volatile unsigned short*)0xffff9202;
-		}
-		shifter.syncmode = hw->sync;
-
-		videl.hht = hw->hht;
-		videl.hbb = hw->hbb;
-		videl.hbe = hw->hbe;
-		videl.hdb = hw->hdb;
-		videl.hde = hw->hde;
-		videl.hss = hw->hss;
-		videl.vft = hw->vft;
-		videl.vbb = hw->vbb;
-		videl.vbe = hw->vbe;
-		videl.vdb = hw->vdb;
-		videl.vde = hw->vde;
-		videl.vss = hw->vss;
-
-		videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
-		if (hw->ste_mode) {
-			videl.st_shift = hw->st_shift; /* write enables STE palette */
-		}
-		else {
-			/* IMPORTANT:
-			 * set st_shift 0, so we can tell the screen-depth if f_shift==0.
-			 * Writing 0 to f_shift enables 4 plane Falcon mode but
-			 * doesn't set st_shift. st_shift!=0 (!=4planes) is impossible
-			 * with Falcon palette.
-			 */
-			videl.st_shift = 0;
-			/* now back to Falcon palette mode */
-			videl.f_shift = hw->f_shift;
-		}
-		/* writing to st_shift changed scn_width and vid_mode */
-		videl.xoffset = hw->xoffset;
-		shifter_f030.scn_width = hw->line_width;
-		shifter_f030.off_next = hw->line_offset;
-		videl.control = hw->vid_control;
-		videl.mode = hw->vid_mode;
-	}
-	if (f_pan_display) {
-		f_pan_display = 0;
-		videl.xoffset = current_par.hw.falcon.xoffset;
-		shifter_f030.off_next = current_par.hw.falcon.line_offset;
-	}
-}
-
-
-static int falcon_pan_display( struct fb_var_screeninfo *var,
-							   struct atari_fb_par *par )
-{
-	int xoffset;
-	int bpp = disp[currcon].var.bits_per_pixel;
-
-	if (bpp == 1)
-		var->xoffset = up(var->xoffset, 32);
-	if (bpp != 16)
-		par->hw.falcon.xoffset = var->xoffset & 15;
-	else {
-		par->hw.falcon.xoffset = 0;
-		var->xoffset = up(var->xoffset, 2);
-	}
-	par->hw.falcon.line_offset = bpp *
-	       	(disp[currcon].var.xres_virtual - disp[currcon].var.xres) / 16;
-	if (par->hw.falcon.xoffset)
-		par->hw.falcon.line_offset -= bpp;
-	xoffset = var->xoffset - par->hw.falcon.xoffset;
-
-	par->screen_base = screen_base +
-	        (var->yoffset * disp[currcon].var.xres_virtual + xoffset) * bpp / 8;
-	if (fbhw->set_screen_base)
-		fbhw->set_screen_base (par->screen_base);
-	else
-		return -EINVAL; /* shouldn't happen */
-	f_pan_display = 1;
-	return 0;
-}
-
-
-static int falcon_getcolreg( unsigned regno, unsigned *red,
-				 unsigned *green, unsigned *blue,
-				 unsigned *transp )
-{	unsigned long col;
-	
-	if (regno > 255)
-		return 1;
-	/* This works in STE-mode (with 4bit/color) since f030_col-registers
-	 * hold up to 6bit/color.
-	 * Even with hicolor r/g/b=5/6/5 bit!
-	 */
-	col = f030_col[regno];
-	*red = (col >> 26) & 0x3f;
-	*green = (col >> 18) & 0x3f;
-	*blue = (col >> 2) & 0x3f;
-	*transp = 0;
-	return 0;
-}
-
-
-static int falcon_setcolreg( unsigned regno, unsigned red,
-							 unsigned green, unsigned blue,
-							 unsigned transp )
-{
-	if (regno > 255)
-		return 1;
-	f030_col[regno] = (red << 26) | (green << 18) | (blue << 2);
-	if (regno < 16) {
-		shifter_tt.color_reg[regno] =
-			(((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
-			(((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
-			((blue & 0xe) >> 1) | ((blue & 1) << 3);
-		packed16_cmap[regno] = (red << 11) | (green << 5) | blue;
-	}
-	return 0;
-}
-
-
-static int falcon_blank( int blank_mode )
-{
-/* ++guenther: we can switch off graphics by changing VDB and VDE,
- * so VIDEL doesn't hog the bus while saving.
- * (this may affect usleep()).
- */
-	int vdb, vss, hbe, hss;
-
-	if (mon_type == F_MON_SM)	/* this doesn't work on SM124 */
-		return 1;
-
-	vdb = current_par.VDB;
-	vss = current_par.VSS;
-	hbe = current_par.HBE;
-	hss = current_par.HSS;
-
-	if (blank_mode >= 1) {
-		/* disable graphics output (this speeds up the CPU) ... */
-		vdb = current_par.VFT + 1;
-		/* ... and blank all lines */
-		hbe = current_par.HHT + 2;
-	}
-	/* use VESA suspend modes on VGA monitors */
-	if (mon_type == F_MON_VGA) {
-		if (blank_mode == 2 || blank_mode == 4)
-			vss = current_par.VFT + 1;
-		if (blank_mode == 3 || blank_mode == 4)
-			hss = current_par.HHT + 2;
-	}
-
-	videl.vdb = vdb;
-	videl.vss = vss;
-	videl.hbe = hbe;
-	videl.hss = hss;
-
-	return 0;
-}
-
- 
-static int falcon_detect( void )
-{
-	struct atari_fb_par par;
-	unsigned char fhw;
-
-	/* Determine connected monitor and set monitor parameters */
-	fhw = *(unsigned char*)0xffff8006;
-	mon_type = fhw >> 6 & 0x3;
-	/* bit 1 of fhw: 1=32 bit ram bus, 0=16 bit */
-	f030_bus_width = fhw << 6 & 0x80;
-	switch (mon_type) {
-	case F_MON_SM:
-		vfmin = 70;
-		vfmax = 72;
-		hfmin = 35713;
-		hfmax = 35715;
-		break;
-	case F_MON_SC:
-	case F_MON_TV:
-		/* PAL...NTSC */
-		vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
-		vfmax = 60;
-		hfmin = 15620;
-		hfmax = 15755;
-		break;
-	}
-	/* initialize hsync-len */
-	f25.hsync = h_syncs[mon_type] / f25.t;
-	f32.hsync = h_syncs[mon_type] / f32.t;
-	if (fext.t)
-		fext.hsync = h_syncs[mon_type] / fext.t;
-
-	falcon_get_par(&par);
-	falcon_encode_var(&atari_fb_predefined[0], &par);
-
-	/* Detected mode is always the "autodetect" slot */
-	return 1;
-}
-
-#endif /* ATAFB_FALCON */
-
-/* ------------------- ST(E) specific functions ---------------------- */
-
-#ifdef ATAFB_STE
-
-static int stste_encode_fix( struct fb_fix_screeninfo *fix,
-							 struct atari_fb_par *par )
-
-{
-	int mode, i;
-
-	strcpy(fix->id,"Atari Builtin");
-	fix->smem_start=real_screen_base;
-	fix->smem_len=screen_len;
-	fix->type=FB_TYPE_INTERLEAVED_PLANES;
-	fix->type_aux=2;
-	fix->visual=FB_VISUAL_PSEUDOCOLOR;
-	mode = par->hw.st.mode & 3;
-	if (mode == ST_HIGH) {
-		fix->type=FB_TYPE_PACKED_PIXELS;
-		fix->type_aux=0;
-		fix->visual=FB_VISUAL_MONO10;
-	}
-	if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
-		fix->xpanstep = 16;
-		fix->ypanstep = 1;
-	} else {
-		fix->xpanstep = 0;
-		fix->ypanstep = 0;
-	}
-	fix->ywrapstep = 0;
-	fix->line_length = 0;
-	for (i=0; i<arraysize(fix->reserved); i++)
-		fix->reserved[i]=0;
-	return 0;
-}
-
-
-static int stste_decode_var( struct fb_var_screeninfo *var,
-						  struct atari_fb_par *par )
-{
-	int xres=var->xres;
-	int yres=var->yres;
-	int bpp=var->bits_per_pixel;
-	int linelen;
-	int yres_virtual = var->yres_virtual;
-
-	if (mono_moni) {
-		if (bpp > 1 || xres > sttt_xres || yres > st_yres)
-			return -EINVAL;
-		par->hw.st.mode=ST_HIGH;
-		xres=sttt_xres;
-		yres=st_yres;
-		bpp=1;
-	} else {
-		if (bpp > 4 || xres > sttt_xres || yres > st_yres)
-			return -EINVAL;
-		if (bpp > 2) {
-			if (xres > sttt_xres/2 || yres > st_yres/2)
-				return -EINVAL;
-			par->hw.st.mode=ST_LOW;
-			xres=sttt_xres/2;
-			yres=st_yres/2;
-			bpp=4;
-		}
-		else if (bpp > 1) {
-			if (xres > sttt_xres || yres > st_yres/2)
-				return -EINVAL;
-			par->hw.st.mode=ST_MID;
-			xres=sttt_xres;
-			yres=st_yres/2;
-			bpp=2;
-		}
-		else
-			return -EINVAL;
-	}
-	if (yres_virtual <= 0)
-		yres_virtual = 0;
-	else if (yres_virtual < yres)
-		yres_virtual = yres;
-	if (var->sync & FB_SYNC_EXT)
-		par->hw.st.sync=(par->hw.st.sync & ~1) | 1;
-	else
-		par->hw.st.sync=(par->hw.st.sync & ~1);
-	linelen=xres*bpp/8;
-	if (yres_virtual * linelen > screen_len && screen_len)
-		return -EINVAL;
-	if (yres * linelen > screen_len && screen_len)
-		return -EINVAL;
-	if (var->yoffset + yres > yres_virtual && yres_virtual)
-		return -EINVAL;
-	par->yres_virtual = yres_virtual;
-	par->screen_base=screen_base+ var->yoffset*linelen;
-	return 0;
-}
-
-static int stste_encode_var( struct fb_var_screeninfo *var,
-						  struct atari_fb_par *par )
-{
-	int linelen, i;
-	var->red.offset=0;
-	var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
-	var->red.msb_right=0;
-	var->grayscale=0;
-
-	var->pixclock=31041;
-	var->left_margin=120;		/* these are incorrect */
-	var->right_margin=100;
-	var->upper_margin=8;
-	var->lower_margin=16;
-	var->hsync_len=140;
-	var->vsync_len=30;
-
-	var->height=-1;
-	var->width=-1;
-
-	if (!(par->hw.st.sync & 1))
-		var->sync=0;
-	else
-		var->sync=FB_SYNC_EXT;
-
-	switch (par->hw.st.mode & 3) {
-	case ST_LOW:
-		var->xres=sttt_xres/2;
-		var->yres=st_yres/2;
-		var->bits_per_pixel=4;
-		break;
-	case ST_MID:
-		var->xres=sttt_xres;
-		var->yres=st_yres/2;
-		var->bits_per_pixel=2;
-		break;
-	case ST_HIGH:
-		var->xres=sttt_xres;
-		var->yres=st_yres;
-		var->bits_per_pixel=1;
-		break;
-	}		
-	var->blue=var->green=var->red;
-	var->transp.offset=0;
-	var->transp.length=0;
-	var->transp.msb_right=0;
-	var->xres_virtual=sttt_xres_virtual;
-	linelen=var->xres_virtual * var->bits_per_pixel / 8;
-	ovsc_addlen=linelen*(sttt_yres_virtual - st_yres);
-	
-	if (! use_hwscroll)
-		var->yres_virtual=var->yres;
-	else if (screen_len)
-		if (par->yres_virtual)
-			var->yres_virtual = par->yres_virtual;
-		else
-			/* yres_virtual==0 means use maximum */
-			var->yres_virtual = screen_len / linelen;
-	else {
-		if (hwscroll < 0)
-			var->yres_virtual = 2 * var->yres;
-		else
-			var->yres_virtual=var->yres+hwscroll * 16;
-	}
-	var->xoffset=0;
-	if (screen_base)
-		var->yoffset=(par->screen_base - screen_base)/linelen;
-	else
-		var->yoffset=0;
-	var->nonstd=0;
-	var->activate=0;
-	var->vmode=FB_VMODE_NONINTERLACED;
-	for (i=0; i<arraysize(var->reserved); i++)
-		var->reserved[i]=0;
-	return 0;
-}
-
-
-static void stste_get_par( struct atari_fb_par *par )
-{
-	unsigned long addr;
-	par->hw.st.mode=shifter_tt.st_shiftmode;
-	par->hw.st.sync=shifter.syncmode;
-	addr = ((shifter.bas_hi & 0xff) << 16) |
-	       ((shifter.bas_md & 0xff) << 8);
-	if (ATARIHW_PRESENT(EXTD_SHIFTER))
-		addr |= (shifter.bas_lo & 0xff);
-	par->screen_base = PTOV(addr);
-}
-
-static void stste_set_par( struct atari_fb_par *par )
-{
-	shifter_tt.st_shiftmode=par->hw.st.mode;
-	shifter.syncmode=par->hw.st.sync;
-	/* only set screen_base if really necessary */
-	if (current_par.screen_base != par->screen_base)
-		fbhw->set_screen_base(par->screen_base);
-}
-
-
-static int stste_getcolreg( unsigned regno, unsigned *red,
-							unsigned *green, unsigned *blue,
-							unsigned *transp )
-{	unsigned col;
-	
-	if (regno > 15)
-		return 1;
-	col = shifter_tt.color_reg[regno];
-	if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
-		*red = ((col >> 7) & 0xe) | ((col >> 11) & 1);
-		*green = ((col >> 3) & 0xe) | ((col >> 7) & 1);
-		*blue = ((col << 1) & 0xe) | ((col >> 3) & 1);
-	}
-	else {
-		*red = (col >> 8) & 0x7;
-		*green = (col >> 4) & 0x7;
-		*blue = col & 0x7;
-	}
-	*transp = 0;
-	return 0;
-}
-
-
-static int stste_setcolreg( unsigned regno, unsigned red,
-						 unsigned green, unsigned blue,
-						 unsigned transp )
-{
-	if (regno > 15)
-		return 1;
-	if (ATARIHW_PRESENT(EXTD_SHIFTER))
-		shifter_tt.color_reg[regno] =
-			(((red & 0xe) >> 1) | ((red & 1) << 3) << 8) |
-			(((green & 0xe) >> 1) | ((green & 1) << 3) << 4) |
-			((blue & 0xe) >> 1) | ((blue & 1) << 3);
-	else
-		shifter_tt.color_reg[regno] =
-			((red & 0x7) << 8) |
-			((green & 0x7) << 4) |
-			(blue & 0x7);
-	return 0;
-}
-
-						  
-static int stste_detect( void )
-
-{	struct atari_fb_par par;
-
-	/* Determine the connected monitor: The DMA sound must be
-	 * disabled before reading the MFP GPIP, because the Sound
-	 * Done Signal and the Monochrome Detect are XORed together!
-	 */
-	if (ATARIHW_PRESENT(PCM_8BIT)) {
-		tt_dmasnd.ctrl = DMASND_CTRL_OFF;
-		udelay(20);	/* wait a while for things to settle down */
-	}
-	mono_moni = (mfp.par_dt_reg & 0x80) == 0;
-
-	stste_get_par(&par);
-	stste_encode_var(&atari_fb_predefined[0], &par);
-
-	if (!ATARIHW_PRESENT(EXTD_SHIFTER))
-		use_hwscroll = 0;
-	return 1;
-}
-
-static void stste_set_screen_base(unsigned long s_base)
-{
-	unsigned long addr;
-	addr= VTOP(s_base);
-	/* Setup Screen Memory */
-	shifter.bas_hi=(unsigned char) ((addr & 0xff0000) >> 16);
-  	shifter.bas_md=(unsigned char) ((addr & 0x00ff00) >> 8);
-	if (ATARIHW_PRESENT(EXTD_SHIFTER))
-		shifter.bas_lo=(unsigned char)  (addr & 0x0000ff);
-}
-
-#endif /* ATAFB_STE */
-
-/* Switching the screen size should be done during vsync, otherwise
- * the margins may get messed up. This is a well known problem of
- * the ST's video system.
- *
- * Unfortunately there is hardly any way to find the vsync, as the
- * vertical blank interrupt is no longer in time on machines with
- * overscan type modifications.
- *
- * We can, however, use Timer B to safely detect the black shoulder,
- * but then we've got to guess an appropriate delay to find the vsync.
- * This might not work on every machine.
- *
- * martin_rogge @ ki.maus.de, 8th Aug 1995
- */
-
-#define LINE_DELAY  (mono_moni ? 30 : 70)
-#define SYNC_DELAY  (mono_moni ? 1500 : 2000)
-
-/* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
-static void st_ovsc_switch(int switchmode)
-{
-    unsigned long flags;
-    register unsigned char old, new;
-
-    if ((switchmode & (SWITCH_ACIA | SWITCH_SND6 | SWITCH_SND7)) == 0)
-	return;
-    save_flags(flags);
-    cli();
-
-    mfp.tim_ct_b = 0x10;
-    mfp.active_edge |= 8;
-    mfp.tim_ct_b = 0;
-    mfp.tim_dt_b = 0xf0;
-    mfp.tim_ct_b = 8;
-    while (mfp.tim_dt_b > 1)	/* TOS does it this way, don't ask why */
-	;
-    new = mfp.tim_dt_b;
-    do {
-	udelay(LINE_DELAY);
-	old = new;
-	new = mfp.tim_dt_b;
-    } while (old != new);
-    mfp.tim_ct_b = 0x10;
-    udelay(SYNC_DELAY);
-
-    if (switchmode == SWITCH_ACIA)
-	acia.key_ctrl = (ACIA_DIV64|ACIA_D8N1S|ACIA_RHTID|ACIA_RIE);
-    else {
-	sound_ym.rd_data_reg_sel = 14;
-	sound_ym.wd_data = sound_ym.rd_data_reg_sel | switchmode;
-    }
-    restore_flags(flags);
-}
-
-/* ------------------- External Video ---------------------- */
-
-#ifdef ATAFB_EXT
-
-static int ext_encode_fix( struct fb_fix_screeninfo *fix,
-						   struct atari_fb_par *par )
-
-{
-	int i;
-
-	strcpy(fix->id,"Unknown Extern");
-	fix->smem_start=external_addr;
-	fix->smem_len=(external_len + PAGE_SIZE -1) & PAGE_MASK;
-	if (external_depth == 1) {
-		fix->type = FB_TYPE_PACKED_PIXELS;
-		/* The letters 'n' and 'i' in the "atavideo=external:" stand
-		 * for "normal" and "inverted", rsp., in the monochrome case */
-		fix->visual =
-			(external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
-			 external_pmode == FB_TYPE_PACKED_PIXELS) ?
-				FB_VISUAL_MONO10 :
-					FB_VISUAL_MONO01;
-	}
-	else {
-		switch (external_pmode) {
-			/* All visuals are STATIC, because we don't know how to change
-			 * colors :-(
-			 */
-		    case -1:              /* truecolor */
-			fix->type=FB_TYPE_PACKED_PIXELS;
-			fix->visual=FB_VISUAL_TRUECOLOR;
-			break;
-		    case FB_TYPE_PACKED_PIXELS:
-			fix->type=FB_TYPE_PACKED_PIXELS;
-			fix->visual=FB_VISUAL_STATIC_PSEUDOCOLOR;
-			break;
-		    case FB_TYPE_PLANES:
-			fix->type=FB_TYPE_PLANES;
-			fix->visual=FB_VISUAL_STATIC_PSEUDOCOLOR;
-			break;
-		    case FB_TYPE_INTERLEAVED_PLANES:
-			fix->type=FB_TYPE_INTERLEAVED_PLANES;
-			fix->type_aux=2;
-			fix->visual=FB_VISUAL_STATIC_PSEUDOCOLOR;
-			break;
-		}
-	}
-	fix->xpanstep = 0;
-	fix->ypanstep = 0;
-	fix->ywrapstep = 0;
-	fix->line_length = 0;
-	for (i=0; i<arraysize(fix->reserved); i++)
-		fix->reserved[i]=0;
-	return 0;
-}
-
-
-static int ext_decode_var( struct fb_var_screeninfo *var,
-						   struct atari_fb_par *par )
-{
-	struct fb_var_screeninfo *myvar = &atari_fb_predefined[0];
-	
-	if (var->bits_per_pixel > myvar->bits_per_pixel ||
-		var->xres > myvar->xres ||
-		var->yres > myvar->yres ||
-		var->xoffset > 0 ||
-		var->yoffset > 0)
-		return -EINVAL;
-	return 0;
-}
-
-
-static int ext_encode_var( struct fb_var_screeninfo *var,
-						   struct atari_fb_par *par )
-{
-	int i;
-
-	var->red.offset=0;
-	var->red.length=(external_pmode == -1) ? external_depth/3 : 
-			(external_vgaiobase ? external_bitspercol : 0);
-	var->red.msb_right=0;
-	var->grayscale=0;
-
-	var->pixclock=31041;
-	var->left_margin=120;		/* these are surely incorrect 	*/
-	var->right_margin=100;
-	var->upper_margin=8;
-	var->lower_margin=16;
-	var->hsync_len=140;
-	var->vsync_len=30;
-
-	var->height=-1;
-	var->width=-1;
-
-	var->sync=0;
-
-	var->xres = external_xres;
-	var->yres = external_yres;
-	var->bits_per_pixel = external_depth;
-	
-	var->blue=var->green=var->red;
-	var->transp.offset=0;
-	var->transp.length=0;
-	var->transp.msb_right=0;
-	var->xres_virtual=var->xres;
-	var->yres_virtual=var->yres;
-	var->xoffset=0;
-	var->yoffset=0;
-	var->nonstd=0;
-	var->activate=0;
-	var->vmode=FB_VMODE_NONINTERLACED;
-	for (i=0; i<arraysize(var->reserved); i++)
-		var->reserved[i]=0;
-	return 0;
-}
-
-
-static void ext_get_par( struct atari_fb_par *par )
-{
-	par->screen_base = external_addr;
-}
-
-static void ext_set_par( struct atari_fb_par *par )
-{
-}
-
-#define OUTB(port,val) \
-	*((unsigned volatile char *) ((port)+external_vgaiobase))=(val)
-#define INB(port) \
-	(*((unsigned volatile char *) ((port)+external_vgaiobase)))
-#define DACDelay 				\
-	do {					\
-		unsigned char tmp=INB(0x3da);	\
-		tmp=INB(0x3da);			\
-	} while (0)
-
-static int ext_getcolreg( unsigned regno, unsigned *red,
-						  unsigned *green, unsigned *blue,
-						  unsigned *transp )
-
-{	unsigned char colmask = (1 << external_bitspercol) - 1;
-		
-	if (! external_vgaiobase)
-		return 1;
-
-	switch (external_card_type) {
-	  case IS_VGA:
-	    OUTB(0x3c7, regno);
-	    DACDelay;
-	    *red=INB(0x3c9) & colmask;
-	    DACDelay;
-	    *green=INB(0x3c9) & colmask;
-	    DACDelay;
-	    *blue=INB(0x3c9) & colmask;
-	    DACDelay;
-	    return 0;
-	    
-	  case IS_MV300:
-	    *red = MV300_color[regno].red;
-	    *green = MV300_color[regno].green;
-	    *blue = MV300_color[regno].blue;
-	    *transp=0;
-	    return 0;
-
-	  default:
-	    return 1;
-	  }
-}
-	
-static int ext_setcolreg( unsigned regno, unsigned red,
-						  unsigned green, unsigned blue,
-						  unsigned transp )
-
-{	unsigned char colmask = (1 << external_bitspercol) - 1;
-
-	if (! external_vgaiobase)
-		return 1;
-
-	switch (external_card_type) {
-	  case IS_VGA:
-	    OUTB(0x3c8, regno);
-	    DACDelay;
-	    OUTB(0x3c9, red & colmask);
-	    DACDelay;
-	    OUTB(0x3c9, green & colmask);
-	    DACDelay;
-	    OUTB(0x3c9, blue & colmask);
-	    DACDelay;
-	    return 0;
-
-	  case IS_MV300:
-	    MV300_color[regno].red = red;
-	    MV300_color[regno].green = green;
-	    MV300_color[regno].blue = blue;
-	    OUTB((MV300_reg[regno] << 2)+1, red);
-	    OUTB((MV300_reg[regno] << 2)+1, green);
-	    OUTB((MV300_reg[regno] << 2)+1, blue);
-	    return 0;
-
-	  default:
-	    return 1;
-	  }
-}
-	
-
-static int ext_detect( void )
-
-{
-	struct fb_var_screeninfo *myvar = &atari_fb_predefined[0];
-	struct atari_fb_par dummy_par;
-
-	myvar->xres = external_xres;
-	myvar->yres = external_yres;
-	myvar->bits_per_pixel = external_depth;
-	ext_encode_var(myvar, &dummy_par);
-	return 1;
-}
-
-#endif /* ATAFB_EXT */
-
-/* ------ This is the same for most hardware types -------- */
-
-static void set_screen_base(unsigned long s_base)
-{
-	unsigned long addr;
-	addr= VTOP(s_base);
-	/* Setup Screen Memory */
-	shifter.bas_hi=(unsigned char) ((addr & 0xff0000) >> 16);
-  	shifter.bas_md=(unsigned char) ((addr & 0x00ff00) >> 8);
-  	shifter.bas_lo=(unsigned char)  (addr & 0x0000ff);
-}
-
-
-static int pan_display( struct fb_var_screeninfo *var,
-                        struct atari_fb_par *par )
-{
-	if (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset)
-		return -EINVAL;
-	else
-		var->xoffset = up(var->xoffset, 16);
-	par->screen_base = screen_base +
-	        (var->yoffset * disp[currcon].var.xres_virtual + var->xoffset)
-	        * disp[currcon].var.bits_per_pixel / 8;
-	if (fbhw->set_screen_base)
-		fbhw->set_screen_base (par->screen_base);
-	else
-		return -EINVAL;
-	return 0;
-}
-
-
-/* ------------ Interfaces to hardware functions ------------ */
-
-
-#ifdef ATAFB_TT
-static struct fb_hwswitch tt_switch = {
-	tt_detect, tt_encode_fix, tt_decode_var, tt_encode_var,
-	tt_get_par, tt_set_par, tt_getcolreg, tt_setcolreg,
-	set_screen_base, NULL, pan_display
-};
-#endif
-
-#ifdef ATAFB_FALCON
-static struct fb_hwswitch falcon_switch = {
-	falcon_detect, falcon_encode_fix, falcon_decode_var, falcon_encode_var,
-	falcon_get_par, falcon_set_par, falcon_getcolreg,
-	falcon_setcolreg, set_screen_base, falcon_blank, falcon_pan_display
-};
-#endif
-
-#ifdef ATAFB_STE
-static struct fb_hwswitch st_switch = {
-	stste_detect, stste_encode_fix, stste_decode_var, stste_encode_var,
-	stste_get_par, stste_set_par, stste_getcolreg, stste_setcolreg,
-	stste_set_screen_base, NULL, pan_display
-};
-#endif
-
-#ifdef ATAFB_EXT
-static struct fb_hwswitch ext_switch = {
-	ext_detect, ext_encode_fix, ext_decode_var, ext_encode_var,
-	ext_get_par, ext_set_par, ext_getcolreg, ext_setcolreg, NULL, NULL, NULL
-};
-#endif
-
-
-
-static void atari_fb_get_par( struct atari_fb_par *par )
-{
-	if (current_par_valid) {
-		*par=current_par;
-	}
-	else
-		fbhw->get_par(par);
-}
-
-
-static void atari_fb_set_par( struct atari_fb_par *par )
-{
-	fbhw->set_par(par);
-	current_par=*par;
-	current_par_valid=1;
-}
-
-
-
-/* =========================================================== */
-/* ============== Hardware Independent Functions ============= */
-/* =========================================================== */
-
-
-/* used for hardware scrolling */
-
-static int
-fb_update_var(int con)
-{
-	int off=disp[con].var.yoffset*disp[con].var.xres_virtual*
-			disp[con].var.bits_per_pixel>>3;
-
-	current_par.screen_base=screen_base + off;
-
-	if (fbhw->set_screen_base)
-		fbhw->set_screen_base(current_par.screen_base);
-	return 0;
-}
-
-static int
-do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
-{
-	int err,activate;
-	struct atari_fb_par par;
-	if ((err=fbhw->decode_var(var, &par)))
-		return err;
-	activate=var->activate;
-	if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
-		atari_fb_set_par(&par);
-	fbhw->encode_var(var, &par);
-	var->activate=activate;
-	return 0;
-}
-
-/* Functions for handling colormap */
-
-/* there seems to be a bug in gcc 2.5.8 which inhibits using an other solution */
-/* I always get a sigsegv */
-
-static short red16[]=
-	{ 0x0000,0x0000,0x0000,0x0000,0xc000,0xc000,0xc000,0xc000,
-	  0x8000,0x0000,0x0000,0x0000,0xffff,0xffff,0xffff,0xffff};
-static short green16[]=
-	{ 0x0000,0x0000,0xc000,0xc000,0x0000,0x0000,0xc000,0xc000,
-	  0x8000,0x0000,0xffff,0xffff,0x0000,0x0000,0xffff,0xffff};
-static short blue16[]=
-	{ 0x0000,0xc000,0x0000,0xc000,0x0000,0xc000,0x0000,0xc000,
-	  0x8000,0xffff,0x0000,0xffff,0x0000,0xffff,0x0000,0xffff};
-
-static short red4[]=
-	{ 0x0000,0xc000,0x8000,0xffff};
-static short green4[]=
-	{ 0x0000,0xc000,0x8000,0xffff};
-static short blue4[]=
-	{ 0x0000,0xc000,0x8000,0xffff};
-
-static short red2[]=
-	{ 0x0000,0xffff};
-static short green2[]=
-	{ 0x0000,0xffff};
-static short blue2[]=
-	{ 0x0000,0xffff};
-
-static struct fb_cmap default_16_colors = {
-    0, 16, red16, green16, blue16, NULL
-};
-static struct fb_cmap default_4_colors = {
-    0, 4, red4, green4, blue4, NULL
-};
-static struct fb_cmap default_2_colors = {
-    0, 2, red2, green2, blue2, NULL
-};
-
-static struct fb_cmap *
-get_default_colormap(int bpp)
-{
-	if (bpp == 1)
-		return &default_2_colors;
-	if (bpp == 2)
-		return &default_4_colors;
-	return &default_16_colors;
-}
-
-#define CNVT_TOHW(val,width)	(((val) << (width)) + 0x7fff - (val)) >> 16
-#define CNVT_FROMHW(val,width) ((width)?((((val) << 16) - (val)) / ((1<<(width))-1)):0)
-
-
-static int
-do_fb_get_cmap(struct fb_cmap *cmap, struct fb_var_screeninfo *var, int kspc)
-{
-	int i,start;
-	unsigned short *red,*green,*blue,*transp;
-	unsigned int hred,hgreen,hblue,htransp;
-
-	red=cmap->red;
-	green=cmap->green;
-	blue=cmap->blue;
-	transp=cmap->transp;
-	start=cmap->start;
-	if (start < 0)
-		return EINVAL;
-	for (i=0 ; i < cmap->len ; i++) {
-		if (fbhw->getcolreg(start++, &hred, &hgreen, &hblue, &htransp))
-			return 0;
-		hred=CNVT_FROMHW(hred,var->red.length);
-		hgreen=CNVT_FROMHW(hgreen,var->green.length);
-		hblue=CNVT_FROMHW(hblue,var->blue.length);
-		htransp=CNVT_FROMHW(htransp,var->transp.length);
-		if (kspc) {
-			*red=hred;
-			*green=hgreen;
-			*blue=hblue;
-			if (transp) *transp=htransp;
-		}
-		else {
-			put_user(hred, red);
-			put_user(hgreen, green);
-			put_user(hblue, blue);
-			if (transp) put_user(htransp, transp);
-		}
-		red++;
-		green++;
-		blue++;
-		if (transp) transp++;
-	}
-	return 0;
-}
-
-static int
-do_fb_set_cmap(struct fb_cmap *cmap, struct fb_var_screeninfo *var, int kspc)
-{
-	int i,start;
-	unsigned short *red,*green,*blue,*transp;
-	unsigned int hred,hgreen,hblue,htransp;
-
-	red=cmap->red;
-	green=cmap->green;
-	blue=cmap->blue;
-	transp=cmap->transp;
-	start=cmap->start;
-
-	if (start < 0)
-		return -EINVAL;
-	for (i=0 ; i < cmap->len ; i++) {
-		if (kspc) {
-			hred=*red;
-			hgreen=*green;
-			hblue=*blue;
-			htransp=(transp) ? *transp : 0;
-		}
-		else {
-			get_user(hred, red);
-			get_user(hgreen, green);
-			get_user(hblue, blue);
-			if (transp)
-				get_user(htransp, transp);
-			else
-				htransp = 0;
-		}
-		hred=CNVT_TOHW(hred,var->red.length);
-		hgreen=CNVT_TOHW(hgreen,var->green.length);
-		hblue=CNVT_TOHW(hblue,var->blue.length);
-		htransp=CNVT_TOHW(htransp,var->transp.length);
-		red++;
-		green++;
-		blue++;
-		if (transp) transp++;
-		if (fbhw->setcolreg(start++, hred, hgreen, hblue, htransp))
-			return 0;
-	}
-	return 0;
-}
-
-static void
-do_install_cmap(int con)
-{
-	if (con != currcon)
-		return;
-	if (disp[con].cmap.len)
-		do_fb_set_cmap(&disp[con].cmap, &(disp[con].var), 1);
-	else
-		do_fb_set_cmap(get_default_colormap(
-				disp[con].var.bits_per_pixel), &(disp[con].var), 1);		
-}
-
-static void
-memcpy_fs(int fsfromto, void *to, void *from, int len)
-{
-	switch (fsfromto) {
-	case 0:
-		memcpy(to,from,len);
-		return;
-	case 1:
-		copy_from_user(to,from,len);
-		return;
-	case 2:
-		copy_to_user(to,from,len);
-		return;
-	}
-}
-
-static void
-copy_cmap(struct fb_cmap *from, struct fb_cmap *to, int fsfromto)
-{
-	int size;
-	int tooff=0, fromoff=0;
-
-	if (to->start > from->start)
-		fromoff=to->start-from->start;
-	else
-		tooff=from->start-to->start;			
-	size=to->len-tooff;
-	if (size > from->len-fromoff)
-		size=from->len-fromoff;
-	if (size < 0)
-		return;
-	size*=sizeof(unsigned short);
-	memcpy_fs(fsfromto, to->red+tooff, from->red+fromoff, size);
-	memcpy_fs(fsfromto, to->green+tooff, from->green+fromoff, size);
-	memcpy_fs(fsfromto, to->blue+tooff, from->blue+fromoff, size);
-	if (from->transp && to->transp)
-		memcpy_fs(fsfromto, to->transp+tooff, from->transp+fromoff, size);
-}
- 
-static int
-alloc_cmap(struct fb_cmap *cmap,int len,int transp)
-{
-	int size=len*sizeof(unsigned short);
-	if (cmap->len != len) {
-		if (cmap->red)
-			kfree(cmap->red);
-		if (cmap->green)
-			kfree(cmap->green);
-		if (cmap->blue)
-			kfree(cmap->blue);
-		if (cmap->transp)
-			kfree(cmap->transp);
-		cmap->red=cmap->green=cmap->blue=cmap->transp=NULL;
-		cmap->len=0;
-		if (! len)
-			return 0;
-		if (! (cmap->red=kmalloc(size, GFP_ATOMIC)))
-			return -1;
-		if (! (cmap->green=kmalloc(size, GFP_ATOMIC)))
-			return -1;
-		if (! (cmap->blue=kmalloc(size, GFP_ATOMIC)))
-			return -1;
-		if (transp) {
-			if (! (cmap->transp=kmalloc(size, GFP_ATOMIC)))
-				return -1;
-		}
-		else
-			cmap->transp=NULL;
-	}
-	cmap->start=0;
-	cmap->len=len;
-	copy_cmap(get_default_colormap(len), cmap, 0);
-	return 0;
-}	
-
-static int
-atari_fb_get_fix(struct fb_fix_screeninfo *fix, int con)
-{
-	struct atari_fb_par par;
-	if (con == -1)
-		atari_fb_get_par(&par);
-	else
-		fbhw->decode_var(&disp[con].var,&par);
-	return fbhw->encode_fix(fix, &par);
-}
-	
-static int
-atari_fb_get_var(struct fb_var_screeninfo *var, int con)
-{
-	struct atari_fb_par par;
-	if (con == -1) {
-		atari_fb_get_par(&par);
-		fbhw->encode_var(var, &par);
-	}
-	else
-		*var=disp[con].var;
-	return 0;
-}
-
-static void
-atari_fb_set_disp(int con)
-{
-	struct fb_fix_screeninfo fix;
-
-	atari_fb_get_fix(&fix, con);
-	if (con == -1)
-		con=0;
-	disp[con].screen_base = (u_char *)fix.smem_start;
-	disp[con].visual = fix.visual;
-	disp[con].type = fix.type;
-	disp[con].type_aux = fix.type_aux;
-	disp[con].ypanstep = fix.ypanstep;
-	disp[con].ywrapstep = fix.ywrapstep;
-	disp[con].line_length = fix.line_length;
-	if (fix.visual != FB_VISUAL_PSEUDOCOLOR &&
-		fix.visual != FB_VISUAL_DIRECTCOLOR)
-		disp[con].can_soft_blank = 0;
-	else
-		disp[con].can_soft_blank = 1;
-	disp[con].inverse =
-	    (fix.visual == FB_VISUAL_MONO01 ? !inverse : inverse);
-}
-
-static int
-atari_fb_set_var(struct fb_var_screeninfo *var, int con)
-{
-	int err,oldxres,oldyres,oldbpp,oldxres_virtual,
-	    oldyres_virtual,oldyoffset;
-	if ((err=do_fb_set_var(var, con==currcon)))
-		return err;
-	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
-		oldxres=disp[con].var.xres;
-		oldyres=disp[con].var.yres;
-		oldxres_virtual=disp[con].var.xres_virtual;
-		oldyres_virtual=disp[con].var.yres_virtual;
-		oldbpp=disp[con].var.bits_per_pixel;
-		oldyoffset=disp[con].var.yoffset;
-		disp[con].var=*var;
-		if (oldxres != var->xres || oldyres != var->yres 
-		    || oldxres_virtual != var->xres_virtual
-		    || oldyres_virtual != var->yres_virtual
-		    || oldbpp != var->bits_per_pixel
-		    || oldyoffset != var->yoffset) {
-			atari_fb_set_disp(con);
-			(*fb_info.changevar)(con);
-			alloc_cmap(&disp[con].cmap, 0, 0);
-			do_install_cmap(con);
-		}
-	}
-	var->activate=0;
-	return 0;
-}
-
-
-
-static int
-atari_fb_get_cmap(struct fb_cmap *cmap, int kspc, int con)
-{
-	if (con == currcon) /* current console ? */
-		return do_fb_get_cmap(cmap, &(disp[con].var), kspc);
-	else
-		if (disp[con].cmap.len) /* non default colormap ? */
-			copy_cmap(&disp[con].cmap, cmap, kspc ? 0 : 2);
-		else
-			copy_cmap(get_default_colormap(
-			    disp[con].var.bits_per_pixel), cmap, kspc ? 0 : 2);
-	return 0;
-}
-
-static int
-atari_fb_set_cmap(struct fb_cmap *cmap, int kspc, int con)
-{
-	int err;
-	if (! disp[con].cmap.len) { /* no colormap allocated ? */
-		if ((err = alloc_cmap(&disp[con].cmap, 
-					1 << disp[con].var.bits_per_pixel, 0)))
-		return err;
-	}
-	if (con == currcon) /* current console ? */
-		return do_fb_set_cmap(cmap, &(disp[con].var), kspc);
-	else
-		copy_cmap(cmap, &disp[con].cmap, kspc ? 0 : 1);
-	return 0;
-}
-
-static int
-atari_fb_pan_display(struct fb_var_screeninfo *var, int con)
-{
-	int xoffset = var->xoffset;
-	int yoffset = var->yoffset;
-	int err;
-
-	if (   xoffset < 0 || xoffset + disp[con].var.xres > disp[con].var.xres_virtual
-	    || yoffset < 0 || yoffset + disp[con].var.yres > disp[con].var.yres_virtual)
-		return -EINVAL;
-
-	if (con == currcon) {
-		if (fbhw->pan_display) {
-			if ((err = fbhw->pan_display(var, &current_par)))
-				return err;
-		}
-		else
-			return -EINVAL;
-	}
-	disp[con].var.xoffset = var->xoffset;
-	disp[con].var.yoffset = var->yoffset;
-	return 0;
-}
-
-static int
-atari_fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
-	       unsigned long arg, int con)
-{
-	switch (cmd) {
-#ifdef FBCMD_GET_CURRENTPAR
-	case FBCMD_GET_CURRENTPAR:
-		if (copy_to_user((void *)arg, (void *)&current_par,
-				 sizeof(struct atari_fb_par)))
-			return -EFAULT;
-		return 0;
-#endif
-#ifdef FBCMD_SET_CURRENTPAR
-	case FBCMD_SET_CURRENTPAR:
-		if (copy_from_user((void *)&current_par, (void *)arg,
-				   sizeof(struct atari_fb_par)))
-			return -EFAULT;
-		atari_fb_set_par(&current_par);
-		return 0;
-#endif
-	}
-	return -EINVAL;
-}
-
-static struct fb_ops atari_fb_ops = {
-	atari_fb_get_fix, atari_fb_get_var, atari_fb_set_var, atari_fb_get_cmap,
-	atari_fb_set_cmap, atari_fb_pan_display, atari_fb_ioctl	
-};
-
-static void
-check_default_par( int detected_mode )
-{
-	char default_name[10];
-	int i;
-	struct fb_var_screeninfo var;
-	unsigned long min_mem;
-
-	/* First try the user supplied mode */
-	if (default_par) {
-		var=atari_fb_predefined[default_par-1];
-		var.activate = FB_ACTIVATE_TEST;
-		if (do_fb_set_var(&var,1))
-			default_par=0;		/* failed */
-	}
-	/* Next is the autodetected one */
-	if (! default_par) {
-		var=atari_fb_predefined[detected_mode-1]; /* autodetect */
-		var.activate = FB_ACTIVATE_TEST;
-		if (!do_fb_set_var(&var,1))
-			default_par=detected_mode;
-	}
-	/* If that also failed, try some default modes... */
-	if (! default_par) {
-		/* try default1, default2... */
-		for (i=1 ; i < 10 ; i++) {
-			sprintf(default_name,"default%d",i);
-			default_par=get_video_mode(default_name);
-			if (! default_par)
-				panic("can't set default video mode\n");
-			var=atari_fb_predefined[default_par-1];
-			var.activate = FB_ACTIVATE_TEST;
-			if (! do_fb_set_var(&var,1))
-				break;	/* ok */
-		}
-	}
-	min_mem=var.xres_virtual * var.yres_virtual * var.bits_per_pixel/8;
-	if (default_mem_req < min_mem)
-		default_mem_req=min_mem;
-}
-
-static int
-atafb_switch(int con)
-{
-	/* Do we have to save the colormap ? */
-	if (disp[currcon].cmap.len)
-		do_fb_get_cmap(&disp[currcon].cmap, &(disp[currcon].var), 1);
-	do_fb_set_var(&disp[con].var,1);
-	currcon=con;
-	/* Install new colormap */
-	do_install_cmap(con);
-	return 0;
-}
-
-/* (un)blank/poweroff
- * 0 = unblank
- * 1 = blank
- * 2 = suspend vsync
- * 3 = suspend hsync
- * 4 = off
- */
-static void
-atafb_blank(int blank)
-{
-	unsigned short black[16];
-	struct fb_cmap cmap;
-	if (fbhw->blank && !fbhw->blank(blank))
-		return;
-	if (blank) {
-		memset(black, 0, 16*sizeof(unsigned short));
-		cmap.red=black;
-		cmap.green=black;
-		cmap.blue=black;
-		cmap.transp=NULL;
-		cmap.start=0;
-		cmap.len=16;
-		do_fb_set_cmap(&cmap, &(disp[currcon].var), 1);
-	}
-	else
-		do_install_cmap(currcon);
-}
-
-static int
-atafb_setcmap(struct fb_cmap *cmap, int con)
-{
-	return(atari_fb_set_cmap(cmap, 1, con));
-}
-
-__initfunc(struct fb_info *
-atari_fb_init(long *mem_start))
-{
-	int err;
-	int pad;
-	int detected_mode;
-	unsigned long mem_req;
-	struct fb_var_screeninfo *var;
-	
-	err=register_framebuffer("Atari Builtin", &node, &atari_fb_ops, 
-			num_atari_fb_predefined, atari_fb_predefined);
-	if (err < 0)
-		panic ("Cannot register frame buffer\n");
-	do {
-#ifdef ATAFB_EXT
-		if (external_addr) {
-			fbhw = &ext_switch;
-			break;
-		}
-#endif
-#ifdef ATAFB_TT
-		if (ATARIHW_PRESENT(TT_SHIFTER)) {
-			fbhw = &tt_switch;
-			break;
-		}
-#endif
-#ifdef ATAFB_FALCON
-		if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
-			fbhw = &falcon_switch;
-			request_irq(IRQ_AUTO_4, falcon_vbl_switcher, IRQ_TYPE_PRIO,
-			            "framebuffer/modeswitch", falcon_vbl_switcher);
-			break;
-		}
-#endif
-#ifdef ATAFB_STE
-		if (ATARIHW_PRESENT(STND_SHIFTER) ||
-		    ATARIHW_PRESENT(EXTD_SHIFTER)) {
-			fbhw = &st_switch;
-			break;
-		}
-		fbhw = &st_switch;
-		printk("Cannot determine video hardware; defaulting to ST(e)\n");
-#else /* ATAFB_STE */
-		/* no default driver included */
-		/* Nobody will ever see this message :-) */
-		panic("Cannot initialize video hardware\n");
-#endif
-	} while (0);
-	detected_mode = fbhw->detect();
-	check_default_par(detected_mode);
-#ifdef ATAFB_EXT
-	if (!external_addr) {
-#endif /* ATAFB_EXT */
-		mem_req = default_mem_req + ovsc_offset +
-			ovsc_addlen;
-		mem_req = ((mem_req + PAGE_SIZE - 1) & PAGE_MASK) + PAGE_SIZE;
-		screen_base = (unsigned long) atari_stram_alloc(mem_req, mem_start);
-		memset((char *) screen_base, 0, mem_req);
-		pad = ((screen_base + PAGE_SIZE-1) & PAGE_MASK) - screen_base;
-		screen_base+=pad;
-		real_screen_base=screen_base+ovsc_offset;
-		screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
-		st_ovsc_switch(ovsc_switchmode);
-		if (CPU_IS_040_OR_060) {
-			/* On a '040+, the cache mode of video RAM must be set to
-			 * write-through also for internal video hardware! */
-			cache_push( VTOP(screen_base), screen_len );
-			kernel_set_cachemode( screen_base, screen_len,
-								  KERNELMAP_NO_COPYBACK );
-		}
-#ifdef ATAFB_EXT
-	}
-	else {
-		/* Map the video memory (physical address given) to somewhere
-		 * in the kernel address space.
-		 */
-		*mem_start = (*mem_start+PAGE_SIZE-1) & ~(PAGE_SIZE-1);
-		external_addr = kernel_map(external_addr, external_len,
-									KERNELMAP_NO_COPYBACK, mem_start);
-		if (external_vgaiobase)
-			external_vgaiobase = kernel_map(external_vgaiobase,
-				0x10000, KERNELMAP_NOCACHE_SER, mem_start);
-		screen_base      =
-		real_screen_base = external_addr;
-		screen_len       = external_len & PAGE_MASK;
-		memset ((char *) screen_base, 0, external_len);
-	}
-#endif /* ATAFB_EXT */
-
-	strcpy(fb_info.modename, "Atari Builtin ");
-	fb_info.disp=disp;
-	fb_info.switch_con=&atafb_switch;
-	fb_info.updatevar=&fb_update_var;
-	fb_info.blank=&atafb_blank;
-	fb_info.setcmap=&atafb_setcmap;
-	var=atari_fb_predefined+default_par-1;
-	do_fb_set_var(var,1);
-	strcat(fb_info.modename,fb_var_names[default_par-1][0]);
-
-	atari_fb_get_var(&disp[0].var, -1);
-	atari_fb_set_disp(-1);
-	printk("Determined %dx%d, depth %d\n",
-	       disp[0].var.xres, disp[0].var.yres, disp[0].var.bits_per_pixel );
-	do_install_cmap(0);
-	return &fb_info;
-}
-
-/* a strtok which returns empty strings, too */
-
-static char * strtoke(char * s,const char * ct)
-{
-  char *sbegin, *send;
-  static char *ssave = NULL;
-  
-  sbegin  = s ? s : ssave;
-  if (!sbegin) {
-	  return NULL;
-  }
-  if (*sbegin == '\0') {
-    ssave = NULL;
-    return NULL;
-  }
-  send = strpbrk(sbegin, ct);
-  if (send && *send != '\0')
-    *send++ = '\0';
-  ssave = send;
-  return sbegin;
-}
-
-void atari_video_setup( char *options, int *ints )
-{
-    char *this_opt;
-    int temp;
-    char ext_str[80], int_str[100];
-    char mcap_spec[80];
-    char user_mode[80];
-
-	ext_str[0]          =
-	int_str[0]          =
-	mcap_spec[0]        =
-	user_mode[0]        =
-	fb_info.fontname[0] = '\0';
-
-    if (!options || !*options)
-		return;
-     
-    for(this_opt=strtok(options,","); this_opt; this_opt=strtok(NULL,",")) {
-	if (!*this_opt) continue;
-	if ((temp=get_video_mode(this_opt)))
-		default_par=temp;
-	else if (! strcmp(this_opt, "inverse"))
-		inverse=1;
-	else if (!strncmp(this_opt, "font:", 5))
-	   strcpy(fb_info.fontname, this_opt+5);
-	else if (! strncmp(this_opt, "hwscroll_",9)) {
-		hwscroll=simple_strtoul(this_opt+9, NULL, 10);
-		if (hwscroll < 0)
-			hwscroll = 0;
-		if (hwscroll > 200)
-			hwscroll = 200;
-	}
-	else if (! strncmp(this_opt, "sw_",3)) {
-		if (! strcmp(this_opt+3, "acia"))
-			ovsc_switchmode = SWITCH_ACIA;
-		else if (! strcmp(this_opt+3, "snd6"))
-			ovsc_switchmode = SWITCH_SND6;
-		else if (! strcmp(this_opt+3, "snd7"))
-			ovsc_switchmode = SWITCH_SND7;
-		else ovsc_switchmode = SWITCH_NONE;
-	}
-#ifdef ATAFB_EXT
-	else if (!strcmp(this_opt,"mv300")) {
-		external_bitspercol = 8;
-		external_card_type = IS_MV300;
-	}
-	else if (!strncmp(this_opt,"external:",9))
-		strcpy(ext_str, this_opt+9);
-#endif
-	else if (!strncmp(this_opt,"internal:",9))
-		strcpy(int_str, this_opt+9);
-#ifdef ATAFB_FALCON
-	else if (!strncmp(this_opt, "eclock:", 7)) {
-		fext.f = simple_strtoul(this_opt+7, NULL, 10);
-		/* external pixelclock in kHz --> ps */
-		fext.t = 1000000000/fext.f;
-		fext.f *= 1000;
-	}
-	else if (!strncmp(this_opt, "monitorcap:", 11))
-		strcpy(mcap_spec, this_opt+11);
-#endif
-	else if (!strcmp(this_opt, "keep"))
-		DontCalcRes = 1;
-	else if (!strncmp(this_opt, "R", 1))
-		strcpy(user_mode, this_opt+1);
-    }
-
-    if (*int_str) {
-	/* Format to config extended internal video hardware like OverScan:
-	"<switch-type>,internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
-	Explanation:
-	<switch-type> type to switch on higher resolution
-			sw_acia : via keyboard ACIA
-			sw_snd6 : via bit 6 of the soundchip port
-			sw_snd7 : via bit 7 of the soundchip port
-	<xres>: x-resolution 
-	<yres>: y-resolution
-	The following are only needed if you have an overscan which
-	needs a black border:
-	<xres_max>: max. length of a line in pixels your OverScan hardware would allow
-	<yres_max>: max. number of lines your OverScan hardware would allow
-	<offset>: Offset from physical beginning to visible beginning
-		  of screen in bytes
-	*/
-	int xres;
-	char *p;
-
-	if (!(p = strtoke(int_str, ";")) ||!*p) goto int_invalid;
-	xres = simple_strtoul(p, NULL, 10);
-	if (!(p = strtoke(NULL, ";")) || !*p) goto int_invalid;
-	sttt_xres=xres;
-	tt_yres=st_yres=simple_strtoul(p, NULL, 10);
-	if ((p=strtoke(NULL, ";")) && *p) {
-		sttt_xres_virtual=simple_strtoul(p, NULL, 10);
-	}
-	if ((p=strtoke(NULL, ";")) && *p) {
-		sttt_yres_virtual=simple_strtoul(p, NULL, 0);
-	}
-	if ((p=strtoke(NULL, ";")) && *p) {
-		ovsc_offset=simple_strtoul(p, NULL, 0);
-	}
-
-	if (ovsc_offset || (sttt_yres_virtual != st_yres))
-		use_hwscroll=0;
-    }
-    else 
-      int_invalid:	ovsc_switchmode = SWITCH_NONE;
-
-#ifdef ATAFB_EXT
-    if (*ext_str) {
-	int		xres, yres, depth, planes;
-	unsigned long addr, len;
-	char *p;
-
-	/* Format is: <xres>;<yres>;<depth>;<plane organ.>;
-	 *            <screen mem addr>
-	 *	      [;<screen mem length>[;<vgaiobase>[;<colorreg-type>]]]
-	 */
-	if (!(p = strtoke(ext_str, ";")) ||!*p) goto ext_invalid;
-	xres = simple_strtoul(p, NULL, 10);
-	if (xres <= 0) goto ext_invalid;
-
-	if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
-	yres = simple_strtoul(p, NULL, 10);
-	if (yres <= 0) goto ext_invalid;
-
-	if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
-	depth = simple_strtoul(p, NULL, 10);
-	if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
-		depth != 16 && depth != 24) goto ext_invalid;
-
-	if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
-	if (*p == 'i')
-		planes = FB_TYPE_INTERLEAVED_PLANES;
-	else if (*p == 'p')
-		planes = FB_TYPE_PACKED_PIXELS;
-	else if (*p == 'n')
-		planes = FB_TYPE_PLANES;
-	else if (*p == 't')
-		planes = -1; /* true color */
-	else
-		goto ext_invalid;
-
-
-	if (!(p = strtoke(NULL, ";")) ||!*p) goto ext_invalid;
-	addr = simple_strtoul(p, NULL, 0);
-
-	if (!(p = strtoke(NULL, ";")) ||!*p)
-		len = xres*yres*depth/8;
-	else
-		len = simple_strtoul(p, NULL, 0);
-
-	if ((p = strtoke(NULL, ";")) && *p)
-		external_vgaiobase=simple_strtoul(p, NULL, 0);
-
-	if ((p = strtoke(NULL, ";")) && *p) {
-		external_bitspercol = simple_strtoul(p, NULL, 0);
-		if (external_bitspercol > 8)
-			external_bitspercol = 8;
-		else if (external_bitspercol < 1)
-			external_bitspercol = 1;
-	}
-	
-	if ((p = strtoke(NULL, ";")) && *p) {
-		if (!strcmp(this_opt, "vga"))
-			external_card_type = IS_VGA;
-		if (!strcmp(this_opt, "mv300"))
-			external_card_type = IS_MV300;
-	}
-
-	external_xres  = xres;
-	external_yres  = yres;
-	external_depth = depth;
-	external_pmode = planes;
-	external_addr  = addr;
-	external_len   = len;
-		
-	if (external_card_type == IS_MV300)
-	  switch (external_depth) {
-	    case 1:
-	      MV300_reg = MV300_reg_1bit;
-	      break;
-	    case 4:
-	      MV300_reg = MV300_reg_4bit;
-	      break;
-	    case 8:
-	      MV300_reg = MV300_reg_8bit;
-	      break;
-	    }
-
-      ext_invalid:
-	;
-    }
-#endif /* ATAFB_EXT */
-
-#ifdef ATAFB_FALCON
-    if (*mcap_spec) {
-	char *p;
-	int vmin, vmax, hmin, hmax;
-
-	/* Format for monitor capabilities is: <Vmin>;<Vmax>;<Hmin>;<Hmax>
-	 * <V*> vertical freq. in Hz
-	 * <H*> horizontal freq. in kHz
-	 */
-	if (!(p = strtoke(mcap_spec, ";")) || !*p) goto cap_invalid;
-	vmin = simple_strtoul(p, NULL, 10);
-	if (vmin <= 0) goto cap_invalid;
-	if (!(p = strtoke(NULL, ";")) || !*p) goto cap_invalid;
-	vmax = simple_strtoul(p, NULL, 10);
-	if (vmax <= 0 || vmax <= vmin) goto cap_invalid;
-	if (!(p = strtoke(NULL, ";")) || !*p) goto cap_invalid;
-	hmin = 1000 * simple_strtoul(p, NULL, 10);
-	if (hmin <= 0) goto cap_invalid;
-	if (!(p = strtoke(NULL, "")) || !*p) goto cap_invalid;
-	hmax = 1000 * simple_strtoul(p, NULL, 10);
-	if (hmax <= 0 || hmax <= hmin) goto cap_invalid;
-
-	vfmin = vmin;
-	vfmax = vmax;
-	hfmin = hmin;
-	hfmax = hmax;
-      cap_invalid:
-	;
-    }
-#endif
-
-	if (*user_mode) {
-		/* Format of user defined video mode is: <xres>;<yres>;<depth>
-		 */
-		char *p;
-		int xres, yres, depth, temp;
-
-		if (!(p = strtoke(user_mode, ";")) || !*p) goto user_invalid;
-		xres = simple_strtoul(p, NULL, 10);
-		if (!(p = strtoke(NULL, ";")) || !*p) goto user_invalid;
-		yres = simple_strtoul(p, NULL, 10);
-		if (!(p = strtoke(NULL, "")) || !*p) goto user_invalid;
-		depth = simple_strtoul(p, NULL, 10);
-		if ((temp=get_video_mode("user0"))) {
-			default_par=temp;
-			atari_fb_predefined[default_par-1].xres = xres;
-			atari_fb_predefined[default_par-1].yres = yres;
-			atari_fb_predefined[default_par-1].bits_per_pixel = depth;
-		}
-
-	  user_invalid:
-		;
-	}
-}
diff --git a/arch/m68k/atari/atafb.h b/arch/m68k/atari/atafb.h
deleted file mode 100644
index 2bacb7027..000000000
--- a/arch/m68k/atari/atafb.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#include <linux/fb.h>
-#include <linux/console.h>
-
-
-struct display
-{
-    int bytes_per_row;		/* offset to one line below */
-
-    int cursor_x;		/* current cursor position */
-    int cursor_y;
-
-    int fgcol;			/* text colors */
-    int bgcol;
-
-    struct fb_var_screeninfo var;	/* variable infos */
-    struct fb_cmap	cmap;		/* colormap */
-  
-    /* the following three are copies from fb_fix_screeninfo */
-    int visual;
-    int type;
-    int type_aux;
-
-    u_char *bitplane;	        /* pointer to top of physical screen */
-
-    u_char *screen_base;	/* pointer to top of virtual screen */    
-
-    u_char *fontdata;           /* Font associated to this display */
-    int fontheight;
-    int fontwidth;
-
-    int inverse;		/* != 0 text black on white as default */
-    struct vc_data *conp;	/* pointer to console data */
-    struct display_switch *dispsw; /* pointers to depth specific functions */
-}; 
-
-struct fb_info
-{
-    char modename[40];		/* name of the at boottime detected video mode */
-    struct display *disp;	/* pointer to display variables */
-    int (*changevar)(int);	/* tell the console var has changed */
-    int (*switch_con)(int);	/* tell the framebuffer to switch consoles */
-    int (*updatevar)(int);	/* tell the framebuffer to update the vars */
-    void (*blank)(int);		/* tell the framebuffer to (un)blank the screen */
-};
-
-struct fb_info *atafb_init(long *);
-
-