m68k: Atari fb revival

Update the atari fb to 2.6 by Michael Schmitz,
Reformatting and rewrite of bit plane functions by Roman Zippel,
A few more fixes by Geert Uytterhoeven.

Signed-off-by: Michael Schmitz <[e-mail]>
Signed-off-by: Roman Zippel <[e-mail]>
Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/video/Kconfig

···
 
 config FB_ATARI
 	bool "Atari native chipset support"
-	depends on (FB = y) && ATARI && BROKEN
+	depends on (FB = y) && ATARI
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
 	help
 	  This is the frame buffer device driver for the builtin graphics
 	  chipset found in Ataris.

drivers/video/Makefile

···
 obj-$(CONFIG_FB_LEO)              += leo.o sbuslib.o
 obj-$(CONFIG_FB_SGIVW)            += sgivwfb.o
 obj-$(CONFIG_FB_ACORN)            += acornfb.o
-obj-$(CONFIG_FB_ATARI)            += atafb.o
+obj-$(CONFIG_FB_ATARI)            += atafb.o c2p.o atafb_mfb.o \
+                                     atafb_iplan2p2.o atafb_iplan2p4.o atafb_iplan2p8.o
 obj-$(CONFIG_FB_MAC)              += macfb.o
 obj-$(CONFIG_FB_HGA)              += hgafb.o
 obj-$(CONFIG_FB_IGA)              += igafb.o

drivers/video/atafb.c

···
  * linux/drivers/video/atafb.c -- Atari builtin chipset 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.
···
 #include <linux/fb.h>
 #include <asm/atarikb.h>
 
-#include <video/fbcon.h>
-#include <video/fbcon-cfb8.h>
-#include <video/fbcon-cfb16.h>
-#include <video/fbcon-iplan2p2.h>
-#include <video/fbcon-iplan2p4.h>
-#include <video/fbcon-iplan2p8.h>
-#include <video/fbcon-mfb.h>
-
+#include "c2p.h"
+#include "atafb.h"
 
 #define SWITCH_ACIA 0x01		/* modes for switch on OverScan */
 #define SWITCH_SND6 0x40
···
 
 #define up(x, r) (((x) + (r) - 1) & ~((r)-1))
 
+	/*
+	 * Interface to the world
+	 */
 
-static int default_par=0;	/* default resolution (0=none) */
+static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
+static int atafb_set_par(struct fb_info *info);
+static int atafb_setcolreg(unsigned int regno, unsigned int red, unsigned int green,
+			   unsigned int blue, unsigned int transp,
+			   struct fb_info *info);
+static int atafb_blank(int blank, struct fb_info *info);
+static int atafb_pan_display(struct fb_var_screeninfo *var,
+			     struct fb_info *info);
+static void atafb_fillrect(struct fb_info *info,
+			   const struct fb_fillrect *rect);
+static void atafb_copyarea(struct fb_info *info,
+			   const struct fb_copyarea *region);
+static void atafb_imageblit(struct fb_info *info, const struct fb_image *image);
+static int atafb_ioctl(struct fb_info *info, unsigned int cmd,
+		       unsigned long arg);
 
-static unsigned long default_mem_req=0;
 
-static int hwscroll=-1;
+static int default_par;		/* default resolution (0=none) */
+
+static unsigned long default_mem_req;
+
+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;
+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, ovsc_addlen;
+
+	/*
+	 * Hardware parameters for current mode
+	 */
 
 static struct atafb_par {
 	void *screen_base;
 	int yres_virtual;
+	u_long next_line;
+	u_long next_plane;
 #if defined ATAFB_TT || defined ATAFB_STE
 	union {
 		struct {
···
 /* 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; 
+static int DontCalcRes = 0;
 
 #ifdef ATAFB_FALCON
 #define HHT hw.falcon.hht
···
 #define VMO_PREMASK		0x0c
 #endif
 
-static struct fb_info fb_info;
+static struct fb_info fb_info = {
+	.fix = {
+		.id	= "Atari ",
+		.visual	= FB_VISUAL_PSEUDOCOLOR,
+		.accel	= FB_ACCEL_NONE,
+	}
+};
 
 static void *screen_base;	/* base address of screen */
 static void *real_screen_base;	/* (only for Overscan) */
 
 static int screen_len;
 
-static int current_par_valid=0; 
+static int current_par_valid;
 
-static int mono_moni=0;
-
-static struct display disp;
+static int mono_moni;
 
 
 #ifdef ATAFB_EXT
+
 /* external video handling */
+static unsigned int external_xres;
+static unsigned int external_xres_virtual;
+static unsigned int external_yres;
 
-static unsigned			external_xres;
-static unsigned			external_xres_virtual;
-static unsigned			external_yres;
-/* not needed - atafb will never support panning/hardwarescroll with external
- * static unsigned		external_yres_virtual;	
-*/
+/*
+ * not needed - atafb will never support panning/hardwarescroll with external
+ * static unsigned int external_yres_virtual;
+ */
+static unsigned int external_depth;
+static int external_pmode;
+static void *external_addr;
+static unsigned long external_len;
+static unsigned long external_vgaiobase;
+static unsigned int external_bitspercol = 6;
 
-static unsigned			external_depth;
-static int				external_pmode;
-static void *external_addr = 0;
-static unsigned long	external_len;
-static unsigned long	external_vgaiobase = 0;
-static unsigned int		external_bitspercol = 6;
-
-/* 
-JOE <[e-mail]>: 
-added card type for external driver, is only needed for
-colormap handling.
-*/
-
+/*
+ * JOE <[e-mail]>:
+ * 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 access 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 }; 
+ * The MV300 mixes the color registers. So we need an array of munged
+ * indices in order to access 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; } ext_color[256];
 #endif /* ATAFB_EXT */
 
 
-static int inverse=0;
+static int inverse;
 
 extern int fontheight_8x8;
 extern int fontwidth_8x8;
···
 extern int fontwidth_8x16;
 extern unsigned char fontdata_8x16[];
 
+/*
+ * struct fb_ops {
+ *	* open/release and usage marking
+ *	struct module *owner;
+ *	int (*fb_open)(struct fb_info *info, int user);
+ *	int (*fb_release)(struct fb_info *info, int user);
+ *
+ *	* For framebuffers with strange non linear layouts or that do not
+ *	* work with normal memory mapped access
+ *	ssize_t (*fb_read)(struct file *file, char __user *buf, size_t count, loff_t *ppos);
+ *	ssize_t (*fb_write)(struct file *file, const char __user *buf, size_t count, loff_t *ppos);
+ *
+ *	* checks var and eventually tweaks it to something supported,
+ *	* DOES NOT MODIFY PAR *
+ *	int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
+ *
+ *	* set the video mode according to info->var *
+ *	int (*fb_set_par)(struct fb_info *info);
+ *
+ *	* set color register *
+ *	int (*fb_setcolreg)(unsigned int regno, unsigned int red, unsigned int green,
+ *			    unsigned int blue, unsigned int transp, struct fb_info *info);
+ *
+ *	* set color registers in batch *
+ *	int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
+ *
+ *	* blank display *
+ *	int (*fb_blank)(int blank, struct fb_info *info);
+ *
+ *	* pan display *
+ *	int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
+ *
+ *	*** The meat of the drawing engine ***
+ *	* Draws a rectangle *
+ *	void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
+ *	* Copy data from area to another *
+ *	void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
+ *	* Draws a image to the display *
+ *	void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
+ *
+ *	* Draws cursor *
+ *	int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
+ *
+ *	* Rotates the display *
+ *	void (*fb_rotate)(struct fb_info *info, int angle);
+ *
+ *	* wait for blit idle, optional *
+ *	int (*fb_sync)(struct fb_info *info);
+ *
+ *	* perform fb specific ioctl (optional) *
+ *	int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
+ *			unsigned long arg);
+ *
+ *	* Handle 32bit compat ioctl (optional) *
+ *	int (*fb_compat_ioctl)(struct fb_info *info, unsigned int cmd,
+ *			unsigned long arg);
+ *
+ *	* perform fb specific mmap *
+ *	int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
+ *
+ *	* save current hardware state *
+ *	void (*fb_save_state)(struct fb_info *info);
+ *
+ *	* restore saved state *
+ *	void (*fb_restore_state)(struct fb_info *info);
+ * } ;
+ */
+
+
 /* ++roman: This structure abstracts from the underlying hardware (ST(e),
  * TT, or Falcon.
  *
- * int (*detect)( void )
+ * int (*detect)(void)
  *   This function should detect the current video mode settings and
  *   store them in atafb_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 atafb_par *par )
+ *
+ * int (*encode_fix)(struct fb_fix_screeninfo *fix,
+ *                   struct atafb_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 atafb_par *par )
+ * !!! Obsolete, perhaps !!!
+ *
+ * int (*decode_var)(struct fb_var_screeninfo *var,
+ *                   struct atafb_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, 
+ *   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 atafb_par *par );
+ * int (*encode_var)(struct fb_var_screeninfo *var,
+ *                   struct atafb_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 atafb_par *par )
+ *
+ * void (*get_par)(struct atafb_par *par)
  *   Fill the hardware's 'par' structure.
- *   
- * void (*set_par)( struct atafb_par *par )
+ *   !!! Used only by detect() !!!
+ *
+ * void (*set_par)(struct atafb_par *par)
  *   Set the hardware according to 'par'.
- *   
- * int (*getcolreg)( unsigned regno, unsigned *red,
- *                   unsigned *green, unsigned *blue,
- *                   unsigned *transp, struct fb_info *info )
- *   Read a single color register and split it into
- *   colors/transparent. Return != 0 for invalid regno.
  *
  * void (*set_screen_base)(void *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
+ * 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.
+ *       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 atafb_par *par );
-	int  (*decode_var)( struct fb_var_screeninfo *var,
-						struct atafb_par *par );
-	int  (*encode_var)( struct fb_var_screeninfo *var,
-						struct atafb_par *par );
-	void (*get_par)( struct atafb_par *par );
-	void (*set_par)( struct atafb_par *par );
-	int  (*getcolreg)( unsigned regno, unsigned *red,
-					   unsigned *green, unsigned *blue,
-					   unsigned *transp, struct fb_info *info );
+	int (*detect)(void);
+	int (*encode_fix)(struct fb_fix_screeninfo *fix,
+			  struct atafb_par *par);
+	int (*decode_var)(struct fb_var_screeninfo *var,
+			  struct atafb_par *par);
+	int (*encode_var)(struct fb_var_screeninfo *var,
+			  struct atafb_par *par);
+	void (*get_par)(struct atafb_par *par);
+	void (*set_par)(struct atafb_par *par);
 	void (*set_screen_base)(void *s_base);
-	int  (*blank)( int blank_mode );
-	int  (*pan_display)( struct fb_var_screeninfo *var,
-						 struct atafb_par *par);
+	int (*blank)(int blank_mode);
+	int (*pan_display)(struct fb_var_screeninfo *var,
+			   struct fb_info *info);
 } *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 *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 **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,
···
 	falh2_names,
 	falh16_names,
 	NULL
-	/* ,NULL */ /* this causes a sigsegv on my gcc-2.5.8 */
 };
 
 static struct fb_var_screeninfo atafb_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*/
+	/*
+	 * 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 */
+	{ /* 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 },
···
 	  0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0 },
 };
 
-static int num_atafb_predefined=ARRAY_SIZE(atafb_predefined);
+static int num_atafb_predefined = ARRAY_SIZE(atafb_predefined);
+
+static struct fb_videomode atafb_modedb[] __initdata = {
+	/*
+	 *  Atari Video Modes
+	 *
+	 *  If you change these, make sure to update DEFMODE_* as well!
+	 */
+
+	/*
+	 *  ST/TT Video Modes
+	 */
+
+	{
+		/* 320x200, 15 kHz, 60 Hz (ST low) */
+		"st-low", 60, 320, 200, 32000, 32, 16, 31, 14, 96, 4,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	}, {
+		/* 640x200, 15 kHz, 60 Hz (ST medium) */
+		"st-mid", 60, 640, 200, 32000, 32, 16, 31, 14, 96, 4,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	}, {
+		/* 640x400, 30.25 kHz, 63.5 Hz (ST high) */
+		"st-high", 63, 640, 400, 32000, 128, 0, 40, 14, 128, 4,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	}, {
+		/* 320x480, 15 kHz, 60 Hz (TT low) */
+		"tt-low", 60, 320, 480, 31041, 120, 100, 8, 16, 140, 30,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	}, {
+		/* 640x480, 29 kHz, 57 Hz (TT medium) */
+		"tt-mid", 60, 640, 480, 31041, 120, 100, 8, 16, 140, 30,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	}, {
+		/* 1280x960, 29 kHz, 60 Hz (TT high) */
+		"tt-high", 57, 640, 960, 31041, 120, 100, 8, 16, 140, 30,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	},
+
+	/*
+	 *  VGA Video Modes
+	 */
+
+	{
+		/* 640x480, 31 kHz, 60 Hz (VGA) */
+		"vga", 63.5, 640, 480, 32000, 18, 42, 31, 11, 96, 3,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	}, {
+		/* 640x400, 31 kHz, 70 Hz (VGA) */
+		"vga70", 70, 640, 400, 32000, 18, 42, 31, 11, 96, 3,
+		FB_SYNC_VERT_HIGH_ACT | FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	},
+
+	/*
+	 *  Falcon HiRes Video Modes
+	 */
+
+	{
+		/* 896x608, 31 kHz, 60 Hz (Falcon High) */
+		"falh", 60, 896, 608, 32000, 18, 42, 31, 1, 96,3,
+		0, FB_VMODE_NONINTERLACED | FB_VMODE_YWRAP
+	},
+};
+
+#define NUM_TOTAL_MODES  ARRAY_SIZE(atafb_modedb)
+
+static char *mode_option __initdata = NULL;
+
+ /* default modes */
+
+#define DEFMODE_TT	5		/* "tt-high" for TT */
+#define DEFMODE_F30	7		/* "vga70" for Falcon */
+#define DEFMODE_STE	2		/* "st-high" for ST/E */
+#define DEFMODE_EXT	6		/* "vga" for external */
 
 
-static int
-get_video_mode(char *vname)
+static int get_video_mode(char *vname)
 {
-    char ***name_list;
-    char **name;
-    int i;
-    name_list=fb_var_names;
-    for (i = 0 ; i < num_atafb_predefined ; i++) {
-	name=*(name_list++);
-	if (! name || ! *name)
-	    break;
-	while (*name) {
-	    if (! strcmp(vname, *name))
-		return i+1;
-	    name++;
+	char ***name_list;
+	char **name;
+	int i;
+
+	name_list = fb_var_names;
+	for (i = 0; i < num_atafb_predefined; i++) {
+		name = *name_list++;
+		if (!name || !*name)
+			break;
+		while (*name) {
+			if (!strcmp(vname, *name))
+				return i + 1;
+			name++;
+		}
 	}
-    }
-    return 0;
+	return 0;
 }
 
 
···
 
 #ifdef ATAFB_TT
 
-static int tt_encode_fix( struct fb_fix_screeninfo *fix,
-						  struct atafb_par *par )
-
+static int tt_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
 {
 	int mode;
 
-	strcpy(fix->id,"Atari Builtin");
+	strcpy(fix->id, "Atari Builtin");
 	fix->smem_start = (unsigned long)real_screen_base;
 	fix->smem_len = screen_len;
-	fix->type=FB_TYPE_INTERLEAVED_PLANES;
-	fix->type_aux=2;
-	fix->visual=FB_VISUAL_PSEUDOCOLOR;
+	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;
+		fix->type = FB_TYPE_PACKED_PIXELS;
+		fix->type_aux = 0;
 		if (mode == TT_SHIFTER_TTHIGH)
-			fix->visual=FB_VISUAL_MONO01;
+			fix->visual = FB_VISUAL_MONO01;
 	}
-	fix->xpanstep=0;
-	fix->ypanstep=1;
-	fix->ywrapstep=0;
+	fix->xpanstep = 0;
+	fix->ypanstep = 1;
+	fix->ywrapstep = 0;
 	fix->line_length = 0;
 	fix->accel = FB_ACCEL_ATARIBLITT;
 	return 0;
 }
 
-
-static int tt_decode_var( struct fb_var_screeninfo *var,
-						  struct atafb_par *par )
+static int tt_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
 {
-	int xres=var->xres;
-	int yres=var->yres;
-	int bpp=var->bits_per_pixel;
+	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)
+		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;
+		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)
+			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) {
+			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;
+			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 {
-				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)
+		} 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) {
+			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;
+		} else {
+			par->hw.tt.mode = TT_SHIFTER_STHIGH;
+			xres = sttt_xres;
+			yres = st_yres;
+			bpp = 1;
 		}
 	}
 	if (yres_virtual <= 0)
···
 	else if (yres_virtual < yres)
 		yres_virtual = yres;
 	if (var->sync & FB_SYNC_EXT)
-		par->hw.tt.sync=0;
+		par->hw.tt.sync = 0;
 	else
-		par->hw.tt.sync=1;
-	linelen=xres*bpp/8;
+		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 0;
 }
 
-static int tt_encode_var( struct fb_var_screeninfo *var,
-						  struct atafb_par *par )
+static int tt_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
 {
 	int linelen;
 	memset(var, 0, sizeof(struct fb_var_screeninfo));
-	var->red.offset=0;
-	var->red.length=4;
-	var->red.msb_right=0;
-	var->grayscale=0;
+	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->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;
+	var->height = -1;
+	var->width = -1;
 
 	if (par->hw.tt.sync & 1)
-		var->sync=0;
+		var->sync = 0;
 	else
-		var->sync=FB_SYNC_EXT;
+		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;
+		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;
+		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;
+		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;
+		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;
+		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;
+		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;
+	}
+	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 */
+			/* 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->yres_virtual = var->yres + hwscroll * 16;
 	}
-	var->xoffset=0;
+	var->xoffset = 0;
 	if (screen_base)
-		var->yoffset=(par->screen_base - screen_base)/linelen;
+		var->yoffset = (par->screen_base - screen_base) / linelen;
 	else
-		var->yoffset=0;
-	var->nonstd=0;
-	var->activate=0;
-	var->vmode=FB_VMODE_NONINTERLACED;
+		var->yoffset = 0;
+	var->nonstd = 0;
+	var->activate = 0;
+	var->vmode = FB_VMODE_NONINTERLACED;
 	return 0;
 }
 
-
-static void tt_get_par( struct atafb_par *par )
+static void tt_get_par(struct atafb_par *par)
 {
 	unsigned long addr;
-	par->hw.tt.mode=shifter_tt.tt_shiftmode;
-	par->hw.tt.sync=shifter.syncmode;
+	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 = phys_to_virt(addr);
 }
 
-static void tt_set_par( struct atafb_par *par )
+static void tt_set_par(struct atafb_par *par)
 {
-	shifter_tt.tt_shiftmode=par->hw.tt.mode;
-	shifter.syncmode=par->hw.tt.sync;
+	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, struct fb_info *info)
-{
-	int t, col;
-
-	if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
-		regno += 254;
-	if (regno > 255)
-		return 1;
-	t = tt_palette[regno];
-	col = t & 15;
-	col |= col << 4;
-	col |= col << 8;
-	*blue = col;
-	col = (t >> 4) & 15;
-	col |= col << 4;
-	col |= col << 8;
-	*green = col;
-	col = (t >> 8) & 15;
-	col |= col << 4;
-	col |= col << 8;
-	*red = col;
-	*transp = 0;
-	return 0;
-}
-
-
-static int tt_setcolreg(unsigned regno, unsigned red,
-			unsigned green, unsigned blue,
-			unsigned transp, struct fb_info *info)
+static int tt_setcolreg(unsigned int regno, unsigned int red,
+			unsigned int green, unsigned int blue,
+			unsigned int transp, struct fb_info *info)
 {
 	if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) == TT_SHIFTER_STHIGH)
 		regno += 254;
···
 	tt_palette[regno] = (((red >> 12) << 8) | ((green >> 12) << 4) |
 			     (blue >> 12));
 	if ((shifter_tt.tt_shiftmode & TT_SHIFTER_MODEMASK) ==
-		TT_SHIFTER_STHIGH && regno == 254)
+	    TT_SHIFTER_STHIGH && regno == 254)
 		tt_palette[0] = 0;
 	return 0;
 }
 
-						  
-static int tt_detect( void )
-
-{	struct atafb_par par;
+static int tt_detect(void)
+{
+	struct atafb_par par;
 
 	/* Determine the connected monitor: The DMA sound must be
 	 * disabled before reading the MFP GPIP, because the Sound
···
 	 * announced that the Eagle is TT compatible, but only the PCM is
 	 * missing...
 	 */
-	if (ATARIHW_PRESENT(PCM_8BIT)) { 
+	if (ATARIHW_PRESENT(PCM_8BIT)) {
 		tt_dmasnd.ctrl = DMASND_CTRL_OFF;
-		udelay(20);	/* wait a while for things to settle down */
+		udelay(20);		/* wait a while for things to settle down */
 	}
 	mono_moni = (mfp.par_dt_reg & 0x80) == 0;
 
···
 	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() */
+	/* 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};
+} 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}};
+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 long h_syncs[4] = { 3000000, 4875000, 4000000, 4875000 };
 
 #ifdef FBCON_HAS_CFB16
 static u16 fbcon_cfb16_cmap[16];
···
 
 static inline int hxx_prescale(struct falcon_hw *hw)
 {
-	return hw->ste_mode ? 16 :
-		   vdl_prescale[mon_type][hw->vid_mode >> 2 & 0x3];
+	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 atafb_par *par )
+static int falcon_encode_fix(struct fb_fix_screeninfo *fix,
+			     struct atafb_par *par)
 {
 	strcpy(fix->id, "Atari Builtin");
 	fix->smem_start = (unsigned long)real_screen_base;
···
 		fix->type_aux = 0;
 		/* no smooth scrolling with longword aligned video mem */
 		fix->xpanstep = 32;
-	}
-	else if (par->hw.falcon.f_shift & 0x100) {
+	} 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? */
···
 	return 0;
 }
 
-
-static int falcon_decode_var( struct fb_var_screeninfo *var,
-							  struct atafb_par *par )
+static int falcon_decode_var(struct fb_var_screeninfo *var,
+			     struct atafb_par *par)
 {
 	int bpp = var->bits_per_pixel;
 	int xres = var->xres;
···
 	int linelen;
 	int interlace = 0, doubleline = 0;
 	struct pixel_clock *pclock;
-	int plen; /* width of pixel in clock cycles */
+	int plen;			/* width of pixel in clock cycles */
 	int xstretch;
 	int prescale;
 	int longoffset = 0;
 	int hfreq, vfreq;
+	int hdb_off, hde_off, base_off;
+	int gstart, gend1, gend2, align;
 
 /*
 	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, 
+	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
···
 	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)
+	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. 
+	Currently interlace and doubleline mode in var are ignored.
 	On SM124 and TV only the standard resolutions can be used.
 */
 
···
 	if (!xres || !yres || !bpp)
 		return -EINVAL;
 
-	if (mon_type == F_MON_SM && bpp != 1) {
+	if (mon_type == F_MON_SM && bpp != 1)
 		return -EINVAL;
-	}
-	else if (bpp <= 1) {
+
+	if (bpp <= 1) {
 		bpp = 1;
 		par->hw.falcon.f_shift = 0x400;
 		par->hw.falcon.st_shift = 0x200;
-	}
-	else if (bpp <= 2) {
+	} else if (bpp <= 2) {
 		bpp = 2;
 		par->hw.falcon.f_shift = 0x000;
 		par->hw.falcon.st_shift = 0x100;
-	}
-	else if (bpp <= 4) {
+	} else if (bpp <= 4) {
 		bpp = 4;
 		par->hw.falcon.f_shift = 0x000;
 		par->hw.falcon.st_shift = 0x000;
-	}
-	else if (bpp <= 8) {
+	} 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
+	} 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 = &atafb_predefined[0];
-		
+
 		if (bpp > myvar->bits_per_pixel ||
-			var->xres > myvar->xres ||
-			var->yres > myvar->yres)
+		    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 */
···
 		yres = 400;
 
 	/* 2 planes must use STE compatibility mode */
-	par->hw.falcon.ste_mode = bpp==2;
-	par->hw.falcon.mono = bpp==1;
+	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
···
 		left_margin = hsync_len = 128 / plen;
 		right_margin = 0;
 		/* TODO set all margins */
-	}
-	else
+	} else
 #endif
 	if (mon_type == F_MON_SC || mon_type == F_MON_TV) {
 		plen = 2 * xstretch;
···
 				vsync_len *= 2;
 			}
 		}
-	}
-	else
-	{	/* F_MON_VGA */
+	} else {			/* F_MON_VGA */
 		if (bpp == 16)
-			xstretch = 2; /* Double pixel width only for hicolor */
+			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) *
+			if ((plen * xres + f25.right + f25.hsync + f25.left) *
 			    fb_info.monspecs.hfmin < f25.f)
 				pclock = &f25;
-			else if ((plen * xres + f32.right+f32.hsync+f32.left) * 
-			    fb_info.monspecs.hfmin < f32.f)
+			else if ((plen * xres + f32.right + f32.hsync +
+				  f32.left) * fb_info.monspecs.hfmin < f32.f)
 				pclock = &f32;
-			else if ((plen * xres + fext.right+fext.hsync+fext.left) * 
-			    fb_info.monspecs.hfmin < fext.f
-			         && fext.f)
+			else if ((plen * xres + fext.right + fext.hsync +
+				  fext.left) * fb_info.monspecs.hfmin < fext.f &&
+			         fext.f)
 				pclock = &fext;
 			else
 				return -EINVAL;
···
 			upper_margin = 31;
 			lower_margin = 11;
 			vsync_len = 3;
-		}
-		else {
+		} 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) {
+			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) {
+				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) {
+				if (fext.t && fext.t * i >= var->pixclock &&
+				    fext.t * i < pcl) {
 					pcl = fext.t * i;
 					pclock = &fext;
 				}
···
 				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) {
+			} else if (var->vmode & FB_VMODE_DOUBLE) {
 				/* External unit is [double lines per frame] */
 				upper_margin *= 2;
 				lower_margin *= 2;
···
 			}
 		}
 		if (pclock == &fext)
-			longoffset = 1; /* VIDEL doesn't synchronize on short offset */
+			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 */
···
 	 * between interlace and non-interlace without messing around
 	 * with these.
 	 */
-  again:
+again:
 	/* Set base_offset 128 and video bus width */
 	par->hw.falcon.vid_control = mon_type | f030_bus_width;
 	if (!longoffset)
···
 	/* External or internal clock */
 	par->hw.falcon.sync = pclock->sync_mask | 0x2;
 	/* Pixellength and prescale */
-	par->hw.falcon.vid_mode = (2/plen) << 2;
+	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
-	*********************/
+	 * 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;
 
···
 		align = 1;
 		hde_off = 0;
 		hdb_off = (base_off + 16 * plen) + prescale;
-	}
-	else {
+	} else {
 		align = 128 / bpp;
 		hde_off = ((128 / bpp + 2) * plen);
 		if (par->hw.falcon.ste_mode)
···
 			hdb_off = (base_off + (128 / bpp + 18) * plen) + prescale;
 	}
 
-	gstart = (prescale/2 + plen * left_margin) / 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;
+	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->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;
+	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 ((par->HDB & 0x200) && (par->HDB & ~0x200) - par->HDE <= 5) {
 		/* if this happens increase margins, decrease hfreq. */
 	}
 #endif
···
 	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 > fb_info.monspecs.hfmax && mon_type!=F_MON_VGA) {
+	hfreq = pclock->f / ((par->HHT + 2) * prescale * 2);
+	if (hfreq > fb_info.monspecs.hfmax && mon_type != F_MON_VGA) {
 		/* ++guenther:   ^^^^^^^^^^^^^^^^^^^ can't remember why I did this */
 		/* Too high -> enlarge margin */
 		left_margin += 1;
···
 	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 */
+	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);
+	par->VSS = par->VFT + 1 - (vsync_len * 2 - 1);
 	/* vbb,vss,vft must be even in interlace mode */
 	if (interlace) {
 		par->VBB++;
···
 	/* 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 > fb_info.monspecs.vfmax && !doubleline && !interlace) {
+	if (vfreq > fb_info.monspecs.vfmax && !doubleline && !interlace) {
 		/* Too high -> try again with doubleline */
 		doubleline = 1;
 		goto again;
-	}
-	else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
+	} else if (vfreq < fb_info.monspecs.vfmin && !interlace && !doubleline) {
 		/* Too low -> try again with interlace */
 		interlace = 1;
 		goto again;
-	}
-	else if (vfreq < fb_info.monspecs.vfmin && doubleline) {
+	} else if (vfreq < fb_info.monspecs.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)>fb_info.monspecs.vfmax;
+		for (lines = 0;
+		     (hfreq * 2) / (par->VFT + 1 + 4 * lines - 2 * yres) >
+		     fb_info.monspecs.vfmax;
 		     lines++)
 			;
 		upper_margin += lines;
 		lower_margin += lines;
 		goto again;
-	}
-	else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
+	} else if (vfreq > fb_info.monspecs.vfmax && doubleline) {
 		/* Doubleline too high -> enlarge margins */
 		int lines;
-		for (lines=0;
-		     (hfreq*2)/(par->VFT+1+4*lines)>fb_info.monspecs.vfmax;
-		     lines+=2)
+		for (lines = 0;
+		     (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
+		     fb_info.monspecs.vfmax;
+		     lines += 2)
 			;
 		upper_margin += lines;
 		lower_margin += lines;
 		goto again;
-	}
-	else if (vfreq > fb_info.monspecs.vfmax && interlace) {
+	} else if (vfreq > fb_info.monspecs.vfmax && interlace) {
 		/* Interlace, too high -> enlarge margins */
 		int lines;
-		for (lines=0;
-		     (hfreq*2)/(par->VFT+1+4*lines)>fb_info.monspecs.vfmax;
+		for (lines = 0;
+		     (hfreq * 2) / (par->VFT + 1 + 4 * lines) >
+		     fb_info.monspecs.vfmax;
 		     lines++)
 			;
 		upper_margin += lines;
 		lower_margin += lines;
 		goto again;
-	}
-	else if (vfreq < fb_info.monspecs.vfmin ||
-		 vfreq > fb_info.monspecs.vfmax)
+	} else if (vfreq < fb_info.monspecs.vfmin ||
+		   vfreq > fb_info.monspecs.vfmax)
 		return -EINVAL;
 
-  set_screen_base:
+set_screen_base:
 	linelen = xres_virtual * bpp / 8;
 	if (yres_virtual * linelen > screen_len && screen_len)
 		return -EINVAL;
···
 	par->screen_base = screen_base + var->yoffset * linelen;
 	par->hw.falcon.xoffset = 0;
 
+	// FIXME!!! sort of works, no crash
+	//par->next_line = linelen;
+	//par->next_plane = yres_virtual * linelen;
+	par->next_line = linelen;
+	par->next_plane = 2;
+	// crashes
+	//par->next_plane = linelen;
+	//par->next_line  = yres_virtual * linelen;
+
 	return 0;
 }
 
-static int falcon_encode_var( struct fb_var_screeninfo *var,
-							  struct atafb_par *par )
+static int falcon_encode_var(struct fb_var_screeninfo *var,
+			     struct atafb_par *par)
 {
 /* !!! only for VGA !!! */
 	int linelen;
···
 	var->pixclock = hw->sync & 0x1 ? fext.t :
 	                hw->vid_control & VCO_CLOCK25 ? f25.t : f32.t;
 
-	var->height=-1;
-	var->width=-1;
+	var->height = -1;
+	var->width = -1;
 
-	var->sync=0;
+	var->sync = 0;
 	if (hw->vid_control & VCO_HSYPOS)
 		var->sync |= FB_SYNC_HOR_HIGH_ACT;
 	if (hw->vid_control & VCO_VSYPOS)
···
 		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
···
 	if (var->vmode & FB_VMODE_DOUBLE)
 		var->yres >>= 1;
 
-	/* to get bpp, we must examine f_shift and st_shift.
+	/*
+	 * 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 */
+	if (hw->f_shift & 0x400)	/* 2 colors */
 		var->bits_per_pixel = 1;
 	else if (hw->f_shift & 0x100)	/* hicolor */
 		var->bits_per_pixel = 16;
···
 		var->bits_per_pixel = 4;
 	else if (hw->st_shift == 0x100)
 		var->bits_per_pixel = 2;
-	else /* if (hw->st_shift == 0x200) */
+	else				/* if (hw->st_shift == 0x200) */
 		var->bits_per_pixel = 1;
 
 	var->xres = hw->line_width * 16 / var->bits_per_pixel;
···
 		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.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;
+		if (var->red.length > var->bits_per_pixel)
+			var->red.length = var->bits_per_pixel;
+		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;
+	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 */
+			/* yres_virtual == 0 means use maximum */
 			var->yres_virtual = screen_len / linelen;
-	}
-	else {
+	} else {
 		if (hwscroll < 0)
 			var->yres_virtual = 2 * var->yres;
 		else
-			var->yres_virtual=var->yres+hwscroll * 16;
+			var->yres_virtual = var->yres + hwscroll * 16;
 	}
-	var->xoffset=0; /* TODO change this */
+	var->xoffset = 0;		/* TODO change this */
 
 	/* hdX-offsets */
 	prescale = hxx_prescale(hw);
···
 	if (hw->f_shift & 0x100) {
 		hde_off = 0;
 		hdb_off = (base_off + 16 * plen) + prescale;
-	}
-	else {
+	} 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)
···
 
 	/* 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)
+					   (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->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 */
+	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) {
+	} 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->lower_margin -= var->vsync_len;
 
 	if (screen_base)
-		var->yoffset=(par->screen_base - screen_base)/linelen;
+		var->yoffset = (par->screen_base - screen_base) / linelen;
 	else
-		var->yoffset=0;
-	var->nonstd=0;	/* what is this for? */
-	var->activate=0;
+		var->yoffset = 0;
+	var->nonstd = 0;		/* what is this for? */
+	var->activate = 0;
 	return 0;
 }
 
-
-static int f_change_mode = 0;
+static int f_change_mode;
 static struct falcon_hw f_new_mode;
-static int f_pan_display = 0;
+static int f_pan_display;
 
-static void falcon_get_par( struct atafb_par *par )
+static void falcon_get_par(struct atafb_par *par)
 {
 	unsigned long addr;
 	struct falcon_hw *hw = &par->hw.falcon;
···
 	par->screen_base = phys_to_virt(addr);
 
 	/* derived parameters */
-	hw->ste_mode = (hw->f_shift & 0x510)==0 && hw->st_shift==0x100;
+	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);
+	           ((hw->f_shift & 0x510) == 0 && hw->st_shift == 0x200);
 }
 
-static void falcon_set_par( struct atafb_par *par )
+static void falcon_set_par(struct atafb_par *par)
 {
 	f_change_mode = 0;
 
···
 	f_change_mode = 1;
 }
 
-
-static irqreturn_t falcon_vbl_switcher( int irq, void *dummy )
+static irqreturn_t falcon_vbl_switcher(int irq, void *dummy)
 {
 	struct falcon_hw *hw = &f_new_mode;
 
···
 
 		if (hw->sync & 0x1) {
 			/* Enable external pixelclock. This code only for ScreenWonder */
-			*(volatile unsigned short*)0xffff9202 = 0xffbf;
-		}
-		else {
+			*(volatile unsigned short *)0xffff9202 = 0xffbf;
+		} else {
 			/* Turn off external clocks. Read sets all output bits to 1. */
-			*(volatile unsigned short*)0xffff9202;
+			*(volatile unsigned short *)0xffff9202;
 		}
 		shifter.syncmode = hw->sync;
 
···
 		videl.vde = hw->vde;
 		videl.vss = hw->vss;
 
-		videl.f_shift = 0; /* write enables Falcon palette, 0: 4 planes */
+		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 {
+			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.
+			 * 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
+			 * doesn't set st_shift. st_shift != 0 (!= 4planes) is impossible
 			 * with Falcon palette.
 			 */
 			videl.st_shift = 0;
···
 	return IRQ_HANDLED;
 }
 
-
-static int falcon_pan_display( struct fb_var_screeninfo *var,
-							   struct atafb_par *par )
+static int falcon_pan_display(struct fb_var_screeninfo *var,
+			      struct fb_info *info)
 {
+	struct atafb_par *par = (struct atafb_par *)info->par;
+
 	int xoffset;
-	int bpp = fb_display[fb_info.currcon].var.bits_per_pixel;
+	int bpp = info->var.bits_per_pixel;
 
 	if (bpp == 1)
 		var->xoffset = up(var->xoffset, 32);
···
 		var->xoffset = up(var->xoffset, 2);
 	}
 	par->hw.falcon.line_offset = bpp *
-	       	(fb_display[fb_info.currcon].var.xres_virtual - fb_display[fb_info.currcon].var.xres) / 16;
+		(info->var.xres_virtual - info->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 * fb_display[fb_info.currcon].var.xres_virtual + xoffset) * bpp / 8;
+	        (var->yoffset * info->var.xres_virtual + xoffset) * bpp / 8;
 	if (fbhw->set_screen_base)
-		fbhw->set_screen_base (par->screen_base);
+		fbhw->set_screen_base(par->screen_base);
 	else
-		return -EINVAL; /* shouldn't happen */
+		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, struct fb_info *info )
-{	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 >> 16) & 0xff00;
-	*green = (col >> 8) & 0xff00;
-	*blue = (col << 8) & 0xff00;
-	*transp = 0;
-	return 0;
-}
-
-
-static int falcon_setcolreg( unsigned regno, unsigned red,
-							 unsigned green, unsigned blue,
-							 unsigned transp, struct fb_info *info )
+static int falcon_setcolreg(unsigned int regno, unsigned int red,
+			    unsigned int green, unsigned int blue,
+			    unsigned int transp, struct fb_info *info)
 {
 	if (regno > 255)
 		return 1;
···
 	return 0;
 }
 
-
-static int falcon_blank( int blank_mode )
+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()).
- */
+	/* ++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 0;
 }
 
- 
-static int falcon_detect( void )
+static int falcon_detect(void)
 {
 	struct atafb_par par;
 	unsigned char fhw;
 
 	/* Determine connected monitor and set monitor parameters */
-	fhw = *(unsigned char*)0xffff8006;
+	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;
···
 	case F_MON_SC:
 	case F_MON_TV:
 		/* PAL...NTSC */
-		fb_info.monspecs.vfmin = 49; /* not 50, since TOS defaults to 49.9x Hz */
+		fb_info.monspecs.vfmin = 49;	/* not 50, since TOS defaults to 49.9x Hz */
 		fb_info.monspecs.vfmax = 60;
 		fb_info.monspecs.hfmin = 15620;
 		fb_info.monspecs.hfmax = 15755;
···
 
 #ifdef ATAFB_STE
 
-static int stste_encode_fix( struct fb_fix_screeninfo *fix,
-							 struct atafb_par *par )
-
+static int stste_encode_fix(struct fb_fix_screeninfo *fix,
+			    struct atafb_par *par)
 {
 	int mode;
 
-	strcpy(fix->id,"Atari Builtin");
+	strcpy(fix->id, "Atari Builtin");
 	fix->smem_start = (unsigned long)real_screen_base;
 	fix->smem_len = screen_len;
 	fix->type = FB_TYPE_INTERLEAVED_PLANES;
···
 	return 0;
 }
 
-
-static int stste_decode_var( struct fb_var_screeninfo *var,
-						  struct atafb_par *par )
+static int stste_decode_var(struct fb_var_screeninfo *var,
+			    struct atafb_par *par)
 {
-	int xres=var->xres;
-	int yres=var->yres;
-	int bpp=var->bits_per_pixel;
+	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;
+		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)
+			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)
+			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
+			par->hw.st.mode = ST_MID;
+			xres = sttt_xres;
+			yres = st_yres / 2;
+			bpp = 2;
+		} else
 			return -EINVAL;
 	}
 	if (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;
+		par->hw.st.sync = (par->hw.st.sync & ~1) | 1;
 	else
-		par->hw.st.sync=(par->hw.st.sync & ~1);
-	linelen=xres*bpp/8;
+		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)
···
 	if (var->yoffset + yres > yres_virtual && yres_virtual)
 		return -EINVAL;
 	par->yres_virtual = yres_virtual;
-	par->screen_base=screen_base+ var->yoffset*linelen;
+	par->screen_base = screen_base + var->yoffset * linelen;
 	return 0;
 }
 
-static int stste_encode_var( struct fb_var_screeninfo *var,
-						  struct atafb_par *par )
+static int stste_encode_var(struct fb_var_screeninfo *var,
+			    struct atafb_par *par)
 {
 	int linelen;
 	memset(var, 0, sizeof(struct fb_var_screeninfo));
-	var->red.offset=0;
+	var->red.offset = 0;
 	var->red.length = ATARIHW_PRESENT(EXTD_SHIFTER) ? 4 : 3;
-	var->red.msb_right=0;
-	var->grayscale=0;
+	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->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;
+	var->height = -1;
+	var->width = -1;
 
 	if (!(par->hw.st.sync & 1))
-		var->sync=0;
+		var->sync = 0;
 	else
-		var->sync=FB_SYNC_EXT;
+		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;
+		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;
+		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;
+		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;
+	}
+	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 */
+			/* yres_virtual == 0 means use maximum */
 			var->yres_virtual = screen_len / linelen;
-	}
-	else {
+	} else {
 		if (hwscroll < 0)
 			var->yres_virtual = 2 * var->yres;
 		else
-			var->yres_virtual=var->yres+hwscroll * 16;
+			var->yres_virtual = var->yres + hwscroll * 16;
 	}
-	var->xoffset=0;
+	var->xoffset = 0;
 	if (screen_base)
-		var->yoffset=(par->screen_base - screen_base)/linelen;
+		var->yoffset = (par->screen_base - screen_base) / linelen;
 	else
-		var->yoffset=0;
-	var->nonstd=0;
-	var->activate=0;
-	var->vmode=FB_VMODE_NONINTERLACED;
+		var->yoffset = 0;
+	var->nonstd = 0;
+	var->activate = 0;
+	var->vmode = FB_VMODE_NONINTERLACED;
 	return 0;
 }
 
-
-static void stste_get_par( struct atafb_par *par )
+static void stste_get_par(struct atafb_par *par)
 {
 	unsigned long addr;
-	par->hw.st.mode=shifter_tt.st_shiftmode;
-	par->hw.st.sync=shifter.syncmode;
+	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))
···
 	par->screen_base = phys_to_virt(addr);
 }
 
-static void stste_set_par( struct atafb_par *par )
+static void stste_set_par(struct atafb_par *par)
 {
-	shifter_tt.st_shiftmode=par->hw.st.mode;
-	shifter.syncmode=par->hw.st.sync;
+	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, struct fb_info *info)
-{
-	unsigned col, t;
-	
-	if (regno > 15)
-		return 1;
-	col = shifter_tt.color_reg[regno];
-	if (ATARIHW_PRESENT(EXTD_SHIFTER)) {
-		t = ((col >> 7) & 0xe) | ((col >> 11) & 1);
-		t |= t << 4;
-		*red = t | (t << 8);
-		t = ((col >> 3) & 0xe) | ((col >> 7) & 1);
-		t |= t << 4;
-		*green = t | (t << 8);
-		t = ((col << 1) & 0xe) | ((col >> 3) & 1);
-		t |= t << 4;
-		*blue = t | (t << 8);
-	}
-	else {
-		t = (col >> 7) & 0xe;
-		t |= t << 4;
-		*red = t | (t << 8);
-		t = (col >> 3) & 0xe;
-		t |= t << 4;
-		*green = t | (t << 8);
-		t = (col << 1) & 0xe;
-		t |= t << 4;
-		*blue = t | (t << 8);
-	}
-	*transp = 0;
-	return 0;
-}
-
-
-static int stste_setcolreg(unsigned regno, unsigned red,
-			   unsigned green, unsigned blue,
-			   unsigned transp, struct fb_info *info)
+static int stste_setcolreg(unsigned int regno, unsigned int red,
+			   unsigned int green, unsigned int blue,
+			   unsigned int transp, struct fb_info *info)
 {
 	if (regno > 15)
 		return 1;
···
 	return 0;
 }
 
-						  
-static int stste_detect( void )
-
-{	struct atafb_par par;
+static int stste_detect(void)
+{
+	struct atafb_par par;
 
 	/* Determine the connected monitor: The DMA sound must be
 	 * disabled before reading the MFP GPIP, because the Sound
···
 	 */
 	if (ATARIHW_PRESENT(PCM_8BIT)) {
 		tt_dmasnd.ctrl = DMASND_CTRL_OFF;
-		udelay(20);	/* wait a while for things to settle down */
+		udelay(20);		/* wait a while for things to settle down */
 	}
 	mono_moni = (mfp.par_dt_reg & 0x80) == 0;
 
···
 static void stste_set_screen_base(void *s_base)
 {
 	unsigned long addr;
-	addr= virt_to_phys(s_base);
+	addr = virt_to_phys(s_base);
 	/* Setup Screen Memory */
-	shifter.bas_hi=(unsigned char) ((addr & 0xff0000) >> 16);
-  	shifter.bas_md=(unsigned char) ((addr & 0x00ff00) >> 8);
+	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);
+		shifter.bas_lo = (unsigned char)(addr & 0x0000ff);
 }
 
 #endif /* ATAFB_STE */
···
 /* SWITCH_ACIA may be used for Falcon (ScreenBlaster III internal!) */
 static void st_ovsc_switch(void)
 {
-    unsigned long flags;
-    register unsigned char old, new;
+	unsigned long flags;
+	register unsigned char old, new;
 
-    if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
-	return;
-    local_irq_save(flags);
+	if (!(atari_switches & ATARI_SWITCH_OVSC_MASK))
+		return;
+	local_irq_save(flags);
 
-    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;
+	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;
-    } while (old != new);
-    mfp.tim_ct_b = 0x10;
-    udelay(SYNC_DELAY);
+	do {
+		udelay(LINE_DELAY);
+		old = new;
+		new = mfp.tim_dt_b;
+	} while (old != new);
+	mfp.tim_ct_b = 0x10;
+	udelay(SYNC_DELAY);
 
-    if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
-	acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
-    if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
-	acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
-    if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
-	sound_ym.rd_data_reg_sel = 14;
-	sound_ym.wd_data = sound_ym.rd_data_reg_sel |
-			   ((atari_switches&ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
-			   ((atari_switches&ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
-    }
-    local_irq_restore(flags);
+	if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
+		acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID | ACIA_RIE;
+	if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
+		acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
+	if (atari_switches & (ATARI_SWITCH_OVSC_SND6|ATARI_SWITCH_OVSC_SND7)) {
+		sound_ym.rd_data_reg_sel = 14;
+		sound_ym.wd_data = sound_ym.rd_data_reg_sel |
+				   ((atari_switches & ATARI_SWITCH_OVSC_SND6) ? 0x40:0) |
+				   ((atari_switches & ATARI_SWITCH_OVSC_SND7) ? 0x80:0);
+	}
+	local_irq_restore(flags);
 }
 
 /* ------------------- External Video ---------------------- */
 
 #ifdef ATAFB_EXT
 
-static int ext_encode_fix( struct fb_fix_screeninfo *fix,
-						   struct atafb_par *par )
-
+static int ext_encode_fix(struct fb_fix_screeninfo *fix, struct atafb_par *par)
 {
-	strcpy(fix->id,"Unknown Extern");
+	strcpy(fix->id, "Unknown Extern");
 	fix->smem_start = (unsigned long)external_addr;
 	fix->smem_len = PAGE_ALIGN(external_len);
 	if (external_depth == 1) {
···
 		fix->visual =
 			(external_pmode == FB_TYPE_INTERLEAVED_PLANES ||
 			 external_pmode == FB_TYPE_PACKED_PIXELS) ?
-				FB_VISUAL_MONO10 :
-					FB_VISUAL_MONO01;
-	}
-	else {
+				FB_VISUAL_MONO10 : FB_VISUAL_MONO01;
+	} else {
 		/* Use STATIC if we don't know how to access color registers */
 		int visual = external_vgaiobase ?
 					 FB_VISUAL_PSEUDOCOLOR :
 					 FB_VISUAL_STATIC_PSEUDOCOLOR;
 		switch (external_pmode) {
-		    case -1:              /* truecolor */
-			fix->type=FB_TYPE_PACKED_PIXELS;
-			fix->visual=FB_VISUAL_TRUECOLOR;
+		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=visual;
+		case FB_TYPE_PACKED_PIXELS:
+			fix->type = FB_TYPE_PACKED_PIXELS;
+			fix->visual = visual;
 			break;
-		    case FB_TYPE_PLANES:
-			fix->type=FB_TYPE_PLANES;
-			fix->visual=visual;
+		case FB_TYPE_PLANES:
+			fix->type = FB_TYPE_PLANES;
+			fix->visual = visual;
 			break;
-		    case FB_TYPE_INTERLEAVED_PLANES:
-			fix->type=FB_TYPE_INTERLEAVED_PLANES;
-			fix->type_aux=2;
-			fix->visual=visual;
+		case FB_TYPE_INTERLEAVED_PLANES:
+			fix->type = FB_TYPE_INTERLEAVED_PLANES;
+			fix->type_aux = 2;
+			fix->visual = visual;
 			break;
 		}
 	}
···
 	return 0;
 }
 
-
-static int ext_decode_var( struct fb_var_screeninfo *var,
-						   struct atafb_par *par )
+static int ext_decode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
 {
 	struct fb_var_screeninfo *myvar = &atafb_predefined[0];
-	
+
 	if (var->bits_per_pixel > myvar->bits_per_pixel ||
-		var->xres > myvar->xres ||
-		var->xres_virtual > myvar->xres_virtual ||
-		var->yres > myvar->yres ||
-		var->xoffset > 0 ||
-		var->yoffset > 0)
+	    var->xres > myvar->xres ||
+	    var->xres_virtual > myvar->xres_virtual ||
+	    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 atafb_par *par )
+static int ext_encode_var(struct fb_var_screeninfo *var, struct atafb_par *par)
 {
 	memset(var, 0, sizeof(struct fb_var_screeninfo));
-	var->red.offset=0;
-	var->red.length=(external_pmode == -1) ? external_depth/3 : 
+	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->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->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->height = -1;
+	var->width = -1;
 
-	var->sync=0;
+	var->sync = 0;
 
 	var->xres = external_xres;
 	var->yres = external_yres;
 	var->xres_virtual = external_xres_virtual;
 	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->yres_virtual=var->yres;
-	var->xoffset=0;
-	var->yoffset=0;
-	var->nonstd=0;
-	var->activate=0;
-	var->vmode=FB_VMODE_NONINTERLACED;
+
+	var->blue = var->green = var->red;
+	var->transp.offset = 0;
+	var->transp.length = 0;
+	var->transp.msb_right = 0;
+	var->yres_virtual = var->yres;
+	var->xoffset = 0;
+	var->yoffset = 0;
+	var->nonstd = 0;
+	var->activate = 0;
+	var->vmode = FB_VMODE_NONINTERLACED;
 	return 0;
 }
 
-
-static void ext_get_par( struct atafb_par *par )
+static void ext_get_par(struct atafb_par *par)
 {
 	par->screen_base = external_addr;
 }
 
-static void ext_set_par( struct atafb_par *par )
+static void ext_set_par(struct atafb_par *par)
 {
 }
 
 #define OUTB(port,val) \
-	*((unsigned volatile char *) ((port)+external_vgaiobase))=(val)
+	*((unsigned volatile char *) ((port)+external_vgaiobase)) = (val)
 #define INB(port) \
 	(*((unsigned volatile char *) ((port)+external_vgaiobase)))
-#define DACDelay 				\
+#define DACDelay				\
 	do {					\
-		unsigned char tmp=INB(0x3da);	\
-		tmp=INB(0x3da);			\
+		unsigned char tmp = INB(0x3da);	\
+		tmp = INB(0x3da);			\
 	} while (0)
 
-static int ext_getcolreg( unsigned regno, unsigned *red,
-						  unsigned *green, unsigned *blue,
-						  unsigned *transp, struct fb_info *info )
+static int ext_setcolreg(unsigned int regno, unsigned int red,
+			 unsigned int green, unsigned int blue,
+			 unsigned int transp, struct fb_info *info)
 {
-	if (! external_vgaiobase)
+	unsigned char colmask = (1 << external_bitspercol) - 1;
+
+	if (!external_vgaiobase)
 		return 1;
-
-	    *red   = ext_color[regno].red;
-	    *green = ext_color[regno].green;
-	    *blue  = ext_color[regno].blue;
-	    *transp=0;
-	    return 0;
-}
-	
-static int ext_setcolreg( unsigned regno, unsigned red,
-						  unsigned green, unsigned blue,
-						  unsigned transp, struct fb_info *info )
-
-{	unsigned char colmask = (1 << external_bitspercol) - 1;
-
-	if (! external_vgaiobase)
-		return 1;
-
-	ext_color[regno].red = red;
-	ext_color[regno].green = green;
-	ext_color[regno].blue = blue;
 
 	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_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:
-	    OUTB((MV300_reg[regno] << 2)+1, red);
-	    OUTB((MV300_reg[regno] << 2)+1, green);
-	    OUTB((MV300_reg[regno] << 2)+1, blue);
-	    return 0;
+	case IS_MV300:
+		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;
-	  }
+	default:
+		return 1;
+	}
 }
-	
 
-static int ext_detect( void )
-
+static int ext_detect(void)
 {
 	struct fb_var_screeninfo *myvar = &atafb_predefined[0];
 	struct atafb_par dummy_par;
···
 static void set_screen_base(void *s_base)
 {
 	unsigned long addr;
-	addr= virt_to_phys(s_base);
+
+	addr = virt_to_phys(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);
+	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 atafb_par *par )
+static int pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 {
+	struct atafb_par *par = (struct atafb_par *)info->par;
+
 	if (!fbhw->set_screen_base ||
-		(!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
+	    (!ATARIHW_PRESENT(EXTD_SHIFTER) && var->xoffset))
 		return -EINVAL;
 	var->xoffset = up(var->xoffset, 16);
 	par->screen_base = screen_base +
-	        (var->yoffset * fb_display[fb_info.currcon].var.xres_virtual + var->xoffset)
-	        * fb_display[fb_info.currcon].var.bits_per_pixel / 8;
-	fbhw->set_screen_base (par->screen_base);
+	        (var->yoffset * info->var.xres_virtual + var->xoffset)
+	        * info->var.bits_per_pixel / 8;
+	fbhw->set_screen_base(par->screen_base);
 	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, 
-	set_screen_base, NULL, pan_display
+	.detect		= tt_detect,
+	.encode_fix	= tt_encode_fix,
+	.decode_var	= tt_decode_var,
+	.encode_var	= tt_encode_var,
+	.get_par	= tt_get_par,
+	.set_par	= tt_set_par,
+	.set_screen_base = set_screen_base,
+	.pan_display	= 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,
-	set_screen_base, falcon_blank, falcon_pan_display
+	.detect		= falcon_detect,
+	.encode_fix	= falcon_encode_fix,
+	.decode_var	= falcon_decode_var,
+	.encode_var	= falcon_encode_var,
+	.get_par	= falcon_get_par,
+	.set_par	= falcon_set_par,
+	.set_screen_base = set_screen_base,
+	.blank		= falcon_blank,
+	.pan_display	= 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_set_screen_base, NULL, pan_display
+	.detect		= stste_detect,
+	.encode_fix	= stste_encode_fix,
+	.decode_var	= stste_decode_var,
+	.encode_var	= stste_encode_var,
+	.get_par	= stste_get_par,
+	.set_par	= stste_set_par,
+	.set_screen_base = stste_set_screen_base,
+	.pan_display	= 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, NULL, NULL, NULL
+	.detect		= ext_detect,
+	.encode_fix	= ext_encode_fix,
+	.decode_var	= ext_decode_var,
+	.encode_var	= ext_encode_var,
+	.get_par	= ext_get_par,
+	.set_par	= ext_set_par,
 };
 #endif
 
-
-
-static void atafb_get_par( struct atafb_par *par )
+static void ata_get_par(struct atafb_par *par)
 {
-	if (current_par_valid) {
-		*par=current_par;
-	}
+	if (current_par_valid)
+		*par = current_par;
 	else
 		fbhw->get_par(par);
 }
 
-
-static void atafb_set_par( struct atafb_par *par )
+static void ata_set_par(struct atafb_par *par)
 {
 	fbhw->set_par(par);
-	current_par=*par;
-	current_par_valid=1;
+	current_par = *par;
+	current_par_valid = 1;
 }
-
 
 
 /* =========================================================== */
 /* ============== Hardware Independent Functions ============= */
 /* =========================================================== */
 
-
 /* used for hardware scrolling */
 
-static int
-fb_update_var(int con, struct fb_info *info)
+static int do_fb_set_var(struct fb_var_screeninfo *var, int isactive)
 {
-	int off=fb_display[con].var.yoffset*fb_display[con].var.xres_virtual*
-			fb_display[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;
+	int err, activate;
 	struct atafb_par par;
-	if ((err=fbhw->decode_var(var, &par)))
+
+	err = fbhw->decode_var(var, &par);
+	if (err)
 		return err;
-	activate=var->activate;
+	activate = var->activate;
 	if (((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) && isactive)
-		atafb_set_par(&par);
+		ata_set_par(&par);
 	fbhw->encode_var(var, &par);
-	var->activate=activate;
+	var->activate = activate;
 	return 0;
 }
 
-static int
-atafb_get_fix(struct fb_fix_screeninfo *fix, int con, struct fb_info *info)
+static int atafb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
 {
 	struct atafb_par par;
-	if (con == -1)
-		atafb_get_par(&par);
-	else {
-	  int err;
-		if ((err=fbhw->decode_var(&fb_display[con].var,&par)))
-		  return err;
-	}
+	int err;
+	// Get fix directly (case con == -1 before)??
+	err = fbhw->decode_var(&info->var, &par);
+	if (err)
+		return err;
 	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
 	return fbhw->encode_fix(fix, &par);
 }
-	
-static int
-atafb_get_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
+
+static int atafb_get_var(struct fb_var_screeninfo *var, struct fb_info *info)
 {
 	struct atafb_par par;
-	if (con == -1) {
-		atafb_get_par(&par);
-		fbhw->encode_var(var, &par);
-	}
-	else
-		*var=fb_display[con].var;
+
+	ata_get_par(&par);
+	fbhw->encode_var(var, &par);
+
 	return 0;
 }
 
-static void
-atafb_set_disp(int con, struct fb_info *info)
+// No longer called by fbcon!
+// Still called by set_var internally
+
+static void atafb_set_disp(struct fb_info *info)
 {
-	struct fb_fix_screeninfo fix;
-	struct fb_var_screeninfo var;
-	struct display *display;
+	atafb_get_var(&info->var, info);
+	atafb_get_fix(&info->fix, info);
 
-	if (con >= 0)
-		display = &fb_display[con];
-	else
-		display = &disp;	/* used during initialization */
+	info->screen_base = (void *)info->fix.smem_start;
 
-	atafb_get_fix(&fix, con, info);
-	atafb_get_var(&var, con, info);
-	if (con == -1)
-		con=0;
-	info->screen_base = (void *)fix.smem_start;
-	display->visual = fix.visual;
-	display->type = fix.type;
-	display->type_aux = fix.type_aux;
-	display->ypanstep = fix.ypanstep;
-	display->ywrapstep = fix.ywrapstep;
-	display->line_length = fix.line_length;
-	if (fix.visual != FB_VISUAL_PSEUDOCOLOR &&
-		fix.visual != FB_VISUAL_DIRECTCOLOR)
-		display->can_soft_blank = 0;
-	else
-		display->can_soft_blank = 1;
-	display->inverse =
-	    (fix.visual == FB_VISUAL_MONO01 ? !inverse : inverse);
-	switch (fix.type) {
-	    case FB_TYPE_INTERLEAVED_PLANES:
-		switch (var.bits_per_pixel) {
-#ifdef FBCON_HAS_IPLAN2P2
-		    case 2:
-			display->dispsw = &fbcon_iplan2p2;
+	switch (info->fix.type) {
+	case FB_TYPE_INTERLEAVED_PLANES:
+		switch (info->var.bits_per_pixel) {
+		case 2:
+			// display->dispsw = &fbcon_iplan2p2;
 			break;
-#endif
-#ifdef FBCON_HAS_IPLAN2P4
-		    case 4:
-			display->dispsw = &fbcon_iplan2p4;
+		case 4:
+			// display->dispsw = &fbcon_iplan2p4;
 			break;
-#endif
-#ifdef FBCON_HAS_IPLAN2P8
-		    case 8:
-			display->dispsw = &fbcon_iplan2p8;
+		case 8:
+			// display->dispsw = &fbcon_iplan2p8;
 			break;
-#endif
 		}
 		break;
-	    case FB_TYPE_PACKED_PIXELS:
-		switch (var.bits_per_pixel) {
+	case FB_TYPE_PACKED_PIXELS:
+		switch (info->var.bits_per_pixel) {
 #ifdef FBCON_HAS_MFB
-		    case 1:
-			display->dispsw = &fbcon_mfb;
+		case 1:
+			// display->dispsw = &fbcon_mfb;
 			break;
 #endif
 #ifdef FBCON_HAS_CFB8
-		    case 8:
-			display->dispsw = &fbcon_cfb8;
+		case 8:
+			// display->dispsw = &fbcon_cfb8;
 			break;
 #endif
 #ifdef FBCON_HAS_CFB16
-		    case 16:
-			display->dispsw = &fbcon_cfb16;
-			display->dispsw_data = fbcon_cfb16_cmap;
+		case 16:
+			// display->dispsw = &fbcon_cfb16;
+			// display->dispsw_data = fbcon_cfb16_cmap;
 			break;
 #endif
 		}
···
 	}
 }
 
-static int
-atafb_set_var(struct fb_var_screeninfo *var, int con, struct fb_info *info)
+static int atafb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+			   u_int transp, struct fb_info *info)
 {
-	int err,oldxres,oldyres,oldbpp,oldxres_virtual,
-	    oldyres_virtual,oldyoffset;
-	if ((err=do_fb_set_var(var, con==info->currcon)))
-		return err;
-	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
-		oldxres=fb_display[con].var.xres;
-		oldyres=fb_display[con].var.yres;
-		oldxres_virtual=fb_display[con].var.xres_virtual;
-		oldyres_virtual=fb_display[con].var.yres_virtual;
-		oldbpp=fb_display[con].var.bits_per_pixel;
-		oldyoffset=fb_display[con].var.yoffset;
-		fb_display[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) {
-			atafb_set_disp(con, info);
-			(*fb_info.changevar)(con);
-			fb_alloc_cmap(&fb_display[con].cmap, 0, 0);
-			do_install_cmap(con, info);
-		}
-	}
-	var->activate=0;
-	return 0;
-}
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
 
-
-
-static int
-atafb_get_cmap(struct fb_cmap *cmap, int kspc, int con, struct fb_info *info)
-{
-	if (con == info->currcon) /* current console ? */
-		return fb_get_cmap(cmap, kspc, fbhw->getcolreg, info);
-	else
-		if (fb_display[con].cmap.len) /* non default colormap ? */
-			fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
-		else
-			fb_copy_cmap(fb_default_cmap(1<<fb_display[con].var.bits_per_pixel),
-				     cmap, kspc ? 0 : 2);
-	return 0;
+	return info->fbops->fb_setcolreg(regno, red, green, blue, transp, info);
 }
 
 static int
-atafb_pan_display(struct fb_var_screeninfo *var, int con, struct fb_info *info)
+atafb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
 {
 	int xoffset = var->xoffset;
 	int yoffset = var->yoffset;
 	int err;
 
-	if (   xoffset < 0 || xoffset + fb_display[con].var.xres > fb_display[con].var.xres_virtual
-	    || yoffset < 0 || yoffset + fb_display[con].var.yres > fb_display[con].var.yres_virtual)
-		return -EINVAL;
-
-	if (con == info->currcon) {
-		if (fbhw->pan_display) {
-			if ((err = fbhw->pan_display(var, &current_par)))
-				return err;
-		}
-		else
+	if (var->vmode & FB_VMODE_YWRAP) {
+		if (yoffset < 0 || yoffset >= info->var.yres_virtual || xoffset)
+			return -EINVAL;
+	} else {
+		if (xoffset + info->var.xres > info->var.xres_virtual ||
+		    yoffset + info->var.yres > info->var.yres_virtual)
 			return -EINVAL;
 	}
-	fb_display[con].var.xoffset = var->xoffset;
-	fb_display[con].var.yoffset = var->yoffset;
+
+	if (fbhw->pan_display) {
+		err = fbhw->pan_display(var, info);
+		if (err)
+			return err;
+	} else
+		return -EINVAL;
+
+	info->var.xoffset = xoffset;
+	info->var.yoffset = yoffset;
+
+	if (var->vmode & FB_VMODE_YWRAP)
+		info->var.vmode |= FB_VMODE_YWRAP;
+	else
+		info->var.vmode &= ~FB_VMODE_YWRAP;
+
 	return 0;
+}
+
+/*
+ * generic drawing routines; imageblit needs updating for image depth > 1
+ */
+
+#if BITS_PER_LONG == 32
+#define BYTES_PER_LONG	4
+#define SHIFT_PER_LONG	5
+#elif BITS_PER_LONG == 64
+#define BYTES_PER_LONG	8
+#define SHIFT_PER_LONG	6
+#else
+#define Please update me
+#endif
+
+
+static void atafb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct atafb_par *par = (struct atafb_par *)info->par;
+	int x2, y2;
+	u32 width, height;
+
+	if (!rect->width || !rect->height)
+		return;
+
+	/*
+	 * We could use hardware clipping but on many cards you get around
+	 * hardware clipping by writing to framebuffer directly.
+	 * */
+	x2 = rect->dx + rect->width;
+	y2 = rect->dy + rect->height;
+	x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
+	y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
+	width = x2 - rect->dx;
+	height = y2 - rect->dy;
+
+	if (info->var.bits_per_pixel == 1)
+		atafb_mfb_fillrect(info, par->next_line, rect->color,
+				   rect->dy, rect->dx, height, width);
+	else if (info->var.bits_per_pixel == 2)
+		atafb_iplan2p2_fillrect(info, par->next_line, rect->color,
+					rect->dy, rect->dx, height, width);
+	else if (info->var.bits_per_pixel == 4)
+		atafb_iplan2p4_fillrect(info, par->next_line, rect->color,
+					rect->dy, rect->dx, height, width);
+	else
+		atafb_iplan2p8_fillrect(info, par->next_line, rect->color,
+					rect->dy, rect->dx, height, width);
+
+	return;
+}
+
+static void atafb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+	struct atafb_par *par = (struct atafb_par *)info->par;
+	int x2, y2;
+	u32 dx, dy, sx, sy, width, height;
+	int rev_copy = 0;
+
+	/* clip the destination */
+	x2 = area->dx + area->width;
+	y2 = area->dy + area->height;
+	dx = area->dx > 0 ? area->dx : 0;
+	dy = area->dy > 0 ? area->dy : 0;
+	x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
+	y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
+	width = x2 - dx;
+	height = y2 - dy;
+
+	/* update sx,sy */
+	sx = area->sx + (dx - area->dx);
+	sy = area->sy + (dy - area->dy);
+
+	/* the source must be completely inside the virtual screen */
+	if (sx < 0 || sy < 0 || (sx + width) > info->var.xres_virtual ||
+	    (sy + height) > info->var.yres_virtual)
+		return;
+
+	if (dy > sy || (dy == sy && dx > sx)) {
+		dy += height;
+		sy += height;
+		rev_copy = 1;
+	}
+
+	if (info->var.bits_per_pixel == 1)
+		atafb_mfb_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+	else if (info->var.bits_per_pixel == 2)
+		atafb_iplan2p2_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+	else if (info->var.bits_per_pixel == 4)
+		atafb_iplan2p4_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+	else
+		atafb_iplan2p8_copyarea(info, par->next_line, sy, sx, dy, dx, height, width);
+
+	return;
+}
+
+static void atafb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct atafb_par *par = (struct atafb_par *)info->par;
+	int x2, y2;
+	unsigned long *dst;
+	int dst_idx;
+	const char *src;
+	u32 dx, dy, width, height, pitch;
+
+	/*
+	 * We could use hardware clipping but on many cards you get around
+	 * hardware clipping by writing to framebuffer directly like we are
+	 * doing here.
+	 */
+	x2 = image->dx + image->width;
+	y2 = image->dy + image->height;
+	dx = image->dx;
+	dy = image->dy;
+	x2 = x2 < info->var.xres_virtual ? x2 : info->var.xres_virtual;
+	y2 = y2 < info->var.yres_virtual ? y2 : info->var.yres_virtual;
+	width = x2 - dx;
+	height = y2 - dy;
+
+	if (image->depth == 1) {
+		// used for font data
+		dst = (unsigned long *)
+			((unsigned long)info->screen_base & ~(BYTES_PER_LONG - 1));
+		dst_idx = ((unsigned long)info->screen_base & (BYTES_PER_LONG - 1)) * 8;
+		dst_idx += dy * par->next_line * 8 + dx;
+		src = image->data;
+		pitch = (image->width + 7) / 8;
+		while (height--) {
+
+			if (info->var.bits_per_pixel == 1)
+				atafb_mfb_linefill(info, par->next_line,
+						   dy, dx, width, src,
+						   image->bg_color, image->fg_color);
+			else if (info->var.bits_per_pixel == 2)
+				atafb_iplan2p2_linefill(info, par->next_line,
+							dy, dx, width, src,
+							image->bg_color, image->fg_color);
+			else if (info->var.bits_per_pixel == 4)
+				atafb_iplan2p4_linefill(info, par->next_line,
+							dy, dx, width, src,
+							image->bg_color, image->fg_color);
+			else
+				atafb_iplan2p8_linefill(info, par->next_line,
+							dy, dx, width, src,
+							image->bg_color, image->fg_color);
+			dy++;
+			src += pitch;
+		}
+	} else {
+		// only used for logo; broken
+		c2p(info->screen_base, image->data, dx, dy, width, height,
+		    par->next_line, par->next_plane, image->width,
+		    info->var.bits_per_pixel);
+	}
 }
 
 static int
···
 		if (copy_from_user((void *)&current_par, (void *)arg,
 				   sizeof(struct atafb_par)))
 			return -EFAULT;
-		atafb_set_par(&current_par);
+		ata_set_par(&current_par);
 		return 0;
 #endif
 	}
···
  * 3 = suspend hsync
  * 4 = off
  */
-static int 
-atafb_blank(int blank, struct fb_info *info)
+static int atafb_blank(int blank, struct fb_info *info)
 {
 	unsigned short black[16];
 	struct fb_cmap cmap;
 	if (fbhw->blank && !fbhw->blank(blank))
 		return 1;
 	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;
-		fb_set_cmap(&cmap, 1, info);
+		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;
+		fb_set_cmap(&cmap, info);
 	}
+#if 0
 	else
-		do_install_cmap(info->currcon, info);
+		do_install_cmap(info);
+#endif
 	return 0;
 }
 
+	/*
+	 * New fbcon interface ...
+	 */
+
+	 /* check var by decoding var into hw par, rounding if necessary,
+	  * then encoding hw par back into new, validated var */
+static int atafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	int err;
+	struct atafb_par par;
+
+	/* Validate wanted screen parameters */
+	// if ((err = ata_decode_var(var, &par)))
+	err = fbhw->decode_var(var, &par);
+	if (err)
+		return err;
+
+	/* Encode (possibly rounded) screen parameters */
+	fbhw->encode_var(var, &par);
+	return 0;
+}
+
+	/* actually set hw par by decoding var, then setting hardware from
+	 * hw par just decoded */
+static int atafb_set_par(struct fb_info *info)
+{
+	struct atafb_par *par = (struct atafb_par *)info->par;
+
+	/* Decode wanted screen parameters */
+	fbhw->decode_var(&info->var, par);
+	fbhw->encode_fix(&info->fix, par);
+
+	/* Set new videomode */
+	ata_set_par(par);
+
+	return 0;
+}
+
+
 static struct fb_ops atafb_ops = {
 	.owner =	THIS_MODULE,
-	.fb_get_fix =	atafb_get_fix,
-	.fb_get_var =	atafb_get_var,
-	.fb_set_var =	atafb_set_var,
-	.fb_get_cmap =	atafb_get_cmap,
-	.fb_set_cmap =	gen_set_cmap,
-	.fb_pan_display =atafb_pan_display,
+	.fb_check_var	= atafb_check_var,
+	.fb_set_par	= atafb_set_par,
+	.fb_setcolreg	= atafb_setcolreg,
 	.fb_blank =	atafb_blank,
+	.fb_pan_display	= atafb_pan_display,
+	.fb_fillrect	= atafb_fillrect,
+	.fb_copyarea	= atafb_copyarea,
+	.fb_imageblit	= atafb_imageblit,
 	.fb_ioctl =	atafb_ioctl,
 };
 
-static void
-check_default_par( int detected_mode )
+static void check_default_par(int detected_mode)
 {
 	char default_name[10];
 	int i;
···
 
 	/* First try the user supplied mode */
 	if (default_par) {
-		var=atafb_predefined[default_par-1];
+		var = atafb_predefined[default_par - 1];
 		var.activate = FB_ACTIVATE_TEST;
-		if (do_fb_set_var(&var,1))
-			default_par=0;		/* failed */
+		if (do_fb_set_var(&var, 1))
+			default_par = 0;	/* failed */
 	}
 	/* Next is the autodetected one */
-	if (! default_par) {
-		var=atafb_predefined[detected_mode-1]; /* autodetect */
+	if (!default_par) {
+		var = atafb_predefined[detected_mode - 1]; /* autodetect */
 		var.activate = FB_ACTIVATE_TEST;
-		if (!do_fb_set_var(&var,1))
-			default_par=detected_mode;
+		if (!do_fb_set_var(&var, 1))
+			default_par = detected_mode;
 	}
 	/* If that also failed, try some default modes... */
-	if (! default_par) {
+	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)
+		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");
-			var=atafb_predefined[default_par-1];
+			var = atafb_predefined[default_par - 1];
 			var.activate = FB_ACTIVATE_TEST;
-			if (! do_fb_set_var(&var,1))
+			if (!do_fb_set_var(&var,1))
 				break;	/* ok */
 		}
 	}
-	min_mem=var.xres_virtual * var.yres_virtual * var.bits_per_pixel/8;
+	min_mem = var.xres_virtual * var.yres_virtual * var.bits_per_pixel / 8;
 	if (default_mem_req < min_mem)
-		default_mem_req=min_mem;
+		default_mem_req = min_mem;
 }
-
-static int
-atafb_switch(int con, struct fb_info *info)
-{
-	/* Do we have to save the colormap ? */
-	if (fb_display[info->currcon].cmap.len)
-		fb_get_cmap(&fb_display[info->currcon].cmap, 1, fbhw->getcolreg,
-			    info);
-	do_fb_set_var(&fb_display[con].var,1);
-	info->currcon=con;
-	/* Install new colormap */
-	do_install_cmap(con, info);
-	return 0;
-}
-
-int __init atafb_init(void)
-{
-	int pad;
-	int detected_mode;
-	unsigned long mem_req;
-
-	if (!MACH_IS_ATARI)
-	        return -ENXIO;
-
-	do {
-#ifdef ATAFB_EXT
-		if (external_addr) {
-			fbhw = &ext_switch;
-			atafb_ops.fb_setcolreg = &ext_setcolreg;
-			break;
-		}
-#endif
-#ifdef ATAFB_TT
-		if (ATARIHW_PRESENT(TT_SHIFTER)) {
-			fbhw = &tt_switch;
-			atafb_ops.fb_setcolreg = &tt_setcolreg;
-			break;
-		}
-#endif
-#ifdef ATAFB_FALCON
-		if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
-			fbhw = &falcon_switch;
-			atafb_ops.fb_setcolreg = &falcon_setcolreg;
-			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;
-			atafb_ops.fb_setcolreg = &stste_setcolreg;
-			break;
-		}
-		fbhw = &st_switch;
-		atafb_ops.fb_setcolreg = &stste_setcolreg;
-		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");
-#endif
-	} while (0);
-
-	/* Multisync monitor capabilities */
-	/* Atari-TOS defaults if no boot option present */
-	if (fb_info.monspecs.hfmin == 0) {
-	    fb_info.monspecs.hfmin = 31000;
-	    fb_info.monspecs.hfmax = 32000;
-	    fb_info.monspecs.vfmin = 58;
-	    fb_info.monspecs.vfmax = 62;
-	}
-
-	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 = PAGE_ALIGN(mem_req) + PAGE_SIZE;
-		screen_base = atari_stram_alloc(mem_req, "atafb");
-		if (!screen_base)
-			panic("Cannot allocate screen memory");
-		memset(screen_base, 0, mem_req);
-		pad = -(unsigned long)screen_base & (PAGE_SIZE-1);
-		screen_base+=pad;
-		real_screen_base=screen_base+ovsc_offset;
-		screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
-		st_ovsc_switch();
-		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(virt_to_phys(screen_base), screen_len);
-			kernel_set_cachemode(screen_base, screen_len,
-					     IOMAP_WRITETHROUGH);
-		}
-#ifdef ATAFB_EXT
-	}
-	else {
-		/* Map the video memory (physical address given) to somewhere
-		 * in the kernel address space.
-		 */
-		external_addr =
-		  ioremap_writethrough((unsigned long)external_addr,
-				       external_len);
-		if (external_vgaiobase)
-			external_vgaiobase =
-			  (unsigned long)ioremap(external_vgaiobase, 0x10000);
-		screen_base      =
-		real_screen_base = external_addr;
-		screen_len       = external_len & PAGE_MASK;
-		memset (screen_base, 0, external_len);
-	}
-#endif /* ATAFB_EXT */
-
-	strcpy(fb_info.modename, "Atari Builtin ");
-	fb_info.changevar = NULL;
-	fb_info.fbops = &atafb_ops;
-	fb_info.disp = &disp;
-	fb_info.currcon = -1;
-	fb_info.switch_con = &atafb_switch;
-	fb_info.updatevar = &fb_update_var;
-	fb_info.flags = FBINFO_FLAG_DEFAULT;
-	do_fb_set_var(&atafb_predefined[default_par-1], 1);
-	strcat(fb_info.modename, fb_var_names[default_par-1][0]);
-
-	atafb_get_var(&disp.var, -1, &fb_info);
-	atafb_set_disp(-1, &fb_info);
-	do_install_cmap(0, &fb_info);
-
-	if (register_framebuffer(&fb_info) < 0) {
-#ifdef ATAFB_EXT
-		if (external_addr) {
-			iounmap(external_addr);
-			external_addr = NULL;
-		}
-		if (external_vgaiobase) {
-			iounmap((void*)external_vgaiobase);
-			external_vgaiobase = 0;
-		}
-#endif
-		return -EINVAL;
-	}
-
-	printk("Determined %dx%d, depth %d\n",
-	       disp.var.xres, disp.var.yres, disp.var.bits_per_pixel);
-	if ((disp.var.xres != disp.var.xres_virtual) ||
-	    (disp.var.yres != disp.var.yres_virtual))
-	   printk("   virtual %dx%d\n",
-			  disp.var.xres_virtual, disp.var.yres_virtual);
-	printk("fb%d: %s frame buffer device, using %dK of video memory\n",
-	       fb_info.node, fb_info.modename, screen_len>>10);
-
-	/* TODO: This driver cannot be unloaded yet */
-	return 0;
-}
-
 
 #ifdef ATAFB_EXT
 static void __init atafb_setup_ext(char *spec)
 {
-	int		xres, xres_virtual, yres, depth, planes;
+	int xres, xres_virtual, yres, depth, planes;
 	unsigned long addr, len;
 	char *p;
 
···
 	 *
 	 * Even xres_virtual is available, we neither support panning nor hw-scrolling!
 	 */
-	if (!(p = strsep(&spec, ";")) || !*p)
-	    return;
+	p = strsep(&spec, ";");
+	if (!p || !*p)
+		return;
 	xres_virtual = xres = simple_strtoul(p, NULL, 10);
 	if (xres <= 0)
-	    return;
+		return;
 
-	if (!(p = strsep(&spec, ";")) || !*p)
-	    return;
+	p = strsep(&spec, ";");
+	if (!p || !*p)
+		return;
 	yres = simple_strtoul(p, NULL, 10);
 	if (yres <= 0)
-	    return;
+		return;
 
-	if (!(p = strsep(&spec, ";")) || !*p)
-	    return;
+	p = strsep(&spec, ";");
+	if (!p || !*p)
+		return;
 	depth = simple_strtoul(p, NULL, 10);
 	if (depth != 1 && depth != 2 && depth != 4 && depth != 8 &&
-		depth != 16 && depth != 24)
-	    return;
+	    depth != 16 && depth != 24)
+		return;
 
-	if (!(p = strsep(&spec, ";")) || !*p)
-	    return;
+	p = strsep(&spec, ";");
+	if (!p || !*p)
+		return;
 	if (*p == 'i')
 		planes = FB_TYPE_INTERLEAVED_PLANES;
 	else if (*p == 'p')
···
 	else if (*p == 'n')
 		planes = FB_TYPE_PLANES;
 	else if (*p == 't')
-		planes = -1; /* true color */
+		planes = -1;		/* true color */
 	else
 		return;
 
-
-	if (!(p = strsep(&spec, ";")) || !*p)
+	p = strsep(&spec, ";");
+	if (!p || !*p)
 		return;
 	addr = simple_strtoul(p, NULL, 0);
 
-	if (!(p = strsep(&spec, ";")) || !*p)
-		len = xres*yres*depth/8;
+	p = strsep(&spec, ";");
+	if (!p || !*p)
+		len = xres * yres * depth / 8;
 	else
 		len = simple_strtoul(p, NULL, 0);
 
-	if ((p = strsep(&spec, ";")) && *p) {
-		external_vgaiobase=simple_strtoul(p, NULL, 0);
-	}
+	p = strsep(&spec, ";");
+	if (p && *p)
+		external_vgaiobase = simple_strtoul(p, NULL, 0);
 
-	if ((p = strsep(&spec, ";")) && *p) {
+	p = strsep(&spec, ";");
+	if (p && *p) {
 		external_bitspercol = simple_strtoul(p, NULL, 0);
 		if (external_bitspercol > 8)
 			external_bitspercol = 8;
···
 			external_bitspercol = 1;
 	}
 
-	if ((p = strsep(&spec, ";")) && *p) {
+	p = strsep(&spec, ";");
+	if (p && *p) {
 		if (!strcmp(p, "vga"))
 			external_card_type = IS_VGA;
 		if (!strcmp(p, "mv300"))
 			external_card_type = IS_MV300;
 	}
 
-	if ((p = strsep(&spec, ";")) && *p) {
+	p = strsep(&spec, ";");
+	if (p && *p) {
 		xres_virtual = simple_strtoul(p, NULL, 10);
 		if (xres_virtual < xres)
 			xres_virtual = xres;
-		if (xres_virtual*yres*depth/8 > len)
-			len=xres_virtual*yres*depth/8;
+		if (xres_virtual * yres * depth / 8 > len)
+			len = xres_virtual * yres * depth / 8;
 	}
 
-	external_xres  = xres;
-	external_xres_virtual  = xres_virtual;
-	external_yres  = yres;
+	external_xres = xres;
+	external_xres_virtual = xres_virtual;
+	external_yres = yres;
 	external_depth = depth;
 	external_pmode = planes;
-	external_addr  = (void *)addr;
-	external_len   = len;
+	external_addr = (void *)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;
-	    }
+	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;
+		}
+	}
 }
 #endif /* ATAFB_EXT */
-
 
 static void __init atafb_setup_int(char *spec)
 {
 	/* Format to config extended internal video hardware like OverScan:
-	"internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
-	Explanation:
-	<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
-	*/
+	 * "internal:<xres>;<yres>;<xres_max>;<yres_max>;<offset>"
+	 * Explanation:
+	 * <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;
 
···
 	xres = simple_strtoul(p, NULL, 10);
 	if (!(p = strsep(&spec, ";")) || !*p)
 		return;
-	sttt_xres=xres;
-	tt_yres=st_yres=simple_strtoul(p, NULL, 10);
-	if ((p=strsep(&spec, ";")) && *p) {
-		sttt_xres_virtual=simple_strtoul(p, NULL, 10);
-	}
-	if ((p=strsep(&spec, ";")) && *p) {
-		sttt_yres_virtual=simple_strtoul(p, NULL, 0);
-	}
-	if ((p=strsep(&spec, ";")) && *p) {
-		ovsc_offset=simple_strtoul(p, NULL, 0);
-	}
+	sttt_xres = xres;
+	tt_yres = st_yres = simple_strtoul(p, NULL, 10);
+	if ((p = strsep(&spec, ";")) && *p)
+		sttt_xres_virtual = simple_strtoul(p, NULL, 10);
+	if ((p = strsep(&spec, ";")) && *p)
+		sttt_yres_virtual = simple_strtoul(p, NULL, 0);
+	if ((p = strsep(&spec, ";")) && *p)
+		ovsc_offset = simple_strtoul(p, NULL, 0);
 
 	if (ovsc_offset || (sttt_yres_virtual != st_yres))
-		use_hwscroll=0;
+		use_hwscroll = 0;
 }
-
 
 #ifdef ATAFB_FALCON
 static void __init atafb_setup_mcap(char *spec)
···
 }
 #endif /* ATAFB_FALCON */
 
-
 static void __init atafb_setup_user(char *spec)
 {
 	/* Format of user defined video mode is: <xres>;<yres>;<depth>
···
 	char *p;
 	int xres, yres, depth, temp;
 
-	if (!(p = strsep(&spec, ";")) || !*p)
+	p = strsep(&spec, ";");
+	if (!p || !*p)
 		return;
 	xres = simple_strtoul(p, NULL, 10);
-	if (!(p = strsep(&spec, ";")) || !*p)
+	p = strsep(&spec, ";");
+	if (!p || !*p)
 		return;
 	yres = simple_strtoul(p, NULL, 10);
-	if (!(p = strsep(&spec, "")) || !*p)
+	p = strsep(&spec, "");
+	if (!p || !*p)
 		return;
 	depth = simple_strtoul(p, NULL, 10);
-	if ((temp=get_video_mode("user0"))) {
-		default_par=temp;
-		atafb_predefined[default_par-1].xres = xres;
-		atafb_predefined[default_par-1].yres = yres;
-		atafb_predefined[default_par-1].bits_per_pixel = depth;
+	temp = get_video_mode("user0");
+	if (temp) {
+		default_par = temp;
+		atafb_predefined[default_par - 1].xres = xres;
+		atafb_predefined[default_par - 1].yres = yres;
+		atafb_predefined[default_par - 1].bits_per_pixel = depth;
 	}
 }
 
-int __init atafb_setup( char *options )
+int __init atafb_setup(char *options)
 {
-    char *this_opt;
-    int temp;
+	char *this_opt;
+	int temp;
 
-    fb_info.fontname[0] = '\0';
-
-    if (!options || !*options)
+	if (!options || !*options)
 		return 0;
-    
-    while ((this_opt = strsep(&options, ",")) != 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;
-	}
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt)
+			continue;
+		if ((temp = get_video_mode(this_opt))) {
+			default_par = temp;
+			mode_option = this_opt;
+		} else if (!strcmp(this_opt, "inverse"))
+			inverse = 1;
+		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;
+		}
 #ifdef ATAFB_EXT
-	else if (!strcmp(this_opt,"mv300")) {
-		external_bitspercol = 8;
-		external_card_type = IS_MV300;
-	}
-	else if (!strncmp(this_opt,"external:",9))
-		atafb_setup_ext(this_opt+9);
+		else if (!strcmp(this_opt, "mv300")) {
+			external_bitspercol = 8;
+			external_card_type = IS_MV300;
+		} else if (!strncmp(this_opt, "external:", 9))
+			atafb_setup_ext(this_opt + 9);
 #endif
-	else if (!strncmp(this_opt,"internal:",9))
-		atafb_setup_int(this_opt+9);
+		else if (!strncmp(this_opt, "internal:", 9))
+			atafb_setup_int(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))
-		atafb_setup_mcap(this_opt+11);
+		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))
+			atafb_setup_mcap(this_opt + 11);
 #endif
-	else if (!strcmp(this_opt, "keep"))
-		DontCalcRes = 1;
-	else if (!strncmp(this_opt, "R", 1))
-		atafb_setup_user(this_opt+1);
-    }
-    return 0;
+		else if (!strcmp(this_opt, "keep"))
+			DontCalcRes = 1;
+		else if (!strncmp(this_opt, "R", 1))
+			atafb_setup_user(this_opt + 1);
+	}
+	return 0;
 }
+
+int __init atafb_init(void)
+{
+	int pad;
+	int detected_mode;
+	unsigned int defmode = 0;
+	unsigned long mem_req;
+
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("atafb", &option))
+		return -ENODEV;
+	atafb_setup(option);
+#endif
+	printk("atafb_init: start\n");
+
+	if (!MACH_IS_ATARI)
+		return -ENXIO;
+
+	do {
+#ifdef ATAFB_EXT
+		if (external_addr) {
+			printk("atafb_init: initializing external hw\n");
+			fbhw = &ext_switch;
+			atafb_ops.fb_setcolreg = &ext_setcolreg;
+			defmode = DEFMODE_EXT;
+			break;
+		}
+#endif
+#ifdef ATAFB_TT
+		if (ATARIHW_PRESENT(TT_SHIFTER)) {
+			printk("atafb_init: initializing TT hw\n");
+			fbhw = &tt_switch;
+			atafb_ops.fb_setcolreg = &tt_setcolreg;
+			defmode = DEFMODE_TT;
+			break;
+		}
+#endif
+#ifdef ATAFB_FALCON
+		if (ATARIHW_PRESENT(VIDEL_SHIFTER)) {
+			printk("atafb_init: initializing Falcon hw\n");
+			fbhw = &falcon_switch;
+			atafb_ops.fb_setcolreg = &falcon_setcolreg;
+			request_irq(IRQ_AUTO_4, falcon_vbl_switcher, IRQ_TYPE_PRIO,
+			            "framebuffer/modeswitch", falcon_vbl_switcher);
+			defmode = DEFMODE_F30;
+			break;
+		}
+#endif
+#ifdef ATAFB_STE
+		if (ATARIHW_PRESENT(STND_SHIFTER) ||
+		    ATARIHW_PRESENT(EXTD_SHIFTER)) {
+			printk("atafb_init: initializing ST/E hw\n");
+			fbhw = &st_switch;
+			atafb_ops.fb_setcolreg = &stste_setcolreg;
+			defmode = DEFMODE_STE;
+			break;
+		}
+		fbhw = &st_switch;
+		atafb_ops.fb_setcolreg = &stste_setcolreg;
+		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");
+#endif
+	} while (0);
+
+	/* Multisync monitor capabilities */
+	/* Atari-TOS defaults if no boot option present */
+	if (fb_info.monspecs.hfmin == 0) {
+		fb_info.monspecs.hfmin = 31000;
+		fb_info.monspecs.hfmax = 32000;
+		fb_info.monspecs.vfmin = 58;
+		fb_info.monspecs.vfmax = 62;
+	}
+
+	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 = PAGE_ALIGN(mem_req) + PAGE_SIZE;
+		screen_base = atari_stram_alloc(mem_req, "atafb");
+		if (!screen_base)
+			panic("Cannot allocate screen memory");
+		memset(screen_base, 0, mem_req);
+		pad = -(unsigned long)screen_base & (PAGE_SIZE - 1);
+		screen_base += pad;
+		real_screen_base = screen_base + ovsc_offset;
+		screen_len = (mem_req - pad - ovsc_offset) & PAGE_MASK;
+		st_ovsc_switch();
+		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(virt_to_phys(screen_base), screen_len);
+			kernel_set_cachemode(screen_base, screen_len,
+					     IOMAP_WRITETHROUGH);
+		}
+		printk("atafb: screen_base %p real_screen_base %p screen_len %d\n",
+			screen_base, real_screen_base, screen_len);
+#ifdef ATAFB_EXT
+	} else {
+		/* Map the video memory (physical address given) to somewhere
+		 * in the kernel address space.
+		 */
+		external_addr = ioremap_writethrough((unsigned long)external_addr,
+						     external_len);
+		if (external_vgaiobase)
+			external_vgaiobase =
+			  (unsigned long)ioremap(external_vgaiobase, 0x10000);
+		screen_base =
+		real_screen_base = external_addr;
+		screen_len = external_len & PAGE_MASK;
+		memset (screen_base, 0, external_len);
+	}
+#endif /* ATAFB_EXT */
+
+//	strcpy(fb_info.mode->name, "Atari Builtin ");
+	fb_info.fbops = &atafb_ops;
+	// try to set default (detected; requested) var
+	do_fb_set_var(&atafb_predefined[default_par - 1], 1);
+	// reads hw state into current par, which may not be sane yet
+	ata_get_par(&current_par);
+	fb_info.par = &current_par;
+	// tries to read from HW which may not be initialized yet
+	// so set sane var first, then call atafb_set_par
+	atafb_get_var(&fb_info.var, &fb_info);
+	fb_info.flags = FBINFO_FLAG_DEFAULT;
+
+	if (!fb_find_mode(&fb_info.var, &fb_info, mode_option, atafb_modedb,
+			  NUM_TOTAL_MODES, &atafb_modedb[defmode],
+			  fb_info.var.bits_per_pixel)) {
+		return -EINVAL;
+	}
+
+	atafb_set_disp(&fb_info);
+
+	fb_alloc_cmap(&(fb_info.cmap), 1 << fb_info.var.bits_per_pixel, 0);
+
+
+	printk("Determined %dx%d, depth %d\n",
+	       fb_info.var.xres, fb_info.var.yres, fb_info.var.bits_per_pixel);
+	if ((fb_info.var.xres != fb_info.var.xres_virtual) ||
+	    (fb_info.var.yres != fb_info.var.yres_virtual))
+		printk("   virtual %dx%d\n", fb_info.var.xres_virtual,
+		       fb_info.var.yres_virtual);
+
+	if (register_framebuffer(&fb_info) < 0) {
+#ifdef ATAFB_EXT
+		if (external_addr) {
+			iounmap(external_addr);
+			external_addr = NULL;
+		}
+		if (external_vgaiobase) {
+			iounmap((void*)external_vgaiobase);
+			external_vgaiobase = 0;
+		}
+#endif
+		return -EINVAL;
+	}
+
+	// FIXME: mode needs setting!
+	//printk("fb%d: %s frame buffer device, using %dK of video memory\n",
+	//       fb_info.node, fb_info.mode->name, screen_len>>10);
+	printk("fb%d: frame buffer device, using %dK of video memory\n",
+	       fb_info.node, screen_len >> 10);
+
+	/* TODO: This driver cannot be unloaded yet */
+	return 0;
+}
+
+module_init(atafb_init);
 
 #ifdef MODULE
 MODULE_LICENSE("GPL");
 
-int init_module(void)
+int cleanup_module(void)
 {
-	return atafb_init();
+	unregister_framebuffer(&fb_info);
+	return atafb_deinit();
 }
 #endif /* MODULE */

drivers/video/atafb.h

···
+#ifndef _VIDEO_ATAFB_H
+#define _VIDEO_ATAFB_H
+
+void atafb_mfb_copyarea(struct fb_info *info, u_long next_line, int sy, int sx, int dy,
+			int dx, int height, int width);
+void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
+			int sy, int sx, int height, int width);
+void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
+			int dy, int dx, u32 width,
+			const u8 *data, u32 bgcolor, u32 fgcolor);
+
+void atafb_iplan2p2_copyarea(struct fb_info *info, u_long next_line, int sy, int sx, int dy,
+			     int dx, int height, int width);
+void atafb_iplan2p2_fillrect(struct fb_info *info, u_long next_line, u32 color,
+			     int sy, int sx, int height, int width);
+void atafb_iplan2p2_linefill(struct fb_info *info, u_long next_line,
+			     int dy, int dx, u32 width,
+			     const u8 *data, u32 bgcolor, u32 fgcolor);
+
+void atafb_iplan2p4_copyarea(struct fb_info *info, u_long next_line, int sy, int sx, int dy,
+			     int dx, int height, int width);
+void atafb_iplan2p4_fillrect(struct fb_info *info, u_long next_line, u32 color,
+			     int sy, int sx, int height, int width);
+void atafb_iplan2p4_linefill(struct fb_info *info, u_long next_line,
+			     int dy, int dx, u32 width,
+			     const u8 *data, u32 bgcolor, u32 fgcolor);
+
+void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line, int sy, int sx, int dy,
+			     int dx, int height, int width);
+void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,
+			     int sy, int sx, int height, int width);
+void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line,
+			     int dy, int dx, u32 width,
+			     const u8 *data, u32 bgcolor, u32 fgcolor);
+
+#endif /* _VIDEO_ATAFB_H */

drivers/video/atafb_iplan2p2.c

···
+/*
+ *  linux/drivers/video/iplan2p2.c -- Low level frame buffer operations for
+ *				      interleaved bitplanes à la Atari (2
+ *				      planes, 2 bytes interleave)
+ *
+ *	Created 5 Apr 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+
+#include <asm/setup.h>
+
+#include "atafb.h"
+
+#define BPL	2
+#include "atafb_utils.h"
+
+void atafb_iplan2p2_copyarea(struct fb_info *info, u_long next_line,
+			     int sy, int sx, int dy, int dx,
+			     int height, int width)
+{
+	/*  bmove() has to distinguish two major cases: If both, source and
+	 *  destination, start at even addresses or both are at odd
+	 *  addresses, just the first odd and last even column (if present)
+	 *  require special treatment (memmove_col()). The rest between
+	 *  then can be copied by normal operations, because all adjacent
+	 *  bytes are affected and are to be stored in the same order.
+	 *    The pathological case is when the move should go from an odd
+	 *  address to an even or vice versa. Since the bytes in the plane
+	 *  words must be assembled in new order, it seems wisest to make
+	 *  all movements by memmove_col().
+	 */
+
+	u8 *src, *dst;
+	u32 *s, *d;
+	int w, l , i, j;
+	u_int colsize;
+	u_int upwards = (dy < sy) || (dy == sy && dx < sx);
+
+	colsize = height;
+	if (!((sx ^ dx) & 15)) {
+		/* odd->odd or even->even */
+
+		if (upwards) {
+			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
+			if (sx & 15) {
+				memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
+				src += BPL * 2;
+				dst += BPL * 2;
+				width -= 8;
+			}
+			w = width >> 4;
+			if (w) {
+				s = (u32 *)src;
+				d = (u32 *)dst;
+				w *= BPL / 2;
+				l = next_line - w * 4;
+				for (j = height; j > 0; j--) {
+					for (i = w; i > 0; i--)
+						*d++ = *s++;
+					s = (u32 *)((u8 *)s + l);
+					d = (u32 *)((u8 *)d + l);
+				}
+			}
+			if (width & 15)
+				memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
+					      0xff00ff00, height, next_line - BPL * 2);
+		} else {
+			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
+
+			if ((sx + width) & 15) {
+				src -= BPL * 2;
+				dst -= BPL * 2;
+				memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
+				width -= 8;
+			}
+			w = width >> 4;
+			if (w) {
+				s = (u32 *)src;
+				d = (u32 *)dst;
+				w *= BPL / 2;
+				l = next_line - w * 4;
+				for (j = height; j > 0; j--) {
+					for (i = w; i > 0; i--)
+						*--d = *--s;
+					s = (u32 *)((u8 *)s - l);
+					d = (u32 *)((u8 *)d - l);
+				}
+			}
+			if (sx & 15)
+				memmove32_col(dst - (width - 16) / (8 / BPL),
+					      src - (width - 16) / (8 / BPL),
+					      0xff00ff, colsize, -next_line - BPL * 2);
+		}
+	} else {
+		/* odd->even or even->odd */
+		if (upwards) {
+			u32 *src32, *dst32;
+			u32 pval[4], v, v1, mask;
+			int i, j, w, f;
+
+			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
+
+			mask = 0xff00ff00;
+			f = 0;
+			w = width;
+			if (sx & 15) {
+				f = 1;
+				w += 8;
+			}
+			if ((sx + width) & 15)
+				f |= 2;
+			w >>= 4;
+			for (i = height; i; i--) {
+				src32 = (u32 *)src;
+				dst32 = (u32 *)dst;
+
+				if (f & 1) {
+					pval[0] = (*src32++ << 8) & mask;
+				} else {
+					pval[0] = dst32[0] & mask;
+				}
+
+				for (j = w; j > 0; j--) {
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[0] | (v1 >> 8);
+					pval[0] = (v ^ v1) << 8;
+				}
+
+				if (f & 2) {
+					dst32[0] = (dst32[0] & mask) | pval[0];
+				}
+
+				src += next_line;
+				dst += next_line;
+			}
+		} else {
+			u32 *src32, *dst32;
+			u32 pval[4], v, v1, mask;
+			int i, j, w, f;
+
+			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
+
+			mask = 0xff00ff;
+			f = 0;
+			w = width;
+			if ((dx + width) & 15)
+				f = 1;
+			if (sx & 15) {
+				f |= 2;
+				w += 8;
+			}
+			w >>= 4;
+			for (i = height; i; i--) {
+				src32 = (u32 *)src;
+				dst32 = (u32 *)dst;
+
+				if (f & 1) {
+					pval[0] = dst32[-1] & mask;
+				} else {
+					pval[0] = (*--src32 >> 8) & mask;
+				}
+
+				for (j = w; j > 0; j--) {
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[0] | (v1 << 8);
+					pval[0] = (v ^ v1) >> 8;
+				}
+
+				if (!(f & 2)) {
+					dst32[-1] = (dst32[-1] & mask) | pval[0];
+				}
+
+				src -= next_line;
+				dst -= next_line;
+			}
+		}
+	}
+}
+
+void atafb_iplan2p2_fillrect(struct fb_info *info, u_long next_line, u32 color,
+                             int sy, int sx, int height, int width)
+{
+	u32 *dest;
+	int rows, i;
+	u32 cval[4];
+
+	dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
+	if (sx & 15) {
+		u8 *dest8 = (u8 *)dest + 1;
+
+		expand8_col2mask(color, cval);
+
+		for (i = height; i; i--) {
+			fill8_col(dest8, cval);
+			dest8 += next_line;
+		}
+		dest += BPL / 2;
+		width -= 8;
+	}
+
+	expand16_col2mask(color, cval);
+	rows = width >> 4;
+	if (rows) {
+		u32 *d = dest;
+		u32 off = next_line - rows * BPL * 2;
+		for (i = height; i; i--) {
+			d = fill16_col(d, rows, cval);
+			d = (u32 *)((long)d + off);
+		}
+		dest += rows * BPL / 2;
+		width &= 15;
+	}
+
+	if (width) {
+		u8 *dest8 = (u8 *)dest;
+
+		expand8_col2mask(color, cval);
+
+		for (i = height; i; i--) {
+			fill8_col(dest8, cval);
+			dest8 += next_line;
+		}
+	}
+}
+
+void atafb_iplan2p2_linefill(struct fb_info *info, u_long next_line,
+                             int dy, int dx, u32 width,
+                             const u8 *data, u32 bgcolor, u32 fgcolor)
+{
+	u32 *dest;
+	const u16 *data16;
+	int rows;
+	u32 fgm[4], bgm[4], m;
+
+	dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
+	if (dx & 15) {
+		fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
+		dest += BPL / 2;
+		width -= 8;
+	}
+
+	if (width >= 16) {
+		data16 = (const u16 *)data;
+		expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
+
+		for (rows = width / 16; rows; rows--) {
+			u16 d = *data16++;
+			m = d | ((u32)d << 16);
+			*dest++ = (m & fgm[0]) ^ bgm[0];
+		}
+
+		data = (const u8 *)data16;
+		width &= 15;
+	}
+
+	if (width)
+		fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
+}
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+	return 0;
+}
+
+void cleanup_module(void)
+{
+}
+#endif /* MODULE */
+
+
+    /*
+     *  Visible symbols for modules
+     */
+
+EXPORT_SYMBOL(atafb_iplan2p2_copyarea);
+EXPORT_SYMBOL(atafb_iplan2p2_fillrect);
+EXPORT_SYMBOL(atafb_iplan2p2_linefill);

drivers/video/atafb_iplan2p4.c

···
+/*
+ *  linux/drivers/video/iplan2p4.c -- Low level frame buffer operations for
+ *				      interleaved bitplanes à la Atari (4
+ *				      planes, 2 bytes interleave)
+ *
+ *	Created 5 Apr 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+
+#include <asm/setup.h>
+
+#include "atafb.h"
+
+#define BPL	4
+#include "atafb_utils.h"
+
+void atafb_iplan2p4_copyarea(struct fb_info *info, u_long next_line,
+			     int sy, int sx, int dy, int dx,
+			     int height, int width)
+{
+	/*  bmove() has to distinguish two major cases: If both, source and
+	 *  destination, start at even addresses or both are at odd
+	 *  addresses, just the first odd and last even column (if present)
+	 *  require special treatment (memmove_col()). The rest between
+	 *  then can be copied by normal operations, because all adjacent
+	 *  bytes are affected and are to be stored in the same order.
+	 *    The pathological case is when the move should go from an odd
+	 *  address to an even or vice versa. Since the bytes in the plane
+	 *  words must be assembled in new order, it seems wisest to make
+	 *  all movements by memmove_col().
+	 */
+
+	u8 *src, *dst;
+	u32 *s, *d;
+	int w, l , i, j;
+	u_int colsize;
+	u_int upwards = (dy < sy) || (dy == sy && dx < sx);
+
+	colsize = height;
+	if (!((sx ^ dx) & 15)) {
+		/* odd->odd or even->even */
+
+		if (upwards) {
+			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
+			if (sx & 15) {
+				memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
+				src += BPL * 2;
+				dst += BPL * 2;
+				width -= 8;
+			}
+			w = width >> 4;
+			if (w) {
+				s = (u32 *)src;
+				d = (u32 *)dst;
+				w *= BPL / 2;
+				l = next_line - w * 4;
+				for (j = height; j > 0; j--) {
+					for (i = w; i > 0; i--)
+						*d++ = *s++;
+					s = (u32 *)((u8 *)s + l);
+					d = (u32 *)((u8 *)d + l);
+				}
+			}
+			if (width & 15)
+				memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
+					      0xff00ff00, height, next_line - BPL * 2);
+		} else {
+			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
+
+			if ((sx + width) & 15) {
+				src -= BPL * 2;
+				dst -= BPL * 2;
+				memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
+				width -= 8;
+			}
+			w = width >> 4;
+			if (w) {
+				s = (u32 *)src;
+				d = (u32 *)dst;
+				w *= BPL / 2;
+				l = next_line - w * 4;
+				for (j = height; j > 0; j--) {
+					for (i = w; i > 0; i--)
+						*--d = *--s;
+					s = (u32 *)((u8 *)s - l);
+					d = (u32 *)((u8 *)d - l);
+				}
+			}
+			if (sx & 15)
+				memmove32_col(dst - (width - 16) / (8 / BPL),
+					      src - (width - 16) / (8 / BPL),
+					      0xff00ff, colsize, -next_line - BPL * 2);
+		}
+	} else {
+		/* odd->even or even->odd */
+		if (upwards) {
+			u32 *src32, *dst32;
+			u32 pval[4], v, v1, mask;
+			int i, j, w, f;
+
+			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
+
+			mask = 0xff00ff00;
+			f = 0;
+			w = width;
+			if (sx & 15) {
+				f = 1;
+				w += 8;
+			}
+			if ((sx + width) & 15)
+				f |= 2;
+			w >>= 4;
+			for (i = height; i; i--) {
+				src32 = (u32 *)src;
+				dst32 = (u32 *)dst;
+
+				if (f & 1) {
+					pval[0] = (*src32++ << 8) & mask;
+					pval[1] = (*src32++ << 8) & mask;
+				} else {
+					pval[0] = dst32[0] & mask;
+					pval[1] = dst32[1] & mask;
+				}
+
+				for (j = w; j > 0; j--) {
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[0] | (v1 >> 8);
+					pval[0] = (v ^ v1) << 8;
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[1] | (v1 >> 8);
+					pval[1] = (v ^ v1) << 8;
+				}
+
+				if (f & 2) {
+					dst32[0] = (dst32[0] & mask) | pval[0];
+					dst32[1] = (dst32[1] & mask) | pval[1];
+				}
+
+				src += next_line;
+				dst += next_line;
+			}
+		} else {
+			u32 *src32, *dst32;
+			u32 pval[4], v, v1, mask;
+			int i, j, w, f;
+
+			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
+
+			mask = 0xff00ff;
+			f = 0;
+			w = width;
+			if ((dx + width) & 15)
+				f = 1;
+			if (sx & 15) {
+				f |= 2;
+				w += 8;
+			}
+			w >>= 4;
+			for (i = height; i; i--) {
+				src32 = (u32 *)src;
+				dst32 = (u32 *)dst;
+
+				if (f & 1) {
+					pval[0] = dst32[-1] & mask;
+					pval[1] = dst32[-2] & mask;
+				} else {
+					pval[0] = (*--src32 >> 8) & mask;
+					pval[1] = (*--src32 >> 8) & mask;
+				}
+
+				for (j = w; j > 0; j--) {
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[0] | (v1 << 8);
+					pval[0] = (v ^ v1) >> 8;
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[1] | (v1 << 8);
+					pval[1] = (v ^ v1) >> 8;
+				}
+
+				if (!(f & 2)) {
+					dst32[-1] = (dst32[-1] & mask) | pval[0];
+					dst32[-2] = (dst32[-2] & mask) | pval[1];
+				}
+
+				src -= next_line;
+				dst -= next_line;
+			}
+		}
+	}
+}
+
+void atafb_iplan2p4_fillrect(struct fb_info *info, u_long next_line, u32 color,
+                             int sy, int sx, int height, int width)
+{
+	u32 *dest;
+	int rows, i;
+	u32 cval[4];
+
+	dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
+	if (sx & 15) {
+		u8 *dest8 = (u8 *)dest + 1;
+
+		expand8_col2mask(color, cval);
+
+		for (i = height; i; i--) {
+			fill8_col(dest8, cval);
+			dest8 += next_line;
+		}
+		dest += BPL / 2;
+		width -= 8;
+	}
+
+	expand16_col2mask(color, cval);
+	rows = width >> 4;
+	if (rows) {
+		u32 *d = dest;
+		u32 off = next_line - rows * BPL * 2;
+		for (i = height; i; i--) {
+			d = fill16_col(d, rows, cval);
+			d = (u32 *)((long)d + off);
+		}
+		dest += rows * BPL / 2;
+		width &= 15;
+	}
+
+	if (width) {
+		u8 *dest8 = (u8 *)dest;
+
+		expand8_col2mask(color, cval);
+
+		for (i = height; i; i--) {
+			fill8_col(dest8, cval);
+			dest8 += next_line;
+		}
+	}
+}
+
+void atafb_iplan2p4_linefill(struct fb_info *info, u_long next_line,
+                             int dy, int dx, u32 width,
+                             const u8 *data, u32 bgcolor, u32 fgcolor)
+{
+	u32 *dest;
+	const u16 *data16;
+	int rows;
+	u32 fgm[4], bgm[4], m;
+
+	dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
+	if (dx & 15) {
+		fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
+		dest += BPL / 2;
+		width -= 8;
+	}
+
+	if (width >= 16) {
+		data16 = (const u16 *)data;
+		expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
+
+		for (rows = width / 16; rows; rows--) {
+			u16 d = *data16++;
+			m = d | ((u32)d << 16);
+			*dest++ = (m & fgm[0]) ^ bgm[0];
+			*dest++ = (m & fgm[1]) ^ bgm[1];
+		}
+
+		data = (const u8 *)data16;
+		width &= 15;
+	}
+
+	if (width)
+		fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
+}
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+	return 0;
+}
+
+void cleanup_module(void)
+{
+}
+#endif /* MODULE */
+
+
+    /*
+     *  Visible symbols for modules
+     */
+
+EXPORT_SYMBOL(atafb_iplan2p4_copyarea);
+EXPORT_SYMBOL(atafb_iplan2p4_fillrect);
+EXPORT_SYMBOL(atafb_iplan2p4_linefill);

drivers/video/atafb_iplan2p8.c

···
+/*
+ *  linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for
+ *				      interleaved bitplanes à la Atari (8
+ *				      planes, 2 bytes interleave)
+ *
+ *	Created 5 Apr 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+
+#include <asm/setup.h>
+
+#include "atafb.h"
+
+#define BPL	8
+#include "atafb_utils.h"
+
+
+/* Copies a 8 plane column from 's', height 'h', to 'd'. */
+
+/* This expands a 8 bit color into two longs for two movepl (8 plane)
+ * operations.
+ */
+
+void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line,
+			     int sy, int sx, int dy, int dx,
+			     int height, int width)
+{
+	/*  bmove() has to distinguish two major cases: If both, source and
+	 *  destination, start at even addresses or both are at odd
+	 *  addresses, just the first odd and last even column (if present)
+	 *  require special treatment (memmove_col()). The rest between
+	 *  then can be copied by normal operations, because all adjacent
+	 *  bytes are affected and are to be stored in the same order.
+	 *    The pathological case is when the move should go from an odd
+	 *  address to an even or vice versa. Since the bytes in the plane
+	 *  words must be assembled in new order, it seems wisest to make
+	 *  all movements by memmove_col().
+	 */
+
+	u8 *src, *dst;
+	u32 *s, *d;
+	int w, l , i, j;
+	u_int colsize;
+	u_int upwards = (dy < sy) || (dy == sy && dx < sx);
+
+	colsize = height;
+	if (!((sx ^ dx) & 15)) {
+		/* odd->odd or even->even */
+
+		if (upwards) {
+			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
+			if (sx & 15) {
+				memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
+				src += BPL * 2;
+				dst += BPL * 2;
+				width -= 8;
+			}
+			w = width >> 4;
+			if (w) {
+				s = (u32 *)src;
+				d = (u32 *)dst;
+				w *= BPL / 2;
+				l = next_line - w * 4;
+				for (j = height; j > 0; j--) {
+					for (i = w; i > 0; i--)
+						*d++ = *s++;
+					s = (u32 *)((u8 *)s + l);
+					d = (u32 *)((u8 *)d + l);
+				}
+			}
+			if (width & 15)
+				memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
+					      0xff00ff00, height, next_line - BPL * 2);
+		} else {
+			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
+
+			if ((sx + width) & 15) {
+				src -= BPL * 2;
+				dst -= BPL * 2;
+				memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
+				width -= 8;
+			}
+			w = width >> 4;
+			if (w) {
+				s = (u32 *)src;
+				d = (u32 *)dst;
+				w *= BPL / 2;
+				l = next_line - w * 4;
+				for (j = height; j > 0; j--) {
+					for (i = w; i > 0; i--)
+						*--d = *--s;
+					s = (u32 *)((u8 *)s - l);
+					d = (u32 *)((u8 *)d - l);
+				}
+			}
+			if (sx & 15)
+				memmove32_col(dst - (width - 16) / (8 / BPL),
+					      src - (width - 16) / (8 / BPL),
+					      0xff00ff, colsize, -next_line - BPL * 2);
+		}
+	} else {
+		/* odd->even or even->odd */
+		if (upwards) {
+			u32 *src32, *dst32;
+			u32 pval[4], v, v1, mask;
+			int i, j, w, f;
+
+			src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
+
+			mask = 0xff00ff00;
+			f = 0;
+			w = width;
+			if (sx & 15) {
+				f = 1;
+				w += 8;
+			}
+			if ((sx + width) & 15)
+				f |= 2;
+			w >>= 4;
+			for (i = height; i; i--) {
+				src32 = (u32 *)src;
+				dst32 = (u32 *)dst;
+
+				if (f & 1) {
+					pval[0] = (*src32++ << 8) & mask;
+					pval[1] = (*src32++ << 8) & mask;
+					pval[2] = (*src32++ << 8) & mask;
+					pval[3] = (*src32++ << 8) & mask;
+				} else {
+					pval[0] = dst32[0] & mask;
+					pval[1] = dst32[1] & mask;
+					pval[2] = dst32[2] & mask;
+					pval[3] = dst32[3] & mask;
+				}
+
+				for (j = w; j > 0; j--) {
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[0] | (v1 >> 8);
+					pval[0] = (v ^ v1) << 8;
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[1] | (v1 >> 8);
+					pval[1] = (v ^ v1) << 8;
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[2] | (v1 >> 8);
+					pval[2] = (v ^ v1) << 8;
+					v = *src32++;
+					v1 = v & mask;
+					*dst32++ = pval[3] | (v1 >> 8);
+					pval[3] = (v ^ v1) << 8;
+				}
+
+				if (f & 2) {
+					dst32[0] = (dst32[0] & mask) | pval[0];
+					dst32[1] = (dst32[1] & mask) | pval[1];
+					dst32[2] = (dst32[2] & mask) | pval[2];
+					dst32[3] = (dst32[3] & mask) | pval[3];
+				}
+
+				src += next_line;
+				dst += next_line;
+			}
+		} else {
+			u32 *src32, *dst32;
+			u32 pval[4], v, v1, mask;
+			int i, j, w, f;
+
+			src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
+			dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
+
+			mask = 0xff00ff;
+			f = 0;
+			w = width;
+			if ((dx + width) & 15)
+				f = 1;
+			if (sx & 15) {
+				f |= 2;
+				w += 8;
+			}
+			w >>= 4;
+			for (i = height; i; i--) {
+				src32 = (u32 *)src;
+				dst32 = (u32 *)dst;
+
+				if (f & 1) {
+					pval[0] = dst32[-1] & mask;
+					pval[1] = dst32[-2] & mask;
+					pval[2] = dst32[-3] & mask;
+					pval[3] = dst32[-4] & mask;
+				} else {
+					pval[0] = (*--src32 >> 8) & mask;
+					pval[1] = (*--src32 >> 8) & mask;
+					pval[2] = (*--src32 >> 8) & mask;
+					pval[3] = (*--src32 >> 8) & mask;
+				}
+
+				for (j = w; j > 0; j--) {
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[0] | (v1 << 8);
+					pval[0] = (v ^ v1) >> 8;
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[1] | (v1 << 8);
+					pval[1] = (v ^ v1) >> 8;
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[2] | (v1 << 8);
+					pval[2] = (v ^ v1) >> 8;
+					v = *--src32;
+					v1 = v & mask;
+					*--dst32 = pval[3] | (v1 << 8);
+					pval[3] = (v ^ v1) >> 8;
+				}
+
+				if (!(f & 2)) {
+					dst32[-1] = (dst32[-1] & mask) | pval[0];
+					dst32[-2] = (dst32[-2] & mask) | pval[1];
+					dst32[-3] = (dst32[-3] & mask) | pval[2];
+					dst32[-4] = (dst32[-4] & mask) | pval[3];
+				}
+
+				src -= next_line;
+				dst -= next_line;
+			}
+		}
+	}
+}
+
+void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,
+                             int sy, int sx, int height, int width)
+{
+	u32 *dest;
+	int rows, i;
+	u32 cval[4];
+
+	dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
+	if (sx & 15) {
+		u8 *dest8 = (u8 *)dest + 1;
+
+		expand8_col2mask(color, cval);
+
+		for (i = height; i; i--) {
+			fill8_col(dest8, cval);
+			dest8 += next_line;
+		}
+		dest += BPL / 2;
+		width -= 8;
+	}
+
+	expand16_col2mask(color, cval);
+	rows = width >> 4;
+	if (rows) {
+		u32 *d = dest;
+		u32 off = next_line - rows * BPL * 2;
+		for (i = height; i; i--) {
+			d = fill16_col(d, rows, cval);
+			d = (u32 *)((long)d + off);
+		}
+		dest += rows * BPL / 2;
+		width &= 15;
+	}
+
+	if (width) {
+		u8 *dest8 = (u8 *)dest;
+
+		expand8_col2mask(color, cval);
+
+		for (i = height; i; i--) {
+			fill8_col(dest8, cval);
+			dest8 += next_line;
+		}
+	}
+}
+
+void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line,
+			     int dy, int dx, u32 width,
+			     const u8 *data, u32 bgcolor, u32 fgcolor)
+{
+	u32 *dest;
+	const u16 *data16;
+	int rows;
+	u32 fgm[4], bgm[4], m;
+
+	dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
+	if (dx & 15) {
+		fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
+		dest += BPL / 2;
+		width -= 8;
+	}
+
+	if (width >= 16) {
+		data16 = (const u16 *)data;
+		expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
+
+		for (rows = width / 16; rows; rows--) {
+			u16 d = *data16++;
+			m = d | ((u32)d << 16);
+			*dest++ = (m & fgm[0]) ^ bgm[0];
+			*dest++ = (m & fgm[1]) ^ bgm[1];
+			*dest++ = (m & fgm[2]) ^ bgm[2];
+			*dest++ = (m & fgm[3]) ^ bgm[3];
+		}
+
+		data = (const u8 *)data16;
+		width &= 15;
+	}
+
+	if (width)
+		fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
+}
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+	return 0;
+}
+
+void cleanup_module(void)
+{
+}
+#endif /* MODULE */
+
+
+    /*
+     *  Visible symbols for modules
+     */
+
+EXPORT_SYMBOL(atafb_iplan2p8_copyarea);
+EXPORT_SYMBOL(atafb_iplan2p8_fillrect);
+EXPORT_SYMBOL(atafb_iplan2p8_linefill);

drivers/video/atafb_mfb.c

···
+/*
+ *  linux/drivers/video/mfb.c -- Low level frame buffer operations for
+ *				 monochrome
+ *
+ *	Created 5 Apr 1997 by Geert Uytterhoeven
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive for
+ *  more details.
+ */
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/fb.h>
+
+#include "atafb.h"
+#include "atafb_utils.h"
+
+
+    /*
+     *  Monochrome
+     */
+
+void atafb_mfb_copyarea(struct fb_info *info, u_long next_line,
+			int sy, int sx, int dy, int dx,
+			int height, int width)
+{
+	u8 *src, *dest;
+	u_int rows;
+
+	if (sx == 0 && dx == 0 && width == next_line) {
+		src = (u8 *)info->screen_base + sy * (width >> 3);
+		dest = (u8 *)info->screen_base + dy * (width >> 3);
+		fb_memmove(dest, src, height * (width >> 3));
+	} else if (dy <= sy) {
+		src = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
+		dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
+		for (rows = height; rows--;) {
+			fb_memmove(dest, src, width >> 3);
+			src += next_line;
+			dest += next_line;
+		}
+	} else {
+		src = (u8 *)info->screen_base + (sy + height - 1) * next_line + (sx >> 3);
+		dest = (u8 *)info->screen_base + (dy + height - 1) * next_line + (dx >> 3);
+		for (rows = height; rows--;) {
+			fb_memmove(dest, src, width >> 3);
+			src -= next_line;
+			dest -= next_line;
+		}
+	}
+}
+
+void atafb_mfb_fillrect(struct fb_info *info, u_long next_line, u32 color,
+			int sy, int sx, int height, int width)
+{
+	u8 *dest;
+	u_int rows;
+
+	dest = (u8 *)info->screen_base + sy * next_line + (sx >> 3);
+
+	if (sx == 0 && width == next_line) {
+		if (color)
+			fb_memset255(dest, height * (width >> 3));
+		else
+			fb_memclear(dest, height * (width >> 3));
+	} else {
+		for (rows = height; rows--; dest += next_line) {
+			if (color)
+				fb_memset255(dest, width >> 3);
+			else
+				fb_memclear_small(dest, width >> 3);
+		}
+	}
+}
+
+void atafb_mfb_linefill(struct fb_info *info, u_long next_line,
+			int dy, int dx, u32 width,
+			const u8 *data, u32 bgcolor, u32 fgcolor)
+{
+	u8 *dest;
+	u_int rows;
+
+	dest = (u8 *)info->screen_base + dy * next_line + (dx >> 3);
+
+	for (rows = width / 8; rows--; /* check margins */ ) {
+		// use fast_memmove or fb_memmove
+		*dest++ = *data++;
+	}
+}
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+	return 0;
+}
+
+void cleanup_module(void)
+{
+}
+#endif /* MODULE */
+
+
+    /*
+     *  Visible symbols for modules
+     */
+
+EXPORT_SYMBOL(atafb_mfb_copyarea);
+EXPORT_SYMBOL(atafb_mfb_fillrect);
+EXPORT_SYMBOL(atafb_mfb_linefill);

drivers/video/atafb_utils.h

···
+#ifndef _VIDEO_ATAFB_UTILS_H
+#define _VIDEO_ATAFB_UTILS_H
+
+/* ================================================================= */
+/*                      Utility Assembler Functions                  */
+/* ================================================================= */
+
+/* ====================================================================== */
+
+/* Those of a delicate disposition might like to skip the next couple of
+ * pages.
+ *
+ * These functions are drop in replacements for memmove and
+ * memset(_, 0, _). However their five instances add at least a kilobyte
+ * to the object file. You have been warned.
+ *
+ * Not a great fan of assembler for the sake of it, but I think
+ * that these routines are at least 10 times faster than their C
+ * equivalents for large blits, and that's important to the lowest level of
+ * a graphics driver. Question is whether some scheme with the blitter
+ * would be faster. I suspect not for simple text system - not much
+ * asynchrony.
+ *
+ * Code is very simple, just gruesome expansion. Basic strategy is to
+ * increase data moved/cleared at each step to 16 bytes to reduce
+ * instruction per data move overhead. movem might be faster still
+ * For more than 15 bytes, we try to align the write direction on a
+ * longword boundary to get maximum speed. This is even more gruesome.
+ * Unaligned read/write used requires 68020+ - think this is a problem?
+ *
+ * Sorry!
+ */
+
+
+/* ++roman: I've optimized Robert's original versions in some minor
+ * aspects, e.g. moveq instead of movel, let gcc choose the registers,
+ * use movem in some places...
+ * For other modes than 1 plane, lots of more such assembler functions
+ * were needed (e.g. the ones using movep or expanding color values).
+ */
+
+/* ++andreas: more optimizations:
+   subl #65536,d0 replaced by clrw d0; subql #1,d0 for dbcc
+   addal is faster than addaw
+   movep is rather expensive compared to ordinary move's
+   some functions rewritten in C for clarity, no speed loss */
+
+static inline void *fb_memclear_small(void *s, size_t count)
+{
+	if (!count)
+		return 0;
+
+	asm volatile ("\n"
+		"	lsr.l	#1,%1 ; jcc 1f ; move.b %2,-(%0)\n"
+		"1:	lsr.l	#1,%1 ; jcc 1f ; move.w %2,-(%0)\n"
+		"1:	lsr.l	#1,%1 ; jcc 1f ; move.l %2,-(%0)\n"
+		"1:	lsr.l	#1,%1 ; jcc 1f ; move.l %2,-(%0) ; move.l %2,-(%0)\n"
+		"1:"
+		: "=a" (s), "=d" (count)
+		: "d" (0), "0" ((char *)s + count), "1" (count));
+	asm volatile ("\n"
+		"	subq.l  #1,%1\n"
+		"	jcs	3f\n"
+		"	move.l	%2,%%d4; move.l %2,%%d5; move.l %2,%%d6\n"
+		"2:	movem.l	%2/%%d4/%%d5/%%d6,-(%0)\n"
+		"	dbra	%1,2b\n"
+		"3:"
+		: "=a" (s), "=d" (count)
+		: "d" (0), "0" (s), "1" (count)
+		: "d4", "d5", "d6"
+		);
+
+	return 0;
+}
+
+
+static inline void *fb_memclear(void *s, size_t count)
+{
+	if (!count)
+		return 0;
+
+	if (count < 16) {
+		asm volatile ("\n"
+			"	lsr.l	#1,%1 ; jcc 1f ; clr.b (%0)+\n"
+			"1:	lsr.l	#1,%1 ; jcc 1f ; clr.w (%0)+\n"
+			"1:	lsr.l	#1,%1 ; jcc 1f ; clr.l (%0)+\n"
+			"1:	lsr.l	#1,%1 ; jcc 1f ; clr.l (%0)+ ; clr.l (%0)+\n"
+			"1:"
+			: "=a" (s), "=d" (count)
+			: "0" (s), "1" (count));
+	} else {
+		long tmp;
+		asm volatile ("\n"
+			"	move.l	%1,%2\n"
+			"	lsr.l	#1,%2 ; jcc 1f ; clr.b (%0)+ ; subq.w #1,%1\n"
+			"	lsr.l	#1,%2 ; jcs 2f\n"  /* %0 increased=>bit 2 switched*/
+			"	clr.w	(%0)+  ; subq.w  #2,%1 ; jra 2f\n"
+			"1:	lsr.l	#1,%2 ; jcc 2f\n"
+			"	clr.w	(%0)+  ; subq.w  #2,%1\n"
+			"2:	move.w	%1,%2; lsr.l #2,%1 ; jeq 6f\n"
+			"	lsr.l	#1,%1 ; jcc 3f ; clr.l (%0)+\n"
+			"3:	lsr.l	#1,%1 ; jcc 4f ; clr.l (%0)+ ; clr.l (%0)+\n"
+			"4:	subq.l	#1,%1 ; jcs 6f\n"
+			"5:	clr.l	(%0)+; clr.l (%0)+ ; clr.l (%0)+ ; clr.l (%0)+\n"
+			"	dbra	%1,5b ; clr.w %1; subq.l #1,%1; jcc 5b\n"
+			"6:	move.w	%2,%1; btst #1,%1 ; jeq 7f ; clr.w (%0)+\n"
+			"7:	btst	#0,%1 ; jeq 8f ; clr.b (%0)+\n"
+			"8:"
+			: "=a" (s), "=d" (count), "=d" (tmp)
+			: "0" (s), "1" (count));
+	}
+
+	return 0;
+}
+
+
+static inline void *fb_memset255(void *s, size_t count)
+{
+	if (!count)
+		return 0;
+
+	asm volatile ("\n"
+		"	lsr.l	#1,%1 ; jcc 1f ; move.b %2,-(%0)\n"
+		"1:	lsr.l	#1,%1 ; jcc 1f ; move.w %2,-(%0)\n"
+		"1:	lsr.l	#1,%1 ; jcc 1f ; move.l %2,-(%0)\n"
+		"1:	lsr.l	#1,%1 ; jcc 1f ; move.l %2,-(%0) ; move.l %2,-(%0)\n"
+		"1:"
+		: "=a" (s), "=d" (count)
+		: "d" (-1), "0" ((char *)s+count), "1" (count));
+	asm volatile ("\n"
+		"	subq.l	#1,%1 ; jcs 3f\n"
+		"	move.l	%2,%%d4; move.l %2,%%d5; move.l %2,%%d6\n"
+		"2:	movem.l	%2/%%d4/%%d5/%%d6,-(%0)\n"
+		"	dbra	%1,2b\n"
+		"3:"
+		: "=a" (s), "=d" (count)
+		: "d" (-1), "0" (s), "1" (count)
+		: "d4", "d5", "d6");
+
+	return 0;
+}
+
+
+static inline void *fb_memmove(void *d, const void *s, size_t count)
+{
+	if (d < s) {
+		if (count < 16) {
+			asm volatile ("\n"
+				"	lsr.l	#1,%2 ; jcc 1f ; move.b (%1)+,(%0)+\n"
+				"1:	lsr.l	#1,%2 ; jcc 1f ; move.w (%1)+,(%0)+\n"
+				"1:	lsr.l	#1,%2 ; jcc 1f ; move.l (%1)+,(%0)+\n"
+				"1:	lsr.l	#1,%2 ; jcc 1f ; move.l (%1)+,(%0)+ ; move.l (%1)+,(%0)+\n"
+				"1:"
+				: "=a" (d), "=a" (s), "=d" (count)
+				: "0" (d), "1" (s), "2" (count));
+		} else {
+			long tmp;
+			asm volatile ("\n"
+				"	move.l	%0,%3\n"
+				"	lsr.l	#1,%3 ; jcc 1f ; move.b (%1)+,(%0)+ ; subqw #1,%2\n"
+				"	lsr.l	#1,%3 ; jcs 2f\n"  /* %0 increased=>bit 2 switched*/
+				"	move.w	(%1)+,(%0)+  ; subqw  #2,%2 ; jra 2f\n"
+				"1:	lsr.l   #1,%3 ; jcc 2f\n"
+				"	move.w	(%1)+,(%0)+  ; subqw  #2,%2\n"
+				"2:	move.w	%2,%-; lsr.l #2,%2 ; jeq 6f\n"
+				"	lsr.l	#1,%2 ; jcc 3f ; move.l (%1)+,(%0)+\n"
+				"3:	lsr.l	#1,%2 ; jcc 4f ; move.l (%1)+,(%0)+ ; move.l (%1)+,(%0)+\n"
+				"4:	subq.l	#1,%2 ; jcs 6f\n"
+				"5:	move.l	(%1)+,(%0)+; move.l (%1)+,(%0)+\n"
+				"	move.l	(%1)+,(%0)+; move.l (%1)+,(%0)+\n"
+				"	dbra	%2,5b ; clr.w %2; subq.l #1,%2; jcc 5b\n"
+				"6:	move.w	%+,%2; btst #1,%2 ; jeq 7f ; move.w (%1)+,(%0)+\n"
+				"7:	btst	#0,%2 ; jeq 8f ; move.b (%1)+,(%0)+\n"
+				"8:"
+				: "=a" (d), "=a" (s), "=d" (count), "=d" (tmp)
+				: "0" (d), "1" (s), "2" (count));
+		}
+	} else {
+		if (count < 16) {
+			asm volatile ("\n"
+				"	lsr.l	#1,%2 ; jcc 1f ; move.b -(%1),-(%0)\n"
+				"1:	lsr.l	#1,%2 ; jcc 1f ; move.w -(%1),-(%0)\n"
+				"1:	lsr.l	#1,%2 ; jcc 1f ; move.l -(%1),-(%0)\n"
+				"1:	lsr.l	#1,%2 ; jcc 1f ; move.l -(%1),-(%0) ; move.l -(%1),-(%0)\n"
+				"1:"
+				: "=a" (d), "=a" (s), "=d" (count)
+				: "0" ((char *) d + count), "1" ((char *) s + count), "2" (count));
+		} else {
+			long tmp;
+
+			asm volatile ("\n"
+				"	move.l	%0,%3\n"
+				"	lsr.l	#1,%3 ; jcc 1f ; move.b -(%1),-(%0) ; subqw #1,%2\n"
+				"	lsr.l	#1,%3 ; jcs 2f\n"  /* %0 increased=>bit 2 switched*/
+				"	move.w	-(%1),-(%0) ; subqw  #2,%2 ; jra 2f\n"
+				"1:	lsr.l	#1,%3 ; jcc 2f\n"
+				"	move.w	-(%1),-(%0) ; subqw  #2,%2\n"
+				"2:	move.w	%2,%-; lsr.l #2,%2 ; jeq 6f\n"
+				"	lsr.l	#1,%2 ; jcc 3f ; move.l -(%1),-(%0)\n"
+				"3:	lsr.l	#1,%2 ; jcc 4f ; move.l -(%1),-(%0) ; move.l -(%1),-(%0)\n"
+				"4:	subq.l	#1,%2 ; jcs 6f\n"
+				"5:	move.l	-(%1),-(%0); move.l -(%1),-(%0)\n"
+				"	move.l	-(%1),-(%0); move.l -(%1),-(%0)\n"
+				"	dbra	%2,5b ; clr.w %2; subq.l #1,%2; jcc 5b\n"
+				"6:	move.w	%+,%2; btst #1,%2 ; jeq 7f ; move.w -(%1),-(%0)\n"
+				"7:	btst	#0,%2 ; jeq 8f ; move.b -(%1),-(%0)\n"
+				"8:"
+				: "=a" (d), "=a" (s), "=d" (count), "=d" (tmp)
+				: "0" ((char *) d + count), "1" ((char *) s + count), "2" (count));
+		}
+	}
+
+	return 0;
+}
+
+
+/* ++andreas: Simple and fast version of memmove, assumes size is
+   divisible by 16, suitable for moving the whole screen bitplane */
+static inline void fast_memmove(char *dst, const char *src, size_t size)
+{
+	if (!size)
+		return;
+	if (dst < src)
+		asm volatile ("\n"
+			"1:	movem.l	(%0)+,%%d0/%%d1/%%a0/%%a1\n"
+			"	movem.l	%%d0/%%d1/%%a0/%%a1,%1@\n"
+			"	addq.l	#8,%1; addq.l #8,%1\n"
+			"	dbra	%2,1b\n"
+			"	clr.w	%2; subq.l #1,%2\n"
+			"	jcc	1b"
+			: "=a" (src), "=a" (dst), "=d" (size)
+			: "0" (src), "1" (dst), "2" (size / 16 - 1)
+			: "d0", "d1", "a0", "a1", "memory");
+	else
+		asm volatile ("\n"
+			"1:	subq.l	#8,%0; subq.l #8,%0\n"
+			"	movem.l	%0@,%%d0/%%d1/%%a0/%%a1\n"
+			"	movem.l	%%d0/%%d1/%%a0/%%a1,-(%1)\n"
+			"	dbra	%2,1b\n"
+			"	clr.w	%2; subq.l #1,%2\n"
+			"	jcc 1b"
+			: "=a" (src), "=a" (dst), "=d" (size)
+			: "0" (src + size), "1" (dst + size), "2" (size / 16 - 1)
+			: "d0", "d1", "a0", "a1", "memory");
+}
+
+#ifdef BPL
+
+/*
+ * This expands a up to 8 bit color into two longs
+ * for movel operations.
+ */
+static const u32 four2long[] = {
+	0x00000000, 0x000000ff, 0x0000ff00, 0x0000ffff,
+	0x00ff0000, 0x00ff00ff, 0x00ffff00, 0x00ffffff,
+	0xff000000, 0xff0000ff, 0xff00ff00, 0xff00ffff,
+	0xffff0000, 0xffff00ff, 0xffffff00, 0xffffffff,
+};
+
+static inline void expand8_col2mask(u8 c, u32 m[])
+{
+	m[0] = four2long[c & 15];
+#if BPL > 4
+	m[1] = four2long[c >> 4];
+#endif
+}
+
+static inline void expand8_2col2mask(u8 fg, u8 bg, u32 fgm[], u32 bgm[])
+{
+	fgm[0] = four2long[fg & 15] ^ (bgm[0] = four2long[bg & 15]);
+#if BPL > 4
+	fgm[1] = four2long[fg >> 4] ^ (bgm[1] = four2long[bg >> 4]);
+#endif
+}
+
+/*
+ * set an 8bit value to a color
+ */
+static inline void fill8_col(u8 *dst, u32 m[])
+{
+	u32 tmp = m[0];
+	dst[0] = tmp;
+	dst[2] = (tmp >>= 8);
+#if BPL > 2
+	dst[4] = (tmp >>= 8);
+	dst[6] = tmp >> 8;
+#endif
+#if BPL > 4
+	tmp = m[1];
+	dst[8] = tmp;
+	dst[10] = (tmp >>= 8);
+	dst[12] = (tmp >>= 8);
+	dst[14] = tmp >> 8;
+#endif
+}
+
+/*
+ * set an 8bit value according to foreground/background color
+ */
+static inline void fill8_2col(u8 *dst, u8 fg, u8 bg, u32 mask)
+{
+	u32 fgm[2], bgm[2], tmp;
+
+	expand8_2col2mask(fg, bg, fgm, bgm);
+
+	mask |= mask << 8;
+#if BPL > 2
+	mask |= mask << 16;
+#endif
+	tmp = (mask & fgm[0]) ^ bgm[0];
+	dst[0] = tmp;
+	dst[2] = (tmp >>= 8);
+#if BPL > 2
+	dst[4] = (tmp >>= 8);
+	dst[6] = tmp >> 8;
+#endif
+#if BPL > 4
+	tmp = (mask & fgm[1]) ^ bgm[1];
+	dst[8] = tmp;
+	dst[10] = (tmp >>= 8);
+	dst[12] = (tmp >>= 8);
+	dst[14] = tmp >> 8;
+#endif
+}
+
+static const u32 two2word[] = {
+	0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
+};
+
+static inline void expand16_col2mask(u8 c, u32 m[])
+{
+	m[0] = two2word[c & 3];
+#if BPL > 2
+	m[1] = two2word[(c >> 2) & 3];
+#endif
+#if BPL > 4
+	m[2] = two2word[(c >> 4) & 3];
+	m[3] = two2word[c >> 6];
+#endif
+}
+
+static inline void expand16_2col2mask(u8 fg, u8 bg, u32 fgm[], u32 bgm[])
+{
+	bgm[0] = two2word[bg & 3];
+	fgm[0] = two2word[fg & 3] ^ bgm[0];
+#if BPL > 2
+	bgm[1] = two2word[(bg >> 2) & 3];
+	fgm[1] = two2word[(fg >> 2) & 3] ^ bgm[1];
+#endif
+#if BPL > 4
+	bgm[2] = two2word[(bg >> 4) & 3];
+	fgm[2] = two2word[(fg >> 4) & 3] ^ bgm[2];
+	bgm[3] = two2word[bg >> 6];
+	fgm[3] = two2word[fg >> 6] ^ bgm[3];
+#endif
+}
+
+static inline u32 *fill16_col(u32 *dst, int rows, u32 m[])
+{
+	while (rows) {
+		*dst++ = m[0];
+#if BPL > 2
+		*dst++ = m[1];
+#endif
+#if BPL > 4
+		*dst++ = m[2];
+		*dst++ = m[3];
+#endif
+		rows--;
+	}
+	return dst;
+}
+
+static inline void memmove32_col(void *dst, void *src, u32 mask, u32 h, u32 bytes)
+{
+	u32 *s, *d, v;
+
+        s = src;
+        d = dst;
+        do {
+                v = (*s++ & mask) | (*d  & ~mask);
+                *d++ = v;
+#if BPL > 2
+                v = (*s++ & mask) | (*d  & ~mask);
+                *d++ = v;
+#endif
+#if BPL > 4
+                v = (*s++ & mask) | (*d  & ~mask);
+                *d++ = v;
+                v = (*s++ & mask) | (*d  & ~mask);
+                *d++ = v;
+#endif
+                d = (u32 *)((u8 *)d + bytes);
+                s = (u32 *)((u8 *)s + bytes);
+        } while (--h);
+}
+
+#endif
+
+#endif /* _VIDEO_ATAFB_UTILS_H */