Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: (24 commits)
  m68k: Define sigcontext ABI of ColdFire
  m68knommu: NPTL support for uClinux
  m68k: Add NPTL support
  m68k: Eliminate unused variable in page_to_phys()
  m68k: Switch to generic siginfo layout
  macfb: fix 24-bit visual and stuff
  macfb: cleanup
  fbdev: add some missing mac modes
  mac68k: start CUDA early
  valkyriefb: various fixes
  fbdev: mac_var_to_mode() fix
  mac68k: move macsonic and macmace platform devices
  mac68k: move mac_esp platform device
  mac68k: replace mac68k SCC code with platform device
  pmac-zilog: add platform driver
  pmac-zilog: cleanup
  mac68k: rework SWIM platform device
  mac68k: cleanup
  ataflop: Killl warning about unused variable flags
  m68k: Use DIV_ROUND_CLOSEST
  ...

4 files changed, 406 insertions, 447 deletions

diff --git a/drivers/video/macfb.c b/drivers/video/macfb.c
index d66887e..43207cc 100644
--- a/drivers/video/macfb.c
+++ b/drivers/video/macfb.c
@@ -1,29 +1,33 @@
-/* macfb.c: Generic framebuffer for Macs whose colourmaps/modes we
-   don't know how to set */
-
-/* (c) 1999 David Huggins-Daines <dhd@debian.org>
-
-   Primarily based on vesafb.c, by Gerd Knorr
-   (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
-
-   Also uses information and code from:
-   
-   The original macfb.c from Linux/mac68k 2.0, by Alan Cox, Juergen
-   Mellinger, Mikael Forselius, Michael Schmitz, and others.
-
-   valkyriefb.c, by Martin Costabel, Kevin Schoedel, Barry Nathan, Dan
-   Jacobowitz, Paul Mackerras, Fabio Riccardi, and Geert Uytterhoeven.
-   
-   This code is free software.  You may copy, modify, and distribute
-   it subject to the terms and conditions of the GNU General Public
-   License, version 2, or any later version, at your convenience. */
+/*
+ * macfb.c: Generic framebuffer for Macs whose colourmaps/modes we
+ * don't know how to set.
+ *
+ * (c) 1999 David Huggins-Daines <dhd@debian.org>
+ *
+ * Primarily based on vesafb.c, by Gerd Knorr
+ * (c) 1998 Gerd Knorr <kraxel@cs.tu-berlin.de>
+ *
+ * Also uses information and code from:
+ *
+ * The original macfb.c from Linux/mac68k 2.0, by Alan Cox, Juergen
+ * Mellinger, Mikael Forselius, Michael Schmitz, and others.
+ *
+ * valkyriefb.c, by Martin Costabel, Kevin Schoedel, Barry Nathan, Dan
+ * Jacobowitz, Paul Mackerras, Fabio Riccardi, and Geert Uytterhoeven.
+ *
+ * The VideoToolbox "Bugs" web page at
+ * http://rajsky.psych.nyu.edu/Tips/VideoBugs.html
+ *
+ * This code is free software.  You may copy, modify, and distribute
+ * it subject to the terms and conditions of the GNU General Public
+ * License, version 2, or any later version, at your convenience.
+ */
 
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/mm.h>
-#include <linux/slab.h>
 #include <linux/delay.h>
 #include <linux/nubus.h>
 #include <linux/init.h>
@@ -31,9 +35,6 @@
 
 #include <asm/setup.h>
 #include <asm/bootinfo.h>
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-#include <asm/irq.h>
 #include <asm/macintosh.h>
 #include <asm/io.h>
 
@@ -44,7 +45,7 @@
 #define DAFB_BASE 0xf9800200
 
 /* Address for the built-in Civic framebuffer in Quadra AVs */
-#define CIVIC_BASE 0x50f30800	/* Only tested on 660AV! */
+#define CIVIC_BASE 0x50f30800
 
 /* GSC (Gray Scale Controller) base address */
 #define GSC_BASE 0x50F20000
@@ -52,37 +53,9 @@
 /* CSC (Color Screen Controller) base address */
 #define CSC_BASE 0x50F20000
 
-static int (*macfb_setpalette) (unsigned int regno, unsigned int red,
-				unsigned int green, unsigned int blue,
-				struct fb_info *info) = NULL;
-static int valkyrie_setpalette (unsigned int regno, unsigned int red,
-				unsigned int green, unsigned int blue,
-				struct fb_info *info);
-static int dafb_setpalette (unsigned int regno, unsigned int red,
-			    unsigned int green, unsigned int blue,
-			    struct fb_info *fb_info);
-static int rbv_setpalette (unsigned int regno, unsigned int red,
-			   unsigned int green, unsigned int blue,
-			   struct fb_info *fb_info);
-static int mdc_setpalette (unsigned int regno, unsigned int red,
-			   unsigned int green, unsigned int blue,
-			   struct fb_info *fb_info);
-static int toby_setpalette (unsigned int regno, unsigned int red,
-			    unsigned int green, unsigned int blue,
-			    struct fb_info *fb_info);
-static int civic_setpalette (unsigned int regno, unsigned int red,
-			     unsigned int green, unsigned int blue,
-			     struct fb_info *fb_info);
-static int csc_setpalette (unsigned int regno, unsigned int red,
-			   unsigned int green, unsigned int blue,
-			   struct fb_info *fb_info);
-
-static struct {
-	unsigned char addr;
-	/* Note: word-aligned */
-	char pad[3];
-	unsigned char lut;
-} __iomem *valkyrie_cmap_regs;
+static int (*macfb_setpalette)(unsigned int regno, unsigned int red,
+			       unsigned int green, unsigned int blue,
+			       struct fb_info *info);
 
 static struct {
 	unsigned char addr;
@@ -116,15 +89,15 @@ static struct {
 } __iomem *civic_cmap_regs;
 
 static struct {
-	char    pad1[0x40];
-        unsigned char	clut_waddr;	/* 0x40 */
-        char    pad2;
-        unsigned char	clut_data;	/* 0x42 */
-        char	pad3[0x3];
-        unsigned char	clut_raddr;	/* 0x46 */
+	char pad1[0x40];
+	unsigned char clut_waddr;	/* 0x40 */
+	char pad2;
+	unsigned char clut_data;	/* 0x42 */
+	char pad3[0x3];
+	unsigned char clut_raddr;	/* 0x46 */
 } __iomem *csc_cmap_regs;
 
-/* We will leave these the way they are for the time being */
+/* The registers in these structs are in NuBus slot space */
 struct mdc_cmap_regs {
 	char pad1[0x200200];
 	unsigned char addr;
@@ -145,13 +118,10 @@ struct jet_cmap_regs {
 	unsigned char lut;
 };
 
-#define PIXEL_TO_MM(a)	(((a)*10)/28)	/* width in mm at 72 dpi */	
-
-/* mode */
-static int  video_slot = 0;
+#define PIXEL_TO_MM(a)	(((a)*10)/28)	/* width in mm at 72 dpi */
 
 static struct fb_var_screeninfo macfb_defined = {
-	.bits_per_pixel	= 8,	
+	.bits_per_pixel	= 8,
 	.activate	= FB_ACTIVATE_NOW,
 	.width		= -1,
 	.height		= -1,
@@ -167,181 +137,152 @@ static struct fb_fix_screeninfo macfb_fix = {
 	.accel	= FB_ACCEL_NONE,
 };
 
+static void *slot_addr;
 static struct fb_info fb_info;
 static u32 pseudo_palette[16];
-static int inverse   = 0;
-static int vidtest   = 0;
+static int inverse;
+static int vidtest;
 
-static int valkyrie_setpalette (unsigned int regno, unsigned int red,
-				unsigned int green, unsigned int blue,
-				struct fb_info *info)
-{
-	unsigned long flags;
-	
-	red >>= 8;
-	green >>= 8;
-	blue >>= 8;
-
-	local_irq_save(flags);
-	
-	/* tell clut which address to fill */
-	nubus_writeb(regno, &valkyrie_cmap_regs->addr);
-	nop();
-
-	/* send one color channel at a time */
-	nubus_writeb(red, &valkyrie_cmap_regs->lut);
-	nop();
-	nubus_writeb(green, &valkyrie_cmap_regs->lut);
-	nop();
-	nubus_writeb(blue, &valkyrie_cmap_regs->lut);
-
-	local_irq_restore(flags);
-	return 0;
-}
-
-/* Unlike the Valkyrie, the DAFB cannot set individual colormap
-   registers.  Therefore, we do what the MacOS driver does (no
-   kidding!) and simply set them one by one until we hit the one we
-   want. */
-static int dafb_setpalette (unsigned int regno, unsigned int red,
-			    unsigned int green, unsigned int blue,
-			    struct fb_info *info)
+/*
+ * Unlike the Valkyrie, the DAFB cannot set individual colormap
+ * registers.  Therefore, we do what the MacOS driver does (no
+ * kidding!) and simply set them one by one until we hit the one we
+ * want.
+ */
+static int dafb_setpalette(unsigned int regno, unsigned int red,
+			   unsigned int green, unsigned int blue,
+			   struct fb_info *info)
 {
-	/* FIXME: really, really need to use ioremap() here,
-           phys_to_virt() doesn't work anymore */
 	static int lastreg = -1;
 	unsigned long flags;
-	
-	red >>= 8;
-	green >>= 8;
-	blue >>= 8;
 
 	local_irq_save(flags);
-	
-	/* fbdev will set an entire colourmap, but X won't.  Hopefully
-	   this should accommodate both of them */
-	if (regno != lastreg+1) {
+
+	/*
+	 * fbdev will set an entire colourmap, but X won't.  Hopefully
+	 * this should accommodate both of them
+	 */
+	if (regno != lastreg + 1) {
 		int i;
-		
+
 		/* Stab in the dark trying to reset the CLUT pointer */
 		nubus_writel(0, &dafb_cmap_regs->reset);
 		nop();
-		
+
 		/* Loop until we get to the register we want */
 		for (i = 0; i < regno; i++) {
-			nubus_writeb(info->cmap.red[i] >> 8, &dafb_cmap_regs->lut);
+			nubus_writeb(info->cmap.red[i] >> 8,
+				     &dafb_cmap_regs->lut);
 			nop();
-			nubus_writeb(info->cmap.green[i] >> 8, &dafb_cmap_regs->lut);
+			nubus_writeb(info->cmap.green[i] >> 8,
+				     &dafb_cmap_regs->lut);
 			nop();
-			nubus_writeb(info->cmap.blue[i] >> 8, &dafb_cmap_regs->lut);
+			nubus_writeb(info->cmap.blue[i] >> 8,
+				     &dafb_cmap_regs->lut);
 			nop();
 		}
 	}
-		
+
 	nubus_writeb(red, &dafb_cmap_regs->lut);
 	nop();
 	nubus_writeb(green, &dafb_cmap_regs->lut);
 	nop();
 	nubus_writeb(blue, &dafb_cmap_regs->lut);
-	
+
 	local_irq_restore(flags);
 	lastreg = regno;
 	return 0;
 }
 
 /* V8 and Brazil seem to use the same DAC.  Sonora does as well. */
-static int v8_brazil_setpalette (unsigned int regno, unsigned int red,
-				 unsigned int green, unsigned int blue,
-				 struct fb_info *info)	
+static int v8_brazil_setpalette(unsigned int regno, unsigned int red,
+				unsigned int green, unsigned int blue,
+				struct fb_info *info)
 {
 	unsigned int bpp = info->var.bits_per_pixel;
-	unsigned char _red  =red>>8;
-	unsigned char _green=green>>8;
-	unsigned char _blue =blue>>8;
-	unsigned char _regno;
 	unsigned long flags;
 
-	if (bpp > 8) return 1; /* failsafe */
+	if (bpp > 8)
+		return 1; /* failsafe */
 
 	local_irq_save(flags);
 
 	/* On these chips, the CLUT register numbers are spread out
-	   across the register space.  Thus:
-
-	   In 8bpp, all regnos are valid.
-	   
-	   In 4bpp, the regnos are 0x0f, 0x1f, 0x2f, etc, etc
-	   
-	   In 2bpp, the regnos are 0x3f, 0x7f, 0xbf, 0xff */
-  	_regno = (regno << (8 - bpp)) | (0xFF >> bpp);
-	nubus_writeb(_regno, &v8_brazil_cmap_regs->addr); nop();
+	 * across the register space.  Thus:
+	 * In 8bpp, all regnos are valid.
+	 * In 4bpp, the regnos are 0x0f, 0x1f, 0x2f, etc, etc
+	 * In 2bpp, the regnos are 0x3f, 0x7f, 0xbf, 0xff
+	 */
+	regno = (regno << (8 - bpp)) | (0xFF >> bpp);
+	nubus_writeb(regno, &v8_brazil_cmap_regs->addr);
+	nop();
 
 	/* send one color channel at a time */
-	nubus_writeb(_red, &v8_brazil_cmap_regs->lut); nop();
-	nubus_writeb(_green, &v8_brazil_cmap_regs->lut); nop();
-	nubus_writeb(_blue, &v8_brazil_cmap_regs->lut);
+	nubus_writeb(red, &v8_brazil_cmap_regs->lut);
+	nop();
+	nubus_writeb(green, &v8_brazil_cmap_regs->lut);
+	nop();
+	nubus_writeb(blue, &v8_brazil_cmap_regs->lut);
 
-	local_irq_restore(flags);	
+	local_irq_restore(flags);
 	return 0;
 }
 
-static int rbv_setpalette (unsigned int regno, unsigned int red,
-			   unsigned int green, unsigned int blue,
-			   struct fb_info *info)
+/* RAM-Based Video */
+static int rbv_setpalette(unsigned int regno, unsigned int red,
+			  unsigned int green, unsigned int blue,
+			  struct fb_info *info)
 {
-	/* use MSBs */
-	unsigned char _red  =red>>8;
-	unsigned char _green=green>>8;
-	unsigned char _blue =blue>>8;
-	unsigned char _regno;
 	unsigned long flags;
 
-	if (info->var.bits_per_pixel > 8) return 1; /* failsafe */
+	if (info->var.bits_per_pixel > 8)
+		return 1; /* failsafe */
 
 	local_irq_save(flags);
-	
+
 	/* From the VideoToolbox driver.  Seems to be saying that
 	 * regno #254 and #255 are the important ones for 1-bit color,
 	 * regno #252-255 are the important ones for 2-bit color, etc.
 	 */
-	_regno = regno + (256-(1 << info->var.bits_per_pixel));
+	regno += 256 - (1 << info->var.bits_per_pixel);
 
 	/* reset clut? (VideoToolbox sez "not necessary") */
-	nubus_writeb(0xFF, &rbv_cmap_regs->cntl); nop();
-	
+	nubus_writeb(0xFF, &rbv_cmap_regs->cntl);
+	nop();
+
 	/* tell clut which address to use. */
-	nubus_writeb(_regno, &rbv_cmap_regs->addr); nop();
-	
+	nubus_writeb(regno, &rbv_cmap_regs->addr);
+	nop();
+
 	/* send one color channel at a time. */
-	nubus_writeb(_red,   &rbv_cmap_regs->lut); nop();
-	nubus_writeb(_green, &rbv_cmap_regs->lut); nop();
-	nubus_writeb(_blue,  &rbv_cmap_regs->lut);
-	
-	local_irq_restore(flags); /* done. */
+	nubus_writeb(red, &rbv_cmap_regs->lut);
+	nop();
+	nubus_writeb(green, &rbv_cmap_regs->lut);
+	nop();
+	nubus_writeb(blue, &rbv_cmap_regs->lut);
+
+	local_irq_restore(flags);
 	return 0;
 }
 
-/* Macintosh Display Card (8x24) */
+/* Macintosh Display Card (8*24) */
 static int mdc_setpalette(unsigned int regno, unsigned int red,
 			  unsigned int green, unsigned int blue,
 			  struct fb_info *info)
 {
-	volatile struct mdc_cmap_regs *cmap_regs =
-		nubus_slot_addr(video_slot);
-	/* use MSBs */
-	unsigned char _red  =red>>8;
-	unsigned char _green=green>>8;
-	unsigned char _blue =blue>>8;
-	unsigned char _regno=regno;
+	struct mdc_cmap_regs *cmap_regs = slot_addr;
 	unsigned long flags;
 
 	local_irq_save(flags);
-	
+
 	/* the nop's are there to order writes. */
-	nubus_writeb(_regno, &cmap_regs->addr); nop();
-	nubus_writeb(_red, &cmap_regs->lut);    nop();
-	nubus_writeb(_green, &cmap_regs->lut);  nop();
-	nubus_writeb(_blue, &cmap_regs->lut);
+	nubus_writeb(regno, &cmap_regs->addr);
+	nop();
+	nubus_writeb(red, &cmap_regs->lut);
+	nop();
+	nubus_writeb(green, &cmap_regs->lut);
+	nop();
+	nubus_writeb(blue, &cmap_regs->lut);
 
 	local_irq_restore(flags);
 	return 0;
@@ -350,24 +291,26 @@ static int mdc_setpalette(unsigned int regno, unsigned int red,
 /* Toby frame buffer */
 static int toby_setpalette(unsigned int regno, unsigned int red,
 			   unsigned int green, unsigned int blue,
-			   struct fb_info *info) 
+			   struct fb_info *info)
 {
-	volatile struct toby_cmap_regs *cmap_regs =
-		nubus_slot_addr(video_slot);
+	struct toby_cmap_regs *cmap_regs = slot_addr;
 	unsigned int bpp = info->var.bits_per_pixel;
-	/* use MSBs */
-	unsigned char _red  =~(red>>8);
-	unsigned char _green=~(green>>8);
-	unsigned char _blue =~(blue>>8);
-	unsigned char _regno = (regno << (8 - bpp)) | (0xFF >> bpp);
 	unsigned long flags;
 
+	red = ~red;
+	green = ~green;
+	blue = ~blue;
+	regno = (regno << (8 - bpp)) | (0xFF >> bpp);
+
 	local_irq_save(flags);
-		
-	nubus_writeb(_regno, &cmap_regs->addr); nop();
-	nubus_writeb(_red, &cmap_regs->lut);    nop();
-	nubus_writeb(_green, &cmap_regs->lut);  nop();
-	nubus_writeb(_blue, &cmap_regs->lut);
+
+	nubus_writeb(regno, &cmap_regs->addr);
+	nop();
+	nubus_writeb(red, &cmap_regs->lut);
+	nop();
+	nubus_writeb(green, &cmap_regs->lut);
+	nop();
+	nubus_writeb(blue, &cmap_regs->lut);
 
 	local_irq_restore(flags);
 	return 0;
@@ -378,20 +321,18 @@ static int jet_setpalette(unsigned int regno, unsigned int red,
 			  unsigned int green, unsigned int blue,
 			  struct fb_info *info)
 {
-	volatile struct jet_cmap_regs *cmap_regs =
-		nubus_slot_addr(video_slot);
-	/* use MSBs */
-	unsigned char _red   = (red>>8);
-	unsigned char _green = (green>>8);
-	unsigned char _blue  = (blue>>8);
+	struct jet_cmap_regs *cmap_regs = slot_addr;
 	unsigned long flags;
 
 	local_irq_save(flags);
-	
-	nubus_writeb(regno, &cmap_regs->addr); nop();
-	nubus_writeb(_red, &cmap_regs->lut); nop();
-	nubus_writeb(_green, &cmap_regs->lut); nop();
-	nubus_writeb(_blue, &cmap_regs->lut);
+
+	nubus_writeb(regno, &cmap_regs->addr);
+	nop();
+	nubus_writeb(red, &cmap_regs->lut);
+	nop();
+	nubus_writeb(green, &cmap_regs->lut);
+	nop();
+	nubus_writeb(blue, &cmap_regs->lut);
 
 	local_irq_restore(flags);
 	return 0;
@@ -400,53 +341,27 @@ static int jet_setpalette(unsigned int regno, unsigned int red,
 /*
  * Civic framebuffer -- Quadra AV built-in video.  A chip
  * called Sebastian holds the actual color palettes, and
- * apparently, there are two different banks of 512K RAM 
+ * apparently, there are two different banks of 512K RAM
  * which can act as separate framebuffers for doing video
  * input and viewing the screen at the same time!  The 840AV
- * Can add another 1MB RAM to give the two framebuffers 
+ * Can add another 1MB RAM to give the two framebuffers
  * 1MB RAM apiece.
- *
- * FIXME: this doesn't seem to work anymore.
  */
-static int civic_setpalette (unsigned int regno, unsigned int red,
-			     unsigned int green, unsigned int blue,
-			     struct fb_info *info)
+static int civic_setpalette(unsigned int regno, unsigned int red,
+			    unsigned int green, unsigned int blue,
+			    struct fb_info *info)
 {
-	static int lastreg = -1;
 	unsigned long flags;
 	int clut_status;
 	
-	if (info->var.bits_per_pixel > 8) return 1; /* failsafe */
-
-	red   >>= 8;
-	green >>= 8;
-	blue  >>= 8;
+	if (info->var.bits_per_pixel > 8)
+		return 1; /* failsafe */
 
 	local_irq_save(flags);
-	
-	/*
-	 * Set the register address
-	 */
-	nubus_writeb(regno, &civic_cmap_regs->addr); nop();
 
-	/*
-	 * Wait for VBL interrupt here;
-	 * They're usually not enabled from Penguin, so we won't check
-	 */
-#if 0
-	{
-#define CIVIC_VBL_OFFSET	0x120
-		volatile unsigned long *vbl = nubus_readl(civic_cmap_regs->vbl_addr + CIVIC_VBL_OFFSET);
-		/* do interrupt setup stuff here? */
-		*vbl = 0L; nop();	/* clear */
-		*vbl = 1L; nop();	/* set */
-		while (*vbl != 0L)	/* wait for next vbl */
-		{
-			usleep(10);	/* needed? */
-		}
-		/* do interrupt shutdown stuff here? */
-	}
-#endif
+	/* Set the register address */
+	nubus_writeb(regno, &civic_cmap_regs->addr);
+	nop();
 
 	/*
 	 * Grab a status word and do some checking;
@@ -459,39 +374,52 @@ static int civic_setpalette (unsigned int regno, unsigned int red,
 #if 0
 		if ((clut_status & 0x000D) != 0)
 		{
-			nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
-			nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
+			nubus_writeb(0x00, &civic_cmap_regs->lut);
+			nop();
+			nubus_writeb(0x00, &civic_cmap_regs->lut);
+			nop();
 		}
 #endif
 
-		nubus_writeb(  red, &civic_cmap_regs->lut); nop();
-		nubus_writeb(green, &civic_cmap_regs->lut); nop();
-		nubus_writeb( blue, &civic_cmap_regs->lut); nop();
-		nubus_writeb( 0x00, &civic_cmap_regs->lut); nop();
+		nubus_writeb(red, &civic_cmap_regs->lut);
+		nop();
+		nubus_writeb(green, &civic_cmap_regs->lut);
+		nop();
+		nubus_writeb(blue, &civic_cmap_regs->lut);
+		nop();
+		nubus_writeb(0x00, &civic_cmap_regs->lut);
 	}
 	else
 	{
 		unsigned char junk;
 
-		junk = nubus_readb(&civic_cmap_regs->lut); nop();
-		junk = nubus_readb(&civic_cmap_regs->lut); nop();
-		junk = nubus_readb(&civic_cmap_regs->lut); nop();
-		junk = nubus_readb(&civic_cmap_regs->lut); nop();
+		junk = nubus_readb(&civic_cmap_regs->lut);
+		nop();
+		junk = nubus_readb(&civic_cmap_regs->lut);
+		nop();
+		junk = nubus_readb(&civic_cmap_regs->lut);
+		nop();
+		junk = nubus_readb(&civic_cmap_regs->lut);
+		nop();
 
 		if ((clut_status & 0x000D) != 0)
 		{
-			nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
-			nubus_writeb(0x00, &civic_cmap_regs->lut); nop();
+			nubus_writeb(0x00, &civic_cmap_regs->lut);
+			nop();
+			nubus_writeb(0x00, &civic_cmap_regs->lut);
+			nop();
 		}
 
-		nubus_writeb(  red, &civic_cmap_regs->lut); nop();
-		nubus_writeb(green, &civic_cmap_regs->lut); nop();
-		nubus_writeb( blue, &civic_cmap_regs->lut); nop();
-		nubus_writeb( junk, &civic_cmap_regs->lut); nop();
+		nubus_writeb(red, &civic_cmap_regs->lut);
+		nop();
+		nubus_writeb(green, &civic_cmap_regs->lut);
+		nop();
+		nubus_writeb(blue, &civic_cmap_regs->lut);
+		nop();
+		nubus_writeb(junk, &civic_cmap_regs->lut);
 	}
 
 	local_irq_restore(flags);
-	lastreg = regno;
 	return 0;
 }
 
@@ -500,16 +428,21 @@ static int civic_setpalette (unsigned int regno, unsigned int red,
  * (and the 5300 too, but that's a PowerMac). This function
  * brought to you in part by the ECSC driver for MkLinux.
  */
-
-static int csc_setpalette (unsigned int regno, unsigned int red,
-			   unsigned int green, unsigned int blue,
-			   struct fb_info *info)
+static int csc_setpalette(unsigned int regno, unsigned int red,
+			  unsigned int green, unsigned int blue,
+			  struct fb_info *info)
 {
-	mdelay(1);
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	udelay(1); /* mklinux on PB 5300 waits for 260 ns */
 	nubus_writeb(regno, &csc_cmap_regs->clut_waddr);
-	nubus_writeb(red,   &csc_cmap_regs->clut_data);
+	nubus_writeb(red, &csc_cmap_regs->clut_data);
 	nubus_writeb(green, &csc_cmap_regs->clut_data);
-	nubus_writeb(blue,  &csc_cmap_regs->clut_data);
+	nubus_writeb(blue, &csc_cmap_regs->clut_data);
+
+	local_irq_restore(flags);
 	return 0;
 }
 
@@ -518,10 +451,10 @@ static int macfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 			   struct fb_info *fb_info)
 {
 	/*
-	 *  Set a single color register. The values supplied are
-	 *  already rounded down to the hardware's capabilities
-	 *  (according to the entries in the `var' structure). Return
-	 *  != 0 for invalid regno.
+	 * Set a single color register. The values supplied are
+	 * already rounded down to the hardware's capabilities
+	 * (according to the entries in the `var' structure).
+	 * Return non-zero for invalid regno.
 	 */
 	
 	if (regno >= fb_info->cmap.len)
@@ -536,8 +469,8 @@ static int macfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 		case 4:
 		case 8:
 			if (macfb_setpalette)
-				macfb_setpalette(regno, red, green, blue,
-						 fb_info);
+				macfb_setpalette(regno, red >> 8, green >> 8,
+						 blue >> 8, fb_info);
 			else
 				return 1;
 			break;
@@ -555,28 +488,22 @@ static int macfb_setcolreg(unsigned regno, unsigned red, unsigned green,
 			} else {
 				/* 0:5:6:5 */
 				((u32*) (fb_info->pseudo_palette))[regno] =
-					((red   & 0xf800)      ) |
+					((red   & 0xf800) >>  0) |
 					((green & 0xfc00) >>  5) |
 					((blue  & 0xf800) >> 11);
 			}
 			break;
-			/* I'm pretty sure that one or the other of these
-			   doesn't exist on 68k Macs */
+		/*
+		 * 24-bit colour almost doesn't exist on 68k Macs --
+		 * http://support.apple.com/kb/TA28634 (Old Article: 10992)
+		 */
 		case 24:
-			red   >>= 8;
-			green >>= 8;
-			blue  >>= 8;
-			((u32 *)(fb_info->pseudo_palette))[regno] =
-				(red   << fb_info->var.red.offset)   |
-				(green << fb_info->var.green.offset) |
-				(blue  << fb_info->var.blue.offset);
-			break;
 		case 32:
 			red   >>= 8;
 			green >>= 8;
 			blue  >>= 8;
 			((u32 *)(fb_info->pseudo_palette))[regno] =
-				(red   << fb_info->var.red.offset)   |
+				(red   << fb_info->var.red.offset) |
 				(green << fb_info->var.green.offset) |
 				(blue  << fb_info->var.blue.offset);
 			break;
@@ -597,25 +524,24 @@ static struct fb_ops macfb_ops = {
 static void __init macfb_setup(char *options)
 {
 	char *this_opt;
-	
+
 	if (!options || !*options)
 		return;
-	
+
 	while ((this_opt = strsep(&options, ",")) != NULL) {
-		if (!*this_opt) continue;
-		
-		if (! strcmp(this_opt, "inverse"))
-			inverse=1;
-		/* This means "turn on experimental CLUT code" */
-		else if (!strcmp(this_opt, "vidtest"))
-			vidtest=1;
+		if (!*this_opt)
+			continue;
+
+		if (!strcmp(this_opt, "inverse"))
+			inverse = 1;
+		else
+			if (!strcmp(this_opt, "vidtest"))
+				vidtest = 1; /* enable experimental CLUT code */
 	}
 }
 
 static void __init iounmap_macfb(void)
 {
-	if (valkyrie_cmap_regs)
-		iounmap(valkyrie_cmap_regs);
 	if (dafb_cmap_regs)
 		iounmap(dafb_cmap_regs);
 	if (v8_brazil_cmap_regs)
@@ -642,48 +568,55 @@ static int __init macfb_init(void)
 	if (!MACH_IS_MAC) 
 		return -ENODEV;
 
-	/* There can only be one internal video controller anyway so
-	   we're not too worried about this */
+	if (mac_bi_data.id == MAC_MODEL_Q630 ||
+	    mac_bi_data.id == MAC_MODEL_P588)
+		return -ENODEV; /* See valkyriefb.c */
+
 	macfb_defined.xres = mac_bi_data.dimensions & 0xFFFF;
 	macfb_defined.yres = mac_bi_data.dimensions >> 16;
 	macfb_defined.bits_per_pixel = mac_bi_data.videodepth;
+
 	macfb_fix.line_length = mac_bi_data.videorow;
-	macfb_fix.smem_len = macfb_fix.line_length * macfb_defined.yres;
+	macfb_fix.smem_len    = macfb_fix.line_length * macfb_defined.yres;
 	/* Note: physical address (since 2.1.127) */
-	macfb_fix.smem_start = mac_bi_data.videoaddr;
-	/* This is actually redundant with the initial mappings.
-	   However, there are some non-obvious aspects to the way
-	   those mappings are set up, so this is in fact the safest
-	   way to ensure that this driver will work on every possible
-	   Mac */
-	fb_info.screen_base = ioremap(mac_bi_data.videoaddr, macfb_fix.smem_len);
-	
-	printk("macfb: framebuffer at 0x%08lx, mapped to 0x%p, size %dk\n",
-	       macfb_fix.smem_start, fb_info.screen_base, macfb_fix.smem_len/1024);
-	printk("macfb: mode is %dx%dx%d, linelength=%d\n",
-	       macfb_defined.xres, macfb_defined.yres, macfb_defined.bits_per_pixel, macfb_fix.line_length);
-	
+	macfb_fix.smem_start  = mac_bi_data.videoaddr;
+
 	/*
-	 *	Fill in the available video resolution
+	 * This is actually redundant with the initial mappings.
+	 * However, there are some non-obvious aspects to the way
+	 * those mappings are set up, so this is in fact the safest
+	 * way to ensure that this driver will work on every possible Mac
 	 */
-	 
-	macfb_defined.xres_virtual   = macfb_defined.xres;
-	macfb_defined.yres_virtual   = macfb_defined.yres;
-	macfb_defined.height = PIXEL_TO_MM(macfb_defined.yres);
-	macfb_defined.width  = PIXEL_TO_MM(macfb_defined.xres);	 
+	fb_info.screen_base = ioremap(mac_bi_data.videoaddr,
+				      macfb_fix.smem_len);
+	if (!fb_info.screen_base)
+		return -ENODEV;
 
-	printk("macfb: scrolling: redraw\n");
+	printk("macfb: framebuffer at 0x%08lx, mapped to 0x%p, size %dk\n",
+	       macfb_fix.smem_start, fb_info.screen_base,
+	       macfb_fix.smem_len / 1024);
+	printk("macfb: mode is %dx%dx%d, linelength=%d\n",
+	       macfb_defined.xres, macfb_defined.yres,
+	       macfb_defined.bits_per_pixel, macfb_fix.line_length);
+
+	/* Fill in the available video resolution */
+	macfb_defined.xres_virtual = macfb_defined.xres;
 	macfb_defined.yres_virtual = macfb_defined.yres;
+	macfb_defined.height       = PIXEL_TO_MM(macfb_defined.yres);
+	macfb_defined.width        = PIXEL_TO_MM(macfb_defined.xres);
 
-	/* some dummy values for timing to make fbset happy */
-	macfb_defined.pixclock     = 10000000 / macfb_defined.xres * 1000 / macfb_defined.yres;
+	/* Some dummy values for timing to make fbset happy */
+	macfb_defined.pixclock     = 10000000 / macfb_defined.xres *
+				     1000 / macfb_defined.yres;
 	macfb_defined.left_margin  = (macfb_defined.xres / 8) & 0xf8;
 	macfb_defined.hsync_len    = (macfb_defined.xres / 8) & 0xf8;
 
 	switch (macfb_defined.bits_per_pixel) {
 	case 1:
-		/* XXX: I think this will catch any program that tries
-		   to do FBIO_PUTCMAP when the visual is monochrome */
+		/*
+		 * XXX: I think this will catch any program that tries
+		 * to do FBIO_PUTCMAP when the visual is monochrome.
+		 */
 		macfb_defined.red.length = macfb_defined.bits_per_pixel;
 		macfb_defined.green.length = macfb_defined.bits_per_pixel;
 		macfb_defined.blue.length = macfb_defined.bits_per_pixel;
@@ -708,53 +641,52 @@ static int __init macfb_init(void)
 		macfb_defined.green.length = 5;
 		macfb_defined.blue.offset = 0;
 		macfb_defined.blue.length = 5;
-		printk("macfb: directcolor: "
-		       "size=1:5:5:5, shift=15:10:5:0\n");
 		video_cmap_len = 16;
-		/* Should actually be FB_VISUAL_DIRECTCOLOR, but this
-		   works too */
+		/*
+		 * Should actually be FB_VISUAL_DIRECTCOLOR, but this
+		 * works too
+		 */
 		macfb_fix.visual = FB_VISUAL_TRUECOLOR;
 		break;
 	case 24:
 	case 32:
-		/* XXX: have to test these... can any 68k Macs
-		   actually do this on internal video? */
 		macfb_defined.red.offset = 16;
 		macfb_defined.red.length = 8;
 		macfb_defined.green.offset = 8;
 		macfb_defined.green.length = 8;
 		macfb_defined.blue.offset = 0;
 		macfb_defined.blue.length = 8;
-		printk("macfb: truecolor: "
-		       "size=0:8:8:8, shift=0:16:8:0\n");
 		video_cmap_len = 16;
 		macfb_fix.visual = FB_VISUAL_TRUECOLOR;
+		break;
 	default:
 		video_cmap_len = 0;
 		macfb_fix.visual = FB_VISUAL_MONO01;
-		printk("macfb: unknown or unsupported bit depth: %d\n", macfb_defined.bits_per_pixel);
+		printk("macfb: unknown or unsupported bit depth: %d\n",
+		       macfb_defined.bits_per_pixel);
 		break;
 	}
 	
-	/* Hardware dependent stuff */
-	/*  We take a wild guess that if the video physical address is
-	 *  in nubus slot space, that the nubus card is driving video.
-	 *  Penguin really ought to tell us whether we are using internal
-	 *  video or not.
+	/*
+	 * We take a wild guess that if the video physical address is
+	 * in nubus slot space, that the nubus card is driving video.
+	 * Penguin really ought to tell us whether we are using internal
+	 * video or not.
+	 * Hopefully we only find one of them.  Otherwise our NuBus
+	 * code is really broken :-)
 	 */
-	/* Hopefully we only find one of them.  Otherwise our NuBus
-           code is really broken :-) */
 
-	while ((ndev = nubus_find_type(NUBUS_CAT_DISPLAY, NUBUS_TYPE_VIDEO, ndev))
-		!= NULL)
+	while ((ndev = nubus_find_type(NUBUS_CAT_DISPLAY,
+				       NUBUS_TYPE_VIDEO, ndev)))
 	{
-		if (!(mac_bi_data.videoaddr >= ndev->board->slot_addr
-		      && (mac_bi_data.videoaddr <
-			  (unsigned long)nubus_slot_addr(ndev->board->slot+1))))
+		unsigned long base = ndev->board->slot_addr;
+
+		if (mac_bi_data.videoaddr < base ||
+		    mac_bi_data.videoaddr - base > 0xFFFFFF)
 			continue;
+
 		video_is_nubus = 1;
-		/* We should probably just use the slot address... */
-		video_slot = ndev->board->slot;
+		slot_addr = (unsigned char *)base;
 
 		switch(ndev->dr_hw) {
 		case NUBUS_DRHW_APPLE_MDC:
@@ -771,7 +703,7 @@ static int __init macfb_init(void)
 			strcpy(macfb_fix.id, "Jet");
 			macfb_setpalette = jet_setpalette;
 			macfb_defined.activate = FB_ACTIVATE_NOW;
-			break;			
+			break;
 		default:
 			strcpy(macfb_fix.id, "Generic NuBus");
 			break;
@@ -779,30 +711,19 @@ static int __init macfb_init(void)
 	}
 
 	/* If it's not a NuBus card, it must be internal video */
-	/* FIXME: this function is getting way too big.  (this driver
-           is too...) */
 	if (!video_is_nubus)
-		switch( mac_bi_data.id )
-		{
-			/* Valkyrie Quadras */
-		case MAC_MODEL_Q630:
-			/* I'm not sure about this one */
-		case MAC_MODEL_P588:
-			strcpy(macfb_fix.id, "Valkyrie");
-			macfb_setpalette = valkyrie_setpalette;
-			macfb_defined.activate = FB_ACTIVATE_NOW;
-			valkyrie_cmap_regs = ioremap(DAC_BASE, 0x1000);
-			break;
-
-			/* DAFB Quadras */
-			/* Note: these first four have the v7 DAFB, which is
-			   known to be rather unlike the ones used in the
-			   other models */
+		switch (mac_bi_data.id) {
+		/*
+		 * DAFB Quadras
+		 * Note: these first four have the v7 DAFB, which is
+		 * known to be rather unlike the ones used in the
+		 * other models
+		 */
 		case MAC_MODEL_P475:
 		case MAC_MODEL_P475F:
 		case MAC_MODEL_P575:
 		case MAC_MODEL_Q605:
-	
+
 		case MAC_MODEL_Q800:
 		case MAC_MODEL_Q650:
 		case MAC_MODEL_Q610:
@@ -817,17 +738,21 @@ static int __init macfb_init(void)
 			dafb_cmap_regs = ioremap(DAFB_BASE, 0x1000);
 			break;
 
-			/* LC II uses the V8 framebuffer */
+		/*
+		 * LC II uses the V8 framebuffer
+		 */
 		case MAC_MODEL_LCII:
 			strcpy(macfb_fix.id, "V8");
 			macfb_setpalette = v8_brazil_setpalette;
 			macfb_defined.activate = FB_ACTIVATE_NOW;
 			v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000);
 			break;
-		
-			/* IIvi, IIvx use the "Brazil" framebuffer (which is
-			   very much like the V8, it seems, and probably uses
-			   the same DAC) */
+
+		/*
+		 * IIvi, IIvx use the "Brazil" framebuffer (which is
+		 * very much like the V8, it seems, and probably uses
+		 * the same DAC)
+		 */
 		case MAC_MODEL_IIVI:
 		case MAC_MODEL_IIVX:
 		case MAC_MODEL_P600:
@@ -836,12 +761,14 @@ static int __init macfb_init(void)
 			macfb_defined.activate = FB_ACTIVATE_NOW;
 			v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000);
 			break;
-		
-			/* LC III (and friends) use the Sonora framebuffer */
-			/* Incidentally this is also used in the non-AV models
-			   of the x100 PowerMacs */
-			/* These do in fact seem to use the same DAC interface
-			   as the LC II. */
+
+		/*
+		 * LC III (and friends) use the Sonora framebuffer
+		 * Incidentally this is also used in the non-AV models
+		 * of the x100 PowerMacs
+		 * These do in fact seem to use the same DAC interface
+		 * as the LC II.
+		 */
 		case MAC_MODEL_LCIII:
 		case MAC_MODEL_P520:
 		case MAC_MODEL_P550:
@@ -852,9 +779,11 @@ static int __init macfb_init(void)
 			v8_brazil_cmap_regs = ioremap(DAC_BASE, 0x1000);
 			break;
 
-			/* IIci and IIsi use the infamous RBV chip
-                           (the IIsi is just a rebadged and crippled
-                           IIci in a different case, BTW) */
+		/*
+		 * IIci and IIsi use the infamous RBV chip
+		 * (the IIsi is just a rebadged and crippled
+		 * IIci in a different case, BTW)
+		 */
 		case MAC_MODEL_IICI:
 		case MAC_MODEL_IISI:
 			macfb_setpalette = rbv_setpalette;
@@ -863,7 +792,9 @@ static int __init macfb_init(void)
 			rbv_cmap_regs = ioremap(DAC_BASE, 0x1000);
 			break;
 
-			/* AVs use the Civic framebuffer */
+		/*
+		 * AVs use the Civic framebuffer
+		 */
 		case MAC_MODEL_Q840:
 		case MAC_MODEL_C660:
 			macfb_setpalette = civic_setpalette;
@@ -873,15 +804,10 @@ static int __init macfb_init(void)
 			break;
 
 		
-			/* Write a setpalette function for your machine, then
-			   you can add something similar here.  These are
-			   grouped by classes of video chipsets.  Some of this
-			   information is from the VideoToolbox "Bugs" web
-			   page at
-			   http://rajsky.psych.nyu.edu/Tips/VideoBugs.html */
-
-			/* Assorted weirdos */
-			/* We think this may be like the LC II */
+		/*
+		 * Assorted weirdos
+		 * We think this may be like the LC II
+		 */
 		case MAC_MODEL_LC:
 			if (vidtest) {
 				macfb_setpalette = v8_brazil_setpalette;
@@ -891,7 +817,10 @@ static int __init macfb_init(void)
 			}
 			strcpy(macfb_fix.id, "LC");
 			break;
-			/* We think this may be like the LC II */
+
+		/*
+		 * We think this may be like the LC II
+		 */
 		case MAC_MODEL_CCL:
 			if (vidtest) {
 				macfb_setpalette = v8_brazil_setpalette;
@@ -902,31 +831,42 @@ static int __init macfb_init(void)
 			strcpy(macfb_fix.id, "Color Classic");
 			break;
 
-			/* And we *do* mean "weirdos" */
+		/*
+		 * And we *do* mean "weirdos"
+		 */
 		case MAC_MODEL_TV:
 			strcpy(macfb_fix.id, "Mac TV");
 			break;
 
-			/* These don't have colour, so no need to worry */
+		/*
+		 * These don't have colour, so no need to worry
+		 */
 		case MAC_MODEL_SE30:
 		case MAC_MODEL_CLII:
 			strcpy(macfb_fix.id, "Monochrome");
 			break;
 
-			/* Powerbooks are particularly difficult.  Many of
-			   them have separate framebuffers for external and
-			   internal video, which is admittedly pretty cool,
-			   but will be a bit of a headache to support here.
-			   Also, many of them are grayscale, and we don't
-			   really support that. */
-
+		/*
+		 * Powerbooks are particularly difficult.  Many of
+		 * them have separate framebuffers for external and
+		 * internal video, which is admittedly pretty cool,
+		 * but will be a bit of a headache to support here.
+		 * Also, many of them are grayscale, and we don't
+		 * really support that.
+		 */
+
+		/*
+		 * Slot 0 ROM says TIM. No external video. B&W.
+		 */
 		case MAC_MODEL_PB140:
 		case MAC_MODEL_PB145:
 		case MAC_MODEL_PB170:
 			strcpy(macfb_fix.id, "DDC");
 			break;
 
-			/* Internal is GSC, External (if present) is ViSC */
+		/*
+		 * Internal is GSC, External (if present) is ViSC
+		 */
 		case MAC_MODEL_PB150:	/* no external video */
 		case MAC_MODEL_PB160:
 		case MAC_MODEL_PB165:
@@ -936,13 +876,17 @@ static int __init macfb_init(void)
 			strcpy(macfb_fix.id, "GSC");
 			break;
 
-			/* Internal is TIM, External is ViSC */
+		/*
+		 * Internal is TIM, External is ViSC
+		 */
 		case MAC_MODEL_PB165C:
 		case MAC_MODEL_PB180C:
 			strcpy(macfb_fix.id, "TIM");
 			break;
 
-			/* Internal is CSC, External is Keystone+Ariel. */
+		/*
+		 * Internal is CSC, External is Keystone+Ariel.
+		 */
 		case MAC_MODEL_PB190:	/* external video is optional */
 		case MAC_MODEL_PB520:
 		case MAC_MODEL_PB250:
@@ -954,7 +898,7 @@ static int __init macfb_init(void)
 			strcpy(macfb_fix.id, "CSC");
 			csc_cmap_regs = ioremap(CSC_BASE, 0x1000);
 			break;
-		
+
 		default:
 			strcpy(macfb_fix.id, "Unknown");
 			break;
@@ -969,7 +913,7 @@ static int __init macfb_init(void)
 	err = fb_alloc_cmap(&fb_info.cmap, video_cmap_len, 0);
 	if (err)
 		goto fail_unmap;
-	
+
 	err = register_framebuffer(&fb_info);
 	if (err)
 		goto fail_dealloc;
diff --git a/drivers/video/macmodes.c b/drivers/video/macmodes.c
index 083f603..af86c08 100644
--- a/drivers/video/macmodes.c
+++ b/drivers/video/macmodes.c
@@ -33,6 +33,10 @@
 
 static const struct fb_videomode mac_modedb[] = {
     {
+	/* 512x384, 60Hz, Non-Interlaced (15.67 MHz dot clock) */
+	"mac2", 60, 512, 384, 63828, 80, 16, 19, 1, 32, 3,
+	0, FB_VMODE_NONINTERLACED
+    }, {
 	/* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
 	"mac5", 60, 640, 480, 39722, 32, 32, 33, 10, 96, 2,
 	0, FB_VMODE_NONINTERLACED
@@ -41,6 +45,10 @@ static const struct fb_videomode mac_modedb[] = {
 	"mac6", 67, 640, 480, 33334, 80, 80, 39, 3, 64, 3,
 	0, FB_VMODE_NONINTERLACED
     }, {
+	/* 640x870, 75Hz (portrait), Non-Interlaced (57.28 MHz dot clock) */
+	"mac7", 75, 640, 870, 17457, 80, 32, 42, 3, 80, 3,
+	0, FB_VMODE_NONINTERLACED
+    }, {
 	/* 800x600, 56 Hz, Non-Interlaced (36.00 MHz dotclock) */
 	"mac9", 56, 800, 600, 27778, 112, 40, 22, 1, 72, 2,
 	FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
@@ -105,10 +113,6 @@ static const struct fb_videomode mac_modedb[] = {
 	"mac1", 60, 512, 384, pixclock, left, right, upper, lower, hslen, vslen,
 	sync, FB_VMODE_INTERLACED
     }, {
-	/* VMODE_512_384_60: 512x384, 60Hz, Non-Interlaced */
-    	"mac2", 60, 512, 384, pixclock, left, right, upper, lower, hslen, vslen,
-	sync, FB_VMODE_NONINTERLACED
-    }, {
 	/* VMODE_640_480_50I: 640x480, 50Hz, Interlaced (PAL) */
 	"mac3", 50, 640, 480, pixclock, left, right, upper, lower, hslen, vslen,
 	sync, FB_VMODE_INTERLACED
@@ -117,10 +121,6 @@ static const struct fb_videomode mac_modedb[] = {
 	"mac4", 60, 640, 480, pixclock, left, right, upper, lower, hslen, vslen,
 	sync, FB_VMODE_INTERLACED
     }, {
-	/* VMODE_640_870_75P: 640x870, 75Hz (portrait), Non-Interlaced */
-	"mac7", 75, 640, 870, pixclock, left, right, upper, lower, hslen, vslen,
-	sync, FB_VMODE_NONINTERLACED
-    }, {
 	/* VMODE_768_576_50I: 768x576, 50Hz (PAL full frame), Interlaced */
 	"mac8", 50, 768, 576, pixclock, left, right, upper, lower, hslen, vslen,
 	sync, FB_VMODE_INTERLACED
@@ -134,38 +134,42 @@ static const struct fb_videomode mac_modedb[] = {
      *
      *  These MUST be ordered in
      *    - increasing resolution
-     *    - decreasing refresh rate
+     *    - decreasing pixel clock period
      */
 
 static const struct mode_map {
     int vmode;
     const struct fb_videomode *mode;
 } mac_modes[] = {
+    /* 512x384 */
+    { VMODE_512_384_60, &mac_modedb[0] },
     /* 640x480 */
-    { VMODE_640_480_67, &mac_modedb[1] },
-    { VMODE_640_480_60, &mac_modedb[0] },
+    { VMODE_640_480_60, &mac_modedb[1] },
+    { VMODE_640_480_67, &mac_modedb[2] },
+    /* 640x870 */
+    { VMODE_640_870_75P, &mac_modedb[3] },
     /* 800x600 */
-    { VMODE_800_600_75, &mac_modedb[5] },
-    { VMODE_800_600_72, &mac_modedb[4] },
-    { VMODE_800_600_60, &mac_modedb[3] },
-    { VMODE_800_600_56, &mac_modedb[2] },
+    { VMODE_800_600_56, &mac_modedb[4] },
+    { VMODE_800_600_60, &mac_modedb[5] },
+    { VMODE_800_600_75, &mac_modedb[7] },
+    { VMODE_800_600_72, &mac_modedb[6] },
     /* 832x624 */
-    { VMODE_832_624_75, &mac_modedb[6] },
+    { VMODE_832_624_75, &mac_modedb[8] },
     /* 1024x768 */
-    { VMODE_1024_768_75, &mac_modedb[10] },
-    { VMODE_1024_768_75V, &mac_modedb[9] },
-    { VMODE_1024_768_70, &mac_modedb[8] },
-    { VMODE_1024_768_60, &mac_modedb[7] },
+    { VMODE_1024_768_60, &mac_modedb[9] },
+    { VMODE_1024_768_70, &mac_modedb[10] },
+    { VMODE_1024_768_75V, &mac_modedb[11] },
+    { VMODE_1024_768_75, &mac_modedb[12] },
     /* 1152x768 */
-    { VMODE_1152_768_60, &mac_modedb[14] },
+    { VMODE_1152_768_60, &mac_modedb[16] },
     /* 1152x870 */
-    { VMODE_1152_870_75, &mac_modedb[11] },
+    { VMODE_1152_870_75, &mac_modedb[13] },
     /* 1280x960 */
-    { VMODE_1280_960_75, &mac_modedb[12] },
+    { VMODE_1280_960_75, &mac_modedb[14] },
     /* 1280x1024 */
-    { VMODE_1280_1024_75, &mac_modedb[13] },
+    { VMODE_1280_1024_75, &mac_modedb[15] },
     /* 1600x1024 */
-    { VMODE_1600_1024_60, &mac_modedb[15] },
+    { VMODE_1600_1024_60, &mac_modedb[17] },
     { -1, NULL }
 };
 
@@ -299,7 +303,6 @@ EXPORT_SYMBOL(mac_vmode_to_var);
 int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode,
 		     int *cmode)
 {
-    const struct fb_videomode *mode = NULL;
     const struct mode_map *map;
 
     if (var->bits_per_pixel <= 8)
@@ -311,8 +314,13 @@ int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode,
     else
 	return -EINVAL;
 
+    /*
+     * Find the mac_mode with a matching resolution or failing that, the
+     * closest larger resolution. Skip modes with a shorter pixel clock period.
+     */
     for (map = mac_modes; map->vmode != -1; map++) {
-	mode = map->mode;
+	const struct fb_videomode *mode = map->mode;
+
 	if (var->xres > mode->xres || var->yres > mode->yres)
 	    continue;
 	if (var->xres_virtual > mode->xres || var->yres_virtual > mode->yres)
@@ -322,6 +330,24 @@ int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode,
 	if ((var->vmode & FB_VMODE_MASK) != mode->vmode)
 	    continue;
 	*vmode = map->vmode;
+
+	/*
+	 * Having found a good resolution, find the matching pixel clock
+	 * or failing that, the closest longer pixel clock period.
+	 */
+	map++;
+	while (map->vmode != -1) {
+	    const struct fb_videomode *clk_mode = map->mode;
+
+	    if (mode->xres != clk_mode->xres || mode->yres != clk_mode->yres)
+		break;
+	    if (var->pixclock > mode->pixclock)
+	        break;
+	    if (mode->vmode != clk_mode->vmode)
+		continue;
+	    *vmode = map->vmode;
+	    map++;
+	}
 	return 0;
     }
     return -EINVAL;
diff --git a/drivers/video/valkyriefb.c b/drivers/video/valkyriefb.c
index 4bb9a0b..6b52bf6 100644
--- a/drivers/video/valkyriefb.c
+++ b/drivers/video/valkyriefb.c
@@ -69,7 +69,7 @@
 #ifdef CONFIG_MAC
 /* We don't yet have functions to read the PRAM... perhaps we can
    adapt them from the PPC code? */
-static int default_vmode = VMODE_640_480_67;
+static int default_vmode = VMODE_CHOOSE;
 static int default_cmode = CMODE_8;
 #else
 static int default_vmode = VMODE_NVRAM;
@@ -326,11 +326,11 @@ int __init valkyriefb_init(void)
 
 #ifdef CONFIG_MAC
 	if (!MACH_IS_MAC)
-		return 0;
+		return -ENODEV;
 	if (!(mac_bi_data.id == MAC_MODEL_Q630
 	      /* I'm not sure about this one */
 	    || mac_bi_data.id == MAC_MODEL_P588))
-		return 0;
+		return -ENODEV;
 
 	/* Hardcoded addresses... welcome to 68k Macintosh country :-) */
 	frame_buffer_phys = 0xf9000000;
diff --git a/drivers/video/valkyriefb.h b/drivers/video/valkyriefb.h
index 97aaf7b..d787441 100644
--- a/drivers/video/valkyriefb.h
+++ b/drivers/video/valkyriefb.h
@@ -134,15 +134,7 @@ static struct valkyrie_regvals valkyrie_reg_init_14 = {
     { 1024, 0 },
 	1024, 768
 };
-
-/* Register values for 800x600, 72Hz mode (11) */
-static struct valkyrie_regvals valkyrie_reg_init_11 = {
-    13,
-    { 17, 27, 3 },  /* pixel clock = 49.63MHz for V=71.66Hz */
-    { 800, 0 },
-	800, 600
-};
-#endif /* CONFIG_MAC */
+#endif /* !defined CONFIG_MAC */
 
 /* Register values for 832x624, 75Hz mode (13) */
 static struct valkyrie_regvals valkyrie_reg_init_13 = {
@@ -152,6 +144,14 @@ static struct valkyrie_regvals valkyrie_reg_init_13 = {
 	832, 624
 };
 
+/* Register values for 800x600, 72Hz mode (11) */
+static struct valkyrie_regvals valkyrie_reg_init_11 = {
+    13,
+    { 17, 27, 3 },  /* pixel clock = 49.63MHz for V=71.66Hz */
+    { 800, 0 },
+	800, 600
+};
+
 /* Register values for 800x600, 60Hz mode (10) */
 static struct valkyrie_regvals valkyrie_reg_init_10 = {
     12,
@@ -188,24 +188,13 @@ static struct valkyrie_regvals *valkyrie_reg_init[VMODE_MAX] = {
 	NULL,
 	NULL,
 	&valkyrie_reg_init_10,
-#ifdef CONFIG_MAC
-	NULL,
-	NULL,
-	&valkyrie_reg_init_13,
-	NULL,
-	NULL,
-	NULL,
-	NULL,
-#else
 	&valkyrie_reg_init_11,
 	NULL,
 	&valkyrie_reg_init_13,
+#ifndef CONFIG_MAC
 	&valkyrie_reg_init_14,
 	&valkyrie_reg_init_15,
 	NULL,
 	&valkyrie_reg_init_17,
 #endif
-	NULL,
-	NULL,
-	NULL
 };