Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 970 insertions, 0 deletions

diff --git a/drivers/video/macfb.c b/drivers/video/macfb.c
new file mode 100644
index 00000000000..4945a4c0220
--- /dev/null
+++ b/drivers/video/macfb.c
@@ -0,0 +1,970 @@
+/* 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. */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/tty.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/nubus.h>
+#include <linux/init.h>
+#include <linux/fb.h>
+
+#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>
+#include <asm/machw.h>
+
+/* Common DAC base address for the LC, RBV, Valkyrie, and IIvx */
+#define DAC_BASE 0x50f24000
+
+/* Some addresses for the DAFB */
+#define DAFB_BASE 0xf9800200
+
+/* Address for the built-in Civic framebuffer in Quadra AVs */
+#define CIVIC_BASE 0x50f30800	/* Only tested on 660AV! */
+
+/* GSC (Gray Scale Controller) base address */
+#define GSC_BASE 0x50F20000
+
+/* 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 volatile struct {
+	unsigned char addr;
+	/* Note: word-aligned */
+	char pad[3];
+	unsigned char lut;
+} *valkyrie_cmap_regs;
+
+static volatile struct {
+	unsigned char addr;
+	unsigned char lut;
+} *v8_brazil_cmap_regs;
+
+static volatile struct {
+	unsigned char addr;
+	char pad1[3]; /* word aligned */
+	unsigned char lut;
+	char pad2[3]; /* word aligned */
+	unsigned char cntl; /* a guess as to purpose */
+} *rbv_cmap_regs;
+
+static volatile struct {
+	unsigned long reset;
+	unsigned long pad1[3];
+	unsigned char pad2[3];
+	unsigned char lut;
+} *dafb_cmap_regs;
+
+static volatile struct {
+	unsigned char addr;	/* OFFSET: 0x00 */
+	unsigned char pad1[15];
+	unsigned char lut;	/* OFFSET: 0x10 */
+	unsigned char pad2[15];
+	unsigned char status;	/* OFFSET: 0x20 */
+	unsigned char pad3[7];
+	unsigned long vbl_addr;	/* OFFSET: 0x28 */
+	unsigned int  status2;	/* OFFSET: 0x2C */
+} *civic_cmap_regs;
+
+static volatile struct {
+	char    pad1[0x40];
+        unsigned char	clut_waddr;	/* 0x40 */
+        char    pad2;
+        unsigned char	clut_data;	/* 0x42 */
+        char	pad3[0x3];
+        unsigned char	clut_raddr;	/* 0x46 */
+} *csc_cmap_regs;
+
+/* We will leave these the way they are for the time being */
+struct mdc_cmap_regs {
+	char pad1[0x200200];
+	unsigned char addr;
+	char pad2[6];
+	unsigned char lut;
+};
+
+struct toby_cmap_regs {
+	char pad1[0x90018];
+	unsigned char lut; /* TFBClutWDataReg, offset 0x90018 */
+	char pad2[3];
+	unsigned char addr; /* TFBClutAddrReg, offset 0x9001C */
+};
+
+struct jet_cmap_regs {
+	char pad1[0xe0e000];
+	unsigned char addr;
+	unsigned char lut;
+};
+
+#define PIXEL_TO_MM(a)	(((a)*10)/28)	/* width in mm at 72 dpi */	
+
+/* mode */
+static int  video_slot = 0;
+
+static struct fb_var_screeninfo macfb_defined = {
+	.bits_per_pixel	= 8,	
+	.activate	= FB_ACTIVATE_NOW,
+	.width		= -1,
+	.height		= -1,
+	.right_margin	= 32,
+	.upper_margin	= 16,
+	.lower_margin	= 4,
+	.vsync_len	= 4,
+	.vmode		= FB_VMODE_NONINTERLACED,
+};
+
+static struct fb_fix_screeninfo macfb_fix = {
+	.id	= "Macintosh ",
+	.type	= FB_TYPE_PACKED_PIXELS,
+	.accel	= FB_ACCEL_NONE,
+};
+
+static struct fb_info fb_info;
+static u32 pseudo_palette[17];
+static int inverse   = 0;
+static int vidtest   = 0;
+
+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)
+{
+	/* 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) {
+		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);
+			nop();
+			nubus_writeb(info->cmap.green[i] >> 8, &dafb_cmap_regs->lut);
+			nop();
+			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)	
+{
+	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 */
+
+	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();
+
+	/* 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);
+
+	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)
+{
+	/* 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 */
+
+	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));
+
+	/* reset clut? (VideoToolbox sez "not necessary") */
+	nubus_writeb(0xFF, &rbv_cmap_regs->cntl); nop();
+	
+	/* tell clut which address to use. */
+	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. */
+	return 0;
+}
+
+/* Macintosh Display Card (8x24) */
+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;
+	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);
+
+	local_irq_restore(flags);
+	return 0;
+}
+
+/* Toby frame buffer */
+static int toby_setpalette(unsigned int regno, unsigned int red,
+			   unsigned int green, unsigned int blue,
+			   struct fb_info *info) 
+{
+	volatile struct toby_cmap_regs *cmap_regs =
+		nubus_slot_addr(video_slot);
+	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;
+
+	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);
+
+	local_irq_restore(flags);
+	return 0;
+}
+
+/* Jet frame buffer */
+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);
+	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);
+
+	local_irq_restore(flags);
+	return 0;
+}
+
+/*
+ * 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 
+ * 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 
+ * 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 lastreg = -1;
+	unsigned long flags;
+	int clut_status;
+	
+	if (info->var.bits_per_pixel > 8) return 1; /* failsafe */
+
+	red   >>= 8;
+	green >>= 8;
+	blue  >>= 8;
+
+	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
+
+	/*
+	 * Grab a status word and do some checking;
+	 * Then finally write the clut!
+	 */
+	clut_status =  nubus_readb(&civic_cmap_regs->status2);
+
+	if ((clut_status & 0x0008) == 0)
+	{
+#if 0
+		if ((clut_status & 0x000D) != 0)
+		{
+			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();
+	}
+	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();
+
+		if ((clut_status & 0x000D) != 0)
+		{
+			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();
+	}
+
+	local_irq_restore(flags);
+	lastreg = regno;
+	return 0;
+}
+
+/*
+ * The CSC is the framebuffer on the PowerBook 190 series
+ * (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)
+{
+	mdelay(1);
+	csc_cmap_regs->clut_waddr = regno;
+	csc_cmap_regs->clut_data = red;
+	csc_cmap_regs->clut_data = green;
+	csc_cmap_regs->clut_data = blue;
+	return 0;
+}
+
+static int macfb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			   unsigned blue, unsigned transp,
+			   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.
+	 */
+	
+	if (regno >= fb_info->cmap.len)
+		return 1;
+
+	switch (fb_info->var.bits_per_pixel) {
+	case 1:
+		/* We shouldn't get here */
+		break;
+	case 2:
+	case 4:
+	case 8:
+		if (macfb_setpalette)
+			macfb_setpalette(regno, red, green, blue, fb_info);
+		else
+			return 1;
+		break;
+	case 16:
+		if (fb_info->var.red.offset == 10) {
+			/* 1:5:5:5 */
+			((u32*) (fb_info->pseudo_palette))[regno] =
+					((red   & 0xf800) >>  1) |
+					((green & 0xf800) >>  6) |
+					((blue  & 0xf800) >> 11) |
+					((transp != 0) << 15);
+		} else {
+			/* 0:5:6:5 */
+			((u32*) (fb_info->pseudo_palette))[regno] =
+					((red   & 0xf800)      ) |
+					((green & 0xfc00) >>  5) |
+					((blue  & 0xf800) >> 11);
+		}
+		break;	
+		/* I'm pretty sure that one or the other of these
+		   doesn't exist on 68k Macs */
+	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)   |
+			(green << fb_info->var.green.offset) |
+			(blue  << fb_info->var.blue.offset);
+		break;
+    }
+    return 0;
+}
+
+static struct fb_ops macfb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_setcolreg	= macfb_setcolreg,
+	.fb_fillrect	= cfb_fillrect,
+	.fb_copyarea	= cfb_copyarea,
+	.fb_imageblit	= cfb_imageblit,
+	.fb_cursor	= soft_cursor,
+};
+
+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;
+	}
+}
+
+void __init macfb_init(void)
+{
+	int video_cmap_len, video_is_nubus = 0;
+	struct nubus_dev* ndev = NULL;
+	char *option = NULL;
+
+	if (fb_get_options("macfb", &option))
+		return -ENODEV;
+	macfb_setup(option);
+
+	if (!MACH_IS_MAC) 
+		return;
+
+	/* There can only be one internal video controller anyway so
+	   we're not too worried about this */
+	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;
+	/* 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);
+	
+	/*
+	 *	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);	 
+
+	printk("macfb: scrolling: redraw\n");
+	macfb_defined.yres_virtual = 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 */
+		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;
+		video_cmap_len = 0;
+		macfb_fix.visual = FB_VISUAL_MONO01;
+		break;
+	case 2:
+	case 4:
+	case 8:
+		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;
+		video_cmap_len = 1 << macfb_defined.bits_per_pixel;
+		macfb_fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		break;
+	case 16:
+		macfb_defined.transp.offset = 15;
+		macfb_defined.transp.length = 1;
+		macfb_defined.red.offset = 10;
+		macfb_defined.red.length = 5;
+		macfb_defined.green.offset = 5;
+		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 */
+		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;
+	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);
+		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.
+	 */
+	/* 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)
+	{
+		if (!(mac_bi_data.videoaddr >= ndev->board->slot_addr
+		      && (mac_bi_data.videoaddr <
+			  (unsigned long)nubus_slot_addr(ndev->board->slot+1))))
+			continue;
+		video_is_nubus = 1;
+		/* We should probably just use the slot address... */
+		video_slot = ndev->board->slot;
+
+		switch(ndev->dr_hw) {
+		case NUBUS_DRHW_APPLE_MDC:
+			strcat( macfb_fix.id, "Display Card" );
+			macfb_setpalette = mdc_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			break;
+		case NUBUS_DRHW_APPLE_TFB:
+			strcat( macfb_fix.id, "Toby" );
+			macfb_setpalette = toby_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			break;
+		case NUBUS_DRHW_APPLE_JET:
+			strcat( macfb_fix.id, "Jet");
+			macfb_setpalette = jet_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			break;			
+		default:
+			strcat( macfb_fix.id, "Generic NuBus" );
+			break;
+		}
+	}
+
+	/* 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 )
+		{
+			/* These don't have onboard video.  Eventually, we may
+			   be able to write separate framebuffer drivers for
+			   them (tobyfb.c, hiresfb.c, etc, etc) */
+		case MAC_MODEL_II:
+		case MAC_MODEL_IIX:
+		case MAC_MODEL_IICX:
+		case MAC_MODEL_IIFX:
+			strcat( macfb_fix.id, "Generic NuBus" );
+			break;
+
+			/* Valkyrie Quadras */
+		case MAC_MODEL_Q630:
+			/* I'm not sure about this one */
+		case MAC_MODEL_P588:
+			strcat( macfb_fix.id, "Valkyrie built-in" );
+			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 */
+		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:
+		case MAC_MODEL_C650:
+		case MAC_MODEL_C610:
+		case MAC_MODEL_Q700:
+		case MAC_MODEL_Q900:
+		case MAC_MODEL_Q950:
+			strcat( macfb_fix.id, "DAFB built-in" );
+			macfb_setpalette = dafb_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			dafb_cmap_regs = ioremap(DAFB_BASE, 0x1000);
+			break;
+
+			/* LC II uses the V8 framebuffer */
+		case MAC_MODEL_LCII:
+			strcat( macfb_fix.id, "V8 built-in" );
+			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) */
+		case MAC_MODEL_IIVI:
+		case MAC_MODEL_IIVX:
+		case MAC_MODEL_P600:
+			strcat( macfb_fix.id, "Brazil built-in" );
+			macfb_setpalette = v8_brazil_setpalette;
+			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. */
+		case MAC_MODEL_LCIII:
+		case MAC_MODEL_P520:
+		case MAC_MODEL_P550:
+		case MAC_MODEL_P460:
+			macfb_setpalette = v8_brazil_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			strcat( macfb_fix.id, "Sonora built-in" );
+			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) */
+		case MAC_MODEL_IICI:
+		case MAC_MODEL_IISI:
+			macfb_setpalette = rbv_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			strcat( macfb_fix.id, "RBV built-in" );
+			rbv_cmap_regs = ioremap(DAC_BASE, 0x1000);
+			break;
+
+			/* AVs use the Civic framebuffer */
+		case MAC_MODEL_Q840:
+		case MAC_MODEL_C660:
+			macfb_setpalette = civic_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			strcat( macfb_fix.id, "Civic built-in" );
+			civic_cmap_regs = ioremap(CIVIC_BASE, 0x1000);
+			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 */
+		case MAC_MODEL_LC:
+			if (vidtest) {
+				macfb_setpalette = v8_brazil_setpalette;
+				macfb_defined.activate = FB_ACTIVATE_NOW;
+				v8_brazil_cmap_regs =
+					ioremap(DAC_BASE, 0x1000);
+			}
+			strcat( macfb_fix.id, "LC built-in" );
+			break;
+			/* We think this may be like the LC II */
+		case MAC_MODEL_CCL:
+			if (vidtest) {
+				macfb_setpalette = v8_brazil_setpalette;
+				macfb_defined.activate = FB_ACTIVATE_NOW;
+				v8_brazil_cmap_regs =
+					ioremap(DAC_BASE, 0x1000);
+			}
+			strcat( macfb_fix.id, "Color Classic built-in" );
+			break;
+
+			/* And we *do* mean "weirdos" */
+		case MAC_MODEL_TV:
+			strcat( macfb_fix.id, "Mac TV built-in" );
+			break;
+
+			/* These don't have colour, so no need to worry */
+		case MAC_MODEL_SE30:
+		case MAC_MODEL_CLII:
+			strcat( macfb_fix.id, "Monochrome built-in" );
+			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. */
+
+		case MAC_MODEL_PB140:
+		case MAC_MODEL_PB145:
+		case MAC_MODEL_PB170:
+			strcat( macfb_fix.id, "DDC built-in" );
+			break;
+
+			/* Internal is GSC, External (if present) is ViSC */
+		case MAC_MODEL_PB150:	/* no external video */
+		case MAC_MODEL_PB160:
+		case MAC_MODEL_PB165:
+		case MAC_MODEL_PB180:
+		case MAC_MODEL_PB210:
+		case MAC_MODEL_PB230:
+			strcat( macfb_fix.id, "GSC built-in" );
+			break;
+
+			/* Internal is TIM, External is ViSC */
+		case MAC_MODEL_PB165C:
+		case MAC_MODEL_PB180C:
+			strcat( macfb_fix.id, "TIM built-in" );
+			break;
+
+			/* Internal is CSC, External is Keystone+Ariel. */
+		case MAC_MODEL_PB190:	/* external video is optional */
+		case MAC_MODEL_PB520:
+		case MAC_MODEL_PB250:
+		case MAC_MODEL_PB270C:
+		case MAC_MODEL_PB280:
+		case MAC_MODEL_PB280C:
+			macfb_setpalette = csc_setpalette;
+			macfb_defined.activate = FB_ACTIVATE_NOW;
+			strcat( macfb_fix.id, "CSC built-in" );
+			csc_cmap_regs = ioremap(CSC_BASE, 0x1000);
+			break;
+		
+		default:
+			strcat( macfb_fix.id, "Unknown/Unsupported built-in" );
+			break;
+		}
+
+	fb_info.fbops		= &macfb_ops;
+	fb_info.var		= macfb_defined;
+	fb_info.fix		= macfb_fix;
+	fb_info.pseudo_palette	= pseudo_palette;
+	fb_info.flags		= FBINFO_DEFAULT;
+
+	fb_alloc_cmap(&fb_info.cmap, video_cmap_len, 0);
+	
+	if (register_framebuffer(&fb_info) < 0)
+		return;
+
+	printk("fb%d: %s frame buffer device\n",
+	       fb_info.node, fb_info.fix.id);
+}
+
+module_init(macfb_init);
+MODULE_LICENSE("GPL");