From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: 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!
---
 drivers/video/retz3fb.c | 1587 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1587 insertions(+)
 create mode 100644 drivers/video/retz3fb.c

(limited to 'drivers/video/retz3fb.c')

diff --git a/drivers/video/retz3fb.c b/drivers/video/retz3fb.c
new file mode 100644
index 000000000000..5e2c64f622cb
--- /dev/null
+++ b/drivers/video/retz3fb.c
@@ -0,0 +1,1587 @@
+/*
+ * Linux/drivers/video/retz3fb.c -- RetinaZ3 frame buffer device
+ *
+ *    Copyright (C) 1997 Jes Sorensen
+ *
+ * This file is based on the CyberVision64 frame buffer device and
+ * the generic Cirrus Logic driver.
+ *
+ * cyberfb.c: Copyright (C) 1996 Martin Apel,
+ *                               Geert Uytterhoeven
+ * clgen.c:   Copyright (C) 1996 Frank Neumann
+ *
+ * History:
+ *   - 22 Jan 97: Initial work
+ *   - 14 Feb 97: Screen initialization works somewhat, still only
+ *                8-bit packed pixel is supported.
+ *
+ * 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/kernel.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/fb.h>
+#include <linux/zorro.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <asm/pgtable.h>
+#include <asm/io.h>
+
+#include <video/fbcon.h>
+#include <video/fbcon-cfb8.h>
+#include <video/fbcon-cfb16.h>
+
+#include "retz3fb.h"
+
+/* #define DEBUG if(1) */
+#define DEBUG if(0)
+
+/*
+ * Reserve space for one pattern line.
+ *
+ * For the time being we only support 4MB boards!
+ */
+
+#define PAT_MEM_SIZE 16*3
+#define PAT_MEM_OFF  (4*1024*1024 - PAT_MEM_SIZE)
+
+struct retz3fb_par {
+	int xres;
+	int yres;
+	int xres_vir;
+	int yres_vir;
+	int xoffset;
+	int yoffset;
+	int bpp;
+
+	struct fb_bitfield red;
+	struct fb_bitfield green;
+	struct fb_bitfield blue;
+	struct fb_bitfield transp;
+
+	int pixclock;
+	int left_margin;	/* time from sync to picture	*/
+	int right_margin;	/* time from picture to sync	*/
+	int upper_margin;	/* time from sync to picture	*/
+	int lower_margin;
+	int hsync_len;	/* length of horizontal sync	*/
+	int vsync_len;	/* length of vertical sync	*/
+	int vmode;
+
+	int accel;
+};
+
+struct display_data {
+	long h_total;		/* Horizontal Total */
+	long h_sstart;		/* Horizontal Sync Start */
+	long h_sstop;		/* Horizontal Sync Stop */
+	long h_bstart;		/* Horizontal Blank Start */
+	long h_bstop;		/* Horizontal Blank Stop */
+	long h_dispend;		/* Horizontal Display End */
+	long v_total;		/* Vertical Total */
+	long v_sstart;		/* Vertical Sync Start */
+	long v_sstop;		/* Vertical Sync Stop */
+	long v_bstart;		/* Vertical Blank Start */
+	long v_bstop;		/* Vertical Blank Stop */
+	long v_dispend;		/* Horizontal Display End */
+};
+
+struct retz3_fb_info {
+	struct fb_info info;
+	unsigned char *base;
+	unsigned char *fbmem;
+	unsigned long fbsize;
+	volatile unsigned char *regs;
+	unsigned long physfbmem;
+	unsigned long physregs;
+	int current_par_valid; /* set to 0 by memset */
+	int blitbusy;
+	struct display disp;
+	struct retz3fb_par current_par;
+	unsigned char color_table [256][3];
+};
+
+
+static char fontname[40] __initdata = { 0 };
+
+#define retz3info(info) ((struct retz3_fb_info *)(info))
+#define fbinfo(info) ((struct fb_info *)(info))
+
+
+/*
+ *    Frame Buffer Name
+ */
+
+static char retz3fb_name[16] = "RetinaZ3";
+
+
+/*
+ * A small info on how to convert XFree86 timing values into fb
+ * timings - by Frank Neumann:
+ *
+An XFree86 mode line consists of the following fields:
+ "800x600"     50      800  856  976 1040    600  637  643  666
+ < name >     DCF       HR  SH1  SH2  HFL     VR  SV1  SV2  VFL
+
+The fields in the fb_var_screeninfo structure are:
+        unsigned long pixclock;         * pixel clock in ps (pico seconds) *
+        unsigned long left_margin;      * time from sync to picture    *
+        unsigned long right_margin;     * time from picture to sync    *
+        unsigned long upper_margin;     * time from sync to picture    *
+        unsigned long lower_margin;
+        unsigned long hsync_len;        * length of horizontal sync    *
+        unsigned long vsync_len;        * length of vertical sync      *
+
+1) Pixelclock:
+   xfree: in MHz
+   fb: In Picoseconds (ps)
+
+   pixclock = 1000000 / DCF
+
+2) horizontal timings:
+   left_margin = HFL - SH2
+   right_margin = SH1 - HR
+   hsync_len = SH2 - SH1
+
+3) vertical timings:
+   upper_margin = VFL - SV2
+   lower_margin = SV1 - VR
+   vsync_len = SV2 - SV1
+
+Good examples for VESA timings can be found in the XFree86 source tree,
+under "programs/Xserver/hw/xfree86/doc/modeDB.txt".
+*/
+
+/*
+ *    Predefined Video Modes
+ */
+
+static struct {
+    const char *name;
+    struct fb_var_screeninfo var;
+} retz3fb_predefined[] __initdata = {
+    /*
+     * NB: it is very important to adjust the pixel-clock to the color-depth.
+     */
+
+    {
+	"640x480", {		/* 640x480, 8 bpp */
+	    640, 480, 640, 480, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCEL_NONE, 39722, 48, 16, 33, 10, 96, 2,
+	    FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,FB_VMODE_NONINTERLACED
+	}
+    },
+    /*
+     ModeLine "800x600" 36 800 824 896 1024 600 601 603 625
+	      < name > DCF HR  SH1 SH2  HFL VR  SV1 SV2 VFL
+     */
+    {
+	"800x600", {		/* 800x600, 8 bpp */
+	    800, 600, 800, 600, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCELF_TEXT, 27778, 64, 24, 22, 1, 120, 2,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    },
+    {
+	"800x600-60", {		/* 800x600, 8 bpp */
+	    800, 600, 800, 600, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCELF_TEXT, 25000, 88, 40, 23, 1, 128, 4,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    },
+    {
+	"800x600-70", {		/* 800x600, 8 bpp */
+	    800, 600, 800, 600, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCELF_TEXT, 22272, 40, 24, 15, 9, 144, 12,
+	    FB_SYNC_COMP_HIGH_ACT, FB_VMODE_NONINTERLACED
+	}
+    },
+    /*
+      ModeLine "1024x768i" 45 1024 1064 1224 1264 768 777 785 817 interlace
+	       < name >   DCF HR  SH1  SH2  HFL  VR  SV1 SV2 VFL
+     */
+    {
+	"1024x768i", {		/* 1024x768, 8 bpp, interlaced */
+	    1024, 768, 1024, 768, 0, 0, 8, 0,
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
+	    0, 0, -1, -1, FB_ACCELF_TEXT, 22222, 40, 40, 32, 9, 160, 8,
+	    FB_SYNC_COMP_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_INTERLACED
+	}
+    },
+    {
+	"1024x768", {
+	    1024, 768, 1024, 768, 0, 0, 8, 0, 
+	    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0}, 
+	    0, 0, -1, -1, FB_ACCEL_NONE, 12500, 92, 112, 31, 2, 204, 4,
+	    FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
+	 }
+    },
+    {
+	"640x480-16", {		/* 640x480, 16 bpp */
+	    640, 480, 640, 480, 0, 0, 16, 0,
+	    {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0},
+	    0, 0, -1, -1, 0, 38461/2, 28, 32, 12, 10, 96, 2,
+	    FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,FB_VMODE_NONINTERLACED
+	}
+    },
+    {
+	"640x480-24", {		/* 640x480, 24 bpp */
+	    640, 480, 640, 480, 0, 0, 24, 0,
+	    {8, 8, 8}, {8, 8, 8}, {8, 8, 8}, {0, 0, 0},
+	    0, 0, -1, -1, 0, 38461/3, 28, 32, 12, 10, 96, 2,
+	    FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,FB_VMODE_NONINTERLACED
+	}
+    },
+};
+
+
+#define NUM_TOTAL_MODES    ARRAY_SIZE(retz3fb_predefined)
+
+static struct fb_var_screeninfo retz3fb_default;
+
+static int z3fb_inverse = 0;
+static int z3fb_mode __initdata = 0;
+
+
+/*
+ *    Interface used by the world
+ */
+
+int retz3fb_setup(char *options);
+
+static int retz3fb_get_fix(struct fb_fix_screeninfo *fix, int con,
+			   struct fb_info *info);
+static int retz3fb_get_var(struct fb_var_screeninfo *var, int con,
+			   struct fb_info *info);
+static int retz3fb_set_var(struct fb_var_screeninfo *var, int con,
+			   struct fb_info *info);
+static int retz3fb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
+			    struct fb_info *info);
+static int retz3fb_setcolreg(unsigned int regno, unsigned int red,
+			     unsigned int green, unsigned int blue,
+			     unsigned int transp, struct fb_info *info);
+static int retz3fb_blank(int blank, struct fb_info *info);
+
+
+/*
+ *    Interface to the low level console driver
+ */
+
+int retz3fb_init(void);
+static int z3fb_switch(int con, struct fb_info *info);
+static int z3fb_updatevar(int con, struct fb_info *info);
+
+
+/*
+ *    Text console acceleration
+ */
+
+#ifdef FBCON_HAS_CFB8
+static struct display_switch fbcon_retz3_8;
+#endif
+
+
+/*
+ *    Accelerated Functions used by the low level console driver
+ */
+
+static void retz3_bitblt(struct display *p,
+			 unsigned short curx, unsigned short cury, unsigned
+			 short destx, unsigned short desty, unsigned short
+			 width, unsigned short height, unsigned short cmd,
+			 unsigned short mask);
+
+/*
+ *   Hardware Specific Routines
+ */
+
+static int retz3_encode_fix(struct fb_info *info,
+			    struct fb_fix_screeninfo *fix,
+			    struct retz3fb_par *par);
+static int retz3_decode_var(struct fb_var_screeninfo *var,
+			    struct retz3fb_par *par);
+static int retz3_encode_var(struct fb_var_screeninfo *var,
+			    struct retz3fb_par *par);
+static int retz3_getcolreg(unsigned int regno, unsigned int *red,
+			   unsigned int *green, unsigned int *blue,
+			   unsigned int *transp, struct fb_info *info);
+
+/*
+ *    Internal routines
+ */
+
+static void retz3fb_get_par(struct fb_info *info, struct retz3fb_par *par);
+static void retz3fb_set_par(struct fb_info *info, struct retz3fb_par *par);
+static int do_fb_set_var(struct fb_info *info,
+			 struct fb_var_screeninfo *var, int isactive);
+static void retz3fb_set_disp(int con, struct fb_info *info);
+static int get_video_mode(const char *name);
+
+
+/* -------------------- Hardware specific routines ------------------------- */
+
+static unsigned short find_fq(unsigned int freq)
+{
+	unsigned long f;
+	long tmp;
+	long prev = 0x7fffffff;
+	long n2, n1 = 3;
+	unsigned long m;
+	unsigned short res = 0;
+
+	if (freq <= 31250000)
+		n2 = 3;
+	else if (freq <= 62500000)
+		n2 = 2;
+	else if (freq <= 125000000)
+		n2 = 1;
+	else if (freq <= 250000000)
+		n2 = 0;
+	else
+		return 0;
+
+
+	do {
+		f = freq >> (10 - n2);
+
+		m = (f * n1) / (14318180/1024);
+
+		if (m > 129)
+			break;
+
+		tmp =  (((m * 14318180) >> n2) / n1) - freq;
+		if (tmp < 0)
+			tmp = -tmp;
+
+		if (tmp < prev) {
+			prev = tmp;
+			res = (((n2 << 5) | (n1-2)) << 8) | (m-2);
+		}
+
+	} while ( (++n1) <= 21);
+
+	return res;
+}
+
+
+static int retz3_set_video(struct fb_info *info,
+			   struct fb_var_screeninfo *var,
+			   struct retz3fb_par *par)
+{
+	volatile unsigned char *regs = retz3info(info)->regs;
+	unsigned int freq;
+
+	int xres, hfront, hsync, hback;
+	int yres, vfront, vsync, vback;
+	unsigned char tmp;
+	unsigned short best_freq;
+	struct display_data data;
+
+	short clocksel = 0; /* Apparantly this is always zero */
+
+	int bpp = var->bits_per_pixel;
+
+	/*
+	 * XXX
+	 */
+	if (bpp == 24)
+		return 0;
+
+	if ((bpp != 8) && (bpp != 16) && (bpp != 24))
+		return -EFAULT;
+
+	par->xoffset = 0;
+	par->yoffset = 0;
+
+	xres   = var->xres * bpp / 4;
+	hfront = var->right_margin * bpp / 4;
+	hsync  = var->hsync_len * bpp / 4;
+	hback  = var->left_margin * bpp / 4;
+
+	if (var->vmode & FB_VMODE_DOUBLE)
+	{
+		yres = var->yres * 2;
+		vfront = var->lower_margin * 2;
+		vsync  = var->vsync_len * 2;
+		vback  = var->upper_margin * 2;
+	}
+	else if (var->vmode & FB_VMODE_INTERLACED)
+	{
+		yres   = (var->yres + 1) / 2;
+		vfront = (var->lower_margin + 1) / 2;
+		vsync  = (var->vsync_len + 1) / 2;
+		vback  = (var->upper_margin + 1) / 2;
+	}
+	else
+	{
+		yres   = var->yres; /* -1 ? */
+		vfront = var->lower_margin;
+		vsync  = var->vsync_len;
+		vback  = var->upper_margin;
+	}
+
+	data.h_total	= (hback / 8) + (xres / 8)
+			+ (hfront / 8) + (hsync / 8) - 1 /* + 1 */;
+	data.h_dispend	= ((xres + bpp - 1)/ 8) - 1;
+	data.h_bstart	= xres / 8 - 1 /* + 1 */;
+
+	data.h_bstop	= data.h_total+1 + 2 + 1;
+	data.h_sstart	= (xres / 8) + (hfront / 8) + 1;
+	data.h_sstop	= (xres / 8) + (hfront / 8) + (hsync / 8) + 1;
+
+	data.v_total	= yres + vfront + vsync + vback - 1;
+
+	data.v_dispend	= yres - 1;
+	data.v_bstart	= yres - 1;
+
+	data.v_bstop	= data.v_total;
+	data.v_sstart	= yres + vfront - 1 - 2;
+	data.v_sstop	= yres + vfront + vsync - 1;
+
+#if 0 /* testing */
+
+	printk("HBS: %i\n", data.h_bstart);
+	printk("HSS: %i\n", data.h_sstart);
+	printk("HSE: %i\n", data.h_sstop);
+	printk("HBE: %i\n", data.h_bstop);
+	printk("HT: %i\n", data.h_total);
+
+	printk("hsync: %i\n", hsync);
+	printk("hfront: %i\n", hfront);
+	printk("hback: %i\n", hback);
+
+	printk("VBS: %i\n", data.v_bstart);
+	printk("VSS: %i\n", data.v_sstart);
+	printk("VSE: %i\n", data.v_sstop);
+	printk("VBE: %i\n", data.v_bstop);
+	printk("VT: %i\n", data.v_total);
+
+	printk("vsync: %i\n", vsync);
+	printk("vfront: %i\n", vfront);
+	printk("vback: %i\n", vback);
+#endif
+
+	if (data.v_total >= 1024)
+		printk(KERN_ERR "MAYDAY: v_total >= 1024; bailing out!\n");
+
+	reg_w(regs, GREG_MISC_OUTPUT_W, 0xe3 | ((clocksel & 3) * 0x04));
+	reg_w(regs, GREG_FEATURE_CONTROL_W, 0x00);
+
+	seq_w(regs, SEQ_RESET, 0x00);
+	seq_w(regs, SEQ_RESET, 0x03);	/* reset sequencer logic */
+
+	/*
+	 * CLOCKING_MODE bits:
+	 * 2: This one is only set for certain text-modes, wonder if
+	 *    it may be for EGA-lines? (it was referred to as CLKDIV2)
+	 * (The CL drivers sets it to 0x21 with the comment:
+	 *  FullBandwidth (video off) and 8/9 dot clock)
+	 */
+	seq_w(regs, SEQ_CLOCKING_MODE, 0x01 | 0x00 /* 0x08 */);
+
+	seq_w(regs, SEQ_MAP_MASK, 0x0f);        /* enable writing to plane 0-3 */
+	seq_w(regs, SEQ_CHAR_MAP_SELECT, 0x00); /* doesn't matter in gfx-mode */
+	seq_w(regs, SEQ_MEMORY_MODE, 0x06); /* CL driver says 0x0e for 256 col mode*/
+	seq_w(regs, SEQ_RESET, 0x01);
+	seq_w(regs, SEQ_RESET, 0x03);
+
+	seq_w(regs, SEQ_EXTENDED_ENABLE, 0x05);
+
+	seq_w(regs, SEQ_CURSOR_CONTROL, 0x00);	/* disable cursor */
+	seq_w(regs, SEQ_PRIM_HOST_OFF_HI, 0x00);
+	seq_w(regs, SEQ_PRIM_HOST_OFF_HI, 0x00);
+	seq_w(regs, SEQ_LINEAR_0, 0x4a);
+	seq_w(regs, SEQ_LINEAR_1, 0x00);
+
+	seq_w(regs, SEQ_SEC_HOST_OFF_HI, 0x00);
+	seq_w(regs, SEQ_SEC_HOST_OFF_LO, 0x00);
+	seq_w(regs, SEQ_EXTENDED_MEM_ENA, 0x3 | 0x4 | 0x10 | 0x40);
+
+	/*
+	 * The lower 4 bits (0-3) are used to set the font-width for
+	 * text-mode - DON'T try to set this for gfx-mode.
+	 */
+	seq_w(regs, SEQ_EXT_CLOCK_MODE, 0x10);
+	seq_w(regs, SEQ_EXT_VIDEO_ADDR, 0x03);
+
+	/*
+	 * Extended Pixel Control:
+	 * bit 0:   text-mode=0, gfx-mode=1 (Graphics Byte ?)
+	 * bit 1: (Packed/Nibble Pixel Format ?)
+	 * bit 4-5: depth, 0=1-8bpp, 1=9-16bpp, 2=17-24bpp
+	 */
+	seq_w(regs, SEQ_EXT_PIXEL_CNTL, 0x01 | (((bpp / 8) - 1) << 4));
+
+	seq_w(regs, SEQ_BUS_WIDTH_FEEDB, 0x04);
+	seq_w(regs, SEQ_COLOR_EXP_WFG, 0x01);
+	seq_w(regs, SEQ_COLOR_EXP_WBG, 0x00);
+	seq_w(regs, SEQ_EXT_RW_CONTROL, 0x00);
+	seq_w(regs, SEQ_MISC_FEATURE_SEL, (0x51 | (clocksel & 8)));
+	seq_w(regs, SEQ_COLOR_KEY_CNTL, 0x40);
+	seq_w(regs, SEQ_COLOR_KEY_MATCH0, 0x00);
+	seq_w(regs, SEQ_COLOR_KEY_MATCH1, 0x00);
+	seq_w(regs, SEQ_COLOR_KEY_MATCH2, 0x00);
+	seq_w(regs, SEQ_CRC_CONTROL, 0x00);
+	seq_w(regs, SEQ_PERF_SELECT, 0x10);
+	seq_w(regs, SEQ_ACM_APERTURE_1, 0x00);
+	seq_w(regs, SEQ_ACM_APERTURE_2, 0x30);
+	seq_w(regs, SEQ_ACM_APERTURE_3, 0x00);
+	seq_w(regs, SEQ_MEMORY_MAP_CNTL, 0x03);
+
+
+	/* unlock register CRT0..CRT7 */
+	crt_w(regs, CRT_END_VER_RETR, (data.v_sstop & 0x0f) | 0x20);
+
+	/* Zuerst zu schreibende Werte nur per printk ausgeben */
+	DEBUG printk("CRT_HOR_TOTAL: %ld\n", data.h_total);
+	crt_w(regs, CRT_HOR_TOTAL, data.h_total & 0xff);
+
+	DEBUG printk("CRT_HOR_DISP_ENA_END: %ld\n", data.h_dispend);
+	crt_w(regs, CRT_HOR_DISP_ENA_END, (data.h_dispend) & 0xff);
+
+	DEBUG printk("CRT_START_HOR_BLANK: %ld\n", data.h_bstart);
+	crt_w(regs, CRT_START_HOR_BLANK, data.h_bstart & 0xff);
+
+	DEBUG printk("CRT_END_HOR_BLANK: 128+%ld\n", data.h_bstop % 32);
+	crt_w(regs, CRT_END_HOR_BLANK,  0x80 | (data.h_bstop & 0x1f));
+
+	DEBUG printk("CRT_START_HOR_RETR: %ld\n", data.h_sstart);
+	crt_w(regs, CRT_START_HOR_RETR, data.h_sstart & 0xff);
+
+	tmp = (data.h_sstop & 0x1f);
+	if (data.h_bstop & 0x20)
+		tmp |= 0x80;
+	DEBUG printk("CRT_END_HOR_RETR: %d\n", tmp);
+	crt_w(regs, CRT_END_HOR_RETR, tmp);
+
+	DEBUG printk("CRT_VER_TOTAL: %ld\n", data.v_total & 0xff);
+	crt_w(regs, CRT_VER_TOTAL, (data.v_total & 0xff));
+
+	tmp = 0x10;  /* LineCompare bit #9 */
+	if (data.v_total & 256)
+		tmp |= 0x01;
+	if (data.v_dispend & 256)
+		tmp |= 0x02;
+	if (data.v_sstart & 256)
+		tmp |= 0x04;
+	if (data.v_bstart & 256)
+		tmp |= 0x08;
+	if (data.v_total & 512)
+		tmp |= 0x20;
+	if (data.v_dispend & 512)
+		tmp |= 0x40;
+	if (data.v_sstart & 512)
+		tmp |= 0x80;
+	DEBUG printk("CRT_OVERFLOW: %d\n", tmp);
+	crt_w(regs, CRT_OVERFLOW, tmp);
+
+	crt_w(regs, CRT_PRESET_ROW_SCAN, 0x00); /* not CL !!! */
+
+	tmp = 0x40; /* LineCompare bit #8 */
+	if (data.v_bstart & 512)
+		tmp |= 0x20;
+	if (var->vmode & FB_VMODE_DOUBLE)
+		tmp |= 0x80;
+ 	DEBUG printk("CRT_MAX_SCAN_LINE: %d\n", tmp);
+	crt_w(regs, CRT_MAX_SCAN_LINE, tmp);
+
+	crt_w(regs, CRT_CURSOR_START, 0x00);
+	crt_w(regs, CRT_CURSOR_END, 8 & 0x1f); /* font height */
+
+	crt_w(regs, CRT_START_ADDR_HIGH, 0x00);
+	crt_w(regs, CRT_START_ADDR_LOW, 0x00);
+
+	crt_w(regs, CRT_CURSOR_LOC_HIGH, 0x00);
+	crt_w(regs, CRT_CURSOR_LOC_LOW, 0x00);
+
+ 	DEBUG printk("CRT_START_VER_RETR: %ld\n", data.v_sstart & 0xff);
+	crt_w(regs, CRT_START_VER_RETR, (data.v_sstart & 0xff));
+
+#if 1
+	/* 5 refresh cycles per scanline */
+	DEBUG printk("CRT_END_VER_RETR: 64+32+%ld\n", data.v_sstop % 16);
+	crt_w(regs, CRT_END_VER_RETR, ((data.v_sstop & 0x0f) | 0x40 | 0x20));
+#else
+	DEBUG printk("CRT_END_VER_RETR: 128+32+%ld\n", data.v_sstop % 16);
+	crt_w(regs, CRT_END_VER_RETR, ((data.v_sstop & 0x0f) | 128 | 32));
+#endif
+	DEBUG printk("CRT_VER_DISP_ENA_END: %ld\n", data.v_dispend & 0xff);
+	crt_w(regs, CRT_VER_DISP_ENA_END, (data.v_dispend & 0xff));
+
+	DEBUG printk("CRT_START_VER_BLANK: %ld\n", data.v_bstart & 0xff);
+	crt_w(regs, CRT_START_VER_BLANK, (data.v_bstart & 0xff));
+
+	DEBUG printk("CRT_END_VER_BLANK: %ld\n", data.v_bstop & 0xff);
+	crt_w(regs, CRT_END_VER_BLANK, (data.v_bstop & 0xff));
+
+	DEBUG printk("CRT_MODE_CONTROL: 0xe3\n");
+	crt_w(regs, CRT_MODE_CONTROL, 0xe3);
+
+	DEBUG printk("CRT_LINE_COMPARE: 0xff\n");
+	crt_w(regs, CRT_LINE_COMPARE, 0xff);
+
+	tmp = (var->xres_virtual / 8) * (bpp / 8);
+	crt_w(regs, CRT_OFFSET, tmp);
+
+	crt_w(regs, CRT_UNDERLINE_LOC, 0x07); /* probably font-height - 1 */
+
+	tmp = 0x20;			/* Enable extended end bits */
+	if (data.h_total & 0x100)
+		tmp |= 0x01;
+	if ((data.h_dispend) & 0x100)
+		tmp |= 0x02;
+	if (data.h_bstart & 0x100)
+		tmp |= 0x04;
+	if (data.h_sstart & 0x100)
+		tmp |= 0x08;
+	if (var->vmode & FB_VMODE_INTERLACED)
+		tmp |= 0x10;
+ 	DEBUG printk("CRT_EXT_HOR_TIMING1: %d\n", tmp);
+	crt_w(regs, CRT_EXT_HOR_TIMING1, tmp);
+
+	tmp = 0x00;
+	if (((var->xres_virtual / 8) * (bpp / 8)) & 0x100)
+		tmp |= 0x10;
+	crt_w(regs, CRT_EXT_START_ADDR, tmp);
+
+	tmp = 0x00;
+	if (data.h_total & 0x200)
+		tmp |= 0x01;
+	if ((data.h_dispend) & 0x200)
+		tmp |= 0x02;
+	if (data.h_bstart & 0x200)
+		tmp |= 0x04;
+	if (data.h_sstart & 0x200)
+		tmp |= 0x08;
+	tmp |= ((data.h_bstop & 0xc0) >> 2);
+	tmp |= ((data.h_sstop & 0x60) << 1);
+	crt_w(regs, CRT_EXT_HOR_TIMING2, tmp);
+ 	DEBUG printk("CRT_EXT_HOR_TIMING2: %d\n", tmp);
+
+	tmp = 0x10;			/* Line compare bit 10 */
+	if (data.v_total & 0x400)
+		tmp |= 0x01;
+	if ((data.v_dispend) & 0x400)
+		tmp |= 0x02;
+	if (data.v_bstart & 0x400)
+		tmp |= 0x04;
+	if (data.v_sstart & 0x400)
+		tmp |= 0x08;
+	tmp |= ((data.v_bstop & 0x300) >> 3);
+	if (data.v_sstop & 0x10)
+		tmp |= 0x80;
+	crt_w(regs, CRT_EXT_VER_TIMING, tmp);
+ 	DEBUG printk("CRT_EXT_VER_TIMING: %d\n", tmp);
+
+	crt_w(regs, CRT_MONITOR_POWER, 0x00);
+
+	/*
+	 * Convert from ps to Hz.
+	 */
+	freq = 2000000000 / var->pixclock;
+	freq = freq * 500;
+
+	best_freq = find_fq(freq);
+	pll_w(regs, 0x02, best_freq);
+	best_freq = find_fq(61000000);
+	pll_w(regs, 0x0a, best_freq);
+	pll_w(regs, 0x0e, 0x22);
+
+	gfx_w(regs, GFX_SET_RESET, 0x00);
+	gfx_w(regs, GFX_ENABLE_SET_RESET, 0x00);
+	gfx_w(regs, GFX_COLOR_COMPARE, 0x00);
+	gfx_w(regs, GFX_DATA_ROTATE, 0x00);
+	gfx_w(regs, GFX_READ_MAP_SELECT, 0x00);
+	gfx_w(regs, GFX_GRAPHICS_MODE, 0x00);
+	gfx_w(regs, GFX_MISC, 0x05);
+	gfx_w(regs, GFX_COLOR_XCARE, 0x0f);
+	gfx_w(regs, GFX_BITMASK, 0xff);
+
+	reg_r(regs, ACT_ADDRESS_RESET);
+	attr_w(regs, ACT_PALETTE0 , 0x00);
+	attr_w(regs, ACT_PALETTE1 , 0x01);
+	attr_w(regs, ACT_PALETTE2 , 0x02);
+	attr_w(regs, ACT_PALETTE3 , 0x03);
+	attr_w(regs, ACT_PALETTE4 , 0x04);
+	attr_w(regs, ACT_PALETTE5 , 0x05);
+	attr_w(regs, ACT_PALETTE6 , 0x06);
+	attr_w(regs, ACT_PALETTE7 , 0x07);
+	attr_w(regs, ACT_PALETTE8 , 0x08);
+	attr_w(regs, ACT_PALETTE9 , 0x09);
+	attr_w(regs, ACT_PALETTE10, 0x0a);
+	attr_w(regs, ACT_PALETTE11, 0x0b);
+	attr_w(regs, ACT_PALETTE12, 0x0c);
+	attr_w(regs, ACT_PALETTE13, 0x0d);
+	attr_w(regs, ACT_PALETTE14, 0x0e);
+	attr_w(regs, ACT_PALETTE15, 0x0f);
+	reg_r(regs, ACT_ADDRESS_RESET);
+
+	attr_w(regs, ACT_ATTR_MODE_CNTL, 0x09); /* 0x01 for CL */
+
+	attr_w(regs, ACT_OVERSCAN_COLOR, 0x00);
+	attr_w(regs, ACT_COLOR_PLANE_ENA, 0x0f);
+	attr_w(regs, ACT_HOR_PEL_PANNING, 0x00);
+	attr_w(regs, ACT_COLOR_SELECT, 0x00);
+
+	reg_r(regs, ACT_ADDRESS_RESET);
+	reg_w(regs, ACT_DATA, 0x20);
+
+	reg_w(regs, VDAC_MASK, 0xff);
+
+	/*
+	 * Extended palette addressing ???
+	 */
+	switch (bpp){
+	case 8:
+		reg_w(regs, 0x83c6, 0x00);
+		break;
+	case 16:
+		reg_w(regs, 0x83c6, 0x60);
+		break;
+	case 24:
+		reg_w(regs, 0x83c6, 0xe0);
+		break;
+	default:
+		printk(KERN_INFO "Illegal color-depth: %i\n", bpp);
+	}
+
+	reg_w(regs, VDAC_ADDRESS, 0x00);
+
+	seq_w(regs, SEQ_MAP_MASK, 0x0f );
+
+	return 0;
+}
+
+
+/*
+ *    This function should fill in the `fix' structure based on the
+ *    values in the `par' structure.
+ */
+
+static int retz3_encode_fix(struct fb_info *info,
+			    struct fb_fix_screeninfo *fix,
+			    struct retz3fb_par *par)
+{
+	struct retz3_fb_info *zinfo = retz3info(info);
+
+	memset(fix, 0, sizeof(struct fb_fix_screeninfo));
+	strcpy(fix->id, retz3fb_name);
+	fix->smem_start = zinfo->physfbmem;
+	fix->smem_len = zinfo->fbsize;
+	fix->mmio_start = zinfo->physregs;
+	fix->mmio_len = 0x00c00000;
+
+	fix->type = FB_TYPE_PACKED_PIXELS;
+	fix->type_aux = 0;
+	if (par->bpp == 8)
+		fix->visual = FB_VISUAL_PSEUDOCOLOR;
+	else
+		fix->visual = FB_VISUAL_TRUECOLOR;
+
+	fix->xpanstep = 0;
+	fix->ypanstep = 0;
+	fix->ywrapstep = 0;
+	fix->line_length = 0;
+
+	fix->accel = FB_ACCEL_NCR_77C32BLT;
+
+	return 0;
+}
+
+
+/*
+ *    Get the video params out of `var'. If a value doesn't fit, round
+ *    it up, if it's too big, return -EINVAL.
+ */
+
+static int retz3_decode_var(struct fb_var_screeninfo *var,
+			    struct retz3fb_par *par)
+{
+	par->xres = var->xres;
+	par->yres = var->yres;
+	par->xres_vir = var->xres_virtual;
+	par->yres_vir = var->yres_virtual;
+	par->bpp = var->bits_per_pixel;
+	par->pixclock = var->pixclock;
+	par->vmode = var->vmode;
+
+	par->red = var->red;
+	par->green = var->green;
+	par->blue = var->blue;
+	par->transp = var->transp;
+
+	par->left_margin = var->left_margin;
+	par->right_margin = var->right_margin;
+	par->upper_margin = var->upper_margin;
+	par->lower_margin = var->lower_margin;
+	par->hsync_len = var->hsync_len;
+	par->vsync_len = var->vsync_len;
+
+	if (var->accel_flags & FB_ACCELF_TEXT)
+	    par->accel = FB_ACCELF_TEXT;
+	else
+	    par->accel = 0;
+
+	return 0;
+}
+
+
+/*
+ *    Fill the `var' structure based on the values in `par' and maybe
+ *    other values read out of the hardware.
+ */
+
+static int retz3_encode_var(struct fb_var_screeninfo *var,
+			    struct retz3fb_par *par)
+{
+	memset(var, 0, sizeof(struct fb_var_screeninfo));
+	var->xres = par->xres;
+	var->yres = par->yres;
+	var->xres_virtual = par->xres_vir;
+	var->yres_virtual = par->yres_vir;
+	var->xoffset = 0;
+	var->yoffset = 0;
+
+	var->bits_per_pixel = par->bpp;
+	var->grayscale = 0;
+
+	var->red = par->red;
+	var->green = par->green;
+	var->blue = par->blue;
+	var->transp = par->transp;
+
+	var->nonstd = 0;
+	var->activate = 0;
+
+	var->height = -1;
+	var->width = -1;
+
+	var->accel_flags = (par->accel && par->bpp == 8) ? FB_ACCELF_TEXT : 0;
+
+	var->pixclock = par->pixclock;
+
+	var->sync = 0;				/* ??? */
+	var->left_margin = par->left_margin;
+	var->right_margin = par->right_margin;
+	var->upper_margin = par->upper_margin;
+	var->lower_margin = par->lower_margin;
+	var->hsync_len = par->hsync_len;
+	var->vsync_len = par->vsync_len;
+
+	var->vmode = par->vmode;
+	return 0;
+}
+
+
+/*
+ *    Set a single color register. Return != 0 for invalid regno.
+ */
+
+static int retz3fb_setcolreg(unsigned int regno, unsigned int red,
+			     unsigned int green, unsigned int blue,
+			     unsigned int transp, struct fb_info *info)
+{
+	struct retz3_fb_info *zinfo = retz3info(info);
+	volatile unsigned char *regs = zinfo->regs;
+
+	/* We'll get to this */
+
+	if (regno > 255)
+		return 1;
+
+	red >>= 10;
+	green >>= 10;
+	blue >>= 10;
+
+	zinfo->color_table[regno][0] = red;
+	zinfo->color_table[regno][1] = green;
+	zinfo->color_table[regno][2] = blue;
+
+	reg_w(regs, VDAC_ADDRESS_W, regno);
+	reg_w(regs, VDAC_DATA, red);
+	reg_w(regs, VDAC_DATA, green);
+	reg_w(regs, VDAC_DATA, blue);
+
+	return 0;
+}
+
+
+/*
+ *    Read a single color register and split it into
+ *    colors/transparent. Return != 0 for invalid regno.
+ */
+
+static int retz3_getcolreg(unsigned int regno, unsigned int *red,
+			   unsigned int *green, unsigned int *blue,
+			   unsigned int *transp, struct fb_info *info)
+{
+	struct retz3_fb_info *zinfo = retz3info(info);
+	int t;
+
+	if (regno > 255)
+		return 1;
+	t       = zinfo->color_table[regno][0];
+	*red    = (t<<10) | (t<<4) | (t>>2);
+	t       = zinfo->color_table[regno][1];
+	*green  = (t<<10) | (t<<4) | (t>>2);
+	t       = zinfo->color_table[regno][2];
+	*blue   = (t<<10) | (t<<4) | (t>>2);
+	*transp = 0;
+	return 0;
+}
+
+
+static inline void retz3_busy(struct display *p)
+{
+	struct retz3_fb_info *zinfo = retz3info(p->fb_info);
+	volatile unsigned char *acm = zinfo->base + ACM_OFFSET;
+	unsigned char blt_status;
+
+	if (zinfo->blitbusy) {
+		do{
+			blt_status = *((acm) + (ACM_START_STATUS + 2));
+		}while ((blt_status & 1) == 0);
+		zinfo->blitbusy = 0;
+	}
+}
+
+
+static void retz3_bitblt (struct display *p,
+			  unsigned short srcx, unsigned short srcy,
+			  unsigned short destx, unsigned short desty,
+			  unsigned short width, unsigned short height,
+			  unsigned short cmd, unsigned short mask)
+{
+	struct fb_var_screeninfo *var = &p->var;
+	struct retz3_fb_info *zinfo = retz3info(p->fb_info);
+	volatile unsigned long *acm = (unsigned long *)(zinfo->base + ACM_OFFSET);
+	unsigned long *pattern = (unsigned long *)(zinfo->fbmem + PAT_MEM_OFF);
+
+	unsigned short mod;
+	unsigned long tmp;
+	unsigned long pat, src, dst;
+
+	int i, xres_virtual = var->xres_virtual;
+	short bpp = (var->bits_per_pixel & 0xff);
+
+	if (bpp < 8)
+		bpp = 8;
+
+	tmp = mask | (mask << 16);
+
+	retz3_busy(p);
+
+	i = 0;
+	do{
+		*pattern++ = tmp;
+	}while(i++ < bpp/4);
+
+	tmp = cmd << 8;
+	*(acm + ACM_RASTEROP_ROTATION/4) = tmp;
+
+	mod = 0xc0c2;
+
+	pat = 8 * PAT_MEM_OFF;
+	dst = bpp * (destx + desty * xres_virtual);
+
+	/*
+	 * Source is not set for clear.
+	 */
+	if ((cmd != Z3BLTclear) && (cmd != Z3BLTset)) {
+		src = bpp * (srcx + srcy * xres_virtual);
+
+		if (destx > srcx) {
+			mod &= ~0x8000;
+			src += bpp * (width - 1);
+			dst += bpp * (width - 1);
+			pat += bpp * 2;
+		}
+		if (desty > srcy) {
+			mod &= ~0x4000;
+			src += bpp * (height - 1) * xres_virtual;
+			dst += bpp * (height - 1) * xres_virtual;
+			pat += bpp * 4;
+		}
+
+		*(acm + ACM_SOURCE/4) = cpu_to_le32(src);
+	}
+
+	*(acm + ACM_PATTERN/4) = cpu_to_le32(pat);
+
+	*(acm + ACM_DESTINATION/4) = cpu_to_le32(dst);
+
+	tmp = mod << 16;
+	*(acm + ACM_CONTROL/4) = tmp;
+
+	tmp  = width | (height << 16);
+
+	*(acm + ACM_BITMAP_DIMENSION/4) = cpu_to_le32(tmp);
+
+	*(((volatile unsigned char *)acm) + ACM_START_STATUS) = 0x00;
+	*(((volatile unsigned char *)acm) + ACM_START_STATUS) = 0x01;
+	zinfo->blitbusy = 1;
+}
+
+#if 0
+/*
+ * Move cursor to x, y
+ */
+static void retz3_MoveCursor (unsigned short x, unsigned short y)
+{
+	/* Guess we gotta deal with the cursor at some point */
+}
+#endif
+
+
+/*
+ *    Fill the hardware's `par' structure.
+ */
+
+static void retz3fb_get_par(struct fb_info *info, struct retz3fb_par *par)
+{
+	struct retz3_fb_info *zinfo = retz3info(info);
+
+	if (zinfo->current_par_valid)
+		*par = zinfo->current_par;
+	else
+		retz3_decode_var(&retz3fb_default, par);
+}
+
+
+static void retz3fb_set_par(struct fb_info *info, struct retz3fb_par *par)
+{
+	struct retz3_fb_info *zinfo = retz3info(info);
+
+	zinfo->current_par = *par;
+	zinfo->current_par_valid = 1;
+}
+
+
+static int do_fb_set_var(struct fb_info *info,
+			 struct fb_var_screeninfo *var, int isactive)
+{
+	int err, activate;
+	struct retz3fb_par par;
+	struct retz3_fb_info *zinfo = retz3info(info);
+
+	if ((err = retz3_decode_var(var, &par)))
+		return err;
+	activate = var->activate;
+
+	/* XXX ... what to do about isactive ? */
+
+	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW && isactive)
+		retz3fb_set_par(info, &par);
+	retz3_encode_var(var, &par);
+	var->activate = activate;
+
+	retz3_set_video(info, var, &zinfo->current_par);
+
+	return 0;
+}
+
+/*
+ *    Get the Fixed Part of the Display
+ */
+
+static int retz3fb_get_fix(struct fb_fix_screeninfo *fix, int con,
+			   struct fb_info *info)
+{
+	struct retz3fb_par par;
+	int error = 0;
+
+	if (con == -1)
+		retz3fb_get_par(info, &par);
+	else
+		error = retz3_decode_var(&fb_display[con].var, &par);
+	return(error ? error : retz3_encode_fix(info, fix, &par));
+}
+
+
+/*
+ *    Get the User Defined Part of the Display
+ */
+
+static int retz3fb_get_var(struct fb_var_screeninfo *var, int con,
+			   struct fb_info *info)
+{
+	struct retz3fb_par par;
+	int error = 0;
+
+	if (con == -1) {
+		retz3fb_get_par(info, &par);
+		error = retz3_encode_var(var, &par);
+	} else
+		*var = fb_display[con].var;
+	return error;
+}
+
+
+static void retz3fb_set_disp(int con, struct fb_info *info)
+{
+	struct fb_fix_screeninfo fix;
+	struct display *display;
+	struct retz3_fb_info *zinfo = retz3info(info);
+
+	if (con >= 0)
+		display = &fb_display[con];
+	else
+		display = &zinfo->disp;	/* used during initialization */
+
+	retz3fb_get_fix(&fix, con, info);
+
+	if (con == -1)
+		con = 0;
+
+	display->visual = fix.visual;
+	display->type = fix.type;
+	display->type_aux = fix.type_aux;
+	display->ypanstep = fix.ypanstep;
+	display->ywrapstep = fix.ywrapstep;
+	display->can_soft_blank = 1;
+	display->inverse = z3fb_inverse;
+
+	/*
+	 * This seems to be about 20% faster.
+	 */
+	display->scrollmode = SCROLL_YREDRAW;
+
+	switch (display->var.bits_per_pixel) {
+#ifdef FBCON_HAS_CFB8
+	case 8:
+		if (display->var.accel_flags & FB_ACCELF_TEXT) {
+		    display->dispsw = &fbcon_retz3_8;
+		    retz3_set_video(info, &display->var, &zinfo->current_par);
+		} else
+		    display->dispsw = &fbcon_cfb8;
+		break;
+#endif
+#ifdef FBCON_HAS_CFB16
+	case 16:
+		display->dispsw = &fbcon_cfb16;
+		break;
+#endif
+	default:
+		display->dispsw = &fbcon_dummy;
+		break;
+	}
+}
+
+
+/*
+ *    Set the User Defined Part of the Display
+ */
+
+static int retz3fb_set_var(struct fb_var_screeninfo *var, int con,
+			   struct fb_info *info)
+{
+	int err, oldxres, oldyres, oldvxres, oldvyres, oldbpp, oldaccel;
+	struct display *display;
+	struct retz3_fb_info *zinfo = retz3info(info);
+
+	if (con >= 0)
+		display = &fb_display[con];
+	else
+		display = &zinfo->disp;	/* used during initialization */
+
+	if ((err = do_fb_set_var(info, var, con == info->currcon)))
+		return err;
+	if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
+		oldxres = display->var.xres;
+		oldyres = display->var.yres;
+		oldvxres = display->var.xres_virtual;
+		oldvyres = display->var.yres_virtual;
+		oldbpp = display->var.bits_per_pixel;
+		oldaccel = display->var.accel_flags;
+		display->var = *var;
+
+		if (oldxres != var->xres || oldyres != var->yres ||
+		    oldvxres != var->xres_virtual ||
+		    oldvyres != var->yres_virtual ||
+		    oldbpp != var->bits_per_pixel ||
+		    oldaccel != var->accel_flags) {
+
+			struct fb_fix_screeninfo fix;
+			retz3fb_get_fix(&fix, con, info);
+
+			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;
+			display->can_soft_blank = 1;
+			display->inverse = z3fb_inverse;
+			switch (display->var.bits_per_pixel) {
+#ifdef FBCON_HAS_CFB8
+			case 8:
+				if (var->accel_flags & FB_ACCELF_TEXT) {
+					display->dispsw = &fbcon_retz3_8;
+				} else
+					display->dispsw = &fbcon_cfb8;
+				break;
+#endif
+#ifdef FBCON_HAS_CFB16
+			case 16:
+				display->dispsw = &fbcon_cfb16;
+				break;
+#endif
+			default:
+				display->dispsw = &fbcon_dummy;
+				break;
+			}
+			/*
+			 * We still need to find a way to tell the X
+			 * server that the video mem has been fiddled with
+			 * so it redraws the entire screen when switching
+			 * between X and a text console.
+			 */
+			retz3_set_video(info, var, &zinfo->current_par);
+
+			if (info->changevar)
+				(*info->changevar)(con);
+		}
+
+		if (oldbpp != var->bits_per_pixel) {
+			if ((err = fb_alloc_cmap(&display->cmap, 0, 0)))
+				return err;
+			do_install_cmap(con, info);
+		}
+	}
+	return 0;
+}
+
+
+/*
+ *    Get the Colormap
+ */
+
+static int retz3fb_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, retz3_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;
+}
+
+/*
+ *    Blank the display.
+ */
+
+static int retz3fb_blank(int blank, struct fb_info *info)
+{
+	struct retz3_fb_info *zinfo = retz3info(info);
+	volatile unsigned char *regs = retz3info(info)->regs;
+	short i;
+
+	if (blank)
+		for (i = 0; i < 256; i++){
+			reg_w(regs, VDAC_ADDRESS_W, i);
+			reg_w(regs, VDAC_DATA, 0);
+			reg_w(regs, VDAC_DATA, 0);
+			reg_w(regs, VDAC_DATA, 0);
+		}
+	else
+		for (i = 0; i < 256; i++){
+			reg_w(regs, VDAC_ADDRESS_W, i);
+			reg_w(regs, VDAC_DATA, zinfo->color_table[i][0]);
+			reg_w(regs, VDAC_DATA, zinfo->color_table[i][1]);
+			reg_w(regs, VDAC_DATA, zinfo->color_table[i][2]);
+		}
+	return 0;
+}
+
+static struct fb_ops retz3fb_ops = {
+	.owner =	THIS_MODULE,
+	.fb_get_fix =	retz3fb_get_fix,
+	.fb_get_var =	retz3fb_get_var,
+	.fb_set_var =	retz3fb_set_var,
+	.fb_get_cmap =	retz3fb_get_cmap,
+	.fb_set_cmap =	gen_set_cmap,
+	.fb_setcolreg =	retz3fb_setcolreg,
+	.fb_blank =	retz3fb_blank,
+};
+
+int __init retz3fb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt)
+			continue;
+		if (!strcmp(this_opt, "inverse")) {
+			z3fb_inverse = 1;
+			fb_invert_cmaps();
+		} else if (!strncmp(this_opt, "font:", 5)) {
+			strlcpy(fontname, this_opt+5, sizeof(fontname));
+		} else
+			z3fb_mode = get_video_mode(this_opt);
+	}
+	return 0;
+}
+
+
+/*
+ *    Initialization
+ */
+
+int __init retz3fb_init(void)
+{
+	unsigned long board_addr, board_size;
+	struct zorro_dev *z = NULL;
+	volatile unsigned char *regs;
+	struct retz3fb_par par;
+	struct retz3_fb_info *zinfo;
+	struct fb_info *fb_info;
+	short i;
+	int res = -ENXIO;
+
+	while ((z = zorro_find_device(ZORRO_PROD_MACROSYSTEMS_RETINA_Z3, z))) {
+		board_addr = z->resource.start;
+		board_size = z->resource.end-z->resource.start+1;
+		if (!request_mem_region(board_addr, 0x0c00000,
+			    		"ncr77c32blt")) {
+			continue;
+		if (!request_mem_region(board_addr+VIDEO_MEM_OFFSET,
+			    		0x00400000, "RAM"))
+			release_mem_region(board_addr, 0x00c00000);
+			continue;
+		}
+		if (!(zinfo = kmalloc(sizeof(struct retz3_fb_info),
+				      GFP_KERNEL)))
+			return -ENOMEM;
+		memset(zinfo, 0, sizeof(struct retz3_fb_info));
+
+		zinfo->base = ioremap(board_addr, board_size);
+		zinfo->regs = zinfo->base;
+		zinfo->fbmem = zinfo->base + VIDEO_MEM_OFFSET;
+		/* Get memory size - for now we asume it's a 4MB board */
+		zinfo->fbsize = 0x00400000; /* 4 MB */
+		zinfo->physregs = board_addr;
+		zinfo->physfbmem = board_addr + VIDEO_MEM_OFFSET;
+
+		fb_info = fbinfo(zinfo);
+
+		for (i = 0; i < 256; i++){
+			for (i = 0; i < 256; i++){
+				zinfo->color_table[i][0] = i;
+				zinfo->color_table[i][1] = i;
+				zinfo->color_table[i][2] = i;
+			}
+		}
+
+		regs = zinfo->regs;
+		/* Disable hardware cursor */
+		seq_w(regs, SEQ_CURSOR_Y_INDEX, 0x00);
+
+		retz3fb_setcolreg (255, 56<<8, 100<<8, 160<<8, 0, fb_info);
+		retz3fb_setcolreg (254, 0, 0, 0, 0, fb_info);
+
+		strcpy(fb_info->modename, retz3fb_name);
+		fb_info->changevar = NULL;
+		fb_info->fbops = &retz3fb_ops;
+		fb_info->screen_base = zinfo->fbmem;
+		fb_info->disp = &zinfo->disp;
+		fb_info->currcon = -1;
+		fb_info->switch_con = &z3fb_switch;
+		fb_info->updatevar = &z3fb_updatevar;
+		fb_info->flags = FBINFO_FLAG_DEFAULT;
+		strlcpy(fb_info->fontname, fontname, sizeof(fb_info->fontname));
+
+		if (z3fb_mode == -1)
+			retz3fb_default = retz3fb_predefined[0].var;
+
+		retz3_decode_var(&retz3fb_default, &par);
+		retz3_encode_var(&retz3fb_default, &par);
+
+		do_fb_set_var(fb_info, &retz3fb_default, 0);
+		retz3fb_get_var(&zinfo->disp.var, -1, fb_info);
+
+		retz3fb_set_disp(-1, fb_info);
+
+		do_install_cmap(0, fb_info);
+
+		if (register_framebuffer(fb_info) < 0)
+			return -EINVAL;
+
+		printk(KERN_INFO "fb%d: %s frame buffer device, using %ldK of "
+		       "video memory\n", fb_info->node,
+		       fb_info->modename, zinfo->fbsize>>10);
+
+		/* FIXME: This driver cannot be unloaded yet */
+		res = 0;
+	}
+	return res;
+}
+
+
+static int z3fb_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,
+			    retz3_getcolreg, info);
+
+	do_fb_set_var(info, &fb_display[con].var, 1);
+	info->currcon = con;
+	/* Install new colormap */
+	do_install_cmap(con, info);
+	return 0;
+}
+
+
+/*
+ *    Update the `var' structure (called by fbcon.c)
+ *
+ *    This call looks only at yoffset and the FB_VMODE_YWRAP flag in `var'.
+ *    Since it's called by a kernel driver, no range checking is done.
+ */
+
+static int z3fb_updatevar(int con, struct fb_info *info)
+{
+	return 0;
+}
+
+/*
+ *    Get a Video Mode
+ */
+
+static int __init get_video_mode(const char *name)
+{
+	short i;
+
+	for (i = 0; i < NUM_TOTAL_MODES; i++)
+		if (!strcmp(name, retz3fb_predefined[i].name)){
+			retz3fb_default = retz3fb_predefined[i].var;
+			return i;
+		}
+	return -1;
+}
+
+
+#ifdef MODULE
+MODULE_LICENSE("GPL");
+
+int init_module(void)
+{
+	return retz3fb_init();
+}
+#endif
+
+
+/*
+ *  Text console acceleration
+ */
+
+#ifdef FBCON_HAS_CFB8
+static void retz3_8_bmove(struct display *p, int sy, int sx,
+			  int dy, int dx, int height, int width)
+{
+	int fontwidth = fontwidth(p);
+
+	sx *= fontwidth;
+	dx *= fontwidth;
+	width *= fontwidth;
+
+	retz3_bitblt(p,
+		     (unsigned short)sx,
+		     (unsigned short)(sy*fontheight(p)),
+		     (unsigned short)dx,
+		     (unsigned short)(dy*fontheight(p)),
+		     (unsigned short)width,
+		     (unsigned short)(height*fontheight(p)),
+		     Z3BLTcopy,
+		     0xffff);
+}
+
+static void retz3_8_clear(struct vc_data *conp, struct display *p,
+			  int sy, int sx, int height, int width)
+{
+	unsigned short col;
+	int fontwidth = fontwidth(p);
+
+	sx *= fontwidth;
+	width *= fontwidth;
+
+	col = attr_bgcol_ec(p, conp);
+	col &= 0xff;
+	col |= (col << 8);
+
+	retz3_bitblt(p,
+		     (unsigned short)sx,
+		     (unsigned short)(sy*fontheight(p)),
+		     (unsigned short)sx,
+		     (unsigned short)(sy*fontheight(p)),
+		     (unsigned short)width,
+		     (unsigned short)(height*fontheight(p)),
+		     Z3BLTset,
+		     col);
+}
+
+
+static void retz3_putc(struct vc_data *conp, struct display *p, int c,
+		       int yy, int xx)
+{
+	retz3_busy(p);
+	fbcon_cfb8_putc(conp, p, c, yy, xx);
+}
+
+
+static void retz3_putcs(struct vc_data *conp, struct display *p,
+			const unsigned short *s, int count,
+			int yy, int xx)
+{
+	retz3_busy(p);
+	fbcon_cfb8_putcs(conp, p, s, count, yy, xx);
+}
+
+
+static void retz3_revc(struct display *p, int xx, int yy)
+{
+	retz3_busy(p);
+	fbcon_cfb8_revc(p, xx, yy);
+}
+
+
+static void retz3_clear_margins(struct vc_data* conp, struct display* p,
+				int bottom_only)
+{
+	retz3_busy(p);
+	fbcon_cfb8_clear_margins(conp, p, bottom_only);
+}
+
+
+static struct display_switch fbcon_retz3_8 = {
+	.setup		= fbcon_cfb8_setup,
+	.bmove		= retz3_8_bmove,
+	.clear		= retz3_8_clear,
+	.putc		= retz3_putc,
+	.putcs		= retz3_putcs,
+	.revc		= retz3_revc,
+	.clear_margins	= retz3_clear_margins,
+	.fontwidthmask	= FONTWIDTH(8)
+};
+#endif
-- 
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