Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1903 insertions, 0 deletions

diff --git a/drivers/video/fbdev/cyber2000fb.c b/drivers/video/fbdev/cyber2000fb.c
new file mode 100644
index 000000000..31ff1da82
--- /dev/null
+++ b/drivers/video/fbdev/cyber2000fb.c
@@ -0,0 +1,1903 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  linux/drivers/video/cyber2000fb.c
+ *
+ *  Copyright (C) 1998-2002 Russell King
+ *
+ *  MIPS and 50xx clock support
+ *  Copyright (C) 2001 Bradley D. LaRonde <brad@ltc.com>
+ *
+ *  32 bit support, text color and panning fixes for modes != 8 bit
+ *  Copyright (C) 2002 Denis Oliver Kropp <dok@directfb.org>
+ *
+ * Integraphics CyberPro 2000, 2010 and 5000 frame buffer device
+ *
+ * Based on cyberfb.c.
+ *
+ * Note that we now use the new fbcon fix, var and cmap scheme.  We do
+ * still have to check which console is the currently displayed one
+ * however, especially for the colourmap stuff.
+ *
+ * We also use the new hotplug PCI subsystem.  I'm not sure if there
+ * are any such cards, but I'm erring on the side of caution.  We don't
+ * want to go pop just because someone does have one.
+ *
+ * Note that this doesn't work fully in the case of multiple CyberPro
+ * cards with grabbers.  We currently can only attach to the first
+ * CyberPro card found.
+ *
+ * When we're in truecolour mode, we power down the LUT RAM as a power
+ * saving feature.  Also, when we enter any of the powersaving modes
+ * (except soft blanking) we power down the RAMDACs.  This saves about
+ * 1W, which is roughly 8% of the power consumption of a NetWinder
+ * (which, incidentally, is about the same saving as a 2.5in hard disk
+ * entering standby mode.)
+ */
+#include <linux/aperture.h>
+#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/fb.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/i2c.h>
+#include <linux/i2c-algo-bit.h>
+
+
+#ifdef __arm__
+#include <asm/mach-types.h>
+#endif
+
+#include "cyber2000fb.h"
+
+struct cfb_info {
+	struct fb_info		fb;
+	struct display_switch	*dispsw;
+	unsigned char		__iomem *region;
+	unsigned char		__iomem *regs;
+	u_int			id;
+	u_int			irq;
+	int			func_use_count;
+	u_long			ref_ps;
+
+	/*
+	 * Clock divisors
+	 */
+	u_int			divisors[4];
+
+	struct {
+		u8 red, green, blue;
+	} palette[NR_PALETTE];
+
+	u_char			mem_ctl1;
+	u_char			mem_ctl2;
+	u_char			mclk_mult;
+	u_char			mclk_div;
+	/*
+	 * RAMDAC control register is both of these or'ed together
+	 */
+	u_char			ramdac_ctrl;
+	u_char			ramdac_powerdown;
+
+	u32			pseudo_palette[16];
+
+	spinlock_t		reg_b0_lock;
+
+#ifdef CONFIG_FB_CYBER2000_DDC
+	bool			ddc_registered;
+	struct i2c_adapter	ddc_adapter;
+	struct i2c_algo_bit_data	ddc_algo;
+#endif
+
+#ifdef CONFIG_FB_CYBER2000_I2C
+	struct i2c_adapter	i2c_adapter;
+	struct i2c_algo_bit_data i2c_algo;
+#endif
+};
+
+static char *default_font = "Acorn8x8";
+module_param(default_font, charp, 0);
+MODULE_PARM_DESC(default_font, "Default font name");
+
+/*
+ * Our access methods.
+ */
+#define cyber2000fb_writel(val, reg, cfb)	writel(val, (cfb)->regs + (reg))
+#define cyber2000fb_writew(val, reg, cfb)	writew(val, (cfb)->regs + (reg))
+#define cyber2000fb_writeb(val, reg, cfb)	writeb(val, (cfb)->regs + (reg))
+
+#define cyber2000fb_readb(reg, cfb)		readb((cfb)->regs + (reg))
+
+static inline void
+cyber2000_crtcw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
+{
+	cyber2000fb_writew((reg & 255) | val << 8, 0x3d4, cfb);
+}
+
+static inline void
+cyber2000_grphw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
+{
+	cyber2000fb_writew((reg & 255) | val << 8, 0x3ce, cfb);
+}
+
+static inline unsigned int
+cyber2000_grphr(unsigned int reg, struct cfb_info *cfb)
+{
+	cyber2000fb_writeb(reg, 0x3ce, cfb);
+	return cyber2000fb_readb(0x3cf, cfb);
+}
+
+static inline void
+cyber2000_attrw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
+{
+	cyber2000fb_readb(0x3da, cfb);
+	cyber2000fb_writeb(reg, 0x3c0, cfb);
+	cyber2000fb_readb(0x3c1, cfb);
+	cyber2000fb_writeb(val, 0x3c0, cfb);
+}
+
+static inline void
+cyber2000_seqw(unsigned int reg, unsigned int val, struct cfb_info *cfb)
+{
+	cyber2000fb_writew((reg & 255) | val << 8, 0x3c4, cfb);
+}
+
+/* -------------------- Hardware specific routines ------------------------- */
+
+/*
+ * Hardware Cyber2000 Acceleration
+ */
+static void
+cyber2000fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	unsigned long dst, col;
+
+	if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
+		cfb_fillrect(info, rect);
+		return;
+	}
+
+	cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
+	cyber2000fb_writew(rect->width - 1, CO_REG_PIXWIDTH, cfb);
+	cyber2000fb_writew(rect->height - 1, CO_REG_PIXHEIGHT, cfb);
+
+	col = rect->color;
+	if (cfb->fb.var.bits_per_pixel > 8)
+		col = ((u32 *)cfb->fb.pseudo_palette)[col];
+	cyber2000fb_writel(col, CO_REG_FGCOLOUR, cfb);
+
+	dst = rect->dx + rect->dy * cfb->fb.var.xres_virtual;
+	if (cfb->fb.var.bits_per_pixel == 24) {
+		cyber2000fb_writeb(dst, CO_REG_X_PHASE, cfb);
+		dst *= 3;
+	}
+
+	cyber2000fb_writel(dst, CO_REG_DEST_PTR, cfb);
+	cyber2000fb_writeb(CO_FG_MIX_SRC, CO_REG_FGMIX, cfb);
+	cyber2000fb_writew(CO_CMD_L_PATTERN_FGCOL, CO_REG_CMD_L, cfb);
+	cyber2000fb_writew(CO_CMD_H_BLITTER, CO_REG_CMD_H, cfb);
+}
+
+static void
+cyber2000fb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	unsigned int cmd = CO_CMD_L_PATTERN_FGCOL;
+	unsigned long src, dst;
+
+	if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT)) {
+		cfb_copyarea(info, region);
+		return;
+	}
+
+	cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
+	cyber2000fb_writew(region->width - 1, CO_REG_PIXWIDTH, cfb);
+	cyber2000fb_writew(region->height - 1, CO_REG_PIXHEIGHT, cfb);
+
+	src = region->sx + region->sy * cfb->fb.var.xres_virtual;
+	dst = region->dx + region->dy * cfb->fb.var.xres_virtual;
+
+	if (region->sx < region->dx) {
+		src += region->width - 1;
+		dst += region->width - 1;
+		cmd |= CO_CMD_L_INC_LEFT;
+	}
+
+	if (region->sy < region->dy) {
+		src += (region->height - 1) * cfb->fb.var.xres_virtual;
+		dst += (region->height - 1) * cfb->fb.var.xres_virtual;
+		cmd |= CO_CMD_L_INC_UP;
+	}
+
+	if (cfb->fb.var.bits_per_pixel == 24) {
+		cyber2000fb_writeb(dst, CO_REG_X_PHASE, cfb);
+		src *= 3;
+		dst *= 3;
+	}
+	cyber2000fb_writel(src, CO_REG_SRC1_PTR, cfb);
+	cyber2000fb_writel(dst, CO_REG_DEST_PTR, cfb);
+	cyber2000fb_writew(CO_FG_MIX_SRC, CO_REG_FGMIX, cfb);
+	cyber2000fb_writew(cmd, CO_REG_CMD_L, cfb);
+	cyber2000fb_writew(CO_CMD_H_FGSRCMAP | CO_CMD_H_BLITTER,
+			   CO_REG_CMD_H, cfb);
+}
+
+static void
+cyber2000fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	cfb_imageblit(info, image);
+	return;
+}
+
+static int cyber2000fb_sync(struct fb_info *info)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	int count = 100000;
+
+	if (!(cfb->fb.var.accel_flags & FB_ACCELF_TEXT))
+		return 0;
+
+	while (cyber2000fb_readb(CO_REG_CONTROL, cfb) & CO_CTRL_BUSY) {
+		if (!count--) {
+			debug_printf("accel_wait timed out\n");
+			cyber2000fb_writeb(0, CO_REG_CONTROL, cfb);
+			break;
+		}
+		udelay(1);
+	}
+	return 0;
+}
+
+/*
+ * ===========================================================================
+ */
+
+static inline u32 convert_bitfield(u_int val, struct fb_bitfield *bf)
+{
+	u_int mask = (1 << bf->length) - 1;
+
+	return (val >> (16 - bf->length) & mask) << bf->offset;
+}
+
+/*
+ *    Set a single color register. Return != 0 for invalid regno.
+ */
+static int
+cyber2000fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+		      u_int transp, struct fb_info *info)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	struct fb_var_screeninfo *var = &cfb->fb.var;
+	u32 pseudo_val;
+	int ret = 1;
+
+	switch (cfb->fb.fix.visual) {
+	default:
+		return 1;
+
+	/*
+	 * Pseudocolour:
+	 *	   8     8
+	 * pixel --/--+--/-->  red lut  --> red dac
+	 *	      |  8
+	 *	      +--/--> green lut --> green dac
+	 *	      |  8
+	 *	      +--/-->  blue lut --> blue dac
+	 */
+	case FB_VISUAL_PSEUDOCOLOR:
+		if (regno >= NR_PALETTE)
+			return 1;
+
+		red >>= 8;
+		green >>= 8;
+		blue >>= 8;
+
+		cfb->palette[regno].red = red;
+		cfb->palette[regno].green = green;
+		cfb->palette[regno].blue = blue;
+
+		cyber2000fb_writeb(regno, 0x3c8, cfb);
+		cyber2000fb_writeb(red, 0x3c9, cfb);
+		cyber2000fb_writeb(green, 0x3c9, cfb);
+		cyber2000fb_writeb(blue, 0x3c9, cfb);
+		return 0;
+
+	/*
+	 * Direct colour:
+	 *	   n     rl
+	 * pixel --/--+--/-->  red lut  --> red dac
+	 *	      |  gl
+	 *	      +--/--> green lut --> green dac
+	 *	      |  bl
+	 *	      +--/-->  blue lut --> blue dac
+	 * n = bpp, rl = red length, gl = green length, bl = blue length
+	 */
+	case FB_VISUAL_DIRECTCOLOR:
+		red >>= 8;
+		green >>= 8;
+		blue >>= 8;
+
+		if (var->green.length == 6 && regno < 64) {
+			cfb->palette[regno << 2].green = green;
+
+			/*
+			 * The 6 bits of the green component are applied
+			 * to the high 6 bits of the LUT.
+			 */
+			cyber2000fb_writeb(regno << 2, 0x3c8, cfb);
+			cyber2000fb_writeb(cfb->palette[regno >> 1].red,
+					   0x3c9, cfb);
+			cyber2000fb_writeb(green, 0x3c9, cfb);
+			cyber2000fb_writeb(cfb->palette[regno >> 1].blue,
+					   0x3c9, cfb);
+
+			green = cfb->palette[regno << 3].green;
+
+			ret = 0;
+		}
+
+		if (var->green.length >= 5 && regno < 32) {
+			cfb->palette[regno << 3].red = red;
+			cfb->palette[regno << 3].green = green;
+			cfb->palette[regno << 3].blue = blue;
+
+			/*
+			 * The 5 bits of each colour component are
+			 * applied to the high 5 bits of the LUT.
+			 */
+			cyber2000fb_writeb(regno << 3, 0x3c8, cfb);
+			cyber2000fb_writeb(red, 0x3c9, cfb);
+			cyber2000fb_writeb(green, 0x3c9, cfb);
+			cyber2000fb_writeb(blue, 0x3c9, cfb);
+			ret = 0;
+		}
+
+		if (var->green.length == 4 && regno < 16) {
+			cfb->palette[regno << 4].red = red;
+			cfb->palette[regno << 4].green = green;
+			cfb->palette[regno << 4].blue = blue;
+
+			/*
+			 * The 5 bits of each colour component are
+			 * applied to the high 5 bits of the LUT.
+			 */
+			cyber2000fb_writeb(regno << 4, 0x3c8, cfb);
+			cyber2000fb_writeb(red, 0x3c9, cfb);
+			cyber2000fb_writeb(green, 0x3c9, cfb);
+			cyber2000fb_writeb(blue, 0x3c9, cfb);
+			ret = 0;
+		}
+
+		/*
+		 * Since this is only used for the first 16 colours, we
+		 * don't have to care about overflowing for regno >= 32
+		 */
+		pseudo_val = regno << var->red.offset |
+			     regno << var->green.offset |
+			     regno << var->blue.offset;
+		break;
+
+	/*
+	 * True colour:
+	 *	   n     rl
+	 * pixel --/--+--/--> red dac
+	 *	      |  gl
+	 *	      +--/--> green dac
+	 *	      |  bl
+	 *	      +--/--> blue dac
+	 * n = bpp, rl = red length, gl = green length, bl = blue length
+	 */
+	case FB_VISUAL_TRUECOLOR:
+		pseudo_val = convert_bitfield(transp ^ 0xffff, &var->transp);
+		pseudo_val |= convert_bitfield(red, &var->red);
+		pseudo_val |= convert_bitfield(green, &var->green);
+		pseudo_val |= convert_bitfield(blue, &var->blue);
+		ret = 0;
+		break;
+	}
+
+	/*
+	 * Now set our pseudo palette for the CFB16/24/32 drivers.
+	 */
+	if (regno < 16)
+		((u32 *)cfb->fb.pseudo_palette)[regno] = pseudo_val;
+
+	return ret;
+}
+
+struct par_info {
+	/*
+	 * Hardware
+	 */
+	u_char	clock_mult;
+	u_char	clock_div;
+	u_char	extseqmisc;
+	u_char	co_pixfmt;
+	u_char	crtc_ofl;
+	u_char	crtc[19];
+	u_int	width;
+	u_int	pitch;
+	u_int	fetch;
+
+	/*
+	 * Other
+	 */
+	u_char	ramdac;
+};
+
+static const u_char crtc_idx[] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+	0x08, 0x09,
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18
+};
+
+static void cyber2000fb_write_ramdac_ctrl(struct cfb_info *cfb)
+{
+	unsigned int i;
+	unsigned int val = cfb->ramdac_ctrl | cfb->ramdac_powerdown;
+
+	cyber2000fb_writeb(0x56, 0x3ce, cfb);
+	i = cyber2000fb_readb(0x3cf, cfb);
+	cyber2000fb_writeb(i | 4, 0x3cf, cfb);
+	cyber2000fb_writeb(val, 0x3c6, cfb);
+	cyber2000fb_writeb(i, 0x3cf, cfb);
+	/* prevent card lock-up observed on x86 with CyberPro 2000 */
+	cyber2000fb_readb(0x3cf, cfb);
+}
+
+static void cyber2000fb_set_timing(struct cfb_info *cfb, struct par_info *hw)
+{
+	u_int i;
+
+	/*
+	 * Blank palette
+	 */
+	for (i = 0; i < NR_PALETTE; i++) {
+		cyber2000fb_writeb(i, 0x3c8, cfb);
+		cyber2000fb_writeb(0, 0x3c9, cfb);
+		cyber2000fb_writeb(0, 0x3c9, cfb);
+		cyber2000fb_writeb(0, 0x3c9, cfb);
+	}
+
+	cyber2000fb_writeb(0xef, 0x3c2, cfb);
+	cyber2000_crtcw(0x11, 0x0b, cfb);
+	cyber2000_attrw(0x11, 0x00, cfb);
+
+	cyber2000_seqw(0x00, 0x01, cfb);
+	cyber2000_seqw(0x01, 0x01, cfb);
+	cyber2000_seqw(0x02, 0x0f, cfb);
+	cyber2000_seqw(0x03, 0x00, cfb);
+	cyber2000_seqw(0x04, 0x0e, cfb);
+	cyber2000_seqw(0x00, 0x03, cfb);
+
+	for (i = 0; i < sizeof(crtc_idx); i++)
+		cyber2000_crtcw(crtc_idx[i], hw->crtc[i], cfb);
+
+	for (i = 0x0a; i < 0x10; i++)
+		cyber2000_crtcw(i, 0, cfb);
+
+	cyber2000_grphw(EXT_CRT_VRTOFL, hw->crtc_ofl, cfb);
+	cyber2000_grphw(0x00, 0x00, cfb);
+	cyber2000_grphw(0x01, 0x00, cfb);
+	cyber2000_grphw(0x02, 0x00, cfb);
+	cyber2000_grphw(0x03, 0x00, cfb);
+	cyber2000_grphw(0x04, 0x00, cfb);
+	cyber2000_grphw(0x05, 0x60, cfb);
+	cyber2000_grphw(0x06, 0x05, cfb);
+	cyber2000_grphw(0x07, 0x0f, cfb);
+	cyber2000_grphw(0x08, 0xff, cfb);
+
+	/* Attribute controller registers */
+	for (i = 0; i < 16; i++)
+		cyber2000_attrw(i, i, cfb);
+
+	cyber2000_attrw(0x10, 0x01, cfb);
+	cyber2000_attrw(0x11, 0x00, cfb);
+	cyber2000_attrw(0x12, 0x0f, cfb);
+	cyber2000_attrw(0x13, 0x00, cfb);
+	cyber2000_attrw(0x14, 0x00, cfb);
+
+	/* PLL registers */
+	spin_lock(&cfb->reg_b0_lock);
+	cyber2000_grphw(EXT_DCLK_MULT, hw->clock_mult, cfb);
+	cyber2000_grphw(EXT_DCLK_DIV, hw->clock_div, cfb);
+	cyber2000_grphw(EXT_MCLK_MULT, cfb->mclk_mult, cfb);
+	cyber2000_grphw(EXT_MCLK_DIV, cfb->mclk_div, cfb);
+	cyber2000_grphw(0x90, 0x01, cfb);
+	cyber2000_grphw(0xb9, 0x80, cfb);
+	cyber2000_grphw(0xb9, 0x00, cfb);
+	spin_unlock(&cfb->reg_b0_lock);
+
+	cfb->ramdac_ctrl = hw->ramdac;
+	cyber2000fb_write_ramdac_ctrl(cfb);
+
+	cyber2000fb_writeb(0x20, 0x3c0, cfb);
+	cyber2000fb_writeb(0xff, 0x3c6, cfb);
+
+	cyber2000_grphw(0x14, hw->fetch, cfb);
+	cyber2000_grphw(0x15, ((hw->fetch >> 8) & 0x03) |
+			      ((hw->pitch >> 4) & 0x30), cfb);
+	cyber2000_grphw(EXT_SEQ_MISC, hw->extseqmisc, cfb);
+
+	/*
+	 * Set up accelerator registers
+	 */
+	cyber2000fb_writew(hw->width, CO_REG_SRC_WIDTH, cfb);
+	cyber2000fb_writew(hw->width, CO_REG_DEST_WIDTH, cfb);
+	cyber2000fb_writeb(hw->co_pixfmt, CO_REG_PIXFMT, cfb);
+}
+
+static inline int
+cyber2000fb_update_start(struct cfb_info *cfb, struct fb_var_screeninfo *var)
+{
+	u_int base = var->yoffset * var->xres_virtual + var->xoffset;
+
+	base *= var->bits_per_pixel;
+
+	/*
+	 * Convert to bytes and shift two extra bits because DAC
+	 * can only start on 4 byte aligned data.
+	 */
+	base >>= 5;
+
+	if (base >= 1 << 20)
+		return -EINVAL;
+
+	cyber2000_grphw(0x10, base >> 16 | 0x10, cfb);
+	cyber2000_crtcw(0x0c, base >> 8, cfb);
+	cyber2000_crtcw(0x0d, base, cfb);
+
+	return 0;
+}
+
+static int
+cyber2000fb_decode_crtc(struct par_info *hw, struct cfb_info *cfb,
+			struct fb_var_screeninfo *var)
+{
+	u_int Htotal, Hblankend, Hsyncend;
+	u_int Vtotal, Vdispend, Vblankstart, Vblankend, Vsyncstart, Vsyncend;
+#define ENCODE_BIT(v, b1, m, b2) ((((v) >> (b1)) & (m)) << (b2))
+
+	hw->crtc[13] = hw->pitch;
+	hw->crtc[17] = 0xe3;
+	hw->crtc[14] = 0;
+	hw->crtc[8]  = 0;
+
+	Htotal     = var->xres + var->right_margin +
+		     var->hsync_len + var->left_margin;
+
+	if (Htotal > 2080)
+		return -EINVAL;
+
+	hw->crtc[0] = (Htotal >> 3) - 5;
+	hw->crtc[1] = (var->xres >> 3) - 1;
+	hw->crtc[2] = var->xres >> 3;
+	hw->crtc[4] = (var->xres + var->right_margin) >> 3;
+
+	Hblankend   = (Htotal - 4 * 8) >> 3;
+
+	hw->crtc[3] = ENCODE_BIT(Hblankend,  0, 0x1f,  0) |
+		      ENCODE_BIT(1,          0, 0x01,  7);
+
+	Hsyncend    = (var->xres + var->right_margin + var->hsync_len) >> 3;
+
+	hw->crtc[5] = ENCODE_BIT(Hsyncend,   0, 0x1f,  0) |
+		      ENCODE_BIT(Hblankend,  5, 0x01,  7);
+
+	Vdispend    = var->yres - 1;
+	Vsyncstart  = var->yres + var->lower_margin;
+	Vsyncend    = var->yres + var->lower_margin + var->vsync_len;
+	Vtotal      = var->yres + var->lower_margin + var->vsync_len +
+		      var->upper_margin - 2;
+
+	if (Vtotal > 2047)
+		return -EINVAL;
+
+	Vblankstart = var->yres + 6;
+	Vblankend   = Vtotal - 10;
+
+	hw->crtc[6]  = Vtotal;
+	hw->crtc[7]  = ENCODE_BIT(Vtotal,     8, 0x01,  0) |
+			ENCODE_BIT(Vdispend,   8, 0x01,  1) |
+			ENCODE_BIT(Vsyncstart, 8, 0x01,  2) |
+			ENCODE_BIT(Vblankstart, 8, 0x01,  3) |
+			ENCODE_BIT(1,          0, 0x01,  4) |
+			ENCODE_BIT(Vtotal,     9, 0x01,  5) |
+			ENCODE_BIT(Vdispend,   9, 0x01,  6) |
+			ENCODE_BIT(Vsyncstart, 9, 0x01,  7);
+	hw->crtc[9]  = ENCODE_BIT(0,          0, 0x1f,  0) |
+			ENCODE_BIT(Vblankstart, 9, 0x01,  5) |
+			ENCODE_BIT(1,          0, 0x01,  6);
+	hw->crtc[10] = Vsyncstart;
+	hw->crtc[11] = ENCODE_BIT(Vsyncend,   0, 0x0f,  0) |
+		       ENCODE_BIT(1,          0, 0x01,  7);
+	hw->crtc[12] = Vdispend;
+	hw->crtc[15] = Vblankstart;
+	hw->crtc[16] = Vblankend;
+	hw->crtc[18] = 0xff;
+
+	/*
+	 * overflow - graphics reg 0x11
+	 * 0=VTOTAL:10 1=VDEND:10 2=VRSTART:10 3=VBSTART:10
+	 * 4=LINECOMP:10 5-IVIDEO 6=FIXCNT
+	 */
+	hw->crtc_ofl =
+		ENCODE_BIT(Vtotal, 10, 0x01, 0) |
+		ENCODE_BIT(Vdispend, 10, 0x01, 1) |
+		ENCODE_BIT(Vsyncstart, 10, 0x01, 2) |
+		ENCODE_BIT(Vblankstart, 10, 0x01, 3) |
+		EXT_CRT_VRTOFL_LINECOMP10;
+
+	/* woody: set the interlaced bit... */
+	/* FIXME: what about doublescan? */
+	if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED)
+		hw->crtc_ofl |= EXT_CRT_VRTOFL_INTERLACE;
+
+	return 0;
+}
+
+/*
+ * The following was discovered by a good monitor, bit twiddling, theorising
+ * and but mostly luck.  Strangely, it looks like everyone elses' PLL!
+ *
+ * Clock registers:
+ *   fclock = fpll / div2
+ *   fpll   = fref * mult / div1
+ * where:
+ *   fref = 14.318MHz (69842ps)
+ *   mult = reg0xb0.7:0
+ *   div1 = (reg0xb1.5:0 + 1)
+ *   div2 =  2^(reg0xb1.7:6)
+ *   fpll should be between 115 and 260 MHz
+ *  (8696ps and 3846ps)
+ */
+static int
+cyber2000fb_decode_clock(struct par_info *hw, struct cfb_info *cfb,
+			 struct fb_var_screeninfo *var)
+{
+	u_long pll_ps = var->pixclock;
+	const u_long ref_ps = cfb->ref_ps;
+	u_int div2, t_div1, best_div1, best_mult;
+	int best_diff;
+	int vco;
+
+	/*
+	 * Step 1:
+	 *   find div2 such that 115MHz < fpll < 260MHz
+	 *   and 0 <= div2 < 4
+	 */
+	for (div2 = 0; div2 < 4; div2++) {
+		u_long new_pll;
+
+		new_pll = pll_ps / cfb->divisors[div2];
+		if (8696 > new_pll && new_pll > 3846) {
+			pll_ps = new_pll;
+			break;
+		}
+	}
+
+	if (div2 == 4)
+		return -EINVAL;
+
+	/*
+	 * Step 2:
+	 *  Given pll_ps and ref_ps, find:
+	 *    pll_ps * 0.995 < pll_ps_calc < pll_ps * 1.005
+	 *  where { 1 < best_div1 < 32, 1 < best_mult < 256 }
+	 *    pll_ps_calc = best_div1 / (ref_ps * best_mult)
+	 */
+	best_diff = 0x7fffffff;
+	best_mult = 2;
+	best_div1 = 32;
+	for (t_div1 = 2; t_div1 < 32; t_div1 += 1) {
+		u_int rr, t_mult, t_pll_ps;
+		int diff;
+
+		/*
+		 * Find the multiplier for this divisor
+		 */
+		rr = ref_ps * t_div1;
+		t_mult = (rr + pll_ps / 2) / pll_ps;
+
+		/*
+		 * Is the multiplier within the correct range?
+		 */
+		if (t_mult > 256 || t_mult < 2)
+			continue;
+
+		/*
+		 * Calculate the actual clock period from this multiplier
+		 * and divisor, and estimate the error.
+		 */
+		t_pll_ps = (rr + t_mult / 2) / t_mult;
+		diff = pll_ps - t_pll_ps;
+		if (diff < 0)
+			diff = -diff;
+
+		if (diff < best_diff) {
+			best_diff = diff;
+			best_mult = t_mult;
+			best_div1 = t_div1;
+		}
+
+		/*
+		 * If we hit an exact value, there is no point in continuing.
+		 */
+		if (diff == 0)
+			break;
+	}
+
+	/*
+	 * Step 3:
+	 *  combine values
+	 */
+	hw->clock_mult = best_mult - 1;
+	hw->clock_div  = div2 << 6 | (best_div1 - 1);
+
+	vco = ref_ps * best_div1 / best_mult;
+	if ((ref_ps == 40690) && (vco < 5556))
+		/* Set VFSEL when VCO > 180MHz (5.556 ps). */
+		hw->clock_div |= EXT_DCLK_DIV_VFSEL;
+
+	return 0;
+}
+
+/*
+ *    Set the User Defined Part of the Display
+ */
+static int
+cyber2000fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	struct par_info hw;
+	unsigned int mem;
+	int err;
+
+	var->transp.msb_right	= 0;
+	var->red.msb_right	= 0;
+	var->green.msb_right	= 0;
+	var->blue.msb_right	= 0;
+	var->transp.offset	= 0;
+	var->transp.length	= 0;
+
+	switch (var->bits_per_pixel) {
+	case 8:	/* PSEUDOCOLOUR, 256 */
+		var->red.offset		= 0;
+		var->red.length		= 8;
+		var->green.offset	= 0;
+		var->green.length	= 8;
+		var->blue.offset	= 0;
+		var->blue.length	= 8;
+		break;
+
+	case 16:/* DIRECTCOLOUR, 64k or 32k */
+		switch (var->green.length) {
+		case 6: /* RGB565, 64k */
+			var->red.offset		= 11;
+			var->red.length		= 5;
+			var->green.offset	= 5;
+			var->green.length	= 6;
+			var->blue.offset	= 0;
+			var->blue.length	= 5;
+			break;
+
+		default:
+		case 5: /* RGB555, 32k */
+			var->red.offset		= 10;
+			var->red.length		= 5;
+			var->green.offset	= 5;
+			var->green.length	= 5;
+			var->blue.offset	= 0;
+			var->blue.length	= 5;
+			break;
+
+		case 4: /* RGB444, 4k + transparency? */
+			var->transp.offset	= 12;
+			var->transp.length	= 4;
+			var->red.offset		= 8;
+			var->red.length		= 4;
+			var->green.offset	= 4;
+			var->green.length	= 4;
+			var->blue.offset	= 0;
+			var->blue.length	= 4;
+			break;
+		}
+		break;
+
+	case 24:/* TRUECOLOUR, 16m */
+		var->red.offset		= 16;
+		var->red.length		= 8;
+		var->green.offset	= 8;
+		var->green.length	= 8;
+		var->blue.offset	= 0;
+		var->blue.length	= 8;
+		break;
+
+	case 32:/* TRUECOLOUR, 16m */
+		var->transp.offset	= 24;
+		var->transp.length	= 8;
+		var->red.offset		= 16;
+		var->red.length		= 8;
+		var->green.offset	= 8;
+		var->green.length	= 8;
+		var->blue.offset	= 0;
+		var->blue.length	= 8;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	mem = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel / 8);
+	if (mem > cfb->fb.fix.smem_len)
+		var->yres_virtual = cfb->fb.fix.smem_len * 8 /
+				    (var->bits_per_pixel * var->xres_virtual);
+
+	if (var->yres > var->yres_virtual)
+		var->yres = var->yres_virtual;
+	if (var->xres > var->xres_virtual)
+		var->xres = var->xres_virtual;
+
+	err = cyber2000fb_decode_clock(&hw, cfb, var);
+	if (err)
+		return err;
+
+	err = cyber2000fb_decode_crtc(&hw, cfb, var);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int cyber2000fb_set_par(struct fb_info *info)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	struct fb_var_screeninfo *var = &cfb->fb.var;
+	struct par_info hw;
+	unsigned int mem;
+
+	hw.width = var->xres_virtual;
+	hw.ramdac = RAMDAC_VREFEN | RAMDAC_DAC8BIT;
+
+	switch (var->bits_per_pixel) {
+	case 8:
+		hw.co_pixfmt		= CO_PIXFMT_8BPP;
+		hw.pitch		= hw.width >> 3;
+		hw.extseqmisc		= EXT_SEQ_MISC_8;
+		break;
+
+	case 16:
+		hw.co_pixfmt		= CO_PIXFMT_16BPP;
+		hw.pitch		= hw.width >> 2;
+
+		switch (var->green.length) {
+		case 6: /* RGB565, 64k */
+			hw.extseqmisc	= EXT_SEQ_MISC_16_RGB565;
+			break;
+		case 5: /* RGB555, 32k */
+			hw.extseqmisc	= EXT_SEQ_MISC_16_RGB555;
+			break;
+		case 4: /* RGB444, 4k + transparency? */
+			hw.extseqmisc	= EXT_SEQ_MISC_16_RGB444;
+			break;
+		default:
+			BUG();
+		}
+		break;
+
+	case 24:/* TRUECOLOUR, 16m */
+		hw.co_pixfmt		= CO_PIXFMT_24BPP;
+		hw.width		*= 3;
+		hw.pitch		= hw.width >> 3;
+		hw.ramdac		|= (RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
+		hw.extseqmisc		= EXT_SEQ_MISC_24_RGB888;
+		break;
+
+	case 32:/* TRUECOLOUR, 16m */
+		hw.co_pixfmt		= CO_PIXFMT_32BPP;
+		hw.pitch		= hw.width >> 1;
+		hw.ramdac		|= (RAMDAC_BYPASS | RAMDAC_RAMPWRDN);
+		hw.extseqmisc		= EXT_SEQ_MISC_32;
+		break;
+
+	default:
+		BUG();
+	}
+
+	/*
+	 * Sigh, this is absolutely disgusting, but caused by
+	 * the way the fbcon developers want to separate out
+	 * the "checking" and the "setting" of the video mode.
+	 *
+	 * If the mode is not suitable for the hardware here,
+	 * we can't prevent it being set by returning an error.
+	 *
+	 * In theory, since NetWinders contain just one VGA card,
+	 * we should never end up hitting this problem.
+	 */
+	BUG_ON(cyber2000fb_decode_clock(&hw, cfb, var) != 0);
+	BUG_ON(cyber2000fb_decode_crtc(&hw, cfb, var) != 0);
+
+	hw.width -= 1;
+	hw.fetch = hw.pitch;
+	if (!(cfb->mem_ctl2 & MEM_CTL2_64BIT))
+		hw.fetch <<= 1;
+	hw.fetch += 1;
+
+	cfb->fb.fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
+
+	/*
+	 * Same here - if the size of the video mode exceeds the
+	 * available RAM, we can't prevent this mode being set.
+	 *
+	 * In theory, since NetWinders contain just one VGA card,
+	 * we should never end up hitting this problem.
+	 */
+	mem = cfb->fb.fix.line_length * var->yres_virtual;
+	BUG_ON(mem > cfb->fb.fix.smem_len);
+
+	/*
+	 * 8bpp displays are always pseudo colour.  16bpp and above
+	 * are direct colour or true colour, depending on whether
+	 * the RAMDAC palettes are bypassed.  (Direct colour has
+	 * palettes, true colour does not.)
+	 */
+	if (var->bits_per_pixel == 8)
+		cfb->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;
+	else if (hw.ramdac & RAMDAC_BYPASS)
+		cfb->fb.fix.visual = FB_VISUAL_TRUECOLOR;
+	else
+		cfb->fb.fix.visual = FB_VISUAL_DIRECTCOLOR;
+
+	cyber2000fb_set_timing(cfb, &hw);
+	cyber2000fb_update_start(cfb, var);
+
+	return 0;
+}
+
+/*
+ *    Pan or Wrap the Display
+ */
+static int
+cyber2000fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+
+	if (cyber2000fb_update_start(cfb, var))
+		return -EINVAL;
+
+	cfb->fb.var.xoffset = var->xoffset;
+	cfb->fb.var.yoffset = var->yoffset;
+
+	if (var->vmode & FB_VMODE_YWRAP) {
+		cfb->fb.var.vmode |= FB_VMODE_YWRAP;
+	} else {
+		cfb->fb.var.vmode &= ~FB_VMODE_YWRAP;
+	}
+
+	return 0;
+}
+
+/*
+ *    (Un)Blank the display.
+ *
+ *  Blank the screen if blank_mode != 0, else unblank. If
+ *  blank == NULL then the caller blanks by setting the CLUT
+ *  (Color Look Up Table) to all black. Return 0 if blanking
+ *  succeeded, != 0 if un-/blanking failed due to e.g. a
+ *  video mode which doesn't support it. Implements VESA
+ *  suspend and powerdown modes on hardware that supports
+ *  disabling hsync/vsync:
+ *    blank_mode == 2: suspend vsync
+ *    blank_mode == 3: suspend hsync
+ *    blank_mode == 4: powerdown
+ *
+ *  wms...Enable VESA DMPS compatible powerdown mode
+ *  run "setterm -powersave powerdown" to take advantage
+ */
+static int cyber2000fb_blank(int blank, struct fb_info *info)
+{
+	struct cfb_info *cfb = container_of(info, struct cfb_info, fb);
+	unsigned int sync = 0;
+	int i;
+
+	switch (blank) {
+	case FB_BLANK_POWERDOWN:	/* powerdown - both sync lines down */
+		sync = EXT_SYNC_CTL_VS_0 | EXT_SYNC_CTL_HS_0;
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:	/* hsync off */
+		sync = EXT_SYNC_CTL_VS_NORMAL | EXT_SYNC_CTL_HS_0;
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:	/* vsync off */
+		sync = EXT_SYNC_CTL_VS_0 | EXT_SYNC_CTL_HS_NORMAL;
+		break;
+	case FB_BLANK_NORMAL:		/* soft blank */
+	default:			/* unblank */
+		break;
+	}
+
+	cyber2000_grphw(EXT_SYNC_CTL, sync, cfb);
+
+	if (blank <= 1) {
+		/* turn on ramdacs */
+		cfb->ramdac_powerdown &= ~(RAMDAC_DACPWRDN | RAMDAC_BYPASS |
+					   RAMDAC_RAMPWRDN);
+		cyber2000fb_write_ramdac_ctrl(cfb);
+	}
+
+	/*
+	 * Soft blank/unblank the display.
+	 */
+	if (blank) {	/* soft blank */
+		for (i = 0; i < NR_PALETTE; i++) {
+			cyber2000fb_writeb(i, 0x3c8, cfb);
+			cyber2000fb_writeb(0, 0x3c9, cfb);
+			cyber2000fb_writeb(0, 0x3c9, cfb);
+			cyber2000fb_writeb(0, 0x3c9, cfb);
+		}
+	} else {	/* unblank */
+		for (i = 0; i < NR_PALETTE; i++) {
+			cyber2000fb_writeb(i, 0x3c8, cfb);
+			cyber2000fb_writeb(cfb->palette[i].red, 0x3c9, cfb);
+			cyber2000fb_writeb(cfb->palette[i].green, 0x3c9, cfb);
+			cyber2000fb_writeb(cfb->palette[i].blue, 0x3c9, cfb);
+		}
+	}
+
+	if (blank >= 2) {
+		/* turn off ramdacs */
+		cfb->ramdac_powerdown |= RAMDAC_DACPWRDN | RAMDAC_BYPASS |
+					 RAMDAC_RAMPWRDN;
+		cyber2000fb_write_ramdac_ctrl(cfb);
+	}
+
+	return 0;
+}
+
+static const struct fb_ops cyber2000fb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_check_var	= cyber2000fb_check_var,
+	.fb_set_par	= cyber2000fb_set_par,
+	.fb_setcolreg	= cyber2000fb_setcolreg,
+	.fb_blank	= cyber2000fb_blank,
+	.fb_pan_display	= cyber2000fb_pan_display,
+	.fb_fillrect	= cyber2000fb_fillrect,
+	.fb_copyarea	= cyber2000fb_copyarea,
+	.fb_imageblit	= cyber2000fb_imageblit,
+	.fb_sync	= cyber2000fb_sync,
+};
+
+/*
+ * This is the only "static" reference to the internal data structures
+ * of this driver.  It is here solely at the moment to support the other
+ * CyberPro modules external to this driver.
+ */
+static struct cfb_info *int_cfb_info;
+
+/*
+ * Enable access to the extended registers
+ */
+void cyber2000fb_enable_extregs(struct cfb_info *cfb)
+{
+	cfb->func_use_count += 1;
+
+	if (cfb->func_use_count == 1) {
+		int old;
+
+		old = cyber2000_grphr(EXT_FUNC_CTL, cfb);
+		old |= EXT_FUNC_CTL_EXTREGENBL;
+		cyber2000_grphw(EXT_FUNC_CTL, old, cfb);
+	}
+}
+EXPORT_SYMBOL(cyber2000fb_enable_extregs);
+
+/*
+ * Disable access to the extended registers
+ */
+void cyber2000fb_disable_extregs(struct cfb_info *cfb)
+{
+	if (cfb->func_use_count == 1) {
+		int old;
+
+		old = cyber2000_grphr(EXT_FUNC_CTL, cfb);
+		old &= ~EXT_FUNC_CTL_EXTREGENBL;
+		cyber2000_grphw(EXT_FUNC_CTL, old, cfb);
+	}
+
+	if (cfb->func_use_count == 0)
+		printk(KERN_ERR "disable_extregs: count = 0\n");
+	else
+		cfb->func_use_count -= 1;
+}
+EXPORT_SYMBOL(cyber2000fb_disable_extregs);
+
+/*
+ * Attach a capture/tv driver to the core CyberX0X0 driver.
+ */
+int cyber2000fb_attach(struct cyberpro_info *info, int idx)
+{
+	if (int_cfb_info != NULL) {
+		info->dev	      = int_cfb_info->fb.device;
+#ifdef CONFIG_FB_CYBER2000_I2C
+		info->i2c	      = &int_cfb_info->i2c_adapter;
+#else
+		info->i2c	      = NULL;
+#endif
+		info->regs	      = int_cfb_info->regs;
+		info->irq             = int_cfb_info->irq;
+		info->fb	      = int_cfb_info->fb.screen_base;
+		info->fb_size	      = int_cfb_info->fb.fix.smem_len;
+		info->info	      = int_cfb_info;
+
+		strscpy(info->dev_name, int_cfb_info->fb.fix.id,
+			sizeof(info->dev_name));
+	}
+
+	return int_cfb_info != NULL;
+}
+EXPORT_SYMBOL(cyber2000fb_attach);
+
+/*
+ * Detach a capture/tv driver from the core CyberX0X0 driver.
+ */
+void cyber2000fb_detach(int idx)
+{
+}
+EXPORT_SYMBOL(cyber2000fb_detach);
+
+#ifdef CONFIG_FB_CYBER2000_DDC
+
+#define DDC_REG		0xb0
+#define DDC_SCL_OUT	(1 << 0)
+#define DDC_SDA_OUT	(1 << 4)
+#define DDC_SCL_IN	(1 << 2)
+#define DDC_SDA_IN	(1 << 6)
+
+static void cyber2000fb_enable_ddc(struct cfb_info *cfb)
+	__acquires(&cfb->reg_b0_lock)
+{
+	spin_lock(&cfb->reg_b0_lock);
+	cyber2000fb_writew(0x1bf, 0x3ce, cfb);
+}
+
+static void cyber2000fb_disable_ddc(struct cfb_info *cfb)
+	__releases(&cfb->reg_b0_lock)
+{
+	cyber2000fb_writew(0x0bf, 0x3ce, cfb);
+	spin_unlock(&cfb->reg_b0_lock);
+}
+
+
+static void cyber2000fb_ddc_setscl(void *data, int val)
+{
+	struct cfb_info *cfb = data;
+	unsigned char reg;
+
+	cyber2000fb_enable_ddc(cfb);
+	reg = cyber2000_grphr(DDC_REG, cfb);
+	if (!val)	/* bit is inverted */
+		reg |= DDC_SCL_OUT;
+	else
+		reg &= ~DDC_SCL_OUT;
+	cyber2000_grphw(DDC_REG, reg, cfb);
+	cyber2000fb_disable_ddc(cfb);
+}
+
+static void cyber2000fb_ddc_setsda(void *data, int val)
+{
+	struct cfb_info *cfb = data;
+	unsigned char reg;
+
+	cyber2000fb_enable_ddc(cfb);
+	reg = cyber2000_grphr(DDC_REG, cfb);
+	if (!val)	/* bit is inverted */
+		reg |= DDC_SDA_OUT;
+	else
+		reg &= ~DDC_SDA_OUT;
+	cyber2000_grphw(DDC_REG, reg, cfb);
+	cyber2000fb_disable_ddc(cfb);
+}
+
+static int cyber2000fb_ddc_getscl(void *data)
+{
+	struct cfb_info *cfb = data;
+	int retval;
+
+	cyber2000fb_enable_ddc(cfb);
+	retval = !!(cyber2000_grphr(DDC_REG, cfb) & DDC_SCL_IN);
+	cyber2000fb_disable_ddc(cfb);
+
+	return retval;
+}
+
+static int cyber2000fb_ddc_getsda(void *data)
+{
+	struct cfb_info *cfb = data;
+	int retval;
+
+	cyber2000fb_enable_ddc(cfb);
+	retval = !!(cyber2000_grphr(DDC_REG, cfb) & DDC_SDA_IN);
+	cyber2000fb_disable_ddc(cfb);
+
+	return retval;
+}
+
+static int cyber2000fb_setup_ddc_bus(struct cfb_info *cfb)
+{
+	strscpy(cfb->ddc_adapter.name, cfb->fb.fix.id,
+		sizeof(cfb->ddc_adapter.name));
+	cfb->ddc_adapter.owner		= THIS_MODULE;
+	cfb->ddc_adapter.class		= I2C_CLASS_DDC;
+	cfb->ddc_adapter.algo_data	= &cfb->ddc_algo;
+	cfb->ddc_adapter.dev.parent	= cfb->fb.device;
+	cfb->ddc_algo.setsda		= cyber2000fb_ddc_setsda;
+	cfb->ddc_algo.setscl		= cyber2000fb_ddc_setscl;
+	cfb->ddc_algo.getsda		= cyber2000fb_ddc_getsda;
+	cfb->ddc_algo.getscl		= cyber2000fb_ddc_getscl;
+	cfb->ddc_algo.udelay		= 10;
+	cfb->ddc_algo.timeout		= 20;
+	cfb->ddc_algo.data		= cfb;
+
+	i2c_set_adapdata(&cfb->ddc_adapter, cfb);
+
+	return i2c_bit_add_bus(&cfb->ddc_adapter);
+}
+#endif /* CONFIG_FB_CYBER2000_DDC */
+
+#ifdef CONFIG_FB_CYBER2000_I2C
+static void cyber2000fb_i2c_setsda(void *data, int state)
+{
+	struct cfb_info *cfb = data;
+	unsigned int latch2;
+
+	spin_lock(&cfb->reg_b0_lock);
+	latch2 = cyber2000_grphr(EXT_LATCH2, cfb);
+	latch2 &= EXT_LATCH2_I2C_CLKEN;
+	if (state)
+		latch2 |= EXT_LATCH2_I2C_DATEN;
+	cyber2000_grphw(EXT_LATCH2, latch2, cfb);
+	spin_unlock(&cfb->reg_b0_lock);
+}
+
+static void cyber2000fb_i2c_setscl(void *data, int state)
+{
+	struct cfb_info *cfb = data;
+	unsigned int latch2;
+
+	spin_lock(&cfb->reg_b0_lock);
+	latch2 = cyber2000_grphr(EXT_LATCH2, cfb);
+	latch2 &= EXT_LATCH2_I2C_DATEN;
+	if (state)
+		latch2 |= EXT_LATCH2_I2C_CLKEN;
+	cyber2000_grphw(EXT_LATCH2, latch2, cfb);
+	spin_unlock(&cfb->reg_b0_lock);
+}
+
+static int cyber2000fb_i2c_getsda(void *data)
+{
+	struct cfb_info *cfb = data;
+	int ret;
+
+	spin_lock(&cfb->reg_b0_lock);
+	ret = !!(cyber2000_grphr(EXT_LATCH2, cfb) & EXT_LATCH2_I2C_DAT);
+	spin_unlock(&cfb->reg_b0_lock);
+
+	return ret;
+}
+
+static int cyber2000fb_i2c_getscl(void *data)
+{
+	struct cfb_info *cfb = data;
+	int ret;
+
+	spin_lock(&cfb->reg_b0_lock);
+	ret = !!(cyber2000_grphr(EXT_LATCH2, cfb) & EXT_LATCH2_I2C_CLK);
+	spin_unlock(&cfb->reg_b0_lock);
+
+	return ret;
+}
+
+static int cyber2000fb_i2c_register(struct cfb_info *cfb)
+{
+	strscpy(cfb->i2c_adapter.name, cfb->fb.fix.id,
+		sizeof(cfb->i2c_adapter.name));
+	cfb->i2c_adapter.owner = THIS_MODULE;
+	cfb->i2c_adapter.algo_data = &cfb->i2c_algo;
+	cfb->i2c_adapter.dev.parent = cfb->fb.device;
+	cfb->i2c_algo.setsda = cyber2000fb_i2c_setsda;
+	cfb->i2c_algo.setscl = cyber2000fb_i2c_setscl;
+	cfb->i2c_algo.getsda = cyber2000fb_i2c_getsda;
+	cfb->i2c_algo.getscl = cyber2000fb_i2c_getscl;
+	cfb->i2c_algo.udelay = 5;
+	cfb->i2c_algo.timeout = msecs_to_jiffies(100);
+	cfb->i2c_algo.data = cfb;
+
+	return i2c_bit_add_bus(&cfb->i2c_adapter);
+}
+
+static void cyber2000fb_i2c_unregister(struct cfb_info *cfb)
+{
+	i2c_del_adapter(&cfb->i2c_adapter);
+}
+#else
+#define cyber2000fb_i2c_register(cfb)	(0)
+#define cyber2000fb_i2c_unregister(cfb)	do { } while (0)
+#endif
+
+/*
+ * These parameters give
+ * 640x480, hsync 31.5kHz, vsync 60Hz
+ */
+static const struct fb_videomode cyber2000fb_default_mode = {
+	.refresh	= 60,
+	.xres		= 640,
+	.yres		= 480,
+	.pixclock	= 39722,
+	.left_margin	= 56,
+	.right_margin	= 16,
+	.upper_margin	= 34,
+	.lower_margin	= 9,
+	.hsync_len	= 88,
+	.vsync_len	= 2,
+	.sync		= FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	.vmode		= FB_VMODE_NONINTERLACED
+};
+
+static char igs_regs[] = {
+	EXT_CRT_IRQ,		0,
+	EXT_CRT_TEST,		0,
+	EXT_SYNC_CTL,		0,
+	EXT_SEG_WRITE_PTR,	0,
+	EXT_SEG_READ_PTR,	0,
+	EXT_BIU_MISC,		EXT_BIU_MISC_LIN_ENABLE |
+				EXT_BIU_MISC_COP_ENABLE |
+				EXT_BIU_MISC_COP_BFC,
+	EXT_FUNC_CTL,		0,
+	CURS_H_START,		0,
+	CURS_H_START + 1,	0,
+	CURS_H_PRESET,		0,
+	CURS_V_START,		0,
+	CURS_V_START + 1,	0,
+	CURS_V_PRESET,		0,
+	CURS_CTL,		0,
+	EXT_ATTRIB_CTL,		EXT_ATTRIB_CTL_EXT,
+	EXT_OVERSCAN_RED,	0,
+	EXT_OVERSCAN_GREEN,	0,
+	EXT_OVERSCAN_BLUE,	0,
+
+	/* some of these are questionable when we have a BIOS */
+	EXT_MEM_CTL0,		EXT_MEM_CTL0_7CLK |
+				EXT_MEM_CTL0_RAS_1 |
+				EXT_MEM_CTL0_MULTCAS,
+	EXT_HIDDEN_CTL1,	0x30,
+	EXT_FIFO_CTL,		0x0b,
+	EXT_FIFO_CTL + 1,	0x17,
+	0x76,			0x00,
+	EXT_HIDDEN_CTL4,	0xc8
+};
+
+/*
+ * Initialise the CyberPro hardware.  On the CyberPro5XXXX,
+ * ensure that we're using the correct PLL (5XXX's may be
+ * programmed to use an additional set of PLLs.)
+ */
+static void cyberpro_init_hw(struct cfb_info *cfb)
+{
+	int i;
+
+	for (i = 0; i < sizeof(igs_regs); i += 2)
+		cyber2000_grphw(igs_regs[i], igs_regs[i + 1], cfb);
+
+	if (cfb->id == ID_CYBERPRO_5000) {
+		unsigned char val;
+		cyber2000fb_writeb(0xba, 0x3ce, cfb);
+		val = cyber2000fb_readb(0x3cf, cfb) & 0x80;
+		cyber2000fb_writeb(val, 0x3cf, cfb);
+	}
+}
+
+static struct cfb_info *cyberpro_alloc_fb_info(unsigned int id, char *name)
+{
+	struct cfb_info *cfb;
+
+	cfb = kzalloc(sizeof(struct cfb_info), GFP_KERNEL);
+	if (!cfb)
+		return NULL;
+
+
+	cfb->id			= id;
+
+	if (id == ID_CYBERPRO_5000)
+		cfb->ref_ps	= 40690; /* 24.576 MHz */
+	else
+		cfb->ref_ps	= 69842; /* 14.31818 MHz (69841?) */
+
+	cfb->divisors[0]	= 1;
+	cfb->divisors[1]	= 2;
+	cfb->divisors[2]	= 4;
+
+	if (id == ID_CYBERPRO_2000)
+		cfb->divisors[3] = 8;
+	else
+		cfb->divisors[3] = 6;
+
+	strcpy(cfb->fb.fix.id, name);
+
+	cfb->fb.fix.type	= FB_TYPE_PACKED_PIXELS;
+	cfb->fb.fix.type_aux	= 0;
+	cfb->fb.fix.xpanstep	= 0;
+	cfb->fb.fix.ypanstep	= 1;
+	cfb->fb.fix.ywrapstep	= 0;
+
+	switch (id) {
+	case ID_IGA_1682:
+		cfb->fb.fix.accel = 0;
+		break;
+
+	case ID_CYBERPRO_2000:
+		cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER2000;
+		break;
+
+	case ID_CYBERPRO_2010:
+		cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER2010;
+		break;
+
+	case ID_CYBERPRO_5000:
+		cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER5000;
+		break;
+	}
+
+	cfb->fb.var.nonstd	= 0;
+	cfb->fb.var.activate	= FB_ACTIVATE_NOW;
+	cfb->fb.var.height	= -1;
+	cfb->fb.var.width	= -1;
+	cfb->fb.var.accel_flags	= FB_ACCELF_TEXT;
+
+	cfb->fb.fbops		= &cyber2000fb_ops;
+	cfb->fb.flags		= FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
+	cfb->fb.pseudo_palette	= cfb->pseudo_palette;
+
+	spin_lock_init(&cfb->reg_b0_lock);
+
+	fb_alloc_cmap(&cfb->fb.cmap, NR_PALETTE, 0);
+
+	return cfb;
+}
+
+static void cyberpro_free_fb_info(struct cfb_info *cfb)
+{
+	if (cfb) {
+		/*
+		 * Free the colourmap
+		 */
+		fb_alloc_cmap(&cfb->fb.cmap, 0, 0);
+
+		kfree(cfb);
+	}
+}
+
+/*
+ * Parse Cyber2000fb options.  Usage:
+ *  video=cyber2000:font:fontname
+ */
+#ifndef MODULE
+static int cyber2000fb_setup(char *options)
+{
+	char *opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((opt = strsep(&options, ",")) != NULL) {
+		if (!*opt)
+			continue;
+
+		if (strncmp(opt, "font:", 5) == 0) {
+			static char default_font_storage[40];
+
+			strscpy(default_font_storage, opt + 5,
+				sizeof(default_font_storage));
+			default_font = default_font_storage;
+			continue;
+		}
+
+		printk(KERN_ERR "CyberPro20x0: unknown parameter: %s\n", opt);
+	}
+	return 0;
+}
+#endif  /*  MODULE  */
+
+/*
+ * The CyberPro chips can be placed on many different bus types.
+ * This probe function is common to all bus types.  The bus-specific
+ * probe function is expected to have:
+ *  - enabled access to the linear memory region
+ *  - memory mapped access to the registers
+ *  - initialised mem_ctl1 and mem_ctl2 appropriately.
+ */
+static int cyberpro_common_probe(struct cfb_info *cfb)
+{
+	u_long smem_size;
+	u_int h_sync, v_sync;
+	int err;
+
+	cyberpro_init_hw(cfb);
+
+	/*
+	 * Get the video RAM size and width from the VGA register.
+	 * This should have been already initialised by the BIOS,
+	 * but if it's garbage, claim default 1MB VRAM (woody)
+	 */
+	cfb->mem_ctl1 = cyber2000_grphr(EXT_MEM_CTL1, cfb);
+	cfb->mem_ctl2 = cyber2000_grphr(EXT_MEM_CTL2, cfb);
+
+	/*
+	 * Determine the size of the memory.
+	 */
+	switch (cfb->mem_ctl2 & MEM_CTL2_SIZE_MASK) {
+	case MEM_CTL2_SIZE_4MB:
+		smem_size = 0x00400000;
+		break;
+	case MEM_CTL2_SIZE_2MB:
+		smem_size = 0x00200000;
+		break;
+	case MEM_CTL2_SIZE_1MB:
+		smem_size = 0x00100000;
+		break;
+	default:
+		smem_size = 0x00100000;
+		break;
+	}
+
+	cfb->fb.fix.smem_len   = smem_size;
+	cfb->fb.fix.mmio_len   = MMIO_SIZE;
+	cfb->fb.screen_base    = cfb->region;
+
+#ifdef CONFIG_FB_CYBER2000_DDC
+	if (cyber2000fb_setup_ddc_bus(cfb) == 0)
+		cfb->ddc_registered = true;
+#endif
+
+	err = -EINVAL;
+	if (!fb_find_mode(&cfb->fb.var, &cfb->fb, NULL, NULL, 0,
+			  &cyber2000fb_default_mode, 8)) {
+		printk(KERN_ERR "%s: no valid mode found\n", cfb->fb.fix.id);
+		goto failed;
+	}
+
+	cfb->fb.var.yres_virtual = cfb->fb.fix.smem_len * 8 /
+			(cfb->fb.var.bits_per_pixel * cfb->fb.var.xres_virtual);
+
+	if (cfb->fb.var.yres_virtual < cfb->fb.var.yres)
+		cfb->fb.var.yres_virtual = cfb->fb.var.yres;
+
+/*	fb_set_var(&cfb->fb.var, -1, &cfb->fb); */
+
+	/*
+	 * Calculate the hsync and vsync frequencies.  Note that
+	 * we split the 1e12 constant up so that we can preserve
+	 * the precision and fit the results into 32-bit registers.
+	 *  (1953125000 * 512 = 1e12)
+	 */
+	h_sync = 1953125000 / cfb->fb.var.pixclock;
+	h_sync = h_sync * 512 / (cfb->fb.var.xres + cfb->fb.var.left_margin +
+		 cfb->fb.var.right_margin + cfb->fb.var.hsync_len);
+	v_sync = h_sync / (cfb->fb.var.yres + cfb->fb.var.upper_margin +
+		 cfb->fb.var.lower_margin + cfb->fb.var.vsync_len);
+
+	printk(KERN_INFO "%s: %dKiB VRAM, using %dx%d, %d.%03dkHz, %dHz\n",
+		cfb->fb.fix.id, cfb->fb.fix.smem_len >> 10,
+		cfb->fb.var.xres, cfb->fb.var.yres,
+		h_sync / 1000, h_sync % 1000, v_sync);
+
+	err = cyber2000fb_i2c_register(cfb);
+	if (err)
+		goto failed;
+
+	err = register_framebuffer(&cfb->fb);
+	if (err)
+		cyber2000fb_i2c_unregister(cfb);
+
+failed:
+#ifdef CONFIG_FB_CYBER2000_DDC
+	if (err && cfb->ddc_registered)
+		i2c_del_adapter(&cfb->ddc_adapter);
+#endif
+	return err;
+}
+
+static void cyberpro_common_remove(struct cfb_info *cfb)
+{
+	unregister_framebuffer(&cfb->fb);
+#ifdef CONFIG_FB_CYBER2000_DDC
+	if (cfb->ddc_registered)
+		i2c_del_adapter(&cfb->ddc_adapter);
+#endif
+	cyber2000fb_i2c_unregister(cfb);
+}
+
+static void cyberpro_common_resume(struct cfb_info *cfb)
+{
+	cyberpro_init_hw(cfb);
+
+	/*
+	 * Reprogram the MEM_CTL1 and MEM_CTL2 registers
+	 */
+	cyber2000_grphw(EXT_MEM_CTL1, cfb->mem_ctl1, cfb);
+	cyber2000_grphw(EXT_MEM_CTL2, cfb->mem_ctl2, cfb);
+
+	/*
+	 * Restore the old video mode and the palette.
+	 * We also need to tell fbcon to redraw the console.
+	 */
+	cyber2000fb_set_par(&cfb->fb);
+}
+
+/*
+ * We need to wake up the CyberPro, and make sure its in linear memory
+ * mode.  Unfortunately, this is specific to the platform and card that
+ * we are running on.
+ *
+ * On x86 and ARM, should we be initialising the CyberPro first via the
+ * IO registers, and then the MMIO registers to catch all cases?  Can we
+ * end up in the situation where the chip is in MMIO mode, but not awake
+ * on an x86 system?
+ */
+static int cyberpro_pci_enable_mmio(struct cfb_info *cfb)
+{
+	unsigned char val;
+
+#if defined(__sparc_v9__)
+#error "You lose, consult DaveM."
+#elif defined(__sparc__)
+	/*
+	 * SPARC does not have an "outb" instruction, so we generate
+	 * I/O cycles storing into a reserved memory space at
+	 * physical address 0x3000000
+	 */
+	unsigned char __iomem *iop;
+
+	iop = ioremap(0x3000000, 0x5000);
+	if (iop == NULL) {
+		printk(KERN_ERR "iga5000: cannot map I/O\n");
+		return -ENOMEM;
+	}
+
+	writeb(0x18, iop + 0x46e8);
+	writeb(0x01, iop + 0x102);
+	writeb(0x08, iop + 0x46e8);
+	writeb(EXT_BIU_MISC, iop + 0x3ce);
+	writeb(EXT_BIU_MISC_LIN_ENABLE, iop + 0x3cf);
+
+	iounmap(iop);
+#else
+	/*
+	 * Most other machine types are "normal", so
+	 * we use the standard IO-based wakeup.
+	 */
+	outb(0x18, 0x46e8);
+	outb(0x01, 0x102);
+	outb(0x08, 0x46e8);
+	outb(EXT_BIU_MISC, 0x3ce);
+	outb(EXT_BIU_MISC_LIN_ENABLE, 0x3cf);
+#endif
+
+	/*
+	 * Allow the CyberPro to accept PCI burst accesses
+	 */
+	if (cfb->id == ID_CYBERPRO_2010) {
+		printk(KERN_INFO "%s: NOT enabling PCI bursts\n",
+		       cfb->fb.fix.id);
+	} else {
+		val = cyber2000_grphr(EXT_BUS_CTL, cfb);
+		if (!(val & EXT_BUS_CTL_PCIBURST_WRITE)) {
+			printk(KERN_INFO "%s: enabling PCI bursts\n",
+				cfb->fb.fix.id);
+
+			val |= EXT_BUS_CTL_PCIBURST_WRITE;
+
+			if (cfb->id == ID_CYBERPRO_5000)
+				val |= EXT_BUS_CTL_PCIBURST_READ;
+
+			cyber2000_grphw(EXT_BUS_CTL, val, cfb);
+		}
+	}
+
+	return 0;
+}
+
+static int cyberpro_pci_probe(struct pci_dev *dev,
+			      const struct pci_device_id *id)
+{
+	struct cfb_info *cfb;
+	char name[16];
+	int err;
+
+	sprintf(name, "CyberPro%4X", id->device);
+
+	err = aperture_remove_conflicting_pci_devices(dev, name);
+	if (err)
+		return err;
+
+	err = pci_enable_device(dev);
+	if (err)
+		return err;
+
+	err = -ENOMEM;
+	cfb = cyberpro_alloc_fb_info(id->driver_data, name);
+	if (!cfb)
+		goto failed_release;
+
+	err = pci_request_regions(dev, cfb->fb.fix.id);
+	if (err)
+		goto failed_regions;
+
+	cfb->irq = dev->irq;
+	cfb->region = pci_ioremap_bar(dev, 0);
+	if (!cfb->region) {
+		err = -ENOMEM;
+		goto failed_ioremap;
+	}
+
+	cfb->regs = cfb->region + MMIO_OFFSET;
+	cfb->fb.device = &dev->dev;
+	cfb->fb.fix.mmio_start = pci_resource_start(dev, 0) + MMIO_OFFSET;
+	cfb->fb.fix.smem_start = pci_resource_start(dev, 0);
+
+	/*
+	 * Bring up the hardware.  This is expected to enable access
+	 * to the linear memory region, and allow access to the memory
+	 * mapped registers.  Also, mem_ctl1 and mem_ctl2 must be
+	 * initialised.
+	 */
+	err = cyberpro_pci_enable_mmio(cfb);
+	if (err)
+		goto failed;
+
+	/*
+	 * Use MCLK from BIOS. FIXME: what about hotplug?
+	 */
+	cfb->mclk_mult = cyber2000_grphr(EXT_MCLK_MULT, cfb);
+	cfb->mclk_div  = cyber2000_grphr(EXT_MCLK_DIV, cfb);
+
+#ifdef __arm__
+	/*
+	 * MCLK on the NetWinder and the Shark is fixed at 75MHz
+	 */
+	if (machine_is_netwinder()) {
+		cfb->mclk_mult = 0xdb;
+		cfb->mclk_div  = 0x54;
+	}
+#endif
+
+	err = cyberpro_common_probe(cfb);
+	if (err)
+		goto failed;
+
+	/*
+	 * Our driver data
+	 */
+	pci_set_drvdata(dev, cfb);
+	if (int_cfb_info == NULL)
+		int_cfb_info = cfb;
+
+	return 0;
+
+failed:
+	iounmap(cfb->region);
+failed_ioremap:
+	pci_release_regions(dev);
+failed_regions:
+	cyberpro_free_fb_info(cfb);
+failed_release:
+	pci_disable_device(dev);
+	return err;
+}
+
+static void cyberpro_pci_remove(struct pci_dev *dev)
+{
+	struct cfb_info *cfb = pci_get_drvdata(dev);
+
+	if (cfb) {
+		cyberpro_common_remove(cfb);
+		iounmap(cfb->region);
+		cyberpro_free_fb_info(cfb);
+
+		if (cfb == int_cfb_info)
+			int_cfb_info = NULL;
+
+		pci_release_regions(dev);
+		pci_disable_device(dev);
+	}
+}
+
+static int __maybe_unused cyberpro_pci_suspend(struct device *dev)
+{
+	return 0;
+}
+
+/*
+ * Re-initialise the CyberPro hardware
+ */
+static int __maybe_unused cyberpro_pci_resume(struct device *dev)
+{
+	struct cfb_info *cfb = dev_get_drvdata(dev);
+
+	if (cfb) {
+		cyberpro_pci_enable_mmio(cfb);
+		cyberpro_common_resume(cfb);
+	}
+
+	return 0;
+}
+
+static struct pci_device_id cyberpro_pci_table[] = {
+/*	Not yet
+ *	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_1682,
+ *		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_IGA_1682 },
+ */
+	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2000,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_2000 },
+	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2010,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_2010 },
+	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_5000,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_5000 },
+	{ 0, }
+};
+
+MODULE_DEVICE_TABLE(pci, cyberpro_pci_table);
+
+static SIMPLE_DEV_PM_OPS(cyberpro_pci_pm_ops,
+			 cyberpro_pci_suspend,
+			 cyberpro_pci_resume);
+
+static struct pci_driver cyberpro_driver = {
+	.name		= "CyberPro",
+	.probe		= cyberpro_pci_probe,
+	.remove		= cyberpro_pci_remove,
+	.driver.pm	= &cyberpro_pci_pm_ops,
+	.id_table	= cyberpro_pci_table
+};
+
+/*
+ * I don't think we can use the "module_init" stuff here because
+ * the fbcon stuff may not be initialised yet.  Hence the #ifdef
+ * around module_init.
+ *
+ * Tony: "module_init" is now required
+ */
+static int __init cyber2000fb_init(void)
+{
+	int ret = -1, err;
+
+#ifndef MODULE
+	char *option = NULL;
+
+	if (fb_get_options("cyber2000fb", &option))
+		return -ENODEV;
+	cyber2000fb_setup(option);
+#endif
+
+	err = pci_register_driver(&cyberpro_driver);
+	if (!err)
+		ret = 0;
+
+	return ret ? err : 0;
+}
+module_init(cyber2000fb_init);
+
+static void __exit cyberpro_exit(void)
+{
+	pci_unregister_driver(&cyberpro_driver);
+}
+module_exit(cyberpro_exit);
+
+MODULE_AUTHOR("Russell King");
+MODULE_DESCRIPTION("CyberPro 2000, 2010 and 5000 framebuffer driver");
+MODULE_LICENSE("GPL");