From a9ed3aa9b87ee41e8ab3ff471b1331c154767e45 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Sat, 26 Sep 2026 07:57:59 +1000
Subject: Merge tag 'drm-misc-fixes-2026-09-24' of
 https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

A number of fixes:
  - bridge:
    - samsung-dsim: fix GPIO lifetime
  - client: Null pointer dereference fix
  - imagination: error handling fix, page handling fix
  - nouveau: fix reference leaks, double-frees, out-of-bounds accesses,
    use-after-frees, don't reject config without SCDC,  a number of
    workarounds
  - virtio: fix memory leak, reference leaks, null pointer dereference,
    add pixel blend mode, cache coherency fix

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <self@mripard.dev>
Link: https://patch.msgid.link/arU22zzqUGDEco1y@houat
---
 drivers/video/fbdev/neofb.c | 2218 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 2218 insertions(+)
 create mode 100644 drivers/video/fbdev/neofb.c

(limited to 'drivers/video/fbdev/neofb.c')

diff --git a/drivers/video/fbdev/neofb.c b/drivers/video/fbdev/neofb.c
new file mode 100644
index 000000000..e0b8d4d6c
--- /dev/null
+++ b/drivers/video/fbdev/neofb.c
@@ -0,0 +1,2218 @@
+/*
+ * linux/drivers/video/neofb.c -- NeoMagic Framebuffer Driver
+ *
+ * Copyright (c) 2001-2002  Denis Oliver Kropp <dok@directfb.org>
+ *
+ *
+ * Card specific code is based on XFree86's neomagic driver.
+ * Framebuffer framework code is based on code of cyber2000fb.
+ *
+ * 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.
+ *
+ *
+ * 0.4.1
+ *  - Cosmetic changes (dok)
+ *
+ * 0.4
+ *  - Toshiba Libretto support, allow modes larger than LCD size if
+ *    LCD is disabled, keep BIOS settings if internal/external display
+ *    haven't been enabled explicitly
+ *                          (Thomas J. Moore <dark@mama.indstate.edu>)
+ *
+ * 0.3.3
+ *  - Porting over to new fbdev api. (jsimmons)
+ *
+ * 0.3.2
+ *  - got rid of all floating point (dok)
+ *
+ * 0.3.1
+ *  - added module license (dok)
+ *
+ * 0.3
+ *  - hardware accelerated clear and move for 2200 and above (dok)
+ *  - maximum allowed dotclock is handled now (dok)
+ *
+ * 0.2.1
+ *  - correct panning after X usage (dok)
+ *  - added module and kernel parameters (dok)
+ *  - no stretching if external display is enabled (dok)
+ *
+ * 0.2
+ *  - initial version (dok)
+ *
+ *
+ * TODO
+ * - ioctl for internal/external switching
+ * - blanking
+ * - 32bit depth support, maybe impossible
+ * - disable pan-on-sync, need specs
+ *
+ * BUGS
+ * - white margin on bootup like with tdfxfb (colormap problem?)
+ *
+ */
+
+#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>
+#ifdef CONFIG_TOSHIBA
+#include <linux/toshiba.h>
+#endif
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <video/vga.h>
+#include <video/neomagic.h>
+
+#define NEOFB_VERSION "0.4.2"
+
+/* --------------------------------------------------------------------- */
+
+static bool internal;
+static bool external;
+static bool libretto;
+static bool nostretch;
+static bool nopciburst;
+static char *mode_option = NULL;
+
+#ifdef MODULE
+
+MODULE_AUTHOR("(c) 2001-2002  Denis Oliver Kropp <dok@convergence.de>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("FBDev driver for NeoMagic PCI Chips");
+module_param(internal, bool, 0);
+MODULE_PARM_DESC(internal, "Enable output on internal LCD Display.");
+module_param(external, bool, 0);
+MODULE_PARM_DESC(external, "Enable output on external CRT.");
+module_param(libretto, bool, 0);
+MODULE_PARM_DESC(libretto, "Force Libretto 100/110 800x480 LCD.");
+module_param(nostretch, bool, 0);
+MODULE_PARM_DESC(nostretch,
+		 "Disable stretching of modes smaller than LCD.");
+module_param(nopciburst, bool, 0);
+MODULE_PARM_DESC(nopciburst, "Disable PCI burst mode.");
+module_param(mode_option, charp, 0);
+MODULE_PARM_DESC(mode_option, "Preferred video mode ('640x480-8@60', etc)");
+
+#endif
+
+
+/* --------------------------------------------------------------------- */
+
+static biosMode bios8[] = {
+	{320, 240, 0x40},
+	{300, 400, 0x42},
+	{640, 400, 0x20},
+	{640, 480, 0x21},
+	{800, 600, 0x23},
+	{1024, 768, 0x25},
+};
+
+static biosMode bios16[] = {
+	{320, 200, 0x2e},
+	{320, 240, 0x41},
+	{300, 400, 0x43},
+	{640, 480, 0x31},
+	{800, 600, 0x34},
+	{1024, 768, 0x37},
+};
+
+static biosMode bios24[] = {
+	{640, 480, 0x32},
+	{800, 600, 0x35},
+	{1024, 768, 0x38}
+};
+
+#ifdef NO_32BIT_SUPPORT_YET
+/* FIXME: guessed values, wrong */
+static biosMode bios32[] = {
+	{640, 480, 0x33},
+	{800, 600, 0x36},
+	{1024, 768, 0x39}
+};
+#endif
+
+static inline void write_le32(int regindex, u32 val, const struct neofb_par *par)
+{
+	writel(val, par->neo2200 + par->cursorOff + regindex);
+}
+
+static int neoFindMode(int xres, int yres, int depth)
+{
+	int xres_s;
+	int i, size;
+	biosMode *mode;
+
+	switch (depth) {
+	case 8:
+		size = ARRAY_SIZE(bios8);
+		mode = bios8;
+		break;
+	case 16:
+		size = ARRAY_SIZE(bios16);
+		mode = bios16;
+		break;
+	case 24:
+		size = ARRAY_SIZE(bios24);
+		mode = bios24;
+		break;
+#ifdef NO_32BIT_SUPPORT_YET
+	case 32:
+		size = ARRAY_SIZE(bios32);
+		mode = bios32;
+		break;
+#endif
+	default:
+		return 0;
+	}
+
+	for (i = 0; i < size; i++) {
+		if (xres <= mode[i].x_res) {
+			xres_s = mode[i].x_res;
+			for (; i < size; i++) {
+				if (mode[i].x_res != xres_s)
+					return mode[i - 1].mode;
+				if (yres <= mode[i].y_res)
+					return mode[i].mode;
+			}
+		}
+	}
+	return mode[size - 1].mode;
+}
+
+/*
+ * neoCalcVCLK --
+ *
+ * Determine the closest clock frequency to the one requested.
+ */
+#define MAX_N 127
+#define MAX_D 31
+#define MAX_F 1
+
+static void neoCalcVCLK(const struct fb_info *info,
+			struct neofb_par *par, long freq)
+{
+	int n, d, f;
+	int n_best = 0, d_best = 0, f_best = 0;
+	long f_best_diff = 0x7ffff;
+
+	for (f = 0; f <= MAX_F; f++)
+		for (d = 0; d <= MAX_D; d++)
+			for (n = 0; n <= MAX_N; n++) {
+				long f_out;
+				long f_diff;
+
+				f_out = ((14318 * (n + 1)) / (d + 1)) >> f;
+				f_diff = abs(f_out - freq);
+				if (f_diff <= f_best_diff) {
+					f_best_diff = f_diff;
+					n_best = n;
+					d_best = d;
+					f_best = f;
+				}
+				if (f_out > freq)
+					break;
+			}
+
+	if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2200 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2230 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2360 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2380) {
+		/* NOT_DONE:  We are trying the full range of the 2200 clock.
+		   We should be able to try n up to 2047 */
+		par->VCLK3NumeratorLow = n_best;
+		par->VCLK3NumeratorHigh = (f_best << 7);
+	} else
+		par->VCLK3NumeratorLow = n_best | (f_best << 7);
+
+	par->VCLK3Denominator = d_best;
+
+#ifdef NEOFB_DEBUG
+	printk(KERN_DEBUG "neoVCLK: f:%ld NumLow=%d NumHi=%d Den=%d Df=%ld\n",
+	       freq,
+	       par->VCLK3NumeratorLow,
+	       par->VCLK3NumeratorHigh,
+	       par->VCLK3Denominator, f_best_diff);
+#endif
+}
+
+/*
+ * vgaHWInit --
+ *      Handle the initialization, etc. of a screen.
+ *      Return FALSE on failure.
+ */
+
+static int vgaHWInit(const struct fb_var_screeninfo *var,
+		     struct neofb_par *par)
+{
+	int hsync_end = var->xres + var->right_margin + var->hsync_len;
+	int htotal = (hsync_end + var->left_margin) >> 3;
+	int vsync_start = var->yres + var->lower_margin;
+	int vsync_end = vsync_start + var->vsync_len;
+	int vtotal = vsync_end + var->upper_margin;
+
+	par->MiscOutReg = 0x23;
+
+	if (!(var->sync & FB_SYNC_HOR_HIGH_ACT))
+		par->MiscOutReg |= 0x40;
+
+	if (!(var->sync & FB_SYNC_VERT_HIGH_ACT))
+		par->MiscOutReg |= 0x80;
+
+	/*
+	 * Time Sequencer
+	 */
+	par->Sequencer[0] = 0x00;
+	par->Sequencer[1] = 0x01;
+	par->Sequencer[2] = 0x0F;
+	par->Sequencer[3] = 0x00;	/* Font select */
+	par->Sequencer[4] = 0x0E;	/* Misc */
+
+	/*
+	 * CRTC Controller
+	 */
+	par->CRTC[0] = htotal - 5;
+	par->CRTC[1] = (var->xres >> 3) - 1;
+	par->CRTC[2] = (var->xres >> 3) - 1;
+	par->CRTC[3] = ((htotal - 1) & 0x1F) | 0x80;
+	par->CRTC[4] = ((var->xres + var->right_margin) >> 3);
+	par->CRTC[5] = (((htotal - 1) & 0x20) << 2)
+	    | (((hsync_end >> 3)) & 0x1F);
+	par->CRTC[6] = (vtotal - 2) & 0xFF;
+	par->CRTC[7] = (((vtotal - 2) & 0x100) >> 8)
+	    | (((var->yres - 1) & 0x100) >> 7)
+	    | ((vsync_start & 0x100) >> 6)
+	    | (((var->yres - 1) & 0x100) >> 5)
+	    | 0x10 | (((vtotal - 2) & 0x200) >> 4)
+	    | (((var->yres - 1) & 0x200) >> 3)
+	    | ((vsync_start & 0x200) >> 2);
+	par->CRTC[8] = 0x00;
+	par->CRTC[9] = (((var->yres - 1) & 0x200) >> 4) | 0x40;
+
+	if (var->vmode & FB_VMODE_DOUBLE)
+		par->CRTC[9] |= 0x80;
+
+	par->CRTC[10] = 0x00;
+	par->CRTC[11] = 0x00;
+	par->CRTC[12] = 0x00;
+	par->CRTC[13] = 0x00;
+	par->CRTC[14] = 0x00;
+	par->CRTC[15] = 0x00;
+	par->CRTC[16] = vsync_start & 0xFF;
+	par->CRTC[17] = (vsync_end & 0x0F) | 0x20;
+	par->CRTC[18] = (var->yres - 1) & 0xFF;
+	par->CRTC[19] = var->xres_virtual >> 4;
+	par->CRTC[20] = 0x00;
+	par->CRTC[21] = (var->yres - 1) & 0xFF;
+	par->CRTC[22] = (vtotal - 1) & 0xFF;
+	par->CRTC[23] = 0xC3;
+	par->CRTC[24] = 0xFF;
+
+	/*
+	 * are these unnecessary?
+	 * vgaHWHBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
+	 * vgaHWVBlankKGA(mode, regp, 0, KGA_FIX_OVERSCAN | KGA_ENABLE_ON_ZERO);
+	 */
+
+	/*
+	 * Graphics Display Controller
+	 */
+	par->Graphics[0] = 0x00;
+	par->Graphics[1] = 0x00;
+	par->Graphics[2] = 0x00;
+	par->Graphics[3] = 0x00;
+	par->Graphics[4] = 0x00;
+	par->Graphics[5] = 0x40;
+	par->Graphics[6] = 0x05;	/* only map 64k VGA memory !!!! */
+	par->Graphics[7] = 0x0F;
+	par->Graphics[8] = 0xFF;
+
+
+	par->Attribute[0] = 0x00;	/* standard colormap translation */
+	par->Attribute[1] = 0x01;
+	par->Attribute[2] = 0x02;
+	par->Attribute[3] = 0x03;
+	par->Attribute[4] = 0x04;
+	par->Attribute[5] = 0x05;
+	par->Attribute[6] = 0x06;
+	par->Attribute[7] = 0x07;
+	par->Attribute[8] = 0x08;
+	par->Attribute[9] = 0x09;
+	par->Attribute[10] = 0x0A;
+	par->Attribute[11] = 0x0B;
+	par->Attribute[12] = 0x0C;
+	par->Attribute[13] = 0x0D;
+	par->Attribute[14] = 0x0E;
+	par->Attribute[15] = 0x0F;
+	par->Attribute[16] = 0x41;
+	par->Attribute[17] = 0xFF;
+	par->Attribute[18] = 0x0F;
+	par->Attribute[19] = 0x00;
+	par->Attribute[20] = 0x00;
+	return 0;
+}
+
+static void vgaHWLock(struct vgastate *state)
+{
+	/* Protect CRTC[0-7] */
+	vga_wcrt(state->vgabase, 0x11, vga_rcrt(state->vgabase, 0x11) | 0x80);
+}
+
+static void vgaHWUnlock(void)
+{
+	/* Unprotect CRTC[0-7] */
+	vga_wcrt(NULL, 0x11, vga_rcrt(NULL, 0x11) & ~0x80);
+}
+
+static void neoLock(struct vgastate *state)
+{
+	vga_wgfx(state->vgabase, 0x09, 0x00);
+	vgaHWLock(state);
+}
+
+static void neoUnlock(void)
+{
+	vgaHWUnlock();
+	vga_wgfx(NULL, 0x09, 0x26);
+}
+
+/*
+ * VGA Palette management
+ */
+static int paletteEnabled = 0;
+
+static inline void VGAenablePalette(void)
+{
+	vga_r(NULL, VGA_IS1_RC);
+	vga_w(NULL, VGA_ATT_W, 0x00);
+	paletteEnabled = 1;
+}
+
+static inline void VGAdisablePalette(void)
+{
+	vga_r(NULL, VGA_IS1_RC);
+	vga_w(NULL, VGA_ATT_W, 0x20);
+	paletteEnabled = 0;
+}
+
+static inline void VGAwATTR(u8 index, u8 value)
+{
+	if (paletteEnabled)
+		index &= ~0x20;
+	else
+		index |= 0x20;
+
+	vga_r(NULL, VGA_IS1_RC);
+	vga_wattr(NULL, index, value);
+}
+
+static void vgaHWProtect(int on)
+{
+	unsigned char tmp;
+
+	tmp = vga_rseq(NULL, 0x01);
+	if (on) {
+		/*
+		 * Turn off screen and disable sequencer.
+		 */
+		vga_wseq(NULL, 0x00, 0x01);		/* Synchronous Reset */
+		vga_wseq(NULL, 0x01, tmp | 0x20);	/* disable the display */
+
+		VGAenablePalette();
+	} else {
+		/*
+		 * Reenable sequencer, then turn on screen.
+		 */
+		vga_wseq(NULL, 0x01, tmp & ~0x20);	/* reenable display */
+		vga_wseq(NULL, 0x00, 0x03);		/* clear synchronousreset */
+
+		VGAdisablePalette();
+	}
+}
+
+static void vgaHWRestore(const struct fb_info *info,
+			 const struct neofb_par *par)
+{
+	int i;
+
+	vga_w(NULL, VGA_MIS_W, par->MiscOutReg);
+
+	for (i = 1; i < 5; i++)
+		vga_wseq(NULL, i, par->Sequencer[i]);
+
+	/* Ensure CRTC registers 0-7 are unlocked by clearing bit 7 or CRTC[17] */
+	vga_wcrt(NULL, 17, par->CRTC[17] & ~0x80);
+
+	for (i = 0; i < 25; i++)
+		vga_wcrt(NULL, i, par->CRTC[i]);
+
+	for (i = 0; i < 9; i++)
+		vga_wgfx(NULL, i, par->Graphics[i]);
+
+	VGAenablePalette();
+
+	for (i = 0; i < 21; i++)
+		VGAwATTR(i, par->Attribute[i]);
+
+	VGAdisablePalette();
+}
+
+
+/* -------------------- Hardware specific routines ------------------------- */
+
+/*
+ * Hardware Acceleration for Neo2200+
+ */
+static inline int neo2200_sync(struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+
+	while (readl(&par->neo2200->bltStat) & 1)
+		cpu_relax();
+	return 0;
+}
+
+static inline void neo2200_wait_fifo(struct fb_info *info,
+				     int requested_fifo_space)
+{
+	//  ndev->neo.waitfifo_calls++;
+	//  ndev->neo.waitfifo_sum += requested_fifo_space;
+
+	/* FIXME: does not work
+	   if (neo_fifo_space < requested_fifo_space)
+	   {
+	   neo_fifo_waitcycles++;
+
+	   while (1)
+	   {
+	   neo_fifo_space = (neo2200->bltStat >> 8);
+	   if (neo_fifo_space >= requested_fifo_space)
+	   break;
+	   }
+	   }
+	   else
+	   {
+	   neo_fifo_cache_hits++;
+	   }
+
+	   neo_fifo_space -= requested_fifo_space;
+	 */
+
+	neo2200_sync(info);
+}
+
+static inline void neo2200_accel_init(struct fb_info *info,
+				      struct fb_var_screeninfo *var)
+{
+	struct neofb_par *par = info->par;
+	Neo2200 __iomem *neo2200 = par->neo2200;
+	u32 bltMod, pitch;
+
+	neo2200_sync(info);
+
+	switch (var->bits_per_pixel) {
+	case 8:
+		bltMod = NEO_MODE1_DEPTH8;
+		pitch = var->xres_virtual;
+		break;
+	case 15:
+	case 16:
+		bltMod = NEO_MODE1_DEPTH16;
+		pitch = var->xres_virtual * 2;
+		break;
+	case 24:
+		bltMod = NEO_MODE1_DEPTH24;
+		pitch = var->xres_virtual * 3;
+		break;
+	default:
+		printk(KERN_ERR
+		       "neofb: neo2200_accel_init: unexpected bits per pixel!\n");
+		return;
+	}
+
+	writel(bltMod << 16, &neo2200->bltStat);
+	writel((pitch << 16) | pitch, &neo2200->pitch);
+}
+
+/* --------------------------------------------------------------------- */
+
+static int
+neofb_open(struct fb_info *info, int user)
+{
+	struct neofb_par *par = info->par;
+
+	if (!par->ref_count) {
+		memset(&par->state, 0, sizeof(struct vgastate));
+		par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS;
+		save_vga(&par->state);
+	}
+	par->ref_count++;
+
+	return 0;
+}
+
+static int
+neofb_release(struct fb_info *info, int user)
+{
+	struct neofb_par *par = info->par;
+
+	if (!par->ref_count)
+		return -EINVAL;
+
+	if (par->ref_count == 1) {
+		restore_vga(&par->state);
+	}
+	par->ref_count--;
+
+	return 0;
+}
+
+static int
+neofb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+	int memlen, vramlen;
+	int mode_ok = 0;
+
+	DBG("neofb_check_var");
+
+	if (!var->pixclock || PICOS2KHZ(var->pixclock) > par->maxClock)
+		return -EINVAL;
+
+	/* Is the mode larger than the LCD panel? */
+	if (par->internal_display &&
+            ((var->xres > par->NeoPanelWidth) ||
+	     (var->yres > par->NeoPanelHeight))) {
+		printk(KERN_INFO
+		       "Mode (%dx%d) larger than the LCD panel (%dx%d)\n",
+		       var->xres, var->yres, par->NeoPanelWidth,
+		       par->NeoPanelHeight);
+		return -EINVAL;
+	}
+
+	/* Is the mode one of the acceptable sizes? */
+	if (!par->internal_display)
+		mode_ok = 1;
+	else {
+		switch (var->xres) {
+		case 1280:
+			if (var->yres == 1024)
+				mode_ok = 1;
+			break;
+		case 1024:
+			if (var->yres == 768)
+				mode_ok = 1;
+			break;
+		case 800:
+			if (var->yres == (par->libretto ? 480 : 600))
+				mode_ok = 1;
+			break;
+		case 640:
+			if (var->yres == 480)
+				mode_ok = 1;
+			break;
+		}
+	}
+
+	if (!mode_ok) {
+		printk(KERN_INFO
+		       "Mode (%dx%d) won't display properly on LCD\n",
+		       var->xres, var->yres);
+		return -EINVAL;
+	}
+
+	var->red.msb_right = 0;
+	var->green.msb_right = 0;
+	var->blue.msb_right = 0;
+	var->transp.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 */
+		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;
+
+	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;
+
+#ifdef NO_32BIT_SUPPORT_YET
+	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;
+#endif
+	default:
+		printk(KERN_WARNING "neofb: no support for %dbpp\n",
+		       var->bits_per_pixel);
+		return -EINVAL;
+	}
+
+	vramlen = info->fix.smem_len;
+	if (vramlen > 4 * 1024 * 1024)
+		vramlen = 4 * 1024 * 1024;
+
+	if (var->xres_virtual < var->xres)
+		var->xres_virtual = var->xres;
+
+	memlen = var->xres_virtual * var->bits_per_pixel * var->yres_virtual >> 3;
+
+	if (memlen > vramlen) {
+		var->yres_virtual =  vramlen * 8 / (var->xres_virtual *
+				   	var->bits_per_pixel);
+		memlen = var->xres_virtual * var->bits_per_pixel *
+				var->yres_virtual / 8;
+	}
+
+	/* we must round yres/xres down, we already rounded y/xres_virtual up
+	   if it was possible. We should return -EINVAL, but I disagree */
+	if (var->yres_virtual < var->yres)
+		var->yres = var->yres_virtual;
+	if (var->xoffset + var->xres > var->xres_virtual)
+		var->xoffset = var->xres_virtual - var->xres;
+	if (var->yoffset + var->yres > var->yres_virtual)
+		var->yoffset = var->yres_virtual - var->yres;
+
+	var->nonstd = 0;
+	var->height = -1;
+	var->width = -1;
+
+	if (var->bits_per_pixel >= 24 || !par->neo2200)
+		var->accel_flags &= ~FB_ACCELF_TEXT;
+	return 0;
+}
+
+static int neofb_set_par(struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+	unsigned char temp;
+	int i, clock_hi = 0;
+	int lcd_stretch;
+	int hoffset, voffset;
+	int vsync_start, vtotal;
+
+	DBG("neofb_set_par");
+
+	neoUnlock();
+
+	vgaHWProtect(1);	/* Blank the screen */
+
+	vsync_start = info->var.yres + info->var.lower_margin;
+	vtotal = vsync_start + info->var.vsync_len + info->var.upper_margin;
+
+	/*
+	 * This will allocate the datastructure and initialize all of the
+	 * generic VGA registers.
+	 */
+
+	if (vgaHWInit(&info->var, par))
+		return -EINVAL;
+
+	/*
+	 * The default value assigned by vgaHW.c is 0x41, but this does
+	 * not work for NeoMagic.
+	 */
+	par->Attribute[16] = 0x01;
+
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		par->CRTC[0x13] = info->var.xres_virtual >> 3;
+		par->ExtCRTOffset = info->var.xres_virtual >> 11;
+		par->ExtColorModeSelect = 0x11;
+		break;
+	case 16:
+		par->CRTC[0x13] = info->var.xres_virtual >> 2;
+		par->ExtCRTOffset = info->var.xres_virtual >> 10;
+		par->ExtColorModeSelect = 0x13;
+		break;
+	case 24:
+		par->CRTC[0x13] = (info->var.xres_virtual * 3) >> 3;
+		par->ExtCRTOffset = (info->var.xres_virtual * 3) >> 11;
+		par->ExtColorModeSelect = 0x14;
+		break;
+#ifdef NO_32BIT_SUPPORT_YET
+	case 32:		/* FIXME: guessed values */
+		par->CRTC[0x13] = info->var.xres_virtual >> 1;
+		par->ExtCRTOffset = info->var.xres_virtual >> 9;
+		par->ExtColorModeSelect = 0x15;
+		break;
+#endif
+	default:
+		break;
+	}
+
+	par->ExtCRTDispAddr = 0x10;
+
+	/* Vertical Extension */
+	par->VerticalExt = (((vtotal - 2) & 0x400) >> 10)
+	    | (((info->var.yres - 1) & 0x400) >> 9)
+	    | (((vsync_start) & 0x400) >> 8)
+	    | (((vsync_start) & 0x400) >> 7);
+
+	/* Fast write bursts on unless disabled. */
+	if (par->pci_burst)
+		par->SysIfaceCntl1 = 0x30;
+	else
+		par->SysIfaceCntl1 = 0x00;
+
+	par->SysIfaceCntl2 = 0xc0;	/* VESA Bios sets this to 0x80! */
+
+	/* Initialize: by default, we want display config register to be read */
+	par->PanelDispCntlRegRead = 1;
+
+	/* Enable any user specified display devices. */
+	par->PanelDispCntlReg1 = 0x00;
+	if (par->internal_display)
+		par->PanelDispCntlReg1 |= 0x02;
+	if (par->external_display)
+		par->PanelDispCntlReg1 |= 0x01;
+
+	/* If the user did not specify any display devices, then... */
+	if (par->PanelDispCntlReg1 == 0x00) {
+		/* Default to internal (i.e., LCD) only. */
+		par->PanelDispCntlReg1 = vga_rgfx(NULL, 0x20) & 0x03;
+	}
+
+	/* If we are using a fixed mode, then tell the chip we are. */
+	switch (info->var.xres) {
+	case 1280:
+		par->PanelDispCntlReg1 |= 0x60;
+		break;
+	case 1024:
+		par->PanelDispCntlReg1 |= 0x40;
+		break;
+	case 800:
+		par->PanelDispCntlReg1 |= 0x20;
+		break;
+	case 640:
+	default:
+		break;
+	}
+
+	/* Setup shadow register locking. */
+	switch (par->PanelDispCntlReg1 & 0x03) {
+	case 0x01:		/* External CRT only mode: */
+		par->GeneralLockReg = 0x00;
+		/* We need to program the VCLK for external display only mode. */
+		par->ProgramVCLK = 1;
+		break;
+	case 0x02:		/* Internal LCD only mode: */
+	case 0x03:		/* Simultaneous internal/external (LCD/CRT) mode: */
+		par->GeneralLockReg = 0x01;
+		/* Don't program the VCLK when using the LCD. */
+		par->ProgramVCLK = 0;
+		break;
+	}
+
+	/*
+	 * If the screen is to be stretched, turn on stretching for the
+	 * various modes.
+	 *
+	 * OPTION_LCD_STRETCH means stretching should be turned off!
+	 */
+	par->PanelDispCntlReg2 = 0x00;
+	par->PanelDispCntlReg3 = 0x00;
+
+	if (par->lcd_stretch && (par->PanelDispCntlReg1 == 0x02) &&	/* LCD only */
+	    (info->var.xres != par->NeoPanelWidth)) {
+		switch (info->var.xres) {
+		case 320:	/* Needs testing.  KEM -- 24 May 98 */
+		case 400:	/* Needs testing.  KEM -- 24 May 98 */
+		case 640:
+		case 800:
+		case 1024:
+			lcd_stretch = 1;
+			par->PanelDispCntlReg2 |= 0xC6;
+			break;
+		default:
+			lcd_stretch = 0;
+			/* No stretching in these modes. */
+		}
+	} else
+		lcd_stretch = 0;
+
+	/*
+	 * If the screen is to be centerd, turn on the centering for the
+	 * various modes.
+	 */
+	par->PanelVertCenterReg1 = 0x00;
+	par->PanelVertCenterReg2 = 0x00;
+	par->PanelVertCenterReg3 = 0x00;
+	par->PanelVertCenterReg4 = 0x00;
+	par->PanelVertCenterReg5 = 0x00;
+	par->PanelHorizCenterReg1 = 0x00;
+	par->PanelHorizCenterReg2 = 0x00;
+	par->PanelHorizCenterReg3 = 0x00;
+	par->PanelHorizCenterReg4 = 0x00;
+	par->PanelHorizCenterReg5 = 0x00;
+
+
+	if (par->PanelDispCntlReg1 & 0x02) {
+		if (info->var.xres == par->NeoPanelWidth) {
+			/*
+			 * No centering required when the requested display width
+			 * equals the panel width.
+			 */
+		} else {
+			par->PanelDispCntlReg2 |= 0x01;
+			par->PanelDispCntlReg3 |= 0x10;
+
+			/* Calculate the horizontal and vertical offsets. */
+			if (!lcd_stretch) {
+				hoffset =
+				    ((par->NeoPanelWidth -
+				      info->var.xres) >> 4) - 1;
+				voffset =
+				    ((par->NeoPanelHeight -
+				      info->var.yres) >> 1) - 2;
+			} else {
+				/* Stretched modes cannot be centered. */
+				hoffset = 0;
+				voffset = 0;
+			}
+
+			switch (info->var.xres) {
+			case 320:	/* Needs testing.  KEM -- 24 May 98 */
+				par->PanelHorizCenterReg3 = hoffset;
+				par->PanelVertCenterReg2 = voffset;
+				break;
+			case 400:	/* Needs testing.  KEM -- 24 May 98 */
+				par->PanelHorizCenterReg4 = hoffset;
+				par->PanelVertCenterReg1 = voffset;
+				break;
+			case 640:
+				par->PanelHorizCenterReg1 = hoffset;
+				par->PanelVertCenterReg3 = voffset;
+				break;
+			case 800:
+				par->PanelHorizCenterReg2 = hoffset;
+				par->PanelVertCenterReg4 = voffset;
+				break;
+			case 1024:
+				par->PanelHorizCenterReg5 = hoffset;
+				par->PanelVertCenterReg5 = voffset;
+				break;
+			case 1280:
+			default:
+				/* No centering in these modes. */
+				break;
+			}
+		}
+	}
+
+	par->biosMode =
+	    neoFindMode(info->var.xres, info->var.yres,
+			info->var.bits_per_pixel);
+
+	/*
+	 * Calculate the VCLK that most closely matches the requested dot
+	 * clock.
+	 */
+	neoCalcVCLK(info, par, PICOS2KHZ(info->var.pixclock));
+
+	/* Since we program the clocks ourselves, always use VCLK3. */
+	par->MiscOutReg |= 0x0C;
+
+	/* alread unlocked above */
+	/* BOGUS  vga_wgfx(NULL, 0x09, 0x26); */
+
+	/* don't know what this is, but it's 0 from bootup anyway */
+	vga_wgfx(NULL, 0x15, 0x00);
+
+	/* was set to 0x01 by my bios in text and vesa modes */
+	vga_wgfx(NULL, 0x0A, par->GeneralLockReg);
+
+	/*
+	 * The color mode needs to be set before calling vgaHWRestore
+	 * to ensure the DAC is initialized properly.
+	 *
+	 * NOTE: Make sure we don't change bits make sure we don't change
+	 * any reserved bits.
+	 */
+	temp = vga_rgfx(NULL, 0x90);
+	switch (info->fix.accel) {
+	case FB_ACCEL_NEOMAGIC_NM2070:
+		temp &= 0xF0;	/* Save bits 7:4 */
+		temp |= (par->ExtColorModeSelect & ~0xF0);
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2090:
+	case FB_ACCEL_NEOMAGIC_NM2093:
+	case FB_ACCEL_NEOMAGIC_NM2097:
+	case FB_ACCEL_NEOMAGIC_NM2160:
+	case FB_ACCEL_NEOMAGIC_NM2200:
+	case FB_ACCEL_NEOMAGIC_NM2230:
+	case FB_ACCEL_NEOMAGIC_NM2360:
+	case FB_ACCEL_NEOMAGIC_NM2380:
+		temp &= 0x70;	/* Save bits 6:4 */
+		temp |= (par->ExtColorModeSelect & ~0x70);
+		break;
+	}
+
+	vga_wgfx(NULL, 0x90, temp);
+
+	/*
+	 * In some rare cases a lockup might occur if we don't delay
+	 * here. (Reported by Miles Lane)
+	 */
+	//mdelay(200);
+
+	/*
+	 * Disable horizontal and vertical graphics and text expansions so
+	 * that vgaHWRestore works properly.
+	 */
+	temp = vga_rgfx(NULL, 0x25);
+	temp &= 0x39;
+	vga_wgfx(NULL, 0x25, temp);
+
+	/*
+	 * Sleep for 200ms to make sure that the two operations above have
+	 * had time to take effect.
+	 */
+	mdelay(200);
+
+	/*
+	 * This function handles restoring the generic VGA registers.  */
+	vgaHWRestore(info, par);
+
+	/* linear colormap for non palettized modes */
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		/* PseudoColor, 256 */
+		info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
+		break;
+	case 16:
+		/* TrueColor, 64k */
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+
+		for (i = 0; i < 64; i++) {
+			outb(i, 0x3c8);
+
+			outb(i << 1, 0x3c9);
+			outb(i, 0x3c9);
+			outb(i << 1, 0x3c9);
+		}
+		break;
+	case 24:
+#ifdef NO_32BIT_SUPPORT_YET
+	case 32:
+#endif
+		/* TrueColor, 16m */
+		info->fix.visual = FB_VISUAL_TRUECOLOR;
+
+		for (i = 0; i < 256; i++) {
+			outb(i, 0x3c8);
+
+			outb(i, 0x3c9);
+			outb(i, 0x3c9);
+			outb(i, 0x3c9);
+		}
+		break;
+	}
+
+	vga_wgfx(NULL, 0x0E, par->ExtCRTDispAddr);
+	vga_wgfx(NULL, 0x0F, par->ExtCRTOffset);
+	temp = vga_rgfx(NULL, 0x10);
+	temp &= 0x0F;		/* Save bits 3:0 */
+	temp |= (par->SysIfaceCntl1 & ~0x0F);	/* VESA Bios sets bit 1! */
+	vga_wgfx(NULL, 0x10, temp);
+
+	vga_wgfx(NULL, 0x11, par->SysIfaceCntl2);
+	vga_wgfx(NULL, 0x15, 0 /*par->SingleAddrPage */ );
+	vga_wgfx(NULL, 0x16, 0 /*par->DualAddrPage */ );
+
+	temp = vga_rgfx(NULL, 0x20);
+	switch (info->fix.accel) {
+	case FB_ACCEL_NEOMAGIC_NM2070:
+		temp &= 0xFC;	/* Save bits 7:2 */
+		temp |= (par->PanelDispCntlReg1 & ~0xFC);
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2090:
+	case FB_ACCEL_NEOMAGIC_NM2093:
+	case FB_ACCEL_NEOMAGIC_NM2097:
+	case FB_ACCEL_NEOMAGIC_NM2160:
+		temp &= 0xDC;	/* Save bits 7:6,4:2 */
+		temp |= (par->PanelDispCntlReg1 & ~0xDC);
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2200:
+	case FB_ACCEL_NEOMAGIC_NM2230:
+	case FB_ACCEL_NEOMAGIC_NM2360:
+	case FB_ACCEL_NEOMAGIC_NM2380:
+		temp &= 0x98;	/* Save bits 7,4:3 */
+		temp |= (par->PanelDispCntlReg1 & ~0x98);
+		break;
+	}
+	vga_wgfx(NULL, 0x20, temp);
+
+	temp = vga_rgfx(NULL, 0x25);
+	temp &= 0x38;		/* Save bits 5:3 */
+	temp |= (par->PanelDispCntlReg2 & ~0x38);
+	vga_wgfx(NULL, 0x25, temp);
+
+	if (info->fix.accel != FB_ACCEL_NEOMAGIC_NM2070) {
+		temp = vga_rgfx(NULL, 0x30);
+		temp &= 0xEF;	/* Save bits 7:5 and bits 3:0 */
+		temp |= (par->PanelDispCntlReg3 & ~0xEF);
+		vga_wgfx(NULL, 0x30, temp);
+	}
+
+	vga_wgfx(NULL, 0x28, par->PanelVertCenterReg1);
+	vga_wgfx(NULL, 0x29, par->PanelVertCenterReg2);
+	vga_wgfx(NULL, 0x2a, par->PanelVertCenterReg3);
+
+	if (info->fix.accel != FB_ACCEL_NEOMAGIC_NM2070) {
+		vga_wgfx(NULL, 0x32, par->PanelVertCenterReg4);
+		vga_wgfx(NULL, 0x33, par->PanelHorizCenterReg1);
+		vga_wgfx(NULL, 0x34, par->PanelHorizCenterReg2);
+		vga_wgfx(NULL, 0x35, par->PanelHorizCenterReg3);
+	}
+
+	if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2160)
+		vga_wgfx(NULL, 0x36, par->PanelHorizCenterReg4);
+
+	if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2200 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2230 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2360 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2380) {
+		vga_wgfx(NULL, 0x36, par->PanelHorizCenterReg4);
+		vga_wgfx(NULL, 0x37, par->PanelVertCenterReg5);
+		vga_wgfx(NULL, 0x38, par->PanelHorizCenterReg5);
+
+		clock_hi = 1;
+	}
+
+	/* Program VCLK3 if needed. */
+	if (par->ProgramVCLK && ((vga_rgfx(NULL, 0x9B) != par->VCLK3NumeratorLow)
+				 || (vga_rgfx(NULL, 0x9F) != par->VCLK3Denominator)
+				 || (clock_hi && ((vga_rgfx(NULL, 0x8F) & ~0x0f)
+						  != (par->VCLK3NumeratorHigh &
+						      ~0x0F))))) {
+		vga_wgfx(NULL, 0x9B, par->VCLK3NumeratorLow);
+		if (clock_hi) {
+			temp = vga_rgfx(NULL, 0x8F);
+			temp &= 0x0F;	/* Save bits 3:0 */
+			temp |= (par->VCLK3NumeratorHigh & ~0x0F);
+			vga_wgfx(NULL, 0x8F, temp);
+		}
+		vga_wgfx(NULL, 0x9F, par->VCLK3Denominator);
+	}
+
+	if (par->biosMode)
+		vga_wcrt(NULL, 0x23, par->biosMode);
+
+	vga_wgfx(NULL, 0x93, 0xc0);	/* Gives 5x faster framebuffer writes !!! */
+
+	/* Program vertical extension register */
+	if (info->fix.accel == FB_ACCEL_NEOMAGIC_NM2200 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2230 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2360 ||
+	    info->fix.accel == FB_ACCEL_NEOMAGIC_NM2380) {
+		vga_wcrt(NULL, 0x70, par->VerticalExt);
+	}
+
+	vgaHWProtect(0);	/* Turn on screen */
+
+	/* Calling this also locks offset registers required in update_start */
+	neoLock(&par->state);
+
+	info->fix.line_length =
+	    info->var.xres_virtual * (info->var.bits_per_pixel >> 3);
+
+	switch (info->fix.accel) {
+		case FB_ACCEL_NEOMAGIC_NM2200:
+		case FB_ACCEL_NEOMAGIC_NM2230:
+		case FB_ACCEL_NEOMAGIC_NM2360:
+		case FB_ACCEL_NEOMAGIC_NM2380:
+			neo2200_accel_init(info, &info->var);
+			break;
+		default:
+			break;
+	}
+	return 0;
+}
+
+/*
+ *    Pan or Wrap the Display
+ */
+static int neofb_pan_display(struct fb_var_screeninfo *var,
+			     struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+	struct vgastate *state = &par->state;
+	int oldExtCRTDispAddr;
+	int Base;
+
+	DBG("neofb_update_start");
+
+	Base = (var->yoffset * info->var.xres_virtual + var->xoffset) >> 2;
+	Base *= (info->var.bits_per_pixel + 7) / 8;
+
+	neoUnlock();
+
+	/*
+	 * These are the generic starting address registers.
+	 */
+	vga_wcrt(state->vgabase, 0x0C, (Base & 0x00FF00) >> 8);
+	vga_wcrt(state->vgabase, 0x0D, (Base & 0x00FF));
+
+	/*
+	 * Make sure we don't clobber some other bits that might already
+	 * have been set. NOTE: NM2200 has a writable bit 3, but it shouldn't
+	 * be needed.
+	 */
+	oldExtCRTDispAddr = vga_rgfx(NULL, 0x0E);
+	vga_wgfx(state->vgabase, 0x0E, (((Base >> 16) & 0x0f) | (oldExtCRTDispAddr & 0xf0)));
+
+	neoLock(state);
+
+	return 0;
+}
+
+static int neofb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+			   u_int transp, struct fb_info *fb)
+{
+	if (regno >= fb->cmap.len || regno > 255)
+		return -EINVAL;
+
+	if (fb->var.bits_per_pixel <= 8) {
+		outb(regno, 0x3c8);
+
+		outb(red >> 10, 0x3c9);
+		outb(green >> 10, 0x3c9);
+		outb(blue >> 10, 0x3c9);
+	} else if (regno < 16) {
+		switch (fb->var.bits_per_pixel) {
+		case 16:
+			((u32 *) fb->pseudo_palette)[regno] =
+				((red & 0xf800)) | ((green & 0xfc00) >> 5) |
+				((blue & 0xf800) >> 11);
+			break;
+		case 24:
+			((u32 *) fb->pseudo_palette)[regno] =
+				((red & 0xff00) << 8) | ((green & 0xff00)) |
+				((blue & 0xff00) >> 8);
+			break;
+#ifdef NO_32BIT_SUPPORT_YET
+		case 32:
+			((u32 *) fb->pseudo_palette)[regno] =
+				((transp & 0xff00) << 16) | ((red & 0xff00) << 8) |
+				((green & 0xff00)) | ((blue & 0xff00) >> 8);
+			break;
+#endif
+		default:
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ *    (Un)Blank the display.
+ */
+static int neofb_blank(int blank_mode, struct fb_info *info)
+{
+	/*
+	 *  Blank the screen if blank_mode != 0, else unblank.
+	 *  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 for monitors, and backlight control on LCDs.
+	 *    blank_mode == 0: unblanked (backlight on)
+	 *    blank_mode == 1: blank (backlight on)
+	 *    blank_mode == 2: suspend vsync (backlight off)
+	 *    blank_mode == 3: suspend hsync (backlight off)
+	 *    blank_mode == 4: powerdown (backlight off)
+	 *
+	 *  wms...Enable VESA DPMS compatible powerdown mode
+	 *  run "setterm -powersave powerdown" to take advantage
+	 */
+	struct neofb_par *par = info->par;
+	int seqflags, lcdflags, dpmsflags, reg, tmpdisp;
+
+	/*
+	 * Read back the register bits related to display configuration. They might
+	 * have been changed underneath the driver via Fn key stroke.
+	 */
+	neoUnlock();
+	tmpdisp = vga_rgfx(NULL, 0x20) & 0x03;
+	neoLock(&par->state);
+
+	/* In case we blank the screen, we want to store the possibly new
+	 * configuration in the driver. During un-blank, we re-apply this setting,
+	 * since the LCD bit will be cleared in order to switch off the backlight.
+	 */
+	if (par->PanelDispCntlRegRead) {
+		par->PanelDispCntlReg1 = tmpdisp;
+	}
+	par->PanelDispCntlRegRead = !blank_mode;
+
+	switch (blank_mode) {
+	case FB_BLANK_POWERDOWN:	/* powerdown - both sync lines down */
+		seqflags = VGA_SR01_SCREEN_OFF; /* Disable sequencer */
+		lcdflags = 0;			/* LCD off */
+		dpmsflags = NEO_GR01_SUPPRESS_HSYNC |
+			    NEO_GR01_SUPPRESS_VSYNC;
+#ifdef CONFIG_TOSHIBA
+		/* Do we still need this ? */
+		/* attempt to turn off backlight on toshiba; also turns off external */
+		{
+			SMMRegisters regs;
+
+			regs.eax = 0xff00; /* HCI_SET */
+			regs.ebx = 0x0002; /* HCI_BACKLIGHT */
+			regs.ecx = 0x0000; /* HCI_DISABLE */
+			tosh_smm(&regs);
+		}
+#endif
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:		/* hsync off */
+		seqflags = VGA_SR01_SCREEN_OFF;	/* Disable sequencer */
+		lcdflags = 0;			/* LCD off */
+		dpmsflags = NEO_GR01_SUPPRESS_HSYNC;
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:		/* vsync off */
+		seqflags = VGA_SR01_SCREEN_OFF;	/* Disable sequencer */
+		lcdflags = 0;			/* LCD off */
+		dpmsflags = NEO_GR01_SUPPRESS_VSYNC;
+		break;
+	case FB_BLANK_NORMAL:		/* just blank screen (backlight stays on) */
+		seqflags = VGA_SR01_SCREEN_OFF;	/* Disable sequencer */
+		/*
+		 * During a blank operation with the LID shut, we might store "LCD off"
+		 * by mistake. Due to timing issues, the BIOS may switch the lights
+		 * back on, and we turn it back off once we "unblank".
+		 *
+		 * So here is an attempt to implement ">=" - if we are in the process
+		 * of unblanking, and the LCD bit is unset in the driver but set in the
+		 * register, we must keep it.
+		 */
+		lcdflags = ((par->PanelDispCntlReg1 | tmpdisp) & 0x02); /* LCD normal */
+		dpmsflags = 0x00;	/* no hsync/vsync suppression */
+		break;
+	case FB_BLANK_UNBLANK:		/* unblank */
+		seqflags = 0;			/* Enable sequencer */
+		lcdflags = ((par->PanelDispCntlReg1 | tmpdisp) & 0x02); /* LCD normal */
+		dpmsflags = 0x00;	/* no hsync/vsync suppression */
+#ifdef CONFIG_TOSHIBA
+		/* Do we still need this ? */
+		/* attempt to re-enable backlight/external on toshiba */
+		{
+			SMMRegisters regs;
+
+			regs.eax = 0xff00; /* HCI_SET */
+			regs.ebx = 0x0002; /* HCI_BACKLIGHT */
+			regs.ecx = 0x0001; /* HCI_ENABLE */
+			tosh_smm(&regs);
+		}
+#endif
+		break;
+	default:	/* Anything else we don't understand; return 1 to tell
+			 * fb_blank we didn't aactually do anything */
+		return 1;
+	}
+
+	neoUnlock();
+	reg = (vga_rseq(NULL, 0x01) & ~0x20) | seqflags;
+	vga_wseq(NULL, 0x01, reg);
+	reg = (vga_rgfx(NULL, 0x20) & ~0x02) | lcdflags;
+	vga_wgfx(NULL, 0x20, reg);
+	reg = (vga_rgfx(NULL, 0x01) & ~0xF0) | 0x80 | dpmsflags;
+	vga_wgfx(NULL, 0x01, reg);
+	neoLock(&par->state);
+	return 0;
+}
+
+static void
+neo2200_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	struct neofb_par *par = info->par;
+	u_long dst, rop;
+
+	dst = rect->dx + rect->dy * info->var.xres_virtual;
+	rop = rect->rop ? 0x060000 : 0x0c0000;
+
+	neo2200_wait_fifo(info, 4);
+
+	/* set blt control */
+	writel(NEO_BC3_FIFO_EN |
+	       NEO_BC0_SRC_IS_FG | NEO_BC3_SKIP_MAPPING |
+	       //               NEO_BC3_DST_XY_ADDR  |
+	       //               NEO_BC3_SRC_XY_ADDR  |
+	       rop, &par->neo2200->bltCntl);
+
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		writel(rect->color, &par->neo2200->fgColor);
+		break;
+	case 16:
+	case 24:
+		writel(((u32 *) (info->pseudo_palette))[rect->color],
+		       &par->neo2200->fgColor);
+		break;
+	}
+
+	writel(dst * ((info->var.bits_per_pixel + 7) >> 3),
+	       &par->neo2200->dstStart);
+	writel((rect->height << 16) | (rect->width & 0xffff),
+	       &par->neo2200->xyExt);
+}
+
+static void
+neo2200_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+	u32 sx = area->sx, sy = area->sy, dx = area->dx, dy = area->dy;
+	struct neofb_par *par = info->par;
+	u_long src, dst, bltCntl;
+
+	bltCntl = NEO_BC3_FIFO_EN | NEO_BC3_SKIP_MAPPING | 0x0C0000;
+
+	if ((dy > sy) || ((dy == sy) && (dx > sx))) {
+		/* Start with the lower right corner */
+		sy += (area->height - 1);
+		dy += (area->height - 1);
+		sx += (area->width - 1);
+		dx += (area->width - 1);
+
+		bltCntl |= NEO_BC0_X_DEC | NEO_BC0_DST_Y_DEC | NEO_BC0_SRC_Y_DEC;
+	}
+
+	src = sx * (info->var.bits_per_pixel >> 3) + sy*info->fix.line_length;
+	dst = dx * (info->var.bits_per_pixel >> 3) + dy*info->fix.line_length;
+
+	neo2200_wait_fifo(info, 4);
+
+	/* set blt control */
+	writel(bltCntl, &par->neo2200->bltCntl);
+
+	writel(src, &par->neo2200->srcStart);
+	writel(dst, &par->neo2200->dstStart);
+	writel((area->height << 16) | (area->width & 0xffff),
+	       &par->neo2200->xyExt);
+}
+
+static void
+neo2200_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct neofb_par *par = info->par;
+	int s_pitch = (image->width * image->depth + 7) >> 3;
+	int scan_align = info->pixmap.scan_align - 1;
+	int buf_align = info->pixmap.buf_align - 1;
+	int bltCntl_flags, d_pitch, data_len;
+
+	// The data is padded for the hardware
+	d_pitch = (s_pitch + scan_align) & ~scan_align;
+	data_len = ((d_pitch * image->height) + buf_align) & ~buf_align;
+
+	neo2200_sync(info);
+
+	if (image->depth == 1) {
+		if (info->var.bits_per_pixel == 24 && image->width < 16) {
+			/* FIXME. There is a bug with accelerated color-expanded
+			 * transfers in 24 bit mode if the image being transferred
+			 * is less than 16 bits wide. This is due to insufficient
+			 * padding when writing the image. We need to adjust
+			 * struct fb_pixmap. Not yet done. */
+			cfb_imageblit(info, image);
+			return;
+		}
+		bltCntl_flags = NEO_BC0_SRC_MONO;
+	} else if (image->depth == info->var.bits_per_pixel) {
+		bltCntl_flags = 0;
+	} else {
+		/* We don't currently support hardware acceleration if image
+		 * depth is different from display */
+		cfb_imageblit(info, image);
+		return;
+	}
+
+	switch (info->var.bits_per_pixel) {
+	case 8:
+		writel(image->fg_color, &par->neo2200->fgColor);
+		writel(image->bg_color, &par->neo2200->bgColor);
+		break;
+	case 16:
+	case 24:
+		writel(((u32 *) (info->pseudo_palette))[image->fg_color],
+		       &par->neo2200->fgColor);
+		writel(((u32 *) (info->pseudo_palette))[image->bg_color],
+		       &par->neo2200->bgColor);
+		break;
+	}
+
+	writel(NEO_BC0_SYS_TO_VID |
+		NEO_BC3_SKIP_MAPPING | bltCntl_flags |
+		// NEO_BC3_DST_XY_ADDR |
+		0x0c0000, &par->neo2200->bltCntl);
+
+	writel(0, &par->neo2200->srcStart);
+//      par->neo2200->dstStart = (image->dy << 16) | (image->dx & 0xffff);
+	writel(((image->dx & 0xffff) * (info->var.bits_per_pixel >> 3) +
+		image->dy * info->fix.line_length), &par->neo2200->dstStart);
+	writel((image->height << 16) | (image->width & 0xffff),
+	       &par->neo2200->xyExt);
+
+	memcpy_toio(par->mmio_vbase + 0x100000, image->data, data_len);
+}
+
+static void
+neofb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
+{
+	switch (info->fix.accel) {
+		case FB_ACCEL_NEOMAGIC_NM2200:
+		case FB_ACCEL_NEOMAGIC_NM2230:
+		case FB_ACCEL_NEOMAGIC_NM2360:
+		case FB_ACCEL_NEOMAGIC_NM2380:
+			neo2200_fillrect(info, rect);
+			break;
+		default:
+			cfb_fillrect(info, rect);
+			break;
+	}
+}
+
+static void
+neofb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
+{
+	switch (info->fix.accel) {
+		case FB_ACCEL_NEOMAGIC_NM2200:
+		case FB_ACCEL_NEOMAGIC_NM2230:
+		case FB_ACCEL_NEOMAGIC_NM2360:
+		case FB_ACCEL_NEOMAGIC_NM2380:
+			neo2200_copyarea(info, area);
+			break;
+		default:
+			cfb_copyarea(info, area);
+			break;
+	}
+}
+
+static void
+neofb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	switch (info->fix.accel) {
+		case FB_ACCEL_NEOMAGIC_NM2200:
+		case FB_ACCEL_NEOMAGIC_NM2230:
+		case FB_ACCEL_NEOMAGIC_NM2360:
+		case FB_ACCEL_NEOMAGIC_NM2380:
+			neo2200_imageblit(info, image);
+			break;
+		default:
+			cfb_imageblit(info, image);
+			break;
+	}
+}
+
+static int
+neofb_sync(struct fb_info *info)
+{
+	switch (info->fix.accel) {
+		case FB_ACCEL_NEOMAGIC_NM2200:
+		case FB_ACCEL_NEOMAGIC_NM2230:
+		case FB_ACCEL_NEOMAGIC_NM2360:
+		case FB_ACCEL_NEOMAGIC_NM2380:
+			neo2200_sync(info);
+			break;
+		default:
+			break;
+	}
+	return 0;
+}
+
+/*
+static void
+neofb_draw_cursor(struct fb_info *info, u8 *dst, u8 *src, unsigned int width)
+{
+	//memset_io(info->sprite.addr, 0xff, 1);
+}
+
+static int
+neofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+	struct neofb_par *par = (struct neofb_par *) info->par;
+
+	* Disable cursor *
+	write_le32(NEOREG_CURSCNTL, ~NEO_CURS_ENABLE, par);
+
+	if (cursor->set & FB_CUR_SETPOS) {
+		u32 x = cursor->image.dx;
+		u32 y = cursor->image.dy;
+
+		info->cursor.image.dx = x;
+		info->cursor.image.dy = y;
+		write_le32(NEOREG_CURSX, x, par);
+		write_le32(NEOREG_CURSY, y, par);
+	}
+
+	if (cursor->set & FB_CUR_SETSIZE) {
+		info->cursor.image.height = cursor->image.height;
+		info->cursor.image.width = cursor->image.width;
+	}
+
+	if (cursor->set & FB_CUR_SETHOT)
+		info->cursor.hot = cursor->hot;
+
+	if (cursor->set & FB_CUR_SETCMAP) {
+		if (cursor->image.depth == 1) {
+			u32 fg = cursor->image.fg_color;
+			u32 bg = cursor->image.bg_color;
+
+			info->cursor.image.fg_color = fg;
+			info->cursor.image.bg_color = bg;
+
+			fg = ((fg & 0xff0000) >> 16) | ((fg & 0xff) << 16) | (fg & 0xff00);
+			bg = ((bg & 0xff0000) >> 16) | ((bg & 0xff) << 16) | (bg & 0xff00);
+			write_le32(NEOREG_CURSFGCOLOR, fg, par);
+			write_le32(NEOREG_CURSBGCOLOR, bg, par);
+		}
+	}
+
+	if (cursor->set & FB_CUR_SETSHAPE)
+		fb_load_cursor_image(info);
+
+	if (info->cursor.enable)
+		write_le32(NEOREG_CURSCNTL, NEO_CURS_ENABLE, par);
+	return 0;
+}
+*/
+
+static const struct fb_ops neofb_ops = {
+	.owner		= THIS_MODULE,
+	.fb_open	= neofb_open,
+	.fb_release	= neofb_release,
+	__FB_DEFAULT_IOMEM_OPS_RDWR,
+	.fb_check_var	= neofb_check_var,
+	.fb_set_par	= neofb_set_par,
+	.fb_setcolreg	= neofb_setcolreg,
+	.fb_pan_display	= neofb_pan_display,
+	.fb_blank	= neofb_blank,
+	.fb_sync	= neofb_sync,
+	.fb_fillrect	= neofb_fillrect,
+	.fb_copyarea	= neofb_copyarea,
+	.fb_imageblit	= neofb_imageblit,
+	__FB_DEFAULT_IOMEM_OPS_MMAP,
+};
+
+/* --------------------------------------------------------------------- */
+
+static struct fb_videomode mode800x480 = {
+	.xres           = 800,
+	.yres           = 480,
+	.pixclock       = 25000,
+	.left_margin    = 88,
+	.right_margin   = 40,
+	.upper_margin   = 23,
+	.lower_margin   = 1,
+	.hsync_len      = 128,
+	.vsync_len      = 4,
+	.sync           = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
+	.vmode          = FB_VMODE_NONINTERLACED
+};
+
+static int neo_map_mmio(struct fb_info *info, struct pci_dev *dev)
+{
+	struct neofb_par *par = info->par;
+
+	DBG("neo_map_mmio");
+
+	switch (info->fix.accel) {
+		case FB_ACCEL_NEOMAGIC_NM2070:
+			info->fix.mmio_start = pci_resource_start(dev, 0)+
+				0x100000;
+			break;
+		case FB_ACCEL_NEOMAGIC_NM2090:
+		case FB_ACCEL_NEOMAGIC_NM2093:
+			info->fix.mmio_start = pci_resource_start(dev, 0)+
+				0x200000;
+			break;
+		case FB_ACCEL_NEOMAGIC_NM2160:
+		case FB_ACCEL_NEOMAGIC_NM2097:
+		case FB_ACCEL_NEOMAGIC_NM2200:
+		case FB_ACCEL_NEOMAGIC_NM2230:
+		case FB_ACCEL_NEOMAGIC_NM2360:
+		case FB_ACCEL_NEOMAGIC_NM2380:
+			info->fix.mmio_start = pci_resource_start(dev, 1);
+			break;
+		default:
+			info->fix.mmio_start = pci_resource_start(dev, 0);
+	}
+	info->fix.mmio_len = MMIO_SIZE;
+
+	if (!request_mem_region
+	    (info->fix.mmio_start, MMIO_SIZE, "memory mapped I/O")) {
+		printk("neofb: memory mapped IO in use\n");
+		return -EBUSY;
+	}
+
+	par->mmio_vbase = ioremap(info->fix.mmio_start, MMIO_SIZE);
+	if (!par->mmio_vbase) {
+		printk("neofb: unable to map memory mapped IO\n");
+		release_mem_region(info->fix.mmio_start,
+				   info->fix.mmio_len);
+		return -ENOMEM;
+	} else
+		printk(KERN_INFO "neofb: mapped io at %p\n",
+		       par->mmio_vbase);
+	return 0;
+}
+
+static void neo_unmap_mmio(struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+
+	DBG("neo_unmap_mmio");
+
+	iounmap(par->mmio_vbase);
+	par->mmio_vbase = NULL;
+
+	release_mem_region(info->fix.mmio_start,
+			   info->fix.mmio_len);
+}
+
+static int neo_map_video(struct fb_info *info, struct pci_dev *dev,
+			 int video_len)
+{
+	//unsigned long addr;
+	struct neofb_par *par = info->par;
+
+	DBG("neo_map_video");
+
+	info->fix.smem_start = pci_resource_start(dev, 0);
+	info->fix.smem_len = video_len;
+
+	if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
+				"frame buffer")) {
+		printk("neofb: frame buffer in use\n");
+		return -EBUSY;
+	}
+
+	info->screen_base =
+	    ioremap_wc(info->fix.smem_start, info->fix.smem_len);
+	if (!info->screen_base) {
+		printk("neofb: unable to map screen memory\n");
+		release_mem_region(info->fix.smem_start,
+				   info->fix.smem_len);
+		return -ENOMEM;
+	} else
+		printk(KERN_INFO "neofb: mapped framebuffer at %p\n",
+		       info->screen_base);
+
+	par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
+					  pci_resource_len(dev, 0));
+
+	/* Clear framebuffer, it's all white in memory after boot */
+	memset_io(info->screen_base, 0, info->fix.smem_len);
+
+	/* Allocate Cursor drawing pad.
+	info->fix.smem_len -= PAGE_SIZE;
+	addr = info->fix.smem_start + info->fix.smem_len;
+	write_le32(NEOREG_CURSMEMPOS, ((0x000f & (addr >> 10)) << 8) |
+					((0x0ff0 & (addr >> 10)) >> 4), par);
+	addr = (unsigned long) info->screen_base + info->fix.smem_len;
+	info->sprite.addr = (u8 *) addr; */
+	return 0;
+}
+
+static void neo_unmap_video(struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+
+	DBG("neo_unmap_video");
+
+	arch_phys_wc_del(par->wc_cookie);
+	iounmap(info->screen_base);
+	info->screen_base = NULL;
+
+	release_mem_region(info->fix.smem_start,
+			   info->fix.smem_len);
+}
+
+static int neo_scan_monitor(struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+	unsigned char type, display;
+	int w;
+
+	// Eventually we will have i2c support.
+	info->monspecs.modedb = kmalloc_obj(struct fb_videomode);
+	if (!info->monspecs.modedb)
+		return -ENOMEM;
+	info->monspecs.modedb_len = 1;
+
+	/* Determine the panel type */
+	vga_wgfx(NULL, 0x09, 0x26);
+	type = vga_rgfx(NULL, 0x21);
+	display = vga_rgfx(NULL, 0x20);
+	if (!par->internal_display && !par->external_display) {
+		par->internal_display = display & 2 || !(display & 3) ? 1 : 0;
+		par->external_display = display & 1;
+		printk (KERN_INFO "Autodetected %s display\n",
+			par->internal_display && par->external_display ? "simultaneous" :
+			par->internal_display ? "internal" : "external");
+	}
+
+	/* Determine panel width -- used in NeoValidMode. */
+	w = vga_rgfx(NULL, 0x20);
+	vga_wgfx(NULL, 0x09, 0x00);
+	switch ((w & 0x18) >> 3) {
+	case 0x00:
+		// 640x480@60
+		par->NeoPanelWidth = 640;
+		par->NeoPanelHeight = 480;
+		memcpy(info->monspecs.modedb, &vesa_modes[3], sizeof(struct fb_videomode));
+		break;
+	case 0x01:
+		par->NeoPanelWidth = 800;
+		if (par->libretto) {
+			par->NeoPanelHeight = 480;
+			memcpy(info->monspecs.modedb, &mode800x480, sizeof(struct fb_videomode));
+		} else {
+			// 800x600@60
+			par->NeoPanelHeight = 600;
+			memcpy(info->monspecs.modedb, &vesa_modes[8], sizeof(struct fb_videomode));
+		}
+		break;
+	case 0x02:
+		// 1024x768@60
+		par->NeoPanelWidth = 1024;
+		par->NeoPanelHeight = 768;
+		memcpy(info->monspecs.modedb, &vesa_modes[13], sizeof(struct fb_videomode));
+		break;
+	case 0x03:
+		/* 1280x1024@60 panel support needs to be added */
+#ifdef NOT_DONE
+		par->NeoPanelWidth = 1280;
+		par->NeoPanelHeight = 1024;
+		memcpy(info->monspecs.modedb, &vesa_modes[20], sizeof(struct fb_videomode));
+		break;
+#else
+		printk(KERN_ERR
+		       "neofb: Only 640x480, 800x600/480 and 1024x768 panels are currently supported\n");
+		kfree(info->monspecs.modedb);
+		return -1;
+#endif
+	default:
+		// 640x480@60
+		par->NeoPanelWidth = 640;
+		par->NeoPanelHeight = 480;
+		memcpy(info->monspecs.modedb, &vesa_modes[3], sizeof(struct fb_videomode));
+		break;
+	}
+
+	printk(KERN_INFO "Panel is a %dx%d %s %s display\n",
+	       par->NeoPanelWidth,
+	       par->NeoPanelHeight,
+	       (type & 0x02) ? "color" : "monochrome",
+	       (type & 0x10) ? "TFT" : "dual scan");
+	return 0;
+}
+
+static int neo_init_hw(struct fb_info *info)
+{
+	struct neofb_par *par = info->par;
+	int videoRam = 896;
+	int maxClock = 65000;
+	int CursorOff = 0x100;
+
+	DBG("neo_init_hw");
+
+	neoUnlock();
+
+#if 0
+	printk(KERN_DEBUG "--- Neo extended register dump ---\n");
+	for (int w = 0; w < 0x85; w++)
+		printk(KERN_DEBUG "CR %p: %p\n", (void *) w,
+		       (void *) vga_rcrt(NULL, w));
+	for (int w = 0; w < 0xC7; w++)
+		printk(KERN_DEBUG "GR %p: %p\n", (void *) w,
+		       (void *) vga_rgfx(NULL, w));
+#endif
+	switch (info->fix.accel) {
+	case FB_ACCEL_NEOMAGIC_NM2070:
+		videoRam = 896;
+		maxClock = 65000;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2090:
+	case FB_ACCEL_NEOMAGIC_NM2093:
+	case FB_ACCEL_NEOMAGIC_NM2097:
+		videoRam = 1152;
+		maxClock = 80000;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2160:
+		videoRam = 2048;
+		maxClock = 90000;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2200:
+		videoRam = 2560;
+		maxClock = 110000;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2230:
+		videoRam = 3008;
+		maxClock = 110000;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2360:
+		videoRam = 4096;
+		maxClock = 110000;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2380:
+		videoRam = 6144;
+		maxClock = 110000;
+		break;
+	}
+	switch (info->fix.accel) {
+	case FB_ACCEL_NEOMAGIC_NM2070:
+	case FB_ACCEL_NEOMAGIC_NM2090:
+	case FB_ACCEL_NEOMAGIC_NM2093:
+		CursorOff = 0x100;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2097:
+	case FB_ACCEL_NEOMAGIC_NM2160:
+		CursorOff = 0x100;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2200:
+	case FB_ACCEL_NEOMAGIC_NM2230:
+	case FB_ACCEL_NEOMAGIC_NM2360:
+	case FB_ACCEL_NEOMAGIC_NM2380:
+		CursorOff = 0x1000;
+
+		par->neo2200 = (Neo2200 __iomem *) par->mmio_vbase;
+		break;
+	}
+/*
+	info->sprite.size = CursorMem;
+	info->sprite.scan_align = 1;
+	info->sprite.buf_align = 1;
+	info->sprite.flags = FB_PIXMAP_IO;
+	info->sprite.outbuf = neofb_draw_cursor;
+*/
+	par->maxClock = maxClock;
+	par->cursorOff = CursorOff;
+	return videoRam * 1024;
+}
+
+
+static struct fb_info *neo_alloc_fb_info(struct pci_dev *dev,
+					 const struct pci_device_id *id)
+{
+	struct fb_info *info;
+	struct neofb_par *par;
+
+	info = framebuffer_alloc(sizeof(struct neofb_par), &dev->dev);
+
+	if (!info)
+		return NULL;
+
+	par = info->par;
+
+	info->fix.accel = id->driver_data;
+
+	par->pci_burst = !nopciburst;
+	par->lcd_stretch = !nostretch;
+	par->libretto = libretto;
+
+	par->internal_display = internal;
+	par->external_display = external;
+	info->flags = FBINFO_HWACCEL_YPAN;
+
+	switch (info->fix.accel) {
+	case FB_ACCEL_NEOMAGIC_NM2070:
+		strscpy(info->fix.id, "MagicGraph128", sizeof(info->fix.id));
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2090:
+		strscpy(info->fix.id, "MagicGraph128V", sizeof(info->fix.id));
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2093:
+		strscpy(info->fix.id, "MagicGraph128ZV", sizeof(info->fix.id));
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2097:
+		strscpy(info->fix.id, "Mag.Graph128ZV+", sizeof(info->fix.id));
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2160:
+		strscpy(info->fix.id, "MagicGraph128XD", sizeof(info->fix.id));
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2200:
+		strscpy(info->fix.id, "MagicGraph256AV", sizeof(info->fix.id));
+		info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
+		               FBINFO_HWACCEL_COPYAREA |
+                	       FBINFO_HWACCEL_FILLRECT;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2230:
+		strscpy(info->fix.id, "Mag.Graph256AV+", sizeof(info->fix.id));
+		info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
+		               FBINFO_HWACCEL_COPYAREA |
+                	       FBINFO_HWACCEL_FILLRECT;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2360:
+		strscpy(info->fix.id, "MagicGraph256ZX", sizeof(info->fix.id));
+		info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
+		               FBINFO_HWACCEL_COPYAREA |
+                	       FBINFO_HWACCEL_FILLRECT;
+		break;
+	case FB_ACCEL_NEOMAGIC_NM2380:
+		strscpy(info->fix.id, "Mag.Graph256XL+", sizeof(info->fix.id));
+		info->flags |= FBINFO_HWACCEL_IMAGEBLIT |
+		               FBINFO_HWACCEL_COPYAREA |
+                	       FBINFO_HWACCEL_FILLRECT;
+		break;
+	}
+
+	info->fix.type = FB_TYPE_PACKED_PIXELS;
+	info->fix.type_aux = 0;
+	info->fix.xpanstep = 0;
+	info->fix.ypanstep = 4;
+	info->fix.ywrapstep = 0;
+	info->fix.accel = id->driver_data;
+
+	info->fbops = &neofb_ops;
+	info->pseudo_palette = par->palette;
+	return info;
+}
+
+static void neo_free_fb_info(struct fb_info *info)
+{
+	if (info) {
+		/*
+		 * Free the colourmap
+		 */
+		fb_dealloc_cmap(&info->cmap);
+		framebuffer_release(info);
+	}
+}
+
+/* --------------------------------------------------------------------- */
+
+static int neofb_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+	struct fb_info *info;
+	u_int h_sync, v_sync;
+	int video_len, err;
+
+	DBG("neofb_probe");
+
+	err = aperture_remove_conflicting_pci_devices(dev, "neofb");
+	if (err)
+		return err;
+
+	err = pci_enable_device(dev);
+	if (err)
+		return err;
+
+	err = -ENOMEM;
+	info = neo_alloc_fb_info(dev, id);
+	if (!info)
+		return err;
+
+	err = neo_map_mmio(info, dev);
+	if (err)
+		goto err_map_mmio;
+
+	err = neo_scan_monitor(info);
+	if (err)
+		goto err_scan_monitor;
+
+	video_len = neo_init_hw(info);
+	if (video_len < 0) {
+		err = video_len;
+		goto err_init_hw;
+	}
+
+	err = neo_map_video(info, dev, video_len);
+	if (err)
+		goto err_init_hw;
+
+	if (!fb_find_mode(&info->var, info, mode_option, NULL, 0,
+			info->monspecs.modedb, 16)) {
+		printk(KERN_ERR "neofb: Unable to find usable video mode.\n");
+		err = -EINVAL;
+		goto err_map_video;
+	}
+
+	/*
+	 * 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 / info->var.pixclock;
+	h_sync =
+	    h_sync * 512 / (info->var.xres + info->var.left_margin +
+			    info->var.right_margin + info->var.hsync_len);
+	v_sync =
+	    h_sync / (info->var.yres + info->var.upper_margin +
+		      info->var.lower_margin + info->var.vsync_len);
+
+	printk(KERN_INFO "neofb v" NEOFB_VERSION
+	       ": %dkB VRAM, using %dx%d, %d.%03dkHz, %dHz\n",
+	       info->fix.smem_len >> 10, info->var.xres,
+	       info->var.yres, h_sync / 1000, h_sync % 1000, v_sync);
+
+	err = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (err < 0)
+		goto err_map_video;
+
+	err = register_framebuffer(info);
+	if (err < 0)
+		goto err_reg_fb;
+
+	fb_info(info, "%s frame buffer device\n", info->fix.id);
+
+	/*
+	 * Our driver data
+	 */
+	pci_set_drvdata(dev, info);
+	return 0;
+
+err_reg_fb:
+	fb_dealloc_cmap(&info->cmap);
+err_map_video:
+	neo_unmap_video(info);
+err_init_hw:
+	fb_destroy_modedb(info->monspecs.modedb);
+err_scan_monitor:
+	neo_unmap_mmio(info);
+err_map_mmio:
+	neo_free_fb_info(info);
+	return err;
+}
+
+static void neofb_remove(struct pci_dev *dev)
+{
+	struct fb_info *info = pci_get_drvdata(dev);
+
+	DBG("neofb_remove");
+
+	if (info) {
+		unregister_framebuffer(info);
+
+		neo_unmap_video(info);
+		fb_destroy_modedb(info->monspecs.modedb);
+		neo_unmap_mmio(info);
+		neo_free_fb_info(info);
+	}
+}
+
+static const struct pci_device_id neofb_devices[] = {
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2070), .driver_data = FB_ACCEL_NEOMAGIC_NM2070 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2090), .driver_data = FB_ACCEL_NEOMAGIC_NM2090 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2093), .driver_data = FB_ACCEL_NEOMAGIC_NM2093 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2097), .driver_data = FB_ACCEL_NEOMAGIC_NM2097 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2160), .driver_data = FB_ACCEL_NEOMAGIC_NM2160 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2200), .driver_data = FB_ACCEL_NEOMAGIC_NM2200 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2230), .driver_data = FB_ACCEL_NEOMAGIC_NM2230 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2360), .driver_data = FB_ACCEL_NEOMAGIC_NM2360 },
+
+	{ PCI_VDEVICE(NEOMAGIC, PCI_CHIP_NM2380), .driver_data = FB_ACCEL_NEOMAGIC_NM2380 },
+
+	{ }
+};
+
+MODULE_DEVICE_TABLE(pci, neofb_devices);
+
+static struct pci_driver neofb_driver = {
+	.name =		"neofb",
+	.id_table =	neofb_devices,
+	.probe =	neofb_probe,
+	.remove =	neofb_remove,
+};
+
+/* ************************* init in-kernel code ************************** */
+
+#ifndef MODULE
+static int __init neofb_setup(char *options)
+{
+	char *this_opt;
+
+	DBG("neofb_setup");
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt)
+			continue;
+
+		if (!strncmp(this_opt, "internal", 8))
+			internal = 1;
+		else if (!strncmp(this_opt, "external", 8))
+			external = 1;
+		else if (!strncmp(this_opt, "nostretch", 9))
+			nostretch = 1;
+		else if (!strncmp(this_opt, "nopciburst", 10))
+			nopciburst = 1;
+		else if (!strncmp(this_opt, "libretto", 8))
+			libretto = 1;
+		else
+			mode_option = this_opt;
+	}
+	return 0;
+}
+#endif  /*  MODULE  */
+
+static int __init neofb_init(void)
+{
+#ifndef MODULE
+	char *option = NULL;
+#endif
+
+	if (fb_modesetting_disabled("neofb"))
+		return -ENODEV;
+
+#ifndef MODULE
+	if (fb_get_options("neofb", &option))
+		return -ENODEV;
+	neofb_setup(option);
+#endif
+	return pci_register_driver(&neofb_driver);
+}
+
+module_init(neofb_init);
+
+#ifdef MODULE
+static void __exit neofb_exit(void)
+{
+	pci_unregister_driver(&neofb_driver);
+}
+
+module_exit(neofb_exit);
+#endif				/* MODULE */
-- 
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