From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001
From: Zeng Chi <zengchi@kylinos.cn>
Date: Mon, 21 Sep 2026 18:24:42 +0800
Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL
 attributes

Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.

Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 drivers/video/fbdev/pm2fb.c | 1855 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 1855 insertions(+)
 create mode 100644 drivers/video/fbdev/pm2fb.c

(limited to 'drivers/video/fbdev/pm2fb.c')

diff --git a/drivers/video/fbdev/pm2fb.c b/drivers/video/fbdev/pm2fb.c
new file mode 100644
index 000000000..058075a34
--- /dev/null
+++ b/drivers/video/fbdev/pm2fb.c
@@ -0,0 +1,1855 @@
+/*
+ * Permedia2 framebuffer driver.
+ *
+ * 2.5/2.6 driver:
+ * Copyright (c) 2003 Jim Hague (jim.hague@acm.org)
+ *
+ * based on 2.4 driver:
+ * Copyright (c) 1998-2000 Ilario Nardinocchi (nardinoc@CS.UniBO.IT)
+ * Copyright (c) 1999 Jakub Jelinek (jakub@redhat.com)
+ *
+ * and additional input from James Simmon's port of Hannu Mallat's tdfx
+ * driver.
+ *
+ * I have a Creative Graphics Blaster Exxtreme card - pm2fb on x86. I
+ * have no access to other pm2fb implementations. Sparc (and thus
+ * hopefully other big-endian) devices now work, thanks to a lot of
+ * testing work by Ron Murray. I have no access to CVision hardware,
+ * and therefore for now I am omitting the CVision code.
+ *
+ * Multiple boards support has been on the TODO list for ages.
+ * Don't expect this to change.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ *
+ *
+ */
+
+#include <linux/aperture.h>
+#include <linux/module.h>
+#include <linux/moduleparam.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/init.h>
+#include <linux/pci.h>
+#include <video/permedia2.h>
+#include <video/cvisionppc.h>
+
+#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
+#error	"The endianness of the target host has not been defined."
+#endif
+
+#if !defined(CONFIG_PCI)
+#error "Only generic PCI cards supported."
+#endif
+
+#undef PM2FB_MASTER_DEBUG
+#ifdef PM2FB_MASTER_DEBUG
+#define DPRINTK(a, b...)	\
+	printk(KERN_DEBUG "pm2fb: %s: " a, __func__ , ## b)
+#else
+#define DPRINTK(a, b...)	no_printk(a, ##b)
+#endif
+
+#define PM2_PIXMAP_SIZE	(1600 * 4)
+
+/*
+ * Driver data
+ */
+static int hwcursor = 1;
+static char *mode_option;
+
+/*
+ * The XFree GLINT driver will (I think to implement hardware cursor
+ * support on TVP4010 and similar where there is no RAMDAC - see
+ * comment in set_video) always request +ve sync regardless of what
+ * the mode requires. This screws me because I have a Sun
+ * fixed-frequency monitor which absolutely has to have -ve sync. So
+ * these flags allow the user to specify that requests for +ve sync
+ * should be silently turned in -ve sync.
+ */
+static bool lowhsync;
+static bool lowvsync;
+static bool noaccel;
+static bool nomtrr;
+
+/*
+ * The hardware state of the graphics card that isn't part of the
+ * screeninfo.
+ */
+struct pm2fb_par
+{
+	pm2type_t	type;		/* Board type */
+	unsigned char	__iomem *v_regs;/* virtual address of p_regs */
+	u32		memclock;	/* memclock */
+	u32		video;		/* video flags before blanking */
+	u32		mem_config;	/* MemConfig reg at probe */
+	u32		mem_control;	/* MemControl reg at probe */
+	u32		boot_address;	/* BootAddress reg at probe */
+	u32		palette[16];
+	int		wc_cookie;
+};
+
+/*
+ * Here we define the default structs fb_fix_screeninfo and fb_var_screeninfo
+ * if we don't use modedb.
+ */
+static struct fb_fix_screeninfo pm2fb_fix = {
+	.id =		"",
+	.type =		FB_TYPE_PACKED_PIXELS,
+	.visual =	FB_VISUAL_PSEUDOCOLOR,
+	.xpanstep =	1,
+	.ypanstep =	1,
+	.ywrapstep =	0,
+	.accel =	FB_ACCEL_3DLABS_PERMEDIA2,
+};
+
+/*
+ * Default video mode. In case the modedb doesn't work.
+ */
+static const struct fb_var_screeninfo pm2fb_var = {
+	/* "640x480, 8 bpp @ 60 Hz */
+	.xres =			640,
+	.yres =			480,
+	.xres_virtual =		640,
+	.yres_virtual =		480,
+	.bits_per_pixel =	8,
+	.red =			{0, 8, 0},
+	.blue =			{0, 8, 0},
+	.green =		{0, 8, 0},
+	.activate =		FB_ACTIVATE_NOW,
+	.height =		-1,
+	.width =		-1,
+	.accel_flags =		0,
+	.pixclock =		39721,
+	.left_margin =		40,
+	.right_margin =		24,
+	.upper_margin =		32,
+	.lower_margin =		11,
+	.hsync_len =		96,
+	.vsync_len =		2,
+	.vmode =		FB_VMODE_NONINTERLACED
+};
+
+/*
+ * Utility functions
+ */
+
+static inline u32 pm2_RD(struct pm2fb_par *p, s32 off)
+{
+	return fb_readl(p->v_regs + off);
+}
+
+static inline void pm2_WR(struct pm2fb_par *p, s32 off, u32 v)
+{
+	fb_writel(v, p->v_regs + off);
+}
+
+static inline u32 pm2_RDAC_RD(struct pm2fb_par *p, s32 idx)
+{
+	pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, idx);
+	mb();
+	return pm2_RD(p, PM2R_RD_INDEXED_DATA);
+}
+
+static inline u32 pm2v_RDAC_RD(struct pm2fb_par *p, s32 idx)
+{
+	pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
+	mb();
+	return pm2_RD(p,  PM2VR_RD_INDEXED_DATA);
+}
+
+static inline void pm2_RDAC_WR(struct pm2fb_par *p, s32 idx, u32 v)
+{
+	pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, idx);
+	wmb();
+	pm2_WR(p, PM2R_RD_INDEXED_DATA, v);
+	wmb();
+}
+
+static inline void pm2v_RDAC_WR(struct pm2fb_par *p, s32 idx, u32 v)
+{
+	pm2_WR(p, PM2VR_RD_INDEX_LOW, idx & 0xff);
+	wmb();
+	pm2_WR(p, PM2VR_RD_INDEXED_DATA, v);
+	wmb();
+}
+
+#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
+#define WAIT_FIFO(p, a)
+#else
+static inline void WAIT_FIFO(struct pm2fb_par *p, u32 a)
+{
+	while (pm2_RD(p, PM2R_IN_FIFO_SPACE) < a)
+		cpu_relax();
+}
+#endif
+
+/*
+ * partial products for the supported horizontal resolutions.
+ */
+#define PACKPP(p0, p1, p2)	(((p2) << 6) | ((p1) << 3) | (p0))
+static const struct {
+	u16 width;
+	u16 pp;
+} pp_table[] = {
+	{ 32,	PACKPP(1, 0, 0) }, { 64,	PACKPP(1, 1, 0) },
+	{ 96,	PACKPP(1, 1, 1) }, { 128,	PACKPP(2, 1, 1) },
+	{ 160,	PACKPP(2, 2, 1) }, { 192,	PACKPP(2, 2, 2) },
+	{ 224,	PACKPP(3, 2, 1) }, { 256,	PACKPP(3, 2, 2) },
+	{ 288,	PACKPP(3, 3, 1) }, { 320,	PACKPP(3, 3, 2) },
+	{ 384,	PACKPP(3, 3, 3) }, { 416,	PACKPP(4, 3, 1) },
+	{ 448,	PACKPP(4, 3, 2) }, { 512,	PACKPP(4, 3, 3) },
+	{ 544,	PACKPP(4, 4, 1) }, { 576,	PACKPP(4, 4, 2) },
+	{ 640,	PACKPP(4, 4, 3) }, { 768,	PACKPP(4, 4, 4) },
+	{ 800,	PACKPP(5, 4, 1) }, { 832,	PACKPP(5, 4, 2) },
+	{ 896,	PACKPP(5, 4, 3) }, { 1024,	PACKPP(5, 4, 4) },
+	{ 1056,	PACKPP(5, 5, 1) }, { 1088,	PACKPP(5, 5, 2) },
+	{ 1152,	PACKPP(5, 5, 3) }, { 1280,	PACKPP(5, 5, 4) },
+	{ 1536,	PACKPP(5, 5, 5) }, { 1568,	PACKPP(6, 5, 1) },
+	{ 1600,	PACKPP(6, 5, 2) }, { 1664,	PACKPP(6, 5, 3) },
+	{ 1792,	PACKPP(6, 5, 4) }, { 2048,	PACKPP(6, 5, 5) },
+	{ 0,	0 } };
+
+static u32 partprod(u32 xres)
+{
+	int i;
+
+	for (i = 0; pp_table[i].width && pp_table[i].width != xres; i++)
+		;
+	if (pp_table[i].width == 0)
+		DPRINTK("invalid width %u\n", xres);
+	return pp_table[i].pp;
+}
+
+static u32 to3264(u32 timing, int bpp, int is64)
+{
+	switch (bpp) {
+	case 24:
+		timing *= 3;
+		fallthrough;
+	case 8:
+		timing >>= 1;
+		fallthrough;
+	case 16:
+		timing >>= 1;
+		fallthrough;
+	case 32:
+		break;
+	}
+	if (is64)
+		timing >>= 1;
+	return timing;
+}
+
+static void pm2_mnp(u32 clk, unsigned char *mm, unsigned char *nn,
+		    unsigned char *pp)
+{
+	unsigned char m;
+	unsigned char n;
+	unsigned char p;
+	u32 f;
+	s32 curr;
+	s32 delta = 100000;
+
+	*mm = *nn = *pp = 0;
+	for (n = 2; n < 15; n++) {
+		for (m = 2; m; m++) {
+			f = PM2_REFERENCE_CLOCK * m / n;
+			if (f >= 150000 && f <= 300000) {
+				for (p = 0; p < 5; p++, f >>= 1) {
+					curr = (clk > f) ? clk - f : f - clk;
+					if (curr < delta) {
+						delta = curr;
+						*mm = m;
+						*nn = n;
+						*pp = p;
+					}
+				}
+			}
+		}
+	}
+}
+
+static void pm2v_mnp(u32 clk, unsigned char *mm, unsigned char *nn,
+		     unsigned char *pp)
+{
+	unsigned char m;
+	unsigned char n;
+	unsigned char p;
+	u32 f;
+	s32 delta = 1000;
+
+	*mm = *nn = *pp = 0;
+	for (m = 1; m < 128; m++) {
+		for (n = 2 * m + 1; n; n++) {
+			for (p = 0; p < 2; p++) {
+				f = (PM2_REFERENCE_CLOCK >> (p + 1)) * n / m;
+				if (clk > f - delta && clk < f + delta) {
+					delta = (clk > f) ? clk - f : f - clk;
+					*mm = m;
+					*nn = n;
+					*pp = p;
+				}
+			}
+		}
+	}
+}
+
+static void clear_palette(struct pm2fb_par *p)
+{
+	int i = 256;
+
+	WAIT_FIFO(p, 1);
+	pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, 0);
+	wmb();
+	while (i--) {
+		WAIT_FIFO(p, 3);
+		pm2_WR(p, PM2R_RD_PALETTE_DATA, 0);
+		pm2_WR(p, PM2R_RD_PALETTE_DATA, 0);
+		pm2_WR(p, PM2R_RD_PALETTE_DATA, 0);
+	}
+}
+
+static void reset_card(struct pm2fb_par *p)
+{
+	if (p->type == PM2_TYPE_PERMEDIA2V)
+		pm2_WR(p, PM2VR_RD_INDEX_HIGH, 0);
+	pm2_WR(p, PM2R_RESET_STATUS, 0);
+	mb();
+	while (pm2_RD(p, PM2R_RESET_STATUS) & PM2F_BEING_RESET)
+		cpu_relax();
+	mb();
+#ifdef CONFIG_FB_PM2_FIFO_DISCONNECT
+	DPRINTK("FIFO disconnect enabled\n");
+	pm2_WR(p, PM2R_FIFO_DISCON, 1);
+	mb();
+#endif
+
+	/* Restore stashed memory config information from probe */
+	WAIT_FIFO(p, 3);
+	pm2_WR(p, PM2R_MEM_CONTROL, p->mem_control);
+	pm2_WR(p, PM2R_BOOT_ADDRESS, p->boot_address);
+	wmb();
+	pm2_WR(p, PM2R_MEM_CONFIG, p->mem_config);
+}
+
+static void reset_config(struct pm2fb_par *p)
+{
+	WAIT_FIFO(p, 53);
+	pm2_WR(p, PM2R_CHIP_CONFIG, pm2_RD(p, PM2R_CHIP_CONFIG) &
+			~(PM2F_VGA_ENABLE | PM2F_VGA_FIXED));
+	pm2_WR(p, PM2R_BYPASS_WRITE_MASK, ~(0L));
+	pm2_WR(p, PM2R_FRAMEBUFFER_WRITE_MASK, ~(0L));
+	pm2_WR(p, PM2R_FIFO_CONTROL, 0);
+	pm2_WR(p, PM2R_APERTURE_ONE, 0);
+	pm2_WR(p, PM2R_APERTURE_TWO, 0);
+	pm2_WR(p, PM2R_RASTERIZER_MODE, 0);
+	pm2_WR(p, PM2R_DELTA_MODE, PM2F_DELTA_ORDER_RGB);
+	pm2_WR(p, PM2R_LB_READ_FORMAT, 0);
+	pm2_WR(p, PM2R_LB_WRITE_FORMAT, 0);
+	pm2_WR(p, PM2R_LB_READ_MODE, 0);
+	pm2_WR(p, PM2R_LB_SOURCE_OFFSET, 0);
+	pm2_WR(p, PM2R_FB_SOURCE_OFFSET, 0);
+	pm2_WR(p, PM2R_FB_PIXEL_OFFSET, 0);
+	pm2_WR(p, PM2R_FB_WINDOW_BASE, 0);
+	pm2_WR(p, PM2R_LB_WINDOW_BASE, 0);
+	pm2_WR(p, PM2R_FB_SOFT_WRITE_MASK, ~(0L));
+	pm2_WR(p, PM2R_FB_HARD_WRITE_MASK, ~(0L));
+	pm2_WR(p, PM2R_FB_READ_PIXEL, 0);
+	pm2_WR(p, PM2R_DITHER_MODE, 0);
+	pm2_WR(p, PM2R_AREA_STIPPLE_MODE, 0);
+	pm2_WR(p, PM2R_DEPTH_MODE, 0);
+	pm2_WR(p, PM2R_STENCIL_MODE, 0);
+	pm2_WR(p, PM2R_TEXTURE_ADDRESS_MODE, 0);
+	pm2_WR(p, PM2R_TEXTURE_READ_MODE, 0);
+	pm2_WR(p, PM2R_TEXEL_LUT_MODE, 0);
+	pm2_WR(p, PM2R_YUV_MODE, 0);
+	pm2_WR(p, PM2R_COLOR_DDA_MODE, 0);
+	pm2_WR(p, PM2R_TEXTURE_COLOR_MODE, 0);
+	pm2_WR(p, PM2R_FOG_MODE, 0);
+	pm2_WR(p, PM2R_ALPHA_BLEND_MODE, 0);
+	pm2_WR(p, PM2R_LOGICAL_OP_MODE, 0);
+	pm2_WR(p, PM2R_STATISTICS_MODE, 0);
+	pm2_WR(p, PM2R_SCISSOR_MODE, 0);
+	pm2_WR(p, PM2R_FILTER_MODE, PM2F_SYNCHRONIZATION);
+	pm2_WR(p, PM2R_RD_PIXEL_MASK, 0xff);
+	switch (p->type) {
+	case PM2_TYPE_PERMEDIA2:
+		pm2_RDAC_WR(p, PM2I_RD_MODE_CONTROL, 0); /* no overlay */
+		pm2_RDAC_WR(p, PM2I_RD_CURSOR_CONTROL, 0);
+		pm2_RDAC_WR(p, PM2I_RD_MISC_CONTROL, PM2F_RD_PALETTE_WIDTH_8);
+		pm2_RDAC_WR(p, PM2I_RD_COLOR_KEY_CONTROL, 0);
+		pm2_RDAC_WR(p, PM2I_RD_OVERLAY_KEY, 0);
+		pm2_RDAC_WR(p, PM2I_RD_RED_KEY, 0);
+		pm2_RDAC_WR(p, PM2I_RD_GREEN_KEY, 0);
+		pm2_RDAC_WR(p, PM2I_RD_BLUE_KEY, 0);
+		break;
+	case PM2_TYPE_PERMEDIA2V:
+		pm2v_RDAC_WR(p, PM2VI_RD_MISC_CONTROL, 1); /* 8bit */
+		break;
+	}
+}
+
+static void set_aperture(struct pm2fb_par *p, u32 depth)
+{
+	/*
+	 * The hardware is little-endian. When used in big-endian
+	 * hosts, the on-chip aperture settings are used where
+	 * possible to translate from host to card byte order.
+	 */
+	WAIT_FIFO(p, 2);
+#ifdef __LITTLE_ENDIAN
+	pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_STANDARD);
+#else
+	switch (depth) {
+	case 24:	/* RGB->BGR */
+		/*
+		 * We can't use the aperture to translate host to
+		 * card byte order here, so we switch to BGR mode
+		 * in pm2fb_set_par().
+		 */
+	case 8:		/* B->B */
+		pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_STANDARD);
+		break;
+	case 16:	/* HL->LH */
+		pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_HALFWORDSWAP);
+		break;
+	case 32:	/* RGBA->ABGR */
+		pm2_WR(p, PM2R_APERTURE_ONE, PM2F_APERTURE_BYTESWAP);
+		break;
+	}
+#endif
+
+	/* We don't use aperture two, so this may be superflous */
+	pm2_WR(p, PM2R_APERTURE_TWO, PM2F_APERTURE_STANDARD);
+}
+
+static void set_color(struct pm2fb_par *p, unsigned char regno,
+		      unsigned char r, unsigned char g, unsigned char b)
+{
+	WAIT_FIFO(p, 4);
+	pm2_WR(p, PM2R_RD_PALETTE_WRITE_ADDRESS, regno);
+	wmb();
+	pm2_WR(p, PM2R_RD_PALETTE_DATA, r);
+	wmb();
+	pm2_WR(p, PM2R_RD_PALETTE_DATA, g);
+	wmb();
+	pm2_WR(p, PM2R_RD_PALETTE_DATA, b);
+}
+
+static void set_memclock(struct pm2fb_par *par, u32 clk)
+{
+	int i;
+	unsigned char m, n, p;
+
+	switch (par->type) {
+	case PM2_TYPE_PERMEDIA2V:
+		pm2v_mnp(clk/2, &m, &n, &p);
+		WAIT_FIFO(par, 12);
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_MCLK_CONTROL >> 8);
+		pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 0);
+		pm2v_RDAC_WR(par, PM2VI_RD_MCLK_PRESCALE, m);
+		pm2v_RDAC_WR(par, PM2VI_RD_MCLK_FEEDBACK, n);
+		pm2v_RDAC_WR(par, PM2VI_RD_MCLK_POSTSCALE, p);
+		pm2v_RDAC_WR(par, PM2VI_RD_MCLK_CONTROL, 1);
+		rmb();
+		for (i = 256; i; i--)
+			if (pm2v_RDAC_RD(par, PM2VI_RD_MCLK_CONTROL) & 2)
+				break;
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+		break;
+	case PM2_TYPE_PERMEDIA2:
+		pm2_mnp(clk, &m, &n, &p);
+		WAIT_FIFO(par, 10);
+		pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 6);
+		pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_1, m);
+		pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_2, n);
+		pm2_RDAC_WR(par, PM2I_RD_MEMORY_CLOCK_3, 8|p);
+		pm2_RDAC_RD(par, PM2I_RD_MEMORY_CLOCK_STATUS);
+		rmb();
+		for (i = 256; i; i--)
+			if (pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED)
+				break;
+		break;
+	}
+}
+
+static void set_pixclock(struct pm2fb_par *par, u32 clk)
+{
+	int i;
+	unsigned char m, n, p;
+
+	switch (par->type) {
+	case PM2_TYPE_PERMEDIA2:
+		pm2_mnp(clk, &m, &n, &p);
+		WAIT_FIFO(par, 10);
+		pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 0);
+		pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A1, m);
+		pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A2, n);
+		pm2_RDAC_WR(par, PM2I_RD_PIXEL_CLOCK_A3, 8|p);
+		pm2_RDAC_RD(par, PM2I_RD_PIXEL_CLOCK_STATUS);
+		rmb();
+		for (i = 256; i; i--)
+			if (pm2_RD(par, PM2R_RD_INDEXED_DATA) & PM2F_PLL_LOCKED)
+				break;
+		break;
+	case PM2_TYPE_PERMEDIA2V:
+		pm2v_mnp(clk/2, &m, &n, &p);
+		WAIT_FIFO(par, 8);
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_CLK0_PRESCALE >> 8);
+		pm2v_RDAC_WR(par, PM2VI_RD_CLK0_PRESCALE, m);
+		pm2v_RDAC_WR(par, PM2VI_RD_CLK0_FEEDBACK, n);
+		pm2v_RDAC_WR(par, PM2VI_RD_CLK0_POSTSCALE, p);
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+		break;
+	}
+}
+
+static void set_video(struct pm2fb_par *p, u32 video)
+{
+	u32 tmp;
+	u32 vsync = video;
+
+	DPRINTK("video = 0x%x\n", video);
+
+	/*
+	 * The hardware cursor needs +vsync to recognise vert retrace.
+	 * We may not be using the hardware cursor, but the X Glint
+	 * driver may well. So always set +hsync/+vsync and then set
+	 * the RAMDAC to invert the sync if necessary.
+	 */
+	vsync &= ~(PM2F_HSYNC_MASK | PM2F_VSYNC_MASK);
+	vsync |= PM2F_HSYNC_ACT_HIGH | PM2F_VSYNC_ACT_HIGH;
+
+	WAIT_FIFO(p, 3);
+	pm2_WR(p, PM2R_VIDEO_CONTROL, vsync);
+
+	switch (p->type) {
+	case PM2_TYPE_PERMEDIA2:
+		tmp = PM2F_RD_PALETTE_WIDTH_8;
+		if ((video & PM2F_HSYNC_MASK) == PM2F_HSYNC_ACT_LOW)
+			tmp |= 4; /* invert hsync */
+		if ((video & PM2F_VSYNC_MASK) == PM2F_VSYNC_ACT_LOW)
+			tmp |= 8; /* invert vsync */
+		pm2_RDAC_WR(p, PM2I_RD_MISC_CONTROL, tmp);
+		break;
+	case PM2_TYPE_PERMEDIA2V:
+		tmp = 0;
+		if ((video & PM2F_HSYNC_MASK) == PM2F_HSYNC_ACT_LOW)
+			tmp |= 1; /* invert hsync */
+		if ((video & PM2F_VSYNC_MASK) == PM2F_VSYNC_ACT_LOW)
+			tmp |= 4; /* invert vsync */
+		pm2v_RDAC_WR(p, PM2VI_RD_SYNC_CONTROL, tmp);
+		break;
+	}
+}
+
+/*
+ *	pm2fb_check_var - Optional function. Validates a var passed in.
+ *	@var: frame buffer variable screen structure
+ *	@info: frame buffer structure that represents a single frame buffer
+ *
+ *	Checks to see if the hardware supports the state requested by
+ *	var passed in.
+ *
+ *	Returns negative errno on error, or zero on success.
+ */
+static int pm2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+	u32 lpitch;
+
+	if (var->bits_per_pixel != 8  && var->bits_per_pixel != 16 &&
+	    var->bits_per_pixel != 24 && var->bits_per_pixel != 32) {
+		DPRINTK("depth not supported: %u\n", var->bits_per_pixel);
+		return -EINVAL;
+	}
+
+	if (var->xres != var->xres_virtual) {
+		DPRINTK("virtual x resolution != "
+			"physical x resolution not supported\n");
+		return -EINVAL;
+	}
+
+	if (var->yres > var->yres_virtual) {
+		DPRINTK("virtual y resolution < "
+			"physical y resolution not possible\n");
+		return -EINVAL;
+	}
+
+	/* permedia cannot blit over 2048 */
+	if (var->yres_virtual > 2047) {
+		var->yres_virtual = 2047;
+	}
+
+	if (var->xoffset) {
+		DPRINTK("xoffset not supported\n");
+		return -EINVAL;
+	}
+
+	if ((var->vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
+		DPRINTK("interlace not supported\n");
+		return -EINVAL;
+	}
+
+	var->xres = (var->xres + 15) & ~15; /* could sometimes be 8 */
+	lpitch = var->xres * ((var->bits_per_pixel + 7) >> 3);
+
+	if (var->xres < 320 || var->xres > 1600) {
+		DPRINTK("width not supported: %u\n", var->xres);
+		return -EINVAL;
+	}
+
+	if (var->yres < 200 || var->yres > 1200) {
+		DPRINTK("height not supported: %u\n", var->yres);
+		return -EINVAL;
+	}
+
+	if (lpitch * var->yres_virtual > info->fix.smem_len) {
+		DPRINTK("no memory for screen (%ux%ux%u)\n",
+			var->xres, var->yres_virtual, var->bits_per_pixel);
+		return -EINVAL;
+	}
+
+	if (!var->pixclock) {
+		DPRINTK("pixclock is zero\n");
+		return -EINVAL;
+	}
+
+	if (PICOS2KHZ(var->pixclock) > PM2_MAX_PIXCLOCK) {
+		DPRINTK("pixclock too high (%ldKHz)\n",
+			PICOS2KHZ(var->pixclock));
+		return -EINVAL;
+	}
+
+	var->transp.offset = 0;
+	var->transp.length = 0;
+	switch (var->bits_per_pixel) {
+	case 8:
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		break;
+	case 16:
+		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 32:
+		var->transp.offset = 24;
+		var->transp.length = 8;
+		var->red.offset	  = 16;
+		var->green.offset = 8;
+		var->blue.offset  = 0;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		break;
+	case 24:
+#ifdef __BIG_ENDIAN
+		var->red.offset   = 0;
+		var->blue.offset  = 16;
+#else
+		var->red.offset   = 16;
+		var->blue.offset  = 0;
+#endif
+		var->green.offset = 8;
+		var->red.length = 8;
+		var->green.length = 8;
+		var->blue.length = 8;
+		break;
+	}
+	var->height = -1;
+	var->width = -1;
+
+	var->accel_flags = 0;	/* Can't mmap if this is on */
+
+	DPRINTK("Checking graphics mode at %dx%d depth %d\n",
+		var->xres, var->yres, var->bits_per_pixel);
+	return 0;
+}
+
+/**
+ *	pm2fb_set_par - Alters the hardware state.
+ *	@info: frame buffer structure that represents a single frame buffer
+ *
+ *	Using the fb_var_screeninfo in fb_info we set the resolution of the
+ *	this particular framebuffer.
+ */
+static int pm2fb_set_par(struct fb_info *info)
+{
+	struct pm2fb_par *par = info->par;
+	u32 pixclock;
+	u32 width = (info->var.xres_virtual + 7) & ~7;
+	u32 height = info->var.yres_virtual;
+	u32 depth = (info->var.bits_per_pixel + 7) & ~7;
+	u32 hsstart, hsend, hbend, htotal;
+	u32 vsstart, vsend, vbend, vtotal;
+	u32 stride;
+	u32 base;
+	u32 video = 0;
+	u32 clrmode = PM2F_RD_COLOR_MODE_RGB | PM2F_RD_GUI_ACTIVE;
+	u32 txtmap = 0;
+	u32 pixsize = 0;
+	u32 clrformat = 0;
+	u32 misc = 1; /* 8-bit DAC */
+	u32 xres = (info->var.xres + 31) & ~31;
+	int data64;
+
+	reset_card(par);
+	reset_config(par);
+	clear_palette(par);
+	if (par->memclock)
+		set_memclock(par, par->memclock);
+
+	depth = (depth > 32) ? 32 : depth;
+	data64 = depth > 8 || par->type == PM2_TYPE_PERMEDIA2V;
+
+	pixclock = PICOS2KHZ(info->var.pixclock);
+	if (pixclock > PM2_MAX_PIXCLOCK) {
+		DPRINTK("pixclock too high (%uKHz)\n", pixclock);
+		return -EINVAL;
+	}
+
+	hsstart = to3264(info->var.right_margin, depth, data64);
+	hsend = hsstart + to3264(info->var.hsync_len, depth, data64);
+	hbend = hsend + to3264(info->var.left_margin, depth, data64);
+	htotal = to3264(xres, depth, data64) + hbend - 1;
+	vsstart = (info->var.lower_margin)
+		? info->var.lower_margin - 1
+		: 0;	/* FIXME! */
+	vsend = info->var.lower_margin + info->var.vsync_len - 1;
+	vbend = info->var.lower_margin + info->var.vsync_len +
+		info->var.upper_margin;
+	vtotal = info->var.yres + vbend - 1;
+	stride = to3264(width, depth, 1);
+	base = to3264(info->var.yoffset * xres + info->var.xoffset, depth, 1);
+	if (data64)
+		video |= PM2F_DATA_64_ENABLE;
+
+	if (info->var.sync & FB_SYNC_HOR_HIGH_ACT) {
+		if (lowhsync) {
+			DPRINTK("ignoring +hsync, using -hsync.\n");
+			video |= PM2F_HSYNC_ACT_LOW;
+		} else
+			video |= PM2F_HSYNC_ACT_HIGH;
+	} else
+		video |= PM2F_HSYNC_ACT_LOW;
+
+	if (info->var.sync & FB_SYNC_VERT_HIGH_ACT) {
+		if (lowvsync) {
+			DPRINTK("ignoring +vsync, using -vsync.\n");
+			video |= PM2F_VSYNC_ACT_LOW;
+		} else
+			video |= PM2F_VSYNC_ACT_HIGH;
+	} else
+		video |= PM2F_VSYNC_ACT_LOW;
+
+	if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_INTERLACED) {
+		DPRINTK("interlaced not supported\n");
+		return -EINVAL;
+	}
+	if ((info->var.vmode & FB_VMODE_MASK) == FB_VMODE_DOUBLE)
+		video |= PM2F_LINE_DOUBLE;
+	if ((info->var.activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW)
+		video |= PM2F_VIDEO_ENABLE;
+	par->video = video;
+
+	info->fix.visual =
+		(depth == 8) ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
+	info->fix.line_length = info->var.xres * depth / 8;
+	info->cmap.len = 256;
+
+	/*
+	 * Settings calculated. Now write them out.
+	 */
+	if (par->type == PM2_TYPE_PERMEDIA2V) {
+		WAIT_FIFO(par, 1);
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+	}
+
+	set_aperture(par, depth);
+
+	mb();
+	WAIT_FIFO(par, 19);
+	switch (depth) {
+	case 8:
+		pm2_WR(par, PM2R_FB_READ_PIXEL, 0);
+		clrformat = 0x2e;
+		break;
+	case 16:
+		pm2_WR(par, PM2R_FB_READ_PIXEL, 1);
+		clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGB565;
+		txtmap = PM2F_TEXTEL_SIZE_16;
+		pixsize = 1;
+		clrformat = 0x70;
+		misc |= 8;
+		break;
+	case 32:
+		pm2_WR(par, PM2R_FB_READ_PIXEL, 2);
+		clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGBA8888;
+		txtmap = PM2F_TEXTEL_SIZE_32;
+		pixsize = 2;
+		clrformat = 0x20;
+		misc |= 8;
+		break;
+	case 24:
+		pm2_WR(par, PM2R_FB_READ_PIXEL, 4);
+		clrmode |= PM2F_RD_TRUECOLOR | PM2F_RD_PIXELFORMAT_RGB888;
+		txtmap = PM2F_TEXTEL_SIZE_24;
+		pixsize = 4;
+		clrformat = 0x20;
+		misc |= 8;
+		break;
+	}
+	pm2_WR(par, PM2R_FB_WRITE_MODE, PM2F_FB_WRITE_ENABLE);
+	pm2_WR(par, PM2R_FB_READ_MODE, partprod(xres));
+	pm2_WR(par, PM2R_LB_READ_MODE, partprod(xres));
+	pm2_WR(par, PM2R_TEXTURE_MAP_FORMAT, txtmap | partprod(xres));
+	pm2_WR(par, PM2R_H_TOTAL, htotal);
+	pm2_WR(par, PM2R_HS_START, hsstart);
+	pm2_WR(par, PM2R_HS_END, hsend);
+	pm2_WR(par, PM2R_HG_END, hbend);
+	pm2_WR(par, PM2R_HB_END, hbend);
+	pm2_WR(par, PM2R_V_TOTAL, vtotal);
+	pm2_WR(par, PM2R_VS_START, vsstart);
+	pm2_WR(par, PM2R_VS_END, vsend);
+	pm2_WR(par, PM2R_VB_END, vbend);
+	pm2_WR(par, PM2R_SCREEN_STRIDE, stride);
+	wmb();
+	pm2_WR(par, PM2R_WINDOW_ORIGIN, 0);
+	pm2_WR(par, PM2R_SCREEN_SIZE, (height << 16) | width);
+	pm2_WR(par, PM2R_SCISSOR_MODE, PM2F_SCREEN_SCISSOR_ENABLE);
+	wmb();
+	pm2_WR(par, PM2R_SCREEN_BASE, base);
+	wmb();
+	set_video(par, video);
+	WAIT_FIFO(par, 10);
+	switch (par->type) {
+	case PM2_TYPE_PERMEDIA2:
+		pm2_RDAC_WR(par, PM2I_RD_COLOR_MODE, clrmode);
+		pm2_RDAC_WR(par, PM2I_RD_COLOR_KEY_CONTROL,
+				(depth == 8) ? 0 : PM2F_COLOR_KEY_TEST_OFF);
+		break;
+	case PM2_TYPE_PERMEDIA2V:
+		pm2v_RDAC_WR(par, PM2VI_RD_DAC_CONTROL, 0);
+		pm2v_RDAC_WR(par, PM2VI_RD_PIXEL_SIZE, pixsize);
+		pm2v_RDAC_WR(par, PM2VI_RD_COLOR_FORMAT, clrformat);
+		pm2v_RDAC_WR(par, PM2VI_RD_MISC_CONTROL, misc);
+		pm2v_RDAC_WR(par, PM2VI_RD_OVERLAY_KEY, 0);
+		break;
+	}
+	set_pixclock(par, pixclock);
+	DPRINTK("Setting graphics mode at %dx%d depth %d\n",
+		info->var.xres, info->var.yres, info->var.bits_per_pixel);
+	return 0;
+}
+
+/**
+ *	pm2fb_setcolreg - Sets a color register.
+ *	@regno: boolean, 0 copy local, 1 get_user() function
+ *	@red: frame buffer colormap structure
+ *	@green: The green value which can be up to 16 bits wide
+ *	@blue:  The blue value which can be up to 16 bits wide.
+ *	@transp: If supported the alpha value which can be up to 16 bits wide.
+ *	@info: frame buffer info structure
+ *
+ *	Set a single color register. The values supplied have a 16 bit
+ *	magnitude which needs to be scaled in this function for the hardware.
+ *	Pretty much a direct lift from tdfxfb.c.
+ *
+ *	Returns negative errno on error, or zero on success.
+ */
+static int pm2fb_setcolreg(unsigned regno, unsigned red, unsigned green,
+			   unsigned blue, unsigned transp,
+			   struct fb_info *info)
+{
+	struct pm2fb_par *par = info->par;
+
+	if (regno >= info->cmap.len)  /* no. of hw registers */
+		return -EINVAL;
+	/*
+	 * Program hardware... do anything you want with transp
+	 */
+
+	/* grayscale works only partially under directcolor */
+	/* grayscale = 0.30*R + 0.59*G + 0.11*B */
+	if (info->var.grayscale)
+		red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
+
+	/* Directcolor:
+	 *   var->{color}.offset contains start of bitfield
+	 *   var->{color}.length contains length of bitfield
+	 *   {hardwarespecific} contains width of DAC
+	 *   cmap[X] is programmed to
+	 *   (X << red.offset) | (X << green.offset) | (X << blue.offset)
+	 *   RAMDAC[X] is programmed to (red, green, blue)
+	 *
+	 * Pseudocolor:
+	 *    uses offset = 0 && length = DAC register width.
+	 *    var->{color}.offset is 0
+	 *    var->{color}.length contains width of DAC
+	 *    cmap is not used
+	 *    DAC[X] is programmed to (red, green, blue)
+	 * Truecolor:
+	 *    does not use RAMDAC (usually has 3 of them).
+	 *    var->{color}.offset contains start of bitfield
+	 *    var->{color}.length contains length of bitfield
+	 *    cmap is programmed to
+	 *    (red << red.offset) | (green << green.offset) |
+	 *    (blue << blue.offset) | (transp << transp.offset)
+	 *    RAMDAC does not exist
+	 */
+#define CNVT_TOHW(val, width) ((((val) << (width)) + 0x7FFF -(val)) >> 16)
+	switch (info->fix.visual) {
+	case FB_VISUAL_TRUECOLOR:
+	case FB_VISUAL_PSEUDOCOLOR:
+		red = CNVT_TOHW(red, info->var.red.length);
+		green = CNVT_TOHW(green, info->var.green.length);
+		blue = CNVT_TOHW(blue, info->var.blue.length);
+		transp = CNVT_TOHW(transp, info->var.transp.length);
+		break;
+	case FB_VISUAL_DIRECTCOLOR:
+		/* example here assumes 8 bit DAC. Might be different
+		 * for your hardware */
+		red = CNVT_TOHW(red, 8);
+		green = CNVT_TOHW(green, 8);
+		blue = CNVT_TOHW(blue, 8);
+		/* hey, there is bug in transp handling... */
+		transp = CNVT_TOHW(transp, 8);
+		break;
+	}
+#undef CNVT_TOHW
+	/* Truecolor has hardware independent palette */
+	if (info->fix.visual == FB_VISUAL_TRUECOLOR) {
+		u32 v;
+
+		if (regno >= 16)
+			return -EINVAL;
+
+		v = (red << info->var.red.offset) |
+			(green << info->var.green.offset) |
+			(blue << info->var.blue.offset) |
+			(transp << info->var.transp.offset);
+
+		switch (info->var.bits_per_pixel) {
+		case 8:
+			break;
+		case 16:
+		case 24:
+		case 32:
+			par->palette[regno] = v;
+			break;
+		}
+		return 0;
+	} else if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR)
+		set_color(par, regno, red, green, blue);
+
+	return 0;
+}
+
+/**
+ *	pm2fb_pan_display - Pans the display.
+ *	@var: frame buffer variable screen structure
+ *	@info: frame buffer structure that represents a single frame buffer
+ *
+ *	Pan (or wrap, depending on the `vmode' field) the display using the
+ *	`xoffset' and `yoffset' fields of the `var' structure.
+ *	If the values don't fit, return -EINVAL.
+ *
+ *	Returns negative errno on error, or zero on success.
+ *
+ */
+static int pm2fb_pan_display(struct fb_var_screeninfo *var,
+			     struct fb_info *info)
+{
+	struct pm2fb_par *p = info->par;
+	u32 base;
+	u32 depth = (info->var.bits_per_pixel + 7) & ~7;
+	u32 xres = (info->var.xres + 31) & ~31;
+
+	depth = (depth > 32) ? 32 : depth;
+	base = to3264(var->yoffset * xres + var->xoffset, depth, 1);
+	WAIT_FIFO(p, 1);
+	pm2_WR(p, PM2R_SCREEN_BASE, base);
+	return 0;
+}
+
+/**
+ *	pm2fb_blank - Blanks the display.
+ *	@blank_mode: the blank mode we want.
+ *	@info: frame buffer structure that represents a single frame buffer
+ *
+ *	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 on hardware that supports disabling hsync/vsync:
+ *	blank_mode == 2: suspend vsync
+ *	blank_mode == 3: suspend hsync
+ *	blank_mode == 4: powerdown
+ *
+ *	Returns negative errno on error, or zero on success.
+ *
+ */
+static int pm2fb_blank(int blank_mode, struct fb_info *info)
+{
+	struct pm2fb_par *par = info->par;
+	u32 video = par->video;
+
+	DPRINTK("blank_mode %d\n", blank_mode);
+
+	switch (blank_mode) {
+	case FB_BLANK_UNBLANK:
+		/* Screen: On */
+		video |= PM2F_VIDEO_ENABLE;
+		break;
+	case FB_BLANK_NORMAL:
+		/* Screen: Off */
+		video &= ~PM2F_VIDEO_ENABLE;
+		break;
+	case FB_BLANK_VSYNC_SUSPEND:
+		/* VSync: Off */
+		video &= ~(PM2F_VSYNC_MASK | PM2F_BLANK_LOW);
+		break;
+	case FB_BLANK_HSYNC_SUSPEND:
+		/* HSync: Off */
+		video &= ~(PM2F_HSYNC_MASK | PM2F_BLANK_LOW);
+		break;
+	case FB_BLANK_POWERDOWN:
+		/* HSync: Off, VSync: Off */
+		video &= ~(PM2F_VSYNC_MASK | PM2F_HSYNC_MASK | PM2F_BLANK_LOW);
+		break;
+	}
+	set_video(par, video);
+	return 0;
+}
+
+static int pm2fb_sync(struct fb_info *info)
+{
+	struct pm2fb_par *par = info->par;
+
+	WAIT_FIFO(par, 1);
+	pm2_WR(par, PM2R_SYNC, 0);
+	mb();
+	do {
+		while (pm2_RD(par, PM2R_OUT_FIFO_WORDS) == 0)
+			cpu_relax();
+	} while (pm2_RD(par, PM2R_OUT_FIFO) != PM2TAG(PM2R_SYNC));
+
+	return 0;
+}
+
+static void pm2fb_fillrect(struct fb_info *info,
+				const struct fb_fillrect *region)
+{
+	struct pm2fb_par *par = info->par;
+	struct fb_fillrect modded;
+	int vxres, vyres;
+	u32 color = (info->fix.visual == FB_VISUAL_TRUECOLOR) ?
+		((u32 *)info->pseudo_palette)[region->color] : region->color;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+	if ((info->flags & FBINFO_HWACCEL_DISABLED) ||
+		region->rop != ROP_COPY ) {
+		cfb_fillrect(info, region);
+		return;
+	}
+
+	vxres = info->var.xres_virtual;
+	vyres = info->var.yres_virtual;
+
+	memcpy(&modded, region, sizeof(struct fb_fillrect));
+
+	if (!modded.width || !modded.height ||
+	    modded.dx >= vxres || modded.dy >= vyres)
+		return;
+
+	if (modded.dx + modded.width  > vxres)
+		modded.width  = vxres - modded.dx;
+	if (modded.dy + modded.height > vyres)
+		modded.height = vyres - modded.dy;
+
+	if (info->var.bits_per_pixel == 8)
+		color |= color << 8;
+	if (info->var.bits_per_pixel <= 16)
+		color |= color << 16;
+
+	WAIT_FIFO(par, 3);
+	pm2_WR(par, PM2R_CONFIG, PM2F_CONFIG_FB_WRITE_ENABLE);
+	pm2_WR(par, PM2R_RECTANGLE_ORIGIN, (modded.dy << 16) | modded.dx);
+	pm2_WR(par, PM2R_RECTANGLE_SIZE, (modded.height << 16) | modded.width);
+	if (info->var.bits_per_pixel != 24) {
+		WAIT_FIFO(par, 2);
+		pm2_WR(par, PM2R_FB_BLOCK_COLOR, color);
+		wmb();
+		pm2_WR(par, PM2R_RENDER,
+				PM2F_RENDER_RECTANGLE | PM2F_RENDER_FASTFILL);
+	} else {
+		WAIT_FIFO(par, 4);
+		pm2_WR(par, PM2R_COLOR_DDA_MODE, 1);
+		pm2_WR(par, PM2R_CONSTANT_COLOR, color);
+		wmb();
+		pm2_WR(par, PM2R_RENDER,
+				PM2F_RENDER_RECTANGLE |
+				PM2F_INCREASE_X | PM2F_INCREASE_Y );
+		pm2_WR(par, PM2R_COLOR_DDA_MODE, 0);
+	}
+}
+
+static void pm2fb_copyarea(struct fb_info *info,
+				const struct fb_copyarea *area)
+{
+	struct pm2fb_par *par = info->par;
+	struct fb_copyarea modded;
+	u32 vxres, vyres;
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+	if (info->flags & FBINFO_HWACCEL_DISABLED) {
+		cfb_copyarea(info, area);
+		return;
+	}
+
+	memcpy(&modded, area, sizeof(struct fb_copyarea));
+
+	vxres = info->var.xres_virtual;
+	vyres = info->var.yres_virtual;
+
+	if (!modded.width || !modded.height ||
+	    modded.sx >= vxres || modded.sy >= vyres ||
+	    modded.dx >= vxres || modded.dy >= vyres)
+		return;
+
+	if (modded.sx + modded.width > vxres)
+		modded.width = vxres - modded.sx;
+	if (modded.dx + modded.width > vxres)
+		modded.width = vxres - modded.dx;
+	if (modded.sy + modded.height > vyres)
+		modded.height = vyres - modded.sy;
+	if (modded.dy + modded.height > vyres)
+		modded.height = vyres - modded.dy;
+
+	WAIT_FIFO(par, 5);
+	pm2_WR(par, PM2R_CONFIG, PM2F_CONFIG_FB_WRITE_ENABLE |
+		PM2F_CONFIG_FB_READ_SOURCE_ENABLE);
+	pm2_WR(par, PM2R_FB_SOURCE_DELTA,
+			((modded.sy - modded.dy) & 0xfff) << 16 |
+			((modded.sx - modded.dx) & 0xfff));
+	pm2_WR(par, PM2R_RECTANGLE_ORIGIN, (modded.dy << 16) | modded.dx);
+	pm2_WR(par, PM2R_RECTANGLE_SIZE, (modded.height << 16) | modded.width);
+	wmb();
+	pm2_WR(par, PM2R_RENDER, PM2F_RENDER_RECTANGLE |
+				(modded.dx < modded.sx ? PM2F_INCREASE_X : 0) |
+				(modded.dy < modded.sy ? PM2F_INCREASE_Y : 0));
+}
+
+static void pm2fb_imageblit(struct fb_info *info, const struct fb_image *image)
+{
+	struct pm2fb_par *par = info->par;
+	u32 height = image->height;
+	u32 fgx, bgx;
+	const u32 *src = (const u32 *)image->data;
+	u32 xres = (info->var.xres + 31) & ~31;
+	int raster_mode = 1; /* invert bits */
+
+#ifdef __LITTLE_ENDIAN
+	raster_mode |= 3 << 7; /* reverse byte order */
+#endif
+
+	if (info->state != FBINFO_STATE_RUNNING)
+		return;
+	if (info->flags & FBINFO_HWACCEL_DISABLED || image->depth != 1) {
+		cfb_imageblit(info, image);
+		return;
+	}
+	switch (info->fix.visual) {
+	case FB_VISUAL_PSEUDOCOLOR:
+		fgx = image->fg_color;
+		bgx = image->bg_color;
+		break;
+	case FB_VISUAL_TRUECOLOR:
+	default:
+		fgx = par->palette[image->fg_color];
+		bgx = par->palette[image->bg_color];
+		break;
+	}
+	if (info->var.bits_per_pixel == 8) {
+		fgx |= fgx << 8;
+		bgx |= bgx << 8;
+	}
+	if (info->var.bits_per_pixel <= 16) {
+		fgx |= fgx << 16;
+		bgx |= bgx << 16;
+	}
+
+	WAIT_FIFO(par, 13);
+	pm2_WR(par, PM2R_FB_READ_MODE, partprod(xres));
+	pm2_WR(par, PM2R_SCISSOR_MIN_XY,
+			((image->dy & 0xfff) << 16) | (image->dx & 0x0fff));
+	pm2_WR(par, PM2R_SCISSOR_MAX_XY,
+			(((image->dy + image->height) & 0x0fff) << 16) |
+			((image->dx + image->width) & 0x0fff));
+	pm2_WR(par, PM2R_SCISSOR_MODE, 1);
+	/* GXcopy & UNIT_ENABLE */
+	pm2_WR(par, PM2R_LOGICAL_OP_MODE, (0x3 << 1) | 1);
+	pm2_WR(par, PM2R_RECTANGLE_ORIGIN,
+			((image->dy & 0xfff) << 16) | (image->dx & 0x0fff));
+	pm2_WR(par, PM2R_RECTANGLE_SIZE,
+			((image->height & 0x0fff) << 16) |
+			((image->width) & 0x0fff));
+	if (info->var.bits_per_pixel == 24) {
+		pm2_WR(par, PM2R_COLOR_DDA_MODE, 1);
+		/* clear area */
+		pm2_WR(par, PM2R_CONSTANT_COLOR, bgx);
+		pm2_WR(par, PM2R_RENDER,
+			PM2F_RENDER_RECTANGLE |
+			PM2F_INCREASE_X | PM2F_INCREASE_Y);
+		/* BitMapPackEachScanline */
+		pm2_WR(par, PM2R_RASTERIZER_MODE, raster_mode | (1 << 9));
+		pm2_WR(par, PM2R_CONSTANT_COLOR, fgx);
+		pm2_WR(par, PM2R_RENDER,
+			PM2F_RENDER_RECTANGLE |
+			PM2F_INCREASE_X | PM2F_INCREASE_Y |
+			PM2F_RENDER_SYNC_ON_BIT_MASK);
+	} else {
+		pm2_WR(par, PM2R_COLOR_DDA_MODE, 0);
+		/* clear area */
+		pm2_WR(par, PM2R_FB_BLOCK_COLOR, bgx);
+		pm2_WR(par, PM2R_RENDER,
+			PM2F_RENDER_RECTANGLE |
+			PM2F_RENDER_FASTFILL |
+			PM2F_INCREASE_X | PM2F_INCREASE_Y);
+		pm2_WR(par, PM2R_RASTERIZER_MODE, raster_mode);
+		pm2_WR(par, PM2R_FB_BLOCK_COLOR, fgx);
+		pm2_WR(par, PM2R_RENDER,
+			PM2F_RENDER_RECTANGLE |
+			PM2F_INCREASE_X | PM2F_INCREASE_Y |
+			PM2F_RENDER_FASTFILL |
+			PM2F_RENDER_SYNC_ON_BIT_MASK);
+	}
+
+	while (height--) {
+		int width = ((image->width + 7) >> 3)
+				+ info->pixmap.scan_align - 1;
+		width >>= 2;
+		WAIT_FIFO(par, width);
+		while (width--) {
+			pm2_WR(par, PM2R_BIT_MASK_PATTERN, *src);
+			src++;
+		}
+	}
+	WAIT_FIFO(par, 3);
+	pm2_WR(par, PM2R_RASTERIZER_MODE, 0);
+	pm2_WR(par, PM2R_COLOR_DDA_MODE, 0);
+	pm2_WR(par, PM2R_SCISSOR_MODE, 0);
+}
+
+/*
+ *	Hardware cursor support.
+ */
+static const u8 cursor_bits_lookup[16] = {
+	0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
+	0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
+};
+
+static int pm2vfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+	struct pm2fb_par *par = info->par;
+	u8 mode = PM2F_CURSORMODE_TYPE_X;
+	int x = cursor->image.dx - info->var.xoffset;
+	int y = cursor->image.dy - info->var.yoffset;
+
+	if (cursor->enable)
+		mode |= PM2F_CURSORMODE_CURSOR_ENABLE;
+
+	pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_MODE, mode);
+
+	if (!cursor->enable)
+		x = 2047;	/* push it outside display */
+	pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_X_LOW, x & 0xff);
+	pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_X_HIGH, (x >> 8) & 0xf);
+	pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_Y_LOW, y & 0xff);
+	pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_Y_HIGH, (y >> 8) & 0xf);
+
+	/*
+	 * If the cursor is not be changed this means either we want the
+	 * current cursor state (if enable is set) or we want to query what
+	 * we can do with the cursor (if enable is not set)
+	 */
+	if (!cursor->set)
+		return 0;
+
+	if (cursor->set & FB_CUR_SETHOT) {
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_X_HOT,
+			     cursor->hot.x & 0x3f);
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_Y_HOT,
+			     cursor->hot.y & 0x3f);
+	}
+
+	if (cursor->set & FB_CUR_SETCMAP) {
+		u32 fg_idx = cursor->image.fg_color;
+		u32 bg_idx = cursor->image.bg_color;
+		struct fb_cmap cmap = info->cmap;
+
+		/* the X11 driver says one should use these color registers */
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, PM2VI_RD_CURSOR_PALETTE >> 8);
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 0,
+			     cmap.red[bg_idx] >> 8 );
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 1,
+			     cmap.green[bg_idx] >> 8 );
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 2,
+			     cmap.blue[bg_idx] >> 8 );
+
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 3,
+			     cmap.red[fg_idx] >> 8 );
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 4,
+			     cmap.green[fg_idx] >> 8 );
+		pm2v_RDAC_WR(par, PM2VI_RD_CURSOR_PALETTE + 5,
+			     cmap.blue[fg_idx] >> 8 );
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+	}
+
+	if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
+		u8 *bitmap = (u8 *)cursor->image.data;
+		u8 *mask = (u8 *)cursor->mask;
+		int i;
+		int pos = PM2VI_RD_CURSOR_PATTERN;
+
+		for (i = 0; i < cursor->image.height; i++) {
+			int j = (cursor->image.width + 7) >> 3;
+			int k = 8 - j;
+
+			pm2_WR(par, PM2VR_RD_INDEX_HIGH, pos >> 8);
+
+			for (; j > 0; j--) {
+				u8 data = *bitmap ^ *mask;
+
+				if (cursor->rop == ROP_COPY)
+					data = *mask & *bitmap;
+				/* Upper 4 bits of bitmap data */
+				pm2v_RDAC_WR(par, pos++,
+					cursor_bits_lookup[data >> 4] |
+					(cursor_bits_lookup[*mask >> 4] << 1));
+				/* Lower 4 bits of bitmap */
+				pm2v_RDAC_WR(par, pos++,
+					cursor_bits_lookup[data & 0xf] |
+					(cursor_bits_lookup[*mask & 0xf] << 1));
+				bitmap++;
+				mask++;
+			}
+			for (; k > 0; k--) {
+				pm2v_RDAC_WR(par, pos++, 0);
+				pm2v_RDAC_WR(par, pos++, 0);
+			}
+		}
+
+		while (pos < (1024 + PM2VI_RD_CURSOR_PATTERN)) {
+			pm2_WR(par, PM2VR_RD_INDEX_HIGH, pos >> 8);
+			pm2v_RDAC_WR(par, pos++, 0);
+		}
+
+		pm2_WR(par, PM2VR_RD_INDEX_HIGH, 0);
+	}
+	return 0;
+}
+
+static int pm2fb_cursor(struct fb_info *info, struct fb_cursor *cursor)
+{
+	struct pm2fb_par *par = info->par;
+	u8 mode;
+
+	if (!hwcursor)
+		return -EINVAL;	/* just to force soft_cursor() call */
+
+	/* Too large of a cursor or wrong bpp :-( */
+	if (cursor->image.width > 64 ||
+	    cursor->image.height > 64 ||
+	    cursor->image.depth > 1)
+		return -EINVAL;
+
+	if (par->type == PM2_TYPE_PERMEDIA2V)
+		return pm2vfb_cursor(info, cursor);
+
+	mode = 0x40;
+	if (cursor->enable)
+		 mode = 0x43;
+
+	pm2_RDAC_WR(par, PM2I_RD_CURSOR_CONTROL, mode);
+
+	/*
+	 * If the cursor is not be changed this means either we want the
+	 * current cursor state (if enable is set) or we want to query what
+	 * we can do with the cursor (if enable is not set)
+	 */
+	if (!cursor->set)
+		return 0;
+
+	if (cursor->set & FB_CUR_SETPOS) {
+		int x = cursor->image.dx - info->var.xoffset + 63;
+		int y = cursor->image.dy - info->var.yoffset + 63;
+
+		WAIT_FIFO(par, 4);
+		pm2_WR(par, PM2R_RD_CURSOR_X_LSB, x & 0xff);
+		pm2_WR(par, PM2R_RD_CURSOR_X_MSB, (x >> 8) & 0x7);
+		pm2_WR(par, PM2R_RD_CURSOR_Y_LSB, y & 0xff);
+		pm2_WR(par, PM2R_RD_CURSOR_Y_MSB, (y >> 8) & 0x7);
+	}
+
+	if (cursor->set & FB_CUR_SETCMAP) {
+		u32 fg_idx = cursor->image.fg_color;
+		u32 bg_idx = cursor->image.bg_color;
+
+		WAIT_FIFO(par, 7);
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_ADDRESS, 1);
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+			info->cmap.red[bg_idx] >> 8);
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+			info->cmap.green[bg_idx] >> 8);
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+			info->cmap.blue[bg_idx] >> 8);
+
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+			info->cmap.red[fg_idx] >> 8);
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+			info->cmap.green[fg_idx] >> 8);
+		pm2_WR(par, PM2R_RD_CURSOR_COLOR_DATA,
+			info->cmap.blue[fg_idx] >> 8);
+	}
+
+	if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
+		u8 *bitmap = (u8 *)cursor->image.data;
+		u8 *mask = (u8 *)cursor->mask;
+		int i;
+
+		WAIT_FIFO(par, 1);
+		pm2_WR(par, PM2R_RD_PALETTE_WRITE_ADDRESS, 0);
+
+		for (i = 0; i < cursor->image.height; i++) {
+			int j = (cursor->image.width + 7) >> 3;
+			int k = 8 - j;
+
+			WAIT_FIFO(par, 8);
+			for (; j > 0; j--) {
+				u8 data = *bitmap ^ *mask;
+
+				if (cursor->rop == ROP_COPY)
+					data = *mask & *bitmap;
+				/* bitmap data */
+				pm2_WR(par, PM2R_RD_CURSOR_DATA, data);
+				bitmap++;
+				mask++;
+			}
+			for (; k > 0; k--)
+				pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+		}
+		for (; i < 64; i++) {
+			int j = 8;
+			WAIT_FIFO(par, 8);
+			while (j-- > 0)
+				pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+		}
+
+		mask = (u8 *)cursor->mask;
+		for (i = 0; i < cursor->image.height; i++) {
+			int j = (cursor->image.width + 7) >> 3;
+			int k = 8 - j;
+
+			WAIT_FIFO(par, 8);
+			for (; j > 0; j--) {
+				/* mask */
+				pm2_WR(par, PM2R_RD_CURSOR_DATA, *mask);
+				mask++;
+			}
+			for (; k > 0; k--)
+				pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+		}
+		for (; i < 64; i++) {
+			int j = 8;
+			WAIT_FIFO(par, 8);
+			while (j-- > 0)
+				pm2_WR(par, PM2R_RD_CURSOR_DATA, 0);
+		}
+	}
+	return 0;
+}
+
+/* ------------ Hardware Independent Functions ------------ */
+
+/*
+ *  Frame buffer operations
+ */
+
+static const struct fb_ops pm2fb_ops = {
+	.owner		= THIS_MODULE,
+	__FB_DEFAULT_IOMEM_OPS_RDWR,
+	.fb_check_var	= pm2fb_check_var,
+	.fb_set_par	= pm2fb_set_par,
+	.fb_setcolreg	= pm2fb_setcolreg,
+	.fb_blank	= pm2fb_blank,
+	.fb_pan_display	= pm2fb_pan_display,
+	.fb_fillrect	= pm2fb_fillrect,
+	.fb_copyarea	= pm2fb_copyarea,
+	.fb_imageblit	= pm2fb_imageblit,
+	.fb_sync	= pm2fb_sync,
+	.fb_cursor	= pm2fb_cursor,
+	__FB_DEFAULT_IOMEM_OPS_MMAP,
+};
+
+/*
+ * PCI stuff
+ */
+
+
+/**
+ * pm2fb_probe - Initialise and allocate resource for PCI device.
+ *
+ * @pdev:	PCI device.
+ * @id:		PCI device ID.
+ */
+static int pm2fb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct pm2fb_par *default_par;
+	struct fb_info *info;
+	int err;
+	int retval = -ENXIO;
+
+	err = aperture_remove_conflicting_pci_devices(pdev, "pm2fb");
+	if (err)
+		return err;
+
+	err = pci_enable_device(pdev);
+	if (err) {
+		printk(KERN_WARNING "pm2fb: Can't enable pdev: %d\n", err);
+		return err;
+	}
+
+	info = framebuffer_alloc(sizeof(struct pm2fb_par), &pdev->dev);
+	if (!info) {
+		err = -ENOMEM;
+		goto err_exit_disable;
+	}
+	default_par = info->par;
+
+	switch (pdev->device) {
+	case  PCI_DEVICE_ID_TI_TVP4020:
+		strcpy(pm2fb_fix.id, "TVP4020");
+		default_par->type = PM2_TYPE_PERMEDIA2;
+		break;
+	case  PCI_DEVICE_ID_3DLABS_PERMEDIA2:
+		strcpy(pm2fb_fix.id, "Permedia2");
+		default_par->type = PM2_TYPE_PERMEDIA2;
+		break;
+	case  PCI_DEVICE_ID_3DLABS_PERMEDIA2V:
+		strcpy(pm2fb_fix.id, "Permedia2v");
+		default_par->type = PM2_TYPE_PERMEDIA2V;
+		break;
+	}
+
+	pm2fb_fix.mmio_start = pci_resource_start(pdev, 0);
+	pm2fb_fix.mmio_len = PM2_REGS_SIZE;
+
+#if defined(__BIG_ENDIAN)
+	/*
+	 * PM2 has a 64k register file, mapped twice in 128k. Lower
+	 * map is little-endian, upper map is big-endian.
+	 */
+	pm2fb_fix.mmio_start += PM2_REGS_SIZE;
+	DPRINTK("Adjusting register base for big-endian.\n");
+#endif
+	DPRINTK("Register base at 0x%lx\n", pm2fb_fix.mmio_start);
+
+	/* Registers - request region and map it. */
+	if (!request_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len,
+				"pm2fb regbase")) {
+		printk(KERN_WARNING "pm2fb: Can't reserve regbase.\n");
+		goto err_exit_neither;
+	}
+	default_par->v_regs =
+		ioremap(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len);
+	if (!default_par->v_regs) {
+		printk(KERN_WARNING "pm2fb: Can't remap %s register area.\n",
+		       pm2fb_fix.id);
+		release_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len);
+		goto err_exit_neither;
+	}
+
+	/* Stash away memory register info for use when we reset the board */
+	default_par->mem_control = pm2_RD(default_par, PM2R_MEM_CONTROL);
+	default_par->boot_address = pm2_RD(default_par, PM2R_BOOT_ADDRESS);
+	default_par->mem_config = pm2_RD(default_par, PM2R_MEM_CONFIG);
+	DPRINTK("MemControl 0x%x BootAddress 0x%x MemConfig 0x%x\n",
+		default_par->mem_control, default_par->boot_address,
+		default_par->mem_config);
+
+	if (default_par->mem_control == 0 &&
+		default_par->boot_address == 0x31 &&
+		default_par->mem_config == 0x259fffff) {
+		default_par->memclock = CVPPC_MEMCLOCK;
+		default_par->mem_control = 0;
+		default_par->boot_address = 0x20;
+		default_par->mem_config = 0xe6002021;
+		if (pdev->subsystem_vendor == 0x1048 &&
+			pdev->subsystem_device == 0x0a31) {
+			DPRINTK("subsystem_vendor: %04x, "
+				"subsystem_device: %04x\n",
+				pdev->subsystem_vendor, pdev->subsystem_device);
+			DPRINTK("We have not been initialized by VGA BIOS and "
+				"are running on an Elsa Winner 2000 Office\n");
+			DPRINTK("Initializing card timings manually...\n");
+			default_par->memclock = 100000;
+		}
+		if (pdev->subsystem_vendor == 0x3d3d &&
+			pdev->subsystem_device == 0x0100) {
+			DPRINTK("subsystem_vendor: %04x, "
+				"subsystem_device: %04x\n",
+				pdev->subsystem_vendor, pdev->subsystem_device);
+			DPRINTK("We have not been initialized by VGA BIOS and "
+				"are running on an 3dlabs reference board\n");
+			DPRINTK("Initializing card timings manually...\n");
+			default_par->memclock = 74894;
+		}
+	}
+
+	/* Now work out how big lfb is going to be. */
+	switch (default_par->mem_config & PM2F_MEM_CONFIG_RAM_MASK) {
+	case PM2F_MEM_BANKS_1:
+		pm2fb_fix.smem_len = 0x200000;
+		break;
+	case PM2F_MEM_BANKS_2:
+		pm2fb_fix.smem_len = 0x400000;
+		break;
+	case PM2F_MEM_BANKS_3:
+		pm2fb_fix.smem_len = 0x600000;
+		break;
+	case PM2F_MEM_BANKS_4:
+		pm2fb_fix.smem_len = 0x800000;
+		break;
+	}
+	pm2fb_fix.smem_start = pci_resource_start(pdev, 1);
+
+	/* Linear frame buffer - request region and map it. */
+	if (!request_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len,
+				"pm2fb smem")) {
+		printk(KERN_WARNING "pm2fb: Can't reserve smem.\n");
+		goto err_exit_mmio;
+	}
+	info->screen_base =
+		ioremap_wc(pm2fb_fix.smem_start, pm2fb_fix.smem_len);
+	if (!info->screen_base) {
+		printk(KERN_WARNING "pm2fb: Can't ioremap smem area.\n");
+		release_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len);
+		goto err_exit_mmio;
+	}
+
+	if (!nomtrr)
+		default_par->wc_cookie = arch_phys_wc_add(pm2fb_fix.smem_start,
+							  pm2fb_fix.smem_len);
+
+	info->fbops		= &pm2fb_ops;
+	info->fix		= pm2fb_fix;
+	info->pseudo_palette	= default_par->palette;
+	info->flags		= FBINFO_HWACCEL_YPAN |
+				  FBINFO_HWACCEL_COPYAREA |
+				  FBINFO_HWACCEL_IMAGEBLIT |
+				  FBINFO_HWACCEL_FILLRECT;
+
+	info->pixmap.addr = kmalloc(PM2_PIXMAP_SIZE, GFP_KERNEL);
+	if (!info->pixmap.addr) {
+		retval = -ENOMEM;
+		goto err_exit_pixmap;
+	}
+	info->pixmap.size = PM2_PIXMAP_SIZE;
+	info->pixmap.buf_align = 4;
+	info->pixmap.scan_align = 4;
+	info->pixmap.access_align = 32;
+	info->pixmap.flags = FB_PIXMAP_SYSTEM;
+
+	if (noaccel) {
+		printk(KERN_DEBUG "disabling acceleration\n");
+		info->flags |= FBINFO_HWACCEL_DISABLED;
+		info->pixmap.scan_align = 1;
+	}
+
+	if (!mode_option)
+		mode_option = "640x480@60";
+
+	err = fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 8);
+	if (!err || err == 4)
+		info->var = pm2fb_var;
+
+	retval = fb_alloc_cmap(&info->cmap, 256, 0);
+	if (retval < 0)
+		goto err_exit_both;
+
+	retval = register_framebuffer(info);
+	if (retval < 0)
+		goto err_exit_all;
+
+	fb_info(info, "%s frame buffer device, memory = %dK\n",
+		info->fix.id, pm2fb_fix.smem_len / 1024);
+
+	/*
+	 * Our driver data
+	 */
+	pci_set_drvdata(pdev, info);
+
+	return 0;
+
+ err_exit_all:
+	fb_dealloc_cmap(&info->cmap);
+ err_exit_both:
+	kfree(info->pixmap.addr);
+ err_exit_pixmap:
+	arch_phys_wc_del(default_par->wc_cookie);
+	iounmap(info->screen_base);
+	release_mem_region(pm2fb_fix.smem_start, pm2fb_fix.smem_len);
+ err_exit_mmio:
+	iounmap(default_par->v_regs);
+	release_mem_region(pm2fb_fix.mmio_start, pm2fb_fix.mmio_len);
+ err_exit_neither:
+	framebuffer_release(info);
+ err_exit_disable:
+	pci_disable_device(pdev);
+	return retval;
+}
+
+/**
+ * pm2fb_remove - Release all device resources.
+ *
+ * @pdev:	PCI device to clean up.
+ */
+static void pm2fb_remove(struct pci_dev *pdev)
+{
+	struct fb_info *info = pci_get_drvdata(pdev);
+	struct fb_fix_screeninfo *fix = &info->fix;
+	struct pm2fb_par *par = info->par;
+
+	unregister_framebuffer(info);
+	arch_phys_wc_del(par->wc_cookie);
+	iounmap(info->screen_base);
+	release_mem_region(fix->smem_start, fix->smem_len);
+	iounmap(par->v_regs);
+	release_mem_region(fix->mmio_start, fix->mmio_len);
+
+	fb_dealloc_cmap(&info->cmap);
+	kfree(info->pixmap.addr);
+	framebuffer_release(info);
+	pci_disable_device(pdev);
+}
+
+static const struct pci_device_id pm2fb_id_table[] = {
+	{ PCI_VDEVICE(TI, PCI_DEVICE_ID_TI_TVP4020) },
+	{ PCI_VDEVICE(3DLABS, PCI_DEVICE_ID_3DLABS_PERMEDIA2) },
+	{ PCI_VDEVICE(3DLABS, PCI_DEVICE_ID_3DLABS_PERMEDIA2V) },
+	{ }
+};
+
+static struct pci_driver pm2fb_driver = {
+	.name		= "pm2fb",
+	.id_table	= pm2fb_id_table,
+	.probe		= pm2fb_probe,
+	.remove		= pm2fb_remove,
+};
+
+MODULE_DEVICE_TABLE(pci, pm2fb_id_table);
+
+
+#ifndef MODULE
+/*
+ * Parse user specified options.
+ *
+ * This is, comma-separated options following `video=pm2fb:'.
+ */
+static int __init pm2fb_setup(char *options)
+{
+	char *this_opt;
+
+	if (!options || !*options)
+		return 0;
+
+	while ((this_opt = strsep(&options, ",")) != NULL) {
+		if (!*this_opt)
+			continue;
+		if (!strcmp(this_opt, "lowhsync"))
+			lowhsync = 1;
+		else if (!strcmp(this_opt, "lowvsync"))
+			lowvsync = 1;
+		else if (!strncmp(this_opt, "hwcursor=", 9))
+			hwcursor = simple_strtoul(this_opt + 9, NULL, 0);
+		else if (!strncmp(this_opt, "nomtrr", 6))
+			nomtrr = 1;
+		else if (!strncmp(this_opt, "noaccel", 7))
+			noaccel = 1;
+		else
+			mode_option = this_opt;
+	}
+	return 0;
+}
+#endif
+
+
+static int __init pm2fb_init(void)
+{
+#ifndef MODULE
+	char *option = NULL;
+#endif
+
+	if (fb_modesetting_disabled("pm2fb"))
+		return -ENODEV;
+
+#ifndef MODULE
+	if (fb_get_options("pm2fb", &option))
+		return -ENODEV;
+	pm2fb_setup(option);
+#endif
+
+	return pci_register_driver(&pm2fb_driver);
+}
+
+module_init(pm2fb_init);
+
+#ifdef MODULE
+/*
+ *  Cleanup
+ */
+
+static void __exit pm2fb_exit(void)
+{
+	pci_unregister_driver(&pm2fb_driver);
+}
+#endif
+
+#ifdef MODULE
+module_exit(pm2fb_exit);
+
+module_param(mode_option, charp, 0);
+MODULE_PARM_DESC(mode_option, "Initial video mode e.g. '648x480-8@60'");
+module_param_named(mode, mode_option, charp, 0);
+MODULE_PARM_DESC(mode, "Initial video mode e.g. '648x480-8@60' (deprecated)");
+module_param(lowhsync, bool, 0);
+MODULE_PARM_DESC(lowhsync, "Force horizontal sync low regardless of mode");
+module_param(lowvsync, bool, 0);
+MODULE_PARM_DESC(lowvsync, "Force vertical sync low regardless of mode");
+module_param(noaccel, bool, 0);
+MODULE_PARM_DESC(noaccel, "Disable acceleration");
+module_param(hwcursor, int, 0644);
+MODULE_PARM_DESC(hwcursor, "Enable hardware cursor "
+			"(1=enable, 0=disable, default=1)");
+module_param(nomtrr, bool, 0);
+MODULE_PARM_DESC(nomtrr, "Disable MTRR support (0 or 1=disabled) (default=0)");
+
+MODULE_AUTHOR("Jim Hague <jim.hague@acm.org>");
+MODULE_DESCRIPTION("Permedia2 framebuffer device driver");
+MODULE_LICENSE("GPL");
+#endif
-- 
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