linux-rp: merge .23 and .23+git from poky

1 files changed, 2590 insertions, 0 deletions

diff --git a/packages/linux/linux-rp-2.6.23/uvesafb-0.1-rc3-2.6.22.patch b/packages/linux/linux-rp-2.6.23/uvesafb-0.1-rc3-2.6.22.patch
new file mode 100644
index 0000000000..711375114f
--- /dev/null
+++ b/packages/linux/linux-rp-2.6.23/uvesafb-0.1-rc3-2.6.22.patch
@@ -0,0 +1,2590 @@
+---
+ Documentation/fb/uvesafb.txt |  188 +++
+ drivers/video/Kconfig        |   18 
+ drivers/video/Makefile       |    1 
+ drivers/video/modedb.c       |   28 
+ drivers/video/uvesafb.c      | 2058 +++++++++++++++++++++++++++++++++++++++++++
+ include/linux/connector.h    |    7 
+ include/video/Kbuild         |    2 
+ include/video/uvesafb.h      |  193 ++++
+ 8 files changed, 2479 insertions(+), 16 deletions(-)
+
+Index: linux-2.6.22/Documentation/fb/uvesafb.txt
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.22/Documentation/fb/uvesafb.txt	2007-08-28 21:56:34.000000000 +0100
+@@ -0,0 +1,188 @@
++
++uvesafb - A Generic Driver for VBE2+ compliant video cards
++==========================================================
++
++1. Requirements
++---------------
++
++uvesafb should work with any video card that has a Video BIOS compliant
++with the VBE 2.0 standard.
++
++Unlike other drivers, uvesafb makes use of a userspace helper called
++v86d.  v86d is used to run the x86 Video BIOS code in a simulated and
++controlled environment.  This allows uvesafb to function on arches other
++than x86.  Check the v86d documentation for a list of currently supported
++arches.
++
++v86d source code can be downloaded from the following website:
++  http://dev.gentoo.org/~spock/projects/uvesafb
++
++Please refer to the v86d documentation for detailed configuration and
++installation instructions.
++
++Note that the v86d userspace helper has to be available at all times in
++order for uvesafb to work properly.  If you want to use uvesafb during
++early boot, you will have to include v86d into an initramfs image, and
++either compile it into the kernel or use it as an initrd.
++
++2. Caveats and limitations
++--------------------------
++
++uvesafb is a _generic_ driver which supports a wide variety of video
++cards, but which is ultimately limited by the Video BIOS interface.
++The most important limitations are:
++
++- Lack of any type of acceleration.
++- A strict and limited set of supported video modes.  Often the native
++  or most optimal resolution/refresh rate for your setup will not work
++  with uvesafb, simply because the Video BIOS doesn't support the
++  video mode you want to use.  This can be especially painful with
++  widescreen panels, where native video modes don't have the 4:3 aspect
++  ratio, which is what most BIOS-es are limited to.
++- Adjusting the refresh rate is only possible with a VBE 3.0 compliant
++  Video BIOS.  Note that many nVidia Video BIOS-es claim to be VBE 3.0
++  compliant, while they simply ignore any refresh rate settings.
++
++3. Configuration
++----------------
++
++uvesafb can be compiled either as a module, or directly into the kernel.
++In both cases it supports the same set of configuration options, which
++are either given on the kernel command line or as module parameters, e.g.:
++
++ video=uvesafb:1024x768-32,mtrr:3,ywrap (compiled into the kernel)
++
++ # modprobe uvesafb mode=1024x768-32 mtrr=3 scroll=ywrap  (module)
++
++Accepted options:
++
++ypan    Enable display panning using the VESA protected mode
++        interface.  The visible screen is just a window of the
++        video memory, console scrolling is done by changing the
++        start of the window.  Available on x86 only.
++
++ywrap   Same as ypan, but assumes your gfx board can wrap-around
++        the video memory (i.e. starts reading from top if it
++        reaches the end of video memory).  Faster than ypan.
++		Available on x86 only.
++
++redraw  Scroll by redrawing the affected part of the screen, this
++        is the safe (and slow) default.
++
++(If you're using uvesafb as a module, the above three options are
++ used a parameter of the scroll option, e.g. scroll=ypan.)
++
++vgapal  Use the standard VGA registers for palette changes.
++
++pmipal  Use the protected mode interface for palette changes.
++        This is the default if the protected mode interface is
++        available.  Available on x86 only.
++
++mtrr:n  Setup memory type range registers for the framebuffer
++        where n:
++              0 - disabled (equivalent to nomtrr) (default)
++              1 - uncachable
++              2 - write-back
++              3 - write-combining
++              4 - write-through
++
++        If you see the following in dmesg, choose the type that matches
++        the old one.  In this example, use "mtrr:2".
++...
++mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining
++...
++
++nomtrr  Do not use memory type range registers.
++
++vremap:n
++        Remap 'n' MiB of video RAM.  If 0 or not specified, remap memory
++        according to video mode.
++
++vtotal:n
++        If the video BIOS of your card incorrectly determines the total
++        amount of video RAM, use this option to override the BIOS (in MiB).
++
++<mode>  The mode you want to set, in the standard modedb format.  Refer to
++        modedb.txt for a detailed description.  When uvesafb is compiled as
++        a module, the mode string should be provided as a value of the
++        'mode' option.
++
++vbemode:x
++        Force the use of VBE mode x.  The mode will only be set if it's
++        found in the VBE-provided list of supported modes.
++        NOTE: The mode number 'x' should be specified in VESA mode number
++        notation, not the Linux kernel one (eg. 257 instead of 769).
++        HINT: If you use this option because normal <mode> parameter does
++        not work for you and you use a X server, you'll probably want to
++        set the 'nocrtc' option to ensure that the video mode is properly
++        restored after console <-> X switches.
++
++nocrtc  Do not use CRTC timings while setting the video mode.  This option
++        has any effect only if the Video BIOS is VBE 3.0 compliant.  Use it
++        if you have problems with modes set the standard way.  Note that
++        using this option implies that any refresh rate adjustments will
++        be ignored and the refresh rate will stay at your BIOS default (60 Hz).
++
++noedid  Do not try to fetch and use EDID-provided modes.
++
++noblank Disable hardware blanking.
++
++v86d:path
++        Set path to the v86d executable. This option is only available as
++        a module parameter, and not as a part of the video= string.  If you
++        need to use it and have uvesafb built into the kernel, use
++        uvesafb.v86d="path".
++
++Additionally, the following parameters may be provided.  They all override the
++EDID-provided values and BIOS defaults.  Refer to your monitor's specs to get
++the correct values for maxhf, maxvf and maxclk for your hardware.
++
++maxhf:n     Maximum horizontal frequency (in kHz).
++maxvf:n     Maximum vertical frequency (in Hz).
++maxclk:n    Maximum pixel clock (in MHz).
++
++4. The sysfs interface
++----------------------
++
++uvesafb provides several sysfs nodes for configurable parameters and
++additional information.
++
++Driver attributes:
++
++/sys/bus/platform/drivers/uvesafb
++  - v86d (default: /sbin/v86d)
++    Path to the v86d executable. v86d is started by uvesafb
++    if an instance of the daemon isn't already running.
++
++Device attributes:
++
++/sys/bus/platform/drivers/uvesafb/uvesafb.0
++  - nocrtc
++    Use the default refresh rate (60 Hz) if set to 1.
++
++  - oem_product_name
++  - oem_product_rev
++  - oem_string
++  - oem_vendor
++    Information about the card and its maker.
++
++  - vbe_modes
++    A list of video modes supported by the Video BIOS along with their
++    VBE mode numbers in hex.
++
++  - vbe_version
++    A BCD value indicating the implemented VBE standard.
++
++5. Miscellaneous
++----------------
++
++Uvesafb will set a video mode with the default refresh rate and timings
++from the Video BIOS if you set pixclock to 0 in fb_var_screeninfo.
++
++
++--
++ Michal Januszewski <spock@gentoo.org>
++ Last updated: 2007-06-16
++
++ Documentation of the uvesafb options is loosely based on vesafb.txt.
++
+Index: linux-2.6.22/drivers/video/Kconfig
+===================================================================
+--- linux-2.6.22.orig/drivers/video/Kconfig	2007-08-28 21:56:33.000000000 +0100
++++ linux-2.6.22/drivers/video/Kconfig	2007-08-28 21:56:34.000000000 +0100
+@@ -592,6 +592,24 @@ config FB_TGA
+ 
+ 	  Say Y if you have one of those.
+ 
++config FB_UVESA
++	tristate "Userspace VESA VGA graphics support"
++	depends on FB && CONNECTOR
++	select FB_CFB_FILLRECT
++	select FB_CFB_COPYAREA
++	select FB_CFB_IMAGEBLIT
++	select FB_MODE_HELPERS
++	help
++	  This is the frame buffer driver for generic VBE 2.0 compliant
++	  graphic cards. It can also take advantage of VBE 3.0 features,
++	  such as refresh rate adjustment.
++
++	  This driver generally provides more features than vesafb but
++	  requires a userspace helper application called 'v86d'. See
++	  <file:Documentation/fb/uvesafb.txt> for more information.
++
++	  If unsure, say N.
++
+ config FB_VESA
+ 	bool "VESA VGA graphics support"
+ 	depends on (FB = y) && X86
+Index: linux-2.6.22/drivers/video/Makefile
+===================================================================
+--- linux-2.6.22.orig/drivers/video/Makefile	2007-08-28 21:56:33.000000000 +0100
++++ linux-2.6.22/drivers/video/Makefile	2007-08-28 21:56:34.000000000 +0100
+@@ -116,6 +116,7 @@ obj-$(CONFIG_FB_XILINX)           += xil
+ obj-$(CONFIG_FB_OMAP)             += omap/
+ 
+ # Platform or fallback drivers go here
++obj-$(CONFIG_FB_UVESA)            += uvesafb.o
+ obj-$(CONFIG_FB_VESA)             += vesafb.o
+ obj-$(CONFIG_FB_IMAC)             += imacfb.o
+ obj-$(CONFIG_FB_VGA16)            += vga16fb.o
+Index: linux-2.6.22/drivers/video/modedb.c
+===================================================================
+--- linux-2.6.22.orig/drivers/video/modedb.c	2007-08-28 21:54:13.000000000 +0100
++++ linux-2.6.22/drivers/video/modedb.c	2007-08-28 21:56:34.000000000 +0100
+@@ -606,26 +606,29 @@ done:
+ 	DPRINTK("Trying specified video mode%s %ix%i\n",
+ 	    refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);
+ 
+-	diff = refresh;
++	if (!refresh_specified)
++		diff = 0;
++	else
++		diff = refresh;
++
+ 	best = -1;
+ 	for (i = 0; i < dbsize; i++) {
+-		if (name_matches(db[i], name, namelen) ||
+-		    (res_specified && res_matches(db[i], xres, yres))) {
+-			if(!fb_try_mode(var, info, &db[i], bpp)) {
+-				if(!refresh_specified || db[i].refresh == refresh)
+-					return 1;
+-				else {
+-					if(diff > abs(db[i].refresh - refresh)) {
+-						diff = abs(db[i].refresh - refresh);
+-						best = i;
+-					}
++		if ((name_matches(db[i], name, namelen) ||
++		    (res_specified && res_matches(db[i], xres, yres))) &&
++		    !fb_try_mode(var, info, &db[i], bpp)) {
++			if (refresh_specified && db[i].refresh == refresh) {
++				return 1;
++			} else {
++				if (diff < db[i].refresh) {
++					diff = db[i].refresh;
++					best = i;
+ 				}
+ 			}
+ 		}
+ 	}
+ 	if (best != -1) {
+ 		fb_try_mode(var, info, &db[best], bpp);
+-		return 2;
++		return (refresh_specified) ? 2 : 1;
+ 	}
+ 
+ 	diff = xres + yres;
+@@ -938,6 +941,7 @@ void fb_destroy_modelist(struct list_hea
+ 		kfree(pos);
+ 	}
+ }
++EXPORT_SYMBOL_GPL(fb_destroy_modelist);
+ 
+ /**
+  * fb_videomode_to_modelist: convert mode array to mode list
+Index: linux-2.6.22/drivers/video/uvesafb.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.22/drivers/video/uvesafb.c	2007-08-28 21:56:34.000000000 +0100
+@@ -0,0 +1,2058 @@
++/*
++ * A framebuffer driver for VBE 2.0+ compliant video cards
++ *
++ * (c) 2007 Michal Januszewski <spock@gentoo.org>
++ *     Loosely based upon the vesafb driver.
++ *
++ */
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/skbuff.h>
++#include <linux/timer.h>
++#include <linux/completion.h>
++#include <linux/connector.h>
++#include <linux/random.h>
++#include <linux/platform_device.h>
++#include <linux/limits.h>
++#include <linux/fb.h>
++#include <linux/io.h>
++#include <linux/mutex.h>
++#include <video/edid.h>
++#include <video/vga.h>
++#include <video/uvesafb.h>
++#ifdef CONFIG_MTRR
++#include <asm/mtrr.h>
++#endif
++#include "edid.h"
++
++static struct cb_id uvesafb_cn_id = {
++	.idx = CN_IDX_V86D,
++	.val = CN_VAL_V86D_UVESAFB
++};
++static char v86d_path[PATH_MAX] = "/sbin/v86d";
++static char v86d_started;	/* has v86d been started by uvesafb? */
++
++static struct fb_fix_screeninfo uvesafb_fix __devinitdata = {
++	.id	= "VESA VGA",
++	.type	= FB_TYPE_PACKED_PIXELS,
++	.accel	= FB_ACCEL_NONE,
++	.visual = FB_VISUAL_TRUECOLOR,
++};
++
++static int mtrr		__devinitdata = 3; /* enable mtrr by default */
++static int blank	__devinitdata = 1; /* enable blanking by default */
++static int ypan		__devinitdata = 1; /* 0: scroll, 1: ypan, 2: ywrap */
++static int pmi_setpal	__devinitdata = 1; /* use PMI for palette changes */
++static int nocrtc	__devinitdata; /* ignore CRTC settings */
++static int noedid	__devinitdata; /* don't try DDC transfers */
++static int vram_remap	__devinitdata; /* set amt. of memory to be used */
++static int vram_total	__devinitdata; /* set total amount of memory */
++static u16 maxclk	__devinitdata; /* maximum pixel clock */
++static u16 maxvf	__devinitdata; /* maximum vertical frequency */
++static u16 maxhf	__devinitdata; /* maximum horizontal frequency */
++static u16 vbemode	__devinitdata; /* force use of a specific VBE mode */
++static char *mode_option __devinitdata;
++
++static struct uvesafb_ktask *uvfb_tasks[UVESAFB_TASKS_MAX];
++static DEFINE_MUTEX(uvfb_lock);
++
++/*
++ * A handler for replies from userspace.
++ *
++ * Make sure each message passes consistency checks and if it does,
++ * find the kernel part of the task struct, copy the registers and
++ * the buffer contents and then complete the task.
++ */
++static void uvesafb_cn_callback(void *data)
++{
++	struct cn_msg *msg = data;
++	struct uvesafb_task *utask;
++	struct uvesafb_ktask *task;
++
++	if (msg->seq >= UVESAFB_TASKS_MAX)
++		return;
++
++	mutex_lock(&uvfb_lock);
++	task = uvfb_tasks[msg->seq];
++
++	if (!task || msg->ack != task->ack) {
++		mutex_unlock(&uvfb_lock);
++		return;
++	}
++
++	utask = (struct uvesafb_task *)msg->data;
++
++	/* Sanity checks for the buffer length. */
++	if (task->t.buf_len < utask->buf_len ||
++	    utask->buf_len > msg->len - sizeof(*utask)) {
++		mutex_unlock(&uvfb_lock);
++		return;
++	}
++
++	uvfb_tasks[msg->seq] = NULL;
++	mutex_unlock(&uvfb_lock);
++
++	memcpy(&task->t, utask, sizeof(*utask));
++
++	if (task->t.buf_len && task->buf)
++		memcpy(task->buf, utask + 1, task->t.buf_len);
++
++	complete(task->done);
++	return;
++}
++
++static int uvesafb_helper_start(void)
++{
++	char *envp[] = {
++		"HOME=/",
++		"PATH=/sbin:/bin",
++		NULL,
++	};
++
++	char *argv[] = {
++		v86d_path,
++		NULL,
++	};
++
++	return call_usermodehelper(v86d_path, argv, envp, 1);
++}
++
++/*
++ * Execute a uvesafb task.
++ *
++ * Returns 0 if the task is executed successfully.
++ *
++ * A message sent to the userspace consists of the uvesafb_task
++ * struct and (optionally) a buffer. The uvesafb_task struct is
++ * a simplified version of uvesafb_ktask (its kernel counterpart)
++ * containing only the register values, flags and the length of
++ * the buffer.
++ *
++ * Each message is assigned a sequence number (increased linearly)
++ * and a random ack number. The sequence number is used as a key
++ * for the uvfb_tasks array which holds pointers to uvesafb_ktask
++ * structs for all requests.
++ */
++static int uvesafb_exec(struct uvesafb_ktask *task)
++{
++	static int seq;
++	struct cn_msg *m;
++	int err;
++	int len = sizeof(task->t) + task->t.buf_len;
++
++	/*
++	 * Check whether the message isn't longer than the maximum
++	 * allowed by connector.
++	 */
++	if (sizeof(*m) + len > CONNECTOR_MAX_MSG_SIZE) {
++		printk(KERN_WARNING "uvesafb: message too long (%d), "
++			"can't execute task\n", (int)(sizeof(*m) + len));
++		return -E2BIG;
++	}
++
++	m = kzalloc(sizeof(*m) + len, GFP_KERNEL);
++	if (!m)
++		return -ENOMEM;
++
++	init_completion(task->done);
++
++	memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
++	m->seq = seq;
++	m->len = len;
++	m->ack = random32();
++
++	/* uvesafb_task structure */
++	memcpy(m + 1, &task->t, sizeof(task->t));
++
++	/* Buffer */
++	memcpy((u8 *)(m + 1) + sizeof(task->t), task->buf, task->t.buf_len);
++
++	/*
++	 * Save the message ack number so that we can find the kernel
++	 * part of this task when a reply is received from userspace.
++	 */
++	task->ack = m->ack;
++
++	mutex_lock(&uvfb_lock);
++
++	/* If all slots are taken -- bail out. */
++	if (uvfb_tasks[seq]) {
++		mutex_unlock(&uvfb_lock);
++		return -EBUSY;
++	}
++
++	/* Save a pointer to the kernel part of the task struct. */
++	uvfb_tasks[seq] = task;
++	mutex_unlock(&uvfb_lock);
++
++	err = cn_netlink_send(m, 0, gfp_any());
++	if (err == -ESRCH) {
++		/*
++		 * Try to start the userspace helper if sending
++		 * the request failed the first time.
++		 */
++		err = uvesafb_helper_start();
++		if (err) {
++			printk(KERN_ERR "uvesafb: failed to execute %s\n",
++					v86d_path);
++			printk(KERN_ERR "uvesafb: make sure that the v86d "
++					"helper is installed and executable\n");
++		} else {
++			v86d_started = 1;
++			err = cn_netlink_send(m, 0, gfp_any());
++		}
++	}
++	kfree(m);
++
++	if (!err && !(task->t.flags & TF_EXIT))
++		err = !wait_for_completion_timeout(task->done,
++				msecs_to_jiffies(UVESAFB_TIMEOUT));
++
++	mutex_lock(&uvfb_lock);
++	uvfb_tasks[seq] = NULL;
++	mutex_unlock(&uvfb_lock);
++
++	seq++;
++	if (seq >= UVESAFB_TASKS_MAX)
++		seq = 0;
++
++	return err;
++}
++
++/*
++ * Free a uvesafb_ktask struct.
++ */
++static void uvesafb_free(struct uvesafb_ktask *task)
++{
++	if (task) {
++		if (task->done)
++			kfree(task->done);
++		kfree(task);
++	}
++}
++
++/*
++ * Prepare a uvesafb_ktask struct to be used again.
++ */
++static void uvesafb_reset(struct uvesafb_ktask *task)
++{
++	struct completion *cpl = task->done;
++
++	memset(task, 0, sizeof(*task));
++	task->done = cpl;
++}
++
++/*
++ * Allocate and prepare a uvesafb_ktask struct.
++ */
++static struct uvesafb_ktask *uvesafb_prep(void)
++{
++	struct uvesafb_ktask *task;
++
++	task = kzalloc(sizeof(*task), GFP_KERNEL);
++	if (task) {
++		task->done = kzalloc(sizeof(*task->done), GFP_KERNEL);
++		if (!task->done) {
++			kfree(task);
++			task = NULL;
++		}
++	}
++	return task;
++}
++
++static void uvesafb_setup_var(struct fb_var_screeninfo *var,
++		struct fb_info *info, struct vbe_mode_ib *mode)
++{
++	struct uvesafb_par *par = info->par;
++
++	var->vmode = FB_VMODE_NONINTERLACED;
++	var->sync = FB_SYNC_VERT_HIGH_ACT;
++
++	var->xres = mode->x_res;
++	var->yres = mode->y_res;
++	var->xres_virtual = mode->x_res;
++	var->yres_virtual = (par->ypan) ?
++			info->fix.smem_len / mode->bytes_per_scan_line :
++			mode->y_res;
++	var->xoffset = 0;
++	var->yoffset = 0;
++	var->bits_per_pixel = mode->bits_per_pixel;
++
++	if (var->bits_per_pixel == 15)
++		var->bits_per_pixel = 16;
++
++	if (var->bits_per_pixel > 8) {
++		var->red.offset    = mode->red_off;
++		var->red.length    = mode->red_len;
++		var->green.offset  = mode->green_off;
++		var->green.length  = mode->green_len;
++		var->blue.offset   = mode->blue_off;
++		var->blue.length   = mode->blue_len;
++		var->transp.offset = mode->rsvd_off;
++		var->transp.length = mode->rsvd_len;
++	} else {
++		var->red.offset    = 0;
++		var->green.offset  = 0;
++		var->blue.offset   = 0;
++		var->transp.offset = 0;
++
++		/*
++		 * We're assuming that we can switch the DAC to 8 bits. If
++		 * this proves to be incorrect, we'll update the fields
++		 * later in set_par().
++		 */
++		if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC) {
++			var->red.length    = 8;
++			var->green.length  = 8;
++			var->blue.length   = 8;
++			var->transp.length = 0;
++		} else {
++			var->red.length    = 6;
++			var->green.length  = 6;
++			var->blue.length   = 6;
++			var->transp.length = 0;
++		}
++	}
++}
++
++static int uvesafb_vbe_find_mode(struct uvesafb_par *par,
++		int xres, int yres, int depth, unsigned char flags)
++{
++	int i, match = -1, h = 0, d = 0x7fffffff;
++
++	for (i = 0; i < par->vbe_modes_cnt; i++) {
++		h = abs(par->vbe_modes[i].x_res - xres) +
++		    abs(par->vbe_modes[i].y_res - yres) +
++		    abs(depth - par->vbe_modes[i].depth);
++
++		/*
++		 * We have an exact match in terms of resolution
++		 * and depth.
++		 */
++		if (h == 0)
++			return i;
++
++		if (h < d || (h == d && par->vbe_modes[i].depth > depth)) {
++			d = h;
++			match = i;
++		}
++	}
++	i = 1;
++
++	if (flags & UVESAFB_EXACT_DEPTH &&
++			par->vbe_modes[match].depth != depth)
++		i = 0;
++
++	if (flags & UVESAFB_EXACT_RES && d > 24)
++		i = 0;
++
++	if (i != 0)
++		return match;
++	else
++		return -1;
++}
++
++static u8 *uvesafb_vbe_state_save(struct uvesafb_par *par)
++{
++	struct uvesafb_ktask *task;
++	u8 *state;
++	int err;
++
++	if (!par->vbe_state_size)
++		return NULL;
++
++	state = kmalloc(par->vbe_state_size, GFP_KERNEL);
++	if (!state)
++		return NULL;
++
++	task = uvesafb_prep();
++	if (!task) {
++		kfree(state);
++		return NULL;
++	}
++
++	task->t.regs.eax = 0x4f04;
++	task->t.regs.ecx = 0x000f;
++	task->t.regs.edx = 0x0001;
++	task->t.flags = TF_BUF_RET | TF_BUF_ESBX;
++	task->t.buf_len = par->vbe_state_size;
++	task->buf = state;
++	err = uvesafb_exec(task);
++
++	if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
++		printk(KERN_WARNING "uvesafb: VBE get state call "
++				"failed (eax=0x%x, err=%d)\n",
++				task->t.regs.eax, err);
++		kfree(state);
++		state = NULL;
++	}
++
++	uvesafb_free(task);
++	return state;
++}
++
++static void uvesafb_vbe_state_restore(struct uvesafb_par *par, u8 *state_buf)
++{
++	struct uvesafb_ktask *task;
++	int err;
++
++	if (!state_buf)
++		return;
++
++	task = uvesafb_prep();
++	if (!task)
++		return;
++
++	task->t.regs.eax = 0x4f04;
++	task->t.regs.ecx = 0x000f;
++	task->t.regs.edx = 0x0002;
++	task->t.buf_len = par->vbe_state_size;
++	task->t.flags = TF_BUF_ESBX;
++	task->buf = state_buf;
++
++	err = uvesafb_exec(task);
++	if (err || (task->t.regs.eax & 0xffff) != 0x004f)
++		printk(KERN_WARNING "uvesafb: VBE state restore call "
++				"failed (eax=0x%x, err=%d)\n",
++				task->t.regs.eax, err);
++
++	uvesafb_free(task);
++}
++
++static int __devinit uvesafb_vbe_getinfo(struct uvesafb_ktask *task,
++		struct uvesafb_par *par)
++{
++	int err;
++
++	task->t.regs.eax = 0x4f00;
++	task->t.flags = TF_VBEIB;
++	task->t.buf_len = sizeof(struct vbe_ib);
++	task->buf = &par->vbe_ib;
++	strncpy(par->vbe_ib.vbe_signature, "VBE2", 4);
++
++	err = uvesafb_exec(task);
++	if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
++		printk(KERN_ERR "uvesafb: Getting VBE info block failed "
++				"(eax=0x%x, err=%d)\n", (u32)task->t.regs.eax,
++				err);
++		return -EINVAL;
++	}
++
++	if (par->vbe_ib.vbe_version < 0x0200) {
++		printk(KERN_ERR "uvesafb: Sorry, pre-VBE 2.0 cards are "
++				"not supported.\n");
++		return -EINVAL;
++	}
++
++	if (!par->vbe_ib.mode_list_ptr) {
++		printk(KERN_ERR "uvesafb: Missing mode list!\n");
++		return -EINVAL;
++	}
++
++	printk(KERN_INFO "uvesafb: ");
++
++	/*
++	 * Convert string pointers and the mode list pointer into
++	 * usable addresses. Print informational messages about the
++	 * video adapter and its vendor.
++	 */
++	if (par->vbe_ib.oem_vendor_name_ptr)
++		printk("%s, ",
++			((char *)task->buf) + par->vbe_ib.oem_vendor_name_ptr);
++
++	if (par->vbe_ib.oem_product_name_ptr)
++		printk("%s, ",
++			((char *)task->buf) + par->vbe_ib.oem_product_name_ptr);
++
++	if (par->vbe_ib.oem_product_rev_ptr)
++		printk("%s, ",
++			((char *)task->buf) + par->vbe_ib.oem_product_rev_ptr);
++
++	if (par->vbe_ib.oem_string_ptr)
++		printk("OEM: %s, ",
++			((char *)task->buf) + par->vbe_ib.oem_string_ptr);
++
++	printk("VBE v%d.%d\n", ((par->vbe_ib.vbe_version & 0xff00) >> 8),
++			par->vbe_ib.vbe_version & 0xff);
++
++	return 0;
++}
++
++static int __devinit uvesafb_vbe_getmodes(struct uvesafb_ktask *task,
++		struct uvesafb_par *par)
++{
++	int off = 0, err;
++	u16 *mode;
++
++	par->vbe_modes_cnt = 0;
++
++	/* Count available modes. */
++	mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
++	while (*mode != 0xffff) {
++		par->vbe_modes_cnt++;
++		mode++;
++	}
++
++	par->vbe_modes = kzalloc(sizeof(struct vbe_mode_ib) *
++				par->vbe_modes_cnt, GFP_KERNEL);
++	if (!par->vbe_modes)
++		return -ENOMEM;
++
++	/* Get info about all available modes. */
++	mode = (u16 *) (((u8 *)&par->vbe_ib) + par->vbe_ib.mode_list_ptr);
++	while (*mode != 0xffff) {
++		struct vbe_mode_ib *mib;
++
++		uvesafb_reset(task);
++		task->t.regs.eax = 0x4f01;
++		task->t.regs.ecx = (u32) *mode;
++		task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
++		task->t.buf_len = sizeof(struct vbe_mode_ib);
++		task->buf = par->vbe_modes + off;
++
++		err = uvesafb_exec(task);
++		if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
++			printk(KERN_ERR "uvesafb: Getting mode info block "
++				"for mode 0x%x failed (eax=0x%x, err=%d)\n",
++				*mode, (u32)task->t.regs.eax, err);
++			return -EINVAL;
++		}
++
++		mib = task->buf;
++		mib->mode_id = *mode;
++
++		/*
++		 * We only want modes that are supported with the current
++		 * hardware configuration, color, graphics and that have
++		 * support for the LFB.
++		 */
++		if ((mib->mode_attr & VBE_MODE_MASK) == VBE_MODE_MASK &&
++				 mib->bits_per_pixel >= 8)
++			off++;
++		else
++			par->vbe_modes_cnt--;
++
++		mode++;
++		mib->depth = mib->red_len + mib->green_len + mib->blue_len;
++
++		/*
++		 * Handle 8bpp modes and modes with broken color component
++		 * lengths.
++		 */
++		if (mib->depth == 0 || (mib->depth == 24 &&
++					mib->bits_per_pixel == 32))
++			mib->depth = mib->bits_per_pixel;
++	}
++
++	return 0;
++}
++
++/*
++ * The Protected Mode Interface is 32-bit x86 code, so we only run it on
++ * x86 and not x86_64.
++ */
++#ifdef CONFIG_X86_32
++static int __devinit uvesafb_vbe_getpmi(struct uvesafb_ktask *task,
++		struct uvesafb_par *par)
++{
++	int i, err;
++
++	uvesafb_reset(task);
++	task->t.regs.eax = 0x4f0a;
++	task->t.regs.ebx = 0x0;
++	err = uvesafb_exec(task);
++
++	if ((task->t.regs.eax & 0xffff) != 0x4f || task->t.regs.es < 0xc000) {
++		par->pmi_setpal = par->ypan = 0;
++	} else {
++		par->pmi_base = (u16 *)phys_to_virt(((u32)task->t.regs.es << 4)
++						+ task->t.regs.edi);
++		par->pmi_start = (u8 *)par->pmi_base + par->pmi_base[1];
++		par->pmi_pal = (u8 *)par->pmi_base + par->pmi_base[2];
++		printk(KERN_INFO "uvesafb: protected mode interface info at "
++				 "%04x:%04x\n",
++				 (u16)task->t.regs.es, (u16)task->t.regs.edi);
++		printk(KERN_INFO "uvesafb: pmi: set display start = %p, "
++				 "set palette = %p\n", par->pmi_start,
++				 par->pmi_pal);
++
++		if (par->pmi_base[3]) {
++			printk(KERN_INFO "uvesafb: pmi: ports = ");
++			for (i = par->pmi_base[3]/2;
++					par->pmi_base[i] != 0xffff; i++)
++				printk("%x ", par->pmi_base[i]);
++			printk("\n");
++
++			if (par->pmi_base[i] != 0xffff) {
++				printk(KERN_INFO "uvesafb: can't handle memory"
++						 " requests, pmi disabled\n");
++				par->ypan = par->pmi_setpal = 0;
++			}
++		}
++	}
++	return 0;
++}
++#endif /* CONFIG_X86_32 */
++
++/*
++ * Check whether a video mode is supported by the Video BIOS and is
++ * compatible with the monitor limits.
++ */
++static int __devinit uvesafb_is_valid_mode(struct fb_videomode *mode,
++		struct fb_info *info)
++{
++	if (info->monspecs.gtf) {
++		fb_videomode_to_var(&info->var, mode);
++		if (fb_validate_mode(&info->var, info))
++			return 0;
++	}
++
++	if (uvesafb_vbe_find_mode(info->par, mode->xres, mode->yres, 8,
++				UVESAFB_EXACT_RES) == -1)
++		return 0;
++
++	return 1;
++}
++
++static int __devinit uvesafb_vbe_getedid(struct uvesafb_ktask *task,
++		struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++	int err = 0;
++
++	if (noedid || par->vbe_ib.vbe_version < 0x0300)
++		return -EINVAL;
++
++	task->t.regs.eax = 0x4f15;
++	task->t.regs.ebx = 0;
++	task->t.regs.ecx = 0;
++	task->t.buf_len = 0;
++	task->t.flags = 0;
++
++	err = uvesafb_exec(task);
++
++	if ((task->t.regs.eax & 0xffff) != 0x004f || err)
++		return -EINVAL;
++
++	if ((task->t.regs.ebx & 0x3) == 3) {
++		printk(KERN_INFO "uvesafb: VBIOS/hardware supports both "
++				 "DDC1 and DDC2 transfers\n");
++	} else if ((task->t.regs.ebx & 0x3) == 2) {
++		printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC2 "
++				 "transfers\n");
++	} else if ((task->t.regs.ebx & 0x3) == 1) {
++		printk(KERN_INFO "uvesafb: VBIOS/hardware supports DDC1 "
++				 "transfers\n");
++	} else {
++		printk(KERN_INFO "uvesafb: VBIOS/hardware doesn't support "
++				 "DDC transfers\n");
++		return -EINVAL;
++	}
++
++	task->t.regs.eax = 0x4f15;
++	task->t.regs.ebx = 1;
++	task->t.regs.ecx = task->t.regs.edx = 0;
++	task->t.flags = TF_BUF_RET | TF_BUF_ESDI;
++	task->t.buf_len = EDID_LENGTH;
++	task->buf = kzalloc(EDID_LENGTH, GFP_KERNEL);
++
++	err = uvesafb_exec(task);
++
++	if ((task->t.regs.eax & 0xffff) == 0x004f && !err) {
++		fb_edid_to_monspecs(task->buf, &info->monspecs);
++
++		if (info->monspecs.vfmax && info->monspecs.hfmax) {
++			/*
++			 * If the maximum pixel clock wasn't specified in
++			 * the EDID block, set it to 300 MHz.
++			 */
++			if (info->monspecs.dclkmax == 0)
++				info->monspecs.dclkmax = 300 * 1000000;
++			info->monspecs.gtf = 1;
++		}
++	} else {
++		err = -EINVAL;
++	}
++
++	kfree(task->buf);
++	return err;
++}
++
++static void __devinit uvesafb_vbe_getmonspecs(struct uvesafb_ktask *task,
++		struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++	int i;
++
++	memset(&info->monspecs, 0, sizeof(info->monspecs));
++
++	/*
++	 * If we don't get all necessary data from the EDID block,
++	 * mark it as incompatible with the GTF and set nocrtc so
++	 * that we always use the default BIOS refresh rate.
++	 */
++	if (uvesafb_vbe_getedid(task, info)) {
++		info->monspecs.gtf = 0;
++		par->nocrtc = 1;
++	}
++
++	/* Kernel command line overrides. */
++	if (maxclk)
++		info->monspecs.dclkmax = maxclk * 1000000;
++	if (maxvf)
++		info->monspecs.vfmax = maxvf;
++	if (maxhf)
++		info->monspecs.hfmax = maxhf * 1000;
++
++	/*
++	 * In case DDC transfers are not supported, the user can provide
++	 * monitor limits manually. Lower limits are set to "safe" values.
++	 */
++	if (info->monspecs.gtf == 0 && maxclk && maxvf && maxhf) {
++		info->monspecs.dclkmin = 0;
++		info->monspecs.vfmin = 60;
++		info->monspecs.hfmin = 29000;
++		info->monspecs.gtf = 1;
++		par->nocrtc = 0;
++	}
++
++	if (info->monspecs.gtf)
++		printk(KERN_INFO
++			"uvesafb: monitor limits: vf = %d Hz, hf = %d kHz, "
++			"clk = %d MHz\n", info->monspecs.vfmax,
++			(int)(info->monspecs.hfmax / 1000),
++			(int)(info->monspecs.dclkmax / 1000000));
++	else
++		printk(KERN_INFO "uvesafb: no monitor limits have been set, "
++				 "default refresh rate will be used\n");
++
++	/* Add VBE modes to the modelist. */
++	for (i = 0; i < par->vbe_modes_cnt; i++) {
++		struct fb_var_screeninfo var;
++		struct vbe_mode_ib *mode;
++		struct fb_videomode vmode;
++
++		mode = &par->vbe_modes[i];
++		memset(&var, 0, sizeof(var));
++
++		var.xres = mode->x_res;
++		var.yres = mode->y_res;
++
++		fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, &var, info);
++		fb_var_to_videomode(&vmode, &var);
++		fb_add_videomode(&vmode, &info->modelist);
++	}
++
++	/* Add valid VESA modes to our modelist. */
++	for (i = 0; i < VESA_MODEDB_SIZE; i++) {
++		if (uvesafb_is_valid_mode((struct fb_videomode *)
++						&vesa_modes[i], info))
++			fb_add_videomode(&vesa_modes[i], &info->modelist);
++	}
++
++	for (i = 0; i < info->monspecs.modedb_len; i++) {
++		if (uvesafb_is_valid_mode(&info->monspecs.modedb[i], info))
++			fb_add_videomode(&info->monspecs.modedb[i],
++					&info->modelist);
++	}
++
++	return;
++}
++
++static void __devinit uvesafb_vbe_getstatesize(struct uvesafb_ktask *task,
++		struct uvesafb_par *par)
++{
++	int err;
++
++	uvesafb_reset(task);
++
++	/*
++	 * Get the VBE state buffer size. We want all available
++	 * hardware state data (CL = 0x0f).
++	 */
++	task->t.regs.eax = 0x4f04;
++	task->t.regs.ecx = 0x000f;
++	task->t.regs.edx = 0x0000;
++	task->t.flags = 0;
++
++	err = uvesafb_exec(task);
++
++	if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
++		printk(KERN_WARNING "uvesafb: VBE state buffer size "
++			"cannot be determined (eax=0x%x, err=%d)\n",
++			task->t.regs.eax, err);
++		par->vbe_state_size = 0;
++		return;
++	}
++
++	par->vbe_state_size = 64 * (task->t.regs.ebx & 0xffff);
++}
++
++static int __devinit uvesafb_vbe_init(struct fb_info *info)
++{
++	struct uvesafb_ktask *task = NULL;
++	struct uvesafb_par *par = info->par;
++	int err;
++
++	task = uvesafb_prep();
++	if (!task)
++		return -ENOMEM;
++
++	err = uvesafb_vbe_getinfo(task, par);
++	if (err)
++		goto out;
++
++	err = uvesafb_vbe_getmodes(task, par);
++	if (err)
++		goto out;
++
++	par->nocrtc = nocrtc;
++#ifdef CONFIG_X86_32
++	par->pmi_setpal = pmi_setpal;
++	par->ypan = ypan;
++
++	if (par->pmi_setpal || par->ypan)
++		uvesafb_vbe_getpmi(task, par);
++#else
++	/* The protected mode interface is not available on non-x86. */
++	par->pmi_setpal = par->ypan = 0;
++#endif
++
++	INIT_LIST_HEAD(&info->modelist);
++	uvesafb_vbe_getmonspecs(task, info);
++	uvesafb_vbe_getstatesize(task, par);
++
++out:	uvesafb_free(task);
++	return err;
++}
++
++static int __devinit uvesafb_vbe_init_mode(struct fb_info *info)
++{
++	struct list_head *pos;
++	struct fb_modelist *modelist;
++	struct fb_videomode *mode;
++	struct uvesafb_par *par = info->par;
++	int i, modeid;
++
++	/* Has the user requested a specific VESA mode? */
++	if (vbemode) {
++		for (i = 0; i < par->vbe_modes_cnt; i++) {
++			if (par->vbe_modes[i].mode_id == vbemode) {
++				fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
++							&info->var, info);
++				/*
++				 * With pixclock set to 0, the default BIOS
++				 * timings will be used in set_par().
++				 */
++				info->var.pixclock = 0;
++				modeid = i;
++				goto gotmode;
++			}
++		}
++		printk(KERN_INFO "uvesafb: requested VBE mode 0x%x is "
++				 "unavailable\n", vbemode);
++		vbemode = 0;
++	}
++
++	/* Count the modes in the modelist */
++	i = 0;
++	list_for_each(pos, &info->modelist)
++		i++;
++
++	/*
++	 * Convert the modelist into a modedb so that we can use it with
++	 * fb_find_mode().
++	 */
++	mode = kzalloc(i * sizeof(*mode), GFP_KERNEL);
++	if (mode) {
++		i = 0;
++		list_for_each(pos, &info->modelist) {
++			modelist = list_entry(pos, struct fb_modelist, list);
++			mode[i] = modelist->mode;
++			i++;
++		}
++
++		if (!mode_option)
++			mode_option = UVESAFB_DEFAULT_MODE;
++
++		i = fb_find_mode(&info->var, info, mode_option, mode, i,
++			NULL, 8);
++
++		kfree(mode);
++	}
++
++	/* fb_find_mode() failed */
++	if (i == 0 || i >= 3) {
++		info->var.xres = 640;
++		info->var.yres = 480;
++		mode = (struct fb_videomode *)
++				fb_find_best_mode(&info->var, &info->modelist);
++
++		if (mode) {
++			fb_videomode_to_var(&info->var, mode);
++		} else {
++			modeid = par->vbe_modes[0].mode_id;
++			fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
++				    &info->var, info);
++			goto gotmode;
++		}
++	}
++
++	/* Look for a matching VBE mode. */
++	modeid = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres,
++			info->var.bits_per_pixel, UVESAFB_EXACT_RES);
++
++	if (modeid == -1)
++		return -EINVAL;
++
++gotmode:
++	uvesafb_setup_var(&info->var, info, &par->vbe_modes[modeid]);
++
++	/*
++	 * If we are not VBE3.0+ compliant, we're done -- the BIOS will
++	 * ignore our timings anyway.
++	 */
++	if (par->vbe_ib.vbe_version < 0x0300 || par->nocrtc)
++		fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60,
++					&info->var, info);
++
++	return modeid;
++}
++
++static int uvesafb_setpalette(struct uvesafb_pal_entry *entries, int count,
++		int start, struct fb_info *info)
++{
++	struct uvesafb_ktask *task;
++	struct uvesafb_par *par = info->par;
++	int i = par->mode_idx;
++	int err = 0;
++
++	/*
++	 * We support palette modifications for 8 bpp modes only, so
++	 * there can never be more than 256 entries.
++	 */
++	if (start + count > 256)
++		return -EINVAL;
++
++	/* Use VGA registers if mode is VGA-compatible. */
++	if (i >= 0 && i < par->vbe_modes_cnt &&
++	    par->vbe_modes[i].mode_attr & VBE_MODE_VGACOMPAT) {
++		for (i = 0; i < count; i++) {
++			outb_p(start + i,        dac_reg);
++			outb_p(entries[i].red,   dac_val);
++			outb_p(entries[i].green, dac_val);
++			outb_p(entries[i].blue,  dac_val);
++		}
++	}
++#ifdef CONFIG_X86_32
++	else if (par->pmi_setpal) {
++		__asm__ __volatile__(
++		"call *(%%esi)"
++		: /* no return value */
++		: "a" (0x4f09),         /* EAX */
++		  "b" (0),              /* EBX */
++		  "c" (count),          /* ECX */
++		  "d" (start),          /* EDX */
++		  "D" (entries),        /* EDI */
++		  "S" (&par->pmi_pal)); /* ESI */
++	}
++#endif
++	else {
++		task = uvesafb_prep();
++		if (!task)
++			return -ENOMEM;
++
++		task->t.regs.eax = 0x4f09;
++		task->t.regs.ebx = 0x0;
++		task->t.regs.ecx = count;
++		task->t.regs.edx = start;
++		task->t.flags = TF_BUF_ESDI;
++		task->t.buf_len = sizeof(struct uvesafb_pal_entry) * count;
++		task->buf = entries;
++
++		err = uvesafb_exec(task);
++		if ((task->t.regs.eax & 0xffff) != 0x004f)
++			err = 1;
++
++		uvesafb_free(task);
++	}
++	return err;
++}
++
++static int uvesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
++		unsigned blue, unsigned transp,
++		struct fb_info *info)
++{
++	struct uvesafb_pal_entry entry;
++	int shift = 16 - info->var.green.length;
++	int err = 0;
++
++	if (regno >= info->cmap.len)
++		return -EINVAL;
++
++	if (info->var.bits_per_pixel == 8) {
++		entry.red   = red   >> shift;
++		entry.green = green >> shift;
++		entry.blue  = blue  >> shift;
++		entry.pad   = 0;
++
++		err = uvesafb_setpalette(&entry, 1, regno, info);
++	} else if (regno < 16) {
++		switch (info->var.bits_per_pixel) {
++		case 16:
++			if (info->var.red.offset == 10) {
++				/* 1:5:5:5 */
++				((u32 *) (info->pseudo_palette))[regno] =
++						((red   & 0xf800) >>  1) |
++						((green & 0xf800) >>  6) |
++						((blue  & 0xf800) >> 11);
++			} else {
++				/* 0:5:6:5 */
++				((u32 *) (info->pseudo_palette))[regno] =
++						((red   & 0xf800)      ) |
++						((green & 0xfc00) >>  5) |
++						((blue  & 0xf800) >> 11);
++			}
++			break;
++
++		case 24:
++		case 32:
++			red   >>= 8;
++			green >>= 8;
++			blue  >>= 8;
++			((u32 *)(info->pseudo_palette))[regno] =
++				(red   << info->var.red.offset)   |
++				(green << info->var.green.offset) |
++				(blue  << info->var.blue.offset);
++			break;
++		}
++	}
++	return err;
++}
++
++static int uvesafb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
++{
++	struct uvesafb_pal_entry *entries;
++	int shift = 16 - info->var.green.length;
++	int i, err = 0;
++
++	if (info->var.bits_per_pixel == 8) {
++		if (cmap->start + cmap->len > info->cmap.start +
++		    info->cmap.len || cmap->start < info->cmap.start)
++			return -EINVAL;
++
++		entries = kmalloc(sizeof(*entries) * cmap->len, GFP_KERNEL);
++		if (!entries)
++			return -ENOMEM;
++
++		for (i = 0; i < cmap->len; i++) {
++			entries[i].red   = cmap->red[i]   >> shift;
++			entries[i].green = cmap->green[i] >> shift;
++			entries[i].blue  = cmap->blue[i]  >> shift;
++			entries[i].pad   = 0;
++		}
++		err = uvesafb_setpalette(entries, cmap->len, cmap->start, info);
++		kfree(entries);
++	} else {
++		/*
++		 * For modes with bpp > 8, we only set the pseudo palette in
++		 * the fb_info struct. We rely on uvesafb_setcolreg to do all
++		 * sanity checking.
++		 */
++		for (i = 0; i < cmap->len; i++) {
++			err |= uvesafb_setcolreg(cmap->start + i, cmap->red[i],
++						cmap->green[i], cmap->blue[i],
++						0, info);
++		}
++	}
++	return err;
++}
++
++static int uvesafb_pan_display(struct fb_var_screeninfo *var,
++		struct fb_info *info)
++{
++#ifdef CONFIG_X86_32
++	int offset;
++	struct uvesafb_par *par = info->par;
++
++	offset = (var->yoffset * info->fix.line_length + var->xoffset) / 4;
++
++	/*
++	 * It turns out it's not the best idea to do panning via vm86,
++	 * so we only allow it if we have a PMI.
++	 */
++	if (par->pmi_start) {
++		__asm__ __volatile__(
++			"call *(%%edi)"
++			: /* no return value */
++			: "a" (0x4f07),         /* EAX */
++			  "b" (0),              /* EBX */
++			  "c" (offset),         /* ECX */
++			  "d" (offset >> 16),   /* EDX */
++			  "D" (&par->pmi_start));    /* EDI */
++	}
++#endif
++	return 0;
++}
++
++static int uvesafb_blank(int blank, struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++	struct uvesafb_ktask *task;
++	int err = 1;
++
++	if (par->vbe_ib.capabilities & VBE_CAP_VGACOMPAT) {
++		int loop = 10000;
++		u8 seq = 0, crtc17 = 0;
++
++		if (blank == FB_BLANK_POWERDOWN) {
++			seq = 0x20;
++			crtc17 = 0x00;
++			err = 0;
++		} else {
++			seq = 0x00;
++			crtc17 = 0x80;
++			err = (blank == FB_BLANK_UNBLANK) ? 0 : -EINVAL;
++		}
++
++		vga_wseq(NULL, 0x00, 0x01);
++		seq |= vga_rseq(NULL, 0x01) & ~0x20;
++		vga_wseq(NULL, 0x00, seq);
++
++		crtc17 |= vga_rcrt(NULL, 0x17) & ~0x80;
++		while (loop--);
++		vga_wcrt(NULL, 0x17, crtc17);
++		vga_wseq(NULL, 0x00, 0x03);
++	} else {
++		task = uvesafb_prep();
++		if (!task)
++			return -ENOMEM;
++
++		task->t.regs.eax = 0x4f10;
++		switch (blank) {
++		case FB_BLANK_UNBLANK:
++			task->t.regs.ebx = 0x0001;
++			break;
++		case FB_BLANK_NORMAL:
++			task->t.regs.ebx = 0x0101;	/* standby */
++			break;
++		case FB_BLANK_POWERDOWN:
++			task->t.regs.ebx = 0x0401;	/* powerdown */
++			break;
++		default:
++			goto out;
++		}
++
++		err = uvesafb_exec(task);
++		if (err || (task->t.regs.eax & 0xffff) != 0x004f)
++			err = 1;
++out:		uvesafb_free(task);
++	}
++	return err;
++}
++
++static int uvesafb_open(struct fb_info *info, int user)
++{
++	struct uvesafb_par *par = info->par;
++	int cnt = atomic_read(&par->ref_count);
++
++	if (!cnt && par->vbe_state_size)
++		par->vbe_state_orig = uvesafb_vbe_state_save(par);
++
++	atomic_inc(&par->ref_count);
++	return 0;
++}
++
++static int uvesafb_release(struct fb_info *info, int user)
++{
++	struct uvesafb_ktask *task = NULL;
++	struct uvesafb_par *par = info->par;
++	int cnt = atomic_read(&par->ref_count);
++
++	if (!cnt)
++		return -EINVAL;
++
++	if (cnt != 1)
++		goto out;
++
++	task = uvesafb_prep();
++	if (!task)
++		goto out;
++
++	/* First, try to set the standard 80x25 text mode. */
++	task->t.regs.eax = 0x0003;
++	uvesafb_exec(task);
++
++	/*
++	 * Now try to restore whatever hardware state we might have
++	 * saved when the fb device was first opened.
++	 */
++	uvesafb_vbe_state_restore(par, par->vbe_state_orig);
++out:
++	atomic_dec(&par->ref_count);
++	if (task)
++		uvesafb_free(task);
++	return 0;
++}
++
++static int uvesafb_set_par(struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++	struct uvesafb_ktask *task = NULL;
++	struct vbe_crtc_ib *crtc = NULL;
++	struct vbe_mode_ib *mode = NULL;
++	int i, err = 0, depth = info->var.bits_per_pixel;
++
++	if (depth > 8 && depth != 32)
++		depth = info->var.red.length + info->var.green.length +
++			info->var.blue.length;
++
++	i = uvesafb_vbe_find_mode(par, info->var.xres, info->var.yres, depth,
++				 UVESAFB_EXACT_RES | UVESAFB_EXACT_DEPTH);
++	if (i >= 0)
++		mode = &par->vbe_modes[i];
++	else
++		return -EINVAL;
++
++	task = uvesafb_prep();
++	if (!task)
++		return -ENOMEM;
++setmode:
++	task->t.regs.eax = 0x4f02;
++	task->t.regs.ebx = mode->mode_id | 0x4000;	/* use LFB */
++
++	if (par->vbe_ib.vbe_version >= 0x0300 && !par->nocrtc &&
++	    info->var.pixclock != 0) {
++		task->t.regs.ebx |= 0x0800;		/* use CRTC data */
++		task->t.flags = TF_BUF_ESDI;
++		crtc = kzalloc(sizeof(struct vbe_crtc_ib), GFP_KERNEL);
++		if (!crtc) {
++			err = -ENOMEM;
++			goto out;
++		}
++		crtc->horiz_start = info->var.xres + info->var.right_margin;
++		crtc->horiz_end	  = crtc->horiz_start + info->var.hsync_len;
++		crtc->horiz_total = crtc->horiz_end + info->var.left_margin;
++
++		crtc->vert_start  = info->var.yres + info->var.lower_margin;
++		crtc->vert_end    = crtc->vert_start + info->var.vsync_len;
++		crtc->vert_total  = crtc->vert_end + info->var.upper_margin;
++
++		crtc->pixel_clock = PICOS2KHZ(info->var.pixclock) * 1000;
++		crtc->refresh_rate = (u16)(100 * (crtc->pixel_clock /
++				(crtc->vert_total * crtc->horiz_total)));
++
++		if (info->var.vmode & FB_VMODE_DOUBLE)
++			crtc->flags |= 0x1;
++		if (info->var.vmode & FB_VMODE_INTERLACED)
++			crtc->flags |= 0x2;
++		if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
++			crtc->flags |= 0x4;
++		if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
++			crtc->flags |= 0x8;
++		memcpy(&par->crtc, crtc, sizeof(*crtc));
++	} else {
++		memset(&par->crtc, 0, sizeof(*crtc));
++	}
++
++	task->t.buf_len = sizeof(struct vbe_crtc_ib);
++	task->buf = &par->crtc;
++
++	err = uvesafb_exec(task);
++	if (err || (task->t.regs.eax & 0xffff) != 0x004f) {
++		/*
++		 * The mode switch might have failed because we tried to
++		 * use our own timings.  Try again with the default timings.
++		 */
++		if (crtc != NULL) {
++			printk(KERN_WARNING "uvesafb: mode switch failed "
++				"(eax=0x%x, err=%d). Trying again with "
++				"default timings.\n", task->t.regs.eax, err);
++			uvesafb_reset(task);
++			kfree(crtc);
++			crtc = NULL;
++			info->var.pixclock = 0;
++			goto setmode;
++		} else {
++			printk(KERN_ERR "uvesafb: mode switch failed (eax="
++				"0x%x, err=%d)\n", task->t.regs.eax, err);
++			err = -EINVAL;
++			goto out;
++		}
++	}
++	par->mode_idx = i;
++
++	/* For 8bpp modes, always try to set the DAC to 8 bits. */
++	if (par->vbe_ib.capabilities & VBE_CAP_CAN_SWITCH_DAC &&
++	    mode->bits_per_pixel <= 8) {
++		uvesafb_reset(task);
++		task->t.regs.eax = 0x4f08;
++		task->t.regs.ebx = 0x0800;
++
++		err = uvesafb_exec(task);
++		if (err || (task->t.regs.eax & 0xffff) != 0x004f ||
++		    ((task->t.regs.ebx & 0xff00) >> 8) != 8) {
++			/*
++			 * We've failed to set the DAC palette format -
++			 * time to correct var.
++			 */
++			info->var.red.length    = 6;
++			info->var.green.length  = 6;
++			info->var.blue.length   = 6;
++		}
++	}
++
++	info->fix.visual = (info->var.bits_per_pixel == 8) ?
++				FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
++	info->fix.line_length = mode->bytes_per_scan_line;
++
++out:	if (crtc != NULL)
++		kfree(crtc);
++	uvesafb_free(task);
++
++	return err;
++}
++
++static void uvesafb_check_limits(struct fb_var_screeninfo *var,
++		struct fb_info *info)
++{
++	const struct fb_videomode *mode;
++	struct uvesafb_par *par = info->par;
++
++	/*
++	 * If pixclock is set to 0, then we're using default BIOS timings
++	 * and thus don't have to perform any checks here.
++	 */
++	if (!var->pixclock)
++		return;
++
++	if (par->vbe_ib.vbe_version < 0x0300) {
++		fb_get_mode(FB_VSYNCTIMINGS | FB_IGNOREMON, 60, var, info);
++		return;
++	}
++
++	if (!fb_validate_mode(var, info))
++		return;
++
++	mode = fb_find_best_mode(var, &info->modelist);
++	if (mode) {
++		if (mode->xres == var->xres && mode->yres == var->yres &&
++		    !(mode->vmode & (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE))) {
++			fb_videomode_to_var(var, mode);
++			return;
++		}
++	}
++
++	if (info->monspecs.gtf && !fb_get_mode(FB_MAXTIMINGS, 0, var, info))
++		return;
++	/* Use default refresh rate */
++	var->pixclock = 0;
++}
++
++static int uvesafb_check_var(struct fb_var_screeninfo *var,
++		struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++	struct vbe_mode_ib *mode = NULL;
++	int match = -1;
++	int depth = var->red.length + var->green.length + var->blue.length;
++
++	/*
++	 * Various apps will use bits_per_pixel to set the color depth,
++	 * which is theoretically incorrect, but which we'll try to handle
++	 * here.
++	 */
++	if (depth == 0 || abs(depth - var->bits_per_pixel) >= 8)
++		depth = var->bits_per_pixel;
++
++	match = uvesafb_vbe_find_mode(par, var->xres, var->yres, depth,
++						UVESAFB_EXACT_RES);
++	if (match == -1)
++		return -EINVAL;
++
++	mode = &par->vbe_modes[match];
++	uvesafb_setup_var(var, info, mode);
++
++	/*
++	 * Check whether we have remapped enough memory for this mode.
++	 * We might be called at an early stage, when we haven't remapped
++	 * any memory yet, in which case we simply skip the check.
++	 */
++	if (var->yres * mode->bytes_per_scan_line > info->fix.smem_len
++						&& info->fix.smem_len)
++		return -EINVAL;
++
++	if ((var->vmode & FB_VMODE_DOUBLE) &&
++				!(par->vbe_modes[match].mode_attr & 0x100))
++		var->vmode &= ~FB_VMODE_DOUBLE;
++
++	if ((var->vmode & FB_VMODE_INTERLACED) &&
++				!(par->vbe_modes[match].mode_attr & 0x200))
++		var->vmode &= ~FB_VMODE_INTERLACED;
++
++	uvesafb_check_limits(var, info);
++
++	var->xres_virtual = var->xres;
++	var->yres_virtual = (par->ypan) ?
++				info->fix.smem_len / mode->bytes_per_scan_line :
++				var->yres;
++	return 0;
++}
++
++static void uvesafb_save_state(struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++
++	if (par->vbe_state_saved)
++		kfree(par->vbe_state_saved);
++
++	par->vbe_state_saved = uvesafb_vbe_state_save(par);
++}
++
++static void uvesafb_restore_state(struct fb_info *info)
++{
++	struct uvesafb_par *par = info->par;
++
++	uvesafb_vbe_state_restore(par, par->vbe_state_saved);
++}
++
++static struct fb_ops uvesafb_ops = {
++	.owner		= THIS_MODULE,
++	.fb_open	= uvesafb_open,
++	.fb_release	= uvesafb_release,
++	.fb_setcolreg	= uvesafb_setcolreg,
++	.fb_setcmap	= uvesafb_setcmap,
++	.fb_pan_display	= uvesafb_pan_display,
++	.fb_blank	= uvesafb_blank,
++	.fb_fillrect	= cfb_fillrect,
++	.fb_copyarea	= cfb_copyarea,
++	.fb_imageblit	= cfb_imageblit,
++	.fb_check_var	= uvesafb_check_var,
++	.fb_set_par	= uvesafb_set_par,
++	.fb_save_state	= uvesafb_save_state,
++	.fb_restore_state = uvesafb_restore_state,
++};
++
++static void __devinit uvesafb_init_info(struct fb_info *info,
++		struct vbe_mode_ib *mode)
++{
++	unsigned int size_vmode;
++	unsigned int size_remap;
++	unsigned int size_total;
++	struct uvesafb_par *par = info->par;
++	int i, h;
++
++	info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par));
++	info->fix = uvesafb_fix;
++	info->fix.ypanstep = par->ypan ? 1 : 0;
++	info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0;
++
++	/*
++	 * If we were unable to get the state buffer size, disable
++	 * functions for saving and restoring the hardware state.
++	 */
++	if (par->vbe_state_size == 0) {
++		info->fbops->fb_save_state = NULL;
++		info->fbops->fb_restore_state = NULL;
++	}
++
++	/* Disable blanking if the user requested so. */
++	if (!blank)
++		info->fbops->fb_blank = NULL;
++
++	/*
++	 * Find out how much IO memory is required for the mode with
++	 * the highest resolution.
++	 */
++	size_remap = 0;
++	for (i = 0; i < par->vbe_modes_cnt; i++) {
++		h = par->vbe_modes[i].bytes_per_scan_line *
++					par->vbe_modes[i].y_res;
++		if (h > size_remap)
++			size_remap = h;
++	}
++	size_remap *= 2;
++
++	/*
++	 *   size_vmode -- that is the amount of memory needed for the
++	 *                 used video mode, i.e. the minimum amount of
++	 *                 memory we need.
++	 */
++	if (mode != NULL) {
++		size_vmode = info->var.yres * mode->bytes_per_scan_line;
++	} else {
++		size_vmode = info->var.yres * info->var.xres *
++			     ((info->var.bits_per_pixel + 7) >> 3);
++	}
++
++	/*
++	 *   size_total -- all video memory we have. Used for mtrr
++	 *                 entries, resource allocation and bounds
++	 *                 checking.
++	 */
++	size_total = par->vbe_ib.total_memory * 65536;
++	if (vram_total)
++		size_total = vram_total * 1024 * 1024;
++	if (size_total < size_vmode)
++		size_total = size_vmode;
++
++	/*
++	 *   size_remap -- the amount of video memory we are going to
++	 *                 use for vesafb.  With modern cards it is no
++	 *                 option to simply use size_total as th
++	 *                 wastes plenty of kernel address space.
++	 */
++	if (vram_remap)
++		size_remap = vram_remap * 1024 * 1024;
++	if (size_remap < size_vmode)
++		size_remap = size_vmode;
++	if (size_remap > size_total)
++		size_remap = size_total;
++
++	info->fix.smem_len = size_remap;
++	info->fix.smem_start = mode->phys_base_ptr;
++
++	/*
++	 * We have to set yres_virtual here because when setup_var() was
++	 * called, smem_len wasn't defined yet.
++	 */
++	info->var.yres_virtual = info->fix.smem_len /
++				 mode->bytes_per_scan_line;
++
++	if (par->ypan && info->var.yres_virtual > info->var.yres) {
++		printk(KERN_INFO "uvesafb: scrolling: %s "
++			"using protected mode interface, "
++			"yres_virtual=%d\n",
++			(par->ypan > 1) ? "ywrap" : "ypan",
++			info->var.yres_virtual);
++	} else {
++		printk(KERN_INFO "uvesafb: scrolling: redraw\n");
++		info->var.yres_virtual = info->var.yres;
++		par->ypan = 0;
++	}
++
++	info->flags = FBINFO_FLAG_DEFAULT |
++			(par->ypan) ? FBINFO_HWACCEL_YPAN : 0;
++
++	if (!par->ypan)
++		info->fbops->fb_pan_display = NULL;
++}
++
++static void uvesafb_init_mtrr(struct fb_info *info)
++{
++#ifdef CONFIG_MTRR
++	if (mtrr && !(info->fix.smem_start & (PAGE_SIZE - 1))) {
++		int temp_size = info->fix.smem_len;
++		unsigned int type = 0;
++
++		switch (mtrr) {
++		case 1:
++			type = MTRR_TYPE_UNCACHABLE;
++			break;
++		case 2:
++			type = MTRR_TYPE_WRBACK;
++			break;
++		case 3:
++			type = MTRR_TYPE_WRCOMB;
++			break;
++		case 4:
++			type = MTRR_TYPE_WRTHROUGH;
++			break;
++		default:
++			type = 0;
++			break;
++		}
++
++		if (type) {
++			int rc;
++
++			/* Find the largest power-of-two */
++			while (temp_size & (temp_size - 1))
++				temp_size &= (temp_size - 1);
++
++			/* Try and find a power of two to add */
++			do {
++				rc = mtrr_add(info->fix.smem_start,
++					      temp_size, type, 1);
++				temp_size >>= 1;
++			} while (temp_size >= PAGE_SIZE && rc == -EINVAL);
++		}
++	}
++#endif /* CONFIG_MTRR */
++}
++
++
++static ssize_t uvesafb_show_vbe_ver(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	return snprintf(buf, PAGE_SIZE, "%.4x\n", par->vbe_ib.vbe_version);
++}
++
++static DEVICE_ATTR(vbe_version, S_IRUGO, uvesafb_show_vbe_ver, NULL);
++
++static ssize_t uvesafb_show_vbe_modes(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++	int ret = 0, i;
++
++	for (i = 0; i < par->vbe_modes_cnt && ret < PAGE_SIZE; i++) {
++		ret += snprintf(buf + ret, PAGE_SIZE - ret,
++			"%dx%d-%d, 0x%.4x\n",
++			par->vbe_modes[i].x_res, par->vbe_modes[i].y_res,
++			par->vbe_modes[i].depth, par->vbe_modes[i].mode_id);
++	}
++
++	return ret;
++}
++
++static DEVICE_ATTR(vbe_modes, S_IRUGO, uvesafb_show_vbe_modes, NULL);
++
++static ssize_t uvesafb_show_vendor(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	if (par->vbe_ib.oem_vendor_name_ptr)
++		return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
++			(&par->vbe_ib) + par->vbe_ib.oem_vendor_name_ptr);
++	else
++		return 0;
++}
++
++static DEVICE_ATTR(oem_vendor, S_IRUGO, uvesafb_show_vendor, NULL);
++
++static ssize_t uvesafb_show_product_name(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	if (par->vbe_ib.oem_product_name_ptr)
++		return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
++			(&par->vbe_ib) + par->vbe_ib.oem_product_name_ptr);
++	else
++		return 0;
++}
++
++static DEVICE_ATTR(oem_product_name, S_IRUGO, uvesafb_show_product_name, NULL);
++
++static ssize_t uvesafb_show_product_rev(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	if (par->vbe_ib.oem_product_rev_ptr)
++		return snprintf(buf, PAGE_SIZE, "%s\n", (char *)
++			(&par->vbe_ib) + par->vbe_ib.oem_product_rev_ptr);
++	else
++		return 0;
++}
++
++static DEVICE_ATTR(oem_product_rev, S_IRUGO, uvesafb_show_product_rev, NULL);
++
++static ssize_t uvesafb_show_oem_string(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	if (par->vbe_ib.oem_string_ptr)
++		return snprintf(buf, PAGE_SIZE, "%s\n",
++			(char *)(&par->vbe_ib) + par->vbe_ib.oem_string_ptr);
++	else
++		return 0;
++}
++
++static DEVICE_ATTR(oem_string, S_IRUGO, uvesafb_show_oem_string, NULL);
++
++static ssize_t uvesafb_show_nocrtc(struct device *dev,
++		struct device_attribute *attr, char *buf)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	return snprintf(buf, PAGE_SIZE, "%d\n", par->nocrtc);
++}
++
++static ssize_t uvesafb_store_nocrtc(struct device *dev,
++		struct device_attribute *attr, const char *buf, size_t count)
++{
++	struct fb_info *info = platform_get_drvdata(to_platform_device(dev));
++	struct uvesafb_par *par = info->par;
++
++	if (count > 0) {
++		if (buf[0] == '0')
++			par->nocrtc = 0;
++		else
++			par->nocrtc = 1;
++	}
++	return count;
++}
++
++static DEVICE_ATTR(nocrtc, S_IRUGO | S_IWUSR, uvesafb_show_nocrtc,
++			uvesafb_store_nocrtc);
++
++static struct attribute *uvesafb_dev_attrs[] = {
++	&dev_attr_vbe_version.attr,
++	&dev_attr_vbe_modes.attr,
++	&dev_attr_oem_vendor.attr,
++	&dev_attr_oem_product_name.attr,
++	&dev_attr_oem_product_rev.attr,
++	&dev_attr_oem_string.attr,
++	&dev_attr_nocrtc.attr,
++	NULL,
++};
++
++static struct attribute_group uvesafb_dev_attgrp = {
++	.name = NULL,
++	.attrs = uvesafb_dev_attrs,
++};
++
++static int __devinit uvesafb_probe(struct platform_device *dev)
++{
++	struct fb_info *info;
++	struct vbe_mode_ib *mode = NULL;
++	struct uvesafb_par *par;
++	int err = 0, i;
++
++	info = framebuffer_alloc(sizeof(*par) +	sizeof(u32) * 256, &dev->dev);
++	if (!info)
++		return -ENOMEM;
++
++	par = info->par;
++
++	err = uvesafb_vbe_init(info);
++	if (err) {
++		printk(KERN_ERR "uvesafb: vbe_init() failed with %d\n", err);
++		goto out;
++	}
++
++	info->fbops = &uvesafb_ops;
++
++	i = uvesafb_vbe_init_mode(info);
++	if (i < 0) {
++		err = -EINVAL;
++		goto out;
++	} else {
++		mode = &par->vbe_modes[i];
++	}
++
++	if (fb_alloc_cmap(&info->cmap, 256, 0) < 0) {
++		err = -ENXIO;
++		goto out;
++	}
++
++	uvesafb_init_info(info, mode);
++
++	if (!request_mem_region(info->fix.smem_start, info->fix.smem_len,
++				"uvesafb")) {
++		printk(KERN_ERR "uvesafb: cannot reserve video memory at "
++				"0x%lx\n", info->fix.smem_start);
++		err = -EIO;
++		goto out_mode;
++	}
++
++	info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
++
++	if (!info->screen_base) {
++		printk(KERN_ERR
++			"uvesafb: abort, cannot ioremap 0x%x bytes of video "
++			"memory at 0x%lx\n",
++			info->fix.smem_len, info->fix.smem_start);
++		err = -EIO;
++		goto out_mem;
++	}
++
++	if (!request_region(0x3c0, 32, "uvesafb")) {
++		printk(KERN_ERR "uvesafb: request region 0x3c0-0x3e0 failed\n");
++		err = -EIO;
++		goto out_unmap;
++	}
++
++	uvesafb_init_mtrr(info);
++	platform_set_drvdata(dev, info);
++
++	if (register_framebuffer(info) < 0) {
++		printk(KERN_ERR
++			"uvesafb: failed to register framebuffer device\n");
++		err = -EINVAL;
++		goto out_reg;
++	}
++
++	printk(KERN_INFO "uvesafb: framebuffer at 0x%lx, mapped to 0x%p, "
++			"using %dk, total %dk\n", info->fix.smem_start,
++			info->screen_base, info->fix.smem_len/1024,
++			par->vbe_ib.total_memory * 64);
++	printk(KERN_INFO "fb%d: %s frame buffer device\n", info->node,
++			info->fix.id);
++
++	err = sysfs_create_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
++	if (err != 0)
++		printk(KERN_WARNING "fb%d: failed to register attributes\n",
++			info->node);
++
++	return 0;
++
++out_reg:
++	release_region(0x3c0, 32);
++out_unmap:
++	iounmap(info->screen_base);
++out_mem:
++	release_mem_region(info->fix.smem_start, info->fix.smem_len);
++out_mode:
++	if (!list_empty(&info->modelist))
++		fb_destroy_modelist(&info->modelist);
++	fb_destroy_modedb(info->monspecs.modedb);
++	fb_dealloc_cmap(&info->cmap);
++out:
++	if (par->vbe_modes)
++		kfree(par->vbe_modes);
++
++	framebuffer_release(info);
++	return err;
++}
++
++static int uvesafb_remove(struct platform_device *dev)
++{
++	struct fb_info *info = platform_get_drvdata(dev);
++
++	if (info) {
++		struct uvesafb_par *par = info->par;
++
++		sysfs_remove_group(&dev->dev.kobj, &uvesafb_dev_attgrp);
++		unregister_framebuffer(info);
++		release_region(0x3c0, 32);
++		iounmap(info->screen_base);
++		release_mem_region(info->fix.smem_start, info->fix.smem_len);
++		fb_destroy_modedb(info->monspecs.modedb);
++		fb_dealloc_cmap(&info->cmap);
++
++		if (par) {
++			if (par->vbe_modes)
++				kfree(par->vbe_modes);
++			if (par->vbe_state_orig)
++				kfree(par->vbe_state_orig);
++			if (par->vbe_state_saved)
++				kfree(par->vbe_state_saved);
++		}
++
++		framebuffer_release(info);
++	}
++	return 0;
++}
++
++static struct platform_driver uvesafb_driver = {
++	.probe  = uvesafb_probe,
++	.remove = uvesafb_remove,
++	.driver = {
++		.name = "uvesafb",
++	},
++};
++
++static struct platform_device *uvesafb_device;
++
++#ifndef MODULE
++static int __devinit uvesafb_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, "redraw"))
++			ypan = 0;
++		else if (!strcmp(this_opt, "ypan"))
++			ypan = 1;
++		else if (!strcmp(this_opt, "ywrap"))
++			ypan = 2;
++		else if (!strcmp(this_opt, "vgapal"))
++			pmi_setpal = 0;
++		else if (!strcmp(this_opt, "pmipal"))
++			pmi_setpal = 1;
++		else if (!strncmp(this_opt, "mtrr:", 5))
++			mtrr = simple_strtoul(this_opt+5, NULL, 0);
++		else if (!strcmp(this_opt, "nomtrr"))
++			mtrr = 0;
++		else if (!strcmp(this_opt, "nocrtc"))
++			nocrtc = 1;
++		else if (!strcmp(this_opt, "noedid"))
++			noedid = 1;
++		else if (!strcmp(this_opt, "noblank"))
++			blank = 0;
++		else if (!strncmp(this_opt, "vtotal:", 7))
++			vram_total = simple_strtoul(this_opt + 7, NULL, 0);
++		else if (!strncmp(this_opt, "vremap:", 7))
++			vram_remap = simple_strtoul(this_opt + 7, NULL, 0);
++		else if (!strncmp(this_opt, "maxhf:", 6))
++			maxhf = simple_strtoul(this_opt + 6, NULL, 0);
++		else if (!strncmp(this_opt, "maxvf:", 6))
++			maxvf = simple_strtoul(this_opt + 6, NULL, 0);
++		else if (!strncmp(this_opt, "maxclk:", 7))
++			maxclk = simple_strtoul(this_opt + 7, NULL, 0);
++		else if (!strncmp(this_opt, "vbemode:", 8))
++			vbemode = simple_strtoul(this_opt + 8, NULL, 0);
++		else if (this_opt[0] >= '0' && this_opt[0] <= '9') {
++			mode_option = this_opt;
++		} else {
++			printk(KERN_WARNING
++				"uvesafb: unrecognized option %s\n", this_opt);
++		}
++	}
++
++	return 0;
++}
++#endif /* !MODULE */
++
++static ssize_t show_v86d(struct device_driver *dev, char *buf)
++{
++	return snprintf(buf, PAGE_SIZE, "%s\n", v86d_path);
++}
++
++static ssize_t store_v86d(struct device_driver *dev, const char *buf,
++		size_t count)
++{
++	strncpy(v86d_path, buf, PATH_MAX);
++	return count;
++}
++
++static DRIVER_ATTR(v86d, S_IRUGO | S_IWUSR, show_v86d, store_v86d);
++
++static int __devinit uvesafb_init(void)
++{
++	int err;
++
++#ifndef MODULE
++	char *option = NULL;
++
++	if (fb_get_options("uvesafb", &option))
++		return -ENODEV;
++	uvesafb_setup(option);
++#endif
++	err = cn_add_callback(&uvesafb_cn_id, "uvesafb", uvesafb_cn_callback);
++	if (err)
++		return err;
++
++	err = platform_driver_register(&uvesafb_driver);
++
++	if (!err) {
++		uvesafb_device = platform_device_alloc("uvesafb", 0);
++		if (uvesafb_device)
++			err = platform_device_add(uvesafb_device);
++		else
++			err = -ENOMEM;
++
++		if (err) {
++			platform_device_put(uvesafb_device);
++			platform_driver_unregister(&uvesafb_driver);
++			cn_del_callback(&uvesafb_cn_id);
++			return err;
++		}
++
++		err = driver_create_file(&uvesafb_driver.driver,
++				&driver_attr_v86d);
++		if (err) {
++			printk(KERN_WARNING "uvesafb: failed to register "
++					"attributes\n");
++			err = 0;
++		}
++	}
++	return err;
++}
++
++module_init(uvesafb_init);
++
++static void __devexit uvesafb_exit(void)
++{
++	struct uvesafb_ktask *task;
++
++	if (v86d_started) {
++		task = uvesafb_prep();
++		if (task) {
++			task->t.flags = TF_EXIT;
++			uvesafb_exec(task);
++			uvesafb_free(task);
++		}
++	}
++
++	cn_del_callback(&uvesafb_cn_id);
++	driver_remove_file(&uvesafb_driver.driver, &driver_attr_v86d);
++	platform_device_unregister(uvesafb_device);
++	platform_driver_unregister(&uvesafb_driver);
++}
++
++module_exit(uvesafb_exit);
++
++static inline int param_get_scroll(char *buffer, struct kernel_param *kp)
++{
++	return 0;
++}
++
++static inline int param_set_scroll(const char *val, struct kernel_param *kp)
++{
++	ypan = 0;
++
++	if (!strcmp(val, "redraw"))
++		ypan = 0;
++	else if (!strcmp(val, "ypan"))
++		ypan = 1;
++	else if (!strcmp(val, "ywrap"))
++		ypan = 2;
++
++	return 0;
++}
++
++#define param_check_scroll(name, p) __param_check(name, p, void);
++
++module_param_named(scroll, ypan, scroll, 0);
++MODULE_PARM_DESC(scroll,
++	"Scrolling mode, set to 'redraw', ''ypan' or 'ywrap'");
++module_param_named(vgapal, pmi_setpal, invbool, 0);
++MODULE_PARM_DESC(vgapal, "Set palette using VGA registers");
++module_param_named(pmipal, pmi_setpal, bool, 0);
++MODULE_PARM_DESC(pmipal, "Set palette using PMI calls");
++module_param(mtrr, uint, 0);
++MODULE_PARM_DESC(mtrr,
++	"Memory Type Range Registers setting. Use 0 to disable.");
++module_param(blank, bool, 0);
++MODULE_PARM_DESC(blank, "Enable hardware blanking");
++module_param(nocrtc, bool, 0);
++MODULE_PARM_DESC(nocrtc, "Ignore CRTC timings when setting modes");
++module_param(noedid, bool, 0);
++MODULE_PARM_DESC(noedid,
++	"Ignore EDID-provided monitor limits when setting modes");
++module_param(vram_remap, uint, 0);
++MODULE_PARM_DESC(vram_remap, "Set amount of video memory to be used [MiB]");
++module_param(vram_total, uint, 0);
++MODULE_PARM_DESC(vram_total, "Set total amount of video memoery [MiB]");
++module_param(maxclk, ushort, 0);
++MODULE_PARM_DESC(maxclk, "Maximum pixelclock [MHz], overrides EDID data");
++module_param(maxhf, ushort, 0);
++MODULE_PARM_DESC(maxhf,
++	"Maximum horizontal frequency [kHz], overrides EDID data");
++module_param(maxvf, ushort, 0);
++MODULE_PARM_DESC(maxvf,
++	"Maximum vertical frequency [Hz], overrides EDID data");
++module_param_named(mode, mode_option, charp, 0);
++MODULE_PARM_DESC(mode,
++	"Specify initial video mode as \"<xres>x<yres>[-<bpp>][@<refresh>]\"");
++module_param(vbemode, ushort, 0);
++MODULE_PARM_DESC(vbemode,
++	"VBE mode number to set, overrides the 'mode' option");
++module_param_string(v86d, v86d_path, PATH_MAX, 0660);
++MODULE_PARM_DESC(v86d, "Path to the v86d userspace helper.");
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Michal Januszewski <spock@gentoo.org>");
++MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
++
+Index: linux-2.6.22/include/linux/connector.h
+===================================================================
+--- linux-2.6.22.orig/include/linux/connector.h	2007-08-28 21:54:13.000000000 +0100
++++ linux-2.6.22/include/linux/connector.h	2007-08-28 21:56:34.000000000 +0100
+@@ -36,14 +36,15 @@
+ #define CN_VAL_CIFS                     0x1
+ #define CN_W1_IDX			0x3	/* w1 communication */
+ #define CN_W1_VAL			0x1
++#define CN_IDX_V86D			0x4
++#define CN_VAL_V86D_UVESAFB		0x1
+ 
+-
+-#define CN_NETLINK_USERS		4
++#define CN_NETLINK_USERS		5
+ 
+ /*
+  * Maximum connector's message size.
+  */
+-#define CONNECTOR_MAX_MSG_SIZE 	1024
++#define CONNECTOR_MAX_MSG_SIZE	16384
+ 
+ /*
+  * idx and val are unique identifiers which 
+Index: linux-2.6.22/include/video/Kbuild
+===================================================================
+--- linux-2.6.22.orig/include/video/Kbuild	2007-08-28 21:54:13.000000000 +0100
++++ linux-2.6.22/include/video/Kbuild	2007-08-28 21:56:34.000000000 +0100
+@@ -1 +1 @@
+-unifdef-y += sisfb.h
++unifdef-y += sisfb.h uvesafb.h
+Index: linux-2.6.22/include/video/uvesafb.h
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.22/include/video/uvesafb.h	2007-08-28 21:56:34.000000000 +0100
+@@ -0,0 +1,193 @@
++#ifndef _UVESAFB_H
++#define _UVESAFB_H
++
++struct v86_regs {
++	__u32 ebx;
++	__u32 ecx;
++	__u32 edx;
++	__u32 esi;
++	__u32 edi;
++	__u32 ebp;
++	__u32 eax;
++	__u32 eip;
++	__u32 eflags;
++	__u32 esp;
++	__u16 cs;
++	__u16 ss;
++	__u16 es;
++	__u16 ds;
++	__u16 fs;
++	__u16 gs;
++};
++
++/* Task flags */
++#define TF_VBEIB	0x01
++#define TF_BUF_ESDI	0x02
++#define TF_BUF_ESBX	0x04
++#define TF_BUF_RET	0x08
++#define TF_EXIT		0x10
++
++struct uvesafb_task {
++	__u8 flags;
++	int buf_len;
++	struct v86_regs regs;
++};
++
++/* Constants for the capabilities field
++ * in vbe_ib */
++#define VBE_CAP_CAN_SWITCH_DAC	0x01
++#define VBE_CAP_VGACOMPAT	0x02
++
++/* The VBE Info Block */
++struct vbe_ib {
++	char  vbe_signature[4];
++	__u16 vbe_version;
++	__u32 oem_string_ptr;
++	__u32 capabilities;
++	__u32 mode_list_ptr;
++	__u16 total_memory;
++	__u16 oem_software_rev;
++	__u32 oem_vendor_name_ptr;
++	__u32 oem_product_name_ptr;
++	__u32 oem_product_rev_ptr;
++	__u8  reserved[222];
++	char  oem_data[256];
++	char  misc_data[512];
++} __attribute__ ((packed));
++
++#ifdef __KERNEL__
++
++/* VBE CRTC Info Block */
++struct vbe_crtc_ib {
++	u16 horiz_total;
++	u16 horiz_start;
++	u16 horiz_end;
++	u16 vert_total;
++	u16 vert_start;
++	u16 vert_end;
++	u8  flags;
++	u32 pixel_clock;
++	u16 refresh_rate;
++	u8  reserved[40];
++} __attribute__ ((packed));
++
++#define VBE_MODE_VGACOMPAT	0x20
++#define VBE_MODE_COLOR		0x08
++#define VBE_MODE_SUPPORTEDHW	0x01
++#define VBE_MODE_GRAPHICS	0x10
++#define VBE_MODE_LFB		0x80
++
++#define VBE_MODE_MASK		(VBE_MODE_COLOR | VBE_MODE_SUPPORTEDHW | \
++				VBE_MODE_GRAPHICS | VBE_MODE_LFB)
++
++/* VBE Mode Info Block */
++struct vbe_mode_ib {
++	/* for all VBE revisions */
++	u16 mode_attr;
++	u8  winA_attr;
++	u8  winB_attr;
++	u16 win_granularity;
++	u16 win_size;
++	u16 winA_seg;
++	u16 winB_seg;
++	u32 win_func_ptr;
++	u16 bytes_per_scan_line;
++
++	/* for VBE 1.2+ */
++	u16 x_res;
++	u16 y_res;
++	u8  x_char_size;
++	u8  y_char_size;
++	u8  planes;
++	u8  bits_per_pixel;
++	u8  banks;
++	u8  memory_model;
++	u8  bank_size;
++	u8  image_pages;
++	u8  reserved1;
++
++	/* Direct color fields for direct/6 and YUV/7 memory models. */
++	/* Offsets are bit positions of lsb in the mask. */
++	u8  red_len;
++	u8  red_off;
++	u8  green_len;
++	u8  green_off;
++	u8  blue_len;
++	u8  blue_off;
++	u8  rsvd_len;
++	u8  rsvd_off;
++	u8  direct_color_info;	/* direct color mode attributes */
++
++	/* for VBE 2.0+ */
++	u32 phys_base_ptr;
++	u8  reserved2[6];
++
++	/* for VBE 3.0+ */
++	u16 lin_bytes_per_scan_line;
++	u8  bnk_image_pages;
++	u8  lin_image_pages;
++	u8  lin_red_len;
++	u8  lin_red_off;
++	u8  lin_green_len;
++	u8  lin_green_off;
++	u8  lin_blue_len;
++	u8  lin_blue_off;
++	u8  lin_rsvd_len;
++	u8  lin_rsvd_off;
++	u32 max_pixel_clock;
++	u16 mode_id;
++	u8  depth;
++} __attribute__ ((packed));
++
++#define UVESAFB_DEFAULT_MODE "640x480-16"
++
++/* How long to wait for a reply from userspace [ms] */
++#define UVESAFB_TIMEOUT 5000
++
++/* Max number of concurrent tasks */
++#define UVESAFB_TASKS_MAX 16
++
++#define dac_reg	(0x3c8)
++#define dac_val	(0x3c9)
++
++struct uvesafb_pal_entry {
++	u_char blue, green, red, pad;
++} __attribute__ ((packed));
++
++struct uvesafb_ktask {
++	struct uvesafb_task t;
++	void *buf;
++	struct completion *done;
++	u32 ack;
++};
++
++static int uvesafb_exec(struct uvesafb_ktask *tsk);
++
++#define UVESAFB_EXACT_RES	1
++#define UVESAFB_EXACT_DEPTH	2
++
++struct uvesafb_par {
++	struct vbe_ib vbe_ib;		/* VBE Info Block */
++	struct vbe_mode_ib *vbe_modes;	/* list of supported VBE modes */
++	int vbe_modes_cnt;
++
++	u8 nocrtc;
++	u8 ypan;			/* 0 - nothing, 1 - ypan, 2 - ywrap */
++	u8 pmi_setpal;			/* PMI for palette changes */
++	u16 *pmi_base;			/* protected mode interface location */
++	void *pmi_start;
++	void *pmi_pal;
++	u8 *vbe_state_orig;		/*
++					 * original hardware state, before the
++					 * driver was loaded
++					 */
++	u8 *vbe_state_saved;		/* state saved by fb_save_state */
++	int vbe_state_size;
++	atomic_t ref_count;
++
++	int mode_idx;
++	struct vbe_crtc_ib crtc;
++};
++
++#endif /* __KERNEL__ */
++#endif /* _UVESAFB_H */