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authorKoen Kooi <koen@openembedded.org>2007-10-23 13:11:51 +0000
committerKoen Kooi <koen@openembedded.org>2007-10-23 13:11:51 +0000
commit79feff84d18b7b834da765114a892650eb720b77 (patch)
tree609a4d09038dcd04e3a92f96c175ce46ffe011e2 /packages/linux/linux-rp-2.6.23/uvesafb-0.1-rc3-2.6.22.patch
parent3d47489f97efa97b856febf65edcd66c1bd48f76 (diff)
linux-rp: merge .23 and .23+git from poky
Diffstat (limited to 'packages/linux/linux-rp-2.6.23/uvesafb-0.1-rc3-2.6.22.patch')
-rw-r--r--packages/linux/linux-rp-2.6.23/uvesafb-0.1-rc3-2.6.22.patch2590
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 */