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-rw-r--r--Documentation/fb/00-INDEX25
-rw-r--r--Documentation/fb/aty128fb.txt72
-rw-r--r--Documentation/fb/cirrusfb.txt97
-rw-r--r--Documentation/fb/framebuffer.txt345
-rw-r--r--Documentation/fb/intel810.txt272
-rw-r--r--Documentation/fb/internals.txt82
-rw-r--r--Documentation/fb/matroxfb.txt415
-rw-r--r--Documentation/fb/modedb.txt61
-rw-r--r--Documentation/fb/pvr2fb.txt61
-rw-r--r--Documentation/fb/pxafb.txt54
-rw-r--r--Documentation/fb/sa1100fb.txt39
-rw-r--r--Documentation/fb/sisfb.txt158
-rw-r--r--Documentation/fb/sstfb.txt174
-rw-r--r--Documentation/fb/tgafb.txt69
-rw-r--r--Documentation/fb/tridentfb.txt54
-rw-r--r--Documentation/fb/vesafb.txt167
16 files changed, 2145 insertions, 0 deletions
diff --git a/Documentation/fb/00-INDEX b/Documentation/fb/00-INDEX
new file mode 100644
index 000000000000..92e89aeef52e
--- /dev/null
+++ b/Documentation/fb/00-INDEX
@@ -0,0 +1,25 @@
+Index of files in Documentation/fb. If you think something about frame
+buffer devices needs an entry here, needs correction or you've written one
+please mail me.
+ Geert Uytterhoeven <geert@linux-m68k.org>
+
+00-INDEX
+ - this file
+framebuffer.txt
+ - introduction to frame buffer devices
+internals.txt
+ - quick overview of frame buffer device internals
+modedb.txt
+ - info on the video mode database
+aty128fb.txt
+ - info on the ATI Rage128 frame buffer driver
+clgenfb.txt
+ - info on the Cirrus Logic frame buffer driver
+matroxfb.txt
+ - info on the Matrox frame buffer driver
+pvr2fb.txt
+ - info on the PowerVR 2 frame buffer driver
+tgafb.txt
+ - info on the TGA (DECChip 21030) frame buffer driver
+vesafb.txt
+ - info on the VESA frame buffer device
diff --git a/Documentation/fb/aty128fb.txt b/Documentation/fb/aty128fb.txt
new file mode 100644
index 000000000000..069262fb619d
--- /dev/null
+++ b/Documentation/fb/aty128fb.txt
@@ -0,0 +1,72 @@
+[This file is cloned from VesaFB/matroxfb]
+
+What is aty128fb?
+=================
+
+This is a driver for a graphic framebuffer for ATI Rage128 based devices
+on Intel and PPC boxes.
+
+Advantages:
+
+ * It provides a nice large console (128 cols + 48 lines with 1024x768)
+ without using tiny, unreadable fonts.
+ * You can run XF68_FBDev on top of /dev/fb0
+ * Most important: boot logo :-)
+
+Disadvantages:
+
+ * graphic mode is slower than text mode... but you should not notice
+ if you use same resolution as you used in textmode.
+ * still experimental.
+
+
+How to use it?
+==============
+
+Switching modes is done using the video=aty128fb:<resolution>... modedb
+boot parameter or using `fbset' program.
+
+See Documentation/fb/modedb.txt for more information on modedb
+resolutions.
+
+You should compile in both vgacon (to boot if you remove your Rage128 from
+box) and aty128fb (for graphics mode). You should not compile-in vesafb
+unless you have primary display on non-Rage128 VBE2.0 device (see
+Documentation/fb/vesafb.txt for details).
+
+
+X11
+===
+
+XF68_FBDev should generally work fine, but it is non-accelerated. As of
+this document, 8 and 32bpp works fine. There have been palette issues
+when switching from X to console and back to X. You will have to restart
+X to fix this.
+
+
+Configuration
+=============
+
+You can pass kernel command line options to vesafb with
+`video=aty128fb:option1,option2:value2,option3' (multiple options should
+be separated by comma, values are separated from options by `:').
+Accepted options:
+
+noaccel - do not use acceleration engine. It is default.
+accel - use acceleration engine. Not finished.
+vmode:x - chooses PowerMacintosh video mode <x>. Depreciated.
+cmode:x - chooses PowerMacintosh colour mode <x>. Depreciated.
+<XxX@X> - selects startup videomode. See modedb.txt for detailed
+ explanation. Default is 640x480x8bpp.
+
+
+Limitations
+===========
+
+There are known and unknown bugs, features and misfeatures.
+Currently there are following known bugs:
+ + This driver is still experimental and is not finished. Too many
+ bugs/errata to list here.
+
+--
+Brad Douglas <brad@neruo.com>
diff --git a/Documentation/fb/cirrusfb.txt b/Documentation/fb/cirrusfb.txt
new file mode 100644
index 000000000000..f9436843e998
--- /dev/null
+++ b/Documentation/fb/cirrusfb.txt
@@ -0,0 +1,97 @@
+
+ Framebuffer driver for Cirrus Logic chipsets
+ Copyright 1999 Jeff Garzik <jgarzik@pobox.com>
+
+
+
+{ just a little something to get people going; contributors welcome! }
+
+
+
+Chip families supported:
+ SD64
+ Piccolo
+ Picasso
+ Spectrum
+ Alpine (GD-543x/4x)
+ Picasso4 (GD-5446)
+ GD-5480
+ Laguna (GD-546x)
+
+Bus's supported:
+ PCI
+ Zorro
+
+Architectures supported:
+ i386
+ Alpha
+ PPC (Motorola Powerstack)
+ m68k (Amiga)
+
+
+
+Default video modes
+-------------------
+At the moment, there are two kernel command line arguments supported:
+
+mode:640x480
+mode:800x600
+ or
+mode:1024x768
+
+Full support for startup video modes (modedb) will be integrated soon.
+
+Version 1.9.9.1
+---------------
+* Fix memory detection for 512kB case
+* 800x600 mode
+* Fixed timings
+* Hint for AXP: Use -accel false -vyres -1 when changing resolution
+
+
+Version 1.9.4.4
+---------------
+* Preliminary Laguna support
+* Overhaul color register routines.
+* Associated with the above, console colors are now obtained from a LUT
+ called 'palette' instead of from the VGA registers. This code was
+ modeled after that in atyfb and matroxfb.
+* Code cleanup, add comments.
+* Overhaul SR07 handling.
+* Bug fixes.
+
+
+Version 1.9.4.3
+---------------
+* Correctly set default startup video mode.
+* Do not override ram size setting. Define
+ CLGEN_USE_HARDCODED_RAM_SETTINGS if you _do_ want to override the RAM
+ setting.
+* Compile fixes related to new 2.3.x IORESOURCE_IO[PORT] symbol changes.
+* Use new 2.3.x resource allocation.
+* Some code cleanup.
+
+
+Version 1.9.4.2
+---------------
+* Casting fixes.
+* Assertions no longer cause an oops on purpose.
+* Bug fixes.
+
+
+Version 1.9.4.1
+---------------
+* Add compatibility support. Now requires a 2.1.x, 2.2.x or 2.3.x kernel.
+
+
+Version 1.9.4
+-------------
+* Several enhancements, smaller memory footprint, a few bugfixes.
+* Requires kernel 2.3.14-pre1 or later.
+
+
+Version 1.9.3
+-------------
+* Bundled with kernel 2.3.14-pre1 or later.
+
+
diff --git a/Documentation/fb/framebuffer.txt b/Documentation/fb/framebuffer.txt
new file mode 100644
index 000000000000..610e7801207b
--- /dev/null
+++ b/Documentation/fb/framebuffer.txt
@@ -0,0 +1,345 @@
+ The Frame Buffer Device
+ -----------------------
+
+Maintained by Geert Uytterhoeven <geert@linux-m68k.org>
+Last revised: May 10, 2001
+
+
+0. Introduction
+---------------
+
+The frame buffer device provides an abstraction for the graphics hardware. It
+represents the frame buffer of some video hardware and allows application
+software to access the graphics hardware through a well-defined interface, so
+the software doesn't need to know anything about the low-level (hardware
+register) stuff.
+
+The device is accessed through special device nodes, usually located in the
+/dev directory, i.e. /dev/fb*.
+
+
+1. User's View of /dev/fb*
+--------------------------
+
+From the user's point of view, the frame buffer device looks just like any
+other device in /dev. It's a character device using major 29; the minor
+specifies the frame buffer number.
+
+By convention, the following device nodes are used (numbers indicate the device
+minor numbers):
+
+ 0 = /dev/fb0 First frame buffer
+ 1 = /dev/fb1 Second frame buffer
+ ...
+ 31 = /dev/fb31 32nd frame buffer
+
+For backwards compatibility, you may want to create the following symbolic
+links:
+
+ /dev/fb0current -> fb0
+ /dev/fb1current -> fb1
+
+and so on...
+
+The frame buffer devices are also `normal' memory devices, this means, you can
+read and write their contents. You can, for example, make a screen snapshot by
+
+ cp /dev/fb0 myfile
+
+There also can be more than one frame buffer at a time, e.g. if you have a
+graphics card in addition to the built-in hardware. The corresponding frame
+buffer devices (/dev/fb0 and /dev/fb1 etc.) work independently.
+
+Application software that uses the frame buffer device (e.g. the X server) will
+use /dev/fb0 by default (older software uses /dev/fb0current). You can specify
+an alternative frame buffer device by setting the environment variable
+$FRAMEBUFFER to the path name of a frame buffer device, e.g. (for sh/bash
+users):
+
+ export FRAMEBUFFER=/dev/fb1
+
+or (for csh users):
+
+ setenv FRAMEBUFFER /dev/fb1
+
+After this the X server will use the second frame buffer.
+
+
+2. Programmer's View of /dev/fb*
+--------------------------------
+
+As you already know, a frame buffer device is a memory device like /dev/mem and
+it has the same features. You can read it, write it, seek to some location in
+it and mmap() it (the main usage). The difference is just that the memory that
+appears in the special file is not the whole memory, but the frame buffer of
+some video hardware.
+
+/dev/fb* also allows several ioctls on it, by which lots of information about
+the hardware can be queried and set. The color map handling works via ioctls,
+too. Look into <linux/fb.h> for more information on what ioctls exist and on
+which data structures they work. Here's just a brief overview:
+
+ - You can request unchangeable information about the hardware, like name,
+ organization of the screen memory (planes, packed pixels, ...) and address
+ and length of the screen memory.
+
+ - You can request and change variable information about the hardware, like
+ visible and virtual geometry, depth, color map format, timing, and so on.
+ If you try to change that information, the driver maybe will round up some
+ values to meet the hardware's capabilities (or return EINVAL if that isn't
+ possible).
+
+ - You can get and set parts of the color map. Communication is done with 16
+ bits per color part (red, green, blue, transparency) to support all
+ existing hardware. The driver does all the computations needed to apply
+ it to the hardware (round it down to less bits, maybe throw away
+ transparency).
+
+All this hardware abstraction makes the implementation of application programs
+easier and more portable. E.g. the X server works completely on /dev/fb* and
+thus doesn't need to know, for example, how the color registers of the concrete
+hardware are organized. XF68_FBDev is a general X server for bitmapped,
+unaccelerated video hardware. The only thing that has to be built into
+application programs is the screen organization (bitplanes or chunky pixels
+etc.), because it works on the frame buffer image data directly.
+
+For the future it is planned that frame buffer drivers for graphics cards and
+the like can be implemented as kernel modules that are loaded at runtime. Such
+a driver just has to call register_framebuffer() and supply some functions.
+Writing and distributing such drivers independently from the kernel will save
+much trouble...
+
+
+3. Frame Buffer Resolution Maintenance
+--------------------------------------
+
+Frame buffer resolutions are maintained using the utility `fbset'. It can
+change the video mode properties of a frame buffer device. Its main usage is
+to change the current video mode, e.g. during boot up in one of your /etc/rc.*
+or /etc/init.d/* files.
+
+Fbset uses a video mode database stored in a configuration file, so you can
+easily add your own modes and refer to them with a simple identifier.
+
+
+4. The X Server
+---------------
+
+The X server (XF68_FBDev) is the most notable application program for the frame
+buffer device. Starting with XFree86 release 3.2, the X server is part of
+XFree86 and has 2 modes:
+
+ - If the `Display' subsection for the `fbdev' driver in the /etc/XF86Config
+ file contains a
+
+ Modes "default"
+
+ line, the X server will use the scheme discussed above, i.e. it will start
+ up in the resolution determined by /dev/fb0 (or $FRAMEBUFFER, if set). You
+ still have to specify the color depth (using the Depth keyword) and virtual
+ resolution (using the Virtual keyword) though. This is the default for the
+ configuration file supplied with XFree86. It's the most simple
+ configuration, but it has some limitations.
+
+ - Therefore it's also possible to specify resolutions in the /etc/XF86Config
+ file. This allows for on-the-fly resolution switching while retaining the
+ same virtual desktop size. The frame buffer device that's used is still
+ /dev/fb0current (or $FRAMEBUFFER), but the available resolutions are
+ defined by /etc/XF86Config now. The disadvantage is that you have to
+ specify the timings in a different format (but `fbset -x' may help).
+
+To tune a video mode, you can use fbset or xvidtune. Note that xvidtune doesn't
+work 100% with XF68_FBDev: the reported clock values are always incorrect.
+
+
+5. Video Mode Timings
+---------------------
+
+A monitor draws an image on the screen by using an electron beam (3 electron
+beams for color models, 1 electron beam for monochrome monitors). The front of
+the screen is covered by a pattern of colored phosphors (pixels). If a phosphor
+is hit by an electron, it emits a photon and thus becomes visible.
+
+The electron beam draws horizontal lines (scanlines) from left to right, and
+from the top to the bottom of the screen. By modifying the intensity of the
+electron beam, pixels with various colors and intensities can be shown.
+
+After each scanline the electron beam has to move back to the left side of the
+screen and to the next line: this is called the horizontal retrace. After the
+whole screen (frame) was painted, the beam moves back to the upper left corner:
+this is called the vertical retrace. During both the horizontal and vertical
+retrace, the electron beam is turned off (blanked).
+
+The speed at which the electron beam paints the pixels is determined by the
+dotclock in the graphics board. For a dotclock of e.g. 28.37516 MHz (millions
+of cycles per second), each pixel is 35242 ps (picoseconds) long:
+
+ 1/(28.37516E6 Hz) = 35.242E-9 s
+
+If the screen resolution is 640x480, it will take
+
+ 640*35.242E-9 s = 22.555E-6 s
+
+to paint the 640 (xres) pixels on one scanline. But the horizontal retrace
+also takes time (e.g. 272 `pixels'), so a full scanline takes
+
+ (640+272)*35.242E-9 s = 32.141E-6 s
+
+We'll say that the horizontal scanrate is about 31 kHz:
+
+ 1/(32.141E-6 s) = 31.113E3 Hz
+
+A full screen counts 480 (yres) lines, but we have to consider the vertical
+retrace too (e.g. 49 `lines'). So a full screen will take
+
+ (480+49)*32.141E-6 s = 17.002E-3 s
+
+The vertical scanrate is about 59 Hz:
+
+ 1/(17.002E-3 s) = 58.815 Hz
+
+This means the screen data is refreshed about 59 times per second. To have a
+stable picture without visible flicker, VESA recommends a vertical scanrate of
+at least 72 Hz. But the perceived flicker is very human dependent: some people
+can use 50 Hz without any trouble, while I'll notice if it's less than 80 Hz.
+
+Since the monitor doesn't know when a new scanline starts, the graphics board
+will supply a synchronization pulse (horizontal sync or hsync) for each
+scanline. Similarly it supplies a synchronization pulse (vertical sync or
+vsync) for each new frame. The position of the image on the screen is
+influenced by the moments at which the synchronization pulses occur.
+
+The following picture summarizes all timings. The horizontal retrace time is
+the sum of the left margin, the right margin and the hsync length, while the
+vertical retrace time is the sum of the upper margin, the lower margin and the
+vsync length.
+
+ +----------+---------------------------------------------+----------+-------+
+ | | ^ | | |
+ | | |upper_margin | | |
+ | | „ | | |
+ +----------###############################################----------+-------+
+ | # ^ # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | left # | # right | hsync |
+ | margin # | xres # margin | len |
+ |<-------->#<---------------+--------------------------->#<-------->|<----->|
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # |yres # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # | # | |
+ | # „ # | |
+ +----------###############################################----------+-------+
+ | | ^ | | |
+ | | |lower_margin | | |
+ | | „ | | |
+ +----------+---------------------------------------------+----------+-------+
+ | | ^ | | |
+ | | |vsync_len | | |
+ | | „ | | |
+ +----------+---------------------------------------------+----------+-------+
+
+The frame buffer device expects all horizontal timings in number of dotclocks
+(in picoseconds, 1E-12 s), and vertical timings in number of scanlines.
+
+
+6. Converting XFree86 timing values info frame buffer device timings
+--------------------------------------------------------------------
+
+An XFree86 mode line consists of the following fields:
+ "800x600" 50 800 856 976 1040 600 637 643 666
+ < name > DCF HR SH1 SH2 HFL VR SV1 SV2 VFL
+
+The frame buffer device uses the following fields:
+
+ - pixclock: pixel clock in ps (pico seconds)
+ - left_margin: time from sync to picture
+ - right_margin: time from picture to sync
+ - upper_margin: time from sync to picture
+ - lower_margin: time from picture to sync
+ - hsync_len: length of horizontal sync
+ - vsync_len: length of vertical sync
+
+1) Pixelclock:
+ xfree: in MHz
+ fb: in picoseconds (ps)
+
+ pixclock = 1000000 / DCF
+
+2) horizontal timings:
+ left_margin = HFL - SH2
+ right_margin = SH1 - HR
+ hsync_len = SH2 - SH1
+
+3) vertical timings:
+ upper_margin = VFL - SV2
+ lower_margin = SV1 - VR
+ vsync_len = SV2 - SV1
+
+Good examples for VESA timings can be found in the XFree86 source tree,
+under "xc/programs/Xserver/hw/xfree86/doc/modeDB.txt".
+
+
+7. References
+-------------
+
+For more specific information about the frame buffer device and its
+applications, please refer to the Linux-fbdev website:
+
+ http://linux-fbdev.sourceforge.net/
+
+and to the following documentation:
+
+ - The manual pages for fbset: fbset(8), fb.modes(5)
+ - The manual pages for XFree86: XF68_FBDev(1), XF86Config(4/5)
+ - The mighty kernel sources:
+ o linux/drivers/video/
+ o linux/include/linux/fb.h
+ o linux/include/video/
+
+
+
+8. Mailing list
+---------------
+
+There are several frame buffer device related mailing lists at SourceForge:
+ - linux-fbdev-announce@lists.sourceforge.net, for announcements,
+ - linux-fbdev-user@lists.sourceforge.net, for generic user support,
+ - linux-fbdev-devel@lists.sourceforge.net, for project developers.
+
+Point your web browser to http://sourceforge.net/projects/linux-fbdev/ for
+subscription information and archive browsing.
+
+
+9. Downloading
+--------------
+
+All necessary files can be found at
+
+ ftp://ftp.uni-erlangen.de/pub/Linux/LOCAL/680x0/
+
+and on its mirrors.
+
+The latest version of fbset can be found at
+
+ http://home.tvd.be/cr26864/Linux/fbdev/
+
+
+10. Credits
+----------
+
+This readme was written by Geert Uytterhoeven, partly based on the original
+`X-framebuffer.README' by Roman Hodek and Martin Schaller. Section 6 was
+provided by Frank Neumann.
+
+The frame buffer device abstraction was designed by Martin Schaller.
diff --git a/Documentation/fb/intel810.txt b/Documentation/fb/intel810.txt
new file mode 100644
index 000000000000..fd68b162e4a1
--- /dev/null
+++ b/Documentation/fb/intel810.txt
@@ -0,0 +1,272 @@
+Intel 810/815 Framebuffer driver
+ Tony Daplas <adaplas@pol.net>
+ http://i810fb.sourceforge.net
+
+ March 17, 2002
+
+ First Released: July 2001
+================================================================
+
+A. Introduction
+ This is a framebuffer driver for various Intel 810/815 compatible
+graphics devices. These would include:
+
+ Intel 810
+ Intel 810E
+ Intel 810-DC100
+ Intel 815 Internal graphics only, 100Mhz FSB
+ Intel 815 Internal graphics only
+ Intel 815 Internal graphics and AGP
+
+B. Features
+
+ - Choice of using Discrete Video Timings, VESA Generalized Timing
+ Formula, or a framebuffer specific database to set the video mode
+
+ - Supports a variable range of horizontal and vertical resolution, and
+ vertical refresh rates if the VESA Generalized Timing Formula is
+ enabled.
+
+ - Supports color depths of 8, 16, 24 and 32 bits per pixel
+
+ - Supports pseudocolor, directcolor, or truecolor visuals
+
+ - Full and optimized hardware acceleration at 8, 16 and 24 bpp
+
+ - Robust video state save and restore
+
+ - MTRR support
+
+ - Utilizes user-entered monitor specifications to automatically
+ calculate required video mode parameters.
+
+ - Can concurrently run with xfree86 running with native i810 drivers
+
+ - Hardware Cursor Support
+
+C. List of available options
+
+ a. "video=i810fb"
+ enables the i810 driver
+
+ Recommendation: required
+
+ b. "xres:<value>"
+ select horizontal resolution in pixels
+
+ Recommendation: user preference
+ (default = 640)
+
+ c. "yres:<value>"
+ select vertical resolution in scanlines. If Discrete Video Timings
+ is enabled, this will be ignored and computed as 3*xres/4.
+
+ Recommendation: user preference
+ (default = 480)
+
+ d. "vyres:<value>"
+ select virtual vertical resolution in scanlines. If (0) or none
+ is specified, this will be computed against maximum available memory.
+
+ Recommendation: do not set
+ (default = 480)
+
+ e. "vram:<value>"
+ select amount of system RAM in MB to allocate for the video memory
+
+ Recommendation: 1 - 4 MB.
+ (default = 4)
+
+ f. "bpp:<value>"
+ select desired pixel depth
+
+ Recommendation: 8
+ (default = 8)
+
+ g. "hsync1/hsync2:<value>"
+ select the minimum and maximum Horizontal Sync Frequency of the
+ monitor in KHz. If a using a fixed frequency monitor, hsync1 must
+ be equal to hsync2.
+
+ Recommendation: check monitor manual for correct values
+ default (29/30)
+
+ h. "vsync1/vsync2:<value>"
+ select the minimum and maximum Vertical Sync Frequency of the monitor
+ in Hz. You can also use this option to lock your monitor's refresh
+ rate.
+
+ Recommendation: check monitor manual for correct values
+ (default = 60/60)
+
+ IMPORTANT: If you need to clamp your timings, try to give some
+ leeway for computational errors (over/underflows). Example: if
+ using vsync1/vsync2 = 60/60, make sure hsync1/hsync2 has at least
+ a 1 unit difference, and vice versa.
+
+ i. "voffset:<value>"
+ select at what offset in MB of the logical memory to allocate the
+ framebuffer memory. The intent is to avoid the memory blocks
+ used by standard graphics applications (XFree86). The default
+ offset (16 MB for a 64MB aperture, 8 MB for a 32MB aperture) will
+ avoid XFree86's usage and allows up to 7MB/15MB of framebuffer
+ memory. Depending on your usage, adjust the value up or down,
+ (0 for maximum usage, 31/63 MB for the least amount). Note, an
+ arbitrary setting may conflict with XFree86.
+
+ Recommendation: do not set
+ (default = 8 or 16 MB)
+
+ j. "accel"
+ enable text acceleration. This can be enabled/reenabled anytime
+ by using 'fbset -accel true/false'.
+
+ Recommendation: enable
+ (default = not set)
+
+ k. "mtrr"
+ enable MTRR. This allows data transfers to the framebuffer memory
+ to occur in bursts which can significantly increase performance.
+ Not very helpful with the i810/i815 because of 'shared memory'.
+
+ Recommendation: do not set
+ (default = not set)
+
+ l. "extvga"
+ if specified, secondary/external VGA output will always be enabled.
+ Useful if the BIOS turns off the VGA port when no monitor is attached.
+ The external VGA monitor can then be attached without rebooting.
+
+ Recommendation: do not set
+ (default = not set)
+
+ m. "sync"
+ Forces the hardware engine to do a "sync" or wait for the hardware
+ to finish before starting another instruction. This will produce a
+ more stable setup, but will be slower.
+
+ Recommendation: do not set
+ (default = not set)
+
+ n. "dcolor"
+ Use directcolor visual instead of truecolor for pixel depths greater
+ than 8 bpp. Useful for color tuning, such as gamma control.
+
+ Recommendation: do not set
+ (default = not set)
+
+D. Kernel booting
+
+Separate each option/option-pair by commas (,) and the option from its value
+with a colon (:) as in the following:
+
+video=i810fb:option1,option2:value2
+
+Sample Usage
+------------
+
+In /etc/lilo.conf, add the line:
+
+append="video=i810fb:vram:2,xres:1024,yres:768,bpp:8,hsync1:30,hsync2:55, \
+ vsync1:50,vsync2:85,accel,mtrr"
+
+This will initialize the framebuffer to 1024x768 at 8bpp. The framebuffer
+will use 2 MB of System RAM. MTRR support will be enabled. The refresh rate
+will be computed based on the hsync1/hsync2 and vsync1/vsync2 values.
+
+IMPORTANT:
+You must include hsync1, hsync2, vsync1 and vsync2 to enable video modes
+better than 640x480 at 60Hz.
+
+E. Module options
+
+ The module parameters are essentially similar to the kernel
+parameters. The main difference is that you need to include a Boolean value
+(1 for TRUE, and 0 for FALSE) for those options which don't need a value.
+
+Example, to enable MTRR, include "mtrr=1".
+
+Sample Usage
+------------
+
+Using the same setup as described above, load the module like this:
+
+ modprobe i810fb vram=2 xres=1024 bpp=8 hsync1=30 hsync2=55 vsync1=50 \
+ vsync2=85 accel=1 mtrr=1
+
+Or just add the following to /etc/modprobe.conf
+
+ options i810fb vram=2 xres=1024 bpp=16 hsync1=30 hsync2=55 vsync1=50 \
+ vsync2=85 accel=1 mtrr=1
+
+and just do a
+
+ modprobe i810fb
+
+
+F. Setup
+
+ a. Do your usual method of configuring the kernel.
+
+ make menuconfig/xconfig/config
+
+ b. Under "Code Maturity Options", enable "Prompt for experimental/
+ incomplete code/drivers".
+
+ c. Enable agpgart support for the Intel 810/815 on-board graphics.
+ This is required. The option is under "Character Devices"
+
+ d. Under "Graphics Support", select "Intel 810/815" either statically
+ or as a module. Choose "use VESA GTF for video timings" if you
+ need to maximize the capability of your display. To be on the
+ safe side, you can leave this unselected.
+
+ e. If you want a framebuffer console, enable it under "Console
+ Drivers"
+
+ f. Compile your kernel.
+
+ g. Load the driver as described in section D and E.
+
+ Optional:
+ h. If you are going to run XFree86 with its native drivers, the
+ standard XFree86 4.1.0 and 4.2.0 drivers should work as is.
+ However, there's a bug in the XFree86 i810 drivers. It attempts
+ to use XAA even when switched to the console. This will crash
+ your server. I have a fix at this site:
+
+ http://i810fb.sourceforge.net.
+
+ You can either use the patch, or just replace
+
+ /usr/X11R6/lib/modules/drivers/i810_drv.o
+
+ with the one provided at the website.
+
+ i. Try the DirectFB (http://www.directfb.org) + the i810 gfxdriver
+ patch to see the chipset in action (or inaction :-).
+
+G. Acknowledgment:
+
+ 1. Geert Uytterhoeven - his excellent howto and the virtual
+ framebuffer driver code made this possible.
+
+ 2. Jeff Hartmann for his agpgart code.
+
+ 3. The X developers. Insights were provided just by reading the
+ XFree86 source code.
+
+ 4. Intel(c). For this value-oriented chipset driver and for
+ providing documentation.
+
+ 5. Matt Sottek. His inputs and ideas helped in making some
+ optimizations possible.
+
+H. Home Page:
+
+ A more complete, and probably updated information is provided at
+http://i810fb.sourceforge.net.
+
+###########################
+Tony
+
diff --git a/Documentation/fb/internals.txt b/Documentation/fb/internals.txt
new file mode 100644
index 000000000000..9b2a2b2f3e57
--- /dev/null
+++ b/Documentation/fb/internals.txt
@@ -0,0 +1,82 @@
+
+This is a first start for some documentation about frame buffer device
+internals.
+
+Geert Uytterhoeven <geert@linux-m68k.org>, 21 July 1998
+James Simmons <jsimmons@user.sf.net>, Nov 26 2002
+
+--------------------------------------------------------------------------------
+
+ *** STRUCTURES USED BY THE FRAME BUFFER DEVICE API ***
+
+The following structures play a role in the game of frame buffer devices. They
+are defined in <linux/fb.h>.
+
+1. Outside the kernel (user space)
+
+ - struct fb_fix_screeninfo
+
+ Device independent unchangeable information about a frame buffer device and
+ a specific video mode. This can be obtained using the FBIOGET_FSCREENINFO
+ ioctl.
+
+ - struct fb_var_screeninfo
+
+ Device independent changeable information about a frame buffer device and a
+ specific video mode. This can be obtained using the FBIOGET_VSCREENINFO
+ ioctl, and updated with the FBIOPUT_VSCREENINFO ioctl. If you want to pan
+ the screen only, you can use the FBIOPAN_DISPLAY ioctl.
+
+ - struct fb_cmap
+
+ Device independent colormap information. You can get and set the colormap
+ using the FBIOGETCMAP and FBIOPUTCMAP ioctls.
+
+
+2. Inside the kernel
+
+ - struct fb_info
+
+ Generic information, API and low level information about a specific frame
+ buffer device instance (slot number, board address, ...).
+
+ - struct `par'
+
+ Device dependent information that uniquely defines the video mode for this
+ particular piece of hardware.
+
+
+--------------------------------------------------------------------------------
+
+ *** VISUALS USED BY THE FRAME BUFFER DEVICE API ***
+
+
+Monochrome (FB_VISUAL_MONO01 and FB_VISUAL_MONO10)
+-------------------------------------------------
+Each pixel is either black or white.
+
+
+Pseudo color (FB_VISUAL_PSEUDOCOLOR and FB_VISUAL_STATIC_PSEUDOCOLOR)
+---------------------------------------------------------------------
+The whole pixel value is fed through a programmable lookup table that has one
+color (including red, green, and blue intensities) for each possible pixel
+value, and that color is displayed.
+
+
+True color (FB_VISUAL_TRUECOLOR)
+--------------------------------
+The pixel value is broken up into red, green, and blue fields.
+
+
+Direct color (FB_VISUAL_DIRECTCOLOR)
+------------------------------------
+The pixel value is broken up into red, green, and blue fields, each of which
+are looked up in separate red, green, and blue lookup tables.
+
+
+Grayscale displays
+------------------
+Grayscale and static grayscale are special variants of pseudo color and static
+pseudo color, where the red, green and blue components are always equal to
+each other.
+
diff --git a/Documentation/fb/matroxfb.txt b/Documentation/fb/matroxfb.txt
new file mode 100644
index 000000000000..ad7a67707d62
--- /dev/null
+++ b/Documentation/fb/matroxfb.txt
@@ -0,0 +1,415 @@
+[This file is cloned from VesaFB. Thanks go to Gerd Knorr]
+
+What is matroxfb?
+=================
+
+This is a driver for a graphic framebuffer for Matrox devices on
+Alpha, Intel and PPC boxes.
+
+Advantages:
+
+ * It provides a nice large console (128 cols + 48 lines with 1024x768)
+ without using tiny, unreadable fonts.
+ * You can run XF{68,86}_FBDev or XFree86 fbdev driver on top of /dev/fb0
+ * Most important: boot logo :-)
+
+Disadvantages:
+
+ * graphic mode is slower than text mode... but you should not notice
+ if you use same resolution as you used in textmode.
+
+
+How to use it?
+==============
+
+Switching modes is done using the video=matroxfb:vesa:... boot parameter
+or using `fbset' program.
+
+If you want, for example, enable a resolution of 1280x1024x24bpp you should
+pass to the kernel this command line: "video=matroxfb:vesa:0x1BB".
+
+You should compile in both vgacon (to boot if you remove you Matrox from
+box) and matroxfb (for graphics mode). You should not compile-in vesafb
+unless you have primary display on non-Matrox VBE2.0 device (see
+Documentation/fb/vesafb.txt for details).
+
+Currently supported video modes are (through vesa:... interface, PowerMac
+has [as addon] compatibility code):
+
+
+[Graphic modes]
+
+bpp | 640x400 640x480 768x576 800x600 960x720
+----+--------------------------------------------
+ 4 | 0x12 0x102
+ 8 | 0x100 0x101 0x180 0x103 0x188
+ 15 | 0x110 0x181 0x113 0x189
+ 16 | 0x111 0x182 0x114 0x18A
+ 24 | 0x1B2 0x184 0x1B5 0x18C
+ 32 | 0x112 0x183 0x115 0x18B
+
+
+[Graphic modes (continued)]
+
+bpp | 1024x768 1152x864 1280x1024 1408x1056 1600x1200
+----+------------------------------------------------
+ 4 | 0x104 0x106
+ 8 | 0x105 0x190 0x107 0x198 0x11C
+ 15 | 0x116 0x191 0x119 0x199 0x11D
+ 16 | 0x117 0x192 0x11A 0x19A 0x11E
+ 24 | 0x1B8 0x194 0x1BB 0x19C 0x1BF
+ 32 | 0x118 0x193 0x11B 0x19B
+
+
+[Text modes]
+
+text | 640x400 640x480 1056x344 1056x400 1056x480
+-----+------------------------------------------------
+ 8x8 | 0x1C0 0x108 0x10A 0x10B 0x10C
+8x16 | 2, 3, 7 0x109
+
+You can enter these number either hexadecimal (leading `0x') or decimal
+(0x100 = 256). You can also use value + 512 to achieve compatibility
+with your old number passed to vesafb.
+
+Non-listed number can be achieved by more complicated command-line, for
+example 1600x1200x32bpp can be specified by `video=matroxfb:vesa:0x11C,depth:32'.
+
+
+X11
+===
+
+XF{68,86}_FBDev should work just fine, but it is non-accelerated. On non-intel
+architectures there are some glitches for 24bpp videomodes. 8, 16 and 32bpp
+works fine.
+
+Running another (accelerated) X-Server like XF86_SVGA works too. But (at least)
+XFree servers have big troubles in multihead configurations (even on first
+head, not even talking about second). Running XFree86 4.x accelerated mga
+driver is possible, but you must not enable DRI - if you do, resolution and
+color depth of your X desktop must match resolution and color depths of your
+virtual consoles, otherwise X will corrupt accelerator settings.
+
+
+SVGALib
+=======
+
+Driver contains SVGALib compatibility code. It is turned on by choosing textual
+mode for console. You can do it at boot time by using videomode
+2,3,7,0x108-0x10C or 0x1C0. At runtime, `fbset -depth 0' does this work.
+Unfortunately, after SVGALib application exits, screen contents is corrupted.
+Switching to another console and back fixes it. I hope that it is SVGALib's
+problem and not mine, but I'm not sure.
+
+
+Configuration
+=============
+
+You can pass kernel command line options to matroxfb with
+`video=matroxfb:option1,option2:value2,option3' (multiple options should be
+separated by comma, values are separated from options by `:').
+Accepted options:
+
+mem:X - size of memory (X can be in megabytes, kilobytes or bytes)
+ You can only decrease value determined by driver because of
+ it always probe for memory. Default is to use whole detected
+ memory usable for on-screen display (i.e. max. 8 MB).
+disabled - do not load driver; you can use also `off', but `disabled'
+ is here too.
+enabled - load driver, if you have `video=matroxfb:disabled' in LILO
+ configuration, you can override it by this (you cannot override
+ `off'). It is default.
+noaccel - do not use acceleration engine. It does not work on Alphas.
+accel - use acceleration engine. It is default.
+nopan - create initial consoles with vyres = yres, thus disabling virtual
+ scrolling.
+pan - create initial consoles as tall as possible (vyres = memory/vxres).
+ It is default.
+nopciretry - disable PCI retries. It is needed for some broken chipsets,
+ it is autodetected for intel's 82437. In this case device does
+ not comply to PCI 2.1 specs (it will not guarantee that every
+ transaction terminate with success or retry in 32 PCLK).
+pciretry - enable PCI retries. It is default, except for intel's 82437.
+novga - disables VGA I/O ports. It is default if BIOS did not enable device.
+ You should not use this option, some boards then do not restart
+ without power off.
+vga - preserve state of VGA I/O ports. It is default. Driver does not
+ enable VGA I/O if BIOS did not it (it is not safe to enable it in
+ most cases).
+nobios - disables BIOS ROM. It is default if BIOS did not enable BIOS itself.
+ You should not use this option, some boards then do not restart
+ without power off.
+bios - preserve state of BIOS ROM. It is default. Driver does not enable
+ BIOS if BIOS was not enabled before.
+noinit - tells driver, that devices were already initialized. You should use
+ it if you have G100 and/or if driver cannot detect memory, you see
+ strange pattern on screen and so on. Devices not enabled by BIOS
+ are still initialized. It is default.
+init - driver initializes every device it knows about.
+memtype - specifies memory type, implies 'init'. This is valid only for G200
+ and G400 and has following meaning:
+ G200: 0 -> 2x128Kx32 chips, 2MB onboard, probably sgram
+ 1 -> 2x128Kx32 chips, 4MB onboard, probably sgram
+ 2 -> 2x256Kx32 chips, 4MB onboard, probably sgram
+ 3 -> 2x256Kx32 chips, 8MB onboard, probably sgram
+ 4 -> 2x512Kx16 chips, 8/16MB onboard, probably sdram only
+ 5 -> same as above
+ 6 -> 4x128Kx32 chips, 4MB onboard, probably sgram
+ 7 -> 4x128Kx32 chips, 8MB onboard, probably sgram
+ G400: 0 -> 2x512Kx16 SDRAM, 16/32MB
+ 2x512Kx32 SGRAM, 16/32MB
+ 1 -> 2x256Kx32 SGRAM, 8/16MB
+ 2 -> 4x128Kx32 SGRAM, 8/16MB
+ 3 -> 4x512Kx32 SDRAM, 32MB
+ 4 -> 4x256Kx32 SGRAM, 16/32MB
+ 5 -> 2x1Mx32 SDRAM, 32MB
+ 6 -> reserved
+ 7 -> reserved
+ You should use sdram or sgram parameter in addition to memtype
+ parameter.
+nomtrr - disables write combining on frame buffer. This slows down driver but
+ there is reported minor incompatibility between GUS DMA and XFree
+ under high loads if write combining is enabled (sound dropouts).
+mtrr - enables write combining on frame buffer. It speeds up video accesses
+ much. It is default. You must have MTRR support enabled in kernel
+ and your CPU must have MTRR (f.e. Pentium II have them).
+sgram - tells to driver that you have Gxx0 with SGRAM memory. It has no
+ effect without `init'.
+sdram - tells to driver that you have Gxx0 with SDRAM memory.
+ It is a default.
+inv24 - change timings parameters for 24bpp modes on Millenium and
+ Millenium II. Specify this if you see strange color shadows around
+ characters.
+noinv24 - use standard timings. It is the default.
+inverse - invert colors on screen (for LCD displays)
+noinverse - show true colors on screen. It is default.
+dev:X - bind driver to device X. Driver numbers device from 0 up to N,
+ where device 0 is first `known' device found, 1 second and so on.
+ lspci lists devices in this order.
+ Default is `every' known device for driver with multihead support
+ and first working device (usually dev:0) for driver without
+ multihead support.
+nohwcursor - disables hardware cursor (use software cursor instead).
+hwcursor - enables hardware cursor. It is default. If you are using
+ non-accelerated mode (`noaccel' or `fbset -accel false'), software
+ cursor is used (except for text mode).
+noblink - disables cursor blinking. Cursor in text mode always blinks (hw
+ limitation).
+blink - enables cursor blinking. It is default.
+nofastfont - disables fastfont feature. It is default.
+fastfont:X - enables fastfont feature. X specifies size of memory reserved for
+ font data, it must be >= (fontwidth*fontheight*chars_in_font)/8.
+ It is faster on Gx00 series, but slower on older cards.
+grayscale - enable grayscale summing. It works in PSEUDOCOLOR modes (text,
+ 4bpp, 8bpp). In DIRECTCOLOR modes it is limited to characters
+ displayed through putc/putcs. Direct accesses to framebuffer
+ can paint colors.
+nograyscale - disable grayscale summing. It is default.
+cross4MB - enables that pixel line can cross 4MB boundary. It is default for
+ non-Millenium.
+nocross4MB - pixel line must not cross 4MB boundary. It is default for
+ Millenium I or II, because of these devices have hardware
+ limitations which do not allow this. But this option is
+ incompatible with some (if not all yet released) versions of
+ XF86_FBDev.
+dfp - enables digital flat panel interface. This option is incompatible with
+ secondary (TV) output - if DFP is active, TV output must be
+ inactive and vice versa. DFP always uses same timing as primary
+ (monitor) output.
+dfp:X - use settings X for digital flat panel interface. X is number from
+ 0 to 0xFF, and meaning of each individual bit is described in
+ G400 manual, in description of DAC register 0x1F. For normal operation
+ you should set all bits to zero, except lowest bit. This lowest bit
+ selects who is source of display clocks, whether G400, or panel.
+ Default value is now read back from hardware - so you should specify
+ this value only if you are also using `init' parameter.
+outputs:XYZ - set mapping between CRTC and outputs. Each letter can have value
+ of 0 (for no CRTC), 1 (CRTC1) or 2 (CRTC2), and first letter corresponds
+ to primary analog output, second letter to the secondary analog output
+ and third letter to the DVI output. Default setting is 100 for
+ cards below G400 or G400 without DFP, 101 for G400 with DFP, and
+ 111 for G450 and G550. You can set mapping only on first card,
+ use matroxset for setting up other devices.
+vesa:X - selects startup videomode. X is number from 0 to 0x1FF, see table
+ above for detailed explanation. Default is 640x480x8bpp if driver
+ has 8bpp support. Otherwise first available of 640x350x4bpp,
+ 640x480x15bpp, 640x480x24bpp, 640x480x32bpp or 80x25 text
+ (80x25 text is always available).
+
+If you are not satisfied with videomode selected by `vesa' option, you
+can modify it with these options:
+
+xres:X - horizontal resolution, in pixels. Default is derived from `vesa'
+ option.
+yres:X - vertical resolution, in pixel lines. Default is derived from `vesa'
+ option.
+upper:X - top boundary: lines between end of VSYNC pulse and start of first
+ pixel line of picture. Default is derived from `vesa' option.
+lower:X - bottom boundary: lines between end of picture and start of VSYNC
+ pulse. Default is derived from `vesa' option.
+vslen:X - length of VSYNC pulse, in lines. Default is derived from `vesa'
+ option.
+left:X - left boundary: pixels between end of HSYNC pulse and first pixel.
+ Default is derived from `vesa' option.
+right:X - right boundary: pixels between end of picture and start of HSYNC
+ pulse. Default is derived from `vesa' option.
+hslen:X - length of HSYNC pulse, in pixels. Default is derived from `vesa'
+ option.
+pixclock:X - dotclocks, in ps (picoseconds). Default is derived from `vesa'
+ option and from `fh' and `fv' options.
+sync:X - sync. pulse - bit 0 inverts HSYNC polarity, bit 1 VSYNC polarity.
+ If bit 3 (value 0x08) is set, composite sync instead of HSYNC is
+ generated. If bit 5 (value 0x20) is set, sync on green is turned on.
+ Do not forget that if you want sync on green, you also probably
+ want composite sync.
+ Default depends on `vesa'.
+depth:X - Bits per pixel: 0=text, 4,8,15,16,24 or 32. Default depends on
+ `vesa'.
+
+If you know capabilities of your monitor, you can specify some (or all) of
+`maxclk', `fh' and `fv'. In this case, `pixclock' is computed so that
+pixclock <= maxclk, real_fh <= fh and real_fv <= fv.
+
+maxclk:X - maximum dotclock. X can be specified in MHz, kHz or Hz. Default is
+ `don't care'.
+fh:X - maximum horizontal synchronization frequency. X can be specified
+ in kHz or Hz. Default is `don't care'.
+fv:X - maximum vertical frequency. X must be specified in Hz. Default is
+ 70 for modes derived from `vesa' with yres <= 400, 60Hz for
+ yres > 400.
+
+
+Limitations
+===========
+
+There are known and unknown bugs, features and misfeatures.
+Currently there are following known bugs:
+ + SVGALib does not restore screen on exit
+ + generic fbcon-cfbX procedures do not work on Alphas. Due to this,
+ `noaccel' (and cfb4 accel) driver does not work on Alpha. So everyone
+ with access to /dev/fb* on Alpha can hang machine (you should restrict
+ access to /dev/fb* - everyone with access to this device can destroy
+ your monitor, believe me...).
+ + 24bpp does not support correctly XF-FBDev on big-endian architectures.
+ + interlaced text mode is not supported; it looks like hardware limitation,
+ but I'm not sure.
+ + Gxx0 SGRAM/SDRAM is not autodetected.
+ + If you are using more than one framebuffer device, you must boot kernel
+ with 'video=scrollback:0'.
+ + maybe more...
+And following misfeatures:
+ + SVGALib does not restore screen on exit.
+ + pixclock for text modes is limited by hardware to
+ 83 MHz on G200
+ 66 MHz on Millennium I
+ 60 MHz on Millennium II
+ Because I have no access to other devices, I do not know specific
+ frequencies for them. So driver does not check this and allows you to
+ set frequency higher that this. It causes sparks, black holes and other
+ pretty effects on screen. Device was not destroyed during tests. :-)
+ + my Millennium G200 oscillator has frequency range from 35 MHz to 380 MHz
+ (and it works with 8bpp on about 320 MHz dotclocks (and changed mclk)).
+ But Matrox says on product sheet that VCO limit is 50-250 MHz, so I believe
+ them (maybe that chip overheats, but it has a very big cooler (G100 has
+ none), so it should work).
+ + special mixed video/graphics videomodes of Mystique and Gx00 - 2G8V16 and
+ G16V16 are not supported
+ + color keying is not supported
+ + feature connector of Mystique and Gx00 is set to VGA mode (it is disabled
+ by BIOS)
+ + DDC (monitor detection) is supported through dualhead driver
+ + some check for input values are not so strict how it should be (you can
+ specify vslen=4000 and so on).
+ + maybe more...
+And following features:
+ + 4bpp is available only on Millennium I and Millennium II. It is hardware
+ limitation.
+ + selection between 1:5:5:5 and 5:6:5 16bpp videomode is done by -rgba
+ option of fbset: "fbset -depth 16 -rgba 5,5,5" selects 1:5:5:5, anything
+ else selects 5:6:5 mode.
+ + text mode uses 6 bit VGA palette instead of 8 bit (one of 262144 colors
+ instead of one of 16M colors). It is due to hardware limitation of
+ Millennium I/II and SVGALib compatibility.
+
+
+Benchmarks
+==========
+It is time to redraw whole screen 1000 times in 1024x768, 60Hz. It is
+time for draw 6144000 characters on screen through /dev/vcsa
+(for 32bpp it is about 3GB of data (exactly 3000 MB); for 8x16 font in
+16 seconds, i.e. 187 MBps).
+Times were obtained from one older version of driver, now they are about 3%
+faster, it is kernel-space only time on P-II/350 MHz, Millennium I in 33 MHz
+PCI slot, G200 in AGP 2x slot. I did not test vgacon.
+
+NOACCEL
+ 8x16 12x22
+ Millennium I G200 Millennium I G200
+8bpp 16.42 9.54 12.33 9.13
+16bpp 21.00 15.70 19.11 15.02
+24bpp 36.66 36.66 35.00 35.00
+32bpp 35.00 30.00 33.85 28.66
+
+ACCEL, nofastfont
+ 8x16 12x22 6x11
+ Millennium I G200 Millennium I G200 Millennium I G200
+8bpp 7.79 7.24 13.55 7.78 30.00 21.01
+16bpp 9.13 7.78 16.16 7.78 30.00 21.01
+24bpp 14.17 10.72 18.69 10.24 34.99 21.01
+32bpp 16.15 16.16 18.73 13.09 34.99 21.01
+
+ACCEL, fastfont
+ 8x16 12x22 6x11
+ Millennium I G200 Millennium I G200 Millennium I G200
+8bpp 8.41 6.01 6.54 4.37 16.00 10.51
+16bpp 9.54 9.12 8.76 6.17 17.52 14.01
+24bpp 15.00 12.36 11.67 10.00 22.01 18.32
+32bpp 16.18 18.29* 12.71 12.74 24.44 21.00
+
+TEXT
+ 8x16
+ Millennium I G200
+TEXT 3.29 1.50
+
+* Yes, it is slower than Millennium I.
+
+
+Dualhead G400
+=============
+Driver supports dualhead G400 with some limitations:
+ + secondary head shares videomemory with primary head. It is not problem
+ if you have 32MB of videoram, but if you have only 16MB, you may have
+ to think twice before choosing videomode (for example twice 1880x1440x32bpp
+ is not possible).
+ + due to hardware limitation, secondary head can use only 16 and 32bpp
+ videomodes.
+ + secondary head is not accelerated. There were bad problems with accelerated
+ XFree when secondary head used to use acceleration.
+ + secondary head always powerups in 640x480@60-32 videomode. You have to use
+ fbset to change this mode.
+ + secondary head always powerups in monitor mode. You have to use fbmatroxset
+ to change it to TV mode. Also, you must select at least 525 lines for
+ NTSC output and 625 lines for PAL output.
+ + kernel is not fully multihead ready. So some things are impossible to do.
+ + if you compiled it as module, you must insert i2c-matroxfb, matroxfb_maven
+ and matroxfb_crtc2 into kernel.
+
+
+Dualhead G450
+=============
+Driver supports dualhead G450 with some limitations:
+ + secondary head shares videomemory with primary head. It is not problem
+ if you have 32MB of videoram, but if you have only 16MB, you may have
+ to think twice before choosing videomode.
+ + due to hardware limitation, secondary head can use only 16 and 32bpp
+ videomodes.
+ + secondary head is not accelerated.
+ + secondary head always powerups in 640x480@60-32 videomode. You have to use
+ fbset to change this mode.
+ + TV output is not supported
+ + kernel is not fully multihead ready, so some things are impossible to do.
+ + if you compiled it as module, you must insert matroxfb_g450 and matroxfb_crtc2
+ into kernel.
+
+--
+Petr Vandrovec <vandrove@vc.cvut.cz>
diff --git a/Documentation/fb/modedb.txt b/Documentation/fb/modedb.txt
new file mode 100644
index 000000000000..e04458b319d5
--- /dev/null
+++ b/Documentation/fb/modedb.txt
@@ -0,0 +1,61 @@
+
+
+ modedb default video mode support
+
+
+Currently all frame buffer device drivers have their own video mode databases,
+which is a mess and a waste of resources. The main idea of modedb is to have
+
+ - one routine to probe for video modes, which can be used by all frame buffer
+ devices
+ - one generic video mode database with a fair amount of standard videomodes
+ (taken from XFree86)
+ - the possibility to supply your own mode database for graphics hardware that
+ needs non-standard modes, like amifb and Mac frame buffer drivers (which
+ use macmodes.c)
+
+When a frame buffer device receives a video= option it doesn't know, it should
+consider that to be a video mode option. If no frame buffer device is specified
+in a video= option, fbmem considers that to be a global video mode option.
+
+Valid mode specifiers (mode_option argument):
+
+ <xres>x<yres>[-<bpp>][@<refresh>]
+ <name>[-<bpp>][@<refresh>]
+
+with <xres>, <yres>, <bpp> and <refresh> decimal numbers and <name> a string.
+Things between square brackets are optional.
+
+To find a suitable video mode, you just call
+
+int __init fb_find_mode(struct fb_var_screeninfo *var,
+ struct fb_info *info, const char *mode_option,
+ const struct fb_videomode *db, unsigned int dbsize,
+ const struct fb_videomode *default_mode,
+ unsigned int default_bpp)
+
+with db/dbsize your non-standard video mode database, or NULL to use the
+standard video mode database.
+
+fb_find_mode() first tries the specified video mode (or any mode that matches,
+e.g. there can be multiple 640x480 modes, each of them is tried). If that
+fails, the default mode is tried. If that fails, it walks over all modes.
+
+To specify a video mode at bootup, use the following boot options:
+ video=<driver>:<xres>x<yres>[-<bpp>][@refresh]
+
+where <driver> is a name from the table below. Valid default modes can be
+found in linux/drivers/video/modedb.c. Check your driver's documentation.
+There may be more modes.
+
+ Drivers that support modedb boot options
+ Boot Name Cards Supported
+
+ amifb - Amiga chipset frame buffer
+ aty128fb - ATI Rage128 / Pro frame buffer
+ atyfb - ATI Mach64 frame buffer
+ tdfxfb - 3D Fx frame buffer
+ tridentfb - Trident (Cyber)blade chipset frame buffer
+
+BTW, only a few drivers use this at the moment. Others are to follow
+(feel free to send patches).
diff --git a/Documentation/fb/pvr2fb.txt b/Documentation/fb/pvr2fb.txt
new file mode 100644
index 000000000000..2bf6c2321c2d
--- /dev/null
+++ b/Documentation/fb/pvr2fb.txt
@@ -0,0 +1,61 @@
+$Id: pvr2fb.txt,v 1.1 2001/05/24 05:09:16 mrbrown Exp $
+
+What is pvr2fb?
+===============
+
+This is a driver for PowerVR 2 based graphics frame buffers, such as the
+one found in the Dreamcast.
+
+Advantages:
+
+ * It provides a nice large console (128 cols + 48 lines with 1024x768)
+ without using tiny, unreadable fonts.
+ * You can run XF86_FBDev on top of /dev/fb0
+ * Most important: boot logo :-)
+
+Disadvantages:
+
+ * Driver is currently limited to the Dreamcast PowerVR 2 implementation
+ at the time of this writing.
+
+Configuration
+=============
+
+You can pass kernel command line options to pvr2fb with
+`video=pvr2fb:option1,option2:value2,option3' (multiple options should be
+separated by comma, values are separated from options by `:').
+Accepted options:
+
+font:X - default font to use. All fonts are supported, including the
+ SUN12x22 font which is very nice at high resolutions.
+
+mode:X - default video mode. The following video modes are supported:
+ 640x240-60, 640x480-60.
+
+ Note: the 640x240 mode is currently broken, and should not be
+ used for any reason. It is only mentioned as a reference.
+
+inverse - invert colors on screen (for LCD displays)
+
+nomtrr - disables write combining on frame buffer. This slows down driver
+ but there is reported minor incompatibility between GUS DMA and
+ XFree under high loads if write combining is enabled (sound
+ dropouts). MTRR is enabled by default on systems that have it
+ configured and that support it.
+
+cable:X - cable type. This can be any of the following: vga, rgb, and
+ composite. If none is specified, we guess.
+
+output:X - output type. This can be any of the following: pal, ntsc, and
+ vga. If none is specified, we guess.
+
+X11
+===
+
+XF86_FBDev should work, in theory. At the time of this writing it is
+totally untested and may or may not even portray the beginnings of
+working. If you end up testing this, please let me know!
+
+--
+Paul Mundt <lethal@linuxdc.org>
+
diff --git a/Documentation/fb/pxafb.txt b/Documentation/fb/pxafb.txt
new file mode 100644
index 000000000000..db9b8500b43b
--- /dev/null
+++ b/Documentation/fb/pxafb.txt
@@ -0,0 +1,54 @@
+Driver for PXA25x LCD controller
+================================
+
+The driver supports the following options, either via
+options=<OPTIONS> when modular or video=pxafb:<OPTIONS> when built in.
+
+For example:
+ modprobe pxafb options=mode:640x480-8,passive
+or on the kernel command line
+ video=pxafb:mode:640x480-8,passive
+
+mode:XRESxYRES[-BPP]
+ XRES == LCCR1_PPL + 1
+ YRES == LLCR2_LPP + 1
+ The resolution of the display in pixels
+ BPP == The bit depth. Valid values are 1, 2, 4, 8 and 16.
+
+pixclock:PIXCLOCK
+ Pixel clock in picoseconds
+
+left:LEFT == LCCR1_BLW + 1
+right:RIGHT == LCCR1_ELW + 1
+hsynclen:HSYNC == LCCR1_HSW + 1
+upper:UPPER == LCCR2_BFW
+lower:LOWER == LCCR2_EFR
+vsynclen:VSYNC == LCCR2_VSW + 1
+ Display margins and sync times
+
+color | mono => LCCR0_CMS
+ umm...
+
+active | passive => LCCR0_PAS
+ Active (TFT) or Passive (STN) display
+
+single | dual => LCCR0_SDS
+ Single or dual panel passive display
+
+4pix | 8pix => LCCR0_DPD
+ 4 or 8 pixel monochrome single panel data
+
+hsync:HSYNC
+vsync:VSYNC
+ Horizontal and vertical sync. 0 => active low, 1 => active
+ high.
+
+dpc:DPC
+ Double pixel clock. 1=>true, 0=>false
+
+outputen:POLARITY
+ Output Enable Polarity. 0 => active low, 1 => active high
+
+pixclockpol:POLARITY
+ pixel clock polarity
+ 0 => falling edge, 1 => rising edge
diff --git a/Documentation/fb/sa1100fb.txt b/Documentation/fb/sa1100fb.txt
new file mode 100644
index 000000000000..f1b4220464df
--- /dev/null
+++ b/Documentation/fb/sa1100fb.txt
@@ -0,0 +1,39 @@
+[This file is cloned from VesaFB/matroxfb]
+
+What is sa1100fb?
+=================
+
+This is a driver for a graphic framebuffer for the SA-1100 LCD
+controller.
+
+Configuration
+==============
+
+For most common passive displays, giving the option
+
+video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
+
+on the kernel command line should be enough to configure the
+controller. The bits per pixel (bpp) value should be 4, 8, 12, or
+16. LCCR values are display-specific and should be computed as
+documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel
+displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2>
+are used for the lower panel.
+
+For active displays or displays requiring additional configuration
+(controlling backlights, powering on the LCD, etc.), the command line
+options may not be enough to configure the display. Adding sections to
+sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
+sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
+will probably be necessary.
+
+Accepted options:
+
+bpp:<value> Configure for <value> bits per pixel
+lccr0:<value> Configure LCD control register 0 (11.7.3)
+lccr1:<value> Configure LCD control register 1 (11.7.4)
+lccr2:<value> Configure LCD control register 2 (11.7.5)
+lccr3:<value> Configure LCD control register 3 (11.7.6)
+
+--
+Mark Huang <mhuang@livetoy.com>
diff --git a/Documentation/fb/sisfb.txt b/Documentation/fb/sisfb.txt
new file mode 100644
index 000000000000..3b50c517a08d
--- /dev/null
+++ b/Documentation/fb/sisfb.txt
@@ -0,0 +1,158 @@
+
+What is sisfb?
+==============
+
+sisfb is a framebuffer device driver for SiS (Silicon Integrated Systems)
+graphics chips. Supported are:
+
+- SiS 300 series: SiS 300/305, 540, 630(S), 730(S)
+- SiS 315 series: SiS 315/H/PRO, 55x, (M)65x, 740, (M)661(F/M)X, (M)741(GX)
+- SiS 330 series: SiS 330 ("Xabre"), (M)760
+
+
+Why do I need a framebuffer driver?
+===================================
+
+sisfb is eg. useful if you want a high-resolution text console. Besides that,
+sisfb is required to run DirectFB (which comes with an additional, dedicated
+driver for the 315 series).
+
+On the 300 series, sisfb on kernels older than 2.6.3 furthermore plays an
+important role in connection with DRM/DRI: Sisfb manages the memory heap
+used by DRM/DRI for 3D texture and other data. This memory management is
+required for using DRI/DRM.
+
+Kernels >= around 2.6.3 do not need sisfb any longer for DRI/DRM memory
+management. The SiS DRM driver has been updated and features a memory manager
+of its own (which will be used if sisfb is not compiled). So unless you want
+a graphical console, you don't need sisfb on kernels >=2.6.3.
+
+Sidenote: Since this seems to be a commonly made mistake: sisfb and vesafb
+cannot be active at the same time! Do only select one of them in your kernel
+configuration.
+
+
+How are parameters passed to sisfb?
+===================================
+
+Well, it depends: If compiled statically into the kernel, use lilo's append
+statement to add the parameters to the kernel command line. Please see lilo's
+(or GRUB's) documentation for more information. If sisfb is a kernel module,
+parameters are given with the modprobe (or insmod) command.
+
+Example for sisfb as part of the static kernel: Add the following line to your
+lilo.conf:
+
+ append="video=sisfb:mode:1024x768x16,mem:12288,rate:75"
+
+Example for sisfb as a module: Start sisfb by typing
+
+ modprobe sisfb mode=1024x768x16 rate=75 mem=12288
+
+A common mistake is that folks use a wrong parameter format when using the
+driver compiled into the kernel. Please note: If compiled into the kernel,
+the parameter format is video=sisfb:mode:none or video=sisfb:mode:1024x768x16
+(or whatever mode you want to use, alternatively using any other format
+described above or the vesa keyword instead of mode). If compiled as a module,
+the parameter format reads mode=none or mode=1024x768x16 (or whatever mode you
+want to use). Using a "=" for a ":" (and vice versa) is a huge difference!
+Additionally: If you give more than one argument to the in-kernel sisfb, the
+arguments are separated with ",". For example:
+
+ video=sisfb:mode:1024x768x16,rate:75,mem:12288
+
+
+How do I use it?
+================
+
+Preface statement: This file only covers very little of the driver's
+capabilities and features. Please refer to the author's and maintainer's
+website at http://www.winischhofer.net/linuxsisvga.shtml for more
+information. Additionally, "modinfo sisfb" gives an overview over all
+supported options including some explanation.
+
+The desired display mode can be specified using the keyword "mode" with
+a parameter in one of the follwing formats:
+ - XxYxDepth or
+ - XxY-Depth or
+ - XxY-Depth@Rate or
+ - XxY
+ - or simply use the VESA mode number in hexadecimal or decimal.
+
+For example: 1024x768x16, 1024x768-16@75, 1280x1024-16. If no depth is
+specified, it defaults to 8. If no rate is given, it defaults to 60Hz. Depth 32
+means 24bit color depth (but 32 bit framebuffer depth, which is not relevant
+to the user).
+
+Additionally, sisfb understands the keyword "vesa" followed by a VESA mode
+number in decimal or hexadecimal. For example: vesa=791 or vesa=0x117. Please
+use either "mode" or "vesa" but not both.
+
+Linux 2.4 only: If no mode is given, sisfb defaults to "no mode" (mode=none) if
+compiled as a module; if sisfb is statically compiled into the kernel, it
+defaults to 800x600x8 unless CRT2 type is LCD, in which case the LCD's native
+resolution is used. If you want to switch to a different mode, use the fbset
+shell command.
+
+Linux 2.6 only: If no mode is given, sisfb defaults to 800x600x8 unless CRT2
+type is LCD, in which case it defaults to the LCD's native resolution. If
+you want to switch to another mode, use the stty shell command.
+
+You should compile in both vgacon (to boot if you remove you SiS card from
+your system) and sisfb (for graphics mode). Under Linux 2.6, also "Framebuffer
+console support" (fbcon) is needed for a graphical console.
+
+You should *not* compile-in vesafb. And please do not use the "vga=" keyword
+in lilo's or grub's configuration file; mode selection is done using the
+"mode" or "vesa" keywords as a parameter. See above and below.
+
+
+X11
+===
+
+If using XFree86 or X.org, it is recommended that you don't use the "fbdev"
+driver but the dedicated "sis" X driver. The "sis" X driver and sisfb are
+developed by the same person (Thomas Winischhofer) and cooperate well with
+each other.
+
+
+SVGALib
+=======
+
+SVGALib, if directly accessing the hardware, never restores the screen
+correctly, especially on laptops or if the output devices are LCD or TV.
+Therefore, use the chipset "FBDEV" in SVGALib configuration. This will make
+SVGALib use the framebuffer device for mode switches and restoration.
+
+
+Configuration
+=============
+
+(Some) accepted options:
+
+off - Disable sisfb. This option is only understood if sisfb is
+ in-kernel, not a module.
+mem:X - size of memory for the console, rest will be used for DRI/DRM. X
+ is in kilobytes. On 300 series, the default is 4096, 8192 or
+ 16384 (each in kilobyte) depending on how much video ram the card
+ has. On 315/330 series, the default is the maximum available ram
+ (since DRI/DRM is not supported for these chipsets).
+noaccel - do not use 2D acceleration engine. (Default: use acceleration)
+noypan - disable y-panning and scroll by redrawing the entire screen.
+ This is much slower than y-panning. (Default: use y-panning)
+vesa:X - selects startup videomode. X is number from 0 to 0x1FF and
+ represents the VESA mode number (can be given in decimal or
+ hexadecimal form, the latter prefixed with "0x").
+mode:X - selects startup videomode. Please see above for the format of
+ "X".
+
+Boolean options such as "noaccel" or "noypan" are to be given without a
+parameter if sisfb is in-kernel (for example "video=sisfb:noypan). If
+sisfb is a module, these are to be set to 1 (for example "modprobe sisfb
+noypan=1").
+
+--
+Thomas Winischhofer <thomas@winischhofer.net>
+May 27, 2004
+
+
diff --git a/Documentation/fb/sstfb.txt b/Documentation/fb/sstfb.txt
new file mode 100644
index 000000000000..628d7ffa8769
--- /dev/null
+++ b/Documentation/fb/sstfb.txt
@@ -0,0 +1,174 @@
+
+Introduction
+
+ This is a frame buffer device driver for 3dfx' Voodoo Graphics
+ (aka voodoo 1, aka sst1) and VoodooČ (aka Voodoo 2, aka CVG) based
+ video boards. It's highly experimental code, but is guaranteed to work
+ on my computer, with my "Maxi Gamer 3D" and "Maxi Gamer 3dČ" boards,
+ and with me "between chair and keyboard". Some people tested other
+ combinations and it seems that it works.
+ The main page is located at <http://sstfb.sourceforge.net>, and if
+ you want the latest version, check out the CVS, as the driver is a work
+ in progress, I feel uncomfortable with releasing tarballs of something
+ not completely working...Don't worry, it's still more than useable
+ (I eat my own dog food)
+
+ Please read the Bug section, and report any success or failure to me
+ (Ghozlane Toumi <gtoumi@laposte.net>).
+ BTW, If you have only one monitor , and you don't feel like playing
+ with the vga passthrou cable, I can only suggest borrowing a screen
+ somewhere...
+
+
+Installation
+
+ This driver (should) work on ix86, with "late" 2.2.x kernel (tested
+ with x = 19) and "recent" 2.4.x kernel, as a module or compiled in.
+ It has been included in mainstream kernel since the infamous 2.4.10.
+ You can apply the patches found in sstfb/kernel/*-2.{2|4}.x.patch,
+ and copy sstfb.c to linux/drivers/video/, or apply a single patch,
+ sstfb/patch-2.{2|4}.x-sstfb-yymmdd to your linux source tree.
+
+ Then configure your kernel as usual: choose "m" or "y" to 3Dfx Voodoo
+ Graphics in section "console". Compile, install, have fun... and please
+ drop me a report :)
+
+
+Module Usage
+
+ Warnings.
+ # You should read completely this section before issuing any command.
+ # If you have only one monitor to play with, once you insmod the
+ module, the 3dfx takes control of the output, so you'll have to
+ plug the monitor to the "normal" video board in order to issue
+ the commands, or you can blindly use sst_dbg_vgapass
+ in the tools directory (See Tools). The latest solution is pass the
+ parameter vgapass=1 when insmodding the driver. (See Kernel/Modules
+ Options)
+
+ Module insertion:
+ # insmod sstfb.o
+ you should see some strange output frome the board:
+ a big blue square, a green and a red small squares and a vertical
+ white rectangle. why ? the function's name is self explanatory :
+ "sstfb_test()"...
+ (if you don't have a second monitor, you'll have to plug your monitor
+ directely to the 2D videocard to see what you're typing)
+ # con2fb /dev/fbx /dev/ttyx
+ bind a tty to the new frame buffer. if you already have a frame
+ buffer driver, the voodoo fb will likely be /dev/fb1. if not,
+ the device will be /dev/fb0. You can check this by doing a
+ cat /proc/fb. You can find a copy of con2fb in tools/ directory.
+ if you don't have another fb device, this step is superfluous,
+ as the console subsystem automagicaly binds ttys to the fb.
+ # switch to the virtual console you just mapped. "tadaaa" ...
+
+ Module removal:
+ # con2fb /dev/fbx /dev/ttyx
+ bind the tty to the old frame buffer so the module can be removed.
+ (how does it work with vgacon ? short answer : it doesn't work)
+ # rmmod sstfb
+
+
+Kernel/Modules Options
+
+ You can pass some otions to sstfb module, and via the kernel command
+ line when the driver is compiled in :
+ for module : insmod sstfb.o option1=value1 option2=value2 ...
+ in kernel : video=sstfb:option1,option2:value2,option3 ...
+
+ sstfb supports the folowing options :
+
+Module Kernel Description
+
+vgapass=0 vganopass Enable or disable VGA passthrou cable.
+vgapass=1 vgapass When enabled, the monitor will get the signal
+ from the VGA board and not from the voodoo.
+ Default: nopass
+
+mem=x mem:x Force frame buffer memory in MiB
+ allowed values: 0, 1, 2, 4.
+ Default: 0 (= autodetect)
+
+inverse=1 inverse Supposed to enable inverse console.
+ doesn't work yet...
+
+clipping=1 clipping Enable or disable clipping.
+clipping=0 noclipping With clipping enabled, all offscreen
+ reads and writes are disgarded.
+ Default: enable clipping.
+
+gfxclk=x gfxclk:x Force graphic clock frequency (in MHz).
+ Be carefull with this option, it may be
+ DANGEROUS.
+ Default: auto
+ 50Mhz for Voodoo 1,
+ 75MHz for Voodoo 2.
+
+slowpci=1 fastpci Enable or disable fast PCI read/writes.
+slowpci=1 slowpci Default : fastpci
+
+dev=x dev:x Attach the driver to device number x.
+ 0 is the first compatible board (in
+ lspci order)
+
+Tools
+
+ These tools are mostly for debugging purposes, but you can
+ find some of these interesting :
+ - con2fb , maps a tty to a fbramebuffer .
+ con2fb /dev/fb1 /dev/tty5
+ - sst_dbg_vgapass , changes vga passthrou. You have to recompile the
+ driver with SST_DEBUG and SST_DEBUG_IOCTL set to 1
+ sst_dbg_vgapass /dev/fb1 1 (enables vga cable)
+ sst_dbg_vgapass /dev/fb1 0 (disables vga cable)
+ - glide_reset , resets the voodoo using glide
+ use this after rmmoding sstfb, if the module refuses to
+ reinsert .
+
+Bugs
+
+ - DO NOT use glide while the sstfb module is in, you'll most likely
+ hang your computer.
+ - If you see some artefacts (pixels not cleaning and stuff like that),
+ try turning off clipping (clipping=0), and/or using slowpci
+ - the driver don't detect the 4Mb frame buffer voodoos, it seems that
+ the 2 last Mbs wrap around. looking into that .
+ - The driver is 16 bpp only, 24/32 won't work.
+ - The driver is not your_favorite_toy-safe. this includes SMP...
+ [Actually from inspection it seems to be safe - Alan]
+ - when using XFree86 FBdev (X over fbdev) you may see strange color
+ patterns at the border of your windows (the pixels lose the lowest
+ byte -> basicaly the blue component nd some of the green) . I'm unable
+ to reproduce this with XFree86-3.3, but one of the testers has this
+ problem with XFree86-4. apparently recent Xfree86-4.x solve this
+ problem.
+ - I didn't really test changing the palette, so you may find some weird
+ things when playing with that.
+ - Sometimes the driver will not recognise the DAC , and the
+ initialisation will fail. this is specificaly true for
+ voodoo 2 boards , but it should be solved in recent versions. please
+ contact me .
+ - the 24/32 is not likely to work anytime soon , knowing that the
+ hardware does ... unusual thigs in 24/32 bpp
+ - When used with anther video board, current limitations of linux
+ console subsystem can cause some troubles, specificaly, you should
+ disable software scrollback , as it can oops badly ...
+
+Todo
+
+ - Get rid of the previous paragraph.
+ - Buy more coffee.
+ - test/port to other arch.
+ - try to add panning using tweeks with front and back buffer .
+ - try to implement accel on voodoo2 , this board can actualy do a
+ lot in 2D even if it was sold as a 3D only board ...
+
+ghoz.
+
+--
+Ghozlane Toumi <gtoumi@laposte.net>
+
+
+$Date: 2002/05/09 20:11:45 $
+http://sstfb.sourceforge.net/README
diff --git a/Documentation/fb/tgafb.txt b/Documentation/fb/tgafb.txt
new file mode 100644
index 000000000000..250083ada8fb
--- /dev/null
+++ b/Documentation/fb/tgafb.txt
@@ -0,0 +1,69 @@
+$Id: tgafb.txt,v 1.1.2.2 2000/04/04 06:50:18 mato Exp $
+
+What is tgafb?
+===============
+
+This is a driver for DECChip 21030 based graphics framebuffers, a.k.a. TGA
+cards, which are usually found in older Digital Alpha systems. The
+following models are supported:
+
+ZLxP-E1 (8bpp, 2 MB VRAM)
+ZLxP-E2 (32bpp, 8 MB VRAM)
+ZLxP-E3 (32bpp, 16 MB VRAM, Zbuffer)
+
+This version is an almost complete rewrite of the code written by Geert
+Uytterhoeven, which was based on the original TGA console code written by
+Jay Estabrook.
+
+Major new features since Linux 2.0.x:
+
+ * Support for multiple resolutions
+ * Support for fixed-frequency and other oddball monitors
+ (by allowing the video mode to be set at boot time)
+
+User-visible changes since Linux 2.2.x:
+
+ * Sync-on-green is now handled properly
+ * More useful information is printed on bootup
+ (this helps if people run into problems)
+
+This driver does not (yet) support the TGA2 family of framebuffers, so the
+PowerStorm 3D30/4D20 (also known as PBXGB) cards are not supported. These
+can however be used with the standard VGA Text Console driver.
+
+
+Configuration
+=============
+
+You can pass kernel command line options to tgafb with
+`video=tgafb:option1,option2:value2,option3' (multiple options should be
+separated by comma, values are separated from options by `:').
+Accepted options:
+
+font:X - default font to use. All fonts are supported, including the
+ SUN12x22 font which is very nice at high resolutions.
+
+mode:X - default video mode. The following video modes are supported:
+ 640x480-60, 800x600-56, 640x480-72, 800x600-60, 800x600-72,
+ 1024x768-60, 1152x864-60, 1024x768-70, 1024x768-76,
+ 1152x864-70, 1280x1024-61, 1024x768-85, 1280x1024-70,
+ 1152x864-84, 1280x1024-76, 1280x1024-85
+
+
+Known Issues
+============
+
+The XFree86 FBDev server has been reported not to work, since tgafb doesn't do
+mmap(). Running the standard XF86_TGA server from XFree86 3.3.x works fine for
+me, however this server does not do acceleration, which make certain operations
+quite slow. Support for acceleration is being progressively integrated in
+XFree86 4.x.
+
+When running tgafb in resolutions higher than 640x480, on switching VCs from
+tgafb to XF86_TGA 3.3.x, the entire screen is not re-drawn and must be manually
+refreshed. This is an X server problem, not a tgafb problem, and is fixed in
+XFree86 4.0.
+
+Enjoy!
+
+Martin Lucina <mato@kotelna.sk>
diff --git a/Documentation/fb/tridentfb.txt b/Documentation/fb/tridentfb.txt
new file mode 100644
index 000000000000..8a6c8a43e6a3
--- /dev/null
+++ b/Documentation/fb/tridentfb.txt
@@ -0,0 +1,54 @@
+Tridentfb is a framebuffer driver for some Trident chip based cards.
+
+The following list of chips is thought to be supported although not all are
+tested:
+
+those from the Image series with Cyber in their names - accelerated
+those with Blade in their names (Blade3D,CyberBlade...) - accelerated
+the newer CyberBladeXP family - nonaccelerated
+
+Only PCI/AGP based cards are supported, none of the older Tridents.
+
+How to use it?
+==============
+
+When booting you can pass the video parameter.
+video=tridentfb
+
+The parameters for tridentfb are concatenated with a ':' as in this example.
+
+video=tridentfb:800x600,bpp=16,noaccel
+
+The second level parameters that tridentfb understands are:
+
+noaccel - turns off acceleration (when it doesn't work for your card)
+accel - force text acceleration (for boards which by default are noacceled)
+
+fp - use flat panel related stuff
+crt - assume monitor is present instead of fp
+
+center - for flat panels and resolutions smaller than native size center the
+ image, otherwise use
+stretch
+
+memsize - integer value in Kb, use if your card's memory size is misdetected.
+ look at the driver output to see what it says when initializing.
+memdiff - integer value in Kb,should be nonzero if your card reports
+ more memory than it actually has.For instance mine is 192K less than
+ detection says in all three BIOS selectable situations 2M, 4M, 8M.
+ Only use if your video memory is taken from main memory hence of
+ configurable size.Otherwise use memsize.
+ If in some modes which barely fit the memory you see garbage at the bottom
+ this might help by not letting change to that mode anymore.
+
+nativex - the width in pixels of the flat panel.If you know it (usually 1024
+ 800 or 1280) and it is not what the driver seems to detect use it.
+
+bpp - bits per pixel (8,16 or 32)
+mode - a mode name like 800x600 (as described in Documentation/fb/modedb.txt)
+
+Using insane values for the above parameters will probably result in driver
+misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or
+nativex=93)
+
+Contact: jani@astechnix.ro
diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt
new file mode 100644
index 000000000000..814e2f56a6ad
--- /dev/null
+++ b/Documentation/fb/vesafb.txt
@@ -0,0 +1,167 @@
+
+What is vesafb?
+===============
+
+This is a generic driver for a graphic framebuffer on intel boxes.
+
+The idea is simple: Turn on graphics mode at boot time with the help
+of the BIOS, and use this as framebuffer device /dev/fb0, like the m68k
+(and other) ports do.
+
+This means we decide at boot time whenever we want to run in text or
+graphics mode. Switching mode later on (in protected mode) is
+impossible; BIOS calls work in real mode only. VESA BIOS Extensions
+Version 2.0 are required, because we need a linear frame buffer.
+
+Advantages:
+
+ * It provides a nice large console (128 cols + 48 lines with 1024x768)
+ without using tiny, unreadable fonts.
+ * You can run XF68_FBDev on top of /dev/fb0 (=> non-accelerated X11
+ support for every VBE 2.0 compliant graphics board).
+ * Most important: boot logo :-)
+
+Disadvantages:
+
+ * graphic mode is slower than text mode...
+
+
+How to use it?
+==============
+
+Switching modes is done using the vga=... boot parameter. Read
+Documentation/svga.txt for details.
+
+You should compile in both vgacon (for text mode) and vesafb (for
+graphics mode). Which of them takes over the console depends on
+whenever the specified mode is text or graphics.
+
+The graphic modes are NOT in the list which you get if you boot with
+vga=ask and hit return. The mode you wish to use is derived from the
+VESA mode number. Here are those VESA mode numbers:
+
+ | 640x480 800x600 1024x768 1280x1024
+----+-------------------------------------
+256 | 0x101 0x103 0x105 0x107
+32k | 0x110 0x113 0x116 0x119
+64k | 0x111 0x114 0x117 0x11A
+16M | 0x112 0x115 0x118 0x11B
+
+The video mode number of the Linux kernel is the VESA mode number plus
+0x200.
+
+ Linux_kernel_mode_number = VESA_mode_number + 0x200
+
+So the table for the Kernel mode numbers are:
+
+ | 640x480 800x600 1024x768 1280x1024
+----+-------------------------------------
+256 | 0x301 0x303 0x305 0x307
+32k | 0x310 0x313 0x316 0x319
+64k | 0x311 0x314 0x317 0x31A
+16M | 0x312 0x315 0x318 0x31B
+
+To enable one of those modes you have to specify "vga=ask" in the
+lilo.conf file and rerun LILO. Then you can type in the desired
+mode at the "vga=ask" prompt. For example if you like to use
+1024x768x256 colors you have to say "305" at this prompt.
+
+If this does not work, this might be because your BIOS does not support
+linear framebuffers or because it does not support this mode at all.
+Even if your board does, it might be the BIOS which does not. VESA BIOS
+Extensions v2.0 are required, 1.2 is NOT sufficient. You will get a
+"bad mode number" message if something goes wrong.
+
+1. Note: LILO cannot handle hex, for booting directly with
+ "vga=mode-number" you have to transform the numbers to decimal.
+2. Note: Some newer versions of LILO appear to work with those hex values,
+ if you set the 0x in front of the numbers.
+
+X11
+===
+
+XF68_FBDev should work just fine, but it is non-accelerated. Running
+another (accelerated) X-Server like XF86_SVGA might or might not work.
+It depends on X-Server and graphics board.
+
+The X-Server must restore the video mode correctly, else you end up
+with a broken console (and vesafb cannot do anything about this).
+
+
+Refresh rates
+=============
+
+There is no way to change the vesafb video mode and/or timings after
+booting linux. If you are not happy with the 60 Hz refresh rate, you
+have these options:
+
+ * configure and load the DOS-Tools for your the graphics board (if
+ available) and boot linux with loadlin.
+ * use a native driver (matroxfb/atyfb) instead if vesafb. If none
+ is available, write a new one!
+ * VBE 3.0 might work too. I have neither a gfx board with VBE 3.0
+ support nor the specs, so I have not checked this yet.
+
+
+Configuration
+=============
+
+The VESA BIOS provides protected mode interface for changing
+some parameters. vesafb can use it for palette changes and
+to pan the display. It is turned off by default because it
+seems not to work with some BIOS versions, but there are options
+to turn it on.
+
+You can pass options to vesafb using "video=vesafb:option" on
+the kernel command line. Multiple options should be separated
+by comma, like this: "video=vesafb:ypan,invers"
+
+Accepted options:
+
+invers no comment...
+
+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.
+ pro: * scrolling (fullscreen) is fast, because there is
+ no need to copy around data.
+ * You'll get scrollback (the Shift-PgUp thing),
+ the video memory can be used as scrollback buffer
+ kontra: * scrolling only parts of the screen causes some
+ ugly flicker effects (boot logo flickers for
+ example).
+
+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.
+
+redraw scroll by redrawing the affected part of the screen, this
+ is the safe (and slow) default.
+
+
+vgapal Use the standard vga registers for palette changes.
+ This is the default.
+pmipal Use the protected mode interface for palette changes.
+
+mtrr setup memory type range registers for the vesafb framebuffer.
+
+vremap:n
+ remap 'n' MiB of video RAM. If 0 or not specified, remap memory
+ according to video mode. (2.5.66 patch/idea by Antonino Daplas
+ reversed to give override possibility (allocate more fb memory
+ than the kernel would) to 2.4 by tmb@iki.fi)
+
+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).
+
+Have fun!
+
+ Gerd
+
+--
+Gerd Knorr <kraxel@goldbach.in-berlin.de>
+
+Minor (mostly typo) changes
+by Nico Schmoigl <schmoigl@rumms.uni-mannheim.de>