View source for Hardware Drivers

{{Translations}}
==Video==

==Marvell Wireless Driver==

Is available in the GIT tree, but it would be '''great''' if it could be included in the next '''stream-image'''

==Mesh Networking==

Are you going to place the RoofTop network driver in the box to enable mesh networking?

==Audio==

Note: need to verify that the audio sensor stuff actually made it upstream and come up with a test plan.  Also need to document OLPC-specific bits.

==CAFE NAND Driver==

Is available in the GIT tree.

==DCON==

The DCON work has its own page: [[DCON]].

== Geode LX (B3+) ==

=== lxfb Framebuffer Driver ===

The Geode LX (lxfb) driver is used to provide graphical console support in the kernel.

=== Xorg Driver ===

The xf86-video-amd driver provides support for both the LX and the GX platforms.  The LX platform needs special settings in the ''xorg.conf'' file:

 Section "Device"
         Identifier "Geode"
         Driver "amd"
          
         # This option sets the amount of video memory to use 
         Option "FBSize" "8388608"
 
         # The following turns compression off - this allows the driver to use a linear pitch instead of a power of 2
         # Saving about 3MB of video memory for other uses 
         Option "NoCompression" "true"
 
         # The following sets the panel geometry - this is needed to tell the X driver the size of the DCON
         Option "PanelGeometry" "1200x900" 
 EndSection

{{deprecated|The following is for the <B2 boards}}

== GX ==

===FBDev Driver===

The Geode GX Framebuffer (gxfb) driver is used in both [[LinuxBIOS]] and in the kernel proper during bootup.  It provides simple unaccelerated framebuffer support and also helps drive the 
flatpanel.

Currently available in the [http://dev.laptop.org/git.do?p=olpc-2.6;a=summary olpc-2.6 GIT tree]

You can change the resolution of the framebuffer two ways:

* with the 'fbset' utility like so:
 fbset -g <xres> <yres> <xres> <yres> <depth> -n

* On the kernel command line:
  video=gxfb:<xres>-<yres>-<depth>@<refresh>

We have timings for all of the standard VESA modes, plus the special 1200x900 mode for the OLPC panel.  <strike>Don't use the 1200x900 mode on a CRT - you could damage your monitor, or at the
very least get a headache.</strike> 

I spoke too soon. These fbdev mode works well on my multi-sync monitor.  YMMV - use with caution, don't take internally, see your doctor if the symptoms don't go away, etc, etc.... [[User:JordanCrouse|JordanCrouse]] ([[User talk:JordanCrouse|Talk to me!]]) 14:57, 3 August 2006 (EDT)

 mode "1200x900-75"
    # D: 124.239 MHz, H: 73.952 kHz, V: 75.002 Hz
    geometry 1200 900 1200 900 16
    timings 8049 104 240 29 54 136 3
    rgba 5/11,6/5,5/0,0/0
 endmode

 mode "1200x900-85"
        # D: 132.767 MHz, H: 81.352 kHz, V: 85.008 Hz
        geometry 1200 900 1200 900 16
        timings 7532 216 88 41 13 128 3
        accel false
        rgba 5/11,6/5,5/0,0/0
 endmode

===X Video Driver===

The Geode GX/LX Xorg graphics driver is a Xorg driver that is under development.  It provides XAA support for the Geode GX and LX, and EXA support for the GX.  It also provides a simple
Xv driver for the GX.  It's packaged as <tt>xorg-x11-drv-amd</tt> in [[Fedora Core]], and also available on freedesktop.org:  [http://gitweb.freedesktop.org/?p=xorg/driver/xf86-video-amd.git;a=summary GIT tree].

The following is an example "Device" entry to enable the driver:

 Section "Device"
         Identifier "Geode"
         Driver "amd"
         
         # The following will enable the EXA driver.  Comment it to only use XAA
         Option "AccelMethod" "EXA"
 
         # This option disables VGA probing
         Option "NoVGA" "true"
  
         # The folloiwng tells the driver to use our custom mode (otherwise, it uses an internal table)
         # You will only want to use this if you have a DCON attached - the internal tables have most VESA modes
         Option "CustomMode" "true"
 
         # The following turns compression off - this allows the driver to use a linear pitch instead of a power of 2
         # Saving about 3MB of video memory for other uses 
         Option "NoCompression" "true"
 EndSection

The following modeline should match the correct OLPC panel timings:
 Mode "1200x900"
         DotClock 57.275
         HTimings 1200 1208 1216 1240
         VTimings 900 905 908 912
         Flags    " HSync" " VSync"
 EndMode

[[Category:hardware]]
[[Category:developers]]