Framebuffer driver for Cirrus Logic chipsets

Copyright 1999 Jeff Garzik <>

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

  • mode:1024x768

Full support for startup video modes (modedb) will be integrated soon.


  • Fix memory detection for 512kB case

  • 800x600 mode

  • Fixed timings

  • Hint for AXP: Use -accel false -vyres -1 when changing resolution


  • 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 modelled after that in atyfb and matroxfb.

  • Code cleanup, add comments.

  • Overhaul SR07 handling.

  • Bug fixes.


  • 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.


  • Casting fixes.

  • Assertions no longer cause an oops on purpose.

  • Bug fixes.


  • 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.