Differences between revisions 8 and 9
⇤ ← Revision 8 as of 2009-12-16 14:56:05 →
Size: 8717
Editor: GeoffSimmons
Comment: Include firmware installation procedure for Debian kernels >= 2.6.31 (condensed from BTS #464197).
← Revision 9 as of 2009-12-30 04:25:10 → ⇥
Size: 6227
Editor: GeoffSimmons
Comment: Drop workaround for oldstable/2.6.24.
Deletions are marked like this. Additions are marked like this.
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## this won't build on 2.6.25 and later kernels due to Debian bug #490710
## also, alsa-source 1.0.13-5etch1 won't build on 2.6.24
The following procedure can be used to provide the snd-cs46xx module, using an DebianPkg:alsa-source package generated from a deprecated [[DebianPkg:src:alsa-driver|alsa-driver]] version. No firmware from userspace is required.		 {{{#!wiki comment
alsa-source 1.0.13-5etch1 will not build on 2.6.24.}}}
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 1. Install the DebianPkg:build-essential, DebianPkg:debconf-utils, DebianPkg:devscripts, DebianPkg:fakeroot, relevant linux-headers and DebianPkg:module-assistant packages: {{{
$ su
# aptitude update
# aptitude install build-essential debconf-utils devscripts fakeroot linux-headers-$(uname -r) module-assistant
}}}
 1. Add the [[Backports|Debian Backports]] repository to {{{/etc/apt/sources.list}}}, for example: {{{
# Backported packages for Debian Etch
deb http://www.backports.org/debian etch-backports main
}}}
 1. Update the list of available packages and install the DebianPkg:etch-backports/debian-backports-keyring package: {{{
# aptitude update
# aptitude -t etch-backports install debian-backports-keyring
}}}
 As your system does not yet have the GnuPG archive key of the backports.org repository installed, you will be asked to confirm installation of a package from an untrusted repository. Enter {{{Yes}}} when prompted.

 1. Install the DebianPkg:etch-backports/debhelper and DebianPkg:etch-backports/quilt packages: {{{
# aptitude -t etch-backports install debhelper quilt
$ exit
}}}
 1. Acquire a deprecated [[DebianPkg:src:alsa-driver|alsa-driver]] source package: {{{
$ dget -x http://snapshot.debian.net/archive/2008/04/07/debian/pool/main/a/alsa-driver/alsa-driver_1.0.16-1.1.dsc
}}}
 1. Build the binary packages: {{{
$ cd alsa-driver-1.0.16
$ dpkg-buildpackage -b -uc -rfakeroot
}}}
 1. Install the alsa-source package: {{{
$ cd ..
$ su
# dpkg -i ./alsa-source*deb
$ exit
}}}
 1. Build an alsa-modules-* package for your system: {{{
$ m-a -u /tmp build alsa
}}}
 1. Install the alsa-modules-* package: {{{
$ su
# dpkg -i /tmp/alsa-modules*deb
}}}
 1. If not already performed, install the DebianPkg:alsa-base and DebianPkg:alsa-utils packages: {{{
# aptitude install alsa-base alsa-utils
}}}
 1. Reload the ALSA modules and load the snd-cs46xx module: {{{
# invoke-rc.d alsa reload
# modprobe snd-cs46xx
}}}
 1. If not already performed, add your user account to the {{{audio}}} group, then log out and log back into your system: {{{
# adduser yourusername audio
# exit
$ exit
}}}
 1. Run [[DebianMan:1/alsamixer|alsamixer]], unmute channels and raise sound levels: {{{
$ alsamixer
}}}
 1. Test your sound device: {{{
$ aplay /usr/share/sounds/alsa/Noise.wav
}}}		 The snd-cs46xx module is not present within 2.6.24 Debian kernel images.
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You are required to supply one firmware file for device use. The snd-cs46xx module is included within 2.6.32 Debian kernel images. You are required to supply one firmware file for device use.

Translation(s): none

(!) ?Discussion

Cirrus Logic Sound Fusion CS4280, CS461x, CS462x, CS463x devices

This page describes the state of support for sound devices based on CS46xx chipsets on Debian systems.

Contents

  1. Cirrus Logic Sound Fusion CS4280, CS461x, CS462x, CS463x devices
    1. Installation
      1. Lenny
      2. Etch
      3. Squeeze
      4. Sid
    2. Supported Devices
    3. See Also

snd-cs46xx is a kernel module supporting Cirrus Logic's Sound Fusion CS46xx audio controllers. It is an ALSA driver provided in Linux 2.6 mainline kernels.

In linux-2.6 2.6.23-1, the binary-only firmware in this driver was removed (see the package changelog), due to discovered firmware licensing issues. The driver was disabled at this time. Firmware was also removed from the alsa-source package to resolve bug 483918.

In linux-2.6 2.6.31-1~experimental.1, the snd-cs46xx driver was re-enabled and patched to use firmware from userspace (resolving Debian bug 464197).

Device firmware is unable to be distributed by the Debian project, as the snd-cs46xx driver has no license.1 A free redistribution license has been requested from Cirrus Logic.2

Installation

Lenny

The snd-cs46xx module is not present within 2.6.26 Debian kernel images.

Etch

2.6.18 kernel

The snd-cs46xx module is included within 2.6.18 Debian kernel images. No firmware from userspace is required.

2.6.24 kernel

The snd-cs46xx module is not present within 2.6.24 Debian kernel images.

Squeeze

The snd-cs46xx module is not present within 2.6.30 Debian kernel images.

Sid

The snd-cs46xx module is included within 2.6.32 Debian kernel images. You are required to supply one firmware file for device use.

  1. Install the build-essential package: 

    $ su
# aptitude update
# aptitude install build-essential
# exit

  2. Download cs46xx_image.h from Linus' kernel tree: 

    $ wget 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob_plain;f=sound/pci/cs46xx/cs46xx_image.h;h=dc93f62db2c2b6ec624eda7bcb80a38baee5f47e;hb=HEAD' -O cs46xx_image.h

  3. Download source code for a program to write out firmware from cs46xx_image.h: 

    $ wget 'http://wiki.debian.org/snd-cs46xx?action=AttachFile&do=get&target=write_images.c' -O write_images.c

  4. Download a patch against cs46xx_image.h: 

    $ wget 'http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=181;att=0;bug=464197' -O cs46xx_image.diff

  5. Apply the patch: 

    $ patch -i cs46xx_image.diff

  6. Compile the write_images program: 

    $ gcc -o write_images write_images.c

  7. Execute the program to write out firmware: 

    $ ./write_images

  8. Install the firmware: 

    $ su
# mkdir -p /usr/local/lib/firmware/cs46xx
# cp cs46xx/cs46xx-old.fw /usr/local/lib/firmware/cs46xx

  9. Reload the snd-cs46xx module: 

    # modprobe -r snd-cs46xx && modprobe snd-cs46xx

  10. If not already performed, install the alsa-base and alsa-utils packages: 

    # aptitude install alsa-base alsa-utils

  11. If not already performed, add your user account to the audio group, then log out and log back into your system: 

    # adduser yourusername audio
# exit
$ exit

  12. Run alsamixer, unmute channels and raise sound levels: 

    $ alsamixer

  13. Test your sound device: 

    $ aplay /usr/share/sounds/alsa/Noise.wav

Troubleshooting

  • Examine the kernel ring buffer (dmesg(1)) to verify firmware is being loaded.

    • If output similar to the following is shown: 

      [16576.681738] Sound Fusion CS46xx 0000:00:06.0: found PCI INT A -> IRQ 11
[16576.681774] Sound Fusion CS46xx 0000:00:06.0: sharing IRQ 11 with 0000:00:02.0
[16576.681827] Sound Fusion CS46xx 0000:00:06.0: sharing IRQ 11 with 0000:01:00.0
[16577.224760] Sound Fusion CS46xx 0000:00:06.0: firmware: requesting cs46xx/cs46xx-old.fw
[16577.403887] cs46xx: firmware hunk out of range
[16577.406087] image download error
[16577.412213] Sound Fusion CS46xx: probe of 0000:00:06.0 failed with error

      The firmware is not in the correct format.

      • Ensure the patch for cs46xx_image.h is applied prior to compiling write_images.c.

      • Ensure write_images is executed on a system where unsigned long is little-endian 32-bit.

Supported Devices

The page HowToIdentifyADevice/PCI explains how to identify a PCI device.

The following list is based on the alias fields of modinfo snd-cs46xx in Debian 2.6.32 kernel images. 

  • PCI: 1013:6001 Cirrus Logic CS 4610/11 [CrystalClear SoundFusion Audio Accelerator]
PCI: 1013:6003 Cirrus Logic CS 4614/22/24/30 [CrystalClear SoundFusion Audio Accelerator]
PCI: 1013:6004 Cirrus Logic CS 4614/22/24 [CrystalClear SoundFusion Audio Accelerator]

See Also

CategoryHardware | CategorySound

  1. CS46xx sound driver carries no license - Kernel Bug Tracker Bug 10750 (1)

  2. cs46xx_image.h (sound/pci/cs46xx) - KernelFirmwareLicensing (2)