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 Posted: Jan 11, 2009 - 09:41 AM |
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Joined: Sep 18, 2004
Posts: 643
Location: Brisbane, Australia
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I was wondering what steps are required to create a /dev/dsp device on my NGW100 using the ABDAC audio driver?
I have spent a couple of days trawling through the relevant posts which I could find as well as the OSS documentation but can't get the driver loaded.
Using Buildroot2.3.0 I have tried starting with the atngw100_defconfig and then added madplay, alsa utils and ncurses etc.
I then go into:
buildroot-avr32-v2.3.0/project_build_avr32/{name_of_my_configuration}/linux-2.6.27.6/arch/avr32/boards/atngw100
and edit the setup.c file so that it includes:
Code:
"at32_add_device_abdac(0);"
in the function
Code:
static int __init atngw100_init(void)
I then go and edit the .config file that is the lowest directory of Buildroot and add the following:
Code:
#
# Sound
#
CONFIG_SOUND=m
#
# Advanced Linux Sound Architecture
#
CONFIG_SND=m
CONFIG_SND_TIMER=m
CONFIG_SND_PCM=m
# CONFIG_SND_SEQUENCER is not set
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
# CONFIG_SND_DYNAMIC_MINORS is not set
# CONFIG_SND_SUPPORT_OLD_API is not set
CONFIG_SND_VERBOSE_PROCFS=y
CONFIG_SND_VERBOSE_PRINTK=y
CONFIG_SND_DEBUG=y
CONFIG_SND_DEBUG_DETECT=y
# CONFIG_SND_PCM_XRUN_DEBUG is not set
#
# Generic devices
#
CONFIG_SND_AC97_CODEC=m
CONFIG_SND_AC97_BUS=m
CONFIG_SND_DUMMY=m
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
#
# ALSA AVR32 devices
#
CONFIG_SND_ATMEL_AC97=m
CONFIG_SND_ATMEL_AC97_USE_ALSA_MALLOC_CALLS=y
CONFIG_SND_ATMEL_AC97C_USE_PDC=y
CONFIG_SND_AT73C213=m
CONFIG_SND_AT73C213_USE_ALSA_MALLOC_CALLS=y
#
# Open Sound System
#
CONFIG_SOUND_PRIME=m
# CONFIG_OSS_OBSOLETE_DRIVER is not set
# CONFIG_SOUND_MSNDCLAS is not set
# CONFIG_SOUND_MSNDPIN is not set
CONFIG_SOUND_AT32_DAC=m
I then 'make' that configuration and move it to my NGW100.
On my NGW100 I only get:
Code:
./sys/devices/platform/abdac.0
./sys/bus/platform/devices/abdac.0
and nothing relevant in the /dev/ directory.
Does anyone know what I need to do to get the ABDAC loaded as /dev/dsp on my NGW100 using Buildroot2.3.0?
[/code] |
_________________
Dingo_aus
http://www.users.on.net/~symes/
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Posted: Jan 11, 2009 - 02:13 PM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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| ABDAC does not work in kernel 2.6.27, because the driver is not ported to the new DMA framework. |
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Posted: Jan 12, 2009 - 09:43 AM |
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Joined: Sep 18, 2004
Posts: 643
Location: Brisbane, Australia
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Posted: Jan 12, 2009 - 09:46 AM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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Dingo_aus wrote:
Oh ok, thanks hce.
The ac97 code is still good in 2.6.27 onwards right?
Nope, same problem.
On the good side, I am working on the AC97C driver as we speak. Will be sent to the AVR32 kernel list and ALSA list when done.
ABDAC will follow after that, rewritten to ALSA. |
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Posted: Jan 12, 2009 - 11:19 PM |
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Joined: Sep 18, 2004
Posts: 643
Location: Brisbane, Australia
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Posted: Jan 13, 2009 - 03:59 PM |
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Joined: Oct 18, 2007
Posts: 21
Location: Salzburg
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Hey =)
When will the AC97 driver be approximately finished?
Im currently working on a larger project and everything works fine, except for the AC97, the thing is that my wirless card needs a kernel above 2.6.28 so a can't use the old kernel where the driver is working...
Best Regards
BWA |
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Posted: Jan 13, 2009 - 06:32 PM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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I actually got sound today, and it seems like I will not need to modify the DMA framework in the kernel (which is a very good thing).
But there are some problems I need to sort out with cleaning up after the DMA, because the way it is now I run out of descriptors after a few skips in the sound file or playing several files.
Removing the driver does not work either 
I would recommend to subscribe to the AVR32 kernel list, link somewhere on http://avr32linux.org I will use that list for review when I am confident that it works. |
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Posted: Jan 13, 2009 - 11:38 PM |
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Joined: Sep 18, 2004
Posts: 643
Location: Brisbane, Australia
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Posted: Jan 17, 2009 - 11:03 AM |
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Joined: Oct 18, 2007
Posts: 21
Location: Salzburg
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Hey =)
I already member of the kernel mailing list =)
not much going on there in the last weeks...
I'm really in dire need of that driver, right now... is it possible that you send me a patch, wheather it is stable or not, i just need to get out a few beeps...
my e-mail is bwa [at] berniwa [dot] com
I'd really appreciate that...
Greets from Austria =)
Bernhard |
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Posted: Jan 17, 2009 - 03:32 PM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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| The current state of the AC97C driver is that it crashes the kernel when you stop the playback So it is not useful for anything. |
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Posted: Jan 20, 2009 - 07:32 AM |
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Joined: Sep 22, 2008
Posts: 8
Location: Germany
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How can I find more information’s about ABDAC audio? At the beginning I started with the Application Note "AVR32120: AVR32 ABDAC audio bitstream DAC driver example" and use the component TPA152.
It's the sound okay?
Dingo_aus wrote:
buildroot-avr32-v2.3.0/project_build_avr32/{name_of_my_configuration}/linux-2.6.27.6/arch/avr32/boards/atngw100
and edit the setup.c file so that it includes:
Code:
Code:
"at32_add_device_abdac(0);"
Must I include more code in setup.c or it's all?
I use Buildroot 2.2.1 with kernel 2.6.23.
Donni Duck |
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Posted: Jan 20, 2009 - 07:44 AM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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| You also need to enable the ABDAC driver as well, it is in drivers -> sound -> OSS -> AVR32 or something like that. |
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Posted: Jul 02, 2009 - 07:10 AM |
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Joined: May 03, 2003
Posts: 7
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Is there any information which describes the procedure of adding any audio-device (ac97 or abdac) on NGW100 with actual kernel 2.6.30 (git-checkout 30.06.2009 master branch)?
I've been searchin' for quite some time now, but e.g. "at32_add_device_abdac(0)" is not practical any more (no such function).
Any help is appreciated. |
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Posted: Jul 02, 2009 - 07:22 AM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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Take a look in arch/avr32/mach-at32ap/include/mach/board.h for a description of at32_add_device_abdac() parameters. And in arch/avr32/boards/favr-32/setup.c for an example usage.
For AC97 you could look at the arch/avr32/boards/atngw100/evklcd10x.c file. |
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Posted: Jul 02, 2009 - 11:04 AM |
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Joined: May 03, 2003
Posts: 7
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| Thanks a lot. As soon as I'm at home again, I will have a look. |
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Posted: Feb 15, 2010 - 02:30 PM |
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Joined: Dec 21, 2009
Posts: 6
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Getting ready to submit my ac97 board design to the fab house, but before I do, I thought I'd try compiling a kernel with the appropriate modules in it, and try loading the abdac module, since it's built in to the AP7000 ...
Code:
/lib/modules/2.6.32.8/kernel/sound/atmel # ls
snd-atmel-abdac.ko snd-atmel-ac97c.ko
/lib/modules/2.6.32.8/kernel/sound/atmel # uname -a
Linux ngw.example.net 2.6.32.8 #2 Fri Feb 12 09:42:16 EST 2010 avr32 unknown
/lib/modules/2.6.32.8/kernel/sound/atmel # modprobe snd-atmel-abdac
modprobe: Failed to load module snd_atmel_abdac: No such device.
/lib/modules/2.6.32.8/kernel/sound/atmel #
Should I be loading some other module first? Or is the problem likely related to having different kernel and userland versions? Or am I mistaken in thinking that no external hardware is required to make the abdac work? Or is there some other way in which I'm Doing It Wrong? |
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Posted: Feb 16, 2010 - 06:16 PM |
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Joined: Jan 07, 2003
Posts: 4580
Location: Oslo, Norway
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| In your board code, do you add the abdac platform device? |
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Posted: Feb 16, 2010 - 09:44 PM |
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Joined: Dec 21, 2009
Posts: 6
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In my board code? Where is that?
I'm just trying to load the module I'd compiled, which is what I'm used to doing on linux on regular PCs.
If you're referring to the "Select an NGW100 add-on board to support" in the kernel, I've tried both options there ... or do I need to write my own board support code from scratch? If so, is there a quick-and-dirty getting started guide for someone who has a fairly good knowledge of C already?
I've read a few posts about people doing things to some sort of setup.c ... is that the one in linux-2.6.32.8/arch/avr32/boards/atngw100? Is that what I need to be modifying, and is there some sort of guide for that? |
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Posted: Feb 17, 2010 - 03:14 AM |
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Joined: Dec 21, 2009
Posts: 6
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Posted: Mar 06, 2010 - 08:30 AM |
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Joined: Mar 10, 2008
Posts: 24
Location: somewhere
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bradn8vi wrote:
linux-2.6.32.8/arch/avr32/boards/atngw100
Where can I find a guide to use the newer kernel with a NGW100? |
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