From: James Courtier-Dutton <James@superbug.demon.co.uk>
To: Takashi Iwai <tiwai@suse.de>
Cc: alsa-devel@lists.sourceforge.net
Subject: Re: ALC650 GPIO bits
Date: Wed, 03 Mar 2004 15:48:54 +0000 [thread overview]
Message-ID: <4045FE66.1040701@superbug.demon.co.uk> (raw)
In-Reply-To: <s5h7jy2lzic.wl@alsa2.suse.de>
Takashi Iwai wrote:
> Hi,
>
> it seems that some mobo with ALC650 uses GPIO 0 as the mic bias +5V.
>
> in ac97_patch.c, the GPIO 0 is turned on/off in conjunction with
> the mic/center sharing switch, but this handling appears only for the
> old ALC650 revision (D or older).
>
> interestingly, there is a report that even a mobo with the newer
> revision of ALC650 has this GPIO bit.
> now, the question is why GPIO is not handled with the revision E and
> F. i can't remember the reason (google gives no good info) -- does
> anyone still know?
>
> is there any mobo with a side effect of this GPIO?
>
>
> Takashi
>
The best source I found for ALC650 info is from the Realtek web site.
http://www.realtek.com.tw/downloads/dlac97-1.aspx
1) They have a datasheet for the ALC650, although the datasheets have
errors in them.
http://www.realtek.com.tw/downloads/downloads1-3.aspx?lineid=5&famid=12&series=8&Spec=True&refdesign=True
2) They have their own version of the alsa-driver, which you can look at
to see what they do about things like this. Just download their linux
driver. It is alsa-driver source code.
http://www.realtek.com.tw/downloads/dlac97-2.aspx?lineid=5&famid=12&series=8&Software=True#8Unix%20(Linux)
Cheers
James
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next prev parent reply other threads:[~2004-03-03 15:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-03 15:30 ALC650 GPIO bits Takashi Iwai
2004-03-03 15:48 ` James Courtier-Dutton [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-03-03 17:13 p z oooo
2004-03-03 17:54 ` Takashi Iwai
2004-03-03 17:14 p z oooo
2004-03-03 17:22 p z oooo
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