Date: Mon, 25 Nov 2002 01:12:08 +0900 From: Watanabe Kazuhiro <CQG00620@nifty.ne.jp> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/45679: Cannot record except 8bit-mono with CS4231A & newpcm (half-duplex mode) Message-ID: <200211241621.BAA13362@ums509.nifty.ne.jp>
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>Number: 45679
>Category: kern
>Synopsis: Cannot record except 8bit-mono with CS4231A & newpcm (half-duplex mode)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Nov 24 08:30:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Watanabe Kazuhiro
>Release: FreeBSD 4.5-RELEASE i386
>Organization:
>Environment:
System: FreeBSD aries.zodiac.org 4.5-RELEASE FreeBSD 4.5-RELEASE #13: Sun Nov
24 15:30:52 JST 2002 nabe@aries.zodiac.org:/usr/src/sys/compile/LEFTEYE
i386
dmesg:
pcm0: <CS4231A> at port 0xf40-0xf47 irq 10 drq 1 flags 0x1a100 on isa0
drq/irq conf 1a
I'm tested on NEC PC-9821Xa9 and applied a patch posted below:
>Description:
With newpcm driver that probed CS4231A on half-duplex mode, only record
8bit-mono. Other formats (16bit and/or stereo) cannot record exactly.
The problem is happened in any sample rate.
OSS/Free driver work fine.
In newpcm driver, CS4231A is set to Mode2 (enhanced mode). In Mode2,
recording format should be set to a register I28.
But newpcm driver is not set the I28 in half-duplex mode.
The problem is always happened in NEC PC98's internal CS4231A, which
support half-duplex only.
>How-To-Repeat:
Wavrec is a part of ports/audio/wavplay.
cat /dev/sndstat
FreeBSD Audio Driver (newpcm) Oct 15 2002 22:36:30
Installed devices:
pcm0: <CS4231A> at io 0xf40 irq 10 drq 1 (1p/1r/0v channels)
# it's not full-duplex.
/usr/bin/time wavrec -M -b 8 -t 5 foo.wav # mono/8bit/5sec.
5.28 real 0.01 user 0.28 sys
# work fine.
/usr/bin/time wavrec -S -b 16 -t 5 bar.wav # stereo/16bit/5sec.
20.27 real 0.00 user 0.40 sys
# four times as many as five seconds.
/usr/bin/time wavplay bar.wav
Pathname: test.wav
Device: /dev/audio
Sampling Rate: 22050 Hz
Mode: Stereo
Samples: 110250
Bits: 16
5.22 real 0.02 user 0.29 sys
# sounds like a tongle twister.
>Fix:
In OSS/Free driver, the I28 register is set unconditionally.
I don't know what a modification is the best way.
--- mss.c.orig Sun Nov 24 23:40:02 2002
+++ mss.c Sun Nov 24 23:40:08 2002
@@ -998,7 +998,9 @@
arg <<= 4;
ad_enter_MCE(mss);
ad_write(mss, 8, (ad_read(mss, 8) & 0x0f) | arg);
- if (FULL_DUPLEX(mss)) ad_write(mss, 28, arg); /* capture mode */
+ if (ad_read(mss, 12) & 0x40) { /* mode2 ? */
+ ad_write(mss, 28, arg); /* capture mode */
+ }
ad_leave_MCE(mss);
return format;
}
>Release-Note:
>Audit-Trail:
>Unformatted:
>> "PC98 internal CS4231A is mis-detected to OPTi chip (newpcm)"
>> http://www.freebsd.org/cgi/query-pr.cgi?pr=45673
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