Date: Fri, 17 Mar 2000 16:17:02 +0900 From: haro@tk.kubota.co.jp (Munehiro Matsuda) To: will@iki.fi Cc: darrylo@sr.hp.com, julian@elischer.org, freebsd-current@freebsd.org, haro@tk.kubota.co.jp Subject: Re: [sound] PCI ESS support Message-ID: <20000317161702A.haro@tk.kubota.co.jp> In-Reply-To: <86itymyuz0.fsf@not.demophon.com> References: <200003161702.JAA23772@mina.sr.hp.com.newsgate.clinet.fi> <86itymyuz0.fsf@not.demophon.com>
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From: Ville-Pertti Keinonen <will@iki.fi>
Date: 17 Mar 2000 08:24:51 +0200
::Another (perhaps simpler) alternative might be to try to get it to
::work in SB emulation mode.
::
::I've managed to get it to probe as a SoundBlaster (just by adding
::pci_write_config(dev, 0x41, 0x10, 1) to the probe code in my mixer
::driver):
::
::sbc0: <Soundblaster Pro> at port 0x220-0x22f irq 5 drq 1 on isa0
::
::However, it doesn't work (the interfaces seem to work, but the mixer
::settings don't affect anything and playback doesn't get anywhere) and
::I still haven't had time to look at it properly (and don't expect to
::any time soon).
Well, it's not that simple.
When I tried to write driver for it last year, I found that:
1) You also need to setup ASSP (Application Specific Signal Processor)
in the chip and GPIO properly.
Source code for BTM2E.EXE should be a help here.
(I didn't have that source, when I was tryng to write the driver.)
2) For DMA to work, you need to support DDMA in FreeBSD.
I have small patch for 3-stable, but will not work with -current
due to newbus changes.
3) When Maestro2E acts as Soundblaster Pro emulation, DSP_CMD_GETVER
returns 0x302 (or may be it was 0x303?), that are not supported in
newpcm and luigi's pcm drivers.
May be the current support for ver=0x301 work? I have no clue here.
If I get the time, I could try to write from scratch, again.
Haro
=------------------------------------------------------------------------------
_ _ Munehiro (haro) Matsuda
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Email: haro@tk.kubota.co.jp
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