1Documentation for the SoundPro CMI8330 extensions in the WSS driver (ad1848.o)
   4( Be sure to read Documentation/sound/oss/CMI8330 too )
   6Ion Badulescu,
   7February 24, 1999
   9(derived from the OPL3-SA2 documentation by Scott Murray)
  11The SoundPro CMI8330 (ISA) is a chip usually found on some Taiwanese
  12motherboards.  The official name in the documentation is CMI8330, SoundPro
  13is the nickname and the big inscription on the chip itself.
  15The chip emulates a WSS as well as a SB16, but it has certain differences
  16in the mixer section which require separate support. It also emulates an
  17MPU401 and an OPL3 synthesizer, so you probably want to enable support
  18for these, too.
  20The chip identifies itself as an AD1848, but its mixer is significantly
  21more advanced than the original AD1848 one. If your system works with
  22either WSS or SB16 and you are having problems with some mixer controls
  23(no CD audio, no line-in, etc), you might want to give this driver a try.
  24Detection should work, but it hasn't been widely tested, so it might still
  25mis-identify the chip. You can still force soundpro=1 in the modprobe
  26parameters for ad1848. Please let me know if it happens to you, so I can
  27adjust the detection routine.
  29The chip is capable of doing full-duplex, but since the driver sees it as an
  30AD1848, it cannot take advantage of this.  Moreover, the full-duplex mode is
  31not achievable through the WSS interface, b/c it needs a dma16 line which is
  32assigned only to the SB16 subdevice (with isapnp). Windows documentation
  33says the user must use WSS Playback and SB16 Recording for full-duplex, so
  34it might be possible to do the same thing under Linux. You can try loading
  35up both ad1848 and sb then use one for playback and the other for
  36recording. I don't know if this works, b/c I haven't tested it. Anyway, if
  37you try it, be very careful: the SB16 mixer *mostly* works, but certain
  38settings can have unexpected effects. Use the WSS mixer for best results.
  40There is also a PCI SoundPro chip. I have not seen this chip, so I have
  41no idea if the driver will work with it. I suspect it won't.
  43As with PnP cards, some configuration is required.  There are two ways
  44of doing this.  The most common is to use the isapnptools package to
  45initialize the card, and use the kernel module form of the sound
  46subsystem and sound drivers.  Alternatively, some BIOS's allow manual
  47configuration of installed PnP devices in a BIOS menu, which should
  48allow using the non-modular sound drivers, i.e. built into the kernel.
  49Since in this latter case you cannot use module parameters, you will
  50have to enable support for the SoundPro at compile time.
  52The IRQ and DMA values can be any that are considered acceptable for a
  53WSS.  Assuming you've got isapnp all happy, then you should be able to
  54do something like the following (which *must* match the isapnp/BIOS
  57modprobe ad1848 io=0x530 irq=11 dma=0 soundpro=1
  58-and maybe-
  59modprobe sb io=0x220 irq=5 dma=1 dma16=5
  62modprobe mpu401 io=0x330 irq=9
  63modprobe opl3 io=0x388
  65If all goes well and you see no error messages, you should be able to
  66start using the sound capabilities of your system.  If you get an
  67error message while trying to insert the module(s), then make
  68sure that the values of the various arguments match what you specified
  69in your isapnp configuration file, and that there is no conflict with
  70another device for an I/O port or interrupt.  Checking the contents of
  71/proc/ioports and /proc/interrupts can be useful to see if you're
  72butting heads with another device.
  74If you do not see the chipset version message, and none of the other
  75messages present in the system log are helpful, try adding 'debug=1'
  76to the ad1848 parameters, email me the syslog results and I'll do
  77my best to help. 
  79Lastly, if you're using modules and want to set up automatic module
  80loading with kmod, the kernel module loader, here is the section I
  81currently use in my conf.modules file:
  83# Sound
  84post-install sound modprobe -k ad1848; modprobe -k mpu401; modprobe -k opl3
  85options ad1848 io=0x530 irq=11 dma=0
  86options sb io=0x220 irq=5 dma=1 dma16=5
  87options mpu401 io=0x330 irq=9
  88options opl3 io=0x388
  90The above ensures that ad1848 will be loaded whenever the sound system
  91is being used.
  93Good luck.
  98- recording
  99- recording device selection
 100- full-duplex
 103- implement mixer support for surround, loud, digital CD switches.
 104- come up with a scheme which allows recording volumes for each subdevice.
 105This is a major OSS API change.