Based on kernel version 4.1. Page generated on 2015-06-28 12:14 EST.
1 Documentation for the SoundPro CMI8330 extensions in the WSS driver (ad1848.o) 2 ------------------------------------------------------------------------------ 3 4 ( Be sure to read Documentation/sound/oss/CMI8330 too ) 5 6 Ion Badulescu, firstname.lastname@example.org 7 February 24, 1999 8 9 (derived from the OPL3-SA2 documentation by Scott Murray) 10 11 The SoundPro CMI8330 (ISA) is a chip usually found on some Taiwanese 12 motherboards. The official name in the documentation is CMI8330, SoundPro 13 is the nickname and the big inscription on the chip itself. 14 15 The chip emulates a WSS as well as a SB16, but it has certain differences 16 in the mixer section which require separate support. It also emulates an 17 MPU401 and an OPL3 synthesizer, so you probably want to enable support 18 for these, too. 19 20 The chip identifies itself as an AD1848, but its mixer is significantly 21 more advanced than the original AD1848 one. If your system works with 22 either 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. 24 Detection should work, but it hasn't been widely tested, so it might still 25 mis-identify the chip. You can still force soundpro=1 in the modprobe 26 parameters for ad1848. Please let me know if it happens to you, so I can 27 adjust the detection routine. 28 29 The chip is capable of doing full-duplex, but since the driver sees it as an 30 AD1848, it cannot take advantage of this. Moreover, the full-duplex mode is 31 not achievable through the WSS interface, b/c it needs a dma16 line which is 32 assigned only to the SB16 subdevice (with isapnp). Windows documentation 33 says the user must use WSS Playback and SB16 Recording for full-duplex, so 34 it might be possible to do the same thing under Linux. You can try loading 35 up both ad1848 and sb then use one for playback and the other for 36 recording. I don't know if this works, b/c I haven't tested it. Anyway, if 37 you try it, be very careful: the SB16 mixer *mostly* works, but certain 38 settings can have unexpected effects. Use the WSS mixer for best results. 39 40 There is also a PCI SoundPro chip. I have not seen this chip, so I have 41 no idea if the driver will work with it. I suspect it won't. 42 43 As with PnP cards, some configuration is required. There are two ways 44 of doing this. The most common is to use the isapnptools package to 45 initialize the card, and use the kernel module form of the sound 46 subsystem and sound drivers. Alternatively, some BIOS's allow manual 47 configuration of installed PnP devices in a BIOS menu, which should 48 allow using the non-modular sound drivers, i.e. built into the kernel. 49 Since in this latter case you cannot use module parameters, you will 50 have to enable support for the SoundPro at compile time. 51 52 The IRQ and DMA values can be any that are considered acceptable for a 53 WSS. Assuming you've got isapnp all happy, then you should be able to 54 do something like the following (which *must* match the isapnp/BIOS 55 configuration): 56 57 modprobe ad1848 io=0x530 irq=11 dma=0 soundpro=1 58 -and maybe- 59 modprobe sb io=0x220 irq=5 dma=1 dma16=5 60 61 -then- 62 modprobe mpu401 io=0x330 irq=9 63 modprobe opl3 io=0x388 64 65 If all goes well and you see no error messages, you should be able to 66 start using the sound capabilities of your system. If you get an 67 error message while trying to insert the module(s), then make 68 sure that the values of the various arguments match what you specified 69 in your isapnp configuration file, and that there is no conflict with 70 another 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 72 butting heads with another device. 73 74 If you do not see the chipset version message, and none of the other 75 messages present in the system log are helpful, try adding 'debug=1' 76 to the ad1848 parameters, email me the syslog results and I'll do 77 my best to help. 78 79 Lastly, if you're using modules and want to set up automatic module 80 loading with kmod, the kernel module loader, here is the section I 81 currently use in my conf.modules file: 82 83 # Sound 84 post-install sound modprobe -k ad1848; modprobe -k mpu401; modprobe -k opl3 85 options ad1848 io=0x530 irq=11 dma=0 86 options sb io=0x220 irq=5 dma=1 dma16=5 87 options mpu401 io=0x330 irq=9 88 options opl3 io=0x388 89 90 The above ensures that ad1848 will be loaded whenever the sound system 91 is being used. 92 93 Good luck. 94 95 Ion 96 97 NOT REALLY TESTED: 98 - recording 99 - recording device selection 100 - full-duplex 101 102 TODO: 103 - implement mixer support for surround, loud, digital CD switches. 104 - come up with a scheme which allows recording volumes for each subdevice. 105 This is a major OSS API change.