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Based on kernel version 3.16. Page generated on 2014-08-06 21:41 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, ionut@cs.columbia.edu
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.
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