82 lines
3.3 KiB
Text
82 lines
3.3 KiB
Text
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Information about PowerPC Sound support
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=====================================================================
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Please mail me (Cort Dougan, cort@fsmlabs.com) if you have questions,
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comments or corrections.
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Last Change: 6.16.99
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This just covers sound on the PReP and CHRP systems for now and later
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will contain information on the PowerMac's.
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Sound on PReP has been tested and is working with the PowerStack and IBM
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Power Series onboard sound systems which are based on the cs4231(2) chip.
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The sound options when doing the make config are a bit different from
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the default, though.
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The I/O base, irq and dma lines that you enter during the make config
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are ignored and are set when booting according to the machine type.
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This is so that one binary can be used for Motorola and IBM machines
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which use different values and isn't allowed by the driver, so things
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are hacked together in such a way as to allow this information to be
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set automatically on boot.
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1. Motorola PowerStack PReP machines
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Enable support for "Crystal CS4232 based (PnP) cards" and for the
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Microsoft Sound System. The MSS isn't used, but some of the routines
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that the CS4232 driver uses are in it.
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Although the options you set are ignored and determined automatically
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on boot these are included for information only:
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(830) CS4232 audio I/O base 530, 604, E80 or F40
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(10) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15
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(6) CS4232 audio DMA 0, 1 or 3
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(7) CS4232 second (duplex) DMA 0, 1 or 3
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This will allow simultaneous record and playback, as 2 different dma
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channels are used.
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The sound will be all left channel and very low volume since the
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auxiliary input isn't muted by default. I had the changes necessary
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for this in the kernel but the sound driver maintainer didn't want
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to include them since it wasn't common in other machines. To fix this
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you need to mute it using a mixer utility of some sort (if you find one
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please let me know) or by patching the driver yourself and recompiling.
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There is a problem on the PowerStack 2's (PowerStack Pro's) using a
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different irq/drq than the kernel expects. Unfortunately, I don't know
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which irq/drq it is so if anyone knows please email me.
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Midi is not supported since the cs4232 driver doesn't support midi yet.
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2. IBM PowerPersonal PReP machines
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I've only tested sound on the Power Personal Series of IBM workstations
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so if you try it on others please let me know the result. I'm especially
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interested in the 43p's sound system, which I know nothing about.
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Enable support for "Crystal CS4232 based (PnP) cards" and for the
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Microsoft Sound System. The MSS isn't used, but some of the routines
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that the CS4232 driver uses are in it.
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Although the options you set are ignored and determined automatically
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on boot these are included for information only:
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(530) CS4232 audio I/O base 530, 604, E80 or F40
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(5) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15
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(1) CS4232 audio DMA 0, 1 or 3
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(7) CS4232 second (duplex) DMA 0, 1 or 3
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(330) CS4232 MIDI I/O base 330, 370, 3B0 or 3F0
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(9) CS4232 MIDI IRQ 5, 7, 9, 11, 12 or 15
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This setup does _NOT_ allow for recording yet.
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Midi is not supported since the cs4232 driver doesn't support midi yet.
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2. IBM CHRP
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I have only tested this on the 43P-150. Build the kernel with the cs4232
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set as a module and load the module with irq=9 dma=1 dma2=2 io=0x550
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