linux/Documentation/powerpc/sound.txt
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   1            Information about PowerPC Sound support
   2=====================================================================
   3
   4Please mail me (Cort Dougan, cort@fsmlabs.com) if you have questions,
   5comments or corrections.
   6
   7Last Change: 6.16.99
   8
   9This just covers sound on the PReP and CHRP systems for now and later
  10will contain information on the PowerMac's.
  11
  12Sound on PReP has been tested and is working with the PowerStack and IBM
  13Power Series onboard sound systems which are based on the cs4231(2) chip.
  14The sound options when doing the make config are a bit different from
  15the default, though.
  16
  17The I/O base, irq and dma lines that you enter during the make config
  18are ignored and are set when booting according to the machine type.
  19This is so that one binary can be used for Motorola and IBM machines
  20which use different values and isn't allowed by the driver, so things
  21are hacked together in such a way as to allow this information to be
  22set automatically on boot.
  23
  241. Motorola PowerStack PReP machines
  25
  26  Enable support for "Crystal CS4232 based (PnP) cards" and for the
  27  Microsoft Sound System.  The MSS isn't used, but some of the routines
  28  that the CS4232 driver uses are in it.
  29
  30  Although the options you set are ignored and determined automatically
  31  on boot these are included for information only:
  32
  33  (830) CS4232 audio I/O base 530, 604, E80 or F40
  34  (10) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15
  35  (6) CS4232 audio DMA 0, 1 or 3
  36  (7) CS4232 second (duplex) DMA 0, 1 or 3
  37
  38  This will allow simultaneous record and playback, as 2 different dma
  39  channels are used.
  40
  41  The sound will be all left channel and very low volume since the
  42  auxiliary input isn't muted by default.  I had the changes necessary
  43  for this in the kernel but the sound driver maintainer didn't want
  44  to include them since it wasn't common in other machines.  To fix this
  45  you need to mute it using a mixer utility of some sort (if you find one
  46  please let me know) or by patching the driver yourself and recompiling.
  47
  48  There is a problem on the PowerStack 2's (PowerStack Pro's) using a
  49  different irq/drq than the kernel expects.  Unfortunately, I don't know
  50  which irq/drq it is so if anyone knows please email me.
  51
  52  Midi is not supported since the cs4232 driver doesn't support midi yet.
  53
  542. IBM PowerPersonal PReP machines
  55
  56  I've only tested sound on the Power Personal Series of IBM workstations
  57  so if you try it on others please let me know the result.  I'm especially
  58  interested in the 43p's sound system, which I know nothing about.
  59
  60  Enable support for "Crystal CS4232 based (PnP) cards" and for the
  61  Microsoft Sound System.  The MSS isn't used, but some of the routines
  62  that the CS4232 driver uses are in it.
  63
  64  Although the options you set are ignored and determined automatically
  65  on boot these are included for information only:
  66
  67  (530) CS4232 audio I/O base 530, 604, E80 or F40
  68  (5) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15
  69  (1) CS4232 audio DMA 0, 1 or 3
  70  (7) CS4232 second (duplex) DMA 0, 1 or 3
  71  (330) CS4232 MIDI I/O base 330, 370, 3B0 or 3F0
  72  (9) CS4232 MIDI IRQ 5, 7, 9, 11, 12 or 15
  73
  74  This setup does _NOT_ allow for recording yet.
  75
  76  Midi is not supported since the cs4232 driver doesn't support midi yet.
  77
  782. IBM CHRP
  79
  80  I have only tested this on the 43P-150.  Build the kernel with the cs4232
  81  set as a module and load the module with irq=9 dma=1 dma2=2 io=0x550
  82
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