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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/powerpc/sound.txt | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/powerpc/sound.txt')
-rw-r--r-- | Documentation/powerpc/sound.txt | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/Documentation/powerpc/sound.txt b/Documentation/powerpc/sound.txt new file mode 100644 index 000000000000..df23d95e03a0 --- /dev/null +++ b/Documentation/powerpc/sound.txt @@ -0,0 +1,81 @@ + Information about PowerPC Sound support +===================================================================== + +Please mail me (Cort Dougan, cort@fsmlabs.com) if you have questions, +comments or corrections. + +Last Change: 6.16.99 + +This just covers sound on the PReP and CHRP systems for now and later +will contain information on the PowerMac's. + +Sound on PReP has been tested and is working with the PowerStack and IBM +Power Series onboard sound systems which are based on the cs4231(2) chip. +The sound options when doing the make config are a bit different from +the default, though. + +The I/O base, irq and dma lines that you enter during the make config +are ignored and are set when booting according to the machine type. +This is so that one binary can be used for Motorola and IBM machines +which use different values and isn't allowed by the driver, so things +are hacked together in such a way as to allow this information to be +set automatically on boot. + +1. Motorola PowerStack PReP machines + + Enable support for "Crystal CS4232 based (PnP) cards" and for the + Microsoft Sound System. The MSS isn't used, but some of the routines + that the CS4232 driver uses are in it. + + Although the options you set are ignored and determined automatically + on boot these are included for information only: + + (830) CS4232 audio I/O base 530, 604, E80 or F40 + (10) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15 + (6) CS4232 audio DMA 0, 1 or 3 + (7) CS4232 second (duplex) DMA 0, 1 or 3 + + This will allow simultaneous record and playback, as 2 different dma + channels are used. + + The sound will be all left channel and very low volume since the + auxiliary input isn't muted by default. I had the changes necessary + for this in the kernel but the sound driver maintainer didn't want + to include them since it wasn't common in other machines. To fix this + you need to mute it using a mixer utility of some sort (if you find one + please let me know) or by patching the driver yourself and recompiling. + + There is a problem on the PowerStack 2's (PowerStack Pro's) using a + different irq/drq than the kernel expects. Unfortunately, I don't know + which irq/drq it is so if anyone knows please email me. + + Midi is not supported since the cs4232 driver doesn't support midi yet. + +2. IBM PowerPersonal PReP machines + + I've only tested sound on the Power Personal Series of IBM workstations + so if you try it on others please let me know the result. I'm especially + interested in the 43p's sound system, which I know nothing about. + + Enable support for "Crystal CS4232 based (PnP) cards" and for the + Microsoft Sound System. The MSS isn't used, but some of the routines + that the CS4232 driver uses are in it. + + Although the options you set are ignored and determined automatically + on boot these are included for information only: + + (530) CS4232 audio I/O base 530, 604, E80 or F40 + (5) CS4232 audio IRQ 5, 7, 9, 11, 12 or 15 + (1) CS4232 audio DMA 0, 1 or 3 + (7) CS4232 second (duplex) DMA 0, 1 or 3 + (330) CS4232 MIDI I/O base 330, 370, 3B0 or 3F0 + (9) CS4232 MIDI IRQ 5, 7, 9, 11, 12 or 15 + + This setup does _NOT_ allow for recording yet. + + Midi is not supported since the cs4232 driver doesn't support midi yet. + +2. IBM CHRP + + I have only tested this on the 43P-150. Build the kernel with the cs4232 + set as a module and load the module with irq=9 dma=1 dma2=2 io=0x550 |