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1 | Information about PowerPC Sound support |
2 | ===================================================================== |
3 | |
4 | Please mail me (Cort Dougan, cort@fsmlabs.com) if you have questions, |
5 | comments or corrections. |
6 | |
7 | Last Change: 6.16.99 |
8 | |
9 | This just covers sound on the PReP and CHRP systems for now and later |
10 | will contain information on the PowerMac's. |
11 | |
12 | Sound on PReP has been tested and is working with the PowerStack and IBM |
13 | Power Series onboard sound systems which are based on the cs4231(2) chip. |
14 | The sound options when doing the make config are a bit different from |
15 | the default, though. |
16 | |
17 | The I/O base, irq and dma lines that you enter during the make config |
18 | are ignored and are set when booting according to the machine type. |
19 | This is so that one binary can be used for Motorola and IBM machines |
20 | which use different values and isn't allowed by the driver, so things |
21 | are hacked together in such a way as to allow this information to be |
22 | set automatically on boot. |
23 | |
24 | 1. 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 | |
54 | 2. 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 | |
78 | 2. 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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