Re: AW: Sound on an iBook?

Re: AW: Sound on an iBook?

[Iain Sandoe]

duh! just read the whole thread...

[...]
> Christof could always resort to petitioning Apple to release the specs, or
> digging though Darwin source code to discover the secret.

the chip specs are freely available:

http://www.micronas.com/documentation/data_sheet/dac3550a_1ds.pdf

Ben H might know something about driving the iBook i2c busses - I think that
they are the new Apple "cereal" style which are also present on the PCI host
bridges... but not quite sure.

Iain.

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Re: AW: Sound on an iBook?

[Christof Petig]

Iain Sandoe wrote:

> duh! just read the whole thread...
>
> [...]
> > Christof could always resort to petitioning Apple to release the specs, or
> > digging though Darwin source code to discover the secret.
>
> the chip specs are freely available:
>
> http://www.micronas.com/documentation/data_sheet/dac3550a_1ds.pdf
>
> Ben H might know something about driving the iBook i2c busses - I think that
> they are the new Apple "cereal" style which are also present on the PCI host
> bridges... but not quite sure.

The link is dead, but
http://www.micronas.com/products/documentation/consumer/dac3550a/index.php
works for me well.

Thank you very much for this information!

Christof


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Re: Sound on an iBook?

[Christof Petig]

Benjamin Herrenschmidt wrote:

> >The link is dead, but
> >http://www.micronas.com/products/documentation/consumer/dac3550a/index.php
> >works for me well.
> >
> >Thank you very much for this information!
>
> Enclosed is Darwin's source for the audio and the I2C controller.
>
> You'll notice that they have 2 copies of the I2C code (one in the
> audio driver itself and one separate). A quick look shows they are
> identical (or very similar), but you should diff them to be sure.
>
> Ben.
>
>   ------------------------------------------------------------------------
>                   Name: Archive.sit
>    Archive.sit    Type: Macintosh StuffIt Archive (application/x-stuffit)
>               Encoding: base64

Thank you very much!

Darwin is GPL, isn't it? So I can copy and modify the code for linux-kernel?

Christof

PS: I cc'd linuxppc to tell the public that I started hacking on it (in
whatever free time is left to me).


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Re: Sound on an iBook?

[Ethan Benson]

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On Mon, Dec 11, 2000 at 09:30:49AM +0100, Christof Petig wrote:
> 
> Benjamin Herrenschmidt wrote:
> 
> > >The link is dead, but
> > >http://www.micronas.com/products/documentation/consumer/dac3550a/index.php
> > >works for me well.
> > >
> > >Thank you very much for this information!
> >
> > Enclosed is Darwin's source for the audio and the I2C controller.
> >
> > You'll notice that they have 2 copies of the I2C code (one in the
> > audio driver itself and one separate). A quick look shows they are
> > identical (or very similar), but you should diff them to be sure.
> >
> > Ben.
> >
> >   ------------------------------------------------------------------------
> >                   Name: Archive.sit
> >    Archive.sit    Type: Macintosh StuffIt Archive (application/x-stuffit)
> >               Encoding: base64
> 
> Thank you very much!
> 
> Darwin is GPL, isn't it? So I can copy and modify the code for linux-kernel?

it most certainly is not, Darwin is under a non-free licence known as
the APSL.  it is not compatible with the GPL and may not be used in
any GPLed projects.  it is not free software.

-- 
Ethan Benson
http://www.alaska.net/~erbenson/

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Re: Sound on an iBook?

[Benjamin Herrenschmidt]

>Thank you very much!
>
>Darwin is GPL, isn't it? So I can copy and modify the code for linux-kernel?
>
>Christof
>
>PS: I cc'd linuxppc to tell the public that I started hacking on it (in

No you can't. Darwin is using a different licence that is not compatible
with the GPL. You can "use" the Apple code as a reference to how the
hardware works, but you can't re-use it "as is".

ben.


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Re: Sound on an iBook?

[Christof Petig]

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Benjamin Herrenschmidt wrote:

> No you can't. Darwin is using a different licence that is not compatible
> with the GPL. You can "use" the Apple code as a reference to how the
> hardware works, but you can't re-use it "as is".

Ok. Understood. I vaguely remember RMStallman warning of the apple source
license.
Another time to reimplement the wheel.

Here is a port of the unofficial hack to 2.4. It works well for me (booting via
OF without Apple OS).
Volume setting still needs to be resolved. I'll try it via linux' IIC layer.

Christof


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--- dmasound_awacs.c.orig	Mon Dec 11 22:35:59 2000
+++ dmasound_awacs.c	Mon Dec 11 22:49:24 2000
@@ -1978,7 +1978,7 @@
 		 * with a child called "sound".
 		 */
 		struct device_node *sound;
-		np = find_devices("davbus");
+		np = find_devices("i2s-a");
 		sound = find_devices("sound");
 		if (sound != 0 && sound->parent == np) {
 			unsigned int *prop, l, i;
@@ -2029,8 +2029,9 @@
 		int vol;
 		dmasound.mach = machPMac;

-		awacs = (volatile struct awacs_regs *)
-			ioremap(np->addrs[0].address, 0x80);
+		/* awacs = (volatile struct awacs_regs *)
+			ioremap(np->addrs[0].address, 0x80); */
+		awacs = kmalloc(sizeof(struct awacs_regs),GFP_KERNEL);
 		awacs_txdma = (volatile struct dbdma_regs *)
 			ioremap(np->addrs[1].address, 0x100);
 		awacs_rxdma = (volatile struct dbdma_regs *)

Sound on an iBook?

[Christof Petig]

Hello,

I got no answer on the debian-ppc list, so I'll try here.

does anybody know a way to get the sound hardware on my iBook working?
Everything else is working fine.

Your's
   Christof

OF says:
# cat
/proc/device-tree/pci@f2000000/mac-io@17/i2s@10000/i2s-a@10000/sound/compatible

daca
# cat
/proc/device-tree/pci@f2000000/mac-io@17/i2s@10000/i2s-a@10000/soun/device_type

soundchip
# cat
/proc/device-tree/pci@f2000000/mac-io@17/i2s@10000/i2s-a@10000/sound/model

353S0228
# cat
/proc/device-tree/pci@f2000000/mac-io@17/i2s@10000/i2s-a@10000/so/sound-objects

feature index 0 model Proj8PowerControlfeature index 1 model
USBSubwooferfeature index 2 model NotifySSprocketsdetect AAPL,address
0x00000064 bit-mask 2 bit-match 2 device 2 index 0 model GPIODetect
registry-name extint-gpio12input icon-id -20183 index 0 name-id -20540
port-connection 2 port-type 0x6D6F646D zero-gain 0 model
NoRecordInputinput index 1 model NoInputoutput device-mask 2
device-match 0 icon-id -16563 index 0 name-id -20525 port-connection 1
port-type 0x6973706b model OutputPortoutput device-mask 2 device-match 2
icon-id -16563 index 1 name-id -20524 port-connection 2 port-type
0x6864706e model OutputPort

# od -tu2
/proc/device-tree/pci@f2000000/mac-io@17/i2s@10000/i2s-a@10000/sound/sample-rates

0000000     0     1 44100     0

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