maestro3 hardware volume control

maestro3 hardware volume control

[rwd]

Hi,

the maestro3 runs fine on my compaq evo n400c (ES1988). Just one thing
remains unsolved - the 2 nice volume control buttons that seem to be wired
directly to the ES1988 won't work until now. 

I'm relatively new to linux and not a driver programmer, but scrolling
through the documentation of the chip & the driver source quickly revealed
that the volume can be controlled directly by two buttons, but the driver
doesn't seem make use of that. 

Can anybody give me a hint how to use/enable the hardware volume control on
that chip? Is a major rewrite of the driver required? Maybe some other
driver could do that? The es1968 seems to support hw vol, might that driver
run also on the ES1988?

Thanks & best regards, Ruediger



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Re: maestro3 hardware volume control

[Takashi Iwai]

At Mon, 18 Apr 2005 15:22:58 +0200,
rwd wrote:
> 
> Hi,
> 
> the maestro3 runs fine on my compaq evo n400c (ES1988). Just one thing
> remains unsolved - the 2 nice volume control buttons that seem to be wired
> directly to the ES1988 won't work until now. 
> 
> I'm relatively new to linux and not a driver programmer, but scrolling
> through the documentation of the chip & the driver source quickly revealed
> that the volume can be controlled directly by two buttons, but the driver
> doesn't seem make use of that. 
> 
> Can anybody give me a hint how to use/enable the hardware volume control on
> that chip? Is a major rewrite of the driver required? Maybe some other
> driver could do that? The es1968 seems to support hw vol, might that driver
> run also on the ES1988?

The problem is -- we don't know.  We have no proper datasheet for this
chip...


Takashi


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AW: maestro3 hardware volume control

[Rüdiger Dabelow]

> Von: Takashi Iwai
> Gesendet: Dienstag, 19. April 2005 11:50
> Betreff: Re: [Alsa-devel] maestro3 hardware volume control
> 
> At Mon, 18 Apr 2005 15:22:58 +0200,
> rwd wrote:
> > 
> > Hi,
> > 
> > the maestro3 runs fine on my compaq evo n400c (ES1988). 
> Just one thing
> > remains unsolved - the 2 nice volume control buttons that 
> seem to be wired
> > directly to the ES1988 won't work until now. 
> > 
> > I'm relatively new to linux and not a driver programmer, 
> but scrolling
> > through the documentation of the chip & the driver source 
> quickly revealed
> > that the volume can be controlled directly by two buttons, 
> but the driver
> > doesn't seem make use of that. 
> > 
> > Can anybody give me a hint how to use/enable the hardware 
> volume control on
> > that chip? Is a major rewrite of the driver required? Maybe 
> some other
> > driver could do that? The es1968 seems to support hw vol, 
> might that driver
> > run also on the ES1988?
> 
> The problem is -- we don't know.  We have no proper datasheet for this
> chip...
> 
> 
> Takashi

Hi,
Sorry, don't understand:

the driver es1968.c enables and uses 

#define HWV_CONFB		0x0080
w |= HWV_CONFB;		/* HWV on */
pci_write_config_word(pci, ESM_CONFIG_B, w);

and handles the irq. The es1968.c driver handles the Maestro-2, does it?
http://www.alsa-project.org/alsa/ftp/manuals/ess/DSMaestro2.pdf

Same registers as described in the datasheet for the
ES1988/Allegro/Maestro-3
http://www.alsa-project.org/alsa/ftp/manuals/ess/ds1988.pdf

What info is missing? 

Ruediger




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Re: AW: maestro3 hardware volume control

[Takashi Iwai]

At Tue, 19 Apr 2005 12:55:00 +0200,
Rüdiger Dabelow wrote:
> 
> > Von: Takashi Iwai
> > Gesendet: Dienstag, 19. April 2005 11:50
> > Betreff: Re: [Alsa-devel] maestro3 hardware volume control
> > 
> > At Mon, 18 Apr 2005 15:22:58 +0200,
> > rwd wrote:
> > > 
> > > Hi,
> > > 
> > > the maestro3 runs fine on my compaq evo n400c (ES1988). 
> > Just one thing
> > > remains unsolved - the 2 nice volume control buttons that 
> > seem to be wired
> > > directly to the ES1988 won't work until now. 
> > > 
> > > I'm relatively new to linux and not a driver programmer, 
> > but scrolling
> > > through the documentation of the chip & the driver source 
> > quickly revealed
> > > that the volume can be controlled directly by two buttons, 
> > but the driver
> > > doesn't seem make use of that. 
> > > 
> > > Can anybody give me a hint how to use/enable the hardware 
> > volume control on
> > > that chip? Is a major rewrite of the driver required? Maybe 
> > some other
> > > driver could do that? The es1968 seems to support hw vol, 
> > might that driver
> > > run also on the ES1988?
> > 
> > The problem is -- we don't know.  We have no proper datasheet for this
> > chip...
> > 
> > 
> > Takashi
> 
> Hi,
> Sorry, don't understand:
> 
> the driver es1968.c enables and uses 
> 
> #define HWV_CONFB		0x0080
> w |= HWV_CONFB;		/* HWV on */
> pci_write_config_word(pci, ESM_CONFIG_B, w);
> 
> and handles the irq. The es1968.c driver handles the Maestro-2, does it?
> http://www.alsa-project.org/alsa/ftp/manuals/ess/DSMaestro2.pdf
> 
> Same registers as described in the datasheet for the
> ES1988/Allegro/Maestro-3
> http://www.alsa-project.org/alsa/ftp/manuals/ess/ds1988.pdf
> 
> What info is missing? 

The registers above didn't work at the last time we tried.
Feel free to debug it :)


Takashi


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maestro3 hardware volume control

[rwd]

> Von: alsa-devel-admin@lists.sourceforge.net 
> von Takashi Iwai
> Gesendet: Dienstag, 19. April 2005 14:00
> 
> The registers above didn't work at the last time we tried.
> Feel free to debug it :)
> 
> 
> Takashi
> 

Hi,

I tried to :)
Some findings:

I configured the PCI_ALLEGRO_CONFIG with additional  HV_CTRL_ENABLE |
HV_BUTTON_FROM_GD
to enable the HV according to the wiring of the buttons in my box.

snd_m3_interrupt constantly comes up with status 0x04 !?! What's that? Bad
docu - no info, as you said, any idea?
When i press a HV button, status changes to 0x44 -> HV interrupt pending!
Also you can see the HV registers SHADOW_MIX_REG_VOICE 0x1C etc. changing
when the buttons are pressed.
Looks like i'm almost there??

Still some questions:
- I tried to apply HV_INT_ENABLE to the HOST_INT_CTRL register. Box freezes
when i press a button - obviously an interrupt is fired & not handled
correctly - no idea how to do it. Is it required anyway? Buttons respond
even without HV_INT_ENABLE.

- status from snd_m3_interrupt is stuck to 0x44. Any way to clear/ack the
pending interrupts?

- now that i can read the buttons - what's the right way to change the
master/mixer/whatever volume (oops, i admit i'm a rookie...:) ?

Thanks, Ruediger



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Re: maestro3 hardware volume control

[Ville Syrjälä]

On Mon, Apr 18, 2005 at 03:22:58PM +0200, rwd wrote:
> Hi,
> 
> the maestro3 runs fine on my compaq evo n400c (ES1988). Just one thing
> remains unsolved - the 2 nice volume control buttons that seem to be wired
> directly to the ES1988 won't work until now. 

I just sent three patches that make the buttons work on my HP OmniBook 500 
and 6000 laptops.

-- 
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/


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