Re: GPIO on envy24ht M-Audio 192

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At Tue, 01 Aug 2006 13:45:36 -0400,
Cruise X Overide wrote:
> 
> On Tue, 2006-08-01 at 18:08 +0200, Takashi Iwai wrote:
> > At Mon, 31 Jul 2006 20:06:13 -0400,
> > Cruise X Overide wrote:
> > > 
> > > Ok, i got the wiring between between the vt1724 and the 3 dacs (AKMs)
> > > how do i code this into the driver, 
> > > is there any example, i looked at juli.c and i couldnt understand the 
> > > 
> > > /* GPIO Pins */
> > > 
> > > i was told that i only need to implement add_controls and init for this
> > > card?
> > 
> > There are different implementations with vt1724.
> > revo.c, aureon.c, pontis.c, prodigy192.c and phase.c are vt1724-based
> > boards using I2S transfer.  vt1720_mobo.c is for vt1724 with
> > ac97-codec.
> > 
> > The GPIO is usually controlled via snd_ice1712_gpio_write_bits() and
> > snd_ice1712_gpio_read().  See ice1712.h.
> > 
> > For AK codecs, there are some helper functions.  See
> > snd_ak4xxx_private in ice1712.h, too.
> > 
> > 
> > Takashi
> 
> after looking at the juli.c, raymond has explained to me the meaning of
> the values under the /* GPIO Pins */
> 
> 
> #define GPIO_ANAIN_MONITOR      (1<<13) 
> 
> i wanted to know wat the 13 means, and ray said it was the gpio pin.
> where do i find a table of gpio description (eg. AMAIN_MONITOR) and
> available definitions on the vt1724.

The GPIO pin assignment is the board specific implementation, so it's
nowhere described in VT1724 database, of course.  (If you have a
board, you can even trace the connection with loupe :)


Takashi

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