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From: Achilleas Mantzios <achill@matrix.gatewaynet.com>
Organization: Dynacom Tankers Mgmt
To: Mark Tinguely <tinguely@casselton.net>
Date: Mon, 29 Oct 2007 09:48:35 +0300
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Cc: freebsd-multimedia@freebsd.org
Subject: Re: bktr and GPIO
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=CE=A3=CF=84=CE=B9=CF=82 =CE=A0=CE=B1=CF=81=CE=B1=CF=83=CE=BA=CE=B5=CF=85=
=CE=AE 26 =CE=9F=CE=BA=CF=84=CF=8E=CE=B2=CF=81=CE=B9=CE=BF=CF=82 2007 18:55=
, =CE=BF/=CE=B7 Mark Tinguely =CE=AD=CE=B3=CF=81=CE=B1=CF=88=CE=B5:
> <delete>
>
> >  In relation to bits assignments on LMLBT4M and LMLBT44 cards:
> >
> >  /* to allow access to GPIO bits for sensors input and
> >     alarms output
> >
> >     GPIObit    | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
> >     assignment | TI | O3|INx| O2| O1|IN4|IN3|IN2|IN1|   |   |
> >
> >     IN - sensor inputs, INx - sensor inputs and TI XORed together
> >     O1,O2,O3 - alarm outputs (relays)
> >
> >     GPIO bits should be enabled for outpus as follows:
> >
> >     OUT ENABLE   1    1   0  . 1  1   0   0 . 0   0   0    0   =3D3D 0x=
6C0
> >
> >  */
>
> In your user program after compiling/booting kernel with BKTR_GPIO_ACCESS,
> all you should need to do is:
>
> #define BKTR_ZONEMINDER_ALARM1 0x040
> #define BKTR_ZONEMINDER_ALARM2 0x080
> #define BKTR_ZONEMINDER_ALARM3 0x200
> 	int value;
> 	if (ioctl(tuner, BT848_GPIO_GET_EN, &value) < 0)
> 		error();
> 	value |=3D BKTR_ZONEMINDER_ALARM1; /* or other alarm */
> 	if (ioctl(tuner, BT848_GPIO_SET_EN, &value) < 0)
> 		error();
>
> error()
> {
>   perform some error routine and exit
> }

I was able to enable GPIO with =20
BT848_GPIO_SET_EN, and then write data to output and check the written value
with BT848_GPIO_SET_DATA, BT848_GPIO_GET_DATA.
Thanx.
>
> --Mark Tinguely

=2D-=20
Achilleas Mantzios