From owner-freebsd-mobile  Mon May 14  8:41: 6 2001
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Date: Mon, 14 May 2001 11:40:39 -0400
From: JT <luser@ahab.com>
To: Richard Tobin <richard@cogsci.ed.ac.uk>
Cc: freebsd-mobile@freebsd.org
Subject: Re: Sony Z600-HEK - un-recommendation
Message-ID: <20010514114039.E345@zed.unbeat.com>
Mail-Followup-To: Richard Tobin <richard@cogsci.ed.ac.uk>,
	freebsd-mobile@freebsd.org
References: <200105081353.OAA24182@rhymer.cogsci.ed.ac.uk>
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In-Reply-To: <200105081353.OAA24182@rhymer.cogsci.ed.ac.uk>; from richard@cogsci.ed.ac.uk on Tue, May 08, 2001 at 02:53:42PM +0100
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It does work on the Vaio PCG-Z505LS

Obviously it's a proof of concept, so just for the record: it
currently sets modulus 255; no argument cores it.

Thanks! I was afraid to dump windows for this reason alone!  I've had
one or two crashes (well, I ran out of power) that dimmed the
brightness afterwards.

Somewhere else in this thread Warner Losh mentions tweaking the
brightness before/after suspend - that's really a great idea for
getting a little extra power saving!

On Tue, May 08, 2001 at 02:53:42PM +0100, Richard Tobin wrote:
> > 1. Screen brightess - Only works under windows.
> 
> Here is a program to set the brightness under FreeBSD.  0 seems to be
> full brightness, 255 minimum.  You'll have to be root to run it.  It's
> based on a Linux program.
> 
> -- Richard
> 
> /* Set brightness of Vaio screen.  Tested on Z600-TEK. */
> /* Based on http://us1.samba.org/ftp/unpacked/picturebook/setbrightness.c */
> 
> #include <stdio.h>
> #include <unistd.h>
> #include <fcntl.h>
> #include <machine/cpufunc.h>
> 
> #define DATA_REG 0x62
> #define CST_REG  0x66
> 
> typedef unsigned short u16;
> 
> static void ecr_set(u16 addr, u16 value)
> {
>         while (inw(CST_REG) & 3) usleep(1);
>         outw(CST_REG, 0x81);
>         while (inw(CST_REG) & 2) usleep(1);
>         outw(DATA_REG, addr);
>         while (inw(CST_REG) & 2) usleep(1);
>         outw(DATA_REG, value);
>         while (inw(CST_REG) & 2) usleep(1);
> }
> 
> static u16 ecr_get(u16 addr)
> {
>         while (inw(CST_REG) & 3) usleep(1);
>         outb(CST_REG, 0x80);
>         while (inw(CST_REG) & 2) usleep(1);
>         outb(DATA_REG, addr);
>         while (inw(CST_REG) & 2) usleep(1);
>         return inw(DATA_REG);
> }
> 
> int main(int argc, char *argv[])
> {
>     if(open("/dev/io", O_RDWR, 0) < 0)
>     {
> 	perror("/dev/io");
> 	return 1;
>     }
>     printf("currently %x\n", ecr_get(0x96));
>     ecr_set(0x96, atoi(argv[1]));
>     return 0;
> }
> 
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-- 
-------------------------------------------------------------------
                            Jason Thaxter
                         Flashlight Media, Inc.
                       jason@flashlightmedia.com
                        www.flashlightmedia.com
                           (212) 334-9378
-------------------------------------------------------------------


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