Date: Sun, 4 Feb 2007 22:41:57 +0100 From: Milan Obuch <freebsd-hackers@dino.sk> To: freebsd-hackers@freebsd.org Subject: Re: Geode SC1100 i2c bus Message-ID: <200702042241.58481.freebsd-hackers@dino.sk> In-Reply-To: <20072422241.046491@poppa> References: <20072422241.046491@poppa>
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On Sunday 04 February 2007 22:24, Cats wrote:
> I played a bit today with Geode registers.
>
> Well, I tried to tweak the /usr/src/sys/i386/i386/geode.c
>
> *** 198,203 ****
> --- 198,207 ----
> * people think their box just died.
> */
> led_func(&led1b, 1);
> + outb(0x2E,0x7); // Select LDN Page 80
> + outb(0x2F,0x2); // Put 02h in LDN to select IR Port
> + outb(0x2E,0x30); // Select Logical Device Control
> Register + outb(0x2F,inb (0x2F)+1); // Set LDCR[0] to
> enable IR port }
> if ( strlen(bios_oem) )
> printf("Geode %s\n", bios_oem);
>
> After rebooting with the new kernel I got this in the dmesg:
>
> sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
> sio0: type 16550A, console
> sio1: configured irq 3 not in bitmap of probed irqs 0
> sio1: port may not be enabled
> sio1 at port 0x2f8-0x2ff irq 3 on isa0
> sio1: type 16550A
>
> Yes, the IR port is seen as a standard serial port and I have the cuad1*
> and ttyd1* in the /dev
>
> Well of course none of IRRCX1 and IRTX pins are wired on the wrap board, so
> no way to test it.
>
> This might be a trick to enable the ACBbuses on the geode to have them
> recognized by a driver on the isa bus.
>
> Got to try when I'll have some spare time.
>
It will not work, there is much more to do. As shown in your test, even second
serial will not work because irq routing is not set. But I will try to
analyze Pascal's sources and compare it to my older work, maybe I can find
the problem, just wait a bit... I will keep you informed if I achieve any
progress...
Milan
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