[LinuxBIOS] No console, yet... Ideas?

[Adam Talbot]

Console is working.  Fully tested. 
Post card... There are no PCI/ISA slots on this board, all I have is 1 
pc/104 slot and no jtag.  The superIO is controled by a via vt1211.  I 
think I have that part of my config correct. (see below) But I am not 
sure how to figure out the pnp address. 
-Adam

chip superio/via/vt1211
                                        device pnp 2e.2 on      #  Com1
                                           io 0x60 = 0x3f8
                                          irq 0x70 = 4
                                        end

Adam Talbot wrote:
> -Ron
> Well, I just got my code compiling.  But I have nothing on the 
> console.  What settings/files would you advise I check. Serial debug 
> is set at 9, but I am seeing nothing. Ideas?

First step: boot fuctory bios and make sure minicom works for you. Check 
settings on the chips under fuctory bios.

do you have a post card?

Beep won't work, I think, since no VSA in there yet.

do you have a POST card?

ron

[Richard Smith]

> pc/104 slot and no jtag.  The superIO is controled by a via vt1211.  I
> think I have that part of my config correct. (see below) But I am not
> sure how to figure out the pnp address.

Normally the superIO will have the address set in hardware by a pin
strapping.  Get the datasheet on the superIO and look at the options. 
Then verify by some simple IO testing to the data register.  You
should be able to write a value to the data register and then read it
back.

[Ronald G Minnich]

Adam Talbot wrote:
> Console is working.  Fully tested. 
> Post card... There are no PCI/ISA slots on this board, all I have is 1 
> pc/104 slot and no jtag.  The superIO is controled by a via vt1211.  I 
> think I have that part of my config correct. (see below) But I am not 
> sure how to figure out the pnp address. 
> -Adam
>
> chip superio/via/vt1211
>                                         device pnp 2e.2 on      #  Com1
>                                            io 0x60 = 0x3f8
>                                           irq 0x70 = 4
>                                         end
>
> Adam Talbot wrote:

as richard says:

main(){
    iopl(3);

inb(0x2e);

/* and print that out, see if it is 0xff */
    inb(0x4e); // or whatever

}

in other words, from a c program, just try to recreate what linuxbios 
does for I/o to superio, and see what works.

ron

[Adam Talbot]

I am missing an inclue or define statment...

3_5_proto#gcc test.c
/tmp/ccwX6c0l.o: In function `main':
test.c:(.text+0x24): undefined reference to `inb'
test.c:(.text+0x30): undefined reference to `inb'
collect2: ld returned 1 exit status

Ronald G Minnich wrote:
> Adam Talbot wrote:
> > Console is working.  Fully tested. Post card... There are no PCI/ISA 
> > slots on this board, all I have is 1 pc/104 slot and no jtag.  The 
> > superIO is controled by a via vt1211.  I think I have that part of my 
> > config correct. (see below) But I am not sure how to figure out the 
> > pnp address. -Adam
> >
> > chip superio/via/vt1211
> >                                         device pnp 2e.2 on      #  Com1
> >                                            io 0x60 = 0x3f8
> >                                           irq 0x70 = 4
> >                                         end
> >
> > Adam Talbot wrote:
>
> as richard says:
>
> main(){
>     iopl(3);
> inb(0x2e);
>
> /* and print that out, see if it is 0xff */
> inb(0x4e); // or whatever
>
> }
>
> in other words, from a c program, just try to recreate what linuxbios 
> does for I/o to superio, and see what works.
>
> ron

[Ronald G Minnich]

Adam Talbot wrote:
> I am missing an inclue or define statment...

oh, that code I sent is crap.

I did not know you wanted the full thing.

#include <stdio.h>
#include <asm/io.h>

main(){
    uchar c;

c = inb(0x2e);
    printf("c %02x\n", c);
}

be sure to cc -O2 or the damned asm junk won't get inlined, and you'll 
get link-time errors.

ron

[Richard Smith]

On 1/23/06, Adam Talbot  wrote:
> I am missing an inclue or define statment...
>
> 3_5_proto#gcc test.c
> /tmp/ccwX6c0l.o: In function `main':
> test.c:(.text+0x24): undefined reference to `inb'
> test.c:(.text+0x30): undefined reference to `inb'
> collect2: ld returned 1 exit status

#include <sys/io.h>

You also have to compile with -O or -O2 otherwise you will get link
errors.  IO is implemented as macros and they don't get linked in
unless optimizations are turned on.

[Adam Talbot]

-Ron
Just a guess.  uchar = unsigned char???
-Adam

Ronald G Minnich wrote:
> Adam Talbot wrote:
> > I am missing an inclue or define statment...
>
> oh, that code I sent is crap.
>
> I did not know you wanted the full thing.
>
> #include <stdio.h>
> #include <asm/io.h>
>
> main(){
>     uchar c;
> c = inb(0x2e);
> printf("c %02x\n", c);
>
> }
>
> be sure to cc -O2 or the damned asm junk won't get inlined, and you'll 
> get link-time errors.
>
> ron

[Adam Talbot]

-Ron
Little bug fix's and its working
# ./a.out
c ff

#include <stdio.h>
#include <asm/io.h>

main(){
        unsigned char c;
        ioperm(0x2E, 1, 1);

c = inb(0x2e);
        printf("c %02x\n", c);
}
-Adam

Adam Talbot wrote:
> -Ron
> Just a guess.  uchar = unsigned char???
> -Adam
>
> Ronald G Minnich wrote:
> > Adam Talbot wrote:
> > > I am missing an inclue or define statment...
> >
> > oh, that code I sent is crap.
> >
> > I did not know you wanted the full thing.
> >
> > #include <stdio.h>
> > #include <asm/io.h>
> >
> > main(){
> >    uchar c;
> >
> > c = inb(0x2e);
> >    printf("c %02x\n", c);
> > }
> >
> > be sure to cc -O2 or the damned asm junk won't get inlined, and you'll 
> > get link-time errors.
> >
> > ron

[Ronald G Minnich]

Adam Talbot wrote:
> -Ron
> Just a guess.  uchar = unsigned char???

yeah

ron

[Ronald G Minnich]

Adam Talbot wrote:
> -Ron
> Little bug fix's and its working
> # ./a.out
> c ff
>
> #include <stdio.h>
> #include <asm/io.h>
>
> main(){
>        unsigned char c;
>        ioperm(0x2E, 1, 1);

warning to all: iopl(3) is safer since on some arch's (most recently 
x86_64) ioperm won't do the right thing. just fyi.

ron