MBX860 serial on J19?

MBX860 serial on J19?

[bgat]

Hi!


I have a stock Motorola MBX860 board, and I'm trying to use the serial
ports connected to the Utility #2 connector, J19.  These ports are
connected to the SMSC 37c672.

In short, nothing is working.  I'm using the kernel that comes with
the Red Hat Embedded DevKit, which appears to be a modestly-modified
2.2.13.

I'm in the process of trying out the MontaVista HHL 2.2.14 kernel as I
write this.

I think I must be missing something obvious, because the SMSC chip is
used in a lot of PCs and is therefore probably well supported...

Any thoughts or suggestions would be much appreciated.

I'm mounting my root directory via NFS, and I have this in /dev:

crwxrwx---   1 root     root       5,   1 Dec  4 13:53 console
crwxrwx---   1 root     root       6,   0 Dec  4 15:54 lp0
crwxrwx---   1 root     root       1,   3 Dec  4 13:53 null
crwxrwx---   1 root     root      99,   0 Dec  4 13:54 parport0
brwxrwx---   1 root     root       1,   1 Dec  4 13:53 ram
crw-r--r--   1 root     root       4,  64 Dec  5 14:13 ttyS00
crw-r--r--   1 root     root       4,  65 Dec  5 14:13 ttyS01
crw-r--r--   1 root     root       4,  66 Dec  5 14:13 ttyS02
crwxrwx---   1 root     root       1,   5 Dec  4 13:53 zero

When I boot, my console (SMC1/COM1) looks like this:

Bytes Received =&444278, Bytes Loaded =&444278
Bytes/Second   =&222139, Elapsed Time =2 Second(s)
loaded at:     00210000 00204AA4
relocated to:  00100000 000F4AA4
board data at: 003F4570 003F4598
relocated to:  00200100 00200128
zimage at:     00216000 0026B457
avail ram:     0026C000 00400000

Linux/PPC load: init=/sbin/sash
Uncompressing Linux...done.
Now booting the kernel
Linux version 2.2.13 (bgat@sol) (gcc version 2.9-edk-000221) #1
Tue Dec 5 15:1900
time_init: decrementer frequency = 187500000/60
Calibrating delay loop... 49.77 BogoMIPS

Memory: 3148k available (652k kernel code, 296k data, 0k init)
[c0000000,c04000]
DENTRY hash table entries: 262144 (order: 9, 2097152 bytes)
Buffer-cache hash table entries: 32768 (order: 5, 131072 bytes)
Page-cache hash table entries: 1024 (order: 0, 4096 bytes)
POSIX conformance testing by UNIFIX
Linux NET4.0 for Linux 2.2
Based upon Swansea University Computer Society NET3.039
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
TCP: Hash tables configured (ehash 4096 bhash 4096)
Starting kswapd v 1.5
Serial driver version 4.27 with no serial options enabled
ttyS00 at 0x03f8 (irq = 4) is a 16450
ttyS01 at 0x02f8 (irq = 3) is a 16450
ttyS02 at 0x03e8 (irq = 4) is a 16450
CPM UART driver version 0.02
ttyS00 at 0x0280 is a SMC
ttyS01 at 0x0100 is a SCC
ttyS02 at 0x0200 is a SCC
pty: 256 Unix98 ptys configured
RAM disk driver initialized:  16 RAM disks of 4096K size
eth0: CPM ENET Version 0.2, 00:01:af:02:7a:22
Sending BOOTP requests.... OK
IP-Config: Got BOOTP answer from 192.168.2.11, my address is 192.168.2.2
IP-Config: Cannot add default route (-101).
Looking up port of RPC 100003/2 on 192.168.2.11
Looking up port of RPC 100005/1 on 192.168.2.11
VFS: Mounted root (NFS filesystem) readonly.

...

Thanks!


b.g.
--
Bill Gatliff
bgat@open-widgets.com

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: MBX860 serial on J19?

[Dan Malek]

bgat@open-widgets.com wrote:

> I have a stock Motorola MBX860 board, and I'm trying to use the serial
> ports connected to the Utility #2 connector, J19.  These ports are
> connected to the SMSC 37c672.
>
> In short, nothing is working.

That's because there isn't any software for them.  The short answer
is the MPC8xx parts have an internal interrupt controller and the CPM
which provides serial ports.  The rest of the kernel assumes PC-style
interrupt controllers and serial ports are the only things that exist.
Making these co-exist required changes in the generic parts of the
kernel that were never acceptable, so I simply ignore that hardware
on these boards.  There are probably some hacks floating around that
will enable more or less of these features (like the IDE, flopply,
parallel port, and the serial ports), but nothing that anyone
has ever sent me as a contribution that was acceptable.

> I'm in the process of trying out the MontaVista HHL 2.2.14 kernel as I
> write this.

Same thing, only better.

> I think I must be missing something obvious, because the SMSC chip is
> used in a lot of PCs and is therefore probably well supported...

Well supported in a PC.  This isn't a PC.


	-- Dan

** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

Re: MBX860 serial on J19?

[bgat]

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Dan:

> > I have a stock Motorola MBX860 board, and I'm trying to use the serial
> > ports connected to the Utility #2 connector, J19.  These ports are
> > connected to the SMSC 37c672.
> > 
> > In short, nothing is working.
> 
> That's because there isn't any software for them.

I figured that.  I looked at a lot of code before posting my question,
I was hoping that I was just missing something or that the MBX860
looked more like a PC than I thought it did.  Not having schematics is
a real problem here.

Incidentally, I'm not all that happy with the MBX anyway.  Just add
this to the list...


Thanks for the help.


b.g.
-- 
Bill Gatliff
bgat@open-widgets.com

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