[Ppcboot-users] Re: ISA SIO Problems

[James F D. <jfd@GigabitNetworks.COM>]

On Mon, 30 Jul 2001 09:22:02 -0700 Tom Rini wrote:

> 
> On Mon, Jul 30, 2001 at 09:14:24AM -0700, Mark A. Greer wrote:
> > Tom Rini wrote:
> >
> > > On Sat, Jul 28, 2001 at 04:54:19PM -0700, James F Dougherty wrote:
> > > Okay, the more portable way would be to:
> > > 1) edit include/asm-ppc/serial.h, and Yet Another #elif
> > > 2) Make include/asm-ppc/mousse_serial.h, which has something like:
> > > #define STD_SERIAL_PORT_DFNS
> > >  {0, 9600, MOUSSE_SERIAL_0, 4, STD_COM_FLAGS, PORT_8250, \
> > >         io_base: (u8 *) SERIAL_MOUSE_0 \
> > >         io_type: SERIAL_IO_MEM
> >
> > I think that should be: "iomem_base: (u8 *)SERIAL_MOUSE_0"
> >                          ^^^^^^^^^^
> 
> Ya, oops.  That's what I get for doing it out of memory :)  SERIAL_MOUSSE_0,
> even too :)


Done!

Thanks Mark, Thanks Tom,

Actually, it turned out to be a simple bug where serial get/set
reg were doing the wrong thing (simply reading from the base instead
of base + offset). One of the glorious bugs one sometimes introduces
with ifdef hacking :-)

When I fixed this, I immediately got console garbage (DLL value wrong for baud),
so I hard-coded the com1 uart baud to 9600 as a temporary hack.

Anyhow, now it works ... the 8250 SIO detection thing should have been 
a dead giveaway, but since UART TX/RX registers are at the same offset (0),
the console driver would print fine, but not receive .... I thought it was
flow control at first, then the driver ... many thanks for the sanity check :-)

On the baud mismatch, I found out that my system uses a 14.3Mhz UART crystal, 
so the baud rates should change. Is there a clean way to change a #define, or
should I define my own baud2code/code2baud translation routines. What is the
cleanest way todo this?

Also, has anyone gotten a Bogomips rating for a 200Mhz MPC8240 with 66Mhz
SDRAM?  Mine says 133.12, perhaps my calibrate_decr is broken? Could my
cache be disabled? 

Thoughts?

Many thanks again for all your help.


			-James
		
Linux version 2.4.2_hhl20 (jfd@atlantis) (gcc version 2.95.2 19991024 (release)) 
#409 Mon Jul 30 09:09:32 PDT 2001
cpu0: MPC8240/KAHLUA : MOUSSE Platform : 64MB RAM: MPLD Rev.  1
Sandpoint port (C) 2000, 2001 MontaVista Software, Inc. (so...@mv...)
NVRAM: 802.3 Ethernet Address=<0:0:10:20:30:44>
NVRAM: mousse.gigabitnetworks.com: eth0 IP configured via DHCP
On node 0 totalpages: 16384
zone(0): 16384 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: console=ttyS0,9600 
time_init: decrementer frequency = 16.665955 MHz
time_init: MPC8240 PCI Bus frequency = 33.331910 MHz
Calibrating delay loop... 133.12 BogoMIPS
Memory: 62588k available (1212k kernel code, 476k data, 84k init, 0k highmem)
Dentry-cache hash table entries: 8192 (order: 4, 65536 bytes)
Buffer-cache hash table entries: 4096 (order: 2, 16384 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 bytes)
Inode-cache hash table entries: 4096 (order: 3, 32768 bytes)
POSIX conformance testing by UNIFIX
PCI: Probing PCI hardware
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039
Initializing RT netlink socket
Starting kswapd v1.8
pty: 256 Unix98 ptys configured
block: queued sectors max/low 41522kB/13840kB, 128 slots per queue
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
Uniform Multi-Platform E-IDE driver Revision: 6.31
ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
loop: loaded (max 8 devices)
Serial driver version 5.02 (2000-08-09) with MANY_PORTS SHARE_IRQ SERIAL_PCI 
enabled
ttyS00 at 0xffe08080 (irq = 4) is a ST16650
Linux Tulip driver version 0.9.13a (January 20, 2001)
eth0: Digital DS21143 Tulip rev 65 at 0xbfff80, EEPROM not present, 
00:00:10:20:30:44, IRQ 1.
eth0:  MII transceiver #0 config 3000 status 7829 advertising 01e1.
NET4: Linux TCP/IP 1.0 for NET4.0
IP Protocols: ICMP, UDP, TCP
IP: routing cache hash table of 512 buckets, 4Kbytes
TCP: Hash tables configured (established 4096 bind 4096)
NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
VFS: Mounted root (nfs filesystem).
Freeing unused kernel memory: 84k init 4k openfirmware
init-2.03# 
eth0: Setting full-duplex based on MII#0 link partner capability of 45e1.
init-2.03# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/root              6157677   3629626   2466475   0% /
init-2.03# ls
bin  dev  etc  lib  lost+found  opt  proc  sbin  tmp  usr
init-2.03# mount -t proc proc /proc
init-2.03# cat /proc/cpuinfo
processor       : 0
cpu             : 82xx
revision        : 1.1 (pvr 0081 0101)
bogomips        : 133.12
zero pages      : total: 0 (0Kb) current: 0 (0Kb) hits: 0/0 (0%)
vendor          : Motorola
machine         : MPC8240/MOUSSE
processor       : PVID: 0x810101, vendor: Motorola
init-2.03# cat /proc/interrupts 
           CPU0       
  1:       2409   MPC8240 EPIC   Level     eth0
  4:       1546   MPC8240 EPIC   Level     serial
BAD:          0
init-2.03#