RE: PCMCIA Modem/Serial Cards and MPC8xx?

Steve,

I am not at my desk but can tell you that you will have to change the
options for serial driver.  I have use the PCMCIA for serial ports but I
have setup both the MPC8xx uarts and a standard 16550 uart chip to work in
the same Linux kernel.  from the look of your kernel output you have not
emabled any serial options so your driver is looking for a build in 16550
and failing to find one.  there is a file in <kernel root>/include/asm
called serial.h this fle contains the devines for the serial ports used
butthe kernel.  There are not used by the MPC8xx uart driver. You are going
to have to figure out what you want to definein there for your PCMCIA serial
port.
I hoe this helps you.

Regards,
Rod Boyce

-----Original Message-----
From: Steven Scholz
To: LinuxPPC
Sent: 8/26/2003 10:40 PM
Subject: PCMCIA Modem/Serial Cards and MPC8xx?


Hi there,

is someone using a PCMCIA Modem or Serial Port card with an MPC8xx
system?

I build a kernel for a TQM860L based board enabeling CONFIG_SERIAL=y
as the PCMCIA HowTo states. (I also have CONFIG_SERIAL_CONSOLE=y). But
while booting (or insmod serial.o) I get :

CPM UART driver version 0.04
ttyS0 on SMC1 at 0x0280, BRG1
ttyS1 on SMC2 at 0x0380, BRG2
pty: 256 Unix98 ptys configured
Serial driver version 5.05c (2001-07-08) with no serial options enabled
Oops: kernel access of bad area, sig: 11
NIP: C009FA6C XER: 00000000 LR: C00A4174 SP: C01D7E80 REGS: c01d7dd0
TRAP: 0300    Not tainted
MSR: 00001032 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 800003F9, DSISR: 00000469
TASK = c01d6000[1] 'swapper' Last syscall: 120
last math 00000000 last altivec 00000000
GPR00: 00000000 C01D7E80 C01D6000 C01D7E88 00000001 00000000 C01CC3D8
000003F8
GPR08: 00000000 800003F9 00000000 00000000 00000001 100B0020 C00A37C8
C00A301C
GPR16: C00A1B68 C00A2834 C00A3138 C009FC10 C009FB84 C00A2CAC C00A1C38
C00A1BB0
GPR24: C00A28BC C00A1AE8 C00A1AD0 C0151FD8 C0151FD8 C017C130 C017C1F4
C01D7E88
Call backtrace:
C000FE44 C0161A00 C015B588 C015B5D0 C000227C C0004BA0
Kernel panic: Attempted to kill init!

Backtrace is:
0xc000fe44 -- 0xc000fd78 + 0x00cc   release_console_sem
0xc0161a00 -- 0xc0161630 + 0x03d0   rs_init
0xc015b588 -- 0xc015b558 + 0x0030   do_initcalls
0xc015b5d0 -- 0xc015b5a8 + 0x0028   do_basic_setup
0xc000227c -- 0xc0002268 + 0x0014   init
0xc0004ba0 -- 0xc0004b74 + 0x002c   kernel_thread

Any ideas?

Thanks a million!

Steven


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

Rod,

Thanks for your reply.

I am not at my desk but can tell you that you will have to change the
options for serial driver.  I have use the PCMCIA for serial ports but I
have setup both the MPC8xx uarts and a standard 16550 uart chip to work in
the same Linux kernel.

Could you please give my a pointer how you did that?
Did you have MPC8xx uarts _and_ a standard 16550 uart _and_ PCMCIA?

 from the look of your kernel output you have not
emabled any serial options so your driver is looking for a build in 16550
and failing to find one.

Hmm. But even if I define one. The kernel won't find a UART if it's on
PCMCIA since PCMCIA is started much later... ?

there is a file in <kernel root>/include/asm
called serial.h this fle contains the devines for the serial ports used
butthe kernel.  There are not used by the MPC8xx uart driver. You are going
to have to figure out what you want to definein there for your PCMCIA serial
port.

Any hints?

Thanks,

Steven


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