MPC8266ADS missing every other character on the console port; u-boot 0.3.0, eldk, kernel 2.4.4
C
sorex at cfl.rr.com
Wed May 28 06:18:55 EST 2003
I've checked for a solution to this problem here, the ppcboot-user's mailing
list, and Google but I haven't found my answer yet.
The following link chronicles the same behavior but the answers don't seem to apply.
http://lists.linuxppc.org/linuxppc-embedded/200203/msg00238.html
This thread from the ppcboot-users mailing is relevant as well.
http://www.geocrawler.com/mail/thread.php3?subject=%5BPpcboot-users%5D+Linux+console+messages+garbled&list=4205
The problem is that I'm missing every other character on the console port which
looks like this (captured using Tera Term Pro's log function):
>> ## Transferring control to Linux (at address 00000000) ...
>> tlmmr 6B sn 4Bfrhs al a 070)iu eso .. ro at y)(c eso .532001 peees/rno2001) 8
u a 71:12 D 03nnd oapgs 06oe0:49 ae.oe1:0pgs
>> zn() ae.enlcmadln:ro=dvrmr
>> Wrig eltm lc em tc
I'm using u-boot-0.3.0 which has CONFIG_CONS_ON_SCC defined as opposed to
CONFIG_CONS_ON_SMC. I presume the 'make MPC8266ADS_config' set that up.
I modified arch/ppc/8260_io/uart.c so that SCC1 corresponds with
CONFIG_SERIAL_CONSOLE_PORT. However, this did not fix the problem.
my rs_table looks like this:
>> #define CONFIG_SERIAL_CONSOLE_PORT 0
>>
>> .
>> .
>> .
>>
>> static struct serial_state rs_table[] = {
>> { 0, 0, PROFF_SCC1, SIU_INT_SCC1, 0, SCC_NUM_BASE + 0}, /* SCC1 ttyS 2 */
>> { 0, 0, PROFF_SCC2, SIU_INT_SCC2, 0, SCC_NUM_BASE + 1}, /* SCC2 ttyS 3 */
>> { 0, 0, PROFF_SCC3, SIU_INT_SCC3, 0, SCC_NUM_BASE + 2}, /* SCC3 ttyS 4 */
>> { 0, 0, PROFF_SCC4, SIU_INT_SCC4, 0, SCC_NUM_BASE + 3}, /* SCC4 ttyS 5 */
Can anyone shed some light on this issue?
Thank you,
Chris Gembarowski
Semper-Ubi-Sub-Ubi
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