From: "debora liu" <deboraliu@tom.com>
To: "denx" <wd@denx.de>
Cc: Linuxppc-embedded <Linuxppc-embedded@ozlabs.org>
Subject: mpc823 SCC3 flow control bug
Date: Thu, 8 Dec 2005 17:04:24 +0800 [thread overview]
Message-ID: <20051208102621.9AA8168890@ozlabs.org> (raw)
[-- Attachment #1: Type: text/plain, Size: 942 bytes --]
Hello denx:
I found one bug when SCC3 as UART, my cpu is mpc823.
cts/cd config as:
CTS PC5
CD PC4
your ELDK-3.1.1 linux-2.4.25 uart.c set pcpar,pcso, pcdir:
immap->im_ioport.iop_pcpar &= ~iobits;
immap->im_ioport.iop_pcso |= iobits;
immap->im_ioport.iop_pcdir &= ~iobits;
but MPC823UM tell me CD3 and CTS3 is bit6 and bit7 on PCSO register, so I modify:
fix_pcso = iobits;
#if defined(CONFIG_UART_CTS_CONTROL_SCC3)
fix_pcso &=~(1 << (15 - CONFIG_CTS3_PIN));
fix_pcso |= 0x0100;
#endif
#if defined(CONFIG_UART_CD_CONTROL_SCC3)
fix_pcso &=~(1 << (15 - CONFIG_CD3_PIN));
fix_pcso |= 0x0200;
#endif
immap->im_ioport.iop_pcpar &= ~iobits;
immap->im_ioport.iop_pcso |= fix_pcso;
immap->im_ioport.iop_pcdir &= ~iobits;
My board have success communication to moderm with SCC3 hard flow control.
debora liu
deboraliu@tom.com
2005-12-08
[-- Attachment #2: fox.gif --]
[-- Type: image/gif, Size: 9519 bytes --]
reply other threads:[~2005-12-08 10:26 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20051208102621.9AA8168890@ozlabs.org \
--to=deboraliu@tom.com \
--cc=Linuxppc-embedded@ozlabs.org \
--cc=wd@denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).