From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ILEX5.IL.NDS.COM (jeru1.ndsisrael.com [192.118.34.248]) by ozlabs.org (Postfix) with ESMTP id D9842682FA for ; Fri, 23 Sep 2005 01:20:32 +1000 (EST) MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Date: Thu, 22 Sep 2005 18:20:26 +0300 Message-ID: <02AA386EB831044F8537A696BA785C780762A9@ILEX5.IL.NDS.COM> From: "Landau, Bracha" To: "Vitaly Bordug" , Subject: RE: using SCC4 on MPC8272ADS List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I am now using kernel 2.6.10.2 on the MPC8272ADS. I still have problems using the second SCC port (SCC4). If I do the following (assuming after configuring SCC4 to behave like SCC= 1 w/baud rate, etc using tcgetattr and tcsetattr): echo hello > hhh echo hello >> hhh echo hello >> hhh more hhh > /dev/ttyCPM1 then it works fine and I see the three lines of "hello" on the second por= t. But if I do: echo hello > hhh echo hello >> hhh more hhh > /dev/ttyCPM1 (i.e., only two lines of "hello" in hhh) then the system hangs. -----Original Message----- From: Vitaly Bordug [mailto:vbordug@ru.mvista.com] Sent: Wednesday, September 21, 2005 3:01 PM To: Landau, Bracha Subject: Re: using SCC4 on MPC8272ADS Landau, Bracha wrote: > Which version has the fix? 2-6-10-rc7? Where can I find it? http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.13.2.tar.bz2 2.6.13.rc7 should have the fix. >=20 > -----Original Message----- > From: Vitaly Bordug [mailto:vbordug@ru.mvista.com] > Sent: Wednesday, September 21, 2005 2:40 PM > To: Landau, Bracha > Cc: linuxppc-embedded list > Subject: Re: using SCC4 on MPC8272ADS >=20 >=20 > Landau, Bracha wrote: >=20 >>I reconfigured the kernel so that only SCC1 and SCC4 are supported. The= same thing happens as before. >>Another bit of info is that if I run with console=3DttyCPM1 as a kernel= command line parameter, so that u-boot outputs to one port and the kerne= l outputs to the other, if I type "ls > /dev/ttyCPM0" the system hangs. >> >=20 >=20 > Heh, didn't noticed, that you should use the latest rc of the linux=20 > kernel. I used to fix second UART in rc7 AFAIR. >=20 >>-----Original Message----- >>From: Vitaly Bordug [mailto:vbordug@ru.mvista.com] >>Sent: Wednesday, September 21, 2005 1:56 PM >>To: Landau, Bracha >>Cc: linuxppc-embedded@ozlabs.org >>Subject: Re: using SCC4 on MPC8272ADS >> >> >>Landau, Bracha wrote: >> >> >>>I am using the MPC8272ADS with kernel 2.6.10. The kernel is configured= to support 4 CPM SCCs, of which 1 and 4 are connected on the board. >>>I created device files as follows: >>> >>>mknod /dev/ttyCPM0 c 204 46 >>>mknod /dev/ttyCPM1 c 204 47 >>>mknod /dev/ttyCPM2 c 204 48 >>>mknod /dev/ttyCPM3 c 204 49 >>> >>>If I boot the kernel using console=3DttyCPM3 I see that it uses SCC4. = But when I boot with console=3DttyCPM0 and write to the second port using= a command like "echo hello > /dev/ttyCPM3" I don't see that anything is = being outputted to the second console. >>> >>>What am I doing wrong? >>> >> >>Funny - you said that SCC 1 and 4 are connected to the board; than why=20= >>you are enabling SCC2 and SCC3? >> >>This board does have 2 SCCs assigned for UARTs. No need to configure=20= >>SCC2 and SCC3 - this is useless and may lead to kernel crash. This boar= d=20 >>will use in the correct configuration /dev/ttyCPM0 and=20 >>/dev/ttyCPM1 . >> >> >> >=20 >=20 >=20 --=20 Sincerely, Vitaly *************************************************************************= ********** Information contained in this email message is intended only for use of t= he individual or entity named above. If the reader of this message is not= the intended recipient, or the employee or agent responsible to deliver = it to the intended recipient, you are hereby notified that any disseminat= ion, distribution or copying of this communication is strictly prohibited= =2E If you have received this communication in error, please immediately = notify the postmaster@nds.com and destroy the original message. *************************************************************************= **********