From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Spano Date: Sat, 23 Aug 2008 14:54:57 -0400 Subject: [Buildroot] ### ARM11 Buildroot for MX31 In-Reply-To: <6u80qt$757icq@rrcs-agw-02b.hrndva.rr.com> Message-ID: <000601c90551$bcde1290$1a01a8c0@flexeon32> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Hello I fixed my issue with Buildroot and here was my process for getting Buildroot to play with the MX31 board that I have 1) I started with the ltlib configuration from freescale and built a filesystem and kernel 2) I copied the kernel sources generated from #1 into its own directory so I can have a dedicated kernel source to work with. I then applied some changes in the kernel to work with my board. The changes I applied were to disable/comnment-out most of the MX31ADS related power management/etc. The board that I have is sort of like the LiteKit 31 but has some of the MX31 ADS features on it. This is kernel 2.6.22 with a lot of freescale patches that are not in the mainline kernel. 3) I then downloaded buildroot again today and did a make menuconfig 4) At #3, I changed the configuration to build a JFFS2 filesystem and target ARM11. I also change the MTD-UTILITIES to not build an MX31/ARM11 version of mkfs.jffs2. This kept giving me issues before looking for lzo1.h. I don't have any plans to build a filesystem image on the MX31, so I just need the mkfs.jffs2 on the my host PC. One thing I think here that may have been hanging me up before, was that this time - I set the option to "make all files owned by root". I didn't do this before and it appeared that this was the standard option set for the ext2 filesystem. 5) I kicked off a build of buildroot and let it generate the JFFS2 image. 6) After it was done, I went into the target/generic folder and changed the device_table.txt to add the following line (very important!) /dev/ttymxc c 660 0 0 207 16 0 1 4 This will build a /dev entry for the MX31 internal uarts which are called through the Freescale driver as ttymxc0 (1,2,3). The above line will give me a dev entry for major 207 minor 16 for ttymxc0 7) Then I went into the project build folder and into my root/etc MX31 filesystem. In the etc folder I changed the following files In inittab, add this line ttymxc0::respawn:/sbin/getty -L ttymxc0 115200 vt100 This will put a login prompt up on my UART#1 (or #0 - the first MX31 internal uart) In securtty, add these lines ttymcx0 ttymcx1 ttymcx2 ttymcx3 So all four internal MX31 uarts (I only use one right now) can allow a root login I flashed the JFFS2 filesystem into my NOR flash (the filesystem I built was 1.2Meg) and boot it up. I got a login prompt and used the standard username=root It took about 20-30 seconds after I hit enter and then I got my # prompt and I can access my linux now on my MX31. I am also using U-boot to boot linux which has been taken right for the u-boot git tree and built for the LiteKit31. I hacked u-boot a bit to account for my NOR flash (which is the same flash that's on the MX31ADS) a few other minor changes, such as working with the LAN9210 network port that I have. In a month or so, I would like to post a reference build for the MX31 platform on my company's website and include the u-boot, kernel, and buildroot system - for others who may want to do this. However, is there anyway a patch-set of some kind can be generated so that buildroot has a menu-option specifically for the MX31 and automatically implements the above (minor) changes. On to other issues now! Thanks Steve Spano, President Finger Lakes Engineering -----Original Message----- From: buildroot-bounces@uclibc.org [mailto:buildroot-bounces at uclibc.org] On Behalf Of steve at fl-eng.com Sent: Saturday, August 23, 2008 9:28 AM To: Peter Korsgaard Cc: buildroot at uclibc.org Subject: Re: [Buildroot] ### ARM11 Buildroot for MX31 HI Thanks for the reply. I will try the securetty file and add ttymxc0. The serial port drivers for the MX31 use ttymxc0 as their device ID. I was also thinking of changing the driver to use ttyS so it came up as a standard serial port driver because probably everything else may be thinking ttyS and not ttymxc. I had to add ttymxc and its major/minor number to the devices.txt file in the target/generic folder. I'll try some more tests and post results later today. Thanks for the reply! Steve > > From: Peter Korsgaard > Date: 2008/08/23 Sat AM 02:44:44 EST > To: > CC: > Subject: Re: [Buildroot] ### ARM11 Buildroot for MX31 > > >>>>> writes: > > Hi, > > > Hello I have downloaded the buildroot package and have built it for > > the ARM11 MX31 processor from Freescale. It is running with kernel > > 2.6.22 > > > Everything compiles and loads up, I can get a login prompt for > > username/password from the filesystem produced by buildroot. > > > However, I cannot seem to login. I assumed that the login would be > > "root" and no password. I looked into the /etc/passwd and > > /etc/shadow files which seemed to confirm that perhaps > > root(nopassword) and maybe user(user) was also a login. > > Yes, if you use the generic target skeleton (E.G. don't specify > anything special) you will have a root account without a password (but > no "user" account). > > From below it seems like you try to login over the serial port using a > ttymxc0 device. If so, then the reason why you cannot login is that > you don't have ttymxc0 listed in /etc/securetty. > > The file comes from target/generic/target_skeleton/etc, but you can > simply edit it under project_build_arm/uclibc/root/etc and rerun make > to regenerate your filesystem image. > > I don't see any mention of /dev/ttymxcN in Documentation/devices.txt > in the kernel sources? I take it that the serial driver isn't in the > mainline kernel? > > > THe other thing I tried to do was pass init=/dev/sh and > > init=/dev/bash to try to get a direct shell prompt. I don't think > > it was connecting to the MX31's serial port because I never saw any > > outputs after the filesystem was mounted. Is there a recommended > > way to force /dev/sh to appear on a ttyS0 (or actually ttymxc0 for > > the MX31) > > I take it you mean /bin/sh not /dev/sh? > > Strange. And you do get output from init and login with the same > filesystem if you boot without init=/bin/sh? > > -- > Bye, Peter Korsgaard > _______________________________________________ buildroot mailing list buildroot at uclibc.org http://busybox.net/mailman/listinfo/buildroot -- Internal Virus Database is out-of-date. Checked by AVG. Version: 7.5.524 / Virus Database: 270.6.0/1602 - Release Date: 8/9/2008 1:22 PM -------------- next part -------------- An HTML attachment was scrubbed... URL: http://busybox.net/lists/buildroot/attachments/20080823/e9992f47/attachment-0001.htm