From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3ED61379.10401@cfl.rr.com> Date: Thu, 29 May 2003 10:04:41 -0400 From: C MIME-Version: 1.0 To: C Cc: linuxppc-embedded@lists.linuxppc.org Subject: Re: MPC8266ADS missing every other character on the console port; u-boot 0.3.0, eldk, kernel 2.4.4 References: <3ED3C82F.30402@cfl.rr.com> In-Reply-To: <3ED3C82F.30402@cfl.rr.com> Content-Type: text/plain; charset=us-ascii; format=flowed Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: I have solved the problem. In accordance with proper netiquette I am posting my solution. > 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 The answers are out there but they may not be exactly what you're looking for. The following post to the linuxppc-embedded list didn't address my problem directly but it does hold the answer: http://lists.linuxppc.org/linuxppc-embedded/200304/msg00103.html Form my MPC8266ADS board the answer is to not use the 2.4.4 kernel but to use the development branch (2.4.devel) of the kernel. The reset of this email tells you how to download the development kernel, configure, compile, and generate a u-boot image. If you're not a newbie like me and know how to do all this don't waste your time by reading on. This link will tell you how to download the kernel via BitKeeper: http://www.penguinppc.org/dev/kernel.shtml "cd" to the directory you downloaded the source tree to and then copy the source files from the SCCS repository. # cd # bk -r get Edit the makefile in the base directory so that: ARCH := ppc CROSS_COMPILE = ppc_82xx- Next get the default configuration for the MPC8266ADS # make ads8266_config Prune things from the configuration that don't make sense for your application: # make menuconfig Now it's time to compile: # make oldconfig # make dep # make bzImage Create a U-boot (ppcboot) image from the bzImage with mkimage: # cd arch/ppc/boot/images/ # mkimage -A ppc \ -O linux \ -T kernel \ -C gzip \ -a 0 \ -e 0 \ -n "" \ -d vmlinux.gz \ pImage Place your pImage on your tftpserver and download it to your board: U-Boot 0.3.0 (May 21 2003 - 12:15:52) MPC8260 Reset Status: External Soft, External Hard MPC8260 Clock Configuration - Bus-to-Core Mult 3x, VCO Div 2, 60x Bus Freq 33-100, Core Freq 100-300 - dfbrg 0, corecnf 0x08, busdf 3, cpmdf 1, plldf 0, pllmf 1 - vco_out 266666664, scc_clk 66666666, brg_clk 66666666 - cpu_clk 199999998, cpm_clk 133333332, bus_clk 66666666 CPU: MPC8260 (Rev 14, Mask A.0(A) 2K25A) at 199.999 MHz Board: Motorola MPC8266ADS I2C: ready DRAM: SDRAM configuration read from SPD Size per side = 16MB Organization: 1 sides, 2 banks, 9 Columns, 11 Rows, Data width = 64 bits Refresh rate = 16, CAS latency = 3 Total size: 16 MB Top of RAM usable for U-Boot at: 01000000 Reserving 256k for U-Boot at: 00fc0000 Reserving 384k for malloc() at: 00f60000 Reserving 76 Bytes for Board Info at: 00f5ffb4 Reserving 68 Bytes for Global Data at: 00f5ff70 Stack Pointer at: 00f5ff58 New Stack Pointer is: 00f5ff58 FLASH: 8 MB In: serial Out: serial Err: serial Reset Ethernet PHY U-Boot relocated to 00fc0000 Net: FCC2 ETHERNET ### main_loop entered: bootdelay=5 ### main_loop: bootcmd="tftpboot; bootm" Hit any key to stop autoboot: 5 Hit a key to stop the autoboot process. Then command u-boot to download the pImage. => tftp 0x100000 pImage Trying FCC2 ETHERNET ARP broadcast 1 Got good ARP - start TFTP TFTP from server 216.132.201.40; our IP address is 216.132.201.68 Filename 'pImage'. Load address: 0x100000 Loading: *################################################################# ######################################## done Bytes transferred = 536001 (82dc1 hex) Now make sure that clocks_in_mhz is NOT DEFINED! I know that you will find at least one post from Wolfgang Denx on this list that refers to this. Undefine clocks_in_mhz this way: => setenv clocks_in_mhz => saveenv Now all you have to do is boot the kernel and watch the characters stream by: => bootm ## Booting image at 00100000 ... Image Name: foo Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 535937 Bytes = 523.4 kB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Uncompressing Kernel Image ... OK ## Current stack ends at 0x00F5FBE8 => set upper limit to 0x00800000 ## cmdline at 0x007FFF00 ... 0x007FFF10 bd address = 0x00F5FFB4 memstart = 0x00000000 memsize = 0x01000000 flashstart = 0xFF800000 flashsize = 0x00800000 flashoffset = 0x00000000 sramstart = 0x00000000 sramsize = 0x00000000 immr_base = 0xF0000000 bootflags = 0x00000001 vco = 266.666 MHz sccfreq = 66.666 MHz brgfreq = 66.666 MHz intfreq = 199.999 MHz cpmfreq = 133.333 MHz busfreq = 66.666 MHz ethaddr = AE:CF:02:00:00:00 IP addr = 216.132.201.68 baudrate = 9600 bps No initrd ## Transferring control to Linux (at address 00000000) ... Memory BAT mapping: BAT2=16Mb, BAT3=0Mb, residual: 0M Linux version 2.4.21-rc5 (root@yyz) (gcc version 2.95.3 20010111 (prerelease/franzo/20010111)) #28 Wed May 28 17:58:36 EDT 200 On node 0 totalpages: 409 zone(0): 4096 pages zone(1): 0 pages zone(2): 0 pages Kernel command line: root=/dev/ram r . . . ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/