I am a newbie to Embedded linux and I am unable to get SCC4 working as my console device for my custom board. I am using Linux 2.4.24 from ELDK 3.0. U-boot works greats with SCC4 defined as my console device. I must use SCC4 as my console device because my board has no more pins left that I can use. In addition, I can not use the hardware handshaking pins as well. I only have the 2 wires - Rx and Tx available. I am using all 3 FCCs and using an SMC as a serial port is not an option due to its intensive FSM and drag on the CP.
I attemptted to boot linux but it traps at console_printk. After the trap, the SCC4 Registers look good to me so I guess the port has been initialized: GSMR_L4 00028034 Tx and Rx enabled GSMR_H4 00000020 PSMR4 B000 TODR4 8000 DSR4 7E7E SCCE4 0107 SCCM4 0000 SCCS4 03 The log_buf contains the following: ........ devfs: v1.12c (20020818) Richard Gooch (rgooch at atnf.csiro.au) devfs: boot_options: 0x1 CPU UART driver version 0.01 ttyS0 on SCC1 at 0x8000 BRG7 ttyS1 on SCC2 at 0x8100 BRG1 pty: 256 Unix98 ptys configured Serial driver version 5.05c (2001-07-08) with MANY_PORTS enabled Oops: kernel access of bad area, sig: 11 NIP: C00E8EF4 XER: 0000000 LR: C00ED804 SP: C039FE90 REGS: C039FDE0 TRAP:0300 Not tainted .... TASK= c039e000[1] 'swapper' Last syscall: 120 last math 00000000 last altivec 00000000 GPR0: ...... ....... Call backtrace: c0198e60 - console_printk c01b7e58 - early_serial_setup c01af63c - do_initcalls c01af684 - do_basic_setup c00039d0 - init c0008338 - arch_kernel_thread Kernel panic: Attempted to kill init! Rebooting in 180 seconds. A few seconds later the console terminal spews pages and pages of the following junk: [EMAIL PROTECTED]@ I'm using the uRamdisk (SELF) image found in ELDK 3.0 as my ram disk. My boot session and config files are attached Any suggestions on how I should preceed? Thanks in advance! Stan Partridge <<bootSession.txt>> <<ads8260-fs.config>> -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: bootSession.txt Url: http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20040429/029bc442/attachment.txt -------------- next part -------------- A non-text attachment was scrubbed... Name: ads8260-fs.config Type: application/octet-stream Size: 14011 bytes Desc: not available Url : http://ozlabs.org/pipermail/linuxppc-embedded/attachments/20040429/029bc442/attachment.obj
