Dear Rob, Thanks for your help. So to answer your question of where I added the 8250 kernel parameters, that would be in /etc/default/grub file in the GRUB_CMDLINE_LINUX variable.
With your hints I was now able to find out that somehow my machine (a Soekris net6501-30 board) has one console serial port and 4 additional unused (no cables or plugs) serial ports. So this means I had to use the "13" parameter to the 8250.runtime_uarts and 8250.nr_uarts kernel boot config options. Now I can see all my ports but the order is somehow mixed up :( have a look here at the output of /proc/tty/driver/serial : 0: uart:TI16750 port:000003F8 irq:4 tx:2608 rx:0 RTS|DTR 1: uart:16C950/954 mmio:0xA5001A00 irq:19 tx:11 rx:0 RTS|DTR 2: uart:16C950/954 mmio:0xA5001C00 irq:19 tx:0 rx:0 3: uart:16C950/954 mmio:0xA5001E00 irq:19 tx:0 rx:0 4: uart:16550A port:00001040 irq:19 tx:0 rx:0 5: uart:16550A port:00001048 irq:19 tx:0 rx:0 6: uart:16550A port:00001050 irq:19 tx:0 rx:0 7: uart:16550A port:00001058 irq:19 tx:0 rx:0 8: uart:16C950/954 mmio:0xA5001000 irq:19 tx:0 rx:0 9: uart:16C950/954 mmio:0xA5001200 irq:19 tx:0 rx:0 10: uart:16C950/954 mmio:0xA5001400 irq:19 tx:0 rx:0 11: uart:16C950/954 mmio:0xA5001600 irq:19 tx:0 rx:0 12: uart:16C950/954 mmio:0xA5001800 irq:19 tx:0 rx:0 So 0 is the serial console port (ttyS0) then 1-3 are 3 ports of my serial card, 4-7 are then 4 serial ports from the net6501-30 mainboard and finally 8-12 are the rest 5 ports of my serial port card. As you can see it's a big mess and I don't understand how my 8 port serial card gets splitted like that. Any clues how to bring some order here? Best regards, M.L. ----- Original Message ----- From: Rob van der Putten <r...@sput.nl> To: debian-user@lists.debian.org Cc: Sent: Thursday, April 25, 2013 1:39 PM Subject: Re: 8 port serial PCI card on squeeze Hi there ML mail wrote: > I am trying to configure an 8 port serial PCI card and managed to get the 3 > first ports working but the 5 others do not work. The ouput of > /proc/tty/drivers/serial is the following: > > 0: uart:TI16750 port:000003F8 irq:4 tx:2608 rx:0 RTS|CTS|DTR|DSR > 1: uart:16C950/954 mmio:0xA5001000 irq:19 tx:0 rx:0 > 2: uart:16C950/954 mmio:0xA5001200 irq:19 tx:0 rx:0 > 3: uart:16C950/954 mmio:0xA5001400 irq:19 tx:0 rx:0 That's 4 working ports. Which is the default. > 4: uart:16550A port:00001040 irq:19 tx:11 rx:0 RTS|DTR > 5: uart:16550A port:00001048 irq:19 tx:0 rx:0 > 6: uart:16550A port:00001050 irq:19 tx:0 rx:0 > > 7: uart:16550A port:00001058 irq:19 tx:0 rx:0 > > > serial port 0 is the serial port of the main board then the serial port card > starts at position 1. So you see here that the port 1, 2 and 3 are configured > correctly but the rest are not. I already added the two kernel parameters > "8250.runtime_uarts=8 8250.nr_uarts=8" Where? > but that didn't help. Does anyone know what could be wrong here? > > I am using Debian 6.0 and the 8 port serial PCI card is the following: > http://www.exsys.ch/index.php?main_page=product_info&products_id=626&language=en > > Last, here is the ouput of "lspci -v" on that card: > > 0d:00.0 Serial controller: Oxford Semiconductor Ltd Device c308 (prog-if 02 > [16550]) > Subsystem: Oxford Semiconductor Ltd Device c308 > Flags: bus master, fast devsel, latency 0, IRQ 19 > Memory at a5000000 (32-bit, non-prefetchable) [size=16K] > Memory at a5200000 (32-bit, non-prefetchable) [size=2M] > Memory at a5400000 (32-bit, non-prefetchable) [size=2M] > Capabilities: [40] Power Management version 3 > Capabilities: [70] Express Endpoint, MSI 00 > Capabilities: [b0] MSI-X: Enable- Count=16 Masked- > Kernel driver in use: serial Are you quite sure that the motherboard only has one serial port? Sometimes the second port needs a IDC + ribbon + bracket with RS232 connector. Consult the motherboard docs. Check CONFIG_SERIAL_8250_NR_UARTS= and CONFIG_SERIAL_8250_RUNTIME_UARTS= in your kernel config. The first is the maximum number of RS232 ports, the second the default. Th first has to be >= the total number of RS232 ports. Edit /etc/default/grub; GRUB_CMDLINE_LINUX="8250.nr_uarts=9" Or 10, if your motherboard has 2 ports. Run update-grub. Check /boot/grub/grub.cfg Reboot. Regards, Rob -- Abolish all monarchies -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/klb4m1$rl6$1...@ger.gmane.org -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1366893143.40521.yahoomail...@web164602.mail.gq1.yahoo.com
