From: Josip Rodin <joy@xxxxxxxxxxxxxx> Date: Sun, 14 Sep 2008 02:52:12 +0200 > For the record I then also noticed this: > > % sudo ls -l /proc/tty/driver/ > total 0 > -r--r--r-- 1 root root 0 2008-09-14 02:16 serial > -r--r--r-- 1 root root 0 2008-09-14 02:16 sunsu > > % sudo cat /proc/tty/driver/serial > serinfo:1.0 driver revision: > 0: uart:16C950/954 port:7FE01000930 irq:19 tx:290 rx:2875 fe:243 brk:12 RTS|CTS|DTR|DSR|CD > 1: uart:16C950/954 port:7FE01000938 irq:19 tx:36 rx:33 RTS|DTR > 2: uart:16550A port:7FE010009A0 irq:20 tx:0 rx:0 > 3: uart:16550A port:7FE010009A8 irq:20 tx:0 rx:0 > > % sudo cat /proc/tty/driver/sunsu > serinfo:1.0 driver revision: > 0: uart:16550A mmio:0x7FE010003F8 irq:15 tx:380 rx:0 RTS|CTS|DTR|DSR|CD > 1: uart:16550A mmio:0x7FE010002E8 irq:15 tx:72 rx:0 RTS|DTR > > That definitely sounds suspicious. Although this is a good area to investigate, conflicting ttyS? device usage, I think the above is OK looking. Those indexes "0", "1", etc. are within the namespace of the device type itself. It does not determine which ttyS? device index these things gets hooked up to. That is determined by the sunserial_register_minors() call made by the Sun drivers and now 8250. What should happen on your system is sunsu registers first, and takes devices /dev/ttyS0 and /dev/ttyS1 Then later the PCI 8250 driver loads and takes /dev/ttyS2 and /dev/ttyS3 for your first card and /dev/ttyS4 and /dev/ttyS5 for your second card. If you look at the contents of /proc/tty/drivers you can probably see this. For example, on my workstation it states: davem@sunset:~/src/GIT/sparc-next-2.6$ cat /proc/tty/drivers /dev/tty /dev/tty 5 0 system:/dev/tty /dev/console /dev/console 5 1 system:console /dev/ptmx /dev/ptmx 5 2 system /dev/vc/0 /dev/vc/0 4 0 system:vtmaster sunsu /dev/ttyS 4 64-65 serial pty_slave /dev/pts 136 0-1048575 pty:slave pty_master /dev/ptm 128 0-1048575 pty:master unknown /dev/tty 4 1-63 console davem@sunset:~/src/GIT/sparc-next-2.6$ You probably have something that looks like: sunsu /dev/ttyS 4 64-65 serial serial /dev/ttyS 4 66-69 serial which would match up with my predictions above. /dev/ttyS0 uses device minor 64, /dev/ttyS1 gets minor 65, etc. -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
