Date: Thu, 2 Nov 2006 08:26:23 GMT From: Alexander Kirillov<benamrun@yandex.ru> To: freebsd-gnats-submit@FreeBSD.org Subject: i386/105063: US Robotics (3Com) 3CP5609 PCI 16550 Modem works bad in FreeBSD 5.4, 6.1 Message-ID: <200611020826.kA28QNvL022148@www.freebsd.org> Resent-Message-ID: <200611020830.kA28UKi3013536@freefall.freebsd.org>
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>Number: 105063
>Category: i386
>Synopsis: US Robotics (3Com) 3CP5609 PCI 16550 Modem works bad in FreeBSD 5.4, 6.1
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-i386
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Nov 02 08:30:19 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Alexander Kirillov
>Release: 5.4, 6.1
>Organization:
>Environment:
FreeBSD avc.orionet.ru 6.1-RELEASE FreeBSD 6.1-RELEASE #0: Sun May 7 04:32:43 UTC 2006 root@opus.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
>Description:
After plugging modem in motherboard:
I. At boot time (with sio2 & sio3 commented in /boot/device.hints):
sio0: <3COM PCI FaxModem> port 0xe000-0xe007 irq 11 at device 13.0 on pci0
sio0: moving to sio2
sio2: type 16550A
fdc0: <floppy drive controller> port 0x3f2-0x3f5,0x3f7 irq 6 drq 2 on acpi0
fdc0: [FAST]
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
can't re-use a leaf (%desc)!
can't re-use a leaf (%driver)!
can't re-use a leaf (%location)!
can't re-use a leaf (%pnpinfo)!
can't re-use a leaf (%parent)!
sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
sio0: type 16550A
sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0
sio1: type 16550A
II. After boot:
1) Configuring /etc/ppp/ppp.conf to work with that modem, starting ppp in interactive mode, entering terminal mode.
2) On ttyv0 appeared message "Interrupt storm detected on "irq11:"; throttling interrupt source"
3) a) By typing something in terminal (for ex., ATI4), we recieve modem echo with delay in 1 symbol (typing "A" -- got nothing, typing "T" -- got "A" and so on).
b) Modem response (for "ATI4" in our case) we can recieve only with typing something in terminal -- for ex., pressing ENTER multiple times. One symbol of response per one pressing.
>How-To-Repeat:
Described in previous field.
>Fix:
I think that code in /usr/src/sys/dev/sio/sio_pci.c for moving serial port from sio0 to first empty sioX is uncorrect. Function sio_pci_kludge_unit, line 131:
"err = device_set_unit(dev, unit); /* EVIL DO NOT COPY */"
Anyway, my fixing way was:
1. enable in kernel "device puc", rebuild kernel. For FreeBSD 5.4 it will be enough: modem will be detected as puc0 and starts work correctly.
2. In 6.1, I think, code of sio_pci.c loads before code of /usr/src/sys/puc/puc_pci.c; than we need also (before kernel rebuild) to comment id line for our modem in sio_pci.c -- line 71, after "static struct pci_ids pci_ids[] = {". I think that all modems listed there will cause problems identically to my one.
>Release-Note:
>Audit-Trail:
>Unformatted:
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