Hello people!

I write you because I have got a problem with the uplcom driver
on FreeBSD 9.0, I tried a lot of different things, read all I found,
manpages, forums, irc, google but still not able to solve my problem.

I need to connect to my remote Alix board,
the remote console setup is 19200 8N1.
I am using a short USB Prolific Tec.. serial cable adapter with a
NULL modem cable, the last one plugged one side to the Alix board,
the other side to the adapter cable.

Under Linux Debian everything is fine, so the hardware and cables
should be ok, under Linux I used minicom and cu and tip without problems.
With FreeBSD and NetBSD, big problems..the result is always
the same, I can receive but I cannot transmit.

(working as root)
*cu -t -s 19200 -l /dev/cuaU0
write: Device not configured
(I can't transmit but I can receive the output if I reboot the remote
alix board)
*minicom
test1 ----> Cannot open /dev/ttyU0!
test2 ----> Cannot open /dev/cuaU0!
(in a popup box)

#----

A bit of my enviroment and some command output (commands by root):
I am using FreeBSD 9.0 with kernel and world compiled today with the last source
updated with csup. The laptop is a Lenovo IBM Thinkpad T61. 4Gbyte of RAM,
HD 40% used. Shell bash, X graphical enviroment with Fluxbox, the problem
exist even within the shell without load Xorg.


* usbconfig -d ugen1.2 show_ifdrv
ugen1.2: <USB 2.0 To COM Device Prolific Technology Inc.> at usbus1,
cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON
ugen1.2.0: uplcom0: <Prolific Technology Inc. USB 2.0 To COM Device,
class 0/0, rev 1.10/3.00, addr 2>


* usbconfig -d ugen1.2 dump_device_desc
ugen1.2: <USB 2.0 To COM Device Prolific Technology Inc.> at usbus1,
cfg=0 md=HOST spd=FULL (12Mbps) pwr=ON

 bLength = 0x0012
 bDescriptorType = 0x0001
 bcdUSB = 0x0110
 bDeviceClass = 0x0000
 bDeviceSubClass = 0x0000
 bDeviceProtocol = 0x0000
 bMaxPacketSize0 = 0x0040
 idVendor = 0x067b
 idProduct = 0x2303
 bcdDevice = 0x0300
 iManufacturer = 0x0001  <Prolific Technology Inc.>
 iProduct = 0x0002  <USB 2.0 To COM Device>
 iSerialNumber = 0x0000  <no string>
 bNumConfigurations = 0x0001


* dmesg when I connect the cable:
ugen1.2: <Prolific Technology Inc.> at usbus1
uplcom0: <Prolific Technology Inc. USB 2.0 To COM Device, class 0/0,
rev 1.10/3.00, addr 2> on usbus1

* KLDSTAT
Id Refs Address            Size     Name
 1   36 0xffffffff80200000 d58c20   kernel
 3    1 0xffffffff80f6c000 104ab40  nvidia.ko
 4    4 0xffffffff81fb7000 45218    linux.ko
 5    1 0xffffffff82212000 13300f   zfs.ko
 6    1 0xffffffff82346000 2fb5     opensolaris.ko
 7    1 0xffffffff82349000 3d5d     linprocfs.ko
 8    1 0xffffffff8234d000 24c19    wpifw.ko
10    1 0xffffffff82374000 2a4c1    pf.ko
11    1 0xffffffff8239f000 762      rtc.ko
12    1 0xffffffff82372000 1fd5     uplcom.ko

* stty -a -f /dev/cuaU0
speed 9600 baud; 0 rows; 0 columns;
lflags: icanon isig iexten echo echoe -echok echoke -echonl echoctl
       -echoprt -altwerase -noflsh -tostop -flusho -pendin -nokerninfo
       -extproc
iflags: -istrip icrnl -inlcr -igncr ixon -ixoff ixany imaxbel -ignbrk
       brkint -inpck -ignpar -parmrk
oflags: opost onlcr -ocrnl tab0 -onocr -onlret
cflags: cread cs8 -parenb -parodd hupcl -clocal -cstopb -crtscts -dsrflow
       -dtrflow -mdmbuf
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>;
       eol2 = <undef>; erase = ^?; erase2 = ^H; intr = ^C; kill = ^U;
       lnext = ^V; min = 1; quit = ^\; reprint = ^R; start = ^Q;
       status = ^T; stop = ^S; susp = ^Z; time = 0; werase = ^W;

I tried to change the above parameters with "stty" by
hand using cuaU0, cuaU0.init and cuaU0.lock before using cu, tip
and minicom. I tried different combinations to the parameters of
the connections but still the problem persist.

My problem is exactly the same to that reported here:
http://lists.freebsd.org/pipermail/freebsd-usb/2011-July/010443.html

If I try to do:
sysctl hw.usb.ucom.debug=15

I see in dmesg after "cu -t -s 19200 -l /dev/cuaU0":

ucom_attach_tty: ttycreate: U0
ucom_attach: tp = 0xfffffe0005e08800, unit = 0, subunits = 1
ucom_open: tp = 0xfffffe0005e08800
ucom_dtr: onoff = 1
ucom_line_state: on=0x01, off=0x00
ucom_rts: onoff = 1
ucom_line_state: on=0x02, off=0x00
ucom_ring: onoff = 0
ucom_line_state: on=0x00, off=0x08
ucom_break: onoff = 0
ucom_line_state: on=0x00, off=0x04
ucom_status_change:
ucom_param: sc = 0xfffffe0005106880
ucom_dtr: onoff = 1
ucom_line_state: on=0x01, off=0x00
ucom_rts: onoff = 1
ucom_line_state: on=0x02, off=0x00
ucom_cfg_open:
ucom_ioctl: cmd = 0x402c7413
ucom_ioctl: cmd = 0x802c7416
ucom_ioctl: cmd = 0x2000740d
ucom_ioctl: cmd = 0x402c7413
ucom_ioctl: cmd = 0x802c7416
ucom_param: sc = 0xfffffe0005106880
ucom_ioctl: cmd = 0x8004667e
ucom_ioctl: cmd = 0x8004667d
ucom_status_change:
ucom_status_change:
ucom_get_data: cnt=0
ucom_outwakeup: sc = 0xfffffe0005106880
ucom_get_data: cnt=1
ucom_outwakeup: sc = 0xfffffe0005106880
ucom_outwakeup: sc = 0xfffffe0005106880
uplcom0: at uhub1, port 1, addr 2 (disconnected)
ucom_detach_tty: sc = 0xfffffe0005106880, tp = 0xfffffe0005e08800
ucom_close: tp=0xfffffe0005e08800
ucom_close: tp=0xfffffe0005e08800 already closed
uplcom0: <Prolific Technology Inc. USB 2.0 To COM Device, class 0/0,
rev 1.10/3.00, addr 2> on usbus1
ucom_attach_tty: ttycreate: U0
ucom_attach: tp = 0xfffffe0007953400, unit = 0, subunits = 1


Do you have any idea where to give a look to fix my problem?
Do you need other information?
I suspect that the device is continuously disconnecting and reconnecting
in background...but it is just a suspect.
I run out of resources and brain but I still need to solve my problem
and connect with my remote Alix board using FreeBSD or NetBSD.

Thank you,
best regards

Fabio Balzano
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