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[Bug 598085] Can't set baud rate to 128000 on /dev/ttyUSB0 cp210x device
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Wed, 21 Apr 2010 10:09:45 +0000
  • Message-id: <20100421100945.93F00CC7CE@xxxxxxxxxxxxxxxxxxxxxx>
http://bugzilla.novell.com/show_bug.cgi?id=598085

http://bugzilla.novell.com/show_bug.cgi?id=598085#c2


--- Comment #2 from Steve Ricketts <velocedge@xxxxxxxxxxx> 2010-04-21 10:09:44
UTC ---
This is on 2.6.34, I'll do another one on the standard build.
I did:

rmmod cp210x
modprobe cp210x debug=1
stty -F /dev/ttyUSB0 128000
:invalid argument

Apr 21 06:04:07 linux-nsxk kernel: [125560.345258] usbcore: deregistering
interface driver cp210x
Apr 21 06:04:07 linux-nsxk kernel: [125560.345356] cp210x ttyUSB0: cp210x
converter now disconnected from ttyUSB0
Apr 21 06:04:07 linux-nsxk kernel: [125560.345367]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_disconnect
Apr 21 06:04:07 linux-nsxk kernel: [125560.345370]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_cleanup - port 0
Apr 21 06:04:07 linux-nsxk kernel: [125560.345376] cp210x 4-1:1.0: device
disconnected
Apr 21 06:04:07 linux-nsxk kernel: [125560.345390] USB Serial deregistering
driver cp210x
Apr 21 06:04:19 linux-nsxk kernel: [125572.963452] USB Serial support
registered for cp210x
Apr 21 06:04:19 linux-nsxk kernel: [125572.963479] cp210x 4-1:1.0: cp210x
converter detected
Apr 21 06:04:19 linux-nsxk kernel: [125573.072021] usb 4-1: reset full speed
USB device using uhci_hcd and address 3
Apr 21 06:04:19 linux-nsxk kernel: [125573.220631] usb 4-1: cp210x converter
now attached to ttyUSB0
Apr 21 06:04:19 linux-nsxk kernel: [125573.220649] usbcore: registered new
interface driver cp210x
Apr 21 06:04:19 linux-nsxk kernel: [125573.220652] cp210x: v0.09:Silicon Labs
CP210x RS232 serial adaptor driver
Apr 21 06:04:34 linux-nsxk kernel: [125587.873573]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_open - port 0
Apr 21 06:04:34 linux-nsxk kernel: [125587.874630]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_get_termios_port - port 0
Apr 21 06:04:34 linux-nsxk kernel: [125587.875622]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_get_termios_port - baud rate = 115200
Apr 21 06:04:34 linux-nsxk kernel: [125587.876623]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_get_termios_port - data bits = 8
Apr 21 06:04:34 linux-nsxk kernel: [125587.876627]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_get_termios_port - parity = NONE
Apr 21 06:04:34 linux-nsxk kernel: [125587.876630]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_get_termios_port - stop bits = 1
Apr 21 06:04:34 linux-nsxk kernel: [125587.877620]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_get_termios_port - flow control = NONE
Apr 21 06:04:34 linux-nsxk kernel: [125587.877625]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_tiocmset_port - port 0
Apr 21 06:04:34 linux-nsxk kernel: [125587.877629]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_tiocmset_port - control = 0x0303
Apr 21 06:04:34 linux-nsxk kernel: [125587.878827]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_tiocmset_port - port 0
Apr 21 06:04:34 linux-nsxk kernel: [125587.878831]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_tiocmset_port - control = 0x0300
Apr 21 06:04:34 linux-nsxk kernel: [125587.879622]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_close - port 0
Apr 21 06:04:34 linux-nsxk kernel: [125587.879625]
/usr/src/packages/BUILD/kernel-default-2.6.34/linux-2.6.33/drivers/usb/serial/cp210x.c:
cp210x_close - shutting down urbs

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