fdrcmoro
n00b
Joined: 17 Nov 2010
Posts: 5
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 Posted: Thu Nov 18, 2010 5:29 pm Post subject: [SOLVED] udev: no population of /dev/ttyUSB* with ftdi_sio |
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Hi,
I've been working with the single-board computer Gumstix. It's possible to open an usb serial console using ssh.
Before I was working with Ubuntu and once I plugged the usb cable the board was detected and /dev/ttyUSB* was populated. Then using kermit I could open the console and everything worked fine.
Now I'm trying to do the same with Gentoo but I can't detect the device. I have kernel 2.6.34-gentoo-r12 and of course udev installed.
I know that I need the support for usb serial and ftdi so I recompiled the kernel adding these two modules built-in: that are the modules usbserial and ftdi_sio.
This is the output of tail -f /var/log/messages when I plug the device:
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Nov 18 02:15:29 Leviathan kernel: [ 5476.771900] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0004
Nov 18 02:15:29 Leviathan kernel: [ 5476.771909] ehci_hcd 0000:00:1d.7: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT
Nov 18 02:15:29 Leviathan kernel: [ 5476.771916] hub 2-0:1.0: port 2, status 0501, change 0001, 480 Mb/s
Nov 18 02:15:29 Leviathan kernel: [ 5476.875013] hub 2-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501
Nov 18 02:15:29 Leviathan kernel: [ 5476.926242] ehci_hcd 0000:00:1d.7: port 2 full speed --> companion
Nov 18 02:15:29 Leviathan kernel: [ 5476.926248] ehci_hcd 0000:00:1d.7: GetStatus port 2 status 003801 POWER OWNER sig=j CONNECT
Nov 18 02:15:29 Leviathan kernel: [ 5476.926264] usb usb6: wakeup_rh (auto-start)
Nov 18 02:15:29 Leviathan kernel: [ 5476.926274] hub 2-0:1.0: port 2 not reset yet, waiting 50ms
Nov 18 02:15:29 Leviathan kernel: [ 5476.977019] ehci_hcd 0000:00:1d.7: GetStatus port 2 status 003002 POWER OWNER sig=se0 CSC
Nov 18 02:15:29 Leviathan kernel: [ 5476.977042] hub 6-0:1.0: state 7 ports 2 chg 0000 evt 0004
Nov 18 02:15:29 Leviathan kernel: [ 5476.977050] uhci_hcd 0000:00:1d.0: port 2 portsc 0093,00
Nov 18 02:15:29 Leviathan kernel: [ 5476.977056] hub 6-0:1.0: port 2, status 0101, change 0001, 12 Mb/s
Nov 18 02:15:29 Leviathan kernel: [ 5477.081017] hub 6-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x101
Nov 18 02:15:29 Leviathan kernel: [ 5477.183016] usb 6-2: new full speed USB device using uhci_hcd and address 12
Nov 18 02:15:29 Leviathan kernel: [ 5477.303009] usb 6-2: ep0 maxpacket = 8
Nov 18 02:15:29 Leviathan kernel: [ 5477.340285] usb 6-2: default language 0x0409
Nov 18 02:15:29 Leviathan kernel: [ 5477.369289] usb 6-2: udev 12, busnum 6, minor = 651
Nov 18 02:15:29 Leviathan kernel: [ 5477.369292] usb 6-2: New USB device found, idVendor=0403, idProduct=6001
Nov 18 02:15:29 Leviathan kernel: [ 5477.369295] usb 6-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov 18 02:15:29 Leviathan kernel: [ 5477.369298] usb 6-2: Product: FT232R USB UART
Nov 18 02:15:29 Leviathan kernel: [ 5477.369299] usb 6-2: Manufacturer: FTDI
Nov 18 02:15:29 Leviathan kernel: [ 5477.369301] usb 6-2: SerialNumber: A5003vq1
Nov 18 02:15:29 Leviathan kernel: [ 5477.369378] usb 6-2: usb_probe_device
Nov 18 02:15:29 Leviathan kernel: [ 5477.369382] usb 6-2: configuration #1 chosen from 1 choice
Nov 18 02:15:29 Leviathan kernel: [ 5477.372288] usb 6-2: adding 6-2:1.0 (config #1, interface 0)
Nov 18 02:15:29 Leviathan kernel: [ 5477.377326] drivers/usb/core/inode.c: creating file '012'
Nov 18 02:15:29 Leviathan kernel: [ 5477.377346] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0004
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With an Ubuntu live-cd everything works and this is the result of tail -f /var/log/messages:
| Code: |
Nov 17 00:24:05 ubuntu kernel: [ 764.760290] usb 5-2: new full speed USB device using uhci_hcd and address 4
Nov 17 00:24:05 ubuntu kernel: [ 764.980813] usb 5-2: configuration #1 chosen from 1 choice
Nov 17 00:24:05 ubuntu kernel: [ 764.985447] ftdi_sio 5-2:1.0: FTDI USB Serial Device converter detected
Nov 17 00:24:05 ubuntu kernel: [ 764.987437] ftdi_sio: Detected FT232RL
Nov 17 00:24:05 ubuntu kernel: [ 764.988800] usb 5-2: FTDI USB Serial Device converter now attached to ttyUSB0
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These are the results with the two systems (gentoo and ubuntu live-cd) of the command udevadm monitor
Gentoo:
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KERNEL[1290043207.629323] add /devices/pci0000:00/0000:00:1d.0/usb6/6-2 (usb)
KERNEL[1290043207.637198] add /devices/pci0000:00/0000:00:1d.0/usb6/6-2/6-2:1.0 (usb)
UDEV [1290043207.638520] add /devices/pci0000:00/0000:00:1d.0/usb6/6-2 (usb)
UDEV [1290043207.641153] add /devices/pci0000:00/0000:00:1d.0/usb6/6-2/6-2:1.0 (usb)
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Ubuntu live-cd:
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UEVENT[1289953054.789078] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2 (usb)
UEVENT[1289953054.791688] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0 (usb)
UDEV [1289953054.792747] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2 (usb)
UEVENT[1289953054.796976] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/usb_endpoint/usbdev5.2_ep81 (usb_endpoint)
UEVENT[1289953054.797018] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/usb_endpoint/usbdev5.2_ep02 (usb_endpoint)
UEVENT[1289953054.797043] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/usb_endpoint/usbdev5.2_ep00 (usb_endpoint)
UDEV [1289953054.813212] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/usb_endpoint/usbdev5.2_ep00 (usb_endpoint)
UEVENT[1289953055.143694] add /module/usbserial (module)
UEVENT[1289953055.144355] add /bus/usb-serial (bus)
UEVENT[1289953055.144955] add /bus/usb/drivers/usbserial (drivers)
UDEV [1289953055.145631] add /module/usbserial (module)
UDEV [1289953055.145960] add /bus/usb/drivers/usbserial (drivers)
UEVENT[1289953055.146104] add /bus/usb-serial/drivers/generic (drivers)
UEVENT[1289953055.146302] add /bus/usb/drivers/usbserial_generic (drivers)
UDEV [1289953055.146369] add /bus/usb-serial (bus)
UDEV [1289953055.147515] add /bus/usb-serial/drivers/generic (drivers)
UDEV [1289953055.148119] add /bus/usb/drivers/usbserial_generic (drivers)
UEVENT[1289953055.223765] add /module/ftdi_sio (module)
UEVENT[1289953055.224014] add /bus/usb-serial/drivers/ftdi_sio (drivers)
UDEV [1289953055.224304] add /module/ftdi_sio (module)
UEVENT[1289953055.224660] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/ttyUSB0 (usb-serial)
UDEV [1289953055.225224] add /bus/usb-serial/drivers/ftdi_sio (drivers)
UEVENT[1289953055.225249] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/ttyUSB0/tty/ttyUSB0 (tty)
UEVENT[1289953055.226199] add /bus/usb/drivers/ftdi_sio (drivers)
UDEV [1289953055.226734] add /bus/usb/drivers/ftdi_sio (drivers)
UDEV [1289953055.227856] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0 (usb)
UDEV [1289953055.230478] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/usb_endpoint/usbdev5.2_ep81 (usb_endpoint)
UDEV [1289953055.232888] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/usb_endpoint/usbdev5.2_ep02 (usb_endpoint)
UDEV [1289953055.234447] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/ttyUSB0 (usb-serial)
UDEV [1289953055.246308] add /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2:1.0/ttyUSB0/tty/ttyUSB0 (tty)
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KERNEL in the first output e UEVENT in the second should refer to the same thing: that is kernel uevent.
I managed by the following udev rule:
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SSUBSYSTEMS=="usb", ATTRS{product}=="FT232R USB UART", ATTRS{serial}=="A5003vq1", SYMLINK+="gumstix"
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to obtain a link in /dev/gumstix but when I run the kermit command this is the output:
| Code: |
> kermit -l /dev/gumstix
/dev/bus/usb/006/013 is not a terminal device
can't open device
> ls -l /dev/gumstix
lrwxrwxrwx 1 root root 15 18 nov 02.20 /dev/gumstix -> bus/usb/006/013
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I read that usb detection should work in this way: detection of the two endpoints (IN and OUT) and bulk of the two endpoints in order to create the link in /dev/ttyUSB*. And I think this is what happens with Ubuntu.
Having a look at the kernel configuration these are the modules that I added.
| Code: |
Device Drivers --->
[*] USB support --->
<M> USB Serial Converter support --->
[*] USB Generic Serial Driver
<M> USB FTDI Single Port Serial Driver
<M> USB Fundamental Software Dongle Driver
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I'm not sure of the Dongle Driver but I tryed both with and without it. In the test shown before all the modules were built-in; now I tryed to compile them as modules. All of them except for the Generic Serial Drive that is not possible to compile as module.
While the result of udevadm monitor is still the same, this is instead the result of the system log:
| Code: |
Nov 18 02:56:05 Leviathan kernel: [ 788.233077] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0004
Nov 18 02:56:05 Leviathan kernel: [ 788.233086] ehci_hcd 0000:00:1d.7: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT
Nov 18 02:56:05 Leviathan kernel: [ 788.233093] hub 2-0:1.0: port 2, status 0501, change 0001, 480 Mb/s
Nov 18 02:56:05 Leviathan kernel: [ 788.337011] hub 2-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501
Nov 18 02:56:05 Leviathan kernel: [ 788.388289] ehci_hcd 0000:00:1d.7: port 2 full speed --> companion
Nov 18 02:56:05 Leviathan kernel: [ 788.388294] ehci_hcd 0000:00:1d.7: GetStatus port 2 status 003801 POWER OWNER sig=j CONNECT
Nov 18 02:56:05 Leviathan kernel: [ 788.388304] hub 2-0:1.0: port 2 not reset yet, waiting 50ms
Nov 18 02:56:05 Leviathan kernel: [ 788.388314] usb usb6: wakeup_rh (auto-start)
Nov 18 02:56:05 Leviathan kernel: [ 788.439020] ehci_hcd 0000:00:1d.7: GetStatus port 2 status 003002 POWER OWNER sig=se0 CSC
Nov 18 02:56:05 Leviathan kernel: [ 788.439044] hub 6-0:1.0: state 7 ports 2 chg 0000 evt 0004
Nov 18 02:56:05 Leviathan kernel: [ 788.439052] uhci_hcd 0000:00:1d.0: port 2 portsc 0093,00
Nov 18 02:56:05 Leviathan kernel: [ 788.439058] hub 6-0:1.0: port 2, status 0101, change 0001, 12 Mb/s
Nov 18 02:56:05 Leviathan kernel: [ 788.543013] hub 6-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x101
Nov 18 02:56:06 Leviathan kernel: [ 788.645013] usb 6-2: new full speed USB device using uhci_hcd and address 7
Nov 18 02:56:06 Leviathan kernel: [ 788.765007] usb 6-2: ep0 maxpacket = 8
Nov 18 02:56:06 Leviathan kernel: [ 788.802274] usb 6-2: default language 0x0409
Nov 18 02:56:06 Leviathan kernel: [ 788.831276] usb 6-2: udev 7, busnum 6, minor = 646
Nov 18 02:56:06 Leviathan kernel: [ 788.831279] usb 6-2: New USB device found, idVendor=0403, idProduct=6001
Nov 18 02:56:06 Leviathan kernel: [ 788.831281] usb 6-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov 18 02:56:06 Leviathan kernel: [ 788.831284] usb 6-2: Product: FT232R USB UART
Nov 18 02:56:06 Leviathan kernel: [ 788.831286] usb 6-2: Manufacturer: FTDI
Nov 18 02:56:06 Leviathan kernel: [ 788.831287] usb 6-2: SerialNumber: A5003vq1
Nov 18 02:56:06 Leviathan kernel: [ 788.831363] usb 6-2: usb_probe_device
Nov 18 02:56:06 Leviathan kernel: [ 788.831367] usb 6-2: configuration #1 chosen from 1 choice
Nov 18 02:56:06 Leviathan kernel: [ 788.834272] usb 6-2: adding 6-2:1.0 (config #1, interface 0)
Nov 18 02:56:06 Leviathan kernel: [ 788.839307] drivers/usb/core/inode.c: creating file '007'
Nov 18 02:56:06 Leviathan kernel: [ 788.839325] hub 2-0:1.0: state 7 ports 6 chg 0000 evt 0004
Nov 18 02:56:06 Leviathan kernel: [ 788.845161] usbserial: Unknown symbol usb_autopm_put_interface
Nov 18 02:56:06 Leviathan kernel: [ 788.847218] usbserial: Unknown symbol usb_autopm_get_interface
Nov 18 02:56:06 Leviathan kernel: [ 788.848566] ftdi_sio: Unknown symbol usb_serial_port_softint
Nov 18 02:56:06 Leviathan kernel: [ 788.848778] ftdi_sio: Unknown symbol usb_serial_handle_sysrq_char
Nov 18 02:56:06 Leviathan kernel: [ 788.848926] ftdi_sio: Unknown symbol usb_serial_disconnect
Nov 18 02:56:06 Leviathan kernel: [ 788.849424] ftdi_sio: Unknown symbol usb_serial_handle_break
Nov 18 02:56:06 Leviathan kernel: [ 788.849718] ftdi_sio: Unknown symbol usb_serial_probe
Nov 18 02:56:06 Leviathan kernel: [ 788.849797] ftdi_sio: Unknown symbol usb_serial_register
Nov 18 02:56:06 Leviathan kernel: [ 788.849880] ftdi_sio: Unknown symbol usb_serial_deregister
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It seems that I've got a problem with modules usbserial and ftdi_sio.
The functions:
usb_serial_port_softint
usb_serial_disconnect
usb_serial_probe
usb_serial_register
usb_serial_deregister
called by ftdi_sio are defined in drivers/usb/serial/usb-serial.c and include/linux/usb/serial.h, both present in my kernel sources. And I think these functions are part of the usbserial module.
The functions:
usb_serial_handle_break
usb_serial_handle_sysrq_char
also called by ftdi_sio are defined in drivers/usb/serial/generic.c and include/linux/usb/serial.h. This time I guess I'm dealing with the usbserial_generic driver that is also used in Ubuntu (see the udevadm monitor executed with the live-cd shown above).
And finally the functions:
usb_autopm_put_interface
usb_autopm_get_interface
called by usbserial are defined in drivers/usb/core/driver.c e include/linux/usb.h. usbcore module?
I've also tryed to compile alle the usb features as module but no way to make it work.
In conclusion with my previous Ubuntu and with an Ubuntu live-cd the device is correctly detected and /dev/ttyUSB* is populated. With my Gentoo and a Gentoo live-cd I can't.
Any ideas? 
Last edited by fdrcmoro on Fri Nov 19, 2010 12:12 am; edited 1 time in total |
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