[Ftdi-usb-sio-devel] Fwd: Interleaved write/read operations on ftdi_sio seem to cause an error

[Toan P. <tph...@gm...>]

Bill Ryder,

This bug seem very related to the bus disconnect and reconnect problem
that I discussed to you about a month ago.
What happened was: we had 4 keypads on a USB bus which sends and
receive data to the linux host in relatively low bandwidth,
approximately 4 bytes per Endpoint transaction per keypad per .3
second.  Running at this rate, we experience approximately 5
disconnection-reconnection per day per system (usb bus).  In many
cases, our application is able to redetect and communicate with
keypads with has been disconnected/reconnected.  In some rare cases,
physical disconnect and reconnect of a device is required for our
application to talk to it.

Here is a dmesg of one system running UBUNTU :
--------------------------------------------------------------------------------------------------
[358472.160465] hub 3-0:1.0: port 2 disabled by hub (EMI?), re-enabling...
[358472.160491] usb 3-2: USB disconnect, address 8
[358472.160494] usb 3-2.1: USB disconnect, address 15
[358472.160632] ftdi_sio 3-2.1:1.0: device disconnected
[358472.160747] usb 3-2.2: USB disconnect, address 10
[358472.160839] ftdi_sio 3-2.2:1.0: device disconnected
[358472.160942] usb 3-2.3: USB disconnect, address 11
[358472.161028] ftdi_sio 3-2.3:1.0: device disconnected
[358472.161126] usb 3-2.4: USB disconnect, address 14
[358472.161209] ftdi_sio 3-2.4:1.0: device disconnected
[358472.272338] usb 3-2: new full speed USB device using uhci_hcd and address 16
[358472.273327]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: error from
flowcontrol urb
[358472.273400]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: update_mctrl
Error from MODEM_CTRL urb: DTR LOW, RTS LOW
[358472.273794] ftdi_sio ttyUSB2: FTDI USB Serial Device converter now
disconnected from ttyUSB2
[358472.282327]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: error from
flowcontrol urb
[358472.282403]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: update_mctrl
Error from MODEM_CTRL urb: DTR LOW, RTS LOW
[358472.282781] ftdi_sio ttyUSB3: FTDI USB Serial Device converter now
disconnected from ttyUSB3
[358472.290235]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: error from
flowcontrol urb
[358472.290309]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: update_mctrl
Error from MODEM_CTRL urb: DTR LOW, RTS LOW
[358472.290691] ftdi_sio ttyUSB0: FTDI USB Serial Device converter now
disconnected from ttyUSB0
[358472.383373]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: error from
flowcontrol urb
[358472.383425]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: update_mctrl
Error from MODEM_CTRL urb: DTR LOW, RTS LOW
[358472.383809] ftdi_sio ttyUSB1: FTDI USB Serial Device converter now
disconnected from ttyUSB1
[358472.415852] usb 3-2: configuration #1 chosen from 1 choice
[358472.418784] hub 3-2:1.0: USB hub found
[358472.420745] hub 3-2:1.0: 4 ports detected
[358472.749410] usb 3-2.1: new full speed USB device using uhci_hcd
and address 17
[358472.908371] usb 3-2.1: configuration #1 chosen from 1 choice
[358472.911319] ftdi_sio 3-2.1:1.0: FTDI USB Serial Device converter detected
[358472.911350]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: Detected
FT232RL
[358472.911498] usb 3-2.1: FTDI USB Serial Device converter now
attached to ttyUSB0
[358473.136029] usb 3-2.2: new full speed USB device using uhci_hcd
and address 18
[358473.295999] usb 3-2.2: configuration #1 chosen from 1 choice
[358473.298945] ftdi_sio 3-2.2:1.0: FTDI USB Serial Device converter detected
[358473.298977]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: Detected
FT232RL
[358473.299129] usb 3-2.2: FTDI USB Serial Device converter now
attached to ttyUSB1
[358473.519654] usb 3-2.3: new full speed USB device using uhci_hcd
and address 19
[358473.679628] usb 3-2.3: configuration #1 chosen from 1 choice
[358473.682569] ftdi_sio 3-2.3:1.0: FTDI USB Serial Device converter detected
[358473.682602]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: Detected
FT232RL
[358473.682749] usb 3-2.3: FTDI USB Serial Device converter now
attached to ttyUSB2
[358473.903279] usb 3-2.4: new full speed USB device using uhci_hcd
and address 20
[358474.063248] usb 3-2.4: configuration #1 chosen from 1 choice
[358474.066194] ftdi_sio 3-2.4:1.0: FTDI USB Serial Device converter detected
[358474.066227]
/build/buildd/linux-2.6.24/drivers/usb/serial/ftdi_sio.c: Detected
FT232RL
[358474.066374] usb 3-2.4: FTDI USB Serial Device converter now
attached to ttyUSB3



ANOTHER DMESG OF A SYSTEM RUNNING T2 (OUR CUSTOMIZED EMBEDDED LINUX OS)
-----------------------------------------------------------------------------------------------------------------
usb 2-1: USB disconnect, address 28
usb 2-1.1: USB disconnect, address 29
ftdi_sio 2-1.1:1.0: device disconnected
usb 2-1.2: USB disconnect, address 30
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
ftdi_sio 2-1.2:1.0: device disconnected
usb 2-1.3: USB disconnect, address 31
ftdi_sio 2-1.3:1.0: device disconnected
usb 2-1.4: USB disconnect, address 32
ftdi_sio 2-1.4:1.0: device disconnected
usb 2-1: clear tt 1 (9201) error -108
usb 2-1: clear tt 1 (91f1) error -19
ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0
ftdi_sio ttyUSB1: FTDI USB Serial Device converter now disconnected from ttyUSB1
ftdi_sio ttyUSB3: FTDI USB Serial Device converter now disconnected from ttyUSB3
drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
ftdi_sio ttyUSB2: FTDI USB Serial Device converter now disconnected from ttyUSB2
usb 2-1: new high speed USB device using ehci_hcd and address 33
usb 2-1: configuration #1 chosen from 1 choice
hub 2-1:1.0: USB hub found
hub 2-1:1.0: 4 ports detected
usb 2-1.1: new full speed USB device using ehci_hcd and address 34
usb 2-1.1: configuration #1 chosen from 1 choice
ftdi_sio 2-1.1:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232RL
usb 2-1.1: FTDI USB Serial Device converter now attached to ttyUSB0
usb 2-1.2: new full speed USB device using ehci_hcd and address 35
usb 2-1.2: configuration #1 chosen from 1 choice
ftdi_sio 2-1.2:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232RL
usb 2-1.2: FTDI USB Serial Device converter now attached to ttyUSB1
usb 2-1.3: new full speed USB device using ehci_hcd and address 36
usb 2-1.3: configuration #1 chosen from 1 choice
ftdi_sio 2-1.3:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232RL
usb 2-1.3: FTDI USB Serial Device converter now attached to ttyUSB2
usb 2-1.4: new full speed USB device using ehci_hcd and address 37
usb 2-1.4: configuration #1 chosen from 1 choice
ftdi_sio 2-1.4:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232RL
usb 2-1.4: FTDI USB Serial Device converter now attached to ttyUSB3
usb 2-1.4: USB disconnect, address 37
ftdi_sio 2-1.4:1.0: device disconnected
usb 2-1.4: new full speed USB device using ehci_hcd and address 38
drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
ftdi_sio ttyUSB3: FTDI USB Serial Device converter now disconnected from ttyUSB3
usb 2-1.4: configuration #1 chosen from 1 choice
ftdi_sio 2-1.4:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232RL
usb 2-1.4: FTDI USB Serial Device converter now attached to ttyUSB3
usb 2-1.4: USB disconnect, address 38
ftdi_sio 2-1.4:1.0: device disconnected
drivers/usb/serial/ftdi_sio.c: error from flowcontrol urb
drivers/usb/serial/ftdi_sio.c: update_mctrl Error from MODEM_CTRL urb:
DTR LOW, RTS LOW
ftdi_sio ttyUSB3: FTDI USB Serial Device converter now disconnected from ttyUSB3
usb 2-1.4: new full speed USB device using ehci_hcd and address 39
usb 2-1.4: configuration #1 chosen from 1 choice
ftdi_sio 2-1.4:1.0: FTDI USB Serial Device converter detected
drivers/usb/serial/ftdi_sio.c: Detected FT232RL
usb 2-1.4: FTDI USB Serial Device converter now attached to ttyUSB3


I've just ordered the TOTAL PHASE Beagle USB 480 Protocol analyzer
with hardware filtering.
Hopefully in the next few days, I'd be able to findout what really happened.

Toan




On Wed, Jan 28, 2009 at 3:57 AM, Bill Ryder <bil...@gm...> wrote:
> This bit is suspicious:
>
> [72206.721645] /tmp/linux-2.6.27.9/drivers/
> usb/serial/ftdi_sio.c: (this
> is ok on close) nonzero read bulk status received: -75
> [72206.721652] /tmp/linux-2.6.27.9/drivers/usb/serial/ftdi_sio.c:
> ftdi_write_bulk_callback - port 0
> [72206.856067] hub 4-0:1.0: port 2 disabled by hub (EMI?), re-enabling...
> [72206.856076] usb 4-2: USB disconnect, address 43
> The write bulk callback gives an error then the usb stack says the hub has
> disabled the port - which is probably the cause of the error.
>
> You could try it without the hub in the way or maybe off another usb port.
>
>
>
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