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

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That's a repeatable enough problem you should raise it with the linux usb
developer folks.

It's quite possibly a problem with the USB stack itself and if you get that
many errors you'd be a great test case for them to try to fix it.

Of course it could also be an actual hardware bug.

At the very least it would help in making the error recovery in the stack
better.

On Thu, Jan 29, 2009 at 3:40 AM, Toan Pham <tph...@gm...> wrote:

> 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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>
>
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