Hi All!
I'm observing some strange usb behavior.
I have a board with an onboard ftdi usb chip acting as 2 rs232 ports.
And I have on the same board an external usb device with again a ftdi
chip on board, this time acting as a single rs485 port.
Build Configuration:
BB_VERSION = "1.8.18"
METADATA_BRANCH = "release-2010.12"
METADATA_REVISION = "dec3967"
TARGET_ARCH = "arm"
TARGET_OS = "linux-gnueabi"
MACHINE = "at91sam9263ek-special"
DISTRO = "angstrom"
DISTRO_VERSION = "2010.7-test-20101210"
TARGET_FPU = "soft"
So when I boot with the external device in the connector the internal
and external devices are detected as expected.
[ 1.280000] usb 1-1: new full speed USB device using at91_ohci
and address 2
[ 1.460000] usb 1-1: configuration #1 chosen from 1 choice
[ 1.470000] ftdi_sio 1-1:1.0: FTDI USB Serial Device converter
detected
[ 1.470000] usb 1-1: Detected FT2232C
[ 1.480000] usb 1-1: Number of endpoints 2
[ 1.480000] usb 1-1: Endpoint 1 MaxPacketSize 64
[ 1.490000] usb 1-1: Endpoint 2 MaxPacketSize 64
[ 1.490000] usb 1-1: Setting MaxPacketSize 64
[ 1.500000] usb 1-1: FTDI USB Serial Device converter now
attached to ttyUSB0
[ 1.510000] ftdi_sio 1-1:1.1: FTDI USB Serial Device converter
detected
[ 1.510000] usb 1-1: Detected FT2232C
[ 1.520000] usb 1-1: Number of endpoints 2
[ 1.520000] usb 1-1: Endpoint 1 MaxPacketSize 64
[ 1.530000] usb 1-1: Endpoint 2 MaxPacketSize 64
[ 1.530000] usb 1-1: Setting MaxPacketSize 64
[ 1.540000] usb 1-1: FTDI USB Serial Device converter now
attached to ttyUSB1
[ 1.680000] usb 1-2: new full speed USB device using at91_ohci
and address 3
[ 1.860000] usb 1-2: configuration #1 chosen from 1 choice
[ 1.870000] ftdi_sio 1-2:1.0: FTDI USB Serial Device converter
detected
[ 1.880000] usb 1-2: Detected FT232RL
[ 1.880000] usb 1-2: Number of endpoints 2
[ 1.890000] usb 1-2: Endpoint 1 MaxPacketSize 64
[ 1.890000] usb 1-2: Endpoint 2 MaxPacketSize 64
[ 1.900000] usb 1-2: Setting MaxPacketSize 64
[ 1.900000] usb 1-2: FTDI USB Serial Device converter now
attached to ttyUSB2
But if I look at the /dev directory ttyUSB2 is missing!
# ls -l /dev/ttyU*
crw-rw---- 1 root dialout 188, 0 Jan 1 1970
/dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 Jan 1 1970
/dev/ttyUSB1
# lsusb
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0403:6010 Future Technology Devices
International, Ltd FT2232C Dual USB-UART/FIFO IC
Bus 001 Device 003: ID 0403:6001 Future Technology Devices
International, Ltd FT232 USB-Serial (UART) IC
So, why is ttyUSB2 gone and are ttyUSB[01] still available??
If I then remove (mark the second line!)
[ 103.600000] usb 1-2: USB disconnect, address 3
[ 103.610000] ftdi_sio ttyUSB2: FTDI USB Serial Device converter
now disconnected from ttyUSB2
[ 103.630000] ftdi_sio 1-2:1.0: device disconnected
and re-enter the external device life is OK!
[ 140.020000] usb 1-2: new full speed USB device using at91_ohci
and address 4
[ 140.200000] usb 1-2: configuration #1 chosen from 1 choice
[ 140.230000] ftdi_sio 1-2:1.0: FTDI USB Serial Device converter
detected
[ 140.250000] usb 1-2: Detected FT232RL
[ 140.250000] usb 1-2: Number of endpoints 2
[ 140.250000] usb 1-2: Endpoint 1 MaxPacketSize 64
[ 140.260000] usb 1-2: Endpoint 2 MaxPacketSize 64
[ 140.260000] usb 1-2: Setting MaxPacketSize 64
[ 140.270000] usb 1-2: FTDI USB Serial Device converter now
attached to ttyUSB2
# ls -l /dev/ttyU*
crw-rw---- 1 root dialout 188, 0 Jan 1 1970
/dev/ttyUSB0
crw-rw---- 1 root dialout 188, 1 Jan 1 1970
/dev/ttyUSB1
crw-rw---- 1 root dialout 188, 2 Dec 10 02:18
/dev/ttyUSB2
# lsusb
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0403:6010 Future Technology Devices
International, Ltd FT2232C Dual USB-UART/FIFO IC
Bus 001 Device 004: ID 0403:6001 Future Technology Devices
International, Ltd FT232 USB-Serial (UART) IC
Any ideas??
Thanks!
Jaap
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