Hi all,
For a hobby project I'm writing firmware for a LPC214x (ARM7)
microcontroller to implement a simple serial-over-USB port.
I think I have the basics covered and the device appears to work
under windows, however under linux I'm seeing a
"Generic device with no bulk out, not allowed." message.
The usbserial eventually does create a /dev/ttyUSB0 file.
Is it normal to see the message mentioned above?
Or is there anything wrong with the configuration of my device?
Or perhaps there is something wrong with the linux kernel driver?
I tried to conform to the USB CDC specs.
My device has two interfaces, a communication class interface
with an interrupt-in endpoint and a data class interface with
two bulk (in and out) endpoints.
I'm attaching the syslog, dmesg and lsusb -v output.
Thanks,
Bertrik
Bus 005 Device 004: ID ffff:0005
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0xffff
idProduct 0x0005
bcdDevice 1.00
iManufacturer 1 LPCUSB
iProduct 2 USBSerial
iSerial 3 DEADC0DE
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 67
bNumInterfaces 2
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 0 None
iInterface 0
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x00
bDataInterface 0
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 255
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x05 EP 5 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
Bus 005 Device 002: ID 04b4:6560 Cypress Semiconductor Corp. CY7C65640 USB-2.0
"TetraHub"
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 2 TT per port
bMaxPacketSize0 64
idVendor 0x04b4 Cypress Semiconductor Corp.
idProduct 0x6560 CY7C65640 USB-2.0 "TetraHub"
bcdDevice 0.0b
iManufacturer 0
iProduct 0
iSerial 0
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 41
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 1 Single TT
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 12
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 2 TT per port
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 12
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 4
wHubCharacteristic 0x0089
Per-port power switching
Per-port overcurrent protection
TT think time 8 FS bits
Port indicators
bPwrOn2PwrGood 50 * 2 milli seconds
bHubContrCurrent 100 milli Ampere
DeviceRemovable 0xf0
PortPwrCtrlMask 0xc0
Hub Port Status:
Port 1: 0000.0100 power
Port 2: 0000.0100 power
Port 3: 0000.0100 power
Port 4: 0000.0103 power enable connect
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0001
Self Powered
Bus 005 Device 001: ID 0000:0000
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 9 Hub
bDeviceSubClass 0 Unused
bDeviceProtocol 1 Single TT
bMaxPacketSize0 64
idVendor 0x0000
idProduct 0x0000
bcdDevice 2.06
iManufacturer 3 Linux 2.6.15-19-k7 ehci_hcd
iProduct 2 EHCI Host Controller
iSerial 1 0000:00:09.2
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 25
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xc0
Self Powered
MaxPower 0mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 9 Hub
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0002 1x 2 bytes
bInterval 12
Hub Descriptor:
bLength 9
bDescriptorType 41
nNbrPorts 4
wHubCharacteristic 0x000a
No power switching (usb 1.0)
Per-port overcurrent protection
TT think time 8 FS bits
bPwrOn2PwrGood 10 * 2 milli seconds
bHubContrCurrent 0 milli Ampere
DeviceRemovable 0xa8
PortPwrCtrlMask 0xe6
Hub Port Status:
Port 1: 0000.0100 power
Port 2: 0000.0100 power
Port 3: 0000.0503 highspeed power enable connect
Port 4: 0000.0100 power
Device Status: 0x0001
Self Powered
Linux ubuntu 2.6.15-19-k7 #1 SMP PREEMPT Mon Mar 20 18:21:44 UTC 2006 i686
GNU/Linux
Mar 27 19:01:13 localhost kernel: [4295004.967000] usbcore: registered new
driver usbserial
Mar 27 19:01:13 localhost kernel: [4295004.970000]
drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
Mar 27 19:01:13 localhost kernel: [4295004.971000] usbserial_generic 5-3.4:1.0:
generic converter detected
Mar 27 19:01:13 localhost kernel: [4295004.971000] usbserial_generic: probe of
5-3.4:1.0 failed with error -5
Mar 27 19:01:13 localhost kernel: [4295004.972000] usbserial_generic 5-3.4:1.1:
generic converter detected
Mar 27 19:01:13 localhost kernel: [4295004.974000] usb 5-3.4: generic converter
now attached to ttyUSB0
Mar 27 19:01:13 localhost kernel: [4295004.975000] usbcore: registered new
driver usbserial_generic
Mar 27 19:01:13 localhost kernel: [4295004.975000]
drivers/usb/serial/usb-serial.c: USB Serial Driver core
[4295004.967000] usbcore: registered new driver usbserial
[4295004.967000] drivers/usb/serial/usb-serial.c: Had to override the open usb
serial operation with the generic one.
[4295004.967000] drivers/usb/serial/usb-serial.c: Had to override the write usb
serial operation with the generic one.
[4295004.968000] drivers/usb/serial/usb-serial.c: Had to override the close usb
serial operation with the generic one.
[4295004.968000] drivers/usb/serial/usb-serial.c: Had to override the
write_room usb serial operation with the generic one.
[4295004.968000] drivers/usb/serial/usb-serial.c: Had to override the
chars_in_buffer usb serial operation with the generic one.
[4295004.969000] drivers/usb/serial/usb-serial.c: Had to override the
read_bulk_callback usb serial operation with the generic one.
[4295004.969000] drivers/usb/serial/usb-serial.c: Had to override the
write_bulk_callback usb serial operation with the generic one.
[4295004.970000] drivers/usb/serial/usb-serial.c: USB Serial support registered
for generic
[4295004.971000] drivers/usb/serial/usb-serial.c: descriptor matches
[4295004.971000] drivers/usb/serial/usb-serial.c: found interrupt in on
endpoint 0
[4295004.971000] usbserial_generic 5-3.4:1.0: generic converter detected
[4295004.971000] usbserial_generic 5-3.4:1.0: Generic device with no bulk out,
not allowed.
[4295004.971000] usbserial_generic: probe of 5-3.4:1.0 failed with error -5
[4295004.972000] drivers/usb/serial/usb-serial.c: descriptor matches
[4295004.972000] drivers/usb/serial/usb-serial.c: found bulk out on endpoint 0
[4295004.972000] drivers/usb/serial/usb-serial.c: found bulk in on endpoint 1
[4295004.972000] usbserial_generic 5-3.4:1.1: generic converter detected
[4295004.973000] drivers/usb/serial/usb-serial.c: get_free_serial 1
[4295004.973000] drivers/usb/serial/usb-serial.c: get_free_serial - minor base
= 0
[4295004.973000] drivers/usb/serial/usb-serial.c: usb_serial_probe - setting up
1 port structures for this device
[4295004.973000] drivers/usb/serial/usb-serial.c: usb_serial_probe -
registering ttyUSB0
[4295004.974000] usb 5-3.4: generic converter now attached to ttyUSB0
[4295004.975000] usbcore: registered new driver usbserial_generic
[4295004.975000] drivers/usb/serial/usb-serial.c: USB Serial Driver core
[4295005.013000] drivers/usb/serial/usb-serial.c: serial_open
[4295005.013000] drivers/usb/serial/generic.c: usb_serial_generic_open - port 0
[4295005.013000] drivers/usb/serial/usb-serial.c: serial_ioctl - port 0, cmd
0x541e
[4295005.013000] drivers/usb/serial/usb-serial.c: serial_close - port 0
[4295005.013000] drivers/usb/serial/generic.c: usb_serial_generic_close - port 0
[4295005.013000] drivers/usb/serial/generic.c: generic_cleanup - port 0
[4295005.013000] drivers/usb/serial/generic.c:
usb_serial_generic_read_bulk_callback - port 0
[4295005.013000] drivers/usb/serial/generic.c:
usb_serial_generic_read_bulk_callback - nonzero read bulk status received: -2
