Dear all,
I want to use a modem like CDC-ACM device. Its custom made and is using a Microchip PIC18F2550 micro controller. The device works without any problem under Windows, Mac OS and Ubuntu. However when I try to use it with my Synology DS411slim NAS (uname -a Linux Speicherschwein 2.6.32.12 #1922 Sun Sep 4 02:10:58 CST 2011 armv5tel GNU/Linux) I'm always getting Input/Output Errors when I try to cat the device (/dev/ttyACM0). The NAS has an EHCI USB host controller.
I have recompiled the kernel module with #define Debug and I'm getting the following error message - Please also note the "broken pipe" error of lsusb -v
[80713.600000] usb 1-1.3: new full speed USB device using orion-ehci and address 33
[80713.710000] usb 1-1.3: configuration #1 chosen from 1 choice
[80713.710000] cdc_acm 1-1.3:1.0: This device cannot do calls on its own. It is not a modem.
[80713.720000] cdc_acm 1-1.3:1.0: The data interface has switched endpoints
[80713.720000] drivers/usb/class/cdc-acm.c: interfaces are valid
[80713.720000] cdc_acm 1-1.3:1.0: ttyACM0: USB ACM device
[80713.760000] drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x22 val: 0x0 len: 0x0 result: 0
[80713.760000] drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x20 val: 0x0 len: 0x7 result: 7
[80713.760000] Got empty serial number. Generate serial number from product.
[80749.480000] drivers/usb/class/cdc-acm.c: Entering acm_tty_open.
[80749.480000] drivers/usb/class/cdc-acm.c: usb_submit_urb(ctrl irq) failed
[80749.480000] tty_port_close_start: tty->count = 1 port count = 0.
[80749.500000] drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x22 val: 0x0 len: 0x0 result: 0
Does anyone has an idea what this error message (usb_submit_urb(ctrl irq) failed) means and how it can be fixed?
Please find attached the output of lsusb and cat /proc/bus/usb/devices
Thank you very much!
Alex
lsusb -v gives
Bus 001 Device 033: ID 04d8:000a Microchip Technology, Inc.
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 2 Communications
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x04d8 Microchip Technology, Inc.
idProduct 0x000a
bcdDevice 0.01
iManufacturer 1
iProduct 2
iSerial 0
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 1 AT-commands (v.25ter)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC ACM:
bmCapabilities 0x02
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
CDC Call Management:
bmCapabilities 0x00
bDataInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 2
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 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 0x83 EP 3 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
cannot read device status, Broken pipe (32)
cat /proc/bus/usb/devices gives
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 1, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=1d6b ProdID=0002 Rev= 2.06
S: Manufacturer=Linux 2.6.32.12 ehci_hcd
S: Product=Marvell Orion EHCI
S: SerialNumber=orion-ehci.0
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=256ms
T: Bus=01 Lev=02 Prnt=02 Port=99 Cnt=01 Dev#= 33 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=04d8 ProdID=000a Rev= 0.01
S: Manufacturer=sprut (www.sprut.de)
S: Product=ADSB-PIC V.08 (sprut 2011)
S: SerialNumber=9dac9dad9fbfcbbeccbccfe7c7ffcfe1
C:* #Ifs= 2 Cfg#= 1 Atr=c0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=01 Driver=cdc_acm
E: Ad=82(I) Atr=03(Int.) MxPS= 8 Ivl=2ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_acm
E: Ad=03(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=83(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
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