Hi,

I am using LPC1768 as CDC device connected to PXA168 which is running Linux. On LPC side, I have drivers. I have also enabled the PXA linux drivers for usb-serial and cdc-acm drive. When I bootup the board, I get following:-

[ 2.539060] usb 1-1.3: new full speed USB device using pxau2h-ehci and address 4
[ 2.581029] usb 1-1.3: New USB device found, idVendor=1fc9, idProduct=2002
[ 2.587908] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2.595241] usb 1-1.3: Product: NXP LPC17xx VCOM
[ 2.599996] usb 1-1.3: Manufacturer: NXP SEMICOND
[ 2.604786] usb 1-1.3: SerialNumber: DEMO00000000




# cat /proc/bus/usb/devices

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 2.6.34 ehci_hcd
S: Product=Marvell PXA SOC EHCI Host Controller
S: SerialNumber=pxau2h-ehci
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=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 4
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS=64 #Cfgs= 1
P: Vendor=05e3 ProdID=0608 Rev=77.64
S: Product=USB2.0 Hub
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 1 Ivl=256ms

T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1908 ProdID=0221 Rev= 1.02
S: Manufacturer=Generic
S: Product=USB2.0 Device
S: SerialNumber=20090909180003
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms

**T: Bus=01 Lev=02 Prnt=02 Port=02 Cnt=02 Dev#= 4 Spd=12 MxCh= 0
D: Ver= 2.00 Cls=02(comm.) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
P: Vendor=1fc9 ProdID=2002 Rev= 1.00
S: Manufacturer=NXP SEMICOND
S: Product=NXP LPC17xx VCOM
S: SerialNumber=DEMO00000000
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=100mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=02 Prot=00 Driver=(none)
E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=2ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=(none)
E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms
E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms**


Now My LPC does not detect any driver. This LPC works fine when used to connect with PC having Windows but there too If I connect to Linux PC, I dont get it running.

Can anyone help me understanding the driver for the linux and which interface will be used to

This device possibly uses a custom driver, because the USB detection is absolutely fine. Are you sure you have the driver either in the kernel or compiled separately? You probably need to compile it and load manually via insmod or modprobe.