Hi, On Mon, Jun 4, 2012 at 7:52 AM, Haris Ibrahim K. V. <blucalvin@xxxxxxxxx> wrote: > Hi all, > > I have my host system (Ubuntu 10.04) connected to my Beagle Board XM > running Angstrom distro. > > I have a cross over ethernet connection for 'ssh'ing purposes and a > USB OTG cable connection as well. > > I loaded a usb gadget driver on my beagle board called g_audio.ko. The > host side demsg command showed: > > [ 703.460202] usb 1-2: new high speed USB device using ehci_hcd and address 4 > [ 703.593970] usb 1-2: configuration #1 chosen from 1 choice > [ 703.743828] usbcore: registered new interface driver snd-usb-audio > > On the beagle board 'dmesg' showed: > > [ 153.068389] g_audio gadget: Hardware params: access 3, format 2, > channels 2, rate 48000 > [ 153.082489] g_audio gadget: audio_buf_size 48000, req_buf_size 200, > req_count 256 > [ 153.095855] g_audio gadget: Linux USB Audio Gadget, version: Dec 18, 2008 > [ 153.108581] g_audio gadget: g_audio ready > [ 153.118347] musb-hdrc musb-hdrc: MUSB HDRC host driver > [ 153.129821] musb-hdrc musb-hdrc: new USB bus registered, assigned > bus number 2 > [ 153.143249] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002 > [ 153.156250] usb usb2: New USB device strings: Mfr=3, Product=2, > SerialNumber=1 > [ 153.169403] usb usb2: Product: MUSB HDRC host driver > [ 153.180023] usb usb2: Manufacturer: Linux 3.0.29+ musb-hcd > [ 153.191162] usb usb2: SerialNumber: musb-hdrc > [ 153.201812] hub 2-0:1.0: USB hub found > [ 153.211090] hub 2-0:1.0: 1 port detected > [ 153.645568] g_audio gadget: high speed config #1: Linux USB Audio Gadget > > I hope that means both the systems have recognized the existence of that driver. > > I wanted to test if the connection was fine. Searching for a way, I > found this link: linux-usb<dot>org/usbtest/ > > I downloaded both the testusb.c and test.sh files from there. Upon > compiling and running testusb, it showed: > > usbfs files are missing > > I compiled a new kernel with "Device Drivers->USB support" as option > "USB device filesystem" enabled. But that only brought me till > /proc/bus/usb/ . The 'devices' inside that was still not there. > > After searching I did: > > sudo ln -s /sys/kernel/debug/usb/devices /proc/bus/usb/devices > > Now I again ran ./testusb -a and got the output: > > no test devices recognized g_audio is not a test device. You can perform the same test with g_zero. You can have a look at testusb.c to check what all is recognized as test device. You'll see gadget zero as a test device :-) /* "gadget zero", Linux-USB test software */ if (dev->idVendor == 0x0525 && dev->idProduct == 0xa4a0) return 1; > > Why hasn't my gadget driver been recognized by this program? Is there > a work around where I can check whether my beagle board has been > detected via the USB OTG cable? Yes. You can use *lsusb* in your host pc to see the list of attached devices. You'll find something like *gadget audio* if you had g_audio or *gadget zero* if you have g_zero. Regards Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
