I have a problem on embedded platform running with very limited toolchain. I have TI Hub connected to USB host on chip. This hub seems to be detected properly (dmesg attached), but sierra wireless SL6087 device that I connect to it, doesn't appear in system. Unfortunately I can't use USB Device Filesystem - I have no /proc/bus/usb. What I can do is read /sys direct.
I get following system log with and without modul connected. I also don't see any communication on D+ and D- lines. kernel 2.6.21.
# dmesg | grep -e hub -e usb usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb
usbmon: debugfs is not available rt3xxx-ohci rt3xxx-ohci: roothub.a 02000202 POTPGT=2 NPS NDP=2(2) rt3xxx-ohci rt3xxx-ohci: roothub.b 00000000 PPCM=0000 DR=0000 rt3xxx-ohci rt3xxx-ohci: roothub.status 00008000 DRWE rt3xxx-ohci rt3xxx-ohci: roothub.portstatus [0] 0x00000100 PPS rt3xxx-ohci rt3xxx-ohci: roothub.portstatus [1] 0x00000100 PPS usb usb1: default language 0x0409 usb usb1: new device strings: Mfr=3, Product=2, SerialNumber=1 usb usb1: Product: RT3xxx OHCI Controller usb usb1: Manufacturer: Linux 2.6.21 ohci_hcd usb usb1: SerialNumber: rt3xxx-ohci usb usb1: uevent usb usb1: usb_probe_device usb usb1: configuration #1 chosen from 1 choice usb usb1: adding 1-0:1.0 (config #1, interface 0) usb 1-0:1.0: uevent hub 1-0:1.0: usb_probe_interface hub 1-0:1.0: usb_probe_interface - got id hub 1-0:1.0: USB hub found hub 1-0:1.0: 2 ports detected hub 1-0:1.0: standalone hub hub 1-0:1.0: no power switching (usb 1.0) hub 1-0:1.0: global over-current protection hub 1-0:1.0: power on to power good time: 4ms hub 1-0:1.0: local power source is good hub 1-0:1.0: no over-current condition exists hub 1-0:1.0: trying to enable port power on non-switchable hub hub 1-0:1.0: state 7 ports 2 chg 0000 evt 0000 usbcore: registered new interface driver usbserial drivers/usb/serial/usb-serial.c: USB Serial support registered for generic usbcore: registered new interface driver usbserial_generic drivers/usb/serial/usb-serial.c: USB Serial Driver core drivers/usb/serial/usb-serial.c: USB Serial support registered for Sierra USB modem usbcore: registered new interface driver sierra drivers/usb/serial/sierra.c: USB Driver for Sierra Wireless USB modems: v.1.7.40