Dear Alan, On 13.02.08, Alan Stern wrote: > On Wed, 13 Feb 2008 [EMAIL PROTECTED] wrote: > > I have problems with a usb device (mp3 player) which is handled by the > > kernel modules in a wrong way. It is a usb 2.0 device (which behaves > > as such on e.g. Mac OS X), but with the linux kernel (2.6.22-3 debian > > kernel) I encounter only about 1MB/min of data transfer. > > > > A look into /proc/bus/usb/devices shows that the device is handled by > > the ohci module instead of the ehci module. Can anybody explain to me > > how to fix (debug) this problem? I am a bit lost with the usb modules, > > which do not seem to have a debug option argument. > > You can start by looking at the output from dmesg. If that doesn't > provide enough information you can enable debugging by turning on > CONFIG_USB_DEBUG -- it's a configuration setting rather than a module > parameter.
I have recompiled the kernel with USB debugging, and now I see explicitly that EHCI hands over the device to its companion driver OHCI (see below). However, I do not yet know why this happens and how I can avoid it and have the device handled by EHCI at full speed. Is it sufficient to create a new entry in unusual_dev.h? How do I specify the capability of USB2.0 there? Michael ----- output from dmesg ---- Feb 13 19:11:00 pugliese kernel: hub 2-0:1.0: hub_resume Feb 13 19:11:00 pugliese kernel: ehci_hcd 0000:00:0b.1: resume root hub Feb 13 19:11:00 pugliese kernel: hub 2-0:1.0: state 7 ports 8 chg 0000 evt 0000 Feb 13 19:11:00 pugliese kernel: ehci_hcd 0000:00:0b.1: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT Feb 13 19:11:00 pugliese kernel: hub 2-0:1.0: port 2, status 0501, change 0001, 480 Mb/s Feb 13 19:11:00 pugliese kernel: hub 2-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501 Feb 13 19:11:00 pugliese kernel: ehci_hcd 0000:00:0b.1: port 2 full speed --> companion Feb 13 19:11:00 pugliese kernel: ehci_hcd 0000:00:0b.1: GetStatus port 2 status 003001 POWER OWNER sig=se0 CONNECT Feb 13 19:11:00 pugliese kernel: hub 2-0:1.0: port 2 not reset yet, waiting 50ms Feb 13 19:11:00 pugliese kernel: usb usb1: usb resume Feb 13 19:11:00 pugliese kernel: usb usb1: finish resume Feb 13 19:11:00 pugliese kernel: hub 1-0:1.0: hub_resume Feb 13 19:11:00 pugliese kernel: ohci_hcd 0000:00:0b.0: wakeup root hub Feb 13 19:11:00 pugliese kernel: ehci_hcd 0000:00:0b.1: GetStatus port 2 status 003802 POWER OWNER sig=j CSC Feb 13 19:11:00 pugliese kernel: hub 2-0:1.0: state 7 ports 8 chg 0000 evt 0004 Feb 13 19:11:00 pugliese kernel: hub 1-0:1.0: state 7 ports 8 chg 0000 evt 0000 Feb 13 19:11:00 pugliese kernel: ohci_hcd 0000:00:0b.0: GetStatus roothub.portstatus [1] = 0x00010101 CSC PPS CCS Feb 13 19:11:00 pugliese kernel: hub 1-0:1.0: port 2, status 0101, change 0001, 12 Mb/s Feb 13 19:11:00 pugliese kernel: hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x101 Feb 13 19:11:00 pugliese kernel: ohci_hcd 0000:00:0b.0: GetStatus roothub.portstatus [1] = 0x00100103 PRSC PPS PES CCS Feb 13 19:11:00 pugliese kernel: usb 1-2: new full speed USB device using ohci_hcd and address 2 Feb 13 19:11:01 pugliese kernel: ohci_hcd 0000:00:0b.0: GetStatus roothub.portstatus [1] = 0x00100103 PRSC PPS PES CCS Feb 13 19:11:01 pugliese kernel: usb 1-2: ep0 maxpacket = 16 Feb 13 19:11:01 pugliese kernel: usb 1-2: default language 0x0409 Feb 13 19:11:01 pugliese kernel: usb 1-2: new device strings: Mfr=1, Product=2, SerialNumber=0 Feb 13 19:11:01 pugliese kernel: usb 1-2: Product: USB Mass Storage Device 2.0 Feb 13 19:11:01 pugliese kernel: usb 1-2: Manufacturer: NewTech Inc. Feb 13 19:11:01 pugliese kernel: usb 1-2: uevent Feb 13 19:11:01 pugliese kernel: usb 1-2: usb_probe_device Feb 13 19:11:01 pugliese kernel: usb 1-2: configuration #1 chosen from 1 choice Feb 13 19:11:01 pugliese kernel: usb 1-2: adding 1-2:1.0 (config #1, interface 0) Feb 13 19:11:01 pugliese kernel: usb 1-2:1.0: uevent Feb 13 19:11:01 pugliese kernel: usb 1-2:1.0: uevent Feb 13 19:11:01 pugliese kernel: libusual 1-2:1.0: usb_probe_interface Feb 13 19:11:01 pugliese kernel: libusual 1-2:1.0: usb_probe_interface - got id Feb 13 19:11:01 pugliese kernel: usb-storage 1-2:1.0: usb_probe_interface Feb 13 19:11:01 pugliese kernel: usb-storage 1-2:1.0: usb_probe_interface - got id Feb 13 19:11:01 pugliese kernel: usb-storage: USB Mass Storage device detected Feb 13 19:11:01 pugliese kernel: usb-storage: -- associate_dev Feb 13 19:11:01 pugliese kernel: usb-storage: Vendor: 0x04e8, Product: 0x9826, Revision: 0x0100 Feb 13 19:11:01 pugliese kernel: usb-storage: Interface Subclass: 0x06, Protocol: 0x50 Feb 13 19:11:01 pugliese kernel: usb-storage: Transport: Bulk Feb 13 19:11:01 pugliese kernel: usb-storage: Protocol: Transparent SCSI Feb 13 19:11:01 pugliese kernel: scsi3 : SCSI emulation for USB Mass Storage devices Feb 13 19:11:01 pugliese kernel: usb-storage: *** thread sleeping. Feb 13 19:11:01 pugliese kernel: usb-storage: device found at 2 Feb 13 19:11:01 pugliese kernel: usb-storage: waiting for device to settle before scanning Feb 13 19:11:01 pugliese kernel: drivers/usb/core/inode.c: creating file '002' - To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
