Re: [Libusb-devel] libusb silently ignores permission errors

Add linux-usb-devel in CC. Hopefully this is ok.
Problem: USBview can see the device but not libusb/lsusb.

On 9/22/07, Xiaofan Chen <[email protected]> wrote:
> > Just yesterday I tried the PICDEM FS USB bootloader under
> > Ubuntu 7.04 and it is not working well under it. dmesg shows
> > the device but lsusb does not show it.
> >
> > So I am thinking that there is a problem with the Debian kernel
> > which Ubuntu kernel is based on. I have also saw similar report
> > on the Microchip forum. The same device works fine under the
> > older Ubuntu 6.06. I also heard that Debian Sid users suffer the
> > same problem.
> > http://forum.microchip.com/tm.aspx?m=283378
> >
> > I then tried Greg KH's USBView and it actually list the device.
> > Strange. Maybe you can try USBView and see if it actually helps.
> > http://www.kroah.com/linux/usb/
> >
> > USBView is available for many distributions including Ubuntu.
> > It seem to me that it does not use libusb.
>
> More details on Ubuntu 7.04:
> mcuee@mcuee-desktop:~$ sudo lsusb (same result without sudo)
> Bus 003 Device 001: ID 0000:0000
> Bus 002 Device 001: ID 0000:0000
> Bus 001 Device 001: ID 0000:0000
>
> mcuee@mcuee-desktop:~$ dmesg | tail
> [  920.824000] usb 2-1: new full speed USB device using ohci_hcd and address 24
> [  921.040000] usb 2-1: configuration #1 chosen from 1 choice
>
> mcuee@mcuee-desktop:~$ ls -la /dev/bus/usb/002/024
> crw-rw-r-- 1 root root 189, 151 2007-09-22 11:01 /dev/bus/usb/002/024
>
> mcuee@mcuee-desktop:~$ cat /proc/bus/usb/devices
> <only the 04d8:000b usb device is shown here>
> T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 23 Spd=12  MxCh= 0
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
> P:  Vendor=04d8 ProdID=000b Rev= 0.00
> C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr=100mA
> I:  If#= 0 Alt= 0 #EPs= 2 Cls=00(>ifc ) Sub=00 Prot=00 Driver=(none)
> E:  Ad=01(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
> E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
>
> USBView output for the PICDEM FS USB bootlaoder:
> Oops I can not copy paste from  USBview.
> Maybe a console version of USBview can replace lsusb very well.
>
> And from this experience, it seems to me that the OP does have a point.
> But I am still think Debian kernel has something to do with this. It randomly
> disconnects the bootloader device.
>
> mcuee@mcuee-desktop:~$ uname -a
> Linux mcuee-desktop 2.6.20-16-generic #2 SMP Fri Aug 31 00:55:27 UTC
> 2007 i686 GNU/Linux
>
> And this has nothing to do with udev. I set up the correct udev rule
> and unplug and
> plug in the device again.
>
> mcuee@mcuee-desktop:~$ dmesg | tail
> [  523.424000] usb 2-1: configuration #1 chosen from 1 choice
> [  920.644000] usb 2-1: USB disconnect, address 23
> [  920.824000] usb 2-1: new full speed USB device using ohci_hcd and address 24
> [  921.040000] usb 2-1: configuration #1 chosen from 1 choice
> [ 1430.328000] usb 2-1: USB disconnect, address 24
> [ 1437.640000] usb 2-1: new full speed USB device using ohci_hcd and address 25
> [ 1437.848000] usb 2-1: configuration #1 chosen from 1 choice
> [ 1450.116000] usb 2-1: USB disconnect, address 25
> [ 1450.360000] usb 2-1: new full speed USB device using ohci_hcd and address 26
> [ 1450.572000] usb 2-1: configuration #1 chosen from 1 choice
>
> mcuee@mcuee-desktop:~$ ls -la /dev/bus/usb/002/026
> crw-rw-r-- 1 root microchip 189, 153 2007-09-22 11:10 /dev/bus/usb/002/026
> mcuee@mcuee-desktop:~$ groups mcuee
> mcuee : mcuee adm dialout cdrom floppy audio dip video plugdev lpadmin
> scanner admin microchip
>
> mcuee@mcuee-desktop:~$ lsusb
> Bus 003 Device 001: ID 0000:0000
> Bus 002 Device 001: ID 0000:0000
> Bus 001 Device 001: ID 0000:0000
>
> And USBview still can see the device.
>
> Now I am thinking this is not a lsusb problem, not a usb kernel problem
> but a Debian/ubuntu problem.
>

Hmm, I built a new kernel 2.6.22.7 from kernel.org and the problem
remains. So maybe this is still a libusb/lsusb problem. I will dig further.

For lsusb replacement, I think a console version of usbview will do.
However I can not get the bootloader host application to work
since libusb does not see the device.

mcuee@mcuee-desktop:~$ uname -a
Linux mcuee-desktop 2.6.22.7 #1 SMP Sat Sep 22 22:40:02 SGT 2007 i686 GNU/Linux
mcuee@mcuee-desktop:~$ groups mcuee
mcuee : mcuee adm dialout cdrom floppy audio dip video plugdev lpadmin
scanner admin microchip

mcuee@mcuee-desktop:~$ ls -la /dev/bus/usb/002
total 0
drwxr-xr-x 2 root root            80 2007-09-23 10:11 .
drwxr-xr-x 6 root root           140 2007-09-23 09:40 ..
crw-rw-r-- 1 root root      189, 128 2007-09-23 17:40 001
crw-rw-r-- 1 root microchip 189, 149 2007-09-23 10:11 022

mcuee@mcuee-desktop:~$ ls -la /proc/bus/usb/002
total 0
drwxr-xr-x 2 root root            80 2007-09-23 10:11 .
drwxr-xr-x 6 root root           140 2007-09-23 09:40 ..
crw-rw-r-- 1 root root      189, 128 2007-09-23 17:40 001
crw-rw-r-- 1 root microchip 189, 149 2007-09-23 10:11 022

mcuee@mcuee-desktop:~/Desktop/build/fsusb/fsusb-0.1.11-2$ ./fsusb
--read test.hex
Locating USB Microchip(tm) PICDEM-FS USB(tm) (vendor 0x04d8/product 0x000b)
Fatal error> Could not find USB PICDEM device--
you might try lsusb to see if it's actually there.

mcuee@mcuee-desktop:~/Desktop/build/fsusb/fsusb-0.1.11-2$ lsusb
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000

This is really strange!

This is the dmesg output. Maybe this has something to do with the
problem but I am not sure.

[ 2343.820000] usb usb2: usb resume
[ 2343.820000] usb usb2: finish resume
[ 2343.820000] hub 2-0:1.0: hub_resume
[ 2343.832000] ohci_hcd 0000:00:02.1: wakeup root hub
[ 2343.912000] hub 2-0:1.0: state 7 ports 4 chg 0000 evt 0000
[ 2343.912000] ohci_hcd 0000:00:02.1: GetStatus roothub.portstatus [0]
= 0x00030100 PESC CSC PPS
[ 2343.912000] hub 2-0:1.0: port 1, status 0100, change 0003, 12 Mb/s
[ 2343.912000] usb 2-1: USB disconnect, address 26
[ 2343.912000] usb 2-1: unregistering device
[ 2343.912000] usb 2-1: usb_disable_device nuking all URBs
[ 2343.912000] usb 2-1: unregistering interface 2-1:1.0
[ 2343.912000] DEV: Unregistering device. ID = 'usbdev2.26_ep01'
[ 2343.912000] PM: Removing info for No Bus:usbdev2.26_ep01
[ 2343.912000] usb_endpoint usbdev2.26_ep01: ep_device_release called
for usbdev2.26_ep01
[ 2343.912000] DEV: Unregistering device. ID = 'usbdev2.26_ep81'
[ 2343.912000] PM: Removing info for No Bus:usbdev2.26_ep81
[ 2343.912000] usb_endpoint usbdev2.26_ep81: ep_device_release called
for usbdev2.26_ep81
[ 2343.912000] bus usb: remove device 2-1:1.0
[ 2343.912000] PM: Removing info for usb:2-1:1.0
[ 2343.912000] usb 2-1:1.0: uevent
[ 2343.912000] usb 2-1:1.0: uevent
[ 2343.912000] bus usb: remove device 2-1
[ 2343.912000] DEV: Unregistering device. ID = 'usbdev2.26'
[ 2343.912000] PM: Removing info for No Bus:usbdev2.26
[ 2343.912000] device_create_release called for usbdev2.26
[ 2343.912000] DEV: Unregistering device. ID = 'usbdev2.26_ep00'
[ 2343.912000] PM: Removing info for No Bus:usbdev2.26_ep00
[ 2343.912000] usb_endpoint usbdev2.26_ep00: ep_device_release called
for usbdev2.26_ep00
[ 2343.912000] PM: Removing info for usb:2-1
[ 2343.912000] usb 2-1: uevent
[ 2344.040000] hub 2-0:1.0: debounce: port 1: total 100ms stable 100ms
status 0x100
[ 2344.492000] usb usb3: usb resume
[ 2344.492000] usb usb3: finish resume
[ 2344.492000] hub 3-0:1.0: hub_resume
[ 2344.492000] ehci_hcd 0000:00:02.2: resume root hub
[ 2344.512000] hub 3-0:1.0: state 7 ports 8 chg 0000 evt 0000
[ 2344.512000] ehci_hcd 0000:00:02.2: GetStatus port 3 status 001803
POWER sig=j CSC CONNECT
[ 2344.512000] hub 3-0:1.0: port 3, status 0501, change 0001, 480 Mb/s
[ 2344.640000] hub 3-0:1.0: debounce: port 3: total 100ms stable 100ms
status 0x501
[ 2344.696000] ehci_hcd 0000:00:02.2: port 3 full speed --> companion
[ 2344.696000] ehci_hcd 0000:00:02.2: GetStatus port 3 status 003001
POWER OWNER sig=se0 CONNECT
[ 2344.696000] hub 3-0:1.0: port 3 not reset yet, waiting 50ms
[ 2344.752000] ehci_hcd 0000:00:02.2: GetStatus port 3 status 003802
POWER OWNER sig=j CSC
[ 2344.752000] hub 2-0:1.0: state 7 ports 4 chg 0000 evt 0002
[ 2344.752000] ohci_hcd 0000:00:02.1: GetStatus roothub.portstatus [0]
= 0x00010101 CSC PPS CCS
[ 2344.752000] hub 2-0:1.0: port 1, status 0101, change 0001, 12 Mb/s
[ 2344.880000] hub 2-0:1.0: debounce: port 1: total 100ms stable 100ms
status 0x101
[ 2345.000000] ohci_hcd 0000:00:02.1: GetStatus roothub.portstatus [0]
= 0x00100103 PRSC PPS PES CCS
[ 2345.056000] usb 2-1: new full speed USB device using ohci_hcd and address 27
[ 2345.176000] ohci_hcd 0000:00:02.1: GetStatus roothub.portstatus [0]
= 0x00100103 PRSC PPS PES CCS
[ 2345.252000] usb 2-1: ep0 maxpacket = 8
[ 2345.268000] usb 2-1: new device strings: Mfr=0, Product=0, SerialNumber=0
[ 2345.268000] DEV: registering device: ID = '2-1'
[ 2345.268000] PM: Adding info for usb:2-1
[ 2345.268000] bus usb: add device 2-1
[ 2345.268000] usb 2-1: uevent
[ 2345.268000] usb: Matched Device 2-1 with Driver usb
[ 2345.268000] usb: Probing driver usb with device 2-1
[ 2345.268000] usb 2-1: usb_probe_device
[ 2345.268000] DEV: registering device: ID = 'usbdev2.27_ep00'
[ 2345.268000] PM: Adding info for No Bus:usbdev2.27_ep00
[ 2345.268000] usb 2-1: configuration #1 chosen from 1 choice
[ 2345.268000] usb 2-1: adding 2-1:1.0 (config #1, interface 0)
[ 2345.268000] DEV: registering device: ID = '2-1:1.0'
[ 2345.268000] PM: Adding info for usb:2-1:1.0
[ 2345.268000] bus usb: add device 2-1:1.0
[ 2345.268000] usb 2-1:1.0: uevent
[ 2345.272000] usb 2-1:1.0: uevent
[ 2345.272000] DEV: registering device: ID = 'usbdev2.27_ep01'
[ 2345.272000] PM: Adding info for No Bus:usbdev2.27_ep01
[ 2345.272000] DEV: registering device: ID = 'usbdev2.27_ep81'
[ 2345.272000] PM: Adding info for No Bus:usbdev2.27_ep81
[ 2345.272000] DEV: registering device: ID = 'usbdev2.27'
[ 2345.272000] PM: Adding info for No Bus:usbdev2.27
[ 2345.272000] drivers/usb/core/inode.c: creating file '027'
[ 2345.272000] bound device '2-1' to driver 'usb'
[ 2345.272000] usb: Bound Device 2-1 to Driver usb
[ 2345.272000] hub 3-0:1.0: state 7 ports 8 chg 0000 evt 0008
[ 2345.272000] hub 2-0:1.0: state 7 ports 4 chg 0000 evt 0002
[ 2347.272000] usb 2-1: usb auto-suspend
[ 2347.288000] hub 3-0:1.0: hub_suspend
[ 2347.288000] ehci_hcd 0000:00:02.2: suspend root hub
[ 2347.288000] usb usb3: usb auto-suspend
[ 2349.288000] hub 2-0:1.0: hub_suspend
[ 2349.288000] ohci_hcd 0000:00:02.1: suspend root hub
[ 2349.288000] usb usb2: usb auto-suspend

Regards,
Xiaofan
http://mcuee.blogspot.com

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