Hi Chris, Sorry, I didn't read your next email before reply. Anyway, I can't help you much, but maybe I can help you translating those byte sequences. Arranged in host-device dialog: down 25.875: 55 53 42 43 -> dCBWSignature: Command from host to device 08 8d e2 81 -> dCBWTag: Command tag, reply the answer with this tag .... -> There should be extra several bytes here, regarding the command that host issued up 25.875: 55 53 42 53 -> dCSWSignature: Command reply from device to host 08 8d e2 81 -> dCSWTag: This is reply to 0x81e28d08 command ... -> There should be another extra several bytes here, regarding the command status Most of your packets are consist of standard MSD query. However, there are patterns that I don't recognize. These packets have no CBW/CSW signature. Either it's a corrupted command or part of the data from last MSD query (but I don't think it is). down 25.875: 00 00 00 00 7f 20 00 00 up 25.875: 70 00 02 00 00 00 00 0a down 25.891: 00 00 00 00 00 00 00 0a up 25.891: 70 00 02 00 00 00 00 0a down 25.906: 70 00 02 00 00 00 00 0a up 25.906: 70 00 02 00 00 00 00 0a The only command that's allowed in MSD bulk endpoint is just CBW/CSW. Other commands (including MSD class specific command) should be delivered through default/control pipe. That is if the device strictly following the USB standard (and if my memory about USB standard is still intact =D ). Hope that helps. Regards, -daniel On Fri, 2009-02-13 at 15:14 +0100, Christoph Gysin wrote: > > The buttons on USB devices usually are connected into HID interface. I > > guess that's how your SanDisk card reader button communicates too. > > Unfortunately this is not the case. > > > If you look at the `lsusb -v` output you'll see how many interfaces that > > it implements. The MSD (Mass Storage Class) is the data channel, which > > normally unrelated to buttons or leds on the device. > > My device has only one interface type 08 (mass storage) with two > endpoints type bulk. No interrupt enpoint unfortuantely. > > > This page may help you: http://www.frogmouth.net/hid-doco/linux-hid.html > > Thanks, I'll check it out. > > > Also, your USB endpoints info can be viewed > > in /sys/class/usb_endpoint/usbdev > > I prefer usbview by GregKH. > > Thanks, > Chris -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
