Am Freitag, 1. Dezember 2006 19:10 schrieb Phil Drain:
> 1) With regard to USB in general, how does one logically detach a single
> device from a built-in driver (that is, NOT physically remove it from the
> system) without unloading the driver itself? Specifically, I need to detach
> an MSC device from the Kernel driver so I can claim it with a custom user
> mode driver (with root privileges) that allows access to a manufacturing
> interface for re-configuration and diagnostics. I don't want to shut down
> the Kernel driver because I want the other attached MSC devices to continue
> to operate. I would need to re-attach the device to the Kernel driver at the
> close of the app.
bind/unbind entries of sysfs. If you need it to work on 2.4, ioctl through
usbfs.
> 2) With regard to HID ..... There are many advantages to designing a USB
> device so it binds to the HID driver, even if it's not a "traditional" HID
> device. Indeed, since HID is universal across almost all host environments I
> develop most custom devices that don't already fall into a pre-defined USB
> class as HID class devices with a vendor defined interface so that my client
> has access to most platforms without the need to distribute a driver.
>
> So, getting to my question ...... If I may use a WIN example, on the device
> I define a simple "In" buffer and a simple "Out" buffer in the report
> descriptor then in the WIN app, I find the device, open it then use the
> readFile() & writeFile() calls. Does the GNU/Linux HID subsystem support
> such a mechanism? I prefer not to do as in (1) above ....
HID devices that are not genuine input devices are bound to the hiddev driver.
It appears as a normal character device.
HTH
Oliver
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