Re: [Qemu-devel] USB support

[Fabrice Bellard]

Lonnie Mendez wrote:
> On Saturday 05 November 2005 11:10 am, Fabrice Bellard wrote: 
>
> > 1) The host OS must not use the USB device. It means in particular that 
> > no host OS driver must be present for that device. The solution I am 
> > using is to rename the host kernel module "usb-storage.o" to 
> > "usb-storage.o.disabled" so that it is not loaded by Linux. Then QEMU 
> > can exclusively access to the corresponding host storage USB device. The 
> > same apply to every other type of USB devices.
>
>
>    usb devfs has a disconnect ioctl (USBDEVFS_DISCONNECT) which
> allows you to disconnect a single device from a driver.
>
>    A suggestion is to hook the interface up to qemu monitor.  Then you would 
> be able to list usb devices and then claim only the ones you want to use.

Good idea. I am adding something like that:

In the monitor:

'info usbhost' lists the available host USB devices

'usbhost_add 3.4' or 'usbhost_add 1234:5678' adds the USB host device on 
bus 3 at address 4 or the first one matching the vendor ID 0x1234 and 
product ID 0x5678.

The QEMU option '-usbhost x' can be used to do the same as usbhost_add.

Fabrice.