On 01/10/2012 05:13 AM, Sarah Sharp wrote:
> USB devices with a BCD of 0x0210 or greater will have a USB 2.0
> extension BOS descriptor.
In my opinion, you should use 0x0201 rather than 0x0210 here. USB2 LPM
ECN specifies "Devices that support the BOS descriptor must have a
bcdUSB value of 0201H or larger". And USB IF CV test for Windows fetches
BOS descriptor for 0201 devices. SO I used 0x0201 for BOS descriptor
getting in hub_port_init().
Thanks,
Andiry
> They may also have a SuperSpeed Capabilities
> BOS descriptor, which indicates a USB 3.0 device has been plugged into a
> USB 2.0 only port. Make lsusb display all BOS descriptors for USB 2.1
> devices and later.
>
> Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
> ---
> lsusb.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/lsusb.c b/lsusb.c
> index 37c43f7..361d1e7 100644
> --- a/lsusb.c
> +++ b/lsusb.c
> @@ -3799,7 +3799,7 @@ static void dumpdev(libusb_device *dev)
>
> if (desc.bDeviceClass == LIBUSB_CLASS_HUB)
> do_hub(udev, desc.bDeviceProtocol, desc.bcdUSB);
> - if (desc.bcdUSB >= 0x0300) {
> + if (desc.bcdUSB >= 0x0210) {
> dump_bos_descriptor(udev);
> }
> if (desc.bcdUSB == 0x0200) {
--
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