On 03/30/15 11:19, Hans Petter Selasky wrote:
On 03/30/15 10:54, Hans Petter Selasky wrote:
On 03/30/15 06:54, Kohji Okuno wrote:
Hi HPS
I have a question.
Why do we try to enter U1 mode in SuperSpeed?
This is the following codes(***)
In our proprietary environmen(This has a xHCI controller), when a
device accept U1, the device may be strange status. Acutually, when I
tried to connect "Western Digital My Passport Essential 320GB
(P/N:WDBACY3200ABK-00)", this HDD was not recognized correctly.
But, in PC environment, this HDD was recognized correctly.
Regards,
Kohji Okuno
(***)
usb_hub.c:
793 if (speed == USB_SPEED_SUPER) {
794 err = usbd_req_set_hub_u1_timeout(udev, NULL,
795 portno, 128 - (2 * udev->depth));
796 if (err) {
797 DPRINTFN(0, "port %d U1 timeout "
798 "failed, error=%s\n",
799 portno, usbd_errstr(err));
800 }
801 err = usbd_req_set_hub_u2_timeout(udev, NULL,
802 portno, 128 - (2 * udev->depth));
803 if (err) {
804 DPRINTFN(0, "port %d U2 timeout "
805 "failed, error=%s\n",
806 portno, usbd_errstr(err));
807 }
808 }
Hi,
We are not trying to enter U1 mode, we only setup the U1 and U2
timeouts. Is there a flag in the USB descriptors that say this is not
supported and that we need to set some other value? I thought all
superspeed devices had to support these features and that switching in
and out of the sleep modes was done by the XHCI hardware.
--HPS
Hi,
Looking at the USB 3.0 specification, I think there might be a typo there:
In table 10-13 - "U2 timeout value encoding", it says that 0xFE
corresponds to 65024 ms, but I think it should be 65024 _us_ !
Try programming values 0xFF for both U1 and U2. Does the device
enumerate then?
Maybe it only doesn't support sleep modes during enumeration and that
after set configuration it works?
Hi,
There is a super-speed device capability descriptor. What values does
the WD HDD say it supports? Currently FreeBSD does not use these values
and assume that all devices are working below the programmed defaults.
Hence this descriptor is part of the configuration descriptor, maybe
sleep modes are not supported until the configuration is set, or maybe
some firmware devs think so?
--HPS
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