Date: Tue, 27 Nov 2018 13:30:36 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Tom Jones <thj@freebsd.org>, freebsd-usb@freebsd.org Subject: Re: Missing USB on Intel Cherryview Message-ID: <ac5631df-04cc-1b53-0257-f24461f015b1@selasky.org> In-Reply-To: <20181127115327.GA84974@tom-desk.erg.abdn.ac.uk> References: <20181127115327.GA84974@tom-desk.erg.abdn.ac.uk>
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On 11/27/18 12:53 PM, Tom Jones wrote: > Hi, > > I have a Intel Cherryview based laptop with Braswell XHCI. The laptop has two > usb ports, a USB-A port routed to USB3 (this works) and a USB-C port routed a > USB 2 bus. > > The USB bus routed to the USB-C port does not appear under FreeBSD. > > xhci0: <Intel Braswell USB 3.0 controller> mem 0xa1a00000-0xa1a0ffff at device 20.0 on pci0 > xhci0: 32 bytes context size, 64-bit DMA > usbus0 on xhci0 > usbus0: 5.0Gbps Super Speed USB v3.0 > > There is full (if slightly old) dmesg here: https://dmesgd.nycbug.org/index.cgi?do=view&id=3213 > > It is picket up on Linux: > > [ 19.200330] uhci_hcd: USB Universal Host Controller Interface driver > [ 19.200827] xhci_hcd 0000:00:14.0: xHCI Host Controller > [ 19.200855] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 1 > [ 19.202004] xhci_hcd 0000:00:14.0: hcc params 0x200077c1 hci version 0x100 quirks 0x0000000081509810 > [ 19.202019] xhci_hcd 0000:00:14.0: cache line size of 64 is not supported > [ 19.202522] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 4.18 > [ 19.202526] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 > [ 19.202529] usb usb1: Product: xHCI Host Controller > [ 19.202534] usb usb1: Manufacturer: Linux 4.18.0-10-generic xhci-hcd > [ 19.202537] usb usb1: SerialNumber: 0000:00:14.0 > [ 19.203545] hub 1-0:1.0: USB hub found > [ 19.203579] hub 1-0:1.0: 7 ports detected > [ 19.205628] xhci_hcd 0000:00:14.0: xHCI Host Controller > [ 19.205638] xhci_hcd 0000:00:14.0: new USB bus registered, assigned bus number 2 > [ 19.205649] xhci_hcd 0000:00:14.0: Host supports USB 3.0 SuperSpeed > [ 19.205764] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 4.18 > [ 19.205768] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 > [ 19.205771] usb usb2: Product: xHCI Host Controller > [ 19.205774] usb usb2: Manufacturer: Linux 4.18.0-10-generic xhci-hcd > [ 19.205777] usb usb2: SerialNumber: 0000:00:14.0 > [ 19.206868] hub 2-0:1.0: USB hub found > [ 19.206907] hub 2-0:1.0: 6 ports detected > > It is also picked up on NetBSD, but conversations with stejda@ raise some > doubts about support there. > > xhci0 at pci0 dev 20 function 0: vendor 8086 product 22b5 (rev. 0x34) > xhci0: interrupting at msi0 vec 0 > xhci0: xHCI version 1.0 > usb0 at xhci0: USB revision 3.0 > usb1 at xhci0: USB revision 2.0 > > I have done some digging, but don't the background with usb to really know > where to look. Could someone give me some pointers for what to try? > > - Tom > Hi, Currently there is not so much to try, but you can start poking in sys/dev/usb/controller/xhci*.[ch] . I have not made any USB-C specific changes to the XHCI driver in FreeBSD, so yes, it might not work. There are also some debug knobs: sysctl -a | grep xhci --HPS
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