CP2102 UART adapter not attaching

[Mark Johnston]

On Wed, Jan 13, 2016 at 07:17:04AM +0100, Hans Petter Selasky wrote:
> On 01/13/16 07:04, Mark Johnston wrote:
> > On Mon, Jan 11, 2016 at 09:41:01AM +0100, Hans Petter Selasky wrote:
> >> On 01/10/16 05:07, Mark Johnston wrote:
> >>> Hi,
> >>>
> >>> I have the module listed here:
> >>> http://www.amazon.com/KEDSUM%C2%AE-CP2102-Module-Download-Converter/dp/B009T2ZR6W
> >>>
> >>> Under Windows 8 it works perfectly, but on FreeBSD-CURRENT I get:
> >>>
> >>> usb_alloc_device: set address 3 failed (USB_ERR_STALLED, ignored)
> >>> usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
> >>> usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
> >>> usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
> >>> usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
> >>> usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
> >>> usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
> >>> usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
> >>> usbd_req_re_enumerate: addr=3, set address failed! (USB_ERR_STALLED, ignored)
> >>> usbd_setup_device_desc: getting device descriptor at addr 3 failed, USB_ERR_STALLED
> >>> ugen1.3: <Unknown> at usbus1 (disconnected)
> >>> uhub_reattach_port: could not allocate new device
> >>>
> >>> It looks like this device should be handled by uslcom(4), but it looks
> >>> like we can't even get the device descriptor. How can I go about
> >>> debugging this?
> >>
> >> Hi,
> >>
> >> What does "usbconfig" say about your USB controllers?
> >>
> >> Did you try to connect through an external USB HUB?
> >
> > No, I don't have one handy. usbconfig shows:
> >
> > ugen0.1: <XHCI root HUB 0x8086> at usbus0, cfg=0 md=HOST spd=SUPER (5.0Gbps) pwr=SAVE (0mA)
> > ugen1.1: <EHCI root HUB Intel> at usbus1, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=SAVE (0mA)
> > ugen2.1: <EHCI root HUB Intel> at usbus2, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=SAVE (0mA)
> >
> 
> Could you show what "pciconf -lv" says about xhci0. Sometimes you need 
> to set a special routing register before some XHCI controllers work!

xhci0 at pci0:0:20:0:      class=0x0c0330 card=0x84ca1043 chip=0x1e318086 rev=0x04 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = '7 Series/C210 Series Chipset Family USB xHCI Host Controller'
    class      = serial bus
    subclass   = USB

I'm plugging the module into the first EHCI controller though - it's a
USB 2.0 device.

> 
> >>
> >> The log you show basically shows that the device is refusing to enumerate.
> >>
> >> You can try adding "options USB_REQ_DEBUG" to GENERIC. Then you'll have
> >> some more sysctl knobs under hw.usb which allows you to try to figure
> >> out timing related issues.
> >
> > I tried increasing several hw.usb.timings sysctl values but haven't had
> > any luck so far.
> >
> >>
> >> Which version of FreeBSD are you using?
> >
> > CURRENT at r293678 with some local modifications. No changes to the USB
> > stack though.
> >
> 
> --HPS