Date: Tue, 12 Mar 2019 22:43:39 +0100 From: Hans Petter Selasky <hps@selasky.org> To: Mike Tancsa <mike@sentex.net>, freebsd-usb@FreeBSD.org Subject: Re: strange USB timing issue with u3g Message-ID: <2476a53c-e223-1c81-165c-73fa884f30da@selasky.org> In-Reply-To: <3377e001-f035-acec-765c-aee7113f20d4@sentex.net> References: <3377e001-f035-acec-765c-aee7113f20d4@sentex.net>
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On 3/12/19 9:49 PM, Mike Tancsa wrote: > I have a strange issue I started to see on RELENG11 and RELENG12 that I > am not sure when it started or if its always been there. On an > PCEngines APU3, with an LTE modem that works with the u3g driver, it > will fail to attach if the box does not boot up fast enough. So I am > guessing something gets messed up in initialization and timing ? > > e.g. in loader.conf I have > > autoboot_delay=2 > dcons_load="YES" > amdsbwd_load="YES" > u3g_load="YES" > beastie_disable="YES" > comconsole_speed="115200" > console="comconsole" > #hw.usb.debug=1 > > > If I pause at the boot or make the delay say 10 seconds, the device > often errors out. The device normally looks like this > > ugen2.1: <AMD EHCI root HUB> at usbus2, cfg=0 md=HOST spd=HIGH (480Mbps) > pwr=SAVE (0mA) > ugen1.1: <AMD EHCI root HUB> at usbus1, cfg=0 md=HOST spd=HIGH (480Mbps) > pwr=SAVE (0mA) > ugen0.1: <0x1022 XHCI root HUB> at usbus0, cfg=0 md=HOST spd=SUPER > (5.0Gbps) pwr=SAVE (0mA) > ugen2.2: <vendor 0x0438 product 0x7900> at usbus2, cfg=0 md=HOST > spd=HIGH (480Mbps) pwr=SAVE (100mA) > ugen1.2: <vendor 0x0438 product 0x7900> at usbus1, cfg=0 md=HOST > spd=HIGH (480Mbps) pwr=SAVE (100mA) > ugen2.3: <HUAWEI Technology HUAWEI Mobile> at usbus2, cfg=0 md=HOST > spd=FULL (12Mbps) pwr=ON (500mA) > > ugen2.3: <HUAWEI Technology HUAWEI Mobile> at usbus2, cfg=0 md=HOST > spd=FULL (12Mbps) pwr=ON (500mA) > > bLength = 0x0012 > bDescriptorType = 0x0001 > bcdUSB = 0x0200 > bDeviceClass = 0x0000 <Probed by interface class> > bDeviceSubClass = 0x0000 > bDeviceProtocol = 0x0000 > bMaxPacketSize0 = 0x0040 > idVendor = 0x12d1 > idProduct = 0x1573 > bcdDevice = 0x0228 > iManufacturer = 0x0002 <HUAWEI Technology> > iProduct = 0x0003 <HUAWEI Mobile> > iSerialNumber = 0x0004 <0123456712ABCA17> > bNumConfigurations = 0x0003 > > > But about 50% of the time with a longer delay, at bootup time I get > > uhub4: 4 ports with 4 removable, self powered > 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 > > > vs > > ugen0.1: <0x1022 XHCI root HUB> at usbus0 > ugen1.1: <AMD EHCI root HUB> at usbus1 > ugen2.1: <AMD EHCI root HUB> at usbus2 > uhub0: <0x1022 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0 > uhub1: <AMD EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1 > uhub2: <AMD EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus2 > mmcsd0: 4GB <SDHC SD04G 3.0 SN 014883B2 MFG 02/2018 by 39 PH> at mmc0 > 50.0MHz/4bit/65535-block > Trying to mount root from ufs:/dev/mmcsd0s1a [ro]... > uhub0: 4 ports with 4 removable, self powered > uhub1: 2 ports with 2 removable, self powered > uhub2: 2 ports with 2 removable, self powered > Starting file system checks: > /dev/mmcsd0s1a: FILE SYSTEM CLEAN; SKIPPING CHECKS > /dev/mmcsd0s1a: clean, 386561 free (3113 frags, 47931 blocks, 0.1% > fragmentation) > ugen1.2: <vendor 0x0438 product 0x7900> at usbus1 > uhub3 on uhub1 > uhub3: <vendor 0x0438 product 0x7900, class 9/0, rev 2.00/0.18, addr 2> > on usbus1 > ugen2.2: <vendor 0x0438 product 0x7900> at usbus2 > uhub4 on uhub2 > uhub4: <vendor 0x0438 product 0x7900, class 9/0, rev 2.00/0.18, addr 2> > on usbus2 > /dev/mmcsd0s3: FILE SYSTEM CLEAN; SKIPPING CHECKS > /dev/mmcsd0s3: clean, 2829 free (21 frags, 351 blocks, 0.7% fragmentation) > /etc/rc: WARNING: hostid: unable to figure out a UUID from DMI data, > generating a new one > uhub3: 4 ports with 4 removable, self powered > uhub4: 4 ports with 4 removable, self powered > ugen2.3: <HUAWEI Technology HUAWEI Mobile> at usbus2 > u3g0 on uhub4 > u3g0: <HUAWEI Technology HUAWEI Mobile, class 0/0, rev 2.00/2.28, addr > 3> on usbus2 > u3g0: Found 5 ports. > > > Enabling debug will make it fail. Any idea what it might be or how I > can tweak it to it more reliably initializes ? I first start to notice > it when I added a few more klds at boot time. This made the boot up > process that much longer that I would run into this issue periodically. > Hi, Maybe the device expects some kind of BIOS to enumerate it quickly and if not, goes into sleep mode. Try setting: hw.usb.ehci.no_hs=1 In /boot/loader.conf . Does this change anything? USB devices are not allowed to return with a STALL-PID on set-address messages, so this is violation of established USB standards. Maybe you need a USB wire-analyzer to nail this issue. There are a bunch of tunables for example: hw.usb.timings Which affect how the USB device is enumerated. Is your device running the latest firmware from HUAWEI? --HPS
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