USB isochronous traffic with Rasberry Pi [WAS: Re: USB audio device on Raspberry Pi]

[Ian Lepore]

On Fri, 2014-05-09 at 16:27 +0200, Hans Petter Selasky wrote:
> Hi,
> 
> I've tried to dig through the DWC OTG controller to make it work better 
> in host mode. Can you test the latest code after:
> 
> http://svnweb.freebsd.org/changeset/base/265777
> 
> And report any errors/regression issues when using USB devices?
> 
> --HPS

After updating to r265780 and building clean, I consitantly get this
when the rpi boots:

KDB: debugger backends: ddb
KDB: current backend: ddb
Copyright (c) 1992-2014 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
        The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 11.0-CURRENT #0 r265780M: Fri May  9 08:44:47 MDT 2014
    ilepore at revolution.hippie.lan:/local/build/staging/freebsd/rpi/obj/arm.armv6/local/build/staging/freebsd/rpi/src/sys/RPI-B-serial arm
gcc version 4.2.1 20070831 patched [FreeBSD]
CPU: ARM1176JZ-S rev 7 (ARM11J core)
 Supported features: ARM_ISA THUMB2 JAZELLE ARMv4 Security_Ext
 WB enabled LABT branch prediction enabled
  16KB/32B 4-way instruction cache
  16KB/32B 4-way write-back-locking-C data cache
real memory  = 134213632 (127 MB)
avail memory = 123858944 (118 MB)
random device not loaded; using insecure entropy
random: <Software, Yarrow> initialized
ofwbus0: <Open Firmware Device Tree>
simplebus0: <Flattened device tree simple bus> mem 0x20000000-0x20ffffff on ofwbus0
intc0: <BCM2835 Interrupt Controller> mem 0xb200-0xb3ff on simplebus0
systimer0: <BCM2835 System Timer> mem 0x3000-0x3fff irq 8,9,10,11 on simplebus0
Event timer "BCM2835 Event Timer 3" frequency 1000000 Hz quality 1000
Timecounter "BCM2835 Timecounter" frequency 1000000 Hz quality 1000
bcmwd0: <BCM2708/2835 Watchdog> mem 0x10001c-0x100027 on simplebus0
gpio0: <BCM2708/2835 GPIO controller> mem 0x200000-0x2000af irq 57,59,58,60 on simplebus0
gpio0: read-only pins: 46,47,48,49,50,51,52,53.
gpio0: reserved pins: 48,49,50,51,52,53.
gpioc0: <GPIO controller> on gpio0
gpiobus0: <OFW GPIO bus> on gpio0
gpioled0: <GPIO led> at pin(s) 16 on gpiobus0
bcm_dma0: <BCM2835 DMA Controller> mem 0x7000-0x7fff,0xe05000-0xe05fff irq 24,25,26,27,28,29,30,31,32,33,34,35,36 on simplebus0
mbox0: <BCM2835 VideoCore Mailbox> mem 0xb880-0xb8bf irq 1 on simplebus0
sdhci_bcm0: <Broadcom 2708 SDHCI controller> mem 0x300000-0x3000ff irq 70 on simplebus0
mmc0: <MMC/SD bus> on sdhci_bcm0
uart0: <PrimeCell UART (PL011)> mem 0x201000-0x201fff irq 65 on simplebus0
uart0: console (115200,n,8,1)
dwcotg0: <DWC OTG 2.0 integrated USB controller> mem 0x980000-0x99ffff irq 17 on simplebus0
usbus0 on dwcotg0
simplebus1: <Flattened device tree simple bus> on ofwbus0
simplebus1: could not get ranges
device_attach: simplebus1 attach returned 6
Timecounters tick every 10.000 msec
usbus0: 480Mbps High Speed USB v2.0
ugen0.1: <DWCOTG> at usbus0
uhub0: <DWCOTG OTG Root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus0
mmcsd0: 8GB <SDHC SA08G 0.4 SN 2630755555 MFG 10/2009 by 2 TM> at mmc0 50.0MHz/4bit/65535-block
bootpc_init: wired to interface 'ue0'
mmcsd0: Error indicated: 2 Bad CRC
uhub0: 1 port with 1 removable, self powered
ugen0.2: <vendor 0x0424> at usbus0
uhub1: <vendor 0x0424 product 0x9512, class 9/0, rev 2.00/2.00, addr 2> on usbus0
uhub1: MTT enabled
uhub1: 3 ports with 2 removable, self powered
random: unblocking device.
ugen0.3: <vendor 0x0424> at usbus0
smsc0: <vendor 0x0424 product 0xec00, rev 2.00/2.00, addr 3> on usbus0
uhub_reattach_port: device problem (USB_ERR_STALLED), disabling port 3
smsc0: chip 0xec00, rev. 0002
miibus0: <MII bus> on smsc0
ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0
ukphy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ue0: <USB Ethernet> on smsc0
ue0: Ethernet address: 1e:b3:27:cd:38:f3
smsc0: chip 0xec00, rev. 0002
ue0: link state changed to DOWN
Sending DHCP Discover packet from interface ue0 (1e:b3:27:cd:38:f3)
ue0: link state changed to UP
Received DHCP Offer packet on ue0 from 0.0.0.0 (accepted)
Sending DHCP Request packet from interface ue0 (1e:b3:27:cd:38:f3)
Received DHCP Ack packet on ue0 from 0.0.0.0 (accepted)
ue0 at 172.22.42.71 server 0.0.0.0
subnet mask 255.255.255.0 router 172.22.42.254 rootfs 172.22.42.240:/rpi 
Adjusted interface ue0
Trying to mount root from nfs:172.22.42.240:/rpi [ro,noatime]...
NFS ROOT: 172.22.42.240:/rpi
warning: no time-of-day clock registered, system time will not be set accurately
warning: no time-of-day clock registered, system time will not be set accurately
smsc0: error: usb error on tx: USB_ERR_IOERROR
smsc0: warning: bulk read error, USB_ERR_IOERROR
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
ue0: link state changed to DOWN
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
smsc0: at uhub1, port 1, addr 3 (disconnected)
smsc0: warning: Failed to read register 0x114
smsc0: warning: MII is busy
ukphy0: detached
miibus0: detached
smsc0: <vendor 0x0424 product 0xec00, rev 2.00/2.00, addr 3> on usbus0
smsc0: chip 0xec00, rev. 0002
miibus0: <MII bus> on smsc0
ukphy0: <Generic IEEE 802.3u media interface> PHY 1 on miibus0
ukphy0:  none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
ue0: <USB Ethernet> on smsc0
ue0: Ethernet address: be:a4:34:6d:c5:2a
newnfs server 172.22.42.240:/rpi: not responding
newnfs server 172.22.42.240:/rpi: not responding
newnfs server 172.22.42.240:/rpi: not responding

It's interesting that it worked well enough to mount the nfsroot
filesystem, then went bad after that.

-- Ian