I'm unable to see USB devices connected to the internal USB headers on
a PC Engines APU2c2 board. The same devices work as expected when
connected to the external USB ports.
I have a TinyCore Linux USB stick handy that I used to update the
board's firmware. If I boot it and run `lsusb` then I can see my
devices using all of the internal and external USB headers/ports.
So it would seem that the internal headers are wired up and working,
but for some reason I can't use them via ehci. Note that that the
external USB ports are USB3, so devices appear via xhci. It could
therefore be a wider issue with ehci on this board.
I've included as much detail as I know how to find below. If anyone
has any ideas for things I can try to make this work I'd be very
pleased to hear them.
Sam
Host: PC Engines APU2c2 running OpenBSD 6.0, then TinyCore Linux 6.4.
Test device: FTDI Basic USB to Serial board.
- - - - OpenBSD dmesg - - - -
$ dmesg | egrep -i 'hci|hub|usb'
xhci0 at pci0 dev 16 function 0 "AMD Bolton xHCI" rev 0x11: msi
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 "AMD xHCI root hub" rev 3.00/1.00 addr 1
ahci0 at pci0 dev 17 function 0 "AMD Hudson-2 SATA" rev 0x40: apic 4 int 19,
AHCI 1.3
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
ehci0 at pci0 dev 19 function 0 "AMD Hudson-2 USB2" rev 0x39: apic 4 int 18
usb1 at ehci0: USB revision 2.0
uhub1 at usb1 "AMD EHCI root hub" rev 2.00/1.00 addr 1
uhub2 at uhub1 port 1 "Advanced Micro Devices product 0x7900" rev 2.00/0.18
addr 2
- - - - OpenBSD, FTDI on internal J11 USB header (EHCI) - - - -
$ usbdevs -vd
Controller /dev/usb0:
addr 1: super speed, self powered, config 1, xHCI root hub(0x0000),
AMD(0x1022), rev 1.00
uhub0
port 1 disabled
port 2 disabled
port 3 disabled
port 4 disabled
Controller /dev/usb1:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
AMD(0x1022), rev 1.00
uhub1
port 1 addr 2: high speed, self powered, config 1, product 0x7900(0x7900),
Advanced Micro Devices(0x0438), rev 0.18
uhub2
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 2 powered
- - - - OpenBSD, FTDI on external USB port (xHCI) - - - -
$ usbdevs -vd
Controller /dev/usb0:
addr 1: super speed, self powered, config 1, xHCI root hub(0x0000),
AMD(0x1022), rev 1.00
uhub0
port 1 disabled
port 2 disabled
port 3 addr 2: full speed, power 90 mA, config 1, FT232R USB UART(0x6001),
FTDI(0x0403), rev 6.00, iSerialNumber A8004w2k
uftdi0
port 4 disabled
Controller /dev/usb1:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
AMD(0x1022), rev 1.00
uhub1
port 1 addr 2: high speed, self powered, config 1, product 0x7900(0x7900),
Advanced Micro Devices(0x0438), rev 0.18
uhub2
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 2 powered
- - - - OpenBSD pcidumps - - - -
$ doas pcidump -v 0:16:0
0:16:0: AMD Bolton xHCI
0x0000: Vendor ID: 1022 Product ID: 7814
0x0004: Command: 0006 Status: 0010
0x0008: Class: 0c Subclass: 03 Interface: 30 Revision: 11
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size:
10
0x0010: BAR mem 64bit addr: 0x00000000feb22000/0x00002000
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 1022 Product ID: 1410
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 00 Min Gnt: 00 Max Lat: 00
0x0050: Capability 0x01: Power Management
State: D0
0x0070: Capability 0x05: Message Signaled Interrupts (MSI)
0x0090: Capability 0x11: Extended Message Signaled Interrupts (MSI-X)
0x00a0: Capability 0x10: PCI Express
$ doas pcidump -v 0:19:0
0:19:0: AMD Hudson-2 USB2
0x0000: Vendor ID: 1022 Product ID: 7808
0x0004: Command: 0006 Status: 02b0
0x0008: Class: 0c Subclass: 03 Interface: 20 Revision: 39
0x000c: BIST: 00 Header Type: 00 Latency Timer: 40 Cache Line Size:
10
0x0010: BAR mem 32bit addr: 0xfeb25400/0x00000100
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 1022 Product ID: 7808
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 00 Min Gnt: 00 Max Lat: 00
0x00c0: Capability 0x01: Power Management
State: D0
0x00e4: Capability 0x0a: Debug Port
- - - - Linux dmesg - - - -
# dmesg | egrep -i 'hci|hub|usb' | cut -c16-
pci 0000:00:11.0: set SATA to AHCI mode
ACPI: bus type USB registered
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
ahci 0000:00:11.0: version 3.0
ahci 0000:00:11.0: AHCI 0001.0300 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
ahci 0000:00:11.0: flags: 64bit ncq sntf ilck pm led clo pmp fbs pio slum part
scsi0 : ahci
scsi1 : ahci
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ehci-pci: EHCI PCI platform driver
ehci-pci 0000:00:13.0: EHCI Host Controller
ehci-pci 0000:00:13.0: new USB bus registered, assigned bus number 1
ehci-pci 0000:00:13.0: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh
workaround
ehci-pci 0000:00:13.0: debug port 2
ehci-pci 0000:00:13.0: irq 18, io mem 0xfeb25400
ehci-pci 0000:00:13.0: USB 2.0 started, EHCI 1.00
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 2 ports detected
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci-pci: OHCI PCI platform driver
uhci_hcd: USB Universal Host Controller Interface driver
usbcore: registered new interface driver uas
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver ums-alauda
usbcore: registered new interface driver ums-cypress
usbcore: registered new interface driver ums-datafab
usbcore: registered new interface driver ums_eneub6250
usbcore: registered new interface driver ums-freecom
usbcore: registered new interface driver ums-isd200
usbcore: registered new interface driver ums-jumpshot
usbcore: registered new interface driver ums-karma
usbcore: registered new interface driver ums-onetouch
usbcore: registered new interface driver ums-sddr09
usbcore: registered new interface driver ums-sddr55
usbcore: registered new interface driver ums-usbat
usbcore: registered new interface driver appletouch
usbcore: registered new interface driver bcm5974
usbcore: registered new interface driver synaptics_usb
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
usb 1-1: new high-speed USB device number 2 using ehci-pci
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 4 ports detected
xhci_hcd 0000:00:10.0: xHCI Host Controller
xhci_hcd 0000:00:10.0: new USB bus registered, assigned bus number 2
xhci_hcd 0000:00:10.0: irq 77 for MSI/MSI-X
xhci_hcd 0000:00:10.0: irq 78 for MSI/MSI-X
xhci_hcd 0000:00:10.0: irq 79 for MSI/MSI-X
xhci_hcd 0000:00:10.0: irq 80 for MSI/MSI-X
xhci_hcd 0000:00:10.0: irq 81 for MSI/MSI-X
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
xhci_hcd 0000:00:10.0: xHCI Host Controller
xhci_hcd 0000:00:10.0: new USB bus registered, assigned bus number 3
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
sdhci: Secure Digital Host Controller Interface driver
sdhci: Copyright(c) Pierre Ossman
sdhci-pci 0000:00:14.7: SDHCI controller found [1022:7813] (rev 1)
mmc0: SDHCI controller on PCI [0000:00:14.7] using ADMA
usb 2-1: new high-speed USB device number 2 using xhci_hcd
usb-storage 2-1:1.0: USB Mass Storage device detected
scsi4 : usb-storage 2-1:1.0
- - - - Linux, FTDI on internal J11 USB header (EHCI) - - - -
usb 1-1.1: new full-speed USB device number 3 using ehci-pci
# lsusb
Bus 001 Device 003: ID 0403:6001 Future Technology Devices International, Ltd
FT232 USB-Serial (UART) IC
Bus 001 Device 002: ID 0438:7900 Advanced Micro Devices, Inc.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 0781:5571 SanDisk Corp. Cruzer Fit
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
# lsusb -v -s 1:3
Bus 001 Device 003: ID 0403:6001 Future Technology Devices International, Ltd
FT232 USB-Serial (UART) IC
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 8
idVendor 0x0403 Future Technology Devices International, Ltd
idProduct 0x6001 FT232 USB-Serial (UART) IC
bcdDevice 6.00
iManufacturer 1 FTDI
iProduct 2 FT232R USB UART
iSerial 3 A8004w2k
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 90mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
bInterfaceProtocol 255 Vendor Specific Protocol
iInterface 2 FT232R USB UART
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Device Status: 0x0000
(Bus Powered)
- - - -
