jetpack 版本：Linux 35.6.0
您好：
我现在调试pcie转usb hub遇到了问题，pcie 使用的是C1.
查看pcie设备可以看到usb hub的信息，如下：
iking@iking:~$ lspci -vvv
0001:00:00.0 PCI bridge: NVIDIA Corporation Device 229e (rev a1) (prog-if 00 [Normal decode])
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 55
Bus: primary=00, secondary=01, subordinate=ff, sec-latency=0
I/O behind bridge: 0000f000-00000fff [disabled]
Memory behind bridge: 40000000-400fffff [size=1M]
Prefetchable memory behind bridge: 00000000fff00000-00000000000fffff [disabled]
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity- SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: <access denied>
Kernel driver in use: pcieport
0001:01:00.0 USB controller: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller (rev 03) (prog-if 30 [XHCI])
Control: I/O- Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Interrupt: pin A routed to IRQ 55
Region 0: Memory at 20a8000000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
查看usb设备却查看不到usb hub总线及hub上面接入的设备的信息。我看这个芯片使用的通用的CONFIG_USB_XHCI_HCD=y驱动。这个在内核中也默认有配置。
iking@iking:~$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/4p, 10000M
|__ Port 2: Dev 2, If 0, Class=Mass Storage, Driver=usb-storage, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=tegra-xusb/4p, 480M
能尽快给个解决办法吗？现在低功耗模式设置为OFF，如下图所示，但是usb还是未识别。
