I've installed OpenWrt Chaos Calmer (r44972) on a Mikrotik RouterBoard RB912UAG-5HPnD and I'm facing troubles with the on-board MiniPCI Express slot: any device I connect is not detected (I've tried with "Huawei EM820W" HSPA+ module and "Huawei ME909u-512" LTE module).
I think it is just a matter of how the PCI/USB subsystems are initialized. In fact, the RB912UAG-5HPnD board has partially shared USB port and miniPCIe slot. Due to hardware restrictions it is possible to use only one at the time for 3G modem .
I don't know if relevant, but at boot I see the following messages.
root@OpenWrt:/# dmesg | grep -i pci [ 0.320000] ar724x-pci ar724x-pci: PCIe link is down [ 0.330000] registering PCI controller with io_map_base unset [ 0.330000] PCI host bridge to bus 0000:00 [ 0.340000] pci_bus 0000:00: root bus resource [mem 0x10000000-0x13ffffff] [ 0.340000] pci_bus 0000:00: root bus resource [io 0x0000] [ 0.350000] pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff] [ 0.350000] pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00 [ 0.400000] PCI: CLS 0 bytes, default 32 [ 5.450000] ehci-pci: EHCI PCI platform driver root@OpenWrt:/# dmesg | grep -i usb [ 5.340000] usbcore: registered new interface driver usbfs [ 5.350000] usbcore: registered new interface driver hub [ 5.350000] usbcore: registered new device driver usb [ 5.380000] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 5.400000] ehci-platform ehci-platform: new USB bus registered, assigned bus number 1 [ 5.430000] ehci-platform ehci-platform: USB 2.0 started, EHCI 1.00 [ 5.430000] hub 1-0:1.0: USB hub found [ 5.460000] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 5.470000] uhci_hcd: USB Universal Host Controller Interface driver
And after that:
root@OpenWrt:/# lspci root@OpenWrt:/# lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
On Mikrotik's RouterOS there is a setting in the '/system routerboard usb' menu to select the USB port type. The available properties are: USB-type-A and mini-PCIe. Once the USB port type is set to "mini-PCIe", Mikrotik's RouterOS recognizes my PCIe devices and ignores any USB device connected the USB port. On the other hand, OpenWrt only sees the USB device and does not detect any PCIe device.
Is there a way to tell OpenWrt the USB port type to use? Is it a matter of GPIO settings? Has anyone had the same problems?
Thank you and best regards,
(Last edited by giorgiobuffa.work on 14 Apr 2015, 15:42)