I have an Atmel device running yocto's dizzy release (kernel 3.6.9). I'm trying to configure the system to load a usb wifi adapter,but I'm either missing part of the drivers, or I don't have everything configured correctly. Either way, I'm not 100% sure on all of the subsystems that need to be set up to hotplug and configure wifi adapters. Here's what I know:
The manufacturer is some generic device called Panda Wireless. It actually uses the rt2800usb.ko driver under the hood. If I plug the device into my Fedora desktop, or a raspberry pi, everything loads correctly.
Nov 03 11:31:08 darkstar kernel: usb 1-2: new high-speed USB device number 4 using xhci_hcd
Nov 03 11:31:09 darkstar kernel: usb 1-2: New USB device found, idVendor=148f, idProduct=5372
Nov 03 11:31:09 darkstar kernel: usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov 03 11:31:09 darkstar kernel: usb 1-2: Product: 802.11 n WLAN
Nov 03 11:31:09 darkstar kernel: usb 1-2: Manufacturer: Ralink
Nov 03 11:31:09 darkstar kernel: usb 1-2: reset high-speed USB device number 4 using xhci_hcd
Nov 03 11:31:09 darkstar kernel: ieee80211 phy2: rt2x00_set_rt: Info - RT chipset 5392, rev 0223 detected
Nov 03 11:31:09 darkstar kernel: ieee80211 phy2: rt2x00_set_rf: Info - RF chipset 5372 detected
Nov 03 11:31:09 darkstar kernel: ieee80211 phy2: Selected rate control algorithm 'minstrel_ht'
Nov 03 11:31:09 darkstar mtp-probe[19863]: checking bus 1, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2"
Nov 03 11:31:09 darkstar mtp-probe[19863]: bus: 1, device: 4 was not an MTP device
Nov 03 11:31:10 darkstar kernel: rt2800usb 1-2:1.0 wlp0s20u2: renamed from wlan0
Nov 03 11:31:10 darkstar crda[19893]: setting regulatory domain to US based on timezone (America/New_York)
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): using nl80211 for WiFi device control
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): driver supports Access Point (AP) mode
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): new 802.11 WiFi device (driver: 'rt2800usb' ifindex: 8)
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): exported as /org/freedesktop/NetworkManager/Devices/7
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
Nov 03 11:31:10 darkstar kernel: ieee80211 phy2: rt2x00lib_request_firmware: Info - Loading firmware file 'rt2870.bin'
Nov 03 11:31:10 darkstar kernel: ieee80211 phy2: rt2x00lib_request_firmware: Info - Firmware detected - version: 0.29
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): preparing device
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> rfkill2: found WiFi radio killswitch (at /sys/devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.0/ieee80211/phy2/rfkill2) (driver rt2800usb)
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2) supports 4 scan SSIDs
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): supplicant interface state: starting -> ready
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2): supplicant interface state: ready -> disconnected
Nov 03 11:31:10 darkstar NetworkManager[911]: <info> (wlp0s20u2) supports 4 scan SSIDs
Nov 03 11:31:11 darkstar NetworkManager[911]: <info> (wlp0s20u2): supplicant interface state: disconnected -> inactive
Nov 03 11:31:13 darkstar ModemManager[755]: <warn> Couldn't find support for device at '/sys/devices/pci0000:00/0000:00:14.0/usb1/1-2': not supported by any plugin
When I plug the device into the yocto appliance, I don't get nearly as far:
Nov 3 20:03:05 yocto user.info kernel: usb 1-1: new high-speed USB device number 3 using atmel-ehci
Nov 3 20:03:05 yocto user.info kernel: usb 1-1: New USB device found, idVendor=148f, idProduct=5372
Nov 3 20:03:05 yocto user.info kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov 3 20:03:05 yocto user.info kernel: usb 1-1: Product: 802.11 n WLAN
Nov 3 20:03:05 yocto user.info kernel: usb 1-1: Manufacturer: Ralink
On the yocto appliance, the modules don't load automatically. I have to install them with modprobe. However, even after loading them manually, I don't get any further. I don't know why udev isn't picking this up, and I don't really know what else needs to happen to get wlan0 (or something like that) to show up in the adapter list.
I suppose I've been spoiled by modern Linux distros where I just plug things in and they all work :) Any advice would be greatly appreciated.
udev-monitorto get a feeling for what udev is actually doing? - Anders