MSI MN54G (MS-6877)

Overview
This device uses the USB bus from mini PCI-Express connector.

lsusb -v dump
Bus 002 Device 004: ID 0db0:6877 Micro Star International RT2573 Device Descriptor: bLength               18 bDescriptorType        1 bcdUSB              2.00 bDeviceClass           0 (Defined at Interface level) bDeviceSubClass        0 bDeviceProtocol        0 bMaxPacketSize0       64 idVendor          0x0db0 Micro Star International idProduct         0x6877 RT2573 bcdDevice           0.01 iManufacturer          1 Ralink iProduct               2 802.11 bg WLAN iSerial                0 bNumConfigurations     1 Configuration Descriptor: bLength                9 bDescriptorType        2 wTotalLength          32 bNumInterfaces         1 bConfigurationValue    1 iConfiguration         0 bmAttributes        0x80 (Bus Powered) MaxPower             300mA 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             0 Endpoint Descriptor: bLength                7 bDescriptorType        5 bEndpointAddress    0x81  EP 1 IN        bmAttributes            2 Transfer Type           Bulk Synch Type              None Usage Type              Data wMaxPacketSize    0x0200  1x 512 bytes bInterval              0 Endpoint Descriptor: bLength                7 bDescriptorType        5 bEndpointAddress    0x01  EP 1 OUT bmAttributes           2 Transfer Type           Bulk Synch Type              None Usage Type              Data wMaxPacketSize    0x0200  1x 512 bytes bInterval              0 Device Qualifier (for other device speed): bLength               10 bDescriptorType        6 bcdUSB              2.00 bDeviceClass           0 (Defined at Interface level) bDeviceSubClass        0 bDeviceProtocol        0 bMaxPacketSize0       64 bNumConfigurations     1 Device Status:    0x0000 (Bus Powered)

rt2x00 chipset info
rt2x00_set_chip: Info - Chipset detected - rt: 2573, rf: 0002, rev: 000a