Documentation/ABI/testing/configfs-spear-pcie-gadget

   1 What:           /config/pcie-gadget
   2 Date:           Feb 2011
   3 KernelVersion:  2.6.37
   4 Contact:        Pratyush Anand <pratyush.anand@gmail.com>
   5 Description:
   6
   7         Interface is used to configure selected dual mode PCIe controller
   8         as device and then program its various registers to configure it
   9         as a particular device type.
  10         This interfaces can be used to show spear's PCIe device capability.
  11
  12         Nodes are only visible when configfs is mounted. To mount configfs
  13         in /config directory use:
  14         # mount -t configfs none /config/
  15
  16         For nth PCIe Device Controller
  17         /config/pcie-gadget.n/
  18                 link ... used to enable ltssm and read its status.
  19                 int_type ...used to configure and read type of supported
  20                         interrupt
  21                 no_of_msi ... used to configure number of MSI vector needed and
  22                         to read no of MSI granted.
  23                 inta ... write 1 to assert INTA and 0 to de-assert.
  24                 send_msi ... write MSI vector to be sent.
  25                 vendor_id ... used to write and read vendor id (hex)
  26                 device_id ... used to write and read device id (hex)
  27                 bar0_size ... used to write and read bar0_size
  28                 bar0_address ... used to write and read bar0 mapped area in hex.
  29                 bar0_rw_offset ... used to write and read offset of bar0 where
  30                         bar0_data will be written or read.
  31                 bar0_data ... used to write and read data at bar0_rw_offset.