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-What: /config/pcie-gadget
-Date: Feb 2011
-KernelVersion: 2.6.37
-Contact: Pratyush Anand <>
- Interface is used to configure selected dual mode PCIe controller
- as device and then program its various registers to configure it
- as a particular device type.
- This interfaces can be used to show spear's PCIe device capability.
- Nodes are only visible when configfs is mounted. To mount configfs
- in /config directory use:
- # mount -t configfs none /config/
- For nth PCIe Device Controller
- /config/pcie-gadget.n/
- link ... used to enable ltssm and read its status.
- int_type ...used to configure and read type of supported
- interrupt
- no_of_msi ... used to configure number of MSI vector needed and
- to read no of MSI granted.
- inta ... write 1 to assert INTA and 0 to de-assert.
- send_msi ... write MSI vector to be sent.
- vendor_id ... used to write and read vendor id (hex)
- device_id ... used to write and read device id (hex)
- bar0_size ... used to write and read bar0_size
- bar0_address ... used to write and read bar0 mapped area in hex.
- bar0_rw_offset ... used to write and read offset of bar0 where
- bar0_data will be written or read.
- bar0_data ... used to write and read data at bar0_rw_offset.