| Pratyush Anand | b950054 | 2011-03-22 16:33:58 -0700 | [diff] [blame] | 1 | What: /config/pcie-gadget |
| 2 | Date: Feb 2011 |
| 3 | KernelVersion: 2.6.37 |
| 4 | Contact: Pratyush Anand <pratyush.anand@st.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. |