1 What: /config/pcie-gadget 1 What: /config/pcie-gadget
2 Date: Feb 2011 2 Date: Feb 2011
3 KernelVersion: 2.6.37 3 KernelVersion: 2.6.37
4 Contact: Pratyush Anand <pratyush.anand@ 4 Contact: Pratyush Anand <pratyush.anand@gmail.com>
5 Description: 5 Description:
6 6
7 Interface is used to configure selecte 7 Interface is used to configure selected dual mode PCIe controller
8 as device and then program its various 8 as device and then program its various registers to configure it
9 as a particular device type. 9 as a particular device type.
10 This interfaces can be used to show sp 10 This interfaces can be used to show spear's PCIe device capability.
11 11
12 Nodes are only visible when configfs i 12 Nodes are only visible when configfs is mounted. To mount configfs
13 in /config directory use:: !! 13 in /config directory use:
>> 14 # mount -t configfs none /config/
14 15
15 # mount -t configfs none /config/ !! 16 For nth PCIe Device Controller
16 !! 17 /config/pcie-gadget.n/
17 For nth PCIe Device Controller /config !! 18 link ... used to enable ltssm and read its status.
18 !! 19 int_type ...used to configure and read type of supported
19 =============== ====================== !! 20 interrupt
20 link used to enable ltssm a !! 21 no_of_msi ... used to configure number of MSI vector needed and
21 int_type used to configure and <<
22 no_of_msi used to configure numb <<
23 to read no of MSI gran 22 to read no of MSI granted.
24 inta write 1 to assert INTA !! 23 inta ... write 1 to assert INTA and 0 to de-assert.
25 send_msi write MSI vector to be !! 24 send_msi ... write MSI vector to be sent.
26 vendor_id used to write and read !! 25 vendor_id ... used to write and read vendor id (hex)
27 device_id used to write and read !! 26 device_id ... used to write and read device id (hex)
28 bar0_size used to write and read !! 27 bar0_size ... used to write and read bar0_size
29 bar0_address used to write and read !! 28 bar0_address ... used to write and read bar0 mapped area in hex.
30 bar0_rw_offset used to write and read !! 29 bar0_rw_offset ... used to write and read offset of bar0 where
31 will be written or rea !! 30 bar0_data will be written or read.
32 bar0_data used to write and read !! 31 bar0_data ... used to write and read data at bar0_rw_offset.
33 =============== ====================== <<
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