From b9500546d5f85b56359657e1f78334db8de851fd Mon Sep 17 00:00:00 2001 From: Pratyush Anand Date: Tue, 22 Mar 2011 16:33:58 -0700 Subject: ST SPEAr: PCIE gadget suppport This is a configurable gadget. can be configured by configfs interface. Any IP available at PCIE bus can be programmed to be used by host controller.It supoorts both INTX and MSI. By default, the gadget is configured for INTX and SYSRAM1 is mapped to BAR0 with size 0x1000 Signed-off-by: Pratyush Anand Cc: Randy Dunlap Cc: Jesse Barnes Cc: Viresh Kumar Cc: Shiraz Hashim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- .../ABI/testing/configfs-spear-pcie-gadget | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/ABI/testing/configfs-spear-pcie-gadget (limited to 'Documentation/ABI/testing') diff --git a/Documentation/ABI/testing/configfs-spear-pcie-gadget b/Documentation/ABI/testing/configfs-spear-pcie-gadget new file mode 100644 index 000000000000..875988146a63 --- /dev/null +++ b/Documentation/ABI/testing/configfs-spear-pcie-gadget @@ -0,0 +1,31 @@ +What: /config/pcie-gadget +Date: Feb 2011 +KernelVersion: 2.6.37 +Contact: Pratyush Anand +Description: + + 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. -- cgit v1.2.3