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