Freescale Semiconductor i.MX 6DualLite, Справочное руководство

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Chapter 36
i.MX 6 PCI Express Root Complex Driver
36.1 Introduction
PCI Express hardware module, contained in i.MX 6 SoC, can either be configured to act
as a Root Complex or a PCIe Endpoint.
This chapter describes the PCI Express Root Complex implementation on i.MX 6Dual/
6Quad/6Solo/6DualLite SOC's families.
It also describes the drivers that need to be configured and operated on the i.MX 6 PCI
Express device as Root Complex.
36.1.1 PCIe
PCI Express (PCIe) is Third Generation I/O Interconnect, targeting low cost, high
volume, multi-platform interconnection usages. It has the concepts with earlier PCI and
PCI-X and offers backwards compatibility for existing PCI software with following
differences:
• PCIe is a point-to-point interconnect
• Serial link between devices
• Packet based communication
• Scalable performance via aggregated Lanes from X1 to X16
• Need PCIe switch to have connection between more than two PCIe devices
36.1.2 Terminology and Conventions
Following terminologies and conventions are used in this document:
• Bridge
i.MX 6Solo/6DualLite Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013
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