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i.MX 6Dual/6Quad Linux Reference

Manual

Document Number: IMX6QLXRM

Rev L3.0.35_4.1.0, 09/2013

Contents

Section number Title Page

Chapter 1

About this Book

1.1 Audience.......................................................................................................................................................................23

1.1.1 Conventions.....................................................................................................................................................23

1.1.2 Definitions, Acronyms, and Abbreviations......................................................................................................23

Chapter 2

Machine Specific Layer (MSL)

2.1 Introduction...................................................................................................................................................................27

2.2 Interrupts (Operation)...................................................................................................................................................28

2.2.1 Interrupt Hardware Operation..........................................................................................................................28

2.2.2 Interrupt Software Operation...........................................................................................................................28

2.2.3 Interrupt Features.............................................................................................................................................29

2.2.4 Interrupt Source Code Structure......................................................................................................................29

2.2.5 Interrupt Programming Interface.....................................................................................................................29

2.3 Timer.............................................................................................................................................................................30

2.3.1 Timer Software Operation...............................................................................................................................30

2.3.2 Timer Features.................................................................................................................................................30

2.3.3 Timer Source Code Structure...........................................................................................................................31

2.3.4 Timer Programming Interface..........................................................................................................................31

2.4 Memory Map................................................................................................................................................................31

2.4.1 Memory Map Hardware Operation..................................................................................................................31

2.4.2 Memory Map Software Operation...................................................................................................................31

2.4.3 Memory Map Features.....................................................................................................................................31

2.4.4 Memory Map Source Code Structure..............................................................................................................32

2.4.5 Memory Map Programming Interface.............................................................................................................32

2.5 IOMUX.........................................................................................................................................................................32

2.5.1 IOMUX Hardware Operation..........................................................................................................................33

2.5.2 IOMUX Software Operation............................................................................................................................33

i.MX 6Dual/6Quad Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013

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Section number Title Page

2.5.3 IOMUX Features..............................................................................................................................................34

2.5.4 IOMUX Source Code Structure.......................................................................................................................34

2.5.5 IOMUX Programming Interface......................................................................................................................34

2.5.6 IOMUX Control Through GPIO Module........................................................................................................34

2.5.6.1 GPIO Hardware Operation.................................................................................................................35

2.5.6.1.1 Muxing Control.................................................................................................................35

2.5.6.1.2 PULLUP Control..............................................................................................................35

2.5.6.2 GPIO Software Operation (general)..................................................................................................35

2.5.6.3 GPIO Implementation........................................................................................................................36

2.5.6.4 GPIO Source Code Structure.............................................................................................................36

2.5.6.5 GPIO Programming Interface............................................................................................................36

2.6 General Purpose Input/Output(GPIO)..........................................................................................................................36

2.6.1 GPIO Software Operation................................................................................................................................36

2.6.1.1 API for GPIO.....................................................................................................................................37

2.6.2 GPIO Features..................................................................................................................................................37

2.6.3 GPIO Module Source Code Structure..............................................................................................................38

2.6.4 GPIO Programming Interface 2.......................................................................................................................38

Chapter 3

Smart Direct Memory Access (SDMA) API

3.1 Overview.......................................................................................................................................................................39

3.1.1 Hardware Operation.........................................................................................................................................39

3.1.2 Software Operation..........................................................................................................................................39

3.1.3 Source Code Structure.....................................................................................................................................40

3.1.4 Menu Configuration Options...........................................................................................................................41

3.1.5 Programming Interface....................................................................................................................................41

3.1.6 Usage Example................................................................................................................................................41

i.MX 6Dual/6Quad Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013

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Section number Title Page

Chapter 4

AHB-to-APBH Bridge with DMA (APBH-Bridge-DMA)

4.1 Overview.......................................................................................................................................................................43

4.1.1 Hardware Operation.........................................................................................................................................43

4.1.2 Software Operation..........................................................................................................................................44

4.1.3 Source Code Structure.....................................................................................................................................44

4.1.4 Menu Configuration Options...........................................................................................................................45

4.1.5 Programming Interface....................................................................................................................................45

4.1.6 Usage Example................................................................................................................................................45

Chapter 5

Image Processing Unit (IPU) Drivers

5.1 Introduction...................................................................................................................................................................47

5.2 Hardware Operation......................................................................................................................................................48

5.3 Software Operation.......................................................................................................................................................49

5.3.1 Overview of IPU Frame Buffer Drivers..........................................................................................................50

5.3.1.1 IPU Frame Buffer Hardware Operation.............................................................................................51

5.3.1.2 IPU Frame Buffer Software Operation..............................................................................................51

5.3.1.3 Synchronous Frame Buffer Driver.....................................................................................................52

5.3.2 IPU Backlight Driver.......................................................................................................................................53

5.3.3 IPU Device Driver...........................................................................................................................................53

5.4 Source Code Structure .................................................................................................................................................54

5.4.1 Menu Configuration Options...........................................................................................................................55

5.5 Unit Test........................................................................................................................................................................58

5.5.1 Framebuffer Tests............................................................................................................................................59

5.5.2 Video4Linux API test......................................................................................................................................59

5.5.3 IPU Device Unit test........................................................................................................................................60

Chapter 6

MIPI DSI Driver

6.1 Introduction...................................................................................................................................................................65

6.1.1 Overview of MIPI DSI IP Driver.....................................................................................................................65

i.MX 6Dual/6Quad Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013

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