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i.MX 6 BSP Porting Guide

Document Number: IMX6BSPPG

Rev L3.10.17_1.0.0-ga, 05/2014

Contents

Section number Title Page

Chapter 1

Porting U-Boot from an i.MX 6 Reference Board to an i.MX 6 Custom Board

1.1 U-Boot Overview............................................................................................................................................................7

1.2 Obtaining the Source Code for the U-Boot.....................................................................................................................7

1.2.1 Preparing the Code...............................................................................................................................................8

1.3 Customizing the i.MX 6 Custom Board Code................................................................................................................10

1.3.1 Changing the DCD Table for i.MX 6 DDR3LPDDR2 Initialization..................................................................10

1.3.2 Booting with the Modified U-Boot .....................................................................................................................10

1.3.3 Adding New Driver Initialization Code to Board Files.......................................................................................11

1.3.4 Further Customization at System Boot................................................................................................................12

1.3.5 Customizing the Printed Board Name.................................................................................................................12

1.4 Debugging.......................................................................................................................................................................13

1.4.1 Using RealView ICE for Debugging...................................................................................................................13

1.4.2 Using printf for debugging...................................................................................................................................13

Chapter 2

Configuring the IOMUX Controller

2.1 IOMUX Overview..........................................................................................................................................................15

2.2 Information for Setting IOMUX Controller Registers....................................................................................................16

2.3 Using IOMUX in the Device Tree - Example................................................................................................................17

Chapter 3

Registering a New UART Driver

3.1 Enabling UART on Kernel Menuconfig.........................................................................................................................19

3.2 UART Settings................................................................................................................................................................19

3.3 File Names and Locations...............................................................................................................................................19

Chapter 4

Adding Support for SDHC

4.1 SDHC Overview.............................................................................................................................................................21

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Section number Title Page

Chapter 5

Configuring the SPI NOR Flash Memory Technology Device (MTD) Driver

5.1 SPI NOR Overview.........................................................................................................................................................23

5.2 Source Code Structure....................................................................................................................................................23

5.2.1 Configuration Options..........................................................................................................................................23

5.2.2 Selecting SPI NOR on the Linux Image..............................................................................................................24

5.3 Changing the SPI Interface Configuration......................................................................................................................24

5.4 Hardware Operation........................................................................................................................................................24

5.4.1 Software Operation..............................................................................................................................................25

Chapter 6

Connecting an LVDS Panel to an i.MX 6Dual/6Quad/6Solo/6DualLite Reference Board

6.1 LVDS Overview.............................................................................................................................................................27

6.1.1 Connecting an LVDS Panel to the i.MX 6Dual/6Quad/6DualLite Reference Board..........................................27

6.2 Enabling an LVDS Channel............................................................................................................................................28

6.2.1 Locating Menu Configuration Options ...............................................................................................................28

6.3 LDB Ports.......................................................................................................................................................................28

6.3.1 Input Parallel Display Ports.................................................................................................................................29

6.3.2 Output LVDS Ports..............................................................................................................................................30

6.4 Additional Information...................................................................................................................................................30

Chapter 7

Supporting the i.MX 6Dual/6Quad/6Solo/6DualLite Camera Sensor with CSI

7.1 CSI Overview..................................................................................................................................................................31

7.1.1 Required Software ...............................................................................................................................................31

7.1.2 i.MX 6Dual/6Quad/6Solo/6DualLite CSI Interfaces Layout..............................................................................32

7.1.3 Configuring the CSI Unit in Test Mode...............................................................................................................32

7.2 Adding Support for a New CMOS Camera Sensor........................................................................................................33

7.2.1 Adding a Camera Sensor Entry in Kconfig.........................................................................................................33

7.2.2 Creating the Camera Sensor File.........................................................................................................................34

7.2.3 Adding a Compilation Flag for the New Camera................................................................................................36

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Section number Title Page

7.3 Using the I2C Interface...................................................................................................................................................37

7.3.1 Loading and Testing the Camera Module............................................................................................................39

7.4 Additional Reference Information..................................................................................................................................39

7.4.1 CMOS Interfaces Supported by the i.MX 6Dual/6Quad/6Solo/6DualLite.........................................................39

7.4.2 i.MX 6Dual/6Quad/6Solo/6DualLite CSI Parallel Interface...............................................................................41

7.4.3 Timing Data Mode Protocols...............................................................................................................................43

Chapter 8

Porting Audio Codecs to a Custom Board

8.1 Audio Overview..............................................................................................................................................................45

8.1.1 Common Porting Task.........................................................................................................................................45

8.1.2 Porting the Reference BSP to a Custom Board (audio codec is the same as in the reference design)................46

8.1.3 Porting the Reference BSP to a Custom Board (audio codec is different than the reference design).................47

Chapter 9

Porting the Ethernet Controller Driver

9.1 Ethernet Controller Overview.........................................................................................................................................49

9.1.1 Pin Configuration.................................................................................................................................................49

9.1.2 Source Code.........................................................................................................................................................50

9.1.3 Ethernet Configuration.........................................................................................................................................51

Chapter 10

Porting USB Host1 and USB OTG

10.1 USB Overview for i.MX 6Dual/6Quad/6Solo/6DualLite..............................................................................................53

10.2 USB Overview for i.MX 6SoloLite................................................................................................................................55

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