LTE/5G Module Series
LTE&5G Linux USB Driver User Guide
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About the Document
History
Revision
Date
Author
Description
1.0
2015-02-27
Joe WANG
Initial
1.1
2015-3-25
Carl YIN
Updated supported products
1.2
2015-3-30
Kent XU
Added Zero Packet feature in Section 3.2.2 and 3.3.2
1.3
2015-06-24
Carl YIN
1. Added GobiNet and QMI WWAN description in
Section 3.4 and 3.5
2. Added building drivers as a kernel module in Section
3.2.4/3.3.4/3.4.3/3.5.4
3. Added power management in Chapter 4
4. Added FAQ and kernel log in Chapter 6
1.4
2015-12-16
1. Deleted Auto-Connect of GobiNet and QMI WWAN
2. Updated the usage of quectel-CM
1.5
2016-05-13
Carl YIN/
Neo HOU
Updated supported modules
1.6
2016-08-23
Kent XU
Added EC20 R2.0 in supported modules
1.7
2017-05-24
Kent XU
Added EG91/EG95/EG06/EP06/EM06/BG96 in supported
modules
1.8
2017-09-01
Kent XU
Updated description of supported modules and added
AG35 in supported modules.
2.0
2019-12-11
Carl YIN
1. Added applicable modules, which can be referred in
Table 1.
2. Updated USB driver interface description in Table 2.
3. Updated description of USB serial option, GobiNet
and QMI_WWAN drivers in Chapter 3.2, 3.3 and 3.4.
4. Added related content of testing command
“AT$QCRMCALL” and protocol QMAP on GobiNet or
QMI_WWAN driver in Chapter 5.4 and 5.6 as well as
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LTE&5G Linux USB Driver User Guide
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testing MBIM driver in Chapter 5.5.
5. Added FAQs in Chapter 6.
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Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 4
Table Index ................................................................................................................................................... 6
Figure Index ................................................................................................................................................. 7
1 Introduction .......................................................................................................................................... 8
1.1. Applicable Modules ................................................................................................................... 8
2 Overview of Linux USB Driver ............................................................................................................ 9
3 System Setup ..................................................................................................................................... 11
3.1. Linux USB Driver Structure ..................................................................................................... 11
3.2. USB Serial Option Driver ......................................................................................................... 12
3.2.1. Add VID and PID ............................................................................................................ 12
3.2.2. Add the Zero Packet Mechanism ................................................................................... 13
3.2.3. Add Reset-resume Mechanism ...................................................................................... 14
3.2.4. Increase the Quantity and Capacity of the Bulk Out URBs ........................................... 15
3.2.5. Use MBIM, GobiNet or QMI_WWAN Driver .................................................................. 15
3.2.6. Modify Kernel Configuration ........................................................................................... 16
3.3. GobiNet Driver ......................................................................................................................... 17
3.3.1. Modify Source Codes of the Driver ................................................................................ 17
3.3.2. Modify Kernel Configuration ........................................................................................... 17
3.4. QMI_WWAN Driver .................................................................................................................. 18
3.4.1. Modify Source Codes of the Driver ................................................................................ 18
3.4.2. Modify Kernel Configuration ........................................................................................... 19
3.5. Configure Kernel to Support PPP ............................................................................................ 20
3.6. Install and Load Driver as a Kernel Module for PC in Linux ................................................... 21
4 Test the Module .................................................................................................................................. 23
4.1. Test AT Function ...................................................................................................................... 23
4.2. Test PPP Function ................................................................................................................... 23
4.3. Test GobiNet/QMI_WWAN Driver ............................................................................................ 26
4.4. Test "AT$QCRMCALL" on GobiNet/QMI_WWAN Driver ........................................................ 29
4.5. Test MBIM Driver ..................................................................................................................... 30
4.6. Test QMAP on GobiNet/QMI_WWAN Driver ........................................................................... 32
5 Power Management ........................................................................................................................... 33
5.1. Enable USB Auto Suspend...................................................................................................... 33
5.2. Enable USB Remote Wakeup ................................................................................................. 34
6 FAQs and Kernel Log ........................................................................................................................ 35
6.1. How to Check Whether USB Driver Exists in the Module ....................................................... 35
6.2. How to Check Whether the Module Works Well with the Corresponding USB Driver............ 35
6.3. How to Check Which USB Driver Has Been Installed ............................................................ 36
