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[GH-ISSUE #26] Support RM520N-GL in RK3588 based board on PCIe #20

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opened 2026-03-13 14:07:39 +03:00 by kerem · 4 comments
kerem commented 2026-03-13 14:07:39 +03:00
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Originally created by @avi951 on GitHub (Feb 6, 2026).
Original GitHub issue: https://github.com/4IceG/RM520N-GL/issues/26

@4IceG, could you guide on supporting this module in linux based rk3588 board?

We have attached on pci, and run lspci command, its show nothing.

First, I found that it is in USB mode, and in order to run on PCIe, we need to givean AT command.
So, we did and we also tried to update firmware from your guide.

Image Image

Have I done something wrong !?

Originally created by @avi951 on GitHub (Feb 6, 2026). Original GitHub issue: https://github.com/4IceG/RM520N-GL/issues/26 @4IceG, could you guide on supporting this module in linux based rk3588 board? We have attached on pci, and run ``lspci`` command, its show nothing. First, I found that it is in USB mode, and in order to run on PCIe, we need to givean AT command. So, we did and we also tried to update firmware from your guide. <img width="311" height="89" alt="Image" src="https://github.com/user-attachments/assets/ac619cd5-d2bd-4dfc-aa71-d473689b8472" /> <img width="550" height="216" alt="Image" src="https://github.com/user-attachments/assets/7ee2d5d5-4c62-49ba-b9bf-47ceeec75a82" /> Have I done something wrong !?
kerem commented 2026-03-13 14:07:45 +03:00
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@4IceG commented on GitHub (Feb 6, 2026):

Hi,
I don't know what exact modem you have or what fw you installed / try to install, but it didn't work and the modem switched to / stayed in EDL mode.

Read first
https://github.com/iamromulan/cellular-modem-wiki/blob/main/quectel/sdxlemur/sdxlemur_enter_EDL_mode.md
install EDL drivers http://developer.quectel.com/doc/files/Qualcomm_USB_Driver_v1.0.10065.1.zip and re-upload via QFirehose fw to modem.

<!-- gh-comment-id:3858524177 --> @4IceG commented on GitHub (Feb 6, 2026): Hi, I don't know what exact modem you have or what fw you installed / try to install, but it didn't work and the modem switched to / stayed in EDL mode. Read first https://github.com/iamromulan/cellular-modem-wiki/blob/main/quectel/sdxlemur/sdxlemur_enter_EDL_mode.md install EDL drivers http://developer.quectel.com/doc/files/Qualcomm_USB_Driver_v1.0.10065.1.zip and re-upload via QFirehose fw to modem.
kerem commented 2026-03-13 14:07:50 +03:00
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@avi951 commented on GitHub (Feb 6, 2026):

Thanks, @4IceG.
Could you also guide on AT Command !?
I have run the command below to get the Module into PCIe mode instead of USB, which is the default mode.

AT+QCFG=“data_interface”,1,0
AT+QCFG=“pcie/mode”,0

And what could be the reason it does not show in lspci command?
Is there any other requirement to set to PCIe !?

<!-- gh-comment-id:3859689438 --> @avi951 commented on GitHub (Feb 6, 2026): Thanks, @4IceG. Could you also guide on AT Command !? I have run the command below to get the Module into PCIe mode instead of USB, which is the default mode. ``` AT+QCFG=“data_interface”,1,0 AT+QCFG=“pcie/mode”,0 ``` And what could be the reason it does not show in ``lspci`` command? Is there any other requirement to set to PCIe !?
kerem commented 2026-03-13 14:07:55 +03:00
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@4IceG commented on GitHub (Feb 6, 2026):

And what could be the reason it does not show in lspci command?
Is there any other requirement to set to PCIe !?

It's hard for me to say why modem wasn't visible. Does the modem slot fully support PCIe?

<!-- gh-comment-id:3862359022 --> @4IceG commented on GitHub (Feb 6, 2026): > And what could be the reason it does not show in ``lspci`` command? > Is there any other requirement to set to PCIe !? > It's hard for me to say why modem wasn't visible. Does the modem slot fully support PCIe?
kerem commented 2026-03-13 14:08:00 +03:00
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@avi951 commented on GitHub (Feb 7, 2026):

Yes, @4IceG.
Radxa Rock 5B SBC Board ( M.2 M Key Connector to B Key Convertor ), And For RM520N-GL Module two-pin
FULL_POWER_OFF and RESET connecting on the SBC's GPIO Header Pin,

<!-- gh-comment-id:3863511665 --> @avi951 commented on GitHub (Feb 7, 2026): Yes, @4IceG. Radxa Rock 5B SBC Board ( M.2 M Key Connector to B Key Convertor ), And For RM520N-GL Module two-pin FULL_POWER_OFF and RESET connecting on the SBC's GPIO Header Pin,
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