Infineon Linux FMAC Wi-Fi Driver (v2025_0602) Release Notes
About this document
Scope and purpose
This document provides an overview and updates for Infineon's AIROC™ Wi-Fi – Bluetooth® combo devices for the Infineon Linux FMAC Wi-Fi Driver (v2025_0602 release).
Intended audience
This document is intended for users configuring AIROC™ Wi-Fi – Bluetooth® combo devices over a Linux-based environment.
Overview
Brief summary
The Infineon Linux FMAC Wi-Fi Driver Release (v2025_0602) includes the following:
- FMAC Wi-Fi driver: ifx-backports GitHub page
- Firmware and Clm blob: ifx-Linux-firmware GitHub page
- Supplicant and hostapd: ifx-hostap GitHub page
All the above files are also available on the Infineon Developer community.
This release also includes patch updates for Wi-Fi with FMAC bring-up on EA iMX8 Nano host for kernel 6.6.23. Download the patches from the Infineon Developer community.
This document is intended to provide information of the following in the Infineon Linux FMAC Wi-Fi Driver Release (v2025_0602):
- FMAC driver changes
- Hostapd/supplicant changes
- Firmware changes for Infineon's AIROC™ Wi-Fi – Bluetooth® combo devices
- New Features
- WFA certification Support and Fixes
- Bug Fixes
- Regulatory (CLM) and NVRAM updates
Device firmware revision details
Firmware revision details
Note: Contact the local Infineon Technologies distribution channel (FAE or local sales representative) to get the latest hardware, NVRAM, and software files.
Note: Devices with firmware updated in this release are highlighted bold.
| Device | Wi-Fi firmware version | |
|---|---|---|
| CYW4373 | PCle SDIO Industrial |
13.35.205.100 13.10.246.356 |
| CYW43439 | USB SDIO |
7.95.98 |
| CYW43455 | SDIO | 7.45.286 |
| CYW43012 | SDIO | 13.10.271.339 |
| CYW43022 | SDIO | 13.34.107.148 |
| CYW55571 CYW55572 CYW55573 |
PCle SDIO |
18.53.469.31 |
| CYW54591 | PCle SDIO |
13.35.369 |
| CYW55511 CYW55512 CYW55513 |
SDIO | 28.10.522.8 |
Updates
Key FMAC Driver Updates
- Backport support from kernel version 4.14 to kernel version 6.1.110
- Fix for WPA3 CERT Test 9.2.1
- CLM blob and regulatory related fixes
- Fix for error observed when setting roam trigger threshold
- Support for SSID protection
- Fix for driver load issue with CYW5551x
- Support for ICMP Echo Request Offload Implementation
- Fix for Low WMM Tx Throughput
- Compilation error fixes
Hostapd/Supplicant Updates
- Support for SSID protection for STA and AP interfaces
- Fix for error upon adding more than 16 SSIDs
- Fix for incorrect 11ac connection status
Firmware Updates
CYW43022
New features
- Added support for SSID protection configuration in RSNXE - Fix for CVE-2023-52424
- Added ICMP ECHO Request Offload support
WFA certification
| Chipset | Quick track CID | WFA program supported |
|---|---|---|
| CYW43022 | WFA133143 | 11n, 11ac, WPA3, PMF, vulnerability and Forward Compatibililty |
WFA certification support fixes
| Test Plan | Supported Test Case | Description |
|---|---|---|
| Forward Compatibility | 5.2.3.3 | STAUT forward compatibility to an AP with various AKMs in RSN IE |
Bug fixes
- Fix for issues with entering Deep Sleep state despite configuration
- Fix for memory leak observed for frequent association-disassociation cycles
Known issues
N/A
Note: Deep Sleep state/feature is specific to CYW43022 which is an added state for improved low power performance.
CYW43012
New features
- Added support for SSID protection configuration in RSNXE - Fix for CVE-2023-52424
- Support for WPA3 GTKOE
- Added support for External SAE Auth timer for WPA3 SAE Roaming
WFA certification
| Chipset | Quick track CID | WFA program supported |
|---|---|---|
| CYW43012 | WFA127567 | 11n, 11ac, WPA3, PMF, vulnerability and Forward Compatibility |
WFA certification support fixes
| Test Plan | Supported Test Case | Description |
|---|---|---|
| Forward Compatibility | 5.2.3.3 | STAUT forward compatibility to an AP with various AKMs in RSN IE |
Bug fixes
- Fix for firmware crash in APSTA configuration
- Fix for memory leak observed for frequent association-disassociation cycles
Known issues
N/A
CYW55571/CYW55572/CYW55573
- CYW55570 – Dual band 2.4/5 Ghz 1x1
- CYW55571 – Tri band 2.4/5/6 Ghz 1x1
- CYW55572 – Dual band 2.4/5 Ghz 2x2
- CYW55573 – Tri band 2.4/5/6 Ghz 2x2
New features
- Added support for SSID protection configuration in RSNXE - Fix for CVE-2023-52424
- Added SDIO cryptography operations
- Added support for WPA3 GTKOE
- Added support for External SAE Authentication timer for WPA3-SAE Roaming case
- Added ICMP ECHO Request Offload support
WFA certification
| Chipset | Quick track CID | WFA program supported |
|---|---|---|
| CYW55572 | WFA131807 | 11ax – R2, 6E MBO, OCE, OWE WPA3 (192 bits, TLS 1.3, PSK, SCV) 11n, 11ac, PMF, P2P, and vulnerability Forward Compatibility |
| CYW55573 | N/A | 11ax – R2, 6E MBO, OCE, OWE WPA3 (192 bits, TLS 1.3, PSK, SCV) 11n, 11ac, PMF, P2P, and vulnerability Forward Compatibility |
WFA certification support fixes
| Test Plan | Supported Test Case | Description |
|---|---|---|
| FC | 5.2.3.3 | STAUT forward compatibility to an AP with various AKMs in RSN IE |
| FC | 5.2.3.6 | STAUT forward compatibility to an AP with various AKMs in RSN IE with WPA3-Enterprise |
| WPA3 | 9.2.1 | STAUT Interop with CTT AP that has H2E disabled |
| MBO | 5.2.3 | STAUT Beacon report test |
| Wi-Fi 6 | 5.83.1 | STAUT UL MU MIMO with HE Single Stream Pilot HE-LTF Mode test |
Bug fix
- Fix for iLPO issues
- Fix for range issues
- Fix for missing channel flags for 5GHz during scan
- Fix for DHCP Lease Time Renewal Offload (DLTRO) functionality
- Fix for mismatch between CLM and PHY power values for HE modulation rates
- Fix for 6GHz SoftAP creation failure
- Fix for 2.4GHz/5GHz and 6GHz chanspec confusion for shared channel numbers
- Fix for accepting WNM transition request
- Fix for SoftAP Beacon Tx Drift issue after scan
- Fix for WPA2 IE check algorithm for DPP functionality
- Fix for DLTRO memory leak observed during frequent association-disassociation cycles
CYW55511/CYW55512/CYW55513
- CYW55511 - Single band 2.4 Ghz
- CYW55512 – Dual band 2.4/5 Ghz
- CYW55513 – Tri band 2.4/5/6 Ghz
New features
- Added support for SSID protection configuration in RSNXE - Fix for CVE-2023-52424
- Added CSI support
- Added FTM (11mc) support
- Added SDIO cryptography operations
- Added ICMP ECHO Request Offload support
- Added support for Multiple BLE connection Co-existence with Wi-Fi
- Added WPA3 FT-SAE GTKOE Support
WFA certification
| Chipset | WFA program supported |
|---|---|
| CYW55513 | 11ax - R2, 6E MBO, OCE, OWE WPA3 (192 bits, TLS 1.3, PSK, SCV) 11n, 11ac, PMF, P2P, and vulnerability Forward Compatibility |
WFA certification support fixes
| Test Plan | Supported Test Case | Description |
|---|---|---|
| Forward Compatibility | 5.2.3.3 | STAUT forward compatibility to an AP with various AKMs in RSN IE |
| WPA3 | 5.2.9 | STAUT Interop with CTT AP that has H2E disabled |
| MBO | 5.2.3_6G | STAUT Beacon report test |
Bug fix
- Fix for firmware crash observed in APSTA configuration
- Fix for firmware crash observed in P2P configuration
- Fix for memory leak observed in WPA3 FT-SAE configuration
- Fix for driver crash observed on setting phy_forcecal to 1 for UNII-8 channels
- Fix for TPC error for HE Power value change in CLM blob
- Fix for RSNXE bit set in fast BSS transition IE in reassociation request
- Fix for WL tool backward compatibility
- iLPO improvements
- Fix for DLTRO memory leak observed during frequent association-disassociation cycles
- Fix for intermittent wakes observed in power-save mode
- Fix for TCP keepalive offload failures
- Fix for disconnection in 6GHz STA mode with Asus Aps
- Fix for ICMP ECHO request offload IPv6 checksum
Updates
- Fix for GTKOE offload failure
- Fixes for failures in FTM sessions
Regulatory changes
- CLM blob update
NVRAM updates
- 6G enhancements for low power mode
- desense, switch table, and WLAN Tx power NVRAM updates.
- 2G and 5G enhancements for high temperature conditions
- 6GHz eLNA related parameters added
Note: Contact the module vendor or local Infineon distribution channel (FAE or local sales representative) to get the NVRAM changes.
Known issues
- Combo COEX - notice UDP low throughput during BLE CIS and Wi-Fi co-ex scenario
- Third party COEX - low Zigbee performance noticed Wi-Fi Rx throughput scenario
Further Reading
For more details on features and integration, please refer the following documents:
- Getting started with Wi-Fi & Bluetooth® combo chip on iMX8 Nano Developer's Kit V3 in Linux
This guide provides step-by-step instructions to configure the AIROC™ CYW5557x Wi-Fi & Bluetooth® combo chip on the host, to load the FMAC driver, and to establish a Wi-Fi connection between an AP/SoftAP and STA. - Wireless Connectivity Technical Brief for Linux Ecosystem
Infineon's Wi-Fi & Bluetooth® or Bluetooth® Low Energy connectivity solutions are integrated into the Linux open-source ecosystem. The supported hardware and software are described in this document, including their features, modes, and limitations.
Glossary
| Abbreviation | Extended Form |
|---|---|
| AKM | Authentication Key Management |
| APSTA | Access Point and Station |
| BSS | Basic Service Set |
| CLM | Country Locale Matrix |
| CSI | Channel State Information |
| DLTRO | DHCP Lease Time Request Offload |
| DTIM | Delivery Traffic Indication Message |
| EA | Embedded Artists |
| FTM | Fine Timing Measurement (802.11mc) |
| GTKOE | Group Temporal Key Offload |
| H2E | Hash-to-Element |
| ICMP | Internal Control Message Protocol |
| ILPO | Internal Low Power Oscillator |
| MBO | Multi-band Operation |
| P2P | Peer-to-Peer |
| PMF | Protected Management Frame |
| RPI | Raspberry Pi |
| RSNXE | Robust Security Network X Element |
| SAE | Simultaneous Authentication of Equals |
| SSID | Service Set Identifier |
| STAUT | Station Under Test |
| WFA | Wi-Fi Alliance |
| WMM | Wireless Multimedia |
| WNM | Wireless Network Management (802.11v) |
Trademarks
All referenced product or service names and trademarks are the property of their respective owners.
The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc., and any use of such marks by Infineon is under license.
Important notice
The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics ("Beschaffenheitsgarantie").
With respect to any examples, hints or any typical values stated herein and/or any information regarding the application of the product, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation warranties of non-infringement of intellectual property rights of any third party.
In addition, any information given in this document is subject to customer's compliance with its obligations stated in this document and any applicable legal requirements, norms and standards concerning customer's products and any use of the product of Infineon Technologies in customer's applications.
The data contained in this document is exclusively intended for technically trained staff. It is the responsibility of customer's technical departments to evaluate the suitability of the product for the intended application and the completeness of the product information given in this document with respect to such application.
Warnings
Due to technical requirements products may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies office.
Except as otherwise explicitly approved by Infineon Technologies in a written document signed by authorized representatives of Infineon Technologies, Infineon Technologies' products may not be used in any applications where a failure of the product or any consequences of the use thereof can reasonably be expected to result in personal injury.
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