This adds support for the current generation of ASIX network adapter chips,
which are based on the AX88179A. This includes the AX88179A/B (1GBit-PHY),
AX88772D/E (100MBit) and AX88279 (2.5GBit).

The AX179A-based chips all provide both a CDC-NCM compatible USB interface,
and a proprietary vendor interface with more features. By default, the
proprietary vendor interface is not active and Linux will load the CDC-NCM
driver to support the devices. If the ax88179_178a module is configured by
the OS to have precedence over CDC-NCM, then this driver will switch the
device to use the vendor interface, and the device will be controlled by
the ax88179_178a driver when the device is probed again after an automatic
reset of the device bringing up the vendor interface.

The following hardware was tested:
Delock 66046 2.5GBit adapter (AX88279, FW: 1.2.0.0)
TP-Link UE306 1GBit adapter (AX88179B, FW: 1.3.0.0)
Renkforce RF-4708614 1GBit adapter (AX88179A, FW: 1.0.4.0)
UGREEN CR110 100MBit adapter (AX88722E, FW: 1.3.0.0)

The driver supports the following features
- EEE
- TCP segmentation offload
- VLAN filtering/tagging offload 
  (NETIF_F_HW_VLAN_CTAG_FILTER, NETIF_F_HW_VLAN_CTAG_RX/TX)
- RX/TX checksum offload
- FC/Pause configuration
- EEPROM read access

The code is based on the ASIX 4.1.0 out-of-tree driver published under
the GPL,, the aqc111 driver which provides support for the AX88279A,
and some tracing of USB-transfers of the Windows-driver.

Signed-off-by: Birger Koblitz <redacted>
---
Changes in v2:
- Correctly use net-next prefix
- Fix compilation issue in HW support patch
- Split MMD support patch into patches for EEE/new chip support
- Do not use ADVERTISE_RESV but private flag definition
- Fix pause configuration to keep track of settings when autoneg disabled
- Fix issue with unitialized variable reported by kernel test robot [off-list ref]
- Avoid white-space changes

- Link to v1: https://lore.kernel.org/r/20260701-ax88179a-v1-0-13685df67515@birger-koblitz.de (local)

---
Birger Koblitz (12):
      ax88179_178a: Fix endianness of pause watermark register
      ax88179_178a: Add HW support for AX179A-based chips
      ax88179_178a: Add MMD accessor function for AX88179A
      ax88179_178a: Add EEE HW configuration support for AX88179A
      ax88179_178a: Add support for 2500 link speed of AX88279
      ax88179_178a: EEE setup for AX88179A-based chips
      ax88179_178a: Obtain speed and duplex from Interrupt URB
      ax88179_178a: Add support for ethtool pause parameter configuration
      ax88179_178a: Add VLAN offload support for AX88179A
      ax88179_178a: Add ethtool get_drvinfo
      ax88179_178a: Add support for AX88179A/772D/279 EEPROM access
      ax88179_178a: Add AX179A/AX279 multicast configuration

 drivers/net/usb/ax88179_178a.c | 1435 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 1298 insertions(+), 137 deletions(-)
---
base-commit: 1a9edf8be190decb17227e3cba540513d93ebb85
change-id: 20260630-ax88179a-a1d89fe21730

Best regards,
-- 
Birger Koblitz [off-list ref]