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path: root/drivers/net/wireless/mediatek/mt76/mt792x_usb.c
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2026-06-09wifi: mt76: mt7921u: escalate broken USB transport to device resetSean Wang
Check the USB control path before running the normal WFSYS reset flow. If USB access is no longer reliable, stop the WFSYS-only reset path, mark the device as bus_hung, and queue a USB device reset instead. Reuse the existing bus_hung state to represent transport-level failure, keeping the semantics consistent with the SDIO path. Also initialize bus_hung explicitly during probe for consistency. Reported-by: Bryam Vargas <bryamestebanvargas@gmail.com> Closes: https://lore.kernel.org/r/CANAPQziOh3sB7B8G+U3AZsFfeFN1uAg4munhwA_feZi56D7W+Q@mail.gmail.com Signed-off-by: Sean Wang <sean.wang@mediatek.com> Link: https://patch.msgid.link/20260401190632.147042-2-sean.wang@kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name>
2026-06-09wifi: mt76: mt792x: add common USB transport reset helpersSean Wang
Add per-device USB reset work and a control-path access check helper for mt7921u and mt7925u. This prepares common infrastructure for transport-level recovery while keeping the reset state per-device for correct lifetime handling. No functional change intended. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Link: https://patch.msgid.link/20260401190632.147042-1-sean.wang@kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name>
2026-06-09wifi: mt76: connac: replace is_mt7925() with is_connac3()Sean Wang
Use is_connac3() instead of is_mt7925() to avoid confusion when more chips join. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Link: https://patch.msgid.link/20260425195011.790265-11-sean.wang@kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name>
2026-06-09wifi: mt76: mt792xu: drop redundant device referenceJohan Hovold
Driver core holds a reference to the USB interface and its parent USB device while the interface is bound to a driver and there is no need to take additional references unless the structures are needed after disconnect. Drop the redundant device reference to reduce cargo culting, make it easier to spot drivers where an extra reference is needed, and reduce the risk of memory leaks when drivers fail to release it. Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://patch.msgid.link/20260430083335.215239-5-johan@kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name>
2026-03-24wifi: mt76: mt792x: fix mt7925u USB WFSYS reset handlingSean Wang
mt7925u uses different reset/status registers from mt7921u. Reusing the mt7921u register set causes the WFSYS reset to fail. Add a chip-specific descriptor in mt792xu_wfsys_reset() to select the correct registers and fix mt7925u failing to initialize after a warm reboot. Fixes: d28e1a48952e ("wifi: mt76: mt792x: introduce mt792x-usb module") Cc: stable@vger.kernel.org Signed-off-by: Sean Wang <sean.wang@mediatek.com> Link: https://patch.msgid.link/20260311002825.15502-2-sean.wang@kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name>
2026-03-24wifi: mt76: mt792x: describe USB WFSYS reset with a descriptorSean Wang
Prepare mt792xu_wfsys_reset() for chips that share the same USB WFSYS reset flow but use different register definitions. This is a pure refactor of the current mt7921u path and keeps the reset sequence unchanged. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Link: https://patch.msgid.link/20260311002825.15502-1-sean.wang@kernel.org Signed-off-by: Felix Fietkau <nbd@nbd.name>
2025-11-24wifi: mt76: relicense to BSD-3-Clause-ClearFelix Fietkau
MediaTek has asked to switch from the ISC license to BSD-3-Clause-Clear, in order to improve clarity and the legal integrity of the code. The BSD-3-Clause license includes the "no endorsement" clause, which is important for protecting the reputation of the original authors and contributors by preventing unauthorized use of their names for endorsement purposes. This clause is absent in the BSD-2-Clause license, which is more permissive but lacks this specific protection. This change also cleans up the license of some Kconfig/Makefile files, which were accidentally marked as GPL. The GPL 2.0 remains in use on mt76x0, as well as two source files in mt7615 for which the license situation still needs to be clarified. Link: https://patch.msgid.link/20251008104250.46292-2-nbd@nbd.name Signed-off-by: Felix Fietkau <nbd@nbd.name>
2024-06-26wifi: mac80211: inform the low level if drv_stop() is a suspendEmmanuel Grumbach
This will allow the low level driver to take different actions for different flows. Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://patch.msgid.link/20240618192529.739036208b6e.Ie18a2fe8e02bf2717549d39420b350cfdaf3d317@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2024-02-22wifi: mt76: mt792xu: enable dmashdl supportDeren Wu
dmashdl(DMA scheduler) was disable and may cause packets corruption without propoer resource handling. Enable this to control resources between usb-bus/pse/hardware-ac-queue. Signed-off-by: Deren Wu <deren.wu@mediatek.com> Signed-off-by: Felix Fietkau <nbd@nbd.name>
2024-01-31wifi: fill in MODULE_DESCRIPTION()s for mt76 driversBreno Leitao
W=1 builds now warn if module is built without a MODULE_DESCRIPTION(). Add descriptions to the MediaTek mt76 drivers. Here is a sorted list of descriptions. It might make the reviewing process easier. MODULE_DESCRIPTION("MediaTek MT7603E and MT76x8 wireless driver"); MODULE_DESCRIPTION("MediaTek MT7615E and MT7663E wireless driver"); MODULE_DESCRIPTION("MediaTek MT7615E MMIO helpers"); MODULE_DESCRIPTION("MediaTek MT7663 SDIO/USB helpers"); MODULE_DESCRIPTION("MediaTek MT7663S (SDIO) wireless driver"); MODULE_DESCRIPTION("MediaTek MT7663U (USB) wireless driver"); MODULE_DESCRIPTION("MediaTek MT76x02 helpers"); MODULE_DESCRIPTION("MediaTek MT76x02 MCU helpers"); MODULE_DESCRIPTION("MediaTek MT76x0E (PCIe) wireless driver"); MODULE_DESCRIPTION("MediaTek MT76x0U (USB) wireless driver"); MODULE_DESCRIPTION("MediaTek MT76x2 EEPROM helpers"); MODULE_DESCRIPTION("MediaTek MT76x2E (PCIe) wireless driver"); MODULE_DESCRIPTION("MediaTek MT76x2U (USB) wireless driver"); MODULE_DESCRIPTION("MediaTek MT76x connac layer helpers"); MODULE_DESCRIPTION("MediaTek MT76x EEPROM helpers"); MODULE_DESCRIPTION("MediaTek MT76x helpers"); MODULE_DESCRIPTION("MediaTek MT76x SDIO helpers"); MODULE_DESCRIPTION("MediaTek MT76x USB helpers"); MODULE_DESCRIPTION("MediaTek MT7915E MMIO helpers"); MODULE_DESCRIPTION("MediaTek MT7921 core driver"); MODULE_DESCRIPTION("MediaTek MT7921E (PCIe) wireless driver"); MODULE_DESCRIPTION("MediaTek MT7921S (SDIO) wireless driver"); MODULE_DESCRIPTION("MediaTek MT7921U (USB) wireless driver"); MODULE_DESCRIPTION("MediaTek MT7925 core driver"); MODULE_DESCRIPTION("MediaTek MT7925E (PCIe) wireless driver"); MODULE_DESCRIPTION("MediaTek MT7925U (USB) wireless driver"); MODULE_DESCRIPTION("MediaTek MT792x core driver"); MODULE_DESCRIPTION("MediaTek MT792x USB helpers"); MODULE_DESCRIPTION("MediaTek MT7996 MMIO helpers"); Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://msgid.link/20240130104243.3025393-10-leitao@debian.org
2023-09-30wifi: mt76: mt792x: move some common usb code in mt792x moduleLorenzo Bianconi
Move the following shared usb routines in mt792x module: - mt792xu_stop - mt792x_stop Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Felix Fietkau <nbd@nbd.name>
2023-07-26wifi: mt76: mt7921: move mt7921u_disconnect mt792x-libLorenzo Bianconi
mt7921u_disconnect routine is shared between mt7921 and mt7925 so move it in mt792x-usb module. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Deren Wu <deren.wu@mediatek.com> Signed-off-by: Felix Fietkau <nbd@nbd.name>
2023-07-26wifi: mt76: mt792x: introduce mt792x-usb moduleLorenzo Bianconi
Add usb shared code between mt7921 and mt7925 chipset to mt792x-usb module. Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org> Signed-off-by: Deren Wu <deren.wu@mediatek.com> Signed-off-by: Felix Fietkau <nbd@nbd.name>