kernel/linux.git/drivers/usb/dwc2, branch v6.19.11

usb: dwc2: fix resume failure if dr_mode is host

2026-03-04T12:21:34+00:00

[ Upstream commit a52e4f2dff413b58c7200e89bb6540bd995e1269 ] commit 13b1f8e25bfd1 ("usb: dwc2: Force mode optimizations") removed the dwc2_force_mode(hsotg, true) in dwc2_force_dr_mode() if dr_mode is host. But this brings a bug: the controller fails to resume back as host, further debugging shows that the controller is resumed as peripheral. The reason is dwc2_force_dr_mode() missed the host mode forcing, and when resuming from s2ram, GINTSTS is 0 by default, dwc2_is_device_mode in dwc2_resume() misreads this as the controller is in peripheral mode. Fix the resume failure by adding back the dwc2_force_mode(hsotg, true). Then an obvious question is: why this bug hasn't been observed and fixed for about six years? There are two resons: most dwc2 platforms set the dr_mode as otg; Some platforms don't have suspend & resume support yet. Fixes: 13b1f8e25bfd1 ("usb: dwc2: Force mode optimizations") Cc: stable Signed-off-by: Jisheng Zhang Link: https://patch.msgid.link/20260129021534.10411-1-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin

usb: dwc2: fix hang during suspend if set as peripheral

2025-11-21T14:10:38+00:00

dwc2 on most platforms needs phy controller, clock and power supply. All of them must be enabled/activated to properly operate. If dwc2 is configured as peripheral mode, then all the above three hardware resources are disabled at the end of the probe: /* Gadget code manages lowlevel hw on its own */ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) dwc2_lowlevel_hw_disable(hsotg); But the dwc2_suspend() tries to read the dwc2's reg to check whether is_device_mode or not, this would result in hang during suspend if dwc2 is configured as peripheral mode. Fix this hang by bypassing suspend/resume if lowlevel hw isn't enabled. Fixes: 09a75e857790 ("usb: dwc2: refactor common low-level hw code to platform.c") Signed-off-by: Jisheng Zhang Link: https://patch.msgid.link/20251104002503.17158-3-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman

usb: dwc2: fix hang during shutdown if set as peripheral

2025-11-21T14:10:38+00:00

dwc2 on most platforms needs phy controller, clock and power supply. All of them must be enabled/activated to properly operate. If dwc2 is configured as peripheral mode, then all the above three hardware resources are disabled at the end of the probe: /* Gadget code manages lowlevel hw on its own */ if (hsotg->dr_mode == USB_DR_MODE_PERIPHERAL) dwc2_lowlevel_hw_disable(hsotg); But dwc2_driver_shutdown() tries to disable the interrupts on HW IP level. This would result in hang during shutdown if dwc2 is configured as peripheral mode. Fix this hang by only disable and sync irq when lowlevel hw is enabled. Fixes: 4fdf228cdf69 ("usb: dwc2: Fix shutdown callback in platform") Signed-off-by: Jisheng Zhang Link: https://patch.msgid.link/20251104002503.17158-2-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman

usb: dwc2: Add support for 'maximum-speed' property

2025-09-12T12:03:10+00:00

The DWC2 IP can be properly integrated in a SoC to work at high-speed USB speed but some board issues, EMC constraints or any other reasons can lead to the need to limit this USB speed at board level. The device-tree 'maximum-speed' property already exists for this purpose but is not handled by the DWC2 driver. Fill this lack adding support for 'maximum-speed' property and so allow to limit the USB speed in device-tree (board description). Signed-off-by: Herve Codina Link: https://lore.kernel.org/r/20250910160730.585303-1-herve.codina@bootlin.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'v6.16-rc7' into usb-next

2025-07-21T08:55:57+00:00

We need the USB/Thunderbolt fixes in here for other patches to be on top of. Signed-off-by: Greg Kroah-Hartman

usb: dwc2: gadget: Fix enter to hibernation for UTMI+ PHY

2025-07-13T15:31:04+00:00

For UTMI+ PHY, according to programming guide, first should be set PMUACTV bit then STOPPCLK bit. Otherwise, when the device issues Remote Wakeup, then host notices disconnect instead. For ULPI PHY, above mentioned bits must be set in reversed order: STOPPCLK then PMUACTV. Fixes: 4483ef3c1685 ("usb: dwc2: Add hibernation updates for ULPI PHY") Cc: stable Signed-off-by: Minas Harutyunyan Link: https://lore.kernel.org/r/692110d3c3d9bb2a91cedf24528a7710adc55452.1751881374.git.Minas.Harutyunyan@synopsys.com Signed-off-by: Greg Kroah-Hartman

usb: dwc2: disable platform lowlevel hw resources during shutdown

2025-06-30T13:42:36+00:00

On some SoC platforms, in shutdown stage, most components' power is cut off, but there's still power supply to the so called always-on domain, so if the dwc2's regulator is from the always-on domain, we need to explicitly disable it to save power. Disable platform lowlevel hw resources such as phy, clock and regulators etc. in device shutdown hook to reduce non-necessary power consumption when the platform enters shutdown stage. Signed-off-by: Jisheng Zhang Acked-by: Minas Harutyunyan Link: https://lore.kernel.org/r/20250629094655.747-1-jszhang@kernel.org Signed-off-by: Greg Kroah-Hartman

usb: dwc2: follow compatible string change for Sophgo CV18XX/SG200X series SoC

2025-06-24T14:40:40+00:00

As the wildcard name is dropped and favor new compatible string which match a real SoC, and it is not used for any board at now. Rename it to sophgo,cv1800b-usb to match the binding change. Signed-off-by: Inochi Amaoto Acked-by: Minas Harutyunyan Link: https://lore.kernel.org/r/20250618031132.373216-3-inochiama@gmail.com Signed-off-by: Greg Kroah-Hartman

treewide, timers: Rename from_timer() to timer_container_of()

2025-06-08T07:07:37+00:00

Move this API to the canonical timer_*() namespace. [ tglx: Redone against pre rc1 ] Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/aB2X0jCKQO56WdMt@gmail.com

usb: dwc2: gadget: Use USB API functions rather than constants

2025-05-21T11:13:20+00:00

Use the function usb_endpoint_type() rather than constants. The Coccinelle semantic patch is as follows: @@ struct usb_endpoint_descriptor *epd; @@ - (epd->bmAttributes & \(USB_ENDPOINT_XFERTYPE_MASK\|3\)) + usb_endpoint_type(epd) Signed-off-by: Chen Ni Link: https://lore.kernel.org/r/20250519062229.724664-1-nichen@iscas.ac.cn Signed-off-by: Greg Kroah-Hartman