u-boot.git/drivers/usb/Kconfig, branch master

usb: musb: drop musb legacy drivers

2025-11-12T21:13:03+00:00

The last of the users of the legacy musb drivers have been
migrated so now remove the old musb stack, all users should
now be using the new musb stack if they need this functionality.

Signed-off-by: Peter Robinson 
[trini: Remove a Makefile reference that was missed in v1]
Signed-off-by: Tom Rini

usb: onboard-hub: Use devm API do automatically free the reset GPIO

2025-07-30T13:57:17+00:00

The reset GPIO is obtained during driver probing by the function
devm_gpiod_get_optional, which means the GPIO will be automatically
freed when the device is removed. Because of this, explicit call
to free the reset GPIO in hub remove function is not needed.
To support the Managed device resources, the DEVRES config must
be enabled, otherwise the devres functions fall back to non-managed
variants. Set the necessary dependency to DEVRES in Kconfig.

Reviewed-by: Quentin Schulz 
Signed-off-by: Lukasz Czechowski

blk: Make block subsystems select BLK

2025-01-21T01:26:54+00:00

The BLK symbol has a few meanings, one of which is that it controls the
driver model portion of a "block device". Rather than having this hidden
symbol be "default y if ..." it should be select'd by the various block
subsystems. Symbols such as PVBLOCK which already select'd BLK are
unchanged".

Reviewed-by: Peter Robinson 
Reviewed-by: Quentin Schulz 
Signed-off-by: Tom Rini

usb: tcpm: add core framework

2024-10-17T01:12:47+00:00

This adds TCPM framework in preparation for fusb302 support, which can
handle USB power delivery messages. This is needed to solve issues with
devices, that are running from a USB-C port supporting USB-PD, but not
having a battery.

Such a device currently boots to the kernel without interacting with
the power-supply at all. If there are no USB-PD message replies within
5 seconds, the power-supply assumes the peripheral is not capable of
USB-PD. It usually takes more than 5 seconds for the system to reach
the kernel and probe the I2C based fusb302 chip driver. Thus the
system always runs into this state. The power-supply's solution to
fix this error state is a hard reset, which involves removing the
power from VBUS. Boards without a battery (or huge capacitors) will
reset at this point resulting in a boot loop.

This imports the TCPM framework from the kernel. The porting has
originally been done by Rockchip using hardware timers and the Linux
kernel's TCPM code from some years ago.

I had a look at upgrading to the latest TCPM kernel code, but that
beast became a lot more complex due to adding more USB-C features.
I believe these features are not needed in U-Boot and with multiple
kthreads and hrtimers being involved it is non-trivial to port them.
Instead I worked on stripping down features from the Rockchip port
to an even more basic level. Also the TCPM code has been reworked
to avoid complete use of any timers (Rockchip used SoC specific
hardware timers + IRQ to implement delayed work mechanism). Instead
the delayed state changes are handled directly from the poll loop.

Note, that (in contrast to the original Rockchip port) the state
machine has the same hard reset quirk, that the kernel has - i.e.
it avoids disabling the CC pin resistors for devices that are not
self-powered. Without that quirk, the Radxa Rock 5B will not just
end up doing a machine reset when a hard reset is triggered, but will
not even recover, because the CPU will loose power and the FUSB302
will keep this state because of leak voltage arriving through the RX
serial pin (assuming a serial adapter is connected).

This also includes a 'tcpm' command, which can be used to get
information about the current state and the negotiated voltage
and current.

Co-developed-by: Wang Jie 
Signed-off-by: Wang Jie 
Tested-by: Soeren Moch 
Tested-by: Anand Moon 
Reviewed-by: Jonas Karlman 
Signed-off-by: Sebastian Reichel

usb: Drop old non-DM code

2024-09-18T19:00:59+00:00

The driver model deadline for USB was in 2019, so drop the old USB
keyboard code, to avoid needing to deal with the extra code path.

Drop the unnecessary #ifdef around USB_KBD_BOOT_REPORT_SIZE while we
are here.

Signed-off-by: Simon Glass

usb: Move SPL_USB_STORAGE Kconfig symbol to drivers/usb/

2023-05-16T23:51:39+00:00

To avoid piling up all the various Kconfig symbols in one place, i.e.
common/spl/Kconfig, move the USB Kconfig symbols into drivers/usb/ .
This commit moves SPL_USB_STORAGE and matching SYS_USB_FAT_BOOT_PARTITION .

Signed-off-by: Marek Vasut 
Reviewed-by: Tom Rini

usb: move CONFIG_USB_HUB_DEBOUNCE_TIMEOUT to USB

2023-03-10T16:31:31+00:00

This configuration setting is only relevant if the board supports USB.
It should not be in the main menu but in the USB menu.

The setting is only relevant in USB host mode.

Fixes: 5454dea3137d ("usb: hub: allow to increase HUB_DEBOUNCE_TIMEOUT")
Signed-off-by: Heinrich Schuchardt 
Reviewed-by: Marek Vasut 
Reviewed-by: Patrick Delaunay

usb: onboard-hub: add driver to manage onboard hub supplies

2023-01-12T15:19:53+00:00

The main issue the driver addresses is that a USB hub needs to be
powered before it can be discovered. This is often solved by using
"regulator-always-on".

This driver is inspired by the Linux v6.1 driver. It only enables (or
disables) the hub vdd (3v3) supply, so it can be enumerated.
Scanning of the device tree is done in a similar manner to the sandbox,
by the usb-uclass. DT part looks like:

&usbh_ehci {
	...
	#address-cells = <1>;
	#size-cells = <0>;
	hub@1 {
		compatible = "usb424,2514";
		reg = <1>;
		vdd-supply = <&v3v3>;
	};
};

When the bus gets probed, the driver is automatically probed/removed from
the bus tree, as an example on stm32:
STM32MP> usb start
starting USB...
STM32MP> dm tree
 Class     Index  Probed  Driver                Name
-----------------------------------------------------------
 usb           0  [ + ]   ehci_generic          |   |-- usb@5800d000
 usb_hub       0  [ + ]   usb_onboard_hub       |   |   `-- hub@1
 usb_hub       1  [ + ]   usb_hub               |   |       `-- usb_hub

STM32MP> usb tree
USB device tree:
  1  Hub (480 Mb/s, 0mA)
  |  u-boot EHCI Host Controller
  |
  +-2  Hub (480 Mb/s, 2mA)

Signed-off-by: Fabrice Gasnier 
Reviewed-by: Patrice Chotard 
Reviewed-by: Patrick Delaunay

usb: Update USB_STORAGE dependencies

2022-12-22T00:04:33+00:00

As it's no longer possible to have !DM_USB set, we can remove these
dependencies.

Signed-off-by: Tom Rini 
Reviewed-by: Simon Glass

usb: Kconfig: Fix typo in SPL_DM_USB text

2022-09-19T15:45:51+00:00

Change a typo in "USB host mode".

Signed-off-by: Fabio Estevam