usb: device_next: Add Kconfig to set maximum speed

Two main ideas behind setting maximum speed are:
  * Allow code and RAM optimizations at compile time
  * Allow High-Speed capable drivers to limit operating speed to user
    choice.

This commit only introduces the necessary Kconfig options but does not
implement any code or RAM optimizations and does not modify any driver.

Signed-off-by: Tomasz Moń <[email protected]>

Author: tmon-nordic

drivers/usb/udc/Kconfig

@@ -11,6 +11,12 @@ menuconfig UDC_DRIVER
 
 if UDC_DRIVER
 
+config UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
+	bool
+
+config UDC_DRIVER_HIGH_SPEED_SUPPORT_ENABLED
+	bool
+
 config UDC_BUF_COUNT
 	int "Number of buffers in the pool"
 	range 16 256

drivers/usb/udc/Kconfig.dwc2

@@ -5,6 +5,7 @@ config UDC_DWC2
 	bool "DWC2 USB device controller driver"
 	default y
 	depends on DT_HAS_SNPS_DWC2_ENABLED
+	select UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
 	select NRFS if NRFS_HAS_VBUS_DETECTOR_SERVICE
 	select NRFS_VBUS_DETECTOR_SERVICE_ENABLED if NRFS_HAS_VBUS_DETECTOR_SERVICE
 	select EVENTS

drivers/usb/udc/Kconfig.mcux

@@ -5,6 +5,7 @@ config UDC_NXP_EHCI
 	bool "NXP MCUX USB EHCI Device controller driver"
 	default y
 	depends on DT_HAS_NXP_EHCI_ENABLED
+	select UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
 	select PINCTRL
 	select NOCACHE_MEMORY if CPU_HAS_DCACHE
 	imply UDC_BUF_FORCE_NOCACHE
@@ -16,6 +17,7 @@ config UDC_NXP_IP3511
 	bool "NXP MCUX USB IP3511 Device controller driver"
 	default y
 	depends on DT_HAS_NXP_LPCIP3511_ENABLED
+	select UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
 	select PINCTRL
 	imply UDC_WORKQUEUE
 	help

drivers/usb/udc/Kconfig.skeleton

@@ -5,6 +5,7 @@ config UDC_SKELETON
 	bool "Skeleton for an USB device controller driver"
 	default y
 	depends on DT_HAS_ZEPHYR_UDC_SKELETON_ENABLED
+	select UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
 	help
 	  Skeleton for an USB device controller driver.
 

drivers/usb/udc/Kconfig.virtual

@@ -6,6 +6,7 @@ config UDC_VIRTUAL
 	select UVB
 	default y
 	depends on DT_HAS_ZEPHYR_UDC_VIRTUAL_ENABLED
+	select UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
 	help
 	  Virtual USB device controller driver.
 

subsys/usb/device_next/Kconfig

@@ -16,6 +16,26 @@ module = USBD
 module-str = usbd
 source "subsys/logging/Kconfig.template.log_config"
 
+choice USBD_MAX_SPEED_CHOICE
+	prompt "Max supported connection speed"
+	default USBD_MAX_SPEED_HIGH if UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
+	default USBD_MAX_SPEED_FULL
+
+config USBD_MAX_SPEED_HIGH
+	bool "High-Speed"
+	depends on UDC_DRIVER_HAS_HIGH_SPEED_SUPPORT
+	select UDC_DRIVER_HIGH_SPEED_SUPPORT_ENABLED
+
+config USBD_MAX_SPEED_FULL
+	bool "Full-Speed"
+
+endchoice
+
+config USBD_MAX_SPEED
+	int
+	default 0 if USBD_MAX_SPEED_FULL
+	default 1 if USBD_MAX_SPEED_HIGH
+
 config USBD_SHELL
 	bool "USB device shell"
 	depends on SHELL