Add initial HID device support. Unlike the existing HID implementation,
the new implementation uses a devicetree to instantiate a HID device.
To the user, the HID device appears as a normal Zephyr RTOS device.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
The implementation uses the system workqueue and a callback provided
and registered by the application. The application callback is called in
the context of the workqueue. Notification messages are stored in a
queue and delivered to the callback in sequence.
We cannot call application callback directly from the USB device stack
thread because the behavior of arbitrary code provided by the
application is unpredictable, and we do not want it to be executed in
the same context where all events from the device controller are
handled.
Nor can we use the ZBUS subsystem directly. ZBUS offloads responsibility
for defined behavior to the observers and application, and does not
provide any way for the publisher to enforce defined behavior and
execution context.
ZBUS listener would be called from the USB thread context and is not
acceptable. ZBUS subscriber does not provide delivery guarantee and
cached message can be overwritten. ZBUS message subscriber has
cumbersome global configuration and buffers that are too complicated to
handle from USB configuration, and even if we would use it, defined
behavior is not possible because of how listener and subscriber are
handled.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
Introduce new USB Audio 2 implementation written from scratch. Main goal
behind new implementation was to perform entity configuration with
devicetree bindings, hiding the descriptor complexity from application.
Initial implementation is working at Full-Speed only. High-Speed support
will come later, but even at Full-Speed only this is viable replacement
for old stack USB Audio 1 class (USB Audio 1 is limited to Full-Speed by
specification, i.e. it is explicitly forbidden for USB Audio 1 device to
work at High-Speed).
Implemented is only absolute minimum set of features required for basic
implicit and explicit feedback samples. Only one sample frequency is
currently supported. Optional interrupt notifications are not supported.
Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
Add CDC Ethernet Control Model class implementation for the
new experimental USB device support based on the existing
implementation subsys/usb/device/class/netusb/function_ecm.c.
The implementation forms virtual ethernet connection between
USB host and USB device and requires two corresponding MAC
addresses, one for the virtual interface on the device side,
and other for the host which is described by a string descriptor.
With upcoming changes it should also possible to use a real
ethernet controller as media access on the device side.
CDC ECM implementation supports multiple instances which are
specified using DT. The number of instances is limited by the
number of endpoints on the controller, two to three should usually
be possible.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
Introduce new USB Mass Storage Bulk-Only Transport implementation
written from scratch. Main goal behind new implementation was to
separate USB and SCSI parts as clearly as possible.
Limited set of SCSI disk commands is implemented in separate source code
file that is internal to USB device stack. While it should be possible
to use the SCSI implementation by other components there is currently no
other user besides USB MSC and therefore SCSI header is kept private.
Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
Add Bluetooth HCI USB transport layer implementation for the new
experimental USB device support based on the existing implementation
subsys/usb/device/class/bluetooth.c.
This implementation, unlike existing one, contains the interface
descriptors for isochronous endpoints. Since we do not support voice
channels, these are just there to avoid issues with Linux kernel btusb
driver when this implementation is part of a composite configuration.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
Add experimental CDC ACM implementation for new USB device stack.
It currently implements only UART IRQ API support and is WIP.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
The device supprt brings support for multiple stack instances,
multiple configuration, asynchronous transfer model, ability to
change most of the properties of a device at runtime and
the composition of configuration and classes at runtime.
The stack requires new UDC driver API and is not compatible
with old driver API (usb_dc_). The classes (functions) of old
(current) USB device stack cannot be used with new ones and must
be ported.
Signed-off-by: Johann Fischer <johann.fischer@nordicsemi.no>
