USB class: support multiple USB host controllers #100703
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Add a "struct usbh_status" that contains a bitmask of flags to keep track of the global state of the host context, like done for the device_next implementation. Signed-off-by: Josuah Demangeon <[email protected]>
Add missing copyright notice for the linker script to help with check_compliance.py. Signed-off-by: Josuah Demangeon <[email protected]>
Add a "struct usbh_class_api" for the host implementation, and move all the function poitners to it. Add more fields to "struct usbh_class_data". Signed-off-by: Josuah Demangeon <[email protected]>
Add API wrappers around the function pointers in struct usbh_class_api, while also documenting the USB host class internal API. Signed-off-by: Josuah Demangeon <[email protected]>
Add functions to probe/remove all classes as part of a new usbh_class.c and a matching usbh_class.h. These functions are called from the function usbh_init_device_intl() in usbh_core.c to initialize every class upon connection of a device. Every class driver provide filters to match the interfaces of the device. Co-authored-by: Aiden Hu <[email protected]> Signed-off-by: Josuah Demangeon <[email protected]>
Move the UVC header with all the definitions from the UVC standard to share it between USB host and device class implementation. Signed-off-by: Josuah Demangeon <[email protected]>
Add tests making sure the USB Host class APIs introduced build and run as expected. Signed-off-by: Josuah Demangeon <[email protected]>
Only bind to a controller after probing. Wait that a class is matching and assigned to a device to assign a host controller to a class. This allows a class to be used by any of the controller in place. Signed-off-by: Josuah Demangeon <[email protected]>
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Dependencies:
Do not bind an USB host controller context during init.
Instead only use the
c_data->udev = udev;assignment that happens inprobe()to give the class the USB context.This means that class can be used by a controller or another depending on which side the USB device is connected, and this shares resources between the ports.