This commit updates how the USBH handles device creation and enumeration so that
upper layers (such as the Hub driver) can use the USBH API for enumeration instead
of calling the HCD.
USBH Updates:
USBH now creates unenumerated devices set to address 0 with no device/config
descriptor. A newly created device can be opened and communicated with immediately
(using control transfers). This allows the Hub driver to call the USBH instead of
the HCD. Summary of USBH changes:
- Added new APIs to add/remove a device. Devices are now created as unenumerated
and can be immediately opened and communicated with.
- Added new APIs to enumerate a device (see 'usbh_dev_set_...()' functions). Device
must be locked (see 'usbh_dev_enum_lock()') before enumeration functions can be called.
- Added UID for each device. This allows the particular USBH without needing to
use the device's handle (which implies opening the device).
Hub Driver Updates:
Hub driver now calls the USBH for enumeration. Summary of USBH changes:
- Replace all 'hcd_pipe_...()' calls with 'usbh_dev_...()' calls
- Refactored port event handling to fit with new USBH API
- Updated to use UID to uniquely identify devices without opening them
USB Host Updates:
- Reroute USBH control transfers to clients and hub driver
This commit updates the HCD API to allow port resets to occur even if pipes
are allocated. The pipes cannot be active and the port reset will simply
restore the pipes (by reinitializing their channel registers) following the
reset.
Changes:
- Allow port resets while channels are allocated
- Remove pipe persistance API 'hcd_pipe_set_persist_reset()'
This commit adds a subset of the DWC OTG configuration values to the
'usb_dwc_ll.h' file. Only relevant configuration values have been added.
Some DWC OTG releated constants have also been moved from 'usb_dwc_hal.h'
to 'usb_dwc_ll.h' and renamed.
This commit refactors the USBH and the USB Host Library in the following ways:
- USBH now presents an abstraction of an endpoint (via usbh_ep_handle_t)
- Added separate functions to enqueue/dequeue URBs to a particular endpoint
- USB Host Library no longer calls HCD API directly. Calls USBH endpoint API
instead.
- Renamed "notif_cb" to "proc_req_cb" (Processing Request Callback)
- This is to avoid confusion with FreerTOS task notifications and Host
Library client event notifications.
- The processing functions of each layer (i.e., "xxx_process()") request
calls via the "proc_req_cb"
- The main handling function (i.e., usb_host_lib_handle_events()) is
responsible for calling the required "xxx_process()" of each layer
Following the file renaming to use the "usb_dwc" prefix, this commit
updates the symbol names of those files to use the "usb_dwc" as well.
Some LL functions were also renamed so that the register name is
mentioned.
This commit updates the DWC_OTG based struct/ll/hal file names to
use the prefix "usb_dwc". This naming scheme reduces ambiguity if
another USB controller implementation is added.
As a result, "hcd.c" has been renamed to "hcd_dwc.c"
