Don't mark IN buffers as available during the last 200us of a full-speed
frame. This avoids a situation seen with the USB2.0 hub on a Raspberry
Pi 4 where a late IN token before the next full-speed SOF can cause port
babble and a corrupt ACK packet. The nature of the data corruption has a
chance to cause device lockup.
Use the next SOF to mark delayed buffers as available. This reduces
available Bulk IN bandwidth by approximately 20%, and requires that the
SOF interrupt is enabled while these transfers are ongoing.
Inherit the top-level enable from the corresponding Pico-SDK flag.
Applications that will not use the device in a situation where it could
be plugged into a Pi 4 or Pi 400 (for example, when directly connected
to a commodity hub or other host) can turn off the flag in the SDK.
v2: use a field in hw_endpoint to mark pending.
v3: Partial rewrite following review comments
- Stub functions out if the workaround is not required
- Only force-enable SOF while any vulnerable endpoints are active
- Respect dcd_sof_enable() functionality
- Get rid of all but necessary ifdef hackery
- Fix a bug where the "endpoint lock" was used with an uninitialised pointer.
The next change to the driver requires the export of these functions. Leave the
lock unimplemented for now.
Also move hw_set and hw_clear aliases into the top-level header file.
* Removed some compiler warnings, and cleaned out unnecessary warning suppression from CMake suppress_tinyusb_warnings()
* Made explicit family_configure_dual_usb_example() for DUAL mode examples as family_configure_target() may not generally be called multiple times for the same target
* Renamed library pico_pio_usb to tinyusb_picio_pio_usb to be clearer and avoid conflict if someone already has a pico_pio_usb in their project
* Added family_add_pico_pio_usb() method for adding Pico-PIO_SUB support to an existing example
* Allowed tinyusb_pico_pio_usb to be added to regular apps using the Pico SDK
- physically suppress warnings in TinyUSB headers using pragmas so they don't break -Werror compilation of external files that include them
- fix compiler warnings in rp2040 port
- add cmake method to rp2040 port to allow an external project to suppress warnings in TinyUSB itself
- make _hw_endpoint_xfer_sync and _hw_endpoint_start_next_buffer private
- drop prefix _ from _hw_endpoint_xfer_continue and
_hw_endpoint_reset_transfer
