Ordering by element size prevents alignment holes, and as a consequence the
host mode version of the struct is the same size as device, as pad bytes at
the end are used instead.
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.
Fix handling of interrupt endpoints. i.e. no ZLPs.
Fix the assignation of endpoint types.
Add button support for MM900evx boards.
On board support do not block for UART input.
Correct USB FIFO use for setup data phases (OUT transfers). We cannot stop traffic on the control endpoint so we set a flag and pull data from host when tinyUSB requests it from the USB FIFO. Extend this for all endpoints although currently not required.
Rename all instances of ft90x which can apply to ft93x as ft9xx.
Add support for the cdc_dual_ports example for ft9xx.
Add LED pin definition for board LED in a simple to access place on the Bridgetek MM900EVx boards.
The SetLineCoding would fail as host would send the SETUP OUT phase before tinyUSB had setup a transaction for it. ft9xx port would ignore the transfer since there was no valid transaction setup for it. One SETUP data phase packet is cached now.
