tree 62d5378f378a81ba69955b82f4603e42ff8bb1de
parent 458751c2d5b5ebfdaa4397be44b2ac6a7fd9c8dc
author Nicholas Chin <nic.c3.14@gmail.com> 1665455943 -0600
committer Kyösti Mälkki <kyosti.malkki@gmail.com> 1668173614 +0000

drivers/usb/gadget.c: Add support for EHCI debug using the WCH CH347

The WCH CH347 presents a USB CDC serial port on interface 4 while in
operating modes 0, 1, and 3. Mode 0 also presents a UART on interface
2 but this is ignored for compatibility with the other modes. Mode 2
uses vendor defined HID usages for communication and is not currently
supported. Like the FT232H the data format is hard coded to 8n1.

Tested using a CH347 breakout board and a Dell Latitude E6400.

Change-Id: Ibd4ad17b7369948003fff7e825b46fe852bc7eb9
Signed-off-by: Nicholas Chin <nic.c3.14@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68264
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>