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## SPDX-License-Identifier: GPL-2.0-only
# Use "select HAVE_USBDEBUG" on southbridges which have Debug Port code.
config HAVE_USBDEBUG
bool
default y if HAVE_USBDEBUG_OPTIONS
default n
# Use "select HAVE_USBDEBUG_OPTIONS" on southbridges with multiple
# EHCI controllers or multiple ports with Debug Port capability
config HAVE_USBDEBUG_OPTIONS
def_bool n
config USBDEBUG
bool "USB 2.0 EHCI debug dongle support"
default n
depends on HAVE_USBDEBUG
help
This option allows you to use a so-called USB EHCI Debug device
(such as the Ajays NET20DC, AMIDebug RX, or a system using the
Linux "EHCI Debug Device gadget" driver found in recent kernel)
to retrieve the coreboot debug messages (instead, or in addition
to, a serial port).
This feature is NOT supported on all chipsets in coreboot!
It also requires a USB2 controller which supports the EHCI
Debug Port capability.
See https://www.coreboot.org/EHCI_Debug_Port for an up-to-date list
of supported controllers.
If unsure, say N.
if USBDEBUG
config USBDEBUG_IN_PRE_RAM
bool "Enable early (pre-RAM) usbdebug"
default y
help
Configuring USB controllers in system-agent binary may cause
problems to usbdebug. Disabling this option delays usbdebug to
be setup on entry to ramstage.
If unsure, say Y.
config USBDEBUG_HCD_INDEX
int
default 0
prompt "Index for EHCI controller to use with usbdebug" if HAVE_USBDEBUG_OPTIONS
help
Some boards have multiple EHCI controllers with possibly only
one having the Debug Port capability on an external USB port.
Mapping of this index to PCI device functions is southbridge
specific and mainboard level Kconfig should already provide
a working default value here.
config USBDEBUG_DEFAULT_PORT
int
default 0
prompt "Default USB port to use as Debug Port" if HAVE_USBDEBUG_OPTIONS
help
Selects which physical USB port usbdebug dongle is connected to.
Setting of 0 means to scan possible ports starting from 1.
Intel platforms have hardwired the debug port location and this
setting makes no difference there.
Hence, if you select the correct port here, you can speed up
your boot time. Which USB port number refers to which actual
port on your mainboard (potentially also USB pin headers on
your mainboard) is highly board-specific, and you'll likely
have to find out by trial-and-error.
choice
prompt "Type of dongle"
default USBDEBUG_DONGLE_STD
config USBDEBUG_DONGLE_STD
bool "USB gadget driver or Net20DC"
help
Net20DC, BeagleBone Black, Raspberry Pi Zero W
config USBDEBUG_DONGLE_BEAGLEBONE
bool "BeagleBone (not BeagleBone Black)"
help
Use this to configure the USB hub on BeagleBone board.
Do NOT select this for the BeagleBone Black.
config USBDEBUG_DONGLE_FTDI_FT232H
bool "FTDI FT232H UART"
help
Use this with FT232H usb-to-uart. Configuration is hard-coded
to use 8n1, no flow control.
config USBDEBUG_DONGLE_WCH_CH347
bool "WCH CH347 UART"
help
Use this with CH347 usb-to-uart. Configuration is hard-coded
to use 8n1, no flow control. For compatibility across modes
0, 1, and 3, only UART 1 is supported. The UART in mode 2 is
not currently supported.
endchoice
config USBDEBUG_DONGLE_FTDI_FT232H_BAUD
int "FTDI FT232H baud rate"
default 115200
depends on USBDEBUG_DONGLE_FTDI_FT232H
help
Select baud rate for FT232H in the range 733..12,000,000. Make
sure that your receiving side supports the same setting and your
connection works with it. Multiples of 115,200 seem to be a good
choice, and EHCI debug usually can't saturate more than 576,000.
config USBDEBUG_DONGLE_WCH_CH347_BAUD
int "WCH CH347 baud rate"
default 115200
depends on USBDEBUG_DONGLE_WCH_CH347
help
Select baud rate for CH347 in the range 1200..9,000,000. Make
sure that your receiving side supports the same setting and your
connection works with it. Multiples of 115,200 seem to be a good
choice, and EHCI debug usually can't saturate more than 576,000.
config USBDEBUG_OPTIONAL_HUB_PORT
int
default 2 if USBDEBUG_DONGLE_BEAGLEBONE
default 0
endif # USBDEBUG
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