# Copyright (c) 2017 Linaro Ltd.
# SPDX-License-Identifier: Apache-2.0

DT_COMPAT_PS2_GPIO := gpio-ps2

config PS2_GPIO
	bool "GPIO bit banging PS/2 support"
	default $(dt_compat_enabled,$(DT_COMPAT_PS2_GPIO))
	help
	  Enable software driven (bit banging) PS/2 support using GPIO pins

if PS2_GPIO

config PS2_GPIO_ENABLE_PS2_RESEND_CALLBACK
	bool "Notify the PS2 device driver (mouse driver) when the received data is invalid and a resend is requested from the peripheral. This can help the higher level PS2 device driver handle transmission errors with less side-effects, but it requires a forked zephyr. With the ps2-uart driver this option is not really necessary, but is very useful for the ps2-gpio driver."
	default n
	select ZMK_INPUT_MOUSE_PS2_ENABLE_PS2_RESEND_CALLBACK

# PS/2 events must be processed within 30-50us. Therefore we shift the
# BT_CTLR_LLL_PRIO from 0 to 1 and BT_CTLR_ULL_* priorities from 1 to 2.
# We then set the gpio priority to 0.
#
# The following also has to be added to the device tree to set GPIOTE to the
# highest priority:
# &gpiote {
# 	interrupts = < 0x6 0 >;
# };
#
# On top of that all other interrupts have to be set to priority 3 to prevent
# them from delaying the BT interrupts.
#
# Overrides can be generated using the following script in infused-kim's zmk
# fork:
# app/scripts/gen_interrupt_priority_overrides.py
#
# Make sure to do it on a zephyr.dts where the interrupts have not been
# adjusted yet (i.e. a config that doesn't have the the following options
# enabled).
#
# If you are building using a toolchain you can find the zephyr.dts in the
# build directory, which by default is: `app/build/zephyr/zephyr.dts`
#
# If you are building using the github actions, copy the output of the build
# step `xxxx_right - nice_nano_v2 Devicetree file` into a file and run the
# script on it.
#
# This will increase the probability that the PS/2 interrupts are triggered in
# time.

config BT_CTLR_ADVANCED_FEATURES
	default y

config BT_CTLR_LLL_PRIO
	default 1

config BT_CTLR_ULL_HIGH_PRIO
	default 2

config BT_CTLR_ULL_LOW_PRIO
	default 2

config PS2_GPIO_INTERRUPT_LOG_ENABLED
	bool "Enable extensive interrupt logging."
	default n

endif # PS2_GPIO