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# Copyright 2021 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
menuconfig PLATFORM_EC_KEYBOARD
bool "Keyboard support"
select HAS_TASK_KEYSCAN
default n if ARCH_POSIX
default y
help
Enable compilation of support for scanning a keyboard and providing
the resulting input to the AP over the host interface. This consists
of a keyboard-scanning task which provides key scans via it calling
keyboard_state_changed() (for i8042) or its client calling
keyboard_scan_get_state() (for MKBP).
Enabling this automatically enables HAS_TASK_KEYSCAN since keyboard
scanning must run in its own task.
if PLATFORM_EC_KEYBOARD
choice "Protocol select"
prompt "Select the keyboard protocol to use"
help
Select the keyboard protocol used to communicate key presses to the
AP. PLATFORM_EC_KEYBOARD_PROTOCOL_8042 is supported by x86-compatible
application processors, and PLATFORM_EC_KEYBOARD_PROTOCOL_MKBP is
used for ARM application processors.
config PLATFORM_EC_KEYBOARD_PROTOCOL_8042
bool "i8042"
select HAS_TASK_KEYPROTO
help
Use the i8042 protocol to communicate with the AP. This dates from the
Intel 8042 keyboard controller chip released in 1976. It uses two-way
communication via a few 8-bit registers, allowing key codes to be
sent to the AP when keys are pressed and released.
See here for docs: https://wiki.osdev.org/%228042%22_PS/2_Controller
endchoice # PLATFORM_EC_KEYBOARD
config PLATFORM_EC_KEYBOARD_BOARD_CONFIG
bool "Use custom keyboard config"
help
Enable support for custom keyboard config. in which case
keyscan_config must be defined by the board, using
struct keyboard_scan_config.
If this is not enabled, default values in common/keyboard_scan.c are
used.
config PLATFORM_EC_KEYBOARD_KEYPAD
bool "Support a numeric keypad"
help
Enable support for a keypad, a palm-sized keyboard section usually
placed on the far right. This contains nuumber keys and also some
commonly used symbols, to help speed up numeric data entry.
config PLATFORM_EC_KEYBOARD_COL2_INVERTED
bool "A mechanism for passing KSO2 to H1 which inverts the signal"
help
This option enables a mechanism for passing the column 2
to H1 which inverts the signal. The signal passing through H1
adds more delay. Need a larger delay value. Otherwise, pressing
Refresh key will also trigger T key, which is in the next scanning
column line. See http://b/156007029.
config PLATFORM_EC_CONSOLE_CMD_KEYBOARD_8042
bool "Console command: i8042"
default y if PLATFORM_EC_KEYBOARD_PROTOCOL_8042
help
This command prints the state of the i8042 keyboard protocol and
includes the following subcommands:
codeset - Get/set keyboard codeset
ctrlram - Get/set keyboard controller RAM
internal - Show internal information
kbd - Print or toggle keyboard info
kblog - Print or toggle keyboard event log (current disabled)
typematic - Get/set typematic delays
choice
prompt "Keyboard backlight"
optional
help
Enable support for EC control of a keyboard backlight. This enables
the "kblight" console command for manual control of the keyboard
backlight. This also enables the EC_CMD_PWM_SET_KEYBOARD_BACKLIGHT and
EC_CMD_PWM_GET_KEYBOARD_BACKLIGHT host commands for automatic control
by the AP.
TODO: support CONFIG_IO_EXPANDER_IT8801 driver which provides
PWM keyboard support.
config PLATFORM_EC_PWM_KBLIGHT
bool "PWM keyboard backlight"
depends on PLATFORM_EC_PWM
help
Enables a PWM-controlled keyboard backlight controlled by a PWM signal
connected directly to the EC chipset. The board files must define
the C reference PWM_CH_KBLIGHT to the PWM channel used for the
keyboard backlight control.
endchoice # Keyboard backlight
endif # PLATFORM_EC_KEYBOARD
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