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10ac310605
These were previously duplicated between multiple keyboard_scan.c and board.c files, and there were a bunch of different constants #defined to be 13. BUG=chrome-os-partner:18360 BRANCH=none TEST=compile all boards; test keyboard on spring and link Change-Id: I91bf9d56d2a56ff25ff307ff10883ca87b6937e5 Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/46165
75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Raw access to keyboard GPIOs.
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*
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* The keyboard matrix is read by driving output signals on the column lines
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* and reading the row lines.
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*/
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#ifndef __CROS_EC_KEYBOARD_RAW_H
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#define __CROS_EC_KEYBOARD_RAW_H
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#include "common.h"
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#include "gpio.h"
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/* Column values for keyboard_raw_drive_column() */
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enum keyboard_column_index {
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KEYBOARD_COLUMN_ALL = -2, /* Drive all columns */
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KEYBOARD_COLUMN_NONE = -1, /* Drive no columns (tri-state all) */
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/* 0 ~ KEYBOARD_COLS-1 for the corresponding column */
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};
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/**
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* Initialize the raw keyboard interface.
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*
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* Must be called before any other functions in this interface.
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*/
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void keyboard_raw_init(void);
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/**
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* Finish intitialization after task scheduling has started.
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*
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* Call from the keyboard scan task.
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*/
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void keyboard_raw_task_start(void);
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/**
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* Drive the specified column low.
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*
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* Other columns are tristated. See enum keyboard_column_index for special
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* values for <col>.
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*/
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void keyboard_raw_drive_column(int col);
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/**
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* Read raw row state.
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*
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* Bits are 1 if signal is present, 0 if not present.
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*/
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int keyboard_raw_read_rows(void);
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/**
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* Enable or disable keyboard interrupts.
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*
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* Enabling interrupts will clear any pending interrupt bits. To avoid missing
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* any interrupts that occur between the end of scanning and then, you should
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* call keyboard_raw_read_rows() after this. If it returns non-zero, disable
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* interrupts and go back to polling mode instead of waiting for an interrupt.
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*/
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void keyboard_raw_enable_interrupt(int enable);
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#ifdef CONFIG_TASK_KEYSCAN
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/**
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* GPIO interrupt for raw keyboard input
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*/
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void keyboard_raw_gpio_interrupt(enum gpio_signal signal);
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#else
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#define keyboard_raw_gpio_interrupt NULL
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#endif
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#endif /* __CROS_EC_KEYBOARD_RAW_H */
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