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/* Copyright (c) 2013 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.
*
* The functions implemented by keyboard component of EC core.
*/
#ifndef __CROS_EC_KEYBOARD_8042_H
#define __CROS_EC_KEYBOARD_8042_H
#include <stddef.h>
#include "button.h"
#include "common.h"
/**
* Called by power button handler and button interrupt handler.
*
* This function sends the corresponding make or break code to the host.
*/
void button_state_changed(enum keyboard_button_type button, int is_pressed);
/**
* Notify the keyboard module when a byte is written by the host.
*
* Note: This is called in interrupt context by the LPC interrupt handler.
*
* @param data Byte written by host
* @param is_cmd Is byte command (!=0) or data (0)
*/
void keyboard_host_write(int data, int is_cmd);
/**
* Send a scan code to the host.
*
* The EC lib will push the scan code bytes to host via port 0x60 and assert
* the IBF flag to trigger an interrupt. The EC lib must queue them if the
* host cannot read the previous byte away in time.
*
* @param len Number of bytes to send to the host
* @param bytes Data to send
*/
void i8042_send_to_host(int len, const uint8_t *bytes);
/* Utilities for scan code and make code. */
enum scancode_set_list {
SCANCODE_GET_SET = 0,
SCANCODE_SET_1,
SCANCODE_SET_2,
SCANCODE_SET_3,
SCANCODE_MAX = SCANCODE_SET_3,
};
struct makecode_entry {
uint16_t set1, set2;
};
struct makecode_translate_entry {
struct makecode_entry from, to;
};
/**
* Checks if a given make code matches given record.
*
* Returns 1 if matches.
*/
int makecode_match(uint16_t make_code, enum scancode_set_list code_set,
const struct makecode_entry *entry);
/**
* Translate a make code to different value.
*
* @param make_code The value of make_code.
* @param code_set The code set of make code.
* @param entries Pointer to array of struct makecode_translate_entry
* @param count Number of elements in entries
*/
uint16_t makecode_translate(
uint16_t make_code, enum scancode_set_list code_set,
const struct makecode_translate_entry *entries, size_t count);
/**
* Returns a board-specific translated make code.
*
* @param make_code 8042 make code
* @param pressed Whether the key was pressed
* @param code_set 8042 scan code set
*/
uint16_t keyboard_board_translate(
uint16_t make_code, int8_t pressed,
enum scancode_set_list code_set);
#endif /* __CROS_EC_KEYBOARD_8042_H */
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