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https://github.com/Telecominfraproject/OpenCellular.git
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b2c4ee6cf8
BUG=none TEST=(run the commands) Change-Id: Ibc414ffd594e06dbdce64c51859b6f247bb10d36 Signed-off-by: Randall Spangler <rspangler@chromium.org>
80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/* Copyright (c) 2011 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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* The functions implemented by keyboard component of EC core.
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*/
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#ifndef __INCLUDE_KEYBOARD_H
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#define __INCLUDE_KEYBOARD_H
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#include "common.h"
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/***************************************************************************/
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/* Functions exported by common/keyboard.c.
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*/
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#define MAX_SCAN_CODE_LEN 4
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#define MAX_KBLOG 512
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/* Called by keyboard scan code once any key state change (after de-bounce),
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*
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* This function will look up matrix table and convert scancode host.
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*/
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void keyboard_state_changed(int row, int col, int is_pressed);
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/* Handle the port 0x60 writes from host.
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*
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* This functions returns the number of bytes stored in *output buffer.
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*/
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int handle_keyboard_data(uint8_t data, uint8_t *output);
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/* Handle the port 0x64 writes from host.
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*
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* This functions returns the number of bytes stored in *output buffer.
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* BUT theose bytes will appear at port 0x60.
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*/
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int handle_keyboard_command(uint8_t command, uint8_t *output);
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/* Send make/break code of power button to host.
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*/
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void keyboard_set_power_button(int pressed);
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/* Log the keyboard-related information */
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void kblog_put(char type, uint8_t byte);
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/***************************************************************************/
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/* Below is the interface with the underlying chip-dependent code.
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*/
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#define MAX_KEYBOARD_MATRIX_ROWS 8
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#define MAX_KEYBOARD_MATRIX_COLS 16
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/* Asks the underlayer EC lib what keys are pressed right now.
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*
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* Sets bit_array to a debounced array of which keys are currently pressed,
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* where a 1-bit means the key is pressed. For example, if only row=2 col=3
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* is pressed, it would set bit_array to {0, 0, 0x08, 0, ...}
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*
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* bit_array must be at least MAX_KEYBOARD_MATRIX_COLS bytes long.
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*/
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enum ec_error_list keyboard_get_state(uint8_t *bit_array);
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/* Returns true if the to-host-buffer is non-empty. */
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int keyboard_has_char(void);
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/* Sends a char to host and triggers IRQ if specified. */
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void keyboard_put_char(uint8_t chr, int send_irq);
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/* Clears the keyboard buffer to host. */
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void keyboard_clear_buffer(void);
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/* Host just resumes the interrupt. Sends an interrupt if buffer is non-empty.
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*/
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void keyboard_resume_interrupt(void);
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#endif /* __INCLUDE_KEYBOARD_H */
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