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https://github.com/Telecominfraproject/OpenCellular.git
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29d25d807c
Tristage all columns as soon as possible right after the power button is pressed. This can avoid the silego chip to reset the EC. Resume the interrupt mode after power button is released so that the deasserted columns doesn't trigger EC reset. Also change some function names for export. BUG=chrome-os-partner:7486 TEST= press g first, then power button. repeat many times. system is not rebooted. press power button first, then g. repeat many times. system is not rebooted. ESC+power is still reseting system. The long press power button still shutdowns system. Change-Id: Ie5dec20ec3d3c4ffbd4acf5a4dd7f63eec38af56
83 lines
2.4 KiB
C
83 lines
2.4 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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/* Clear the keyboard buffer to host. */
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void keyboard_clear_underlying_buffer(void);
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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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