mirror of
https://github.com/Keychron/qmk_firmware.git
synced 2024-12-29 12:48:52 +06:00
140 lines
4.1 KiB
C
140 lines
4.1 KiB
C
/*
|
|
Copyright 2010,2011,2012,2013 Jun WAKO <wakojun@gmail.com>
|
|
|
|
This software is licensed with a Modified BSD License.
|
|
All of this is supposed to be Free Software, Open Source, DFSG-free,
|
|
GPL-compatible, and OK to use in both free and proprietary applications.
|
|
Additions and corrections to this file are welcome.
|
|
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the
|
|
distribution.
|
|
|
|
* Neither the name of the copyright holders nor the names of
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdbool.h>
|
|
#include "wait.h"
|
|
#include "ps2_io.h"
|
|
#include "print.h"
|
|
|
|
/*
|
|
* Primitive PS/2 Library for AVR
|
|
*
|
|
* PS/2 Resources
|
|
* --------------
|
|
* [1] The PS/2 Mouse/Keyboard Protocol
|
|
* http://www.computer-engineering.org/ps2protocol/
|
|
* Concise and thorough primer of PS/2 protocol.
|
|
*
|
|
* [2] Keyboard and Auxiliary Device Controller
|
|
* http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
|
|
* Signal Timing and Format
|
|
*
|
|
* [3] Keyboards(101- and 102-key)
|
|
* http://www.mcamafia.de/pdf/ibm_hitrc11.pdf
|
|
* Keyboard Layout, Scan Code Set, POR, and Commands.
|
|
*
|
|
* [4] PS/2 Reference Manuals
|
|
* http://www.mcamafia.de/pdf/ibm_hitrc07.pdf
|
|
* Collection of IBM Personal System/2 documents.
|
|
*
|
|
* [5] TrackPoint Engineering Specifications for version 3E
|
|
* https://web.archive.org/web/20100526161812/http://wwwcssrv.almaden.ibm.com/trackpoint/download.html
|
|
*/
|
|
#define PS2_ACK 0xFA
|
|
#define PS2_RESEND 0xFE
|
|
#define PS2_SET_LED 0xED
|
|
|
|
// TODO: error numbers
|
|
#define PS2_ERR_NONE 0
|
|
#define PS2_ERR_STARTBIT1 1
|
|
#define PS2_ERR_STARTBIT2 2
|
|
#define PS2_ERR_STARTBIT3 3
|
|
#define PS2_ERR_PARITY 0x10
|
|
#define PS2_ERR_NODATA 0x20
|
|
|
|
#define PS2_LED_SCROLL_LOCK 0
|
|
#define PS2_LED_NUM_LOCK 1
|
|
#define PS2_LED_CAPS_LOCK 2
|
|
|
|
extern uint8_t ps2_error;
|
|
|
|
void ps2_host_init(void);
|
|
uint8_t ps2_host_send(uint8_t data);
|
|
uint8_t ps2_host_recv_response(void);
|
|
uint8_t ps2_host_recv(void);
|
|
void ps2_host_set_led(uint8_t usb_led);
|
|
|
|
/*--------------------------------------------------------------------
|
|
* static functions
|
|
*------------------------------------------------------------------*/
|
|
static inline uint16_t wait_clock_lo(uint16_t us) {
|
|
while (clock_in() && us) {
|
|
asm("");
|
|
wait_us(1);
|
|
us--;
|
|
}
|
|
return us;
|
|
}
|
|
static inline uint16_t wait_clock_hi(uint16_t us) {
|
|
while (!clock_in() && us) {
|
|
asm("");
|
|
wait_us(1);
|
|
us--;
|
|
}
|
|
return us;
|
|
}
|
|
static inline uint16_t wait_data_lo(uint16_t us) {
|
|
while (data_in() && us) {
|
|
asm("");
|
|
wait_us(1);
|
|
us--;
|
|
}
|
|
return us;
|
|
}
|
|
static inline uint16_t wait_data_hi(uint16_t us) {
|
|
while (!data_in() && us) {
|
|
asm("");
|
|
wait_us(1);
|
|
us--;
|
|
}
|
|
return us;
|
|
}
|
|
|
|
/* idle state that device can send */
|
|
static inline void idle(void) {
|
|
clock_hi();
|
|
data_hi();
|
|
}
|
|
|
|
/* inhibit device to send */
|
|
static inline void inhibit(void) {
|
|
clock_lo();
|
|
data_hi();
|
|
}
|